Search Results — 2000 specimen records retrieved (1617 records with coordinates)
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  HSC5007  Abies concolor J. O. Sawyer 1968-10-12 756 Colusa Colusa/Lake Co. line, Snow Mtn., boundary N of Clear Lake and W of Stony Ford 2134 Comment
  CHSC46859  Acer macrophyllum Vernon Oswald 1989-9-12 4007 Colusa Goat Mtn Rd 3.0 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. 426 Comment
  CAS-BOT-BC21709  Achillea millefolium J. Clausen 1939-6-26 1743 -2 Colusa 17 miles west of Williams, just before entering Lake County Comment
  CHSC25965  Achillea millefolium L. V. Ritter 1969-4-30 220 Colusa Ca 10 mi sw of Williams, s side of Highway 20. Comment
  JEPS73474  Achillea millefolium L. R. Heckard 1972-7-9 3083 Colusa along trail from Frog Pond to Milk Ranch Frog Pond; Snow Mt. (southern range extension) 1950 Comment
  UCD50713  Achnatherum lemmonii Beecher Crampton 1958-5-19 4799 Colusa 5.8 miles south of Lodoga, Colusa County. Comment
  CAS-BOT-BC29878  Achyrachaena mollis Mrs. H. C. Cantelow 1936-4-11 1150 Colusa Bear Creek Canyon Comment
  CHSC81215  Achyrachaena mollis Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  HSC92503  Achyrachaena mollis S. Morrissette, J. Williams & K. Kopper 1994-4-24 24 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  POM163442  Achyrachaena mollis Roxana S. Ferris 1926-4-21 s.n. Colusa 3 mi W of Colusa.. Comment
  POM284473  Achyrachaena mollis Lyman Benson 1933-4-16 4330 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  CHSC112212  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 A Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCR261746  Acmispon brachycarpus Ann Howald 2003-6-9 2362 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCD66677  Acmispon denticulatus Craig D. Thomsen 2000-5-11 2290 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66709  Acmispon denticulatus Craig D. Thomsen 2001-5-24 2509 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  OBI59416  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On rd above and W of Fouts Springs 762 Comment
  UCD104192  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road (about 6 1/2 air miles southeast of Stonyford). 1127 Comment
  CHSC79504  Acmispon rubriflorus B. Castro; L. P. Janeway 2000-5-3 1121 Colusa Vicinity of Sites, Huffmaster Rd,and Antelope and Grapevine Creeks, just S of the divide between the two creeks. 365 Comment
  CHSC79737  Acmispon rubriflorus L. P. Janeway; B. Castro 2000-5-2 6691 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  UCR261731  Acmispon rubriflorus Ann Howald 2003-6-9 2361 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCR261747  Acmispon rubriflorus Ann Howald 2003-6-9 2369 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd, then c. 0.1 mile east on ranch road 397 Comment
  CHSC71112  Acmispon wrangelianus Jan Monelo 1989-4-1 13 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD57278  Acmispon wrangelianus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3646 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UCR261721  Acmispon wrangelianus Ann Howald 2003-5-30 2355 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road 397 Comment
  JEPS80827  Aconitum columbianum L. R. Heckard and J. C. Hickman 1981-7-31 5799 Colusa e. side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1645 Comment
  CHSC75739  Actaea rubra Vernon H. Oswald; Lowell Ahart 1999-6-22 9780 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at the Lily Pond. 1243 Comment
  UC1733758  Adenostoma fasciculatum Kay H. Beach 1940-5-16 1259 Colusa Colusa and Lake county line Comment
  UC217393  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains n. of town and e. of R.R. Hershey Comment
  UCD84556  Adenostoma fasciculatum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6081 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  JEPS121107  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa On thesouth side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS124234  Adiantum jordanii Lowell Ahart 2015-4-1 19989 Colusa Inner North /coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  SEINET3271565 Image available Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14749 Colusa Inner North Coast Ranges; along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  CDA4024  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4026  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4029  Aeschynomene rudis G. D. Barbe, June McCaskill 1990-9-5 4397 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  HSC86927  Aesculus californica Anthony J. Desch, Bryon Cariss 1988-4-16 33 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  JEPS80777  Agastache urticifolia L. R. Heckard and J. C. Hickman 1981-7-30 5750 Colusa Trout Creek trail se side Snow Mt.; se side of Snow Mt. 1615 Comment
  JEPS81298  Agastache urticifolia L. R. Heckard and J. C. Hickman 1982-7-5 5912 Colusa s side Snow Mt. (along streamlet below Summit Springs); s side of Snow Mt. 1524 Comment
  CHSC32211  Ageratina occidentalis James Jokerst 1980-8-7 1062 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  JEPS80139  Agoseris grandiflora var. grandiflora L. R. Heckard with J. Hickman 1980-7-2 5299 Colusa ca 10 mi w, above Summit Spring entrance to Snow Mt trail Stonyford; Snow Mt. 1630 Comment
  CHSC59937  Agoseris heterophylla M. K. Hancharick 1989-4-1 7 Colusa Ca. 0.3 mi W of jct of Hwys 20 and 16, S side of Bear Creek, ca. 18 mi SW of Williams. 321 Comment
  UC2014169  Agoseris heterophylla Ellen Dean, G. Harrington, K. Mawdsley 2007-3-30 3500 Colusa Colusa County: BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. Comment
  UCD56676  Agoseris heterophylla Jack Alderson 2007-3-25 12 Colusa BLM Payne Ranch. Destanella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  UCD67033  Agoseris heterophylla Ellen Dean; Davis Botanical Society 2008-5-31 5014 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  JEPS75880  Agrostis alba L. R. Heckard 1974-9-9 3851 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  CHSC117416  Agrostis avenacea B. Castro; Tom Boullion 2008-7-10 1762 Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, on W bank of the Sacramento River near Moon Bend at RM 141.4, just off Moon Bend Rd. 18 Comment
  UCD51776  Agrostis avenacea Beecher Crampton 1958-5-19 4822 Colusa along US Hwy. 99W, about 3 miles south of Maxwell. Comment
  UCD51793  Agrostis avenacea Beecher Crampton 1958-6-27 4985 Colusa 5 miles south of Colusa. Comment
  CHSC94403  Agrostis exarata Lowell Ahart 2006-8-9 13167 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD164139  Agrostis exarata Craig Thomsen 1997-6-21 1928 Colusa Bear Valley. About 9 miles north of Hwy 20. Near corner of sharp turn in central Bear Valley. Comment
  JEPS110386  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD162995  Aira caryophyllea Craig D. Thomsen 2000-4-12 2169 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  UCR227338  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.25 mi west of Hwy 20/16 intersection, near Colusa Co. milepost 3.0 310 Comment
  SEINET3917542  Aira caryophyllea Donald Spalinger 1974-5-4 47 Colusa St. John Mt. quad. North fork Campground on Stony Creek. 1600.; 0 Comment
  UC985647  Alisma lanceolatum Herbert L. Mason and Verne Grant 1946-9-5 13119 Colusa 1.6 mi w Williams (road to Lake County) Comment
  UC985656  Alisma plantago-aquatica Malcolm A. Nobs and S. Galen Smith 1949-9-9 1873 Colusa 3 mi w Williams Comment
  CAS-BOT-BC445355  Alisma plantago-aquatica Roxana Stinchfield 1916-7-11 469 Colusa Davis tule - Sycamore Slough Comment
  UCR200661  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch, c. 0.25 mi. south of intersection between Hwy 16 and Hwy 20, near confluence of Hamilton Flat and Jackson Canyon drainages, c. 10 meters east of Bear Creek, west of Hwy 16 Comment
  UCD137979  Alisma triviale June McCaskill; W. A. Harvey 1954-8-9 360 Colusa 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UCD141857  Allium L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD57115  Allium Gordon Harrington; Diana Hickson 2007-4-7 0019 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  CAS-BOT-BC459583  Allium amplectens Katherine Esau 1934-5-5 s.n. Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  CAS-BOT-BC459584  Allium amplectens James Jokerst 1985-4-4 2199 Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  CHSC84194  Allium amplectens Lowell Ahart 2003-7-14 10380 Colusa Along a very small drainage, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  UCD82515  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2873 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82863  Allium amplectens Gordon Harrington 2008-4-13 76 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 349 Comment
  UCD141846  Allium amplectens L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa 7.8 miles north of Leesville toward Lodoga. Comment
  UCD138461  Allium cratericola Louis K. Mann 1961-3-19 s.n. Colusa Bear Valley. 396 Comment
  UCD141844  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  UCD141847  Allium cratericola L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa south end of Bear Valley. Comment
  CHSC71009  Allium falcifolium Vernon Oswald; Lowell Ahart 1998-5-7 9009 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. 633 Comment
  CHSC90866  Allium falcifolium D. Isle 2003-6-25 217 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Rd. 16N03. 1767 Comment
  JEPS73488  Allium falcifolium L. R. Heckard 1972-7-9 3100 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2011 Comment
  UC1613362  Allium falcifolium Charles M. Belshaw April 1937 2865 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD63019  Allium falcifolium Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4671 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the west of Cowboy Camp on the west side of Bear Creek. 419 Comment
  UCD82517  Allium falcifolium Craig Thomsen; G. Harrington 2009-5-12 2875 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  RSA256672  Allium falcifolium J. L. Hobson 1974-5-4 57 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 Comment
  UCD141835  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  CAS-BOT-BC135885  Allium fimbriatum subsp. purdyi A. A. Heller 1940-5-6 15579 Colusa Summit of the grade on State Highway #20, at the Lake County line. 232 Comment
  CAS-BOT-BC135886  Allium fimbriatum subsp. purdyi James Jokerst 1985-4-5 2204 Colusa Wilbur Springs Quad., near Coyote Peak 456 Comment
  CAS-BOT-BC135888  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CAS-BOT-BC135890  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CHSC112220  Allium fimbriatum var. purdyi Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC48164  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  HSC48465  Allium fimbriatum var. purdyi J. P. Smith 1978-4-22 9744 Colusa Bear Valley Rd., 1.2 mi. from its junction with Hwy. 20 412 Comment
  JEPS120995  Allium fimbriatum var. purdyi Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  RSA32757  Allium fimbriatum var. purdyi A. A. Heller 1940-5-6 s.n. Colusa Summit of the grade on Hwy 20, at the Lake Co. line 232 Comment
  UC725425  Allium fimbriatum var. purdyi A. A. Heller 1940-5-6 15579 Colusa summit of the grade on State Highway #20, at the Lake County Line State Highway #20, Lake County Line 232 Comment
  UCD138534  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD141783  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD57626  Allium fimbriatum var. purdyi Michele Lanctot; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. 356 Comment
  UCD57822  Allium fimbriatum var. purdyi Gordon Harrington 2007-4-17 33 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  UCD66911  Allium fimbriatum var. purdyi Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and WNW of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCR198151  Allium fimbriatum var. purdyi Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3663 Colusa BLM Payne Ranch, Craig Canyon, west of Hwy 16, c. 2 road mi south of junction of Hwy 20 and Hwy 16. Along unimproved road 329 Comment
  SEINET3884500  Allium fimbriatum var. purdyi Thomas Nelson, Jane P. Nelson 1978-4-30 3972 Colusa State Route 20 just east of Colusa-Lake county line.; 0 549 Comment
  CDA11415  Allium serra G. F. Hrusa, K. van Katwyk 1995-4-22 12136 Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 m. N of Hwy 20. Comment
  CHSC42240  Allium serra Curtis Williges 1986-4-5 20 Colusa Hwy 20, 3 mi e of jct Hwy 16. 335 Comment
  CHSC79617  Allium serra B. Castro; L. P. Janeway 2000-5-3 1123 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  JEPS56391  Allium serra W. I. Follette 1935-4-1 Colusa 13.7 mi sw Williams (8.1 mi e of Colusa-Lake county line) Comment
  CAS-BOT-BC475544  Allium serra Roxana S. Ferris 1926-4-23 6429 Colusa Summit of grade on Williams-Stonyford Road Comment
  HSC71314  Allium serra Thomas W. Nelson, Jane P. Nelson 1979-4-11 4611 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  POM269061  Allium serra Lyman Benson 1933-4-16 4327 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  SEINET3880036  Allium serra D. W. McNeal 1988-3-31 3241 Colusa Dry clay soil on a grassy road bank above Hwy #116, 3.3 mi S of the jct. of Hwy #20.; 0 Comment
  UCD141825  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  RSA113928  Allophyllum divaricatum H. K. Sharsmith 1953-6-19 4280 Colusa One mile north of Trough Springs on Trough Springs Ridge. Mendocino National Forest 915 Comment
  HSC44459  Allophyllum gilioides R. York 1978-4-22 129 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC88518  Allophyllum gilioides subsp. violaceum B. Castro 2003-5-15 1438 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On steep SE-facing slope in opening above dirt rd paralleling a S-trending canyon. 195 Comment
  JEPS80819  Alnus incana subsp. tenuifolia L. R. Heckard and J. C. Hickman 1981-7-31 5790 Colusa Dark Hollow Creek Snow Mt. (e side of mt.) 1584 Comment
  JEPS108914  Alnus rhombifolia Lowell Ahart 2006-8-9 13108 Colusa Gravel bar on the north side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  UCD110005  Alnus rhombifolia G. F. Hrusa 1996-1-23 12630 Colusa Riparian area of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. 475 Comment
  UCD110026  Alnus rhombifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 128 Comment
  SEINET10510969  Alopecurus californicus Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles E of Williams. Alkali Plains. Comment
  CAS-BOT-BC137972  Alopecurus saccatus Roxana S. Ferris 1917-4-12 549 Colusa 4 miles east of Williams. Comment
  UCD55944  Alopecurus saccatus A. A. Beetle 1942-5-21 3276 Colusa 12 miles north of Williams. Comment
  UCD55965  Alopecurus saccatus G. F. Hrusa; K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges, along north side of Leesville Rd., approx. 4 m NW of Hwy. 20. 290 Comment
  UC727678  Amaranthus californicus Milo S. Baker 1946-9-5 11625 b Colusa 5 mi w Colusa (along hwy towards Williams) Comment
  CAS-BOT-BC55587  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Along Sycamore Slough. Stinchfield Ranch Comment
  CHSC61395  Ambrosia psilostachya Vernon H. Oswald; Joseph Silveira 1993-8-16 5804 Colusa Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. 24 Comment
  CAS-BOT-BC55586  Ambrosia psilostachya Milo S. Baker 1946-9-4 11591 Colusa Butte Sink, along Gridley-Princeton Road Comment
  UC1191561  Ammannia coccinea Herbert L. Mason 1945-9-19 12716 Colusa 1 mi. above Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Butte Sink, Sacramento R. Comment
  UCD127170  Ammi visnaga V. C. Bryant 1929-9-1 s.n. Colusa location unknown. Comment
  CAS-BOT-BC213951  Amsinckia Roxana S. Ferris 1926-4-23 6414 Colusa At mountain house on the Williams-Stonyford Road Comment
  RSA0090976  Amsinckia intermedia R. R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455-4th Street. 18 Comment
  SEINET7096533  Amsinckia intermedia Richard R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52 N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  HSC31598  Amsinckia intermedia Thomas E. Higley 1974-5-5 84 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  UC762196  Amsinckia lunaris R. F. Hoover 1938-4-23 3204 Colusa grade on Rumsey-Arbuckle Road Comment
  UCD80821  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5277 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 470 Comment
  CHSC107984  Amsinckia lycopsoides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1852 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Ca 250 ft SE of large +/- saline/alkaline wetland marsh. 59 Comment
  CHSC82659  Amsinckia lycopsoides Tara Morgan 2002-4-6 15 Colusa This specimen was found along Bear Valley Rd. just off of Highway 20 to the north situated north of Bear Creek. Roadside. 307 Comment
  CHSC86528  Amsinckia lycopsoides B. Castro 2003-3-18 1386 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 265 Comment
  UC1084529  Amsinckia lycopsoides Peter Kamb 1952-5-25 2291 Colusa 1 mi e Lake County line (on Hwy 20) Comment
  UC727131  Amsinckia lycopsoides A. A. Heller 1940-5-14 15620 Colusa 4 mi n Maxwell (in a field) Comment
  UCD160032  Amsinckia lycopsoides Ellen Dean; Craig Thomsen 2015-4-21 8628 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Area to the SE of Lynch Canyon on S side of undeveloped road and N of creek. Near western end of Thompson Canyon. 381 Comment
  CHSC79443  Ancistrocarphus filagineus B. Castro; L. P. Janeway 2000-5-3 1122 Colusa Vicinity of Sites, Huffmaster Rd, Antelope and Grapevine Creeks, just N of the divide between the two creeks. 414 Comment
  SEINET7075569  Ancistrocarphus filagineus A. G. Vestal 1955-4-5 s.n. Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  HSC47645  Ancistrocarphus filagineus J. P. Smith, J. O. Sawyer 1978-4-29 9791 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  CHSC76775  Androsace elongata subsp. acuta J. Marr; B. Hendrickson 1999-3-30 Colusa About 11 air miles W of Willows, vicinity of Squaw Flat and Logan Creek. 152 Comment
  CHSC79806  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2000-5-2 6693 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  JEPS82989  Angelica tomentosa L. R. Heckard 1983-7-27 6103 Colusa 2 mi w of Stonyford Road (along Little Stony Creek); Little Stony Creek 411 Comment
  SD22373  Anthemis cotula Richard Neil 1938-6-20 Colusa Grimes Comment
  UCD163218  Anthemis cotula Craig D. Thomsen 2000-5-11 2325 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD164035  Anthriscus caucalis Amber Flores 2016-4-9 1 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just west of Cowboy Camp on east side of Bear Creek. 312 Comment
  UCD83626  Anthriscus caucalis Adam Clause; with PLB 102 class 2010-5-2 5 Colusa Walker Ridge. Eaton Springs. 40 m south of the main road, on the flat valley floor at the edge of a creek. 709 Comment
  HSC38895  Anthriscus caucalis J. P. Smith 1974-5-12 7366 Colusa 3.3mi S of Princeton Comment
  JEPS15536  Antirrhinum vexillocalyculatum subsp. breweri G. Thomas Robbins with L. R. Heckard 1956-7-25 3694 Colusa about 1.5 air mi se Snow Mt. summit (on ridge above Fouts Camp and along trail to Snow Mt, on Lake-Colusa County boundary) 1920 Comment
  RSA161328  Antirrhinum vexillocalyculatum subsp. breweri Peter H. Raven, Richard Snow 1959-9-11 14420 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  CHSC94710  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  JEPS108788  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  JEPS127575  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Ranges: ~4 miles W of Stonyford; SE of curve at culvert crossing just E of old dumpsite road junction; uphill ~200' S of 18N01 in 2012 Mill Fire area chaparral. (Gilmore Peak 7.5' Quad.) Comment
  UCD123477  Antirrhinum virga A. M. Shapiro 1994-6-13 s.n. Colusa just north of Goat Mountain Rd. on Sullivan Ridge. 914 Comment
  UCR281731  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Range, c. 4 miles west of Stonyford, southeast of curve at culvert crossing just east of old dumpsite road junciton, uphill c. 200 ft south of 18N01 439 Comment
  CHSC115753  Antirrhinum virga David Isle 2015-6-20 2155 Colusa 10S -0533810E, 435732N . North Coast Range: 3.75 miles W of Stonyford and 100 yds S of road 8N01; S of Bob Angulo mobile home; on E edge of old 4x4 road/firebreak in chaparral. 427 Comment
  CHSC79556  Aphanes occidentalis B. Castro; L. P. Janeway 2000-5-4 1127 A Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  UCD64506  Aphanes occidentalis Craig D. Thomsen 2000-3-31 2093 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC101627  Apiastrum angustifolium David W. Isle 2002-4-18 1656 Colusa Mendocino National Forest; N of Fouts Springs, n of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) N aspect of E drainage in chamise site burned during 8/8/01 Trough Fire and part of Hydromulch Soil Erosion Study Plot. 524 Comment
  CHSC62836  Apiastrum angustifolium Vernon H. Oswald; Lowell Ahart 1994-3-23 6017 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. 505 Comment
  JEPS87723  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  POM129769  Apocynum cannabinum Roxana Stinchfield 1916-7-8 s.n. Colusa Stinchfield Ranch, along Sycamore Slough Comment
  CHSC48685  Aquilegia eximia Vernon Oswald 1984-7-20 1625 Colusa M10, 5.4 mi w of Rd. 306 at Stonyford. 609 Comment
  UCD64028  Aquilegia eximia Craig D. Thomsen 2000-5-11 2280 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  JEPS80780  Arceuthobium abietinum L. R. Heckard and J. C. Hickman 1981-7-30 5753 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1600 Comment
  SEINET3239841  Arceuthobium occidentale R. L. Mathiasen 2009-1 2009 -21 Colusa 3.2 km E of Summit County line at vista point on St. Rte. 20. 400 Comment
  UCR225254B  Arceuthobium occidentale Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch, several hundred feet downslope of ridge trail, along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail Comment
  UCD51019  Arctostaphylos glandulosa G. L. Webster 1989-5-6 7697 Colusa Near Border with Lake County; on Walker Ridge; near Cold Spring Mountain. Comment
  CDA16131  Arctostaphylos manzanita G. F. Hrusa 1999-2-13 14915 Colusa North Coast Ranges; along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  HSC7627  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa Road between Upper and Lower Letts Valleys 1220 Comment
  CAS-BOT-BC24380  Arctostaphylos manzanita subsp. manzanita Roxana S. Ferris 1926-4-23 6592 Colusa Near Stonyford. Comment
  CAS-BOT-BC24425  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-15 s.n. Colusa Stony Ford, nw. Colusa Co. Comment
  UCR206665  Arctostaphylos manzanita subsp. manzanita George K. Helmkamp, E. A. Helmkamp 2009-3-17 14395 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  HSC72176  Arctostaphylos viscida J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9554 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD52469  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  UCD66999  Arctostaphylos viscida Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  HSC62937  Arctostaphylos viscida Michael Dalke 1979-4-14 45 .5 Colusa 1067 Comment
  CHSC88555  Arctostaphylos viscida subsp. pulchella L. P. Janeway; B. Castro 2001-6-3 7095 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 2.7 km (air) south of Bartlett Springs Road. 799 Comment
  JEPS87758  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald and Lowell Ahart 1994-3-23 6011 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  UCD58104  Arctostaphylos viscida subsp. pulchella Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3351 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 536 Comment
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  SBBG50847  Arctostaphylos viscida subsp. viscida S. C. Schank 1960-4-10 51 Colusa above Cache Crk, 2 mi NW of jct of Hwy 16 and Hwy 20 on rd to Bear Valley Comment
  POM367485  Arctostaphylos viscida subsp. viscida Phyllis Krieg 1979-4-14 s.n. Colusa [Unspecified] 1067 Comment
  JEPS80132  Arenaria congesta var. congesta L. R. Heckard with J. Hickman 1980-7-1 5291 Colusa Trail from Summit Springs Frog Pond ((ca. 10 mi w of Stonyford)); Snow Mt. 1737 Comment
  UCD82434  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC401744  Argemone munita subsp. rotundata Volney Rattan 1884-1-1 s.n. Colusa Above Fouts Spr. Comment
  UC624278  Argemone rotundata L. Constance 1939-5-14 2490 Colusa 1 mi e of Mill Creek Ranger Station (Inner North Coast Ranges); Inner North Coast Ranges 548 Comment
  UCD34831  Aristida ternipes var. gentilis Beecher Crampton 1963-6-11 6851 Colusa Colusa County, ca. 10 miles west of Williams on Leesville road, 3 sisters Mtn. area. Comment
  CHSC86126  Aristida ternipes var. hamulosa Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  UC1040776  Aristida ternipes var. hamulosa L. T. Burcham 1955-7-5 317 Colusa 10 mi w Williams 121 Comment
  POM163496  Aristolochia californica Roxana S. Ferris 1926-4-22 s.n. Colusa Sycamore Slough near Sycamore Comment
  RSA537715  Arnica discoidea Barbara Ertter 1989-7-1 8594 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  JEPS15569  Arnica longifolia G. Thomas Robbins with L. R. Heckard 1956-7-25 3712 Colusa Snow Mt. East (s flank) Dark Hollow Creek, Snow Mt. East 1981 Comment
  CHSC84932  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  IRVC29848  Artemisia douglasiana Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4994 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  HSC45677  Asclepias cordifolia Stephen Plant 1978-4-22 215 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  HSC87000  Asclepias cordifolia Brent Helm, Curtis Miller, Mark Steiger 1988-4-16 73 Colusa 3.7 mi. W on Goat Mtn. Rd., off of Lodoga-Stonyford Rd. 452 Comment
  RSA537477  Asclepias cordifolia Barbara Ertter 1989-7-1 8603 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek, ca 12 airmiles WSW of Stonyford 1500 Comment
  POM129846  Asclepias fascicularis Roxana Stinchfield 1916-7-11 s.n. Colusa Davis Tule, near Sycamore Slough. Comment
  JEPS73499  Aspidotis densa L. R. Heckard 1972-7-10 3117 Colusa trail e of Foutch Camp Snow Mt (near Trout Creek) 1828 Comment
  JEPS95275  Aspidotis densa Vernon H. Oswald and Lowell Ahart 1994-3-23 6014 Colusa S of Stonyford (Frenzel Creek Research Natural Area, S side of Litte Stony Creek, in the section on the E side of creek) 518 Comment
  UC1049537  Astragalus breweri Rimo Bacigalupi 1950-4-16 3112 Colusa four mi s Ladoga (6 mi nnw of Leesville, in Indian Valley (not the one in Lake County) along Little Indian Creek, eastern base of Inner North Coast Ranges); eastern base Inner North Coast Ranges, Little Indian Creek 396 Comment
  CAS-BOT-BC178664  Astragalus clevelandii G. L. Stebbins 1972-6-25 8099 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  CHSC112254  Astragalus gambelianus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18633 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120976  Astragalus gambelianus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18633 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  SEINET7096743  Astragalus gambelianus A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UCD63028  Astragalus gambelianus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4680 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 510 Comment
  HSC48165  Astragalus rattanii var. jepsonianus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3929 Colusa Along Bear Valley Rd. 2 mi. from junction with State Route 20 366 Comment
  RSA475238  Astragalus rattanii var. jepsonianus Aaron Liston, Sara Meury 1988-5-31 751 -1 Colusa Bear Valley; 8.1 miles N of Hwy 20. 400 Comment
  SEINET4310286  Astragalus rattanii var. jepsonianus R. R. Halse 2013-3-27 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of the junction of State Hwys. 20 and 53 558 Comment
  UCD56917  Astragalus rattanii var. jepsonianus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3520 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  UCD81231  Astragalus rattanii var. jepsonianus Ellen Dean; K. Mawdsley, B. Rice 2009-5-6 5568 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. Along Bear Creek south of Brophy Canyon, near old access road that leaves Hwy. 16 near milepost 6. 224 Comment
  UCD81236  Astragalus rattanii var. jepsonianus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5400 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 224 Comment
  UCR212345  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UC82603  Astragalus tener var. ferrisiae Katharine Brandegee May 1884 Colusa Mountain House (=Mountain Home road sta.) Comment
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Feb 28 2006
  JEPS80461  Athyrium filix-femina var. cyclosorum Alice Q. Howard 1972-7-10 Colusa trail from Fouts Camp to Box Springs (n side of ridge seaprating Trout and Paradise Creeks); Snow Mt 1676 Comment
  CAS-BOT-BC17401  Athysanus pusillus Roxana S. Ferris 1917-4-14 551 Colusa Foothills 7 miles west of Arbuckle. Arbuckle-Rumsey Road. Comment
  CHSC87153  Athysanus pusillus Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  UCD165928  Athysanus pusillus Ellen Dean; with T. Starbuck and D. McNair 2016-4-9 8833 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Southwest of intersection of Highway 20 and Highway 16. Near corral at Highway 20. 479 Comment
  UCR256431  Athysanus pusillus Richard R. Halse 2013-3-27 8763 Colusa along State Hwy 20 just east of the Colusa/Lake Co. line, c. 14.6 mi east of the junction of State Hwys 20 and 53 558 Comment
  UCSC010467  Athysanus pusillus Dylan M. Neubauer, Tim Forsell 2016-3-31 596 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  CAS-BOT-BC170615  Atriplex argentea Roxana Stinchfield 1916-7-1 462 Colusa Colusa - Williams Road, at bridge over the Trough Comment
  UCR205145  Atriplex argentea George K. Helmkamp, E. A. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCR225453  Atriplex argentea Craig D. Thomsen, Gordon Harrington 2008-7-6 2783 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond c. 0.2 miles to the south of the Roadkill cafe. 396 Comment
  UCD66916  Atriplex argentea var. expansa Craig D. Thomsen; G. Harrington 2008-7-6 2783 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond ca. 0.2 miles to the south of Roadkill Cafe. 396 Comment
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Jun 8 2011
  CHSC94745  Atriplex argentea var. mohavensis Lowell Ahart 2006-9-26 13346 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  RSA670513  Atriplex cordulata Stan C. Spencer 2002-8-8 unnumbered Colusa ca. 3-6 miles E of Colusa, along California Highway 20. Comment
  CHSC83637  Atriplex fruticulosa L. P. Janeway 2002-4-25 7524 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 Comment
  CHSC83634  Atriplex joaquinana L. P. Janeway 2002-4-25 7526 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 Comment
  UCD163708  Atriplex joaquinana Craig Thomsen 1999-5-10 2020 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD97461  Atriplex joaquinana A. A. Heller 1916-6-9 12394 Colusa near Williams. Comment
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC40790  Atriplex semibaccata J. Burtt Davy May 1898 4287 Colusa Maxwell Comment
  HSC45723  Avena barbata Catherine Chin 1978-4-22 27 Colusa Bear Valley Rd., 1.5 miles from its junction with State Rte. 20 412 Comment
  UCD65636  Avena barbata Craig D. Thomsen 2000-4-12 2148 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC86015  Avena fatua Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  HSC66008  Avena fatua Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 43 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UCD66443  Avena fatua Craig D. Thomsen 2000-4-28 2212 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD82112  Avena fatua Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5640 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS113773  Azolla filiculoides Lowell Ahart 2007-7-7 14260 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  CHSC46039  Azolla microphylla Lowell Ahart 1975-1-25 699 Colusa On the south side of Norman Road, about 1 mile west of Princeton. 30 Comment
  UCD66921  Baccharis pilularis Craig D. Thomsen; G. Harrington 2008-7-6 2778 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  CHSC98782  Baccharis salicifolia Richard R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. Along Salt Creek. 100 Comment
  UC1585403  Balsamorhiza macrolepis R. Raiche 1989-5-23 90133 Colusa w of, n of Wilber Springs, se end of Walker Ridge, Sulpher Creek Drainage Williams; Sulpher Creek Drainage 610 Comment
  UCD74309  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  UCD82368  Balsamorhiza macrolepis Robin McMaster 1973-4-15 338 Colusa Bartlett Springs. Comment
  CHSC69867  Balsamorhiza macrolepis var. macrolepis B. Castro; B. Corbin, K. Earll, L. Hanson, D. Isle, L. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and Walker Ridge Rd. (Site is a few hundred feet E of Lake Co. line.) 716 Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  CHSC69476  Bassia hyssopifolia James D. Jokerst 1988-8-23 3041 Colusa Colusa National Wildlife Refuge S of Willows, in Pond 3, E and adjacent to Ohm Rd. in southern-most cell E of the road. Comment
  UCD38965  Bassia hyssopifolia Beecher Crampton 1961-7-20 5934 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  HSC90794  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of E Park Reservoir N of Lodoga 366 Comment
  CDA38638  Boehmeria cylindrica Dave Brown 2012-9-12 PDR# 060 P06089084 Colusa Colusa; Sacramento River Recreation Area. 0 Comment
  SEINET8354595  Bolboschoenus fluviatilis David B. Marshall 1954-7-20 Colusa Colusa National Wildlife Refuge. Comment
  CHSC76535  Bolboschoenus glaucus Heidi West; Caroline Warren, Jenny Marr, Natalie Wight 1998-7-22 Colusa Vicinity of Logan Ridge, Funks Creek, and Hunters Creek. 121 Comment
  CHSC80474  Bolboschoenus glaucus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  UCD67058  Bolboschoenus maritimus subsp. paludosus Craig D. Thomsen 2008-5-23 2755 Colusa BLM Payne Ranch. Destanella Flat, just south of Hwy 20, 2.5 miles west of Hwy 16. 522 Comment
  CAS-BOT-BC418409  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCR206359  Brassica George K. Helmkamp, E. A. Helmkamp 2009-3-11 14384 Colusa Sacramento Valley, along CA-20 at Lone Star Road, northeast of Williams 13 Comment
  UCD61436  Brassica nigra Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3881 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCD55472  Brickellia californica Ellen Dean; Gordon Harrington 2006-10-6 3296 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  SEINET10965888  Brodiaea elegans Katherine L. Morris 1973-6-6 Morris 388 Colusa Chaparral woodland and sparse oaks; on hwy. 20, .3 Miles e of lake county line Comment
  CHSC89838  Brodiaea elegans subsp. elegans B. Castro; L. Janeway 2001-5-10 1248 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge. 396 Comment
  POM169614  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa Near College City. Comment
  UC1051716  Brodiaea elegans subsp. elegans Helen K. Sharsmith 1953-6-19 4268 Colusa near confluence of North and Middle Forks of Stoney Creek; Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  CAS-BOT-BC482891  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa near College City Comment
  CAS-BOT-BC484269  Brodiaea elegans subsp. elegans Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley, along road to Bartlett Springs Comment
  CHSC112309  Bromus arenarius Lowell Ahart 2013-5-1 18685 Colusa Inner North Coast Range. In a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD37179  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Colusa County, 12 miles northwest of Rumsey, along Highway 16. Comment
  UCD57578  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Along State Hwy. 16. 12 miles northwest of Rumsey. Comment
  UCD81887  Bromus carinatus Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5771 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Southern portion of Lynch Canyon, just S of building known as Roadkill Cafe. Along Thompson Creek, E of road crossing. 423 Comment
  JEPS80216  Bromus carinatus var. carinatus L. R. Heckard and J. Hickman 1980-7-3 5372 Colusa near Summit Springs (sw slope of Snow Mountain); Snow Mountain 1554 Comment
  RSA163468  Bromus diandrus Roxana S. Ferris 1926-4-21 6217 Colusa On Sycamore slough, 2 miles from Sycamore Comment
  UCD57551  Bromus diandrus Cindy Yip; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  CAS-BOT-BC155497  Bromus hordeaceus Roxana S. Ferris 1917-4-17 613 Colusa Sycamore Slough. Comment
  CHSC6680  Bromus hordeaceus Marilyn Lee 1968-4-30 168 Colusa North side of Hwy. 16, intersection of Hwy. 16 and Hwy. 20, between Hwy. and Cache Creek. Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 Comment
  UCD37832  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. Comment
  UCD58884  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa Inner North Coast Ranges. Mendocino National Forest. Red Bridge Camp. Near confluence of North and Middle forks of Stoney Creek. 548 Comment
  HSC45668  Bromus madritensis subsp. rubens Stephen Plant 1978-4-22 214 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SEINET244463 Image available Bromus rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  UC1563843  Cacaliopsis nardosmia Barbara Ertter 1989-7-1 8595 Colusa road to Goat Mt. Lookout 2.2 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd) (at head of creek, ca 12 airmiles wsw of Stonyford); S Fork Stony Creek 1500 Comment
  UC1543199  Cacaliopsis nardosmia Donald G. Nelson et. al. 1940-6-8 680 Colusa western boundary of county Snow Mountain 2150 Comment
  CAS-BOT-BC438309  Calandrinia ciliata Roxana S. Ferris 1917-4-12 535 Colusa 4 miles east of Williams Comment
  HSC72159  Calandrinia ciliata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9534 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SEINET3872957  Calandrinia ciliata Richard R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca 10 miles north of Colusa (junction of State Hwys. 45 & 20).; 0 22 Comment
  UCD163689  Calandrinia ciliata Craig Thomsen 1999-4-15 1991 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC72115  Calandrinia ciliata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9530 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  SD149215  Calandrinia ciliata Hershkovitz 1991-5-3 Colusa Walker Ridge, along Walker Ridge Road near turn-off to Bear Valley on north end. Comment
  UCD57052  California macrophylla Gordon Harrington; Diana Hickson 2007-4-7 0011 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. Comment
  UCR198059  Calochortus amabilis E. Jacqueline Garcia 1986-4-13 s.n. Colusa Bear Valley, 2.6 mi west of the junction of Bear Valley Road and Bartlett Springs Road, on Bartlett Springs Road 664 Comment
  CAS-BOT-BC492117  Calochortus amabilis F. P. Cronemiller 1924-5-10 875 Colusa Mill Creek Ranger Station 609 Comment
  UC1733772  Calochortus luteus Kay H. Beach 1940-5-16 659 Colusa Colusa and Lake county line Comment
  UCD139532  Calochortus luteus K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  CAS-BOT-BC491930  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  RSA601304  Calochortus luteus Jens Clausen 1935-5-20 1011 Colusa 18 mi W of Williams on Bartlett Springs Road. Past the Stonyford road. Comment
  CDA15475  Calochortus splendens G. F. Hrusa, WTD 1998-6-19 14612 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC2243  Calochortus splendens D. Smith 1935-5-12 Colusa Stonyford Hills. Comment
  CHSC79620  Calochortus splendens G. F. Hrusa 1998-6-19 14612 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  UC1562598  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UCD82156  Calochortus splendens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UC1051720  Calochortus splendens Helen K. Sharsmith 1953-6-19 4276 Colusa e slope Snow Mountain (on Bonny Doon road); Inner North Coast Ranges, Mendocino National Forest 670 Comment
  UC1051717  Calochortus superbus Helen K. Sharsmith 1953-6-19 4269 Colusa near North and Middle Forks of Stony Creek confluence; Inner North Coast Ranges, Mendocino National Forest 548 Comment
  CAS-BOT-BC132571  Calochortus uniflorus Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley nr. Leesville 304 Comment
  HSC45509  Calochortus uniflorus M. Alcasas 1978-4-23 59 Colusa Bear Valley Rd., 4.7 mi. from Bartlett Springs Rd. 457 Comment
  SEINET8197768  Calochortus uniflorus W. Roderick 1967-5-7 s.n. Colusa Bear Valley. 305 Comment
  SEINET8369630  Calochortus uniflorus Christine C. Lorain 1993-4-20 2235 Colusa 7.1 mi s of Leesville alogn Bear Valley Road near shart 90o turn in road (cattle yard). 427 Comment
  HSC65993  Calochortus vestae D. Boyd, M. Eichelberger, Tim Messick, Tom Ranker 1980-4-20 46 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  UCR212336  Calycadenia fremontii Craig D. Thomsen 2000-6-23 2401 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.25). 342 Comment
  CAS-BOT-BC270758  Calycadenia pauciflora K. C. 1884-7-1 s.n. Colusa Mountain House Comment
  RSA255585  Calycadenia pauciflora Gerald D. Carr 1972-6-14 703 Colusa At the Lake County line on Hwy. 20 Comment
  UC1552845  Calycadenia pauciflora Frederica Bowcutt 1985-6-19 605 Colusa just sw, n of Wilbur Hot Springs about 2 air miles Bear Valley Comment
  UCD70217  Calycadenia pauciflora D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine annual grasslands in serpentine chaparral edges. 370 Comment
  UCD84638  Calycadenia pauciflora G. Harrington 2009-7-7 85 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  UCR200665  Calycadenia pauciflora Craig D. Thomsen 2008-5-23 2737 Colusa BLM Payne Ranch, southwest of intersection between Hwy 16 and Hwy 20, 0.5 mile south of Hwy 20 (south of Destanella Flat), c. 2.5 miles west of Hwy 16 542 Comment
  CAS-BOT-BC270744  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles E of Walker Ridge Road on Deadshot Road, Deadshot Flat 731 Comment
  CAS-BOT-BC270751  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles N of Yolo County line on Highway 16 Comment
  CAS-BOT-BC270752  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa Bear Valley Road, 0.1 mile N of junction with Brim Road (to Bartlett Springs), ca. 2 miles SW of Leesville Comment
  CAS-BOT-BC270755  Calycadenia pauciflora Alice Eastwood 1919-6-8 13230 Colusa Near Ladoga Comment
  RSA255613  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles southwest of Leesville on Bartlett Spr. Road 518 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  UC1876227  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 mi N of Hwy 20 on Bear Valley Rd., along banks of Bear Cr. Comment
  UC1876245  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 mi S of Bartlett Springs Rd. on Walker Ridge Rd., Buck Flat. 868 Comment
  UC1876260  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 mi W of Stoneyford on road to Fout Spring. 609 Comment
  UC1876262  Calycadenia pauciflora Gerald D. Carr 1971-7-23 605 Colusa 1.7 mi W of Lodoga on road to Stoneyford. 411 Comment
  UC1876635  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 mi SW of Leesville on road to Bartlett Spr. Rd. 518 Comment
  UC1971691  Calycadenia pauciflora 1978-8-20 2156 Colusa Bear Valley Road, 0.1 mi N of jct with Brim Road (to Bartlett Springs), ca. 2 mi SW of Leesville (=GDC 651) 482 Comment
  UC1971710  Calycadenia pauciflora 1978-8-20 2155 Colusa Brim Road (to Bartlett Springs), 1.5 mi W of jct with Bear Valley Road, ca. 3.6 mi SW of Leesville (=GDC 652) 482 Comment
  UCD129840  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 miles west of Leesville-Lodoga Road on road to Cook's Springs. Comment
  UCD129870  Calycadenia pauciflora R. L. Carr 1978-8-20 2155 Colusa Brim Road (to Bartlett Spring), 1.5 miles west of junction with Bear Valley Road, around 3.6 miles southwest of Leesville. 482 Comment
  UCD67591  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa Along Fouts Spring Rd., 2.8 miles W of Stonyford, along roadside. Growing along small stream, soil dry. Large shrub, ca. 10 ft tall, flowers large, reddish. Comment
  UCR228284  Calycanthus occidentalis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4955 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 437 Comment
  UC1299369  Calyptridium monospermum Freed W. Hoffman 1948-6-26 2512 Colusa western Goat Mountain Goat Mountain Comment
  UCD82524  Calyptridium quadripetalum Craig Thomsen; G. Harrington 2009-5-12 2881 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  RSA0059895  Calystegia collina subsp. collina Gloria R. Campbell 1948-6-18 653 Colusa 2 miles west of junction of Highways 16 and 20. Comment
  JEPS81301  Calystegia occidentalis subsp. occidentalis L. R. Heckard and J. C. Hickman 1982-7-5 5915 Colusa slope below Summit Springs, S side Snow Mountain Comment
  UCD81718  Calystegia occidentalis subsp. occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5723 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  RSA0059884  Calystegia subacaulis Lloyd Simpson 1977-4-24 290 Colusa Along Walker Ridge Road above Barrel Springs Campground. 701 Comment
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  CHSC79775  Camissonia contorta L. P. Janeway; B. Castro 2000-5-4 6704 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  HSC83363  Camissonia graciliflora Eugene Tanimoto 1975-4-20 17 Colusa Bear Valley Rd., 8.7 mi. N of intersection with Hwy. 20 Comment
  UCD82382  Camissoniopsis intermedia Craig Thomsen; G. Harrington 2009-5-12 2823 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  UCD165932  Campanula griffinii Ellen Dean; with Tom Starbuck 2016-4-24 8843 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  UCR206868  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14315 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CHSC62923  Cardamine oligosperma Vernon H. Oswald; Lowell Ahart 1994-4-6 6056 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 463 Comment
  CHSC115615  Carduus pycnocephalus subsp. pycnocephalus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2153 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  CDA15499  Carex G. F. Hrusa, T. D. Wilfred 1998-6-19 14636 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  SEINET10644548  Carex Roxana S. Ferris 1917-4-17 Ferris 607 Colusa Moist earth in an oak grove. Sycamore Slough. Comment
  JEPS75133  Carex athrostachya L. R. Heckard 1972-7-8 3040 Colusa N side Snow Mountain (West Peak) 2011 Comment
  JEPS80862  Carex aurea L. R. Heckard and J. C. Hickman 1981-7-30 5744 Colusa Trout Creek Trail, se slope of Snow Mt. Snow Mt., Trout Creek Trail 1661 Comment
  UC596489  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek Comment
  JEPS80868  Carex bolanderi L. R. Heckard and J. C. Hickman 1981-7-31 5796 Colusa Dark Hollow Creek, E side of Snow Mountain 1584 Comment
  JEPS80035  Carex densa L. R. Heckard and R. Bacigalupi 1976-9-6 4426 Colusa Along trail from Summit Springs to Fouts Camp, Snow Mountain. Comment
  JEPS101036  Carex deweyana subsp. leptopoda Dean W. Taylor 1992-6-10 12699 Colusa Highway 162, Alder Springs Road, ca. 2 miles west from junction with Grindstone Road, 1371 Comment
  CDA15482  Carex feta G. F. Hrusa, T. D. Wilfred 1998-6-19 14619 Colusa North Coast Ranges; Wet area on spring in +- shaded understory of Pinus ponderosa, Abies concolor forest along Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). Short-rhizomatous perennial. Comment
  UC1563913  Carex fracta Barbara Ertter 1989-7-1 8610 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 Comment
  CAS-BOT-BC28168  Carex hoodii L. R. Heckard 1972-7-10 3114 Colusa Trout Creek crossing of trail to Box Spring, Snow Mt. Comment
  JEPS75123  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa ne slope of West Peak Snow Mt., West Peak 2072 Comment
  JEPS80378  Carex jonesii L. R. Heckard and J. Hickman 1981-6-22 5611 Colusa s side of east ridge of East Peak Snow Mt., East Peak 1950 Comment
  CAS-BOT-BC35776  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa Snow Mt.;northeast slope of West Peak 2072 Comment
  UCD61461  Carex praegracilis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3907 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCD63112  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4943 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 384 Comment
  CAS-BOT-BC118348  Carex praegracilis Roxana S. Ferris 1917-4-17 625 Colusa Under trees, Sycamore Slough. Comment
  UCD140770  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82514  Carex serratodens Craig Thomsen; G. Harrington 2009-5-12 2872 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82720  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS80860  Carex subfusca L. R. Heckard and J. C. Hickman 1981-7-30 5740 Colusa along Trout Creek trail, se side of Snow Mt. Snow Mt., Trout Creek trail 1676 Comment
  CDA15498  Carex tumulicola G. F. Hrusa, T. D. Wilfred 1998-6-19 14635 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  CHSC92497  Carex tumulicola G. F. Hrusa; WTD 1998-6-19 14635 Colusa Occasional on stream/seep near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. 1710 Comment
  CHSC71000  Castilleja applegatei subsp. martinii Vernon Oswald; Lowell Ahart 1998-5-7 8995 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  CHSC88871  Castilleja applegatei subsp. martinii Christine Hantelman 2000-4-1 46 Colusa At side of Bear Valley Road. 365 Comment
  JEPS124243  Castilleja applegatei subsp. martinii Lowell Ahart 2015-4-10 20013 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  JEPS73456  Castilleja applegatei subsp. pinetorum L. R. Heckard 1972-7-8 3058 Colusa Dark Hollow Creek, upper reaches, in saddle between East and West Peaks of Snow Mountain Snow Mountain 1981 Comment
  JEPS81324  Castilleja applegatei subsp. pinetorum L. R. Heckard and J. C. Hickman 1982-7-6 5939 Colusa slope 1/2 mi NE of Summit Springs (E of trail); Snow Mountain, S side 1645 Comment
  CHSC115341  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa Normal size plants, on dark damp soil, along the south edge of Leesville Road. 445 Comment
  UCD56924  Castilleja attenuata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3527 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CHSC27537  Castilleja exserta Greg C. Halcomb 1978-4-9 12 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CDA32834  Castilleja exserta P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  RSA794941  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2011-4-1 17125 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UCR47925  Castilleja exserta subsp. exserta Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 mi north of State Hwy 20 Comment
  CHSC82623  Castilleja foliolosa Tara Morgan 2002-4-1 24 Colusa Found on the side of Bear Valley Rd. located northeast of Bear Creek, south of Bear Valley. 350 Comment
  RSA589920  Castilleja foliolosa Michael A. Vincent, Robert M. Rhode 1996-3-30 7297 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  HSC97523  Castilleja foliolosa Maria-Elena Heizen 2001-4-21 25 Colusa Walker Ridge 671 Comment
  HSC99291  Castilleja foliolosa J. Carey, A. Hong, J. Leffingwell 1995-4-1 25 Colusa Brim Rd., 1.6 mi. W of junction with Bear Valley Rd. 488 Comment
  JEPS80826  Castilleja miniata L. R. Heckard and J. C. Hickman 1981-7-31 5798 Colusa e side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1615 Comment
  HSC45508  Castilleja rubicundula subsp. lithospermoides M. Alcasas 1978-4-23 60 Colusa Bear Valley Rd., 4.7 mi. from Barlett Springs Rd. 457 Comment
  JEPS33902  Castilleja rubicundula subsp. rubicundula D. E. Breedlove 1963-5-30 5183 Colusa 17 mi e Bartlett Springs (on floor of Bear Valley); Bear Valley Comment
  JEPS44112  Castilleja rubicundula subsp. rubicundula Barrie Stanfield 1966-4-16 27 Colusa 5 mi n Wilbur Springs turnoff (Bear Valley bottomlands); Bear Valley Comment
  JEPS74818  Castilleja rubicundula subsp. rubicundula L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-8 4026 Colusa 6 mi n (by road) Wilbur Springs junction; Bear Valley 365 Comment
  UC1282150  Castilleja rubicundula subsp. rubicundula Annetta Carter and Louise Kellogg 1953-6-20 3239 Colusa 6 mi n Wilbur Springs Junction (road to Leesville); Inner North Coast Ranges 400 Comment
  UC1745724  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1395 Colusa Bear Creek Canyon, 4.4 mi. SE of Wilbur Springs. Comment
  UC584134  Castilleja rubicundula subsp. rubicundula J. Clausen 1935-5-20 1018 Colusa ca 27 mi w Williams (past the Wilbur Springs road, along Bear Creek); Bear Creek Comment
  UCD63036  Castilleja rubicundula subsp. rubicundula Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4882 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Across Bear Creek from Cowboy Camp. 318 Comment
  UCD56927  Caulanthus flavescens Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3530 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Saddle between Craig and Thompson Canyons. 394 Comment
  CAS-BOT-BC40505  Caulanthus lasiophyllus Roxana S. Ferris 1926-4-22 6289 Colusa Tule land 3 miles west of Colusa. Comment
  UCD170130  Caulanthus lasiophyllus Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  JEPS73517  Ceanothus cordulatus L. R. Heckard 1972-7-10 3136 Colusa between Foutch Camp and Trout Creek crossing (Snow Mt.); , between Foutch Camp and Trout Creek crossing 1828 Comment
  CHSC22526  Ceanothus cuneatus Robert A. Schlising; Glenn Keator 1962-1-21 2032 Colusa Steep adobe bank and open hills. 548 Comment
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Mar 26 2014
  HSC98203  Ceanothus cuneatus Steven Lagos 1974-5-4 50 Colusa 915 Comment
  UCR206372  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14369 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UC2014137  Ceanothus integerrimus Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Along Walker Ridge Road, between Cold Spring and Buck Flat. Comment
  UCD110813  Ceanothus jepsonii Christopher Mallek 2008-1 PR1- 2 Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD112067  Ceanothus jepsonii D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  UCD56772  Ceanothus jepsonii Sam Bledsoe 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 569 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  CHSC105194  Ceanothus jepsonii var. albiflorus B. Castro; L. P. Janeway 1999-7-5 1016 A Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  CHSC93619  Ceanothus jepsonii var. albiflorus C. L. Schmidt 1989-6-13 1253 Colusa 1 mile up dirt road to Trout Creek near Davis Campsite and Fouts Springs Campground ca. 9 mi W of Stonyford; on E side of Snow Mountain. 600 Comment
  UCD81261  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5426 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  SEINET11587777  Centaurea melitensis Unknown 2009-5-20 14758 Colusa Colusa County Comment
  UCD82113  Centaurea melitensis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5641 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD57443  Centaurea solstitialis Gina Darin; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  UCR201558  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14255 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  POM53290  Centaurea solstitialis W. R. Mumma 1897-9-3 s.n. Colusa Grand Island Comment
  SEINET10798227  Centaurea solstitialis Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 376 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UCD55450  Centromadia fitchii Ellen Dean; Gordon Harrington 2006-10-6 3275 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCD66949  Centromadia fitchii Ellen Dean; Davis Botanical Society 2008-5-31 4994 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD163657  Centromadia parryi subsp. parryi Craig Thomsen 1998-6-10 1955 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD61446  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3891 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  UCD63776  Centromadia parryi subsp. parryi Craig D. Thomsen 2008-5-31 2757 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  CHSC80151  Centromadia parryi subsp. rudis B. Castro; G. Kuenster 2000-7-19 1203 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 41 Comment
  CHSC84391  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  JEPS104140  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, ca 1 mi sw of Williams. 27 Comment
  CAS-BOT-BC279211  Centromadia pungens subsp. pungens R. F. Hoover 1936-5-22 1218 Colusa Williams Comment
  UC894340  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 197 Colusa near Colusa Comment
  CAS-BOT-BC279207  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  CAS-BOT-BC279212  Centromadia pungens subsp. pungens David D. Keck 1933-5-30 2402 Colusa 1.8 miles west of Colusa on road to Williams Comment
  UC1299375  Cephalanthera austiniae Freed W. Hoffman 1948-6-27 2525 Colusa 8.6 mi. s.w. Fouts Springs (Upper Letts Valley); w. Colusa Co., Upper Letts Valley 1310 Comment
  JEPS80442  Cerastium glomeratum L. R. Heckard and J. Hickman 1980-7-3 5372 A Colusa s.w. slope of Snow Mt. (about Summit Springs) 1554 Comment
  UCD163000  Cerastium glomeratum Craig D. Thomsen 2000-3-31 2164 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD81246  Cerastium glomeratum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5410 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  UCD137756  Ceratophyllum demersum J. S. Jones 1926-7-16 s.n. Colusa Colusa. Comment
  HSC31623  Cercis occidentalis Glenn McGourty 1974-4-20 7 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
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Aug 13 2014
  UC1543231  Cercis occidentalis Donald G. Nelson, et al. 1940-6-9 692 Colusa Happy Creek Camp Paradise Creek (nw corner of county, creek empties into middle fork of Stony Creek) 731 Comment
  UCD56914  Cercis occidentalis Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3517 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  CDA12800  Cercocarpus betuloides G. F. Hrusa 1996-2-26 12635 Colusa Inner North Coast Ranges; On E side of ridge separating Blanchard Valley from Bear Valley, on Leesville Rd. Comment
  CDA15468  Cercocarpus betuloides G. F. Hrusa, WTD 1998-6-19 14605 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. Comment
  RSA590197  Cercocarpus betuloides Michael A. Vincent, Robert M. Rhode 1996-3-30 7299 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  UCD58111  Cercocarpus betuloides Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3375 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. East of Destanella. 576 Comment
  UCD70292  Cercocarpus betuloides var. betuloides D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 450 Comment
  HSC45751  Chaenactis glabriuscula var. glabriuscula Sheila Logan 1978-4-22 82 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC725604  Chaenactis glabriuscula var. heterocarpha A. A. Heller 1940-5-6 15580 Colusa a few yards e of the Lake County line 232 Comment
  JEPS104407  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2003-10-23 10665 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  UC525846  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 566 Colusa 5 mi s Stonyford; Big Stony Creek 243 Comment
  UC535095  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Creek Lodoga Comment
  UC73410  Chamaesyce serpyllifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS75724  Cheilanthes gracillima L. R. Heckard 1974-9-9 3859 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt 1828 Comment
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC77561  Chenopodium album Heidi West; Jenny Marr, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Salt Lake and Sites. 97 Comment
  JEPS108912  Chenopodium botrys Lowell Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  RSA700362  Chenopodium californicum B. Castro 2003-3-18 1385 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, in SSW-facing draw on 40 deg slope. Comment
  CAS-BOT-BC184905  Chloris virgata Margaret J. Williams 1981-9-2 81 -162 Colusa On Wisconsin Avenue, south of Arbuckle. Comment
  UCD37706  Chloris virgata Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  CHSC32967  Chorizanthe membranacea C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 52 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  CHSC92836  Chorizanthe membranacea D. Isle 2000-6-7 1244 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. 50 yards west of Little Stony Road (42). 382 Comment
  CDA15502  Cirsium cymosum G. F. Hrusa, WTD 1998-6-19 14641 Colusa North Coast Ranges; Below Fouts Springs on Fouts Springs Rd. to Stonyford. About 0.25 km. NE of where Candy Bucket Spring crosses rd. Comment
  UCD159331  Cirsium cymosum D. S. Park 2010-6-5 115 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD165930  Cirsium cymosum Ellen Dean; with Tom Starbuck 2016-4-24 8841 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 391 Comment
  CDA1157  Cirsium cymosum T. C. Fuller 1958-5-27 3667 -A Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS81288  Cirsium cymosum var. cymosum L. R. Heckard and J. C. Hickman 1982-7-5 Colusa s side Snow Mt. (Summit Springs, slope below (s of) area); , Summit Springs 1500 Comment
  UCD159335  Cirsium douglasii var. breweri D. S. Park; E. Dean 2010-6-5 119 Colusa Walker ridge, Cold Spring Mt. 886 Comment
  CAS-BOT-BC286379  Cirsium occidentale var. venustum Roxana S. Ferris 1926-4-23 6459 Colusa On Stony Creek Comment
  CAS-BOT-BC162597  Clarkia affinis C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-29 35 Colusa Bear Valley Rd., 2 mi. N of Hwy 20 365 Comment
  UCD104016  Clarkia affinis Grady L. Webster 1977-5-15 7682 Colusa Along Bear Creek, ca. 2 mile W of Route 20 along Wilbur Springs Road. 365 Comment
  CAS-BOT-BC160914  Clarkia amoena subsp. amoena C. Hart Merriam 1923-1-1 s.n. Colusa Indian rancheria, Stony Ford Comment
  CAS-BOT-BC164150  Clarkia concinna Peter H. Raven 1962-5-31 17909 Colusa State Highway 20, 2.5 miles east of Lake County line Comment
  CAS-BOT-BC164147  Clarkia concinna Richard R. Halse 1989-5-7 3827 Colusa Along the Leesville Road, 3 miles southeast of Leesville, just below the summit of the pass on the east side 480 Comment
  JEPS43608  Clarkia concinna subsp. concinna W. L. Jepson 1920-5-23 8973 Colusa hills between Bear Valley and Stanton Valley Comment
  RSA163460  Clarkia concinna subsp. concinna Roxana S. Ferris 1926-4-23 6408 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  SJSU11006  Clarkia concinna subsp. concinna J. B. Willis Jr 1969-5-31 200 Colusa by State Hwy 20, 0.5 mi W of junction with Hwy16 c. midway between Williams & Clear Lake Comment
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Aug 26 2011
  LA45424  Clarkia gracilis subsp. albicaulis G. L. Stebbins Jr.; Malcolm A. Nobs, J. A. Rattenbury 1947-4-27 3755 Colusa 3 mi. W of Leesville, on road to Bartlett Springs Comment
  RSA151824  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa Near Cooks Creek, about 1/4 mile east of Cooks Springs Comment
  CHSC89885  Clarkia gracilis subsp. gracilis B. Castro; Shirley Innecken 2001-4-27 1240 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. Adjacent to dirt road paralleling N-S-trending creek. In opening on low terrace. 332 Comment
  RSA41127  Clarkia gracilis subsp. gracilis Robert F. Hoover 1938-4-24 3231 Colusa Stone Corral Canyon below Sites. Comment
  CHSC79535  Clarkia modesta B. Castro; L. P. Janeway 2000-5-2 1105 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  SEINET8726150 Image available Clarkia purpurea Helen K. Sharsmith 1953-1 s.n. Colusa Above Mill Creek near Fouts Springs, Mendocino National Forest, altitude 2000 feet. 610 Comment
  CAS-BOT-BC163405  Clarkia purpurea subsp. quadrivulnera Roxana Stinchfield 1916-6-18 303 Colusa Near College City Comment
  UCD66864  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5067 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  SEINET9368255  Clarkia unguiculata Unknown 2009-5-20 14738 Colusa Glasscock Mountain Comment
  CDA14915  Claytonia exigua G. F. Hrusa 1993-5-2 10855 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Mouth of Frenzel Creek. Comment
  CHSC69690  Claytonia exigua subsp. exigua Vernon Oswald 1984-5-2 1172 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18n01) 11.9 mi w of Stonyford. Growing in gravel on a road cut. 868 Comment
  CHSC86514  Claytonia exigua subsp. exigua B. Castro 2003-3-17 1383 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  JEPS124232  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  JEPS95503  Claytonia exigua subsp. exigua Vernon H. Oswald 1994-3-23 6015 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. Occasional populations in serpentine soil of brushy and rocky slopes. 518 Comment
  UCD66462  Claytonia exigua subsp. exigua Craig D. Thomsen 2001-4-12 2457 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS86633  Claytonia exigua subsp. exigua L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6693 Colusa w of Summit Springs (near road, sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1550 Comment
  RSA614426  Claytonia exigua subsp. exigua K. L. Chambers 1988-3-24 5405 Colusa Hwy 20., ca. 22 mi. west of Williams, Inner Coast Range. Comment
  UC1051500  Claytonia exigua subsp. exigua Helen K. Sharsmith 1953-6-19 4281 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  UCD67063  Claytonia parviflora Craig D. Thomsen 2008-3-20 2717 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 450 Comment
  UCD82628  Claytonia parviflora Craig Thomsen; G. Harrington 2009-5-12 2900 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD82629  Claytonia parviflora Craig Thomsen; G. Harrington 2009-5-12 2901 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  CHSC101069  Claytonia parviflora subsp. parviflora David W. Isle 2002-4-18 1654 Colusa N of Fouts Springs, N of Chlorinator Building and Rd to Bathhouse Trail (Snow Mtn), N aspect of E drainage. In chamise site burned in 8/8/01 Trough Fire and part of Hydromulch Soil Erosion Study Plot. 524 Comment
  CHSC91018  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. Comment
  CHSC91069  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 181 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. So. of Bathhouse Trail Rd. 17N51, no. of Fonts Springs. 548 Comment
  RSA755471  Claytonia parviflora subsp. parviflora David W. Isle 2002-4-18 1654 Colusa North of Fouts Springs, North of Chlorinator Building and Road to Bathhouse Trail (Snow Mountain). North aspect of east drainage. 524 Comment
  UC2016506  Collinsia Richard Olmstead 1986-6-18 875 Colusa In openings of red fir woods, just north of Crooked Tree Ridge col Comment
  CHSC25076  Collinsia grandiflora S. R. Poe 1974-3-30 27 Colusa Occuring frequently in open grassy fields, 22.5 mi. w of Williams, adjacent to highway 20. 243 Comment
  CHSC55589  Collinsia grandiflora Jennie J. Dubose 1991-4-6 20 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC1731  Collinsia heterophylla V. Holt 1946-4-18 Colusa Cashe Creek. Comment
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Mar 2 2015
  HSC45513  Collinsia heterophylla M. Alcasas 1978-4-22 49 Colusa Bear Valley Rd. 2 mi. from Hwy. 20 419 Comment
  UC71624  Collinsia heterophylla Miss Alice King 1905-1 Colusa College City Comment
  UCD64412  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212362  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS86640  Collinsia rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6682 Colusa sw flank Snow Mtn. (trail from Summit Springs); Colusa-Lake County Line, Snow Mtn. 1590 Comment
  UCD57341  Collinsia sparsiflora Sergio Testa 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  CDA34091  Collinsia sparsiflora P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD82370  Collinsia sparsiflora Robin McMaster 1973-4-15 343 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  CHSC77468  Collinsia sparsiflora var. arvensis Vernon H. Oswald 2000-3-29 9905 Colusa Hwy. 20 600 ft west of Bear Creek, 0.25 mi west of Hwy. 16. 323 Comment
  UC103381  Collinsia sparsiflora var. collina Katharine Brandegee Colusa Eppersons Comment
  JEPS6337  Collinsia sparsiflora var. sparsiflora Alice King 1906-5-1 Colusa College City College Cityu Comment
  UCD66683  Collomia diversifolia Craig D. Thomsen 2000-5-11 2310 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CDA40008  Collomia diversifolia Vernon H. Oswald & Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Road 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat roads. Comment
  JEPS15537  Collomia tinctoria G. Thomas Robbins with L. R. Heckard 1956-7-25 3695 Colusa open rocky slope in woods on ridge above Fouts Camp (along trail to Snow Mt. (about 1 1/2 mi airline se of summit), on Lake-Colusa County boundary) 1920 Comment
  JEPS80138  Collomia tinctoria L. R. Heckard with J. Hickman 1980-7-2 5298 Colusa just above Summit Spring entrance to Snow Mt. trail (ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1630 Comment
  CHSC61060  Cordylanthus palmatus Vernon H. Oswald; Mike Wolder, Joe Silveria 1993-7-26 5700 Colusa Tract 18 on the S side of the refuge, ca. 1 mi W of Ohm Rd, ca. 1 mi N of Ware Rd., ca. 5 mi S of Colusa. Colusa National Wildlife Refuge. 15 Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  NY28942  Cordylanthus palmatus D. W. Taylor 1988-8-8 10024 Colusa 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
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  UCD63123  Cordylanthus tenuis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4953 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  CHSC75703  Cornus sericea subsp. occidentalis Vernon H. Oswald; Lowell Ahart 1999-6-22 9777 Colusa Lily Pond near Upper Letts Lake west of Stonyford. 1243 Comment
  CHSC100407  Cotula australis John Dittes; Josephine Guardino 2008-3-14 1513 Colusa Great Central Valley; Sacramento Valley; between Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air-miles south of Gridley Road, ca. 1.1 air-miles west of Drumheller Slough. 17 Comment
  CHSC101073  Cotula coronopifolia David W. Isle 2006-5-12 1628 Colusa In pre-chiseled rice field 4+ miles NE of Maxwell on W Delevan Hunting Club property farmed by W. Dirks and J. Barrett. 30 Comment
  CHSC107950  Cotula coronopifolia B. Castro; T. Boullion 2011-4-20 1833 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. At north edge of large +- saline/alkaline wetland/marsh, at outer, wet edges of bald patches of bare pale soil. 49 Comment
  CDA30202  Cotula coronopifolia D. Isle 2006-5-12 1628 Colusa In pre-chiseled rice field 4+ miles NE of Maxwell on W Delevan Hunting Club property farmed by W. Dirks and J. Barrett. Comment
  CHSC32200  Crepis monticola James Jokerst 1980-8-8 1078 Colusa North Coast Ranges. Near Snow Mountain (West). Hillside. Comment
  UCD55457  Croton setiger Ellen Dean; Gordon Harrington 2006-10-6 3281 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  CDA34966  Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa Southeast end of East Park Reservoir, north of Lodoga. Comment
  CHSC107967  Crypsis schoenoides B. Castro; L. Janeway 2011-7-9 1896 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 0.3 mi NE of Tehama-Colusa Canal. In small vernally moist pothole off S edge of a grain field, at NW end of vernally moist swale connected to a large +- saline/alkaline wetland/marsh about 0.2 mi to the S. 49 Comment
  CHSC94322  Crypsis schoenoides Lowell Ahart 2006-8-9 13096 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  RSA256295  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1973-5-28 6195 Colusa ca. 3 miles S of Colusa along Hwy. 45. Comment
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UC1950077  Crypsis schoenoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga Comment
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UC1100190  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UC1146681  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa junction of Bear Creek and Sulphur Creek (bridge over Bear Creek, near Sulphur Springs); North Coast Ranges Comment
  UCD37232  Crypsis vaginiflora Beecher Crampton 1958-6-27 4986 Colusa Colusa County, 3.5 miles south of Colusa. Comment
  UCD59963  Crypsis vaginiflora Beecher Crampton 1958-6-27 4986 Colusa 3.5 miles south of Colusa. Comment
  UCD59989  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 miles south of Colusa. 15 Comment
  UCD66867  Crypsis vaginiflora Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5070 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UCD66926  Crypsis vaginiflora Craig D. Thomsen; G. Harrington 2008-7-6 2785 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  UCD56671  Cryptantha Jack Alderson 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  RSA756835  Cryptantha affinis Barbara Ertter 1989-7-1 8615 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  UCD84551  Cryptantha clevelandii Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6149 Colusa Walker Ridge. Just south of radio tower on Cold Spring Mountain. 945 Comment
  UC1392805  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa near Wilbur Springs (n of Hwy 20, Bear Creek canyon); Bear Creek Comment
  HSC45735  Cryptantha flaccida M. Alcasas 1978-4-22 43 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS90300  Cryptantha flaccida Dean W. Taylor 1992-4-16 12408 Colusa on hillsides 0.4 mi due w from spillway into Little Stony Creek (East Park Reservoir); Inner North Coast Range, East Park Reservoir 411 Comment
  UCR233290  Cryptantha flaccida George K. Helmkamp, E. A. Helmkamp 2011-4-1 17133 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UC729980  Cryptantha hispidula Leo F. Koch 1940-4-29 935 Colusa 4 mi from Lake County line (along Highway 20) Comment
  UC971694  Cryptantha hispidula Leo F. Koch 1940-4-29 936 a Colusa near Colusa and Lake county line (along Highway 20, Williams Highway) Comment
  UCD82520  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2877 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCD82527  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2883 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  SDSU19615  Cryptantha intermedia Michael G. Simpson, Sean Ryan 2010-6-21 3366 Colusa Mendocino National Forest. Forest road 16N03 (to Goat Mtn.), ca. 0.2 miles south of junction with 16N18, 1.1 miles line-of-sight northwest of Goat Mountain peak. 1735 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC857152  Cryptantha intermedia Alice Eastwood and John Thomas Howell 1938-5-16 5629 Colusa Lake-Colusa county line on road to Williams Comment
  UCD57302  Cryptantha intermedia Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  UCD82532  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5684 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCR198141  Cryptantha intermedia Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  RSA114163  Cryptantha intermedia H. K. Sharsmith 1953-6-19 4278 Colusa One mile north of Trough Springs on Trough Springs Ridge. Mendocino National Forest 915 Comment
  UC78682  Cryptantha microstachys K. Brandegee Apr 1889 Colusa Epperson's Comment
  UC78651  Cryptantha nemaclada Katharine Curran 1884-1 Colusa Comment
  CHSC32209  Cryptantha torreyana James Jokerst 1980-8-7 1064 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  UC1177889  Cryptantha torreyana Peter M. Ray 1950-4-16 1733 Colusa canyon of North Fork Big Stony Creek ca 1 mi below crossing of the stream North Fork Big Stony Creek Comment
  UCR212290  Cryptantha torreyana Ellen Dean, Davis Botanical Society 2008-5-31 5008 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground 1312 Comment
  UCD110847  Cupressus macnabiana Christopher Mallek 2008-1 FC- 1 Colusa Frenzel Creek. 654 Comment
  JEPS87787  Cupressus sargentii Vernon H. Oswald and Lowell Ahart 1994-3-23 6010 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  NY16797  Cupressus sargentii C. B. Wolf 1934-10-15 6189 Colusa 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
  UCD125755  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD37715  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD61441  Cuscuta californica var. californica Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3886 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 335 Comment
  UC1191660  Cuscuta indecora Herbert L. Mason and Verne Grant 1946-8-6 12974 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  POM312627  Cuscuta indecora H. L. Mason, Verne Grant 1946-8-6 12974 Colusa Pond 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  SEINET810124  Cuscuta indecora Steven P. McLaughlin 1986-1 4213 Colusa Sacramento Valley, 3.5 miles E. of Arbuckle Comment
  UCD126319  Cuscuta indecora var. indecora Herbert L. Mason; Verne Grant 1946-8-6 12974 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  UCD60063  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 miles south of College City, along Grieve road. Comment
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. Comment
  CHSC94416  Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS64066  Cyperus difformis W. L. Jepson 1929-10-1 15343 Colusa Maxwell 25 Comment
  UC1100548  Cyperus difformis Herbert L. Mason and Verne Grant 1946-8-13 13011 Colusa 2 mi. w. Colusa (on Williams hwy. by bridge; Butte Sink); Butte Sink Comment
  SEINET8756311 Image available Cyperus difformis June McCaskill 1954-8-9 362 Colusa ca. 2 miles east of Princeton and 400 yards south of Glenn County line Comment
  UCD141018  Cyperus difformis Herbert L. Mason; Verne Grant 1946-8-7 12983 Colusa 8 miles north of Colusa. Comment
  CHSC94430  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS120707  Cyperus erythrorhizos Lowell Ahart 2013-10-1 19078 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  POM313103  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UC1100515  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-8-13 13012 Colusa 2 mi. w. Colusa (on Williams hwy. by gridge); Butte Sink Comment
  UC72520  Cyperus erythrorhizos H. P. Chandler 1905-9-14 Colusa Princeton Comment
  RSA523855  Cyperus erythrorhizos W. L. Jepson 1929-10-1 15342 Colusa Maxwell 26 Comment
  POM313098  Cyperus odoratus H. L. Mason 1945-9-19 12721 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  CAS-BOT-BC113935  Cyperus odoratus Gordon H. True 1974-11-15 7839 Colusa On Delevan Road just W of Four Mile Road, 4 mi E of Delevan. 27 Comment
  POM208587  Damasonium californicum A. A. Heller, H. E. Brown 1902-5-1 519 Colusa Near Colusa. Comment
  CAS-BOT-BC445507  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  UC584135  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa ca. 27 mi. w. after having passed the <Wilblur> Springs rd. Williams (along Bear Creek) Comment
  JEPS75727  Danthonia californica L. R. Heckard 1974-9-9 3863 Colusa around spring and small stream just ne rocky promontory southeast of Foutch Camp; Snow Mt. 1798 Comment
  CHSC106228  Danthonia californica var. californica B. Castro; L. P. Janeway 2001-6-3 1253 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  JEPS108890  Datisca glomerata Lowell Ahart 2006-8-9 13146 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD57616  Datisca glomerata Jill Poloske; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. In bed of Thompson Creek. 304 Comment
  UCR257972  Datisca glomerata Gordon Harrington 2007-5-31 061 Colusa BLM Payne Ranceh. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, c. 1 mi downstream from Road Kill Cafe 337 Comment
  JEPS120797  Datura stramonium var. tatula Lowell Ahart 2013-10-1 19083 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CHSC112314  Daucus pusillus Lowell Ahart 2013-5-1 18675 Colusa Inner North Coast Range. On the north side of the wash, north of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120992  Daucus pusillus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  JEPS81326  Daucus pusillus L. R. Heckard and J. C. Hickman 1982-7-6 5941 Colusa ca. 1/2 mi. n.e. Summit Springs (e. of trail, s. side Snow Mt.); Snow Mt. 1645 Comment
  UCD38811  Daucus pusillus Beecher Crampton 1958-5-19 4797 Colusa 10.1 miles southeast of Leesville. Comment
  UCD82725  Daucus pusillus Craig Thomsen; G. Harrington 2009-5-14 2908 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  CAS-BOT-BC376273  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodobo Comment
  JEPS80869  Delphinium antoninum L. R. Heckard 1972-7-8 3051 Colusa n side of ridge running se Snow Mt.; West Peak 2011 Comment
  JEPS81345  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  UCD18513  Delphinium hesperium Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley. Comment
  CDA15469  Delphinium hesperium subsp. pallescens G. F. Hrusa, T. D. Wilfred 1998-6-19 14606 Colusa North Coast Ranges; Scattered perennial on steep slope within chaparral above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Flowers blue, other plants nearby range to light blue and pinkish. Crown attachment firm. Comment
  CHSC80059  Delphinium hesperium subsp. pallescens L. P. Janeway; B. Castro 2000-5-4 6709 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 259 Comment
  UC726271  Delphinium hesperium subsp. pallescens A. A. Heller 1940-5-6 15574 Colusa roadside bank on State Hwy #20 about 3 mi e junction with Highway #16 (<later note places locality along road from Williams to Upper Lake...a spot 3 mi e of <junction> actually is n...) Comment
  UCD163698  Delphinium hesperium subsp. pallescens Craig Thomsen 1999-5-10 2004 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  UCR261658  Delphinium hesperium subsp. pallescens Ann Howald 2003-4-23 2308 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 1 mile west of intersection with Lodoga-Stonyford Road 400 Comment
  JEPS6254  Delphinium hesperium subsp. pallescens W. L. Jepson 1932-5-7 16261 Colusa Venado (2 mi. above, in a little valley), Southwestern Colusa County 304 Comment
  UCD57722  Delphinium nudicaule Jordan Thompson; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. South side of Craig Creek on south side of unimproved road. 335 Comment
  HSC25000  Delphinium nudicaule M. Dole 1963-4-15 60 Colusa 7 mi. S of junction of Hwy. 16 and Hwy 20 on Hwy. 16 Comment
  CAS-BOT-BC8058  Delphinium nuttallianum Roxana S. Ferris 1917-4-14 550 Colusa Foothills, 7 mi. west of Arbuckle along Arbuckle-Rumsey Road Comment
  HSC24968  Delphinium patens M. Dole 1963-4-15 30 Colusa 6 mi. S of the junction of Hwys. 16 and 20 on Hwy. 16 Comment
  HSC71332  Delphinium patens Thomas W. Nelson, Jane P. Nelson 1979-4-11 4613 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  CAS-BOT-BC116431  Delphinium patens subsp. patens Roxana S. Ferris 1926-4-23 6446 Colusa Grapevine Grade near top between Stonyford and Sites Comment
  CAS-BOT-BC33189  Delphinium uliginosum M. K. Curran 1884-7-1 s.n. Colusa Epperson's Comment
  SEINET12091405  Delphinium uliginosum R. A. DeMartile 1983-1 109 Colusa Bartlett Springs Road N of Baldy Mt 762 Comment
  CHSC69829  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  UCD57830  Delphinium variegatum Gordon Harrington 2007-4-17 37 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 554 Comment
  UCR55542  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa About 200 yd west of road; on road along Bear Creek from State Hwy 20 N to Leesville, 3.6 mi north of Wilbur Springs turnoff Comment
  HSC95711  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa 9.8 mi. N of Hwy. 20 on Bear Valley Rd., 0.5 mi. into field on E side of rd. Comment
  UCD15434  Delphinium variegatum Lisa Montang 1985-4-13 4 Colusa Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  UCD18512  Delphinium variegatum Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley. Comment
  UCD23392  Delphinium variegatum Patrick Fox 1977-5-8 20 Colusa Open field 9.5 miles north of Highway 20 on Bear Valley Rd. Comment
  CAS-BOT-BC16958  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1926-4-23 6582 Colusa field 2 miles from Stonyford Comment
  HSC87075  Delphinium variegatum subsp. variegatum L. Blackford, S. Branch, D. Malm 1988-4-17 77 Colusa 1.3 mi. S of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. Comment
  SEINET3927152  Deschampsia cespitosa Fred W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys, western.; 0 Comment
  CHSC107946  Deschampsia danthonioides B. Castro; L. Janeway 2011-4-27 1867 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  RSA10441  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa Sacramento Valley. 3 mi. south of Arbuckle Comment
  UC188868  Deschampsia danthonioides Miss M. Alice King 1905-1 Colusa near College City College City; Sacramento Valley Comment
  UCD163709  Deschampsia danthonioides Craig Thomsen 1999-5-10 2021 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCR212334  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), 0.5 mi west of Hwy 20/16 intersection, (c. 0.3 mi. east of Hwy 20 'Vista Point'). 345 Comment
  SEINET10524178  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles east of Williams. Alkali plains. Comment
  JEPS75036  Deschampsia elongata L. R. Heckard 1972-7-10 3109 Colusa Trout Creek crossing of trail to Box Spring (Snow Mt.); Snow Mt. 1828 Comment
  JEPS81318  Descurainia sophia L. R. Heckard and J. C. Hickman 1982-7-6 5933 Colusa slope above and e Summit Springs (on s side of Snow Mt); Snow Mt. 1584 Comment
  CHSC48439  Dicentra chrysantha Vernon Oswald 1984-7-20 1609 Colusa M10, 11.3 mi w of Rd. 306 at Stonyford. 792 Comment
  JEPS80089  Dicentra formosa L. R. Heckard with J. Hickman 1979-6-16 5097 Colusa s of Milk Ranch (nw of West Peak, Snow Mt.); Snow Mt. 2011 Comment
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  UCR206370  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14366 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  CAS-BOT-BC502550  Dichelostemma congestum Roxana S. Ferris 1926-4-21 6309 Colusa Sycamore Slough near Sycamore Comment
  CHSC93753  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road ca. 3 miles SE of Leesville. 480 Comment
  UCD139269  Dichelostemma volubile K. Esau 1934-5-5 s.n. Colusa Tahoe-Ukiah Highway, west of Williams. Comment
  CAS-BOT-BC503139  Dichelostemma volubile David D. Keck 1933-5-30 2400 Colusa 1 mile east of Lake County line, west of Wilbur Springs, on south slope. Comment
  CAS-BOT-BC503141  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road, 3 miles southeast of Leesville; just below the summit of the pass on the east side. 480 Comment
  CAS-BOT-BC503142  Dichelostemma volubile Roxana S. Ferris 1926-4-23 6413 Colusa On grade beyond the Mountain House on the Williams-Stonford Road Comment
  SEINET3885768  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road, 3 miles southeast of Leesville; just below the summit of the pass on the east side.; 0 480 Comment
  CHSC32197  Dieteria canescens var. shastensis James Jokerst 1980-8-8 1084 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UC1100289  Digitaria ischaemum Herbert L. Mason 1945-9-19 12722 a Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink spillway Comment
  POM313166  Digitaria sanguinalis H. L. Mason 1945-9-19 12722 b Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  CHSC29758  Diplacus tricolor K. R. Stern 1980-5-5 6626 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC60689  Diplacus tricolor Vernon H. Oswald 1993-4-14 5263 Colusa N. side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CAS-BOT-BC208651  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  CAS-BOT-BC208652  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  JEPS118718  Distichlis spicata B. Castro, L. P. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UCD61480  Distichlis spicata Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3887 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  UCD64465  Distichlis spicata var. stricta Beetle 1946-6-27 4686 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  JEPS9528  Dodecatheon clevelandii subsp. patulum Alice King April, 1906 Colusa College City Comment
  CAS-BOT-BC433232  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  RSA590196  Dodecatheon hendersonii Michael A. Vincent, Robert M. Rhode 1996-3-30 7298 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  SEINET11262864  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites Logoda Road ca 4.7 miles NE of Logoda on the W end of Grapevine Pass.; 0 527 Comment
  UCD97119  Dodecatheon hendersonii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6902 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  SEINET215100 Image available Dodecatheon hendersonii Laurie E. Miller 1973-4-15 15 Colusa Walker Ridge hunting access road, 1 mile from State Highway 20. Comment
  UCD118842  Dodecatheon hendersonii subsp. hendersonii Victor Duran 1933-4-3 3378 Colusa Stonyford. 304 Comment
  CHSC29749  Downingia bella K. R. Stern 1980-6-1 6638 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC29750  Downingia insignis K. R. Stern 1980-6-1 6637 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UC1192040  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa 3 mi e Maxwell Comment
  UC1609312  Downingia insignis Vernon H. Oswald and Lowell Ahart 1993-5-27 5428 Colusa ca 0.5 mi nw Sites (Sites-Lodoga Rd, Sacramento Valley); Sacramento Valley 121 Comment
  UCD18837  Downingia insignis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 144 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  POM312375  Downingia insignis H. L. Mason 1953-4-5 14506 Colusa 3 miles east of Maxwell Comment
  JEPS33725  Downingia pulchella D. E. Breedlove 1963-5-30 5191 Colusa 5 mi w Leesville Comment
  UCD55129  Downingia pulchella L. L. Ferwerda 1968-5-4 17 Colusa In Bear Valley; ca. 11 miles northwest of State Highway 20. 408 Comment
  UC70438  Drosera rotundifolia Milo S. Baker 1898-8-22 555 Colusa Bear Valley Mts.; along stream Comment
  UCD163881  Drymocallis glandulosa Craig D. Thomsen 2002-3-27 2579 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.25 mile west of Hwy 20/16 instersection. Comment
  CHSC94317  Dysphania botrys Lowell Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS120706  Dysphania pumilio Lowell Ahart 2013-10-1 19086 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  JEPS110362  Echinochloa crus-galli Lowell Ahart 2006-8-22 13233 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC1100257  Echinochloa crus-galli Malcolm A. Nobs and S. Galen Smith 1949-9-9 1874 Colusa 3 mi w Williams; w of Williams Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  UCD34846  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena. Comment
  UCD61166  Echinochloa oryzicola var. mutica P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. Comment
  CDA184  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 Comment
  CAS-BOT-BC445569  Echinodorus berteroi Gordon H. True 1974-11-15 7840 Colusa On Delevan Road just west of Four Mile Road, 4 mi. east of Delevan 27 Comment
  UCD137952  Echinodorus berteroi P. B. Kennedy 1925-9-1 s.n. Colusa Cortina. Comment
  UCD81617  Ehrendorferia chrysantha Collector Unknown 1950-6-1 s.n. Colusa Payne Range. Comment
  UCD110439  Elatine ambigua June McCaskill 1954-8-9 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  UCD49591  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-9-9 1878 Colusa Rice fields 3 miles W of Williams. Comment
  CHSC79857  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  UCD49729  Eleocharis montevidensis D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain between Lodoga and Red Rock Cabin. 420 Comment
  POM198509  Eleocharis palustris Roxana Stinchfield 1916-7-11 453 Colusa Colusa - Williams Road at Trough Comment
  SEINET13710358  Eleocharis parishii Lowell William Ahart, Lowell William Ahart 2003-1 10382 Colusa 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  UCD163346  Eleocharis parishii Craig D. Thomsen 2000-5-11 2352 Colusa Walker Ridge. Buck Flat. 129 Comment
  UCD61431  Elymus elymoides Beecher Crampton 1958-5-19 4815 Colusa Little Stony Creek Canyon 4-8 miles west of Lodoga. Comment
  UCD61526  Elymus elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 548 Comment
  UCD61690  Elymus elymoides subsp. californicus D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  JEPS80181  Elymus elymoides subsp. elymoides L. R. Heckard with J. Hickman 1980-7-3 5333 Colusa just w Summit Springs (ca 10 mi w of Stonyford, sw Snow Mt., Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  CHSC100289  Elymus glaucus D. Isle 1988-4-13 1514 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  JEPS76125  Elymus glaucus subsp. glaucus W. L. Jepson 1938-6-11 18991 Colusa on creek 4 mi se Wilbur Springs; Bear Creek Comment
  UCR206350  Elymus glaucus var. glaucus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14743 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCD67001  Elymus multisetus Craig D. Thomsen 2008-5-23 2738 Colusa BLM Payne Ranch. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  UC641658  Elymus trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 mi w Leesville (dry bed of rivulet) Comment
  UCD62670  Elymus trachycaulus subsp. trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 miles west of Leesville. Comment
  JEPS16205  Emmenanthe penduliflora Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3180 Colusa Just west of base of the grade to Indian Valley (Bartlett Mt. Road), just west of Bear Valley, Inner North Coast Ranges Comment
  UCD170129  Emmenanthe penduliflora Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  CHSC112237  Emmenanthe penduliflora var. penduliflora Lowell Ahart 2013-5-1 18686 Colusa Inner North Coast Ranges. Near a small drainage, north of the of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC90779  Emmenanthe penduliflora var. penduliflora D. Isle 2002-4-18 183 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, N. of Fouts Springs. 548 Comment
  UC73325  Epilobium campestre Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  SBBG120018  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  JEPS75755  Epilobium ciliatum subsp. glandulosum L. R. Heckard and R. Bacigalupi 1976-9-6 4437 Colusa trail crossing Snow Mt., Trout Creek 1828 Comment
  CHSC79783  Epilobium foliosum L. P. Janeway; B. Castro 2000-5-4 6705 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  CHSC80234  Epilobium foliosum B. Castro; L. P. Janeway 2000-5-2 1118 Colusa Vicinity of Sites-Lodoga Rd, and Grapevine Creek. On W-facing slope by dirt road just E of creek. 249 Comment
  CHSC91051  Epilobium minutum D. Isle 2003-6-12 365 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt.--meadow 1/4 mi. below road N80 E from jct. of Rd. to Goat Mt. lookout and Horse Glade Rd. GPS: 10S 0524032E 4346780N. 1645 Comment
  UCD164046  Epilobium minutum Richard Philbrook 2016-4-9 4 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just southwest of corral at junction of 16 and 20. Northeast facing slopes of hill. 343 Comment
  CDA38115  Epilobium minutum T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  POM256523  Epilobium minutum E. K. Crum 1938-5-8 2026 Colusa 3 miles north of Leesville. Comment
  UCD106510  Epilobium minutum Linda A. Bell 1975-4-27 79 Colusa Barlett Springs Road, 1.5 miles E of Bear Valley Road. 609 Comment
  CHSC106240  Epipactis gigantea B. Castro; L. P. Janeway 2001-6-3 1257 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. At upper edges of meadow. 880 Comment
  CAS-BOT-BC58046  Equisetum Roxana Stinchfield 1916-7-11 430 Colusa Sycamore Slough Road. Comment
  JEPS110233  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724896  Equisetum laevigatum L. Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  RSA724897  Equisetum telmateia var. braunii L. Ahart 2006-8-22 13211 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC84966  Eragrostis hypnoides Lowell Ahart 2003-10-23 10674 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  SEINET200142 Image available Eragrostis hypnoides Herbert L. Mason 1945-9-19 12717 Colusa Below causway over Butte Sink spillway east bank of Sacramento River 1 mile above Colusa Comment
  CAS-BOT-BC479710  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.1 mi N of Lodoga, near shore of reservoir 370 Comment
  CDA11387  Ericameria linearifolia G. F. Hrusa, K. van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges; Walker Ridge Road approximately 3 miles N of Highway 20. Comment
  CHSC62837  Ericameria linearifolia Vernon H. Oswald; Lowell Ahart 1994-3-23 6019 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Along road. 505 Comment
  SEINET251843  Erigeron L. Shultz, J. Shultz 1986-9-20 10226 Colusa 10 miles west of Colusa on Highway 20 Comment
  JEPS80754  Erigeron inornatus var. inornatus L. R. Heckard and J. C. Hickman 1981-7-29 5721 Colusa Spur, about .75 km se Summit Springs; Snow Mt., Summit Springs 1554 Comment
  UC71629  Eriodictyon californicum Miss Alice King 1905-1 Colusa College City Comment
  UCD58169  Eriodictyon californicum Gordon Harrington 2007-5-15 59 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  UCD72480  Eriodictyon californicum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3814 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  UCR206378  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2009-5-20 14759 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC92834  Eriogonum covilleanum D. Isle 2000-6-7 1246 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  CAS-BOT-BC242576  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa Bear Creek Canyon n. of Highway 20 (near Wilbur Springs) Comment
  CHSC112641  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC94726  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS110262  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  POM279914  Eriogonum dasyanthemum Lyman Benson 1933-6-26 4489 Colusa Abbott mine. 549 Comment
  RSA0118881  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD163236  Eriogonum dasyanthemum Craig D. Thomsen 2000-6-7 2362 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD63122  Eriogonum dasyanthemum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4952 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  UCR263625  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  CAS-BOT-BC242580  Eriogonum dasyanthemum James L. Reveal 1988-6-2 6985 Colusa Walker Ridge Road along the Lake County line, 3.3 miles north of the turnoff to Jordan Valley Dam and 0.2 mile south of the summit of the road, about 9 miles north of California Highway 20 and 7 miles south of the Bartlett Springs Road 1082 Comment
  JEPS57028  Eriogonum dasyanthemum W. L. Jepson 1934-7-28 16749 Colusa hills se of Cortina Valley Comment
  UCD70225  Eriogonum dasyanthemum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual grasslands growing on ultramafic soils. 370 Comment
  CAS-BOT-BC259384  Eriogonum luteolum P. C. Everett; E. K. Balls 1954-10-17 20336 Colusa West slope Goat Mt., 0.9 mi. s.w. from Linger Longer campsite; road from Stonyford to Upper Lake 1828 Comment
  UCD100311  Eriogonum luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa near Glenn County line, at Goat Mountain Lookout, just below summit of Goat Mountain. 1865 Comment
  UC1043546  Eriogonum luteolum var. luteolum P. C. Everett and E. K. Balls 1954-10-17 20336 Colusa 0.9 mi sw on road from Stonyford to Upper Lake Linger Longer campsite (w slope Goat Mt.); Goat Mt. 1828 Comment
  UCD73924  Eriogonum nervulosum G. Ledyard Stebbins 1966-6-6 6433 Colusa Lovelady Ridge. Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  UCD100642  Eriogonum nudum var. nudum Arthur M. Shapiro 1988-8-24 s.n. Colusa near Glenn County Line, at Goat Mountain Lookout, just below summit of Goat Mountain. In Mendocino National Forest. 1865 Comment
  JEPS56620  Eriogonum nudum var. pubiflorum W. L. Jepson 1934-7-28 16750 Colusa hills se Cortina Valley Comment
  JEPS75856  Eriogonum spergulinum var. reddingianum L. R. Heckard 1974-9-10 3894 Colusa e ridge of East Peak, Snow Mt. Snow Mt. 2042 Comment
  JEPS80805  Eriogonum strictum var. greenei L. R. Heckard and J. C. Hickman 1981-7-30 5776 Colusa about 2.5 km on ridge running e from West Peak; Snow Mt. 2011 Comment
  CAS-BOT-BC267413  Eriogonum tripodum G. L. Stebbins 1972-6-25 9001 Colusa East side of Black Diamond Ridge, 5 miles northwest of Stonyford 579 Comment
  CHSC101098  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa In the saddle and ridge top 1/3 mile south of Goat Mountain Lookout, 1804 Comment
  JEPS73454  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1972-7-8 3054 Colusa n side of ridge running se Snow Mt., West Peak 1981 Comment
  UCD101410  Eriogonum umbellatum var. bahiiforme Beecher Crampton 1963-6-11 6850 Colusa 2 miles south Lodoga. Comment
  UCD101578  Eriogonum wrightii var. subscaposum Arthur M. Shapiro 1988-8-24 s.n. Colusa at the base of Goat Mountain Road, 3.2 miles west of Lodoga. Comment
  UCD57823  Eriophyllum lanatum Gordon Harrington 2007-4-17 34 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  CAS-BOT-BC308095  Eriophyllum lanatum var. achilleoides Pat Daly; Rudy Galindo 1988-4-16 54 Colusa 3.7 miles west on Goat Mountain Road off of Lodoga-Stonyford Road to Digger Pine Campground 451 Comment
  CAS-BOT-BC308098  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CDA15503  Eriophyllum lanatum var. achilleoides G. F. Hrusa, WTD 1998-6-19 14640 Colusa North Coast Ranges; Trough Springs ridge, immed. above (overlooking settlement) Fouts Springs. Comment
  CHSC94882  Eriophyllum lanatum var. achilleoides Lowell Ahart 2006-6-11 12674 Colusa On the east side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS108812  Eriophyllum lanatum var. achilleoides Lowell Ahart 2006-6-11 12674 Colusa On the east side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS75857  Eriophyllum lanatum var. achilleoides L. R. Heckard 1974-9-10 3893 Colusa along upper reaches of Dark Hollow Creek (s of East Peak); Snow Mt., Dark Hollow Creek 2042 Comment
  CAS-BOT-BC301384  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1917-4-18 587 Colusa 5 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC8130  Eriophyllum lanatum var. grandiflorum J. G. Moore 1969-4-12 64 Colusa North side of Hwy. 20 on hillside 15 mi. w of Williams. 106 Comment
  POM163461  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1926-4-23 6411 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCD38807  Eriophyllum lanatum var. grandiflorum Beecher Crampton 1958-5-19 4813 Colusa Little Stony Creek canyon, west of Ladoga. Comment
  POM278144  Erodium botrys Lyman Benson 1933-4-16 4333 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  RSA730242  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UC35202  Erodium cicutarium J. Burtt Davy May 1898 4281 Colusa near Willows Comment
  UC73402  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City, Sacramento Valley); Sacramento Valley Comment
  UCR238747  Erodium moschatum George K. Helmkamp, E. A. Helmkamp 2012-2-9 18536 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC211071  Eryngium Roxana Stinchfield 1916-6-18 309 Colusa R.R. embankment near College City Comment
  CHSC84964  Eryngium aristulatum Lowell Ahart 2003-10-23 10662 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC660108  Eryngium aristulatum var. aristulatum Milo S. Baker 1941-7-8 10110 Colusa s. Stony Ford (Valley along Bear Creek); Valley along Bear Creek Comment
  CHSC78579  Eryngium castrense J. Marr; C. Warren, H. West 1998-7-1 Colusa Vicinity of Sites, Logan Ridge and Antelope Valley. 91 Comment
  CDA38319  Eryngium castrense Kingwell 1930-5-2 s.n. Colusa [no additional data] 0 Comment
  CDA12013  Erysimum capitatum G. F. Hrusa 1990-4-8 7665 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  CDA21063  Erysimum capitatum G. F. Hrusa 1993-5-2 10856 Colusa North Coast Ranges; Frenzel Creek Research Natural Area, Mendocino National Forest. Mouth of Frenzel Creek, tributary of Little Stony Creek. Comment
  UCD64435  Erysimum capitatum Craig D. Thomsen 2001-4-24 2474 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  CAS-BOT-BC40754  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. Comment
  CHSC112229  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC94464  Erythranthe floribunda Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CHSC27633  Erythranthe nudata Tim Spira; Rober Schlising 1978-5-13 3236 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC94638  Erythranthe nudata Lowell Ahart 2006-6-11 12663 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CAS-BOT-BC402660  Eschscholzia caespitosa Brandegee 1889-4-1 s.n. Colusa Unspecified Comment
  RSA293185  Eschscholzia caespitosa subsp. caespitosa J. P. Smith, Tom Nelson, Jane Nelson 1978-4-2 9560 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  JEPS80217  Eschscholzia californica L. R. Heckard and J. Hickman 1980-7-3 5373 Colusa above Summit Springs (sw slope of mt.); Snow Mt. 1554 Comment
  CAS-BOT-BC402975  Eschscholzia californica Roxana Stinchfield 1916-7-12 473 Colusa College City Comment
  CAS-BOT-BC402976  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC402978  Eschscholzia californica Roxana S. Ferris 1917-4-14 603 Colusa 3 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC5881  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC5887  Eschscholzia californica var. crocea Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  UC71635  Eschscholzia lobbii Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC91581  Eschscholzia rhombipetala K. Curran s.n. Colusa Stites. Comment
  SEINET2442355  Eucalyptus camaldulensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14319 Colusa Sacramento Valley: Jameson Road 1.3 miles north of its junction with Lurline ROad and south of Harbison Road, generally west of the city of Colusa. 16 Comment
  UC1053473  Euphorbia crenulata Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3184 Colusa just w Bear Valley (slope just w of base of grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  CHSC112255  Euphorbia spathulata Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18645 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC59969  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa In field on east side of Bear Valley Road, 10.6 miles (by road) north of junction with State Highway 20. Valley floor of Bear Valley. 381 Comment
  JEPS94662  Euphorbia spathulata Vernon Oswald and Lowell Ahart 1998-5-7 Colusa Bartlett Springs Rd. 2.1 mi w Bear Valley Rd. (0.8 mi e of Sawtelle Valley and Grapevine Flat roads) 524 Comment
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  UCD57049  Euphorbia spathulata Gordon Harrington; Diana Hickson 2007-4-7 14 Colusa BLM Payne Ranch, SW of intersection Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  CHSC61769  Euthamia occidentalis Vernon H. Oswald 1993-9-1 5889 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N side of Hunters Creek in Tract 44, near the S boundary of the refuge. 22 Comment
  UCD81254  Euthamia occidentalis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5419 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 312 Comment
  UCD57295  Extriplex joaquinana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3666 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  JEPS81290  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5902 Colusa s of Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UCD63871  Forestiera pubescens Craig D. Thomsen 2008-5-31 2758 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwys 16 and 20. Cowboy Camp area on the west side of Hwy 16, 1 mile south of Hwy 20. 0.25 mile west of public viewing area and Bear Creek. 285 Comment
  SEINET7417537 Image available Frangula californica A. A. Heller 1916-1 12359 Colusa Coast Range; ca. 3 mi W of Leesville Comment
  HSC48195  Frangula californica subsp. californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3961 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC63013  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  JEPS118616  Frangula californica subsp. crassifolia B. Castro, L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge Road ca 0.5 mi N of its junction with USFS Rd 16N06, 0.5 mi NE of Pacific Point. Hough Springs 7.5' quad. Comment
  UCD66952  Frangula californica subsp. crassifolia Ellen Dean; Davis Botanical Society 2008-5-31 4996 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD112795  Frangula californica subsp. tomentella D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. At Stoney Creek. 450 Comment
  UCD58175  Frangula californica subsp. tomentella Gordon Harrington 2007-5-31 67 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  CAS-BOT-BC223843  Frankenia palmeri Roxana Stinchfield 1916-7-11 450 Colusa Colusa - Williams Road the trough Comment
  CAS-BOT-BC223844  Frankenia palmeri Roxana Stinchfield 1916-6-17 282 Colusa College City Comment
  CHSC52632  Frankenia salina James Jokerst 1985-4-24 2495 Colusa Near Lurline Creek. 41 Comment
  CHSC76343  Fraxinus dipetala L. P. Janeway; B. Castro 1999-7-5 6500 Colusa Along Goat Mountain Road on south side of Little Stony Creek about 0.2 mi west of Trout Creek. Steep north facing shrubby slope. 530 Comment
  UC1051743  Fraxinus dipetala Helen K. Sharsmith 1953-6-20 4299 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CAS-BOT-BC223488  Fraxinus latifolia Roxana S. Ferris 1926-4-23 6433 Colusa Near Stonyford Comment
  CAS-BOT-BC223490  Fraxinus latifolia Roxana S. Ferris 1917-4-17 616 Colusa Sycamore Slough Comment
  CHSC75732  Fraxinus latifolia Vernon H. Oswald; Lowell Ahart 1999-6-22 9779 Colusa Lily Pond near Upper Letts Lake west of Stonyford. 1243 Comment
  RSA589939  Fritillaria Michael A. Vincent, Robert Rhode 1996-3-30 7305 Colusa Along Brim Road, 2.9 mi W jct Bear Valley Rd. Comment
  UCD110806  Fritillaria affinis Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCSC010485  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  SEINET12058445  Fritillaria atropurpurea M. A. Vincent, Rhode, R. 1996-1 Colusa Comment
  CAS-BOT-BC130339  Fritillaria glauca Donald V. Hemphill 1956-5-26 s.n. Colusa 1/4 mi. south of Snow Mt. East 2103 Comment
  JEPS74659  Fritillaria glauca James E. Eckenwalder 1974-6-2 359 Colusa on w flank of east peak of Snow Mountain Snow Mountain Comment
  CAS-BOT-BC130433  Fritillaria pluriflora James Jokerst 1985-4-10 2229 Colusa Near Walker Ridge Comment
  CAS-BOT-BC130434  Fritillaria pluriflora Barbara Menzies; Arthur Menzies 1967-3-18 s.n. Colusa 10 mi. north of Highway 20 (Bear Valley), 5 mi. north of Wilbur Springs cut-off Comment
  JEPS100637  Fritillaria pluriflora Dean W. Taylor 1992-4-16 12400 Colusa East Park Reservoir, ca. 0.4 mi due W from spillway into Little Stony Creek Inner North Coast Range 411 Comment
  JEPS42811  Fritillaria pluriflora Wayne Roderick 1966-3-26 Colusa 1/2 mi e of Robbers Flat (adjacent to Bartlett Springs Road, Bear Valley); Bear Valley 417 Comment
  UCD80816  Fritillaria pluriflora Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5272 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SE-facing slope above trail that links Thompson and Craig Canyons. 484 Comment
  UCD82525  Fritillaria pluriflora Craig Thomsen; G. Harrington 2009-5-12 2882 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East- facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  SEINET8478935  Fritillaria pluriflora M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  UCSC010484  Fritillaria purdyi Dylan M. Neubauer, Tim Forsell 2016-3-31 599 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  HSC62768  Fritillaria purdyi M. Dean Griswold Jr. 1979-4-14 16 Colusa 1067 Comment
  HSC62800  Fritillaria purdyi Michelle Stevens 1979-4-14 32 Colusa 1067 Comment
  JEPS54480  Galium G. L. Stebbins 1966-6-6 Colusa s Little Stony Creek (just sw of junction with Frenzel Creek); Lovelady Ridge 457 Comment
  CDA14917  Galium andrewsii G. F. Hrusa 1993-5-2 10862 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Above Frenzel Creek, tributary of Little Stony Creek. Comment
  JEPS80799  Galium andrewsii subsp. andrewsii L. R. Heckard and J. C. Hickman 1981-7-30 5769 Colusa about 100 ft above on n side Trout Creek (se side of mt); Snow Mt. 1554 Comment
  UCSC010370  Galium andrewsii subsp. andrewsii Dylan M. Neubauer, Tim Forsell 2016-3-30 594 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  JEPS52809  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4355 Colusa Hwy 20 along creek 1 mi w junction with Highway 16; Bear Creek 329 Comment
  UCD64437  Galium aparine Craig D. Thomsen 2000-3-31 2070 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  JEPS80054  Galium bifolium L. R. Heckard with J. Hickman 1979-6-15 5054 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  JEPS81405  Galium grayanum L. R. Heckard and J. C. Hickman 1982-7-9 6012 Colusa just e lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  CHSC91041  Galium grayanum var. nanum D. Isle 2003-6-12 375 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. On Colusa/Lake County line, 1/8 mi. SE of Goat Mt. Lookout. 1841 Comment
  CHSC94525  Galium parisiense Lowell Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725011  Galium parisiense L. Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  UC1229764  Galium parisiense Francia Chisaki and Helen K. Sharsmith 1959-5-27 1334 Colusa on road leading out of Red Bridge Camp Mill Creek Crossing Comment
  UCD64440  Galium parisiense Craig D. Thomsen 2000-3-31 2080 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82478  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2856 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD163913  Galium porrigens var. porrigens Sara Martin 2016-4-9 5 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Hill to the south of corral at junction of 16 and 20. 464 Comment
  UCR227343  Galium porrigens var. tenue Craig D. Thomsen 2001-5-24 2457 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  UCD121911  Galium porrigens var. tenue Elaine J. Imada 1971-4-10 15 Colusa East side of ridge; Bear Valley, Walker Ridge. Comment
  CHSC48888  Galium trifidum var. pacificum Vernon Oswald 1984-7-20 1615 Colusa Lily Pond N of Letts Lake in Mendocino National Forest. 1280 Comment
  CHSC22851  Garrya congdonii Robert A. Schlising 1962-1-31 2031 Colusa Coast Ranges. Along Stoney Creek. 441 Comment
  CHSC39247  Garrya congdonii B. A. Stein 1982-5-2 535 Colusa South end of East park Reservoir. Comment
  JEPS11967  Garrya congdonii Rimo Bacigalupi with G. T. Robbins 1954-6-25 4623 Colusa on road from Indian Valley (Lake County) to Bear Valley (Colusa County) (0.5 mi e of summit (Lake - Colusa County line)) 548 Comment
  UCD121089  Garrya congdonii G. F. Hrusa 1996-1-23 12626 Colusa N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Inner North Coast Ranges. 475 Comment
  UCD58107  Garrya congdonii Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3354 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 560 Comment
  CHSC90682  Garrya flavescens D. Isle 1996-3-12 1010 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Just west of Ruby King Mine. 426 Comment
  JEPS80433  Garrya fremontii L. R. Heckard and R. Bacigalupi 1976-9-6 4421 Colusa above Summit Springs (along trail to Fouts Camp, Lake-Colusa County boundary); Snow Mt. 1615 Comment
  CHSC107496  Garrya veatchii Ralph Minto 2010-1-29 1919 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Fouts Springs road. 609 Comment
  CHSC85961  Gastridium phleoides Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 106 Comment
  JEPS80143  Gayophytum diffusum subsp. diffusum L. R. Heckard with J. Hickman 1980-7-2 5304 Colusa trail from Summit Springs to Snow Mt. Peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. boundary) 1676 Comment
  JEPS76800  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  CHSC77934  Geranium carolinianum Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 Comment
  UC73425  Geranium carolinianum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City); Sacramento Valley Comment
  CHSC101434  Geranium dissectum David Isle 2007-5-1 1575 Colusa SE of Maxwell approx. 4 miles in riparian natural area just W of irrigation canal adjacent to 'Lakeland' rice fields farmed by William Dirks and Jack Barrett. W of footbridge S of third landing. 30 Comment
  SBBG61312  Geranium dissectum G. K. Helmkamp with E. A. Helmkamp 2011-4-1 17117 Colusa Maxwell Rd, 2.1 mi E of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UCD57560  Geranium dissectum Stephanie Castle; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek. 304 Comment
  UCR233360  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa Western Sacramento Valley, along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  CHSC75627  Geum macrophyllum Vernon H. Oswald; Lowell Ahart 1999-6-22 9781 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at Lily Pond. 1243 Comment
  UC1613427  Gilia Charles M. Belshaw April 1937 2869 Colusa vicinity Cook's Spring (Devil's Ridge); Inner Coast Range, Devil's Ridge Comment
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley Comment
  SEINET12278770  Gilia capitata C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  UC1585898  Gilia capitata subsp. abrotanifolia Barbara Ertter 1989-7-1 8601 Colusa road to Goat Mt. Lookout 2.2 mi s Rt M-10 (Bear Creek-Fouts Spring Rd) (ca 12 mi wsw of Stonyford, sw side of ridge, at head of creek); S. Fk. Stony Creek 1500 Comment
  CHSC14016  Gilia tricolor G. Notch 1974-3-30 120 Colusa Ca. 0.5 mi w of jct of Hwys 20 and 16. 304 Comment
  HSC45794  Gilia tricolor J. P. Smith, Thomas W. Nelson 1976-4-14 8581 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  HSC66136  Gilia tricolor S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Colusa Bartlett Springs Rd. Comment
  RSA469705  Gilia tricolor Michelle Stevens 1979-4-14 18 Colusa Buck Flat on Walker Ridge Road. 884 Comment
  UCD14374  Gilia tricolor L. Coats 1983-4-24 11 Colusa Colusa Co.; in the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road; 487 Comment
  UCD15437  Gilia tricolor Lisa Montang 1985-4-13 5 Colusa California, Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  CHSC112236  Gilia tricolor subsp. diffusa Lowell Ahart 2013-5-1 18684 Colusa Inner North Coast Ranges. Near a small drainage, north of the of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC106686 Image available Gilia tricolor subsp. tricolor T. S. Brandegee April 1889 Colusa Colusa Junction Comment
  HSC47647  Githopsis specularioides J. P. Smith, J. O. Sawyer 1978-4-29 9789 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  UCD72441  Githopsis specularioides G. L. Webster; June McCaskill, Robert Rhode, John Tucker 1993-5-16 7781 Colusa 0.3 mi SW of McCloud Bridge. 335 Comment
  JEPS120805  Glinus lotoides Lowell Ahart 2013-10-1 19074 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1563931  Glinus lotoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 Comment
  CHSC92602  Glyceria striata D. Isle 2005-7-14 1143 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In first perennial drainage west of junction 17N09 diagonal 17N10 about 40 yards above culvert crossing 17N09. Waypoint BDCMP 1: NAD27 10S 0523113E 4350662N. Comment
  UCD57442  Glycyrrhiza lepidota Gina Darin; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  RSA724833  Gnaphalium californicum L. Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  SEINET7042569  Gnaphalium canescens A. G. Vestal 1938-9-1 s.n. Colusa Along top of trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  POM53851  Gnaphalium palustre Roxana Stinchfield 1916-6-17 289 Colusa At Tule levee, College City. Comment
  POM53845  Grindelia camporum Roxana Stinchfield 1916-6-17 283 Colusa Near Tule - College City. Comment
  POM53847  Grindelia camporum Roxana Stinchfield 1916-7-11 455 Colusa Willaims Road at the 'Trough' Comment
  UCR261756  Grindelia camporum Ann Howald 2003-5-30 2356 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CAS-BOT-BC305305  Grindelia hirsutula Roxana Stinchfield 1916-6-17 283 Colusa College City Comment
  JEPS113893  Grindelia hirsutula L. P. Janeway 2007-6-17 9059 Colusa Inner North Coast Ranges; Along Bear Valley Road and Bear Creek near Hwy 20. 325 Comment
  RSA0016943  Grindelia hirsutula var. davyi C. B. Wolf 1928-5-8 2126 Colusa 3 miles S of Arbuckle, Pacific Hwy. Comment
  JEPS80117  Hackelia amethystina L. R. Heckard with J. Hickman 1980-7-1 5275 Colusa n side of East Peak; Snow Mountain 2072 Comment
  JEPS81334  Hackelia amethystina L. R. Heckard and J. C. Hickman 1982-7-6 5948 Colusa s side of Snow Mountain (western edge of West Peak Ridge); , West Peak Ridge Comment
  CHSC91036  Hackelia micrantha D. Isle 2003-6-25 378 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0524627E 4345811N. 1731 Comment
  UCD37194  Hainardia cylindrica Beecher Crampton 1958-5-19 4825 Colusa Colusa County, 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCD37233  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa Colusa County, 3.5 miles south of Colusa. Comment
  CHSC70967  Harmonia hallii Vernon Oswald; Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. On roadside banks. 633 Comment
  UCD72454  Hedypnois cretica Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3791 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
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Jun 12 2013
  UCD70304  Helenium puberulum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  UCD170090  Helianthemum scoparium Jack Alderson 2016-9-3 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5100 feet (1555 m) south of the confluence of Brophy Creek with Bear Creek. 472 Comment
  CDA15546  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1/2 mi. from Lodoga/Stonyford Rd. Comment
  UCD61457  Helianthus bolanderi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3903 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCD64041  Helianthus bolanderi Craig D. Thomsen 2000-6-23 2426 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  CHSC84973  Heliotropium curassavicum Lowell Ahart 2003-10-23 10663 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS120804  Heliotropium curassavicum Lowell Ahart 2013-10-1 19096 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCR201552  Heliotropium curassavicum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14261 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CHSC107283  Helminthotheca echioides L. P. Janeway; B. Castro 2011-7-9 10507 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Te-hama-Colusa Canal. 50 Comment
  JEPS12555  Hemizonia congesta subsp. clevelandii R. F. Hoover 1938-6-11 3596 Colusa Williams-Lake Co. hwy at junction Wilbur Sprs. road Comment
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  RSA0115040  Hemizonia congesta subsp. clevelandii Lyman Benson 1948-7-16 12923 Colusa Road between Williams and Clear Lake just east of Lake Co. line. Mt. Range: Inner North Coast. 548 Comment
  SEINET10797452  Hemizonia congesta subsp. clevelandii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 382 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  UC73977  Hemizonia congesta subsp. luzulifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD61455  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3901 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just north of the headwaters of Eula Canyon. 339 Comment
  UCD66458  Hemizonia congesta subsp. luzulifolia Craig D. Thomsen 2000-6-7 2363 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CDA7037  Hemizonia congesta subsp. luzulifolia T. C. Fuller 1958-5-27 3687 Colusa Highway 20, 0.7 mile west of junction with Hwy 16. 0 Comment
  POM56197  Hemizonia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa. Comment
  JEPS80774  Heracleum lanatum L. R. Heckard and J. C. Hickman 1981-7-30 5747 Colusa s.e. slope Snow Mt. (Trout Creek trail); , Trout Creek trail 1645 Comment
  UCR261650  Herniaria hirsuta var. cinerea Ann Howald 2003-4-24 2317 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  UCR261649  Hesperevax sparsiflora var. sparsiflora Ann Howald 2003-4-24 2319 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  UCD82619  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2887 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CHSC48598  Hesperolinon californicum Vernon Oswald 1986-5-12 2010 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. Common in a grassy opening on a serpentine slope. 487 Comment
  CHSC71435  Hesperolinon californicum Vernon H. Oswald; Lowell Ahart 1998-7-15 9269 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  JEPS32277  Hesperolinon californicum W. L. Jepson 1938-6-11 18988 Colusa on creek 4 mi se Wilbur Springs (sw Colusa Co.); Bear Creek Comment
  UC1212460  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4248 Colusa on State Hwy 20 ca 100 ft s origin of Wilbur Springs road; Inner North Coast Ranges, Bear Creek 320 Comment
  UC867722  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa on the grade about 3 mi w Leesville; Coast Range Comment
  SD51765  Hesperolinon congestum Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cooks Springs. 548 Comment
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Jul 18 2010
  UC1212515  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14301 Colusa slope between Fouts Springs Red Bridge Public Camp; Inner North Coast Ranges, Mendocino National Forest Comment
  UC1509756  Hesperolinon disjunctum C. M. Rogers 1972-7-5 13423 Colusa along Route 20 at Colusa-Lake County line Comment
  UCR45096  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CAS-BOT-BC176220  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa One mile beyond Wolf Glade on spur road, drainage of Stoney Creek, Mendocino National Forest 609 Comment
  RSA151789  Hesperolinon disjunctum H. K. Sharsmith 1959-5-27 4696 Colusa Colusa County: foot of grade on lower Lake to Williams road, W side Bear Valley. 427 Comment
Read comments
Jan 23 2009
  CAS-BOT-BC167448  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs 548 Comment
  RSA151706  Hesperolinon drymarioides H. K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs 549 Comment
  UC1212301  Hesperolinon drymarioides Helen K. Sharsmith 1953-7-1 4407 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD82742  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2923 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  RSA0069334  Heteranthera dubia Dean W. Taylor 2014-5-18 21476 Colusa 3.5 miles southwest of Maxwell; eastern bank of the Glenn-Colusa Canal downstream of the crossing of Fairview Road. 36 Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  RSA0072452  Heteromeles arbutifolia Michael A. Vincent, Robert M. Rhode 1996-3-30 7296 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  POM312312  Hibiscus H. L. Mason 1945-7-11 12649 Colusa Alkali plains near Butte Creek; Butte Lodge Outing Club, three miles above Colusa Comment
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  UC931960  Hibiscus lasiocarpos Verne Grant and Alva Grant 1946-8-6 7837 Colusa 1 mi. n. of Butte Outing Gun Club near Colusa (Butte Creek); Butte Creek Comment
  JEPS73514  Hieracium albiflorum L. R. Heckard 1972-7-10 3132 Colusa 3 mi nw Fouts Springs (near promontory on se corner of Snow Mt.); Snow Mt. 1828 Comment
  UCD133113  Hieracium greenei G. L. Stebbins Jr. 1964-7-4 6171 Colusa northeast side of Mt. St. John, west of Stonyford. 1524 Comment
  JEPS110110  Hirschfeldia incana Lowell Ahart 2006-8-9 13155 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC1563895  Holocarpha virgata subsp. virgata Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8875 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  UC725605  Holocarpha virgata subsp. virgata A. A. Heller 1940-6-7 15721 Colusa road to Sites; Lodogo Comment
  UCD164138  Hordeum brachyantherum Craig Thomsen 1997-4-20 1927 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD85417  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CAS-BOT-BC284931  Hordeum brachyantherum subsp. californicum Roxana S. Ferris 1926-4-22 6300 Colusa 2 miles west of Colusa Comment
  JEPS81292  Hordeum brachyantherum subsp. californicum L. R. Heckard and J. C. Hickman 1982-7-5 5904 Colusa s side Snow Mountain (slope below (s of) area, Summit Springs); s side Snow Mountain, Summit Springs 1500 Comment
  CAS-BOT-BC284988  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  UCD162991  Hordeum depressum Craig D. Thomsen 2000-4-28 2182 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC53989  Hordeum jubatum Vernon H. Oswald 1991-4-21 4526 Colusa Four Mile Rd, 1.9 mi north of Maxwell Colusa Rd. Roadside ditches in area of rice fields. 27 Comment
  UCD57281  Hordeum murinum subsp. glaucum Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3649 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  JEPS80220  Hordeum murinum subsp. leporinum L. R. Heckard and J. Hickman 1980-7-3 5376 Colusa w Summit Springs (sw slope Snow Mountain); sw slope Snow Mountain 1554 Comment
  CHSC83693  Hordeum vulgare L. P. Janeway 2002-4-24 7522 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD82589  Horkelia californica var. elata Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2734 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  JEPS80063  Hydrophyllum occidentale L. R. Heckard and J. Hickman 1979-6-15 5069 Colusa saddle between e and w peaks Snow Mt. 2103 Comment
  UC1051739  Hydrophyllum occidentale Helen K. Sharsmith 1953-6-20 4295 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  RSA730240  Hypochaeris glabra R. R. Halse 2007-3-25 7122 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. 100 Comment
  RSA0013873  Ibicella lutea John H. Thomas 1960-8-29 8847 Colusa About 11 miles SW of Williams along Highway 20. Comment
  CHSC71008  Iris macrosiphon Vernon Oswald; Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Rd. 2.2 mi west of Bear Valley Rd., 0.7 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  HSC31612  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  CDA19078  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958965 Colusa Sacramento Valley; At junction of I-5 Southbound and Hahn Rd, Williams. 0 Comment
  CDA19079  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958964 Colusa Sacramento Valley; Near the junction of I-5 Southbound and Husted Rd, Williams. 0 Comment
  CHSC32202  Ivesia gordonii James Jokerst 1980-8-8 1076 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  CHSC79769  Juglans californica var. hindsii L. P. Janeway; Caroline Warren 2000-4-6 6660 Colusa Vicinity of Lurline Creek and Standard Road. 51 Comment
  RSA30188  Juglans hindsii E. K. Balls, Percy C. Everett 1953-10-14 18670 Colusa Hwy 20, 10.5 miles SW of Williams on road to Clear Lake 183 Comment
Read comments
Jun 18 2011
  CHSC62909  Juncus balticus Vernon H. Oswald 1994-4-11 6104 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, at the SW corner of Tract 39. 25 Comment
  CHSC83445  Juncus balticus Bill Maslach 2001-6-6 12 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; 5 meters downstream of bridge marked '1930.' On creek bank. 175 Comment
  UCD65641  Juncus balticus Craig D. Thomsen 2000-4-28 2178 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC107173  Juncus balticus subsp. ater L. P. Janeway; B. Castro 2011-5-19 10284 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Eastern of the 2 Juncus patches at the south edge of the marsh, just above high water line. 50 Comment
  CHSC107947  Juncus balticus subsp. ater B. Castro; Amy Lyons 2011-2-9 1830 A Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 400 ft northeast of Tehama-Colusa Canal. Large +- saline/alkaline wetland/ seasonal marsh. Western of the two Juncus patches at the south edge of the marsh. 49 Comment
  HSC47739  Juncus bufonius Thomas W. Nelson, Jane Nelson 1978-4-29 3945 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCSB63777  Juncus bufonius var. bufonius Oswald, Vernon; Ahart, Lowell 1998-7-15 Colusa West side of county on Walker Ridge Rd; 8.2 mi south of Bartlett Springs Rd; 6.3 mi north of Hwy. 20; T14N R6W Sect. 12 Comment
  CHSC86963  Juncus bufonius var. congestus B. Castro; Michelle Cedarborg 2003-5-1 1425 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. In wet mud just downstream of pond at creek headwaters. 205 Comment
  JEPS75718  Juncus covillei L. R. Heckard 1974-9-9 3844 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  JEPS80387  Juncus covillei L. R. Heckard and J. Hickman 1981-6-22 5620 Colusa along Dark Hollow Creek Snow Mt. 1889 Comment
  JEPS110176  Juncus ensifolius Lowell Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS75719  Juncus ensifolius L. R. Heckard 1974-9-9 3850 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  JEPS73444  Juncus howellii L. R. Heckard 1972-7-8 3039 Colusa ridge running se of Snow Mt., West Peak 2011 Comment
  JEPS80285  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5459 Colusa ne slope West Peak (cirque area between peaks); Snow Mt. 2011 Comment
  UCD18851  Juncus mexicanus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 159 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC79616  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  CHSC118858  Juncus phaeocephalus var. paniculatus David Isle; Frank Pendell 2017-5-17 2174 Colusa Footheills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank andsheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile 381 Comment
  CDA31986  Juncus usitatus L. Ahart 2007-7-7 14258 Colusa South of the wire fence, on the south side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. Comment
  CHSC97128  Juncus usitatus Lowell Ahart 2007-7-7 14258 Colusa South of the wire fence, on the south side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  CHSC107157  Juncus xiphioides L. P. Janeway; B. Castro 2011-4-27 10246 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Generally lush grassland, almost flat upland around the marsh. 52 Comment
  CHSC91664  Juncus xiphioides G. D. Barbe; Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley. Along Goat Mountain Road, w of Lodoga-Stonyford Rd., Mendocino National Forest. Comment
  JEPS118670  Juncus xiphioides L. P. Janeway and B. Castro 2011-5-19 10289 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Comment
  SBBG119881  Juncus xiphioides L. Ahart 2006-8-9 13145 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  UCD63130  Juncus xiphioides Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4960 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  CDA20252  Juncus xiphioides G. D. Barbe, Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  UCD37190  Juniperus californica Beecher Crampton 1958-5-19 4804 Colusa Colusa County, 1.3 miles south of Lodoga. Comment
  UCD63029  Juniperus californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4681 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 501 Comment
  JEPS108915  Keckiella corymbosa Lowell Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  UCD72539  Keckiella lemmonii Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3830 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. East side of Bear Creek, just south of BLM parking lot (ca. 10 miles). 252 Comment
  JEPS73503  Kelloggia galioides L. R. Heckard 1972-7-10 3121 Colusa near Trout Crossing of trail to Box Springs (Snow Mt.); Snow Mt. 1828 Comment
  SEINET7075566  Koeleria macrantha A. G. Vestal 1955-4-5 s.n. Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  UCD164166  Koeleria macrantha Craig Thomsen 2001-5-6 2558 Colusa Wilbur Hot Springs. Comment
  UCD85747  Koeleria macrantha Beecher Crampton 1958-5-19 4801 Colusa 5.8 miles south of Lodoga. Comment
  CHSC80155  Lactuca saligna B. Castro; G. Kuenster 2000-7-19 1211 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low flat terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 39 Comment
  CAS-BOT-BC340495  Lactuca serriola Roxana Stinchfield 1916-7-11 477 Colusa Sycamore Slough road Comment
  CHSC112312  Lagophylla minor Lowell Ahart 2013-5-1 18680 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC70966  Lagophylla minor Vernon Oswald; Lowell Ahart 1998-5-7 8998 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  JEPS110184  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  OBI15966  Lagophylla minor Robert F. Hoover 1968-5-27 11098 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  RSA724937  Lagophylla minor L. Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30) about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UC638652  Lagophylla minor Ethel Crum 1938-5-8 2033 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD163715  Lagophylla minor Craig Thomsen 1999-5-10 2027 Colusa Colusa County. BLM Bear Creek Ranch. Near intersection of Hwy 16 and Hwy 20. About 0.5 miles south of Hwy 20. Comment
  UCR227339  Lagophylla minor Craig D. Thomsen 2000-5-11 2303 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  JEPS81971  Lagophylla minor Rimo Bacigalupi, T. Crovello, and L. Heckard 1965-4-26 9046 Colusa on road to Bartlett Springs 2 mi from Ladoga junction (summit w of Bear Valley, Colusa-Lake County boundary) 670 Comment
  UCD82369  Lagophylla minor Robin McMaster 1973-4-15 341 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  UCD82588  Lagophylla minor Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2733 Colusa Walker Ridge. Along Walker Ridge Rd., 3.5 mi N of Hwy 20. 1005 Comment
  CAS-BOT-BC341472  Lagophylla ramosissima Roxana Stinchfield 1916-6-22 313 Colusa College City Comment
  JEPS80191  Lagophylla ramosissima L. R. Heckard and J. C. Hickman 1980-7-3 5342 Colusa ca. 10 miles w Stonyford (just w of Summit Springs, sw of Snow Mt., Colusa-Lake County boundary) 1548 Comment
  UCD61466  Lagophylla ramosissima Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3912 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  UCR206352  Lagophylla ramosissima George K. Helmkamp, E. A. Helmkamp 2009-5-20 14740 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  CAS-BOT-BC341471  Lagophylla ramosissima Bruce G. Baldwin 1985-6-1 484 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  UCD135735  Lagophylla ramosissima Bruce G. Baldwin 1986-6-1 484 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  CAS-BOT-BC353480  Lasthenia fremontii A. A. Heller 1921-4-10 13546 Colusa Near Colusa Comment
  CHSC107951  Lasthenia fremontii B. Castro; T. Boullion 2011-4-20 1835 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites Comment
  HSC83436  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi N of jct with State Hwy 20 366 Comment
  UCR47942  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi north of jct with State Hwy 20 396 Comment
  CHSC29752  Lasthenia glabrata K. R. Stern 1980-4-1 6619 Colusa Vernal pool, south border area of Delevan National Wildlife Refuge. 48 Comment
  CDA32830  Lasthenia glabrata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC72114  Lasthenia glabrata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9529 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  HSC90077  Lasthenia glabrata C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 45 Colusa 100 m off Bear Valley Rd., 1.2 mi. S of junction with Walker Ridge Rd. 409 Comment
  CAS-BOT-BC328107  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa Tule land 3 miles W of Colusa Comment
  HSC96787  Lasthenia glabrata subsp. glabrata J. Carey, A. Hong, J. Leffingwell 1995-4-1 30 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  RSA293117  Lasthenia glabrata subsp. glabrata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9529 Colusa Bear Valley Road, 5 miles from its junction with State Route 20. 390 Comment
  UC583164  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi nw Rumsey 304 Comment
  CAS-BOT-BC353439  Lasthenia glabrata subsp. glabrata Ella Dales Cantelow 1936-4-11 1151 Colusa Jct. William Hy, Bear Creek Canyon Comment
  UCD82464  Lasthenia gracilis Craig Thomsen; G. Harrington 2009-5-12 2841 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD67932  Lasthenia gracilis Greg Vita 1978-4-7 1 Colusa Bear Valley, 10.3 mi. N. of State Route 20. Open grassland with full sun. 396 Comment
  CHSC53935  Lasthenia minor Vernon H. Oswald 1991-4-21 4527 Colusa Four Mile Rd, 3.1 mi south of Norman Rd, west-southwest of Princeton. Along the edge of the road. 27 Comment
  JEPS80130  Lathyrus brownii L. R. Heckard with J. Hickman 1980-7-1 5289 Colusa 10 mi w of Stonyford (Trail from Summit Springs to Frog Lake, Snow Mountain); Snow Mountain 1767 Comment
  CHSC116580  Lathyrus jepsonii B. Castro; Tom Boullion 2015-6-15 17336 /4/20 Colusa Sacramento Valley. CA 5 air mi N of colusa, ca 0.5 mi E of Hwy 45 off N edge of Reservation Road. On upper terrace within levee, overlooking a riprap-lined bend in the Sacramento Rier (Rivermile ~154.3). 16 Comment
  JEPS80788  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1981-7-30 5761 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1584 Comment
  CHSC62933  Lathyrus vestitus var. vestitus Vernon H. Oswald; Lowell Ahart 1994-4-6 6070 Colusa Goat Mtn. Rd. 0.3 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. 487 Comment
  CAS-BOT-BC323885  Layia chrysanthemoides Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 44 Colusa Along Bear Valley Rd. 1.2 miles S of the junction with Brim Rd. 414 Comment
  CAS-BOT-BC323886  Layia chrysanthemoides Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-4-1 010 Colusa On Bear Valley Road, 1.2 miles S of junction with Brim Road. 414 Comment
  CDA11406  Layia chrysanthemoides G. F. Hrusa, K. van Katwyk 1995-4-22 12127 Colusa Inner North Coast Ranges; Bear Valley, 15 m. N of Hwy. 20. Comment
  CHSC82611  Layia chrysanthemoides Tara Morgan 2002-4-6 16 Colusa Found in Bear Valley located west of Highway 5 and north of Highway 20 within pastures. 385 Comment
  CHSC83299  Layia chrysanthemoides Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  JEPS13437  Layia chrysanthemoides R. F. Hoover 1938-4-24 3221 Colusa Williams Comment
  JEPS39184  Layia chrysanthemoides W. I. Follette 1935-3-31 Colusa Williams Comment
  UC638649  Layia chrysanthemoides Ethel Crum 1938-5-8 2037 Colusa four mi s of Leesville; Bear Valley 426 Comment
  UC89163  Layia chrysanthemoides K. Brandegee Apr 1889 Colusa Leesville Comment
  UCD163702  Layia chrysanthemoides Craig Thomsen 1999-5-10 2014 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD15435  Layia chrysanthemoides Lisa Montang 1985-4-13 3 Colusa California, Colusa Co.; Bear Valley, 3.8 miles north of Wilbur Springs Road and Highway 20 intersection. 390 Comment
  UCR7836  Layia fremontii Marilyn Malin 1968-3-30 243 Colusa Coast Range, north side of Hwy 16, between Hwy 16 and Cache Creek at jct of Hwy 16 and Hwy 20 Comment
  HSC85782  Layia fremontii Jeff Dunk, Tallchief Comet, David Munger 1987-4-12 66 Colusa Comment
  UCD133896  Layia gaillardioides E. Jacqueline Garcia 1986-4-13 s.n. Colusa Bear Valley. 390 Comment
  CHSC27623  Layia platyglossa Timothy Spira; Robert Schlising 1978-5-13 3249 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (= Wilber Springs) Road. Field. Comment
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May 24 2013
  CHSC65801  Layia platyglossa L. P. Janeway; B. Castro, Linnea Hanson, Beth Corbin, Kim Earl 1995-4-28 4761 Colusa Southern end of Bear Valley just west of where the road crosses Bear Creek. 396 Comment
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May 24 2013
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  JEPS119416  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14358 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa Comment
  UCD163306  Layia platyglossa Craig D. Thomsen 1997-4-20 1909 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  CAS-BOT-BC380897  Layia platyglossa Ethel Crum 1936-5-8 2036 Colusa Bear Valley 4 miles south of Leesville 426 Comment
  HSC85783  Layia platyglossa Bobbi Schnell, Leonel Arguello, Andrea Begnoche 1987-4-12 35 Colusa Off to the side of the Road in Bear Valley Comment
  SEINET11447842 Image available Layia platyglossa M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  JEPS13436  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UC638682  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa 4 mi ne of Rumsey; Comanche Hills 254 Comment
  UCR261679  Layia septentrionalis Ann Howald 2003-4-24 2316 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, south side of road to spillway 367 Comment
  POM313214  Leersia oryzoides H. L. Mason 1945-9-19 12715 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile above Colusa. Comment
  UCD138139  Lemna minuta Herbert L. Mason; Verne Grant 1946-8-6 12966 Colusa on Colusa-Marysville Highway, four miles south of Colusa, west side of Sacramento River. Comment
  CAS-BOT-BC527300  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Below Letts Meadow on road from Bear Creek to Foutes Spring 914 Comment
  CHSC79481  Lepidium dictyotum var. acutidens L. P. Janeway; B. Castro 2000-3-23 6636 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CHSC101071  Lepidium draba David W. Isle 2007-4-13 1633 Colusa East of Maxwell about 1 mile; south of Maxwell Rd. and east of Lyons Rd. in ditch between rice field east of Williams Dirk's shop. 30 Comment
  UCD63714  Lepidium draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20. Comment
  CHSC106232  Lepidium latifolium B. Castro; L. P. Janeway 2001-6-3 1255 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. Small strip of this species along old roadbed at head of the springs. 883 Comment
  UCR201550  Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14257 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CAS-BOT-BC89760  Lepidium latipes Roxana S. Ferris 1917-4-12 502 Colusa 4 miles east of Williams. Comment
  CDA24916  Lepidium latipes D. Brown 1977-5-5 Colusa Terhel Farms Inc., Williams. 0 Comment
  CHSC79001  Lepidium latipes var. latipes J. Marr; C. Warren, H. West, N. Wight, et al 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine/Funks Creeks. 121 Comment
  CAS-BOT-BC89886  Lepidium nitidum Roxana S. Ferris 1917-4-12 514 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC89887  Lepidium nitidum Roxana S. Ferris 1917-4-19 694 Colusa Sycamore Slough, roadside. Comment
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  UC1100305  Leptochloa fascicularis Herbert L. Mason and Verne Grant 1946-8-6 12962 Colusa pond on Colusa-Marysville Hwy 4 mi s Colusa (w side of Sacramento River) Comment
  CHSC25167  Leptosiphon acicularis Willis Ball 1970-4-4 96 Colusa 10 miles W. of Williams. Beside Highway 20. Comment
  CHSC27551  Leptosiphon bicolor Scott E. Patton 1978-4-9 6 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 m wsw of Williams. 143 Comment
  UCD162985  Leptosiphon bicolor Craig D. Thomsen 2002-4-4 2584 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163676  Leptosiphon bicolor Craig Thomsen 1999-4-15 1977 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD64434  Leptosiphon bicolor Craig D. Thomsen 2001-4-12 2460 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  HSC85934  Leptosiphon bicolor Michalski, Raum, Hopson 1987-4-12 61 Colusa Side of Leesville-Williams Rd. Comment
  CHSC23879  Leptosiphon ciliatus G. E. Bowen 1971-3-27 11 Colusa 11 mi. w of Williams, n side of road, about 10 yards. 213 Comment
  RSA589922  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7291 Colusa Along Bear Valley Rd., 2.5 mi N jct. Wilbur Springs Rd. Comment
  HSC90410  Leptosiphon latisectus Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 64 Colusa 6 mi. E of intersection between Walker Ridge Rd. and Bear Valley Rd. 293 Comment
  UCD118848  Leptosiphon latisectus Robert E. Preston 1995-3-26 724 Colusa mi west of Stonyford, 0.25 mile north of North Fork campground. Comment
  CHSC19694  Leptosiphon parviflorus L. A. Wright Jr. 1971-3-27 10 Colusa Ca. 7 mi w of Williams on Hwy 20, off the s side of the road about 150 ft, in a meadow next to a stream. 91 Comment
  UCD163234  Leptosiphon parviflorus Craig D. Thomsen 2001-4-12 2440 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCR261672  Leptosiphon pygmaeus subsp. continentalis Ann Howald 2003-3-26 2294 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  NY180585  Lessingia nemaclada M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  UCD66535  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CAS-BOT-BC341800  Lessingia nemaclada M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  JEPS24542  Lessingia nemaclada Peter H. Raven and R. Snow 1959-9-11 14425 Colusa about 2 mi se Happy 762 Comment
  CHSC112640  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  RSA700360  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  RSA758207  Lessingia ramulosa Doug Goldman 2005-7-23 3569 Colusa East side of Wilbur Springs Road, about 1.35 miles west of the intersection with Bear Valley Road and just east of Sulphur Creek. Wilbur Springs Resort. 415 Comment
  UC2014145  Lessingia ramulosa Ellen Dean, C. Thomsen, T. Hansen, windfarm meeting 2010-6-11 6145 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  UCD55454  Lessingia ramulosa Ellen Dean; Gordon Harrington 2006-10-6 3278 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCD61472  Lessingia ramulosa Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3918 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCD66698  Lessingia ramulosa Craig D. Thomsen 2000-6-23 2400 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66708  Lessingia ramulosa Craig D. Thomsen 2001-5-24 2507 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.17 and 2.25. 342 Comment
  UCD84547  Lessingia ramulosa Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6145 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  JEPS43214  Lewisia rediviva W. L. Jepson 1932-5-7 16280 Colusa Lodoga 457 Comment
  UCD81857  Lewisia rediviva Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5741 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  JEPS15551  Lewisia triphylla G. Thomas Robbins with L. R. Heckard 1956-7-25 3708 Colusa meadow along trail due s, skirting e base of ridge forming Snow Mt. West Snow Mt. East; Snow Mt. West 1981 Comment
  CDA32489  Leymus triticoides W. C. Disney Jr. 1959-5-8 2344 Colusa Princeton area 0 Comment
  CHSC75651  Lilium pardalinum subsp. pardalinum Vernon H. Oswald; Lowell Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  UCD143419  Linanthus Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  UCD82495  Linanthus Craig Thomsen; G. Harrington 2009-5-12 2845 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  IRVC29626  Linanthus Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5023 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  SEINET7096751  Linanthus ciliatus A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 miles south of Route 20 and near Bear Creek. NAD27, 39? deg. 00' 36ao, -122?_ 21' 22ao (converted to WGS84 decimal degrees) Comment
  UC71654  Linanthus ciliatus Miss Alice King 1905-1 Colusa College City Comment
  SEINET12318341  Linanthus ciliatus K. D. Whitney, Stern, K. R. 1978-1 21 Colusa 11 mi WSW of Williams, Salt Canyon, N side of Salt Creek, Hwy 20 143 Comment
  JEPS86704  Linanthus rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6697 Colusa 0.5 km w Summit Springs (sw flank of mtn., Colusa-Lake County line); Snow Mtn. 1500 Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  CAS-BOT-BC432295  Lithophragma campanulatum Helen K. Sharsmith 1953-7-1 4403 Colusa above Linger Longer Camp, Goat Mountain, Mendocino National Forest 1615 Comment
  UCD102676  Lithophragma campanulatum A. M. Shapiro 1994-6-12 s.n. Colusa Below Steel Trap Rock, vicinity of Goat Mtn. (close by to the south of the rock). 1310 Comment
  JEPS80090  Lithophragma glabrum L. R. Heckard with J. Hickman 1979-6-16 5098 Colusa nw of West Peak Snow Mt. (s end of Milk Ranch meadow); , , s end of Milk Ranch meadow 1950 Comment
  UCD57556  Lolium multiflorum Andrew Pedersen; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  UCR233445  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  RSA424750  Lomatium Aaron Liston, M. Blumler 1987-4-26 667 -7 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD143424  Lomatium Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  UCD80967  Lomatium californicum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5292 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. South side of canyon that is located to the north of Brophy Canyon. 274 Comment
  UC71660  Lomatium dasycarpum subsp. tomentosum Miss Alice King 1905-1 Colusa College City Comment
  UC1073298  Lomatium hooveri George B. Rossbach 1955-4-9 374 Colusa on Route 20 w. edge Colusa Co. 563 Comment
  UC903739  Lomatium hooveri Milo S. Baker 1947-4-6 11646 Colusa near Hwy. 20 ca. 1 mi. e. Lake-Colusa Co. line Comment
  UCD56662  Lomatium hooveri Sam Bledsoe 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  UCD150867  Lomatium hooveri Clinton C. Shock 1980-5-3 73 Colusa Walker Ridge, 14.6 miles north of State Highway 20, at intersection with road to Bear Valley. 670 Comment
  CHSC81209  Lomatium macrocarpum L. P. Janeway; Gail Kuenster 2001-3-27 6990 Colusa Vicinity of Sites, Lurline Creek, and Sulphur Gap. 384 Comment
  HSC72294  Lomatium macrocarpum J. P. Smith, Thomas Nelson, Jane P. Nelson 1978-4-2 9545 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  JEPS121106  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa On the N side of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  SEINET11263259  Lomatium macrocarpum Richard R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 miles S of Logoda. Indian Valley.; 0 425 Comment
  SEINET8693961  Lomatium macrocarpum R. R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 mi S of Logoda; Indian Valley. 425 Comment
  CDA33696  Lomatium marginatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC77720  Lomatium marginatum var. purpureum B. Castro; M. A. Griggs, L. P. Janeway, B. Hendrickson 1999-4-12 875 Colusa About 8 miles NW of Maxwell, vicinity of Peterson Rd and Logan Ridge. 134 Comment
  CHSC77910  Lomatium marginatum var. purpureum Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Sites and Stone Corral Creek. 121 Comment
  SEINET13944634 Image available Lomatium tomentosum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  JEPS17551  Lomatium utriculatum W. L. Jepson 1920-5-23 8968 Colusa near Leesville (Bear Valley, w. Colusa Co.); w. Colusa Co., Bear Valley Comment
  UC630426  Lomatium utriculatum Annetta Carter 1938-5-8 1393 Colusa 6 mi S of Leesville (Bear Valley, Wilbur Springs road); Inner North Coast Range 426 Comment
  UCD163304  Lomatium utriculatum Craig D. Thomsen 1997-4-7 1895 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD163680  Lomatium utriculatum Craig Thomsen 1999-4-15 1981 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD63113  Lonicera interrupta Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4944 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 384 Comment
  CHSC48018  Lonicera involucrata var. ledebourii Vernon Oswald 1984-7-20 1618 Colusa Letts Lake in Mendocino National Forest. Comment
  CHSC86839  Lotus corniculatus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  JEPS60203  Lotus crassifolius var. crassifolius L. R. Heckard 1969-5-29 2239 Colusa about 6.5 mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  RSA516410  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road (about 6-1/2 air miles southeast of Stonyford). 1128 Comment
  RSA424761  Lotus humistratus Aaron Liston, M. Blumler 1987-4-26 668 -6 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UC726262  Lotus humistratus A. A. Heller 1940-6-7 15714 Colusa e of Lodogo (on the Lodogo-Sites road, near the foot of the grade) Comment
  RSA138209  Lotus micranthus Volney Rattan 1884 Colusa Fonts Spring Comment
  JEPS110105  Lotus purshianus var. purshianus Lowell Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS110414  Lotus purshianus var. purshianus Lowell Ahart 2006-8-9 13112 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCR225395  Lotus scoparius Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5113 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail 551 Comment
  UCD65955  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 67 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. Glenn-Colusa Irrigation District West Lateral Canal at western refuge boundary, public auto tour route. 13 Comment
  UC726672  Lupinus A. A. Heller 1940-4-21 15542 Colusa along U.S. Highway #99W, 2 mi s Williams Comment
  HSC40211  Lupinus albifrons J. P. Smith, Thomas W. Nelson 1976-4-14 8580 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD105904  Lupinus albifrons Beecher Crampton 1975-4-21 9163 Colusa 1.5 miles southeast of Sites. Comment
  UCD56933  Lupinus albifrons Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3535 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  RSA590140  Lupinus albifrons var. albifrons M. A. Vincent 1996-3-30 7277 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct Wilbur Springs Rd. Comment
  CAS-BOT-BC196036  Lupinus albifrons var. collinus A. Burgard; J. Goldsmith; J. Kalt 1996-5-4 78 Colusa 2.4 miles west of Bear Valley Rd. 12.4 miles on Walker Ridge Rd. from Hwy 20 to Brim Rd. 57 miles east of Hwy. 101 on Hwy. 20 524 Comment
  JEPS80129  Lupinus albifrons var. collinus L. R. Heckard with J. Hickman 1980-7-1 5288 Colusa ca 10 mi w Stonyford (on trail from Summit Springs to Frog Lake, Colusa-Lake County boundary); Snow Mt., trail fr Summit Springs to Frog Lake 1706 Comment
  JEPS95421  Lupinus albifrons var. collinus Vernon H. Oswald and L. Ahart 1994-3-23 6022 Colusa T17N R6W NW1/4 NW1/4 Sec. 31, 1610 ft, Chaparral. Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford 490 Comment
  SD58255  Lupinus albifrons var. collinus Stanton A. Cook 1959-5-30 891 Colusa Ridge below and to the north of the summit of Goat Mountain. 1829 Comment
  UCD83747  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 a Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  CDA11420  Lupinus bicolor G. F. Hrusa, K. van Katwyk 1995-4-22 12141 Colusa Inner North Coast Ranges; Side of Leesville Rd. approx. 4 m. NW of Hwy. 20. Comment
  CHSC86866  Lupinus bicolor B. Castro 2003-3-25 1403 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On ridgetop. 167 Comment
  HSC36907  Lupinus densiflorus var. aureus John Rehling, Robert M. Specht 1976-3-26 172 Colusa 2 1/2 mi. E of Leesville on the Leesville Rd. to Williams Comment
  SEINET12161687  Lupinus densiflorus var. aureus Unknown 1977-1 20 Colusa ca 10 m N of Salt Creek, Salt Canyon, Hwy 20, 16kmWSW of Williams. WilburSpringsQuad. seebelow 143 Comment
  SEINET9296972  Lupinus densiflorus var. densiflorus Unknown 2009-5-20 14736 Colusa Glasscock Mountain Comment
  NY15886  Lupinus formosus var. robustus A. A. Heller 1902-5-20 5573 Colusa Near College City Comment
  RSA0003424  Lupinus formosus var. robustus A. A. Heller, H. E. Brown 1908-5-20 s.n. Colusa Near College City. Comment
  UCD107778  Lupinus formosus var. robustus D. E. Breedlove 1963-4-20 4624 Colusa 11 miles W of Arbuckle on the Rumsey-Arbuckle Road. Comment
  CHSC106710  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Road to Goat Mt Lookout, 0.4 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1371 Comment
  CHSC78515  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads. 411 Comment
  CHSC84200  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the east and west side of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. 379 Comment
  JEPS65094  Lupinus microcarpus var. densiflorus W. L. Jepson 1932-5-7 16264 Colusa valley above Venado; Venado (valley above) 304 Comment
  UCD57462  Lupinus microcarpus var. densiflorus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3642 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Mouth of Craig Canyon, along unimproved road. 316 Comment
  UCD108711  Lupinus microcarpus var. densiflorus A. A. Heller 1919-5-10 13110 Colusa grade east of Leesville. Comment
  CHSC29255  Lupinus microcarpus var. microcarpus Gary McGrath 1977-4-16 9 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. 143 Comment
  UCD57053  Lupinus microcarpus var. microcarpus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3641 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UCR212341  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  SEINET12165154  Lupinus milo-bakeri Unknown 1985-1 50656 Colusa Bear Vly. W of Williams 404 Comment
  UC73206  Lupinus nanus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley, near College City Comment
  HSC45734  Lupinus polycarpus M. Alcasas 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC86906  Lupinus subvexus var. subvexus Terry Hines, Ellen Purcell, N. Williams 1988-4-17 58 Colusa 1.3 mi. S on Bear Valley Rd. from corner of Brim Rd. 396 Comment
  CHSC27819  Lupinus succulentus Laurie L. Pate 1978-4-8 87 Colusa 5.1 mi w of Walker Ridge Road, Hwy 20. 457 Comment
  SD239748  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites. 92 Comment
  UCD56925  Lupinus succulentus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3528 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CHSC115620  Lupinus succulentus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2152 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  SEINET10489004  Lupinus succulentus Thomas W. Nelson, Jane P. Nelson 1978-4-2 Nelson 9550 Colusa Bear valley road, 1.3 mi from its jct with state route 20. Serpentine Chaparral with digger pine. 366 Comment
  SEINET12161340  Lupinus succulentus D. M. Burk 1978-1 87 Colusa 5.1miW of Walker Ridge Rd, Hwy 20. Wilbur Springs Quad 15'. S35 T14N R6W 457 Comment
  RSA74314  Lycopus americanus Milo S. Baker 1946-9-5 11628 Colusa Along Hwy in water ditch betw Colusa & Williams. Comment
  CHSC107290  Lythrum californicum L. P. Janeway; B. Castro 2011-7-9 10509 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Edges of swale feeding south side of the marsh; at the only spot of bulrush. 49 Comment
  CHSC47439  Lythrum californicum Lowell Ahart 1980-6-11 2371 Colusa On the east side of River Road, where the road dips and floods during high water, about 9 1/2 miles north of Colusa. 30 Comment
  UCD102989  Lythrum californicum Dick Johnson 1977-6-15 s.n. Colusa West of Williams rangeland. Comment
  JEPS108741  Lythrum hyssopifolia Lowell Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD67076  Lythrum hyssopifolia E. Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5101 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  CHSC86784  Lythrum tribracteatum Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. 103 Comment
  JEPS104406  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  UC1191584  Lythrum tribracteatum Herbert L. Mason 1945-7-11 12645 Colusa 3 mi above Colusa (near Butte Creek, Butte Lodge Outing Club); Butte Lodge Outing Club Comment
  UC1609445  Lythrum tribracteatum Vernon H. Oswald and Lowell Ahart 1993-5-27 5429 Colusa 0.5 mi nw of Sites (bordering the w side of Sacramento Valley, Sites-Lodoga Road); Sacramento Valley, Sites-Lodoga Road 121 Comment
  UCD66865  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5068 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  RSA0016023  Lythrum tribracteatum Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UC1543163  Madia citriodora Charlotte G. Nast 1936-4-17 147 Colusa Williams to Lake Co. Road; Williams to Lake Co. Road Comment
  UC638653  Madia citriodora Ethel Crum 1938-5-8 2031 Colusa 3 mi n Leesville 426 Comment
  JEPS80798  Madia elegans L. R. Heckard and J. C. Hickman 1981-7-30 5768 Colusa about 100 ft above on n side Trout Creek (se side of mountain); Snow Mt. 1554 Comment
  UCD162973  Madia elegans Jack Major 1963-5-4 s.n. Colusa Bear Valley in grassland at south end of the valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  CAS-BOT-BC342679  Madia elegans Walter Knight; Irja Knight 1963-9-23 103 Colusa Near Stony Ford Comment
  JEPS108735  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC48178  Madia elegans subsp. elegans Vernon Oswald 1986-6-30 2174 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  RSA784858  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 sn Colusa Bear Valley Rd, 9.5 mi N of Old Wilbur Rd turnoff 122 Comment
  CHSC79466  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1106 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 216 Comment
  CHSC79467  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1111 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  RSA755624  Madia exigua George K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  CHSC101645  Madia gracilis David W. Isle 2003-5-15 1630 Colusa Mendocino National Forest; about 6 mi. W of Stonyford; N aspect serpentine chaparral slope S of (M-10) (18N01.2) and just W of OHV Trail 30 (18N78) jct. On August 8, 2001 Trough Fire Burn Site. MDB and M. 585 Comment
  CHSC86127  Madia gracilis Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 121 Comment
  UCD135665  Madia gracilis Bruce G. Baldwin 1985-6-1 483 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  UCD163226  Madia sativa Craig D. Thomsen 2000-5-30 2260 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66442  Madia sativa Craig D. Thomsen 2000-4-28 2191 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD139118  Maianthemum stellatum J. M. Tucker; L. K. Mann 1959-5-30 3529 Colusa Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1219 Comment
  JEPS121749  Malacothamnus fremontii David Isle, Ronda Isle 2013-6-23 2044 Colusa COLUSA County, CA. Just E of Maxwell Grade Summit and pass; hot burned S aspect slope N of Sites Lodoga Road. (At Grapevine Pass). Comment
  POM282851  Malacothamnus helleri Lyman Benson 1933-6-26 4488 Colusa Abbott mine. 549 Comment
  CDA11410  Malacothrix floccifera G. F. Hrusa, K. van Katwyk 1995-4-22 12131 Colusa Inner North Coast Ranges; Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC110848  Malacothrix floccifera David Isle; Rhonda Isle 2013-5-19 2042 Colusa Little Stony Creek Watershed. 0.1 mi W of Maxwell Grade Summit; Burned NW asp. S of Sites Lodoga Road. Alluvial terrace of eph. drainage; 7/12 Sites Fire Area GPS 10S 0546355E 4355688N. 548 Comment
  CHSC27868  Malacothrix floccifera Robin Ondricek 1978-4-8 5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC48167  Malacothrix floccifera Thomas W. Nelson, Jane P. Nelson 1978-4-29 3931 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  UCD66682  Malacothrix floccifera Craig D. Thomsen 2000-5-11 2309 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  RSA135416  Malacothrix floccifera Volney Rattan 1884-1 s.n. Colusa [no location specified] Comment
  RSA726801  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UC18824  Malvella leprosa Robert Cosmer 1900-8-27 Colusa Colusa Comment
  SEINET6669708  Marah fabacea R. R. Halse 2014-3-25 9029 Colusa Along the Sites-Logoda Road about 4.7 miles northeast of Logoda; on the west end of Grapevine Pass 527 Comment
  SEINET7254189 Image available Marah fabacea Richard. R. Halse 2014-1 9029 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of logoda; on the west end of Grapevine Pass 527 Comment
  UC71659  Marah fabacea Miss Alice King 1905-1 Colusa College City Comment
  POM284892  Marah fabacea Lyman Benson 1935-3-27 6337 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  JEPS95245  Marah watsonii Steve Edwards 1996-4-26 Colusa Walker Ridge NE of Barrel Springs, on serpentinite scree visible immediately S of Brim Grade, E of Walker Ridge Road and not far below the latter in elevation Comment
  SEINET8551368  Marah watsonii R. R. Halse 2014-3-25 9031 Colusa W end of Grapevine Pass, along the Sites-Logoda Road, ca 4.7 miles NE of Logoda. 527 Comment
  UCD66594  Marah watsonii Craig D. Thomsen 2000-4-28 2241 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  POM174574  Marah watsonii Roxana S. Ferris 1926-4-23 6593 Colusa On Grapevine Grade; Stonyford-Sites Road. Comment
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CAS-BOT-BC348045  Matricaria discoidea Roxana S. Ferris 1917-4-19 693 Colusa Sycamore Slough Comment
  UCD107748  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Slopes of Little Stoney Creek, Mendocino National Forest. Inner north coast ranges. 762 Comment
  UCD63031  Medicago minima Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  SEINET255529  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCD81219  Medicago polymorpha Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5556 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  POM276582  Medicago polymorpha Lyman D. Benson 1933-4-16 4337 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  RSA746964  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SEINET3260185 Image available Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley; along CA-20, 0.2 mile east of the Sutter County line. 9 Comment
  UCD107925  Medicago sativa Beecher Crampton 1963-8-5 6873 Colusa 3.5 miles south of Grimes. Comment
  CHSC79416  Melica californica B. Castro; L. P. Janeway 2000-4-10 1066 Colusa Vcinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek. 121 Comment
  CHSC79629  Melica californica B. Castro; L. P. Janeway 2000-5-4 1132 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 268 Comment
  UCD86456  Melica californica Beecher Crampton 1958-4-21 4728 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  JEPS80810  Melica harfordii L. R. Heckard and J. C. Hickman 1981-7-31 5783 Colusa Fouts Springs Overlook Snow Mt. (e side of Snow Mt.) 1813 Comment
  UCD57297  Melica torreyana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3668 Colusa BLM Payne Ranch. Near junction of Craig and Thompson Canyons. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Upslope of unimproved road, above side branch of Craig Canyon, downslope of saddle separating Craig and Thompson Canyons. 370 Comment
  UCD88843  Melica torreyana Beecher Crampton 1958-5-19 4816 Colusa West of Lodoga. Comment
  POM20221  Melilotus albus Roxana Stinchfield 1916-7-9 403 Colusa Overflow land along Sacramento River, Phillips Ranch. Comment
  RSA718054  Mentha arvensis L. Ahart 2006-8-9 13090 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  CHSC94453  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724894  Mentha spicata var. spicata L. Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS80116  Mentzelia dispersa L. R. Heckard with J. Hickman 1980-7-1 5274 Colusa Flat at summit of East Peak. Snow Mt.; Colusa-Lake County Boundary 2148 Comment
  JEPS95646  Mentzelia dispersa Vernon H. Oswald and L. Ahart 1999-6-22 9778 Colusa Lily Pond near Upper Letts Lake west of Stonyford: T17N R8W Sect. 24, ca. 4080 ft, mixed coniferous forest 1243 Comment
  CHSC94314  Mentzelia laevicaulis Lowell Ahart 2006-8-9 13109 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  UCD163656  Mentzelia laevicaulis Craig Thomsen 1998-6-10 1954 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC1051549  Mentzelia laevicaulis var. laevicaulis Helen K. Sharsmith 1953-6-21 4306 Colusa ca 1 mi within boundary of Mendocino National Forest (Slopes of Little Stoney Creek); Inner North Coast Ranges 670 Comment
  UCD170080  Mentzelia micrantha Jack Alderson 2016-5-14 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5500 feet (1675 m) south of the intersection of Highway 20 and the Colusa County line. 499 Comment
  UCD117375  Mentzelia micrantha K. Esau 1934-5-6 s.n. Colusa above Williams Tahoe-Ukiah Highway. Comment
  POM174563  Micropus californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit on grade. Williams- Stonyford Road Comment
  UCR261642  Micropus californicus Ann Howald 2003-4-23 2310 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  SEINET5710220  Micropus californicus Patricia Warne 1967-1 56 Colusa South end of Bear Valley by Bear Creek.; Bear Valley 390 Comment
  CAS-BOT-BC348362  Micropus californicus var. californicus Roxana S. Ferris 1917-4-14 573 Colusa Foothills 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC82608  Micropus californicus var. californicus Tara Morgan 2002-4-1 13 Colusa On the side of Bear Valley Rd. located northeast of Bear Creek south of Bear Valley. 350 Comment
  JEPS86623  Microseris L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6703 Colusa sw flank of mountain 0.5 km w Summit Springs (Colusa-Lake County line); Snow Mountain 1500 Comment
  UC75985  Microseris campestris Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC112209  Microseris douglasii subsp. douglasii Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC115388  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  CHSC81249  Microseris douglasii subsp. douglasii Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  UC133492  Microseris douglasii subsp. douglasii Katharine Brandegee April 1889 Colusa Leesville Comment
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  UCD163885  Microseris douglasii subsp. douglasii Craig D. Thomsen 2002-4-10 2598 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  UCD57294  Microseris douglasii subsp. douglasii Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3665 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD64514  Microseris douglasii subsp. douglasii Craig D. Thomsen 2000-4-12 2101 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD66860  Microseris douglasii subsp. douglasii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5063 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties, upslope of stock pond. 615 Comment
  CAS-BOT-BC348830  Microseris douglasii subsp. douglasii K. Curran 1889-4-1 s.n. Colusa Unspecified Comment
  CHSC81250  Microseris sylvatica L. P. Janeway; B. Castro 2001-4-26 7028 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 286 Comment
  CHSC112006  Microseris sylvatica David Isle 2005-10-7 2126 Colusa Pendell Ranch, S of Fouts Sps Rd 18N01 (M10), 2 mi W of Co Rd 306 Jct; In black adobe soil 150 yds S of Pendell home. 384 Comment
  UCD122620  Mimulus douglasii Kim E. Steiner 1978-3-30 175 Colusa Bartlett Springs Road, ca. 15.9 miles from State Highway 20 via Bear Valley Road. Comment
  JEPS110093  Mimulus floribundus Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD82134  Mimulus floribundus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5664 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UC1049541  Mimulus kelloggii Rimo Bacigalupi 1950-4-16 3105 Colusa vicinity Colusa-Glenn County line (ridge above Red Bridge Camp and the confluence of the North amd Middle Forks of Stony Creek); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  HSC96891  Mimulus layneae L. Ahart 2006-6-11 12664 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS14629  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  UCD15288  Mimulus microphyllus Claire Warshaw 1985-4-13 6 Colusa along Bear Valley Road, 8 miles norhtwest from intersection with highway 20. 390 Comment
  JEPS108814  Mimulus nudatus Lowell Ahart 2006-6-11 12663 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UC886310  Mimulus nudatus Alice Eastwood, John Thomas Howell 1938-5-16 5636 Colusa on road to Williams (Lake-Colusa county line) Comment
  UCD82576  Mimulus nudatus Craig Thomsen 2008-6-12 2766 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  RSA0118631  Mimulus pilosus Lowell A. Ahart 2013-10-1 19072 Colusa Strand of East Park Reservoir, about 2.5 miles (air) southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 365 Comment
  RSA724962  Mimulus pilosus L. Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD81729  Mimulus rattanii Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5731 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  JEPS10517  Mimulus tricolor Ruth Johnson 1915-4-6 Colusa College City Comment
  IRVC29627  Minuartia Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5024 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  CAS-BOT-BC388583  Minuartia douglasii Annetta Carter 1938-5-7 1377 Colusa Comanche Hills, 4 miles north of Rumsey, Inner North Coast Range 259 Comment
  CHSC77926  Minuartia douglasii Beth Hendrickson; Jean Witzman 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 152 Comment
  UC1613426  Minuartia douglasii Charles M. Belshaw 1937-4-25 2876 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD164031  Minuartia douglasii Indya Messier 2016-4-9 5 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. South of the corral at junction of 16 and 20, at the top of hill. 504 Comment
  UCD82137  Minuartia douglasii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5670 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  JEPS61324  Mirabilis greenei W. L. Jepson 1932-5-8 16299 Colusa n of Stonyford (w Colusa County) 365 Comment
  CHSC48491  Monardella odoratissima subsp. pallida Vernon Oswald 1984-7-20 1611 Colusa Near the Lily Pond n of Letts Lake in the Mendocino National Forest. 1280 Comment
  UC2042512  Monardella villosa Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Road 6.1 miles N from its intersection with Highway 30. Comment
  JEPS108809  Monardella villosa subsp. villosa Lowell Ahart 2006-6-11 12672 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS75863  Monardella villosa subsp. villosa L. R. Heckard 1974-9-10 3885 Colusa along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  JEPS15267  Monolopia major Rimo Bacigalupi with G. L. Stebbins, Calvin McMillan, Peter Kamb, and S. Galen Smith 1950-4-16 3118 Colusa base grade (Bartlett Springs road) (western edge of valley); inner edge of easternmost North Coast Ranges, Bear Valley 426 Comment
  SFV12204  Monolopia major J. M. Tucker 1968-5-4 4109 Colusa Bear Valley, middle of valley floor, 10 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 Comment
  UCD82631  Muhlenbergia asperifolia Jack Alderson 2009-8-6 27 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near confluence of Craig and Bear Creeks. 304 Comment
  CHSC89830  Muilla maritima B. Castro; S. Innecken 2001-3-20 1216 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 Comment
  CAS-BOT-BC83273  Myosurus minimus Roxana S. Ferris 1918-4-10 1443 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83278  Myosurus minimus A. A. Heller 1921-4-10 13545 Colusa Near Colusa. Comment
  UC1028301  Myosurus minimus George B. Rossbach 1955-4-9 270 Colusa 3 mi E of Maxwell; Sacramento Valley 18 Comment
  UC1101350  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa 3 mi e of Maxwell Comment
  UC1114806  Myosurus minimus Donald E. Stone Oct 26 1954-Sep 18 1955 7 -13 Colusa 3 mi e of city of Maxwell (on the Maxwell Road) Comment
  UC1738123  Myosurus minimus D. E. Stone 1955-5-2 7 -13 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  POM312436  Myosurus minimus subsp. apus H. L. Mason 1953-4-5 14510 -a Colusa 3 miles east of Maxwell Comment
  UC1101349  Myosurus minimus subsp. apus Herbert L. Mason 1953-4-5 14510 a Colusa 3 mi e of Maxwell Comment
  CHSC28129  Myosurus sessilis K. R. Stern 1979-5-5 Colusa Ca. 0.25 mi w of intersection of Hwy 20 and Int. Hwy 5. Vernal pool on n side of road, ca. 0.5 mi nw of Williams. 152 Comment
  POM312437  Myosurus sessilis H. L. Mason 1953-4-5 14510 Colusa 3 miles east of Maxwell Comment
  UCD96289  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  RSA63373  Najas graminea Milo S. Baker 1946-9-4 11600 Colusa Irrigation ditch, along eastern end, West Gridley Road, Butte Sink. Comment
  UC1100003  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-7-18 1007 Colusa 2.5 mi w of Williams Comment
  SEINET3237610  Najas guadalupensis subsp. guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  UCD87419  Nassella cernua Beecher Crampton 1958-5-19 4790 Colusa 10.7 miles southeast of Leesville. Comment
  CHSC85970  Nassella pulchra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CHSC88537  Nassella pulchra B. Castro 2003-5-15 1441 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Upper and mid-slope on steep E-facing side of S-trending canyon. 213 Comment
  UCD81229  Navarretia Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5566 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destanella Flat area on the S side of Hwy. 20. West side of Destinella Flat. 446 Comment
  UCD66983  Navarretia atractyloides Ellen Dean; Davis Botanical Society 2008-5-31 5057 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  JEPS70256  Navarretia cotulifolia W. L. Jepson 1920-5-23 8965 Colusa near Leesville (foot of Bartlett Grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  RSA424699  Navarretia eriocephala Aaron Liston, M. A. Blumler 1987-4-26 668 -5 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CHSC112919  Navarretia heterandra B. Castro; Robin Carter, Amy Lyons 2010-5-13 1806 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in distrubed, grazed annual grassland. 119 Comment
  CHSC79544  Navarretia heterandra B. Castro; L. P. Janeway 2000-5-3 1124 Colusa Vicinity of Sites, Huffmaster Rd, and Grapevine Creek. 371 Comment
  JEPS117020  Navarretia heterandra David Gowen 2008-5-24 924 Colusa West of Sites, heading up the hill on road to Ladoga, opposite driveway to #4826. Comment
  JEPS104075  Navarretia jepsonii Lowell Ahart 2003-7-14 10385 Colusa Field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  UC1552812  Navarretia jepsonii Frederica Bowcutt 1985-6-20 607 Colusa n of Hwy. 20; Walker Ridge Comment
  UCD61473  Navarretia jepsonii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3919 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCR261670  Navarretia jepsonii Ann Howald 2003-5-29 2346 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  UCR261754  Navarretia jepsonii Ann Howald 2003-5-31 2360 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  POM64861  Navarretia leucocephala subsp. leucocephala Roxana Stinchfield 1916-7-11 449 Colusa Colusa - Williams Road at Trough Comment
  UC963802  Navarretia leucocephala subsp. leucocephala Herbert L. Mason 1945-7-11 12646 Colusa 3 mi above Colusa (Butte Lodge Outing Club, Butte Creek); Butte Creek Comment
  UCD58121  Navarretia nigelliformis subsp. nigelliformis Ellen Dean; PLB 102 Class 2007-4-29 3717 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Above Thompson Creek. 381 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  JEPS70419  Navarretia pubescens W. L. Jepson 1932-5-7 16256 Colusa 1 mi above Venado Comment
  UCD72461  Navarretia pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3795 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  HSC90406  Navarretia sinistra subsp. pinnatisecta Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 49 Colusa 6 mi. E of intersection between Walker Ridge Rd. and Bear Valley Rd. 293 Comment
  UC1618098  Navarretia viscidula Donald G. Nelson 1940-6-9 Colusa Stoneyford Comment
  UCR78370  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa road to Goat Mtn Lookout, 2.2 mi. south of Route M-10 (Bear Creek - Fouts Spring Road) at head of S Fork of Stony Creek, c. 12 air mi. WSW of Stonyford 1500 Comment
  CHSC77936  Nemophila heterophylla Beth Hendrickson; Jean Witzman 1999-4-21 Colusa Vicinity of Antelope Valley and Sites. 137 Comment
  JEPS95489  Nemophila heterophylla Vernon H. Oswald and L. Ahart 1994-4-6 6058 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  SEINET7856709  Nemophila heterophylla R. R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCD169730  Nemophila heterophylla Richard R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  CHSC14017  Nemophila menziesii G. Notch 1974-3-30 122 Colusa Locally scattered along roadside ca. 0.5 mi w of jct of Hwys 20 and 16 on Hwy 20. 335 Comment
  JEPS3136  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  CHSC70890  Nemophila menziesii var. menziesii Vernon Oswald; Lowell Ahart 1998-4-21 8949 Colusa Rd. 401 1.8 mi north of Grapevine Pass on the Sites-Lodoga Rd. 472 Comment
  JEPS86600  Nemophila parviflora L. R. Heckard with P. C. Silva, R. L. Moe and M. Moe 1988-6-19 6707 Colusa 0.5 mi ne Summit Springs (1987 burn area (Garry oak area,) sw flank Snow Mountain, Colusa Lake Co. Line); sw flank Snow Mountain, ne of Summit Springs, Garry oak area 1700 Comment
  CDA16097  Nemophila pedunculata G. F. Hrusa 1999-5-16 15046 Colusa North Coast Ranges; Summit of Goat Mtn on N side, on road to Young's Corral, +/- 1/4 mi N of intersection to Goat Mtn Lookout. 1706 Comment
  UCD163210  Nemophila pedunculata Craig D. Thomsen 2000-3-31 2103 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD119932  Nemophila pedunculata J. M. Tucker; Ted Niehaus 1960-4-3 3584 Colusa 9.1 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  RSA0118880  Nicotiana acuminata var. multiflora Lowell Ahart 2013-10-1 19084 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UC71879  Nicotiana acuminata var. multiflora H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CHSC43374  Nicotiana glauca Lowell Ahart 1976-2-14 1006 Colusa Along a small stream, about 2 miles west of Sites. 182 Comment
  JEPS87759  Nicotiana glauca Vernon H. Oswald and Lowell Ahart 1994-3-23 6024 Colusa 1.8 mi w Stonyford-Lodoga Rd. (Goat Mtn Rd, s of Stonyford, between the road and Little Stony Creek) 487 Comment
  SEINET6174905  Nicotiana glauca R. R. Halse 2007-3-25 7123 Colusa Along State Hwy. 20 ca 7.8 miles NE of junction with State Hwy. 16 at base of Salt Canyon, 100 Comment
  CHSC113037  Nicotiana quadrivalvis Lowell Ahart 2013-10-1 19085 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS75712  Orobanche californica subsp. jepsonii L. R. Heckard 1974-9-9 Colusa Trail up from Summit Springs, Snow Mt. Comment
  CAS-BOT-BC7016  Orobanche grayana var. jepsonii Harley Pierce Chandler 1905-10-1 s.n. Colusa Princeton Comment
  SEINET8854072 Image available Orobanche grayana var. jepsonii H. P. Chandler 1905-1 s.n. Colusa Princeton Comment
  CAS-BOT-BC238372  Orthocarpus Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley 304 Comment
  POM298007  Orthocarpus lithospermoides var. bicolor A. A. Heller 1919-5-10 13116 Colusa W of Leesville. Comment
  SEINET10549700  Orthocarpus lithospermoides var. bicolor Mary Susan Taylor, E. Pierce 1981-5-17 Taylor 3757 Colusa On E side of Lodoga-Stonyford Rd, in wet meadow of Valley Grassland, ca. 1 mi S of Stonyford. 1100 ft. 335 Comment
  SEINET12270141  Orthocarpus lithospermoides var. bicolor A. Carter, Kellogg, L. 1953-1 3239 Colusa road to Leesville, 6 mi N of Wilbur Springs Junction 400 Comment
  UCD40886  Orthocarpus purpurascens G. Robinson 1984-4-21 3 Colusa About 50 yards west of Wilbur Springs Road on Bear Valley Road. 3.2 miles north of Hwy 20. 390 Comment
  UCD57070  Oryza sativa Beecher Crampton 1963-9-9 6894 Colusa 1/4 mile E of Cortena. Comment
  SEINET519285  Osmorhiza berteroi L. P. Janeway 1998-3-7 5710 Colusa Along Pacific Ridge Rd. (16N06) 0.5 mi E of road to Spanish Ridge and Hough Springs. 1052 Comment
  UCD70305  Packera breweri D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  CHSC75683  Packera clevelandii Vernon H. Oswald; Lowell Ahart 1999-6-22 9783 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 359 Comment
  JEPS105741  Packera clevelandii David Gowen 2004-6-24 134 Colusa South of Stonyford. Approx. 1.8 miles along Goat Mt. Road from its junction with the paved road to Stonyford. Comment
  UCD110420  Packera clevelandii Daniel Slakey; CNPS volunteers 2011-6-12 6 Colusa Walker Ridge. Wet meadow area on E side of Walker Ridge Rd. About 18 km N of Hwy.20 by road. 876 Comment
  UCD163313  Packera eurycephala Craig D. Thomsen 1997-4-13 1902 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC91676  Packera eurycephala var. eurycephala Brandegee May 1887 Colusa Epperson's Comment
  SFV12205  Packera eurycephala var. eurycephala J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, open valley floor, 8.6 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 Comment
  UCD66540  Packera greenei Craig D. Thomsen 2001-5-24 2518 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC94428  Panicum capillare Lowell Ahart 2006-8-22 13222 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  SEINET238367 Image available Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa 2 miles east of Maxwell. Comment
  RSA654746  Parnassia palustris var. californica G. Fred Hrusa 1994-11-7 11992 Colusa Frenzel Creek Research Natural Area. USFS. Little stony Creek at mouth of Frenzel Creek, approx. 2 miles above Stonyford-Lodoga Road. On Goat Mountain Road. 440 Comment
  UC71653  Pectocarya penicillata Miss Alice King 1905-1 Colusa College City Comment
  CHSC77918  Pectocarya pusilla Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  UC766994  Pectocarya pusilla R. F. Hoover 1938-4-23 3209 Colusa Upper Sand Creek Comment
  UCD57114  Pectocarya pusilla Gordon Harrington; Diana Hickson 2007-4-7 0018 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCR261665  Pectocarya setosa Ann Howald 2003-5-5 2329 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 0.25 mile west of intersection with Lodoga-Stonyford Road 394 Comment
  SEINET13753666  Pedicularis densiflora R. R. Halse 2014-3-25 9035 Colusa Along the Bear Valley Road ca. 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  RSA589938  Pedicularis densiflora Michael A. Vincent, Robert M. Rhode 1996-3-30 7304 Colusa Along Brim Road, 2.9 mi W jct Bear Valley Rd. Comment
  UCD66581  Pediomelum californicum Craig D. Thomsen 2001-5-24 2526 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS86608  Pellaea L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6711 Colusa 0.5 mi ne Summit Springs; sw flank Snow Mt 1650 Comment
  UCD70232  Pellaea mucronata D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 350 Comment
  CAS-BOT-BC77156  Pellaea mucronata subsp. mucronata Josh Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 39 Colusa Along Brim Rd. 1.6 miles west of the junction with Bear ValleyRd. (Robber's Flat) 487 Comment
  UC1212587  Penstemon heterophyllus Francia Chisaki, Helen K. Sharsmith 1959-5-26 1330 Colusa on road to Red Bridge Camp at North Fork of Stony Creek crossing; Inner North Coast Ranges, North Fork Stony Creek Comment
  SEINET12327201  Penstemon heterophyllus C. C. Freeman, Wetter, M. A. 1983-1 1891 Colusa 2.2 mi NNE of the jct of CA 20 & 16 in the foothills of the Sierra Cascades Comment
  HSC97535  Penstemon heterophyllus subsp. heterophyllus J. Carey, A. Hong, J. Leffingwell 1995-5-7 89 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  RSA407923  Penstemon heterophyllus subsp. purdyi Jens Clausen 1935-5-20 1009 Colusa Ca 12 mi SW of Williams on Barlett Springs Road. Comment
  UCD72388  Penstemon heterophyllus var. australis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5114 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 550 Comment
  UCD67126  Penstemon heterophyllus var. azureus Ellen Dean; Davis Botanical Society 2008-5-31 5056 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  JEPS7560  Penstemon heterophyllus var. heterophyllus W. L. Jepson 1920-3-23 8963 Colusa Mountainside above Venado (sw Colusa Co.); Mountainside above Venado Comment
  CHSC110836  Penstemon heterophyllus var. purdyi David Isle 1989-4-29 2004 Colusa Stony Creek Watershed. 0.9 mi SW of Stonyford Store; E side Lodoga-Stonyford Rd (Co Rd 306). 150' N of Jct w/Dennis Dr. 374 Comment
  UCD70233  Penstemon laetus subsp. sagittatus D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CAS-BOT-BC77144  Pentagramma triangularis subsp. triangularis Roxana S. Ferris 1917-4-14 559 Colusa Arbuckle - Rumsey Road, foothills 7 mi. west of Arbuckle Comment
  UC1532348  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near the Lily Pond and Letts Lake. 1188 Comment
  UCD61454  Perideridia kelloggii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3900 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just north of the headwaters of Eula Canyon. 339 Comment
  UCD63109  Perideridia kelloggii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4940 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  UCD82501  Perideridia kelloggii Craig Thomsen; G. Harrington 2009-5-12 2860 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CHSC116397  Perideridia kelloggii David Isle; Frank Pendell 2014-6-16 2135 Colusa North Coast Range. About 2 miles west of Stonyford on the Pendell Ranch. Southeast of the home of Frank and Sheri Pendell about 1/4 mile and northwest of the Stonyford Cemetery about 200 yards (GPS is Pendell home S of Fouts Springs Rd. ~50 yds. 10S -0536687E, 4357699N. Comment
  JEPS127597  Perideridia kelloggii David Isle with Frank Pendell 2014-6-16 2135 Colusa About 2 miles W of Stonyford on the Pendell Ranch. SE of the home of Frank and Sheri Pendell about 1/4 mile and NW of the Stonyford cemetery about 200 yards. Comment
  SEINET10545723  Perideridia kelloggii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 379 Colusa On Hwy. 20, 0.3 mi E of Lake County line. Comment
  CHSC80251  Persicaria punctata B. Castro; G. Kuenster 2000-7-19 1201 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal. 39 Comment
  CHSC32769  Phacelia corymbosa James Jokerst 1980-6-27 923 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  CHSC91556  Phacelia distans D. Isle 1995-4-30 392 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt. Rd., 5.1 mi. out from jct. with Stonyford-Lodoga Rd. and just W of Sullivan Creek Bridge. 475 Comment
  RSA794842  Phacelia distans D. Isle 2008-4-9 1934 Colusa Reese Place Duck Club (4498 2 Mile Road); approx. 4 miles northeast of Maxwell. 30 Comment
  CHSC7067  Phacelia divaricata M. I. Moore 1969-4-15 9 Colusa 19.3 mi w of Williams, Calif. s side of Hwy. 20. 182 Comment
  CHSC12748  Phacelia egena L. V. Ritter 1969-4-30 227 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. Comment
  CHSC32215  Phacelia egena James Jokerst 1980-8-6 1058 Colusa Near Snow Mountain (West). Comment
  UC73693  Phacelia egena Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UC901824  Phacelia egena L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3320 Colusa road cut 1 mi se Sites; Stone Corral Creek 76 Comment
  SD58509  Phacelia egena L. R. Heckard, C. R. Bell 1951-6-14 176 Colusa West facing serpentine slope near Stonyford. Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD56659  Phacelia imbricata Sam Bledsoe 2007-3-25 6 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 566 Comment
  UC1228287  Phacelia imbricata subsp. imbricata L. R. Heckard and C. R. Bell 1951-6-13 175 Colusa at base of cliff just n Stonyford Comment
  HSC62807  Phacelia tanacetifolia J. M. DiTomaso 1979-4-14 875 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  JEPS1305  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  UCD82733  Phacelia tanacetifolia Craig Thomsen; G. Harrington 2009-5-14 2914 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  HSC45512  Phacelia tanacetifolia M. Alcasas 1978-4-22 48 Colusa Bear Valley Rd., 2.3 mi. from Hwy. 20 419 Comment
  CAS-BOT-BC258849  Phalaris aquatica Alice Eastwood; John Thomas Howell 1940-6-10 7875 Colusa Williams Comment
  UCD88339  Phalaris brachystachys Beecher Crampton 1961-7-20 5936 Colusa 8 miles SE of Grimes. Comment
  CAS-BOT-BC265957  Phalaris minor Roxana S. Ferris 1926-4-22 6287 Colusa 3 miles west of Colusa Comment
  CHSC57170  Phlox gracilis R. W. McNulty 1983-4-9 1 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi se of Williams. 321 Comment
  JEPS71082  Phlox gracilis W. L. Jepson 1932-5-8 16276 Colusa Lodoga, w Colusa Co Lodoga 457 Comment
  UCR206397  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14370 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  CHSC20708  Phoradendron densum Robert A. Schlising; Glenn Keator 1962-1-31 2033 Colusa 426 Comment
  JEPS21852  Phoradendron densum John R. Swanson 1958-4-26 323 Colusa 2.8 mi. w. Bear Valley rd. (near Colusa-Lake Co. boundary, on rd. to Bartlett Springs) 670 Comment
  RSA0115434  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian. 20 Comment
  POM63850  Phyla nodiflora Roxana Stinchfield 1916-6-11 444 Colusa Willow Lake near Colusa -Williams Road. Comment
  JEPS24655  Physalis lancifolia J. H. Thomas 1960-8-30 8866 Colusa about 5 mi nw of College City (along road to Sycamore) Comment
  UCD126766  Physalis lancifolia John M. Tucker 1954-8-23 2746 Colusa 7 miles east of Arbuckle, just north of road east from Arbuckle. Comment
  CHSC105195  Pickeringia montana var. montana B. Castro; L. P. Janeway 1999-7-5 1017 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along N edge of USFS Rd 16N06, near top of Pacific Ridge. 1127 Comment
  UCD83751  Pinus attenuata Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5948 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  CDA580  Pinus sabiniana G. D. Barbe, T. C. Fuller 1986-3-6 4259 Colusa Steep bank below road grade, Leesville Grade, W of Williams. 0 Comment
  JEPS80465  Piperia colemanii Alice Q. Howard 1972-7-10 9 Colusa trail from Fouts Camp to Box Springs (the highest of two such areas on the n side of ridge separating Trout and Paradise Creeks); Snow Mountain 1676 Comment
  CHSC94297  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  UCD72389  Piptatherum miliaceum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5115 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UC71656  Plagiobothrys canescens Miss Alice King 1905-4-7 Colusa College City Comment
  UCR206386  Plagiobothrys canescens George K. Helmkamp, E. A. Helmkamp 2009-5-20 14750 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  UCR261659  Plagiobothrys distantiflorus Ann Howald 2003-3-25 2286 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2.1 miles southeast of Stonyford, near diversion canal inflow to reservoir 369 Comment
  UCD80898  Plagiobothrys fulvus Ellen Dean; w/ Destanella Flat Tour 2009-3-28 5298 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Destanella Flat, just E of the Lake County border, ca. 3.4 road miles west of Hwy 16 along Hwy 20, south side of Hwy 20. 560 Comment
  CHSC79100  Plagiobothrys greenei B. Castro; C. Warren 2000-4-3 1047 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 170 Comment
  UCD66939  Plagiobothrys greenei Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5088 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCR198136  Plagiobothrys humistratus Ellen Dean, Gordon Harrington, P. McIntyre 2007-3-16 3380 Colusa BLM Payne Ranch, along Hwy 20, Destanella Flat area just east of Lake Co. border, c. 3.4 road mi west of junction with Hwy 16. Along unimproved road that goes south from Hwy 20, c. 2.3 road mi west of junction with Hwy 16, unnamed valley with old building called 'Roadkill Cafe.' 415 Comment
  UC78155 Image available Plagiobothrys humistratus Katharine Brandegee 1888-4 Colusa Colusa Junction Comment
  UCD120840  Plagiobothrys humistratus Robert E. Preston 1995-6-2 868 Colusa Bear Valley Road. Comment
  POM174576  Plagiobothrys infectivus Roxana S. Ferris 1926-4-23 6412 Colusa Near Mountain House on the Williams-Stonyford Road. Comment
  HSC64006  Plagiobothrys nothofulvus J. P. Smith, Thomas W. Nelson 1976-4-14 8585 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD56901  Plagiobothrys nothofulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3504 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  POM163465  Plagiobothrys nothofulvus Roxana S. Ferris 1926-4-23 6418 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  CHSC29711  Plagiobothrys scriptus K. R. Stern 1980-4-3 6622 Colusa North central portion of Delevan National Wildlife Refuge. 48 Comment
  CHSC89828  Plagiobothrys scriptus B. Castro; L. Janeway 2001-5-2 1243 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak woodland. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  UC78102  Plagiobothrys shastensis unknown May 1886 Colusa Stites Comment
  RSA10707  Plagiobothrys stipitatus C. B. Wolf 1928-5-8 2124 Colusa Sacramento Valley. 3 mi. S of Arbuckle Comment
  UC78205  Plagiobothrys stipitatus K. Brandegee Apr 1889 Colusa Colusa Junction Comment
  POM287611  Plagiobothrys stipitatus Lyman Benson 1935-3-27 6340 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CHSC107976  Plagiobothrys stipitatus var. micranthus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1857 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  UC79383  Plagiobothrys stipitatus var. micranthus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  UCD18900  Plagiobothrys stipitatus var. micranthus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-17 151 B Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587286; 4336302. Comment
  UCD66938  Plagiobothrys stipitatus var. micranthus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5087 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCR206851  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14359 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  CHSC86873  Plagiobothrys stipitatus var. stipitatus B. Castro; Beth Hendrickson 2003-4-7 1416 Colusa Vicinity of Sites, Antelope Valley, and Salt Lake. 94 Comment
  JEPS61053  Plagiobothrys stipitatus var. stipitatus Alice King May 1906 Colusa College City Comment
  UCR212375  Plagiobothrys stipitatus var. stipitatus Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  HSC31306  Plagiobothrys tenellus Carter Schleicher 1974-5-4 23 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS95520  Plagiobothrys tenellus Vernon H. Oswald and L. Ahart 1994-4-6 6069 Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. Occasional populations in openings in brush on the rocky slopes (serpentine) bordering Sullivan Creek. 469 Comment
  UCR261652  Plagiobothrys tenellus Ann Howald 2003-4-24 2320 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CAS-BOT-BC60834  Planodes virginica Doris K. Kildale 1928-5-8 5017 Colusa 3 miles south of Arbuckle. Comment
  CHSC86843  Plantago coronopus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  CHSC94420  Plantago coronopus Lowell Ahart 2006-8-9 13154 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD18844  Plantago coronopus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 152 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587286; 4330302. Comment
  SD225882  Plantago elongata Carol Witham, Jennifer Buck and Vernal Pool Team 2001 2001-4-30 153 Colusa 2 mi south of the town of Colus along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786;4336302 Comment
  UCD18835  Plantago elongata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 142 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCD18845  Plantago elongata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 153 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCSC009428  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell 53 Comment
  CHSC57194  Plantago erecta Lisa J. Newsum 1984-3-31 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC71119  Plantago erecta Jan Monelo 1989-4-1 15 Colusa Ca 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  SEINET8665581  Plantago erecta R. R. Halse 2013-3-27 8761 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca 14.6 miles east of the junction of state Hwys. 20 and 53 558 Comment
  UCD124494  Plantago erecta J. M. Tucker 1960-4-3 3582 Colusa north side of State Highway 20, ca. 100 yards east of Lake-Colusa county line. Comment
  UCD64289  Plantago erecta Craig D. Thomsen 2000-3-31 2122 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82465  Plantago erecta Craig Thomsen; G. Harrington 2009-5-12 2842 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC45522  Plantago erecta M. Alcasas 1978-4-23 61 Colusa Bear Valley Rd., 2 mi. from Hwy. 20 442 Comment
  JEPS110111  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724960  Plantago major L. Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC93146  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Sycamore Slough. Stinchfield Ranch. Comment
  CHSC60119  Platystemon californicus Bryan Case 1988-4-9 128 Colusa Ca 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca 18 mi sw of Williams. 321 Comment
  CHSC81294  Platystemon californicus J. Trizzino 2001-3-31 19 Colusa Bear Valley Meadow along east side of Bear Valley Road near creek. 396 Comment
  UC125224  Platystemon californicus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC72707  Platystemon californicus Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  UCD96031  Platystemon californicus Beecher Crampton 1975-4-21 9170 Colusa 3.5 miles northwest of Lodoga (by road.) Comment
  UCD96073  Platystemon californicus Clinton C. Shock 1980-5-3 61 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  SD147978  Platystemon californicus L. Coats 1983-4-24 15 Colusa Along Bear Valley Road, 4.3 miles south of Bartlett Springs Road; next to a cattle pastuere along the roadside. Comment
  SEINET12091628  Platystemon californicus C. L. Eddy 1984-1 5 Colusa Ca 0.3 mi W of jct of Hwys 20 and 16, S side of Bear Creek, ca 16 m SW of Williams. Wilbur Springs 322 Comment
  SEINET8794142  Platystemon californicus K. Brandegee 1889-1 s.n. Colusa Colusa Junction [now Cortena]. Comment
  UCD13217  Platystemon californicus Steve Daniel 1986-4-13 10 Colusa California. Colusa Co. Bear Valley, 7.6 mi No of jct of Bear Valley Rd. and hwy 20. Elev. ca. 1300 ft. 396 Comment
  UCD14423  Platystemon californicus R. M. Rhode 1984-4-21 s.n. Colusa Colusa Co.; Bear Valley, 10 miles north of Intersection of Highways 16 and 20; 426 Comment
  UCD96066  Platystemon californicus Linda Osbourne 1980-4-12 12 Colusa 0.3 mile west of junction of Highways 20 and 16, south side of Bear Creek, 16 miles SW of Williams. 321 Comment
  UCD56915  Plectritis ciliosa Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3518 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD57101  Plectritis ciliosa Gordon Harrington; Diana Hickson 2007-4-7 0017 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCD66604  Plectritis ciliosa Craig D. Thomsen 2000-5-11 2281 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC62948  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald; Lowell Ahart 1994-4-6 6066 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS87663  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County Comment
  JEPS81274  Plectritis congesta L. R. Heckard and J. C. Hickman 1982-7-5 5884 Colusa below (south of) Summit Spring (s side of Snow Mountain); Snow Mountain 1500 Comment
  CDA13785  Plectritis macrocera G. F. Hrusa, K. van Katwyk 1995-4-22 12138 A Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 mi. N of Hwy 20, flowers near white. Comment
  CHSC62949  Plectritis macrocera Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 A Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat. S of Stonyford. 469 Comment
  JEPS16219  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  JEPS95488  Plectritis macrocera Vernon H. Oswald and L. Ahart 1994-4-6 6067 A Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UCD13382  Plectritis macrocera Charles Martin 1986-5-17 33 Colusa Mendocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service Rd. 18NO1 on Forest Service Rd.17 NO2. Comment
  UCD41210  Plectritis macrocera John Snelling 1986-5-17 3 - Colusa Mill Valley campsite off of Forest Service Road 18N01. Comment
  HSC41006  Poa bulbosa J. P. Smith, Thomas W. Nelson 1976-4-14 8579 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD57879  Poa bulbosa Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 54 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  SEINET11686444  Poa bulbosa var. vivipara S. M. Leary 1978-1 3 Colusa N side of Salt Creek, S side of Hwy 20, 11 mi WSW of Williams 143 Comment
  UCD82444  Poa howellii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5661 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  JEPS120977  Poa secunda Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18643 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS80396  Poa secunda subsp. secunda L. R. Heckard and J. Hickman 1981-6-22 5629 Colusa below (s of) Dark Hollow trail Snow Mt 1981 Comment
  SD262256  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern California Foothills: north side of Maxwell Road, c. 2 miles west of Sites and 5.8 miles east of summit of Maxwell Grade. 128 Comment
  UCR281725  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern California Foothills, north side of Maxwell Road, c. 2 miles west of Sites and 5.8 miles east of summit of Maxwell Grade [Sites-Lodoga Road] 149 Comment
  CDA22742  Polygonum amphibium var. emersum P. Steinbaugh, Goodwin 1932-10-1 Colusa Near Grand Island. 0 Comment
  CHSC84938  Polygonum aviculare Lowell Ahart 2003-10-23 10657 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCR201549  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2008-10-14 14267 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  UC6655  Polygonum aviculare subsp. aviculare J. Burtt Davy May, 1898 Colusa near Willows Comment
  JEPS110387  Polygonum persicaria Lowell Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS118671  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of SacramentoValley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Comment
  CDA28167  Polypogon interruptus L. Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. Comment
  CHSC107163  Polypogon maritimus L. P. Janeway; B. Castro 2011-5-19 10281 A Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. At edge of deepest west end of the marsh in a large patch of Juncus balticus, at the edge of the water line. 49 Comment
  RSA725023  Polypogon maritimus L. Ahart 2006-8-9 13171 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD72472  Polypogon maritimus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3806 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  CHSC107161  Polypogon monspeliensis L. P. Janeway; B. Castro 2011-5-19 10281 B Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. At edge of deepest west end of the marsh in a large patch of Juncus balticus, at the edge of the water line. 49 Comment
  CHSC107982  Polypogon monspeliensis B. Castro; L. Janeway 2011-4-27 1865 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  CHSC77410  Polypogon monspeliensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC94414  Polypogon monspeliensis Lowell Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75438  Polypogon monspeliensis W. L. Jepson 1934-5-4 16604 Colusa Princeton Comment
  SD225721  Polypogon monspeliensis Carol Witham, Jennifer Buck 2001-4-30 149 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  SBBG119883  Polypogon viridis L. Ahart 2006-8-9 13159 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  CHSC116676  Polystichum imbricans subsp. curtum Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20721 Colusa On the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of thee large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  RSA724221  Populus fremontii Richard R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  UCD81255  Populus fremontii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5420 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  HSC59137  Populus fremontii subsp. fremontii Terry Roth 1979-5-7 41 Colusa Where Hwy. 20 enters Salt Canyon along Salt Creek 122 Comment
  UCR225261  Potamogeton diversifolius Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5107 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UCD35976  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E Cortena. Comment
  UCD39221  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E of Cortena. Comment
  UCD82732  Potentilla Craig Thomsen; G. Harrington 2009-5-14 2911 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UC1607563  Potentilla drummondii Barbara Ertter with Elizabeth Neese 1989-7-2 8627 Colusa ca. 11 air mi due w Stonyford (Long Glade s of Milk Ranch just w of Snow Mt. West); just w Snow Mt. West 1956 Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  UCD67100  Prunus emarginata Ellen Dean; Davis Botanical Society 2008-5-31 5027 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  CAS-BOT-BC151201  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga Comment
  UC1299163  Prunus virginiana var. demissa Freed W. Hoffman 1948-6-27 2523 Colusa 8.5 mi sw of Fauts Springs (western Colusa County); North Coast Ranges Comment
  UCD58168  Pseudognaphalium luteoalbum Gordon Harrington 2007-5-15 58 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  CAS-BOT-BC357551  Pseudognaphalium stramineum Roxana Stinchfield 1916-7-8 372 Colusa Sycamore Slough-Stinchfield Ranch Comment
  CHSC113055  Pseudognaphalium stramineum Lowell Ahart 2013-10-1 19070 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS120796  Pseudognaphalium stramineum Lowell Ahart 2013-10-1 19070 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCD133714  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CHSC101626  Psilocarphus brevissimus var. brevissimus David W. Isle 2002-4-18 1657 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) Edge of E-flowing ephemeral drainage in chamise site burned during 8/8/01 Trough Fire and part of Helicopter Hydromulch Study Plot. 524 Comment
  CHSC107977  Psilocarphus oregonus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1856 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. Towards north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in drying vernapool bottom. 49 Comment
  UC1601291  Psilocarphus oregonus T. S. Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC1613326  Psilocarphus tenellus Charles M. Belshaw 1937-4-1 2871 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD57867  Psilocarphus tenellus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 50 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  CHSC79691  Psilocarphus tenellus var. tenellus L. P. Janeway; B. Castro 2000-5-1 6687 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  CHSC80346  Psilocarphus tenellus var. tenellus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  CHSC112221  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC80413  Pterostegia drymarioides Caroline Warren; Jenny Marr 1998-5-4 Colusa Viciniy of Sites and Stone Corral Creek. 91 Comment
  HSC45682  Pterostegia drymarioides Sheila Logan 1978-4-22 63 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC83419  Pterostegia drymarioides R. Robichaux 1975-4-20 31 Colusa E of Walker Ridge Rd., 2.5 mi. NNW of intersection with Hwy. 20 747 Comment
  UCD92227  Puccinellia simplex Beecher Crampton 1958-5-19 4824 Colusa Colusa County, 3 miles south of Maxwell, along U.S. Highway 99W. Comment
  JEPS15216  Purshia tridentata var. tridentata Rimo Bacigalupi with L. T. Dempster, Mrs. P. A. Munz and G. T. Robbins 1956-7-25 5747 Colusa about 0.75 mi w Fouts Camp (s shoulder of Snow Mountains, Colusa-Lake County boundary); Snow Mountains 1905 Comment
  JEPS48934  Quercus X morehus Thomas H. Jukes 1938-11-24 Colusa Stonyford Comment
  UCD84509  Quercus X morehus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6060 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CDA16102  Quercus berberidifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15251 Colusa North Coast Ranges; Goat Mtn. Rd., +/- 1/4 mi W of Pine Flat camp. 426 Comment
  UCD144417  Quercus chrysolepis G. F. Hrusa 1998-10-28 14897 Colusa Inner North Coast Ranges. Above Fouts Springs. Through Springs Road mile 2.7. 750 Comment
  UCD81241  Quercus chrysolepis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5405 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  CDA15555  Quercus chrysolepis var. nana G. F. Hrusa 1998-11-7 14906 Colusa North Coast Ranges; above Fouts Springs. Trough Springs Rd. mi. 2.7. Comment
  UC993118  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993119  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UCD45869  Quercus dumosa Hans G. Jung 1976-4-17 6 Colusa California, Colusa County: 2 miles west of Bear Valley, on north end of Walker Ridge, T15N, R6W, sec. 11. Elevation 1800 feet. 548 Comment
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Apr 18 2009
  CDA16129  Quercus durata G. F. Hrusa 1999-2-13 14914 Colusa North Coast Ranges; Slopes along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  UCD13383  Quercus durata Charles Martin 1986-5-17 31 Colusa 5.7 miles west of Stonyford, along Foot Springs Rd. Comment
  UCD45981  Quercus durata D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. Serpentine chaparral. 850 Comment
  UCD55461  Quercus durata Ellen Dean; Gordon Harrington 2006-10-6 3285 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  UCSC010369  Quercus durata var. durata Dylan M. Neubauer, Tim Forsell 2016-3-30 593 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  HSC90026  Quercus lobata Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-14 49 Colusa Bear Valley Rd. 1.5 mi NW of Lambert Hill 427 Comment
  UCD46857  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa Butte Sink, along Butte Creek, ca. 3 miles northeast of Colusa. Comment
  UCD14524  Quercus palmeri Roger Raiche 1990-12-2 A Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD14527  Quercus palmeri Roger Raiche 1990-12-2 D Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  JEPS75737  Quercus vacciniifolia L. R. Heckard 1974-9-10 3886 Colusa s side upper reaches of Dark Hollow Creek; Snow Mt., Dark Hollow Creek 2042 Comment
  CAS-BOT-BC104659  Quercus wislizeni L. Blackford; S. Branch; D. Malm 1988-4-16 63 Colusa 13.8 miles of Hwy. 20 on Walker Ridge Road 975 Comment
  CDA15554  Quercus wislizeni var. frutescens G. F. Hrusa 1998-11-7 14905 Colusa North Coast Ranges; Above Fouts Springs on Trough Springs Rd. mi. 2.7. Comment
  UC768665  Rafinesquia californica R. F. Hoover 1938-4-24 3211 Colusa Upper Sand Creek Comment
  UCD82383  Rafinesquia californica Craig Thomsen; G. Harrington 2009-5-12 2824 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  POM312419  Ranunculus bongardii G. Thomas Robbins, S. Galen Smith 1950-4-15 1907 Colusa Colusa County: In wet mud and vernal pool, Bear Valley Comment
  CHSC100252  Ranunculus californicus David Isle 1990-6-6 1521 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  UCR206394  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14373 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  SEINET8696617  Ranunculus canus var. canus R. R. Halse 2013-3-26 8740 Colusa Along the Leesville Road, ca. 5.6 miles NW of its junction with CA Hwy 20, W of Williams. 157 Comment
  JEPS87656  Ranunculus hebecarpus Vernon H. Oswald and Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  SEINET4208857  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with Stat Hwy. 20, west of Williams.; 0 157 Comment
  UCSB63942  Ranunculus hebecarpus McBride, Marjorie 1986-4-5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15'. E central border of Sect, 32. T15N, R4W. 143 Comment
  UCD163699  Ranunculus occidentalis Craig Thomsen 1999-5-10 2005 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  RSA268199  Ranunculus occidentalis var. eisenii Lyman Benson 1935-3-27 6327 Colusa 3 miles E of Lake County line Inner N coast, Sacramento River, Ukiah-Tahoe 610 Comment
  UC1191437  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins and S. Galen Smith 1950-4-15 1907 Colusa Bear Valley Comment
  UCD97060  Ranunculus orthorhynchus var. bloomeri Clinton C. Shock 1980-5-3 62 Colusa Bear Valley, ca. 12 miles north west of State Highway 20. 384 Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  UCR206694  Raphanus raphanistrum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14364 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCR206871  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2009-1-31 14318 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  JEPS2828 Image available Rhamnus californica var. crassifolia W. L. Jepson 1920-5-23 8974 Colusa ridge w Bear Valley; ; W of Bear Valley, Colusa Co. Comment
  CHSC39791  Rhamnus ilicifolia Eloise Gallatin 1935-5-12 Colusa Above Stonyford. Comment
  UC71642  Rhamnus ilicifolia Miss Alice King 1905-1 Colusa College City Comment
  CHSC88560  Rhamnus tomentella subsp. crassifolia L. P. Janeway; B. Castro 2001-6-3 7096 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 2.7 km (air) south of Bartlett Springs Road. 799 Comment
  JEPS42073  Rhamnus tomentella subsp. crassifolia J. D. Coffman 1923-6-4 Colusa betw Leesville and Bartlett Sprs; <Briona Hill?> Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  JEPS41974  Rhamnus tomentella subsp. tomentella W. L. Jepson 1934-7-28 16746 Colusa hills near Cortina Valley; Inner North Coast Range Comment
  POM136497  Rhamnus tomentella subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa In Oak grove Phillips Ranch Comment
  CDA21477  Rhododendron occidentale G. F. Hrusa 1989-5-7 6047 Colusa North Coast Ranges; Confluence of Little Stony Creek and Frenzel Creek at the Frenzel Ck. Research Natural Area. Mendocino National Forest. Comment
  JEPS95999  Rhododendron occidentale Vernon H. Oswald and L. Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate. Shrub on the rocky bank of Little Stony Creek. 426 Comment
  UCD117941  Rhododendron occidentale George F. Hrusa 1989-5-5 6066 Colusa Open margin of Little Stony Creek, along Rd. to Cedar Camp. 1.5 m. SW of intersection of Stonyford-Lodoga Rd. 470 Comment
  CDA38890  Rhododendron occidentale var. californicum A. T. Leiser 1985-5-19 s.n. Colusa Between 3-4 miles along Frenzel Creek as it parallels the road M5 from Lodoga to Goat Mtn. Frenzel Creek is on south side of road and down 30-40 ft. 0 Comment
  CAS-BOT-BC170522  Rhus aromatica Roxana S. Ferris 1926-4-23 6590 Colusa Near Stonyford. Comment
  UCD82135  Rhus aromatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5667 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCSB26060  Rhus aromatica Belshaw, Charles 1937-4-25 Colusa Cooks Springs Comment
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 Comment
  JEPS15562  Ribes lobbii G. Thomas Robbins with L. R. Heckard 1956-7-25 3718 Colusa about 50 yards below summit Snow Mt. West (ridge between east and west peaks of Snow Mt.); Snow Mt. 2133 Comment
  JEPS75751  Ribes lobbii L. R. Heckard and R. Bacigalupi 1976-9-6 4432 Colusa just w Fouts Camp; Snow Mt. 1859 Comment
  UCD80839  Ribes malvaceum Jack Alderson 2009-2-21 20 Colusa BLM Payne Ranch (Bear Creek Ranch), lands to the SW of intersection of Hwys 16 and 20. Brophy Canyon. 304 Comment
  UCD97118  Ribes malvaceum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6901 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  CHSC115751  Ribes malvaceum David Isle 2015-6-20 2156 Colusa North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill, 100-200' S of 18N01 in 2012 Mill Fire area chaparral. 10S -0533568E, 4357508N. 439 Comment
  UCD108151  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6900 Colusa Along Bear Valley Rd on west and east sides of road. 355 Comment
  UCR243003  Ribes quercetorum Gordon Harrington 2012-2-14 s.n. Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property 306 Comment
  RSA0034162  Ribes roezlii M. Bourell 1997-3-29 5770 Colusa Mendocino National Forest. Dixie Glade Campground. 918 Comment
  CAS-BOT-BC362903  Rigiopappus leptocladus Roxana S. Ferris 1926-4-23 6589 Colusa Near Stonyford Comment
  CHSC94628  Rigiopappus leptocladus Lowell Ahart 2006-6-11 12666 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  HSC48145  Rigiopappus leptocladus Thomas W. Nelson, Jane P. Nelson 1978-4-30 3966 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  UCD163224  Rigiopappus leptocladus Craig D. Thomsen 2000-3-31 2116 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD82862  Rigiopappus leptocladus Gordon Harrington 2008-4-13 73 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  UCD81891  Rorippa curvisiliqua Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5775 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  CHSC86881  Rorippa nasturtium-aquaticum B. Castro; S. Innecken 2003-4-2 1412 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. In bottom of small stream. 167 Comment
  CHSC85959  Rosa californica Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UC72992  Rosa californica H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD63733  Rosa californica Craig D. Thomsen 2008-5-23 2743 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 421 Comment
  CAS-BOT-BC158728  Rubus ursinus Roxana Stinchfield 1916-7-8 381 Colusa Sycamore Slough, Stinchfield Ranch Comment
  POM163497  Rubus vitifolius Roxana S. Ferris 1926-4-21 6310 Colusa Sycamore Slough/ Near Sycamore. Comment
  CAS-BOT-BC110478  Rumex Roxana Stinchfield 1916-7-9 418 Colusa Overflow land on Sacramento River - Phillips Ranch. Comment
  JEPS75734  Rumex acetosella L. R. Heckard 1974-9-9 3876 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  JEPS81280  Rumex crispus L. R. Heckard and J. C. Hickman 1982-7-5 5891 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  CAS-BOT-BC433469  Rumex dentatus Roxana S. Ferris 1926-4-21 6285 Colusa 3 miles west of Colusa Comment
  UCD81731  Rumex salicifolius Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5733 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  JEPS113057  Saccharum ravennae Gordon Leppig 2001-9-13 1610 Colusa Rt. 16. Mile marker 4.7-4.58. Bear Creek Gravel bar. Comment
  UC1178889  Sagittaria latifolia Herbert L. Mason 1945-9-19 12714 Colusa 1 mi n Colusa (on e side, below causeway, marshy bank of the Sacramento River); marshy bank of the Sacramento River Comment
  UC1178890  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa 1 mi n Colusa (on e side, Marshy bank of the Sacramento River); bank of the Sacramento River Comment
  CHSC61041  Salicornia subterminalis Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5704 Colusa Colusa National Wildlife Refuge. Tract 7 just SW of the headquarters complex on O'Hair Rd., ca. 2 mi SW of Colusa. 12 Comment
  CHSC78975  Salicornia subterminalis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9979 Colusa Colusa National Wildlife Refuge. On the west side of Powell Slough 0.25 mi south-southwest of Refuge Headquarters. 15 Comment
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD163647  Salix breweri Craig Thomsen 1998-6-19 1943 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  UCD63618  Salix breweri Craig D. Thomsen 1999-5-12 2032 Colusa BLM Payne Ranch. Approximately 0.5 mile southwest of intersection of Hwy 16 and Hwy 20. Along ephemeral drainage west of large hillslope/peak. Comment
  CHSC77371  Salix exigua Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Sites and Sites-Ladoga Road. 109 Comment
  UCD56932  Salix exigua Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3534 a Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  HSC71299  Salix gooddingii Thomas W. Nelson, Jane Nelson 1979-4-12 4627 Colusa Along Stony Creek below Digger Pine Campground Comment
  CAS-BOT-BC104037  Salix hindsiana Roxana S. Ferris 1917-4-17 619 Colusa Sycamore Slough Comment
  CDA12799  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa Inner North Coast Ranges; On Sites-Lodoga Rd. ~2.5 m. NW of Sites at base of Little Antelope Grade. Comment
  UCD111126  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa 2.5 miles NW of Sites at base of Little Antelope Grade. 200 Comment
  UCD163864  Salix laevigata Craig D. Thomsen 2001-5-31 2549 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD164153  Salix laevigata Craig Thomsen 1999-4-27 1999 Colusa Bear Creek Canyon. Along Bear Creek, just north of Sulphur Creek confluence, next to Wilbur Bridge. Comment
  UCD84432  Salix laevigata Jack Alderson 2009-4-8 34 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CDA12798  Salix lasiolepis G. F. Hrusa 1996-2-26 12633 Colusa Serpentine Flora of California; Margin of Little Stony Creek approx. 2 m. beyond intersection of Goat Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  CDA16094  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges; Goat Mountain on S side. 1722 Comment
  JEPS122457  Salix lasiolepis David Isle with David Toren 2003-6-24 2128 Colusa Mendocino National Forest. NE border of Veratrum spring & meadow, 1/4 mi E of Goat Mtn Rd 16N03 junction w/Horse Glade Rd; (with flowing water) Comment
  JEPS80057  Salix lasiolepis L. R. Heckard with J. Hickman 1979-6-15 5057 Colusa along eastern trail from Frog Camp (n of West Peak) to Saddle (Snow Mt.); Snow Mt. 2072 Comment
  UCD81257  Salix lasiolepis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5422 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD84433  Salix lasiolepis Jack Alderson 2009-4-8 33 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CDA37042  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. 0 Comment
  JEPS118679  Salsola soda B. Castro with Dave Bogener 2011-9-1 1913 Colusa Sacramento Valley. 10 air mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Moulton Weir 7.5' quad. Comment
  CAS-BOT-BC176899  Salsola tragus Roxana Stinchfield 1916-7-8 369 Colusa Sycamore Slough Road Comment
  CHSC27518  Salvia columbariae Michael F. Henetz 1978-4-15 16 Colusa Ca. 65 m n of Salt Creek, ca 15 m n of Hwy. 20, ca. 17.7 km wsw of Williams. 143 Comment
  HSC44458  Salvia columbariae R. York 1978-4-22 128 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC87083  Salvia columbariae L. Blackford, S. Branch, D. Malm 1988-4-16 48 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  UCD70242  Salvia mellifera D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Open serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  HSC39240  Sanicula bipinnatifida J. P. Smith, Thomas W. Nelson 1976-4-14 8577 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  CDA34108  Sanicula bipinnatifida P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD66530  Sanicula crassicaulis Craig D. Thomsen 2000-4-12 2153 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC42673  Sanicula tuberosa Vernon Oswald 1986-3-25 1052 Colusa Fouts Spring Rd. (M10) 0.5 mi e of John Smith Rd. (M5). 548 Comment
  JEPS951  Sanicula tuberosa W. L. Jepson 1932-5-8 16274 Colusa Lodoga, w Colusa County Lodoga Comment
  UC1006708  Sanicula tuberosa C. Ritchie Bell 1953-3-22 1402 Colusa w of Indian Valley (beside Bartlett Springs Road) Comment
  UCR206400  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14377 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCD163867  Schedonorus arundinaceus Craig D. Thomsen 2001-5-31 2555 Colusa Bear Creek Canyon, south of Bear Valley. About 4 miles north of Hwy 20. Comment
  UC841012  Schoenoplectus americanus A. A. Heller 1916-6-9 12390 Colusa about 8 mi w Williams (along a stream); Coast Range, w of Williams Comment
  UCD72473  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3807 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  CDA417  Scirpus glaucus Kingwill 1929-8-23 Colusa 0 Comment
  UC1100924  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12964 Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UCD50163  Scirpus pungens D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  JEPS21848  Scribneria bolanderi John R. Swanson 1958-4-26 308 Colusa 1.4 mi w of Bear Valley (on road toward Bartlett Springs) 609 Comment
  UC769882  Scribneria bolanderi R. F. Hoover 3207 Colusa Upper Sand Creek Comment
  UCD83760  Scribneria bolanderi Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5956 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  RSA589943  Scrophularia californica Michael A. Vincent, Robert M. Rhode 1996-3-30 7278 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct. Wilbur Springs Rd. Comment
  JEPS80266  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-16 5450 Colusa e of Snow Mountain, West Peak (first meadow along trail from Frog Pond, Snow Mountain); Snow Mountain 1981 Comment
  JEPS80267  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-16 5450 Colusa e of Snow Mountain, West Peak (first meadow along trail from Frog Pond, Snow Mountain); Snow Mountain 1981 Comment
  JEPS80801  Scutellaria californica L. R. Heckard and J. C. Hickman 1981-7-30 5772 Colusa heading up East Ridge of Snow Mountain, West Peak 1950 Comment
  JEPS82553  Scutellaria californica L. R. Heckard 1983-7-27 6104 Colusa about 1/2 mi w of Summit Springs (south side of Snow Mountain); Snow Mountain 1470 Comment
  JEPS95817  Scutellaria californica Vernon H. Oswald and L. Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area: T17N R8W Sect. 12, ca. 3200 ft, mixed coniferous forest, serpentine substrate 975 Comment
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  UCD57835  Scutellaria siphocampyloides Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 39 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (going roughly west) from Road Kill Cafe, about 1/2 mile upstream from the breached dam. 398 Comment
  UCD81728  Scutellaria siphocampyloides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5730 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  CHSC101618  Scutellaria tuberosa David W. Isle; Teal Richards 2002-4-18 1651 Colusa Mendocino National Forest. N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mountain). SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg. Study Plot. MDB and M. 524 Comment
  SFV10451  Scutellaria tuberosa M. L. Vincent 1968-6-8 779 Colusa Goat Mountain Road, 1 mile from Stanford turnoff. Comment
  UCD58126  Senecio vulgaris Ellen Dean; PLB 102 Class 2007-4-29 3722 Colusa Payne Ranch. Lands to the SW of the junction of Hwy. 16 and Hwy. 20. Thompson Canyon, near junction with Craig Canyon. Thompson Creek. 362 Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  SEINET3876301 Image available Sequoia sempervirens James H. Smith 1976-1 s.n. Colusa Williams.; 0 Comment
  CAS-BOT-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  JEPS120911  Sidalcea diploscypha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18647 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD116629  Sidalcea diploscypha Clinton C. Shock 1980-5-3 63 Colusa Bear Valley west side, about 12 miles northwest of State Highway 20 near State Highway 16. 390 Comment
  UCD57851  Sidalcea diploscypha Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 41 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  UCD57860  Sidalcea diploscypha Gordon Harrington 2007-4-17 28 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  UCD67006  Sidalcea diploscypha Craig D. Thomsen 2008-5-23 2742 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  UCD82533  Sidalcea diploscypha Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5685 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  SBBG117358  Sidalcea diploscypha R. E. Rolley 1977-5-8 Colusa 0.3 mi NNW on Bear Valley Rd from Hwy 20 Comment
  JEPS50051  Sidalcea hartwegii W. L. Jepson 1932-5-8 16278 Colusa Lodoga Lodoga (w Colusa Co.) Comment
  JEPS117021  Sidalcea keckii David Gowen 2008-5-24 921 Colusa Stoneyford Ladoga Rd., ca. 1.6 miles south of Stoneyford. Growing on road shoulder on east side of road. Comment
  JEPS50071  Sidalcea keckii W. L. Jepson 1932-5-7 16260 Colusa valley 2 mi above Venado (w Colusa Co.); Venado (valley 2 mi above) Comment
  JEPS123189  Sidalcea keckii David Gowen 2009-5-6 1014 Colusa Eastside of Hwy 20, about 16 miles west of Williams, near milepost 6.42 (from county line?). Comment
  RSA477841  Silene californica D. A. Young 1969-5-4 P- 377 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  SD72209  Silene californica Eugene Memmler 1969-5-8 102 Colusa Valley side of coastal hills between Williams and Clear Lake, Highway 20. 149 Comment
  UC1299502  Silene campanulata Freed W. Hoffman 1947-6-19 1674 Colusa Cooks Springs North Coast Ranges, Cooks Springs Comment
  UCD111674  Silene campanulata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  UCD56688  Silene campanulata subsp. glandulosa Gordon Harrington 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 586 Comment
  HSC45722  Silene gallica M. Alcasas 1978-4-22 38 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC48194  Silene gallica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3962 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC388980  Silene laciniata subsp. californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi. NW. of Rumsey 304 Comment
  JEPS124241  Silene laciniata subsp. californica Lowell Ahart 2015-4-1 19992 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  SEINET11262894  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  UCD56658  Silene laciniata subsp. californica Sam Bledsoe 2007-3-25 4 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  CAS-BOT-BC74903  Sinapis arvensis Roxana S. Ferris 1917-4-12 513 Colusa 4 mile east of Williams. Comment
  RSA783303  Sinapis arvensis R. R. Halse 2010-3-20 7826 Colusa Along State Hwy 20 ca. 5.4 miles W of Colusa (junction of State Hwys 20 & 45). 17 Comment
  JEPS124249  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  CHSC114941  Sisyrinchium bellum Lowell Ahart 2015-4-10 20012 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear ValleyRoad and Brim Road, about 17 miles (air) west of Williams. Meadow in Chaparral. 500 Comment
  HSC31314  Sisyrinchium bellum Carter Schleicher 1974-5-4 27 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS120994  Sisyrinchium bellum Lowell Ahart 2013-4-26 18644 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  UCD138841  Sisyrinchium bellum Clinton C. Schock 1980-5-3 58 Colusa Bear Valley, around 12 miles northwest of Highway 20. 384 Comment
  CHSC118887  Sisyrinchium bellum David Isle; Frank Pendell 2017-5-17 2173 Colusa Foothils E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  SBBG128715  Sisyrinchium bellum L. Ahart, J. Dittes, J. Guardino 2013-4-26 18644 Colusa N side of State Hwy 20, just E of Lake County Line, 12.2 mi ENE of Clear Lake (town), 17.1 mi W of Williams 566 Comment
  SEINET3887835  Smilacina racemosa var. amplexicaulis Barbara Bogert 1970-5-23 16 Colusa Bear Valley Road 2.5 miles north of State Highway 20.; 0 183 Comment
  POM62090  Solanum americanum Roxana Stinchfield 1916-7-7 385 Colusa Sycamore Slough bed. Stinchfield Ranch. Comment
  CHSC28810  Solanum parishii Laraine Roothoff 1979-3-31 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC57525  Solanum parishii Shelly A. Kirn 1991-4-6 12 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC90168  Solanum parishii Gary R. Koses 1979-3-31 18 Colusa Salt Canyon, n side of Salt Creek, hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC62930  Solanum parishii Kenneth Clark 1979-4-14 103 Colusa Bear Valley Rd. 3.9 mi. N of State Rte. 20 412 Comment
  CDA32822  Solanum parishii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD126968  Solanum parishii Marti Franco 1978-4-8 200 Colusa esat side of State Highway 16, around 3 miles southeast of State Highway 20. Comment
  CHSC94521  Solanum physalifolium var. nitidibaccatum Lowell Ahart 2006-8-22 13223 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CHSC45991  Solanum rostratum Lowell Ahart 1980-6-11 2370 Colusa Along the edge of the River Road, where the road dips and floods during high water, about 9 1/2 miles north of Colusa. 30 Comment
  CHSC91068  Solidago velutina subsp. californica D. Isle 2002-8-12 180 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 585 Comment
  UCD72466  Sonchus asper Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3800 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  CAS-BOT-BC235305  Sorghum halepense Roxana Stinchfield 1918-7-9 408 Colusa Phillips ranch near Sycamore Comment
  CAS-BOT-BC235306  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  UCD99217  Spergularia macrotheca var. leucantha Malcolm A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99 W, near Delevan. Comment
  CHSC107953  Spergularia marina B. Castro; T. Boullion 2011-4-20 1836 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  CHSC79491  Spergularia marina L. P. Janeway; B. Castro 2000-3-23 6634 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  UC625432  Spergularia marina G. B. and R. P. Rossbach 1938-5-31 636 Colusa 2 mi s Maxwell (near irrigation ditch) Comment
  CAS-BOT-BC390760  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  CAS-BOT-BC390769  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 637 Colusa 2 mi. so. of Maxwell Comment
  CDA41017  Stachys ajugoides var. ajugoides Agr. Comm Staff 1960-5-11 s.n. Colusa [no additional data] 0 Comment
  CHSC84233  Stachys albens Lowell Ahart 2003-7-14 10381 A Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  JEPS95820  Stachys albens Vernon H. Oswald and L. Ahart 1999-6-22 9784 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  SEINET13710181  Stachys albens Lowell William Ahart, Lowell William Ahart 2003-1 10381 -A Colusa 2 Mi. SW Jct. Hwy 20 and Bear Valley Road, 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23' 59.5"W) 1708'W) 521 Comment
  JEPS108769  Stachys pycnantha Lowell Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  CAS-BOT-BC374775  Stebbinsoseris heterocarpa Roxana S. Ferris 1917-4-14 570 Colusa 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC86516  Stellaria nitens B. Castro 2003-3-17 1382 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  UCD65628  Stellaria nitens Craig D. Thomsen 2000-4-12 2128 -b Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS80756  Stephanomeria lactucina L. R. Heckard and J. C. Hickman 1981-7-29 5723 Colusa spur about 1 km se Summit Springs (s side of Snow Mt.); Snow Mt. 1554 Comment
  UCD81218  Stephanomeria virgata Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5555 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  CHSC79473  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner North Coast Ranges. Slope along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  CHSC79695  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner Coast Ranges. Along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  JEPS110412  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2006-8-9 13099 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC107966  Stipa pulchra B. Castro; L. Janeway 2011-4-27 1869 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.4 mi southeast of Funks Reservoir on top of N-trending ridge southeast of outlet toTehama-Colusa Canal. In grassy hills about 80 ft N of the canal. 74 Comment
  CHSC91026  Streptanthus D. Isle 2003-6-10 360 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0526306E 4345340N. 1365 Comment
  UCD23461  Streptanthus batrachopus A. M. Shapiro 1988-6-6 s.n. Colusa Goat Mountain Road. 762 Comment
  JEPS96909  Streptanthus breweri Dean W. Taylor 1998-6-16 16663 Colusa Bear Valley road 1.5 mi NW junction Highway 120; near mouth Warnick Canyon 350 Comment
  UC1492724  Streptanthus breweri Freed W. Hoffman 1957-6-26 4264 Colusa 6 mi w Stonyford Comment
  UCD164311  Streptanthus breweri Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 553253, 4318610. [UTM coordinates place this location along Bear Valley Rd., north of HWY 20.] 381 Comment
  UCD66953  Streptanthus breweri Ellen Dean; Davis Botanical Society 2008-5-31 4997 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD67010  Streptanthus breweri Craig D. Thomsen 2008-5-23 2741 -b Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 473 Comment
  UCD70220  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine annual grasslands in serpentine chaparral edges. 370 Comment
  CAS-BOT-BC61234  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  CAS-BOT-BC61237  Streptanthus breweri Roger Raiche 1985-5-25 50460 Colusa Walker Ridge, Brim Road, near intersection West Walker Road. 637 Comment
  CAS-BOT-BC61239  Streptanthus breweri Oakley Shields 1970-4-17 73 Colusa Near Wilbur Springs 2 miles northwest of Bear Valley Road and Highway 20. Comment
  UC1292771  Streptanthus breweri Freed W. Hoffman 2784 Colusa N of road from Leesville to Bartlett Springs, along the summit between Colusa and Lake counties Comment
  UC1051550  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-21 4307 Colusa borders of creek ca 1 mi within boundary of National Forest Inner North Coast Ranges, Mendocino National Forest, Little 670 Comment
  UC956510  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-18 1019 Colusa Wilbur Springs Road Comment
  UC956515  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 Comment
  UC956517  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 2295 Colusa Fouts Springs-Letts Valley road 1.5 mi from Fouts Springs 579 Comment
  UCD57303  Streptanthus breweri var. breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3674 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  UCD82160  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5693 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  SEINET11993369  Streptanthus breweri var. hesperidis Unknown 1985-1 50460 Colusa Walker Ridge, Brim Rd nr intersection W Walker Ridge Rd Comment
  CHSC25074  Streptanthus glandulosus D. Joley 1968-3-30 Colusa On Hwy 20 10 mi w of Williams.