Search Results — 2000 specimen records retrieved (1623 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC80223  Abutilon theophrasti B. Castro; G. Kuenster 2000-7-19 1200 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal, at edge of a levee road along an un-named drainage through agricultural land. 42 Comment
  JEPS80813  Acer macrophyllum L. R. Heckard and J. C. Hickman 1981-7-31 5786 Colusa e side Snow Mt. (se end rock promontory called Fouts Springs Overlook); e side Snow Mt., se end Fouts Springs Overlook 1783 Comment
  POM163502  Acer negundo subsp. californicum Roxana S. Ferris 1926-4-22 6301 Colusa Near Sycamore. 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
  JEPS75875  Achnatherum lemmonii L. R. Heckard 1974-9-11 3946 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  CHSC105753  Achyrachaena mollis Christine C. Lorain 1989-4-15 1853 Colusa Junction of Hwy 20 with Hwy 16, 41 miles SW of Williams. 152 Comment
  HSC87056  Achyrachaena mollis P. A. Daly, Rudy Galindo 1988-4-17 56 Colusa 5.2 miles south of Bear Valley Road 390 Comment
  POM52917  Achyrachaena mollis Roxana S. Ferris 1917-4-12 s.n. Colusa 4 miles east of Williams. Comment
  UC88433  Achyrachaena mollis Brandegee 1900-1 Colusa Colusa Junction Comment
  UCD163687  Achyrachaena mollis Craig Thomsen 1999-4-15 1989 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  SEINET3245652  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2008-1 14242 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County line (Meridian 7.5') 9 Comment
  UCD55456  Acmispon americanus var. americanus Ellen Dean; Gordon Harrington 2006-10-6 3280 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
  CHSC112211  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 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
  CHSC94419  Acmispon brachycarpus Lowell Ahart 2006-8-22 13217 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD72387  Acmispon glaber Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5113 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
  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
  SEINET8043935 Image available Acmispon rubriflorus A. Howald 2003-1 2354 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
  UCR261720  Acmispon rubriflorus Ann Howald 2003-5-30 2354 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
  UCR261743  Acmispon rubriflorus Ann Howald 2003-6-9 2365 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, at Sleepy Hollow camping area 378 Comment
  CHSC112313  Acmispon wrangelianus Lowell Ahart 2013-5-1 18697 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
  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
  HSC44246  Acmispon wrangelianus Barbara Kelly 1977-4-24 351 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  HSC72174  Acmispon wrangelianus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9551 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD163318  Acmispon wrangelianus Craig D. Thomsen 1997-4-20 1916 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD66470  Acmispon wrangelianus Craig D. Thomsen 2001-4-12 2461 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
  JEPS75833  Aconitum columbianum L. R. Heckard 1974-9-11 3943 Colusa s.e. Foutch Camp (just e. of large rocky outcroppings, Snow Mt.); Snow Mt. 1859 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
  CAS-BOT-BC133151  Adenostoma fasciculatum Roxana S. Ferris 1917-4-14 594 Colusa 5 mi west of Arbuckle along Sand Creek, Arbuckle - Rumsey Road Comment
  HSC72177  Adenostoma fasciculatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9555 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UC71996  Adenostoma fasciculatum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  SEINET10866059  Adenostoma fasciculatum Katherine L. Morris 1973-6-6 Morris 390 Colusa Chaparral woodland and sparse oak, on hwy 20, 0.3 miles e of lake co line 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
  CDA18841  Aeschynomene rudis R. Breckenridge 1999-7-1 PDR 909445 Colusa Rice field along Boggs Rd., in the vicinity of Princeton. 0 Comment
  CDA4023  Aeschynomene rudis G. Costa, S. Scardaci 1990-8-28 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4027  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
  CDA4028  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
  CDA34336  Aeschynomene rudis R. Breckenridge, K. Hull 1990-9-13 Colusa south of Princeton. 0 Comment
  SFV15097  Aeschynomene rudis B. J. McCaskill, G. D. Barbe (4397) 1990-9-5 s. n. Colusa West side of Boggs Road between Dodge and Fonseca Roads. MDB&M. Comment
  SFV15098  Aeschynomene rudis B. J. McCaskill, G. D. Barbe (4397) 1990-9-5 s. n. Colusa West side of Boggs Road between Dodge and Fonseca Roads. MDB&M. Comment
  UCD104588  Aeschynomene rudis George Costa; Steven Scardaci 1990-8-28 s.n. Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  UCD104589  Aeschynomene rudis June McCaskill; with Jim Hill 1990-8-27 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  UCD104592  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  HSC59124  Aesculus californica Terry Roth 1979-5-7 40 Colusa Where Hwy. 20 enters Salt Canyon along Salt Creek 122 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
  JEPS83147  Ageratina occidentalis L. R. Heckard 1974-9-10 3887 Colusa stream of upper reaches Dark Hollow Creek; Snow Mt., East Peak 2011 Comment
  UCD66705  Agoseris grandiflora Craig D. Thomsen 2001-4-12 2490 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
  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
  CHSC27803  Agoseris heterophylla K. D. Whitney 1978-4-8 23 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
  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
  UCD66469  Agoseris heterophylla Craig D. Thomsen 2001-4-12 2459 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
  UCD51802  Agrostis avenacea Beecher Crampton 1963-8-5 6871 Colusa 3/4 mile E of Cortena, Lurline Road. Comment
  CHSC71458  Agrostis exarata Vernon H. Oswald; Lowell Ahart 1998-7-15 9273 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS73446  Agrostis variabilis L. R. Heckard 1972-7-8 3043 Colusa on ridge running se West Peak, Snow Mt. (on n side) 2011 Comment
  CHSC94474  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD66472  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 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
  UCD137914  Alisma lanceolatum Herbert L. Mason 1946-9-5 13119 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  UCD66951  Alisma triviale Gordon Harrington 2008-6-16 s.n. Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Along Brophy Canyon Creek upstream of trail crossing. 457 Comment
  POM313034  Alisma triviale H. L. Mason, Verne Grant 1946-9-5 13119 Colusa Road to Lake Co, 1.6 miles W of Williams. 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
  CAS-BOT-BC131915  Allium Roger Raiche 1985-3-19 RR 50160 Colusa Colusa-Lake County line, Walker Ridge, 3.4 miles south of north end of Barrel Springs Campground on Walker Ridge Road 1036 Comment
  CHSC112205  Allium amplectens Lowell Ahart 2013-5-1 18682 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
  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
  UCD82159  Allium amplectens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5689 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
  UCR261630  Allium amplectens Ann Howald 2003-3-26 2291 A Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  UCR44923  Allium amplectens 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-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford 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
  UCD141848  Allium cratericola L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa Lake - Colusa County Line: 3.0 miles toward Bartlett Springs from road junction. Leesville and Wilbur Springs. 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
  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
  CHSC115634  Allium falcifolium David Isle; Terril Wolt 2015-4-8 2147 Colusa North Coast Range: N of Fouts Springs; just N of the S Fork Stony Creek. W of FS Gate to Bathouse (Welton Glade) Trailhead ~200-300 ft.. In drainage ditch on S edge rd. (Fouts Springs California: 10S-0529687E, 4356519N). Comment
  POM174570  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford. Comment
  UCD141802  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville, near head of Bear Valley, off road. 304 Comment
  UCD141855  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  UCD141787  Allium fimbriatum M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa Bear Valley Road (sign to Wilbur Springs) past fenced area after leaving junction of California 16 and 20. Comment
  UCD141788  Allium fimbriatum M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa Bear Valley Road (sign to Wilbur Springs) past fenced area after leaving junction of California 16 and 20. 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
  UC2014135  Allium fimbriatum subsp. purdyi Michele Lanctot with Plant Biology 102 2007-4-29 2 Colusa Colusa County: 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. Comment
  CAS-BOT-BC135883  Allium fimbriatum subsp. purdyi M. S. Baker 1937-5-17 8657 Colusa Hiway 20, nr. Lake Co. line. Comment
  UCD138533  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
  UCD141786  Allium fimbriatum var. purdyi L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa Bear Valley Road (beyond sign to Wilbur Springs) past fenced area on right after leaving junction of California 16 and 20. Comment
  UCD141789  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD57301  Allium fimbriatum var. purdyi Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3672 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
  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
  UCR198144  Allium fimbriatum var. purdyi Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3672 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
  CHSC32954  Allium serra Teri Barowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 47 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  HSC67097  Allium serra Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 47 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  HSC72137  Allium serra J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9569 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  POM174564  Allium serra Roxana S. Ferris 1926-4-23 6429 Colusa Near summit on grade. Williams- Stonyford Road Comment
  CAS-BOT-BC475543  Allium serra Roxana S. Ferris 1917-4-14 557 Colusa Foothills 7 miles west of Arbuckle Comment
  HSC103590  Allium serra Thomas W. Nelson, Jane Nelson 1981-4-16 6413 Colusa Along Bartlet Springs-Bear Valley Rd., ~ 100 yds. from Bear Valley 610 Comment
  SEINET14407744  Allophyllum gilioides subsp. violaceum R. R. Halse 2010-3-25 7849 Colusa Along State Hwy 20 in Salt Canyon, ca 10.7 miles SW of its junction with I-5 at Williams. 154 Comment
  JEPS80795  Alnus incana subsp. tenuifolia L. R. Heckard and J. C. Hickman 1981-7-30 5765 Colusa Trout Creek Snow Mt. (se side of mt.) Comment
  UCD110015  Alnus rhombifolia G. F. Hrusa 1996-1-23 12630 Colusa Inner North Coast Ranges. Riparian area of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. 475 Comment
  UCD39269  Amaranthus palmeri B. Crampton 1958-6-26 4973 Colusa Grieve road just n.e. of Hershy R.R. siding, 5.5 miles south of College City, Colusa County. 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
  JEPS104399  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  CHSC94478  Ammannia robusta Lowell Ahart 2006-8-9 13142 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  POM134394  Ammannia robusta Roxana Stinchfield 1916-7-17 288 Colusa At Tule Levee, College City Comment
  RSA724959  Ammannia robusta L. Ahart 2006-8-9 13142 Colusa north side and just east of the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS81300  Amsinckia intermedia L. R. Heckard and J. C. Hickman 1982-7-5 5914 Colusa slope below Summit Springs (s side Snow Mountain); Snow Mountain 1524 Comment
  SEINET12519076  Amsinckia intermedia Christine Laning 1973-1 108 -14 Colusa 10.0 miles northwest of Rumsey on Route 16, near Yolo/Colusa county line. Comment
  UCD119708  Amsinckia intermedia David West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highway 16 and 20. 243 Comment
  UC1199518  Amsinckia lunaris Annetta Carter 1938-5-8 1385 Colusa 3 mi n Leesville (on Lodoga Road) Comment
  UCD77237  Amsinckia lunaris Robert E. Preston 2005-4-10 2330 Colusa Ca. 0.9 mi ESE of Wilbur Springs, along Bear Valley Road. 373 Comment
  UCR206368  Amsinckia lunaris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  RSA0089732  Amsinckia lunaris B. Castro 2003-3-18 1384 -a Colusa Vicinity of Sites (Offstream Storage Investigation: Sites S. Bridge road route), hills N of the Sites-Lodoga Road, and Stone Corral Creek. 198 Comment
  UC1084529  Amsinckia lycopsoides Peter Kamb 1952-5-25 2291 Colusa 1 mi e Lake County line (on Hwy 20) Comment
  UC1093625  Amsinckia lycopsoides Francia Chisaki, Gene B. Newcomb 1958-4-1 1096 Colusa on road to Lodoga and Wilbur Springs (0.5 mi nw of junction with Hwy 20) Comment
  UC1178228  Amsinckia lycopsoides Peter M. Ray 1950-4-15 1712 Colusa 1.5 mi s Lodoga (road to Leesville) 381 Comment
  UCD56909  Amsinckia menziesii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3512 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  RSA256677  Ancistrocarphus filagineus J. L. Hobson 1974-5-4 63 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 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
  CHSC42571  Angelica tomentosa Vernon Oswald 1984-7-20 1612 Colusa Near the Lily Pond n of Letts Lake in the Mendocino Nat. Forest. 1280 Comment
  CAS-BOT-BC69129  Antennaria geyeri G. Thomas Robbins; L. R. Heckard 1956-7-25 3722 Colusa At summit of Snow Mt. West 2145 Comment
  CHSC101033  Anthriscus caucalis John Dittes 2008-3-14 1514 Colusa Great Central Valley; Sacramento Valley; between Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air mile south of Gridley Road, ca. 1.1 air mile west of Drumheller Slough; 17 Comment
  HSC38895  Anthriscus caucalis J. P. Smith 1974-5-12 7366 Colusa 3.3mi S of Princeton Comment
  UCD164147  Antirrhinum cornutum Craig Thomsen 1997-6-21 1929 Colusa Bear Valley. About 8 miles north of Hwy 20, central Bear Valley. Comment
  RSA0037103  Antirrhinum subcordatum David W. Isle, Rhonda Isle 2013-5-19 2039 Colusa 0.1 mi E of Maxwell Grade Summit; N of Sites Lodoga Road. July 2012 Sites Fire Area GPS (NAD27 CONUS) 10S. Comment
  RSA724838  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  SBBG119809  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa W side of USFS Rd 18N03, ca. 100 yds N of Mill Crk, near Fouts, Mill Crk Cmpgrds, ca. 5.75 air mi WSW of Stonyford 500 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
  CHSC111647  Apocynum cannabinum David Isle 1988-5-11 2102 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Above (S of) 18N01 (M10), ~200 yds NW of jct w/ OHV Trail 17N12; (3/4 mi SW of Fouts Springs Loop Rd, E Side). 670 Comment
  CHSC86964  Apocynum cannabinum B. Castro; Michelle Cedarborg 2003-5-1 1426 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. By creek not far downstream of pond at creek headwaters 204 Comment
  SEINET8731045 Image available Apocynum cannabinum Helen K. Sharsmith 1953-1 4263 Colusa Raw serpentine, near confluence of North and Middle forks of Stoney Creek, Red Bride Camp, Mendocino National Forest 549 Comment
  CHSC48685  Aquilegia eximia Vernon Oswald 1984-7-20 1625 Colusa M10, 5.4 mi w of Rd. 306 at Stonyford. 609 Comment
  JEPS73450  Aquilegia formosa L. R. Heckard 1972-7-8 3074 Colusa ridge running se Snow Mt., West Peak 1981 Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  UCD50538  Arctostaphylos canescens G. L. Webster 1989-5-6 7700 Colusa Near border with Lake County, Pinus attenuata woods on crest of Walker Ridge, near Cold Springs Mountain. Comment
  SEINET11989693  Arctostaphylos canescens R. A. DeMartile 1982-1 s.n. Colusa between Ladoga & Goat Mt. lookout 792 Comment
  SD53207  Arctostaphylos manzanita Darley F. Howe 1962-5-19 3285 Colusa 11 miles west of Williams on Highway 20. 149 Comment
  SDSU1508  Arctostaphylos manzanita D. F. Howe 1962-5-19 3285 Colusa 11 miles west of Willams on #20. 152 Comment
  CAS-BOT-BC24376  Arctostaphylos manzanita subsp. manzanita Walter Knight; Irja Knight 1964-4-11 814 Colusa Between Lewisville and Ladoga. Comment
  CAS-BOT-BC24378  Arctostaphylos manzanita subsp. manzanita Richard A. DeMartile 1982-10-10 s.n. Colusa Road between Ladoga and Goat Mountain Lookout. 914 Comment
  CAS-BOT-BC24379  Arctostaphylos manzanita subsp. manzanita A. A. Heller 1940-2-14 15499 Colusa Three mi. e. of the North Fork of Cache Creek Bridge on State Hwy #20. Comment
  CAS-BOT-BC24380  Arctostaphylos manzanita subsp. manzanita Roxana S. Ferris 1926-4-23 6592 Colusa Near Stonyford. Comment
  SEINET7258424  Arctostaphylos manzanita subsp. roofii R. R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 mi WNW of its junction with State Hwy. 20. 378 Comment
  SFV8791  Arctostaphylos viscida S. C. Schank 1960-4-10 51 Colusa Above Cache Creek, 2 miles northwest of junction of Highway 16 and Highway 20 on road to Bear Valley. Comment
  UCD52647  Arctostaphylos viscida Roman Gankin 1958-4-26 292 Colusa In Leesville-Bartlett Springs road, ca. 2 miles west of junction of this road and Leesville-Wilbur Springs road, near Colusa-Lake County line, California. 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
  CDA38841  Arctostaphylos viscida G. D. Barbe 1964-3-29 761 Colusa Three miles west of Bear Valley Road on Bartlett Springs Road at Lake/Colusa county line; west of Leesville. Comment
  CHSC62844  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald 1994-3-23 6011 Colusa 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. 518 Comment
  UCSC010367  Arctostaphylos viscida subsp. pulchella Dylan M. Neubauer, Tim Forsell 2016-3-30 591 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  RSA589937  Arctostaphylos viscida subsp. viscida Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7301 Colusa Along Brim Rd., 1.9 mi. W juct . Bear Valley Rd. Comment
  SBBG114894  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Colusa Brim Rd 396 Comment
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Dec 10 2014
  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
  UC1299490  Arenaria congesta var. crassula Freed W. Hoffman 1947-6-20 1608 Colusa Nort Coast Ranges, summit of Goat Mountain Comment
  CDA11924  Argemone munita G. F. Hrusa 1989-5-7 6077 Colusa North Coast Biodiversity Arena; Cedar Mtn. Rd. along Little Stony Creek, approx. 4 miles above intersection with Stonyford-Lodoga Rd. Comment
  UCD82129  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
  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
  SBBG29992  Argemone munita L. Constance 1939-5-14 2490 Colusa 1 mi E of Mill Crk Ranger Station 548 Comment
  UCD95197  Argemone munita K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  CAS-BOT-BC401745  Argemone munita subsp. rotundata Roxana S. Ferris 1926-4-23 6455 Colusa Field at Stonyford Comment
  CAS-BOT-BC400398  Aristolochia californica Roxana Stinchfield 1916-7-8 377 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CHSC36974  Arnica mollis J. D. Jokerst 1982-8-11 1644 Colusa North Coast Ranges. Snow Mt. West Peak ca 100 m NE of summit. 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
  CHSC94281  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110139  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCD81224  Artemisia douglasiana Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5561 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. Canyon to the south of Destanella Flat. 443 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  UC1585916  Asclepias cordifolia Barbara Ertter 1989-7-1 8603 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); South Fork Stony Creek 1500 Comment
  CHSC75583  Asclepias speciosa Vernon H. Oswald; Lowell Ahart 1999-6-22 9774 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd. 624 Comment
  UCD82583  Astragalus breweri Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2728 Colusa Walker Ridge, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  CHSC91565  Astragalus clevelandii D. Isle 1995-7-12 393 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Adjacent to BLM parcel 281-C. 585 Comment
  UCD58179  Astragalus clevelandii Gordon Harrington 2007-5-31 69 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
  HSC72171  Astragalus gambelianus Thomas W. Nelson, Jane P. Nelson 1978-4-2 9548 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 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
  SEINET4208041  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 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.; 0 558 Comment
  UC638665  Astragalus gambelianus Ethel Crum 1938-5-7 2017 Colusa 4.2 mi n Rumsey (Inner North Coast Range, summit of ridge); Inner North Coast Range, summit of ridge, n of Rumsey 254 Comment
  UCD169698  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 Colusa Along Highway 20 just east of the Colusa/Lake County Line ca. 14.6 miles east of the junction of State Highways 20 and 53. 558 Comment
  JEPS75764  Astragalus purshii var. tinctus L. R. Heckard and R. Bacigalupi 1976-9-6 4453 Colusa above Summit Springs (Snow Mt., Colusa-Lake County Line); Snow Mt., above Summit Springs 1645 Comment
  SEINET4673433  Astragalus rattanii Richard 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 State Hwy. 20 and 53.; 0 558 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
  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
  UCD163317  Astragalus rattanii var. jepsonianus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. 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
  UCD56928  Astragalus rattanii var. jepsonianus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3531 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Saddle between Craig and Thompson Canyons. 394 Comment
  UCD63923  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 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
  UCD64415  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 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 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
  HSC89736  Astragalus tener Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 10 Colusa 1.2 mi. S of Brim Rd. on Bear Valley Rd. 396 Comment
  NY5728  Astragalus tener var. ferrisiae R. S. Ferris 1926-4-21 6281 Colusa 3 Mi W of Colusa. Comment
  RSA0003126  Astragalus tener var. ferrisiae Roxana S. Ferris 1926-4-21 6281 Colusa 3 mi W of Colusa.. Comment
  CHSC115389  Athysanus pusillus Lowell Ahart 2015-4-1 19995 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  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
  SEINET11193155  Athysanus pusillus R. R. Halse 2013-3-27 8763 Colusa Along Hwy 20 just E of the Colusa/Lake County line, ca 14.6 miles E of the junction of Hwy 20 and Hwy 53. 558 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
  CAS-BOT-BC17403  Athysanus pusillus Volney Rattan 1884-1-1 s.n. Colusa Unspecified. Comment
  UCD63023  Athysanus unilateralis Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4675 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 west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  RSA670513  Atriplex cordulata Stan C. Spencer 2002-8-8 unnumbered Colusa ca. 3-6 miles E of Colusa, along California Highway 20. Comment
  JEPS90590  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
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Jun 18 2015
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 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
  UC205343  Atriplex persistens H. M. Hall 1920-7-12 11012 Colusa w Princeton; w of Princeton Comment
  JEPS108755  Atriplex rosea 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
  JEPS90604  Atriplex rosea Dean W. Taylor 1989-8-6 10509 Colusa Delevan National Wildlife Refuge Sacramento Valley (sw margin) Comment
  JEPS90637  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Rd., along ditchbank) 39 Comment
  JEPS90638  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Rd., along ditchbank) 39 Comment
  CAS-BOT-BC146205  Avena barbata Roxana S. Ferris 1917-4-14 591 Colusa Arbuckle - Rumsey Road. 3 miles west of Arbuckle. 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
  CHSC83697  Avena fatua L. P. Janeway 2002-4-24 7523 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 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
  UCD66444  Avena fatua Craig D. Thomsen 2000-4-28 2213 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
  UCD82621  Avena fatua Craig Thomsen; G. Harrington 2009-5-12 2891 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 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
  UCR201551  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14260 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CAS-BOT-BC98201  Baccharis salicifolia Roxana S. Ferris 1917-4-18 633 Colusa Banks of Sacramento River near Sycamore Slough Comment
  SEINET7239582 Image available Baccharis salicifolia R. R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20, ca. 7.8 miles NE of its junction with State Hwy. 16 at base of Salt Canyon 100 Comment
  UCD57629  Baccharis salicifolia Michele Lanctot; 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. Central part of ranch. Thompson Canyon. In the middle of a creek bed. 361 Comment
  UCD163865  Baccharis salicifolia subsp. salicifolia Craig D. Thomsen 2001-5-31 2550 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  HSC41860  Balsamorhiza macrolepis K. Irwin 1977-4-24 299 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 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
  UCD74307  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  UCD82618  Balsamorhiza macrolepis var. macrolepis Craig Thomsen; G. Harrington 2009-5-12 2887 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. Southeast side of Eaton Springs complex. 710 Comment
  UC1191425  Bassia hyssopifolia Herbert L. Mason 1946-8-6 12958 Colusa pond on Colusa-Marysville Highway four mi s Colusa (w side of Sacramento River); w side of Sacramento River Comment
  SD131864  Bergia texana Barbara Ertter, Elizabeth Neese, et al. 1989-10-21 8869 Colusa Southeast end of East Park Reservoir north of Lodoga. 365 Comment
  UCR71523  Bergia texana Barbara Ertter, Et al. 1989-10-21 8869 Colusa SE end of East Park Reservoir north of Lodoga 366 Comment
  UCSB61646  Bergia texana Ertter, Barbara 1989-10-21 Colusa SE end of East Park Reservoir N of Lodoga 365 Comment
  CHSC42573  Berula erecta Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306. 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  UC1532346  Berula incisa Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Road (M10) at Candy Bucket Spring, 6.0 miles W of Road 306, 0.4 mi E of junction John Smith Road (M5). Comment
  JEPS73511  Boechera breweri subsp. breweri L. R. Heckard 1972-7-10 3129 Colusa 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  CHSC36976  Boechera repanda J. D. Jokerst 1982-8-11 1647 Colusa North Coast Ranges. Lake-Glenn-Colusa tricounty jct. On the northeast face of the West Peak of Snow Mt. ca. 300 meters ne of the summit. Comment
  JEPS15548  Boechera repanda G. Thomas Robbins with L. R. Heckard 1956-7-25 3705 Colusa along trail due s Snow Mt. East (and skirting the e base of the ridge forming Snow Mt. West); Snow Mt. West 1981 Comment
  JEPS73484  Boechera repanda L. R. Heckard 1972-7-9 3095 Colusa se slope Snow Mt. East Peak; Snow Mt. 2072 Comment
  RSA724954  Boisduvalia densiflora var. densiflora L. Ahart 2006-8-9 13140 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC83230  Bolboschoenus glaucus June McCaskill; Harvey, Loren Davis 1954-8-9 361 Colusa Ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. In rice plot. Comment
  CHSC94729  Bolboschoenus glaucus Lowell Ahart 2006-9-26 13351 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
  UCD163073  Bolboschoenus glaucus Vic Claassen 2016-3-8 s.n. Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Central part of Ranch to the south of Lynch Canyon. Southeast corner of an agricultural pond ( created from dammed drainage) known as Moonscape Pond. 458 Comment
  CAS-BOT-BC75490  Bolboschoenus glaucus B. Crampton 1953-4-29 1150 Colusa 4 miles east of Norman. Comment
  UCD18527  Bolboschoenus glaucus June McCaskill; with Mr. Harvey and Loren Davis 1954-8-9 361 Colusa ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. Comment
  CAS-BOT-BC31371  Bolboschoenus maritimus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 467 Colusa Davis tule, near Sycamore Slough Comment
  UCD163660  Bolboschoenus maritimus subsp. paludosus Craig Thomsen 1998-6-10 1959 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  UCD140020  Bolboschoenus maritimus subsp. paludosus C. F. Dunshee 1922-7-28 24 Colusa Cortina. 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
  IRVC29685  Brickellia grandiflora Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5033 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-BC127866  Brickellia greenei Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5034 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. 1989 Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  CHSC112031  Briza minor David Isle 1988-5-11 2100 Colusa Moon Glade (E of Trout Ck Trailhead) 1/2 mi W of Fouts Springs; Middle Fork Stony Creek Watershed, Mendocino National Forest. 621 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
  UCD139168  Brodiaea elegans subsp. elegans Grady L. Webster 1977-5-15 7678 Colusa Bear Creek, ca. 0.5 mile west of junction of Wilbur Springs Road and Rtw. 20. 350 Comment
  HSC45669  Bromus arenarius Stephen Plant 1978-4-22 204 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC45720  Bromus arenarius M. Alcasas 1978-4-22 47 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CAS-BOT-BC155997  Bromus diandrus Roxana S. Ferris 1926-4-21 6277 Colusa Sycamore Slough 2 miles from Sycamore. Comment
  HSC98348  Bromus diandrus Brent Helm, Curtis Miller, Mark Steiger 1988-4-16 63 Colusa Stonyford, off side road underneath Blue Oaks 366 Comment
  UCD58523  Bromus diandrus Beecher Crampton 1962-4-17 6215 Colusa Sycamore. Comment
  SEINET3922244  Bromus diandrus S. Bowie, J. Lopez; D. Riess 1994-4-23 171 Colusa Leesville Quadrangle, Walker Ridge (BLM property). Collected along Bear Valley Road in Bear Valley, approx. 2.1 km south of intersection with Brimm Road.; 0 663 Comment
  UCD58684  Bromus hordeaceus A. A. Beetle 1942-5-21 3272 Colusa 12 miles north of Williams. Comment
  UCD58711  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. Comment
  UCD66447  Bromus japonicus Craig D. Thomsen 2000-5-11 2292 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
  HSC31698  Bromus laevipes Thomas E. Higley 1974-5-4 63 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  UC1055952  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa near confluence of North and Middle forks of Stoney Creek (Red Bridge Camp, Mendocino National Forest); Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  UCD72529  Bromus laevipes Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3820 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 along trail that begins approximately opposite the BLM parking lot near south end of bridge. Approx. 0.75 mile along trail. 286 Comment
  CDA16100  Bromus madritensis subsp. rubens G. F. Hrusa 1999-5-16 15043 Colusa North Coast Ranges; Slopes above Fouts Springs, on serpentine, immediately below Verbena spring. Few on roadside, scattered here, dominant in a few sites. Annual. 594 Comment
  UCD57058  Bromus madritensis subsp. rubens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3645 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
  UCD66914  Bromus madritensis subsp. rubens 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. Just downslope of basin near top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 457 Comment
  CHSC94853  Bromus pseudolaevipes Lowell Ahart 2006-6-11 12670 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
  SEINET4404370  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  SEINET3923292  Bromus rubens Christopher Knopp 1978-4-22 17 Colusa Wilbur Springs Quad. Bear Valley Road 1.5 miles from its junction with State Route 20.; 0 411 Comment
  UCD59764  Bromus tectorum Beecher Crampton 1958-5-19 4808 Colusa West of Lodoga. Comment
  UCD67035  Bromus tectorum Ellen Dean; Davis Botanical Society 2008-5-31 5016 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 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
  UC1183418  Cacaliopsis nardosmia J. M. Tucker and John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout, Goat Mountain and upper Letts Valley (ca. 2.5 mi air n of lookout) Comment
  UCD129652  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3519 Colusa Trough Spring, at northeast end of Trough Spring Ridge, ca. 5.75 miles (airline) southwest of Stonyford. 975 Comment
  CDA42953  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa Inner North Coast Range; On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. Comment
  UCD169351  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC59333  Calandrinia ciliata Mark Hershkovitz 1991-5-3 Colusa Bear Valley, along Bear Valley Rd. Plants common near fenceline in central region of valley. Comment
  RSA783301  Calandrinia ciliata R. R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca. 10 miles N of Colusa (junction of State Hwys 45 & 20). 22 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
  UCD57308  Calandrinia ciliata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3679 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 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
  UCD103570  California macrophylla Craig Thomsen 2011-3-28 s.n. Colusa BLM Bear Creek (formerly Payne) Ranch. W of intersection of Hwys 16 and 20; E side of 'Serpentine Creek.' Drainage runs north from Bear Creek Ranch flowing under pull out along Hwy 20. 335 Comment
  UCD57817  California macrophylla Gordon Harrington 2007-3-22 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. 472 Comment
  JEPS122382  Calochortus amabilis Nisrine Machaka-Houri with Gracie Benson-Martin 2014-5-3 NG 2 Colusa Bear Valley Road Comment
  UC1049549  Calochortus amabilis Rimo Bacigalupi 1950-4-16 3110 Colusa e outskirts Stony Ford (town) (vicinity of Colusa-Glenn County line); Inner North Coast Ranges Comment
  UCD139472  Calochortus amabilis K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  CAS-BOT-BC492124  Calochortus amabilis Roxana S. Ferris 1926-4-23 6447 Colusa Grapevine grade between Stonyford and Sites Comment
  UCD63617  Calochortus amabilis Craig D. Thomsen 1999-5-12 2030 Colusa BLM Payne Ranch. Approximately 0.5 mile southwest of intersection of Hwy 16 and Hwy 20. On large knoll. Comment
  CHSC89879  Calochortus luteus B. Castro; L. Janeway 2001-5-10 1248 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 on steep E-facing slope 396 Comment
  CAS-BOT-BC491931  Calochortus luteus J. Clausen 1935-5-20 1012 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
  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
  UCD139570  Calochortus splendens K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  JEPS80134  Calochortus tolmiei L. R. Heckard with J. Hickman 1980-7-2 5294 Colusa ca 10 mi w Stonyford (just above (ne of) Summit Springs, sw of Snow Mt. peaks, Colusa-Lake County boundary) 1584 Comment
  CAS-BOT-BC132571  Calochortus uniflorus Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley nr. Leesville 304 Comment
  CHSC53987  Calochortus uniflorus Vernon H. Oswald 1991-4-21 4523 Colusa Bear Valley Rd in Bear Valley, 4.6 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. 417 Comment
  HSC83384  Calochortus uniflorus Bob Wych 1975-4-20 16 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. Comment
  JEPS39672  Calochortus uniflorus Rimo Bacigalupi, T. Crovello and L. Heckard 1965-4-26 9045 Colusa 4.0 mi s point where road takes off w to Bartlett Springs; Bear Valley Comment
  RSA296716  Calochortus uniflorus Thomas Wood 1979-4-14 110 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  RSA304209  Calochortus uniflorus James R. Shevock 1972-3-25 1449 Colusa Bear Valley. 396 Comment
  UC1049544  Calochortus uniflorus Rimo Bacigalupi 1950-4-16 3126 Colusa Bear Creek, along road down middle of Bear Valley, about BM 1326 Bear Valley Comment
  SEINET8197763  Calochortus uniflorus M. J. Williams 1967-5-7 1187 Colusa Bear Valley. Comment
  UCD63912  Calycadenia fremontii Craig D. Thomsen 2000-6-23 2401 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 (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCD69191  Calycadenia multiglandulosa P. Rodriguez-Rojo; D. Sanchez-Mata 1997-7-25 s.n. Colusa Clear Lake-Williams. Southward Bear Valley Rd. D 415 Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  CHSC112620  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 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
  RSA0118882  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 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
  UC1299279  Calycadenia pauciflora Freed W. Hoffman 1947-6-20 1619 Colusa road from Stonyford to Fouts Springs Paskenta; North Coast Ranges 502 Comment
  UCD61447  Calycadenia pauciflora Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3892 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. 368 Comment
  UCD63726  Calycadenia pauciflora Craig D. Thomsen 2008-5-23 2737 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  UCD82487  Calycadenia pauciflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 a 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
  UCR261752  Calycadenia pauciflora Ann Howald 2003-5-29 2351 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  CAS-BOT-BC270742  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 mile W of Leesville - Lodoga Road on road to Cook's Springs Comment
  CAS-BOT-BC270746  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile E of Lake County line on Bartlett Springs Road Comment
  CAS-BOT-BC270747  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Creek Trail, 0.5 mile NW of driveway to Fout Springs Boy's Ranch 502 Comment
  CAS-BOT-BC270749  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles N of Stoneyford on road to Fout Springs 609 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-BC270756  Calycadenia pauciflora H. M. Hall 1930-10-3 12936 Colusa 2 miles S of Stoneyford Comment
  RSA255526  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2 miles southwest of Leesville on road to Bartlett Springs 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
  UC1876632  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 mi N of Yolo Co. line on Hwy 16. 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
  UCD129805  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa on road to Trout Creek Trail, 0.5 mile northwest of driveway to Fout Spr. Boy's Ranch. 502 Comment
  UCD129895  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles north of Yolo County line Hwy 16. Comment
  UC1543009  Calycanthus occidentalis Donald G. Nelson et. al. 1940-6-9 694 Colusa Happy Creek Camp Stony Creek, Paradise Creek (on Paradise Creek, which empties into middle fork of Stony Creek, nw corner of Colusa County) 731 Comment
  UCD82572  Calycanthus occidentalis Craig Thomsen 2008-6-12 2763 Colusa Walker Ridge, Elgin Mine area. Comment
  UC1299369  Calyptridium monospermum Freed W. Hoffman 1948-6-26 2512 Colusa western Goat Mountain Goat Mountain Comment
  JEPS81077  Calyptridium quadripetalum Thomas W. Nelson and Jane P. Nelson 1980-6-24 5880 Colusa along trail to Snow Mountain trail head at Summit Springs, Six Rivers National Forest Summit Springs (Lake Pillsbury Quadrangle); Six Rivers National Forest, Snow Mountain trail 1584 Comment
  UC1731405  Calyptridium quadripetalum Dean W. Taylor 1998-6-23 16713 A Colusa ca. 1 mi. s.e. Baldy Mt. (stock pond at head Doyle Canyon); N. coast Range Region (NCoRI), Walker Ridge, Doyle Canyon 853 Comment
  UCD163878  Calystegia collina Craig D. Thomsen 2001-5-24 2534 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  HSC48190  Calystegia collina subsp. collina Thomas W. Nelson, Jane Nelson 1978-4-29 3965 Colusa Along Hwy. 20 just E of Colusa-Lake Co. line 549 Comment
  UCR138664  Calystegia collina subsp. collina B. Ellyson, J. Hooke, D. Newman 1996-5-4 38 Colusa Wilbur Springs, Walker Ridge Road. 8.4 mi north of alker Ridge Road and Indian Reservoir Road intersection on Walke Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  RSA394936  Calystegia collina subsp. collina Eugene Memmler 1969-5-8 106 Colusa Hwy 20, Between Williams and Clear Lake. 152 Comment
  UCD126150  Calystegia occidentalis Collector Unknown 1918-1 s.n. Colusa Bear Valley. Comment
  HSC45719  Camissonia contorta Sheila Logan 1978-4-22 27 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72156  Camissonia graciliflora J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9544 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  HSC45729  Camissonia ignota Mark Flippo 1978-4-22 15 Colusa Bear Valley Rd., 1.5 mi. from its jct. with Hwy. 20 412 Comment
  CHSC112226  Camissoniopsis hirtella Lowell Ahart 2013-5-1 18671 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
  JEPS85535  Camissoniopsis hirtella L. R. Heckard 1969-5-28 2231 A Colusa near junction of Stonyford-Fouts Spring Rd. and Spring Ridge Rd. (1.5 mi ne of Fouts Spring) 670 Comment
  UCD146729  Camissoniopsis hirtella G. F. Hrusa 1998-6-19 14613 Colusa Inner North Coast Ranges. Above upper Little Stony Creek. Goat Mountain Roud around 1.5 km west of campground. 485 Comment
  UCD37191  Camissoniopsis hirtella Beecher Crampton 1958-5-19 4807 Colusa 4-8 miles south of Lodoga, Little Stony Creek Canyon. 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
  UCD64045  Capsella bursa-pastoris Craig D. Thomsen 2000-3-8 2037 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
  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
  UCR238927  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2012-2-9 18532 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CDA30193  Cardaria chalepensis D. Isle 2007-4-13 1633 Colusa East of Maxwell ~ 1 mile; south of Maxwell Road and East of Lyons Road in ditch between rice fields east of William Dirk s shop. Comment
  UCR200671  Cardaria draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch, southwest of intersection between Hwy 16 and Hwy 20, along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20 Comment
  SEINET10644548  Carex Roxana S. Ferris 1917-4-17 Ferris 607 Colusa Moist earth in an oak grove. Sycamore Slough. Comment
  CDA33019  Carex angustata P. T. Zwanck 1964-4-28 Colusa 5 miles north of Colusa, on levee. 0 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
  RSA523880  Carex bolanderi Barbara Ertter 1989-7-1 8607 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
  CHSC91548  Carex fracta Barbara L. Wilson; Richard Brainerd, David Isles, Lawrence Janeway 2002-6-28 10706 Colusa Ford Spring, on eastern end of Pine Ridge, overlooking Trout Creek; on Goat Mountain Road above the Trout Creek Bridge on the Pine Ridge grade, within 1/2 mile of Trout Creek. In roadside ditch. UTM: 10S 533575e 4343812n. 630 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
  JEPS75122  Carex hoodii L. R. Heckard 1972-7-10 3114 Colusa Trout Creek crossing of trail to Box Spring; Snow Mt., Trout Creek 1828 Comment
  JEPS80383  Carex hoodii L. R. Heckard and J. Hickman 1981-6-22 5616 Colusa along Dark Hollow Creek Snow Mt., Dark Hollow Creek 1889 Comment
  JEPS75132  Carex jonesii L. R. Heckard 1972-7-8 3060 Colusa upper reaches of Dark Hollow Creek in saddle between East Peak of Snow Mt. and West Peak of Snow Mt.; Snow Mt., Dark Hollow Creek 1981 Comment
  CAS-BOT-BC118347  Carex praegracilis Roxana S. Ferris 1917-4-19 718 Colusa Marshy ground in oak grove, Sacramento River near Sycamore Slough. Comment
  CHSC76354  Carex praegracilis L. P. Janeway; B. Castro 1999-7-5 6499 Colusa At Bear Wallow Spring; on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. 1045 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
  UCR228283  Carex praegracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4947 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 20 399 Comment
  JEPS81282  Carex serratodens L. R. Heckard and J. C. Hickman 1982-7-5 5893 Colusa s. side Snow Mt. (Summit Springs, slope below (s. of) area); Summit Springs 1500 Comment
  UCD82442  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5666 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
  JEPS81046  Castilleja affinis subsp. affinis Thomas W. Nelson and Jane P. Nelson 1979-4-11 4612 Colusa 5 mi e Leesville (along the Leesville to State Route 20 cutoff) Comment
  CDA12181  Castilleja applegatei subsp. martinii G. F. Hrusa 1993-5-2 10863 Colusa Frenzel Creek Research Natural Area; Point of ridge above mouth of Frenzel Creek, tributary of Little Stony Creek. S. side of creek. Comment
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
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Mar 2 2015
  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
  HSC71313  Castilleja applegatei subsp. martinii Thomas W. Nelson, Jane P. Nelson 1979-4-11 4612 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  CHSC27516  Castilleja attenuata Michael F. Henetz 1978-4-15 6 Colusa Ca. 150 m s of Hwy 20, ca. .5 km w of Williams. S central border of Section 36. 322 Comment
  CHSC86031  Castilleja attenuata 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
  HSC47735  Castilleja attenuata Thomas W. Nelson, Jane P. Nelson 1978-4-29 3940 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  RSA0011988  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UC719289  Castilleja attenuata F. G. Meyer 1938-4-5 1348 Colusa about 20 mi n Williams Comment
  UCD64255  Castilleja attenuata Craig D. Thomsen 2000-3-31 2056 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
  UCD40887  Castilleja exserta R. Rhode 1984-4-21 s.n. Colusa 10 miles north of intersections of highways 16 and 20 in Bear Valley. 426 Comment
  CHSC89874  Castilleja exserta subsp. exserta B. Castro; S. Innecken 2001-3-26 1218 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. On top of small knoll. 91 Comment
  JEPS10302  Castilleja exserta subsp. exserta W. L. Jepson 1932-5-7 16255 Colusa 1 mi above Venado (sw Colusa County) 274 Comment
  HSC67098  Castilleja exserta subsp. exserta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 42 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  HSC85948  Castilleja exserta subsp. exserta Michalski, Raum, Hopson 1987-4-21 58 Colusa Leesville Rd. Comment
  HSC45672  Castilleja foliolosa Stephen Plant 1978-4-22 207 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72142  Castilleja foliolosa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9574 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC87084  Castilleja foliolosa L. Blackford, S. Branch, D. Malm 1988-4-16 68 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  JEPS8775  Castilleja foliolosa Alice King May 1906 Colusa College City Comment
  UC903713  Castilleja foliolosa Milo S. Baker 1947-4-6 11642 Colusa near Colusa-Lake Co. line (along Highway 20) Comment
  HSC97657  Castilleja foliolosa Danny Pineda 2001-4-21 7 Colusa Found at Walker Ridge area 671 Comment
  SBBG128775  Castilleja foliolosa L. Ahart 2013-4-26 18642 Colusa rocky serpentine outcrop on the N side of State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  JEPS81325  Castilleja miniata L. R. Heckard and J. C. Hickman 1982-7-6 5940 Colusa about 0.5 mi ne Summit Springs (s side of Snow Mt, e of trail); Snow Mt. 1645 Comment
  JEPS82554  Castilleja miniata L. R. Heckard 1983-7-27 6101 Colusa ca 2 mi w Stonyford road; Little Stony Creek 411 Comment
  UC1238982  Castilleja minor subsp. spiralis Freed W. Hoffman 1947-6-19 1663 Colusa Cook's Spring; North Coast Ranges Comment
  UCD169353  Castilleja rubicundula Lowell Ahart 2013-5-1 18687 Colusa North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS11154  Castilleja rubicundula subsp. lithospermoides W. L. Jepson 1938-6-9 18964 Colusa mountains between Indian Valley and Bear Valley (between Lake County and Colusa County) 579 Comment
  CHSC115382  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2015-4-1 19987 Colusa Along 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
  CHSC56783  Castilleja rubicundula subsp. rubicundula Peggy Brennan 1980-4-19 107 Colusa Ca 0.3 mi west of junction of Hwy 20 and Hwy 16; south side of Bear Creek, ca 18 mi southwest of Williams. 321 Comment
  JEPS11156  Castilleja rubicundula subsp. rubicundula W. L. Jepson 1932-5-8 16284 Colusa Stonyford; w Colusa County 365 Comment
  UCD57296  Castilleja rubicundula subsp. rubicundula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3667 Colusa BLM Payne Ranch. Near origin of Craig Canyon. Close to Thompson Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 349 Comment
  UCD114214  Caulanthus flavescens W. C. Overton Jr. 1980-4-14 s.n. Colusa Into Bear Valley, ca. 1 mile N of junction of State Highway 16 and 20. Comment
  CHSC112311  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 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
  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
  UCD67002  Caulanthus lasiophyllus Craig D. Thomsen 2008-5-23 2748 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  CDA12246  Ceanothus cuneatus G. F. Hrusa 1989-2-7 5808 Colusa Inner North Coast Ranges; Leesville Road between Bear Valley & Williams. Comment
  UCD170262  Ceanothus integerrimus D. O. Burge 2016-11-3 2186 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 610 Comment
  UCD82544  Ceanothus integerrimus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5699 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  UCD84453  Ceanothus integerrimus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  HSC90415  Ceanothus jepsonii C. Wilson, P. Kittelson, M. Hardig 1992-4-11 42 Colusa Walker Ridge Rd., 1.0 mi S of Blue Oak Recreation Site 76 Comment
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Aug 18 2014
  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
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  HSC98207  Ceanothus oliganthus var. sorediatus Steven Lagos 1974-5-4 43 Colusa 747 Comment
  UCD66479  Centaurea calcitrapa Craig D. Thomsen 2001-5-6 2556 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. 310 Comment
  CHSC84199  Centaurea melitensis Lowell Ahart 2003-7-14 10387 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  UCD82829  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
  POM53290  Centaurea solstitialis W. R. Mumma 1897-9-3 s.n. Colusa Grand Island Comment
  JEPS94758  Centaurium trichanthum Vernon H. Oswald and Lowell Ahart 1998-7-15 9267 B Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road 487 Comment
  UC1051723  Centaurium trichanthum Helen K. Sharsmith 1953-6-19 4273 Colusa e slope Snow Mountain (on Bonny Doon road); Inner North Coast Ranges, Mendocino National Forest 670 Comment
  UCD82477  Centromadia Craig Thomsen; G. Harrington 2009-5-12 2855 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC107285  Centromadia fitchii L. P. Janeway; B. Castro 2011-7-9 10505 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. Generally natural area centered around a shallow ephemeral alkaline marsh and adjacent wetland swales. In an area that is not quite a vernal pool near the eastern boundary of the area. 49 Comment
  JEPS68349  Centromadia fitchii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2789 Colusa on Ladoga rd about 3 mi s Stonyford 335 Comment
  UCD18849  Centromadia fitchii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 157 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
  CAS-BOT-BC281221  Centromadia fitchii Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCD66917  Centromadia parryi subsp. parryi Craig D. Thomsen; G. Harrington 2008-7-6 2784 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
  CHSC107928  Centromadia parryi subsp. rudis B. Castro; Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Towards S end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  UC727676  Centromadia parryi subsp. rudis Milo S. Baker 1946-9-5 11624 Colusa 3 mi w of Colusa; Williams Comment
  UCD16094  Centromadia pungens J. Schmierer 1999-4-27 s.n. Colusa Exact location unknown. Comment
  CAS-BOT-BC279211  Centromadia pungens subsp. pungens R. F. Hoover 1936-5-22 1218 Colusa Williams Comment
  JEPS105679  Centromadia pungens subsp. pungens L. P. Janeway 2002-4-25 7525 Colusa Sacramento Valley; vicinity of Funks Creek and Tehama - Colusa Canal 51 Comment
  CHSC105205  Centromadia pungens subsp. septentrionalis K. R. Stern 1980-6-1 6643 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 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
  SEINET8730526 Image available Cephalanthus occidentalis Unknown 1946-1 7839 Colusa Butte Creek, 1 mile north of Butte Outing Gun Club, near Colusa, Colusa County. 6 Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. 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
  CAS-BOT-BC388223  Cerastium glomeratum Roxana S. Ferris 1917-4-1 497 Colusa 4 miles East of Williams Comment
  SEINET11587890  Cercis canadensis var. texensis Unknown 2009-3-11 14378 Colusa Williams Comment
  HSC31623  Cercis occidentalis Glenn McGourty 1974-4-20 7 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
Read comments
Aug 13 2014
  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
  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
  RSA670064  Cercocarpus betuloides G. L. Webster 1989-5-6 7698 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  CAS-BOT-BC136987  Cercocarpus betuloides var. betuloides Roxana S. Ferris 1926-4-23 6419 Colusa Grade beyond Mountain House on Williams - Stonyford Road Comment
  UC1543051  Cercocarpus betuloides var. betuloides Donald G. Nelson et. al. 1940-6-8 679 Colusa several mi above Bonnie View (w boundary of Snow Mountain, Snow Mountain Trail); Snow Mountain, Snow Mountain Trail 1066 Comment
  UCR206710  Cercocarpus betuloides var. betuloides George K. Helmkamp, E. A. Helmkamp 2009-3-17 14397 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
  JEPS81415  Chaenactis douglasii var. douglasii L. R. Heckard and J. C. Hickman 1982-7-9 6023 Colusa near summit of, Lookout Goat Mt. (Colusa-Lake Counties boundary) Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain Comment
  CDA12016  Chaenactis glabriuscula G. F. Hrusa 1990-4-8 7668 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  JEPS94218  Chaenactis glabriuscula var. heterocarpha Vernon Oswald and Lowell Ahart 1998-5-7 9011 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads) 633 Comment
  HSC49867  Chaenactis glabriuscula var. heterocarpha J. P. Smith, J. O. Sawyer 1978-4-29 9778 Colusa Lake/Colusa County Line; Walker Ridge Rd., 4.8 mi. N from the T-intersection to Indian Valley Reservoir 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
  JEPS90921  Chamaesyce hooveri Dean W. Taylor 1993-8-31 14071 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  CHSC94455  Chamaesyce maculata Lowell Ahart 2006-8-9 13170 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC61423  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Joseph Silveira 1993-8-16 5803 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. On the N bank of Hunters Creek. 24 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
  JEPS108744  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13104 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  JEPS120711  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 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
  JEPS15549  Cheilanthes gracillima G. Thomas Robbins with L. R. Heckard 1956-7-25 3706 Colusa due s of Snow Mt East (and skirting e base of ridge forming Snow Mt West) 1981 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
  CHSC94513  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA724958  Chenopodium botrys L. Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UC1053454  Chenopodium californicum Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3167 Colusa 8 mi nw Maxwell (along road to Sites, in canyon through first hills on extreme w edge of valley); Sacramento Valley Comment
  UCD168861  Chenopodium strictum var. glaucophyllum John Anderson 2015-1 s.n. Colusa about 0.5 mile north of Colusa Casino west of Highway 45. Comment
  JEPS80466  Chimaphila menziesii Alice Q. Howard 1972-7-10 8 Colusa wet mossy spring area crossing trail from Fouts Camp to Box Springs (highest of 2 areas on n. side of ridge separating Trout & Paradise Creeks); Snow Mt. 1676 Comment
  UCD37231  Chloris gayana Beecher Crampton 1958-6-27 4980 Colusa Colusa County, 2.5 miles south of Grimes. Comment
  UCD57921  Chloris gayana Beecher Crampton 1958-6-27 4980 Colusa 2.5 miles south of Grimes. Comment
  UCR228651  Chlorogalum pomeridianum Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4933 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 20 348 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
  CHSC86966  Chorizanthe membranacea B. Castro; Michelle Cedarborg 2003-5-6 1430 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. 219 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
  UCD57280  Chorizanthe membranacea Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3648 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
  UC1532347  Cicuta Vernon Oswald 1986-6-30 2176 Colusa North end of Lily Pond near Letts Lake. 1188 Comment
  CHSC93137  Cicuta douglasii D. Isle 2001-7-26 1388 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In spring west of Letts Lake day use area. Comment
  UCD84429  Cirsium occidentale Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6044 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CDA15471  Cirsium occidentale var. venustum G. F. Hrusa, WTD 1998-6-19 14608 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  UC1543160  Cirsium occidentale var. venustum Charlotte Nash Smith 134 Colusa Williams, Lake Co. Road Colusa Comment
  UCD58173  Cirsium occidentale var. venustum Gordon Harrington 2007-5-31 63 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  CHSC83595  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate. 124 Comment
  CHSC86125  Clarkia affinis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CHSC86959  Clarkia affinis B. Castro 2003-4-10 1421 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In E-trending small side canyon tributary. 158 Comment
  UCD57561  Clarkia affinis Stephanie Castle; 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. 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, on small rise south of Craig Creek. 304 Comment
  CDA37986  Clarkia affinis T. C. Fuller 1958-5-28 s.n. Colusa Highway 20, 2 miles west of junction with Highway 16. 0 Comment
  CAS-BOT-BC164146  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs 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
  CAS-BOT-BC164149  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  CHSC1095  Clarkia concinna subsp. concinna V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  JEPS108811  Clarkia concinna subsp. concinna Lowell Ahart 2006-6-11 12668 Colusa On the west side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  RSA163460  Clarkia concinna subsp. concinna Roxana S. Ferris 1926-4-23 6408 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCD66706  Clarkia concinna subsp. concinna Craig D. Thomsen 2001-5-24 2502 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
  POM216174  Clarkia concinna subsp. concinna D. D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur 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
  JEPS80137  Clarkia gracilis subsp. gracilis L. R. Heckard with J. Hickman 1980-7-2 5297 Colusa ca. 10 mi w Stonyford (just above Summit Spring entrance to Snow Mt. trail, Colusa-Lake County boundary) 1630 Comment
  UCD63108  Clarkia gracilis subsp. gracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4939 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
  UCD82386  Clarkia gracilis subsp. gracilis Craig Thomsen; G. Harrington 2009-5-12 2830 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
  JEPS122458  Clarkia gracilis subsp. sonomensis David Isle with F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of junction w/ Lodoga-Stonyford Road Comment
  CHSC112017  Clarkia gracilis subsp. sonomensis David Isle; F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of jct w/ Lodoga-Stonyford Road. 408 Comment
  CDA15461  Clarkia gracilis subsp. tracyi G. F. Hrusa, WTD 1998-6-19 14597 Colusa North Coast Ranges; Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CHSC79534  Clarkia gracilis subsp. tracyi G. F. Hrusa 1998-6-19 14597 Colusa Northern California. North Coast Ranges. Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. UTM: 10S, 05401 N, 43499 E. 400 Comment
  HSC94165  Clarkia gracilis subsp. tracyi G. Fred Hrusa 1998-6-19 14597 Colusa Along Little Stony Creek, on Goat Mtn. Rd., ~0.5 km W of intersection with Lodoga-Stonyford Rd. 400 Comment
  UCD146724  Clarkia gracilis subsp. tracyi G. F. Hrusa 1998-6-19 14597 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1/2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCD63104  Clarkia gracilis subsp. tracyi Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4935 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. 348 Comment
  UCD70216  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UC903259  Clarkia modesta Ethel Crum 1932-5-7 1462 Colusa Lodoga Inner North Coast Ranges Comment
  UCR138658  Clarkia purpurea A. Burgard, J. Goldsmith, J. Kalt 1996-5-4 72 Colusa 8.4 mi north of Indian Reservoir Road on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  UCD104856  Clarkia purpurea Kathryn Johnson 1966-5-14 53 Colusa Ca. 2 miles E of Lodoga on road from Maxwell. Comment
  CAS-BOT-BC163405  Clarkia purpurea subsp. quadrivulnera Roxana Stinchfield 1916-6-18 303 Colusa Near College City Comment
  CHSC89878  Clarkia purpurea subsp. quadrivulnera B. Castro; L. Janeway 2001-5-10 1247 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Andys Canyon. Near dirt road paralleling N-S-trending perennial creek, on moderately steep NNE-facing slope, just down from blue oaks in grassy opening. 390 Comment
  UCD82122  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5650 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
  UCR206289  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2009-5-20 14739 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  CDA15467  Clarkia rhomboidea G. F. Hrusa, WTD 1998-6-19 14604 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. approx. 2 km. W of campground. Comment
  CHSC72453  Clarkia rhomboidea L. P. Janeway; Dave Isle 1998-7-3 5707 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. On road cutbank. 1051 Comment
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  CDA11391  Claytonia exigua G. F. Hrusa, K. van Katwyk 1995-4-22 12111 Colusa Inner North Coast Ranges; Approximately 5 m. N of intersection of Walker Ridge Road and Highway 20. Comment
  CAS-BOT-BC439113  Claytonia exigua subsp. exigua James Jokerst 1985-4-5 2207 Colusa Near Coyote Peak. 456 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
  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
  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
  CHSC62941  Claytonia exigua subsp. glauca Vernon H. Oswald; Lowell Ahart 1994-4-6 6055 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. Locally abundant on gravelly soil of a roadside bank. 463 Comment
  SBBG128770  Claytonia exigua subsp. glauca L. Ahart 2013-5-1 18677 Colusa S side of wash, N side of State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  UCD162997  Claytonia parviflora Craig D. Thomsen 2000-3-31 2086 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.2 mile west of Hwy 20/16 intersection. 345 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
  CHSC72461  Claytonia parviflora subsp. parviflora L. P. Janeway; David Isle 1998-7-3 5708 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  UCD66965  Claytonia perfoliata Ellen Dean; Davis Botanical Society 2008-5-31 5009 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  JEPS86631  Claytonia perfoliata L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6691 Colusa parking area for trail to Snow Mountain Peaks 1625 Comment
  SEINET199005  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Mendocino National Forest ; Summit of Goat Mt. Lake-Colusa boundary 1864 Comment
  JEPS108908  Clematis ligusticifolia Lowell Ahart 2006-8-9 13094 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 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
  JEPS7323  Collinsia heterophylla Alice King Apr 1906 Colusa College City Comment
  UCD57100  Collinsia heterophylla Gordon Harrington; Diana Hickson 2007-4-7 0015 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UC2016539  Collinsia heterophylla Richard Olmstead 1984-4-28 523 Colusa North slope on Walker Ridge Road, ca. 2.4 miles north of CA 20. Road follows ridge that is Lake Co. - Colusa Co. line. 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
  SEINET13406348  Collinsia sparsiflora R. R. Halse 2013-3-26 8743 Colusa Indian Valley, along the Leesville-Logoda Road ca. 5.5 miles S of Logoda, 3.2 miles N of the junction of the Leesville and Bear Valley Roads. 426 Comment
  JEPS94165  Collinsia sparsiflora var. arvensis Vernon Oswald and Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodoga Rd. 4.2 mi. s. Stonyford 384 Comment
  POM253019  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa On Highway #20, 15 miles west of Williams. Comment
  UC638654  Collinsia sparsiflora var. collina Ethel Crum 1938-5-8 2029 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD57622  Collinsia sparsiflora var. collina Joseph A. E. Stewart; 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 part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  UC725811  Collinsia sparsiflora var. sparsiflora A. A. Heller 1937-4-24 Colusa 15 mi w of Williams Comment
  JEPS17960  Collinsia sparsiflora var. sparsiflora George B. Rossbach 1955-4-9 491 Colusa w edge Colusa Co., Rt 20 w edge Colusa Co. 563 Comment
  CHSC70989  Collomia diversifolia Vernon Oswald; Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. At roadside. 524 Comment
  UC1191132  Collomia diversifolia Herbert L. Mason 1953-5-5 14519 Colusa s end Cracker Box Ridge (along creek); Little Stoney Creek Comment
  UCD81711  Collomia diversifolia Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5717 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
  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
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  RSA0084708  Cordylanthus palmatus Ellen Cypher 2005-8-22 2005 -023 Colusa Delevan National Wildlife Refuge, Tract 12, CNDDB EO# 13 18 Comment
  UC2042496  Cordylanthus pilosus Holly Forbes and Barbara Keller 2009-7-1 Colusa Walker Ridge Rd about 6.2 mi. N of junction with Highway 20. Comment
  JEPS68404  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3147 Colusa Ladoga 487 Comment
  JEPS14919  Cordylanthus pringlei Rimo Bacigalupi with G. T. Robbins, L. T. Dempster, and L. R. Heckard 1956-7-26 5748 Colusa 1/2 mi above Fir-Root Spring Public Camp (at summit of ridge forming Colusa-Lake Co. line, on Colusa side, e of head of Long Ridge, region about 7 mi s of Snow Mountain) 1402 Comment
  UCD123114  Cordylanthus pringlei A. M. Shapiro 1994-8-16 s.n. Colusa Letts Valley Road, Canyon of Stony Creek. 1432 Comment
  UCD123116  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. 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
  SBBG50832  Cornus glabrata J. K. Clark 1966-5-8 23 Colusa Lodoga to Stonyford Rd, 2.5 mi NW of Lodoga 320 Comment
  SFV8758  Cornus glabrata J. K. Clark 1966-5-8 23 Colusa On Lodoga to Stongford Road, 2.5 miles northwest of Lodoga. 320 Comment
  UCD41212  Cornus glabrata John Snelling 1986-5-17 3 - Colusa 2.8 mi. west of Stonyford along Fouts Spring Road. Comment
  JEPS75756  Cornus sericea subsp. sericea L. R. Heckard and R. Bacigalupi 1976-9-6 4438 Colusa at margin of Trout Creek at trail crossing Snow Mt. 1828 Comment
  JEPS75866  Cornus sericea subsp. sericea L. R. Heckard 1974-9-10 3882 Colusa along East Circle Trail Snow Mt. (along spur running s.e. from West Peak) 2011 Comment
  CDA10282  Cotula coronopifolia Richard R. Halse 2007-3-23 7109 Colusa Williams; by junction of 5th Street and B Street. N 39.1586 W 122.14724 Comment
  CHSC107965  Cotula coronopifolia B. Castro; L. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; aproximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 Comment
  SEINET3872208  Crassula connata Richard R. Halse 2010-3-20 7827 Colusa Williams; by junction of 5th Street and B Street.; 0 25 Comment
  CHSC62886  Crassula tillaea Vernon H. Oswald 1994-3-14 5993 Colusa Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. Sacramento National Wildlife Refuge. 25 Comment
  JEPS86621  Crepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6701 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain); Snow Mountain 1500 Comment
  UC1221796  Crepis intermedia Beecher Crampton 1958-5-19 4803 Colusa 5.5 mi s Lodega Comment
  CHSC32200  Crepis monticola James Jokerst 1980-8-8 1078 Colusa North Coast Ranges. Near Snow Mountain (West). Hillside. Comment
  HSC72210  Crepis monticola Thomas W. Nelson, Jane P. Nelson 1980-6-24 5874 Colusa Colusa-Lake County line; Along trail to Snow Mtn. ca. 1/2 mi. from trailhead 1616 Comment
  UC572539  Cressa truxillensis H. S. Yates 1936-8-14 6133 Colusa 3 mi. s. Colusa; Colusa Quad. 15 Comment
  UCD18838  Cressa truxillensis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 145 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
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC94477  Croton setiger Lowell Ahart 2006-8-9 13114 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SACT000805  Crypsis aculeata Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa Comment
  JEPS120800  Crypsis alopecuroides Lowell Ahart 2013-10-1 19075 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
  CDA16109  Crypsis schoenoides G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15244 Colusa North Coast Ranges; Along Leesville Rd., +/- 1 mi S of Lodoga. 320 Comment
  CHSC77404  Crypsis schoenoides Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC94448  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104250  Crypsis schoenoides Lowell Ahart 2003-10-23 10675 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  POM313219  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Colusa Alkali plains near Butte Creek; Butte Lodge Outing Club, three miles above Colusa Comment
  CHSC115632  Crypsis schoenoides David Isle; Rhonda Isle 2014-9-27 2145 Colusa Northern Sacramento Valley foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch; within ~ 20 yards of normal lake edge in drying clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  SEINET4344589 Image available Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UCD145274  Crypsis schoenoides Barry Hammel 1976-8-5 427 Colusa east side of Highway 45 near Colusa Golf Club. 30 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
  UC1950107  Crypsis vaginiflora Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga Comment
  UCD56918  Cryptantha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3521 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 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
  SEINET4206983  Cryptantha clevelandii var. dissita D. W. McNeal 1982-5-2 2632 Colusa On a rd. bank above Hwy. #20 at the Lake-Colus Co. line.; 0 Comment
  CDA11398  Cryptantha dissita G. F. Hrusa, K. van Katwyk 1995-4-22 12118 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  OBI20714  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  JEPS80196  Cryptantha flaccida L. R. Heckard and J. Hickman 1980-7-3 5350 Colusa ca 10 mi w Stonyford (just w of Summit Springs sw Snow Mt.); Snow Mt. 1548 Comment
  JEPS81272  Cryptantha flaccida L. R. Heckard and J. C. Hickman 1982-7-5 5882 Colusa s of (slope below area) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UCR206891  Cryptantha flaccida George K. Helmkamp, E. A. Helmkamp 2009-3-11 14362 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCR44920  Cryptantha hendersonii 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
  JEPS89019  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa County line, on road to Williams Comment
  UC1731393  Cryptantha hispidula Dean W. Taylor 1998-6-23 16704 Colusa Walker Ridge North Coast Ranges (along access road) 929 Comment
  SEINET7883435 Image available Cryptantha hispidula Leo Koch 1940-1 936 a Colusa Serpentine hill near Lake and Colusa county line along Highway 20, Williams Highway Comment
  CDA15300  Cryptantha intermedia G. F. Hrusa 1993-5-2 10865 Colusa North Coast Ranges; Frenzel Creek Research Natural Area-Mendocino Natl. Forest. Mouth of Frenzel Creek at confluence with Little Stony Creek. Comment
  CHSC146  Cryptantha intermedia V. Holt 1935-5-17 Colusa Stonyford. Comment
  UC1177887  Cryptantha intermedia Peter M. Ray 1950-4-16 1716 Colusa jct of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  UC763053  Cryptantha intermedia R. F. Hoover 1941-5-2 4984 Colusa on Williams to Clear Lake highway (just e of Lake Co. line) 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
  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
  UC1177888  Cryptantha intermedia Peter M. Ray 1950-4-15 1713 Colusa road 3 mi e Stony Creek Bridge (s side of canyon of Big Stony Creek); Big Stony Creek Comment
  UCD119838  Cryptantha intermedia Beecher Crampton 1958-5-19 4820 Colusa Little Stony Creek Canyon. Comment
  UCD84446  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6054 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
  UCD84450  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6058 Colusa Walker Ridge. Along Walker Ridge Rd, E side of road in turnout. Just past Pinus attenuata groves. 981 Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  UC763255  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w of Arbuckle; Sand Creek Comment
  UC763256  Cryptantha nemaclada R. F. Hoover 1938-4-24 3229 Colusa ridge between Venado and Leesville Comment
  JEPS80390  Cryptantha simulans L. R. Heckard and J. Hickman 1981-6-22 5623 Colusa Dark Hollow trail Snow Mt. 1935 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
  CHSC91063  Cupressus macnabiana D. Isle 1996-11-26 190 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. 1.1 mi so. of jct. of Lovelady 4x4 Rd. with portion of 24N02, on east side of 24N02, near Kanaka Glade. 1018 Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  CAS-BOT-BC80805  Cupressus sargentii C. Hart Merriam 1907-7-23 s.n. Colusa [Cook] Cooks Springs Comment
  CAS-BOT-BC80806  Cupressus sargentii C. B. Wolf; E. R. Johnson 1934-10-15 6189 Colusa [Cook] Cooks Springs, western part of county 548 Comment
  CHSC44828  Cupressus sargentii David Isle 1978-5-16 Colusa Frenzel Creek Research Area, about 10 mi SW of Stonyford, on Goat Mountain Road. Comment
  CHSC44829  Cupressus sargentii David Isle 1978-5-16 Colusa Frenzel Creek Research Area, about 10 mi SW of Stonyford, on Goat Mountain Road. 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
  UC1585395  Cupressus sargentii R. Raiche 1989-11-1 90339 Colusa W of Williams, NW of Wilbur Springs, Walker Ridge, Freshwate Branch of E Fork Sulphur Creek between Signal Rock and Oak Grove 730 Comment
  CDA35676  Cuscuta approximata CDFA Staff 2011-11-5 PDR# 1552505 Colusa Maxwell. 0 Comment
  UCD37715  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  JEPS80873  Cuscuta californica L. R. Heckard and J. C. Hickman 1980-9-15 5436 Colusa n of road at Summit Springs, Lake-Colusa County boundary Snow Mt., Summit Springs 1524 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
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  UCR152111  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 mi south of College City, just NE of Hershey Railroad siding; Grieve Road (Country Road 88) Comment
  CAS-BOT-BC433233  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  RSA0060513  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  JEPS73505  Cynoglossum occidentale L. R. Heckard 1972-7-10 3122 Colusa near Trout Creek crossing of trail to Box Spring; Snow Mt. 1828 Comment
  CAS-BOT-BC114782  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles N of Colusa between Sacramento River and Butte Creek. Comment
  UCD141000  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. 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
  UC710614  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 mi. w. Williams 30 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
  UCD141020  Cyperus difformis June McCaskill 1954-8-9 362 Colusa ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. Comment
  CAS-BOT-BC114573  Cyperus eragrostis Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-9 419 Colusa On Phillips ranch, near Sycamore. Comment
  RSA0051222  Cyperus eragrostis Richard Carter 2006-7-31 17124 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45. Comment
  UC1100527  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13117 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100528  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13113 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC698542  Cyperus erythrorhizos P. B. Kennedy 1925-9-8 Colusa Cortena Comment
  UC72520  Cyperus erythrorhizos H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD141052  Cyperus erythrorhizos P. B. Kennedy 30-31 May 1922 s.n. Colusa Exact location unknown. 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
  CHSC112619  Cypselea humifusa Lowell Ahart 2013-10-1 19073 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
  JEPS120794  Cypselea humifusa Lowell Ahart 2013-10-1 19073 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
  CAS-BOT-BC445509  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  JEPS32214  Damasonium californicum W. L. Jepson 1934-5-3 16596 Colusa College City Comment
  UC1100151  Damasonium californicum Herbert L. Mason 1946-8-6 12959 Colusa 4 mi. s. Colusa (pond on Colusa-Marysville Hwy., w. side Sacramento R.) Comment
  CAS-BOT-BC445506  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
  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
  CAS-BOT-BC445510  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Colusa (4 mi. west). 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
  UCD38842  Damasonium californicum Beecher Crampton 1958-6-27 4984 Colusa Colusa County; five miles south of Colusa. 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
  UCD126517  Datura ferox T. G. Willis 1925-9-24 Colusa Colusa. Comment
  CHSC112274  Daucus pusillus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD63774  Daucus pusillus Craig D. Thomsen 2008-5-23 2754 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. 420 Comment
  UCD148567  Delphinium G. Ledyard Stebbins 1985-5-19 C 526 Colusa Colusa - Lake County border: Southeast of Goat Mountain peak. Pacific Point along Goat Rock Ridge and above Green Flat Camp Ground. (Exact location unknown; coordinates estimated by label maker.) 1524 Comment
  UCR254940  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodoga 370 Comment
  JEPS80112  Delphinium antoninum L. R. Heckard with J. Hickman 1980-7-1 5271 Colusa cirque between West Peak and East Peak ((ca 10 mi w of Stonyford)); Snow Mt. 1950 Comment
  UCD163887  Delphinium hesperium Craig D. Thomsen 2002-4-12 2439 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  HSC47510  Delphinium hesperium Sheila Logan 1978-4-21 52 Colusa N of Bear Valley Rd. Comment
  UCD95852  Delphinium hesperium June McCaskill 1962-5-2 652 Colusa On road along Bear Creek from State Highway 20 north to Leesville, 7 miles north of Wilbur Springs turnoff. Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC86969  Delphinium hesperium subsp. pallescens B. Castro 2003-5-14 1434 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. 158 Comment
  HSC97314  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley Comment
  UC1181387  Delphinium hesperium subsp. pallescens R. L. Taylor, H. G. Baker and L. Constance 1960-5-29 4421 Colusa n-facing slope 13 mi w Maxwell (on road to Lodega) Comment
  UC1777719  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley 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
  HSC41862  Delphinium nudicaule K. Irwin 1977-4-24 302 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD63107  Delphinium patens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4938 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. 344 Comment
  UC1585383  Delphinium uliginosum R. Raiche 1989-6-20 90163 Colusa near Eaton Spring (w of Williams, n of Wilbur Springs); Walker Ridge, Deadshot Flat 710 Comment
  CHSC46049  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
  SFV1292  Delphinium variegatum B. J. McCaskill 1962-5-2 651 Colusa On road along Bear Creek from State Highway 20 north to Leesville. 3.6 miles north of Wilbur Springs turnoff. About 200 yards west of road. Comment
  RSA158040  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Colusa County: road along Beaar Creek from Hwy 20 N to Leesville, 3.6 miles N of Wilbur Springs turnoff Comment
  SEINET12090857  Delphinium variegatum Unknown 1962-1 651 Colusa ca 200 yards W of road, on road along Bear Creek from State highway 20 north to Leesville, 3.6 mi N Comment
  UCD14295  Delphinium variegatum R. Schulhof 1984-4-21 10 Colusa Colusa Co.; 9.8 miles north of Highway 20 on the east side Bear Valley Road; 381 Comment
  UCD14296  Delphinium variegatum G. Robinson 1984-4-21 13 Colusa Colusa Co.; Bear Valley; east of Wilbur Springs Road, 5.9 miles north of Highway 20, ca. 90 meters from road; 405 Comment
  UCD23391  Delphinium variegatum Robert E. Rolley 1977-5-8 23 Colusa Erect perennial herb, 10-30 cm tall, roots shallow and woody, leaves mostly basal, some are red edged. Leaves and stems covered by many short hairs. Flowers deep purple, upper petal white edged, spurred. Valley grassland. Dry, sunny, flat field. 9.5 miles north on Bear Valley Road from Highway 20. Comment
  CHSC1465  Delphinium variegatum subsp. variegatum 1946-4-18 Colusa Cache Creek. Comment
  UCD14329  Delphinium variegatum subsp. variegatum Kathi A. Zurakowski 1984-4-21 Colusa Colusa Co.; Bear Valley, 9.2 miles north of Wilbur Springs turnoff, on the east side of the road 381 Comment
  SEINET3927152  Deschampsia cespitosa Fred W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys, western.; 0 Comment
  JEPS75435  Deschampsia danthonioides W. L. Jepson 1934-5-3 16601 Colusa Stegeman sta. n. of Colusa Comment
  JEPS80182  Deschampsia danthonioides L. R. Heckard with J. Hickman 1980-7-3 5334 Colusa ca. 10 mi. w. Stonyford (just w. of Summit Springs, s.w. Snow Mt.); Colusa-Lake Co. Boundary 1548 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
  UCD63907  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection (about 0.3 mile east of Hwy 20 'Vista Point'). 345 Comment
  UCD66526  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2326 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection. 340 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
  CHSC111331  Dicentra chrysantha David Isle; Rhonda Isle 2013-5-19 2040 Colusa 0.1 mi W of Maxwell Grade Summit; burned NW asp. S of Sites Lodoga Road. Alluvial terrace of eph. drainage; Sites Fire Area GPS (NFAD 27) 10S 0546355E 4355688N. 548 Comment
  CHSC79752  Dicentra chrysantha L. P. Janeway; B. Castro 2000-5-1 6686 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 243 Comment
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  JEPS80086  Dicentra uniflora L. R. Heckard with J. Hickman 1979-6-16 5093 Colusa about 0.5 mi s Milk Ranch (nw of Snow Mt. West Peak) 2011 Comment
  UCR233440  Dichelostemma capitatum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17128 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CAS-BOT-BC500074  Dichelostemma capitatum Roxana S. Ferris 1917-4-12 521 Colusa 4 mi east of Williams. Alkali Plains. Comment
  CHSC58244  Dichelostemma capitatum subsp. capitatum Dave Read 1975-4-20 13 Colusa Bear Valley, 8.7 miles north of State Highway 20 on Bear Valley Road. 411 Comment
  HSC83387  Dichelostemma capitatum subsp. capitatum Bob Wych 1975-4-20 18 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. 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
  UCD139269  Dichelostemma volubile K. Esau 1934-5-5 s.n. Colusa Tahoe-Ukiah Highway, west of Williams. Comment
  UCD57620  Dichelostemma volubile Joseph A. E. Stewart; 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. Craig Canyon. South side of unimproved road. 335 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-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
  JEPS110360  Digitaria sanguinalis Lowell Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CAS-BOT-BC152171  Diplacus bolanderi A. A. Heller 1940-6-7 15720 Colusa Slope below the road on the Lodogo-Sites Road near the passing into low ground east of Lodogo Comment
  CHSC86525  Diplacus douglasii B. Castro 2003-3-18 1389 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  CHSC94637  Diplacus layneae Lowell Ahart 2006-6-11 12664 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CAS-BOT-BC153322  Diplacus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge, Mendocino National Forest 609 Comment
  UCD72475  Dipsacus fullonum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3809 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
  CHSC107945  Distichlis spicata B. Castro; L. 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. Large +- alkaline vernal pool/marsh. In south half of the marsh, especially its outer edges, and up into swale to the north. 49 Comment
  CHSC114987  Distichlis spicata Lowell Ahart 2015-5-5 20116 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 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
  SBBG119745  Distichlis spicata L. Ahart 2006-9-26 13353 Colusa N side of Maxwell Rd, between the deep ditch and the Delevan Nat Wildlife Refuge, ca. 3 mi W of Colusa Princeton Rd, ca. 5.5 mi E of Maxwell 24 Comment
  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
  UCD64488  Distichlis spicata var. stricta K. Esau; D. Hartmann 1941-7-17 Colusa West of Williams. Comment
  SEINET10831144  Distichlis spicata var. stricta A. Arthur Heller 1902-5-19 Heller 5569 Colusa Near Colusa. Comment
  UC1613493  Dodecatheon hendersonii Charles M. Belshaw 1937-4-25 2852 Colusa Vicinity of Cook's Spring Devil's Ridge, Inner North Coast Range Comment
  HSC83326  Dodecatheon hendersonii Harold Grams 1975-4-12 10 Colusa Hwy. 16, 12.4 mi. N of Rumsey Comment
  CHSC48008  Downingia elegans Vernon Oswald 1984-7-20 1616 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. 1280 Comment
  CHSC60673  Downingia insignis Vernon H. Oswald 1993-4-14 5264 Colusa N side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  UC1192040  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa 3 mi e Maxwell Comment
  UC625519  Downingia insignis Frank W. Gould 1938-4-23 295 Colusa between Arbuckle and Williams 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
  UCD56935  Draba verna Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3537 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UCD14239  Dudleya cymosa Ed Taub 1974-4-28 109 Colusa Colusa County; off of Bear Valley Road, about 5 miles from Highway 20; 304 Comment
  CHSC94479  Dysphania botrys Lowell Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC197058  Echinochloa crus-galli Milo S. Baker 1944-7-18 10871 Colusa A few mi. W. of Williams along Highway to Lake Co. Comment
  SACT001042  Echinochloa crus-galli Malcolm Nobs, S. Smith 1949-9-9 Colusa Rice fields, 3 miles west of Williams. Comment
  CAS-BOT-BC197273  Echinochloa muricata var. microstachya Malcom A. Nobs; S. Galen Smith 1949-9-9 1874 Colusa 3 miles west of Williams Comment
  CDA186  Echinochloa oryzicola P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. Comment
  UCD61165  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena, site of UC temporary experimental rice station 1923 - 1928. Comment
  UCD61175  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Cortena. Comment
  RSA518796  Echinodorus berteroi Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8879 Colusa NW side of East Park Reservoir near end of East Park Road form Stonyford. 366 Comment
  UC1100137  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-9-5 13118 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) 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
  UCD137955  Echinodorus berteroi June McCaskill; W. A. Harvey 1954-8-9 368 Colusa west side of pete Bartnett's house, Tule Road, around 7 miles east of Arbuckle. Comment
  UCD38843  Echinodorus berteroi Beecher Crampton 1958-6-27 4983 Colusa Colusa County; five miles south of Colusa. Comment
  POM312496  Eclipta alba H. L. Mason 1945-9-19 12725 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  HSC60471  Ehrendorferia chrysantha J. P. Smith 1977-4-24 9038 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  SEINET893014  Elatine ambigua June McCaskill 1954-1 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line Comment
  UCD66936  Elatine rubella Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5085 -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. Dunsfield Flat stock pond. 628 Comment
  UCD49591  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-9-9 1878 Colusa Rice fields 3 miles W of Williams. Comment
  UCD49598  Eleocharis engelmannii John M. Tucker 1953-8-28 2676 Colusa In rice field; 7 miles east of Arbuckle, Colusa County, California. Comment
  CAS-BOT-BC112783  Eleocharis macrostachya Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 453 Colusa Colusa-Williams Road, The Trough. Comment
  CHSC79049  Eleocharis macrostachya J. Marr; C. Warren, H. West 1998-7-1 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek, in vernal pool in narrow valley bottom west of ridge. 106 Comment
  SD225710  Eleocharis macrostachya Carol Witham, Jennifer Buck 2001-4-30 156 Colusa 2 miles south of the town of Clusa alng Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  UCD163346  Eleocharis parishii Craig D. Thomsen 2000-5-11 2352 Colusa Walker Ridge. Buck Flat. 129 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
  UCD62453  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville. 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
  UC1053475  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
  SEINET8731329 Image available Emmenanthe penduliflora Helen K. Sharsmith 1953-1 4406 Colusa Among Adenostoma chaparral, edge of road, Trough Springs Ridge, Mendocino National Forest 610 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
  JEPS75845  Epilobium ciliatum subsp. glandulosum L. R. Heckard 1974-9-10 3912 Colusa seep-stream area on ne slope of peak Snow Mt.. West Peak 2011 Comment
  RSA724966  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  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
  CHSC71440  Epilobium densiflorum Vernon H. Oswald; Lowell Ahart 1998-7-15 9303 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In a meadow. 792 Comment
  CHSC79783  Epilobium foliosum L. P. Janeway; B. Castro 2000-5-4 6705 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD82627  Epilobium foliosum Craig Thomsen; G. Harrington 2009-5-12 2898 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
  CHSC70986  Epilobium minutum Vernon Oswald; Lowell Ahart 1998-5-7 9005 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
  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
  JEPS73520  Epilobium minutum L. R. Heckard 1972-7-10 3138 Colusa between Foutch Camp and Trout Creek crossing; Snow Mt. 1828 Comment
  JEPS94775  Epilobium minutum Vernon Oswald and Lowell Ahart 1998-5-7 9005 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  UC638657  Epilobium minutum Ethel Crum 1938-5-8 2026 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  POM256524  Epilobium minutum E. K. Crum 1938-5-7 2018 Colusa Comanche Hills, Inner North Coast Range, summit of ridge, 4.2 miles north of Rumsey 255 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
  CHSC101430  Epilobium nivium David Isle 1990-6-6 1527 Colusa On Lower Summit Valley Rock Outcrop W of Rd 17N10. 1682 Comment
  UCSB4278  Epilobium torreyi Keator, Glenn 1958-6-17 Colusa Not far from Bartlett Springs in the foothills 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
  UCD70303  Equisetum laevigatum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Serpentine riparian alder forests (Alnus rhombifolia) growing on alluvial sands at Stoney Creek. 420 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
  UCD63437  Eragrostis minor Tom Aldrich 1968-5-28 Colusa College City area. Comment
  JEPS110406  Eragrostis pectinacea var. pectinacea Lowell Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC17609  Eremocarpus setiger J. Burtt Davy May, 1898 4285 Colusa near Princeton Comment
  UCR261635  Eriastrum abramsii Ann Howald 2003-5-29 2344 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.6 miles north of Lodoga, 0.1 mi south of Chisolm Cove Group Campground 385 Comment
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Dec 15 2016
  CHSC111703  Eriastrum brandegeeae David Isle; F. Thomas Griggs 1979-5-23 2063 Colusa Little Stony Creek Watershed. 1/2 mile W of Lodoga Rd/Goat Mtn. Rd junction, off S side Goat Mtn. Rd (off both sides within 6 feet of rd.). 402 Comment
  UCD82570  Eriastrum tracyi Tom Zavortink; Gordon Harrington 2009-5-25 s. n. Colusa East side and downslopte of Walker Ridge Road just NE of Til Jones Spring. 779 Comment
  JEPS123252  Eriastrum tracyi David Gowen 2004-6-23 130 Colusa West of Stonyford near Fouts Springs. Toward the western edge of Davis Flat. Comment
  RSA589927  Ericameria linearifolia Michael A. Vincent, Robert Rhode 1996-3-30 7310 Colusa Along Walker Ridge Road, 11.5 miles S of junction with Brim Road Comment
  SEINET4208167  Ericameria linearifolia Richard R. Halse 2013-3-26 8742 Colusa Along the Leesville-Logoda Road ca. 5.5 miles south of Logoda, or 3.2 miles north of the junction of the Leesville and Bear Valley Roads; Indian Valley.; 0 426 Comment
  UCD131145  Ericameria linearifolia G. F. Hrusa; K. Van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges. 950 Comment
  UCD163349  Ericameria linearifolia Craig D. Thomsen 2000-5-12 2329 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  UCR261620  Ericameria linearifolia Ann Howald 2003-3-25 2285 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, near dam, west of Little Stony Creek 355 Comment
  JEPS75723  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-9 3858 Colusa 0.25 mi se Foutch Camp; Snow Mt. 1828 Comment
  JEPS80811  Erigeron petrophilus var. petrophilus L. R. Heckard and J. C. Hickman 1981-7-31 5784 Colusa e side Snow Mt. (rock promontory called Fouts Springs Overlook); , Fouts Springs Overlook 1798 Comment
  CHSC77302  Erigeron sumatrensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CAS-BOT-BC216003  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony Creek 2.5 miles east of Bonnie View, Inner North Coast Ranges 518 Comment
  CAS-BOT-BC216050  Eriodictyon californicum Roxana Stinchfield 1916-6-17 278 Colusa Cemetery, College City Comment
  SD53208  Eriodictyon californicum D. F. Howe 1962-5-19 3284 Colusa 13 miles west of Williams on # 20 213 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
  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
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  JEPS120713  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Near a small drainage, north of the wash and State Highway 20, just east of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  JEPS57027  Eriogonum dasyanthemum W. L. Jepson 1920-5-23 8962 Colusa grade above Venado Comment
  OBI6297  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  POM279914  Eriogonum dasyanthemum Lyman Benson 1933-6-26 4489 Colusa Abbott mine. 549 Comment
  UC1392809  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa n, Bear Creek Canyon Highway 20 (near Wilbur Springs); Bear Creek Canyon Comment
  UCD41208  Eriogonum dasyanthemum John Snelling 1986-5-17 3 - Colusa 8.2 mi. west of Sites on Sites-Lodoga Road. Comment
  UCD55455  Eriogonum dasyanthemum Ellen Dean; Gordon Harrington 2006-10-6 3279 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
  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
  UCD66538  Eriogonum dasyanthemum Craig D. Thomsen 2001-5-24 2498 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
  UCR212378  Eriogonum dasyanthemum Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4677 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek 513 Comment
  UCR228281  Eriogonum dasyanthemum Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4952 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 20 402 Comment
  UCR261730  Eriogonum dasyanthemum Ann Howald 2003-5-29 2353 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  UCR44922  Eriogonum dasyanthemum 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-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
  OBI47577  Eriogonum dasyanthemum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi W of Mendocino NF boundary on Stony Crk rd 671 Comment
  RSA0115043  Eriogonum dasyanthemum Lyman Benson 1948-7-16 12922 Colusa Road between Williams and Clear Lake just east of Lake Co. line. Mt. Range: Inner North Coast. 548 Comment
  RSA279686  Eriogonum dasyanthemum James L. Reveal 1975-7-27 3902 Colusa Along the Leesville Road west of Williams, on a steep road grade about 3.2 miles southeast of Leesville, and about 1 mile below the summit of the grade 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-BC250371  Eriogonum gracile Roxana Stinchfield 1916-6-18 307 Colusa Near College City Comment
  RSA96804  Eriogonum luteolum Percy C. Everett, E. K. Balls 1954-10-17 20336 Colusa West slope Goat Mt., 0.9 mile SW from Linger Longer campsite; road from Stonyford to Upper Lake 1829 Comment
  JEPS73500  Eriogonum luteolum var. luteolum L. R. Heckard 1972-7-10 3118 Colusa trail to Box Springs near Trout Creek crossing; Snow Mt., Trout Creek 1828 Comment
  UCR88380  Eriogonum luteolum var. luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 Comment
  CAS-BOT-BC270977  Eriogonum nervulosum Roger Raiche 1985-7-27 50667 Colusa W of Lodoga, Goat Mt. Rd. area, headwaters of Frenzel Creek 707 Comment
  UCD73924  Eriogonum nervulosum G. Ledyard Stebbins 1966-6-6 6433 Colusa Lovelady Ridge. Comment
  UCR88379  Eriogonum nudum var. nudum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 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
  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
  CHSC32225  Eriogonum strictum var. greenei James Jokerst 1980-8-20 1099 Colusa North Coast Ranges. Near Solomon Peak. Comment
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Aug 20 2014
  SBBG83902  Eriogonum tripodum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  JEPS75864  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1974-9-10 3884 Colusa base of rocky cliff along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  SBBG83236  Eriophyllum lanatum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  UCR44912  Eriophyllum lanatum L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Rd, 2.2 mi. west of Mendocino National Forest boundary, NE of Clear Lake 678 Comment
  CAS-BOT-BC308097  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville 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
  HSC66004  Eriophyllum lanatum var. achilleoides Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 39 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground 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
  RSA273361  Eriophyllum lanatum var. achilleoides J. P. Smith, Tom Nelson 1976-4-14 8578 Colusa Mendocino National Forest, confluence of Stony Creek and North Fork of Stony Creek 427 Comment
  SD53217  Eriophyllum lanatum var. achilleoides Darley F. Howe 1962-5-19 3283 Colusa 20 miles west of Williams 395 Comment
  UC1484434  Eriophyllum lanatum var. achilleoides Dale E. Johnson with J. E. Eckenwalder 1974-6-2 128 Colusa On ridge connecting East and West peaks of Snow Mt. 1999 Comment
  UC896387  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa 3 mi w of Leesville (on open gravelly slopes); Coast Range Comment
  UCD67054  Eriophyllum lanatum var. achilleoides Craig D. Thomsen 2008-5-31 2760 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. Along Hwy 16, ca. 1 mile south of Hwy 20. Near Cowboy Camp. 0.25 mile west of Bear Creek and public viewing area. 305 Comment
  CAS-BOT-BC308096  Eriophyllum lanatum var. achilleoides Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley along road to Bartlett Springs Comment
  CAS-BOT-BC301383  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1926-4-23 6411 Colusa On grade beyond Mountain House on Williams--Stonyford Road Comment
  SEINET11850784  Eriophyllum staechadifolium C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  UCD66935  Erodium brachycarpum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5085 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. 628 Comment
  UCD82123  Erodium cicutarium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5651 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
  RSA669478  Erodium moschatum R. R. Halse 2001-3-22 5943 Colusa Williams, along vacant lot by 455-4th street. 18 Comment
  CAS-BOT-BC211070  Eryngium Roxana Stinchfield 1916-7-9 404 Colusa Along Sacramento River near Sycamore Comment
  UCD82579  Eryngium aristulatum Craig Thomsen 2008-6-12 2769 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
  UCD58163  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch. Just west of the Hwy 20-Hwy 16 intersection, about 300 feet uphill to the west of the corral. 326 Comment
  CDA24852  Erysimum capitatum G. D. Barbe, T. C. Fuller 1986-3-6 4260 Colusa Leesville Grade west of Williams. 0 Comment
  UCD163847  Erysimum capitatum Craig D. Thomsen 2000-5-30 2273 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  RSA590193  Erysimum capitatum var. capitatum Michael A. Vincent, Robert M. Rhode 1996-3-30 7287 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  CHSC94447  Erythranthe cardinalis Lowell Ahart 2006-8-9 13157 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 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
  UCR206723  Eschscholzia George K. Helmkamp, E. A. Helmkamp 2009-3-17 14393 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
  HSC45679  Eschscholzia caespitosa Catherine Chin 1978-4-22 26 Colusa Bear Valley Rd., 1.5 miles from its junction with State Rte. 20 412 Comment
  RSA794942  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17124 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UCD63022  Eschscholzia caespitosa Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4674 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 west of Cowboy Camp on the west side of Bear Creek. 451 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
  CAS-BOT-BC402976  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC402977  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC402979  Eschscholzia californica Roxana S. Ferris 1926-4-21 6271 Colusa 2 miles west of Sycamore Comment
  SD8240  Eschscholzia californica Brandegee Apr 1889 Colusa Comment
  UCR206870  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
  CHSC78673  Eucalyptus tereticornis L. P. Janeway; B. Castro 2000-5-3 6701 Colusa Sacramento Valley. Along Hwy 99W 0.2 km north of Wadleigh Road; about 3.2 km north of Maxwell. 25 Comment
  CHSC115331  Euphorbia crenulata Lowell Ahart 2015-4-10 20011 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. 500 Comment
  CHSC70978  Euphorbia crenulata Vernon Oswald; Lowell Ahart 1998-5-7 8994 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. Roadside bank. 487 Comment
  UCD163848  Euphorbia crenulata Craig D. Thomsen 2000-5-30 2275 b Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD55467  Euphorbia serpillifolia Ellen Dean; Gordon Harrington 2006-10-6 3292 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
  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
  CHSC70979  Euphorbia spathulata Vernon Oswald; Lowell Ahart 1998-5-7 9002 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
  SEINET4673877  Euphorbia spathulata Richard R. Halse 2013-3-27 8760 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.; 0 558 Comment
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  UCD58096  Euphorbia spathulata Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3473 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 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
  UCD81895  Extriplex joaquinana Ellen Dean; Bob Schneider 2009-6-19 5779 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Ridges opposite Cowboy Camp parking area on W side of Bear Creek. 394 Comment
  UCD82573  Extriplex joaquinana Craig Thomsen 2008-6-12 2764 Colusa Walker Ridge, near Elgin Mine on Lucientes property. 655 Comment
  CHSC112250  Festuca microstachys var. ciliata Lowell Ahart 2013-5-1 18696 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
  JEPS80395  Festuca rubra L. R. Heckard and J. Hickman 1981-6-22 5628 Colusa s of Dark Hollow Trail; Snow Mt. 1981 Comment
  UCR227906  Forestiera pubescens Ellen Dean, J. Alderson, N. Voegtly, Craig D. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the Southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 253 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
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville Comment
  UCD146604  Frangula californica subsp. crassifolia G. F. Hrusa 1998-6-19 14599 Colusa North Coast Ranges. Along Little Stony Creek. Goat Mountain Road, around 1 km west of intersection with Lodoga-Stonyford Road. 415 Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  CAS-BOT-BC62920  Frangula californica subsp. tomentella C. Hart Merriam 1907-7-23 s.n. Colusa Cook Spgs. Comment
  UCD163874  Frangula californica subsp. tomentella Craig D. Thomsen 2000-5-11 2395 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  CHSC88540  Frankenia salina B. Castro; Aric Lester 2003-8-20 1442 Colusa Vicinity of Sites, Antelope Valley, and Funks Creek. In mud flats at north end and along E edge of lake. 94 Comment
  UCD163233  Fraxinus dipetala Craig D. Thomsen 2000-4-12 2156 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
  UCD70234  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  SEINET5735298 Image available Fraxinus dipetala Dorothy E. Schmidt 1960-1 20 Colusa North side of road, Hwy 20, north side of Capay.; Capay Comment
  CAS-BOT-BC383131  Fraxinus latifolia Andrew Townesmith; Karen M. Meyer 2007-8-7 911 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from intersection with Forest Service route M10 1371 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
  JEPS15265  Fritillaria affinis Rimo Bacigalupi 1950-4-16 3102 Colusa above and n of Red Bridge Camp (between and above the confluence of the North and Middle Forks of Stony Creek, very close to Glenn County Line, easternmostr ridges of the Inner); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  UCD58106  Fritillaria affinis Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3353 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
  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
  UCD139660  Fritillaria agrestis S. W. Winter 1927-3-9 751 Colusa Arbuckle. 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
  CAS-BOT-BC130435  Fritillaria pluriflora Robert F. Hoover 1939-3-5 3901 Colusa Two miles south of Stonyford Comment
  CHSC52363  Fritillaria pluriflora Henricus C. Jansen 1980-3-1 Colusa Along both sides of Lodoga-Leesville, 0.8 mi S of intersection with Stony(?) Sites Rd. 371 Comment
  CHSC78108  Fritillaria pluriflora Dwayne Thomas 1999-4-3 22 Colusa Bear Valley Rd. 326 Comment
  JEPS89227  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  UCD163302  Fritillaria pluriflora Craig D. Thomsen 1997-4-7 1893 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCR261613  Fritillaria pluriflora Ann Howald 2003-3-12 2279 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2 miles southeast of Stonyford 379 Comment
  UCSB24339  Fritillaria pluriflora Roderick, Wayne 1966-3-26 Colusa Bear Valley, beside Bartlett Springs Road, 1/2 mile east of Robbers Flat Comment
  SDSU20636  Fritillaria recurva Sean Ryan, Michael G. Simpson 2010-6-21 56 Colusa NW facing slope on north side of Forest Road 16N02. Approximately 0.23 miles NE of intersection with Forest Road 16N03. SW of Black Oak Campground, NNW of Goat Mountain. Mendocino National Forest. 1692 Comment
  UCD66537  Galium andrewsii Craig D. Thomsen 2001-5-24 2496 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
  CHSC112317  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-5-1 18694 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS52810  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4357 Colusa 2.7 mi by road ne Lodoga (s-facing roadbank) 396 Comment
  UC71638  Galium aparine Miss Alice King 1905-1 Colusa College City Comment
  UCD58095  Galium aparine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3472 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 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
  CDA14919  Galium bolanderi G. F. Hrusa 1993-5-2 10860 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Mid-canyon of Frenzel Creek. Comment
  OBI78460  Galium bolanderi Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1335 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  RSA170254  Galium nuttallii subsp. nuttallii J. T. Gregory 1936-3-29 1068 Colusa Climbing over oaks, SE side Cobb Mt. near top on road from Middletown 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
  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
  UCD82120  Galium parisiense Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5648 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
  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
  SEINET11117450  Galium parisiense Unknown 1959-1 s.n. Colusa At Mill Creek crossing on road leading out of Red Bridge Camp, Colusa County. 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
  CHSC79811  Galium porrigens var. tenue B. Castro; L. P. Janeway 2000-5-4 1128 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  POM96840  Galium tricornutum E. Johnson 1926-5-5 s.n. Colusa [Unspecified] Comment
  CDA12373  Garrya congdonii G. F. Hrusa 1996-1-2 12626 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  CDA12797  Garrya congdonii G. F. Hrusa 1996-2-26 12632 Colusa Serpentine Flora of California; above Little Stony Creek, on Goat Mtn.Rd. approx. 2.5 miles SE of Stonyford-Lodoga Rd. Comment
  HSC71307  Garrya congdonii Thomas W. Nelson, Jane P. Nelson 1979-4-12 4619 Colusa Along Stony Creek below Digger Pine Campground Comment
  SDSU7189  Garrya congdonii D. F. Howe 1962-5-19 3280 Colusa 20 miles west of Williams on #20. Comment
  UCD121087  Garrya congdonii Frederic Hrusa 1989-2-7 5806 Colusa 2 miles off Stonyford-Lodoga Rd. up road to Cedar Mtn. Comment
  UCD67065  Gastridium ventricosum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 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. 637 Comment
  CDA5308  Gaura neomexicana Kingwill Jun 1944 Colusa 0 Comment
  UCD164160  Geranium dissectum Craig Thomsen 2000-4-28 2268 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD57289  Geranium molle Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3660 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 322 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
  CHSC112231  Gilia capitata subsp. capitata Lowell Ahart 2013-5-1 18663 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
  JEPS108813  Gilia capitata subsp. capitata Lowell Ahart 2006-6-11 12676 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
  JEPS121000  Gilia capitata subsp. capitata Lowell Ahart 2013-5-1 18663 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  CHSC87237  Gilia clivorum B. Castro; Beth Hendrickson 2003-3-24 1399 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 310 Comment
  UC73637  Gilia clivorum Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  CHSC27514  Gilia tricolor Michael F. Henetz 1978-4-15 10 Colusa Field ca. 150 m s of Hwy. 20, ca. .5 km w of junction of Hwy. 20 and Hwy. 16, ca. 29 km s of Williams 322 Comment
  POM282251  Gilia tricolor Lyman Benson 1929-3-26 1043 Colusa Wilbur Springs Comment
  RSA293157  Gilia tricolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9563 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  RSA469705  Gilia tricolor Michelle Stevens 1979-4-14 18 Colusa Buck Flat on Walker Ridge Road. 884 Comment
  UCD64267  Gilia tricolor Craig D. Thomsen 2000-3-31 2065 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
  UCD82484  Gilia tricolor Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5671 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
  SEINET5732133 Image available Gilia tricolor Mary Jane York 1969-1 12 Colusa In an open valley, soil dry, Bear Valley, 9.5 miles north of State Highway 20.; Bear Valley Comment
  JEPS121110  Gilia tricolor subsp. diffusa Lowell Ahart 2013-5-1 18684 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC59999  Gilia tricolor subsp. tricolor Carole Pauls 1975-4-20 1 Colusa Pasture. Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  UC1051502  Githopsis diffusa subsp. robusta Helen K. Sharsmith 1953-6-19 4283 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  UC71621  Githopsis specularioides Miss Alice King 1905-1 Colusa College City Comment
  CHSC113040  Glinus lotoides Lowell Ahart 2013-10-1 19074 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
  JEPS104408  Glinus lotoides Lowell Ahart 2003-10-23 10668 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
  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
  JEPS75039  Glyceria elata L. R. Heckard 1972-7-10 3110 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Spring, Snow Mt.) 1828 Comment
  UCR227904  Gnaphalium palustre Ellen Dean 2008-6-8 5064 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  POM53847  Grindelia camporum Roxana Stinchfield 1916-7-11 455 Colusa Willaims Road at the 'Trough' Comment
  RSA724829  Grindelia camporum L. Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CAS-BOT-BC305302  Grindelia hirsutula Roxana S. Ferris 1926-4-23 6397 Colusa Williams Comment
  JEPS113894  Grindelia hirsutula L. P. Janeway 2007-6-17 9058 Colusa Inner North Coast Ranges; Along Bartlett Springs Road between Bear Valley and Walker Ridge Road. 530 Comment
  UC71784  Grindelia hirsutula H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC765013  Guillenia flavescens R. F. Hoover 1938-4-24 3222 Colusa Venado Comment
  UC71636  Guillenia lasiophylla Miss Alice King 1905-1 Colusa College City 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
  UCD86148  Hainardia cylindrica Beecher Crampton 1958-5-19 4825 Colusa Colusa County, 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCD135766  Harmonia hallii Bruce G. Baldwin 1986-4-13 599 Colusa 2.6 miles west of junction with Bear Valley Road along Bartlett Springs Road. Comment
  CDA34807  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Road, ~8.3 km N of jct. with Hwy. 20, ~1 km N of jct with Indian Valley Reservoir Rd., at road cut, both sides and adjacent slopes. Comment
  JEPS83144  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  CAS-BOT-BC309382  Helenium puberulum Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCD64431  Helianthus annuus Craig D. Thomsen 2000-6-23 2428 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
  JEPS30444  Helianthus bolanderi Peter H. Raven and R. Snow 1959-9-11 14424 Colusa about 2 mi se Happy Camp 762 Comment
  UC71768  Helianthus bolanderi H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC924977  Helianthus bolanderi Annetta Carter 1951-8-26 3079 Colusa Southwest of Leesville (hills at the w side of Bear Valley); North Coast Ranges, Bear Valley 450 Comment
  UCD66875  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5078 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thomspon Creek headwaters and loops back to Ridge trail. Large, dammed stock pond, holding water still in middle of meadow. Comment
  POM64436  Heliotropium curassavicum var. oculatum Roxana Stinchfield 1916-6-17 281 Colusa Near Tule College City. Comment
  JEPS104401  Helminthotheca echioides Lowell Ahart 2003-10-23 10661 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  SD133786  Hemizonia congesta subsp. clevelandii L. R. Heckard, J. C. Hickman 1980-9-15 5418 Colusa Slopes west of Summit Springs, Snow Mountain. 1555 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
  UCD160070  Hemizonia congesta subsp. luzulifolia Ellen Dean; Craig Thomsen and Davis Botanical Society 2015-4-25 8629 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Lynch Canyon near 'Bullfrog Pond. 384 Comment
  UCD61448  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3893 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. 368 Comment
  CHSC79092  Hesperevax caulescens B. Castro; C. Warren 2000-4-3 1045 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 164 Comment
  UCD57051  Hesperevax sparsiflora var. sparsiflora Gordon Harrington; Diana Hickson 2007-4-7 0012 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  UCSC010368  Hesperocyparis macnabiana Dylan M. Neubauer, Tim Forsell 2016-3-30 592 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 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
  UC1212442  Hesperolinon californicum Herbert L. Mason 1946-5-31 12815 Colusa 1 mi e Lake County line (Bartlett Springs to Williams road, western Colusa County); Inner North Coast Ranges Comment
  UCD61439  Hesperolinon californicum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3884 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 1/4 mile NW of parking lot in hills to the west of Bear Creek. 356 Comment
  UCD63908  Hesperolinon californicum Craig D. Thomsen 2000-6-23 2382 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 (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  CAS-BOT-BC175983  Hesperolinon californicum T. S. Brandegee 1884-6-1 s.n. Colusa Unspecified Comment
  CHSC106245  Hesperolinon disjunctum B. Castro; L. P. Janeway 2001-6-3 1258 A 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. 883 Comment
  CHSC112217  Hesperolinon disjunctum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18635 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
  CHSC88554  Hesperolinon disjunctum L. P. Janeway 2001-6-6 7128 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  CHSC94727  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UC1212497  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4031 Colusa near Mill Creek at junction with road to Black Diamond Ridge; Inner North Coast Ranges, Mendocino National Forest, Fouts S 457 Comment
  UC1212498  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4033 Colusa on Bartlett Springs road 4.4 mi from Leesville (western margin of county); Inner North Coast Ranges 609 Comment
  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
  UCD67057  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2752 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  CAS-BOT-BC176221  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
  OBI12541  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa Inner North Coast Ranges. North cyn slope overlooking Cook springs 549 Comment
  RSA151706  Hesperolinon drymarioides H. K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs 549 Comment
  UCD82742  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2923 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  RSA0089768  Heteranthera dubia Dean Wm. 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. 35 Comment
  SBBG115923  Heteranthera dubia R. Yeo -Oct-1976 Colusa 3 mi N of Williams, Glenn-Colusa Canal irrigation district Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  UCD72451  Heteromeles arbutifolia Ellen Dean; Gordon Harrington 2006-11-10 3312 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch, along ridge trail above Cache Creek. 535 Comment
  JEPS15028  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  JEPS73513  Hieracium greenei L. R. Heckard 1972-7-10 3131 Colusa overlooking and 3 mi w of Fouts Springs (woods near promontory on se corner of mountain); 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
  UCD164149  Hoita macrostachya Craig Thomsen 1997-6-21 1930 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  LA207941  Holodiscus discolor A. A. Heller; 1916-6-6 12362 Colusa Coast Range on the grade about 3 mi. W. of Leesville Comment
  POM163516  Hordeum Roxana S. Ferris 1926-4-22 6300 Colusa 2 miles west of Colusa Comment
  SEINET10598961  Hordeum californicum Roxana S. Ferris 1917-1 Ferris 518 Colusa 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
  JEPS118652  Hordeum marinum subsp. gussoneanum L. P. Janeway, B. Castro 2011-4-27 10243 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. Comment
  CHSC83698  Hordeum murinum subsp. leporinum L. P. Janeway 2002-4-24 7521 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  JEPS93802  Horkelia californica var. elata Vernon H. Oswald and Lowell Ahart 1998-7-15 9270 Colusa Bartlett Springs Road 1.6 mi west of Bear Valley Road 487 Comment
  CHSC62925  Hornungia procumbens Vernon H. Oswald; Lowell Ahart 1994-4-6 6075 Colusa Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford. Along a drainage. 548 Comment
  JEPS80445  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1980-9-15 5422 A Colusa w. of Summit Springs (Snow Mt.); Snow Mt. 1554 Comment
  HSC48199  Hypochaeris glabra Thomas W. Nelson, Jane P. Nelson 1978-4-29 3957 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD57109  Hypochaeris glabra Gordon Harrington; Diana Hickson 2007-4-7 0022 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/5 to 1/2 mile W of Roadkill Cafe on old fuel break. 442 Comment
  JEPS81320  Iris fernaldii L. R. Heckard and J. C. Hickman 1982-7-6 5936 Colusa wilderness area above Summit Springs (s side of Snow Mt, near entrance and parking to Snow Mt); Snow Mt. 1584 Comment
  CDA15768  Iris macrosiphon G. F. Hrusa 1993-5-2 10853 Colusa North Coast Ranges; Frenzel Creek Research Natural Area - Mendocino National Forest. Lower Frenzel Creek, tributary of Little Stony Creek. 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
  JEPS80126  Iris tenuissima L. R. Heckard with J. Hickman 1980-7-1 5285 Colusa 10 mi w Stonyford (Summit Springs to Frog Lake, Snow Mt., Colusa-Lake County boundary); Snow Mt. 1706 Comment
  UCD163714  Iva axillaris Craig Thomsen 1999-5-10 2007 Colusa Colusa County. In canyon between Wilbur Springs Bridge and Bear Valley. About 4 miles north of Hwy 20. Comment
  UCD58172  Iva axillaris Gordon Harrington 2007-5-31 62 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  UCD82635  Juglans hindsii Jack Alderson 2009-9-19 31 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Along Bear Creek, SE of mouth of Craig Canyon. 304 Comment
  CHSC86837  Juncus balticus 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
  JEPS80251  Juncus balticus L. R. Heckard, and J. Hickman 1980-9-15 5430 Colusa below Summit Springs (Lake-Colusa County boundary); Snow Mt. 1524 Comment
  UCD55449  Juncus balticus Ellen Dean; Gordon Harrington 2006-10-6 3274 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
  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
  HSC62947  Juncus balticus subsp. ater Marla J. Carollo 1979-4-14 32 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  CHSC101403  Juncus bufonius var. congestus David Isle 2006-5-6 1571 Colusa East of Maxwell abt 1 mile; S of Maxwell Rd and e of Lyons Rd in north Dirk's organic rice field (check). 30 Comment
  CHSC71509  Juncus bufonius var. congestus Vernon H. Oswald; Lowell Ahart 1998-7-15 9305 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In meadow. 792 Comment
  JEPS81343  Juncus hemiendytus L. R. Heckard and J. C. Hickman 1982-7-7 5956 Colusa s of (above) Milk Ranch; Snow Mt. 1950 Comment
  JEPS73444  Juncus howellii L. R. Heckard 1972-7-8 3039 Colusa ridge running se of Snow Mt., West Peak 2011 Comment
  UCD61460  Juncus mexicanus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3906 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
  CDA39268  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. Comment
  CHSC118863  Juncus phaeocephalus var. paniculatus David Isle; Rhonda Isle 2017-6-5 2176 Colusa Foothills E edge of N Coast Range: W of Stoneyford ~1.5 miles on 18N01.1 ro Frank and Sheri 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
  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
  UCD163648  Juncus xiphioides Craig Thomsen 1998-6-19 1944 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  CHSC79433  Juniperus californica B. Castro; L. P. Janeway 2000-5-1 1102 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  JEPS48304  Juniperus californica W. L. Jepson 1932-5-8 16298 Colusa n of Stonyford (w Colusa Co.) 365 Comment
  HSC97013  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa S side of Stony Creek, at Mine Camp, about 3.5 mi. W of Stonyford. 422 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
  CHSC111213  Keckiella lemmonii David Isle 1990-7-11 2056 Colusa W of Fouts Springs; ~1mi below (E of) Sanborn Cabin Rd 17N63 Jct w/ 18N01 on edge 18N01; Adjacent Mixed Confer-Hardwood Forest. 877 Comment
  JEPS110095  Kickxia elatine Lowell Ahart 2006-8-9 13134 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  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
  JEPS80852  Lactuca saligna L. R. Heckard and J. Hickman 1980-9-15 5432 A Colusa n of Summit Springs (n side of road; Lake-Colusa County boundary); Snow Mt. 1524 Comment
  UCD163223  Lagophylla minor Craig D. Thomsen 2000-4-12 2155 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
  UCD57827  Lagophylla minor Gordon Harrington 2007-4-17 36 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. 567 Comment
  CDA8085  Lagophylla minor Vernon H. Oswald & Lowell Ahart 1998-5-7 8998 Colusa Bartlett Springs Road 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat roads. Comment
  UCD159332  Lagophylla ramosissima D. S. Park 2010-6-5 116 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  CHSC89865  Lagophylla ramosissima subsp. ramosissima B. Castro; L. Janeway 2001-4-12 1229 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Ck in hilly open blue oak woodland. In grassy understory on relatively flat ridgetop. 170 Comment
  UCR206691  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-1-31 14323 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
  UCR238928  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2012-2-9 18533 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  POM288355  Lasthenia californica Lyman Benson 1933-4-16 4329 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  CAS-BOT-BC324484  Lasthenia ferrisiae Alice Eastwood 1921-4-11 10232 Colusa Colusa Comment
  CAS-BOT-BC352922  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa West side of Bear Valley Road, 11 miles (by road) north of junction with State Hwy 20 396 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
  POM163441  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa 3 miles W of Colusa. Comment
  CHSC101593  Lasthenia glabrata subsp. glabrata David W. Isle; Rhonda Isle, Dorothy Lingerfelt 1998-4-19 1661 Colusa Mendocino National Forest; Keegan Ranch, adj. Bear Valley Road. MDB and M. Comment
  SEINET7062981  Lasthenia glabrata subsp. glabrata A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 mile south of Route 20 and near Bear Creek. UTM Zone 10, 555654mE, 4318071mN. (WGS84/NAD83). 320 Comment
  CAS-BOT-BC353439  Lasthenia glabrata subsp. glabrata Ella Dales Cantelow 1936-4-11 1151 Colusa Jct. William Hy, Bear Creek Canyon Comment
  POM288884  Lasthenia glabrata subsp. glabrata Lyman Benson 1933-4-16 4331 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  POM914476  Lasthenia glabrata subsp. glabrata L. S. Rose 1936-4-27 36184 Colusa 15 miles NW of Rumsey. 305 Comment
  UC90010  Lasthenia platycarpha T. S. Brandegee 1889-4-12 Colusa Colusa Junction Comment
  JEPS127615  Lathyrus jepsonii var. californicus B. Castro with Tom Boullion 2008-6-4 1733 Colusa Ca 5 air miles N of Colusa, ca 0.5 mi E of Hwy 45 off N edge of Reservation Road. On upper terrace within levee, overlooking riprap-lined bend in the Sacramento River (River-mile 154.3). Comment
  UCD80896  Lathyrus vestitus Ellen Dean; G. Harrington 2009-3-27 5296 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Along road that connects Lynch Canyon and the Ridge Trail on slope above road. 453 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
  CAS-BOT-BC323887  Layia chrysanthemoides Alice Eastwood 1922-4-24 11191 Colusa Road between Princeton & Norman. 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
  UC762527  Layia chrysanthemoides R. F. Hoover 1938-4-24 3221 Colusa Williams Comment
  UCD163702  Layia chrysanthemoides Craig Thomsen 1999-5-10 2014 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  UCD63010  Layia chrysanthemoides Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4663 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. 319 Comment
  UCR212376  Layia chrysanthemoides Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4663 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
  UCD133958  Layia chrysanthemoides J. M. Tucker; Dorothy Dreyfus 1967-4-29 4035 Colusa at south end of Bear Valley. 6.3 miles north of junction of Bear Valley Road with State Highway 20. 426 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
Read comments
May 24 2013
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  UCR261681  Layia septentrionalis Ann Howald 2003-4-23 2312 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 0.35 mi north of intersection with East Ruby King Road 415 Comment
  CAS-BOT-BC274325  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile above Colusa 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
  UC1100313  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank of Sacramento River, Butte Sink); Sacramento River, Butte Sink 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
  UCD138193  Lemna trisulca C. Richie Bell 1951-6-13 1167 Colusa below Letts Meadow on road from Bear Creek to Foutes Spring. 914 Comment
  CAS-BOT-BC534910  Lemna turionifera Verne Grant; Herbert L. Mason 1946-8-6 12966 Colusa Pond on Colusa-Marysville Highway, four miles south of Colusa, west side Sacramento River Comment
  UCD67066  Lepechinia calycina Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 -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. 554 Comment
  HSC101408  Lepidium chalepense J. P. Smith 2011-4-27 13143 Colusa Along Hwy. 16, 1.3 mi. S of junction with Hwy. 20 315 Comment
  CHSC107952  Lepidium dictyotum var. acutidens B. Castro; T. Boullion 2011-4-20 1834 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 vernally moist flats, vernal pools and large bald patch of bare whitish soil. 49 Comment
  CHSC79711  Lepidium dictyotum var. dictyotum L. P. Janeway; B. Castro 2000-3-23 6635 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CAS-BOT-BC89759  Lepidium latipes Roxana S. Ferris 1917-4-12 532 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC89760  Lepidium latipes Roxana S. Ferris 1917-4-12 502 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC89762  Lepidium latipes M. K. Curran 1885-1-1 s.n. Colusa Williams. Comment
  UC10646  Lepidium latipes J. Burtt Davy May 1898 Colusa near Willows Comment
Read comments
Sep 15 2014
  CAS-BOT-BC89888  Lepidium nitidum Roxana S. Ferris 1917-4-12 719 Colusa 4 miles east of Williams. Comment
  JEPS53702  Lepidium nitidum W. L. Jepson 1920-5-23 8967 Colusa 2-3 mi sw Leesville (foot of Bartlett grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  CHSC79002  Lepidium strictum J. Marr; C. Warren, H. West, N. Wight 1998-6-11 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek. 114 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
  UCD63675  Leptochloa fusca subsp. fascicularis Elizabeth Wilson 1940-1 Colusa Colusa. Comment
  HSC94027  Leptosiphon androsaceus A. Skelly, G. McCabe, B. Bletcher 1996-3-30 3 Colusa .9 mi. N of Walker Springs Rd. and Indian reservoir Rd. jct. on Walker Ridge Rd., 57 mi. E of Hwy. 101 on Hwy. 20 777 Comment
  UCD82365  Leptosiphon androsaceus Robin McMaster 1973-4-15 335 Colusa 1/2 mi towards Bartlett Springs from Bear Valley Road. Comment
  CHSC79790  Leptosiphon bicolor L. P. Janeway; B. Castro 2000-5-1 6688 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 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
  POM310950  Leptosiphon bolanderi H. L. Mason 1941-4-5 12404 Colusa Three miles south of Stonyford 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
  RSA275358  Leptosiphon filipes Thomas W. Nelson, Jane P. Nelson 1978-4-29 3935 Colusa Along Bear Valley Rd. 2.5 miles from junction with State Route 20. 366 Comment
  HSC41863  Leptosiphon latisectus K. Irwin 1977-4-24 301 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  CHSC70992  Leptosiphon parviflorus Vernon Oswald; Lowell Ahart 1998-5-7 9006 .1 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
  UC1613491  Leptosiphon parviflorus Charles M. Belshaw 1937-4-25 2829 Colusa Inner North Coast Range: Cooks Springs, Devils Ridge Comment
  UCD163911  Leptosiphon parviflorus Sara Martin 2016-4-9 4 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. 375 Comment
  UCD57310  Leptosiphon parviflorus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3681 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  CHSC32205  Lesquerella occidentalis subsp. occidentalis James Jokerst 1980-8-7 1067 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UCD163716  Lessingia Craig Thomsen 1999-5-10 2008 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  SD132027  Lessingia nemaclada Barbara Ertter, Neese,Fujii,Espindola 1989-10-21 8868 Colusa Brim Road, southwest of Leesville to Indian Valley Reservoir 609 Comment
  UCD66691  Lessingia nemaclada Craig D. Thomsen 2000-6-23 2372 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
  CHSC88557  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  JEPS94654  Lessingia ramulosa Vernon H. Oswald and Lowell Ahart 1998-7-15 9276 Colusa on Sawtelle Valley Rd. 0.4 mi n Bartlett Springs Rd. (w side of county) 670 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
  UC1552844  Lessingia ramulosa Frederica Bowcutt 1985-6-19 604 Colusa about 2 air mi n Wilbur Hot Springs (just sw of Bear Valley); Bear Valley, Wilbur Hot Springs Comment
  UCD163655  Lessingia ramulosa Craig Thomsen 1998-6-10 1953 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  HSC31308  Lewisia rediviva Carter Schleicher 1974-5-4 25 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS80163  Lewisia triphylla L. R. Heckard with J. Hickman 1980-7-2 5314 A Colusa ca. 10 mi w Stonyford (first meadow n of summit of trail from Frog Pond to Milk Ranch; w of Snow Mt. West) 1950 Comment
  UC1146611  Leymus triticoides Freed W. Hoffman 1944-7-14 1954 Colusa Wilbur Springs North Coast Ranges Comment
  CHSC49659  Lilium pardalinum subsp. pardalinum Vernon Oswald 1986-6-30 2173 Colusa Fouts Springs Rd. (M10) 14.5 mi w of Rd. 306, 0.5 mi ne of jct. Letts Lake Rd, 17N02. 1219 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
  UCD33936  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9167 Colusa Colusa County, 1 mile west of Lodoga. Comment
  UCD143419  Linanthus Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  SEINET8729331 Image available Linanthus bakeri Herbert L. Mason 1941-1 12404 Colusa Three miles south of Stonyford. Comment
  SEINET12326983  Linanthus bicolor E. J. Baker 1984-1 16 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams 143 Comment
  UC106862  Linanthus bolanderi T. S. Brandegee Apr 1889 Colusa Leesville 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
  UC73621  Linanthus ciliatus Miss Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCR198147  Linanthus jepsonii Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3681 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  CDA40096  Linanthus parviflorus Vernon H. Oswald & Lowell Ahart 1998-5-7 9006 .1 Colusa Bartlett Springs Road 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat roads. Comment
  UCD118726  Linanthus pungens G. Ledyard Stebbins Jr. 1964-7-4 6172 Colusa Mt. St. John, west of Stonyford. 1676 Comment
  JEPS80136  Linanthus rattanii L. R. Heckard with J. Hickman 1980-7-2 5296 Colusa just above Summit Spring entrance to Snow Mt. Trail (ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1630 Comment
  JEPS76798  Listera convallarioides Alice Q. Howard 1972-7-10 4 Colusa n side of the ridge separating Trout Creek and Paradise Creek (the highest of two mossy spring areas crossing trail from Fouts Camp to Box Springs); Snow Mountain 1676 Comment
  UCD163884  Lithophragma affine Craig D. Thomsen 2002-4-10 2596 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  HSC72155  Lithophragma parviflorum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9568 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  CHSC79454  Logfia filaginoides B. Castro; L. P. Janeway 2000-5-2 1119 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC1614399  Logfia filaginoides Charles M. Belshaw 1937-4-25 2882 Colusa vicinity of Cook's Spring, Devil's Ridge. Inner N coast range 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
  UCR206393  Lomatium George K. Helmkamp, E. A. Helmkamp 2009-3-11 14374 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  CHSC91217  Lomatium californicum D. Isle 2003-6-4 370 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 0.2 mi. W of M-10/M-5 jct. on N. edge of M-10. 621 Comment
  RSA715880  Lomatium californicum David W. Isle 2003-6-4 370 Colusa Mendocino National Forest, Middle Fork Stony Creek Watershed, W of M-10/M-5 junction on N edge of M-10 622 Comment
  UCD82548  Lomatium californicum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5703 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  RSA63650  Lomatium caruifolium Milo S. Baker 1947-4-6 11646 Colusa Colusa County: 1 mile E of Lake - Colusa boundary along hwy 20, Serpentine area Comment
  CDA38340  Lomatium ciliolatum var. hooveri T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  CHSC91009  Lomatium dasycarpum subsp. tomentosum D. Isle 2002-4-18 289 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Motorcycle info. Center and Fouts Spring Rd., above 18N01.2 jct. w/ OHV trail. 451 Comment
  UCD163350  Lomatium dissectum Craig D. Thomsen 2000-5-12 2332 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  CAS-BOT-BC478201  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner Coast Ranges: Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 miles northwest of intersection with East Ruby King Road 419 Comment
  UC1049547  Lomatium hooveri Rimo Bacigalupi 1950-4-16 3117 Colusa Bartlett Mt. Road, base of grade just W of Bear Valley, near Colusa-Lake County line 426 Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 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
  UCD58105  Lomatium hooveri Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3352 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. 556 Comment
  UCR261643  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 mi northwest of intersection with East Ruby King Rd. 419 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
  SEINET196147  Lomatium marginatum Robert F. Hoover 1941-5-2 4987 Colusa Just east of lake Coutny line on Williams Clear Lake highway Comment
  JEPS16220  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) 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
  SEINET11587934  Lomatium utriculatum Unknown 2009-3-11 14374 Colusa Williams Comment
  UCD56921  Lomatium utriculatum Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3524 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  UCD57818  Lomatium utriculatum Gordon Harrington 2007-4-17 30 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. 527 Comment
  UCD64287  Lomatium utriculatum Craig D. Thomsen 2000-3-31 2119 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
  HSC47643  Lomatium utriculatum J. P. Smith, J. O. Sawyer 1978-4-29 9795 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  SEINET13944681 Image available Lomatium utriculatum F. G. Meyer 1938-1 1361 Colusa low meadows, about 50 miles west of Williams Comment
  RSA0010483  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 miles northwest of Sites. 175 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
  UC1299560  Lonicera involucrata var. ledebourii Freed W. Hoffman 1948-6-27 2493 Colusa 8.6 mi sw Fouts Spring; North Coast Ranges, Upper Letts Valley 1310 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
  CHSC94444  Lotus corniculatus Lowell Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80212  Lotus corniculatus L. R. Heckard and J. Hickman 1980-7-3 5366 Colusa sw slope Snow Mt. (about Summit Springs); , Summit Springs 1554 Comment
  UCD57469  Lotus corniculatus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3682 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. Thompson Canyon, north side of trail adjacent to creek. 362 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
  UC1299188  Lotus crassifolius var. crassifolius Freed W. Hoffman 1948-6-27 2515 Colusa 8.6 mi s Fouts Springs (w Colusa Co.); Upper Letts Valley Comment
  UCR227340  Lotus denticulatus Craig D. Thomsen 2000-6-23 2385 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
  JEPS80208  Lotus denticulatus L. R. Heckard and J. Hickman 1980-7-3 5362 Colusa n of (across road) Summit Springs (sw slope of Snow Mt., Lake-Colusa County boundary); Snow Mt. 1548 Comment
  SEINET7042570  Lotus formosissimus 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
  JEPS101802  Lotus grandiflorus var. grandiflorus Dean W. Taylor 1998-6-23 16705 Colusa Walker Ridge; ; Walker Ridge, along BLM access road 929 Comment
  JEPS83028  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2236 Colusa about 5 mi w Stonyford (along Trough Spring Ridge road 0.5 mi sw of its junction with the Stonyford-Fouts Spring road); Trough Spring Ridge 731 Comment
  UCR138666  Lotus humistratus M. Brooks, Julie Evens, H. Johnson 1997-3-29 8 Colusa Brim Road, 1.6 mi east of Brim Road/ Walker Ridge Road intersection 457 Comment
  UC725836  Lotus purshianus var. purshianus A. A. Heller 1919-6-8 13243 Colusa Ladoga 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
  UCD78332  Ludwigia hexapetala B. J. Grewell 2006-7-11 06- 17 -LU Colusa Delevan National Wildlife Refuge. Managed seasonal pond at SE corner of refuge, north of Maxwell Road, immediately west of Colusa Basin Drain. 17 Comment
  UCD66958  Lupinus adsurgens Ellen Dean; Davis Botanical Society 2008-5-31 5002 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1099 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
  HSC66007  Lupinus albifrons Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 42 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  HSC89790  Lupinus albifrons L. Blackford, S. Branch, D. Malm 1988-4-16 71 Colusa 15.3 mi. off Hwy. 20 on Walker Ridge Rd. 915 Comment
Read comments
Aug 20 2014
  UCD163846  Lupinus albifrons Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82547  Lupinus albifrons Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5702 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  CAS-BOT-BC198400  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 3832 Colusa W. of Williams 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
  CDA15481  Lupinus albifrons var. collinus G. F. Hrusa, WTD 1998-6-19 14618 Colusa North Coast Ranges; Along USFS Pacific Ridge Rd. (M5) above intersection with Goat Mtn. Rd. 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
  JEPS80459  Lupinus albifrons var. collinus Alice Q. Howard 1972-7-10 14 Colusa between Dark Hollow and Paradise Creeks; between Dark Hollow and Paradise Creeks 1402 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
  UCD66966  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5010 Colusa west of I-5 at Maxwell, east slope of Goat Mountian, along Goat Mountain Road, between Cedar grove campground and the summit, near crossing of tributary of Little Stoney Creek. 1309 Comment
  UCR212293  Lupinus albifrons var. collinus Ellen Dean, Davis Botanical Society 2008-5-31 5010 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, between Cedar Grove Campground and the summit, near crossing of tributary of Little Stoney Creek 1309 Comment
  CHSC27856  Lupinus bicolor Phil Blumert 1978-3-28 18 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
  HSC72138  Lupinus bicolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9570 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  JEPS81297  Lupinus bicolor L. R. Heckard with J. C. Hickman 1982-7-5 5911 Colusa below Summit Springs (S side Snow Mt.) Comment
  UCD163686  Lupinus bicolor Craig Thomsen 1999-4-15 1988 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD56899  Lupinus bicolor Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3502 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  CHSC3940  Lupinus densiflorus var. aureus M. Lee 1967-4-29 20 Colusa On N side of Hwy 20 ca. 26 mi. west of Williams. Comment
  HSC45663  Lupinus densiflorus var. aureus Howee Barban 1978-4-22 16 Colusa Bear Valley Rd., 1.5 mi. from its junction with State Route 20 412 Comment
  RSA10439  Lupinus densiflorus var. aureus Carl B. Wolf 1928-5-8 2129 Colusa Sacramento Valley. 2 miles north of Dunnigans. Comment
  SEINET10485227  Lupinus densiflorus var. aureus Clemens 1977-4-16 CLEMENS 17 Colusa Moderate population, salt creek canyon, n side of salt creek, hwy 20, 10 mi w-sw of williams. Wilbur springs quad, t.15n, r.4w, sec.32, 15 ft e central border. Open bank along roadside. 143 Comment
  UC71650  Lupinus formosus var. robustus Miss Alice King 1905-1 Colusa College City Comment
  UCD66957  Lupinus latifolius var. latifolius Ellen Dean; Davis Botanical Society 2008-5-31 5001 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1099 Comment
  JEPS95253  Lupinus luteolus Steve Edwards 1995-8-19 Colusa Bear Valley Road, just S of Bear Valley proper. Also common this year on floor of Bear Valley propers. Bear Valley Comment
  UC1299680  Lupinus luteolus Freed W. Hoffman 1949-9-25 3151 Colusa Bear Valley; North Coast Ranges, Bear Valley Comment
  SD27803  Lupinus menziesii Carl B. Wolf 1928-5-7 2121 Colusa 17 miles east of [Houghs] Springs on the road to Williams 456 Comment
  JEPS65094  Lupinus microcarpus var. densiflorus W. L. Jepson 1932-5-7 16264 Colusa valley above Venado; Venado (valley above) 304 Comment
  UCD163886  Lupinus microcarpus var. densiflorus Craig D. Thomsen 2002-4-26 2600 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. 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
  UCR206292  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14736 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCD64426  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 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD66534  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-6-23 2421 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
  UCD33935  Lupinus nanus Beecher Crampton 1958-4-21 9166 Colusa 1 mile west of Lodoga. Comment
  RSA724143  Lupinus nanus subsp. nanus Richard R. Halse 2002-3-21 6129 Colusa Willaism; by junction of 5th Street and B Street. 24 Comment
  RSA424766  Lupinus nanus var. apricus Aaron Liston, M. Blumler 1987-4-26 667 -9 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  CHSC114063  Lupinus succulentus Richard R. Halse 2013-3-26 8736 Colusa Along the Leesville Road ca 1.8 miles northwest of its junction with State Hwy 20, west of Williams. 85 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  SEINET9325857  Lupinus succulentus Unknown 2009-5-20 14735 Colusa Glasscock Mountain 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
  POM276532  Lupinus succulentus Lyman D. Benson 1935-3-27 6336 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  JEPS80282  Luzula cascadensis L. R. Heckard and J. Hickman 1980-9-16 5457 Colusa Northeast slope West Peak, cirque area between peaks, Snow Mt. 2011 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
  CHSC107980  Lythrum californicum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1883 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Ca 100 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CHSC61752  Lythrum californicum Vernon H. Oswald 1993-9-1 5890 Colusa Sacramento 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. Growing along tules in a ditch along the levee road bordering the N side of Tract 44, S of Cell 1, Pool 12. 22 Comment
  JEPS110112  Lythrum californicum Lowell Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS98324  Lythrum californicum Vernon H. Oswald 2000-9-29 9973 Colusa Colusa National Wildlife Refuge, between the hiking trail and Powell Slough 13 Comment
  RSA0014829  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CDA37495  Lythrum californicum D. Brown 1977-5-31 s.n. Colusa Near Williams. 0 Comment
  RSA0014830  Lythrum californicum H. L. Mason, Verne Grant 1946-8-7 12977 Colusa 8 miles north of Colusa; Butte Sink. Comment
  CHSC86827  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC86838  Lythrum hyssopifolia 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
  UC1191547  Lythrum hyssopifolia Herbert L. Mason, Verne Grant 1946-8-7 12986 Colusa 8 mi n of colusa (Butte Sink); Butte Sink 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
  JEPS107096  Lythrum tribracteatum Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 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
  SD211626  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, et al 1989-10-21 8870 Colusa Southeast end of East Park Reservoir North of Lodoga, narrow strand on shady substrate 366 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
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  CHSC27631  Madia exigua Timothy Spira; Robert Schlising 1978-5-13 3239 Colusa Just E of Lake County line, along Hwy 20. 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
  UCD66866  Madia exigua Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5069 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
  UCD81228  Madia exigua Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5565 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
  UCD57858  Madia gracilis Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 45 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. 412 Comment
  RSA141307  Madia minima J. M. Tucker 1959-5-30 3520 Colusa Ca. 2 miles (by road) below the summit of Goat Mountain (ca. 1.25 miles, airline, north-northwest of Goat Mountain Lookout) 1646 Comment
  RSA0119054  Malacothamnus fremontii David Isle, Frank Elliott 2014-6-11 2134 Colusa Northern Sacramento Foothills: Frank and Judy Elliott Ranch, ~1 mile S of Rail Canyon Rd. Jct. with Sites-Lodoga Rd. and ~1/2 mile S of Sites-Lodoga Rd. SE of Elliott home. (GPS for Rail Canyon Rd. Jct/ Sites-Lodoga Rd.) Comment
  CHSC79469  Malacothrix clevelandii B. Castro; L. P. Janeway 2000-5-2 1116 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 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
  CHSC79470  Malacothrix floccifera B. Castro; L. P. Janeway 2000-5-4 1135 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD63101  Malacothrix floccifera Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4932 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. 348 Comment
  CDA32964  Malvella leprosa Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 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
  UC71659  Marah fabacea Miss Alice King 1905-1 Colusa College City Comment
  UCD57865  Matricaria discoidea Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 48 a Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  CDA34098  Matricaria discoidea P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC94450  Medicago lupulina Lowell Ahart 2006-8-9 13123 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SEINET255529  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  SEINET3287499 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  UCD107927  Medicago sativa Beecher Crampton 1963-8-5 6874 Colusa 3.5 miles south of Grimes. Comment
  CHSC79529  Melia azedarach B. Castro; L. P. Janeway 2000-5-1 1101 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 205 Comment
  CHSC100246  Melica californica D. Isle 1988-4-13 1507 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  UCD64416  Melica californica Craig D. Thomsen 2000-4-12 2162 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
  UCD86457  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  UCR212347  Melica californica Craig D. Thomsen 2000-4-12 2162 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
  JEPS81294  Melica harfordii L. R. Heckard and J. C. Hickman 1982-7-5 5908 Colusa just off creek below Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  CHSC112269  Melica torreyana Lowell Ahart 2013-5-1 18692 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
  UCD63920  Melica torreyana Craig D. Thomsen 2001-5-24 2510 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 (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCD72476  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3810 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
  CHSC94465  Melilotus indicus Lowell Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS108889  Melilotus indicus Lowell Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC94511  Mentha rotundifolia Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104403  Mentha spicata Lowell Ahart 2003-10-23 10666 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  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
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 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
  UCD82738  Mentzelia micrantha Craig Thomsen; G. Harrington 2009-5-14 2919 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. 822 Comment
  CHSC87161  Micranthes californica Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 Comment
  UCD162998  Micropus californicus Craig D. Thomsen 2000-4-28 2183 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
  UCD163688  Micropus californicus Craig Thomsen 1999-4-15 1990 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCR261673  Micropus californicus Ann Howald 2003-3-26 2292 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  JEPS87665  Micropus californicus var. californicus Vernon H. Oswald and Lowell Ahart 1994-4-6 6067 B Colusa s. Stonyford (Goat Mt. Rd. at Sullivan Creek, 1.2 mi. s.w. of Digger Pine Flat); Sullivan Creek 469 Comment
  UCD82822  Micropus californicus var. californicus Craig Thomsen; G. Harrington 2009-5-12 2844 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  RSA424740  Microseris Aaron Liston, M. Blumler 1987-4-26 668 -7 Colusa East Park Reservoir, 3.2 miles E of Stonyford 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
  UC92165  Microseris acuminata Katharine Brandegee April 1889 Colusa Leesville Comment
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Aug 28 2012
  CHSC114968  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Along Bear Valley Road, in Bear Valley, about 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles south of Highway 20. 395 Comment
  JEPS94219  Microseris douglasii subsp. douglasii Vernon Oswald and Lowell Ahart 1998-5-7 8999 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  CHSC81221  Microseris sylvatica L. P. Janeway; B. Castro, Shirley Innecken 2001-5-9 7036 Colusa Vicinity of Grapevine Creek, Hayes Creek, and Andys Canyon. 377 Comment
  UCD143422  Microsteris gracilis Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  CHSC94312  Mimetanthe pilosa Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  CHSC117783  Mimetanthe pilosa David Isle 2016-7-1 2166 Colusa Sacramento Valley Foothills:~0.9 mi S of Stonyford on N edge Dennus Dr, between chip seal and fence on Isle property(~40' W of E property fenceline and ~ midway between Salt Ck and jct w/ Co Rd 306). Gilmore Peak California. 371 Comment
  JEPS73486  Mimulus L. R. Heckard 1972-7-9 3098 Colusa se slope East Peak; Snow Mt. 2072 Comment
  RSA46870  Mimulus aurantiacus var. aurantiacus Doris K. Kildale 1927-04 3244 Colusa [Unspecified] Comment
  UCD82726  Mimulus cardinalis Craig Thomsen; G. Harrington 2009-5-14 2909 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
  RSA535823  Mimulus douglasii David M. Thompson 1988-3-28 860 Colusa 2.0 mi W of Bear Valley Road along Bartlett Springs Road. 0.25 mi W of a road culvert for a small stream. 534 Comment
  UCD122617  Mimulus douglasii Delanne Belshaw 1975-4-20 11 Colusa Bear Valley Road, 7.8 miles north of junction of State Highways 20 and 16. Comment
  RSA724956  Mimulus floribundus L. Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS80762  Mimulus floribundus L. R. Heckard and J. C. Hickman 1981-7-30 5729 Colusa crossing Trout Creek (se side of mt.); Snow Mt. 1828 Comment
  CDA41790  Mimulus guttatus L. Ahart 2003-7-14 10383 Colusa 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. Comment
  SEINET13710597  Mimulus guttatus Lowell William Ahart, Lowell William Ahart 2003-1 10383 Colusa 21 Mi. SW of Williams, about 2 Mi. SW of Jct. Hwy 20 with Bear Valley Road (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 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
  JEPS80055  Mimulus microphyllus L. R. Heckard and J. Hickman 1979-6-15 5055 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  UC725827  Mimulus microphyllus A. A. Heller 1942-5-29 16482 Colusa 1/2 mi w Highway #16 (along State Highway #20) Comment
  UC726324  Mimulus microphyllus A. A. Heller 1940-5-14 15619 Colusa 4 mi n Maxwell Comment
  UCD122648  Mimulus microphyllus R. A. Christison 1960-4-17 28 Colusa on road to Wilbur Springs, 2 miles north of State Highway 20. Comment
  UCD81724  Mimulus nasutus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5728 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
  UCD40884  Mimulus nasutus Richard Schulhof 1984-4-21 8 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 Comment
  JEPS7899  Mimulus nudatus Milo S. Baker 1953-5-11 12651 Colusa near Lake-Colusa Line (Hiway 20) Comment
  RSA296392  Mimulus nudatus Robert F. Hoover 1941-5-2 4982 Colusa Just east (about 6 miles S of Wilbur Springs) of Lake Co. line on Williams-Clear Lake Hwy Comment
  UC1010390  Mimulus nudatus Milo S. Baker 1953-5-11 12651 Colusa near Lake-Colusa Line (Hiwy 20) Comment
  UC886310  Mimulus nudatus Alice Eastwood, John Thomas Howell 1938-5-16 5636 Colusa on road to Williams (Lake-Colusa county line) Comment
  UCD66858  Mimulus nudatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5061 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Destinella Flat. Serpentine meadow on the east side of main drainage. 554 Comment
  JEPS108907  Mimulus pilosus Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  JEPS60201  Mimulus rattanii L. R. Heckard 1969-5-29 2237 Colusa about 6 1/2 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  UC1614402  Minuartia cismontana Charles M. Belshaw 1937-4-25 2833 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  HSC31564  Minuartia douglasii Teresa Prendusi 1974-5-4 49 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  UCD66610  Minuartia douglasii Craig D. Thomsen 2000-5-11 2283 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
  UCD82385  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-12 2827 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  UCD82737  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-14 2918 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
  HSC47702  Minuartia douglasii J. P. Smith, J. O. Sawyer 1978-4-29 9788 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  JEPS15565  Minuartia nuttallii subsp. gregaria G. Thomas Robbins with L. R. Heckard 1956-7-25 3716 Colusa slope above Dark Hollow Creek (a tributary of Middle Fork Stony Creek) (on s flank of mt., at lower edge of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. East 1981 Comment
  CAS-BOT-BC229599  Mirabilis greenei Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N of San Francisco Bay. Flood-bed of Stony Creek Comment
  UC71771  Mollugo verticillata H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS89251  Moluccella laevis Frank A. Leach 1919-1-1 Colusa w of Williams (Elbert Brim ranch) Comment
  UCD84445  Monardella Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6053 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
  UCR175120  Monardella Mark A. Elvin, Mark S. Brunell, D. Isle 2006-8-3 5021 Colusa North Inner Coast Ranges, Snow Mtn: Summit Spring Trail, 1.4 km west of Snow Mtn West summit and 800 m N of Cedar Camp 1989 Comment
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May 16 2007
  JEPS80272  Monardella odoratissima subsp. glauca L. R. Heckard and J. Hickman 1980-9-16 5455 Colusa East of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  UC1585895  Monardella odoratissima subsp. glauca Barbara Ertter 1989-7-1 8618 Colusa ca. 12 air mi wsw Stonyford (road to Goat Mt. Lookout 0.4 mi s of Rt. M-10 (Bear Creek-Fouts Spring Rd.) at head of creek); South Fork Stony Creek 1371 Comment
  CHSC92639  Monardella odoratissima subsp. odoratissima D. Isle 2005-9-14 1174 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Meadow west of Angel Spring, Snow Mountain Wilderness. 10S 0522348E 4358185N = Angel Springs. Comment
  UCD67691  Monardella sheltonii D. Sanchez-Mata 1996-6-27 s.n. Colusa Williams, Blue Ridge, Bear Creek. 320 Comment
  UCD70238  Monardella sheltonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Bear Valley Road. Bear Valley Creek. 350 Comment
  CAS-BOT-BC220675  Monardella villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  UCD70237  Monardella villosa 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
  UCD80833  Monardella villosa Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5290 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Canyon to the north of Brophy Canyon, ca. 100 ft from entrance at Bear Creek. 233 Comment
  HSC96822  Monardella villosa subsp. villosa L. Ahart 2006-6-11 12672 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
  CHSC78236  Monolopia major Vernon H. Oswald 2000-4-20 9915 Colusa Bear Valley Road. 2.5 mi south of Rim Rd. (to Bartlett Springs). 402 Comment
  JEPS35229  Monolopia major W. L. Jepson 1932-5-7 16254 Colusa valley above Venado 274 Comment
  UCD163879  Monolopia major Craig D. Thomsen 2002-3-27 2574 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
  POM256988  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 427 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
  UC90430  Monolopia major K. Brandegee April 1889 Colusa Comment
  JEPS80371  Montia fontana L. R. Heckard and J. Hickman 1981-6-22 5605 Colusa s side of east ridge of East Peak, Snow Mountain East Peak; Snow Mountain, East Peak 1950 Comment
  UCD86504  Muhlenbergia andina Craig Thomsen 2004-9-16 s.n. Colusa along Goat Mountain road. Comment
  CHSC89832  Muhlenbergia filiformis B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1213 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. 91 Comment
  JEPS15550  Muhlenbergia filiformis G. Thomas Robbins with L. R. Heckard 1956-7-25 3707 Colusa in meadow along trail due s Snow Mt. East (skirting eastern base of ridge forming Snow Mt. West) 1981 Comment
  SEINET3243572  Muilla maritima Frank W. Gould 1938-1 302 Colusa Four miles north of Maxwell, Colusa County. Comment
  CAS-BOT-BC83271  Myosurus minimus Roxana S. Ferris 1917-4-10 507 Colusa 4 miles east of Williams. Comment
  POM312436  Myosurus minimus subsp. apus H. L. Mason 1953-4-5 14510 -a Colusa 3 miles east of Maxwell 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
  UCD81889  Najas gracillima Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5773 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
  UC1099999  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-9-9 1891 Colusa 1 mi e of Williams Comment
  UC1100016  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 mi w of Colusa (on Williams Highway by bridge) Comment
  CAS-BOT-BC456162  Najas guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa Two miles west of Colusa on Williams highway by bridge 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
  UCD138157  Najas guadalupensis subsp. guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa 2 miles west of Colusa on Williams highway by bridge. Comment
  POM174566  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade of Williams-Strongford Road Comment
  UC1146671  Nassella cernua Freed W. Hoffman 1944-7-13 1957 Colusa between Indian Valley and Bear Valley; North Coast Ranges Comment
  UCD57857  Nassella cernua Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 44 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
  UCD63742  Nassella lepida Craig D. Thomsen 2008-5-23 2751 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. 420 Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 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
  CHSC112917  Navarretia heterandra B. Castro; Robin Carter, Amy Lyons 2010-5-13 1808 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 131 Comment
  CHSC76766  Navarretia heterandra J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 114 Comment
  CHSC86970  Navarretia heterandra B. Castro 2003-5-14 1431 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. At lower end of SE-trending ridge, on west edge of Sacramento Valley. 140 Comment
  CHSC89844  Navarretia heterandra B. Castro; L. Janeway 2001-5-2 1242 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
  JEPS117022  Navarretia heterandra David Gowen 2008-5-24 920 Colusa West side of Bear Valley Road, about 6.7 miles north of Hwy 20. Comment
  JEPS80209  Navarretia intertexta L. R. Heckard and J. C. Hickman 1980-7-3 5363 Colusa Across road (north of) from Summit Springs, southwest slope of Snow Mt. 1548 Comment
  CHSC69683  Navarretia intertexta subsp. intertexta Vernon Oswald 1984-7-23 1617 Colusa Lily Pond near Letts Lake in Mendocino National Forest. On a road along the edge of a meadow. 1280 Comment
  JEPS108184  Navarretia jepsonii David Gowen 2005-6-22 446 Colusa Goat Mtn. Rd. (dirt road), ca. 1 mile E. of Ladoga Stonyford Rd., just inside the Mendocino Nat'l Forest boundary. Comment
  UC142967  Navarretia jepsonii Katharine Brandegee 1910-8-10 Colusa near Eppersons (sw Colusa County); Bear Valley Comment
  UC856832  Navarretia jepsonii A. A. Heller 1916-6-6 12356 Colusa about 3 mi w Leesville (on the grade); Coast Range Comment
  UCD164150  Navarretia jepsonii Craig Thomsen 2000-5-12 2328 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  CHSC112918  Navarretia nigelliformis subsp. nigelliformis B. Castro; Robin Carter, Amy Lyons 2010-5-13 1807 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 121 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  CHSC89877  Navarretia tagetina B. Castro; L. Janeway, S. Innecken 2001-5-9 1246 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Along dirt road paralleling N-S-trending perennial creek. 365 Comment
  UC1618098  Navarretia viscidula Donald G. Nelson 1940-6-9 Colusa Stoneyford Comment
  UC726846  Navarretia viscidula A. A. Heller 1940-6-7 15812 Colusa 3 mi s Stonyford Comment
  CHSC79485  Nemacladus montanus B. Castro; L. P. Janeway 2000-5-4 1138 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD63119  Nemacladus montanus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4949 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
  CHSC77935  Nemophila heterophylla Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  SD237466  Nemophila heterophylla G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14372 Colusa Inner North Coast Range Foothills: along CA-20, 14.3 miles southwest of Williams. (Salt Canyon 7.5'Q) 374 Comment
  SEINET5585803  Nemophila heterophylla Richard R. Halse 2013-1 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCD66587  Nemophila heterophylla Craig D. Thomsen 2000-4-12 2158 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
  UCD120236  Nemophila menziesii Gene R. Williams 1961-3-29 32 Colusa South of Bear Valley; 3 miles north of junction of State Highways 16 and 20. Comment
  UCSB23986  Nemophila menziesii Masero, Ann 1967-2-12 Colusa Along roadside of Wilber Springs Road; 1.4 miles south of Wilber Springs; in Northern inner Coastal Ranges 548 Comment
  JEPS85842  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  CHSC86958  Nemophila pedunculata Beth Hendrickson; Jenny Marr 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 158 Comment
  JEPS80381  Nemophila pedunculata L. R. Heckard and J. Hickman 1981-6-22 5614 Colusa along Dark Hollow Creek (Big Meadow, Snow Mt.); Snow Mt., , Big Meadow 1889 Comment
  UC595048  Nemophila pedunculata Annetta Carter 1938-5-8 1381 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC638658  Nemophila pedunculata Ethel Crum 1938-5-8 2025 Colusa 3 mi n Leesville; Inner North Coast Range 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
  UCD63012  Nemophila pedunculata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4665 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. 319 Comment
  UC38962 Image available Neostapfia colusana J. Burtt Davy 1898-5-26 Colusa near Princeton; ; Princeton, Colusa Co. Comment
  CHSC112643  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
  JEPS120705  Nicotiana acuminata var. multiflora Lowell Ahart 2013-10-1 19084 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
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  JEPS87760  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
  UC194932  Nicotiana quadrivalvis H. M. Hall 1916-6-16 10269 Colusa near Arbuckle (Colusa to Woodland) Comment
  UC71766 Image available Orobanche californica subsp. jepsonii H. P. Chandler Oct 1905 Colusa Princeton. Comment
  CAS-BOT-BC502598  Orobanche californica subsp. jepsonii Roxana Stinchfield 1916-7-11 451 Colusa Colusa--Williams Road at trough Comment
  POM286327  Orthocarpus erianthus Lyman D. Benson 1935-3-27 6339 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  POM298007  Orthocarpus lithospermoides var. bicolor A. A. Heller 1919-5-10 13116 Colusa W of Leesville. Comment
  CHSC88558  Packera clevelandii L. P. Janeway 2001-6-6 7117 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  UCD64029  Packera clevelandii Craig D. Thomsen 2000-5-11 2286 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
  CAS-BOT-BC231236  Packera eurycephala var. eurycephala Roxana Stinchfield Ferris 1926-4-23 6454 Colusa Stonyford. Comment
  UC91676  Packera eurycephala var. eurycephala Brandegee May 1887 Colusa Epperson's Comment
  CHSC112746  Panicum capillare Lowell Ahart 2013-10-1 19100 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles (air) northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  POM313202  Panicum dichotomiflorum H. L. Mason 1945-9-19 12720 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UC1101582  Panicum dichotomiflorum subsp. dichotomiflorum Herbert L. Mason 1945-9-19 12720 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River Comment
  CHSC70988  Papaver rhoeas Vernon Oswald; Lowell Ahart 1998-5-7 8990 Colusa Sites-Lodoga Rd. just west of Grapevine Pass and County Rd. 401 to Elk Creek: Chaparral. 481 Comment
  UC1151667  Parapholis incurva Beecher Crampton 1958-5-19 4825 -A Colusa along US Hwy 99-W, 4 mi s Maxwell Comment
  UCD88469  Parapholis incurva A. A. Beetle 1942-4-1 3271 Colusa 12 miles north of Williams. Comment
  CAS-BOT-BC413468  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Sycamore Slough. Stinchfield ranch Comment
  CAS-BOT-BC259722  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Colusa - Williams Road at the trough Comment
  CHSC94712  Paspalum distichum Lowell Ahart 2006-9-26 13352 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
  RSA724980  Paspalum distichum L. Ahart 2006-9-26 13352 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UCD66918  Paspalum distichum Craig D. Thomsen; G. Harrington 2008-7-6 2780 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
  UCD88914  Paspalum distichum K. Esau; D. Hartmann 1941-7-17 s.n. Colusa near Williams. 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
  CHSC62850  Pedicularis densiflora Vernon H. Oswald 1994-3-23 6012 Colusa 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. 518 Comment
  UCD110808  Pedicularis densiflora Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD83683  Pedicularis densiflora John Rosenthal; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. East slope of Walker Ridge. Eaton Springs area. 716 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
  CHSC43542  Pellaea andromedifolia Lowell Ahart 1976-11-14 1003 Colusa About 3 miles west of Sites. 365 Comment
  UCR225459  Penstemon heterophyllus subsp. australis Ellen Dean, Gordon Harrington J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5114 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
  UCR206380  Penstemon heterophyllus subsp. purdyi George K. Helmkamp, E. A. Helmkamp 2009-5-20 14756 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  POM231385  Penstemon heterophyllus subsp. purdyi M. S. Baker 1937-5-17 8659 Colusa Hwy 20, soon after entering hills from Williams. 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
  CHSC26461  Penstemon heterophyllus var. purdyi L. V. Ritter 1969-4-30 224 Colusa Ca. 10 mi sw of Williams, s side of Hwy. 20. Comment
  CHSC84198  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  NY601768  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Above Salt Creek, Lower Lake-Williams road, 11 miles northeast of Lake-Colusa line, Inner North Coast Ranges. 152.4 Comment
  UC614476  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Lower Lake-Williams Road 11 mi ne Lake-Colusa Line (above Salt Creek); Inner North Coast RAnges, above Salt Creek 152 Comment
  UCD82488  Penstemon heterophyllus var. purdyi Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5674 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. 853 Comment
  NY601740  Penstemon heterophyllus var. purdyi C. C. Freeman 1983-5-22 1891 Colusa CA 20, 2.2 miles north-northeast of the junction of CA 20 & 16 in the foothills of the Sierra Cascades. Comment
  NY601742  Penstemon heterophyllus var. purdyi J. C. Clausen 1935-5-20 1015 Colusa 18 miles west of Williams on the Bartlett Springs road. Comment
  NY601787  Penstemon heterophyllus var. purdyi J. R. Maze 1971-4-14 955 Colusa About 2 miles south of pass just beyond Leesville on Stonyford - Williams road Comment
  UC76098  Penstemon heterophyllus var. purdyi Miss M. Alice King 1905-1 Colusa near College City (hills beyond Arbuckle); Sacramento Valley, near College City, Arbuckle Comment
  CDA8447  Pentachaeta exilis N. van Kleeck, Willa May Lowary 1970-4-18 Colusa Bear Valley, just south of Ladoga. 0 Comment
  UC1532348  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near the Lily Pond and Letts Lake. 1188 Comment
  CHSC42651  Perideridia kelloggii Vernon Oswald 1986-6-30 2175 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  JEPS75733  Perideridia kelloggii L. R. Heckard 1974-9-9 3875 Colusa Just northeasts of rocky promontory southeast of Foutch Camp; Snow Mts. Comment
  SEINET7929202  Perideridia kelloggii K. Morris, Conrad; Dunn 1973-6-6 379 Colusa On Hwy 20, 0.3 mi E of Lake County Line.; 0 Comment
  UC875337  Perideridia kelloggii A. A. Heller 1916-6-6 12361 Colusa grade about 3 mi w Leesville; Coast Range Comment
  UCD127855  Perideridia kelloggii K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, on U.S. #20. Comment
  JEPS73489  Perideridia oregana L. R. Heckard 1972-7-9 3101 Colusa East Peak Snow Mt. (scree slope on se slope) 2011 Comment
  CHSC107483  Persicaria amphibia Jeanne Pendell 2010-7-17 1918 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East arm of East Park Reservoir, in the lake. 365 Comment
  CHSC84960  Persicaria amphibia Lowell Ahart 2003-10-23 10656 Colusa In 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
  RSA0118884  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 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
  CHSC94698  Persicaria maculosa Lowell Ahart 2006-9-26 13354 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
  HSC47736  Petrorhagia dubia Thomas W. Nelson, Jane P. Nelson 1978-4-29 3942 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CDA15464  Phacelia corymbosa G. F. Hrusa, WTD 1998-6-19 14601 Colusa North Coast Ranges; Above Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CDA16099  Phacelia corymbosa G. F. Hrusa 1999-5-16 15044 Colusa North Coast Ranges; above Fouts Springs. 594 Comment
  JEPS95504  Phacelia distans Vernon H. Oswald and L. Ahart 1994-3-23 6021 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  UCD64438  Phacelia divaricata Craig D. Thomsen 2000-4-4 2071 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
  UCR212377  Phacelia divaricata Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek 358 Comment
  CHSC12748  Phacelia egena L. V. Ritter 1969-4-30 227 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. 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
  UCD57821  Phacelia imbricata Gordon Harrington 2007-4-17 32 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. 552 Comment
  JEPS2143  Phacelia imbricata subsp. imbricata W. L. Jepson 1932-5-8 16296 Colusa n Stonyford (w Colusa Co.) 365 Comment
  POM163452  Phacelia imbricata subsp. imbricata Roxana S. Ferris 1926-4-23 6420 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  SEINET5520514  Phacelia imbricata subsp. imbricata R. R. Halse 2010-3-25 7850 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  UC901839  Phacelia imbricata subsp. imbricata L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3322 Colusa ridge between Bear Valley and Indian Valley (near Colusa-Lake Co. line) 609 Comment
  CHSC32213  Phacelia mutabilis James Jokerst 1980-8-6 1059 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
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Feb 2 2007
  CHSC107954  Phalaris aquatica B. Castro; T. Boullion 2011-4-20 1832 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 800 ft east of Tehama-Colusa Canal. Ca 0.25 mi NW of large +- saline/alkaline wetland/marsh, just south of tilled grain field. 52 Comment
  UCD88035  Phalaris aquatica Beecher Crampton 1963-8-5 6869 Colusa 1/4 mile E of Cortena. Comment
  UCD89177  Phalaris minor Hursh 1919-1 X 3340 Colusa Williams. Comment
  POM207817  Phalaris paradoxa Jos Burtt Davy 1898-05 s.n. Colusa Near Princeton. Comment
  UCR206810  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-17 14389 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  JEPS86610  Phlox gracilis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6710 Colusa 0.5 mi ne Summit Springs (sw flank of Snow Mountain, Colusa-Lake Co line); Snow Mountain 1640 Comment
  CHSC20708  Phoradendron densum Robert A. Schlising; Glenn Keator 1962-1-31 2033 Colusa 426 Comment
  JEPS80199  Phoradendron libocedri L. R. Heckard and J. Hickman 1980-7-3 5354 Colusa n. side of rd. across from Summit Springs (Snow Mt., Colusa-Lake Co. boundary); Snow Mt. Comment
  SD257382  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the juncton with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian (Meridian 7.5'Q) 20 Comment
  JEPS80242  Phoradendron villosum L. R. Heckard and J. Hickman 1980-7-3 5403 Colusa near Summit Springs (Snow Mt.); Snow Mt. Comment
  UCD80895  Phragmites australis Jack Alderson; C. Thomsen 2009-3-18 24 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Headwaters of Craig Canyon. 527 Comment
  UC727675  Phyla lanceolata Milo S. Baker 1946-9-3 11622 Colusa near locked gate Colusa Gun Club (Butte Sink); Butte Sink Comment
  UC985936  Physalis lancifolia Herbert L. Mason and Verne Grant 1946-8-7 12979 Colusa 8 mi n Colusa; Butte Sink 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
  UC1051745  Pickeringia montana var. montana Helen K. Sharsmith 1953-6-20 4301 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CHSC88510  Pilularia americana Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC105196  Pinus attenuata B. Castro; L. P. Janeway 1999-7-5 1010 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 Lovelady Ridge rd ca 0.35 mi N of its jcn with USFS Rd 16N06, near top of Pacific Ridge. 1097 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
  UCD57447  Pinus sabiniana Gina Darin; 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 part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  JEPS110173  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
  CAS-BOT-BC227986  Plagiobothrys Doris K. Kildale 1928-5-8 5014 Colusa 3 miles S of Arbuckle Comment
  POM163443  Plagiobothrys Roxana S. Ferris 1926-4-21 6295 Colusa 3 mi W of Colusa.. Comment
  UCR206385  Plagiobothrys George K. Helmkamp, E. A. Helmkamp 2009-5-20 14751 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCD57876  Plagiobothrys bracteatus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 53 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
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC77920  Plagiobothrys canescens Beth Hendrickson; Jean Witzman 1999-4-21 Colusa Vicinity of Antelope Valley and Sites. 137 Comment
  SD237378  Plagiobothrys canescens G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14750 Colusa Inner North Coast Ranges: along CA-16 at Cowboy Cammp 1.0 mile south of the junction with CA-20, adjacent to Bear Creek (Glascock Mountain 7.5'Q) 331 Comment
  UCD120813  Plagiobothrys canescens Alpaslun Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Comment
  UCD56900  Plagiobothrys greenei Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3503 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  CHSC31260  Plagiobothrys humistratus R. A. Schlising; K. R. Stern 1980-5-5 3586 Colusa NW of Colusa; Delevan National Wildlife Refuge; about 1.4 mi south of north margin of refuge. Comment
  UC78046  Plagiobothrys infectivus Katharine Brandegee Apr 1889 Colusa Leesville Comment
Read comments
May 22 2010
  UCD18843  Plagiobothrys leptocladus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 151 A 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
  JEPS80194  Plagiobothrys nothofulvus L. R. Heckard and J. Hickman 1980-7-3 5347 Colusa ca 10 mi w Stonyford (just w of Summit Springs, sw of Snow Mt., Colusa-Lake County boundary) 1548 Comment
  UCD82471  Plagiobothrys nothofulvus Craig Thomsen; G. Harrington 2009-5-12 2849 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD120895  Plagiobothrys nothofulvus David V. Glover 1960-4-14 50 Colusa Cache Creek, State Highway 16, 10 miles north of Rumsey. 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
  UCD63008  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4661 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. 319 Comment
  UCR212317  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2096 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
  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-BC60828  Planodes virginica L. R. Abrams 1928-5-8 12590 Colusa 2 miles south of Arbuckle. Comment
  CHSC110844  Plantago coronopus Justin Isle; David Isle 1989-4-28 Colusa Sacramento River Watershed,S side of Maxwell Rd, 2 mi SE of Sites, just SE of Sites Quarry Squarry face. In dry area N of Stone Corral Ck. 106 Comment
  CHSC114997  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
  JEPS123891  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa About 5 1/2 miles east of Maxwell. Comment
  UC102743  Plantago elongata T. S. Brandegee Apr 1889 Colusa Colusa Junction 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
  CHSC57195  Plantago erecta John Griffish 1980-4-16 6 Colusa Ca. 7 mi s of Stonyford. 401 Comment
  CHSC59997  Plantago erecta Linda A. Bell 1975-4-19 44 Colusa Bear Valley Road, 1 mile north of State Highway 20. Comment
  CHSC86120  Plantago erecta Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  RSA424754  Plantago erecta Aaron Liston, M. Blumler 1987-4-26 668 -3 Colusa East Park Reservoir, 3.2 miles E of Stonyford 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
  UCD64271  Plantago erecta Craig D. Thomsen 2000-3-31 2067 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
  UCD82366  Plantago erecta Robin McMaster 1973-4-15 336 Colusa Bear Valley. Comment
  CHSC94449  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC93145  Platanus racemosa Roxana S. Ferris 1917-4-17 628 Colusa Sycamore Slough. Comment
  CAS-BOT-BC93146  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Sycamore Slough. Stinchfield Ranch. Comment
  CHSC19695  Platystemon californicus L. A. Wright Jr. 1971-3-27 16 Colusa W side of Hwy 20, ca. 1 mi nw of junc of Hwy 16 and 20. 243 Comment
  CHSC23889  Platystemon californicus D. Joley 1968-3-30 Colusa Found on hwy. 20 ca. 20 mi e of Clearlake. Comment
  CHSC59768  Platystemon californicus Alvin G. Cary 1975-4-20 3 Colusa Field on west side of road. Bear Valley Road, 9.6 miles north of State Highway 20. Comment
  JEPS51624  Platystemon californicus Alice King 1906-4 Colusa College City Comment
  SD8259  Platystemon californicus Brandegee Apr 1889 Colusa Colusa Junction Comment
  SEINET3124160 Image available Platystemon californicus Sandra Wainwright 1969-4-13 1 Colusa Bear Valley, 9.5 miles north of State Highway 20 Comment
  UCD164029  Platystemon californicus Indya Messier 2016-4-9 3 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. 324 Comment
  CAS-BOT-BC91597  Platystemon californicus K. Brandegee 1889-4-1 s.n. Colusa Unspecified. Comment
  SEINET12091618  Platystemon californicus C. M. Corda 1982-1 4 Colusa Ca 0.3 mi W of jct Hwys 20 and 16, S side Bear Cr., ca 100 yds from S side Hwy 20, ca 18 mi SW of 322 Comment
  UCD68862  Platystemon californicus G. Robinson 1984-4-21 11 Colusa Bear Valley, California, 30 m. West of Wilbur Springs Road, 3.2 miles North of Highway 20. In valley grasslands - pasture forbs plant association, dominated by composites, on hard, black clay soil, in full sunlight, common in area. Solitary, upright plants. Flowers, yellow-white, 'cream cup. 390 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
  UCSB63724  Platystemon californicus Devanna, Martin 1987-4-4 Colusa Ca. 0.3 mi w of jct Hwys 20 and 16; S side of Bear Creek; ca. 18 mi sw of Williams; Wilbur Springs Quadrangle; S central border of Sect. 36. T14N, R5W 321 Comment
  RSA590191  Platystemon californicus var. californicus Michael A. Vincent, Robert Rhode 1996-3-30 7293 Colusa Along Bear Valley Road, 4.6 miles N of junction Wilbur Springs Road 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
  UCD82392  Plectritis ciliosa Craig Thomsen; G. Harrington 2009-5-12 2835 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
  SEINET5742209 Image available Plectritis ciliosa Gene R. Williams 1961-1 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Hwy 20.; Bear Valley Comment
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County Comment
  CDA32826  Plectritis congesta subsp. brachystemon P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC1053421  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UCD162996  Plectritis macrocera Craig D. Thomsen 2000-3-31 2085 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.75 mile west of Hwy 20/16 intersection. 345 Comment
  UCD41210  Plectritis macrocera John Snelling 1986-5-17 3 - Colusa Mill Valley campsite off of Forest Service Road 18N01. Comment
  UCD63007  Poa annua Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4660 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. 319 Comment
  UCR206675  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-1-31 14322 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
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  CHSC115384  Poa bulbosa Lowell Ahart 2015-4-1 19991 Colusa 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
  CHSC27859  Poa bulbosa Dieter D. King 1978-1-2 Colusa Salt Canyon n side of Salt Creek, Hwy 20 11 mi wsw of Williams. 128 Comment
  CHSC35776  Poa bulbosa Gail B. Phillips 1982-3-27 3 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC57562  Poa bulbosa Steven Triano 1987-4-4 16 Colusa Salt Canyon, n side of Salt Creek, ca. 40 ft s of Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD97127  Poa bulbosa Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6911 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  UCD82624  Poa pratensis Craig Thomsen; G. Harrington 2009-5-12 2894 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD84517  Poa pratensis Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6068 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  UCD163221  Poa secunda Craig D. Thomsen 2000-4-12 2142 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
  CAS-BOT-BC236333  Poa secunda subsp. secunda Roxana S. Ferris 1917-4-14 575 Colusa Arbuckle - Rumsey Road. Foothills W of Arbuckle Comment
  CHSC112213  Poa secunda subsp. secunda Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18643 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
  CHSC77408  Poa secunda subsp. secunda Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC8244  Poa secunda subsp. secunda J. G. Moore 1969-4-12 2 Colusa Hwy 20, 15 mi. w of Williams on n and s sides of road. 106 Comment
  JEPS80373  Poa secunda subsp. secunda L. R. Heckard and J. Hickman 1981-6-22 5606 Colusa s side of e ridge of E Peak Snow Mt 1950 Comment
  JEPS81341  Poa secunda subsp. secunda L. R. Heckard with J. Hickman 1982-7-6 5954 Colusa West Peak Snow Mt 2103 Comment
  UCD90886  Poa secunda subsp. secunda John R. Davey 1967-12-2 90 Colusa Border, ca. 5-6 miles WSW of Leesville, Bartlett Springs Road N of Baldy Mountain. 609 Comment
  JEPS62433  Pogogyne douglasii W. L. Jepson 1920-5-23 8966 Colusa near Leesville, foot of Bartlett grade, west side of Bear Valley, w Colusa Co. Comment
  CHSC71641  Pogogyne zizyphoroides Michael A. Wolder 1988-5-12 Colusa Colusa National Wildlife Refuge south west of Colusa. At the edge of a seasonal wetland in Tract 20, Cell 1. 16 Comment
  JEPS68348  Polanisia dodecandra subsp. trachysperma L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2788 Colusa ca. 2 mi. n.w. Sites 243 Comment
  UCD77929  Polanisia dodecandra subsp. trachysperma Robert E. Preston 1999-9-24 1244 Colusa Along Highway 162, 2 miles W of Tehama Colusa Canal. 91 Comment
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  CAS-BOT-BC413965  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-6-17 292 Colusa Near College City Comment
  JEPS80124  Polygonum bistortoides L. R. Heckard and J. Hickman 1980-7-1 5282 Colusa cirque between East Peak and West Peak (ca 10 mi w of Stonyford); Snow Mt. 2042 Comment
  JEPS108782  Polygonum persicaria Lowell Ahart 2006-9-26 13354 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
  CDA43071  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 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. 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
  UCD91185  Polypogon maritimus Beecher Crampton 1958-5-19 4810 Colusa West of Lodoga. Little Stony Creek. Comment
  UCR228273  Polypogon maritimus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5065 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  CAS-BOT-BC232541  Polypogon monspeliensis A. A. Heller 1902-5-19 5570 Colusa Near Colusa 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
  UCD18842  Polypogon monspeliensis Vernal Pool Team 2001; Carol Witham and 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, UTMs: 10S0587786; 4336302. Comment
  UCD61444  Polypogon monspeliensis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3889 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
  JEPS127193  Polystichum munitum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20720 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  UCD83719  Populus fremontii subsp. fremontii Joseph Schlottman; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  UCD67085  Potamogeton diversifolius Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5107 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
  UCD35976  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E Cortena. Comment
  UC1099840  Potamogeton pectinatus Herbert L. Mason 1946-8-6 12957 Colusa 4 mi s of Colusa (on Colusa-Marysville Highway, w side of Sacramento River); Sacramento River Comment
  UCD67086  Potamogeton pusillus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5108 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
  UCD164036  Poterium sanguisorba Amber Flores 2016-4-9 2 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. 311 Comment
  UCD35780  Poterium sanguisorba Beecher Crampton 1962-4-17 6217 Colusa Sycamore. Comment
  RSA0014801  Proboscidea louisianica Richard Snow 1958-8-3 672 Colusa Near State Highway 20, on the road to Leesville. Comment
  JEPS80440  Prunella vulgaris var. lanceolata L. R. Heckard and J. Hickman 1980-7-3 5369 Colusa sw slope Snow Mt. (about Summit Springs); sw slope Snow Mt., Summit Springs 1554 Comment
  JEPS80050  Prunus emarginata L. R. Heckard with J. Hickman 1979-6-15 5050 Colusa Snow Mountain, East trail from Frog Pond to cirque of east and w peaks Snow Mountain 1981 Comment
  UCD163849  Prunus subcordata Craig D. Thomsen 2000-6-7 2366 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  POM174580  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga Comment
  CHSC79456  Pseudognaphalium californicum B. Castro; L. P. Janeway 2000-5-4 1140 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC94739  Pseudognaphalium californicum Lowell 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
  CHSC79457  Pseudognaphalium luteoalbum B. Castro; L. P. Janeway 2000-5-4 1136 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  JEPS120792  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 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
  CAS-BOT-BC357551  Pseudognaphalium stramineum Roxana Stinchfield 1916-7-8 372 Colusa Sycamore Slough-Stinchfield Ranch Comment
  UCD36225  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  JEPS40460  Psilocarphus brevissimus var. brevissimus W. L. Jepson 1934-5-3 16598 Colusa College City Comment
  CHSC115394  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  JEPS124212  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  JEPS75721  Psilocarphus tenellus L. R. Heckard 1974-9-9 3853 Colusa just se Foutch Camp; Snow Mountain 1889 Comment
  CHSC80346  Psilocarphus tenellus var. tenellus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope 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
  UC1738833  Puccinellia simplex Dean W. Taylor 1988-3-24 9462 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles North of Ware Road 24 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
  JEPS75754  Pyrola dentata L. R. Heckard and R. Bacigalupi 1976-9-6 4436 Colusa East of Trout Creek crossing, Snow Mountain 1859 Comment
  RSA0080624  Pyrola dentata Barbara Ertter 1989-7-1 8593 Colusa Road to Goat Mt Lookout 2.2 mi 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
  JEPS80464  Pyrola picta Alice Q. Howard 1972-7-10 8 A Colusa Trail from Fouts Camp to Box Springs, tje highest of the two such areas on the North side of the ridge separating Trout and Paradise Creek. Snow Mountain 1676 Comment
  SFV10851  Pyrola picta M. L. Vincent 1968-6-6 789 Colusa On road to Stony Ford from Goat Mountain, 2.4 miles west of Old Mills Campground. 1220 Comment
  JEPS80830  Quercus L. R. Heckard, and J. Hickman 1981-7-31 5802 Colusa s and above Dark Hollow Creek (e side of Snow Mt.); Snow Mt. 1767 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
  UCD83633  Quercus berberidifolia Fanny Ye; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 Comment
  SD197785  Quercus douglasii G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along River Road (generally following the Sacramento River), 1.1 miles north of Colusa. 17 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
Read comments
Apr 18 2009
  UC1051721  Quercus durata Helen K. Sharsmith 1953-6-19 4275 Colusa e slope Snow Mountain (on Bonny Doon road); Inner North Coast Ranges, Mendocino National Forest 670 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
  UCD84514  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6065 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CDA21886  Quercus durata var. durata L. P. Janeway 2000-5-31 6774 Colusa Inner North Coast Ranges.; On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. Comment
  HSC31697  Quercus durata var. durata Thomas E. Higley 1974-5-4 64 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  UC1299701  Quercus garryana Freed W. Hoffman 1948-6-26 2517 Colusa n side Goat Mt. (near forks of Stonyford and Goat Mt. roads, w Colusa County) 1653 Comment
  UCD67036  Quercus garryana var. breweri Ellen Dean; Davis Botanical Society 2008-5-31 5017 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  CAS-BOT-BC61588  Quercus lobata Roxana Stinchfield 1916-7-9 428 Colusa grove near Sycamore. Phillips Ranch Comment
  CAS-BOT-BC61589  Quercus lobata Roxana Stinchfield 1916-7-9 428 Colusa grove near Sycamore. Phillips Ranch Comment
  RSA759171  Quercus lobata Doug Goldman 2004-11-1 2916 Colusa East side of Route 45 (Princeton Road). 23 Comment
  SEINET13953521 Image available Quercus lobata L. Blackford, S. Branch, D. Malm 1988-1 79 Colusa 4 mi W on Goat Mt. Road off Lodoga-Stonyford Road in meadow 457 Comment
  SD225831  Quercus palmeri Roger Raiche 1990-12-2 Colusa Across Suphur Creek from Wilbur Springs; Comment
  UCD14525  Quercus palmeri Roger Raiche 1990-12-2 B Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD14531  Quercus palmeri John M. Tucker 1991-8-19 4496 -C Colusa California, Colusa Co.; across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs; Comment
  JEPS73455  Quercus vacciniifolia L. R. Heckard 1972-7-8 3056 Colusa se of Snow Mt.; West Peak 1981 Comment
  CAS-BOT-BC234979  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6064 Colusa On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat 971 Comment
  JEPS83801  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  CHSC118888  Ranunculus arvensis David Isle; Ffrank Pendell 2017-5-17 2172 Colusa Foothills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 toFrank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  CAS-BOT-BC378805  Ranunculus canus var. canus A. A. Heller 1919-5-10 13113 Colusa grade east of Leesville in the oak belt Comment
  CHSC62943  Ranunculus hebecarpus Vernon H. Oswald; Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 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
  SEINET8699529  Ranunculus hebecarpus R. R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca 5.6 miles NW of its junction with CA Hwy 20, W of Williams. 157 Comment
  UC72903  Ranunculus hebecarpus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD57623  Ranunculus hebecarpus Joseph A. E. Stewart; 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. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  UCD97128  Ranunculus hebecarpus Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6912 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  UCD163876  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2464 b Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  UCD65635  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2141 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
  CDA32825  Ranunculus occidentalis var. eisenii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD97058  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins; S. Galen Smith 1950-4-15 1907 Colusa Bear Valley. Comment
  UC1952501  Raphanus Richard Halse 2007-3-22 7105 Colusa Williams, by the junction of 5th Street and B Street 25 Comment
  JEPS75868  Rhamnus californica L. R. Heckard 1974-9-10 3880 Colusa East Circle Trail, along spur running se from the w peak, Snow Mt. Snow Mt. 2011 Comment
  CHSC39791  Rhamnus ilicifolia Eloise Gallatin 1935-5-12 Colusa Above Stonyford. Comment
  HSC97351  Rhamnus ilicifolia J. P. Smith, J. O. Sawyer 2007-9-2 12412 Colusa River Rd. N of Colusa 20 Comment
  JEPS41964  Rhamnus tomentella subsp. crassifolia W. L. Jepson 1920-5-23 8975 Colusa hills w of Bear Valley (on grade over ridge to Indian Valley) Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  UC1299216  Rhamnus tomentella subsp. crassifolia Freed W. Hoffman 1947-6-19 1641 Colusa Cooks Springs, w Colusa County Cooks Springs Comment
  CDA40545  Rhamnus tomentella subsp. crassifolia P. S. Crane 1979-8-14 s.n. Colusa 4 miles west of Ladoga Road on Goat Mountain. 0 Comment
  RSA275357  Rhamnus tomentella subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley road , 2.5 miles from jct with State Route 20, Oak Woodland 366 Comment
  UC1618009  Rhamnus tomentella subsp. tomentella Donald G. Nelson 1940-6-9 693 Colusa e. slopes Snow Mt. (at Happy Camp a private summer camp on Paradise Creek which empties below into the Middle Fork of Stony Creek, n.w. boundary of county); , Happy Camp 731 Comment
  CHSC75707  Rhododendron occidentale Vernon H. Oswald; Lowell Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  HSC71304  Rhus aromatica Thomas W. Nelson, Jane Nelson 1979-4-12 4622 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD57304  Rhus aromatica Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3675 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 366 Comment
  UCSB26060  Rhus aromatica Belshaw, Charles 1937-4-25 Colusa Cooks Springs Comment
  JEPS66281  Rhus trilobata W. L. Jepson 1932-5-8 16295 Colusa n of Stonyford 365 Comment
  CHSC89876  Ribes malvaceum B. Castro; L. Janeway 2001-5-3 1245 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In dry creekbed. Near junction of this side-cyn with dirt road paralleling N-S-trending perennial creek 365 Comment
  HSC31993  Ribes malvaceum Steven Lagos 1974-5-4 59 Colusa Along roadside 747 Comment
  HSC94175  Ribes malvaceum var. malvaceum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 4 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  LA97624  Ribes roezlii J. M. Tucker; 1959-5-30 3524 Colusa Goat Mountain, ca. 1.25 mi. NW of Goat Mountain Lookout 1767 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
  UCD163332  Rigiopappus leptocladus Craig D. Thomsen 2009-5-3 2801 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD66448  Rigiopappus leptocladus Craig D. Thomsen 2000-5-11 2293 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
  UCR212316  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 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
  UCR201553  Rosa californica George K. Helmkamp, E. A. Helmkamp 2008-10-14 14262 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SEINET3450732  Rosa multiflora Unknown 2003-7-14 10389 Colusa North of Arbuckle, North of Arbuckle, west side of Bear Valley Road, about 0.25 miles north of the intersection of Bear Valley Road and Wilber Springs Road and bridge 370 Comment
  CAS-BOT-BC158727  Rubus ursinus Roxana S. Ferris 1926-4-21 6310 Colusa Oak Graove Sycamore Slough, near Sycamore Comment
  UCD61482  Rumex crispus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3908 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
  CAS-BOT-BC433469  Rumex dentatus Roxana S. Ferris 1926-4-21 6285 Colusa 3 miles west of Colusa Comment
  UCD163344  Rumex salicifolius Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  HSC102730  Saccharum ravennae J. P. Smith 2013-8-23 13779 Colusa Along State Route 16 above Cache Creek. 192 Comment
  JEPS113057  Saccharum ravennae Gordon Leppig 2001-9-13 1610 Colusa Rt. 16. Mile marker 4.7-4.58. Bear Creek Gravel bar. Comment
  JEPS113058  Saccharum ravennae Gordon Leppig 2001-9-13 1611 Colusa Rt. 16. Cache Creek bridge #22-19. Comment
  UCD18528  Sagittaria June McCaskill; with Mr. Harvey and Loren Davis 1954-8-9 363 Colusa ca.1 mi. east of Princeton and 500 yds. south of Glenn County line. Comment
  POM313039  Sagittaria calycina H. L. Mason, Verne Grant 1946-8-6 12961 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of 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
  UCD138041  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa Sacramento river, 1 mile north of Colusa on east side, below causeway. Comment
  CAS-BOT-BC445794  Sagittaria montevidensis Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa Eight miles north of Colusa Comment
  CAS-BOT-BC445795  Sagittaria montevidensis Milo S. Baker 1946-9-5 11632 Colusa Along Hiwy. between Colusa and Williams Comment
  CHSC78976  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge. 15 Comment
  CHSC78977  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9976 Colusa Sacremento National Wildlife Refuge. 18 Comment
  CHSC62849  Salix breweri Vernon H. Oswald; Lowell Ahart 1994-3-23 6016 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section of the E side of Frenzel Creek, S of Stonyford. 518 Comment
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  UC1356325  Salix breweri Theodore J. Crovello 1965-4-26 686 Colusa along Bartlett Springs Rd. 2.5 mi w junction with Bear Valley Road Comment
  UCD163647  Salix breweri Craig Thomsen 1998-6-19 1943 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  UCD57307  Salix breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3678 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  UCD41161  Salix exigua N. Williams 2002-3-28 148 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  CAS-BOT-BC107838  Salix gooddingii Roxana Stinchfield 1916-7-7 397 Colusa Sycamore slough near Sycamore Comment
  CAS-BOT-BC107841  Salix gooddingii Alice Eastwood 1921-4-11 10237 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CDA39532  Salix gooddingii G. D. Barbe 1975-6-4 2008 Colusa North of boat ramp, Colusa State Recreation Area. 0 Comment
  UCD111125  Salix laevigata G. F. Hrusa 1996-2-26 12631 Colusa Approx. 5 m. NW of Hwy. 20 along Leesville Rd. W of Oat Valley at S end of Boxer Valley. 200 Comment
  UCD164155  Salix laevigata Craig Thomsen 1999-4-27 2000 Colusa southern Bear Valley. Comment
  UCD81258  Salix laevigata Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5423 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
  UCR198150  Salix laevigata Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3677 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  UCR206356  Salix laevigata George K. Helmkamp, E. A. Helmkamp 2009-3-11 14380 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  UCR243136  Salix laevigata G. Robinson 1984-4-21 8 Colusa Inner North Coast Range, Bear Valley, 3.3 miles north of Hwy 20, about 80-90 m west of Wilbur Springs Rd. 390 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
  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
  UC1179060  Salix lasiolepis Herbert L. Mason 1947-3-29 13161 Colusa ca. 3 mi ne Colusa; Butte Sink, Butte Creek Comment
  UCD111628  Salix lasiolepis G. F. Hrusa 1996-2-26 12633 Colusa On margin of Little Stony Creek approx. 2 m. beyond intersection of Goat Mtn. Rd. and Stonyford-Lodoga Rd. 475 Comment
  UCD111629  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Little Stony Creek, Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. 475 Comment
  UCD163850  Salix lasiolepis Craig D. Thomsen 2000-6-7 2367 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  CAS-BOT-BC107365  Salix lasiolepis var. lasiolepis Roxana S. Ferris 1917-4-17 631 Colusa near Sycamore Comment
  JEPS80820  Salix melanopsis L. R. Heckard and J. C. Hickman 1981-7-31 5791 Colusa e side Snow Mt. (<along> Dark Hollow Creek) 1584 Comment
  CDA5812  Salpichroa origanifolia Agricultural Commissioner 1960-3-29 Colusa 0 Comment
  CDA20233  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; 5th St and Hillgate Rd, Arbuckle, just E of Hwy 5 behind Shell Stn on RR tracks. 42 Comment
  CDA20232  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. Area mostly S. tragus. 0 Comment
  CHSC78978  Salsola soda Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9978 Colusa Delevan National Wildlife Refuge. Adjecent to the main refuge road 0.2 mi north of Maxwell-Colusa Rd. 18 Comment
  CHSC94970  Salsola soda Lowell Ahart 2006-9-26 13348 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
  JEPS110510  Salsola soda Lowell Ahart 2006-9-26 13348 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  CAS-BOT-BC176899  Salsola tragus Roxana Stinchfield 1916-7-8 369 Colusa Sycamore Slough Road Comment
  CDA12015  Salvia columbariae G. F. Hrusa 1990-4-8 7667 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. 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
  CHSC79524  Salvia columbariae B. Castro; L. P. Janeway 2000-5-4 1137 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC596149  Salvia columbariae R. F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  HSC85862  Salvia columbariae R. Earing, C. Cavanaugh, C. Collins 1987-4-12 86 Colusa Leesville Grade 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
  JEPS75867  Sambucus mexicana L. R. Heckard 1974-9-10 3881 Colusa East Circle Trail Snow Mt. (at base of ne-facing rocky cliff along spur running se from west peak) 2011 Comment
  RSA60351  Sambucus mexicana G. R. Campbell 1948-6-18 652 Colusa 2 miles south of Wilbur Springs Comment
  UC2029557  Sanicula bipinnata Richard R. Halse 2013-3-26 8741 Colusa Along the Leesville Road ca. 8.3 miles northwest of its junction with State Highway 20 west of Williams, or 4.8 miles southeast of the junction with Bear Valley Road Comment
  CAS-BOT-BC223208  Sanicula bipinnatifida Roxana S. Ferris 1917-4-14 589 Colusa 5 mi west of Arbuckle, Arbuckle-Rumsey Road Comment
  UCD146697  Sanicula graveolens G. F. Hrusa 1998-6-19 14633 Colusa on NE side of Goat Mountain. 1710 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
  UCR206666  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-17 14390 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  HSC79767  Schoenoplectus acutus var. occidentalis E. Parreno 1968-3-29 45 Colusa Below turnoff on Hwy. 20, 1 mi. W of intersection of Hwy. 20 and Hwy. 16 Comment
  RSA530101A  Schoenoplectus glaucus D. W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles north of Ware Road 24 Comment
  SEINET9769686 Image available Schoenoplectus tabernaemontani Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  CHSC94324  Scirpus diffusus Lowell Ahart 2006-7-25 13062 Colusa In the west part of a large wet meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1569 Comment
  UC1100902  Scirpus maritimus Malcolm A. Nobs, S. Galen Smith 1949-9-9 1872 Colusa rice fields 3 mi w Williams; w of Williams Comment
  UC1100922  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12975 Colusa pond 2.7 mi n of Colusa between Sacramento River and Butte Creek; Butte Sink, n of Colusa betw Sacramento River and Butte Cree Comment
  CHSC62952  Scribneria bolanderi Vernon H. Oswald; Lowell Ahart 1994-4-6 6059 Colusa Goat Mtn. Rd. 0.8 mi SW of Digger Pine Flat, S of Stonyford. Flat bordering the road. 481 Comment
  POM21047  Scrophularia californica Roxana Stinchfield 1916-6-18 305 Colusa Timber near College City Comment
  JEPS80261  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-15 5441 Colusa n of road at Summit Springs; Snow Mountain, Summit Springs 1524 Comment
  JEPS83803  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
  UCD66927  Scutellaria californica Craig D. Thomsen; G. Harrington 2008-7-6 2770 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
  UCD66954  Scutellaria californica Ellen Dean; Davis Botanical Society 2008-5-31 4998 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD82582  Scutellaria californica Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2727 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 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
  UC71637  Scutellaria tuberosa Miss Alice King 1905-1 Colusa College City Comment
  UCD125753  Scutellaria tuberosa Kim E. Steiner 1978-4-29 195 Colusa on southwest-facing slope, Walker Ridge Rd., 1.5 mi N of State Hwy 20. 777 Comment
  CAS-BOT-BC417046  Sedella pentandra Herbert L. Mason 1953-5-4 s.n. Colusa Little Stony Creek road 0.25 miles above junction of Little Stony Creek and Trout Creek,Inner North Coast Ranges 609 Comment
  RSA114112  Sedella pentandra H. L. Mason 1953-5-4 s.n. Colusa Little Stony Creek Road 0.25 miles above junction of Little Stony Creek and Trout Creek, Inner North Coast Ranges. 610 Comment
  UCD82734  Senecio aronicoides Craig Thomsen; G. Harrington 2009-5-14 2915 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. 762 Comment
  POM174569  Senecio eurycephalus Roxana S. Ferris 1926-4-23 6454 Colusa Stonyford Comment
  JEPS110106  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  CDA32942  Senecio vulgaris Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  CHSC94402  Setaria viridis Lowell Ahart 2006-8-9 13137 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC70984  Sidalcea diploscypha Vernon Oswald; Lowell Ahart 1998-5-7 9003 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
  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
  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
  UCR52397  Sidalcea diploscypha N. Williams, Terry Hines, Ellen Purcell 1988-4-16 53 Colusa 2 mi W on Brim Rd. from Bear Valley Rd. intersection 518 Comment
  CHSC79771  Sidalcea keckii L. P. Janeway; B. Castro 2000-5-3 6700 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 396 Comment
Read comments
Mar 15 2011
  UC584175  Sidalcea keckii J. Clausen 1935-5-20 1013 Colusa on Bartlett Springs road 18 mi w Williams; w of Williams Comment
  JEPS80800  Sidalcea oregana subsp. hydrophila L. R. Heckard and J. C. Hickman 1981-7-30 5770 Colusa along Trout Creek (se side of Snow Mt.); , along Trout Creek 1600 Comment
  POM914478  Silene californica L. S. Rose 1936-4-27 36179 Colusa 11 miles NW of Rumsey. 305 Comment
  UC1299502  Silene campanulata Freed W. Hoffman 1947-6-19 1674 Colusa Cooks Springs North Coast Ranges, Cooks Springs Comment
  CDA12223  Silene campanulata subsp. glandulosa G. F. Hrusa 1993-5-2 10861 Colusa Frenzel Creek Research Natural Area; Mid-canyon of Frenzel Creek, tributary of Little Stony Creek. 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
  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
  RSA0060081  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles west northwest of its junction with State Hwy. 20. 378 Comment
  UCD163877  Silene lemmonii Craig D. Thomsen 2000-4-12 2525 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  CHSC32220  Silene verecunda James Jokerst 1980-8-6 1053 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. 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
  CHSC112272  Sisyrinchium bellum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18644 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  RSA0115083  Sisyrinchium bellum Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18644 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  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
  HSC59568  Sisyrinchium bellum Rick Lundquist 1979-4-14 22 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  JEPS80060  Smilacina racemosa L. R. Heckard with J. Hickman 1979-6-15 5059 Colusa saddle trail between east peak and west peak Snow Mt 2103 Comment
  POM62090  Solanum americanum Roxana Stinchfield 1916-7-7 385 Colusa Sycamore Slough bed. Stinchfield Ranch. Comment
  CHSC63425  Solanum elaeagnifolium Vernon H. Oswald 1994-7-18 6411 Colusa Near the S boundary of the Sacramento National Wildlife Refuge located S of Willows, on the S side of Cell 3 of Pool 11 bordering Hunters Creek. Along a levee road. 21 Comment
  CHSC114061  Solanum parishii Richard R. Halse 2012-3-29 8456 Colusa Along State Hwy. 20 ca. 6.8 miles northeast of its junction with State Hwy16 176 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
  HSC31629  Solanum parishii Glenn McGourty 1974-4-20 14 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
  HSC41848  Solanum parishii N. G. Sugihara 1977-4-24 38 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  HSC62930  Solanum parishii Kenneth Clark 1979-4-14 103 Colusa Bear Valley Rd. 3.9 mi. N of State Rte. 20 412 Comment
  SEINET6185643  Solanum parishii R. R. Halse 2012-3-29 8456 Colusa Along State HWY 20 about 6.8 miles northeast of its junction with State HWY 16 176 Comment
  UCD57555  Solanum parishii Andrew Pedersen; 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. 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, at confluence with Craig Creek. 304 Comment
  CAS-BOT-BC35921  Solanum umbelliferum Roxana S. Ferris 1926-4-23 6591 Colusa Near Stonyford. Comment
  CHSC101399  Solidago elongata David Isle 2001-7-26 1576 Colusa SW side of Letts Lake; N of day use area; N of trail between swamp thistle and tule patch. 1377 Comment
  CHSC117781  Solidago velutina subsp. sparsiflora David Isle; Terril Wolt 2016-7-15 2168 Colusa North Coast Range:~5 1/2 miles W of Stonyford off S side Fouts Springs Rd M10 (18N01.2). Also ~5/8 mile SE of M10 Jct. w/ Trough Sp R Rd M5 (18N07.1) Fouts Spring California. 609 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
  UCR238926  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2012-2-9 18531 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  UC1100454  Sorghum halepense Herbert L. Mason 1945-9-10 12723 Colusa 1 mi. n. Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Sacramento R. Comment
  UCD92752  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  UCR206354  Spergularia George K. Helmkamp, E. A. Helmkamp 2009-3-11 14382 Colusa Sacramento Valley, along CA-20, 0.1 mile east of its junction with I-5, north end of Williams 49 Comment
  CAS-BOT-BC390067  Spergularia atrosperma Roxana S. Ferris 1917-4-12 509 Colusa 4 miles East of Williams Comment
  CHSC53948  Spergularia marina Vernon H. Oswald 1991-4-21 4525 Colusa Two Mile Rd, 3.7 mi south of Maxwell Colusa Rd. On a flat along edge of road through rice fields. 27 Comment
  CHSC79491  Spergularia marina L. P. Janeway; B. Castro 2000-3-23 6634 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  SEINET8883999  Spergularia marina R. R. Halse 2012-3-28 8455 Colusa Williams, along 5th Street between intersections with C and D Streets, near railroad tracks. 24 Comment
  CAS-BOT-BC390764  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  JEPS89204  Sphenosciadium capitellatum L. R. Heckard and J. C. Hickman 1981-7-31 5793 Colusa e side Snow Mt. (Dark Hollow Creek); e side of Snow Mt., Dark Hollow Creek 1584 Comment
  CDA32689  Sporobolus cryptandrus Howard Johnson 1958-12-14 Colusa Arbuckle, Howard Johnson Property, Route 1, Box 91 0 Comment
  SEINET9361561  Stachys ajugoides var. ajugoides Unknown 1999-8-18 15241 Colusa Bear Valley Comment
  CHSC80392  Stachys ajugoides var. rigida Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  CHSC94290  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13091 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110059  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS75731  Stachys ajugoides var. rigida L. R. Heckard 1974-9-9 3869 Colusa se Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  CHSC71433  Stachys albens Vernon H. Oswald; Lowell Ahart 1998-7-15 9268 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  CHSC88559  Stachys albens L. P. Janeway 2001-6-6 7116 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 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
  UCD164144  Stachys albens Craig Thomsen 1997-6-21 1933 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  UCD55468  Stachys albens Ellen Dean; Gordon Harrington 2006-10-6 3288 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
  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
  RSA0109095  Stachys pycnantha L. Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UCD66928  Stachys stricta Craig D. Thomsen; G. Harrington 2008-7-6 2772 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
  UCR200673  Stachys stricta Craig D. Thomsen 2006-8-17 2712 Colusa BLM Payne Ranch, c. 30 feet east of Hwy 16, 0.5 mi. south of intersection between Hwy 16 and Hwy 20 300 Comment
  SEINET10836144  Stapfia colusana Davy 1898-5-26 DAVY s.n. Colusa Near Princeton, on road to Norman Comment
  UC72583  Stellaria media Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC62930  Stellaria nitens Vernon H. Oswald; Lowell Ahart 1994-4-6 6072 Colusa Goat Mtn. Rd. 0.8 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. On the edge of the road. 487 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
  CDA15548  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa North Coast Ranges; Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 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
  RSA703243  Stephanomeria virgata subsp. pleurocarpa L. Ahart 2004-10-4 11424 Colusa On the east side of Leesville Road, about 4.7 miles by road SE of the intersection of Bear Valley Road, Leesville Ladoga road and Leesville Road, NE of Bear Valley. 370 Comment
  UCD146707  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 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
  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
  UCD72374  Streptanthus batrachopus A. M. Shapiro 1988-6-6 s.n. Colusa Goat Mountain Road. 762 Comment
  SEINET11993713  Streptanthus breweri Unknown 1985-1 50459 Colusa W of Williams, Bear Valley, on Bear Valley Rd about 1 mi from its origina at Rt. 20 366 Comment
  UCD73921  Streptanthus breweri G. Ledyard Stebbins 1966-6-6 6431 Colusa Above Frenzel Creek, on slopes of Lovelady Ridge. 609 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
  UC1051693  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-18 4256 Colusa Candy Bucket Spring Inner North Coast Ranges, Mendocino National Forest (road from Stoneyford to Mill Spring) 609 Comment
  UC956511  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-19 1021 Colusa Cook Springs Comment
  UCD57659  Streptanthus breweri var. breweri Madeline Christopher; 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. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. 335 Comment
  CAS-BOT-BC87027  Streptanthus drepanoides Volney Rattan 1884-1-1 s.n. Colusa Above Fouts Springs. Comment
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Jul 24 2018
  CHSC25074  Streptanthus glandulosus D. Joley 1968-3-30 Colusa On Hwy 20 10 mi w of Williams. Comment