Search Results — 2000 specimen records retrieved (1633 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
  CHSC20540  Abelia schumannii Pamela Caldwell 1971-9-26 Butte SW corner of Auditorium CSUC. Comment
  CAS-BOT-BC77977  Abies concolor Saichi Kawahara 1968-5-5 396 Butte Innskip 1463 Comment
  SEINET11739535  Abies concolor L. Ahart, Ahart, P. 1984-1 4812 Butte on South Fork of Feather River, near the new bridge, ca 1 mi N of Golden Trout Crossing 700 Comment
  CHSC26687  Abies magnifica M. S. Taylor; M. Hayes, R. Schlising 1977-8-17 1487 Butte Humboldt Summit, at Butte-Tehama county line, on Butte side. 2133 Comment
  CHSC109781  Abutilon theophrasti Lowell Ahart 2012-10-20 18485 Butte On the north side of the sidewalk, about 50 yards west of the intersection of Chico Canyon Road (E 8th Street) and Forest Avenue, Lower Bidwell Park, Chico. 73 Comment
  CHSC91  Acer circinatum 1935-4-1 Butte West Branch on Deer Cr. Road 762 Comment
  CAS-BOT-BC330613  Acer glabrum var. glabrum A. A. Heller 1915-6-16 12025 Butte Summit of the Sierra Nevada above Jonesville 2133 Comment
  CHSC46797  Acer glabrum var. torreyi R. A. Schlising; L. Janeway 1988-7-22 4622 Butte NE of Philbrook Lake, near county line 1935 Comment
  SEINET10453993  Acer macrophyllum Mary Susan Taylor 1982-5-2 Taylor 4400 Butte T23N R5E se/se sec 15. Pulga Sw quad. N side of Hwy 70, on granite, 0.5 mi w of Arch Rock Tunnel, ca. 25 air mi ne of Oroville. 1550 ft. 472 Comment
  CAS-BOT-BC21705  Achillea millefolium Clarence Roy Quick 1964-7-9 64 -60 Butte North of Jarbo Gap Comment
  CHSC95214  Achillea millefolium R. D. Fischer 2004-5-2 801 Butte Chico. Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition off Hwy. 32. Collected along the Guardian Trail between the Pine and Bloodypin Trails. 335 Comment
  UC444995  Achillea millefolium E. B. Copeland 1930-7-1 5 m5 Butte along, on dry bars Butte Creek; Jonesville 1500 Comment
  CHSC42446  Achnatherum lemmonii Lowell Ahart 1987-5-22 5663 Butte About 1/4 mile south-east of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls. 1280 Comment
  CHSC6754  Achnatherum lemmonii Marilyn Lee 1968-5-3 160 Butte South side of Coutolenc Rd., ca 1 mile N. of Magalia. Comment
  RSA268070  Achnatherum lemmonii var. lemmonii J. R. Reeder, C. G. Reeder 1972-6-6 5654 Butte Ca. 4 miles N of Forest Ranch. 1067 Comment
  CAS-BOT-BC29949  Achyrachaena mollis Lowell Ahart 1979-5-11 s.n. Butte Peter Ahart Ranch near Honcut 15 Comment
  CHSC33349  Achyrachaena mollis R. M. Winchell 1980-4-23 2 Butte N of Chico, in annual grassland by vernal pool between Singer Creek and Cana-Pina Creek Road. Comment
  CHSC40913  Acmispon argophyllus var. fremontii Lowell Ahart 1977-4-28 1324 Butte About 1 mile north-east of the Ponderosa Dam, north of Forbestown. 457 Comment
  CHSC50667  Acmispon argophyllus var. fremontii Lowell Ahart 1990-5-25 6482 Butte Near the high water line of Lake Oroville, east of the Enterprise Boat Launch Area, about 1/8 mile north-west of the Enterprise Bridge across Lake Oroville. 274 Comment
  CHSC108789  Acmispon brachycarpus Lowell Ahart 2012-4-9 17845 Butte Near the high east cliff edge of Big Chico Creek, about 5 yads west of South Rim Trail, south part of Upper Bidwell Park, about 2 1/2 miles (air) northeast of Chico. 206 Comment
  CHSC62739  Acmispon grandiflorus var. macranthus L. P. Janeway 1993-5-20 4350 Butte Plumas National Forest. Swayne Hill. South-facing road cutbank overlooking lower French Creek. 746 Comment
  HSC43133  Acmispon micranthus Maralyn O'Meara 1974-4-20 290 Butte Table Mtn. 305 Comment
  JEPS120601  Acmispon nevadensis Lowell Ahart 2013-11-17 19269 Butte About 60 yards east of McCabe Creek, below the high water line of Lake Oroville, about 5/8 mile southwest of the enterprise Bridge across Lake Oroville. Comment
  RSA0037018  Acmispon nevadensis var. nevadensis Lowell A. Ahart 2013-11-17 19269 Butte About 60 yards east of McCabe Creek, below the high water line of Lake Oroville, about 5/8 mile southwest of the Enterprise Bridge across Lake Oroville. 245 Comment
  UCD104320  Acmispon parviflorus P. B. Kennedy 1929-5-4 s.n. Butte Near Paradise. Comment
  CHSC31960  Acmispon wrangelianus J. D. Jokerst 1979-5-2 1218 Butte Top of North Table Mountain, ca. 200 meters S of Cherokee Rd. 396 Comment
  CHSC33336  Aconitum columbianum R. Banchero 1980-8-1 330 Butte 0.4 mi w of the e end of Philbrook Lake, 4.3 mi se of the jct of Skyway and Philbrook Rd. Mdw. 1706 Comment
  SD1731  Aconitum columbianum E. B. Copeland 1929-7-22 363 Butte Jonesville, moist glades and thickets 1500 Comment
  CHSC52113  Aconogonon phytolaccifolium L. P. Janeway 1988-7-29 3105 Butte Above bank of Butte Cr at Butte Meadows, crossing of Bull Hill Rd (The Skyway). 1325 Comment
  SEINET10573363  Actaea rubra R. M. Austin Austin 275 Butte Comment
  CAS-BOT-BC69659  Adiantum aleuticum Lowell Ahart 1980-9-10 2635 Butte 3 mi. ne. of Milsap Bar. 1100 Comment
  CHSC38244  Adiantum aleuticum Vernon Oswald 1983-6-17 702 Butte Upper Bidwell Park, Chico, on the s side of Chico Creek ca. 200 ft w of Day Camp. 91 Comment
  CHSC84627  Adiantum aleuticum Matt Quinn 2001-4-23 52 Butte Found growing along bedrock wall on south side of Honey Run Creek, approximately 3/4 mile upstream of confluence with Little Butte Creek. 243 Comment
  SEINET7728123  Adiantum emarginatum C. C. Parry 2000-1 Butte Chico Comment
  CHSC44957  Adiantum jordanii Lance E. Neuman 1987-4-10 19 Butte Ca. 200 yd ne of Horseshoe Lake. 106 Comment
  CAS-BOT-BC65615  Adiantum jordanii Lowell Ahart 1980-3-13 2041 Butte 2 1/2 mi. N and 3 mi. E of Honcut, near North Honcut Creek near the flood-gate 60 Comment
  CDA415  Aegilops triuncialis L. Ahart 2005-7-12 12142 Butte Poor road on the south side of Forest Road 21N40, about 100 yards west of Encina Grade Road (Bloomer Hill Road) (Forest Road 21N39), about 3/4 of a mile (air) west of Bloomer Hill, about 6 miles west of Oroville Quincy Highway. Comment
  CHSC65209  Aegilops triuncialis Lowell Ahart 1995-5-30 7581 Butte South of Beatson Hollow, about 1/8 mile north of Cherokee Road, North Table Mountain, about 7 miles north of Oroville. 335 Comment
  CHSC20249  Agoseris heterophylla M. Banning 1969-4-18 61 Butte Junction of Pentz Rd. and Pentz Magalia Rd. 304 Comment
  CAS-BOT-BC13174  Agoseris monticola V. Oswald; L. Ahart 1988-10-6 3707 Butte Near the headwaters of Big Kimshew Creek, ca. 1.5 air miles NE of Jones Meadow 1950 Comment
  CHSC115189  Agoseris retrorsa Lowell Ahart 2015-4-27 20090 Butte On the northside of the dirt road, about 5/8 mile northwest of the iron gate along Cherokee Road, Beatson Hollow, North Table Mountain, about 7 miles (air) of Oroville. 304 Comment
  UCD146247  Agoseris retrorsa Daniel S. Park; D. Potter 2010-4-10 16 Butte Table Mt. Downhill trail across from waterfall. Growing on slope. 314 Comment
  SEINET10475111  Agoseris retrorsa Mary Susan Taylor 1981-5-21 Taylor 3771 Butte T22N R4E nw/nw sec l and ne/ne sec 2, Pulga SW quad. S side of Concow Rd, ca. 0.5 mi S of its jct with Ponderosa Way (Rim Rd), ca. 20 air mi N of Oroville. In reddish weathered serpentine; 2800 ft. 853 Comment
  SEINET10508561  Agrostis diegoensis Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4091 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
  CAS-BOT-BC127365  Agrostis exarata Lowell Ahart 1987-7-3 5765 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles southeast of Jarbo Gap. 271 Comment
  CHSC51285  Agrostis exarata var. monolepis Lowell Ahart 1990-9-30 6608 Butte On the bottom of the East Fork of Canyon Creek, below the high water line of Lake Oroville, about 1/8 mile north-east of the Canyon Creek Bridge across Lake Oroville. 243 Comment
  CHSC34060  Agrostis gigantea L. Ahart; M. S. Taylor, J. T. Howell 1981-8-15 3045 Butte N end of Snag Lake, ca. 10 mi n of Inskip. 1500 Comment
  CHSC108057  Agrostis hendersonii Melanie Williams; Tim Hanson, Matt Simenc, Nicole Habecker 2011-6-22 Butte Northern High Sierra Nevada. Plumas National Forest; northwest facing slopes near the top of the ridge on the southeast side of Martin Creek, 1.9 air miles northeast of Madrone Lake. 755 Comment
  CHSC40448  Agrostis hendersonii Lowell Ahart 1985-5-22 5029 Butte Along the edge of Bean Creek Road, about 1/2 mile south-east of Little Bald Rock. 1066 Comment
  JEPS94298  Agrostis pallens Lowell Ahart 1997-8-1 7772 Butte about 8 air mi ne of Stirling City (about 1/4 mi e of Table Mountain, on e side of Little Kimshew Creek, Snow Meadow); Snow Meadow, Little Kimshew Creek 1524 Comment
  CHSC38781  Agrostis stolonifera Vernon Oswald 1983-6-27 767 Butte Upper Bidwell Park, Chico, in the bed of Lindo Channel near the Diversion weir. 79 Comment
  HSC39885  Aira caryophyllea J. P. Smith 1973-3-22 5925 Butte 2.1 mi. E of junction with Hwy. 99 and the road to Paradise 122 Comment
  JEPS114957  Aira caryophyllea Lowell Ahart 2008-5-12 14740 Butte below the high water line of Lake Oroville, on the E side of Sucker Creek, about 40 yds N of where Sucker Creek enters the South Fork of the Feather River, about 1/4 mi W of the Ponderosa Dam 258 Comment
  CAS-BOT-BC138410  Aira caryophyllea var. capillaris Lowell Ahart 1980-5-17 2289 Butte 0.5 mile southeast of Hurleton. 600 Comment
  CHSC34032  Alisma triviale L. Ahart 1981-7-7 2926 Butte Along the edge of Black Bart Rd, ca. 1/2 mi w of the Oroville-Forbestown Rd, w of Forbestown. 700 Comment
  CAS-BOT-BC445432  Alisma triviale Lowell Ahart 1981-7-7 2926 Butte Along edge of Black Bart Road, 1/2 mi. west of Oroville Forbestown Road, west of Forbestown. 700 Comment
  CHSC32373  Allium amplectens J. D. Jokerst 1979-5-2 1226 Butte Top of North Table Mt. Along Cherokee Rd at the E edge of the mountain. 396 Comment
  CHSC96559  Allium amplectens L. P. Janeway 2006-4-30 8569 Butte Cascade Range Foothills. East edge of city of Chico; northwest side of Humboldt Road 2.4 km northeast of Bruce Road. 149 Comment
  CAS-BOT-BC460740  Allium amplectens A. A. Heller; H. E. Brown 1902-5-7 5480 Butte Berry Canyon (Near Clear Creek) Comment
  UC600451  Allium campanulatum H. F. Copeland 1930-7-19 Butte Jonesville 1524 Comment
  JEPS122448  Allium hyalinum L. P. Janeway 2015-3-5 11634 Butte Sacramento Valley. North side of Thermalito Forebay, on the west side of Nelson Ave. Quad: Oroville 7.5' Comment
  CHSC36952  Allium membranaceum R. A. Schlising 1980-6-6 3649 Butte N of Lake Oroville along Bald Rock Road, 0.8 mi s of jct with Oroville-Quincy Hwy at Brush Creek. 1024 Comment
  CHSC49704  Allium peninsulare var. peninsulare Vernon Oswald 1985-5-6 1744 Butte Concow Rd. 1.1 me sw of its jct. With Ponderosa Way. 853 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
  CHSC27033  Allophyllum divaricatum Robert A. Schlising 1978-6-11 3291 Butte Along Cohasset Rd, below Cohasset, 5.5 mi NE of crossing of Mud Cr and 5.3 mi NE jct of rd to Richardson's Springs; ridge top. Comment
  CHSC35098  Allophyllum divaricatum R. A. Schlising 1981-6-13 4079 Butte Pulga, roadside. Comment
  UC1586630  Allophyllum divaricatum Lowell Ahart 1991-6-22 6662 Butte n. of Springtown Rd. Lake Oroville 243 Comment
  RSA325885  Allophyllum divaricatum L. Ahart, P. Ahart 1983-7-29 4258 Butte Ca. 3 mi e of Milsap Bar, ca. 25 mi ne of Oroville. 1100 Comment
  UC600663  Allophyllum integrifolium E. B. Copeland 1931-6-29 Butte along Butte Creek Jonesville; , Butte Creek 1500 Comment
  CDA9273  Alnus rhombifolia D. G. Kelch 2006-8-2 6 .353 Butte Along Butte Creek, north of Durham-Dayton Hwy. Comment
  CHSC27225  Alnus rhombifolia P. Moyer 1971-11-1 86 Butte CSUC campus. Front of campus Copy Cat. 60 Comment
  CHSC5944  Alnus rhombifolia M. MacArthur 1968-6-17 174 Butte Location: Hanging over SW edge of Big Chico Creek Ne of Dining Hall, Chico State College Campus. 60 Comment
  SEINET10478440  Alnus rhombifolia Mary Susan Taylor 1975-10-4 Taylor 961 Butte E side of Kunkle Reservoir, ca. 1/4 mi E of Pentz-Magalia Hwy, ca. 1 mi S of Paradise; open to sun. 610 Comment
  RSA695396  Alopecurus carolinianus L. Ahart 2003-3-31 10030 Butte 50 yards east of the drain ditch, about 20 yards north of Hamilton Road, about 3/8 miles east of Riceton Highway, about 10 miles southwest of Oroville. 30 Comment
  SEINET237587  Alopecurus carolinianus Carl M. Wick 1986-4-2 Butte 1/2 mile east of Richvale Richvale East/ Erickson Road. Comment
  CAS-BOT-BC137942  Alopecurus saccatus Clare B. Hardham 1978-4-17 21568 Butte Table Mountain. Comment
  CHSC8196  Alopecurus saccatus D. McClain 1969-4-18 59 Butte 1/2 mi. n.w. of gate on Table Mountain, 5 mi. s.w. on Cherokee Rd. from its junction with Feather River Highway. 487 Comment
  CHSC8197  Alopecurus saccatus Dave Isle 1969-4-18 373 Butte 6 1/2 miles N. of Oroville on Cherokee Road (about 500 + yards W. of road on Table Mtn.) 289 Comment
  UCD169922  Alopecurus saccatus Lowell Ahart 2010-5-16 16691 Butte North Table Mountian, about 1/4 mile south of the parking area. About 4 1/2 miles (air) northeast of Oroville. 371 Comment
  SEINET10507157  Alopecurus saccatus Lowell Ahart 1983-5-12 Ahart 3978 Butte Along the power line, ca. 0.5 mi ne of jct of Hwy 99 and Pentz Rd, ca. 16 mi s of Chico. Valley Grassland; 65 m. 65 Comment
  SEINET7903210  Amaranthus albus R. R. Halse 2006-8-2 6981 Butte Chico; in the Lindo Channel Greenway where it crosses under Mangrove Ave. 92 Comment
  CHSC116132  Amaranthus californicus Lowell Ahart 2015-11-7 20616 Butte Strand of Lake Oroville, on the east side of the old highway Alternate 40, about 1/4 mile south of the end of Alternate 40, Dark Canyon, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. 236 Comment
  CHSC107232  Amaranthus deflexus Lowell Ahart 2011-6-3 17362 Butte Wood chipped planter area between Bidwell Mansion parking area and Gateway Science Museum, Chico. 60 Comment
  JEPS128595  Amaranthus deflexus Lowell Ahart 2017-8-1 21652 Butte Park west of railroad, northeast of the intersection of Virginia Street and Sycamore Street, in Gridley. Comment
  UC1562412  Amaranthus powellii Lowell Ahart 1990-5-28 6500 Butte about 2 1/2 mi NE of East Gridley ( along the edges of Palm Avenue, about 1/12 [sic] mile E of Larkin Road) 30 Comment
  CHSC75961  Amaranthus rudis Lowell Ahart 1999-8-13 8175 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
  CHSC85444  Ambrosia psilostachya R. D. Fischer 2003-11-16 16 Butte Sierra Nevada foothills between Chico and Forest Ranch on edge of hwy 32 at 10 Mile House Rd, (Greengate). The upper most parking area for accessing upper Bidwell Park. 466 Comment
  CHSC97722  Ambrosia psilostachya Lowell Ahart 2007-10-30 14509 Butte On the south side of the water ditch, on the north side of Lower Wyandotte Road, about 2 1/2 miles (air) northeast of Palermo, about 4 1/4 miles (air) southeast of Oroville. 129 Comment
  CHSC42098  Ammannia coccinea Lowell Ahart 1986-11-9 5442 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
  CHSC66358  Ammannia coccinea Vernon H. Oswald 1996-6-20 7829 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U. S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. 33 Comment
  RSA688938  Ammannia coccinea L. Ahart 1986-11-9 5442 Butte About 0.1 mile S of the clay burrow for Oroville Dam, 0.25 mile E of Larkin Road, about 6 miles SW of Oroville. 37 Comment
  SEINET10452865  Ammannia coccinea Lowell Ahart 1990-10-5 Ahart 6632 Butte Below the high water line of Lake Oroville, about 1/8 mile south-west of the Enterprise Boat Launch Area, about 3/4 mile north-west of the Enterprise Bridge across Lake Oroville. Foothill Woodland (destroyed). T19N R6E NW/S6. 229 Comment
  SEINET10497620  Amsinckia eastwoodiae Lowell Ahart 1985-4-1 Ahart 4872 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
  CHSC137  Amsinckia intermedia E. Lusk 1949-5-22 Butte 3 mi. N.W. of Chico. 60 Comment
  CHSC21278  Amsinckia intermedia M. S. Taylor 1974-2-19 39 Butte In fields above and slightly n of Salmon Hole ca. 300 yds e of Upper Bidwell Park Road and ca. 4 mi n of Chico Municipal Golf Course building. 182 Comment
  CHSC31125  Amsinckia intermedia Howard Paul 1980-4-6 3 Butte Along the s rim of Butte Creek canyon, ca. 2.5 mi e of Chico, on the Skyway. 152 Comment
  RSA754453  Amsinckia intermedia L. Ahart 2009-4-17 15545 Butte S slope of a ridge, about 150-200 yards W of Highway 32, near the S boundary, Upper Bidwell park, about 5 air miles NE of Chico. 373 Comment
  CHSC109061  Anagallis arvensis Lowell Ahart; Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17920 Butte On the north side of the path, the path under the bridge, near the intersection of Centennial Avenue and Manzanita Avenue, Lower Bidwell Park. 80 Comment
  CAS-BOT-BC45250  Ancistrocarphus filagineus C. C., Mrs. Bruce 1897-5-1 2111 Butte Fields near Chico Comment
  CHSC98905  Andropogon virginicus var. virginicus L. P. Janeway 2007-12-17 9225 Butte Northern Sierra Nevada Foothills. Along the east edge of Thermalito Diversion Pool (the bed of the Feather River pooled at a constant 68m elevation level), about 370 m north the railroad bridge. 69 Comment
  JEPS83781  Anemone occidentalis V. Oswald and L. Ahart 1988-7-29 3644 Butte ca. 5 mi. (air) s.w. Jonesville (on ridge running e. from peak of Snow Mt., n. brow of ridge) 2103 Comment
  CHSC31898  Anethum graveolens L. Ahart 1975-7-7 854 Butte In garden on good soil; Peter Ahart Ranch, Honcut. 45 Comment
  UC1122893  Angelica breweri P. L. Johannsen 1936-7-21 957 Butte 1 1/2 mi ese of Chaparral House (Lassen National Forest); Lassen National Forest 1645 Comment
  CHSC30775  Angelica californica M. S. Taylor 1980-9-12 3335 Butte W side of Hwy 32, ca. 3 mi n of Forest Ranch, near Forest Ranch Fire Control Station, ca. 5 minute walk w from the Hwy down a dirt rd. 975 Comment
  UC532229  Antennaria rosea Herbert F. Copeland 1934-7-9 Butte Jonesville (region of), near the source of Butte Creek Butte Creek 1828 Comment
  CHSC97232  Anthoxanthum odoratum Lowell Ahart 2007-6-1 13968 Butte In lawn, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 30 Comment
  CHSC113288  Anthriscus caucalis Lowell Ahart 2014-4-9 19342 Butte Bottom of a drying pond, about 100 yards west of the parking area, west end of West Liberty Road, about one mile (air) south of Colusa Highway, about 7 miles (air) southwest of Gridley. 19 Comment
  CHSC1950  Anthriscus caucalis A. Goekler 1929-5-15 Butte Bidwell Park. 60 Comment
  CHSC50018  Anthriscus caucalis Lowell Ahart 1990-4-8 6436 Butte On the east side of Pacific Heights Road, about 3 1/2 miles south-west of Oroville. 33 Comment
  RSA791504  Anthriscus caucalis George K. Helmkamp, E. Helmkamp 2012-4-14 18765 Butte Northwestern Sacramento Valley: entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River 46 Comment
  JEPS95606  Antirrhinum vexillocalyculatum subsp. intermedium Lowell Ahart 1994-10-16 7564 Butte 2 air miles N and 3 1/2 mi E of Forbestown (along S side of dirt road to Forbestown Reservoir, near Woodleaf Creek, 3/4 mi SW of Forbestown Reservoir Dam) 762 Comment
  CHSC82406  Aphanes occidentalis Lowell Ahart 2002-5-7 9645 Butte High banks of a pond, at the beginning of a southeast 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
  CHSC12931  Aphyllon epigalium subsp. epigalium K. D. Cox 1974-6-1 188 Butte Found in yard at 1332 Elliott Rd., Paradise. 609 Comment
  JEPS113176  Apocynum androsaemifolium Lowell Ahart 2007-5-29 13949 Butte On the south side of the Dome Trail, trail leads to the Middle Fork of the Feather River, at 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 844 Comment
  CHSC32153  Apocynum cannabinum L. Ahart 1976-5-27 1133 Butte La Porte Rd, ca. 100 yds above its jct with Robinson Mill Rd, ca. 2 mi sw of Rackerby. 609 Comment
  CAS-BOT-BC392106  Aquilegia formosa Lowell Ahart 1984-6-10 4703 Butte Along the road about 2 miles south-west of the Forbestown Diversion Dam, north-east of Forbestown 700 Comment
  CHSC1432  Aquilegia formosa var. truncata E. Walker 1932-5-9 Butte Feather River Canyon. 609 Comment
  SEINET10448427  Arabis platysperma Mary Susan Taylor 1980-8-2 Taylor 3205 Butte T27N R5E center sec 32, Jonesville quad. Humboldt Peak, N tip of the county. 2155 Comment
  SFV2633  Arbutus menziesii M. L. Vincent 1961-3-30 21 Butte Spense Road near cross street Pearson. Roadside. Comment
  UC463026  Arceuthobium campylopodum E. B. Copeland 1931-7-13 Butte Big Summit Jonesville 640 Comment
  UC600690  Arceuthobium campylopodum E. B. Copeland July 1929 Butte Jonesville 487 Comment
  CAS-BOT-BC27257  Arctostaphylos laxiflora Amos Arthur Heller 1940-2-6 15493 Butte Wagstaff Road near the Neal Road, Paradise. Comment
  SD60289  Arctostaphylos manzanita A. A. Heller 1928-1-17 14473 Butte 1.0 mile below the Ten Mile House east of Chico. Comment
  CAS-BOT-BC38860  Arctostaphylos manzanita subsp. manzanita A. A. Heller 1940-2-4 15488 Butte Neal road west of Paradise just below the Spring House. Comment
  CAS-BOT-BC38867  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 1985-2-17 4839 Butte At Kunkle Res., about 2 miles south of Paradise. 550 Comment
  CAS-BOT-BC38871  Arctostaphylos manzanita subsp. manzanita John Thomas Howell; Lowell Ahart 1976-4-1 51541 Butte In foothill woodland south of Chrokee on road to Oregon City. Comment
  CHSC21775  Arctostaphylos manzanita subsp. manzanita Robert A. Schlising 1974-9-17 3157 Butte Along Hwy 32, 9.4 mi NE of junction with Hwy 99 in Chico. Comment
  CHSC31916  Arctostaphylos manzanita subsp. manzanita M. S. Taylor; E. Pierce 1981-1-29 3374 Butte Cohasset Ridge SW of Cohasset Hwy, ca. 1 mi S of Cohasset. 60 Comment
  JEPS119835  Arctostaphylos manzanita subsp. manzanita Lowell Ahart 2012-3-23 17774 Butte 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. Comment
  RSA178613  Arctostaphylos manzanita subsp. manzanita A. A. Heller 1928-1-23 14474 Butte At the Ten Mile House east of Chico. Comment
  UC1094001  Arctostaphylos mewukka Lewis S. Rose 1955-6-15 55103 Butte 6 mi se Paradise (on Pentz Rd) 426 Comment
  UC726639  Arctostaphylos mewukka A. A. Heller 1942-1-29 16359 Butte on Hwy 32 near Lone Pine Forestry Station (14 mi e of Chico) Comment
  UC726640  Arctostaphylos mewukka A. A. Heller 1942-1-18 16354 Butte one mi above De Sabla Comment
  UC726979  Arctostaphylos mewukka A. A. Heller 1942-1-4 16347 Butte Pentz-Magalia Rd 4 mi below Paradise Comment
  CAS-BOT-BC38532  Arctostaphylos mewukka subsp. truei John Thomas Howell 1967-6-22 42637 Butte Magalia. 701 Comment
  CAS-BOT-BC38555  Arctostaphylos mewukka subsp. truei John Thomas Howell 1976-4-2 51562 Butte About 2 mi. from Paradise on Skyway to Chico. 396 Comment
  CAS-BOT-BC38568  Arctostaphylos mewukka subsp. truei A. A. Heller 1940-2-6 15489 Butte Neal Road, Paradise at the Game Refuge above Bowle's Mansion. Comment
  CHSC586  Arctostaphylos patula L. Stone 1930-3-16 Butte Near West Branch on Humboldt road. 975 Comment
  SEINET2028695 Image available Arctostaphylos patula H. F. Copeland 1932-6-29 a 7 Butte The Summit, Jonesville Comment
  UCD51953  Arctostaphylos truei John Thomas Howell 1975-6-15 51083 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  UCD52628  Arctostaphylos viscida subsp. mariposa J. I. Mallory 1968-7-1 295 Butte 4 miles south of Brush Creek Ranger Station, Plumas National Forest, Butte County, California. 640 Comment
  CAS-BOT-BC47381  Arctostaphylos viscida subsp. viscida John Thomas Howell 1975-6-15 51092 Butte about 2 miles from Paradise on Skyway to Chico 396 Comment
  CHSC107585  Arctostaphylos viscida subsp. viscida Lowell Ahart 2011-7-9 17565 Butte Near a large open area, about 1/4 mile east of Little Bald Rock, about 2 miles (air) southeast of Brush creek, about 15 miles (air) northeast of Oroville. 975 Comment
  UC1121438  Arctostaphylos viscida subsp. viscida J. E. Sowder 1933-6-20 89 Butte 1 1/2 mi se Paradise; Chico Quadrangle Comment
  JEPS98536  Aristida dichotoma Lowell Ahart 2000-8-5 8623 Butte Big Bald Rock, about 3 miles (air) east of Madrone Lake, about 12 miles (air) northeast of Oroville. 993 Comment
  JEPS110513  Aristida oligantha Lowell Ahart 2006-10-13 13504 Butte On the sides of a deep wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/8 miles east of Honcut, about 12 miles southeast of Oroville 33 Comment
  JEPS98523  Aristida oligantha Lowell Ahart 2000-9-17 8692 Butte About 1/4 mile southeast of Little Bald Rock, about 1 1/4 miles (air) northeast of Big Bald Rock, about 4 miles (air) northeast of Madrone Lake, about 13 miles (air) northeast of Oroville. 1066 Comment
  UCD56476  Aristida oligantha Beecher Crampton 1963-9-9 6882 Butte 3.5 miles east of Honcut, La Porte Road. Comment
  CHSC78059  Aristolochia californica Caleb E. Casey 1999-2-4 Butte Upper Bidwell Park, bluffs on south side over Bear Hole. 365 Comment
  HSC65302  Aristolochia californica J. P. Smith 1973-3-22 5917 Butte 2.1 mi. E of junction with Hwy. 99 and the road to Paradise 122 Comment
  UC143064  Aristolochia californica Dr. E. B. Copeland 1903-4-10 3044 Butte Chico Comment
  RSA32335  Arnica dealbata Clarence R. Quick 1945-7-17 45 -57 Butte Big Bar Mt Plumas n.7. Comment
  CAS-BOT-BC146274  Arrhenatherum elatius var. elatius Lowell Ahart 1987-5-27 5719 Butte At the intersection of Big Bend Road and Dark Canyon Road, about 1 mile south of Jarbo Gap. 640 Comment
  CHSC11849  Artemisia douglasiana E. B. Copeland 1930-7-27 484 Butte Jonesville. 1550 Comment
  JEPS110297  Artemisia douglasiana Lowell Ahart 2006-9-11 13273 Butte Gravel bar, south side of the North Fork of the Feather River, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville 431 Comment
  CAS-BOT-BC90281  Artemisia douglasiana Lowell Ahart 1977-9-20 1237 Butte Peter Ahart Ranch, Honcut, on the banks of North Honcut Creek 50 Comment
  SEINET10904995  Artemisia douglasiana Mary Susan Taylor 1979-9-28 Taylor 2198 Butte Butte County line at Hwy 70, between boundry and Arch Rock tunnel; granitic soils and dome outcrop. 488 Comment
  CAS-BOT-BC400634  Asarum hartwegii A. A. Heller 1915-4-12 11809 Butte Near Cohasset Comment
  SEINET10475951  Asarum hartwegii Mary Susan Taylor 1981-4-14 Taylor 3529 Butte T22N R4E sw sec 12. Pulga SW quad. Mixed Coniferous Forest, loamy soil over rocky base, on Ponderosa Way(Rim Rd) ca. 2 mi N of Jarbo Gap on Hwy 70, ca. 20 air mi N of Oroville. 2900 ft. 884 Comment
  CHSC91262  Asarum lemmonii L. P. Janeway; David Toren, Matt Brown, Jamie Tuitele-Lewis 2005-5-24 8395 Butte Northern High Sierra Nevada. Plumas National Forest; south edge of seepy meadow about 200 m east-northeast of Dogwood Creek; 1.9 km (air) east-southeast of Rag Dump. 1134 Comment
  UCD121274  Asclepias cordifolia M. S. Taylor 1980-5-31 2775 Butte E of Coutelenc Rd at its jct with the Skyway. 609 Comment
  CHSC20541  Asclepias eriocarpa M. S. Taylor 1975-6-30 810 Butte Fields on e side of Cohasset Rd, ca. 2 mi n of Chico. 60 Comment
  CHSC11795  Aspidotis densa E. B. Copeland 1929-7-13 328 Butte Jonesville. 1700 Comment
  SEINET10473623  Aster exilis Mary Susan Taylor 1982-10-11 Taylor 5164 A Butte T20N R2E sw sec 33. Along the Midway near a slough just n of Nelson-Shippee Rd, ca. 0.7 mi s of Nelson. Comment
  CHSC69444  Aster radulinus Lowell Ahart 1997-9-6 7892 Butte About 1 1/2 miles north of Oakway, about 3 miles (air) northwest of Flea Mountain, about 3 miles (air) northeast of Sawmill Peak, about 5 miles (air) north of Concow Reservoir. 762 Comment
  CAS-BOT-BC178459  Astragalus gambelianus Lowell Ahart 1981-4-24 2789 Butte Near North Honcut Creek on the Peter Ahart Ranch, about 1 mile north and 3 miles east of Honcut. 50 Comment
  CAS-BOT-BC178465  Astragalus gambelianus A. A. Heller 1916-4-13 s.n. Butte Stilson Canyon east of Chico Comment
  POM16001  Astragalus gambelianus A. A. Heller 1902-5-8 8055 Butte Berry Canyon (near Clear Creek) Comment
  UC1506099  Astragalus gambelianus Robert T. Clausen 1963-3-22 63016 Butte Oroville Sugarloaf Peak, Campbell Hills, Sacramento River drainage (Campbell Hills, se slope Sugarloaf Peak, Sacramento River drainage, Sacramento Valley) 150 Comment
  UC176262  Astragalus gambelianus A. A. Heller 1913-4-7 10728 Butte hills six mi n Oroville; n of Oroville Comment
  CHSC31961  Astragalus pauperculus J. D. Jokerst 1979-5-2 1219 Butte Top of North Table Mt., ca. 200 meters S of Cherokee Rd. 396 Comment
  CHSC42893  Asyneuma prenanthoides L. P. Janeway 1987-6-13 2192 Butte Along Ponderosa Way (Rim Rd) 2.8 mi NE of Jarbo Gap. 883 Comment
  CHSC62099  Asyneuma prenanthoides L. P. Janeway 1993-7-12 4438 Butte Plumas National Forest. About 0.5 mi north of Mountain House; along Rd 22N49 1.2 mi southwest of Fourmile Ridge Road (22N33). 990 Comment
  CHSC11797  Athyrium filix-femina var. cyclosorum E. B. Copeland 1929-7-29 326 Butte Jonesville. 1600 Comment
  JEPS119554  Athysanus pusillus Lowell Ahart 2012-2-22 17748 Butte About 5/8 mile west of Highway 32, about 8 3/4 miles (air) northeast of Chico. Comment
  CAS-BOT-BC168563  Atriplex cordulata Lowell Ahart 1983-9-19 4454 Butte About 1/8 mile south of the Gray Lodge Waterfowl Management Area Headquarters, about 12 miles southwest of Gridley 35 Comment
  CHSC37077  Atriplex heterosperma L. Ahart 1982-9-9 3766 Butte On sides of deep ditch, near water line on bare soil, ca. 100 m n of the check-in station, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 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
  CAS-BOT-BC176606  Atriplex serenana var. serenana Lowell Ahart 1977-7-24 s.n. Butte Gray Lodge, 10 miles southwest of Gridley 30 Comment
  SEINET10517561  Avena barbata Lowell Ahart 1974-4-24 Ahart 433 Butte Along North Honcut Creek on moist sandy soil. Peter Ahart Ranch, Honcut. Foothill Woodland. 150 Comment
  JEPS111348  Azolla filiculoides R. V. Lansdown 2007-4-27 Butte Oroville Wildlife Area, W of Oroville. Complex of deep basins around the car park on the northern margin of the Wildlife Area. Comment
  SEINET10530428  Azolla mexicana Mary Susan Taylor, Lowell Ahart 1982-10-11 Taylor 5162 Butte T17N R2E se/se sec 18. Pennington quad. Graylodge Wildlife Refuge, n side of Rutherford Rd, ca. 0.5 mi e of Penning- ton Rd, ca. 12 mi sw of Gridley. 70 ft. 21 Comment
  CHSC103016  Azolla microphylla Lowell Ahart 2009-10-8 16412 Butte In a deep large ditch, on the east side of the road, about 20 yards east of Parking Lot 13, Gray Lodge Waterfowl Management Area, about 7 miles (air) southwest of Gridley. 19 Comment
  CHSC21176  Baccharis douglasii M. S. Taylor 1975-10-29 971 Butte On N side of Butte Creek, ca. 4 mi E of junc of the Skyway and Humbug Rd. Comment
  UCD129404  Baccharis glutinosa L. Ahart 1981-9-27 3215 Butte Palermo. 100 Comment
  CHSC115409  Baccharis pilularis M. Rogers 2013-5-4 Butte Pine Creek Unit of SRNWR near Hwy 32. 39 Comment
  UCD129444  Baccharis salicifolia subsp. salicifolia L. Ahart 1984-10-14 4814 Butte along North Honcut Creek, ca. 0.75 mile north and 2 miles east of Honcut, on Joie Osgood property, ca. 12 miles south of Oroville. 40 Comment
  CHSC33226  Barbarea orthoceras R. E. Preston 1981-6-11 84 Butte On a gravel bar on n side of Butte Creek, ca. 3.2 km ne of Butte Meadows, near Cherry Hill. 1415 Comment
  SEINET11935024  Bassia hyssopifolia Unknown 1981-1 3222 Butte N side of rd near entrance to Graylodge Waterfowl Mgmt HQ, just W of Pennington Rd, ca 12 mi SW of 35 Comment
  CHSC83278  Bergia texana Lowell Ahart 2002-12-6 10021 Butte On the bottom of a wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles southeast of Oroville. 27 Comment
  UC1562366  Bergia texana Lowell Ahart 1990-8-15 6578 Butte Near McCabe Creek, below the high water line of Lake Oroville, about 1/2 mile south-west of the Enterprise Bridge across Lake Oroville. Comment
  CHSC113131  Bidens frondosa Lowell Ahart 2013-11-17 19259 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
  UCSB63606  Blennosperma nanum Peek, Jeffrey 1982-4-18 Butte Ca. 5 mi. ne of jct. of Hwy. 99 and Skyway, ca. 6 mi. sw of Paradise, ca. 100 yds n of Skyway Comment
  CAS-BOT-BC15943  Boechera breweri subsp. breweri Lowell Ahart 1980-8-2 2520 Butte Humboldt Peak. 2300 Comment
  UCD114352  Boechera breweri subsp. shastaensis Robert E. Preston 1986-4-29 540 Butte ca. 6.5 km n of Oroville, on North Table Mtn. 366 Comment
  SEINET10823515  Bolboschoenus glaucus Lowell Ahart 1982-7-10 Ahart 3675 Butte On dry bare soil on bottom of dry duck pond, 1/4 mi SE of HQ, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 Comment
  JEPS88584  Bolboschoenus maritimus subsp. paludosus Vernon H. Oswald and Lowell Ahart 1996-7-22 8095 Butte US Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River Sacramento River National Wildlife Refuge, Llano Seco Unit (NE corner of Tract 1.1, Sanctuary II) 33 Comment
  CHSC43058  Boykinia major L. P. Janeway 1987-6-26 2321 Butte SW end of Logue Meadows. 1325 Comment
  CHSC43743  Boykinia occidentalis Vernon Oswald 1985-6-17 1839 Butte Bryant Ravine Rd. at Bryant Ravine Creek, 0.2 mi s of the trailhead to Feather Falls. 746 Comment
  CHSC31733  Brachypodium distachyon L. Ahart 1972-5-6 96 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET5541525  Brassica campestris H. S. Gentry, S. Koch 1962-1 19785 Butte Near Richvale. 53 Comment
  CDA3607  Brassica napus L. Ahart 2001-5-1 8739 Butte On the sides of the dirt road east of the large pump, on the south side of Evans-Reimer Road, about 1 mile east of Pennington Road, Gray Lodge Waterfowl Management Area, about 4 miles (air) southwest of Gridley. Comment
  CHSC34595  Brassica nigra R. E. Preston 1981-10-23 151 Butte Between almond orchard and Sacramento Ave., ca. 0.5 km w of Meridian Rd, ca. 8 km w of Chico. 40 Comment
  UC204947  Brassica nigra A. A. Heller 1914-3-13 11199 Butte low hills 8 mi n of Oroville (in many places in the Sacramento Valley); Sacramento Valley Comment
  CHSC35009  Brassica rapa R. E. Preston 1982-3-2 181 Butte Old County Dump site, ne corner of jct of Humboldt Rd and Bruce Rd; ca. 3 mi e of downtown Chico. 86 Comment
  CHSC38038  Brassica rapa R. E. Preston 1982-12-4 368 Butte In a field; n side of River Rd at bend at Bremner Ranch, ca. 7 mi sw of Chico. 33 Comment
  SEINET10971165  Brickellia californica Mary Susan Taylor 1979-9-28 Taylor 2197 Butte Butte County line at Hwy 70, between boundry and Arch Rock tunnel; granitic soils and dome outcrop. 488 Comment
  CHSC89035  Briza maxima A. Peterson 2003-5-6 75 Butte Southeast of Chico, Pentz Rd near jct with Magalia Hwy, on road shoulder. 213 Comment
  SBBG128018  Briza maxima L. Ahart 2010-5-14 16636 Butte W side Hwy 32, just N of the entrance to the Disc Golf Area, upper Bidwell Park, ca. 5 mi (air) NE of Chico 376 Comment
  CAS-BOT-BC145538  Briza minor Lowell Ahart 1980-5-4 2217 Butte Near Hurleton. 600 Comment
  RSA715855  Briza minor L. P. Janeway 2005-3-10 8346 Butte Cascade Range Foothills [error: actually Sierra Nevada foothills] E edge of city of Chico, N side of Humboldt Road 1.8 km NE of Bruce Road. 134 Comment
  CHSC40079  Brodiaea elegans A. A. Heller 1938-5-22 15105 Butte Near Chico airport. Upper Sonoran Life Zone. Comment
  CAS-BOT-BC482200  Brodiaea elegans subsp. elegans Mrs. J. H. Morrison 1932-5-15 s.n. Butte Durham Comment
  CHSC2417  Brodiaea minor R. Carter 1965-6-15 229 Butte Found 0.5 mi. N of Derrick Rd. on Old Cherokee Rd. Along W side of road, North Table Mt., ca. 8 mi. N of Oroville. 335 Comment
  CAS-BOT-BC484557  Brodiaea minor A. A. Heller 1928-6-28 14657 Butte At Butte Meadows Comment
  HSC43122  Brodiaea minor Maralyn O'Meara 1974-4-20 275 Butte Along Pentz Rd. 300 yds. S of the intersection with Clark Rd. 76 Comment
  UCD139154  Brodiaea nana Robert E. Preston 2003-5-11 2129 Butte around 2 miles south of Oroville Airport, on east side of Thermalito Afterbay, along Larkin Road. 30 Comment
  CHSC89881  Brodiaea sierrae L. P. Janeway; B. Castro 2004-6-13 8132 Butte Northern High Sierra Nevada. Along Old Forbestown Road 2.5 road km southeast of Forbestown Reservoir Road; 3.6 air km east of Forbestown; near headwaters of Costa Creek. South-facing slopes. 829 Comment
  CHSC92936  Brodiaea sierrae L. P. Janeway 2005-7-16 8497 Butte Northern High Sierra Nevada. On Rocky Ridge, along Rim Road (Ponderosa Way); about 1.3 km south of Batchelor Point. Near ridgetop. 927 Comment
  RSA712796  Brodiaea sierrae L. P. Janeway 2005-6-26 8428 Butte South-facing slope 0.4 km. south of top of Batchelor Point, 0.6 km. east of top of Rocky Ridge and Rim Road (Ponderosa Way). 945 Comment
  SEINET10662690  Bromus carinatus var. carinatus Lowell Ahart 2007-5-29 Ahart 13943 Butte T21N, R6E, Section 28. On the south side of the Dome Trail, trail leads to the Middle Fork of the Feather River, at the trailhead which is 3/10 mi E of Bean Creek Road, about 2 miles (air) NE of Big Bald Rock, about 16 mi (air) NE of Oroville. 844 Comment
  CAS-BOT-BC156030  Bromus diandrus Peter H. Raven 1953-5-9 5430 Butte 8 miles from Bangor on Oroville Road. Comment
  CHSC56624  Bromus diandrus T. B. Devine 1980-3-10 605 Butte Chico Sewage Treatment Plant. Comment
  UCR237322  Bromus diandrus George K. Helmkamp, E. A. Helmkamp 2012-4-14 18745 Butte Northern Sacramento Valley, Robinsons Corner, Simpson Rd, just east of junction of East Gridley Road and CA-70 23 Comment
  JEPS113901  Bromus inermis subsp. inermis L. P. Janeway 2007-7-23 9121 Butte Northern High Sierra Nevada; Plumas National Forest; just above a logging spur road just above Road 21N25 in the southeastern corner of Watson Ridge, 1.0 km N-NE of the mouth of Kenebeck Creek at Fall River and Nelsons Crossing. 1128 Comment
  CHSC74912  Bromus laevipes E. Hubert 1996-6-24 Butte Ca 6 air mi NE of Paradise, ca 2 mi NNE of Concow Reservoir and 200 ft W of large bend in Concow Rd, 0.5 mi S of its jcn with Ponderosa Way (Rim Rd). Serpentine outcrop. 883 Comment
  CHSC86854  Bromus laevipes L. P. Janeway; John Hunt 2003-5-22 7793 Butte Northern Sierra Nevada Foothills. Northeast-facing slope between Lime Saddle Campground and West Branch Feather River arm of Lake Oroville. 287 Comment
  RSA712951  Bromus madritensis L. Ahart 2006-5-10 12622 Butte 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 Burdees bar, about 2 1/2 miles (air) southwest of Pulga. Comment
  JEPS106317  Bromus orcuttianus Lowell Ahart 2004-6-22 11123 Butte On the east side of Doe Mill Road, about 1 mile southeast of the bridge across Butte Creek, about 2 1/2 miles (air) southeast of Forest Ranch, about 5 miles (air) southwest of Stirling City 713 Comment
  CHSC38798  Bromus racemosus Vernon Oswald 1983-4-9 314 Butte Upper Bidwell Park, Chico, on the north rim at the level of Horseshoe Lake. 152 Comment
  HSC93416  Bromus tectorum L. Ahart 1995-5-30 7585 Butte S of Beatson Hollow, about 3/4 mi. NW of Cherokee Rd., North Table Mtn., 7 mi. N of Oroville 305 Comment
  CAS-BOT-BC18158  Bulbostylis capillaris J. D. Jokerst 1980-7-18 994 Butte Top of North Table Mountain, ca. 200 meters northwest of junction of Cherokee Road and the east edge of Table Mountain. Comment
  CHSC107588  Bulbostylis capillaris Lowell Ahart 2011-7-9 17564 Butte Area of almost bare rock, about 1/4 mile east of Little Bald Rock, about 2 miles (air) southeast of Brush creek, about 15 miles (air) northeast of Oroville. 1009 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
  CHSC3559  Calandrinia ciliata R. D. Briggs 1966-3-6 68 Butte Road side, 1/4 mile due west of golf course club house in Bidwell Park, Chico. 91 Comment
  CHSC2396  Calandrinia ciliata var. menziesii R. Carter 1965-3-13 163 Butte Found ca. 7 mi E of Oroville at 6120 W. S. R., on S side of house beside water faucet. 274 Comment
  CHSC21073  Callitriche heterophylla var. bolanderi M. S. Taylor 1975-4-26 529 Butte In small pool on e side of Kunkle Reservoir, ca. 500 yds e of Pentz-Magalia Hwy, ca. 1 mi s of Paradise. Comment
  CHSC30988  Callitriche marginata M. S. Taylor 1980-3-15 2379 A Butte Ca. 1/4 mi s of Pentz Rd, ca. 1/8 mi e of Hwy 99, ca. 15 mi s of Chico. 54 Comment
  CHSC3593  Calocedrus decurrens Susan Carrauthers 1966-2-22 18 Butte Table Mountain Golf Course (9th Hole). Ca. 5 mi E. of highway 99E. On Oroville Lateral Road. S. W. of city of Oroville. Comment
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Aug 28 2018
  JEPS115855  Calocedrus decurrens Lowell Ahart 2009-11-19 16548 Butte About 80 yards southeast of the gate, about 70 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  LA6444  Calocedrus decurrens E. B. Copeland; 1931-7-28 sn Butte Jonesville, W of North Willow Creek 1650.0 Comment
  NY18988  Calocedrus decurrens E. B. Copeland 1931-7-28 603 Butte This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  SBBG28817  Calocedrus decurrens E. B. Copeland 1931-7-28 Butte Jonesville, W of North Willow Crk 1650 Comment
  CHSC3353  Calochortus albus Robert L. Smith 1966-4-20 19 Butte Paradise, 5 miles SE of post office. Comment
  CAS-BOT-BC487514  Calochortus albus A. A. Heller; H. E. Brown 1902-5-7 5484 Butte Berry Canyon (Near Clear Creek) Comment
  SEINET10469583  Calochortus coeruleus Mary Susan Taylor 1980-4-18 Taylor 2503 Butte T23N R3E ne sec 27 Paradise quad. Ca. 1 mi S of Nimshew, ca. 1/4 mi E of Nimshew Road; Yellow Pine Forest. With J.D. Jokerst. 610 Comment
  CHSC34488  Calochortus luteus J. D. Jokerst 1979-5-21 252 Butte NE corner of jct Pentz-Magalia Hwy and Pentz Rd. Comment
  CHSC100830  Calochortus monophyllus F. J. Fuller 1982-4-18 24 Butte Ca. 20 ft sw of Crown Pt Rd, 1.0 mi e of Hwy 32, 11 mi nw of Chico. 347 Comment
  CHSC44982  Calochortus monophyllus E. Ray Latham 1988-4-19 Butte Population Cohasset Ridge, 14 km ne of Chico municipal airport. 500 Comment
  JEPS14191  Calochortus monophyllus Rimo Bacigalupi with G. T. Robbins and Fran Chisaki 1956-4-19 5605 Butte 0.7 mi below Oroville-Concow road junction with Yankee Hill road (along Oroville-Concow road) 563 Comment
  UC565381  Calochortus monophyllus Helen Hedges 1937-5-22 Butte near Enterprise (Midas Mine); South Fork of the Feather River 396 Comment
  UC648384  Calochortus monophyllus Marion Ownbey and Ruth P. Ownbey 1938-7-13 1730 Butte 15 mi ne Chico Comment
  UCR190818  Calochortus monophyllus Ken Osborne 2007-5-13 s.n. Butte Sierra Nevada Foothills, along Ponderosa Way at Mud Creek, c. 1.5 mi. SE of Cohasset 701 Comment
  SEINET10469602  Calochortus monophyllus Lowell Ahart 1985-3-22 Ahart 4849 Butte About 1/2 mile north-east of the West Branch Bridge across Lake Oroville, 1/4 mile east of Highway 70, north of Oroville. Comment
  CAS-BOT-BC493343  Calochortus superbus Lowell Ahart 1980-5-25 2318 Butte Along Swedes Flat Road, near Bangor Comment
  CHSC116973  Calochortus tolmiei Danielle Gee 2013-4-27 Butte Detlow Road, about 20 yards off Hwy 70, along road cut. 642 Comment
  CHSC51943  Calochortus tolmiei J. Marr 1988-3-19 6 Butte 5 ft. on E side of Deadwood Rd, 1/4 mi N from Hwy 70, 20 mi N of Oroville. Comment
  UC843673  Calochortus tolmiei A. A. Heller 1938-4-23 15055 Butte about 20 mi from Oroville (along the Feather River Highway near the Yankee Hill road) Comment
  SEINET10469608  Calochortus tolmiei Lowell Ahart 1985-5-15 Ahart 5000 Butte 1/8 mile east of the dirt road, about 1 1/2 miles north-east of Concow of Reservoir. Comment
  CAS-BOT-BC175757  Caltha leptosepala E. B. Copeland 1930-6-1 639 Butte Jonesville. In meadows by North Willow Creek 1550 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
  CAS-BOT-BC273290  Calycadenia fremontii G. D. Carr 1978-7-7 792 (1978) Butte NE of Chico, Upper Bidwell Park (Devils Kitchen), 4.6 mi NE of Manzanita Ave on Upper Bidwell Canyon Rd via Wildwood Ave 232 Comment
  CAS-BOT-BC270004  Calycadenia multiglandulosa Lowell Ahart 1989-7-4 6363 Butte Near a mined over area S of Oregon Gulch Road, about 0.25 mile NW of the Cemetery, about 1.25 miles W of Rocky Point, about 10 miles E and 3 miles N of Oroville 335 Comment
  UCD129745  Calycadenia multiglandulosa Gerald D. Carr 1981-9-26 1161 Butte around 3 miles northeast of Honcut, on the Lowell Ahart Ranch. Comment
  CHSC29833  Calycadenia oppositifolia M. S. Taylor; R. S. Schlising, L. Ahart 1980-5-31 2753 Butte Kunkle Reservoir, on E side of Pentz-Magalia Hwy, ca. 3 mi S of Paradise. 441 Comment
  CHSC44955  Calycadenia oppositifolia Pauleen Broyles 1988-4-19 1107 Butte Lower Nance Canyon. 90 Comment
  POM53155  Calycadenia oppositifolia A. A. Heller, Brown 1902-5-9 s.n. Butte Berry Canyon (near Clear Creek) from type region Comment
  SBBG128090  Calycadenia oppositifolia J. Dittes, L. Ahart, S. Green, J. Guardino 2003-5-27 2003 -32 Butte Cascade Range foothills, upper Bidwell Park, ca. 6.7 air-mi NE of Chico, 2.5 air-mi NE of Horseshoe Lake, on cut rd bank and slope on N side of main rd, just W of Parking Lot-R 228 Comment
  UC1971666  Calycadenia oppositifolia 1977-7-6 2032 Butte just SW of Bloomer Hill Lookout on Encina Grande Road, 4.6 mi from jct with Quincy/Oroville Hwy (very near GDC 699) 831 Comment
  UC1119094  Calycadenia spicata C. G. Albertus 1935-6-15 29 Butte 2 mi w of Themalte; Chico 45 Comment
  SEINET10475224  Calycadenia spicata Mary Susan Taylor 1979-5-6 Taylor 1998 A Butte Peter & Lowel Ahart Ranch, Honcut; Valley Grassland. Comment
  CHSC28496  Calycadenia truncata M. S. Taylor 1979-7-22 2166 Butte Pulga bridge, on N side of trail leading from NE side of Pulga bridge over Hwy 70, ca. 27 mi N of Oroville. 487 Comment
  SEINET10475217  Calycadenia truncata Mary Susan Taylor 1979-6-12 Taylor 2303 Butte Magalia serpentine area down to Feather River. With J.D. Jokerst & L. Ahart. 671 Comment
  CAS-BOT-BC275394  Calycadenia truncata var. truncata Walter S. Lennon 1974-1-1 s.n. Butte Near Pulga Comment
  CAS-BOT-BC275387  Calycadenia truncata var. truncata Lowell Ahart 1980-7-20 2468 Butte Near the Suspension Bridge, Lake Oroville 330 Comment
  UC725412  Calycanthus occidentalis A. A. Heller 1938-5-28 15122 Butte 25 mi from Oroville (on the Feather River Highway) Comment
  UC203617  Calyptridium monospermum A. A. Heller 1914-6-24 11512 Butte w side of Sierra Nevada at West Branch; Sierra Nevada 1036 Comment
  CHSC37266  Calyptridium umbellatum L. Ahart 1982-6-15 3559 Butte On a lava cap, ca. 1.5 mi e of Camp 18, ca. 8 mi e of Feather Falls. 1000 Comment
  CAS-BOT-BC32307  Calystegia atriplicifolia subsp. buttensis John Thomas Howell 1955-6-14 30471 Butte De Sabla Comment
  CHSC33652  Calystegia atriplicifolia subsp. buttensis R. A. Schlising 1975-6-20 3167 Butte N of Magalia and NE of De Sabla, just NE of junction of Skyway and Humbug/Humboldt Roads. 853 Comment
  CHSC103117  Calystegia occidentalis subsp. occidentalis Lowell Ahart 2009-5-30 15775 Butte On the north side of Ten Mile House Road, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 379 Comment
  CHSC27918  Calystegia occidentalis subsp. occidentalis M. S. Taylor 1978-7-19 1728 Butte Cherry Hill Campground, on s side of Old Humboldt Rd, ca. 2 mi sw of Jonesville. 1524 Comment
  CHSC62105  Calystegia occidentalis subsp. occidentalis L. P. Janeway 1993-7-2 4428 Butte 1.3 mi south-southwest of Hungry Hunt Peak; along Rd 22N84 2.6 mi from Rd 23N28 and 1.8 mi past its crossing of Stony Creek. 993 Comment
  CDA42340  Campanula prenanthoides L. Ahart 2004-7-11 11247 Butte On the southeast edge of Paradise Lake, about 3/4 mile northeast of the picnic area, about 1 mile northeast of Paradise Dam, about 4 miles (air) southwest of Stirling City. Comment
  SEINET10463241  Campanula prenanthoides Carter 1965-7-6 Carter 276 Butte 1.4 miles north of Mountain House on Oroville-Quincy road on east bank above road 914 Comment
  SEINET10840318  Campanula prenanthoides Taylor 1978-7-18 Taylor 1673 Butte On west side of Highway 32 on edge of Yellow Pine Forest, in dry open area, about 0.25 mile north of Forest Ranch 718 Comment
  CDA34160  Capsella bursa-pastoris L. Ahart 2009-4-3 15526 Butte Chico: East of the Cedar grove Parking Area in Lower Bidwell Park. Comment
  UCD114130  Capsella bursa-pastoris A. A. Heller 1914-3-17 11204 Butte Chico, in a garden. Comment
  CHSC3628  Cardamine californica John Francis 1966-2-28 51 Butte Upper Bidwell Park, at end of main road beside creek. Comment
  CHSC498  Cardamine californica P. Delaplane 1965-3-2 66 Butte Found ca. 100 yds. from covered bridge on Honey Run Rd. ca. 8 mi. SE of Chico. 304 Comment
  UCR51788  Cardamine californica H. F. Copeland 1929-5-9 1251 Butte Jonesville 1524 Comment
  JEPS116041  Cardamine oligosperma Lowell Ahart, John Dittes 2009-3-20 15505 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
  SEINET10448555  Cardamine oligosperma Mary Susan Taylor 1981-3-16 Taylor 3414 Butte T21N R4E southcenter sec 16; Cherokee q. E side of Truex Rd, ca. 0.5 mi s of its jct with Hwy 70, ca. 7 mi n of Oroville. Foothill Woodland; 1000 ft. 305 Comment
  SEINET8205866  Cardamine oligosperma A. A. Heller 1914-3-12 Butte in canon of Big Chico creek. 69 Comment
  SEINET8370186  Cardamine oligosperma John Dittes, Josephine Guardino 1991-4-19 338 Butte Cascade Range Foothills; North Table Mountain; ca. 5.1 airmiles north of Oroville City Hall, ca. 4.2 air-miles south by southwest of Cherokee, ca. 3.8 air-mile east of intersection of State Hwy 99 and State Hwy 149. 366 Comment
  JEPS127001  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2016-5-24 20843 Butte About 300 yards southwest of the intersection of Loma Rica Road and La Porte Road, about 3 1/2 miles (air) northeast of Honcut. Comment
  SJSU15296  Carex Lisa Morton 2002-3-31 18 Butte Upper Bidwell Park along Middle Trail 50 Comment
  CHSC52284  Carex abrupta L. P. Janeway 1987-6-26 2312 Butte Above Camp Cr, 2.5 mi E of Granite Ridge along road to Lynch and Logue Meadows. 1365 Comment
  SEINET7468090 Image available Carex amplifolia Robert F. C. Naczi, Anton A. Reznicek 2006-8-1 11399 Butte Jonesville, along Jones Creek, just NE of the historic Jonesville Inn 1535 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
  CHSC36066  Carex angustata J. D. Jokerst; R. A. Schlising 1982-6-4 1590 Butte Concow Creek in an open meadow at its headwaters. 1097 Comment
  CHSC53752  Carex angustata L. P. Janeway; C. A. Janeway 1986-9-13 1844 Butte Just east of Scotts John Cr above Rd 26N27 (road connecting Humboldt and Humbug Rds). 1737 Comment
  CAS-BOT-BC18054  Carex athrostachya E. B. Copeland 1928-7-28 607 Butte Jonesville. 1700 Comment
  SD469  Carex athrostachya E. B. Copeland 1929-7-28 607 a Butte Jonesville; forming large dense tufts by irrigation ditch. 1550 Comment
  SEINET10644691  Carex athrostachya A. Arthur Heller 1915-6-25 Heller 12018 Butte Chico Meadows in the Sierra Nevada, wet places. 1219 Comment
  CAS-BOT-BC19200  Carex barbarae Lowell Ahart 1980-5-12 2257 Butte Honcut. Peter Ahart Ranch. 50 Comment
  CHSC38895  Carex barbarae Vernon Oswald 1983-6-2 611 Butte Upper Bidwell Park, Chico, on Yahi Trail between Brown's Hole and the e end of the park. Growing on a rocky slope near Chico Creek. 198 Comment
  HSC87065  Carex barbarae L. P. Janeway, Heidi Wienert, Scott George 1988-7-27 3092 Butte Just W of Murphy Slough and Golden State Island near the Sacramento River 38 Comment
  CHSC45075  Carex bolanderi Vernon Oswald 1987-5-12 2392 Butte Butte Creek Reserve on the s side of Butte Creek, n of the Skyway, between Crouch Ditch dam and the double set of transmission lines. 80 Comment
  CHSC107569  Carex cyrtostachya Lowell Ahart 2011-8-19 17635 Butte On the south side of a good forest road, on the east side of Know-northing Creek, in low area on the north side of Lumpkin Ridge Road, about 1/2 mile southwest of the intersection of Lumpkin Ridge Road, County Road and road to Cascade, about 5 miles (air) northeast of Feather Falls. 1252 Comment
  CHSC102834  Carex densa Lowell Ahart 2009-6-3 15818 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 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 232 Comment
  CHSC52850  Carex densa L. P. Janeway 1988-5-19 2675 Butte Canyon of Big Chico Creek; seep along Ponderosa Way 1.2 mi NW of the creek crossing. 426 Comment
  CHSC52851  Carex densa L. P. Janeway 1987-5-7 2025 Butte Edge of Cottonwood Rd 2.2 mi W of Table Mtn Rd at Cottonwood Cr. 48 Comment
  CHSC71195  Carex densa Lowell Ahart 1998-6-9 7989 Butte Southwest of the lone oak tree, northwest of the cow chute along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  JEPS120129  Carex divulsa subsp. divulsa Lowell Ahart 2012-5-25 18113 Butte Northwest of the intersection of W. Frances Willard Avenue and Arcadian Avenue, one block south of Chico High School, Chico. Comment
  CHSC43902  Carex feta L. P. Janeway 1987-6-5 2132 Butte Along French Cr Rd 1.4 mi NE of OroQuincy Hwy and Stanwood Saddle. 929 Comment
  CAS-BOT-BC19999  Carex feta L. P. Janeway 1988-7-2 2954 Butte Upper reach of Brush Creek, about 1.5 mile S of town of Brush Creek. 952 Comment
  CHSC37065  Carex fracta L. Ahart 1982-9-29 3837 Butte On banks of Pinkard Creek, ca. 1.5 mi n of Lost Creek Reservoir Dam, ca. 3.5 mi nw of Strawberry Valley. 1200 Comment
  CHSC110987  Carex gracilior Lowell Ahart 2012-5-17 18085 Butte On both sides of the horse trail, 10 to 50 feet north of the poor dirt road, about 100 feet south of Larch, south of Vallombrosa Avenue, Lower Bidwell Park, Chico. 73 Comment
  JEPS87705  Carex gracilior Lowell Ahart 1994-4-29 7291 Butte about 2 1/2 mi n and 2 3/4 mi e Honcut (on the w side of North Honcut Creek, about 12 mi se of Oroville); North Honcut Creek 54 Comment
  CHSC99389  Carex heteroneura Robert F. C. Naczi; Lawrence P. Janeway 2004-7-23 10517 Butte Ca. 6.4 mi SE of village of Butte Meadows, along Philbrook Creek, E of E end of Philbrook Reservoir. 1694 Comment
  CHSC43919  Carex heteroneura var. heteroneura L. P. Janeway 1986-9-1 1836 Butte NE-facing slope above Philbrook Reservoir. 1798 Comment
  CAS-BOT-BC28191  Carex hirtissima Lowell Ahart 1982-6-1 3529 Butte A little S of the intersection of Black Bart Road and forbestown Road, W of Forbestown. 750 Comment
  CHSC42828  Carex hirtissima L. P. Janeway 1987-5-10 2045 Butte Mdw at jct of Skyway and Doe Mill Rd/Humbug Rd, just N of Da Sabla Reservoir. 838 Comment
  SEINET4286136 Image available Carex hoodii L. Janeway, Gog, L 2008-1 3194 C Butte Just east of Philbrook Resevoir. Comment
  CHSC52251  Carex infirminervia L. P. Janeway; R. A. Schlising 1988-7-22 3058 Butte Upper southeast slope of Coon Hollow, near beginning of Coon Hollow Creek. 1920 Comment
  CHSC44119  Carex jonesii L. P. Janeway 1987-6-26 2292 Butte At Rag Dump. 1173 Comment
  UC600694  Carex jonesii H. F. Copeland 1929-6-10 1245 Butte Jonesville 1524 Comment
  CAS-BOT-BC7777  Carex laeviculmis Lowell Ahart 1984-7-19 4746 Butte about 1 1/2 miles south-east of Bald Mountain, 3/4 mile west of Oak Point, about 4 miles north-east of Stirling City, CA 1500 Comment
  CHSC45747  Carex laeviculmis L. P. Janeway 1988-6-19 2839 Butte 3.3 mi N of Stirling City towards Inskip along logging rd 0.2 mi W of The Skyway. 1219 Comment
  SEINET4286003 Image available Carex laeviculmis L. Janeway, Gog, L 2008-1 3189 C Butte Near Cornelia Lott Sank Memorial Spring Comment
  HSC87071  Carex laeviculmis L. P. Janeway 1987-6-13 2203 Butte Edge of creek at road crossing, road to Mayaro, 1 mi. E of Concow Rd. 1107 Comment
  POM218980  Carex lemmonii E. B. Copeland 1929-7-5 610 Butte Jonesville. 1500 Comment
  JEPS121959  Carex limosa Lowell Ahart 2014-7-7 19583 Butte In the bog, Coon Hollow, about 2 miles (air) north of Philbrook Reservoir. Comment
  CAS-BOT-BC32200  Carex multicaulis Lowell Ahart 1982-6-4 3537 Butte Ca 8 mi E of Feather Falls, 1.5 mi E of Camp 18. 1000 Comment
  CHSC111389  Carex multicaulis Lowell Ahart 2012-4-30 17923 Butte Near a small drainage, north of the meadow, southwest of Ten Mile House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico, south part of Upper Bidwell Park. 268 Comment
  CAS-BOT-BC32161  Carex multicaulis L. P. Janeway 1987-6-13 2191 Butte Pulga quad, along Ponderosa Way (Rim Road) 2.5 mi NE of Jarbo Gap. 883 Comment
  CHSC89037  Carex nebrascensis L. P. Janeway; B. Castro 2004-8-15 8245 Butte High Cascade Range. At Cold Springs; north side of Humbug Summit Road halfway between Willow Creek and Humbug Summit. 1975 Comment
  CHSC44102  Carex nervina L. P. Janeway 1987-6-27 2341 Butte Along Little Kimshew Cr 0.7 mi N of the Concow Rd via dirt rd. 1508 Comment
  CHSC44696  Carex nervina L. P. Janeway; R. A. Schlising, B. Castro 1988-7-30 3141 Butte SW-facing slope above Coon Hollow; near dirt rd 1.2 mi W of its high point near the county line. 1950 Comment
  CHSC84720  Carex nudata L. P. Janeway 2003-5-11 7783 Butte High Cascade Range. Along west edge of Butte Creek, 700 m south-southwest of the Ponderosa Way bridge (Forks of Butte); just upstream of the diversion structure. 588 Comment
  SEINET8989731 Image available Carex pachystachya Unknown 2003-1 7781 Butte Sacramento Valley. North end of Chico; along Sycamore Creek 90 m west of Cohasset Road bridge. Richardson Springs 7.5' quad. Comment
  CHSC111957  Carex praegracilis Lowell Ahart 2012-5-23 18108 Butte Along the horse trail, north ofTable 32, aabout 50 yards south of Vallombrosa Avenue, southwest of Crister Ave., Lower Bidwell Park, Chico. 70 Comment
  CHSC54373  Carex praegracilis M. Bailey 1991-4-19 568 Butte In back yard of 3807 West Branch Lane, ca 1/3 mi w of Clark Road. Property bordering West Branch of Clear Creek. 109 Comment
  CHSC44948  Carex simulata L. P. Janeway; R. A. Schlising, B. Castro, Pauleen Broyles 1987-7-19 2504 Butte Coon Hollow, 1.0 mi SE of the Humbug Summit Rd. Mdw on north side of the creek. 1661 Comment
  SEINET4289435 Image available Carex simulata L. Janeway, Gog, L 2008-1 3198 A Butte Pat's Meadow. Along Butte Creek, 0.6 mi. W of Cherry Creek Campground. Comment
  SEINET8573590 Image available Carex specifica L. Janeway, Gog, L 2008-1 3200 Butte Scott's John Creek. Intersection with Rd 26N27. Comment
  CHSC45043  Carex subfusca Vernon Oswald 1983-7-19 878 Butte Philbrook Rd. at the bridge crossing the West Branch of the Feather River. 1554 Comment
  RSA4408  Carex subfusca E. B. Copeland 1929-7-20 611 Butte Jonesville. 1500 Comment
  SEINET10750075  Carex subfusca Lawrence P. Janeway 1987-7-4 Janeway 2425 Butte T25N, R4E, Kimshew Point quad NE1/4 of sec. 36. Seepy area along road to Jones Meadow 9.6 mi from Inskip. NW-facing slopes above Last Chance Cr. 1676 Comment
  SEINET7486553 Image available Carex texensis Peter F. Zika 2010-1 24982 Butte N bank of Big Chico Creek, near Holt Hall, campus of California State University Chico, S of Mansion Avenue, Chico Comment
  CHSC45065  Carex utriculata Vernon Oswald 1983-7-6 833 Butte Near Humboldt Rd. 3.4 mi n-e of Butte Meadows. 1432 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
  CHSC45067  Carex vesicaria Vernon Oswald 1987-6-23 3020 Butte High Lakes Rd. 4.8 mi (odometer) n of Philbrook Rd. 1889 Comment
  CHSC65602  Carex vesicaria L. P. Janeway 1995-8-5 4889 Butte Vernal pool on north side of Humbug Summit Road about 1.2 mi northeast of Snag Lake. 1801 Comment
  CHSC43868  Carex whitneyi Vernon Oswald 1983-8-17 985 Butte Humboldt Summit on Humboldt Rd. n-e of Jonesville at the jct. of Butte, Tehama, and Plumas Counties. 1999 Comment
  JEPS122426  Carex xerophila Peter F. Zika with L. P. Janeway 2012-5-16 25868 Butte Magalia Serpentine, Coutolenc Road 0.1 miles N of Skyway Road. Northern Sierra Nevada Highland (n SNH) Comment
  CHSC116953  Carpenteria californica Matthew Forster 2013-4-17 Butte City of Chico, corner of E. 3rd Ave. and Oleander Ave. 60 Comment
  CAS-BOT-BC249106  Castilleja affinis H. E. Brown 1897-5-1 205 Butte Near Clear Creek Comment
  CHSC111969  Castilleja affinis subsp. affinis Lowell Ahart 2012-6-2 18127 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. 286 Comment
  CAS-BOT-BC249585  Castilleja applegatei subsp. pinetorum A. A. Heller 1917-7-26 12838 Butte Butte Meadows 1280 Comment
  CDA13873  Castilleja applegatei subsp. pinetorum G. F. Hrusa, T. D. Wilfred 1997-5-7 13731 Butte Sierra Nevada; above Little Butte Creek, N of Magalia. Immed. E of Holmwood Drive. Comment
  CHSC39496  Castilleja applegatei subsp. pinetorum Loweel Ahart 1983-6-21 4072 Butte Along Bloomer Hill Road, about 3/4 mile west of Oroville Quincy Highway, about 15 miles north-east of Oroville. Section 6. 425 Comment
  CHSC75541  Castilleja applegatei subsp. pinetorum G. F. Hrusa; T. D. Wilfred 1997-5-7 13731 Butte Northern California. Sierra Nevada. Above Little Butte Creek, N of Magalia. Immed. E of Holmwood Drive. [Lat./Long. on label is '39 51 N, 121 34 W']. 720 Comment
  UC1012161  Castilleja applegatei subsp. pinetorum F. W. Pennell and A. A. Heller 1940-6-5 25685 Butte above Oroville (Route 24, along the Feather River); Lassen National Forest, Feather River 548 Comment
  SEINET10549337  Castilleja applegatei var. fragilis Mary Susan Taylor 1978-7-18 Taylor 1701 Butte On top of Humboldt Peak, at Humboldt Summit, on Butte-Tehama County line. 2159 Comment
  SEINET10549341  Castilleja applegatei var. fragilis Mary Susan Taylor 1981-6-19 Taylor 3957 Butte T22N R5E ne sec 6. Pulga quad. On serpentine, N side of Feather River Hwy 70, at NW end of Pulga bridge and along Pulga Rd ca. 1/4 mi, ca. 20 mi NE of Oroville. Open & dry weathered reddish serpentine. 1600 ft elev. 488 Comment
  CHSC1811  Castilleja attenuata P. Delaplane 1965-4-6 5 Butte Along W. side of Cohasset Rd. ca 1/4 mi. S.W. of intersection of Cohasset Rd. and Keefer Rd., Chico. 152 Comment
  CDA41336  Castilleja attenuata T. C. Fuller 1958-4-15 3804 Butte 1 mile south of Oroville. 0 Comment
  CHSC43155  Castilleja campestris subsp. campestris R. A. Schlising 1979-4-15 3368 Butte Richvale vernal pools. 1/4 mile S of jct Hwy 162 (E to Oroville) and Hwy 99; along latter and across from Thermalito Afterbay. Comment
  CHSC115264  Castilleja lacera Lowell Ahart 2015-5-27 20193 Butte In a small dry meadow, about 100 yards south of the intersection of Forbestown Road and Black Bart Road, about 3 miles (air) southwest of Forbestown, about 11 miles (air) east of Oroville. 752 Comment
  CHSC38712  Castilleja lacera Vernon Oswald 1983-4-18 341 Butte Upper Bidwell Park, Chico, along the trail ca. 200 ft below (south of) the north rim at the power lines. 213 Comment
  JEPS80632  Castilleja lacera M. S. Taylor 1980-5-15 2624 Butte ca 0.25 mi e Cohasset Rd. (ca 9 mi ne of Chico); Cohasset Ridge 396 Comment
  CHSC31932  Castilleja miniata J. D. Jokerst; L. Ahart, M. S. Taylor 1980-8-2 1043 Butte Immediately N of and adjacent to the summit of Humbolt Peak, northernmost portion of Butte Co. 2133 Comment
  SEINET7072993  Castilleja rubicundula subsp. lithospermoides A. G. Vestal 1963-5-30 s.n. Butte About 15 miles east of Forbestown on the Forebestown Road. UTM Zone 10, 650845mE, 4376263mN. Coordinate datum: NAD27). Comment
  SBBG28504  Ceanothus cordulatus E. B. Copeland 1929-7-14 Butte Jonesville 1550 Comment
  CHSC20961  Ceanothus cuneatus M. S. Taylor 1974-3-19 87 Butte On creek side of Humbug Road, in vicinity of Honey Run Covered Bridge. Comment
  CHSC3262  Ceanothus cuneatus M. L. Hillier 1966-3-4 Butte In grassy earth along Cohasset rd. about 200 yds. s. of Rock Creek Bridge. Comment
  SEINET10493628  Ceanothus cuneatus Mary Susan Taylor 1975-4-26 Taylor 523 Butte Kunkle Reservoir, ca. 500 yds E of Pentz-Magalia Hwy, ca. 1 m SE of Paradise. With Orthocarpus erianthus, Centaurea solstitus, Lupinus bicolor, Typha latifolia. 610 Comment
  CAS-BOT-BC50781  Ceanothus integerrimus A. A. Heller 1928-4-30 14536 Butte Along the Neal Road about 3 miles below Paradise Comment
  RSA399895  Ceanothus integerrimus M. M. Boney 1897-1 s.n. Butte [No location data on label] Comment
  RSA300946  Ceanothus lemmonii D. C. Michener 1982-7-28 4141 Butte 4.4 miles SE of jct with 32 on Garland road, 3.1 miles NW of jct of Powellton road and Skyway road near De Sabla Comment
  UC202361  Ceanothus prostratus H. M. Hall 1914-7-31 9822 Butte Humboldt Road 1066 Comment
  UC1071460  Ceanothus velutinus C. G. Albertus 1933-7-25 49 Butte just s Thompson's; Chico Quadrangle Comment
  JEPS120143  Cedrus deodara Lowell Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-10 18023 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, about 1/10 miles west of Peterson Drive, Lower Bidwell Park, Chico. Comment
  UC1609220 Image available Centaurea jacea Lowell Ahart 1993-8-8 7154 Butte w side of La Porte Road about 2 mi sw Clipper Mills 1066 Comment
  CHSC293  Centaurea melitensis M. Roberson 1956-6-4 Butte Near Paradise along Skyway. 548 Comment
  UC894388  Centaurea melitensis A. A. Heller 1916-4-13 12323 Butte e of Chico (Stilson Canon); Stilson Canon Comment
  UCD130049  Centaurea melitensis A. A. Heller 1916-4-13 12323 Butte Stilson Canyon east of Chico. Comment
  UC1562423  Centaurium muehlenbergii Lowell Ahart 1990-6-16 6511 Butte on the e side Forbestown Reservoir (at the Forbestown Generator, on the e side of the dirt road) 487 Comment
  CHSC38448  Centaurium tenuiflorum Vernon Oswald 1983-6-7 643 Butte Upper Bidwell Park, Chico, ca. 400 ft n of Upper Park Rd. at Diversion Dam. 134 Comment
  SBBG128188  Cephalanthus occidentalis L. Ahart 2009-7-9 16019 Butte E side of Chico Crk, W of Ten Mile House Rd, Upper Bidwell Park, 0.75 mi W of Hwy 32 203 Comment
  JEPS87502  Cerastium glomeratum Vernon H. Oswald and Lowell Ahart 1993-3-24 5238 Butte e. side of Dry Creek Canyon n. of Pentz historical site (on e. side of secondary drainage entering Dry Creek 2 mi. n. of Pentz Rd.) 243 Comment
  UC203620  Cerastium glomeratum A. A. Heller 1914-3-7 11187 Butte low hills 8 mi. n. Oroville Comment
  CDA36293  Ceratophyllum demersum Ed Finley? Jul 1987 Butte Sacramento River, Mile 195, east bank. [Near Hamilton City] 0 Comment
  HSC4315  Ceratophyllum demersum T. F. Newman 1964-4-17 6441 Butte SW of Oroville Comment
  UC956837  Ceratophyllum demersum Herbert L. Mason and Verne Grant 1946-8-8 12994 Butte Sanford Slough on Tule Gun Club (Butte Sink); , Sanford Slough Comment
  CHSC111732  Cercis canadensis Lowell Ahart 2012-6-28 18236 Butte Northeast edge of Sycamore Pool, Lower Bidwell Park, Chico. 61 Comment
  CHSC26457  Cercis occidentalis P. Moyer 1972-3-11 120 Butte CSUC Campus. E side of Cafe bridge, n bank of Chico Ck. 60 Comment
  RSA794797  Cercocarpus betuloides var. betuloides L. Ahart, John Dittes 2009-3-20 15518 Butte On south side of the Guardian Rock Trail, about 175 yards southwest of the Ten Mile House Road Trail, about 200 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
  CAS-BOT-BC276479  Chaenactis douglasii var. douglasii E. B. Copeland 1931-7-6 693 Butte Jonesville 1900 Comment
  CHSC11880  Chamaesaracha nana E. B. Copeland 1929-7-16 396 Butte Jonesville. 1550 Comment
  CHSC37373  Chamaesyce ocellata R. A. Schlising 1981-9-20 4196 Butte Richvale Vernal Pools, 1/4 mi s of jct Hwy 162 to Oroville and Hwy 99, along latter and across from Thermalito Afterbay. Comment
  CDA38788  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart 2011-10-29 17722 Butte On the south side of Biggs Princeton Road, about 500 yards west of Riceton Highway, about 1 mile northwest of Biggs. Comment
  CHSC113532  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2014-9-23 19877 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
  CHSC20970  Chamaesyce serpillifolia subsp. serpillifolia M. S. Taylor 1975-8-31 900 Butte Ca. 30 ft n of Humboldt Rd, ca. 1/2 mi e of Butte Meadows. 1341 Comment
  CHSC29804  Chamaesyce serpillifolia subsp. serpillifolia M. S. Taylor 1979-10-3 2219 Butte Butte Creek Canyon, ca. 1/4 mi upstream from bridge crossing Butte Creek at Helltown Rd, ca. 7 mi e of Chico. Comment
  JEPS115581  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2009-9-13 16404 Butte On the bottom of a large wash, Peter Ahart Ranch, about 2 miles north and 1/4 mile east of Honcutt, about 12 miles (air) south of Oroville 30 Comment
  UC1562273  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 1990-7-4 6542 Butte 1/5 mi sw Enterprise Bridge (near McCabe Creek, below high water line); Lake Oroville 243 Comment
  UC1564751  Chamaesyce serpyllifolia V. Oswald and L. Ahart 1989-8-15 3942 Butte 1.2 air mi n Philbrook Reservoir (Soda Ridge Rd, 1.4 mi w of junction with Coon Hollow) 1752 Comment
  CAS-BOT-BC69448  Cheilanthes gracillima E. B. Copeland 1929-7-13 327 Butte Jonesville. 1700 Comment
  CHSC39229  Cheilanthes gracillima M. S. Taylor; K. Tharp 1983-3-11 5223 Butte Big Bald Rock, ca. 3 mi s of Bruch Creek, ne of Oroville. 975 Comment
  CHSC39234  Cheilanthes gracillima M. S. Taylor; L. Ahart, J. Jokerst 1982-1-17 5214 Butte Vicinity of mouth of Flag Canyon. On top of North Table Mt., ca. 8 mi n of Oroville. 373 Comment
  CDA3122  Chenopodium multifidum D. G. Kelch 2006-8-2 6 .349 Butte Butte Creek, north of Durham-Dayton Highway. Comment
  UCSB64026  Chenopodium murale Ahart, Lowell 1981-7-26 Butte 1/10 mile west of Pennington Road, just west of the road to the Gray Lodge Waterfowl Management Area Headquarters, about 12 miles south-west of Gridley 30 Comment
  UC204577  Chenopodium pumilio A. A. Heller 1914-7-20 11580 Butte 8 mi n Oroville Comment
  CHSC48670  Chimaphila menziesii Vernon Oswald 1983-8-17 998 Butte Pacific Crest trail ca. 2000 ft E of Humboldt Summit. 2011 Comment
  CHSC48671  Chimaphila umbellata Vernon Oswald 1987-7-16 3128 Butte West Branch of Feather River where it crosses the road to Jones Meadow, ca. 1 mi (air) ne of Inskip. 1341 Comment
  SEINET3451380  Chloris virgata Unknown 2006-8-2 6 .337 Butte East of Butte City, East of Butte City, along Ord Ferry Road, east of old Sacramento River district 30 Comment
  CHSC103997  Chorizanthe polygonoides var. polygonoides Lowell Ahart 2010-5-7 16617 Butte On the north side of a trail, west of disk golf area, on a ridge about 350 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 353 Comment
  CHSC45363  Chorizanthe polygonoides var. polygonoides Vernon Oswald 1984-4-4 1117 Butte Humbug Rd., 1.6 mi s-w of its jct. with Nimshew Ridge Rd., ca. 3 mi w of Magalia. 670 Comment
  CHSC94048  Chorizanthe polygonoides var. polygonoides R. D. Fischer 2005-5-18 722 Butte Sierra Nevada foothills, adjacent Hwy. 32, ca. 4 miles east of Chico in Bidwell Park. Plants growing on the thin, rocky Tuscan mudlfow of the ridge top at the north end of Humboldt Trail. 426 Comment
  CAS-BOT-BC247538  Chorizanthe stellulata David D. Keck 1933-5-31 2413 Butte 4.3 miles north of Chico city limits, on Richardson Springs road Comment
  UCD40403  Chrysolepis Rodney Gale Myatt 1971-6-13 728 Butte 1 mi. north of Inskip. Skyway Road, north of Paradise. Road between Butte Meadows and Magala. Comment
  CHSC3367  Chrysolepis sempervirens M. Gregg 1966-4-23 105 Butte 2 miles south of Butte Meadows on Bull Run Rd. Along side of road. Comment
  POM219417  Chrysolepis sempervirens H. F. Copeland 1928-8-14 215 Butte Neighborhood of Jonesville, on dry ridge above Scotch-John Creek. 1829 Comment
  SEINET10904849  Chrysopsis oregona var. compacta Mary Susan Taylor 1980-9-26 Taylor 3340 Butte In Lindo Channel, jct of Mangrove and Cohasset Rds, Chico. 46 Comment
  CHSC26652  Cichorium intybus M. S. Taylor 1977-11-10 1528 Butte Ca. 1 mi E of jct of Nelson West Rd and Chico-Butte Hwy, on N side of Nelson West Rd, ca. 23 mi S of Chico. 30 Comment
  UCR7827  Cichorium intybus Wm. Horn Jr. 1964-6-28 640628- 01 Butte California Div. of Forestry Station; along road 1083 Comment
  SEINET179237 Image available Cirsium andersonii E. B. Copeland 1931-7-27 693 Butte Jonesville 1650 Comment
  UC177564  Cirsium andersonii H. M. Hall 1914-7-30 9817 Butte n Butte Co. Sierra Nevada Mountains 1615 Comment
  RSA0070561  Cirsium andersonii E. B. Copeland 1931-7-27 693 Butte Jonesville. 1650 Comment
  CAS-BOT-BC285525  Cirsium occidentale var. candidissimum John Thomas Howell 1955-6-15 30504 Butte Near Pentz Comment
  UC397531  Cirsium vulgare E. Bleopelaud 1929-7-1 Butte Jonesville 1650 Comment
  UC1586571  Citrullus colocynthis var. lanatus Vernon H. Oswald and Lowell Ahart 1990-10-11 4458 Butte about 4 mi s of Jarbo Gap (Dark Canyon arm of Lake Oroville); Lake Oroville 259 Comment
  HSC32601  Clarkia arcuata Kitsy Kelly 1974-4-20 24 Butte Table Mtn. Volcanic area Comment
  UCD103991  Clarkia arcuata R. J. Goedl 1979-4-14 26 Butte Ca. 6 miles N of Oroville, 100 ft. W of Cherokee Mountain Road. 365 Comment
  CAS-BOT-BC164137  Clarkia concinna Lowell Ahart 1980-5-25 2341 Butte Along Ponderosa Way 600 Comment
  JEPS105640  Clarkia concinna subsp. concinna L. P. Janeway, John Hunt, Adam Henderson 2003-6-3 7804 Butte Northern High Sierra Nevada. Southeast side of Middle Fork Feather River arm of Lake Oroville, 1.4 km southwest of mouth of Bean Creek 283 Comment
  CAS-BOT-BC165940  Clarkia gracilis Lowell Ahart 1975-5-12 s.n. Butte Peter Ahart Ranch, Honcut Comment
  POM37904  Clarkia gracilis subsp. albicaulis R. M. Austin 1883-05 s.n. Butte [No location information on label.] Comment
  UC107825  Clarkia gracilis subsp. albicaulis R. M. Austin July 1896 848 Butte Little Chico Creek Comment
  UC1071907  Clarkia mildrediae H. and M. Lewis, F. Vasek June 1950 756 Butte 0.5 mi s Arch Rock (Hwy.24); Feather River Comment
  UCD104578  Clarkia mildrediae B. Castro; Robin Fallscheer 1989-7-13 321 Butte Ca. 4.5 road miles NE of Brush Creek, ca. 0.2 mile SW of Junction House, on NW-facing road cut on SE side of the Oro-Quincy Highway ca 0.6-0.7 mile S of its junction with USFS Road 23N60. 990 Comment
  CHSC71144  Clarkia mildrediae subsp. lutescens L. P. Janeway 1993-7-6 4429 Butte Western end of Watson Ridge; about 1.8 mi east-northeast of Bald Rock Dome; about 0.7 mi northwest of Fall River. 1097 Comment
  CHSC37426  Clarkia mosquinii R. A. Schlising; K. Tarp, R. Banchero 1981-7-11 4134 A Butte NE of Oroville; N of the French Creek Road crossing of Peavine Creek. Roadside. 647 Comment
  UC1422865  Clarkia mosquinii Mosquin 1959-7-2 3336 Butte 0.2 mi w Enterprise (along highway) Comment
  RSA122147  Clarkia purpurea subsp. purpurea F. W. Embree 1934-4-24 43 Butte 4.5 miles north and 1.5 mile east of Bigg 38 Comment
  CAS-BOT-BC163655  Clarkia purpurea subsp. quadrivulnera Lowell Ahart 1987-5-22 5667 Butte About 1/4 mile south-east of Lumpkin Ridge Road, about 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls 1280 Comment
  CHSC35144  Clarkia purpurea subsp. quadrivulnera R. Schlising; R. Banchero 1980-6-6 3648 Butte N of Lake Oroville along Hwy 162, 1.7 mi N of Bidwell Bar Bridge crossing of the lake. Roadside bank. 304 Comment
  CAS-BOT-BC164792  Clarkia rhomboidea L. P. Janeway; Perrie Cobb 1993-6-1 4364 Butte Southeast side of canyon of North Fork Feather River; along dirt road from Cresta Rest Area to the Bear Ranch Creek falls 487 Comment
  CAS-BOT-BC164796  Clarkia rhomboidea L. P. Janeway 1991-6-1 3985 Butte Northwest-facing cut-bank of Dark Canyon Road 3.3 mi south of Big Bend Road/Parkhill 304 Comment
  CHSC64118  Clarkia rhomboidea L. P. Janeway; Jean Hubbel, Dave Wood 1994-6-3 4655 Butte Forest Ranch; 0.5 mi east of Hwy 32 on Nopel Avenue and Cody Lane. Along side of dirt road. 725 Comment
  CHSC70755  Clarkia rhomboidea L. P. Janeway 1994-6-17 4664 Butte Along Pulga Road (Camp Creek Road) 7.5 mi northeast of Pulga Bridge (Hwy 70); northwest side of canyon of North Fork Feather River almost overlooking Arch Rock. 701 Comment
  JEPS113191  Clarkia rhomboidea Lowell Ahart 2007-5-29 13923 Butte About 1/8 mile south of Bald Rock Dome, on the east side 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 685 Comment
  UC1186584  Clarkia rhomboidea G. I. Stage, R. W. Thorp 1959-6-21 59 -121 Butte 11.9 mi ne Chico (Highway 32) 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
  CHSC39353  Clarkia unguiculata Lowell Ahart 1983-6-30 4170 Butte On the road cut-banks along old Highway 40, near the rest area, and near where the road runs into Lake Oroville, about 4 miles south of Jarbo Gap. 350 Comment
  CHSC46494  Clarkia unguiculata Lowell Ahart 1989-5-31 6333 Butte On the west side of a small stream, north of the end of Truex Road, near Lake Oroville, about 1/4 mile north-west of the West Branch Bridge across Lake Oroville. 304 Comment
  RSA516781  Clarkia unguiculata L. Ahart 1980-5-13 2266 Butte Along Pacific Heights Road, Oroville 35 Comment
  UC1539068  Claytonia palustris John R. Swanson 1959-7-4 490 Butte meadow above south bank of Jones Creek (0.4 km e of Jonesville Hotel); Jonesville; Jonesville, Butte Co., above S bank of Jones Creek, E of the Jonesville Hotel. 1550 Comment
  SEINET10572705  Claytonia parviflora Mary Susan Taylor 1981-3-16 Taylor 3409 Butte T21N R4E southcenter sec 16; Cherokee q. E side of Truex Rd, ca. 0.5 mi s of its jct with Hwy 70, ca. 7 mi n of Oroville. Foothill Woodland; 1000 ft. 305 Comment
  CHSC10853  Claytonia parviflora subsp. parviflora Lowell Ahart 1969-3-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET11946901  Claytonia parviflora subsp. parviflora Unknown 1998-4-11 15 Butte Chico, Upper Bidwell Park about 1 km E of Horseshoe Lake, along gravel road that follows Chico Creek 104 Comment
  SFV11272  Claytonia perfoliata M. L. Vincent 1963-6-8 397 Butte Sierra Nevada Honey Run Road. West of Paradise. Comment
  RSA32932  Claytonia perfoliata A. A. Heller 1920-4-10 13361 Butte Chico. Comment
  SEINET11931070  Claytonia perfoliata Unknown 1978-1 11 Butte ca 20 yds N of the Skyway, 3.7 mi E of jct of Hwy 99 and the Skyway, 6.7 mi SE of Chico 207 Comment
  CHSC30356  Claytonia perfoliata subsp. perfoliata J. D. Jokerst 1979-3-5 1139 Butte Top of North Table Mt., 300 m NW of the intersection of Cherokee Rd and the E edge of section 17. Comment
  CHSC34700  Claytonia perfoliata subsp. perfoliata M. S. Taylor 1981-5-28 3807 A Butte Weedy on Valombroia St., e of its jct with Esplanade, Chico. 30 Comment
  CAS-BOT-BC443702  Claytonia rubra L. P. Janeway 1988-7-16 2878 Butte Creek along Bull Hill Road 2.2 mi from Skyway. 1508 Comment
  CHSC37618  Clematis lasiantha T. B. Devine 1979-7-8 581 Butte Along Hwy 32, ca. 1/2 mi below T.V. cable antenna, ca. 11 mi N of Chico. Comment
  SEINET12319539  Collinsia grandiflora Unknown 1973-1 14 Butte ca 5 mi NE of Oroville, on top of Table Mt., 20 yds off E side of Old Cherokee Rd Comment
  CHSC43756  Collinsia parviflora Vernon Oswald; Lowell Ahart 1987-6-10 2982 Butte Forest Service road joining Humbug Rd. in about the center of Section 22, in the first drainage e of Hunbug Rd. 1874 Comment
  CHSC31823  Collinsia sparsiflora L. Ahart 1979-4-28 1851 Butte Peter Ahart Ranch, Honcut. Along banks of North Honcut Creek. 50 Comment
  JEPS6659  Collinsia sparsiflora var. collina A. A. Heller 1938-4-23 15053 Butte Near oak trees on Highway #24 near the summit above the junction with the Yankee Hill road. Arid Transition Zone. 609 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
  JEPS81035  Collinsia sparsiflora var. collina J. P. Smith Jr. 1973-3-22 5914 Butte 2.1 mi E of junction with US 99 and the road to Paradise, California. 121 Comment
  CHSC84862  Collinsia tinctoria L. P. Janeway; John Hunt 2003-6-6 7814 Butte Northern Sierra Nevada Foothills. East-southeast facing slope above Lake Oroville 350 m northeast of the north end of Bidwell Bar Bridge. 296 Comment
  UCD118124  Collomia grandiflora E. B. Copeland 1931-7-14 677 Butte Jonesville. 1550 Comment
  CHSC34597  Collomia heterophylla R. A. Schlising; P. Broyles 1979-5-15 3405 Butte NW of Concow Reservoir at Griffin Gulch. Roadside. 640 Comment
  CHSC34993  Collomia heterophylla R. Schlising; R. Banchero 1980-6-6 3650 Butte N of Lake Oroville on Bald Rock Road, 0.8 mi S of jct with Oroville-Quincy Highway at Brush Creek. 1024 Comment
  CHSC45347  Collomia heterophylla Vernon Oswald 1987-3-31 2304 Butte Butte Creek Reserve on the s side of Butte Creek n of the Skyway, ca. 0.1 mi w of the double set of transmission lines. On a sand bar along the creek. 85 Comment
  POM183159  Collomia linearis H. F. Copeland 1930-7-26 1321 Butte Jonesville, by Butte Creek. 1524 Comment
  UC1594615  Collomia linearis Lowell Ahart 1992-7-21 6819 Butte about 2 (air) mi ne Philbrook Reservoir (s side of hollow nw of a snow lake, on s side of Coon Hollow); Coon Hollow 1737 Comment
  CHSC43703  Collomia tinctoria Vernon Oswald 1983-8-4 958 Butte Near Humboldt Rd. 3.5 mi n-e of Butte Meadows. Along Butte Creek. 1414 Comment
  UC600656  Collomia tinctoria E. B. Copeland 1929-7-18 Butte on slides over Butte Creek; Jonesville 1550 Comment
  UC600657  Collomia tinctoria H. F. Copeland 1937-9-4 954 Butte Jonesville Comment
  CHSC40381  Comandra umbellata subsp. californica Lowell Ahart 1985-5-15 4983 Butte East along the dirt road, about 1/2 mile north-east of Concow Res. 594 Comment
  CHSC34217  Conium maculatum M. S. Taylor 1981-5-28 3806 Butte Along River Rd, near bridge over slough, ca. 5 mi sw of Chico. 36 Comment
  SEINET10454741  Conium maculatum Mary Susan Taylor 1981-5-18 Taylor 3806 Butte T21N R1W Chico quad. Along River Rd, near bridge over slough ca. 5 mi SW of Chico. 120 ft. 36 Comment
  SEINET10474183  Conyza bonariensis Lowell Ahart 1985-1-27 Ahart 4836 Butte Kunkle Res., about 2 miles south of Paradise. Comment
  CAS-BOT-BC286064  Conyza canadensis A. A. Heller 1914-8-13 11680 Butte 8 miles north of Oroville Comment
  CAS-BOT-BC237926  Cordylanthus Lowell Ahart 1980-7-4 2450 Butte Near Hurleton 600 Comment
  HSC97156  Cordylanthus pilosus subsp. trifidus L. Ahart 2003-8-7 10479 Butte 0.5 mi. N of Cherokee Rd., N Table Mtn., about 7 mi. (air) N of Oroville 320 Comment
  CHSC48988  Cordylanthus tenuis subsp. viscidus Vernon Oswald 1985-7-15 1906 Butte Concow Rd. 0.2 mi s of Ponderosa Way, also called Rim Rd. 950 Comment
  JEPS19733  Cordylanthus tenuis subsp. viscidus Rimo Bacigalupi with Howard Whisler 1957-7-26 6038 Butte 2.2 mi sw of and below Nimshew (along Humbug Road on the eastern canyonside of Butte Creek); Butte Creek 609 Comment
  CHSC3311  Cornus florida M. Gregg 1966-4-13 65 Butte CSC campus behind the dining hall. Chico. Comment
  CHSC66075  Cornus glabrata Vernon H. Oswald 1996-5-22 7627 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Growing in the edge of a slough at the SE corner of the Riparian Sanctuary. 28 Comment
  CHSC52016  Cornus nuttallii Steven Triano 1988-4-17 58 Butte Ca 50 ft e of Hwy. 32 and 6.54 mi n of Forest Ranch. 984 Comment
  SEINET10453479  Cornus nuttallii Mary Susan Taylor 1981-4-14 Taylor 3531 Butte T22N R4E sw sec 12. Pulga SW quad. Mixed Coniferous Forest, loamy soil over rocky base, on Ponderosa Way(Rim Rd) ca. 2 mi N of Jarbo Gap on Hwy 70, ca. 20 air mi N of Oroville. 2900 ft. 884 Comment
  CHSC20127  Cornus sessilis M. S. Taylor 1975-5-2 550 Butte Along dirt rd. ca. 1/4 mi w of Cohasset Rd, ca. 21 mi ne of Chico. 1036 Comment
  HSC97081  Coronilla varia L. Ahart 2006-6-24 12862 Butte On Cohasset Ridge, about 4 mi. NE of Cohasset, E side of Ponderosa Way. 1113 Comment
  JEPS106093  Coronilla varia Lowell Ahart 2004-6-22 11121 Butte On the west side of Doe Mill Road, about 1 mile southeast of the bridge across Butte Creek, about 2 1/2 miles (air) southeast of Forest Ranch, about 5 miles (air) southwest of Stirling City 713 Comment
  CHSC46795  Corydalis caseana subsp. caseana R. A. Schlising; P. Broyles 1987-6-26 4526 Butte NE of Inskip, just E of Brown Ravine, on small tributary of Last Chance Creek. 1584 Comment
  CAS-BOT-BC401862  Corydalis caseana subsp. caseana A. A. Heller 1928-6-20 14685 Butte Forest of Butte Meadows Comment
  CHSC82274  Cotoneaster lacteus M. MacArthur 1968-6-16 332 Butte NW side of Aymer Jay Hamilton School, Chico State College campus. 60 Comment
  CHSC54345  Cotoneaster pannosus Lowell Ahart 1991-5-31 6658 Butte Along the Dan Beebe Trail in Lake Oroville Recreation Area, between Canyon Drive and Oroville Dam Blvd East, south-west of Oroville Dam. 213 Comment
  UC1586403  Cotoneaster pannosus Lowell Ahart 1991-6-19 6661 Butte along the Dan Beebe Trail in Lake Oroville Recreation Area, between Canyon Drive and Oroville Dam Blvd East, southwest of Orovillle Dam. 213 Comment
  CHSC50643  Cotula australis Lowell Ahart 1990-5-28 6498 Butte Along the edges of Palm Avenue, near the old bridge, about 2 1/2 miles north-east of East Gridley. 30 Comment
  RSA517004  Cotula coronopifolia Barbara Ertter, Lowell Ahart 1986-4-13 5903 Butte 2 air miles NNE of Honcut between Oroville and Marysville, Peter Ahart Ranch (Mostly used as sheep pasture). 30 Comment
  SEINET10482970  Crassula Lowell Ahart, Peter Ahart 1985-11-5 Ahart 5227 Butte Lake Oroville, about 1/2 mile west of the Ponderosa Dam, near where Sucker Creek flows into the South Fork of the Feather River. Comment
  SEINET10449700  Crassula aquatica Mary Susan Taylor 1982-4-28 Taylor 4358 Butte T17N R1E se/sw sec 13. Pennington qud. Graylodge Wildlife Refuge, n side of Rutherford Rd, ca. 1/2 mi w ofits jct with Pennington Rd, ca. 12 mi sw of Gridley. 70 ft. 21 Comment
  CHSC113221  Crassula connata Lowell Ahart 2014-5-2 19425 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
  JEPS118613  Crataegus monogyna L. P. Janeway 2011-4-20 10235 Butte Sacramento Valley. Lower Bidwell Park, Chico; near northwest edge of the park, near Vallombrosa Ave between Madrone Ave and Crister Ave. Chico 7.5; quad. Comment
  JEPS120499  Crepis occidentalis subsp. conjuncta L. P. Janeway 2012-6-7 10862 Butte Northern High Sierra Nevada. Southwestern spur of Rocky Ridge, 0.6 air km south of Batchelor Point; along Road 23N06E 0.8 road km southeast of Rim Road / Ponderosa Way. Comment
  CAS-BOT-BC290745  Crepis occidentalis subsp. occidentalis H. F. Copeland 1931-6-11 1532 Butte Jonesville. Near Butte Creek Meadows 1828 Comment
  CHSC109531  Crepis pleurocarpa L. P. Janeway 2012-6-23 10890 Butte Northern High Sierra Nevada. Southwestern spur of Rocky Ridge, 0.6 air km south of Batchelor Point; along Road 23N06E 0.8 road km southeast of Rim Road/Ponderosa Way. 895 Comment
  CHSC84052  Crucianella angustifolia Lowell Ahart 2003-5-26 10214 Butte On the west side of North Honcut Creek, about 2 1/2 miles north and 2 2/3 miles east of Honcut, about 12 miles southeast of Oroville. 60 Comment
  SEINET11091472 Image available Crucianella angustifolia Barbara Ertter, Lowell Ahart, Jeff Strachan 1980-1 3282 Butte Peter Ahart Ranch, ca. 2.5 mi NNE of Honcut between Oroville & Marysville 30 Comment
  CHSC106343  Crypsis schoenoides Lowell Ahart; John Dittes 2010-8-30 17070 Butte About 150 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
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Oct 5 2019
  CHSC31726  Crypsis schoenoides L. Ahart 1974-9-8 633 Butte Bottom of a wash. Peter Ahart Ranch, Honcut. 45 Comment
  JEPS95949  Crypsis schoenoides Lowell Ahart 1999-8-13 8148 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
  CHSC29038  Cryptantha affinis J. D. Jokerst 1979-7-3 276 Butte Edges of Jones Cr, N of the town of Jonesville. 1737 Comment
  CHSC33408  Cryptantha affinis R. A. Schlising; R. Banchero 1980-7-7 3842 Butte E of Feather Falls village, 0.2 mi N of Lumpkin-La Porte Road, on road to Fall River Campground. 1158 Comment
  CHSC33410  Cryptantha affinis R. A. Schlising; R. Banchero 1980-7-14 3896 Butte Along Skyway in N. Butte County, 4.3 mi N of Inskip (=0.9 mi N of jction Skyway and Bull Hill Road). 1539 Comment
  CHSC33411  Cryptantha affinis R. A. Schlising; R. Banchero 1980-7-7 3859 Butte East of Feather Falls on Lumpkin Ridge, along Lumpkin/La Porte Road, just west of dirt road dropping down to Fall River. 1280 Comment
  POM183197  Cryptantha affinis H. F. Copeland 1930-7-28 1386 Butte Neighborhood of Jonesville. 1829 Comment
  CHSC40754  Cryptantha flaccida Lowell Ahart 1985-5-6 4931 Butte Along Table Mountain Boulevard, south of the Cambell Overflow, 1/2 mile south of the intersection of Highway 70 and 149, about 7 miles north of Oroville. 100 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
  SEINET12329561  Cryptantha hendersonii Unknown 1984-1 4677 Butte ca 1 mi E of Ponderosa Dam, ca 2 mi N of Forbestown, Yellow Pine Forest 475 Comment
  CHSC67753  Cryptantha intermedia James D. Jokerst; M. S. Taylor 1980-4-19 611 Butte Humbug Rd. 7.4 mi N of Centerville Cemetery. Comment
  JEPS98598  Cryptantha intermedia Lowell Ahart 2000-5-31 8421 Butte 3 mi SE of Paradise (a serpentine ridge, about 200 yds E of where Kunkle Creek enters Lake Oroville, E of the Kunkle Power House) 335 Comment
  POM252793  Cryptantha intermedia A. A. Heller 1938-5-28 15121 Butte 23 miles from Oroville on the Feather River Highway. Comment
  UCD80136  Cryptantha intermedia CNPS SN Foothill Team 2006-5-23 SNNR 0789 a Butte BLM Parcels near Paradise. 520 Comment
  CHSC33259  Cryptantha simulans R. A. Schlising 1980-6-24 3774 Butte N of Oroville along Hwy 70 in canyon of North Fork of Feather River; 0.2 mi N of Cresta Powerhouse. 457 Comment
  UC600567  Cryptogramma acrostichoides H. F. Copeland 1932-7-24 Butte Jonesville, Butte Creek drainage Jonesville Comment
  SEINET10529783  Cryptogramma crispa subsp. acrostichoides Mary Susan Taylor 1979-7-21 Taylor 2151 Butte Humboldt Peak, at Humboldt Summit, tallest point in the county, on Butte- Tehama County line. 2155 Comment
  CHSC27180  Cupressus sempervirens M. MacArthur 1968-6-22 272 Butte Ca. 20 ft. NW EP bld., Chico State College. 60 Comment
  UC1191664  Cuscuta californica Herbert L. Mason and Verne Grant 1946-9-27 13132 Butte Graylodge Game Refuge Butte Sink Comment
  HSC97157  Cuscuta campestris L. Ahart 2006-10-1 13388 Butte Bottom of dredger pond, W of N Honcut Creek, about 2.5 mi. N and 2.75 mi. E of Honcut, about 12 mi. SE of Oroville 55 Comment
  CHSC113062  Cuscuta occidentalis Lowell Ahart 2013-7-16 18838 Butte On dry smoothed dredge tailings, northwest of a large wash, about 1/2 mile southeast of Honcut Cemetary, about 3 1/4 miles (air) northeast of Honcut. 54 Comment
  CHSC29826  Cuscuta pentagona M. S. Taylor 1980-6-7 2791 Butte SW corner of Hwy 162 and Aguas Frias (Goodspeed-Watt Rd on some maps), ca. 15 mi s of Chico. 45 Comment
  JEPS110300  Cuscuta pentagona Lowell Ahart 2006-9-13 13313 Butte South edge of the North Fork of the Feather River, just west of Mill Creek, north side of Highway 70, about 1/8 mile west of the Poe Dam, about 3/4 mile northeast of Pulga, about 21 miles (air) northeast of Oroville 431 Comment
  CHSC61293  Cycladenia humilis var. humilis Lowell Ahart 1993-7-31 7144 Butte On the south side of the dirt road that leads to Ramsey Bar, about 1/2 mile north of Ramsey Bar. 1371 Comment
  SBBG128008  Cymopterus terebinthinus var. californicus L. Ahart 2010-9-21 17233 Butte between the Sky High Mine and Dresser Camp, ca. 2 mi SE of the Philbrook Reservoir Dam, ca. 7 mi SE of Butte Meadows 1917 Comment
  CAS-BOT-BC190245  Cynodon dactylon Lowell Ahart 1962-6-10 s.n. Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET11688676  Cynodon dactylon Unknown 1982-1 428 Butte behind President's Mansion, California State University, Chico Comment
  CAS-BOT-BC190373  Cynosurus John Thomas Howell 1980-5-26 53582 Butte Sierra Nevada. 2 miles northeast of Pulga Bridge, North Fork of Feather River. Comment
  CAS-BOT-BC190392  Cynosurus echinatus Clare B. Hardham 1975-6-7 20429 Butte South end of Oroville Dam. Comment
  CHSC117599  Cynosurus echinatus L. P. Janeway 2016-6-2 12104 Butte Northern High Sierra Nevada. Plumas National Forest; Field Ridge Meadow; on the ridge between South Fork Feather River and Sucker Run; 1.5 air-km east-northeast of Ponderosa Reservoir. 872 Comment
  CHSC38804  Cynosurus echinatus Vernon Oswald 1983-5-4 429 Butte Upper Bidwell Park, Chico, beside the trail on the n side of Chico Creek 400 ft w of the power lines. 91 Comment
  CHSC45208  Cynosurus echinatus Lowell Ahart 1975-5-12 759 Butte Near North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 3 miles east of Honcut, about 12 miles south of Oroville. 45 Comment
  JEPS113689  Cyperus bipartitus Lowell Ahart 2007-8-19 14485 Butte About 2 1/4 miles (air) southeast of Honcut, about 13 miles (air) southeast of Oroville 49 Comment
  CHSC10729  Cyperus difformis Lowell Ahart 1969-9-24 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC83007  Cyperus difformis Lowell Ahart 2002-9-7 9930 Butte On the east side of Cherokee Road, north of the Thermalito Diversion Canal, on the west side of the water purification pond, about 1 mile north of Oroville. 130 Comment
  CHSC28865  Cyperus eragrostis J. D. Jokerst; T. B. Devine, D. Greenstein 1979-5-18 432 Butte Along edges of first drainage north west of jct of east edge of Mt and Cherokee Rd. Top of North Table Mt. Comment
  CHSC4293  Cyperus eragrostis M. M. Gregg 1966-5-27 182 Butte CSC Campus: in lawn, across from the Dick Lewis Memorial Barbecue Pit. Which is found behind the dining hall. Chico. Comment
  CHSC71197  Cyperus eragrostis Lowell Ahart 1998-6-30 8009 Butte Margins of a seep, west of the lone oak treek west of the cow chute on the west side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  JEPS94691  Cyperus eragrostis Lowell Ahart 1998-6-30 8009 Butte about 7 air mi n of Oroville (w 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
  UCD169398  Cyperus erythrorhizos L. P. Janeway 2001-6-13 7166 Butte Sacramento Valley. On east side of the Sacramento River about 1.8 km southeast of Ord Ferry Road bridge. 29 Comment
  SEINET10467311  Cyperus erythrorhizos Mary Susan Taylor 1975-10-3 Taylor 940 Butte Ca. 1/4 mile N of the Washout, between River Road and the Sacramento River, ca. 10 mi W of Chico. Riparian Woodland and sloughs, wet and humid. 37 Comment
  CHSC68393  Cyperus esculentus L. P. Janeway 1986-10-15 1925 Butte In the City of Chico; weedy area along fence between plant nursery and Memorial Way (across from Bidwell Junior High School). 60 Comment
  RSA795668  Cyperus iria L. Ahart 2012-8-6 18415 Butte West side of Richvale South Highway, about 1.5 miles south of Richvale. 31 Comment
  CHSC26749  Cyperus niger M. S. Taylor; M. Hayes 1977-8-16 1447 Butte Near the man-made ponds on Clear Creek, Butte College Campus, ca. 15 mi s of Chico. 60 Comment
  CHSC68403  Cyperus niger L. P. Janeway 1988-6-26 2884 Butte Southeast rim of Coon Ridge overlooking Nance Canyon; about 0.6 mi northeast of the high voltage power lines. 182 Comment
  JEPS93818  Cyperus niger Lowell Ahart 1998-6-30 8010 Butte about 7 air mi n of Oroville (w 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
  SEINET228551  Cyperus niger Lowell Ahart 1981-9-6 3123 Butte Rest area just a little S of the Arch Rock Tunnel on Highway 70 about 4 miles N of Pulga. Comment
  CAS-BOT-BC113849  Cyperus niger var. capitatus Lowell Ahart 1980-7-29 2511 Butte Along Lower Forbestown Road. 750 Comment
  CHSC45124  Cyperus squarrosus Vernon Oswald 1987-6-12 2987 Butte West side of Sacramento River (but technically in Butte County because of shifting channel) between Big Chico Creek and Phelan Island, ca. 0.75 mi s of Big Chico Creek. 35 Comment
  CAS-BOT-BC114082  Cyperus squarrosus Clarence Roy Quick 1963-7-16 63 54 c Butte Section Corner Meadow, E of Pulga. 1463 Comment
  SEINET10470085  Cypripedium fasciculatum Mary Susan Taylor 1981-5-29 Taylor 3817 Butte T23N R7E nw/nw sec 29, Bucks Lake quad. Along Buckhorn Creek on S side, about midslope, ca. 200 ft W of 23N18.5, ca. 1 mi SW of Grizzly Mt, ca. 13 air mi NE of Pulga. Dense, shaded, moist Yellow Pine Forest; 5200 ft. 1585 Comment
  UC600566  Cystopteris fragilis H. F. Copeland 1932-7-24 Butte gulch draining into Butte Creek meadows Jonesville 1800 Comment
  CAS-BOT-BC68048  Cystopteris fragilis Lowell Ahart 1983-6-26 4130 Butte Small stream along Ponderosa Way, aobut 2 miles south-east of the intersection of the Oroville Quincy Highway and 500 Comment
  SD81976  Cystopteris fragilis H. F. Copeland 1932-7-24 Butte Jonesville 1800 Comment
  JEPS120989  Danthonia californica Lowell Ahart 2013-6-11 18801 Butte About 30 yards W of a wet meadow, about 40 yards N of Forbestown Road, about 150 yards E of the intersection of Forbestown Road and Black Bart Road, about 3.25 air miles SW of Forbestown. Comment
  POM92210  Darmera peltata C. C. Bruce 1898-1 2410 Butte [no additional locality data provided] Comment
  CHSC13709  Datura wrightii M. S. Taylor 1974-10-11 329 Butte In field ca. 50 yds e of River Rd, opposite washout on Sacramento River, ca. 10 mi w of Chico. Comment
  CHSC29798  Daucus pusillus M. S. Taylor; J. D. Jokerst 1980-5-14 2882 Butte On w side of Oroville-Quincy Hwy ca. 1 mi (2 mi by car) n of Bidwell Bar Bridge over south fork of Feather River, ca. 7 mi s of Lake Madrone. 457 Comment
  CHSC33895  Daucus pusillus M. S. Taylor 1981-5-21 3778 Butte S side of Concow Rd, ca. 0.5 mi s of its jct with Ponderosa Way, ca. 20 air mi n of Oroville. 853 Comment
  POM77818  Daucus pusillus C. C. Bruce 1898-06 2050 Butte By Chico Comment
  CHSC4562  Delphinium C. Glascock 1965-5-23 433 Butte Foothill Blvd 0.2 mi. e of its intersection with Oro-Bangor Hwy. Along roadside, Oroville. Comment
  RSA126003  Delphinium gracilentum E. K. Balls 1957-5-23 22529 Butte 3 miles SE from turn off Hwy 32 to De Sabla. 671 Comment
  CAS-BOT-BC8573  Delphinium hansenii A. A. Heller 1938-5-28 15110 Butte 2.5 miles E of Oroville on Highway 24 Comment
  CHSC46501  Delphinium hansenii Lowell Ahart 1989-5-31 6328 Butte Along Truex Road, near Lake Oroville, about 1/4 mile north-west of the West Branch Bridge across Lake Oroville. 304 Comment
  CAS-BOT-BC8568  Delphinium hansenii Lowell Ahart 1989-5-31 6328 Butte Along Truex Road, near lake Oroville, about 0.25 miles north-west of the West Branch Bridge across Lake Oroville 304 Comment
  CHSC104822  Delphinium hansenii subsp. hansenii Lowell Ahart 2010-6-1 16757 Butte On the south side of the Guardians Trail or South Rim Trail, under the power lines, upper Bidwell Park, about 2 miles (air) east of Chico. 144 Comment
  CHSC56579  Delphinium hesperium subsp. hesperium J. D. Jokerst 1981-5-11 1308 Butte Top of Doe Mill Ridge, center. 457 Comment
  SEINET5338040  Delphinium nudicaule P. A. Lehenbauer 1926-5-26 1239 Butte North Fork Feather River. Comment
  CAS-BOT-BC8067  Delphinium nuttallianum A. A. Heller 1915-6-10 11954 Butte Little Summit in the Sierra Nevada 1371 Comment
  POM196083  Delphinium nuttallianum E. B. Copeland 1929-6-12 1211 Butte chaparral near north Willow Creek. 1524 Comment
  CHSC100792  Delphinium variegatum Michael P. Crivello 1979-4-4 Butte Along Highway 32, 3.4 miles east of intersection with Highway 99 in Chico. 137 Comment
  CHSC25134  Delphinium variegatum subsp. variegatum C. A. Gardner 1974-4-16 15 Butte On Table Mountain ca. 6 mi n of Oroville, ca. 100 yds. off w side of Cherokee-Table Mountain Rd. 243 Comment
  CHSC75397  Delphinium variegatum subsp. variegatum Jennifer Slater 1997-4-6 4 Butte In vernal pool depression at the Wurlitzer addition of the Vina Plains Preserve, approx. one mile west of Highway 99. 67 Comment
  CHSC77438  Delphinium variegatum subsp. variegatum Tim Stofer 1997-4-13 12 Butte At the shooting range 100 yards from the head of the South Rim Trail off South Park Dr. in Upper Bidwell Park. 76 Comment
  JEPS115534  Delphinium variegatum subsp. variegatum Lowell Ahart 2009-5-15 15702 Butte about 20 yards east of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 234 Comment
  CHSC26780  Dendromecon rigida M. S. Taylor 1978-5-6 1580 Butte Magalia. 609 Comment
  SEINET7073608  Dendromecon rigida A. G. Vestal 1955-5-20 s.n. Butte About 5.6 miles south of Magalia on the Pentz Road [Pentz - Magalia Highway]. UTM Zone 10, 6223320mE, 4398975mN. Coordinate datum: NAD27. Comment
  SEINET12091622  Dendromecon rigida Unknown 1981-1 12 Butte ca 200 m W of Butte Creek and 1.2 km N of Magalia Reservoir, 2.5 km N. of Magalia 735 Comment
  SEINET10907270  Dentaria californica Mary Susan Taylor 1979-3-20 Taylor 1946 Butte T21N R4E nw1/4 sec. 21. Cherokee Quad. Along old road on N side of Hwy 70 following West Branch of the Feather River, which begins at S side of bridge over N fork of Feather River, ca. 10 mi N of Oroville; limestone outcrops within Foothill Woodland. 305 Comment
  CAS-BOT-BC192660  Deschampsia danthonioides A. A. Heller 1914-5-13 11399 Butte Between Durham and Nelson Comment
  CHSC103948  Deschampsia danthonioides Lowell Ahart 2010-5-14 16643 Butte On the west side of the old Humboldt Road, Disc Golf Area, about 150 yards north of the entrance to the Disc Golf Area, about 40 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 395 Comment
  CHSC34605  Deschampsia danthonioides Mary Banchero 1979-4-18 18 Butte Northernmost Butte county, ca. 0.5 mi n of Pine Creek, nw of Singer Creek; 7 mi nw of Nord on Cana-Pine Creek Road. Roadside. 56 Comment
  UC791015  Deschampsia danthonioides A. A. Beetle 1941-6-27 2746 Butte near Lomo at rd. forking to Chico Creek Lomo Comment
  SEINET10869046  Deschampsia danthonioides Lowell Ahart 1983-5-12 Ahart 3977 Butte Along the power line, ca. 0.5 mi ne of jct of Hwy 99 and Pentz Rd, ca. 16 mi s of Chico. Valley Grassland; 65 m. 65 Comment
  CHSC48253  Dianthus armeria subsp. armeria Vernon Oswald 1985-6-12 1828 Butte W side of Kunkle Reservoir se of Paradise. 445 Comment
  CHSC94163  Dianthus armeria subsp. armeria Lowell Ahart 2006-6-24 12863 Butte Disturbed area on the east side of the dirt road (Ponderosa Way), south of an intersection, a gated road goes southeast, on Cohasset Ridge, about 4 miles (air) northeast of Cohasset. 1113 Comment
  UC175320  Dicentra formosa A. A. Heller 1913-6-7 10831 Butte near Stirling; West Branch of the North Fork of Feather River 914 Comment
  CHSC90581  Dichelostemma capitatum subsp. capitatum Joseph Silveira 1982-4-17 11 Butte 275 m east-northeast of the old dump site and 0.8 km north of Little Chico Creek, 1.9 km east of Chico. 105 Comment
  CHSC9703  Dichelostemma capitatum subsp. capitatum Nancy Mosman 1971-7-3 64 Butte Along n side of Humboldt Road, ca. 0.8 mi e of Butte Meadow Ranger Station. 1371 Comment
  CHSC21268  Dichelostemma multiflorum M. S. Taylor 1974-3-5 72 Butte Around entrance to Richardson Springs, ca. 4 mi n of Chico. 121 Comment
  CHSC90608  Dichelostemma multiflorum Jose Romero 1983-4-20 19 Butte Site on the Oroville Wildlife Area. Junction of Larkin and Timothy Roads, 4 mi southwest of Oroville. 45 Comment
  SEINET232461  Dichelostemma multiflorum Margaret J. Williams, Wayne Roderick 1984-5-25 84- 22 -4 Butte Magalia near Skyline road to Paradise. 168 Comment
  SEINET10971332  Dichelostemma pulchellum Mary Susan Taylor 1980-3-1 Taylor 2332 Butte T21N R2E se 1/4 sec 15 and ne 1/4 sec 22. Hamlin Canyon quad. West end of Chico City Dump, on N side of Neal Rd, ca. 1 mi E of Hwy 99, ca. 7 mi S of Chico. 76 Comment
  CDA2107  Digitaria ischaemum D. G. Kelch 2006-8-2 6 .35 Butte Along Butte Creek, north of Durham-Dayton Hwy. Comment
  CAS-BOT-BC209034  Digitaria sanguinalis A. A. Heller 1914-6-2 11476 Butte Hills 8 miles north of Oroville. Comment
  CHSC45211  Digitaria sanguinalis Lowell Ahart 1976-7-4 1152 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. 45 Comment
  JEPS115002  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
  UCD63991  Digitaria sanguinalis E. Wilson 1934-9-3 Butte Biggs Rice Station. Comment
  CAS-BOT-BC153206  Diplacus kelloggii L. P. Janeway 1993-7-1 4418 Butte North side of French Creek, 0.3 mi west of mouth of Ram Creek; along Rd 22N34 0.3 mi west of the low water crossing of French Creek 624 Comment
  CHSC90161  Diplacus kelloggii T. N. Casale 1974-4-22 22 Butte On shoulder of road, ca. 3.3 mi ne of Covered Bridge on Honey Run Rd. 188 Comment
  CAS-BOT-BC153337  Diplacus layneae Lewis S. Rose 1955-6-14 55096 Butte Magalia 731 Comment
  CAS-BOT-BC217026  Diplacus layneae Javier Penalosa 1962-6-18 2474 Butte Near confluence of French and Peavine Creeks. 609 Comment
  CHSC38709  Diplacus tricolor Vernon Oswald 1983-4-20 357 Butte Upper Bidwell Park, Chico, near the s-w corner of the Omicron Enclosure (near the n boundary of the park ca. 500 ft e of the junction of Upper Park Rd. and Wildwood Ave.) 85 Comment
  CHSC75407  Diplacus tricolor Jennifer Slater 1997-4-27 32 Butte Edge of vernal pool depression at the Wurlitzer addition of the Vina Plains Preserve, west of Highway 99, approx. 10 miles north of Chico. 67 Comment
  CHSC76962  Diplacus tricolor Ida Ryan 1893-5-1 Butte Iron Canon (illegible). Comment
  SEINET8370227  Diplacus tricolor Christine C. Lorain 1995-4-30 2270 Butte just E of Floral Road in the northern part of Chico. 61 Comment
  CHSC2141  Distichlis spicata H. Silberman; D. Isaac 1949-9-19 Butte Grey Lodge State Game Refuge. Comment
  CDA35058  Dittrichia graveolens L. P. Janeway 2010-11-17 10220 Butte Sacramento Valley; Oroville; in gravel parking area at east side of Feather River Ranger District office (875 Mitchell Ave.) Comment
  CHSC108592  Dittrichia graveolens L. P. Janeway 2011-10-20 10778 Butte Sacramento Valley. South end of Chico; along west side of Hwy 99 0.6 km south of Skyway/East Park Ave and 0.3 km south of Comanche Creek. 66 Comment
  RSA726562  Dittrichia graveolens L. Ahart 2007-10-30 14506 Butte About 2.5 miles (air) northeast of Palermo, about 4.25 miles (air) southeast of Oroville. 130 Comment
  POM76693  Dodecatheon clevelandii subsp. patulum C. C. Bruce 1897-02 2098 Butte Little Chico. Comment
  HSC67921  Dodecatheon clevelandii subsp. patulum J. P. Smith 1973-3-22 5930 Butte 2.1 mi. E of junction with Hwy. 99 and the road to Paradise 122 Comment
  SEINET10449646  Dodecatheon jeffreyi Mary Susan Taylor 1978-6-24 Taylor 1646 Butte Cherry Creek meadow, on S side of Old Humboldt Road, ca. 4 mi E of Butte Meadows; Montane Meadow in Yellow Pine Forest. 1524 Comment
  UCD38751  Dopatrium junceum Beecher Crampton 1957-9-17 4622 Butte 5 miles northwest of Biggs, Biggs Rice Experiment Station. Comment
  CHSC28479  Downingia bella R. A. Schlising 1979-4-8 3355 Butte Richvale vernal pools. 1/4 mile s of jct Hwy 162 to Oroville and Hwy 99, along latter and across from Thermalito Afterbay. Comment
  CHSC21743  Downingia bicornuta Robert A. Schlising 1963-5-4 2552 t Butte 0.3 mi S of Jct 99E and Pentz Rd. 91 Comment
  RSA32824  Downingia bicornuta A. A. Heller 1927-5-3 14363 Butte Ten miles N of Chico. Comment
  RSA436094  Downingia bicornuta L. Ahart 1984-5-8 4599 Butte Ca. 2.5 miles N and 1.4 miles E of Honcut, ca. 12 miles S of Oroville. 40 Comment
  CHSC109728  Downingia bicornuta var. bicornuta B. Castro 2006-5-25 1532 Butte Sacramento Valley. Ca 8 mi SE of Chico, ca 0.5 mi E of Hwy 99 0.4 mi NE of its jcn with Durham-Pentz Rd. By pond next to E-W ranch road along transmission lines through flt grasslands with intermittent stream (unnamed tributary to Hamlin Ck). 56 Comment
  UC1562498  Downingia bicornuta var. bicornuta Barbara Ertter with Lowell Ahart 1986-4-13 5902 Butte ca 2 air mi nne Honcut (between Oroville and Marysville, Peter Ahart Ranch) 30 Comment
  UC2048627  Downingia insignis Lisa Schultheis 1995-6-9 212 -95 Butte North of Sutter Buttes. Gray Lodge Wildlife Refuge, west side of Pennington Road, 0.3 mile north of Sutter/Butte County Line. Comment
  CHSC183  Downingia ornatissima H. Summers 1929-4-17 Butte Rifle Range near Chico Creek canyon. 91 Comment
  CHSC28145  Downingia ornatissima Robert A. Schlising; Ellen Sanders 1979-4-28 3380 Butte Near Richvale; vernal pools in grassland w of Hwy 99 and Thermalito Afterbay; 1/4 mi s of jct Hwy 99 and Hwy 162 to Oroville. Comment
  UC1609088  Downingia ornatissima var. ornatissima Lowell Ahart 1993-5-17 6952 Butte about 1.5 mi n and 3 mi e Honcut (on the w side of Dunstone Road, about 12 mi se of Oroville) 60 Comment
  SEINET10448465  Draba verna Mary Susan Taylor 1973-1 Taylor 63 Butte Upper Bidwell Park, Chico. Associates: Stipa pulchra, Lasthenia chrysostoma, Layia fremontii. 61 Comment
  JEPS119838  Draba verna var. aestivalis Lowell Ahart 2012-3-23 17780 Butte 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. Comment
  CHSC38457  Draperia systyla Vernon Oswald 1983-6-7 638 Butte Upper Bidwell Park, Chico, on the s side of Chico Creek ca. 600 ft e of the footbridge at the golf course. 91 Comment
  RSA0011691  Drosera rotundifolia L. Ahart 2006-7-25 13065 Butte About 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1570 Comment
  SEINET10448021  Drosera rotundifolia Mary Susan Taylor, Lowell Ahart 1981-8-16 Taylor 4202 Butte T25 N R5E SW 1/4 sec 29. Pulga NW quad. Jones Meadow, ca. 3 mi S of Philbrook Reservoir, ca. 6 mi NE of Stirling City. Montane Meadow. 6000 ft. 1829 Comment
  UC859896  Drymocallis glandulosa A. A. Heller 1914-5-18 11411 Butte near Forest Ranch; west slope of the Sierra 731 Comment
  CHSC116222  Drymocallis glandulosa var. glandulosa Lowell Ahart 2015-6-16 20238 Butte On the west side of the paved road, about 4 miles (by road) northwest of Fall River Bridge, about 5 1/2 miles (air) northwest of Camp 18, about 9 miles (air) northeast of Feather Falls. 1406 Comment
  UC600381  Drymocallis lactea H. F. Copeland 1932-8-19 Butte Jonesville Jonesville (at the Lily Pond) 1700 Comment
  CHSC42012  Dryopteris arguta Lowell Ahart 1975-3-7 705 Butte About 1 mile west of the Forbestown Reservoir, north-east of Forbestown. 426 Comment
  JEPS116139  Dryopteris arguta Lowell Ahart 2009-5-23 15763 Butte Below the rim, south of a small drainage, about 40 yards west of Guardians Trail, about 100 yards northeast of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northea 381 Comment
  CAS-BOT-BC70858  Dryopteris arguta Wayne Dakan 1975-3-12 s.n. Butte Village of Pulga on the Feather River 457 Comment
  POM120873  Dryopteris arguta C. C. Bruce 1897-05 s.n. Butte Butte Creek. Comment
  SEINET10530142  Dryopteris arguta Mary Susan Taylor 1980-3-8 Taylor 2376 Butte Pulga community, ca. 1 mi NE of Hwy 70, ca. 28 mi NE of Oroville; serpentine soils. 488 Comment
  CDA25368  Dudleya cymosa subsp. gigantea L. L. Heinrichs 1971-5-27 Butte Swede Flat Road, Oroville. 0 Comment
  CHSC31540  Dysphania ambrosioides L. Ahart 1978-8-30 1799 Butte Along the edge of North Honcut Creek. Peter Ahart Ranch. 15 Comment
  CHSC31541  Dysphania ambrosioides L. Ahart 1978-7-23 1790 Butte Along the rd to our home. Peter Ahart Ranch, Honcut. 50 Comment
  CHSC81778  Dysphania ambrosioides Lowell Ahart 2001-10-10 9413 Butte On the north side of Gridley Road, about 100 yards southeast of the bridge across the Feather River, about 3 1/2 miles (air) east of Gridley. 27 Comment
  JEPS128762  Dysphania ambrosioides Lowell Ahart 2016-10-12 21372 Butte Dave Daley Ranch, about one-mile northeast of Honcut, about 12 miles south Oroville. Comment
  UCSB64004  Dysphania ambrosioides Ahart, Lowell 1981-11-6 Butte A little west of the Gray Lodge Waterfowl Management Area Headquarters, about 3/4 mile west of Pennington Road, about 12 miles south-west of Gridley 30 Comment
  CHSC94843  Dysphania botrys Lowell Ahart 2006-10-8 13438 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
  CHSC74084  Dysphania pumilio B. Castro 1996-8-20 716 Butte Ca 5 air mi N of Brush Creek, ca 0.25 mi S of Rogers Cow Camp via 'J' spur rd S of USFS Rd 23N15. 1222 Comment
  JEPS121306  Dysphania pumilio Lowell Ahart 2013-11-29 19292 Butte Below the high water line of Lake Oroville, about 250 yards W of the old road, about 3.5 air miles NE of Oroville Dam. Comment
  CHSC30278  Echinochloa colona M. S. Taylor 1978-9-8 1886 Butte Along flood control slough, ca. 4 mi n of Chico, on Hwy 99. 60 Comment
  CHSC28867  Echinochloa crus-galli J. D. Jokerst; T. B. Devine, D. Greenstein 1979-9-13 429 Butte Top of North Table Mt, ca 100 m n of the intersection of east edge of Mt and Cherokee Rd. Comment
  CHSC51287  Echinochloa crus-galli Lowell Ahart 1990-8-30 6604 Butte Along the edges of Canyon Creek, below the high water line of Lake Oroville, below the Canyon Creek Bridge across Lake Oroville. 228 Comment
  SEINET10509321  Echinochloa crus-galli Mary Susan Taylor 1979-11-11 Taylor 2284 Butte T20 N R1E. Ca. 6 mi S of Chico, on W side of Goodspeed-Watt Road. With Jim Jokerst. 34 Comment
  CAS-BOT-BC197252  Echinochloa muricata Lowell Ahart 1985-11-7 5240 Butte About 90 feet below the high water line of Lake Oroville, on the south side of the South Fork of the Feather River, where Sucker Creek flows into the river, about 1/2 mile west of the Ponderosa Dam 274 Comment
  UCD61106  Echinochloa muricata L. E. Hazeltine 1916-7-25 Butte Chico. Comment
  CDA1998  Echinochloa oryzicola J. Harroun 1958-9-16 1232 -58 Butte 0 Comment
  CDA2000  Echinochloa oryzoides G. D. Barbe, T. C. Fuller 1977-9-2 2336 Butte Rice Experiment Station, Biggs. 0 Comment
  SEINET10552489  Echinochloa oryzoides Crampton 1963-9-9 CRAMPTON 6887 Butte Butte County, 5 miles NW of Biggs, Biggs Rice Experiment Station. Comment
  CHSC115334  Elatine Lowell Ahart 2015-4-24 20070 Butte Normal size plants, on damp bare soil, bottom of a large duck field. 19 Comment
  JEPS122196  Elatine Lowell Ahart 2014-4-25 19398 Butte On the west side of Richvale South Highway, south of the intersection of Richvale West Road and Richvale South Highway, Richvale. Comment
  CHSC82228  Elatine ambigua Lowell Ahart 2002-4-10 9476 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
  JEPS122151  Elatine californica Lowell Ahart 2014-4-30 19420 Butte About 50 yards south of the Lower Honcut Road, about 50 yards west of the Railroad, about 1 3/4 miles (air) southeast of Honcut. Comment
  CHSC45276  Elatine heterandra Vernon Oswald 1988-4-5 3269 Butte Harter's Cherokee Ranch located on the w side of Hwy 99 between Hwy 149 and Dry Creek. 45 Comment
  SEINET10447969  Elatine rubella Mary Susan Taylor 1978-7-22 Taylor 1850 Butte On SE corner of Richvale East Road and Erickson Road, Richvale; in rice field. 30 Comment
  CHSC78180  Eleocharis acicularis Lowell Ahart 2000-5-27 8407 Butte Boggy area in a large spring like area, west of the lone oak tree, west of the cow chute and the large parking area on the west end of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 403 Comment
  JEPS123876  Eleocharis acicularis Lowell Ahart 2015-4-24 20062 Butte About 1 1/4 miles north of Rutherford Road, Gray Lodge Wildlife Area, about 6 1/2 miles (air) southwest of Gridley. Comment
  CHSC78181  Eleocharis acicularis var. occidentalis Lowell Ahart 2000-6-5 8447 Butte On the north margin of a large wash, about 100 yards west of the road crossing, Peter Ahart Ranch, about 1 3/4 miles north and 1 1/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. 36 Comment
  CHSC78735  Eleocharis acicularis var. occidentalis Lowell Ahart 2000-9-15 8690 Butte North of a large pond on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  UC1100617  Eleocharis atropurpurea Malcolm A. Nobs and S. Galen Smith 1949-7-29 1083 Butte 5 mi w Richland Comment
  CAS-BOT-BC113453  Eleocharis bella Lowell Ahart 1987-5-27 5694 Butte Along the North Fork of the Feather River, near the Poe Power House, ca. 2 mi SE of Jarbo Gap. 271 Comment
  CHSC34061  Eleocharis bella L. Ahart; M. S. Taylor 1981-8-15 3030 Butte On banks of the West Branch of the Feather River, ca. 1.5 mi s of Snag Lake, ca. 9 mi n of Inskip. 1500 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
  CHSC46463  Eleocharis bella V. Oswald; L. Ahart 1989-6-27 3829 Butte Humbug Rd at Butte Creek House, ca. 3.3 mi (air) se of Jonesville. Meadow along Butte Creek. 1767 Comment
  CHSC78561  Eleocharis bella Lowell Ahart 2000-9-4 8684 Butte North of a large pond on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CAS-BOT-BC113456  Eleocharis bella Lowell Ahart 1980-7-29 2510 Butte Along Lower Forbestown Road. 750 Comment
  CHSC79601  Eleocharis bolanderi G. F. Hrusa; T. D. Wilfred 1997-5-1 13710 Butte Sierra Nevada. NE side of upper end of Paradise Lake. Where last tributaries from E enter. [Lat./Long. on label is '39 52 N; 121 35 W']. 815 Comment
  JEPS98509  Eleocharis engelmannii Lowell Ahart 2000-10-21 8712 Butte About 100 feet north of Hamilton Road, about 1/8 mile east of Riceton Road, Rice Experiment Station northwest of Biggs, 2 1/4 miles (air) north of Biggs. 30 Comment
  CAS-BOT-BC112793  Eleocharis macrostachya E. B. Copeland 1931-7-15 613 Butte In and beside the Lili Pond, a permanent pool, warm in summer. Jonesville. 1750 Comment
  CHSC28829  Eleocharis macrostachya J. D. Jokerst; T. B. Devine, D. Greenstein 1979-5-18 421 Butte Top of North Table Mt, ca 1.0 mi n of east edge jct with Cherokee Rd. 381 Comment
  CHSC68429  Eleocharis macrostachya L. P. Janeway 1986-9-20 1883 Butte Inside the bend at the junction of Chico-Butte City Hwy and Road 48. 28 Comment
  CHSC68434  Eleocharis macrostachya L. P. Janeway 1986-10-19 1939 Butte Along small creek feeding Thermalito Forebay from the northeast; between the forebay and Hwy 99, and just north of Thermalito Forebay State Park picnic grounds. 67 Comment
  JEPS116007  Eleocharis macrostachya Lowell Ahart 2009-6-30 15979 Butte On wet soil, along a small flowing stream, meadow, about 55 yards southeast of the gate, about 45 yards east of Ten Mile House Road, Upper Bidwell park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 269 Comment
  JEPS98699  Eleocharis obtusa Lowell Ahart 2000-9-4 8685 Butte Along the west margin of a large pond on the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CHSC117404  Eleocharis pachycarpa B. Castro; Tom Boullion, Jessica Boyt 2008-10-21 1771 Butte Sacramento Valley. Ca 3.5 mi SE of Chico, 3 mi NE of Durham, near W edge of Butte Creek ca 0.5 mi upstream of its crossing under the Oro-Chico Hwy. 57 Comment
  JEPS98717  Eleocharis pachycarpa Lowell Ahart 2000-5-23 8387 Butte 13 mi SE of Oroville (NE of the pond, 1/8 mi N of La Porte Road, 1/2 mi SE of Honcut Cemetery, 4 mi NE of Honcut) 54 Comment
  SEINET3441884  Eleocharis palustris Unknown 2000-7-7 8556 Butte Feather Falls, Feather Falls, about 5 air miles northeast, about 3 miles north of Lumpkin Ridge Road, small seep just west of the bridge across Fall River on the north side of Fall River 1030 Comment
  CHSC46473  Eleocharis quadrangulata Vernon Oswald 1989-6-29 3836 Butte Vandergrift Lake located on the w side of Cana Pine Creek Rd just s of the Tehama County line. 54 Comment
  CHSC45178  Eleocharis quinqueflora Lowell Ahart 1970-4-4 39 Butte On the bottom of a small wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/2 miles east of Honcut, about 12 miles south of Oroville. 39 Comment
  JEPS98350  Eleocharis quinqueflora Lowell Ahart 2000-6-29 8542 Butte 5 air miles E of Magalia (by the road culvert, NW side of Concow Road at Flea Meadow, about 1/2 mi W of Flea Mountain, 3 1/2 air miles N of Concow Reservoir) 1036 Comment
  JEPS115253  Eleocharis radicans Lowell Ahart 2008-11-4 15403 Butte On the sides of Potter Ravine, in shallow water, below the high water line of Lake Oroville, about one mile north of the large parking area on the north end of Oroville Dam, about 5 miles (air) northeast of Oroville 242 Comment
  JEPS98610  Eleocharis rostellata Lowell Ahart 2000-6-21 8501 Butte In a large seep, on the west side of the dirt road at Parking Area L, just west of the Diversion Dam, Upper Bidwell Park, about 2 1/2 miles (air) northeast of Manzanita Avenue, Chico. 106 Comment
  CHSC46880  Eleocharis suksdorfiana Vernon Oswald 1989-8-29 3971 Butte Boy Scout Camp at Chico Meadows, ca. 1 mi n of Butte Meadows. Bogs on the sloping meadow bordering Big Chico Creek near the impounded 'swimming hole. 1280 Comment
  CHSC94339  Eleocharis suksdorfiana Lowell Ahart 2006-7-25 13059 Butte In shallow water, 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
  UC1564750  Eleocharis suksdorfiana V. Oswald and L. Ahart 1989-8-15 3936 Butte N of and visible from Soda Ridge Road, 1.4 mi W of its junction with Coon Hollow Road, 1.2 air mi N of Philbrook Reservoir 1752 Comment
  SEINET3441890  Eleocharis suksdorfiana Unknown 2000-7-5 8552 Butte Stirling City, Stirling City, about 4.5 miles north, about 1 mile south of Inskip, about 100 yards west of the skyway 1310 Comment
  JEPS102306  Elodea canadensis Lowell Ahart 2001-7-6 8883 Butte 12 mi SE of Chico (small pond W of a lg. pond, lg. overflow area on E side of Sacramento River, NW of Parrott Landing, 1 mi SE of Ord Ferry, 2 mi SE of Ord bend[sic]) 32 Comment
  CHSC11333  Elymus caput-medusae Lowell Ahart 1970-5-12 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC56639  Elymus caput-medusae J. Lund 1980-4-18 Butte 0.9 mi east of Hicks Lane on the south side of Keefer Road, ca 50 ft from the edge of the road. 91 Comment
  CHSC40457  Elymus elymoides subsp. elymoides Lowell Ahart 1985-6-30 5091 Butte 100 yards south of the road to the Forbestown Res., south of the Forbestown Ditch, about 2 1/2 miles north-east of Forbestown. 883 Comment
  CAS-BOT-BC203419  Elymus glaucus subsp. glaucus Lowell Ahart 1988-7-31 6165 Butte About 1 air mile north-east of Bald Mountain, about 4 1/2 air miles north-east of Stirling City 1676 Comment
  CHSC49541  Elymus glaucus subsp. jepsonii Vernon Oswald 1985-6-3 1801 Butte Spur road on the e side of Hwy 32 0.1 mi s of Platte Mtn. Lookout. 1066 Comment
  CAS-BOT-BC234103  Elymus multisetus Lowell Ahart 1977-5-20 1508 Butte Peter Ahart Ranch, Honcut 50 Comment
  CAS-BOT-BC234106  Elymus multisetus John Thomas Howell 1955-6-14 30461 Butte Magalia 731 Comment
  CHSC117316  Elymus ponticus L. P. Janeway 2016-6-2 12103 Butte Northern High Sierra Nevada. Plumas National Forest; Fileds Ridge Meadow; on the ridge between South Fork Feather River and Sucker Run; 1.5 air-km east-northeast of Ponderosa Reservoir. 872 Comment
  UC591542  Elymus trachycaulus H. F. Copeland 1935-7-25 Butte Jonesville Comment
  CHSC41306  Elymus trachycaulus subsp. subsecundus S. C. Morey 1983-7-22 542 Butte Cherry Hill Meadow. On n side of Humboldt Rd., ca. 3.2 mi e of Butte Meadows. 1414 Comment
  CHSC42951  Elymus trachycaulus subsp. subsecundus Lowell Ahart 1987-7-3 5789 Butte On a gravel bar, along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CAS-BOT-BC410232  Enemion occidentale Flower Shaw 1926-4-24 s.n. Butte Los Verjils Comment
  SEINET12192833  Epilobium adenocaulon M. S. Taylor 1975-1 954 Butte ca 1 mi S of Paradise, E side of Kunkle Reservoir, ca 500 yds E of Pentz-Magalia Hwy 610 Comment
  UC203661  Epilobium brachycarpum A. A. Heller 1914-8-20 11689 Butte along creek about 5 mi s Pentz; Dry Creek Comment
  CHSC12029  Epilobium canum subsp. latifolium R. N. Bowman 1971-9-27 56 Butte Ca. 2.0 mi. se of intersection of Skyway and Coutelenc Rd. and ca. 200 yds. sw of Coutelenc Rd. 121 Comment
  CHSC30765  Epilobium canum subsp. latifolium M. S. Taylor 1980-9-27 3344 Butte S side of Hwy 70, at Butte-Plumas county line, on granite wall. 548 Comment
  CHSC25258  Epilobium ciliatum subsp. ciliatum M. S. Taylor 1977-6-26 1375 Butte In tiny creek along s side of Ponderosa Way, ca. 2 mi e of Cohasset. 609 Comment
  CHSC94256  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2006-7-16 12986 Butte On the east side of Willow Creek, on the east side of a large meadow and bog, about 200 yards southeast of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1569 Comment
  SEINET6637246 Image available Epilobium ciliatum subsp. ciliatum H. F. Copeland 1927-1 413 Butte Jonesville 1524 Comment
  CHSC28438  Epilobium cleistogamum J. D. Jokerst 1979-5-12 285 Butte Adjacent to Vernal Pools, ca. 1.0 mi. S.E. of Chico Muni Airport, E. of Cohasset Hwy. Comment
  CHSC28746  Epilobium densiflorum R. A. Schlising 1979-9-6 3487 Butte Above Butte Meadows, along Humboldt Road, 1.5 mi S of Lassen Nat. Forest boundary and 1.1 mi N of road to Stirling City. In ditches at roadside. Comment
  RSA0117083  Epilobium densiflorum Lowell A. Ahart 2015-6-6 20203 Butte About 20 yards north of the dirt road, about 5/8 mile northwest of the iron gate along Cherokee Road, Beatson Hollow, North Table Mountain, about 7 miles (air) north of Oroville. 305 Comment
  RSA724889  Epilobium glaberrimum subsp. glaberrimum L. Ahart 2006-8-15 13187 Butte 5 yards west of Willow Creek, about 100 yards southeast of the cabin, about 3/4 mile (air) NW of Jonesville, about 5 miles (air) NE of Butte Meadows 1570 Comment
  UC1564801  Epilobium glaberrimum subsp. glaberrimum V. Oswald and L. Ahart 1989-7-12 3856 Butte road between Inskip and Jones Meadow (roadside drainage); Fish Creek 1432 Comment
  POM184018  Epilobium lactiflorum H. F. Copeland 1932-08 s.n. Butte Butte County: In Springs near Crest of ridge SE of the head of Butte Creek. 2000 Comment
  CHSC48632  Epilobium minutum Vernon Oswald 1987-6-2 2943 Butte Butte-Yuba County line about 3 mi ne of Forbestown, on the se side of Forbestown Reservoir Rd. 883 Comment
  SEINET12194592  Epilobium minutum Unknown 1985-1 4970 Butte N of Oroville, W of Lunt Road, ca 0.5 mi N of intersection of Lunt Rd. and Rt. 70, N of Yankee Hill 503 Comment
  CHSC28378  Epilobium obcordatum M. S. Taylor; J. Jokerst 1979-7-21 2149 Butte Humboldt Peak, at Humboldt Summit. 2151 Comment
  UC725392  Epilobium torreyi A. A. Heller 1938-5-22 15107 Butte near Chico Airport (in field just above the alluvial valley proper) 91 Comment
  CAS-BOT-BC57996  Equisetum arvense E. B. Copeland 1930-6-28 402 Butte Jonesville. 457 Comment
  CHSC66067  Equisetum arvense Vernon H. Oswald 1996-5-22 7618 Butte U. S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Sacramento River National Wildlife Refuge, Llano Seco Unit. 30 Comment
  SBBG28789  Equisetum hyemale E. B. Copeland 1929-7-6 Butte Jonesville Comment
  CHSC63793  Equisetum laevigatum Gerald A. Winter 1989-4-15 16 Butte Ca. 1 yd from n side of Big Chico Creek, ca. 100 yds e of diversion dam but before salmon hole. 60 Comment
  SEINET10508795  Eragrostis diffusa Lowell Ahart 1984-8-19 Ahart 4790 Butte West of Pacific Heights Road, about 5 miles south-west of Oroville. Comment
  CHSC66857  Eragrostis hypnoides Vernon H. Oswald 1996-9-30 8292 Butte Northern Sacramento Valley. Sacramento River National Wildlife Refuge, Llano Seco Unit. Llano Seco Rancho between 7 Mile Lane and the Sacramento River. On the margin of Angel Slough on the W side of Tract 4.1, Sanctuary I. [Label says 'T20N R01W S15 SE1/4 of NW1/4']. 30 Comment
  UC1562294  Eragrostis hypnoides Lowell Ahart 1990-7-15 6557 Butte about 1.25 mi nw Enterprise Bridge across Lake Oroville (e of Enterprise Boat Launch Area, just below the high water line of Lake Oroville); Lake Oroville 243 Comment
  UCD63884  Eragrostis mexicana subsp. virescens John Thomas Howell 1959-9-20 34675 Butte Sierra Nevada, lower foothills, eastern outskirts of Oroville. 60 Comment
  CAS-BOT-BC284082  Eragrostis pectinacea var. pectinacea Lowell Ahart 1986-11-7 5428 Butte East of the Feather River, north of the Oroville Gridley Highway about 3 miles east of Gridley 28 Comment
  CHSC30530  Eragrostis pectinacea var. pectinacea M. Merryman; R. Banchero 1979-9-23 48 Butte SW of Chico, just e of Ord Ferry and Sacramento River. Riverbank. 30 Comment
  UCD169455  Eragrostis pectinacea var. pectinacea Lowell Ahart 2004-9-14 11402 Butte East part of Palermo, on the east side of Palermo Honcut Highway, about 20 feet south of Palermo Road. 57 Comment
  CHSC45106  Eragrostis pilosa var. pilosa Lowell Ahart 1988-8-10 6169 Butte On the south edge of Pentz Road, about 1 mile east of Highway 99. 60 Comment
  SEINET10873980  Eremocarpus setiger Mary Susan Taylor 1982-8-16 Taylor 4989 Butte T24N R4E sw/se sec 28. Paradise NE quad. S end of Stirling City, along both sides of the Skyway. Mixed Evergreen Forest; 3400 ft. 1036 Comment
  NY43577  Eremocarpus setigerus S. Bianco 1995-1-9 1024 Butte Messilla Valley Rd, 0.8km from interection of Durham & Pentz Rd 134 Comment
  CHSC92525  Eremogone cliftonii Samantha Mackey Hillaire; Matt Brown, Lawrence Janeway, Jamie Lewis 2005-5-4 1216 Butte North of Pulga/Mayaro area. 1018 Comment
  RSA4145  Ericameria bloomeri E. B. Copeland 1930-8-26 493 Butte Jonesville 1550 Comment
  CHSC41877  Ericameria nauseosa var. speciosa Lowell Ahart 1986-10-16 5400 Butte South of the Forbestown Ditch, about 2 1/2 miles north-east of Forbestown. 868 Comment
  CDA14082  Erigeron annuus G. F. Hrusa, T. D. Wilfred 1997-7-3 13966 Butte Sierra Nevada; NE side of upper end of Paradise Lake. Where last tributaries from E enter. Comment
  CHSC41875  Erigeron 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. 289 Comment
  CHSC78992  Erigeron canadensis Lowell Ahart 2000-11-4 8716 Butte Just north of Rich Gulch Road, about 1 mile north of the West Branch Bridge across Lake Oroville, about 5 miles (air) southeast of Paradise. 335 Comment
  CAS-BOT-BC300687  Erigeron glacialis var. glacialis Vernon Oswald; Lowell Ahart 1987-7-1 3071 Butte Cluster of 3 snow lakes ca. 3 mi (air) s of Humbug Summit, 0.5 mi w of the Butte-Plumas county line, ca. 5.5 mi (air) se of Jonesville 1935 Comment
  UC600738  Erigeron glacialis var. glacialis H. F. Copeland 1932-8-22 Butte spring on ridge se of the head of Butte Creek; Jonesville 2100 Comment
  CAS-BOT-BC295162  Erigeron inornatus Lowell Ahart 1983-8-16 4284 Butte Along the edge of Humboldt Road, about 3 miles south-west of Butte Meadows 1450 Comment
  CAS-BOT-BC295163  Erigeron inornatus Lowell Ahart 1983-7-24 4206 Butte At the Forbestown Res., about 5 miles north-east of Forbestown 450 Comment
  POM180882  Erigeron philadelphicus H. F. Copeland 1923-4-21 870 Butte Canyon of Chico Creek Comment
  CHSC20971  Erigeron sumatrensis M. S. Taylor 1975-9-8 903 Butte Along Big Chico Creek, California State University, Chico, campus. 60 Comment
  CHSC100467  Eriobotrya japonica Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15419 Butte On the west side of Cedar Grove, Lower Bidwell Park, Chico. 67 Comment
  RSA0037008  Eriochloa acuminata var. acuminata Lowell A. Ahart 2013-10-12 19108 Butte On the east side of Palermo Honcut Highway, about 20 yards south of Palermo Road, Palermo. 51 Comment
  RSA769683  Eriodictyon californicum L. Ahart 2009-4-22 15591 Butte W side of Guardians Trail, about 100 yards N of Pine Trail, Upper Bidwell Park, W of the intersection of Highway 32 and Ten Mile House Road, about 10 miles NE of Chico. 382 Comment
  CAS-BOT-BC261717  Eriogonum nudum var. oblongifolium John Thomas Howell 1975-6-15 51120 Butte Paradise. Skyway near Clark Road 609 Comment
  JEPS87618  Eriogonum nudum var. oblongifolium Lowell Ahart 1994-10-16 7563 Butte about 3/4 mi sw along dirt road Forbestown Reservoir Dam (near creek, about 2 air mi n and 3 1/2 mi e of Forbestown); Woodleaf Creek 762 Comment
  CAS-BOT-BC269841  Eriogonum nudum var. pubiflorum E. B. Copeland 1930-7-16 s.n. Butte Jonesville 1500 Comment
  JEPS94932  Eriogonum umbellatum var. ahartii Lowell Ahart 1997-8-19 7870 Butte about 8 air mi ne of Feather Falls (on s side of Lumpkin Ridge Road, about 1 1/2 mi e of Camp 18,); s side of Lumpkin Ridge Road 1280 Comment
  UCD101521  Eriogonum vimineum John Thomas Howell 1955-6-15 30511 Butte West Branch of Feather River. 182 Comment
  JEPS103610  Eriogonum wrightii var. trachygonum Lowell Ahart 2002-10-16 9981 Butte On the N side of North Honcut Creek, Peter Ahart Ranch, ca 1 1/4 miles N and 2 3/4 miles E of Honcut, ca 12 miles (air) SE of Oroville. 42 Comment
  CAS-BOT-BC308080  Eriophyllum lanatum var. achilleoides Clarence R. Quick 1964-7-9 64 -51 Butte North of Jarbo Gap, Sierra Nevada Comment
  CHSC38069  Eriophyllum lanatum var. croceum R. E. Preston 1982-6-25 316 Butte Edge of meadow; site of Powellton. 1108 Comment
  CHSC48155  Eriophyllum lanatum var. croceum Vernon Oswald; M. S. Taylor 1985-5-30 1792 Butte Big Bar Mt. Rd. 0.4 mi s of Coyote Gap. 1292 Comment
  CAS-BOT-BC308170  Eriophyllum lanatum var. grandiflorum A. A. Heller 1914-6-22 11484 Butte North slope at Little Summit near Butte Meadows 1463 Comment
  SFV3892  Eriophyllum lanatum var. grandiflorum M. L. Vincent 1960-9-8 94 Butte Sierra Nevada Paradise. In lot across street from 5330 Harrison Road. 525 Comment
  RSA92670  Eriophyllum lanatum var. grandiflorum F. W. Peirson 1926-6-21 6766 Butte About 10 miles east of Chico on Humboldt Road Comment
  SEINET10475230  Eriophyllum lanatum var. grandiflorum Mary Susan Taylor 1981-5-21 Taylor 3776 Butte T22N R4E nw/nw sec l and ne/ne sec 2, Pulga SW quad. S side of Concow Rd, ca. 0.5 mi S of its jct with Ponderosa Way (Rim Rd), ca. 20 air mi N of Oroville. In reddish weathered serpentine; 2800 ft. 853 Comment
  JEPS114969  Erodium cicutarium Lowell Ahart 2008-5-21 14765 Butte 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
  UC762232  Erodium macrophyllum R. F. Hoover 1937-5-18 2230 Butte 2 mi s Nelson Comment
  UCR88747  Eryngium articulatum Lowell Ahart 1987-7-19 5839 Butte Sacramento Valley, along the Midway, 0.5 mile south of Durham 45 Comment
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Oct 10 2010
  UC1487246  Eryngium castrense Yusuf Sheikh 1975-7-9 606 Butte e. Briggs (on Hamilton Rd. ca. 0.5 mi. from intersection w/ State Hwy. 99) Comment
  CAS-BOT-BC40746  Erysimum capitatum A. A. Heller 1915-4-12 11811 Butte Near Cohasset. Comment
  CHSC42864  Erythranthe breweri Lowell Ahart 1987-5-12 5633 Butte South of Lumpkin Ridge Road, 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls. 1280 Comment
  CHSC50115  Erythranthe filicifolia Vernon Oswald 1990-4-30 4175 Butte Fall River at the head of the falls, reached via Feather Falls Trail. At the mouth of the drainage from California Nutmeg Spring. 579 Comment
  CHSC105774  Erythranthe glaucescens Christopher T. Ivey 2010-6-7 377 Butte Honey Run Road, 7.7 km NE of bridge crossing Butte Creek, in roadside ditch. 427 Comment
  CHSC62829  Erythranthe glaucescens Ella Icard 1893-1-1 Butte Comment
  CHSC87424  Erythranthe glaucescens R. D. Fischer 2004-3-20 114 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition along Hwy. 32. Along drainage on Guardian Trail. UTM: 10609595E 4405947N. 384 Comment
  SEINET13976392 Image available Erythranthe grandis A. A. Heller 1938-1 15028 Butte Table Mountain 305 Comment
  CHSC112695  Erythranthe guttata Lowell Ahart 2013-7-1 18821 Butte Seep along road gutter, 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
  CHSC113285  Erythranthe guttata Lowell Ahart 2014-5-13 19465 Butte Below the high water line of Lake Oroville, about 200 yards southwest of the poor parking area, on the east side of McCabe Creek, about 11 miles (air) east of Oroville. 244 Comment
  CHSC116308  Erythranthe guttata Lowell Ahart 2015-11-18 20662 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
  CHSC44669  Erythranthe guttata R. Banchero 1980-6-6 202 Butte Along Bald Rock Rd 1.7 mi S of the N jct with Hwy 162, 7.6 mi NE of the S jct with Hwy 162, ca 1/4 mi E of the Rd. 963 Comment
  CHSC3988  Erythranthe microphylla E. P. Parreno 1967-3-30 Butte 20 yards South of Horseshoe Lake. Comment
  CHSC44679  Erythranthe microphylla R. Banchero 1980-5-23 161 Butte Along Nelson Bar Rd 1.0 mi SW of its jct with Lunt Rd. 432 Comment
  CHSC44783  Erythranthe microphylla R. Banchero 1980-4-7 89 Butte Along LaPort Rd 3.4 mi S of its jct with the Ord-Bangor Hwy, 0.1 mi SW of the jct of LaPorte and Kings Ranch Rd. 137 Comment
  CDA14073  Erythronium multiscapideum G. F. Hrusa, T. D. Wilfred 1997-5-1 13720 Butte Sierra Nevada; NE side of upper end of Paradise Lake. Where last tributaries from E enter. Old growth Douglas-fir/mixed hardwoods. Comment
  CHSC31344  Erythronium multiscapideum Leslie Steidl 1980-4-13 17 Butte Ca. 23 mi ene of Oroville, ca. 0.7 mi nne of Lumpkin Rd, ca. 0.25 mi w of Nutmeg Creek, ca. 5 yd e of a dirt road. 719 Comment
  CHSC42009  Erythronium multiscapideum Lowell Ahart 1976-4-15 1080 Butte Along Swede's Flat Road, about 2 miles east of the Bangor Oroville Highway, north-east of Bangor. 457 Comment
  UC1485466  Erythronium multiscapideum M. S. Taylor 1981-4-8 3516 Butte open reddish serpentine slope ca 1/10 mi s jct of Concow Road and Ponderosa Way (ca 7 mi n of Jarbo Gap on Hwy 70, ca 22 air mi n of Oroville); Pulga SW Quad 975 Comment
  SEINET10839630  Erythronium multiscapideum Lowell Ahart 1983-4-14 Ahart 3934 Butte Ca. 3/8 mi sw of the Forbestown Reserv., ca. 4 mi ne of Forbestown. Yellow Pine Forest; 450 m. 450 Comment
  SEINET12094433  Eschscholzia caespitosa K. T. Pomeroy 1988-1 14 Butte ca 9.6 km N of Oroville, 75 m W of Table Mountain-Cherokee Road 245 Comment
  CAS-BOT-BC402962  Eschscholzia californica Lowell Ahart 1980-5-12 2262 Butte Peter Ahart Ranch, Honcut 50 Comment
  CHSC112099  Eschscholzia californica Lowell Ahart 2012-6-21 18220 Butte On the south side of Big Chico Creek, about 5 yards east of the Freewy, Lower Bidwell Park, Chico. 62 Comment
  CHSC24152  Eschscholzia lobbii B. Bunge 1976-4-20 15 Butte Ca. 100 yd of Skyway, 5 mi ese of Chico. 213 Comment
  CHSC27672  Eschscholzia lobbii Robert A. Schlising 1978-4-23 3224 Butte S of Cohasset along Cohasset Road, 4.9 mi NE of jct with Richardson Springs Road, 4.9 mi NE of jct with Richardson Springs Road and 5.2 mi NE crossing of Mud Creek. Comment
  CHSC3564  Eschscholzia lobbii R. D. Briggs 1966-3-6 63 Butte North end of Bidwell Park golf course, Chico. Comment
  CAS-BOT-BC419504  Eschscholzia lobbii A. A. Heller 1914-3-7 11188 Butte Hills 8 miles north of Oroville Comment
  CHSC48616  Eucalyptus rudis Vernon Oswald 1987-7-4 3089 Butte Rancho Aquas Frias. Nelson West Rd. at 7-Mile Lane, between Chico and Butte City. 30 Comment
  SEINET10453750  Euphorbia crenulata Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4069 Butte T20N R5E sec 5. Along Bloomer Hill Rd, ca. 0.5 mi w of Oroville-Quincy Hwy, ca. 15 mi ne of Oroville. Foothill Woodland. 400 Comment
  CHSC104841  Euphorbia maculata Lowell Ahart 2010-6-25 16838 Butte In the planter areas, in the parking area at Bidwell Mansion, Chico. 60 Comment
  SEINET8687814 Image available Eurybia radulina K. Conger 1907-1 151 Butte Brush creek Comment
  CHSC31589  Euthamia occidentalis L. Ahart 1977-9-20 1571 Butte Along the edges of North Honcut Creek. Peter Ahart Ranch, Honcut. 50 Comment
  CHSC60481  Euthamia occidentalis K. R. Stern 1972-9-19 3783 Butte Perkins Lake, Llano Seco Rancho, ca. 10 mi sw of Chico. Comment
  JEPS121967  Fallopia convolvulus Lowell Ahart 2014-7-7 19558 Butte About 5 yards east of the Skyway, about one-mile north of Stirling City. Comment
  CHSC109356  Fallopia japonica T. M. Hanson; Melanie Williams 2012-10-11 Butte Northern Sierra Nevada. Plumas National Forest; on the southwest side of the North Fork Feather River 200 m southwest of Bardees Bar. 328 Comment
  CHSC20093  Fatsia japonica M. S. Taylor 1975-4-8 450 Butte On ne side of Administration Building, California State University, Chico. 60 Comment
  CAS-BOT-BC278301  Festuca californica subsp. californica V. Oswald; L. Ahart 1988-6-17 3398 Butte North side of the dam at Lost Creek Reservoir 1005 Comment
  CHSC109625  Festuca myuros Lowell Ahart 2012-6-17 18081 Butte On the north side of Big Chico Creek, southeast of Table 21, south of the paved park road, northeast of the Deer Pen, Lower Bidwell Park, Chico. 73 Comment
  CHSC113277  Festuca myuros var. hirsuta Lowell Ahart 2014-4-9 19331 Butte West edge of Pennington Road, at the intersection of Pennington Road and Colusa Highway, about 6 miles west of Gridley. 22 Comment
  CAS-BOT-BC278798  Festuca occidentalis Lowell Ahart 1984-6-10 4704 Butte Along the road about 2 miles south-west of the Forbestown Diversion Dam, north-east of Forbestown 700 Comment
  CHSC61369  Festuca subulata Lowell Ahart 1993-7-23 7107 Butte On the sides of a stream, south of Fall River, about 1/8 mile south of the campgrounds on the large gravel bar along Fall River, about 6 (air) miles north-east of Feather Falls. 1036 Comment
  JEPS113262  Festuca subuliflora Lowell Ahart 2007-5-22 13915 Butte About 1/8 mile south of Bald Rock Dome, on the west 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 844 Comment
  CHSC34215  Fragaria vesca M. S. Taylor 1981-4-28 3571 Butte N side of 23N28.2, at jct of Chico Creek, ca. 4 mi e of Jarbo Gap on Hwy 70, ca. 23 air mi nw of Oroville. 853 Comment
  CAS-BOT-BC437084  Fragaria virginiana subsp. platypetala E. B. Copeland 1929-7-16 373 Butte Jonesville 1550 Comment
  LA207663  Frangula californica subsp. tomentella A. A. Heller; 1915-5-16 11869 Butte Chico-Centerville rd 3 mi. from Chico Comment
  SJSU7511  Frangula californica subsp. tomentella L. S. Rose 1968-6-12 68113 Butte Feather R Canyon, Pulga 487 Comment
  CAS-BOT-BC55657  Frangula purshiana C. R. Quick 1953-8-11 53 -126 Butte Rag Dump Meadow se. of Stirling City Comment
  CDA38769  Fraxinus dipetala L. Ahart 2012-4-2 17896 Butte On the west side of South Rim Trail, about 5/8 mile west of Highway 32, about 8 1/2 mile northeast of Chico, south part of Upper Bidwell Park. Comment
  LA50892  Fraxinus dipetala s.n. Butte between the 14 mi. house and Forest Ranch 731 Comment
  CHSC94613  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
  CHSC9279  Fritillaria affinis D. C. Burns 1971-3-6 99 Butte Ca. 1 mi e of the intersection of Manzanita Ave. and Centenial Ave. (lower Big Chico Creek Canyon, called the Fern Banks). 82 Comment
  CAS-BOT-BC504405  Fritillaria atropurpurea Mrs. C. C. Bruce 1897-1-1 484 Butte Unspecified Comment
  CAS-BOT-BC508144  Fritillaria recurva C. C., Mrs. Bruce 1897-1-1 2026 Butte Unspecified Comment
  CHSC54347  Galium aparine Lowell Ahart 1991-4-19 6646 Butte 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 south-east of Oroville. 45 Comment
  CHSC82424  Galium aparine Lowell Ahart 2002-5-7 9630 Butte High banks of a pond, at the beginning of a southeast 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
  UC195388  Galium bolanderi A. A. Heller 1914-7-24 11627 Butte slopes near Forest Ranch 731 Comment
  SEINET10836823  Galium bolanderi Mary Susan Taylor 1981-5-29 Taylor 3815 Butte T22N R5E ne sec 22, Pulga SW quad. Chino Ridge, ca. 0.5 mi N of 22N31, ca. 3 air mi SE of Pulga. Along trail up ridge; filtered to open light. Comment
  SEINET10968826  Galium bolanderi Mary Susan Taylor 1981-5-5 Taylor 3611 Butte 600 ft. T20N R6E sw sec 2, Forbestown quad. W side of spur rd, ca. 1.5 air mi NW of its jct with Bryant Ravine Rd(21N35Y), ca. 1 air mi N of Feather Falls community. Green grassy woodland with heavy shrub cover, nne-facing slope; 792 Comment
  JEPS127203  Galium parisiense Lowell Ahart 2016-6-4 20925 Butte About 100 yards north of McCabe Creek, about 3 miles (air) west of Forbestown. Comment
  RSA81683  Galium parisiense Roxana S. Ferris 1952-5-16 12475 Butte 5 miles S of Cherokee on road to Oroville. Comment
  CHSC64216  Galium porrigens var. tenue Mike Carpenter 1990-3-30 13 Butte Ca. 450 ft. E of Forbes Town Rd. Ca. 1.1 mi S of the intersection of Hwy. 162 and Forbes Town Rd. 728 Comment
  UC600429  Galium trifidum var. pusillum H. F. Copeland 1930-7-28 Butte S. Willow Creek Jonesville 1828 Comment
  CHSC39346  Gamochaeta argyrinea Lowell Ahart 1983-6-26 4152 Butte Along the edge of Ponderosa Way, about 1 1/2 miles south-east of the East Fork of Canyon Creek, about 14 1/2 miles north-east of Oroville. The sign gives Big Bridge Road instead of Ponderosa Way. 575 Comment
  UC1562409  Gamochaeta argyrinea Lowell Ahart 1990-6-16 6523 Butte below high water line Lake Oroville (about 1/2 mi sw of Enterprise Bridge across Lake Oroville) 259 Comment
  UCD159565  Gamochaeta ustulata D. S. Park 2011-6-24 302 Butte Growing on edges of Thermalito Afterbay. 43 Comment
  RSA724925  Garrya fremontii L. P. Janeway, Dan Lubin 2006-5-3 8573 Butte Northern High Sierra Nevada; south side of the ridge between Sawmill Peak and Jordan Hill Road; 600 meters east-southeast of the Sawmill Peak Lookout. 954 Comment
  CHSC65212  Gastridium phleoides Lowell Ahart 1995-5-30 7584 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
  CHSC8595  Gastridium phleoides M. Banning 1969-4-18 83 Butte Table Mt., 1/2 mi. S. of Oregon City junction 30' inside fence. 487 Comment
  CDA31993  Gastridium ventricosum L. Ahart 2008-5-12 14780 Butte Below the high water line of Lake Oroville, on the north side of the South Fork of the Feather River, where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile northwest of the Ponderosa Dam. Comment
  CHSC25423  Gayophytum heterozygum Hayes; Warner 1977-9-11 60 Butte Along shoulder, Hwy 32, ca. 2 m s of road, exactly 24.6 mi e of Hwy 99 overpass on Hwy 32 in Chico. 914 Comment
  CAS-BOT-BC208055  Genista monspessulana John Thomas Howell 1962-6-16 37574 Butte Magalia 731 Comment
  RSA754951  Gentiana newberryi var. tiogana Robert A. Schlising, A. Kannely 2006-10-26 4467 Butte Butte Creek House Meadow Ecological Reserve, about 3 miles east of Jonesville, along Humbug Road. 1768 Comment
  CHSC94438  Gentianopsis simplex L. P. Janeway 2006-8-12 8846 Butte Northern High Sierra Nevada. Meadow at head of northwestern branch of Keyser Creek, below sharp bend in Concow Road, 0.3 km east of the summit of Bald Mountain. 1695 Comment
  UCD103375  Geranium dissectum R. N. Raynor; H. A. Hannesson 1941-5-9 s.n. Butte Feather River, 4 mi. S. of Oroville. Comment
  CHSC38455  Geranium molle Vernon Oswald 1983-3-31 233 Butte Upper Bidwell Park, Chico, ca. 300 ft n of Upper Park Rd. near Parking Area R (Yahi Trail to Brown's Hole); about 2.3 mi e of the power lines. 243 Comment
  CHSC52341  Geranium molle Paulenn Broyles 1987-5-21 1047 Butte The Nature Conservancy Vina Plains Preserve. Wurlitzer Addition. At fence roadway NW of Wurlitzer buildings. Comment
  SEINET10495130  Geranium molle Mary Susan Taylor, K. Tharp 1982-4-8 Taylor 4284 Butte T19N R4E sw/ne sec l. Oroville Dam quad At end of Beckwith Rd just above Oroville Dam overlook parking area, Oroville. Foothill Woodland; 1050 ft. 320 Comment
  CHSC29381  Geum macrophyllum R. A. Schlising; D. Ikeda, R. Banchero 1980-6-23 3763 Butte Near Strawberry Valley, 1.6 mi N of La Porte Road (=1.8 mi S of S end dam for Sly Cr. Res.). Roadside seep. Comment
  CHSC93994  Geum macrophyllum R. D. Fischer 2004-6-20 766 Butte Sierra Nevada Mountains, north-east corner of Butte County and ca. 4 miles north of Butte Meadows off Scout Road. Boy Scout Camp. Plants found along stream edge downstream of pond. 1371 Comment
  CDA13726  Gilia capitata subsp. mediomontana G. F. Hrusa, T. D. Wilfred 1997-6-27 13904 Butte Sierra Nevada; Feather Falls/Cascade Rd. to USFS 21N22Y, 1 km. E to summit. Comment
  UC134005  Gilia capitata subsp. mediomontana Mrs. R. M. Austin 1899-7-1 833 Butte Colby Comment
  UC726804  Gilia capitata subsp. mediomontana A. A. Heller 1937-5-31 Butte Yankee Hill Comment
  CHSC102506  Gilia capitata subsp. pedemontana Lowell Ahart 2009-5-30 15784 Butte North of a broad open drainage in oak woodland, about 100 yards north of the dirt road which is Ten mile House Road, Upper Bidwell Park, about 1/2mile (air) west Highway 32, about 10 miles northeast of Chico. 269 Comment
  CHSC40922  Gilia capitata subsp. pedemontana Ahart; Jokerst 1985-5-10 4953 Butte 10 yards north of the east branch of Potter Ravine, about 2 1/4 miles north of Oroville Dam. 320 Comment
  CHSC44413  Gilia capitata subsp. pedemontana Lowell Ahart 1988-5-30 6028 Butte Near the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  RSA21312  Gilia capitata subsp. pedemontana Carl B. Wolf 1937-5-13 8657 Butte Sierra Nevada Foothills, W side of So. Honcut Creek, 2 6/10 mi E of Bangor. 213 Comment
  SEINET12350112  Gilia tricolor subsp. tricolor Unknown 1998-4-11 7 Butte Chico, Upper Bidwell Park about 1 km E of Horseshoe Lake, along gravel road that follows Chico Creek 104 Comment
  SEINET10464588  Githopsis specularioides Mary Susan Taylor, James D. Jokerst 1980-4-18 Taylor 2526 Butte On east side of Humbug road, about 3 miles southwest of Nimshew 518 Comment
  SEINET10464754  Githopsis specularioides Lowell Ahart 1985-5-15 Ahart 4967 Butte West of Lunt Road, about 1/2 mile north of the inter- section of Lunt Road and Highway 70, north of Yankee Hill, N of Oroville. 503 Comment
  CHSC46690  Glyceria borealis V. Oswald; L. Ahart 1989-8-15 3938 Butte Soda Ridge Rd, 1.4 mi w of its junction with Coon Hollow Rd, ca. 1.2 mi (air) n of Philbrook Reservoir. In lake n of and visible from the road. 1752 Comment
  CDA2162  Glyceria declinata L. Ahart 2000-5-21 8377 Butte On the east side of Clark Road (Highway 191), about 200 yards south of Dry Creek, about 10 miles (air) northwest of Oroville. Comment
  JEPS98452  Glyceria declinata Lowell Ahart 2000-5-21 8377 Butte 10 mi NW of Oroville (slickens from the Cherokee mine, E side of Clark Road (Hwy 191), 200 yds S of Dry Creek) 60 Comment
  CHSC43176  Glyceria elata Robert Banchero 1981-7-19 611 Butte Big Crane Valley. Meadow. 1584 Comment
  RSA126641  Glyceria striata P. L. Johannsen 1936-7-17 939 Butte Butte County: 3 miles SE of Butte Meadows, Paynes Creek. 1555 Comment
  CAS-BOT-BC302468  Gnaphalium palustre A. A. Heller 1915-5-28 11911 Butte Near Cohasset Comment
  CHSC38354  Gnaphalium palustre Vernon Oswald 1983-6-3 620 Butte Upper Bidwell Park, Chico, at Horseshoe Lake. 100 Comment
  CHSC75960  Gnaphalium palustre Lowell Ahart; Vernon H. Oswald 1999-8-13 8166 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
  JEPS120700  Gnaphalium palustre Lowell Ahart 2013-10-26 19207 Butte On south side of Philbrook Creek, below the high water line (strand) of Philbrook reservoir. Comment
  JEPS121903  Gnaphalium palustre Lowell Ahart 2014-7-10 19626 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  UCD132408  Gnaphalium palustre A. A. Heller 1917-7-28 12827 Butte exact location unknown. 1280 Comment
  SEINET10839605  Goodyera oblongifolia Mary Susan Taylor 1978-9-9 Taylor 1920 Butte Along the Skyway in the village of Inskip. 1468 Comment
  CHSC44190  Grindelia camporum var. camporum Vernon Oswald 1988-7-7 3610 Butte Gray Lodge Waterfowl Management Area; near Rutherford Rd., 0.75 mi w of Pennington Rd. 21 Comment
  CHSC65447  Grindelia camporum var. camporum Vernon Oswald 1990-10-15 4468 Butte Arroyo Chico. East Ave just west of the Esplanade, Chico. Roadside. 54 Comment
  CHSC24503  Hackelia californica M. S. Taylor 1976-6-28 1167 Butte Ca. 4 mi se of Jonesville, ca. 2 ft n of Scotts John Creek Rd. 1828 Comment
  CHSC35080  Hackelia californica R. Schlising; D. Ikeda, R. Banchero 1980-6-26 3789 Butte 4.0 mi SE of Butte Meadows on Bull Hill Road. 1536 Comment
  UC480670  Hackelia californica H. F. Copeland 1930-7-20 1313 Butte Jonesville 1524 Comment
  UC897381  Helenium bigelovii A. A. Heller 1938-7-20 15284 Butte 7 mi e Chaparral (upper end of lake); Snag Lake 1524 Comment
  CAS-BOT-BC314754  Helianthella californica var. nevadensis H. F. Copeland 1920-8-1 192 Butte Jonesville 1219 Comment
  CHSC11823  Helianthella californica var. nevadensis E. B. Copeland 1931-6-22 695 Butte Jonesville, at 'the Summit'. 2150 Comment
  CHSC32601  Helianthella californica var. nevadensis J. D. Jokerst 1980-4-19 617 Butte Humbug Rd, 6.6 mi N of the Centerville Cemetary (Butte CR Canyon). Comment
  RSA0047072  Helianthella californica var. nevadensis L. P. Janeway 2006-6-25 8700 Butte Along a major dirt road 2.6 km south of Stirling City towards West Branch Feather River crossing. 1006 Comment
  RSA4454  Helianthella californica var. nevadensis E. B. Copeland 1931-6-22 695 Butte Jonesville; at 'the Summit' 2150 Comment
  CHSC66433  Heliotropium curassavicum Vernon H. Oswald; Lowell Ahart 1996-6-10 7748 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. Near a U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. On edge of the farm road bordering the slough on the E side of Little Grant, near the Riparian Sanctuary. 28 Comment
  CHSC100479  Heliotropium europaeum Lowell Ahart; John Dittes, Josephine Guardino 2008-11-8 15442 Butte On the bottom of Lindo Channel, about 100 yards west of the diversion structure, north of Hooker Oak, Upper Bidwell Park, Chico. 68 Comment
  JEPS115050  Heliotropium europaeum Lowell Ahart 2007-11-3 14575 Butte Below the high water line of Lake Oroville, about 1/2 mile east of the Power House below Kunckle Reservoir, about 3/4 mile north of the Lime Saddle Campground, about 5 1/4 miles (air) southeast of Paradise 257 Comment
  CAS-BOT-BC315000  Hemizonella minima Lowell Ahart 1989-5-29 6325 Butte East of Mooreville Ridge about 2 air miles north of the Lost Creek Dam south of the west branch of Pinkard Creek 1188 Comment
  UC1609221  Hemizonella minima Lowell Ahart 1993-7-29 7114 Butte about 2 1/2 mi ne Bald Mountain (about 6 1/2 air mi ne of Stirling City) 1584 Comment
  CHSC37075  Hemizonia congesta subsp. luzulifolia L. Ahart 1982-9-9 3768 Butte On sides of deep ditch, ca. 100 m n of check-in station, Graylodge Wildlife Refuge, ca. 12 mi sw of Gridley. 35 Comment
  UC186058  Hemizonia congesta subsp. luzulifolia A. A. Heller 1913-10-7 11147 Butte 8 mi n Oroville (Table Mountain Olive Ranch) 121 Comment
  CHSC41234  Hesperolinon disjunctum J. D. Jokerst 1985-5-24 2028 Butte In my back yard, Cherokee area, Campbell Flat, east of Table Mt. Comment
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Dec 22 2020
  UC2062461  Heteranthera limosa Barbara Ertter with Vern Oswald & Lowell Ahart 1998-10-22 16444 Butte Rice Experiment State NW of Biggs, drained field at NE corner of Hamilton & Riceton roads. Comment
  CHSC101829  Heterocodon rariflorum Lowell Ahart 2009-5-23 15761 Butte South of a small drainage, about 30 yards west of Guardians Trail, about 100 yards northeast of Pine Trail, Upper Bidwell Park, about 3/8 mile (air) southwest of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  UC131826  Heterocodon rariflorum Mrs. R. M. Austin Jul 1896 192 Butte Colby Comment
  UC398948  Heterocodon rariflorum E. B. Copeland 1929-7-16 398 Butte Jonesville 1550 Comment
  SEINET10460705  Heterocodon rariflorum Edwin B. Copel 1928-8-18 Copeland 945 Butte JONESVILLE, ALLUVIAL SANDS Comment
  SEINET10460720  Heterocodon rariflorum Taylor 1980-5-27 Taylor 2718 Butte North side of Bald Rock Road, about 1 miles east of Lake Madrone 671 Comment
  CHSC41867  Heterotheca grandiflora Lowell Ahart 1986-11-7 5422 Butte In a prune orchard, east of the Feather River, north of the Oroville Gridley Highway, about 3 miles east of Gridley. 28 Comment
  CHSC6159  Heterotheca grandiflora J. Wheeler 1968-2-15 281 Butte Southern Pacific Railroad embankment at Coal Canyon. 228 Comment
  CAS-BOT-BC312343  Hieracium albiflorum E. B. Copeland 1930-7-16 495 Butte Jonesville 1600 Comment
  CAS-BOT-BC312346  Hieracium albiflorum A. A. Heller 1917-7-26 12848 Butte Butte Meadows 1402 Comment
  JEPS94304  Hieracium albiflorum Lowell Ahart 1997-8-1 7779 Butte Near some small streamlets of Little Kimshew Creek, in snow Meadow, about 1/4 mile east of Table Mountain, about 8 air miles northeast of Stirling City. 1524 Comment
  UC202672  Hieracium albiflorum A. A. Heller 1917-7-26 12848 Butte Butte Meadows 1402 Comment
  SD8927  Hieracium albiflorum Mrs. R. M. Austin 1883-1 Butte Comment
  CHSC113392  Hoita macrostachya Lowell Ahart 2014-5-27 19532 Butte Bottom of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 1/2 miles east of Honcut, about 12 miles (air) southeast of Oroville. 41 Comment
  CHSC43670  Hoita macrostachya Vernon Oswald 1983-6-14 685 Butte Upper Bidwell Park, Chico, near Yahi Trail e of Brown's Hole. 207 Comment
  CHSC62107  Hoita orbicularis L. P. Janeway 1993-7-2 4425 Butte Plumas National Forest. Open serpentine area above Rd 22N84 0.45 mi west of Stony Creek and 1.45 mi west of Rd 23N28 (the road from Swanye Hill to Big Bar Mtn). 926 Comment
  JEPS114985  Hoita orbicularis Lowell Ahart 2008-6-13 14828 Butte On wet soil, bottom of Oregon Gulch, bottom of an old gold mined area, about 400 yards southwest of the cemetery, about 10 miles (air) northeast of Oroville 305 Comment
  SEINET7930197  Hoita orbicularis Lowell Ahart 1985-7-24 5150 Butte East of the dirt road to the Forbestown Res, about 2 1/2 miles north-east of Forbestown.; 0 869 Comment
  CHSC64260  Holcus lanatus S. C. Morey 1983-8-3 695 Butte Chico Meadows. On e side of Scout Rd., ca. 1 mi n of its jct with Humboldt Rd. at Butte Meadows. 1292 Comment
  CHSC66459  Holcus lanatus Vernon H. Oswald; Lowell Ahart 1996-6-10 7761 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. In a ditch along the farm road on the N side of Tract 7.2, Sanctuary I. 33 Comment
  UCD84907  Holcus lanatus L. Y. Leonard 1919-6-16 X 3097 Butte Chico. Comment
  CHSC12003  Holodiscus microphyllus var. glabrescens E. B. Copeland 1929-7-17 375 Butte Above Jonesville. On mountain top. 2000 Comment
  CHSC58888  Holozonia filipes Lowell Ahart 1992-7-23 6833 Butte On the bottom and sides of Oregon Gulch, north of the Thermalito Diversion Pool, Lake Oroville Recreation Area, about 1 1/4 miles north-west of Oroville Dam. 91 Comment
  CHSC6728  Hordeum arizonicum B. Anthony 1968-4-21 464 Butte Horshoe Lake, Bidwell Park, Chico. Comment
  UCD85412  Hordeum brachyantherum R. N. Raynor; H. A. Hannesson 1941-5-9 s.n. Butte 10 miles S of Oroville on Marysville Road. Comment
  JEPS117881  Hordeum murinum subsp. glaucum L. P. Janeway 2008-4-2 9248 Butte East edge of City of Chico Cascade Range Foothills (slope on north side of Humboldt Road 2.9 km northeast of Bruce Road) 167 Comment
  CHSC99016  Hordeum murinum subsp. leporinum Lowell Ahart 2008-5-21 14781 Butte Dry bare granite soil, below the high water line of Lake Oroville, on the north side of the South Fork of the Feather River, where Sucker Creek enters the South Fork of the Feather River, about 1/4 mile northwest of the Ponderosa Dam. 246 Comment
  CHSC2155  Hordeum vulgare H. Silberman; D. Isaac 1949-5-17 Butte Manzanita Ave., 4 mi. E. of Chico. 60 Comment
  CHSC111977  Horkelia californica var. elata Lowell Ahart 2012-6-2 18137 Butte Along a small stream, west of a poor dirt road, about 100 yards north of Truex Road, west of the intersection of Truex Road and Trevor Road, about 1/8 mile northwest of the Wesst Branch Bridge across Lake Oroville. 286 Comment
  CAS-BOT-BC536587  Horkelia californica var. elata John Thomas Howell 1975-7-21 51334 Butte Sierra Nevada. North Branch Feather River 304 Comment
  RSA451654  Horkelia fusca subsp. parviflora H. F. Copeland 1928-8-20 458 Butte Jonesville. 1524 Comment
  JEPS83780  Horkelia fusca subsp. tenella V. Oswald and L. Ahart 1988-7-16 3614 Butte ca 6 air mi se Jonesville; Snow Mt. region, Red Fir Forest 1996 Comment
  UCD113497  Horkelia fusca var. tenella E. B. Copeland 1929-7-25 371 Butte Jonesville. 1550 Comment
  RSA4664  Horkelia tridentata E. B. Copeland 1929-7-23 370 Butte Jonesville. 1550 Comment
  RSA594174  Horkelia tridentata S. O. Mattoon 1970-6-30 43 Butte Southern Cascade Mtns: Pnderosa Way Forest road at Mud Creek, 5 air miles E of Cohasset. 671 Comment
  JEPS124020  Horkelia tridentata var. tridentata Lowell Ahart 2015-6-16 20239 Butte About 4 miles (by road) northwest of Fall River Bridge, about 5 1/2 miles (air) northwest of Camp 18, about 9 miles (air) northeast of Feather Falls. Comment
  SEINET3836429 Image available Hosackia argophylla var. fremontii A. A. Heller 1940-6-5 15699 Butte Feather River, between bridge and mouth of the West Branch of North Fork Comment
  CHSC45282  Hosackia crassifolia var. crassifolia Vernon Oswald 1987-6-23 3014 Butte High Lakes Rd. 2.1 mi (odometer) n of Philbrook Rd. 1828 Comment
  SEINET5327434  Hosackia incana R. McKee, H. L. Westover 1918-6-5 s.n. Butte Paradise Comment
  CHSC96935  Hydrocotyle umbellata Lowell Ahart 2007-7-11 14285 Butte About 100 yards west of the high gravel road (at turn, before washout), about 1/2 mile west of Pacific Heights Road, Oroville Wildlife Area, about 5 miles (air) southwest of Oroville. 35 Comment
  CAS-BOT-BC400823  Hypericum anagalloides Lowell Ahart 1974-8-14 s.n. Butte Along North Honcut Creek, Peter Ahart Ranch, Honcut 45 Comment
  CAS-BOT-BC400833  Hypericum anagalloides E. B. Copeland 1929-7-16 381 Butte Jonesville 1550 Comment
  CHSC13712  Hypericum anagalloides M. S. Taylor 1974-9-14 321 Butte Abundant ca. 1/2 mi n of Bidwell Park Rd, opposite Alligator Hole, on w edge of burn, Upper Bidwell Park, Chico. Comment
  UCD169859  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
  CAS-BOT-BC400826  Hypericum anagalloides Lowell Ahart 1979-6-9 s.n. Butte 2 mi se of Paradise. Along the edge of Kunkle Creek 500 Comment
  CHSC46359  Hypericum concinnum Lowell Ahart 1989-5-23 6231 Butte Along the edge of a new subdivision road, 1/4 mile east of Dunstone Drive, about 1/2 mile north of Bangor Park Road, west of Bangor. 76 Comment
  CAS-BOT-BC410222  Hypericum concinnum Clarence R. Quick 1964-7-9 64 -55 Butte north of Jarbo Gap Comment
  SD42246  Hypericum concinnum Carl Wolf 1941-7-23 4315 Butte Northern Sierra Nevada, 6.6 mi W. of De Sabla on Road to Forest Ranch 762 Comment
  CHSC6057  Hypericum patulum var. henryi M. MacArthur 1968-6-17 182 Butte SE wall of Life Sciences bld., Chico State College campus. 60 Comment
  CAS-BOT-BC401217  Hypericum perforatum John Thomas Howell 1962-6-16 37580 Butte Pentz road 2 mi. s. of Magalia 609 Comment
  SEINET10473837  Hypochaeris glabra Mary Susan Taylor 1981-5-19 Taylor 3809 Butte T22N R5E sw sec 23. Berry Creek quad. Both sides of 22N31, on Chibo Ridge ca. 2 mi NW of its jct with French Creek, ca. 4 air mi S of Coyote Gap, ca. 17 air mi NE of Oro- ville. Yellow Pine Forest; gravelly decomposed granite: 2800 ft. 853 Comment
  CDA2760  Ipheion uniflorum R. Bell-Booth 1962-3-28 Butte 656 E. 5th Street, Chico. 0 Comment
  UCD118208  Ipomopsis aggregata E. B. Copeland 1929-7-24 394 Butte Jonesville. 1550 Comment
  CAS-BOT-BC133557  Iris hartwegii L. W. Lenz; E. K. Balls 1957-5-23 22528 Butte 3 mi. SE. from turn-off, Hwy. 32 to De Sabla 670 Comment
  POM109028  Iris hartwegii C. C. Bruce 1898-05 2408 Butte Doe mill Comment
  SEINET4170702  Iris hartwegii A. A. Heller 1939-3-23 15357 Butte Paradise , in the Arid Transition Zone. Comment
  UCD138745  Iris hartwegii N. Kvasnik 1980-4-20 12 Butte Butte Creek Canyon, Covered Bridge. East side of creek, south of bridge. Comment
  UCD138747  Iris hartwegii R. H. Ramsey 1961-5-13 53 Butte 1 mile north of Berry Creek on Oroville - Quicy Road. Comment
  CHSC31179  Iris hartwegii subsp. hartwegii M. S. Taylor 1980-5-4 1982 Butte Millsap Bar Campground, ca. 9 mi ne of the jct of Millsap Bar Road with Brush Creek Rd, ca. 26 mi ne of Oroville. 1005 Comment
  CHSC88058  Iris hartwegii subsp. hartwegii R. D. Fischer 2004-5-30 184 Butte Northern Sierra Nevada, 4-5 airmiles n. of Paradise, and w. of upper Paradise Pines. Turn w. off Skyway Road on Nimshew Road, ca. 2 miles down this rd. at a private residence. UTM: 10618179E 4410379N. 751 Comment
  UCSB63624  Iris macrosiphon Chambers, Beth 1986-4-18 Butte N on Cohasset Rd; 13.8 mi from Eaton Rd; Chico 853 Comment
  UCD138811  Iris tenuissima P. Laherty 1976-5-4 7 Butte ca. 4 miles west of junction of Pondersoa Way and Hwy 32. ca. 22 miles northeast of Chico. Comment
  CHSC46179  Isoetes howellii Lowell Ahart 1975-5-11 754 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  SEINET11718752  Isoetes nuttallii Unknown 1985-1 4945 Butte E branch of Potter Ravine, ca 2.25 mi N of Oroville Dam 350 Comment
  CHSC61513  Isolepis setacea Lowell Ahart 1993-6-20 6975 Butte Along seep edges, about 1/2 mile south of Quartz Hill. 1219 Comment
  CHSC83671  Isolepis setacea John Dittes 2002-7-9 2 -13 Butte Northern High Sierra Nevada; Plumas National Forest, between Hartman Bar Ridge and Mountain Spring House Ridge, on slope above confluence of South Branch of the Middle Fork Feather River and Pinchard Creek, ca. 0.2 air miles south-southeast of Whisky Hill. 1280 Comment
  CHSC93635  Juglans californica var. hindsii Paul Kirk 2001-10-19 12 Butte City of Chico, private property on SE corner of Henshaw and Nord. Closest to the street corner. 51 Comment
  CHSC42950  Juncus acuminatus Lowell Ahart 1987-7-17 5821 Butte Along the North Fork of the Feather River, near the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC49602  Juncus acuminatus Vernon Oswald 1985-5-20 1774 Butte Along Thermalito Afterbay near Hwy 162 ca. 1 mi e of Hwy 99. 35 Comment
  CHSC116318  Juncus articulatus subsp. articulatus Lowell Ahart 2015-11-18 20666 Butte Marsh like area, 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
  UCD80387  Juncus balticus subsp. ater CNPS SN Foothill Team 2005-5-25 SNNR 0266 a Butte City of Chico, Upper Bidwell Park, .75 m west of Big Chico Creek. 209 Comment
  SEINET10872253  Juncus bufonius Mary Susan Taylor 1982-4-28 Taylor 4366 Butte T17N R1E sw/se sec 11. Pennington quad. Graylodge Wildlife Refuge, near parking lot 1, ca. 1/2 mi ne of HQ, ca. 12 mi sw of Gridley. 65 ft. 20 Comment
  CHSC54363  Juncus bufonius var. bufonius M. Bailey 1991-4-19 567 Butte Butte College campus. Within fenced area around Wallis Pond, along drainage to the w of the pond and e of Well #3. 85 Comment
  JEPS113880  Juncus bufonius var. bufonius Lowell Ahart 2007-6-12 14061 Butte Along swales, west of a high ridge on Big Bald Rock, about 14 miles (air) northeast of Oroville 972 Comment
  JEPS114389  Juncus bufonius var. bufonius Lowell Ahart 2008-5-30 14795 Butte Dry to damp granite soil, 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 305 Comment
  POM176295  Juncus bufonius var. bufonius E. B. Copeland 1903-5-30 2702 Butte Chico. Comment
  CHSC103724  Juncus bufonius var. congestus Lowell Ahart 2010-5-14 16666 Butte Near south park fence, Disc Golf Area, about 200 yards west of the entrance to the Disc Golf Area, west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 350 Comment
  CHSC112937  Juncus bufonius var. congestus B. Castro 2012-5-29 1925 Butte Sacramento Valley. Between hwy 99 and the Thermalito Afterbay levee, ca 0.6 mi S of jcn of Hwys 99 and 162W, ca 0.4 mi N of Hamilton Rd. 34 Comment
  CHSC71104  Juncus bufonius var. congestus Lowell Ahart 1998-5-2 7957 Butte Graded north side of Evens Reimer Road, about 1/4 mile east of Pennington Road, about 5 miles (air) southwest of Gridley. 21 Comment
  CHSC27059  Juncus capitatus Lowell Ahart 1978-5-1 1679 Butte Peter Ahart Ranch, Honcut. 50 Comment
  JEPS118087  Juncus covillei Lowell Ahart 2011-8-19 17640 Butte On the north side ofa good forest road and in the west gutter of a secondary road, about 1/2 mile north of the Lost Creek Reservoir Dam, about 4-1/2 miles (air) north of Clipper Mills 1266 Comment
  SEINET10971397  Juncus cyperoides Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4692 Butte About 0.5 mi SW of the jct of Black Bart Rd and Forbestown Rd, ca. 14 mi E of Oroville; Yellow Pine Forest; 650 m. 650 Comment
  UCD141429  Juncus cyperoides L. Ahart 1981-7-24 2999 Butte east edge of Black Bart Road about 1/2 mile southwest of the intersection of Black Bart Road and Oroville Forbestown Highway, west of Forbestown. 2000 Comment
  CHSC116305  Juncus diffusissimus Lowell Ahart 2015-11-18 20665 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
  CHSC30437  Juncus dubius L. Ahart 1980-7-29 2512 Butte Gutter along Lower Forbestown Rd., (Ponderosa Rd.) ca. 1/4 mi N of the intersection with Robinson Mill Rd., W of Forbestown. 750 Comment
  SEINET10472479  Juncus effusus var. pacificus Lowell Ahart, Peter Ahart 1983-6-21 Ahart 4099 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
  CHSC78335  Juncus ensifolius Lowell Ahart 2000-7-11 8568 Butte On the sides 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
  CHSC99488  Juncus ensifolius Lowell Ahart 2008-7-23 15142 Butte North side of the South Fork of the Feather River, about 10 yards west 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
  JEPS120032  Juncus exiguus Lowell Ahart 2012-6-21 18211 Butte On the south side of Big Chico Creek, about 300 yards east of the dam at Sycamore Pool, Lower Bidwell Park, Chico. Comment
  CHSC96318  Juncus howellii L. P. Janeway 2006-8-12 8844 Butte Northern High Sierra Nevada. Meadow at head of northwestern branch of Keyser Creek, below sharp bend in Concow Road, 0.3 km east of the summit of Bald Mountain. 1695 Comment
  JEPS45835  Juncus howellii Duncan Dunning 1921-7-29 Butte Butte Meadows Comment
  CHSC113938  Juncus laccatus Lowell Ahart 2014-8-13 19701 Butte On the bottom of a small drainage, south of the intersection of Humbug Summit Road and Philbrook Road, about 2 miles (air) northwest of Philbrook Reservoir. 1597 Comment
  UC1586561  Juncus leiospermus var. ahartii Lowell Ahart 1991-5-2 6647 Butte about 2 1/4 mi n and 1/2 mi e of Honcut (about 12 mi s of Oroville, Peter Ahart Ranch); Peter Ahart Ranch 39 Comment
  CAS-BOT-BC110142  Juncus leiospermus var. leiospermus Lowell Ahart 1978-5-2 s.n. Butte Sierra Nevada. Table Mountain, ca. 7 miles north of Oroville. 400 Comment
  CHSC103713  Juncus leiospermus var. leiospermus Lowell Ahart 2010-5-22 16726 Butte About 100 yards east of Cherokee Road, about 200 yards northeast of parking area, North Table Mountain, about 4 1/2 miles (air) northeast of Oroville. 385 Comment
  CHSC111365  Juncus leiospermus var. leiospermus Lowell Ahart 2014-5-4 17984 Butte About 100 feet southwest of the lone oak tree, on the south rim of Beatson Hollow, about 1/2 mile northwest of the iron gate on the north side of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 348 Comment
  CHSC113242  Juncus leiospermus var. leiospermus Lowell Ahart 2014-4-20 19381 Butte About 1/4 mile northwest of parking area on the west side of Cherokee Road, about 7 miles (air) north of Oroville. 392 Comment
  RSA712864  Juncus leiospermus var. leiospermus L. Ahart 2006-5-8 12604 Butte About 1 1/2 miles west of the parking area, cow chute, and Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 340 Comment
  UC1446143  Juncus leiospermus var. leiospermus Lowell Ahart 1979-5-7 1857 Butte 2.5 mi se Paradise (0.5 mi n of Kunkle Reservoir, ca 0.25 mi e of the Pentz-Magalia Hwy) 472 Comment
  SEINET10472481  Juncus mertensianus subsp. gracilis Mary Susan Taylor 1978-7-18 Taylor 1719 Butte On N side of Butte Creek, ca. 1/8 mi W of Road Island Junction, at junction of Butte Creek and Old Humboldt Road, ca. 1 mi W of Cherry Hill Campground; Yellow Pine Forest. 1524 Comment
  SEINET11787693  Juncus nevadensis R. A. Schlising, Jokerst, J. D. 1982-1 1653 Butte easternmost pond on bench along S edge of Coon Hollow 1707 Comment
  JEPS114977  Juncus occidentalis Lowell Ahart 2008-6-13 14816 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
  HSC100818  Juncus orthophyllus Lowell Ahart 2011-8-19 17634 Butte On the N edge of a good forest road, W edge of Know-northing Creek, ~150 yd. N of Lumpkin Ridge Rd., 5 (air) mi. NE of Feather Falls. 1225 Comment
  CHSC38922  Juncus oxymeris Vernon Oswald 1983-5-25 556 Butte Upper Bidwell Park, Chico, 400 ft s of Upper Park Rd. and 1200 ft e of Salmon Hole Parking Area. 182 Comment
  CHSC41353  Juncus oxymeris R. A. Schlising 1983-5-15 4408 Butte Richvale Vernal Pools; 0.25 mile S of junction Hwy 162 to Oroville with Highway 99; along the latter and across from Thermalito Afterbay. In pools in SE portion of area. Comment
  CHSC44524  Juncus oxymeris Lowell Ahart 1988-6-28 6083 Butte Along North Honcut Creek, Joie Osgood Ranch, about 3/4 mile north and 2 1/2 miles east of Honcut. 39 Comment
  JEPS113768  Juncus patens Lowell Ahart 2007-7-15 14305 Butte Along the east side of Encina Grande Road (Bloomer Hill Road), about 20 yards southeast of the home, about 1/4 miles (air) southwest of Bloomer Hill 808 Comment
  UCD141879  Juncus phaeocephalus var. paniculatus J. W. Jones 1922-7-1 s.n. Butte Rice Station, Biggs. Comment
  CHSC96884  Juncus tenuis Lowell Ahart 2007-6-12 14081 Butte On the east side of Rockefeller Road, at the intersection of Bald Rock Road and Rockefeller Road, about 13 miles (air) northeast of Oroville. 1011 Comment
  RSA726660  Juncus tenuis L. Ahart 2007-6-12 14081 Butte Rockefeller Road, at the intersection of Bald Rock Road and Rockefeller Road, about 13 miles (air) northeast of Oroville. 1012 Comment
  UC1609503  Juncus tenuis Lowell Ahart 1993-7-23 7099 Butte ca. 6 (air) mi. n.e. Feather Falls (ca. 100 yds. w. of bridge across Fall River) 1036 Comment
  RSA726661  Juncus triformis L. Ahart 2007-6-12 14075 Butte 50 yards south of Bean Creek Road, about 1/4 mile (air) southeast of Little Bald Rock, about 15 miles (air) northeast of Oroville. 975 Comment
  CHSC78337  Juncus trilocularis Lowell Ahart 2000-6-27 8512 Butte Big Bald Rock, about 3 miles (air) east of Madrone Lake, about 12 miles (air) northeast of Oroville. 993 Comment
  JEPS113765  Juncus usitatus Lowell Ahart 2007-7-27 14397 Butte On the south strand of 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
  CHSC44720  Keckiella breviflora var. glabrisepala R. Banchero 1980-6-2 176 Butte Along Hwy 32 ca 3.1 mi SW of the town of Forest Ranch, 5.7 mi SW of its jct with Forest Ranch Rd. 609 Comment
  CHSC37067  Keckiella lemmonii L. Ahart 1982-9-29 3841 Butte Along Pinkard Creek, ca. 1.5 mi n of Lost Creek Reservoir Dam, ca. 3.5 mi ne of Strawberry Valley. 1200 Comment
  SEINET12765113  Keckiella lemmonii Lowell Ahart 1997-8-1 7795 Butte On the west side of Little Kimshew Creek, about 1/4 mile east of Table mountain, about 8 miles (air) northeast of Stirling City.; 0 1372 Comment
  CHSC26685  Kelloggia galioides M. S. Taylor; R. A. Schlising, M. Hayes 1977-8-17 1484 Butte At Butte-Tehama County line, ca. 100 ft W of Old Humboldt Rd, on Butte side. 2133 Comment
  SEINET13711424  Kickxia elatine Lowell William Ahart, Lowell William Ahart 1999-1 8132 Butte 12 Air Mi SW of Chich, 2 Mi SE Ordbend, Sacramento River Comment
  SEINET10782600  Kickxia elatine Renate K. Stern 1972-9-19 Stern 3779 Butte Dry, open area, vic. E bank of the Sacramento River, Llano Seco Rancho, ca. 10 mi SW of Chico. Comment
  CDA2213  Koeleria gerardi Sterling O. Mattoon 1971-4-27 Butte 6.9 miles east of Chico. 0 Comment
  CHSC6160  Koeleria phleoides E. Parreno 1968-4-15 55 Butte NE of Municipal Golf Course in top on slope of ridge area in Upper Bidwell Park, Chico. Comment
  UC1594708  Koeleria phleoides Lowell Ahart 1992-5-9 6754 Butte about 1 1/2 mi w Oroville Dam (on the n side of the Thermalito Diversion Pool, Lake Oroville Recreation Area); Lake Oroville Recreation Area, Thermalito Diversion Pool 76 Comment
  CAS-BOT-BC340329  Kyhosia bolanderi E. B. Copeland 1930-8-4 s.n. Butte Jonesville 1500 Comment
  CAS-BOT-BC274276  Lachnagrostis filiformis Earle T. Gammon 1959-7-6 s.n. Butte Rice Exp. Station, Biggs Comment
  JEPS95527  Lactuca canadensis Lowell Ahart 1994-10-23 7568 Butte 4 mi W and 0.5 mi N of Stirling City (3 mi N of De Sabla reservoir) 853 Comment
  CHSC102737  Lactuca scariola var. integrata Lowell Ahart 2009-8-3 16251 Butte On the east side of Ten Mile House Road, just northeast of Guardians Trail, Upper Bidwell Park, about 1/4 mile west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  JEPS115631  Lactuca serriola Lowell Ahart 2009-8-9 16269 Butte Rice field, Peter Ahart Ranch, about 2 1/2 miles north and 3/4 mile east of Honcut, about 12 miles (air) south of Oroville 31 Comment
  UC828864  Lactuca serriola A. A. Heller 1916-9-9 12654 Butte near Durham Comment
  CDA7502  Lactuca serriola T. C. Fuller 1959-10-2 Butte Rice Experiment Station, ca. 3 miles north of Biggs. 0 Comment
  POM181475  Lactuca serriola H. F. Copeland 1923-1 864 Butte Nelson. Comment
  CHSC65326  Laennecia coulteri Lowell Ahart 1995-10-4 7678 Butte Rice field, Peter Ahart Ranch, about 2 miles north and 1/4 mile easata of Honcut, about 12 miles south of Oroville. 36 Comment
  SEINET5709525 Image available Laennecia coulteri Grady L. Webster, G. Ledyard Stebbins 1967-1 7532 Butte Rancho Llano Seco, near end of west arm of Eddy Lake.; Eddy Lake Comment
  CHSC108176  Lagophylla glandulosa L. P. Janeway 2011-8-17 10658 Butte Northern High Sierra Nevada. Plumas National Forest; east slope of Bloomer Hill, 850 m east-southeast of the top. Small flat at western end of the rock-garden-like opening in Ponderosa pine dominated mixed conifer forest. 721 Comment
  CHSC25273  Lagophylla glandulosa M. S. Taylor 1977-6-27 1396 Butte Butte College campus, ca. 15 mi s of Chico. 30 Comment
  JEPS115875  Lagophylla glandulosa Lowell Ahart 2009-7-9 16002 Butte On the east side and in the center 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
  CHSC43853  Lamium amplexicaule L. P. Janeway 1988-2-21 2589 Butte Low in cyn of Little Chico Cr ca 2 mi S of Ten Mile House. 243 Comment
  CHSC749  Lamium amplexicaule R. Carter 1964-3-17 48 Butte 7 mi E of Oroville, 250 yds. up Wakefield Dr. off Feathervale on S side rd. 121 Comment
  JEPS107342  Lamium amplexicaule Lowell Ahart 2005-4-2 11691 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
  CHSC90996  Lasthenia fremontii Lowell Ahart 2005-5-11 11806 Butte Margins of a small vernal pool, south of a small stream, open pasture field, about 1 mile south of Beatson Hollow, about 1 1/2 miles southwest of the poor dirt road off of Cherokee Road, south part of North Table Mountain, about 7 miles (air) north of Oroville. 280 Comment
  UCD80079  Lasthenia fremontii CNPS SN Foothill Team 2005-5-4 SNFN 0200 c Butte City of Chico, Bidwell Ranch, about 1.33 miles NW of the end of Wildwood road. 88 Comment
  HSC67550  Lasthenia microglossa J. P. Smith 1973-3-22 5919 Butte 2.1 mi. E of junction with Hwy. 99 and the road to Paradise 122 Comment
  CHSC77987  Lathyrus angulatus Lowell Ahart 2000-5-13 8351 Butte Near the margin of the Thermalito Afterbay, 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
  JEPS127072  Lathyrus angulatus Lowell Ahart 2016-5-30 20896 Butte Peter Ahart Ranch, about 2 1/2 miles north and 1/4 mile east of Honcut, about 12 miles (air) south of Oroville. Comment
  CAS-BOT-BC213345  Lathyrus jepsonii subsp. californicus Lowell Ahart 1987-4-30 5488 Butte On the banks of North Honcut Creek, about 2 1/2 miles north and 3 miles east of Honcut, about 12 miles southeast of Oroville 67 Comment
  CDA42904  Lathyrus latifolius L. Ahart 2012-6-14 18196 Butte South of the paved park road, Annie's Glen, Lower Bidwell Park, Chico. Comment
  RSA700396  Lathyrus latifolius H. Gray 2003-6-3 s.n. Butte Millsap Bar Road. Comment
  SEINET12161676  Lathyrus nevadensis Unknown 1977-1 55 Butte ca 10yd to E sdie of Vilas Rd, ca .4miNE of jct of Cohasset Rd and Vilas rd, Cohasset. see comments 945 Comment
  SEINET12164065  Lathyrus nevadensis Unknown 1980-1 19 Butte ca .6miN of Lumpkin Rd, ca .2miW of Nutmeg Crk tributary, ca 2yds E of a dirt rd see comments 732 Comment
  CAS-BOT-BC213292  Lathyrus sulphureus A. A. Heller 1915-4-20 11846 Butte 3 miles above Centerville in the Sierra foothills. Comment
  UC179640  Layia fremontii A. A. Heller 1914-3-28 11235 Butte 8 mi n Oroville Comment
  CAS-BOT-BC321759  Layia fremontii Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-9 3 Butte At intersections of Hwys 149 & 99 just N of Oroville, 50' E of offramp 54 Comment
  UCSB63596  Layia fremontii Wilson, Simon 1995-4-11 Butte Ca. 5 mi. n of Chico, 1 mi. toward Richardson Springs from junction of Cohasset Rd. and Richardson Springs Rd.; Richardson Springs USGS Quadrangle T23N, R1E, NW 1/4 sect. 23 115 Comment
  CHSC38826  Leersia oryzoides Vernon Oswald 1983-9-24 1046 Butte Upper Bidwell Park, Chico, in Lindo Channel just upstream from the flood-control gates. 79 Comment
  CHSC42915  Leersia oryzoides Lowell Ahart 1987-7-3 5777 Butte Along the North Fork of the Feather River, neaar the Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  CHSC59579  Leersia oryzoides Lowell Ahart 1992-9-9 6919 Butte About 1/2 mile south-east of Kunkle Reservoir. 243 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
  CDA42937  Lemna minuta L. Ahart 2012-10-2 18491 Butte On the south side of Big Chico Creek, about 50 yards east of Table 5, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  CHSC66153  Leontodon saxatilis subsp. longirostris Vernon H. Oswald 1996-5-9 7544 Butte Sacramento Valley. Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife parcel between 7 Mile Lane and the Sacramento River. In the S paddock of Tract 7, Sanctuary II. 32 Comment
  CHSC115325  Lepidium campestre Lowell Ahart 2015-4-13 20039 Butte Below the high water line of Lake Oroville, Vinton Gulch, about 10 miles (air) north of Oroville. 307 Comment
  SEINET10448476  Lepidium dictyotum Mary Susan Taylor 1982-4-28 Taylor 4351 Butte T17N R1E se/s sec 13. Pennington quad. Graylodge Waterfowl Refuge, n side of Rutherford Rd, 1/8 mi w of Pennington Rd, ca. 12 mi sw of Gridley. 70 ft. 21 Comment
  CHSC46254  Lepidium dictyotum var. dictyotum Vernon Oswald 1989-4-20 3744 Butte Gray Lodge Wildlife Area, s of Rutherford Rd at Parking Area 5. 19 Comment
  CHSC34526  Lepidium nitidum R. E. Preston 1982-2-4 159 Butte Top of cliffs, s rim of Butte Creek Canyon above Honeyrun Covered Bridge, ca. 7.5 mi e of Chico. 289 Comment
  UCD115775  Lepidium nitidum L. Ahart 1973-2-21 153 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CAS-BOT-BC12800  Lepidium perfoliatum Lowell Ahart 1981-4-6 2742 Butte A little west of the Gray Lodge Headuarters, ca. 8 miles southwest of Gridley. 35 Comment
  SEINET10448292  Lepidium perfoliatum Mary Susan Taylor 1982-4-28 Taylor 4375 Butte T17N R1E sc border 14/23. Pennington quad. Graylodge Wildlife Refuge, e side of rd, ca. 1/4 mi se of HQ, ca. 12 mi sw of Gridley. 65 ft. 20 Comment
  CAS-BOT-BC12847  Lepidium pinnatifidum H. A. George; V. Simpson; E. Littrel 1971-6-14 s.n. Butte Gray Lodge Wildlife Management Area, 7 miles southwest of Gridley. 27 Comment
  CHSC35012  Lepidium strictum R. E. Preston 1982-3-6 185 Butte Ca. 100 yds n of Horseshoe Lake, Upper Bidwell Park, Chico. 106 Comment
  CHSC35023  Lepidium strictum R. E. Preston 1982-3-27 204 Butte At roadside; W. First Ave between Warner and Cedar Sts, Chico. Comment
  SEINET3015366  Leptochloa dubia L. Ahart 1997-9-6 7894 Butte On the W side of Hwy 70, just N of Rich Gulch Rd, about 1 1/2 mi N of the bridge across the West Branch of Lake Oroville. 396 Comment
  UCR148775  Leptochloa dubia Lowell Ahart 2000-11-4 8714 Butte W side of Hwy 70, about 100 yd N of Rich Gulch Road, 1 mi N of the West Branch Bridge across Lake Oroville, and 5 air mi SE of Paradise 335 Comment
  CHSC78225  Leptochloa fusca subsp. fascicularis Lowell 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. 36 Comment
  CHSC83005  Leptochloa fusca subsp. fascicularis Lowell Ahart 2002-9-7 9929 Butte On the east side of Cherokee Road, north of the Thermalito Diversion Canal, on the west side of the water purification pond, about 1 mile north of Oroville. 130 Comment
  CAS-BOT-BC226525  Leptosiphon acicularis Lowell Ahart 1979-4-22 s.n. Butte Peter Ahart Ranch. Honcut 50 Comment
  CHSC50677  Leptosiphon acicularis Lowell Ahart 1990-4-7 6432 Butte In a pasture field, about 3 miles north and 1 1/2 miles east of Honcut, about 10 miles south of Oroville. 45 Comment
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Jul 19 2018
  CHSC54307  Leptosiphon bolanderi Vernon H. Oswald; Lowell Ahart 1991-6-5 4644 Butte Dirt road to Minnie-Ha-Ha Mine located on Big Chico Creek, on the west side of Hwy 32 ca. 1.5 miles (air) northwest of Platte Mtn Lookout, between Forest Ranch and Lomo. 701 Comment
  RSA20873  Leptosiphon bolanderi C. B. Wolf 1937-3-29 8334 Butte Sierra Nevada foothills, 7.8 miles below Paradise on Chico Road. 152 Comment
  CHSC41368  Leptosiphon filipes B. Castro 1982-4-21 26 Butte Vernal pool area, 0.3 mi w of jct with Hwy 99 on Broyles Rd, ca 10 mi nw of Chico. 60 Comment
  CHSC44320  Leptosiphon parviflorus Lowell Ahart 1979-4-16 1823 Butte Near North Honcut Creek, about 300 feet north of Avocado Avenue, about 3 miles north-west of Bangor. 91 Comment
  RSA181940  Lessingia nana Willard Spence 1962-7-24 729 Butte Route 99E, corner of Broyles Road, north of Chico Comment
  CAS-BOT-BC341781  Lessingia nemaclada Lowell Ahart 1980-9-10 2643 Butte 7 miles east of Milsap Bar 1200 Comment
  CHSC41865  Lessingia nemaclada Lowell Ahart 1986-11-8 5432 Butte Along the edge of th dirt road, about 1 1/2 miles north of French Creek, along Swayne Hill, about 3 air miles north-west of the Brush Creek Work Center, about 25 miles north-east of Oroville. 640 Comment
  UC725608  Lessingia nemaclada A. A. Heller 1940-9-28 15841 Butte lower end of Honey Run grade at Paradise Comment
  CAS-BOT-BC341787  Lessingia nemaclada John Thomas Howell 1951-8-19 28163 Butte Above Arch Rock Tunnel, Feather River 457 Comment
  SEINET10474782  Lessingia nemaclada Mary Susan Taylor 1975-9-19 Taylor 917 Butte Ca. 0.5 mi N of Magalia, ca. 50 ft E of Skyway; serpentine area surrounded by Yellow Pine Forest. 610 Comment
  CAS-BOT-BC342059  Lessingia virgata Willard Spence 1960-9-7 625 Butte 7 miles south of Oroville, alternate Route 40 Comment
  UCD169079  Lessingia virgata Ramona Robison 2013-4-15 12 Butte Clay Pit State Vehicular Recreation Area, located two miles west of the town of Oroville. 41 Comment
  UCD159567  Leucanthemum maximum D. S. Park 2011-6-27 304 Butte East shore of Thermalito Afterbay. Growing on roadsides. Disturbed. 1999 Comment
  CHSC43878  Leucothoe davisiae L. P. Janeway 1987-6-13 2218 Butte Along Concow Rd, just SW of jct with road to Five Corners and Stirling City. 1188 Comment
  CHSC111128  Ligustrum japonicum Lowell Ahart 2012-6-21 18199 Butte Lawn, on the south side of the paved park road, west of the entrance from Woodland Avenue, Lower Bidwell Park, Chico. 62 Comment
  RSA776054  Lilaea scilloides P. Reisentz 1979-5-11 s.n. Butte 0.7 mile W on Lunt Road from Highway 70, north of Oroville Comment
  CAS-BOT-BC451601  Lilaea scilloides Lowell Ahart 1989-5-23 6240 Butte North of the new subdivision road, 1/2 mile east of Dunstone Drive, about 1/2 mile north of Bangor Park Road, west of Bangor 76 Comment
  CHSC43073  Lilium humboldtii R. A. Schlising; Diane Ikeda 1987-6-12 4512 Butte S of Cohasset, along Cohasset Rd. ... Field redacted by CHSC, contact the data manager for more information 457 Comment
  CHSC43047  Lilium pardalinum subsp. pardalinum L. P. Janeway 1987-6-27 2334 Butte Along dirt rd 0.6 mi east of Ramsey Bar; just north of 'The Big Hill. 1386 Comment
  CHSC46236  Lilium pardalinum subsp. pardalinum Pauleen Broyles 1987-7-5 1073 Butte Ca 7 km n of Inskip, ca 0.4 km s of Bull Hill Rd., along Coon Creek. 1500 Comment
  CHSC43045  Lilium washingtonianum subsp. washingtonianum L. P. Janeway 1987-6-20 2264 Butte SE-facing road cutbank above Rock Cr, 0.5 mi from Lumpkin Ridge Rd on rd to Mooreville Ridge. 1219 Comment
  CHSC41229  Limnanthes alba J. D. Jokerst 1985-3-30 2187 Butte Roadside ditch. North edge of Wookey Rd, ca 1/2 mile east of Meridian Rd. 91 Comment
  UCR188703  Limnanthes alba Ken Osborne 2007-5-13 s.n. Butte Sierra Nevada Foothills, along Ponderosa Way at Mud Creek, c. 1.5 mi. SE of Cohasset 701 Comment
  SEINET10495211  Limnanthes alba Mary Susan Taylor 1976-4-27 Taylor 1094 Butte Abundant in Yellow Pine Forest, on N or S side of Ponderosa Way, ca. 1-4 mi E of junction of Villas Rd and Cohasset Hwy, ca. 23 mi NE of Chico. 610 Comment
  UC971834  Limnanthes alba subsp. alba Charles T. Mason Jr. 1949-4-23 1252 Butte 7 mi s Oroville (in ditch along e side of State Hwy 24) Comment
  CHSC2388  Limnanthes alba subsp. versicolor R. Carter 1965-4-12 178 Butte Found 7.5 mi. E of Oroville, 20 yds. from gate at end of Feathervale on N side of road. 274 Comment
  JEPS104300  Limnanthes alba subsp. versicolor Lowell Ahart 2003-4-15 10097 Butte Slopes of Beatson Hollow, sw of drainage entering Beatson Hollow, ca 1 1/4 mi nw of the iron gate and fence, nw of Cherokee Rd, North Table Mountain, ca 7 mi (air) n of Oroville. 284 Comment
  HSC93611  Limnanthes alba subsp. versicolor James D. Jokerst, R. S. Schlising 1982-5-19 1576 Butte NE of Camp 18 on Lumpkin Ridge Rd. 1280 Comment
  SEINET10870241  Limnanthes douglasii var. rosea Mary Susan Taylor 1976-3-23 Taylor 1030 Butte Abundant in vernal pool, SW corner of junction of Broyles Road and Hwy 99, ca. 11 mi N of Chico. 61 Comment
  CHSC55506  Limnanthes floccosa subsp. californica L. P. Janeway; Pat Kelly 1991-3-31 3867 Butte Between Hwy 32 and Dead Horse Slough, and from 600 to 1200 ft west of Bruce Road. 74 Comment
  CHSC32591  Limnanthes floccosa subsp. floccosa J. D. Jokerst 1981-3-21 1257 Butte Initial slopes delineating the beginning of the foothills, ca. 0.5 mi N of Horseshoe Lake. Comment
  CHSC53968  Limnanthes floccosa subsp. floccosa Vernon H. Oswald 1991-4-24 4531 Butte Hwy 99 between Broyles Rd and Hamilton Nord Cana Hwy, north of Chico. Along drainages of the west side of Hwy 99. 59 Comment
  UCD116434  Limnanthes floccosa subsp. floccosa Jeff Dole 1986-4-27 s.n. Butte 1 mile north of Cayton Creek. Comment
  POM86002  Limnanthes striata C. C. Bruce 1897-06 s.n. Butte [No location information on label.] Comment
  CHSC112601  Limnophila X ludoviciana Lowell Ahart 2013-9-20 19062 Butte Along a ditch, 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
  CHSC46298  Limosella acaulis Vernon Oswald 1989-5-30 3790 Butte Sheep Camp Ditch and Vandergrift Lake on the w side of the n end of Cana-Pine Creek Rd. 54 Comment
  SEINET10496789  Linanthus bicolor Mary Susan Taylor 1980-4-16 Taylor 2491 Butte T21N R4E s sec 17 Cherokee quad. Lake Oroville State Recreation Area, up to 0.5 mi SE of Parish Camp, just S of Lime Saddle Memorial Park, ca. 5 mi S of Paradise; Foothill Woodland. 305 Comment
  CHSC24786  Linanthus dichotomus C. E. Stopher 1976-4-13 17 Butte 2.4 km s of Forest Ranch. 579 Comment
  CHSC2480  Linanthus dichotomus W. Fitzwater 1958-4-19 Butte Humboldt Rd., Chico area. On top of ridge. 457 Comment
  UC478476  Linanthus harknessii E. B. Copeland 1931-7-1 681 Butte Butte Creek Jonesville 1500 Comment
  CHSC64017  Lindernia dubia var. anagallidea B. Castro 1987-8-29 214 Butte At S edge of Butte Ck ca 2.1 mi S of Skyway and ca 1/4 miles E of Hwy 99 bridge. 60 Comment
  CHSC84014  Lindernia dubia var. anagallidea Lowell Ahart 2003-6-23 10305 Butte In a rice field, Peter Ahart Ranch, about 300 yards east of Palermo Honcut Highway, about 2 1/8 miles north of Honcut, about 12 miles south of Oroville. 30 Comment
  CHSC76029  Lindernia dubia var. dubia Vernon H. Oswald 1999-8-29 9839 Butte Gravel bar on the east side of the Sacramento River downstream from Ord Ferry Bridge at the northwest corner of Rancho Llano Seco. 28 Comment
  CHSC110975  Liquidambar styraciflua Lowell Ahart; Susan Bazell, Josephine Guardino, Wes Dempsey 2012-6-28 18233 Butte Lawn, on the northeast side of Sycamore Pool, Lower Bidwell Park Chico. 61 Comment
  CHSC20125  Liquidambar styraciflua M. S. Taylor 1975-5-6 563 Butte California State University, Chico, ca. 3 ft se of Little Cafeteria. 60 Comment
  CHSC103667  Lithophragma bolanderi Lowell Ahart 2010-4-30 16603 Butte Steep north slope, below rim and above cliffs, on the north side of a trail, west of disk golf area, on a ridge about 350 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 353 Comment
  CAS-BOT-BC430878  Lithophragma bolanderi Lowell Ahart 1987-12-5 5645 Butte South of Lumpkin Ridge Road, 1 1/2 miles east of Camp 18, about 8 miles north-east of Feather Falls 1280 Comment
  POM92061  Lithophragma bolanderi C. C. Bruce 1897-03 1842 Butte [No further location information] Comment
  CAS-BOT-BC432270  Lithophragma campanulatum A. A. Heller 1914-6-22 11955 Butte Little Summit near Butte Meadows 1463 Comment
  JEPS5851  Lithophragma heterophyllum Robert Kehlor 1951-4-14 32 Butte 6 1/4 mi e Oroville (J. M. Kehlor ranch); e of Oroville Comment
  CAS-BOT-BC123106  Lithophragma trifoliatum C. C. (Mrs.) Bruce 1897-4-1 1844 Butte Foothills near Chico Comment
  CAS-BOT-BC428451  Lithophragma trifoliatum Lowell Ahart 1980-3-26 2051 Butte Along Swedes Flat Road, near Bangor. 320 Comment
  CHSC38349  Logfia filaginoides Vernon Oswald 1983-4-18 336 Butte Upper Bidwell Park, Chico, on the north rim ca. 1.2 mi e of the power lines. Base of ridge along rim of a volcanic cap. 353 Comment
  CHSC46333  Logfia gallica Lowell Ahart 1989-5-10 6226 Butte At the end of the dirt road that leads to Lake Oroville, about 1/12 mile north-west of the West Branch Bridge across Lake Oroville. 280 Comment
  CHSC6662  Lolium multiflorum Marilyn Lee 1968-3-15 112 Butte East side of Cohasset Road, 100 yards north of entrance to Chico Airport. Comment
  UCR187080  Lomatium Anna M. Hurlbutt, Carl R. Weeks 2007-4-26 013 Butte Sierra Nevada Mtns., Paradise, < 0.25 mi N of Skyway, c. 5 mi E of Oroville Reservoir, bluffs above Hamlin Canyon, formed by Butte Cr. and Little Butte Cr. 488 Comment
  CHSC46326  Lomatium caruifolium var. denticulatum Lowell Ahart 1989-5-23 6230 Butte Along the edge of a new subdivision road, 1/4 mile east of Dunstone Drive, about 1/2 mile north of Bangor Park Road, west of Bangor. 76 Comment
  CHSC38736  Lomatium dasycarpum subsp. tomentosum Vernon Oswald 1983-3-13 164 Butte Upper Bidwell Park, Chico, beside Yahi Trail between Salmon Hole and Parking Area P (1.7 mi e of the power lines). 182 Comment
  SEINET10454776  Lomatium humile Mary Susan Taylor 1979-5-6 Taylor 1992 A Butte Peter & Lowel Ahart Ranch, Honcut; Valley Grassland. Comment
  SEINET10454533  Lomatium utriculatum Mary Susan Taylor 1980-4-19 Taylor 2534 Butte S side of Humbug, NE of Centerville. With J.D. Jokerst. 366 Comment
  POM67639  Lonicera hispidula var. vacillans C. C. Bruce 1897-06 1809 Butte [No location data on label] Comment
  UC1586631  Lonicera hispidula var. vacillans Lowell Ahart 1991-6-22 6664 Butte near Lake Oroville (bottom of the abandoned water ditch, w of Springtown Road) 304 Comment
  CHSC99544  Lonicera interrupta L. P. Janeway 2008-5-15 9409 Butte Cascade Range Foothills. Near the ridge top, about 25 m northwest of Hwy 32 about 4.2 air km south-southwest of Forest Ranch. 570 Comment
  CHSC106231  Lonicera japonica L. P. Janeway; B. Castro 2010-6-4 9992 Butte Sacramento Valley. Lower Bidwell Park, Chico; south side of Big Chico Creek, between South Park Drive and the creek, 425 m south of junction of South Park Drive and Centennial Ave. 78 Comment
  JEPS97342  Lotus corniculatus Lowell Ahart 1995-8-19 7612 Butte 1 mi N and 2 3/4 mi E of Honcut; Peter Ahart Ranch 36 Comment
  UC864838  Lotus grandiflorus var. grandiflorus A. A. Heller 1938-5-28 15125 Butte 25 mi from Oroville (on the Feather River Highway) Comment
  UC1129064  Lotus humistratus C. G. Albertus 1933-6-1 11 Butte 6 mi sw Paradise; Chico Quad. 152 Comment
  UC204729  Lotus humistratus A. A. Heller 1914-5-8 11377 Butte the Clear Creek to Paradise grade Comment
  SEINET12165761  Lotus nevadensis Unknown 1985-1 5039 Butte Enterprise Lauch Area, ca 3/4miW of Enterprise Bridge acroos Lake Oroville, NE of Oroville 274 Comment
  CDA13333  Lotus nevadensis var. nevadensis G. F. Hrusa, T. D. Wilfred 1996-7-9 13179 Butte Sierra Nevada; approx. 0.4 m from Hwy 162 on 22N89. Comment
  RSA406345  Lotus wrangelianus M. M. Boney 1897-1 1724 Butte Butte Comment
  CHSC75970  Ludwigia peploides subsp. montevidensis Lowell Ahart; Vernon H. Oswald 1999-8-13 8172 Butte Along the east side of the Sacramento River, northwest of Parrott Landing, about 1 mile southeast of Ord Ferry, about 2 miles southeast of Ordbend, about 12 miles (air) southwest of Chico. 32 Comment
  CHSC929  Lupinus albicaulis L. Nelson 1935-5-25 Butte Humboldt road. 457 Comment
  CAS-BOT-BC196250  Lupinus albifrons var. eminens A. A. Heller 1913-5-28 10764 Butte Eight miles north of Oroville 182 Comment
  RSA3766  Lupinus albifrons var. eminens A. A. Heller 1912-4-16 14340 Butte On the rocky slope of East butte, Marysville Buttes, in the Sacramento Valley. Comment
  CDA15390  Lupinus bicolor G. F. Hrusa 1997-4-3 13691 Butte Sierra Nevada; Near Paradise Lake dam along Old Railroad Grade Rd., approx. 3 m. N of Magalia. Comment
  JEPS119696  Lupinus bicolor Lowell Ahart 2012-5-2 17952 Butte West of the Government Pole Line, Upper Bidwell Park, about 1 mile east of Chico. Comment
  UCD107195  Lupinus bicolor A. A. Heller 1914-3-26 11227 Butte Canon hf Big Chico creek 6 miles east of Chico. Comment
  UCD107237  Lupinus bicolor A. A. Heller 1919-4-18 13109 Butte Canon of Mud creek above Richardson Springs. Comment
  CHSC7094  Lupinus bicolor var. tridentatus Nancy Wiseman 1969-4-17 Butte 10 yds n of Skyway, 3.8 mi e of Chico. Comment
  CHSC87796  Lupinus latifolius var. columbianus Paul Maslin 2004-4-6 12 Butte Sierra Nevada Range, west of Hwy 32 between Chico and Forest Ranch within Big Chico Creek Ecological Reserve (BCCER). UTM: 10611499E 4411082N. 548 Comment
  JEPS93938  Lupinus latifolius var. columbianus Vernon H. Oswald and Lowell Ahart 1998-8-11 9471 Butte Four Trees-Coyote Gap Road 0.4 mni w of Four Trees; Four Trees-Coyote Gap Road 1530 Comment
  CHSC90013  Lupinus microcarpus Peggy Fain 1991-4-21 25 Butte Along Richardson Springs Road, ca. 1 km. from Cohasset Highway. 152 Comment
  CHSC90509  Lupinus microcarpus var. densiflorus S. B. Collom 1988-4-24 3 Butte Ca. .3 mi e of entrance to Richardson's Spring Rd., off of Cohasset Highway, 1 mi ne of Chico Municipal Airport. Comment
  JEPS18176  Lupinus nanus Rimo Bacigalupi with G. T. Robbins and F. Chisaki 1956-4-19 5609 Butte along road to Oroville from Cherokee 3.5 mi n Cherokee (at top of descent into North Fork Feather River Canyon); top of descent into North Fork Feather River Canyon 396 Comment
  UCD69696  Lupinus nanus Ellen Hammond 1982-4-18 17 Butte Top of Table Mountain, along parking area. 396 Comment
  CHSC32139  Lupinus nanus var. vallicola L. Ahart 1975-5-12 778 Butte Along North Honcut Creek. Peter Ahart Ranch, Honcut. 45 Comment
  CHSC32763  Lupinus pachylobus J. D. Jokerst 1981-3-29 1280 Butte Top of North Table Mountain, ca. 1.0 mi N of Cherokee Rd. 373 Comment
  CHSC83988  Lupinus pachylobus Lowell Ahart 2003-4-8 10050 Butte Along the dirt road, about 1/8 mile northwest of the iron gate and fence, northwest of Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville. 326 Comment
  JEPS124190  Lupinus pachylobus Lowell Ahart 2015-3-24 19960 Butte Upper Bidwell Park, about 5 miles (air) northeast of Chico. Comment
  SEINET7040276 Image available Lupinus pachylobus A. G. Vestal 1963-5-9 s.n. Butte North of Oroville on Alternate 40 [presently Route 70]. Oroville Quadrangle UTM Zone 10, 620674mE, 4386722mN. Comment
  SBBG128005  Lupinus polyphyllus var. burkei L. Ahart 2010-9-21 17205 Butte ca. 70 yards E of the poor dirt rd, ca. 80 yards W of Big Kimshew Crk, ca. 1.5 mi NE of Jones Meadow, ca. 2.5 mi SE of Philbrook Reservoir 1917 Comment
  SEINET194919  Lupinus rubricaulis A. A. Heller 1942-5-18 16478 Butte About a valley oak tree in a grassy field a short distance west of the Hooker oak, east of Chico. Comment
  SEINET10870614  Lupinus vallicola subsp. vallicola Parker 1981-4-21 Parker 10 Butte Corolla bright blue, with pale spot on banner. Large population, ca 5 mi s of Pentz rd, 9.0 km e of hwy 70, ca 17 km ssw of paradise. Road drainage area. Soil a sandy gravel overlying rock. 160 Comment
  CHSC107577  Luzula cascadensis Lowell Ahart 2011-8-23 17652 Butte On the west edge of the large meadow, Pinkard Creek flows through the meadow east of the corral, about 1 miles north of Lost Creek Reservoir Dam, about 4 miles (air) northeast of Clipper Mills. 1133 Comment
  CHSC53714  Luzula macrantha L. P. Janeway 1988-7-2 2948 Butte At upper reach of Brush Creek, ca 1/5 mi S of 'town' of Brush Creek. 952 Comment
  UC1609042  Luzula parviflora Lowell Ahart 1993-7-23 7108 Butte about 6 air mi ne of Feather Falls (about 1/8 mi s of campgrounds on the large gravel bar along Fall River); s of Fall River 1036 Comment
  CHSC102828  Lychnis coronaria Lowell Ahart 2009-6-19 15935 Butte Along trail, onn the east side of Big Chico Creek, about 50 yards west ofTen Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 203 Comment
  CHSC38295  Lychnis coronaria Vernon Oswald 1983-5-31 585 Butte Upper Bidwell Park, Chico, on the n bank of Chico Creek ca. 300 ft w of Day Camp. 91 Comment
  CDA42943  Lycopus americanus L. Ahart 2012-10-2 18511 Butte In the marshy area on the north side of Big Chico Creek, south of Table 34, west of Cedar Grove, Lower Bidwell Park, Chico. Comment
  RSA0036439  Lycopus americanus Lowell A. Ahart 2012-10-20 18511 Butte In the marshy area on the north side of Big Chico Creek, south of Table 34, west of Cedar Grove, Lower Bidwell Park, Chico. 69 Comment
  SEINET10452837  Lythrum californicum Mary Susan Taylor 1978-9-8 Taylor 1904 Butte Around rice fields, ca. 6 mi N of Chico. 61 Comment
  CHSC102421  Lythrum hyssopifolia Lowell Ahart 2009-7-9 16011 Butte On damp soil, on the east side of the dirt road which is Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of highway 32, about 10 miles northeast of Chico. 236 Comment
  SEINET10452841  Lythrum hyssopifolia Mary Susan Taylor 1977-10-10 Taylor 1519 Butte Ca. 4-5 mi S of junction of Chico-Butte Hwy and Ord Ferry Road, ca. 20 mi S of Chico, on both sides of Chico-Butte Hwy; dried up Freshwater Marsh, and slough area. 30 Comment
  CHSC117462  Lythrum portula B. Castro; Sabrina Bell 2016-5-25 2133 Butte Sacramento Valley. Ca 1.1 air mi E of Hwy 99 off northeastern edge of Thermalito Afterbay, 0.7mi S of Nelson Ave and 0.1 mi S of the Afterbay perimeter road, along sinuous edge of swale darining from the NE into 'McKibben's Pond. 42 Comment
  CDA18880  Lythrum salicaria Riley, Villegas 2000-5-24 PDR 1170754 Butte Vicinity of Wyman Ravine, on the westside and eastside of Lincoln Blvd. 0 Comment
  RSA718743  Madia bolanderi L. Ahart 2006-7-25 13064 Butte About 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1570 Comment
  CHSC44272  Madia citrigracilis Vernon Oswald; Bruce Baldwin 1988-6-16 3388 Butte Camp Creek Rd. ca. 0.5 mi ene of Pulga. 512 Comment
  JEPS98925  Madia citrigracilis Bruce G. Baldwin, Vern Oswald 1988-6-16 716 Butte along Camp Creek Road, near Pulga 512 Comment
  CAS-BOT-BC342709  Madia elegans Lowell Ahart 1988-6-21 6056 Butte Along Poe Power House Road, about 3/4 mile north of the Poe Power House, about 1 1/4 miles south-east of Jarbo Gap 426 Comment
  CAS-BOT-BC342723  Madia elegans John Thomas Howell 1962-6-16 37608 Butte Feather River West Branch sw. of Nelson Bar 304 Comment
  CAS-BOT-BC342726  Madia elegans H. M. Hall 1914-7-18 9758 Butte Chico Creek, 5 mi. E. of Chico Comment
  CHSC25454  Madia elegans subsp. densifolia Marc Hayes; Warner 1977-9-12 103 Butte Along the middle branch of Clear Creek on the Butte College Campus, ca. 15 mi se of Chico. 82 Comment
  RSA0060842  Madia elegans subsp. densifolia Lowell A. Ahart 2012-10-28 18535 Butte On the north side of the paved park road, west of Table 27, north of Cedar Grove, Lower Bidwell Park, Chico. 69 Comment
  CAS-BOT-BC344308  Madia exigua L. P. Janeway 1995-6-19 4796 Butte About 0.5 mi east of the western end of Jackson Ranch Ridge 1097 Comment
  CHSC45692  Madia exigua Vernon Oswald 1987-4-14 2321 Butte Hwy 32 between Chico and Forest Ranch at the 17.0 mile marker. 390 Comment
  CHSC96217  Madia exigua R. Fischer 2006-5-30 981 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east -side addition along Hwy. 32. Plants growing along Guardian Trail at the junction of Pine Trail and adjacent a seasonal stream. 396 Comment
  CHSC25449  Madia glomerata Marc Hayes; Warner 1977-9-11 70 Butte Along road to Butte Meadows, exactly 5.8 mi from the turn to Butte Meadows on Hwy 32 onto Humboldt Road. 1127 Comment
  CAS-BOT-BC334652  Madia glomerata H. M. Hall 1914-7-22 9774 Butte Jonesville Comment
  CHSC37124  Madia gracilis L. Ahart 1982-9-13 3826 Butte Along dirt rd which is along Pinkard Creek, ca. 1/8 mi n of Lost Creek Reservoir Dam, ca. 2.2 mi nw of Strawberry Valley. 1100 Comment
  CAS-BOT-BC342958  Madia gracilis A. A. Heller No date on label 12816 Butte Butte Meadows 1402 Comment
  CAS-BOT-BC342961  Madia gracilis A. A. Heller 1914-8-6 11643 Butte About Chico Meadows 1219 Comment
  RSA0035822  Madia rammii Lowell A. Ahart 2008-6-13 14823 Butte About 350 yards southwest of the cemetery, about 50 yards north of Oregon Gulch, about 10 miles (air) northeast of Oroville. 305 Comment
  CHSC32363  Madia subspicata J. D. Jokerst; M. S. Taylor, R. A. Schlising, D. Ikeda 1980-5-18 722 Butte Top of Cohasset Ridge along the S edge above Mud Cr. Comment
  CHSC38380  Madia subspicata Vernon Oswald 1983-4-25 383 Butte Upper Bidwell Park, Chico, on the north rim at the level of the e end of Horseshoe Lake. 152 Comment
  CAS-BOT-BC347383  Malacothrix floccifera Lowell Ahart 1984-7-19 4723 Butte Above the dirt road that is about 1 1/2 miles south-east of Bald Mountain, 3/4 mile west of Oak Point, about 4 miles north-east of Stirling City 1500 Comment
  JEPS104310  Malva parviflora Lowell Ahart 2003-5-9 10122 Butte Along the sw corner of a prune orchard, on the n side of Evans Reimer Rd, ca 3/4 mi w of Block Rd, ca 3 mi (air) sw of Gridley. 24 Comment
  JEPS119994  Malva parviflora Lowell Ahart, Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17915 Butte Near table 17, on the north side of Centennial Avenue, Lower Bidwell Park, Chico. Comment
  SBBG128773  Malva pseudolavatera L. Ahart 2013-5-21 18702 Butte waste area along fence, W side of Hwy 99E, 30 yards N of W Rio Bonito Rd, ca. one mi NE of Biggs 31 Comment
  CHSC1038  Malva sylvestris J. Baynes 1929-4-21 Butte College Campus, Chico. 57 Comment
  CHSC52032  Marrubium vulgare B. Castro 1988-4-21 259 Butte At edge of Chico Cyn Rd just past hairpin turn where road turns away from Big Chico Ck and passes pistachio orchard at base of ridge. Naturalized fairly frequently along this strip on both sides of Big Chico Ck. on the e side of Chico. 91 Comment
  CHSC46037  Marsilea vestita Lowell Ahart 1978-5-15 1724 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 36 Comment
  HSC36095  Marsilea vestita George L. Williams 1962-4-12 Butte Oroville Comment
  SEINET10834130  Marsilea vestita Mary Susan Taylor 1980-8-15 Taylor 3253 Butte T21N R2E nw sec 36, Hamlin Canyon quad. Pentz vernal pool, 0.4 mi SE of jct of Pentz (Benum) Rd, and Hwy 99, ca. 10 mi S of Chico; Valley Grassland. With E. Pierce. 55 Comment
  CHSC105266  Marsilea vestita subsp. vestita Lowell Ahart 2010-6-20 16821 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
  UCD169295  Marsilea vestita subsp. vestita Lowell Ahart 2002-5-15 9659 Butte Gray Lodge State Wildfire Management Area, about 4 miles (air) southwest of Gridley. About 100 yards east of Parking Lot 10. 22 Comment
  CHSC38381  Matricaria discoidea Vernon Oswald 1983-3-14 176 Butte Upper Bidwell Park, Chico, on the north rim 2400 ft e of the power lines. Beside the North Rim Jeep Trail. 274 Comment
  CHSC2397  Meconella californica R. Carter 1965-3-14 164 Butte 457 Comment
  CHSC3950  Meconella californica E. P. Parreno 1967-3-26 Butte Upper Bidwell Park ca 400 yards NE of Chico Municipal Golf Course. Comment
  CHSC38515  Medicago arabica Vernon Oswald 1983-5-2 419 Butte Upper Bidwell Park, Chico, beside the dirt road which leads to the Police Pistol Range on the s edge of the Golf Course. 91 Comment
  RSA0035335  Medicago lupulina Lowell Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-5-10 18000 Butte On the west side of the horse path, about 20 yards north of the paved park road, west of the old walnut orchard, south of Vallombrosa Avenue, about 1/4 mile west of Peterson Drive, Lower Bidwell Park, Chico. 76 Comment
  CHSC38517  Medicago polymorpha Vernon Oswald 1983-4-4 261 Butte Upper Bidwell Park, Chico, on the north rim ca. 1.0 mi e of the power lines. 335 Comment
  CHSC75971  Medicago polymorpha Lowell Ahart; Vernon Oswald 1999-8-13 8162 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
  UCD107828  Medicago polymorpha A. A. Heller 1914-3-7 11186 Butte 8 miles north of Oroville. Comment
  UCR115081  Melica aristata G. Fred Hrusa, T. D. Wilfred 1996-7-9 13148 Butte Sierra Nevada Mtns., Plumas National Forest. Above Jordan Creek, south of Hwy 162 near Roger's Cow Camp 1250 Comment
  CHSC31704  Melica californica L. Ahart 1978-5-16 1732 Butte Along the edges of North Honcut Creek. Peter Ahart Ranch, Honcut. 50 Comment
  CHSC40455  Melica californica Lowell Ahart 1985-5-15 4974 Butte West of Lunt Road, about 1/2 mile north of the intersection of Lunt Road and Highway 70, north of Yankee Hill. 502 Comment
  CHSC42439  Melica californica Lowell Ahart 1987-5-9 5582 Butte 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
  CHSC38079  Melica fugax R. E. Preston 1982-7-21 350 Butte Ca. 1 mi SE of Philbrook Reservoir. 1828 Comment
  UC1609152  Melica geyeri Vernon H. Oswald and Lowell Ahart 1993-4-19 5282 Butte ene of Magalia (Rattlesnake Creek Trail, between Jordan Hill Rd and Sawmill Pk Lookout, along the lower part of the trail between the creek and the lookout) 719 Comment
  CDA13298  Melica harfordii G. F. Hrusa, T. D. Wilfred 1996-7-9 13146 Butte Plumas National Forest; Common colonies on dry, shaded slopes in coniferous understory above Jordan Creek S of Hwy 162 near Roger's Cow Camp. Perennial. Comment
  UC1562308  Melica stricta Vernon Oswald and Lowell Ahart 1990-7-19 4374 Butte ca 3 mi e Philbrook Reservoir (slope on s side of Philbrook Creek, 0.6 mi w of the Plumas County line) 1950 Comment
  POM196130  Melica subulata E. B. Copeland 1929-7-16 338 Butte Jonesville. 1550 Comment
  RSA4653  Melica subulata E. B. Copeland 1929-7-16 338 Butte Jonesville. 1550 Comment
  UCD88607  Melica subulata E. B. Copeland 1929-7-16 338 Butte Jonesville. 1500 Comment
  JEPS87139  Melica torreyana Lowell Ahart 1992-5-9 6766 Butte ca. 2 (air) mi. n. Oroville (w. side of small stream, e. of Cherokee Rd., Lake Oroville Recreation Area); Lake Oroville Recreation Area 91 Comment
  CHSC31836  Melilotus albus L. Ahart 1978-7-15 1788 Butte Along edges of North Honcut Creek, Peter Ahart Ranch, Honcut. 50 Comment
  UCD108073  Melilotus indicus A. A. Heller 1914-7-13 11567 Butte Mt. Ida Ranch, 10 miles east of Oroville. Comment
  CHSC25294  Melissa officinalis M. S. Taylor 1977-7-15 1415 Butte On n side of Butte Creek directly beneath Covered Bridge, ca. 8 mi e of Chico. 243 Comment
  JEPS119627  Melissa officinalis Lowell Ahart 2012-6-14 18195 Butte About 100 yards east of Mangrove Avenue, Annie's Glen, Lower Bidwell Park, Chico. Comment
  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
  CHSC43839  Mentha canadensis B. Castro 1987-8-25 212 Butte At s edge of Butte Ck ca 1/2 mi e of its crossing of Hwy 99 (ca 2.1 mi s of Skyway in Chico). 68 Comment
  CHSC89463  Mentha canadensis R. D. Fischer 2004-7-21 450 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition along Hwy. 32. Located at bottom of 10-Mile House Road near end of park property. In mdw along drainage, between road and Big Chico Creek. 216 Comment
  JEPS98512  Mentha pulegium Lowell Ahart 2000-7-17 8593 Butte On the west side of North Honcut Creek, Peter Ahart Ranch, about 1 1/2 miles north and 2 3/4 miles east of Honcut, about 12 miles (air) southeast of Oroville. 51 Comment
  CHSC45299  Mentzelia dispersa Vernon Oswald; Lowell Ahart 1987-7-1 3053 Butte Scotts John Rd. 1.3 mi n of the road connecting Humboldt and Humbug Rds, ca. 2.5 mi ene of Jonesville. Scattered on a massive, dry, outcrop of metavolcanic rock on the w side of Scotts John Creek. 1828 Comment
  CHSC11074  Mentzelia laevicaulis Lowell Ahart 1968-7-27 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC21148  Micranthes californica M. S. Taylor 1975-3-10 416 Butte On s side of Butte Creek, ca. 1/4 mi w of Covered Bridge, ca. 8 mi e of Chico. Comment
  CHSC87439  Micranthes integrifolia R. D. Fischer 2004-3-31 103 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition along Hwy. 32. Collected at junction of Guardian Trail and Pine Trail near seasonal drainage. 396 Comment
  CAS-BOT-BC429203  Micranthes oregana A. A. Heller 1914-6-22 11493 Butte Chico Meadows 1219 Comment
  UCR187081  Micropus californicus Anna M. Hurlbutt, Carl R. Weeks 2007-4-26 012 Butte Sierra Nevada Mtns., Paradise, < 0.25 mi N of Skyway, c. 5 mi E of Oroville Reservoir, bluffs above Hamlin Canyon, formed by Butte Cr. and Little Butte Cr. 488 Comment
  CAS-BOT-BC348700  Microseris acuminata Lowell Ahart 1979-5-11 s.n. Butte Peter Ahart Ranch. Honcut 50 Comment
  UCD80104  Microseris douglasii subsp. douglasii CNPS SN Foothill Team 2005-4-13 SNFN 0080 c Butte Private Rock Ranch (horse ranch) owned by Chris and Maria Rock. The plot location on the ranch is near the SE corner of the south pasture, approximately 25 m from the south fence. 92 Comment
  CHSC37139  Mimetanthe pilosa L. Ahart 1982-8-22 3752 Butte Along edges of North Honcut Creek, a little sw of the Peter Ahart Ranch, ca. 1 mi n and 2 and 3/4 mi e of Honcut. 50 Comment
  RSA169398  Mimulus aurantiacus var. grandiflorus L. S. Rose 1963-6-5 63139 Butte North Fork of Feather River, Arch Rock Tunnel. 488 Comment
  SEINET10570207  Mimulus breweri Mary Susan Taylor 1978-7-19 Taylor 1775 Butte On E side of Upper Scotts John Road, ca. 3 mi N of its junction with Scotts John Road, ca. 7 mi E of Jonesville. 1890 Comment
  POM5060  Mimulus glaucescens A. A. Heller, H. E. Brown 1902-5-6 s.n. Butte Berry Canyon (near Clear Creek). Comment
  SEINET12334054  Mimulus glaucescens Unknown 1974-1 20 Butte Cohasset Rd, N ca 7.5 mi from Chico Muni. Airport & 7.5 mi from Cohasset 305 Comment
  JEPS114732  Mimulus guttatus Lowell Ahart 2008-5-12 14737 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
  SEINET8269133  Mimulus guttatus C. E. Wickstrom 1964-3-3 15 Butte north rim of Big Chico Creek Canyon, vic. of Salmon Hole, upper Bidwell Park; Cico. Comment
  UC725754  Mimulus latidens A. A. Heller 1940-5-13 15615 Butte 3 mi w Chico (on State Highway #32) 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
  CHSC94622  Mimulus moschatus Lowell Ahart 2006-9-11 13294 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
  SBBG28815  Mimulus primuloides E. B. Copeland 1929-7-13 459 Butte Jonesville Comment
  CHSC93973  Mimulus pulsiferae R. D. Fischer 2004-6-20 752 Butte Sierra Nevada Mountains, north-east corner of Butte County and ca. 4 miles north of Butte Meadows off Scout Road. Boy Scout Camp. Collected off a dirt road running on the east side and parallel to Chico Meadows. 1371 Comment
  UC1562310  Mimulus tilingii Vernon Oswald and Lowell Ahart 1990-7-19 4376 Butte ca 3 mi e Philbrook Reservoir (ca 0.4 mi w of Plumas Co. line, s side of creek); Philbrook Creek 1920 Comment
  JEPS14948  Mimulus torreyi Miss Kate Conger 1907-1 Butte Brush Creek Comment
  UC336556  Mimulus tricolor Edw. L. Greene June 1890 Butte Chico Comment
  SEINET12326992  Mimulus tricolor Unknown 1984-1 16 Butte Oroville, flat area 10 yd S of Cottonwood Rd, 1.8 mi E of its junction with Hwy 99 46 Comment
  CHSC208  Minuartia californica P. Delaplane 1965-3-10 39 Butte In back yard of 817 Rio Chico Way, Chico. 30 Comment
  UCD80209  Minuartia californica CNPS SN Foothill Team 2005-5-4 SNFN 0200 b Butte City of Chico, Bidwell Ranch, about 1.33 miles NW of the end of Wildwood road. 88 Comment
  CHSC62724  Minuartia douglasii L. P. Janeway 1993-5-2 4335 Butte Serpentine ridge, south of Serpentine Point and above Hwy. 70. 518 Comment
  CHSC37433  Moehringia macrophylla R. A. Schlising 1982-5-19 4250 Butte E of village of Feather Falls at Lumpkin ridge. 1280 Comment
  UC204576  Mollugo verticillata A. A. Heller 1914-6-2 11473 Butte land 8 mi n of Oroville Comment
  CHSC50675  Monardella breweri subsp. lanceolata Lowell Ahart 1990-5-25 6496 Butte Near the high water line of Lake Oroville, about 1/4 mile west of the Enterprise Boat Launch Area, about 1 1/4 miles north-west of the Enterprise Bridge across Lake Oroville. 277 Comment
  UCSB63980  Monardella douglasii Jokerst, James; Castro, Barbara 1992-5-19 Butte Powerline site in the unnamed canyon N of Nugen Canyon; on the S side of Neal Rd; near the Butte County Sanitary Landfill: T21N R2E NEW NE'/i Sect. 14; Valley and Foothill Grassland within Blue Oak Woodland; Cascade Range Foothills 83 Comment
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Jul 19 2018
  CHSC67987  Monardella odoratissima James D. Jokerst 1989-7-3 3125 Butte Hwy. 70 4.05 mi E of Concow turnoff. Comment
  LA87862  Monardella odoratissima Elizabeth McClintock; 1968-8-1 sn Butte Feather River, Pulga Bridge Comment
  CAS-BOT-BC215537  Monardella odoratissima subsp. pallida A. A. Heller 1917-7-29 12860 Butte Summit above Jonesville 2133 Comment
  JEPS120836  Monardella sheltonii Lowell Ahart 2013-7-1 18819 Butte About 30 yards SW of the intersection of Forbestown Road and Black Bart Road, about 3.25 air miles SW of Forbestown. Comment
  UC726300  Monardella villosa subsp. villosa A. A. Heller 1923-6-9 13742 Butte Oroville Comment
  HSC32652  Montia fontana David Johnson 1974-4-20 57 Butte Table Mtn. Comment
  CHSC31854  Montia fontana subsp. amporitana L. Ahart 1974-2-12 300 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC34701  Montia linearis M. S. Taylor 1981-5-6 3624 Butte W side of rd leading to Jackson Ranch, ca. 1 mi sw of its jct with 21N254.1, ca. 5 air mi n of Feather Falls. 1127 Comment
  CAS-BOT-BC445036  Montia linearis A. A. Heller 1919-5-18 13179 Butte Mosquito Creek between Appleton and Coutelence Comment
  CHSC45394  Montia parvifolia Vernon Oswald 1984-6-11 1273 Butte Humboldt Rd. between Lomo and Butte Meadows, 2.0 mi ne of Hwy 32. 1380 Comment
  JEPS117911  Montia parvifolia L. P. Janeway 2008-6-22 9429 Butte Along Four Trees Road crossing of South Branch Mill Creek (a tributary to North Fork Feather River) North Fork Feather River (2.7 air km east of Pulga Bridge (Hwy 70) over); Northern High Sierra Nevada 823 Comment
  CAS-BOT-BC73671  Morus alba John Thomas Howell 1961-9-22 36738 Butte Sierra Nevada - bank of Feather River, Oroville. 53 Comment
  CHSC102477  Morus alba L. P. Janeway 2009-10-13 9951 Butte Cascade Range Foothills. Upper Bidwell Park, Chico; south side of Big Chico Creek along South Rim Trail/Annie Bidwell Trail/Guardian Trail 275 m west of the high power lines. 109 Comment
  CHSC108765  Morus alba L. P. Janeway 2011-5-9 10252 Butte Sacramento Valley. South side Feather River just east of Bedrock Park, Oroville; about 10-15 m back from the edge of the water. 42 Comment
  CHSC109628  Morus alba Lowell Ahart 2012-5-17 18088 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
  JEPS119543  Morus alba Lowell Ahart, Linnea Hanson, Susan Bazell, Josephine Guardino 2012-4-16 17859 Butte East of the Deer Pen, south of Table 11, Lower Bidwell Park, Chico. Comment
  JEPS119751  Morus alba Lowell Ahart 2012-5-17 18088 Butte On the south edge of Big Chico Creek, east of the Deer Pen, between Table 12 & 13, Lower Bidwell Park, Chico. Comment
  CHSC46691  Muhlenbergia andina V. Oswald; L. Ahart 1989-8-15 3937 Butte Soda Ridge Rd, 1.4 mi w of its junction with Coon Hollow Rd, ca. 1.2 mi (air) n of Philbrook Reservoir. On the edge of a lake n of and visible from the road. 1752 Comment
  CHSC103439  Muhlenbergia filiformis Lowell Ahart 2009-11-19 16546 Butte About 80 yards southeast of the gate, about 70 yards east of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico. 269 Comment
  CHSC38833  Muhlenbergia filiformis Vernon Oswald 1982-10-22 3 Butte Bidwell Park, Chico. Seep ca. 50 ft s of Upper Park Rd ca. 3.1 mi e of its junction with Wildwood Ave at a place called Diversion Dam. 121 Comment
  JEPS120698  Muhlenbergia filiformis Lowell Ahart 2013-10-26 19223 Butte On the bottom and sides of a small drainage on the bottom of Snag Lake, about 4 air miles north of Philbrook Reservoir Comment
  POM196131  Muhlenbergia filiformis E. B. Copeland 1929-7-16 339 Butte Jonesville 1550 Comment
  JEPS120099  Muhlenbergia mexicana Lowell Ahart 2012-6-21 18217 Butte On the south side of Big Chico Creek, about 20 yards west of the Freeway, Lower Bidwell Park, Chico. 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
  CAS-BOT-BC274934  Muhlenbergia rigens Lowell Ahart 1977-2-20 s.n. Butte Peter Ahart Ranch, Honcut Comment
  CHSC62368  Myosurus minimus B. Castro 1990-4-21 419 Butte Ca 3 mi SW of Paradise, off Honey Run Rd. In depression of old house pad. 140 Comment
  JEPS118078  Myosurus minimus Lowell Ahart 2011-5-2 17349 Butte Open pasture field, about 100 yards west of the dredged edge of North Honcut Creek, about 2 1/2 miles north and 2 1/2 miles east of Honcut, about 12 miles southeast of Oroville 58 Comment
  CHSC45962  Myosurus minimus subsp. minimus Lowell Ahart 1974-3-18 324 Butte On the bottom of a vernal pool, Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut, about 12 miles south of Oroville. 39 Comment
  SEINET10965657  Myosurus minimus var. apus Lowell Ahart 1991-5-20 Ahart 6656 Butte On the north side of Rutherford Road, Gray Lodge Waterfowl Management Area, about 1/4 mile west of Pennington Road, about 10 miles southwest of Gridley. Freshwater Marsh. T17N R1E S13. 20 Comment
  CHSC37394  Myriophyllum spicatum R. A. Schlising 1980-8-31 3978 Butte Richvale Vernal Pools, 1/4 mi s of jct of Hwy 162 to Oroville and Hwy 99, along latter and across from Thermalito Afterbay. Comment
  CHSC48464  Nama lobbii Vernon Oswald 1983-7-19 885 Butte Bull Hill Rd. 2.6 mi s of Butte Meadows. 1493 Comment
  UCD87723  Nassella cernua P. B. Kennedy 1914-5-1 4754 Butte Buttte County: Comment
  CHSC105821  Navarretia divaricata subsp. divaricata Lowell Ahart 2010-9-28 17249 Butte On the west side of Big Kimshew Creek, about 100 yards east of the poor dirt road, about 1-1/2 miles (air) northeast of Jones Meadow, about 2-1/2 miles (air) southeast of Philbrook Reservoir. 1886 Comment
  CHSC45426  Navarretia divaricata subsp. vividior Lowell Ahart 1984-7-19 4729 Butte Along the edge of the dirt road where there is a seep, about 1 1/2 miles south-east of Bald Mountain, 3/4 mile west of Oak Point, about 4 air miles north-east of Stirling City. 1371 Comment
  SEINET7373988 Image available Navarretia filicaulis Lowell Ahart 2013-7-1 18818 Butte Three and one-quarter miles SW of Forbestown, intersection of Forbestown Rd. and Black Bart Rd. 150 yds E of intersection. Comment
  JEPS104465  Navarretia heterandra Lowell Ahart 2003-5-27 10216 Butte Rifle and Trap Range, ne of Horseshoe Lake, n of Parking Area E, Upper Bidwell Park, ca 1 1/2 mi e of Manzanita Avenue, Chico. 103 Comment
  POM74491  Navarretia intertexta Edward Palmer 1892-6-7 2080 Butte Near Chico. Comment
  CHSC27992  Navarretia leptalea M. S. Taylor 1978-7-18 1688 Butte On n side of Old Humboldt Rd, ca. 1 mi e of jct of Old Humboldt Rd and Hwy 32. 1326 Comment
  CHSC1295  Navarretia leucocephala J. Gulick 1929-4-18 Butte Rifle Range, near Chico creek. 76 Comment
  CHSC7090  Navarretia leucocephala R. Smallwood 1969-5-1 3 Butte 20 yds. e of main entrance to Chico Municipal Airport, on Cohasset Highway 3 mi ne of Chico. 36 Comment
  SD120581  Navarretia leucocephala B. Ertter, Jeff Strachan 1980-5-5 3256 Butte Peter Ahart Ranch ca 1.5 mi northeast of Honcut between Oroville and Marysville, pasture north of house 29 Comment
  CHSC45358  Navarretia nigelliformis subsp. nigelliformis Vernon Oswald 1988-4-18 3274 Butte Harter's Cherokee Ranch located on the w side of Hwy 99 between Hwy 149 and Dry Creek. 53 Comment
  CHSC12747  Navarretia pubescens L. V. Ritter 1969-5-5 262 Butte Ca 200 yds. w of Horseshoe Lake, Bidwell Park, 50 yds. n of the Park Rd. Comment
  CHSC46223  Navarretia pubescens Pauleen Broyles 1987-6-19 1058 Butte Ca 13 km ne of Oroville. Ca 1.6 km s of Crystal Hill between middle and south forks of Feather River on Lake Oroville. Along a dirt road. 360 Comment
  CHSC91119  Navarretia pubescens Lowell Ahart 2005-5-28 11819 Butte Pasture, on the south side of Nelson Avenue, east of the bridge across the Thermalito Forebay, Thermalito. 67 Comment
  UCD80645  Navarretia pubescens CNPS SN Foothill Team 2005-5-28 SNNR 0207 b Butte City of Chico, Upper Bidwell Park, on the east side of Big Chico Creek where the plateau above the creek ends. 159 Comment
  CHSC33128  Navarretia subuligera J. D. Jokerst 1981-5-11 1310 A Butte Top of Doe Mill Ridge. 457 Comment
  CHSC36706  Navarretia tagetina D. H. Ikeda 1980-5-8 347 Butte 0.3 mi n of intersection of Pentz Rd. and Williams Rd. on e side of the road. Comment
  RSA0006287  Nemacladus montanus E. Brooks s.n. Butte Enterprise. Comment
  CHSC46196  Nemophila heterophylla L. P. Janeway 1988-7-2 2964 Butte Near the road to French Cr, 0.9 mi S of Coyote Gap. 1188 Comment
  UC1292078  Nemophila heterophylla A. A. Heller 1926-3-24 13913 Butte along Chico Creek about 4 mi e Chico; e of Chico, Chico Creek Comment
  CHSC31688  Nemophila pedunculata L. Ahart 1973-3-7 163 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET10638522 Image available Nemophila pedunculata H. E. Brown 1897-3-3 Brown 173 Butte Clear Creek. Comment
  CHSC11970  Nemophila spatulata E. B. Copeland 1930-6-28 445 Butte Jonesville. 1650 Comment
  CHSC27227  Nerium oleander P. Moyer 1971-10-8 40 Butte CSUC Campus. W front of Bldg. 'A'. 60 Comment
  CHSC61338  Nicotiana acuminata var. multiflora Lowell Ahart 1993-7-22 7069 Butte At Camp 18, about 5 (air) miles north-east of Feather Falls. 1219 Comment
  JEPS124133  Nicotiana acuminata var. multiflora Lowell Ahart 2015-11-7 20625 Butte West of the parking area at the end of Old Highway Alternate 40, strand of Lake Oroville, Dark Canyon, about 4 miles (air) south of Highway 70, about 8 miles (air) southeast of Paradise. Comment
  CHSC34016  Nicotiana glauca L. Ahart 1981-7-18 2942 Butte In the burrow area ca. 4.5 mi sw of Oroville. Along the dirt rd near the base of the levee. 35 Comment
  CHSC65691  Nicotiana glauca Vernon H. Oswald 1996-3-29 7276 Butte Sacramento Valley. Sacramento River National Wildlife Refuge, Llano Seco Unit. On the riprapped bank of the Sacramento River at the N end of Riparian Sanctuary. 30 Comment
  CHSC38723  Nicotiana quadrivalvis Vernon Oswald 1983-6-13 669 Butte Upper Bidwell Park, Chico, 100 ft s of the footbridge at the Golf Course. 91 Comment
  CHSC50822  Nothocalais alpestris Vernon Oswald; Lowell Ahart 1990-7-19 4377 Butte South side of Philbrook Creek, ca. 3 mi east of Philbrook Reservoir, ca. 0.1 mi west of the Plumas County line. 1950 Comment
  UC1562311  Nothocalais alpestris Vernon Oswald and Lowell Ahart 1990-7-19 4377 Butte ca 3 mi e Philbrook Reservoir (ca 0.1 mi w of the Plumas County Line); s side of Philbrook Creek Comment
  SBBG25316  Notholithocarpus densiflorus var. densiflorus F. C. Raney 1964-9-10 Butte 10 mi NE of Feather Falls Comment
  CHSC90657  Nuttallanthus canadensis Samatha Mackey Hillaire; Charles Hooks 2005-4-9 1213 Butte North Table Mountain Plateau. Shore of AL Chaffin Reservoir, SE side. 298 Comment
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Jan 18 2011
  CHSC42195  Odontostomum hartwegii J. P. Arts 1986-4-18 16 Butte Ca. 1 mile s of the covered bridge on Humbug Rd., ca. 5 miles ne of Chico on the n side of the road. NW/4 Oroville. 91 Comment
  JEPS22684  Odontostomum hartwegii Rimo Bacigalupi with Drs. Herbert and Lucille Mason 1958-4-24 6323 Butte 1 mi. n. Chico airport (along Cohasset Rd., drainage of Mud Creek) 91 Comment
  SBBG57427  Odontostomum hartwegii A. A. Heller 1926-4-28 13933 Butte 4 mi N of Chico on the Richardson Springs rd Comment
  SEINET10905074  Odontostomum hartwegii Mary Susan Taylor 1986-5-6 Taylor 5625 Butte Butte County; Upper Bidwell Park, Chico, in open Valley Grassland between Horseshoe Lake and Omicron Enclosure. With Vern Oswald and Lowell Ahart. 200 ft. 229 Comment
  CHSC98693  Olea europaea L. P. Janeway 2007-12-17 9226 Butte Northern Sierra Nevada Foothills. About 15 m east of the east edge of Thermalito Diversion Pool (the bed of the Feather River pooled at a constant 68 m elevation level), about 370 m north of the railroad bridge. At base of old abandoned railroad or road cutbank. 73 Comment
  JEPS117516  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
  UC1586570  Ophioglossum californicum Lowell Ahart 1991-3-11 6642 Butte ca. 2 1/2 mi n and 3 3/4 mi e Honcut (ca. 12 mi se of Oroville, Joie Osgood Ranch) 91 Comment
  CAS-BOT-BC349987  Oreostemma alpigenum var. andersonii H. F. Copeland 1920-7-11 55 Butte Scotch John Meadows 1828 Comment
  CHSC25436  Oreostemma alpigenum var. andersonii Marc Hayes; Warner 1977-9-11 71 Butte Ca. 10 m N of Humboldt Rd., exactly 6.9 mi from the turn to Butte Meadows along Hwy 32. 1219 Comment
  CHSC44286  Orobanche fasciculata V. Oswald; L. Ahart 1988-6-17 3393 Butte Hillside at the n side of the dam at Lost Creek Reservoir. 1036 Comment
  JEPS26743  Orobanche fasciculata P. C. Hutchison 1961-6-9 2095 Butte Canyon of the north fork of the Feather River along highway US, 1 mile south of (above) Pulga Bridge. Comment
  CHSC69043  Orthilia secunda Lowell Ahart 1997-8-1 7780 Butte Near some small streamlets of Little Kimshew Creek, in Snow Meadow, about 1/4 mile east of Table Mountain, about 8 miles (air) northeast of Stirling City. 1524 Comment
  UC1609416  Orthilia secunda Lowell Ahart 1993-7-29 7130 Butte about 1/8 mile south west of the Snow Mine, about 2 1/2 miles east of Bald Mountain, about 6 1/2 miles north-east of Stirling City 1463 Comment
  RSA189382  Orthocarpus attenuatus L. S. Rose 1967-5-6 67055 Butte Oroville. 52 Comment
  SEINET10549648  Orthocarpus attenuatus Mary Susan Taylor 1975-4-11 Taylor 455 Butte Ca. 1/4 mi E of Salmon Hole, between Chico Creek and Upper Bidwell Park Rd, Upper Bidwell Park, Chico. Associates: Quercus spp., Pinus sabiniana, Galium aparine, Brodiaea hyacinthina. Foothill Woodland. 183 Comment
  SEINET10549691  Orthocarpus lacerus Mary Susan Taylor, Vernon H. Oswald 1984-4-4 Taylor 5393 Butte T23N R3E sec 27? S side of Humbug Rd, ca. 2 mi SW of Nimshew, ca. 12 air mi NE of Chico. Open rocky bare slope within Foothill Woodland. Comment
  CHSC89744  Osmorhiza occidentalis L. P. Janeway; Robert F. C. Naczi 2004-7-23 8181 Butte High Cascade Range. Forested slope about 0.3 km southeast of the east end of Philbrook Reservoir. Northwest-facing slope. 1707 Comment
  CHSC21007  Oxalis corniculata M. S. Taylor 1975-4-6 438 Butte In lawn, e side of 1200 block of Arcadian, Chico. 60 Comment
  JEPS121894  Oxalis corniculata Lowell Ahart 2014-11-24 19920 Butte About 10 feet below the high water line of Lake Oroville, about 500 yards east of the second parking area, old Bidwell Bar Road, about one mile south of Oroville Quincy Highway, about 8 miles (air) northeast of Oroville. Comment
  HSC73009  Oxypolis occidentalis M. S. Taylor, L. Ahart 1981-8-15 4193 Butte N side of Coon Hollow Rd (26N74), 1.2 mi. E of its junction with Humbug Rd., 12 mi. NE of Stirling City 1677 Comment
  UCD77993  Packera eurycephala Robert E. Preston 2001-7-9 1672 Butte Magalia, on serpentine outcrops along e side of The Skyway, between Coutelenc Rd and Magalia Dam, 682 Comment
  CHSC101489  Packera eurycephala var. lewisrosei Samantha Mackey Hillaire 2008-6-12 1254 Butte Lassen National Forest, administered by Plumas National Forest. Powerline survey, on Rocky Ridge. East of intersection of Rim Road (23N06) and 23N06C. Approx. 1 airmile SSW of Pulga. Also T22N, R04E, S01. Area centered on roughly 631167.524638359, 4406717.59894074. 975 Comment
  UC854374  Paeonia brownii A. A. Heller 1915-6-11 12046 Butte Jonesville Sierra Nevada 1676 Comment
  CHSC45210  Panicum acuminatum Lowell Ahart 1984-7-19 4726 Butte On road banks, about 1 1/2 miles south-east of Bald Mountain, 3/4 mile west of Oak Point, about 4 air miles north-east of Stirling City. 1371 Comment
  CAS-BOT-BC253703  Panicum capillare Lowell Ahart 1981-8-15 3042 Butte Snag Lake, about 3 miles S of Jonesville 1524 Comment
  CHSC37106  Panicum capillare L. Ahart 1982-10-15 3890 Butte On bottom of North Honcut Creek, ca. 2.7 mi ne of Honcut. 50 Comment
  JEPS115064  Panicum capillare Lowell Ahart 2007-10-31 14513 Butte West of the official parking area, strand of Lake Oroville, Foreman Creek Area, about 1 mile south of Highway 162 (Oroville Quincy Road), about 7 miles (air) northeast of Oroville 224 Comment
  SEINET10563835  Panicum huachucae var. fasciculatum Mary Susan Taylor 1979-8-4 Taylor 2178 Butte T23N, R5E center of S border sec. 22/27. Ca. 1 mile N of Cresta Powerhouse on Hwy. 70, ca. 30 miles N of Oroville; granitic soils. Comment
  CHSC36099  Parnassia palustris R. A. Schlising; K. Tarp 1982-7-24 4337 Butte E of Stirling City at West Branch of the Feather River, below Diversion Dam on Retson Road. 975 Comment
  JEPS104347  Parvisedum pumilum Lowell Ahart 2003-4-10 10082 Butte Near the easat 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
  JEPS110468  Paspalum dilatatum Lowell Ahart 2006-9-28 13384 Butte On the east side of the North Fork of the Feather River, on the west side of Hightway 70, about 50 yards southwest of the Shady Rest Area south of the Arch Rock Tunnel 445 Comment
  CHSC39613  Paxistima myrsinites Lowell Ahart 1983-3-28 3909 Butte Found on the east bank of Woodleaf Creek, above the road, about 3/8 mile southwest of the Forbestown Res., about 4 miles northeast of Forbestown. 450 Comment
  CHSC103679  Pectocarya pusilla Lowell Ahart 2010-4-30 16595 Butte Below rim and above cliffs, north side of disk golf area, on a ridge about 250 yards west of Highway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 360 Comment
  CHSC46759  Pectocarya pusilla Lowell Ahart 1980-5-4 2213 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
  JEPS117133  Pectocarya pusilla Lowell Ahart 2010-5-7 16615 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
  JEPS119983  Pectocarya pusilla Lowell Ahart 2012-4-30 17936 Butte On the east side of Guardian Trail about 300 yards north of Humboldt Trail, north of Bloody Pin Trail, about 1/8 mile west of Highway 32, about 8 miles northeast of Chico, south part of Upper Bidwell Park. Comment
  RSA715882  Pectocarya pusilla L. Ahart, Paul Maslin, John Dittes 2005-3-17 11671 Butte On the east side of a very poor dirt road, about 1/4 mile west of the Indian Cave, about 1 mile west of Big Chico Creek, about 4 1/4 miles (air) northeast of Chico. 488 Comment
  UC177581  Pedicularis attollens H. M. Hall 1914-7-22 9771 Butte near Jonesville (on Willow Creek); Willow Creek 1554 Comment
  UC1562399  Pellaea andromedifolia Lowell Ahart 1990-5-28 6503 Butte ca. 2 1/2 mi ne of East Gridley (s of Palm Ave, ca. 1/2 mi e of Larkin Rd) 30 Comment
  CAS-BOT-BC67554  Pellaea mucronata E. B. Copeland 1899-4-1 s.n. Butte Chico Comment
  CHSC28987  Pellaea mucronata M. S. Taylor 1980-3-19 2391 Butte Macabes Creek Canyon, ca. 100 ft e of Lumpkin Rd, ca. 2 1/2 mi n of its jct with Forbestown Rd, ca. 18 mi ne of Oroville. 396 Comment
  CHSC30367  Pellaea mucronata J. D. Jokerst 1979-3-20 1151 Butte Top of North Table Mt, W edge at the waterfalls of the S branch of Coal Cr. Canyon. 365 Comment
  CHSC97017  Pellaea mucronata var. mucronata L. P. Janeway 2007-6-19 9064 Butte Northern High Sierra Nevada. Plumas National Forest; along the dirt road to the upper end of the penstock of the Forbestown Pow-erhouse; 2.4 air km east-northeast of Ponderosa Dam, 500 m northeast of South Fork Feather River. 556 Comment
  UC382578  Pellaea mucronata var. mucronata Mrs. R. M. Austin May 1896 221 Butte Iron Canyon Comment
  SEINET194311  Penstemon azureus A. A. Heller 1938-5-28 15117 Butte 23 miles o\\from Oroville on the Feather River Highway in Arid Transition Zone. Comment
  CHSC114692  Penstemon azureus J. R. Keck Jr. 1978-5-23 Butte Highway 70, Jarboe Gap. Near Poe Power House. Roadside. Comment
  CHSC64668  Penstemon azureus var. azureus H. H. Schmidt; M. Merello, L. Woodruff 1993-6-15 868 Butte Plumas National Forest. On state road 23N06 ca. 3 miles N of the junction with hwy 70. 1010 Comment
  NY571181  Penstemon azureus var. azureus J. T. Howell 1962-6-16 37546 Butte Sierra Nevada; Magalia 731.5 Comment
  NY609844  Penstemon deustus var. suffrutescens E. B. Copeland 1931-6-11 690 Butte Jonesville 1600 Comment
  RSA4117  Penstemon gracilentus E. B. Copeland 1930-7-6 457 Butte Above Jonesville 1950 Comment
  CHSC1866  Penstemon heterophyllus var. purdyi L. Oliver; D. Sloan 1935-5-10 Butte Butte Creek Canyon. Comment
  NY601766  Penstemon heterophyllus var. purdyi A. A. Heller 1926-4-21 13926 Butte Along Rock Creek, 7 miles north of Chico. Comment
  CHSC30303  Penstemon laetus var. leptosepalus M. S. Taylor 1980-5-27 2730 Butte N side of Oroville-Quincy Hwy, ca. 2 mi s of Lake Madrone. 609 Comment
  SEINET10548068  Penstemon newberryi Mary Susan Taylor 1980-8-2 Taylor 3217 Butte T27N R5E center sec 32, Jonesville quad. Humboldt Peak, N tip of the county. 2155 Comment
  CHSC69056  Penstemon personatus Lowell Ahart 1997-8-1 7803 Butte On the north side of the County Road, southwest of Keyser Creek, about 1 1/2 miles southeast of Bald Mountain, about 6 miles (air) northeast of Stirling City. 1432 Comment
  JEPS94326  Penstemon personatus Lowell Ahart 1997-8-1 7803 Butte about 6 air mi ne of Stirling City (about 1 1/2 mi se of Bald Mountain, on the n side of the County Road, sw of Keyser Creek) 1432 Comment
  CAS-BOT-BC71559  Pentagramma pallida Lowell Ahart 1970-2-16 s.n. Butte near Honcut 45 Comment
  RSA0087540  Pentagramma pallida Mrs. R. M. Austin 1883-05 8 Butte Iron Canyon. Comment
  CHSC10703  Pentagramma triangularis Lowell Ahart 1971-3-17 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC11326  Pentagramma triangularis Lowell Ahart 1968-3-11 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC29723  Pentagramma triangularis subsp. semipallida J. D. Jokerst 1980-4-17 587 Butte Top of North Table Mt, northern most edge. 472 Comment
  CHSC46035  Pentagramma triangularis subsp. semipallida Lowell Ahart 1978-4-19 1655 Butte Along the edge of the Feather Falls trail, about 4 miles north of Feather Falls. 548 Comment
  CHSC96815  Pentagramma triangularis subsp. semipallida Lowell Ahart 2007-5-22 13918 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, about 16 miles (air) northeast of Oroville. 844 Comment
  UC1549532  Pentagramma triangularis subsp. semipallida M. S. Taylor 1981-4-28 3568 B Butte ca. 2-3 mi ne of Pulga (along Four Trees Rd, ca. 0.5 to 1 mi e of Hwy 70); Pulga SW Quadrangle 670 Comment
  SEINET3166411  Pentagramma triangularis subsp. triangularis P. J. Alexander 2009-5-27 1049 Butte Western foothills of the northern Sierra Nevada, Feather Falls trail +-0.4 trail miles short of the overlook, 2.2 miles ESE of Bald Rock Dome, 17.8 miles NE of Orovoville, Plumas National Forest. 616 Comment
  UC1390029  Perideridia bolanderi subsp. involucrata T. I. Chuang and L. Constance 1967-6-21 6057 Butte on Hwy 70 5.7 mi se Pentz SStore Comment
  CHSC25263  Perideridia kelloggii M. S. Taylor 1977-6-27 1398 Butte On Butte College campus, ca. 15 mi s of Chico. 30 Comment
  CHSC102825  Perideridia oregana Lowell Ahart 2009-6-30 15957 Butte West of the Guardian Rock Trail, about 100 yards north 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
  CHSC37502  Perideridia oregana J. D. Jokerst; L. Ahart, M. S. Taylor 1983-1-17 1675 Butte Top of North Table Mt. ca 1/2 mile NW of Cherokee Rd at the east edge of mesa. 381 Comment
  CHSC48661  Persicaria amphibia Vernon Oswald 1987-7-4 3091 Butte Rancho Aquas Frias. 7-Mile Lane, 2.8 mi s of Dayton-Ord Hwy, between Chico and Butte City. Growing in a dry roadside ditch. 33 Comment
  CHSC23425  Persicaria lapathifolia K. R. Stern 1972-9-19 3781 Butte Margin of Perkins Lake, Llano Seco Rancho, ca. 10 mi sw of Chico. Comment
  CHSC42054  Persicaria lapathifolia Lowell Ahart 1986-11-9 5452 Butte On the bottom of a pond, about 1/10 mile sout of the clay burrow for Oroville Dam, 1/4 mile east of Larkin Road, about 6 miles south-west of Oroville. 36 Comment
  CHSC43246  Persicaria lapathifolia Lowell Ahart 1987-10-22 5922 Butte Along a drain ditch, along Oroville Chico Highway (149), 1/10 mile north-west of Highway 70. 76 Comment
  CHSC90818  Persicaria maculosa Lowell Ahart 2005-5-2 11782 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
  CHSC38297  Petrorhagia dubia Vernon Oswald 1983-3-14 184 Butte Upper Bidwell Park, Chico, on the north rim ca. 1500 ft w of the power lines. Along the edge of a jeep trail. 195 Comment
  HSC46448  Petrorhagia dubia J. P. Smith, J. O. Sawyer 1973-4-14 6064 Butte Rock Rd., 1 mi. W of Cohasset Rd. near Chico Comment
  UCSB63949  Petrorhagia dubia Snodgrass, G. 1981-4-11 Butte Ca. 5 mi. E of Chico; ca. 1/2 miles E of Rockwood Lake entrance on Humbug Rd. (now Honeyrun Rd.) Comment
  CHSC110127  Phacelia cicutaria var. cicutaria L. P. Janeway 2012-3-21 10797 Butte Northern Sierra Nevada Foothills. Near the top of a flattened knoll on east side of Thermalito Diversion Pool between the Pool and the railroad tracks, about 0.4 km north-northeast of the Diversion Dam (Feather River; Oroville). 88 Comment
  JEPS117223  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 Comment
  RSA88080  Phacelia corymbosa J. T. Howell 1951-6-26 27522 Butte Near Pulga. 366 Comment
  UC1299148  Phacelia egena Freed W. Hoffman 1951-3-19 3857 Butte lava cap bluff 16.3 mi from Chico (on road from Chico to Pentz) Comment
  SEINET10497006  Phacelia egena Lowell Ahart, James D. Jokerst 1985-3-24 Ahart 4857 Butte Serpentine Point, west of Yankee Hill. Comment
  CDA13727  Phacelia heterophylla subsp. virgata G. F. Hrusa, T. D. Wilfred 1997-6-27 13905 Butte Sierra Nevada; Feather Falls/Cascade Rd. to USFS 21N22Y, 1 km. E to summit. Comment
  RSA31961  Phacelia heterophylla subsp. virgata A. A. Heller 1938-5-28 15124 Butte Somewhat shaded places along the Feather River Hwy in moist soil, 25 miles from Oroville Comment
  UC671702  Phacelia heterophylla subsp. virgata Lincoln Constance 1941-5-28 2829 Butte Magalia Sierra Nevada foothills, South Branch of Feather River 518 Comment
  RSA133931  Phacelia imbricata subsp. imbricata L. R. Heckard, J. R. Sweeney 1953-4-27 342 Butte About half a mile below Las Plumas Road junction, along the Feather River highway. 183 Comment
  UC1228350  Phacelia mutabilis L. R. Heckard 1956-8-6 825 Butte along creek just w Jonesville; Butte Creek 1371 Comment
  UC426939  Phacelia mutabilis E. B. Copeland 1930-7-13 446 Butte Jonesville 1550 Comment
  CHSC34792  Phacelia procera M. S. Taylor; L. Ahart 1981-8-16 4207 Butte N side of 25N04, near upper Big Kinshew Creek, ca. 2 mi se of Philbrook Reservoir, ca. 6 mi ne of Stirling City. 1950 Comment
  UC426940  Phacelia procera E. B. Copeland 1930-7-11 447 Butte near Butte Creek; Jonesville 1550 Comment
  CHSC48474  Phacelia purpusii Vernon Oswald 1983-6-22 733 Butte Beside Calif. Hwy. 32 0.2 mi s-w of its jct. with Humboldt Rd. to Butte Meadows. 1158 Comment
  CHSC93963  Phacelia purpusii R. D. Fischer 2004-6-20 760 Butte Sierra Nevada Mountains, north-east corner of Butte County and ca. 2 miles west of Butte Meadows on Humboldt Road. Plants collected roadside off eroded, gravelly volcanic soil. 1371 Comment
  CHSC98664  Phacelia purpusii B. Castro; L. P. Janeway 2005-8-1 1506 Butte Ca 0.5 mi S of Paradise Lake, on slopes overlooking Little Butte Creek, W of Coutelenc Rd and E of Creek. On rocky NW-facing open serpentine slope. 768 Comment
  CAS-BOT-BC154303  Phacelia ramosissima var. ramosissima Charles Piper Smith 1914-7-2 2905 Butte Chico Creek Comment
  UCD88798  Phalaris caroliniana A. A. Heller 1914-4-17 11307 Butte 8 miles N of Oroville. Comment
  CHSC58290  Phalaris lemmonii Lowell Ahart 1992-5-23 6775 Butte Rice field, on the north side of Biggs Princeton Road, about 2 miles west of Biggs. 30 Comment
  CAS-BOT-BC250705  Phalaris paradoxa A. A. Heller 1919-8-13 13352 Butte Between Nelson and Richvale Comment
  CHSC58291  Phalaris paradoxa Lowell Ahart 1992-5-23 6776 Butte Rice field, on the north side of Biggs Princeton Road, about 2 miles west of Biggs. 30 Comment
  SEINET10716718  Phalaris paradoxa A. Arthur Heller 1914-5-13 Heller 11391 Butte Nelson Comment
  UC858334  Philadelphus lewisii Lewis S. Rose 1939-6-7 39237 Butte 3 mi s Pulga; N. Fork of Feather River 609 Comment
  SEINET10482892  Philadelphus lewisii subsp. californicus Mary Susan Taylor 1976-5-5 Taylor 1113 Butte Abundant along creek, ca. 5 ft S of Hwy 70, ca. 20 mi NE of Oroville; granitic soils. Comment
  SEINET12217140  Philadelphus lewisii subsp. californicus Unknown 1984-1 4659 Butte along Ponderosa Way, ca 0.12 mi W of Ponderosa Dam, ca 2 mi NW of Forbestown 370 Comment
  CHSC64261  Phleum pratense S. C. Morey 1983-7-28 630 Butte Chico Meadows. On e side of Scout Rd., ca. 1 mi n of its jct with Humboldt Rd. at Butte Meadows. 1292 Comment
  UCR115104  Phleum pratense G. Fred Hrusa, T. D. Wilfred 1996-7-9 13147 Butte Sierra Nevada Mtns., Plumas National Forest. Above Jordan Creek, south of Hwy 162 near Roger's Cow Camp 1250 Comment
  UC478477  Phlox gracilis E. B. Copeland 1931-6-29 680 Butte Butte Creek Jonesville 1500 Comment
  JEPS114181  Phlox speciosa subsp. occidentalis L. P. Janeway 2007-5-6 8969 Butte Northern High Sierra Nevada. Ridge top along a side road north off the road from Sawmill Peak to Flea Valley, 1.8 air km northeast of Sawmill Peak. Comment
  CAS-BOT-BC134915  Phoradendron bolleanum John Thomas Howell 1955-6-14 30443 Butte Magalia. Sierra Nevada 731 Comment
  CAS-BOT-BC135098  Phoradendron juniperinum E. B. Copeland 1931-7-28 627 Butte Jonesville 1500 Comment
  CAS-BOT-BC141118  Phoradendron serotinum subsp. macrophyllum G. P. Rixford 1914-10-1 s.n. Butte Bidwell Park, Chico Comment
  CHSC77496  Phoradendron villosum Tim Stofer 1997-4-12 8 Butte Located on the east side of trail 100 yrds from the shooting range of the South Rim Trail off South Park Dr. in upper Bidwell Park. 76 Comment
  UC1586516  Phyla nodiflora var. nodiflora Lowell Ahart 1991-9-14 6725 Butte about 2 mi e Honcut (Joie Osgood Ranch) 45 Comment
  UC1594711  Phyla nodiflora var. nodiflora Lowell Ahart 1992-7-23 6832 Butte about 1 1/4 mi nw Oroville Dam (bottom of Oregon Gulch, n of the Thermalito Diversion Pool, Lake Oroville Recreation Area); Lake Oroville Recration Area, Oregon Gulch 91 Comment
  CHSC1997  Phyla nodiflora var. rosea V. Holt 1935-9-1 Butte Dodge Lands. 30 Comment
  SBBG121212  Physalis lancifolia L. Ahart 2007-8-19 14494 Butte N strand of a reservoir, ca. 2.25 mi (air) SE of Honcut ca. 13 mi (air) SE of Oroville 49 Comment
  CHSC100904  Physocarpus capitatus R. A. Schlising; R. Banchero 1981-5-16 4090 Butte Along Vilas Road, 2.2 miles east of its junction with Cohasset Road, in the village of Cohasset at the West Branch of Mud Creek.. 743 Comment
  CHSC32124  Pickeringia montana L. Ahart 1979-5-29 1909 Butte Along edge of dirt rd ca. 0.5 mi e of Kunkle Creek, 2.5 mi ne of Paradise. 500 Comment
  CHSC41469  Pinus contorta Lowell Ahart 1986-5-20 5275 Butte West of the road on the west side of the Sly Creek Reservoir, about 1 mile north of the Sly Creek Dam. 1097 Comment
  NY61577  Pinus jeffreyi E. B. Copeland 1929-7-19 333 Butte This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  CAS-BOT-BC78937  Pinus monticola Dr. E. B. Copeland 1929-7-17 331 Butte Above Jonesville 2000 Comment
  SEINET11739304  Pinus ponderosa Unknown 1982-1 2 Butte 0.5 km N of Magalia, 150 m. E of Skyway, 50 m W of Coultonlenic Rd 700 Comment
  CHSC39520  Piperia elongata Lowell Ahart 1983-6-12 4051 Butte About 1 mile south of Crystal hill, near Oregon Gulch, near Lake Oroville, about 7 miles south-west of Feather Falls. 425 Comment
  JEPS105663  Piperia elongata L. P. Janeway, Christine Hantelman 2003-6-19 7852 Butte Northern Sierra Nevada Foothills. Along south edge of Middle Fork Feather River arm of Lake Oroville, half way between mouth of South Fork Feather River arm of the lake and mouth of Bean Creek 277 Comment
  UC1586560  Piperia elongata Lowell Ahart 1991-5-31 6657 Butte sw of Oroville Dam (along the Dan Beebe Trail, between Canyon Drive and Oroville Dam Blvd East); Lake Oroville Recreation Area 213 Comment
  CHSC88246  Piperia transversa Lowell Ahart 2004-7-11 11246 Butte Along the dirt road, on the southeast edge of Paradise Lake, about 3/4 mile northeast of the picnic area, about 1 mile northeast of Paradise Dam, about 4 miles (air) southwest of Stirling City. 814 Comment
  CHSC43586  Pistacia atlantica Vernon Oswald 1987-4-29 2358 Butte Chico Tree improvement Center (former USDA Plant Introduction Station ) in se Chico. 68 Comment
  CHSC106230  Pistacia chinensis L. P. Janeway; B. Castro 2010-5-23 9977 Butte Cascade Range Foothills. Upper Bidwell Park, Chico; northwest side of Big Chico Creek, along Yahi Trail about 200 m southwest of the power lines; on terrace between uplands and the creek. 91 Comment
  CHSC109060  Pistacia chinensis Lowell Ahart; Linnea Hanson, Kaline Le Coq, Josephine Guardino 2012-4-27 17903 Butte On the north side of Big Chico Creek, south of the path, near the sign, southwest of the intersection of Vallombrosa Avenue and Manzanita Avenue, Lower Bidwell Park, Chico. 80 Comment
  SEINET10932923  Pityrogramma triangularis Mary Susan Taylor 1980-3-1 Taylor 2339 Butte T21N R2E se sec 11. Among rocky outcrops on n-facing bluffs overlooking Nance Canyon, ca. 1/4 mi N of Neal Road, ca. 3 mi E of its jct with Hwy 99, ca. 7 mi S of Chico. 122 Comment
  CHSC114949  Plagiobothrys Lowell Ahart 2015-3-10 19944 Butte 60 feet north of the fence, north of the parking area, north of Larkin Road, about 6 miles (air) southwest of Oroville. 44 Comment
  CAS-BOT-BC169827  Plagiobothrys Ira L. Wiggins 1411 Butte 3 1/2 mi E of Durham on Slate Land Colony Highway Comment
  POM287608  Plagiobothrys Lyman Benson 1935-3-27 6365 Butte 5 miles NW of Oroville, Sierra Nevada Mt Range, Sacramento river watershed. 152 Comment
  CHSC26781  Plagiobothrys austiniae M. S. Taylor; M. Hayes 1978-4-14 1569 Butte In vernal pools on e side of Williams Rd, ca. 1/4 mi n of Pentz Rd, on Butte College Campus. 30 Comment
  CHSC34718  Plagiobothrys austiniae M. S. Taylor 1980-3-1 2338 Butte On north facing bluffs looking into Nance Canyon, ca. 1/4 mi n of Neal Rd, ca. 3 mi e of its jct with Hwy 99, ca. 7 mi s of Chico. 121 Comment
  CHSC90979  Plagiobothrys austiniae Lowell Ahart 2005-5-11 11809 Butte Margins of vernal pools, about 300 yards southwest of the poor dirt road off of Cherokee Road, south part of North Table Mountain, about 7 miles (air) north of Oroville. 359 Comment
  POM196508  Plagiobothrys canescens A. A. Heller 1926-4-21 13935 Butte Along Rock Creek, 7 mi. north of Chico 91 Comment
  CHSC35325  Plagiobothrys fulvus var. campestris M. S. Taylor; K. Tharp 1982-4-8 4281 Butte SE corner of jct of Hys 149 and 99, ca. 10 mi s of Chico. 68 Comment
  JEPS127011  Plagiobothrys glyptocarpus Lowell Ahart 2016-5-24 20857 Butte About 150 yards south of La Porte Road, about 1/4 mile southwest of the intersection of La Porte Road and Loma Rica Road, about 3 1/4 miles (air) northeast of Honcut. Comment
  UCD18741  Plagiobothrys glyptocarpus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-10 34 Butte one mi. east of Rock River Mine and parking area, off Cherokee Rd., North Table Mountain, Oroville site. Comment
  UC1442671  Plagiobothrys glyptocarpus var. modestus Lowell Ahart 1978-4-27 Butte Peter Ahart Ranch Honcut 50 Comment
  CHSC35054  Plagiobothrys leptocladus R. Schlising; R. Banchero 1981-4-20 4054 Butte NW of Oroville along Cottonwood Road, ca. 0.4 mile E of jct with Hwy 99. Roadside vernal pools. 41 Comment
  SEINET3449095  Plagiobothrys shastensis Unknown 2003-5-9 10124 Butte Oroville, Oroville, about 5 air miles southwest, about 1.25 miles south of the Oroville Airport, about 200 yards west of Larkin Road, about 50 yards north of the access road to the boat ramp at the Thermalito Afterbay 30 Comment
  CHSC103703  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2010-5-14 16653 Butte On the west side of old Humboldt Road, Disc Golf Area, about 150 yards north of the entrance to the Disc Golf Area, about 40 yards west of Higway 32, Upper Bidwell Park, about 5 miles (air) northeast of Chico. 395 Comment
  HSC100801  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2010-6-9 16786 Butte ~100 yd. W of the fence, ~1/2 mi. S of the improved parking area and Cherokee Rd., N Table Mountain, 5 1/2 (air) mi. NE of Oroville. 399 Comment
  JEPS117190  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
  RSA768983  Plagiobothrys stipitatus var. micranthus L. Ahart 2010-5-14 16653 Butte West side of the old Humboldt Road, Disc Golf Area, about 150 yards north of the entrance to the Disc Golf Area, about 40 yards west of Highway 32, Upper Bidwell Park, about 5 air miles northeast of Chico 396 Comment
  CHSC33687  Plagiobothrys tenellus L. Ahart 1981-3-29 2710 Butte Along edge of Ponderosa Way near the Ponderosa Dam, near Forbestown. 350 Comment
  CHSC39622  Plantago bigelovii Lowell Ahart 1983-4-10 3919 Butte South of a large wash, 1/10 mile east of the large barn, about 1 1/4 miles north-east of Hwy 99 and Pentz Road. 65 Comment
  RSA716326  Plantago coronopus L. P. Janeway 2005-5-9 8385 Butte Northern Sierra Nevada Foothills. Northwest side of Hwy 70, 0.6 km SW of Pentz Rd. 207 Comment
  CHSC37404  Plantago elongata A. R. Ratcliff; R. A. Schlising 1980-4-6 3547 Butte Jct Chico-Oroville Road, about 5 mi s of Chico. 53 Comment
  JEPS107357  Plantago elongata Lowell Ahart, Paul Maslin, John Dittes 2005-3-17 11663 Butte Big Chico Creek Ecological Reserve. Burned area, ca. 50 yd S of fence, on the E side of the poor dirt road, ca. 1/8 mi NW of the Indian Cave, ca. 3/4 mi W of Big Chico Creek, ca. 4 1/2 mi (air) NE of Chico 481 Comment
  CHSC109132  Plantago erecta Lowell Ahart 2012-3-23 17778 Butte In a small meadow opening in brush, about 100 yards south of the intersection of Guardian Trail and Ten Miles House Road, about 1/4 mile west of Highway 32, about 9 miles (air) northeast of Chico. 437 Comment
  CHSC12640  Plantago erecta M. S. Taylor 1974-4-20 183 Butte Richardson Springs, ca. 6 mi n of Chico, ca. 10 yds off side of road. Comment
  CHSC33897  Plantago erecta M. S. Taylor 1981-4-21 3549 Butte S side of Concow Rd, on ridge, ca. 0.5 mi s of its jct with Ponderosa Way (Rim Rd), ca 2 mi n of Lake Concow, ca. 20 air mi n of Oroville. 853 Comment
  CHSC38584  Plantago major Vernon Oswald 1983-6-14 684 Butte Upper Bidwell Park, Chico, near Yahi Trail e of Brown's Hole. Growing on edge of Chico Creek. 201 Comment
  CHSC76003  Plantago major Lowell Ahart; Vernon H. Oswald 1999-8-13 8173 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
  JEPS95936  Plantago major Lowell Ahart 1999-8-13 8173 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
  JEPS98554  Plantago virginica Lowell Ahart 2000-5-17 8366 Butte 7 1/4 air mi W of Oroville (SE margin Thermalito Afterbay, W of poor dirt road, S of the Cottonwood tree, about 1/8 mi N of the Richvale Hwy, about 3/4 mi E of Hwy 99) 42 Comment
  CAS-BOT-BC93158  Platanus racemosa A. A. Heller 1914-3-12 11192 Butte Canon [Canyon] of Big Chico Creek east of Chico. 68 Comment
  CHSC6608  Platycladus orientalis M. MacArthur 1968-6-16 318 Butte On the Aymer Jay Hamilton School play field along the Esplanade, Chico State College campus. 60 Comment
  UC118461  Platystemon californicus Mrs. R. M. Austin Apr 1896 170 Butte plains e Chico; plains e of Chico Comment
  UCD80810  Plectritis ciliosa CNPS SN Foothill Team 2005-3-22 SNFN 0063 c Butte CDPR, Oroville State Recreation Area, just south of a state park utility road out to water tanks; this road heads southwest from Highway 162, just N of junction with Forbestown Road. 329 Comment
  SEINET12328347  Plectritis ciliosa Unknown 1984-1 4538 Butte along North Honcut Creek, ca 1 mi N & 2.7 mi E of Honcut on Peter Ahart Ranch 50 Comment
  CHSC38754  Plectritis macrocera Vernon Oswald 1983-3-5 115 Butte Upper Bidwell Park, on the north rim at a level w of Horseshoe Lake. 128 Comment
  SEINET3450767  Poa annua Unknown 2003-3-31 10031 Butte Oroville, Oroville, about 10 miles southwest, about 3/8 miles east of Riceton highway, about 20 yards north of Hamilton Road, about 50 yards east of the drain ditch, landplained rice field 20 Comment
  CHSC88148  Poa bolanderi Lowell Ahart 2004-7-23 11305 Butte On the east side of the road, north of the West Branch Campground, south of the Bridge across the West Branch of the Feather River, about 1 1/2 miles (air) west of Philbrook Reservoir Dam, about 3 3/4 miles (air) southeast of Butte Meadows. 1456 Comment
  JEPS121979  Poa bolanderi Lowell Ahart 2014-7-10 19628 Butte About 100 yards south of Philbrook Road, about 1 mile (air) west of Philbrook Reservoir. Comment
  CHSC101297  Poa bulbosa Lowell Ahart 2009-4-22 15598 Butte South side of Guardians Trail, about 50 yards west of Pine Trail, Upper Bidwell Park, west of the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 381 Comment
  JEPS87146  Poa cusickii subsp. epilis Lowell Ahart 1992-7-26 6862 Butte ca 2 air mi se Snow Mt (ca 1/4 mi ne of Carr Mine) 1798 Comment
  JEPS116022  Poa palustris Lowell Ahart 2009-6-3 15815 Butte About 100 yards west of the table at the hold 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
  RSA700237  Poa pratensis L. Ahart 2004-7-23 11304 Butte on the east side of the road, north of the West Branch Campground, south of the Bridge across the West Branch of the Feather River, bout 1.5 miles (air) west of Philbrook Reservoir Dam., About 3 3/4 miles (air) southeast of Butte meadows. 1457 Comment
  SEINET10659346  Poa scabrella Prouty 1980-4-17 PROUTY 80 .99 Butte Oak-Foothill Woodland off of Yankee Hill Rd. T21N, R4E, Sec 4, SE 1/4. 518 Comment
  SEINET7852326  Poa secunda subsp. juncifolia J. Nachlinger 1984-4-8 911 Butte Table Mouintain, 4 miles north of Oroville 366 Comment
  CAS-BOT-BC236374  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True 1967-5-9 42233 Butte SE side of N Fork of Feather River at Pulga Bridge Comment
  CHSC32590  Poa secunda subsp. secunda J. D. Jokerst; Jeri Donovan 1981-3-21 1258 Butte Ca 0.5 mi N of Horseshoe Lake (Upper Bidwell Park), Chico. where the foothills begin the initial rise. Comment
  CHSC8601  Poa secunda subsp. secunda M. Banning 1969-4-18 78 Butte Table Mt., 1/2 mi. from Ore. City junction, then approx. 1/4 mi. NW. 487 Comment
  CHSC48493  Pogogyne douglasii Vernon Oswald 1986-4-28 1983 Butte Hamilton-Nord-Cana Hwy 0.5 mi n of Bennett Rd. 48 Comment
  UC196319  Pogogyne douglasii A. A. Heller 1914-5-13 11390 Butte Comment
  CHSC42197  Pogogyne zizyphoroides John E. Hunter 1986-4-12 52 Butte Ca 1 km e of Chico, 50 m s of Hwy 32. 75 Comment
  CHSC52215  Pogogyne zizyphoroides Linda Osborn 1980-4-22 18 Butte Ca 6 mi n jct of Esplanade on Hwy 99, 250 yds w. Comment
  CHSC42738  Polycarpon tetraphyllum Lowell Ahart 1987-4-30 5485 Butte 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
  CHSC49836  Polycarpon tetraphyllum Vernon H. Oswald 1990-4-2 4142 Butte Bedrock Park on the e side of the Feather River in Oroville. Margin of a slough. 42 Comment
  CHSC95086  Polygala cornuta var. cornuta L. P. Janeway 2006-6-25 8698 Butte Northern High Sierra Nevada. Along a major dirt road 2.6 km south of Stirling City towards West Branch Feather River crossing. 1006 Comment
  RSA76964  Polygala cornuta var. cornuta F. W. Peirson 1926-6-21 6764 Butte About 10 miles east of Chico on Humboldt Road. Comment
  SEINET6647278 Image available Polygonum alpinum H. F. Copeland 1928-1 440 Butte neighborhood of Jonesville; Canyon of Jones Creek 1829 Comment
  CAS-BOT-BC109135  Polygonum bidwelliae Lowell Ahart 1980-5-11 2239 Butte 0.5 mile southwest of Kunkle Res. 500 Comment
  CAS-BOT-BC109141  Polygonum bidwelliae James L. Reveal 1988-6-3 6999 Butte Crown Point Road, 0.8 mile northeast of California Highway 32 between Ten Mile Trail and Fourteen Mile House Road. 609 Comment
  CHSC45459  Polygonum bidwelliae Lowell Ahart 1979-5-29 1896 Butte East of Kunkle Creek, about 1/8 mile north-east of Kunkle Reservoir, about 2 1/2 miles south-east of Paradise. 457 Comment
  LA207131  Polygonum bidwelliae A. A. Heller; 1927-5-18 14391 Butte volcanic outcrops along Neale grade on road from Chico to Paradise Comment
  POM220117  Polygonum bistortoides H. F. Copeland 1928-8-21 432 Butte Near head of Willow Creek, Neighborhood of Jonesville. 1524 Comment
  CHSC45857  Polygonum californicum Lowell Ahart 1974-10-18 663 Butte Along the edges of a small wash, Peter Ahart Ranch, about 1 1/2 miles north and 1 1/4 miles east of Honcut, about 12 miles south of Oroville. Comment
  UC127747  Polygonum convolvulus Miss Kate Conger 1907-1 Butte Brush Creek Comment
  UC204385  Polygonum davisiae A. A. Heller 1914-8-7 11661 Butte summit back of Jonesville (n. slope just below crest of ridge) Comment
  JEPS117421  Polygonum douglasii subsp. douglasii Lowell Ahart 2010-9-28 17250 Butte On damp soil, about 10 yards west of Big Kimshew Creek, under trees, 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 Philbrood Reservoir 1886 Comment
  CHSC39082  Polygonum douglasii subsp. spergulariiforme R. A. Schlising 1979-9-6 3486 Butte Above Butte Meadows, along Humboldt Road, 1.5 mi S of Lassen National Forest and 1.1 mi N of road to Stirling City; in ditches at roadside. Comment
  UC1562376  Polygonum hydropiper Lowell Ahart 1990-5-25 6493 Butte about 1/8 mi nw Enterprise Bridge across lake (e of Enterprise Boat Launch Area, below high water line of lake); Lake Oroville 259 Comment
  UC1586532  Polygonum hydropiperoides Lowell Ahart 1991-9-14 6715 Butte about 2 mi e Honcut (on sides of large reservoir); Joie Osgood Ranch 45 Comment
  JEPS118058  Polygonum lapathifolium Lowell Ahart 2011-8-17 17628 Butte Aboout 10 yards north of the trail, north of the crossing and on the east side of Big Chico Creek, about 50 yards west of Ten Mile House Road, Upper Bidwell Prk, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 203 Comment
  UC1563298  Polygonum lapathifolium unknown 1990-10-3 6613 Butte about 1/8 mi ne Canyon Creek Bridge across lake (below high water line of lake, n side of creek); Lake Oroville, East Fork of Canyon Creek 243 Comment
  CHSC100914  Polygonum minimum R. A. Schlising; Lawrence Janeway 1988-7-22 4624 Butte North of Philbrook Lake, near Plumas County line. 1935 Comment
  CHSC58946  Polygonum minimum Lowell Ahart 1992-7-29 6874 Butte On rocky slopes, about 1 mile northeast of the Carr Mine, about 3/4 mile northwest of Lotts Lake. 1798 Comment
  SD1173  Polygonum minimum E. B. Copeland 1931-7-18 631 Butte Jonesville, on shaded gravel bars by Butte Creek 1500 Comment
  UC1101126  Polygonum persicaria Herbert L. Mason and Verne Grant 1946-9-4 13111 Butte West Gridley Rd 833 Canal Comment
  SEINET10479670  Polygonum phytolaccifolium Mary Susan Taylor, Lowell Ahart 1981-8-16 Taylor 4208 Butte T25N R5E ne 1/4 sw 1/4 sec 21. Jones- ville SW quad. N side of 25N04, near upper Big Kimshew Creek, ca. 2 mi SE of Philbrook Reservoir, ca. 6 mi NE of Stirling City. Red Fir Forest. 6400 ft. 1950 Comment
  UCR263557  Polygonum punctatum Vernon H. Oswald, Lowell Ahart 1996-7-22 8077 Butte Sacramento Valley, Sacramento National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Common among tules on the edge of the farm road crossing a branch of Angel Slough W of Refuge Headquarters at the SE corner of Tract 1, Sanctuary I 32 Comment
  SEINET10479674  Polygonum punctatum Lowell Ahart 1990-10-3 Ahart 6620 Butte On the bottom of the East Fork of Canyon Creek, below the high water line of Lake Oroville, about 1/4 mile north-east of the Canyon Creek Bridge across Lake Oroville. Foothill Woodland (destroyed). T20N R5E SW/S16. 259 Comment
  CAS-BOT-BC71874  Polypodium californicum A. A. Heller 1919-3-29 13090 Butte Feather River near Yankee Hill Comment
  CHSC32692  Polypodium calirhiza M. S. Taylor 1981-3-24 3433 Butte S side of Hwy 70 opposite Cresta Powerhouse, ca. 2.4 mi e of Pulga. 487 Comment
  CHSC39843  Polypodium calirhiza Maxey-Jones 1928-3-5 Butte Iron Canyon. Comment
  SEINET10899871  Polypodium glycyrrhiza Mary Susan Taylor 1983-1-17 Taylor 5215 Butte T20N R4E ne sec 6. Vicinity of mouth of Flag Canyon. On top of North Table Mt., ca. 8 mi n of Oroville. Elevation ca. 1225 ft. 373 Comment
  CAS-BOT-BC233053  Polypogon interruptus Lowell Ahart 1987-5-27 5699 Butte On sand bar along the N Fork of the Feather River, near the Poe Power House, about 2 miles SE of Jarbo Gap 271 Comment
  CAS-BOT-BC233056  Polypogon interruptus Lowell Ahart 1980-7-29 2515 Butte Along lower Forbestown Road 750 Comment
  SEINET10602421  Polypogon interruptus A. Arthur Heller 1913-6-4 Heller 10775 Butte Table Mountain Olive Ranch north of Oroville. 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
  CHSC39521  Polypogon maritimus Lowell Ahart 1983-6-12 4052 Butte Along the edge of the road, about 1 mile south of Crystal Hill, near Oregon Gulch, near Lake Oroville, about 7 miles south-west of Feather Falls. 425 Comment
  CHSC2178  Polypogon monspeliensis H. Silberman; D. Isaac 1949-5-17 Butte Drainage of Golf course reservoir, Chico. 91 Comment
  CHSC4338  Polypogon monspeliensis J. Francis 1966-5-18 Butte On perimeter of pond n of golf course, Bidwell Park, Chico. Comment
  UCD91374  Polypogon monspeliensis R. N. Raynor; H. A. Hannesson 1941-5-9 s.n. Butte 10 miles S of Oroville on Marysville Road. Comment
  SEINET11688355  Polypogon monspeliensis Unknown 1985-1 4973 Butte W of Lunt Road ca 0.5 mi N of intersection of Lunt Rd and Hwy 70, N of Yankee Hill, N of Oroville 503 Comment
  UCD136477  Polystichum californicum G. F. Hrusa 1997-5-29 13794 Butte Sierra Nevada, Plumas National Forest. Immediately above Sucker Creek, 1.5 miles SSE of Feather Falls. 720 Comment
  SEINET10867041  Polystichum munitum subsp. nudatum Mary Susan Taylor 1979-3-20 Taylor 1941 Butte T21N R4E nw1/4 sec. 21. Cherokee Quad. Along old road on N side of Hwy 70 following West Branch of the Feather River, which begins at S side of bridge over N fork of Feather River, ca. 10 mi N of Oroville; limestone outcrops within Foothill Woodland. 305 Comment
  SEINET10530133  Polystichum scopulinum Mary Susan Taylor 1980-8-2 Taylor 3214 Butte T27N R5E center sec 32, Jonesville quad. Humboldt Peak, N tip of the county. 2155 Comment
  CHSC13515  Populus fremontii J. Lee 1974-4-4 4 Butte Found at 484 Panama Ave., Chico. 76 Comment
  SEINET10460849  Porterella carnosula Edwin B. Copel 1930-7-28 Copeland 1314 Butte Near head of Willow Creek Comment
  CHSC28613  Portulaca oleracea R. A. Schlising 1979-10-23 3491 -1 Butte SW of Chico and E of Orbend, at west margin of Butte County, at Sacramento River and Ord Ferry Road. Comment
  SEINET10965500  Portulaca oleracea Mary Susan Taylor 1977-10-10 Taylor 1506 Butte In dried up weed field on N side of Crauch Road, at its junction with Lone Pine Road, ca. 4 mi S of Chico. 46 Comment
  CHSC28622  Potamogeton crispus M. S. Taylor 1979-10-2 2216 Butte On e bank of Sacramento River at Chico Landing, ca. 5 mi w of Chico. 30 Comment
  UC1562436  Potamogeton foliosus Lowell Ahart 1990-7-1 6533 Butte on e side of Forbestown Reservoir (on e side of the road, at the Forbestown Generator) 487 Comment
  CHSC65473  Potamogeton foliosus var. foliosus Vernon Oswald 1987-4-30 2360 Butte Butte Creek Reserve on the s side of Butte Creek, ne of the Skyway. In a dredger pond. 80 Comment
  UC1100068  Potamogeton nodosus Verne Grant and Herbert L. Mason 1946-8-7 12990 Butte Gridley Road n of Butte Sink Comment
  UCD138255  Potamogeton nodosus H. L. Mason; Verne Grant 1945-7-10 12640 Butte Stanford Slough, Butte Sink, southwest corner of county. Comment
  SEINET4536410 Image available Potamogeton pusillus var. tenuissimus E. B. Copeland 1931-1 604 Butte Jonesville 1650 Comment
  UC1564800  Potentilla drummondii V. Oswald and L. Ahart 1989-7-12 3855 Butte ca 2 air mi sw Lotts Lake (ca 3 air mi se of Philbrook Reservoir); meadow near headwaters of Big Kimshew Creek 1901 Comment
  UC481573  Potentilla gracilis var. fastigiata H. F. Copeland 1931-6-11 Butte Jonesville Butte Creek Meadows, Jonesville 1828 Comment
  CHSC46458  Potentilla millefolia V. Oswald; L. Ahart 1989-6-27 3826 Butte Humbug Rd at Butte Creek House, ca. 3.3 mi (air) se of Jonesville. Meadow along Butte Creek. 1767 Comment
  CHSC2416  Prunella vulgaris var. lanceolata R. Carter 1965-6-20 243 Butte Found 4 mi. E of intersection of Lumpkin Rd. and Forbestown Rd. on Forbestown Rd. growing in moist meadow 25' N of road; ca. 14 mi. E of Oroville. 609 Comment
  CHSC52060  Prunella vulgaris var. lanceolata B. Castro; L. P. Janeway, R. A. Schlising 1988-7-11 270 A Butte On edge of Big Kimshew Ck in Crane Valley. 1569 Comment
  CHSC52061  Prunella vulgaris var. lanceolata B. Castro; L. P. Janeway, R. A. Schlising 1988-7-30 284 Butte By side of road on sw-facing slope above Coon Hollow. 1859 Comment
  CHSC52217  Prunella vulgaris var. lanceolata L. P. Janeway 1987-6-5 2154 Butte Upper reach of Carey Gulch where F. S. Rd 22N89 crosses it 0.5 mi from the OroQuincy Hwy. 1097 Comment
  CHSC37707  Prunus avium M. S. Taylor 1981-5-29 3813 Butte At old cabin site (persisting) on Chino Ridge, at end of spur rd 22N85, off 22N31, at Chico Creek, ca. 3 air mi sw of Coyote Gap, ca. 16 air mi n of Oroville. 975 Comment
  CAS-BOT-BC159919  Prunus emarginata H. F. Copeland 1929-6-10 1200 Butte Jonesville 1524 Comment
  CHSC44886  Pseudobahia heermannii Lowell Ahart 1979-4-15 1078 Butte Along the north side of Swedes Flat Road, near the bridge across Rocky Honcut Creek, about 6 miles north of Bangor. 457 Comment
  UCD134978  Pseudobahia heermannii M. S. Taylor 1980-4-1 2423 Butte overlooking Butte Creek, in Foothill Savannah around 1/4 mile downstream from Honey Run Covered Bridge, around 6 miles east of Chico. 182 Comment
  CHSC88073  Pseudognaphalium californicum R. D. Fischer 2004-6-6 159 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition along Hwy. 32. Located just within park property at the 10 Mile House Road parking area off Hwy 32, on ridge top. 464 Comment
  JEPS108883  Pseudognaphalium luteoalbum Lowell Ahart 2005-12-11 12511 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
  JEPS120611  Pseudognaphalium luteoalbum Lowell Ahart 2013-11-13 19229 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
  CHSC65445  Pseudognaphalium thermale Vernon Oswald 1987-7-29 3156 Butte Hwy 32, 1.5 mi ssw of Lomo. Roadside. 1146 Comment
  CHSC64084  Pseudostellaria jamesiana B. Castro; R. A. Schlising, L. P. Janeway 1988-7-23 277 Butte Nr Scotts John Ck 2.7 mi N of the Butte Ck Rd. Edge of Ck. 1920 Comment
  CHSC90580  Psilocarphus brevissimus var. brevissimus J. D. Prouty 1980-4-28 80 .94 Butte Roadside along Cherokee Road about 1.5 mi south of junction with Hwy 70, 0.5 mi north of Cherokee. 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
  CHSC108995  Psilocarphus oregonus Lowell Ahart 2012-4-30 17939 Butte On both sides of Guardian Trail, south of Ten Mile House Road, about 1/8 mile west of Highway 32, about 8 1/2 miles northeast of Chico, south part of Upper Bidwell Park. 401 Comment
  CHSC28147  Psilocarphus oregonus Robert A. Schlising; Ellen Sanders 1979-4-29 3378 Butte Richvale vernal pools, 1/4 mi n of jct Hwy 99 and Hwy 162 to Oroville; across from Thermalito Afterbay. Only in pools close to Hwy 99. Comment
  SEINET7042710  Psilocarphus oregonus A. G. Vestal 1963-5-9 s.n. Butte Ca. 14.2 miles southeast of Chico. Nelson quadrangle UTM Zone 10, 606440mE, 4378330mN. Comment
  SD5471  Psilocarphus tenellus E. B. Copeland 1931-7-20 Butte Jonesville 1700 Comment
  CHSC82439  Psilocarphus tenellus var. tenellus Lowell Ahart 2002-5-7 9611 Butte High banks of a pond, at the beginning of a southeast 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
  CHSC90801  Psilocarphus tenellus var. tenellus Lowell Ahart 2005-5-2 11774 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
  POM278389  Ptelea angustifolia R. M. Austin s.n. Butte Richardson's Springs. Sierra Nevada Mtn Range. Feather River. Comment
  CHSC29096  Pteridium aquilinum var. pubescens M. S. Taylor; J. D. Jokerst 1980-4-27 2549 Butte Ca. 1 mi s of Nimshew, ca. 1/4 mi e of Nimshew Rd. 609 Comment
  JEPS110226  Pteridium aquilinum var. pubescens Lowell Ahart 2006-4-28 12545 Butte South of the dirt road and south of a small stream, a part of the drainage into Beatson Hollow, about 3/4 mile northwest of the Iron Gate along Cherokee Road, North Table Mountain, about 7 miles (air) north of Oroville 318 Comment
  UC455450  Pterospora andromedea Miss Kate Conger 1907-1 Butte Brush Creek Comment
  CHSC101310  Pterostegia drymarioides Lowell Ahart 2009-4-22 15588 Butte West of the Guardians Trail, along the small drainage, just 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
  CHSC29709  Pterostegia drymarioides J. D. Jokerst 1980-4-21 626 Butte Top of North Table Mt., N of Cherokee Rd. Comment
  CHSC90241  Pterostegia drymarioides Michael J. McNairn 1989-4-22 17 Butte At the base of rocks along Yahi trail above Salmon Hole. Bidwell Park. Ca. 3 mi. e of 5-mile swimming area, ne Chico. 106 Comment
  CHSC20726  Pycnanthemum californicum M. S. Taylor 1975-8-31 888 Butte On Ernies Island in Butte Creek, ca. 50 ft s of Humboldt Rd, ca. 1/2 mi e of Butte Meadows. 1341 Comment
  CHSC44422  Pyrola aphylla Lowell Ahart 1988-6-15 6043 Butte North-west of the intersection of Black Bart Road and Forbestown Road, about 1 mile west of Robinson Mill Road. 670 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
  UC105955  Pyrola asarifolia Mrs. R. M. Austin Jul 1896 586 Butte Colby Comment
  CAS-BOT-BC462849  Pyrola asarifolia E. B. Copeland 1931-7-1 670 Butte Jonesville 1500 Comment
  UCR231087  Pyrola dentata Anna M. Hurlbutt 2009-8-7 019 Butte Northern Sierra Nevada Mtns., vicinity of Inskip Inn, end of paved part of Skyway Rd., north of Paradise 1463 Comment
  RSA0080633  Pyrola dentata H. F. Copeland 1928-8-18 1018 Butte Neighborhood of Jonesville. 1524 Comment
  CDA13242  Pyrola picta G. F. Hrusa, T. D. Wilfred 1996-7-8 13089 Butte Plumas National Forest; Near Old Railroad Grade Rd., Paradise Lake Dam, approx. 3 m. N of Magalia. Comment
  CHSC110978  Pyrus kawakamii Lowell Ahart; Susan Bazell, Josephine Guardino, Wes Dempsey 2012-6-28 18230 Butte On the north side of Sycamore Pool, Lower Bidwell Park, Chico. 61 Comment
  UCD47663  Quercus M. Wiesendanger 1928-6-1 1337 Butte Introduction Station, Chico. Comment
  CAS-BOT-BC94695  Quercus X howellii John Thomas Howell 1955-6-15 30494 Butte 6 miles from Paradise on road to Pentz 426 Comment
  CHSC96645  Quercus X morehus Lowell Ahart 2007-3-28 13599 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
  CAS-BOT-BC62690  Quercus chrysolepis A. A. Heller 1918-5-5 13016 Butte Honey Run grade on a north slope Comment
  CDA22088  Quercus garryana var. breweri J. T. Howell 1955-6-15 30497 Butte 6 miles from Paradise on road to Pentz. Comment
  CHSC28520  Quercus garryana var. breweri M. S. Taylor; J. D. Jokerst 1979-10-13 2246 Butte At Jordan Hill Rd (Ponderosa Way on some maps) bridge over creek, ca. .8 mi n of its jct with Concow Rd, ca. 5 mi e of Paradise. 426 Comment
  CHSC52340  Quercus garryana var. semota L. P. Janeway 1989-5-19 3268 Butte Serpentine outcrop and open area near upper SE'ern branches of Rattlesnake Cr, ca. 2.3 mi from bridge over W Br Feather River via rd to Sawmill Pk. 807 Comment
  UCR231085  Quercus kelloggii Anna M. Hurlbutt 2009-8-12 015 Butte Northern Sierra Nevada Mtns., Paradise, yard of residence at end of Kerr Lane 526 Comment
  JEPS113214  Quercus lobata Lowell Ahart 2007-3-28 13601 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
  CHSC44910  Quercus vacciniifolia Lowell Ahart 1988-7-28 6140 Butte At the north side of the dam at Lost Creek Reservoir. 1005 Comment
  UC1135901  Quercus wislizeni J. E. Sowder 1933-7-1 101 Butte Promontory Peak, SW slope 1005 Comment
  JEPS119727  Quercus wislizeni var. wislizeni Lowell Ahart, Susan Bazell, Josephine Guardino, Wes Dempsey 2012-7-5 18272 Butte Path in Cedar Grove, southwest of parking area, Lower Bidwell Park, Chico. Comment
  CAS-BOT-BC379413  Ranunculus alismifolius var. alismellus H. F. Copeland 1920-7-11 67 Butte Scotch John Meadows 1829 Comment
  CAS-BOT-BC379223  Ranunculus aquatilis var. aquatilis Lowell Ahart 1970-4-4 s.n. Butte Honcut, Peter Ahart Ranch 150 Comment
  CHSC10756  Ranunculus aquatilis var. hispidulus Lowell Ahart 1968-5-8 Butte Peter Ahart Ranch, Honcut. 45 Comment
  CHSC52792  Ranunculus flammula var. ovalis R. Preston; J. Fuller, R. A. Schlising 1981-7-21 4158 Butte Ne part of county, N of Snow Mountain ridge. In shoreline of small lake. 1950 Comment
  CDA15363  Ranunculus occidentalis G. F. Hrusa 1997-5-29 13802 Butte Sierra Nevada; Sucker Run Creek, ~1.5 mi. SSE of Feather Falls townsite. Comment
  CHSC115444  Ranunculus occidentalis M. Sutton; C. Yasuda 2013-4-9 28 Butte Centerville Flumes. 350 Comment
  CHSC31209  Ranunculus occidentalis var. occidentalis M. S. Taylor 1980-4-1 2426 Butte On bluffs above Honey Run Covered Bridge, ca. 6 mi e of Chico. 182 Comment
  CHSC46849  Ranunculus occidentalis var. occidentalis Kirsten Tarp 1982-4-8 107 Butte Near Oroville Dam. Comment
  CHSC41520  Ranunculus occidentalis var. ultramontanus Kirsten Tarp 1983-8-12 352 Butte N part of county, e of Philbrook Reservoir. 1889 Comment
  CHSC41521  Ranunculus occidentalis var. ultramontanus Kirsten Tarp 1983-8-27 358 Butte N part of county, n of Philbrook Reservoir, at Coon Hollow. Near jeep trail. 1706 Comment
  CHSC115202  Ranunculus pusillus Lowell Ahart 2015-5-5 20139 Butte Located on the bottom of a large vernal pool, about 30 yards north of Larkin Road, about 400 yards south of Larkin Road Boat Launch Area, near the Themalito Afterbay, about 1 mile southwest of Oroville Airport, about 6 miles (air) southwest of Oroville. Valley Grassland. 42 Comment
  UCD97314  Ranunculus uncinatus E. B. Copeland 1930-6-29 641 Butte Jonesville. 1500 Comment
  CHSC43729  Ranunculus uncinatus var. parviflorus Vernon Oswald; M. S. Taylor 1985-5-30 1791 Butte Four Trees Rd. 0.2 mi w of the S. Branch of Mill Creek. Along the road near an intermittent stream. 810 Comment
  CHSC93958  Ranunculus uncinatus var. uncinatus R. D. Fischer 2004-6-20 754 Butte Sierra Nevada Mountains, north-east corner of Butte County and ca. 4 miles north of Butte Meadows off Scout Road. Boy Scout Camp. Plants collected off a dirt road running on the east side and parallel to Chico Meadows. 1371 Comment
  JEPS115273  Rhamnus ilicifolia Lowell Ahart 2009-6-30 15963 Butte South of a small drainage, along Guardian Rock Trail, about 5/8 mile (air) southwest of the intersection of Ten Mile House Road and Highway 32, Upper Bidwell Park, about 10 miles northeast of Chico 386 Comment
  NY43527  Rhamnus rubra S. Bianco 1995-9-7 1025 Butte Concow area, between Jarbo Gap & Concow, along Deadwood Rd 579 Comment
  RSA719541  Rhamnus rubra Michael A. Vincent, K. Levings 2006-7-29 12885 Butte NE of Chico along Rt. 32. Comment
  HSC100784  Rhamnus tomentella subsp. tomentella Lowell Ahart 2009-5-23 15724 Butte S side of Ten Mile House Rd., Upper Bidwell Park, 1/2 (air) mi. SW of the intersection of Hwy. 32 and Ten Mile House Rd., 10 (air) mi. NE of Chico. 311 Comment
  CHSC5979  Rhaphiolepis indica M. MacArthur 1968-6-12 140 Butte Just outside NW side of Biology Stockroom in LS bldl, along paved path, Chico State College campus. 60 Comment
  CHSC6018  Rhaphiolepis indica M. MacArthur 1968-6-19 273 Butte SW entrance to EP bld., Chico State College. 60 Comment
  CHSC13517  Rhododendron occidentale A. R. Morrison 1974-4-20 Butte On trail to Feather Falls, ca. 2 mi. upstream from Lake Oroville. Comment
  CHSC23706  Rhododendron occidentale M. S. Taylor 1976-5-5 1101 Butte On e side of Bald Rock Rd, ca. 4 mi s of Big Bald Rock, ca. 13 mi ne of Oroville. 914 Comment
  UC203616  Rhus trilobata A. A. Heller 1914-3-19 11212 Butte canyon of Big Chico Creek 76 Comment
  CHSC48902  Ribes nevadense Vernon Oswald 1984-4-9 1120 Butte Bryant Ravine Rd., 0.8 mi n of its jct. with Lumpkin Rd. near Feather Falls. 853 Comment
  UC176366  Ribes nevadense A. A. Heller 1913-6-7 10823 Butte near Stirling; West Branch of the North Fork of the Feather River 914 Comment
  CHSC20960  Ribes roezlii M. S. Taylor 1975-9-12 909 Butte Ca. 500 ft w of Hwy 32, ca. 24 mi ne of Chico. 1066 Comment
  CAS-BOT-BC198962  Ribes roezlii var. roezlii A. A. Heller 1919-3-12 13088 Butte Ten Mile House east of Chico Comment
  CAS-BOT-BC340982  Robinia pseudoacacia Lowell Ahart 1968-4-20 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  CHSC31812  Robinia pseudoacacia L. Ahart 1975-5-3 748 Butte Peter Ahart Ranch, Honcut. 45 Comment
  SEINET13711417  Rorippa curvisiliqua Lowell William Ahart, Lowell William Ahart 1999-1 8155 Butte 12 Mi SW Chico, 2 Mi SE Ordbend, Sacramento River Comment
  UCD149847  Rorippa palustris BED 1974-6-17 s.n. Butte Gray Lodge Wildlife Area, Field 53. Comment
  JEPS103432  Rorippa palustris var. occidentalis Lowell Ahart 2002-4-15 9491 Butte On the E side of 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
  JEPS108924  Rorippa palustris var. occidentalis Lowell Ahart 2005-12-11 12509 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
  CHSC82478  Rosa bridgesii Lowell Ahart; John Dittes, Josephine Guardino 2002-6-21 9742 Butte 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
  UC127746  Rosa bridgesii Miss Kate Conger 1907-1 Butte Brush Creek 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
  RSA755419  Rosa californica L. Ahart 2009-8-3 16264 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 the intersection of Highway 32 and Ten Mile House Road, about 10 miles northeast of Chico. 240 Comment
  JEPS103255  Rosa eglanteria Lowell Ahart 2002-9-8 9933 Butte 1 3/4 mi N by road from town of Feather Falls (W side of paved road, 1/4 mi S of the first parking spaces at the Feather Falls Trailhead) 854 Comment
  CHSC27335  Rosa gymnocarpa T. B. Devine 1977-6-5 428 Butte Beside P.G. and E. Flume. Ca. 1 mi n of De Sabla off Humbug Rd. 853 Comment
  CHSC65463  Rosa gymnocarpa Vernon Oswald 1985-6-10 1825 Butte 0.1 mi w of Hwy 32 on spur road 60G which is located 4.5 mi n of Platte Mtn. Lookout. On the edge of the road. 975 Comment
  SEINET10483515  Rosa gymnocarpa Mary Susan Taylor 1979-10-5 Taylor 2225 Butte T23N R4E sec 18. SE side of Paradise Lake (from picnic area to first creek coming into lake, along road), ca. 0.5 mi N of Coutolenc Rd, ca. 5 mi N of Magalia. 732 Comment
  CDA42879  Rosa multiflora L. Ahart 2012-5-17 18075 Butte On the sides of a horse trail, about 20 yards north of Big Chico Creek, southwest of the southwest corner of the old walnut orchard, about 3/5 mile west of Peterson Drive, Lower Bidwell Park, Chico. Comment
  SEINET7545148  Rosa pisocarpa subsp. ahartii B. Ertter, L. Ahart 2007-1 19074 Butte Black Bart Road 1.3 miles from lower junction with Forbestown Road, ca. 10 airmiles ESE of Oroville 655 Comment
  CDA5119  Rotala indica G. D. Barbe, June McCaskill 1990-9-5 4369 a Butte Experimental fields of the Rice Experiment Station, West Hamilton Road at Riceton Highway, north of Biggs. 0 Comment
  CHSC89501  Rotala indica G. Douglas Barbe 1978-8-14 2437 Butte Check-levees, Biggs Rice Experiment Station. [Lat./Long. on label is '39 degrees 44' N; 121 degrees 40' W']. Comment
  CHSC116725  Rubus armeniacus Lowell Ahart 2016-5-24 20867 Butte On the bottom of a large drainage, about 100 yards north of the ditch, about 100 yards south of La Porte Road, about 1/4 mile southwest of the intersection of La Porte Road and Loma Rica Road, about 3 1/4 miles (air) northeast of Honcut. 44 Comment
  SEINET10483860  Rubus armeniacus Lowell Ahart, Peter Ahart 1984-6-10 Ahart 4716 Butte About 2 mi SW of Forbestown Diversion Dam, NE of Forbestown; Yellow Pine Forest; 700 m. 700 Comment
  RSA719540  Rubus discolor Michael A. Vincent, K. Levings 2006-7-29 12886 Butte NE of Chico along Rte 32. Comment
  CHSC96817  Rubus glaucifolius Lowell Ahart 2007-5-29 13922 Butte About 1/8 mile south of Bald Rock Dome, on the east side 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. 685 Comment
  UC1128632  Rubus parviflorus P. L. Johannsen 1936-7-28 969 Butte 2 1/4 mi n junction of Butte and Secret Creeks (Plot 11); Paynes Creek Quad. Comment
  UC426912  Rubus parviflorus E. B. Copeland 1930-7-16 419 Butte Jonesville 1600 Comment
  CHSC44231  Rubus pensilvanicus Vernon Oswald 1988-6-30 3541 Butte Hwy 32, 1.1 mi s of Lomo at the 35.9 mile post. 1146 Comment
  JEPS29839  Rubus praecox Rimo Bacigalupi and L. R. Heckard 1962-6-1 8583 Butte along road to Centerville about 200 feet e of its inception at the Paradise Road junction; along road to Centerville 60 Comment
  CHSC65688  Rubus ursinus Vernon H. Oswald 1996-3-22 7253 Butte Sacramento Valley. Sacramento River National Wildlife Refuge, Llano Seco Unit. Sanctuary 1, SE corner of Tract 1, on the edge of a branch of Angel Slough. 30 Comment
  RSA755442  Rubus ursinus L. Ahart 2009-5-23 15736 Butte East side of Ten Mile House Road, Upper Bidwell Park, about 3/4 air mile west of Highway 32, about 10 miles northeast of Chico. 236 Comment
  CAS-BOT-BC421734  Rumex conglomeratus Lowell Ahart 1989-5-31 6331 Butte North of the end of Truex Road, near Lake Oroville, about 1/4 mile north-west of the West Branch Bridge across Lake Oroville 304 Comment
  CHSC29736  Rumex crispus J. D. Jokerst 1980-4-21 628 Butte Top of North Table Mt., N of Cherokee Rd. Occasional along edges of vernal stream courses. 381 Comment
  CHSC33685  Rumex dentatus L. Ahart 1981-5-16 2804 Butte In low places on Graylodge Waterfowl Mgmt Area, 11 mi sw of Gridley. 35 Comment
  UCD101368  Rumex obtusifolius L. Ahart 1982-9-13 3807 Butte Pinkard Creek, ca. 1/8 mi. N of Lost Creek Reservoir Dam. Ca. 2.2 mi. NW of Strawberry Valley. 1100 Comment
  SEINET10904513  Rumex pulcher Mary Susan Taylor 1977-7-15 Taylor 1420 Butte Along West Branch of the Feather River, ca. 1 mi E of the Skyway, ca. 1 mi N of Magalia. Riparian Woodland. 678 Comment
  CHSC90800  Sagina decumbens subsp. occidentalis Lowell Ahart 2005-5-2 11776 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
  RSA4630  Sagittaria cuneata E. B. Copeland 1930-7-29 405 Butte Jonesville. 1550 Comment
  SD74  Sagittaria cuneata E. B. Copeland 1930-7-29 Butte Above Jonesville. 1700 Comment
  CHSC66363  Sagittaria montevidensis subsp. calycina Vernon H. Oswald 1996-6-20 7831 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. At the S end of Tract 3.4, Sanctuary II. 33 Comment
  JEPS121913  Sagittaria montevidensis subsp. calycina Lowell Ahart 2014-10-14 19883 Butte Peter Ahart Ranch, about 2 1/4 miles north and 1/4 east of Honcut, about 12 miles south of Oroville. Comment
  CAS-BOT-BC267091  Sagittaria sanfordii Lowell Ahart 1987-10-22 5920 Butte In shallow water in Madrone Lake, near the Oroville Quincy Highway 609 Comment
  CAS-BOT-BC103452  Salix eastwoodiae E. B. Copeland 1931-6-11 617 Butte Jonesville, Kirby's Meadow 1750 Comment
  SEINET10538833  Salix exigua Mary Susan Taylor 1975-4-26 Taylor 525 Butte Kunkle Reservoir, ca. 500 yds E of Pentz-Magalia Hwy, ca. 1 m SE of Paradise. With Orthocarpus erianthus, Centaurea solstitus, Lupinus bicolor, Typha latifolia. 610 Comment
  CHSC65690  Salix gooddingii Vernon H. Oswald 1996-3-22 7249 Butte Sanctuary 1, S edge of Tract 2. 33 Comment
  LA208653  Salix gooddingii A. A. Heller; 1914-4-6 11262 Butte Chico-Oroville rd 12 mi from Chico on the banks of Dry Creek Comment
  CAS-BOT-BC104083  Salix hindsiana C. R. Ball 1915-6-4 1944 Butte In old river channel near Biggs Comment
  CAS-BOT-BC106984  Salix lasiolepis Lowell Ahart 1987-4-30 5492 Butte 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
  JEPS119574  Salix lasiolepis Lowell Ahart 2012-3-9 17772 -A 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
  CAS-BOT-BC129581  Salix lasiolepis var. lasiolepis A. A. Heller 1914-4-27 11324 Butte Hills 8 miles north of Oroville, on the stony banks of a winter stream 8 miles north of Oroville Comment
  UC478538  Salix lemmonii E. B. Copeland 1931-6-11 313 Butte Kirby's Meadow Jonesville 1750 Comment
  UC600413  Salix lemmonii H. F. Copeland 1931-6-11 1544 Butte Kirby Meadows Jonesville; , Kirby Meadows 1828 Comment
  UC446425  Salix melanopsis E. B. Copeland 1931-6-30 Butte Jonesville beside Butte Creek 1500 Comment
  SEINET5570446  Salvia sonomensis H. S. Gentry, S. Koch 1962-1 19776 Butte 1 mi. NE of Forest Ranch, along Rt. 32. 762 Comment
  UC215467  Salvia sonomensis A. A. Heller 1915-4-12 11810 Butte near Cohasset (Sierra foothills); Sierra Comment
  CHSC90240  Sambucus mexicana Robert Kissane 1989-4-22 15 Butte On Moore's ranch 2090 Oak Park Ave., Chico. 70 Comment
  POM219484  Sambucus mexicana E. B. Copeland 1931-7-29 691 Butte Jonesville. 1550 Comment
  UC1575631  Sambucus mexicana Dr. Edward Palmer Jun 7 1892-Jun 12 1892 2095 Butte near Chico Comment
  SEINET10483279  Sanguisorba minor Lowell Ahart 1985-5-10 Ahart 4958 Butte East branch of Potter Ravine, about 2 1/4 miles north of Oroville Dam. Comment
  CHSC31405  Sanicula bipinnata Stephen M. Turek 1980-4-14 6 Butte Ca. 3 yds n of Humboldt Road, 2 mi e of E. Monte Road, 50 yds s of Highway 32, 1 mi e of Chico. 71 Comment
  UC175514  Sanicula bipinnata A. A. Heller 1913-4-5 10707 Butte above Oroville (n side of Feather River); Feather River Comment
  CHSC96789  Sanicula bipinnatifida Lowell Ahart 2007-4-30 13711 Butte On the east edge of Jordan Hill Road, about 2 1/2 miles northwest of Concow Creek, about 2 1/2 miles (air) northwest of Concow Reservoir. 637 Comment
  SFV2612  Sanicula bipinnatifida M. L. Vincent 1961-3-26 17 Butte Sierra Nevada Near Feather River Bridge. Nelson Bar Road, two miles east of Pentz Road. Southeast of Paradise. 430 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
  SEINET10454591  Sanicula tuberosa Mary Susan Taylor 1980-4-18 Taylor 2521 Butte E side of Humbug Road, ca. 2 mi NE of Centerville; on dry bluff. With J.D. Jokerst. 488 Comment
  CAS-BOT-BC436861  Saxifraga Lowell Ahart 1975-3-3 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  CAS-BOT-BC436867  Saxifraga Lowell Ahart 1975-3-3 s.n. Butte Peter Ahart Ranch, Honcut 45 Comment
  CHSC66168  Schoenoplectus acutus var. occidentalis Vernon H. Oswald 1996-5-27 7656 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Along a drainage on the bed of seasonal marsh at the SW corner of Tract 2, Sanc-tuary II. 33 Comment
  CHSC110324  Schoenoplectus tabernaemontani B. Castro; Margie Graham 2006-9-7 1611 Butte Sacramento Valley. 1.3mi W of Highway 99 and 2 mi NE of Richvale and ca 1.2mi N of Richvale Hwy in Cherokee Canal.. On W side of main channel, on grassy terrace ca 50 ft from water in channel. 35 Comment
  CHSC42769  Schoenoplectus tabernaemontani Lowell Ahart 1987-8-3 5846 Butte Along the North Fork of the Feather River, near Poe Power House, about 2 miles south-east of Jarbo Gap. 271 Comment
  UC1100776  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1946-8-7 12993 Butte Gridley Road n Butte Sink (Big Pond near river, Grey Lodge Game Refuge); Grey Lodge Game Refuge, n of Butte Sink Comment
  JEPS122026  Scirpus congdonii Lowell Ahart 2014-7-2 19542 Butte On the north 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
  CHSC38913  Scirpus diffusus Vernon Oswald 1983-5-23 548 Butte Upper Bidwell Park, Chico, on the n bank of Chico Creek e of Brown's Hole. 201 Comment
  UC1100920  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-15 13046 Butte Greylodge Game Refuge near caretaker's house (Butte Sink); , Greylodge Game Refuge Comment
  JEPS94138  Scleranthus annuus subsp. annuus Lowell Ahart 1998-6-9 7981 Butte ca. 7 mi. (air) n. Oroville (on the w. side of Cherokee Rd., ca. 50 ft s. of the cow chute, North Table Mt.); North Table Mt. 403 Comment
  CHSC40295  Scribneria bolanderi Ahart; Jokerst 1985-5-10 4959 Butte In the road gutter, along the dirt road 1/2 mile east of Potter Ravine, south of the east branch of Potter Ravine, about 2 1/2 miles north-east of Oroville Dam. 320 Comment
  CHSC78227  Scribneria bolanderi Lowell Ahart 2000-6-4 8442 Butte In the small meadow south of the intersection of Black Bart Road and Forbestown Road, about 3 1/2 miles (air) southwest of Forbestown. 731 Comment
  UC887501  Scrophularia californica A. A. Heller 1916-4-13 12322 Butte e Chico (Stilson Canyon) Comment
  CDA13322  Scutellaria californica G. F. Hrusa, T. D. Wilfred 1996-7-9 13168 Butte Sierra Nevada; approx. 0.2 m. E of bridge over Marble Creek on USFS N60. Comment
  RSA718334  Scutellaria californica L. Ahart 2006-6-9 12658 Butte North side of Bardees Bar Road, north of the small stream, on the east side of the large stream, about 1/8 mile northwest of the poor bridge across the North Fork of the Feather River at Bardees Bar, about 2.75 miles (air) southwest of Pulga. 386 Comment
  CHSC14122  Scutellaria siphocampyloides L. V. Ritter 1969-5-5 309 Butte Ca. 2 mi w of Cohassett, ca. 10 yds s of Cohassett Hwy, ca. 13 mi ne of Chico. Comment
  CHSC38482  Scutellaria tuberosa Vernon Oswald 1983-3-14 183 Butte Upper Bidwell Park, Chico, on the north rim ca. 1.8 mi e of the power lines. 350 Comment
  CAS-BOT-BC415020  Sedella pumila A. A. Heller; H. E. Brown 1902-5-7 5486 Butte Berry Canyon (near Clear Creek) Comment
  CHSC33354  Sedella pumila R. M. Winchell 1980-4-17 6 Butte Covered Bridge along Little Butte Creek. Comment
  JEPS119771  Sedella pumila Lowell Ahart 2012-5-12 18037 Butte On the south side of Humboldt Trail, about 200 yards east of Guardian Trail, about 1/8 mile west of Highway 32, south part of Upper Bidwell Park, about 7 1/2 miles (air) northeast of Chico. Comment
  POM142365  Sedella pumila E. B. Copeland 1903-5-2 3019 Butte Chico. Comment
  CHSC21005  Sedum spathulifolium M. S. Taylor 1975-4-29 546 Butte On s side of Hwy 70, ca. 25 mi ne of Oroville. Comment
  CHSC28875  Selaginella hansenii J. D. Jokerst; M. S. Taylor 1980-2-14 42 Butte Along E side of Lumpkin Rd ca 200 m N of its jct with McCabe Cr. Comment
  CHSC28877  Selaginella hansenii M. S. Taylor 1980-3-1 2330 Butte West end of county dump on n side of Neal Rd, ca. 1 mi e of Hwy 99, ca. 7 mi s of Chico. 76 Comment
  HSC78630  Selaginella hansenii L. P. Janeway 1984-9-29 1177 Butte At top of Feather Falls on Fall River (a tributary to Middle Fork of Feather River), 'Feather Falls Scenic Area 579 Comment
  JEPS79620  Selaginella hansenii Edward Lee 1951-10-9 Butte ca. 10.1 mi out of city limits Oroville (on Hwy. 24); N. Fork Feather River Comment
  CDA13882  Senecio aronicoides G. F. Hrusa, T. D. Wilfred 1997-5-7 13741 Butte Sierra Nevada; Above Little Butte Creek, N of Magalia. Immed. E of Holmwood Drive. Comment
  CHSC100949  Senecio aronicoides R. A. Schlising 1980-6-10 3678 Butte Carpenter Ridge, along Humboldt Road, 1.9 miles northeast of junction with Highway 32 at Lomo. 1356 Comment
  CHSC26844  Senecio aronicoides M. S. Taylor 1978-6-24 1636 Butte On n side of Old Humboldt Rd, ca. 1/2 mi e of Butte Meadows. 1371 Comment
  CHSC86445  Senecio eurycephalus var. lewisrosei Jenny Marr 1993-7-1 97 Butte Located in Northern Sierra Nevada, between Concow and Pulga, on a serpentine outcrop belonging to LNF. Site approx. 4 air miles NE of Concow Reservoir. 1105 Comment
  RSA712950  Senecio eurycephalus var. lewisrosei L. Ahart 2006-5-10 12616 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
  CHSC4652  Senecio integerrimus var. major R. Carter 1966-4-26 364 Butte Found ca. 10 mi. NE of Oroville along E side of USFS road 21N40 to Bloomer Mt., in woods 15 yds. off road 2 mi. W from intersection with Oroville-Quincy Rd. 762 Comment
  UCD146245  Senecio sylvaticus Daniel S. Park; D. Potter, J. J. Petersen 2010-4-10 14 Butte Table Mt. near creek. 335 Comment
  CHSC420  Senecio vulgaris P. Delaplane 1965-3-20 4 Butte In back yard of 817 Rio Chico Way, Chico. 30 Comment
  CHSC90648  Senecio vulgaris Lowell Ahart 2005-4-2 11681 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
  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
  CAS-BOT-BC364544  Senecio vulgaris Lowell Ahart 1982-1-8 3232 Butte Peter Ahart Ranch, about 1 1/2 miles north and 1 mile east of Honcut 50 Comment
  CHSC27181  Sequoiadendron giganteum M. MacArthur 1968-6-17 210 Butte Ca. 30 ft N of Big Chico Creek and 50 ft. from path to bridge N of Dining Hall, Chico State College campus. 60 Comment
  JEPS120652  Sequoiadendron giganteum Lowell Ahart 2013-10-26 19206 Butte On the east side of the Bald Mountain Lookout, Bald Mountain. Comment
  CAS-BOT-BC364730  Sericocarpus oregonensis subsp. californicus A. A. Heller 1916-9-23 12658 Butte Sierra Foothills near Forest Ranch Comment
  CAS-BOT-BC240120  Setaria pumila John Thomas Howell 1961-9-22 36765 Butte North Fork of Feather River, 10 miles from Oroville Comment
  SEINET10609527  Setaria pumila Roland McKee 1918-8-12 McKee s.n. Butte Weed in alfalfa plots, Plant Industry Station, Chico. Comment
  SEINET10507784  Setaria sphacelata Lowell Ahart 1985-10-12 Ahart 5199 Butte At the end of Nelson Bar Road, about 1 mile south of Kunkle Reservoir, about 3 miles south of Paradise. Comment
  CAS-BOT-BC240191  Setaria viridis John Thomas Howell 1959-9-20 34679 Butte Eastern outskirts of Oroville 60 Comment
  CHSC31809  Sherardia arvensis L. Ahart 1970-4-4 37 Butte Peter Ahart Ranch, Honcut. Comment
  CHSC79358  Sherardia arvensis M. S. Taylor; J. Jokerst 1980-5-15 2628 Butte Ca. 1/4 mi E of Cohasset Rd, ca. 9 mi NE of Chico. 396 Comment
  SEINET10500671  Sherardia arvensis Mary Susan Taylor 1979-5-6 Taylor 1991 A Butte Peter & Lowel Ahart Ranch, Honcut; Valley Grassland. Comment
  CHSC54106  Sidalcea asprella Vernon H. Oswald; Lowell Ahart 1991-5-13 4578 Butte Dan Beebe Trail in Lake Oroville Recreation Area, between Canyon Drive and Oroville Dam Blvd East (opposite the spillway). 213 Comment
  CHSC116734  Sidalcea diploscypha Lowell Ahart 2016-5-24 20845 Butte 50 yards north of the ditch, about 200 yards west of Loma Rica Road, about 250 yards southwest of the intersection of Loma Rica Road and La Porte Road, about 3 1/2 miles (air) northeast of Honcut. Grassy area in Foothill Woodland. 50 Comment
  CHSC34964  Sidalcea diploscypha R. Schlising; P. Minton 1981-5-3 4043 Butte At north border of county. W of Singer Creek and E of Cana/Pine Creek Road. 57 Comment
  CHSC20407  Sidalcea hartwegii C. Glascock 1965-5-16 383 Butte At crest of hill above Oro-Bangor Hwy, 1/2 mi. e on Foothill Blvd, Oroville. Comment
  CHSC61159  Sidalcea hartwegii Vernon H. Oswald 1993-5-18 5397 Butte Middle Butte Creek Trail on the W side of the creek and on the upstream side of Ponderosa Way, ca. 2.25 mi (air) NW of Magalia. 707 Comment
  UC66034  Sidalcea hartwegii A. A. Heller and H. E. Brown 1902-5-9 5512 Butte near Clear Creek; near Clear Creek, Berry Canyon Comment
  CHSC31759  Sidalcea hirsuta L. Ahart 1978-5-15 1723 Butte Peter Ahart Ranch, Honcut. 50 Comment
  POM61858  Sidalcea hirsuta A. A. Heller, H. E. Brown 1902-5-15 5557 Butte Near Biggs. Comment
  LA205945  Sidalcea oregana subsp. spicata E. B. Copeland; 1930-7-15 sn Butte Jonesville 1500.0 Comment
  RSA755645  Sidalcea robusta L. Ahart 2009-5-15 15681 Butte About 10 yards E of the dirt road that is Ten Mile House Road, Upper Bidwell Park, about 3/4 air mile W of Highway 32, about 10 miles NE of Chico. 235 Comment
  CHSC54299  Silene antirrhina Vernon H. Oswald; Lowell Ahart 1991-6-5 4647 Butte Dirt road to Minnie-Ha-Ha Mine located on Big Chico Creek, on the west side of Hwy 32 ca. 1.5 miles (air) northwest of Platte Mtn Lookout, between Forest Ranch and Lomo. 701 Comment
  SEINET10537492  Silene antirrhina Lowell Ahart 1985-5-31 Ahart 5032 Butte Lake Oroville, 1/8 mile east of the Enterprise Launch Area, about 1/2 mile west of the Enter- prise Bridge across Lake Oroville, north-east of Oroville. Comment
  JEPS115630  Silene gallica Lowell Ahart 2009-5-15 15690 Butte On the east side of Big Chico Creek, about 50 yards west of Ten Mile House Road, Upper Bidwell Park, about 3/4 mile (air) west of Highway 32, about 10 miles northeast of Chico 203 Comment
  HSC38052  Silene gallica Thomas W. Nelson, Jane P. Nelson 1976-5-9 2458 Butte Intersection of Palermo Rd. and Hwy. 70, 4 mi. S of Oroville Comment
  CHSC42235  Silene laciniata subsp. californica Rusti Gammon 1986-4-10 3 Butte Ca. 4 mi s of Centerville, e bank of Butte Creek, 100 yds ne. 237 Comment
  CHSC48268  Silene lemmonii Vernon H. Oswald 1983-8-17 982 Butte Humboldt Summit on Humboldt Rd, ca. 3.3 mi ne of Jonesville, at the junction of Butte, Tehama, and Plumas counties. 1999 Comment
  CAS-BOT-BC135351  Sisyrinchium A. A. Heller 1938-7-20 15285 Butte Upper end of Snag Lake, 7 miles east of Chaparral. Comment
  CHSC41256  Sisyrinchium idahoense S. C. Morey 1983-7-21 475 Butte Cherry Hill Meadow. On n side of humboldt Rd., ca. 3.2 mi e of Butte Meadows. 1414 Comment
  UC726126  Smilacina stellata A. A. Heller 1919-5-17 13153 Butte near Stirling; Feather River 975 Comment
  SEINET10546505  Solanum nodiflorum Mary Susan Taylor 1975-10-29 Taylor 970 Butte Butte Creek, ca. 2-500 yds S of Humbug Road, ca. 2 mi E of junction of the Skyway and Humbug Road; with Platanus racemosa, Rhus trilobata. Comment
  CHSC11881  Solanum parishii E. B. Copeland 1930-7-27 453 Butte Jonesville. 1600 Comment
  CHSC31407  Solanum parishii Diane M. Reilly 1980-4-19 14 Butte Under power lines, ca. 1/4 mi sw off Big Bend Rd, ca. 2 mi off Hwy 70, ca. 25 mi e of Chico. 609 Comment
  CDA6222  Solanum scabrum W. Sauer, L. Heinricks 1974-9-11 Butte Stirling City. 0 Comment
  SEINET10474350  Solidago californica Lowell Ahart, Peter Ahart 1983-6-26 Ahart 4148 Butte T20N R5E ne sec 15. Along Ponderosa Way (Big Ridge Rd), ca. 1 mi se of East Fork Canyon Creek, ca. 14 mi ne of Oroville. Foothill Woodland; 575 m. 575 Comment
  CHSC48199  Solidago elongata Vernon Oswald 1987-7-16 3120 Butte West Branch of Feather River upstream of where it crosses the road to Jones Meadow, ca. 1 mi (air) ne of Inskip. 1341 Comment
  CHSC13804  Solidago velutina subsp. californica K. R. Stern 1972-9-19 3782 Butte Margins of Perkins Lake, Llano Seco Rancho, ca. 10 mi sw of Chico. Comment
  CHSC21253  Sonchus asper M. S. Taylor 1975-3-25 421 Butte In field between 11th and 12th Aves, at end of Citrus Ave, Chico. 60 Comment
  CHSC37276  Sonchus asper M. S. Taylor; L. Ahart, J. Jokerst 1982-4-28 4351 Butte Graylodge Waterfowl Refuge, n side of Rutherford Rd, ca. 1.8 mi w of its jct with Pennington Rd at the checking station, ca. 12 mi sw of Gridley. 21 Comment
  CHSC111368  Sonchus oleraceus Lowell Ahart 2012-5-14 18061 Butte Planted area between sidewalk and Vallombrosa Avenue, west of Manzanita Avenue, just west of the bridge across Big Chico Creek, Lower Bidwell Park, Chico. 79 Comment
  CHSC114962  Sonchus oleraceus Lowell Ahart 2015-1-27 19923 Butte Along the west side of Virginia Street, northwest of the intersection of Hazel Street and Virginia Sreet, Gridley. 29 Comment
  JEPS119796  Sonchus oleraceus Lowell Ahart 2012-5-14 18061 Butte Planted area between sidewalk and Vallombrosa Avenue, west of Manzanita Avenue, just west of the bridge across Big Chico Creek, Lower Bidwell Park, Chico. Comment
  CAS-BOT-BC158897  Sorbus scopulina A. A. Heller 1928-7-25 14706 Butte Along the forest service trail between Jonesville and Butte Creek House Comment
  CAS-BOT-BC235258  Sorghum bicolor John Thomas Howell 1959-9-26 35094 Butte Roadside at Pulga Bridge, N. Fk. Feather River Comment
  CHSC38859  Sorghum halepense Vernon Oswald 1983-6-3 623 Butte Upper Bidwell Park, Chico, in Lindo Channel between Five Mile Recreation Area and the flood-control gates. 79 Comment
  POM181467  Sorghum halepense H. F. Copeland 1923-8-14 847 Butte Near Richvale. Comment
  SACT002287  Sorghum halepense Herbert Copeland 1923-8-14 Butte In mud. Comment
  SEINET8233923  Sorghum halepense Richard R. Halse 2006-8-2 6982 Butte Chico; in the Lindo Channel Greenway where it crosses under Mangrove Ave. 92 Comment
  CHSC43806  Sparganium emersum subsp. emersum Vernon Oswald; Lowell Ahart 1987-7-1 3073 Butte Cluster of 3 snow lakes ca. 3 mi (air) s of Humbug Summit, 0.5 mi w of the Butte-Plumas county line, ca. 5.5 mi (air) se of Jonesville. In the largest lake. 1935 Comment
  CDA43068  Spartium junceum L. P. Janeway 2011-5-2 10250 Butte Sacramento Valley.; South side Feather River just east of Bedrock Park, Oroville; about 10-15 m back from the edge of the water and about 1 m higher. Comment
  JEPS98351  Spergula arvensis subsp. arvensis Lowell Ahart 2000-5-23 8388 Butte 4 mi NE of Honcut (100 yds SE of the barn, about 1/4 mi NE of Honcut Cemetery) 54 Comment
  CHSC50665  Spergularia rubra Lowell Ahart 1990-4-28 6470 Butte In the borrow area, about 1/4 mile south of the Feather River, about 4/10 mile west of Pacific Heights Road, about 4 1/2 miles south-west of Oroville. 30 Comment
  CHSC65196  Spergularia rubra Lowell Ahart 1995-5-26 7572 Butte On the bottom of a small wash, Peter Ahart Ranch, about 2 1/2 miles north and 1/2 mile east of Honcut, about 12 miles south of Oroville. 38 Comment
  CHSC52700  Spiraea cantoniensis L. P. Janeway; B. Castro 1990-3-24 3657 Butte Campus of California State University, Chico. Near Big Chico Creek along path from Holt Hall to the bridge to Sylvester's Cafe-by-the-Creek. 57 Comment
  SBBG28490  Spiraea douglasii E. B. Copeland 1929-7-15 Butte Jonesville 1500 Comment
  CHSC102516  Spiranthes porrifolia Lowell Ahart 2009-5-30 15961 Butte Along a small drainage west of the Guardian Rock Trail, about 10 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
  CHSC10586  Spiranthes porrifolia Lowell Ahart 1968-6-12 Butte Swede's Flat Road. 304 Comment
  JEPS110395  Spiranthes stellata 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
  JEPS108131  Sporobolus creber Lowell Ahart 2005-10-22 12462 Butte Irrigated pasture, Daley Ranch, about 1 mile northeast of Honcut, about 13 miles south of Oroville 34 Comment
  UC1594710  Sporobolus cryptandrus Lowell Ahart 1992-7-23 6834 Butte at intersection of Shippee Rd. and Openshaw Rd. (along edge of Oroville Chico Hwy.) 60 Comment
  CHSC84886  Stachys ajugoides var. rigida R. D. Fischer 2003-6-22 3 Butte Chico Meadows near Butte Meadows. South side of rd. 26N09 as it passes through northern end of mdw. Near fence line of Boy Scout Camp, Camp Lassen. 1280 Comment
  CHSC88063  Stachys ajugoides var. rigida R. D. Fischer 2004-4-20 147 Butte Sierra Nevada foothills within upper Bidwell Park in Chico on the east-side addition along Hwy. 32. Located along 10 Mile House Road about 1/8 mile below junction of Guardian Trail. 396 Comment
  UC600445  Stachys ajugoides var. rigida H. F. Copeland 1927-9-4 Butte Jonesville Comment
  CHSC70805  Stachys pycnantha H. Durio 1995-7-24 Butte Ca 1.5 air mi S of Hungry Hunt Peak, and 1.5 mi E of Hwy 70, ca 0.2 mi S on 'A' Spur off USFS Rd 22N84. 914 Comment
  JEPS114699  Stachys pycnantha Lowell Ahart 2008-7-23 15154 Butte on the N side 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 Ponderosaedge 258 Comment
  CHSC66077  Stachys stricta Vernon H. Oswald 1996-5-23 7632 Butte Sacramento River National Wildlife Refuge, Llano Seco Unit. U.S. Fish and Wildlife Service parcel between 7 Mile Lane and the Sacramento River. Growing along a branch of Angel Slough at the SE corner of Tract 1, Sanctuary I. 33 Comment
  UC179507  Stebbinsoseris heterocarpa A. A. Heller 1914-4-13 11282 Butte 8 mi north of Oroville. Comment
  SEINET10537441  Stellaria Mary Susan Taylor, Lowell Ahart 1981-8-16 Taylor 4198 Butte T25 N R5E SW 1/4 sec 29. Pulga NW quad. Jones Meadow, ca. 3 mi S of Philbrook Reservoir, ca. 6 mi NE of Stirling City. Montane Meadow. 6000 ft. 1829 Comment
  CAS-BOT-BC175313  Stellaria borealis subsp. sitchana E. B. Copeland 1929-7-1 s.n. Butte Jonesville 1500 Comment
  CHSC36076  Stellaria borealis subsp. sitchana R. A. Schlising 1982-6-16 4294 Butte E side of county ne of Oroville and Brush Creek off Oroville-Quincy Road; Rogers Cow Camp site; streamside. 1219 Comment
  CHSC45266  Stellaria calycantha V. Oswald; L. Ahart 1988-10-6 3706 Butte Meadow near the headwaters of Big Kimshew Creek, ca. 1.5 mi (air) ne of Jones Meadow. On the bed of the creek. 1889 Comment
  UC1609330  Stellaria crispa Lowell Ahart 1993-10-3 7268 Butte about 2 mi ne Coyote Gap (w branch of Wildcat Creek, on the s side) 1402 Comment
  CHSC35036  Stellaria longipes var. longipes R. A. Schlising 1980-6-8 3869 Butte NE of Butte Meadows and SW of Jonesville, along Humboldt Road to the W of Cherry Hill Campground. At meadow margin. 1402 Comment
  UC1609331  Stellaria longipes var. longipes Lowell Ahart 1993-7-23 7111 Butte about 6 air mi ne Feather Falls (e side of Fall River, e of campgrounds on large gravel bar along Fall River); Fall River 1036 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
  JEPS93969  Stellaria pallida Vernon Oswald 1998-4-6 8899 Butte North Table Mt. on the plateau on the s. side of Beaston Hollow (ca. 1.5 mi. w. of Cherokee Rd.); North Table Mt., Beaston Hollow 323 Comment
  CHSC55190  Stephanomeria elata Lowell Ahart 1991-8-25 6704 Butte On the north side of the dirt road, Forest Rd 23N60 (Jordan Creek-Marble Creek Rd) east of Marble Creek, about 6 miles (air) northeast of Brush Creek. 1097 Comment
  RSA4138  Stephanomeria lactucina E. B. Copeland 1930-7-24 500 Butte Jonesville. 1550 Comment
  SEINET10506971  Stipa Mary Susan Taylor 1981-5-14 Taylor 3718 Butte T22N R6E sw sec 16, Pulga SE quad. S side of 23N00.2 in open landing area and edge of Yellow Pine Forest, ca. 2 mi SW of Merrimac. 3700 ft. 1128 Comment
  SEINET10827380  Stipa lemmonii Robert A. Schlising 1978-4-23 Schlising 03229 Butte Magalia; serpentine outcrop just S of Magalia Reservoir and W of S.T. RR and Coutelenc Road; area of Cupressus macnabiana and Pinus sabiniana; with Festuca california and Elymus glaucus. Comment
  CHSC109681  Stipa miliacea var. miliacea Lowell Ahart 2012-6-21 18216 Butte On the south side of Big Chico Creek about 20 yards west of the Freeway, Lower Bidwell Park, Chico. 62 Comment
  CAS-BOT-BC61284  Streptanthus cordatus var. cordatus A. A. Heller 1914-6-22 11483 Butte Little Summit near Butte Mountains. 1463 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-BC87430  Streptanthus polygaloides John Thomas Howell 1962-6-16 37539 Butte Sierra Nevada. Magalia. 731 Comment
  CAS-BOT-BC87439  Streptanthus polygaloides Lowell Ahart 1988-5-30 6034 Butte Along Poe Powerhouse Road, about 0.1 mile north of the bridge across the North Fork of the Feather River. 365 Comment
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Sep 7 2020
  UC659997  Streptanthus polygaloides Lincoln Constance 1941-5-28 2826 Butte Magalia Sierra Nevada foothills, South Branch of the Feather River 487 Comment
  UCD116109  Streptanthus polygaloides R. E. Preston 1982-6-2 291 Butte 0.7 mile northeast of Lime Saddle Powerhouse, 4.5 miles southeast of Paradise. 304 Comment
  SEINET10481897  Streptanthus polygaloides Lincoln Constance 1941-5-28 Constance s.n. Butte Calyx yellow, petals white, brownish veined, crisped. Serp