Search Results — 2000 specimen records retrieved (1796 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC84949  Abies magnifica var. magnifica Lowell Ahart 2003-10-15 10633 Plumas About 60 yards south of the road to Tamarack Flat, on the south side of a very small branch of Fall River, about 1/8 mile west of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, about 1 mile (air) northwest of Little Grass Valley Reservoir dam, about 4 miles (air) northwest of La Porte. 1714 Comment
  CHSC39374  Abutilon theophrasti L. Ahart 1983-8-27 4364 Sutter A little south of the Myers home, Myers Ranch, Sutter Buttes, west of Marysville. 50 Comment
  CAS-BOT-BC330980  Acer glabrum var. glabrum Lowell Ahart 1981-8-7 3023 Plumas About 1 mile NE of Pilot Peak, ca 16 miles NE of La Porte. 1900 Comment
  CAS-BOT-BC330981  Acer glabrum var. glabrum Lowell Ahart 1989-7-2 6348 Plumas NW side of Pilot Peak, about 10 miles NE of La Porte 2133 Comment
  CHSC111727  Acer negundo Lowell Ahart 2012-6-21 18222 Butte About 25 yards west of the Freeway, 70 yards south of Big Chico Creek, Lower Bidwell Park, Chico. 62 Comment
  JEPS119586  Acer negundo Lowell Ahart 2012-4-17 17871 Butte On the west side of Gridley Road, about 1/8 mile southeast of the bridge over the Feather River, about 2 miles west of Highway 70. Comment
  CHSC109627  Acer saccharinum Lowell Ahart 2012-5-17 18087 Butte On the south edge of Big Chico Creek, east of the Deer Pen, between Table 12 and 13, Lower Bidwell Park, Chico. 76 Comment
  JEPS107711  Achillea millefolium Lowell Ahart, John Dittes 2005-9-19 12406 Plumas Along the sides of a good dirt road, about 1 1/4 miles east of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake 1989 Comment
  CHSC93506  Achnatherum lemmonii Lowell Ahart 2006-5-10 12625 Butte Road bank, on the south side of the poor dirt road, Bardees Bar Road, south of the small stream, about 200 yards northwest of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 1/2 miles (air) southwest of Pulga. 385 Comment
  RSA726409  Achnatherum lemmonii L. Ahart, John Dittes, Josephine Guardino 2007-6-8 14013 Plumas About a mile (air) north of the north end of Lake Davis. 1966 Comment
  CHSC61899  Achnatherum occidentale subsp. californicum Lowell Ahart 1993-9-10 7194 Sierra On the north side of Mount Fillmore, about 1 mile south-west of the dirt road from Gibsonville to Johnsville. 2133 Comment
  JEPS87475  Achnatherum occidentale subsp. californicum Lowell Ahart 1993-9-10 7194 Sierra 1 mi sw dirt road from Gibsonville to Johnsville (at the end of a poor dirt road near a camp and water ditch, n. side Mount Fillmore); Mount Fillmore 2133 Comment
  CHSC102163  Acmispon americanus var. americanus Lowell Ahart 2009-6-19 15930 Butte On dry soil, on the north side of Ten Mile House Road, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 379 Comment
  CHSC80947  Acmispon americanus var. americanus Lowell Ahart 2001-7-27 9045 Nevada On a small gravel bar, strand of Prosser Creek Reservoir, south of Commemorative Emigrant Trail, about 1/4 mile east of Highway 89, about 4 miles (air) north of Truckee. 1746 Comment
  CHSC99944  Acmispon americanus var. americanus Lowell Ahart; John Dittes 2008-8-22 15271 -A Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CHSC50667  Acmispon argophyllus var. fremontii Lowell Ahart 1990-5-25 6482 Butte Near the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprise Bridge across Lake Oroville. 274 Comment
  CAS-BOT-BC204848  Acmispon argophyllus var. fremontii Lowell Ahart 1987-5-9 5600 Butte Along Pulga Road, about 1 mile south-west of Bardees Bar along the North Fork of the Feather River, abou 3 1/2 miles south-west of Pulga 365 Comment
  CHSC108204  Acmispon brachycarpus Lowell Ahart 2011-6-7 17392 Yuba On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  CHSC117000  Acmispon brachycarpus Lowell Ahart 2016-6-4 20921 Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. 387 Comment
  CHSC80640  Acmispon brachycarpus Lowell Ahart 2001-6-16 8878 Tehama On north side of the dirt road, about 4-1/2 miles west of Highway 32, west of Soda Springs Campground, about 5 miles (air) west of Butte Meadows. 1112 Comment
  CHSC99327  Acmispon nevadensis var. nevadensis Lowell Ahart 2008-5-12 14729 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 40 yards east of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam. 258 Comment
  CHSC36236  Acmispon parviflorus Lowell Ahart 1982-4-23 3326 Sutter East slope of ridge west of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  CHSC90994  Acmispon wrangelianus Lowell Ahart 2005-5-11 11798 Butte On the bottom of a small vernal pool, south part of North Table Mountain, about 300 yards northwest of the poor dirt road off of Cherokee Road, about 200 yards south of the rim into Beatson Hollow, about 7 miles (air) north of Oroville. 354 Comment
  JEPS114407  Aconitum columbianum var. columbianum Lowell Ahart 2008-7-16 15081 Plumas In a small meadow (swamp), about 100 yards north of the paved road, about 1/4 mile west of the bridge where the South Fork of the Feather River flows into Little Grass Valley Reservoir, about 2 1/2 miles (air) north of La Porte 1597 Comment
  CHSC84401  Adenocaulon bicolor Lowell Ahart 2003-8-5 10470 Plumas On the east side of Hopkins Creek, on the west side of the road, about 1/8 mile south of Turkey Town, about 1 mile (air) southwest of Blue Nose Mountain. 1524 Comment
  HSC96894  Adenostoma fasciculatum L. Ahart 2006-6-15 12746 Glenn Black Diamond Rd., about 2.5 mi. W of the paved road, 4.75 mi. from Stonyford 750 Comment
  HSC97019  Aegilops cylindrica L. Ahart 2005-7-12 12142 Butte Forest Road 21N40, ~100 yards west of Encina Grade Road (Bloomer Hill Road) (Forest Road 21N39) 823 Comment
  RSA716145  Aegilops cylindrica L. Ahart 2005-7-12 12142 Butte Poor road on the south side of Forest Road 21N40, about 100 yards west of Encina Grade Road (Bloomer Hill Road) (Forest Road 21N39), about 3/4 mile (air) west of Bloomer Hill, about 6 miles west of Oroville Quincy Highway. 823 Comment
  CDA1674  Aegilops triuncialis L. Ahart 2000-5-16 8357 Butte West of Larkin Road, about 1 1/4 miles south of the Oroville Airport. About 5 miles (air) southwest of Oroville. On the north side of the access road to the boat ramp at the Thermalito Afterbay. Comment
  CHSC107225  Aegilops triuncialis Lowell Ahart; John Dittes 2011-6-9 17469 Tehama On gravel bar, on the southeast side of Acorn Hollow Creek, at confluence of Dry Creek, 2.1 miles (air) east of Highway 99, 3.8 miles (air) north of Vina. 75 Comment
  UC1609422  Agastache urticifolia Lowell Ahart 1993-9-24 7260 Sierra n side Mount Fillmore (about 1/2 mi s of the dirt road from Gibsonville to Johnsville); n side of Mount Fillmore 2042 Comment
  CHSC102107  Ageratina occidentalis Lowell Ahart; John Dittes, Josephine Guardino 2009-7-29 16215 Plumas On dry rocky soil, along a drainage from a snow lake, about 100 yards northeast of the snow lake, on the south side of Forest Road 26N67F3, 1.2 miles (air) northeast of Rush Creek Hill, 2.6 miles (air) east-southeast of Caribou Powerhouse. 1677 Comment
  CHSC45219  Ageratina occidentalis Lowell Ahart 1974-9-6 625 Plumas Near the house along the West Branch of Nelson Creek, about 5 miles west of Johnsville. 1828 Comment
  CHSC61626  Ageratina occidentalis Lowell Ahart 1993-9-8 7167 Butte On the top of the ridge, about 1/2 mile east of Snow Mountain. 2103 Comment
  RSA715617  Agoseris glauca var. dasycephala L. Ahart, John Dittes 2005-6-1 11851 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  CHSC42474  Agoseris heterophylla Lowell Ahart 1987-5-6 5497 Butte Along the North Fork of the Feather River, Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS102395  Agoseris monticola Lowell Ahart 2001-7-21 8955 Nevada On the edge of a large meadow, on the south side of the dirt road, east of the old sheep corral, NE of Lake Van Norden, about 1 1/2 miles east of Soda Springs. 2063 Comment
  UCD128616  Agoseris monticola Lowell Ahart 1995-10-3 7669 Butte along the north side of Butte Creeke House Meadow, about 2.5 miles (air) north-east of Snag Lake. 1767 Comment
  CAS-BOT-BC127077  Agrostis exarata Lowell Ahart 1987-9-22 5891 Plumas Along the South Fork of the Feather River, about 1 mile east of the Feather Fork Mine, about 8 miles northeast of La Porte. 1706 Comment
  CAS-BOT-BC127364  Agrostis exarata Lowell Ahart 1987-7-8 5799 Butte Along Big Bar Mountain Road, about 3 miles southwest of Coyote Gap, southeast of Pulga. 1280 Comment
  CAS-BOT-BC127374  Agrostis exarata Lowell Ahart 1988-7-31 6152 Butte On the east side of the West Branch of the Feather River, north of the bridge, about 4 road miles north of Stirling City. 914 Comment
  CAS-BOT-BC127390  Agrostis exarata Lowell Ahart 1982-7-28 3729 Sierra Sierra Nevada. Along the edge of the dirt road north of the Pacific Mine, ca. 5 miles east of La Porte. 1700 Comment
  CHSC92817  Agrostis exarata Lowell Ahart; Josephine Guardino 2005-8-9 12285 Plumas On the bottom of Fant Creek, about 100 yards southeast of the cabin (destroyed) and corral, north of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1597 Comment
  CHSC31728  Agrostis exarata var. monolepis L. Ahart 1977-6-16 1421 Butte In a small wash that drains into North Honcut Creek. Peter Ahart Ranch, Honcut. 50 Comment
  CAS-BOT-BC139719  Agrostis gigantea Lowell Ahart 1987-6-9 5731 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles southeast of Jarbo Gap. 271 Comment
  CHSC81177  Agrostis idahoensis Lowell Ahart 2001-8-14 9130 Nevada On the bottom of Jackson Creek, on the south side of Meadow Lake Road (Forest Road 18), south of and between the two sets of three large culverts where the road crosses Jackson Creek, at the east and of Bowman Lake and west of the major campgrounds and buildings. 1706 Comment
  JEPS104596  Agrostis idahoensis Lowell Ahart 2003-7-25 10445 Nevada Log landing, on the w side of a poor road, ca 100 yd n of the locked gate, ca 1/8 mi n of Grouse Ridge Rd, ca 1/2 mi ne of Bowman Lake Rd (Forest Rd 18) ca 5 mi (air) n of Bear Valley and Highway 20. 1751 Comment
  SEINET10507103  Agrostis idahoensis Lowell Ahart 1985-7-11 Ahart 5143 Plumas Below the high water line of Little Grass Valley Reservoir, where the South Fork of the Feather River flows into the lake, about 4 1/4 miles north-east of La Porte. Comment
  CHSC103938  Agrostis microphylla Lowell Ahart 2010-5-16 16700 A Butte East of basalt cliffs, about 1/2 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 364 Comment
  CHSC93479  Agrostis microphylla Lowell Ahart 2006-5-3 12560 Butte On the west side of a small stream, about 50 yards south of the fence, about 1 mile northwest of the parking area, cow chute, and Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 378 Comment
  CHSC59035  Agrostis pallens Lowell Ahart 1992-7-26 6838 Butte On the south side of Coon Hollow, about 1/2 mile north of the Carr Mine, about 2 (air) miles south of Snow Mountain. 1737 Comment
  JEPS113258  Agrostis pallens Lowell Ahart 2007-5-29 13965 Butte Seep on the east side of Bald Rock Dome, on the west side of the Dome Trail, trail leads to the Middle Fork of the Feather River, about 1 3/4 miles by the trail from the trail head which is 3/10 mile east of Bean Creek Road, about 2 miles (air) northeast 585 Comment
  JEPS106271  Agrostis scabra Lowell Ahart 2004-7-17 11271 Nevada Near small stream, upper reaches of Steephollow Creek, ca. 50 yd E of Hwy 20, ca. 150 yd SE of intersection of Hwy 20 and Lowell Hill Rd, ca. 2 mi NW of Bear Valley, ca. 3 mi SE of the Omega Rest Area, ca. 16 mi (air) NE of Nevada City 1463 Comment
  SEINET10510739  Agrostis tenuis Lowell Ahart 1988-9-4 Ahart 6179 Butte On damp rocky soil, on the bottom and sides of Big Kimshew Creek, the creek crosses a large meadow. about 1 air mile north-east of Jones Meadow. Uncommon. Mountain meadow in Red Fir Forest. Comment
  JEPS102450  Agrostis variabilis Lowell Ahart 2001-8-14 9162 Nevada Near Round Valley, about 1 mile NW of Graniteville Road (Forest Road 18), about 3/4 mile (air) west of Jackson Meadow Reservoir Dam. 1981 Comment
  CHSC39555  Ailanthus altissima Lowell Ahart 1983-7-24 4208 Butte Near the dirt road at the Forbestown Res., about 5 miles north-east of Forbestown. 450 Comment
  CAS-BOT-BC138424  Aira caryophyllea Lowell Ahart 1980-4-13 2078 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CHSC101656  Aira caryophyllea Lowell Ahart 2009-4-26 15616 Butte About 10 miles northeast of Chico, Upper Bidwell Park, about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 150 yards southwest of Ten Mile House Road, on south edge of a small open meadow.. 286 Comment
  JEPS115952  Aira caryophyllea Lowell Ahart 2009-4-26 15616 Butte About 10 miles northeast of Chico, Upper Bidwell Park, about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 150 yards southwest of Ten Mile House Road, on south edge of a small open meadow 286 Comment
  CAS-BOT-BC445314  Alisma lanceolatum Lowell Ahart 1981-6-4 2838 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CHSC111095  Alisma triviale Lowell Ahart; John Dittes 2012-7-12 18372 Modoc North edge of Ash Creek, south of the gravil pit, about 1/8 miles east of the parking area on the east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  JEPS124115  Alisma triviale Lowell Ahart, John Dittes 2015-6-22 20266 Tehama About 1.2 miles east of the of the intersection of Lassen Road and State Highway 99-E, about 4 miles (air) east of Vina, about 7 miles (air) southeast of Los Molinos. Comment
  UCD137959  Alisma triviale L. Ahart 1975-7-5 853 Butte North Honcut Creek, Peter Ahart Ranch, Honcut. 45 Comment
  SEINET10472027  Allium amplectens Lowell Ahart 1985-5-5 Ahart 4907 Sutter Dean Ranch about 3 1/4 miles north-west of Sutter, Sutter Buttes. Comment
  CHSC46521  Allium campanulatum Lowell Ahart 1977-7-9 1458 Plumas Near Bunker Hill Creek, about 1/2 mile north of the Bunker Hill Mine, about 10 miles north-east of La Porte. 1706 Comment
  JEPS108832  Allium campanulatum Lowell Ahart 2006-6-28 12871 Sierra About 3/4 mile (air) east of Lake Delahunty, about 2 miles (air) northeast of Gibsonville 1784 Comment
  SBBG128800  Allium fimbriatum var. purdyi L. Ahart, J. Dittes, J. Guardino 2013-4-26 18641 Colusa rocky serpentine outcrop on N side of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  CAS-BOT-BC472812  Allium obtusum Lowell Ahart 1983-8-17 4328 Plumas South of Onion Valley, near the Quincy La Porte Road, west of Pilot Pk., north-east of La Porte 2000 Comment
  CHSC44518  Allium obtusum var. obtusum Lowell Ahart 1988-3-28 5954 Butte Near Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles east of Feather Falls. 1280 Comment
  CHSC39589  Allium platycaule Lowell Ahart 1983-7-20 4200 Plumas About 1/4 mile east of the Feather Fork Mine, about 5 1/2 miles north of La Porte. 1800 Comment
  CAS-BOT-BC132115  Allium sanbornii var. sanbornii Lowell Ahart 1980-7-29 2501 Butte Along the edge of Forbestown Road Comment
  JEPS117692  Allium sanbornii var. sanbornii Lowell Ahart 2010-7-27 16911 Butte On the west side of Forbestown Road, about 1/10 mile north of Black Bart Road, about 11 miles east of Oroville 741 Comment
  CHSC100321  Allophyllum integrifolium Lowell Ahart 2008-8-14 15200 Plumas 20 yards northeast of the metal gate, east side of Forest Road 22N68, about 50 yards west of the South Fork of the Feather River, about 1/2 mile northeast of Little Grass Valley Reservoir, about 5 miles (air) northeast of La Porte. 1571 Comment
  JEPS113798  Allophyllum integrifolium Lowell Ahart, John Dittes, Josephine Guardino 2007-6-9 14049 Plumas 150 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis 1965 Comment
  JEPS117435  Alnus incana subsp. tenuifolia Lowell Ahart 2010-9-15 17194 Sierra On the northwest edge of the first pond, south side of the road and west of the cabin, at the spring, about 2 3/4 miles (air) north of Yuba Pass on Highway 49, about 4 miles (air) east of Haskell Peak 2134 Comment
  CHSC109639  Alopecurus aequalis var. aequalis Lowell Ahart; John Dittes 2012-7-10 18308 Modoc Along a deep drainage, northeast of the old homestead, Ash Creek State Wildlife Area, about 3.2 miles (air) west of Adin, about 8.4 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC110902  Alopecurus carolinianus Lowell Ahart; John Dittes 2012-7-12 1357 Modoc About 1/8 mile east of the parking area on the east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  CHSC102537  Amaranthus albus Lowell Ahart 2009-10-27 16473 Napa Below the high water line of Lake Berryessa, about 100 yards east of Eticuera Creek, about 50 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of Winters. 130 Comment
  CHSC112486  Amaranthus albus Lowell Ahart 2013-10-19 19122 Glenn On the east side of the backwater, along the west side of the Sacramento River, about 300 yards north of the bridge, west of Butte City. 26 Comment
  CHSC69409  Amaranthus albus Lowell Ahart 1997-8-13 7869 Yuba South side of Scott Forbes Road, 1/4 mile east of the intersection of Scott Forbes Road and Peoria Road, just east of Gray Drive, about 2 1/4 air miles east of Browns Valley. 91 Comment
  RSA726362  Amaranthus albus L. Ahart 2007-7-2 14240 Butte East road edge of Oroville Quincey Highway, about one mile south of Big Ridge Road, about 9 miles (air) northeast of Oroville. 363 Comment
  SEINET10478739  Amaranthus albus Lowell Ahart 1985-10-19 Ahart 5211 Sutter Dean Ranch, Sutter Buttes. About 12 miles west of Marysville. Comment
  CHSC112996  Amaranthus blitoides Lowell Ahart 2013-8-2 18985 Tehama On the bottom of Burris Creek, strand of Black Butte Reservoir, about 1 1/2 miles southwest of the Dam, about 12 miles (air) northwest of Orland. 135 Comment
  JEPS123852  Amaranthus blitoides Lowell Ahart, John Dittes 2015-7-14 20324 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CHSC84970  Amaranthus californicus Lowell Ahart 2003-10-23 10658 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS115003  Amaranthus californicus Lowell Ahart 2007-11-13 14596 Placer On the strand of Camp Far West Reservoir, about 300 yards west of Bear River, about 1/8 mile east of McCourtney Road, about 5 miles (air) northeast of Sheridan 73 Comment
  CDA42839  Amaranthus deflexus L. Ahart 2011-6-3 17362 Butte Wood chipped planter area between Bidwell Mansion parking area and Gateway Science Museum, Chico. Comment
  JEPS128595  Amaranthus deflexus Lowell Ahart 2017-8-1 21652 Butte Park west of railroad, northeast of the intersection of Virginia Street and Sycamore Street, in Gridley. Comment
  UCD97418  Amaranthus deflexus L. Ahart 1982-7-10 3666 Butte Near a small building in parking lot at check-in station, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 Comment
  CDA31982  Amaranthus hybridus L. Ahart 2007-5-14 13841 Yuba East of the dirt road, 20 yards northeast of the gate, about 20 yards south of the power tower, about 20 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville Comment
  HSC102798  Amaranthus palmeri L. Ahart 2013-10-16 19111 Butte West side of Hwy. 99E, ~ 1.0 mi. E of Biggs, and ~ 20 yds. south of B Street. 30 Comment
  CHSC76262  Amaranthus powellii Lowell Ahart; Vernon H. Oswald 1999-9-13 8226 Lassen Along a small slough on the north side of Mapes Road, about 1/2 mile east of lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 Comment
  CDA3282  Amaranthus retroflexus L. Ahart 2006-9-28 13365 Butte On the east side of the North Fork of the Feather River, on the west side of Highway 70, about 50 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel. Comment
  CHSC97722  Ambrosia psilostachya Lowell Ahart 2007-10-30 14509 Butte On the south side of the water ditch, on the north side of Lower Wyandotte Road, about 2 1/2 miles (air) northeast of Palermo, about 4 1/4 miles (air) southeast of Oroville. 129 Comment
  JEPS114421  Amelanchier alnifolia var. semiintegrifolia Lowell Ahart 2008-7-9 15057 Plumas Steep north side of a good logging road , north of the South Fork of the Feather River, about 1/2 mile southwest of the Feather Fork Mine, about 1 mile northeast of Little Grass Valley Reservoir 1645 Comment
  RSA754965  Amelanchier alnifolia var. semiintegrifolia L. Ahart 2008-6-5 14813 Plumas Good logging road north of the South Fork of the Feather River, about 0.5 mile southwest of the Feather Fork Mine, about 1 mile northeast of Little Grass Valley Reservoir. Comment
  CHSC100458  Amelanchier utahensis Lowell Ahart; John Dittes 2008-8-25 15326 Modoc On the east side of East Gouger Neck Road, east of the Pit River, 2.1 miles by road from County Road 91, 5.6 miles (air) northeast of Lookout. 1293 Comment
  CHSC105664  Ammannia coccinea Lowell Ahart; John Dittes 2010-10-4 17295 Tehama Along Toomes Creek, Toomes Creek at Tehama-Vina Road crossing, 1.2 miles (air) east of the Sacramento River, 3.4 miles (air) southeast of Los Molinos (High School), 3.0 miles (air) northwest of Vina. 57 Comment
  CHSC112035  Ammannia coccinea Lowell Ahart 2012-8-14 18428 Glenn On dry bare gravelly soil, on the strand of Black Butte Reservoir (west side), about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte Reservoir. 136 Comment
  JEPS119946  Ammannia coccinea Lowell Ahart 2012-8-24 18428 Glenn On the strand of Black Butte Reservoir (west side), about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte Reservoir. Comment
  SBBG120071  Ammannia coccinea L. Ahart 2006-8-5 13085 Butte Peter Ahart Ranch, ca. 1.5 mi N and 300 yards E of Honcut, ca. 12 mi S of Oroville 30 Comment
  SEINET5343062  Ammannia coccinea L. Ahart 1974-7-22 s.n. Sutter Near Live Oak Comment
  CHSC96504  Amsinckia eastwoodiae Lowell Ahart; Brian Williams 2007-4-13 13670 Placer Waste area about 50 yards north of the Manzanita Cemetery, about 3 1/3 miles north of Lincoln. 37 Comment
  RSA712999  Amsinckia intermedia L. Ahart 2006-4-23 12532 Butte On the east side of Cherokee Road, about 200 yards south of the cattle chute and parking area on the west side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 424 Comment
  CHSC109077  Amsinckia lycopsoides Lowell Ahart 2012-4-20 17889 Butte South of the trail, about 50 yards east of Big Chico Creek, about 100 yards west of Ten Mile House Road, about 3/4 mile west of Highway 32, about 9 miles northeast of Chico, south part of Upper Bidwell Park. 202 Comment
  CHSC96681  Amsinckia menziesii Lowell Ahart 2007-5-8 13728 Tehama Along flood plain of Dibble Creek, about 100 yards north of Highway 36, about 3.7 miles west of the intersection of Highway 36 and 99 or I-5, about 4 miles (air) northwest of Red Bluff. 111 Comment
  CHSC90336  Anagallis arvensis Lowell Ahart 2005-3-11 11599 Yuba On the west side of the poor dirt road, about 1/2 mile west of Marysville Road, about 1/4 mile north of Parking Area 3, Daugherty Hill Wildlife Area, Donovan Hill Management Area, about 1/4 mile north of Loma Rica Road, about 5 miles (air) northeast of Loma Rica. 344 Comment
  JEPS106066  Anagallis arvensis Lowell Ahart 2004-6-18 11098 Glenn Gravel bar on the north side of Salt Creek, south of the bridge across Salt Creek, on the south side of Newville Road, about 1/4 mile west of Newville, about 5 miles (air) west of Black Butte Reservoir 203 Comment
  JEPS127041  Anagallis arvensis Lowell Ahart, Josephine Guardino 2016-4-19 20784 Contra Costa 1.8 miles (air) northwest of Los Vaqueros Reservoir Marina, 2.1 miles (air) southwest of Los Vaqueros Reservoir Dam, approximately 25 miles (air) southwest of Stockton. Undesignated section of Canada de Los Vaqueros Land Grant, Byron Hot Springs USGS 7.5' Quad. Comment
  CHSC78368  Anaphalis margaritacea Lowell Ahart 2000-7-28 8615 Nevada Open flat and near a small dry stream, east side of Fall Creek, about 1/8 mile northeast of where Fall Creek crosses Forest Highway 18, or Bowman Lake Road, about 5 miles (air) or 8 miles by road north of Highway 20 and Bear Valley. 1706 Comment
  JEPS120971  Ancistrocarphus filagineus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18626 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC109789  Andropogon virginicus var. virginicus Lowell Ahart 2012-10-20 18505 Butte About 100 yards west of Table 4, west of Cedar Grove, Lower Bidwell Park, Chico. 68 Comment
  CHSC69127  Angelica breweri Lowell Ahart 1997-8-7 7836 Yuba On east side of the dirt road, about 2 miles (air) southeast of Woodleaf, about 3 miles (air) northeast of Challenge. 853 Comment
  JEPS87517  Anisocarpus madioides Lowell Ahart 1993-6-16 6971 Butte sw intersection of Black Bart Road and Forbestown Road (about 3 1/2 air mi sw of Forbestown) 609 Comment
  UC1609222  Anisocarpus madioides Lowell Ahart 1993-6-16 6971 Butte sw intersection of Black Bart Road and Forbestown Road (about 3 1/2 air mi sw of Forbestown) Comment
  CHSC44845  Antennaria rosea subsp. confinis Lowell Ahart 1975-8-17 931 Sierra Near French Meadows, about 3 air miles west and 1/2 mile south of Webber Lake. 2133 Comment
  CHSC94788  Anthemis cotula Lowell Ahart 2006-10-8 13427 Butte Mud flat, near a large gravel bar, east side of the North Fork of the Feather River, just east of where the river flows into a pool, on the west side of Highway 70, about 1/2 mile north of the Cresta Power House. 609 Comment
  JEPS102446  Anthoxanthum odoratum Lowell Ahart 2001-8-14 9128 Nevada Small mountain meadow, east of the dirt road that goes to Sawmill Lake, south of Prairie Creek, about 1/4 mile south of campgrounds and buildings at the east end of Bowman Lake. 1737 Comment
  CDA5612  Anthriscus caucalis L. Ahart 2005-4-18 11729 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. Comment
  JEPS118314  Anthriscus caucalis Lowell Ahart 2011-6-7 17369 Yuba Just south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville 66 Comment
  CHSC84201  Antirrhinum cornutum Lowell Ahart 2003-7-14 10402 Lake Along a small stream, on the west side of the second causeway going southwest on Bartlett Springs Road, Indian Valley Reservoir. 449 Comment
  CHSC51276  Antirrhinum leptaleum Lowell Ahart 1990-10-5 6630 Butte Below the high water line of Lake Oroville, about 1/4 mile south-west of the Enterprise Bridge across Lake Oroville. 266 Comment
  JEPS108810  Antirrhinum subcordatum Lowell Ahart 2006-6-11 12673 Colusa On the west side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  CHSC10780  Antirrhinum vexillo-calyculatum subsp. intermedium Lowell Ahart 1966-9-18 Sierra Along Goodyear's Bar Road. 1066 Comment
  RSA0059602  Apera interrupta Lowell Ahart, John Dittes 2011-6-21 17520 Modoc About 130 yards west of the fence, south edge of the meadow, Ash Creek State Wildlife Area, about 2,300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC45190  Aphanes occidentalis Lowell Ahart 1982-4-23 3344 Sutter Near cow trails, west of the Myers home, Myers Ranch, Sutter Buttes. 45 Comment
  RSA716505  Aphanes occidentalis L. Ahart 2005-3-11 11598 Yuba W side of the poor dirt road, 1/2 miles W of Marysville Road, 1/2 miles W of Marysville Road, 1/4 mile N oa Parking area 3, Daugherty Hill Wildlife area, Donovan Hill Management, 1/4 mile N of Loma Rica Road, 5 miles air NE of Loma Rica 345 Comment
  CHSC101915  Apocynum androsaemifolium Lowell Ahart; John Dittes 2009-7-14 16074 Plumas Along Forest Service Road 26N22, about 1.9 miles (air) southeast of Seneca, about 6 miles (air) south of Lake Almanor Reservoir Dam. 1536 Comment
  CHSC99918  Apocynum androsaemifolium Lowell Ahart 2008-7-18 15133 Nevada Along the south side of Highway 20, at the intersection of Highway 20 and Bowman Lake Road, southeast end of Bear Valley. 1439 Comment
  CHSC102418  Apocynum cannabinum Lowell Ahart 2009-6-19 15925 Butte On damp soil, on the east side of Big Chico Creek, southwest of the meadow, about 30 yards west of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of highway 32, about 10 miles northeast of Chico. 209 Comment
  CHSC87901  Apocynum cannabinum Lowell Ahart 2004-6-11 11040 Tehama On the southwest margin of Dead Rabbit Lake, about 100 yards west of the Nomalaki Trail, about 1 1/2 miles northwest of Bowers Creek, about 2 1/4 miles northwest of Forest Road 23N69 (Mud Flat Road), about 8 miles (air) southwest of Paskenta. 545 Comment
  POM366932  Aquilegia formosa var. truncata L. Ahart, P. Ahart 1984-6-10 4703 Butte About 2 mi SW of Forbestown Diversion Dam, NE of Forbestown. 700 Comment
  CHSC80516  Arabidopsis thaliana Lowell Ahart 2001-3-22 8719 Butte On the east side of a small swale and very near the north fence, about 100 yards east of the Olive Orchard and Palermo Honcut Highway, Peter Ahart Ranch, about 11 miles south of Oroville. 32 Comment
  JEPS110080  Arabis rectissima var. rectissima Lowell Ahart 2006-7-16 12969 Butte West edge of a large meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows 1569 Comment
  CAS-BOT-BC167245  Aralia californica Lowell Ahart 1983-7-24 4214 Butte At the Forbestown Res., about 5 miles north-east of Forbestown 450 Comment
  JEPS94620  Aralia californica Lowell Ahart 1997-8-7 7819 Yuba Peterson Ridge Rd. about 3 air mi se Challenge (on bottom and sides of small stream, a branch of Little Oregon Creek, on e side of dirt road) 762 Comment
  CHSC10616  Arceuthobium americanum Lowell Ahart 1972-6-28 131 Placer French Meadows. 1524 Comment
  CHSC45039  Arceuthobium californicum Lowell Ahart 1988-9-4 6173 Butte Host trees were on the north side of the dirt road, south of a branch of Last Chance Creek, about 1 1/2 miles south-west of Bald Mountain. 1005 Comment
  CHSC82491  Arceuthobium campylopodum Lowell Ahart; John Dittes, Josephine Guardino 2002-6-21 9753 Butte On the south side of a poor dirt road, Watson Ridge, about 2 miles (air) northeast of Bald Rock Dome, about 5 miles (air) north of Feather Falls (the town). Comment
  UCD169383  Arceuthobium campylopodum Lowell Ahart 2004-10-14 11458 Lake On the south edge of Bartlett Springs Road (Road M 12), near the northwest part of Indian Valley Reservoir. 458 Comment
  JEPS102666  Arceuthobium occidentale Lowell Ahart 2001-6-14 8841 Tehama About 100 yards north of road M2, and west of the poor dirt road that is used to service the power poles, about 8.5 miles west of Paskenta. 640 Comment
  CAS-BOT-BC38867  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 1985-2-17 4839 Butte At Kunkle Res., about 2 miles south of Paradise. 550 Comment
  JEPS119509  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 2012-3-2 17761 Butte About 200 yards north of Ten Mile House Road, about 200 yards west of Highway 32 about 9 miles northeast Chico. Comment
  CHSC40334  Arctostaphylos mewukka Lowell Ahart 1985-2-17 4840 Butte Near Kunkle Res., about 2 miles south of Paradise. 550 Comment
  CHSC106063  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2010-7-27 16913 Butte About 100 yards southwest of the intersection of Forbestown Road and Black Bart Road, about 11 miles east of Oroville. 741 Comment
  CHSC108844  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2012-2-22 17751 Butte On the high bank, on the south side of Ten Mile House Road, about 1/2 mile west of Highway 32, about 9 miles (air)northeast of Chico. 335 Comment
  CHSC109062  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2012-4-30 17941 Butte On the north side of Guardian Trail, about 200 yards west of Pine Trail, about 1/4 mile west of Highway 32, about 8 1/2 miles northeast of Chico, south part of Upper Bidwell Park. 397 Comment
  JEPS119557  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2012-2-22 17751 Butte On the south side of Ten Mile House Road, about 1/2 miles west of Highway 32, about 9 miles (air) northeast of Chico. Comment
  RSA795329  Arctostaphylos mewukka subsp. mewukka L. Ahart 2010-7-27 16913 Butte About 100 yards southwest of the intersection of Forbestown Road and Black Bart Road, about 11 miles east of Oroville. 742 Comment
  CHSC43530  Arctostaphylos nevadensis Lowell Ahart 1975-6-28 814 Sierra About 2 miles east of Gibsonville, about 3 miles west of Mount Fillmore. 1981 Comment
  SEINET10449337  Arctostaphylos viscida Lowell Ahart 1985-2-17 Ahart 4841 Butte On red rocky damp soil near Kunkle Res., About 2 miles south of Paradise. Comment
  JEPS113386  Arenaria kingii var. glabrescens Lowell Ahart, John Dittes, Josephine Guardino 2007-6-9 14043 Plumas Along the west side of a poor dirt road, about a mile (air) north of the north end of Lake Davis 1857 Comment
  SEINET10507232  Aristida hamulosa Lowell Ahart 1983-8-16 Ahart 4277 Butte T22N R2E sec 14? Along Hwy 32, ca. 1 mi e of Chico. Valley Grassland; 100 m. 100 Comment
  JEPS94665  Aristida ternipes var. hamulosa Lowell Ahart 1998-6-9 7994 Butte about 7 air mi n Oroville (about 1/2 mi nw of the lone oak tree, nw of the cow chute along Cherokee Road); North Table Mountain 396 Comment
  CHSC35312  Aristolochia californica L. Ahart 1982-3-6 3235 Sutter NW of Dean Cabin, Dean Ranch, Sutter Buttes. 350 Comment
  CHSC97583  Arnica chamissonis Lowell Ahart; John Dittes 2007-6-17 14199 Plumas Along Red Clover Creek, about 30 yards east of County Road 111 (Beckwourth Genesee Road), about 1/4 mile east of bridge across Red Clover Creek, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1654 Comment
  CHSC99733  Arnica chamissonis Lowell Ahart; John Dittes 2008-6-20 14906 Lassen About 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  SEINET13711329  Arnica mollis Lowell William Ahart, Lowell William Ahart 2001-1 8956 Nevada NE of Lake Van Norden, 1.5 Mi. E of Soda Springs (T17N, R14E, sec 25, NW 1/4) 6770 Ft. 2063 Comment
  CHSC113868  Artemisia douglasiana Lowell Ahart 2014-8-26 19787 -A Plumas In the middle of the South Fork of the Feather River, Little Grass Valley Resrvoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. 1533 Comment
  CHSC94281  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CHSC94568  Artemisia douglasiana Lowell Ahart 2006-9-11 13273 Butte Gravel bar, south side of the North Fork of the Feather River, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville. 431 Comment
  CHSC106347  Artemisia ludoviciana subsp. ludoviciana Lowell Ahart; John Dittes 2010-8-30 17051 Modoc About 10 yards west of the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2,300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA716597  Artemisia tridentata subsp. tridentata L. Ahart, John Dittes 2005-9-19 12414 Plumas About 1.5 miles southeast of Kettle Rock, about 1.5 miles southeast of Taylor Lake 2008 Comment
  RSA0104727  Asclepias eriocarpa Lowell A. Ahart 2009-6-18 15915 Butte On the east side of a wash, south of the fence, about 40 yards west of the dredger piles along North Honcut Creek, about 2 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville. 59 Comment
  SEINET10496162  Asclepias fascicularis Lowell Ahart 1985-6-30 Ahart 5074 Butte Abut 1 mile west of intersection of Forbestown Road with Robinson Mill Road, N of Oroville. Comment
  CHSC112457  Asclepias speciosa Lowell Ahart 2013-6-11 18799 Butte About 150 yards east of the intersection of Forbestown Road and Black Bart Road, about 3 1/4 miles (air) southwest of Forbestown. 737 Comment
  CHSC10659  Aspidotis densa Lowell Ahart 1967-9-29 Sierra Near Sam's Camp. 2438 Comment
  CHSC32058  Aspidotis densa L. Ahart 1973-10-26 284 Sierra Near Alleghany. 1219 Comment
  JEPS113222  Aspidotis densa Lowell Ahart 2007-5-29 13966 Butte On the east side of Bald Rock Dome, Dome Trail at the Middle Fork of the Feather River, about 2 miles by the trail from the trail head which is 3/10 mile east of Bean Creek Road, about 2 1/2 miles (air) northeast of Big Bald Rock, about 16 1/2 miles (air) 608 Comment
  CDA30195  Aster eatonii L. Ahart, J. Dittes 2009-8-28 16353 Plumas On the north side of Forest Service Road 27N98, headwater of Clear Creek, about 2.0 miles (air) north of Butt Valley Reservoir Dam, about 3 miles (air) southwest of Lake Almanor Reservoir Dam Comment
  SEINET10473621  Aster exilis Lowell Ahart 1983-8-27 Ahart 4356 Sutter A little south of the Myers home, Myers Ranch, Sutter Buttes, west of Marysville. Valley Grassland; 50 m. 50 Comment
  CHSC63141  Astragalus bolanderi Lowell Ahart 1994-6-29 7420 Plumas East of Frenchman Hill, east of Oroville Quincy Highway, south-west of Bucks Lake. 1828 Comment
  JEPS107979  Astragalus canadensis var. brevidens Lowell Ahart 2005-7-31 12218 Nevada Track of the old gravel road over Donner Summit, about 200 yards southwest of the GPS location, southeast of the bridge on old Highway 80, southeast of Donner Pass and Donner Summit 2062 Comment
  JEPS104446  Astragalus clevelandii Lowell Ahart 2003-7-14 10403 Lake Along a small stream, on the w side of the second causeway going sw of Bartlett Springs Rd, Indian Valley Reservoir. 449 Comment
  SEINET10452225  Astragalus gambelianus Lowell Ahart 1985-3-22 Ahart 4847 Butte About 1/2 mile north-east of the West Branch Bridge across Lake Oroville, 1/4 mile east of Highway 70, north of Oroville. Comment
  JEPS113777  Athyrium filix-femina subsp. cyclosorum Lowell Ahart 2007-8-7 14410 Yuba Hampshire Creek Meadow, about 80 yards east of the dirt road, about 1 mile (air) east of Clipper Mills 1021 Comment
  CAS-BOT-BC68690  Athyrium filix-femina var. californicum Lowell Ahart 1983-9-21 4461 Butte 3 miles north of the Sly Creek Dam, north of the Strawberry Valley, along a small stream which is called French Creek 900 Comment
  CHSC100444  Athyrium filix-femina var. cyclosorum Lowell Ahart 2008-7-18 15138 Nevada About 50 yards south of Highway 20, south of the intersection of Highway 20 and Bowman Lake Road, southeast end of Bear Valley. 1439 Comment
  CHSC113835  Athyrium filix-femina var. cyclosorum Lowell Ahart 2014-9-9 19894 Plumas Below the high water line, on the sides of Sly Creek, Sky Creek Reservoir, about 7 miles (air) southwest of La Porte. 1069 Comment
  CHSC69103  Athyrium filix-femina var. cyclosorum Lowell Ahart 1997-8-1 7765 Butte On the east side of Little Kimshew Creek, where the basalt is eight sided, Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 Comment
  JEPS95303  Athyrium filix-femina var. cyclosorum Lowell Ahart 1994-7-28 7537 Plumas SW of Bucks Lake (NE of Frenchman Hill) 1706 Comment
  SBBG128606  Athyrium filix-femina var. cyclosorum L. Ahart 2008-8-14 15208 Plumas ca. 150 yards NE of logging rd (Forest Rd 22N68), W of the S Fork of the Feather River, ca. 0.5 mi SW of the Feather Fork Mine, ca. 1 mi NE of Little Grass Valley Reservoir 1600 Comment
  UCSB63847  Athyrium filix-femina var. cyclosorum Ahart, Lowell 1997-8-1 Butte On the east side of Little Kimshew Creek, where the basalt is eight sided, Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City; T25N, R5E, Section 33 1524 Comment
  CHSC116688  Athysanus pusillus Lowell Ahart; John Dittes 2016-4-29 20808 Tehama On the east side of the trail, about 100 yards south of the fish ladder on Deer Creek, about 0.8 mile (air) northeast of USFS Road 27N08 Bridge over Deer Creek, about 2 miles by trail to Highway 32. 935 Comment
  CHSC44481  Athysanus pusillus Lowell Ahart 1988-3-28 5948 Butte About 1/10 mile south of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles east of Feather Falls. 1280 Comment
  JEPS107360  Athysanus pusillus Lowell Ahart, Paul Maslin, John Dittes 2005-3-17 11667 Butte Big Chico Creek Ecological Reserve. Burned area, ca. 50 yd S of fence, on the E side of the poor dirt road, ca. 1/8 mi NW of the Indian Cave, ca. 3/4 mi W of Big Chico Creek, ca. 4 1/2 mi (air) NE of Chico 481 Comment
  JEPS116043  Athysanus pusillus Lowell Ahart, John Dittes 2009-3-20 15498 Butte Open area along the Guardian Rock Trail, about 150 yards southwest of the Ten Mile House Road Trail, about 300 yards west of Highway 32, west of the intersection of Highway 32 and Ten Mile House Road, Upper Bidwell Park, about 10 miles northeast of Chico 407 Comment
  JEPS118271  Athysanus pusillus Lowell Ahart, John Dittes 2011-6-20 17491 Lassen About 40 yards east of the stream, about 70 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CAS-BOT-BC17452  Athysanus pusillus Lowell Ahart 1987-5-22 5665 Butte About 0.25 mile southeast of Lumpkin Ridge Road, about 1.5 mile east of Camp 18, aobut 8 miles east of Feather Falls. 1280 Comment
  CHSC76091  Atriplex argentea var. mohavensis Lowell Ahart; Vernon Oswald 1999-9-13 8207 Lassen On the east side of the dirt road and 1/2 mile south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  CHSC94745  Atriplex argentea var. mohavensis Lowell Ahart 2006-9-26 13346 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  CAS-BOT-BC172672  Atriplex lentiformis Lowell Ahart 1987-10-22 5925 Butte About 150 yards west of the north entrance to the Oroville Wildlife Refuge, west of Pacific Heights Road, about 5 miles south-west of Oroville 38 Comment
  RSA769009  Atriplex prostrata L. Ahart 2009-11-12 16515 Mendocino South side of the Russian River, below the high water line of Lake Mendocino, about 200 yards south of Highway 20. 230 Comment
  HSC100788  Atriplex rosea Lowell Ahart, John Dittes 2008-8-21 15232 Merced 30 yd. SW of the wire gate on the S side of Sandy Mush Rd., 3.7 mi. W of Hwy. 99, ~8.5 mi. SSE of Merced 53 Comment
  JEPS114463  Atriplex rosea Lowell Ahart, John Dittes 2008-8-21 15232 Merced 30 yards southwest of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  SBBG128653  Atriplex rosea L. Ahart, J. Dittes 2008-8-21 15232 Merced 30 yards SW of wire gate on S side of Sandy Mush Rd, 3.7 mi W of Hwy 99, ca. 8.5 mi SSE of Merced 53 Comment
  SEINET13710039  Atriplex triangularis Lowell William Ahart, Lowell William Ahart 1999-1 8209 Lassen Honey Lake Wildlife Area, 5.5 Mi SE Standish Comment
  CAS-BOT-BC146134  Avena barbata Lowell Ahart 1982-4-23 3319 Sutter Sierra Nevada. West of the Myers Home, Myers Ranch, Sutter Buttes. 50 Comment
  CHSC10668  Avena barbata Lowell Ahart 1962-5-7 Butte Peter Ahart Ranch, Honcut. 39 Comment
  JEPS94141  Avena fatua Lowell Ahart 1998-6-9 7985 Butte ca. 7 mi. (air) n. Oroville (on e. side of Cherokee Rd., across the rd. from the cow chute, North Table Mt.); North Table Mt. 403 Comment
  CHSC34148  Azolla filiculoides L. Ahart 1981-9-27 3214 Butte Ca. 1/8 mi ne of jct of Lower Wyandotte Rd and Upper Palermo R, ca. 4 mi ne of Palermo. 80 Comment
  CHSC46166  Azolla filiculoides Lowell Ahart 1975-3-16 708 Placer About 1/2 mile north-east of the intersection of Wise Road and McCortney Road, north-east of Lincoln. 41 Comment
  JEPS124281  Azolla filiculoides Lowell Ahart 2015-11-18 20652 Butte About 2 miles southeast of intersection of Palm Avenue and Larkin Road, about 5 miles (air) northeast of Gridley. Comment
  CAS-BOT-BC98010  Baccharis pilularis Lowell Ahart 1986-10-16 5403 Butte about 1 mile south-west of the Ponderosa Dam, about 3 miles north-west of Forbestown 457 Comment
  CHSC46907  Baccharis salicifolia Lowell Ahart 1984-10-14 4814 Butte Along North Honcut Creek, about 3/4 mile north and 2 1/4 miles east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC32582  Bacopa eisenii L. Ahart 1979-9-27 2022 Butte About 1/2 mi w of Honcut along lower Honcut Rd. 33 Comment
  CHSC87367  Balsamorhiza sagittata Lowell Ahart 2004-5-3 10863 Nevada West of the large flat area on the west side of Washington Road, about 1 1/4 miles north of the intersection of Highway 20 and Washington Road, about 4 1/4 miles (by road) south of Washington. 1241 Comment
  CAS-BOT-BC16375  Barbarea orthoceras Lowell Ahart 1988-7-31 6162 Butte Along the north edge of the road, about 1 air mile north and a little east of Bald Mountain. 1524 Comment
  CHSC34114  Bassia hyssopifolia L. Ahart 1981-9-10 3148 Butte Along the edge of a ditch near the entrance to the Graylodge Waterfowl Mgmt HQ, w of Pennington Rd, ca. 12 mi sw of Gridley. 35 Comment
  CHSC113080  Beckmannia syzigachne Lowell Ahart; John Dittes 2013-7-22 18871 Lassen Drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99275  Beckmannia syzigachne Lowell Ahart; John Dittes 2008-6-20 14946 Lassen In swales, about 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC40919  Berberis aquifolium var. dictyota Lowell Ahart 1970-4-5 41 Butte Along Robinson Mill Road, north-east of Bangor. 457 Comment
  CHSC113619  Bergia texana Lowell Ahart 2014-8-31 19799 Butte On the west side of McCabe Creek, below the high water line of Lake Oroville, about 1/2 mile southwest of the Enterprise Bridge across the South Fork of the Feather River, about 11 miles (air) east of Oroville. 226 Comment
  SBBG128614  Bergia texana L. Ahart 2009-10-27 16485 Napa below the high water line of Lake Berryessa, ca. 100 yards E of Eticuera Crk, ca. 50 yards S of Eticuera parking Area at the NE end of the causeway, on the S side of Berryessa Knoxville Rd, ca. 20 mi NW of Winters 130 Comment
  JEPS107288  Betula occidentalis Lowell Ahart, John Dittes 2005-6-10 12072 Siskiyou On N side of the Shasta R., near rocky hillside N of the Shasta R., S of poor dirt road, ca. 50 yd NW of the pump house along the Shasta R., ca. 1.9 mi (air) S of Hwy 99/97 Cutoff, ca. 6 mi (air) east-SE of Grenada 776 Comment
  CHSC42992  Bidens cernua Lowell Ahart 1987-7-17 5824 Butte On a sand bar along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CDA42925  Bidens frondosa L. Ahart 2012-9-28 18458 Butte Just east of the east end of Sycamore Pool in Big Chico Creek, Lower Bidwell Park, Chico. Comment
  CHSC94573  Bidens frondosa Lowell Ahart 2006-9-11 13274 Butte South edge of the North Fork of the Feather River, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville. 431 Comment
  CHSC94892  Bidens frondosa Lowell Ahart 2006-9-28 13363 Butte On the east side of the North Fork of the Feather River, on the west side of Highway 70, about 50 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel. 445 Comment
  RSA726433  Bidens frondosa L. Ahart 2007-11-3 14570 Butte About 3/4 mile east of the Power House below Kuncke Reservoir, about 1.25 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise. 259 Comment
  CHSC111169  Bidens tripartita Lowell Ahart 2013-6-18 18802 Butte About 20 yards east of Parking Lot 16, Gray Lodge Wildlife Management Area, about 7 miles (air) southwest of Gridley. 19 Comment
  CAS-BOT-BC15807  Boechera arcuata Lowell Ahart 1983-5-28 4017 Butte 5.5 miles north of Feather Falls. At the overlook to Feather Falls. 600 Comment
  CHSC42747  Boechera breweri Lowell Ahart 1977-4-5 1258 Sutter On the west side of the South Butte, Sutter Buttes. 457 Comment
  CHSC77815  Boechera breweri subsp. breweri Lowell Ahart 2000-3-19 8322 Sutter Rock outcrops, on the west side of the North Butte, about 1/4 mile northwest of the Dean Place, Sutter Buttes. 274 Comment
  CHSC10614  Boechera breweri subsp. shastaensis Lowell Ahart 1968-3-17 Butte Bidwell Park, Chico. 91 Comment
  CHSC94236  Boechera constancei Lowell Ahart 2006-6-28 12874 Sierra Northwest slope of the serpentine area, about 3/4 mile (air) east of Lake Delahunty, about 2 miles (air) northeast of Gibsonville. 1835 Comment
  CHSC10726  Boechera pendulocarpa Lowell Ahart 1968-6-29 Plumas Near La Porte. 914 Comment
  CAS-BOT-BC14473  Boechera platysperma Lowell Ahart 1986-7-15 5365 Plumas Sierra Nevada. South Fork of the Feather River, ca. 1 mile southwest of Pilot Peak. 1828 Comment
  CHSC43440  Boechera suffrutescens Lowell Ahart 1977-7-15 1468 Sierra On the north side of Mount Fillmore, about 12 miles north-east of La Porte. 1828 Comment
  CHSC82542  Botrychium simplex var. compositum Lowell Ahart; John Dittes, Josephine Guardino 2002-7-2 9835 Plumas In a meadow, about 150 yards south of the road, about 3/4 mile west of Lumpkin Ridge Road, about 1 mile southeast of Tamarack Flat, about 2 miles (air) northwest of Little Grass Valley Reservoir dam, about 5 miles (air) northwest of La Porte. 1716 Comment
  UC1609476  Boykinia occidentalis Lowell Ahart 1993-7-22 7087 Butte about 6 (air) mi ne Feather Falls (on a steep bank along Fall River, about 200 yards w of the bridge across Fall River); along Fall River, ne of Feather Falls 1036 Comment
  CHSC107562  Brachypodium distachyon Lowell Ahart 2011-6-7 17422 Yuba West of a willow shrub, just south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  CHSC41414  Brassica nigra Lowell Ahart 1986-5-10 5273 Butte In a field, Peter Ahart Ranch, about 2 miles north and 1/4 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  JEPS122190  Brassica rapa Lowell Ahart 2014-4-16 19359 Butte On the sides but near the bottom of a large canal, about 100 yards north of East Gridley Road, on the west side of the Feather River, about 2 miles east of Gridley. Comment
  CHSC31618  Brickellia californica Lowell Ahart 1973-8-3 273 Butte Ahart Ranch. On gravel bars on North Honcut Creek. Peter Ahart Ranch, Honcut. 45 Comment
  JEPS127138  Brickellia californica Lowell Ahart, John Dittes 2016-8-25 21295 Tehama Anderson River Park, 0.7 mile (air) upstream from Stillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderson. Undesignated Section of San Buenaventura Land Grant. Comment
  SEINET10475007  Brickellia californica Lowell Ahart 1983-8-27 Ahart 4344 Sutter A little south of the Myers Ranch, ca. 1 mi south of the Myers home, Sutter Buttes, west of Marysville. Foothill Woodland; 50 m. 50 Comment
  JEPS102631  Brickellia greenei Lowell Ahart 2001-7-17 8931 Plumas Outcrops, on the SE side of a logging road, SE of a small branch of Butt Creek, about 2 1/2 miles (air) north of Humboldt Summit. 1828 Comment
  CAS-BOT-BC145431  Briza maxima Lowell Ahart 2007-5-14 13863 Yuba About 250 yards west of the power tower, power tower is about 30 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 35 Comment
  CHSC97655  Briza maxima Lowell Ahart 2007-5-14 13863 Yuba Bottom of a swale, about 250 yards west of the power tower, power tower is about 30 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 35 Comment
  CHSC90998  Briza minor Lowell Ahart 2005-4-14 11710 A Butte East of the railroad tracks, north of Spruce Street, Gridley. 28 Comment
  CHSC117268  Brodiaea coronaria Lowell Ahart; John Dittes 2016-7-15 21232 Lassen About 80 yards west of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  JEPS118413  Brodiaea purdyi Lowell Ahart 2011-7-23 17608 Nevada In the small meadow where there are two grave memorials, about 40 yards west of Bowman Lake road, about 1/8 mile west of the bridge across the South Fork of the Yuba River, about 1 mile (air) north of Highway 20 at the intersection of Bowman Lake Road 1379 Comment
  CHSC40272  Brodiaea sierrae Lowell Ahart 1985-6-30 5084 Butte Along the road to the Forbestown Res., about 2 1/2 miles north-east of Forbestown. 868 Comment
  RSA718343  Bromus carinatus L. Ahart 2006-6-9 12643 Butte Along the north side of the service road to Bardes Bar along the North Fork of the Feather River, about 70 yards east of the electric tower, on the east side of Highway 70, about 2 3/4 miles (air) southwest of Pulga. 535 Comment
  SEINET10507832  Bromus carinatus Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4706 Butte About 2 mi SW of Forbestown Diversion Dam, NE of Forbestown; Yellow Pine Forest; 700 m. 700 Comment
  CDA31576  Bromus carinatus var. carinatus L. Ahart 2004-7-23 11301 Butte North of the West Branch Campground, south of the Bridge across the West Branch of the Feather River, about 1 1/2 miles (air) west of Philbrook Reservoir Dam, about 3 3/4 miles (air) southeast of Butte Meadows. Comment
  CHSC84954  Bromus carinatus var. carinatus Lowell Ahart 2003-10-26 10682 Plumas On a gravel bar on the east side of the South Fork of the Feather River, where the old road crosses the river, about 1/8 mile west of the Feather Fork Mine, about 1 3/4 miles (air) northeast of Little Grass Valley Reservoir, about 6 1/2 miles (air) northeast of La Porte. 1600 Comment
  CHSC88195  Bromus carinatus var. carinatus Lowell Ahart 2004-7-27 11317 Plumas Along Hopkins Creek, about 200 yards north of the fork of Hopkins Creek and the East Branch of Hopkins Creek, about 3/4 mile south of Turkeytown, about 1 mile (air) southwest of Blue Nose Mountain, about 10 miles (air) northeast of La Porte. 1645 Comment
  CHSC44546  Bromus carinatus var. marginatus Lowell Ahart 1978-7-29 1793 Plumas About 1/2 mile north of the Bunker Hill Mine, about 12 miles north-east of La Porte. 1828 Comment
  SEINET10509555  Bromus caroli-henrici Lowell Ahart 1984-5-31 Ahart 4655 Butte On the Peter Ahart Ranch, ca. 1.3 mi N and 1/8 mi E of Honcut, ca. 12 mi S of Oroville; Valley Grassland; 50 m. 50 Comment
  CAS-BOT-BC156292  Bromus catharticus Lowell Ahart 1979-5-3 s.n. Butte Peter Ahart Ranch. Honcut. 50 Comment
  JEPS118468  Bromus catharticus Lowell Ahart 2011-5-9 17354 Butte South side of Palm Avenue, about 2 miles (air) southeast of East Biggs 29 Comment
  CHSC108086  Bromus ciliatus Lowell Ahart 2011-9-17 17658 Plumas On the south side of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 30 yards west of the paved road, about 1/8 mile west of Little Grass Valley Reservoir. 1595 Comment
  CHSC116648  Bromus diandrus Lowell Ahart; Josephine Guardino 2016-4-19 20790 Contra Costa Undesignated section of Canada de Los Vaqueros Land Grant. Along the sides ot the dirt roads, 1.8 miles (air) northwest of Los Vaqueros Reservoir Marina, 2.1 miles (air) southwest of Los Vaqueros Reservoir Dam, approximately 25 miles (air) southwest of Stockton. 160 Comment
  CHSC31701  Bromus diandrus L. Ahart 1975-5-12 761 Butte Along North Honcut Creek. Peter Ahart Ranch, Honcut. 45 Comment
  JEPS124415  Bromus diandrus Lowell Ahart 2015-6-6 20205 Butte About 5/8 mile northwest of the iron gate along Cherokee Road, Beatson Hollow, North Table Mountain, about 7 miles (air) north of Oroville. Comment
  CHSC101667  Bromus hordeaceus Lowell Ahart 2009-4-26 15638 Butte On the west side of Guardians Trail, just south of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC36546  Bromus hordeaceus L. Ahart 1982-6-4 3549 Butte On a lava cap, 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 1000 Comment
  RSA700239  Bromus inermis L. Ahart 2004-7-23 11307 Butte on the west side of Philbrook Reservoir Dam, about 3 3/4 miles (air) southeast of Butte Meadows. 1508 Comment
  JEPS110363  Bromus japonicus Lowell Ahart 2006-6-21 12823 Sierra On the north side of the road, about 2 miles (by road) west of Forest 1329 Comment
  RSA795663  Bromus japonicus L. Ahart 2012-7-1 18258 Plumas On the sides and in the gutter of the dirt road to the large pipe, about 0.25 miles east of Caribou Road, about 3.5 air miles northeast of Belden. 808 Comment
  CHSC37091  Bromus laevipes L. Ahart 1982-9-13 3806 Butte Along edges of wash that flows into Pinkard Creek, ca. 1/8 mi n of Lost Creek Reservoir Dam, ca. 2 and 1/8 mi nw of Strawberry Valley. 1100 Comment
  CHSC44544  Bromus laevipes Lowell Ahart 1977-7-26 1496 Plumas Along the old logging road to Bunker Hill Creek, about 1/2 mile north of the Bunker Hill Mine, about 10 miles north-east of La Porte. 1828 Comment
  CHSC61531  Bromus laevipes Lowell Ahart 1993-6-16 6967 Butte Along a dirt road, south-west of the intersection of Black Bart Road and Forbestown Road, about 3 1/2 (air) miles south-west of Forbestown. 609 Comment
  JEPS116075  Bromus laevipes Lowell Ahart 2009-5-30 15804 Butte On dry rocky soil, on the north side of Ten Mile House Road, just southeast of Guardians Trail, Upper Bidwell Park, about 1/4 mile west of the intersection of Highway32 and Ten Mile House Road, about 10 miles northeast of Chico 425 Comment
  SEINET10507667  Bromus madritensis Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4078 Butte T20N R5E sec 6. Along Bloomer Hill Rd, ca. 3/4 mi w of Oroville-Quincy Hwy, ca. 15 mi ne of Oroville. Foothill Woodland; 425 m. 425 Comment
  CHSC42847  Bromus madritensis subsp. madritensis Lowell Ahart 1987-5-6 5550 Butte Along the road, at the Poe Power House along the North Fork of the Feather River, about 2 miles south-east of Jarbo Gap. 283 Comment
  JEPS114675  Bromus madritensis subsp. rubens Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14639 Merced Grassy mounds, about 40 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CHSC99914  Bromus orcuttianus Lowell Ahart 2008-7-18 15126 Nevada Along the P. G. and E. water ditch at the 3 1/4 mile mark, about one mile southwest of Highway 20 (by ditch), about 1/2 mile south of Bear Valley. 1744 Comment
  JEPS115888  Bromus orcuttianus Lowell Ahart, John Dittes 2009-7-15 16092 Plumas On dry rocky soil, under the power line, on the south side of Forest Service Road 26N22, about 2.3 miles (air) southeast of Butt Valley Reservoir Dam 1517 Comment
  SEINET10662028  Bromus orcuttianus Lowell Ahart 2004-7-11 Ahart 11232 Butte T23N, R4E, southeast 1/4 Section 7. On the northeast edge of Paradise Lake, about 3/4 mile northeast of the picnic area, about 1 mile northeast of Paradise Dam, about 4 miles (air) southwest of Stirling City. 815 Comment
  CAS-BOT-BC161612  Bromus sterilis Lowell Ahart 1977-6-16 1474 Butte Peter Ahart Ranch, Honcut. North Honcut Creek. 50 Comment
  JEPS98689  Bromus suksdorfii Lowell Ahart 2000-7-28 8617 Nevada Moist area west of the small spring, on the south side of Fall Creek, about 200 yards east of where Fall Creek crosses Forest Highway 18, or Bowman Lake Road, about 5 miles (air) or 8 miles by road north of Highway 20 and Bear Valley. 1706 Comment
  CHSC112781  Bromus tectorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18751 Lassen Drainage filled with dirt from the construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC80715  Bromus tectorum Lowell Ahart 2001-6-14 8834 Tehama Northwest of the dirt road that leads to the tower, on the north side of road M2, about 8 miles west of Paskenta. 609 Comment
  RSA724972  Bromus tectorum L. Ahart 2006-6-15 12768 Glenn On the west side of the creek, about 30 yards south of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork campground, about 5 1/4 miles (air) west-northwest of Stonyford. 596 Comment
  CHSC80902  Bromus vulgaris Lowell Ahart 2001-7-19 8949 Plumas On the sides of Hopkins Creek, about 100 yards southwest of the East Branch of Hopkins Creek, about 1/2 mile (air) south of Turkey Town, about 2 1/2 miles (air) southeast of Pilot Peak. 1828 Comment
  CHSC61340  Bulbostylis capillaris Lowell Ahart 1993-7-29 7117 Butte About 2 1/2 mi NE of Bald Mountain, about 6 1/2 mi NE of Stirling City. 1584 Comment
  JEPS113695  Bulbostylis capillaris Lowell Ahart 2007-6-12 14073 Butte Along swales, in a large bare granite opening (about an acre in size), northeast of Little Bald Rock, about 300 yards east of Bean Creek Road, about 16 miles (air) northeast of Oroville 1009 Comment
  CHSC46479  Cakile maritima Lowell Ahart 1981-8-5 3020 San Francisco Near the edge of the bay, Presidio, north end of Crissy Field, about 1/4 mile east of the Golden Gate Bridge, San Francisco. 0 Comment
  CHSC59041  Calamagrostis canadensis Lowell Ahart 1992-7-26 6848 Butte Near a small stream, about 1/2 mile north of the Carr Mine, about 2 (air) miles south of Snow Mountain. 1767 Comment
  CHSC112207  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS114726  Calandrinia ciliata Lowell Ahart 2008-5-8 14719 Butte Below the high water line of Lake Oroville, about 300 yards south of the poor parking area, on the west side of McCabe Creek, about 3/4 mile southwest of the Enterprise Bridge, about 11 miles (air) east of Oroville 259 Comment
  CHSC78316  Calliscirpus brachythrix Lowell Ahart 2000-7-13 8591 Sierra On a upper west branch of Black Jack Ravine, on the west side of Forest Highway 98, Harris Meadow, about 7 miles (air) northeast of Alleghany. 1615 Comment
  CHSC96377  Callitriche marginata Lowell Ahart 2007-4-3 13611 Tehama In shallow water of a large vernal pool, east of the poor dirt road, about 4 1/2 miles (air) northeast of the intersection of Highway 99 East and Vina Road, about 6 1/2 miles (air) southeast of Los Molinos. 131 Comment
  CHSC81359  Callitriche stagnalis Lowell Ahart 2001-9-18 9283 Plumas In shallow water of Freeman Creek, on the strand of Lake Davis. 1761 Comment
  JEPS110511  Calocedrus decurrens Lowell Ahart 2006-9-28 13387 Plumas On the west side of the North Fork of the Feather River, on the west side of Highway 70, at Indian Jim Campground, about 3/4 mile southwest of Chambers Creek 646 Comment
  CAS-BOT-BC487816  Calochortus coeruleus Lowell Ahart 1970-5-19 s.n. Butte Along Doon Grade, near Paradise 914 Comment
  CHSC117360  Calochortus macrocarpus Lowell Ahart; John Dittes 2016-7-14 21151 Modoc South of a new pond, south of Ash Creek Canal (now filled in), south of Ash Creek, Ash Creek State Wildlife Area, 0.79 mile (air) south of County Road 87, 1.73 miles (air) west of Adin, Big Valley. 1273 Comment
  JEPS127301  Calochortus macrocarpus Lowell Ahart, John Dittes 2016-7-14 21151 Modoc South of Ash Creek, Ash Creek State Wildlife Area, 0.79 miles (air) south of County Road 87, 1.73 miles (air) west of Adin Big Valley. Comment
  CHSC101167  Calochortus superbus Lowell Ahart 2009-5-15 15680 Butte About 20 yards east of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 235 Comment
  CAS-BOT-BC494347  Calochortus tolmiei Lowell Ahart 1985-5-15 5000 Butte On dry rocky red serpentine soil, east of a small dry stream, 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow Res. 800 Comment
  CHSC99968  Calycadenia fremontii Lowell Ahart; John Dittes 2008-8-26 15331 Modoc On the sides of County Road 85a, 287 feet east of County Road 91, 7.7 miles (air) north-northeast of Lookout. 1303 Comment
  UC1563273  Calycadenia fremontii Lowell Ahart and Mary Sue Taylor 1990-8-28 6585 Butte 3 mi e, s side of Hwy 32 Chico 182 Comment
  SEINET11268342  Calycadenia multiglandulosa Lowell Ahart 2000-7-13 8581 Yuba On the south side of Ridge Road, about 1/4 mile west of Our House, about 2 miles (air) east of Celestial Valley, about 2 1/2 miles (air) southeast of Camptonville.; 0 975 Comment
  CAS-BOT-BC270005  Calycadenia multiglandulosa Lowell Ahart 1984-6-10 4687 Butte 1 mile SE of Hurleton. Along the edges of a subdivision road about 1 miles SE of Hurleton, 1/12 mile E of the Oak Grove Cemetary, about 10 miles E of Oroville 500 Comment
  CAS-BOT-BC106123  Calycadenia oppositifolia Lowell Ahart 1988-5-30 6033 Butte Along Poe Power House Road, about 1/10 mile north of the bridge across teh North Fork of the Feather River, 365 Comment
  CHSC40472  Calycadenia oppositifolia Lowell Ahart 1985-5-15 4979 Butte West of Lunt Road, about 1/2 mile north of the intersection of Lunt Road and Highway 70, north of Yankee Hill. 502 Comment
  CHSC91459  Calycadenia oppositifolia Lowell Ahart 2005-7-12 12136 Butte On the west side of Encina Grade Road (Bloomer Hill Road), about 2 miles (air) southeast of Bloomer Hill, about 2 miles west of Oroville Quincy Highway. 623 Comment
  SEINET10473678  Calycadenia oppositifolia Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4086 Butte T21N R5E sec 31. Along Bloomer Hill Rd, ca. 1.3 mi w of Oroville-Quincy Hwy, ca. 15 mi ne of Oroville. Foothill Woodland; 450 m. 450 Comment
  SBBG119738  Calycadenia pauciflora L. Ahart 2004-6-11 11015 Tehama Nomalaki Trail, ca. 100 yds N of Bowers Crk, ca. 0.75 mi NW of Forest Rd 23N69 (Mud Flat Rd), ca. 6.5 air mi SW of Paskenta 543 Comment
  CAS-BOT-BC270886  Calycadenia spicata Lowell Ahart 1981-8-31 3052 Butte W of Forbestown 750 Comment
  JEPS121137  Calypso bulbosa var. occidentalis Lowell Ahart, John Dittes, Josephine Guardino 2013-4-24 18568 Mendocino Redwood forest S of Mountain View Road, 1.9 air miles W of Boonville. Comment
  CHSC10553  Calyptridium umbellatum Lowell Ahart 1962-7-14 Placer French Meadows. 1676 Comment
  CHSC103117  Calystegia occidentalis subsp. occidentalis Lowell Ahart 2009-5-30 15775 Butte On the north side of Ten Mile House Road, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 379 Comment
  JEPS102308  Calystegia occidentalis subsp. occidentalis Lowell Ahart 2001-6-8 8770 Tehama 9 mi W of Paskenta (S side of road M2) 792 Comment
  CHSC63135  Calystegia occidentalis subsp. occidentalis Lowell Ahart 1994-6-27 7400 Yuba On dry red rocky soil, along the north side of a small stream, on the east bank of the logging road, east of Schwartz Meadow, on the east side of La Porte Road, about 4 miles north-east of Strawberry Valley. 1219 Comment
  CHSC111414  Camissonia contorta Lowell Ahart; John Dittes 2012-7-12 18355 Modoc In the parking area on the east side of Elkins Lane, northeast of the homestead, about 300 yards north of the bridge across Ash Creek, Ash Creek State Wildlife Area, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1295 Comment
  CHSC50051  Camissonia contorta Lowell Ahart 1990-3-28 6427 Butte In the borrow area, about 1/4 mile south of the Feather River, about 4/10 mile west of Pacific Heights Road, about 4 1/2 miles south-west of Oroville. 30 Comment
  CHSC112275  Campanula angustiflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC80625  Campanula griffinii Lowell Ahart 2001-6-8 8812 Tehama On the west side of road M2, about 9 miles W of Paskenta. 792 Comment
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Aug 3 2007
  JEPS102867  Campanula griffinii Lowell Ahart 2011-6-8 8812 Tehama On the W side of road M2, ca 9 miles W of Paskenta. 792 Comment
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Aug 3 2007
  JEPS104409  Campanula prenanthoides Lowell Ahart 2003-10-15 10638 Plumas Old gold mined flat area, ca 1/4 mi south of Forest Rd 22N94E, ca 1/2 mi south of Forest Rd 22N94, on Hartman Bar Ridge, ca 1 mi (air) sw of Franklin Hill, ca 4 1/2 mi (air) nw of Tamarack Flat, ca 9 mi (air) nw of La Porte. 1509 Comment
  CHSC42509  Capsella bursa-pastoris Lowell Ahart 1987-5-6 5510 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 274 Comment
  JEPS105938  Cardamine oligosperma Lowell Ahart 2004-3-26 10704 Butte On the south edge of the paved road, Hurleton Road, north of Forbestown Road, about 1/4 mile north of the Oak Grove Cemetery, about 2 miles southeast of Lake Wyandotte, about 10 miles east of Oroville 502 Comment
  SBBG128032  Cardamine oligosperma L. Ahart 2010-2-13 16566 Butte parking area, Peter Ahart Ranch, ca. 1.5 mi N and 1 mi E of Honcut, ca. 12 mi S of Oroville 33 Comment
  CHSC87347  Cardamine pachystigma var. pachystigma Lowell Ahart 2004-4-27 10767 Yuba About 20 yards north of a drainage, about 50 yards east of the road, about 1/2 mile (air) southeast of Woodleaf. 931 Comment
  JEPS120845  Cardamine pensylvanica Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18729 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC84057  Carduus pycnocephalus Lowell Ahart; John Dittes 2003-5-22 10185 Shasta Just west of the poor dirt road, about 150 yards south of the Coleman Canal, about 1 1/8 miles west of the barn, 4 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 11 miles (air) east-northeast of Cottonwood. 259 Comment
  JEPS98356  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2000-5-25 8402 Yuba 6 air miles S of Smartville (a north branch of Dry Creek, 100 yds W of Smartville Road, about 2 mi N of intersection of Waldo Road and Smartville Road) 146 Comment
  JEPS122028  Carex Lowell Ahart 2014-7-2 19537 Butte On the south side of the County Road, about one mile west of the intersection of County Road and Lumpkin Road, about 7 miles northeast of Feather Falls. Comment
  CHSC87980  Carex abrupta Lowell Ahart; John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11172 Plumas In a small meadow, on the north side of a forest road, about 1/4 mile north of Taylor rock, about 1 mile (air) southwest of Grizzly Peak, about 5 miles (air) south of Taylorsville, about 8 miles (air) northeast of Quincy. 2139 Comment
  CHSC103110  Carex amplifolia Lowell Ahart 2009-6-30 15974 Butte On the bottom of a deep ditch, on the east side of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 209 Comment
  CHSC44438  Carex amplifolia Lowell Ahart 1988-6-29 6100 Butte Along a small branch of Bean Creek Road, about 3/4 mile south-east of Little Bald Rock. 944 Comment
  CHSC106356  Carex angustata Lowell Ahart 2010-7-27 16931 Plumas North side of Forest Road 22N68, about 150 yards north of the South Fork of the Feather River, about 1/4 mile southwest of the Feather Fork Mine, about 1 1/2 miles (air) northeast of Little Grass Valley Reservoir. 1634 Comment
  CHSC113952  Carex angustata Lowell Ahart 2014-7-13 19643 Butte West part of a large wet meadow (some bog), about 10 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1638 Comment
  JEPS106369  Carex angustata Lowell Ahart 2004-8-2 11327 Butte Small bog in a large meadow, about 200 yards east of Keyser Creek, on the north side of the dirt County Road, about 3/4 mile (air) northeast of Oak Point, about 1/2 mile (air) west of Big Kimshew Creek, about 1 3/4 miles southeast of Bald Mountain 1452 Comment
  CHSC117018  Carex athrostachya Lowell Ahart 2016-6-6 20964 Modoc About 100 yards east of the Parking Area, about one miles south of the intersection of County Road 87 and Access Road to Pilot Butte Parking Area, 3.8 miles (air) east of Lookout, 7.5 miles (air) west of Adin, Ash Creek State Wildlife Area. 1271 Comment
  SEINET4292089 Image available Carex athrostachya L. Ahart, Dittes, J 2005-1 12397 Plumas Red Fir Forest. Below the high water line of Taylor Lake, on the northeast side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake. Comment
  SEINET7550687 Image available Carex athrostachya Lowell Ahart, Josephine Guardino 2005-8-9 12269 Plumas In a small drainage that runs into Fant Creek, west of the meadow, about 250 yards southwest of Fant Creek and the corral, north of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1597 Comment
  CHSC94099  Carex aurea Lowell Ahart 2006-7-9 12915 Plumas Small bog or wet meadow, below the basalt gravel road, about 2 miles (air) west of Tamarack Flat, about 4 miles (air) northwest of Little Grass Valley Reservoir. 1648 Comment
  CAS-BOT-BC19380  Carex barbarae Lowell Ahart 1986-5-24 5296 Sutter About 0.5 mile south of the Dean Cabin, Dean Ranch, about 3.25 miles NW of Sutter, Sutter Buttes. 243 Comment
  JEPS127327  Carex canescens subsp. canescens Lowell Ahart 2016-6-29 21078 Plumas About 20 yards east of Forest Service Road 22N72, about 1/4 mile southeast of Table Mountain, about 1 3/4 miles (air) northwest of Tamarack Flat, about 3 3/4 miles (air) northwest of Little Grass Valley Reservoir Dam. Comment
  CHSC94326  Carex capitata Lowell Ahart 2006-7-19 13051 Tehama In the center of a bog, about 50 yards east of the abandoned logging road, about 200 yards northeast of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 1/8 miles (air) northeast of Butte Meadows. 1540 Comment
  CHSC107598  Carex cyrtostachya Lowell Ahart 2011-7-9 17574 Butte Southeast edge of a large open bare granite area, about 3/8 mile east of Little Bald Rock, about 2 miles (air) southeast of Brush Creek, about 15 miles (air) northeast of Oroville. 974 Comment
  CHSC71195  Carex densa Lowell Ahart 1998-6-9 7989 Butte Southwest of the lone oak tree, northwest of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  CHSC80566  Carex densa Lowell Ahart 2001-5-18 8743 Sutter Small ditch, south of a deep drainage ditch, on the east side of Pennington Road, 6 miles west of Live Oak. 22 Comment
  JEPS116021  Carex densa Lowell Ahart 2009-6-3 15816 Butte About 100 yards west of the table at the old homestead and southwest of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 239 Comment
  JEPS114930  Carex deweyana subsp. leptopoda Lowell Ahart 2008-7-16 15082 Plumas Forest floor, in a small seep, east of a small meadow (swamp), about 100 yards north of the paved road, about 1/4 mile west of the bridge where the South Fork of the Feather River flows into Little Grass Valley Reservoir, about 2 1/2 miles (air) north of 1597 Comment
  CHSC111961  Carex divulsa subsp. divulsa Lowell Ahart 2012-5-25 18113 Butte On dry good soil, not maintained lawn, NW of intersection of W. Frances Willard Ave. and Arcadian Ave., 1 block so. of Chico High School, Chico. 59 Comment
  CHSC105511  Carex fracta Lowell Ahart 2010-9-21 17199 Butte On damp humus, under red firs, about 50 yards east of the poor dirt road, about 100 yards west of Big Kimshew Creek, about 1 1/2 miles (air) northeast of Jones Meadow, about 2 1/2 miles (air) southeast of Philbrood Reservoir. 1917 Comment
  CHSC78177  Carex gracilior Lowell Ahart 2000-5-18 8374 Butte On the bottom of the Clay Pit, near the cottonwood trees, about 1/8 mile west of the Oroville Airport and Larkin Road, about 4 1/2 miles (air) sothwest of Oroville. 36 Comment
  JEPS116059  Carex gracilior Lowell Ahart 2009-6-18 15911 Butte On the banks of a small wash, about 60 yards west of the dredger piles along North Honcut Creek, about 2 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville 59 Comment
  SEINET10587563  Carex gracilior Lowell Ahart 2000-5-18 Ahart 8374 Nevada T19N, R3E, southwest 1/4 Section 23. On the bottom of the Clay Pit, near the Cottonwood trees, about 1/8 mile west of the Oroville Airport and Larkin Road, about 4 1/2 miles (air) southwest of Oroville. 37 Comment
  CHSC61885  Carex heteroneura var. heteroneura Lowell Ahart 1993-9-10 7201 Sierra Meadow, about 1/4 mile south of where the poor dirt road ends at the stream, camp and water ditch, on the north side of Mount Fillmore, about 1 mile southwest of the dirt road from Gibsonville to Johnsville. 2225 Comment
  CAS-BOT-BC28191  Carex hirtissima Lowell Ahart 1982-6-1 3529 Butte A little S of the intersection of Black Bart Road and forbestown Road, W of Forbestown. 750 Comment
  JEPS104243  Carex hirtissima Lowell Ahart 2003-7-6 10359 Yuba In meadow, e of the power line, ca 60 yd nw of Fountain Hill Rd, ca 5 mi (air) n of Dobbins. 836 Comment
  JEPS87733  Carex hirtissima Lowell Ahart 1994-6-27 7386 Yuba ca. 4 mi. n.e. Strawberry Valley (s. side of small stream, e. of logging rd., e. of Schwartz Meadow, on e. side of La Porte Rd.) 1219 Comment
  JEPS128602  Carex integra Lowell Ahart, John Dittes 2017-7-20 21637 Nevada In meadow west of Prosser Creek, south side of Carpenter Valley, about 200 yards north of the poor dirt road, about 4 miles (air) west x southwest of Hobart Mills, about 5.2 miles (air) northwest of Truckee, southeast corner of Carpenter Valley. Comment
  JEPS114929  Carex jonesii Lowell Ahart 2008-7-16 15085 Plumas On the west side of a small stream, about 150 yards north of the paved road, about 1/4 mile west of the bridge where the South Fork of the Feather River flows into Little Grass Valley Reservoir, about 2 1/2 miles (air) north of La Porte 1597 Comment
  CHSC113458  Carex laeviculmis Lowell Ahart 2014-7-10 19610 Butte South of the intersection of Humbug Road and Philbrook Road, about 2 miles (air) northwest of Philbrook Reservoir. 1597 Comment
  CHSC34168  Carex laeviculmis Lowell Ahart 1981-9-15 3171 Butte Swamp, where the road forks and crosses French Creek, ca. 1 mi w of Sly Creek Reservoir. 1300 Comment
  CAS-BOT-BC31105  Carex lemmonii Lowell Ahart 1982-7-28 3725 Sierra Along the dirt road N of the Pacific Mine, ca 5 mi E of La Porte. 1700 Comment
  UC1609198  Carex lemmonii Lowell Ahart 1993-6-26 7007 Butte about 1/4 mi w Lost Creek Reservoir (on the s side of the dirt road) 1036 Comment
  SEINET13709890  Carex lenticularis Lowell William Ahart, Lowell William Ahart 2003-1 10431 Plumas 5 Mi. NW of La Porte (39 Deg 44'34.8"N, 121 Deg 02'20.8"W) 5679 Ft. 1731 Comment
  CHSC100343  Carex lenticularis var. impressa Lowell Ahart 2008-8-14 15204 Plumas Wet meadow area with a small stream, just northwest of the culvert, on the northwest side of the good logging road (Forest Road 22N68), west of the South Fork of the Feather River, about 1/2 mile southwest of the Feather Fork Mine, about 1 mile northeast of Little Grass Valley Reservoir. 1600 Comment
  JEPS118435  Carex lenticularis var. impressa Lowell Ahart 2011-9-23 17706 Sierra Growing around small cobbles on the south side of Pass Creek, south of Hennas Pass Road, west of French Meadow, east of Forest Road 70, about 3 miles (air) northwest of Webber Lake 2015 Comment
  CHSC92290  Carex multicaulis Lowell Ahart; Josephine Guardino 2005-8-10 12307 Plumas Along a poor logging road, northeast of a small branch of Lights Creek, east side of Forest Road 27N54, about 5 1/2 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1821 Comment
  CHSC102643  Carex nebrascensis Lowell Ahart; John Dittes, Josephine Guardino 2009-7-22 16139 Plumas On the west side of Forest Service Road 27NO2K, east side of Long Valley, about 3.5 miles (air) west-southwest of Greenville, about 5.2 miles (air) southeast of Lake Almanor Dam. 1606 Comment
  JEPS110307  Carex nebrascensis Lowell Ahart 2006-7-19 13025 Tehama In a small bog, in a meadow, south of an open dry flat, about 100 yards west of the dirt road, east of Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows 1525 Comment
  JEPS110343  Carex nebrascensis Lowell Ahart 2006-7-19 13039 Tehama Small meadow, east side of the abandoned logging road, about 150 yards northeast of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 1/8 miles (air) northeast of Butte Meadows 1540 Comment
  JEPS114853  Carex nebrascensis Lowell Ahart, John Dittes 2008-6-22 15019 Lassen N side of levee, about 90 yds E of the tall poles, in Big Valley, about 3.5 mi NE of the Headquarters at Ash Creek State Wildlife Area, about 5.5 mi (air) NE of Bieber 1260 Comment
  CHSC87219  Carex praegracilis Lowell Ahart 2004-4-4 10728 Butte In a pasture, on the north side of Richvale Highway, about 1/2 mile east of Richvale. 32 Comment
  JEPS117598  Carex praegracilis Lowell Ahart, John Dittes 2010-7-30 16953 Siskiyou About 50 yards west of the East Louie Road Bridge, about 30 yards west of the Shasta River, Shasta Big Springs Ranch, 1.6 miles (air) southwest of Big Springs Lake, 4.6 miles (air) northwest of Dwinnel Dam, 5.7 miles (air) southeast of Grenada 716 Comment
  CHSC94852  Carex serratodens Lowell Ahart 2006-6-11 12669 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  RSA755320  Carex sheldonii L. Ahart, John Dittes 2008-6-21 15012 Modoc Edge of a large pond, north of a large levee, mountain meadow, in Big Valley, about 4.3 air miles northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.3 air miles northeast of Bieber. 1267 Comment
  CHSC94372  Carex simulata Lowell Ahart 2006-7-19 13037 Tehama Small meadow, east of the abandoned logging road, about 150 yards northeast of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 1/8 miles (air) northeast of Butte Meadows. 1540 Comment
  CHSC105835  Carex subfusca Lowell Ahart 2010-7-27 16926 Plumas On the north side of the paved road, about 1/2 mile north of Goat Mountain, about 3 miles (air) northeast of La Porte. 1680 Comment
  CHSC110386  Carex subfusca Lowell Ahart 2012-9-5 18443 Plumas Along the east side of the South Fork of the Feather River, about 2/3 mile (air) southwest of Pilot Peak, about 9 miles (air) northeast of La Porte. 1940 Comment
  CHSC88229  Carex subfusca Lowell Ahart 2004-7-27 11313 Plumas At the fork of Hopkins Creek and the East Branch of Hopkins Creek, about 3/4 mile south of Turkeytown, about 1 mile (air) southwest of Blue Nose Mountain, about 10 miles (air) northeast of La Porte. 1645 Comment
  CHSC94720  Carex subfusca Lowell Ahart 2006-6-15 12762 Glenn On the west side of the creek, about 400 yards north of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford. 595 Comment
  JEPS107616  Carex subfusca Lowell Ahart, Josephine Guardino 2005-8-9 12291 Plumas On the bottom of Fant Creek, about 150 yards northwest of the cabin (destroyed) and corral, north of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake 1597 Comment
  JEPS107625  Carex subfusca Lowell Ahart, Josephine Guardino 2005-8-9 12273 Plumas In a small drainage that runs into Fant Creek, west of the meadow, about 200 yards southwest of Fant Creek and the corral, north of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake 1597 Comment
  JEPS113825  Carex subfusca Lowell Ahart, Josephine Guardino 2007-7-21 14356 Plumas Near a spring, open dry flat, south of the dirt road, about 1/2 mile (air) south of Bagley Pass, about 400 yards north of Lake Davis 1787 Comment
  JEPS117654  Carex subfusca Lowell Ahart 2010-7-27 16924 Plumas On the south side of the paved road, about 1/2 mile south of Goat Mountain, about 2 miles (air) northeast of La Porte 1656 Comment
  CHSC115777  Carex utriculata Lowell Ahart; John Dittes 2015-8-6 20517 Tehama About 100 yards east of the sping, east of the camping area, west side Childs Meadow, 0.67 air-miles west of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.21 air-miles southeast of Doe Mt., 10.41 air-miles south of Lassen Peak. 1498 Comment
  CHSC117728  Carex utriculata Lowell Ahart 2016-8-30 21324 Plumas On the southeast side of the pond, about 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, about 1 1/2 miles (air) southeast of Pilot Peak. 2044 Comment
  CHSC115357  Castilleja affinis subsp. affinis Lowell Ahart 2015-3-24 19958 Butte Along the Humboldt Trail, southeast part of Upper Bidwell Park, about 450 yards north of where the trail comes out to the old road and Highway 32, about 6 miles (air) northeast of Chico. 377 Comment
  CAS-BOT-BC249584  Castilleja applegatei subsp. pinetorum Lowell Ahart 1983-6-30 4177 Butte About 1 1/2 miles north-east of Concow Res. 550 Comment
  HSC97047  Castilleja applegatei subsp. pinetorum L. Ahart 2006-6-28 12879 Sierra About 3/4 mi. E of Lake Delhunty, about 2 mi. NE of Gibsonville 1904 Comment
  JEPS124299  Castilleja applegatei subsp. pinetorum Lowell Ahart 2015-4-13 20036 Butte About 3 miles (air) north of Jarbo Gap, about 17 1/2 miles (air) north of Oroville. Comment
  SBBG128287  Castilleja applegatei subsp. pinetorum L. Ahart, J. Dittes 2009-7-15 16095 Plumas under the power line, on the S side of Forest Service Rd 26N22, ca. 2.3 mi SE of Butt Valley Reservoir Dam 1517 Comment
  CHSC61015  Castilleja campestris subsp. campestris Lowell Ahart 1993-5-17 6950 Butte On the west side of Dunstone Road, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. 60 Comment
  CHSC116613  Castilleja exserta subsp. exserta Lowell Ahart; Josephine Guardino 2016-4-19 20779 Contra Costa Undesignated section of Canada de Los Vaqueros Land Grant. 1.8 miles (air) northwest of Los Vaqueros Reservoir Marina, 2.1 miles (air) southwest of Los Vaqueros Reservoir Dam, approximately 25 miles (air) southwest of Stockton. 160 Comment
  CDA41243  Castilleja lacera L. Ahart 2005-7-13 12146 Butte About 10 yards east of the intersection of Forbestown Road and Black Bart Road, about 3 1/2 miles (air) southwest of Forbestown, about 12 miles (air) east of Oroville. Comment
  CHSC115264  Castilleja lacera Lowell Ahart 2015-5-27 20193 Butte In a small dry meadow, about 100 yards south of the intersection of Forbestown Road and Black Bart Road, about 3 miles (air) southwest of Forbestown, about 11 miles (air) east of Oroville. 752 Comment
  JEPS126522  Castilleja lacera Lowell Ahart, John Dittes 2016-6-7 20993 Lassen West of pond, 110 yards east of the Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  GH395191  Castilleja lacera L. Ahart 2015-5-27 20193 Unknown in a small dry meadow, about 100 yards south of the intersection of Forbestown Road and Black Bart Road, about 3 miles (air) southwest of Forbestown, about 11 miles (air) east of Oroville. T19N, R6E, southeast 1/4 Section 18 Comment
  JEPS95833  Castilleja miniata subsp. miniata Lowell Ahart 1999-7-15 8094 Plumas about 50 yards east of the Quincy La Porte Road; about 3/4 mile south of Onion Valley; about 1 mile northwest of Pilot Peak; about 9 miles (air) northeast of La Porte 1828 Comment
  RSA0037005  Castilleja pilosa Lowell A. Ahart, John Dittes 2008-6-19 14879 Lassen East bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS124197  Castilleja pruinosa Lowell Ahart 2015-4-13 20035 Butte About 3 miles (air) north of Jarbo Gap, about 17 1/2 miles (air) North of Oroville Comment
  GH395194  Castilleja pruinosa L. Ahart 2015-4-13 20035 Unknown on the southwest side of Rim Road, about 3 miles (air) north of Jarbo Gap, about 17 1/2 miles (air) north of Oroville. T22N, R4E, northeast 1/4 Section 12 907 Comment
  GH395196  Castilleja pruinosa L. Ahart 2015-5-9 20183 Unknown on the north side of the Canyon Creek Trail, trail on the north side of the North Fork of the Yuba River, about 1/2 mile west of Highway 49, about 1 1/2 miles west of Indian Valley. T19N, R9E, northwest 1/4 Section 18 692 Comment
  CHSC61799  Castilleja tenuis Lowell Ahart 1993-9-24 7261 Sierra On the south side of Pearson Ravine, about 1/10 mile south of the dirt road from Gibsonville to Jonesville, at the very base and on the north side of Mount Fillmore. 1981 Comment
  JEPS113585  Castilleja tenuis Lowell Ahart, Josephine Guardino 2007-7-20 14351 Plumas Strand of Lake Davis, about 100 yards southeast of Long Point, northeast side of Lake Davis 1763 Comment
  JEPS113804  Castilleja tenuis Lowell Ahart, John Dittes, Josephine Guardino 2007-6-8 14026 Plumas Strand of Lake Davis, southeast of the end of the road, north end of Lake Davis 1763 Comment
  JEPS115511  Castilleja tenuis Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16328 Tehama About 100 yards east of Forest Service Road 29N25A, Childs Meadows, about 2600 feet south of the intersection of Highway 36 (89) and Forest Service Road 29N25A, 2.3 miles (air) northeast of the town of Mill Creek, 9.1 miles (air) south of Lassen Peak. Are 1493 Comment
  JEPS121112  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC40338  Ceanothus cuneatus Lowell Ahart 1985-3-4 4845 Butte Found growing on red rocky soil near Kunkle Res., about 2 miles south of Paradise. 550 Comment
  CHSC40677  Ceanothus cuneatus Ahart; Jokerst 1985-3-24 4865 Butte Found growing on damp bare serpentine west of Lunt Road, about 1/2 mile north of the intersection of Lunt Road and Highway 70, north of Yankee Hill. 550 Comment
  CHSC101156  Ceanothus integerrimus Lowell Ahart 2009-5-15 15693 -A Butte On the south side of Ten Mile House Road, Upper Bidwell Park, about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 311 Comment
  RSA718378  Ceanothus integerrimus L. Ahart 2006-6-24 12860 Butte Dirt road (Ponderosa Way), at an intersection, a gated road goes NW on Cohasset Ridge, 3 3/4 miles (air) NE of Cohasset. 1128 Comment
  CHSC46506  Ceanothus integerrimus var. californicus Lowell Ahart 1979-7-15 1964 Sierra South of the Johnsville Road, south-east of Stafford Mountain, about 1 mile east of Mount Etna. 1828 Comment
  CHSC96989  Ceanothus prostratus Lowell Ahart; Lawrence Janeway 2007-7-10 14282 Butte On the north side of Forest Road 21N31Y, about 6/10 mile west of Bald Rock Road, about 17 miles (air) northeast of Oroville. 1032 Comment
  RSA769802  Celtis australis L. Ahart, John Dittes, Josephine Guardino 2008-11-8 15425 Butte Southeast side of Cedar Grove, Lower Bidwell Park, Chico 67 Comment
  UC2026879  Celtis australis Lowell Ahart, Susan Bazell, Josephine Guardino, Wes Dempsey 2012-7-5 18264 Butte Cedar Grove, parking area, Lower Bidwell Park, Chico. Comment
  RSA767682  Centaurium exaltatum L. Ahart, John Dittes 2010-8-31 17125 Modoc Edge of a pond, about 400 yards west of Elkin s Lane and the bridge across Ash Creek, Ash Creek State Wildlife Area, about 4.3 air miles west of Adin, about 7.7 air miles northeast of Bieber, Big Valley. 1268 Comment
  JEPS94760  Centaurium venustum Lowell Ahart 1998-6-3 7969 Butte about 7 air mi n of Oroville (about 1/4 mi n of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain, Cherokee Road 403 Comment
  RSA0118782  Centromadia pungens subsp. pungens Lowell A. Ahart, John Dittes 2013-7-25 18957 Modoc Along the north-south fence, south edge of Ash Creek Floodplain, northwest of Patterson Homestead, east of Elkins Lane, 1.0 mile (air) south of County Road 87, 3.14 miles (air) west of Adin, Big Valley. 1268 Comment
  UC1609087  Centunculus minimus Lowell Ahart 1993-5-17 6953 Butte 1 1/2 mi. n. & 3 mi. e. Honcut (ca. 12 mi. s.e. of Oroville, on w. side of Dunstone Rd.) 60 Comment
  SEINET10971587  Cephalanthera austiniae Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4709 Butte About 2 mi SW of Forbestown Diversion Dam, NE of Forbestown; Yellow Pine Forest; 700 m. 700 Comment
  CAS-BOT-BC222890  Cephalanthus occidentalis Lowell Ahart 1982-6-20 3643 Sutter About 1/4 mile south-east of the Dean Cabin, Dean Ranch, Sutter Buttes 300 Comment
  CHSC102618  Cephalanthus occidentalis var. californicus Lowell Ahart 2009-7-9 16019 Butte On the east side of Big Chico Creek, about 50 yards west of Ten Mile House Road, Upper Bidwell Park about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 203 Comment
  CHSC10648  Cerastium glomeratum Lowell Ahart 1969-3-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC90338  Cerastium glomeratum Lowell Ahart 2005-3-11 11605 Yuba In the middle of the poor dirt road, west of a large rock outcrop, about 1/2 mile west of Marysville Road, about 1/2 mile north of Parking Area 3, Daugherty Hill Wildlife Area, Donovan Hill Management Area, about 1/2 mile north of Loma Rica Road, about 5 miles (air) northeast of Loma Rica. 386 Comment
  JEPS122281  Cerastium glomeratum Lowell Ahart 2014-4-15 19355 Butte Below the high water line of Lake Oroville, about 400 yards west of the old road, about 3 1/2 miles (air) northeast of Oroville Dam. Comment
  CAS-BOT-BC388443  Cerastium glomeratum Lowell Ahart 1981-3-14 2703 Sutter Dean Ranch, Sutter Buttes 350 Comment
  CHSC100419  Cercocarpus betuloides var. macrourus Lowell Ahart; John Dittes 2008-8-26 15357 Modoc Southeast side of Rose Creek, 750 feet southwest of confluence of Rose Creek and Pit River, on the southeast side of unnamed road, 2660 feet east of intersection with County Road 85a, 0.3 miles (air) north-northeast of Lookout. 1276 Comment
  CDA34263  Chamaesyce maculata L. Ahart 2010-6-25 16838 Butte In the parking area of Bidwell Mansion, Chico. Comment
  CHSC69139  Chamaesyce maculata Lowell Ahart 1997-8-7 7806 Yuba On the north side of New York Flat Road, about one mile northwest of La Porte Road, about 1 mile north of Brownsville. 731 Comment
  CHSC94599  Chamaesyce maculata Lowell Ahart 2006-9-11 13284 Butte South edge of the North Fork of the Feather River, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville. 431 Comment
  CHSC112596  Chamaesyce ocellata subsp. ocellata Lowell Ahart 2013-9-5 19021 Butte On the west side of La Porte Road, about 1/4 mile southwest of Dunstone Drive, about 2 1/3 miles (air) northeast of Honcut. 40 Comment
  JEPS98575  Chamaesyce ocellata subsp. ocellata Lowell Ahart 2000-6-11 8469 Yuba 6 mi (air) S of Smartville (W side of Smartville Road, 2 mi N of int. with Waldo Road) 152 Comment
  RSA755772  Chamaesyce ocellata subsp. ocellata L. Ahart 2009-8-15 16284 Butte Road edges, Peter Ahart Ranch, about 1.5 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 34 Comment
  CDA34731  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart, John Dittes 2010-8-3 17054 Modoc About 10 yards west of the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC102530  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2009-10-27 16486 Napa Below the high water line of Lake Berryessa, about 100 yards east of Eticuera Creek, about 50 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of Winters. 130 Comment
  CHSC43335  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Thomas Howell 1974-7-9 533 Lassen Along the edge of road A1, about 4 miles north-west of Susanville. 1584 Comment
  CHSC97689  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2007-11-3 14564 Butte Below the high water line of Lake Oroville, about 3/4 mile east of the Power House below Kunckle Reservoir, about 1 1/4 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise. 259 Comment
  JEPS106057  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2004-6-18 11090 Glenn Gravel bar on the north side of Salt Creek, south of the bridge across Salt Creek, on the south side of Newville Road, about 1/4 mile west of Newville, about 5 miles (air) west of Black Butte Reservoir 203 Comment
  JEPS115779  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2009-10-27 16486 Napa Below the high water line of Lake Berryessa, about 100 yards east of Eticuera Creek, about 50 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of Winte 130 Comment
  SBBG128691  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart 2009-10-12 16437 -A Napa below high water line of Lake Berryessa, along Capell Crk NE of Rest Area, 3/4 mi NE of Hwy 128 on Berryessa Knoxville Rd, 3/4 mi SW of Capell Cove Launch Ramp on Berryessa Knoxville Rd, ca. 19 mi (air) W of Winters 133 Comment
  SEINET13709719  Chamaesyce serpyllifolia Lowell William Ahart, Lowell William Ahart 1984-1 4785 Butte 5 Mi. SW Oroville Comment
  CHSC80573  Cheilanthes intertexta Lowell Ahart 2001-6-14 8842 Tehama A large rock outcrop, about 100 yards northeast of road M2, and east of the poor dirt road that is used to service the power poles, about 8.5 miles west of Paskenta. 2695 Comment
  CHSC69513  Chenopodium album Lowell Ahart 1997-9-11 7911 Plumas On the east side of Caribou Road, on the east side of the North Fork of the Feather River, at the elevated siphon, about 2 miles (air) northeast of Belden. 731 Comment
  CHSC99959  Chenopodium album Lowell Ahart; John Dittes 2008-8-25 15276 Modoc On the west bank (flood plane) of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout. 1273 Comment
  SEINET10479005  Chenopodium album Lowell Ahart 1990-9-30 Ahart 6609 Butte On the south side of the East Fork of Canyon Creek, below the high water line of Lake Oroville, about 1/8 mile north-west of the Canyon Creek Bridge across Lake Oroville. Foothill Woodland (destroyed). T20N R5E SW/S16. 244 Comment
  JEPS102856  Chenopodium ambrosioides Lowell Ahart 2001-10-8 9331 Plumas Sand bar, on the west side of Indian Creek, about 400 yards south of ArlingtonRoad, about 200 yards east of Highway 89, about 1 1/2 miles south of Crescent Mills. 1066 Comment
  JEPS95916  Chenopodium ambrosioides var. ambrosioides Lowell Ahart 1999-8-22 8183 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  JEPS115848  Chenopodium pumilio Lowell Ahart 2009-10-12 16443 Napa Below the high water line of Lake Berryessa, along Capell Creek northeast of Rest Area, 3/4 mile northeast of Highway 128 on Berryessa Knoxville Road, 3/4 mile southwest of Capell Cove Launch Ramp on Berryessa Knoxville Road, about 19 miles (air) west of 437 Comment
  JEPS95162  Chenopodium strictum var. glaucophyllum Lowell Ahart 1997-8-13 7857 Nevada about 1.5 mi w of Penn Valley (along the n side of Penn Valley Road, just w of intersection of Pleasant Valley Road and Penn Valley Road, just s of Hwy 20); Penn Valley Road 426 Comment
  JEPS117271  Chlorogalum angustifolium Lowell Ahart 2010-5-14 16639 Butte Along the east side of the poor dirt road, parking area, about 100 yards north of the entrance to the Disc Golf Area, west side of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico 394 Comment
  CHSC91466  Chlorogalum pomeridianum var. pomeridianum Lowell Ahart 2005-7-13 12148 Butte About 20 yards east of the intersection of Forbestown Road and Black Bart Road, about 3 1/2 miles (air) southwest of Forbestown, about 12 miles (air) east of Oroville. 759 Comment
  RSA695408  Chondrilla juncea L. Ahart 2003-6-30 10331 Butte Near water pipe where it comes out of the mountain, on north side of the Ponderosa Reservoir, about 2 air miles north of Forbestown. 481 Comment
  CAS-BOT-BC257036  Chorizanthe membranacea Lowell Ahart 1984-5-21 4629 Sutter On the south side of the South Butte, Sutter Buttes 600 Comment
  CHSC45496  Chorizanthe polygonoides Lowell Ahart 1978-5-23 1742 Tehama Along the Hogsback Road, east of Red Bluff. 182 Comment
  RSA768849  Chrysothamnus nauseosus subsp. albicaulis L. Ahart 2008-9-10 15360 Plumas Both sides of the Quincy La Porte Road, northwest of East Branch Creek, about 1.75 air miles south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1594 Comment
  CHSC102797  Cichorium intybus Lowell Ahart 2009-6-19 15917 Butte On the north side of Ten Mile House Road, just east of the Guardians Trail, Upper Bidwell Park, about 1/4 mile west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC11105  Circaea alpina subsp. pacifica Lowell Ahart 1969-7-30 Placer Near Ahart Camp, French Meadows. 1524 Comment
  JEPS116104  Circaea alpina subsp. pacifica Lowell Ahart, John Dittes 2009-7-28 16197 Plumas On wet soil and humus, seeps, slope northwest of mine, west (above) Forest Service Road 27N28Y, 2.9 miles (air) northwest of Butt Valley Reservoir Dam 1581 Comment
  SEINET10453141  Circaea alpina subsp. pacifica Lowell Ahart, Peter Ahart 1985-7-9 Ahart 5116 Butte About 1/2 mile west of Lumpkin Ridge Road, about 2 1/2 miles north-east of Camp 18, about 9 miles north-east of Feather Falls. Comment
  CHSC116066  Cirsium arvense Lowell Ahart; John Dittes 2015-7-16 20384 Modoc North edge of Ash Creek (destroyed), southeast of gravel pit (destroyed), about 1/8 mile east of parking area on east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC81346  Cirsium arvense Lowell Ahart 2001-9-18 9272 Plumas About 100 feet north of the pond, Butterfly Valley, about 5 miles (air) northwest of Quicy. 1104 Comment
  JEPS114659  Cirsium arvense Lowell Ahart, John Dittes 2008-8-25 15286 Modoc On the west bank of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout 1273 Comment
  SEINET13711382  Cirsium arvense Lowell William Ahart, Lowell William Ahart 2001-1 9272 Plumas 5 Air Mi. NW of Quincy at Pond in Butterfly Valley (T25N, R9E, sec 20, SE 1/4) 3625 Ft. 1105 Comment
  CDA21649  Cirsium douglasii var. breweri L. Ahart 2006-8-15 13188 Butte 15 yards west of Willow Creek, about 100 yards southeast of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. Comment
  CHSC110973  Cirsium occidentale var. candidissimum Lowell Ahart; John Dittes 2012-7-12 18366 Modoc North bank of Ash Creek, south of the gravel pit, about 1/8 mile east of the parking area on the east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  CHSC94884  Clarkia concinna subsp. concinna Lowell Ahart 2006-6-11 12668 Colusa On the west side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CAS-BOT-BC163266  Clarkia mildrediae subsp. lutescens Lowell Ahart 1983-6-30 4176 Butte Along the road, south-east of Concow Res. 500 Comment
  CHSC84165  Clarkia mosquinii Lowell Ahart 2003-6-30 10327 Butte Near the small stream, on the west side of Ponderosa Way, about 2 miles (by road) southwest of the Ponderosa Dam, about 2 miles (air) northwest of Forbestown. 490 Comment
  CAS-BOT-BC163643  Clarkia purpurea subsp. quadrivulnera Lowell Ahart 1980-5-25 2324 Butte Along Swedes Flat Road, near Bangor 320 Comment
  CHSC115386  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  SEINET516348  Claytonia exigua subsp. exigua Lowell Ahart 1985-1 4859 Butte Growing on damp bare broken disturbed serpentine W of Lunt Rd., about 1/2 mi. N of the intersection of Lunt Rd. and Hwy. 70. 518 Comment
  CAS-BOT-BC439425  Claytonia parviflora subsp. parviflora Lowell Ahart 1988-3-27 5937 Butte Along the North Fork of the Feather River, a little north of the Poe Power House, about 2 miles south-east of Jarbo Gap 274 Comment
  CHSC94238  Claytonia parviflora subsp. parviflora Lowell Ahart 2006-6-21 12850 Sierra On the south side of the Foote Road, about 1.3 miles (by road) southwest of Alleghany. 1305 Comment
  CAS-BOT-BC439813  Claytonia perfoliata Lowell Ahart 1981-4-6 2739 Sutter Near the old homestead on the south side of the South Butte, Sutter Buttes. 350 Comment
  CHSC45503  Clematis lasiantha Lowell Ahart 1977-4-5 1250 Sutter On the South Butte, Sutter Buttes. 457 Comment
  CHSC82451  Clintonia uniflora Lowell Ahart; John Dittes, Josephine Guardino 2002-7-2 9830 Plumas On the south side of Forest Road 22N94, about 75 yards west of Forest Road 22N94E, on Hartman Bar Ridge, about 1 mile (air) southwest of Franklin Hill, about 4 1/2 miles (air) northwest of Tamarack Flat, about 9 miles (air) northwest of La Porte. 1577 Comment
  JEPS94316  Collinsia heterophylla Lowell Ahart 1997-4-6 7722 Yuba about 17 mi ne of Marysville (s of the poor dirt road, n of the Browns Valley Water Ditch, s of Dry Creek, about 1 mi e of Scott Forbes Road (Long Bar Road)) 182 Comment
  RSA0117244  Collinsia parviflora L. Ahart, John Dittes, Josephine Guardino 2007-6-8 14002 Plumas East side of an open rocky flat, 50 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1966 Comment
  CHSC87926  Collinsia tinctoria Lowell Ahart 2004-5-29 10976 Sutter On a steep (cliffs) slope, about 30 yards north of the fence, where the fence ends, on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter. 537 Comment
  CHSC93857  Collinsia tinctoria Lowell Ahart 2006-6-9 12654 Butte On the west side of Bardees Bar Road, north of the small stream, about 1/8 mile west of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 3/4 miles (air) southwest of Pulga. 385 Comment
  SEINET10548310  Collinsia tinctoria Lowell Ahart, Peter Ahart 1983-6-26 Ahart 4106 Butte T21N R5E se/se sec 32. Ca. 1/8 mi e of jct of Oroville-Quincy Hwy & Ponderosa Way (Big Ridge Rd), ca. 15 mi ne of Oroville. Foothill Woodland. 500 Comment
  CHSC82507  Collinsia torreyi var. torreyi Lowell Ahart 2002-6-26 9769 Plumas On the east side of the poor road, about 1 mile south of the intersection of Lumpkin Ridge Road and the road to Tamarack Flat, about 1 mile (air) northwest of Little Grass Valley Reservoir dam, about 4 miles (air) northwest of La Porte. 1760 Comment
  CHSC54578  Collomia linearis Lowell Ahart 1991-7-22 6675 Sierra In French Meadow, about 1/4 mile south of Henness Pass Road, about 3 miles north-west of Webber Lake. 2133 Comment
  UC1586493  Collomia linearis Lowell Ahart 1991-7-22 6675 Sierra about 1/4 mi s Henness Pass Road (about 3 mi nw of Webber Lake); French Meadow 2133 Comment
  CHSC40381  Comandra umbellata subsp. californica Lowell Ahart 1985-5-15 4983 Butte East along the dirt road, about 1/2 mile north-east of Concow Res. 594 Comment
  JEPS114663  Conium maculatum Lowell Ahart, John Dittes 2008-8-25 15280 Modoc On the west bank of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout 1273 Comment
  SEINET10474184  Conyza bonariensis Lowell Ahart 1983-9-4 Ahart 4400 Sutter Dean Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 250 m. 250 Comment
  JEPS122241  Conyza canadensis Lowell Ahart 2014-9-9 19835 Plumas Below the high water line, on the sides of Sly Creek, Sly Creek Reservoir, about 7 miles (air) southwest of La Porte. Comment
  CHSC81111  Cornus sessilis Lowell Ahart 2001-8-28 9184 Tehama Along a small dry stream, on the east side of Highway 32 and southeast of the intersection with road 390 - G of Sierra Pacific Industries, about 4 miles by road south of bridge across Deer Creek. 1219 Comment
  UCD169427  Coronilla varia Lowell Ahart 2006-6-24 12862 Butte About 4 miles (air) northeast of Cohasset, on Cohasset Ridge, a gated road goes southeast, on the east side of the dirt road (Ponderosa Way), south of an intersection. 1113 Comment
  CDA34627  Cotoneaster lacteus L. Ahart 2009-5-3 15802 Butte On the south side of Ten Mile House Road, Upper Bidwell Park, about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. Comment
  CAS-BOT-BC291367  Cotula coronopifolia Lowell Ahart 1984-4-19 4578 Sutter Along West Butte Road, about 1/8 mile north of the Sacramento Outing Club, Sutter Buttes 35 Comment
  SEINET10473721  Cotula coronopifolia Lowell Ahart 1983-5-14 Ahart 3997 Sutter Along West Butte Rd, ca. 1/8 mi n of the Sacramento Outing Club, Sutter Buttes, w of Marysville. Valley Grassland; 35 m. 35 Comment
  CHSC113144  Crassula aquatica Lowell Ahart 2013-11-13 19247 Butte Below the high water line of Lake Oroville, along the sides of Sucker Creek, about 30 yards north of the South Fork of the Feather River, about 1/4 mile northwest of the Ponderosa Dam. 244 Comment
  CHSC78141  Crassula aquatica Lowell Ahart 2000-5-21 8379 Butte Slickens from the Cherokee mine, on the east side of Clark Road (Highway 191), about 200 yards south of Dry Creek, about 10 miles (air) northwest of Oroville. 60 Comment
  SEINET10449710  Crassula erecta Lowell Ahart 1983-5-4 Ahart 3939 Sutter Along edge of Pass Rd, ca. 4 mi w of Kellogg Rd, Sutter Buttes. Valley Grassland. West of Marysville. 50 Comment
  CHSC90954  Crassula tillaea Lowell Ahart 2005-4-14 11726 Butte About 20 feet east of the railroad tracks, north of Spruce Street, Gridley. 28 Comment
  CHSC100511  Crataegus douglasii Lowell Ahart; John Dittes 2008-8-25 15330 Modoc On the north bank of Ash Creek, Ash Creek State Wildlife Area, 4500 feet south of County Road 87, 2.7 miles (air) west of Adin, 9.1 miles (air) northeast of Bieber. 1271 Comment
  SEINET10839182  Crepis occidentalis Lowell Ahart, Peter Ahart 1983-8-17 Ahart 4333 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. Red Fir Forest; 2000 m. 2000 Comment
  JEPS128673  Crepis occidentalis subsp. conjuncta Lowell Ahart, John Dittes, Josephine Guardino 2017-6-28 21505 Nevada About 20 yards north of the north edge of Carpenter Meadow, about 80 yards south of the poor dirt road, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. Comment
  JEPS117488  Crepis occidentalis subsp. pumila Lowell Ahart, John Dittes 2010-7-31 16982 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CAS-BOT-BC376471  Crepis pleurocarpa Lowell Ahart 1985-6-30 5087 Butte 100 yards south of the road to the Forbestown Res., near the Forbestown Ditch, about 2 1/2 miles north-east of Forbestown 883 Comment
  CDA32126  Croton setiger L. Ahart, John Dittes 2008-8-21 15265 Merced On the bottom of vernal pools, about 10 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. Comment
  CHSC113003  Croton setiger Lowell Ahart 2013-8-2 18986 Tehama On the south side of Burris Creek, strand of Black Butte Reservoir, about 1 1/2 miles southwest of the Dam, about 12 miles (air) northwest of Orland. 135 Comment
  CHSC113321  Crucianella angustifolia Lowell Ahart; John Dittes 2014-5-17 19511 Tehama On the dirt and rock piles, north of the poor dirt road, about 50 yards west of the diversion dam on Mill Creek, about 5 miles (air) northeast of Los Molinos. 124 Comment
  CHSC117425  Crucianella angustifolia Lowell Ahart 2016-5-30 20899 Butte West of Little Pump, Peter Ahart Ranch, about 2 1/2 miles north and 1/4 mile east of Honcut, about 12 miles (air) south of Oroville. 30 Comment
  CHSC113528  Crypsis schoenoides Lowell Ahart 2014-9-23 19874 Butte Near a small drainage, on the northeast part of Horseshoe Lake, about 100 yards northeast of the Rod and Gun Club, Upper Bidwell Park, about one mile east of Chico. 88 Comment
  CHSC31726  Crypsis schoenoides L. Ahart 1974-9-8 633 Butte Bottom of a wash. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC47612  Crypsis schoenoides Lowell Ahart 1984-8-19 4788 Butte In an area where gravel is removed, north of the state borrow area, west of Pacific Heights Road, about 5 miles south-west of Oroville. 36 Comment
  CHSC94610  Crypsis schoenoides Lowell Ahart 2006-9-11 13303 Butte South edge of the North Fork of the Feather River, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville. 431 Comment
  JEPS103343  Crypsis schoenoides Lowell Ahart 2002-11-5 10020 A Tehama East of where Burris Creek runs into Black Butte Lake, ca 15 feet below the high water line of the lake, ca 12 miles (air) NW of Orland. 152 Comment
  RSA702785  Crypsis schoenoides L. Ahart 2004-10-4 11442 Lake Below the high water line of Indian Valley Reservoir, east of the causeway, in the northwest part of the reservoir, on the east side of Bartlett Springs Road. 447 Comment
  JEPS104457  Cryptantha crinita Lowell Ahart 2003-5-12 10126 Tehama Along a wash, on the nw side of the poor dirt road, just n of Jelly Ferry Rd, 1.3 mi (air) sw of Coleman Fish Hatchery, ca 6.0 mi (air) e of Cottonwood. 131 Comment
  UC1442623  Cryptantha crinita Lowell Ahart 1979-4-25 Tehama 1.5 mi n Red Bluff (along Dibble Creek, just e of e bridge of I-5 that crosses Dibble Creek); Dibble Creek 100 Comment
  SD122569  Cryptantha flaccida Lowell Ahart 1984-5-18 4607 Butte Peter Ahart Ranch, ca. 1.5 miles northeast of Honcut, ca. 12 miles south of Oroville 49 Comment
  CHSC33752  Cryptantha intermedia L. Ahart 1981-4-6 2725 Sutter On e side of small stream on s side of South Butte, Sutter Buttes. 200 Comment
  CHSC44380  Cryptantha intermedia Lowell Ahart 1988-6-29 6113 Butte Along Bean Creek Road, near camping area along Bean Creek, about 4/3 mile south-west of Johnson Ranch, about 2 1/2 miles south of Little Bald Rock. 548 Comment
  JEPS103576  Cryptantha microstachys Lowell Ahart 2002-4-27 9548 Tehama About 10 yards NW of the cattle guard, NW of where the road is wide and one can park, on the W side of the dirt road that leads to the tower, E of Road M2, ca 8 miles W of Paskenta. 609 Comment
  CHSC37212  Cryptantha milobakeri L. Ahart 1982-7-28 3712 Butte On the bottom of the water ditch, ca. 1/8 mi n of Pacific Mine, ca. 5 mi e of La Porte. 1700 Comment
  CHSC10644  Cupressus macnabiana Lowell Ahart 1969-1-25 Yuba Near Challenge. 914 Comment
  CAS-BOT-BC224425  Cuscuta californica Lowell Ahart 1988-8-10 6170 Butte West of Lunt Road, about 1/2 mile north-west of Highway 70 548 Comment
  UC1586521  Cuscuta californica Lowell Ahart 1991-9-6 6711 Butte 10 mi sw Gridley (n side of Rutherford Road, .12 mi w of Pennington Road, e of Parking Area 5); Gray Lodge Waterfowl Management Area 30 Comment
  CHSC63457  Cuscuta californica var. californica Lowell Ahart 1994-7-22 7506 Plumas Southside of the Pacific Crest Trail, north of Mount Etna. 1981 Comment
  CHSC31646  Cuscuta howelliana L. Ahart 1978-5-15 1722 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CHSC103432  Cuscuta pentagona Lowell Ahart 2009-11-12 16517 Mendocino On the south side of the Russian River, below the high water line of Lake Mendocino, about 200 yards south of Highway 20. 230 Comment
  HSC100786  Cuscuta pentagona Lowell Ahart, John Dittes 2008-8-21 15238 Merced On the banks and at bottom of Dutchman Slough, 220 yd. S of the wire gate on the S side of Sandy Mush Rd., 3.7 mi. W of Hwy. 99, and 8.5 mi. SSE of Merced. 53 Comment
  JEPS110300  Cuscuta pentagona Lowell Ahart 2006-9-13 13313 Butte South edge of the North Fork of the Feather River, just west of Mill Creek, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville 431 Comment
  RSA768856  Cuscuta pentagona L. Ahart, John Dittes 2008-8-21 15238 Merced Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CHSC102100  Cuscuta subinclusa Lowell Ahart; John Dittes, Josephine Guardino 2009-7-29 16247 Plumas Growing on Ceanothus integerrimus, on the west side of Forest Service Road 26N22, 1.2 miles (air) east of Seneca. 1517 Comment
  CAS-BOT-BC190246  Cynodon dactylon Lowell Ahart 1980-8-16 2585 Butte Peter Ahart Ranch, Honcut. 50 Comment
  JEPS113724  Cynodon dactylon Lowell Ahart 2007-5-14 13845 Yuba East of the dirt road, 20 yards northeast of the gate, about 20 yards south of the power tower, about 30 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 35 Comment
  JEPS115300  Cynoglossum grande Lowell Ahart 2009-4-22 15570 Butte West side of Guardians Trail, about 100 yards north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 381 Comment
  SEINET10507676  Cynosurus echinatus Lowell Ahart, Peter Ahart 1983-6-12 Ahart 4035 Butte T20N R5E n half sec 36. Ca. 1 mi s of Crystal Hill, n of Oregon Gulch, near Lake Oroville, ca. 7 mi sw of Feather Falls. Yellow Pine Forest. Comment
  SEINET10872741  Cyperus aristatus Lowell Ahart 1985-11-7 Ahart 5232 Butte Lake Oroville, on the north side of the South Fork of the Feather River, about 200 yards north-west of the Ponderosa Dam. Comment
  JEPS120155  Cyperus difformis Lowell Ahart 2012-10-20 18504 Butte On the south side of Big Chico Creek, about 100 yards west of Table 4, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC105658  Cyperus eragrostis Lowell Ahart; John Dittes 2010-10-4 17287 Tehama Along Toomes Creek, Toomes Creek at Tehama-Vina Road crossing, 1.2 miles (air) east of the Sacramento River, 3.4 miles (air) southeast of Los Molinos (High School), 3.0 miles (air) northwest of Vina. 57 Comment
  JEPS120838  Cyperus eragrostis Lowell Ahart 2013-7-9 18834 Butte South side of North Honcut Creek, west of the steel power line, about 2 air miles northeast of Honcut, about 13 air miles southeast of Oroville. Comment
  RSA724832  Cyperus eragrostis L. Ahart 2006-6-15 12790 Glenn On the west side of Forest Road 18N03, about 1.5 miles (air) northeast of the North Fork Campground, about 5.75 miles (air) west-northwest of Stonyford. 631 Comment
  SBBG60502  Cyperus eragrostis L. Ahart with J. Dittes 2010-10-4 17287 Tehama Toomes Crk, Toomes Crk at Tehama-Vina Rd crossing, 1.2 mi (air) E of Sacramento River, 3.4 mi (air) SE of Los Molinos (High School), 3.0 mi (air) NW of Vina 57 Comment
  CAS-BOT-BC114380  Cyperus erythrorhizos Lowell Ahart 1986-11-9 5447 Butte Ca 1/10 mi S of the clay burrow for Oroville Dam, 1/4 mi E of Larkin Road, 36 Comment
  CAS-BOT-BC114381  Cyperus erythrorhizos Lowell Ahart 1974-11-9 s.n. Butte In a rice field, Peter Ahart Ranch, Honcut. 45 Comment
  CHSC83031  Cyperus erythrorhizos Lowell Ahart 2002-10-8 9945 Yuba On the edge of a pond, about 100 yards north of Long Ravine Road, about 300 yards southeast of the intersection of Camp Far West Road and Long Ravine Road there is a poor gate on the north side of the road, north of Camp Far West Reservoir. 121 Comment
  CHSC83084  Cyperus erythrorhizos Lowell Ahart 2002-10-17 9997 Butte Bottom of a wash, between the gentle hills below the high water line of Lake Oroville, about 1 1/2 miles south of Highway 162 (Oroville Quincy Highway), about 3 miles (air) northeast of Oroville Dam. 227 Comment
  CHSC97763  Cyperus erythrorhizos Lowell Ahart 2007-11-3 14555 Butte Below the high water line of Lake Oroville, about 3/4 mile east of the Power House below Kunckle Reservoir, about 1 1/4 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise. 259 Comment
  JEPS115040  Cyperus erythrorhizos Lowell Ahart 2007-11-3 14555 Butte Below the high water line of Lake Oroville, about 3/4 mile east of the Power House below Kunckle Reservoir, about 1 1/4 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise 259 Comment
  SEINET13710860  Cyperus erythrorhizos Lowell William Ahart, Lowell William Ahart 2003-1 10596 Tehama Near Hwy 99 about 5 Mi. SE of Los Molinos (39 Deg 57'14.5"N, 122 Deg 02'52.4W) 200 Ft. 61 Comment
  SEINET13711402  Cyperus flavescens Lowell William Ahart, Lowell William Ahart 1999-1 8143 Butte 12 Air Mi SW of Chico, 2 Mi SE Ordbend Comment
  SEINET7581946 Image available Cyperus flavescens Lowell Ahart 1987-9-4 5877 Butte North Honcut Creek, about 2miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. 67 Comment
  CDA2587  Cyperus fuscus L. Ahart, Vernon Oswald 1999-10-3 8287 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. Comment
  CHSC112803  Cyperus fuscus Lowell Ahart 2013-8-8 19008 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  JEPS119909  Cyperus fuscus Lowell Ahart 2012-10-20 18500 Butte On the south side of Big Chico Creek, about 50 yards west of Table 4, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  JEPS119815  Cyperus iria Lowell Ahart 2012-8-6 18415 Butte On the west side of Richvale South Highway, about 1 1/2 miles south of Richvale. Comment
  SEINET4896991  Cyperus iria L. Ahart 1999-9-5 8197 Yuba 5 miles NE of Marysville. Legal: T16N R4E Comment
  CHSC34173  Cyperus niger L. Ahart 1981-9-19 3181 Butte Along edge of Hwy 70 just n of Arch Rock Tunnel, ca. 10 mi s of Storrie. 550 Comment
  JEPS116000  Cyperus niger Lowell Ahart 2009-6-30 15924 Butte Drainages in meadow on the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 236 Comment
  CHSC102683  Cyperus squarrosus Lowell Ahart; John Dittes, Josephine Guardino 2009-8-27 16336 Tehama On a small mound, island when pond is full, about 100 yards east of Forest Service Road 29N25A, Childs Meadows, about 2,600 feet south of the intersection of Highway 36 (89) and Forest Service Road 29N25A, 2.3 miles (air) northeast of the town of Mill Creek, 9.1 miles (air) south of Lassen Peak. T29N R04E, area between southeast 1/4 Section 23 and southwest 1/4 Section 24. 1493 Comment
  CHSC45150  Cyperus squarrosus Lowell Ahart 1972-5-24 112 Butte On the bottom of a small wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/4 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC59011  Cyperus squarrosus Lowell Ahart 1992-7-21 6811 Butte On the sides of a snow lake, on the south side of Coon Hollow, about 2 (air) miles north-east of Philbrook Reservoir. 1737 Comment
  CHSC99002  Cyperus squarrosus Lowell Ahart 2008-5-30 14797 Butte Dry to damp granite soil, small meadow, bottom of an old gold mined area, about 150 yeards west of the cemetery, about 150 yards north of Oregon Gulch, about 10 miles (air) northeast of Oroville. 305 Comment
  JEPS121963  Cyperus squarrosus Lowell Ahart 2014-7-7 19576 Butte North of the bog, Coon Hollow, about 2 miles (air) north of Philbrook Reservoir. Comment
  CAS-BOT-BC114077  Cyperus squarrosus Lowell Ahart 1974-7-1 s.n. Butte Bottom of a small wash, Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC114204  Cyperus strigosus Lowell Ahart 1982-10-11 3854 Butte West of the check-in-station, Gray Lodge, ca. 12 mi SW of Gridley. 35 Comment
  CDA30199  Cyperus strigosus L. Ahart 2009-8-3 16256 Butte Along small drainages, on the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. Comment
  CHSC109749  Cyperus strigosus Lowell Ahart 2012-10-20 18501 Butte About 100 yards west of Table 4, west of Cedar Grove, Lower Bidwell Park, Chico. 68 Comment
  CHSC34118  Cyperus strigosus L. Ahart 1981-9-10 3136 Sutter On the bottom of a small stream, near the old homestead, s side of South Butte, Sutter Buttes. 450 Comment
  CHSC69522  Cyperus strigosus Lowell Ahart 1997-9-11 7909 Plumas On the east side of Caribou Road, on the east side of the North Fork of the Feather River, at the elevated siphon, about 2 miles (air) northeast of Belden. 731 Comment
  JEPS95071  Cyperus strigosus Lowell Ahart 1997-9-11 7909 Plumas about 2 air mi ne of Belden (on e side of Caribou Road, on e side of North Fork Feather River, at elevated siphon); Caribou Road, North Fork Feather River 731 Comment
  CAS-BOT-BC70701  Cystopteris fragilis Lowell Ahart 1980-9-9 2606 Sierra between the outlet of Webber Lake and Little Truckee River 2200 Comment
  CHSC46168  Cystopteris fragilis Lowell Ahart 1973-5-31 250 Plumas Near the Little North Fork of the Feather River. 1066 Comment
  CHSC84994  Cystopteris fragilis Lowell Ahart 2003-10-17 10652 Plumas Cliffs north of Humboldt Peak, on the south side of the Pacific Crest Trail, about 1/2 mile east of Humboldt Summit, about 8 miles (air) northeast of Butte Meadows. 2042 Comment
  CHSC10540  Damasonium californicum Lowell Ahart 1968-4-6 Butte Peter Ahart Ranch, Honcut. 42 Comment
  UC1594704  Danthonia californica Lowell Ahart 1992-7-21 6801 Butte about 2 air mi ne Philbrook Reservoir (high sides of snow lake on s side of Hollow); Coon Hollow 1737 Comment
  CHSC44559  Danthonia californica var. americana Lowell Ahart 1979-6-25 1953 Yuba Along the road gutter, there is a spring near by, about 2 miles east of Challenge. 640 Comment
  JEPS106216  Danthonia californica var. californica Lowell Ahart, John Dittes, Josephine Guardino 2004-6-6 11006 Plumas Near a very small flat drainage, on the east side of the logging road, about 3 miles (air) south of Lower Taylor Rock, about 7 miles (air) northeast of Quincy 1344 Comment
  CHSC99483  Danthonia unispicata Lowell Ahart; John Dittes 2008-6-19 14869 Butte Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
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Oct 5 2019
  CHSC94514  Datura wrightii Lowell Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1 1/2 miles (air) east of East Park Reservoir, about 4 1/2 miles (air) northeast of Lodoga. 545 Comment
  JEPS94939  Daucus carota Lowell Ahart 1997-8-13 7841 Nevada about 1.5 mi w of Penn Valley (along the sides of Penn Valley Road, just e of intersection of Indian Springs Road and Penn Valley Road, just s of Highway 20); Penn Valley Road 426 Comment
  CHSC39491  Daucus pusillus Lowell Ahart 1983-6-21 4077 Butte Along Bloomer Hill Road, about 3/4 mile west of the Oroville Quincy Highway, about 15 miles north-east of Oroville. 425 Comment
  JEPS127023  Daucus pusillus Lowell Ahart 2016-6-4 20919 Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. Comment
  CHSC105976  Deinandra lobbii Lowell Ahart; John Dittes 2010-8-30 17059 Modoc In a large vernal pool, about 5 yards east of the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117021  Delphinium gracilentum Lowell Ahart 2016-6-2 20913 Plumas Basalt flat, on the west side of the paved road, Lumpkin Ridge Road, about 3 3/4 miles (air) southwest of Little Grass Valley Reservoir dam. 1555 Comment
  CHSC97151  Delphinium nuttallianum Lowell Ahart; John Dittes, Josephine Guardino 2007-6-8 14059 B Plumas East side of an open rocky flat, 60 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1965 Comment
  JEPS107808  Delphinium nuttallianum Lowell Ahart, John Dittes 2005-6-2 11955 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  JEPS119601  Delphinium patens subsp. patens Lowell Ahart 2012-4-9 17842 Butte Northwest of South Rim Trail, south part of Upper Bidwell Park, about 2 1/4 miles (air) northeast of Chico. Comment
  CAS-BOT-BC121625  Delphinium patens subsp. patens Lowell Ahart 1990-3-28 6429 Butte South side of Pacific Heights Road, about 3 1/2 miles southwest of Oroville 39 Comment
  CAS-BOT-BC17016  Delphinium variegatum Lowell Ahart 1980-4-21 2094 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CAS-BOT-BC17017  Delphinium variegatum Lowell Ahart 1980-5-4 2185 Butte Thermalito. 65 Comment
  JEPS114443  Delphinium variegatum subsp. variegatum Lowell Ahart, John Dittes, Josephine Guardino 2008-4-12 14667 Merced On dry soil,slopes of mounds, about 1/2 mile southt of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CHSC84334  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2003-7-14 10395 Lake Near a small stream, at Barrel Spring, about 1 1/2 miles (air) south of Bartlett Springs Road, about 2 miles (air) west of Bear Valley. 396 Comment
  JEPS110321  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2006-7-25 13057 Butte In the west part of a large wet meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows 1569 Comment
  RSA0080119  Deschampsia danthonioides Lowell Ahart 2011-6-22 17550 Modoc About 100 yards north of he Pilot Butte Parking Lot, north edge of Ash Crek Floodplain, 1.1 miles (air) south of County Road 87, 7.7 miles (air) west of Adin, 10 miles (air) east of Lookout, Big Valley. 1264 Comment
  CHSC78359  Deschampsia elongata Lowell Ahart 2000-6-29 8549 Butte On the west side of Concow Road at Flea Meadow, about 1/2 mile west of Flea Mountain, about 3 1/2 miles (air) north of Concow Reservoir, about 5 miles (air) east of Magalia. 1036 Comment
  CHSC80820  Descurainia incana Lowell Ahart 2001-8-21 8963 Nevada On the south side of the dirt road, in the old sheep corral, northeast of Lake Van Norden, about 1 1/2 miles east of Soda Springs. 2063 Comment
  JEPS107794  Descurainia sophia Lowell Ahart 2005-6-2 11925 A Lassen near the Anderson Ranch home, Long Valley, about 4 3/4 air mi N of intersection of Scott Road and Hwy 70, 6.2 air mi NW of Hallelujah Junction 1459 Comment
  RSA715489  Descurainia sophia L. Ahart, John Dittes 2005-6-9 12054 Siskiyou On the east side of a poor rock fence, about 350 yards E of where cattle water in the Shasta River, about 3/5 mile (air) south of Highway 99/97 Cutoff, about 2.5 miles (air) ESE of Grenada. 775 Comment
  CHSC97132  Dianthus armeria subsp. armeria Lowell Ahart 2007-7-2 14247 Butte On the north side of Big Ridge Road, about 20 yards south of Minnie Creek, about 1 1/2 miles east of the Oroville Quincy Highway, about 10 miles (air) northeast of Oroville. 680 Comment
  JEPS108817  Dicentra chrysantha Lowell Ahart 2006-6-11 12697 Glenn On the south side of the road, about 1/8 mile past the meadow (east), seep at the start of Black Diamond Creek, about 2 1/2 miles (air) northeast of the North Fork Campground, about 4 miles (air) northwest of Stonyford 755 Comment
  SEINET10904730  Dicentra formosa Lowell Ahart, Peter Ahart 1983-9-21 Ahart 4465 Butte T20N R8E section 5. Along French Creek, ca. 3 mi n of the Sly Creek Dam, n of Strawberry Valley. Yellow Pine Forest; 900 m. 900 Comment
  JEPS110528  Dichanthelium acuminatum subsp. fasciculatum Lowell Ahart 2006-10-23 13499 Plumas On the east side of Slate Creek (there is a large gravel flat caused by the dam), about 30 yards south of where the road ends, about 20 yards north of the dam across Slate Creek, about 1/8 mile northeast of Scales Road, about 5 1/2 miles (air) northeast o 1281 Comment
  CHSC43279  Digitaria ischaemum Lowell Ahart 1987-8-30 5858 Butte On a gravel bar along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CAS-BOT-BC209040  Digitaria sanguinalis Lowell Ahart 1986-11-14 5464 Butte On the bottom of teh pond, about 1/10 mile south of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miles south-est of Oroville. 36 Comment
  CAS-BOT-BC209041  Digitaria sanguinalis Lowell Ahart 1987-8-30 5858 Butte On a gravel bar along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap 271 Comment
  CHSC112741  Digitaria sanguinalis Lowell Ahart 2013-11-17 19268 Butte Steep hillside, about 60 yards east of McCabe Creek, below the high water line of Lake Oroville, about 5/8 mile southwest of the Enterprise Bridge across Lake Oroville. 245 Comment
  CHSC41983  Digitaria sanguinalis Lowell Ahart 1986-11-7 5426 Butte In a prune orchard, east of the Feather River, north of the Oroville Gridley Highway, about 3 miles east of Gridley. 28 Comment
  CAS-BOT-BC151974  Diplacus douglasii Lowell Ahart 1982-3-6 3237 Sutter On a small hill top west of the Dean Cabin, Dean Ranch, Sutter Buttes 350 Comment
  CAS-BOT-BC150498  Diplacus grandiflorus Lowell Ahart 1983-7-29 4230 Butte About 1/4 mile west of Milsap Bar, about 25 miles north-east of Oroville 500 Comment
  CHSC115258  Diplacus kelloggii Lowell Ahart 2015-5-9 20164 Sierra On the north side of the Canyon Creek Trail, trail on the north side of the North Fork of the Yuba River, about 100 yards west of Highway 49, about one mile west of Indian Valley. 692 Comment
  CHSC12191  Diplacus kelloggii Lowell Ahart 1973-4-15 Butte Swedes Flat Road, Bangor. 304 Comment
  CHSC10824  Diplacus mephiticus Lowell Ahart 1968-6-29 Plumas Six miles N. E. of La Porte. 1371 Comment
  CAS-BOT-BC154018  Diplacus torreyi Lowell Ahart 1980-6-19 2404 Yuba 3 1/2 miles south-east of Challenge 800 Comment
  CHSC107353  Diplacus tricolor Lowell Ahart; John Dittes 2011-6-9 17439 Tehama Rio De Los Molinos Land Grant. On the bottom of a small vernal pool, 50 yards east of a large vernal pool, sand dune area, about 40 yards south of the fence, 1.6 miles (air) east of Highway 99, 2.4 miles (air) north of Vina. 80 Comment
  CAS-BOT-BC208643  Distichlis spicata Lowell Ahart 1984-9-22 4794 Sutter At the lower part of the South Butte, Sutter Buttes. 70 Comment
  CHSC91248  Distichlis spicata Lowell Ahart; John Dittes 2005-6-9 12004 Siskiyou Meadow area along a small drainage, on the east side of a poor rock fence, about 300 yards east of where cattle water in the Shasta River, about 3/5 mile (air) south of Highway 99/97 Cutoff, about 2 1/2 miles (air) east-southeast of Grenada. 774 Comment
  SBBG119745  Distichlis spicata L. Ahart 2006-9-26 13353 Colusa N side of Maxwell Rd, between the deep ditch and the Delevan Nat Wildlife Refuge, ca. 3 mi W of Colusa Princeton Rd, ca. 5.5 mi E of Maxwell 24 Comment
  CDA34546  Dittrichia graveolens L. Ahart 2007-10-3 14510 Butte West side of Highway 99, about 100 yards north of Badger Creek Road, about 500 yards south of Richvale East Road, about 7 (air) miles west of Oroville. Comment
  JEPS121239  Downingia bacigalupii Lowell Ahart, John Dittes 2013-7-22 18875 Lassen Around the man-made pond, about 150 yards N of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA768782  Downingia bacigalupii L. Ahart, John Dittes 2010-7-31 17013 Lassen About 2300 feet north of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1511 Comment
  JEPS118009  Downingia bella Lowell Ahart, John Dittes 2011-6-9 17449 Tehama Rio De Los Molinos Land Grant. Bottom of a large vernal pool, sand dune area, about 100 yards south of the fence, 1.6 miles (air) east of Highway 99, 2.4 miles (air) northeast of Vina 80 Comment
  CHSC47396  Downingia cuspidata Lowell Ahart 1978-5-2 1701 Butte Growing in shallow water in a vernal pool, near the large parking area on top of Table Mountain, about 7 miles north of Oroville. 426 Comment
  JEPS104200  Downingia cuspidata Lowell Ahart 2003-5-28 10227 Butte Center of a vernal pool, ca 100 feet w of Hendricks ditch, ca 1 3/4 mi nw of the iron gate and fence, nw of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 271 Comment
  JEPS104332  Downingia cuspidata Lowell Ahart 2003-5-12 10142 Shasta In a vernal pool, pasture field, ca 250 yd south of the barn, ca 1/4 mi south of the Coleman Canal, 2.8 mi (air) wsw of Darah Springs State Fish Hatchery, ca 12 mi (air) ene of Cottonwood. 265 Comment
  RSA691013  Downingia cuspidata L. Ahart 2003-5-28 10227 Butte About 100 ft W of Hendricks ditch, about 1 3/4 miles NW of the iron gate and fence, NW of Cherokee Road, North Table Mt., about 7 miles (air) N of Oroville. 272 Comment
  CHSC90641  Draba verna var. aestivalis Lowell Ahart 2005-4-2 11686 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 25 Comment
  SEINET10448472  Draba verna var. aestivalis Lowell Ahart 1983-4-1 Ahart 3914 Butte In Dark Canyon along old Hwy 40 s of its jct with Hwy 70, ca. 4 mi s of Jarbo Gap, ne of Oroville. Foothill Woodland; 350 m. 350 Comment
  CHSC84982  Draperia systyla Lowell Ahart 2003-10-11 10625 Yuba On the east margins of a gravel road to the Rose Ranch, about 100 yards west of the paved road to Scales, about 1/2 mile south of the Rose Ranch, about 5 miles (air) northeast of Strawberry Valley, about 7 miles (air) southwest of La Porte. 1219 Comment
  JEPS114358  Drymocallis hansenii Lowell Ahart 2008-7-16 15088 Plumas On the east side of a small stream, about 150 yards north of the paved road, about 1/4 mile west of the bridge where the South Fork of the Feather River flows into Little Grass Valley Reservoir, about 2 1/2 miles (air) north of La Porte 1597 Comment
  CHSC87924  Dryopteris arguta Lowell Ahart 2004-5-29 10974 Sutter On a steep (cliffs) slope, about 30 yards north of the fence, where the fence ends, on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter. 537 Comment
  CHSC109098  Duchesnea indica var. indica Lowell Ahart 2012-4-6 17819 Butte On the north side of Big Chico Creek, Bidwell Park, city of Chico. 60 Comment
  CHSC117752  Dysphania ambrosioides Lowell Ahart 2016-10-12 21372 Butte Around buildings, Dave Daley Ranch, about one-mile northeast of Honcut, about 12 miles south of Oroville. 30 Comment
  CHSC31540  Dysphania ambrosioides L. Ahart 1978-8-30 1799 Butte Along the edge of North Honcut Creek. Peter Ahart Ranch. 15 Comment
  CHSC81615  Dysphania ambrosioides Lowell Ahart 2001-10-8 9331 Plumas Sand bar, on the west side of Indian Creek, about 400 yards south of ArlingtonRoad, about 200 yards east of Highway 89, about 1 1/2 miles south of Crescent Mills. 1066 Comment
  CHSC75996  Dysphania botrys Lowell Ahart; Vernon H. Oswald 1999-8-13 8178 Butte Disturbed area along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southwest of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS119950  Dysphania botrys Lowell Ahart 2012-9-5 18447 Plumas Road edge, where the County Road crosses the South Fork of the Feather River, about 1 mile (air) southwest of Pilot Peak, about 8 1/24 miles (air) northwest of La Porte. Comment
  CHSC102266  Dysphania pumilio Lowell Ahart 2009-10-27 16484 Napa Below the high water line of Lake Berryessa, about 100 yards east of Eticuera Creek, about 50 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of Winters. 130 Comment
  CHSC40611  Dysphania pumilio Lowell Ahart 1985-10-12 5203 Butte Along the boat ramp, at the end of Nelson Bar Road, about 1 mile south of Kunkle Reserovir, about 3 miles south of Paradise. 301 Comment
  JEPS124011  Dysphania pumilio Lowell Ahart, John Dittes 2015-8-5 20458 Tehama East side of Childs Meadow, 150 yards west of Highway 36, 0.69 air-miles northwest of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.2 air-miles east of Doe Mountain, 9.77 air-miles south of Lassen Peak. Comment
  CDA1978  Echinochloa colona L. Ahart 1999-9-21 8282 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. Comment
  CHSC25500  Echinochloa colona L. Ahart 1977-8-14 1547 Butte On the sides of a slough. Peter Ahart Ranch, Honcut. 50 Comment
  CHSC87972  Echinochloa colona Lowell Ahart 2004-6-18 11080 Glenn Gravel bar on the south side of Salt Creek, south of the bridge across Salt Creek, on the south side of Newville Road, about 1/4 mile west of Newville, about 5 miles (air) west of Black Butte Reservoir. 203 Comment
  CHSC88283  Echinochloa colona Lowell Ahart 2004-6-28 11129 Tehama Gravel bar on the south side of Thomes Creek, about 1/4 mile east of Paskenta. 213 Comment
  JEPS120037  Echinochloa colona Lowell Ahart 2012-9-28 18460 Butte Just east of the east end of Sycamore Pool in Big Chico Creek, Lower Bidwell Park, Chico. Comment
  JEPS120722  Echinochloa colona Lowell Ahart 2013-10-12 19106 Butte On the east side of Palermo Honcut Highway, about 20 yards south of Palermo Road, Palermo. Comment
  CHSC108135  Echinochloa crus-galli Lowell Ahart 2011-10-29 17727 Butte On the bare sides of a ditch, on the south side of Biggs Princeton Road, about 500 yards west of Riceton Highway, about 1 mile northwest of Biggs. 27 Comment
  SEINET231721 Image available Echinochloa crus-galli Lowell Ahart 1984-9-17 4792 Butte Peter Ahart Ranch ca 2.3 mi N and 0.3 mi E of Honcut ca 12 mi S of Oroville 50 Comment
  SEINET10509316  Echinochloa crus-galli Lowell Ahart 1984-9-17 Ahart 4792 B Butte Peter Ahart Ranch, ca. 2.3 mi N and 0.3 mi E of Honcut, ca. 12 mi S of Oroville. Valley Grassland; 50 m elev. 50 Comment
  SEINET10934938  Echinochloa crus-galli Lowell Ahart 1990-9-30 Ahart 6604 Butte Along the edges of Canyon Creek, below the high water line of Lake Oroville, below the Canyon Creek Bridge across Lake Oroville. Foothill Woodland (destroyed). T20N R5E SE/S17. 229 Comment
  JEPS93836  Echinochloa muricata Lowell Ahart 1998-7-1 8031 Butte about 7 air mi n of Oroville (50 yards n of a poor east west fence, about 3/4 mi nw of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain, Cherokee Road 350 Comment
  CHSC76295  Echinodorus berteroi Lowell Ahart 1999-9-21 8275 Butte Large disturbed area along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS106009  Echinodorus berteroi Lowell Ahart 2004-10-4 11435 Lake Indian Valley Reservoir, east of the causeway, in the northwest part of the reservoir, on the east side of Bartlett Springs Road. Comment
  CHSC84426  Eichhornia crassipes Lowell Ahart 2003-8-24 10542 Butte On the north side of Highway 149, about 1/4 mile west of Highway 70, about 5 1/2 miles (air) northwest of Oroville. 71 Comment
  RSA0011838  Elaeagnus angustifolia L. Ahart, Mike G. Womack 2006-8-29 13239 Butte About 20 yards east of a large canal, about 100 yards north of the Headquarters, Gray Lodge Wildlife Area (Gray Lodge Waterfowl Management Area). 20 Comment
  CHSC113232  Elatine Lowell Ahart 2014-4-30 19421 Butte About 50 yards south of Lower Honcut Road, about 50 yards west of the Railroad, about 1 3/4 miles (air) southwest of Honcut. 23 Comment
  CHSC116188  Elatine Lowell Ahart; John Dittes 2015-7-15 20352 Modoc On the east side of Elkins Lane, about 200 yards northeast of the Parking Area, northwest of the old barn, Ask Creek State Wildlife Area, about 3.9 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  CHSC116192  Elatine Lowell Ahart; John Dittes 2015-7-15 20351 Modoc On the east side of Elkins Lane, about 200 yards northeast of the Parking Area, northwest of the old barn, Ask Creek State Wildlife Area, about 3.9 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  RSA0114933  Elatine Lowell Ahart, John Dittes 2013-7-24 18919 Modoc Around a man made pond, north side of Ash Creek Floodplain, 0.54 mile (air) southeast of Pilot Butte Parking Area, 1.1 miles (air) south of Country Road 87, 6.8 miles (air) west of Adin, Big Valley. 1263 Comment
  SEINET10904442  Elatine Lowell Ahart, Peter Ahart 1985-9-26 Ahart 5176 Plumas Below the high water line of Little Grass Valley Reservoir, where the South Fork of the Feather River flows into the lake, about 4 1/4 miles north-east of La Porte. Comment
  JEPS122236  Elatine ambigua Lowell Ahart 2014-9-28 19881 Butte Peter Ahart Ranch, about 2 1/4 miles north and 1/2 mile east of Honcut. Comment
  JEPS123876  Eleocharis acicularis Lowell Ahart 2015-4-24 20062 Butte About 1 1/4 miles north of Rutherford Road, Gray Lodge Wildlife Area, about 6 1/2 miles (air) southwest of Gridley. Comment
  JEPS98417  Eleocharis acicularis Lowell Ahart 2000-6-5 8447 Butte On the N margin of a large wash, ca 100 yards W of the road crossing, Peter Ahart Ranch, ca 1 3/4 miles N and 1 1/4 miles E of Honcut, ca 12 miles (air) SE of Oroville. 36 Comment
  JEPS98467  Eleocharis acicularis Lowell Ahart 2000-9-15 8690 Butte 2 mi SE of Ordbend (N of a large pond on E side of Sacramento River, NW of Parrott Landing, 1 mi SE of Ord Ferry, 12 air miles SW of Chico) 32 Comment
  JEPS123954  Eleocharis acicularis var. acicularis Lowell Ahart, John Dittes, Josephine Guardino, Steve Green 2015-7-31 20411 Tehama East of County Road 769, 2.05 air miles east of intersection of State Highway 36 and Wilson Lake Road, 2.32 air miles north-northeast of Gurnsey Creek Campground, 10.74 air miles south-southeast of Lassen Peak. Comment
  CDA38954  Eleocharis acicularis var. acicularis L. Ahart 2000-9-15 8690 Butte North of a large pond on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. Comment
  CDA38956  Eleocharis acicularis var. acicularis L. Ahart 2000-5-11 8338 Butte Along a small wash, about 100 yards south of a dirt road, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/2 miles east of Honcut, about 12 miles (air) southeast of Oroville. Comment
  JEPS98319  Eleocharis acicularis var. occidentalis Lowell Ahart 2000-6-17 8487 Butte 7 air mi N of Oroville Oroville (North Table Mountain, W side of Cherokee Rd, large spring-like area, W of the lone oak tree, W of the cow shute and large parking area) 403 Comment
  CAS-BOT-BC113639  Eleocharis acicularis var. occidentalis Lowell Ahart 1980-4-28 2110 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CAS-BOT-BC113454  Eleocharis bella Lowell Ahart 1981-8-15 3030 Butte Ca. 1.5 miles S of Snag Lake (ca. 3 mi S of Jonesville). 1726 Comment
  CHSC116314  Eleocharis bella Lowell Ahart 2015-11-19 20672 Yuba 100 yards or more north of the spillway area, below the high water line, west side of Lake Francis, about 1 1/2 miles south of Dobbins. 512 Comment
  CHSC31664  Eleocharis bella L. Ahart 1980-9-8 2594 Butte Bottom of a small wash in one of the pasture fields, ca. 1.5 mi n and 1.5 mi e of Honcut. Peter Ahart Ranch, Honcut. 50 Comment
  CHSC78297  Eleocharis bolanderi Lowell Ahart 2000-6-23 8505 Yuba In a small meadow, about 80 yards east of the meadow along La Porte Road, about 100 yards north of Scales Road, about 3 miles northeast of Strawberry Valley. 1219 Comment
  JEPS98607  Eleocharis bolanderi Lowell Ahart 2000-6-19 8494 Yuba Meadow, ca 80 yards N of New York Flat Road, ca 1 1/4 miles (air) NE of Brownsville, ca 2 1/4 miles (air) W of Challenge. 731 Comment
  CHSC39542  Eleocharis engelmannii Lowell Ahart 1983-6-6 4027 Butte Peter Ahart Ranch, about 2 1/4 miles north and 1/4 mile east of Honcut. 50 Comment
  JEPS102596  Eleocharis engelmannii Lowell Ahart 2001-10-16 9376 Plumas On the north side of a bank and a small stream, on the NW side of Round Valley Reservoir, about 2 1/2 miles SW of Greenville. 1363 Comment
  CAS-BOT-BC113375  Eleocharis engelmannii Lowell Ahart 1986-11-9 5448 Butte Ca. 1/10 mi S of the clay burrow for Oroville Dam, 1/4 mi E of Larkin Road, 36 Comment
  CHSC84597  Eleocharis flavescens var. flavescens Lowell Ahart; John Dittes 2003-9-17 10600 Tehama On a gravel bar on the south side of Deer Creek, about 400 yards east of Highway 99, about 5 miles (air) southeast of Los Molinos. 60 Comment
  CHSC102733  Eleocharis macrostachya Lowell Ahart 2009-7-4 15997 Butte On the bottom of a pond, on the west side of the gravel road, about 100 yards south of parking lot 3, Gray Lodge Watefowl Management Area, about 6 miles (air) southwest of Gridley. 21 Comment
  CHSC31666  Eleocharis macrostachya L. Ahart 1972-6-20 114 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC45143  Eleocharis pachycarpa Lowell Ahart 1975-6-19 793 Butte Along the edges of North Honcut Creek, Peter Ahart Ranch, about 1 1/4 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  CDA2608  Eleocharis pachycarpa L. Ahart 2000-5-24 8389 Butte On the east side of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. Comment
  HSC97766  Eleocharis pachycarpa L. Ahart 2000-5-23 8387 Butte Large wash NE of pond, 1/8 mi. N of La Porte Rd., 1/2 mi. SE of Honcut Cemetery, 4 mi. NE of Honcut, 13 mi. SE of Oroville 55 Comment
  CHSC80884  Eleocharis parishii Lowell Ahart; Vernon H. Oswald 2001-7-11 8890 Plumas Meadow, on the east side of the dirt road, about 1/4 mile northwest of Hauns Meadow and Hauns Creek, about 3 miles (air) east of Lake Almanor, about 5 miles (air) northwest of Greenville. 1447 Comment
  JEPS102741  Eleocharis parishii Lowell Ahart and Vernon H. Oswald 2001-7-11 8890 Plumas Meadow, on the east side of the dirt road, about 1/4 mile NW of Hauns Meadow and Hauns Creek, about 3 miles (air) east of Lake Almanor, about 5 miles (air) NW of Greenville. 1447 Comment
  JEPS104048  Eleocharis parishii Lowell Ahart 2003-7-14 10382 Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  JEPS104221  Eleocharis parishii Lowell Ahart 2003-6-11 10269 Tehama Seep on the w side of Battle Creek, ca 1 mi n of Manton Rd, ca 1 1/2 mi (air) ne of the Colman Power House, ca 5 mi (air) wsw of Darah Springs State Fish Hatchery, ca 10 mi (air) ene of Cottonwood. 153 Comment
  HSC97764  Eleocharis parishii L. Ahart 2000-5-30 8409 Butte 1/4 mi. NE of Kunkle Reservoir, E of Pentz Magalia Rd., 2 mi. S of Paradise 549 Comment
  CHSC45178  Eleocharis quinqueflora Lowell Ahart 1970-4-4 39 Butte On the bottom of a small wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/2 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC78205  Eleocharis quinqueflora Lowell Ahart 2000-5-21 8384 Plumas About 200 feet northwest of the pond, Butterfly Valley, about 5 miles (air) northwest of Quincy. 1005 Comment
  CHSC78314  Eleocharis quinqueflora Lowell Ahart 2000-7-13 8589 Sierra In a small boggy meadow, on a upper west branch of Black Jack Ravine, on the west side of Forest Highway 98, Harris Meadow, about 7 miles (air) northeast of Alleghany. 1615 Comment
  JEPS102457  Eleocharis quinqueflora Lowell Ahart and Vernon H. Oswald 2001-7-11 8889 Plumas Meadow, on the east side of the dirt road, about 1/4 mile NW of Hauns Meadow and Hauns Creek, about 3 miles (air) east of Lake Almanor, about 5 miles (air) NW of Greenville. 1447 Comment
  JEPS104218  Eleocharis quinqueflora Lowell Ahart 2003-5-28 10231 Butte Edges of a large vernal pool, ca 100 feet w of Hendricks ditch, ca 1 3/4 mi nw of the iron gate and fence, nw of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 271 Comment
  JEPS107555  Eleocharis quinqueflora Lowell Ahart 2005-7-31 12239 Nevada Along a small drainage, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit 2062 Comment
  SEINET7587011 Image available Eleocharis quinqueflora Lowell Ahart 2000-5-30 8411 Butte About 1/4 mile northeast of Kunkle Reservoir, east of the Pentz Magalia Road, about 2 miles south of Paradise. 549 Comment
  CHSC78927  Eleocharis radicans Lowell Ahart 2000-10-2 8698 Butte Northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS98722  Eleocharis rostellata Lowell Ahart 2000-6-21 8501 Butte In a large seep, on the west side of the dirt road at Parking Area L, just west of the Diversion Dam, Upper Bidwell Park, about 2 1/2 miles (air) northeast of Manzanita Avenue, Chico. 106 Comment
  CHSC69737  Eleusine indica Lowell Ahart 1997-10-25 7946 Butte Lawn, at the Butte County Historical Society museum, Oroville. 60 Comment
  CHSC106104  Elodea canadensis Lowell Ahart; John Dittes 2010-7-30 16964 Siskiyou In the Shasta River, about 30 yards northwest of the East Louie Road Bridge, Shasta Big Springs Ranch, 1.6 miles (air) southwest of Big Springs Lake, 4.6 miles (air) northwest of Dwinnel Dam, 5.7 miles (air) southeast of Grenada. 716 Comment
  CHSC91268  Elymus caput-medusae Lowell Ahart; Jack Lindsay 2005-5-31 11841 Sutter In a large vernal pool, pasture, on the north side of the dirt private road, about 1/2 mile north of Malott Road, about 2 miles (air) northeast of Sutter. 19 Comment
  CHSC97467  Elymus elymoides subsp. californicus Lowell Ahart; John Dittes 2007-6-17 14196 Plumas West of Red Clover Creek, about 20 yards east of County Road 111 (Beckwourth Genesee Road), about 1/4 mile east of bridge across Red Clover Creek, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1654 Comment
  RSA715960  Elymus elymoides subsp. californicus L. Ahart, John Dittes 2005-6-9 12019 Siskiyou On the east side of a poor rock fence, about 350 yards E of where cattle water in the Shasta River, about 3/5 mile (air) south of Highway 99/97 Cutoff, about 2.5 miles (air) ESE of Grenada. 775 Comment
  CAS-BOT-BC203730  Elymus glaucus subsp. glaucus Lowell Ahart 1986-5-24 5297 Sutter About 1/2 mile south of the Dean Cabin, Dean Ranch, about 3 1/4 miles north-west of Sutter, Sutter Buttes 243 Comment
  CAS-BOT-BC203731  Elymus glaucus subsp. glaucus Lowell Ahart 1985-10-19 5212 Sutter On the rocky north side of Little North Butte, about 1/2 mile north of the Dean Cabin, Dean Ranch, Sutter Buttes 320 Comment
  CHSC108216  Elymus glaucus subsp. glaucus Lowell Ahart 2011-6-7 17423 Yuba West of a willow shrub, just south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  JEPS106353  Elymus glaucus subsp. glaucus Lowell Ahart 2004-8-17 11378 Nevada Near the east margin of a small snow lake, on the north side of Jackson Creek, about 300 yards east of Jackson Lake, at the north base of English Mountain 2058 Comment
  JEPS118046  Elymus glaucus subsp. glaucus Lowell Ahart 2011-6-7 17423 Yuba West of a willow shrub, just south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville 66 Comment
  CHSC47642  Elymus multisetus Lowell Ahart 1984-5-21 4635 Sutter Rock outcropping where the road forks to go to each radio tower, near the lower radio tower on the South Butte, Sutter Buttes. 579 Comment
  CAS-BOT-BC213797  Elymus repens Lowell Ahart 1982-7-10 3668 Butte Found about 1/12 mile west of the Gray Lodge check in station and on the north side of the dirt road, about 12 miles southwest of Gridley 35 Comment
  CHSC42952  Elymus stebbinsii subsp. septentrionalis Lowell Ahart 1987-7-8 5805 Butte Along Big Bar Mountain Road, about 1 mile south-west of Coyote Gap, about 5 miles east of Pulga. 1280 Comment
  JEPS104068  Elymus stebbinsii subsp. septentrionalis Lowell Ahart 2003-7-2 10341 Yuba about 200 yds S of the 4-H Camp, on W side of Oregon Hill Road, about 1/2 mi N of Marysville Road, about 2 air mi NE of Dobbins 815 Comment
  CHSC112048  Elymus trachycaulus subsp. trachycaulus Lowell Ahart; John Dittes 2012-7-9 18297 Lassen On dry soil, on the south side of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC93530  Elytrigia intermedia subsp. barbulata Lowell Ahart; John Dittes 2005-6-10 12121 Siskiyou North side of the corral, end of Salvadori Road, Nelson Ranch, about 1 1/4 miles (air) south of Highway 99/97 Cutoff, about 5 1/4 miles (air) east-southeast of Grenada. 785 Comment
  JEPS115892  Elytrigia intermedia subsp. barbulata Lowell Ahart, John Dittes, Josephine Guardino 2009-7-22 16131 Plumas On the west side of Forest Service Road 27N92K, east side of Long Valley, about 3.5 miles (air) west-southwest of Greenville, about 5.2 miles (air) southeast of Lake Almanor Dam 1606 Comment
  CHSC99973  Elytrigia intermedia subsp. intermedia Lowell Ahart 2008-9-10 15370 Plumas On the north side of East Branch Creek, on the south side of the Quincy La Porte Road, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte. 1593 Comment
  JEPS107604  Elytrigia intermedia subsp. intermedia Lowell Ahart, Josephine Guardino 2005-8-10 12310 Plumas Along a poor logging road, northeast of a small branch of Lights Creek, east side of Forest Road 27N54, about 5 1/2 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake 1821 Comment
  CHSC45419  Enemion occidentale Lowell Ahart 1971-3-26 67 Butte Along Swedes Flat Road, about 1 mile east of Oroville Bangor Highway. 243 Comment
  RSA715839  Epilobium angustifolium subsp. circumvagum L. Ahart 2005-7-23 12182 Nevada Under power lines, about 100 yards west of the paved road, SW of Lake Spaulding, about 1/2 mile N of Highway 20. 1573 Comment
  CDA38055  Epilobium brachycarpum L. Ahart, John Dittes 2005-9-2 12460 Plumas On the south side of Forest Road 27N34, about 1 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. Comment
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Oct 5 2019
  JEPS115383  Epilobium brachycarpum Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16330 Tehama On the east side of Forest Service Road 29N25A, Childs Meadows, about 2600 ft south of the intersection of Highway 36 (89) and Forest Service Road 29N25A, 2.3 miles (air) northeast of the town of Mill Creek, 9.1 miles (air) south of Lassen Peak. In area b 1493 Comment
  RSA0105468  Epilobium brachycarpum Lowell Ahart 2014-8-26 19784 Plumas On the north side of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4, miles (air) north of La Porte. 1533 Comment
  RSA724891  Epilobium brachycarpum L. Ahart 2006-8-22 13218 Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CHSC41468  Epilobium campestre Lowell Ahart 1986-5-26 5322 Sutter Along West Butte Road, about 1/2 mile north of the Sacramento Outing Club, Sutter Buttes. 30 Comment
  CHSC81135  Epilobium campestre Lowell Ahart 2001-8-29 9229 Plumas On the bottom of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 Comment
  SBBG125475  Epilobium campestre L. Ahart, J. Dittes 2012-7-11 18331 Modoc N edge of a meadow, ca. 1/8 mi E of the parking area on E side of Elkins Lane, Ash Crk State Wildlife Area, ca. 4 mi W of Adin, ca. 8 mi NE of Bieber, Big Valley 1266 Comment
  CHSC113892  Epilobium canum subsp. latifolium Lowell Ahart 2014-8-24 19755 Plumas Center of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. 1533 Comment
  JEPS102646  Epilobium canum subsp. latifolium Lowell Ahart 2001-8-28 9183 Tehama Along a small dry stream, on the east side of Highway 32 and SE of the intersection with road 390 - G of Sierra Pacific Industries, about 4 miles by road south of bridge across Deer Creek. 1219 Comment
  JEPS118389  Epilobium canum subsp. latifolium Lowell Ahart 2011-9-17 17674 Plumas On the south side of the paved road, about 50 yards south of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 1/8 mile west of Little Grass Valley Reservoir 1595 Comment
  CHSC106268  Epilobium ciliatum subsp. ciliatum Lowell Ahart; John Dittes 2010-7-30 16952 Siskiyou Along the south edge of the Shasta River, about 100 yards east of the East Louie Road Bridge, Shasta Big Springs Ranch, 1.6 miles (air) southwest of Big Springs Lake, 4.6 miles (air) northwest of Dwinnel Dam, 5.7 miles (air) southeast of Grenada. 716 Comment
  CHSC113122  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2013-11-17 19265 Butte Along the sides of McCabe Creek, below the high water line of Lake Oroville, about 5/8 of a mile southwest of the Enterprise Bridge across Lake Oroville. 245 Comment
  CHSC113888  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2014-8-24 19756 Plumas Center of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. 1533 Comment
  CHSC82562  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2002-7-18 9869 Plumas In a small meadow, on the south side of a small upper branch of Fall River, about 100 yards north of Lumpkin Ridge Road, about 1 mile (air) southeast of Tamarack Flat, about 1/4 mile southwest of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, about 1 1/2 miles (air) northwest of Little Grass Valley Reservoir dam, about 4 1/2 miles (air) northwest of La Porte. 1701 Comment
  JEPS105965  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2004-6-28 11128 Tehama Gravel bar on the south side of Thomes Creek, about 1/4 mile east of Paskenta 213 Comment
  CHSC65343  Epilobium ciliatum subsp. glandulosum Lowell Ahart 1995-10-1 7650 Plumas On the bottom of a pond, (reservoir dam washed out), Onion Valley, east of Quincy La Porte Road, about 1 mile north-west of Pilot Peak. 1828 Comment
  CHSC91937  Epilobium ciliatum subsp. glandulosum Lowell Ahart; Josephine Guardino 2005-8-9 12286 Plumas On the bottom of Fant Creek, about 100 yards southeast of the cabin (destroyed) and corral, north of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1597 Comment
  CHSC92033  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2005-8-30 12340 Sierra On a gravel bar, on the east side of Pass Creek, about 1/8 mile south of French Meadow, about 2 1/2 miles west of Webber Lake. 2032 Comment
  CHSC94301  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2006-7-25 13076 Tehama In a small meadow on the west side of the road, about 20 yards east of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows. 1518 Comment
  CHSC111153  Epilobium cleistogamum Lowell Ahart 2012-6-4 18154 Butte Peter Ahart Ranch, about 2 1/4 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC46144  Epilobium cleistogamum Lowell Ahart 1978-5-15 1728 Butte On the bottom of a vernal pool, in a pasture field, Peter Ahart Ranch, about 2 1/4 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC112109  Epilobium densiflorum Lowell Ahart 2012-6-5 18160 Butte On the sides of the small stream, on the bottom of Beatson Hollow, about 1-1/4 miles northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 6 miles (air) north of Oroville. 273 Comment
  CHSC34311  Epilobium densiflorum L. Ahart 1981-9-6 3087 Plumas Along Indian Creek, ca. 1/2 mi sw of the jct of Hwy 89 and Arlington Rd, ca. 1.5 mi sw of Crescent Mills. 1200 Comment
  CHSC37183  Epilobium densiflorum L. Ahart 1982-6-20 3641 Sutter On sides of a small stream, ca. 1/4 mi nw of the Dean Cabin, Dean Ranch, Sutter Buttes. 350 Comment
  CHSC39343  Epilobium densiflorum Lowell Ahart 1983-6-26 4149 Butte Found along the edge of Ponderosa Way, about 1 1/2 miles south-east of the East Fork of Canyon Creek, about 14 1/2 miles north-east of Oroville. Note: the sign gives Big Ridge Road instead of Ponderosa Way. 575 Comment
  JEPS102574  Epilobium densiflorum Lowell Ahart 2001-8-10 9082 Sierra On the west side of the dam, diversion dam across the Little Truckee River (water flows to Sierra Valley), about 100 yards south of Fiberboard Road (Forest Road 18), about 1/8 mile north of Henness Pass Road, about 5 miles (air) east of Webber Lake. 1920 Comment
  JEPS124094  Epilobium densiflorum Lowell Ahart 2015-6-7 20221 Plumas Lava Top, about 2 1/4 miles (air) north of the bridge across Fall River, about one mile southeast of Cascade, about 7 miles (air) northeast of Feather Falls, about 10 miles (air) west of La Porte. Comment
  JEPS124379  Epilobium densiflorum Lowell Ahart, John Dittes 2015-7-13 20307 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  SBBG119942  Epilobium densiflorum L. Ahart 2006-8-9 13140 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  SBBG121213  Epilobium densiflorum L. Ahart 2007-7-20 14352 Plumas strand of Lake Davis ca. 100 yards SE of Long Point, NE side of Lake Davis 1763 Comment
  SEINET13709907  Epilobium densiflorum Lowell William Ahart, Lowell William Ahart 2001-1 9082 Sierra Little Truckee River, 5 Air Mi. E of Webber Lake (T19N, R15E, sec 15, SW 1/4) 6300 Ft. 1920 Comment
  CHSC61325  Epilobium glaberrimum Lowell Ahart 1993-7-22 7091 Butte Along Fall River, on the east side of the campground road, about 1/4 mile north-west of the bridge across Fall River, about 6 (air) miles north-east of Feather Falls. 1036 Comment
  CHSC118534  Epilobium glaberrimum subsp. glaberrimum Lowell Ahart; John Dittes, Josephine Guardino 2017-6-27 21435 Nevada Drainage on mountainside, about 200 yards north of Carpenter Meadow, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. 1938 Comment
  CHSC88155  Epilobium glaberrimum subsp. glaberrimum Lowell Ahart 2004-7-27 11316 Plumas Along Hopkins Creek, about 200 yards north of the fork of Hopkins Creek and the East Branch of Hopkins Creek, about 3/4 mile south of Turkeytown, about 1 mile (air) southwest of Blue Nose Mountain, about 10 miles (air) northeast of La Porte. 1645 Comment
  CHSC58932  Epilobium hornemannii subsp. hornemannii Lowell Ahart 1992-7-26 6854 Butte In a small stream, about 1/2 mile north of the Carr Mine, about 2 (air) miles south of Snow Mountain. 1798 Comment
  JEPS113195  Epilobium pallidum Lowell Ahart, John Dittes, Andrea Craig 2007-5-13 13832 Tehama Bottom of a shallow vernal pool or swale, about 120 feet east of a poor dirt road, about 100 yards north of Manton Road, about 3.9 miles east northeast of the intersection of Manton Road and Wildcat Road, about 2 miles (air) southwest of Manton 256 Comment
  RSA795889  Epilobium pallidum L. Ahart 2012-6-2 18145 Tehama East side of Long Road, about 6.7 miles northeast of Dales and State Highway 36, northeast of Red Bluff. 326 Comment
  CDA34216  Epilobium pygmaeum L. Ahart, J. Dittes 2010-8-3 17058 Modoc About 10 yards east of the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. Comment
  RSA795598  Epilobium pygmaeum L. Ahart, John Dittes 2010-8-30 17058 Modoc On the sides of a small wash, about 10 yards east of the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2300 feet north of Lassen County Line, about 3.6 air miles west of Adin, about 8.0 air miles northeast of Bieber, Big Valley. 1268 Comment
  CDA42893  Epilobium torreyi L. Ahart 2012-6-5 18157 Butte Along the poor dirt road, on the south side of Beatson Hollow, about 3/4 mile northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 6 miles (air) north of Oroville. Comment
  CHSC113343  Epilobium torreyi Lowell Ahart; John Dittes 2014-5-16 19480 Tehama Along the sides of the poor dirt road, about 200 yards southwest of the lone oak tree, about 1/2 mile east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. 99 Comment
  CHSC46148  Epilobium torreyi Lowell Ahart 1974-6-5 476 Butte In a wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC90982  Epilobium torreyi Lowell Ahart 2005-5-11 11795 Butte Swales between vernal pools, south part of North Table Mountain, about 200 yards northwest of the poor dirt road off of Cherokee Road, about 200 yards south of the rim into Beatson Hollow, about 7 miles (air) north of Oroville. 358 Comment
  RSA0045628  Epilobium torreyi Lowell A. Ahart 2012-5-31 18125 Butte About half way between Salmon Hole trail and Parking Area O, Upper Bidwell Park. 122 Comment
  SBBG126103  Epilobium torreyi L. Ahart 2012-6-5 18157 Butte dirt rd, on S side of Beatson Hollow, ca 0.75 mi NW of the iron gate on the N side of Cherokee Rd, N Table Mtn, ca 6 mi N of Oroville 298 Comment
  JEPS128638  Epipactis gigantea Lowell Ahart, John Dittes 2017-7-19 21561 Nevada About 200 yards north of Carpenter Meadow, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. Comment
  JEPS110232  Equisetum arvense Lowell Ahart 2006-8-22 13211 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS116125  Equisetum hyemale subsp. affine Lowell Ahart, John Dittes 2009-7-27 16162 Plumas On damp soil, high area in a small pond, headwaters of Grizzly Gulch, 2.1 miles (air) northeast of Butt Valley Reservoir Dam 1479 Comment
  CHSC51033  Eragrostis cilianensis Lowell Ahart 1990-7-15 6556 Butte Along a stream, below the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/4 mile north-west of the Enterprise Bridge across Lake Oroville. 243 Comment
  UC1562282  Eragrostis cilianensis Lowell Ahart 1990-8-15 6583 Butte 0.5 mi sw Enterprise Bridge across Lake Oroville (near McCabe Creek, below the high water line); Lake Oroville 228 Comment
  JEPS95948  Eragrostis hypnoides Lowell Ahart 1999-8-13 8151 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  UC1562294  Eragrostis hypnoides Lowell Ahart 1990-7-15 6557 Butte about 1.25 mi nw Enterprise Bridge across Lake Oroville (e of Enterprise Boat Launch Area, just below the high water line of Lake Oroville); Lake Oroville 243 Comment
  CHSC102726  Eragrostis pectinacea var. pectinacea Lowell Ahart 2009-8-13 16278 Butte In the channel about 100 yards east of the diversion structure that controls Mud Creek diversion and Lindo Channel, northeast of Hooker Oak, Upper Bidwell Park, Chico. 68 Comment
  CHSC112736  Eragrostis pectinacea var. pectinacea Lowell Ahart 2013-10-12 19105 Butte On the east side of Palermo Honcut Highway, about 20 yards south of Palermo Road, Palermo. 51 Comment
  JEPS94364  Eragrostis pectinacea var. pectinacea Lowell Ahart 1997-8-13 7867 Yuba about 2 1/4 air mi e of Browns Valley (on s side of Scott Forbes Road, 1/4 mi e of intersection of Scott Forbes Road and Peoria Road, just e of Gray Drive); Scott Forbes Road 91 Comment
  JEPS120679  Eragrostis pilosa var. pilosa Lowell Ahart 2013-10-19 19174 Glenn Between the river and the large gravel bar, along the west side of the Sacramento River, southwest of the boat launch area, west of Butte City. Comment
  RSA768854  Eremocarpus setiger L. Ahart, John Dittes 2008-8-21 15265 Merced About 10 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CHSC29982  Eremogone cliftonii Lowell Ahart 1980-5-29 2362 Butte 2.5 miles NE of Mountain House, short distance from Oroville-Quincy Highway. Along edge of dirt road. 1100 Comment
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Jul 8 2014
  CHSC30859  Eremogone cliftonii L. Ahart 1980-9-10 2636 Butte Along the edge of the road, ca. 3 mi ne of Millsap Bar, ca. 27 mi ne of Oroville. 1100 Comment
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Jul 8 2014
  CAS-BOT-BC131515  Ericameria arborescens Lowell Ahart 1976-10-13 s.n. Butte 0.25 mile west of Pinkard Creek which is about 2 miles northwest of The Sly Creek Reservoir Comment
  CHSC24427  Ericameria arborescens Lowell Ahart 1976-10-13 Butte 1/4 mi w of Pinkard Creek, ca. 2 mi nw of the Sly Creek Reservoir, along road. 762 Comment
  RSA702859  Ericameria arborescens L. Ahart 2004-10-14 11470 Lake South side of Cache Creek, on the south side of Bartlett Springs Road (Road M 12), about 2 miles W of the NW part of Indian Valley Reservoir. 477 Comment
  CHSC105779  Ericameria bloomeri Lowell Ahart 2010-9-15 17156 Sierra Open areas, around trees, about 20 yards southeast of the cabin, about 20 yards southeast of the upper pond, at the spring, about 2 3/4 miles (air) north of Yuba Pass on Highway 49, about 4 miles (air) east of Haskell Peak. 2134 Comment
  CAS-BOT-BC292829  Ericameria cuneata var. cuneata Lowell Ahart 1986-10-23 5409 Nevada Along the dirt road on the north side of Bowman Lake 1706 Comment
  CHSC105644  Ericameria nauseosa var. speciosa Lowell Ahart; John Dittes 2010-10-5 17300 Sierra On the east side of Antelope Valley road, about 100 yards south of Highway 49, 3.6 miles (air) west of Loyalton, 6.8 miles (air) northeast of Sierraville. 1498 Comment
  CHSC115350  Erigeron canadensis Lowell Ahart 2015-2-20 19935 Butte Above the retaining wall, just north of the railroad underpass, on the west side of Hountoon Street, Oroville 68 Comment
  CAS-BOT-BC295164  Erigeron inornatus Lowell Ahart 1983-7-29 4245 Butte About 1 mile east of Milsap Bar, about 25 miles north-east of Oroville 750 Comment
  CHSC37223  Erigeron miser L. Ahart 1982-7-28 3699 Sierra Cliffs, ca. 1/4 mi n of Pacific Mine, ca. 5 mi e of LaPorte. 1700 Comment
  CDA5862  Erigeron philadelphicus L. Ahart, J. Dittes 2005-6-1 12082 Siskiyou About 90 yards east of the pump house along the Shasta River, about 1.9 miles (air) south of Highway 99/97 cutoff, about 6 miles (air) east-southeast of Grenada. Comment
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Oct 5 2019
  CHSC88916  Eriochloa acuminata var. acuminata Lowell Ahart 2004-8-30 11397 Butte In a young peach orchard, on the south side of O'Brien Road, about 100 yards east of Gilstrap Avenue, about 1 1/2 miles (air) southeast of Gridley. 28 Comment
  JEPS106154  Eriochloa acuminata var. acuminata Lowell Ahart 2004-9-14 11400 Butte On the east side of Palermo Honcut Highway, about 20 feet south of Palermo Road, east part of Palermo 57 Comment
  CHSC75808  Eriogonum incanum Lowell Ahart; Vernon H. Oswald 1999-7-26 8106 Nevada On the north side of Grouse Ridge Road (Road 14) and northeast of the Lookout, about 6 miles northeast of Bowman Lake Road (Road 18), about 4 miles (air) south of Bowman Lake. 2316 Comment
  CHSC25499  Eriogonum lobbii L. Ahart 1977-8-2 Plumas Ca. 1 mi w of Pilot Pk., which is ca. 15 mi ne of La Porte. 2000 Comment
  JEPS95887  Eriogonum marifolium Lowell Ahart 1999-7-26 8106 Nevada on the north side of Grouse Ridge Road (Road 14) and northeast of the Lookout; about 6 miles northeast of Bowman Lake Road (Road 18); about 4 miles (air) south of Bowman Lake 2316 Comment
  UC1594721  Eriogonum marifolium Lowell Ahart 1992-7-29 6892 Butte about 1 mi e, about 1/2 mi nw of Lotts Lake Carr mine 1828 Comment
  CHSC78526  Eriogonum nudum var. nudum Lowell Ahart 2000-8-10 8642 Nevada Gravel bars along Fall Creek, about 1/8 mile east of where Fall Creek crosses Forest Highway 18, or Bowman Lake Road, about 5 miles (air) or 8 miles by road north of Highway 20 and Bear Valley. 1706 Comment
  JEPS117570  Eriogonum nudum var. nudum Lowell Ahart, John Dittes 2010-7-31 16983 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CHSC31772  Eriogonum roseum Lowell Ahart 1974-9-30 639 Butte Near North Honcut Creek, Peter Ahart Ranch, Honcut. 45 Comment
  CHSC51009  Eriogonum roseum Lowell Ahart 1990-8-15 6591 Butte Below the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/2 mile north-west of the Enterprise Bridge across Lake Oroville. 274 Comment
  CHSC80679  Eriogonum tripodum Lowell Ahart 2001-6-14 8840 Tehama About 300 yards north of road M2, and north of the poor dirt road that is used to service the power poles, about 8.5 miles west of Paskenta. 640 Comment
  CAS-BOT-BC267907  Eriogonum umbellatum Lowell Ahart 1981-7-7 2929 Butte About 0.5 mile west of the Forbestown Reservoir, north-east of Forbestown 750 Comment
  CHSC99123  Eriogonum umbellatum var. modocense Lowell Ahart; John Dittes 2008-6-19 14882 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS114530  Eriogonum umbellatum var. modocense Lowell Ahart 2008-8-13 15192 Plumas On and around rocks. about 100 yards north of Kenzie Ravine and the road, about 1/2 mile east of Little Grass Valley Reservoir, about 4 miles (air) northeast of La Porte 1598 Comment
  RSA715993  Eriogonum umbellatum var. nevadense L. Ahart, John Dittes 2005-6-2 11980 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Rd. and Highway 70, 5.7 mi. (air) northwest of Halleluiah Junction. 1411 Comment
  CHSC106083  Eriogonum umbellatum var. polyanthum Lowell Ahart; John Dittes 2010-7-31 16988 Lassen About 2300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC42490  Eriogonum ursinum var. ursinum Lowell Ahart 1987-5-27 5717 Butte Road cut along Poe Power House Road, about 3/4 mile north-west of the Poe Power House, about 1 1/2 miles south-east of Jarbo Gap. 365 Comment
  CHSC117711  Eriogonum vimineum Lowell Ahart; John Dittes 2016-8-24 21264 Tehama About 40 yards west of the Sacramento River, Anderson River Park, 0.7 miles (air) upstream from Stillwater Creek Confluence 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderson. Undesignated section of San Buenaventura Land Grant. 117 Comment
  CHSC45482  Eriogonum vimineum Lowell Ahart 1981-8-11 3026 Butte Growing on dry gravel bars along North Honcut Creek, about 1 mile north and 3 miles east of Honcut, Peter Ahart Ranch, about 12 miles south of Oroville. 45 Comment
  JEPS107579  Eriogonum wrightii var. subscaposum Lowell Ahart 2005-8-30 12365 Nevada On the old road, south of the old Highway 80, southeast of Donner Pass and Donner Summit 2054 Comment
  CAS-BOT-BC301454  Eriophyllum lanatum var. grandiflorum Lowell Ahart 1977-5-19 s.n. Sutter South Butte 350 Comment
  CDA5418  Eriophyllum lanatum var. grandiflorum L. Ahart 2001-6-8 8761 Tehama On the west side of road M2, about 9 miles west of Paskenta. Comment
  JEPS118306  Erodium botrys Lowell Ahart 2011-6-7 17402 Yuba On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville 66 Comment
  RSA0035334  Erodium brachycarpum Lowell Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-10 17998 Butte On the east side of the horse path, about 100 yards north of the paved park road, west side of the old walnut orchard, south of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  CHSC107349  Erodium cicutarium Lowell Ahart; John Dittes 2011-6-22 17538 Modoc At the Pilot Butte Parking Lot, north edge of Ash Creek Floodplain, 1.1 miles (air) south of County road 87, 7.7 miles (air) west of Adin, 10 miles (air) east of Lookout, Big Valley. 1262 Comment
  CHSC41416  Erysimum capitatum var. capitatum Lowell Ahart 1986-7-8 5349 Plumas About 1 mile north-west of Pilot Peak, about 14 miles north-east of La Porte. 1981 Comment
  CHSC43479  Erythranthe bicolor Lowell Ahart 1976-5-22 1120 Nevada Along Graniteville Road, east of North Bloomfield. 914 Comment
  CHSC101866  Erythranthe breweri Lowell Ahart; John Dittes, Josephine Guardino 2009-6-15 15901 Plumas About 200 yards northwest of Lake Almanor Dam, depression in mined over area. 1421 Comment
  CHSC43504  Erythranthe breweri Lowell Ahart 1977-7-15 1471 Sierra In the meadow on the north side of Mount Fillmore, about 12 miles north-east of La Porte. 2133 Comment
  CHSC43506  Erythranthe breweri Lowell Ahart 1979-7-18 1995 Plumas Near Finger Board Mountain, about 2 miles north-west of Pilot Peak, about 12 miles north of La Porte. 1828 Comment
  CHSC65350  Erythranthe breweri Lowell Ahart 1995-10-3 7659 Tehama Along Willow Creek, about 1 3/4 miles (air) north-east of Jonesville, about 6 1/2 miles (air) north-east of Butte Meadows. 1645 Comment
  CHSC11052  Erythranthe cardinalis Lowell Ahart 1966-8-12 Placer French Meadows. 1676 Comment
  CHSC31872  Erythranthe cardinalis L. Ahart 1975-7-19 904 Butte Along North Honcut Creek on moist soil; Peter Ahart Ranch, Honcut. 45 Comment
  CHSC42717  Erythranthe cardinalis Lowell Ahart 1987-6-9 5723 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC93508  Erythranthe glaucescens Lowell Ahart 2006-5-10 12614 Butte Road cut bank, on the north side of the poor dirt road, Bardees Bar Road, about 100 yards north of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 1/2 miles (air) southwest of Pulga. 354 Comment
  CHSC104814  Erythranthe guttata Lowell Ahart 2010-6-9 16775 Butte On damp to wet soil, bottom of a vernal pool, 10 yards north of the poor dirt road, about 100 yards east of the fence, about 150 yards east of where you park, east of Cherokee Road, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 384 Comment
  CHSC44068  Erythranthe latidens Lowell Ahart 1986-5-4 5251 Sutter Near the first gate to the Dean Ranch, about 1/2 mile north of the intersection of Mallott Road and Alf Road, about 2 miles north-east of Sutter, Sutter Buttes. 30 Comment
  CHSC84192  Erythranthe microphylla Lowell Ahart 2003-7-14 10396 Lake Near a small stream, at Barrel Spring, about 1 1/2 miles (air) south of Bartlett Springs Road, about 2 miles (air) west of Bear Valley. 396 Comment
  CHSC42009  Erythronium multiscapideum Lowell Ahart 1976-4-15 1080 Butte Along Swede's Flat Road, about 2 miles east of the Bangor Oroville Highway, north-east of Bangor. 457 Comment
  CHSC39378  Erythronium purpurascens L. Ahart; P. Ahart 1983-8-17 4336 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. 2000 Comment
  CHSC35307  Eschscholzia caespitosa L. Ahart 1982-3-20 3259 Sutter On steep side of North Butte, n of Dean Cabin, Dean Ranch, Sutter Buttes. Scattered on side of North Butte. 350 Comment
  CHSC58880  Eucephalus breweri Lowell Ahart 1992-7-29 6889 Butte About 1 mile northeast of the Carr Mine, about 3/4 mile northwest of Lotts Lake. 1798 Comment
  JEPS113432  Eucephalus breweri Lowell Ahart, John Dittes 2007-8-9 14445 Plumas About 120 yards east of the road, on the east slope of Mount Ingalls, about 6 miles (air) northwest of the north end of Lake Davis. 2551 Comment
  CHSC115331  Euphorbia crenulata Lowell Ahart 2015-4-10 20011 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. 500 Comment
  SD130438  Euphorbia ocellata Lowell Ahart 1981-9-10 3125 Sutter Sutter Buttes, south side of South Butte 349 Comment
  UCR263624  Euphorbia serpillifolia subsp. serpillifolia Lowell Ahart 2002-10-9 9966 Yuba Sly Creek Reservoir, below the high water line, ca 1/8 mile southwest of the Day Camp 1073 Comment
  JEPS123894  Euphorbia spathulata Lowell Ahart 2015-4-28 20110 Lake About 1/4 mile (air) west of Walker Ridge Road, about 3 miles (air) southwest of the intersection of Bear Valley Road and Brim Road, about 18 miles (air) west of Williams. Comment
  JEPS95142  Euphorbia spathulata Lowell Ahart 1997-3-25 7714 Butte about 12 air mi se of Oroville (about 2 1/4 mi n and 2 1/2 mi e of Honcut, w of the ditch for the Old Honcut Flume, w of North Hocut Creek) 60 Comment
  CHSC65374  Eurybia integrifolia Lowell Ahart 1995-9-13 7620 Plumas On the north side of Onion Valley, east of Quincy La Porte Road, about 1 mile northwest of Pilot Peak. 1828 Comment
  CAS-BOT-BC312191  Eurybia radulina Lowell Ahart 1983-8-10 4276 Yuba About 2 miles east of Clipper Mills 1000 Comment
  CDA42949  Euthamia occidentalis L. Ahart 2012-10-28 18531 Butte On the north side of Big Chico Creek, south of Table 34, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  RSA699785  Festuca L. Ahart, John Dittes, Josephine Guardino, Robert A. Schlising 2004-7-3 11181 Plumas on the north side of a forest road, about 1/4 mile north of Taylor rock, about 1 mile (air) southwest of Grizzly Peak, about 5 miles (air) south if Taylorsville, about 8 miles (air) northeast of Quincy 2054 Comment
  JEPS107387  Festuca idahoensis Lowell Ahart, John Dittes 2005-6-10 12100 Siskiyou Rocky hillside, north of the rock fence, about 100 yards southeast of the pump house along the Shasta River, about 1.9 miles (air) south of Highway 99/97 Cutoff, about 6 miles (air) east-southeast of Grenada 776 Comment
  CHSC44566  Festuca occidentalis Lowell Ahart 1977-7-26 1497 Plumas Along the logging road to Bunker Hill Creek, about 1/2 mile north-east of the Bunker Hill Mine, about 10 miles north-east of La Porte. 1828 Comment
  JEPS102466  Festuca rubra Lowell Ahart 2001-7-21 8986 Nevada On the south side of the dirt road, in the old sheep corral, NE of Lake Van Norden, about 1 1/2 miles east of Soda Springs. 2063 Comment
  CAS-BOT-BC278627  Festuca subulata Lowell Ahart 1983-6-26 4107 Butte Along Ponderosa Way, ca. 1/8 mi. E of the intersection of the Oroville Quincy Highway and Ponderosa Way, ca. 15 mi. NE of Oreoville [Oroville] 500 Comment
  JEPS119620  Ficus carica Lowell Ahart 2012-6-21 18227 Butte About 20 yards west of the Freeway, Lower Bidwell Park, Chico. Comment
  JEPS95914  Fimbristylis autumnalis Lowell Ahart and Vernon H. Oswald 1999-8-13 8145 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  CAS-BOT-BC63011  Frangula californica subsp. crassifolia Lowell Ahart 1977-5-19 s.n. Sutter South Butte, Sutter Buttes. Valley Grassland. 300 Comment
  JEPS103419  Frangula rubra Lowell Ahart 2002-6-2 9679 Butte Meadow, S of the intersection of Black Bart Road and Forbestown Road, ca 3 miles (air) SW of Forbestown. 670 Comment
  RSA795690  Frangula rubra subsp. rubra L. Ahart 2012-7-28 18395 -A Nevada Meadow on the west side of Pioneer Trail, about 80 yards east of the P.G.E. Pavilion and restrooms, on the east side of Bowman Lake Road, about 30 yards south of the Bear River, Bear Valley. 1434 Comment
  CAS-BOT-BC505285  Fritillaria micrantha Lowell Ahart 1982-4-8 3271 Butte Above the road cut bank along Swedes Flat Road, about 1 mile east of the Bangor Oroville Highway, about 7 miles north of Bangor 350 Comment
  CAS-BOT-BC130402  Fritillaria pinetorum Lowell Ahart 1976-4-15 s.n. Yuba Near the Brownsville Dump, Brownsville Comment
  CHSC112317  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-5-1 18694 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC113047  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-10-1 19067 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS122011  Galium aparine Lowell Ahart 2014-5-8 19444 Tehama On the south side of the paved road to Berris Creek, about 0.4 mile east of the intersection with Black Butte Road, about 12 1/2 miles (air) southwest of Corning. Comment
  JEPS98370  Galium aparine Lowell Ahart 2000-6-29 8534 Butte 5 air miles E of Magalia (Flea Meadow, 1/2 mi W of Flea Mountain, 3 1/2 air miles N of Concow Reservoir) 1036 Comment
  JEPS106192  Galium bifolium Lowell Ahart, John Dittes, Josephine Guardino 2004-5-16 10916 Plumas Along Rinehart Creek, southwest slope of Grizzly Peak, about 1 1/4 miles (air) west of Grizzly Peak, about 8 1/4 miles (air) northeast of Quincy 1940 Comment
  CHSC31421  Galium bolanderi L. Ahart 1980-9-10 2630 Butte Ca. 1 mi NE of Millsap Bar, ca. 25 mi NE of Oroville. 900 Comment
  RSA726312  Galium bolanderi L. Ahart, Lawrence Janeway 2007-7-10 14284 Butte On the N side of Forest Road 21N31Y. About 6/10 mile W of Bald Rock Road. About 17 miles (air) NE of Oroville. 1033 Comment
  CHSC108192  Galium divaricatum Lowell Ahart 2011-6-7 17412 Yuba On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  SEINET10902548  Galium grayanum Lowell Ahart, Peter Ahart 1983-8-17 Ahart 4331 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. Red Fir Forest; 2000 m. 2000 Comment
  JEPS95632  Galium grayanum var. grayanum Lowell Ahart 1994-7-20 7478 Plumas N of the Pacific Crest Trail, N side of Bunker Hill Ridge, about 1/2 mi NW of Mount Etna; ; ; <coords. cont.: NE 1/4>; Plumas or Sierra County 1981 Comment
  CHSC37262  Galium parisiense L. Ahart 1982-6-15 3582 Butte Ca. 1.5 mi E of camp 18, ca. 8 mi E of Feather Falls. 1000 Comment
  JEPS98713  Galium tricornutum Lowell Ahart 2000-5-13 8353 Butte 5 air miles SW of Oroville (margin of Thermalito Afterbay, W side of access road to the boat ramp, W of Larkin Road, 1 1/4 mi S of Oroville airport) 42 Comment
  JEPS122076  Galium trifidum subsp. columbianum Lowell Ahart 2014-7-13 19659 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir Comment
  SEINET10500748  Galium trifidum var. pacificum Lowell Ahart, Peter Ahart 1984-7-19 Ahart 4750 Butte Along the road, about 1 1/2 mile south-east of Bald Mountain, 1/4 mile east of Oak Point, about 5 miles north-east of Stirling City. Comment
  SEINET12331813  Galium trifidum var. pacificum L. Ahart, Ahart, P. 1984-1 4750 Butte about 1.5 mi SE of Bald Mountain, 0.25 mi E of Oak Point, about 5 mi NE of Stirling City 1500 Comment
  CHSC42391  Gamochaeta argyrinea Lowell Ahart 1987-6-9 5738 Butte On the west side of the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS120916  Gamochaeta ustulata Lowell Ahart 2013-5-27 18719 Butte About 50 yards S of the intersection of Forbestown Road and Black Bart Road, about 3.25 air miles SW of Forbestown. Comment
  CAS-BOT-BC303385  Gamochaeta ustulata Lowell Ahart 1984-6-8 4660 Butte Along Ponderosa Way, about 1/8 mile W of the Ponderosa Dam, about 2 miles NW of Forbestown 370 Comment
  CHSC51263  Garrya fremontii Lowell Ahart 1990-10-14 6633 Plumas Growing in dry soil along an improved road, about 1/8 mile south of Cleghorn Bar Road, about 2 1/2 (air) miles west of Finger Board. 1767 Comment
  JEPS114618  Garrya fremontii Lowell Ahart 2008-6-4 14808 Sierra On the north side of Forest Road 98, about 2 miles (air) northeast of Harris Meadow, about 9 1/2 miles (air) northeast of Alleghany 1906 Comment
  JEPS119566  Garrya fremontii Lowell Ahart 2012-2-22 17755 -A Butte On the north side of Guardian Trail, about 100 yards west of Ten Mile House Road, about 1/4 mile west of Highway 32, about 9 miles northeast of Chico. Comment
  CHSC97447  Gastridium phleoides Lowell Ahart 2007-5-12 13827 Yuba Dry bare red soil, about 30 feet south of a culvert, about 50 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 28 Comment
  CAS-BOT-BC283835  Gastridium ventricosum Lowell Ahart 1985-5-5 4912 Sutter About 3/4 mile SE of the Dean Cabin, Dean Ranch, about 3.5 miles NW of Sutter, Sutter Buttes 200 Comment
  CDA38135  Gayophytum diffusum subsp. parviflorum L. Ahart 2003-8-17 10513 Butte North edge of the meadow, about 100 yards northeast of the buildings in Butte Creek House Meadow, about 3 miles northeast of Snag Lake, about 7 miles (air) east of Butte Meadows. Comment
  CHSC97075  Gayophytum diffusum subsp. parviflorum Lowell Ahart; Josephine Guardino 2007-7-21 14368 Plumas Around pine trees, about 10 yards north of a large meadow, about 100 yards east of the bridge, about 50 yards south of the Beckwourth Taylorsville Road, about 2 1/2 miles (air) northwest of the most northwest part of Lake Davis. 1793 Comment
  SBBG119864  Gayophytum diffusum subsp. parviflorum L. Ahart, J. Dittes 2003-8-8 10487 Plumas E side of Beckwourth Calpine Rd, ca. 3 mi S of Beckwourth, Sierra Valley 1482 Comment
  JEPS110208  Gayophytum heterozygum Lowell Ahart 2006-7-16 13004 Butte On the west side of the poor dirt road, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows 1524 Comment
  RSA772435  Gayophytum heterozygum L. Ahart 2010-9-15 17163 Sierra About 20 yrds NW of the cabin, about 50 yrds SW of the middle pond, At the spring, About 2.75 air miles north of Yuba Pass on Hwy 49, about 4 air miles east of Haskell Peak. 2135 Comment
  UC1594730  Gayophytum heterozygum Lowell Ahart 1992-7-26 6851 Butte about 1/2 mi n Carr Mine (about 2 air mi s of Snow Mt., e of a small stream) 1767 Comment
  CHSC80845  Gayophytum humile Lowell Ahart 2001-7-27 9015 Nevada Strand of Prosser Creek Reservoir, south of Commemorative Emigrant Trail, about 1/4 mile east of Highway 89, about 4 miles (air) north of Truckee. 1746 Comment
  CHSC97191  Gayophytum humile Lowell Ahart; John Dittes, Josephine Guardino 2007-6-9 14046 Plumas 150 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1965 Comment
  CDA34698  Genista monspessulana L. Ahart 2010-4-9 16577 Butte Along the northwest side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville. Comment
  JEPS114683  Gentianopsis simplex Lowell Ahart 2008-8-13 15178 Plumas North side of La Porte Road, north of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1613 Comment
  CHSC113300  Geranium dissectum Lowell Ahart 2014-4-9 19341 Butte Bottom of a drying pond, about 100 yards west of the parking area, west end of West Liberty Road, about one mile (air) south of Colusa Highway, about 7 miles (air) southwest of Gridley. 19 Comment
  RSA754945  Geranium purpureum L. Ahart 2008-5-12 14762 Butte East side of Ponderosa Way, about 1 air mile southwest of the Ponderosa Dam, about 2.25 air miles northwest of Forbestown. 671 Comment
  JEPS124076  Geum macrophyllum var. perincisum Lowell Ahart 2015-5-9 20177 Sierra About one mile west of Highway 49, about 2 miles west of Indian Valley. Comment
  CHSC94200  Gilia capitata subsp. mediomontana Lowell Ahart 2006-7-9 12936 Plumas Near a small seep, about 20 yards south of the paved basalt road, about 3 3/4 miles (air) northwest of Tamarack Flat, about 5 3/4 miles (air) northwest of Little Grass Valley Reservoir. 1661 Comment
  SEINET12765127  Gilia capitata subsp. mediomontana Lowell Ahart 2006-7-9 12936 Placer About 3/4 miles (air) northwest of Tamarack Flat, about 5 3/4 miles (air) northwest of Little Grass Valley Reservoir.; 0 1661 Comment
  RSA716272  Gilia malior L. Ahart, John Dittes 2005-6-2 11989 Lassen Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1428 Comment
  CHSC40401  Githopsis pulchella subsp. campestris Lowell Ahart 1985-5-15 4967 Butte West of Lunt Road, about 1/2 mile north of the intersection of Lunt Road and Highway 70, north of Yankee Hill. 502 Comment
  CHSC78135  Githopsis pulchella subsp. campestris Lowell Ahart 2000-5-31 8422 Butte A serpentine ridge, about 200 yards east of where Kunkle Creek enters Lake Oroville, east of the Kunkle Power House, about 3 miles southeast of Paradise. 335 Comment
  JEPS105985  Githopsis specularioides Lowell Ahart 2004-4-29 10795 Tehama On the northeast side of Dead Rabbit Lake, east of the Nomalaki Trail, about 3/4 mile northwest of Bowers Creek, about 1 1/2 miles northwest of Forest Road 23N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta 571 Comment
  CAS-BOT-BC434994  Glinus lotoides Lowell Ahart 1986-11-9 5437 Butte About 1/10 mile south of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miels south-west of Oroville 36 Comment
  JEPS116116  Glyceria borealis Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16344 Tehama On wet dark soil (humus), drying pond, west side of pond, on the east side of Forest Service Road 29N25A, Childs Meadows, about 2,600 feet south of intersection of Highway 36 (89) and Forest Service Road 29N25A, 2.3 miles (air) northeast of the town of Mi 1493 Comment
  CHSC88275  Glyceria declinata Lowell Ahart; Samantha Mackey Hillaire 2004-7-9 11183 Tehama Seep on the north side of the Mill Creek Trail (4E10), north of Mill Creek, about 3/4 mile west of the Black Rock, Black Rock Campground, and Ponderosa Way (Forest Road 28N29), about 26 miles (air) east of Red Bluff. 655 Comment
  JEPS94779  Glyceria declinata Lowell Ahart 1998-6-9 7987 Butte about 7 air mi n Oroville (sw of the lone oak tree, nw of the cow chute along Cherokee Road); North Table Mountain, Cherokee Road 403 Comment
  CHSC44568  Glyceria elata Lowell Ahart 1978-10-4 1815 Plumas Along the edges of Bird Creek, about 4 miles west of Pilot Peak, about 15 miles north of La Porte. 1645 Comment
  CHSC97537  Glyceria elata Lowell Ahart; John Dittes, Josephine Guardino 2007-8-10 14458 Plumas West of a small stream and meadow, about 10 yards south of Beckwourth Gensee Road, there is a small quarry east of a poor road, the meadow and stream, about 2 miles (air) north of the north end of Lake Davis. 1761 Comment
  JEPS120134  Glyceria elata Lowell Ahart 2012-7-28 18397 Nevada On the east side of Pioneer Trail, about 80 yards southeast of the P. G. & E Pavilion and restrooms, on the east side of Bowman Lake Road, about 100 yards south of the Bear River, Bear Valley. Comment
  CDA34553  Gnaphalium canescens subsp. beneolens L. Ahart 2008-11-4 15398 Butte Below the high water line of Lake Oroville, about one mile southeast of the large parking area on the north end of Oroville Dam, about 5 miles (air) northeast of Oroville. Comment
  SEINET10473778  Gnaphalium chilense Lowell Ahart, Peter Ahart 1983-7-29 Ahart 4226 Butte T21N R6E ne sec 2. Ca. 1/4 mi w of Milsap Bar, ca. 25 mi ne of Oroville. Yellow Pine Forest; 500 m. 500 Comment
  RSA725016  Gnaphalium luteoalbum L. Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC115545  Gnaphalium palustre Lowell Ahart; John Dittes 2015-8-5 20469 Tehama East side of Childs Meadow, 150 yards west of Highway 36, 0.69 air-miles northwest of inteersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.2 air-miles east of Doe Mt., 9.77 air-miles south of Lassen Peak. 1498 Comment
  CHSC90949  Gnaphalium palustre Lowell Ahart 2005-4-14 11714 Butte Bottom of a deep drain ditch, about 200 feet east of the railroad tracks, north of Spruce Street, Gridley. 28 Comment
  JEPS102799  Gnaphalium palustre Lowell Ahart 2001-8-29 9246 Plumas On the bottom of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 Comment
  CAS-BOT-BC302657  Gnaphalium palustre Lowell Ahart 1983-10-27 4484 Sierra Near a dirt road that is about 2 miles south-east of Jackson Meadows Res., about 1 mile south of Pass Creek, near Jackson Meadows Res. 2200 Comment
  CHSC108148  Goodyera oblongifolia Lowell Ahart 2011-8-23 17654 Butte On the west edge of the large meadow, Pinkard Creek flows through the meadow, 100 yards north of the corral, about 1 mile north of Lost Creek Reservoir Dam, about 4 miles (air) northeast of Clipper Mills. 1133 Comment
  CHSC32862  Gratiola ebracteata L. Ahart 1980-10-6 2676 Plumas Ca. 1 mi south of La Porte. 1600 Comment
  JEPS114912  Gratiola ebracteata Lowell Ahart 2008-7-9 15063 Plumas Edges of a small pond, south of the road, about 1/2 mile northwest of the dam at Little Grass Valley Reservoir, about 4 miles (air) northwest of La Porte 1689 Comment
  JEPS114993  Grindelia hirsutula Lowell Ahart 2007-11-3 14576 Butte On both sides of the paved road to the Lime Saddle Campground, about 1/4 mile east of Pentz Road, about 1/2 mile southeast of the power house below Kunckle Reservoir, about 5 1/2 miles southeast of Paradise 335 Comment
  CHSC112840  Grindelia nana Lowell Ahart; John Dittes 2013-7-25 18963 Modoc 30 yards north of the east-west fence, south edge of Ash Creek Floodplain, northeast of Patterson Homestead, east of Elkins Lane, 1.0 mile (air) south of County Road 87, 3.14 miles (air) west of Adin, Big Valley. 1267 Comment
  JEPS98981  Gypsophila elegans var. elegans Lowell Ahart 2001-4-15 8726 Butte On the north side of the dirt road east of the large pump, on the south side of Evans-Reimer Road, about 1 mile east of Pennington Road, Gray Lodge Waterfowl Management Area, about 4 miles (air) SW of Gridley. 22 Comment
  CHSC46634  Hackelia nervosa Lowell Ahart 1989-7-2 6354 Plumas North of where the dirt road forks, the south fork leads to the Lookout on Pilot Peak, about 1/4 mile north of Pilot Peak, about 10 miles north-east of La Porte. 2103 Comment
  CHSC75336  Hainardia cylindrica Lowell Ahart 1999-5-21 8067 Butte In a pasture, 50 yards north of Evans Reimer Road, about 7/8 mile east of Pennington Road, about 5 miles (air) southwest of Gridley. 21 Comment
  JEPS115208  Helenium puberulum Lowell Ahart 2009-11-12 16511 Mendocino On the south side of the Russian River, below the high water line of Lake Mendocino, about 200 yards south of Highway 20 230 Comment
  CHSC42463  Helianthella californica var. nevadensis Lowell Ahart 1987-5-22 5669 Butte About 1/8 mile south-east of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls. 1280 Comment
  CHSC37032  Helianthus bolanderi L. Ahart 1982-9-9 3772 Sutter Along banks of wash s of the Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  SBBG119819  Heliotropium curassavicum L. Ahart 2004-10-4 11425 Lake Indian Valley Reservoir, near the stream in the NE part of the reservoir, on the S side of Bartlett Springs Rd 446 Comment
  JEPS120634  Heliotropium curassavicum var. oculatum Lowell Ahart 2013-10-22 19205 Glenn Strand of Stony Gorge Reservoir, near Fig Orchard One, about 1/2 mile southeast of the dam, about 17 air miles northwest of Willows. Comment
  CDA40614  Heliotropium europaeum L. Ahart, John Dittes, Jim Gannon, Lyle Martinez. 2002-11-4 10007 Tehama Jewett Creek, east of Marguerite Road, about 1 1/4 miles (air) southeast of Corning. Comment
  CHSC102400  Heliotropium europaeum Lowell Ahart 2009-8-13 16277 Butte In the channel, about 100 yards east of the diversion structure that controls Mud Creek diversion and Lindo Channel, northeast of Hooker Oak, Upper Bidwell Park, Chico. 68 Comment
  JEPS103458  Heliotropium europaeum Lowell Ahart 2002-11-4 10007 Tehama 1 1/4 air mi SE of Corning (Jewett Creek, E of Marguerite Road) 74 Comment
  CAS-BOT-BC314998  Hemizonella minima Lowell Ahart 1982-6-4 1117 Butte 1 1/2 miles east of Camp 18 about 8 miles east of Feather Falls 1000 Comment
  CHSC87190  Hesperevax acaulis var. acaulis Lowell Ahart 2004-4-4 10710 Butte About 20 yards north of the faint old fence ridge, about 175 yards east of Wilber Road, east-northeast of the high hill crossed by Wilber Road, pasture, about 3 miles (air) west of Thermalito. 48 Comment
  CHSC101325  Hesperevax acaulis var. robustior Lowell Ahart 2009-4-22 15587 Butte West side of Guardians Trail, about 100 yards north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  UCD133079  Hesperevax caulescens L. Ahart 1974-5-20 458 Butte Ahart Ranch, Honcut. 45 Comment
  UCR263626  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  JEPS102431  Hesperolinon tehamense Lowell Ahart 2001-6-8 8779 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  JEPS106306  Heteromeles arbutifolia Lowell Ahart 2004-6-11 11031 Tehama On the south side of the Nomalaki Trail, about 1/4 mile north of Dead Rabbit Lake, about 1 3/4 miles northwest of Bowers Creek, about 2 1/2 miles northwest of Forest Road 23N69 (Mud Flat Road), about 8 miles (air) southwest of Paskenta 382 Comment
  JEPS115158  Heteromeles arbutifolia Lowell Ahart 2009-11-19 16561 Butte Southwest side of the pond, about 40 yards southwest of table, about 110 yareds south of Ten Mile House Road, Upper Bidwell Park, about 1/2 mile (air) west of Highway 32, about 10 miles northeast of Chico 242 Comment
  RSA0072450  Heteromeles arbutifolia L. Ahart 2009-11-19 16561 Butte Southwest side of the pond, about 40 yards southwest of table, about 110 yards south of Ten Mile House Road, Upper Bidwell Park, about 0.5 air mile west of Highway 32, about 10 miles northeast of Chico. 243 Comment
  CAS-BOT-BC55334  Hirschfeldia incana Lowell Ahart 1987-5-6 5509 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles southeast of Jarbo Gap. 274 Comment
  CHSC34030  Hoita macrostachya L. Ahart 1981-7-7 2923 Butte On a springy area ca. 1/2 mi w of Oroville Forbestown Rd on the Black Bart Rd, w of Forbestown. 700 Comment
  JEPS119890  Hoita macrostachya Lowell Ahart 2012-6-5 18159 Butte On the south side of Beatson Hollow, about 1 mile northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 6 miles (air) north of Oroville. Comment
  CHSC25485  Hoita orbicularis L. Ahart 1977-6-17 1428 Butte Growing along North Honcut Creek. Peter Ahart Ranch, Honcut. 50 Comment
  JEPS119957  Holcus lanatus Lowell Ahart 2012-6-14 18193 Butte Dry high bank on the north side of Big Chico Creek, about 30 yards east of Mangrove Avenue, Annie's Glen, Lower Bidwell Park, Chico. Comment
  JEPS120865  Holosteum umbellatum subsp. umbellatum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18728 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC84224  Holozonia filipes Lowell Ahart 2003-7-17 10411 Yuba On the bottom of a stream, on the west side of Smartville road, about 2 miles north of the intersection of Waldo Road and Smartville Road, about 6 miles (air) south of Smartville. 129 Comment
  CAS-BOT-BC281251  Hordeum brachyantherum subsp. brachyantherum Lowell Ahart 1988-6-21 6059 Butte Near the Poe Power House Road, about 1 mile south of Jarbo Gap 609 Comment
  CHSC54574  Hordeum brachyantherum subsp. brachyantherum Lowell Ahart 1991-7-22 6682 Sierra In French Meadow, about 1/4 mile south of Henness Pass Road, about 3 miles north-west of Webber Lake. 2133 Comment
  CHSC80720  Hordeum brachyantherum subsp. brachyantherum Lowell Ahart 2001-6-8 8802 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  UC1609263  Hordeum brachyantherum subsp. brachyantherum Lowell Ahart 1993-5-15 6942 Butte near bridge of Biggs Princeton Road about 3 mi w Biggs (Cherokee Canal); Cherokee Canal 30 Comment
  CDA32410  Hordeum jubatum L. Ahart 2001-8-29 9253 Plumas On the west side of Little Last Chance Creek, on the strand of Frenchman Lake. Comment
  CHSC101672  Hordeum marinum subsp. gussoneanum Lowell Ahart 2009-4-26 15637 Butte On the westside of Guardians Trail, just south of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC103985  Hordeum marinum subsp. gussoneanum Lowell Ahart 2010-5-14 16644 Butte On the west side of the old Humboldt Road, Disc Golf Area, about 150 yards north of the entrance to the Disc Golf Area, about 40 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 395 Comment
  CHSC98842  Hordeum marinum subsp. gussoneanum Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14644 Merced Dry bare soil at bottom of a vernal pool, about 20 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CDA34145  Hordeum murinum subsp. leporinum L. Ahart 2009-4-3 15536 Butte Chico: East of the Cedar grove Parking Area in Lower Bidwell Park. Comment
  CHSC42332  Horkelia californica subsp. dissita Lowell Ahart 1983-6-21 4101 Butte Along a seep at the edge of Bloomer Hill Road, ca 3 mi nw of Oroville-Quincy Hwy, ca 16 mi ne of Oroville. 700 Comment
  CHSC71189  Horkelia californica subsp. dissita Lowell Ahart 1998-6-30 8012 Butte Margins of a seep, southwest of the lone oak tree, west of the cow chute on the west side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  JEPS104035  Horkelia californica subsp. dissita Lowell Ahart 2003-6-29 10318 Yuba Along a wash, on the e side of Ponderosa Way, ca 1 1/2 mi n of La Porte Rd, ca 1 mi (air) w of Brownsville. 701 Comment
  CDA34647  Horkelia fusca subsp. parviflora L. Ahart, John Dittes, Josephine Guardino 2009-7-22 16145 Plumas On the west side of Forest Service Road 27N92K, east side of Long Valley, about 3.5 miles (air) west-southwest of Greenville, about 5.2 miles (air) southeast of Lake Almanor Dam. Comment
  SEINET10970308  Horkelia tridentata Lowell Ahart 1985-5-15 Ahart 5001 Butte 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow of Reservoir. Comment
  CHSC10666  Hosackia incana Lowell Ahart 1970-5-19 Butte Four miles N. E. of Stirling City. 1066 Comment
  CHSC101850  Hosackia nevadensis Lowell Ahart; John Dittes, Josephine Guardino 2009-6-14 15881 Plumas About 300 yards north of Lake Almanor Dam, about 300 yards southwest of Boat Ramp, below the high water line. 1374 Comment
  CHSC113419  Hosackia oblongifolia var. oblongifolia Lowell Ahart 2014-7-13 19666 Butte West part of a large wet meadow (some bog), about 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1638 Comment
  CHSC46636  Hydrophyllum occidentale Lowell Ahart 1989-7-2 6352 Plumas North of where the dirt road forks, the south fork leads to the Lookout on Pilot Peak, about 1/4 mile north of Pilot Peak, about 10 miles north-east of La Porte. 2103 Comment
  CAS-BOT-BC175966  Hypericum Lowell Ahart 1977-6-26 s.n. Butte Peter Ahart Ranch, Honcut. Along edge of North Honcut Creek 50 Comment
  CHSC45901  Hypericum anagalloides Lowell Ahart 1980-7-20 2478 Butte Growing on moist granite soil, near the edges of small seeps, near Bean Creek Road, near the south side of Little Bald Rock, about 15 miles north-east of Oroville. 1005 Comment
  CAS-BOT-BC311404  Hypochaeris radicata Lowell Ahart 1987-10-16 5913 Butte Along Oroville Quincy Highway, along the edge of Madrone Lake 609 Comment
  CHSC45449  Ipomopsis congesta subsp. palmifrons Lowell Ahart 1981-6-23 2868 Sierra North of the road, there is a small red triangle shaped hill to the south of the road, south of Stafford Mountain, about 12 miles north-east of La Porte. 1828 Comment
  CHSC46530  Iris hartwegii subsp. hartwegii Lowell Ahart 1980-5-19 2316 Butte Growing on the ridge east of the Golden Trout Crossing on the South Fork of the Feather River, about 4 miles west of the Sly Creek Dam. 1066 Comment
  JEPS118488  Iris hartwegii subsp. hartwegii Lowell Ahart, John Dittes 2011-6-21 17524 -A Lassen 335 feet northwest of Big Valley Canal, 2.1 miles (air) south of County Road 87, 6.6 miles (air) northeast of Bieber, 7.9 miles (air) west by southwest of Adin, Big Valley 1264 Comment
  CHSC92169  Isoetes howellii Lowell Ahart; John Dittes 2005-9-19 12372 Plumas In Taylor Lake, on the east side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake. 2076 Comment
  JEPS104157  Isoetes howellii Lowell Ahart 2003-5-28 10233 Butte On the bottom of Hendricks ditch, ca 1 3/4 mi w of the iron gate and fence, w of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 271 Comment
  CAS-BOT-BC61870  Isoetes nuttallii Lowell Ahart 1983-6-12 4046 Butte 7 miles south-west of Feather Falls, about 1 mile south of Crystal Hill, near Oregon Gulch, near Lake Oroville 425 Comment
  CHSC116702  Isoetes nuttallii Lowell Ahart 2016-5-24 20850 Butte West side of a large drainage, about 50 yards north of the ditch, about 150 yards south of La Porte Road, about 1/4 mile southwest of the intersection of La Porte Road and Loma Rica Road, about 3 1/4 miles (air) northeast of Honcut. 44 Comment
  CHSC96805  Isoetes nuttallii Lowell Ahart 2007-5-22 13903 Butte Along small swales, in a large bare granite opening (about an acre in size), northeast of Little Bald Rock, about 300 yards east of Bean Creek Road, about 16 miles (air) northeast of Oroville. 1009 Comment
  CAS-BOT-BC69896  Isoetes nuttallii Lowell Ahart 1981-3-24 2707 Yuba 6 mi. e. of Wheatland. 50 Comment
  CHSC78001  Isolepis cernua Lowell Ahart 2000-5-10 8334 Butte On the sides of a moist (seepy) swale, about 100 yards south of a deep wash, just east of a dirt road, Peter Ahart Ranch, about 1 3/4 miles north and 1 1/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. 36 Comment
  CHSC82291  Isolepis cernua Lowell Ahart 2002-4-24 9534 Butte Vernal pools and swales, in a field, on the east side of Lone Tree Road, about 1 1/8 miles north of Cox Lane, about 3 miles (air) southwest of Palermo, about 7 miles (air) south of Oroville. 35 Comment
  JEPS98358  Isolepis cernua Lowell Ahart 2000-5-24 8390 Butte 1 mi N and 2 3/4 mi E of Honcut (Peter Ahart Ranch, E side of North Honcut Creek) 39 Comment
  CHSC40300  Jensia rammii Lowell Ahart 1985-5-9 4938 Butte About 2 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC30020  Juncus L. Ahart 1980-6-1 2365 Butte On a seep ca. 120 m e of Kunkle Reservoir, ca. 2 mi se of Paradise. 550 Comment
  CHSC76309  Juncus acuminatus Lowell Ahart 1999-9-17 8257 Yuba Sam Shintaffer Farm, on the west side of Kimball Lane, near the intersection of Kimball Lane and Hallwood Blvd., about 3/4 mile south of Sam Shintaffer's rice dryer, about 4 1/4 miles (air) northeast of Marysville. 22 Comment
  CHSC83065  Juncus acuminatus Lowell Ahart 2002-10-9 9955 Yuba Along a small stream, below the high water line of Sly Creek Reservoir, about 1/8 mile southwest of the Day Camp, Sly Creek Reservoir. 1072 Comment
  CHSC30435  Juncus articulatus L. Ahart 1980-7-29 2508 Butte Lower Forbestown Rd ca 1/4 mi N of the intersection with Robinson Mill Rd, W of the town of Forbestown. 750 Comment
  CHSC88237  Juncus balticus Lowell Ahart; Samantha Mackey Hillaire 2004-7-9 11186 Tehama Seep on the north side of the Mill Creek Trail (4E10), north of Mill Creek, about 3/4 mile west of the Black Rock, Black Rock Campground, and Ponderosa Way (Forest Road 28N29), about 26 miles (air) east of Red Bluff. 655 Comment
  CHSC91357  Juncus balticus Lowell Ahart; John Dittes 2005-6-9 12043 Siskiyou Meadow area along a small drainage, on the west side of a poor rock fence, about 280 yards east of where cattle water in the Shasta River, about 3/5 mile (air) south of Highway 99/97 Cutoff, about 2 1/2 miles (air) east-southeast of Grenada. 774 Comment
  JEPS114889  Juncus brachyphyllus Lowell Ahart, John Dittes 2008-8-26 15350 Modoc On the bottom of Rose Creek, 750 feet southwest of confluence of Rose Creek and Pit River, on the northwest side of unnamed road,, 2660 feet east of intersection with County Road 85a, 9.3 miles (air) north-northeast of Lookout 1276 Comment
  SEINET10472238  Juncus bufonius Lowell Ahart 1983-5-4 Ahart 3959 Sutter Along edge of Pass Rd, ca. 4 mi w of Kellogg Rd, Sutter Buttes. Valley Grassland. West of Marysville. 50 Comment
  SEINET10472240  Juncus bufonius Lowell Ahart 1985-7-11 Ahart 5133 Plumas Below the high water line of Little Grass Valley Reservoir, where the South Fork of the Feather River flows into the lake, about 4 1/4 miles north-east of La Porte. Comment
  CHSC113184  Juncus bufonius var. bufonius Lowell Ahart 2013-11-30 19315 Yuba On the southeast side of Dry Creek, about 30 yards southeast of Willow Glen Creek, below the high water line of Collins Lake, about 30 yards north of Marysville Road, about 2 1/2 miles west of Oregon House. 356 Comment
  CHSC47529  Juncus bufonius var. bufonius Lowell Ahart 1980-5-4 2179 Butte Open pasture field, south-west of the intersection of Nelson Avenue and 20th. Street, Thermalito. 60 Comment
  CHSC61515  Juncus bufonius var. bufonius Lowell Ahart 1993-5-15 6939 Butte Rice field, on the north side of Biggs Princeton Road, about 2 miles west of Biggs. Comment
  CHSC90821  Juncus bufonius var. bufonius Lowell Ahart 2005-5-2 11775 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 25 Comment
  CHSC90956  Juncus bufonius var. bufonius Lowell Ahart 2005-4-14 11719 Butte Bottom of a deep drain ditch, about 200 feet east of the railroad tracks, north of Spruce Street, Gridley. 28 Comment
  CHSC91305  Juncus bufonius var. bufonius Lowell Ahart; John Dittes 2005-6-2 11957 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  JEPS118086  Juncus bufonius var. bufonius Lowell Ahart, John Dittes 2011-6-9 17447 Tehama Rio De Los Molinos Land Grant. Sand dune area, about 100 yards south of the fence, 1.6 miles (air) east of Highway 99, 2.4 miles (air) north of Vina 80 Comment
  RSA716184  Juncus bufonius var. bufonius L. Ahart 2005-7-31 12241 Nevada Between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2063 Comment
  UCD141410  Juncus bufonius var. bufonius L. Ahart 1982-5-30 3501 Sutter on the northwest part of the Myers home, Myers Ranch, Sutter Buttes. 150 Comment
  JEPS114384  Juncus bufonius var. congestus Lowell Ahart, John Dittes 2008-6-20 14958 Lassen In meadow, around a new pond, about 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CHSC47537  Juncus bufonius var. occidentalis Lowell Ahart 1979-6-3 1917 Yuba On the bottom and sides of a small man made depression in a logged over area, about 1 mile south of Challenge. 670 Comment
  JEPS104609  Juncus bufonius var. occidentalis Lowell Ahart 2003-7-18 10426 Plumas In a meadow, on the n side of the road, ca 1/4 mi w of Lumpkin Ridge Rd, ca 1 1/2 mi se of Tamarack Flat, ca 1 1/2 mi (air) nw of Little Grass Valley Reservoir dam, ca 4 1/2 mi (air) nw of La Porte. 1709 Comment
  JEPS121227  Juncus bufonius var. occidentalis Lowell Ahart, John Dittes 2013-7-24 18930 Modoc About 50 yards S of the levee road, N side of Ash Creek Floodplain, 0.54 air miles SE of Pilot Butte parking area, 1.1 air miles S of County Road 87, 6.8 air miles W of Adin, Big Valley. Comment
  CHSC111388  Juncus capitatus Lowell Ahart 2012-5-2 17976 Butte About 100 yards southeast of the entrance to Upper Bidwell Park, about 1/4 mile east of Chico. 81 Comment
  CHSC46425  Juncus capitatus Lowell Ahart 1989-5-28 6282 Butte In a mined over area south of Oregon Gulch Road, about 1/2 mile north of the Cementery, about 1 1/4 miles west of Rocky Point, about 10 miles east and 3 miles north of Oroville. 335 Comment
  CHSC105552  Juncus covillei Lowell Ahart 2010-9-15 17181 Sierra Along the west side of a poor road, about 15 yards north of the first pond, about 20 yards northwest of the cabin, about 50 yards southwest of the middle pond, at the spring, about 2 3/4 miles (air) north of Yuba Pass on Highway 49, about 4 miles (air) east of Haskell Peak. 2134 Comment
  CHSC113594  Juncus covillei Lowell Ahart 2014-8-26 19770 Plumas Center of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. 1533 Comment
  HSC100765  Juncus covillei Lowell Ahart 2010-9-15 17181 Sierra Along W side of a poor road, ~15 yd. N of the first pond and ~20 yd. NW of cabin, ~50 yd. SW of middle pond at spring, 2 3/4 (air) mi. N of Yuba Pass on Hwy. 49, 4 (air) mi. E of Haskell Peak. 2135 Comment
  SEINET10472436  Juncus covillei Lowell Ahart 1985-7-11 Ahart 5123 Plumas Below the high water line of Little Grass Valley Reservoir, where the South Fork of the Feather River flows into the lake, about 4 1/4 miles north-east of La Porte. Comment
  SEINET10971397  Juncus cyperoides Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4692 Butte About 0.5 mi SW of the jct of Black Bart Rd and Forbestown Rd, ca. 14 mi E of Oroville; Yellow Pine Forest; 650 m. 650 Comment
  UC1562371  Juncus diffusissimus Lowell Ahart 1990-5-21 6476 Butte about 4.5 mi sw Oroville (about 0.25 mi s of Feather River, about 0.4 mi w of Pacific Heights Road, w. edge of small pond) 30 Comment
  CHSC39675  Juncus effusus subsp. pacificus Lowell Ahart 1983-6-21 4099 Butte Found along the edge of Bloomer Hill Road, about 3 miles north-west of the Oroville Quincy Highway, about 16 miles north-east of Oroville. Section 30. 700 Comment
  JEPS113871  Juncus effusus subsp. pacificus Lowell Ahart, Lawrence Janeway, Linnea Hanson 2007-7-10 14280 Butte Northwest part of a large open area, about 250 yards east of Bean Creek Road, northeast of Little Bald Road, about 16 miles (air) northeast of Oroville 1024 Comment
  RSA726658  Juncus effusus subsp. pacificus L. Ahart, L. P. Janeway, Linnea Hanson 2007-7-13 14301 Butte About 30 yards east of a poor dirt road, about 1 1/2 milea (air) northeast of Clipper Mills. 1046 Comment
  SEINET10938194  Juncus effusus var. pacificus Lowell Ahart 1985-6-30 Ahart 5086 Butte About 2 1/2 miles north-east of Forbestown. Alt. 2850 ft. 868 Comment
  CHSC80888  Juncus ensifolius Lowell Ahart 2001-7-17 8902 Plumas Small meadow, on the south side of a poor logging road, part of a small branch of Butt Creek, about 2 1/2 miles (air) north of Humboldt Summit. 1828 Comment
  JEPS104263  Juncus ensifolius Lowell Ahart 2003-6-30 10336 Butte In the gutter on the n side of Fields Ridge Rd, n of the Ponderosa Reservoir, ca 3 mi (air) n of Forbestown. 491 Comment
  JEPS115911  Juncus ensifolius Lowell Ahart, John Dittes 2009-7-27 16188 Plumas On dry soil, about 20 yards north of the poor dirt road, on the north side of a small pond, headwaters of Grizzly Gulch, 2.1 miles (air) northeast of Butt Valley Reservoir Dam 1479 Comment
  JEPS120758  Juncus ensifolius Lowell Ahart 2013-8-23 19019 Plumas East of Bird Creek, about 1/2 air mile west of Monitor Flat, about 3 air miles northwest of Pilot Peak, about 9 air miles northeast of La Porte. Comment
  JEPS98398  Juncus ensifolius Lowell Ahart 2000-8-10 8646 Nevada gravel bars along Fall Creek, 1/8 mi E of Forest Hwy 18 (Bowman Lake Rd), 5 air miles (8 rd miles) N of Hwy 20 and Bear Valley 1706 Comment
  RSA0118632  Juncus ensifolius Lowell A. Ahart 2014-8-24 19735 Plumas On the west side of the dirt road, about one mile north of the bridge across the South Fork of the Feather River and the northeast part of Little Grass Valley Reservoir, about 5 miles (air) north of La Porte. 1563 Comment
  CHSC108306  Juncus hemiendytus var. hemiendytus Lowell Ahart 2011-7-23 17603 Nevada In the small meadow where there are two grave memorials, about 40 yards west of Bowman Lake Road, about 1/8 mile west of the bridge across the South Fork of the Yuba River, about 1 mile (air) north of Highway 20 at the intersection of Bowman Lake Road. 1379 Comment
  CHSC61520  Juncus hemiendytus var. hemiendytus Lowell Ahart 1993-6-20 6974 Butte Tracks of a logging Road, about 1/2v mile south of Quartz Hill. 1219 Comment
  JEPS103528  Juncus hemiendytus var. hemiendytus Lowell Ahart 2002-6-17 9722 Plumas In a meadow, on the N side of the road, ca 1/8 mile W of Lumpkin Ridge Road, ca 1 1/2 miles SE of Tamarack Flat, ca 1 1/2 miles (air) NW of Little Grass Valley Reservoir dam, ca 4 1/2 miles (air) NW of La Porte. 1651 Comment
  JEPS106086  Juncus hemiendytus var. hemiendytus Lowell Ahart, John Dittes, Josephine Guardino, Robert Schlising 2004-6-14 11053 Plumas On the north side of a small meadow, about 50 yards north of the dirt road, road goes to Lake Davis, about 1/2 mile west of Lake Davis, about 11 1/2 miles (air) northeast of Slote 1777 Comment
  JEPS128665  Juncus hemiendytus var. hemiendytus Lowell Ahart, John Dittes, Josephine Guardino 2017-6-27 21464 Nevada About 10 yards of Carpenter Meadow, about 90 yards south of the poor dirt road, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. Comment
  CHSC92198  Juncus howellii Lowell Ahart; John Dittes 2005-9-19 12422 Plumas Along the west side of a good dirt road, about 1 1/4 miles east of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake. 1989 Comment
  JEPS104259  Juncus howellii Lowell Ahart 2003-5-22 10211 Shasta On the n side of the poor dirt road, ca 250 yd ne of the barn, ca 1/8 mi south of the Coleman Canal, 2.8 mi (air) wsw of Darah Springs State Fish Hatchery, ca 12 mi (air) ene of Cottonwood. 259 Comment
  JEPS114891  Juncus kelloggii Lowell Ahart 2008-5-30 14794 Butte Dry to damp granite soil, small meadow, bottom of an old gold mined area, about 150 yeards west of the cemetery, about 150 yards north of Oregon Gulch, about 10 miles (air) northeast of Oroville 305 Comment
  HSC100752  Juncus laccatus Lowell Ahart 2011-8-19 17641 Butte Small spring on S side of road and wet meadow on N side, S side of a good forest road, 0.5 mi. N of Lost Creek Reservoir Dam, and 4.5 (air) mi. N of Clipper Mills. 1267 Comment
  JEPS115976  Juncus laccatus Lowell Ahart, John Dittes 2009-7-13 16035 Plumas On dry to damp soil, edge of a seep, on the north side of Forest Service Road 27N28, headwater of Clear Creek, about 2.0 miles (air) north of Butt Valley Reservoir Dam, about 3 miles (air) southwest of Lake Almanor Reservoir Dam 1476 Comment
  JEPS118349  Juncus laccatus Lowell Ahart 2011-8-19 17641 Butte Along the wet road gutter, on the south side of a good forest road, about 1/2 mile north of the Lost Creed Reservoir Dam, about 4 1/2 miles (air0 north of Clipper Mills 1266 Comment
  UC1438370  Juncus leiospermus Lowell Ahart 1978-4-21 1661 Butte Peter Ahart Ranch Honcut 50 Comment
  CHSC93377  Juncus leiospermus var. ahartii Lowell Ahart 2006-4-27 12539 Butte In a vernal pool, about 40 yards northeast of the tower by the south fence, pasture fields, Peter Ahart Ranch, about 1 mile north and 1 3/4 miles east of Honcut. 50 Comment
  JEPS104275  Juncus leiospermus var. leiospermus Lowell Ahart 2003-4-8 10036 Butte On the high water line of a small vernal pool, ca 20 yd south of a faint poor dirt road, pasture field, ca 150 yd sw of the iron gate and fence, w of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 344 Comment
  CHSC97271  Juncus nevadensis var. nevadensis Lowell Ahart; John Dittes 2007-8-9 14440 Plumas About 80 yards north of the road, on the north slope of Mount Ingalls, about 6 miles (air) northwest of the north end of Lake Davis. 2551 Comment
  CHSC65390  Juncus occidentalis Lowell Ahart 1995-9-13 7628 Plumas On the north side of Onion Valley, east of Quincy La Porte Road, about 1 mile northwest of Pilot Peak. 1828 Comment
  JEPS103511  Juncus occidentalis Lowell Ahart 2002-6-21 9740 Butte On the sides of a poor dirt road, Watson Ridge, ca 2 miles (air) NE of Bald Rock Dome, ca 5 miles (air) N of Feather Falls (the town). 1086 Comment
  JEPS98471  Juncus occidentalis Lowell Ahart 2000-6-29 8535 Butte 5 air miles E of Magalia (W side of Concow Road at Flea Meadow, 1/2 mi W of Flea Mountain, 3 1/2 air miles N of Concow Reservoir) 1036 Comment
  CHSC81072  Juncus orthophyllus Lowell Ahart 2001-8-8 9067 Sierra In a large mountain meadow, Haypress Valley, 100 yards south of Yuba Pass Webber Lake Road (Forest Road 12), about 1/2 mile northwest of Church Camp, about 4 miles (air) northwest of Webber Lake. 2133 Comment
  JEPS119931  Juncus orthophyllus Lowell Ahart 2012-9-5 18441 Plumas About 300 yards northeast of the County Road where it crosses the South Fork of the Feather River, about 3/4 mile (air) southwest of Pilot Peak, about 8 1/2 miles (air) northeast of La Porte. Comment
  CHSC84188  Juncus oxymeris Lowell Ahart 2003-7-14 10394 Lake Near a small stream, at Barrel Spring, about 1 1/2 miles (air) south of Bartlett Springs Road, about 2 miles (air) west of Bear Valley. 396 Comment
  CHSC41444  Juncus parryi Lowell Ahart 1986-7-8 5358 Plumas Around a small seep, near an open bare serpentine area, about 1 mile northwest of Pilot Peak, about 14 miles northeast of La Porte. 1950 Comment
  CHSC88429  Juncus parryi Lowell Ahart 2004-8-17 11387 Nevada South of a large snow lake, along Jackson Creek, about 400 yards east of Jackson Lake, at the north base of English Mountain. 2071 Comment
  CHSC100047  Juncus saximontanus Lowell Ahart 2008-8-13 15160 Plumas West edge of La Porte Road, west of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte. 1613 Comment
  JEPS114806  Juncus saximontanus Lowell Ahart 2008-8-13 15160 Plumas West edge of La Porte Road, west of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1613 Comment
  CHSC61353  Juncus tenuis Lowell Ahart 1993-7-23 7099 Butte On the west side of Fall River, about 100 yards west of the bridge across Fall River, about 6 (air) miles northeast of Feather Falls. 1036 Comment
  CHSC69729  Juncus tenuis Lowell Ahart 1997-10-20 7927 Butte On sand bars, on the west side of the sharp bend in the South Fork of the Feather River, about 1/4 mile north of the bridge across the river, about 3/4 mile north of Golden Trout Crossing, 3 miles (air) northwest of Sly Creek Reservoir Dam. 914 Comment
  RSA754871  Juncus tenuis L. Ahart, John Dittes 2009-9-7 16390 C Plumas Below the high water line of Lake Almanor, about 2000 feet NW of lake Almanor Dam. 1591 Comment
  SBBG121534  Juncus tenuis L. Ahart 2007-6-12 14081 Butte E side of Rockefeller Rd, at the intersection of Bald Rock Rd and Rockefeller Rd, ca. 13 mi NE of Oroville 1011 Comment
  SEINET13709239  Juncus tenuis Lowell William Ahart, Lowell William Ahart 2001-1 8985 Nevada NE of Lake Van Norden, 0.5 Mi. E of Soda Springs (T17N, R14E, sec 25, NW 1/4) 6770 Ft. 2063 Comment
  CHSC78344  Juncus triformis Lowell Ahart 2000-6-27 8529 Butte On the north side of Bean Creek Road, about 1/4 mile southeast of Little Bald Rock, about 1 1/4 mile northeast of Big Bald Rock, about 4 miles (air) northeast of Madrone Lake, about 13 miles (air) northeast of Oroville. 1066 Comment
  JEPS118353  Juncus triformis Lowell Ahart 2011-7-9 17571 Butte Southeast edge of a large open bare granite area, about 3/8 mile northeast of Little Bald Rock, about 2 miles (air) southeast of Brush Creek, about 15 miles (air) northeast of Oroville 974 Comment
  CHSC47575  Juncus uncialis Lowell Ahart 1982-5-1 3401 Butte Around the edges of a large vernal pool in one of the farmed fields, Peter Ahart Ranch, about 2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC80892  Juncus usitatus Lowell Ahart 2001-7-6 8881 Butte West of a large pond, large overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ord Bend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS113762  Juncus usitatus Lowell Ahart 2007-7-31 14400 B Butte On the south strand of Thermalito Afterbay, about 150 yards north of Highway 162, about 5 1/4 miles west of the intersection of Highway 162 and Highway 70, about 5 3/4 miles (air) west of Oroville 34 Comment
  RSA726656  Juncus usitatus L. Ahart 2007-7-5 14249 Butte 25 yards west of French Avenue, on the north side of Evans Reimer Road, about 2 miles (air southwest of Gridley. 25 Comment
  CDA39250  Juncus xiphioides L. Ahart 2004-6-18 11070 Glenn On the west side of Grindstone Creek, about 100 yards north of Stony Creek, about 50 yards east of Road 306 (Elk Creek Newville Road), west of the Grindstone Rancheria Indian Reservation. Comment
  SEINET10531628  Juniperus californica Lowell Ahart 1983-4-10 Ahart 3922 Butte S of a large wash, 1/10 mi e of the large barn, ca. 1.4 mi ne of Hwy 99 and Pentz Rd jct, ca. 16 mi s of Chico. Valley Grassland; 65 m. 65 Comment
  JEPS126564  Juniperus occidentalis Lowell Ahart, John Dittes 2016-6-7 20974 Lassen About 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC37207  Keckiella breviflora var. breviflora L. Ahart 1982-7-28 3684 Sierra Ca. 1.3 mi of a stem. Ca. 1/4 mi n of Pacific Mine, ca. 5 mi e of LaPorte. 1700 Comment
  NY790166  Keckiella breviflora var. glabrisepala L. Ahart 1980-6-19 2386 Butte Along the edge of Swedes Flat Road, ca. 2.5 miles east of the Bangor-Oroville Highway, near Bangor. 320 Comment
  RSA715671  Koeleria macrantha L. Ahart, John Dittes 2005-6-1 11860 Lassen on the east side of the poor dirt road, about 1/2 mile west of Scott Road, long Valley, about 2 miles (air) northwest of the intersection on Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  CHSC90806  Koeleria phleoides Lowell Ahart 2005-5-2 11769 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 25 Comment
  UC1594708  Koeleria phleoides Lowell Ahart 1992-5-9 6754 Butte about 1 1/2 mi w Oroville Dam (on the n side of the Thermalito Diversion Pool, Lake Oroville Recreation Area); Lake Oroville Recreation Area, Thermalito Diversion Pool 76 Comment
  CHSC33693  Kumlienia hystricula L. Ahart 1981-4-29 2717 Butte Along edges of a small stream near Ponderosa Dam, near Forbestown. 500 Comment
  CAS-BOT-BC340349  Kyhosia bolanderi Lowell Ahart 1979-8-16 s.n. Plumas Along Ohio Ravine 1700 Comment
  CHSC43253  Kyhosia bolanderi Lowell Ahart 1987-10-16 5915 Plumas Meadow, near the dirt road, near Buckhorn Creek, about 4 miles south-west of Bucks Lake. 1676 Comment
  CHSC40557  Lactuca serriola Lowell Ahart 1985-10-19 5217 Sutter About 300 feet north of Little North Butte, about 1/2 mile north of the Dean Cabin, Dean Ranch, Sutter Buttes. 320 Comment
  CHSC110410  Lagerstroemia indica Lowell Ahart 2012-10-28 18538 Butte on the west side of the horse path (gravel road), about 100 yards north of the paved park road, west side of the old walnut orchard, south of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  CAS-BOT-BC341293  Lagophylla glandulosa Lowell Ahart 1977-9-20 s.n. Butte Peter Ahart Ranch, Honcut 50 Comment
  JEPS110184  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  CAS-BOT-BC341725  Lagophylla ramosissima Lowell Ahart 1983-9-4 4406 Sutter About 1 1/2 miles south-east of the Dean Cabin, Sutter Buttes 270 Comment
  CDA43007  Lamium amplexicaule L. Ahart, John Dittes 2008-6-2 14962 Lassen In meadow, about 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
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Oct 5 2019
  CHSC90996  Lasthenia fremontii Lowell Ahart 2005-5-11 11806 Butte Margins of a small vernal pool, south of a small stream, open pasture field, about 1 mile south of Beatson Hollow, about 1 1/2 miles southwest of the poor dirt road off of Cherokee Road, south part of North Table Mountain, about 7 miles (air) north of Oroville. 280 Comment
  RSA325173  Lasthenia fremontii L. Ahart 1984-4-19 4553 Sutter Along West Butte Road, ca. 1.8 mile N of Sacramento Outing Club, Sutter Buttes, west of Marysville. 35 Comment
  UCD133699  Lasthenia fremontii L. Ahart 1978-5-1 1693 Butte Ahart Ranch, Honcut. 50 Comment
  CHSC99283  Lasthenia glaberrima Lowell Ahart; John Dittes 2008-6-22 15041 Lassen About 20 yards west of the road levee, along a small natural drainage, open meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  UCSC004636  Lasthenia gracilis Lowell Ahart 2005-5-11 11791 Butte T20N, R4E, northwest 1/4 Section 20, south part of North Table Mountain, about 200 yards northwest of the poor dirt road off Cherokee Road, about 200 yeards south of the rim into Beatson Hollow, about 7 miles (air) north of Oroville Comment
  CHSC29994  Lathyrus angulatus L. Ahart 1980-4-28 2111 Butte Peter Ahart Ranch, Honcut. 50 Comment
  RSA726487  Lathyrus angulatus L. Ahart 2007-5-8 13737 Tehama About 3.7 miles west of the intersection Highway 36 and 99 or I-5, about 4 miles (air) northwest of Red Bluff. 111 Comment
  CHSC41448  Lathyrus jepsonii var. californicus Lowell Ahart 1986-5-24 5305 Sutter Near the west fence line, about 1 mile west of the Dean Cabin, Dean Ranch, about 4 1/2 miles north-west of Sutter, Sutter Buttes. 274 Comment
  CHSC87633  Lathyrus lanszwertii var. aridus Lowell Ahart; Josephine Guardino 2004-5-24 10943 Plumas About 300 yards south of a good dirt forest road, about 1/2 mile west of Squirrel Creek, about 1/10 mile north of the railroad, Greenhorn Creek, and Highway 70, about 7 miles (air) southeast of Quincy. 1204 Comment
  CHSC105217  Lathyrus latifolius Lowell Ahart; John Dittes 2010-7-19 16894 Tehama About 10 yards north of the poor road crossing, on the bottom of the South Fork of Battle Creek, about 3.3 miles (air) southwest of Manton, about 4.2 miles (air) north of Highway 36 and Lane Valley Road intersection. 432 Comment
  CHSC116216  Lathyrus latifolius Lowell Ahart 2015-6-16 20247 Yuba Near the water ditch, about 100 yards south of the poor dirt road, about 3/4 mile southeast of the intersection of Weiss Road and Forbestown Road, about 2 miles (air) southwest of Forbestown. 829 Comment
  SEINET956196  Lathyrus sulphureus Lowell Ahart 1987-1 5621 Butte South of the Forbestown Ditch, about 2.5 miles north-east of Forbestown. 869 Comment
  CHSC10618  Layia fremontii Lowell Ahart 1970-4-20 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC42915  Leersia oryzoides Lowell Ahart 1987-7-3 5777 Butte Along the North Fork of the Feather River, neaar the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC103014  Lemna minuta Lowell Ahart 2009-10-8 16410 Butte On the south side of the road, about 50 yards east of Parking Lot 15, Gray Lodge Waterfowl Management Area, about 7 miles (air) southwest of Gridley. 19 Comment
  JEPS106225  Lemna trisulca Lowell Ahart, John Dittes, Josephine Guardino, Robert Schlising 2004-6-14 11067 Plumas In a very small stream, in a large meadow, on the south side of the dirt road (Forest 24N10), about 1/4 mile west of Cow Creek, west of Lake Davis, about 9 1/4 miles northeast of Slote 1796 Comment
  CHSC116271  Leontodon saxatilis subsp. longirostris Lowell Ahart 2015-11-19 20669 Yuba 100 yards or more north of spillway area, below high water line, west of Lake Francis, about 1 1/2 miles south of Dobbins. 512 Comment
  CHSC71162  Leontodon saxatilis subsp. longirostris Lowell Ahart 1998-6-3 7965 Butte About 1/4 mile north of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  JEPS113110  Leontodon saxatilis subsp. longirostris Lowell Ahart, Brian Williams 2007-4-13 13633 Placer Open pasture fields, about 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln 43 Comment
  JEPS117216  Leontodon saxatilis subsp. longirostris Lowell Ahart 2010-5-16 16700 Butte East of basalt cliffs, about 1/2 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville 364 Comment
  JEPS119878  Leontodon saxatilis subsp. longirostris Lowell Ahart 2012-6-2 18131 Butte Along the sides of Truex Road, west of the intersection of Truex Road and Trevor Road, about 1/8 mile northwest of the West Branch Bridge across Lake Oroville. Comment
  JEPS122126  Leontodon saxatilis subsp. longirostris Lowell Ahart, John Dittes 2014-5-16 19471 Tehama About 200 yards southwest of the lone oak tree, about 1/2 mile east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. Comment
  CHSC101831  Lepechinia calycina Lowell Ahart 2009-5-23 15759 Butte About 10 miles northeast of Chico, Upper Bidwell Park, about 1/4 mile west of the intersection of Highway 32 and Ten Mile House Road. On the east side of Guardians Trail by shrubs, about 150 yards southwest of Ten Mile House Road. 407 Comment
  CHSC117171  Lepidium campestre Lowell Ahart; John Dittes 2016-6-22 21035 Tehama About 30 yards south of the fish ladder on Deer Creek, about 0.9 mile (air) northeast of USFS Road 27N08 Bridge over Deer Creek, about 2 miles by trail to Highway 32. 911 Comment
  CHSC32054  Lepidium campestre L. Ahart 1973-5-25 240 Sierra Near Alleghany. 914 Comment
  JEPS110047  Lepidium campestre Lowell Ahart 2006-6-21 12842 Sierra On the west side of the road, about 3 1/2 miles (by road) northwest of Forest 1421 Comment
  JEPS114344  Lepidium nitidum var. nitidum Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14612 Merced On dry soil, on grassy slopes, about 40 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CAS-BOT-BC12976  Lepidium strictum Lowell Ahart 1983-5-4 3941 Sutter Along Pass Road, Sutter Buttes. About 4 miles west of Kellogg Road. 50 Comment
  CAS-BOT-BC12977  Lepidium strictum Lowell Ahart 1984-4-19 4556 Sutter North of the Sacramento Outing Club. Along the edge of West Butte Road, about 1/8 mile north of the club. Sutter Buttes. 35 Comment
  CHSC101269  Lepidium strictum Lowell Ahart 2009-4-3 15525 Butte On margins of the gravel road, east of the Cedar Grove parking area in Lower Bidwell Park, Chico. 67 Comment
  CHSC39595  Lepidium strictum Lowell Ahart 1983-4-10 3929 Butte Along the edges of dirt roads, about 1 1/2 miles north-east of Highway 99 and Pentz Road. 100 Comment
  CHSC99155  Lepidium strictum Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14703 Merced On dry soil, about 10 feet east of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CAS-BOT-BC13064  Lepidium virginicum var. menziesii Lowell Ahart 1987-5-6 5511 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles southeast of Jarbo Gap. 271 Comment
  GH404852  Lepidium virginicum var. pubescens L. Ahart 2001-10-16 9389 Unknown along the south side of Dixie Creek Road, about 1/4 mile west of Highway 89, about 2 1/2 miles southwest of Crescent Mills. T26N, R9E, southeast 1/4 Section 26 1066 Comment
  SEINET13711322  Lepidium virginicum var. pubescens Lowell William Ahart, Lowell William Ahart 2001-1 8964 Nevada NE of Lake Van Norden, 1.5 Mi. E of Soda Springs (T17N, R14E, Drc 25, NW 1/4) 6770 Ft. 2063 Comment
  CHSC31826  Leptosiphon bicolor L. Ahart 1974-4-11 367 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC44324  Leptosiphon ciliatus Lowell Ahart 1974-7-30 562 Plumas About 1/2 mile north of the Bunker Hill Mine, about 12 miles north-east of La Porte. 1828 Comment
  CHSC45456  Leptosiphon harknessii Lowell Ahart 1980-8-12 2568 Yuba On a gravel bar, a little below where Gold Run Creek flows into Slate Creek, above Onion Creek, about 7 miles south of La Porte. 1158 Comment
  CHSC115346  Leptosiphon parviflorus Lowell Ahart 2015-4-13 20041 Butte About 9 1/2 miles (air) north of Oroville. 307 Comment
  CHSC94731  Leptosiphon parviflorus Lowell Ahart 2006-6-15 12733 Glenn On the west side of the creek, about 30 yards south of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford. 595 Comment
  JEPS120029  Lessingia nana Lowell Ahart 2012-8-22 18419 Butte On the south side of the paved road to the shooting range in the clay pit, about 1/4 mile east of Larkin Road, about a mile south of the Oroville Airport. Comment
  CHSC113164  Lessingia nemaclada Lowell Ahart 2013-11-13 19253 Butte Between the road and the large cutbank, about 50 yards southeast of the Ponderosa Dam spillway. 299 Comment
  UCR263565  Lessingia nemaclada Lowell Ahart 2002-10-10 9979 Yuba Sierra Nevada Mtns., E of the upper part of Englebright Reservoir on the Yuba River, along Rice's Crossing Road, c. 2 miles (air) N of Bridgeport, c. 18 miles N of Highway 20 166 Comment
  CHSC42945  Leucothoe davisiae Lowell Ahart 1987-7-8 5817 Butte Along a side road near Walker Plains Road, about 1 1/2 miles north-east of Coyote Gap, about 6 miles north-east of Pulga. 1341 Comment
  JEPS103594  Leucothoe davisiae Lowell Ahart 2002-7-6 9842 Plumas On the S side of the dirt road and S of the large meadow, on Rock Island Ridge, ca 3/4 mile SE of Soapstone Hill and the Oroville Quincy Highway, ca 1 1/2 miles (air) NE of Four Trees. 1611 Comment
  JEPS117524  Ligustrum japonicum Lowell Ahart 2010-9-24 17239 Butte Near the north edge of the Golf Course, about 200 yards northeast of the footbridge, about 250 yards northeast of the Golf Club House, about 50 yards south of Big Chico Creek, Bidwell Park 99 Comment
  JEPS117613  Lilaea scilloides Lowell Ahart 2010-6-9 16789 Butte About 100 yards west of the fence, about 1/2 mile south of the improved parking area and Cherokee Road, North Table Mountain, about 5 1/2 iles (air) northeast of Oroville 398 Comment
  RSA0108928  Lilaea scilloides Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14654 Merced About 20 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  RSA767487  Lilaea scilloides Lowell Ahart 2010-6-9 16789 Butte Bottom of small drainage, open grassy pasture field, about 100 yards west of the fence, about 1/2 mile south of the improved parking area and Cherokee Road, North Table Mountain, about 5.5 air miles northeast of Oroville. 399 Comment
  CHSC43361  Lilium pardalinum subsp. pardalinum Lowell Ahart 1977-7-31 1508 Sierra 1/10 mile east of Port Wine Ridge Road, about 2 miles north of Scales. 1310 Comment
  CHSC83909  Limnanthes douglasii subsp. nivea Lowell Ahart 2003-4-10 10083 Butte Along a drainage, southwest of the 'sunken area,' on the top of South Table Mountain, about 2 1/2 miles (air) north of Oroville. 310 Comment
  JEPS120764  Limnophila X ludoviciana Lowell Ahart 2013-9-20 19062 Butte About 20 yards north of Hamilton Road, about 1/8 mile east of Riceton Highway, about 1 mile southeast of the Rice Experiment Station. Comment
  JEPS102803  Limosella acaulis Lowell Ahart 2001-8-29 9227 Plumas On the bottom of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 Comment
  JEPS120655  Limosella acaulis Lowell Ahart 2013-10-26 19218 Butte On the south side of Philbrook Creek, below the high water line (strand) of Philbrook Reservoir. Comment
  CHSC82232  Limosella aquatica Lowell Ahart 2002-4-14 9483 Butte Area between the Railroad and the Midway Road, 50 yards south of Nelson Dlavo Road, in Nelson. 36 Comment
  JEPS121274  Limosella aquatica Lowell Ahart, John Dittes 2013-7-23 18889 Lassen Man-made pond, about 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS98369  Linanthus filipes Lowell Ahart 2000-6-27 8526 Butte 12 air miles NE of Oroville (N part of Big Bald Rock, 100 yds S and W of the N and E forest line, 3 air miles E of Madrone Lake) 963 Comment
  JEPS102736  Linanthus harknessii Lowell Ahart 2001-7-17 8918 Plumas Meadows, on the west side of a poor logging road, east of a small branch of Butt Creek, about 2 1/2 miles (air) north of Humboldt Summit. 1828 Comment
  CHSC42119  Lindernia dubia Lowell Ahart 1986-11-9 5443 Butte About 1/10 mile south of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miles south-west of Oroville. 36 Comment
  CHSC102675  Lindernia dubia var. anagallidea Lowell Ahart; John Dittes 2009-9-7 16403 Plumas On damp bare soil, below the high water line of Lake Almanor, about 2000 feet northwest of Lake Almanor Dam. 1591 Comment
  CHSC69433  Lindernia dubia var. anagallidea Lowell Ahart 1997-8-13 7860 Yuba On the south side of Scott Forbes Road, 1/4 mile east of the intersection of Scott Forbes Road and Peoria Road, just east of Gray Drive, about 2 1/4 miles (air) east of Browns Valley. 91 Comment
  CHSC83045  Lindernia dubia var. anagallidea Lowell Ahart 2002-10-9 9971 Yuba On the south bank of Lost Creek, below the high water line of Sly Creek Reservoir, about 200 yards southwest of the Day Camp, Sly Creek Reservoir. 1072 Comment
  UC1562296  Lindernia dubia var. anagallidea Lowell Ahart 1990-7-15 6559 Butte about 0.25 mi nw Enterprise Bridge across Lake Oroville (e of Enterprise Boat Launch Area, below the high water line of Lake Oroville); Lake Oroville 243 Comment
  JEPS127061  Linum bienne Lowell Ahart 2016-5-14 20825 Butte On the east side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. Comment
  JEPS117582  Linum lewisii var. lewisii Lowell Ahart, John Dittes 2010-7-31 16981 Lassen Dry meadow 10 yards northeast of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  CHSC68910  Listera convallarioides Lowell Ahart 1997-7-11 7745 Butte Southeast of Cold Creek, about 2 miles (air) southwest of Bald Mountain, about 9 miles by road from Stirling City, or about 2 miles (air) northeast of Stirling City. 1219 Comment
  CHSC47417  Lithocarpus densiflorus var. echinoides Lowell Ahart 1976-7-16 1177 Plumas About 5 miles north-west of Little Grass Valley Reservoir. 1828 Comment
  CHSC94130  Lithophragma tenellum Lowell Ahart 2006-6-28 12865 Sierra About 3/4 mile (air) east of Lake Delahunty, about 2 miles (air) northeast of Gibsonville. 1784 Comment
  RSA0037174  Lithospermum arvense Lowell A. Ahart, John Dittes 2012-7-11 18351 Lassen North edge of a farmed field, on the south side of the highway, about 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittville, 3955 feet east of Lassen-Shasta County Line, Fall River Valley. 1205 Comment
  CHSC108188  Logfia gallica Lowell Ahart 2011-6-7 17375 Yuba Grassy road margin, about 50 yards south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. 66 Comment
  CHSC31593  Logfia gallica L. Ahart 1974-4-24 435 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC37309  Logfia gallica L. Ahart 1982-5-30 3460 Sutter Field, ca. 1/8 mi w of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  JEPS105902  Logfia gallica Lowell Ahart, John Dittes, Josephine Guardino 2004-4-15 10746 Tehama Along the Nomalaki Trail, the second switchback north of Bowers Creek, about 3/4 mile northwest of Forest Road 23N69 (Mud Flat Road), about 6 1/2 miles (air) southwest of Paskenta 522 Comment
  CAS-BOT-BC283565  Lolium multiflorum Lowell Ahart 1982-5-30 3484 Sutter Ca 0.25 mile W of the Myers home, Myers Ranch 50 Comment
  CHSC94679  Lolium multiflorum Lowell Ahart 2006-9-28 13382 Butte On the east side of the North Fork of the Feather River, on the west side of Hightway 70, about 50 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel. 445 Comment
  CHSC96530  Lolium multiflorum Lowell Ahart 2007-5-8 13755 Tehama Along flood plain of Dibble Creek, about 100 yards north of Highway 36, about 3.7 miles west of the intersection of Highway 36 and 99 or I-5, about 4 miles (air) northwest of Red Bluff. 111 Comment
  SEINET10828656  Lolium temulentum Lowell Ahart 1982-5-30 Ahart 3474 Sutter Ca.1/4 mi W of Myers home, Myers ranch, Sutter Buttes. Common only along the wash. Foothill Woodland. 50 Comment
  CHSC109005  Lomatium macrocarpum Lowell Ahart 2012-4-20 17897 Butte Cliffs, below the rim, on the west side of South Rim Trail, animal trail north of Bloody Pin Trail, about 5/8 mile west of Highway 32, about 7 3/8 miles northeast of Chico, south part of Upper Bidwell Park. 256 Comment
  CHSC93705  Lomatium nevadense var. nevadense Lowell Ahart; John Dittes 2005-6-1 11847 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  CHSC101147  Lomatium utriculatum Lowell Ahart 2009-5-15 15675 Butte About 20 yards east of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west Highway 32, about 10 miles northeast of Chico. 235 Comment
  CHSC101660  Lomatium utriculatum Lowell Ahart 2009-4-26 15646 Butte About 10 miles northeast of Chico, Upper Bidwell Park about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, on the east side of Guardians Trail, about 200 yards southwest of Pine Trail. 381 Comment
  CHSC61785  Lonicera conjugialis Lowell Ahart 1993-9-10 7215 Sierra On the west side of Mount Fillmore, about 11/2 miles south of the dirt road from Gibsonville to Johnsville. 2286 Comment
  SEINET13709441  Lonicera conjugialis Lowell William Ahart, Lowell William Ahart 2001-1 9003 Nevada Lake Van Norden, 1.25 Mi. E of Soda Springs (T17N, R14E, sec 25, NW 1/4) 6770 Ft. 2063 Comment
  CHSC43341  Lonicera involucrata var. involucrata Lowell Ahart 1975-7-2 836 Plumas Along Lost Creek, about 6 miles north of the Sly Creek Dam. 914 Comment
  UC1609033  Lonicera involucrata var. involucrata Lowell Ahart 1993-7-22 7086 Butte 6 (air) mi ne Feather Falls (about 200 yards w of the bridge, w side of river); Fall River 1036 Comment
  CHSC65167  Lotus corniculatus Lowell Ahart 1995-8-19 7612 Butte East side of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 2 3/4 miles east of Honcut, about 12 miles south-east of Oroville. 36 Comment
  JEPS110067  Lotus denticulatus Lowell Ahart 2006-6-11 12712 Glenn About 100 yards north of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford 595 Comment
  RSA443120  Lotus incanus L. Ahart, P. Ahart 1985-7-1 5095 Plumas About 1/2 mile east of Cement Creek, about 1/2 mile north of Onion Valley Creek, about 4 miles northwest of Pilot Park. 1829 Comment
  CDA31940  Lotus micranthus L. Ahart 2008-5-12 14733 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 40 yards east of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam. Comment
  JEPS117542  Lotus micranthus Lowell Ahart 2010-6-9 16778 Butte Along the sides and in the center of the poor dirt road, about 100 yards east of the fence, about 150 yards east of where you park, east of Cherokee Road, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville 384 Comment
  CDA31938  Lotus nevadensis var. nevadensis L. Ahart 2008-5-12 14729 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 40 yards east of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam. Comment
  CDA32018  Lotus purshianus var. purshianus L. Ahart, J. Dittes, J. Guardino 2009-7-29 16235 Plumas Below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam. Comment
  JEPS117168  Lotus purshianus var. purshianus Lowell Ahart, John Dittes 2010-8-30 17068 Modoc About 5 yards east of fence, south edge of the meadow, Ash Creek State Wildlife Area, 2300 feet north of Lassen County line, 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley 1267 Comment
  SEINET10452017  Lotus stipularis Lowell Ahart, Peter Ahart 1984-5-28 Ahart 4646 Butte About 1 mi NE of the West Branch Bridge, ca. 2 mi S of Old Yankee Hill, ca. 16 mi NE of Oroville; Foothill Woodland; 450 m. 450 Comment
  RSA725014  Lotus unifoliolatus L. Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  HSC95526  Lotus unifoliolatus var. unifoliolatus L. Ahart, John Dittes 2003-9-17 10579 Tehama S side of Deer Creek about 400 yds. E of Hwy. 99, about 5 air mi. SE of Los Molinos 61 Comment
  CHSC94660  Ludwigia palustris Lowell Ahart 2006-10-8 13415 Plumas On the east bank of Chips Creek, southeast of the bridge on Highway 70, on the north side of the North Fork of the Feather river, about 1 1/4 miles southwest of Belden. 715 Comment
  CHSC96897  Ludwigia palustris Lowell Ahart 2007-7-8 14275 Butte On the north side of North Honcut Creek, Peter Ahart Ranch, about 3/4 miles north and 2 1/2 miles east of Honcut, about 12 miles (air) southeast of Oroville. 45 Comment
  CHSC96912  Ludwigia palustris Lowell Ahart 2006-7-27 14391 Butte On the south strand of the Thermalito Afterbay, about 200 yards north of Highway 162, about 5 miles west of the intersection of Highway 162 and Highway 70, about 5 1/2 miles (air) west of Oroville. 36 Comment
  JEPS103444  Ludwigia palustris Lowell Ahart 2002-10-9 9969 Yuba On the S bank of Lost Creek, below the high water line of Sly Creek Reservoir, ca 200 yards SW of the Day Camp, Sly Creek Reservoir. 1072 Comment
  RSA516784  Ludwigia palustris var. pacifica L. Ahart 1980-9-8 2593 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CHSC75970  Ludwigia peploides subsp. montevidensis Lowell Ahart; Vernon H. Oswald 1999-8-13 8172 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CAS-BOT-BC198373  Lupinus albifrons Lowell Ahart 1986-5-26 5314 Sutter Along the banks of a small stream, about 1/8 mile south of the Myers Ranch, about 1 and 1/8 mile south of the Myers home, about 3 miles south-west of Pennington, Sutter Buttes 45 Comment
  JEPS107955  Lupinus benthamii var. opimus Lowell Ahart 2005-3-11 11611 Yuba South steep slope of a large rock outcrop, west of a poor dirt road, about 1/2 mile west of Marysville Road, about 1/2 mile north of Parking Area 3, Daugherty Hill Wildlife Area, Donovan Hill Management Area, about 1/2 mile north of Loma Rica Road, about 395 Comment
  JEPS119696  Lupinus bicolor Lowell Ahart 2012-5-2 17952 Butte West of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. Comment
  CDA27426  Lupinus concinnus L. Ahart, Vernon Oswald 2001-5-7 10009 Tehama Forest Road 26N15 4.9 miles west of Highway 32, between Soda Springs and Cohasset Ridge. Comment
  CHSC81024  Lupinus lepidus var. sellulus Lowell Ahart 2001-8-10 9077 Sierra Strand of Sampede Reservoir, about 1 mile southwest of Henness Pass Road, about 1 1/4 miles northwest of the Stampede Reservoir Dam. 1810 Comment
  CHSC94752  Lupinus microcarpus var. densiflorus Lowell Ahart 2006-6-11 12710 Glenn About 100 yards north of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles west-northwest of Stonyford. 595 Comment
  JEPS115619  Lupinus microcarpus var. densiflorus Lowell Ahart 2009-5-15 15703 Butte About 20 yards east of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 234 Comment
  CHSC83987  Lupinus pachylobus Lowell Ahart 2003-4-8 10043 Butte About 40 yards and in the small canyon west of the tall Digger Pine on the south side of Beatson Hollow, about 3/4 mile northwest of the iron gate and fence, northwest of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 314 Comment
  JEPS104131  Lupinus pachylobus Lowell Ahart 2003-4-8 10043 Butte About 40 yd and in the small canyon w of the tall Digger Pine on the south side of Beatson Hollow, ca 3/4 mi nw of the iron gate and fence, nw of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 314 Comment
  CHSC40597  Lupinus polycarpus Lowell Ahart 1985-4-1 4873 Butte Along Table Mountain Boulevard, near the Cambell Overflow, a little south of the intersection of Highway 70 and 149, about 7 miles north of Oroville. 100 Comment
  CHSC83885  Lupinus polycarpus Lowell Ahart 2003-4-8 10038 Butte Pasture field, about 400 yards north of the falls on Coon Hollow, about 1/2 mile west of the iron gate and fence, west of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 331 Comment
  RSA774142  Lupinus polyphyllus var. burkei L. Ahart 2010-9-21 17205 Butte About 70 yards east of the poor dirt road, about 80 yards west of Big Kimshew Creek, about 1.5 air miles NE of Jones Meadow, about 2.5 air miles SE of Philbrook Reservoir. 1918 Comment
  CHSC99017  Lupinus stiversii Lowell Ahart 2008-5-21 14782 Butte Dry bare granite soil, below the high water line of Lake Oroville, on the north side of the South Fork of the Feather River, where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile northwest of the Ponderosa Dam. 246 Comment
  CHSC90808  Lupinus succulentus Lowell Ahart 2005-5-2 11757 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 25 Comment
  JEPS114814  Luzula cascadensis Lowell Ahart 2008-8-13 15183 Plumas East of La Porte Road, along the sides of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1613 Comment
  CHSC113511  Luzula comosa var. comosa Lowell Ahart 2014-7-7 19598 Butte On the south side of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1664 Comment
  JEPS127228  Luzula comosa var. laxa Lowell Ahart, John Dittes 2016-4-29 20803 Tehama About 0.9 miles (air) northwest of USFS Road 27N08 Bridge over Deer Creek, about 2 miles by trail to Highway 32. Comment
  CHSC109082  Luzula macrantha Lowell Ahart 2012-4-9 17823 Butte Along South Rim Trail, about 30 yards east of Big Chico Creek, south part of Upper Bidwell Park, about 1/2 mile east of the power lines, about 1 1/2 miles (air) northeast of Chico. 96 Comment
  CAS-BOT-BC441203  Luzula macrantha Lowell Ahart 1975-3-23 s.n. Butte Peter Ahart Ranch, Honcut Comment
  CHSC107570  Luzula parviflora Lowell Ahart 2011-8-19 17642 Butte Along the wet road gutter, on the south side of a good forest road, about 1/2 mile north of the Lost Creed Reservoir Dam, about 4 1/2 miles (air0 north of Clipper Mills. 1266 Comment
  JEPS115184  Lychnis coronaria Lowell Ahart 2009-6-19 15935 Butte Along trail, onn the east side of Big Chico Creek, about 50 yards west ofTen Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 203 Comment
  CHSC51222  Lycopus americanus Lowell Ahart 1984-8-19 4783 Butte North of the state borrow area, west of Pacific Heights Road, about 5 miles south-west of Oroville. 30 Comment
  JEPS94688  Lycopus americanus Lowell Ahart 1998-7-18 8042 Butte about 7 air mi n of Oroville (sw of the ione oak tree, w of the cow chute on the w side of Cherokee Road); North Table Mountain, Cherokee Road 403 Comment
  SEINET10498036  Lycopus americanus Lowell Ahart 1991-9-14 Ahart 6717 Butte On the edges of a ditch, between the two large reservoirs, Joie Osgood Ranch, about 2 miles east of Honcut. Valley Grassland. T17N R4E S/C/S14. 46 Comment
  CDA5131  Lythrum hyssopifolia L. Ahart 2004-6-18 11097 Glenn North side of Salt Creek, south of the bridge across Salt Creek, on the south side of Newville Road, about 1/4 mile west of Newville, about 5 miles (air) west of Black Butte Reservoir. Comment
  CHSC102421  Lythrum hyssopifolia Lowell Ahart 2009-7-9 16011 Butte On damp soil, on the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of highway 32, about 10 miles northeast of Chico. 236 Comment
  CHSC103006  Lythrum hyssopifolia Lowell Ahart 2009-10-12 16442 Napa Below the high water line of Lake Berryessa, along Capell Creek northeast of Rest Area, 3/4 mile northeast of Highway 128 on Berryessa Knoxville Road, 3/4 mile soutwest of Capell Cove Launch Ramp on Berryessa Knoxville Road, about 19 miles (air) west of Winters. 133 Comment
  CHSC113060  Lythrum hyssopifolia Lowell Ahart; John Dittes 2013-7-23 18896 Lassen Along the south margin of the levee road, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  SEINET13711409  Lythrum hyssopifolia Lowell William Ahart, Lowell William Ahart 1999-1 8169 Butte 12 Air Mi SW of Chico, 2 Mi SE of Ordbend, Sacramento River Comment
  CHSC112974  Lythrum tribracteatum Lowell Ahart; John Dittes 2013-7-23 18902 Lassen Dry drainage, about 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC54342  Lythrum tribracteatum Lowell Ahart 1991-6-5 6659 Butte On the north side of Rutherford Road, Gray Lodge Waterfowl Management Area, about 1/4 mile west of Pennington Road, about 10 miles south-west of Gridley. 19 Comment
  CHSC84956  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS95946  Lythrum tribracteatum Lowell Ahart 1999-5-21 8073 Butte on the east side of Evans Reimer Road; about 7/8 mile east of Pennington Road; about 5 miles (air) southwest of Gridley 21 Comment
  SEINET10452850  Lythrum tribracteatum Lowell Ahart 1991-5-20 Ahart 6655 Butte On the north side of Rutherford Road, Gray Lodge Waterfowl Management Area, about 1/4 mile west of Pennington Road, about 10 miles southwest of Gridley. Freshwater Marsh. T17N R1E S13. 20 Comment
  JEPS94645  Madia elegans Lowell Ahart 1997-8-13 7844 Nevada along sides of Penn Valley Rd. just e intersection <with> Indian Springs Road (just s of Hwy 20, about 1.5 mi w of Penn Valley) 426 Comment
  CHSC46955  Madia exigua Lowell Ahart 1984-6-8 4666 Butte At the base of a cutbank, west of the little building at the south side of the Ponderosa Dam, about 2 miles north-west of Forbestown. 335 Comment
  CHSC96962  Madia exigua Lowell Ahart 2007-6-12 14071 Butte Along swales, in a large bare granite opening (about an acre in size), northeast of Little Bald Rock, about 300 yards east of Bean Creek Road, about 16 miles (air) northeast of Oroville. 1009 Comment
  CAS-BOT-BC342964  Madia gracilis Lowell Ahart 1981-8-15 3037 Butte Snag Lake (about 3 miles south of Jonesville) 1524 Comment
  CHSC111981  Madia gracilis Lowell Ahart 2012-6-2 18129 Butte Along sides of Truex Rd., w. of intersection of Truex Rd. and Trevor Rd., about 1/8 mi. nw of West Branch Bridge across dLake Oroville.. 286 Comment
  CHSC84184  Madia gracilis Lowell Ahart 2003-6-30 10323 A Butte Near the small stream, on the southeast side of Ponderosa Way, about 2 1/2 miles (by road) southwest of the Ponderosa Dam, about 2 miles (air) northwest of Forbestown. 578 Comment
  JEPS108728  Madia gracilis Lowell Ahart 2006-6-21 12804 Sierra On the west side of the Foote Road, about 3.7 miles (by road) southwest of Alleghany 1093 Comment
  RSA755648  Madia gracilis L. Ahart 2009-5-23 15722 Butte North side of Ten Mile House Road, Upper Bidwell Park, about 1/2 air mile southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 311 Comment
  CAS-BOT-BC343263  Madia gracilis Lowell Ahart 1981-7-21 2967 Plumas Sutter Buttes Area. Along Cleghorn Bar Road, about 2 miles west of Pilot Peak 1900 Comment
  CAS-BOT-BC345235  Madia subspicata Lowell Ahart 1980-5-17 2306 Butte 1/2 mile south-east of Hurleton 600 Comment
  CHSC113444  Maianthemum stellatum Lowell Ahart 2014-7-10 19620 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1664 Comment
  CHSC87891  Malacothrix floccifera Lowell Ahart 2004-6-18 11084 Glenn Gravel bar on the south side of Salt Creek, south of the bridge across Salt Creek, on the south side of Newville Road, about 1/4 mile west of Newville, about 5 miles (air) west of Black Butte Reservoir. 203 Comment
  RSA718374  Malacothrix floccifera L. Ahart 2006-6-21 12816 Sierra On the south side of the Foote Road, about 2.7 miles (by road) southwest of Alleghany 1104 Comment
  CHSC84131  Malva nicaeensis Lowell Ahart 2003-5-9 10121 Butte Along the southwest corner of a prune orchard, on the north side of Evans Reimer Road, about 3/4 mile west of Block Road, about 3 miles (air) southwest of Gridley. 24 Comment
  CHSC63257  Malva parviflora L. Ahart 1994-3-30 7277 Butte Garden area at the north-east corner of Oregon City School House, Oregon City, about 7 miles north of Oroville. 365 Comment
  JEPS104310  Malva parviflora Lowell Ahart 2003-5-9 10122 Butte Along the sw corner of a prune orchard, on the n side of Evans Reimer Rd, ca 3/4 mi w of Block Rd, ca 3 mi (air) sw of Gridley. 24 Comment
  CHSC31644  Marah fabacea var. agrestis L. Ahart 1974-2-25 305 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC101809  Marrubium vulgare Lowell Ahart 2009-6-12 15845 Butte 10 yards north of Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 80 yards east of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  CHSC98855  Marrubium vulgare Lowell Ahart; John Dittes, Josephine Guardino 2008-4-12 14682 Merced Grassy area on the south side of Dutchman Slough, about 100 yards east of the west fence, about 1/8 mile northwest of the windmill and corral, about 1/2 mile southwest of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  JEPS115835  Marrubium vulgare Lowell Ahart 2009-4-22 15581 Butte East side of the trail, Upper Bidwell Park, just west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 461 Comment
  SBBG119822  Marsilea vestita L. Ahart 2002-5-15 9659 Butte Gray Lodge State Wildlife Management Area, ca. 100 yds E of Parking Lot 10, ca. 4 air mi SW of Gridley 22 Comment
  JEPS114951  Marsilea vestita subsp. vestita Lowell Ahart, John Dittes 2008-8-26 15340 Modoc On the bottom of Rose Creek, 750 feet southwest of confluence of Rose Creek and Pit River, on the northwest side of unnamed road, 2660 feet east of intersection with County Road 85a, 9.3 miles (air) north-northeast of Lookout 1276 Comment
  JEPS115060  Marsilea vestita subsp. vestita Lowell Ahart 2007-11-8 14579 Yuba On the strand of Camp Far West Reservoir, about 1/2 mile south of Rock Creek, about 1/8 mile north of Bear River, about 6 miles (air) northeast of Sheridan 73 Comment
  JEPS115307  Matricaria discoidea Lowell Ahart 2009-4-3 15524 Butte Along margins of the gravel road, east of the Cedar Grove parking area in Lower Bidwell Park, Chico Comment
  CAS-BOT-BC348088  Matricaria discoidea Lowell Ahart 1987-5-6 5504 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap 271 Comment
  CDA31966  Medicago lupulina L. Ahart 2009-6-12 15842 Butte 10 yards north of the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 80 yards east of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC100363  Medicago lupulina Lowell Ahart; John Dittes 2008-8-26 15347 Modoc On the bottom of Rose Creek, 250 feet southwest of confluence of Rose Creek and Pit River, on the northwest side of unnamed road, 3160 feet east of intersection with County Road 85a, 9.3 miles (air) north-northeast of Lookout. 1276 Comment
  CDA38818  Medicago praecox L. Ahart 2012-4-9 17836 Butte Around the edged of a small vernal pool, west of the South Rim Trail, south part of Upper Bidwell Park, about 2 1/4 miles (air) northeast of Chico. Comment
  CHSC70851  Medicago praecox Lowell Ahart 1998-4-8 7947 Butte West of the dirt road, 1/10 mile north of the Thermalito Diversion Dam, east the Thermalito Diversion Pool, 1/4 mile northeast of Oroville. 67 Comment
  JEPS103484  Medicago praecox Lowell Ahart 2002-4-27 9566 Tehama In the road curve, on the N side of Road M2, ca 20 yards NW of the dirt road that leads to the tower, ca 8 miles W of Paskenta. 609 Comment
  CAS-BOT-BC271130  Melica aristata Lowell Ahart 1979-6-25 s.n. Yuba 1 mi. S of Challenge 700 Comment
  CHSC88189  Melica aristata Lowell Ahart 2004-7-23 11299 Butte On the east side of the road, north of the West Branch Campground, south of the Bridge across the West Branch of the Feather River, about 1 1/2 miles (air) west of Philbrook Reservoir Dam, about 3 3/4 miles (air) southeast of Butte Meadows. 1456 Comment
  CAS-BOT-BC282093  Melica fugax Lowell Ahart 1986-7-8 5346 Plumas About 1 mile NW of Pilot Peak, ca 14 miles NE of La Porte 1981 Comment
  JEPS106314  Melica geyeri Lowell Ahart 2004-6-22 11110 Butte On the east margin of a gravel road, road leads to Butte Creek, south of Doe Mill Road, about 1/8 mile southwest of the bridge across Butte Creek, about 2 miles (air) southeast of Forest Ranch, about 5 miles (air) west of Stirling City 692 Comment
  JEPS106168  Melica harfordii Lowell Ahart 2004-6-22 11112 Butte On the east margin of a gravel road, road leads to Butte Creek, south of Doe Mill Road, about 1/8 mile southwest of the bridge across Butte Creek, about 2 miles (air) southeast of Forest Ranch, about 5 miles (air) west of Stirling City 692 Comment
  SEINET10508160  Melica harfordii Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4713 Butte About 2 mi SW of Forbestown Diversion Dam, NE of Forbestown; Yellow Pine Forest; 700 m. 700 Comment
  JEPS114400  Melilotus albus Lowell Ahart 2008-7-18 15131 Nevada Along the P. G. & E. water ditch at the 3 1/4 mile mark, about one mile southwest of Highway 20 (by ditch), about 1/2 mile south of Bear Valley 1744 Comment
  JEPS114537  Melilotus albus Lowell Ahart, John Dittes 2008-8-25 15239 Merced On the banks and bottom of Dutchman Slough, about 220 yards south of the wire gate on the outh side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
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Oct 5 2019
  CHSC10579  Melilotus indicus Lowell Ahart 1966-5-7 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC107369  Melilotus indicus Lowell Ahart; John Dittes 2011-6-9 17459 Tehama Rio De Los Molinos Land Grant. On a farm road, about 40 yards northeast of the canal crossing, 1.6 miles (air) east of Highway 99, 2.1 miles (air) northeast of Vina. 76 Comment
  SEINET3449380  Melilotus indicus Lowell Ahart, John Dittes 2003-5-22 10213 Shasta Cottonwood, Cottonwood, about 12 air miles east/northeast, 2.8 air miles west/southwestof Darah Springs State Fish Hatchery, about 1/8 miles south of the Coleman Canal, about 250 yards northeast of the barn, north side of poor dirt road 250 Comment
  CHSC34144  Melissa officinalis L. Ahart 1981-9-27 3210 Butte On sides of dredger piles ca. 1/8 mi ne of jct of Lower Wyandotte Rd and Upper Palermo Rd, ca. 4 mi ne of Palermo. 80 Comment
  JEPS119627  Melissa officinalis Lowell Ahart 2012-6-14 18195 Butte About 100 yards east of Mangrove Avenue, Annie's Glen, Lower Bidwell Park, Chico. Comment
  CHSC102250  Mentha X piperita Lowell Ahart 2009-10-12 16439 Napa Along Capell Creek south of Rest Area, 3/4 mile northeast of Highway 128 on Berryessa Knoxville Road, 3/4 mile southwest of Capell Cove Launch Ramp on Berryessa Knoxville Road, about 19 miles (air) west of Winters. 134 Comment
  JEPS115119  Mentha arvensis Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16243 Plumas On damp bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam 1591 Comment
  SBBG127999  Mentha arvensis L. Ahart 2009-7-9 16009 Butte E side of Ten Mile House Rd, upper Bidwell Park, ca. 0.75 mi W of Hwy 32, ca. 10 mi NE of Chico 236 Comment
  HSC95823  Mentha canadensis L. Ahart, John Dittes 2003-9-17 10580 Tehama S side of Deer Creek, 400 yards E of Hwy. 99, 5 mi. SE of Los Molinos 61 Comment
  CHSC32109  Mentha pulegium L. Ahart 1969-8-12 31 Butte Near Honcut. 45 Comment
  CHSC75998  Mentha pulegium Lowell Ahart; Vernon Oswald 1999-8-13 8164 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS120744  Mentha pulegium Lowell Ahart 2013-10-19 19144 Glenn On the west side of the backwater, along the west of the Sacramento river, about 300 yards north of the bridge, west of Butte City. Comment
  CHSC84228  Mentha spicata Lowell Ahart 2003-7-17 10417 Yuba On the bottom of a stream, on the west side of Smartville road, about 2 miles north of the intersection of Waldo Road and Smartville Road, about 6 miles (air) south of Smartville. 129 Comment
  JEPS110060  Mentha spicata var. spicata Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC106171  Mentzelia albicaulis Lowell Ahart; John Dittes 2010-8-30 17089 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1274 Comment
  JEPS117562  Mentzelia albicaulis Lowell Ahart, John Dittes 2010-7-31 17019 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  CHSC101846  Mentzelia dispersa Lowell Ahart; John Dittes, Josephine Guardino 2009-6-14 15876 Plumas About 1600 feet southwest of Lake Almanor Dam. 1386 Comment
  JEPS102872  Mentzelia dispersa Lowell Ahart 2001-6-8 8780 Tehama S side of road M2, 9 mi W of Paskenta 792 Comment
  JEPS107292  Mentzelia dispersa Lowell Ahart, John Dittes 2005-6-1 11872 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  CHSC45980  Micranthes californica Lowell Ahart 1974-3-8 312 Butte Near North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  CAS-BOT-BC348319  Micropus californicus Lowell Ahart 1980-5-4 2168 Butte Thermalito 65 Comment
  CHSC94715  Micropus californicus var. californicus Lowell Ahart 2006-6-15 12769 Glenn On the west side of the creek, about 30 yards south of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford. 595 Comment
  JEPS115318  Micropus californicus var. californicus Lowell Ahart 2009-4-17 15554 Butte On the south slope of a ridge, about 300 yards west of Highway 32, near the south boundary, Upper Bidwell Park, about 5 miles (air) northeast of Chico 351 Comment
  JEPS94318  Micropus californicus var. californicus Lowell Ahart, Barbara Castro, Dan Barth, Diane Mastalir 1997-4-6 7723 Yuba about 17 mi ne of Marysville (on bank of the Browns Valley Water Ditch, s of the poor dirt road, s of Dry Creek, about 1 mi e of Scott Forbes Road (Long Bar Road)); Browns Valley Water Ditch 182 Comment
  CAS-BOT-BC349109  Microseris douglasii subsp. tenella Lowell Ahart 1985-5-5 4894 Sutter Near the first gate to the Dean Ranch, about 1/4 mile north of Mallott Road, about 2 miles north-east of Sutter, Sutter Buttes 35 Comment
  CHSC46335  Microseris elegans Lowell Ahart 1989-4-26 6203 Butte Along the edges of a dirt road, Peter Ahart Ranch, about 2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC84115  Microseris elegans Lowell Ahart; John Dittes 2003-5-12 10134 Shasta About 50 yards east of the barn, about 1/4 mile south of the Coleman Canal, 2.8 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 12 miles (air) east-northeast of Cottonwood. 265 Comment
  CHSC98812  Microseris elegans Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14604 Merced Growing on grassy slopes around vernal pools, about 20 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  CAS-BOT-BC349165  Microseris elegans Lowell Ahart 1979-5-21 s.n. Butte Peter Ahart Ranch. Honcut 50 Comment
  SEINET10474316  Microseris lindleyi Lowell Ahart 1985-5-5 Ahart 4903 Sutter Dean Ranch about 3 1/4 miles north-west of Sutter, Sutter Buttes. Comment
  JEPS126544  Microseris nutans Lowell Ahart, John Dittes 2016-6-6 20958 Modoc About 100 yards east of the Parking Area, about one mile south of the intersection of County Road 87 and Access Road to Pilot Butte Parking Area, 3.8 miles (air) east Lookout, 7.5 miles (air) west of Adin, Ash Creek State Wildlife Area. Comment
  JEPS128754  Microseris nutans Lowell Ahart, John Dittes, Josephine Guardino 2017-6-27 21469 Nevada About 50 yards north of the north edge of Carpenter Meadow, about 50 yards south of the poor dirt road, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. Comment
  CHSC44328  Microsteris gracilis Lowell Ahart 1976-4-10 1045 Nevada Along the edge of Mooney Road, south of the Engelbright Reservoir. 365 Comment
  CHSC45454  Microsteris gracilis Lowell Ahart 1981-4-6 2727 Sutter On the South side of the South Butte, Sutter Buttes. 182 Comment
  CHSC112646  Mimetanthe pilosa Lowell Ahart 2013-10-1 19072 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  SEINET10570210  Mimulus breweri Lowell Ahart, Peter Ahart 1983-10-27 Ahart 4489 Sierra Near a dirt road that is ca. 2 mi se of Jackson Meadow Reservoir, ca. 1 mi s of Pass Creek, near Jackson Meadow Reservoir. Red Fir Forest; 2200 m. 2200 Comment
  CHSC109586  Mimulus floribundus Lowell Ahart 2012-6-2 18147 Tehama Small pond or vernal pool, on the east side of Long Road, about 6.7 miles northeast of Dales and State Highway 36, northeast of Red Bluff. 326 Comment
  SEINET10570228  Mimulus glaucescens Lowell Ahart 1985-5-15 Ahart 4992 Butte 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow of Reservoir. Comment
  CDA41797  Mimulus guttatus L. Ahart 2004-10-4 11448 Lake Below the high water line of Indian Valley Reservoir, east of the causeway, in the northwest part of the reservoir, on the east side of Bartlett Springs Road. Comment
  SBBG128807  Mimulus guttatus L. Ahart 2013-5-1 18688 Colusa small drainage, N of the wash and St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  JEPS123992  Mimulus kelloggii Lowell Ahart 2015-5-9 20164 Sierra About 100 yards west of Highway 49, about one mile west of Indian Valley. Comment
  HSC96891  Mimulus layneae L. Ahart 2006-6-11 12664 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS87142  Mimulus leptaleus Lowell Ahart 1992-7-29 6870 Butte about 1/2 mi nw Lotts Lake (about 1 mi e of the Carr Mine) 1828 Comment
  UC1594557  Mimulus leptaleus Lowell Ahart 1992-7-29 6870 Butte about 1/2 mi nw Lotts Lake (about 1 mi e of the Carr Mine) 1828 Comment
  JEPS107776  Mimulus microphyllus Lowell Ahart 2005-5-2 11781 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico 25 Comment
  CHSC42965  Mimulus moschatus Lowell Ahart 1987-7-3 5786 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  RSA754817  Mimulus moschatus L. Ahart 2009-6-30 15978 Butte Along a small flowing stream about 55 yards SE of the gate, about 45 yards E of Ten Mile House Road, Upper Bidwell Park, about 3/4 air miles W of Highway 32, about 10 miles NE of Chico. 270 Comment
  UC1609351  Mimulus nanus var. mephiticus Lowell Ahart 1993-7-31 7146 Butte about 1/2 mi n Ramsey Bar (on a log landing e of the dirt road that leads to Ramsey Bar) 1371 Comment
  SEINET10570288  Mimulus tricolor Lowell Ahart 1983-6-6 Ahart 4029 Butte Peter Ahart Ranch, ca. 2.5 mi ne of Honcut. Valley Grassland; 50 m. 50 Comment
  CDA24059  Minuartia douglasii L. Ahart 2006-5-5 12574 Tehama Along the Nomalaki Trail (Thomes Gorge Trail), about 100 yards west of China Gulch, about 1/4 mile south of Bowers Creek, about 3/4 mile northwest of Forest Road 23N69 (Mud Flat Road), about 6 1/2 miles (air) southwest of Paskenta. Comment
  JEPS95547  Mitella breweri Lowell Ahart 1994-7-1 7431 Sierra 11 air miles NE of Alleghany (S of the larger pond, N side of Henness Pass Road, at Keystone Gap, E of Keystone Mountain, 1 1/2 mi NE of Middlewaters) 1889 Comment
  JEPS98394  Mitella breweri Lowell Ahart 2000-7-28 8620 Nevada just N of a small spring, E side of Fall Creek 200 yds E of Forest Hwy 18 (Bowman Lake Rd), 5 air miles (8 rd miles) N of Hwy 20 and Bear Valley 1706 Comment
  CHSC116635  Moenchia erecta subsp. erecta Lowell Ahart 2016-4-15 20744 Butte On both sides of Swedes Flat road, about 1/2 mile southwest of Dutch Ravine, about 8 miles (air) southeast of Oroville. 384 Comment
  CHSC97743  Mollugo verticillata Lowell Ahart 2007-11-3 14569 Butte Below the high water line of Lake Oroville, about 3/4 mile east of the Power House below Kunckle Reservoir, about 1 1/4 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise. 259 Comment
  JEPS115056  Mollugo verticillata Lowell Ahart 2007-11-3 14569 Butte Below the high water line of Lake Oroville, about 3/4 mile east of the Power House below Kunckle Reservoir, about 1 1/4 miles north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise 259 Comment
  JEPS93834  Mollugo verticillata Lowell Ahart 1998-7-1 8029 Butte about 7 air mi n of Oroville (20 yards s of a east west fence, in the tracks of poor dirt road about 5/8 mi n of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain 403 Comment
  RSA0106565  Mollugo verticillata Lowell Ahart 2014-9-23 19870 Butte On the northeastern part of Horseshoe Lake, about 100 yards northeast of the Rod and Gun Club, Upper Bidwell Park, about one mile east of Chico. 89 Comment
  SEINET10911429  Mollugo verticillata Lowell Ahart 2007-11-13 Ahart 14598 Placer T14N, R6E, northeast 1/4 Section 27. Normal size plants, on dry mud, on the strand of Camp Far West Reservoir, about 300 yards west of Bear River, about 1/8 mile east of McCourtney Road, about 5 1/2 miles (air) northeast of Sheridan. Foothill Woodland (destroyed). 242 Comment
  RSA401578B  Monardella lanceolata var. lanceolata L. Ahart 1984-5-28 4652 Butte On a large road cutbank along Hwy 40, now called Dark Canyon Rd, ca. 2 mi E of Old Yankee Hill, ca 16 mi NE of Oroville. 450 Comment
  JEPS127339  Monardella odoratissima subsp. glauca Lowell Ahart 2016-7-9 21088 Plumas Top and on the northeast side of Table Mountain, about 2 miles (air) northwest of Tamarack Flat, about 4 miles (air) northwest of Little Grass Valley Reservoir Dam. Comment
  CHSC82555  Monardella odoratissima subsp. pallida Lowell Ahart 2002-7-18 9857 Plumas Basalt ridge, about 1/8 mile north of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, about 1 1/2 miles (air) northwest of Little Grass Valley Reservoir dam, about 4 1/2 miles (air) northwest of La Porte. 1743 Comment
  CAS-BOT-BC220458  Monardella sheltonii Lowell Ahart 1983-6-21 4083 Butte Along Bloomer Hill Road, about 3/4 mile west of the Oroville Quincy Highway, about 15 miles north-east of Oroville 425 Comment
  CAS-BOT-BC220480  Monardella sheltonii Lowell Ahart 1986-7-25 5373 Plumas Along Cleghorn Bar Road, about 1 1/2 miles west of Finger Board, about 4 miles north-west of Pilot Peak 1828 Comment
  CHSC94886  Monardella villosa subsp. villosa Lowell Ahart 2006-6-11 12672 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CHSC116086  Monolepis nuttalliana Lowell Ahart; John Dittes 2015-7-13 20311 Lassen Along levee road, about 300 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC10724  Montia fontana subsp. chondrosperma Lowell Ahart 1969-3-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC112450  Montia linearis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18736 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA725281  Muhlenbergia andina L. Ahart 2006-8-15 13174 Butte About 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1570 Comment
  CAS-BOT-BC263356  Muhlenbergia asperifolia Lowell Ahart 1987-5-27 5708 Butte On a sand bar along the North Fork of teh Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap 271 Comment
  CHSC47623  Muhlenbergia filiformis Lowell Ahart 1980-8-12 2567 Yuba Gravel bar, Slate Creek, a little below where Gold Run Creek flows into Slate Creek, above Onion Creek, about 7 miles south of La Porte. 1158 Comment
  CHSC51290  Muhlenbergia filiformis Lowell Ahart 1990-10-21 6636 Butte Below the high water line of Lake Oroville, about 1 mile north of Nelson Bar Road, about 1/2 mile west of Gold Flat. 213 Comment
  CHSC76407  Muhlenbergia filiformis Lowell Ahart; Vernon H. Oswald 1999-10-3 8284 Butte Area along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS116018  Muhlenbergia filiformis Lowell Ahart 2009-11-19 16546 Butte About 80 yards southeast of the gate, about 70 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  CHSC34166  Muhlenbergia mexicana L. Ahart 1981-9-19 3182 Butte Along banks of Feather River ca. 100 m n of Arch Rock Tunnel on Hwy 70, ca. 10 mi s of Storrie. 550 Comment
  JEPS121900  Muhlenbergia minutissima Lowell Ahart 2014-7-10 19639 Butte About 80 yards south of Philbrook Road, about 1 1/4 miles west of Philbrook Reservoir. Comment
  CAS-BOT-BC275161  Muhlenbergia richardsonis Lowell Ahart 1981-8-15 3040 Butte Snag Lake, about 3 miles S of Jonesville 1524 Comment
  CHSC97612  Muhlenbergia richardsonis Lowell Ahart; John Dittes 2007-6-17 14166 Plumas On damp soil, along bank of Red Clover Creek, about 30 yards east of County Road 111 (Beckwourth Gensee Road), about 1/4 mile east of bridge across Red Clover Creek, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1654 Comment
  SEINET256387 Image available Muhlenbergia richardsonis Lowell Ahart 1985-7-11 5126 Plumas Below the high water line of Little Grass Valley Reservoir where the South Fork of the Feather River flows into the lak 1585 Comment
  CAS-BOT-BC274890  Muhlenbergia rigens Lowell Ahart 1983-8-4 4260 Sutter On W side of South Butte, Sutter Buttes 60 Comment
  CAS-BOT-BC274891  Muhlenbergia rigens Lowell Ahart 1983-8-27 4346 Sutter S of Myers Ranch, ca. 1 miles S of Myers home 50 Comment
  CHSC99162  Myosurus minimus Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14633 -A Merced On dry soil, bottom of vernal pools, about 40 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  UC1609490  Myriophyllum aquaticum Lowell Ahart 1993-10-31 7271 Butte ca. 4 mi. e. Palermo (on n. side of Grubbs Rd.) 152 Comment
  JEPS102520  Myriophyllum sibiricum Lowell Ahart 2001-9-18 9278 Plumas In shallow water of Freeman Creek, on the strand of Lake Davis. 1761 Comment
  JEPS102860  Myriophyllum sibiricum Lowell Ahart 2001-10-8 9334 Plumas On the west side of Indian Creek, about 400 yards south of Arlington Road, about 200 yards east of Highway 89, about 1 1/2 miles south of Crescent Mills. 1066 Comment
  CHSC80653  Myriophyllum spicatum Lowell Ahart 2001-6-3 8749 Butte On the west side of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville. 38 Comment
  CHSC110985  Myrtus communis Lowell Ahart; Susan Bazell, Josephine Guardino, Wes Dempsey 2012-6-21 18226 Butte North side of Caper Acres Playground, Lower Bidwell Park, Chico. 62 Comment
  CHSC43311  Nama densa Lowell Ahart 1974-7-9 543 Lassen Along the edge of the road, near the wouth-west edge of Eagle Lake. 1584 Comment
  CHSC78348  Narthecium californicum Lowell Ahart 2000-7-13 8592 Sierra On a upper west branch of Black Jack Ravine, on the west side of Forest Highway 98, Harris Meadow, about 7 miles (air) northeast of Alleghany. 1615 Comment
  CHSC88162  Narthecium californicum Lowell Ahart 2004-8-2 11321 Butte Large bog, the start of a small branch of Keyser Creek, on the south side of the dirt County Road, about 1/4 mile (air) east of Bald Mountain, about 4 miles (air) northeast of Stirling City. 1689 Comment
  RSA755315  Nasturtium officinale L. Ahart 2009-6-3 15819 Butte W side of Ten Mile House Road, about 100-200 yards NW of the table at the old homestead, Upper Bidwell Park, about 3/4 air miles SW of the intersection of Hwy 32 and Ten Mile House Road, about 10 miles NE of Chico. 232 Comment
  CHSC108113  Navarretia capillaris Lowell Ahart 2011-9-23 17704 Sierra About 50 yards north of Pass Creek, about 350 yards south of Hennas Pass Road, west of French Meadow, east of Forest Road 70, about 3 miles (air) northwest of Webber Lake. 2016 Comment
  CHSC80852  Navarretia capillaris Lowell Ahart 2001-7-17 8933 Plumas On the west side of a branch of Butt Creek, on the north side of the dirt road, a little west of Ruffa Ranch, about 1 mile (air) north of Eagle Rocks, about 2 miles (air) northeast of Humboldt Summit. 1706 Comment
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Nov 23 2007
  RSA718390  Navarretia divaricata subsp. vividior L. Ahart 2006-7-3 12905 Plumas About 0.25 mile N of Lumpkin Ridge road, on Lumpkin Ridge, 4 miles (air) NE of Camp 18. 1528 Comment
  JEPS120030  Navarretia filicaulis Lowell Ahart 2012-6-9 18180 Butte On the north side of Guardian Trail, about 50 yards southwest of Ten Mile House Road, about 1/8 mile west of Highway 32, Upper Bidwell Park, about 9 miles northeast of Chico. Comment
  CHSC91110  Navarretia heterandra Lowell Ahart 2005-5-28 11823 Butte Pasture, on the north side of Falager Ct., south of the Durham Pentz Road, east of Highway 99 East, about 4 miles east of Durham. 70 Comment
  JEPS107895  Navarretia heterandra Lowell Ahart 2005-5-28 11824 Butte Bottom of vernal pools, pasture, on the north side of Falager Ct., south of the Durham Pentz Road, east of Highway 99 East, about 4 miles east of Durham 67 Comment
  CHSC97642  Navarretia intertexta subsp. intertexta Lowell Ahart 2007-5-12 13805 Yuba Bottom of a swale, about 100 feet northeast of a culvert, about 50 yards north of the second power tower, about 400 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 28 Comment
  CHSC97607  Navarretia intertexta subsp. propinqua Lowell Ahart; John Dittes 2007-6-16 14131 Plumas Graded road gutter, east of the small stream, on the south side of County Road 111 (Beckwourth Genesee Road), 50 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1647 Comment
  SEINET13711098  Navarretia jepsonii Lowell William Ahart, Lowell William Ahart 2003-1 10385 Colusa 21 Road Mi. SW of Williams, 2 Mi. SW Jct. Hwy 20 and Bear Valley Road (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  CHSC96460  Navarretia leucocephala subsp. leucocephala Lowell Ahart; Brian Williams 2007-4-13 13664 Placer On the bottom of vernal pools, about 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln. 43 Comment
  JEPS104317  Navarretia leucocephala subsp. leucocephala Lowell Ahart 2003-5-28 10232 Butte Bottom of Hendricks ditch, ca 1 3/4 mi w of the iron gate and fence, w of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 271 Comment
  CHSC113072  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2013-7-22 18852 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS102887  Navarretia mellita Lowell Ahart 2001-6-14 8827 Tehama On the W side of the dirt road that leads to the tower, on the E side of road M2, ca 8 miles W of Paskenta. 609 Comment
  JEPS105973  Navarretia mellita Lowell Ahart 2004-6-11 11045 Tehama East of a small seep across and on the north side of the Nomalaki Trail, about 1/4 mile north of Bowers Creek, about 1 mile northwest of Forest Road 23N69 (Mud Flat Road), about 6 1/2 miles (air) southwest of Paskenta 582 Comment
  CHSC109101  Nemophila heterophylla Lowell Ahart 2012-3-23 17783 Butte On the sides of the trail down to Big Chico Creek, about 50 yards west of Ten Mile House Road, about 3/4 mile west of Highway 32, about 9 miles (air) northeast of Chico. 215 Comment
  JEPS114643  Nemophila pedunculata Lowell Ahart, John Dittes 2008-6-20 14918 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA718167  Nemophila spatulata L. Ahart 2006-7-11 12948 Tehama On the high east bank of Colby Creek, about 50 yards north of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows. 1519 Comment
  JEPS124133  Nicotiana acuminata var. multiflora Lowell Ahart 2015-11-7 20625 Butte West of the parking area at the end of Old Highway Alternate 40, strand of Lake Oroville, Dark Canyon, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. Comment
  CHSC106075  Nicotiana attenuata Lowell Ahart; John Dittes 2010-7-31 17022 Lassen On the north side of the road, about 40 yards west of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  JEPS117369  Nicotiana attenuata Lowell Ahart, John Dittes 2010-8-30 17081 Modoc Parking Area west of the old barn, on the west side of Elkins Lane, Ash Creek State Wildlife area, 320 feet north of Lassen County Line, about 4.4 miles (air) west of Adin, about 7.2 miles (air) northeast of Bieber, Big Valley 1266 Comment
  CHSC32098  Oenothera elata subsp. hirsutissima L. Ahart 1977-8-22 1556 Yuba Near irrigation ditch, ca. 4 mi e of Marysville. 40 Comment
  CHSC99948  Onopordum acanthium Lowell Ahart; John Dittes 2008-8-25 15275 Modoc On the west bank (flood plane) of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout. 1273 Comment
  CHSC47370  Ophioglossum californicum Lowell Ahart 1982-12-1 3900 Butte Joie Osgood Ranch, about 1 mile north-east of Honcut Cemetery, 4 miles north-east of Honcut. 79 Comment
  JEPS95517  Orobanche uniflora Lowell Ahart 1994-4-22 7286 Butte 3 1/2 mi SW of Forbestown (S of int of Black Bart Road and Forbestown Road) 609 Comment
  CAS-BOT-BC500245  Orobanche uniflora subsp. occidentalis Lowell Ahart 1979-4-17 s.n. Butte 2.5 mi W of Bangor, 1/2 mi S of Avocado Ave. and S of teh Blue Lead Mine 100 Comment
  CAS-BOT-BC502942  Orobanche uniflora subsp. occidentalis Lowell Ahart 1981-4-13 2759 Sutter Sutter Buttes: just W of the Dean Cabin 350 Comment
  CHSC115825  Orthilia secunda Lowell Ahart; John Dittes, Josephine Guardino, Steve Green 2015-7-31 20421 Plumas On the south side of Blue Lake, 2710 feet north of Forest Service Road 29N18, 289 air-miles west-southwest of Sifford Mt., 6.26 air-miles south-southeast of Lassen Peak. 1918 Comment
  CHSC66526  Orthilia secunda Lowell Ahart 1996-7-25 7693 Sierra Open forest, south of the old Henness Pass Road, just west of French Meadow, about 2 miles west of Webber Lake. 1950 Comment
  CHSC69043  Orthilia secunda Lowell Ahart 1997-8-1 7780 Butte Near some small streamlets of Little Kimshew Creek, in Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 Comment
  RSA325942  Orthocarpus campestris L. Ahart 1984-4-25 4585 Butte Peter Ahart Ranch, 2.5 miles Ne of Honcut, 12 miles S of Oroville, Valley Grassland. 50 Comment
  SEINET10507736  Oryzopsis micrantha Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4690 Butte Along edge of a new subdivision road ca. 1 mi SE of Hurleton, 1/12 mi E of Oak Grove Cemetary, ca. 10 mi E of Oroville; Foothill Woodland; 500 m. 500 Comment
  CHSC94380  Osmorhiza chilensis Lowell Ahart 2006-7-19 13045 Tehama Forest along the west side of the abandoned logging road, about 170 yards northeast of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 1/8 miles (air) northeast of Butte Meadows. 1540 Comment
  CHSC58872  Osmorhiza occidentalis Lowell Ahart 1992-7-29 6877 Butte About 1 mile north-east of the Carr Mine, about 3/4 mile north-west of Lotts Lake. 1798 Comment
  JEPS104283  Oxalis laxa Lowell Ahart 2003-4-30 10119 Butte Between dredge tailings, where there is a brake in the levee, ca 100 yd south of the Feather River, on the w side of the dirt road in the Oroville Wildlife Area, ca 3/5 of a mi w of Pacific Heights Rd, ca 5 1/2 mi (air) sw of Oroville. 39 Comment
  HSC92457  Oxalis laxa L. Ahart 1975-5-12 766 Butte Along N Honcut Creek, Peter Ahart Ranch, ca. 1 mi. N and 2.5 mi. E of Honcut, ca. 12 mi. S of Oroville 43 Comment
  JEPS119639  Oxalis pes-caprae Lowell Ahart 2012-4-6 17808 Butte On the north side of Big Chico Creek, Lost Park in Bidwell Park, City of Chico. Comment
  SEINET13709252  Oxypolis occidentalis Lowell William Ahart, Lowell William Ahart 2001-1 9295 Sierra 2 Mi. SE of Town of Poverty Hill, 1.25 Mi. N of Scales (T20N, R9E, sec 9, Ctr) 5000 Ft. 1524 Comment
  CAS-BOT-BC413169  Oxyria digyna Lowell Ahart 1977-8-2 s.n. Sierra Found near the summit of Mt. Fillmore. On the north side of Mt. Fillmore. Mt. Fillmore is about 12 miles north-east of La Porte 2400 Comment
  CHSC44888  Packera cana Lowell Ahart 1977-8-2 1522 Sierra On an open ridge, on the west side of Mount Fillmore, near the summit, about 12 air miles north-east of La Porte. 2194 Comment
  JEPS114621  Packera cana Lowell Ahart, John Dittes 2008-6-19 14877 Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  CHSC39363  Packera streptanthifolia L. Ahart; P. Ahart 1983-8-17 4322 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. 2000 Comment
  CHSC67450  Packera streptanthifolia Lowell Ahart 1979-7-18 X 2000 Plumas On the hill south of Onion Valley Reservoir, about one mile west of Pilot Peak, about 12 miles north of La Porte. 1828 Comment
  CHSC44564  Panicum acuminatum Lowell Ahart 1979-6-25 1949 Yuba North of the road, about 2 miles east of Challenge. 640 Comment
  JEPS115994  Panicum acuminatum var. acuminatum Lowell Ahart 2009-6-3 15832 Butte On the east side of Big Chico Creek, southwest of the meadow, about 30 yards west of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 209 Comment
  RSA718512  Panicum acuminatum var. acuminatum L. Ahart 2006-10-23 13499 Plumas On the east side of Slate Creek (there is a large gravel flat caused by the dam), about 30 yards south of where the road ends, about 20 yards north of the dam across Stale Creek., About 1/8 mile northeast of Scales Road, about 5.5 miles (air) northeast of Strawberry Valley. 1282 Comment
  CAS-BOT-BC253697  Panicum capillare Lowell Ahart 1982-10-15 3890 Butte Bottom of North Honcut Creek, about 1 mile N and 2.75 miles E of Honcut 50 Comment
  CHSC81645  Panicum capillare Lowell Ahart 2001-10-8 9321 Plumas Below the high water line of Antelope Lake, at the day camp that is north of Dedication Island, Antelope Lake, about 24 miles (air) northeast of Quincy. 1522 Comment
  JEPS114790  Panicum dichotomiflorum Lowell Ahart, John Dittes 2008-8-22 15266 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  JEPS104186  Paronychia ahartii Lowell Ahart 2003-5-12 10143 Shasta Pasture field, ca 350 yd south of the barn, ca 1/4 mi south of the Coleman Canal, 2.8 mi (air) wsw of Darah Springs State Fish Hatchery, ca 12 mi (air) ene of Cottonwood. 265 Comment
  SEINET10449696  Parvisedum pumilum Lowell Ahart 1983-9-4 Ahart 4373 Sutter Dean Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 250 m. 250 Comment
  CAS-BOT-BC259746  Paspalum distichum Lowell Ahart 1983-9-4 4379 Sutter About 0.25 mile below the dam, SE of the Dean Cabin, Dean Ranch, Sutter Buttes 250 Comment
  RSA724980  Paspalum distichum L. Ahart 2006-9-26 13352 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CAS-BOT-BC258768  Paspalum urvillei Lowell Ahart 1987-10-16 5912 Butte Along Oroville Quincy Highway, along the edge of Madrone Lake 609 Comment
  CHSC43493  Pedicularis semibarbata Lowell Ahart 1975-8-17 942 Sierra South-east of Jones Valley, about 3 miles west and 2 miles south of Webber Lake. 2286 Comment
  JEPS95787  Pedicularis semibarbata Lowell Ahart 1999-7-26 8098 Nevada on both sides of Grouse Ridge Road (Road 14) and just northeast of the Lookout; about 6 miles northeast of Bowman Lake Road (Road 18); about 4 miles (air) south of Bowman Lake 2316 Comment
  CHSC46030  Pellaea andromedifolia Lowell Ahart 1976-3-7 1021 Napa About 1/8 mile south of the road, about 2 miles south-west of Monticello Dam. 152 Comment
  JEPS115072  Pellaea andromedifolia Lowell Ahart 2007-11-3 14550 Butte West of the high water line of Lake Oroville, about 1/2 mile east of the Power House below Kunckle Reservoir, about one mile north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise 322 Comment
  JEPS95339  Pellaea bridgesii Lowell Ahart 1994-7-1 7439 Sierra 11 air miles NE of Alleghany (W side of the larger pond, N side of Henness Pass Road, at Keystone Gap, E of Keystone Mountain, 1 1/2 mi NE of Middlewaters) 1889 Comment
  CHSC40635  Pellaea mucronata Ahart; Jokerst 1985-3-24 4855 Butte Serpentine Point, west of Yankee Hill. 550 Comment
  UC1609391  Pellaea mucronata var. mucronata Lowell Ahart 1993-7-6 7063 Butte ca. 9 air mile nw of Lost Creek Reservoir Dam (Mooreville Ridge, Jackass Flat); Jackass Flat, Mooreville Ridge 1158 Comment
  SEINET13709361  Penstemon heterodoxus Lowell William Ahart, Lowell William Ahart, V. H. Oswald 1998-1 9329 Siskiyou Hwy. 97 Between Weed and Macdoel at E End Grass Lake (T44N, R3W, sec 24, SE 1/4) 5000 Ft. 1524 Comment
  CHSC87371  Penstemon heterophyllus var. purdyi Lowell Ahart 2004-5-2 10845 Sutter Mountainside, on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter. 540 Comment
  JEPS102781  Penstemon neotericus Lowell Ahart 2001-6-16 8847 Tehama On the south side of the dirt road, about 5 miles west of Highway 32, west of Soda Springs Campground, about 5 miles (air) west of Butte Meadows. 1082 Comment
  CHSC81161  Penstemon rydbergii var. oreocharis Lowell Ahart 2001-8-29 9235 Plumas On the west side of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 Comment
  CHSC32070  Pentagramma triangularis L. Ahart 1973-5-25 244 Sierra Near Alleghany. 914 Comment
  CAS-BOT-BC77133  Pentagramma triangularis subsp. semipallida Lowell Ahart 1976-7-7 s.n. Butte Near Little North Fork of Feather River. 50 Comment
  CHSC101304  Pentagramma triangularis subsp. triangularis Lowell Ahart 2009-4-22 15564 Butte South side of Guardians Trail, about 50 yards west of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  JEPS104146  Pentagramma triangularis subsp. triangularis Lowell Ahart 2003-4-15 10088 Butte Northeast of the tall Digger Pine on the south edge of Beatson Hollow, ca 3/4 mi nw of the iron gate and fence, nw of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 299 Comment
  JEPS106113  Pentagramma triangularis subsp. triangularis Lowell Ahart 2004-6-22 11119 Butte On the east side of Doe Mill Road, about 1/4 mile southeast of the bridge across Butte Creek, about 2 1/4 miles (air) southeast of Forest Ranch, about 5 miles (air) west of Stirling City 628 Comment
  CHSC117007  Perideridia bolanderi subsp. bolanderi Lowell Ahart 2016-6-29 21068 Plumas Top of Table Mountain, about 2 miles (air) northwest of Tamarack Flat, about 4 miles (air) northwest of Little Grass Valley Reservoir Dam. 1857 Comment
  JEPS113502  Perideridia lemmonii Lowell Ahart 2007-7-8 14267 Butte On the west side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville 53 Comment
  JEPS114797  Perideridia lemmonii Lowell Ahart 2008-8-13 15168 Plumas East of La Porte Road, east bank of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1613 Comment
  RSA0039542  Perideridia lemmonii Lowell A. Ahart 2008-8-13 15168 Plumas East of La Porte Road, east bank of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about 1 mile northeast of La Porte. 1613 Comment
  SEINET10454551  Perideridia lemmonii Lowell Ahart, Peter Ahart 1985-7-9 Ahart 5112 Butte About 8 miles north-east of Feather Falls. Comment
  CAS-BOT-BC413474  Persicaria amphibia Lowell Ahart 1987-8-3 5852 Butte E of the Western Pacific Railroad S of Central House Road, ca. 1.5 mi. N and 1 mi. W of Honcut 30 Comment
  CHSC47471  Persicaria hydropiper Lowell Ahart 1989-11-12 6402 Butte On the bottom of a shallow wash, in the borrow area, about 1/4 mile south of the Feather River, about 4/10 mile west of Pacific Heights Road, about 4 1/2 miles south-west of Oroville. 30 Comment
  CAS-BOT-BC418956  Persicaria lapathifolia Lowell Ahart 1986-11-9 5452 Butte About 1/10 mile south of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miles south-west of Oroville 36 Comment
  CHSC81810  Persicaria lapathifolia Lowell Ahart 2001-11-2 9394 Yuba Camp Far West Reservoir, about 1/4 mile northeast of the dam, about 9 miles (air) southeast of Wheatland. 83 Comment
  HSC104005  Persicaria lapathifolia L. Ahart 2013-11-17 19262 Butte About 5/8 mi. SW of the Enterprise Bridge across Lake Oroville, below the high water line of Lake Oroville, along the sides of McCabe Creek 245 Comment
  CHSC76289  Persicaria maculosa Lowell Ahart 1999-9-17 8242 Yuba On the margins of a rice field, south of Woodruff Lane, just east of Mathews road, east of Sam Shintaffer's rice dryer, about 5 miles (air) northeast of Marysville. 24 Comment
  CHSC51274  Persicaria punctata Lowell Ahart 1990-10-3 6620 Butte On the bottom of the East Fork of Canyon Creek, below the high water line of Lake Oroville, about 1/4 mile north-east of the Canyon Creek Bridge across Lake Oroville. 259 Comment
  CHSC72252  Persicaria punctata Lowell Ahart 1998-9-11 8055 Butte Seep area west of the cattle chute on the west side of Cherokee Road, North Table Mountain, about 7 (air) miles north of Oroville. 403 Comment
  CHSC84611  Persicaria punctata Lowell Ahart; John Dittes 2003-9-17 10599 Tehama On a gravel bar on the south side of Deer Creek, about 400 yards east of Highway 99, about 5 miles (air) southeast of Los Molinos. 60 Comment
  CHSC94786  Persicaria punctata Lowell Ahart 2006-10-8 13428 Butte Mud flat, near a large gravel bar, east side of the North Fork of the Feather River, just east of where the river flows into a pool, on the west side of Highway 70, about 1/2 mile north of the Cresta Power House. 609 Comment
  CHSC112283  Petrorhagia dubia Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18622 Mendocino Outer North Coast Range. Disturbed edges of Mountain View Road, 275 feet northeast of confluence of Bear Wallow and Honey Creeks. 237 Comment
  CHSC98957  Petrorhagia dubia Lowell Ahart 2008-5-12 14759 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 100 yards north of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile west of the Ponderosa Dam. 258 Comment
  SD122565  Phacelia cicutaria Lowell Ahart 1984-5-21 4633 Sutter East of where the road forks to go to each radio tower, near the lower radio tower on South Butte, Sutter Buttes, west of Marysville. 675 Comment
  UC1594635  Phacelia egena Lowell Ahart 1992-9-20 6922 Butte about 1/8 mi w Enterprise Boat Launch Ramp (below high water line of lake, 3/4 mi sw of Rocky Point); Lake Oroville 243 Comment
  CHSC91193  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11952 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  SEINET12329569  Phacelia imbricata L. Ahart, Ahart, P. 1984-1 4654 Butte along Hwy 40, now called Dark Canyon Rd, ca 2 mi E of Old Yankee Hill, 16 mi NE of Oroville 450 Comment
  CHSC112609  Phacelia imbricata subsp. imbricata Lowell Ahart 2013-9-11 19033 Plumas Gravel bar on the west side of Chips Creek, about 20 yards south of Highway 70, about one mile southwest of Belden. 676 Comment
  RSA719182  Phacelia mutabilis L. Ahart 2006-7-19 13049 Tehama East side of a large meadow and bog, about 40 yards west of the abandoned logging road, about 250 yards north of where the dirt road crosses Colby Creek., About 2 miles (air) southeast of Colby Mountain, about 45 1/8 miles (air) northeast of Butte Meadows. 1541 Comment
  CHSC46638  Phacelia racemosa Lowell Ahart 1989-7-2 6350 Plumas In small openings, north of here the dirt road forks, the south fork leads to the Lookout to Pilot Peak, about 1/4 mile north of Pilot Peak, about 10 miles north-east of La Porte. 2103 Comment
  JEPS118492  Phacelia racemosa Lowell Ahart 2011-9-23 17701 Sierra About 80 yards north of Pass Creek, about 320 yards south of Hennas Pass Road, west of French Meadow, east of Forest Road 70, about 3 miles (air) northwest of Webber Lake.siz 2016 Comment
  CHSC61545  Phalaris lemmonii Lowell Ahart 1993-5-15 6943 Butte Rice field, east of the Cherokee Canal and north of the Biggs Princeton Road, about 3 miles west of Biggs. 30 Comment
  CHSC75338  Phalaris lemmonii Lowell Ahart 1999-5-21 8069 Butte In a pasture, 50 yards north of Evans Reimer Road, about 7/8 mile east of Pennington Road, about 5 miles (air) southwest of Gridley. 21 Comment
  CHSC46440  Phalaris paradoxa Lowell Ahart 1989-5-23 6255 Butte Along the edges of Avocado Road, about 1/2 mile west of the Oroville Bangor Highway, about 1 mile north-west of Bangor. 213 Comment
  CHSC45972  Philadelphus lewisii Lowell Ahart 1984-6-8 4659 Butte Along the edge of Ponderosa Way, about 1/8 mile west of the Ponderosa Dam, about 2 miles north-west of Forbestown. 365 Comment
  SEINET10482893  Philadelphus lewisii subsp. californicus Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4080 Butte T20N R5E sec 6. Along Bloomer Hill Rd, ca. 3/4 mi w of Oroville-Quincy Hwy, ca. 15 mi ne of Oroville. Foothill Woodland; 425 m. 425 Comment
  CHSC54576  Phleum alpinum Lowell Ahart 1991-7-22 6683 Sierra In French Meadow, about 1/4 mile south of Henness Pass Road, about 3 miles north-west of Webber Lake. 2133 Comment
  UC1586504  Phleum alpinum Lowell Ahart 1991-7-22 6693 Sierra about 3 mi nw Webber Lake (about 1/4 mi s of Henness Pass Road); French Meadow 2133 Comment
  RSA726389  Phleum pratense L. Ahart, Josephine Guardino 2007-7-21 14360 Plumas Near a spring, open dry flat, south of the dirt road, about 1/2 mile (air) south of Bagley Pass, about 400 yards north of Lake Davis. 1788 Comment
  CHSC75806  Phlox diffusa Lowell Ahart; Vernon H. Oswald 1999-7-26 8100 Nevada North side of Grouse Ridge Road (Road 14) and northeast of the lookout, about 6 miles northeast of Bowman Lake Road (Road 18), about 4 miles (air) south of Bowman Lake. 2316 Comment
  CAS-BOT-BC141248  Phoradendron serotinum subsp. tomentosum Lowell Ahart 1980-9-10 2624 Butte Little Bald Rock 335 Comment
  RSA726563  Phoradendron villosum L. Ahart 2007-10-25 14504 Sierra About 1.5 miles north of Scales, about 5 miles (air) south of La Porte. 1433 Comment
  CDA32124  Phyla nodiflora L. Ahart, John Dittes 2008-8-21 15247 Merced On the high sides of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. Comment
  CHSC84424  Phyllodoce breweri Lowell Ahart 2003-9-2 10549 Nevada Open ridge, north of the trails to the east and south, about 100 yards east of Grouse Ridge Road (Road 14) and east of the Lookout, about 6 miles northeast of Bowman Lake Road (Road 18), about 4 miles (air) south of Bowman Lake. 2259 Comment
  CHSC11340  Physalis lancifolia Lowell Ahart 1972-11-4 Butte Peter Ahart Ranch, Honcut. 45 Comment
  JEPS117389  Physalis lancifolia Lowell Ahart, John Dittes 2010-10-4 17284 Tehama Along Toomes Creek, Toomes Creek at Tehama-Vina Road crossing, 1.2 miles (air) east of the Sacramento River, 3.4 miles (air) southeast of Los Molinos (High School), 3.0 miles (air) northwest of Vina 57 Comment
  CAS-BOT-BC140565  Physocarpus capitatus Lowell Ahart 1982-6-1 3526 Butte About 1/2 mile south-west of the intersection of Black Bart Road and Forbestown Road, west of Forbestown 750 Comment
  CHSC100484  Phytolacca americana Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15435 Butte On the south side of the gravel road and Big Chico Creek, about 30 yards east of the end of Chico Canyon Road, Upper Bidwell Park, Chico. 68 Comment
  CHSC78524  Phytolacca americana Lowell Ahart 2000-8-29 8669 Sutter On the north side of Pass Road, Sutter Buttes, about 1 1/2 miles northwest of Sutter. 51 Comment
  JEPS115644  Phytolacca americana Lowell Ahart 2009-8-13 16280 Butte West end of a picnic area, on the north side of the channel, about 140 yards east of the diversion structure that controls Mud Creek diversion and Lindo Channel, about 40 yards northwest of Big Chico Creek, Upper Bidwell Park, Chico 68 Comment
  JEPS95155  Phytolacca americana Lowell Ahart 1997-7-31 7758 Butte Durham, Durham Elementary School Durham Elementary School; Durham, Durham Elementary School 57 Comment
  UCSC009440  Picris echioides Lowell Ahart 1995-10-4 7677 Butte Peter Ahart Ranch, about 2 miles north and 1/4 mile east of Honcut, about 12 miles south of Oroville 37 Comment
  CHSC29996  Pilularia americana L. Ahart 1980-4-19 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CHSC45832  Pinus jeffreyi Lowell Ahart 1973-10-29 285 Nevada West of Washington Road, about 2 miles north of Highway 20. 914 Comment
  JEPS128645  Pinus jeffreyi Lowell Ahart, John Dittes 2017-7-19 21570 Nevada About 200 yards north of Carpenter Meadow, about 4.9 miles (air) west of Hobart Mills, about 6.1 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. Comment
  CHSC32019  Pinus monticola L. Ahart 1974-10-1 644 Plumas N of Pilot Peak on w part of Buzzards Roost Ridge, ca. 1 mi n of Onion Valley, ca. 10 mi n of La Porte. 1981 Comment
  CHSC10728  Pinus sabiniana Lowell Ahart 1969-7-12 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET10872491  Piperia elegans Lowell Ahart, Peter Ahart 1983-7-29 Ahart 4240 Butte T22N R6E sw sec 36. Ca. 0.5 mi e of Milsap Bar, ca. 25 mi ne of Oroville. Yellow Pine Forest; 500 m. 500 Comment
  CHSC96757  Piperia elongata Lowell Ahart 2007-5-29 13929 Butte On the east side of Bald Rock Dome, on the west side of the Dome Trail, trail leads to the Middle Fork of the Feather River, about 1 3/4 miles by the trail from the trail head which is 3/10 mile east of Bean Creek Road, about 2 miles (air) northeast of Big Bald Rock, about 16 miles (air) northeast of Oroville. 585 Comment
  JEPS124178  Plagiobothrys Lowell Ahart 2015-3-10 19944 Butte North of Larkin Road, about 6 miles (air) southwest of Oroville. Comment
  JEPS107356  Plagiobothrys austiniae Lowell Ahart, Paul Maslin, John Dittes 2005-3-17 11664 Butte Big Chico Creek Ecological Reserve. Burned area, ca. 50 yd S of fence, on the E side of the poor dirt road, ca. 1/8 mi NW of the Indian Cave, ca. 3/4 mi W of Big Chico Creek, ca. 4 1/2 mi (air) NE of Chico 481 Comment
  SEINET3449089  Plagiobothrys austiniae Lowell Ahart, John Dittes 2003-5-12 10139 Shasta Cottonwood, Cottonwood, about 12 air miles east/northeast, 2.8 air miles west/southwestof Darah Springs State Fish Hatchery, about 0.25 miles south of the Coleman Canal, about 350 yards south of the barn 260 Comment
  CHSC42413  Plagiobothrys canescens Lowell Ahart 1977-4-10 1283 Sutter On the south-west side of the South Butte, Sutter Buttes. 274 Comment
  JEPS114600  Plagiobothrys canescens Lowell Ahart, John Dittes, Josephine Guardino 2008-4-12 14668 Merced On dry soil, slopes of mounds, about 1/2 mile south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CHSC113622  Plagiobothrys cusickii Lowell Ahart 2014-8-31 19816 Plumas On the west side of Black Rock Creek, about 250 yards south of the foot bridge across Black Rock Creek, about 250 yards south of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. 1536 Comment
  CHSC115608  Plagiobothrys cusickii Lowell Ahart; John Dittes 2015-7-13 20305 Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107810  Plagiobothrys cusickii Lowell Ahart, John Dittes 2005-6-2 11954 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  JEPS117204  Plagiobothrys cusickii Lowell Ahart, John Dittes 2010-7-31 17014 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1510 Comment
  CHSC97662  Plagiobothrys fulvus Lowell Ahart 2007-5-12 13777 Yuba Along road to the power towers, about 100 yards north of the first power tower, about 150 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 35 Comment
  JEPS113117  Plagiobothrys fulvus Lowell Ahart, Brian Williams 2007-4-13 13636 Placer Open pasture fields, about 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln 43 Comment
  SBBG121292  Plagiobothrys fulvus L. Ahart, J. Dittes, J. Guardino 2007-4-3 13616 Tehama E bank of Brush Crk (a N branch), ca. 4 air mi NE of the intersection of Hwy 99 E and Vina Rd, ca. 7 mi (air) SE of Los Molinos 112 Comment
  CHSC104797  Plagiobothrys glyptocarpus var. glyptocarpus Lowell Ahart 2010-6-9 16785 Butte On damp to wet dark soil, bottom of a small drainage, open grassy pasture field, about 100 yards west of the fence, about 1/2 mile south of the improved parking area and Cherokee Road, North Table Mountain, about 5 1/2 miles (air) northeast of Oroville. 398 Comment
  CHSC96493  Plagiobothrys glyptocarpus var. glyptocarpus Lowell Ahart 2007-4-17 13682 Yuba Along a small wash, about 1/8 mile west of Marysville Road and the Parking Area, Daugherty Hill Wildlife Area, Donovan Hill Management Area, about 5 1/2 miles (air) northeast of Loma Rica. 292 Comment
  JEPS103363  Plagiobothrys greenei Lowell Ahart 2002-4-24 9526 Butte Vernal pools and swales, in a field, on the E side of Lone Tree Road, ca 1 1/8 miles N of Cox Lane, ca 3 miles (air) SW of Palermo, ca 7 miles (air) S of Oroville. 35 Comment
  JEPS113632  Plagiobothrys greenei Lowell Ahart 2007-5-12 13778 Yuba Bottom of a scraped area, about 30 feet east of a culvert, about 50 yards north of the second power tower, about 400 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 28 Comment
  RSA726775  Plagiobothrys greenei L. Ahart 2007-4-13 13637 Placer About 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln. 44 Comment
  CAS-BOT-BC230971  Plagiobothrys hispidulus Lowell Ahart 1985-7-11 5141 Plumas Little Grass Valley Reservoir, where Black Rock Creek flows into the lake, about 4 miles NW of La Porte 1584 Comment
  CHSC109674  Plagiobothrys hispidulus Lowell Ahart; John Dittes 2012-7-10 18321 Modoc Along the sides of a small deep drainage, northeast of the old homestead, Ash Creek State Wildlife Area, about 3.4 miles (air) west of Adin, about 8.2 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  CHSC112431  Plagiobothrys hispidulus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18776 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC113067  Plagiobothrys hispidulus Lowell Ahart; John Dittes 2013-7-22 18854 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC94108  Plagiobothrys hispidulus Lowell Ahart 2006-7-9 12926 Plumas Near a small seep, about 100 yards north of the paved basalt road, about 3 3/4 miles (air) northwest of Tamarack Flat, about 5 3/4 miles (air) northwest of Little Grass Valley Reservoir. 1678 Comment
  JEPS121220  Plagiobothrys hispidulus Lowell Ahart, John Dittes 2013-7-24 18921 Modoc N side of Ash Creek Floodplain, 0.54 air miles SE of Pilot Butte parking area, 1.1 air miles S of County Road 87, 6.8 air miles W of Adin, Big Valley. Comment
  JEPS121921  Plagiobothrys hispidulus Lowell Ahart 2014-7-10 19627 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CAS-BOT-BC230970  Plagiobothrys hispidulus Lowell Ahart 1985-7-3 5102 Plumas Little Grass Valley Reservoir, where the S Fork of the Feather River flows into the lake, about 4.25 miles NE of La Porte 1584 Comment
  CHSC118555  Plagiobothrys leptocladus Lowell Ahart; John Dittes, Josephine Guardino 2017-6-15 21403 Shasta Bottom of the seasonal swale passing northward into northeast end of Fall River Lake, 740 feet northwest from end of Mackey's Cove Road, about 0.6 mile northwest of airport runway, about 1.2 miles (air) north of Fall River Mills, Fall River Valley. 1008 Comment
  JEPS128713  Plagiobothrys leptocladus Lowell Ahart, John Dittes, Josephine Guardino 2017-6-15 21403 Shasta Northward into northeast end of Fall River Lake, 740 feet northwest from the end of Mackey's Cove Road, about about 0.6 mile northwest of airport runway, about 1.2 miles (air) north of Fall River Mills, Fall River Valley. Comment
  JEPS102650  Plagiobothrys mollis var. mollis Lowell Ahart 2001-8-28 9211 Plumas Strand of Lake Almanor, west of the intersection of the dirt road to Last Chance Marsh and the poor dirt road that goes south along Lake Almanor to the causeway of Highway 36, about 3/4 mile NE of Chester. 1371 Comment
  SBBG128739  Plagiobothrys nothofulvus L. Ahart 2012-5-2 17973 Butte 20 yards S of the fence, W of the Government Pole Line, Upper Bidwell Park, ca. 3/4 mi Eof Chico 85 Comment
  SEINET10497119  Plagiobothrys scouleri Lowell Ahart 1985-7-3 Ahart 5102 Plumas About 4 1/4 miles north-east of La Porte. Comment
  JEPS104013  Plagiobothrys shastensis Lowell Ahart 2003-5-9 10124 Butte North of the Larkin Rd Boat Ramp, on the n side of the access road to the boat ramp at the Thermalito Afterbay, ca 300 yd w of Larkin road, ca 1 1/4 mi south of the Oroville Airport, ca 5 mi (air) sw of Oroville. 38 Comment
  CHSC115366  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-24 20063 Butte Bottom and sides of a large duck field, 50 yards southeast of Parking Lot 1, about 1 1/4 miles north of Rutherford Road, Gray Lodge Wildlife Area, about 6 1/2 miles (air) southwest of Gridley. 19 Comment
  CHSC39507  Plagiobothrys stipitatus var. micranthus Lowell Ahart 1983-6-6 4034 a Butte On the bottom of a small vernal pool, Peter Ahart Ranch, about 2 miles north and 1/4 mile east of Honcut. 50 Comment
  CHSC87317  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2004-4-29 10798 Tehama On the east side of Dead Rabbit Lake, east of the Nomalaki Trail, about 3/4 mile northwest of Bowers Creek, about 1 1/2 miles northwest of Forest Road 23N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta. 571 Comment
  JEPS107340  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2005-4-2 11682 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico 25 Comment
  JEPS117192  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2010-6-20 16832 Butte Large vernal pool, about 1/4 mile north of Cox Lane, about 1 1/2 miles east of Palermo Honcut Highway, Guidci Ranch, about 7 1/2 miles (air) southeast of Oroville 59 Comment
  RSA325166  Plagiobothrys stipitatus var. micranthus L. Ahart 1984-4-19 4546 Sutter Along West Butte Road, ca. 1.8 mile N of Sacramento Outing Club, Sutter Buttes, west of Marysville. 35 Comment
  SBBG128017  Plagiobothrys stipitatus var. micranthus L. Ahart 2010-5-14 16653 Butte W side of the old Humboldt Rd, Disc Golf Area, ca. 150 yards N of the entrance to the Disc Golf Area, ca. 40 yards W of Hwy 32, upper Bidwell Park, ca. 5 mi (air) NE of Chico 395 Comment
  CHSC80518  Planodes virginica Lowell Ahart 2001-4-27 8733 Butte Just northwest of the bridge across Wyandotte Creek, north of Lower Honcut Road, about 125 yards west of the Railroad, about 1 1/4 mile east of Highway 70, about 1 3/4 miles west of Honcut, about 14 miles (air) south of Oroville. 26 Comment
  CHSC103945  Plantago coronopus Lowell Ahart 2010-5-22 16713 Butte About 140 yards east of the fence, about 240 yards east of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 392 Comment
  JEPS119791  Plantago elongata Lowell Ahart 2012-5-4 17995 Butte About 1 1/4 miles northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. Comment
  UCSC008273  Plantago elongata Lowell Ahart 2007-5-12 13802 Yuba About 400 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 28 Comment
  JEPS115594  Plantago erecta Lowell Ahart 2009-4-22 15584 Butte West side of Guardians Trail, about 100 yards north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 381 Comment
  CDA6623  Plantago lanceolata L. Ahart, J. Dittes 2003-6-11 10249 Tehama On the west side of Battle Creek, about 1 mile north of Manton Road, about 1 1/2 miles (air) northeast of the Colman Power House, about 5 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 10 miles (air) east-northeast of Cottonwood. Comment
  CHSC40641  Plantago lanceolata Lowell Ahart 1985-10-19 5221 Sutter About 50 yards west of the Dean Cabin, Dean Ranch, Sutter Buttes. 274 Comment
  CHSC94585  Plantago lanceolata Lowell Ahart 2006-9-13 13321 Butte South edge of the North Fork of the Feather River, about 50 yards west of the Cresta Power House, north side of Highway 70, about 2 3/4 miles northeast of Pulga, about 23 miles (air) northeast of Oroville. 437 Comment
  CDA42917  Plantago major L. Ahart 2012-7-28 18412 Nevada On the west side of Pioneer Trail, about 40 yards east of the P. G. & E. Pavilion and restrooms, on the east side of Bowman Lake Road, about 20 yards south of the Bear River, Bear Valley. Comment
  CHSC116306  Plantago major Lowell Ahart 2015-11-18 20663 Butte On the west side of the Feather River, about 1/2 mile south of Palm Avenue, about 1 1/2 miles southeast of the intersection of Palm Avenue and Larkin Road, about 5 miles (air) northeast of Gridley. 26 Comment
  CHSC31780  Plantago major L. Ahart 1978-8-30 1801 Butte Peter Ahart Ranch, Honcut. Along the edge of North Honcut Creek. 50 Comment
  CHSC65171  Plantago major Lowell Ahart 1995-8-19 7610 Butte East side of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 2 3/4 miles east of Honcut, about 12 miles south-east of Oroville. 36 Comment
  JEPS119674  Plantago major Lowell Ahart, John Dittes 2012-7-12 18358 Modoc About 1/8 mile east of the parking area on the east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC10701  Plectritis ciliosa Lowell Ahart 1968-4-1 Butte Peter Ahart Ranch, Honcut. Comment
  JEPS117148  Plectritis macrocera Lowell Ahart 2010-4-30 16596 Butte Below rim and above cliffs, north side of disk golf area, on a ridge about 250 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico 360 Comment
  CHSC117555  Pleuricospora fimbriolata Lowell Ahart 2016-7-9 21097 Plumas South of a small meadow, south of the dirt road, about 1/2 mile southeast of Table Mountain, about 1 1/2 miles (air) northwest of Tamarack Flat, about 3 1/2 miles (air) northwest of Little Grass Valley Reservoir Dam. 1759 Comment
  CHSC11088  Poa annua Lowell Ahart 1969-3-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC255687  Poa bolanderi Lowell Ahart 1985-7-16 5147 Butte Near Willow Creek, about 4 miles E of Cherry Hill, about 7 miles NE of Butte Meadows 1828 Comment
  JEPS124426  Poa bolanderi Lowell Ahart, John Dittes 2015-8-5 20475 Tehama East side of Childs Meadow, 150 yards west of Highway 36, 0.69 air-miles northwest of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.2 air-miles east of Doe Mountain, 9.77 air-miles south of Lassen Peak. Comment
  CHSC98823  Poa bulbosa Lowell Ahart; John Dittes, Josephine Guardino 2008-4-12 14681 Merced Grassy area on the south side of Dutchman Slough, about 100 yards east of the west fence, about 1/8 mile northwest of the windmill and corral, about 1/2 mile southwest of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. 53 Comment
  JEPS124236  Poa bulbosa Lowell Ahart 2015-4-1 19991 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  CHSC113928  Poa compressa Lowell Ahart 2014-8-20 19714 Plumas Around rocks, high edge of Lake Almanor, about 200 yards north of the causeway across Lake Almanor, about 1-1/4 miles east of Chester. 1386 Comment
  SEINET10921189  Poa compressa Lowell Ahart 1988-6-29 Ahart 6090 Butte East of Galen Ridge Road, about 1/2 mile east of the Oroville Quincy Highway, north of Lake Madrone, Butte County, California. Common. Yellow Pine Forest. 622 Comment
  RSA701083  Poa cusickii subsp. epilis L. Ahart 2004-8-9 11359 Nevada North of the mine waste mound, south of a small dry meadow, southwest of a large snow lake, on the very upper reaches of Jackson Creek, on the northeast side of English Mountain., About 3/4 mile (air) south of Catfish Lake, about 2 3/4 miles east of the east end of Bowerman Lake. 2291 Comment
  JEPS114849  Poa pratensis subsp. pratensis Lowell Ahart, John Dittes 2008-6-22 15020 Lassen On the road sides of the levee, about 100 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber 1260 Comment
  CAS-BOT-BC242984  Poa secunda subsp. secunda Lowell Ahart 1979-7-18 s.n. Plumas Onion Valley, 1 mile W of Pilot Peak, along road just before it crosses Onion Valley Creek 1800 Comment
  CHSC31699  Poa secunda subsp. secunda L. Ahart 1970-3-18 35 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC44585  Poa secunda subsp. secunda Lowell Ahart 1977-8-2 1511 Sierra Near the road to the north side of Mount Fillmore, about 12 miles north-east of La Porte. 1828 Comment
  UC1562449  Poa secunda subsp. secunda Lowell Ahart 1990-4-28 6471 Butte ca 3 1/2 mi sw Oroville (s side of Pacific Heights Rd) 39 Comment
  CHSC101687  Polycarpon tetraphyllum Lowell Ahart 2009-5-8 15657 Butte On the south side of the gravel road, about 10 yards east of Cedar Grove Parking Area in Lower Bidwell Park, Chico. 67 Comment
  CHSC109070  Polycarpon tetraphyllum var. tetraphyllum Lowell Ahart; Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17911 Butte On the south side of the path, near Table 14, on the north side of Centennial Avenue, Lower Bidwell Park, Chico. 80 Comment
  CDA35225  Polygala cornuta var. cornuta L. Ahart 2004-7-17 11285 Nevada Very upper reaches of Steephollow Creek, about 100 yards west of of Highway 20, about 150 yards south of the intersection of Highway 20 and Lowell Hill Road, about 2 miles northwest of Bear Valley, about 3 miles southeast of the Omega Rest Area, about 16 miles (air) northeast of Nevada City. Comment
  JEPS117454  Polygonum arenastrum Lowell Ahart 2010-9-15 17167 Sierra Open areas, about 5 yards west of the cabin, at the spring, about 2 3/4 miles (air) north of Yuba Pass on Highway 49, about 4 miles (air) east of Haskell Peak 2134 Comment
  CHSC115538  Polygonum aviculare Lowell Ahart; John Dittes 2015-8-5 20479 Tehama On dry distributed bare soil, poor logging road, east side of Child Meadow, 15 yards west of Highway 36, 0.69 air-miles northwest of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.2 air-miles east of Doe Mt., 9.77 air-miles south of Lassen Peak. 1498 Comment
  CHSC83052  Polygonum aviculare Lowell Ahart 2002-10-17 9991 Butte On the hills below the high water line of Lake Oroville, about 1 1/2 miles south of Highway 162 (Oroville Quincy Highway), about 3 miles (air) northeast of Oroville Dam. 227 Comment
  CHSC113210  Polygonum aviculare subsp. depressum Lowell Ahart 2014-4-25 19407 Butte Sides of a cleaned ditch, on the west side of Richvale South Highway, south of the intersection of Richvale South Road and Richvale South Highway, Richvale. 30 Comment
  JEPS120904  Polygonum aviculare subsp. depressum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18735 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC103695  Polygonum bidwelliae Lowell Ahart 2010-5-14 16642 Butte On the bottom of the old Humboldt Road, Disc Golf Area, about 150 yards north of the entrance to the Disc Golf Area, about 40 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 395 Comment
  JEPS117135  Polygonum bidwelliae Lowell Ahart 2010-5-7 16622 Butte On the south side of a trail, west of disk golf area, on a ridge about 350 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico 353 Comment
  JEPS117353  Polygonum bidwelliae Lowell Ahart, John Dittes 2010-7-17 16865 Tehama On dry thin volcanic soil, south aspect on the north side of ''Initial Gulch'', about 1000 feet south of pond, about 4.8 miles (air) southeast of Manton, about 2 miles (air) north of Highway 36 768 Comment
  JEPS117688  Polygonum bolanderi Lowell Ahart, John Dittes 2010-7-17 16868 Tehama On dry bare rocky soil, south of the fence, about 130 yards southeast of the pond, south of the Soap Creek Ranch, about 4.8 miles (air) southeast of Manton, about 2 miles (air) north of Highway 36 819 Comment
  CHSC66903  Polygonum californicum Lowell Ahart 1996-11-11 7709 Butte In an open area in blue oaks, pasture field, about 1/2 mile west of the intersection of Avacado Avenue and Oroville Bangor Highway, about 1 mile northwest of Bangor. 213 Comment
  CHSC117625  Polygonum douglasii Lowell Ahart 2016-8-30 21328 Plumas On the west side of the meadow, south of the pond, about 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, about 1 1/2 miles (air) southeast of Pilot Peak. 2044 Comment
  JEPS119826  Polygonum douglasii Lowell Ahart 2012-7-28 18383 Nevada On the east side of Pioneer Trail, about 70 yards southeast of the P. G. & E Pavilion and restrooms, on the east side of Bowman Lake Road, about 90 yards south of the Bear River, Bear Valley. Comment
  CAS-BOT-BC414582  Polygonum douglasii Lowell Ahart 1983-10-27 4478 Sierra Near a dirt road that is about 2 miles south-east of Jackson Meadows Res., about 1 mile south of Pass Creek, near Jackson Meadows Res. 2200 Comment
  CDA34544  Polygonum douglasii subsp. douglasii L. Ahart 2007-6-16 14091 Plumas East of the small stream, on the south side of of County Road 111 (Beckwourth Gensee Road), 50 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. Comment
  CHSC92182  Polygonum douglasii subsp. douglasii Lowell Ahart; John Dittes 2005-9-19 12403 Plumas Along the sides of a good dirt road, about 1 1/4 miles east of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake. 1989 Comment
  CHSC96923  Polygonum douglasii subsp. johnstonii Lowell Ahart; John Dittes, Josephine Guardino 2007-6-8 13989 Plumas East side of an open rocky flat, 50 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1965 Comment
  CHSC94546  Polygonum douglasii subsp. spergulariiforme Lowell Ahart 2006-9-9 13265 Tehama On dry bare rocky soil, dry open flat, about 30 yards east of Colby Creek, about 120 yards west of the dirt road, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows. 1525 Comment
  SEINET10838763  Polygonum hydropiper Lowell Ahart 1985-10-19 Ahart 5210 Sutter Dean Ranch, Sutter Buttes. About 12 miles west of Marysville. Comment
  JEPS114551  Polygonum hydropiperoides Lowell Ahart, John Dittes 2008-8-21 15245 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CHSC102529  Polygonum lapathifolium Lowell Ahart 2009-10-27 16491 Napa Below the high water line of Lake Berryessa, about 50 yards southeast of Eticuera Creek, about 150 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of Winters. 130 Comment
  HSC100820  Polygonum lapathifolium Lowell Ahart 2011-8-17 17628 Butte ~10 yd. N of the trail, N of the crossing and on the E side of Big Chico Creek, ~50 yd. W of Ten Mile House Rd., Upper Bidwell Park, 3/4 (air) mi. W of Hwy. 32, 10 mi. NE of Chico. 204 Comment
  CHSC108468  Polygonum minimum Lowell Ahart 2011-9-17 17670 Plumas About 100 yards south of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 80 yards south of the paved road, about 1/8 miles west of Little Grass Valley Reservoir. 1645 Comment
  CHSC117579  Polygonum minimum Lowell Ahart; John Dittes, Josephine Guardino 2016-9-21 21363 Tehama Dry area on the west side of Highway 89, about 50 yards south of Bluff Falls, about 1 mile south of Lassen Volcanic National Park, about 2 1/2 miles (air) north of Morgan Mountain. 1963 Comment
  JEPS118391  Polygonum minimum Lowell Ahart 2011-9-17 17670 Plumas About 100 yards south of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 80 yards south of the paved road, about 1/8 miles west of Little Grass Valley Reservoir 1645 Comment
  CHSC45470  Polygonum parryi Lowell Ahart 1980-8-12 2541 Yuba Growing on a large gravel bar that is formed from a debris dam across Slate Creek, a little below where Gold Run Creek flows into Slate Creek, above Onion Creek, about 7 miles south of La Porte. 1158 Comment
  SEINET10479663  Polygonum parryi Lowell Ahart 1985-6-17 Ahart 5060 Butte Lumpkin Ridge, 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls. Comment
  CDA32121  Polygonum persicaria L. Ahart, John Dittes 2008-8-21 15244 Merced On the bottom of Dutchman Slough, about 220 yards south of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. Comment
  CHSC97575  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes 2007-6-17 14203 Plumas Gravel bar along Red Clover Creek, about 30 yards east of County Road 111 (Beckwourth Genesee Road), about 1/4 mile east of Bridge across Red Clover Creek, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1654 Comment
  CAS-BOT-BC71871  Polypodium californicum Lowell Ahart 1990-3-19 6419 Butte south side of Pacific Heights Road, about 3 1/2 miles southwest of Oroville 36 Comment
  CHSC46173  Polypodium calirhiza Lowell Ahart 1974-3-18 327 Butte Near North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  JEPS94825  Polypogon australis Lowell Ahart 1998-6-9 7988 Butte about 7 air mi n of Oroville (sw of the ione oak tree, nw of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain, Cherokee Road 403 Comment
  RSA755345  Polypogon australis L. Ahart 2009-7-9 16012 Butte East side of Ten Mile House Road, Upper Bidwell Park, about 3/4 air miles west of Highway 32, about 10 miles northeast of Chico. 210 Comment
  CHSC36518  Polypogon interruptus L. Ahart 1982-5-28 3442 Butte E of North Honcut Creek, near the Peter Ahart Ranch, ca. 1.5 mi n and 3 mi e of Honcut. 50 Comment
  SEINET3015523  Polypogon interruptus L. Ahart 1997-8-7 7827 Yuba On the W side of the dirt road, near an unnamed stream, Peterson Ridge Rd, about 3 mi (air) SE of Challenge. 762 Comment
  CHSC112799  Polypogon monspeliensis Lowell Ahart; John Dittes 2013-7-22 18874 Lassen Drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107817  Polypogon monspeliensis Lowell Ahart, John Dittes 2005-6-2 11967 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  JEPS110210  Polypogon monspeliensis Lowell Ahart 2006-6-15 12771 Glenn On the west side of the creek, about 30 yards south of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford 595 Comment
  SEINET10507587  Polypogon monspeliensis Lowell Ahart 1983-8-4 Ahart 4262 Sutter T16N R1E se sec 26. West side of South Butte, Sutter Buttes. Valley Grassland; 60 m. 60 Comment
  CHSC101751  Polystichum californicum Lowell Ahart 2009-5-23 15741 Butte On the east bank of Big Chico Creek, on the west side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highwat 32, about 10 miles northeast of Chico. 234 Comment
  CHSC10673  Polystichum imbricans Lowell Ahart 1966-3-13 Butte Near Enterprise. 182 Comment
  CHSC63692  Polystichum imbricans Lowell Ahart 1994-10-9 7560 Butte On the north side of the poor road that goes from Milsap Bar to Mountain Spring House, about 1 mile west of Mountain Spring House and the paved road, about 8 1/2 (air) miles north and 1 1/2 miles east of Feather Falls. 1158 Comment
  JEPS122334  Polystichum imbricans subsp. curtum Lowell Ahart 2014-8-24 19723 Butte On the south side of the road, about 150 yards southwest of the Forbestown Reservoir Dam, about 4 miles (air) northeast of Forbestown. Comment
  CHSC102121  Polystichum imbricans subsp. imbricans Lowell Ahart; John Dittes 2009-7-27 16164 Plumas On dry soil, on and around large rocks, about 50 yards southeast of a small dam, headwaters of Grizzly Gulch, 2.1 miles (air) northeast of Butt Valley Reservoir Dam. 1479 Comment
  CHSC61624  Polystichum imbricans subsp. imbricans Lowell Ahart 1993-9-13 7240 Butte On the south side of the dirt road, road is on the south side of Bolt Creek, about 1 mile south-east of Butte Meadows. 1325 Comment
  JEPS127252  Polystichum imbricans subsp. imbricans Lowell Ahart, John Dittes, Josephine Guardino 2016-2-11 20698 -A Tehama On the north side of Deer Creek Trail, between the fish ladder and Big Leaf Pond, about 1 3/4 miles by trail to Highway 32. Comment
  RSA754533  Polystichum imbricans subsp. imbricans L. Ahart, John Dittes 2009-7-27 16164 Plumas Headwaters of Grizzly Gulch, 2.1 air miles NE of Butt Valley Reservoir Dam. 1480 Comment
  JEPS104166  Polystichum kruckebergii Lowell Ahart 2003-10-17 10646 Plumas Cliffs ne of Humboldt Peak, ca 3/4 mi e of Humboldt Summit, ca 8 mi (air) ne of Butte Meadows. 2103 Comment
  CHSC84996  Polystichum scopulinum Lowell Ahart 2003-10-17 10654 Plumas Cliffs north of Humboldt Peak, on the south side of the Pacific Crest Trail, about 1/2 mile east of Humboldt Summit, about 8 miles (air) northeast of Butte Meadows. 2042 Comment
  CHSC112650  Potamogeton Lowell Ahart 2013-10-16 19115 Butte Thermalito Afterbay, about 20 feet north of the base of the large rock levee, about 100 yards north of Larkin Road, about 4 miles (air) north of East Biggs. 49 Comment
  JEPS120719  Potamogeton Lowell Ahart 2013-10-16 19115 Butte Thermalito Afterbay, about 20 feet north of the base of the large rock levee, about 100 yards north of Larkin Road, about 4 air miles north of East Biggs. Comment
  CAS-BOT-BC452109  Potamogeton crispus Lowell Ahart 1987-9-4 5873 Butte Along the Biggs Princeton Highway, under P. G. & E. power lines, about 1 mile west of Biggs 28 Comment
  UCD138269  Potamogeton diversifolius L. Ahart 1982-6-19 3608 Sutter ca. 1/2 mile south of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  RSA754867  Potamogeton natans Lowell Ahart, Josephine Guardino 2009-9-6 16361 Tehama On the E side of Gurnsey Creek, meadow about 3/4 mile SW of the intersection of Highway 36 and Paynes Creek Road, about 6.5 air miles SE of Mineral. 1479 Comment
  CHSC92196  Potamogeton richardsonii Lowell Ahart; John Dittes 2005-9-19 12376 Plumas In deep water, on the south side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake. 2080 Comment
  CHSC32133  Potentilla glandulosa L. Ahart 1977-5-22 1391 Butte On banks of North Honcut Creek, Peter Ahart Ranch, Honcut. 50 Comment
  CHSC92194  Potentilla glandulosa subsp. ashlandica Lowell Ahart; John Dittes 2005-9-20 12458 Plumas On the south side of Forest Road 27N34, about 1 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 1984 Comment
  CHSC90472  Potentilla glandulosa subsp. glandulosa Lowell Ahart; Paul Maslin, John Dittes 2005-3-17 11624 Butte Big Chico Creek Ecological Reserve. On the cliff edge of the floor of the Indian Cave, about 100 yards north of the very poor dirt road, about 1/2 mile west of Big Chico Creek, about 4 1/2 miles (air) northeast of Chico. 430 Comment
  CHSC69050  Potentilla gracilis var. fastigiata Lowell Ahart 1997-8-3 7773 Butte On the east side of Little Kimshew Creek, where the basalt is eight sided, Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 Comment
  JEPS102840  Potentilla rivalis Lowell Ahart 2001-7-27 9049 Nevada Strand of Prosser Creek Reservoir, south of Commemorative Emigrant Trail, about 1/4 mile east of Highway 89, about 4 miles (air) north of Truckee. 1746 Comment
  CAS-BOT-BC47623  Primula suffrutescens Lowell Ahart 1976-10-11 s.n. Sierra On the north side of Mt. Fillmore 2286 Comment
  CHSC113484  Prunella vulgaris var. lanceolata Lowell Ahart 2014-7-13 19665 Butte West part of a large wet meadow (some bog), about 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1638 Comment
  CHSC39512  Prunella vulgaris var. lanceolata Lowell Ahart 1983-6-21 4067 Butte Along Bloomer Hill Road. Near a Branch of Canyon Creek, about 1/2 mile west of the Oroville Quincy Highway, about 15 miles north-east of Oroville. Section 5. 40 Comment
  CHSC44400  Prunella vulgaris var. lanceolata Lowell Ahart 1988-6-23 6062 Butte In small meadow, north of Forbestown Road, about 1/12 mile east of the intersection of Black Bart Road and Forbestown Road, about 1 mile west of Robinson Mill Road. 670 Comment
  CHSC109174  Prunus cerasifera Lowell Ahart; Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-10 18011 Butte 20 yards north of Big Chico Creek, soouth of the path, south of the paved park road,south of the old walnut orchard, south of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  CAS-BOT-BC154609  Prunus subcordata Lowell Ahart 1990-3-19 6420 Butte On the south side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville 33 Comment
  CHSC44886  Pseudobahia heermannii Lowell Ahart 1979-4-15 1078 Butte Along the north side of Swedes Flat Road, near the bridge across Rocky Honcut Creek, about 6 miles north of Bangor. 457 Comment
  CHSC116154  Pseudognaphalium beneolens Lowell Ahart 2015-11-7 20624 Butte On the east side of the old highway Alternate 40, about 1/8 mile south of the end of Alternate 40, Dark Canyon, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. 240 Comment
  CHSC40480  Pseudognaphalium californicum Lowell Ahart 1985-5-20 5018 Sutter On the south slopes below the lower radio tower, on the south side of the South Butte, Sutter Buttes. 594 Comment
  CHSC47655  Pseudognaphalium californicum Lowell Ahart 1980-6-21 2427 Sutter Just a little south of the old homestead, on the south side of the South Butte, Sutter Buttes. 304 Comment
  CAS-BOT-BC357000  Pseudognaphalium luteoalbum Lowell Ahart 1986-11-9 5455 Butte About 1/10 mile south of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miles south-west of Oroville 36 Comment
  CHSC81760  Pseudognaphalium stramineum Lowell Ahart 2001-10-10 9341 Placer French Meadows Reservoir, near the boat of trail access area on the northwest side of the reservoir, about 1 mile southwest of the bridge across the Middle Fork of the American River, about 2 miles southwest of Ahart Camp, about 22 miles (air) northeast of Forest Hill. 1594 Comment
  CHSC46923  Pseudognaphalium thermale Lowell Ahart 1980-7-29 2493 Butte Along the edge of Swedes Flat Road, about 1 1/2 miles east of the Bangor Oroville, Highway, near Bangor. 304 Comment
  CHSC89427  Pseudognaphalium thermale Lowell Ahart 2004-9-29 11409 Nevada Along Forest Road 41, about 1 northwest of Weaver Lake, about 2 miles (air) northwest of Bowman Lake, about 4 miles (air) northeast of Graniteville. 1882 Comment
  CHSC84428  Pseudostellaria jamesiana Lowell Ahart; John Dittes, Josephine Dittes 2003-8-23 10536 Tehama Along a small streamlet, on both sides of the trail, about 1/4 mile from the campsite as one hikes to Square Lake, about 1 mile northeast of Mount Linn, South Yolla Bolly. 2118 Comment
  CHSC101926  Pseudotsuga menziesii var. menziesii Lowell Ahart; John Dittes 2009-7-13 16058 Plumas East side of Forest Service Road 27lN98, headwater of Clear Creek, about 2.0 miles (air) north of Butt Valley Reservoir Dam, about 3 miles (air) southwest of Lake Almanor Reservoir Dam. 1476 Comment
  JEPS117188  Psilocarphus brevissimus var. brevissimus Lowell Ahart 2010-5-14 16649 Butte On the west side of the old Humboldt Road, Disc Golf Area, about 150 yards west of the entrance to the Disc Golf Area, about 40 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico 395 Comment
  CHSC80514  Psilocarphus oregonus Lowell Ahart 2001-4-27 8734 Butte Just northwest of the bridge across Wyandotte Creek, northof Lower Honcut Road, about 125 yards west of the Railroad, about 1 1/4 mile east of Highway 70, about 1 3/4 miles west of Honcut, about 14 miles (air) south of Oroville. 26 Comment
  CAS-BOT-BC361907  Psilocarphus tenellus Lowell Ahart 1983-5-14 4000 Sutter Along West Butte Road, about 1/8 mile north of the Sacramento Outing Club, Sutter Buttes 35 Comment
  CHSC97471  Psilocarphus tenellus var. tenellus Lowell Ahart; John Dittes 2007-6-16 14085 Plumas Graded road gutter, east of the small stream, on the south side of County Road 111 (Beckwourth Genesee Road), 50 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1647 Comment
  CHSC105928  Ptelea crenulata Lowell Ahart 2010-7-17 16881 Tehama On the south side of Soap Creek, on the north side of Pondrosa Way, about 4.5 miles (air) southeast of Manton, about 2-1/2 miles (air) north of Highway 36. 772 Comment
  CHSC108977  Ptelea crenulata Lowell Ahart 2012-4-30 17931 Butte On both sides of South Rim Trail, about 1/2 mile southwest of the old homestead, pond, and Ten Mile House Road, about 3/4 mile west of Highway 32, about 8 miles northeast of Chico, south part of Upper Bidwell Park. 256 Comment
  RSA767837  Ptelea crenulata L. Ahart, John Dittes 2010-7-17 16881 Tehama North-aspect on south side of Soap Creek, on the north side of Ponderosa Way, about 4.5 air miles southeast of Manton, about 2.5 air miles north of Highway 36. 773 Comment
  CHSC65378  Pterospora andromedea Lowell Ahart 1995-9-13 7632 Plumas In the forest on the north side of Onion Valley, east of Quincy-La Porte Road, about 1 mile north-west of Pilot Peak. 1828 Comment
  CHSC88142  Pterospora andromedea Lowell Ahart 2004-7-17 11254 Nevada Near a small stream, very upper reaches of Steephollow Creek, about 100 yards west of Highway 20, about 150 yards south of the intersection of Highway 20 and Lowell Hill Road, about 2 miles northwest of Bear Valley, about 3 miles southeast of the Omega Rest Area, about 16 miles (air) northeast of Nevada City. 1463 Comment
  CHSC94548  Pterospora andromedea Lowell Ahart 2006-9-9 13259 Tehama Near the dry meadow area just west of the dirt road , about 150 yards east of Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows. 1525 Comment
  JEPS117492  Pterospora andromedea Lowell Ahart, John Dittes 2010-7-31 17007 Lassen On the sout side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  SEINET10479689  Pterostegia drymarioides Lowell Ahart 1985-5-5 Ahart 4897 Sutter East of the road, about 2 miles south-east of the Dean Cabin, about 2 miles north of Sutter, Sutter Buttes. 100 Comment
  RSA715803  Puccinellia distans L. Ahart 2005-6-9 12002 Siskiyou About 3/5 mile (air) south of Highway 99/97 Cutoff, about 2 1/2 miles (air) east-southeast of Grenada. 775 Comment
  CHSC115565  Puccinellia lemmonii Lowell Ahart; John Dittes 2015-7-15 20345 Modoc On the east side of Elkins Lane, about 100 yards northeast of the Parking Area, northwest of the old barn, Ash Creek State Wildlife Area, about 3.9 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1266 Comment
  JEPS120925  Puccinellia lemmonii Lowell Ahart, John Dittes, Todd Sloat 2013-6-9 18788 Lassen In a depression on the S side of the road, on the S side of the McArthur Diversion Canal, 0.32 miles E of the Tule River, 2.8 air miles NW of McArthur, Fall River Valley, McArthur Swamp. Comment
  CDA34560  Pyracantha koidzumii L. Ahart, John Dittes, Josephine Guardino 2008-11-8 15422 Butte South of the trail on the south side of Cedar Grove, Lower Bidwell Park, Chico. Comment
  HSC100792  Pyrrocoma lanceolata var. lanceolata Lowell Ahart, John Dittes 2010-7-30 16969 Siskiyou Shasta Springs Ranch, 2.6 (air) mi. NW of Big Springs Lake, 3.9 (air) mi. SE of Grenada, 6.3 (air) mi. NW of Dwinnel Dam. 779 Comment
  CHSC97778  Quercus berberidifolia Lowell Ahart 2007-11-3 14551 Butte West of the high water line of Lake Oroville, about 1/2 mile east of the Power House below Kunckle Reservoir, about one mile north of the Lime Saddle Campground, about 5 miles (air) southeast of Paradise. 322 Comment
  CHSC109601  Quercus coccinea Lowell Ahart; Susan Bazell, Josephine Guardino 2012-5-31 18120 Butte On the north side of the paved park road (Peterson Drive) about 600 yards west of the gate, northeast of the parking area, Lower Bidwell Park Chico. 76 Comment
  JEPS95964  Quercus kelloggii Lowell Ahart 1999-6-12 8084 Butte North Table Mountain; about one mile (air) northwest of the entrance gates along the west side of Cherokee Road; about 7 miles (air) north of Oroville 365 Comment
  CHSC99502  Ranunculus aquatilis var. diffusus Lowell Ahart; John Dittes 2008-6-20 14974 Lassen On bottom of a vernal pool, mountain meadow, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS124355  Ranunculus aquatilis var. diffusus Lowell Ahart, John Dittes 2015-7-16 20376 Modoc Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC11045  Ranunculus aquatilis var. subrigidus Lowell Ahart 1967-7-27 Sierra Near Webber Lake. 2133 Comment
  CHSC117213  Ranunculus arvensis Lowell Ahart; John Dittes 2016-6-7 21003 Lassen Near Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS116083  Ranunculus hebecarpus Lowell Ahart 2009-4-22 15592 Butte Along the Guardians Trail, about 100 yards north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 381 Comment
  CHSC108009  Ranunculus macounii Lowell Ahart; John Dittes 2011-6-21 17536 Lassen 335 feet northwest of Big Valley Canal, 2.1 miles (air) south of County Road 87, 6.6 miles (air) northeast of Bieber, 7.9 miles (air) west by southwest of Adin, Big Valley. 1264 Comment
  CHSC63161  Ranunculus occidentalis Lowell Ahart 1994-6-27 7373 Yuba In about the center of Schwartz Meadow, on the east side of La Porte Road, about 4 miles north-east of Strawberry Valley. 1219 Comment
  CHSC11353  Ranunculus occidentalis var. occidentalis Lowell Ahart 1967-3-30 Butte Peter Ahart Ranch, Honcut. 45 Comment
  RSA0111937  Ranunculus pusillus Lowell A. Ahart 2015-5-5 20139 Butte About 30 yards north of Larkin Road, about 400 yards south of Larkin Road Boat Launch Area, near the Thermalito Afterbay, about 1 mile southwest of the Oroville Airport, about 6 miles (air) southwest of Oroville. 43 Comment
  CHSC31824  Rhamnus tomentella subsp. tomentella L. Ahart 1975-6-5 782 Butte Peter Ahart Ranch, Honcut. Along North Honcut Creek on moist to dry loamy soil. 45 Comment
  CHSC46508  Rhamnus tomentella subsp. tomentella Lowell Ahart 1981-7-3 2894 Sutter Sutter Buttes, south side of the South Butte, on the side of a small wash, east of the old gas well. 91 Comment
  CHSC82376  Rhamnus tomentella subsp. tomentella Lowell Ahart 2002-6-2 9676 Butte West of a small open dry meadow, southwest of the intersection of Black Bart Road and Forbestown Road, about 3 miles (air) southwest of Forbestown. 670 Comment
  HSC100784  Rhamnus tomentella subsp. tomentella Lowell Ahart 2009-5-23 15724 Butte S side of Ten Mile House Rd., Upper Bidwell Park, 1/2 (air) mi. SW of the intersection of Hwy. 32 and Ten Mile House Rd., 10 (air) mi. NE of Chico. 311 Comment
  RSA703147  Rhodiola integrifolia subsp. integrifolia L. Ahart 2004-8-17 11393 Nevada About 100 yards S of the mine waste mound, on the E side of the very upper reaches of Jackson Creek, on the NE side of English Mountain, about 0.75 mile (air) S of Catfish Lake, about 2.75 miles (air) E of the east end of Bowman Lake. 2125 Comment
  CHSC103705  Rhus aromatica Lowell Ahart 2010-5-14 16674 Butte On the south side of the Guardian Trail, about 1/4 mile west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 301 Comment
  UC1609009  Rhus trilobata Lowell Ahart 1993-8-4 6929 Butte 2.5 mi s Oroville Airport (e side of gravel road, e of Feather River); Oroville Wildlife Area 30 Comment
  SEINET10973029  Rhus trilobata var. malacophylla Lowell Ahart 1983-4-10 Ahart 3927 Butte S of a large wash, 1/10 mi e of the large barn, ca. 1.4 mi ne of Hwy 99 and Pentz Rd jct, ca. 16 mi s of Chico. Valley Grassland; 65 m. 65 Comment
  CHSC78318  Rhynchospora capitellata Lowell Ahart 2000-6-27 8532 Butte Seeps on bare granite, on the north side of Bean Creek Road, about 1/4 mile southeast of Little Bald Rock, about 4 miles (air) northeast of Madrone Lake, about 13 miles (air) northeast of Oroville. 1066 Comment
  JEPS98612  Rhynchospora capitellata Lowell Ahart 2000-6-27 8532 Butte Seeps on bare granite, on the north side of Bean Creek Road, about 1/4 mile southeast of Little Bald Rock, about 4 miles (air) northeast of Madrone Lake, about 13 miles (air) northeast of Oroville. 1066 Comment
  CHSC10772  Ribes californicum Lowell Ahart 1969-5-18 Plumas Slate Creek, 10 miles south of La Porte. 914 Comment
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Jul 22 2018
  JEPS114512  Ribes nevadense Lowell Ahart 2008-6-5 14811 Plumas Steep west bank of the South Fork of the Feather River, about 1/8 mile southwest of the Feather Fork Mine, about 1 1/4 miles northeast of the Little Grass Valley Reservoir 1645 Comment
  JEPS119714  Ribes roezlii var. roezlii Lowell Ahart 2012-4-30 17922 Butte On the southwest side of Ten Mile House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico, south part of Upper Bidwell Park. Comment
  CAS-BOT-BC168780  Ribes viscosissimum Lowell Ahart 1989-7-2 6355 Plumas North of where the dirt road forks, the south fork leads to the Lookout on Pilot Peak, about 1/4 mile north of Pilot Peak, about 10 miles north-east of La Porte 2103 Comment
  CDA25589  Ribes viscosissimum var. hallii L. Ahart 2001-6-4 8753 Plumas About 1/8 mile north of the Feather Fork Mine, about 2 miles northeast of Little Grass Valley Reservoir, about 6 miles (air) northeast of La Porte. Comment
  CAS-BOT-BC74454  Rorippa curvisiliqua Lowell Ahart 1974-5-5 s.n. Butte Peter Ahart Ranch, Honcut. 150 Comment
  JEPS102310  Rorippa curvisiliqua Lowell Ahart 2001-4-27 8732 Butte 1 3/4 mi W of Honcut (S side of a road levee, just N of bridge across Wyandotte Creek, N of Lower Honcut Rd, 100 yds W of railroad, 1 1/4 mi E of Hwy 70) 26 Comment
  UC1594677  Rorippa curvisiliqua Lowell Ahart 1992-3-21 6738 Butte s Spillway Boat Launch Area (below the high water line Lake Oroville); below the high water line of Lake Oroville 243 Comment
  CHSC97695  Rorippa curvisiliqua var. curvisiliqua Lowell Ahart 2007-11-1 14542 Yuba On the south side of Willow Creek, above the high water line of Bullards Bar Reservoir, about 1 mile northwest of Old Camptonville Road, about 1 1/2 miles (air) west of Camptonville. 627 Comment
  CHSC117254  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2016-7-14 21163 Modoc West side of a new pond, south of Ash Creek Canal (now filled in), south of Ash Creek, Ash Creek Wildlife Area, 0.79 mile (air) south of County Road 87, 1.73 miles (air) west of Adin, Big Valley. 1273 Comment
  CHSC83086  Rorippa curvisiliqua var. orientalis Lowell Ahart 2002-10-17 9987 Butte On the gentle hills below the high water line of Lake Oroville, about 1 1/2 miles south of Highway 162 (Oroville Quincy Highway), about 3 miles (air) northeast of Oroville Dam. 227 Comment
  CHSC84969  Rorippa curvisiliqua var. orientalis Lowell Ahart 2003-10-23 10664 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC97750  Rorippa curvisiliqua var. orientalis Lowell Ahart 2007-11-8 14587 A Yuba North of the waterway between the headland and the large island, on the strand of Camp Far West Reservoir, about 1/4 mile south of Rock Creek, about 1/2 mile north of Bear River, about 6 miles (air) northeast of Sheridan. 73 Comment
  JEPS122115  Rorippa curvisiliqua var. orientalis Lowell Ahart 2014-8-24 19751 Plumas Center of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. Comment
  JEPS127165  Rorippa curvisiliqua var. orientalis Lowell Ahart, John Dittes 2016-7-14 21163 Modoc South of Ash Creek, Ash Creek State Wildlife Area, 0.79 mile (air) south of County Road 87, 1.73 miles (air) west of Adin, Big Valley. Comment
  CHSC113208  Rorippa palustris var. occidentalis Lowell Ahart 2014-4-25 19396 Butte Sides of a cleaned ditch, on the west side of Richvale South Highway, south of the intersection of Richvale South Road and Richvale South Highway, Richvale. 30 Comment
  CHSC43460  Rosa bridgesii Lowell Ahart 1973-5-6 218 Yuba About 1 mile north of Challenge. 762 Comment
  CHSC80967  Rosa bridgesii Lowell Ahart 2001-8-2 9052 Yuba On the south edge of the dirt road, Peterson Ridge Road, about 2 miles northeast of Oregon Hill Road, about 3 miles (air) southeast of Challenge. 701 Comment
  CHSC87832  Rosa bridgesii Lowell Ahart; John Dittes, Josephine Guardino 2004-6-6 10999 Plumas On the west side of a small drainage, on the north side of the logging road, about 1 1/2 miles (air) south of Lower Taylor Rock, about 7 1/2 miles (air) northeast of Quincy. 1517 Comment
  JEPS104088  Rosa bridgesii Lowell Ahart 2003-7-2 10342 Yuba About 200 yd south of the 4-H Camp, on the w side of Oregon Hill Rd, ca 1/2 mi n of Marysville Rd, ca 2 mi (air) ne of Dobbins. 815 Comment
  JEPS104092  Rosa bridgesii Lowell Ahart 2003-7-12 10373 Butte On both sides of Bald Rock Rd, ca 3 mi south of the Brush Creek Work Center, ca 15 mi (air) ne of Oroville. 1015 Comment
  JEPS110144  Rosa bridgesii Lowell Ahart 2006-6-24 12857 Butte Disturbed area on the west side of the dirt road (Ponderosa Way), at an intersection, a gated road goes northwest, on Cohasset Ridge, about 3 3/4 miles (air) northeast of Cohasset 1127 Comment
  CHSC82363  Rosa gymnocarpa Lowell Ahart 2002-7-6 9854 Plumas On the northwest side of Axford Creek, about 300 yards northeast of the gravel road, about 1 1/4 mile (air) east of the Robinson Mine, about 2 miles (air) southwest of Grizzly Mountain, about 4 miles (air) southwest of Haskins Valley and Bucks Lake. 1648 Comment
  CHSC106059  Rosa multiflora Lowell Ahart; Susan Mason, Josephine Guardino 2010-8-6 17042 Butte In landscaping, at Five Mile Recreation Area, Bidwell Park, Chico. 74 Comment
  CHSC82390  Rosa pisocarpa subsp. ahartii Lowell Ahart 2002-6-2 9680 Butte On the north side of Black Bart Road, and 1 1/2 miles east of the intersection of Forbestown Road and Black Bart Road, about 12 miles (air) southeast of Oroville. Along the road. 548 Comment
  CHSC91464  Rosa pisocarpa subsp. ahartii Lowell Ahart 2005-7-13 12144 Butte Ditch, about 20 yards south of the intersection of Forbestown Road and Black Bart Road, about 3 1/2 miles (air) southwest of Forbestown, about 12 miles (air) east of Oroville. 748 Comment
  CAS-BOT-BC146865  Rosa rubiginosa Lowell Ahart 1988-4-30 5972 Butte East of North Honcut Creek, on the Joie Osgood Ranch, about 1 1/2 miles north and 3 mile east of Honcut, about 12 miles southeast of Oroville 60 Comment
  CHSC99966  Rosa woodsii subsp. ultramontana Lowell Ahart; John Dittes 2008-8-26 15348 Modoc Southeast side of Rose Creek, 750 feet southwest of confluence of Rose Creek and Pit River, on the northwest side of unnamed road, 2660 feet east of intersection with County Road 85a, 9.3 miles (air) north-northeast of Lookout. 1276 Comment
  JEPS107934  Rosa woodsii subsp. ultramontana Lowell Ahart, John Dittes 2005-6-2 11944 Lassen Along a small stream, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, about 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  RSA716152  Rosa woodsii var. ultramontana L. Ahart 2005-7-13 12144 Butte About 20 yards S of the intersection of Forbestown Road and Black Bart Road. About 3.5 miles (air) SW of Forbestown. About 12 miles (air) E of Oroville. 749 Comment
  CAS-BOT-BC274227  Rostraria cristata Lowell Ahart 1982-4-29 3386 Butte Near the sign in station, Gray Lodge, about 12 miles south-west of Gridley 35 Comment
  CHSC116113  Rotala ramosior Lowell Ahart; John Dittes, Josephine Guardino, Steve Green 2015-11-14 20650 Yuba North of the spillway area, at the west side and near top of Lake Francis Dam, below the high water line of Lake Francis, about 1-1/2 miles south of Dobbins. 512 Comment
  CHSC47447  Rotala ramosior Lowell Ahart 1975-7-19 899 Butte Along the edge of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 2 1/2 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  JEPS122261  Rotala ramosior Lowell Ahart 2014-9-23 19866 Butte On the northeast part of Horseshoe Lake, about 100 yards northeast of the Rod and Gun Club, Upper Bidwell Park, about one mile east of Chico. Comment
  JEPS113573  Rubus laciniatus Lowell Ahart 2007-8-7 14409 Yuba Hampshire Creek Meadow, about 20 yards east of the dirt road, about 1 mile (air) east of Clipper Mills 1021 Comment
  JEPS115363  Rubus laciniatus Lowell Ahart 2009-7-9 16013 Butte On the east edge of big Chico Creek, about 15 yards west of Ten Mile House Road, Upper Bidwell Park about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 181 Comment
  RSA795723  Rubus parviflorus L. Ahart, John Dittes 2009-7-27 16169 Plumas Headwaters of Grizzly Gulch, 2.1 air miles NE of Butt Valley Reservoir Dam. 1480 Comment
  JEPS119753  Rubus ursinus Lowell Ahart 2012-5-14 18058 Butte 100 feet east of Table 13, south of Big Chico Creek, north side of the paved road, Lower Bidwell Park, Chico. Comment
  JEPS95968  Rumex acetosella Lowell Ahart 1999-6-12 8090 Butte large reservoir north of Beatson Hollow; North Table Mountain; about 2 1/2 miles (air) west of the entrance gates along the west side of Cherokee Road; about 7 miles (air) north of Oroville 295 Comment
  CAS-BOT-BC416367  Rumex californicus Lowell Ahart 1982-6-19 3595 Sutter Myers Ranch, Sutter Buttes, about 3/4 mile south of the Myers home 50 Comment
  CAS-BOT-BC422139  Rumex californicus Lowell Ahart 1988-6-28 6081 Butte Along North Honcut Creek, Joie Osgood Ranch, about 3/4 mile north and 2 1/2 miles east of Honcut 39 Comment
  CDA29951  Rumex conglomeratus L. Ahart 2009-6-3 15820 Butte Drainage below dam, about 100 yards west of the table at the old homestead and about 50 yards southwest of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) southwest of the intersection of Highway 32 and Ten Mile House road, about 10 miles northeast of Chico Comment
  CHSC97217  Rumex conglomeratus Lowell Ahart; Josephine Guardino 2007-7-20 14347 Plumas Strand of Lake Davis, about 100 yards west of Long Point, northeast side of Lake Davis. 1763 Comment
  CAS-BOT-BC421727  Rumex conglomeratus Lowell Ahart 1982-6-19 3596 Sutter About 3/4 mile south of the Myers home, Myers Ranch, Sutter Buttes 50 Comment
  CHSC33679  Rumex crispus L. Ahart 1981-5-16 2810 Butte In one of the drying duck ponds on Graylodge Waterfowl Mgmt Area, 11 mi sw of Gridley. 35 Comment
  JEPS115755  Rumex dentatus Lowell Ahart 2009-10-27 16492 Napa Below the high water line of Lake Berryessa, about 50 yards southeast of Eticuera Creek, about 150 yards south of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, about 20 miles (air) northwest of 130 Comment
  RSA755421  Rumex dentatus L. Ahart 2009-7-4 15998 Butte West side of the gravel road, about 100 yards south of parking lot 3, Gray Lodge Waterfowl Management Area, about 6 air miles southwest of Gridley. 21 Comment
  CHSC106213  Rumex fueginus Lowell Ahart; John Dittes 2010-8-31 17126 Modoc Edge of a pond, about 400 yards west of Elkins Lane and the bridge across Ash Creek, Ash Creek State Wildlife Area, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC81141  Rumex fueginus Lowell Ahart 2001-8-28 9216 Plumas Strand of Lake Almanor, west of the intersection of the dirt road to Last Chance Marsh and the poor dirt road that goes south along Lake Almanor to the causeway of Highway 36, about 3/4 mile northeast of Chester. 1371 Comment
  JEPS102609  Rumex maritimus Lowell Ahart 2001-10-16 9374 Plumas On the SW side of Round Valley Reservoir, about 2 1/2 miles SW of Greenville. 1363 Comment
  RSA727115  Rumex pulcher L. Ahart 2007-5-14 13868 Yuba About 13 miles (air) northeast of Marysville. 36 Comment
  CAS-BOT-BC433854  Rumex pulcher Lowell Ahart 1977-5-19 s.n. Sutter South Butte, Sutter Buttes. 200 Comment
  JEPS117448  Rumex salicifolius var. denticulatus Lowell Ahart 2010-9-15 17166 Sierra Along stream, near a dry open meadow, about 150 yards north of the cabin, about 40 yards north of the lower pond, at the spring, about 2 3/4 miles (air) north of Yuba Pass on Highway 49, about 4 miles (air) east of Haskell Peak 2134 Comment
  CHSC80865  Rumex salicifolius var. triangulivalvis Lowell Ahart 2001-7-21 8976 Nevada Near the edge of a large meadow, on the south side of the dirt road, 50 yards east of the old sheep corral, northeast of Lake Van Norden, about 1 1/2 miles east of Soda Springs. 2063 Comment
  CHSC99833  Rumex salicifolius var. triangulivalvis Lowell Ahart 2008-8-13 15173 Plumas West side of La Porte Road, west of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of LaPorte. 1613 Comment
  JEPS121296  Rumex stenophyllus Lowell Ahart, John Dittes 2013-7-22 18866 Lassen North margin of road levee, about 100 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS122178  Rumex triangulivalvis Lowell Ahart 2014-8-26 19778 Plumas On the south side of the South Fork of the Feather River, Little Grass Valley Reservoir, about 200 yards southwest of the parking lot to the Pacific Crest Trail, about 1/4 mile southwest of the bridge across the South Fork of the Feather River, about 4 miles (air) north of La Porte. Comment
  JEPS103307  Sagina apetala Lowell Ahart 2002-4-27 9550 Tehama About 10 yards NW of the cattle guard, NW of where the road is wide and one can park, on the W side of the dirt road that leads to the tower, E of Road M2, ca 8 miles W of Paskenta. 609 Comment
  JEPS121129  Sagina apetala Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18605 Mendocino 1.1 air miles SSE of Anchor Bay, 2.0 air miles NW of mouth of Gualala River. Comment
  SEINET10537603  Sagina apetala Lowell Ahart 1985-3-4 Ahart 4842 Butte At the Palermo Post Office, Palermo. Comment
  JEPS113284  Sagina decumbens subsp. occidentalis Lowell Ahart 2007-4-16 13673 Butte On the south side of a small wash, about 100 yards east of North Honcut Creek, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville 63 Comment
  CHSC95003  Sagina saginoides Lowell Ahart 2006-10-23 13478 Plumas On the west side of Slate Creek (there is a large gravel flat caused by the dam), about 30 yards south of where the road ends, about 20 yards north of the dam across Slate Creek, about 1/8 mile northeast of Scales Road, about 5 1/2 miles (air) northeast of Strawberry Valley. 1281 Comment
  CAS-BOT-BC267091  Sagittaria sanfordii Lowell Ahart 1987-10-22 5920 Butte In shallow water in Madrone Lake, near the Oroville Quincy Highway 609 Comment
  HSC100745  Salix breweri Lowell Ahart 2010-9-15 17172 Sierra N edge of first pond, S side of road and W of the cabin at the spring, 2 3/4 (air) mi. N of Yuba Pass on Hwy. 49, 4 (air) mi. E of Haskell Peak. 2135 Comment
  JEPS107367  Salix exigua Lowell Ahart 2005-4-14 11709 Butte East of the railroad tracks, north of Spruce Street, Gridley 28 Comment
  CHSC113848  Salix exigua var. hindsiana Lowell Ahart 2014-9-9 19851 Plumas Below the high water line,on the sides of Sly Creek, Sly Creek Reservoir, about 7 miles (air) southwest of La Porte. 1069 Comment
  RSA0058981  Salix gooddingii Lowell A. Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-4-16 17866 Butte On the south side of Big Chico Creek, east of the Deer Pen, between Table 12 & 13, Lower Bidwell Park, Chico. 65 Comment
  CHSC112259  Salix laevigata Lowell Ahart 2013-4-20 18552 Butte Twig from a tree 30 feet tall, on the sides of a dredge pile, in Wilson Creek, about 100 yards southwest of the oak trees, about 1/2 mile north of the barn, about 3/4 mile north of the Honcut Cemetary, about 3 3/4 miles (air) northeast of Honcut. 49 Comment
  CHSC108858  Salix lasiolepis Lowell Ahart 2012-2-22 17750 Butte Around the edges of the pond east of the table, at the old homestead, about 5/8 mile west of Highway 32, about 9 miles (air) northeast of Chico. 259 Comment
  JEPS127145  Salix lasiolepis Lowell Ahart, John Dittes 2016-8-25 21303 Tehama Anderson River Park, 0.7 mile (air) upstream from Stillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderson. Undesignated Section of San Buenaventura Land Grant. Comment
  SBBG126084  Salix lasiolepis L. Ahart 2012-2-22 17750 Butte pond E of the table, at the old homestead, ca 5/8 mi W of Hwy 32, ca 9 mi NE of Chico 259 Comment
  RSA726287  Salix lemmonii L. Ahart, John Dittes 2007-6-16 14128 Plumas S side of County Road 111 (Beckwourth Gensee Road). 50 yards E of Forest Rd 24N08. Red Clover Valley. About 2 miles (air) N of the N end of Lake Davis. 1648 Comment
  CHSC90635  Salix lucida subsp. lasiandra Lowell Ahart 2005-4-2 11695 Butte Overflow area on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 25 Comment
  SEINET3450724  Salix lucida subsp. lasiandra Lowell Ahart, John Dittes 2003-5-22 10203 Shasta Cottonwood, Cottonwood, about 11 air miles east/northeast, 4 air miles west/southwestof Darah Springs State Fish Hatchery, about 1 1/8 miles west of the barn, about 150 yards south of the Coleman Canal, east of the poor dirt road 250 Comment
  CHSC42771  Salix melanopsis Lowell Ahart 1987-8-8 5855 Butte North Honcut Creek, about 2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. 67 Comment
  CHSC94971  Salix melanopsis Lowell Ahart 2006-10-14 13507 Butte On the north side of North Honcut Creek, Peter Ahart Ranch, about 3/4 mile north and 2 1/2 miles east of Honcut, about 12 miles southeast of Oroville. 44 Comment
  JEPS104450  Salix melanopsis Lowell Ahart 2003-6-11 10261 Tehama On the w side of Battle Creek, ca 1 mi n of Manton Rd, ca 1 1/2 mi (air) ne of the Colman Power House, ca 5 mi (air) wsw of Darah Springs State Fish Hatchery, ca 10 mi (air) ene of Cottonwood. 153 Comment
  CHSC101933  Salix scouleriana Lowell Ahart; John Dittes 2009-7-15 16079 Plumas On dry rocky soil, along a small wash, on the south side of Forest Service Road 26N671, northeast of Forest Service Road 26N67, about 2.8 miles (air) southeast of Butt Valley Reservoir Dam. 1702 Comment
  CDA42945  Salsola tragus L. Ahart 2012-10-28 18517 Butte East edge of Highway 70, about 1/4 mile south of Cottonwood Road, about 3 miles north of Oroville. Comment
  JEPS128768  Salvia aethiopis Lowell Ahart, John Dittes, Josephine Guardino 2017-6-15 21406 Shasta East of a poor dirt road, near Fall River Lake, about 0.8 mile northwest of airport runway, about 1.2 miles (air) north of Fall River Mills, Fall River Valley. Comment
  CHSC31560  Sambucus mexicana L. Ahart 1974-5-14 452 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC99916  Sambucus mexicana Lowell Ahart 2008-7-18 15113 Nevada On the north side of the water ditch, along the P. G. and E. water ditch at the 3 1/4 mile mark, about one mile southwest of Highway 20 (by ditch), about 1/2 mile south of Bear Valley. 1744 Comment
  CHSC12398  Samolus parviflorus Lowell Ahart 1973-6-28 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET10940264  Samolus parviflorus Lowell Ahart 1984-7-25 Ahart 4762 Butte Along the wet edges of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut, about 12 miles south of Oroville. Comment
  CHSC63111  Sanicula graveolens Lowell Ahart 1994-7-7 7450 Plumas On the north side of the Pacific Crest Trail, on Bunker Hill Ridge, about 3/4 mile (air) south-east of Pilot Peak. 2011 Comment
  SBBG128727  Sanicula graveolens L. Ahart 2008-7-16 15099 Plumas dry open area, W of a small meadow (swamp), N of a small deep stream, ca. 130 yards N of paved rd, ca. 1/4 mi W of bridge where the S Fork of the Feather River flows into Little Grass Valley Reservoir, ca. 2 1/2 mi (air) N of La Porte 1597 Comment
  JEPS88901  Sanicula tuberosa Lowell Ahart 1994-6-5 7302 Yuba about 3 air mi e Forbestown (on s side of Costa Creek, on e side of Forbestown Road); Costa Creek, Forbestown Road 853 Comment
  JEPS115232  Saxifraga integrifolia Lowell Ahart, John Dittes 2009-3-20 15510 Butte Open area west of the Guardian Rock Trail, about 175 yards southwest of the Ten Mile House Road Trail, about 300 yards west of Highway 32, west of the intersection of Highway 32 and Ten Mile House Road, Upper Bidwell Park, about 10 miles northeast of Chic 407 Comment
  SEINET10871269  Saxifraga nidifica Lowell Ahart 1983-3-27 Ahart 3905 Butte Peter Ahart Ranch, ca. 3 mi NE of Honcut. Valley Grassland; 50 m. 50 Comment
  CHSC114939  Scandix pecten-veneris Lowell Ahart 2015-4-13 20040 Butte Gold mined area on the south side of the road on the boat ramp, Vinton Gulch, about 10 miles (air) north of Oroville. Foothill Woodland. 307 Comment
  CHSC108314  Schoenoplectus acutus var. occidentalis Lowell Ahart 2011-8-17 17632 Butte On the west edge of the pond, on the east side of the trail and dam, at the old homestead, about 100 yards south of Ten Mile House Road, about 5/8 mile (air) west of Highway 32, about 9 miles (air) northeast of Chico. 249 Comment
  CHSC94324  Scirpus diffusus Lowell Ahart 2006-7-25 13062 Colusa In the west part of a large wet meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1569 Comment
  CHSC80886  Scirpus microcarpus Lowell Ahart; Vernon H. Oswald 2001-7-23 9001 Plumas Meadow, on the south side of a poor logging road, start of a small branch of Butt Creek, about 2 1/2 miles (air) north of Humboldt Summit. 1828 Comment
  CHSC101316  Scleranthus annuus subsp. annuus Lowell Ahart 2009-4-22 15574 Butte West side of the Guardians Trail, about 100 yards north of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC116225  Scleranthus annuus subsp. annuus Lowell Ahart 2015-6-16 20228 Butte On the west side of the paved road, about 4 miles (by road) northwest of Fall River Bridge, about 5 1/2 miles (air) northwest of Camp 18, about 9 miles (air) northeast of Feather Falls. 1406 Comment
  CHSC84120  Scribneria bolanderi Lowell Ahart 2003-5-18 10180 Butte Wash, Peter Ahart Ranch, about 2 miles north and 2 miles east of Honcut, about 12 miles southeast of Oroville. 48 Comment
  SEINET3450762  Scribneria bolanderi Lowell Ahart, John Dittes 2003-5-12 10168 Shasta Cottonwood, Cottonwood, About 12 air miles east/northeast, 2.8 air miles west/wouthwest of Darah Springs State Fish Hatchery, about 0.25 miles south of the Coleman Canal, about 250 yards south of the barn. 260 Comment
  CHSC84280  Scrophularia californica subsp. floribunda Lowell Ahart; John Dittes 2003-6-11 10264 Shasta Below or south of the dirt road on the Colman Canal, about 3 miles west of the barn, 5 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 10 miles (air) east-northeast of Cottonwood. 288 Comment
  UCD125705  Scutellaria californica L. Ahart 1982-5-28 3439 Butte on north slope near North Honcut Creek, near Peter Ahart Ranch, around 3 miles northeast of Honcut. 50 Comment
  CHSC102849  Scutellaria siphocampyloides Lowell Ahart 2009-5-30 15808 Butte On the southeast side of Guardians Trail, about 10 yards south of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 436 Comment
  CHSC112466  Scutellaria siphocampyloides Lowell Ahart 2013-5-27 18708 Butte About 150 yards east of the intersection of Forbestown Road and Black Bart Road, about 3 1/4 miles (air) southwest of Forbestown. 763 Comment
  JEPS115658  Scutellaria siphocampyloides Lowell Ahart 2009-5-30 15808 Butte On the southeast side of Guardians Trail, about 10 yards south of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico 436 Comment
  CHSC87928  Secale cereale Lowell Ahart 2004-5-17 10936 Butte On the south side of the Midway, about 1/2 mile east of the railroad, about 1 1/2 miles northeast of Durham. 54 Comment
  CHSC39683  Sedella pumila Lowell Ahart 1983-5-4 3961 Sutter Along Pass Road, Sutter Buttes. On the south side of Pass Road, about 2 miles west of Kellogg Road. 50 Comment
  CHSC116668  Selaginella hansenii Lowell Ahart; John Dittes, Josephine Guardino 2016-2-11 20695 Tehama On the west side of Deer Creek Trail, about 100 yards northwest of the fish ladder, about 2 miles by trail to Highway 32. 883 Comment
  JEPS113219  Selaginella hansenii Lowell Ahart 2007-2-24 13583 Butte At and below the high water line on the west side of North Honcut Creek, on and around metavolcanic rock, Peter Ahart Ranch, about 3/4 mile north and 2 2/3 miles east of Honcut, about 12 miles southeast of Oroville 53 Comment
  CAS-BOT-BC62121  Selaginella hansenii Lowell Ahart 1979-4-3 s.n. Butte near N Honcut Creek, Peter Ahart Ranch, Honcut 50 Comment
  CDA7667  Senecio sylvaticus L. Ahart 1998-6-3 7966 Butte About 1/4 mile north of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. Comment
  CHSC105813  Senecio triangularis Lowell Ahart 2010-9-21 17206 Butte Open meadow like area in red fir forest, about 70 yards east of the poor dirt road, about 80 yards west of Big Kimshew Creek, about 1 1/2 miles (air) northeast of Jones Meadow, about 2 1/2 miles (air) southeast of Philbrook Reservoir. 1917 Comment
  JEPS107425  Senecio vulgaris Lowell Ahart 2005-5-4 11583 Nevada Spenceville Wildlife Management Area. On road bank, on the N side of Spenceville Rd (no longer maintained), ca. 1/2 mi E of the wood bridge across Dry Creek, ca. 3 1/2 mi E of the intersection of Camp Far West Rd and Spenceville Rd 128 Comment
  RSA755040  Senecio vulgaris L. Ahart 2009-5-15 15692 Butte E side of Big Chico Creek, about 50 yards W of Ten Mile House Road, Upper Bidwell Park, about 3/4 air mile W of Highway 32, about 10 miles NE of Chico. 204 Comment
  CHSC102143  Sericocarpus oregonensis Lowell Ahart; John Dittes 2009-7-27 16183 Plumas On dry soil, about 20 yards north of the poor dirt road, about 10 yards west of a small pond, headwaters of Grizzly Gulch, 2.1 miles (air) northeast of Butt Valley Reservoir Dam. 1479 Comment
  CHSC112631  Setaria parviflora Lowell Ahart 2013-10-16 19118 Butte South edge of the paved road, about 100 yards southeast of the restroom, near end of road to the Larkin Road Boat Launch Area, about 1/4 mile west of Larkin Road, about 2 miles (air) southwest of the Oroville Airport. 28 Comment
  CHSC105952  Setaria viridis Lowell Ahart 2010-9-24 17237 Butte Near the southwest edge of the Golf Course, about 10 yards south of the footbridge, along trail from the end of Centennial Avenue to the footbridge across Big Chico Creek, Bidwell Park. 91 Comment
  JEPS94686  Sidalcea calycosa subsp. calycosa Lowell Ahart 1998-6-3 7964 Butte about 7 air mi n of Oroville (North Table Mountain, abut 1/4 mi n of the cow chute along Cherokee Road); North Table Mountain, Cherokee Road 403 Comment
  CHSC41466  Sidalcea diploscypha Lowell Ahart 1986-5-4 5271 Sutter South-east of the rocky hill that is about 1/8 mile west of the Dean Cabin, Dean Ranch, about 5 miles north-west of Sutter, Sutter Buttes. 259 Comment
  CHSC92009  Sidalcea glaucescens Lowell Ahart 2005-7-31 12221 Nevada Along the west side of a small wash, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2062 Comment
  JEPS117413  Sidalcea glaucescens Lowell Ahart 2010-9-28 17246 Butte Along the east side of Big Kimshew Creek, about 100 yards east of the poor dirt road, about 1 1/2 miles (air) northeast of Jones Meadow, about 2 1/2 miles (air) southeast of Philbrook Reservoir 1886 Comment
  JEPS107752  Sidalcea hirsuta Lowell Ahart 2005-5-11 11792 Butte In deeper vernal pools, south part of North Table Mountain, about 200 yards northwest of the poor dirt road off of Cherokee Road, about 200 yards south of the rim into Beatson Hollow, about 7 miles (air) north of Oroville 358 Comment
  RSA726961  Sidalcea hirsuta L. Ahart 2007-5-14 13851 Yuba About 1/2 mile north of Fruitland Road, about 13.5 miles (air) northeast of Marysville. 29 Comment
  RSA734315  Sidalcea oregana subsp. spicata L. Ahart 2006-7-25 13709 Tehama In a small meadow on the west side of the road, near Colby Creek, about 40 yards southeast of where the dirt road crosses Colby Creek, about 2 miles (a0r) southeast of Colby Mountain, about 5 miles northeast of Butte Meadows. 1519 Comment
  JEPS115622  Sidalcea robusta Lowell Ahart 2009-5-15 15681 Butte 10 yards east of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 235 Comment
  CAS-BOT-BC384466  Silene antirrhina Lowell Ahart 1985-5-31 5032 Butte About 25 feet below the high water line of Lake Oroville, 1/8 mile east of the Enterprise Launch Area, about 1/2 mile west of the Enterprise Bridge across Lake Oroville, north-east of Oroville 274 Comment
  SEINET10537492  Silene antirrhina Lowell Ahart 1985-5-31 Ahart 5032 Butte Lake Oroville, 1/8 mile east of the Enterprise Launch Area, about 1/2 mile west of the Enter- prise Bridge across Lake Oroville, north-east of Oroville. Comment
  JEPS113816  Silene douglasii var. douglasii Lowell Ahart, John Dittes 2007-8-9 14434 Plumas About 50 yards west of the poor road, west slope of Mount Ingalls, about 6 miles (air) northwest of the north end of Lake Davis 2551 Comment
  JEPS118057  Silene gallica Lowell Ahart 2011-6-7 17389 Yuba West of a willow shrub, just south of the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville 66 Comment
  UC1527285  Silene invisa Lowell Ahart 1986-7-8 5351 Plumas about 1 mi nw Pilot Peak (about 14 mi ne); nw of Pilot Peak, ne of La Porte 1981 Comment
  CHSC10828  Silene lemmonii Lowell Ahart 1969-7-30 Placer Handy Camp, French Meadows. 1524 Comment
  CAS-BOT-BC389290  Silene lemmonii Lowell Ahart 1983-5-28 4018 Butte Along the trail to Feather Falls, near the over-look, about 5 1/2 miles north of the town of Feather Falls 600 Comment
  RSA325168  Sinapis alba L. Ahart 1984-4-19 4583 Sutter Ca 100 m N of the jct of Pass Road and West Butte Road, along W Butte Road, Sutter Buttes, W of Marysville. 35 Comment
  CDA3903  Sinapis alba L. Ahart 2001-4-15 8723 Butte On the north side of the dirt road east of the large pump, on the south side of Evans-Reimer Road, about 1 mile east of Pennington Road, Gray Lodge Waterfowl Management Area, about 4 miles (air) southwest of Gridley. Comment
  CHSC106340  Sisymbrium altissimum Lowell Ahart; John Dittes 2010-8-30 17078 Modoc Along the fence, south edge of the meadow, Ash Creek State Wildlife Area, 2,300 feet north of Lassen County Line, about 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107671  Sisymbrium altissimum Lowell Ahart, John Dittes 2005-6-9 12020 Siskiyou Open pasture field, on the east side of a poor rock fence, about 300 yards east of where cattle water in the Shasta River, about 3/5 mile (air) south of Highway 99/97 Cutoff, about 2 1/2 miles (air) east-southeast of Grenada 774 Comment
  CAS-BOT-BC75123  Sisymbrium altissimum Lowell Ahart 1981-9-6 3093 Plumas Sierra Nevada. 1.5 mile southwest of Crescent Mills. 1200 Comment
  RSA0115083  Sisyrinchium bellum Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18644 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  CDA5725  Smilacina stellata L. Ahart 2002-6-29 9810 Tehama On the south side of the upper east branch of Colby Creek, about 1/8 mile east of Colby Mountain Lookout Road, about 1 3/4 miles (air) east of Colby Mountain, about 5 1/2 miles (air) northeast of Butte Meadows. Comment
  JEPS103321  Smilacina stellata Lowell Ahart 2002-6-29 9810 Tehama On the S side of the upper E branch of Colby Creek, ca 1/8 mile E of Colby Mountain Lookout Road, ca 1 3/4 miles (air) E of Colby Mountain, ca 5 1/2 miles (air) NE of Butte Meadows. 1595 Comment
  CDA34752  Solanum americanum L. Ahart, John Dittes 2010-10-4 17296 Tehama Along Toomes Creek, Toomes Creek at Tehama-Vina Road crossing, 1.2 miles (air) east of the Sacramento River, 3.4 miles (air) southeast of Los Molinos (High School), 3 miles (air) northwest of Vina. Comment
  CHSC92478  Solanum americanum Lowell Ahart 2005-11-20 12492 Butte On the east side of the North Fork of the Feather River, about 50 yards southwest of the Poe Power House. 275 Comment
  JEPS115144  Solanum americanum Lowell Ahart 2009-11-12 16540 Mendocino On the south side of the Russian River, below the high water line of Lake Mendocino, about 200 yards south of Highway 20 230 Comment
  RSA795337  Solanum dulcamara L. Ahart, John Dittes 2010-7-30 16939 Siskiyou Along the south edge of the Shasta River, about 100 yards east of the East Louie Road Bridge, Shasta Big Springs Ranch, 1.6 air miles southwest of Big Springs Lake, 4.6 air miles northwest of Dwinnel Dam, 5.7 air miles southeast of Grenada. 717 Comment
  SEINET10546504  Solanum nodiflorum Lowell Ahart, Peter Ahart 1985-11-5 Ahart 5225 Butte Lake Oroville, about 1/2 mile west of the Ponderosa Dam, near where Sucker Creek flows into the South Fork of the Feather River. Comment
  CHSC93797  Solanum parishii Lowell Ahart 2006-5-19 12633 Butte Road bank, on the west side of the dirt road, Bardees Bar Road, south of the small stream, about 1/4 mile southwest of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 3/4 miles (air) southwest of Pulga. 405 Comment
  CHSC76423  Solanum rostratum Lowell Ahart 1999-10-28 8320 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  JEPS102317  Solanum umbelliferum Lowell Ahart 2001-6-4 8752 Plumas 4 1/2 air miles N of La Porte (W side of the dirt road, W of South Fork of the Feather River, about 1/4 mi N of Little Grass Valley Reservoir) 1584 Comment
  SEINET10581086  Solanum umbelliferum Lowell Ahart 1987-5-22 Ahart 5674 Butte N of Lumpkin Ridge Road, 1 1/2 mi E of Camp 18, about 8 mi NE of Feather Falls 1280 Comment
  SEINET10829502  Solanum umbelliferum Lowell Ahart 1987-5-9 Ahart 5599 Butte Along Pulga Road, about 0.5 mile SW of Bardees Bar along the North Fork of the Feather River about 3 miles SW of Pulga. 366 Comment
  CHSC78373  Solidago elongata Lowell Ahart 2000-7-28 8613 Nevada Open flat and near a small dry stream, east side of Fall Creek, about 1/8 mile northeast of where Fall Creek crosses Forest Highway 18, or Bowman Lake Road, about 5 miles (air) or 8 miles by road north of Highway 20 and Bear Valley. 1706 Comment
  CHSC97247  Solidago elongata Lowell Ahart; John Dittes, Josephine Guardino 2007-8-10 14470 Plumas About 100 yards south of Beckwourth Gensee Road, there is a small quarry east of a poor road, the meadow and stream, about 2 miles (air) north of the north end of Lake Davis. 1761 Comment
  JEPS98537  Solidago elongata Lowell Ahart 2000-7-28 8613 Nevada Open flat and near a small dry stream, east side of Fall Creek, about 1/8 mile northeast of where Fall Creek crosses Forest Highway 18, or Bowman Lake Road, about 5 miles (air) or 8 miles by road north of Highway 20 and Bear Valley. 1706 Comment
  JEPS104657  Solidago velutina subsp. californica Lowell Ahart 2003-8-11 10493 Tehama Near a drainage, burned area on the w side of road M2, ca 9 mi w of Paskenta. 875 Comment
  JEPS113108  Soliva sessilis Lowell Ahart, Brian Williams 2007-4-13 13634 Placer Open pasture fields, about 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln 43 Comment
  CHSC112308  Sonchus asper subsp. asper Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18603 Mendocino North Coast. Base of eroding cliffs, above the sand beach, 1.1 miles (air) southeast of Anchor Bay, 2.0 miles (air) northwest of mouth of Gualala River. 3 Comment
  CHSC80610  Sonchus asper subsp. asper Lowell Ahart 2001-6-16 8874 Tehama On north side of the dirt road, about 4 1/2 miles west of Highway 32, west of Soda Springs Campground, about 5 miles (air) west of Butte Meadows. 1112 Comment
  CHSC31659  Sonchus oleraceus L. Ahart 1978-7-15 1782 Butte Around the garden, Peter Ahart Ranch, Honcut. 50 Comment
  JEPS115664  Sonchus oleraceus Lowell Ahart 2009-5-30 15791 Butte By a small rock about 50 yards south of the fence and about 120 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  JEPS117702  Sonchus oleraceus Lowell Ahart 2010-5-14 16671 Butte On the south side of a trail, about 1/2 mile west of the entrance to the Disc Golf Area, west of Highway 32. Upper Bidwell Park, about 4 1/2 miles (air) northeast of Chico 260 Comment
  CAS-BOT-BC157206  Sorbus californica Lowell Ahart 1989-5-29 6323 Butte West of Pinkard Creek, about 1/4 mile north of the Lost Creek Dam 1005 Comment
  JEPS95809  Sorghum halepense Lowell Ahart 1999-10-28 8318 Butte northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  CHSC112243  Spergularia bocconi Lowell Ahart 2013-4-29 18656 Butte In corral at the barn, about 1/4 mile north of the Honcut Cemetary, about 3 1/4 miles (air) northeast of Honcut. 47 Comment
  CHSC50993  Spergularia rubra Lowell Ahart 1990-7-4 6548 Butte Along McCabe Creek, below the high water line of Lake Oroville, about 1/2 mile south-west of the Enterprise Bridge across Lake Oroville. 243 Comment
  CHSC92509  Spergularia rubra Lowell Ahart 2005-12-11 12512 Butte On the sides of small ditches, on the Rice Experiment Station, between the Main Ditch and Stine Lateral, on the north side of Hamilton Road, about 1/4 mile east of Riceton Highway, about 2 1/4 miles (air) east of Biggs. 30 Comment
  JEPS122133  Spergularia rubra Lowell Ahart, John Dittes 2014-5-16 19478 Tehama About 200 yards southwest of the lone oak tree, about 1/2 mile east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. Comment
  SEINET10965512  Spergularia rubra Lowell Ahart 1984-6-3 Ahart 4657 Plumas On a road along Hwy 70, at Keddie, N of Quincy; Yellow Pine Forest; 1000 m. 1000 Comment
  CHSC94516  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS115576  Stachys ajugoides var. rigida Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16316 Tehama On the east side of Forest Service Road 29N25A, Childs Meadows, about 2,600 feet south of the intersection of Highway 36 (89) and Forest Service Road 29N25A, 2.3 miles (air) northeast of the town of Mill Creek, 9.1 miles (air) south of Lassen Peak 1493 Comment
  HSC95544  Stachys rigida var. rigida L. Ahart 2003-9-7 10557 Plumas Hartman Bar Ridge, about 1 mi. SW of Franklin Hill, about 3 1/2 mi. NW of Tamarack Flat, about 6 mi. NW of Little Grass Valley Reservoir Dam. 1524 Comment
  CHSC61310  Stellaria crispa Lowell Ahart 1993-7-31 7136 Butte On the west side of the dirt road, about 1 1/2 miles south-east of Bald Mountain, north-east of Stirling City. 1493 Comment
  JEPS114778  Stellaria crispa Lowell Ahart 2008-7-18 15124 Nevada Near a small stream, about 50 yards north of the water ditch, along the PG&E water ditch at the 3 1/4 mile mark, about one mile southwest of Highway 20 (by ditch), about 1/2 mile south of Bear Valley 1744 Comment
  CAS-BOT-BC391084  Stellaria longipes subsp. longipes Lowell Ahart 1983-8-16 4306 Butte Near Bull Hill Road, about 3 1/2 miles south of Butte Meadows 1600 Comment
  CHSC104004  Stellaria media Lowell Ahart 2010-5-28 16739 Butte Wood chipped area on the north side of Bidwell Mansion, Chico . 60 Comment
  CHSC111720  Stellaria media Lowell Ahart 2012-6-14 18186 Butte On the south side of the path, south of CARD Community Center, Lower Bidwell Park, Chico. 62 Comment
  JEPS119897  Stellaria media Lowell Ahart, Linnea Hanson, Josephine Guardino 2012-5-23 18112 Butte On the north side of Big Chico Creek, along the horse trail, near Table 31, north of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC109120  Stellaria nitens Lowell Ahart 2012-3-23 17777 Butte In a small meadow opening in brush, about 100 yards south of the intersection of Guardian Trail and Ten Miles House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico. 437 Comment
  CAS-BOT-BC395090  Stellaria nitens Lowell Ahart 1984-3-31 4530 Sutter Dean Ranch, Sutter Buttes, near top of rocky hill just east of Old Man, about 1/2 mile south of the Dean Cabin. 400 Comment
  CAS-BOT-BC395091  Stellaria nitens Lowell Ahart 1982-3-6 3239 Sutter Dean Ranch, Sutter Buttes, hill west of the Dean Cabin. 350 Comment
  CAS-BOT-BC395113  Stellaria nitens Lowell Ahart 1980-3-11 2035 Butte Peter Ahart Ranch, Honcut 50 Comment
  CHSC66524  Stephanomeria lactucina Lowell Ahart 1996-7-25 7695 Sierra South of the Old Henness Pass Road, west of French Meadow, about 2 miles west of Webber Lake. 1950 Comment
  RSA0035827  Stephanomeria lactucina Lowell A. Ahart 2008-8-14 15195 Plumas 20 yards northeast of the metal gate, east side of Forest Road 22N68, about 50 yards west of the South Fork of the Feather River, about 1/2 mile northeast of Little Grass Valley Reservoir, about 5 miles (air) northeast of La Porte. 1571 Comment
  RSA769213  Stephanomeria virgata subsp. pleurocarpa L. Ahart 2009-10-12 16430 Napa Just above high water line of Lake Berryessa, along the west side of Capell Creek north of Rest Area, 3/4 mile northeast of Highway 128 on Berryessa Knoxville Road, 3/4 mile southwest of Capell Cove Launch Ramp on Berryessa Knoxville Road., About 19 air miles west of Winters. 133 Comment
  UCD169855  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2009-10-12 16430 Napa Along the west side of Capell Creek north of Rest Area, 3/4 mile northeast of Highway 128 on Berryessa Knoxville Road, 3/4 mile southwest of Capell Cove Launch Ramp on Berryessa Knoxville Road, about 19 miles(air) west of Winters. 133 Comment
  SEINET10934981  Stipa lemmonii Lowell Ahart 1985-5-15 Ahart 5004 Butte 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow of Reservoir. Comment
  HSC103816  Streptanthus L. Ahart 2006-7-11 12939 Butte About 50 yds. S of Humboldt Road, ~1.5 air mi. SW of Butte Meadows 1436 Comment
  RSA0085003  Streptanthus longisiliquus L. Ahart 2006-7-11 12939 Butte 50 yards south of Humboldt Road, about 1.5 miles (air) southwest of Butte Meadows. 1436 Comment
  CHSC11379  Streptanthus polygaloides Lowell Ahart 1970-7-2 60 Plumas 12 miles E. of Pulga. 762 Comment
  CHSC94121  Streptanthus polygaloides Lowell Ahart 2006-6-21 12807 Sierra On the west side of the Foote Road, about 3.7 miles (by road) southwest of Alleghany. 1093 Comment
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Jun 21 2014
  HSC96717  Streptanthus polygaloides L. Ahart 2006-5-10 12612 Butte N side of poor dirt road, Bardees Bar Rd., 100 yds. N of poor bridge across N Fork of Feather River at Bardees Bar, 2.5 mi. SW of Pulga 355 Comment
  CHSC116998  Streptanthus tortuosus var. pallidus Lowell Ahart 2016-6-4 20917 Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. 387 Comment
  JEPS117225  Streptanthus tortuosus var. suffrutescens Lowell Ahart 2010-5-16 16695 Butte Basalt cliffs, about 1/2 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville 364 Comment
  CAS-BOT-BC48066  Styrax redivivus Lowell Ahart 1966-5-10 s.n. Butte Bidwell Bar, now the are is under Lake Oroville. 500 Comment
  CHSC99142  Swertia albicaulis var. albicaulis Lowell Ahart; John Dittes 2008-6-19 14881 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  SEINET10972042  Symphoricarpos rivularis Lowell Ahart 1983-9-4 Ahart 4389 Sutter Ca. 1/2 mi NW of the Dean Cabin, Dean Ranch, Sutter Buttes, W of Marysville. Foothill Woodland; 300 m. 300 Comment
  CHSC102659  Symphyotrichum bracteolatum Lowell Ahart; John Dittes 2009-8-28 16353 A Plumas On damp to wet soil, seep, on the north side of Forest Service Road 27N98, headwater of Clear Creek, about 2.0 miles (air) north of Butt Valley Reservoir Dam, about 3 miles (air) southwest of Lake Almanor Reservoir Dam. 1476 Comment
  CHSC109791  Symphyotrichum bracteolatum Lowell Ahart 2012-10-20 18492 Butte About 50 yards west of Table 4, west of Cedar Grove, Lower Bidwell Park, Chico. 68 Comment
  JEPS115359  Symphyotrichum bracteolatum Lowell Ahart 2009-7-9 16026 Butte On the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 236 Comment
  CHSC109753  Symphyotrichum chilense Lowell Ahart 2012-10-20 18486 Butte On the south side of Big Chico Creek, on the east side of the bridge, north of the restrooms, about 200 yards west of Cedar Grove, Lower Bidwell Park, Chico. 70 Comment
  CHSC81344  Symphyotrichum frondosum Lowell Ahart 2001-9-18 9279 Plumas Along Freeman Creek, on the strand of Lake Davis. 1761 Comment
  JEPS108934  Symphyotrichum spathulatum var. spathulatum Lowell Ahart 2006-9-9 13245 Butte West side of a large meadow with bogs, about 75 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows 1560 Comment
  CHSC43240  Symphyotrichum subulatum var. parviflorum Lowell Ahart 1987-9-24 5895 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles southeast of Jarbo Gap. 271 Comment
  UCD136673  Symphyotrichum subulatum var. parviflorum L. Ahart 1982-9-9 3767 Butte 100 meters north of check-in station, Graylodge Wildlife Refuge, 12 miles SW of Gridley. 35 Comment
  CHSC109620  Taraxacum officinale Lowell Ahart 2012-5-14 18047 Butte Along the edges of the paved road, a little west of Table 9, east of Cedar Grove, Lower Bidwell Park, Chico. 70 Comment
  CHSC91244  Taraxacum officinale Lowell Ahart; John Dittes 2005-6-10 12081 Siskiyou South edge of pasture, east of a poor dirt road, about 80 yards northeast of the pump house along the Shasta River, about 1.9 miles (air) south of Highway 99/97 Cutoff, about 6 miles (air) east-southeast of Grenada. 776 Comment
  JEPS118448  Taraxacum officinale Lowell Ahart, John Dittes 2011-6-20 17490 Lassen About 30 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  JEPS124052  Taraxacum officinale Lowell Ahart, John Dittes 2015-8-5 20432 Tehama East side of Childs Meadow, 150 yards west of Highway 36, 0.69 air-miles northwest of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.2 air-miles east of Doe Mountain, 9.77 air-miles south of Lassen Peak. Comment
  CHSC116982  Tauschia kelloggii Lowell Ahart 2016-6-4 20929 Butte On the west side of Ponderosa Way, about 1 mile (air) northwest of Sunset Hill, about 2 1/8 miles (air) northwest of Forbestown. 732 Comment
  SEINET10471602  Taxus brevifolia Lowell Ahart, Peter Ahart 1985-7-9 Ahart 5115 Butte About 1/2 mile west of Lumpkin Ridge Road, about 2 1/2 miles north-east of Camp 18, about 9 miles north-east of Feather Falls. Comment
  CHSC99107  Thlaspi arvense Lowell Ahart; John Dittes 2008-6-20 14961 Lassen Where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC41418  Thlaspi montanum var. montanum Lowell Ahart 1986-7-1 5334 Sierra 1/4 mile east of Johnsville Road, about 1/2 mile east of Lake Delahunty, about 8 miles north-east of La Porte. 1828 Comment
  CAS-BOT-BC88211  Thysanocarpus curvipes Lowell Ahart 1965-4-15 s.n. Butte Swedes Flat Road. 300 Comment
  SBBG128280  Thysanocarpus curvipes subsp. curvipes L. Ahart, J. Dittes 2009-3-20 15500 Butte open area along the Guardian Rock Trail, ca. 150 yards SW of the Ten Mi House Rd Trail, ca. 300 yards W of Hwy 32, W of the intersection of Hwy 32 and Ten Mi House Rd, upper Bidwell Park, ca. 10 mi NE of Chico 407 Comment
  JEPS119789  Thysanocarpus curvipes var. curvipes Lowell Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-10 18014 Butte South of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. Comment
  CHSC43453  Thysanocarpus curvipes var. elegans Lowell Ahart 1976-4-15 1079 Butte Near the bridge across Rocky Honcut Creek, along Swedes Flat Road, north-east of Bangor. 457 Comment
  CHSC111114  Torilis arvensis Lowell Ahart 2012-5-20 18091 Butte On the east side of the Humboldt trail, northeast of the Disc Golf Course, southeast part of Upper Bidwell Park, northwest of Chico. 365 Comment
  JEPS126558  Torilis arvensis Lowell Ahart 2016-5-24 20851 Butte About 150 yards south of La Porte Road, about 1/4 mile southwest of the intersection of La Porte Road and Loma Rica Road, about 3 1/4 miles (air) northeast of Honcut. Comment
  JEPS94684  Torilis arvensis Lowell Ahart 1998-7-1 8018 Butte about 7 air mi n Oroville (margins of seep sw of lone oak tree, w of cow chute on w side of Cherokee Rd.); North Table Mountain 403 Comment
  CDA31964  Torilis arvensis subsp. arvensis L. Ahart 2009-6-12 15837 Butte 10 yards north of the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 80 yards east of Cedar Grove, Lower Bidwell Park, Chico. Comment
  JEPS115375  Torilis arvensis subsp. arvensis Lowell Ahart 2009-6-3 15830 Butte Along a small stream, meadow, about 55 yards southeast of the gate, about 45 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  CDA42887  Torilis arvensis subsp. purpurea L. Ahart 2012-5-2 18091 Butte On the east side of the Humboldt Trail, northeast of the Disc Golf Course, southeast part of Upper Bidwell Park, northeast of Chico. Comment
  CHSC42476  Torilis arvensis subsp. purpurea Lowell Ahart 1987-5-27 5686 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS123988  Torilis arvensis subsp. purpurea Lowell Ahart 2015-5-9 20157 Sierra About 300 yards west of Highway 49, about one mile west of Indian Valley. Comment
  JEPS113705  Torreyochloa pallida var. pauciflora Lowell Ahart, John Dittes, Josephine Guardino 2007-8-10 14472 Plumas About 100 yards south of Beckwourth Gensee Road, there is a small quarry east of a poor road, the meadow and stream, about 2 miles (air) north of the north end of Lake Davis 1761 Comment
  CHSC112446  Toxicoscordion venenosum var. venenosum Lowell Ahart; Susan Kephart, Jim Kephart 2013-6-1 18721 Butte About 150 yards east of the intersection of Forbestown Road and Black Bart Road, about 3 1/4 miles (air) southwest of Forbestown. 737 Comment
  JEPS105945  Tragopogon dubius Lowell Ahart 2004-9-29 11408 Nevada Along Forest Road 41, about 1 northwest of Weaver Lake, about 2 miles (air) northwest of Bowman Lake, about 4 miles (air) northeast of Graniteville 1882 Comment
  CDA32022  Trichostema lanceolatum L. Ahart 2009-8-2 16287 Butte Near the rim edge, west edge of the open area west of the Guardian Rock Trail, about 100 yards north of Pine Trail, about 3/8 mile (air) southwest of the interesection of Ten Mile House Road and Highway 32, Upper Bidwell Park, about 10 miles northeast of Chico Comment
  CDA40996  Trichostema laxum L. Ahart 2003-8-11 10492 Tehama On the west side of road M2, about 9 miles west of Paskenta. Comment
  SBBG120016  Trichostema laxum L. Ahart 2006-8-9 13117 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  CHSC60991  Trichostema oblongum Lowell Ahart 1993-6-20 6983 Butte Jackass Flat, Mooreville Ridge, about 1 (air) mile north-west of the Lost Creek Reservoir Dam. 1158 Comment
  JEPS104431  Trichostema simulatum Lowell Ahart 2003-8-17 10514 Lassen On the w side of the paved road, on the e side of Highway 36, ca 1/4 mi sw of the Susan River, ca 8 mi (air) sw of Susanville. 1433 Comment
  JEPS122223  Trifolium Lowell Ahart 2014-4-20 19393 Butte About one mile northwest of the parking area on the west side of Cherokee Road, about 7 miles (air) north of Oroville. Comment
  CHSC94865  Trifolium albopurpureum var. dichotomum Lowell Ahart 2006-6-11 12702 Glenn 20 yards northwest of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles west-northwest of Stonyford. 595 Comment
  CHSC45926  Trifolium albopurpureum var. olivaceum Lowell Ahart 1981-4-6 2719 Sutter On a steep grassy hill, near Pass Road, on the south side of the South Butte, Sutter Buttes. 91 Comment
  CDA38822  Trifolium bifidum var. bifidum L. Ahart 2012-4-3 17924 Butte North of the meadow, southwest of Ten Mile House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico, south part of Upper Bidwell Park. Comment
  CHSC112218  Trifolium bifidum var. decipiens Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18631 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC43377  Trifolium bifidum var. decipiens Lowell Ahart 1979-4-25 1840 Tehama On a sand bar along Dibble Creek, about 1.5 miles north of Red Bluff. 91 Comment
  CHSC45924  Trifolium bifidum var. decipiens Lowell Ahart 1977-4-28 1333 Butte In a farmed field, Peter Ahart Ranch, about 2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC84336  Trifolium breweri Lowell Ahart 2003-8-17 10512 Butte Northeast of the buildings in Butte Creek House Meadow, about 3 miles northeast of Snag Lake, about 7 miles (air) east of Butte Meadows. 1771 Comment
  JEPS106188  Trifolium breweri Lowell Ahart, Josephine Guardino 2004-5-24 10940 Plumas On the east side of a logging road, about 200 yards south of a good dirt forest road, about 1/2 mile west of Squirrel Creek, about 1/8 mile north of the railroad, Greenhorn Creek, and Highway 70, about 7 miles (air) southeast of Quincy 1224 Comment
  JEPS115217  Trifolium breweri Lowell Ahart, John Dittes, Josephine Guardino 2009-7-22 16128 Plumas On the east side of Forest Service Road 27N92K, east side of Long Valley, about 3.5 miles (air) west-southwest of Greenville, about 5.2 miles (air) southeast of Lake Almanor Dam 1606 Comment
  JEPS121943  Trifolium breweri Lowell Ahart 2014-7-7 19600 Butte On the south side of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  JEPS95475  Trifolium breweri Lowell Ahart 1994-7-24 7511 Tehama 1 1/4 air miles N of Jonesville (E side of Willow Creek, 100 yds. N of the dirt road) 1615 Comment
  CHSC104853  Trifolium campestre Lowell Ahart 2010-6-9 16783 Butte About 50 yards west of the fence, about 1/4 mile south of the improved parking area and Cherokee Road, North Table Mountain, about 5 3/4 miles (air) northeast of Oroville. 405 Comment
  CHSC36234  Trifolium ciliolatum L. Ahart 1982-4-23 3327 Sutter On wooded e slope of ridge w of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  CHSC46159  Trifolium ciliolatum Lowell Ahart 1979-4-28 1850 Butte Along the banks of North Honcut Creek, Peter Ahart Ranch, about 1 1/4 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  CHSC50671  Trifolium ciliolatum Lowell Ahart 1990-4-8 6441 Butte On steep banks, on the east side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville. 33 Comment
  SEINET10452495  Trifolium ciliolatum Lowell Ahart 1985-4-24 Ahart 4885 Butte Along the steep sides of North Honcut Creek, Peter Ahart Ranch, about 1 and 1/4 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. Comment
  CHSC40428  Trifolium cyathiferum Lowell Ahart 1985-7-11 5140 Plumas Below the high water line of Little Grass Valley Reservoir, where Black Rock Creek flows into the lake, about 4 miles north-west of La Porte. 1584 Comment
  CHSC94328  Trifolium cyathiferum Lowell Ahart 2006-7-19 13018 Tehama In small depressions, open meadow area just west of the dirt road, east of Colby Creek, near large man-made piles of soil and rock, about 1 3/4 miles (air) southeast of Colby Mountain, about 4 3/4 miles (air) northeast of Butte Meadows. 1503 Comment
  JEPS113610  Trifolium cyathiferum Lowell Ahart, John Dittes 2007-6-16 14098 Plumas On damp gravelly soil, gravel bar along a small stream, on the south side of of County Road 111 (Beckwourth Gensee Road), 50 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis 1647 Comment
  CHSC101289  Trifolium depauperatum var. amplectens Lowell Ahart 2009-4-17 15541 Butte Along an old road, on the south slope of a ridge, about 150 yards west of Highway 32, near the south boundary, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 373 Comment
  CHSC111354  Trifolium depauperatum var. amplectens Lowell Ahart 2012-5-2 17949 Butte On damp dark clay soil, 20 yards south of the fence, west of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. 85 Comment
  JEPS119986  Trifolium depauperatum var. depauperatum Lowell Ahart 2012-4-30 17935 Butte On the west side of Guardian Trail about 300 yards north of Humboldt Trail, north of Bloody Pin Trail, about 1/8 mile west of Highway 32, about 8 miles northeast of Chico, south part of Upper Bidwell Park. Comment
  JEPS114593  Trifolium depauperatum var. truncatum Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14625 Merced Above the high margins of vernal pools, about 40 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced 53 Comment
  CHSC112310  Trifolium dichotomum Lowell Ahart 2013-5-1 18667 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  JEPS119706  Trifolium dubium Lowell Ahart 2012-5-2 17970 Butte West of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. Comment
  CHSC84097  Trifolium glomeratum Lowell Ahart; John Dittes 2003-5-12 10152 Shasta Near a marshy vernal pool, about 250 yards south of the barn, about 1/4 mile south of the Coleman Canal, 2.8 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 12 miles (air) east-northeast of Cottonwood. 265 Comment
  HSC93424  Trifolium glomeratum L. Ahart 1995-5-30 7578 Butte About 1/8 mi. N of Cherokee Rd., N Table Mountain, about 7 mi. N of Oroville 335 Comment
  JEPS107372  Trifolium glomeratum Lowell Ahart 2005-4-14 11702 Butte East of the railroad tracks, south of the railroad bridge, north of Spruce Street, Gridley 28 Comment
  CDA42992  Trifolium gracilentum var. gracilentum L. Ahart, John Dittes, Josephine Guardino 2008-4-11 14626 Merced About 40 yards southeast of the wire gate on the south side of Sandy Mush Road, 3.7 miles west of Highway 99, about 8.5 miles south-southeast of Merced. Comment
  CHSC111392  Trifolium hirtum Lowell Ahart 2012-5-2 17975 A Butte On damp soil, 20 yards south of the fence, west of the Government Pole Line, Upper Bidwell Park, about 3/4 mile east of Chico. 85 Comment
  CHSC117356  Trifolium hybridum Lowell Ahart; John Dittes 2016-7-14 21172 Modoc West side of a new pond, south of Ash Creek Canal (now filled in), south of Ash Creek, Ash Creek State Wildlife Area, 0.79 mile (air) south of County Road 87, 1.73 miles (air) west of Adin, Big Valley. 1273 Comment
  CHSC64541  Trifolium jokerstii Lowell Ahart; Ruth Gray Cunningham 1995-4-2 7569 Butte Small drainages on the north basalt rim of Beatson Hollow, about 1/10 mile south of the reservoir, on North Table Mountain, about 7 miles north of Oroville. 297 Comment
  CHSC83899  Trifolium jokerstii Lowell Ahart 2003-4-15 10096 Butte Edges of the vernal pool, about 200 feet north of the deep drainage that flows into Beatson Hollow, wet of Hendricks ditch, about 2 miles northwest of the iron gate and fence, northwest of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 266 Comment
  UCSC008285  Trifolium jokerstii Lowell Ahart 2012-5-4 17991 Butte About 1/2 mile southest of the lone pine tree on the rim of Beatson Hollow about 1-1/4 mile northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 302 Comment
  CHSC102384  Trifolium kingii var. productum Lowell Ahart; John Dittes, Josephine Guardino 2009-7-22 16127 Plumas On the east side of Forest Service Road 27N92K, east side of Long Valley, about 3.5 miles (air) west-southwest of Greenville, about 5.2 miles (air) southeast of Lake Almanor Dam. 1606 Comment
  CHSC112395  Trifolium longipes subsp. hansenii Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18775 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99303  Trifolium longipes subsp. hansenii Lowell Ahart; John Dittes 2008-6-20 14923 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS110419  Trifolium longipes subsp. hansenii Lowell Ahart 2006-7-11 12952 Tehama On the high east bank of Colby Creek, about 50 yards north of where the dirt road crosses Colby Creek, about 2 miles (air) southeast of Colby Mountain, about 5 miles (air) northeast of Butte Meadows 1518 Comment
  SEINET10452121  Trifolium longipes subsp. hansenii Lowell Ahart 1983-8-16 Ahart 4311 Butte T26N R4E section 32? On dry dark soil in a small mountain meadow, near Bull Hill Rd, ca. 3.5 mi south of Butte Meadows. Yellow Pine Forest; l600 m. 1600 Comment
  CHSC94693  Trifolium microcephalum Lowell Ahart 2006-6-11 12707 Glenn 20 yards northwest of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford. 595 Comment
  UCSC010315  Trifolium microcephalum Lowell Ahart 2016-6-4 20924 Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 air miles west of Forbestown. 388 Comment
  CHSC81026  Trifolium monanthum subsp. parvum Lowell Ahart 2001-8-14 9155 Nevada On the north side of Meadow Lake Road (Forest Road 18), north of the first set of three large culverts where the road crosses Jackson Creek, closest to the east end of Bowman Lake and west of the major campgrounds and buildings. 1706 Comment
  JEPS110072  Trifolium obtusiflorum Lowell Ahart 2006-6-11 12708 Glenn 20 yards northwest of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Campground, about 5 1/4 miles west-northwest of Stonyford 595 Comment
  UCSC011130  Trifolium obtusiflorum Lowell Ahart 2006-8-9 13130 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCSC011129  Trifolium obtusiflorum Lowell Ahart 2003-9-7 10555 Plumas North side of the road, on Hartman Bar Ridge, about 1 air mile southwest of Franklin Hill, about 3 1/2 air miles northwest of Tamarack Flat, about 6 air miles northwest of Little Grass Valley Reservoir Dam. 1524 Comment
  CHSC108998  Trifolium oliganthum Lowell Ahart 2012-4-30 17938 Butte On both sides of Guardian Trail, about 400 yards north of Humboldt Trail, north of Bloody Pin Trail, about 1/8 mile west of Highway 32, about 8 miles northeast of Chico, south part of Upper Bidwell Park. 365 Comment
  CHSC68309  Trifolium oliganthum Lowell Ahart 1997-3-29 7715 Butte East slope, about 100 yards west of North Honcut Creek, about 1 1/2 miles north and 2 1/2 miles east of Honcut, about 12 (air) miles southeast of Oroville. 60 Comment
  JEPS107728  Trifolium productum Lowell Ahart, John Dittes 2005-10-19 12417 Plumas Along the west side of a good dirt road, about 1 1/4 miles east of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake 1998 Comment
  SEINET10451927  Trifolium productum Lowell Ahart, Peter Ahart 1983-8-17 Ahart 4320 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. Red Fir Forest; 2000 m. 2000 Comment
  JEPS115321  Trifolium retusum Lowell Ahart 2009-5-8 15660 Butte On the south side of the gravel road, about 10 yards east of Cedar Grove Parking Area in Lower Bidwell Park, Chico 67 Comment
  CHSC82322  Trifolium striatum Lowell Ahart 2002-5-4 9583 Nevada About 15 yards south of Perimeter Road, about 30 yards east of the private driveway, about 2.8 miles east of the intersection of Perimeter Road and White Oak Drive, about 5 miles (air) east of Camp Far West Dam, about 1 1/2 miles (air) southeast of Rock Mountain. 243 Comment
  CHSC45928  Trifolium subterraneum Lowell Ahart 1977-5-17 1369 Butte In a farmed field, Peter Ahart Ranch, about 2 miles north and 1 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC117288  Trifolium ultramontanum Lowell Ahart; John Dittes 2016-7-15 21233 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, .4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  JEPS113410  Trifolium variegatum Lowell Ahart 2007-5-12 13795 Yuba Bottom of a swale, about 100 yards southwest of the second power tower, about 300 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 28 Comment
  JEPS115295  Trifolium variegatum Lowell Ahart 2009-4-17 15543 Butte On the south slope of a ridge, about 150 yards west of Highway 32, near the south boundary, Upper Bidwell Park, about 5 miles (air) northeast of Chico 373 Comment
  CHSC116204  Trifolium variegatum var. geminiflorum Lowell Ahart 2015-7-4 20271 Plumas About 100 yards south of the paved road to Tamarack Flat, about 1/2 mile west of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, about 1 1/2 miles (air) northwest of Little Grass Valley Reservoir dam. 1712 Comment
  CHSC96797  Trifolium willdenovii Lowell Ahart 2007-4-30 13710 Butte On the north side of Jordan Hill Road, about 2 miles northwest of Concow Creek, about 2 miles northwest of Concow Reservoir. 484 Comment
  JEPS115813  Trifolium willdenovii Lowell Ahart 2009-4-26 15630 Butte About 10 miles northeast of Chico, Upper Bidwell Park, about 1/2 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road. On the south side of Ten Mile House Road 311 Comment
  JEPS94810  Trifolium willdenovii Lowell Ahart 1998-4-8 7948 Butte 1/4 mi ne of Oroville (w of dirt road, 1/10 mi n of the Thermalito Diversion Dam, e of the Thermalito Diversion Pool) 67 Comment
  RSA713005  Trifolium willdenovii L. Ahart 2006-5-8 12609 Butte North of Phantom Falls, about 3/4 mile northwest of the parking area, cow chute, and Cherokee Road North Table Mountain, about 7 miles (air) north of Oroville. 384 Comment
  HSC102796  Trifolium wormskioldii L. Ahart 2008-8-13 15185 Plumas About 1.75 air miles S of Little Grass Valley Reservoir, ~1.0 mi. NE of La Porte, west of East Branch Creek, on the western side of La Porte Rd. 1614 Comment
  JEPS113417  Trifolium wormskioldii Lowell Ahart, Josephine Guardino 2007-7-21 14355 Plumas Along a small stream, near a spring, open dry flat, south of the dirt road, about 1/2 mile (air) south of Bagley Pass, about 400 yards north of Lake Davis 1787 Comment
  UC1609276  Trifolium wormskioldii Lowell Ahart 1993-7-22 7084 Butte w of the bridge across Fall River; ca 6 air mi ne of Feather Falls 1036 Comment
  JEPS98583  Triodanis biflora Lowell Ahart 2000-5-13 8344 Butte 5 air miles SW of Oroville (margin of the Thermalito Afterbay, S side of access road to the boat ramp, W of Larkin Road, 1 1/4 mi S of the Oroville Airport) 42 Comment
  CHSC47398  Triodanis perfoliata Lowell Ahart 1980-5-1 2146 Sutter East of the old homestead, on the south side of the South Butte, Sutter Buttes. 365 Comment
  CHSC46410  Triphysaria pusilla Lowell Ahart 1989-5-6 6205 Butte Growing along the edges of a dirt road, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CAS-BOT-BC199589  Trisetum canescens Lowell Ahart 1987-7-8 5794 Butte Along Big Bar Mountain Road, about 3 miles south-west of Coyote Gap, south-east of Pulga 1280 Comment
  CHSC42931  Trisetum canescens Lowell Ahart 1987-7-3 5750 Butte Along the edge of Poe Power House Road, about 1 mile north-west of the Poe Power House, about 1 mile south-east of Jarbo Gap. 487 Comment
  CHSC44917  Trisetum canescens Lowell Ahart 1988-7-31 6151 Butte On the east side of the Feather River, north of the bridge, about 4 road miles north of Stirling City. 914 Comment
  CHSC61379  Trisetum canescens Lowell Ahart 1993-7-22 7074 Butte On the west side of the dirt road, about 1/2 mile north-west of Camp 18, about 5 1/2 miles (air) north-east of Feather Falls. 1097 Comment
  JEPS113264  Trisetum canescens Lowell Ahart 2007-5-22 13916 Butte About 1/8 mile south of Bald Rock Dome, along the Dome Trail, trail leads to the Middle Fork of the Feather River, about a mile from the trail head which is 3/10 mile east of Bean Creek Road, about 2 miles (air) northeast of Big Bald Rock, about 16 miles 844 Comment
  CHSC101140  Triteleia bridgesii Lowell Ahart 2009-5-15 15707 Butte On the east side of Big Chico Creek, on the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 234 Comment
  JEPS95483  Triteleia bridgesii Lowell Ahart 1994-6-5 7294 Yuba 3 air miles E of Forbestown (N side of Costa Creek, N side of Forbestown Road) 853 Comment
  SEINET10472655  Triteleia hyacinthina Lowell Ahart 1985-5-5 Ahart 4909 Sutter Dean Ranch about 3 1/4 miles north-west of Sutter, Sutter Buttes. Comment
  CHSC44436  Triteleia ixioides subsp. scabra Lowell Ahart 1988-6-29 6107 Butte At the intersection of Bean Creek Road and the road to the Andy Smith Ranch, about 1 1/2 miles south-east of Little Bald Rock. 914 Comment
  CHSC36281  Triteleia laxa L. Ahart 1982-4-23 3308 Sutter W of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  SD149198  Triticum aestivum Lowell Ahart 1980-6-1 2366 Butte South of Dry Creek, near Clark Road. 99 Comment
  SEINET10929567  Typha latifolia Lowell Ahart 1984-8-5 Ahart 4779 Sierra On damp bare yellow silt on the bottom of the Poverty Hill Mine (hydraulic mine), about 10 miles north-east of Strawberry Valley (Yuba County), east of Diamond Springs, about 4 miles south of La Porte (Plumas County). Comment
  RSA754847  Umbellularia californica L. Ahart 2009-8-20 16286 Butte near rim edge, west edge of the open area west of the Guardian Rock Trail, about 30-100 yards north of Pine Trail, about 3/8 air mile southwest of the intersection of Ten Mile House Road and Highway 32, Upper Bidwell park;, about 10 miles northeast of Chico. 399 Comment
  CHSC46962  Uropappus lindleyi Lowell Ahart 1979-4-19 1830 Butte Along the edges of North Honcut Creek, Peter Ahart Ranch, about 1 1/4 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  UC1562419  Uropappus lindleyi Lowell Ahart 1990-6-16 6508 Butte on the s side Forbestown Reservoir (just s of the Forbestown Generator) 487 Comment
  CHSC34116  Urtica dioica subsp. holosericea L. Ahart 1981-9-10 3134 Sutter Along the edge of a small stream, near the old homestead, s side of South Butte, Sutter Buttes. 450 Comment
  CHSC96506  Urtica urens Lowell Ahart; Brian Williams 2007-4-13 13656 Placer On damp granite soil, under a large blue oak tree, about 1/8 mile northeast of GPS location, open pasture fields, about 1/2 mile south of the Manzanita Cemetery, about 1/2 mile west of Gladding Road, about 2 3/4 miles north of Lincoln. 43 Comment
  CAS-BOT-BC193391  Vaccinium shastense subsp. nevadense Lowell Ahart 1983-7-29 4221 Butte Along the dirt road about 2 miles south of Milsap Bar, about 23 miles north-east of Oroville 750 Comment
  CHSC75821  Valeriana californica Lowell Ahart; Vernon H. Oswald 1999-7-26 8119 Nevada Near the edge of Grouse Ridge Road (Road 14) and about 1/2 mile southwest of the Lookout, about 5 1/2 miles northeast of Bowman Lake Road (Road 18), about 4 1/2 miles (air) south of Bowman Lake. 2133 Comment
  CHSC88002  Valeriana californica Lowell Ahart; John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11178 Plumas On the south side of a forest road, about 1/4 mile north of Taylor rock, about 1 mile (air) southwest of Grizzly Peak, about 5 miles (air) south of Taylorsville, about 8 miles (air) northeast of Quincy. 2053 Comment
  CHSC43410  Velezia rigida Lowell Ahart 1979-5-29 1899 Butte Along the edges of a small wash, east of Kunkle Creek, about 2 1/2 miles south-east of Paradise. 487 Comment
  CAS-BOT-BC391337  Velezia rigida Lowell Ahart 1983-6-30 4175 Butte Along old Highway 40, north of the water fountain, about 3 1/2 miles south of Jarbo Gap 350 Comment
  JEPS115552  Verbascum thapsus Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16236 Plumas On dry to damp bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam 1591 Comment
  CHSC116009  Verbascum virgatum Lowell Ahart 2015-10-9 20545 Butte West edge of Bull Hill Road, about 3/4 mile northwest of the intersection of Bull Hill Road, Skyway, and Humbug Road, about 4 miles (air) north of Inskip. 1697 Comment
  SEINET10547125  Verbena lasiostachys Lowell Ahart 1984-9-22 Ahart 4809 Sutter Vicinity of South Butte, Sutter Buttes; west of Marysville. Valley Grassland and Foothill Woodland; 70 to 440 m in elev. 70 Comment
  JEPS87155  Verbena lasiostachys var. lasiostachys Lowell Ahart 1992-8-2 6909 Butte 1/2 mi n Flea Valley (ca. 4 1/2 mi (air) ne of Concow Reservoir, e of intersection) 1158 Comment
  CHSC104806  Verbena tenuisecta Lowell Ahart 2010-6-1 16765 Butte On damp good soil, irrigated, near sign, at the corner of Centennial Avenue and Chico Canyon Road, Chico. 92 Comment
  CHSC34159  Veronica americana L. Ahart 1981-8-31 3054 Butte Near the Black Bart Rd, ca. 1 mi w of jct of Black Bart Rd and Oroville-Forbestown Rd, w of Forbestown. 750 Comment
  CHSC111106  Veronica anagallis-aquatica Lowell Ahart; John Dittes 2012-7-12 18361 Modoc North edge of Ash creek, south of the gravel pit, about 1/8 mile east of the parking area on the east side of Elkins Lane, Ash Creek State Wildlife Area, about 4 miles (air) west of Adin, about 8 miles (air) northeast of Bieber. 1266 Comment
  CHSC112666  Veronica anagallis-aquatica Lowell Ahart 2013-10-19 19154 Glenn Under branches of large trees, on the west side of the backwater, along the west side of the Sacramento River, about 300 yards north of the bridge, west of Butte City. 26 Comment
  CHSC113363  Veronica anagallis-aquatica Lowell Ahart 2014-4-25 19401 Butte Sides of a cleaned ditch, on the west side of Richvale South Highway, south of the intersection of Richvale West Road and Richvale South Highway, Richvale. 30 Comment
  CHSC42867  Veronica anagallis-aquatica Lowell Ahart 1987-5-6 5541 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2miles south-east of Jarbo Gap, 271 Comment
  JEPS95985  Veronica anagallis-aquatica Lowell Ahart 1999-10-28 8299 Butte large disturbed area along the east side of the Sacramento River; northwest of Parrott Landing; about 1 mile southeast of Ord Ferry; about 2 miles southeast of Ordbend; about 12 miles (air) southwest of Chico 32 Comment
  JEPS123913  Veronica arvensis Lowell Ahart 2015-4-27 20084 Butte About 5/8 mile northwest of the iron gate along Cherokee Road, Beatson Hollow, North Table Mountain, about 7 miles (air) north of Oroville. Comment
  CHSC94481  Veronica catenata Lowell Ahart 2006-8-9 13127 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94845  Veronica catenata Lowell Ahart 2006-10-8 13417 Plumas On the east bank of Chips Creek, southeast of the bridge on Highway 70, on the north side of the North Fork of the Feather River, about 1 1/4 miles southwest of Belden. 715 Comment
  JEPS110122  Veronica catenata Lowell Ahart 2006-9-28 13376 Butte On the east side of the North Fork of the Feather River, on the west side of Highway 70, about 50 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel 445 Comment
  CHSC23867  Veronica cusickii Lowell Ahart 1976-7-30 1183 Sierra N side of Mt. Fillmore, ca. 10 mi ne of La Porte. 1981 Comment
  CHSC113295  Veronica peregrina subsp. xalapensis Lowell Ahart 2014-4-9 19327 Butte Rice field, near the pump, on the north side of Colusa Highway, about 4/10 of a mile east of the intersection of Pennington Road and Colusa Highway, about 5 1/2 miles west of Gridley. 22 Comment
  CHSC81825  Veronica peregrina subsp. xalapensis Lowell Ahart 2001-10-10 9362 Placer French Meadows Reservoir, about 1/4 mile northeast of the boat or trail access area on the northwest side of the reservoir, about 3/4 mile southwest of the bridge across the Middle Fork of the American River, about 1 3/4 miles southwest of Ahart Camp, about 22 miles (air) northeast of Forest Hill. 1591 Comment
  JEPS114715  Veronica peregrina subsp. xalapensis Lowell Ahart 2008-5-21 14784 Butte Dry bare granite soil, below the high water line of Lake Oroville, on the north and south side of the South Fork of the Feather River, about 100 yards west of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile northwest of the P 246 Comment
  RSA715953  Veronica peregrina subsp. xalapensis L. Ahart, John Dittes 2005-6-10 12059 Siskiyou Near a poor dirt road, about 80 yards north of the pump house along the Shasta River, about 1.9 miles (air) south of Hwy 99/97 Cutoff, about 6 miles (air) ESE of Grenada. 777 Comment
  CHSC42533  Vicia americana var. americana Lowell Ahart 1987-5-22 5660 Butte South of the lava cap, about 1/4 mile south of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls. 1280 Comment
  CHSC99237  Vicia americana var. americana Lowell Ahart; John Dittes 2008-6-19 14839 Shasta About 5 yards east of the Pit River, about 150 yards southwest of the intersection of Cassel-Fall River Road and Dee-Knoch Road, about 1/4 mile southeast of Highway 299 in Fall River Mills. 993 Comment
  JEPS103300  Vicia benghalensis Lowell Ahart 2002-5-7 9624 Butte High banks of a pond, at the beginning of a SE branch of Schirmer Ravine, ca 50 yards E of the pond on the E side of Cherokee Road, North Table Mountain, ca 4 miles (air) N of Oroville. 228 Comment
  JEPS119749  Vicia sativa subsp. nigra Lowell Ahart 2012-5-17 18080 Butte North of Big Chico Creek, on both sides of the horse trail, east of Table 20, southwest of the southwest corner of the old walnut orchard, about 3/5 mile west of Peterson Drive, Lower Bidwell Park, Chico. Comment
  CHSC46377  Vicia villosa subsp. varia Lowell Ahart 1989-5-10 6213 Butte About 1/10 mile north-west of the West Branch Bridge across Lake Oroville, near Lake Oroville. 289 Comment
  CHSC108982  Vinca major Lowell Ahart 2012-4-30 17925 Butte 20 yards north of the table at the old homestead, about 20 yards north of the table at the old homestead, about 20 yards southeast of the intersection of South Rim Trail and Ten Mile House Road, about 5/8 mile west of Highway 32, about 9 miles (air) northeast of Chico, south part of Upper Bidwell Park. 250 Comment
  JEPS127036  Viola glabella Lowell Ahart 2016-6-2 20910 Plumas About 30 yards south of the paved road to Tamarack Flat, about 1/2 mile west of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, about 1 1/2 miles (air) northwest of Little Grass Valley Reservoir Dam. Comment
  CHSC11086  Viola lobata subsp. integrifolia Lowell Ahart 1968-5-15 Yuba Near Bullard's Bar Dam. 914 Comment
  CHSC108819  Viola odorata Lowell Ahart; John Dittes, Josephine Guardino 2012-4-6 17811 Butte On the north side of Big Chico Creek, Lost Park in Bidwell Park, city of Chico. 60 Comment
  CHSC12402  Vitis californica Lowell Ahart 1973-5-24 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC84300  Vitis californica Lowell Ahart; John Dittes 2003-6-11 10281 Tehama On the west side of Battle Creek, about 1 mile north of Manton Road, about 1 1/2 miles (air) northeast of the Colman Power House, about 5 miles (air) west-southwest of Darah Springs State Fish Hatchery, about 10 miles (air) east-northeast of Cottonwood. 153 Comment
  JEPS110458  Vitis californica Lowell Ahart 2006-6-15 12766 Glenn On the west side of the creek, about 50 yards north of the ford across Stony Creek (Forest Road 18N03), about 2 miles (air) northeast of the North Fork Camprground, about 5 1/4 miles (air) west-northwest of Stonyford 597 Comment
  CHSC36544  Vulpia microstachys L. Ahart 1982-6-4 3546 Butte Lava cap, 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 1000 Comment
  CAS-BOT-BC278404  Vulpia microstachys var. ciliata Lowell Ahart 1983-5-14 4015 Sutter Along West Butte Road, ca. 1/8 mi. S of the Sacramento Outing Club, Sutter Buttes 50 Comment
  CHSC103973  Vulpia microstachys var. ciliata Lowell Ahart 2010-5-7 16608 Butte Near area of erosion control, disk golf area, on a ridge about 200 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 369 Comment
  CHSC96634  Vulpia microstachys var. ciliata Lowell Ahart; John Dittes, Josephine Guardino 2007-4-3 13625 Tehama On the east side of Brush Creek (a north branch), about 4 miles (air) northeast of the intersection of Highway 99 East and Vina Road, about 7 miles (air) southeast of Los Molinos. 112 Comment
  SEINET3450756  Vulpia microstachys var. ciliata Lowell Ahart, John Dittes 2003-5-12 10170 Shasta Cottonwood, Cottonwood, about 12 air miles east /northeast, about 2.8 air miles south/southwest of the Darah Springs State Fish Hatchery, about 0.25 miles south of the Coleman Canal, about 250 yards south of the barn 260 Comment
  CHSC96638  Vulpia microstachys var. microstachys Lowell Ahart; John Dittes, Josephine Guardino 2007-4-3 13626 Tehama On the east side of Brush Creek (a north branch), about 4 miles (air) northeast of the intersection of Highway 99 East and Vina Road, about 7 miles (air) southeast of Los Molinos. 112 Comment
  CHSC93453  Vulpia microstachys var. pauciflora Lowell Ahart 2006-5-10 12620 Butte Road cut bank, on the north side of the poor dirt road, Bardees Bar Road, about 100 yards north of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 1/2 miles (air) southwest of Pulga. 354 Comment
  JEPS107303  Vulpia microstachys var. pauciflora Lowell Ahart, John Dittes 2005-6-1 11876 Lassen On the south side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 1 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, about 3.7 miles (air) northwest of Hallelujah Junction 1461 Comment
  CAS-BOT-BC184699  Vulpia myuros subsp. megalura Lowell Ahart 1987-5-6 5567 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap 271 Comment
  CHSC90804  Vulpia myuros var. hirsuta Lowell Ahart 2005-4-14 11708 Butte At the base of the railroad roadbed, east side of the railroad tracks, south of the railroad bridge, north of Spruce Street, Gridley. 28 Comment
  JEPS110444  Vulpia myuros var. hirsuta Lowell Ahart 2005-12-11 12522 Butte On the sides of small ditches, on the Rice Experiment Station, between the Main Ditch and Stine Lateral, on the north side of Hamilton Road, about 1/4 mile east of Riceton Highway, about 2 1/4 miles (air) east of Biggs 30 Comment
  CHSC82378  Vulpia myuros var. myuros Lowell Ahart 2002-6-2 9678 Butte In a meadow, southwest of the intersection of Black Bart Road and Forbestown Road, about 3 miles (air) southwest of Forbestown. 670 Comment
  SEINET10663223  Vulpia myuros var. myuros Lowell Ahart 2007-4-17 Ahart 13691 Yuba T17N, R5E, northeast 1/4 Section 13. On the north side of the poor dirt fireguard, about 100 yards northwest of Marysville Road and the Parking Area, Daugherty Hill Wildlife Area, Donovan Hil Management Area, about 5.5 miles (air) northeast of Loma Rica. 293 Comment
  CHSC91179  Vulpia octoflora Lowell Ahart; John Dittes 2005-6-1 11875 Lassen On the south side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 1 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.7 miles (air) northwest of Hallelujah Junction. 1461 Comment
  JEPS104150  Woodsia scopulina Lowell Ahart 2003-10-17 10644 Plumas Cliffs ne of Humboldt Peak, ca 3/4 mi e of Humboldt Summit, ca 8 mi (air) ne of Butte Meadows. 2103 Comment
  CHSC102407  Woodwardia fimbriata Lowell Ahart 2009-8-23 16295 Butte On damp soil, along a small flowing stream, about 20 yards south of the fence, about 150 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 242 Comment
  RSA755331  Woodwardia fimbriata L. Ahart 2009-6-30 15975 Butte Along a small flowing stream about 20 yards south of the fence, about 150 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 air mile west of Highway 32, about 10 miles northeast of Chico. 242 Comment
  CAS-BOT-BC382894  Wyethia angustifolia Lowell Ahart 1987-5-22 5669 Butte About 1/8 mile south-east of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls 1280 Comment
  RSA0036430  Wyethia angustifolia Lowell A. Ahart 2012-5-20 18090 Butte On the east side of the Humboldt Trail, northeast of the Disc Golf Course, southeast part of Upper Bidwell Park, northeast of Chico. 366 Comment
  JEPS113782  Wyethia mollis Lowell Ahart, John Dittes, Josephine Guardino 2007-6-8 14011 Plumas East side of an open rocky flat, 20 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis 1965 Comment
  UCD169663  Xanthium spinosum Lowell Ahart 2011-7-30 17619 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles (air) south of Oroville. 33 Comment
  CHSC76412  Xanthium strumarium Lowell Ahart 1999-10-28 8313 Butte On the west side of a large pond, area along the east side of the Sacramento River, northwest of Parrot Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  UCD137162  Xanthium strumarium L. Ahart 1982-9-9 3773 Sutter ca. 1/8 mile south of Myers home, Myers Ranch, Sutter Buttes. Comment
  CDA38552  Yabea microcarpa L. Ahart 2006-5-5 12571 Tehama Along the Nomalaki Trail (Thomes Gorge Trail), about 1/2 mile northwest of Forest Road 23N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta. Comment
  SEINET10906784  Yabea microcarpa Lowell Ahart 1984-5-21 Ahart 4643 Sutter On South Butte, Sutter Buttes, west of Marysville; Foothill Woodland; 675 m. 675 Comment
  CHSC117292  Zeltnera exaltata Lowell Ahart; John Dittes 2016-7-13 21121 Lassen West edge of the pond, 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  RSA0036429  Zeltnera muehlenbergii Lowell A. Ahart 2012-5-20 18097 Butte On the south side of the Humboldt Trail, about 100 yards east of the Guardian Trail, southeast part of Upper Bidwell Park, northeast of Chico. 370 Comment
  CHSC104849  Zeltnera venusta Lowell Ahart 2010-6-9 16781 Butte About 50 yards south of the poor dirt road, about 120 yards east of the fence, about 170 yards east of where you park, southeast of Cherokee Road, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 393 Comment



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