Search Results — 2000 specimen records retrieved (1622 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
  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-BC334173  Acer negundo var. californicum Roxana Stinchfield 1916-7-8 398 Colusa Sycamore Slough, Stinchfield Ranch Comment
  HSC45700  Achillea millefolium Sheila Logan 1978-4-22 62 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC105753  Achyrachaena mollis Christine C. Lorain 1989-4-15 1853 Colusa Junction of Hwy 20 with Hwy 16, 41 miles SW of Williams. 152 Comment
  CHSC27825  Achyrachaena mollis K. D. Whitney 1978-4-8 32 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
  CHSC81215  Achyrachaena mollis Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  UCD163687  Achyrachaena mollis Craig Thomsen 1999-4-15 1989 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  POM284473  Achyrachaena mollis Lyman Benson 1933-4-16 4330 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  UCSC001480  Achyrachaena mollis Peter Kamb 1950-1 1691 Colusa Stony ford Comment
  CHSC94284  Acmispon americanus var. americanus Lowell Ahart 2006-8-9 13112 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  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
  UCR261667  Acmispon brachycarpus Ann Howald 2003-6-9 2367 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, north of Last Chance camping area 372 Comment
  UCR261746  Acmispon brachycarpus Ann Howald 2003-6-9 2362 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCD163334  Acmispon grandiflorus Craig D. Thomsen 2009-5-3 2805 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCD84430  Acmispon grandiflorus Ellen Dean; C. Thomsen, G. 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. 769 Comment
  UCSB61633  Acmispon grandiflorus Heckard, L. 1969-5-28 Colusa Road above and west of Fouts Springs 762 Comment
  SBBG100086  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Trough Spring Ridge Rd, 0.2 mi N of its jct with Crackerbox Ridge Rd, ca. 6.5 air mi SE of Stonyford 1127 Comment
  HSC48196  Acmispon micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3960 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CHSC79504  Acmispon rubriflorus B. Castro; L. P. Janeway 2000-5-3 1121 Colusa Vicinity of Sites, Huffmaster Rd,and Antelope and Grapevine Creeks, just S of the divide between the two creeks. 365 Comment
  UCR261740  Acmispon rubriflorus Ann Howald 2003-6-9 2364 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, just north of Eagle Eye camping area 377 Comment
  HSC44246  Acmispon wrangelianus Barbara Kelly 1977-4-24 351 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  UCD163209  Acmispon wrangelianus Craig D. Thomsen 2000-4-28 2200 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
  UCD57278  Acmispon wrangelianus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3646 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  HSC72177  Adenostoma fasciculatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9555 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UC217393  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains n. of town and e. of R.R. Hershey Comment
  UCD84556  Adenostoma fasciculatum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6081 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  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
  CHSC112264  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa Inner North Coast Range. On the south side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC114944  Adiantum jordanii Lowell Ahart 2015-4-1 19989 Colusa Northside 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. Chaparral. 520 Comment
  CHSC80490  Aegilops cylindrica Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD51585  Aegilops triuncialis D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Destanella Flat-Walker Ridge. 450 Comment
  UCR206362  Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14749 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  CDA4026  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  HSC59124  Aesculus californica Terry Roth 1979-5-7 40 Colusa Where Hwy. 20 enters Salt Canyon along Salt Creek 122 Comment
  JEPS81298  Agastache urticifolia L. R. Heckard and J. C. Hickman 1982-7-5 5912 Colusa s side Snow Mt. (along streamlet below Summit Springs); s side of Snow Mt. 1524 Comment
  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
  UCD67033  Agoseris heterophylla Ellen Dean; Davis Botanical Society 2008-5-31 5014 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  JEPS36283  Agoseris heterophylla var. cryptopleura W. L. Jepson 1920-5-24 9029 Colusa Bear Valley Comment
  JEPS35661  Agoseris heterophylla var. cryptopleura W. L. Jepson 1932-5-7 16266 Colusa Indian Valley, north of Leesville. 518 Comment
  RSA424738  Agoseris heterophylla var. heterophylla Aaron Liston, M. A. Blumler 1987-4-26 667 -2 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  POM292576  Agoseris heterophylla var. heterophylla Lyman Benson 1933-4-16 4328 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 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
  UCD51826  Agrostis avenacea A. A. Beetle 1942-5-21 3274 Colusa 12 miles north of Williams. Comment
  CHSC94403  Agrostis exarata Lowell Ahart 2006-8-9 13167 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75878  Agrostis exarata L. R. Heckard 1974-9-10 3914 Colusa ne slope West Peak (Snow Mt); Snow Mt., West Peak 2072 Comment
  UCD64042  Agrostis exarata Craig D. Thomsen 2000-6-23 2427 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
  CHSC91020  Aira caryophyllea D. Isle 2002-4-18 298 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bathhouse Trail. 548 Comment
  CAS-BOT-BC445318  Alisma lanceolatum Milo S. Baker 1946-9-5 11631 Colusa Along Hiwy. bet. Colusa and Williams Comment
  UCR200661  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch, c. 0.25 mi. south of intersection between Hwy 16 and Hwy 20, near confluence of Hamilton Flat and Jackson Canyon drainages, c. 10 meters east of Bear Creek, west of Hwy 16 Comment
  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
  CHSC112205  Allium amplectens Lowell Ahart 2013-5-1 18682 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  POM174568  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford. 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
  UCD82863  Allium amplectens Gordon Harrington 2008-4-13 76 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 349 Comment
  CAS-BOT-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford Comment
  UC119994  Allium amplectens T. S. Brandegee 1890-6-22 Colusa Snow Mt. Comment
  UCD141837  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  CHSC14088  Allium falcifolium L. V. Ritter 1969-4-30 239 Colusa Ca. 100 yds. W of the junction of Highway 20 and 16, Ca 50 yds. N of Highway 20. Comment
  JEPS73488  Allium falcifolium L. R. Heckard 1972-7-9 3100 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2011 Comment
  UCD141834  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  UCD141854  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  UCD141855  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  SEINET12043975  Allium fimbriatum A. Eastwood, Howell, J. T. 1938-1 5626 Colusa Lake-- Colusa county line on road to Williams Comment
  SEINET12051857  Allium fimbriatum Unknown 1986-1 60124 Colusa W of Williams, Bear Valley area, Bear Valley Rd, ca .7 mi N of its origin at Rt.20 323 Comment
  CAS-BOT-BC135886  Allium fimbriatum subsp. purdyi James Jokerst 1985-4-5 2204 Colusa Wilbur Springs Quad., near Coyote Peak 456 Comment
  CAS-BOT-BC135884  Allium fimbriatum subsp. purdyi Katherine Esau 1934-5-5 s.n. Colusa West of Williams, Tahoe-Ukiah Highway Comment
  CHSC112220  Allium fimbriatum var. purdyi Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC42391  Allium fimbriatum var. purdyi Dale McNeal 1977-5-18 2028 Colusa Beside Hwy. 20, 0.9 mi. W of the junction with Hwy. 16 Comment
  HSC67119  Allium fimbriatum var. purdyi Dale McNeal 1980-4-26 2318 Colusa Above Bear Valley Rd., 1.4 mi. N of its junction with Hwy. 20 Comment
  UCD164168  Allium fimbriatum var. purdyi Craig Thomsen 2008-5-31 2761 Colusa Payne Ranch (Bear Creek Ranch) BLM. About 1 mile south of Hwy 20 junction, vicinity of Cowboy Camp. Comment
  UC725287  Allium fimbriatum var. purdyi A. A. Heller June, 1937 Colusa Lake Landing Comment
  CHSC32954  Allium serra Teri Barowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 47 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  HSC72137  Allium serra J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9569 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UC766754  Allium serra R. F. Hoover 1938-4-24 3216 Colusa w Arbuckle; Sand Creek foothills Comment
  CAS-BOT-BC475543  Allium serra Roxana S. Ferris 1917-4-14 557 Colusa Foothills 7 miles west of Arbuckle Comment
  CAS-BOT-BC475549  Allium serra James R. Shevock 1973-4-14 2551 Colusa Occasional along Leesville Road; Northern Coast Ranges Comment
  HSC47565  Allium serra J. P. Smith, J. O. Sawyer 1978-4-29 9793 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UCD141808  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mi. toward Clear Lake from junction of California Highway #16 and #20. Comment
  UCD141824  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  UCD141827  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa ca. 8.8 miles west of Maxwell (U.S. Highway 99W) or ca. 0.6 mile east of Sites about 180 feet northwest of bridge and old stone house. Comment
  UCD141829  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
  UCD15595  Allium serra Lisa Montany 1985-4-13 9 Colusa Bear Valley, 8.6 miles north of Wilbur Springs Rd and Hwy 20 intersection. 457 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
  UCD118016  Allophyllum gilioides Glen Holstein 1978-4-15 s.n. Colusa Along Bear Valley Road near Trout Creek bridge, Bear Valley. 402 Comment
  RSA783325  Allophyllum gilioides subsp. violaceum R. R. Halse 2010-3-25 7849 Colusa Along State Hwy 20 ca. 10.7 miles SW of its junction with Interstate Hwy 5 at Williams. In Salt Canyon. 154 Comment
  JEPS80816  Alnus rhombifolia L. R. Heckard and J. C. Hickman 1981-7-31 5789 Colusa Trout Creek-Box Spring trail Snow Mt., Paradise Creek (along creek, e side of mt.) 1371 Comment
  CDA11421  Alopecurus saccatus G. F. Hrusa, K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges; Low wet site in full sun along N side of Leesville Rd. approx. 4 m. NW of Hwy. 20. Annual. Comment
  RSA198503  Alopecurus saccatus Roxana S. Ferris 1917-8-12 549 Colusa 4 miles east of Williams, alkali plains. Comment
  UCR201557  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14271 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 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
  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
  UCD39269  Amaranthus palmeri B. Crampton 1958-6-26 4973 Colusa Grieve road just n.e. of Hershy R.R. siding, 5.5 miles south of College City, Colusa County. Comment
  CHSC84959  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 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
  RSA724821  Ambrosia psilostachya L. Ahart 2006-9-29 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5.5 mileseast of Maxwell. 24 Comment
  CAS-BOT-BC55586  Ambrosia psilostachya Milo S. Baker 1946-9-4 11591 Colusa Butte Sink, along Gridley-Princeton Road Comment
  CHSC25321  Ammi visnaga Hayes; Warner, Schlising 1977-8-23 48 Colusa Along River Rd. on the east side of the Sacramento River, 3.5 mi n Of Colusa. 50 Comment
  SEINET7096533  Amsinckia intermedia Richard R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52 N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  HSC31598  Amsinckia intermedia Thomas E. Higley 1974-5-5 84 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  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
  CHSC86519  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1396 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 323 Comment
  CHSC89610  Amsinckia lunaris B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1444 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 167 Comment
  SD237359  Amsinckia lunaris G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Ranges Foothills: along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek. 162 Comment
  UC1178230  Amsinckia lunaris Peter M. Ray 1950-4-16 1717 Colusa junction of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  UC1199518  Amsinckia lunaris Annetta Carter 1938-5-8 1385 Colusa 3 mi n Leesville (on Lodoga Road) Comment
  UC762196  Amsinckia lunaris R. F. Hoover 1938-4-23 3204 Colusa grade on Rumsey-Arbuckle Road Comment
  UCD63713  Amsinckia lunaris Craig D. Thomsen 2008-3-30 2722 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, near ridgeline and headwaters of Eula Canyon drainage. 501 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
  UCD83661  Amsinckia lunaris Gordon Harrington 2008-4-13 77 Colusa BLM Payne Ranch. Hills SW of junction of Hwy 16 and Hwy 20. W of unnamed creek (flowing now). 388 Comment
  CHSC107984  Amsinckia lycopsoides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1852 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Ca 250 ft SE of large +/- saline/alkaline wetland marsh. 59 Comment
  POM287399  Amsinckia lycopsoides Lyman Benson 1935-3-27 6343 Colusa Williams. 61 Comment
  UC1178228  Amsinckia lycopsoides Peter M. Ray 1950-4-15 1712 Colusa 1.5 mi s Lodoga (road to Leesville) 381 Comment
  UCD56909  Amsinckia menziesii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3512 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCR233359  Amsinckia menziesii var. menziesii George K. Helmkamp, E. A. Helmkamp 2011-4-1 17116 Colusa Western Sacramento Valley, along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UC1178293  Amsinckia tessellata var. gloriosa Ray and Chisaki 1952-3-29 K 125 Colusa Cache Creek Comment
  CHSC34508  Ancistrocarphus filagineus J. D. Prouty 1980-4-12 80 .66 Colusa Roadbank of Hwy 20 ca. 0.3 mi W of junction with Hwy 16 near Bear Creek Bridge. 320 Comment
  CHSC78593  Ancistrocarphus filagineus J. Marr; H. West, C. Warren, J. Lacey-Rickert, N. Wight 1998-4-14 Colusa Vicinity of Antelope Valley. 137 Comment
  SEINET7075569  Ancistrocarphus filagineus A. G. Vestal 1955-4-5 s.n. Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  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
  UCD56923  Ancistrocarphus filagineus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3526 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  UCD64285  Ancistrocarphus filagineus Craig D. Thomsen 2000-3-31 2118 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
  CHSC80415  Androsace elongata subsp. acuta C. Warren; G. Kuenster 2000-4-11 Colusa Vicinity of Sites, Huffmaster Rd, and Antelope and Grapevine Creeks, just N of the divide between the two creeks. 411 Comment
  CHSC81290  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2001-4-19 7025 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 280 Comment
  CHSC42572  Angelica tomentosa Vernon Oswald 1986-6-30 2178 Colusa Northwest side of Lily Pond near Letts Lake. 1188 Comment
  UC29539  Anthemis cotula J. Burtt Davy 1898-5-1 4280 Colusa Willows Comment
  CHSC83681  Antirrhinum subcordatum L. P. Janeway; Shirley Innecken 2002-5-1 7528 Colusa Inner North Coast Ranges. Vicinity of Grapevine Creek, Rena Canyon, and Scotties Canyon. 243 Comment
  UC726114  Antirrhinum subcordatum A. A. Heller 1940-6-7 15717 Colusa ridge e Lodogo Comment
  JEPS121750  Antirrhinum subcordatum David Isle, Ronda Isle 2013-5-19 2039 Colusa COLUSA County, CA. 01 mi E of Maxwell Grade Summit; burned SW asp. upper drainage slope N of Sites Lodoga Road. Comment
  UCD70221  Antirrhinum vexillocalyculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC115752  Antirrhinum virga David Isle 2015-6-20 2157 Colusa 10S -0533568E, 4357508N). North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill 200' S of 18N01 in 2012 Mill Fire area chaparral. N aspect, chamise chaparral; 50-80' above Quercus berberidifolia and #156 RIMA GPS. 439 Comment
  CHSC79556  Aphanes occidentalis B. Castro; L. P. Janeway 2000-5-4 1127 A Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  CHSC91007  Aphanes occidentalis D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. 548 Comment
  JEPS87724  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
  UCD170128  Apiastrum angustifolium Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  JEPS95645  Apocynum cannabinum Vernon H. Oswald and L. Ahart 1999-6-18 9773 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate 624 Comment
  UCD58178  Apocynum cannabinum Gordon Harrington 2007-5-31 64 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. 336 Comment
  UCD23339  Aquilegia eximia A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Partly shaded serpentine riparian habitat. 475 Comment
  JEPS75709  Aralia californica Alice Q. Howard 1972-7-10 13 Colusa Paradise Creek at crossing of trail between Fouts Camp and Box Springs; Snow Mt. 1371 Comment
  UCD66930  Arceuthobium campylopodum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail. Large, dammed stock pond, holding water still, in middle of meadow. Comment
  UC1078808  Arceuthobium campylopodum Job Kuijt 1957-4-30 1278 Colusa 1/2 mi towards Stonyford (blew the Old Mill Campground on the Stonyford Upper Lake Rd) 1127 Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  SEINET11989693  Arctostaphylos canescens R. A. DeMartile 1982-1 s.n. Colusa between Ladoga & Goat Mt. lookout 792 Comment
  CAS-BOT-BC25252  Arctostaphylos canescens subsp. canescens Roxana S. Ferris 1917-4-14 595 Colusa 5 mi. W of Arbuckle along Sand Creek Comment
  HSC92498  Arctostaphylos canescens subsp. sonomensis D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 9 Colusa On Walker Ridge Rd. 4.8 mi. N of junction with Indian Valley Access Rd. 976 Comment
  UCD13384  Arctostaphylos glandulosa Charles Martin 1986-5-17 34 Colusa Medocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service rd. 18 NO1 on Forest Service Rd 17 NO2. Comment
  UCD66998  Arctostaphylos glandulosa Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -b 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
  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
  CHSC31970  Arctostaphylos manzanita L. Ahart 1976-2-14 1002 Colusa Ca. 3 mi W of sites. 365 Comment
  HSC67141  Arctostaphylos manzanita J. P. Smith, Thomas W. Nelson 1976-4-14 8587 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD84554  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
  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
  UC1388337  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa road between Upper Letts Valley and Lower Letts Valley (w Colusa Co.); North Coast Ranges 1219 Comment
  CAS-BOT-BC24425  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-15 s.n. Colusa Stony Ford, nw. Colusa Co. 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
  SEINET7258424  Arctostaphylos manzanita subsp. roofii R. R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 mi WNW of its junction with State Hwy. 20. 378 Comment
  CDA15497  Arctostaphylos patula G. F. Hrusa, T. D. Wilfred 1998-6-19 14634 Colusa North Coast Ranges; Goat Mtn. around summit region. Comment
  CHSC22676  Arctostaphylos patula Robert A. Schlising; Glenn Keator 1962-1-31 2034 Colusa Coast Ranges. On Goat Mountain. 1097 Comment
  SFV8791  Arctostaphylos viscida S. C. Schank 1960-4-10 51 Colusa Above Cache Creek, 2 miles northwest of junction of Highway 16 and Highway 20 on road to Bear Valley. Comment
  CHSC62844  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald 1994-3-23 6011 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  UCD63712  Arctostaphylos viscida subsp. pulchella Craig D. Thomsen 2008-3-21 2721 Colusa BLM Payne Ranch. In narrow canyon just south of Hwy 20 (at Colusa Co. milepost 2.63), 0.5 mile west of intersection of Hwy 16 and Hwy 20. Comment
  CAS-BOT-BC44549  Arctostaphylos viscida subsp. viscida Eric B. Peterson; Thomas Ward; Matt Foruria 1995-4-1 47 Colusa Walker Ridge Rd., 0.9 mile NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek. 810 Comment
  RSA589937  Arctostaphylos viscida subsp. viscida Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7301 Colusa Along Brim Rd., 1.9 mi. W juct . Bear Valley Rd. Comment
  UC1299490  Arenaria congesta var. crassula Freed W. Hoffman 1947-6-20 1608 Colusa Nort Coast Ranges, summit of Goat Mountain Comment
  UCD82434  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CDA24525  Argemone munita subsp. rotundata R. Lawley 1960-5-22 Colusa Stonyford. 0 Comment
  CHSC112642  Artemisia douglasiana Lowell Ahart 2013-10-1 19098 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
  CHSC61398  Artemisia douglasiana Vernon H. Oswald 1993-8-16 5809 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, NE corner of Tract 41. 25 Comment
  CHSC94281  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  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
  JEPS104400  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  UCD121262  Asclepias cordifolia Jack Major 1966-6-6 s.n. Colusa At junction of Frenzel Creek with Stony Creek. 426 Comment
  CAS-BOT-BC222852  Asclepias solanoana Volney Rattan 1884-6-1 s.n. Colusa Above Fonts Springs, Colusa, Coast Mts. North of San Francisco Bay 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
  JEPS80758  Asclepias speciosa L. R. Heckard and J. C. Hickman 1981-7-29 5725 Colusa above Summit Springs (s side of mountain); Snow Mt., Colusa-Lake County Boundary 1554 Comment
  RSA74062  Aster sonomensis Milo S. Baker 1946-9-4 11618 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  SEINET12318320  Asteraceae J. A. LeFurgey 1978-1 4 Colusa ca 0.3 mi W of jct of hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  CHSC91565  Astragalus clevelandii D. Isle 1995-7-12 393 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Adjacent to BLM parcel 281-C. 585 Comment
  CDA11399  Astragalus gambelianus G. F. Hrusa, K. van Katwyk 1995-4-22 12119 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  CHSC101594  Astragalus gambelianus David W. Isle 2002-4-18 1659 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trail (Snow Mtn). MDB and M. 524 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
  UC638665  Astragalus gambelianus Ethel Crum 1938-5-7 2017 Colusa 4.2 mi n Rumsey (Inner North Coast Range, summit of ridge); Inner North Coast Range, summit of ridge, n of Rumsey 254 Comment
  SEINET4673433  Astragalus rattanii Richard R. Halse 2013-3-27 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53.; 0 558 Comment
  CHSC26263  Astragalus rattanii var. jepsonianus J. D. Jokerst 1977-4-16 62 Colusa S side of Bear Creek, Hwy. 20, ca. 18 mi sw of Williams, .3 mi w of jct. Hwys. 20 and 16. 321 Comment
  CHSC29256  Astragalus rattanii var. jepsonianus John Steiner 1977-4-16 46 Colusa Growing in an open field, ca. 0.5 km w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 322 Comment
  HSC44108  Astragalus rattanii var. jepsonianus Barbara Kelly 1977-4-24 390 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
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Jul 31 2014
  JEPS21844  Astragalus rattanii var. jepsonianus John R. Swanson 1958-4-26 280 Colusa along roadside on Bear Valley - Lodoga road 6.6 mi s Barlett Springs junction; Bear Valley - Lodoga Road 365 Comment
  RSA475188  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 701 -1 Colusa 0.45 miles from jct. Hwy 20 on Walker Ridge road. 600 Comment
  UC1613418  Astragalus rattanii var. jepsonianus Charles M. Belshaw 1937-4-25 2830 Colusa Cooks Spring, Devils Ridge Inner Coast Range, Cooks Spring, Devils Ridge Comment
  UC2029550  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-3-27 8764 Colusa Along State Highway 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Highway 20 and 53 Comment
  UCD64415  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD81236  Astragalus rattanii var. jepsonianus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5400 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 224 Comment
  RSA0003126  Astragalus tener var. ferrisiae Roxana S. Ferris 1926-4-21 6281 Colusa 3 mi W of Colusa.. Comment
  UCSB3001  Astragalus trichopodus var. lonchus Keator, Glenn 1958-4-16 Colusa Between Hough springs and Bartlett springs on road to Nice Comment
  CDA11922  Athysanus pusillus G. F. Hrusa 1989-5-7 6088 Colusa North Coast Biodiversity Arena; Cedar Mtn. Rd. along Little Stony Creek, approx. 4 miles above intersection with Stonyford-Lodoga Rd. Comment
  CHSC87153  Athysanus pusillus Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  JEPS53214  Athysanus pusillus W. L. Jepson 16277 Colusa Lodoga, in Coast Range foothills, w Colusa County Lodoga; Coast Range foothills, Lodoga 457 Comment
  SEINET5586423  Athysanus pusillus Richard R. Halse 2013-1 8763 Colusa Along State Hwy. 20 just eat of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53 558 Comment
  UCD114233  Athysanus pusillus Beecher Crampton 1958-4-21 4725 Colusa Colusa-Yolo County line, along State Hwy. 16, junction Bear and Cache Creeks, 7.4 miles northwest of Rumsey. Comment
  UCD58109  Athysanus pusillus Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3361 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. Grassland area to the SSE of Destanella Flat. 572 Comment
  UCR225263  Atriplex Craig D. Thomsen 2008-4-27 s.n. Colusa BLM Payne Ranch, lands to the southwest of the intersection of Hwys 20 and 16. Southwest of Cowboy Camp on the west side of Bear Creek 366 Comment
  UCR205145  Atriplex argentea George K. Helmkamp, E. A. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD66916  Atriplex argentea var. expansa Craig D. Thomsen; G. Harrington 2008-7-6 2783 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond ca. 0.2 miles to the south of Roadkill Cafe. 396 Comment
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Jun 8 2011
  RSA670513  Atriplex cordulata Stan C. Spencer 2002-8-8 unnumbered Colusa ca. 3-6 miles E of Colusa, along California Highway 20. 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
  CHSC80182  Atriplex depressa B. Castro; G. Kuenster 2000-7-19 1209 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 44 Comment
  CHSC80183  Atriplex fruticulosa B. Castro; G. Kuenster 2000-7-19 1208 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 42 Comment
  UCD163708  Atriplex joaquinana Craig Thomsen 1999-5-10 2020 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD97461  Atriplex joaquinana A. A. Heller 1916-6-9 12394 Colusa near Williams. Comment
  CAS-BOT-BC168435  Atriplex parishii var. persistens H. M. Hall 1920-7-12 11012 Colusa West of Princeton Comment
  JEPS100804  Atriplex persistens Dean W. Taylor 1993-7-9 13853 Colusa 300 m S of Sacramento National Wildlife Refuge headquarters; Sacramento National Wildlife Refuge 30 Comment
  RSA724831  Atriplex prostrata L. Ahart 2006-9-26 13347 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
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS90637  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Rd., along ditchbank) 39 Comment
  UCD65636  Avena barbata Craig D. Thomsen 2000-4-12 2148 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  SEINET10517556  Avena barbata Roxana S. Ferris 1917-4-18 Ferris 691 Colusa Zsni west of Arlrickle in open field. 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
  UCR225656  Avena fatua Craig D. Thomsen 2008-4-27 s.n. Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west northwest of Cowboy Camp on the west side of Bear Creek 452 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
  CAS-BOT-BC100066  Balsamorhiza macrolepis James Jokerst 1985-4-5 2210 Colusa Wilbur Springs Quad. Near Coyote Peak 456 Comment
  HSC41860  Balsamorhiza macrolepis K. Irwin 1977-4-24 299 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UC1585403  Balsamorhiza macrolepis R. Raiche 1989-5-23 90133 Colusa w of, n of Wilber Springs, se end of Walker Ridge, Sulpher Creek Drainage Williams; Sulpher Creek Drainage 610 Comment
  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
  UCD82586  Barbarea vulgaris Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2731 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1 mi E of Walker Ridge Rd. 609 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
  JEPS59784  Bassia hyssopifolia W. L. Jepson 1929-10-1 15341 Colusa Maxwell 25 Comment
  UC1613495  Berberis aquifolium var. dictyota Charles M. Belshaw 1937-4-25 2838 Colusa vicinity of Cook's Spring (Inner North Coast Range, Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  CDA11388  Berberis dictyota G. F. Hrusa, K. van Katwyk 1995-4-22 12108 Colusa Inner North Coast Ranges; Walker Ridge Road approximately 6 miles N of Highway 20. Comment
  SD131864  Bergia texana Barbara Ertter, Elizabeth Neese, et al. 1989-10-21 8869 Colusa Southeast end of East Park Reservoir north of Lodoga. 365 Comment
  UCSB61646  Bergia texana Ertter, Barbara 1989-10-21 Colusa SE end of East Park Reservoir N of Lodoga 365 Comment
  CHSC42573  Berula erecta Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306. 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  UC1532346  Berula incisa Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Road (M10) at Candy Bucket Spring, 6.0 miles W of Road 306, 0.4 mi E of junction John Smith Road (M5). Comment
  CAS-BOT-BC100260  Blennosperma nanum var. nanum Roxana S. Ferris 1917-4-12 498 Colusa 4 miles East of Williams 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
  SEINET8354595  Bolboschoenus fluviatilis David B. Marshall 1954-7-20 Colusa Colusa National Wildlife Refuge. Comment
  CHSC101402  Bolboschoenus glaucus David Isle 2006-5-16 1573 Colusa From bank of irrigation canal west of Maxwell cardlock gas station (south end of Maxwell just W of Hwy 99W). On east edge of canal at west end of Jack Barrett's 4th rice check (counting from N to S). 30 Comment
  CHSC80474  Bolboschoenus glaucus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  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
  CHSC94729  Bolboschoenus glaucus Lowell Ahart 2006-9-26 13351 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  CAS-BOT-BC28250  Bolboschoenus glaucus V. C. Bryant 1929-8-1 s.n. Colusa Colusa Ricefields. Comment
  UCD18527  Bolboschoenus glaucus June McCaskill; with Mr. Harvey and Loren Davis 1954-8-9 361 Colusa ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. Comment
  CHSC107176  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-5-19 10287 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. In 0-6 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  JEPS80460  Botrychium crenulatum Alice Q. Howard 1972-7-10 2 Colusa mossy spring area crossing trail from Fouts Camp to Box Springs (highest of 2 such areas on n side of ridge separating Trout and Paradise Creeks); Snow Mt. 1676 Comment
  CAS-BOT-BC418408  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  CAS-BOT-BC418409  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  CDA16108  Brickellia californica G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15245 Colusa North Coast Ranges; Along Leesville Rd. 365 Comment
  CHSC94321  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
  IRVC29685  Brickellia grandiflora Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5033 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  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
  CAS-BOT-BC127866  Brickellia greenei Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5034 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. 1989 Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  JEPS81271  Brodiaea elegans subsp. elegans L. R. Heckard and J. C. Hickman 1982-7-5 5879 Colusa slope below (s of) area Summit Springs (s side of Snow Mountain); s side Snow Mountain 1500 Comment
  UC1051716  Brodiaea elegans subsp. elegans Helen K. Sharsmith 1953-6-19 4268 Colusa near confluence of North and Middle Forks of Stoney Creek; Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  UCD72482  Brodiaea elegans subsp. elegans Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3816 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
  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
  UCD57610  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa 10.1 miles southeast of Leesville. Comment
  HSC100292  Bromus diandrus J. P. Smith 2011-4-27 13144 Colusa Along Hwy. 16, 1.3 mi. S of junction with Hwy. 20 315 Comment
  CHSC6680  Bromus hordeaceus Marilyn Lee 1968-4-30 168 Colusa North side of Hwy. 16, intersection of Hwy. 16 and Hwy. 20, between Hwy. and Cache Creek. Comment
  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
  UCD57554  Bromus hordeaceus Cindy Yip; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  POM92520  Bromus hordeaceus Roxana S. Ferris 1917-04 527 Colusa 4 miles east of Williams. Comment
  UCR228650  Bromus japonicus Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4934 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
  UC1055952  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa near confluence of North and Middle forks of Stoney Creek (Red Bridge Camp, Mendocino National Forest); Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  UCD163860  Bromus laevipes Craig D. Thomsen 2001-5-31 2542 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. 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
  CHSC100274  Bromus madritensis subsp. rubens D. Isle 1988-4-13 1515 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  HSC23360  Bromus madritensis subsp. rubens J. D. Dagray 1970-4-4 3 Colusa 10 mi. W of Williams on Hwy. 20 122 Comment
  SEINET3922874  Bromus madritensis subsp. rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction of 5th Street and B Street.; 0 24 Comment
  UCD66445  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-4-28 2214 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
  JEPS80793  Bromus orcuttianus L. R. Heckard and J. C. Hickman 1981-7-30 5763 Colusa se Snow Mountain, going down Trout Creek Trout Creek; Snow Mountain, Trout Creek 1569 Comment
  CHSC94853  Bromus pseudolaevipes Lowell Ahart 2006-6-11 12670 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  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
  CHSC94534  Bromus tectorum 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
  UCD65639  Bromus tectorum Craig D. Thomsen 2000-4-28 2174 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
  UC1563843  Cacaliopsis nardosmia Barbara Ertter 1989-7-1 8595 Colusa road to Goat Mt. Lookout 2.2 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd) (at head of creek, ca 12 airmiles wsw of Stonyford); S Fork Stony Creek 1500 Comment
  CAS-BOT-BC273299  Cacaliopsis nardosmia Volney Rattan 1884-6-1 s.n. Colusa Coast Mts. North of San Francisco Bay 1524 Comment
  JEPS52594  Calandrinia ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  UCD163689  Calandrinia ciliata Craig Thomsen 1999-4-15 1991 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD64251  Calandrinia ciliata Craig D. Thomsen 2000-3-31 2053 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
  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
  UCD100193  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Walker Ridge, along Walker Ridge Rd. nr. Turn-off to Bear Valley on north end; serpentine site. Comment
  UCD82342  Calandrinia ciliata Robin McMaster 1973-4-15 332 Colusa middle of Bear Valley. Comment
  CHSC86517  California macrophylla B. Castro; Beth Hendrickson 2003-3-24 1398 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On and along dirt road. 289 Comment
  UCD57052  California macrophylla Gordon Harrington; Diana Hickson 2007-4-7 0011 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. Comment
  NY465060  Callitriche marginata A. A. Heller 1902-5-2 5440 Colusa Princeton Comment
  UC1101520  Callitriche marginata S. Galen Smith and G. T. Robbins 1950-4-15 1906 Colusa Bear Valley Comment
  JEPS80389  Calocedrus decurrens L. R. Heckard and J. Hickman 1981-6-22 5622 Colusa at edge Veratrum meadow; Snow Mt., Dark Hollow Creek, Big Meadow, Veratrum meadow 1889 Comment
  UCD139472  Calochortus amabilis K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  CAS-BOT-BC492123  Calochortus amabilis A. A. Heller 1940-5-6 15577 Colusa 2 miles west of Junction with Highway #16, on State Highway #20 Comment
  CHSC85971  Calochortus luteus Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  UC1733772  Calochortus luteus Kay H. Beach 1940-5-16 659 Colusa Colusa and Lake county line Comment
  UCD82117  Calochortus luteus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5645 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
  JEPS120967  Calochortus splendens Lowell Ahart 2013-5-1 18683 Colusa On the 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
  UC1562881  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UC616859  Calochortus splendens L. Constance 1939-5-14 2491 Colusa 2.5 mi e Bonnie View (above Middle Fork of Stony Creek, e base of Snow Mountain); Inner North Coast Ranges, Snow Mountain 518 Comment
  UCD139570  Calochortus splendens K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  UC1051690  Calochortus tolmiei Helen K. Sharsmith 1953-6-19 4289 Colusa Old Mill Campground, Trough Springs Ridge Inner North Coast Ranges, Mendocino National Forest 1219 Comment
  CHSC82628  Calochortus uniflorus Tara Morgan 2002-4-1 18 Colusa Found in Bear Valley located west of Highway 5 and north of Highway 20 within pastures. 385 Comment
  HSC45509  Calochortus uniflorus M. Alcasas 1978-4-23 59 Colusa Bear Valley Rd., 4.7 mi. from Bartlett Springs Rd. 457 Comment
  RSA377474  Calochortus uniflorus M. Dalke 1979-4-14 48 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  UCD139597  Calochortus uniflorus Clinton C. Shock 1980-5-3 59 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  UCD82499  Calochortus uniflorus Craig Thomsen; G. Harrington 2009-5-12 2858 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC65993  Calochortus vestae D. Boyd, M. Eichelberger, Tim Messick, Tom Ranker 1980-4-20 46 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  HSC94037  Calycadenia pauciflora G. Fred Hrusa 1998-6-19 14595 Colusa Along Little Stony Creek, on Goat Mtn. Rd., ~0.5 km W of intersection with Lodoga-Stonyford Rd. 400 Comment
  UCR44924  Calycadenia pauciflora L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Road, Mendocino Natl Forest 474 Comment
  CAS-BOT-BC270744  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles E of Walker Ridge Road on Deadshot Road, Deadshot Flat 731 Comment
  CAS-BOT-BC270746  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile E of Lake County line on Bartlett Springs Road Comment
  CAS-BOT-BC270755  Calycadenia pauciflora Alice Eastwood 1919-6-8 13230 Colusa Near Ladoga 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
  UC1876262  Calycadenia pauciflora Gerald D. Carr 1971-7-23 605 Colusa 1.7 mi W of Lodoga on road to Stoneyford. 411 Comment
  UC1971757  Calycadenia pauciflora R. L. Carr 1997-7-18 3352 Colusa E of Clearlake Oaks, 1.8 mi E of Lake/Colusa Co. line on Hwy 20 Comment
  UCD129870  Calycadenia pauciflora R. L. Carr 1978-8-20 2155 Colusa Brim Road (to Bartlett Spring), 1.5 miles west of junction with Bear Valley Road, around 3.6 miles southwest of Leesville. 482 Comment
  UCD129891  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 miles southwest o Leesville on road to Bartlett Springs. Comment
  UCD129895  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles north of Yolo County line Hwy 16. Comment
  UCD68099  Calyptridium monospermum Kathleen A. Robson 1981-5-23 37 Colusa From Stonyford, take Fouts Spring Road 12 miles West, past Fouts Springs to Letts Lake, Mendocino National Forest. 1219 Comment
  IRVC29689  Calyptridium umbellatum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5029 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
  CHSC70485  Calystegia collina R. A. Schlising; T. Spira 1978-5-13 3233 Colusa Just E of Lake County line, along Hwy 20. Comment
  CDA39872  Calystegia collina T. C. Fuller 1958-5-27 3670 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 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
  UCD66710  Calystegia collina subsp. oxyphylla Craig D. Thomsen 2001-5-24 2533 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
  UCD81718  Calystegia occidentalis subsp. occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5723 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  JEPS94220  Camissoniopsis hirtella Vernon Oswald and Lowell Ahart 1998-5-7 9004 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
  UCD37191  Camissoniopsis hirtella Beecher Crampton 1958-5-19 4807 Colusa 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  JEPS120912  Campanula angustiflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD165932  Campanula griffinii Ellen Dean; with Tom Starbuck 2016-4-24 8843 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  UCD66822  Campanula griffinii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Destanella Flat-Walker Ridge. 450 Comment
  JEPS80789  Campanula prenanthoides L. R. Heckard and J. C. Hickman 1981-7-30 5762 Colusa se side Snow Mt.; Trout Creek 1569 Comment
  CAS-BOT-BC37027  Capsella bursa-pastoris Roxana S. Ferris 1917-4-12 519 Colusa 4 miles east of Williams. Alkali Plains. Comment
  UCD56906  Capsella bursa-pastoris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3509 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD64045  Capsella bursa-pastoris Craig D. Thomsen 2000-3-8 2037 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  CHSC87152  Cardamine oligosperma Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  UCD64043  Cardamine oligosperma Craig D. Thomsen 2000-3-8 2033 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
  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
  CHSC79446  Carduus pycnocephalus B. Castro 2000-5-2 1112 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  UCD57706  Carduus pycnocephalus Daniel Chau; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  UCD159527  Carduus pycnocephalus subsp. pycnocephalus D. S. Park 2011-4-6 276 Colusa Off Rt. CA-20. Roadside. Disturbed. Comment
  JEPS80864  Carex bolanderi L. R. Heckard and J. C. Hickman 1981-7-30 5754 Colusa Trout creek, SE side of Snow Mountain 1615 Comment
  CDA15482  Carex feta G. F. Hrusa, T. D. Wilfred 1998-6-19 14619 Colusa North Coast Ranges; Wet area on spring in +- shaded understory of Pinus ponderosa, Abies concolor forest along Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). Short-rhizomatous perennial. Comment
  RSA523879  Carex fracta Barbara Ertter 1989-7-1 8610 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
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 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
  JEPS83819  Carex lenticularis var. impressa L. R. Heckard and J. Hickman 1980-9-16 5461 Colusa cirque area between peaks, ne slope of West Peak, Snow Mt. West Peak; Snow Mt., West Peak 2011 Comment
  CAS-BOT-BC31581  Carex luzulina var. luzulina L. R. Heckard 1972-7-10 3113 Colusa Trout Creek crossing of trail to Box Spring, Snow Mt. 1828 Comment
  JEPS80878  Carex luzulina var. luzulina L. R. Heckard and R. Bacigalupi 1976-9-6 4442 Colusa northeast side of Fouts Camp promonotory, Snow Mt. 1859 Comment
  JEPS80861  Carex pachystachya L. R. Heckard and J. C. Hickman 1981-7-30 5741 Colusa along Trout Creek trail, se side of Snow Mt. Snow Mt., Trout Creek trail 1676 Comment
  UCD163204  Carex praegracilis Craig D. Thomsen 2000-3-31 2069 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
  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
  UCD82442  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5666 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  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
  JEPS80865  Carex subfusca L. R. Heckard and J. C. Hickman 1981-7-30 5771 Colusa along Trout Creek, se side of Snow Mt. Snow Mt., Trout Creek 1600 Comment
  JEPS83817  Carex subfusca L. R. Heckard 1972-7-8 3040 a Colusa on n side of ridge running se West Peak; Snow Mt. 2011 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
  HSC45686  Castilleja applegatei Patricia Shesgreen 1978-4-22 38 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CDA12181  Castilleja applegatei subsp. martinii G. F. Hrusa 1993-5-2 10863 Colusa Frenzel Creek Research Natural Area; Point of ridge above mouth of Frenzel Creek, tributary of Little Stony Creek. S. side of creek. Comment
  HSC72113  Castilleja applegatei subsp. martinii J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9557 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 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
  UCR37517  Castilleja applegatei var. applegatei C. G. Phillips, K. B. Barrows, L. Cole, S. A. Haultain 1984-4-29 Colusa Bear Valley Road, 2 mi north of Hwy. 20 366 Comment
  CAS-BOT-BC257276  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 77 Comment
  CHSC107964  Castilleja attenuata B. Castro; T. Boullion 2011-4-20 1841 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. Off north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in grassy uplands. 49 Comment
  CHSC86031  Castilleja attenuata Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  JEPS124209  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  RSA0011988  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  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
  UC719289  Castilleja attenuata F. G. Meyer 1938-4-5 1348 Colusa about 20 mi n Williams Comment
  CHSC27511  Castilleja exserta Michael F. Henetz 1978-4-15 8 Colusa 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. S central border of Section 36. 332 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
  CHSC115373  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-10 20026 Colusa Normal size plants, on dry grassy soil. 407 Comment
  JEPS10302  Castilleja exserta subsp. exserta W. L. Jepson 1932-5-7 16255 Colusa 1 mi above Venado (sw Colusa County) 274 Comment
  JEPS10303  Castilleja exserta subsp. exserta W. L. Jepson 1932-5-8 16282 Colusa Stonyford 365 Comment
  JEPS124238  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-1 20000 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  JEPS124296  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-10 20026 Colusa About 4 mile south of Lodoga. Comment
  UCR47925  Castilleja exserta subsp. exserta Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 mi north of State Hwy 20 Comment
  HSC65935  Castilleja exserta subsp. exserta C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 45 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  CHSC112412  Castilleja foliolosa Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18642 Colusa Rocky serpentine outcrop 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 west of Williams. 566 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
  CHSC115391  Castilleja foliolosa Lowell Ahart 2015-4-1 19988 Colusa Along small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  CHSC48974  Castilleja foliolosa Vernon Oswald 1983-3-28 224 Colusa About 19.3 mi s 7 e of Stonyford on the Sites-Lodoga Rd. 457 Comment
  JEPS124244  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  JEPS124251  Castilleja foliolosa Lowell Ahart 2015-4-1 19988 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
  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
  JEPS82554  Castilleja miniata L. R. Heckard 1983-7-27 6101 Colusa ca 2 mi w Stonyford road; Little Stony Creek 411 Comment
  CDA11256  Castilleja miniata subsp. miniata G. F. Hrusa 1994-11-7 11991 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. on banks of Frenzel Creek, a tributary 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
  JEPS93868  Castilleja minor subsp. spiralis Vernon H. Oswald and Lowell Ahart 1998-7-15 9271 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UC198199  Castilleja minor subsp. spiralis Katharine Brandegee 1910-8-10 Colusa Epperson's Grade; sw Colusa Co. Comment
  UCD169353  Castilleja rubicundula Lowell Ahart 2013-5-1 18687 Colusa North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD166311  Castilleja rubicundula subsp. lithospermoides Jack Major 1962-4-28 808 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 Comment
  UCD123056  Castilleja rubicundula subsp. lithospermoides Barrie Stanford 1966-4-16 27 Colusa Bear Valley, 5 miles north of Wilbur Springs. Comment
  UC1282150  Castilleja rubicundula subsp. rubicundula Annetta Carter and Louise Kellogg 1953-6-20 3239 Colusa 6 mi n Wilbur Springs Junction (road to Leesville); Inner North Coast Ranges 400 Comment
  UC1745694  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1389 Colusa S end of lake 0.4 mi. N of Lodoga. Comment
  UC584134  Castilleja rubicundula subsp. rubicundula J. Clausen 1935-5-20 1018 Colusa ca 27 mi w Williams (past the Wilbur Springs road, along Bear Creek); Bear Creek Comment
  UC903276  Castilleja rubicundula subsp. rubicundula Ethel Crum 1932-5-7 1458 Colusa Lodoga 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
  UCD63036  Castilleja rubicundula subsp. rubicundula Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4882 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Across Bear Creek from Cowboy Camp. 318 Comment
  UCD82578  Castilleja rubicundula subsp. rubicundula Craig Thomsen 2008-6-12 2768 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
  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
  UCD170130  Caulanthus lasiophyllus Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  CAS-BOT-BC48829  Ceanothus cuneatus Roxana S. Ferris 1926-4-23 6580 Colusa Stonyford Comment
  RSA399079  Ceanothus cuneatus Carolyn Sanford 1977-4-24 352 Colusa Above Barrel Springs Campground. 701 Comment
  HSC47467  Ceanothus integerrimus J. P. Smith, J. O. Sawyer 1978-4-29 9769 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 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
  CAS-BOT-BC83779  Ceanothus jepsonii D. O. Burge; V. Church 2007-12-28 972 b Colusa Mendocino National Forest, roadside on Goat Mountain Road 430 Comment
  HSC90407  Ceanothus jepsonii R. Cook, M. Lewis, L. Sims 1992-4-11 7 Colusa 1.0 mi S of Blue Oak Recreation Site on Walker Ridge Rd. 685 Comment
  UCD110813  Ceanothus jepsonii Christopher Mallek 2008-1 PR1- 2 Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  CHSC105194  Ceanothus jepsonii var. albiflorus B. Castro; L. P. Janeway 1999-7-5 1016 A Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 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
  UCD72391  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5117 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
  UCD81261  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5426 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD66479  Centaurea calcitrapa Craig D. Thomsen 2001-5-6 2556 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. 310 Comment
  CHSC94524  Centaurea melitensis Lowell Ahart 2006-8-9 13169 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94445  Centaurea solstitialis Lowell Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  IRVC29846  Centaurea solstitialis Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4993 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  SEINET251844  Centaurea solstitialis L. Shultz, J. Shultz 1986-9-20 10225 Colusa Ca. 10 miles west of Colusa on Highway 20 Comment
  CDA39705  Centaurium trichanthum Larry Norris 1975-7-2 s.n. Colusa Bear Valley. 0 Comment
  JEPS68349  Centromadia fitchii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2789 Colusa on Ladoga rd about 3 mi s Stonyford 335 Comment
  UCD55450  Centromadia fitchii Ellen Dean; Gordon Harrington 2006-10-6 3275 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  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
  CAS-BOT-BC271546  Centromadia parryi subsp. rudis A. A. Heller 1941-9-22 16331 Colusa Along U.S. Highway #99W between Williams and Maxwell Comment
  CHSC108063  Centromadia parryi subsp. rudis B. Castro; Dave Boegner 2011-9-1 1912 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. Locally common in vicinity along berms and other disturbed areas between rice fields and the NWR. 17 Comment
  JEPS104140  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, ca 1 mi sw of Williams. 27 Comment
  CHSC89831  Centromadia pungens subsp. maritima B. Castro; S. Innecken 2001-3-20 1217 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 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
  CAS-BOT-BC222990  Cephalanthus occidentalis Roxana Stinchfield 1916-7-8 399 Colusa Sycamore Slough, Stinchfield ranch 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
  UCD137756  Ceratophyllum demersum J. S. Jones 1926-7-16 s.n. Colusa Colusa. Comment
  HSC31623  Cercis occidentalis Glenn McGourty 1974-4-20 7 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
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Aug 13 2014
  SFV8462  Cercis occidentalis R. D. Deragisch 1969-4-20 12 Colusa Near Bear Creek Bridge on CA State Highway 16, about 2 miles north of Colusa-Yolo County line. 152 Comment
  UCD83634  Cercocarpus betuloides Fanny Ye; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 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
  CHSC48135  Chaenactis douglasii var. douglasii Vernon Oswald 1984-7-20 1620 Colusa Letts Lake in Mendocino National Forest on top of the dam. 1402 Comment
  UC727669  Chamaesyce nutans Milo S. Baker 1946-9-4 11606 Colusa near locked gate Colusa Gun Club (Butte Sink); Butte Sink Comment
  SBBG28478  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC77561  Chenopodium album Heidi West; Jenny Marr, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Salt Lake and Sites. 97 Comment
  CHSC94513  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA35284  Chenopodium botrys Milo S. Baker 1941-7-26 10135 Colusa Stony Creek at bridge north of Stonyford, ca. 1 mile. Comment
  CHSC114994  Chenopodium californicum Lowell Ahart 2015-4-28 20112 Colusa High bank on the west side of Leesville-Lodoga Road, about 300 yards north of the intersection of Bear Valley Road and Brim Road, Bear Valley, about 2 miles southwest of Leesville, about 14 1/2 miles(air) west of Williams. 395 Comment
  CHSC86515  Chenopodium californicum B. Castro 2003-3-18 1385 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 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
  CHSC32207  Chenopodium hians James Jokerst 1980-8-7 1065 Colusa North Coast Range. Near Snow Mountain. Comment
  JEPS80466  Chimaphila menziesii Alice Q. Howard 1972-7-10 8 Colusa wet mossy spring area crossing trail from Fouts Camp to Box Springs (highest of 2 areas on n. side of ridge separating Trout & Paradise Creeks); Snow Mt. 1676 Comment
  UCD57921  Chloris gayana Beecher Crampton 1958-6-27 4980 Colusa 2.5 miles south of Grimes. Comment
  UCD57927  Chloris gayana Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  UCD37706  Chloris virgata Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  SEINET10745049  Chloropyron palmatum R. Stinchfield 1916-6-17 Stinchfield 284 Colusa In alkaline soil, overflowed lands at Tule near College City Comment
  CHSC86966  Chorizanthe membranacea B. Castro; Michelle Cedarborg 2003-5-6 1430 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. 219 Comment
  CHSC86996  Chorizanthe membranacea B. Castro 2003-5-14 1433 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On west edge of Sacramento Valley. 134 Comment
  HSC45743  Chorizanthe membranacea Stephen Plant 1978-4-22 216 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD159331  Cirsium cymosum D. S. Park 2010-6-5 115 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD66565  Cirsium cymosum Craig D. Thomsen 2001-5-24 2520 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
  CDA1159  Cirsium cymosum T. C. Fuller 1958-6-16 1848 Colusa Hillside above Hwy. 20; 2 mi. W/ Cache Creek Bridge. 0 Comment
  UCD159335  Cirsium douglasii var. breweri D. S. Park; E. Dean 2010-6-5 119 Colusa Walker ridge, Cold Spring Mt. 886 Comment
  UC1299440  Cirsium douglasii var. douglasii Freed W. Hoffman 1947-6-19 1669 Colusa Cooks Springs North Coast Ranges Comment
  CDA15471  Cirsium occidentale var. venustum G. F. Hrusa, WTD 1998-6-19 14608 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  UCD81256  Cirsium vulgare Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5421 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
  UCD57861  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 46 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
  CHSC86125  Clarkia affinis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UCD57561  Clarkia affinis Stephanie Castle; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, on small rise south of Craig Creek. 304 Comment
  CAS-BOT-BC164146  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  UCD82739  Clarkia gracilis Craig Thomsen; G. Harrington 2009-5-14 2920 Colusa Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 822 Comment
  UC1212149  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa about 1/4 mi e Cooks Spring (near Cooks Creek); Inner North Coast Ranges Comment
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Nov 19 2007
  CHSC88596  Clarkia gracilis subsp. tracyi L. P. Janeway 2001-6-6 7114 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  UCD63104  Clarkia gracilis subsp. tracyi Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4935 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  UC903259  Clarkia modesta Ethel Crum 1932-5-7 1462 Colusa Lodoga Inner North Coast Ranges Comment
  UCR261732  Clarkia modesta Ann Howald 2003-5-30 2359 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Hole-in-the-Wall camping area 370 Comment
  UCR138658  Clarkia purpurea A. Burgard, J. Goldsmith, J. Kalt 1996-5-4 72 Colusa 8.4 mi north of Indian Reservoir Road on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  JEPS43724  Clarkia purpurea subsp. purpurea Alice King 1906-1-1 Colusa College City Comment
  JEPS81296  Clarkia purpurea subsp. quadrivulnera L. R. Heckard and J. C. Hickman 1982-7-5 5910 Colusa slope below Summit Springs (s side of snow Mt.); Snow Mt. 1524 Comment
  UCR212340  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2201 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  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
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  SBBG122897  Clarkia rhomboidea B. Ertter 1989-7-1 8597 Colusa rd to Goat Mtn lookout, 2.2 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1500 Comment
  CHSC91163  Clarkia unguiculata D. Isle 1995-6-7 1063 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Bear Valley Rd. 2.6 miles NW of Hwy. 20/Hwy. 16 junction + 1.4 miles SE of Wilbur Springs Junction. N. edge of Bear Valley Rd. Comment
  UCD100591  Claytonia exigua K. Esau 1934-5-6 s.n. Colusa West of Williams, Tahoe-Ukiah Highway. Comment
  SEINET8214253  Claytonia exigua K. L. Chambers 1995-4-21 5855 Colusa Hwy. 20 east of Clear Lake, 1.0 mi. W of junction with Hwy. 16. Comment
  CHSC101595  Claytonia exigua subsp. exigua David W. Isle 2002-4-18 1655 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trail (Snow Mtn). N aspect of E drainage; MDB and M. 524 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
  UC1745699  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1388 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  CHSC112263  Claytonia exigua subsp. glauca Lowell Ahart 2013-5-1 18677 Colusa Inner North Coast Range. On the south side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  SBBG128770  Claytonia exigua subsp. glauca L. Ahart 2013-5-1 18677 Colusa S side of wash, N side of State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  CHSC72459  Claytonia gypsophiloides L. P. Janeway; David Isle 1998-7-3 5709 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
  UC1745697  Claytonia gypsophiloides Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1380 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  CHSC86523  Claytonia parviflora subsp. parviflora B. Castro; Beth Hendrickson 2003-3-19 1392 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  HSC45739  Claytonia parviflora subsp. parviflora Sheila Logan 1978-4-22 55 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS87662  Claytonia parviflora subsp. parviflora Vernon H. Oswald and Lowell Ahart 1994-4-6 6055 Colusa Goat Mtn Rd 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  RSA590192  Claytonia parviflora subsp. parviflora Michael A. Vincent, Robert M. Rhode 1996-3-30 7285 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct. Wilbur Springs Rd. Comment
  UC638662  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2021 Colusa 3 mi n Leesville; Inner North Coast Ranges Comment
  RSA755471  Claytonia parviflora subsp. parviflora David W. Isle 2002-4-18 1654 Colusa North of Fouts Springs, North of Chlorinator Building and Road to Bathhouse Trail (Snow Mountain). North aspect of east drainage. 524 Comment
  UC1051503  Claytonia parviflora subsp. parviflora Helen K. Sharsmith 1953-6-19 4285 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  JEPS80200  Claytonia perfoliata subsp. perfoliata L. R. Heckard and J. Hickman 1980-7-3 5355 Colusa ca 10 mi w Stonyford (just w of Summit Springs); Snow Mt. 1548 Comment
  JEPS15557  Claytonia saxosa G. Thomas Robbins with L. R. Heckard 1956-7-25 3724 Colusa 0.25 mi s Snow Mt. West summit (on ridge forming s extension of Snow Mt. West, Lake-Colusa County boundary); Snow Mt. West 2103 Comment
  UCD146599  Claytonia saxosa G. F. Hrusa 1998-6-19 14622 Colusa North Coast Ranges. Summit of Goat Mountain. 1740 Comment
  CAS-BOT-BC92547  Clematis ligusticifolia Roxana Stinchfield 1916-7-5 388 Colusa Banks of Sycamore Slough. Stinchfield Ranch. Comment
  CHSC91564  Clematis ligusticifolia D. Isle 1995-7-12 395 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. On BLM land S of Cook Springs. 548 Comment
  JEPS108908  Clematis ligusticifolia Lowell Ahart 2006-8-9 13094 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC25053  Collinsia grandiflora G. N. Steger 1972-4-10 Colusa Along road cuts of Hwy. 20, s of Lucerne along the shore of Clear Lake. Comment
  CHSC39775  Collinsia grandiflora Brian H. McMurtry 1979-3-31 1 Colusa Ca. 0.3 m w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 m sw of Williams. 321 Comment
  CHSC55589  Collinsia grandiflora Jennie J. Dubose 1991-4-6 20 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC57516  Collinsia grandiflora Lance E. Neuman 1987-4-4 5 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
  UCD66690  Collinsia greenei Craig D. Thomsen 2000-5-11 2321 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
  UCD81721  Collinsia greenei Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5725 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
  CHSC1731  Collinsia heterophylla V. Holt 1946-4-18 Colusa Cashe Creek. Comment
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Mar 2 2015
  CHSC9540  Collinsia heterophylla L. V. Ritter 1969-4-30 222 Colusa Ca. 10 mi sw of Williams, s side of Hwy 20. 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
  UCD56670  Collinsia sparsiflora Jack Alderson 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. 559 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
  POM253019  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa On Highway #20, 15 miles west of Williams. Comment
  UC1049530  Collinsia sparsiflora var. collina Rimo Bacigalupi 1950-4-16 3114 Colusa 4 mi s Ladoga (and 6 mi nnw of Leesville, along Little Indian Creek); Indian Valley, Little Indian Creek 396 Comment
  JEPS17960  Collinsia sparsiflora var. sparsiflora George B. Rossbach 1955-4-9 491 Colusa w edge Colusa Co., Rt 20 w edge Colusa Co. 563 Comment
  JEPS80164  Collinsia torreyi var. wrightii L. R. Heckard with J. Hickman 1980-7-2 5315 Colusa ca 10 mi w Stonyford (trail from Frog Pond to Milk Ranch, w of West Peak, Snow Mt.); Snow Mt. 1950 Comment
  CDA14918  Collomia diversifolia G. F. Hrusa 1993-5-2 10854 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Comment
  CHSC48647  Collomia diversifolia Vernon Oswald 1986-5-12 2011 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. On a roadcut. 487 Comment
  JEPS94201  Collomia diversifolia Vernon Oswald and Lowell Ahart 1998-5-7 9006 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
  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
  JEPS80144  Collomia tinctoria L. R. Heckard with J. Hickman 1980-7-2 5305 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary) 1706 Comment
  CHSC67606  Cordylanthus palmatus James D. Jokerst 1988-8-23 3036 Colusa Delevan National Wildlife Refuge S of Willows, in Cell 12. Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  UC1561032  Cordylanthus palmatus Dean W. Taylor 1988-8-8 10024 Colusa far se corner of Colusa National Wildlife Refuge (along Ohm Rd, 1 mi n of Ware Rd.) 22 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
  JEPS14919  Cordylanthus pringlei Rimo Bacigalupi with G. T. Robbins, L. T. Dempster, and L. R. Heckard 1956-7-26 5748 Colusa 1/2 mi above Fir-Root Spring Public Camp (at summit of ridge forming Colusa-Lake Co. line, on Colusa side, e of head of Long Ridge, region about 7 mi s of Snow Mountain) 1402 Comment
  UCD63123  Cordylanthus tenuis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4953 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  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
  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
  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
  CDA36236  Cotula coronopifolia G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14381 Colusa Sacramento Valley; Along CA Hwy. 20, 0.1 mile east of its junction with I-5, north end of Williams. Comment
  CHSC107965  Cotula coronopifolia B. Castro; L. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; aproximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 Comment
  JEPS22121  Cotula coronopifolia R. Snow 1958-4-13 419 Colusa 2 mi west of Williams Comment
  UCD159525  Cotula coronopifolia D. S. Park 2011-4-6 274 Colusa On side of Putnam Rd. Along ditch/small creek. Growing in abundance. Flooded. 24 Comment
  SEINET8194448  Crassula connata R. R. Halse 2010-3-20 7827 Colusa Williams, junction of 5th Street and B Street 25 Comment
  UC1221796  Crepis intermedia Beecher Crampton 1958-5-19 4803 Colusa 5.5 mi s Lodega 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
  CHSC29713  Cressa truxillensis K. R. Stern 1980-6-30 6649 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  POM66160  Cressa truxillensis Roxana Stinchfield 1916-7-11 143 Colusa Willaims Road at theTrough Comment
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCR205144  Croton setiger George K. Helmkamp, E. A. Helmkamp 2008-10-14 14249 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  CAS-BOT-BC190085  Crypsis schoenoides Milo S. Baker 1946-9-4 11621 Colusa Butte Sink near locked Gate of Colusa Gun Club. Comment
  CHSC52702  Crypsis schoenoides James Jokerst 1985-4-24 2494 Colusa Near Lurline Creek. 41 Comment
  CHSC80307  Crypsis schoenoides B. Castro; G. Kuenster 2000-7-19 1205 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal. 48 Comment
  RSA256295  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1973-5-28 6195 Colusa ca. 3 miles S of Colusa along Hwy. 45. Comment
  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
  SEINET12765117  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford.; 0 347 Comment
  CAS-BOT-BC190165  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa Butte Lodge Outing Club, three miles above Colusa. Near Butte Creek. Comment
  POM198510  Crypsis vaginiflora Roxana Stinchfield 1916-7-11 466 Colusa Davis Tule, near Sycamore Slough. 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
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UCD59987  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa North Coast Ranges. Bear Creek at junction of Sulphur Creek near Sulphur Springs. 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
  OBI20715  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  SBBG40520  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Crk cyn N of Hwy 20 (near Wilbur Springs) Comment
  UC79296 Image available Cryptantha excavata Katharine Brandegee Colusa Stites [Sites], Colusa Co. 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
  UC1613300  Cryptantha flaccida Charles M. Belshaw April 1937 2881 Colusa vicinity of Cook's Spring (Inner North Coast Ranges, Devil's Ridge); Inner North Coast Ranges, Devil's Ridge Comment
  SEINET7881830 Image available Cryptantha hendersonii Helen K. Sharsmith 1953-1 4278 Colusa One mile north of Trough Springs on Trough Springs Ridge; Mendocino National Forest 914 Comment
  HSC3611  Cryptantha hispidula Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  UC857088  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa county on road to Williams Comment
  UCD66686  Cryptantha hispidula Craig D. Thomsen 2000-5-11 2313 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
  SEINET7883435 Image available Cryptantha hispidula Leo Koch 1940-1 936 a Colusa Serpentine hill near Lake and Colusa county line along Highway 20, Williams Highway Comment
  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
  UC971695  Cryptantha intermedia Leo Koch 1940-4-29 936 b Colusa near Lake and Colusa County (along Highway 20; Williams Highway) Comment
  RSA114163  Cryptantha intermedia H. K. Sharsmith 1953-6-19 4278 Colusa One mile north of Trough Springs on Trough Springs Ridge. Mendocino National Forest 915 Comment
  SBBG29133  Cryptantha intermedia L. Constance 1939-5-14 2489 Colusa 0.5 mi E of Mill Crk Ranger Station 548 Comment
  UC1177888  Cryptantha intermedia Peter M. Ray 1950-4-15 1713 Colusa road 3 mi e Stony Creek Bridge (s side of canyon of Big Stony Creek); Big Stony Creek Comment
  HSC3610  Cryptantha intermedia var. hendersonii Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  SDSU20614  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-4-13 1520 Colusa Bear Valley, on north side of Bear Valley Road, 5.75 miles south of Brim Road junction, on shallow, barren, eroding slopes. 387 Comment
  CHSC79477  Cryptantha microstachys B. Castro; L. P. Janeway 2000-5-4 1142 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC638663  Cryptantha microstachys Ethel Crum 1938-5-7 2019 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UC726039  Cryptantha microstachys A. A. Heller 1940-6-7 15713 Colusa ridge e of Lodogo (just above the road leading to Sites) Comment
  UC1051698  Cryptantha milobakeri Helen K. Sharsmith 1953-6-19 4279 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  UC1212061  Cryptantha muricata C. R. Bell 1950-4-26 770 Colusa w of Leesville (on road to Bartlett Springs, halfway up e side of county-line ridge) Comment
  UC1731395  Cryptantha muricata Dean W. Taylor 1998-6-16 16662 Colusa Sulphur Creek canyon 0.5 mi below (e) Wilbur Springs (n-facing shale slide); North Coast Ranges, Walker Ridge and vicinity 381 Comment
  UCD84450  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6058 Colusa Walker Ridge. Along Walker Ridge Rd, E side of road in turnout. Just past Pinus attenuata groves. 981 Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  UC78654  Cryptantha rostellata Katharine Curran May 1884 Colusa Leesville Comment
  JEPS13746  Cupressus macnabiana Frank W. Gould 1939-4-8 631 Colusa 1.5 mi w of Colusa County line (on road to Lucerne) Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  RSA388860  Cupressus macnabiana Linda Bell 1975-4-20 63 Colusa Walker Ridge Road ca. 7 miles from the junction with State Highway 20 Comment
  CAS-BOT-BC80805  Cupressus sargentii C. Hart Merriam 1907-7-23 s.n. Colusa [Cook] Cooks Springs Comment
  JEPS87788  Cupressus sargentii Vernon H. Oswald and Lowell Ahart 1994-3-23 6010 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  NY16797  Cupressus sargentii C. B. Wolf 1934-10-15 6189 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  CHSC115439  Cuscuta K. R. Stern 1980-5-5 6632 Colusa South central border area of Colusa National Wildlife Refuge. 45 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
  UCD67007  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2740 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  SEINET3157202  Cycladenia humilis T. S. Brandegee 1890-6-23 sn Colusa Snow Mountain Comment
  CHSC46872  Cycloloma atriplicifolium Vernon Oswald 1989-9-12 4009 Colusa Goat Mtn Rd 2.1 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. On the n side of Little Stony Creek. 411 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
  UCD72464  Cynodon dactylon Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3798 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  CAS-BOT-BC433233  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UC1100564  Cyperus acuminatus Herbert L. Mason and Verne Grant 1946-8-6 12969 Colusa pond 2.7 mi. n. Colusa (between Sacramento R. and Butte Creek); Butte Sink Comment
  CAS-BOT-BC114780  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles N of Colusa between Sacramento River and Butte Creek. Comment
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. Comment
  UCD141000  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  CAS-BOT-BC114731  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
  SEINET7581552 Image available 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
  UC1100541  Cyperus difformis Malcolm A. Nobs and S. Galen Smith 1949-9-9 1877 Colusa 3 mi. w. Williams Comment
  UCD141006  Cyperus difformis V. C. Bryant 1931-6-24 2205 Colusa Colusa. Comment
  CDA38928  Cyperus difformis J. T. Howell 1944-7-18 19838 Colusa 3 miles west of Williams. Comment
  UCD141008  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 miles west of Williams. Comment
  UCD141021  Cyperus difformis June McCaskill 1954-8-23 372 Colusa 7 miles east of Arbuckle, jus north of the road east from Arbuckle. Comment
  CAS-BOT-BC114573  Cyperus eragrostis Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-9 419 Colusa On Phillips ranch, near Sycamore. Comment
  SEINET9753686 Image available Cyperus eragrostis Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  CHSC115629  Cyperus eragrostis David Isle; Rhonda Isle 2014-9-27 2141 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
  CAS-BOT-BC114386  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
  CHSC112621  Cyperus erythrorhizos Lowell Ahart 2013-10-1 19078 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
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS64102  Cyperus erythrorhizos W. L. Jepson 1929-10-1 15342 Colusa Maxwell 25 Comment
  UC698542  Cyperus erythrorhizos P. B. Kennedy 1925-9-8 Colusa Cortena 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
  CAS-BOT-BC114384  Cyperus erythrorhizos Roxania Strichfield 1916-7-9 419 Colusa Overflow land in Oak grove along Sacramento River. Philips Ranch near Sycamore. Comment
  POM313098  Cyperus odoratus H. L. Mason 1945-9-19 12721 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  JEPS73451  Cystopteris fragilis L. R. Heckard 1972-7-8 3048 Colusa n side ridge running se of Snow Mt (West Peak) 2011 Comment
  RSA714647  Dactylis glomerata Daisie Huang 2006-4-15 6041502 Colusa Maxwell rest stop on I-5. 25 Comment
  POM208489  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Sacramento Valley. Comment
  JEPS80385  Danthonia unispicata L. R. Heckard and J. Hickman 1981-6-22 5618 Colusa Dark Hollow Creek Snow Mt. (meadow) 1889 Comment
  CHSC75705  Datisca glomerata Vernon H. Oswald; Lowell Ahart 1999-6-22 9787 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  JEPS120797  Datura stramonium var. tatula Lowell Ahart 2013-10-1 19083 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  JEPS120992  Daucus pusillus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  UCD38811  Daucus pusillus Beecher Crampton 1958-5-19 4797 Colusa 10.1 miles southeast of Leesville. Comment
  POM174571  Daucus pusillus Roxana S. Ferris 1926-4-23 6587 Colusa 2 miles from Stony Ford. Comment
  JEPS80869  Delphinium antoninum L. R. Heckard 1972-7-8 3051 Colusa n side of ridge running se Snow Mt.; West Peak 2011 Comment
  JEPS81344  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  JEPS81345  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  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
  JEPS81406  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-9 6013 Colusa about 100 m w lookout (Colusa-Lake Co. boundary); Goat Mt 1859 Comment
  UC424843  Delphinium antoninum unknown 1929-7-1 3509 b Colusa between peaks Snow Mt. 2133 Comment
  UCD57667  Delphinium hesperium Erica A. Smith; 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/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  CAS-BOT-BC10226  Delphinium hesperium Clinton Hart Merriam s.n. Colusa Indian Rancheria, Stony Ford Comment
  CAS-BOT-BC238187  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley Comment
  CDA15469  Delphinium hesperium subsp. pallescens G. F. Hrusa, T. D. Wilfred 1998-6-19 14606 Colusa North Coast Ranges; Scattered perennial on steep slope within chaparral above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Flowers blue, other plants nearby range to light blue and pinkish. Crown attachment firm. Comment
  CHSC61697  Delphinium hesperium subsp. pallescens Marjorie McBride 1986-4-5 11 Colusa Hwy 20, 3 mi e of jct with Hwy 16. Top of slope, s side of road. 243 Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  UC726271  Delphinium hesperium subsp. pallescens A. A. Heller 1940-5-6 15574 Colusa roadside bank on State Hwy #20 about 3 mi e junction with Highway #16 (<later note places locality along road from Williams to Upper Lake...a spot 3 mi e of <junction> actually is n...) Comment
  UCD163308  Delphinium hesperium subsp. pallescens Craig D. Thomsen 1997-4-20 1911 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD64429  Delphinium hesperium subsp. pallescens Craig D. Thomsen 2000-4-28 2208 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
  POM149761  Delphinium patens Roxana S. Ferris 1917-4-14 550 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC116431  Delphinium patens subsp. patens Roxana S. Ferris 1926-4-23 6446 Colusa Grapevine Grade near top between Stonyford and Sites Comment
  CAS-BOT-BC17044  Delphinium recurvatum Mrs. H. C. Cantelow 1936-4-11 1208 Colusa Bear Creek Canyon. Comment
  SEINET946331  Delphinium variegatum June McCaskill 1962-1 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff Comment
  UCD96738  Delphinium variegatum Clinton C. Shock 1980-5-3 65 Colusa Bear Valley, west side, ca 12 miles north of State Highway 20. 384 Comment
  HSC95711  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa 9.8 mi. N of Hwy. 20 on Bear Valley Rd., 0.5 mi. into field on E side of rd. Comment
  RSA158040  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Colusa County: road along Beaar Creek from Hwy 20 N to Leesville, 3.6 miles N of Wilbur Springs turnoff Comment
  CHSC89827  Delphinium variegatum subsp. variegatum B. Castro; L. Janeway 2001-5-2 1244 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak woodland. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  HSC87075  Delphinium variegatum subsp. variegatum L. Blackford, S. Branch, D. Malm 1988-4-17 77 Colusa 1.3 mi. S of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. Comment
  CAS-BOT-BC16956  Delphinium variegatum subsp. variegatum Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley 304 Comment
  HSC96712  Delphinium variegatum subsp. variegatum Kay Izlar 2001-4-21 5 Colusa Bear Valley Rd. off Hwy. 20 415 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
  POM270792  Delphinium variegatum subsp. variegatum Lyman Benson 1935-3-27 6330 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  UCD61143  Deschampsia cespitosa Freed W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys. Comment
  JEPS82284  Deschampsia cespitosa subsp. cespitosa Roger Raiche 1982-3-20 20245 Colusa Walker Ridge Comment
  CAS-BOT-BC192668  Deschampsia danthonioides Doris K. Kildale 1928-5-8 5019 Colusa 3 miles south of Arbuckle Comment
  CAS-BOT-BC192669  Deschampsia danthonioides L. R. Abrams 1928-5-8 12591 Colusa 2 miles south of Arbuckle Comment
  CAS-BOT-BC192672  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  JEPS80182  Deschampsia danthonioides L. R. Heckard with J. Hickman 1980-7-3 5334 Colusa ca. 10 mi. w. Stonyford (just w. of Summit Springs, s.w. Snow Mt.); Colusa-Lake Co. Boundary 1548 Comment
  JEPS75750  Deschampsia elongata L. R. Heckard and R. Bacigalupi 1976-9-6 4430 Colusa along trail from Summit Springs to Fouts Camp (Snow Mt.); Lake-Colusa Co. Line, Snow Mt. 1798 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
  CHSC111331  Dicentra chrysantha David Isle; Rhonda Isle 2013-5-19 2040 Colusa 0.1 mi W of Maxwell Grade Summit; burned NW asp. S of Sites Lodoga Road. Alluvial terrace of eph. drainage; Sites Fire Area GPS (NFAD 27) 10S 0546355E 4355688N. 548 Comment
  UC1053476  Dicentra chrysantha Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3179 Colusa just w Bear Valley (slope just w of base of grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  CAS-BOT-BC500073  Dichelostemma capitatum Roxana S. Ferris 1917-4-14 600 Colusa 5 mi west of Arbuckle Comment
  HSC31718  Dichelostemma capitatum subsp. capitatum Teresa Prendusi 1974-5-4 50 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC47745  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1978-4-29 3950 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  HSC72112  Dichelostemma capitatum subsp. capitatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9532 Colusa Bear Valley Rd, 3 mi. from its junction with SR 20 366 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
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 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
  CAS-BOT-BC503139  Dichelostemma volubile David D. Keck 1933-5-30 2400 Colusa 1 mile east of Lake County line, west of Wilbur Springs, on south slope. Comment
  SEINET3885768  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road, 3 miles southeast of Leesville; just below the summit of the pass on the east side.; 0 480 Comment
  JEPS110360  Digitaria sanguinalis Lowell Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  LA8596  Digitaria sanguinalis H. S. Yates; 1936-8-14 6138 Colusa 3 mi. S of Grimes 15 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
  CAS-BOT-BC152170  Diplacus bolanderi V. Rattan 1884-6-1 s.n. Colusa Unspecified Comment
  SEINET199008  Diplacus layneae Helen K. Sharsmith 1953-1 4290 Colusa Mendocino Nat For; In metamorphic rubble of forest clearing, 5 mi beyond Trough Springs on rd to Goat Mt. 1280 Comment
  CHSC60689  Diplacus tricolor Vernon H. Oswald 1993-4-14 5263 Colusa N. side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  UCD64170  Distichlis spicata Beecher Crampton 1958-6-27 4979 Colusa 2.5 miles south of Grimes. Comment
  UCD64555  Distichlis spicata A. A. Beetle 1942-5-21 3270 Colusa 12 miles north of Williams. Comment
  UCD64213  Distichlis spicata var. stricta Beetle 1946-6-27 4685 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  UCD64348  Distichlis spicata var. stricta K. Esau 1932-6-29 Colusa Sutter Basin, near Colusa. 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
  HSC83326  Dodecatheon hendersonii Harold Grams 1975-4-12 10 Colusa Hwy. 16, 12.4 mi. N of Rumsey Comment
  CHSC48008  Downingia elegans Vernon Oswald 1984-7-20 1616 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. 1280 Comment
  CHSC79145  Downingia insignis B. Crampton 1953-4-29 1145 Colusa Along the road, about 3 miles east of Maxwell. Comment
  JEPS33725  Downingia pulchella D. E. Breedlove 1963-5-30 5191 Colusa 5 mi w Leesville Comment
  UC70438  Drosera rotundifolia Milo S. Baker 1898-8-22 555 Colusa Bear Valley Mts.; along stream Comment
  UCD81243  Drymocallis glandulosa Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5407 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  HSC45678  Dudleya cymosa Stephen Plant 1978-4-22 203 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC113133  Dysphania ambrosioides Lowell Ahart 2013-10-1 19088 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-BC197058  Echinochloa crus-galli Milo S. Baker 1944-7-18 10871 Colusa A few mi. W. of Williams along Highway to Lake Co. Comment
  CAS-BOT-BC242662  Echinochloa crus-galli Beecher Crampton 1963-9-9 6890 Colusa 1/4 mile east of Cortena Comment
  RSA725019  Echinochloa crus-galli L. 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
  SACT001042  Echinochloa crus-galli Malcolm Nobs, S. Smith 1949-9-9 Colusa Rice fields, 3 miles west of Williams. Comment
  UCD32929  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 a Colusa Colusa County, 4.5 miles south of Grimes. Comment
  JEPS47814  Echinochloa crus-pavonis W. L. Jepson 1929-10-1 15345 Colusa Maxwell Comment
  UCD61167  Echinochloa oryzicola P. B. Kennedy 1925-9-18 Colusa Rice Station, Cortena. Comment
  UCD61179  Echinochloa oryzoides Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  CAS-BOT-BC445568  Echinodorus berteroi Roxana Stinchfield 1916-7-11 436 Colusa Davis Tule near Sycamore Slough 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
  UC1562615  Echinodorus berteroi Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8879 Colusa n.w. side East Park reservoir (near end of East Park Rd. from Stonyford) 365 Comment
  CAS-BOT-BC445569  Echinodorus berteroi Gordon H. True 1974-11-15 7840 Colusa On Delevan Road just west of Four Mile Road, 4 mi. east of Delevan 27 Comment
  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
  UCD131244  Eclipta prostrata H. L. Mason 1945-9-19 12725 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  HSC41911  Ehrendorferia chrysantha M. A. Baker 1977-4-24 224 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  HSC60471  Ehrendorferia chrysantha J. P. Smith 1977-4-24 9038 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD170084  Ehrendorferia chrysantha Jack Alderson 2016-5-14 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5500 feet (1675 m) south of the intersection of Highway 20 and the Colusa County line. 499 Comment
  UC1245141  Elatine ambigua June McCaskill 1954-8-9 357 Colusa ca 2 mi e Princeton (300 yards s of Glenn Co. line) Comment
  SEINET893014  Elatine ambigua June McCaskill 1954-1 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line Comment
  UC1100591  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa rice fields 3 mi W of Williams Comment
  UCD49598  Eleocharis engelmannii John M. Tucker 1953-8-28 2676 Colusa In rice field; 7 miles east of Arbuckle, Colusa County, California. Comment
  CHSC79049  Eleocharis macrostachya J. Marr; C. Warren, H. West 1998-7-1 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek, in vernal pool in narrow valley bottom west of ridge. 106 Comment
  UCD57290  Eleocharis macrostachya Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3661 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
  JEPS80393  Elymus L. R. Heckard and J. Hickman 1981-6-22 5626 Colusa below (s of) Dark Hollow Trail; Snow Mt. 1981 Comment
  UCD61526  Elymus elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 548 Comment
  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
  UC1055953  Elymus elymoides subsp. elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Red Bridge Camp Inner North Coast Ranges, Mendocino National Forest (near confluence of North and Middle Forks of Stoney Creek) 548 Comment
  CHSC100289  Elymus glaucus D. Isle 1988-4-13 1514 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  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
  CHSC94527  Elymus glaucus subsp. glaucus Lowell Ahart 2006-8-9 13136 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75758  Elymus glaucus subsp. glaucus L. R. Heckard and R. Bacigalupi 1976-9-6 4441 Colusa just e Fouts Camp; Snow Mtn. 1859 Comment
  UCR206350  Elymus glaucus var. glaucus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14743 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  CAS-BOT-BC228537  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville Comment
  UCD62453  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville. Comment
  UCD67001  Elymus multisetus Craig D. Thomsen 2008-5-23 2738 Colusa BLM Payne Ranch. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  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
  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
  CDA40328  Emmenanthe penduliflora D. Brown 1974-8-8 s.n. Colusa Mendocino National Forest, Stonyford. 0 Comment
  SEINET8731329 Image available Emmenanthe penduliflora Helen K. Sharsmith 1953-1 4406 Colusa Among Adenostoma chaparral, edge of road, Trough Springs Ridge, Mendocino National Forest 610 Comment
  UCD63620  Emmenanthe penduliflora Craig D. Thomsen 2000-6-12 2370 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Between Cache Creek Ridge and Brophy Canyon, about 5 miles south of Hwy 20 and 1.5 miles west of Hwy 16. 321 Comment
  JEPS110405  Epilobium brachycarpum Lowell Ahart 2006-8-22 13218 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  UCD105289  Epilobium brachycarpum C. F. Dunshee 1922-7-28 22 Colusa Cortina. Comment
  UCD66863  Epilobium campestre Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5066 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
  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
  JEPS75865  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-10 3883 Colusa base of rocky cliff along spur running se from west peak; Snow Mt., East Circle Trail 2011 Comment
  JEPS80785  Epilobium ciliatum subsp. ciliatum L. R. Heckard and J. C. Hickman 1981-7-30 5758 Colusa se side of mt. Snow Mt., Trout Creek 1600 Comment
  JEPS75845  Epilobium ciliatum subsp. glandulosum L. R. Heckard 1974-9-10 3912 Colusa seep-stream area on ne slope of peak Snow Mt.. West Peak 2011 Comment
  RSA724966  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
Read comments
Aug 9 2017
  JEPS120710  Epilobium densiflorum Lowell Ahart 2013-10-1 19102 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
  JEPS120978  Epilobium minutum Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18649 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
  POM256523  Epilobium minutum E. K. Crum 1938-5-8 2026 Colusa 3 miles north of Leesville. Comment
  JEPS74982  Epilobium nivium L. R. Heckard 1974-9-11 3955 Colusa w parking area near Summit Springs (sw slope of mt.); Snow Mt. 1706 Comment
  UCSB4278  Epilobium torreyi Keator, Glenn 1958-6-17 Colusa Not far from Bartlett Springs in the foothills Comment
  CHSC106240  Epipactis gigantea B. Castro; L. P. Janeway 2001-6-3 1257 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. At upper edges of meadow. 880 Comment
  CAS-BOT-BC58046  Equisetum Roxana Stinchfield 1916-7-11 430 Colusa Sycamore Slough Road. Comment
  CHSC94512  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110233  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CAS-BOT-BC213552  Eragrostis hypnoides Roxana Stinchfield 1916-7-8 383 Colusa In bed of Sycamore Slough. Comment
  SD262162  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Sacramento Valley Foothills: west side East Park Reservoir, 0.3 mile south of boatlaunch. Drying lake bed, c 100 yds east of normal lake edge. 49 Comment
  UCD63437  Eragrostis minor Tom Aldrich 1968-5-28 Colusa College City area. Comment
  JEPS110406  Eragrostis pectinacea var. pectinacea Lowell Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR261669  Eriastrum abramsii Ann Howald 2003-5-29 2343 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
Read comments
Dec 15 2016
  UCD82570  Eriastrum tracyi Tom Zavortink; Gordon Harrington 2009-5-25 s. n. Colusa East side and downslopte of Walker Ridge Road just NE of Til Jones Spring. 779 Comment
  CHSC35579  Ericameria linearifolia J. P. Smith; Tom Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge road, 3.2 miles from its junction with State Route 20. 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
  RSA589927  Ericameria linearifolia Michael A. Vincent, Robert Rhode 1996-3-30 7310 Colusa Along Walker Ridge Road, 11.5 miles S of junction with Brim Road Comment
  SEINET4208167  Ericameria linearifolia Richard R. Halse 2013-3-26 8742 Colusa Along the Leesville-Logoda Road ca. 5.5 miles south of Logoda, or 3.2 miles north of the junction of the Leesville and Bear Valley Roads; Indian Valley.; 0 426 Comment
  UCR80265  Ericameria linearifolia J. P. Smith, Thomas Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 mi. from its junction with State Route 20. Comment
  UCD131766  Erigeron canadensis P. B. Kennedy 30-31 May 1922 s.n. Colusa near Cortina. Comment
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  CHSC92605  Erigeron inornatus var. inornatus D. Isle 2005-8-2 1159 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. West end of Board Camp Ridge. 1554 Comment
  CAS-BOT-BC216004  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony Creek 2.5 miles east of Bonnie View, Inner North Coast Ranges 518 Comment
  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
  RSA23083  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
  UC624291  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa 2.5 mi e of Bonnie View (above Middle Fork of Stony Creek, Inner North Coast Ranges); Inner North Coast Ranges 518 Comment
  CDA15553  Eriogonum dasyanthemum G. F. Hrusa 1998-10-28 14904 Colusa North Coast Ranges; Summit of Walker Ridge. Comment
  HSC94132  Eriogonum dasyanthemum G. Fred Hrusa 1998-10-28 14904 Colusa Along summit of Walker Ridge 900 Comment
  POM279914  Eriogonum dasyanthemum Lyman Benson 1933-6-26 4489 Colusa Abbott mine. 549 Comment
  UCD163236  Eriogonum dasyanthemum Craig D. Thomsen 2000-6-7 2362 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD63122  Eriogonum dasyanthemum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4952 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  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
  UCD82736  Eriogonum dasyanthemum Craig Thomsen; G. Harrington 2009-5-14 2917 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  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
  UCR263625  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  JEPS57028  Eriogonum dasyanthemum W. L. Jepson 1934-7-28 16749 Colusa hills se of Cortina Valley Comment
  CAS-BOT-BC270977  Eriogonum nervulosum Roger Raiche 1985-7-27 50667 Colusa W of Lodoga, Goat Mt. Rd. area, headwaters of Frenzel Creek 707 Comment
  JEPS80338  Eriogonum nervulosum L. Heckard 1982-7-6 5951 Colusa West Peak ridge, Snow Mt. Snow Mt. 2103 Comment
  CDA15552  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa North Coast Ranges; Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 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
  CDA1339  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa 1/3 mi S of Goat Mountain Lookout. Comment
  JEPS73454  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1972-7-8 3054 Colusa n side of ridge running se Snow Mt., West Peak 1981 Comment
  JEPS75864  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1974-9-10 3884 Colusa base of rocky cliff along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  UCR261723  Eriogonum umbellatum var. smallianum Ann Howald 2003-5-30 2357 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
  HSC39241  Eriophyllum lanatum J. P. Smith, Thomas W. Nelson 1976-4-14 8578 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  SBBG83236  Eriophyllum lanatum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  UCR44912  Eriophyllum lanatum L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Rd, 2.2 mi. west of Mendocino National Forest boundary, NE of Clear Lake 678 Comment
  RSA755891  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UC1484434  Eriophyllum lanatum var. achilleoides Dale E. Johnson with J. E. Eckenwalder 1974-6-2 128 Colusa On ridge connecting East and West peaks of Snow Mt. 1999 Comment
  UCR206381  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  JEPS34737  Eriophyllum lanatum var. achilleoides W. L. Jepson 1938-6-9 18962 Colusa mountains between Indian Valley, Lake County, and Bear Valley, Colusa County (Complexion Canyon, hillslope); Complexion Canyon 579 Comment
  UCD70239  Eriophyllum lanatum var. arachnoideum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  CAS-BOT-BC301384  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1917-4-18 587 Colusa 5 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  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
  CHSC62894  Erodium botrys Vernon H. Oswald 1994-3-14 5992 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. 25 Comment
  UCD64269  Erodium cicutarium Craig D. Thomsen 2000-3-31 2066 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
  UC73462  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near College City; 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
  UC660108  Eryngium aristulatum var. aristulatum Milo S. Baker 1941-7-8 10110 Colusa s. Stony Ford (Valley along Bear Creek); Valley along Bear Creek Comment
  UCD58163  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch. Just west of the Hwy 20-Hwy 16 intersection, about 300 feet uphill to the west of the corral. 326 Comment
  UCD38844  Eryngium castrense Beecher Crampton 1958-6-26 4976 Colusa along Grieve road, just northeast Hershey R.R. siding, 5.5 miles south of College City. Comment
  CAS-BOT-BC40752  Erysimum capitatum Roxana S. Ferris 1926-4-23 6409 Colusa In grade beyond Mountain House on the Williams-Stonyford Road. Comment
  CHSC97866  Erysimum capitatum T. C. Fuller; G. D. Barbe 1986-3-6 4260 Colusa Leesville Grade west of Williams. Comment
  CAS-BOT-BC40753  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. Comment
  SEINET12011565  Erysimum capitatum Unknown 1998-4-17 10 Colusa Bear Valley, Leesville-Lodoga Rd, 2 road mi NE from Bear Vally Rd-Leesville-Lodoga Rd junction Comment
  POM143091  Erysimum capitatum var. capitatum Roxana S. Ferris 1917-4-14 576 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road Comment
  RSA590193  Erysimum capitatum var. capitatum Michael A. Vincent, Robert M. Rhode 1996-3-30 7287 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  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
  CHSC94464  Erythranthe floribunda Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CHSC106250  Erythranthe microphylla B. Castro; L. P. Janeway 2001-6-3 1254 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  CHSC35129  Erythranthe microphylla K. R. Stern 1980-5-5 6628 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC84196  Erythranthe microphylla Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  CHSC94638  Erythranthe nudata Lowell Ahart 2006-6-11 12663 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CHSC86121  Eschscholzia caespitosa Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 121 Comment
  HSC62925  Eschscholzia caespitosa Marla J. Carollo 1979-4-14 36 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20 412 Comment
  RSA293185  Eschscholzia caespitosa subsp. caespitosa J. P. Smith, Tom Nelson, Jane Nelson 1978-4-2 9560 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UCD57627  Eschscholzia californica Michele Lanctot; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. 356 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
  CAS-BOT-BC402976  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  SEINET10871887  Eschscholzia californica David B. Dunn, Katherine L. Morris; Melvin L. Conrad 1973-6-6 Dunn 381 Colusa Chaparral woodland and sparse oaks; on hwy 20, .3 mi e of lake county line. Comment
  CAS-BOT-BC5880  Eschscholzia caruifolia Mary Katherine (Mrs.) Brandegee 1889-4-1 s.n. Colusa Leesville Comment
  UC85498 Image available Eschscholzia caruifolia K. Brandegee Apr 1889 Colusa Colusa County. Near Leesville. Comment
  UCR206870  Eucalyptus camaldulensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14319 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  SEINET8523003  Eucalyptus globulus Kelly W. Allred 2006-1 Colusa Along I-5 south of Maxwell, road side rest stop 26 Comment
  CHSC78673  Eucalyptus tereticornis L. P. Janeway; B. Castro 2000-5-3 6701 Colusa Sacramento Valley. Along Hwy 99W 0.2 km north of Wadleigh Road; about 3.2 km north of Maxwell. 25 Comment
  CHSC64613  Euphorbia spathulata Vernon H. Oswald; Margie McNairn 1995-4-23 6680 Colusa Inner North Coast Ranges. Along a roadside ditch bordering Bear Valley Rd. s of Brim Rd. (Bartlett Springs Rd.), w of Williams. 417 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
  JEPS94662  Euphorbia spathulata Vernon Oswald and Lowell Ahart 1998-5-7 Colusa Bartlett Springs Rd. 2.1 mi w Bear Valley Rd. (0.8 mi e of Sawtelle Valley and Grapevine Flat roads) 524 Comment
  SEINET4673877  Euphorbia spathulata Richard R. Halse 2013-3-27 8760 Colusa Along State Hwy. 20 just east of the Colusa/Lake county Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53.; 0 558 Comment
  SEINET5586425  Euphorbia spathulata Richard R. Halse 2013-1 8760 Colusa Along State Hwy. 20 just eat of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53 558 Comment
  UCD57049  Euphorbia spathulata Gordon Harrington; Diana Hickson 2007-4-7 14 Colusa BLM Payne Ranch, SW of intersection Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  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
  UCD58096  Euphorbia spathulata Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3473 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  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
  CDA35306  Euphorbia spathulata Vernon H. Oswald & Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  UC71774  Euthamia occidentalis H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD61475  Extriplex joaquinana Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3896 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile SW of parking lot. 399 Comment
  UCD66909  Extriplex joaquinana 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. Southwest of Cowboy Camp on the west side of Bear Creek. Ridge to the north of spring box. 365 Comment
  UCD82479  Extriplex joaquinana Ellen Dean; Bob Schneider 2009-6-19 5779 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Ridges opposite Cowboy Camp parking area on W side of Bear Creek. 394 Comment
  CHSC110218  Festuca David Isle 1990-5-6 1983 Colusa Stony Creek watershed. Pendell Ranch abt 2 mi W of Co Rd 306 jct with Fouts springs Road; abt 150 yards south of Pendell home. 384 Comment
  UC2016538  Festuca bromoides Richard Olmstead 1984-4-29 530 Colusa On slopes by Walker Ridge Road 2.4 mi N of Calif. 20. Road follows ridge that is Lake/Colusa Co. line. Comment
  JEPS81290  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5902 Colusa s of Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  CAS-BOT-BC63012  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  CAS-BOT-BC63013  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville Comment
  UCD163874  Frangula californica subsp. tomentella Craig D. Thomsen 2000-5-11 2395 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  UCD83758  Frangula californica subsp. tomentella Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5954 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  CHSC52632  Frankenia salina James Jokerst 1985-4-24 2495 Colusa Near Lurline Creek. 41 Comment
  CHSC88540  Frankenia salina B. Castro; Aric Lester 2003-8-20 1442 Colusa Vicinity of Sites, Antelope Valley, and Funks Creek. In mud flats at north end and along E edge of lake. 94 Comment
  RSA123211  Frankenia salina H. S. Yates 1936-8-14 6135 Colusa 3 miles S. of Colusa 15 Comment
  CHSC76343  Fraxinus dipetala L. P. Janeway; B. Castro 1999-7-5 6500 Colusa Along Goat Mountain Road on south side of Little Stony Creek about 0.2 mi west of Trout Creek. Steep north facing shrubby slope. 530 Comment
  UCD70234  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  UCD58106  Fritillaria affinis Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3353 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 560 Comment
  UCD139660  Fritillaria agrestis S. W. Winter 1927-3-9 751 Colusa Arbuckle. 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
  JEPS42811  Fritillaria pluriflora Wayne Roderick 1966-3-26 Colusa 1/2 mi e of Robbers Flat (adjacent to Bartlett Springs Road, Bear Valley); Bear Valley 417 Comment
  UCD139703  Fritillaria pluriflora Dora Hunt; Mas Yumaguchi, Doran Hughes 1965-3-8 s.n. Colusa ca. 1/8 mile south of Lodoga on road to Leesville. Comment
  UCD82525  Fritillaria pluriflora Craig Thomsen; G. Harrington 2009-5-12 2882 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East- facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCR261676  Fritillaria pluriflora Ann Howald 2003-3-25 2283 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 1.5 miles southeast of Stonyford, just south of cattle guard at entrance to recreation area 364 Comment
  HSC59112  Fritillaria purdyi Terry Roth 1979-4-14 10 Colusa 1067 Comment
  UCSC010370  Galium andrewsii subsp. andrewsii Dylan M. Neubauer, Tim Forsell 2016-3-30 594 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  JEPS95487  Galium aparine Vernon H. Oswald and L. Ahart 1994-4-6 6062 Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UCD64437  Galium aparine Craig D. Thomsen 2000-3-31 2070 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD121724  Galium aparine William Pyott 1962-4-28 23 Colusa West of road in Bear Valley. Comment
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS75849  Galium grayanum var. nanum L. R. Heckard 1974-9-10 3898 Colusa top of East Peak Snow Mt.; , top of East Peak 2133 Comment
  RSA133259  Galium grayanum var. nanum Peter H. Raven, Richard Snow 1959-9-11 14411 Colusa S shoulder of Snow Mtn. 2043 Comment
  CHSC86129  Galium parisiense Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  JEPS110109  Galium parisiense Lowell Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA725011  Galium parisiense L. Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  UC1177932  Galium parisiense Francia Chisaki and Gene B. Newcomb 1958-6-19 1134 Colusa about 3 mi w Stonyford (along path leading to dam); Diversion Dam Camp 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
  UCD64440  Galium parisiense Craig D. Thomsen 2000-3-31 2080 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD72471  Galium parisiense Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3805 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
  UCD82120  Galium parisiense Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5648 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD163913  Galium porrigens var. porrigens Sara Martin 2016-4-9 5 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Hill to the south of corral at junction of 16 and 20. 464 Comment
  UCD81242  Galium porrigens var. tenue Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5406 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  JEPS17975  Galium porrigens var. tenue George B. Rossbach 1955-4-9 508 Colusa Route 20; w edge of county 563 Comment
  UCD121929  Galium tricornutum Barrie Stanfield 1966-4-16 25 Colusa 4 miles north of Wilbur Springs. Comment
  CHSC48888  Galium trifidum var. pacificum Vernon Oswald 1984-7-20 1615 Colusa Lily Pond N of Letts Lake in Mendocino National Forest. 1280 Comment
  CDA42204  Galium trifidum var. pacificum G. D. Barbe, Daryl Brown 1982-7-2 3891 Colusa Mill Valley Campground, Lower Letts Lake, Mendocino National Forest. Comment
  CAS-BOT-BC199030  Garrya congdonii Roxana S. Ferris 1926-4-23 6456 a Colusa Rocky hills between Leesville and Stonyford, 4 mi. from Stonyford Comment
  CDA12374  Garrya congdonii G. F. Hrusa 1996-1-2 12627 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  CHSC22851  Garrya congdonii Robert A. Schlising 1962-1-31 2031 Colusa Coast Ranges. Along Stoney Creek. 441 Comment
  CHSC39247  Garrya congdonii B. A. Stein 1982-5-2 535 Colusa South end of East park Reservoir. Comment
  SBBG34146  Garrya congdonii R. D. Slayback 1959-3-20 2 Colusa near St Hwy 16, 6 mi NW of Rumsey 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
  UCD121096  Garrya congdonii Robert D. Slayback 1959-3-20 2 Colusa Near State Highway 16, 6 miles northwest of Rumsey. Comment
  UCD56678  Garrya congdonii Jack Alderson 2007-3-25 14 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
  JEPS80433  Garrya fremontii L. R. Heckard and R. Bacigalupi 1976-9-6 4421 Colusa above Summit Springs (along trail to Fouts Camp, Lake-Colusa County boundary); Snow Mt. 1615 Comment
  OBI14152  Garrya veatchii Rimo Bacigalupi, G. T. Robbins 1954-6-25 4623 Colusa 1/2 mi E of summit (Lake-Colusa County line) on rd from Indian Valley (Lake County) to Bear Valley (Colusa County) 549 Comment
  CDA5308  Gaura neomexicana Kingwill Jun 1944 Colusa 0 Comment
  JEPS80183  Gayophytum humile L. R. Heckard with J. Hickman 1980-7-3 5335 Colusa just w Summit Springs (sw Snow Mt., ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1548 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
  UCD103294  Geranium carolinianum Beecher Crampton 1958-5-19 4806 Colusa west of Lodoga, Little Stony Creek Canyon. Comment
  UCD164160  Geranium dissectum Craig Thomsen 2000-4-28 2268 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD82816  Geranium dissectum Craig Thomsen; G. Harrington 2009-5-12 2890 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD57289  Geranium molle Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3660 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 322 Comment
  CHSC75627  Geum macrophyllum Vernon H. Oswald; Lowell Ahart 1999-6-22 9781 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at Lily Pond. 1243 Comment
  UC1614445  Gilia Charles M. Belshaw 1937-4-25 2834 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
  UCD82541  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5697 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UC1585898  Gilia capitata subsp. abrotanifolia Barbara Ertter 1989-7-1 8601 Colusa road to Goat Mt. Lookout 2.2 mi s Rt M-10 (Bear Creek-Fouts Spring Rd) (ca 12 mi wsw of Stonyford, sw side of ridge, at head of creek); S. Fk. Stony Creek 1500 Comment
  HSC45794  Gilia tricolor J. P. Smith, Thomas W. Nelson 1976-4-14 8581 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  HSC66136  Gilia tricolor S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Colusa Bartlett Springs Rd. Comment
  SEINET12326985  Gilia tricolor Unknown 1984-1 7 Colusa ca 0.5 km W of jct of Hwys 20 and 16, S side of Bear Creek, ca 29 SW of Williams 322 Comment
  UCD15437  Gilia tricolor Lisa Montang 1985-4-13 5 Colusa California, Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  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
  UC1051502  Githopsis diffusa subsp. robusta Helen K. Sharsmith 1953-6-19 4283 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  HSC47647  Githopsis specularioides J. P. Smith, J. O. Sawyer 1978-4-29 9789 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  UCD72440  Githopsis specularioides Kim E. Steiner 1978-4-29 196 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  RSA523935  Glinus lotoides Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa SE end of East Park Reservoir N of Lodoga. 366 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
  UCD72477  Glycyrrhiza lepidota Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3811 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
  RSA724829  Grindelia camporum L. Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CAS-BOT-BC305304  Grindelia hirsutula Roxana Stinchfield 1916-7-11 455 Colusa Colusa--Williams Road at the trough Comment
  UCD146597  Grindelia hirsutula G. F. Hrusa 1998-6-19 14598 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
  RSA0016943  Grindelia hirsutula var. davyi C. B. Wolf 1928-5-8 2126 Colusa 3 miles S of Arbuckle, Pacific Hwy. Comment
  JEPS80118  Hackelia amethystina L. R. Heckard with J. Hickman 1980-7-1 5275 Colusa n side of East Peak; Snow Mountain 2072 Comment
  CHSC91036  Hackelia micrantha D. Isle 2003-6-25 378 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0524627E 4345811N. 1731 Comment
  UCD85141  Hainardia cylindrica Beecher Crampton 1953-4-29 1143 A Colusa Colusa County, 2 miles east of Maxwell. Comment
  UCD85147  Hainardia cylindrica Beecher Crampton 1958-5-19 4795 Colusa 10.1 miles southeast of Leesville, foothill area. Comment
  JEPS117118  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Rd., ~ 8.3 km N of jct. with Hwy. 20; ~ 1 km N of jct. w/ Indian Valley Reservoir Rd., at road-cut, both sides and adjacent slopes 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
  UCD82590  Harmonia hallii Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2735 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
  CDA34807  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Road, ~8.3 km N of jct. with Hwy. 20, ~1 km N of jct with Indian Valley Reservoir Rd., at road cut, both sides and adjacent slopes. Comment
  CHSC32204  Hazardia whitneyi var. discoidea James Jokerst 1980-8-7 1068 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UCD64431  Helianthus annuus Craig D. Thomsen 2000-6-23 2428 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CDA15546  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1/2 mi. from Lodoga/Stonyford Rd. Comment
  CHSC94313  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
  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
  RSA7606  Helianthus bolanderi C. B. Wolf 1955-6-25 5505 Colusa West side of Bear Valley, near mitchell Ranch House. Inner north coast Range. Upper Sonoran Digger River 305 Comment
  CHSC84973  Heliotropium curassavicum Lowell Ahart 2003-10-23 10663 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC89839  Heliotropium curassavicum B. Castro; L. Janeway 2001-5-10 1250 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. At side of dirt road paralleling N-S-trending perennial creek. 381 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
  UCD82509  Hemizonia Craig Thomsen; G. Harrington 2009-5-12 2867 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 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
  UCD159329  Hemizonia congesta subsp. luzulifolia D. S. Park 2010-6-5 113 Colusa Colusa County.: Walker ridge, Cold Spring Mt. roadside, grassland. 781 Comment
  UCD160070  Hemizonia congesta subsp. luzulifolia Ellen Dean; Craig Thomsen and Davis Botanical Society 2015-4-25 8629 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Lynch Canyon near 'Bullfrog Pond. 384 Comment
  UCD61435  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3880 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCD61455  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3901 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just north of the headwaters of Eula Canyon. 339 Comment
  UCD72483  Hemizonia congesta subsp. luzulifolia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3817 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
  CAS-BOT-BC309737  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa Between Williams and Maxwell Comment
  CHSC79460  Hesperevax acaulis var. acaulis B. Castro; L. P. Janeway 2000-5-2 1107 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 237 Comment
  CHSC76742  Hesperevax caulescens J. Marr; H. West, C. Warren 1998-4-14 Colusa NW of town of Sites, vicinity of Grapevine and Stone Corral Creeks. 158 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
  UCSC010368  Hesperocyparis macnabiana Dylan M. Neubauer, Tim Forsell 2016-3-30 592 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  CHSC48598  Hesperolinon californicum Vernon Oswald 1986-5-12 2010 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. Common in a grassy opening on a serpentine slope. 487 Comment
  JEPS122888  Hesperolinon californicum Adam C. Schneider with Will Freyman and Yuri P. Springer 2014-5-20 642 Colusa Along north side of Brim Rd east of Indian Valley Reservoir, near Colusa/Lake Co line. Comment
  JEPS94735  Hesperolinon californicum Vernon H. Oswald and Lowell Ahart 1998-7-15 9269 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UCD63873  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwys 16 and 20. Cowboy Camp area on the west side of Hwy 16, 1 mile south of Hwy 20. 0.25 mile west of public viewing area and Bear Creek. 305 Comment
  UCR261748  Hesperolinon californicum Ann Howald 2003-5-29 2347 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
  SD51765  Hesperolinon congestum Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cooks Springs. 548 Comment
Read comments
Jul 18 2010
  UCD110514  Hesperolinon didymocarpum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD110515  Hesperolinon didymocarpum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  CHSC94727  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UC1088845 Image available Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca. 1 mi above Diversion Dam of Big Stoney Creek (near road from Stoneyford to Fouts Springs); Mendocino National Forest; 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
  UCD63114  Hesperolinon disjunctum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4945 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
  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
  OBI12542  Hesperolinon disjunctum Rimo Bacigalupi, G. T. Robbins 1954-6-25 4622 Colusa 0.1 mi E of Lake county line and E of summit of rd from Bear Valley to Indian Valley 640 Comment
  RSA151789  Hesperolinon disjunctum H. K. Sharsmith 1959-5-27 4696 Colusa Colusa County: foot of grade on lower Lake to Williams road, W side Bear Valley. 427 Comment
Read comments
Jan 23 2009
  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
  RSA262575  Hesperolinon disjunctum Marilyn Ivey 1973-5-19 55 Colusa 1.5 miles up Wilbur Springs Road north off of State Highway 20. Comment
  UC1212479  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 Colusa 1 mi below Cook Springs; Inner North Coast Ranges 518 Comment
  CAS-BOT-BC167447  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs 548 Comment
  CHSC111649  Hesperolinon drymarioides David Isle; Geri Hulse-Stephens 1979-6-15 2060 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. NE of junction of Frenzel Creek with Little Stony Creek. 426 Comment
  UC1212304  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa n canyon slope overlooking Cook Springs; Inner North Coast Ranges 548 Comment
  UCD110523  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs. 548 Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD82742  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2923 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  CHSC94643  Heterocodon rariflorum Lowell Ahart 2006-6-11 12678 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
  SEINET4675377  Heteromeles arbutifolia Richard R. Halse 2012-3-29 8458 Colusa Along State Hwy. 20 just east of the Lake County Line, ca. 14.6 miles east of the junction with State Hwy. 53.; 0 558 Comment
  UCD72451  Heteromeles arbutifolia Ellen Dean; Gordon Harrington 2006-11-10 3312 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch, along ridge trail above Cache Creek. 535 Comment
  JEPS81347  Heuchera micrantha var. pacifica L. R. Heckard and J. C. Hickman 1982-7-7 5958 Colusa nw side Snow Mt (Crooked Tree Ridge) 1935 Comment
  UCSC003615  Heuchera micrantha var. pacifica L. Amidon, C. Rutherford 1975-6-5 45 Colusa In shaded rocks of promontory on southeast corner of Snow Mt. overlooking and 3 miles northwest of Fouts Springs. Snow Mountain. Comment
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CDA38628  Hibiscus trionum Ken Flagor 2012-8-28 PDR# 060 P089080 Colusa North of Maxwell; north of Lenahan Road, south of Delevan Road, west of Sutton Road, east of McDermott Road. 0 Comment
  RSA0016033  Hippuris vulgaris J. M. Tucker, L. K. Mann 1959-5-30 3528 Colusa Small lake in Mill Valley, ca. 0.25 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1220 Comment
  RSA523605  Holocarpha virgata subsp. virgata Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8875 Colusa NW side of East Park Reservoir near end of East Park Road form Stonyford. 366 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
  UC725605  Holocarpha virgata subsp. virgata A. A. Heller 1940-6-7 15721 Colusa road to Sites; Lodogo Comment
  UCD55458  Holocarpha virgata subsp. virgata Ellen Dean; Gordon Harrington 2006-10-6 3282 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
  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
  CHSC107983  Hordeum brachyantherum subsp. brachyantherum B. Castro; L. Janeway 2011-4-27 1864 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
  JEPS118603  Hordeum brachyantherum subsp. californicum B. Castro, L. P. Janeway 2001-6-3 1260 Colusa Inner North Coast Ranges. Til Jones Spring at headwaters of Freshwater Branch of E. Fork Sulphur Creek, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Wilbur Springs 7.5' quad. 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
  UCD163712  Hordeum marinum subsp. gussoneanum Craig Thomsen 1999-5-10 2023 b Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CHSC110839  Hordeum marinum subsp. gussoneanum David Isle 1989-5-14 1999 Colusa Stony Creek Watershed. Pendell Ranch--2 miles W of Co. Rd. 306 Jct w/ Fouts Ssprings Road. 150 yards south of Pendell home. 384 Comment
  RSA669471  Hordeum murinum subsp. glaucum R. R. Halse 2001-3-22 5946 Colusa Williams, along vacant lot by 455-4th street. 18 Comment
  CHSC83693  Hordeum vulgare L. P. Janeway 2002-4-24 7522 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD82589  Horkelia californica var. elata Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2734 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  JEPS95511  Hornungia procumbens Vernon H. Oswald and L. Ahart 1994-4-6 6075 Colusa T16N R7W SW1/4 Sec. 11, 1800 ft, Chaparral. Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford 548 Comment
  HSC48199  Hypochaeris glabra Thomas W. Nelson, Jane P. Nelson 1978-4-29 3957 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  RSA256676  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Road, ca. 0.7 mile from junction with Little Indian Valley Road 854 Comment
  UCD56938  Iva axillaris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3540 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CHSC62909  Juncus balticus Vernon H. Oswald 1994-4-11 6104 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, at the SW corner of Tract 39. 25 Comment
  CHSC86837  Juncus balticus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  JEPS80251  Juncus balticus L. R. Heckard, and J. Hickman 1980-9-15 5430 Colusa below Summit Springs (Lake-Colusa County boundary); Snow Mt. 1524 Comment
  UCR212366  Juncus balticus Craig D. Thomsen 2000-4-28 2178 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  CHSC107173  Juncus balticus subsp. ater L. P. Janeway; B. Castro 2011-5-19 10284 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Eastern of the 2 Juncus patches at the south edge of the marsh, just above high water line. 50 Comment
  HSC62947  Juncus balticus subsp. ater Marla J. Carollo 1979-4-14 32 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  UCD61468  Juncus balticus subsp. ater Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3914 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
  CHSC112219  Juncus bufonius Lowell Ahart 2013-5-1 18691 Colusa Inner North Coast Range. In a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS93871  Juncus bufonius var. congestus Vernon H. Oswald and Lowell Ahart 1998-7-15 9305 Colusa w side of county on Walker Ridge Road 8.2 mi s of Bartlett Springs Road (6.3 mi n of Highway 20); Walker Ridge Road 792 Comment
  JEPS80387  Juncus covillei L. R. Heckard and J. Hickman 1981-6-22 5620 Colusa along Dark Hollow Creek Snow Mt. 1889 Comment
  JEPS80259  Juncus covillei L. R. Heckard and J. Hickman 1980-9-15 5439 Colusa n of road at Summit Springs (Snow Mountain, Lake-Colusa County Boundary); Snow Mountain, Summit Springs 1524 Comment
  CHSC94441  Juncus ensifolius Lowell Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110176  Juncus ensifolius Lowell Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724953  Juncus ensifolius L. Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  JEPS75870  Juncus howellii L. R. Heckard and J. H. Thomas 1974-9-10 2890 Colusa s East Peak (upper reaches of creek); Snow Mt., Dark Hollow Creek 2011 Comment
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  UCD61460  Juncus mexicanus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3906 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  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
  CHSC90870  Juncus phaeocephalus D. Isle 2002-6-28 176 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Below a 4x4 Rd. 17N31 (Lovelady Ridge Jeep Rd.). 1060 Comment
  SBBG119881  Juncus xiphioides L. Ahart 2006-8-9 13145 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  UCD63130  Juncus xiphioides Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4960 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  CDA20252  Juncus xiphioides G. D. Barbe, Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  CHSC32198  Kelloggia galioides James Jokerst 1980-8-8 1083 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS73503  Kelloggia galioides L. R. Heckard 1972-7-10 3121 Colusa near Trout Crossing of trail to Box Springs (Snow Mt.); Snow Mt. 1828 Comment
  UCD164166  Koeleria macrantha Craig Thomsen 2001-5-6 2558 Colusa Wilbur Hot Springs. Comment
  UCD72528  Koeleria macrantha Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3819 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek along trail that begins approximately opposite the BLM parking lot near south end of bridge. Approx. 0.75 mile along trail. 286 Comment
  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
  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
  CHSC94692  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  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
  OBI15966  Lagophylla minor Robert F. Hoover 1968-5-27 11098 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) 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
  JEPS38990  Lagophylla minor W. L. Jepson 1938-6-9 18959 Colusa mts. betw. Indian Valley (Lake Co.) and Bear Valley (Colusa Co.) 579 Comment
  RSA0011767  Lagophylla minor A. A. Heller 1940-5-6 15578 Colusa On State Hwy 20, 2 miles W of the junction with Hwy 16. Comment
  SEINET9310484  Lagophylla ramosissima Unknown 2009-5-20 14740 Colusa Central Inner Coast Ranges: along CA-16 near Bear Creek, 1.6 miles S of the jct with CA-20 (Glasscock Mountain 7.5' W). Chaparral and oak woodland. Occasional on open flat in disturbed soil. Comment
  UCD56930  Lamium amplexicaule Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3533 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 353 Comment
  CAS-BOT-BC337883  Lasthenia Peter Rubtzoff 1978-5-14 9167 Colusa Bear Valley Road ca. 4-5 miles south of junction of the road to Fort Ross State Historic Park. Bartlett Springs Road Comment
  UCD23380  Lasthenia californica subsp. californica George C. Ziobro 1978-4-8 2 Colusa collected off of Bear Valley Road 10.3 miles north of the junction with State Route 20. 396 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
  UCD18839  Lasthenia fremontii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 146 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
  CAS-BOT-BC353479  Lasthenia fremontii Mrs. Alvin Seale 1932-4-17 s.n. Colusa unspecified 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
  CAS-BOT-BC328109  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1917-4-12 503 Colusa 4 miles E of Williams Comment
  POM163441  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa 3 miles W of Colusa. Comment
  CHSC101593  Lasthenia glabrata subsp. glabrata David W. Isle; Rhonda Isle, Dorothy Lingerfelt 1998-4-19 1661 Colusa Mendocino National Forest; Keegan Ranch, adj. Bear Valley Road. MDB and M. Comment
  UCR212333  Lasthenia glabrata subsp. glabrata Craig D. Thomsen 2000-3-31 2046 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
  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
  UCD132538  Lasthenia gracilis Beecher Crampton 1958-4-21 9169 Colusa 3.5 miles N.W. of Lodoga by road. Comment
  UC90010  Lasthenia platycarpha T. S. Brandegee 1889-4-12 Colusa Colusa Junction Comment
  JEPS127615  Lathyrus jepsonii var. californicus B. Castro with Tom Boullion 2008-6-4 1733 Colusa Ca 5 air miles N of Colusa, ca 0.5 mi E of Hwy 45 off N edge of Reservation Road. On upper terrace within levee, overlooking riprap-lined bend in the Sacramento River (River-mile 154.3). Comment
  JEPS95647  Lathyrus jepsonii var. californicus Vernon H. Oswald and L. Ahart 1999-6-22 9782 Colusa West of Stonyford and 0.7 mi south of Letts Lake Road on FS 17N02: T17N R8W Sect. 25, 4440 ft, mixed coniferous forest 1353 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
  HSC67099  Lathyrus vestitus subsp. vestitus Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 38 Colusa Bartlett Springs Rd. at stream crossing. 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
  CHSC48511  Lathyrus vestitus var. vestitus Vernon Oswald 1986-5-12 2009 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. 487 Comment
  CAS-BOT-BC323903  Layia chrysanthemoides Roxana S. Ferris 1926-4-23 6404 Colusa Roadside near Mountain House on Williams-Stonyford Road 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
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  UC638650  Layia chrysanthemoides Ethel Crum 1938-5-8 2038 Colusa four mi s of Leesville; Bear Valley 426 Comment
  UCD163205  Layia chrysanthemoides Craig D. Thomsen 2000-3-31 2073 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
  POM284945  Layia chrysanthemoides Lyman Benson 1935-3-27 6341 Colusa Williams; Mt. Range: Inner N Coast; Watershed: Sacramento River 61 Comment
  UCD133958  Layia chrysanthemoides J. M. Tucker; Dorothy Dreyfus 1967-4-29 4035 Colusa at south end of Bear Valley. 6.3 miles north of junction of Bear Valley Road with State Highway 20. 426 Comment
  UCR37887  Layia chrysanthemoides subsp. chrysanthemoides C. G. Phillips, L. Cole, SA. Haultain, K. B. Barrows 1984-4-29 32 Colusa Bear Valley road Comment
  CHSC110419  Layia platyglossa David Isle; Rhonda Isle; Hank Switzer 2011-4-14 1950 Colusa North Coast Ranges. Bear Valley on S edge of Bear Valley R. MDBM. 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
  UCD15426  Layia platyglossa Margit Sands 1985-4-13 29 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  UCD163306  Layia platyglossa Craig D. Thomsen 1997-4-20 1909 Colusa Bear Valley. About 5 miles north of Hwy 20. 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
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC380897  Layia platyglossa Ethel Crum 1936-5-8 2036 Colusa Bear Valley 4 miles south of Leesville 426 Comment
  UCD135674  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
  CAS-BOT-BC329324  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  CHSC91503  Layia septentrionalis D. Isle 1995-4-27 390 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. East Park Reservoir Spillway Rd., just SE of spillway and on both sides of road just before spillway summit. 365 Comment
  JEPS13436  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UC761877  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UCR261644  Layia septentrionalis Ann Howald 2003-3-26 2290 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  UCR261645  Layia septentrionalis Ann Howald 2003-3-26 2289 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 407 Comment
  UCR261647  Layia septentrionalis Ann Howald 2003-4-23 2309 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
  UCR261678  Layia septentrionalis Ann Howald 2003-4-24 2315 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, west side Little Stony Creek, opposite the dam 350 Comment
  UC1101273  Lemna aequinoctialis Herbert L. Mason 1946-8-15 13009 Colusa 2 mi w on Williams Highway by bridge Colusa; Williams Highway Comment
  POM185961  Lemna gibba A. A. Heller, H. E. Brown 1902-5-19 5571 Colusa Near 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
  CAS-BOT-BC527300  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Below Letts Meadow on road from Bear Creek to Foutes Spring 914 Comment
  POM312464  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Lake below Letts Meadow on road from Bear Creek to Foutes Spring 915 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
  UCD66919  Leontodon saxatilis Craig D. Thomsen; G. Harrington 2008-7-6 2777 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  UC117628  Lepidium dictyotum var. acutidens K. Brandegee Apr 1889 Colusa Colusa Junction Comment
  CHSC62926  Lepidium dictyotum var. dictyotum Vernon H. Oswald; Lowell Ahart 1994-4-6 6074 Colusa Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford. Along a drainage. 548 Comment
  CHSC91136  Lepidium latifolium D. Isle 1997-7-31 333 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. 3 mi. S of jct. Bartlett Springs/Bear Valley Rd. 304 Comment
  UCD72469  Lepidium latifolium Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3803 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
  CDA24916  Lepidium latipes D. Brown 1977-5-5 Colusa Terhel Farms Inc., Williams. 0 Comment
  CAS-BOT-BC89761  Lepidium latipes Brandegee s.n. Colusa Unspecified. Comment
  CHSC112923  Lepidium latipes var. latipes B. Castro; L. Janeway, Robin Carter 2010-3-23 1802 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal, in disturbed, grazed annual grassland. 120 Comment
  UCD57874  Lepidium latipes var. latipes Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 52 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
  JEPS53702  Lepidium nitidum W. L. Jepson 1920-5-23 8967 Colusa 2-3 mi sw Leesville (foot of Bartlett grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  CHSC79002  Lepidium strictum J. Marr; C. Warren, H. West, N. Wight 1998-6-11 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek. 114 Comment
  RSA799180  Lepidium strictum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17134 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 2.0 mi southeast of Sites. 85 Comment
  UCD63675  Leptochloa fusca subsp. fascicularis Elizabeth Wilson 1940-1 Colusa Colusa. Comment
  RSA424704B  Leptosiphon bicolor Aaron Liston, M. A. Blumler 1987-4-26 667 -6 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  HSC85856  Leptosiphon bicolor Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  HSC85934  Leptosiphon bicolor Michalski, Raum, Hopson 1987-4-12 61 Colusa Side of Leesville-Williams Rd. Comment
  UCD14330  Leptosiphon bicolor Kathi A. Zurakowski 1984-4-21 Colusa Colusa Co.; Bear Valley, 3.2 miles north of Wilbur Springs turnoff, west of road; 381 Comment
  POM310950  Leptosiphon bolanderi H. L. Mason 1941-4-5 12404 Colusa Three miles south of Stonyford 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
  HSC65995  Leptosiphon ciliatus Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 51 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  UCD57704  Leptosiphon ciliatus Daniel Chau; 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. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  UCR261753  Leptosiphon ciliatus Ann Howald 2003-5-29 2348 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
  CHSC1269  Leptosiphon parviflorus V. Holt 1935-5-12 Colusa Stonyford. Comment
  CHSC79792  Leptosiphon parviflorus L. P. Janeway; B. Castro 2000-5-4 6703 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UC1613491  Leptosiphon parviflorus Charles M. Belshaw 1937-4-25 2829 Colusa Inner North Coast Range: Cooks Springs, Devils Ridge Comment
  UCD81858  Leptosiphon parviflorus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5742 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
  CHSC32205  Lesquerella occidentalis subsp. occidentalis James Jokerst 1980-8-7 1067 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  NY180585  Lessingia nemaclada M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  RSA134705  Lessingia nemaclada P. H. Raven, R. Snow 1959-9-11 14425 Colusa About 2 miles south-east of Happy Camp 762 Comment
  JEPS85618  Lessingia ramulosa Rimo Bacigalupi with G. T. Robbins 1954-6-25 4621 Colusa 0.1 mi e Lake County line (e of summit of road from Bear Valley to Indian Valley) 640 Comment
  RSA700360  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  UC1552844  Lessingia ramulosa Frederica Bowcutt 1985-6-19 604 Colusa about 2 air mi n Wilbur Hot Springs (just sw of Bear Valley); Bear Valley, Wilbur Hot Springs Comment
  UCD61472  Lessingia ramulosa Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3918 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCD66698  Lessingia ramulosa Craig D. Thomsen 2000-6-23 2400 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66708  Lessingia ramulosa Craig D. Thomsen 2001-5-24 2507 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.17 and 2.25. 342 Comment
  HSC31308  Lewisia rediviva Carter Schleicher 1974-5-4 25 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  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
  UC1146611  Leymus triticoides Freed W. Hoffman 1944-7-14 1954 Colusa Wilbur Springs North Coast Ranges Comment
  CHSC75651  Lilium pardalinum subsp. pardalinum Vernon H. Oswald; Lowell Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  CDA34116  Limnanthes alba P. Hiatt 1979-4-26 7 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC84972  Limosella acaulis Lowell Ahart 2003-10-23 10678 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
  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
  IRVC29626  Linanthus Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5023 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  UC971715  Linanthus bolanderi Herbert L. Mason 1941-4-5 12404 Colusa 3 mi s Stonyford Comment
  UC201776  Linanthus bolanderi Volney Rattan 1884-5-20 Colusa summit above Foute's Springs Comment
  CHSC112227  Linanthus ciliatus Lowell Ahart 2013-5-1 18668 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
  UC614691  Linanthus ciliatus L. Constance 1938-4-22 2149 Colusa 11 mi ne Lake-Colusa County line (Lower Lake-Williams road, above Salt Creek); Inner North Coast Ranges 152 Comment
  UC125228  Linanthus filipes Katharine Brandegee Apr 1889 Colusa Leesville Comment
Read comments
Aug 28 2012
  UC618381  Linanthus parviflorus Alice Eastwood and John Thomas Howell 1938-5-16 5630 Colusa Lake-Colusa county line, on road to Williams Comment
  JEPS39670  Linanthus parviflorus Rimo Bacigalupi, and T. Crovello, and L. Heckard 1965-4-26 9047 Colusa 2.5 mi from Ladoga junction (at summit w of Bear Valley on road to Bartlett Springs, Colusa-Lake County boundary) 670 Comment
  UCD118726  Linanthus pungens G. Ledyard Stebbins Jr. 1964-7-4 6172 Colusa Mt. St. John, west of Stonyford. 1676 Comment
  UCD58099  Lithophragma affine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3476 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
  CAS-BOT-BC432295  Lithophragma campanulatum Helen K. Sharsmith 1953-7-1 4403 Colusa above Linger Longer Camp, Goat Mountain, Mendocino National Forest 1615 Comment
  UCD102676  Lithophragma campanulatum A. M. Shapiro 1994-6-12 s.n. Colusa Below Steel Trap Rock, vicinity of Goat Mtn. (close by to the south of the rock). 1310 Comment
  SEINET8720321 Image available Lithophragma parviflorum Helen K. Sharsmith 1953-1 4403 Colusa Above Linger Longer Camp, Goat Mountain, Mendocino National Forest. 1615 Comment
  UCD57556  Lolium multiflorum Andrew Pedersen; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  JEPS80876  Lolium perenne L. R. Heckard and J. C. Hickman 1980-7-3 5365 A Colusa sw slope Snow Mt. (grazed slopes about Summit Springs); sw slope of Snow Mt., about Summit Springs 1554 Comment
  RSA0011990  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCR233445  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UC38800  Lolium temulentum J. Burtt Davy May, 1898 4293 Colusa near Princetown Comment
  RSA424750  Lomatium Aaron Liston, M. Blumler 1987-4-26 667 -7 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD56941  Lomatium Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3543 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 349 Comment
  UCR206393  Lomatium George K. Helmkamp, E. A. Helmkamp 2009-3-11 14374 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  CHSC91217  Lomatium californicum D. Isle 2003-6-4 370 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 0.2 mi. W of M-10/M-5 jct. on N. edge of M-10. 621 Comment
  UCD80835  Lomatium californicum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5292 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. South side of canyon that is located to the north of Brophy Canyon. 274 Comment
  CDA33705  Lomatium ciliolatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CDA38340  Lomatium ciliolatum var. hooveri T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  UCR261661  Lomatium dasycarpum Ann Howald 2003-5-5 2330 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 0.25 mile west of intersection with Lodoga-Stonyford Road 394 Comment
  CHSC91009  Lomatium dasycarpum subsp. tomentosum D. Isle 2002-4-18 289 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Motorcycle info. Center and Fouts Spring Rd., above 18N01.2 jct. w/ OHV trail. 451 Comment
  UC903739  Lomatium hooveri Milo S. Baker 1947-4-6 11646 Colusa near Hwy. 20 ca. 1 mi. e. Lake-Colusa Co. line Comment
  UCD163312  Lomatium hooveri Craig D. Thomsen 1997-4-18 1901 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD56662  Lomatium hooveri Sam Bledsoe 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  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
  UCSC010456  Lomatium hooveri Dylan M. Neubauer, Tim Forsell 2016-3-31 601 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  UCD163700  Lomatium macrocarpum Craig Thomsen 1999-5-10 2009 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA33687  Lomatium macrocarpum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC77910  Lomatium marginatum var. purpureum Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Sites and Stone Corral Creek. 121 Comment
  JEPS16220  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  UCD67095  Lomatium triternatum Ellen Dean; Davis Botanical Society 2008-5-31 5024 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  JEPS17548  Lomatium utriculatum Alice King May, 1906 Colusa College City Comment
  UC1053478  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UC630428  Lomatium utriculatum Annetta Carter 1938-5-8 1387 Colusa 3 mi. n. Leesville (on Lodoga rd.); Inner N. Coast Range Comment
  UCD57859  Lomatium utriculatum Gordon Harrington 2007-4-17 29 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  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
  UCD40913  Lomatium utriculatum Jim Mosby 1984-4-21 5 Colusa Bear Valley, 10 miles north on Bear Valley Road. 426 Comment
  CHSC86839  Lotus corniculatus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  CHSC94444  Lotus corniculatus Lowell Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  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
  JEPS80212  Lotus corniculatus L. R. Heckard and J. Hickman 1980-7-3 5366 Colusa sw slope Snow Mt. (about Summit Springs); , Summit Springs 1554 Comment
  UCR227340  Lotus denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  JEPS80208  Lotus denticulatus L. R. Heckard and J. Hickman 1980-7-3 5362 Colusa n of (across road) Summit Springs (sw slope of Snow Mt., Lake-Colusa County boundary); Snow Mt. 1548 Comment
  CDA15501  Lotus grandiflorus G. F. Hrusa, Willie the Dog 1998-6-19 14638 Colusa North Coast Ranges; Below Fouts Springs on Fouts Springs Rd. to Stonyford. Immed. below Candy Bucket Spring crossing. Comment
  JEPS60198  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa on road above and w Fouts Springs 762 Comment
  JEPS60204  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa about 6.5 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  RSA516409  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2236 Colusa Along Trough Spring Ridge road 1/2 mile southwest of its junction with the Stonyford-Fouts Spring road (about 5 miles west of Stonyford). 732 Comment
  HSC45721  Lotus humistratus M. Alcasas 1978-4-22 45 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCR206894  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14363 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  POM163464  Lotus humistratus Roxana S. Ferris 1926-4-23 6417 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  RSA725014  Lotus unifoliolatus L. Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
Read comments
Aug 9 2017
  UCD65956  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 68 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. 12 Comment
  UCD78332  Ludwigia hexapetala B. J. Grewell 2006-7-11 06- 17 -LU Colusa Delevan National Wildlife Refuge. Managed seasonal pond at SE corner of refuge, north of Maxwell Road, immediately west of Colusa Basin Drain. 17 Comment
  UCD78320  Ludwigia peploides subsp. peploides B. J. Grewell; Mike Wolder 2006-7-11 06- 16 -LU Colusa Colusa National Wildlfe Refuge, west of Colusa, CA. CNWR tract T24.8. 14 Comment
  UC726672  Lupinus A. A. Heller 1940-4-21 15542 Colusa along U.S. Highway #99W, 2 mi s Williams Comment
  JEPS81378  Lupinus adsurgens L. R. Heckard and J. C. Hickman 1982-7-8 5989 Colusa 1/4 mi sw East Peak (Snow Mt.); , sw of East Peak 2087 Comment
  UCD82547  Lupinus albifrons Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5702 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  POM163513  Lupinus albifrons var. albifrons Roxana S. Ferris 1926-4-23 6422 Colusa Near summit on grade. Williams- Stonyford Road. Comment
  POM299305  Lupinus albifrons var. albifrons H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams. Comment
  UCD83747  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 a Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  NY15769  Lupinus albipilosus A. A. Heller 1940-4-21 15543 Colusa Border of a field along U. S. Highway #99W, 2 miles south of Williams, in the Lower Sonoran LIfe Zone. Comment
  HSC89740  Lupinus bicolor B. Hoffman, A. Eller, A. Smith 1989-4-15 24 Colusa Off Bear Valley Rd., 1.2 mi. S of Brim Rd. 396 Comment
  SEINET12164083  Lupinus densiflorus Unknown 1984-1 11 Colusa ca Salt Canyon, N side of Salt Crk, Hwy 20, 11miWSW of Williams. Wilbur Springs Quad 143 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
  SEINET10485227  Lupinus densiflorus var. aureus Clemens 1977-4-16 CLEMENS 17 Colusa Moderate population, salt creek canyon, n side of salt creek, hwy 20, 10 mi w-sw of williams. Wilbur springs quad, t.15n, r.4w, sec.32, 15 ft e central border. Open bank along roadside. 143 Comment
  SEINET12161687  Lupinus densiflorus var. aureus Unknown 1977-1 20 Colusa ca 10 m N of Salt Creek, Salt Canyon, Hwy 20, 16kmWSW of Williams. WilburSpringsQuad. seebelow 143 Comment
  SEINET9296972  Lupinus densiflorus var. densiflorus Unknown 2009-5-20 14736 Colusa Glasscock Mountain Comment
  RSA424726  Lupinus densiflorus var. palustris Aaron Liston, M. Blumler 1987-4-26 668 -1 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CAS-BOT-BC8379  Lupinus formosus var. robustus Amos Arthur Heller 1940-4-21 15543 Colusa US Hwy 99W, 2 miles S of Williams Comment
  UC1299680  Lupinus luteolus Freed W. Hoffman 1949-9-25 3151 Colusa Bear Valley; North Coast Ranges, Bear Valley Comment
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  OBI71991  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Rd to Goat Mt Lookout 0.4 mi S of Rt M-10 (Bear Crk-Fouts Spring Rd) at head of S Fk Stony Crk, ca 12 airmiles WSW of Stonyford; T17N R8W 1372 Comment
  RSA716572  Lupinus microcarpus D. Isle 1995-4-27 403 Colusa East Park Reservoir Rd. at N edge just at rt. angle turn, w. of cattle guard 1/4 mi. 348 Comment
  CDA27487  Lupinus microcarpus var. densiflorus L. Ahart 2003-7-14 10390 Colusa On the east and west sides of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. Comment
  CHSC42238  Lupinus microcarpus var. densiflorus Steve Holloway 1986-4-5 4 Colusa Salt canyon, s side of Salt Creek, Hwy 20 11 mi wsw of Williams. 143 Comment
  CHSC91128  Lupinus microcarpus var. densiflorus D. Isle 1997-7-31 334 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. S end of Bear Valley Rd. 243 Comment
  UC726766  Lupinus microcarpus var. densiflorus A. A. Heller 1940-5-6 15576 Colusa on steep clay banks along State Hwy #20 about 3 mi e junction with Highway #16 Comment
  UCD57462  Lupinus microcarpus var. densiflorus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3642 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Mouth of Craig Canyon, along unimproved road. 316 Comment
  UC614851  Lupinus microcarpus var. densiflorus Beryl O. Schreiber 1932-4-3 223 Colusa road to Williams; road to Williams Comment
  UCD57053  Lupinus microcarpus var. microcarpus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3641 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UCD64426  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD33935  Lupinus nanus Beecher Crampton 1958-4-21 9166 Colusa 1 mile west of Lodoga. 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
  CHSC90384  Lupinus succulentus Martin Polsan 1988-4-9 16 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 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
  SEINET7096535 Image available Lupinus succulentus Richard R. Halse 2001-3-22 5947 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 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
  HSC89693  Lupinus succulentus William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Colusa Walker Ridge Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  POM276532  Lupinus succulentus Lyman D. Benson 1935-3-27 6336 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  RSA276282  Lupinus vallicola subsp. apricus Lyman D. Benson 1935-3-27 6333 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CDA5761  Lycium barbarum G. D. Barbe 1975-10-23 2091 Colusa 7th and Market Streets, Colusa. 0 Comment
  UCD163325  Lycium barbarum Craig D. Thomsen 1997-4-19 1908 Colusa Wilbur Springs. About 4 miles north of Hwy 20. Vicinity of Blank Spring, about 0.75 miles west of Wilbur Hot Springs hotel, adjacent to Sulphur Creek. 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
  CHSC115003  Lythrum tribracteatum Lowell Ahart 2015-4-28 20113 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  UCD102948  Lythrum tribracteatum H. L. Mason 1945-7-11 12645 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. Comment
  UCD66865  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5068 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  JEPS117019  Lythrum tribracteatum David Gowen 2008-5-24 925 Colusa West of Sites on north side of road. Comment
  RSA0016023  Lythrum tribracteatum Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  JEPS108735  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  CHSC79466  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1106 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 216 Comment
  RSA755624  Madia exigua George K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCD66678  Madia exigua Craig D. Thomsen 2000-5-11 2302 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
  JEPS38333  Madia exigua W. L. Jepson 1938-6-9 18961 Colusa mts. between Indian Valley (Lake Co.) Bear Valley (Colusa Co.) 579 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
  UCD159852  Madia hallii G. Ledyard Stebbins 1985-4-19 C 503 Colusa South end of Walker Ridge, along Walker Ridge Road, 0.25 miles northeast of its junction with road to Indian Valley Dam. (Note by label-maker: Section 12 is farther than 0.25 miles NE of road to Indian Valley Dam. Georeferenced this record in Section 13). 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
  UC725449  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa below the road near the foot of the grade e Lodoga; Sites-Lodoga road Comment
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Sep 25 2006
  UCD81259  Malacothamnus fremontii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5424 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
  UCD82630  Malacothamnus fremontii Jack Alderson 2009-8-6 26 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Southern part of the ranch, just N of confluence of Bear and Cache Creeks. 243 Comment
  UC768593  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek 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
  CAS-BOT-BC347387  Malacothrix floccifera unspecified 1936-4-11 s.n. Colusa Bear Creek Canyon Comment
  CDA11410  Malacothrix floccifera G. F. Hrusa, K. van Katwyk 1995-4-22 12131 Colusa Inner North Coast Ranges; Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC8145  Malacothrix floccifera J. G. Moore 1969-4-12 93 Colusa Hwy 20, 0.5 mi. w of junction with Hwy. 16. 228 Comment
  CHSC86522  Malacothrix floccifera B. Castro; Beth Hendrickson 2003-3-19 1393 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 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
  JEPS16207  Malacothrix floccifera Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3185 Colusa just w Bear Valley (just w of base of the grade to Indian Valley (Bartlett Mt. Grade)); Inner North Coast Ranges 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
  RSA669479  Malva parviflora R. R. Halse 2001-3-22 5945 Colusa Williams; along a vacant lot by 455-4th Street. 18 Comment
  CHSC86831  Malvella leprosa Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Drainage. 103 Comment
  CHSC88532  Malvella leprosa B. Castro; David Grant, Aric Lester 2003-9-29 1443 Colusa Vicinity of Antelope Valley, Antelope Creek and Huffmaster Road. On SSE-facing bank in sharp bend of creek. 160 Comment
  UC573258  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 mi. s. Colusa; Colusa Quad. 15 Comment
  CDA32964  Malvella leprosa Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  RSA121079  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 miles S. of Colusa 15 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
  SEINET11990999  Marah oregana R. A. DeMartile 1983-1 106 Colusa Goat Mountain Rd 914 Comment
  JEPS95245  Marah watsonii Steve Edwards 1996-4-26 Colusa Walker Ridge NE of Barrel Springs, on serpentinite scree visible immediately S of Brim Grade, E of Walker Ridge Road and not far below the latter in elevation Comment
  UC903736  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa less than 1 mi e Colusa-Lake Co. boundary (along Hiway 20) 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
  CHSC118890  Marah watsonii Glenn Keator 1966-4-24 Colusa Junction of Rail Canyon Road and Sites-Lodoga Road. Comment
  POM174574  Marah watsonii Roxana S. Ferris 1926-4-23 6593 Colusa On Grapevine Grade; Stonyford-Sites Road. 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
  UC89518  Matricaria discoidea T. S. Brandegee April 1889 Colusa Colusa Junction Comment
  UCD107748  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Slopes of Little Stoney Creek, Mendocino National Forest. Inner north coast ranges. 762 Comment
  UCD72532  Medicago minima Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3823 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
  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
  SEINET255529  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCR206895  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UCR205147  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD107923  Medicago sativa Beecher Crampton 1963-8-5 6872 Colusa 3.5 miles south of Grimes. 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
  CHSC100245  Melica harfordii D. Isle 1988-4-13 1508 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
  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
  UCD63920  Melica torreyana Craig D. Thomsen 2001-5-24 2510 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCD88843  Melica torreyana Beecher Crampton 1958-5-19 4816 Colusa West of Lodoga. Comment
  CHSC94289  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
  JEPS80116  Mentzelia dispersa L. R. Heckard with J. Hickman 1980-7-1 5274 Colusa Flat at summit of East Peak. Snow Mt.; Colusa-Lake County Boundary 2148 Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  UC1051549  Mentzelia laevicaulis var. laevicaulis Helen K. Sharsmith 1953-6-21 4306 Colusa ca 1 mi within boundary of Mendocino National Forest (Slopes of Little Stoney Creek); Inner North Coast Ranges 670 Comment
  UCD163868  Micranthes californica Craig D. Thomsen 2001-4-12 2465 Colusa Bear Creek Canyon, first tributary above Sulphur Creek confluence with Bear Creek. About 3 miles north of Hwy 20. Comment
  CAS-BOT-BC479709  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 N of intersection with East Ruby King Rd 428 Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 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
  CHSC79254  Micropus californicus var. californicus B. Castro; L. P. Janeway 2000-4-10 1065 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 106 Comment
  UCD82822  Micropus californicus var. californicus Craig Thomsen; G. Harrington 2009-5-12 2844 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  JEPS120972  Microseris douglasii Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18628 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
  CHSC70968  Microseris douglasii subsp. douglasii Vernon Oswald; Lowell Ahart 1998-5-7 8999 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
  CHSC86872  Microseris douglasii subsp. douglasii B. Castro 2003-4-3 1413 Colusa Vicinity of Sites, Golden Gate, and Funks Ck. 82 Comment
  UCD56919  Microseris douglasii subsp. tenella Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3522 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 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
  JEPS94209  Microseris sylvatica Vernon Oswald and Lowell Ahart 1998-5-7 8991 Colusa Lodoga-Leesville Road 4.3 mi s of Cooks Springs Road; Lodoga-Leesville Road 469 Comment
  UCD143422  Microsteris gracilis Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. 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
  CHSC94312  Mimetanthe pilosa Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  CHSC94497  Mimetanthe pilosa Lowell Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SBBG119885  Mimetanthe pilosa L. Ahart 2006-8-9 13113 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  JEPS73486  Mimulus L. R. Heckard 1972-7-9 3098 Colusa se slope East Peak; Snow Mt. 2072 Comment
  JEPS86644  Mimulus arvensis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6715 Colusa 0.5 mi w Summit Springs (sw flank of mountain); Snow Mountain, Colusa-Lake County line Comment
  UCD82625  Mimulus bolanderi Craig Thomsen; G. Harrington 2009-5-12 2895 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. About 200 yds.south off spur road, south-facing hillslope above ravine and spring area. 813 Comment
  POM21052  Mimulus cardinalis Roxana Stinchfield 1916-7-9 417 Colusa Philip's Ranch, near Sycamore. Comment
  RSA535823  Mimulus douglasii David M. Thompson 1988-3-28 860 Colusa 2.0 mi W of Bear Valley Road along Bartlett Springs Road. 0.25 mi W of a road culvert for a small stream. 534 Comment
  UCD122617  Mimulus douglasii Delanne Belshaw 1975-4-20 11 Colusa Bear Valley Road, 7.8 miles north of junction of State Highways 20 and 16. Comment
  JEPS80762  Mimulus floribundus L. R. Heckard and J. C. Hickman 1981-7-30 5729 Colusa crossing Trout Creek (se side of mt.); Snow Mt. 1828 Comment
  CDA41790  Mimulus guttatus L. Ahart 2003-7-14 10383 Colusa On the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. Comment
  JEPS121117  Mimulus guttatus Lowell Ahart 2013-5-1 18688 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
  RSA0118612  Mimulus guttatus Lowell Ahart 2013-5-1 18688 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
  UCD64424  Mimulus guttatus Craig D. Thomsen 2000-4-28 2187 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
  UCD82504  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2864 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UC1212581  Mimulus layneae Francia Chisaki, Helen K. Sharsmith 1959-5-27 1338 Colusa about 1/4 mi e Cooks Spring; Inner North Coast Ranges, Cooks Creek Comment
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Nov 19 2007
  UC971992  Mimulus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  RSA114162  Mimulus layneae H. K. Sharsmith 1953-6-20 4290 Colusa 5 miles beyond Trough Springs on road to Goat Mountain, Mendocino National Forest. 1280 Comment
  JEPS104385  Mimulus microphyllus Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  UC1191131  Mimulus microphyllus Herbert L. Mason 1953-5-5 14519 Colusa 0.25 above junction of Little Stoney Creek and Trout Creek (at sharp bend in road); Little Stoney Creek drainage Comment
  UC726324  Mimulus microphyllus A. A. Heller 1940-5-14 15619 Colusa 4 mi n Maxwell Comment
  UCD122648  Mimulus microphyllus R. A. Christison 1960-4-17 28 Colusa on road to Wilbur Springs, 2 miles north of State Highway 20. Comment
  HSC96797  Mimulus nudatus L. Ahart 2006-6-11 12663 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
  RSA296392  Mimulus nudatus Robert F. Hoover 1941-5-2 4982 Colusa Just east (about 6 miles S of Wilbur Springs) of Lake Co. line on Williams-Clear Lake Hwy Comment
  UC1334723  Mimulus nudatus Eugene Memmler 1969-5-8 101 Colusa ca. 1 mi e Lake County line (along State Hwy 20 from Williams); Bear Creek 457 Comment
  UCD66858  Mimulus nudatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5061 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Destinella Flat. Serpentine meadow on the east side of main drainage. 554 Comment
  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
  JEPS60201  Mimulus rattanii L. R. Heckard 1969-5-29 2237 Colusa about 6 1/2 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  UC1614402  Minuartia cismontana Charles M. Belshaw 1937-4-25 2833 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  HSC45718  Minuartia douglasii Sheila Logan 1978-4-22 59 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD57309  Minuartia douglasii Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3680 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
  UCD15429  Minuartia douglasii Margit Sands 1985-4-13 33 Colusa in Bear Valley, 7.4 miles north of Wilbur Hot Springs rd., a quarter of a mile form the west side of the road; 396 Comment
  CHSC91050  Minuartia nuttallii subsp. gregaria D. Isle 2003-6-12 362 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt.--meadow 1/4 mi. below road N80 E from jct. of Rd. to Goat Mt. lookout and Horse Glade Rd. GPS: 10S 0524032E 4346780N. 1645 Comment
  JEPS81413  Minuartia nuttallii subsp. gregaria L. R. Heckard and J. C. Hickman 1982-7-9 6021 Colusa just e Lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 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
  CAS-BOT-BC229599  Mirabilis greenei Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N of San Francisco Bay. Flood-bed of Stony Creek Comment
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  CHSC64094  Monardella glauca David Isle 1992-8-3 Colusa Snow Mountain. Comment
  JEPS80272  Monardella odoratissima subsp. glauca L. R. Heckard and J. Hickman 1980-9-16 5455 Colusa East of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  CAS-BOT-BC220675  Monardella villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CHSC83196  Monardella villosa D. Sanchez-Mata 1996-6-27 Colusa Williams. Blue Ridge. In Bear Creek. Comment
  UCD80833  Monardella villosa Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5290 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Canyon to the north of Brophy Canyon, ca. 100 ft from entrance at Bear Creek. 233 Comment
  CHSC48492  Monardella villosa subsp. villosa Vernon Oswald 1986-6-30 2172 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306, 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  RSA781217  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4991 Colusa Mendocino National Forest, east face of Snow Mountain, Stony Creek along M10 610 Comment
  UCR261722  Monardella villosa subsp. villosa Ann Howald 2003-5-30 2356 A 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
  CAS-BOT-BC349575  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 426 Comment
  CAS-BOT-BC349577  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 426 Comment
  UC618924  Monolopia major R. F. Hoover 1938-4-24 3223 Colusa Venado 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
  UC90430  Monolopia major K. Brandegee April 1889 Colusa Comment
  UCD50183  Muhlenbergia andina Craig D. Thomsen; Art Shapiro 2004-9-16 s. n. Colusa In large patch in roadcut along Goat Mountain Road, Colusa County. Comment
  CAS-BOT-BC83274  Myosurus minimus Herbert L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  UC1101350  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa 3 mi e of Maxwell Comment
  UCD18836  Myosurus minimus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 143 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
  CAS-BOT-BC83280  Myosurus minimus Alice Eastwood 1922-4-24 11188 Colusa Road between Princeton and Norman. Colusa/Glenn county line. Comment
  UC1028302  Myosurus sessilis George B. Rossbach 1955-4-9 271 Colusa 3 mi e Maxwell (Sacramento Valley); Sacramento Valley 18 Comment
  UC1738124  Myosurus sessilis D. E. Stone 1956-10-9 1- 8 -1 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) 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
  CHSC117595  Myriophyllum spicatum B. Castro; D. Bogener, A Lyons 2007-11-13 1684 Colusa Sacramento Valley. Vicinity of Golden Gate on E side of Logan Ridge, at SE corner of Funks Reservoir, within surrounding grassland. 60 Comment
  UCD81889  Najas gracillima Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5773 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  UC1146671  Nassella cernua Freed W. Hoffman 1944-7-13 1957 Colusa between Indian Valley and Bear Valley; North Coast Ranges Comment
  UCD57618  Nassella pulchra Jill Poloske; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Near the intersection of Thompson Canyon and Craig Canyon. West of spring, the headwaters of Craig Creek. 365 Comment
  UCD87673  Nassella pulchra D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 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
  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
  UCD48445  Navarretia heterandra Collector unknown 1946-5-30 s.n. Colusa Colusa Co. Comment
  JEPS104075  Navarretia jepsonii Lowell Ahart 2003-7-14 10385 Colusa Field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD36308  Navarretia jepsonii Beecher Crampton 1949-9-25 494 F Colusa Colusa County, 18 miles east of Bartlett Springs. Comment
  UCD61473  Navarretia jepsonii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3919 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  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
  UCR261670  Navarretia jepsonii Ann Howald 2003-5-29 2346 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  CHSC94469  Navarretia leptalea subsp. leptalea Lowell Ahart 2006-8-9 13128 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC230340  Navarretia leucocephala subsp. bakeri Roxana Stinchfield 1916-6-17 290 Colusa Near College City Comment
  CHSC112918  Navarretia nigelliformis subsp. nigelliformis B. Castro; Robin Carter, Amy Lyons 2010-5-13 1807 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 121 Comment
  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
  CAS-BOT-BC230054  Navarretia pubescens Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5646 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
  UC584174  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 mi w Williams (on Bartlett Springs road) Comment
  UC726846  Navarretia viscidula A. A. Heller 1940-6-7 15812 Colusa 3 mi s Stonyford Comment
  JEPS80750  Nemacladus capillaris L. R. Heckard and J. C. Hickman 1981-7-29 5713 Colusa n of Summit Springs (n of road, s side of Snow Mt, Colusa-Lake county boundary); Snow Mt. 1539 Comment
  RSA537450  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  SEINET10464797  Nemacladus capillaris Rattan 1884-1 RATTAN s.n. Colusa Above Stony Creek 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
  SEINET7856709  Nemophila heterophylla R. R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCD66598  Nemophila heterophylla Craig D. Thomsen 2000-4-28 2256 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
  JEPS3136  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  HSC87763  Nemophila menziesii Stephen Westergaard 1967-4-29 12 Colusa Bear Valley, 5 mi. N of Hwy. 20 91 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
  UCD66962  Nemophila parviflora Ellen Dean; Davis Botanical Society 2008-5-31 5006 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  RSA537462  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 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
  UC1586079  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  CHSC62938  Nemophila pedunculata Vernon H. Oswald; Lowell Ahart 1994-4-6 6076 Colusa Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford. 548 Comment
  HSC66134  Nemophila pedunculata C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 42 Colusa On Bartlett Springs Rd. at stream crossing Comment
  JEPS80381  Nemophila pedunculata L. R. Heckard and J. Hickman 1981-6-22 5614 Colusa along Dark Hollow Creek (Big Meadow, Snow Mt.); Snow Mt., , Big Meadow 1889 Comment
  UC638658  Nemophila pedunculata Ethel Crum 1938-5-8 2025 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD162986  Nemophila pedunculata Craig D. Thomsen 2002-4-4 2588 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
  UC38962 Image available Neostapfia colusana J. Burtt Davy 1898-5-26 Colusa near Princeton; ; Princeton, Colusa Co. Comment
  RSA0000499  Neostapfia colusana Jos Burtt Davy 1898-05 s.n. Colusa Near Princeton. Comment
  UC71879  Nicotiana acuminata var. multiflora H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CAS-BOT-BC231531  Nicotiana glauca John Thomas Howell 1944-7-18 19841 Colusa East side of Coast Ranges west of Williams Comment
  CAS-BOT-BC231532  Nicotiana glauca J. H. Thomas 1960-8-29 8846 Colusa About 11 miles SW of Williams along highway 20 Comment
  JEPS87759  Nicotiana glauca Vernon H. Oswald and Lowell Ahart 1994-3-23 6024 Colusa 1.8 mi w Stonyford-Lodoga Rd. (Goat Mtn Rd, s of Stonyford, between the road and Little Stony Creek) 487 Comment
  SEINET11587905  Nicotiana glauca Unknown 2009-3-11 14379 Colusa Williams 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
  UC34994  Nicotiana quadrivalvis J. Burtt Davy May 1898 4304 Colusa near Princetown Comment
  CAS-BOT-BC400054  Nuphar polysepala F. P. Cronemiller 1924-6-26 892 Colusa Upper Letts Swamp 1371 Comment
  CHSC71441  Orobanche californica subsp. jepsonii Vernon H. Oswald; Lowell Ahart 1998-7-15 9274 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. Along the edge of a meadow. 524 Comment
  UC71766 Image available Orobanche californica subsp. jepsonii H. P. Chandler Oct 1905 Colusa Princeton. Comment
  UCD163335  Orobanche fasciculata Craig D. Thomsen 2009-5-3 2806 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  SEINET10549723  Orthocarpus purpurascens Houseman 1984-4-28 HOUSEMAN 11 Colusa T15n, r5w, s7. Sw 1/4, 2.9 m w of leesville lodoga junction, brim rd in bear Valley. Collected in moist, open, grassy meadow. Growing with layia, Convolvulus, and lupinus. Flowers pale purple. 418 Comment
  UCD40885  Orthocarpus purpurascens Richard Schulhof 1984-4-21 6 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 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
  JEPS105741  Packera clevelandii David Gowen 2004-6-24 134 Colusa South of Stonyford. Approx. 1.8 miles along Goat Mt. Road from its junction with the paved road to Stonyford. Comment
  JEPS95998  Packera clevelandii Vernon H. Oswald and L. Ahart 1999-6-22 9783 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  UCD110420  Packera clevelandii Daniel Slakey; CNPS volunteers 2011-6-12 6 Colusa Walker Ridge. Wet meadow area on E side of Walker Ridge Rd. About 18 km N of Hwy.20 by road. 876 Comment
  UCD133496  Packera clevelandii 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
  UCD163327  Packera eurycephala Craig D. Thomsen 2009-5-3 2792 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CAS-BOT-BC231236  Packera eurycephala var. eurycephala Roxana Stinchfield Ferris 1926-4-23 6454 Colusa Stonyford. Comment
  UC91676  Packera eurycephala var. eurycephala Brandegee May 1887 Colusa Epperson's Comment
  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
  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
  UCD89786  Panicum capillare subsp. hillmanii Beecher Crampton 1969-6-18 8457 Colusa 1.5 miles south of Williams. Interstate Hwy. 5 northbound. Comment
  CAS-BOT-BC253937  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa Along US Highway 99W, 4 miles S of Maxwell Comment
  CHSC86779  Parapholis incurva 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
  UCR119180  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa Sacramento Valley, 2 miles east of Maxwell 91 Comment
  UC1613494  Parvisedum pumilum Charles M. Belshaw 1937-4-25 2851 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  CHSC94712  Paspalum distichum Lowell Ahart 2006-9-26 13352 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  UCR225658A  Paspalum distichum Craig D. Thomsen, Gordon Harrington 2008-7-6 2780 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  UC766200  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  CHSC77918  Pectocarya pusilla Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  UCR261665  Pectocarya setosa Ann Howald 2003-5-5 2329 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 0.25 mile west of intersection with Lodoga-Stonyford Road 394 Comment
  UCD110808  Pedicularis densiflora Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  RSA401941B  Pedicularis densiflora Terry Roth 1979-4-14 9 Colusa [No location data on label] 1067 Comment
  UC1051747  Pediomelum californicum Helen K. Sharsmith 1953-6-21 4304 Colusa ca 1 mi within boundary of Mendocino National Forest (slopes of Little Stoney Creek); Mendocino Nat For, Little Stoney Creek, Inner N Coast Ranges 670 Comment
  UCD161828  Pediomelum californicum James A. Neilson Jr. 1980-6-15 3426 Colusa Wilbur Hot Springs. (Exact location unknown. Coordinates estimated by label maker.) Comment
  HSC94208  Pellaea andromedifolia D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 22 Colusa On Brim Rd. 1.6 mi. W of Jct. with Bear Valley Rd. 488 Comment
  CHSC86960  Pellaea mucronata var. mucronata B. Castro 2003-4-10 1423 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In E-trending small side canyon tributary. 146 Comment
  UCD67126  Penstemon heterophyllus var. azureus Ellen Dean; Davis Botanical Society 2008-5-31 5056 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  CHSC26461  Penstemon heterophyllus var. purdyi L. V. Ritter 1969-4-30 224 Colusa Ca. 10 mi sw of Williams, s side of Hwy. 20. Comment
  CHSC84198  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  NY601769  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Above Salt Creek, Lower Lake-Williams road, 11 miles northeast of Lake-Colusa line, Inner North Coast Ranges. 152.4 Comment
  CDA20255  Penstemon heterophyllus var. purdyi G. D. Barbe, Nola Parmer 1982-6-4 3636 B Colusa North Coast Ranges; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  NY601740  Penstemon heterophyllus var. purdyi C. C. Freeman 1983-5-22 1891 Colusa CA 20, 2.2 miles north-northeast of the junction of CA 20 & 16 in the foothills of the Sierra Cascades. Comment
  UC76098  Penstemon heterophyllus var. purdyi Miss M. Alice King 1905-1 Colusa near College City (hills beyond Arbuckle); Sacramento Valley, near College City, Arbuckle Comment
  CDA8447  Pentachaeta exilis N. van Kleeck, Willa May Lowary 1970-4-18 Colusa Bear Valley, just south of Ladoga. 0 Comment
  UC1532348  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near the Lily Pond and Letts Lake. 1188 Comment
  UCD63109  Perideridia kelloggii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4940 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  UCSB4567  Perideridia kelloggii Keator, Glenn 1958-6-16 Colusa Alogn road from Lower Lake to Sacramento valley just east of the Lake-Colusa county line 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
  CHSC112625  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCD99460  Persicaria lapathifolia H. R. Drever 1945-8-24 s.n. Colusa Near Grimes. Comment
  HSC47736  Petrorhagia dubia Thomas W. Nelson, Jane P. Nelson 1978-4-29 3942 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CDA16098  Phacelia corymbosa G. F. Hrusa 1999-5-16 15045 Colusa North Coast Ranges; Above Fouts Springs. 594 Comment
  JEPS73516  Phacelia corymbosa L. R. Heckard 1972-7-10 3134 Colusa w Trout Creek; Snow Mt. 1828 Comment
  CHSC108152  Phacelia distans David Isle 2008-4-9 1934 Colusa Sacramento River Watershed. Reese Place Duck Club (4498 2 Mile Rd); ~ 4 mi. NE of Maxwell. 30 Comment
  CHSC62845  Phacelia distans Vernon H. Oswald; Lowell Ahart 1994-3-23 6021 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Locally common in gravelly serpentine soil on the bank between the road and Little Stony Creek. 505 Comment
  UCR212377  Phacelia divaricata Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek 358 Comment
  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
  UC73693  Phacelia egena Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UC1613497  Phacelia imbricata Charles M. Belshaw 1937-4-25 2892 Colusa vicinity of Cook's Spring Inner North Coast Range, Devil's Ridge Comment
  UCD57821  Phacelia imbricata Gordon Harrington 2007-4-17 32 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 552 Comment
  SEINET5520514  Phacelia imbricata subsp. imbricata R. R. Halse 2010-3-25 7850 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  UC901839  Phacelia imbricata subsp. imbricata L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3322 Colusa ridge between Bear Valley and Indian Valley (near Colusa-Lake Co. line) 609 Comment
  UCR233444  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 miles southeast of Sites 93 Comment
  JEPS1305  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon 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
  UCD67073  Phalaris aquatica Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5100 Colusa BLM Payne Ranch, lands to the SW of jct 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
  UCD88035  Phalaris aquatica Beecher Crampton 1963-8-5 6869 Colusa 1/4 mile E of Cortena. Comment
  CAS-BOT-BC259027  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 Colusa 4 miles east of Williams Comment
  POM163470  Phalaris lemmonii Roxana S. Ferris 1926-4-21 6282 Colusa 3 mi W of Colusa.. Comment
  SEINET10660257  Phalaris lemmonii Roxana S. Ferris 1917-4-12 Ferris 547 Colusa 4 miles east of Williams; Alkali Plains Comment
  CAS-BOT-BC265956  Phalaris minor Roxana S. Ferris 1917-4-12 508 Colusa 4 miles east of Williams Comment
  SEINET10657421  Phalaris minor Roxana S. Ferris 1917-4-12 Ferris 508 Colusa 4 mi. east of Williams; Alkali Plains Comment
  CHSC85974  Phalaris paradoxa Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  POM207817  Phalaris paradoxa Jos Burtt Davy 1898-05 s.n. Colusa Near Princeton. Comment
  UC50462  Phalaris paradoxa J. Burtt Davy May, 1898 4264 Colusa near Princeton; near Princeton Comment
  UCD63034  Phalaris paradoxa Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4880 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Across Bear Creek from Cowboy Camp. 323 Comment
  UCD66454  Phalaris paradoxa Craig D. Thomsen 2000-5-12 2322 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
  UCR206810  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-17 14389 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  HSC103841  Phoradendron bolleanum G. Fred Hrusa, K. van Katwyk 1995-4-22 12109 Colusa North end of Walker Ridge, ~1 mi. south of intersection with Bartlett Springs Rd. Parasite on Cupressus macnabiana 1000 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
  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-BC135299  Phoradendron serotinum subsp. macrophyllum Roxana S. Ferris 1917-4-15 623 Colusa Sycamore. Sycamore Slough Comment
  CAS-BOT-BC135298  Phoradendron serotinum subsp. macrophyllum Roxana Stinchfield 1918-7-12 461 Colusa Sycamore Slough, Stinchfield Ranch Comment
  UCD80895  Phragmites australis Jack Alderson; C. Thomsen 2009-3-18 24 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Headwaters of Craig Canyon. 527 Comment
  CDA5824  Physalis lancifolia Cowley Jul 1931 Colusa West of Colusa. 0 Comment
  CDA37576  Phytolacca americana J. D. 2000-4-28 PDR 019976 Colusa Zumwalt Lane, Williams. 0 Comment
  UCD80817  Pickeringia montana Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5273 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. E-facing slope above Eula Canyon. Between the headwater areas of Craig and Eula Canyons. 528 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
  UC1051745  Pickeringia montana var. montana Helen K. Sharsmith 1953-6-20 4301 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CHSC105196  Pinus attenuata B. Castro; L. P. Janeway 1999-7-5 1010 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along Lovelady Ridge rd ca 0.35 mi N of its jcn with USFS Rd 16N06, near top of Pacific Ridge. 1097 Comment
  UCD57447  Pinus sabiniana Gina Darin; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  UCD165933  Piperia leptopetala Ellen Dean; with Tom Starbuck 2016-4-24 8844 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  JEPS110173  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCR225461  Piptatherum miliaceum Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5115 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail 548 Comment
  CHSC107949  Pisum sativum B. Castro; T. Boullion 2011-4-20 1847 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 0.3 mi east of bend in Tehama-Colusa Canal. In grassy uplands north of large +- saline/alkaline wetland/marsh and associated vernal swales, just south of east-west fence bordering grain fields. 49 Comment
  CAS-BOT-BC169840  Plagiobothrys Alice M. King 1905-1-1 s.n. Colusa near College City. Sacramento Valley Comment
  CAS-BOT-BC227984  Plagiobothrys Doris K. Kildale 1928-5-8 5016 Colusa 3 miles S of Arbucle [Arbuckle] Comment
  UCR206385  Plagiobothrys George K. Helmkamp, E. A. Helmkamp 2009-5-20 14751 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC89829  Plagiobothrys austiniae B. Castro; S. Innecken 2001-3-20 1215 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 Comment
  UCD57876  Plagiobothrys bracteatus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 53 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD120813  Plagiobothrys canescens Alpaslun Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Comment
  CHSC79099  Plagiobothrys fulvus B. Castro 2000-3-17 1040 Colusa Vicinity of Sites, Antelope Valley, and Huffmaster Rd. 182 Comment
  CHSC81232  Plagiobothrys greenei Jenny Marr; Heidi West, Caroline Warren 1998-4-16 Colusa Vicinity of Grapevine Creek and Antelope Valley. 134 Comment
  CHSC31260  Plagiobothrys humistratus R. A. Schlising; K. R. Stern 1980-5-5 3586 Colusa NW of Colusa; Delevan National Wildlife Refuge; about 1.4 mi south of north margin of refuge. Comment
  UC78155 Image available Plagiobothrys humistratus Katharine Brandegee 1888-4 Colusa Colusa Junction Comment
  UCD18843  Plagiobothrys leptocladus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 151 A Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  JEPS80194  Plagiobothrys nothofulvus L. R. Heckard and J. Hickman 1980-7-3 5347 Colusa ca 10 mi w Stonyford (just w of Summit Springs, sw of Snow Mt., Colusa-Lake County boundary) 1548 Comment
  POM163465  Plagiobothrys nothofulvus Roxana S. Ferris 1926-4-23 6418 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  CHSC114995  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-28 20115 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC52671  Plagiobothrys stipitatus var. micranthus James Jokerst 1986-5-6 2304 Colusa Near Lurline Creek. Vernal pool. 41 Comment
  UCD18900  Plagiobothrys stipitatus var. micranthus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-17 151 B Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587286; 4336302. Comment
  UCD66938  Plagiobothrys stipitatus var. micranthus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5087 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCR212317  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2096 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CHSC86873  Plagiobothrys stipitatus var. stipitatus B. Castro; Beth Hendrickson 2003-4-7 1416 Colusa Vicinity of Sites, Antelope Valley, and Salt Lake. 94 Comment
  UCR212375  Plagiobothrys stipitatus var. stipitatus Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  CAS-BOT-BC60834  Planodes virginica Doris K. Kildale 1928-5-8 5017 Colusa 3 miles south of Arbuckle. Comment
  CHSC79538  Plantago coronopus L. P. Janeway; B. Castro 2000-3-23 6637 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CHSC89837  Plantago coronopus B. Castro; L. Janeway, S. Innecken 2001-5-9 1252 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Andys Canyon. Near dirt road paralleling N-S-trending perennial creek. 367 Comment
  UCSC009428  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell 53 Comment
  CHSC115396  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC86027  Plantago erecta Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. Pasture. 121 Comment
  JEPS124211  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  UCD64271  Plantago erecta Craig D. Thomsen 2000-3-31 2067 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  HSC16823  Plantago erecta M. Dole 1963-4-15 71 Colusa 1 mi. S of the junction of Hwys. 16 and 20, on Hwy. 16 Comment
  HSC85854  Plantago erecta Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  UCD14370  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
  CHSC113049  Plantago major Lowell Ahart 2013-10-1 19094 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
  CHSC94449  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110111  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724960  Plantago major L. Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC93146  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Sycamore Slough. Stinchfield Ranch. Comment
  POM142384  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Stinchfield Ranch, along Sycamore Slough Comment
  CHSC27552  Platystemon californicus Scott E. Patton 1978-4-9 9 Colusa Ca. 0.3 m w of jct of Hwys 20 and 16, s side of Bear Creek, ca 18 sw of Williams. 321 Comment
  SEINET3124160 Image available Platystemon californicus Sandra Wainwright 1969-4-13 1 Colusa Bear Valley, 9.5 miles north of State Highway 20 Comment
  UC72707  Platystemon californicus Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  CAS-BOT-BC91595  Platystemon californicus Mrs. Brandegee 1889-4-1 s.n. Colusa Unspecified. 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
  UCD22719  Platystemon californicus Nancy Vucinich 1978-4-8 6 Colusa Bear Valley. 10.3 miles(by road) north of the junction of Hwys 16 and 20. 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
  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
  JEPS87663  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  UC1613289  Plectritis ciliosa subsp. ciliosa Charles M. Belshaw 1937-4-25 2848 Colusa vicinity of Cook's Spring, Devil's Ridge; Inner N. Coast Range Comment
  UC999837  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 711 Colusa Colusa County Comment
  JEPS81274  Plectritis congesta L. R. Heckard and J. C. Hickman 1982-7-5 5884 Colusa below (south of) Summit Spring (s side of Snow Mountain); Snow Mountain 1500 Comment
  CDA32826  Plectritis congesta subsp. brachystemon P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC999826  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 693 Colusa near Williams Comment
  UCD67594  Plectritis macrocera Charles Martin 1986-5-17 33 Colusa Mendocino National Forest, along Forest Rd. 17NO2, 3.2 miles south of junction with Forest service road 18NO1, Mill Valley campground. In wet meadow, growing in moist soil. Herb, ca. 1ft tall. Small purple flowers in a head, ca. 1 ft tall. Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) 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
  UCD57879  Poa bulbosa Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 54 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD64291  Poa secunda Craig D. Thomsen 2000-4-12 2130 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
  CHSC77408  Poa secunda subsp. secunda Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC8244  Poa secunda subsp. secunda J. G. Moore 1969-4-12 2 Colusa Hwy 20, 15 mi. w of Williams on n and s sides of road. 106 Comment
  JEPS81341  Poa secunda subsp. secunda L. R. Heckard with J. Hickman 1982-7-6 5954 Colusa West Peak Snow Mt 2103 Comment
  UCD90806  Poa secunda subsp. secunda Beecher Crampton 1958-4-21 4729 Colusa Southwestern Colusa County. 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  UCD90886  Poa secunda subsp. secunda John R. Davey 1967-12-2 90 Colusa Border, ca. 5-6 miles WSW of Leesville, Bartlett Springs Road N of Baldy Mountain. 609 Comment
  UC883695  Pogogyne douglasii A. A. Heller 1916-6-9 12387 Colusa Coast Range about 2 miles west of Leesville Comment
  JEPS62433  Pogogyne douglasii W. L. Jepson 1920-5-23 8966 Colusa near Leesville, foot of Bartlett grade, west side of Bear Valley, w Colusa Co. Comment
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  CAS-BOT-BC413966  Polygonum aviculare subsp. aviculare Karl H. Rechinger 1953-4-11 s.n. Colusa 3 miles east of Maxwell Comment
  JEPS80165  Polygonum polygaloides subsp. kelloggii L. R. Heckard and J. Hickman 1980-7-2 5316 Colusa ne Snow Mtn. peaks (ca 10 mi w of Stonyford); Upper Milk Ranch Meadow 1920 Comment
  RSA724952  Polygonum punctatum L. Ahart 2006-8-9 13133 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CDA43071  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 Colusa Sacramento Valley.; Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Comment
  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
  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
  UCD18842  Polypogon monspeliensis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 149 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCD61444  Polypogon monspeliensis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3889 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  SBBG119883  Polypogon viridis L. Ahart 2006-8-9 13159 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  CAS-BOT-BC102381  Populus fremontii Roxana S. Ferris 1917-4-17 624 Colusa Sycamore, Sycamore Slough Comment
  HSC59137  Populus fremontii subsp. fremontii Terry Roth 1979-5-7 41 Colusa Where Hwy. 20 enters Salt Canyon along Salt Creek 122 Comment
  UCD83719  Populus fremontii subsp. fremontii Joseph Schlottman; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  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
  UCD35976  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E Cortena. Comment
  CHSC46886  Potamogeton pusillus var. tenuissimus Vernon Oswald 1989-9-12 4006 Colusa Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. On the edge of the lake. 1365 Comment
  UC1607563  Potentilla drummondii Barbara Ertter with Elizabeth Neese 1989-7-2 8627 Colusa ca. 11 air mi due w Stonyford (Long Glade s of Milk Ranch just w of Snow Mt. West); just w Snow Mt. West 1956 Comment
  JEPS8022  Proboscidea louisianica subsp. louisianica Rimo Bacigalupi with L. R. Heckard 1951-8-6 3471 Colusa 4.6 mi nw Sites (along road between Sites and Lodoga) 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
  CAS-BOT-BC159894  Prunus emarginata Leah D. McKee 1881-5-3 036 Colusa Mill Valley Campgrounds, near bridge on [Lodga] Lodoga 1219 Comment
  CHSC94739  Pseudognaphalium californicum Lowell Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  JEPS108724  Pseudognaphalium californicum Lowell Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  UCD67072  Pseudognaphalium californicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the SW of jct 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. 494 Comment
  JEPS18022  Psilocarphus brevissimus var. brevissimus George B. Rossbach 1955-4-9 558 Colusa 3 mi e Maxwell; Sacramento Valley 18 Comment
  JEPS40460  Psilocarphus brevissimus var. brevissimus W. L. Jepson 1934-5-3 16598 Colusa College City Comment
  UC1178819  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1953-4-5 14507 Colusa about 3 mi e Maxwell (near bend in road by bench mark) Comment
  CHSC115395  Psilocarphus oregonus Lowell Ahart 2015-4-10 20008 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC60658  Psilocarphus oregonus Vernon H. Oswald 1993-4-14 5268 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. On top of a levee road branching off of the S leg of the tour route. 18 Comment
  UC1601291  Psilocarphus oregonus T. S. Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC1601294  Psilocarphus oregonus T. S. Brandegee Colusa Williams Comment
  CAS-BOT-BC361876  Psilocarphus tenellus Roxana S. Ferris 1917-4-12 526 Colusa 4 miles east of Williams Comment
  UC71968  Psilocarphus tenellus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD163706  Psilocarphus tenellus Craig Thomsen 1999-5-10 2018 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD57867  Psilocarphus tenellus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 50 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD58125  Psilocarphus tenellus Ellen Dean; PLB 102 Class 2007-4-29 3721 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
  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
  CHSC62847  Pterostegia drymarioides Vernon H. Oswald; Lowell Ahart 1994-3-23 6018 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Growing at the base of an outcropping of serpentine. 505 Comment
  CHSC79550  Pterostegia drymarioides B. Castro; L. P. Janeway 2000-5-2 1120 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  JEPS89241  Purshia tridentata var. tridentata L. R. Heckard and J. C. Hickman 1981-7-30 5775 Colusa about 1.7 km e (air mi) Snow Mt., West Peak (at e summit of ridge running e of West Peak); Snow Mt. 2042 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
  RSA0080624  Pyrola dentata Barbara Ertter 1989-7-1 8593 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  JEPS75762  Quercus L. R. Heckard, and R. Bacigalupi 1976-9-6 4451 Colusa Fouts Camp-Summit Spring trail Snow Mt. 1584 Comment
  UCD144417  Quercus chrysolepis G. F. Hrusa 1998-10-28 14897 Colusa Inner North Coast Ranges. Above Fouts Springs. Through Springs Road mile 2.7. 750 Comment
  CAS-BOT-BC86602  Quercus douglasii Roxana Stinchfield 1916-6-18 302 Colusa near College City Comment
  CAS-BOT-BC86603  Quercus douglasii Roxana S. Ferris 1917-4-14 580 Colusa 7 mi W of Arbuckle - Rumsey Road Comment
  UC993118  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993121  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UCD41209  Quercus durata John Snelling 1986-5-17 3 - Colusa 5.7 mi. west of Stoneyford along Fouts Spring Road. 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
  UCD84510  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6061 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CHSC105193  Quercus durata var. durata B. Castro; L. P. Janeway 1999-7-5 1016 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  HSC71306  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4620 Colusa Along Stony Creek below Digger Pine Campground Comment
  HSC71309  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4617 Colusa Along Stony Creek below Digger Pine Campground Comment
  UC1299701  Quercus garryana Freed W. Hoffman 1948-6-26 2517 Colusa n side Goat Mt. (near forks of Stonyford and Goat Mt. roads, w Colusa County) 1653 Comment
  CHSC92580  Quercus garryana var. breweri D. Isle 2005-7-14 1154 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Board Camp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  RSA758621  Quercus lobata George K. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UC1179011  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Sink, Butte Creek Comment
  UCR205170  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14251 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  RSA623529  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  UCR255069  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa North Coast Range, across Sulphur Creek from Wilbur Springs 412 Comment
  JEPS73455  Quercus vacciniifolia L. R. Heckard 1972-7-8 3056 Colusa se of Snow Mt.; West Peak 1981 Comment
  UCD144336  Quercus wislizeni var. frutescens G. F. Hrusa 1998-11-7 14905 Colusa Inner North Coast Ranges. Above Fouts Springs. Through Springs Road mile 2.7. 750 Comment
  CHSC45699  Rafinesquia californica Vernon Oswald 1986-5-12 2004 Colusa Sites-Lodoga Rd. 0.2 mi w of Grapevine Pass. Roadside. 487 Comment
  UCD159337  Rafinesquia californica D. S. Park; E. Dean 2010-6-5 121 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  UCD66456  Ranunculus arvensis Craig D. Thomsen 2000-5-12 2324 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
  CHSC118888  Ranunculus arvensis David Isle; Ffrank Pendell 2017-5-17 2172 Colusa Foothills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 toFrank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  CAS-BOT-BC378937  Ranunculus californicus var. californicus Roxana Ferris 1926-4-21 6296 Colusa abandoned rice field 2 mi west of Colusa Comment
  CHSC86880  Ranunculus canus B. Castro 2003-4-1 1408 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 146 Comment
  SEINET11587858  Ranunculus canus Unknown 2009-3-11 14373 Colusa Williams 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
  SEINET4208544  Ranunculus canus var. canus Richard R. Halse 2013-3-26 8740 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams.; 0 157 Comment
  CAS-BOT-BC378805  Ranunculus canus var. canus A. A. Heller 1919-5-10 13113 Colusa grade east of Leesville in the oak belt Comment
  CHSC62943  Ranunculus hebecarpus Vernon H. Oswald; Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 463 Comment
  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
  UCD97128  Ranunculus hebecarpus Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6912 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  HSC72770  Ranunculus hebecarpus J. Krajanowski 1981-4-4 2 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  UCD163875  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2453 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  JEPS2828 Image available Rhamnus californica var. crassifolia W. L. Jepson 1920-5-23 8974 Colusa ridge w Bear Valley; ; W of Bear Valley, Colusa Co. Comment
  UC71642  Rhamnus ilicifolia Miss Alice King 1905-1 Colusa College City Comment
  CHSC105169  Rhamnus tomentella subsp. crassifolia B. Castro; L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  CHSC88560  Rhamnus tomentella subsp. crassifolia L. P. Janeway; B. Castro 2001-6-3 7096 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 2.7 km (air) south of Bartlett Springs Road. 799 Comment
  JEPS41964  Rhamnus tomentella subsp. crassifolia W. L. Jepson 1920-5-23 8975 Colusa hills w of Bear Valley (on grade over ridge to Indian Valley) Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  UCR228656  Rhamnus tomentella subsp. crassifolia Ellen Dean, Davis Botanical Society 2008-5-31 4996 Colusa West of Hwy I-5 at Maxwell, along Goat Mountain Road,following Little Stoney Creek, Little Stoney Creek Canyon 414 Comment
  CHSC75707  Rhododendron occidentale Vernon H. Oswald; Lowell Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  UCD117941  Rhododendron occidentale George F. Hrusa 1989-5-5 6066 Colusa Open margin of Little Stony Creek, along Rd. to Cedar Camp. 1.5 m. SW of intersection of Stonyford-Lodoga Rd. 470 Comment
  CAS-BOT-BC170522  Rhus aromatica Roxana S. Ferris 1926-4-23 6590 Colusa Near Stonyford. Comment
  HSC3157  Rhus aromatica C. M. Belshaw 1937-4-25 2813 Colusa Cooks Springs. Comment
  UCD57304  Rhus aromatica Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3675 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 366 Comment
  UCD82135  Rhus aromatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5667 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  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
  HSC94175  Ribes malvaceum var. malvaceum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 4 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  UCD120073  Ribes quercetorum Gordon Harrington 2012-2-14 s.n. Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property. 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
  CHSC90878  Ribes roezlii D. Isle 2003-6-24 214 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. UTM's: 10S 0523825E 4346753N. 1767 Comment
  LA97624  Ribes roezlii J. M. Tucker; 1959-5-30 3524 Colusa Goat Mountain, ca. 1.25 mi. NW of Goat Mountain Lookout 1767 Comment
  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
  HSC48145  Rigiopappus leptocladus Thomas W. Nelson, Jane P. Nelson 1978-4-30 3966 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  UCD82862  Rigiopappus leptocladus Gordon Harrington 2008-4-13 73 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  CAS-BOT-BC147382  Rosa californica Roxana Stinchfield 1916-7-8 384 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC158727  Rubus ursinus Roxana S. Ferris 1926-4-21 6310 Colusa Oak Graove Sycamore Slough, near Sycamore Comment
  POM163497  Rubus vitifolius Roxana S. Ferris 1926-4-21 6310 Colusa Sycamore Slough/ Near Sycamore. 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
  UCD82155  Rumex conglomeratus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5681 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
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CDA2395  Saccharum ravennae Gordon Leppig 2001-3-29 1541 Colusa Route 16, 100 meters east of mile marker 4.58. 0 Comment
Read comments
Jul 31 2014
  HSC102730  Saccharum ravennae J. P. Smith 2013-8-23 13779 Colusa Along State Route 16 above Cache Creek. 192 Comment
  CHSC79280  Sagina apetala B. Castro; L. P. Janeway 2000-4-10 1063 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 91 Comment
  UCD138020  Sagittaria longiloba June McCaskill 1954-8-23 374 Colusa 7 miles east of Arbuckle, jus north of the road east from Arbuckle. Comment
  CAS-BOT-BC445794  Sagittaria montevidensis Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa Eight miles north of Colusa Comment
  UC935750  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-6 12961 Colusa on Colusa - Marysville Highway four mi s Colusa (w side of Sacramento River); w side of Sacramento River 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
  CAS-BOT-BC103026  Salix bonplandiana Roxana S. Ferris 1926-4-23 6401 Colusa near Mountain House on Williams - Stonyford Road Comment
  UCD163852  Salix breweri Craig D. Thomsen 2000-6-7 2368 a Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  JEPS80787  Salix exigua L. R. Heckard and J. C. Hickman 1981-7-30 5760 Colusa se side Snow Mt. (Trout Creek) 1600 Comment
  UCD163351  Salix exigua Craig D. Thomsen 2000-5-12 2359 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  CDA39532  Salix gooddingii G. D. Barbe 1975-6-4 2008 Colusa North of boat ramp, Colusa State Recreation Area. 0 Comment
  CDA12796  Salix laevigata G. F. Hrusa 1996-2-26 12631 Colusa Inner North Coast Ranges; Small valley approx. 5 m. NW of Hwy. 20 along Leesville Rd. W of Oat Valley at S end of Boxer Valley. Comment
  CDA12799  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa Inner North Coast Ranges; On Sites-Lodoga Rd. ~2.5 m. NW of Sites at base of Little Antelope Grade. Comment
  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
  UCD164153  Salix laevigata Craig Thomsen 1999-4-27 1999 Colusa Bear Creek Canyon. Along Bear Creek, just north of Sulphur Creek confluence, next to Wilbur Bridge. Comment
  UCD57306  Salix laevigata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3677 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  UCD82128  Salix laevigata Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5658 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
  UCR206356  Salix laevigata George K. Helmkamp, E. A. Helmkamp 2009-3-11 14380 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  JEPS81275  Salix lasiandra var. lasiandra L. R. Heckard and J. C. Hickman 1982-7-5 5885 Colusa s side Snow Mt. (Summit Springs, slope below (s of ) area) 1500 Comment
  CHSC114706  Salix lasiolepis G. F. Hrusa 1999-5-16 15047 Colusa Below ridge of summit of Goat Mountain on S side. At intersection of rd to Young's Corral and Goat Mtn Lookout. UTM: 10S, 4347149N, 0523426E. 1737 Comment
  UC1179040  Salix lasiolepis Herbert L. Mason 1947-3-29 13154 Colusa ca. 3 mi ne Colusa; Butte Sink, Butte Creek Comment
  UC1179060  Salix lasiolepis Herbert L. Mason 1947-3-29 13161 Colusa ca. 3 mi ne Colusa; Butte Sink, Butte Creek Comment
  CDA20233  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; 5th St and Hillgate Rd, Arbuckle, just E of Hwy 5 behind Shell Stn on RR tracks. 42 Comment
  CDA20232  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. Area mostly S. tragus. 0 Comment
  JEPS118679  Salsola soda B. Castro with Dave Bogener 2011-9-1 1913 Colusa Sacramento Valley. 10 air mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Moulton Weir 7.5' quad. Comment
  CAS-BOT-BC176899  Salsola tragus Roxana Stinchfield 1916-7-8 369 Colusa Sycamore Slough Road Comment
  CDA12015  Salvia columbariae G. F. Hrusa 1990-4-8 7667 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  HSC62788  Salvia columbariae J. M. DiTomaso 1979-4-14 874 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  HSC72151  Salvia columbariae J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9564 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  JEPS62672  Salvia columbariae R. F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville (e of Leesville) Comment
  UCD163337  Salvia columbariae Craig D. Thomsen 2009-5-3 2808 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  SEINET12326928  Salvia columbariae E. M. Kelly 1977-1 9 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 10 mi WSW of Williams. Wilbur Springs Quadrangle, 15'.* 143 Comment
  UCD70242  Salvia mellifera D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Open serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  JEPS75867  Sambucus mexicana L. R. Heckard 1974-9-10 3881 Colusa East Circle Trail Snow Mt. (at base of ne-facing rocky cliff along spur running se from west peak) 2011 Comment
  JEPS80781  Sambucus mexicana L. R. Heckard and J. C. Hickman 1981-7-30 5755 Colusa Trout Creek Snow Mt. (se side of mt.) 1600 Comment
  CAS-BOT-BC238628  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC238629  Sambucus nigra subsp. caerulea Roxana S. Ferris 1917-4-15 622 Colusa Sacramento River levee near Sycamore Slough Comment
  CAS-BOT-BC238630  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield ranch Comment
  CAS-BOT-BC230039  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD82459  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD66530  Sanicula crassicaulis Craig D. Thomsen 2000-4-12 2153 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66606  Sanicula tuberosa Craig D. Thomsen 2000-5-11 2282 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
  UCD67087  Schoenoplectus acutus var. occidentalis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5109 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
  RSA530101A  Schoenoplectus glaucus D. W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles north of Ware Road 24 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  SEINET9769686 Image available Schoenoplectus tabernaemontani Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  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
  UC1055825  Scirpus acutus var. occidentalis Frank W. Gould 1940-5-15 1257 Colusa 2.5 mi n Maxwell (in marshes along roadside); n of Maxwell 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
  UC1100902  Scirpus maritimus Malcolm A. Nobs, S. Galen Smith 1949-9-9 1872 Colusa rice fields 3 mi w Williams; w of Williams Comment
  CHSC75613  Scutellaria californica Vernon H. Oswald; Lowell Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area. 975 Comment
  UC1299474  Scutellaria siphocampyloides Freed W. Hoffman 1947-6-19 1661 Colusa Cooks Springs, western Colusa County Cooks Springs Comment
  CHSC112016  Scutellaria siphocampyloides David Isle; F. Thomas Griggs 1979-5-23 2073 Colusa Mendocino National forest. Off N side Goat Mtn. Rd, about 2 miles W of jct w/ Lodoga-Stonyford Rd. Near old fire pre-attack triangular sign I-7 on metal T-post. 426 Comment
  JEPS73510  Sedum obtusatum subsp. boreale L. R. Heckard 1972-7-10 3128 A Colusa among rocks of promontory on se corner of Snow Mt. overlooking and 3 mi nw Fouts Springs; se corner Snow Mt., nw of Fouts Springs 1828 Comment
Read comments
Aug 17 2011
  RSA201801  Senecio eurycephalus J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, 8.6 miles (by Bear Valley Road) northwest of junction with State Highway 20. 396 Comment
  CDA11923  Senecio greenei G. F. Hrusa 1989-5-7 6078 Colusa North Coast Biodiversity Arena; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  CHSC79528  Sidalcea diploscypha B. Castro; L. P. Janeway 2000-5-1 1104 A Colusa Vicinity of Sites and Grapevine Creek. 365 Comment
  UCD116629  Sidalcea diploscypha Clinton C. Shock 1980-5-3 63 Colusa Bear Valley west side, about 12 miles northwest of State Highway 20 near State Highway 16. 390 Comment
  JEPS50051  Sidalcea hartwegii W. L. Jepson 1932-5-8 16278 Colusa Lodoga Lodoga (w Colusa Co.) Comment
  UCD82538  Sidalcea hartwegii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5691 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
  CHSC91809  Sidalcea oregana subsp. hydrophila G. F. Hrusa; S. Winterton 2004-6-6 16385 Colusa Northern California. Inner North Coast Ranges. Mendocino National Forest. Rd 21N06D off 21N06 off Forest Rd. M3. Lower Markham Ridge at small pond site. Pond visible on 7.5' topo. 1348 Comment
  UC767046  Silene antirrhina R. F. Hoover 1938-4-24 3215 Colusa Sand Creek foothills w Arbuckle; Sand Creek foothills w of Arbuckle Comment
  CDA15466  Silene californica G. F. Hrusa, WTD 1998-6-19 14603 Colusa North Coast Ranges; Upper Little Stony Creek. Goat Mtn. Rd. ~ 2 km. W of campground. Comment
  UC583287  Silene californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi nw Rumsey; nw of Rumsey 304 Comment
  POM174579  Silene californica Roxana S. Ferris 1926-4-23 6444 Colusa Near top of Grapevine Grade on Stonyford-Sites Road. Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  UCR37946  Silene gallica Brian Kearney, Mike Malamus, Peter Williams 1984-4-29 10 Colusa Bear Valley Road, 2 mi. north of Hwy 20. 366 Comment
  JEPS124241  Silene laciniata subsp. californica Lowell Ahart 2015-4-1 19992 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  SEINET11262894  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  UCD56665  Silene laciniata subsp. californica Jack Alderson 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. 555 Comment
  UCD99009  Silene laciniata subsp. californica Kathleen A. Robson 1981-5-25 41 Colusa from Stonyfield, take Fouts Spring Road 8 miles west to Fouts Springs, continue 1 mile West along roadside. 579 Comment
  CHSC32220  Silene verecunda James Jokerst 1980-8-6 1053 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  JEPS73457  Silene verecunda subsp. platyota L. R. Heckard 1972-7-8 3061 Colusa saddle between East and West Peaks of Snow Mt. saddle between East and West Peak of Snow Mt. 1981 Comment
  UCD81234  Sisymbrium irio Ellen Dean; K. Mawdsley and B. Rice 2009-5-6 5571 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Along Bear Creek south of Brophy Canyon, near old access road that leaves Hwy. 16 near milepost 6. 218 Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. 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
  JEPS124213  Sisyrinchium bellum Lowell Ahart 2015-4-10 20012 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  HSC62938  Sisyrinchium bellum Michael Dalke 1979-4-14 49 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  SEINET3992537  Smilacina stellata J. M. Tucker, L. K. Mann 1959-5-30 3529 Colusa Small lake in Mill Valley, ca. 0.25 mi N. W. of Lower Letts Valley, and ca. 4 air miles N. of Goat Mountian Lookout 1219 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
  POM62090  Solanum americanum Roxana Stinchfield 1916-7-7 385 Colusa Sycamore Slough bed. Stinchfield Ranch. Comment
  UCR201554  Solanum americanum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14256 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  CDA33581  Solanum elaeagnifolium Robin Breckenridge 2010-8-17 PDR# 1313487 Colusa Interstate 5 north, 1 mile before Hahn Rd. exit. 0 Comment
  NY821006  Solanum nodiflorum R. J. Stinchfield 1916-7-7 385 Colusa Stinchfield Ranch. Sycamore Slough bed Comment
  HSC62930  Solanum parishii Kenneth Clark 1979-4-14 103 Colusa Bear Valley Rd. 3.9 mi. N of State Rte. 20 412 Comment
  UCD13386  Solanum parishii Charles Martin 1986-5-17 35 Colusa Mendocino National Forest. 3.7 miles west of Stonyford on Forest Service Road 18NO1. 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
  CHSC94521  Solanum physalifolium var. nitidibaccatum Lowell Ahart 2006-8-22 13223 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CAS-BOT-BC35921  Solanum umbelliferum Roxana S. Ferris 1926-4-23 6591 Colusa Near Stonyford. Comment
  UC1053447  Solanum umbelliferum Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3175 Colusa 10 mi nw of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  CDA15549  Solidago californica G. F. Hrusa 1998-10-28 14900 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  HSC94133  Solidago velutina subsp. californica G. Fred Hrusa 1998-10-28 14900 Colusa Roadside along Cedar Camp Rd. as it enters Little Stony Creek Canyon, approx. 1 mi. from Lodoga/Stonyford Rd. 400 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
  UCD72466  Sonchus asper Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3800 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  CAS-BOT-BC236520  Sorghum bicolor Mary L. Bowerman 1940-1-1 3836 Colusa Wall Point Trail, Mount Diablo Comment
  CAS-BOT-BC235304  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  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
  UCD99217  Spergularia macrotheca var. leucantha Malcolm A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99 W, near Delevan. Comment
  CAS-BOT-BC390762  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 637 Colusa 2 mi. so. of Maxwell Comment
  CDA41017  Stachys ajugoides var. ajugoides Agr. Comm Staff 1960-5-11 s.n. Colusa [no additional data] 0 Comment
  CHSC80392  Stachys ajugoides var. rigida Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  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
  JEPS104386  Stachys albens Lowell Ahart 2003-7-14 10381 -A Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  SEINET13710181  Stachys albens Lowell William Ahart, Lowell William Ahart 2003-1 10381 -A Colusa 2 Mi. SW Jct. Hwy 20 and Bear Valley Road, 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23' 59.5"W) 1708'W) 521 Comment
  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
  CHSC62930  Stellaria nitens Vernon H. Oswald; Lowell Ahart 1994-4-6 6072 Colusa Goat Mtn. Rd. 0.8 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. On the edge of the road. 487 Comment
  JEPS80756  Stephanomeria lactucina L. R. Heckard and J. C. Hickman 1981-7-29 5723 Colusa spur about 1 km se Summit Springs (s side of Snow Mt.); Snow Mt. 1554 Comment
  CHSC91026  Streptanthus D. Isle 2003-6-10 360 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0526306E 4345340N. 1365 Comment
  UCD23461  Streptanthus batrachopus A. M. Shapiro 1988-6-6 s.n. Colusa Goat Mountain Road. 762 Comment
  CAS-BOT-BC61238  Streptanthus breweri Alice Eastwood; John Thomas Howell 1938-5-16 5627 Colusa Lake-Colusa county line. On road to Williams. Comment
  UC1733757  Streptanthus breweri Kay H. Beach 1940-5-16 1258 Colusa Colusa and Lake county line Comment
  UC1736740  Streptanthus breweri Dean W. Taylor 1998-6-16 16663 Colusa Bear Valley road 1.5 mi NW junction Highway 120; near mouth Warnick Canyon 350 Comment
  UCD110407  Streptanthus breweri Daniel Slakey; CNPS volunteers 2011-6-12 3 Colusa Walker Ridge. Brim Rd., 1/4 mile E of Walker Ridge Rd. Population extends about 1 mile farther east. 647 Comment
  CAS-BOT-BC61237  Streptanthus breweri Roger Raiche 1985-5-25 50460 Colusa Walker Ridge, Brim Road, near intersection West Walker Road. 637 Comment
  HSC62796  Streptanthus breweri M. A. Ericksen 1979-4-14 207 Colusa Adjacent to Bear Valley Rd., 3.9 mi. from Hwy. 20 Comment
  HSC72216  Streptanthus breweri Thomas W. Nelson, Jane P. Nelson 1980-6-24 5872 Colusa Colusa-Lake County line, along trail to Snow Mtn., 0.5 mi. from trailhead 1616 Comment
  CHSC48348  Streptanthus breweri var. breweri Vernon Oswald 1984-5-2 1166 Colusa Fouts Springs Rd. (M10) in the Mendocino National Forest, 5.1 mi w of Stonyford. 548 Comment
  UC1051749  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-17 4251 Colusa above Wilbur Springs; Inner North Coast Ranges, Wide Awake Mercury Mine 462 Comment
  UCD57659  Streptanthus breweri var. breweri Madeline Christopher; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. 335 Comment
  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
  UCD82160  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5693 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  JEPS93866  Streptanthus drepanoides Vernon H. Oswald and Lowell Ahart 1998-7-15 9275 Colusa Bartlett Springs Road 2.6 mi w of Bear Valley Road (0.3 mi e of Sawtelle Valley and Grapevine Flat Roads) 624 Comment
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Jul 24 2018
  CHSC25074  Streptanthus glandulosus D. Joley 1968-3-30 Colusa On Hwy 20 10 mi w of Williams. Comment
  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
  CAS-BOT-BC87086  Streptanthus glandulosus subsp. glandulosus Robert F. Hoover 1938-4-23 3205 Colusa Grade on Rumsey-Arbuckle Road. Comment
  UC1178879  Streptanthus glandulosus subsp. glandulosus Herbert L. Mason 1941-4-5 12408 Colusa on road between Maxwell and Stonyford just w summit of grade Comment
  UC596393  Streptanthus glandulosus subsp. glandulosus R. F. Hoover 1938-4-23 3205 Colusa grade on Rumsey-Arbuckle road Rumsey-Arbuckle road Comment
  UC764981  Streptanthus glandulosus subsp. glandulosus R. F. Hoover 1938-4-23 3205 Colusa grade on Rumsey-Arbuckle road Comment
  SEINET11993370  Streptanthus morrisonii Unknown 1985-1 50668 Colusa W of Ladoga, off of Goat Mt. Rd, Frenzel Creek drainage 707 Comment
  SEINET11993700  Streptanthus morrisonii Unknown 1984-1 RR 40259 Colusa W of Ladoga, Goat Mt Rd, along Little Stonyford Cr (2 mi W of origin of road at Ladoga-Stonyford Rd) 427 Comment
  UCD146583  Streptanthus morrisonii Roger Raiche 1984-7-4 RR 40259 Colusa west of Ladoga, Goat Mt. Road, along Little Stonyford Creek (2.0 miles west of origin of road at Ladoga-Stonyford Rd). 426 Comment
  UCR141627  Styrax officinalis var. californicus Roman Gankin 1959-4-19 330 Colusa Along road to Walker Ridge from Bear Valley Comment
  UCD119091  Styrax redivivus Tom Aldrich 1975-5-25 17 Colusa 2.3 miles west of Leesville Grade, Wilbur Springs Road junction, toward Walker Ridge. Comment
  UCD119103  Styrax redivivus Roman Gankin 1965-5-5 518 Colusa On Bartlett Springs Road from Bear Valley, ca. 2 miles west of junction with Lodoga Road. Comment
  CHSC29751  Suaeda nigra K. R. Stern 1980-6-30 6653 Colusa Vernal pool, south central border of Colusa National Wildlife Refuge. 45 Comment
  UCD163324  Suaeda nigra Craig D. Thomsen 1997-4-19 1906 Colusa Wilbur Springs. About 4 miles north of Hwy 20. Comment
  CAS-BOT-BC97651  Symphyotrichum chilense Roxana Stinchfield 1916-7-11 437 Colusa Sycamore Slough Road 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
  UC727671  Symphyotrichum subulatum Milo S. Baker 1946-9-4 11614 Colusa near locked gate of Colusa Gun Club; Butte Sink Comment
  UCD86110  Taeniatherum caput-medusae Beecher Crampton 1958-5-19 4788 Colusa 8.5 miles east (probably west) of Williams, just off of Highway 20. Comment
  HSC31622  Tamarix parviflora Glenn McGourty 1974-4-20 6 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
  HSC41184  Tamarix parviflora Robert M. Specht, John Rehling 1976-4-12 383 Colusa 7.5 mi. S of Hwy. 20 on Hwy. 16 Comment
  UCD101743  Tamarix parviflora S. R. Sims 1971-4-24 34 Colusa 16 miles northwest of Rumsey; along a watercourse. Comment
  CHSC59989  Tetrapteron graciliflorum Terri Simon 1975-4-20 14 Colusa Field. Bear Valley Road, 8.7 miles north of State Highway 20. 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
  CAS-BOT-BC240289  Thalictrum fendleri Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2730 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD81708  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
  UCR47922  Thelypodium flavescens Walter C. Overton 1980-4-14 s.n. Colusa Side canyon on road into Bear Valley, c. 1 mi. north of junction of State Hwys 16 and 20. Comment
  UCD93333  Thinopyrum ponticum Beecher Crampton 1963-8-5 6867 Colusa 1/4 mile E of Cortena. Comment
  HSC66006  Thysanocarpus curvipes Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 41 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  CAS-BOT-BC88159  Thysanocarpus curvipes Roxana S. Ferris 1917-4-14 553 Colusa 7 miles west of Arbuckle. 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
  CHSC112230  Thysanocarpus laciniatus Lowell Ahart 2013-5-1 18664 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
  CHSC62928  Thysanocarpus laciniatus Vernon H. Oswald; Lowell Ahart 1994-4-6 6065 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
  JEPS95519  Tonella tenella Vernon H. Oswald and L. Ahart 1994-4-6 6068 Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UCD56916  Tonella tenella Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3519 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  POM163525  Torilis nodosa Roxana S. Ferris 1926-4-21 s.n. Colusa On Sycamore slough, 2 miles from Sycamore Comment
  UCD41197  Torilis nodosa James Salyards 1986-5-17 86 - Colusa Along Maxwell-Sites Road, 0.95 mi. east of Sites. Comment
  UCD57559  Torilis nodosa Stephanie Castle; 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, just north of Craig Creek. 304 Comment
  CAS-BOT-BC172885  Toxicodendron diversilobum Alice Eastwood 1921-4-11 10236 Colusa Colusa Comment
  UCD163692  Toxicoscordion fontanum Craig Thomsen 1999-4-27 1994 Colusa Bear Valley. About 6 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD139830  Toxicoscordion fremontii Jim Nelson Date Unknown s.n. Colusa Wilbur Springs. Comment
  UCD15424  Toxicoscordion fremontii Margit Sands 1985-4-13 27 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  UCD139842  Toxicoscordion fremontii Kim E. Steiner 1978-4-29 200 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  UCD14319  Toxicoscordion fremontii Kathi A. Zurakowski 1984-4-21 Colusa Bear Valley, 3.2 miles north of Wilbur Springs turnoff; west side of the road. 381 Comment
  UCD14425  Toxicoscordion fremontii R. M. Rhode 1984-4-21 s.n. Colusa Bear Valley, 10 miles north of intersection of Highways 16 and 20. 426 Comment
  CHSC49670  Toxicoscordion micranthum Vernon Oswald 1984-5-2 1170 Colusa Fouts Springs Rd. (M10) in Mendocino National Forest, 5.9 mi w of Stonyford. 60 Comment
  UCD82530  Trichostema Craig Thomsen; G. Harrington 2009-5-12 2886 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. 710 Comment
  JEPS108910  Trichostema laxum Lowell Ahart 2006-8-9 13093 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  RSA718053  Trichostema laxum L. Ahart 2006-8-9 13093 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UCD55465  Trichostema laxum Ellen Dean; Gordon Harrington 2006-10-6 3290 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
  SEINET10499336  Trichostema laxum Katherine L. Morris 1973-6-6 Morris 387 Colusa Chaparral woodland and sparse oaks, on hwy 20, .3 mi e of lake co line. Comment
  UCSC005368  Trifolium Randall Morgan 1995-5-16 2628 Colusa Bear Valley Comment
  HSC45736  Trifolium albopurpureum M. Alcasas 1978-4-22 46 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA590138  Trifolium albopurpureum Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7292 Colusa Along Bear Valley Road, 4.6 miles N of junction Wilbur Springs Road Comment
  SEINET11173449 Image available Trifolium albopurpureum J. M. Tucker, Dorothy Dreyfus 1967-4-29 4036 Colusa South end of Bear Valley, 6.3 miles north of junction of Bear Valley Road with State Highway 20 427 Comment
  UCD107366  Trifolium albopurpureum R. Tofsrud 1949-4-1 s.n. Colusa Off Highway 20, E of Williams about 6 miles. Comment
  HSC96791  Trifolium albopurpureum var. dichotomum J. Carey, J. Leffingwell, A. Hong 1995-5-6 80 Colusa .5 mi. E down Brim Rd. from its jct. with Walker Ridge Rd. 640 Comment
  JEPS124214  Trifolium bifidum var. bifidum Lowell Ahart 2015-4-10 20009 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  CHSC107959  Trifolium bifidum var. decipiens B. Castro; T. Boullion 2011-4-20 1842 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. Off north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in grassy uplands. 49 Comment
  CHSC115393  Trifolium bifidum var. decipiens Lowell Ahart 2015-4-10 20010 Colusa On the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. 500 Comment
  HSC45684  Trifolium ciliolatum Patricia Shesgreen 1978-4-22 46 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC107963  Trifolium depauperatum var. amplectens B. Castro; T. Boullion 2011-4-20 1840 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. In grassy vernally moist swale which just north of large +- saline/alkaline wetland/marsh, in small vernal pool. 49 Comment
  CHSC27812  Trifolium depauperatum var. depauperatum Jan M. Karaz 1978-4-9 8 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, 18 mi sw of Williams. 321 Comment
  UCR212346  Trifolium depauperatum var. truncatum Craig D. Thomsen 2000-4-12 2165 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
  RSA590142  Trifolium depauperatum var. truncatum Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7289 Colusa Along Bear Valley Rd., 2.5 mi. N jct. Wilbur Springs Rd. Comment
  HSC87052  Trifolium dichotomum L. Blackford, S. Branch, D. Malm 1988-4-16 59 Colusa 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  UCSC010689  Trifolium dichotomum R. Morgan 1995-5-16 2630 Colusa Bear Valley Road Comment
  UCR146312  Trifolium fragiferum Beecher Crampton 1961-7-20 5933 Colusa 2 mi south of Grimes Comment
  CHSC107981  Trifolium fucatum B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1853 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 280 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CHSC84913  Trifolium fucatum Ron P. Garcia 1995-4-1 5 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
  UCR119031  Trifolium fucatum Beecher Crampton 1962-4-17 6221 Colusa Sacramento Valley, 3.3 miles north of College City 91 Comment
  UCD35561  Trifolium fucatum Beecher Crampton 1958-4-21 4737 Colusa 13.8 miles northwest of Rumsey, along State Highway 16. Comment
  UCD35784  Trifolium fucatum Beecher Crampton 1962-4-17 6221 Colusa 3.3 miles north of College City. Comment
  UCD58116  Trifolium glomeratum Ellen Dean; PLB 102 Class 2007-4-29 3711 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  UCD64277  Trifolium hirtum Craig D. Thomsen 2000-3-31 2076 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
  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
  JEPS94737  Trifolium obtusiflorum Vernon H. Oswald and Lowell Ahart 1998-7-15 9302 Colusa 6.3 mi n of Highway 20 (w side of county on Walker Ridge Road 8.2 mi s of Bartlett Springs Road); Walker Ridge Road 792 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
  UCD82721  Trifolium obtusiflorum Craig Thomsen; G. Harrington 2009-5-14 2904 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
  UCSC011130  Trifolium obtusiflorum Lowell Ahart 2006-8-9 13130 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SBBG128768  Trifolium obtusiflorum L. Ahart 2013-5-1 18679 Colusa N side of the wash, N side of State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  UCD134781  Trifolium resupinatum Josh Davy 2013-6-15 s.n. Colusa Pasture just north of Williams on the east side of I-5. 21 Comment
  JEPS110097  Trifolium variegatum Lowell Ahart 2006-8-9 13131 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC16913  Trifolium wormskioldii J. Burtt Davy 1898-5-1 Colusa near Princetown 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
  UCD163681  Triphysaria eriantha Craig Thomsen 1999-4-15 1982 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD64257  Triphysaria eriantha Craig D. Thomsen 2000-3-31 2057 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
  UCR212332  Triphysaria eriantha Craig D. Thomsen 2000-3-31 2057 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
  HSC34867  Triphysaria eriantha Thomas W. Nelson, James Nelson 1975-3-27 1771 Colusa Bear Valley Rd. Comment
  CHSC114969  Triphysaria versicolor subsp. faucibarbata Lowell Ahart 2015-4-1 20003 Colusa In the field on the west side of Leesville Lodoga Road, abot 1/2 mile south of Lodoga, about 16 miles (air) west of Maxwell. 365 Comment
  CHSC107985  Triteleia hyacinthina B. Castro; L. Janeway 2011-4-27 1868 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approxamately 0.7 mi southeast of Funks Reservoir and 350 ft northeast of Tehama-Colusa Canal. Scattered in lush grassland northwest of large +/- alkaline marsh. 52 Comment
  CAS-BOT-BC361304  Triteleia laxa Richard R. Halse 2013-3-26 8737 Colusa Along the Leesville Road ca. 4.6 miles NW of its junction with State Hwy 20, west of Williams. 157 Comment
  CHSC70922  Triteleia laxa Vernon Oswald; Lowell Ahart 1998-4-21 8945 Colusa Stonyford-Lodoga Rd 3.7 mi south of Stonyford. 384 Comment
  JEPS83146  Triteleia laxa L. R. Heckard 1972-7-10 3119 Colusa near Trout Creek (crossing of trail to Box Spring); Snow Mt. 1828 Comment
  POM276975  Triteleia laxa Lyman Benson 1929-3-26 1044 Colusa Williams Comment
  RSA537523  Triteleia laxa Barbara Ertter 1989-7-1 8613 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
  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
  SEINET5585730  Triteleia laxa Richard R. Halse 2013-1 8737 Colusa Along the Leesville Road ca. 4.6 miles northwest of its junction with State Hwy. 20, west of Williams. Comment
  UCD57465  Triteleia laxa Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3654 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Craig Canyon, along unimproved road. 322 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
  RSA523190  Triteleia laxa R. R. Halse 1989-5-7 3825 Colusa Along the Leesville Road, 3 miles southeast of Leesville, just below the summit of the pass on the east side 480 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
  UCD66461  Triteleia peduncularis Craig D. Thomsen 2000-6-23 2410 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-BC527388  Triteleia peduncularis Lillian S. Mott 1965-5-31 LM 6550 Colusa Highway 20 east of Clear Lake 396 Comment
  RSA202879  Triteleia peduncularis Annetta Carter 1953-6-20 3241 Colusa Near summit east of Hough Springs on Bartlett Springs Road. Comment
  SEINET3888961  Triteleia peduncularis Annetta Carter 1953-6-20 3241 Colusa Near summit east of Hough Springs on Bartlett Springs Road.; 0 Comment
  RSA714649  Triticum aestivum Daisie Huang 2006-4-16 6041601 Colusa Colusa Trough and Grimes-Arbuckle Road. Ditch next to field. 11 Comment
  CHSC86968  Tropidocarpum gracile B. Castro 2003-5-15 1435 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Along sides of dirt road near concluence of small creek, on west edge of Sacramento Valley. 79 Comment
  JEPS118683  Tropidocarpum gracile David Isle, Ronda Isle 2009-4-1 1910 Colusa W of Isle barn & field adj garden fence. 2253 Dennis Dr, Stonyford. Gilmore Peak 7.5' quad. Comment
  HSC102792  Tropidocarpum gracile David Isle, Rhonda Isle 2009-4-1 1910 Colusa Stonyford; Dennis Drive, west of Isle barn and garden 375 Comment
  UCD163866  Typha angustifolia Craig D. Thomsen 2001-5-31 2554 Colusa Bear Creek Canyon, south of Bear Valley. About 4 miles north of Hwy 20. Comment
  UCD72405  Typha latifolia Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5120 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
  SEINET7075570  Uropappus lindleyi A. G. Vestal 1955-4-5 s.n. Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  UC71622  Uropappus lindleyi Miss Alice King 1905-1 Colusa College City 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
  UC1736436  Verbena brasiliensis Dean W. Taylor 1993-8-31 14068 Colusa Sacramento National Wildlife Refuge, along North Fork Logan Creek 24 Comment
  UCD68106  Verbena lasiostachys Kathleen A. Robson 1981-5-25 45 Colusa From Stonyford, take Fouts Springs Road 8 miles West to Fouts Springs, continue 1 mile West along roadside. 579 Comment
  JEPS110057  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
  CHSC113134  Verbena lasiostachys var. scabrida Lowell Ahart 2013-10-1 19091 A 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
  RSA0112572  Verbena lasiostachys var. scabrida Lowell A. Ahart 2013-10-1 19091 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
  CHSC60692  Veronica peregrina subsp. xalapensis Vernon H. Oswald 1993-4-14 5262 Colusa W side of O'Hair Rd., just S of Hwy. 20, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CHSC94467  Veronica peregrina subsp. xalapensis Lowell Ahart 2006-8-9 13126 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80213  Veronica peregrina subsp. xalapensis L. R. Heckard and J. Hickman 1980-7-3 5367 Colusa Summit Springs, sw slope of Snow Mountain Summit Springs; Snow Mountain, Summit Springs 1554 Comment
  SD225893  Veronica peregrina subsp. xalapensis Carol Witham, Jennifer Buck and Vernal Pool Team 2001 2001-4-30 147 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa airport, Dolan Ranch site, pool # DOL001 Comment
  UC1179090  Veronica peregrina subsp. xalapensis Herbert L. Mason 1947-3-29 13149 Colusa 3 mi ne of Colusa (along Butte Creek, Butte Sink); Butte Creek, Butte Sink Comment
  RSA176712  Veronica peregrina subsp. xalapensis D. E. Breedlove 1963-4-20 4620 Colusa 12 miles W of Arbuckle on the Rumsey-Arbuckle Road. Comment
  CHSC89886  Vicia americana var. americana B. Castro; L. P. Janeway 2001-4-18 1239 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. Adjacent to dirt road paralleling N-S-trending creek. On gravel bar at confluence of two perennial creeks. 259 Comment
  CHSC80384  Vicia benghalensis Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  UCD83716  Vicia sativa subsp. nigra Joseph Schlottman; with PLB 102 class 2010-5-2 2 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  UCD163908  Vicia villosa Sara Martin 2016-4-9 1 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just west of Cowboy Camp on east side of Bear Creek. 312 Comment
  RSA0033768  Viola adunca Barbara Ertter 1989-7-1 8605 Colusa Road to Goat Mt. Lookout 1.7 mi. S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  UC1761574  Viola adunca Hoffman 1948-6-17 2618 Colusa Upper Letts Valley 1310 Comment
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May 8 2018
  UC2028224  Viola adunca Barbara Ertter 1989-7-1 8605 Colusa Road to Goat Mt Lookout 1.7 mi S of Rt M-10 (Bear Creek-Fouts Spring Road) at head of South Fork Stony Creek, ca. 12 airmiles WSW of Stonyford 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
  JEPS50291  Viola douglasii Alice King 1906-4-1 Colusa College City Comment
  JEPS73518  Viola douglasii L. R. Heckard 1972-7-10 3137 Colusa between Foutch Camp and Trout Creek crossing; Snow Mountain 1889 Comment
  UCD56663  Viola douglasii Sam Bledsoe 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. 560 Comment
  UCD56690  Viola douglasii Gordon Harrington 2007-3-25 9 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. 584 Comment
  UCD67093  Viola douglasii Ellen Dean; Davis Botanical Society 2008-5-31 5023 Colusa West of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD82461  Viola douglasii Craig Thomsen; G. Harrington 2009-5-12 2839 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UC1005691  Viola douglasii Frank W. Gould 1939-4-7 627 Colusa on road from Knoxville to Rumsey (just n of county line) Comment
  UCD40924  Viola douglasii Kathi A. Zurakowski 1984-4-21 s.n. Colusa Bear Valley. Meadow at Barrel Springs Campsite (on road along ridge). 701 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
  UCD66963  Viola glabella Ellen Dean; Davis Botanical Society 2008-5-31 5007 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  CAS-BOT-BC203034  Vitis californica Roxana S. Ferris 1926-4-22 6303 Colusa Sycamore Slough near Sycamore Comment
  UCD81227  Vitis californica Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5564 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. 446 Comment
  HSC72166  Vulpia microstachys J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9541 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  HSC87055  Vulpia microstachys Pat Daly 1988-4-16 52 Colusa 21.6 mi. off Hwy. 20 on Brim Rd., via Walker Ridge Rd. 518 Comment
  UCD66700  Vulpia microstachys var. ciliata Craig D. Thomsen 2001-4-12 2431 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
  UC596025  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
  SEINET186048 Image available Vulpia microstachys var. pauciflora Annetta Carter 07/40/0001 1374 Colusa Comanche Hills,4 mi. N. of Rumsey, Inner North Coast Range. 244 Comment
  UCD94505  Vulpia microstachys var. pauciflora Beecher Crampton 1958-4-21 4722 Colusa along State Hwy. 16, junction on Bear and Cache creeks, 7.4 miles northwest of Rumsey, on county line. Comment
  CAS-BOT-BC184670  Vulpia myuros subsp. megalura Roxana S. Ferris 1926-4-21 6278 Colusa Sycamore Slough 2 miles from Sycamore Comment
  CHSC100271  Vulpia myuros var. hirsuta D. Isle 1988-4-13 1511 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  JEPS80221  Vulpia myuros var. myuros L. R. Heckard and J. Hickman 1980-7-3 5376 A Colusa w of Summit Springs (sw slope of Snow Mt); Snow Mt. 1554 Comment
  CHSC77916  Wyethia angustifolia Jean Witzman; Beth Hendrickson 1999-5-6 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sulphur Gap. 164 Comment
  UCD58170  Wyethia angustifolia Gordon Harrington 2007-5-19 60 Colusa BLM Payne Ranch. Along Hwy 16, south of the the intersection of Hwy 16 and Hwy 20. East edge of Cowboy Camp parking area. 315 Comment
  UC2014156  Wyethia angustifolia Gordon Harrington 2007-5-19 60 Colusa Colusa County: BLM Payne Ranch. Along Hwy 16, south of the the intersection of Hwy 16 and Hwy 20. East edge of Cowboy Camp parking area. Comment
  RSA589934  Wyethia glabra Michael A. Vincent, Robert M. Rhode 1996-3-30 7271 Colusa Along St Hwy 16, near mile marker 6/65, a little N of the Yolo Co. line; 6.65 mi S jct St Hwy 20. Comment
  JEPS32015  Wyethia helenioides W. L. Jepson 1932-5-8 16293 Colusa n of Stonyford (w Colusa County) Comment
  UC71626  Wyethia helenioides Miss Alice King 1905-1-1 Colusa College City Comment
  RSA232965  Wyethia helenioides D. A. Young 1969-5-4 P 466 Colusa 10 miles W of Wilbur Springs, along Hwy 16. 610 Comment
  CAS-BOT-BC383632  Xanthium spinosum Roxana Stinchfield 1916-7-8 400 Colusa Truck garden, Stinchfield ranch near Sycamore Comment
  JEPS15755  Yabea microcarpa W. L. Jepson 1932-5-7 16275 Colusa Lodoga; w Colusa County Comment
  UCD57621  Yabea microcarpa Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  CDA16110  Zeltnera trichantha G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15243 Colusa North Coast Ranges; Along Leesville Rd., +/- 1 mi S of Lodoga. 320 Comment
  UCD121476  Zeltnera trichantha Vernon H. Oswald; Lowell Ahart 1998-7-15 9267 B Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  UC1049538  Zigadenus Rimo Bacigalupi 1950-4-16 3109 Colusa Near Stony Creek Canyon entrance (vicinity of Colusa-Glenn County line); Inner North Coast Ranges, Mendocino National Forest. Comment
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Jun 12 2012
  CAS-BOT-BC530510  Zigadenus fremontii Wayne Roderick 1967-5-7 s.n. Colusa In a hay field, Bear Valley near Leesville 304 Comment
  CDA32831  Zigadenus fremontii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  RSA296705  Zigadenus micranthus Rick Lundquist 1979-4-14 17 Colusa Unspecified. 1067 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
  SEINET3889535  Zigadenus venenosus Steven Lagos 1974-5-4 42 Colusa Wilbur Springs Quad. Along roadside.; 0 747 Comment



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