Search Results — 2000 specimen records retrieved (1626 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
  HSC5007  Abies concolor J. O. Sawyer 1968-10-12 756 Colusa Colusa/Lake Co. line, Snow Mtn., boundary N of Clear Lake and W of Stony Ford 2134 Comment
  CHSC46859  Acer macrophyllum Vernon Oswald 1989-9-12 4007 Colusa Goat Mtn Rd 3.0 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. 426 Comment
  CAS-BOT-BC334176  Acer negundo var. californicum Roxana S. Ferris 1926-4-22 6301 Colusa near Sycamore Comment
  CAS-BOT-BC334177  Acer negundo var. californicum Roxana S. Ferris 1917-4-17 618 Colusa Sycamore Slough Comment
  CAS-BOT-BC334174  Acer negundo var. californicum Alice Eastwood 1921-4-11 10245 Colusa Colusa 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
  UCR205146  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14252 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD50713  Achnatherum lemmonii Beecher Crampton 1958-5-19 4799 Colusa 5.8 miles south of Lodoga, Colusa County. Comment
  CAS-BOT-BC29877  Achyrachaena mollis B. Ellyson; J. Hooke; D. Newman 1996-5-4 40 Colusa Bear Valley, Leesville, 1.3 mi. south fo Brim Road on Bear Valley Road; 14.7 mi. on Walker Ridge Road 414 Comment
  JEPS36738  Achyrachaena mollis W. L. Jepson 1932-5-8 16285 Colusa Stonyford 365 Comment
  SEINET7062980  Achyrachaena mollis 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
  UCD64421  Achyrachaena mollis Craig D. Thomsen 2000-4-28 2177 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
  UCD64428  Achyrachaena mollis Craig D. Thomsen 2000-4-28 2204 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
  HSC92504  Achyrachaena mollis J. Cromwell, Julie Schneider, A. Thoele 1994-4-23 45 Colusa Bear Valley, along Bear Valley Rd,. approx. 1.3 miles south of junction with Bartlett Springs Rd. 409 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
  CHSC30000  Acmispon brachycarpus John Griffith 1980-4-6 9 Colusa Ca. 6 mi s of Stonyford. 405 Comment
  CHSC79733  Acmispon brachycarpus L. P. Janeway; B. Castro 2000-5-3 6699 Colusa Vicinity of Antelope Creek and Grapevine Creek. 426 Comment
  UCD163235  Acmispon brachycarpus Craig D. Thomsen 2000-4-28 2250 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
  UCD64282  Acmispon brachycarpus Craig D. Thomsen 2000-3-31 2098 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
  UCD66693  Acmispon brachycarpus Craig D. Thomsen 2000-6-23 2376 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
  UCSB63635  Acmispon brachycarpus Fukuyama, S. 1986-4-5 Colusa Ca 0.3 mi w of jjct of Hwys 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 321 Comment
  CHSC101628  Acmispon denticulatus David W. Isle; Teal Richards 2002-4-18 1653 Colusa Mendocino National Forest; N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg Study Plot. MDB and M. 524 Comment
  UCD66677  Acmispon denticulatus Craig D. Thomsen 2000-5-11 2290 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  HSC94147  Acmispon grandiflorus G. Fred Hrusa 1998-6-19 14638 Colusa Below Fouts Springs on Fouts Springs Rd. to Stonyford. 675 Comment
  CHSC52808  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 Comment
  SD131846  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road. 1128 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
  UCR261747  Acmispon rubriflorus Ann Howald 2003-6-9 2369 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd, then c. 0.1 mile east on ranch road 397 Comment
  CHSC79739  Acmispon wrangelianus L. P. Janeway; B. Castro 2000-5-2 6692 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  HSC97663  Acmispon wrangelianus J. Marshall, J. Savage, L. Allison 1997-3-30 11 Colusa Mt. Diablo Meridian, 1.6 mi. E of Brim Rd., Walker Ridge intersection. 457 Comment
  CAS-BOT-BC29713  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CAS-BOT-BC29714  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CHSC1534  Adenostoma fasciculatum V. Holt 1935-5-12 Colusa Near Stonyford. 335 Comment
  UCD84556  Adenostoma fasciculatum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6081 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  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
  UCD56913  Adiantum jordanii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3516 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  CDA4021  Aeschynomene rudis June McCaskill, J. Hill 1990-8-27 s.n. Colusa Near 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
  SFV15096  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
  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
  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
  HSC66736  Aesculus californica J. P. Smith, J. O. Sawyer 1973-4-30 6365 Colusa Along Hwy. 20, 10.1 mi. W of Hwy. 5 at Williams Comment
  HSC86927  Aesculus californica Anthony J. Desch, Bryon Cariss 1988-4-16 33 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  CHSC48483  Agastache urticifolia Vernon Oswald 1984-7-20 1613 Colusa Near the Lily Pond n of Letts Lake in Mendocino Nat. Forest. 1280 Comment
  JEPS75862  Ageratina occidentalis L. R. Heckard 1974-9-10 3887 Colusa s of East Peak (along intermittent spring of upper reaches of Dark Hollow Creek); Snow Mt., Dark Hollow Creek 2011 Comment
  UCD57716  Agoseris grandiflora Jordan Thompson; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. North side of Craig Creek on south side of unimproved road. 335 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
  UCD162984  Agoseris heterophylla Craig D. Thomsen 2002-4-4 2582 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
  UCD56676  Agoseris heterophylla Jack Alderson 2007-3-25 12 Colusa BLM Payne Ranch. Destanella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  JEPS75879  Agrostis alba L. R. Heckard 1974-9-9 3873 Colusa meadowy area around spring and small stream just ne reocky promontory southeast of Foutch Camp; Snow Mt. 1798 Comment
  CHSC94532  Agrostis avenacea Lowell Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725021  Agrostis avenacea L. Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD51776  Agrostis avenacea Beecher Crampton 1958-5-19 4822 Colusa along US Hwy. 99W, about 3 miles south of Maxwell. Comment
  UCD51793  Agrostis avenacea Beecher Crampton 1958-6-27 4985 Colusa 5 miles south of Colusa. Comment
  UCD51802  Agrostis avenacea Beecher Crampton 1963-8-5 6871 Colusa 3/4 mile E of Cortena, Lurline Road. Comment
  JEPS110433  Agrostis exarata Lowell Ahart 2006-8-9 13167 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCSB63779  Agrostis exarata Oswald, Vernon; Ahart, Lowell 1998-7-15 Colusa Bartlett Springs Rd; 1.6 mi W of Bear Valley Rd; T15N R5W Sect 7 487 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
  UC985647  Alisma lanceolatum Herbert L. Mason and Verne Grant 1946-9-5 13119 Colusa 1.6 mi w Williams (road to Lake County) Comment
  CAS-BOT-BC445318  Alisma lanceolatum Milo S. Baker 1946-9-5 11631 Colusa Along Hiwy. bet. Colusa and Williams Comment
  UCD137914  Alisma lanceolatum Herbert L. Mason 1946-9-5 13119 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  UCD57115  Allium Gordon Harrington; Diana Hickson 2007-4-7 0019 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  CAS-BOT-BC459583  Allium amplectens Katherine Esau 1934-5-5 s.n. Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  JEPS56351  Allium amplectens W. L. Jepson 1932-5-8 16272 Colusa Lodoga 457 Comment
  JEPS73487  Allium amplectens L. R. Heckard 1972-7-9 3099 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2072 Comment
  UCD138480  Allium amplectens G. L. Stebbins Jr. 1962-5-6 6024 Colusa along Highway No. 20, on south bank of Bear Creek, between Williams and Lower Lake, south of Wilbur Springs. 457 Comment
  UCD82390  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2832 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
  CAS-BOT-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford Comment
  UCD138458  Allium cratericola Louis K.; Pat Mann 1961-4-2 s.n. Colusa Bear Valley. 396 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
  UCD82517  Allium falcifolium Craig Thomsen; G. Harrington 2009-5-12 2875 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCD141855  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  CAS-BOT-BC135885  Allium fimbriatum subsp. purdyi A. A. Heller 1940-5-6 15579 Colusa Summit of the grade on State Highway #20, at the Lake County line. 232 Comment
  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-BC135891  Allium fimbriatum subsp. purdyi Lewis S. Rose 1936-4-27 36194 Colusa 22 mi. SW of Williams, Lake Co. - Colusa Co. boundary. 396 Comment
  JEPS120995  Allium fimbriatum var. purdyi Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  POM215800  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa/Lake Co. Line west of Wilbur Springs 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
  UCR198151  Allium fimbriatum var. purdyi Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3663 Colusa BLM Payne Ranch, Craig Canyon, west of Hwy 16, c. 2 road mi south of junction of Hwy 20 and Hwy 16. Along unimproved road 329 Comment
  SEINET3884489  Allium fimbriatum var. purdyi D. W. McNeal 1977-5-18 2028 Colusa On a hillside above a small stream beside Hwy. #20, 0.9 mi. w. of the jct. of Hwy. #16.; 0 Comment
  SEINET3884500  Allium fimbriatum var. purdyi Thomas Nelson, Jane P. Nelson 1978-4-30 3972 Colusa State Route 20 just east of Colusa-Lake county line.; 0 549 Comment
  SEINET3878782  Allium sanbornii var. jepsonii James Payne Smith Jr 1978-4-22 9744 Colusa Wilbur Springs Quadrangle. Bear Valley Road, 1.2 miles from its junction with State Route 20.; 0 411 Comment
  CHSC2063  Allium serra D. Smith 1935-5-12 Colusa Stonyford Hills. Comment
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CAS-BOT-BC475542  Allium serra Roxana S. Ferris 1926-4-23 6584 Colusa Field 2 miles from Stonyford Comment
  CAS-BOT-BC475543  Allium serra Roxana S. Ferris 1917-4-14 557 Colusa Foothills 7 miles west of Arbuckle Comment
  CAS-BOT-BC475545  Allium serra Lewis S. Rose 1936-4-27 36181 Colusa 11 miles NW of Rumsey 411 Comment
  CAS-BOT-BC475548  Allium serra H. C. Cantelow 1936-4-11 1184 Colusa Bear Creek Canyon Comment
  UCD141815  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mile toward Clear Lake from junction of California Highway # 16 and # 20. Comment
  UCD141828  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa along road 3.2 miles past junction of California 16 and 20, toward Rumsey, SW part of county. Comment
  UCD15285  Allium serra Claire Warshaw 1985-4-13 9 Colusa along Bear Valley Road, 8 miles northwest from intersection with highway 20; 390 Comment
  UC1051499  Allophyllum divaricatum Helen K. Sharsmith 1953-6-19 4280 Colusa 1 mi. n. Trough Springs (on Trough Springs Ridge); Inner N. Coast Ranges, Mendocino Nat'l Forest, Trough Spring 914 Comment
  CHSC36827  Allophyllum gilioides B. Castro 1982-3-27 3 Colusa On roadcut on n side of Hwy 20 at Salt Canyon, n side of Salt Ck, 11 mi wsw of Williams. 143 Comment
  HSC44459  Allophyllum gilioides R. York 1978-4-22 129 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD82489  Allophyllum gilioides Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5675 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
  JEPS72 Image available Allophyllum gilioides subsp. gilioides W. L. Jepson 1932-5-7 16271 Colusa Lodoga; ; Lodoga, Colusa Co. 518 Comment
  SEINET3872990  Allophyllum gilioides subsp. violaceum Richard R. Halse 2010-3-25 7849 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
  CHSC94310  Alnus rhombifolia Lowell Ahart 2006-8-9 13108 Colusa Gravel bar on the north side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  SEINET10510969  Alopecurus californicus Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles E of Williams. Alkali Plains. Comment
  CHSC85730  Alopecurus saccatus G. F. Hrusa; K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges. Along N side of Leesville Rd. approx. 4 m. NW of Hwy. 20. 290 Comment
  CHSC112624  Amaranthus californicus Lowell Ahart 2013-10-1 19089 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
  CHSC84970  Amaranthus californicus Lowell Ahart 2003-10-23 10658 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS120702  Amaranthus californicus Lowell Ahart 2013-10-1 19089 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
  UC1191392  Amaranthus californicus Herbert L. Mason and Verne Grant 1946-8-6 12968 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink 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
  RSA718532  Ambrosia psilostachya L. Ahart 2006-10-31 13518 Colusa 20 yards northeast of the bridge across Stony creek, just north of Stonyford. 348 Comment
  CDA20509  Ambrosia psilostachya D. Isle 2004-11-17 DI 2 -04 Colusa Northwestern California; Just N of Stony Creek, N of Stonyford and S of the Glenn county line. 344 Comment
  SBBG50561  Amelanchier utahensis B. Hutmacher 1973-4-21 10 Colusa St Hwy 20, Bear Valley near Bear River 1524 Comment
  CHSC84957  Ammannia coccinea Lowell Ahart 2003-10-23 10673 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS110091  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
  CHSC30012  Amsinckia intermedia John Griffith 1980-4-16 1 Colusa Ca. 7 mi s of Stonyford. 402 Comment
  SFV3062  Amsinckia intermedia D. West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highways 16 and 20. 244 Comment
  JEPS102235  Amsinckia lunaris L. P. Janeway 2001-4-18 7024 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 274 Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  UCD80836  Amsinckia lunaris Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5293 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Ridge between Brophy Canyon and the canyon to its north. 366 Comment
  CHSC60660  Amsinckia lycopsoides Vernon H. Oswald 1993-4-14 5267 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. Along the edge of the levee road along the S leg of the tour route. 18 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
  CHSC101640  Ancistrocarphus filagineus David W. Isle 2002-4-18 1658 Colusa Mendocino National Forest. N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trailhead. Edge of E-flowing ephemeral drainage. MDB and M. In chamise site burned in 8/8/01 Trough Fire and part of Helicopter Hydromulch Study Plot. 524 Comment
  CHSC112258  Ancistrocarphus filagineus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18626 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
  HSC48170  Ancistrocarphus filagineus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3934 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS16206  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (w of base of grade to Indian Valley (Bartlett Mt. Road)) Bear Valley; Inner North Coast Ranges, Indian Valley, Bear Valley Comment
  UCD163684  Ancistrocarphus filagineus Craig Thomsen 1999-4-15 1985 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CHSC79806  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2000-5-2 6693 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  CHSC32214  Antennaria geyeri James Jokerst 1980-8-6 1060 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  SD22373  Anthemis cotula Richard Neil 1938-6-20 Colusa Grimes Comment
  UCD163218  Anthemis cotula Craig D. Thomsen 2000-5-11 2325 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CAS-BOT-BC237912  Antirrhinum subcordatum Rattan 1940-6-7 s.n. Colusa On the ridge east of Lodogo. On Stony Creek, not far from this station Comment
  CAS-BOT-BC27017  Antirrhinum subcordatum Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N. of San Francisco Bay. Stony Cr. Comment
  CHSC111700  Antirrhinum subcordatum David Isle; F. Thomas Griggs 1979-5-23 2064 Colusa Little Stony Creek Watershed. 1/5 mile W of Goat Mtn. Rd/Lodoga Rd. Jct. on N side of Goat Mtn. Rd. Near I-7 fire pre-attack triangular sign on T-post. (Just past Ruby King Mine and small eph. drainage that joins Little Stony Creek from N. 414 Comment
  CHSC84191  Antirrhinum vexillo-calyculatum subsp. intermedium Lowell Ahart 2003-7-14 10388 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  CHSC94710  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  JEPS127573  Antirrhinum virga David Isle 2015-6-20 2155 Colusa North Coast Ranges: ~3.75 miles W of Stonyford and ~100 yards S of road 18N01; S of Bob Angulo mobile hone; on E edge of old 4x4 road/firebreak in chaparral. (Gilmore Peak 7.5' Quad.) 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
  CHSC62836  Apiastrum angustifolium Vernon H. Oswald; Lowell Ahart 1994-3-23 6017 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. 505 Comment
  JEPS87723  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  CAS-BOT-BC392020  Aquilegia eximia G. L. Stebbins 1972-6-25 9000 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  JEPS80780  Arceuthobium abietinum L. R. Heckard and J. C. Hickman 1981-7-30 5753 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1600 Comment
  CHSC28034  Arceuthobium campylopodum J. D. Jokerst 1979-3-24 180 Colusa Comment
  SEINET3239841  Arceuthobium occidentale R. L. Mathiasen 2009-1 2009 -21 Colusa 3.2 km E of Summit County line at vista point on St. Rte. 20. 400 Comment
  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
  HSC96816  Arctostaphylos canescens subsp. canescens J. Carey, A. Hong, J. Leffingwell 1995-4-1 24 Colusa Walker Ridge Rd., 4.8 mi. N of its junction with Indian Valley Access Rd. 976 Comment
  JEPS73507  Arctostaphylos canescens subsp. canescens L. R. Heckard 1972-7-10 3124 Colusa on trail to Box Spring e Trout Creek crossing (Snow Mt.); , e of Trout Creek crossing on trail to Box Spring 1828 Comment
  UCD51022  Arctostaphylos glandulosa var. glandulosa G. L. Webster 1989-5-6 4699 Colusa Near border with Lake County; on Walker Ridge, near Cold Spring Mountain. Comment
  CAS-BOT-BC240291  Arctostaphylos manzanita Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6080 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  UCD52157  Arctostaphylos manzanita G. F. Hrusa 1989-2-7 5807 Colusa Road to Cedar Mtn., along Little Stony Creek, approx. 3 miles above junction with Stonyford-Lodoga Rd. 425 Comment
  CHSC79496  Arctostaphylos manzanita subsp. elegans L. P. Janeway 2000-5-31 6773 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. 884 Comment
  HSC7627  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa Road between Upper and Lower Letts Valleys 1220 Comment
  CAS-BOT-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-BC24423  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-9 s.n. Colusa Hershey, se. Colusa Co. Comment
  CAS-BOT-BC24424  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-16 s.n. Colusa Hershey, se. Colusa Co. Comment
  SD247411  Arctostaphylos manzanita subsp. manzanita Ann Howald 2003-3-11 2278 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, peninsula ca. 2.2 miles north of Lodoga (Lodoga 7.5'Q) 365 Comment
  UCR261618  Arctostaphylos manzanita subsp. manzanita Ann Howald 2003-3-11 2278 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2.2 miles north of Lodoga 365 Comment
  UCD163861  Arctostaphylos viscida Craig D. Thomsen 2001-5-31 2543 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD52469  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  UCD66999  Arctostaphylos viscida Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  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
  UCD58104  Arctostaphylos viscida subsp. pulchella Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3351 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 536 Comment
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  SBBG114895  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Colusa Brim Rd 396 Comment
Read comments
Dec 10 2014
  JEPS81416  Arenaria congesta var. crassula L. R. Heckard and J. C. Hickman 1982-7-9 6024 Colusa Goat Mt Goat Mt. (just east of Lookout) 1859 Comment
  UC1053477  Argemone rotundata Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3178 Colusa just w of base of the grade to Indian Valley (Bartlett Mountain Road), just w of Bear Valley, Inner North Coast Ranges Indian Valley; Inner North Coast Ranges Comment
  UC624278  Argemone rotundata L. Constance 1939-5-14 2490 Colusa 1 mi e of Mill Creek Ranger Station (Inner North Coast Ranges); Inner North Coast Ranges 548 Comment
  CHSC86865  Aristida ternipes var. hamulosa B. Castro 2003-3-28 1405 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 182 Comment
  UCD146598  Arnica discoidea G. F. Hrusa 1998-6-19 14615 Colusa North Coast Ranges. USFS Pacific Ridge Road, 4-5 km northwest of intersecion with Colus County Goat Mountain Road. 1200 Comment
  UCD66961  Arnica discoidea Ellen Dean; Davis Botanical Society 2008-5-31 5005 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1152 Comment
  CAS-BOT-BC90262  Artemisia douglasiana J. H. Thomas 1960-8-30 8862 Colusa About 2.4 miles NW of Sycamore on road to Colusa Comment
  CHSC84932  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  IRVC29848  Artemisia douglasiana Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4994 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  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
  RSA718056  Artemisia douglasiana L. Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 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
  UC971989  Asclepias cordifolia Herbert L. Mason 1952-6-19 14302 Colusa Black Diamond Ridge Mendocino National Forest 822 Comment
  HSC87000  Asclepias cordifolia Brent Helm, Curtis Miller, Mark Steiger 1988-4-16 73 Colusa 3.7 mi. W on Goat Mtn. Rd., off of Lodoga-Stonyford Rd. 452 Comment
  CHSC32203  Asclepias fascicularis James Jokerst 1980-8-7 1072 Colusa North Coast Ranges. Near Snow Mountain (east). Comment
  JEPS93867  Asclepias fascicularis Vernon H. Oswald and Lowell Ahart 1998-7-15 9266 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UCD72531  Asclepias fascicularis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3822 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, ca. 0.5 mile downstream of bridge. 246 Comment
  HSC72214  Asclepias solanoana Thomas W. Nelson, Jane P. Nelson 1980-6-24 5876 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  UC424842  Asclepias solanoana Milo S. Baker 1929-6-30 3472 b Colusa Snow Mt. Trail to Summit Springs (at Cedar Creek); Snow Mt., Cedar Creek Comment
  JEPS95651  Asclepias speciosa Vernon H. Oswald and L. Ahart 1999-6-18 9774 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate. From a colony growing along the edge of a roadside seep. 624 Comment
  UCD164137  Asclepias speciosa Craig Thomsen 2000-6-12 2364 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD58164  Asclepias speciosa Gordon Harrington 2007-5-15 54 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  CAS-BOT-BC478831  Asparagus officinalis Roxana Stinchfield 1918-7-11 464 Colusa Davis Tule near Sycamore Slough Comment
  JEPS95275  Aspidotis densa Vernon H. Oswald and Lowell Ahart 1994-3-23 6014 Colusa S of Stonyford (Frenzel Creek Research Natural Area, S side of Litte Stony Creek, in the section on the E side of creek) 518 Comment
  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
  CAS-BOT-BC178664  Astragalus clevelandii G. L. Stebbins 1972-6-25 8099 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  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
  UC71640  Astragalus gambelianus Miss Alice King 1905-1 Colusa College City Comment
  UCD163330  Astragalus gambelianus Craig D. Thomsen 2009-5-3 2799 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  UCSC0010466  Astragalus gambelianus Dylan M. Neubauer, Tim Forsell 2016-3-31 597 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  CAS-BOT-BC193115  Astragalus rattanii var. jepsonianus Alice Eastwood; John Thomas Howell 1938-5-16 5634 Colusa Lake - Colusa Co. line on road to Williams Comment
  CHSC112270  Astragalus rattanii var. jepsonianus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18634 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
  UC863114  Astragalus rattanii var. jepsonianus Alice Eastwood, John Thomas Howell 1938-5-16 5634 Colusa Lake--Colusa County line on road to Williams; road to Williams Comment
  UCD15422  Astragalus rattanii var. jepsonianus Margit Sands 1985-4-13 25 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
  UCD169731  Astragalus rattanii var. jepsonianus 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 Hwys. 20 and 53. 558 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
  UCD63037  Astragalus rattanii var. jepsonianus Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along unnamed tributary of Bear Creek. 322 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
  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
  SEINET4680474  Astragalus rattanii var. jepsonianus D. W. McNeal 1988-3-31 3237 Colusa On a hillside above Bear Valley Rd., 0.6 mi NW of Hwy #20.; 0 Comment
  JEPS80461  Athyrium filix-femina var. cyclosorum Alice Q. Howard 1972-7-10 Colusa trail from Fouts Camp to Box Springs (n side of ridge seaprating Trout and Paradise Creeks); Snow Mt 1676 Comment
  UCD64044  Athysanus pusillus Craig D. Thomsen 2000-3-8 2036 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
  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
  UC1609126  Atriplex coronata Vernon H. Oswald, Mike Wolder and Joe Silveira 1993-7-26 5701 Colusa ca 5 mi s Colusa (ca 1 mi n of Ware Rd., ca 1 mi w of Ohm Rd., Tract 18 on the s side of the Colusa National Wildlife Refuge); s side Colusa National Wildlife Refuge, s of Colusa 15 Comment
  CHSC61039  Atriplex depressa Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5703 Colusa Colusa National Wildlife Refuge. W side of Pool 3 on the S end of the refuge near Ohm Rd., ca. 2 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  JEPS90596  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
  RSA747234  Atriplex fruticulosa George K. Helmkamp, E. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UCD97461  Atriplex joaquinana A. A. Heller 1916-6-9 12394 Colusa near Williams. 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
  JEPS90603  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Road) 39 Comment
  UCD57056  Avena barbata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3644 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
  UCD66443  Avena fatua Craig D. Thomsen 2000-4-28 2212 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD66912  Avena fatua 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
  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
  RSA726847  Azolla filiculoides Lowell A. Ahart 2007-7-7 14260 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  CHSC46039  Azolla microphylla Lowell Ahart 1975-1-25 699 Colusa On the south side of Norman Road, about 1 mile west of Princeton. 30 Comment
  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
  CHSC98782  Baccharis salicifolia Richard R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. Along Salt Creek. 100 Comment
  HSC79084  Baccharis salicifolia C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 30 Colusa Mendocino National Forest, Digger Pine Campground, 10 miles SW of Stonyford via Lodoga-Stonyford and Goat Mtn. Rd. 457 Comment
  HSC87058  Baccharis salicifolia Pat Daly, Rudy Galindo 1988-4-16 53 Colusa 3.7 miles west on Goat Mountain Rd. off of Lodoga-Stonyford Rd. to Digger Pine Campground; Stony Creek, .5 mile from campground 452 Comment
  CAS-BOT-BC100067  Balsamorhiza macrolepis B. Castro; B. Corbin; K. Earll; L. Hanson; D. Isle; L. P. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and 716 Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  CDA396  Bassia hyssopifolia L. Ahart 2003-8-15 10509 Colusa On the south side oof Highway 20, about 1 mile southwest of Williams. 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
  UCD38965  Bassia hyssopifolia Beecher Crampton 1961-7-20 5934 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD97545  Bassia hyssopifolia Beecher Crampton 1963-8-3 6868 Colusa 1/4 mile east of Cortena. Comment
  HSC90794  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of E Park Reservoir N of Lodoga 366 Comment
  JEPS104404  Bergia texana Lowell Ahart 2003-10-23 10670 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
  UC1192266  Bergia texana Herbert L. Mason, Verne Grant 1946-8-6 12967 Colusa Pond 2.7 miles north of Colusa between Sacramento River and Butte Creek Comment
  RSA724819  Bidens frondosa L. Ahart 2006-9-26 13344 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
  POM288398  Blennosperma nanum Lyman Benson 1935-3-27 6332 Colusa 6 miles west of Williams. 213 Comment
  CAS-BOT-BC100260  Blennosperma nanum var. nanum Roxana S. Ferris 1917-4-12 498 Colusa 4 miles East of Williams 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
  CHSC117121  Boehmeria cylindrica B. Castro; Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  CHSC117123  Boehmeria cylindrica B. Castro; Tom Boullion 2009-8-24 1800 G-1 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  CDA38638  Boehmeria cylindrica Dave Brown 2012-9-12 PDR# 060 P06089084 Colusa Colusa; Sacramento River Recreation Area. 0 Comment
  CHSC84931  Bolboschoenus glaucus Lowell Ahart 2003-10-23 10672 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
  JEPS101904  Bolboschoenus glaucus Dean W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, along Ohm Road 39 Comment
  CHSC57146  Bolboschoenus maritimus K. R. Stern 1980-6-1 6641 Colusa Vernal pool, south-central border area of Colusa Wildlife Refuge. 45 Comment
  UC1100921  Bolboschoenus maritimus Herbert L. Mason, Verne Grant 1946-8-13 13013 Colusa on Williams highway by bridge two mi w Colusa (Butte Sink); , w of Colusa Comment
  CAS-BOT-BC322142  Bolboschoenus maritimus Peter Rubtzoff 1965-9-14 5651 Colusa 4.5 miles from Hwy. 20 on the road to Wilbur Springs. Comment
  UCD140026  Bolboschoenus maritimus subsp. paludosus P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Cortina. Comment
  UCR206539  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14313 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  JEPS108909  Brickellia californica Lowell Ahart 2006-8-9 13110 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  RSA718047  Brickellia californica L. Ahart 2006-8-9 13110 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of stonyford. 422 Comment
  JEPS80803  Brickellia grandiflora L. R. Heckard and J. C. Hickman 1981-7-30 5773 A Colusa at e summit of ridge running e of (about 1.7 km. air miles from) West Peak (Snow Mt); Snow Mt. 2042 Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  UCD82536  Briza maxima Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD72459  Brodiaea elegans subsp. elegans Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3793 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  SEINET7296497 Image available Bromus anomalus Helen K. Sharsmith 1953-1 4266 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 549 Comment
  JEPS110141  Bromus arenarius Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  SEINET10822097  Bromus arenarius Lowell Ahart 2006-8-22 Ahart 13216 Colusa T18N, R6W, between the southwest 1/4 and southeast 1/4 of Section 29. South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CAS-BOT-BC149477  Bromus carinatus var. carinatus F. P. Cronemiller 1924-5-12 877 Colusa Below Lower Letts Valley. 1219 Comment
  JEPS80216  Bromus carinatus var. carinatus L. R. Heckard and J. Hickman 1980-7-3 5372 Colusa near Summit Springs (sw slope of Snow Mountain); Snow Mountain 1554 Comment
  CAS-BOT-BC155997  Bromus diandrus Roxana S. Ferris 1926-4-21 6277 Colusa Sycamore Slough 2 miles from 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
  CAS-BOT-BC155497  Bromus hordeaceus Roxana S. Ferris 1917-4-17 613 Colusa Sycamore Slough. Comment
  JEPS80197  Bromus hordeaceus L. R. Heckard and J. Hickman 1980-7-3 5351 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw of Snow Mountain) 1548 Comment
  UCD37832  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. 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
  JEPS80797  Bromus laevipes L. R. Heckard and J. C. Hickman 1981-7-30 5767 Colusa se side of Snow Mountain, along Trout Creek Trout Creek; Snow Mountain, Trout Creek 1554 Comment
  UCR212307  Bromus laevipes Craig D. Thomsen 2001-5-24 2531 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
  CHSC112028  Bromus laevipes David Isle; Doug Johnson 1988-5-11 2089 Colusa Mendocino National Forest. Little Stony Road (Goat Mtn Rd). 426 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
  HSC72175  Bromus madritensis subsp. rubens Thomas W. Nelson, Jane P. Nelson 1978-4-2 9552 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SEINET244463 Image available Bromus rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  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
  UC1543019  Bromus tectorum Donald G. Nelson et. al. 1940-6-8 686 Colusa w boundary Snow Mountain, east not far from summit Snow Mountain; w boundary Snow Mountain 1981 Comment
  UCD65632  Bromus tectorum Craig D. Thomsen 2000-4-12 2133 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
  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
  SEINET3923568  Bromus tectorum S. Bowie, J. Lopez; D. Riess 1994-4-23 0172 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
  CAS-BOT-BC273300  Cacaliopsis nardosmia J. M. Tucker; John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout and Upper Letts Valley (ca. 2 1/2 miles, airline, north of the lookout), Goat Mountain 1524 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
  CHSC112207  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  HSC72159  Calandrinia ciliata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9534 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SEINET3872957  Calandrinia ciliata Richard R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca 10 miles north of Colusa (junction of State Hwys. 45 & 20).; 0 22 Comment
  SEINET7096749  Calandrinia ciliata 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
  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
  UCD82342  Calandrinia ciliata Robin McMaster 1973-4-15 332 Colusa middle of Bear Valley. Comment
  CAS-BOT-BC167285  California macrophylla Roxana S. Ferris 1926-4-23 6406 Colusa Grade beyond the Mountain House on Williams - Stonyford Road Comment
  CHSC60670  Callitriche marginata Vernon H. Oswald 1993-4-14 5261 Colusa W side of O'Hair Rd., just S of Hwy. 20, Colusa National Wildlife Refuge, SW of Colusa. On the bottom of a depression in a field along the road. 18 Comment
  UC725389  Calochortus amabilis A. A. Heller 1940-5-6 15577 Colusa 2 mi w Highway 16 junction with State Highway 20 (on State Highway 20) Comment
  UCD56677  Calochortus amabilis Jack Alderson 2007-3-25 13 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. 570 Comment
  CAS-BOT-BC492124  Calochortus amabilis Roxana S. Ferris 1926-4-23 6447 Colusa Grapevine grade between Stonyford and Sites Comment
  CDA39298  Calochortus amabilis T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  UC1733772  Calochortus luteus Kay H. Beach 1940-5-16 659 Colusa Colusa and Lake county line Comment
  CAS-BOT-BC491929  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  CAS-BOT-BC491930  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  CHSC80106  Calochortus splendens L. P. Janeway; Joyce Lacey-Rickert 2000-6-1 6779 Colusa Vicinity of Grapevine Creek, Scotties Canyon, and Rena Canyon. 243 Comment
  UCD63117  Calochortus splendens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4948 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. 401 Comment
  UCR228282  Calochortus splendens Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4948 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
  UC1187346  Calochortus splendens Herbert L. Mason 1961-5-21 15075 Colusa Mouth of Bear Valley 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
  HSC97061  Calochortus vestae J. Carey, A. Hong, J. Leffingwell 1995-5-7 88 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  UC1971752  Calycadenia micrantha R. L. Carr 1994-9-23 2656 Colusa Wilson Camp, SE of Stoneyford, near the Colusa/Lake county line, ca. 3 air mi SE of Goat Mountain 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
  UC1552845  Calycadenia pauciflora Frederica Bowcutt 1985-6-19 605 Colusa just sw, n of Wilbur Hot Springs about 2 air miles Bear Valley Comment
  UCD146725  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 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
  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
  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
  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-BC270743  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles N of Highway 20 on Bear Valley Road, along banks of Bear Creek Comment
  CAS-BOT-BC270748  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles W of Lodoga on road to Stoneyford 411 Comment
  CAS-BOT-BC270754  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles SW of Leesville on Bartlett Springs Road 518 Comment
  CAS-BOT-BC270756  Calycadenia pauciflora H. M. Hall 1930-10-3 12936 Colusa 2 miles S of Stoneyford Comment
  RSA255559  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs road on Walker Ridge Road, Buck Flat 869 Comment
  UC1876242  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 mi W of Leesville-Lodoga Rd. on road to Cooks Springs. Comment
  UC1876243  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mi E of Lake Co. line on Bartlett Springs Rd. Comment
  UC1876635  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 mi SW of Leesville on road to Bartlett Spr. Rd. 518 Comment
  UC1876636  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 mi SW of Leesville on road to Bartlett Spr. Comment
  UCD129807  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 miles south of Stoneyford on road to Lodoga. 365 Comment
  UCD129891  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 miles southwest o Leesville on road to Bartlett Springs. Comment
  UCD129893  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles southwest of Leesville on Bartlett Springs. 518 Comment
  HSC72507  Calyptridium quadripetalum Thomas W. Nelson, Jane P. Nelson 1980-6-24 5880 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  UCD82524  Calyptridium quadripetalum Craig Thomsen; G. Harrington 2009-5-12 2881 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  CHSC70485  Calystegia collina R. A. Schlising; T. Spira 1978-5-13 3233 Colusa Just E of Lake County line, along Hwy 20. Comment
  UCD163873  Calystegia collina subsp. collina Craig D. Thomsen 2000-5-11 2307 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1.5 mile west of Hwy 20/16 instersection. Comment
  UCD57719  Calystegia collina subsp. collina Jordan Thompson; 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/Eastern part of ranch. Craig Canyon. North side of Craig Creek on south side of unimproved road. 335 Comment
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Feb 20 2009
  CHSC70976  Calystegia collina subsp. oxyphylla Vernon Oswald; Lowell Ahart 1998-5-7 9000 Colusa Barlett Springs Rod. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  RSA800324  Calystegia collina subsp. oxyphylla Sandra M. Namoff, Eric R. Carter 2013-6-16 79 Colusa North of Hwy. 20 take Bear Valley Rd to Brim Rd, population is 0.2 miles NE of intersection of Brim Rd and Bartlett Springs Rd. 648 Comment
  UCD82493  Calystegia collina subsp. oxyphylla Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5682 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
  JEPS81301  Calystegia occidentalis subsp. occidentalis L. R. Heckard and J. C. Hickman 1982-7-5 5915 Colusa slope below Summit Springs, S side Snow Mountain Comment
  RSA261450  Camassia leichtlinii subsp. suksdorfii J. M. Tucker, L. K. Mann 1959-5-30 3531 Colusa Small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout 1220 Comment
  CHSC100287  Camassia quamash David Isle 1990-6-6 1517 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  UC71985  Camissonia contorta Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley 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
  POM271975  Camissonia graciliflora Lyman Benson 1935-3-27 6328 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 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
  CDA15476  Camissoniopsis hirtella G. F. Hrusa, WTD 1998-6-19 14613 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CDA38025  Camissoniopsis hirtella Vernon H. Oswald & Lowell Ahart 1998-5-7 9004 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. 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
  CAS-BOT-BC37028  Capsella bursa-pastoris Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-9 32 Colusa At intersection of Rim Road with Bear Valley Road. 350 Comment
  RSA0116218  Cardaria chalepensis David W. Isle 2007-4-13 1633 Colusa About 1 mile east of Maxwell; south of Maxwell Road and east of Lyons Road in ditch between rice fields east of William Dirk s shop. 30 Comment
  CHSC107961  Carduus pycnocephalus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1848 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.6 mi southeast of Funks Reservoir and 130 ft east of Tehama-Colusa Canal. Ca 0.3 mi NW of large +- saline/alkaline wetland/marsh, next to large transmission-line towers. 54 Comment
  UCD159527  Carduus pycnocephalus subsp. pycnocephalus D. S. Park 2011-4-6 276 Colusa Off Rt. CA-20. Roadside. Disturbed. Comment
  CHSC92598  Carex bolanderi D. Isle 2005-7-14 1145 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In first perennial drainage west of junction 17N09 diagonal 17N10 about 40 yards above culvert crossing 17N09. Waypoint BDCMP 1: NAD27 10S 0523113E 4350662N. Comment
  JEPS110407  Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS80377  Carex densa L. R. Heckard and J. Hickman 1981-6-22 5610 Colusa S side of E ridge of E Peak, Snow Mountain 1950 Comment
  JEPS81293  Carex densa L. R. Heckard and J. Hickman 1982-7-5 5905 Colusa Slope below (S of) area. Summit Springs, S side of Snow Mountain 1500 Comment
  SEINET7556704 Image available Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC92529  Carex feta G. F. Hrusa; WTD 1998-6-19 14619 Colusa Wet area on spring along Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). 975 Comment
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 Comment
  CAS-BOT-BC35776  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa Snow Mt.;northeast slope of West Peak 2072 Comment
  SEINET7563262 Image available Carex klamathensis Unknown 1999-7-5 6497 Colusa At Bear Wallow Spring, on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. Hough Springs quad. 1045 Comment
  JEPS75124  Carex lenticularis var. impressa L. R. Heckard 1972-7-8 3059 Colusa upper reaches of Dark Hollow Creek in saddle between East Peak of Snow Mt. and West Peak of Snow Mt.; Dark Hollow Creek 1981 Comment
  CDA21575  Carex nudata D. G. Kelch 2001-4-2 1 .043 Colusa N end of Walker Ridge. Comment
  UCD84435  Carex nudata Jack Alderson 2009-4-8 31 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CAS-BOT-BC119425  Carex obnupta Roxana S. Ferris 1917-4-15 607 Colusa Sycamore Slough. Comment
  CHSC92669  Carex pachystachya D. Isle 2005-9-14 1173 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
  JEPS80867  Carex pachystachya L. R. Heckard and J. C. Hickman 1981-7-31 5795 Colusa Dark Hollow Creek, e side of Snow Mt. Snow Mt., Dark Hollow Creek 1584 Comment
  UCD163855  Carex praegracilis Craig D. Thomsen 2001-4-12 2472 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD63116  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4947 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. 398 Comment
  UCD82623  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2893 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 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
  RSA262496  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  CHSC55605  Carex serratodens James Jokerst 1985-4-5 2213 Colusa Near Coyote Peak. 608 Comment
  JEPS110261  Carex serratodens Lowell Ahart 2006-6-11 12669 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS80858  Carex serratodens L. R. Heckard and J. C. Hickman 1981-7-30 5739 Colusa along Trout Creek trail, se side Snow Mt. Snow Mt., Trout Creek trail 1676 Comment
  UCD57291  Carex serratodens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3662 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. 319 Comment
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82727  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2910 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
  HSC36255  Carex serratodens Steven Lagos 1974-5-4 48 Colusa 915 Comment
  JEPS80854  Carex subfusca L. R. Heckard and R. C. Bacigalupi 1976-9-6 4443 Colusa ne side of Fouts Camp promontory Snow Mt., Fouts Camp promontory 1859 Comment
  CAS-BOT-BC116775  Carex subfusca Peter H. Raven; R. Snow 1959-9-11 14422 Colusa Along stream in wet soil, Bonnie View. 914 Comment
  UCD23340  Castilleja A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Comment
  CHSC77956  Castilleja affinis subsp. affinis Beth Hendrickson; Jean Witzman 1999-3-17 Colusa Vicinity of Antelope Valley, Grapevine Creek, and Sites-Lodoga Road. 158 Comment
  UCD84431  Castilleja applegatei Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 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
  HSC44462  Castilleja applegatei subsp. martinii R. York, Advanced Plant Taxonomy Lab 1978-4-22 131 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS94198  Castilleja applegatei subsp. martinii Vernon Oswald and Lowell Ahart 1998-5-7 8995 Colusa Bartlett Springs Rd. 1.6 mi. w. of Bear Valley Rd. 487 Comment
  UCD81237  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5401 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. 223 Comment
  UCD97120  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6903 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 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
  JEPS46009  Castilleja applegatei subsp. martinii L. R. Heckard and G. T. Robbins 1957-7-25 814 Colusa just e summit of Snow Mountain (West) (near Colusa-Lake County line); Snow Mountain (West) 2042 Comment
  CHSC115341  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa Normal size plants, on dark damp soil, along the south edge of Leesville Road. 445 Comment
  SBBG128982  Castilleja attenuata G. K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Rd, 1.8 mi SE of Sites 77 Comment
  SD239905  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites (Sites 7.5'Q) 77 Comment
  UCD83624  Castilleja attenuata Adam Clause; with PLB 102 class 2010-5-2 3 Colusa Walker Ridge. Eaton Springs.15 meters north of the main road, on the flat valley floor. 709 Comment
  CHSC27558  Castilleja exserta W. K. Cheechov 1978-4-9 4 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CHSC60153  Castilleja exserta Bryan Case 1988-4-9 129 Colusa Ca. 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca 18 mi se of Williams. 321 Comment
  UCR148774  Castilleja exserta E. Witharm 1998-4-17 6 Colusa Bear Valley, Bear Valley Rd., 8 road mi from junction of Bear Valley Rd. and Leesville-Lodoga Rd 396 Comment
  UCR37943  Castilleja exserta Mike Malamus, P. Williams, Brian Kearney 1984-4-29 70 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  CDA32834  Castilleja exserta P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD15677  Castilleja exserta Anne B. Overturf 1989-4-8 13 Colusa Lake County border. Walker Ridge. 658 Comment
  CHSC59611  Castilleja exserta subsp. exserta Carole Pauls 1975-4-20 5 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  SEINET3079797 Image available Castilleja exserta subsp. exserta L. Blackford, S. Branch, D. Malm 1988-4-17 73 Colusa 1.3 miles south of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. 396 Comment
  UCD64254  Castilleja exserta subsp. exserta Craig D. Thomsen 2000-3-31 2055 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
  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
  CHSC110845  Castilleja foliolosa David Isle; Rhonda Isle 1989-4-29 2000 Colusa Stony Creek Watershed. Just N of 18N01 (Fouts Springs Rd.), ~2 miles W of Jct. w/Co. Rd. 306. (Just E of entrance to Brother Moore's Home). 382 Comment
  CHSC114943  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa On the northside of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chaparral. 500 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
  RSA783308  Castilleja foliolosa R. R. Halse 2011-3-25 8160 Colusa Along State Hwy 20 just E of the Lake County Line. ca. 14.6 miles E of its junction with State Hwy 53. 558 Comment
  HSC97657  Castilleja foliolosa Danny Pineda 2001-4-21 7 Colusa Found at Walker Ridge area 671 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
  JEPS82029  Castilleja miniata Todd Keeler-Wolf 1983-6-22 715 Colusa 2 mi up Goat Mt. road; Little Stony Creek 411 Comment
  CDA11255  Castilleja miniata subsp. miniata G. F. Hrusa 1994-11-7 11990 Colusa North Coast Biodiversity Arena; Banks of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  CHSC111212  Castilleja miniata subsp. miniata David Isle 2013-8-23 2049 Colusa Stony Creek Watershed. W bank Salt Ck, ~ 150'NE of Dennis Dr Bridge on Isle Property. 374 Comment
  RSA0037133  Castilleja miniata subsp. miniata David W. Isle 2013-8-23 2049 Colusa W bank Salt Ck, ~150'NE of Dennis Dr Bridge on Isle Property. 374 Comment
  UC198199  Castilleja minor subsp. spiralis Katharine Brandegee 1910-8-10 Colusa Epperson's Grade; sw Colusa Co. Comment
  UCD163307  Castilleja rubicundula Craig D. Thomsen 1997-4-7 1897 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCR37942  Castilleja rubicundula subsp. lithospermoides P. Williams, Brian Kearney, Mike Malamus 1984-4-28 74 Colusa 2.9 mi west of Leesville Lodoga Junction on Brim Road. 418 Comment
  UCR40060  Castilleja rubicundula subsp. lithospermoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 27 Colusa Bear Valley, Brim Road, 2.9 mi west of Leesvillle-Lodoga Junction 418 Comment
  JEPS39675  Castilleja rubicundula subsp. rubicundula Rimo Bacigalupi, T. Crovello and L. Heckard 1965-4-26 9042 Colusa 0.7 mi w Wilbur Springs and Bear Creek Road; Blue Ridge 341 Comment
  JEPS44112  Castilleja rubicundula subsp. rubicundula Barrie Stanfield 1966-4-16 27 Colusa 5 mi n Wilbur Springs turnoff (Bear Valley bottomlands); Bear Valley Comment
  RSA0118613  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2013-5-1 18687 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
  UCD163871  Castilleja rubicundula subsp. rubicundula Craig D. Thomsen 2000-3-31 2132 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
  CDA11400  Castilleja tenuis G. F. Hrusa, K. van Katwyk 1995-4-22 12120 Colusa Inner North Coast Ranges; flat on Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  SEINET10539694  Caulanthus Katherine L. Morris 1973-6-6 Morris 385 Colusa Chaparral woodland and sparse oaks; on hwy 20, 0.3 mi e of lake county line. Comment
  UCD114215  Caulanthus flavescens J. M. Tucker 1958-3-7 3364 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. 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
  JEPS121112  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  RSA0118787  Caulanthus lasiophyllus Lowell A. Ahart 2013-5-1 18681 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
  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
  HSC98203  Ceanothus cuneatus Steven Lagos 1974-5-4 50 Colusa 915 Comment
  JEPS42087  Ceanothus cuneatus var. cuneatus W. L. Jepson 1920-5-23 8964 Colusa near Leesville; SW Colusa Co., Bear Valley Comment
  UCD170260  Ceanothus integerrimus D. O. Burge 2016-11-3 2185 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 630 Comment
  UCD170264  Ceanothus integerrimus D. O. Burge 2016-11-3 2188 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 980 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
  UCD110813  Ceanothus jepsonii Christopher Mallek 2008-1 PR1- 2 Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD56664  Ceanothus jepsonii 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. 576 Comment
  CHSC93619  Ceanothus jepsonii var. albiflorus C. L. Schmidt 1989-6-13 1253 Colusa 1 mile up dirt road to Trout Creek near Davis Campsite and Fouts Springs Campground ca. 9 mi W of Stonyford; on E side of Snow Mountain. 600 Comment
  HSC96785  Ceanothus jepsonii var. albiflorus J. Carey, A. Hong, J. Leffingwell 1995-5-6 75 Colusa 3.2 mi N on Walker Ridge Rd. from its junction with Indian Valley Access Rd. 854 Comment
  UCD81260  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5425 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
  UC1299512  Ceanothus palmeri Freed W. Hoffman 1947-6-19 1655 Colusa Cook's Springs Cook's Springs (western Colusa County) Comment
  UCD148667  Ceanothus parvifolius G. Ledyard Stebbins 1985-5-19 C 530 Colusa Southeast of Goat Mountain peak. Pacific Point along Goat Rock Ridge, east of Goat Rock. (Exact location unknown; coordinates estimated by label maker. Note, Pacific Point at 3700 ft does not quite fall into Section 25.) 1127 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
  UC30927  Centaurea melitensis J. Burtt Davy 1898-5-1 4288 Colusa near Princeton Comment
  UCD82113  Centaurea melitensis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5641 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC284462  Centaurea solstitialis Roxana Stinchfield 1916-7-12 474 Colusa Street - College City Comment
  SEINET10798227  Centaurea solstitialis Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 376 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UCD82577  Centaurium Craig Thomsen 2008-6-12 2767 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
  JEPS93803  Centaurium trichanthum Vernon H. Oswald and Lowell Ahart 1998-7-15 9267 A Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 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
  CAS-BOT-BC272813  Centromadia parryi subsp. parryi H. M. Hall 1930-10-3 12938 Colusa Southwestern Colusa County. North of Wilbur Springs on road to Stonyford Comment
  UCD61446  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3891 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  UCD61474  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3920 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
  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
  UCD162396  Centromadia parryi subsp. rudis Juliette Robinson 2013-10-8 2 Colusa Along Highway 20, just east of I-5. 19 Comment
  UCD77502  Centromadia parryi subsp. rudis Robert E. Preston 1999-9-24 1242 Colusa Antelope Valley, at head of Salt Canyon. 219 Comment
  UCD16094  Centromadia pungens J. Schmierer 1999-4-27 s.n. Colusa Exact location unknown. Comment
  JEPS38150  Centromadia pungens subsp. pungens W. L. Jepson 1934-5-3 16600 Colusa n of Colusa (Stegeman Station) Comment
  CAS-BOT-BC279207  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa 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
  CHSC83633  Centromadia pungens subsp. septentrionalis L. P. Janeway 2002-4-25 7525 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 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
  UC931956  Cephalanthus occidentalis var. californicus Verne Grant and Alva Grant 1946-8-6 7839 Colusa near Colusa (Butte Creek bank, 1 mi n of Butte Outing Gun Club); Butte Creek Comment
  HSC66011  Cercis occidentalis Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 46 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  RSA590197  Cercocarpus betuloides Michael A. Vincent, Robert M. Rhode 1996-3-30 7299 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  RSA670064  Cercocarpus betuloides G. L. Webster 1989-5-6 7698 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  UC1618010  Cercocarpus betuloides Donald G. Nelson 1940-6-8 679 Colusa w of Stoneyford (on e slopes of Snow Mountain, nw boundary of the county, trail several miles above Bonnie View); Snow Mountain 1066 Comment
  UCD113027  Cercocarpus betuloides G. F. Hrusa 1996-2-26 12635 Colusa Inner North Coast Ranges. E side of ridge separating Blanchard Valley from Bear Valley, on Leesville Road. 600 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
  HSC71298  Cercocarpus montanus var. glaber Thomas W. Nelson, Jane P. Nelson 1979-4-12 4628 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS15566  Chaenactis douglasii var. douglasii G. Thomas Robbins with L. R. Heckard 1956-7-25 3715 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, s flank of Snow Mt. East, between Snow Mt. East and Snow Mt. West); Snow Mt. East, Middle Fork Stony Creek 1981 Comment
  UCD159334  Chaenactis glabriuscula D. S. Park; E. Dean 2010-6-5 118 Colusa Walker ridge, Cold Spring Mt. Exposed serpentine outcrop. 1032 Comment
  CHSC53931  Chaenactis glabriuscula var. heterocarpha Vernon H. Oswald 1991-4-21 4518 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  JEPS120979  Chaenactis glabriuscula var. heterocarpha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18650 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
  UC630425  Chaenactis glabriuscula var. heterocarpha Annetta Carter 1938-5-8 1394 Colusa 4 mi se of Wilbur Springs; Inner North Coast Ranges, Bear Creek Canyon 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
  UCD130361  Chaenactis glabriuscula var. heterocarpha John M. Tucker 1969-4-26 4163 Colusa east of road, in middle part of Bear Valley. Comment
  CAS-BOT-BC277632  Chaenactis glabriuscula var. megacephala James Jokerst 1985-4-4 220 Colusa Near Rail Canyon 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
  JEPS2596  Chamaesyce ocellata subsp. rattanii Volney Rattan June 1884 Colusa n San Francisco Bay; Coast Mts., Stony Creek; Stony Creek, Colusa Co., N of San Francisco Bay 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
  SBBG28478  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  UC535094  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 564 Colusa about 7 mi n Leesville; Indian Creek 289 Comment
  UC73410  Chamaesyce serpyllifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD72463  Chamaesyce serpyllifolia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3797 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
  IRVC29631  Cheilanthes Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5027 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
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  CHSC94517  Chenopodium album Lowell Ahart 2006-8-22 13221 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS110404  Chenopodium album Lowell Ahart 2006-8-22 13221 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  UC1195198  Chenopodium album J. H. Thomas 1960-8-30 8865 Colusa about 5 mi nw College City (along road to Sycamore) Comment
  JEPS110058  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 A 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
  JEPS123892  Chenopodium californicum Lowell Ahart 2015-4-28 20112 Colusa About 300 yards north of the intersection of Bear Valley Road and Brim Road, about 2 miles southwest of Leesville, about 14 1/2 miles (air) west of Williams. 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
  UCD66481  Chenopodium californicum Craig D. Thomsen 2000-4-28 2225 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. Under massive valley oak, adjacent to Bear Creek at base of Hwy 20 fill-slope. 300 Comment
  UCD37706  Chloris virgata Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  SEINET4565689  Chloris virgata M. J. Williams 1981-9-2 81- 162 -1 Colusa Near an almond orchard on Wisconsin Avenue, south of Arbuckle 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
  CHSC77613  Chorizanthe membranacea Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. Shale slope in blue oak woodland. 167 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
  HSC65996  Chorizanthe membranacea D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 43 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  CHSC42575  Cicuta douglasii Vernon Oswald 1986-6-30 2176 Colusa North end of Lily Pond near Letts Lake. 1188 Comment
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  UCD57862  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 49 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
  UCD82196  Clarkia concinna Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5696 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CDA329  Clarkia concinna G. D. Barbe 1982-6-4 3635 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  CHSC94884  Clarkia concinna subsp. concinna Lowell Ahart 2006-6-11 12668 Colusa On the west side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  SJSU11006  Clarkia concinna subsp. concinna J. B. Willis Jr 1969-5-31 200 Colusa by State Hwy 20, 0.5 mi W of junction with Hwy16 c. midway between Williams & Clear Lake Comment
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Aug 26 2011
  CAS-BOT-BC164526  Clarkia gracilis subsp. albicaulis A. A. Heller 1916-6-6 12354 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CAS-BOT-BC164527  Clarkia gracilis subsp. albicaulis A. A. Heller 1916-6-6 12354 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  LA45424  Clarkia gracilis subsp. albicaulis G. L. Stebbins Jr.; Malcolm A. Nobs, J. A. Rattenbury 1947-4-27 3755 Colusa 3 mi. W of Leesville, on road to Bartlett Springs Comment
  JEPS81291  Clarkia gracilis subsp. gracilis L. R. Heckard and J. C. Hickman 1982-7-5 5903 Colusa slope below and s Summit Springs (s side of mountain); Snow Mt. 1500 Comment
  UCR228652  Clarkia gracilis subsp. gracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4939 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 20 351 Comment
  CHSC79535  Clarkia modesta B. Castro; L. P. Janeway 2000-5-2 1105 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  CAS-BOT-BC163285  Clarkia modesta Peter H. Raven 1963-5-20 18401 Colusa 9.5 miles east of Houghs Springs (Lake County) Comment
  HSC86833  Clarkia purpurea S. L. Steinwert 1985-4-13 10 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  UCD104881  Clarkia purpurea Karen Rose 1985-4-13 4 Colusa Salt Canyon, N side of Salt Creek, Highway 20, 11 miles WSW of Williams. 143 Comment
  JEPS43724  Clarkia purpurea subsp. purpurea Alice King 1906-1-1 Colusa College City Comment
  CAS-BOT-BC240292  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs 817 Comment
  SD133953  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 Colusa road to Goat Mt Lookout 2.2 miles south of Route M-10 (Bear Creek-Fouts Spring Road) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford; 1500 Comment
  UC1299410  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa between Upper Letts Valley and Lower Letts Valley; North Coast Ranges Comment
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  JEPS124232  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  JEPS95503  Claytonia exigua subsp. exigua Vernon H. Oswald 1994-3-23 6015 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. Occasional populations in serpentine soil of brushy and rocky slopes. 518 Comment
  SEINET199010  Claytonia exigua subsp. exigua H. K. Sharsmith 1953-6-19 4281 Colusa Mendocino National Forest ; Near Trough Springs on Trough Springs Ridge 975 Comment
  UCD65633  Claytonia exigua subsp. exigua Craig D. Thomsen 2000-4-12 2136 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
  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
  CAS-BOT-BC439114  Claytonia exigua subsp. exigua K. L. Chambers 1978-3-19 4423 Colusa Hwy. 20 between Williams and Clear Lake, Inner Coast Range, 15.8 mi. W of Hwy. 5 and 2.9 mi. E of junction with Hwy. 16. Comment
  UCD67063  Claytonia parviflora Craig D. Thomsen 2008-3-20 2717 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 450 Comment
  UC1745698  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1379 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  SEINET199005  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Mendocino National Forest ; Summit of Goat Mt. Lake-Colusa boundary 1864 Comment
  RSA114165  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Summit of Goat Mtn, Mendocino National Forest, lake - Colusa Boundary. 1865 Comment
  SFV8355  Clematis lasiantha D. Grau 1972-4-1 4 Colusa Highway 16, 5 miles south of junction with Highway 20. Comment
  CAS-BOT-BC92546  Clematis ligusticifolia A. F. Hough 1924-6-22 3 Colusa California Forest. McDaniels R.S. 914 Comment
  RSA0037131  Clematis ligusticifolia B. Castro 2008-7-10 1773 Colusa Sacramento Valley. Along S bank of Sacramento River, ca. 5 mi N of town of Colusa, just N of Reservation Road; in undesignated Section near Colusa Rancheria. 18 Comment
  SBBG27284  Collinsia bartsiifolia var. bartsiifolia E. Crum 1938-5-8 2020 Colusa 3 mi N of Leesville Comment
  UC1238969  Collinsia greenei Freed W. Hoffman 1948-6-28 2536 Colusa e side Black Diamond Mtn (near Glenn-Colusa county line); North Coast Ranges, Black Diamond Mtn 838 Comment
  HSC44463  Collinsia heterophylla R. York 1978-4-22 141 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1613286  Collinsia heterophylla Charles M. Belshaw Apr 1937 2884 Colusa vicinity of Cook's Spring (Inner North Coast Range, Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  UC71624  Collinsia heterophylla Miss Alice King 1905-1 Colusa College City Comment
  UCD64412  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212362  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UC204795  Collinsia rattanii Volney Rattan 1884-6-15 Colusa w slope of Black Butte Black Butte Comment
  HSC31614  Collinsia sparsiflora Maralyn O'Meara, Gary S. Lester 1974-5-4 344 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  UCD57341  Collinsia sparsiflora Sergio Testa 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  CHSC70908  Collinsia sparsiflora var. arvensis Vernon Oswald; Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodga Rd. 4.2 mi south of Stonyford. 384 Comment
  JEPS6657  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa 15 m w Williams (Hwy 20) Comment
  UCD58120  Collinsia sparsiflora var. arvensis Ellen Dean; PLB 102 Class 2007-4-29 3716 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. 304 Comment
  UC1736363  Collinsia sparsiflora var. collina Dean W. Taylor 1992-4-16 12404 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek 411 Comment
  UC638655  Collinsia sparsiflora var. sparsiflora Ethel Crum 1938-5-8 2028 Colusa 3 mi n of Leesville (Inner North Coast Range); Inner North Coast Range Comment
  JEPS81380  Collinsia torreyi var. wrightii L. R. Heckard and J. C. Hickman 1982-7-8 5991 Colusa trail from saddle between E and W Peaks towards Signal Peak, Snow Mt. Snow Mt. 2042 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
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  UCD74342  Collomia diversifolia G. Ledyard Stebbins 1968-5-10 6686 Colusa South end of Walker Ridge, north of Hwy 20. Near headwaters of Sulphur Creek. (Note: notebook says date of collection was 10 May. Labels made by Stebbins at CAS say 15 May.) 762 Comment
  CHSC64135  Collomia tinctoria David Isle 1992-8-3 Colusa Snow Mountain. Just west of the helispot. Comment
  JEPS15537  Collomia tinctoria G. Thomas Robbins with L. R. Heckard 1956-7-25 3695 Colusa open rocky slope in woods on ridge above Fouts Camp (along trail to Snow Mt. (about 1 1/2 mi airline se of summit), on Lake-Colusa County boundary) 1920 Comment
  RSA113933  Collomia tinctoria H. K. Sharsmith 1953-7-1 4402 Colusa Linger Longer Camp, Goat Mountain, Mendocino National Forest 1585 Comment
Read comments
Jun 30 2012
  UCD72535  Conium maculatum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3826 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, ca. 0.25 mile downstream of bridge. 246 Comment
  UCD73112  Conium maculatum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3826 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, ca. 0.25 mile downstream of bridge. 246 Comment
  NY643135  Convolvulus arvensis R. J. Stinchfield 1916-7-8 401 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UCR201548  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14266 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  POM66158  Convolvulus arvensis Roxana Stinchfield 1916-7-8 401 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UCR205139  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14243 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD138921  Corallorhiza maculata J. M. Tucker; L. K. Mann 1959-5-30 3530 Colusa small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1219 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
  JEPS83552  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa w side of Ohm Rd ca 0.5 mi n jct. w/ Ware Rd.; Colusa Nat'l Wildlife Refuge, Arbuckle 7.5' quad. 13 Comment
  JEPS83553  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa w side of Ohm Rd ca 0.5 mi n jct. w/ Ware Rd. (corner of Colusa Nat'l Wildlife Refuge); Colusa Nat'l Wildlife Refuge, Arbuckle 7.5' quad. 13 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
  CHSC105198  Cordylanthus pilosus subsp. pilosus B. Castro; L. P. Janeway 1999-7-5 1012 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, along small rd to Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1057 Comment
  JEPS66469  Cordylanthus pilosus subsp. pilosus G. D. Carr 1971-7-29 604 Colusa Lodoga, Lodoga-Stoneyford Rd 396 Comment
  JEPS68402  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3146 Colusa above Happy Camp (e end of Snow Mt.) 731 Comment
  RSA125795  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. 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
  UC1776781  Cornus glabrata G. F. Hrusa 1989-5-7 6086 Colusa North Coast Ranges; Road to Cedar Mtn., along Little Stony Creek, approx. 2.5 miles above intersection with Stonyford-Lodoga Rd. Shaded area beneath Populus fremontii 450 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
  JEPS80825  Cornus sericea subsp. sericea L. R. Heckard and J. Hickman 1981-7-31 5797 Colusa e. side Snow Mt. (Dark Hollow Creek) 1584 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
  CHSC83313  Cotula coronopifolia 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
  UCD18850  Cotula coronopifolia Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 158 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
  UCD38810  Crepis acuminata Beecher Crampton 1958-5-19 4803 Colusa 5.5 miles south of Ladoga. 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
  CHSC107292  Cressa truxillensis L. P. Janeway; B. Castro 2011-7-9 10510 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. Just off of the northwest corner of the marsh. 49 Comment
  CHSC107940  Cressa truxillensis B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1885 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. At east side of large +- saline/alkaline wetland/ marsh; in vernal depression in compacted E-W road track that goes through marsh. 49 Comment
  POM66160  Cressa truxillensis Roxana Stinchfield 1916-7-11 143 Colusa Willaims Road at theTrough Comment
  CHSC94318  Croton setiger Lowell Ahart 2006-8-9 13103 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC77404  Crypsis schoenoides Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  RSA268077  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1972-6-6 5658 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
Read comments
Aug 18 2014
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UCD59814  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  RSA126602  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa Three miles south of Colusa. 15 Comment
  RSA756393  Crypsis vaginiflora Barbara Ertter, Elizabeth Nesse, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  CHSC14127  Cryptantha L. V. Ritter 1969-4-30 236 Colusa Ca 100 yds. w of the junction of Highway 20 and 16, ca 50 yds. n of Highway 20. Comment
  UCD84442  Cryptantha Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6047 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
  OBI20714  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  CHSC79095  Cryptantha flaccida B. Castro; C. Warren 2000-4-3 1048 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 179 Comment
  HSC45688  Cryptantha flaccida Patricia Shesgreen 1978-4-22 31 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  UC1177897  Cryptantha flaccida Peter M. Ray 1950-4-16 1715 Colusa junction of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  JEPS89019  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa County line, on road to Williams Comment
  POM311071  Cryptantha hispidula Leo Koch 1940-4-29 936 a Colusa Serpentine hill near Lake and Colusa county line along highway 20, Williams Highway. Comment
  UCD63124  Cryptantha hispidula Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4954 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
  UCD82520  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2877 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCD70249  Cryptantha hispidula D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Annual grasslands in serpentine chaparral edges. 450 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC1212585  Cryptantha intermedia Francia Chisaki and Helen Sharsmith 1959-5-26 1331 Colusa 5 air mi w Stonyford (above Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest Comment
  UCD63020  Cryptantha intermedia Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4672 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
  UCD63120  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4950 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
  UCD119838  Cryptantha intermedia Beecher Crampton 1958-5-19 4820 Colusa Little Stony Creek Canyon. Comment
  SDSU20616  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-5-6 1540 Colusa On north side of Bear Valley Road in Bear Valley, 5.8 miles south of Brim Road junction. 387 Comment
  UC596361  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w of Arbuckle (Sand Creek foothills); Sand Creek Comment
  CHSC32209  Cryptantha torreyana James Jokerst 1980-8-7 1064 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  JEPS80034  Cryptantha torreyana L. R. Heckard 1974-9-10 3900 A Colusa top of East Peak Snow Mt., East Peak 2148 Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CAS-BOT-BC80807  Cupressus sargentii Hugh Leech 1971-10-9 s.n. Colusa [Cook's] Cooks Springs 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
  CHSC62835  Cupressus sargentii Vernon H. Oswald; Lowell Ahart 1994-3-23 6010 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
  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
  CDA35676  Cuscuta approximata CDFA Staff 2011-11-5 PDR# 1552505 Colusa Maxwell. 0 Comment
  JEPS75861  Cuscuta californica L. R. Heckard 1974-9-10 3888 Colusa e of East Peak (along upper reaches of Dark Hollow Creek); Snow Mt., Dark Hollow Creek 2011 Comment
  SBBG115554  Cuscuta californica var. californica B. Crampton 1961-7-20 5935 Colusa 4 mi SE of Grimes, along Knight's Landing Rd Comment
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  CAS-BOT-BC190176  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 miles south of College City. Comment
  UCD60095  Cynodon dactylon Kathryn Johnson 1966-5-14 51 Colusa 14 miles east of Lodoga on road to Maxwell. Comment
  CAS-BOT-BC114781  Cyperus acuminatus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 465 Colusa Davis tule, near Sycamore Slough. Comment
  POM185713  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule, near Sycamore Slough. Comment
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. Comment
  CAS-BOT-BC114730  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa Roadside hollow in shallow overflow from rice fields, 3 mi W of Williams. 30 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
  JEPS30814  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 mi. w. Williams 30 Comment
  JEPS64066  Cyperus difformis W. L. Jepson 1929-10-1 15343 Colusa Maxwell 25 Comment
  UC698628  Cyperus difformis P. B. Kennedy 1925-9-18 Colusa Cortena, Colusa Comment
  UC710614  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 mi. w. Williams 30 Comment
  UCD141014  Cyperus difformis P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  UCD141018  Cyperus difformis Herbert L. Mason; Verne Grant 1946-8-7 12983 Colusa 8 miles north of Colusa. Comment
  CHSC94430  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1100527  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13117 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  CAS-BOT-BC114385  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa Below causway over Butte Sink spillway, E bank of Sacramento River, 1 mi N of Colusa. Comment
  UC1100519  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa 1 mi. n. Colusa (e. bank Sacramento R., below causeway over Butte Sink spillway,); Sacramento R. Comment
  UCD141054  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. 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
  CAS-BOT-BC445509  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  UCD18854  Damasonium californicum Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 162 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
  UCD35946  Damasonium californicum Beecher Crampton 1953-4-29 1148 Colusa 7 miles east of Maxwell. Comment
  SBBG119887  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  CDA41123  Datura ferox F. F. Swim 1959-6-18 2919 Colusa 0 Comment
  UCD57059  Daucus pusillus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3653 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
  UC1096411  Delphinium antoninum Helen K. Sharsmith 1956-6-30 4404 Colusa Linger Longer Camp Inner North Coast Ranges, Mendocino National Forest, Goat Mo 1584 Comment
  UC424843  Delphinium antoninum unknown 1929-7-1 3509 b Colusa between peaks Snow Mt. 2133 Comment
  CDA11416  Delphinium hesperium subsp. pallescens G. F. Hrusa, K. van Katwyk 1995-4-22 12137 Colusa Inner North Coast Ranges; Small colony on low slope in partial shade of Quercus douglasii on S side of Leesville Rd. approx. 3 m. N of Hwy 20, flowers light purplish to near white. Rather tall-to 3 ft., most individuals just beginning bloom. Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC80059  Delphinium hesperium subsp. pallescens L. P. Janeway; B. Castro 2000-5-4 6709 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 259 Comment
  JEPS96767  Delphinium uliginosum Dean W. Taylor 1998-6-23 16712 Colusa Walker Ridge, stock pond at head Doyle Canyon (ca 1 mile SE of Baldy Mtn) 853 Comment
  UCD23392  Delphinium variegatum Patrick Fox 1977-5-8 20 Colusa Open field 9.5 miles north of Highway 20 on Bear Valley Rd. Comment
  UCD96611  Delphinium variegatum Rolf Y. Berg 1963-3-17 s.n. Colusa State Highway 16 between Cache Creek Canyon and junction with State Highway 20. Comment
  UCD96729  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa 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
  CAS-BOT-BC16955  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-11 1210 Colusa Bear Creek Canyon Comment
  CAS-BOT-BC16958  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1926-4-23 6582 Colusa field 2 miles from Stonyford Comment
  UC71644  Delphinium variegatum subsp. variegatum Miss Alice King 1905-1 Colusa College City Comment
  UCD82458  Delphinium variegatum subsp. variegatum Craig Thomsen; G. Harrington 2009-5-12 2836 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC96981  Delphinium variegatum subsp. variegatum Jenny Marr, Heidi West, Joyce Lacey, Caroline Warren, Natalie Wight 1998-4-14 Colusa Near Grapevine Creek, Antelope Valley, Sites-Lodoga Rd. 137 Comment
  UCD61143  Deschampsia cespitosa Freed W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys. Comment
  SEINET3927152  Deschampsia cespitosa Fred W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys, western.; 0 Comment
  CAS-BOT-BC192667  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 549 Colusa 4 miles East of Williams Comment
  CHSC85968  Deschampsia danthonioides Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 91 Comment
  HSC9599  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa 3 mi. S of Arbuckle Rd. on the Pacific Hwy. Comment
  JEPS75435  Deschampsia danthonioides W. L. Jepson 1934-5-3 16601 Colusa Stegeman sta. n. of Colusa Comment
  UCD163856  Deschampsia danthonioides Craig D. Thomsen 2001-4-26 2483 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCR212334  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), 0.5 mi west of Hwy 20/16 intersection, (c. 0.3 mi. east of Hwy 20 'Vista Point'). 345 Comment
  SEINET10524208  Deschampsia danthonioides A. Arthur Heller 1902-5-1 Heller 5435 Colusa Near College City. Comment
  RSA756435  Deschampsia elongata Barbara Ertter 1989-7-1 8609 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
  JEPS81318  Descurainia sophia L. R. Heckard and J. C. Hickman 1982-7-6 5933 Colusa slope above and e Summit Springs (on s side of Snow Mt); Snow Mt. 1584 Comment
  CHSC48252  Dianthus armeria subsp. armeria Vernon Oswald 1986-6-30 2179 Colusa Mill Valley Campground near Letts Lake and Lily Pond. In a meadow. 1188 Comment
  UC1051506  Dicentra chrysantha Helen K. Sharsmith 1953-6-19 4277 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  UC725575  Dicentra chrysantha A. A. Heller 1940-6-5 15713 a Colusa e of Lodogo (near the foot of grade, on the Lodogo-Sites road) Comment
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  UC1093627  Dichelostemma capitatum Francia Chisaki and Gene B. Newcomb 1958-4-1 1098 Colusa 0.7 mi nw Highway 20 junction with road to Lodoga (on road to Lodoga) Comment
  CAS-BOT-BC500074  Dichelostemma capitatum Roxana S. Ferris 1917-4-12 521 Colusa 4 mi east of Williams. Alkali Plains. Comment
  CHSC81331  Dichelostemma capitatum subsp. capitatum J. Trizzino 2001-3-31 17 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  HSC31395  Dichelostemma capitatum subsp. capitatum Maralyn O'Meara, Gary S. Lester 1974-5-4 350 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC31718  Dichelostemma capitatum subsp. capitatum Teresa Prendusi 1974-5-4 50 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC45714  Dichelostemma capitatum subsp. capitatum Sheila Logan 1978-4-2 69 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC71291  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-11 4616 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  UC1053449  Dichelostemma volubile Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3173 Colusa 7.7 mi w Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  CAS-BOT-BC503140  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-BC208995  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  RSA725022  Digitaria sanguinalis L. Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UC1100288  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway 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
  CAS-BOT-BC153322  Diplacus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge, Mendocino National Forest 609 Comment
  SEINET8235421  Diplacus layneae Unknown 1959-5-27 1338 Colusa by Cooks Creek; about 1/4 mile east of Cooks Spring. 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
  RSA0018384  Dipsacus fullonum Joan Stewart 1998-6-18 755 Colusa Bear Valley Comment
  CAS-BOT-BC208651  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. 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
  UCD64213  Distichlis spicata var. stricta Beetle 1946-6-27 4685 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  UCD64465  Distichlis spicata var. stricta Beetle 1946-6-27 4686 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  CHSC116063  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  RSA10950  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford. 305 Comment
  UCD162980  Dodecatheon hendersonii Craig D. Thomsen 2002-2-7 2562 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.2 miles west of Hwy 20/16 intersection, west end of large turnout. 345 Comment
  UCD97119  Dodecatheon hendersonii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6902 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  UCR70827  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford 305 Comment
  CHSC48008  Downingia elegans Vernon Oswald 1984-7-20 1616 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. 1280 Comment
  CHSC79145  Downingia insignis B. Crampton 1953-4-29 1145 Colusa Along the road, about 3 miles east of Maxwell. Comment
  UC1192040  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa 3 mi e Maxwell Comment
  POM312375  Downingia insignis H. L. Mason 1953-4-5 14506 Colusa 3 miles east of Maxwell Comment
  POM59020  Downingia pulchella A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near College City. Comment
  RSA261511  Downingia pulchella L. L. Ferwerda 1968-5-4 17 Colusa In Bear Valley, ca. 11 miles NW of State hwy 20. 409 Comment
  UC70438  Drosera rotundifolia Milo S. Baker 1898-8-22 555 Colusa Bear Valley Mts.; along stream Comment
  HSC45678  Dudleya cymosa Stephen Plant 1978-4-22 203 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD81726  Dudleya cymosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5729 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
  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
  CHSC94397  Echinochloa crus-galli Lowell Ahart 2006-8-22 13233 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110361  Echinochloa crus-galli Lowell Ahart 2006-8-22 13215 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  SEINET241777 Image available Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa 4.5 miles south of Grimes Comment
  UCD32927  Echinochloa crus-galli Beecher Crampton 1965-7-8 7447 Colusa Colusa County, 2 miles south of Sycamore. Comment
  UCD32929  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 a Colusa Colusa County, 4.5 miles south of Grimes. Comment
  UCD34847  Echinochloa crus-galli Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCD60898  Echinochloa crus-galli K. Esau and D. Hartman 1941-7-17 Colusa Near Williams. Comment
  UCD34846  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena. Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. 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
  CAS-BOT-BC291140  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  UCD95151  Ehrendorferia chrysantha K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  UCD110439  Elatine ambigua June McCaskill 1954-8-9 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  UCD49592  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-7-18 1006 Colusa West of Williams, 2.5 miles, Colusa County. Comment
  CAS-BOT-BC112754  Eleocharis macrostachya Herbert L. Mason; Verne Grant 1946-8-6 12956 -B Colusa Pond on Colusa/Marysville Hwy, 4 mi S of Colusa, W side of Sacramento River. Comment
  CHSC79857  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  UC1100581  Eleocharis macrostachya Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 a Colusa 2 mi W of Williams Comment
  UCD49729  Eleocharis montevidensis D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain between Lodoga and Red Rock Cabin. 420 Comment
  POM313049  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa Rice fields 3 miles west of Williams Comment
  UCD164140  Elymus elymoides Craig Thomsen 2003-6-1 s.n. Colusa Bear Valley. About 9 miles north of Hwy 20. Near corner of sharp turn in central Bear Valley. Comment
  UCD82516  Elymus elymoides Craig Thomsen; G. Harrington 2009-5-12 2874 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  SEINET10564646  Elymus elymoides A. Arthur Heller 1916-6-6 Heller 12357 Colusa Coast range on the grade about 3 miles west of Leesville in the oak and digger pine belt on open gravelly slopes. Scrub oak, Heteromeles, & Toxicodendron are common shrubs. Comment
  CHSC91005  Elymus glaucus D. Isle 2002-6-28 177 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Below 4x4 Rd. 17N31 (Lovelady Ridge Jeep Rd.). 1060 Comment
  UCD82486  Elymus glaucus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 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
  UCD72393  Elymus glaucus subsp. glaucus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5119 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern part of ranch, upslope of confluence of Bear and Cache Creeks. Along old hunting camp road southeast (downslope) of junction with ridge trail. 384 Comment
  CAS-BOT-BC228536  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CAS-BOT-BC228537  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville Comment
  UCD61453  Elymus multisetus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3899 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 1/2 mile SW of parking lot. North of Eula Canyon. 420 Comment
  UCD62453  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville. Comment
  UC1795019  Elytrigia elongata R. K. Brummitt 1997-6-11 19696 Colusa 1 km W of Colusa on Route 20 100 Comment
  CDA15477  Elytrigia intermedia subsp. intermedia G. F. Hrusa, T. D. Wilfred 1998-6-19 14614 Colusa North Coast Ranges; Small colony on roadside and up into edge of Adenostoma/Quercus berberidifolia chaparral, above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Infestation in distinct clumps. Comment
  HSC48169  Emmenanthe penduliflora Thomas W. Nelson, Jane P. Nelson 1978-4-29 3933 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS16205  Emmenanthe penduliflora Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3180 Colusa Just west of base of the grade to Indian Valley (Bartlett Mt. Road), just west of Bear Valley, Inner North Coast Ranges Comment
  CHSC60744  Emmenanthe penduliflora var. penduliflora Vernon H. Oswald; Lowell Ahart 1993-5-27 5431 Colusa Sites-Lodoga Rd. ca 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). In loose mudstone along the road. 481 Comment
  UC1614404  Epilobium Charles M. Belshaw 1937-4-25 2828 Colusa Inner North Coast Range, Cooks Spring, Devils Ridge Devils Ridge; Inner North Coast Range, Cooks Spring, Devils Ridge Comment
  UCD55446  Epilobium brachycarpum Ellen Dean; Gordon Harrington 2006-10-6 3271 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
  UC73325  Epilobium campestre Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD66925  Epilobium campestre Craig D. Thomsen; G. Harrington 2008-7-6 2786 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
  UCD81239  Epilobium canum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5403 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just west of the mouth of canyon (inside the canyon) that is located south of Brophy Canyon. 266 Comment
  JEPS75838  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-11 3954 Colusa along Summit Springs trail Snow Mt.; , Summit Springs trail 1737 Comment
  CHSC113043  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2013-10-1 19101 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
  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
  CHSC86819  Epilobium cleistogamum 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
  CHSC94471  Epilobium densiflorum Lowell Ahart 2006-8-9 13140 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80388  Epilobium densiflorum L. R. Heckard and J. Hickman 1981-6-22 5621 Colusa big meadow along creek Snow Mt., Dark Hollow Creek 1889 Comment
  JEPS73520  Epilobium minutum L. R. Heckard 1972-7-10 3138 Colusa between Foutch Camp and Trout Creek crossing; Snow Mt. 1828 Comment
  UC638664  Epilobium minutum Ethel Crum 1938-5-7 2018 Colusa 4.2 mi n Rumsey (summit of ridge); Inner North Coast Range, Comanche Hills 254 Comment
  UCD164046  Epilobium minutum Richard Philbrook 2016-4-9 4 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just southwest of corral at junction of 16 and 20. Northeast facing slopes of hill. 343 Comment
  CHSC94473  Epilobium torreyi Lowell Ahart 2006-8-9 13117 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724896  Equisetum laevigatum L. Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC113050  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 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
  CHSC115631  Eragrostis hypnoides David Isle; Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~ 100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  CHSC115633  Eragrostis hypnoides David Isle; Terril Wolt 2014-9-24 2139 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~ 100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  RSA0119053  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~100 yds E of normal lake edge in muddy clay soil. 354 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
  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
  UC1299602  Eriastrum brandegeeae Freed W. Hoffman 1947-6-20 1605 Colusa road from Stonyford to Fouts Springs Comment
  CHSC89854  Ericameria linearifolia B. Castro; L. P. Janeway 2001-4-18 1238 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On edges of low terrace just above riparian corridor paralleling dirt road, adjacent to perennial N-S-trending creek. 268 Comment
  HSC72122  Ericameria linearifolia J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 mi. from its junction with State Route 20. Comment
  JEPS31350  Ericameria linearifolia W. L. Jepson 1932-5-9 16294 Colusa n of Stonyford 365 Comment
  JEPS26165  Ericameria nauseosa var. speciosa Peter H. Raven, R. Snow 1959-9-11 14416 Colusa 0.5 mi s of Snow Mountain 1920 Comment
  JEPS75830  Ericameria nauseosa var. speciosa L. R. Heckard 1974-9-11 3947 Colusa rocky promontory overlooking Fouts Springs, se corner of Snow Mt. Snow Mt., Fouts Springs 1889 Comment
  SEINET251843  Erigeron L. Shultz, J. Shultz 1986-9-20 10226 Colusa 10 miles west of Colusa on Highway 20 Comment
  JEPS80754  Erigeron inornatus var. inornatus L. R. Heckard and J. C. Hickman 1981-7-29 5721 Colusa Spur, about .75 km se Summit Springs; Snow Mt., Summit Springs 1554 Comment
  JEPS73515  Erigeron petrophilus var. petrophilus L. R. Heckard 1972-7-10 3133 Colusa overlooking and 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  JEPS75738  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-10 3899 Colusa e slope East Peak; Snow Mt., East Peak 2103 Comment
  POM257160  Eriodictyon californicum Lincoln Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony creek 2.5 miles E of Bonnie View, Inner N Coast Ranges 518 Comment
  UC1733756  Eriodictyon californicum Kay H. Beach 1940-5-16 647 Colusa Colusa and Lake county line Comment
  RSA60348  Eriodictyon californicum G. R. Campbell 1948-6-18 649 Colusa 2 miles south of Wilbur Springs. Comment
  CHSC112641  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC92835  Eriogonum dasyanthemum D. Isle 2000-6-7 1245 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  CHSC94726  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UC1736002  Eriogonum dasyanthemum Dean W. Taylor 1992-6-10 12693 Colusa Highway 162 Alder Springs Road, ca. 4 miles west from junction in Stony Creek valley 762 Comment
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Feb 23 2009
  UCD163236  Eriogonum dasyanthemum Craig D. Thomsen 2000-6-7 2362 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  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
  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
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  CDA22488  Eriogonum dasyanthemum T. C. Fuller 1958-5-27 Colusa Highway 20, 1.5 miles west of junction with Highway 16. 0 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
  UCD99909  Eriogonum dasyanthemum Grady L. Webster 1977-5-15 7680 Colusa Along Bear Creek, ca. 2 mile W of Route 20 along Wilbur Springs Road. 365 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
  CHSC32218  Eriogonum nervulosum James Jokerst 1980-9-6 1055 Colusa Near Snow Mountain (West). Comment
  UCD55453  Eriogonum nudum Ellen Dean; Gordon Harrington 2006-10-6 3277 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
  CHSC75622  Eriogonum nudum var. nudum Vernon H. Oswald; Lowell Ahart 1999-6-22 9771 Colusa Fouts Spring Rd. (M10) 6.1 mi west of Stonyford-Elk Creek Rd. 548 Comment
  IRVC29687  Eriogonum nudum var. pubiflorum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5031 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
  JEPS75856  Eriogonum spergulinum var. reddingianum L. R. Heckard 1974-9-10 3894 Colusa e ridge of East Peak, Snow Mt. Snow Mt. 2042 Comment
  RSA133246  Eriogonum spergulinum var. reddingianum Peter H. Raven, Richard Snow 1959-9-11 14419 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 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
  UCR44921  Eriogonum tripodum 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
  CHSC117782  Eriogonum tripodum David Isle; Terril Wolt 2016-6-16 2164 Colusa North Coast Range: 3/4 mi NE of Fouts Springs and 1/4 mi WNW of Davis Flat on greenish, rocky serpentine ridge. 549 Comment
  CHSC92594  Eriogonum umbellatum var. bahiiforme David W. Isle 2005-8-1 1155 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile South of Goat Mountain lookout. 1804 Comment
  RSA713163  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa Mendocino National Forest: Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile south of Goat Mountain Lookout. 1805 Comment
  CHSC91046  Eriophyllum lanatum D. Isle 2003-6-12 371 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS 10S 524888E 4345370N, ridgetop. 1816 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-BC308095  Eriophyllum lanatum var. achilleoides Pat Daly; Rudy Galindo 1988-4-16 54 Colusa 3.7 miles west on Goat Mountain Road off of Lodoga-Stonyford Road to Digger Pine Campground 451 Comment
  CAS-BOT-BC308098  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  HSC44471  Eriophyllum lanatum var. achilleoides R. York 1978-4-22 132 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  POM163461  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1926-4-23 6411 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCD38807  Eriophyllum lanatum var. grandiflorum Beecher Crampton 1958-5-19 4813 Colusa Little Stony Creek canyon, west of Ladoga. Comment
  SEINET11850784  Eriophyllum staechadifolium C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  HSC45749  Erodium cicutarium Stephen Plant 1978-4-22 213 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCR212363  Erodium cicutarium Craig D. Thomsen 2000-3-31 2083 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
  HSC31597  Erodium cicutarium Thomas E. Higley 1974-5-5 86 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  UC73402  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City, Sacramento Valley); Sacramento Valley Comment
  UC1487274  Eryngium aristulatum var. aristulatum Yusuf Sheikh and Lincoln Constance 1973-5-12 542 Colusa s. Leesville (on Bear Valley Rd. toward Clear Lake, 1 mi. s. of Brim Rd., 13.3 mi. n. of State Hwy. 20) Comment
  UCR198153  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch, just west of the Hwy 20/Hwy 16 intersection, c. 300 ft uphill to the west of the corral 326 Comment
  CDA12013  Erysimum capitatum G. F. Hrusa 1990-4-8 7665 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  UCD163847  Erysimum capitatum Craig D. Thomsen 2000-5-30 2273 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CAS-BOT-BC40755  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. Comment
  CHSC75599  Erysimum capitatum var. capitatum Vernon H. Oswald; Lowell Ahart 1999-6-22 9776 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Adjacent to meadow at the Lily Pond. 1243 Comment
  RSA101910  Erysimum capitatum var. capitatum G. B. Rossbach, Ruth P. Rossbach 1938-5-31 851 Colusa About 18 miles W of Williams. Comment
  JEPS120998  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  CHSC1751  Erythranthe bicolor L. Oliver 1935-5-3 Colusa 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
  CAS-BOT-BC402661  Eschscholzia caespitosa Mrs. H. C. Cantelow 1936-4-11 s.n. Colusa Bear Creek Canyon Comment
  CAS-BOT-BC402663  Eschscholzia caespitosa Roxana S. Ferris 1926-4-23 6426 Colusa Summit of grade, Williams - Stonyford Road Comment
  CHSC100950  Eschscholzia caespitosa Rodney Lacey 2008-4-1 Colusa Inner North Coast Ranges. Little Stony Creek; on private dirt road adjacent to Goat Mountain Road, near Lodoga-Stonyford Road, approximately 3.2 km west of Lodoga. 398 Comment
  HSC62925  Eschscholzia caespitosa Marla J. Carollo 1979-4-14 36 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20 412 Comment
  RSA388342  Eschscholzia caespitosa subsp. caespitosa Harold Grams 1975-4-12 5 Colusa State Highway 16, 16 miles north of Rumsey Comment
  UCD93924  Eschscholzia californica 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
  SD8240  Eschscholzia californica Brandegee Apr 1889 Colusa Comment
  CAS-BOT-BC5880  Eschscholzia caruifolia Mary Katherine (Mrs.) Brandegee 1889-4-1 s.n. Colusa Leesville Comment
  CHSC42185  Eschscholzia lobbii S. A. Zaitz 1986-4-5 11 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Ck, ca. 18 mi sw of Williams. 321 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
  CHSC59969  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa In field on east side of Bear Valley Road, 10.6 miles (by road) north of junction with State Highway 20. Valley floor of Bear Valley. 381 Comment
  CHSC79501  Euphorbia spathulata B. Castro; L. P. Janeway 2000-5-2 1110 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  JEPS94798  Euphorbia spathulata Vernon Oswald and Lowell Ahart 1998-5-7 9002 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
  UCD164032  Euphorbia spathulata Indya Messier 2016-4-9 6 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella flat. 553 Comment
  UCD57284  Euphorbia spathulata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3655 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
  UCD64248  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2050 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
  UCD64283  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2105 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
  UCD82371  Euphorbia spathulata Robin McMaster 1973-4-15 344 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  UCD57295  Extriplex joaquinana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3666 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  JEPS120963  Festuca microstachys var. microstachys Lowell Ahart 2013-5-1 18696 Colusa Near a small drainage, N of the wash and N side of Hwy 20, just E of the Lake County Line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  HSC48195  Frangula californica subsp. californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3961 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC63015  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville Comment
  CHSC50803  Frankenia salina Vernon Oswald 1990-7-3 4411 Colusa Four Mile Rd ca. 4.5 mi n of Maxwell-Colusa Rd, ca. 6 mi (air) northeast of Maxwell. Along the edge of the road. 27 Comment
  CHSC52632  Frankenia salina James Jokerst 1985-4-24 2495 Colusa Near Lurline Creek. 41 Comment
  POM135670  Frankenia salina Roxana Stinchfield 1916-7-11 120 Colusa Colusa - Williams Road at 'Trough' Comment
  UC931959  Frankenia salina Verne Grant and Alva Grant 1946-8-6 7841 Colusa near Colusa (Butte Outing Gun Club) Comment
  CHSC79774  Fraxinus dipetala L. P. Janeway; B. Castro 2000-5-2 6697 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 256 Comment
  HSC66135  Fraxinus dipetala Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 47 Colusa On Bartlett Springs Rd. Comment
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Aug 13 2014
  UC1051743  Fraxinus dipetala Helen K. Sharsmith 1953-6-20 4299 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CAS-BOT-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
  SEINET10744717  Fraxinus latifolia Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 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 interesection with Forest Service route M10. T17N R8W S25. 1371 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-BC130339  Fritillaria glauca Donald V. Hemphill 1956-5-26 s.n. Colusa 1/4 mi. south of Snow Mt. East 2103 Comment
  CAS-BOT-BC130436  Fritillaria pluriflora Barbara Sherfey 1962-3-1 s.n. Colusa At top of Arbuckle Grade between Arbuckle and Rumsey Comment
  CHSC26609  Fritillaria pluriflora D. W. Isle 1978-3-3 1501 Colusa Stonyford Cemetary Lane ca. 1.5 mi w of Stonyford, s of Fouts Springs Road. 365 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
  UC1179069  Fritillaria pluriflora Herbert L. Mason 1947-3-30 13165 Colusa 0.5 mi e of Lake County Line (on Williams-Lower Lake Highway, western Colusa County); Williams-Lower Lake Highway Comment
  UC765858  Fritillaria pluriflora R. F. Hoover 1939-3-5 3901 Colusa 2 mi s of Stonyford Comment
  UCD139704  Fritillaria pluriflora Jim Nelson Date Unknown s.n. Colusa Wilbur Springs. Comment
  UCR261601  Fritillaria pluriflora Ann Howald 2003-3-26 2293 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.5 miles north of Lodoga, c. 0.2 mi south of Chisolm Cove Group Campground 373 Comment
  HSC62768  Fritillaria purdyi M. Dean Griswold Jr. 1979-4-14 16 Colusa 1067 Comment
  JEPS54480  Galium G. L. Stebbins 1966-6-6 Colusa s Little Stony Creek (just sw of junction with Frenzel Creek); Lovelady Ridge 457 Comment
  HSC48146  Galium andrewsii Thomas W. Nelson, Jane P. Nelson 1978-4-30 3967 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  CHSC43737  Galium andrewsii subsp. andrewsii Vernon Oswald 1986-5-12 2012 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi W of Bear Valley Rd. 487 Comment
  UCD81217  Galium andrewsii subsp. andrewsii Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5554 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. Ridge so the south of Destanella Flat. 522 Comment
  UCD164159  Galium aparine Craig Thomsen 2000-4-28 2266 b Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  JEPS80809  Galium bolanderi L. R. Heckard and J. C. Hickman 1981-7-31 5781 Colusa rocky promontory called Fouts Spring Overlook Snow Mt. (e side of mt) 1783 Comment
  HSC19810  Galium californicum subsp. californicum Lauramay T. Dempster, G. L. Stebbins 1967-10-13 4366 Colusa NW ridge of Goat Mtn., 1.6 mi. SE of Fir Root Camp Comment
  CDA15479  Galium californicum subsp. flaccidum G. F. Hrusa, WTD 1998-6-19 14616 Colusa North Coast Ranges; Goat Mtn. Rd. approx. 1 km. below intersection with USFS Pacific Ridge Rd. (M5). Comment
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS80877  Galium parisiense L. R. Heckard and J. C. Hickman 1980-7-3 5364 A Colusa slopes about Summit Springs (sw slope of mt); Snow Mt. 1554 Comment
  UC1229764  Galium parisiense Francia Chisaki and Helen K. Sharsmith 1959-5-27 1334 Colusa on road leading out of Red Bridge Camp Mill Creek Crossing Comment
  UCD66950  Galium parisiense Ellen Dean; Davis Botanical Society 2008-5-31 4995 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  OBI9920  Galium parisiense Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1334 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  UC1212112  Galium porrigens Francia Chisaki and Gene B. Newcomb 1958-6-19 1166 Colusa on John Smith Road (Goat Mt.-Stonyford Road) Comment
  UCD56687  Galium porrigens Gordon Harrington 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. 572 Comment
  UCR227343  Galium porrigens var. tenue Craig D. Thomsen 2001-5-24 2457 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  CAS-BOT-BC199031  Garrya congdonii C. Hart Merriam 1907-7-23 s.n. Colusa Cook Spgs. Comment
  CAS-BOT-BC199032  Garrya congdonii Milo S. Baker 1947-4-6 11645 Colusa Along Hwy. 20 just E of the Lake-Colusa boundary. Comment
  CHSC39247  Garrya congdonii B. A. Stein 1982-5-2 535 Colusa South end of East park Reservoir. Comment
  SBBG34146  Garrya congdonii R. D. Slayback 1959-3-20 2 Colusa near St Hwy 16, 6 mi NW of Rumsey Comment
  UCD121087  Garrya congdonii Frederic Hrusa 1989-2-7 5806 Colusa 2 miles off Stonyford-Lodoga Rd. up road to Cedar Mtn. Comment
  UCD121090  Garrya congdonii G. F. Hrusa 1996-1-23 12627 Colusa N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Inner North Coast Ranges. 475 Comment
  POM163456  Garrya flavescens subsp. congdonii Roxana S. Ferris 1926-4-23 6456 a Colusa Between Leesville and Stonyford four miles from Stonyford. Comment
  CDA5308  Gaura neomexicana Kingwill Jun 1944 Colusa 0 Comment
  JEPS80143  Gayophytum diffusum subsp. diffusum L. R. Heckard with J. Hickman 1980-7-2 5304 Colusa trail from Summit Springs to Snow Mt. Peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. boundary) 1676 Comment
  JEPS76800  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  CHSC77934  Geranium carolinianum Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 Comment
  JEPS81279  Geranium carolinianum L. R. Heckard and J. C. Hickman 1982-7-5 5890 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UC73425  Geranium carolinianum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City); Sacramento Valley Comment
  CHSC101434  Geranium dissectum David Isle 2007-5-1 1575 Colusa SE of Maxwell approx. 4 miles in riparian natural area just W of irrigation canal adjacent to 'Lakeland' rice fields farmed by William Dirks and Jack Barrett. W of footbridge S of third landing. 30 Comment
  RSA0028445  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UC1614400  Gilia Charles M. Belshaw 1937-4-25 2855 Colusa vicinity Cook's Spring (Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  UC1613521  Gilia capitata Charles M. Belshaw 1937-4-25 2853 Colusa Inner North Coast Range. Vicinity of Cook's Spring, Devil's Ridge. Comment
  UCD63100  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4931 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
  UCD64432  Gilia capitata Craig D. Thomsen 2000-5-11 2323 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
  UC1613303  Gilia capitata Charles M. Belshaw April, 1937 2870 Colusa Inner North Coast Range. Vicinity of Cook's Spring, Devil's Ridge. 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
  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
  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
  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
  JEPS75872  Glyceria elata L. R. Heckard 1974-9-9 3874 Colusa se of Foutch Camp (just ne of rock promontory); Snow Mt. 1920 Comment
  UCD63039  Glycyrrhiza lepidota Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4885 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow close to Bear Creek in uplands. 376 Comment
  SEINET7042569  Gnaphalium canescens A. G. Vestal 1938-9-1 s.n. Colusa Along top of trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  JEPS110101  Gnaphalium palustre Lowell Ahart 2006-8-9 13124 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 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
  UCR261756  Grindelia camporum Ann Howald 2003-5-30 2356 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CAS-BOT-BC305301  Grindelia hirsutula L. R. Abrams 1928-5-8 12585 Colusa 2 miles south of Arbuckle Comment
  CAS-BOT-BC305303  Grindelia hirsutula Doris K. Kildale 1928-5-8 5018 Colusa 3 miles south of Arbuckle Comment
  CAS-BOT-BC305305  Grindelia hirsutula Roxana Stinchfield 1916-6-17 283 Colusa College City Comment
  UC1051714  Grindelia hirsutula Helen K. Sharsmith 1953-6-19 4264 Colusa near confluence North and Middle Fork Stoney Creek (Red Bridge Camp, North Fork Stoney Creek, Middle Fork Stoney Creek); Inner North Coast Ranges, Mendocino Natl Forest, North- Midd 548 Comment
  UCD82539  Grindelia hirsutula Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5692 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
  UCD85150  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa 3.5 miles south of Colusa. Comment
  CAS-BOT-BC302201  Harmonia hallii G. L. Stebbins 1971-6-6 8013 Colusa South end of Walker Ridge, near Clyde Mine 914 Comment
  JEPS94706  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Vallyy and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  JEPS94768  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  UCD159338  Harmonia hallii D. S. Park; E. Dean 2010-6-5 122 Colusa Walker ridge, Cold Spring Mt. Abundant by road. 692 Comment
  UCD82440  Helenium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 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
  CHSC106249  Helenium bigelovii B. Castro; L. P. Janeway 2001-6-3 1258 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. 882 Comment
  UCD170090  Helianthemum scoparium Jack Alderson 2016-9-3 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5100 feet (1555 m) south of the confluence of Brophy Creek with Bear Creek. 472 Comment
  JEPS110413  Helianthus bolanderi Lowell Ahart 2006-8-9 13097 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UC194952  Helianthus bolanderi H. M. Hall 1916-8-16 10267 Colusa near Williams Comment
  UC71768  Helianthus bolanderi H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD163650  Helianthus bolanderi Craig Thomsen 1998-6-10 1948 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD61452  Helianthus bolanderi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3897 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 1/2 mile SW of parking lot. North of Eula Canyon. 420 Comment
  JEPS120804  Heliotropium curassavicum Lowell Ahart 2013-10-1 19096 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCD55469  Heliotropium curassavicum Ellen Dean; Gordon Harrington 2006-10-6 3293 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
  UCR201552  Heliotropium curassavicum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14261 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UCD70229  Heliotropium curassavicum var. oculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual plant communities on serpentine temporal vernal pools. 370 Comment
  SD22371  Heliotropium curassavicum var. oculatum Richard Neil 1938-6-20 Colusa Grimes Comment
  JEPS80141  Hemizonella minima L. R. Heckard with J. Hickman 1980-7-2 5301 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake County border) 1661 Comment
  CAS-BOT-BC306024  Hemizonia congesta subsp. clevelandii H. M. Hall 1930-10-3 12937 Colusa Two miles south of Stonyford Comment
  CAS-BOT-BC306027  Hemizonia congesta subsp. clevelandii A. A. Heller 1916-6-6 12358 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  UCD146726  Hemizonia congesta subsp. clevelandii G. F. Hrusa 1998-6-19 14596 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
  CHSC61405  Hemizonia congesta subsp. luzulifolia Vernon H. Oswald 1993-8-16 5808 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N end of E edge of Tract 41. Also in the south portion of the refuge. 25 Comment
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  UCD82492  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5680 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
  UCR281726  Hemizonia congesta subsp. tracyi David Isle, Frank Pendell 2014-6-16 2136 Colusa North Coast Range, c. 2 miles west of Stonyford on the Pendell Ranch, southeast of the home of Frank and Sheri Pendell c. 0.25 mile and northwest of the Stonyford Cemetary, c. 200 yards 384 Comment
  CHSC115621  Hemizonia congesta subsp. tracyi David Isle; Frank Pendell 2014-6-16 f 2136 Colusa North Coast Range: 2 miles W of Stonyford on Pendell Ranch. SE of Pendell home 1/4 mile; NW of Cemetery 200 yds. (GPS= Pendell home S of Fouts Sp. Rd. 50 yds.); 10S-0536687E, 4357699N). Comment
  JEPS75707  Heracleum lanatum Alice Q. Howard 1972-7-10 10 Colusa stream crossing trail between Fouts Camp and Box Springs (lower of 2 wet places along trail on n. side of ridge separating Trout & Paradise Creeks, Snow Mt.); Snow Mt. 1600 Comment
  UCR261649  Hesperevax sparsiflora var. sparsiflora Ann Howald 2003-4-24 2319 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CHSC79845  Hesperocnide tenella B. Castro; L. P. Janeway 2000-5-4 1129 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  SD40656  Hesperocyparis sargentii Carl B. Wolf, E. R. Johnson 1934-10-15 Colusa Cook Springs (western part of county) 550 Comment
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  CDA28487  Hesperolinon californicum T. C. Fuller 1958-5-27 3686 Colusa Highway 20, 0.7 mile west of junction with Hwy 16. 0 Comment
  CDA28489  Hesperolinon californicum T. C. Fuller 1958-6-16 Colusa Hillside above Highway 20, 2 miles west of Cache Creek Bridge. 0 Comment
  UC1552829  Hesperolinon californicum Frederica Bowcutt 1985-5-5 511 Colusa nw Wilbur Springs; Big Valley Shale Barrens Comment
  CHSC83165  Hesperolinon disjunctum Beecher Crampton 1995-6-4 10323 Colusa Colusa-Lake County Border: State Highway 20. Comment
  JEPS120982  Hesperolinon disjunctum Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18635 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
  UC1212487  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca one mi above Diversion Dam of Big Stony Creek (near road from Stoneyford to Fouts Springs); Inner North Coast Ranges, Mendocino National Forest; above Diversion Dam of Big Stoney Creek, Mendocino National Forest, Colusa Co. 518 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
  UC1552831  Hesperolinon disjunctum Frederica Bowcutt 1985-5-5 507 Colusa ca 1 mi nw Wilbur Springs Comment
  UC1601227  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 a Colusa Cook Springs Inner North Coast Ranges 548 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
  UCR45096  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  UCR71414  Hesperolinon disjunctum H. K. Sharsmith 1965-6-23 5529 Colusa Inner North Coast Ranges, c. 1/4 mi. east of Cook Springs 534 Comment
  CAS-BOT-BC176222  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa Near road from Stoneyford to Fouts Springs, ca. one mile above Diversion Dam of Big Stoney Creek, Mendocino National Forest 518 Comment
  RSA151803  Hesperolinon disjunctum H. K. Sharsmith 1951-7-13 4031 Colusa Fouts Springs, near Mill Creek at junction with road to Black Diamond Ridge, Mendocino National Forest. 457 Comment
  SBBG128806  Hesperolinon disjunctum L. Ahart, J. Dittes, J. Guardino 2013-4-26 18635 Colusa rocky serpentine outcrop on N side of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  UCD110516  Hesperolinon disjunctum Marilyn Ivey 1973-5-19 55 Colusa 1.5 miles up Wilbur Springs Road north off of State Highway 20. Comment
  SD8554  Hesperolinon drymarioides Katherine Curran Aug 1884 Colusa Epperson's Comment
  UC1212304  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa n canyon slope overlooking Cook Springs; Inner North Coast Ranges 548 Comment
  SBBG83904  Hesperolinon micranthum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd 670 Comment
  UCD66692  Hesperolinon micranthum Craig D. Thomsen 2000-6-23 2373 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
  RSA0049696  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 36 Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  JEPS60199  Heterocodon rariflorum L. R. Heckard 1969-5-28 2235 Colusa about 6 air mi w Stonyford (along Stony Creek at Fout Springs); Stony Creek, Fout Springs 518 Comment
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CAS-BOT-BC203371  Hibiscus lasiocarpos var. occidentalis Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  CAS-BOT-BC203372  Hibiscus lasiocarpos var. occidentalis Verne Grant; Alva Grant 1946-8-6 7837 Colusa Butte Creek 1 mile north of Butte Outing Gun Club, near Colusa Comment
  CHSC25319  Hibiscus lasiocarpos var. occidentalis Hayes; Warner, Schlising 1977-8-23 49 Colusa Along Putnam Rd., where this road reaches the Butte Creek Drainage, off of Gridley road 5. 50 Comment
  CHSC32210  Hieracium greenei James Jokerst 1980-8-7 1061 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  CAS-BOT-BC383132  Hippuris vulgaris Andrew Townesmith; Karen M. Meyer 2007-8-7 914 Colusa Mendocino National Forest, Grindstone Ranger District. Lily Pond, off Forest Service road 17N02, 1.7 miles SW of intersection with Forest Service route M10 1264 Comment
  UC1183425  Hippuris vulgaris J. M. Tucker and L. K. Mann 1959-5-30 3528 Colusa ca. 1/4 mi. n.w. Lower Letts Valley (and ca. 4 mi. (airline) n. of Goat Mt. Lookout, Mill Valley); Mill Valley 1219 Comment
  CAS-BOT-BC320319  Holocarpha virgata H. M. Hall 1930-9-25 12893 Colusa About 4 miles south of Arbuckle Comment
  SEINET10758259  Holocarpha virgata subsp. virgata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 907 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Wolf Creek OHV staging area, off Forest Service route M10, 4.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W. 452 Comment
  UC194239  Holocarpha virgata subsp. virgata H. M. Hall 1916-8-16 10270 Colusa near Arbuckle Comment
  CAS-BOT-BC152578  Holodiscus discolor var. discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade about 3 miels west of Leesville Comment
  CHSC110864  Hordeum brachyantherum David Isle 1989-5-14 1995 Colusa Stony Creek Watershed. Pendell Ranch ~2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road; ~150 yds south of Pendell home. 384 Comment
  HSC10153  Hordeum brachyantherum C. R. Phillips 1964-3-30 Colusa Colusa, vacant lot Comment
  UCD70230  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Perennial plant communities close to serpentine temporal vernal pools. 370 Comment
  UC1745700  Hordeum brachyantherum subsp. brachyantherum Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1391 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  JEPS475  Hordeum brachyantherum subsp. californicum W. L. Jepson 1938-6-9 18956 Colusa w slope of mountains between Indian Valley, Lake County and Bear Valley, Colusa County; Indian Valley, Bear Valley 579 Comment
  JEPS81292  Hordeum brachyantherum subsp. californicum L. R. Heckard and J. C. Hickman 1982-7-5 5904 Colusa s side Snow Mountain (slope below (s of) area, Summit Springs); s side Snow Mountain, Summit Springs 1500 Comment
  UCD18841  Hordeum brachyantherum subsp. californicum Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 148 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
  SEINET10598961  Hordeum californicum Roxana S. Ferris 1917-1 Ferris 518 Colusa Comment
  CHSC112265  Hordeum depressum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18637 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
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  CHSC107165  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. Large +- alkaline vernal pool/marsh; mucky clay soil. North edge of large wetland. 49 Comment
  CHSC80502  Hordeum marinum subsp. gussoneanum Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD163872  Hordeum marinum subsp. gussoneanum Craig D. Thomsen 2000-3-31 2173 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
  SEINET3271561 Image available Hordeum murinum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14371 Colusa Inner North Coast Range Foothills; along CA-20, 14.3 miles southwest of Williams 375 Comment
  CAS-BOT-BC284750  Hordeum murinum subsp. glaucum Roxana S. Ferris 1917-4-12 515 Colusa 4 miles East of Williams 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
  JEPS80220  Hordeum murinum subsp. leporinum L. R. Heckard and J. Hickman 1980-7-3 5376 Colusa w Summit Springs (sw slope Snow Mountain); sw slope Snow Mountain 1554 Comment
  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
  UCD82589  Horkelia californica var. elata Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2734 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  SEINET10947309  Horkelia tenuiloba Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 915 Colusa Mendocino National Forest, Grindstone Ranger District. Lily Pond, off Forest Service road 17N02, 1.7 miles SW ofinteresection with Forest Service route M10. T17N R8W S24. 1264 Comment
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Aug 17 2018
  UCD67123  Hosackia oblongifolia Ellen Dean; Davis Botanical Society 2008-5-31 5055 Colusa west of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs. 787 Comment
  RSA730240  Hypochaeris glabra R. R. Halse 2007-3-25 7122 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. 100 Comment
  UCD82460  Hypochaeris glabra Craig Thomsen; G. Harrington 2009-5-12 2838 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD135955  Ibicella lutea Barry Rice 2012-6-11 BR 120601 Colusa near Hwy 20, 10 km west of I-5. 50 Comment
  RSA0013871  Ibicella lutea Richard Snow 1958-8-3 671 Colusa Near State Highway 20, on the road to Leesville. Comment
  RSA0013873  Ibicella lutea John H. Thomas 1960-8-29 8847 Colusa About 11 miles SW of Williams along Highway 20. Comment
  JEPS94211  Iris macrosiphon Vernon Oswald and Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Road 2.2 mi w of Bear Valley Road (0.7 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  SEINET3875317  Iris macrosiphon Thomas E. Higley 1974-5-4 066 Colusa 3/4 miles north of T junction of Indian Valley.; 0 853 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
  CDA19079  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958964 Colusa Sacramento Valley; Near the junction of I-5 Southbound and Husted Rd, Williams. 0 Comment
  UCD57305  Iva axillaris Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3676 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
  CHSC32202  Ivesia gordonii James Jokerst 1980-8-8 1076 Colusa North Coast Ranges. Near Snow Mountain (west). 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
  CHSC83445  Juncus balticus Bill Maslach 2001-6-6 12 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; 5 meters downstream of bridge marked '1930.' On creek bank. 175 Comment
  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
  UCD65641  Juncus balticus Craig D. Thomsen 2000-4-28 2178 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS80247  Juncus bolanderi L. R. Heckard and J. C. Hickman 1980-9-15 5425 Colusa w of Summit Springs; Snow Mt. 1554 Comment
  CHSC107974  Juncus bufonius var. bufonius B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1859 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  CHSC86032  Juncus bufonius var. bufonius Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 137 Comment
  JEPS121120  Juncus bufonius var. bufonius Lowell Ahart 2013-5-1 18691 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
  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
  JEPS80271  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5454 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  JEPS80285  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5459 Colusa ne slope West Peak (cirque area between peaks); Snow Mt. 2011 Comment
  JEPS73494  Juncus laccatus L. R. Heckard 1972-7-10 3107 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  JEPS75720  Juncus laccatus L. R. Heckard 1974-9-9 3852 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  UCD82125  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5654 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
  UCD82439  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 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
  CHSC118858  Juncus phaeocephalus var. paniculatus David Isle; Frank Pendell 2017-5-17 2174 Colusa Footheills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank andsheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile 381 Comment
  CHSC97128  Juncus usitatus Lowell Ahart 2007-7-7 14258 Colusa South of the wire fence, on the south side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  CHSC107172  Juncus xiphioides L. P. Janeway; 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. Large +- alkaline vernal pool/marsh; mucky clay soil. In and adjacent to a shallow swale that drains north into the marsh which is 3 m lower in elevation. 52 Comment
  CDA20252  Juncus xiphioides G. D. Barbe, Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  CAS-BOT-BC80913  Juniperus californica Roxana S. Ferris 1926-4-23 6456 Colusa 4 miles from Stanford on the Leesville Road Comment
  CHSC45225  Juniperus californica Lowell Ahart 1971-6-10 78 Colusa North-east of Sites. 76 Comment
  UCD163315  Juniperus californica Craig D. Thomsen 1997-4-13 1904 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD63024  Juniperus californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4676 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. 493 Comment
  UCD70298  Juniperus californica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Open California juniper woodland (Juniperus californica). 420 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
  RSA718197  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 422 Comment
  UCD164166  Koeleria macrantha Craig Thomsen 2001-5-6 2558 Colusa Wilbur Hot Springs. Comment
  UCD85747  Koeleria macrantha Beecher Crampton 1958-5-19 4801 Colusa 5.8 miles south of Lodoga. Comment
  UCD82476  Lactuca Craig Thomsen; G. Harrington 2009-5-12 2854 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD66874  Lactuca saligna Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5077 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
  CAS-BOT-BC340495  Lactuca serriola Roxana Stinchfield 1916-7-11 477 Colusa Sycamore Slough road Comment
  CHSC70966  Lagophylla minor Vernon Oswald; Lowell Ahart 1998-5-7 8998 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  HSC96892  Lagophylla minor L. Ahart 2006-6-11 12667 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
  JEPS85534  Lagophylla minor L. R. Heckard 1969-5-28 2232 A Colusa Letts Valley Rd. ca 8 mi sw Stonyford (NE slope of Potato Hill); Potato Hill 762 Comment
  UCD163715  Lagophylla minor Craig Thomsen 1999-5-10 2027 Colusa Colusa County. BLM Bear Creek Ranch. Near intersection of Hwy 16 and Hwy 20. About 0.5 miles south of Hwy 20. Comment
  UCD82519  Lagophylla minor Craig Thomsen; G. Harrington 2009-5-12 2876 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  CAS-BOT-BC341470  Lagophylla ramosissima L. R. Abrams 1928-5-8 12586 Colusa 2 miles south of Arbuckle Comment
  UCD61466  Lagophylla ramosissima Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3912 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  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
  CHSC77915  Lasthenia californica Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  HSC48034  Lasthenia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3939 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC324484  Lasthenia ferrisiae Alice Eastwood 1921-4-11 10232 Colusa Colusa Comment
  UC725317  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 mi n Maxwell Comment
  CHSC107951  Lasthenia fremontii B. Castro; T. Boullion 2011-4-20 1835 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  CAS-BOT-BC353479  Lasthenia fremontii Mrs. Alvin Seale 1932-4-17 s.n. Colusa unspecified 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
  CAS-BOT-BC352923  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
  UCD133750  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa On west side of Bear Valley Road, 11 miles (by road) north of junction with State Highway 20. 365 Comment
  CHSC8124  Lasthenia glabrata J. G. Moore 1969-4-12 65 Colusa In orchard 300 yds. s of junction with Hwy. 20 on Hwy. 16, e side of road. 106 Comment
  UCD163320  Lasthenia glabrata Craig D. Thomsen 1997-4-20 1919 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  CDA32830  Lasthenia glabrata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC90077  Lasthenia glabrata C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 45 Colusa 100 m off Bear Valley Rd., 1.2 mi. S of junction with Walker Ridge Rd. 409 Comment
  CAS-BOT-BC328107  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa Tule land 3 miles W of Colusa Comment
  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
  UC1049545  Lasthenia glabrata subsp. glabrata Rimo Bacigalupi 1950-4-16 3124 Colusa Bear Valley Comment
  UCR247331  Lasthenia glabrata subsp. glabrata Peter Rubtzoff 1978-5-14 9167 Colusa Inner North Coast Range, Bear Valley Road, c. 4-5 miles south of junction of the road to Ft. Ross State Historic Park, Bartlett Springs Road 405 Comment
  CAS-BOT-BC353439  Lasthenia glabrata subsp. glabrata Ella Dales Cantelow 1936-4-11 1151 Colusa Jct. William Hy, Bear Creek Canyon Comment
  UCD15423  Lasthenia gracilis Margit Sands 1985-4-13 26 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
  UCD66913  Lasthenia gracilis 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. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. Center of basin. 487 Comment
  UCD67937  Lasthenia gracilis Nancy Vucinich 1978-4-8 8 Colusa Bear Valley, 10.3 miles N. of junction of Highways 16 and 20. Growing in open meadow, foothill woodland. Growing in clusters. Stems and leaves softly pubescent. Slender annual, yellow flowers. 396 Comment
  JEPS80788  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1981-7-30 5761 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1584 Comment
  UCD81710  Lathyrus jepsonii var. californicus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5716 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
  HSC95805  Lathyrus vestitus subsp. vestitus A. Skelly, B. Bletcher, G. McCabe 1996-3-30 10 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
  JEPS88897  Lathyrus vestitus var. vestitus Vernon H. Oswald and Lowell Ahart 1994-4-6 6070 Colusa 0.3 mi s of Sullivan Creek Bridge (Goat Mountain Rd, sw of Digger Pine Flat, s of Stonyford); Goat Mountain Rd 487 Comment
  CHSC55474  Layia chrysanthemoides Barbara Adams 1991-4-6 13 Colusa Ca 0.3 mi west of junction of Hwys 20 and 16, south side of Bear Creek, ca 18 mi southwest of Williams. 321 Comment
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  POM284945  Layia chrysanthemoides Lyman Benson 1935-3-27 6341 Colusa Williams; Mt. Range: Inner N Coast; Watershed: Sacramento River 61 Comment
  UCD15435  Layia chrysanthemoides Lisa Montang 1985-4-13 3 Colusa California, Colusa Co.; Bear Valley, 3.8 miles north of Wilbur Springs Road and Highway 20 intersection. 390 Comment
  HSC90060  Layia fremontii C. Baldwin, A. Hiss, P. Reynolds 1990-4-15 51 Colusa Bear Valley 409 Comment
  UCR261738  Layia gaillardioides Ann Howald 2003-4-23 2305 Colusa Inner North Coast Ranges, Bear Valley Road, c. 1.5 miles north of intersection with Bear Valley Grade/Old Wilbur Road 395 Comment
  CHSC65801  Layia platyglossa L. P. Janeway; B. Castro, Linnea Hanson, Beth Corbin, Kim Earl 1995-4-28 4761 Colusa Southern end of Bear Valley just west of where the road crosses Bear Creek. 396 Comment
Read comments
May 24 2013
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  UCR206849  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-3-11 14358 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC380898  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CDA8151  Layia platyglossa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  SEINET11447842 Image available Layia platyglossa M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  CAS-BOT-BC329324  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  CHSC91515  Layia septentrionalis D. Isle 1995-4-30 391 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt. Rd. (Little Stony Rd.), 5.1 mi. out from jct. with Stonyford-Lodoga Rd. and just W of Sullivan Creek Bridge. 487 Comment
  UC761855  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey-Arbuckle road Comment
  UC761877  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UCR261680  Layia septentrionalis Ann Howald 2003-4-23 2311 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 0.2 mi north of intersection with East Ruby King Road 425 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
  CAS-BOT-BC527263  Lemna gibba A. A. Heller; H. E. Brown 1902-5-19 5571 Colusa Near Colusa Comment
  JEPS127105  Lemna minuta Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20723 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
  CHSC46882  Lemna trisulca Vernon Oswald 1989-9-12 4005 Colusa Lily Pond near Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. In pool at the outlet of the 'Lily Pond. 1341 Comment
  CAS-BOT-BC527301  Lemna trisulca J. M. Tucker; L. K. Mann; John Tothill 1959-5-30 3532 Colusa On small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley and ca. 4 airline miles north of Goat Mountain Lookout 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
  CHSC79481  Lepidium dictyotum var. acutidens L. P. Janeway; B. Castro 2000-3-23 6636 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CHSC111210  Lepidium latifolium David Isle 2013-9-23 2050 Colusa Salt Creek N of Dennis Dr. bridge; Isle property. Comment
  CAS-BOT-BC89759  Lepidium latipes Roxana S. Ferris 1917-4-12 532 Colusa 4 miles east of Williams. Comment
  UC398784  Lepidium latipes Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC89888  Lepidium nitidum Roxana S. Ferris 1917-4-12 719 Colusa 4 miles east of Williams. Comment
  CHSC52006  Lepidium nitidum Camille M. Corda 1982-4-12 17 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, 100 ft from n side of Hwy 20, ca. 18 mi sw of Williams. 321 Comment
  CAS-BOT-BC12797  Lepidium perfoliatum A. S. Strichfield 1926-4-1 s.n. Colusa Near Sycamore. Comment
  CHSC79790  Leptosiphon bicolor L. P. Janeway; B. Castro 2000-5-1 6688 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  HSC83341  Leptosiphon bicolor Clinton C. Shock 1980-5-3 57 Colusa Bear Valley, 12 mi. N of Hwy. 20 384 Comment
  UCD14331  Leptosiphon bicolor G. Robinson 1984-4-21 4 Colusa Colusa Co.; Bear Valley, ca. 40 meters west of Wilber Springs Road, east of creek, 3.2 miles north of Highway 20; 390 Comment
  UCD55171  Leptosiphon bolanderi Kim E. Steiner 1978-4-29 202 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 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
  HSC47564  Leptosiphon ciliatus J. P. Smith, J. O. Sawyer 1978-4-29 9796 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  HSC85855  Leptosiphon filipes Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  CHSC1269  Leptosiphon parviflorus V. Holt 1935-5-12 Colusa Stonyford. Comment
  UCD63017  Leptosiphon parviflorus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4669 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. 404 Comment
  UCD81216  Leptosiphon parviflorus Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5553 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. Top of ridge to the E of Destanella Flat. 578 Comment
  UCD118988  Leptosiphon parviflorus Robert E. Preston 1995-6-2 869 Colusa Walker Ridge. 1005 Comment
  UC1051736  Lesquerella occidentalis subsp. occidentalis Helen K. Sharsmith 1953-6-20 4291 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  UCD163716  Lessingia Craig Thomsen 1999-5-10 2008 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  NY180562  Lessingia adenophora M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  UCD70252  Lessingia micradenia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  CAS-BOT-BC341801  Lessingia nemaclada Peter H. Raven; R. Snow 1959-9-11 14425 Colusa About 2 miles south-east of Happy Camp 762 Comment
  CHSC77543  Lessingia nemaclada Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  NY180585  Lessingia nemaclada M. K. Curran 1884-1 s.n. Colusa At Epperson's 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
  UCD66535  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCR227341  Lessingia nemaclada Craig D. Thomsen 2000-6-23 2400 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
  UCR227342  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 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
  CAS-BOT-BC341802  Lessingia nemaclada Walter Knight; Irja Knight 1963-9-23 113 Colusa Between Leesville and Wilbur Springs Comment
  RSA758207  Lessingia ramulosa Doug Goldman 2005-7-23 3569 Colusa East side of Wilbur Springs Road, about 1.35 miles west of the intersection with Bear Valley Road and just east of Sulphur Creek. Wilbur Springs Resort. 415 Comment
  UCD58177  Lessingia ramulosa Gordon Harrington 2007-5-31 68 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
  UCD66708  Lessingia ramulosa Craig D. Thomsen 2001-5-24 2507 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.17 and 2.25. 342 Comment
  UCD84559  Lessingia ramulosa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6084 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  JEPS43214  Lewisia rediviva W. L. Jepson 1932-5-7 16280 Colusa Lodoga 457 Comment
  JEPS15551  Lewisia triphylla G. Thomas Robbins with L. R. Heckard 1956-7-25 3708 Colusa meadow along trail due s, skirting e base of ridge forming Snow Mt. West Snow Mt. East; Snow Mt. West 1981 Comment
  CAS-BOT-BC444476  Lewisia triphylla G. Thomas Robbins; L. R. Heckard 1956-7-25 3708 Colusa Along trail due south of Snow Mt. East and skirting the eastern base of the ridge forming Snow Mt. West 2042 Comment
  UCD163658  Leymus triticoides Craig Thomsen 1998-6-10 1956 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC53964  Limnanthes douglasii subsp. nivea Vernon H. Oswald 1991-4-21 4517 Colusa Lodoga Stonyford Rd, ca. 2 mi south of Stonyford. Along drainages in pastures. 371 Comment
  UCD33941  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9173 Colusa Colusa County, 4 miles N.W. of Lodoga by road. Comment
  JEPS19624  Limnanthes douglasii subsp. rosea W. L. Jepson 1932-5-7 16265 Colusa Indian Valley; w Colusa Co. Comment
  UCD66941  Limosella acaulis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5090 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
  JEPS58265  Linanthus bolanderi W. L. Jepson 1932-5-8 16269 Colusa Lodoga, w Colusa Co. Lodoga 457 Comment
  CDA11404  Linanthus ciliatus G. F. Hrusa, K. van Katwyk 1995-4-22 12125 Colusa Inner North Coast Ranges; Approx. 3 m. NW of Hwy 20 on Leesville Rd. Comment
  UC71654  Linanthus ciliatus Miss Alice King 1905-1 Colusa College City Comment
  UC907804  Linanthus dichotomus Herbert L. Mason 1941-4-5 12407 Colusa 1 mi s Stonyford Comment
  UCD118534  Linanthus dichotomus Beecher Crampton 1958-4-21 9172 Colusa 4 miles NW of Lodoga (by road). Comment
  JEPS94194  Linanthus parviflorus Vernon Oswald and Lowell Ahart 1998-5-7 9006 .1 Colusa Bartlett Springs Rd. 2.1 mi. w. of Bear Valley Rd. and 0.8 m,i. e. of Sawtelle Valley & Grapevine Flat rds. 524 Comment
  UC618381  Linanthus parviflorus Alice Eastwood and John Thomas Howell 1938-5-16 5630 Colusa Lake-Colusa county line, on road to Williams 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
  UC1142700  Lithophragma Rimo Bacigalupi with G. Ledyard Stebbins and Peter Kamb 1950-4-16 3111 Colusa 4 mi s Ladoga (and 6 mi nnw of Leesville, along Little Indian Creek); Indian Valley, Little Indian Creek 396 Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  CAS-BOT-BC269050  Lolium perenne Roxana Stinchfield 1916-6-17 491 Colusa Road to Tule near College City Comment
  UCD143424  Lomatium Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  UCD15294  Lomatium Claire Warshaw 1985-4-10 13 Colusa along Bear Valley Road, 4.5 miles northwest form intersection with Highway 20. 390 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
  OBI54946  Lomatium ciliolatum var. hooveri Robert F. Hoover 1941-5-2 4987 Colusa Just E of Lake Co. line on Williams-Clear Lake hwy Comment
  HSC103588  Lomatium ciliolatum var. hooveri Thomas W. Nelson, Jane Nelson 1981-4-16 6412 Colusa Along Bartlet Springs-Bear Valley Rd., ~ 100 yds. from Bear Valley 610 Comment
  CHSC42602  Lomatium hooveri Vernon Oswald 1986-5-12 2005 Colusa Brim Rd. (Bartlett Springs Rd.) 1.5 mi w of Bear Valley Rd. 441 Comment
  CHSC70858  Lomatium hooveri Vernon Oswald; Lowell Ahart 1998-4-21 8943 Colusa Stonyford-Logoda Rd. 3.7 mi south of Stonyford. 384 Comment
  LA90233  Lomatium hooveri Lincoln Constance; 1965-4-13 3756 Colusa Between Clear Lake Oaks and Williams, Highway 20, 2.7 mi. W of Highway 16 548 Comment
  UC1178993  Lomatium hooveri Herbert L. Mason 1947-3-30 13164 a Colusa 0.5 mi E of Lake Co. line on Williams-Lower Lake Highway western Colusa Co. Comment
  UC765513  Lomatium hooveri R. F. Hoover 1941-5-2 4987 Colusa just e. Lake Co. line (on Williams-Clear Lake hwy.) Comment
  UCD110811  Lomatium hooveri Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD56686  Lomatium hooveri Gordon Harrington 2007-3-25 5 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. 558 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
  RSA0060080  Lomatium macrocarpum Richard R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 miles south of Logoda; Indian Valley. 425 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
  JEPS80091  Lomatium macrocarpum L. R. Heckard with J. Hickman 1979-6-16 5099 Colusa n. of meadow just w. of West Peak Snow Mt. 1965 Comment
  UC1053450  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  SEINET13944634 Image available Lomatium tomentosum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  CHSC81211  Lomatium utriculatum Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  JEPS16221  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UCD163680  Lomatium utriculatum Craig Thomsen 1999-4-15 1981 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  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
  UCD65645  Lomatium utriculatum Craig D. Thomsen 2000-4-28 2182 -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
  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
  SEINET13944679 Image available Lomatium utriculatum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  SEINET215143  Lomatium utriculatum Linda Lea Ferwerda 1968-5-4 Colusa Wilbur springs road 8 miles northwest from its junction with State highway 20 408 Comment
  UCD40909  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa 9 miles north of Hwy 20 on Bear Valley Road. About 100 yards into field on west roadside. Comment
  UC1299566  Lonicera interrupta Freed W. Hoffman 1948-6-29 2505 Colusa crossing at North Fork Stony Creek North Coast Ranges Comment
  JEPS108723  Lotus corniculatus Lowell Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS86626  Lotus denticulatus L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6706 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1500 Comment
  UCR257975  Lotus grandiflorus Ellen Dean, Craig D. Thomsen, Gordon Harrington, R. Wilmarth, R. Wenk 2010-6-2 6045 Colusa Walker Ridge, along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 770 Comment
  JEPS101802  Lotus grandiflorus var. grandiflorus Dean W. Taylor 1998-6-23 16705 Colusa Walker Ridge; ; Walker Ridge, along BLM access road 929 Comment
  RSA516411  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. Comment
  HSC48166  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3930 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS80180  Lotus humistratus L. R. Heckard with J. Hickman 1980-7-3 5332 Colusa just w Summit Springs (sw Snow Mt., ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1548 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
  UC454099  Lotus purshianus var. purshianus H. P. Chandler 1905-10-14 Colusa Princeton Comment
  UCD65955  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 67 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. Glenn-Colusa Irrigation District West Lateral Canal at western refuge boundary, public auto tour route. 13 Comment
  UCD56933  Lupinus albifrons Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3535 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CHSC62843  Lupinus albifrons var. collinus Vernon H. Oswald; Lowell Ahart 1994-3-23 6022 Colusa Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford. 490 Comment
  UCD83748  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 b Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  CDA11420  Lupinus bicolor G. F. Hrusa, K. van Katwyk 1995-4-22 12141 Colusa Inner North Coast Ranges; Side of Leesville Rd. approx. 4 m. NW of Hwy. 20. Comment
  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
  RSA724140  Lupinus bicolor Richard R. Halse 2002-3-21 6131 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET5320895  Lupinus bicolor Unknown 2002-3-21 6131 Colusa Williams; By junction of 5th Street and B Street 20 Comment
  SEINET5328111  Lupinus bicolor R. R. Halse 2002-3-21 6131 Colusa Williams; by junction 5th St. and B St. 24 Comment
  UCD64250  Lupinus bicolor Craig D. Thomsen 2000-3-31 2052 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
  UCR233443  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2011-4-1 17131 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 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
  HSC36907  Lupinus densiflorus var. aureus John Rehling, Robert M. Specht 1976-3-26 172 Colusa 2 1/2 mi. E of Leesville on the Leesville Rd. to Williams Comment
  POM163463  Lupinus densiflorus var. aureus Roxana S. Ferris 1926-4-23 6415 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  SEINET10838182  Lupinus densiflorus var. aureus J. P. Kroessig 1977-4-16 Kroessig 9 Colusa Corolla yellow-white, pleasantly scented. Large population ca. 0.3 Mi. Sw of Jct of hwys 20 and 16, s side of bear creek, ca 18 mi. Sw of williams. Wilbur Springs quad, 15'. S central border of sec 36, t14n, r5w. Open foothill Woodlands. 322 Comment
  SEINET10870982  Lupinus densiflorus var. aureus Lison 1987-4-26 LISON 671 -1 Colusa 15.7 miles s of stonyford. Lessville - lodogo road. Grassy slope. Corolla Yellow Comment
  SEINET12161687  Lupinus densiflorus var. aureus Unknown 1977-1 20 Colusa ca 10 m N of Salt Creek, Salt Canyon, Hwy 20, 16kmWSW of Williams. WilburSpringsQuad. seebelow 143 Comment
  UC71650  Lupinus formosus var. robustus Miss Alice King 1905-1 Colusa College City Comment
  UC73241  Lupinus formosus var. robustus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD107778  Lupinus formosus var. robustus D. E. Breedlove 1963-4-20 4624 Colusa 11 miles W of Arbuckle on the Rumsey-Arbuckle Road. Comment
  JEPS104139  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the e and w side of Bear Valley Rd, ca 1/4 mi n of the intersection of Bear Valley Rd and Wilber Springs Rd and bridge. 379 Comment
  JEPS98385  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads 411 Comment
  UC1299680  Lupinus luteolus Freed W. Hoffman 1949-9-25 3151 Colusa Bear Valley; North Coast Ranges, Bear Valley Comment
  RSA761032  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Road to Goat Mountain Lookout 0.4 miles south of Route M-10 (Bear Creek-Fouts Spring Road) at head of South Fork Stony Creek, about 12 air mile west-southwest of Stonyford. 1372 Comment
  SBBG122950  Lupinus luteolus B. Ertter 1989-7-1 8616 Colusa rd to Goat Mtn lookout, 0.4 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1371 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
  UC1234601  Lupinus microcarpus var. densiflorus Peter H. Raven 1962-5-31 17910 Colusa State Highway 20, 2.5 mi e Lake County line 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
  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
  RSA659209  Lupinus microcarpus var. densiflorus R. Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd., 4.4 mi N Leesville. 457 Comment
  SBBG114088  Lupinus microcarpus var. densiflorus R. Riggins 1982-5-30 1448 Colusa Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  SEINET239852  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1 /20 Colusa Roadside Ladoga-Leesville Road. 4.4 miles north of Leesville. 457 Comment
  HSC14931  Lupinus pachylobus D. R. Junell 1965-4-18 30 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  HSC45734  Lupinus polycarpus M. Alcasas 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC86906  Lupinus subvexus var. subvexus Terry Hines, Ellen Purcell, N. Williams 1988-4-17 58 Colusa 1.3 mi. S on Bear Valley Rd. from corner of Brim Rd. 396 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  HSC45690  Lupinus succulentus Patricia Shesgreen 1978-4-22 28 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD56925  Lupinus succulentus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3528 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  UCR233449  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  SEINET10490294  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 Nelson 3963 Colusa Along bear valley rd. 2.5 Mi from jct with state route 20. Oak woodland. 366 Comment
  RSA74314  Lycopus americanus Milo S. Baker 1946-9-5 11628 Colusa Along Hwy in water ditch betw Colusa & Williams. Comment
  UCD124975  Lycopus americanus Collector Unknown Date Unknown s.n. Colusa Exact location unknown. 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
  SBBG119884  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  RSA0014831  Lythrum californicum Roxana Stinchfield 1916-7-11 433 Colusa Davis Tule, near Sycamore Slough. 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
  RSA0015862  Lythrum hyssopifolia L. Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC107979  Lythrum tribracteatum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1884 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  JEPS104406  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  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
  UC1619949  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 365 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
  CHSC79466  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1106 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 216 Comment
  CHSC86127  Madia gracilis Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 121 Comment
  CAS-BOT-BC334716  Madia gracilis Bruce G. Baldwin 1985-6-1 483 Colusa 3.2 miles norht of junction with California State Highway 20 along Bear Valley Road Comment
  UCD135665  Madia gracilis Bruce G. Baldwin 1985-6-1 483 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  CDA8257  Madia hallii Vernon H. Oswald & Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 miles west of Bear Valley Road, 0.1 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  UCD163226  Madia sativa Craig D. Thomsen 2000-5-30 2260 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66442  Madia sativa Craig D. Thomsen 2000-4-28 2191 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC110854  Malacothamnus fremontii David Isle; Rhonda Isle 2013-6-23 2044 Colusa Just E of Maxwell Grade Summit and pass; hot-burned S aspect slope N of Sites Lodoga Road (at Grapevine Pass). In July 2012 Sites Fire Area. 562 Comment
  UCD81897  Malacothamnus fremontii G. Harrington 2009-6-30 82 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. W side of Bear Creek on flat area above a steep bluff overlooking the creek. 233 Comment
  CHSC80037  Malacothamnus helleri L. P. Janeway; Joyce Lacey-Rickert 2000-6-1 6778 Colusa Vicinity of Grapevine Creek, Hayes Canyon, and Eggman Canyon. 335 Comment
  CAS-BOT-BC347385  Malacothrix floccifera Alice Eastwood; John Thomas Howell 1938-5-16 5635 Colusa Lake-Colusa Co. line on road to Williams Comment
  CHSC110848  Malacothrix floccifera David Isle; Rhonda Isle 2013-5-19 2042 Colusa Little Stony Creek Watershed. 0.1 mi W of Maxwell Grade Summit; Burned NW asp. S of Sites Lodoga Road. Alluvial terrace of eph. drainage; 7/12 Sites Fire Area GPS 10S 0546355E 4355688N. 548 Comment
  CHSC27868  Malacothrix floccifera Robin Ondricek 1978-4-8 5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC48167  Malacothrix floccifera Thomas W. Nelson, Jane P. Nelson 1978-4-29 3931 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS120980  Malacothrix floccifera Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18627 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
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UC1613354  Malacothrix floccifera Charles M. Belshaw 1937-4-1 2854 Colusa Vicinity of Cook's Spring Inner North Coast Range, Devil's Ridge Comment
  UCR261603  Malacothrix floccifera Ann Howald 2003-3-26 2295 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  CHSC84435  Malvella leprosa Lowell Ahart 2003-8-15 10507 Colusa Road (disked) that bordered rice field, on the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  CHSC116053  Marah fabacea Richard R. Halse 2014-3-25 9029 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  POM284892  Marah fabacea Lyman Benson 1935-3-27 6337 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  RSA0010481  Marah watsonii Richard R. Halse 2014-3-25 9031 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UC903736  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa less than 1 mi e Colusa-Lake Co. boundary (along Hiway 20) Comment
  UCD164045  Marah watsonii Richard Philbrook 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. Lower slopes of hill. 327 Comment
  UCD66594  Marah watsonii Craig D. Thomsen 2000-4-28 2241 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66689  Marah watsonii Craig D. Thomsen 2000-5-11 2319 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
  UCD66701  Marah watsonii Craig D. Thomsen 2001-4-12 2432 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
  RSA63685  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa 1 mile E of Lake - Colusa boundary along hwy 20, Serpentine area. Comment
  UCD57553  Marrubium vulgare Andrew Pedersen; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC75895  Matricaria occidentalis Miss M. Alice King 1905-1 Colusa near City College; Sacramento Valley Comment
  UCR212379  Medicago minima Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  UCD56908  Medicago polymorpha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3511 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD81219  Medicago polymorpha Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5556 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  POM276582  Medicago polymorpha Lyman D. Benson 1933-4-16 4337 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  CDA14215  Melica californica G. F. Hrusa 1993-5-2 10859 Colusa Frenzel Creek Research Natural Area; Mendocino National Forest. Small colony of several clumps on lower NW facing slopes in mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Scattered among openings in sparse Quercus durata chaparral. Perennial. 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
  UCR119121  Melica californica Beecher Crampton 1958-4-21 4730 Colusa Inner North Coast Ranges, 7.8 miles northwest of Rumsey, along Highway 16, just above junction of Bear Creek with Cache Creek. 381 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
  SEINET11684249  Melica californica Unknown 1971-1 908 Colusa 3.3 mi N of Stony Ford on Elk Creek Road Comment
  JEPS80810  Melica harfordii L. R. Heckard and J. C. Hickman 1981-7-31 5783 Colusa Fouts Springs Overlook Snow Mt. (e side of Snow Mt.) 1813 Comment
  RSA724950  Melilotus indicus L. Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CDA16093  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa North Coast Ranges; Little Stony Creek 457 Comment
  UCD107985  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa Little Stony Creek. 457 Comment
  JEPS108913  Mentha canadensis Lowell Ahart 2006-8-9 13090 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  POM62477  Mentha canadensis Roxana Stinchfield 1918-7-8 382 Colusa Sycamore Slough; Stinchfield Ranch Comment
  CHSC94314  Mentzelia laevicaulis Lowell Ahart 2006-8-9 13109 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  UCD38806  Mentzelia micrantha Beecher Crampton 1958-5-19 4821 Colusa Colusa County, 6.3 miles northeast of Ladoga. Comment
  UCR261642  Micropus californicus Ann Howald 2003-4-23 2310 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  SEINET5710220  Micropus californicus Patricia Warne 1967-1 56 Colusa South end of Bear Valley by Bear Creek.; Bear Valley 390 Comment
  CAS-BOT-BC348362  Micropus californicus var. californicus Roxana S. Ferris 1917-4-14 573 Colusa Foothills 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC348363  Micropus californicus var. californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit of grade on Williams - Stonyford Rd Comment
  CHSC62919  Micropus californicus var. californicus Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 B Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 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
  JEPS87666  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
  UC71639  Microseris campestris Miss Alice King 1905-1 Colusa College City Comment
  JEPS124230  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 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
  JEPS35674  Microseris douglasii subsp. douglasii W. L. Jepson 1932-5-8 16270 Colusa Ladoga Ladoga (w Colusa County) 457 Comment
  JEPS36201  Microseris douglasii subsp. douglasii W. L. Jepson 1920-5-23 8970 Colusa Bear Valley 426 Comment
  UCR261654  Microseris paludosa Ann Howald 2003-4-24 2322 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, near Pinto Point camping area 368 Comment
  CHSC89880  Microseris sylvatica B. Castro; L. Janeway 2001-5-10 1249 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, at the blue oak-grassland edge on moderately steep E-facing slope 405 Comment
  UC638687  Microseris sylvatica Ethel Crum 1938-5-8 2032 Colusa 3 mi n Leesville Comment
  CHSC86524  Microsteris gracilis B. Castro; Beth Hendrickson 2003-3-19 1391 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  UCD64433  Microsteris gracilis Craig D. Thomsen 2001-3-27 2436 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
  RSA424702B  Microsteris gracilis subsp. gracilis Aaron Liston, M. A. Blumler 1987-4-26 667 -14 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  CHSC108158  Mimetanthe pilosa David Isle; Rhonda Isle 2010-7-21 1915 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. West shoreline of East Park Reservoir on bank just north of spillway; Within 2 to 4 ft of water line. 365 Comment
  RSA724949  Mimulus cardinalis L. Ahart 2006-8-9 13157 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 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
  UCD122620  Mimulus douglasii Kim E. Steiner 1978-3-30 175 Colusa Bartlett Springs Road, ca. 15.9 miles from State Highway 20 via Bear Valley Road. Comment
  JEPS80380  Mimulus floribundus L. R. Heckard and J. Hickman 1981-6-22 5613 Colusa Dark Hollow Creek Snow Mt. 1889 Comment
  HSC85824  Mimulus guttatus David Munger, Tallchief Comet, Jeff Dunk 1987-4-12 78 Colusa Bear Valley Comment
  SBBG128807  Mimulus guttatus L. Ahart 2013-5-1 18688 Colusa small drainage, N of the wash and St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  JEPS108815  Mimulus 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
  JEPS60202  Mimulus layneae L. R. Heckard 1969-5-29 2238 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
  UC971992  Mimulus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  JEPS3633  Mimulus microphyllus H. L. Mason 1953-5-5 14518 Colusa 1/4 mi above confluence of Little Stony Creek and Trout Creek; Little Stony Creek drainage 670 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
  UCD82576  Mimulus nudatus Craig Thomsen 2008-6-12 2766 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  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
  JEPS108933  Mimulus pilosus Lowell Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA0118631  Mimulus pilosus Lowell A. Ahart 2013-10-1 19072 Colusa Strand of East Park Reservoir, about 2.5 miles (air) southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 365 Comment
  UCR261755  Mimulus pilosus Ann Howald 2003-5-30 2358 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  NY90769  Mimulus rattanii V. Rattan 06 1882 s.n. Colusa Above Font's Spr. Coast Mts. North of San Francisco Bay. Comment
  CHSC86967  Minuartia douglasii B. Castro 2003-5-15 1436 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Above dirt rd paralleling a S-trending canyon. 179 Comment
  UCD164031  Minuartia douglasii Indya Messier 2016-4-9 5 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. South of the corral at junction of 16 and 20, at the top of hill. 504 Comment
  CHSC92630  Minuartia nuttallii var. gregaria D. Isle 1999-7-14 1287 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Approx. 1/3 mile below jct. 16N18/16N03 (1/4 mi. below Lake/Colusa Co. Line in Colusa Co. GPS: 10S 0522970 E 4347039 N; Spr 25' South. 1688 Comment
  JEPS89251  Moluccella laevis Frank A. Leach 1919-1-1 Colusa w of Williams (Elbert Brim ranch) Comment
  CAS-BOT-BC220676  Monardella villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CHSC83196  Monardella villosa D. Sanchez-Mata 1996-6-27 Colusa Williams. Blue Ridge. In Bear Creek. Comment
  UCR44933  Monardella villosa 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-BC214163  Monardella villosa subsp. villosa Mark A. Elvin; David Isle; Mark S. Brunell 2006-8-3 4991 Colusa Mendocino Nat. Forest, E face of Snow Mtn., Stony Creek along M10, Southern Northern Inner Coast Ranges 609 Comment
  UCD82537  Monardella villosa subsp. villosa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5690 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
  JEPS15267  Monolopia major Rimo Bacigalupi with G. L. Stebbins, Calvin McMillan, Peter Kamb, and S. Galen Smith 1950-4-16 3118 Colusa base grade (Bartlett Springs road) (western edge of valley); inner edge of easternmost North Coast Ranges, Bear Valley 426 Comment
  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
  UCD81240  Monolopia major Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5404 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Slopes on the north side of the canyon that is located just south of Brophy Canyon. 262 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
  UCD82631  Muhlenbergia asperifolia Jack Alderson 2009-8-6 27 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near confluence of Craig and Bear Creeks. 304 Comment
  UCD86698  Muhlenbergia filiformis G. Thomas Robbins; L. R. Heckard 1956-7-25 3707 Colusa South of Snow Mt. East and skirting the eastern base of the 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-BC83272  Myosurus minimus Roxana S. Ferris 1918-4-10 1442 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83276  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  UCD96586  Myosurus minimus H. L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  UC1028302  Myosurus sessilis George B. Rossbach 1955-4-9 271 Colusa 3 mi e Maxwell (Sacramento Valley); Sacramento Valley 18 Comment
  POM312445  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa 3 miles east of Maxwell Comment
  UCD96289  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  UC1100003  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-7-18 1007 Colusa 2.5 mi w of Williams Comment
  POM312984  Najas guadalupensis H. L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 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
  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
  UCD72481  Nassella lepida Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3815 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 beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  CHSC100258  Nassella pulchra D. Isle 1988-4-13 1506 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
  CHSC85970  Nassella pulchra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UCD57863  Nassella pulchra Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 48 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
  UCD66983  Navarretia atractyloides Ellen Dean; Davis Botanical Society 2008-5-31 5057 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  UC856855  Navarretia cotulifolia A. A. Heller 1916-6-9 12388 Colusa about 2 mi w Leesville; Coast Range Comment
  UC908409  Navarretia cotulifolia Herbert L. Mason 1946-5-30 12817 Colusa near Eppersons; Bear Valley Comment
  CHSC72457  Navarretia divaricata subsp. vividior L. P. Janeway; David Isle 1998-7-3 5711 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
  JEPS80184  Navarretia divaricata subsp. vividior L. R. Heckard with J. Hickman 1980-7-3 5336 Colusa ca 10 mi w Stonyford (just w of Summit Springs, Colusa-Lake County boundary); Snow Mt. 1548 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
  CHSC112919  Navarretia heterandra B. Castro; Robin Carter, Amy Lyons 2010-5-13 1806 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in distrubed, grazed annual grassland. 119 Comment
  CHSC79543  Navarretia heterandra B. Castro; L. P. Janeway 2000-5-1 1104 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  JEPS117020  Navarretia heterandra David Gowen 2008-5-24 924 Colusa West of Sites, heading up the hill on road to Ladoga, opposite driveway to #4826. Comment
  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
  JEPS81285  Navarretia intertexta L. R. Heckard and J. C. Hickman 1982-7-5 5896 Colusa Summit Springs, south side of Snow Mt. 457 Comment
  UC908621  Navarretia jepsonii Herbert L. Mason 1946-5-30 12814 Colusa about 1 mi e Lake County line (w Colusa County); Leesville Grade Comment
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD66870  Navarretia jepsonii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5073 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. Just south of junction with trail that heads east to the headwaters of Thompson Creek. 634 Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  CAS-BOT-BC230339  Navarretia leucocephala subsp. bakeri Niall McCarten 1985-5-6 5111 Colusa S side of Standard road, 0.2 mile W of Mills Orchards Road NW of Williams Comment
  CHSC107942  Navarretia leucocephala subsp. leucocephala B. Castro; L. Janeway 2011-4-27 1866 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  UCD72392  Navarretia mellita Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5118 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UCR225393  Navarretia nigelliformis Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5082 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa counties. South of junction with trail that heads down to the headwaters of Thompson Creek 429 Comment
  CHSC89835  Navarretia nigelliformis subsp. nigelliformis B. Castro; L. Janeway 2001-5-10 1250 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek. 381 Comment
  UCD57871  Navarretia nigelliformis subsp. nigelliformis Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 51 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
  JEPS70419  Navarretia pubescens W. L. Jepson 1932-5-7 16256 Colusa 1 mi above Venado 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
  UCD81730  Nemacladus capillaris Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5732 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
  UCR78370  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa road to Goat Mtn Lookout, 2.2 mi. south of Route M-10 (Bear Creek - Fouts Spring Road) at head of S Fork of Stony Creek, c. 12 air mi. WSW of Stonyford 1500 Comment
  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
  UCD160063  Nemophila James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  CHSC62937  Nemophila heterophylla Vernon H. Oswald; Lowell Ahart 1994-4-6 6058 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. Growing in gravelly soil of a roadside bank. 463 Comment
  JEPS95489  Nemophila heterophylla Vernon H. Oswald and L. Ahart 1994-4-6 6058 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  RSA758531  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-3-11 14372 Colusa along CA-20, 14.3 miles southwest of Williams 375 Comment
  UC595049  Nemophila heterophylla Annetta Carter 1938-5-8 1384 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  CHSC14017  Nemophila menziesii G. Notch 1974-3-30 122 Colusa Locally scattered along roadside ca. 0.5 mi w of jct of Hwys 20 and 16 on Hwy 20. 335 Comment
  JEPS81302  Nemophila parviflora L. R. Heckard and J. C. Hickman 1982-7-5 5916 Colusa grassy slope below Summit Springs (s side Snow Mt.); , below Summit Springs 1524 Comment
  CHSC79764  Nemophila pedunculata L. P. Janeway; B. Castro 2000-5-4 6707 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  CHSC86958  Nemophila pedunculata Beth Hendrickson; Jenny Marr 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 158 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
  UCD119932  Nemophila pedunculata J. M. Tucker; Ted Niehaus 1960-4-3 3584 Colusa 9.1 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  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
  RSA0118880  Nicotiana acuminata var. multiflora Lowell Ahart 2013-10-1 19084 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CAS-BOT-BC231532  Nicotiana glauca J. H. Thomas 1960-8-29 8846 Colusa About 11 miles SW of Williams along highway 20 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
  SEINET11587905  Nicotiana glauca Unknown 2009-3-11 14379 Colusa Williams Comment
  SEINET6174905  Nicotiana glauca R. R. Halse 2007-3-25 7123 Colusa Along State Hwy. 20 ca 7.8 miles NE of junction with State Hwy. 16 at base of Salt Canyon, 100 Comment
  CHSC113037  Nicotiana quadrivalvis Lowell Ahart 2013-10-1 19085 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS120795  Nicotiana quadrivalvis Lowell Ahart 2013-10-1 19085 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
  UC199530  Nicotiana quadrivalvis H. M. Hall 1917-4-29 10286 Colusa 5 mi n Colusa (Sacramento River banks); Sacramento River Comment
  CAS-BOT-BC227679  Oemleria cerasiformis Craig Thomsen 2008-6-12 2762 Colusa Walker Ridge, vicinity of Elgin Mine. Lucientes Property 655 Comment
  SEINET5766934  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton Comment
  JEPS81407  Orobanche pinorum L. R. Heckard and J. C. Hickman 1982-7-9 6014 Colusa Colusa-Lake County Boundary: Near junction of Horse Glade along road to Lookout, Goat Mt. Comment
  UC71779  Orobanche vallicola H. P. Chandler 1905-10-1 Colusa Princeton Comment
  SEINET10549700  Orthocarpus lithospermoides var. bicolor Mary Susan Taylor, E. Pierce 1981-5-17 Taylor 3757 Colusa On E side of Lodoga-Stonyford Rd, in wet meadow of Valley Grassland, ca. 1 mi S of Stonyford. 1100 ft. 335 Comment
  SEINET12319550  Orthocarpus purpurascens Unknown 1980-1 19 Colusa ca 0.3 mi W of jct of Hwy 20 & 16, S side of Bear Cr., ca 18 mi SW of Williams 322 Comment
  RSA430221  Orthocarpus purpurascens var. purpurascens Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC72422  Osmorhiza chilensis L. P. Janeway; David Isle 1998-7-3 5710 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
  UCD70305  Packera breweri D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  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
  CHSC88577  Packera clevelandii L. P. Janeway 2001-6-6 7112 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  UC1299450  Packera clevelandii Freed W. Hoffman 1947-6-19 1672 Colusa Cooks Springs North Coast Ranges Comment
  UCD134746  Packera clevelandii A. M. Shapiro 1994-6-12 s.n. Colusa along Goat Mountain Road, between Sullivan Creek and Summit Lookout. Comment
  UCD64040  Packera clevelandii Craig D. Thomsen 2000-6-23 2425 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
  JEPS118687  Packera eurycephala var. eurycephala David Isle 2011-5-8 1902 Colusa E of Isle home, concen. W of E fenceline. 2253 Dennis Dr, Stonyford in W 5 Ac of S 1/2 of NW 1/4 of SW 1/4 of SE 1/4. Gilmore Peak 7.5' quad. Comment
  JEPS74815  Packera eurycephala var. eurycephala L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4024 Colusa sw of Leesville (just sw of site of old Kowalski ranch( below upper dam road)); Upper Indian Valley 396 Comment
  UC91676  Packera eurycephala var. eurycephala Brandegee May 1887 Colusa Epperson's Comment
  CHSC106247  Packera greenei B. Castro; L. P. Janeway 2001-6-3 1258 C 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. 883 Comment
  UC1543129  Packera greenei Donald G. Nelson 1940-6-9 Colusa w of Stoneyford Road to Snow Mountain area (road to Bonnie View) Comment
  UCD159330  Packera greenei D. S. Park 2010-6-5 114 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD66559  Packera greenei Craig D. Thomsen 2001-5-24 2438 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
  HSC46738  Packera greenei William J. Ferlatte 1978-6-13 1908 Colusa Colusa-Lake Co. line. On Mendocino National Forest Rd. 16N06 about 0.5 mi. SE of Kanaka Glade 1050 Comment
  UC1299386  Paeonia brownii Freed W. Hoffman 1948-6-27 2493 Colusa 8.6 mi sw Fouts Springs (w Colusa Co.); upper Letts Valley 1310 Comment
  CHSC94428  Panicum capillare Lowell Ahart 2006-8-22 13222 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  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
  CAS-BOT-BC413468  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Sycamore Slough. Stinchfield ranch Comment
  CDA11258  Parnassia californica G. F. Hrusa 1994-11-7 11993 Colusa North Coast Biodiversity Arena; Banks of Little Stony Creek, approx. 2.5 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  UCR115039  Parnassia californica G. Fred Hrusa 1994-11-7 11993 Colusa Banks of Little Stony Creek, c. 2.5 mi above Stonyford-Lodoga Rd. on Goat Mtn Road. 440 Comment
  UC596227  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  UC766200  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  UCD56679  Pedicularis densiflora Jack Alderson 2007-3-25 15 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. 574 Comment
  UCD66581  Pediomelum californicum Craig D. Thomsen 2001-5-24 2526 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD80837  Pellaea andromedifolia Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5294 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Ridge between Brophy Canyon and the canyon to its north. Highest point just above northern canyon at its terminus in a stock pond. 512 Comment
  JEPS86609  Pellaea brachyptera L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6713 Colusa 0.5 mi. n.e. Summit Springs (s.w. flank of Snow Mt.); Colusa-Lake Co. Line, Snow Mt. 1650 Comment
  CHSC46033  Pellaea mucronata Lowell Ahart 1976-11-14 1004 Colusa On the north side of the Sites Lodoga Road, about 3 miles north-west of Sites. 365 Comment
  UCD83617  Pellaea mucronata var. mucronata Craig Thomsen; G. Harrington 2009-5-12 2833 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
  HSC47602  Penstemon azureus J. P. Smith, J. O. Sawyer 1978-4-29 9797 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UCD57661  Penstemon heterophyllus Madeline Christopher; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. 335 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
  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
  JEPS15552  Penstemon purpusii G. Thomas Robbins with L. R. Heckard 1956-7-25 3709 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, along trail due s of Snow Mt. East, at lower edge of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. East, Dark Hollow Crk trib. Middle Fork Stony Creek 1981 Comment
  CHSC42649  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near Letts Lake and Lily Pond. 1188 Comment
  CHSC86882  Perideridia kelloggii B. Castro 2003-4-10 1419 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. 121 Comment
  UCD127855  Perideridia kelloggii K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, on U.S. #20. Comment
  UCR261734  Perideridia kelloggii Ann Howald 2003-5-30 2357 A 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
  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
  UCD99460  Persicaria lapathifolia H. R. Drever 1945-8-24 s.n. Colusa Near Grimes. Comment
  CHSC80251  Persicaria punctata B. Castro; G. Kuenster 2000-7-19 1201 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal. 39 Comment
  JEPS2272  Phacelia ciliata var. ciliata Ruth Johnson 1915-4-6 Colusa College City 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
  CHSC32769  Phacelia corymbosa James Jokerst 1980-6-27 923 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  JEPS73516  Phacelia corymbosa L. R. Heckard 1972-7-10 3134 Colusa w Trout Creek; Snow Mt. 1828 Comment
  UCR44932  Phacelia corymbosa 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
  RSA0021579  Phacelia distans M. Bourell 1997-3-29 5807 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground. Comment
  RSA794842  Phacelia distans D. Isle 2008-4-9 1934 Colusa Reese Place Duck Club (4498 2 Mile Road); approx. 4 miles northeast of Maxwell. 30 Comment
  JEPS2352  Phacelia divaricata W. I. Follette 1935-3-31 25 Colusa Tahoe-Ukiah hwy 19.3 mi sw Williams (2.3 mi e of the Colusa-Lake Co. line. on or near Bear Creek, 3 1/2 mi se of Wilbur Spr.) Comment
  UCD63016  Phacelia divaricata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. 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
  POM287455  Phacelia divaricata Lyman Benson 1933-4-16 4326 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  CHSC12748  Phacelia egena L. V. Ritter 1969-4-30 227 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. Comment
  CHSC77938  Phacelia egena Beth Hendrickson; B. Castro, L. P. Janeway, Mary Ann Griggs 1999-4-12 Colusa Vicinity of Logan Ridge and Golden Gate. 158 Comment
  UC901824  Phacelia egena L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3320 Colusa road cut 1 mi se Sites; Stone Corral Creek 76 Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CDA32829  Phacelia imbricata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  RSA799179  Phacelia imbricata subsp. imbricata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17132 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 93 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
  HSC62807  Phacelia tanacetifolia J. M. DiTomaso 1979-4-14 875 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  UC765521  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  UCR233441  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17129 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCR225399  Phalaris aquatica Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5100 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon, just south of junction with trail that leads east to Brophy Canyon and Thompson Creek 488 Comment
  UCD88339  Phalaris brachystachys Beecher Crampton 1961-7-20 5936 Colusa 8 miles SE of Grimes. Comment
  UCD89177  Phalaris minor Hursh 1919-1 X 3340 Colusa Williams. Comment
  UCD67056  Phalaris paradoxa Craig D. Thomsen 2008-5-23 2750 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. 420 Comment
  CHSC57170  Phlox gracilis R. W. McNulty 1983-4-9 1 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi se of Williams. 321 Comment
  SEINET7096814  Phlox gracilis A. G. Vestal 1985-4-5 s.n. Colusa Along Route 16 about .2 mile south of Route 20 and near Bear Creek. NAD27, 39? deg. 00'36ao , -122?_ 21'22ao (converted to WGS84 decimal degrees). Comment
  UCR206397  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14370 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCD83810  Phoradendron bolleanum Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5957 Colusa Walker Ridge, along Walker Ridge Road, at intersection with road/trail to Mount Baldy. 880 Comment
  RSA0115434  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian. 20 Comment
  UCR257578  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley, along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian 20 Comment
  CAS-BOT-BC141237  Phoradendron serotinum subsp. tomentosum Roxana S. Ferris 1926-4-21 3274 Colusa Sycamore Slough 2 miles W of Sycamore Comment
  CHSC88597  Phragmites australis L. P. Janeway; B. Castro 2001-6-3 7098 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. 884 Comment
  JEPS106503  Phragmites australis L. P. Janeway, B. Castro 2001-6-3 7098 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain 884 Comment
  UCD125937  Phyla nodiflora Collector Unknown Date Unknown s.n. Colusa Exact location unknown. Comment
  UCD126760  Physalis lancifolia P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  UCD81734  Pickeringia montana Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5736 Colusa Walker Ridge. Along Walker Ridge Road, just S of turn off to Indian Valley Reservoir. 840 Comment
  CHSC105195  Pickeringia montana var. montana B. Castro; L. P. Janeway 1999-7-5 1017 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along N edge of USFS Rd 16N06, near top of Pacific Ridge. 1127 Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  CAS-BOT-BC242677  Piptatherum miliaceum Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  UCD72389  Piptatherum miliaceum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5115 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UCD84557  Piptatherum miliaceum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CAS-BOT-BC169840  Plagiobothrys Alice M. King 1905-1-1 s.n. Colusa near College City. Sacramento Valley Comment
  CHSC81227  Plagiobothrys bracteatus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  CHSC77920  Plagiobothrys canescens Beth Hendrickson; Jean Witzman 1999-4-21 Colusa Vicinity of Antelope Valley and Sites. 137 Comment
  UC71656  Plagiobothrys canescens Miss Alice King 1905-4-7 Colusa College City Comment
  UCD120813  Plagiobothrys canescens Alpaslun Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Comment
  CHSC71109  Plagiobothrys fulvus Jan Monelo 1989-4-1 14 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
  UCD56945  Plagiobothrys fulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3547 Colusa BLM Payne Ranch. On west side of Hwy. 16. 2 road miles south of intersection with Hwy. 20. 312 Comment
  UC78083  Plagiobothrys fulvus var. campestris Katharine Brandegee April, 1889 Colusa Colusa Junction Comment
  CHSC29722  Plagiobothrys humistratus K. R. Stern 1980-4-1 6621 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD120840  Plagiobothrys humistratus Robert E. Preston 1995-6-2 868 Colusa Bear Valley Road. Comment
  CHSC31259  Plagiobothrys leptocladus R. A. Schlising; K. R. Stern 1980-5-5 3580 Colusa Southwest of Colusa, at Colusa National Wildlife Refuge; southwest cornerof refuge, north of Ware Road, in dried flats. Comment
  UCD56901  Plagiobothrys nothofulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3504 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  HSC99265  Plagiobothrys nothofulvus D. R. Junell 1965-4-18 20 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  UCD120895  Plagiobothrys nothofulvus David V. Glover 1960-4-14 50 Colusa Cache Creek, State Highway 16, 10 miles north of Rumsey. Comment
  JEPS124210  Plagiobothrys stipitatus Lowell Ahart 2015-4-10 20006 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  RSA10708  Plagiobothrys stipitatus C. B. Wolf 1928-5-8 2123 Colusa Sacramento Valley. 3 mi. S of Arbuckle Comment
  CHSC107976  Plagiobothrys stipitatus var. micranthus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1857 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  HSC48203  Plagiobothrys stipitatus var. micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3953 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  OBI6032  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2123 Colusa Sacramento Valley, 3 mi S of Arbuckle 43 Comment
  POM63664  Plagiobothrys stipitatus var. micranthus Roxana S. Ferris 1917-4-12 534 Colusa 4 miles east of Williams. Comment
  UCD64508  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 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD64512  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2097 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
  UCD66869  Plagiobothrys stipitatus var. micranthus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5072 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
  CHSC55678  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-3 6623 Colusa North central portion of Delevan National Wildlife Refuge. 45 Comment
  HSC31306  Plagiobothrys tenellus Carter Schleicher 1974-5-4 23 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  CHSC94420  Plantago coronopus Lowell Ahart 2006-8-9 13154 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD58124  Plantago coronopus Ellen Dean; PLB 102 Class 2007-4-29 3720 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Near 'Roadkill Cafe. 414 Comment
  SEINET8665579  Plantago elongata R. R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  UCD18845  Plantago elongata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 153 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC81283  Plantago erecta J. Trizzino 2001-3-31 18 Colusa Bear Valley Meadow along east side of Bear Balley Road. 396 Comment
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. Comment
  UCSC009426  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams 445 Comment
  SD147976  Plantago erecta L. Coats 1983-4-24 6 Colusa In the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road. 487 Comment
  UCD138960  Platanthera dilatata var. leucostachys Neil Miller 1973-6-3 96 Colusa area south of Snow Mountain, around 7 miles west of Stonyford. Northwestern part of county. 1219 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
  CHSC60119  Platystemon californicus Bryan Case 1988-4-9 128 Colusa Ca 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca 18 mi sw of Williams. 321 Comment
  HSC83345  Platystemon californicus Robin Brooks 1975-4-20 31 Colusa Bear Valley Rd., 8.7 mi. N of State Hwy. 20 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
  UCD96073  Platystemon californicus Clinton C. Shock 1980-5-3 61 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  CDA34082  Platystemon californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC86821  Platystemon californicus Dana J. Lenarz 1982-3-27 3 Colusa .5 km W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 29 km SW of Williams 322 Comment
  SEINET12091628  Platystemon californicus C. L. Eddy 1984-1 5 Colusa Ca 0.3 mi W of jct of Hwys 20 and 16, S side of Bear Creek, ca 16 m SW of Williams. Wilbur Springs 322 Comment
  SEINET8794142  Platystemon californicus K. Brandegee 1889-1 s.n. Colusa Colusa Junction [now Cortena]. Comment
  UCD13217  Platystemon californicus Steve Daniel 1986-4-13 10 Colusa California. Colusa Co. Bear Valley, 7.6 mi No of jct of Bear Valley Rd. and hwy 20. Elev. ca. 1300 ft. 396 Comment
  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
  RSA388341  Platystemon californicus var. californicus Linda Bell 1975-4-19 40 Colusa Bear Valley Road, 1 mile north of State Highway 20 Comment
  CDA11417  Plectritis ciliosa G. F. Hrusa, K. van Katwyk 1995-4-22 12138 Colusa Inner North Coast Ranges; On S side of Leesville Rd. approx. 3 m. N of Hwy 20. 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
  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
  UCD137585  Plectritis ciliosa Gene R. Williams 1961-3-25 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Highway 20. Comment
  UC1018913  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 a Colusa Colusa County Comment
  UC999837  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 711 Colusa Colusa County Comment
  HSC65997  Plectritis congesta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 45 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  CDA32826  Plectritis congesta subsp. brachystemon P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC86875  Plectritis macrocera B. Castro 2003-4-1 1410 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On cutbank of dirt road which contours along hillside. 185 Comment
  JEPS16087  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  UC999820  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 698 Colusa near Williams Comment
  UCD57103  Plectritis macrocera Gordon Harrington; Diana Hickson 2007-4-7 0016 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  CAS-BOT-BC254889  Poa bulbosa M. H. Handley 1963-5-1 s.n. Colusa NW of Maxwell 79 Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  CHSC100244  Poa bulbosa D. Isle 1988-4-13 1509 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
  UCD160062  Poa bulbosa James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  UCD56898  Poa bulbosa Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3501 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
  SEINET11686444  Poa bulbosa var. vivipara S. M. Leary 1978-1 3 Colusa N side of Salt Creek, S side of Hwy 20, 11 mi WSW of Williams 143 Comment
  UCD82444  Poa howellii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5661 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  JEPS120977  Poa secunda Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18643 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  CHSC77408  Poa secunda subsp. secunda Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  UC883695  Pogogyne douglasii A. A. Heller 1916-6-9 12387 Colusa Coast Range about 2 miles west of Leesville Comment
  UCD66945  Polanisia dodecandra subsp. trachysperma Ellen Dean; Davis Botanical Society 2008-5-31 4991 Colusa Along Sites - Lodega Road, west of I-5 at Maxwell. 110 Comment
  UCR281725  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern California Foothills, north side of Maxwell Road, c. 2 miles west of Sites and 5.8 miles east of summit of Maxwell Grade [Sites-Lodoga Road] 149 Comment
  CHSC85960  Polygonum aviculare Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CAS-BOT-BC413965  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-6-17 292 Colusa Near College City Comment
  CHSC107308  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. Large +- alkaline vernal pool/marsh. 49 Comment
  RSA725023  Polypogon maritimus L. Ahart 2006-8-9 13171 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC107982  Polypogon monspeliensis B. Castro; L. Janeway 2011-4-27 1865 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  CHSC77637  Polypogon monspeliensis Heidi West; Caroline Warren, Julie Cunningham, Jenny Marr 1998-5-27 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 121 Comment
  JEPS75436  Polypogon monspeliensis W. L. Jepson 1934-5-3 16602 Colusa n Colusa (Stegeman Sta.) Comment
  RSA725017  Polypogon monspeliensis L. Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS127192  Polystichum imbricans subsp. curtum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20721 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
  JEPS80814  Polystichum imbricans subsp. imbricans L. R. Heckard and J. C. Hickman 1981-7-31 5787 Colusa e side Snow Mt. (Fouts Springs Overlook) 1783 Comment
  CAS-BOT-BC102381  Populus fremontii Roxana S. Ferris 1917-4-17 624 Colusa Sycamore, Sycamore Slough Comment
  RSA724221  Populus fremontii Richard R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  RSA724229  Populus fremontii Richard R. Halse 1988-2-14 3537 Colusa Along State Hwy 20 where it crosses over Salt Creek at the eastern end of Salt Canyon, 7.9 miles N of its junction with State Hwy 16. 100 Comment
  HSC86897  Populus fremontii subsp. fremontii Anthony J. Desch, Bryon Cariss 1988-4-17 36 Colusa Goat Mountain Rd. 7 mi. W from its junction with Stonyford Rd. Comment
  CHSC96689  Portulaca oleracea Lowell Ahart 2006-8-22 13232 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SEINET3892428  Potamogeton diversifolius 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.; 0 511 Comment
  UCD39221  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E of Cortena. Comment
  RSA666315  Potentilla drummondii Barbara Ertter 1989-7-2 8627 Colusa Long Glade, a V shaped meadow S of Milk Ranch just W of snow Mt West, about 11 airmiles due W of Stonyford. 1957 Comment
  UCD35780  Poterium sanguisorba Beecher Crampton 1962-4-17 6217 Colusa Sycamore. Comment
  UCR19098  Proboscidea louisianica John C. Roos 1948-9-2 4024 Colusa Sacramento Valley, west of Williams 40 Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  UCD122109  Proboscidea louisianica subsp. louisianica Rimo Bacigalupi; L R. Heckard 1951-8-6 3471 Colusa along road between Sites and Lodoga, 4.6 mi. N.W. of Sites. Comment
  JEPS27877  Proboscidea lutea Richard Snow 1958-8-3 671 Colusa on road to Leesville near Highway 20 Comment
  UC1299163  Prunus virginiana var. demissa Freed W. Hoffman 1948-6-27 2523 Colusa 8.5 mi sw of Fauts Springs (western Colusa County); North Coast Ranges Comment
  JEPS110103  Pseudognaphalium luteoalbum Lowell Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD133714  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CAS-BOT-BC361830  Psilocarphus oregonus L. R. Abrams 1928-5-8 12589 Colusa 2 miles south of Arbuckle Comment
  CHSC107977  Psilocarphus oregonus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1856 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. Towards north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in drying vernapool bottom. 49 Comment
  CHSC89836  Psilocarphus oregonus B. Castro; L. Janeway, S. Innecken 2001-5-9 1251 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek. 367 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
  JEPS40463  Psilocarphus tenellus W. L. Jepson 1932-5-7 16267 Colusa Indian Valley Indian Valley (w Colusa County) 518 Comment
  UC1613326  Psilocarphus tenellus Charles M. Belshaw 1937-4-1 2871 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCR198137  Psilocarphus tenellus Ellen Dean, PLB 102 Class 2007-4-29 3721 Colusa BLM Payne Ranch, west of Hwy 16, c. 2 road mi south of junction of Hwy 20 and Hwy 16 through Craig Canyon, near 'Roadkill Cafe' 415 Comment
  CHSC80346  Psilocarphus tenellus var. tenellus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  CHSC86029  Psilocarphus tenellus var. tenellus 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
  JEPS80462  Pteridium aquilinum var. pubescens Alice Q. Howard 1972-7-10 3 Colusa trail from Fouts Camp to Box Springs (n side of ridge separating Trout and Paradise Creeks); Snow Mt 1676 Comment
  CHSC80413  Pterostegia drymarioides Caroline Warren; Jenny Marr 1998-5-4 Colusa Viciniy of Sites and Stone Corral Creek. 91 Comment
  JEPS80430  Purshia tridentata var. tridentata L. R. Heckard 1974-9-9 3840 A Colusa trail up from Summit Springs; Snow Mt. 1859 Comment
  JEPS80463  Pyrola aphylla Alice Q. Howard 1972-7-10 8 B Colusa Crossing trail from Fouts Camp to Box Springs, the highest of the two such areas on the north side of the ridge separating Trout and Paradise Creek. Snow Mountain 1676 Comment
  UCD117828  Pyrola aphylla M. Vincent 1968-6-6 789 Colusa On road to Stony Ford from Goat Mt. 2 4/10 miles west of Old Mills Campground. Comment
  JEPS75762  Quercus L. R. Heckard, and R. Bacigalupi 1976-9-6 4451 Colusa Fouts Camp-Summit Spring trail Snow Mt. 1584 Comment
  UCD84511  Quercus berberidifolia Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6062 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CDA15555  Quercus chrysolepis var. nana G. F. Hrusa 1998-11-7 14906 Colusa North Coast Ranges; above Fouts Springs. Trough Springs Rd. mi. 2.7. Comment
  CAS-BOT-BC86602  Quercus douglasii Roxana Stinchfield 1916-6-18 302 Colusa near College City Comment
  UCD45981  Quercus durata D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. Serpentine chaparral. 850 Comment
  UCD57325  Quercus durata Amy Whitcomb 2007-3-25 1 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. 563 Comment
  JEPS75761  Quercus garryana var. breweri L. R. Heckard, and R. Bacigalupi 1976-9-6 4450 Colusa Fouts Camp-Summit Spring trail Snow Mt. 1615 Comment
  JEPS82547  Quercus garryana var. breweri L. R. Heckard 1983-7-27 6112 Colusa s flank Snow Mt. (slopes around Summit Springs) Comment
  CDA16104  Quercus garryana var. garryana G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15249 Colusa North Coast Ranges; Goat Mtn. 1706 Comment
  CAS-BOT-BC61587  Quercus lobata Roxana S. Ferris 1917-4-17 630 Colusa Sycamore Slough, near Sycamore Comment
  UCD57625  Quercus lobata Michele Lanctot; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. North side of Thompson Creek. 356 Comment
  SD225831  Quercus palmeri Roger Raiche 1990-12-2 Colusa Across Suphur Creek from Wilbur Springs; Comment
  SFV17753  Quercus palmeri R. Raiche 1990-12-2 s. n. Colusa Acoss Sulphur Creek from Wilber Springs. Comment
  UCD14524  Quercus palmeri Roger Raiche 1990-12-2 A Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  CAS-BOT-BC104659  Quercus wislizeni L. Blackford; S. Branch; D. Malm 1988-4-16 63 Colusa 13.8 miles of Hwy. 20 on Walker Ridge Road 975 Comment
  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
  CHSC33068  Rafinesquia californica Thomas Nelson; Jane Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  UC768665  Rafinesquia californica R. F. Hoover 1938-4-24 3211 Colusa Upper Sand Creek Comment
  JEPS80085  Ranunculus alismifolius L. R. Heckard with J. Hickman 1979-6-16 5092 Colusa about 1/2 mi s Milk Ranch (nw of West Peak, Snow Mt.) 2011 Comment
  JEPS81342  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
  UC1049533  Ranunculus canus Rimo Bacigalupi 1950-4-16 3125 Colusa about B.M. 1326 (along road down middle of valley, along creek); Bear Valley, Bear Creek Comment
  UCD163869  Ranunculus canus Craig D. Thomsen 2000-3-31 2078 a 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
  UCR206701  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-17 14391 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 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
  UC72903  Ranunculus hebecarpus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD169733  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  SEINET12091630  Ranunculus hebecarpus C. L. Eddy 1984-1 3 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15 143 Comment
  UCD56912  Ranunculus occidentalis Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3515 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD82500  Ranunculus occidentalis Craig Thomsen; G. Harrington 2009-5-12 2859 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  RSA268199  Ranunculus occidentalis var. eisenii Lyman Benson 1935-3-27 6327 Colusa 3 miles E of Lake County line Inner N coast, Sacramento River, Ukiah-Tahoe 610 Comment
  UCD97058  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins; S. Galen Smith 1950-4-15 1907 Colusa Bear Valley. Comment
  UCD97060  Ranunculus orthorhynchus var. bloomeri Clinton C. Shock 1980-5-3 62 Colusa Bear Valley, ca. 12 miles north west of State Highway 20. 384 Comment
  JEPS81335  Rhamnus californica subsp. californica L. R. Heckard, and J. C. Hickman 1982-7-6 5949 Colusa s side Snow Mt. (West Peak ridge); , West Peak 2103 Comment
  UC71642  Rhamnus ilicifolia Miss Alice King 1905-1 Colusa College City Comment
  UCD57449  Rhamnus ilicifolia Gina Darin; 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. Along trail, north side of Thompson Creek. 373 Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  POM136497  Rhamnus tomentella subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa In Oak grove Phillips Ranch Comment
  CDA21471  Rhododendron occidentale G. F. Hrusa 1989-5-7 6083 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  JEPS95999  Rhododendron occidentale Vernon H. Oswald and L. Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate. Shrub on the rocky bank of Little Stony Creek. 426 Comment
  UCD111678  Rhododendron occidentale Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  HSC63082  Rhus aromatica David Wheeler 1979-4-14 63 Colusa Buck Flat, Walker Ridge, on the way to Barrel Springs. 884 Comment
  UCD15256  Rhus diversiloba R. A. Harris 1974-5-5 051 Colusa Robberts Flat, off of Bartlett Springs road. 487 Comment
  RSA403713  Rhus trilobata var. quinata Michelle Stevens 1979-4-14 30 Colusa Bear Valley Road, 3.9 miles north of State Route 20 412 Comment
  HSC44275  Ribes malvaceum Barbara Kelly 362 Colusa 1 mi.. from intersection of Bartlett Springs Rd. and Grapevine Spring Rd. on Walker Ridge Rd. Comment
  UCD102432  Ribes quercetorum Mr. A. Jones 1934-2-11 s.n. Colusa Above Williams. Comment
  UCD119994  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-12-30 7270 Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property. Top of small canyon. 306 Comment
  UCD97117  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6900 Colusa Along Bear Valley Rd on west and east sides of road. 355 Comment
  UC1051741  Ribes roezlii Helen K. Sharsmith 1953-6-20 4297 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  UCR246379  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest, Dixie Glade Campground 918 Comment
  CAS-BOT-BC173956  Ribes viscosissimum Volney Rattan 1884-6-1 s.n. Colusa Black Butte. Coast Mts. North of San Francisco Bay Comment
  CAS-BOT-BC173957  Ribes viscosissimum Volney Rattan 1884-6-1 s.n. Colusa Black Butte. Coast Mts. North of San Francisco Bay Comment
  CHSC27584  Rigiopappus leptocladus Timothy Spira; Robert Schlising 1978-5-13 3238 Colusa Just E of Lake County line, along Hwy 20. Comment
  UC638693  Rigiopappus leptocladus Ethel Crum 1938-5-7 2012 Colusa 4.2 mi n Rumsey (Comanche Hills, summit of ridge); Inner North Coast Range, summit of ridge, Comanche Hills 254 Comment
  UCD67038  Rigiopappus leptocladus Ellen Dean; Davis Botanical Society 2008-5-31 5018 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 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
  CDA8541  Rigiopappus leptocladus T. C. Fuller 1958-5-27 3668 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS80215  Rorippa nasturtium-aquaticum L. R. Heckard and J. Hickman 1980-7-3 5371 Colusa Summit Springs sw slope Snow Mt., Summit Springs 1554 Comment
  JEPS106501  Rosa californica L. P. Janeway, B. Castro 2001-6-3 7097 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain 884 Comment
  UC1051701  Rosa californica Helen K. Sharsmith 1953-6-21 4309 Colusa near Stoneyford; Inner North Coast Ranges, Big Stoney Creek 518 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
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS113057  Saccharum ravennae Gordon Leppig 2001-9-13 1610 Colusa Rt. 16. Mile marker 4.7-4.58. Bear Creek Gravel bar. Comment
  CHSC79011  Sagina apetala J. Marr; C. Warren, H. West, N. Wight 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine Creek. 121 Comment
  CHSC77928  Sagina decumbens subsp. occidentalis Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 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
  UCD138036  Sagittaria montevidensis subsp. calycina Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa 8 miles north of Colusa. Comment
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CHSC78975  Salicornia subterminalis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9979 Colusa Colusa National Wildlife Refuge. On the west side of Powell Slough 0.25 mi south-southwest of Refuge Headquarters. 15 Comment
  CHSC78976  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge. 15 Comment
  JEPS98320  Salicornia virginica Vernon H. Oswald and Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge 15 Comment
  CAS-BOT-BC102858  Salix breweri C. Hart Merriam 1907-7-23 s.n. Colusa Cook Springs 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
  CHSC70904  Salix breweri Vernon H. Oswald; Lowell Ahart 1998-4-21 8944 Colusa Stonyford-Lodoga Rd. 3.7 mi south of Stonyford. 384 Comment
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS95648  Salix breweri Vernon H. Oswald and L. Ahart 1999-6-22 9786 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. Abundant shrubby willow on the rocky bank of Little Stony Creek. 426 Comment
  UCD162977  Salix breweri Jack Major 1963-5-4 s.n. Colusa In stream, west of Bear Valley on Bartlett Springs Road. (Exact location unknown. Coordinates estimated by label maker.) 518 Comment
  UCD55470  Salix breweri Ellen Dean; Gordon Harrington 2006-10-6 3294 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
  UCD163863  Salix exigua Craig D. Thomsen 2001-5-31 2548 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD56932  Salix exigua Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3534 a Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  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
  CAS-BOT-BC104037  Salix hindsiana Roxana S. Ferris 1917-4-17 619 Colusa Sycamore Slough Comment
  UCD164152  Salix laevigata Craig Thomsen 1999-4-27 2002 Colusa Bear Creek Canyon. About 5 miles north of Hwy 20, 0.25 mile south of Wilbur Bridge. 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
  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
  CDA12801  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Serpentine Flora of California; Little Stony Creek. Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. Comment
  JEPS86636  Salix lasiolepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6686 Colusa sw flank Snow Mt. (n side of West Peak) 2000 Comment
  JEPS95541  Salix lasiolepis Vernon H. Oswald and Lowell Ahart 1994-3-23 6016 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  CHSC112002  Salix lasiolepis David Isle; David Toren 2003-6-24 2128 Colusa NE border of Veratrum spring and mdw, 1/4 mi E of Goat Mtn Rd 16N03 jct w/Horse Glade rd; (with flowing water). 1670 Comment
  CHSC101507  Salsola australis P. Akers 2003-10-7 Colusa North of Maxwell on frontage road east of Hwy 5, west of RR tracks, 1.8 mi north of Delevan Rd. Comment
  CHSC108062  Salsola soda B. Castro; Dave Boegner 2011-9-1 1913 Colusa Sacramento Valley. Larkins Childrens Rancho. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Uncommon along outer western edge of managed +- saline wetland of Gunnersfeld Ranch duck hunting club. 17 Comment
  CHSC27550  Salvia columbariae Scott E. Patton 1978-4-9 7 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 m wsw of Williams. 143 Comment
  HSC45671  Salvia columbariae Stephen Plant 1978-4-22 206 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD80819  Salvia columbariae Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5275 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  CHSC81212  Sanicula bipinnatifida J. Trizzino 2001-3-31 15 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  CAS-BOT-BC223209  Sanicula bipinnatifida Roxana S. Ferris 1926-4-23 6421 Colusa Williams - Stonyford Road Comment
  CDA34108  Sanicula bipinnatifida P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  POM174565  Sanicula bipinnatifida Roxana S. Ferris 1926-4-23 6421 Colusa On grade, Williams- Stonyford Road Comment
  JEPS73498  Sanicula graveolens L. R. Heckard 1972-7-10 3116 Colusa near Trout Creek crossing of trail to Box Springs (Snow Mountain); Snow Mountain 1828 Comment
  UCD82861  Sanicula tuberosa Gordon Harrington 2008-4-13 72 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  SEINET13945258 Image available Sanicula tuberosa J. L. Hobson 1974-1 58 Colusa 0.75 mi. from the junction to Indian Valley on Walker Ridge Rd. Elev. 2800', Wilbur Springs Quad. T14N R6W SEC12 853 Comment
  HSC45685  Scandix pecten-veneris Patricia Shesgreen 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CAS-BOT-BC111366  Schoenoplectus acutus var. occidentalis Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 470 Colusa Davis Tule near Sucamore Slough Comment
  CHSC75646  Schoenoplectus pungens Vernon H. Oswald 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd. 597 Comment
  UCD72538  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3829 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, ca. 0.25 mile downstream of bridge. 251 Comment
  JEPS110449  Scirpus acutus var. occidentalis Lowell Ahart 2006-8-22 13214 Colusa South side of Stony Creek, about 100 yards W of the bridge across Stony Creek, just N of Stonyford. 349 Comment
  UC1100677  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1946-8-7 12987 Colusa eight mi n Colusa (Butte Sink); , n of Colusa Comment
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  UC1100923  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12965 -A Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa 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
  UC769882  Scribneria bolanderi R. F. Hoover 3207 Colusa Upper Sand Creek Comment
  RSA589943  Scrophularia californica Michael A. Vincent, Robert M. Rhode 1996-3-30 7278 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct. Wilbur Springs Rd. Comment
  UC71646  Scrophularia californica Miss Alice King 1905-1 Colusa College City Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b 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
  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
  JEPS80801  Scutellaria californica L. R. Heckard and J. C. Hickman 1981-7-30 5772 Colusa heading up East Ridge of Snow Mountain, West Peak 1950 Comment
  JEPS95817  Scutellaria californica Vernon H. Oswald and L. Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area: T17N R8W Sect. 12, ca. 3200 ft, mixed coniferous forest, serpentine substrate 975 Comment
  UC1562602  Scutellaria californica Barbara Ertter 1989-7-1 8617 Colusa 12 air mi wsw of Stonyford (road to Goat Mountain Lookout, 0.4 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); South Fork Stony Creek 1371 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
  UCD81706  Scutellaria californica Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5714 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
  UCR225654  Scutellaria californica Craig D. Thomsen, Gordon Harrington 2008-7-6 2770 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 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
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  CHSC101618  Scutellaria tuberosa David W. Isle; Teal Richards 2002-4-18 1651 Colusa Mendocino National Forest. N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mountain). SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg. Study Plot. MDB and M. 524 Comment
  UCD163697  Secale cereale Craig Thomsen 1999-5-10 2003 Colusa Bear Valley. About 8 miles north of Hwy 20. 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
  CHSC94415  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC6689  Senecio vulgaris Marilyn Lee 1968-3-30 119 Colusa North side of Hwy. 16 at junction of Hwy. 16 and Hwy. 20. Between Hwy. 16 and Cache Creek. Comment
  SEINET3876301 Image available Sequoia sempervirens James H. Smith 1976-1 s.n. Colusa Williams.; 0 Comment
  UCD92837  Setaria viridis Beecher Crampton 1958-6-26 4974 Colusa along Grieve Road, 5.5 miles south of College City. Comment
  UC71652  Sidalcea diploscypha Miss Alice King 1905-1 Colusa College City Comment
  UC725658  Sidalcea diploscypha A. A. Heller 1942-5-29 16480 Colusa along State Highway #20, 1/2 mi w of the junction with Highway #16 Comment
  UCD23423  Sidalcea diploscypha David Rhode 1977-4-30 22 Colusa Bear Valley, 2.1 miles north of Wilbur Springs. Dry gravel, west facing slope in sparse valley grassland pasture. Comment
  JEPS50051  Sidalcea hartwegii W. L. Jepson 1932-5-8 16278 Colusa Lodoga Lodoga (w Colusa Co.) Comment
  RSA756334  Sidalcea keckii David Gowen 2008-5-24 921 Colusa Stoneyford Ladoga Road, about 1.6 miles south of Stoneyford. Comment
  JEPS75730  Sidalcea oregana subsp. hydrophila L. R. Heckard 1974-9-9 3868 Colusa just ne of rocky promontory se Foutch Camp; Snow Mt., se of Foutch Camp 1798 Comment
  JEPS75834  Silene californica L. R. Heckard 1974-9-11 3950 Colusa on Foutch Camp--Box Spring trail just w Trout Creek crossing (Snow Mt.); , w of Trout Creek crossing on Foutch Camp-Box Sprin 1828 Comment
  UCD111674  Silene campanulata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  JEPS86785  Silene campanulata subsp. campanulata Craig D. Thompson 1989-6-3 1564 Colusa ca 1/2 mi e Cook Springs; e of Cook Springs Comment
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
Read comments
Aug 11 2014
  UCD146701  Silene laciniata subsp. californica G. F. Hrusa 1998-6-19 14603 Colusa above upper Little Stony Creek. Goat Mountain Road around 2 km west of campground. 490 Comment
  UCD98993  Silene laciniata subsp. californica Cherry Kline 1964-5-2 51 Colusa Bear Creek Canyon, 3 miles north of the Wilbur Springs turnoff on State Highway 20. Comment
  JEPS83163  Sinapis alba L. R. Heckard with J. Hickman 1980-7-3 5332 a Colusa SW Snow Montain, just W of Summit Springs 1548 Comment
  RSA249346  Sinapis arvensis Thomas W. Nelson 1972-4-8 605 Colusa Beside the Bear Valley road ca 2 mi N of Hwy 20. Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  CHSC115383  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 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
  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
  HSC31401  Sisyrinchium bellum Maralyn O'Meara, Gary S. Lester 1974-5-4 349 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 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
  SBBG128715  Sisyrinchium bellum L. Ahart, J. Dittes, J. Guardino 2013-4-26 18644 Colusa N side of State Hwy 20, just E of Lake County Line, 12.2 mi ENE of Clear Lake (town), 17.1 mi W of Williams 566 Comment
  SEINET3887835  Smilacina racemosa var. amplexicaulis Barbara Bogert 1970-5-23 16 Colusa Bear Valley Road 2.5 miles north of State Highway 20.; 0 183 Comment
  CHSC112626  Solanum americanum Lowell Ahart 2013-10-1 19082 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
  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
  CHSC28810  Solanum parishii Laraine Roothoff 1979-3-31 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC57525  Solanum parishii Shelly A. Kirn 1991-4-6 12 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  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
  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
  UCD84438  Solanum parishii Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6048 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
  CDA41194  Solanum parishii T. C. Fuller 1958-5-27 s.n. Colusa Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  CDA6240  Solanum pseudocapsicum M. H. Handley 1961-7-24 Colusa 0 Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  CHSC91068  Solidago velutina subsp. californica D. Isle 2002-8-12 180 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 585 Comment
  JEPS80224  Sonchus asper L. R. Heckard and J. Hickman 1980-7-3 5381 Colusa slopes about Summit Springs (sw slope Snow Mt.); sw slope Snow Mt. 1554 Comment
  CHSC107288  Sonchus asper subsp. asper L. P. Janeway; B. Castro 2011-7-9 10511 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. Just off of the northwest corner of the marsh. 49 Comment
  CAS-BOT-BC236520  Sorghum bicolor Mary L. Bowerman 1940-1-1 3836 Colusa Wall Point Trail, Mount Diablo Comment
  POM313124  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. 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
  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-BC390100  Spergularia bocconi A. A. Heller 1916-6-9 12392 Colusa Along the state highway near Colusa Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  UC8724  Spergularia macrotheca var. leucantha J. Burtt Davy May, 1898 4272 Colusa near Willows; near Willows Comment
  UCD99217  Spergularia macrotheca var. leucantha Malcolm A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99 W, near Delevan. Comment
  CAS-BOT-BC390758  Spergularia marina A. A. Heller 1921-4-10 13541 Colusa Near Colusa Comment
  CHSC107953  Spergularia marina B. Castro; T. Boullion 2011-4-20 1836 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  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
  POM62479  Stachys ajugoides Roxana Stinchfield 1916-7-11 427 Colusa Davis Tule, near Sycamore Slough. Comment
  SEINET9361561  Stachys ajugoides var. ajugoides Unknown 1999-8-18 15241 Colusa Bear Valley Comment
  CDA41022  Stachys ajugoides var. ajugoides D. Brown 1972-6-16 s.n. Colusa Geo. Lodi Prop., Grimes. 0 Comment
  JEPS110534  Stachys ajugoides var. rigida Lowell Ahart 2006-10-31 13539 Colusa On the south side of road M 10, about 6 miles by road west of Stonyford 583 Comment
  CHSC106246  Stachys albens B. Castro; L. P. Janeway 2001-6-3 1256 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. 880 Comment
  CHSC112627  Stachys albens Lowell Ahart 2013-10-1 19079 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
  JEPS120807  Stachys albens Lowell Ahart 2013-10-1 19079 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
  UCD164144  Stachys albens Craig Thomsen 1997-6-21 1933 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  UCD64039  Stachys albens Craig D. Thomsen 2000-6-23 2417 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
  RSA724895  Stachys rigida subsp. quercetorum L. Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  UCD64273  Stellaria media Craig D. Thomsen 2000-3-31 2074 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
  CHSC86516  Stellaria nitens B. Castro 2003-3-17 1382 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  UCD112598  Stellaria nitens Christopher Mallek 2008-4-17 WR2- 2 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 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
  UCD66948  Stephanomeria virgata Ellen Dean; Davis Botanical Society 2008-5-31 4993 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD55447  Stephanomeria virgata subsp. pleurocarpa Ellen Dean; Gordon Harrington 2006-10-6 3272 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
  UCD167947  Streptanthus James Neilson 1982-7-1 4088 Colusa near mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  CAS-BOT-BC61238  Streptanthus breweri Alice Eastwood; John Thomas Howell 1938-5-16 5627 Colusa Lake-Colusa county line. On road to Williams. Comment
  CDA15504  Streptanthus breweri G. F. Hrusa, WTD 1998-6-19 14642 Colusa North Coast Ranges; Above Fouts Springs (overlooking settlement) on Trough Ridge Rd. to Stonyford. Comment
  UCD115959  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD164311  Streptanthus breweri Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 553253, 4318610. [UTM coordinates place this location along Bear Valley Rd., north of HWY 20.] 381 Comment
  CAS-BOT-BC61235  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  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
  UC1552822  Streptanthus breweri var. breweri Frederica Bowcutt 1985-5-10 510 Colusa road bank along Bear Valley Rd about 3 mi se Wilbur Springs (1 mi w of Hwy 20); Wilbur Springs 15' Quad Comment
  UC956510  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-18 1019 Colusa Wilbur Springs Road Comment
  UCD58119  Streptanthus breweri var. breweri Ellen Dean; PLB 102 Class 2007-4-29 3714 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Craig Canyon. Along unimproved road. 328 Comment
  CHSC35582  Streptanthus glandulosus J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  CHSC56756  Streptanthus glandulosus Joel Hoskins 1989-4-1 1 Colusa Ca. 5 yds n of Hwy 20, Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi. wsw of Williams. 143 Comment
  HSC45730  Streptanthus glandulosus M. Alcasas 1978-4-22 41 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CAS-BOT-BC87086  Streptanthus glandulosus subsp. glandulosus Robert F. Hoover 1938-4-23 3205 Colusa Grade on Rumsey-Arbuckle Road. Comment
  CHSC71110  Streptanthus glandulosus subsp. glandulosus Jan Monelo 1989-4-1 4 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  JEPS16222  Streptanthus glandulosus subsp. glandulosus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3183 Colusa burned slope just w base of grade to Indian Valley (Bartlett Mt. Road) (just w of Bear Valley); Inner North Coast Ranges Comment
  UC1552823  Streptanthus glandulosus subsp. glandulosus Frederica Bowcutt 1985-5-10 513 Colusa about 3 mi se Wilbur Springs (1 mi w of Hwy 20, base of steep s-facing hillsides); Wilbur Springs 15' Quad, Big Valley Shale Barrens Comment
  CAS-BOT-BC87396  Streptanthus morrisonii G. L. Stebbins 1966-6-6 6431 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stonyford. 609 Comment
  SEINET11993694  Streptanthus morrisonii Unknown 1984-1 RR 40260 Colusa W of Ladoga, Goat Mt Rd, along Little Stonyford Cr (ca 0.3 mi W of rd origin at Ladoga-Stonyford Rd) 442 Comment
  UCR141627  Styrax officinalis var. californicus Roman Gankin 1959-4-19 330 Colusa Along road to Walker Ridge from Bear Valley Comment
  CAS-BOT-BC48092  Styrax redivivus A. A. Heller 1919-5-10 13111 Colusa Grade west of Leesville Comment
  UCD163316  Styrax redivivus Craig D. Thomsen 1997-4-13 1905 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD66531  Styrax redivivus Craig D. Thomsen 2000-4-28 2231 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
  CHSC92638  Symphyotrichum spathulatum D. Isle 2005-9-14 1172 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
  JEPS75728  Symphyotrichum spathulatum L. R. Heckard 1974-9-9 3864 Colusa just ne of rocky promontory se of Foutch Camp; Snow Mt. 1920 Comment
  JEPS80880  Symphyotrichum spathulatum L. R. Heckard and J. C. Hickman 1981-7-31 5801 Colusa Dark Hollow Creek, (e side of Snow Mt.) Snow Mt. 1645 Comment
  UCD136692  Symphyotrichum subulatum var. parviflorum P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  UCD136679  Symphyotrichum subulatum var. parviflorum C. F. Dunshee 1922-9-10 s.n. Colusa Rice fields. Comment
  CHSC81317  Tamarix parviflora J. Trizzino 2001-3-31 11 Colusa Bear Valley drainage near southern entrance to valley along eastside Bear Valley Road. 408 Comment
  HSC62945  Tamarix parviflora Marla J. Carollo 1979-4-14 29 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  RSA296726  Tamarix parviflora Michael Dalke 1979-4-14 51 Colusa Bear Valley Road, 3.9 miles N of State Route 20. 412 Comment
  UCD101735  Tamarix parviflora Beecher Crampton 1958-4-21 4731 Colusa Bear Creek at junction with Cache creek, 7.8 miles NW of Rumsey, along Hwy 16. Comment
  UCD101743  Tamarix parviflora S. R. Sims 1971-4-24 34 Colusa 16 miles northwest of Rumsey; along a watercourse. Comment
  UCD57549  Tamarix parviflora Cindy Yip; 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. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  CHSC77357  Tetrapteron graciliflorum L. P. Janeway; B. Castro, Mary Ann Griggs, Beth Hendrickson 1999-4-12 6401 Colusa Vicinity of Logan Ridge, Funks Creek, and 'Golden Gate. 152 Comment
  UCD71257  Tetrapteron graciliflorum Kathi A. Zurakowski 1984-4-29 s.n. Colusa Bear Valley, 3.2 miles north of Wilbur Springs turnoff; in field west of road; in heavy clay soil; in full sun; yellow flowers, red in age. 381 Comment
  UCD81709  Thalictrum fendleri var. polycarpum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5715 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
  UCD146699  Thinopyrum intermedium G. F. Hrusa 1998-6-19 14614 Colusa above upper Little Stony Creek. Goat Mountain Road around 1.5 km west of campground. 485 Comment
  UCD61467  Thinopyrum ponticum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3913 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 1/2 mile south of parking lot, along Bear Creek. 312 Comment
  UCD93333  Thinopyrum ponticum Beecher Crampton 1963-8-5 6867 Colusa 1/4 mile E of Cortena. Comment
  SEINET3166339  Thysanocarpus curvipes subsp. curvipes P. J. Alexander, C. D. Bailey 2009-3-31 972 --1 Colusa Eastern foothills of the North Coast Ranges, east side of High Valley on Leesville Rd., 1.4 miles SE of Leesville, 14.5 miles west of Williams. 503 Comment
  SEINET3166341  Thysanocarpus curvipes subsp. curvipes P. J. Alexander, C. D. Bailey 2009-4-1 973 Colusa East slope of the North Coast Ranges, Mendocino National Forest, east side of Mill Creek 0.8 miles SSW of its confluence with South Fork Stony Creek, 6.3 miles WSW of Stonyford. 509 Comment
  UCD56905  Thysanocarpus curvipes subsp. curvipes Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3508 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD64265  Thysanocarpus curvipes subsp. curvipes Craig D. Thomsen 2000-3-31 2061 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
  CHSC62927  Thysanocarpus curvipes var. curvipes Vernon H. Oswald; Lowell Ahart 1994-4-6 6064 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On the slopes bordering Sullivan Creek. 469 Comment
  JEPS95451  Thysanocarpus curvipes var. curvipes Vernon H. Oswald and L. Ahart 1994-4-6 6064 Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. Occasional groups of plants in gravelly soil (serpentine) on the slopes bordering Sullivan Creek. 469 Comment
  HSC47458  Thysanocarpus laciniatus J. P. Smith 1978-4-22 9746 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS87659  Thysanocarpus laciniatus Vernon H. Oswald and Lowell Ahart 1994-4-6 6065 Colusa s. Stonyford (Goat Mtn. Rd at Sullivan Creek, 1.2 mi sw of Digger Pine Flat); Sullivan Creek, sw of Digger Pine Flat 469 Comment
  SEINET5731492 Image available Thysanocarpus radians Frank Polach 1967-1 20 Colusa Bear Valley; Bear Valley 402 Comment
  UCD66585  Torilis arvensis Craig D. Thomsen 2001-5-24 2530 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
  UCD139848  Toxicoscordion fremontii G. Robinson 1984-4-21 2 Colusa Bear Valley; west of Wilbur Springs Road, 3.2 miles north of Highway 20, east of a creek, along a fence. 390 Comment
  CHSC62951  Toxicoscordion paniculatum Vernon H. Oswald; Lowell Ahart 1994-4-6 6073 Colusa Goat Mtn. Rd. 1.5 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. 518 Comment
  UCD164039  Toxicoscordion venenosum var. venenosum Amber Flores 2016-4-9 5 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. On north side of hill just south of corral at 16 and 20. 398 Comment
  UCD136900  Trichocoronis wrightii S. Galen Smith; Malcolm A. Nobs 1949-9-10 1890 Colusa 17 miles north of Knights Landing. Comment
  RSA700359  Trichostema laxum L. P. Janeway 2001-6-6 7113 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. 703 Comment
  UCD64037  Trichostema laxum Craig D. Thomsen 2000-6-23 2414 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
  UC726704  Trichostema laxum A. A. Heller 1941-9-22 16330 Colusa just E of Lake Co. line Comment
  UCSC004744  Trifolium Randall Morgan 1995-5-16 2628 Colusa Bear Valley Comment
  UCSC005368  Trifolium Randall Morgan 1995-5-16 2628 Colusa Bear Valley Comment
  UC1049532  Trifolium albopurpureum var. albopurpureum Rimo Bacigalupi 1950-4-16 3113 Colusa 4 mi s Ladoga (6 mi n of Leesville, along Little Indian Creek); Inner North Coast Ranges, eastern base, Indian Valley Comment
  CHSC70981  Trifolium albopurpureum var. dichotomum Vernon Oswald; Lowell Ahart 1998-5-7 9001 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
  UCD107898  Trifolium bifidum var. bifidum E. W. Laubscher 1958-3-7 8 Colusa State Highway 16, 2 miles N of Yolo-Colusa county line. Comment
  CHSC89884  Trifolium ciliolatum B. Castro; L. Janeway 2001-5-2 1241 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak wood-land. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  POM277648  Trifolium depauperatum var. amplectens Lyman D. Benson 1929-3-26 1047 Colusa Williams Comment
  UCD163677  Trifolium depauperatum var. depauperatum Craig Thomsen 1999-4-15 1978 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD58093  Trifolium depauperatum var. depauperatum Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3470 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
  JEPS89584  Trifolium depauperatum var. truncatum Dean W. Taylor 1992-4-16 12407 Colusa stony hillside ca. 0.4 mi. due w. from spillway into Little Stony Creek (East Park Reservoir); Inner N. Coast Range, Gilmore Peak Quad. 411 Comment
  UCD81251  Trifolium depauperatum var. truncatum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5415 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located to the south of Brophy Canyon and north of the road leading up from the confluence of Bear and Cache Creeks. 365 Comment
  UCR146312  Trifolium fragiferum Beecher Crampton 1961-7-20 5933 Colusa 2 mi south of Grimes Comment
  UCD109037  Trifolium fucatum Clinton C. Shock 1980-5-3 60 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  UCD64245  Trifolium fucatum Craig D. Thomsen 2000-3-31 2047 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
  SEINET7413831  Trifolium fucatum M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  UCD35784  Trifolium fucatum Beecher Crampton 1962-4-17 6221 Colusa 3.3 miles north of College City. Comment
  UC80532  Trifolium gracilentum Katharine Brandegee Apr 1889 Colusa Leesville Comment
  UCD57552  Trifolium hirtum Andrew Pedersen; 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. 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. 304 Comment
  UCD63738  Trifolium hirtum Craig D. Thomsen 2008-5-23 2744 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. 415 Comment
  UCR212361  Trifolium hirtum Craig D. Thomsen 2000-4-12 2143 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
  RSA0118784  Trifolium microcephalum Lowell A. Ahart 2013-5-1 18693 Colusa On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  JEPS121122  Trifolium obtusiflorum Lowell Ahart 2013-5-1 18679 Colusa On the N side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS80818  Trifolium obtusiflorum L. R. Heckard and J. C. Hickman 1981-7-31 5789 B Colusa Box Spring Snow Mtn (e side of mountai4600 ft) Comment
  RSA0118786  Trifolium obtusiflorum Lowell A. Ahart 2013-5-1 18679 Colusa On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  SBBG119886  Trifolium obtusiflorum L. Ahart 2006-8-9 13130 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  CDA14355  Trifolium obtusiflorum D. Brown 1995-7-26 Colusa Bear Valley south of Leesville. 0 Comment
  JEPS82351  Trifolium variegatum var. variegatum L. R. Heckard 1969-5-28 2234 Colusa ca 6 air mi w Stonyford (along Stony Creek); Four Springs Comment
  UCD163667  Trifolium willdenovii Craig Thomsen 1999-4-15 1967 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD64425  Trifolium willdenovii Craig D. Thomsen 2000-4-28 2192 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
  UCD82622  Triglochin maritima Craig Thomsen; G. Harrington 2009-5-12 2892 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD149528  Trillium albidum Greg Kareofelas 2013-4-25 s.n. Colusa Colusa County; north of Lily Pond, Mill Valley Campground, along Forest Route AN02. In the Mendocino National Forest, between Snow Mountain and Goat Mountain. 1228 Comment
  UCD58100  Triphysaria eriantha Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3477 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
  CHSC110856  Triphysaria versicolor David Isle 1989-5-14 1996 Colusa Pendell Ranch ~2 miles W of Co. Rd. 306 junction with Fouts Springs Foad; about 150 yds south of Pendell home. 384 Comment
  UC1613367  Triteleia ixioides Charles M. Belshaw April 1937 2859 Colusa vicinity of Cook's spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  SEINET199007  Triteleia laxa Helen K. Sharsmith 1953-6-19 4270 Colusa Mendocino National Forest ; East slope Snow Mountain near Paradise Creek in mixed chaparral and forest 823 Comment
  UCD64413  Triteleia laxa Craig D. Thomsen 2000-4-12 2140 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
  UCR233442  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17130 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  HSC72157  Triteleia laxa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9531 Colusa Bear Valley Rd, 3 mi. from its junction with SR 20 366 Comment
  RSA0021580  Triteleia laxa M. Bourell 1997-3-29 5809 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground. Comment
  RSA304265  Triteleia laxa James R. Shevock 1971-4-8 937 Colusa Bear Valley Road 610 Comment
  UC1051718  Triteleia laxa Helen K. Sharsmith 1953-6-19 4270 Colusa e slope of mountain near Paradise Creek; Inner Northern Coast Ranges, Mendocino National Forest, Snow 822 Comment
  CHSC71456  Triteleia peduncularis Vernon H. Oswald; Lowell Ahart 1998-7-15 9272 Colusa Bartlett Sptings Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS93801  Triteleia peduncularis Vernon H. Oswald and Lowell Ahart 1998-7-15 9272 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  SEINET12048047  Triteleia peduncularis R. A. DeMartile 1983-1 108 Colusa Barlett Springs Road N of Baldy Mt 762 Comment
  UCD61469  Typha domingensis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3915 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 1/2 mile south of parking lot, along Bear Creek. 312 Comment
  CDA12375  Umbellularia californica G. F. Hrusa 1996-1-2 12628 Colusa Inner North Coast Ranges; Little Stony Creek, +/- 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  HSC71308  Umbellularia californica Thomas W. Nelson, Jane P. Nelson 1979-4-12 4618 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD80840  Umbellularia californica Jack Alderson 2009-2-21 21 Colusa BLM Payne Ranch (Bear Creek Ranch), lands to the SW of intersection of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CHSC115397  Uropappus lindleyi Lowell Ahart 2015-4-1 19997 Colusa Inner North Coast Range. 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. 520 Comment
  UC71622  Uropappus lindleyi Miss Alice King 1905-1 Colusa College City Comment
  UCD163225  Uropappus lindleyi Craig D. Thomsen 2001-4-12 2456 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
  UCD163328  Uropappus lindleyi Craig D. Thomsen 2009-5-3 2794 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  CHSC94983  Urtica dioica subsp. gracilis Lowell Ahart 2006-10-31 13535 Colusa West of a small stream, Big Springs, on the south side of Letts Lake, about 13 miles (air) southwest of Stonyford. 1529 Comment
  RSA718531  Urtica dioica subsp. gracilis L. Ahart 2006-10-31 13535 Colusa Big Springs, on the south side of Letts Lake, about 13 miles (sir) SW of Stonyford. 1530 Comment
  UCD72462  Velezia rigida Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3796 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  UC27673  Verbascum blattaria J. Burtt Davy May, 1898 4302 Colusa near Princetown; near Princetown Comment
  UC1736436  Verbena brasiliensis Dean W. Taylor 1993-8-31 14068 Colusa Sacramento National Wildlife Refuge, along North Fork Logan Creek 24 Comment
  UCD163862  Verbena lasiostachys Craig D. Thomsen 2001-5-31 2547 b Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD58176  Verbena lasiostachys Gordon Harrington 2007-5-31 65 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. 350 Comment
  CHSC94522  Verbena lasiostachys var. lasiostachys Lowell Ahart 2006-8-22 13212 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC384658  Verbena lasiostachys var. scabrida Andrew Townesmith; Karen M. Meyer 2007-8-7 913 Colusa Mendocino National Forest, Grindstone Ranger District. Lily Pond, off Forest Service road 17N02, 1.7 miles SW of intersection with Forest Service route M10 1264 Comment
  JEPS120798  Verbena lasiostachys var. scabrida Lowell Ahart 2013-10-1 19091 -A 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
  RSA794841  Veronica anagallis-aquatica D. Isle 2008-4-17 1935 Colusa 5 miles north of Maxwell; south of Delevan Road; 0.6 miles west of I-5 Overpass; in irrigation ditch water on west side of 10 rice checks on Ruesser Moore property. 30 Comment
  JEPS16487  Veronica peregrina subsp. xalapensis W. L. Jepson 1934-5-3 16599 Colusa n of Colusa (Stegeman Station); Stegeman Station Comment
  UCD67078  Veronica peregrina subsp. xalapensis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5102 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
  JEPS75716  Veronica serpyllifolia subsp. humifusa L. R. Heckard 1974-9-9 3842 Colusa just se of Foutch Camp (Snow Mountain); Snow Mountain 1889 Comment
  CHSC59717  Vicia americana var. americana Darci Field 1977-4-16 21 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi s w of Williams. 321 Comment
  HSC45726  Vicia cracca Patricia Shesgreen 1978-4-22 45 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD67122  Viola adunca subsp. adunca Ellen Dean; Davis Botanical Society 2008-5-31 5054 Colusa West of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs, east side of road. Comment
  RSA261548  Viola adunca subsp. adunca Michelle Yeargan 1973-5-12 Y 049 Colusa Letts Valley, 16 miles west of Stonyford, Mendocino National Forest. Comment
  CAS-BOT-BC105092  Viola douglasii R. C. Wenk; Davis Botanical Society 2009-3-28 1023 Colusa Cache Creek Natural Area, Destinella Flat. S side of Hwy 20, 4.0 kms (air) NW of intersection of Hwys. 16 & 20, near 560 Comment
  HSC31310  Viola douglasii Carter Schleicher 1974-5-4 26 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS89164  Viola douglasii Thomas W. Nelson and Jane P. Nelson 1980-6-24 5878 Colusa along road to Snow Mountain trail head at Summit Springs; Six Rivers National Forest 1584 Comment
  SEINET175300 Image available Viola douglasii V. Duran 1933-4-2 3379 Colusa Stonyford 305 Comment
  UC1049531  Viola douglasii Rimo Bacigalupi 1950-4-16 3115 Colusa 4 mi s of Lodoga (and 6 mi nnw of Leesville, along Little Indian Creek, e base of the Inner North Coast Ranges); Inner North Coast Ranges, Indian Valley 396 Comment
  UC519681  Viola douglasii Victor Duran 1933-4-2 3379 Colusa Stonyford 304 Comment
  RSA293110  Viola douglasii Thomas W. Nelson, Jane P. Nelson 1980-6-24 5878 Colusa Along road to Snow Mountain trail head at Summit Springs. 1585 Comment
  SEINET6176898  Viola douglasii Thomas W. Nelson, Jane P. Nelson 1980-6-24 5878 Colusa Lake Pillsbury Quad. Along road to Snow Mountain trail head at Summit Springs. Serpentine.; 0 1585 Comment
  UC1005691  Viola douglasii Frank W. Gould 1939-4-7 627 Colusa on road from Knoxville to Rumsey (just n of county line) Comment
  UCD15438  Viola douglasii Lisa Montang 1985-4-13 8 Colusa Bear Valley, 8.6 miles north of Bear Valley Road and Highway 20 intersection; 441 Comment
  UCD40926  Viola douglasii G. Robinson 1984-4-21 16 Colusa Northwest of Barrel Springs Campground (ca. 200 m) off Barrel Springs Road. Adjacent to water well. 701 Comment
  JEPS74658  Viola purpurea subsp. integrifolia James E. Eckenwalder 1974-6-2 360 Colusa on w flank of east peak of Snow Mountain Snow Mountain Comment
  UCD67043  Viola purpurea subsp. integrifolia Ellen Dean; Davis Botanical Society 2008-5-31 5022 Colusa West of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  CHSC111698  Viola purpurea subsp. venosa David Isle 1977-4-5 2066 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. 1.3 mile NE of Fouts Springs on Upper Davis Flat. 493 Comment
  UCR281736  Vitex agnus-castus David Isle, Tony Murray 2015-6-22 2158 Colusa Sacramento Valley Foothills, 480 3rd Street Stonyford, south or garage; Tony Murray (Phil Shimme) Place 366 Comment
  CAS-BOT-BC203034  Vitis californica Roxana S. Ferris 1926-4-22 6303 Colusa Sycamore Slough near Sycamore Comment
  UCD13385  Vitis californica Charles Martin 1986-5-17 36 Colusa Medocino National Forest. 3.7 miles W of Stonyford or Forest Service Rd. 18 NO1. Comment
  UCD70301  Vitis californica D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  POM198504  Vulpia bromoides Roxana S. Ferris 1917-4-12 495 Colusa 4 miles east of Williams. Comment
  UCD93818  Vulpia microstachys var. ciliata Beecher Crampton 1958-5-19 4794 Colusa 10.1 miles southeast of Leesville. Comment
  JEPS80142  Vulpia microstachys var. confusa L. R. Heckard and J. Hickman 1980-7-2 5303 Colusa ca 10 mi w Stonyford (trail from Summit Springs to Snow Mt. peaks, Colusa-Lake county boundary); Snow Mt. 1661 Comment
  UC766752  Vulpia microstachys var. confusa R. F. Hoover 1938-4-23 3208 Colusa Upper Sand Creek Comment
  UCD93940  Vulpia microstachys var. confusa Beecher Crampton 1958-4-21 4723 Colusa along State Hwy. 16, junction of Bear and Cache Creeks, 7.4 miles northwest of Rumsey. Colusa-Yolo county line. Comment
  CDA14184  Vulpia microstachys var. pauciflora G. F. Hrusa 1993-5-2 10857 Colusa Inner North Coast Ranges; Frenzel Creek Research Natural Area - Mendocino National Forest. Serpentine substratum. Colony on flat on top of boulder on E ridge above Frenzel Creek. Annual. Comment
  JEPS75409  Vulpia microstachys var. pauciflora W. L. Jepson 1932-5-8 16290 Colusa Stonyford 365 Comment
  SEINET3873246  Vulpia myuros Richard R. Halse 2011-3-20 8133 Colusa Williams; by junction of 5th Street and B Street; weedy vacant lot.; 0 25 Comment
  UC71626  Wyethia helenioides Miss Alice King 1905-1-1 Colusa College City Comment
  UCD137098  Xanthium spinosum H. R. Drever 1945-8-24 s.n. Colusa Near Grimes. Comment
  UC2042510  Zeltnera trichantha Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 6.2 miles N from its intersection with Highway 20. Comment
  UCD163649  Zeltnera trichantha Craig Thomsen 1998-6-10 1945 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  SEINET215154  Zigadenus fremontii Barrie Stanfield 1966-4-16 23 Colusa 2 miles north of Wilbur Springs Comment
  CAS-BOT-BC530510  Zigadenus fremontii Wayne Roderick 1967-5-7 s.n. Colusa In a hay field, Bear Valley near Leesville 304 Comment
  SEINET3889547  Zigadenus fremontii D. W. McNeal 1983-5-1 2804 Colusa Above a road cut above Hwy. #20, 2.1 mi. w. of the jct. of Hwy. #16.; 0 Comment
  CDA11390  Zigadenus micranthus G. F. Hrusa, K. van Katwyk 1995-4-22 12110 Colusa Inner North Coast Ranges; Approximately 2 m. S of intersection of Walker Ridge road and Bartlett Springs Rd. on Walker Ridge Rd. Comment
  HSC72178  Zigadenus paniculatus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9556 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  RSA589935  Zigadenus venenosus Michael A. Vincent, Robert Rhode 1996-3-30 7306 Colusa Along Walker Ridge Road, 0.5 mile south of the junction with Brim Road Comment



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