Search Results — 2000 specimen records retrieved (1790 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
  CAS-BOT-BC73553  Abies concolor Lowell Ahart 1984-9-26 4812 Butte South Fork of the Feather River, near the new bridge, about 1 mile north of Goldn Trout Crossing, 700 Comment
  CHSC81795  Abutilon theophrasti Lowell Ahart 2001-11-2 9400 Yuba Camp Far West Reservoir, about 1/4 mile northeast of the dam, about 9 miles (air) southeast of Wheatland. 83 Comment
  RSA691017  Acacia dealbata L. Ahart 2003-4-30 10118 Butte On the east side of Upper Palermo Road, about 2 miles (air) northeast of Palermo. 67 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
  CHSC44840  Achillea millefolium Lowell Ahart 1977-8-2 1529 Sierra On the west side of Mount Fillmore, near the summit, about 12 air miles north-east of La Porte, Sierra County, California. 2194 Comment
  JEPS108936  Achillea millefolium Lowell Ahart 2006-9-9 13248 Tehama Open dry meadow area west of the dirt road, just east of Colby Creek, south of the 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
  CAS-BOT-BC210643  Achnatherum lemmonii Lowell Ahart 1977-6-13 s.n. Butte Peter Ahart Ranch, Honcut 50 Comment
  CHSC100351  Achnatherum lemmonii Lowell Ahart 2008-7-18 15117 Nevada Along the P. G. and E. water ditch at the 3 1/4 mile mark, about one mile southwest of Highway 2o (by ditch), about 1/2 mile south of Bear Valley. 1744 Comment
  CHSC94139  Achnatherum lemmonii Lowell Ahart 2006-6-28 12883 Sierra On the south slope and near the top of the serpentine area, about 3/4 mile (air) east of Lake Delahunty, about 2 miles (air) northeast of Gibsonville. 1903 Comment
  CHSC94293  Achnatherum lemmonii Lowell Ahart 2006-7-19 13014 Tehama Meadow area west of the dirt road, just 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
  JEPS98979  Achnatherum lemmonii Lowell Ahart 2001-6-8 8797 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  CHSC59059  Achnatherum occidentale subsp. californicum Lowell Ahart 1992-7-26 6843 Butte About 1/2 mile north of the Carr Mine, about 2 (air) miles south of Snow Mountain. 1767 Comment
  CHSC69118  Achnatherum occidentale subsp. occidentale Lowell Ahart 1997-8-1 7790 Butte East of Little Kimshew Creek, east of Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 Comment
  CAS-BOT-BC218049  Achnatherum stillmanii Lowell Ahart 1981-8-15 3028 Butte Along road about 2 miles S of Inskip 1400 Comment
  CHSC31423  Achnatherum stillmanii L. Ahart 1980-9-10 2626 Butte Ca. 1/10 mi e of Little Bald Rock, ne of Oroville. 335 Comment
  CHSC41396  Achyrachaena mollis Lowell Ahart 1986-5-4 5258 Sutter South of the dirt road, a little west of 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
  HSC104027  Achyrachaena mollis L. Ahart, John Dittes, Josephine Guardino 2008-4-12 14669 Merced About 8.5 mi. SSE of Merced, 3.7 mi. W of Hwy. 99; ~ 0.5 mi. S of the wire gate of the south side of Sandy Mush Road. 53 Comment
  SEINET3450924  Achyrachaena mollis Lowell Ahart, John Dittes 2003-5-12 10130 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
  CAS-BOT-BC29950  Achyrachaena mollis Lowell Ahart 1980-5-4 2154 Butte near Thermalito 19 Comment
  CHSC10653  Acmispon americanus var. americanus Lowell Ahart 1968-5-21 Butte West of Magalia. 304 Comment
  CHSC110921  Acmispon americanus var. americanus Lowell Ahart 2012-7-28 18407 Nevada About 10 yards west of the Pioneer Trail, about 150 yards northeast of the PG and E Pavilion and restrooms, on the east side of Bowman Lake Road, north of the bridge acrossf the Bear River, Bear Valley. 1433 Comment
  CHSC111102  Acmispon americanus var. americanus Lowell Ahart; John Dittes 2010-7-12 18354 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
  CHSC37260  Acmispon americanus var. americanus L. Ahart 1982-6-15 3578 Butte Ca. 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 1000 Comment
  CHSC94284  Acmispon americanus var. americanus Lowell Ahart 2006-8-9 13112 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS119559  Acmispon americanus var. americanus Lowell Ahart, John Dittes 2012-7-12 18354 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 Valley. Comment
  SBBG128893  Acmispon americanus var. americanus L. Ahart 2008-8-25 15302 Modoc W bank (flood plane) of the Pit River, ca. 1/8 mi E of County Rd 91, ca. 3.8 mi (air) NNE of Lookout 1273 Comment
  CAS-BOT-BC213420  Acmispon argophyllus var. argophyllus Lowell Ahart 1983-10-11 4466 Sierra Near Ahart Sheep Camp, Milton Res., 3 miles north-west of Jackson Meadow Reservoir. 1800 Comment
  CHSC90811  Acmispon brachycarpus Lowell Ahart 2005-5-2 11783 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
  JEPS119579  Acmispon brachycarpus Lowell Ahart 2012-4-17 17878 Butte About 200 yards southeast of where the road turns north, about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 5 miles (air) southwest of Oroville. Comment
  CHSC88171  Acmispon nevadensis var. nevadensis Lowell Ahart 2004-7-17 11256 Nevada Near a small stream, very upper reaches of Steephollow Creek, about 20 yards east of Highway 20, about 150 yards southeast 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
  CHSC50039  Acmispon parviflorus Lowell Ahart 1990-4-8 6439 Butte On the east side of Pacific Heights Road, about 3-1/2 miles southwest of Oroville. 33 Comment
  CHSC98960  Acmispon parviflorus Lowell Ahart 2008-5-12 14733 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 40 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
  CAS-BOT-BC418784  Aconogonon phytolaccifolium Lowell Ahart 1985-7-9 5118 Butte Along Fall River, about 100 yards south of the bridge across Fall River, 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 914 Comment
  CHSC108460  Aconogonon phytolaccifolium Lowell Ahart 2011-9-17 17664 Plumas On the south side of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 20 yards west of the paved road, about 1/8 mile west of Little Grass Valley Reservoir. 1595 Comment
  JEPS108865  Adenocaulon bicolor Lowell Ahart 2006-7-25 13053 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
  CHSC11327  Adiantum aleuticum Lowell Ahart 1966-9-18 Sierra Along Goodyear's Bar Road. 1219 Comment
  CHSC30851  Adiantum capillus-veneris L. Ahart 1980-9-10 2628 Butte Ca. 1 mi ne of Millsap Bar, ca. 25 mi ne of Oroville. 900 Comment
  CHSC112264  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa Inner North Coast Range. On the south side of the wash, 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
  JEPS121107  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa On thesouth side of the wash, N side of 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
  CAS-BOT-BC110725  Aegilops triuncialis Lowell Ahart 1976-5-2 s.n. Butte Peter Ahart Ranch. Honcut. Comment
  SEINET10494491  Aesculus californica Lowell Ahart, Peter Ahart 1983-6-26 Ahart 4112 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
  CHSC117651  Agastache urticifolia Lowell Ahart 2016-8-30 21323 Plumas On the east 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
  RSA724886  Agoseris glauca var. dasycephala L. Ahart 2006-8-15 13201 Tehama East of Colby Creek, west of poor dirt road, about 3/4 mile northwest of the Snowmoblie Area, about 1.25 miles (air) northwest of Jonesville, about 4.75 miles (air) northeast of Butte Meadows. 1504 Comment
  JEPS107720  Agoseris grandiflora Lowell Ahart, John Dittes 2005-9-19 12421 Plumas On damp disturbed soil, 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
  CAS-BOT-BC22964  Agoseris heterophylla Lowell Ahart 1982-6-4 3542 Butte 1 1/2 miles east of Camp 18, about 8 miles east of Feather Falls 1000 Comment
  CAS-BOT-BC22965  Agoseris heterophylla Lowell Ahart 1980-5-4 2209 Butte Near Hurleton 600 Comment
  CHSC97627  Agoseris heterophylla Lowell Ahart; John Dittes 2007-6-16 14099 Plumas On dry soil, 100 yards east of 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
  JEPS93835  Agoseris heterophylla Lowell Ahart 1998-7-1 8024 Butte about 7 air mi n of Oroville (about 1/2 mi n of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain, Cherokee Road 403 Comment
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Jan 19 2011
  JEPS107468  Agoseris monticola Lowell 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 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  CHSC97118  Agrimonia gryposepala Lowell Ahart 2007-8-7 14424 Yuba West side of an open meadow, on the southeast part of Hampshire Creek Meadow, about 50 yards east of the dirt road, about 1 mile (air) east of Clipper Mills. 1021 Comment
  JEPS107740  Agrostis avenacea Lowell Ahart, Jack Lindsay 2005-5-31 11838 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
  CHSC41912  Agrostis elliottiana Lowell Ahart 1983-6-26 4166 Butte Near Bean Creek Road, about 1/4 mile south of Little Bald Rock, about 20 miles north-east of Oroville. 1000 Comment
  CHSC90993  Agrostis elliottiana Lowell Ahart 2005-5-11 11800 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
  CHSC69732  Agrostis exarata Lowell Ahart 1997-10-20 7919 Butte 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
  CHSC80712  Agrostis exarata Lowell Ahart 2001-6-8 8798 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  UC1563282  Agrostis exarata Lowell Ahart 1990-9-30 6608 Butte about 1/8 mi ne Canyon Creek Bridge across Lake Oroville (below the high water line of Lake Oroville); Lake Oroville, East Fork of Canyon Creek 243 Comment
  UC1594714  Agrostis exarata Lowell Ahart 1992-8-2 6907 Butte about 3 (air) mi ne Concow Reservoir; Concow Meadow 1097 Comment
  SEINET10507080  Agrostis exarata Lowell Ahart 1983-8-16 Ahart 4290 Butte T26N R4E nw section 28. Along a small stream that flows into Butte Creek, ca. 1 mi east of Butte Meadows. Yellow Pine Forest; 1450 m. 1450 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
  JEPS121947  Agrostis idahoensis Lowell Ahart 2014-7-7 19587 Butte In the bog, Coon Hollow, about 2 miles (air) north of Philbrook Reservoir. Comment
  CAS-BOT-BC138852  Agrostis microphylla Lowell Ahart 1988-5-28 6007 Butte Peter Ahart Ranch, about 1.5 mile north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC113240  Agrostis microphylla Lowell Ahart 2014-4-20 19383 Butte About 50 yards southeast of a small falls, about 3/4 mile northwest of parking area on the west side of Cherokee Road, about 7 miles (air) north of Oroville. 378 Comment
  CHSC71207  Agrostis microphylla Lowell Ahart 1998-5-30 7961 Butte About 100 yards west of the lone oak tree, wet of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  GH341312  Agrostis semiverticillata L. Ahart 1987-5-27 5700 Unknown North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap, Butte County, California 271 Comment
  CDA28150  Agrostis stolonifera L. Ahart 2003-7-6 10366 Yuba East of the power line, about 50 yards west of Fountain Hill Road, about 5 miles (air) north of Dobbins. Comment
  CHSC81175  Agrostis stolonifera Lowell Ahart 2001-8-28 9192 Plumas Near strand of Lake Almanor, south 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, on the west side of the poor dirt road, about 3/4 mile northeast of Chester. 1371 Comment
  CHSC94569  Agrostis stolonifera Lowell Ahart 2006-9-9 13253 Tehama On the west side of Colby Creek, west of the dirt road, south of the 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
  JEPS117530  Agrostis stolonifera Lowell Ahart 2010-9-9 17147 Plumas Along the south side of Quincy La Porte Road, about 30 yards southwest of where the road crosses Onion Valley Creek, Onion Valley, about 9 1/2 miles (air) northeast of La Porte 1899 Comment
  CHSC113459  Agrostis variabilis Lowell Ahart 2014-7-7 19605 Butte In a large disturbed area on the south side of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1664 Comment
  CHSC61938  Agrostis variabilis Lowell Ahart 1993-9-24 7249 Sierra On the north side of Mount Fillmore, about 3/4 mile south of the dirt road from Gibsonville to Johnsville. 2133 Comment
  JEPS121955  Agrostis variabilis Lowell Ahart 2014-7-7 19605 Butte On the south side of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CHSC94474  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC50065  Aira caryophyllea Lowell Ahart 1990-1-17 6408 Butte Below the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprisa Bridge across Lake Oroville. 289 Comment
  SEINET10507043  Aira caryophyllea Lowell Ahart 1985-5-5 Ahart 4901 Sutter East of the road, about 2 miles south-east of the Dean Cabin, about 2 miles north of Sutter, Sutter Buttes. Comment
  CAS-BOT-BC138343  Aira caryophyllea var. caryophyllea Lowell Ahart 1979-5-11 s.n. Butte Peter Ahart Ranch. Honcut. 50 Comment
  CHSC47600  Aira elegans Lowell Ahart 1975-4-15 203 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 1/2 miles east of Honcut, about 12 miles south of Oroville. 42 Comment
  CHSC33668  Alisma lanceolatum L. Ahart 1981-5-25 2837 Butte In a depression along side of rice field, along Central House Rd, ca. 1 1/4 mi nw of Honcut. 35 Comment
  JEPS104027  Alisma plantago-aquatica Lowell Ahart 2003-6-23 10304 Butte In a rice field, Peter Ahart Ranch, ca 300 yd e of the Palermo Honcut Highway, ca 2 1/8 mi n of Honcut, ca 12 mi south of Oroville. 30 Comment
  CHSC112334  Alisma triviale Lowell Ahart 2013-7-9 18836 Butte South side of North Honcut Creek, west of the steel power line, about 2 mile (air) northeast of Honcut, about 13 miles (air) southeast of Oroville. 37 Comment
  JEPS121232  Alisma triviale Lowell Ahart, John Dittes 2013-7-24 18923 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
  CHSC84194  Allium amplectens Lowell Ahart 2003-7-14 10380 Colusa Along a very small drainage, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  RSA768995  Allium amplectens Lowell Ahart 2010-5-23 16729 Butte West side of Guardians Trail, north of the small drainage, about 50 yards north of Pine Trial, about 1/4 air mile west of Highway 32, about 9 air miles northeast of Chico. 430 Comment
  SBBG128774  Allium amplectens L. Ahart 2013-5-1 18682 Colusa near a small drainage, N of the wash and State 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-BC466609  Allium campanulatum Lowell Ahart 1977-7-9 s.n. Plumas 0.5 mile below the Bunker Hill Mine which is about 10 miles northeast of La Porte 1800 Comment
  JEPS105845  Allium cratericola Lowell Ahart 2004-5-3 10872 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 1243 Comment
  CHSC106176  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
  JEPS87857  Allium sanbornii var. sanbornii Lowell Ahart 1994-7-28 7526 Butte ca. 1/2 mi. s.e. Little Bald Rock (s. side of Bean Creek Rd.) 914 Comment
  RSA337384  Allophyllum divaricatum L. Ahart 1984-6-8 4664 Butte At the Ponderosa Dam, ca. 2 mi NW of Forbestown. 370 Comment
  SEINET10969173  Allophyllum divaricatum Lowell Ahart 1984-6-8 Ahart 4673 Butte At the Ponderosa Dam, ca. 2 mi NW of Forbestown; Yellow Pine Forest; 370 m. 370 Comment
  JEPS98970  Allophyllum gilioides subsp. violaceum Lowell Ahart 2001-7-21 8972 Nevada North of the dirt road, about 50 yards south of the railroad, about 100 yards NE of the old sheep corral, NE of Lake Van Norden, about 1 1/2 miles east of Soda Springs. 2066 Comment
  RSA0035828  Allophyllum integrifolium Lowell A. 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
  SEINET10935988  Allophyllum violaceum Lowell Ahart, Peter Ahart 1983-10-27 Ahart 4479 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
  CHSC46477  Alnus rhombifolia Lowell Ahart 1977-11-21 1226 Butte Along the edge of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 54 Comment
  JEPS108914  Alnus rhombifolia Lowell Ahart 2006-8-9 13108 Colusa Gravel bar on the north side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  JEPS102460  Alopecurus aequalis Lowell Ahart 2001-8-10 9096 Sierra Along river and around dam, diversion dam across 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
  CHSC113284  Alopecurus carolinianus Lowell Ahart 2014-4-25 19403 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
  RSA0118723  Alopecurus carolinianus Lowell A. Ahart 2014-4-25 19403 Butte On the west side of Richvale South Highway, south of the intersection of Richvale West Road and Richvale South Highway, Richvale. 31 Comment
  UCD55881  Alopecurus carolinianus L. Ahart 1978-4-21 1660 Butte Peter Ahart Ranch, Honcut. 50 Comment
  SEINET10868886  Alopecurus carolinianus Lowell Ahart 1990-6-16 Ahart 6517 Butte Along Mccabe Creek below the high water line of Lake Oroville about 1/2 mile southwest of the Enterprise Bridge across Lake Oroville. T19N R6E nw/S7. Foothill woodland (destroyed). 244 Comment
  JEPS120881  Alopecurus pratensis Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18768 Modoc About 100 yards NE of the Parking Area, NE of the old barn, Ash Creek Wildlife Area, about 3.9 air miles W of Adin, about 7.7 air miles NE of Bieber, Big Valley. Comment
  CHSC39627  Alopecurus saccatus Lowell Ahart 1983-5-12 3978 Butte About 1/2 mile north-east of Highway 99 and Pentz Road. 65 Comment
  RSA768997  Alopecurus saccatus L. Ahart 2010-5-16 16691 Butte About 1/4 mile south of the parking area, North Table Mountain, about 4.5 air miles northeast of Oroville 372 Comment
  CHSC108131  Amaranthus albus Lowell Ahart 2011-10-29 17720 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
  CHSC113104  Amaranthus albus Lowell Ahart 2013-11-18 19280 Butte Below the high water line of Lake Oroville, about 150 yards northeast of the boat ramp at the end of Stringtown Road, about 50 yards north of the road, about 2 1/2 miles (air) northeast of Hurleton. 261 Comment
  CHSC40899  Amaranthus albus Lowell Ahart 1985-11-7 5228 Butte Below the high water line of Lake Oroville, on the north side of the South Fork of the Feather River, about 200 yards north-west of the Ponderosa Dam. 286 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
  UCD97101  Amaranthus albus L. Ahart 1982-7-10 3671 Butte 1/4 mi se of Graylodge HQ, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. Comment
  UCSB64011  Amaranthus albus Ahart, Lowell 1982-7-10 Butte About 1/4 miles south-east of the Gray Lodge Headquarters, about 12 miles south-west of Gridley, Butte County, California 30 Comment
  NY663956  Amaranthus blitoides L. Ahart 1981-7-3 2910 Sutter Near the edge of Pass Road, a little west of Kellogg Road, Sutter Buttes. 100 Comment
  CHSC113539  Amaranthus californicus Lowell Ahart 2014-9-23 19880 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
  JEPS103456  Amaranthus californicus Lowell Ahart 2002-10-17 9984 Butte On the hills below the high water line of Lake Oroville, ca 1 1/2 miles S of Highway 162 (Oroville Quincy Highway), ca 3 miles (air) NE of Oroville Dam. 227 Comment
  JEPS127161  Amaranthus californicus Lowell Ahart, John Dittes 2016-7-16 21253 Modoc South of Ash Creek State Wildlife Area, 0.79 mile (air) south of County Road 87, 1.7 miles (air) southwest of Adin Big Valley. Comment
  JEPS113489  Amaranthus hybridus Lowell Ahart 2007-6-30 14239 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
  RSA726802  Amaranthus hybridus L. Ahart 2007-6-30 14239 Yuba About 13 miles (air) northeast of Marysville. 36 Comment
  CHSC37052  Amaranthus retroflexus L. Ahart 1982-10-11 3886 Sutter Along the edge of Pass Rd., s of South Butte, Sutter Buttes. 50 Comment
  JEPS115744  Amaranthus retroflexus Lowell Ahart 2009-10-12 16471 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 133 Comment
  JEPS120755  Ambrosia acanthicarpa Lowell Ahart 2013-9-11 19026 Plumas On the west side of the paved road, on the north side of Antelope Lake, about 1/2 mile west of Antelope Creek, about 16 air miles NE of Taylorsville. Comment
  CHSC105790  Ambrosia psilostachya Lowell Ahart 2010-9-13 17152 Butte Open dry areas, Oroville Wildlife Area, about 1/2 mile west of Pacific Heights Road, about 3 1/2 miles (air) northwest of Palermo. 31 Comment
  CHSC112497  Ambrosia psilostachya Lowell Ahart 2013-10-22 19204 Glenn Above the high water line of Stony Gorge Reservoir, about 2 1/2 miles south of the dam, about 17 miles (air) northwest of Willows. 240 Comment
  CHSC113031  Ambrosia psilostachya Lowell Ahart 2013-8-8 19016 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  JEPS102572  Ambrosia psilostachya Lowell Ahart 2001-11-2 9410 Yuba Camp Far West Reservoir, about 1/8 mile NE of the dam, about 9 miles (air) SE of Wheatland. 91 Comment
  CHSC99766  Amelanchier alnifolia var. semiintegrifolia Lowell Ahart; John Dittes 2008-6-19 14845 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
  CHSC75967  Ammannia coccinea Lowell Ahart; Vernon H. Oswald 1999-8-13 8167 Butte Along east side of the Sacramento River, northwest of Parrott Landing, about1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CHSC84957  Ammannia coccinea Lowell Ahart 2003-10-23 10673 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
  JEPS120727  Ammannia coccinea Lowell Ahart 2013-10-19 19119 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
  RSA718049  Ammannia coccinea L. Ahart 2006-8-5 13084 Butte Peter Ahart Ranch, about 1 1/2 miles north and 300 yards east of Honcut, about 12 miles south of Oroville. 30 Comment
  GH403196  Ammannia robusta L. Ahart 2012-8-24 18429 Unknown T22N, R5W, northeast 1/4 Section 12. on the strand of Black Butte Reservoir 136 Comment
  SEINET10874099  Amorpha californica Lowell Ahart 1985-6-23 Ahart 5068 Sutter Dean Ranch, Sutter Buttes, Sutter County, ca. 12 miles W of Marysville. Comment
  CHSC91353  Amsinckia menziesii Lowell Ahart; John Dittes 2005-6-9 12046 Siskiyou Along the west 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
  JEPS107482  Amsinckia menziesii var. menziesii Lowell Ahart, John Dittes 2005-6-9 12046 Siskiyou Along the west 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
  JEPS93817  Anagallis arvensis Lowell Ahart 1998-6-30 8011 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); North Table Mountain, Cherokee Road 403 Comment
  CHSC46905  Anaphalis margaritacea Lowell Ahart 1980-10-8 2683 Nevada Near the bridge across East Fork Creek, about 2 miles north of Weaver Lake, about 4 miles north of Bowman Lake. 1463 Comment
  CHSC93466  Ancistrocarphus filagineus Lowell Ahart 2006-5-5 12579 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. 561 Comment
  CAS-BOT-BC137801  Andropogon virginicus var. virginicus Lowell Ahart 1987-10-22 5926 Butte About 0.5 mile west of the north entrance to the Oroville Wildlife Refuge, west of Pacific Heights Road, about 5 miles southwest of Oroville. 38 Comment
  CHSC102295  Andropogon virginicus var. virginicus Lowell Ahart 2009-10-7 16409 Butte Just underwater when the Thermalito Afterbay is full, Larking Road access to the Thermalito Afterbay, about 5 miles (air) southwest of Oroville. 136 Comment
  CHSC103174  Andropogon virginicus var. virginicus Lowell Ahart 2009-11-19 16552 Butte On the east side of Big Chico Creek, southwest of a 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
  JEPS94518  Angelica breweri Lowell Ahart 1997-8-7 7836 Yuba about 3 air mi ne of Challenge (abut 2 air mi se of Woodleaf, on e side of the dirt road) 853 Comment
  SEINET10939832  Angelica breweri Lowell Ahart 1985-7-24 Ahart 5151 Butte Along the Forbestown Ditch, abut 2 1/2 miles north-east of Forbestown. Comment
  CHSC117048  Antennaria luzuloides subsp. luzuloides Lowell Ahart; John Dittes 2016-6-6 20949 Modoc About 40 yards west of the dirt road, about 50 yards southwest of the intersection of County Road 87 and Access Road to Pilot Butte Parking Area, northeast base of Pilot Butte, 3.8 miles (air) east of Lookout, 7.5 miles (air) west of Adin, Ash Creek State Wildlife Area. 1271 Comment
  CAS-BOT-BC84682  Anthemis cotula Lowell Ahart 1982-5-30 3461 Sutter Myers Ranch, Sutter Buttes. Along the small wash where th road crosses 50 Comment
  JEPS98278  Anthoxanthum odoratum Lowell Ahart 2000-6-29 8539 Butte On the northwest side of Concow Road at Flea meadow, about .5 mile west of Flea Mountain, about 3.5 miles (air) north of Concow Reservoir, about 5 miles (air) east of Magalia. 1036 Comment
  CHSC101270  Anthriscus caucalis Lowell Ahart 2009-4-3 15521 Butte On the north side of the gravel road, Cedar Grove parking area in Lower Bidwell Park, Chico. 67 Comment
  RSA769680  Anthriscus caucalis L. Ahart 2009-4-3 15521 Butte North side of gravel road, Cedar Grove Parking Area in Lower Bidwell Park, Chico 67 Comment
  JEPS108826  Antirrhinum subcordatum Lowell Ahart 2006-6-11 12694 Glenn On the west side of the road, about 1/4 mile past the meadow (north), seep at the start of Black Diamond Creek, about 2 3/4 miles (air) northeast of the North Fork Campground, about 4 miles (air) northwest of Stonyford 722 Comment
  CHSC78166  Antirrhinum vexillo-calyculatum subsp. intermedium Lowell Ahart 2000-5-31 8423 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
  JEPS104394  Antirrhinum vexillocalyculatum subsp. intermedium Lowell Ahart 2003-7-14 10388 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 Comment
  JEPS107980  Antirrhinum virga Lowell Ahart, Robert Schlising 2005-7-2 12134 Lake About 30 yards north of Bartlett Springs Road (Road M12), near the northwest part of Indian Valley Reservoir 477 Comment
  RSA724838  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  CHSC63151  Aphyllon purpureum Lowell Ahart 1994-7-1 7424 Sierra South of the larger pond, steep slope on the north side of Henness Pass Road, at Keystone Gap, east of Keystone Mountain, about 1 1/2 miles north-east of Middlewaters, about 11 miles (air) north-east of Alleghany. 1889 Comment
  CHSC100317  Apocynum androsaemifolium Lowell Ahart 2008-8-14 15193 Plumas 30 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
  CAS-BOT-BC392099  Aquilegia formosa Lowell Ahart 1979-6-25 s.n. Yuba 2 miles east of Challenge 700 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
  CHSC90946  Arabidopsis thaliana Lowell Ahart 2005-4-18 11742 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
  JEPS102355  Arabis glabra var. glabra Lowell Ahart 2001-7-19 8940 Plumas about 2 1/2 air miles SE of Pilot Peak (Hopkins Creek, about 100 yds. NW of East Branch, about 1/2 air miles S of Turkey Town) 1828 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
  CHSC100970  Arbutus menziesii Lowell Ahart; Josephine Guardino, Steve Green 2009-2-20 15489 Butte East side of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  CHSC41895  Arbutus menziesii Lowell Ahart 1974-12-5 683 Butte Along the dirt road near Pinkard Creek, about 2 miles west of the Sly Creek Dam. 914 Comment
  JEPS107976  Arceuthobium abietinum Lowell Ahart, John Dittes 2005-9-19 12412 Plumas Along the east side of a good dirt road, about 1 1/4 miles southeast of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake 1998 Comment
  CHSC31970  Arctostaphylos manzanita L. Ahart 1976-2-14 1002 Colusa Ca. 3 mi W of sites. 365 Comment
  CHSC103165  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 2009-11-19 16564 Butte On the west side of Ten Mile House Road, just north of Guardians Trail, Upper Bidwell Park, about 1/4 miles west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  CHSC109105  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 2012-3-23 17774 Butte West edge of a small opening, about 100 yards south of the intersection of Guardian Trail and Ten Mile House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico. 437 Comment
  JEPS115159  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2009-11-19 16563 Butte On the south 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 369 Comment
  JEPS119541  Arctostaphylos mewukka subsp. mewukka Lowell Ahart 2012-1-12 17735 Butte Peter Ahart Ranch, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles southeast of Oroville. 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
  CHSC106887  Arctostaphylos viscida subsp. viscida Lowell Ahart 2011-2-28 17326 Butte 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. 47 Comment
  CHSC95990  Arctostaphylos viscida subsp. viscida Lowell Ahart 2007-2-13 13550 Butte High on the west side of North Honcut Creek, Peter Ahart Ranch, about 3/4 mile north and 2 2/3 miles east of Honcut, about 12 miles southeast of Oroville. 46 Comment
  JEPS107511  Arenaria congesta var. suffrutescens Lowell Ahart 2005-7-23 12178 Nevada West of the meadow under the power lines, about 150 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  CHSC32025  Arenaria kingii var. glabrescens L. Ahart 1975-7-9 866 Plumas Ca. 1 mi w of Pilot Peak. 1981 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
  UCD56450  Aristida oligantha L. Ahart 1977-7-14 1464 Butte Honcut, Peter Ahart Ranch. 50 Comment
  CDA31402  Aristida ternipes var. hamulosa L. Ahart, Vernon H. Oswald 2001-8-22 9179 Glenn Just south of Road 206, about 2 3/4 miles southwest of Newville Road, near the bridge across a small branch of Hambright Creek, along both sides of the road Comment
  CAS-BOT-BC400423  Aristolochia californica Lowell Ahart 1969-3-27 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  CHSC87993  Arnica mollis Lowell Ahart; John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11166 Plumas Around 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
  JEPS118462  Arnica sororia Lowell Ahart, John Dittes 2011-6-21 17530 Modoc Moist meadow, on south edge of Ash Creek Floodplain, 1.8 miles (air) east of Elkins Lane, 1.2 miles (air) south of County Road 87, 2.5 miles (air) west of Adin, Big Valley 1267 Comment
  RSA724842  Artemisia cana subsp. bolanderi L. Ahart 2006-9-21 13339 Plumas about 50 yards south of the railroad tracks, about 100 yards west of Beckwourth Calpine Road, about 3/4 mile (air) southwest of Beckwourth, Sierra Valley 1484 Comment
  JEPS104400  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS114470  Artemisia douglasiana Lowell Ahart, John Dittes 2008-8-21 15221 Merced On the banks 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
  RSA0105480  Artemisia douglasiana Lowell Ahart 2014-8-26 19787 Plumas In the middle 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
  JEPS102589  Artemisia dracunculus Lowell Ahart 2001-10-8 9316 Plumas On the south side of Boulder Creek, below or near the high water line of Antelope Lake, about 24 miles (air) NE of Quincy. 1524 Comment
  CHSC81603  Artemisia ludoviciana subsp. ludoviciana Lowell Ahart 2001-10-8 9315 Plumas On the south side of Boulder Creek, below or near the high water line of Antelope Lake, about 24 miles (air) northeast of Quincy. 1524 Comment
  JEPS93860  Asclepias eriocarpa Lowell Ahart 1998-7-18 8043 Butte about 7 air mi n of Oroville (w of Cherokee Road, about 50 ft sw of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain 403 Comment
  CHSC108319  Asclepias fascicularis Lowell Ahart 2011-8-17 17629 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
  CHSC117492  Asclepias fascicularis Lowell Ahart; John Dittes 2016-7-13 21150 Lassen Sides of the overflow, about 50 yards north of the dam, 200 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 of the southern slope of Big Valley. 1289 Comment
  JEPS106296  Asclepias fascicularis Lowell Ahart 2004-6-11 11041 Tehama On the west 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
  CHSC43319  Asclepias speciosa Lowell Ahart 1979-6-25 1934 Yuba Near the edge of LaPorte Road, about 2 miles south-west of Brownsville. 365 Comment
  SBBG128803  Asclepias speciosa L. Ahart 2013-6-11 18799 Butte wet meadow ca. 10 yards N of Forbestown Rd, ca. 150 yards E of the intersection of Forbestown Rd and Black Bart Rd, ca. 3.25 mi (air) SW of Forbestown 737 Comment
  CHSC111737  Aspidotis densa Lowell Ahart 2012-7-1 18248 Plumas About 200 yards west of Caribou Road, about 4 miles (air) northeast of Belden. 833 Comment
  CHSC105782  Aster breweri Lowell Ahart 2010-9-15 17161 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
  SEINET256566  Aster chilensis Lowell Ahart 1985-10-8 5195 Butte On the bottom and side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 55 Comment
  CHSC34915  Aster radulinus Lowell Ahart 1980-9-17 2647 Plumas Along the edge of the dirt road ca. 1 mi W of Fowler Peak, ca. 8 mi N of La Porte. 1800 Comment
  CHSC44849  Aster radulinus Lowell Ahart 1976-8-10 1185 Sierra By the edge of Eureka Mine Road, about 3/4 mile west of Little Fiddle Creek, about 7 air miles west of Downieville. 1371 Comment
  CHSC63142  Astragalus bolanderi Lowell Ahart 1994-7-1 7447 Sierra On both sides of Henness Pass Road , at intersection of a logging road to Harris Meadow and Henness Pass Road, about 2 miles south-west of Middle Waters, about 7 1/2 miles (air) north-east of Alleghany. 1950 Comment
  JEPS87628  Astragalus bolanderi Lowell Ahart 1994-7-1 7447 Sierra at intersection of a logging road to Harris Meadow and Henness Pass Road about 2 mi sw Middlewaters (about 7 1/2 mi (air) ne of Alleghany); sw of Middlewaters, ne of Alleghany 1950 Comment
  CDA26635  Astragalus clevelandii L. Ahart 2003-7-14 10403 Lake On the west side of the second causeway going southwest on Bartlett Springs Road, Indian Valley Reservoir. Comment
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  HSC93425  Astragalus gambelianus L. Ahart 1995-5-30 7577 Butte N Table Mtn., about 7 mi. N of Oroville, about 2 mi. NW of Cherokee Rd., 1/10 mi. SE of the reservoir. 305 Comment
  SEINET10452223  Astragalus gambelianus Lowell Ahart, James D. Jokerst 1985-5-10 Ahart 4940 Butte Eastern Table Mountain area in gulchlands, about 8 miles north of Oroville. Comment
  JEPS114989  Astragalus lemmonii Lowell Ahart, John Dittes 2008-6-20 14968 Lassen About 10 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
  CHSC80525  Astragalus tener var. ferrisiae Lowell Ahart 2001-4-15 8721 Butte About 15 feet southeast 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. 22 Comment
  CHSC116011  Athyrium distentifolium var. americanum Lowell Ahart 2015-10-9 20549 Butte On the northside of the dirt road to Lotts Lake, about 1/8 mile southeast of the Carr Mine, about 3 miles (air) east of Philbrook Reservoir dam. 1842 Comment
  CHSC117578  Athyrium distentifolium var. americanum Lowell Ahart; John Dittes, Josephine Guardino 2016-9-21 21360 Tehama Wet area west 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
  JEPS127316  Athyrium distentifolium var. americanum Lowell Ahart, John Dittes, Josephine Guardino 2016-9-21 21360 Tehama About 50 yards south of Bluff Falls, about 1 miles south of Lassen Volcanic National Park, about 2 1/2 miles (air) north of Morgan Mountain. Comment
  RSA795639  Athyrium filix-femina subsp. cyclosorum L. Ahart 2011-9-17 17656 Plumas On the south side of an unnamed stream that flows east in 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
  CAS-BOT-BC68686  Athyrium filix-femina var. californicum Lowell Ahart 1981-9-15 3153 Butte Sierra Nevada - One hald mile N of the Lost Creek Reservoir 1100 Comment
  CHSC100452  Athyrium filix-femina var. cyclosorum Lowell Ahart 2008-9-10 15359 Plumas East edge of East Branch Creek, on the southeast side of the Quincy La Porte Road, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile north east of La Porte. 1593 Comment
  CHSC34150  Athyrium filix-femina var. cyclosorum L. Ahart 1981-9-15 3153 Butte On sides of Pinkard Creek, ca. 1/2 mi n of Lost Creek Reservoir. 1100 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
  CHSC69712  Athyrium filix-femina var. cyclosorum Lowell Ahart 1997-10-20 7930 Butte 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
  CHSC80790  Athyrium filix-femina var. cyclosorum Lowell Ahart 2001-7-19 8935 Plumas On the banks 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
  JEPS116141  Athyrium filix-femina var. cyclosorum Lowell Ahart, John Dittes 2009-8-28 16350 -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
  CHSC115389  Athysanus pusillus Lowell Ahart 2015-4-1 19995 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
  CHSC34171  Atriplex heterosperma L. Ahart 1981-9-10 3149 Butte Along the edge of ditch near entrance to Graylodge Waterfowl Mgmt HQ w of Pennington Rd, ca. 12 mi sw of Gridley. 35 Comment
  CHSC106167  Atriplex patula var. obtusa Lowell Ahart; John Dittes 2010-8-31 17112 Modoc About 10 yards west of Elkins Lane, about 150 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. 1274 Comment
  JEPS117249  Atriplex patula var. obtusa Lowell Ahart, John Dittes 2010-8-31 17112 Modoc About 10 yards west of Elkins Lane, about 150 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 1274 Comment
  JEPS121188  Atriplex rosea Lowell Ahart, John Dittes 2013-7-25 18956 Modoc Along the N-S fence, S edge of Ash Creek floodplain, NW of Patterson Homestead, E of Elkins Lane, 1.0 air mile S of County Road 87, 3.14 air miles W of Adin, Big Valley. Comment
  CAS-BOT-BC176603  Atriplex serenana var. serenana Lowell Ahart 1989-9-28 6400 Butte On the east side of Highway 70, near Garden Drive off ramp, Thermalito 73 Comment
  CHSC111715  Avena barbata Lowell Ahart 2012-6-2 18134 Butte Along the sides of Truex Road and Trevor Road, about 1/8 mile northwest of the West Branch Bridge across Lake Oroville. 286 Comment
  CHSC113304  Azolla filiculoides Lowell Ahart 2014-4-9 19338 Butte Bottom of a drying deep pond, about 50 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
  CHSC47371  Azolla filiculoides Lowell Ahart 1989-11-12 6405 Butte 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
  CHSC89454  Baccharis pilularis Lowell Ahart 2004-10-4 11453 Lake On the south edge of Bartlett Springs Road (Road M 12), about 1/8 mile northeast of the northeast part of Indian Valley Reservoir. 463 Comment
  JEPS119628  Baccharis pilularis subsp. consanguinea Lowell Ahart 2012-6-14 18194 Butte About 30 yards east of Mangrove Avenue, Annie's Glen, Lower Bidwell Park, Chico. Comment
  JEPS120731  Baccharis pilularis subsp. consanguinea Lowell Ahart 2013-10-19 19125 Glenn High flood plain west of the Sacramento river, about 300 yards north of the bridge, west of Butte City. 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
  CHSC102703  Barbarea orthoceras Lowell Ahart; John Dittes, Josephine Guardino 2009-7-22 16158 Plumas Bottom of a small wash, 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
  CHSC44898  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, about 4 1/2 air miles north-east of Stirling City. 1524 Comment
  CAS-BOT-BC16788  Barbarea verna Lowell Ahart 1977-4-18 s.n. Yuba Along Dry Creek, about 10 miles northeast of Marysville. 100 Comment
  CHSC87349  Berberis aquifolium var. dictyota Lowell Ahart 2004-4-27 10770 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
  CHSC112727  Bergia texana Lowell Ahart 2013-10-22 19187 Glenn Near an old homestead, strand of Stony Gorge Reservoir, about two miles south of the dam, about 17 miles (air) northwest of Willows. 248 Comment
  SBBG60376  Berula erecta L. Ahart, J. Dittes 2010-7-30 16934 Siskiyou W edge of Shasta River, ca. 30 yards NW of E Louie Rd Bridge, Shasta Big Springs Ranch, 1.6 mi (air) SW of Big Springs Lake, 4.6 mi (air) NW of Dwinnel Dam, 5.7 mi (air) SE of Grenada 716 Comment
  CHSC91250  Betula occidentalis Lowell Ahart; John Dittes 2005-6-10 12072 Siskiyou On the north side of the Shasta River, near rocky hillside north of the Shasta River, south of a poor dirt road, about 50 yards northwest 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
  JEPS115512  Bidens cernua Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16305 Tehama West side of pond, on the east side 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 L 1493 Comment
  RSA724879  Bidens frondosa L. 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. 432 Comment
  CHSC54581  Bistorta bistortoides Lowell Ahart 1991-7-22 6677 Sierra French Meadow, about 1/4 mile south of Henness Pass Road, about 3 miles north-west of Webber Lake. 2133 Comment
  CHSC39946  Blennosperma nanum Lowell Ahart 1984-3-24 4525 Sutter West Butte Road, 1.4 miles N of the Sacramento Outing Club, Sutter Buttes, west of Marysville. Along edge of West Butte Road. 35 Comment
  CAS-BOT-BC16070  Boechera breweri Lowell Ahart 1982-7-28 3714 Sierra About 5 miles east of La Porte. About 0.125 mile north of the Pacific Mine. 1700 Comment
  CHSC107999  Boechera pinetorum Lowell Ahart; John Dittes 2011-6-20 17505 Lassen About 40 yards north of the dirt road, 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
  CHSC46632  Boechera pinetorum Lowell Ahart 1989-7-7 6371 Plumas Along the logging road, on the east side of Bunker Hill Creek, about 1/2 mile north of the Bunker Hill Mine, about 12 miles north-east of La Porte. 1828 Comment
  CHSC43442  Boechera platysperma Lowell Ahart 1974-8-3 588 Plumas Near Mount Etna, about 5 miles east of the Bunker Hill Mine, about 14 miles north-east of La Porte. 1828 Comment
  CHSC101786  Boechera rectissima Lowell Ahart; John Dittes, Josephine Guardino 2009-6-14 15857 Plumas Along the north road edge, near cut bank of Forest Road 27N01Y, about 1.3 miles (air) west of Lake Almanor Dam. 1462 Comment
  CAS-BOT-BC75492  Bolboschoenus maritimus subsp. paludosus Lowell Ahart 1981-11-6 3226 Butte Gray Lodge, southwest of Gridley. 35 Comment
  JEPS95898  Bolboschoenus maritimus subsp. paludosus Lowell Ahart 1999-9-13 8221 Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  CHSC100335  Botrychium simplex var. compositum Lowell Ahart 2008-7-16 15106 Plumas Open basalt area in forest, in a small meadow, about 220 yards southeast of the intersection to Lumpkin Ridge Road and the road to Tamarack Flat, about one mile northwest of the Dam (Little Grass Valley Reservoir), about 4 miles (air) northwest of La Porte. 1744 Comment
  CHSC82541  Botrychium simplex var. compositum Lowell Ahart; John Dittes 2002-6-17 9727 Plumas On the west side of a meadow, about 40 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. 1715 Comment
  CHSC82552  Botrychium simplex var. compositum Lowell Ahart 2002-7-18 9864 Plumas Meadow, about 100 yards south of the road to Tamarack Flat, on the north side of a small branch of Fall River, about 1/8 mile southwest 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
  CHSC11101  Boykinia major Lowell Ahart 1966-8-12 Placer Near French Meadows. 1676 Comment
  JEPS103476  Brachypodium distachyon Lowell Ahart 2002-5-7 9634 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
  JEPS98558  Brachypodium distachyon Lowell Ahart 2000-5-16 8359 Butte 5 air miles SW of Oroville (Thermalito Afterbay, N side of access road to boat ramp, W of Larkin Road, 1 1/4 mi S of Oroville Airport) 42 Comment
  CHSC42062  Brassica rapa Lowell Ahart 1986-11-7 5423 Butte In a prune orchard, east of the Feather River, north of the Oroville Gridley Highway, about 3 miles east of Gridley. 28 Comment
  JEPS113691  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
  UCD57387  Briza minor L. Ahart 1982-4-29 3391 Butte Graylodge Wildlife Refuge. A little W of check-in station. Ca. 12 miles SW of Gridley. 35 Comment
  SEINET10472609  Brodiaea californica Lowell Ahart 1983-6-15 Ahart 4053 Butte Peter Ahart Ranch, ca. 2.5 mi ne of Honcut. Foothill Woodland; 50 m. Along the edges of North Honcut Creek. 50 Comment
  SEINET10472612  Brodiaea coronaria Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4686 Butte Along edge of Hurleton Swedes Flat Rd, ca. 2 mi S of Forbestown Rd, ca. 12 mi SE of Oroville; Foothill Woodland; 450 m. 450 Comment
  CHSC31511  Brodiaea nana L. Ahart 1977-5-2 1341 Butte Peter Ahart Ranch, Honcut. 50 Comment
  RSA325953  Brodiaea sierrae Lowell Ahart 1983-6-15 4053 Butte Peter Ahart Ranch, ca 2.5 mi NE of Honcut. Along the edges of N Honcut Creek. 50 Comment
  UCD139175  Brodiaea sierrae Lowell Ahart 1998-7-19 8049 Butte on the southeast side of the dirt road to the Forbestown reservoir, about 1 mile northeast of ForbestownRoad, about 2.5 miles (air) northeast of Forbestown. 883 Comment
  RSA718943  Bromus arenarius L. Ahart 2006-6-11 12721 Glenn About 100 yards north of the ford across Stony Creek (Forest Road 18N03) about 2 miles ( air) northwest of the North Fork Campground, about 5 1/4 miles west-northwest of Stonyford. 596 Comment
  CHSC87811  Bromus carinatus var. carinatus Lowell Ahart 2004-6-2 10989 Butte Near a small meadow, on the east side of a logging road, on the north side of Forbestown Road, about 200 yards east of the intersection of Black Bart Road and Forbestown Road, about 3 1/4 miles (air) southwest of Forbestown. 752 Comment
  CHSC88915  Bromus catharticus Lowell Ahart 2004-8-30 11399 Butte In a walnut orchard, on the north side of O'Brien Road, about 100 yards east of Gilstrap Avenue, about 1 1/2 miles (air) southeast of Gridley. 28 Comment
  JEPS103569  Bromus catharticus Lowell Ahart 2002-4-15 9493 Butte On a canal bank, on the W side of Faris Road, 3 miles W of West Biggs Gridley Road, ca 3 miles (air) SW of Biggs. 24 Comment
  CHSC118544  Bromus commutatus Lowell Ahart; John Dittes, Josephine Guardino 2017-6-15 21415 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
  JEPS114642  Bromus diandrus Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14637 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 53 Comment
  CHSC104810  Bromus hordeaceus Lowell Ahart 2010-6-12 16797 Butte Along the south side of a small stream, about 150 yards east of Ten Mile House Road, about 3/4 mile (air) west of Highway 32, about 9 miles (air) northeast of Chico. 238 Comment
  CHSC112683  Bromus hordeaceus Lowell Ahart; John Dittes 2013-6-9 18795 Shasta On the bank of a deep irrigation ditch, Hollenbeck Field, 950 feet east of Rat Farm Boat Launch, 3.4 air-miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  CHSC42846  Bromus hordeaceus Lowell Ahart 1987-5-6 5551 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
  JEPS119865  Bromus hordeaceus Lowell Ahart 2012-5-14 18046 Butte A little east of Table 7, on the south side of Big Chico Creek, north of the paved road, northeast of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC100012  Bromus inermis subsp. inermis Lowell Ahart; John Dittes 2008-8-25 15281 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
  CHSC39961  Bromus japonicus L. Ahart; P. Ahart 1983-6-26 4143 Butte Around a meadow along Ponderosa Way (Big Ridge Rd), ca. 1/2 mi s of East Fork Canyon Creek, ca. 13.5 mi ne of Oroville. 550 Comment
  JEPS107437  Bromus japonicus Lowell Ahart, John Dittes 2005-6-1 11865 Lassen On the west 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
  RSA691015  Bromus japonicus L. Ahart, John Dittes, Josephine Guardino, Steve Green 2003-5-27 10222 Butte about 100 yards west of the dirt road, west of Diversion Dam on Big Chico Creek, west of Parking Area L, Upper Bidwell Park, about 3.5 miles east of Manzinita Avenue, Chico. 122 Comment
  JEPS110374  Bromus laevipes Lowell Ahart 2006-6-21 12805 Sierra On the west side of the Foote Road, about 3.7 miles (by road) southwest of Alleghany 1093 Comment
  CHSC39490  Bromus madritensis subsp. madritensis Lowell Ahart 1983-6-21 4078 Butte Along Bloomer Hill Road, about 3/4 mile west of the Oroville Quincy Highway, about 15 miles north-east of Oroville. 425 Comment
  CHSC47609  Bromus madritensis subsp. rubens Lowell Ahart 1982-4-23 3338 Sutter About 1/4 mile west of the Myers home, Myers Ranch, Sutter Buttes. 45 Comment
  CHSC98810  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
  JEPS102748  Bromus orcuttianus Lowell Ahart 2001-7-23 8998 Plumas Along the edge of the dirt road, near sign of stagecoach robbery, about 1/2 mile north of Humboldt Summit. 1828 Comment
  JEPS106350  Bromus orcuttianus Lowell Ahart 2004-8-9 11369 Nevada On a poor logging road, about 200 yards south of the GPS location at Catfish Lake, about 200 yards south of Catfish Lake, about 100 yards west of Meadow Lake Road, about 1/2 mile (air) east of Jackson Lake 1984 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
  CHSC80714  Bromus pseudolaevipes Lowell Ahart 2001-6-8 8799 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  CAS-BOT-BC161972  Bromus rubens Lowell Ahart 1978-6-4 s.n. Sierra Sierra Nevada. 5 miles south of Alleghany. Comment
  CAS-BOT-BC161618  Bromus sterilis Lowell Ahart 1980-5-17 2292 Butte 0.5 mile southeast of Hurleton. 600 Comment
  SEINET10507344  Bromus sterilis Lowell Ahart 1985-5-10 Ahart 4956 Butte 10 meters north of the east branch of Potter Ravine, about 2 1/4 miles north of Oroville Dam. Comment
  JEPS107646  Bromus suksdorfii Lowell Ahart, Josephine Guardino 2005-8-9 12259 Plumas In a small meadow, between Lights Creek and Fant Creek, west of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake 1635 Comment
  CHSC111721  Bromus tectorum Lowell Ahart 2012-6-14 18187 Butte On the south side of the path, south of CARD Community Center, Lower Bidwell Park, Chico. 62 Comment
  CHSC84110  Bromus tectorum Lowell Ahart 2003-5-9 10120 Butte In an alfalfa field, on the south side of Evans Reimer Road, about 3/4 mile west of Block Road, 3 miles (air) southwest of Gridley. 24 Comment
  CHSC63186  Bulbostylis capillaris Lowell Ahart 1994-7-1 7438 Sierra South of the larger pond, steep rocky slope on the N side of Henness Pass Road, at Keystone Gap, E of Keystone Mountain, about 1 1/2 mi NE of Middlewaters, about 11 mi (air) NE of Alleghany. 1889 Comment
  JEPS103536  Bulbostylis capillaris Lowell Ahart 2002-7-18 9865 Plumas About 120 yards S of the road to Tamarack Flat, on the S side of a small branch of Fall River, ca 1/8 mile SW of the intersection of Lumpkin Ridge Road and road to Tamarack Flat, ca 1 mile (air) NW of Little Grass Valley Reservoir dam 1718 Comment
  UCR263567  Bulbostylis capillaris Lowell Ahart 1994-7-1 7438 Sierra Sierra Nevada Mtns., on the N side of Henness Pass Road, at Keystone Gap, E of Keystone Mountain, about 1.5 mi NE of Middlewaters, about 11 mi (air) NE of Alleghany 1890 Comment
  CHSC92116  Calamagrostis canadensis Lowell Ahart; John Dittes 2005-9-20 12429 Plumas On the west shore of Mud Lake, about 1/2 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2029 Comment
  HSC95509  Calamagrostis canadensis var. langsdorffii L. Ahart 1997-7-11 7757 Butte About 1/4 mi. (air) E of Bald Mtn., about 4 mi. (air) NE of Stirling City, E of the dirt road 1677 Comment
  CHSC107560  Calandrinia ciliata Lowell Ahart 2011-6-7 17409 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
  CHSC44421  Calandrinia ciliata var. menziesii Lowell Ahart 1988-5-29 6011 Butte On the bottom of a small mined wash, about 1/10 mile north-east of the old barn, about 1/2 mile north-east of the Honcut Cemetery, Joie Osgood Ranch, about 3 1/2 miles east and 1 1/2 miles north of Honcut. 60 Comment
  CHSC96376  Callitriche hermaphroditica Lowell Ahart 2007-4-3 13610 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
  CHSC103717  Callitriche heterophylla var. bolanderi Lowell Ahart 2010-5-14 16650 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
  CHSC96488  Callitriche marginata Lowell Ahart; Brian Williams 2007-4-13 13641 Placer On damp granite soil, bottom of small 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
  CHSC117242  Callitriche palustris Lowell Ahart; John Dittes 2016-7-16 21251 Modoc Strand of the second pond, south of Ash Creek Canal (now filled in), south of Ash Creek, Ash Creek State Wildlife Area, 0.79 miles (air) south of County Road 87, 1.75 miles (air) west of Adin, Big Valley. 1273 Comment
  UCD139538  Calochortus luteus L. Ahart 1979-5-12 1875 Butte Peter Ahart Ranch, Honcut. 50 Comment
  CAS-BOT-BC492599  Calochortus monophyllus Lowell Ahart 1985-3-22 4849 Butte Foothill Woodland. About 1/2 mile north-east of the west Branch Bridge across Lake Oroville, 1/4 mile east of Highway 70, north of Oville 450 Comment
  CHSC111124  Calochortus superbus Lowell Ahart 2012-5-12 18035 Butte On the west side of South Rim Trail, north of Bloody Pin Trail, about 5/8 mile west of Highway 32, south part of Upper Bidwell Park, about 7 3/8 miles (air) northeast of Chico. 236 Comment
  CHSC51252  Calycadenia ciliosa Lowell Ahart; Mary Sue Taylor 1990-8-28 6595 Butte On the south side of Highway 32, about 3 miles east of Chico. 182 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
  HSC103922  Calycadenia multiglandulosa L. Ahart 2013-7-1 18817 Butte About 3.25 mi. (air) SW of Forbestown; ~150 yds, E of the intersection of Forbestown Rd. and Black Bart Rd. 738 Comment
  CHSC107254  Calycadenia truncata Lowell Ahart; John Dittes 2011-6-9 17461 Tehama High bare rocky bank on the north side of Acorn Hollow Creek, just east of Dry Creek confluence, 2.1 miles (air) east of Highway 99, 3.8 miles (air) north of Vina. 75 Comment
  CHSC10553  Calyptridium umbellatum Lowell Ahart 1962-7-14 Placer French Meadows. 1676 Comment
  HSC96823  Calystegia malacophylla subsp. malacophylla L. Ahart 2006-6-21 12824 Sierra N side of the road, 2 mi. W of the forest 1330 Comment
  JEPS87606  Calystegia malacophylla subsp. malacophylla Lowell Ahart 1994-7-1 7442 Sierra about 11 mi (air) ne Alleghany (about 1 1/2 mi ne of Middlewaters, e of Keystone Mountain, at Keystone Gap, steep rocky slope on n side Henness Pass Road, n side lgr pond); e of Keystone Mountain, Keystone Gap, ne of Middlewaters 1889 Comment
  CHSC46360  Calystegia occidentalis Lowell Ahart 1989-5-28 6300 Butte On a steep slope south of Oregon Gulch Road, about 1/2 mile north of the Cemetery, about 1 1/4 miles west of Rocky Point, about 10 miles east and 3 miles north of Oroville. 335 Comment
  JEPS108793  Calystegia occidentalis subsp. occidentalis Lowell Ahart 2006-6-9 12642 Butte On the sides of a dead end side road, north side of the service road to Bardees Bar along the North Fork of the Feather River, about 50 yards east of the electric tower, on the east side of Highway 70, about 2 3/4 miles (air) southwest of Pulga 534 Comment
  RSA719204  Calystegia occidentalis subsp. occidentalis L. Ahart 2006-6-21 12796 Sierra On the west side of the foote Road, about 4 miles (by road) southwest of alleghany. 849 Comment
  CHSC68904  Calystegia occidentalis subsp. occidentalis Lowell Ahart 1997-7-11 7751 Butte South side of the dirt road, southeast of cCold 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
  CHSC82304  Camissoniopsis hirtella Lowell Ahart 2002-4-27 9552 Tehama About 10 yards northwest of the cattle guard, northwest of where the road is wide and one can park, on the west side of the dirt road that leads to the tower, east of Road M2, about 8 miles west of Paskenta. 609 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
  JEPS113508  Capsella bursa-pastoris Lowell Ahart 2007-5-14 13847 Yuba On dry red bare soil, east of the dirt road, about 20 yards northeast of the gate, about 20 yards south of the second power tower, about 30 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 35 Comment
  CHSC63243  Cardamine breweri Lowell Ahart 1994-6-17 7354 Plumas In a meadow on the east side of Sly Creek, about 1 mile north of Schwartz Meadow, about 1 mile east of Sly Creek Reservoir. 1097 Comment
  CAS-BOT-BC37884  Cardamine oligosperma Lowell Ahart 1983-3-24 3910 Butte Sutter Buttes. East bank of Woodleaf Creek above road, about 0.375 mile southwest of the Forbestown Reservoir. 450 Comment
  CHSC10645  Cardamine oligosperma Lowell Ahart 1969-3-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC82240  Cardamine oligosperma Lowell Ahart 2002-3-28 9453 Sutter On the bottom of a depression, on the east side of West Butte Road, about 1/4 mile north of the Sacramento Outing Club, Sutter Buttes. 24 Comment
  RSA715888  Cardamine oligosperma L. Ahart 2005-4-2 11684 Butte Overflow area on the E side of the Sacramento River, NW of Parrott Landing. About 1 mile SE of Ord Ferry. About 2 miles SE of Ordbend. About 12 miles (air) SW of Chico. 26 Comment
  UCD114532  Cardamine oligosperma L. Ahart 1974-2-25 304 Butte Peter Ahart Ranch in Honcut. 15 Comment
  JEPS105843  Cardamine pachystigma var. pachystigma Lowell Ahart 2004-5-3 10873 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 1243 Comment
  CDA42987  Cardaria pubescens L. Ahart 2008-8-25 15287 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. Comment
  CDA42896  Carduus pycnocephalus subsp. pycnocephalus L. Ahart 2012-6-5 18172 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
  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
  CHSC103118  Carex abrupta Lowell Ahart; John Dittes, Josephine Guardino 2009-7-21 16110 Plumas About 20 yards yeast of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 miles (air) southwest of Lake Almanor. 1302 Comment
  CHSC105510  Carex abrupta Lowell Ahart 2010-10-21 17304 Plumas On dry rocky soil, along a small wash, open dry meadow, about 80 yards northwest of the spring, on the north side of the road to Cleghorn Bar, about 2 miles by road west of the Quincy-La Porte Road, about 2 1/2 miles (air) northwest of Pilot Peak. 1928 Comment
  JEPS115897  Carex abrupta Lowell Ahart, John Dittes, Josephine Guardino 2009-7-21 16110 Plumas About 20 yards yeast of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 miles (air) southwest of Lake Almanor 1302 Comment
  CAS-BOT-BC17809  Carex amplifolia Lowell Ahart 1988-6-29 6100 Butte Along a small branch of Bean Creek, on the north side of Bean Creek Road, about 0.75 mile southeast of Little Bald Rock. 944 Comment
  CHSC108127  Carex angustata Lowell Ahart 2011-9-23 17699 Sierra Forest floor, about 80 yards north of Pass Creek, about 320 yards south of Henness Pass Road, west of French Meadow, east of Forest Road 70, about 3 miles (air) northwest of Weber Lake. 2016 Comment
  JEPS117604  Carex angustata Lowell Ahart 2010-9-9 17143 Plumas Large colony around and under fir trees, on the east side of East Branch Creek, on the east side of 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
  RSA700399  Carex angustata L. Ahart 2004-8-2 11327 Butte About 200 yards east of Keyser Creek, on the north side of the dirt county road, about 0.75 mile (air) NE of Oak Point, about 0.5 mile (air) west of Big Kimshew Creek, about 1.75 miles SE of Bald Mountain. 1453 Comment
  CHSC112685  Carex athrostachya Lowell Ahart; John Dittes 2013-6-9 18789 Shasta On the banks of a deep irrigation ditch, Hollenbeck Field, 950 feet east of Rat Farm Boat Launch, 3.4 air-miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  CHSC92298  Carex athrostachya Lowell Ahart; Josephine Guardino 2005-8-9 12254 Plumas In a small meadow and near a small drainage, between Lights Creek and Fant Creek, west of Forest Road 27N09, about 6 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1635 Comment
  JEPS113803  Carex athrostachya Lowell Ahart, John Dittes, Josephine Guardino 2007-6-8 14031 Plumas Strand of Lake Davis, southeast of the end of the road, north end of Lake Davis 1763 Comment
  JEPS121931  Carex aurea Lowell Ahart 2014-7-16 19677 Butte About 50 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CAS-BOT-BC19201  Carex barbarae Lowell Ahart 1977-5-20 s.n. Butte Sierra Nevada. Honcut. Peter Ahart Ranch. Along North Honcut Creek. 50 Comment
  CHSC100349  Carex bolanderi Lowell Ahart 2008-8-14 15205 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
  JEPS117694  Carex bolanderi L. Ahart 2010-6-12 16796 Butte North side of a small stream, about 150 yards east of Ten Mile House Road, about 3/4 air miles west of Highway 32, about 9 air miles northeast of Chico. 238 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
  JEPS113274  Carex cyrtostachya Lowell Ahart 2007-5-22 13912 Butte Along a small wash, on the northwest edge of a large bare granite opening (about an acre in size), northeast of Little Bald Rock, about 16 miles (air) northeast of Oroville 1009 Comment
  JEPS120128  Carex densa Lowell Ahart 2012-5-20 18095 Butte About 15 feet east of the Guardian Trail, southeast part of Upper Bidwell Park, northest of Chico. Comment
  SEINET7556729 Image available Carex densa Lowell Ahart 1987-5-10 5610 Butte Banks of Wyandotte Creek, 1/8 mile south of Central House Road, east of the Western Pacific Railroad, about 1 1/2 miles north and 1 mile west of Honcut, about 12 miles south of Oroville. 30 Comment
  CHSC111380  Carex divulsa subsp. divulsa Lowell Ahart 2012-4-30 17948 Butte On the north side of Big Chico Creek, Lost Park in Bidwell Park, city of Chico. 63 Comment
  JEPS120084  Carex divulsa subsp. divulsa Lowell Ahart 2012-5-25 18113 Butte Not maintained lawn, northwest of the intersection of W. Frances Willard Avenue and Arcadian Avenue, one block south of Chico High School, Chico. Comment
  JEPS107557  Carex douglasii Lowell Ahart 2005-7-31 12236 Nevada In a small meadow and near a small wash, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit 2062 Comment
  CHSC105832  Carex echinata subsp. echinata Lowell Ahart 2010-8-3 17039 Sierra On the north side of the road to Granite Mountain, north part of Harris Meadow, about 7 miles (air) northeast of Alleghany. 1793 Comment
  CHSC96875  Carex echinata subsp. echinata Lowell Ahart 2007-6-12 14078 Butte In shallow water (small spring), about 70 yards south of Bean Creek Road, about 1/4 mile (air) southeast of Little Bald Rock, about 15 miles (air) northeast of Oroville. 974 Comment
  JEPS95526  Carex feta Lowell Ahart 1994-6-5 7307 Yuba 3 air miles E of Forbestown (E side of Forbestown Road) 853 Comment
  CHSC113415  Carex fracta Lowell Ahart 2014-7-16 19678 Butte Northeast of a large wet meadow (some bog), about 50 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1638 Comment
  JEPS107618  Carex fracta Lowell Ahart, Josephine Guardino 2005-8-9 12289 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
  RSA795665  Carex gigas L. Ahart 2012-7-1 18262 Plumas East side 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
  CHSC96423  Carex gracilior Lowell Ahart 2007-4-16 13675 Butte On the west side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 2/3 miles east of Honcut, about 12 miles southeast of Oroville. 52 Comment
  JEPS104626  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
  JEPS95613  Carex gracilior Lowell Ahart 1994-4-29 7291 Butte 12 mi SE of Oroville (W side of North Honcut Creek, 2 1/2 mi N and 2 3/4 mi E of Honcut) 54 Comment
  JEPS110450  Carex integra Lowell Ahart 2006-8-15 13175 Butte N edge of a wet area W of a large open meadow and bog, about 20 yards E of the poor dirt road, about 100 yards S of the cabin, about 3/4 mile (air) NW of Jonesville, about 5 miles (air) NE of Butte Meadows. 1569 Comment
  RSA0119041  Carex integra Lowell Ahart 2014-7-7 19592 Butte On the south side of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1665 Comment
  CHSC116750  Carex jonesii Lowell Ahart; John Dittes 2015-8-5 20445 Tehama East side of Childs Meadow, 150 yards west of Highway 36, 0.69 air-miles east of Doe Mt., 9.77 air-miles south of Lassen Peak. 1498 Comment
  RSA700669  Carex lenticularis L. Ahart 2004-8-9 11354 Nevada 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 Bowman Lake. 2264 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
  CHSC108081  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
  CHSC81062  Carex lenticularis var. impressa Lowell Ahart 2001-8-8 9063 Nevada On the south bank of Catfish Lake, about 3 miles (air) south of the spillway of Jackson Meadow Reservoir. 1889 Comment
  SEINET12649537 Image available Carex leporinella Lowell Ahart 2010-1 17218 Butte 1918 Comment
  CAS-BOT-BC31488  Carex leptopoda Lowell Ahart 1982-7-28 3728 Sierra Near the dirt road N of the Pacific Mine, ca 5 mi E of La Porte. 1700 Comment
  CHSC110979  Carex multicaulis Lowell Ahart 2012-7-1 18249 Plumas About 200 yeards west of Caribuou Road, about 4 miles (air) northeast of Belden. 833 Comment
  RSA0115349  Carex multicaulis Lowell A. Ahart 2013-5-27 18709 Butte About 150 yards east of the intersection of Forbestown Road and Black Bart Road, about 3.25 miles (air) southwest of Forbestown. 764 Comment
  CHSC81064  Carex nebrascensis Lowell Ahart 2001-8-10 9069 Sierra Road gutter, on the east side of Hobart Mills Road, about 100 feet west of the power pole, about 1 mile (air) south of Stampede Reservoir. 1798 Comment
  CHSC94334  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
  JEPS115202  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
  CHSC61219  Carex nudata Lowell Ahart 1993-4-8 6932 Butte On the banks and sides of a deep almost dry ditch, on the south side of the Biggs Princeton Road, about 1 1/4 miles west of Biggs. 30 Comment
  CHSC84314  Carex nudata Lowell Ahart; John Dittes 2003-6-11 10268 Tehama On the south 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
  CHSC101954  Carex pellita Lowell Ahart; John Dittes 2009-7-27 16187 Plumas On dry soil, about 20 yards north of the poor dirt road, on the norht side of a small pond, headwaters of Grizzly Gulch, 2.1 miles (air) northeast of Butt Valley Reservoir Dam. 1479 Comment
  JEPS107626  Carex pellita Lowell Ahart, Josephine Guardino 2005-8-9 12283 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
  JEPS118273  Carex praegracilis Lowell Ahart, John Dittes 2011-6-20 17477 Lassen About 15 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
  JEPS127328  Carex rossii Lowell Ahart 2016-6-29 21052 Plumas About 1/2 mile southeast o 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. Comment
  JEPS120116  Carex sheldonii Lowell Ahart, John Dittes 2012-7-10 18306 Modoc 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. Comment
  JEPS100490  Carex simulata Lowell Ahart 2000-7-13 8586 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
  CHSC61511  Carex stipata var. stipata Lowell Ahart 1993-7-6 7051 Butte In a small meadow, on the north side of the dirt road, about 1/4 mile west of the Lost Creek Reservoir. 1036 Comment
  CHSC92304  Carex utriculata Lowell Ahart; John Dittes 2005-9-20 12446 Plumas In the center of Mud Lake, about 1/2 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2029 Comment
  JEPS106386  Carex utriculata Lowell Ahart 2004-8-2 11326 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
  JEPS124407  Carex utriculata Lowell Ahart, John Dittes 2015-8-6 20517 Tehama West side of 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 Mountain, 10.41 air-miles south of Lassen Peak. Comment
  JEPS127219  Carex utriculata Lowell Ahart 2016-8-30 21324 Plumas About 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, about 1 1/2 miles (air) southeast of Pilot Peak. Comment
  CDA34760  Carex vernacula L. Ahart 2010-9-28 17264 Butte On the south edge of a 10 acre meadow, about 100 yards east of Big Kimshew Creek, about 1 1/2 miles (air) northeast of Jones Meadow, about 2 1/2 miles (air) southeast of Philbrook Reservoir. Comment
  SEINET10894839  Carex vernacula Lowell Ahart 2010-9-28 Ahart 17264 Butte T25N, R5E, northeast 1/4 Section 29. On the south edge of a 10 acre meadow, about 100 yards east of Big Kimshew Creek, about 1 1/2 miles (air) northeast of Jones Meadow, about 2 1/2 miles (air) southeast of Philbrook Reservoir. 1886 Comment
  CAS-BOT-BC115181  Carex vernacula Lowell Ahart 1980-9-9 s.n. Sierra Rocky gorge between the outlet of Webber Lake and Little Truckee River. 2200 Comment
  CAS-BOT-BC249116  Castilleja affinis Lowell Ahart 1990-3-28 6430 Butte On the south side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville 39 Comment
  JEPS124001  Castilleja affinis subsp. affinis Lowell Ahart 2015-4-18 20047 Butte About 300 yards east of the bridge across Rocky Honcut Creek, about 8 1/2 miles (air) southeast of Oroville. Comment
  RSA726364  Castilleja applegatei L. Ahart, John Dittes, Josephine Guardino 2007-6-9 14054 Plumas About a mile (air) north of the north end of Lake Davis. 1858 Comment
  CHSC114979  Castilleja applegatei subsp. pinetorum Lowell Ahart 2015-4-13 20036 Butte On the southwest side of Rim Road, about 3 miles (air) north of Jarbo Gap, about 17-1/2 miles (air) north of Oroville. 907 Comment
  CHSC115270  Castilleja applegatei subsp. pinetorum Lowell Ahart 2015-5-9 20183 Sierra 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. Mixed Evergreen Forest. 692 Comment
  GH395181  Castilleja applegatei subsp. pinetorum L. Ahart 2015-4-18 20055 Unknown on the east side of the road to the Forbestown Reservoir, about 1/4 mile southwest of the Forbestown Reservoir, about 3 1/2 miles (air) northeast of Forbestown. T20N, R7E, Section 32 Comment
  GH395183  Castilleja applegatei subsp. pinetorum L. Ahart 2015-4-30 20135 Unknown on the east side of La Porte Road, about 2 1/4 miles (air) southwest of Brownsville, about 2 miles (air) northeast of Rackerby. T18N, R6E, near center of Section 4 Comment
  JEPS115168  Castilleja applegatei subsp. pinetorum Lowell Ahart, John Dittes 2009-7-15 16095 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
  CHSC47688  Castilleja arachnoidea Lowell Ahart 1975-10-1 642 Plumas On the west part of the Buzzards Roost Ridge, about 1 miles north of Pilot Peak. 1981 Comment
  CHSC36259  Castilleja attenuata L. Ahart 1982-4-23 3292 Sutter W part of Myers Ranch, Sutter Buttes. 50 Comment
  JEPS98283  Castilleja attenuata Lowell Ahart 2000-5-13 8349 Butte 5 air mi SW of Oroville (S side of the access rd to the boat ramp at the Thermolito Afterbay, W of Larkin Road, 1 1/4 mi S of the Oroville Airport) 42 Comment
  JEPS104019  Castilleja exserta subsp. exserta Lowell Ahart 2003-4-10 10086 Butte On the w side of a wash, near the south rim of South Table Mountain, ca 2 mi (air) n of Oroville. 302 Comment
  CHSC91456  Castilleja lacera Lowell 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. 759 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
  CHSC58956  Castilleja miniata Lowell Ahart 1992-7-17 6786 Sierra Along a logging road, about 2 (air) miles east of Quartz Point, about 6 (air) miles south-east of Downieville. 1706 Comment
  JEPS118430  Castilleja miniata subsp. miniata Lowell Ahart 2011-9-20 17684 Plumas Open area along a very small stream, on the north side of the poor dirt road on the north side of Pilot Peak, about 9 miles (air) northeast of La Porte 2072 Comment
  CHSC75817  Castilleja nana Lowell Ahart; Vernon H. Oswald 1999-7-26 8099 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
  UCD169353  Castilleja rubicundula Lowell Ahart 2013-5-1 18687 Colusa 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
  CHSC115196  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2015-4-28 20102 Lake Along a small meadow wash, small meadow, about 150 yards west of Barrel Spring Meadow, 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. 696 Comment
  JEPS106036  Castilleja subinclusa Lowell Ahart 2004-5-29 10962 Sutter Slope above a very steep (cliffs) draw, about 300 yards south of the fence on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter 304 Comment
  CHSC43562  Castilleja tenuis Lowell Ahart 1975-7-16 890 Plumas About 1/2 mile east of the Feather Fork Mine, about 6 miles north of La Porte. 1828 Comment
  CHSC92082  Castilleja tenuis Lowell Ahart 2005-7-31 12233 Nevada In a small meadow and near a small wash, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2062 Comment
  CHSC99131  Castilleja tenuis Lowell Ahart; John Dittes 2008-6-19 14874 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
  JEPS106309  Castilleja tenuis Lowell Ahart, John Dittes, Josephine Guardino, Robert Schlising 2004-6-14 11052 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
  CAS-BOT-BC195581  Catapodium rigidum Lowell Ahart 1976-7-4 s.n. Butte North Honcut Creek about 2 miles ne. of Honcut Comment
  CAS-BOT-BC40501  Caulanthus lasiophyllus Lowell Ahart 1983-5-7 3966 Butte Peter Ahart Ranch, about 1.5 miles north and 2 and 1/8 miles east of Honcut. 50 Comment
  RSA0035394  Caulanthus major var. nevadensis Lowell Ahart, John Dittes 2008-6-20 14920 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
  JEPS115256  Ceanothus cuneatus var. cuneatus Lowell Ahart, Josephine Guardino, Steve Green 2009-2-20 15486 Butte On a ridge about 300 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico 354 Comment
  CHSC111741  Celtis australis Lowell Ahart; Susan Bazell, Josephine Guardino, Wess Dempsey 2012-7-5 18264 Butte Cedar Grove, parking area, Lower Bidwell Park, Chico. 71 Comment
  CHSC112755  Centaurea cyanus Lowell Ahart; John Dittes 2013-7-24 18937 Modoc South bank of Ash Creek Canal, 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. 1268 Comment
  JEPS113265  Centaurea cyanus Lowell Ahart 2007-5-16 13893 Butte Between the road to Bear Ranch Creek and Highway 70, north of Bear Ranch Creek, about 1/4 mile southeast of the Shady Rest Area south of the Arch Rock Tunnel 463 Comment
  CHSC61294  Centaurea jacea Lowell Ahart 1993-8-8 7154 Butte On the west side of La Porte Road, about 2 miles south-west of Clipper Mills. 1066 Comment
  RSA767494  Centaurea repens L. Ahart, John Dittes 2010-8-31 17093 Modoc South of parking area west of old barn, on west side of Elkins Lane, Ash Creek State Wildlife Area, 320 feet north of Lassen County line, about 4.4 air miles west of Adin, about 7.2 air miles northeast of Bieber, Big Valley 1266 Comment
  CAS-BOT-BC277263  Centaurea solstitialis Lowell Ahart 1981-7-3 2887 Sutter South side of South Butte, near old gas well. Sutter Buttes 100 Comment
  JEPS104304  Centaurium muehlenbergii Lowell Ahart 2003-6-11 10243 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
  JEPS93837  Centaurium muehlenbergii Lowell Ahart 1998-7-1 8025 Butte about 7 air mi n of Oroville (about 100 yards s of a east west fence, about 5/8 mi n of the cow chute along Cherokee Road, North Table Mountain); North Table Mountain, Cherokee Road 403 Comment
  JEPS113452  Centromadia fitchii Lowell Ahart 2007-6-22 14210 Yuba Along a small wash, about 250 yards west of the power tower, about 100 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 29 Comment
  CHSC44471  Centromadia pungens Lowell Ahart 1977-10-3 1599 Sutter Near the edge of West Butte Road, on the west side of the Sutter Buttes. 30 Comment
  CHSC112822  Centromadia pungens subsp. pungens Lowell 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. 1267 Comment
  CHSC45958  Centunculus minimus Lowell Ahart 1975-6-19 795 Butte Along the edge of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  JEPS107784  Cerastium arvense Lowell Ahart, Richard Rabeler, Lawrence Janeway, Linnea Hanson 2005-4-20 11751 Plumas On the south side of Highway 70, about 200 yards southwest of Grizzly Creek, about 1 1/2 miles northeast of the Arch Rock Shady Rest Area 484 Comment
  CHSC65335  Cerastium fontanum subsp. vulgare Lowell Ahart 1995-10-3 7657 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
  CHSC103751  Cerastium glomeratum Lowell Ahart 2010-5-22 16723 Butte North of the road, about 100 yards west of the fence, about 1/4 mile east of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 387 Comment
  JEPS117507  Cerastium glomeratum Lowell Ahart 2010-5-22 16723 Butte North of the road, about 100 yards west of the fence, about 1/4 mile east of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville 387 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
  RSA712816  Cercis occidentalis L. Ahart 2006-5-5 12580 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. 561 Comment
  CAS-BOT-BC137000  Cercocarpus betuloides var. betuloides Lowell Ahart 1961-3-16 s.n. Butte Salmon Hole, Chico 300 Comment
  JEPS113640  Chamaesaracha nana Lowell Ahart, John Dittes 2007-6-16 14135 Plumas West of a small stream, on the south side of County Road 111 (Beckwourth Gensee Road), 10 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis 1647 Comment
  CHSC102826  Chamaesyce maculata Lowell Ahart 2009-7-3 15987 Butte On the east side of the road, 30 yards southeast of the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 100 yards east of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  CHSC81781  Chamaesyce maculata Lowell Ahart 2001-11-2 9399 Yuba Camp Far West Reservoir, about 1/4 mile northeast of the dam, about 9 miles (air) southeast of Wheatland. 83 Comment
  CHSC83041  Chamaesyce maculata Lowell Ahart 2002-10-9 9967 Yuba On the west bank of 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
  JEPS103340  Chamaesyce maculata Lowell Ahart 2002-10-9 9967 Yuba On the W bank of a small stream, below the high water line of Sly Creek Reservoir, ca 1/8 mile SW of the Day Camp, Sly Creek Reservoir. 1072 Comment
  RSA0112565  Chamaesyce maculata Lowell A. Ahart 2013-8-8 19013 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  SEINET10493564  Chamaesyce maculata Lowell Ahart 1984-8-19 Ahart 4784 Butte West of Pacific Heights Road, about 5 miles south-west of Oroville. Comment
  CHSC42958  Chamaesyce nutans Lowell Ahart 1987-7-3 5772 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS120775  Chamaesyce ocellata subsp. rattanii Lowell Ahart 2013-9-17 19048 Tehama Gravel bar on the south side of Burris Creek, strand of Black Butte Reservoir, about 1.5 miles SW of the dam, about 12 air miles NW of Orland. Comment
  CHSC112488  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-22 19186 Glenn Near an old homestead, strand of Stony Gorge Reservoir, about two miles south of the dam, about 17 miles (air) northwest of Willows. 248 Comment
  CHSC113181  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-11-30 19299 Yuba On the sides of a deep wash (Willow Glen Creek), northwest of Dry Creek, below the high water line of Collins Lake, about 100 yards north of Marysville Road, about 2 1/2 miles west of Oregon House. 356 Comment
  CHSC75965  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; Vernon H. Oswald 1999-8-13 8161 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
  JEPS121298  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-7-22 18847 Lassen W margin of duck field, about 30 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SBBG128254  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart, J. Dittes 2010-8-30 17054 Modoc N side of a small wash, ca. 10 yards W of the fence, S edge of the meadow, Ash Crk State Wildlife Area, 2300 feet N of Lassen County Line, ca. 3.6 mi W of Adin, ca. 8 mi NE of Bieber, Big Valley 1267 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
  CHSC97257  Chamerion angustifolium subsp. circumvagum Lowell Ahart; John Dittes 2007-8-9 14429 Plumas About 50 yards west of the poor dirt road, west slope of Mount Ingalls, about 6 miles (air) northwest of the north end of Lake Davis. 2551 Comment
  JEPS107523  Chamerion angustifolium subsp. circumvagum Lowell Ahart 2005-7-23 12182 Nevada Meadow, under the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  JEPS106109  Cheilanthes covillei Lowell Ahart 2004-5-29 10973 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
  CHSC117444  Cheilanthes gracillima Lowell Ahart 2016-6-29 21060 Plumas On the east side of Table Mountain, about 2 miles (air) northwest of Tamarack Flat, about 4 miles (air) northwest of Little Grass Valley Reservoir Dam. 1857 Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC45544  Chenopodium album Lowell Ahart 1976-6-27 1150 Butte At the old sheep barn, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/4 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  CHSC75994  Chenopodium album Lowell Ahart 1999-8-22 8184 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
  CHSC89441  Chenopodium album Lowell Ahart 2004-10-4 11430 Lake Below the high water line of Indian Valley Reservoir, near the stream in the northeast part of the reservoir, on the south side of Bartlett Springs Road. 446 Comment
  CHSC94440  Chenopodium album Lowell Ahart 2006-8-9 13120 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA703150  Chenopodium album L. Ahart 2004-10-4 11430 Lake Below the high water line of Indian Valley Reservoir, near the stream in the NE part of the reservoir, on the S side of Bartlett Springs Road. 447 Comment
  JEPS102327  Chenopodium berlandieri Lowell Ahart 2001-8-10 9074 Sierra about 1 1/4 mi NW of Stampede Reservoir Dam (Stampede Reservoir, about 1 mi SW of Henness Pass Road) 1810 Comment
  JEPS110530  Chenopodium botrys Lowell Ahart 2006-10-23 13472 Plumas On the east side of Slate Creek (there is a large gravel flat caused by the dam), where the road ends, about 50 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
  CHSC45551  Chenopodium californicum Lowell Ahart 1977-4-10 1288 Sutter Growing on rock cliffs, on the west side of the South Butte, Sutter Buttes. 457 Comment
  JEPS122016  Chenopodium californicum Lowell Ahart 2014-5-8 19454 Tehama About 1/10 mile east of the restroom, about 50 yards north of the paved road past Berris Creek, east of Berris Creek, south of Black Butte Reservoir, about 12 miles (air) southwest of Corning. Comment
  CHSC89387  Chenopodium rubrum Lowell Ahart 2004-10-4 11431 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. 446 Comment
  JEPS114681  Chenopodium strictum var. glaucophyllum Lowell Ahart 2008-7-23 15147 Butte N edge of the South Fork of the Feather River, about 10 yds E of where Sucker Creek enters the South Fork of the Feather River, below the high water line of Lake Oroville, about 1/4 mi W of the Ponderosa Dam 258 Comment
  UC1609417  Chimaphila menziesii Lowell Ahart 1993-7-29 7129 Butte ca. 6 1/2 mi. n.e. Stirling City (ca. 1/8 mi. s.w of Snow Mine, ca. 2 1/2 mi. e. of Bald Mt.) 1463 Comment
  RSA699613  Chloris virgata L. Ahart 2004-6-28 11147 Butte on the east side of Lone Tree Road, about 1/2 mile north of Palermo Road, about 1 1/2 miles (air) northwest of Palermo, about 5 miles (air) south of Oroville. 44 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
  CHSC99754  Chondrilla juncea Lowell Ahart 2008-7-23 15151 Butte On the north side of Ponderosa Way, north of the waterfall, about 1 mile (air) southwest of the Ponderosa Dam, about 2 1/4 miles (air) northwest of Forbestown. 482 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
  CHSC87372  Chorizanthe membranacea Lowell Ahart 2004-5-2 10850 Sutter On a mountainside, on the west side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter. 551 Comment
  SD122528  Chorizanthe membranacea Lowell Ahart 1984-5-21 4629 Sutter On the south side of the South Butte, Sutter Buttes, west of marysville, road cut Comment
  CHSC45495  Chorizanthe polygonoides Lowell Ahart 1979-5-7 1862 Butte East of Kunkle Creek, about 1/8 mile north-east of Kunkle Reservoir, about 2 1/2 miles south-east of Paradise. 472 Comment
  CHSC108094  Chrysothamnus nauseosus subsp. albicaulis Lowell Ahart 2011-9-17 17676 Plumas On the west side of Lumpkin Ridge Road, about 2 miles (air) west of Little Grass Valley Reservoir Dam. 1687 Comment
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Oct 18 2017
  RSA795594  Chrysothamnus nauseosus subsp. consimilis L. Ahart, John Dittes 2010-8-30 17052 Modoc About 3 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
  JEPS117374  Chrysothamnus viscidiflorus subsp. viscidiflorus Lowell Ahart, John Dittes 2010-8-30 17061 Modoc Near the homestead, about 100 yards east of the fence, 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
  CHSC116638  Cicendia quadrangularis Lowell Ahart 2016-4-15 20748 Butte On the west side of Swedes Flat Road, about 1/2 mile southwest of Dutch Ravine, about 8 miles (air) southeast of Oroville. 384 Comment
  CHSC31736  Cicendia quadrangularis L. Ahart 1974-4-7 353 Butte In fields. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC42911  Cicuta douglasii Lowell Ahart 1987-7-17 5838 Butte Along the edge of the North Fork of the Feather River, near the Poe Power House, about 2 miles south- east of Jarbo Gap. 274 Comment
  JEPS95459  Cinna latifolia Lowell Ahart 1994-7-28 7536 Plumas SW of Bucks Lake (NE of Frenchman Hill) 1706 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
  JEPS117499  Cirsium arvense Lowell Ahart, John Dittes 2010-8-31 17105 Modoc About 20 yards west of Elkins Lane, about 150 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 1274 Comment
  CHSC97525  Cirsium scariosum Lowell Ahart; John Dittes 2007-6-16 14117 Plumas East of a 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
  CAS-BOT-BC228761  Cistanthe umbellata Lowell Ahart 1983-7-29 4247 Butte About 2 miles east of Milsap Bar, about 25 miles north-east of Oroville 900 Comment
  CHSC103681  Clarkia arcuata Lowell Ahart 2010-4-30 16590 Butte Below rim, 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
  JEPS115984  Clarkia gracilis subsp. albicaulis Lowell Ahart 2009-6-3 15823 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
  JEPS105877  Clarkia gracilis subsp. gracilis Lowell Ahart 2004-4-29 10807 Tehama ca. 1/8 mi SE of an unnamed lake, along Nomalaki Trail, ca. 3/4 mi by trail NW of Dead Rabbit Lake, ca. 1 1/2 mi NW of Bowers Creek, ca. 2 1/4 mi NW of Forest Rd 23N69 (Mud Flat Rd), ca. 8 mi (air) SW of Paskenta 535 Comment
  CAS-BOT-BC171882  Clarkia gracilis subsp. gracilis Lowell Ahart 1980-5-17 2286 Butte 1/2 mile south-east of Hurleton, Sierra Nevada 600 Comment
  CHSC80668  Clarkia lassenensis Lowell Ahart 2001-6-16 8850 Tehama North 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
  CHSC84139  Clarkia purpurea subsp. quadrivulnera Lowell Ahart 1983-6-12 4036 Butte About 1 mile south of Crystal Hill, near Oregon Gulch, near Lake Oroville, about 7 miles south-west of Feather Falls. 425 Comment
  JEPS122061  Clarkia purpurea subsp. quadrivulnera Lowell Ahart, John Dittes 2014-5-17 19505 Tehama About 50 yards west of the diversion dam on Mill Creek, about 5 miles (air) northeast of Los Molinos. Comment
  CAS-BOT-BC164793  Clarkia rhomboidea Lowell Ahart 1984-5-28 4651 Butte Along Old Highway 40, now Dark Canyon Road, about 2 miles east of Old Yankee Hill, about 16 miles north-east of Oroville 450 Comment
  CAS-BOT-BC165438  Clarkia unguiculata Lowell Ahart 1989-5-31 6333 Butte North of the end of Truex Road, near Lake Oroville, about 1/4 mile north-west of the West Branch Bridge across Lake Croville 304 Comment
  SEINET10453172  Clarkia unguiculata Lowell Ahart, Peter Ahart 1983-6-30 Ahart 4170 Butte T21N R4E ne sec 11. Dark Canyon, along old Hwy 40, ca. 4 mi s of Jarbo Gap, ne of Oroville. Foothill Woodland; 350 m. 350 Comment
  CAS-BOT-BC439112  Claytonia exigua subsp. exigua Lowell Ahart 1982-5-8 3418 Butte About 1/2 mile south-west of the Forbestown Res., about 4 1/2 miles north-east of Forbestown 800 Comment
  SEINET10572685  Claytonia heterophylla Lowell Ahart 1983-8-16 Ahart 4289 Butte T26N R4E nw section 28. Along a small stream that flows into Butte Creek, ca. 1 mi east of Butte Meadows. Yellow Pine Forest; 1450 m. 1450 Comment
  CHSC46725  Claytonia parviflora subsp. parviflora Lowell Ahart 1978-4-19 1653 Butte Along the trail to Feather Falls, north of Frey Creek, about 3 miles north of Feather Falls. 548 Comment
  JEPS107415  Claytonia parviflora subsp. parviflora Lowell Ahart, Paul Maslin, John Dittes 2005-3-17 11651 Butte Big Chico Creek Ecological Reserve. South of the fence, on the east side of the very poor dirt road, about 1/8 mile northwest of the Indian Cave, about 3/4 mile west of Big Chico Creek, about 4 1/2 miles (air) northeast of Chico 481 Comment
  CHSC46727  Claytonia perfoliata subsp. perfoliata Lowell Ahart 1981-4-6 2739 Sutter Sutter Buttes. Gorwing on the ridge east of the large rock outcropping and the old homestead, on the south side of the South Butte. 335 Comment
  JEPS115238  Claytonia perfoliata subsp. perfoliata Lowell Ahart 2009-4-3 15534 Butte Along the north margin of the paved road, north of the Cedar Grove parking area in Lower Bidwell Park, Chico 67 Comment
  CHSC108022  Claytonia rubra subsp. rubra Lowell Ahart; John Dittes 2011-6-20 17486 Lassen About 15 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
  CAS-BOT-BC91537  Clematis lasiantha Lowell Ahart 1985-5-5 4923 Sutter Dean Ranch, Sutter Buttes. Near the west fence, south of Huff Canyon, about 0.75 mile west of the Dean Cabin. 250 Comment
  JEPS95533  Clintonia uniflora Lowell Ahart 1994-6-17 7345 Plumas E side of Sly Creek, 1 mi N of Schwartz Meadow, 1 mi E of Sly Creek Reservoir 1097 Comment
  UC1521808  Collinsia sparsiflora var. collina Lowell Ahart 1984-4-3 4537 Butte 1 mi N, 2.7 mi E of Honcut; Peter Ahart Ranch, N Honcut Creek 50 Comment
  JEPS126581  Collinsia tinctoria Lowell Ahart, John Dittes 2016-6-22 21039 Tehama 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. 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
  CHSC44311  Collomia grandiflora Lowell Ahart 1979-7-18 1991 Plumas Along Cleghorn Bar Road, about 2 miles west of Pilot Peak, about 15 miles north of La Porte. 1645 Comment
  CHSC69048  Collomia tinctoria Lowell Ahart 1997-8-1 7799 Butte Along the edge of the dirt road and north of the camps along Little Kimshew Creek, about 1/4 mile north of the County Road, east of Bald Mountain, about 8 miles (air) northeast of Stirling City. 1219 Comment
  RSA755468  Collomia tinctoria L. Ahart, John Dittes, Josephine Guardino 2009-6-14 15852 Plumas Cut bank of Forest Road 27N01Y, about 1.3 air miles W of Lake Almanor Dam. 1463 Comment
  CAS-BOT-BC286066  Conyza canadensis Lowell Ahart 1986-10-16 5407 Butte Near the Enterprise Launch Area parking lot, near Lake Oroville, about 1/4 mile south-west of Lumpkin Road, north-east of Oroville 292 Comment
  CDA34750  Conyza canadensis L. Ahart, John Dittes 2010-10-4 17294 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
  RSA769191  Conyza floribunda L. Ahart 2009-10-12 16419 Napa At the high water line of Lake Berryessa, along Capell Creek east 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
  JEPS94958  Cordylanthus pilosus subsp. trifidus Lowell Ahart 1997-8-13 7847 Nevada ca. 1.5 mi. w. Penn Valley (along sides of Penn Valley Rd., just e. of intersection of Indian Springs Rd. & Penn Valley Rd., just s. of Hwy. 20) 426 Comment
  CHSC42097  Cordylanthus tenuis subsp. tenuis Lowell Ahart 1986-7-25 5377 Plumas About 1 1/2 miles west of Swamill Flat, about 4 1/2 miles west of Finger Board, about 7 miles north-west of Pilot Peak. 1767 Comment
  CHSC115573  Cordylanthus tenuis subsp. viscidus Lowell Ahart; John Dittes 2015-8-6 20496 Tehama Northwest of the pond, north side of the camping area, west side of 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
  CHSC69138  Cornus sessilis Lowell Ahart 1997-8-7 7821 Yuba On sides of small stream, a branch of Little Oregon Creek, on the south side of the dirt road, Peterson Ridge Road, about 3 miles (air) southeast of Challenge. 762 Comment
  CAS-BOT-BC401857  Corydalis caseana subsp. caseana Lowell Ahart 1983-8-16 4301 Butte About 1 mile east of Butte Meadows 1450 Comment
  CHSC113201  Crassula aquatica Lowell Ahart 2014-4-16 19364 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. 29 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
  CAS-BOT-BC427692  Crassula connata Lowell Ahart 1982-3-20 3260 Sutter On the steep south side of North Butte, north of the Dean Cabin, Dean Ranch, Sutter Buttes 350 Comment
  SEINET10973379  Crassula muscosa Lowell Ahart 1983-5-4 Ahart 3940 Sutter Along edge of Pass Rd, ca. 4 mi w of Kellogg Rd, Sutter Buttes. Valley Grassland. West of Marysville. 50 Comment
  CHSC113220  Crassula tillaea Lowell Ahart 2014-5-2 19424 Butte On the north side of a small drainage, about one mile (air) northwest of the Improved Parking Area and Cherokee Road, North Table Mountain, about 8 miles (air) north of Oroville. 391 Comment
  CAS-BOT-BC427954  Crassula tillaea Lowell Ahart 1990-1-17 6407 Butte East of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprise Bridge across Lake Oroville 301 Comment
  CDA32002  Crataegus laevigata L. Ahart 2009-5-3 15792 Butte On the east side of Big Chico Creek, about 30 yards south of the gate about 10 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 Comment
  CHSC110990  Crataegus monogyna Lowell Ahart 2012-5-17 18084 Butte On both sides of the horse trail, between the paved park road and the poor dirt road, between Table 21 and Larch, Lower Bidwell Park, Chico. 73 Comment
  CHSC102071  Crepis acuminata Lowell Ahart; John Dittes 2009-7-15 16098 Plumas On dry rocky soil, east of the power line, on the south side of Forest Sevice Road 26N22, about 2.3 miles (air) southeast of Butt Valley Reservoir Dam. 1517 Comment
  CAS-BOT-BC290528  Crepis capillaris Lowell Ahart 1988-6-29 6092 Butte East of Galen Ridge Road, about 1/2 mile east of the Oroville Quincy Highway, north of Lake Madrone 621 Comment
  CHSC93561  Crepis intermedia Lowell Ahart; John Dittes 2005-6-1 11918 Lassen Long Valley, on the east side of a poor dirt road, about 4 1/2 miles (air) north of the interesection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  JEPS107848  Crepis intermedia Lowell Ahart, John Dittes 2005-6-1 11918 Lassen Long Valley, on the east side of a poor dirt road, about 4 1/2 miles (air) north of the interesection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  CAS-BOT-BC376469  Crepis pleurocarpa Lowell Ahart 1988-7-28 6139 Butte Hillside at the north side of the dam at Lost Creek Reservoir 1036 Comment
  JEPS107791  Crepis pleurocarpa Lowell Ahart, John Dittes 2005-6-2 11934 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 Colusa Along Squaw Creek, just south 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
  JEPS127020  Crucianella angustifolia Lowell Ahart 2016-6-4 20920 Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. Comment
  SEINET10500613  Crucianella angustifolia Lowell Ahart 1984-6-8 Ahart 4681 Butte Along the edge of the dirt road, the road forks here and one goes to Feather Falls and the other to Lumpkin Ridge Rd, ca. 3 mi NE of Ponderosa Dam, ca. 3 mi N of Forbestown; Yellow Pine Forest. 500 Comment
  CHSC81642  Crypsis alopecuroides Lowell Ahart 2001-10-8 9333 Plumas Sand bar, 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
  CDA1929  Crypsis schoenoides L. Ahart 2002-10-17 10000 Butte About 1 1/2 miles south of Highway 162 (Oroville Quincy Highway), about 3 miles (air) northeast of Oroville Dam. On the gentle hills below the high water line of Lake Oroville. Comment
  CHSC69734  Crypsis schoenoides Lowell Ahart 1997-10-24 7940 Butte About 20 yards north of the South Fork of the Feather River and on the east side of Sucker Creek, strand of Lake Oroville, about 1/4 mile west of the Ponderosa Dam. 274 Comment
  SEINET10518386  Crypsis vaginiflora Lowell Ahart 1982-1 Ahart 3673 Unknown On dry bare soil on bottom of dry puck pond, ca. 1/4 mi se of HQ, Graylodge Wildlife Refuge, ca. 13 mi sw of Gridley. Very common. 35 Comment
  CHSC58890  Cryptantha affinis Lowell Ahart 1992-7-29 6871 Butte About 1 mile north-east of the Carr Mine, about 3/4 mile north-west of Lotts Lake. 1798 Comment
  CHSC63118  Cryptantha affinis Lowell Ahart 1994-7-7 7459 Sierra North side of the Pacific Crest Trail, on Bunker Hill Ridge, about 3/4 mile (air) south of Pilot Peak. 2011 Comment
  RSA726381  Cryptantha affinis L. Ahart, Josephine Guardino 2007-7-21 14374 Plumas About 2 1/4 miles (air) northwest of the most northwest part of Lake Davis. 1814 Comment
  CHSC84119  Cryptantha crinita Lowell Ahart; John Dittes 2003-5-12 10126 Tehama Along a wash, on the northwest side of the poor dirt road, just north of Jelly Ferry Road, 1.3 miles (air) southwest of Coleman Fish Hatchery, about 6.0 miles (air) east of Cottonwood. 131 Comment
  UC1442624  Cryptantha crinita Lowell Ahart 1979-4-25 Tehama 6.4 mi n Red Bluff (on gravel bars along Blue Tent Creek (take dirt road branching of McCoy Road)); Blue Tent Creek 150 Comment
  CHSC83879  Cryptantha flaccida Lowell Ahart; John Dittes, Daphne Christopher, Hannah Stevens 2003-4-17 10112 Tehama Along the trail, on the north side of Dye Creek, about 1/2 mile east of the Dye Creek buildings, Dye Creek Preserve, about 6 miles (air) northeast of Los Molinos. 174 Comment
  CHSC91345  Cryptantha flaccida Lowell Ahart; John Dittes 2005-6-9 12022 Siskiyou Pasture field, on the east side of a poor rock fence, about 350 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
  JEPS118091  Cryptantha flaccida Lowell Ahart 2011-6-7 17386 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
  SEINET10497605  Cryptantha hendersonii Lowell Ahart 1983-5-28 Ahart 4020 Butte Along trail to Feather Falls, ca. 5 mi n of the town of Feather Falls. Yellow Pine Forest; 600 m. 600 Comment
  JEPS103424  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
  SEINET10497283  Cryptantha rostellata Lowell Ahart 1984-5-18 Ahart 4606 Butte T17N R4E. Peter Ahart Ranch, ca. 1.5 mi NE of Honcut, ca. 12 mi S of Oroville. Valley Grassland; 50 m. 50 Comment
  CHSC43470  Cryptantha torreyana Lowell Ahart 1977-7-9 1453 Plumas Near a small meadow, near the South Fork of the Feather River, about 1/2 mile north of the Feather Fork Mine, about 6 miles north of La Porte. 1706 Comment
  CHSC63120  Cryptantha torreyana Lowell Ahart 1994-7-7 7456 Plumas Plumas and Sierra Counties. On the north side of the Pacific Crest Trail, on Bunker Hill Ridge, about 3/4 mile (air) south of Pilot Peak. 2011 Comment
  JEPS115121  Cryptantha torreyana Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16223 Plumas On amp bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam 1591 Comment
  CHSC113400  Cryptantha torreyana var. torreyana Lowell Ahart 2014-7-7 19565 Butte About 5 yards east of the Skyway, about one-mile north of Stirling City. 1142 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
  UC1594732  Cuscuta californica Lowell Ahart 1992-7-26 6858 Butte 2 air mi se Snow Mountain (about 0.25 mi se of Carr Mine) 1798 Comment
  CHSC94424  Cuscuta californica var. breviflora Lowell Ahart 2006-8-15 13199 Tehama East of Colby Creek, west of the poor dirt road, about 3/4 mile northwest of the Snowmobile Area, about 1 1/4 miles (air) northwest of Jonesville, about 4 3/4 miles (air) northeast of Butte Meadows. 1503 Comment
  CHSC71460  Cuscuta californica var. californica Lowell Ahart 1998-7-19 8048 Butte Along Hurleton Swedes Flat Road, 1 1/2 miles (air) south of Hurleton, about 11 miles (air) southeast of Oroville. 487 Comment
  JEPS115098  Cuscuta californica var. papillosa Lowell Ahart, John Dittes 2009-7-14 16072 Plumas North of Forest Service Road 26N92, about 1.9 miles (air) southeast of Seneca, about 6 miles (air) south of Lake Almanor Reservoir Dam 1677 Comment
  UC1594627  Cuscuta campestris Lowell Ahart 1992-5-23 6772 Butte about 2 mi w Biggs (on the n side of Biggs Princeton Road) 30 Comment
  CHSC78509  Cuscuta pentagona Lowell Ahart 2000-8-28 8668 Butte West edge of a large man made lake, Oroville Wildlife Area, about 1/2 mile west of Oak Grove and Highway 70, about 6 miles (air) southwest of Oroville. 42 Comment
  CHSC97748  Cuscuta pentagona Lowell Ahart 2007-11-13 14592 Placer On Xanthium strumarium, 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. 73 Comment
  CHSC80811  Cynoglossum officinale Lowell Ahart 2001-7-17 8910 Plumas Meadows, on the sides 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
  CHSC109631  Cynosurus echinatus Lowell Ahart 2012-5-14 18067 Butte On the south side of the paved road, west of the horse trail, about 1/2 mile west of Peterson Drive, south of Vallombrosa Ave, Lower Bidwell Park, Chico. 74 Comment
  JEPS119863  Cynosurus echinatus Lowell Ahart 2012-5-14 18067 Butte On the south side of the paved road, west of the horse trail, about 1/2 mile west of Peterson Drive, south of Vallombrosa Avenue, Lower Bidwell Park, Chico. Comment
  RSA0112645  Cyperus acuminatus Lowell Ahart 2013-8-8 19005 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  JEPS103301  Cyperus difformis Lowell Ahart 2002-9-7 9930 Butte On the E side of Cherokee Road, N of the Thermalito Diversion Canal, on the W side of the water purification pond, ca 1 mile N of Oroville. 130 Comment
  JEPS120685  Cyperus difformis Lowell Ahart 2013-10-19 19157 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
  SEINET10466975  Cyperus difformis Lowell Ahart 1983-9-4 Ahart 4410 Sutter Under the power line, near and along the road, ca. l.5 mi se of the Dean Cabin, Dean Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 270 m. 270 Comment
  CAS-BOT-BC114521  Cyperus eragrostis Lowell Ahart 1977-7-24 s.n. Sutter South side of South Butte, Sutter Buttes. 121 Comment
  CHSC76299  Cyperus eragrostis Lowell Ahart 1999-9-21 8272 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
  CHSC88268  Cyperus eragrostis Lowell Ahart; Samantha Mackey Hillaire 2004-7-9 11185 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
  CHSC96938  Cyperus eragrostis Lowell Ahart 2007-6-30 14229 Yuba Sides of a small wash, about 250 yards west of the power tower, about 100 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 29 Comment
  JEPS113718  Cyperus eragrostis Lowell Ahart 2007-6-30 14229 Yuba Sides of a small wash, about 250 yards west of the power tower, about 100 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 29 Comment
  RSA754819  Cyperus eragrostis L. Ahart 2009-6-30 15968 Butte E side of Ten Mile House Road, about 30 yards E of Big Chico Creek, Upper Bidwell Park, about 3/4 air miles W of Highway 32, about 10 miles NE of Chico. 234 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
  JEPS115780  Cyperus erythrorhizos Lowell Ahart 2009-10-27 16496 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
  CHSC76113  Cyperus esculentus Lowell Ahart 1999-9-5 8195 Yuba On the disturbed area on the south side of Woodruff Lane, just west of Kimball Lane, about 5 miles (air) northeast of Marysville. 24 Comment
  CHSC23371  Cyperus flavescens Lowell Ahart 1975-9-11 Yuba Pasture on the Eugene Ahart Ranch in Marysville. 30 Comment
  SEINET227301  Cyperus niger Lowell Ahart 1983-9-17 4432 Butte Ca. 1/8 mile NE of Kunkle Reservoir S of Paradise 600 Comment
  CAS-BOT-BC113851  Cyperus niger var. capitatus Lowell Ahart 1979-9-8 s.n. Butte Ca. 6 mi. N of Oroville. 200 Comment
  CHSC71266  Cyperus squarrosus Lowell Ahart 1998-7-1 8027 Butte About 100 yards south of a east west fence, about 5/8 mile north of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  CHSC81168  Cyperus squarrosus Lowell Ahart; Vernon H. Oswald 2001-8-22 9174 Glenn On the strand and on the west side of Black Butte Reservoir, about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte Reservoir. 140 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
  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
  UC1594527  Cystopteris fragilis Lowell Ahart 1992-7-26 6835 Butte ca. 2 air mi s of Snow Mt (s side of Coon Hollow, ca. 1/2 mi n of Carr Mine) 1737 Comment
  SEINET10935015  Danthonia californica Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4093 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
  CHSC76402  Datisca glomerata Lowell Ahart; Vernon H. Oswald 1999-10-3 8289 Butte 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
  JEPS102375  Delphinium glaucum Lowell Ahart 2001-8-14 9125 Nevada E of the dirt road to Sawmill Lake, S of Prairie Creek, aabout 1/4 mi S of campgrounds and buildings at the E end of Bowman Lake 1737 Comment
  JEPS87747  Delphinium gracilentum Lowell Ahart 1994-6-15 7336 Plumas near intersection of Lumpkin Ridge Rd and rd to Tamarack Flat (about 200 yds e of a logging road, about 1 air mi w of Little Grass Valley Reservoir) 1767 Comment
  CHSC40321  Delphinium nudicaule Lowell Ahart 1985-5-5 4919 Sutter Near the west fence, south of Huff Canyon, about 3/4 mile west of the Dean Cabin, Dean Ranch, Sutter Buttes. 250 Comment
  CAS-BOT-BC116122  Delphinium nuttallianum Lowell Ahart 1989-7-2 6357 Plumas North of where the dirt road forks, the south fork leads to the Lookout on Pilot Peak, about 2103 Comment
  CHSC69120  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 1997-8-1 7770 Butte On the bottom of Little Kimshew Creek, Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 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
  CHSC92109  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2005-7-23 12169 Nevada Along a small wash, open meadow, under the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20. 1572 Comment
  UCD62955  Deschampsia danthonioides L. Ahart 1977-4-29 1339 Butte Peter Ahart Ranch, Honcut. 50 Comment
  HSC100813  Deschampsia elongata Lowell Ahart 2008-9-10 15369 Plumas Bottom of East Branch Creek, E side of Quincy La Porte Rd., 1 3/4 air mi. S of Little Grass Valley Reservoir, 1 mi. NE of La Porte. 1594 Comment
  JEPS110346  Deschampsia elongata Lowell Ahart 2006-6-11 12719 Glenn About 50 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
  CHSC31700  Desmazeria rigida L. Ahart 1979-4-28 1852 Butte Along a wash near the old tunnel gold mine. Peter Ahart Ranch, Honcut. 50 Comment
  CAS-BOT-BC254524  Dichanthelium acuminatum subsp. acuminatum Lowell Ahart 1983-6-26 4138 Butte Along Ponderosa Way, ca. 14 miles NE of Oroville. Along the edges of the E Fork of Canyon Creek 500 Comment
  JEPS98294  Dichanthelium acuminatum subsp. fasciculatum Lowell Ahart 2000-6-27 8514 Butte Big Bald Rock, about 3 miles (air) east of Madrone Lake, about 12 miles (air) northeast of Oroville. 993 Comment
  CAS-BOT-BC501073  Dichelostemma multiflorum Lowell Ahart 1982-4-24 3377 Sutter 3/4 mile southwest of the Myers home, Myers Ranch, Sutter Buttes 50 Comment
  SEINET10839402  Dichelostemma multiflorum Lowell Ahart 1983-9-4 Ahart 4374 Sutter Dean Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 250 m. 250 Comment
  JEPS128642  Dieteria canescens var. shastensis Lowell Ahart, John Dittes 2017-7-19 21580 Nevada About 100 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
  CHSC43280  Digitaria ischaemum Lowell Ahart 1987-8-30 5870 Butte Road gutter, along Highway 70, about 1/8 mile west of Big Bend Road, about 1 1/2 miles south-west of Jarbo Gap. 655 Comment
  CHSC69525  Digitaria ischaemum Lowell Ahart 1997-9-11 7907 Plumas On the west edge of Caribou Road, on the west side of the North Fork of the Feather River, about 1/2 mile south of Mosquito Creek, about 4 1/2 miles (air) northeast of Belden. 792 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
  CHSC81846  Digitaria sanguinalis Lowell Ahart 2001-11-2 9408 Yuba Camp Far West Reservoir, about 1/4 mile northeast of the dam, about 9 miles (air) southeast of Wheatland. 83 Comment
  CHSC97734  Digitaria sanguinalis Lowell Ahart 2007-11-3 14568 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
  CHSC10601  Diplacus douglasii Lowell Ahart 1961-3-16 Butte Salmon Hole. 91 Comment
  CHSC43556  Diplacus grandiflorus Lowell Ahart 1977-4-28 1325 Butte Along the edge of Ponderosa Way, near the Ponderosa Dam, about 2 miles north-west of Forbestown. 457 Comment
  CHSC41897  Diplacus kelloggii Lowell Ahart 1975-3-27 724 Butte Along Swedes Flat Road, about 1/8 mi e of the bridge across Rocky Honcut Creek, ne of Bangor. 304 Comment
  CHSC47500  Diplacus kelloggii Lowell Ahart 1973-3-24 183 Butte On the north side of Swedes Flat Road, about 1/4 mile east of the bridge across Rocky Honcut Creek, north of Bangor. 487 Comment
  CHSC87961  Diplacus layneae Lowell Ahart 2004-6-18 11101 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
  CHSC94637  Diplacus layneae Lowell Ahart 2006-6-11 12664 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
  CHSC37269  Diplacus mephiticus L. Ahart 1982-6-15 3584 Butte Ca. 1.5 mi e of Camp 18, ca. 8 mi e of Feathe Falls. 1000 Comment
  CHSC44358  Diplacus tricolor Lowell Ahart 1988-4-29 5969 Butte On the Joie Osgood Ranch, about 2 miles north and 2 1/2 miles east of Honcut, about 12 miles south-east of Oroville. 76 Comment
  CHSC84284  Distichlis spicata Lowell Ahart; John Dittes, Josephine Guardino, Steve Green 2003-5-27 10223 Butte About 100 yards west of the dirt road, west of Diversion Dam on Big Chico Creek, west of Parking Area L, Upper Bidwell Park, about 3 1/2 miles east of Manzanita Avenue, Chico. 121 Comment
  JEPS117163  Dittrichia graveolens Lowell Ahart, John Dittes 2010-10-5 17302 Plumas On the north side of Highway 70, Serpentine Canyon, 2.7 miles (air) east-northeast of Rich Bar, 3.9 miles (air) west of Twain 813 Comment
  SBBG125743  Dittrichia graveolens L. Ahart with J. Dittes 2010-10-5 17302 Plumas N side of Hwy 70, Serpentine Cyn, 2.7 mi ENE of Rich Bar, 3.9 mi W of Twain Comment
  CHSC43306  Dodecatheon alpinum Lowell Ahart 1977-7-15 1470 Sierra About 12 miles northeast of La Porte, on the north side of Mt. Fillmore, along a small stream in a small mountain meadow. 2133 Comment
  SEINET10449638  Dodecatheon clevelandii subsp. patulum Lowell Ahart 1984-3-24 Ahart 4510 Sutter Myers Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 50 m. 50 Comment
  CHSC112599  Dopatrium junceum Lowell Ahart 2013-9-20 19058 Butte Along a ditch, about 100 yards west of the railroad, about 400 yards south of the Rice Experiment Station buildings, about 2 miles southeast of Richvale. 30 Comment
  CHSC109675  Downingia bacigalupii Lowell Ahart; John Dittes 2012-7-10 18322 Modoc Along the sides and bottom 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
  SEINET3450899  Downingia cuspidata Lowell Ahart, John Dittes 2003-5-12 10142 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 250 yards south of the barn 260 Comment
  CHSC32077  Draba albertina L. Ahart 1975-7-13 878 Sierra In meadow, Ahart Camp, in French Meadows, 3 mi w of Webber Lake. 2133 Comment
  UC1586489  Draba albertina Lowell Ahart 1991-7-22 6673 Sierra about 1/4 mi s Henness Pass Road (about 3 mi nw of Webber Lake); French Meadow 2133 Comment
  UCD115555  Draba verna L. Ahart 1973-11-21 150 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC101077  Draba verna var. aestivalis Lowell Ahart; John Dittes 2009-3-20 15503 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
  JEPS115702  Drymocallis glandulosa var. glandulosa Lowell Ahart, John Dittes, Josephine Guardino 2009-6-14 15864 -B Plumas North of cut bank of Forest Road 27N01Y, about 1.3 miles (air) west of Lake Almanor Dam 1462 Comment
  JEPS128749  Drymocallis glandulosa var. reflexa Lowell Ahart, John Dittes, Josephine Guardino 2017-6-27 21446 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
  JEPS110146  Drymocallis lactea var. austiniae Lowell Ahart 2006-6-28 12870 Sierra About 3/4 mile (air) east of Lake Delahunty, about 2 miles (air) northeast of Gibsonville 1784 Comment
  CHSC90204  Dryopteris arguta Lowell Ahart 2005-1-20 11473 Butte On the west side of McCabe Creek, above the high water line of Lake Oroville, about 1/4 mile south of the siphon, about 3 miles (air) northeast of Hurleton, about 7 miles (air) east of Oroville Dam. 304 Comment
  JEPS116137  Dryopteris arguta Lowell Ahart 2009-8-20 16288 Butte Below the rim, along a small drainage, west of the Guardian Rock Trail, about 30 yards northwest of Pine Trail, about 3/8 mile (air) southwest of the intersection of Ten Mile House Road and Highway 32, Upper Bidwell Park, about 10 miles northeast of Chico 398 Comment
  JEPS119500  Duchesnea indica var. indica Lowell Ahart, John Dittes, Josephine Guardino 2012-4-6 17819 Butte On the north side of Big Chico Creek, Lost Park in Bidwell Park, City of Chico. Comment
  CHSC115172  Dudleya cymosa subsp. cymosa Lowell Ahart 2015-5-9 20168 Sierra On the north side of the Canyon Creek Trail, trail on the north side of the North Fork of the Yuba River, about 300 yards west of Highway 49, about one mile west of Indian Valley. 692 Comment
  CHSC94669  Dysphania ambrosioides Lowell Ahart 2006-10-8 13411 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
  CHSC94749  Dysphania ambrosioides Lowell Ahart 2006-9-26 13355 Colusa Along the deep ditch, south side of 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
  HSC97888  Dysphania botrys L. Ahart, John Dittes 2003-9-17 10573 Tehama S side of Deer Creek, 400 yards E of Hwy. 99, 5 mi. SE of Los Molinos 61 Comment
  RSA0035342  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) southeast of Pilot Peak, abou 8 1/4 miles (air) northwest of La Porte. 1828 Comment
  SBBG120022  Dysphania botrys L. Ahart 2006-9-11 13282 Butte S edge of the N Fork of the Feather River, N side of Hwy 70, about 1/8 mi W of the Poe Dam, about 0.75 mi NE of Pulga, about 21 mi (air) NE of Oroville 431 Comment
  SEINET10537399  Dysphania multifida Lowell Ahart 1983-9-4 Ahart 4399 Sutter Dean Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 250 m. 250 Comment
  CHSC47673  Dysphania pumilio Lowell Ahart 1989-8-16 6379 Sierra At Ahart Sheep Camp, about 1 mile north-west of Milton Reservoir. 1706 Comment
  CAS-BOT-BC197101  Echinochloa crus-galli Lowell Ahart 1984-9-17 4791 b Butte Peter Ahart Ranch, about 2 1/4 miles north and 1/4 mile east of Honcut, about 12 miles south of Oroville 50 Comment
  JEPS114996  Echinochloa crus-galli Lowell Ahart 2007-11-3 14558 Butte Along a very small stream, 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
  CHSC113142  Echinochloa oryzoides Lowell Ahart 2013-9-20 19054 Butte In a rice field, about 100 yards west of the railroad, about 400 yards south of the Rice Experiment Station buildings, about 2 miles southeast of Richvale. 30 Comment
  RSA365246  Echinochloa oryzoides L. Ahart 1984-9-17 4792 A Butte Peter Ahart Ranch, ca. 2.3 mi. N and 0.3 mi E of Honcut, ca. 12 mi S of Oroville. 50 Comment
  CHSC31436  Eclipta prostrata L. Ahart 1980-9-28 2660 Butte Peter Ahart Ranch, ca. 2 mi n and 0.5 mi e of Honcut. 50 Comment
  CHSC116196  Elatine Lowell Ahart; John Dittes 2015-7-13 20297 Lassen About 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS120773  Elatine Lowell Ahart 2013-9-11 19023 -A-L Plumas Strand of Antelope Lake, where Boulder Creek enters the lake, about 15 air miles NE of Taylorsville. Comment
  CHSC82222  Elatine ambigua Lowell Ahart 2002-4-15 9496 Butte On the bottom and sides of ponds and ditches, east of Parking Lot 10, Gray Lodge State Wildlife Management Area, about 4 miles (air) southwest of Gridley. 22 Comment
  CDA34225  Elatine brachysperma L. Ahart, J. Dittes 2010-7-17 16845 Tehama Soap Creek Ranch, about 4.8 miles (air) southeast of Manton, about 2 miles (air) north of Highway 36. Comment
  JEPS117354  Elatine brachysperma Lowell Ahart, John Dittes 2010-7-17 16845 Tehama Soap Creek Ranch, about 4.8 miles (air) southeast of Manton, about 2 miles (air) north of Highway 36. 812 Comment
  JEPS124116  Elatine californica Lowell Ahart, John Dittes 2015-6-22 20264 Tehama About 1/4 mile north of Lassen Road, about 1.7 miles northeast 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
  UC1609415  Elatine chilensis Lowell Ahart 1993-5-17 6954 Butte 1 1/2 mi n and 3 mi e Honcut (w side of Dunstone Rd, about 12 mi se of Oroville) 60 Comment
  JEPS102605  Elatine rubella Lowell Ahart 2001-10-8 9311 Plumas On the sides of Boulder Creek, below the high water line of Antelope Lake, about 24 miles (air) NE of Quincy.. 1522 Comment
  CHSC96903  Eleocharis acicularis Lowell Ahart 2007-7-27 14394 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
  CAS-BOT-BC113704  Eleocharis acicularis Lowell Ahart 1980-10-6 2668 Plumas Lake, 1/2 mi W of Fowler Pk. 1700 Comment
  SEINET13710438  Eleocharis acicularis var. acicularis Lowell William Ahart, Lowell William Ahart 2000-1 8562 Sierra 1.5 Mi. SE of Pilot Peak, 7.5 Mi. NE of La Porte (T22N, R10E, sec 15, SW 1/4) 6000 Ft. 1829 Comment
  CHSC45168  Eleocharis bella Lowell Ahart 1984-5-7 4591 Butte Near Kunkle Creek and a new road, about 1/2 mile north of Kunkle Reservoir, about 2 mles south of Paradise. 548 Comment
  JEPS102693  Eleocharis bella Lowell Ahart 2001-7-27 9027 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
  CHSC94332  Eleocharis decumbens Lowell Ahart 2006-7-25 13060 Butte In the west part 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
  JEPS106370  Eleocharis decumbens Lowell Ahart 2004-8-2 11330 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
  CAS-BOT-BC113389  Eleocharis engelmannii Lowell Ahart 1981-9-6 3101 Plumas 1 1/2 mi SW of Crescent Mills. 1200 Comment
  CHSC75978  Eleocharis engelmannii Lowell Ahart; Vernon H. Oswald 1999-8-13 8144 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
  CHSC102112  Eleocharis macrostachya Lowell Ahart; John Dittes, Josephine Guardino 2009-7-29 16229 Plumas On dry bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam. 1591 Comment
  CHSC37041  Eleocharis macrostachya L. Ahart 1982-9-9 3781 Sutter Bottom of deep wash ca. 1/4 mi s of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  JEPS102695  Eleocharis macrostachya Lowell Ahart 2001-7-27 9028 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
  JEPS116113  Eleocharis macrostachya Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16335 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 Cre 1493 Comment
  SD131020  Eleocharis macrostachya Lowell Ahart 1981-7-3 2891 Sutter Sierra Nevada; Valley Grassland; Sutter Buttes; south side of South Butte; on damp rocky soil on bottom of small stream near the old gas well. 99 Comment
  SEINET13709305  Eleocharis macrostachya Lowell William Ahart, Lowell William Ahart 2001-1 9028 Nevada Strand of Prosser Creek Reservoir, S of Commemorative Emigrant Trail, about 1/4 Mi E of Hwy 89, about 4 Mi. N of Truckee (T18N, R16E, sec 26, NE 1/4) 5730 Ft 1747 Comment
  UCSB63783  Eleocharis macrostachya Ahart, Lowell 1998-7-18 Butte T20N, R4E, southeast 1/4 Section 8; along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville 408 Comment
  SEINET13710285  Eleocharis pachycarpa Lowell William Ahart, Lowell William Ahart 2000-1 8597 Butte Oroville Wildlife Area, 4 Mi. SW of Oroville (T18N, R3E, Dec 3, NE 1/4) 140 Ft. 43 Comment
  CHSC78201  Eleocharis quinqueflora Lowell Ahart 2000-5-25 8398 Yuba On the sides of a deep wash, a north branch of Dry Creek, about 100 yards west of Smartville Road, about 2 miles north of the intersection of Waldo Road and Smartville Road, about 6 miles (air) south of Smartville. 146 Comment
  JEPS98511  Eleocharis quinqueflora Lowell Ahart 2000-7-7 8555 Butte Small seep just west of the bridge across Fall River, on the north side of Fall River, about 3 miles north of Lumpkin Ridge Road, about 5 miles (air) northeast of Feather Falls. 1036 Comment
  JEPS98611  Eleocharis quinqueflora Lowell Ahart 2000-6-23 8506 Yuba Bog 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
  JEPS98723  Eleocharis quinqueflora Lowell Ahart 2000-6-23 8506 Yuba Bog 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
  UCR161035  Eleocharis quinqueflora Lowell Ahart 2000-7-13 8589 Sierra Upper W branch of Black Jack Ravine, on the W side of Hwy 98: Harris Meadow, c. 7 (air) mi NE of Alleghany 1616 Comment
  CHSC116025  Eleocharis radicans Lowell Ahart 2015-10-20 20567 Butte On the west side of the Feather River, about half way of and east of One Mile Pond, about 6 miles (air) east of Biggs. 26 Comment
  JEPS98265  Eleocharis radicans Lowell Ahart 2000-10-2 8698 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
  CDA38982  Eleocharis radicans L. Ahart 2000-9-2 8680 -A Butte About 4 miles (air) southwest of Oroville; about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area. Comment
  SEINET13709739  Eleocharis suksdorfiana Lowell William Ahart, Lowell William Ahart 2000-1 8588 Sierra 7 Mi. NE of Alleghany, Harris Meadow (T19N, R11E, sec 10, SW 1/4) 5300 Ft. 1615 Comment
  CHSC80982  Elodea canadensis Lowell Ahart 2001-8-10 9085 Sierra At 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
  CHSC97296  Elymus elymoides subsp. californicus Lowell Ahart; John Dittes 2007-8-9 14450 Plumas About 100 yards east of the poor dirt road, about 1/2 mile south of Mount Ingalls, about 5 1/2 miles (air) northwest of the north end of Lake Davis. 2493 Comment
  JEPS128694  Elymus elymoides subsp. californicus Lowell Ahart, John Dittes 2017-7-18 21554 Nevada 1014 feet southeast of intersection of Boca Road and Prosser Dam Road, meadow northwest of Prosser Creek Reservoir Dam, about 4.6 miles (air) northwest of Truckee. Comment
  CHSC47616  Elymus glaucus Lowell Ahart 1977-6-13 1410 Butte On the banks of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 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
  SD122519  Elymus multisetus Lowell Ahart 1984-5-21 4635 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; Foothill Woodland 675 Comment
  SEINET10560390  Elymus repens Lowell Ahart 1982-7-10 Ahart 3668 Butte On dry soil, forming a dense colony, 1/12 mi w of check-in station on n side of dirt rd, Graylodge Wildlife Refuge, 12 mi sw of Gridley. 35 Comment
  JEPS95633  Elymus sierrae Lowell Ahart 1994-7-20 7484 Plumas N of the Pacific Crest Trail, N side of Bunker Hill Ridge, about 1/2 mi NW of Mount Etna 1981 Comment
  CHSC44533  Elymus stebbinsii subsp. septentrionalis Lowell Ahart 1979-6-25 1946 Yuba North of the dirt road, about 2 miles east of Challenge. 640 Comment
  CHSC106200  Elymus triticoides Lowell Ahart; John Dittes 2010-8-31 17120 Modoc West side of Elkins Lane, about 20 yards south 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. 1267 Comment
  RSA768848  Elytrigia intermedia subsp. intermedia L. Ahart 2008-9-10 15370 Plumas North side of East Branch Creek, south side of Quincy La Porte Road, about 1.75 air miles south of Little Grass Valley Reservoir, about one mine northeast of La Porte. 1594 Comment
  CDA31945  Elytrigia pontica subsp. pontica L. Ahart, John Dittes 2008-8-25 15307 Modoc On the east bank (flood plain) of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout Comment
  JEPS117470  Elytrigia pontica subsp. pontica Lowell Ahart, John Dittes 2010-7-30 16956 Siskiyou About 30 yards west 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
  CHSC10547  Enemion occidentale Lowell Ahart 1970-3-18 Butte Swede's Flat Road, near Bangor. 121 Comment
  CHSC100371  Epilobium brachycarpum Lowell Ahart; John Dittes 2008-8-21 15262 Merced On the banks 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-southwest of Merced. 53 Comment
  RSA0105578  Epilobium brachycarpum Lowell Ahart, John Dittes 2013-7-22 18845 Lassen About 10 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA716271  Epilobium brachycarpum L. Ahart, John Dittes 2005-9-20 12460 Plumas S side of Forest Road 27N34, about 1 mile NE of Eisenheimer Peak, about 3/4 of a mile S of Wilcox Valley 1985 Comment
  RSA726356  Epilobium brachycarpum L. Ahart, John Dittes 2007-6-16 14144 Plumas West of a small stream, about 200 yards south of County Road 111(Beckwourth Gensee Road), 20 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1648 Comment
  SEINET10453001  Epilobium brachycarpum Lowell Ahart 1985-10-12 Ahart 5201 Butte At the end of Nelson Bar Road, about 1 mile south of Kunkle Reservoir, about 3 miles south of Paradise. Comment
  CHSC106344  Epilobium campestre Lowell Ahart; John Dittes 2010-8-30 17058 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
  CHSC33677  Epilobium campestre L. Ahart 1981-5-16 2805 Butte On the Graylodge Waterfowl Mgmt Area, 11 mi sw of Gridley. 35 Comment
  JEPS122048  Epilobium campestre Lowell Ahart, John Dittes 2014-5-18 19519 Tehama About 100 yards south of the bridge, about 1 1/2 miles east of the end of Lyon Cattle Road, about 3 1/2 miles (air) northeast of Los Molinos. Comment
  RSA724844  Epilobium canum subsp. latifolium L. Ahart 2006-9-28 13386 Butte East side of the North Fork of the Feather river, on the west side of Highway 70, about 10 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel. 445 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
  CHSC43403  Epilobium ciliatum subsp. ciliatum Lowell Ahart 1977-7-26 1495 Plumas Along the dirt road to Bunker Hill Creek, east of Bunker Hill Creek, about 1/2 mile north of the Bunker Hill Mine, about 10 miles north-east of La Porte. 1828 Comment
  CHSC78523  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2000-8-10 8637 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
  JEPS104654  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2003-7-18 10429 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
  JEPS120599  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2013-11-17 19265 A Butte McCabe Creek, below the high water line of Lake Oroville, about 5/8 mile southwest of the enterprise Bridge across Lake Oroville. Comment
  CHSC111606  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2012-7-28 18385 Nevada On the west side of Pioneer Trail, about 50 yards southeast of the P.G. and E. Pavilion and restrooms, on the east side of Bowman Lake Road, about 30 yards south of the Bear River, Bear Valley. 1433 Comment
  CHSC84617  Epilobium ciliatum subsp. glandulosum Lowell Ahart; John Dittes, Josephine Dittes 2003-8-23 10521 Tehama Along the sides of a small streamlet, meadow, about 80 yards southeast of Square Lake, about 3/4 mile northeast of Mount Linn, South Yolla Bolly. 2112 Comment
  CHSC96979  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2007-8-7 14421 Yuba On the southwest part of Hampshire Creek Meadow, about 80 yards west of the dirt road, about 1 mile (air) east of Clipper Mills. 1021 Comment
  JEPS113587  Epilobium ciliatum subsp. glandulosum Lowell Ahart, Josephine Guardino 2007-7-20 14345 Plumas Strand of Lake Davis, about 100 yards west of Long Point, northeast side of Lake Davis 1763 Comment
  JEPS113601  Epilobium densiflorum Lowell Ahart, Josephine Guardino 2007-7-21 14383 Plumas Sides of a small drying stream, about 60 yards south of the Beckwourth Taylorsville Road, south of the intersection with Forest Road 25N41Y, about 2 1/4 miles (air) northwest of the most northwest part of Lake Davis 1799 Comment
  JEPS117486  Epilobium densiflorum Lowell Ahart, John Dittes 2010-7-31 16994 Lassen Dry meadow on the bottom of a small wash, about 5 yards north 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
  RSA795667  Epilobium densiflorum L. Ahart 2012-8-12 18418 Butte South edge of North Honcut Creek, about 0.75 miles north and 2.5 miles east of Honcut, about 13 miles southeast of Oroville. 40 Comment
  CHSC70344  Epilobium foliosum L. Ahart 1982-6-4 3536 Butte 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 1000 Comment
  JEPS106078  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
  CHSC112253  Epilobium minutum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18649 Colusa Inner North Coast Range. 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. 566 Comment
  CHSC94772  Epilobium minutum Lowell Ahart 2006-6-15 12737 Glenn On the south side of Black Diamond Road, about 2 miles west of the paved road. about 4 miles (by road) from Stonyford. 582 Comment
  JEPS115807  Epilobium minutum Lowell Ahart, John Dittes, Josephine Guardino 2009-6-15 15895 Plumas About 200 yards northwest of Lake Almanor Dam, in mined over area 1421 Comment
  JEPS104618  Epilobium oregonense Lowell Ahart 2003-7-25 10451 Nevada Bog, ca 50 yd e of a log landing, on the e side of a poor road, ca 100 yd ne 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. 1769 Comment
  SEINET10453184  Epilobium paniculatum Lowell Ahart 1983-9-19 Ahart 4447 Sutter Near small stream on the south side of South Butte, Sutter Buttes, west of Marysville. Valley Grassland; 150 m. 150 Comment
  SEINET13710321  Epilobium pygmaeum Lowell William Ahart, Lowell William Ahart 2001-1 9229 Plumas Little Last Chance Creek, Frenchman Lake (T24N, R16E, sec 8, SE 1/4) 5580 Ft. 1701 Comment
  CHSC97675  Epilobium torreyi Lowell Ahart 2007-5-12 13800 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
  CHSC109673  Epipactis gigantea Lowell Ahart 2012-7-5 18277 Butte On the south edge of Big Chico Creek, at Table 11, east of the Deer Pen, Lower Bidwell Park, Chico. 74 Comment
  RSA724975  Epipactis gigantea Lowell A. Ahart 2006-6-15 12765 Glenn 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. 608 Comment
  CHSC84282  Equisetum X ferrissii Lowell Ahart; John Dittes 2003-6-11 10236 Tehama On the south edges 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
  CHSC43330  Equisetum arvense Lowell Ahart 1966-5-15 15 Sierra Near Pass Creek, in French Meadows, about 2 miles north-west of Webber Lake. 2133 Comment
  JEPS127255  Equisetum hyemale subsp. affine Lowell Ahart, John Dittes, Josephine Guardino 2016-2-11 20696 Tehama About 100 yards west of Bg Leaf Pool, about 1 1/2 miles by trail to Highway 32. Comment
  JEPS110229  Equisetum laevigatum Lowell Ahart 2006-7-16 12984 Butte In the west edge 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
  JEPS128729  Equisetum laevigatum Lowell Ahart, John Dittes, Josephine Guardino 2017-6-27 21434 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
  CAS-BOT-BC204453  Eragrostis cilianensis Lowell Ahart 1984-10-5 4813 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 3/4 miles east of Honcut, about 12 miles south of Oroville 50 Comment
  CHSC97129  Eragrostis cilianensis Lowell Ahart 2007-7-2 14243 Butte East road edge of Oroville Quincy Highway, about one mile south of Big Ridge Road, about 9 miles (air) northeast of Oroville. 362 Comment
  CHSC110982  Eragrostis curvula Lowell Ahart 2012-7-2 18126 Butte On the south side of Highway 70, about 1/2 mile southwest of Pentz Magalia Highway. 162 Comment
  CHSC117649  Eragrostis curvula Lowell Ahart; John Dittes 2016-8-25 21285 Tehama About 40 yards west of the Sacramento River, Anderson River Park, 0.7 mile (air) upstream from Stillwater Creek Conflunce, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderson. 117 Comment
  JEPS120091  Eragrostis curvula Lowell Ahart 2012-6-2 18126 Butte On the south side of Highway 70, about 1/2 mile southwest of Pentz Magalia Highway. Comment
  CHSC102293  Eragrostis hypnoides Lowell Ahart 2009-10-12 16464 Napa Below the high water line of Lake Berryessa along Capell Creek east 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. 437 Comment
  CHSC112804  Eragrostis hypnoides Lowell Ahart 2013-8-8 19003 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  CHSC75983  Eragrostis hypnoides Lowell Ahart; Vernon H. Oswald 1999-8-13 8151 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
  SEINET10954137  Eragrostis mexicana subsp. virescens Lowell Ahart 1999-10-28 Ahart 8306 Butte T20N, R1W, Section not surveyed. Large disturbed area along the east side of the Sacramento River, northwest of Parrott Landing, aout 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CAS-BOT-BC284084  Eragrostis pectinacea var. pectinacea Lowell Ahart 1979-9-8 s.n. Butte About 1/2 mile west of Oroville Dam 200 Comment
  JEPS117681  Eragrostis pectinacea var. pectinacea Lowell Ahart, John Dittes 2010-8-31 17092 Modoc On the west side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley 1276 Comment
  JEPS115368  Eremocarpus setiger Lowell Ahart 2009-7-3 15986 -A Butte On the north side of the road, 30 yards west of the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 30 yards east of Cedar Grove, Lower Bidwell Park, Chico 67 Comment
  UC1594625  Ericameria arborescens Lowell Ahart 1992-9-20 6924 Butte about 3/4 mi s Rocky Point (at end of the Enterprise Boat Launch Ramp) 259 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
  SBBG128754  Ericameria bloomeri L. Ahart 2008-8-14 15199 Plumas 20 yards NW of the metal gate, W side of Forest Rd 22N68, ca. 50 yards W of the S Fork of the Feather River, ca. 0.5 mi NE of Little Grass Valley Reservoir, ca. 5 mi (air) NE of La Porte 1571 Comment
  CHSC105279  Ericameria nauseosa var. oreophila Lowell Ahart; John Dittes 2010-7-30 16970 Siskiyou Shasta Big Springs Lake, 2.6 miles (air) northwest of Big Springs Lake, 3.9 miles (air) southeast of Grenada, 6.3 miles (air) northwest of Dwinnel Dam. 778 Comment
  JEPS114597  Ericameria nauseosa var. speciosa Lowell Ahart 2008-9-10 15360 Plumas On both sides of the Quincy La Porte Road, northwest of East Branch Creek, about 1 3/4 miles (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte 1593 Comment
  CHSC34305  Erigeron divergens L. Ahart 1981-9-6 3065 Plumas Near Lights Creek, ca. 6 mi n of Taylorsville. 1300 Comment
  JEPS87160  Erigeron divergens Lowell Ahart 1992-5-9 6757 Butte about 2.5 mi w Oroville Dam (on the n side of pool); Lake Oroville Recreation Area, Thermalito Diversion Pool 76 Comment
  CHSC96918  Erigeron eatonii var. sonnei Lowell Ahart; John Dittes, Josephine Guardino 2007-6-8 13982 Plumas Open rocky flat, along the edge of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1965 Comment
  CAS-BOT-BC295161  Erigeron inornatus Lowell Ahart 1981-7-7 2913 Butte East of the bridge across Rocky Honcut Creek, Swedes Flat Road, ca. 7 mi. N of Bangor 350 Comment
  CHSC63448  Erigeron petrophilus var. sierrensis Lowell Ahart 1994-7-28 7527 Plumas North-east of Frenchman Hill, south-west of Bucks Lake. 1706 Comment
  CHSC109619  Erigeron philadelphicus var. philadelphicus Lowell Ahart 2012-5-25 18114 Butte Northwest of the interesection of W. Frances Willard Avenue and Arcadian Avenue, one block south of Chico High School, Chico. 59 Comment
  CHSC105241  Erigeron pumilus subsp. intermedius Lowell Ahart; John Dittes 2010-7-31 16986 Lassen About 3,330 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. 1520 Comment
  JEPS102801  Erigeron pumilus var. intermedius Lowell Ahart 2001-8-29 9234 Plumas On the west side of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 Comment
  CHSC110034  Eriobotrya Lowell Ahart; Josephine Guardino, 2012-10-12 18481 Butte On the south side of the CARD Community Center building, Lower Bidwell Park, Chico. 62 Comment
  CHSC116299  Eriochloa acuminata var. acuminata Lowell Ahart 2015-11-4 20611 Sutter Peach orchard, about 50 yards east of George Washikngton Blvd., about 1/8 mile south of intersection of Highwy 20 and George Washington Blvd., Yuba City. 18 Comment
  JEPS105857  Eriodictyon californicum Lowell Ahart 2004-5-2 10841 Sutter On a mountainside, on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter 480 Comment
  JEPS87137  Eriodictyon californicum Lowell Ahart 1992-5-9 6764 Butte On the north side of the dirt road, on the north side of the Thermalito Diversion Pool, Lake Oroville Recreation Area, about 2 (air) miles north of Oroville 76 Comment
  UC1562368  Eriodictyon californicum Lowell Ahart 1990-4-28 6468 Butte in the borrow area about 4/10 mi w of Pacific Heights Road about 4 1/2 mi sw Oroville (1/4 mi s of the Feather River); s of the Feather River, sw of Oroville 30 Comment
  CHSC82784  Eriogonum dasyanthemum Lowell Ahart 2002-8-26 9924 Glenn Near Grizzly Flats, on the strand and on the west side of Black Butte Reservoir, about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte reservoir. 142 Comment
  JEPS102432  Eriogonum dasyanthemum Lowell Ahart 2001-6-8 8783 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  CHSC45846  Eriogonum lobbii Lowell Ahart 1976-8-10 1187 Sierra Near the dirt road, near the Deadwood Mine, near the Deadwood Creek, near Deadwood Peak, about 1 1/2 miles southwest of Poker Flat, about 7 air miles east of La Porte. 1828 Comment
  CAS-BOT-BC259397  Eriogonum luteolum Lowell Ahart 1988-8-10 6171 Butte Along Poe Power House Road, about 1 mile north-west of the Poe Power House, about 1 mile south-east of Jarbo Gap 487 Comment
  CHSC80858  Eriogonum nudum var. deductum Lowell Ahart; Vernon H. Oswald 2001-7-11 8893 Plumas Along the northeast trail from the dirt road to Homer Lake, about 5 1/2 miles (air) north of Greenville, about 5 1/2 miles (air) east of Lake Almanor. 2042 Comment
  CHSC69142  Eriogonum nudum var. oblongifolium Lowell Ahart 1997-8-7 7834 Yuba On the north side of the dirt road, northwest of the bridge across Indian Creek, about 3 miles (air) east of Challenge. 762 Comment
  CHSC63712  Eriogonum nudum var. pubiflorum Lowell Ahart 1994-10-23 7567 Butte Along the disturbed edge of the water ditch, about 2 3/4 miles north of De Sabla Reservoir, about 4 miles (air) west and 1/2 mile north of Stirling City. 853 Comment
  CAS-BOT-BC267525  Eriogonum umbellatum Lowell Ahart 1982-7-28 3698 Sierra About 1/4 mile north of the Pacific Mine, about 5 miles east of La Porte 1700 Comment
  CAS-BOT-BC267906  Eriogonum umbellatum Lowell Ahart 1985-8-15 5164 Butte 50 yards south of the road to the Forbestown Res. about 2 1/2 miles north-east of Forbestown 883 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
  JEPS114751  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
  SEINET13711033  Eriogonum umbellatum var. nevadense Lowell William Ahart, Lowell William Ahart 2001-1 8895 Plumas Outcrop SW of Homer Lake, 5.5 Mi. N of Greenville (T27N, R9E, sec 10, NW 1/4) 6700 Ft. 2042 Comment
  JEPS117588  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
  CAS-BOT-BC265202  Eriogonum umbellatum var. speciosum Lowell Ahart 1980-8-12 2526 Yuba Ca. 2 mile south-east of Woodleaf, Sierra Nevada 800 Comment
  CHSC31773  Eriogonum vimineum L. Ahart 1972-6-21 122 Butte On bottom of small wash. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC84440  Eriogonum vimineum Lowell Ahart 2003-8-17 10516 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  CHSC89391  Eriogonum wrightii var. subscaposum Lowell Ahart 2004-9-29 11406 Nevada About 20 yards northwest of Forest Road 41, about 1 mile northwest of Weaver Lake, about 2 miles (air) northwest of Bowman Lake, about 4 miles (air) northeast of Graniteville. 1882 Comment
  JEPS107394  Eriophyllum lanatum var. grandiflorum Lowell Ahart, John Dittes 2005-6-10 12090 Siskiyou Rocky hillside, north of the rock fence, about 150 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
  CHSC67752  Eriophyllum lanatum var. integrifolium Lowell Ahart 1977-6-20 X 1434 Plumas Mountain side, one-half mile northeast of the Feather Fork Mine, about 6 miles north of La Porte. 1645 Comment
  CHSC111367  Erodium brachycarpum Lowell Ahart 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
  JEPS114604  Erodium brachycarpum Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14628 Merced Above the high margins of vernal pools and on the 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
  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
  RSA715954  Erodium cicutarium L. Ahart, John Dittes 2005-6-10 12058 Siskiyou On a poor dirt road, about 80 yards north 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. 777 Comment
  RSA794834  Erodium cicutarium L. Ahart, Josephine Guardino, John Dittes 2009-6-14 15883 Plumas Below the high water line, about 300 yards SW of the Boat Ramp, about 300 yards N of Lake Almanor Dam. 1375 Comment
  CHSC60968  Erysimum capitatum var. capitatum Lowell Ahart 1993-7-6 7058 Butte Jackass Flat, Mooreville Ridge, about 1 (air) mile north-west of the Lost Creek Reservoir Dam. 1158 Comment
  JEPS120998  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  CHSC51017  Erythranthe cardinalis Lowell Ahart 1990-8-15 6581 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. 228 Comment
  CHSC31868  Erythranthe geniculata L. Ahart 1974-5-14 453 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC84390  Erythranthe guttata Lowell Ahart; John Dittes, Josephine Dittes 2003-8-23 10534 Tehama Along and in 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
  CHSC97103  Erythranthe guttata Lowell Ahart; Josephine Guardino 2007-7-21 14388 Plumas Bottom and sides of a small stream, about 30 yards south of the Beckwourth Taylorsville Road, south of the intersection with Forest Road 25N41Y, about 2 1/4 miles (air) northwest of the most northwest part of Lake Davis. 1799 Comment
  RSA0035400  Erythranthe guttata Lowell Ahart 2008-7-18 15134 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
  CHSC87324  Erythranthe latidens Lowell Ahart 2004-4-29 10785 Tehama Near a vernal pool, along the Nomalaki Trail, about 1/2 mile northwest of Bowers Creek, about 1 1/4 miles northwest of Forest Road 23N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta. 571 Comment
  CHSC113902  Erythranthe lewisii Lowell Ahart 2014-8-24 19754 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
  CHSC110048  Erythranthe microphylla Lowell Ahart 2013-5-1 18688 Colusa Inner North Coast Range. In 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
  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
  CHSC94774  Erythranthe microphylla Lowell Ahart 2006-6-15 12742 Glenn Burned area, along a small drainage, on the north side of Black Diamond Road, about 2 1/2 miles west of the paved road, about 4 3/4 miles (by road) from Stonyford. 749 Comment
  CAS-BOT-BC504533  Erythronium multiscapideum Lowell Ahart 1972-3-22 s.n. Butte Along Swedes Flat Road, Bangor 1500 Comment
  CHSC32068  Erythronium purpurascens L. Ahart 1977-4-20 1318 Sierra 5 mi ne of Alleghany. 1500 Comment
  JEPS117217  Eschscholzia caespitosa Lowell Ahart 2010-5-16 16696 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
  JEPS127334  Eucephalus breweri Lowell Ahart 2016-7-9 21086 Plumas Top and on the east side of Table Mountain, about 2 miles (air) northwest of Tamarack Flat, about 4 miles (air) northwest of Little Grass Valley Reservoir Dam. Comment
  SEINET10906849  Euphorbia maculata Lowell Ahart 1984-8-19 Ahart 4786 Butte West of Pacific Heights Road, about 5 miles south-west of Oroville. Comment
  SEINET10873987  Euphorbia serpillifolia Lowell Ahart 1984-8-19 Ahart 4785 Butte West of Pacific Heights Road, about 5 miles south-west of Oroville. Comment
  CHSC92123  Eurybia integrifolia Lowell Ahart; John Dittes 2005-9-20 12424 Plumas Southwest side of Mud Lake, about 1/2 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2029 Comment
  JEPS95021  Eurybia radulina Lowell Ahart 1997-9-6 7892 Butte about 5 air mi n of Concow Reservoir (on w side of a logging road, about 1 1/2 mi n of Oakway, about 3 air mi nw of Flea mountain, about 3 air mi ne of Sawmill Peak) 762 Comment
  CHSC42756  Euthamia occidentalis Lowell Ahart 1987-8-3 5844 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS102603  Euthamia occidentalis Lowell Ahart 2001-10-16 9368 Plumas On the south side of a small stream, and on the NW side of Round Valley Reservoir, about 2 1/2 miles SW of Greenville. 1365 Comment
  RSA755369  Euthamia occidentalis L. Ahart 2009-10-8 16413 Butte On the south edge of a deep large ditch on the north side of the road, about 20 yards northeast of Parking Lot 12, Gray Lodge Waterfowl Management Area, about 7 air miles southwest of Gridley. 20 Comment
  CHSC42497  Fallopia convolvulus Lowell Ahart 1987-6-9 5722 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
  CHSC103996  Festuca arundinacea Lowell Ahart 2010-5-14 16640 Butte Along a trail in the Disc Golf Area, about 130 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. 398 Comment
  JEPS113254  Festuca californica Lowell Ahart 2007-5-29 13939 Butte On the south side of the Dome Trail, trail leads to the Middle Fork of the Feather River, about 100 yards northeast of 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) northea 844 Comment
  RSA795530  Festuca elmeri L. Ahart 2004-5-29 10969 Sutter On a rocky steep (cliffs) slope, about 30 yards north of the fence, where the fence ends, on the northwest side of the South Butte, Suttler Buttes, about 5 air miles northwest of Sutter. 538 Comment
  JEPS127231  Festuca microstachys var. pauciflora Lowell Ahart, Josephine Guardino 2016-4-19 20792 Contra Costa 2.3 miles (air) southwest of Los Vaqueros Reservoir Dam, approximately 25 miles (air) southwest to Stockton. Undesignated section of Canada de Los Vaqueros Land Grant, Byron Hot Springs USGS 7.5' Quad. Comment
  CHSC102710  Festuca occidentalis Lowell Ahart; John Dittes, Josephine Guardino 2009-7-22 16154 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
  CHSC87982  Festuca occidentalis Lowell Ahart; John Dittes, Josephine Guardino 2004-6-6 11004 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
  CHSC88159  Festuca occidentalis Lowell Ahart 2004-7-23 11298 Butte On the sides of a small stream, about 20 yards northwest of the dirt road to the West Branch Campground, about 50 yards southeast of the intersection of Humbug Road and Philbrook Reservoir Road, about 1 3/4 miles (air) west of Philbrook Reservoir Dam, about 3 miles (air) southeast of Butte Meadows. 1586 Comment
  CHSC97170  Festuca occidentalis Lowell Ahart 2007-5-29 13942 Modoc On the south side of Dome Trail, trail leads to the Middle Fork of the Feather River, about 200 yards northeast of 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. 844 Comment
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Oct 5 2019
  JEPS104053  Festuca subulata Lowell Ahart 2003-8-13 10506 Plumas On the e side of Hopkins Creek, ca 1/8 mi south of where Hopkins Creek forks, sw of Turkey Town, ca 1 mi (air) sw of Blue Nose Mountain, ca 10 1/2 mi (air) ne of La Porte. 1524 Comment
  SEINET10822121  Festuca subulata Lowell Ahart 2008-6-2 Ahart 14807 Butte T19N, R6E, southwest 1/4 Section 4. On the south side of Ponderosa Way, about 1 mile (air) southwest of the Ponderosa Dam, about 2 1/4 miles (air) northwest of Forbestown. 671 Comment
  JEPS87592  Festuca viridula Lowell Ahart 1994-7-7 7469 Plumas nw side of Pacific Crest Trail about 1/4 air mi sw Pilot Peak 2011 Comment
  JEPS115276  Ficus carica Lowell Ahart 2009-6-30 15976 Butte On dry 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
  CHSC117722  Fimbristylis autumnalis Lowell Ahart; John Dittes 2016-8-25 21282 Tehama Along the west edge 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
  CHSC25473  Floerkea proserpinacoides L. Ahart 1977-6-20 151 Plumas Meadow, 6 mi n of La Porte. 1800 Comment
  CHSC47431  Floerkea proserpinacoides Lowell Ahart 1981-6-23 2871 Sierra Near the edge of a very small stream on the north side of the road, near the base of Mount Etna, about 11 miles northeast of La Porte. 1828 Comment
  CAS-BOT-BC55682  Frangula purshiana Lowell Ahart 1975-7-2 s.n. Plumas 8 miles north of Sly Creek Dam. About 2 miles west of American House which is 3 miles south of La Porte Comment
  CHSC46512  Frangula purshiana Lowell Ahart 1975-7-2 843 Plumas Growing on moist to dry soil along the edge of a small stream, about 8 miles north of the Sly Creek Dam. 1219 Comment
  JEPS119818  Frangula rubra subsp. rubra Lowell Ahart 2012-7-28 18395 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
  CHSC109647  Fraxinus latifolia Lowell Ahart 2012-5-17 18086 Butte On the north side of Big Chico Creek, on the south side of the paved park road, south of the old walnut orchard, south of Vallombrosa Avenue, aobut 1/10 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  JEPS108969  Fraxinus latifolia Lowell Ahart 2006-9-11 13288 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
  JEPS115585  Fraxinus latifolia Lowell Ahart 2009-5-23 15749 Butte On the east edge of Big Chico Creek, about 50 yards west of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highwat 32, about 10 miles northeast of Chico 203 Comment
  CHSC105503  Fremontodendron californicum subsp. californicum Lowell Ahart; John Dittes 2010-7-17 16869 Tehama On dry 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
  CHSC29995  Fritillaria micrantha L. Ahart 1980-3-26 Butte Ca. 1/2 mi e and 1/4 mi s of Hurleton. 600 Comment
  CHSC47588  Fritillaria micrantha Lowell Ahart 1976-4-15 1074 Yuba On the east side of Ponderosa Way, at the Brownsville Dump, about 2 miles south-west of Brownsville. 457 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
  CHSC113924  Galium aparine Lowell Ahart 2014-5-8 19444 Tehama On the south side of the paved road to Berris Creek, about 0.4 miles east of the intersection with Black Butte Road, about 12 1/2 miles (air) southwest of Corning. 150 Comment
  CHSC117191  Galium aparine Lowell Ahart; John Dittes 2016-6-7 21020 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  HSC96965  Galium aparine L. Ahart 2006-6-21 12826 Sierra N side of the road, 2 mi. W of the forest 1330 Comment
  JEPS121130  Galium aparine Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18615 Mendocino 1.1 air miles SSE of Anchor Bay, 2.0 air miles NW of mouth of Gualala River. Comment
  CHSC113490  Galium bifolium Lowell Ahart 2014-7-10 19616 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1664 Comment
  CHSC104805  Galium murale Lowell Ahart 2010-6-1 16764 Butte On dry poor bare soil, on the south side of Guardians Trail, about 1/8 mile west of the power lines, Upper Bidwell Park, about 1 1/2 miles (air) east of Chico. 115 Comment
  CHSC37235  Galium parisiense L. Ahart 1982-5-30 3465 Sutter Where the road crosses, ca. 1/8 mi W of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  HSC97010  Galium parisiense L. Ahart, John Dittes, Josephine Guardino 2004-4-15 10745 Tehama Along the Nomalaki Trail, second switchback N of Bowers Creek, about 3/4 mi. NW of FS Rd. 23N69 (Mud Flat Rd.), 6 1/2 air mi. SW of Paskenta 523 Comment
  CHSC116709  Gamochaeta ustulata Lowell Ahart 2016-5-15 20835 Butte On the very west edge of North Honcut Creek, Peter Ahart Ranch, about 1 1/4 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. 45 Comment
  CAS-BOT-BC192054  Garrya fremontii Lowell Ahart 1981-7-3 2902 Sutter On north side of the South Butte, Sutter Buttes 600 Comment
  RSA754937  Garrya fremontii L. Ahart 2008-6-4 14808 Sierra North side of Forest Road 98, about 2 air miles northeast of Harris Meadow, about 9.5 air miles northeast of Alleghany. 1907 Comment
  CAS-BOT-BC282600  Gastridium phleoides Lowell Ahart 1985-6-17 s.n. Butte Near teh dirt road on Fields Ridge, about 4 miles south-east of Feather Falls 792 Comment
  CHSC91095  Gastridium phleoides Lowell Ahart; Jack Lindsay 2005-5-31 11839 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
  CHSC93870  Gastridium phleoides Lowell Ahart 2006-6-9 12652 Butte On the east side of 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. 403 Comment
  CHSC94472  Gastridium phleoides Lowell Ahart 2006-8-9 13171 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC97243  Gastridium phleoides Lowell Ahart 2007-6-3 13978 Butte On the east side of Jordan Hill Road, about 1 1/2 miles northwest of Concow Creek, about 1 1/2 miles west of Concow Reservoir. 358 Comment
  HSC93378  Gastridium phleoides L. Ahart 1995-5-30 7584 Butte S of Beatson Hollow, 1/8 mi. N of Cherokee Road, N Table Mtn., 7 mi. N of Oroville. 335 Comment
  JEPS103281  Gastridium ventricosum Lowell Ahart 2002-5-7 9639 Butte High banks of a pond, at the beginning of a SE branch of Schirmer Ravine, about 50 yards east of the pond on the east side of Cherokee Road, North Table Mountain, about 4 miles (air) north of Oroville. 228 Comment
  JEPS107701  Gayophytum heterozygum Lowell Ahart, John Dittes 2005-9-20 12448 Plumas On the south side of Forest Road 27N34, about 1 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley 2049 Comment
  SBBG127506  Gayophytum heterozygum L. Ahart 2010-9-21 17215 Butte E of the poor dirt rd, ca. 80 yards W of Big Kimshew Crk, ca. 1.5 mi (air) NE of Jones Meadow, ca. 2 1/2 mi (air) SE of Philbrook Reservoir 1917 Comment
  CHSC94246  Gayophytum racemosum Lowell Ahart 2006-7-16 13005 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
  UCD103291  Geranium carolinianum L. Ahart 1982-4-24 3372 Sutter 1/4 mile sw of Myers home, Myer's Ranch, Sutter Buttes. 50 Comment
  CHSC99007  Geranium molle Lowell Ahart 2008-5-21 14764 Butte Dry bare granite soil, below the high water line of Lake Oroville, on the south 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
  SBBG128083  Geranium purpureum L. Ahart 2008-5-12 14762 Butte E side of Ponderosa Way, ca. 1 mi SW of the Ponderosa Dam, ca. 2.25 mi NW of Forbestown 670 Comment
  CAS-BOT-BC459402  Geum macrophyllum Lowell Ahart 1980-6-20 2416 Butte Along the South Fork of Feather River, Sierra Nevada 800 Comment
  SEINET10496746  Gilia capitata subsp. pedemontana Lowell Ahart 1984-6-8 Ahart 4671 Butte At the Ponderosa Dam, ca. 2 mi NW of Forbestown; Yellow Pine Forest; 370 m. 370 Comment
  JEPS107828  Gilia inconspicua Lowell Ahart, John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, 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 1427 Comment
  CDA3383  Glinus lotoides L. Ahart, Vernon Oswald 2001-8-22 9169 Glenn On the strand and on the west side of Black Butte Reservoir, about 3 miles north of the bridge across Stony Creek and the upper reaches of Black Butte Reservoir. Comment
  CHSC113543  Glinus lotoides Lowell Ahart 2014-9-23 19869 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
  JEPS124255  Glinus lotoides Lowell Ahart 2015-10-26 20592 Butte About 1 mile (air) southeast of Kunckle Reservoir, about 5 miles (air) southeast of Paradise. 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
  JEPS110249  Glyceria declinata Lowell Ahart 2006-5-3 12564 Butte Banks of a small stream, near basalt cliffs on the south side of the stream, about 100 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
  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
  RSA716686  Gnaphalium canescens subsp. thermale L. Ahart, John Dittes 2005-9-19 12405 Plumas About 1 1/4 miles east of Kettle Rock, about 1 1/4 miles southeast of Taylor Lake. 1990 Comment
  RSA713012  Gnaphalium luteoalbum L. Ahart 2005-12-11 12511 Butte Rice Experiment Station between the Main Ditch ad Stine Lateral, on the N side of Hamilton Road, 1/4 mile E of Riceton Hwy 2.25 miles air E of Biggs. 30 Comment
  CAS-BOT-BC302476  Gnaphalium palustre Lowell Ahart 1986-11-9 5450 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
  CHSC81347  Gnaphalium palustre Lowell Ahart 2001-9-18 9273 Plumas On the wet strand of the south end on the pond, Butterfly Valley, about 5 miles (air) northwest of Quincy. 1104 Comment
  JEPS124348  Gnaphalium palustre Lowell Ahart 2015-10-26 20601 -A Butte About 1 mile (air) of southeast of Kunckle Reservoir, about 5 miles (air) southeast of Paradise. Comment
  JEPS128622  Gnaphalium palustre Lowell Ahart, John Dittes 2017-7-18 21552 Nevada 1014 feet southeast of intersection of Boca Road and Prosser Dam Road, meadow northwest of Prosser Creek Reservoir Dam, about 4.6 miles (air) northeast of Truckee. Comment
  UCD132403  Gnaphalium palustre L. Ahart 1982-5-30 3455 Sutter along edge of cow trail, Sutter Buttes. Myers Ranch, ca. 1/8 mi W of Myers home. 50 Comment
  CHSC106192  Gratiola ebracteata Lowell Ahart; John Dittes 2010-8-31 17128 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
  CHSC112719  Gratiola ebracteata Lowell Ahart 2013-10-26 19220 Butte South side of Philbrook Creek, below the high water line (strand) of Philbrook Reservoir. 1681 Comment
  RSA724829  Grindelia camporum L. Ahart 2006-9-26 13345 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 5.5 miles east of Maxwell. 24 Comment
  CHSC97732  Grindelia hirsutula var. davyi 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
  JEPS105929  Hackelia nervosa Lowell Ahart, John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11158 Plumas 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
  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
  CAS-BOT-BC307520  Hazardia whitneyi var. whitneyi Lowell Ahart 1980-9-17 2658 Plumas 1/2 mile north-west of Fowler Pk., Sierra Nevada 1600 Comment
  UC1609017  Helianthella californica subsp. nevadensis Lowell Ahart 1993-9-8 7171 Butte on top of ridge about 1 mi e Snow Mountain 2103 Comment
  RSA718312  Helianthella californica var. nevadensis L. Ahart 2006-6-9 12644 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
  CHSC83054  Heliotropium curassavicum Lowell Ahart 2002-10-17 9986 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
  JEPS107479  Heliotropium curassavicum Lowell Ahart, John Dittes 2005-6-9 12038 Siskiyou Rocky hill, about 20 yards north 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
  JEPS120804  Heliotropium curassavicum Lowell Ahart 2013-10-1 19096 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CHSC37054  Heliotropium europaeum L. Ahart 1982-10-11 3880 Sutter Bank of wash, below the bridge on Pass Rd, a little e of Gas Compression Station, Sutter Buttes. 50 Comment
  HSC100735  Heliotropium europaeum Lowell Ahart 2009-10-12 16433 Napa Below the high water line of Lake Berryessa, along Capell Creek E of rest area, 3/4 mi. NE of Hwy. 128 on Berryessa Knoxville Rd., 3/4 mi. SW of Capell Cove Launch Ramp, 19 (air) mi. W of Winters. 133 Comment
  JEPS121162  Heliotropium europaeum Lowell Ahart 2013-8-2 18991 Tehama Bottom of Burris Creek, strand of Black Butte Reservoir, about 1.5 miles SW of the Dam, about 12 air miles NW of Orland. Comment
  CHSC41864  Helminthotheca echioides Lowell Ahart 1986-10-29 5413 Butte Along the edge of Wickman Road, about 1 1/4 miles north of Highway 162, about 2 1/2 miles north-west of Biggs. 28 Comment
  CHSC106324  Hemizonia lobbii Lowell Ahart; John Dittes 2010-8-31 17094 Modoc On the east side of Elkins Lane, about 50 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. 1267 Comment
  CHSC112612  Herniaria hirsuta var. hirsuta Lowell Ahart 2013-9-11 19032 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
  RSA726567  Hesperevax caulescens L. Ahart 2007-5-12 13775 Yuba About 13 miles (air) northeast of Marysville. 28 Comment
  CHSC101680  Hesperocnide tenella Lowell Ahart; Josephine Guardino 2009-5-8 15652 Butte Protected area under cliffs, above a steep slope, about 40 feet south of the south side of the gravel road and Big Chico Creek, about 100 yards east of the end of Chico Canyon Road, Upper Bidwell Park, Chico. 68 Comment
  CHSC45497  Hesperocnide tenella Lowell Ahart 1974-4-14 399 Butte Peter Ahart Ranch, about 1 mile north and 1 1/4 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  CHSC78152  Hesperolinon californicum Lowell Ahart 2000-5-31 8426 Butte Steep grassy and shrubby slope, just west of Lake Oroville, about 400 yards east of where Kunkle Creek enters Lake Oroville, east of the Kunkle Power House, about 3 miles southeast of Paradise. 286 Comment
  CHSC84022  Hesperolinon californicum Lowell Ahart 2003-6-18 10289 Butte About 150 yards west of the dredge piles along North Honcut Creek, about 2 1/2 miles north and 2 1/2 miles east of Honcut, about 12 miles southeast of Oroville. 60 Comment
  CHSC84246  Hesperolinon disjunctum Lowell Ahart 2003-7-14 10408 Lake Along a stream, on the west side of the second causeway going southwest on Bartlett Springs Road, Indian Valley Reservoir. 449 Comment
  JEPS110118  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 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
  CHSC39668  Hesperolinon micranthum Lowell Ahart 1983-6-21 4094 Butte Found along Bloomer Hill Road, about 1 1/4 miles west of the Oroville Quincy Highway, about 15 miles north-east of Oroville. 450 Comment
  CHSC78154  Hesperolinon micranthum Lowell Ahart 2000-5-31 8427 Butte Steep grassy and shrubby slope, just west of Lake Oroville, about 400 yards east of where Kunkle Creek enters Lake Oroville, east of the Kunkle Power House, about 3 miles southeast of Paradise. 286 Comment
  SEINET10493823  Hesperolinon micranthum Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4094 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
  CHSC19721  Heteranthera limosa Lowell Ahart 1974-8-29 1618 Butte Found in a rice field. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC113394  Heterocodon rariflorum Lowell Ahart 2014-7-2 19547 Butte Depression on south side of the poor road, east of cow corral, about 200 yards north of the County Road, about one mile west of the intersection of County Road and Lumpkin Road, about 7 miles northeast of Feather Falls. 1281 Comment
  CHSC97499  Heterocodon rariflorum Lowell Ahart 2007-5-14 13875 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
  RSA715836  Heterocodon rariflorum L. Ahart 2005-7-23 12195 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
  SEINET5733943 Image available Heteromeles arbutifolia Lowell Ahart 1985-1 5092 Butte Ca. 2.5 mi. NE of Forbestown. 200 yds. S of the dirt road to the Forbestown Res. Yellow Pine Forest.; Forbestown 899 Comment
  CHSC42462  Heterotheca grandiflora Lowell Ahart 1987-5-6 5502 Butte Along the dirt road, near the Poe Power House on the east side of the North Fork of the Feather River, about 2 miles south-east of Jarbo Gap. 280 Comment
  CHSC44872  Heterotheca grandiflora Lowell Ahart 1977-8-31 1557 Yuba Near Jack Slough, on the Sam Shintaffer Farm, about 2 air miles north-east of Marysville. 27 Comment
  JEPS121890  Heterotheca grandiflora Lowell Ahart 2014-11-17 19912 Butte Just below the high water line of Lake Oroville, about 150 yards southwest of the Enterprise Boat Launch Area, parking area, about 11 miles (air) northeast of Oroville. Comment
  CHSC34307  Heterotheca oregona var. compacta L. Ahart 1981-9-6 3067 Plumas Near Lights Creek, ca. 6 mi n of Taylorsville. 1300 Comment
  JEPS127116  Heterotheca oregona var. compacta Lowell Ahart, John Dittes 2016-8-24 21267 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
  SEINET10839257  Heterotheca villosa Lowell Ahart, Peter Ahart 1983-8-22 Ahart 4343 Nevada Along South Fork of the Yuba River, 2.5 mi east of the bridge across the river, east of Lake Vera Rd, ca. 5 mi north of Nevada City. Foothill Wood- land; 400 m. 400 Comment
  RSA795001  Heuchera micrantha var. erubescens L. Ahart, John Dittes 2009-7-15 16101 Plumas East of the power line on the south side of Forest Service Road 26N22, about 2.3 air miles southeast of Butt Valley Reservoir Dam. 1518 Comment
  CHSC81797  Hibiscus lasiocarpos var. occidentalis Lowell Ahart 2001-11-9 9412 Glenn On the south side of the bridge on Biggs Princeton Road, about 2 1/2 miles east of Afton. (About 50 yards northwest of the bridge and along the north side of a ditch is a large colony). 21 Comment
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Mar 25 2017
  CHSC101946  Hieracium albiflorum Lowell Ahart; John Dittes 2009-7-13 16053 Plumas On dry soil, on the east 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
  CHSC69414  Hieracium scouleri var. scouleri Lowell Ahart 1997-8-28 7873 Plumas On the retaining wall, on the south side of the dirt road, just west of Hopkins Creek, about 1 mile east of the Bunker Hill Mine. 1706 Comment
  UC1562435 Image available Hoita macrostachya Lowell Ahart 1990-7-1 6534 Butte about 2 mi ne Forbestown (along the road to the Forbestown Reservoir) 822 Comment
  JEPS104181  Holcus lanatus Lowell Ahart 2003-6-11 10273 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
  JEPS113805  Holcus lanatus Lowell Ahart 2007-6-22 14220 Yuba Near a new road pad, about 350 yards west of the power tower, about 50 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 28 Comment
  CHSC44874  Holocarpha virgata Lowell Ahart 1979-9-25 2021 Butte About 1/2 mile east of Oregon City, about 7 miles north of Oroville. 365 Comment
  RSA0112643  Holocarpha virgata subsp. virgata Lowell Ahart 2013-9-5 19022 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
  CAS-BOT-BC149861  Holodiscus discolor Lowell Ahart 1985-6-16 5044 Butte About 1/4 mile south-west of the Forbestown Res., about 4 miles north-east of Forbestown 487 Comment
  RSA700314  Holodiscus microphyllus L. Ahart 2004-8-9 11366 Nevada On the east side of the upper reaches of Jackson Creek, on the NE side of English Mountain, about 3/4 mile (air) south of Catfish Lake, about 2 3/4 miles east of the east end of Bowman Lake. 2163 Comment
  JEPS95849  Holodiscus microphyllus var. microphyllus Lowell Ahart and Vernon H. Oswald 1999-7-26 8121 Nevada ridge about 75 yds W of Grouse Ridge Rd(Rd 14); about 1/2 mi SW of the Lookout; about 5 1/2 mi NE of Bowman Lake Rd(Rd 18); about 4 1/2 mi(air) S of Bowman Lake 2133 Comment
  JEPS116087  Hordeum brachyantherum subsp. brachyantherum Lowell Ahart 2009-5-30 15778 Butte On dry soil, broad open drainage in oak woodland, about 60 yards north of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 1/2 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  CHSC98819  Hordeum depressum Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14616 Merced Bottom and sides of 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
  JEPS107663  Hordeum depressum Lowell Ahart, John Dittes 2005-6-9 12001 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
  CHSC102051  Hordeum jubatum Lowell Ahart; John Dittes, Josephine Guardino 2009-7-29 16244 Plumas On dry bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam. 1591 Comment
  CAS-BOT-BC285086  Hordeum marinum subsp. gussoneanum Lowell Ahart 1977-6-2 s.n. Butte Peter Ahart Ranch, Honcut 50 Comment
  JEPS107284  Hordeum marinum subsp. gussoneanum Lowell Ahart, John Dittes 2005-6-9 12000 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
  SD149200  Hordeum marinum subsp. gussoneanum Lowell Ahart 1980-4-29 2121 Butte Honcut, Peter Ahart Ranch 49 Comment
  SEINET11910948  Horkelia californica subsp. dissita L. Ahart, Ahart, P. 1984-1 4647 Butte About 1mi. NE of the West Branch Bridge, ca 2mi. S of Old Yankee Hill, ca 16mi. NE of Oroville 450 Comment
  CHSC54564  Horkelia fusca subsp. parviflora Lowell Ahart 1991-7-22 6693 Sierra In French Meadow, about 1/4 mile south of Henness Pass Road, about 3 miles north-west of Webber Lake. 2133 Comment
  CHSC43365  Horkelia tridentata Lowell Ahart 1976-5-22 1122 Nevada Along the edge of Graniteville Road, about 5 miles west of Graniteville. 1371 Comment
  CHSC69151  Horkelia tridentata subsp. tridentata Lowell Ahart 1997-8-7 7833 Yuba On the north side of the dirt road, northwest of the bridge across Indian Creek, about 3 miles (air) east of Challenge. 762 Comment
  JEPS98700  Hydrocotyle umbellata Lowell Ahart 2000-9-2 8680 Butte On the margins of and in a small pond, about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 4 miles (air) southwest of Oroville. 42 Comment
  CHSC102846  Hypericum anagalloides Lowell Ahart 2009-6-19 15922 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
  CHSC72251  Hypericum anagalloides Lowell Ahart 1998-9-11 8054 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
  SBBG128726  Hypericum anagalloides L. Ahart 2011-7-9 17575 Butte seeps, SE edge of large open bare granite area, ca. 3.8 mi NE of Little Bald Rock, ca. 2 mi (air) SE of Brush Crk, ca. 15 mi (air) NE of Oroville 974 Comment
  SEINET13710866  Hypericum formosum Lowell William Ahart, Lowell William Ahart 2003-1 10351 Yuba 5 Mi. N of Dobbins (39 Deg 26'11.7"N, 121 Deg 12' 07.3"W) 2746 Ft. 837 Comment
  JEPS105917  Hypericum perforatum Lowell Ahart 2004-7-17 11274 Nevada Near small stream, upper reaches of Steephollow Creek, ca. 20 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
  JEPS113151  Hypochaeris glabra Lowell Ahart 2007-5-8 13726 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
  CHSC92046  Hypochaeris radicata Lowell Ahart 2005-8-19 12333 Butte On the east side of North Honcut Creek, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. 49 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
  JEPS87610  Isoetes bolanderi Lowell Ahart 1994-7-1 7426 Sierra ca 11 air miles ne Alleghany (ca 1 1/2 mi ne of Middlewaters, e of Keystone Mt, n side of Henness Pass Rd, at Keystone Gap, small pond w of larger pond) 1889 Comment
  UC1259503  Isoetes bolanderi Lowell Ahart 1978-10-22 Sierra 12 mi. n.e. La Porte (ca. 1/8 mi. e. of main rd. that crosses Bunker Hill Ridge between Pilot Peak & Mt. Etna) 2000 Comment
  CHSC117402  Isoetes howellii Lowell Ahart 2016-5-30 20881 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 1/8 miles east of Honcut, about 12 miles (air) southeast of Oroville. 31 Comment
  CAS-BOT-BC61874  Isoetes nuttallii Lowell Ahart 1980-5-17 2271 Butte 1/2 mi. south-east of Hurleton 600 Comment
  CAS-BOT-BC61875  Isoetes nuttallii Lowell Ahart 1980-4-19 2087 Butte Valley Grassland, Peter Ahart Ranch, Honcut 50 Comment
  CHSC46181  Isoetes nuttallii Lowell Ahart 1981-3-24 2707 Yuba About 6 miles east of Wheatland. 45 Comment
  JEPS95311  Isoetes nuttallii Lowell Ahart 1994-6-27 7372 Yuba 4 mi NE of Strawberry Valley (center of Schwartz Meadow, E side of La Porte Road) 1219 Comment
  CAS-BOT-BC61877  Isoetes nuttallii Lowell Ahart 1975-6-20 s.n. Butte Valley Grassland, Peter Ahart Ranch, Honcut 38 Comment
  CHSC109653  Jasminum mesnyi Lowell Ahart; Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-19 18021 Butte On the north side of Big Chico Creek, on the north side of the paved park raod, southeast part of the old walnut orchard, south of Vallombrosa Avenue, about 1/8 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  JEPS113472  Jensia rammii Lowell Ahart 2007-5-12 13772 Yuba Dry bare red soil, 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
  CAS-BOT-BC340242  Jensia rammii Lowell Ahart 1979-4-19 s.n. Butte Peter Ahart Ranch. Honcut 50 Comment
  UC1950053  Juglans californica var. hindsii Lowell Ahart 2009-7-3 15988 Butte 10 yards south of the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 80 yards east of Cedar Grove parking area, Lower Bidwell park, Chico 67 Comment
  SBBG127962  Juglans hindsii L. Ahart 2009-8-3 16252 Butte N side of Ten Mile House Rd, Upper Bidwell Park, 3/8 mi SW of jct of Ten Mile House Rd and Hwy 32 379 Comment
  CHSC84040  Juncus Lowell Ahart; John Dittes 2003-5-22 10211 Shasta On the north side of the poor dirt road, about 250 yards northeast of the barn, about 1/8 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. 259 Comment
  CHSC96986  Juncus acuminatus Lowell Ahart 2007-8-7 14412 Yuba Hampshire Creek Meadow, about 5 yards west of the dirt road, about 1 mile (air) east of Clipper Mills. On the east side of a small pond, on the west side of the dirt road. 1021 Comment
  JEPS114885  Juncus acuminatus Lowell Ahart 2008-5-30 14802 Butte Dry to damp bare granite soil, along a small drainage, below the high water line of Lake Oroville, about 300 yards east of the Enterprise Boat Launch Area, about 10 1/2 miles (air) northeast of Oroville 223 Comment
  JEPS124264  Juncus acuminatus Lowell Ahart 2015-11-19 20675 Yuba West side of Lake Francis, about 1 1/2 miles south of Dobbins. Comment
  UC1594712  Juncus acuminatus Lowell Ahart 1992-7-23 6827 Butte about 2 mi w of Oroville Dam (near Longs Bar Monument, on n side of Thermalito Diversion Pool, Lake Oroville Recreation Area); Lake Oroville Recreation Area, Thermalito Diversion Pool 76 Comment
  CHSC116624  Juncus balticus subsp. ater Lowell Ahart; Josephine Guardino 2016-4-19 20785 Contra Costa Undesignated section of Canada de Los Vaqueros Land Grant. Along a small drainage, west of the poor dirt road, 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
  CHSC112219  Juncus bufonius Lowell Ahart 2013-5-1 18691 Colusa Inner North Coast Range. In 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
  SEINET10472241  Juncus bufonius Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4096 Butte T21N R5E sec 30. Along Bloomer Hill Rd, ca. 3 mi nw of Oroville-Quincy Hwy, ca. 16 mi ne of Oroville. Yellow Pine Forest; 700 m. 700 Comment
  UCD141359  Juncus bufonius L. Ahart 1981-9-6 3106 Plumas Indian Creek, about 1/2 mile southwest of the intersection of Highway 89 and Arlington Road, about 1.5 miles southwest of Crescent Mills. 1097 Comment
  CHSC80984  Juncus bufonius var. bufonius Lowell Ahart 2001-7-27 9030 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
  CHSC81638  Juncus bufonius var. bufonius Lowell Ahart 2001-10-8 9305 Plumas On the sides of Boulder Creek, below the high water line of Antelope Lake, about 24 mies (air) northeast of Quincy. 1522 Comment
  CHSC94859  Juncus bufonius var. bufonius Lowell Ahart 2006-6-11 12713 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
  CHSC98806  Juncus bufonius var. bufonius Lowell Ahart 2008-5-2 14707 Butte Below the high water line of Lake Oroville, about 100 yards southwest of the Enterprise Boat Launch Area, about 10-1/2 miles (air) northeast of Oroville. 238 Comment
  JEPS103384  Juncus bufonius var. bufonius Lowell Ahart 2002-7-22 9910 Placer 50 yards NE of the small natural lake, on the E side of the paved road to Lake Valley Reservoir, ca 1/4 mile E of Yuba Gap and Highway 80. 1780 Comment
  JEPS107944  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
  JEPS110163  Juncus bufonius var. bufonius Lowell Ahart 2006-10-8 13424 Butte 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
  JEPS115390  Juncus bufonius var. bufonius Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16338 Tehama West side of pond 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 Lass 1493 Comment
  JEPS98716  Juncus bufonius var. bufonius Lowell Ahart 2000-6-29 8533 Butte 1/2 mi W of Flea Mountain; ; W side Concow Rd at Flea Meadow, 3 1/2 air mi N of Concow Reservoir, 5 air mi E of Magalia 1036 Comment
  UC1609069  Juncus bufonius var. bufonius Lowell Ahart 1993-6-20 6992 Butte about 1 air mi nw of the Lost Creek Reservoir Dam (Jackass Flat, Mooreville Ridge); Jackass Flat, Mooreville Ridge 1158 Comment
  CHSC47536  Juncus bufonius var. congestus Lowell Ahart 1983-5-4 3960 Sutter Along the edge of Pass Road, about 4 miles W of Kellogg Road, Sutter Buttes. 45 Comment
  JEPS127264  Juncus bufonius var. congestus Lowell Ahart, Josephine Guardino 2016-4-19 20786 Contra Costa 1.4 miles (air) northwest of Los Vaqueros Reservoir Marina, 1.9 miles (air) southwest of Los Vaqueros Reservoir Dam, approximately 25 miles (air) southwest to Stockton. Undesignated section of Canada de Los Vaqueros Land Grant, Byron Hot Springs USGS 7.5' Quad. Comment
  CHSC117204  Juncus bufonius var. occidentalis Lowell Ahart; John Dittes 2016-6-7 20988 Lassen West edge of pond, 120 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
  CHSC93707  Juncus capillaris Lowell Ahart; John Dittes 2005-6-2 11959 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
  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
  JEPS127084  Juncus capitatus Lowell Ahart 2016-4-15 20749 Butte About 1/2 mile southwest of Dutch Ravine, about 8 miles (air) southeast of Oroville. Comment
  RSA716168  Juncus chlorocephalus L. Ahart 2005-7-31 12244 Nevada Between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2063 Comment
  JEPS102506  Juncus confusus Lowell Ahart 2001-7-17 8901 Plumas In the middle 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
  CHSC100329  Juncus cyperoides Lowell Ahart 2008-7-9 15049 Yuba In a small meadow, about 50 yards northwest of the dirt road (road now destroyed), north part of the Hampshire Creek Meadow, about 1 mile (air) east of Clipper Mills. 1015 Comment
  RSA0036992  Juncus cyperoides Lowell A. Ahart 2013-7-1 18820 Butte On the east side of Black Bart Road, about 3/4 mile (by road) southwest from the intersection of Forbestown Road and Black Bart Road, about 3 1/2 miles (air) southwest of Forbestown. 731 Comment
  CHSC96868  Juncus effusus subsp. effusus Lowell Ahart 2007-6-30 14227 Yuba Bottom of a small wash, about 250 yards west of the power tower, about 100 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 29 Comment
  SD147655  Juncus effusus subsp. effusus Lowell Ahart 1980-10-6 2665 Plumas Sierra Nevada, lake, I(c) mile west of Fowler Park, Red Fir forest. 1700 Comment
  CHSC32873  Juncus effusus subsp. pacificus L. Ahart 1980-10-6 2665 Plumas On the s shore of the lake ca. 0.5 mi w of Fowler Peak, ca. 2 mi n of Little Grass Valley Reserv. 1700 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
  HSC102791  Juncus effusus subsp. pacificus L. Ahart 2008-8-13 15159 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
  JEPS114883  Juncus effusus subsp. pacificus Lowell Ahart 2008-8-13 15159 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
  JEPS118084  Juncus effusus var. pacificus Lowell Ahart 2011-8-23 17646 Butte In the large meadow, Pinkard Creek flows through the meadow, east of the corral, about 1 mile north of Lost Creek Reservoir Dam, about 4 miles (air) northeast of Clipper Mills. Meadow in Yellow Pine Forest 1133 Comment
  CHSC82605  Juncus ensifolius Lowell Ahart 2002-7-22 9919 Placer 50 yards northeast of the small natural lake, on the east side of the paved road to Lake Valley Reservoir, about 1/4 mile east of Yuba Gap and Highway 80. 1780 Comment
  JEPS94353  Juncus ensifolius Lowell Ahart 1997-8-30 7878 Yuba about 1 air mi s of Woodleaf (on w side of the dirt road, near a road culvert) 944 Comment
  JEPS95840  Juncus ensifolius Lowell Ahart and Vernon H. Oswald 1999-7-26 8127 Nevada on the W side of Jackson Meadow Graniteville Road (Road 18). about one mi S of the spillway of Jackson Meadow Reservoir 1859 Comment
  RSA0118745  Juncus ensifolius Lowell Ahart 2014-8-24 19734 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
  UCD141516  Juncus ensifolius Lowell Ahart 2008-8-13 15160 A Plumas west edge of La Porte Road, west of East Branch Creek, about 1.75 mile (air) south of Little Grass Valley Reservoir, about one mile northeast of La Porte. 1613 Comment
  JEPS120842  Juncus exiguus Lowell Ahart 2013-7-9 18830 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
  CHSC113944  Juncus howellii Lowell Ahart 2014-8-13 19705 Butte East edge of a large wet meadow, about 110 yards southeast of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. 1638 Comment
  CHSC59021  Juncus howellii Lowell Ahart 1992-7-26 6840 Butte Near a small stream, 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
  JEPS110165  Juncus howellii Lowell Ahart 2006-8-15 13178 Butte North edge of a wet area west of a large open 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
  RSA0035816  Juncus howellii Lowell A. Ahart 2008-8-14 15216 Plumas South of the road to Tamarack Flat, about 3/4 mile west of Lumpkin Ridge Road, about 5 miles (air) northwest of La Porte. 1725 Comment
  RSA719179  Juncus howellii L. Ahart 2006-7-19 13016 Tehama East of Colby Creek, near large man made piles of soil and rock, about 1.75 miles (air) SE of Colby Mountain, about 4.75 miles (air) NE of Butte Meadows. 1504 Comment
  CAS-BOT-BC312663  Juncus leiospermus Lowell Ahart 1978-5-1 1692 Butte Peter Ahart Ranch, Honcut 50 Comment
  SEINET10472448  Juncus leiospermus Lowell Ahart 1984-5-7 Ahart 4589 Butte T22N R4E sec 31. Ca. 0.5 mi N of Kunkle Reservoir, along Kunkle Creek, ca. 2 mi S of Paradise, E side of Pentz-Magalia Hwy. Foothill Woodland; 600 m. 600 Comment
  CAS-BOT-BC110104  Juncus leiospermus var. ahartii Lowell Ahart 1982-5-14 3434 Butte Peter Ahart Ranch, about 2 miles north and 0.5 mile east of Honcut. 50 Comment
  CHSC106860  Juncus leiospermus var. ahartii Lowell Ahart 2011-5-2 17351 Butte Open pasture field, 226 feet north of west tower leg, between the middle and west wire, Peter Ahart Ranch, about 1 mile north and 1 5/8 miles east of Honcut, about 12 miles south of Oroville. 54 Comment
  JEPS110154  Juncus leiospermus var. leiospermus Lowell Ahart 2006-5-8 12588 Butte Margins of a vernal pool where there is basalt shelfing, about 100 yards south of the Gray Pine on the rim of Coal Canyon, about 1 3/4 miles northwest of the parking area, cow chute, and Cherokee Road, North Table Mountain, about 7 miles (air) north of Or 354 Comment
  JEPS107924  Juncus macrandrus Lowell Ahart 2005-7-23 12165 Nevada On the bottom of a small wash, meadow, under the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  CAS-BOT-BC110772  Juncus mertensianus Lowell Ahart 1984-7-19 4755 Butte About 0.5 mile east of Bald Mountain, about 5 miles northeast of Stirling City. 1750 Comment
  CHSC47523  Juncus mexicanus Lowell Ahart 1977-5-19 1382 Sutter Near a small wash, on the south side of the South Butte, Sutter Buttes. 182 Comment
  JEPS115920  Juncus nevadensis Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16208 Plumas On dry rocky soil, drainage from a 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
  JEPS95626  Juncus nevadensis Lowell Ahart 1994-7-28 7533 Plumas SW of Bucks Lake (NE of Frenchman Hill) 1706 Comment
  RSA718740  Juncus nevadensis L. Ahart 2006-7-25 13078 Tehama In a small meadow on the west side of the road, about 50 yards southeast 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
  JEPS119978  Juncus nevadensis var. nevadensis Lowell Ahart 2012-9-18 18453 Sierra Bottom of Poverty Hill Hydraulic Mine, about 2 miles (air) southwest of Poverty Hill, about 4 1/2 miles (air) south of La Porte. Comment
  SD192838  Juncus nevadensis var. nevadensis Lowell Ahart 2008-9-10 15373 Plumas South edge of Onion Valley, ca. 0.75 mile northwest of Pilot Peak, ca. 0.5 mile east of the Ouincy La Porte Road, ca. 9.5 miles northeast of La Porte. 1915 Comment
  CHSC84399  Juncus occidentalis Lowell Ahart 2003-7-6 10365 Yuba Near a meadow, east of the power line, about 30 yards west of Fountain Hill Road, about 5 miles (air) north of Dobbins. 836 Comment
  JEPS103514  Juncus occidentalis Lowell Ahart 2002-7-22 9911 Placer 50 yards NE of the small natural lake, on the E side of the paved road to Lake Valley Reservoir, ca 1/4 mile E of Yuba Gap and Highway 80. 1780 Comment
  JEPS118348  Juncus occidentalis Lowell Ahart 2011-9-17 17667 Plumas On the south side of an unnamed stream that flows east into Little Grass Valley Reservoir and opposite the Black Rock, about 20 yards southwest of the paved road, about 1/8 mile west of Little Grass Valley Reservoir 1595 Comment
  RSA716797  Juncus occidentalis L. Ahart, John Dittes 2005-9-20 12450 Plumas On the south side of forest road 27N34, about 1 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2005 Comment
  JEPS117318  Juncus parryi Lowell Ahart 2010-9-28 17258 Butte About 10 yards west of Big Kimshew Creek, meadow, 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
  CHSC100489  Juncus patens Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15418 Butte In the center of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  CDA32031  Juncus tenuis L. Ahart, J. Dittes 2009-9-7 16390 A Plumas Below the high water line of Lake Almanor, about 2000 feet northwest of Lake Almanor Dam. Comment
  JEPS114812  Juncus tenuis Lowell Ahart 2008-8-13 15163 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
  UCD169861  Juncus tenuis Lowell Ahart; John Dittes 2009-9-7 16390 A Plumas About 2000 feet northwest of Lake Almanor Dam. 1591 Comment
  SEINET10472350  Juncus tenuis Lowell Ahart, Peter Ahart 1983-7-29 Ahart 4219 Butte T21N R6E sec 10? Ca. 2 mi s of Milsap Bar, ca. 23 mi ne of Oroville. Yellow Pine Forest; 750 m. 750 Comment
  CHSC44526  Juncus trilocularis Lowell Ahart 1988-6-29 6096 Butte Along a small wash south of Bean Creek Road, about 1/2 mile southeast of Little Bald Rock. 975 Comment
  CHSC99820  Juncus trilocularis Lowell Ahart 2008-6-13 14821 Butte East side of a small meadow, bottom of an old gold mined area, about 150 yards west of the cemetery, about 150 yards north of Oregon Gulch, about 10 miles (air) northeast of Oroville. 311 Comment
  CHSC47573  Juncus uncialis Lowell Ahart 1978-4-10 1626 Butte On the bottom of vernal pools and swales, Peter Ahart Ranch, about 2 1/4 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 39 Comment
  CHSC97490  Juncus uncialis Lowell Ahart 2007-5-14 13852 Yuba Bottom of a large vernal pool, about 30 yards east of the third power tower, about 1/2 mile north of Fruitland Road, about 13 1/2 miles (air) northeast of Marysville. 29 Comment
  UC1543891  Juncus uncialis Lowell Ahart 1982-5-9 3428 Butte Peter Ahart Ranch Honcut 50 Comment
  SEINET10472465  Juncus uncialis Lowell Ahart 1984-3-24 Ahart 4526 Sutter West Butte Road, 1.4 mile N of the Sacramento Outing Club, Sutter Buttes, west of Marysville. Valley Grassland; 35 m. 35 Comment
  CHSC116023  Juncus usitatus Lowell Ahart 2015-10-16 20560 Butte On the west side of the Feather River, about half way of and east of One Mile Pond, about 6 miles (air) east of Biggs. 26 Comment
  CHSC96942  Juncus usitatus Lowell Ahart 2007-7-7 14255 Sutter North side of Pennington Road, about 1/10 mile east of Powell Road, about 5 1/2 miles west of Live Oak. 21 Comment
  JEPS113746  Juncus usitatus Lowell Ahart 2007-6-30 14234 Yuba Near and west of new road pad, about 350 yards west of the power tower, about 100 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville 28 Comment
  JEPS120683  Juncus usitatus Lowell Ahart 2013-10-19 19168 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
  GH404906  Juncus usitatus L. Ahart 2007-7-7 14258 Unknown south of the wire fence, on the south side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  SBBG121533  Juncus usitatus L. Ahart 2007-7-5 14249 Butte ca. 25 yards W of French Ave, on N side of Evans Reimer Rd, ca. 2 air mi SW of Gridley 24 Comment
  CHSC37066  Juncus xiphioides L. Ahart 1982-9-29 3838 Butte Along banks and edges of small stream, along Pinkard Creek, ca. 1.5 mi n of Lost Creek Reservoir Dam, ca. 3.5 mi nw of Strawberry Valley. 1200 Comment
  CAS-BOT-BC235616  Keckiella breviflora var. breviflora Lowell Ahart 1980-6-19 2386 Butte Along Swedes Flat Road, near Bangor 97 Comment
  CHSC61016  Keckiella breviflora var. glabrisepala Lowell Ahart 1993-6-26 7041 Butte Jackass Flat, Mooreville Ridge, about 1 (air) mile north-west of the Lost Creek Reservoir Dam. 1158 Comment
  UC1594577  Keckiella breviflora var. glabrisepala Lowell Ahart 1992-5-9 6765 Butte about 2 air mi n Oroville (on n side of Thermalito Diversion Pool, on n side of dirt road); Lake Oroville Recreation Area 76 Comment
  CHSC10739  Kelloggia galioides Lowell Ahart 1972-7-7 138 Placer French Meadows. 1524 Comment
  CHSC69432  Kickxia elatine Lowell Ahart 1997-8-13 7851 Nevada Along the north side of Penn Valley Road, just west of the intersection of Pleasant Valley Road and Penn Valley Road, just south of Highway 20, about 1.5 miles west of Penn Valley. 426 Comment
  JEPS110095  Kickxia elatine Lowell Ahart 2006-8-9 13134 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA702853  Kickxia elatine L. Ahart 2004-10-14 11467 Lake On the south side of the bridge across Cache Creek, on the south side of Bartlett Springs Road (Road M 12), about 3 miles west of the northwest part of Indian Valley Reservoir. 503 Comment
  HSC93185  Koeleria gerardi L. Ahart 1995-5-30 7589 Butte N Table Mtn., about 7 mi. N of Oroville, about 2 mi. NW of Cherokee Rd., 1/10 mi. SE of the reservoir. 305 Comment
  CHSC31709  Koeleria phleoides Lowell Ahart 1974-4-14 412 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC340349  Kyhosia bolanderi Lowell Ahart 1979-8-16 s.n. Plumas Along Ohio Ravine 1700 Comment
  CHSC75309  Kyllinga brevifolia Lowell Ahart 1999-5-24 8082 Butte Along the steps on the south side of the building, Butte County Historical Society museum, 2335 Baldwin Avenue, Oroville. 60 Comment
  JEPS107967  Kyllinga brevifolia Lowell Ahart 2005-8-14 12332 Butte Edge of ponds, Oroville Wildlife Area, about 1/2 mile west of Pacific Heights Road, about 3 1/2 miles (air) northwest of Palermo 28 Comment
  JEPS115280  Lactuca saligna Lowell Ahart 2008-11-4 15400 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 263 Comment
  JEPS122294  Lactuca saligna Lowell Ahart 2014-8-24 19731 Butte On the south side of the road, about 50 yards west of the Woodleaf Creek, about 1/2 mile southwest of Forbestown Reservoir Dam, about 4 miles (air) northeast of Forbestown. Comment
  CHSC103003  Lactuca serriola Lowell Ahart 2009-10-12 16426 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
  CHSC113861  Lactuca serriola Lowell Ahart 2014-9-9 19861 Plumas On the north side of the gravel road, on the west side of Sly Creek Reservoir, about 9 miles (air) southwest of La Porte. 1126 Comment
  CHSC99927  Lactuca serriola Lowell Ahart 2008-7-18 15110 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
  JEPS117165  Lagophylla ramosissima Lowell Ahart, John Dittes 2010-8-30 17065 Modoc About 15 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
  JEPS127275  Lagophylla ramosissima Lowell Ahart, John Dittes 2016-7-13 21109 Lassen 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. Comment
  CHSC113441  Lapsana communis Lowell Ahart 2014-7-7 19564 Butte About 5 yards east of the Skyway, about one-mile north of Stirling City. 1142 Comment
  RSA715477  Lasthenia californica L. Ahart 2005-5-11 11791 Butte 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. 359 Comment
  CAS-BOT-BC337952  Lasthenia californica Lowell Ahart 1982-4-23 3347 Sutter Along the road to Myers home, about 1/4 mile north of Myers home, Myers Ranch, Sutter Buttes 50 Comment
  CHSC10647  Lasthenia fremontii Lowell Ahart 1970-5-12 Butte Peter Ahart Ranch, Honcut. 45 Comment
  UCSC008611  Lasthenia fremontii Lowell Ahart 2007-5-12 13771 Yuba 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
  RSA715612  Lasthenia glabrata subsp. glabrata L. Ahart, John Dittes 2005-6-1 11843 Plumas On both sides of Hwy 70, E of the Plumas County Airport, about 3 miles E of Beckwourth. 1413 Comment
  JEPS98423  Lathyrus angulatus Lowell Ahart 2000-5-13 8351 Butte 5 air miles SW of Oroville (near margin of Thermalito Afterbay, S side of access road to boat ramp, w of Larkin Road, 1 1/4 mi S of Oroville Airport) 42 Comment
  CAS-BOT-BC204949  Lathyrus delnorticus Lowell Ahart 1986-5-24 5305 Sutter Near the W fence line, Dean Ranch, ca. 1 mi. W of the Dean Cabin, ca. 4.5 mi. NW of Sutter, Sutter Buttes 274 Comment
  CHSC45893  Layia fremontii Lowell Ahart 1974-4-11 365 Butte Vernal pool or swale, Peter Ahart Ranch, about 1 1/2 miles north and 2 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  JEPS107861  Layia fremontii Lowell Ahart 2005-5-11 11801 Butte Margins 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
  CDA42926  Leersia oryzoides L. Ahart 2012-9-28 18459 Butte Just east of the east end of Sycamore Pool in Big Chico Creek, Lower Bidwell Park, Chico. Comment
  CHSC110402  Leersia oryzoides Lowell Ahart 2012-9-28 18459 Butte Just east of the east end of Sycamore Pool in Big Chico Creek, Lower Bidwell Park, Chico. 62 Comment
  JEPS120161  Leersia oryzoides Lowell Ahart 2012-9-28 18459 Butte Just east of the east end of Sycamore Pool in Big Chico Creek, Lower Bidwell Park, Chico. Comment
  CHSC103126  Lemna minuta Lowell Ahart; John Dittes, Josephine Guardino 2009-7-21 16118 Plumas About 20 yards east of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 miles (air) southwest of Lake Almanor. 1302 Comment
  JEPS104055  Leontodon saxatilis subsp. longirostris Lowell Ahart 2003-5-22 10190 Shasta North side of a wash, w of the poor dirt road, ca 150 yd south of the Coleman Canal, ca 1 1/8 mi w of the barn, 4 mi (air) wsw of Darah Springs State Fish Hatchery, ca 11 mi (air) ene of Cottonwood. 259 Comment
  CHSC103735  Leontodon taraxacoides 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
  CHSC112998  Lepidium campestre Lowell Ahart; John Dittes 2013-7-23 18886 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
  RSA795692  Lepidium campestre L. Ahart 2012-7-28 18401 Nevada Meadow on the east side of Pioneer Trail, about 30 yards east of the PGE Pavilion and restrooms, on the east side of Bowman Lake Road, about 30 yards south of the Bear River, Bear Valley. 1434 Comment
  CHSC50653  Lepidium didymum Lowell Ahart 1990-5-28 6501 Butte Along the edges of Palm Avenue, about 1/12 mile east of Larkin Road, about 2 1/2 miles north-east of East Gridley. 30 Comment
  CDA1334  Lepidium latifolium L. Ahart 2004-10-4 11426 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC89452  Lepidium latifolium Lowell Ahart 2004-10-4 11426 Lake Below the high water line of Indian Valley Reservoir, near the stream in the northeast part of the reservoir, on the south side of Bartlett Springs Road. 446 Comment
  CHSC99158  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
  CDA5625  Lepidium perfoliatum L. Ahart, J. Dittes 2005-6-9 11998 Siskiyou 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. Comment
  RSA715768  Lepidium perfoliatum L. Ahart, John Dittes 2005-6-9 11998 Siskiyou 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 2.5 miles (air) ESE of Grenada. 775 Comment
  CAS-BOT-BC12845  Lepidium pinnatifidum Lowell Ahart 1982-7-10 3664 Butte Gray Lodge check in station, about 12 miles southwest of Gridley. Parking area. 35 Comment
  CHSC45097  Lepidium pinnatifidum L. Ahart 1982-7-10 3664 Butte Around parking area at checking station, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 Comment
  CDA32437  Leptochloa fascicularis L. Ahart 2000-5-18 8372 Butte On the bottom of the Clay Pit, about 1/8 mile west of the Oroville Airport and Larkin Road, about 4 1/2 miles (air) southwest of Oroville. Comment
  JEPS95945  Leptochloa fascicularis Lowell Ahart 1999-8-13 8153 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-BC273947  Leptochloa fusca subsp. fascicularis Lowell Ahart 1986-11-9 5456 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
  CHSC42551  Leptosiphon bolanderi Lowell Ahart 1987-5-11 5613 Butte South of the Forbestown Ditch, about 2 1/2 miles north-east of Forestown. 868 Comment
  CHSC46648  Leptosiphon ciliatus Lowell Ahart 1989-7-7 6370 Plumas West of Bunker Hill Creek, about 1/2 mile north of the Bunker Hill Mine, about 12 miles north-east of La Porte. 1828 Comment
  CHSC31788  Leptosiphon filipes L. Ahart 1974-4-14 408 Butte Peter Ahart Ranch, Honcut. 45 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
  CHSC31611  Lessingia nana L. Ahart 1975-7-19 895 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC39349  Lessingia nemaclada Lowell Ahart 1983-6-30 4179 Butte Along the dirt road, about 1 1/2 miles north-east of Concow Res. 550 Comment
  CHSC69448  Lessingia nemaclada Lowell Ahart 1997-9-6 7887 Butte Near the McNab Cypress grove, near the steel tower power line, along the sides of a logging road, about 1/4 mile west of Rim Road, about 2 miles (air) northeast of Concow Reservoir. 731 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
  JEPS104646  Lessingia virgata Lowell Ahart 2003-8-3 10464 Butte On the w side of North Honcut Creek, ca 2 1/2 mi n and 2 1/2 mi e of Honcut, ca 12 mi (air) se of Oroville. 60 Comment
  CHSC82355  Leucothoe davisiae Lowell Ahart 2002-7-6 9842 Plumas On the south side of the dirt road and south of the large meadow, on Rock Island Ridge, about 3/4 mile southeast of Soapstone Hill and the Oroville Quincy Highway, about 1 1/2 miles (air) northeast of Four Trees. 1611 Comment
  CHSC10792  Lewisia rediviva Lowell Ahart 1968-3-17 Butte Table Mountain, Oroville. 243 Comment
  CAS-BOT-BC444565  Lewisia triphylla Lowell Ahart 1986-7-8 5348 Plumas About 1 mile north-west of Pilot Peak, about 14 miles north-east of La Porte 1981 Comment
  CHSC106062  Ligustrum obtusifolium Lowell Ahart; Susan Mason, Josephine Guardino 2010-8-6 17045 Butte Near the north edge of Big Chico Creek, south of Picnic Area 40, Lower Bidwell Park, Chico. 70 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
  CHSC99925  Lilium parvum Lowell Ahart 2008-7-18 15118 Nevada Near a small stream, about 50 yards north of the water ditch, along the P. G. and E. water ditch near 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
  CHSC97448  Limnanthes alba subsp. alba Lowell Ahart 2007-5-14 13866 Yuba Damp bare red soil, 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
  CHSC96611  Limnanthes douglasii subsp. rosea Lowell Ahart; John Dittes, Josephine Guardino 2007-4-3 13607 Tehama East of the poor dirt road, on the north side of a large vernal pool, 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
  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
  RSA0119059  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 one mile southeast of the Rice Experiment Station. 30 Comment
  CHSC105942  Limosella acaulis Lowell Ahart; John Dittes 2010-7-17 16844 Tehama On the bare strand of the pond, Soap Creek Ranch, about 4.8 miles (air) southeast of Manton, about 2 miles (air) north of Highway 36. 812 Comment
  CHSC113073  Limosella acaulis Lowell Ahart; John Dittes 2013-7-23 18889 A Lassen Around a man made pond, 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
  JEPS123907  Limosella acaulis Lowell Ahart 2015-4-24 20068 Butte About 3/4 mile north of Rutherford Road, Gray Lodge Wildlife Area, about 6 1/2 miles (air) southwest of Gridley. Comment
  SEINET10496794  Linanthus ciliatus Lowell Ahart, Peter Ahart 1984-5-28 Ahart 4645 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
  UCSC010313  Linanthus filipes Lowell Ahart 2000-6-27 8526 Butte North part of Big Bald Rock, about 100 yards south and west of the north and east forest line, about 3 air miles east of Madrone Lake, about 12 air miles northeast of Oroville 963 Comment
  UC1594568  Linanthus harknessii Lowell Ahart 1992-7-29 6887 Butte about 0.75 mi nw Lotts Lake (near Coon Hollow Creek, about 1 mi ne of the Carr Mine) 1798 Comment
  JEPS117409  Linanthus parviflorus Lowell Ahart 2010-5-7 16628 Butte On both sides of Guardian Trail, about 1/2 miles west of Highway 32, Upper Bidwell Park, about 4 1/2 miles (air) northeast of Chico 238 Comment
  CHSC31875  Lindernia dubia var. anagallidea L. Ahart 1973-6-21 255 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC51015  Lindernia dubia var. anagallidea Lowell Ahart 1990-7-4 6541 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
  JEPS120822  Lindernia dubia var. anagallidea Lowell Ahart 2013-8-8 19011 Glenn North end of Grizzly flat, strand of Black Butter Reservoir, about 9 air miles W of Orland. Comment
  JEPS98709  Linum bienne Lowell Ahart 2000-5-21 8375 Butte 2 mi N of Oroville (N margin of Table Mountain Boulevard, 300 yds SE of Garden Drive, about 1/10 mi NW of the Thermalito Diversion cut) 67 Comment
  CHSC116039  Lipocarpha micrantha Lowell Ahart; John Dittes, Josephine Guardino, Steve Green 2015-11-14 20645 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
  CHSC96951  Lipocarpha micrantha Lowell Ahart 2007-7-8 14273 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
  CHSC99803  Listera convallarioides Lowell Ahart 2008-7-16 15091 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
  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
  CAS-BOT-BC317345  Lithospermum californicum Lowell Ahart 1982-5-8 4090 Butte Along Bloomer Hill Road, about 1.25 miles W of the Oroville Quincy Highway, about 15 miles NE of Oroville. Section 31. 450 Comment
  CHSC83968  Loeseliastrum matthewsii Emma M. Ahart 2003-3-21 San Diego Desert Gardens Ocotillo Flats, north of the end of DiGiorgio Road, Borrego Springs, Anza-Borrego Desert State Park. 914 Comment
  CHSC50645  Logfia filaginoides Lowell Ahart 1990-5-25 6480 Butte Lake Oroville, east of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprise Bridge across Lake Oroville. 271 Comment
  CHSC82302  Logfia filaginoides Lowell Ahart 2002-4-27 9542 Tehama About 10 yards northwest of the cattle guard, northwest of where the road is wide and one can park, on the west side of the dirt road that leads to the tower, east of Road M2, about 8 miles west of Paskenta. 609 Comment
  CHSC113342  Logfia gallica Lowell Ahart; John Dittes 2014-5-17 19510 A 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
  CHSC84074  Logfia gallica Lowell Ahart; John Dittes 2003-5-22 10191 Shasta Along a wash, 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
  CHSC84943  Lolium multiflorum Lowell Ahart 2003-10-26 10681 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
  CHSC31716  Lolium perenne L. Ahart 1972-5-8 104 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC40458  Lolium perenne Lowell Ahart 1985-5-5 4917 Sutter Along the road, Huff Canyon, about 3/4 mile west of the Dean Cabin, Dean Ranch, Sutter Buttes. 250 Comment
  CHSC37237  Lolium temulentum L. Ahart 1982-5-30 3474 Sutter Wash, ca. 1/4 mi w of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  CHSC42095  Lomatium macrocarpum Lowell Ahart 1986-5-20 5276 Yuba Along Abernathy Road, about 2 miles west of Woodleaf. 914 Comment
  CHSC116692  Lomatium marginatum var. marginatum Lowell Ahart 2016-5-14 20822 Butte On the east 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. 57 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
  CHSC108004  Lomatium nudicaule Lowell Ahart; John Dittes 2011-6-20 17497 Lassen About 40 yards east of the stream, about 300 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
  CHSC39677  Lonicera hispidula Lowell Ahart 1983-8-21 4066 Butte Just off of Bloomer Hill Road, about 1/2 mile west of the Oroville Quincy Highway, about 15 miles north-east of Oroville. 400 Comment
  SEINET10451959  Lotus argophyllus var. fremontii Lowell Ahart, Peter Ahart 1983-6-26 Ahart 4162 Butte T21N R6E sw sec 33. Along Bean Creek Rd, ca. 2 mi s of Little Bald Rock, ca. 19 mi ne of Oroville. Foothill Woodland; 800 m. 800 Comment
  CHSC101918  Lotus corniculatus Lowell Ahart; John Dittes 2009-7-14 16077 Plumas Scraped clearing on the east side of Forest Service Road 26N22 and Forest Service Road 26N221, about 2.6 miles (air) southeast of Seneca, about 6 1/2 miles (air) south of Lake Almanor Reservoir Dam. 1607 Comment
  JEPS115100  Lotus corniculatus Lowell Ahart, John Dittes 2009-7-14 16077 Plumas Scraped clearing on the east side of Forest Service Road 26N22 and Forest Service Road 26N221, about 2.6 miles (air) southeast of Seneca, about 6 1/2 miles (air) south of Lake Almanor Reservoir Dam 1607 Comment
  JEPS115583  Lotus corniculatus Lowell Ahart 2009-5-23 15748 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 Highwat 32, about 10 miles northeast of Chico 203 Comment
  JEPS118255  Lotus denticulatus Lowell Ahart, John Dittes 2011-6-22 17545 Modoc On the west side of the road, about 30 yards north of 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 Aden [Adin], 10 miles (air) east of Lookout, Big Valley 1264 Comment
  SEINET10452685  Lotus grandiflorus var. macranthus Lowell Ahart 1985-5-15 Ahart 4982 Butte East along the dirt road, about 1/2 mile north-east of Concow Reservoir. Comment
  JEPS107490  Lotus humistratus Lowell Ahart, John Dittes 2005-6-10 12115 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
  JEPS118361  Lotus humistratus 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
  JEPS114735  Lotus micranthus Lowell Ahart 2008-5-12 14733 Butte Below the high water line of Lake Oroville, on the east side of Sucker Creek, about 40 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
  SEINET10452364  Lotus micranthus Lowell Ahart 1985-5-31 Ahart 5033 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
  UC1609037  Lotus nevadensis Lowell Ahart 1993-7-31 7135 Butte 1.5 mi se Bald Mountain (ne of Stirling City, on the w side of the dirt road) 1493 Comment
  SEINET10451995  Lotus nevadensis Lowell Ahart 1983-5-28 Ahart 4016 Butte Along trail to Feather Falls, ca. 5 mi n of the town of Feather Falls. Yellow Pine Forest; 600 m. 600 Comment
  JEPS115792  Lotus nevadensis var. 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
  JEPS115179  Lotus oblongifolius var. oblongifolius Lowell Ahart, John Dittes 2009-7-13 16046 Plumas On damp to wet soil, 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
  JEPS98308  Lotus purshianus var. purshianus Lowell Ahart 2000-6-27 8525 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
  JEPS87135  Lotus scoparius Lowell Ahart 1992-5-9 6763 Butte about 2 air mi n Oroville (on the n side of the Thermalito Diversion Pool); Lake Oroville Recreation Area 76 Comment
  SEINET10452013  Lotus scoparius Lowell Ahart 1985-5-31 Ahart 5037 Butte About 25 feet above the high water line of Lake Oroville, about 1/4 mile west of the Enterprise Launch Area, about 1 mile north-east of Oroville. Comment
  CHSC113075  Ludwigia palustris Lowell Ahart; John Dittes 2013-7-23 18904 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
  CHSC117281  Ludwigia palustris Lowell Ahart; John Dittes 2016-7-15 21220 Lassen About 50 yards west of the road and about 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC76002  Ludwigia palustris Lowell Ahart 1999-8-22 8186 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
  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
  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
  JEPS98531  Ludwigia peploides subsp. montevidensis Lowell Ahart 2000-7-18 8601 Butte On the margins of a small pond, about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 4 miles (air) southwest of Oroville. 42 Comment
  CHSC109065  Lupinus albifrons var. albifrons Lowell Ahart 2012-4-20 17895 Butte On the west side of the South Rim Trail, about 5/8 mile west of Highway 32, about 8 1/2 miles northeast of Chico, south part of Upper Bidwell Park. 254 Comment
  JEPS124247  Lupinus albifrons var. albifrons Lowell Ahart 2015-3-21 19957 Butte About one mile south of Oregon City, about 4 1/2 miles north of the intersection of Cherokee Road and Oregon Gulch Road, about 8 miles north of Oroville. Comment
  CHSC93684  Lupinus argenteus var. heteranthus Lowell Ahart; John Dittes 2005-6-1 11873 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, 3.8 miles (air) northwest of Hallelujah Junction. 1448 Comment
  JEPS118275  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2011-6-22 17556 Modoc About 50 yards east of the road, about 100 yards northeast of 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 1264 Comment
  JEPS128681  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes, Josephine Guardino 2017-6-28 21503 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
  SEINET10874148  Lupinus bicolor subsp. pipersmithii Lowell Ahart 1985-4-1 Ahart 4873 A Butte Along Table Mountain Boulevard, near the Cambell Overflow, a little south of the inter- section of Highway 70 and 149, about 7 miles north of Oroville. Comment
  SEINET10940039  Lupinus bicolor subsp. pipersmithii Lowell Ahart 1985-4-1 Ahart 4873 Butte Along Table Mountain Boulevard, near the Cambell Overflow, a little south of the inter- section of Highway 70 and 149, about 7 miles north of Oroville. Comment
  CHSC80831  Lupinus lepidus var. confertus Lowell Ahart; Vernon H. Oswald 2001-7-11 8886 Plumas On the south side of Highway 89, west of the spillway on the dam at Lake Almanor. 1374 Comment
  CHSC97527  Lupinus lepidus var. sellulus Lowell Ahart; John Dittes 2007-6-16 14119 Plumas West of a small stream, on the south side of County Road 111 (Beckwourth Genesee Road), 10 yards east of Forest Road 24N08, Red Clover Valley, about 2 miles (air) north of the north end of Lake Davis. 1647 Comment
  CHSC42529  Lupinus polycarpus Lowell Ahart 1987-5-6 5523 Butte Along the road, near the Poe Power House on the North Fork of the Feather River, about 2 miles south-east of Jarbo Gap. 277 Comment
  SEINET10472415  Luzula campestris Lowell Ahart, Peter Ahart 1984-7-19 Ahart 4740 Butte About 1 1/2 mile south-east of Bald Mountain, 3/4 mile west of Oak Point, about 4 miles north-east of Stirling City. Comment
  JEPS110174  Luzula cascadensis Lowell Ahart 2006-7-9 12932 Plumas In a small seep, in a small open area in brush, 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
  CHSC63296  Luzula comosa var. laxa Lowell Ahart 1994-6-12 7319 Plumas Near Cedar Flat, on the west side of Faggs Mine Road, south-west of a small branch of Willow Creek, about 1 1/4 miles (air) south of Bucks Lake. 1706 Comment
  CHSC94348  Luzula comosa var. laxa Lowell Ahart 2006-7-16 12970 Butte In the 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-BC441207  Luzula macrantha Lowell Ahart 1988-3-27 5940 Butte Aboaut 1/10 mile N of the bridge across the North Fork of the Feather River, about 2 miles SE of Jarbo Gap 335 Comment
  SBBG128085  Lychnis coronaria L. Ahart 2008-6-13 14826 Butte banks of Oregon Gulch, bottom of an old gold mined area, ca. 400 yards SW of the cemetery, ca. 10 mi NE of Oroville 305 Comment
  JEPS104122  Lycopus americanus Lowell Ahart 2003-9-17 10568 Tehama On a gravel bar on the south side of Deer Creek, ca 400 yd e of Highway 99, ca 5 mi (air) se of Los Molinos. 60 Comment
  RSA0015868  Lythrum hyssopifolia L. Ahart 2004-6-18 11097 Glenn 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. 204 Comment
  CHSC40636  Lythrum portula Lowell Ahart 1985-9-26 5176 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
  CHSC81127  Lythrum portula Lowell Ahart 2001-8-28 9214 Plumas Near strand of Lake Almanor, south 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
  JEPS121287  Lythrum tribracteatum Lowell Ahart, John Dittes 2013-7-23 18902 Lassen 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
  SBBG128274  Lythrum tribracteatum L. Ahart, J. Dittes 2010-8-30 17055 Modoc N side of small wash, ca. 10 yards W of the fence, S edge of the meadow, Ash Crk State Wildlife Area, 2300 feet N of Lassen County Line, ca. 3.6 mi W of Adin, ca. 8.0 mi NE of Bieber, Big Valley 1267 Comment
  CHSC36529  Madia elegans L. Ahart 1982-6-4 3543 Butte 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 304 Comment
  JEPS87530  Madia elegans Lowell Ahart 1993-6-20 6998 Butte about 1 air mi nw Lost Creek Reservoir Dam; Mooreville Ridge, Jackass Flat 1158 Comment
  CHSC46954  Madia elegans subsp. densifolia Lowell Ahart 1977-9-20 1581 Butte Along 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-BC344314  Madia exigua Lowell Ahart 1983-6-12 4050 Butte About 1 mile south of Crystal Hill, near Oregon Gulch, near Lake Oroville, about 7 miles south-west of Feather Falls 425 Comment
  CHSC94119  Madia exigua Lowell Ahart 2006-6-21 12803 Sierra On the west side of the Foote Road, about 3.7 miles (by road) southwest of Alleghany. 1093 Comment
  SBBG119945  Madia exigua L. Ahart 2006-6-21 12803 Sierra W side of the Foote Rd, ca. 3.7 rd mi SW of Alleghany 1093 Comment
  SD122590  Madia exigua Lowell Ahart 1984-6-8 4666 Butte Ponderosa Dam, ca. 2 miles northwest of Forbestown 370 Comment
  CHSC82652  Madia glomerata Lowell Ahart 2002-7-22 9878 Placer 50 yards northeast of the small natural lake, on the east side of the paved road to Lake Valley Reservoir, about 1/4 mile east of Yuba Gap and Highway 80. 1780 Comment
  CHSC92084  Madia glomerata Lowell Ahart 2005-7-31 12211 Nevada Between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2062 Comment
  CAS-BOT-BC342864  Madia glomerata Lowell Ahart 1977-9-10 s.n. Plumas Sutter Buttes Area. 2 miles west of PIlot Peak 1900 Comment
  CAS-BOT-BC342968  Madia gracilis Lowell Ahart 1982-9-13 3826 Butte Along the dirt road which is along Pinkard Creek, about 1/8 mile north of the Lost Creek Res. Dam, about 2 and 1/8 miles north-west of Strawberry Valley 1100 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
  JEPS104291  Madia gracilis Lowell Ahart 2003-7-6 10355 Yuba Near a meadow, e of the power line, ca 30 yd w of Fountain Hill Rd, ca 5 mi (air) n of Dobbins. 836 Comment
  JEPS115862  Madia gracilis Lowell Ahart, John Dittes, Josephine Guardino 2009-7-21 16112 Plumas West of a man made depression, about 20 yards east of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 miles (air) southwest of Lake Almanor 1302 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
  CHSC111156  Madia subspicata Lowell Ahart 2012-6-9 18178 Butte On the east side of Guardian Trail, about one mile south of Tem Mile House Road, about 1/8 miles west of Highway 32, Upper Bidwell Park, about 8 miles northeast of Chico. 370 Comment
  CAS-BOT-BC345234  Madia subspicata Lowell Ahart 1982-5-28 3438 Butte Sutter Buttes Area. Near North Honcut Creek, near the Peter Ahart Ranch, about 1.25 miles north and 3 miles east of Honcut 50 Comment
  SEINET10536495  Mahonia dictyota Lowell Ahart 1983-9-19 Ahart 4442 Sutter North side of South Butte, Sutter Buttes; west of Marysville. Foohill Woodland; 650 m. 650 Comment
  CHSC10706  Maianthemum racemosum Lowell Ahart 1963-7-1 Placer Near Robinson Flat. 1676 Comment
  HSC96838  Malacothrix clevelandii L. Ahart 2006-6-21 12816 Sierra S side of Foote Rd., about 2.7 mi. SW of Alleghany 1104 Comment
  CHSC45221  Malacothrix floccifera Lowell Ahart 1979-6-9 1927 Butte About 1/4 mile east of Magalia. 640 Comment
  SBBG128805  Malacothrix floccifera L. Ahart, J. Dittes, J. Guardino 2013-4-26 18627 Butte 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
  CHSC101814  Malva nicaeensis Lowell Ahart 2009-6-12 15840 Butte At the Bear's Lair Picnic Area and Coastal Redwood Grove sign, about 80 yards east of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  CDA38815  Malva parviflora L. Ahart 2012-4-6 17815 Butte On the north side of Big Chico Creek, Lost Park in Bidwell park, city of Chico. 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
  CHSC112040  Malvella leprosa Lowell Ahart 2012-8-24 18430 Glenn On dry bare gravelly gray soil, on the strand of Black Butte Reservoir (west side), about 3 miles north of the bridge across Stony Creekand the upper reaches of Black Butte Reservoir. 136 Comment
  JEPS103438  Malvella leprosa Lowell Ahart 2002-11-5 10016 Tehama 12 air mi NW of Orland (E of where Burris Creek runs into Black Butte Lake) 152 Comment
  RSA795694  Malvella leprosa L. Ahart 2012-8-24 18430 Glenn 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
  CHSC31531  Marsilea vestita L. Ahart 1971-6-5 77 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC116172  Marsilea vestita subsp. vestita Lowell Ahart; John Dittes 2015-6-22 20248 Tehama About 1/4 mile north of Lassen Road, about 1.7 miles northeast 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. 74 Comment
  CHSC97255  Marsilea vestita subsp. vestita Lowell Ahart 2007-8-19 14483 Butte About 2 1/4 miles (air) southeast of Honcut, about 13 miles (air) southeast of Oroville. 49 Comment
  CHSC98830  Marsilea vestita subsp. vestita Lowell Ahart; John Dittes, Josephine Guardino 2008-4-12 14679 Merced On dry soil, in a vernal pool, along 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
  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
  CHSC42764  Matricaria discoidea Lowell Ahart 1977-4-5 1242 Sutter Near the old gas well on the south-west side of the South Butte, Sutter Buttes. 182 Comment
  JEPS114749  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-22 15024 Lassen End of a levee, about 100 yards east of the tall poles, 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
  JEPS118334  Matricaria occidentalis Lowell Ahart, John Dittes 2011-6-22 17542 Modoc On the west side of the road, about 30 yards north of 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 Aden [Adin], 10 miles (air) east of Lookout, Big Valley. 1264 Comment
  CHSC10794  Meconella californica Lowell Ahart 1965-4-15 Butte Swede's Flat Road. 91 Comment
  CHSC61918  Medicago lupulina Lowell Ahart 1993-11-1 7274 Butte On the banks of an irrigation ditch, on the Rice Experiment Station, on the south side of Butte City Highway, east of the Southern Pacific Railroad, west of Riceton Road, about 3 1/4 miles north-west of Biggs. 30 Comment
  CHSC76108  Medicago lupulina Lowell Ahart 1999-9-5 8193 Yuba On the disturbed area on the south side of Woodruff Lane, just west of Kimball Lane, about 5 miles (air) northeast of Marysville. 24 Comment
  JEPS107816  Medicago lupulina Lowell Ahart, John Dittes 2005-6-2 11966 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
  JEPS115113  Medicago lupulina Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16233 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
  JEPS115379  Medicago lupulina Lowell Ahart 2009-6-3 15834 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 Highway 32, about 10 miles northeast of Chico 234 Comment
  RSA699256  Medicago lupulina L. Ahart, Samantha Mackey Hillaire 2004-7-9 11218 Tehama Seep on the east side of Ponderosa Way (Forest Road 28N29), at the sign, at the Black Rock, south of the Black Rock Campground and bridge across Mill Creek, about 26 miles (air) east of Red Bluff. 675 Comment
  CHSC46156  Medicago polymorpha Lowell Ahart 1975-5-12 769 Butte Peter Ahart Ranch, about 12 miles south of Oroville. 45 Comment
  CHSC97677  Medicago polymorpha Lowell Ahart 2007-5-14 13871 Yuba About 20 yards northeast of the second power tower, about 400 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 28 Comment
  CHSC82298  Medicago praecox Lowell Ahart 2002-4-27 9566 Tehama In the road curve, on the north side of Road M2, about 20 yards northwest of the dirt road that leads to the tower, about 8 miles west of Paskenta. 609 Comment
  JEPS115313  Medicago praecox Lowell Ahart 2009-4-22 15575 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
  CHSC96877  Melica aristata Lowell Ahart 2007-6-12 14066 Butte North of the parking area at Big Bald Rock, about 14 miles (air) northeast of Oroville. 893 Comment
  CHSC44576  Melica californica Lowell Ahart 1978-6-4 1755 Sierra Above the Foote Road, about 1 mile south of Alleghany. 1280 Comment
  CAS-BOT-BC282094  Melica fugax Lowell Ahart 1979-7-18 s.n. Plumas Ca 1 mile W of Pilot Peak, along and above the road. Area about 1/8 mile S of Onion Valley 1800 Comment
  CHSC101869  Melica fugax Lowell Ahart; John Dittes, Josephine Guardino 2009-6-15 15905 Plumas About 200 yards west of Lake Almanor Dam, on the north side of the road under the pole line. 1421 Comment
  CHSC97186  Melica fugax Lowell Ahart; John Dittes, Josephine Guardino 2007-6-8 13993 Plumas East side of an open rocky flat, about 50 yards east of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1965 Comment
  RSA754960  Melica fugax L. Ahart, John Dittes, Josephine Guardino 2009-6-15 15905 Plumas Road under the pole line, about 200 yards west of the Lake Almanor Dam. 1422 Comment
  CAS-BOT-BC281300  Melica harfordii Lowell Ahart 1983-7-24 4216 Butte On the road cutbank at the Forbestown Res., ca 5 miles NE of Forbestown 450 Comment
  RSA718332  Melica harfordii L. Ahart 2006-6-9 12648 Butte On the west side of 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. 404 Comment
  RSA724820  Melilotus albus L. Ahart 2006-9-26 13349 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road about 3 miles west of Colusa Princeton Road, about 5 1/2 mils east of Maxwell. 24 Comment
  CDA4207  Melilotus indicus L. Ahart 2004-6-18 11094 Glenn 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. Comment
  HSC96978  Melilotus indicus L. Ahart 2005-5-2 11772 Butte E side of the Sacramento River, NW of Parrott Landing, about 1 mi. SE of Ord Ferry, about 2 mi. SE of Ordbend, about 12 mi. SW of Chico. 26 Comment
  JEPS127091  Melilotus indicus Lowell Ahart, Josephine Guardino 2016-4-19 20801 Contra Costa 1.4 miles northwest of Los Vaqueros Reservoir Marina, 1.9 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 Spring USGS 7.5' Quad. Comment
  CHSC112987  Melilotus officinalis Lowell Ahart; John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CDA34659  Mentha X piperita L. 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. Comment
  RSA769187  Mentha X piperita L. 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 air miles west of Winters 135 Comment
  CHSC102616  Mentha arvensis Lowell Ahart 2009-7-9 16009 Butte Along streams, 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
  CHSC103163  Mentha arvensis Lowell Ahart 2009-11-19 16543 Butte North of the rose thicket, about 30 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. 209 Comment
  CHSC113027  Mentha arvensis Lowell Ahart 2013-8-8 19014 Glenn North end of Grizzly Flat, strand of Black Butte Reservoir, about 9 miles (air) west of Orland. 132 Comment
  CDA32019  Mentha canadensis L. Ahart, J. Dittes, J. Guardino 2009-7-29 16243 Plumas Below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam. Comment
  CHSC51266  Mentha canadensis Lowell Ahart 1990-10-3 6622 Butte Growing 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
  CHSC81125  Mentha canadensis Lowell Ahart 2001-8-29 9257 Plumas On the bottom of Little Last Chance Creek, on the strand of Frenchman Lake. 1700 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
  CHSC93682  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
  CHSC94314  Mentzelia laevicaulis Lowell Ahart 2006-8-9 13109 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  UCD102799  Micranthes californica L. Ahart 1975-3-3 700 Butte Near north boundary of ranch near North Honcut Creek; Peter Ahart Ranch, Honcut. Comment
  JEPS104031  Microseris acuminata Lowell Ahart 2003-4-10 10058 Butte Near the e side of the ''sunken area,'' ca 150 yd w of the e rim of South Table Mountain, ca 2 1/2 mi (air) n of Oroville. 320 Comment
  CHSC114968  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Along Bear Valley Road, in Bear Valley, about 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles south of Highway 20. 395 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
  JEPS103578  Microseris elegans Lowell Ahart 2002-5-5 9602 Nevada On the S side of McCortney Road, 20 yards S of the bridge across Rock Creek, ca 3 miles (air) NE of Camp Far West Dam. 106 Comment
  CHSC116680  Microseris nutans Lowell Ahart; John Dittes 2016-4-29 20817 Tehama On north side of the trail, about 400 yards south of the fish ladder on Deer Creek, northwest of a flat area (campground) above Deer Creek, about 0.8 mile (air) northeast of USFS Road 27N08 Bridge over Deer Creek, about 2 1/8 miles by trail to Highway 32. 935 Comment
  CHSC32075  Microseris nutans L. Ahart 1975-8-17 948 Sierra Near edge of Jones Valley, 3 mi w and 2 mi s of Webber Lake. 2286 Comment
  CHSC39372  Microseris nutans L. Ahart; P. Ahart 1983-8-17 4326 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. 2000 Comment
  CAS-BOT-BC322759  Microseris sylvatica Lowell Ahart 1979-4-19 s.n. Butte Peter Ahart Ranch, Honcut 50 Comment
  JEPS88903  Mimulus bicolor Lowell Ahart 1994-6-5 7293 Yuba about 3 air mi e of Forbestown (on n side of Costa Creek, on n side of Forbestown Road); Costa Creek, Forbestown Road 853 Comment
  JEPS121953  Mimulus breweri Lowell Ahart 2014-7-7 19590 Butte About 1/2 mile (air) north of Philbrook Reservoir. Comment
  UC1586480  Mimulus breweri Lowell Ahart 1991-7-22 6679 Sierra about 1/4 mi s Henness Pass Road (about 3 mi nw of Webber Lake); French Meadow 2133 Comment
  JEPS110093  Mimulus floribundus Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC113626  Mimulus guttatus Lowell Ahart 2014-8-31 19800 B Plumas Strand, cobbles, in and along the sides of Black Rock Creek, about 200 yards south of the foot bridge across Black Rock Creek, about 200 yards south of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. 1536 Comment
  CHSC117184  Mimulus guttatus Lowell Ahart; John Dittes 2016-6-7 21009 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC118538  Mimulus guttatus Lowell Ahart; John Dittes, Josephine Guardino 2017-6-27 21432 Nevada In drying seeps, mountainside, about 200 yards north of Carpenter Meadow, about 4.9 miles (air) northwest of Truckee, Basin of Prosser Creek, Carpenter Valley. 1938 Comment
  JEPS104104  Mimulus guttatus Lowell Ahart 2003-8-23 10534 Tehama Along and in a small streamlet, on both sides of the trail, ca 1/4 mi from the campsite as one hikes to Square Lake, ca 1 mi ne of Mount Linn, South Yolla Bolly. 2118 Comment
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Jul 29 2009
  JEPS115190  Mimulus guttatus Lowell Ahart 2009-6-19 15926 Butte On wet soil, drainage in meadow, about 30 yards south of the fence and about 100 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
  CDA41713  Mimulus kelloggii L. Ahart 1998-6-3 7971 Butte About 1/4 mile north of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. Comment
  SEINET10929285  Mimulus laciniatus Lowell Ahart, L. Hanson 1985-5-20 Ahart 5027 Butte About 1/2 mile east of Little Bald Rock, N of Oroville. Comment
  JEPS122101  Mimulus lewisii Lowell Ahart 2014-8-24 19754 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
  JEPS106014  Mimulus microphyllus Lowell Ahart 2004-6-28 11126 Tehama Gravel bar on the south side of Thomes Creek, about 1/4 mile east of Paskenta 213 Comment
  JEPS108978  Mimulus microphyllus Lowell Ahart 2006-10-8 13395 Plumas Gravel bar on the west side of Chips Creek, just south of the bridge on Highway 70, about 1 1/4 miles southwest of Belden 715 Comment
  JEPS115182  Mimulus moniliformis Lowell Ahart 2009-6-30 15978 Butte 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
  CHSC102628  Mimulus moschatus Lowell Ahart; John Dittes, Josephine Guardino 2009-8-27 16329 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 between Sec 23 SE1/4 and Sec 24 SW1/4. 1493 Comment
  HSC96897  Mimulus nanus var. mephiticus L. Ahart 2006-6-21 12837 Sierra Ca. 30 yds W of road, about 2.5 mi. (by road) W of Forest 1398 Comment
  JEPS114717  Mimulus nasutus Lowell Ahart 2008-5-21 14774 Butte Damp to 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, where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile northwest of the Ponderosa Dam Comment
  JEPS107525  Mimulus torreyi Lowell Ahart 2005-7-23 12193 Nevada South of the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  CHSC65195  Minuartia cismontana Lowell Ahart 1995-5-30 7588 Butte Along the edge of the dirt road, about 1/10 mile south-east of the reservoir, north of Beatson Hollow, about 2 miles north-west of Cherokee Road, North Table Mountain, about 7 miles north of Oroville. 304 Comment
  SEINET13711198  Moenchia erecta Lowell William Ahart, Lowell William Ahart 2000-1 8332 Butte 10 Air Mi. NE of Oroville at Oak Grove Cemetery (T19N, R5E, sec 23, Ctr.) 1800 Ft. 549 Comment
  CAS-BOT-BC435056  Mollugo verticillata Lowell Ahart 1982-5-30 3466 Sutter About 1/8 mile west of the Myers home, Myers Ranch, Sutter Buttes 50 Comment
  CAS-BOT-BC219945  Monardella breweri subsp. lanceolata Lowell Ahart 1984-6-8 4662 Butte Along Ponderosa Way, about 1/8 mile west of the Ponderosa Dam, about 2 miles north-west of Forbestown 370 Comment
  GH400511  Monardella breweri subsp. lanceolata L. Ahart 1983-8-10 4273 Unknown along the Peterson Ridge Road, about 5 miles east of Challenge Comment
  SEINET10836958  Monardella lanceolata Lowell Ahart 1984-6-8 Ahart 4662 Butte Along Ponderosa Way, ca. 1/8 mi W of Ponderosa Dam, ca. 2 mi NW of Forbestown; Yellow Pine Forest; 370 m. 370 Comment
  SEINET10968986  Monardella lanceolata Lowell Ahart, Peter Ahart 1984-5-28 Ahart 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; Foothill Woodland; 450 m. 450 Comment
  JEPS120753  Monardella odoratissima Lowell Ahart 2013-9-11 19024 Plumas On east side of Antelope Creek, Strand of Antelope Lake, west of the paved road, south of Antelope Creek about 16 air miles NE of Taylorsville. Comment
  CAS-BOT-BC221975  Monardella odoratissima subsp. glauca Lowell Ahart 1979-7-18 s.n. Plumas Ca. 2 mi. NW of Pilot Pk. 1800 Comment
  CHSC92136  Monardella odoratissima subsp. pallida Lowell Ahart; John Dittes 2005-9-20 12433 Plumas On the east side of Mud Lake, anout 1/2 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2034 Comment
  UCR280843  Monardella odoratissima subsp. pallida Lowell Ahart 2016-8-30 21327 Plumas C. 100 yards west of the Pacific Crest Trail on Bunker Hill Ridge, c. 1.5 air miles southeast of Pilot Peak 2045 Comment
  JEPS108795  Monardella sheltonii Lowell Ahart 2006-6-9 12655 Butte On the east 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
  JEPS126594  Monardella sheltonii Lowell Ahart 2016-6-29 21051 -A Butte On the north side of Lumpkin Road, about 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. Comment
  RSA794956  Monardella sheltonii L. Ahart, Josephine Guardino, John Dittes 2009-7-29 16218 Plumas North side of Forest Service Road 26N22, 4650 feet northwest of Rattlesnake Hill, 3.0 air miles SSE of Lake Almanor Dam. 1591 Comment
  JEPS106206  Monardella villosa subsp. villosa Lowell Ahart 2004-5-29 10961 Sutter On a slope above a steep draw, about 300 yards south of the fence on the northwest side of the South Butte, Sutter Buttes, about 5 miles (air) northwest of Sutter 310 Comment
  JEPS118264  Montia dichotoma Lowell Ahart, John Dittes 2011-6-22 17551 Modoc On the west side of the road, about 50 yards north of 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 Aden [Adin], 10 miles (air) east of Lookout, Big Valley 1264 Comment
  CHSC82461  Montia fontana Lowell Ahart 2002-6-26 9795 Plumas Growing along and in a small stream, about 150 yards north of the gravel road, about 1/4 mile (air) west of Lumpkin Ridge Road, about 1 mile (air) southeast of Tamarack Flat, about 2 miles (air) northwest of Little Grass Valley Reservoir dam, about 5 miles (air) northwest of La Porte. 1718 Comment
  JEPS119846  Montia fontana subsp. amporitana Lowell Ahart 2012-3-23 17792 Butte About 200 yards east of Big Chico Creek, about 200 yards west of Ten Mile House Road, below and north of the old homestead, about 3/4 mile west of Highway 32, about 9 miles (air) northeast of Chico. Comment
  SEINET10572713  Montia fontana subsp. amporitana Lowell Ahart 1984-3-24 Ahart 4516 Sutter Myers Ranch, Sutter Buttes, west of Marysville. Foothill Woodland; 50 m. 50 Comment
  SEINET516349  Montia fontana subsp. amporitana Lowell Ahart 1974-12-11 301 Butte Growing on early drying soil near the edges of large rocks, Peter Ahart Ranch, about 1 1/4 mi. N and 1 1/4 mi. E of Honcut, about 12 mi. S of Oroville. 43 Comment
  CHSC44580  Muhlenbergia asperifolia Lowell Ahart; John Thomas Howell 1974-7-9 519 Lassen In a meadow along the south shore of Eagle Lake. 1584 Comment
  CAS-BOT-BC267010  Muhlenbergia filiformis Lowell Ahart 1986-9-10 5398 Plumas About 1 mile NW of Pilot Peak, about 14 miles NE of La Porte 1950 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
  JEPS103480  Muhlenbergia filiformis Lowell Ahart 2002-10-9 9972 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
  JEPS106252  Muhlenbergia filiformis Lowell Ahart, Samantha Mackey Hillaire 2004-7-9 11190 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
  UC1609254  Muhlenbergia filiformis Lowell Ahart 1993-7-23 7093 Butte on large gravel bar on w side of river about 100 yards w bridge across Fall River (about 6 (air) mi ne of Feather Falls); Fall River 1036 Comment
  SEINET256564 Image available Muhlenbergia jonesii Lowell Ahart 1985-10-12 5198 Butte Near the east side of Kunkle Rexervoir about 2 miles south of Paradise. 503 Comment
  CHSC116152  Muhlenbergia mexicana Lowell Ahart 2015-10-26 20604 Butte Strand of Lake Oroville, on west side of West Branch of Feather River, about 1 mile (air) southeast of Kunckle Reservoir, about 5 miles (air) southeast of Paradise. 207 Comment
  CHSC59050  Muhlenbergia minutissima Lowell Ahart 1992-7-21 6799 Butte On the sides of a lake, on the south side of Coon Hollow, about 2 (air) miles north-east of Philbrook Reservoir. 1737 Comment
  CHSC117514  Muhlenbergia richardsonis Lowell Ahart; John Dittes 2016-7-13 21146 Lassen 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. 1289 Comment
  JEPS119854  Muhlenbergia richardsonis Lowell Ahart, John Dittes 2012-7-10 18325 Modoc Ash Creek State Wildlife Area, about 3.6 miles (air) west of Adin, about 8.0 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC274934  Muhlenbergia rigens Lowell Ahart 1977-2-20 s.n. Butte Peter Ahart Ranch, Honcut Comment
  CHSC97625  Myosotis discolor Lowell Ahart; John Dittes 2007-6-16 14108 Plumas On damp gravelly soil, gravel bars 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
  JEPS116098  Myosotis discolor Lowell Ahart 2009-5-15 15717 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 Highway 32, about 10 miles northeast of Chico 234 Comment
  CAS-BOT-BC83249  Myosurus minimus Lowell Ahart 1983-5-14 4006 Sutter Along West Butte Road, about 1/8 mile north of the Sacramento Outing Club, Sutter Buttes. 35 Comment
  CAS-BOT-BC83266  Myosurus minimus Lowell Ahart 1981-4-6 2746 Butte Southeast of the Gray Lodge Headquarters, ca. 8 miles southwest of Gridley. 35 Comment
  RSA325163  Myosurus minimus L. Ahart 1984-4-19 4547 Sutter Along W Butte Road, 1.8 mile N of Sacramento Outing Club, Sutter Buttes, W of Marysville. 34 Comment
  CHSC61920  Myriophyllum aquaticum Lowell Ahart 1993-10-31 7271 Butte Pond, on the north side of Grubbs Road, about 4 miles east of Palermo. 152 Comment
  JEPS124128  Myriophyllum hippuroides Lowell Ahart 2015-10-3 20537 Plumas 100 yards east of the Round Valley Reservoir Dam, about 2 1/2 miles (air) northwest of Crescent Mills. Comment
  SEINET11268246  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.; 0 38 Comment
  JEPS98333  Narthecium californicum Lowell Ahart 2000-7-13 8592 Sierra 7 air miles NE of Alleghany (upper W branch of Black Jack Ravine, W side of Forest Hwy 98, Harris Meadow) 1615 Comment
  CAS-BOT-BC260293  Nassella pulchra Lowell Ahart 1977-4-5 s.n. Sutter S side of South Butte, Sutter Buttes 200 Comment
  CHSC31723  Nassella pulchra L. Ahart 1975-5-12 764 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC60376  Nasturtium officinale Lowell Ahart 1989-5-31 6332 Butte North of the end of Truex Road, near Lake Oroville, about 0.25 mile NW of the West Branch Bridge across Lake Oroville. 304 Comment
  CHSC87946  Navarretia capillaris Lowell Ahart 2004-6-28 11138 Tehama Gravel bar on the south side of Thomes Creek, about 1/4 mile east of Paskenta. 213 Comment
  CHSC44331  Navarretia divaricata Lowell Ahart; John Thomas Howell 1974-7-9 541 Lassen Along Eagle Lake Road, on the south-west side of Eagle Lake. 1584 Comment
  CHSC92093  Navarretia divaricata subsp. divaricata Lowell Ahart 2005-7-31 12227 Nevada In a small meadow and near a small wash, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit. 2062 Comment
  CHSC97577  Navarretia divaricata subsp. divaricata Lowell Ahart; John Dittes 2007-6-17 14155 Plumas On the sides of a small wash, about 20 yards west of Red Clover Creek, about 10 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
  JEPS123962  Navarretia divaricata subsp. divaricata Lowell Ahart 2015-7-4 20288 Plumas About 1/2 mile north of the intersection of Lumpkin Ridge Road and road to Little Grass Valley Reservoir, about 1 1/2 miles (air) north of Little Grass Valley Reservoir Dam. Comment
  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
  JEPS117233  Navarretia heterandra Lowell Ahart 2010-6-20 16833 Butte 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
  CHSC39340  Navarretia intertexta Lowell Ahart 1983-6-26 4140 Butte Along the East Fork of Canyon Creek, along Ponderosa Way, about 14 miles north-east of Oroville. Note: the sign gives Big Ridge Road instead of Ponderosa Way. 500 Comment
  CDA40269  Navarretia intertexta subsp. intertexta L. Ahart 2005-6-6 11997 Butte On the west side of North Honcut Creek, Peter Ahart Ranch, about 1 1/4 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. Comment
  CHSC106180  Navarretia intertexta subsp. intertexta Lowell Ahart; John Dittes 2010-8-30 17056 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 8.0 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117294  Navarretia intertexta subsp. intertexta Lowell Ahart; John Dittes 2016-7-13 21131 Lassen Along the west edge of the pond, 90 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
  JEPS121307  Navarretia intertexta subsp. propinqua Lowell Ahart 2013-7-22 18853 Lassen 10 yards S of a man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  HSC96840  Navarretia jepsonii L. Ahart 2004-6-11 11021 Tehama E of Dead Rabbit Lake along trail, 50 yds. W of Nomalaki Trail, 1.5 mi. NW of Bowers Creek, 2.25 mi. NW of FS Rd. 23N69, 8 mi. SW of Paskenta 550 Comment
  JEPS104075  Navarretia jepsonii Lowell Ahart 2003-7-14 10385 Colusa 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
  JEPS105971  Navarretia jepsonii Lowell Ahart 2004-6-11 11021 Tehama East of Dead Rabbit Lake, along trail to Dead Rabbit Lake, ca. 50 yd W of the Nomalaki Trail, ca. 1 1/2 mi NW of Bowers Creek, ca. 2 1/4 mi NW of Forest Rd 23N69 (Mud Flat Rd), ca. 8 mi (air) SW of Paskenta 549 Comment
  RSA718440  Navarretia leptalea L. Ahart 2006-7-9 12935 Plumas about 20 yards south of the paved basalt road, about 3 3/4 miles (air) nw of Tamarack Flat, about 5 3/4 miles (air) nw of Little Grass Valley Reservoir 1662 Comment
  CHSC97090  Navarretia leptalea subsp. bicolor Lowell Ahart; Josephine Guardino 2007-7-21 14381 Plumas Bottom of a small drying stream, about 60 yards south of the Beckwourth Taylorsville Road, south of the intersection with Forest Road 25N41Y, about 2 1/4 miles (air) northwest of the most northwest part of Lake Davis. 1799 Comment
  JEPS122301  Navarretia leptalea subsp. leptalea Lowell Ahart 2014-8-31 19829 Plumas On the east side of Black Rock Creek, about 300 yards south of the foot bridge across Black Rock Creek, about 300 yards south of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. Comment
  RSA0105476  Navarretia leptalea subsp. leptalea Lowell Ahart 2014-8-31 19829 Plumas On the east side of Black Rock Creek, about 300 yards south of the foot bridge across Black Rock Creek, about 300 yards south of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. 1536 Comment
  CHSC31825  Navarretia leucocephala L. Ahart 1977-4-15 1296 Butte Peter Ahart Ranch, Honcut. On bottom of vernal pool. 50 Comment
  CHSC112753  Navarretia leucocephala subsp. leucocephala Lowell Ahart; John Dittes 2013-7-22 18851 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
  JEPS117326  Navarretia leucocephala subsp. leucocephala Lowell Ahart 2010-5-22 16718 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
  RSA0116718  Navarretia nigelliformis subsp. nigelliformis L. Ahart, Jack Lindsay 2005-5-31 11834 Sutter On the north side of the dirt private road, about 1/2 mile north of Malott Road, about 2 miles (air) northeast of Sutter. 20 Comment
  CHSC31827  Navarretia pubescens L. Ahart 1977-5-8 1362 Butte Peter Ahart Ranch, Honcut. In pasture fields. 50 Comment
  JEPS107902  Navarretia pubescens Lowell Ahart, Jack Lindsay 2005-5-31 11832 Sutter North of 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
  JEPS124040  Navarretia sinistra subsp. sinistra Lowell Ahart, John Dittes 2015-8-5 20463 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
  CHSC84261  Navarretia viscidula Lowell Ahart; John Dittes 2003-6-11 10252 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
  CHSC80627  Nemacladus montanus Lowell Ahart 2001-6-8 8767 Tehama On the west side of road M2, about 9 miles west of Paskenta. 792 Comment
  RSA754791  Nemophila heterophylla L. Ahart 2009-4-26 15641 Butte South side of Guardians Trail, about 30 yards SW of Pine Trail, Upper Bidwell Park, about 3/8 air miles SW of the intersection of Hwy 32 and Ten Mile House Road, about 10 miles NE of Chico. 382 Comment
  CHSC45931  Nemophila pedunculata Lowell Ahart 1981-3-14 2699 Sutter Dean Ranch, Sutter Buttes. 304 Comment
  CHSC90799  Nemophila pedunculata Lowell Ahart; P. Maslin, S. Green, J. Guardino, J. Dittes 2005-2-6 11554 Butte Butte Creek Ecological Reserve. About 50 yards east of Chico Canyon Road, about 1/2 mile west of Highway 32, about 8 miles northeast of Chico. 242 Comment
  JEPS117154  Nemophila pedunculata Lowell Ahart 2010-4-30 16588 Butte 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
  JEPS124091  Nemophila spatulata Lowell Ahart 2015-6-7 20220 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
  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
  CHSC112842  Nicotiana attenuata Lowell Ahart; John Dittes 2013-7-25 18970 Modoc Elkins Lane 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
  JEPS114499  Nicotiana attenuata Lowell Ahart, John Dittes 2008-8-25 15319 Modoc On the east bank of the Pit River (flood plain), about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout 1273 Comment
  JEPS119914  Oenothera elata subsp. hirsutissima Lowell Ahart 2012-10-28 18537 Butte On the south side of the paved park road, southwest of the old walnut orchard, south of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. Comment
  JEPS120001  Olea europaea Lowell Ahart 2012-4-30 17940 Butte On east side 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. Comment
  RSA767794  Olea europaea L. Ahart 2010-6-1 16750 Butte North side of Guardian s Trail, about 100 yards east of the end of Centennial Avenue, Upper Bidwell Park, about 0.5 miles east of Chico Canyon Road. 126 Comment
  CHSC83452  Ophioglossum californicum Lowell Ahart 2003-1-16 10022 Butte Near a wash, open pasture field, Joie Osgood Ranch, about 2 1/2 miles north and 3 and 3/4 miles east of Honcut, about 12 miles southeast of Oroville. 68 Comment
  CHSC91259  Opuntia fragilis Lowell Ahart; John Dittes 2005-6-10 12101 Siskiyou 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
  CHSC82505  Orobanche fasciculata Lowell Ahart; John Dittes 2002-6-17 9719 Butte About 150 yards southeast of Lumpkin Ridge Road, about 2 miles east of the intersection of Lumpkin Ridge Road, County Road, and road to Fall River, about 6 3/4 miles (air) northeast of Feather Falls. 1289 Comment
  CHSC45520  Orthilia secunda Lowell Ahart 1977-8-2 1530 Sierra North side of Mount Fillmore, about 12 miles north-east of La Porte. 2103 Comment
  JEPS107539  Orthilia secunda Lowell Ahart 2005-7-23 12179 Nevada South of the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  CHSC94722  Osmorhiza chilensis Lowell Ahart 2006-6-15 12754 Glenn On the west side of the creek, about 250 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. 605 Comment
  CHSC42495  Oxyria digyna Lowell Ahart 1977-8-2 1531 Sierra In a large broken rock pile on the north side of Mt. Fillmore, near the summit, about 12 miles north-east of La Porte. 2255 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
  JEPS104240  Packera clevelandii Lowell Ahart 2003-7-14 10393 Lake Near a small stream, at Barrel Spring, ca 1 1/2 mi (air) south of Bartlett Springs Rd, ca 2 mi (air) w of Bear Valley. 396 Comment
  JEPS110354  Packera clevelandii Lowell Ahart 2006-5-11 12701 Glenn On the south side of Forest Road 18N03, about 1/2 mile (by road) east of the ford of Stony Creek, about 2 miles (air) northeast of North Fork Campground, about 5 1/4 miles (air) west-northwest of Stonyford 819 Comment
  CAS-BOT-BC316983  Packera layneae Lowell Ahart 1980-6-19 2409 Yuba 4 miles east of Challenge 900 Comment
  CHSC31631  Panicum capillare L. Ahart 1974-7-19 550 Butte Along banks of North Honcut Creek. Peter Ahart Ranch, Honcut. 45 Comment
  JEPS106186  Panicum capillare Lowell Ahart 2004-10-4 11440 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 446 Comment
  RSA724818  Panicum capillare L. Ahart 2006-8-22 13222 Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS107577  Parnassia fimbriata Lowell Ahart 2005-8-30 12364 Nevada On cliffs, south of the old road, south of the old Highway 80, southeast of Donner Pass and Donner Summit 2054 Comment
  CAS-BOT-BC181180  Paronychia ahartii Lowell Ahart 1974-5-5 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  JEPS118020  Paronychia ahartii Lowell Ahart, John Dittes 2011-6-9 17442 Tehama Rio De Los Molinos Land Grant. On a sand dune, about 60 yards east of a large vernal pool, sand dune area, about 30 yards south of the fence, 1.6 miles (air) east of Highway 99, 2.4 miles (air) north of Vina 80 Comment
  SEINET516345  Parvisedum pumilum Lowell Ahart 1983-1 3961 Sutter Growinf on damp bare thin poor soil in a pasture field, on the S side of Pass Rd., about 2 mi W of Kellogg Rd., Sutter Buttes. 46 Comment
  CHSC78964  Paspalum distichum Lowell Ahart 2000-10-2 8697 Butte Northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) soutwest of Chico. 32 Comment
  CHSC61709  Pectiantia pentandra Lowell Ahart 1993-8-8 7149 A. Butte On bottom of stream, in area mined for gold, about 1/2 mile north-west of Lewis Flat, about 3/4 mile north-west of the Sly Creek Dam. 1097 Comment
  CHSC61206  Pectocarya penicillata Lowell Ahart 1993-4-8 6928 Butte Oroville Wildlife Area, south of the Feather River, about 3 1/2 miles (air) south of Thermalito. 36 Comment
  JEPS87510  Pectocarya penicillata Lowell Ahart 1993-4-8 6928 Butte 3.5 air mi s Thermalito (s of the Feather Rv, Oroville Wildlife Area); Oroville Wildlife Area 36 Comment
  JEPS114507  Pedicularis racemosa Lowell Ahart 2008-8-14 15201 Plumas 200 yards northeast of the metal gate, east side of Forest Road 22N68, about 100 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
  JEPS127128  Pedicularis racemosa Lowell Ahart 2016-9-9 21343 Yuba After crossing Slate Creek on Old County Road to Scales, take first road to the right and go about 1/2 mile near Stowman Ravine, about 3 miles (air) southwest of Poverty Hill mine, about 8 miles (air) southwest of La Porte. Comment
  CHSC114990  Pediomelum californicum Lowell Ahart 2015-4-28 20100 Lake About 150 yards west of Barrel Spring Meadow, 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. 696 Comment
  CHSC116667  Pellaea mucronata var. californica Lowell Ahart; John Dittes, Josephine Guardino 2016-2-11 20701 A Tehama On both sides of Deer Creek Trail, about 150 yards north of the fish ladder on Deer Creek, about 2 miles by trail to Highway 32. 883 Comment
  JEPS127253  Pellaea mucronata var. mucronata Lowell Ahart, John Dittes, Josephine Guardino 2016-2-11 20701 -A Tehama About 2 miles by trail to Highway 32. Comment
  CHSC10778  Penstemon deustus var. suffrutescens Lowell Ahart 1969-5-11 Plumas 15 miles S. W. of Quincy on Hwy 70. 914 Comment
  CHSC63179  Penstemon deustus var. suffrutescens Lowell Ahart 1994-7-1 7421 Sierra On slope on the north side of Henness Pass Road, at Keystone Gap, east of Keystone Mountain, about 1 1/2 miles north-east of Middlewaters, about 11 miles (air) northeast of Alleghany. 1950 Comment
  RSA716056  Penstemon deustus var. suffrutescens L. Ahart 2005-6-9 12037 Siskiyou About 3/5 mile (air) south of Highway 99/97 Cutoff, about 2 1/2 miles (air) east-southeast of Grenada. 775 Comment
  CHSC43486  Penstemon gracilentus Lowell Ahart 1974-7-9 524 Lassen Along the edge of Eagle Lake Road, about 5 miles west of Susanville. 1584 Comment
  RSA407922  Penstemon heterophyllus subsp. purdyi L. Ahart 1984-6-8 4679 Butte Along the dirt road near the water tower, above the generator, ca. 1 mile E of Ponderosa Dam, ca. 2 miles N of Forbestown. 475 Comment
  CHSC115299  Penstemon laetus Lowell Ahart 2015-4-30 20136 Yuba On dry soil, road cut, on the east side of La Porte Road, about 2 1/4 miles (air) southwest of Brownsville, about 2 miles (air) northeast of Rackerby. Foothill Woodland. 504 Comment
  CHSC93546  Penstemon laetus var. sagittatus Lowell Ahart; John Dittes 2005-6-9 12029 Siskiyou Hill, south of a rock fence, about 100 yards northeast 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-BC245635  Penstemon personatus Lowell Ahart 1984-7-19 4761 Butte About 1 mile north-east of Bald Mountain, about 6 miles north-east of Stirling City 1900 Comment
  SEINET12331900  Penstemon personatus L. Ahart, Ahart, P. 1984-1 4671 Butte about 1/2 mi E of Bald Mtn, about 5 mi NE of Stirling City 1900 Comment
  CHSC87627  Penstemon roezlii Lowell Ahart; John Dittes, Josephine Guardino 2004-5-24 10954 Plumas Along the margins of an old logging road, about 400 yards south of a good dirt forest road, about 1/8 mile north of the railroad, Greenhorn Creek, and Highway 70, about 3/4 mile west of Squirrel Creek, about 7 miles (air) southeast of Quincy. 1251 Comment
  UCD124153  Penstemon roezlii L. Ahart 1982-7-28 3719 Sierra Along dirt road near Pacific Mine, ca. 5 mi east of LaPorte. Yellow Pine Forest. 1700 Comment
  CAS-BOT-BC239588  Penstemon rydbergii var. oreocharis Lowell Ahart 1980-7-27 2492 Plumas About 3 miles south of Bucks Lake 2000 Comment
  CHSC11325  Pentagramma triangularis subsp. semipallida Lowell Ahart 1967-4-12 Butte Bidwell Bar. 121 Comment
  CAS-BOT-BC77136  Pentagramma triangularis subsp. semipallida Lowell Ahart 1975-3-7 s.n. Butte Along road 1/2 mile E. of the Ponderosa Dam on the South Fork of the Feather River, north of Forbestown. Comment
  CHSC101286  Pentagramma triangularis subsp. triangularis Lowell Ahart 2009-4-17 15555 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
  JEPS113226  Pentagramma triangularis subsp. triangularis Lowell Ahart 2007-5-16 13888 Butte On the west side of Jordon Hill Road, about 1/10 mile northwest of the bridge across Concow Creek, about 1 1/2 miles (air) southwest of Concow Reservoir 436 Comment
  CHSC102818  Perideridia kelloggii Lowell Ahart 2009-6-30 15972 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 Highway 32, about 10 miles northeast of Chico. 234 Comment
  CHSC102705  Perideridia lemmonii Lowell Ahart; John Dittes, Josephine Guardino 2009-7-22 16158 Plumas On both sides 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
  CHSC94399  Perideridia lemmonii Lowell Ahart 2006-8-15 13176 Butte North edge of a wet area west of a large open 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
  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-BC413703  Persicaria hydropiper Lowell Ahart 1983-9-17 4437 Butte About 1/4 mile south-east of Stirling City 1100 Comment
  CHSC55244  Persicaria hydropiperoides Lowell Ahart 1991-10-14 6715 Butte On the sides of a reservoir, Joie Osgood Ranch, about 2 miles east of Honcut. 45 Comment
  CHSC116077  Persicaria lapathifolia Lowell Ahart; John Dittes 2015-7-16 20174 Modoc North edge of Ash Creek (destroyed), southeast of the 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
  CHSC45861  Persicaria lapathifolia Lowell Ahart 1974-11-9 680 Butte On the bottom of a drained rice field, Peter Ahart Ranch, about 2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC37111  Persicaria maculosa L. Ahart 1982-10-15 3891 Butte On bottom of North Honcut Creek, ca. 2.7 mi ne of Honcut. 50 Comment
  CHSC76290  Persicaria maculosa Lowell Ahart 1999-9-21 8270 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
  CAS-BOT-BC419171  Persicaria maculosa Lowell Ahart 1982-10-6 3845 Butte Along the edges of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut 50 Comment
  SBBG119817  Persicaria punctata L. Ahart 2006-10-8 13428 Butte E side of the N Fk of the Feather River, just E of where the river flows into a pool, on the W side of Hwy 70, ca. 0.5 mi N of Cresta Power House 609 Comment
  JEPS118316  Petrorhagia dubia Lowell Ahart 2011-6-7 17388 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
  CHSC103733  Phacelia cicutaria var. cicutaria Lowell Ahart 2010-5-16 16698 Butte About 1/2 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 608 Comment
  JEPS104201  Phacelia cicutaria var. cicutaria Lowell Ahart 2003-4-10 10065 Butte On the e rim of South Table Mountain, ca 2 1/2 mi (air) n of Oroville. 332 Comment
  CHSC107329  Phacelia egena Lowell Ahart; John Dittes 2011-6-21 17521 Modoc About 230 yards west of the fence, uplands south of the meadow, Ash Creek State Wildlife Area, about 2,000 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
  JEPS108846  Phacelia egena Lowell Ahart 2006-5-5 12577 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 545 Comment
  CHSC42353  Phacelia heterophylla subsp. virgata Lowell Ahart 1987-5-9 5593 Butte On dry disturbed soil along Pulga Road, about 1/2 mile south-west of Bardees Bar along the North Fork of the Feather River, about 3 miles south-west of Pulga. 365 Comment
  CHSC115519  Phacelia mutabilis Lowell Ahart; John Dittes 2015-8-5 20474 Tehama Poor logging road, 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 Mt., 9.77 air-miles south of Lassen Peak. 1498 Comment
  CHSC43328  Phacelia mutabilis Lowell Ahart 1976-7-7 1160 Plumas Along Cold Water Creek, east of the camp, about 1/10 mile south of Arkansas Ravine, about 4 miles south of Grizzly Mountain. 1767 Comment
  CHSC43310  Phacelia tanacetifolia Lowell Ahart 1977-4-5 1261 Sutter On the south-west side of the South Butte, Sutter Buttes. 457 Comment
  CAS-BOT-BC259045  Phalaris lemmonii Lowell Ahart 1982-5-10 3431 Butte Peter Ahart Ranch, ca. 2.5 mi. N and 1/8 mi. E of Honcut 50 Comment
  CHSC44459  Phleum pratense Lowell Ahart 1988-6-23 6061 Butte Along the east side of Wyandotte Miners Ranch Road, about 1/2 mile south of Olive Highway, about 5 miles south-east of Oroville. 259 Comment
  CHSC81081  Phleum pratense Lowell Ahart 2001-8-10 9088 Sierra About 100 feet southeast 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
  JEPS128604  Phleum pratense Lowell Ahart, John Dittes 2017-7-19 21591 Nevada North part 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
  RSA715614  Phlox speciosa subsp. occidentalis L. Ahart, John Dittes 2005-6-1 11846 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
  SBBG121535  Phoradendron leucarpum subsp. tomentosum L. Ahart 2007-10-25 14505 Sierra ca. 10 yards E of Port Wine Ridge Rd and the remains of two old buildings, ca. 1.5 mi N of Scales, ca. 5 mi (air) S of La Porte 1432 Comment
  CHSC113291  Phoradendron serotinum subsp. macrophyllum Lowell Ahart 2014-5-5 19321 Butte About 40 feet north of the northeast corner of Washington Street and Spruce Street, in Gridley. 23 Comment
  CAS-BOT-BC141247  Phoradendron serotinum subsp. tomentosum Lowell Ahart 1966-3-13 s.n. Butte Near Enterprise 304 Comment
  JEPS115141  Phyla nodiflora var. nodiflora Lowell Ahart 2009-11-12 16537 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
  CHSC11375  Phyllodoce breweri Lowell Ahart 1969-8-14 Nevada Near Baltimore City. 2133 Comment
  CDA34680  Physalis lancifolia L. Ahart 2009-10-27 16500 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. Comment
  CHSC105652  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
  CHSC115306  Physocarpus capitatus Lowell Ahart 2015-5-9 20185 Sierra On the north side of the Canyon Creek Trail, trail on the north side on the Noth Fork of the Yuba River, about 300 yards west of Highway 49, about one mile west of Indian Valley. Mixed Evergreen Forest. 692 Comment
  CHSC112775  Pilularia americana Lowell Ahart; John Dittes 2013-7-24 18924 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 County Road 87, 6.8 miles (air) west of Adin, Big Valley. 1263 Comment
  CHSC10728  Pinus sabiniana Lowell Ahart 1969-7-12 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC82484  Piperia transversa Lowell Ahart; John Dittes, Josephine Guardino 2002-6-21 9743 Butte Mountainside, on the north 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
  UC1562437  Piperia unalascensis Lowell Ahart 1990-6-29 6530 Sierra s of Gold Run Creek (w of Poverty Hill (Poverty Hill Hydraulic Mine)) 1524 Comment
  UC2026873  Pistacia atlantica Lowell Ahart, Susan Bazell, Josephine Guardino, Wes Dempsey 2012-7-5 18266 Butte Cedar Grove, south parking area, Lower Bidwell Park, Chico. Comment
  SEINET10470241  Pityrogramma pallida Lowell Ahart 1984-2-3 Ahart 4494 Butte Ca. 1/4 mile south of Cox Lane, east of the pole line tower; ca. 3.5 miles NE of Honcut. Foothill Woodland; 100 m. 100 Comment
  JEPS114906  Plagiobothrys acanthocarpus Lowell Ahart, John Dittes, Josephine Guardino 2008-4-11 14701 Merced about 40 yds SE of the wire gate on the S side of Sandy Mush Road, 3.7 mi W of Hwy 99, about 8.5 mi S-SE of Merced 53 Comment
  CHSC96788  Plagiobothrys austiniae Lowell Ahart; Richard Lansdown 2007-4-25 13696 Tehama On the bottom of a very large shallow drainage, about 100 yards north of Cannon Road, about 1/2 mile west of the intersection of Cannon Road and Highway 36, about 16 miles west of Red Bluff. 270 Comment
  JEPS104459  Plagiobothrys canescens Lowell Ahart 2003-5-22 10195 Shasta Meadow south of the wash, w of the poor dirt road, ca 150 yd south of the Coleman Canal, ca 1 1/8 mi w of the barn, 4 mi (air) wsw of Darah Springs State Fish Hatchery, ca 11 mi (air) ene of Cottonwood. 259 Comment
  CHSC110913  Plagiobothrys cusickii Lowell Ahart; John Dittes 2012-7-9 18284 A Lassen Along a very small drainage, about 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UCD169603  Plagiobothrys cusickii Lowell Ahart; John Dittes 2012-7-9 18284 Butte Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. About 100 yards southeast of the tall poles. 1267 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
  SEINET10811286  Plagiobothrys fulvus Lowell Ahart, John Dittes; Josephine Guardino 2007-4-3 Ahart 13616 Tehama T25N, R1W, Section 26. Normal size plants, on dry bark rocky soil, on the east bank 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. Valley Grassland. 113 Comment
  CHSC43392  Plagiobothrys glyptocarpus Lowell Ahart 1979-5-7 1856 Butte Near Kunkle Creek, about 2 1/2 miles south-east of Paradise. 472 Comment
  SEINET263357  Plagiobothrys glyptocarpus Lowell Ahart 1989-5-28 6279 Butte S of Oregon Gulch Rd ca. 0.5 mi N of the Cemetary ca 1.25 mi W of Rocky Point ca 10 mi E and 3 mi N or Oroville 335 Comment
  CHSC103749  Plagiobothrys glyptocarpus var. glyptocarpus Lowell Ahart 2010-5-22 16715 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
  SD122572  Plagiobothrys glyptocarpus var. modestus Lowell Ahart 1984-5-7 4590 Butte 0.5 mile north of Kunkle Reservoir, along Kunkle Creek, ca. 2.0 miles south of Paradise. 600 Comment
  CHSC112430  Plagiobothrys hispidulus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18730 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
  JEPS102364  Plagiobothrys hispidulus Lowell Ahart 2001-7-21 8961 Nevada about 1 1/2 mi E of Soda Springs (on N side of dirt road, about 100 yds. NW of old sheep corral, NE of Lake Van Norden) 2063 Comment
  HSC104025  Plagiobothrys leptocladus L. Ahart, John Dittes, Josephine Guardino 2008-4-12 14676 Merced About 8.5 mi. SSE of Merced, 3.7 mi. W of Hwy. 99; ~ 0.5 mi. S of the wire gate of the south side of Sandy Mush Road. 53 Comment
  SEINET13710067  Plagiobothrys mollis Lowell William Ahart, Lowell William Ahart 2001-1 9211 Plumas Lake Almanor, 3/4 Mi. NE of Chester (T28N, R7E, sec 4, NE 1/4) 4500 Ft 1372 Comment
  JEPS117365  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2010-8-30 17077 Modoc About 25 yards east of the 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
  JEPS113129  Plagiobothrys nothofulvus Lowell Ahart, John Dittes, Josephine Guardino 2007-4-3 13615 Tehama On the east bank 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
  JEPS119703  Plagiobothrys nothofulvus Lowell Ahart 2012-5-2 17973 Butte West of the Government Pole Line, Upper Bidwell Park, about 3/4 mile east of Chico. Comment
  RSA718072  Plagiobothrys scouleri var. hispidulus L. Ahart 2006-7-16 13001 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. 1525 Comment
  CHSC46768  Plagiobothrys shastensis Lowell Ahart 1979-5-20 1877 Butte Along the edge of a large wash, Peter Ahart Ranch, about 2 1/2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  CHSC104803  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2010-6-9 16786 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
  CHSC111338  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2012-5-2 17960 Butte Bottom of a small depression, about 20 yards west of the Horseshoe Lake Dam, Upper Bidwell Park, about 1 1/4 miles east of Chico. 97 Comment
  CHSC115564  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2015-7-13 20319 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
  CHSC117424  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2016-5-31 20904 Butte About 1/8 mile east of Palermo Honcut Highway, Peter Ahart Ranch, about 2 1/4 miles north and 1/8 mile east of Honcut, about 12 miles (air) south of Oroville. 29 Comment
  CHSC40758  Plagiobothrys stipitatus var. micranthus Lowell Ahart 1985-5-5 4892 Sutter On the bottom of a vernal pool, 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
  JEPS105866  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
  JEPS113754  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2007-5-12 13779 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
  JEPS122034  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2014-6-1 19533 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. Comment
  SBBG119783  Plagiobothrys stipitatus var. micranthus L. Ahart 2004-4-29 10783 Tehama ca. 10 yards W of the Nomalaki Trail, ca. 0.5 mi NW of Bowers Crk, ca. 1.25 mi NW of USFS Rd 23N69 (Mud Flat Rd), ca. 7 air mi SW of Paskenta 571 Comment
  CHSC68472  Plagiobothrys tenellus Lowell Ahart; Barbara Castro, Dan Barth, Diane Mastalir 1997-4-6 7735 Yuba Along the south side of Dry Creek, north of the poor dirt road, about 1 mile east of Scott Forbes Road (Long Bar Road), about 17 miles northeast of Marysville. 121 Comment
  CAS-BOT-BC60823  Planodes virginica Lowell Ahart 1985-4-1 4871 a Butte Along Wyandotte Creek and Central House Road, northwest of Honcut, about 12 miles south of Oroville. 35 Comment
  CHSC91097  Plantago coronopus Lowell Ahart; Jack Lindsay 2005-5-31 11836 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
  CHSC47458  Plantago elongata Lowell Ahart 1974-3-24 337 Butte Growing on the bottom of vernal pools and wet swales, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  JEPS123891  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa About 5 1/2 miles east of Maxwell. Comment
  CHSC115396  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC90349  Plantago erecta Lowell Ahart 2005-3-11 11606 Yuba Large rock outcrop, south slope, 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. 395 Comment
  HSC102785  Plantago erecta L. Ahart 2012-4-9 17851 Butte Upper Bidwell Park, ~1.0 air mi. NE of Chico; north side of South Rim Trail, west of the power lines. 143 Comment
  SEINET10499847  Plantago erecta Lowell Ahart 1983-5-4 Ahart 3964 Sutter Along Pass Rd, ca. 2 mi e of Kellogg Rd, Sutter Buttes e of Gridley. Valley Grassland; 50 m. West of Marysville. 50 Comment
  RSA726804  Plantago lanceolata L. Ahart 2007-6-30 14231 Yuba Near a new ditch, near and east of a new road pad, about 350 yards west of the power tower, about 50 yards north of Fruitland Road, about 13 miles (air) northeast of Marysville. 29 Comment
  CHSC10719  Plantago major Lowell Ahart 1969-7-30 Placer Near Ahart Camp, French Meadows. 1524 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
  CHSC94449  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS114771  Plantago major Lowell Ahart 2008-7-23 15145 Butte On the north edge of the South Fork of the Feather River, about 10 yards east of where Sucker Creek enters the South Fork of the Feather River, below the high water line of Lake Oroville, about 1/4 mile west of the Ponderosa Dam 258 Comment
  JEPS95163  Plantago major Lowell Ahart 1997-9-11 7897 Plumas about 5 air mi ne of Beldon (on w edge of Caribou Road on w side of the North Fork of Feather River, about 1/8 mi s of Mosquito Creek); North Fork of Feather River 792 Comment
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Aug 20 2009
  JEPS98313  Plantago virginica Lowell Ahart 2000-5-13 8348 Butte 5 air miles SW of Oroville (margin of Thermalito Afterbay, S side of access road to boat ramp, W of Larkin Road, 1 1/4 mi S of Oroville Airport) 42 Comment
  CHSC63204  Platanthera leucostachys Lowell Ahart 1994-6-27 7390 Yuba Near the south-east side of Schwartz Meadow, on the east side of La Porte Road, about 4 miles north-east of Strawberry Valley. 1219 Comment
  SEINET12077271  Platanthera sparsiflora var. sparsiflora L. Ahart, Ahart, P. 1984-1 Butte Comment
  CHSC101299  Plectritis ciliosa subsp. insignis Lowell Ahart 2009-4-22 15604 -A Butte South side of Guardians Trail, south 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
  CHSC111356  Plectritis macrocera Lowell Ahart 2012-5-4 17994 Butte On wet dark soil, on the sides of a drainage, about 1/2 mile southwest 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
  CHSC114959  Plectritis macrocera Lowell Ahart 2015-3-14 19950 Butte On the south side of Beatson Hollow, south of where the small stream flows into the stream on the bottom of Beatson Hollow, about 1-1/4 miles (air) northwest of Cherokee Road, about 7miles (air) north of Oroville. 302 Comment
  SEINET10464984  Plectritis macrocera Lowell Ahart 1984-5-21 Ahart 4641 Sutter On South Butte, Sutter Buttes, west of Marysville; Foothill Woodland; 675 m. 675 Comment
  CHSC31979  Pleiacanthus spinosus L. Ahart 1974-7-9 547 Lassen Along Hwy 395, 1 mi n of jct of Hwys 395 and 70. 1524 Comment
  JEPS106272  Poa annua Lowell Ahart 2004-4-29 10784 Tehama Near a vernal pool, along the Nomalaki Trail, about 1/2 mile northwest of Bowers Creek, about 1 1/4 miles northwest of Forest Road 23N69 (Mud Flat Road), about 7 miles (air) southwest of Paskenta 571 Comment
  JEPS116032  Poa annua Lowell Ahart, Josephine Guardino, Steve Green 2009-2-20 15491 Butte Near the north side of Cedar Grove, Lower Bidwell Park, Chico 67 Comment
  CHSC105505  Poa bolanderi Lowell Ahart 2010-9-21 17198 Butte On damp humus, under 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
  CHSC61942  Poa bolanderi Lowell Ahart 1993-9-24 7258 Sierra On the west side of the small stream on the north side of Mount Fillmore, about 1/2 mile south of the dirt road from Gibsonville to Johnsville. 2072 Comment
  JEPS95297  Poa bolanderi Lowell Ahart 1994-7-7 7449 Plumas N side of Pacific Crest Trail, Bunker Hill Ridge, about 3/4 air miles SE of Pilot Peak 1828 Comment
  SEINET10822494  Poa bulbosa Lowell Ahart 1986-4-4 Ahart 5242 Butte Near North Honcut Creek, about 2 1/2 miles north and 3 miles east of Honcut, bout 12 miles south of Oroville. Abundant. Foothill Woodland. 220 ft. "Bulbous Bluegrass." Comment
  CHSC97202  Poa cusickii subsp. cusickii Lowell Ahart; Josephine Guardino 2007-7-20 14317 Plumas South of a small drainage, northeast edge of a large meadow, east of Lighting Tree Campground, east of the paved road, east side of Lake Davis. 1789 Comment
  CHSC61903  Poa cusickii subsp. epilis Lowell Ahart 1993-9-10 7216 Sierra On the north side of a ridge, on the north side of Mount Fillmore, about 1 1/2 miles south of the dirt road from Gibsonville to Johnsville. 2316 Comment
  CDA2376  Poa palustris L. Ahart, J. Dittes 2005-9-19 12371 Plumas On the east side of Taylor Lake, about 6 miles (air) southwest of Antelope Lake. Comment
  RSA755425  Poa palustris L. Ahart 2009-6-3 15815 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 air mile southwest of intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 240 Comment
  CHSC111144  Poa pratensis subsp. pratensis Lowell Ahart 2012-6-14 18188 Butte On the south side of the path, edge of the lawn, south side of CARD Community Center, Lower Bidwell Park, Chico. 62 Comment
  CHSC87984  Poa pratensis subsp. pratensis Lowell Ahart; John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11165 Plumas Around 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
  JEPS115901  Poa pratensis subsp. pratensis Lowell Ahart, John Dittes, Josephine Guardino 2009-7-21 16105 Plumas About 20 yards east of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 miles (air) southwest of Lake Almanor 1302 Comment
  CHSC50706  Poa secunda subsp. secunda Lowell Ahart 1990-4-28 6471 Butte On the banks on the south side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville. 39 Comment
  SEINET3450765  Poa secunda subsp. secunda Lowell Ahart, John Dittes 2003-5-22 10193 Shasta Cottonwood, Cottonwood, about 11 air miles east/northeast, 4 air miles west/southwest of the Darah Springs State Fish Hatchery, about 1.12 miles west of the barn, about 150 yards south of the Coleman Canal, West of the poor dirt road 250 Comment
  CAS-BOT-BC244153  Poa sierrae Lowell Ahart 1978-4-19 1486 Butte Along the trail to Feather Falls, about 0.5 mile from the trail head 650 Comment
  JEPS113263  Poa sierrae Lowell Ahart 2007-5-22 13914 Butte About 1/8 mile south of Bald Rock Dome, on the west side of 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, a 844 Comment
  CHSC41446  Pogogyne douglasii subsp. minor Lowell Ahart 1986-5-4 5253 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
  SEINET13711411  Polanisia dodecandra subsp. trachysperma Lowell William Ahart, Lowell William Ahart 1999-1 8157 Butte 12 Air Mi SW of Chico, 2 Mi SE of Ordbend, Sacramento River Comment
  RSA0045632  Polemonium micranthum Lowell A. Ahart, John Dittes 2008-6-21 14981 Modoc North of the large culvert, west of the large levee, in Big Valley, about 2.8 miles (air) north of the Headquarters at Ash Creek State Wildlife Area, about 5.4 miles (air) northeast of Bieber. 1256 Comment
  RSA726857  Polygala cornuta var. cornuta L. Ahart 2007-5-29 13921 Butte About 1/8 mile south of Bald Rock Dome, on the both sides of the Dome Trail, trail leads to the Middle Fork of the Feather River, about 1 1/4 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. 686 Comment
  JEPS107381  Polygonum arenastrum Lowell Ahart, John Dittes 2005-6-10 12060 Siskiyou In a depression, near a poor dirt road, about 80 yards north 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
  JEPS115382  Polygonum arenastrum Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16321 Tehama 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 1493 Comment
  CHSC107246  Polygonum aviculare Lowell Ahart 2011-6-3 17364 Butte Wood chipped planter area between Bidwell Mansion parking area and Gateway Science Museum, Chico. 60 Comment
  CHSC40623  Polygonum aviculare Lowell Ahart 1985-9-26 5174 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
  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
  CHSC97099  Polygonum aviculare Lowell Ahart; Josephine Guardino 2007-7-21 14375 Plumas Along a small dry drainage, about 5 yards south of the Beckwourth Taylorsville Road, about 1/4 miles (air) northwest of the most northwest part of Lake Davis. 1813 Comment
  CHSC112247  Polygonum aviculare subsp. aviculare Lowell Ahart 2013-4-29 18658 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
  JEPS104284  Polygonum bidwelliae Lowell Ahart, John Dittes, Josephine Guardino, Steve Green 2003-5-27 10217 Butte Rifle and Trap Range, NE of Horseshoe Lake, N of Parking Area E, Upper Bidwell Park, about 1 1/2 mi E of Manzanita Avenue, Chico 106 Comment
  JEPS98376  Polygonum bolanderi Lowell Ahart 2000-9-27 8694 Butte 13 air miles NE of Oroville (N side of Bean Creek Rd, 1/4 mi SE of Little Bald Rock, 1 1/4 air miles NE of Big Bald Rock, 4 air miles NE of Madrone Lake) 1066 Comment
  JEPS113406  Polygonum convolvulus Lowell Ahart 2007-5-14 13842 Yuba East and west 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 35 Comment
  RSA726959  Polygonum convolvulus L. Ahart 2007-5-14 13842 Yuba About 13 miles (air) northeast of Marysville. 36 Comment
  CAS-BOT-BC414559  Polygonum douglasii Lowell Ahart 1980-7-27 2491 Plumas About 3 miles south of Bucks Lake 2000 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
  JEPS121919  Polygonum douglasii Lowell Ahart 2014-7-10 19631 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CAS-BOT-BC414534  Polygonum douglasii Lowell Ahart 1980-9-9 2595 Nevada Near road to Prosser Creek Dam 2000 Comment
  CHSC45464  Polygonum douglasii subsp. douglasii Lowell Ahart 1975-8-17 954 Sierra On a gravel bar in Jones Valley, about 3 miles west and 2 miles south of Webber Lake. 2286 Comment
  CHSC94194  Polygonum douglasii subsp. douglasii Lowell Ahart 2006-7-11 12950 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
  JEPS107566  Polygonum douglasii subsp. douglasii Lowell Ahart 2005-7-31 12231 Nevada In a small meadow and near a small wash, between the curve and below the bridge on old Highway 80, east of Donner Pass and Donner Summit 2062 Comment
  RSA755777  Polygonum douglasii subsp. douglasii L. Ahart, John Dittes, Josephine Guardino 2009-7-21 16116 Plumas About 20 yards east of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 air miles southwest of Lake Almanor. 1303 Comment
  UC1609060  Polygonum douglasii subsp. douglasii Lowell Ahart 1993-6-20 6984 Butte about 1 air mi nw Lost Creek Reservoir Dam; Mooreville Ridge, Jackass Flat 1158 Comment
  CHSC100508  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2008-8-26 15342 Modoc On the bottom of Rose Creek, 550 feet southwest of confluence of Rose Creek and Pit River, on the northwest side of unnamed road, 2860 feet east of intersection with County Road 85a, 9.3 miles (air) north-northeast of Lookout. 1276 Comment
  JEPS115738  Polygonum lapathifolium Lowell Ahart 2009-10-12 16447 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 W 133 Comment
  SEINET10479671  Polygonum phytolaccifolium Lowell Ahart, Peter Ahart 1985-7-9 Ahart 5118 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
  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
  HSC100737  Polygonum punctatum Lowell Ahart 2009-10-12 16449 Napa Below the high water line of Lake Berryessa, along Capell Creek, E of rest area, 3/4 mi. NE of Hwy. 128 on Berryessa Knoxville Rd., 3/4 mi. SW of Capell Cove Launch Ramp, 19 (air) mi. W of Winters. 133 Comment
  JEPS108863  Polygonum punctatum 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
  JEPS108958  Polygonum punctatum Lowell Ahart 2006-9-11 13291 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
  RSA755360  Polygonum punctatum L. Ahart 2009-10-12 16449 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 air miles west of Winters. 133 Comment
  CHSC42503  Polypodium calirhiza Lowell Ahart 1987-5-9 5598 Butte Along Pulga Road, about 1/2 mile south-west of Bardees Bar along the North Fork of the Feather River, about 3 miles south-west of Pulga. 365 Comment
  CHSC61376  Polypogon australis Lowell Ahart 1993-7-23 7098 Butte Along the west side of Fall River, about 100 yards west of the bridge across Fall River, about 6 (air) miles north-east of Feather Falls. 1036 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
  CHSC92552  Polypogon interruptus Lowell Ahart 2005-12-11 12520 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
  JEPS124334  Polypogon interruptus Lowell Ahart 2015-10-16 20559 Butte About half way of and east of One Mile Pond, about 6 miles (air) east of Biggs. Comment
  RSA713014  Polypogon interruptus L. Ahart 2005-12-11 12520 Butte 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
  RSA715468  Polypogon interruptus L. Ahart 2005-5-2 11779 Butte 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. 26 Comment
  CAS-BOT-BC232531  Polypogon maritimus Lowell Ahart 1982-5-30 3473 Sutter Ca. 0.25 miles W of Myers home, Myers Ranch, Sutter Buttes 50 Comment
  CHSC39324  Polypogon maritimus Lowell Ahart 1983-6-26 4158 Butte Along Ponderosa Way, about 2 1/2 miles east of where Ponderosa Way crosses the East Fork of Canyon Creek, about 15 1/2 miles north-east of Oroville. Note: the sign gives Big Ridge Road instead of Ponderosa Way. 600 Comment
  JEPS127227  Polypogon maritimus Lowell Ahart 2016-5-30 20886 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 1/8 miles east of Honcut, about 12 miles (air) southeast of Oroville. Comment
  CHSC47636  Polypogon monspeliensis Lowell Ahart 1983-5-4 3957 Sutter Along the edge of Pass Road, about 4 miles west of Kellogg Road, Sutter Buttes. 45 Comment
  CHSC69527  Polypogon monspeliensis Lowell Ahart 1997-9-11 7902 Plumas On the west edge of Caribou Road, on the west side of the North Fork of the Feather River, about 1/8 mile south of Mosquito Creek, about 5 miles (air) northeast of Belden. 792 Comment
  RSA726565  Polypogon monspeliensis L. Ahart 2007-5-14 13882 Yuba About 13 miles (air) northeast of Marysville. 36 Comment
  SEINET10661618  Polypogon monspeliensis Lowell Ahart, John Dittes 2005-6-2 Ahart 11967 Lassen T23N, R17E, southwest 1/4 Section 10. 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
  CAS-BOT-BC237454  Polypogon viridis Lowell Ahart 1987-5-27 5700 Butte Along the N Fork of the Feather River, near the Poe Power House, about 2 miles SE of Jarbo Gap 271 Comment
  RSA726855  Polypogon viridis L. Ahart 2007-6-3 13977 Butte On the west side of Jordan Hill Road, about 1.5 miles northwest of Concow Creek, about 1.5 miles west of Concow Reservoir. 358 Comment
  SEINET10470609  Polystichum imbricans Lowell Ahart, Peter Ahart 1983-6-26 Ahart 4122 Butte T20N R8E ne sec 9. Along Ponderosa Way (Big Ridge Rd), ca. 2 mi se of the jct with Oroville-Quincy Hwy, ca. 15 mi ne of Oroville. Foothill Woodland; 500 m. 500 Comment
  CHSC116676  Polystichum imbricans subsp. curtum Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20721 Colusa On the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of thee large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  CHSC87204  Polystichum imbricans subsp. curtum Lowell Ahart 2004-4-10 10734 Tehama Along Bowers Creek, about 30 yards west of the Nomalaki Trail, about 3/4 mile northwest of Forest Road 23N69 (Mud Flat Road), about 6 1/2 miles (air) southwest of Paskenta. 522 Comment
  JEPS116121  Polystichum imbricans subsp. curtum Lowell Ahart 2009-6-30 15971 Butte Around large boulders 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 Highway 32, about 10 miles northeast of Chico 234 Comment
  JEPS87565  Polystichum imbricans subsp. curtum Lowell Ahart 1994-10-9 7561 Butte ca. 8 1/2 air mi n and 1 1/2 mi e of Feather Falls (n side of poor rd from Milsap Bar to Mountain Spring House, ca. 1 mi w of Mountain Spring House and the paved rd.) 1158 Comment
  CHSC94996  Polystichum imbricans subsp. imbricans Lowell Ahart 2006-10-23 13470 A Plumas By large rocks on the west mountain side of Slate Creek (there is a large gravel flat caused by the dam), about 50 yards north of where the road ends, about 100 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
  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
  CHSC46514  Populus balsamifera subsp. trichocarpa Lowell Ahart 1981-6-23 2879 Sierra Wallace Creek, on the north side of the dirt (county) road, about 4 miles north-east of La Porte. 1645 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-BC267176  Potamogeton foliosus Lowell Ahart 1986-5-24 5300 Sutter In the pond, about 0.25 mile SE of the Dean Cabin, Dean Ranch, about 3.5 miles NW of Sutter, Sutter Buttes 198 Comment
  CDA32028  Potamogeton natans L. Ahart, J. Guardino 2009-9-6 16361 Tehama North of the enclosure, shallow water in Gurnsey Creek, meadow, about 3/4 mile southwest of the intersection of Highway 36 and Paynes Creek Road, about 6 1/2 miles (air) southeast of Mineral. Comment
  CHSC102634  Potamogeton natans Lowell Ahart; Josephine Guardino 2009-9-6 16361 Tehama North of the enclosure, meadow, shallow water in Gurnsey Creek, meadow, about 3/4 mile southwest of the intersection of Highway 36 and Paynes Creek Road, about 6 1/2 miles (air) southeast of Mineral. 1478 Comment
  HSC102787  Potamogeton natans L. Ahart, Josephine Guardino 2009-9-6 16361 Tehama Gurnsey Creek; about 6.5 air miles SE of Mineral, ~0.75 mi. SW of the intersection of Hwy. 36 and Paynes Creek Road, 1479 Comment
  CAS-BOT-BC453738  Potamogeton natans Lowell Ahart 1981-9-21 3198 Butte Along French Creek 1300 Comment
  JEPS105839  Potentilla breweri Lowell Ahart, John Dittes, Josephine Guardino, Robert Schlising 2004-7-3 11167 Plumas Around 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
  CHSC75815  Potentilla drummondii Lowell Ahart; Vernon H. Oswald 1999-7-26 8111 Nevada In a meadow, about 50 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. 2316 Comment
  CHSC66529  Potentilla glandulosa subsp. ashlandica Lowell Ahart 1996-7-25 7692 Sierra Along the dirt road, old Henness Pass Road, French Meadow, about 2 miles west of Webber Lake. 1950 Comment
  CHSC106097  Potentilla millefolia Lowell Ahart; John Dittes 2010-7-30 16938 Siskiyou West of the pipe crossing the Shasta River, about 10 yards south 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
  JEPS114354  Potentilla norvegica Lowell Ahart 2008-9-10 15395 Plumas Below the high water line of Little Grass Valley Reservoir, north of the South Fork of the Feather River, southwest of the horse camp, about 4 1/2 miles (air) north of La Porte 1537 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
  JEPS113532  Potentilla rivalis Lowell Ahart, John Dittes, Josephine Guardino 2007-6-8 14034 Plumas Strand of Lake Davis, southeast of the end of the road, north end of Lake Davis 1763 Comment
  CHSC94098  Poteridium annuum Lowell Ahart 2006-7-11 12956 Tehama On the north edge of the dirt 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
  JEPS110470  Prosopis glandulosa var. torreyana Lowell Ahart, Mike G. Womack 2006-8-29 13240 Butte Near pump 24, about 1/4 mile southwest of Parking Lot 9, about 1 1/2 miles east of Pennington Road, Gray Lodge Wildlife Area (Gray Lodge Waterfowl Management Area) 21 Comment
  CHSC99269  Prunus subcordata Lowell Ahart; John Dittes 2008-6-19 14843 Shasta About 5 yards east of the Pit River, near the bridge, about 150 yards northwest 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
  JEPS117363  Prunus subcordata Lowell Ahart, John Dittes 2010-8-30 17062 Modoc Around a large rock, near the homestead, about 100 yards east of the fence, 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
  CHSC113980  Pseudognaphalium beneolens Lowell Ahart 2014-11-17 19909 Butte Just below the high water line of Lake Oroville, about 50 yards west of the Enterprise Boat Launch Area, parking area, about 11 miles (air) northeast of Oroville. 253 Comment
  JEPS124134  Pseudognaphalium beneolens Lowell Ahart 2015-11-7 20624 Butte About 1/8 mile south of the end of Alternate 40, strand of Lake Oroville, Dark Canyon, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. Comment
  CHSC113053  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 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
  CHSC81756  Pseudognaphalium luteoalbum Lowell Ahart 2001-10-10 9339 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
  CHSC94635  Pseudognaphalium luteoalbum Lowell Ahart 2006-10-8 13404 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
  JEPS124148  Pseudognaphalium luteoalbum Lowell Ahart 2015-11-7 20629 Butte About 1/8 mile southwest of the parking area at the end of Old Highway Alternate 40, strand of Lake Oroville, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. Comment
  CAS-BOT-BC357339  Pseudognaphalium microcephalum Lowell Ahart 1980-10-8 2682 Nevada About 1 mile west of Weaver Lake 1700 Comment
  CAS-BOT-BC357400  Pseudognaphalium microcephalum Lowell Ahart 1983-10-27 4471 Sierra On the north side of Milton Res., near Jackson Meadow Res. 1800 Comment
  CHSC113055  Pseudognaphalium stramineum Lowell Ahart 2013-10-1 19070 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
  CHSC50647  Pseudognaphalium stramineum Lowell Ahart 1990-6-16 6522 Butte On the east side of 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
  CHSC41999  Pseudognaphalium thermale Lowell Ahart 1975-9-4 973 Butte Along the South Fork of the Feather River, about 1/2 mile north of the Golden Trout Crossing, about 15 miles north of Feather Falls. 762 Comment
  JEPS115337  Pseudognaphalium thermale Lowell Ahart, John Dittes 2009-9-7 16377 Plumas Below the high water line of Lake Almanor, about 2000 feet northwest of Lake Almanor Dam 1591 Comment
  CHSC110384  Pseudostellaria jamesiana Lowell Ahart 2012-9-5 18434 Plumas About 200 yards east 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 LaPorte. 1889 Comment
  CHSC99829  Pseudostellaria jamesiana Lowell Ahart 2008-7-16 15100 Plumas Dry open area west of a small meadow (swamp), north of a small deep stream, about 130 yards north of the paved road, about 1/4 miles 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
  SBBG128117  Pseudotsuga menziesii L. Ahart, J. Dittes 2009-7-13 16058 Plumas E side of Forest Service Rd 27N98, headwater of Clear Crk, ca. 2 mi N of Butt Valley Reservoir Dam, ca. 3 mi SW of Lake Almanor Reseroir Dam 1476 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
  JEPS127273  Psilocarphus brevissimus var. brevissimus Lowell Ahart, John Dittes 2016-7-13 21110 Lassen 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
  JEPS87519  Psilocarphus brevissimus var. multiflorus Lowell Ahart 1993-5-13 6937 Butte about 1 3/4 mi n and 1/2 mi e Honcut (large vernal pool e of deep wash, about 12 mi s of Oroville); Peter Ahart Ranch 30 Comment
  CHSC84106  Psilocarphus oregonus Lowell Ahart; John Dittes 2003-5-12 10137 Shasta In a vernal pool, 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
  UCD135289  Psilocarphus oregonus L. Ahart 1978-5-12 1715 Butte Peter Ahart Ranch, Honcut. 50 Comment
  JEPS87528  Psilocarphus tenellus Lowell Ahart 1993-7-6 7049 Butte about 1/4 mi w Lost Creek Reservoir (s side of dirt rd) 1036 Comment
  CAS-BOT-BC361916  Psilocarphus tenellus Lowell Ahart 1980-4-30 2140 Butte Along Hurleton-Swedes Flat Road 500 Comment
  CHSC46966  Psilocarphus tenellus var. globiferus Lowell Ahart 1979-5-11 1867 Butte In a grain field, Peter Ahart Ranch, about 2 miles north and 3/4 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  SBBG119785  Psilocarphus tenellus var. tenellus L. Ahart 2004-4-29 10787 Tehama Nomalaki Trail, ca. 0.5 mi NW of Bowers Crk, ca. 1.25 mi NW of Forest Rd 23N69 (Mud Flat Rd), ca. 7 air mi SW of Paskenta 571 Comment
  CAS-BOT-BC72530  Pteridium aquilinum Lowell Ahart 1979-6-3 s.n. Yuba 1 mile S of Challenge 700 Comment
  CHSC105259  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
  CHSC54562  Pterospora andromedea Lowell Ahart 1991-7-29 6699 Sierra On the west side of Negro Creek, west of Burlington, about 1 miles north-east of Harris Meadow, about 1-1/4 miles north-east of Granite Mountain. 1828 Comment
  CHSC63138  Pterospora andromedea Lowell Ahart 1994-6-27 7396 Yuba In forest on the north side of Schwartz Meadow, on the east side of La Porte Road, about 4 miles north-east of Strawberry Valley. 1219 Comment
  JEPS118407  Pterospora andromedea Lowell Ahart 2011-9-23 17715 Sierra Forest floor, west of a small stream that flows into Pass Creek, about 100 yards north of Pass Creek, about 300 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
  CHSC103729  Pterostegia drymarioides Lowell Ahart 2010-5-16 16697 Butte About 1/2 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 364 Comment
  JEPS107956  Puccinellia distans Lowell Ahart, John Dittes 2005-6-9 12002 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
  CHSC45518  Pyrola aphylla Lowell Ahart 1976-7-7 1169 Plumas Near the dirt road, about 2 miles south-west of Cold Water Creek, about 6 miles south of Grizzly Mountain. 1524 Comment
  CHSC78245  Pyrola aphylla Lowell Ahart 2000-7-11 8573 Butte On the north side of a dirt road, about 100 yards north of Lumpkin Ridge Road, upper west branch of Know-nothing Creek, about 1 mile southwest of the intersection of Lumpkin Ridge Road, road to Fall River, and the County Road, about 4 miles (air) northeast of Feather Falls. 1219 Comment
  CAS-BOT-BC460580  Pyrola aphylla Lowell Ahart 1988-6-15 6043 Butte NW of the intersection of Black Bart Road and Forbestown Road, about 1 mi. W of Robinson Mill Road 670 Comment
  CAS-BOT-BC462775  Pyrola dentata Lowell Ahart 1969-7-30 s.n. Placer Ahart Camp, French Meadows 1524 Comment
  UC1609015  Pyrola picta var. picta Lowell Ahart 1993-9-8 7159 Butte North-west 1/4 Section 3. about 1 mile east of Snow Mountain 2072 Comment
  CDA21862  Quercus chrysolepis var. chrysolepis L. Ahart 1999-6-12 8085 Butte South branch of Coal Canyon, 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. Comment
  UC2026888  Quercus coccinea Lowell Ahart, Susan Bazell, Josephine Guardino, Wes Dempsey 2012-6-21 18224 Butte North side of paved park road, north of South Park Drive, east of Caper Acres Playground, about 150 yards west of the Freeway, Lower Bidwell Park, Chico. Comment
  JEPS113133  Quercus douglasii Lowell Ahart 2007-3-28 13600 Butte West of North Honcut Creek, about 2 1/2 miles north and 2 2/3 miles east of Honcut, about 12 miles southeast of Oroville 51 Comment
  CHSC63255  Quercus durata var. durata Lowell Ahart 1994-6-5 7306 Yuba On the north side of Costa Creek, on the north side of Forbestown Road, about 3 (air) miles east of Forbestown. 853 Comment
  CHSC97714  Quercus kelloggii Lowell Ahart 2007-10-25 14503 Sierra West side of a 20 acre meadow, about 40 yards east of Port Wine Ridge Road and the remains of two old buildings, about 1 1/2 miles north of Scales, about 5 miles (air) south of La Porte. 1432 Comment
  JEPS107413  Quercus wislizeni var. wislizeni Lowell Ahart 2005-3-11 11621 Yuba On E side of the poor dirt road, ca. 1/2 mi W of Marysville Rd, ca. 1/4 mi N of Parking Area 3, Daugherty Hill Wildlife Area, Donovan Hill Management Area, ca. 1/4 mi N of Loma Rica Rd, ca. 5 mi (air) NE of Loma Rica 344 Comment
  CHSC31877  Ranunculus aquatilis var. hispidulus L. Ahart 1974-6-3 468 Butte In wash. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC25488  Ranunculus arvensis L. Ahart 1977-4-28 Butte In our grain field. Peter Ahart Ranch. 50 Comment
  CAS-BOT-BC378988  Ranunculus arvensis Lowell Ahart 1977-4-28 s.n. Butte Honcut, Peter Ahart Ranch 50 Comment
  CHSC112764  Ranunculus cymbalaria Lowell Ahart; John Dittes 2013-7-24 18938 Modoc South margin of Ash Creek Canal, 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. 1268 Comment
  RSA794995  Ranunculus flammula L. Ahart, Josephine Guardino 2009-9-6 16359 Tehama East of the enclosure, on the east side of Gurnsey Creek, meadow about 0.75 miles southwest of the intersection of Highway 36 and Paynes Creek Road, about 6.5 air miles southeast of Mineral. 1479 Comment
  CHSC102661  Ranunculus flammula var. ovalis Lowell Ahart; Josephine Guardino 2009-9-6 16359 Tehama On damp gray soil, east of the enclosure, on the side of Gurnsey Creek, meadow, about 3/4 mile southwest of the intersection of Highway 36 and Paynes Creek Road, About 6 1/2 miles (air) southeast of Mineral. 1478 Comment
  JEPS98951  Ranunculus flammula var. ovalis Lowell Ahart 2001-8-10 9107 Sierra About 200 yards west of the dam, diversion dam across the Little Truckee River (water flows to Sierra Valley), about 150 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
  RSA0062308  Ranunculus occidentalis var. occidentalis Lowell A. Ahart, John Dittes 2011-6-20 17479 Lassen About 15 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
  SBBG119943  Ranunculus orthorhynchus var. orthorhynchus L. Ahart 2006-7-19 13029 Tehama S of an open dry flat, ca. 100 yards W of the dirt rd, E of Colby Mtn, ca. 5 mi NE of Butte Meadows 1525 Comment
  JEPS114346  Raphanus raphanistrum Lowell Ahart, John Dittes, Josephine Guardino 2008-4-13 14695 Merced Along the fence, about 50 yards west 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
  CDA35703  Rhamnus californica subsp. californica L. Ahart 2002-6-2 9679 Butte South of the intersection of Black Bart Road and Forbestown Road, about 3 miles (air) southwest of Forbestown. Comment
  CAS-BOT-BC59881  Rhamnus ilicifolia Lowell Ahart 1989-5-29 6303 Butte Along Robinson Mill Road, about 1.5 mi. s. of Forbestown Road. 670 Comment
  RSA754543  Rhamnus tomentella subsp. tomentella L. Ahart 2009-5-23 15724 Butte S side of Ten Mile House Road, Upper Bidwell Park, about 1/2 air mile SW of the intersection of Highway 32 and Ten Mile House Road, about 10 miles NE of Chico. 311 Comment
  CHSC61313  Rhododendron neoglandulosum Lowell Ahart 1993-7-29 7132 Butte Bog on the northside of the dirt road to big Kimshew Creek, about 1-1/2 miles south-east of Bald Mountain, north-east of Stirling City. 1493 Comment
  CHSC96970  Rhynchospora capitellata Lowell Ahart; Lawrence Janeway, Linnea Hanson 2007-7-10 14278 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
  RSA0024861  Ribes cereum var. cereum L. Ahart, John Dittes 2005-9-20 12438 Plumas North of Mud Lake, about 1/2 mile northeast of Eisenheimer Peak, about 3/4 mile south of Wilcox Valley. 2042 Comment
  CAS-BOT-BC212673  Ribes nevadense Lowell Ahart 1982-5-8 3420 Butte Forbestown Resevoir 700 Comment
  CHSC10767  Ribes nevadense Lowell Ahart 1969-5-18 Plumas Slate Creek, 10 miles south of La Porte. 914 Comment
  CHSC104012  Ribes roezlii var. roezlii Lowell Ahart 2010-6-12 16790 Butte On the south side of Ten Mile House Road, about 1/4 mile (air) west of Highway 32, about 9 miles (air) northeast of Chico. 376 Comment
  CHSC109063  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. 392 Comment
  CHSC87202  Rigiopappus leptocladus Lowell Ahart; John Dittes, Josephine Guardino 2004-4-15 10743 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
  CHSC91347  Rigiopappus leptocladus Lowell Ahart; John Dittes 2005-6-9 12045 Siskiyou 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
  JEPS114374  Rorippa Lowell Ahart, John Dittes 2008-8-25 15274 Modoc On the banks of the Pit River, about 1/8 mile east of County Road 91, about 3.8 miles (air) north-northeast of Lookout 1273 Comment
  CAS-BOT-BC74454  Rorippa curvisiliqua Lowell Ahart 1974-5-5 s.n. Butte Peter Ahart Ranch, Honcut. 150 Comment
  JEPS119648  Rorippa curvisiliqua Lowell Ahart, John Dittes 2012-7-9 18292 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC74457  Rorippa curvisiliqua Lowell Ahart 1979-9-8 s.n. Butte California Rice Experiment Station. 33 Comment
  CHSC94178  Rorippa curvisiliqua var. occidentalis Lowell Ahart 2006-6-18 12795 Butte Peter Ahart Ranch, about 2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. In a rice field. 31 Comment
  JEPS115008  Rorippa curvisiliqua var. occidentalis Lowell Ahart 2007-11-8 14588 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
  JEPS120612  Rorippa curvisiliqua var. occidentalis Lowell Ahart 2013-11-13 19231 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. Comment
  CHSC103005  Rorippa curvisiliqua var. orientalis Lowell Ahart 2009-10-12 16434 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
  CHSC94560  Rorippa curvisiliqua var. orientalis Lowell Ahart 2006-9-11 13279 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
  JEPS114450  Rorippa curvisiliqua var. orientalis Lowell Ahart, John Dittes 2008-6-21 15000 Modoc In the drying pond, north of the large culvert, east of the large levee, in Big Valley, about 2.8 miles (air) north of the Headquarters at Ash Creek State Wildlife Area, about 5.4 miles (air) northeast of Bieber 1255 Comment
  CDA32007  Rorippa nasturtium-aquaticum L. Ahart 2009-6-3 15819 Butte 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 air mile southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. Comment
  CHSC94165  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
  CHSC82396  Rosa californica Lowell Ahart 2002-5-15 9661 Butte On the south side of Central House Road, about 80 yards east of the bridge across Whyman Ravine, about 1/4 mile east of Highway 70, about 12 miles southwest of Oroville. 27 Comment
  CHSC93661  Rosa californica 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
  CDA31975  Rosa gymnocarpa L. Ahart, J. Dittes 2009-7-28 16195 Plumas Near seeps, slope northwest of mine, west (above) Forest Service Road 27N28Y, 2.9 miles (air) northwest of Butt Valley Reservoir Dam. Comment
  CHSC94167  Rosa gymnocarpa Lowell Ahart 2006-6-21 12841 Sierra On the east side of the road, about 3 1/2 miles (by road) northwest of Forest. 1421 Comment
  JEPS102353  Rosa gymnocarpa Lowell Ahart 2001-7-19 8944 Plumas about 2 1/2 air miles SE of Pilot Peak (Hopkins Creek, about 100 yds. NW of East Branch, about 1/2 air miles S of Turkey Town) 1828 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
  JEPS107938  Rosa pisocarpa subsp. ahartii Lowell Ahart 2005-7-23 12190 Nevada Meadow, under the power lines, about 100 yards west of the paved road, southwest of Lake Spaulding, about 1/2 mile north of Highway 20 1572 Comment
  CHSC100472  Rosmarinus officinalis Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15436 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
  CHSC42056  Rotala ramosior Lowell Ahart 1986-11-9 5441 Butte On the bottom of a pond, 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
  CHSC43233  Rotala ramosior Lowell Ahart 1987-9-4 5879 Butte On the bottom of a drying pond, on the bottom of North Honcut Creek, about 2 miles north and 3 mile seast of Honcut, about 12 miles south-east of Oroville. 67 Comment
  CHSC84312  Rubus armeniacus Lowell Ahart; John Dittes 2003-6-11 10256 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
  CAS-BOT-BC147166  Rubus laciniatus Lowell Ahart 1980-6-19 2398 Yuba 3 miles south-east of Challenge 800 Comment
  CHSC97120  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
  SEINET10970329  Rubus leucodermis Lowell Ahart, Peter Ahart 1985-7-9 Ahart 5120 Butte About 1/4 mile south of the bridge across Fall River, east of Fall River, about 1/2 mile west of Lumpkin Ridge Road, about 2 1/2 miles north-east of Camp 18, abut 9 miles northeast of Feather Falls. Comment
  JEPS122191  Rubus ursinus Lowell Ahart 2014-4-16 19365 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
  CHSC106088  Rumex acetosella Lowell Ahart; John Dittes 2010-7-31 17001 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
  RSA754878  Rumex acetosella L. Ahart 2009-6-19 15940 Butte Open area north of pond and table, about 50 yards south of Ten Mile House Road, Upper Bidwell Park, about 3/4 air miles southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles NE of Chico. 232 Comment
  UC1562377  Rumex acetosella Lowell Ahart 1990-5-25 6497 Butte 1.25 mi nw Enterprise Bridge (across Lake Oroville) (0.25 mi w of Enterprise Boat Launch Area, just below the high water line of Lake Oroville); Lake Oroville 274 Comment
  JEPS119634  Rumex conglomeratus Lowell Ahart 2012-6-14 18184 Butte On the north side of Big Chico Creek, near the intersection of Arbutus and Vallombrosa Avenue, Lower Bidwell Park, Chico. Comment
  CHSC103146  Rumex dentatus Lowell Ahart 2009-7-4 15998 Butte On the west side of the gravel road, about 100 yards south of parking lot 3, Gray Lodge Waterflowl Management Area, about 6 miles (air) southwest of Gridley. 21 Comment
  JEPS115724  Rumex dentatus Lowell Ahart 2009-7-4 15998 Butte On the west side of the gravel road, about 100 yards south of parking lot 3, Gray Lodge Waterflowl Management Area, about 6 miles (air) southwest of Gridley 21 Comment
  JEPS115686  Rumex maritimus Lowell Ahart 2009-10-27 16493 Napa Below the high water line of Lake Berryessa, about 400 yards east of Eticuera Creek, about 300 yards east of Eticuera Parking Area at the northeast end of the causeway, on the south side of Berryessa Knoxville Road, on the bottom of an unnamed creek, abou 130 Comment
  CAS-BOT-BC433870  Rumex salicifolius Lowell Ahart 1981-7-3 2905 Sutter Near the old homestead and near the rock pile, on the south side of South Butte, Sutter Buttes. 350 Comment
  CHSC80961  Rumex salicifolius var. triangulivalvis Lowell Ahart 2001-8-10 9087 Sierra About 100 feet southeast 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
  SD122531  Rumex triangulivalvis var. oreolapathum Lowell Ahart 1984-6-8 4675 Butte Along the dirt road near the water tower, above the generator, ca. 1 mi E of Ponderosa Dam, ca. 2 mi N of Forbestown 145 Comment
  SEINET10479813  Rumex triangulivalvis var. oreolapathum Lowell Ahart 1985-7-11 Ahart 5121 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
  CHSC45579  Sagina apetala Lowell Ahart 1980-5-4 2215 Butte About 150 feet south-west of the intersection of Forbestown Road and Hurleton Swedes Flat Road, about 1/2 mile south-east of Hurleton. 548 Comment
  JEPS118328  Sagina apetala Lowell Ahart 2011-4-28 17331 Butte Along trail in the Disc Golf Area, about 130 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 398 Comment
  CHSC50030  Sagina decumbens subsp. occidentalis Lowell Ahart 1990-4-15 6459 Butte Below 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. 289 Comment
  JEPS122222  Sagina decumbens subsp. occidentalis Lowell Ahart 2014-4-26 19410 Butte On the south side of Butte City Highway (Highway 162), collected from the railroad to the east about 200 yards, east of the Rice Experiment Station. Comment
  CHSC115786  Sagina saginoides Lowell Ahart; John Dittes 2015-8-6 20492 Tehama 30 yards 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), 1.2 air-miles southeast of Doe Mt., 10.41 air-miles south of Lassen Peak. 1498 Comment
  CHSC40359  Sagina saginoides Lowell Ahart 1985-7-11 5131 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 northeast of La Porte. 1584 Comment
  JEPS119661  Sagittaria latifolia var. latifolia Lowell Ahart, John Dittes 2012-7-11 18336 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
  CHSC108820  Salix babylonica Lowell Ahart; John Dittes, Josephine Guardino 2012-4-6 17804 Butte On the north side of Big Chico Creek, Lost Park in Bidwell Park, city of Chico. 60 Comment
  SBBG126099  Salix exigua L. Ahart 2012-6-2 18139 Butte small stream, W of a poor dirt rd, ca 40 yards N of Truex Rd, W of intersection of Truex Rd and Trevor Rd, ca 1/8 mi NW of the W Branch Bridge across Lake Oroville 286 Comment
  CHSC115836  Salix exigua var. exigua Lowell Ahart; John Dittes 2015-8-6 20512 Tehama East of the camping area, west side of 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
  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
  JEPS119590  Salix exigua var. hindsiana Lowell Ahart 2012-4-17 17883 Butte About 200 yards southeast of where the road turns north, about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 5 miles (air) southwest of Oroville. Comment
  JEPS117450  Salix laevigata Lowell Ahart 2010-9-15 17187 Sierra On the northwest edge 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
  CAS-BOT-BC125173  Salix lasiandra var. lasiandra Lowell Ahart 1977-4-5 913 Butte South Butte, Sutter Buttes 200 Comment
  CDA38779  Salix lasiandra var. lasiandra L. Ahart, Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17913 Butte On the north side of the path, near table 14, on the north side of Centennial Avenue, Lower Bidwell Park, Chico. Comment
  CHSC109074  Salix lasiandra var. lasiandra Lowell Ahart; Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 18913 Butte On the north side of the path, near Table 14, on the north side of Centennial Avenue, Lower Bidwell Park, Chico. 80 Comment
  CHSC113618  Salix lasiandra var. lasiandra Lowell Ahart 2014-8-31 19811 Plumas South of an unnamed drainage, on the west side of Black Rock Creek, about 200 yards southwest of the foot bridge across Black Rock Creek, about 200 yards southwest of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. 1536 Comment
  CHSC117635  Salix lasiolepis Lowell Ahart; John Dittes 2016-8-25 21303 Tehama Along the west side of the Sacramento River, Anderson River Park, 0.7 mile (air) upstream from Sillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderon. Undesignated section of San Buenaventura Land Grant. 117 Comment
  JEPS119616  Salix lasiolepis Lowell Ahart 2012-4-9 17830 -A Butte West of South Rim Trail, south part of Upper Bidwell Park, about 2 miles (air) northeast of Chico. Comment
  JEPS119969  Salix lasiolepis Lowell Ahart 2012-2-28 17757 Yuba About 1/2 mile east of Ramirez Road, about 13 miles northeast of Marysville. Comment
  RSA0058978  Salix lasiolepis Lowell Ahart 2012-4-9 17831 A Butte East of the cement dam in Big Chico Creek, west of South Rim Trail, south part of Upper Bidwell Park, about 2 miles (air) northeast of Chico. 110 Comment
  CHSC42542  Salix lucida subsp. lasiandra Lowell Ahart 1987-5-22 5684 Butte About 1/8 mile north-east of Camp 18, about 6 1/2 miles north-east of Feather Falls. 1219 Comment
  CHSC63170  Salix lucida subsp. lasiandra Lowell Ahart 1994-7-1 7440 Sierra On the north side of Henness Pass Road, at Keystone Gap, east of Keystone Mountain, about 1 1/2 miles north-east of Middlewaters, about 11 miles (air) north-east of Alleghany. 1889 Comment
  CHSC92188  Salix lucida subsp. lasiandra Lowell Ahart; John Dittes 2005-9-20 12453 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
  CHSC42544  Salix melanopsis Lowell Ahart 1987-5-6 5539 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 274 Comment
  CHSC115799  Salix orestera Lowell Ahart; John Deurloo 2015-8-25 20532 Plumas On the bottom of the Bean Hill Mine, hydraulic mine in serpentine, 2.8 miles (air) east-northeast of Silver Lake, 3.3 miles (air)south Twain, 7.8 miles (air) west-northwest of Quincy. 1367 Comment
  SBBG121614  Salsola soda L. Ahart 2006-9-26 13348 Colusa N side of Maxwell Rd, ca. 3 mi W of Colusa Princeton Rd, between ditch and Delevan Nat Wildlife Refuge 24 Comment
  CHSC76096  Salsola tragus Lowell Ahart; Vernon H. Oswald 1999-9-13 8205 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
  SBBG128587  Salsola tragus L. Ahart, J. Dittes 2008-8-21 15235 Merced slopes of mounds, ca. 0.5 mi S 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
  CHSC45882  Sanicula crassicaulis Lowell Ahart 1981-4-24 2783 Butte Along the sides of North Honcut Creek, Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut. 45 Comment
  CHSC82482  Sanicula graveolens Lowell Ahart; John Dittes, Josephine Guardino 2002-6-21 9733 Butte On the sides 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
  JEPS87745  Sanicula graveolens Lowell Ahart 1994-6-15 7340 Plumas about 1 air mi w Little Grass Valley Reservoir (near intersection of Lumpkin Ridge Road and the road to Tamarack Flat, about 200 yards e of a logging road); w of Little Grass Valley Reservoir 1767 Comment
  JEPS113171  Saponaria officinalis Lowell Ahart 2007-5-29 13933 Butte On the east side of Bald Rock Dome, gravel bar along 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 (a 608 Comment
  JEPS123840  Saponaria officinalis Lowell Ahart, John Dittes 2015-7-14 20323 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  RSA769185  Schoenoplectus maritimus L. Ahart 2009-10-12 16460 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 air miles west of Winters. 133 Comment
  CHSC24430  Schoenoplectus mucronatus Lowell Ahart 1976-9-18 Butte Rice fields on the Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC111651  Schoenoplectus mucronatus Lowell Ahart 1976-9-18 s.n. Butte Peter Ahart Ranch, Honcut. 150 Comment
  CHSC105672  Schoenoplectus subterminalis Lowell Ahart 2010-10-21 17312 Plumas East side of Fowler Lake, about 3/8 mile south of the dirt road, about 2 miles (air) north of where Black Rock Creek flows into Little Grass Valley Reservoir, about 6 miles (air) north-northwest of La Porte. 1662 Comment
  CAS-BOT-BC111833  Schoenoplectus tabernaemontani Lowell Ahart 1987-9-24 5898 Butte Along the North Fork of the Feather River, near the Poe Power House, 271 Comment
  CHSC78321  Scirpus congdonii Lowell Ahart 2000-6-29 8547 Butte By the road culvert, on the northwest side of 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
  CHSC102648  Scirpus diffusus Lowell Ahart; John Dittes, Josephine Guardino 2009-8-27 16337 Tehama Along and in a small seep (spring), west side of pond, 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 between Sec 23 SE1/4 and Sec 24 SW1/4. 1493 Comment
  JEPS121208  Scirpus microcarpus Lowell Ahart, John Dittes 2013-7-24 18944 Modoc South margin of Ash Creek Canal, S of Ash Creek, Ash Creek State Wildlife Area, 0.79 air miles S of County Road 87, 1.73 air miles W of Adin, Big Valley. Comment
  JEPS107421  Scirpus nevadensis Lowell Ahart, John Dittes 2005-6-9 12025 Siskiyou Meadow area along a small drainage, on the west side of a poor rock fence, about 150 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
  JEPS104047  Scirpus setaceus Lowell Ahart 2003-6-30 10337 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
  SEINET10971844  Scirpus setaceus Lowell Ahart 1984-6-8 Ahart 4685 Butte Along the edge of the dirt road that goes to Lumpkin Ridge Rd, ca. 6 mi NE of Ponderosa Dam, ca. 4 mi SE of Feather Falls; Yellow Pine Forest; 550 m. 550 Comment
  JEPS104073  Scirpus tabernaemontani Lowell Ahart 2003-9-17 10604 Tehama On the edge of a gravel bar on the south side of Deer Creek, ca 400 yd e of Highway 99, ca 5 mi (air) se of Los Molinos. 60 Comment
  JEPS104220  Scribneria bolanderi Lowell Ahart 2003-5-18 10180 Butte Wash, Peter Ahart Ranch, ca 2 mi n and 2 mi e of Honcut, ca 12 mi se of Oroville. 48 Comment
  CHSC31903  Scutellaria siphocampyloides L. Ahart 1977-5-20 1387 Butte Peter Ahart Ranch, Honcut. On banks of North Honcut Creek. 50 Comment
  JEPS102319  Scutellaria siphocampyloides Lowell Ahart 2001-6-8 8777 Tehama 9 mi W of Paskenta (W side of road M2) 792 Comment
  CHSC84128  Sedella pumila Lowell Ahart 2003-4-10 10082 Butte Near the easat side of the 'sunken area,' about 150 yards west of the east rim of South Table Mountain, about 2 1/2 miles (air) north of Oroville. 320 Comment
  CHSC90984  Sedella pumila Lowell Ahart 2005-5-11 11802 Butte Steep slope on the south side of Beatson Hollow, southwest of drainage entering Beatson Hollow, about 1 1/4 miles northwest of the poor dirt road off of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 280 Comment
  CAS-BOT-BC62116  Selaginella hansenii Lowell Ahart 1968-3-13 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  CHSC41990  Selaginella hansenii Lowell Ahart 1976-4-17 1082 Butte Along the trail to Feather Falls, near the Feather Falls overlook, about 5 miles north of Feather Falls. 609 Comment
  JEPS113218  Selaginella wallacei Lowell Ahart 2007-2-24 13584 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
  RSA0106558  Selaginella wallacei Lowell Ahart 2015-5-9 20158 Sierra North side of the Canyon Creek Trail, trail on the north side of the North Fork of the Yuba River, about 300 yards west of Highway 49, about one mile west of Indian Valley. 693 Comment
  JEPS113560  Senecio aronicoides Lowell Ahart, John Dittes 2007-6-17 14208 Plumas High west bank of 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
  CHSC59508  Senecio clarkianus Lowell Ahart 1992-8-6 6914 Sierra North of Black Jack Ravine, about 1 mile south of Granite Mountain, about 1/2 mile west of Harris Meadow. 1676 Comment
  CHSC84422  Senecio clarkianus Lowell Ahart 2003-9-2 10551 Nevada In a bog, about 50 yards east of a log landing, on the east side of a poor road, about 100 yards northeast of the locked gate, about 1/8 mile north of Grouse Ridge Road (Road 14), about 1/2 mile northeast of Bowman Lake Road (Forest Road 18), about 5 miles (air) north of Bear Valley and Highway 20. 1769 Comment
  CHSC88277  Senecio flaccidus var. douglasii Lowell Ahart 2004-6-30 11149 Glenn On the east side of the road to Grindstone Rancheria Indian Reservation, east of Grindstone Creek, about 1/4 mile east of Road 306 (Elk Creek Newville Road). 210 Comment
  CHSC96920  Senecio integerrimus var. exaltatus Lowell Ahart; John Dittes, Josephine Guardino 2007-6-9 14042 Plumas 50 yards west of a poor dirt road, about a mile (air) north of the north end of Lake Davis. 1857 Comment
  CHSC36520  Senecio integerrimus var. major L. Ahart 1982-5-8 3410 Butte Ca. 1/2 mi sw of the Forbestown Reservoir. 800 Comment
  SEINET10475268  Senecio layneae Lowell Ahart 1985-1 Butte Comment
  SEINET11806673  Senecio pauciflorus var. jucundulus L. Ahart, Ahart, P. 1983-1 4322 Plumas near Onion Valley, W of Pilot Peak, near Quincy-LaPorte Rd, NE of La Porte 2000 Comment
  CHSC42456  Senecio vulgaris Lowell Ahart 1987-3-20 5482 Butte On gravel bars along North Honcut Creek, about 2 1/2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. 67 Comment
  CHSC44901  Senecio vulgaris Lowell Ahart; Vern Oswald 1988-7-10 6124 Butte In the yard of Glenn and Ruth Cunningham, 660 Paseo Campaneros, Chico. 60 Comment
  CHSC98839  Senecio vulgaris Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14607 Merced Dry soil, grassy slopes, 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
  JEPS115244  Senecio vulgaris Lowell Ahart 2009-4-3 15523 Butte Along margins of the gravel road, east of the Cedar Grove parking area in Lower Bidwell Park, Chico 67 Comment
  CHSC78516  Sesbania punicea Lowell Ahart 2000-8-23 8660 Butte On the margins of a small pond, about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 4 miles (air) southwest of Oroville. 42 Comment
  JEPS127148  Sesbania punicea Lowell Ahart, John Dittes 2016-8-24 21270 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
  CHSC43289  Setaria gracilis Lowell Ahart 1987-9-24 5899 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
  RSA724851  Setaria parviflora L. Ahart 2006-9-28 13383 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
  JEPS95059  Setaria pumila Lowell Ahart 1997-9-11 7906 Plumas about 4 1/2 air mi ne of Belden (on w edge of Caribou Road, on w side of North Fork Feather River, about 1/2 mi s of Mosquito Creek); Caribou Road, North Fork Feather River 792 Comment
  RSA772427  Setaria pumila L. Ahart 2010-9-24 17237 Butte Near SW edge of the Golf Course, about 10 yrds south of the footbridge, along trail from the end of Centennial avenue to the footbridge across Big Chico Creek, Bidwell Park 91 Comment
  JEPS120148  Setaria pumila subsp. pumila Lowell Ahart 2012-10-20 18493 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
  JEPS117622  Setaria viridis Lowell Ahart, John Dittes, Josephine Guardino 2010-9-1 17140 Tehama On the south side of John Dittes home, about 100 yards south of Mill Creek, about 0.3 miles east of confluence with the Sacramento River, Los Molinos 64 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
  JEPS117235  Sidalcea hartwegii Lowell Ahart 2010-5-16 16694 Butte Just east of the basalt cliffs, about 1/4 mile south of the parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville 368 Comment
  CHSC61308  Silene bernardina Lowell Ahart 1993-7-29 7113 Butte About 2 miles east of Bald Mountain, about 6 (air) miles north-east of Stirling City. 1524 Comment
  CHSC58899  Silene douglasii Lowell Ahart 1992-7-29 6878 Butte About 1 mile north-east of the Carr Mine, about 3/4 mile north-west of Lotts Lake. 1798 Comment
  CAS-BOT-BC181291  Silene invisa Lowell Ahart 1986-9-10 5396 Plumas About 1/2 mile north-west of Pilot Peak, about 1/2 mile south-east of Onion Valley, about 14 miles north-east of La Porte 2072 Comment
  CHSC44513  Silene lemmonii Lowell Ahart 1988-6-29 6105 Butte Along the road to the Andy Smith Ranch, about 100 yards east of Bean Creek Road, about 1 1/2 miles south-east of Little Bald Rock. 914 Comment
  SD122533  Silene verecunda Lowell Ahart 1984-5-21 4631 Sutter East of where the road fork to go to each radio tower, near the lower radio tower on South Butte, Sutter Buttes, west of Marysville. 675 Comment
  CAS-BOT-BC364877  Silybum marianum Lowell Ahart 1982-5-30 3521 Sutter About 3/4 mile south of the Myers home, Myers Ranch, Sutter Buttes 50 Comment
  RSA715632  Sisymbrium altissimum L. Ahart, John Dittes 2005-6-9 12020 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
  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
  CHSC46532  Sisyrinchium elmeri Lowell Ahart 1984-7-19 4759 Butte About 1/2 mile east of Bald Mountain, about 5 miles north-east of Stirling City. 1584 Comment
  CHSC103450  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
  CHSC31473  Solanum americanum L. Ahart 1980-7-20 2471 Butte In a rd drain along the edge of the abandoned paved rd on the n side of the Suspension Bridge across Lake Oroville, n of Oroville. 330 Comment
  JEPS117251  Solanum dulcamara Lowell Ahart, John Dittes 2010-7-30 16939 Siskiyou Along the south edge of the Shasta River, about 100 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
  CHSC43367  Solanum parishii Lowell Ahart 1975-7-16 886 Plumas West of the South Fork of the Feather River, about 1 mile north of Little Grass Valley Reservoir. 1828 Comment
  RSA724977  Solanum umbelliferum L. Ahart 2006-6-15 12747 Glenn On the west side of Black Diamond Road, about 2.5 miles west of the paved road, about 4 3/4 miles 9by road) from stonyford. 750 Comment
  RSA473652  Solidago californica L. Ahart 1984-9-22 4808 Sutter Vicinity of South Butte, Sutter Buttes; west of Marysville; near the berry patch above the old homestead, on the south side of the Butte. 70 Comment
  SEINET10904952  Solidago californica Lowell Ahart 1984-9-22 Ahart 4808 Sutter Vicinity of South Butte, Sutter Buttes; west of Marysville. Valley Grassland and Foothill Woodland; 70 to 440 m in elev. 70 Comment
  RSA715690  Solidago canadensis subsp. elongata L. Ahart, Josephine Guardino 2005-8-10 12315 Plumas Along a small branch of Lights Creek, east side of Forest Road 27N54, about 5.5 miles (air) northwest of the Boulder Creek Work Center at Antelope Lake. 1822 Comment
  JEPS105951  Solidago elongata Lowell Ahart 2004-10-4 11428 Lake Along the stream that flows into Indian Valley Reservoir, the northeast part of the reservoir, on the south side of Bartlett Springs Road 458 Comment
  CHSC116656  Soliva sessilis Lowell Ahart; Josephine Guardino 2016-4-19 20768 Contra Costa Undesignated section of Canada de Los Vaqueros Land Grant. Along the sides of 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
  CHSC46337  Soliva sessilis Lowell Ahart 1989-5-23 6246 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
  CHSC98828  Sonchus asper subsp. asper Lowell Ahart; John Dittes, Josephine Guardino 2008-4-13 14687 Merced On dry soil, along the fence, about 40 yards 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
  JEPS124161  Sonchus oleraceus Lowell Ahart 2015-11-4 20612 Sutter About 50 yards east of George Washington Blvd., about 1 1/8 mile south of the intersection of Highway 20 and George Washington Blvd., Yuba City. Comment
  CHSC31658  Sonchus tenerrimus L. Ahart 1974-6-3 474 Butte In garden. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC112731  Sorghum halepense Lowell Ahart 2013-10-12 19110 Butte On the west side of Upper Palermo Road, about 250 yards south of the intersection, about 2 miles (air) northeast of Palermo. 51 Comment
  JEPS116115  Sparganium emersum subsp. emersum Lowell Ahart, John Dittes, Josephine Guardino 2009-8-27 16348 Tehama West side of pond, 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 1493 Comment
  CAS-BOT-BC389934  Spergula arvensis Lowell Ahart 1982-5-30 3463 Sutter About 1/8 mile west of the Myers home, Myers Ranch, Sutter Buttes 50 Comment
  CHSC11060  Spergula arvensis subsp. arvensis Lowell Ahart 1970-2-24 Butte Near Honcut. 45 Comment
  CHSC33675  Spergularia bocconi L. Ahart 1981-5-16 2799 Butte Along edge of dirt roads on Graylodge Waterfowl Mgmt Area, 11 mi sw of Gridley. 35 Comment
  JEPS117229  Spergularia bocconi Lowell Ahart 2010-5-7 16610 Butte 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
  CAS-BOT-BC390220  Spergularia bocconi Lowell Ahart 1982-4-24 3349 Sutter About 1/4 mile south-west of Myers home, Myers Ranch, Sutter Buttes 50 Comment
  JEPS102552  Spergularia rubra Lowell Ahart 2001-10-10 9363 Placer French Meadows Reservoir, near the boat or trail access area on the NW side of the reservoir, about 1 mile SW of the bridge across the Middle Fork of the American River, about 2 miles SW of Ahart Camp, about 22 miles (air) NE of Forest Hill. 1594 Comment
  JEPS120960  Spergularia rubra Lowell Ahart 2013-4-29 18657 Butte About 1/4 mile N of the Honcut Cemetery, about 3.25 air miles NE of Honcut, Comment
  RSA0118698  Spergularia rubra Lowell A. Ahart 2014-5-16 19478 Tehama Along the sides of the poor dirt road, about 200 yards southwest of the lone oak tree, about 0.5 mile east of the end of Lyon Cattle Road, about 3 miles (air) northeast of Los Molinos. 99 Comment
  CHSC115814  Sphenosciadium capitellatum Lowell Ahart; John Dittes 2015-8-6 20511 Tehama South of the camping area, west side of the Childs Meadow, 0.67 air-miles west of the intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.21 air- miles south east of Doe Mt., 10.41 air-miles south of Lassen Peak. Comment
  JEPS123930  Sphenosciadium capitellatum Lowell Ahart, John Dittes 2015-8-6 20511 Tehama West side of 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. Comment
  JEPS103402  Spiraea densiflora Lowell Ahart 2002-7-2 9826 Plumas In a logged over area on the S side of Forest Road 22N94, E of Forest Road 22N94E, on Hartman Bar Ridge, ca 1 mile (air) SW of Franklin Hill, ca 4 1/2 miles (air) NW of Tamarack Flat, ca 9 miles (air) NW of La Porte. 1606 Comment
  JEPS121975  Spiraea douglasii Lowell Ahart 2014-7-16 19686 Butte About 120 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CHSC71205  Spiranthes porrifolia Lowell Ahart 1998-6-30 8006 Butte West of th cow chute on the west side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  CHSC78350  Spiranthes porrifolia Lowell Ahart 2000-6-6 8453 Butte Southeast of where the dirt road crosses Oregon Gulch creek, about 1/4 mile northeast of the cemetery, about 1 1/2 mile south of Crystal Hill, about 5 miles (air) east of Oroville Dam. 304 Comment
  CHSC94498  Spiranthes porrifolia Lowell Ahart 2006-8-15 13183 Butte Near the center of a large open meadow with bogs, about 70 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
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Sep 6 2011
  JEPS87381  Stachys ajugoides var. ajugoides Lowell Ahart 1993-6-19 6973 Butte 8 mi w Gridley (on w side of Hatch Road (Goodspeed Watt Road)) 21 Comment
  JEPS105949  Stachys ajugoides var. rigida Lowell Ahart 2004-10-4 11434 Lake Below the high water line of Indian Valley Reservoir, along the stream in the northeast part of the reservoir, on the south side of Bartlett Springs Road 446 Comment
  JEPS98380  Stachys ajugoides var. rigida Lowell Ahart 2000-8-10 8641 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
  JEPS98292  Stellaria crispa Lowell Ahart 2000-7-13 8583 Sierra On damp sand along Negro Creek, west of Burlington, about 2 miles (air) northwest of Middle Waters, about 8 miles (air) northeast of Alleghany. 1584 Comment
  RSA755775  Stellaria crispa L. Ahart, John Dittes, Josephine Guardino 2009-7-21 16106 Plumas About 20 yards east of Forest Service Road 27N26, about 1000 feet northwest of Powerhouse at the north end of Butt Valley Reservoir, about 3 air miles southwest of Lake Almanor. 1303 Comment
  CHSC116270  Stellaria media Lowell Ahart 2015-11-7 20634 Butte On the bottom of Grizzly Creek, flows into Dark Canyon, about 1/8 mile southwest of parking area at end of old highway Alternate 50, strand of Lake Oroville, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. 231 Comment
  SEINET10833473  Stellaria nitens Lowell Ahart 1983-3-28 Ahart 3907 Butte Ca 0.5 mi sw of Forbestown Reserv., along the rd in slide area, ca. 4 mi ne of Forbestown. On serpentine, Yellow Pine Forest. 450 Comment
  CHSC61788  Stellaria obtusa Lowell Ahart 1993-9-10 7188 Sierra Along the edge of a small stream, at the end of a poor dirt road where there is a camp and water ditch, on the north side of Mount Fillmore, about 1 mile south-west of the dirt road from Gibsonville to Johnsville. 2133 Comment
  JEPS88146  Stellaria obtusa Lowell Ahart 1996-7-25 7696 Sierra ca. 2 mi. w. Webber lake (e. side of small stream, s. of Old Henness Pass Rd., just w. of French Meadow) 1950 Comment
  CHSC50989  Stephanomeria elata Lowell Ahart 1990-8-15 6592 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
  JEPS122340  Stephanomeria elata Lowell Ahart 2014-8-24 19725 Butte On the north side of the road, about 150 yards southwest of the Forbestown Reservoir Dam, about 4 miles (air) northeast of Forbestown. Comment
  SEINET10474968  Stephanomeria virgata Lowell Ahart 1984-10-22 Ahart 4826 Sutter On the south side of South Butte, Sutter Buttes, west of Marysville. Valley Grassland and Foothill Woodland; 150 to 500 m elev. 150 Comment
  RSA0116254  Stipa nelsonii var. dorei Lowell A. Ahart 2014-7-10 19606 Butte On the east side of the Skyway, about 2 miles north of Stirling City. 1250 Comment
  JEPS128588  Stipa webberi Lowell Ahart, John Dittes 2017-7-20 21639 Nevada On the north side of Prosser Creek, about 4 miles (air) west of Hobart Mills, about 5.2 miles (air) northwest of Truckee, basin of Prosser creek, Carpenter Valley. Comment
  CAS-BOT-BC87391  Streptanthus longisiliquus Lowell Ahart 1983-6-30 4187 Butte About 3 miles southeast of Stirling City, on the west side of the West Branch of the Feather River. 1100 Comment
  CHSC39048  Streptanthus longisiliquus Lowell Ahart 1983-6-30 4187 Butte About 3 mi SE of Stirling City, on dirt road on the west side of the West Branch of the Feather River; along the edge of the road. Section 10. 1100 Comment
  CAS-BOT-BC87438  Streptanthus polygaloides Lowell Ahart 1985-5-15 4975 Butte West of Lunt Road, about 0.5 mile north of the intersection of Lunt Road and Highway 70, north of Yankee Hill. 550 Comment
  JEPS98473  Streptanthus polygaloides Lowell Ahart 2000-5-31 8419 Butte 3 mi SE of Paradise (200 yds E of where Kunkle Creek enters Lake Oroville, E of Kunkle Power House) 335 Comment
  HSC96821  Streptanthus tortuosus var. orbiculatus L. Ahart 2006-7-3 12904 Plumas 0.25 mi. N of Lumpkin Ridge Rd., on Lumpkin Ridge, 4 mi. NE of Camp 18 1528 Comment
  CHSC43444  Streptanthus tortuosus var. suffrutescens Lowell Ahart 1978-5-2 1706 Butte Near the large parking area on the top of Table Mountain, about 7 miles north of Oroville. 487 Comment
  HSC96716  Streptanthus tortuosus var. suffrutescens L. Ahart 2006-5-8 12582 Butte 1/3 mi. N of parking area, cow chute, and Cherokee Rd., N Table Mtn., 7 mi. N of Oroville 402 Comment
  JEPS87619  Streptanthus tortuosus var. tortuosus Lowell Ahart 1994-7-7 7464 Plumas n side of trail about 3/4 mi (air) s. Pilot Peak; Pacific Crest Trail, Bunker Hill Ridge 2011 Comment
  JEPS87753  Streptanthus tortuosus var. tortuosus Lowell Ahart 1994-6-15 7331 Plumas about 1 (air) mi w; Little Grass Valley Reservoir (n side of intersection between Lumpkin Ridge Rd and road to Tamarack Flat) 1767 Comment
  JEPS103558  Streptopus amplexifolius var. americanus Lowell Ahart 2002-10-9 9965 Yuba On the W bank of a small stream, above the high water line of Sly Creek Reservoir, ca 1/8 mile SW of the Day Camp, Sly Creek Reservoir. 1079 Comment
  JEPS95901  Suaeda occidentalis Lowell Ahart 1999-9-13 8211 A Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  JEPS114622  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
  JEPS115609  Symphoricarpos albus var. laevigatus Lowell Ahart 2009-5-23 15731 Butte On the west edge of a meadow and the east bank of Big Chico Creek, west 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
  JEPS113371  Symphoricarpos rotundifolius var. rotundifolius Lowell Ahart, John Dittes, Josephine Guardino 2007-6-8 14010 Plumas Around trees, 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
  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
  RSA0060807  Symphyotrichum chilense Lowell A. 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
  CAS-BOT-BC98328  Symphyotrichum subulatum var. parviflorum Lowell Ahart 1982-9-9 3767 Butte Gray Lodge, SW of Gridley - sides of a deep ditch, about 100 meters north of the Check-in-Station, Gray Lodge, 35 Comment
  JEPS115032  Tanacetum parthenium Lowell Ahart 2007-11-1 14528 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
  CAS-BOT-BC376800  Tanacetum parthenium Lowell Ahart 1979-6-25 s.n. Yuba One mile south of Challenge 700 Comment
  JEPS107459  Taraxia tanacetifolia Lowell Ahart, John Dittes 2005-6-1 11856 Lassen In the center 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
  CAS-BOT-BC81331  Taxus brevifolia Lowell Ahart 1983-9-21 4460 Butte along French Creek, about 3 miles north of the Sly Creek Dam, north of Strawberry Valley 900 Comment
  JEPS104142  Thelypteris nevadensis Lowell Ahart 2003-7-12 10379 Butte On the south side of Milsap Bar Rd, ca 1 mi (air) se of the Brush Creek Work Center, ca 16 mi (air) ne of Oroville. 1048 Comment
  CAS-BOT-BC77716  Thelypteris nevadensis Lowell Ahart 1982-9-13 3808 Butte About 1/8 mile north of the Lost Creek Res. Dam, about 2 and 1/8 miles north-west of Strawberry Valley 1100 Comment
  UCD137773  Thelypteris nevadensis L. Ahart 1982-9-13 3808 Butte Pinkard Creek, ca. 1/8 mi N of Lost Creek Revervoir Dam, ca. 2.2 mi NW of Strawberry Valley. 1100 Comment
  SEINET10907342  Thlaspi montanum Lowell Ahart, Peter Ahart 1983-8-17 Ahart 4342 Plumas Near Onion Valley, west of Pilot Peak, near the Quincy-LaPorte Rd, northeast of La Porte. Red Fir Forest; 2000 m. 2000 Comment
  CAS-BOT-BC66855  Thysanocarpus curvipes Lowell Ahart 1981-3-14 2700 Sutter Dean Ranch, Sutter Buttes. 350 Comment
  CAS-BOT-BC88173  Thysanocarpus curvipes Lowell Ahart 1978-6-4 s.n. Sierra 4 miles south of Alleghany. 1300 Comment
  CHSC43429  Thysanocarpus curvipes Lowell Ahart 1976-3-7 1028 Napa About 2 miles south-west of Monticello Dam. 152 Comment
  JEPS94931  Thysanocarpus curvipes Lowell Ahart, Barbara Castro, Dan Barth, Diane Mastalir 1997-4-6 7732 Yuba about 17 mi ne of Marysville (along s side of Dry Creek, n of the poor dirt road, about 1 mi e of Scott Forbes Road (Long Bar Road)); Dry Creek 121 Comment
  CAS-BOT-BC66854  Thysanocarpus curvipes Lowell Ahart 1977-4-10 s.n. Sutter West side of South Butte, Sutter Buttes. 500 Comment
  JEPS104663  Tofieldia occidentalis subsp. occidentalis Lowell Ahart 2003-7-25 10456 Nevada Bog, ca 50 yd e of a log landing, on the e side of a poor road, ca 100 yd ne 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. 1769 Comment
  CHSC10710  Tonella tenella Lowell Ahart 1969-4-7 Napa Near Lake Berryessa. 243 Comment
  UC1609368  Torilis arvensis Lowell Ahart 1993-6-26 7044 Butte ca. 1.25 airmiles n.w. Lost Creek Reservoir (ca. 0.25 mi. n. of Jackass Flat, Mooreville Ridge); Mooreville Ridge 1188 Comment
  CHSC71254  Torilis arvensis subsp. purpurea Lowell Ahart 1998-7-1 8018 Butte Southwest of the Ione 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
  CHSC94871  Torilis arvensis subsp. purpurea Lowell Ahart 2006-6-11 12715 Glenn On road bank just east 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
  JEPS119874  Torilis arvensis subsp. purpurea Lowell Ahart 2012-6-2 18130 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
  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
  CHSC113834  Torreyochloa pallida var. pauciflora Lowell Ahart 2014-9-9 19843 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
  JEPS122320  Torreyochloa pallida var. pauciflora Lowell Ahart 2014-8-31 19806 Plumas On the west side of Black Rock Creek, about 200 yards southwest of the foot bridge across Black Rock Creek, about 200 yards southwest of the Black Rock, Little Grass Valley Reservoir, about 4 1/2 miles (air) northwest of La Porte. Comment
  CAS-BOT-BC518994  Triantha occidentalis subsp. occidentalis Lowell Ahart 1984-7-19 4758 Butte Meadow about 1/2 mile east of Bald Mountain, about 5 miles north-east of Stirling City. 1750 Comment
  CHSC84615  Trichostema lanceolatum Lowell Ahart; John Dittes 2003-9-17 10581 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
  CHSC51241  Trichostema oblongum Lowell Ahart 1977-7-9 1450 Plumas Growing near the edge of a small meadow, about 1/2 mile north of the Feather Fork Mine, about 6 miles north of La Porte. 1828 Comment
  JEPS122140  Trifolium Lowell Ahart 2014-5-2 19429 Butte About one mile northwest of Parking Area on the west side of Cherokee Road, about 8 miles (air) north of Oroville. (west of deep canyon, south of willow tops, extreme distance top of lone oak tree, north of deep drainage, fence, fence sigh, northwest top of Digger Pine). Comment
  JEPS124219  Trifolium Lowell Ahart 2015-3-27 19982 Butte About 1 mile (air) northwest of the improved parking area, North Table Mountain, about 8 miles north Oroville. Comment
  CHSC36250  Trifolium albopurpureum var. olivaceum L. Ahart 1982-4-17 3287 Sutter Ca. 1/2 mi nw of Dean Cabin, Dean Ranch, Sutter Buttes. 350 Comment
  JEPS118253  Trifolium andersonii var. andersonii Lowell Ahart, John Dittes 2011-6-22 17560 Modoc On the east side of the road, about 100 yards north of 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 Aden [Adin], 10 miles (air) east of Lookout, Big Valley 1264 Comment
  RSA695521  Trifolium arvense L. Ahart 2003-5-22 10196 Shasta About 50 yards S of the Coleman Canal, about 1 1/8 mi W of the barn, 4 mi (air) W-SW of Darah Springs State Fish hatchery, about 11 mi (air) E-NE of Cottonwood. 259 Comment
  CHSC109655  Trifolium bifidum var. bifidum Lowell Ahart 2012-5-12 18042 Butte On the sides of Guardian Trail, about 300 yards north of Humboldt Trail, about 1/8 mile west of Highway 32, south part of Upper Bidwell Park, about 8 miles (air) northeast of Chico. 361 Comment
  HSC103998  Trifolium bifidum var. bifidum L. Ahart 2012-5-12 18026 Butte About 9 air mi. NE of Chico, southern part of Upper Bidwell Park, ~0.5 air mi. W of Hwy. 32, ~300 yds. SW of Ten Mile House Rd., north of the large meadow 268 Comment
  JEPS103467  Trifolium bifidum var. bifidum Lowell Ahart 2002-5-4 9575 Nevada About 30 yards S of Perimeter Road, ca 40 yards E of the private driveway, ca 2.8 miles E of the intersection of Perimeter Road and White Oak Drive, ca 5 miles (air) E of Camp Far West Dam, ca 1 1/2 miles (air) SE of Rock Mountain. 243 Comment
  CHSC80527  Trifolium bifidum var. decipiens Lowell Ahart 2001-4-15 8724 Butte On the south side of the second dirt road south and then 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. 22 Comment
  JEPS102331  Trifolium bifidum var. decipiens Lowell Ahart 2001-4-15 8724 Butte 4 air miles SW of Gridley (S side of the second dirt road SE of the large pump, S side of Evans-Reimer Rd, 1 mi E of Pennington Rd, Gray Lodge Waterfowl Management Area) 22 Comment
  CHSC43418  Trifolium breweri Lowell Ahart 1979-6-25 1955 Yuba Along the road bank of the dirt road, about 2 miles east of Challenge, there is a spring near by and the gutter of the road was running water. 670 Comment
  JEPS102734  Trifolium breweri Lowell Ahart 2001-7-17 8915 Plumas Meadows, on the east 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
  JEPS121973  Trifolium breweri Lowell Ahart 2014-7-7 19572 Butte South of the intersection of Humbug Road and Philbrook Road, about 2 miles (air) northwest of Philbrook Reservoir. Comment
  SEINET10452485  Trifolium breweri Lowell Ahart 1983-8-16 Ahart 4310 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
  CHSC46369  Trifolium ciliolatum Lowell Ahart 1989-5-10 6207 Butte Near a dirt road, about 1/10 mile north-west of the West Branch Bridge across Lake Oroville. 304 Comment
  CHSC90831  Trifolium ciliolatum Lowell Ahart 2005-5-2 11758 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
  JEPS108818  Trifolium ciliolatum Lowell Ahart 2006-5-2 12553 Butte Pasture field, Peter Ahart Ranch, about 2 1/2 miles north and 1 1/8 miles east of Honcut, about 12 miles southeast of Oroville 32 Comment
  JEPS114729  Trifolium ciliolatum Lowell Ahart 2008-5-12 14744 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 northwest of the Ponderosa Dam 258 Comment
  CHSC100333  Trifolium cyathiferum Lowell Ahart 2008-7-16 15076 Plumas Forest floor, edge of a 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 La Porte. 1597 Comment
  CHSC65337  Trifolium cyathiferum Lowell Ahart 1995-10-1 7644 Plumas On the bottom of the drying pond, (reservoir dam washed out), Onion Valley, east of Quincy La Porte Road, about 1 mile north-west of Pilot Peak. 1828 Comment
  CHSC84178  Trifolium cyathiferum Lowell Ahart 2003-7-18 10430 Plumas In a meadow, on the north side of the road, about 1/4 mile west of Lumpkin Ridge Road, about 1 1/2 miles southeast of 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. 1709 Comment
  CHSC94106  Trifolium cyathiferum Lowell Ahart 2006-7-9 12934 Plumas In 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
  CHSC108997  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. 361 Comment
  CHSC43420  Trifolium depauperatum var. depauperatum Lowell Ahart 1976-4-10 1044 Nevada Near the edge of Money Road, south of the Engelbright Reservoir. 365 Comment
  CHSC93363  Trifolium depauperatum var. depauperatum Lowell Ahart 2006-4-27 12536 Butte Pasture fields, Peter Ahart Ranch, about 1 1/4 miles north and 1 1/4 miles east of Honcut. 39 Comment
  CHSC77989  Trifolium dubium Lowell Ahart 2000-5-13 8342 Butte On the south side of the access road to the boat ramp at the Thermalito Afterbay, west of Larkin Road, about 1 1/4 miles south of the Oroville Airport, about 5 miles (air) southwest of Oroville. 42 Comment
  HSC100826  Trifolium dubium Lowell Ahart 2007-5-12 13791 Yuba ~20 yd. NE of the second power tower, ~400 yd. N of Fruitland Rd., 13 (air) mi. NE of Marysville. 28 Comment
  CHSC113019  Trifolium fragiferum Lowell Ahart 2013-8-2 18978 Tehama 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
  CHSC102500  Trifolium glomeratum Lowell Ahart 2009-5-30 15777 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. 356 Comment
  JEPS117146  Trifolium glomeratum Lowell Ahart 2010-4-30 16586 Butte 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
  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
  CHSC46162  Trifolium hirtum Lowell Ahart 1983-5-4 3963 Sutter Along Pass Road, about 2 miles west of Kellogg Road, Sutter Buttes. 45 Comment
  SEINET11263973  Trifolium hirtum Lowell Ahart 2002-5-4 9578 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) southwest of Rock Mountain.; 0 244 Comment
  CHSC42538  Trifolium hybridum Lowell Ahart 1987-5-6 5529 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  JEPS115115  Trifolium hybridum Lowell Ahart, John Dittes, Josephine Guardino 2009-7-29 16231 Plumas On damp bare soil, below the high water line of Lake Almanor, 1,849 feet northwest of Lake Almanor Dam 1591 Comment
  JEPS115224  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
  CHSC117016  Trifolium longipes subsp. multipedunculatum Lowell Ahart; John Dittes 2016-6-6 20957 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 of Lookout, 7.5 miles (air) west of Adin, Ash Creek State Wildlife Area. 1271 Comment
  RSA718165  Trifolium longipes var. nevadense L. 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. 1519 Comment
  CHSC114982  Trifolium microcephalum Lowell Ahart 2015-4-18 20045 Butte On the east side of Swedes Flat Road, about 1/2 mile southwest of Dutch Ravine, about 8 miles (air) southeast of Oroville. 384 Comment
  JEPS103294  Trifolium microcephalum Lowell Ahart 2002-5-7 9623 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
  JEPS105935  Trifolium microcephalum Lowell Ahart 2004-4-4 10721 Butte About 300 yards east of Wilber Road, southeast of the high hill crossed by Wilber Road, southeast of the wash, cattle pasture, about 3 miles (air) west of Thermalito 48 Comment
  JEPS119705  Trifolium microcephalum Lowell Ahart 2012-5-2 17971 Butte West of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. 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
  SEINET10452521  Trifolium microcephalum Lowell Ahart 1983-5-4 Ahart 3949 Sutter Along edge of Pass Rd, ca. 4 mi w of Kellogg Rd, Sutter Buttes. Valley Grassland. West of Marysville. 50 Comment
  CHSC43383  Trifolium microdon Lowell Ahart 1976-5-6 1097 Nevada In a small grassy depression near the edge of the road, about 1 mile south of the McCourtney Dump, south-west of Grass Valley. 762 Comment
  JEPS110126  Trifolium obtusiflorum Lowell Ahart 2006-9-28 13370 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
  SEINET10841161  Trifolium oliganthum Lowell Ahart 1991-4-8 Ahart 6644 Butte On a steep slope on the west side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 and 3/4 miles east of Honcut, about 12 miles southeast of Oroville. Foothill Woodland. T17N R4E S11. 46 Comment
  UCSC010670  Trifolium phaeocephalum Lowell Ahart 2015-3-27 19973 Butte 400 yards southeast of Coal Canyon Falls, about 1 1/2 miles northwest of the improved parking area, North Table Mountain, about 8 miles north of Oroville 398 Comment
  CHSC110915  Trifolium pratense Lowell Ahart 2012-7-28 18391 Nevada On the west side of Pioneer Trail, about 80 yards east of the PG and E Pavilion and restrooms, on the east side of Bowman Lake Road, about 30 yards south of the Bear River, Bear Valley. 1433 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
  CHSC101692  Trifolium subterraneum Lowell Ahart 2009-5-8 15661 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
  JEPS104342  Trifolium variegatum Lowell Ahart 2003-5-12 10155 Shasta Near a vernal pool, 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
  RSA0036031  Trifolium variegatum var. major Lowell A. Ahart 2012-5-4 17990 Butte About 1/2 mile southwest 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
  CHSC41461  Trifolium variegatum var. variegatum Lowell Ahart 1986-5-26 5310 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 southwest of Pennington, Sutter Buttes. 45 Comment
  JEPS119710  Trifolium variegatum var. variegatum Lowell Ahart 2012-5-2 17964 Butte About 30 yards west of the Easter Cross Parking Lot, Upper Bidwell Park, about 1 mile east of Chico. Comment
  CHSC111376  Trifolium willdenovii Lowell Ahart 2012-5-2 17972 Butte On damp dark soil, 50 yards south of the fence, west of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. 85 Comment
  CHSC40431  Trifolium willdenovii Lowell Ahart 1986-5-15 5006 Butte West of a dry stream, 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow Res. 731 Comment
  JEPS105933  Trifolium willdenovii Lowell Ahart 2004-4-4 10723 Butte About 300 yards east of Wilber Road, southeast of the high hill crossed by Wilber Road, cattle pasture, about 3 miles (air) west of Thermalito 48 Comment
  JEPS114733  Trifolium willdenovii Lowell Ahart 2008-5-12 14749 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
  RSA715475  Trifolium willdenovii L. Ahart 2005-5-11 11794 Butte South part of North Table Mountain, about 200 yards northwest of the poor dirt road off of Cherokee Road, about 200 yard south of the rim into Beatson Hollow, about 7 miles (air) north of Oroville 359 Comment
  JEPS102373  Trifolium wormskioldii Lowell Ahart 2001-7-17 8904 Plumas about 2 1/2 air miles N of Humboldt Summit (W side of poor logging road, E of a small branch of Butt Creek) 1828 Comment
  GH404964  Trifolium wormskioldii L. Ahart 1994-6-27 7380 Unknown east 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
  SBBG128895  Trifolium wormskioldii L. Ahart 2008-8-13 15185 Plumas N edge of La Porte Rd, N of E Branch Crk, ca. 1 3/4 mi (air) S of Little Grass Valley Reservoir, ca. one mi NE of La Porte 1613 Comment
  CHSC98878  Triglochin scilloides Lowell Ahart; John Dittes, Josephine Guardino 2008-4-11 14654 Merced 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
  JEPS98400  Triodanis biflora Lowell Ahart 2000-5-17 8362 Butte 7 1/2 air miles W of Oroville (S margin of Thermalito Afterbay, N side of the poor dirt road, about 1/10 mi N of the Richvale Hwy, 1/2 mi E of Hwy 99) 42 Comment
  CHSC31558  Triodanis perfoliata L. Ahart 1974-5-14 454 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC96511  Triphysaria eriantha subsp. eriantha Lowell Ahart; Brian Williams 2007-4-13 13654 Placer On damp granite soil, 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
  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
  JEPS115940  Trisetum canescens Lowell Ahart, John Dittes 2009-7-13 16039 Plumas On dry soil, on the west 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
  JEPS117642  Trisetum canescens Lowell Ahart 2010-9-28 17256 Butte In the shade of Sierra Lodgepole Pine, about 5 yards west of Big Kimshew Creek, meadow edge, about 100 yards east of a 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
  UC1609035  Trisetum canescens Lowell Ahart 1993-7-22 7074 Butte on w side of dirt road about 1/2 mi nw Camp 18 (about 5 1/2 air mi ne of Feather Falls) 1097 Comment
  SEINET10860141  Trisetum canescens Lowell Ahart 1995-10-3 Ahart 7665 Tehama Northwest 1/4 Section 6. About 1 3/4 miles (air) north-east of Jonesville, about 6 1/2 miles (air) north-east of Butte Meadows. Red Fir Forest. 1646 Comment
  CHSC55316  Trisetum projectum Lowell Ahart 1991-9-19 6727 Butte Near where the two branches of Wildcat Creek come together, about 2 miles north-west of Four Trees, about 2 miles west of the Oroville-Quincy Highway, about 2 miles north-east of Coyote Gap. 1219 Comment
  CHSC115547  Turritis glabra Lowell Ahart; John Dittes 2015-8-5 20476 Tehama East side of Childs Meadow, 150 yeards 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
  CHSC43807  Turritis glabra Lowell Ahart 1975-7-2 841 Plumas Near the dirt road, west of Lost Creek, about 7 miles north of the Sly Creek Dam. 914 Comment
  SEINET10567578  Typha domingensis Lowell Ahart 1984-9-22 Ahart 4805 Sutter Vicinity of South Butte, Sutter Buttes; west of Marysville. Valley Grassland and Foothill Woodland; 70 to 440 m in elev. 70 Comment
  JEPS120040  Ulmus minor Lowell Ahart, Josephine Guardino, Tyron Chang 2012-10-12 18479 Butte About 20 yards north of the sign Orient Street and E 1st Street, on the south side of Annie's Glen, Lower Bidwell Park, Chico. Comment
  CHSC109103  Umbellularia californica Lowell Ahart 2012-3-23 17796 Butte On the north side of Ten Mile House Road, about 1/2 mile west of Highway 32, about 9 miles (air) northeast of Chico. 387 Comment
  JEPS113135  Umbellularia californica Lowell Ahart 2007-2-15 13564 Nevada On the north side of the South Fork of the Yuba River, about 200 yards east of Bridgeport State Park 224 Comment
  JEPS124231  Uropappus lindleyi Lowell Ahart 2015-4-1 19997 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
  CHSC94422  Urtica dioica subsp. holosericea Lowell Ahart 2006-8-9 13172 Colusa East side of East Park Reservoir, about 1/2 mile north of Lodoga, west of the road from Lodoga to Maxwell. 365 Comment
  JEPS98326  Utricularia gibba Lowell Ahart 2000-6-17 8479 Butte 2 mi S of Paradise (about 1/4 mi NE of Kunkle Reservoir, E of the Pentz Magalia Road) 548 Comment
  CHSC82357  Vaccinium membranaceum Lowell Ahart 2002-7-6 9843 Plumas On the south side of the dirt road and south of the large meadow, on Rock Island Ridge, about 3/4 mile southeast of Soapstone Hill and the Oroville Quincy Highway, about 1 1/2 miles (air) northeast of Four Trees. 1611 Comment
  CHSC78247  Vaccinium uliginosum subsp. occidentale Lowell Ahart 2000-7-13 8590 Sierra On the edges of a small boggy meadow, on a upper west branch of Black Jack Ravine, on the east side of Forest Highway 98, Harris Meadow, about 7 miles (air) northeast of Alleghany. 1615 Comment
  CHSC65197  Velezia rigida Lowell Ahart 1995-5-30 7582 Butte Along the edge of the dirt road, south of Beatson Hollow, about 1/8 mile north of Cherokee Road, North Table Mountain, about 7 miles north of Oroville. 335 Comment
  JEPS106058  Velezia rigida Lowell Ahart 2004-6-18 11088 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
  JEPS106289  Velezia rigida Lowell Ahart, John Dittes, Josephine Guardino 2004-4-15 10744 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-BC391336  Velezia rigida Lowell Ahart 1987-5-6 5520 Butte At the Poe Power House on the North Fork of the Feather River, about 2 miles south-east of Jarbo Gap 283 Comment
  JEPS121927  Veratrum californicum var. californicum Lowell Ahart 2014-7-16 19691 Butte About 110 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CDA42883  Verbascum virgatum L. Ahart 2012-5-31 18115 Butte On the south side of Neal Road, west of the intersection of Highway 99 and Neal Road, about 3 miles (air) south of Chico. Comment
  RSA0045591  Verbascum virgatum Lowell Ahart 2012-5-31 18115 Butte On the south side of Neal Road, west of the intersection of Highway 99 and Neal Road, about 3 miles (air) south of Chico. 59 Comment
  CHSC117633  Verbena bonariensis Lowell Ahart; John Dittes 2016-8-25 21290 Tehama Along the west edge of the Sacramento River, Anderson River Park, 0.7 mile (air) upstream from Sillwater Creek Confluence, 1.8 miles (air) northeast of Balls Ferry Road exit from Interstate 5 in Anderon. Undesignated section of San Buenaventura Land Grant. 117 Comment
  CHSC103154  Verbena hastata Lowell Ahart 2009-8-3 16260 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
  CHSC40371  Verbena lasiostachys var. scabrida Lowell Ahart 1985-5-20 5016 Sutter On the bottom of a small dry stream, about 3/4 mile north-east of the old gas well, on the south side of the South Butte, Sutter Buttes. 274 Comment
  CHSC58962  Verbena litoralis Lowell Ahart 1992-7-23 6825 Butte On the north side of the Thermalito Diversion Pool, near Longs Bar Monument, Lake Oroville Recreation Area, about 2 miles west of Oroville Dam. 76 Comment
  RSA337382  Verbena robusta L. Ahart 1984-9-22 4809 Sutter Vicinity of South Butte, Sutter Buttes; west of Marysville. 70 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
  CHSC69434  Veronica americana Lowell Ahart 1997-8-13 7861 Yuba On the south side of Scott Forbes Road, 1.4 mile east of the intersection of Scotts Forbes Road and Peoria Road, just east of Gray Drive, about 2 1/4 miles (air) east of Browns Valley. 91 Comment
  JEPS115137  Veronica anagallis-aquatica Lowell Ahart 2009-11-12 16524 Mendocino Mud flat 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
  JEPS98436  Veronica anagallis-aquatica Lowell Ahart 2000-5-25 8397 Yuba 6 air mi S of Smartville (bottom of a deep wash, a N branch of Dry Creek, 2 mi N of intersection of Waldo Road and Smartville Road, 100 yds W of Smartville Road) 146 Comment
  RSA0118725  Veronica anagallis-aquatica Lowell A. Ahart 2014-4-25 19401 Butte On the west side of Richvale South Highway, south of the intersection of Richvale West Road and Richvale South Highway, Richvale. 31 Comment
  CHSC47509  Veronica arvensis Lowell Ahart 1980-5-4 2195 Butte About 1/2 mile east of the Oak Grove Cementery, about 1 mile south-east of Hurleton. 548 Comment
  CHSC112773  Veronica catenata Lowell Ahart; John Dittes 2013-7-24 18922 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 County Road 87, 6.8 miles (air) west of Adin, Big Valley. 1263 Comment
  JEPS120908  Veronica catenata Lowell Ahart, John Dittes 2013-6-9 18791 Shasta Hollenbeck Field, 950 feet E of Rat Farm Boat Launch, 3.4 air miles N of McArthur, Fall River Valley, McArthur Swamp. Comment
  RSA0118766  Veronica catenata Lowell A. Ahart, John Dittes 2013-6-9 18791 Shasta Hollenbeck Field, 950 feet east of Rat Farm Boat Launch, 3.4 air miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  CHSC102969  Veronica peregrina subsp. xalapensis Lowell Ahart; John Dittes 2009-9-7 16395 Plumas Below the high water line of Lake Almanor, about 2000 feet northwest of Lake Almanor Dam. 1591 Comment
  CHSC112407  Veronica peregrina subsp. xalapensis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18744 Lassen Drainage filled with dirt from 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
  CHSC117569  Veronica peregrina subsp. xalapensis Lowell Ahart 2016-7-14 21185 Modoc Around the strand of a new pond, south of Ash Creek Canal (now filled in) , south of Ash Creek Canal Wildlife Area, 0.79 mile (air) south of County Road 87, 1.73 miles (air) west of Adin, Big Valley. 1273 Comment
  CHSC97144  Veronica peregrina subsp. xalapensis Lowell Ahart; John Dittes, Josephine Guardino 2007-6-8 14029 Plumas Strand of Lake Davis, southeast of the end of the road, north end of Lake Davis. 1763 Comment
  CHSC99005  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 Ponderosa Dam. 246 Comment
  SEINET10547694  Veronica peregrina var. xalapensis Lowell Ahart 1984-4-19 Ahart 4574 Sutter Along West Butte Road, ca. 1.8 mile N of Sacramento Outing Club, Sutter Buttes, west of Marysville. Valley Grassland; 35 m. 35 Comment
  CHSC99818  Veronica serpyllifolia subsp. humifusa Lowell Ahart 2008-7-16 15097 Plumas Forest floor, northwest edge of a small meadow, 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
  CHSC43564  Veronica serpyllifolia var. humifusa Lowell Ahart 1975-7-20 908 Plumas Along the edges of Bunker Hill Creek, about 1 mile north of the Bunker Hill Mine, about 12 miles north-east of La Porte. 1828 Comment
  JEPS103320  Vicia americana var. americana Lowell Ahart 2002-6-29 9811 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
  CHSC30041  Vicia sativa subsp. nigra L. Ahart 1980-5-17 2296 Butte Under oak trees a little e of the Oak Grove Cemetery, ca. 1/2 mi se of Hurleton. 600 Comment
  CHSC103989  Vicia villosa subsp. varia Lowell Ahart 2010-5-14 16635 Butte On the west side of Highway 32, just north of the entrace to the Disc Golf Area, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 376 Comment
  CHSC117028  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. 1712 Comment
  CHSC65181  Viola pinetorum subsp. pinetorum Lowell Ahart 1995-8-7 7605 Plumas On the east side of the Pacific Crest Trail, on Bunker Hill Ridge, about 1/4 mile (air) south of Pilot Peak. 2011 Comment
  CHSC47516  Viola purpurea subsp. purpurea Lowell Ahart 1982-6-4 3535 Butte 1 1/2 miles east of Camp 18, about 8 miles east of Feather Falls. 1280 Comment
  CHSC87340  Viola purpurea subsp. purpurea Lowell Ahart 2004-4-27 10768 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
  CHSC42481  Vitis californica Lowell Ahart 1987-5-9 5591 Butte Near a wash, along Pulga Road, about 1/4 mile west of Bardees Bar along the North Fork of the Feather River, about 2 1/2 miles south-west of Pulga. 365 Comment
  RSA0121712  Vitis californica L. Ahart 1984-10-22 4828 Sutter On the S side of South Butte, Sutter Buttes, west of Marysville. 150 Comment
  JEPS116060  Vulpia bromoides Lowell Ahart, John Dittes, Josephine Guardino 2009-6-14 15878 Plumas About 1600 feet southwest of Lake Almanor Dam 1386 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
  CHSC93452  Vulpia microstachys var. ciliata Lowell Ahart 2006-5-10 12619 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
  RSA712952  Vulpia microstachys var. ciliata L. Ahart 2006-5-10 12619 Butte Bardees Bar Road, about 100 yards north of poor bridge across the North Fork of the Feather River at Bardees Bar, about 2 1/2 miles (air) southwest of pulga. 355 Comment
  CHSC84098  Vulpia microstachys var. pauciflora Lowell Ahart; John Dittes 2003-5-12 10169 Shasta 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
  CHSC94183  Vulpia microstachys var. pauciflora Lowell Ahart 2006-6-21 12813 Sierra On the west side of the Foote Road, about 3.7 miles (by road) southwest of Alleghany. 1093 Comment
  JEPS107322  Vulpia microstachys var. pauciflora Lowell Ahart 2005-3-11 11616 Yuba Large rock outcrop, south slope, 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 395 Comment
  CAS-BOT-BC185843  Vulpia myuros subsp. megalura Lowell Ahart 1982-4-24 3371 Sutter Near the dirt road about 1/4 mile south-west of Myers home, Myers Ranch 50 Comment
  CHSC36271  Vulpia myuros var. hirsuta L. Ahart 1982-4-24 3371 Sutter Near the dirt road ca. 1/4 mi sw of Myers home, Myers Ranch, Sutter Buttes. 50 Comment
  CHSC50067  Vulpia myuros var. hirsuta Lowell Ahart 1990-2-9 6410 Butte Below 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. 289 Comment
  CHSC90340  Vulpia myuros var. hirsuta Lowell Ahart 2005-3-11 11609 Yuba 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 5 miles (air) northeast of Loma Rica. 395 Comment
  JEPS107665  Vulpia myuros var. hirsuta Lowell Ahart, John Dittes 2005-6-9 12012 Siskiyou 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
  POM352987  Vulpia myuros var. hirsuta L. Ahart, P. Ahart 1984-6-10 4705 Butte About 2 miles SW of Forbestown Diversion Dam, NE of Forbestown. 700 Comment
  CHSC94724  Woodwardia fimbriata Lowell Ahart 2006-9-28 13361 Butte South side of Bear Ranch Creek, at the entrance to the tunnel, about 1/8 mile east of Highway 70, about 1/4 mile southeast of the Shady Rest Area south of the Arch Rock Tunnel. 480 Comment
  JEPS113774  Woodwardia fimbriata Lowell Ahart, Lawrence Janeway, Linnea Hanson 2007-7-10 14281 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
  UCD136144  Woodwardia fimbriata L. Ahart 1982-9-29 3840 Butte Pinkard Creek, ca. 1.5 mi. N. of Lost Creek Reservoir, ca. 3.5 mi. NW of Strawberry Valley. 1200 Comment
  CHSC50019  Yabea microcarpa Lowell Ahart 1990-4-8 6448 Butte On the south side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville. 33 Comment
  CDA34669  Zannichellia palustris L. Ahart 2009-10-12 16467 Napa Small pool in 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 Comment



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