Search Results — 2000 specimen records retrieved (1645 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: County=COLUSA; Source=All;   

Mapping Options:

BerkeleyMapper with county and bioregion layers
BerkeleyMapper without layers.
KML export
(Note: only records with coordinates are mappable)

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

PLEASE NOTE: Due to changes in newer versions of Excel, directly copying text from the above selected results does not produce a usable table.
    Follow these steps:
      1. The contents of the selected results window must be copied into a text editor like TextEdit for Mac or WordPad for Windows
      2. The selected results must be saved as a new text document.
      3. This new text document can now be copied into Excel or imported as a tab delimited text file.

(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

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

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
Turn on yellow flags to show possible range discrepancies. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCR201545  Abutilon theophrasti George K. Helmkamp, E. A. Helmkamp 2008-10-14 14263 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  JEPS80813  Acer macrophyllum L. R. Heckard and J. C. Hickman 1981-7-31 5786 Colusa e side Snow Mt. (se end rock promontory called Fouts Springs Overlook); e side Snow Mt., se end Fouts Springs Overlook 1783 Comment
  UCD80834  Acer macrophyllum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5291 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. 239 Comment
  POM194544  Acer macrophyllum Unspecified 1929-4-21 2383 Colusa Sonoran Valley Comment
Read comments
Aug 13 2014
  CAS-BOT-BC334173  Acer negundo var. californicum Roxana Stinchfield 1916-7-8 398 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC21710  Achillea millefolium Roxana S. Ferris 1917-4-14 586 Colusa 5 mi. west of Arbuckle Comment
  UCD82114  Achillea millefolium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5642 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
  JEPS80192  Achnatherum lemmonii L. R. Heckard and J. Hickman 1980-7-3 5343 Colusa w of Summit Springs (sw of Snow Mt.; 10 mi w of Stonyford); Snow Mt., Summit Springs 1548 Comment
  UCD50713  Achnatherum lemmonii Beecher Crampton 1958-5-19 4799 Colusa 5.8 miles south of Lodoga, Colusa County. Comment
  HSC45717  Achyrachaena mollis Sheila Logan 1978-4-22 60 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  POM163442  Achyrachaena mollis Roxana S. Ferris 1926-4-21 s.n. Colusa 3 mi W of Colusa.. Comment
  UCD64421  Achyrachaena mollis Craig D. Thomsen 2000-4-28 2177 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  HSC92504  Achyrachaena mollis J. Cromwell, Julie Schneider, A. Thoele 1994-4-23 45 Colusa Bear Valley, along Bear Valley Rd,. approx. 1.3 miles south of junction with Bartlett Springs Rd. 409 Comment
  UCD135734  Achyrachaena mollis Bruce G. Baldwin 1986-4-13 598 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road. 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
  CHSC112212  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 A Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120969  Acmispon brachycarpus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18648 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
  UCD56902  Acmispon brachycarpus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3505 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD63918  Acmispon brachycarpus Craig D. Thomsen 2001-5-24 2508 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
  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
  UCD66697  Acmispon denticulatus Craig D. Thomsen 2000-6-23 2385 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
  UCD67009  Acmispon denticulatus Craig D. Thomsen 2008-5-18 2736 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. Just south of Hwy 20, about 1 mile west of Hwy 16/20 intersection. Above perennial drainage. 365 Comment
  CHSC79737  Acmispon rubriflorus L. P. Janeway; B. Castro 2000-5-2 6691 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  UCR261745  Acmispon rubriflorus Ann Howald 2003-6-9 2362 A Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCR261747  Acmispon rubriflorus Ann Howald 2003-6-9 2369 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd, then c. 0.1 mile east on ranch road 397 Comment
  CHSC71112  Acmispon wrangelianus Jan Monelo 1989-4-1 13 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD66470  Acmispon wrangelianus Craig D. Thomsen 2001-4-12 2461 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  HSC98295  Acmispon wrangelianus D. R. Junell 1965-4-18 25 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  JEPS80827  Aconitum columbianum L. R. Heckard and J. C. Hickman 1981-7-31 5799 Colusa e. side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1645 Comment
  CAS-BOT-BC107  Adenostegia palmata Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-6-17 284 Colusa near College City Comment
  CAS-BOT-BC133153  Adenostoma fasciculatum Roxana Stinchfield 1916-6-18 304 Colusa Near College City Comment
  CHSC1534  Adenostoma fasciculatum V. Holt 1935-5-12 Colusa Near Stonyford. 335 Comment
  JEPS44792  Adenostoma fasciculatum Alice King June 1906 Colusa College City Comment
  UC71996  Adenostoma fasciculatum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD13213  Adenostoma fasciculatum Charles Martin 1986-5-17 27 Colusa Along Sites-Lodoga Road, ca. 8.2 miles W of Sites, on roadside. Comment
  SEINET10866059  Adenostoma fasciculatum Katherine L. Morris 1973-6-6 Morris 390 Colusa Chaparral woodland and sparse oak, on hwy 20, 0.3 miles e of lake co line Comment
  UCD56913  Adiantum jordanii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3516 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  CDA1644  Aegilops cylindrica C. Thomsen 1988-5-25 1537 Colusa Indian Creek Drainage, Arrowhead Ranch, Cooks Springs Road, Ladoga. 0 Comment
  UCD72465  Aegilops triuncialis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3799 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
  CDA4021  Aeschynomene rudis June McCaskill, J. Hill 1990-8-27 s.n. Colusa Near Princeton. 0 Comment
  CDA4027  Aeschynomene rudis G. D. Barbe, June McCaskill 1990-9-5 4397 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  SFV15096  Aeschynomene rudis B. J. McCaskill, G. D. Barbe (4397) 1990-9-5 s. n. Colusa West side of Boggs Road between Dodge and Fonseca Roads. MDB&M. Comment
  UCD104588  Aeschynomene rudis George Costa; Steven Scardaci 1990-8-28 s.n. Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  UCD104589  Aeschynomene rudis June McCaskill; with Jim Hill 1990-8-27 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  UCD104590  Aeschynomene rudis June McCaskill; with Jim Hill 1990-9-5 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  UCD104592  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  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
  JEPS75862  Ageratina occidentalis L. R. Heckard 1974-9-10 3887 Colusa s of East Peak (along intermittent spring of upper reaches of Dark Hollow Creek); Snow Mt., Dark Hollow Creek 2011 Comment
  JEPS83147  Ageratina occidentalis L. R. Heckard 1974-9-10 3887 Colusa stream of upper reaches Dark Hollow Creek; Snow Mt., East Peak 2011 Comment
  CHSC78591  Agoseris heterophylla J. Marr; H. West, C. Warren, J. Lacey-Rickert, N. Wight 1998-4-14 Colusa Vicinity of Antelope Valley. 121 Comment
  CHSC79649  Agoseris heterophylla L. P. Janeway; B. Castro 2000-5-2 6690 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  UCD56897  Agoseris heterophylla Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3500 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
  UCD92450  Agrostis Beecher Crampton 1958-5-19 4811 Colusa West of Lodoga. Little Stony Creek. Comment
  CHSC94532  Agrostis avenacea Lowell Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725021  Agrostis avenacea L. Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD51802  Agrostis avenacea Beecher Crampton 1963-8-5 6871 Colusa 3/4 mile E of Cortena, Lurline Road. Comment
  CHSC71458  Agrostis exarata Vernon H. Oswald; Lowell Ahart 1998-7-15 9273 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  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
  UCD163845  Agrostis exarata Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD66472  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC94417  Alisma triviale Lowell Ahart 2006-8-22 13231 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  POM313034  Alisma triviale H. L. Mason, Verne Grant 1946-9-5 13119 Colusa Road to Lake Co, 1.6 miles W of Williams. Comment
  UCD141857  Allium L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD82470  Allium Craig Thomsen; G. Harrington 2009-5-12 2847 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 707 Comment
  CAS-BOT-BC131915  Allium Roger Raiche 1985-3-19 RR 50160 Colusa Colusa-Lake County line, Walker Ridge, 3.4 miles south of north end of Barrel Springs Campground on Walker Ridge Road 1036 Comment
  UCD163212  Allium amplectens Craig D. Thomsen 2000-4-28 2198 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
  UCD163213  Allium amplectens Craig D. Thomsen 2000-4-28 2207 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
  UCD82515  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2873 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82518  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2875 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 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
  UCR261630  Allium amplectens Ann Howald 2003-3-26 2291 A Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  UCR44923  Allium amplectens L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  UCD141843  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  UCD141848  Allium cratericola L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa Lake - Colusa County Line: 3.0 miles toward Bartlett Springs from road junction. Leesville and Wilbur Springs. Comment
  CHSC100263  Allium falcifolium David Isle 1990-6-6 1518 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Lower Summit Valley, east edge of rock outcrop. MDMB. 1670 Comment
  CHSC90866  Allium falcifolium D. Isle 2003-6-25 217 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Rd. 16N03. 1767 Comment
  UCD141854  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
  UCD141788  Allium fimbriatum M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa Bear Valley Road (sign to Wilbur Springs) past fenced area after leaving junction of California 16 and 20. Comment
  CAS-BOT-BC135885  Allium fimbriatum subsp. purdyi A. A. Heller 1940-5-6 15579 Colusa Summit of the grade on State Highway #20, at the Lake County line. 232 Comment
  CAS-BOT-BC135889  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CAS-BOT-BC135891  Allium fimbriatum subsp. purdyi Lewis S. Rose 1936-4-27 36194 Colusa 22 mi. SW of Williams, Lake Co. - Colusa Co. boundary. 396 Comment
  RSA296770  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd. , 2 miles form jct with Hwy 20. 366 Comment
  UCD141782  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD141783  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD57626  Allium fimbriatum var. purdyi Michele Lanctot; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. 356 Comment
  SEINET3884504  Allium fimbriatum var. purdyi D. W. McNeal 1980-4-26 2317 Colusa Above Bear Valley Rd. 0.7 mi. nw. of the jct. of Hwy #20.; 0 Comment
  SEINET194917  Allium purdyi A. A. Heller 1942-5-29 16484 Colusa 1/2 mile east of the Lake County Line. Comment
  CHSC42240  Allium serra Curtis Williges 1986-4-5 20 Colusa Hwy 20, 3 mi e of jct Hwy 16. 335 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
  JEPS47562  Allium serra W. L. Jepson 1932-5-7 16262 Colusa valley 2 mi above Venado 304 Comment
  UC766754  Allium serra R. F. Hoover 1938-4-24 3216 Colusa w Arbuckle; Sand Creek foothills Comment
  HSC71314  Allium serra Thomas W. Nelson, Jane P. Nelson 1979-4-11 4611 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  UCD141798  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
  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
  UCD141825  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  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
  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
  CHSC90778  Allophyllum divaricatum D. Isle 2002-4-18 182 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, no. of Fouts Springs. 548 Comment
  CAS-BOT-BC230055  Allophyllum gilioides Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 853 Comment
  JEPS72 Image available Allophyllum gilioides subsp. gilioides W. L. Jepson 1932-5-7 16271 Colusa Lodoga; ; Lodoga, Colusa Co. 518 Comment
  CHSC86527  Allophyllum gilioides subsp. violaceum B. Castro 2003-3-18 1387 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 228 Comment
  JEPS73496  Alnus incana subsp. tenuifolia L. R. Heckard 1972-7-10 3112 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Springs (ca 10 mi w of Stonyford)) 1828 Comment
  JEPS75837  Alnus incana subsp. tenuifolia L. R. Heckard 1974-9-11 3942 Colusa e. Foutch Camp (near upper crossing of Trout Creek, Snow Mt.); Snow Mt. 1859 Comment
  UCD110015  Alnus rhombifolia G. F. Hrusa 1996-1-23 12630 Colusa Inner North Coast Ranges. Riparian area of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. 475 Comment
  CAS-BOT-BC137972  Alopecurus saccatus Roxana S. Ferris 1917-4-12 549 Colusa 4 miles east of Williams. 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
  CDA25631  Amaranthus blitoides G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14264 Colusa Sacramento Valley; Along River Road (generally following the Sacramento River), 8.4 miles north of Colusa. Comment
  UC727678  Amaranthus californicus Milo S. Baker 1946-9-5 11625 b Colusa 5 mi w Colusa (along hwy towards Williams) Comment
  CDA19687  Ambrosia confertiflora D. Brown 2001-10-17 PDR 024367 Colusa Northern California; Vicinity of Colusa 0 Comment
  CAS-BOT-BC55587  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Along Sycamore Slough. Stinchfield Ranch Comment
  CHSC94748  Ambrosia psilostachya Lowell Ahart 2006-9-26 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 1/2 miles east of Maxwell. 24 Comment
  JEPS110533  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC29712  Ammannia robusta K. R. Stern 1980-6-30 6650 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC94478  Ammannia robusta Lowell Ahart 2006-8-9 13142 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  POM134394  Ammannia robusta Roxana Stinchfield 1916-7-17 288 Colusa At Tule Levee, College City Comment
  RSA724959  Ammannia robusta L. Ahart 2006-8-9 13142 Colusa north side and just east of the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC213951  Amsinckia Roxana S. Ferris 1926-4-23 6414 Colusa At mountain house on the Williams-Stonyford Road Comment
  RSA0090976  Amsinckia intermedia R. R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455-4th Street. 18 Comment
  RSA0090975  Amsinckia intermedia Rick Lundquist 1979-4-14 24 Colusa Bear Valley Road, 3.9 miles north of State Route 20. 412 Comment
  UCD119708  Amsinckia intermedia David West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highway 16 and 20. 243 Comment
  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
  UC762196  Amsinckia lunaris R. F. Hoover 1938-4-23 3204 Colusa grade on Rumsey-Arbuckle Road Comment
  RSA0089733  Amsinckia lunaris J. P. Smith, T. Nelson, Jane Nelson 1978-4-2 9575 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  CHSC37413  Amsinckia lycopsoides R. A. Schlising; K. R. Stern 1980-5-5 3583 Colusa Colusa National Wildlife Refuge; southwest of Colusa; southwest corner of refuge, north of Ware Road. Comment
  UC1093625  Amsinckia lycopsoides Francia Chisaki, Gene B. Newcomb 1958-4-1 1096 Colusa on road to Lodoga and Wilbur Springs (0.5 mi nw of junction with Hwy 20) Comment
  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
  UC78279  Amsinckia menziesii var. menziesii Katharine Brandegee Colusa Eppersous Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD162976  Ancistrocarphus filagineus Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 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
  HSC47645  Ancistrocarphus filagineus J. P. Smith, J. O. Sawyer 1978-4-29 9791 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  CHSC79806  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2000-5-2 6693 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  CHSC105170  Angelica tomentosa B. Castro; L. P. Janeway 1999-7-5 1013 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
  UCD163218  Anthemis cotula Craig D. Thomsen 2000-5-11 2325 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66932  Anthemis cotula Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5081 Colusa BLM Payne Ranch. Lands to the SW of jct of Hwys 16 and 20. Northwestern part of ranch, along ridge trail on border of Lake and Colusa Counties. South of junction with trail that heads down to the headwaters of Thompson Creek. 633 Comment
  UCD164161  Anthriscus caucalis Craig Thomsen 2000-4-28 2269 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD83626  Anthriscus caucalis Adam Clause; with PLB 102 class 2010-5-2 5 Colusa Walker Ridge. Eaton Springs. 40 m south of the main road, on the flat valley floor at the edge of a creek. 709 Comment
  CHSC94883  Antirrhinum subcordatum Lowell Ahart 2006-6-11 12673 Colusa On the west side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS104394  Antirrhinum vexillocalyculatum subsp. intermedium Lowell Ahart 2003-7-14 10388 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 Comment
  JEPS127575  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Ranges: ~4 miles W of Stonyford; SE of curve at culvert crossing just E of old dumpsite road junction; uphill ~200' S of 18N01 in 2012 Mill Fire area chaparral. (Gilmore Peak 7.5' Quad.) Comment
  UCD123477  Antirrhinum virga A. M. Shapiro 1994-6-13 s.n. Colusa just north of Goat Mountain Rd. on Sullivan Ridge. 914 Comment
  UCD64506  Aphanes occidentalis Craig D. Thomsen 2000-3-31 2093 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CDA12100  Apiastrum angustifolium G. F. Hrusa 1989-5-7 6089 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3 miles upstream from junction with Stonyford-Lodoga Rd. Comment
  CHSC101627  Apiastrum angustifolium David W. Isle 2002-4-18 1656 Colusa Mendocino National Forest; N of Fouts Springs, n of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) N aspect of E drainage in chamise site burned during 8/8/01 Trough Fire and part of Hydromulch Soil Erosion Study Plot. 524 Comment
  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
  UCD82387  Apiastrum angustifolium Craig Thomsen; G. Harrington 2009-5-12 2830 b Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  CHSC79441  Apocynum cannabinum B. Castro; L. P. Janeway 2000-5-1 1105 a Colusa Vicinity of Sites, Pence Mtn, and Grapevine Creek. 335 Comment
  POM129769  Apocynum cannabinum Roxana Stinchfield 1916-7-8 s.n. Colusa Stinchfield Ranch, along Sycamore Slough 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
  UCD66955  Apocynum cannabinum Ellen Dean; Davis Botanical Society 2008-5-31 4999 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD64028  Aquilegia eximia Craig D. Thomsen 2000-5-11 2280 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  CAS-BOT-BC392020  Aquilegia eximia G. L. Stebbins 1972-6-25 9000 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  JEPS82549  Arabis glabra var. glabra L. R. Heckard 1983-7-27 6110 Colusa ca. 1/4 mi. w. Summit Springs (s. side Snow Mt.); Snow Mt. 1500 Comment
  JEPS80780  Arceuthobium abietinum L. R. Heckard and J. C. Hickman 1981-7-30 5753 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1600 Comment
  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
  JEPS81346  Arctostaphylos L. R. Heckard and J. C. Hickman 1982-7-6 5943 Colusa about 1/2 mi ne Summit Springs (e of trail, s side of mt.); Snow Mt. 1645 Comment
  RSA96755  Arctostaphylos canescens subsp. canescens P. C. Everett, E. K. Balls, George B. Everett 1954-10-17 20335 Colusa 2 miles SW of Trough Springs on road to Upper Lake from Stonyford. 1037 Comment
  CDA34806  Arctostaphylos canescens subsp. sonomensis Peter Warner 2010-5-16 153 Colusa Walker Ridge Road, ~18.4 km N of jct. with Hwy. 20, along E (Colusa Co.) side of road, on slopes above Zimory Canyon to the west, Trout Creek to the east, and adjacent slopes on both sides of the road. 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
  UCD67000  Arctostaphylos manzanita Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -c 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
  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
  CHSC92603  Arctostaphylos manzanita subsp. elegans D. Isle 2005-7-14 1153 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
  CAS-BOT-BC24377  Arctostaphylos manzanita subsp. manzanita Roxana Stinchfield 1916-6-18 308 Colusa The Timber - near College City. 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
  UCD163861  Arctostaphylos viscida Craig D. Thomsen 2001-5-31 2543 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD52647  Arctostaphylos viscida Roman Gankin 1958-4-26 292 Colusa In Leesville-Bartlett Springs road, ca. 2 miles west of junction of this road and Leesville-Wilbur Springs road, near Colusa-Lake County line, California. Comment
  CDA38841  Arctostaphylos viscida G. D. Barbe 1964-3-29 761 Colusa Three miles west of Bear Valley Road on Bartlett Springs Road at Lake/Colusa county line; west of Leesville. Comment
  CDA11231  Arctostaphylos viscida subsp. pulchella G. F. Hrusa 1989-2-11 5821 Colusa North Coast Ranges; Above Bear Creek, on Bear Valley Rd. approx. 1 mile N of Hwy 20. Comment
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  POM257214  Argemone munita subsp. rotundata Lincoln Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station 549 Comment
  UCR119181  Aristida ternipes var. gentilis Beecher Crampton 1963-6-11 6851 Colusa Sacramento Valley, About 10 miles west of Williams on Leesville Road, Three Sisters Mountain area. 198 Comment
  CHSC86126  Aristida ternipes var. hamulosa Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  UC650323  Aristida ternipes var. hamulosa Paul Pattengale 1940-12-17 Colusa approximately 12 mi w Williams Comment
  RSA757048  Aristolochia californica Rudolf Schmid 2010-3-13 2010 -6 Colusa Cache Valley, from sandy bank on west side of Highway 16 at edge of Foothill Woodland, a few kilometers north of county line. 169 Comment
  UC1950728  Aristolochia californica R. Schmid 2000-3-21 2010 -6 Colusa Cache Valley, on west side of HW 16, a few km north of county line Comment
  UCD66961  Arnica discoidea Ellen Dean; Davis Botanical Society 2008-5-31 5005 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1152 Comment
  CAS-BOT-BC82672  Arnica longifolia G. Thomas Robbins; L. R. Heckard 1956-7-25 3712 Colusa Along edge of Dark Hollow Creek (a tributary of Middle Fork Stony Creek), on southern flank of Snow Mt. East, 2011 Comment
  JEPS80772  Artemisia douglasiana L. R. Heckard and J. C. Hickman 1981-7-30 5743 Colusa along Trout Creek Trail (se side of Snow Mt.); Snow Mt. 1661 Comment
  UC71769  Artemisia douglasiana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD81224  Artemisia douglasiana Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5561 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Canyon to the south of Destanella Flat. 443 Comment
  SFV10912  Asclepias cordifolia M. L. Vincent 1968-6-6 791 Colusa 1.2 miles west from Stony Ford. 11 mile sign on trip down from Goat Mountain. 375 Comment
  CHSC71414  Asclepias fascicularis Vernon H. Oswald; Lowell Ahart 1998-7-15 9266 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  UCD82491  Asclepias fascicularis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5677 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
  JEPS80258  Asclepias fascicularis L. R. Heckard and J. Hickman 1980-9-15 5437 Colusa Summit Springs, n of road Snow Mt., Lake-Colusa County Boundary 1524 Comment
  UCD121316  Asclepias fascicularis Roy Y. Berg 1964-6-27 RYB 8179 Colusa Stonyford. Comment
  CHSC32768  Asclepias solanoana James Jokerst 1980-6-27 920 Colusa North Coast Ranges. Near Frenzel Creek Botanical Area. 609 Comment
  JEPS82548  Asclepias speciosa L. R. Heckard 1983-7-27 6111 Colusa slopes around Summit Springs (s flank of Snow Mt.); Snow Mt. 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
  CAS-BOT-BC478060  Asteraceae Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5035 Colusa Southern Northern Inner Coast Ranges, Snow Mountain, Summit Spring Trail, 1.4 km W of Snow Mtn West summit, 800 m N of Cedar Camp 1988 Comment
  SEINET12326957  Asteraceae Unknown 1978-1 12 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams 143 Comment
  CDA26624  Astragalus breweri T. C. Fuller 1958-4-17 Colusa 1 mile south of Lodoga. 0 Comment
  UCD104677  Astragalus clevelandii K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, U.S. #20. Comment
  CHSC112254  Astragalus gambelianus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18633 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC83408  Astragalus gambelianus Katharine Brandegee april 1889 Colusa Colusa Junction Comment
  UCD163330  Astragalus gambelianus Craig D. Thomsen 2009-5-3 2799 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  JEPS75764  Astragalus purshii var. tinctus L. R. Heckard and R. Bacigalupi 1976-9-6 4453 Colusa above Summit Springs (Snow Mt., Colusa-Lake County Line); Snow Mt., above Summit Springs 1645 Comment
  SEINET4673433  Astragalus rattanii Richard R. Halse 2013-3-27 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53.; 0 558 Comment
  CAS-BOT-BC193116  Astragalus rattanii var. jepsonianus Aaron Liston; Sara Meury 1988-5-31 751 -1 Colusa Bear Valley; 8.1 miles N of Hwy 20 400 Comment
  HSC48165  Astragalus rattanii var. jepsonianus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3929 Colusa Along Bear Valley Rd. 2 mi. from junction with State Route 20 366 Comment
  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
  RSA424724  Astragalus rattanii var. jepsonianus Aaron Liston, M. Blumler 1987-4-26 667 -3 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  RSA515105  Astragalus rattanii var. jepsonianus Aaron Liston, Sara Meury 1989-4-13 709 -3 Colusa 2.8 miles NE of Middletown. Hwy 29 300 Comment
Read comments
Aug 20 2014
  UC1181547  Astragalus rattanii var. jepsonianus R. F. Hoover 1941-5-2 4986 Colusa on Williams--Clear Lake Highway just e Lake Co. line; Williams--Clear Lake Highway Comment
  UCD105309  Astragalus rattanii var. jepsonianus J. M. Tucker 1978-5-6 4406 Colusa On east side of Bear Valley Road, flat valley floor of Bear Valley. 10.6 miles (by road) north of junction with State Highway 20. 365 Comment
  UCD105314  Astragalus rattanii var. jepsonianus J. M. Tucker; Dorothy Dreyfus 1967-4-29 4034 Colusa Bear Valley, 9 miles north of junction of Bear Valley Road with State Highway 20. 403 Comment
  UCR212339  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS53235  Athysanus pusillus Alice King May, 1906 Colusa College City Comment
  SEINET4673879  Athysanus pusillus Richard R. Halse 2013-3-27 8763 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
  UCD72509  Atriplex Craig D. Thomsen 2008-3-30 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 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
Read comments
Jun 8 2011
  CHSC107933  Atriplex depressa B. Castro; L. Janeway 2011-7-9 1894 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. In swale about 400 ft north of large +- alkaline marsh; and widely scattered in very small patches along NW edges of marsh.. 49 Comment
  UC205343  Atriplex persistens H. M. Hall 1920-7-12 11012 Colusa w Princeton; w of Princeton Comment
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC72556  Atriplex serenana var. serenana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  SEINET3919631  Avena barbata J. P. Smith, Thomas Nelson; Jane P. Nelson 1978-4-2 9559 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20.; 0 366 Comment
  CHSC86015  Avena fatua Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  UCD66444  Avena fatua Craig D. Thomsen 2000-4-28 2213 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD57655  Baccharis pilularis Hildegarde Durkin; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Where trail crosses Thompson Creek. 374 Comment
  HSC79084  Baccharis salicifolia C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 30 Colusa Mendocino National Forest, Digger Pine Campground, 10 miles SW of Stonyford via Lodoga-Stonyford and Goat Mtn. Rd. 457 Comment
  HSC87058  Baccharis salicifolia Pat Daly, Rudy Galindo 1988-4-16 53 Colusa 3.7 miles west on Goat Mountain Rd. off of Lodoga-Stonyford Rd. to Digger Pine Campground; Stony Creek, .5 mile from campground 452 Comment
  SEINET7239582 Image available Baccharis salicifolia R. R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20, ca. 7.8 miles NE of its junction with State Hwy. 16 at base of Salt Canyon 100 Comment
  CAS-BOT-BC100067  Balsamorhiza macrolepis B. Castro; B. Corbin; K. Earll; L. Hanson; D. Isle; L. P. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and 716 Comment
  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
  CDA2974  Bassia hyssopifolia Margaret Bellue Oct 1932 Colusa Near Williams. 0 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
  POM288398  Blennosperma nanum Lyman Benson 1935-3-27 6332 Colusa 6 miles west of Williams. 213 Comment
  CHSC96369  Boehmeria cylindrica D. Koenig; L. Bateman 2006-10-13 Colusa Sacramento Valley. By a slough along the west side of the Sacramento River, about 0.5 mi south-southeast of Stegeman. 21 Comment
  RSA0105548  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
  CHSC101411  Bolboschoenus glaucus David Isle 2007-5-1 1574 Colusa SE of Maxwell about 4 miles in riparian natural area just west of irrigation canal and 'Lakeland' rice fields farmed by William Dirks and Jack Barrett. (Across footbridge S of third Landing curve.) 30 Comment
  CHSC107126  Bolboschoenus glaucus L. P. Janeway; B. Castro 2011-5-19 10286 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.3 km northeast of Tehama-Colusa Canal. East edge of the marsh. 49 Comment
  CHSC83230  Bolboschoenus glaucus June McCaskill; Harvey, Loren Davis 1954-8-9 361 Colusa Ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. In rice plot. Comment
  CAS-BOT-BC31371  Bolboschoenus maritimus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 467 Colusa Davis tule, near Sycamore Slough Comment
  CAS-BOT-BC31370  Bolboschoenus maritimus Roxana S. Ferris 1926-4-22 6283 Colusa Roadside ditch 3 miles west of Colusa. Comment
  CHSC107167  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-4-27 10245 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. In 6-10 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  UCD163914  Bolboschoenus maritimus subsp. paludosus Sara Martin 2016-4-9 6 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella Flat, just south Hwy 20. 550 Comment
  UCR206359  Brassica George K. Helmkamp, E. A. Helmkamp 2009-3-11 14384 Colusa Sacramento Valley, along CA-20 at Lone Star Road, northeast of Williams 13 Comment
  UCR206291  Brassica juncea George K. Helmkamp, E. A. Helmkamp 2009-5-20 14737 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  UCD82536  Briza maxima Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCSC001479  Briza minor Peter Kamb 1950-1 1696 Colusa Stonyford Comment
  POM169614  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa Near College City. Comment
  HSC3023  Brodiaea elegans subsp. elegans Annetta Carter 1953-6-20 3240 Colusa Near summit E of Hough Springs on Bartlett Springs Rd. Comment
  CAS-BOT-BC144360  Bromus William Bancroft 1958-7-5 s.n. Colusa Summit of Snow Mountain, Colusa-Lake County line. Comment
  HSC45720  Bromus arenarius M. Alcasas 1978-4-22 47 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC117405  Bromus catharticus B. Castro; Tom Boullion 2008-7-10 1765 Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, on W bank of the Sacramento River near Moon Bend Rd. at RM 141.4, just off Moon Bend Rd. 18 Comment
  JEPS81283  Bromus diandrus L. R. Heckard and J. C. Hickman 1982-7-5 5894 Colusa s side of Snow Mountain, Summit Springs Summit Springs; Snow Mountain, Summit Springs 1500 Comment
  UCD57551  Bromus diandrus Cindy Yip; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  CAS-BOT-BC155497  Bromus hordeaceus Roxana S. Ferris 1917-4-17 613 Colusa Sycamore Slough. Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 Comment
  UCD37832  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. Comment
  UCD58684  Bromus hordeaceus A. A. Beetle 1942-5-21 3272 Colusa 12 miles north of Williams. Comment
  UCD58711  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. Comment
  UCD66687  Bromus laevipes Craig D. Thomsen 2000-5-11 2315 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
  HSC23360  Bromus madritensis subsp. rubens J. D. Dagray 1970-4-4 3 Colusa 10 mi. W of Williams on Hwy. 20 122 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
  RSA724142  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET5320896  Bromus rubens Unknown 2002-3-21 6130 Colusa Williams; By junction of 5th Street and B Street 20 Comment
  JEPS80193  Bromus tectorum L. R. Heckard and J. Hickman 1980-7-3 5346 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw Snow Mountain); Snow Mountain 1548 Comment
  UCD59764  Bromus tectorum Beecher Crampton 1958-5-19 4808 Colusa West of Lodoga. 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-BC273300  Cacaliopsis nardosmia J. M. Tucker; John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout and Upper Letts Valley (ca. 2 1/2 miles, airline, north of the lookout), Goat Mountain 1524 Comment
  UCD129652  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3519 Colusa Trough Spring, at northeast end of Trough Spring Ridge, ca. 5.75 miles (airline) southwest of Stonyford. 975 Comment
  CDA42953  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa Inner North Coast Range; On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. Comment
  RSA0115082  Calandrinia breweri Lowell A. Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  HSC72159  Calandrinia ciliata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9534 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SEINET3872957  Calandrinia ciliata Richard R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca 10 miles north of Colusa (junction of State Hwys. 45 & 20).; 0 22 Comment
  UCD100196  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. Comment
  UCD82342  Calandrinia ciliata Robin McMaster 1973-4-15 332 Colusa middle of Bear Valley. Comment
  RSA135689  Callitriche marginata A. A. Heller, H. E. Brown 1902-5-2 9382 Colusa Princeton. Comment
  CHSC79618  Calochortus amabilis B. Castro; L. P. Janeway 2000-5-3 1126 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  UC1049549  Calochortus amabilis Rimo Bacigalupi 1950-4-16 3110 Colusa e outskirts Stony Ford (town) (vicinity of Colusa-Glenn County line); Inner North Coast Ranges Comment
  UC843630  Calochortus amabilis Lewis S. Rose 1936-4-27 36196 Colusa 22 mi sw Williams 396 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
  CAS-BOT-BC492124  Calochortus amabilis Roxana S. Ferris 1926-4-23 6447 Colusa Grapevine grade between Stonyford and Sites Comment
  CDA39298  Calochortus amabilis T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  RSA0014524  Calochortus amabilis Joan Stewart 1998-6-10 759 Colusa Bear Valley Comment
  CHSC78346  Calochortus luteus Vernon H. Oswald 2000-5-11 9917 Colusa Brim Rd. 1.5 mi west of Bear Valley Rd. 446 Comment
  JEPS122381  Calochortus luteus Nisrine Machaka-Houri with Gracie Benson-Martin 2014-5-3 NG 1 Colusa Bear Valley Road Comment
  UCD139535  Calochortus luteus Grady L. Webster 1977-5-15 7679 Colusa Bear Creek, ca. 0.5 mile west of junction of Wilbur Springs Road and Rtw. 20. 350 Comment
  CHSC2243  Calochortus splendens D. Smith 1935-5-12 Colusa Stonyford Hills. 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
  RSA304209  Calochortus uniflorus James R. Shevock 1972-3-25 1449 Colusa Bear Valley. 396 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
  UCD63912  Calycadenia fremontii Craig D. Thomsen 2000-6-23 2401 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UC1971752  Calycadenia micrantha R. L. Carr 1994-9-23 2656 Colusa Wilson Camp, SE of Stoneyford, near the Colusa/Lake county line, ca. 3 air mi SE of Goat Mountain Comment
  CHSC112620  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC1552845  Calycadenia pauciflora Frederica Bowcutt 1985-6-19 605 Colusa just sw, n of Wilbur Hot Springs about 2 air miles Bear Valley Comment
  UC89057  Calycadenia pauciflora T. S. Brandegee May 1884 Colusa near Mountain House; West Colusa County Comment
  UCD63726  Calycadenia pauciflora Craig D. Thomsen 2008-5-23 2737 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  UCR261752  Calycadenia pauciflora Ann Howald 2003-5-29 2351 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  CAS-BOT-BC270747  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Creek Trail, 0.5 mile NW of driveway to Fout Springs Boy's Ranch 502 Comment
  CAS-BOT-BC270752  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa Bear Valley Road, 0.1 mile N of junction with Brim Road (to Bartlett Springs), ca. 2 miles SW of Leesville Comment
  CAS-BOT-BC270815  Calycadenia pauciflora A. A. Heller 1919-6-8 13239 Colusa Near Lodoga Comment
  RSA255611  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 mile south of Stoneyford on road to Lodoga 366 Comment
  RSA788192  Calycadenia pauciflora R. L. Carr 1978-8-20 2155 Colusa Brim Rd (to Bartlett Spr.), 1.5 mi W of jct with Bear Valley Rd, ca. 3.6 mi SW of Leesville, (=GDC 652). 482 Comment
  UC1876260  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 mi W of Stoneyford on road to Fout Spring. 609 Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UCD129837  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile east of Lake County line on Bartlett Springs Road. Comment
  UCD129891  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 miles southwest o Leesville on road to Bartlett Springs. Comment
  UCSB6412  Calycadenia pauciflora Keator, Glenn 1958-6-16 Colusa Along road from Lower Lake to Sacramento Valley just east of Lake-Colusa county line Comment
  UCD81713  Calycanthus occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5719 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
  UCD82572  Calycanthus occidentalis Craig Thomsen 2008-6-12 2763 Colusa Walker Ridge, Elgin Mine area. Comment
  UCD100385  Calyptridium monospermum M. Vincent 1968-6-6 780 Colusa Goat Mt. Road. 1 mile from Stanford turnoff. 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
  HSC72507  Calyptridium quadripetalum Thomas W. Nelson, Jane P. Nelson 1980-6-24 5880 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  JEPS80189  Calyptridium quadripetalum L. R. Heckard and J. Hickman 1980-7-3 5340 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw of Snow Mountain) 1548 Comment
  UCD163878  Calystegia collina Craig D. Thomsen 2001-5-24 2534 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  HSC41916  Calystegia collina subsp. collina M. A. Baker 1977-4-24 225 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD163873  Calystegia collina subsp. collina Craig D. Thomsen 2000-5-11 2307 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1.5 mile west of Hwy 20/16 instersection. Comment
  UCR138664  Calystegia collina subsp. collina B. Ellyson, J. Hooke, D. Newman 1996-5-4 38 Colusa Wilbur Springs, Walker Ridge Road. 8.4 mi north of alker Ridge Road and Indian Reservoir Road intersection on Walke Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  UCSB4973  Calystegia occidentalis Keator, Glenn 1958-6-16 Colusa Foothills west of Bartlett Springs Comment
  JEPS81301  Calystegia occidentalis subsp. occidentalis L. R. Heckard and J. C. Hickman 1982-7-5 5915 Colusa slope below Summit Springs, S side Snow Mountain Comment
  UCD164158  Calystegia subacaulis Craig Thomsen 2000-4-28 2266 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD138336  Camassia leichtlinii subsp. suksdorfii J. M. Tucker; L. K. Mann 1959-5-30 3531 Colusa on small lake in Mill Valley, around 1/4 mile northwest of Lower Letts Valley, and around 4 miles, airline, north of Goat Mountain Lookout. 1219 Comment
  HSC45719  Camissonia contorta Sheila Logan 1978-4-22 27 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC45729  Camissonia ignota Mark Flippo 1978-4-22 15 Colusa Bear Valley Rd., 1.5 mi. from its jct. with Hwy. 20 412 Comment
  UCD82382  Camissoniopsis intermedia Craig Thomsen; G. Harrington 2009-5-12 2823 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  CHSC112275  Campanula angustiflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18653 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
  CHSC112316  Campanula griffinii Lowell Ahart 2013-5-1 18690 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
  UCD66822  Campanula griffinii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Destanella Flat-Walker Ridge. 450 Comment
  JEPS80202  Capsella bursa-pastoris L. R. Heckard and J. Hickman 1980-7-3 5357 Colusa 10 mi w of Stonyford (around Summit Springs, sw flank of Snow Mountain); Snow Mountain 1548 Comment
  JEPS117891  Cardaria draba David Isle 2007-4-13 1633 Colusa E of Maxwell 1 mi S of Maxwell Rd. & E of Lyons Rd. in ditch between rice fields E of William Dirk's shop Sacramento River Watershed 100 Comment
  CDA6843  Carduus acanthoides G. D. Barbe, N. Palmer 1982-6-4 3639 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  CDA15499  Carex G. F. Hrusa, T. D. Wilfred 1998-6-19 14636 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  SEINET10644548  Carex Roxana S. Ferris 1917-4-17 Ferris 607 Colusa Moist earth in an oak grove. Sycamore Slough. Comment
  JEPS75133  Carex athrostachya L. R. Heckard 1972-7-8 3040 Colusa N side Snow Mountain (West Peak) 2011 Comment
  UC767029  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek Comment
  CHSC94429  Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS81293  Carex densa L. R. Heckard and J. Hickman 1982-7-5 5905 Colusa Slope below (S of) area. Summit Springs, S side of Snow Mountain 1500 Comment
  SEINET7556704 Image available Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1563913  Carex fracta Barbara Ertter 1989-7-1 8610 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 Comment
  CAS-BOT-BC28168  Carex hoodii L. R. Heckard 1972-7-10 3114 Colusa Trout Creek crossing of trail to Box Spring, Snow Mt. Comment
  JEPS80866  Carex hoodii L. R. Heckard and J. C. Hickman 1981-7-31 5778 Colusa near Fouts Springs Overlook (e side of Snow Mt.); Snow Mt. 1798 Comment
  JEPS80857  Carex jonesii L. R. Heckard and J. C. Hickman 1980-9-16 5458 Colusa cirque area between peaks, ne slope of West Peak Snow Mt., West Peak 2011 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
  JEPS75130  Carex luzulina var. luzulina L. R. Heckard 1972-7-8 3041 Colusa north side of ridge running southeast of Snow Mt., West Peak 2011 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
  UCD163311  Carex praegracilis Craig D. Thomsen 1997-4-13 1899 Colusa Bear Valley. About 6 miles north of Hwy 20. Southwest of old corral area (USGS Topo Map), where road takes a 90 degree turn to the north. Comment
  UCD61461  Carex praegracilis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3907 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCR228283  Carex praegracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4947 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 399 Comment
  CAS-BOT-BC118348  Carex praegracilis Roxana S. Ferris 1917-4-17 625 Colusa Under trees, Sycamore Slough. Comment
  UCD140770  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  CHSC91581  Carex serratodens Barbara L. Wilson; R. Brainerd, D. Isle, L. Janeway, M. Mooers 2002-6-28 10703 Colusa Kanaka Glade; UTM 10S 536346e 4339859n. 986 Comment
  CHSC94852  Carex serratodens Lowell Ahart 2006-6-11 12669 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UCD67060  Carex serratodens Craig D. Thomsen 2008-3-20 2716 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 600 Comment
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82720  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  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
  UCR228280  Carex serratodens Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4946 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 399 Comment
  JEPS80854  Carex subfusca L. R. Heckard and R. C. Bacigalupi 1976-9-6 4443 Colusa ne side of Fouts Camp promontory Snow Mt., Fouts Camp promontory 1859 Comment
  JEPS80885  Carex subfusca L. R. Heckard and J. C. Hickman 1980-9-16 5451 Colusa first meadow along trail from Frog Pond (e of West Peak); Snow Mt. 1981 Comment
  CDA15498  Carex tumulicola G. F. Hrusa, T. D. Wilfred 1998-6-19 14635 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  CHSC82975  Carex tumulicola Barbara Wilson; R. Brainerd, L. Janeway, D. Isle, M. Mooers 2002-6-28 10705 Colusa High North Coast Ranges. Near Ellen Spring; north side of Road 24N02 0.2 km south of junction with Goat Mountain Road. At base of road fill. 1052 Comment
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
Read comments
Mar 2 2015
  HSC44462  Castilleja applegatei subsp. martinii R. York, Advanced Plant Taxonomy Lab 1978-4-22 131 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS124243  Castilleja applegatei subsp. martinii Lowell Ahart 2015-4-10 20013 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  JEPS73456  Castilleja applegatei subsp. pinetorum L. R. Heckard 1972-7-8 3058 Colusa Dark Hollow Creek, upper reaches, in saddle between East and West Peaks of Snow Mountain Snow Mountain 1981 Comment
  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
  CHSC81307  Castilleja attenuata J. Trizzino 2001-3-31 16 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  UC719289  Castilleja attenuata F. G. Meyer 1938-4-5 1348 Colusa about 20 mi n Williams Comment
  UCD122327  Castilleja attenuata Alpaslan Ongun 1961-4-16 38 Colusa South of wooden bridge; in Bear Valley, ca. 8 miles north of State Highway 20. Comment
  CHSC27851  Castilleja exserta Susan Perkins 1978-4-8 33 Colusa Meadow ca. 3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UCR37943  Castilleja exserta Mike Malamus, P. Williams, Brian Kearney 1984-4-29 70 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  UCD15433  Castilleja exserta Lisa Montang 1985-4-13 1 Colusa Colusa Co.; 3.8 miles north of Bear Valley Road and Highway 20 intersection; 390 Comment
  UCD15677  Castilleja exserta Anne B. Overturf 1989-4-8 13 Colusa Lake County border. Walker Ridge. 658 Comment
  CHSC89874  Castilleja exserta subsp. exserta B. Castro; S. Innecken 2001-3-26 1218 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. On top of small knoll. 91 Comment
  JEPS10303  Castilleja exserta subsp. exserta W. L. Jepson 1932-5-8 16282 Colusa Stonyford 365 Comment
  UCD64254  Castilleja exserta subsp. exserta Craig D. Thomsen 2000-3-31 2055 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR47925  Castilleja exserta subsp. exserta Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 mi north of State Hwy 20 Comment
  HSC85948  Castilleja exserta subsp. exserta Michalski, Raum, Hopson 1987-4-21 58 Colusa Leesville Rd. 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
  JEPS120991  Castilleja foliolosa Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18642 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
  JEPS82554  Castilleja miniata L. R. Heckard 1983-7-27 6101 Colusa ca 2 mi w Stonyford road; Little Stony Creek 411 Comment
  JEPS82029  Castilleja miniata Todd Keeler-Wolf 1983-6-22 715 Colusa 2 mi up Goat Mt. road; Little Stony Creek 411 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
  UCR40060  Castilleja rubicundula subsp. lithospermoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 27 Colusa Bear Valley, Brim Road, 2.9 mi west of Leesvillle-Lodoga Junction 418 Comment
  UCD123056  Castilleja rubicundula subsp. lithospermoides Barrie Stanford 1966-4-16 27 Colusa Bear Valley, 5 miles north of Wilbur Springs. Comment
  CHSC112315  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2013-5-1 18687 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
  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
  UCD170130  Caulanthus lasiophyllus Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  UCD67002  Caulanthus lasiophyllus Craig D. Thomsen 2008-5-23 2748 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  CAS-BOT-BC48828  Ceanothus cuneatus Brandegee 1889-4-1 101 Colusa Leesville Comment
  CHSC22526  Ceanothus cuneatus Robert A. Schlising; Glenn Keator 1962-1-21 2032 Colusa Steep adobe bank and open hills. 548 Comment
Read comments
Mar 26 2014
  RSA399079  Ceanothus cuneatus Carolyn Sanford 1977-4-24 352 Colusa Above Barrel Springs Campground. 701 Comment
  UCR206372  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14369 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCD170264  Ceanothus integerrimus D. O. Burge 2016-11-3 2188 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 980 Comment
  UCD82544  Ceanothus integerrimus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5699 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  UCD112067  Ceanothus jepsonii D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  RSA712418  Ceanothus jepsonii subsp. albiflorus C. L. schmidt 1989-5-6 1249 Colusa 1 mile up dirt road to Trout creek near Davis Campsite and Fouts Springs Campground, 9 miles W of Stonyford. Serpentine of E side of Snow Mtn. 600 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  CHSC79559  Ceanothus jepsonii var. albiflorus L. P. Janeway 2000-5-31 6775 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
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  HSC60452  Ceanothus jepsonii var. albiflorus J. P. Smith 1977-4-24 9036 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 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
  UCD163227  Centaurea melitensis Craig D. Thomsen 2000-6-23 2407 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
  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
  SEINET251844  Centaurea solstitialis L. Shultz, J. Shultz 1986-9-20 10225 Colusa Ca. 10 miles west of Colusa on Highway 20 Comment
  UCD82829  Centaurea solstitialis Gina Darin; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  UCR201558  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14255 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  SEINET11860767  Centaurea solstitialis C. L. Abbott 1926-6-27 s.n. Colusa Colusa Comment
  UCD82577  Centaurium Craig Thomsen 2008-6-12 2767 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  UCR227905  Centaurium trichanthum Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5060 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 555 Comment
  CDA39705  Centaurium trichanthum Larry Norris 1975-7-2 s.n. Colusa Bear Valley. 0 Comment
  UCD82477  Centromadia Craig Thomsen; G. Harrington 2009-5-12 2855 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD20134  Centromadia Donald W. Kyhos 1962-8-4 62 -184 Colusa 5.4 miles east of Colusa County line on Hwy 99. Comment
  UCD63776  Centromadia parryi subsp. parryi Craig D. Thomsen 2008-5-31 2757 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  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
  JEPS118719  Centromadia parryi subsp. rudis B. Castro with Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UC1069558  Centromadia parryi subsp. rudis H. S. Yates 1936-8-14 17575 Colusa 3 mi s Colusa 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
  UC931956  Cephalanthus occidentalis var. californicus Verne Grant and Alva Grant 1946-8-6 7839 Colusa near Colusa (Butte Creek bank, 1 mi n of Butte Outing Gun Club); Butte Creek Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. Comment
  JEPS80442  Cerastium glomeratum L. R. Heckard and J. Hickman 1980-7-3 5372 A Colusa s.w. slope of Snow Mt. (about Summit Springs) 1554 Comment
  UCD58094  Cerastium glomeratum Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3471 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
  HSC31623  Cercis occidentalis Glenn McGourty 1974-4-20 7 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
Read comments
Aug 13 2014
  HSC66011  Cercis occidentalis Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 46 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  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
  UCR206399  Cercis occidentalis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14378 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  UCR37606  Cercis occidentalis C. Houseman, M. A. Strull, L. Linstedt 1984-4-29 14 Colusa Bear Valley Rd., 2 mi north of Hwy 20 366 Comment
  CHSC79561  Cercocarpus betuloides var. betuloides B. Castro; L. P. Janeway 2000-5-4 1131 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 268 Comment
  UC1543051  Cercocarpus betuloides var. betuloides Donald G. Nelson et. al. 1940-6-8 679 Colusa several mi above Bonnie View (w boundary of Snow Mountain, Snow Mountain Trail); Snow Mountain, Snow Mountain Trail 1066 Comment
  JEPS15566  Chaenactis douglasii var. douglasii G. Thomas Robbins with L. R. Heckard 1956-7-25 3715 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, s flank of Snow Mt. East, between Snow Mt. East and Snow Mt. West); Snow Mt. East, Middle Fork Stony Creek 1981 Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain Comment
  UCD159334  Chaenactis glabriuscula D. S. Park; E. Dean 2010-6-5 118 Colusa Walker ridge, Cold Spring Mt. Exposed serpentine outcrop. 1032 Comment
  UCD57299  Chaenactis glabriuscula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3670 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  JEPS90921  Chamaesyce hooveri Dean W. Taylor 1993-8-31 14071 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  JEPS2596  Chamaesyce ocellata subsp. rattanii Volney Rattan June 1884 Colusa n San Francisco Bay; Coast Mts., Stony Creek; Stony Creek, Colusa Co., N of San Francisco Bay Comment
  CHSC84965  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2003-10-23 10665 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
  CHSC94311  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13104 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  JEPS15549  Cheilanthes gracillima G. Thomas Robbins with L. R. Heckard 1956-7-25 3706 Colusa due s of Snow Mt East (and skirting e base of ridge forming Snow Mt West) 1981 Comment
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  RSA724893  Chenopodium album L. Ahart 2006-8-22 13221 -A Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA724958  Chenopodium botrys L. Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  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
  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
  UCD66481  Chenopodium californicum Craig D. Thomsen 2000-4-28 2225 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Under massive valley oak, adjacent to Bear Creek at base of Hwy 20 fill-slope. 300 Comment
  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
  SFV10852  Chimaphila menziesii M. L. Vincent 1968-6-6 788 Colusa 1 mile east of sign of 16 miles to Stony Ford on trip back from Goat Mountain. 550 Comment
  UCD57921  Chloris gayana Beecher Crampton 1958-6-27 4980 Colusa 2.5 miles south of Grimes. Comment
  CHSC77630  Chlorogalum pomeridianum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  UCD63102  Chlorogalum pomeridianum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4933 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
  CDA39316  Chlorogalum pomeridianum T. C. Fuller 1958-5-27 3661 Colusa South of Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  CHSC32967  Chorizanthe membranacea C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 52 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  CHSC86512  Chorizanthe membranacea B. Castro 2003-3-18 1390 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  UCD57280  Chorizanthe membranacea Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3648 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  JEPS81288  Cirsium cymosum var. cymosum L. R. Heckard and J. C. Hickman 1982-7-5 Colusa s side Snow Mt. (Summit Springs, slope below (s of) area); , Summit Springs 1500 Comment
  UC71781  Citrullus colocynthis var. lanatus H. P. Chandler Oct. 1905 Colusa Princeton Comment
  UCD57862  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 49 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  CHSC32911  Clarkia affinis C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 55 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  JEPS105670  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate 124 Comment
  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
  POM216174  Clarkia concinna subsp. concinna D. D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  UCD104545  Clarkia gracilis K. Esau 1934-5-5 s.n. Colusa West of Williams, Tahoe-Ukiah Highway. Comment
  JEPS105736  Clarkia gracilis subsp. albicaulis David Gowen 2004-5-18 88 Colusa South of Stonyford. Approx. 7/10 mile along Goat Mt. Road from its junction with the paved road to Stonyford. Comment
  SEINET12193550  Clarkia gracilis subsp. albicaulis R. A. DeMartile 1983-1 107 Colusa Bartlett Springs Road N of Baldy Mountain 762 Comment
  CHSC89611  Clarkia gracilis subsp. gracilis B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1445 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 176 Comment
  CHSC89885  Clarkia gracilis subsp. gracilis B. Castro; Shirley Innecken 2001-4-27 1240 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. Adjacent to dirt road paralleling N-S-trending creek. In opening on low terrace. 332 Comment
  UCD63108  Clarkia gracilis subsp. gracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4939 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  RSA41127  Clarkia gracilis subsp. gracilis Robert F. Hoover 1938-4-24 3231 Colusa Stone Corral Canyon below Sites. Comment
  CHSC112017  Clarkia gracilis subsp. sonomensis David Isle; F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of jct w/ Lodoga-Stonyford Road. 408 Comment
  UCD70216  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  HSC86833  Clarkia purpurea S. L. Steinwert 1985-4-13 10 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  CAS-BOT-BC240292  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs 817 Comment
  UC2014170  Clarkia purpurea subsp. quadrivulnera Ellen Dean, G. Harrington, C. Thomsen, Chiao-Yi Cheng, R. Wilmarth 2009-5-20 5650 Colusa Colusa County: 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. Comment
  UCD146723  Clarkia rhomboidea G. F. Hrusa 1998-6-19 14604 Colusa above upper Little Stony Creek. Goat Mountain Road around 2 km west of campground. 490 Comment
  RSA537479  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 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
  CDA11391  Claytonia exigua G. F. Hrusa, K. van Katwyk 1995-4-22 12111 Colusa Inner North Coast Ranges; Approximately 5 m. N of intersection of Walker Ridge Road and Highway 20. Comment
  CDA14915  Claytonia exigua G. F. Hrusa 1993-5-2 10855 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Mouth of Frenzel Creek. Comment
  CHSC115386  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  UCSC010465  Claytonia exigua subsp. exigua Dylan M. Neubauer, Tim Forsell 2016-3-31 600 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  JEPS86633  Claytonia exigua subsp. exigua L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6693 Colusa w of Summit Springs (near road, sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1550 Comment
  CDA12162  Claytonia parviflora G. F. Hrusa 1989-5-7 6090 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3 miles upstream from junction with Stonyford-Lodoga Rd. Comment
  UC1745698  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1379 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UCD65634  Claytonia perfoliata Craig D. Thomsen 2000-4-12 2137 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-BC440035  Claytonia perfoliata subsp. perfoliata Roxana S. Ferris 1926-4-21 6311 Colusa Sycamore Slough near Sycamore 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
  RSA114165  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Summit of Goat Mtn, Mendocino National Forest, lake - Colusa Boundary. 1865 Comment
  UCD100555  Claytonia saxosa A. M. Shapiro 1994-6-12 s.n. Colusa at road junction just below summit of Goat Mountain. Comment
  SFV8355  Clematis lasiantha D. Grau 1972-4-1 4 Colusa Highway 16, 5 miles south of junction with Highway 20. Comment
  CAS-BOT-BC92546  Clematis ligusticifolia A. F. Hough 1924-6-22 3 Colusa California Forest. McDaniels R.S. 914 Comment
  CHSC111245  Clematis ligusticifolia B. Castro 2008-7-10 1773 Colusa Sacramento Valley. Along S bank of Sacramento River, ca 5 mi N of town of Colusa, just N of Reservation Road; in undesignated section near Colusa Rancheria. 18 Comment
  POM149762  Clematis ligusticifolia Roxana Stinchfield 1916-7-8 388 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UCD95592  Clematis ligusticifolia 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
  POM257147  Collinsia bartsiifolia var. bartsiifolia E. K. Crum 1938-5-8 2020 Colusa 3 miles north of Leesville. 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
  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
  UCSB63619  Collinsia grandiflora Maslin, Linyi 1981-4-15 Colusa Ca. 0.5 km w of jct of Hwys 20 & 16; s side of Bear Creek; Ca. 27 km sw of Williams; Wilbur Springs Quadrangle, 15'; S central border of Sect. 36. T14N, R5W 319 Comment
  UCD66680  Collinsia greenei Craig D. Thomsen 2000-5-11 2304 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
  CHSC1731  Collinsia heterophylla V. Holt 1946-4-18 Colusa Cashe Creek. Comment
Read comments
Mar 2 2015
  UC1613286  Collinsia heterophylla Charles M. Belshaw Apr 1937 2884 Colusa vicinity of Cook's Spring (Inner North Coast Range, Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  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
  UCD58103  Collinsia sparsiflora Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3350 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 536 Comment
  CDA34091  Collinsia sparsiflora P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC70908  Collinsia sparsiflora var. arvensis Vernon Oswald; Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodga Rd. 4.2 mi south of Stonyford. 384 Comment
  UC725923  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa 13 mi w of Williams (on State Highway #20) Comment
  UCD58120  Collinsia sparsiflora var. arvensis Ellen Dean; PLB 102 Class 2007-4-29 3716 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. 304 Comment
  POM273490  Collinsia sparsiflora var. arvensis Lyman D. Benson 1933-4-16 4332 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  HSC44465  Collinsia sparsiflora var. collina R. York 1978-4-22 140 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 409 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
  CHSC70989  Collomia diversifolia Vernon Oswald; Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. At roadside. 524 Comment
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  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
  CHSC64135  Collomia tinctoria David Isle 1992-8-3 Colusa Snow Mountain. Just west of the helispot. Comment
  RSA113933  Collomia tinctoria H. K. Sharsmith 1953-7-1 4402 Colusa Linger Longer Camp, Goat Mountain, Mendocino National Forest 1585 Comment
Read comments
Jun 30 2012
  UC1051512  Collomia tinctoria Helen K. Sharsmith 1953-7-1 4402 Colusa Linger Longer Camp Inner North Coast Ranges, Mendocino National Forest (Goat Mountain) 1584 Comment
  CHSC13499  Convolvulus arvensis L. V. Ritter 1969-4-30 217 Colusa Ca 6 mi. sw of Williams, w side of Highway 20. Comment
  NY643135  Convolvulus arvensis R. J. Stinchfield 1916-7-8 401 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UCR205139  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14243 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  CHSC67605  Cordylanthus palmatus James D. Jokerst 1988-8-23 3039 Colusa Colusa National Wildlife Refuge S of Willows, in Pond 3, E and adjacent to Ohm Rd. in southern-most cell E of the road. Comment
  JEPS99065  Cordylanthus palmatus Dean W. Taylor 1988-8-8 10024 Colusa Colusa National Wildlife Refuge, far southeastern corner of Ohm Rd, 1 mi n of Ware Rd 22 Comment
  CHSC105198  Cordylanthus pilosus subsp. pilosus B. Castro; L. P. Janeway 1999-7-5 1012 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, along small rd to Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1057 Comment
  JEPS80717  Cordylanthus pilosus subsp. pilosus L. R. Heckard and J. C. Hickman 1981-7-28 5677 Colusa 3.7 km e Ladoga Bridge (w of Maxwell, along roadside) Comment
  JEPS68402  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3146 Colusa above Happy Camp (e end of Snow Mt.) 731 Comment
  UCD123108  Cordylanthus pilosus subsp. pilosus Frederica Bowcutt 1985-6-19 600 Colusa Just SW of Bear Valley. On ridge NW of Wilbur Hot Springs about 2 air miles. Comment
  RSA500440  Cordylanthus pringlei Vernon H. Oswald 1989-4-12 4008 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. 412 Comment
  RSA505428  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123114  Cordylanthus pringlei A. M. Shapiro 1994-8-16 s.n. Colusa Letts Valley Road, Canyon of Stony Creek. 1432 Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  UCD63123  Cordylanthus tenuis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4953 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  CAS-BOT-BC209738  Cornus glabrata Roxana Stinchfield 1916-7-9 413 Colusa Oak grove along Sacramento Riv., Phillips Ranch Comment
  UCD13381  Cornus glabrata Charles Martin 1986-5-17 30 Colusa Along roadside, 2.8 miles west of Stonyford. Along Foot Springs Rd. Comment
  CHSC75703  Cornus sericea subsp. occidentalis Vernon H. Oswald; Lowell Ahart 1999-6-22 9777 Colusa Lily Pond near Upper Letts Lake west of Stonyford. 1243 Comment
  JEPS75756  Cornus sericea subsp. sericea L. R. Heckard and R. Bacigalupi 1976-9-6 4438 Colusa at margin of Trout Creek at trail crossing Snow Mt. 1828 Comment
  JEPS80825  Cornus sericea subsp. sericea L. R. Heckard and J. Hickman 1981-7-31 5797 Colusa e. side Snow Mt. (Dark Hollow Creek) 1584 Comment
  CHSC83313  Cotula coronopifolia Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  CHSC98784  Cotula coronopifolia Richard R. Halse 2007-3-23 7109 Colusa Williams: by junction of 5th Street and B Street. 25 Comment
  JEPS118675  Cotula coronopifolia B. Castro, L. P. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UCD64262  Crassula connata Craig D. Thomsen 2000-3-31 2059 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
  UCD38810  Crepis acuminata Beecher Crampton 1958-5-19 4803 Colusa 5.5 miles south of Ladoga. Comment
  CHSC29713  Cressa truxillensis K. R. Stern 1980-6-30 6649 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  UC572539  Cressa truxillensis H. S. Yates 1936-8-14 6133 Colusa 3 mi. s. Colusa; Colusa Quad. 15 Comment
  UCD84428  Crocanthemum scoparium Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6043 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CAS-BOT-BC190085  Crypsis schoenoides Milo S. Baker 1946-9-4 11621 Colusa Butte Sink near locked Gate of Colusa Gun Club. Comment
  CHSC113051  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 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
  CHSC80307  Crypsis schoenoides B. Castro; G. Kuenster 2000-7-19 1205 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal. 48 Comment
  JEPS110434  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS120801  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 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
  RSA268077  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1972-6-6 5658 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
Read comments
Aug 18 2014
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  SEINET3926255  Crypsis schoenoides Barbara Ertter, Elizabeth Neese; Laura Fujii; Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga.; 0 366 Comment
  UCD145274  Crypsis schoenoides Barry Hammel 1976-8-5 427 Colusa east side of Highway 45 near Colusa Golf Club. 30 Comment
  CAS-BOT-BC190166  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 miles south of Colusa. 15 Comment
  RSA126601  Crypsis vaginiflora H. S. Yates 1936-8-14 6136 Colusa 6 miles S. of Grimes 15 Comment
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UC1100190  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UCD66926  Crypsis vaginiflora Craig D. Thomsen; G. Harrington 2008-7-6 2785 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  RSA756835  Cryptantha affinis Barbara Ertter 1989-7-1 8615 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  SEINET4206983  Cryptantha clevelandii var. dissita D. W. McNeal 1982-5-2 2632 Colusa On a rd. bank above Hwy. #20 at the Lake-Colus Co. line.; 0 Comment
  OBI20715  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  CHSC79095  Cryptantha flaccida B. Castro; C. Warren 2000-4-3 1048 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 179 Comment
  HSC45688  Cryptantha flaccida Patricia Shesgreen 1978-4-22 31 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS81272  Cryptantha flaccida L. R. Heckard and J. C. Hickman 1982-7-5 5882 Colusa s of (slope below area) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UC78716  Cryptantha flaccida T. S. Brandegee Apr 1889 Colusa Leesville Comment
  UCD58117  Cryptantha flaccida Ellen Dean; PLB 102 Class 2007-4-29 3712 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  UC857088  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa county on road to Williams Comment
  UCD82520  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2877 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCD82527  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2883 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UC1051711  Cryptantha intermedia Helen K. Sharsmith 1953-6-19 4278 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC726038  Cryptantha intermedia A. A. Heller 1940-5-6 15581 Colusa near Lake County line on State Highway 20 (near a bench mark) 232 Comment
  UC971695  Cryptantha intermedia Leo Koch 1940-4-29 936 b Colusa near Lake and Colusa County (along Highway 20; Williams Highway) 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
  HSC48168  Cryptantha intermedia var. hendersonii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3932 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 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
  CAS-BOT-BC234978  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 981 Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  UC1177889  Cryptantha torreyana Peter M. Ray 1950-4-16 1733 Colusa canyon of North Fork Big Stony Creek ca 1 mi below crossing of the stream North Fork Big Stony Creek Comment
  UCD66964  Cryptantha torreyana Ellen Dean; Davis Botanical Society 2008-5-31 5008 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  SEINET8731274 Image available Cryptantha torreyana Helen K. Sharsmith 1953-1 4282 Colusa Near Trough Springs on Trough Springs Ridge; clearing in Sugar Pine-Douglas Fir forest, Mendocino National Forest. 975 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
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CAS-BOT-BC80807  Cupressus sargentii Hugh Leech 1971-10-9 s.n. Colusa [Cook's] Cooks Springs Comment
  UCD125755  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UC1116696  Cuscuta californica Beecher Crampton 1961-7-20 5935 Colusa 4 mi se Grimes (along Knight's Landing Road) Comment
  UCD67008  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2749 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. 470 Comment
  UC1191660  Cuscuta indecora Herbert L. Mason and Verne Grant 1946-8-6 12974 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  UCD37228  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa Colusa County, 5.5 miles south of College City, just northeast of Hershey Railroad siding, Grieve Road (Country Road 88). Comment
  CAS-BOT-BC433233  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  HSC62811  Cynoglossum grande Rick Lundquist 1979-4-14 19 Colusa Buck Flat, on Walker Ridge Rd. 884 Comment
  CAS-BOT-BC114781  Cyperus acuminatus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 465 Colusa Davis tule, near Sycamore Slough. Comment
  POM185713  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule, near Sycamore Slough. Comment
  JEPS110388  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
  UCD141006  Cyperus difformis V. C. Bryant 1931-6-24 2205 Colusa Colusa. Comment
  SEINET8756311 Image available Cyperus difformis June McCaskill 1954-8-9 362 Colusa ca. 2 miles east of Princeton and 400 yards south of Glenn County line Comment
  UC1100534  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-7 12982 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink 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
  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
  UC1100516  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-8-7 12984 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink 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
  CAS-BOT-BC113935  Cyperus odoratus Gordon H. True 1974-11-15 7839 Colusa On Delevan Road just W of Four Mile Road, 4 mi E of Delevan. 27 Comment
  CDA38904  Cyperus odoratus G. H. True 1974-11-15 7839 Colusa On Delevan Road just west of Four Mile Road, 4 miles east of Delevan. Comment
  CHSC112619  Cypselea humifusa Lowell Ahart 2013-10-1 19073 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCD18854  Damasonium californicum Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 162 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CAS-BOT-BC445507  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  RSA91938  Damasonium californicum Beecher Crampton 1953-4-29 1148 Colusa 7 miles E of Maxwell. Comment
  CHSC106228  Danthonia californica var. californica B. Castro; L. P. Janeway 2001-6-3 1253 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  SBBG119887  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  UCD57616  Datisca glomerata Jill Poloske; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. In bed of Thompson Creek. 304 Comment
  UC26117  Datura stramonium J. Burtt Davy May, 1898 4301 Colusa near Princeton; near Princeton Comment
  RSA724817  Datura wrightii L. Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1.5 miles (air) east of East Park Reservoir, about 4.5 miles (air) northeast of Lodoga. 546 Comment
  CHSC112274  Daucus pusillus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC112314  Daucus pusillus Lowell Ahart 2013-5-1 18675 Colusa Inner North Coast Range. On the north side of the wash, north of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD57059  Daucus pusillus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3653 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  HSC89669  Delphinium decorum subsp. tracyi A. Smith, A. Eller, B. Hoffman 1989-4-15 21 Colusa Goat Mtn. Rd. 0.4 mi. SW of Lodoga/Stonyford intersection 152 Comment
  UCD38812  Delphinium hesperium Beecher Crampton 1958-5-19 4798 Colusa 5.8 miles south of Lodoga. Comment
  HSC47510  Delphinium hesperium Sheila Logan 1978-4-21 52 Colusa N of Bear Valley Rd. Comment
  UCD18513  Delphinium hesperium Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley. Comment
  CAS-BOT-BC238187  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC86969  Delphinium hesperium subsp. pallescens B. Castro 2003-5-14 1434 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. 158 Comment
  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
  UCD64411  Delphinium hesperium subsp. pallescens Craig D. Thomsen 2000-4-12 2138 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
  HSC45441  Delphinium hesperium subsp. pallescens M. Alcasas 1978-4-23 58 Colusa Bartlett Springs Rd., 0.5 mi. from junction with Bear Valley Rd 457 Comment
  SBBG2159  Delphinium hesperium subsp. pallescens H. and M. Dearing 1933-5-24 399 Colusa 20 mi W of Williams Comment
  HSC25000  Delphinium nudicaule M. Dole 1963-4-15 60 Colusa 7 mi. S of junction of Hwy. 16 and Hwy 20 on Hwy. 16 Comment
  UCD63107  Delphinium patens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4938 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 344 Comment
  UCD82510  Delphinium uliginosum Craig Thomsen; G. Harrington 2008-5-12 2868 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  SEINET12091405  Delphinium uliginosum R. A. DeMartile 1983-1 109 Colusa Bartlett Springs Road N of Baldy Mt 762 Comment
  CHSC46049  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  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
  UCD163691  Delphinium variegatum Craig Thomsen 1999-4-27 1993 Colusa Bear Valley. About 6 miles north of Hwy 20, west of Bear Valley Rd. Comment
  SEINET12086720  Delphinium variegatum L. S. Rose 1936-1 s.n. Colusa 10 mi NW of Rumsey 213 Comment
  SEINET5718465 Image available Delphinium variegatum Robert A. Christison 1960-1 29 Colusa On State Hwy 16, ca. 3 miles from Yolo-Colusa county border. 183 Comment
  UCD14294  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa Colusa Co.; 9.8 miles north of Highway 20 on Bear Valley Road, 1/2 mile into field on the east side of the road; Comment
  CAS-BOT-BC16957  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1917-4-12 517 Colusa 4 miles east of Williams Comment
  CDA11414  Delphinium variegatum subsp. variegatum G. F. Hrusa, K. van Katwyk 1995-4-22 12135 Colusa Inner North Coast Ranges; Large colony on hillslope at E base of ridge immed. E of Bear Valley, along Leesville Road. Flowers dark purple. Common, perennial, root not detaching. Comment
  CHSC1465  Delphinium variegatum subsp. variegatum 1946-4-18 Colusa Cache Creek. Comment
  UC583162  Delphinium variegatum subsp. variegatum Lewis S. Rose 1936-4-27 36177 Colusa hills 10 mi nw Rumsey 213 Comment
  SBBG115397  Delphinium variegatum subsp. variegatum E. Witharm 1998-4-17 11 Colusa Bear Valley, Leesville-Lodoga Rd, 2 rd mi NE from Bear Valley Rd-Leesville-Lodoga Rd jct Comment
  SEINET3927152  Deschampsia cespitosa Fred W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys, western.; 0 Comment
  JEPS80431  Deschampsia cespitosa subsp. cespitosa L. R. Heckard 1974-9-9 3867 Colusa just n.e. of rocky promontory s.e. of Foutch Camp (Snow Mt.); Snow Mt. 1920 Comment
  CAS-BOT-BC192671  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  HSC9599  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa 3 mi. S of Arbuckle Rd. on the Pacific Hwy. Comment
  JEPS75435  Deschampsia danthonioides W. L. Jepson 1934-5-3 16601 Colusa Stegeman sta. n. of Colusa Comment
  RSA10441  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa Sacramento Valley. 3 mi. south of Arbuckle Comment
  UCD62774  Deschampsia danthonioides var. gracilis A. A. Beetle 1942-5-21 3275 Colusa 12 miles north of Williams. Comment
  JEPS75036  Deschampsia elongata L. R. Heckard 1972-7-10 3109 Colusa Trout Creek crossing of trail to Box Spring (Snow Mt.); Snow Mt. 1828 Comment
  UC1950419  Deschampsia elongata Barbara Ertter 1989-7-1 8609 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; NE-facing slope Comment
  CAS-BOT-BC402210  Dicentra chrysantha A. A. Heller 1940-6-5 15713 a Colusa Near the foot of the grade east of Lodogo, on the Lodogo-Sites road 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
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  JEPS80086  Dicentra uniflora L. R. Heckard with J. Hickman 1979-6-16 5093 Colusa about 0.5 mi s Milk Ranch (nw of Snow Mt. West Peak) 2011 Comment
  UC71643  Dichelostemma capitatum Miss Alice King 1905-1 Colusa College City Comment
  CHSC58244  Dichelostemma capitatum subsp. capitatum Dave Read 1975-4-20 13 Colusa Bear Valley, 8.7 miles north of State Highway 20 on Bear Valley Road. 411 Comment
  CHSC81331  Dichelostemma capitatum subsp. capitatum J. Trizzino 2001-3-31 17 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  UCR206370  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14366 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UC1334721  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa between Williams and Clear Lake (Hwy 20) 152 Comment
  CHSC93753  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road ca. 3 miles SE of Leesville. 480 Comment
  JEPS80804  Dieteria canescens var. shastensis L. R. Heckard and J. C. Hickman 1981-7-30 5774 Colusa about 1.7 km air miles from West Peak (e summit of ridge running e of West Peak); Snow Mt. 2042 Comment
  UC1100289  Digitaria ischaemum Herbert L. Mason 1945-9-19 12722 a Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink spillway Comment
  UC1100288  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway Comment
  CHSC86525  Diplacus douglasii B. Castro 2003-3-18 1389 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  CHSC94637  Diplacus layneae Lowell Ahart 2006-6-11 12664 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  CHSC60689  Diplacus tricolor Vernon H. Oswald 1993-4-14 5263 Colusa N. side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CAS-BOT-BC208649  Distichlis spicata Roxana S. Ferris 1926-4-22 6291 Colusa 3 miles west of Colusa Comment
  JEPS104128  Distichlis spicata Lowell Ahart 2003-8-15 10508 Colusa Rd (disked) that bordered a rice field, on the south side of Highway 20, ca 1 mi sw of Williams. 27 Comment
  UCD18846  Distichlis spicata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 154 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
  UCD64170  Distichlis spicata Beecher Crampton 1958-6-27 4979 Colusa 2.5 miles south of Grimes. Comment
  CHSC96039  Dittrichia graveolens Robert E. Preston 2006-10-27 2411 Colusa Colusa County. 2.3 miles N of Maxwell, at on-ramp from Hwy 99 to I-5. 25 Comment
  CHSC116063  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  RSA10950  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford. 305 Comment
  UCD97119  Dodecatheon hendersonii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6902 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  HSC83326  Dodecatheon hendersonii Harold Grams 1975-4-12 10 Colusa Hwy. 16, 12.4 mi. N of Rumsey Comment
  CHSC29749  Downingia bella K. R. Stern 1980-6-1 6638 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC48008  Downingia elegans Vernon Oswald 1984-7-20 1616 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. 1280 Comment
  CHSC60673  Downingia insignis Vernon H. Oswald 1993-4-14 5264 Colusa N side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CHSC60732  Downingia insignis Vernon H. Oswald; Lowell Ahart 1993-5-27 5428 Colusa Sites-Logoda Rd. ca. 0.5 mi NW of Sites in the rolling, grass covered hills bordering the W side of the Sacramento Valley. 121 Comment
  JEPS18023  Downingia insignis George B. Rossbach 1955-4-9 512 Colusa 3 mi e Maxwell; Sacramento Valley 18 Comment
  UC131880  Downingia insignis A. A. Heller 1902-5-19 Colusa Colusa Comment
  UC76662  Downingia insignis Miss M. Alice King 1905-1-1 Colusa near College City; Sacramento Valley Comment
  UCD35944  Downingia insignis Beecher Crampton 1953-4-29 1145 Colusa 3 miles east of Maxwell. Comment
  UC2048629  Downingia pulchella Lisa Schultheis with Ewald Weber 1995-6-3 203 -95 Colusa Bear Valley. Comment
  UC70438  Drosera rotundifolia Milo S. Baker 1898-8-22 555 Colusa Bear Valley Mts.; along stream Comment
  HSC44468  Dudleya cymosa R. York 1978-4-22 135 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC112622  Dysphania pumilio Lowell Ahart 2013-10-1 19086 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
  UCD34847  Echinochloa crus-galli Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CDA1985  Echinochloa muricata E. A. Biondi 1972-1 Colusa Colusa. 0 Comment
  CDA186  Echinochloa oryzicola P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 Comment
  UCD61107  Echinochloa oryzicola P. B. Kennedy 1925-9-18 Colusa Cortena. Comment
  UCD61165  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena, site of UC temporary experimental rice station 1923 - 1928. Comment
  UCD61167  Echinochloa oryzicola P. B. Kennedy 1925-9-18 Colusa Rice Station, Cortena. Comment
  CHSC84967  Echinodorus berteroi Lowell Ahart 2003-10-23 10671 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
  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
  POM312496  Eclipta alba H. L. Mason 1945-9-19 12725 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UC1613357  Eleocharis bolanderi Charles M. Belshaw Apr 1937 2888 Colusa vicinity of Cooks Spring, Devils Ridge Inner North Coast Range Comment
  UC1100591  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa rice fields 3 mi W of Williams Comment
  UCD49592  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-7-18 1006 Colusa West of Williams, 2.5 miles, Colusa County. Comment
  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
  UCD49740  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Colusa County, California. Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 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
  POM313051  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles Comment
  CHSC84216  Eleocharis parishii Lowell Ahart 2003-7-14 10382 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
  JEPS104048  Eleocharis parishii Lowell Ahart 2003-7-14 10382 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
  UCD61458  Eleocharis parishii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3904 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
  UCD63131  Eleocharis parishii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4961 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
  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
  CAS-BOT-BC228537  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville Comment
  POM146492  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa [No locality specified] Comment
  HSC48169  Emmenanthe penduliflora Thomas W. Nelson, Jane P. Nelson 1978-4-29 3933 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  CHSC90779  Emmenanthe penduliflora var. penduliflora D. Isle 2002-4-18 183 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, N. of Fouts Springs. 548 Comment
  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
  UCD82133  Epilobium brachycarpum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5663 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UCR205141  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14246 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 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
  UCD81376  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
  CHSC94526  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC113048  Epilobium densiflorum Lowell Ahart 2013-10-1 19102 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
  UCD164145  Epilobium densiflorum Craig Thomsen 1997-6-21 1932 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  CHSC115385  Epilobium minutum Lowell Ahart 2015-4-1 19998 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  JEPS124235  Epilobium minutum Lowell Ahart 2015-4-1 19998 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
  JEPS73520  Epilobium minutum L. R. Heckard 1972-7-10 3138 Colusa between Foutch Camp and Trout Creek crossing; Snow Mt. 1828 Comment
  CHSC32221  Epilobium nivium James Jokerst 1980-8-6 1049 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
Read comments
Dec 23 2008
  JEPS74981  Epilobium nivium L. R. Heckard 1974-9-11 3953 Colusa along Summit Springs trail Snow Mt. 1737 Comment
  CHSC94473  Epilobium torreyi Lowell Ahart 2006-8-9 13117 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80190  Epilobium torreyi L. R. Heckard and J. Hickman 1980-7-3 5341 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); southwest Snow Mt. 1548 Comment
  CHSC112010  Epipactis gigantea David Isle 1977-4-23 2079 Colusa Mendocino National Forest. Goat Mtn. Rd. ~1.5 miles W of jct. w/ Lodoga-Stonyford Rd (Co. Rd. 306). On N edge Little Stony Creek. 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
  HSC97370  Eragrostis cilianensis J. P. Smith, J. O. Sawyer 2007-9-2 12418 Colusa River Rd. N of Colusa 20 Comment
  UCR281728  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 49 Comment
  RSA0119053  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~100 yds E of normal lake edge in muddy clay soil. 354 Comment
  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
  JEPS80252  Eremocarpus setiger L. R. Heckard and J. Hickman 1980-9-15 5431 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  CAS-BOT-BC479710  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.1 mi N of Lodoga, near shore of reservoir 370 Comment
  UCR261664  Eriastrum abramsii Ann Howald 2003-5-8 2333 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 380 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
  CAS-BOT-BC515192  Eriastrum tracyi Volney Rattan 1881-6-1 s.n. Colusa Stony Creek. Coast Mountains north of San Francisco Bay 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
  JEPS73515  Erigeron petrophilus var. petrophilus L. R. Heckard 1972-7-10 3133 Colusa overlooking and 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  JEPS75738  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-10 3899 Colusa e slope East Peak; Snow Mt., East Peak 2103 Comment
  JEPS80214  Erigeron philadelphicus var. philadelphicus L. R. Heckard and J. Hickman 1980-7-3 5368 Colusa sw slope Snow Mt.; , Summit Springs 1554 Comment
  CAS-BOT-BC216050  Eriodictyon californicum Roxana Stinchfield 1916-6-17 278 Colusa Cemetery, College City Comment
  HSC65994  Eriodictyon californicum Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-1 49 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville 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
  RSA0056304  Eriodictyon californicum James R. Shevock 1971-4-8 938 Colusa Sites Lodge Rd., near Grapevine Pass. 426 Comment
  CAS-BOT-BC242576  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa Bear Creek Canyon n. of Highway 20 (near Wilbur Springs) Comment
  CDA15553  Eriogonum dasyanthemum G. F. Hrusa 1998-10-28 14904 Colusa North Coast Ranges; Summit of Walker Ridge. Comment
  CHSC92835  Eriogonum dasyanthemum D. Isle 2000-6-7 1245 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  SEINET8043934 Image available Eriogonum dasyanthemum Ann Howald 2003-1 2353 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground. 378 Comment
  UCD61450  Eriogonum dasyanthemum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3894 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  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
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  CDA22487  Eriogonum dasyanthemum D. Brown 1973-10-19 Colusa Sand Creek, ca. 6 miles west of Arbuckle. 0 Comment
  CDA22488  Eriogonum dasyanthemum T. C. Fuller 1958-5-27 Colusa Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  JEPS57028  Eriogonum dasyanthemum W. L. Jepson 1934-7-28 16749 Colusa hills se of Cortina Valley Comment
  UC1299724  Eriogonum dasyanthemum Freed W. Hoffman 1947-6-19 1654 Colusa near Wilbur Springs Comment
  UC1051504  Eriogonum hirtiflorum Helen K. Sharsmith 1953-6-19 4288 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest, Trough 975 Comment
  JEPS73500  Eriogonum luteolum var. luteolum L. R. Heckard 1972-7-10 3118 Colusa trail to Box Springs near Trout Creek crossing; Snow Mt., Trout Creek 1828 Comment
  UC1043546  Eriogonum luteolum var. luteolum P. C. Everett and E. K. Balls 1954-10-17 20336 Colusa 0.9 mi sw on road from Stonyford to Upper Lake Linger Longer campsite (w slope Goat Mt.); Goat Mt. 1828 Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  CAS-BOT-BC268616  Eriogonum spergulinum var. reddingianum Peter H. Raven; R. Snow 1959-9-11 14419 Colusa Dark Hollow Creek 1859 Comment
  RSA133246  Eriogonum spergulinum var. reddingianum Peter H. Raven, Richard Snow 1959-9-11 14419 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  CHSC33915  Eriogonum strictum var. greenei James Jokerst 1980-8-6 1048 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
  JEPS80805  Eriogonum strictum var. greenei L. R. Heckard and J. C. Hickman 1981-7-30 5776 Colusa about 2.5 km on ridge running e from West Peak; Snow Mt. 2011 Comment
  UC1299713  Eriogonum tripodum Freed W. Hoffman 1947-6-19 1618 Colusa between Ladoga and Cook Springs Comment
  JEPS80278  Eriogonum umbellatum var. bahiiforme L. R. Heckard, and J. Hickman 1980-9-16 5464 Colusa n slope of West Peak, Snow Mt. Snow Mt., West Peak 2042 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
  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
  SEINET7096744  Eriophyllum lanatum A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UCD57823  Eriophyllum lanatum Gordon Harrington 2007-4-17 34 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  CAS-BOT-BC308098  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CHSC94882  Eriophyllum lanatum var. achilleoides Lowell Ahart 2006-6-11 12674 Colusa On the east side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UC195369  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa on grade about 3 mi w Leesville; Coast Range Comment
  UC896387  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa 3 mi w of Leesville (on open gravelly slopes); Coast Range Comment
  UCD67054  Eriophyllum lanatum var. achilleoides Craig D. Thomsen 2008-5-31 2760 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. Along Hwy 16, ca. 1 mile south of Hwy 20. Near Cowboy Camp. 0.25 mile west of Bear Creek and public viewing area. 305 Comment
  CAS-BOT-BC308096  Eriophyllum lanatum var. achilleoides Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley along road to Bartlett Springs Comment
  RSA302654  Eriophyllum lanatum var. achilleoides Jim Shevock 1971-4-8 939 Colusa Sites-Lodoga Road 427 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
  SEINET11850784  Eriophyllum staechadifolium C. L. Abbott 1926-1 s.n. Colusa Colusa 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
  POM278144  Erodium botrys Lyman Benson 1933-4-16 4333 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. 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
  CHSC91560  Eryngium aristulatum D. Isle 1995-7-12 397 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. BLM land S off Cook Springs. 548 Comment
  UCD82579  Eryngium aristulatum Craig Thomsen 2008-6-12 2769 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  UC21016  Eryngium aristulatum var. aristulatum J. Burtt Davy 1898-5-1 4300 Colusa near Willows Comment
Read comments
Sep 15 2014
  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
  UCD61476  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
  UC727670  Eryngium castrense Milo S. Baker 1946-9-4 11611 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CAS-BOT-BC40751  Erysimum capitatum Roxana S. Ferris 1917-4-14 576 Colusa Arbuckle-Rumsey Road. Foothills 7 miles west of Arbuckle. Comment
  UCD163847  Erysimum capitatum Craig D. Thomsen 2000-5-30 2273 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  UCD68111  Erysimum capitatum Kathleen A. Robson 1981-5-23 33 Colusa From Stonyford, take Fouts Springs Road 12 miles West, past Fouts Springs to Letts Lake, Mendocino National Forest. Growing on a steep roadcut bank at entrance to lake, on loose dry soil, in full sunlight, individual plants not very abundant in area. Flowers, bright orange. 1219 Comment
  HSC6769  Erysimum capitatum var. capitatum M. Dole 1963-4-15 67 Colusa 6 mi. S of the junction of Hwys. 16 and 20 on Hwy. 16 Comment
  JEPS86638  Erysimum capitatum var. capitatum L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6684 Colusa along trail from Frog Pond to East Peak; Snow Mtn. 1875 Comment
  POM143091  Erysimum capitatum var. capitatum Roxana S. Ferris 1917-4-14 576 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC112229  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  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
  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
  CHSC100950  Eschscholzia caespitosa Rodney Lacey 2008-4-1 Colusa Inner North Coast Ranges. Little Stony Creek; on private dirt road adjacent to Goat Mountain Road, near Lodoga-Stonyford Road, approximately 3.2 km west of Lodoga. 398 Comment
  UCR198142  Eschscholzia caespitosa Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3671 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  JEPS80217  Eschscholzia californica L. R. Heckard and J. Hickman 1980-7-3 5373 Colusa above Summit Springs (sw slope of mt.); Snow Mt. 1554 Comment
  CAS-BOT-BC402977  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC5884  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  SD8240  Eschscholzia californica Brandegee Apr 1889 Colusa Comment
  RSA590194  Eschscholzia californica subsp. californica Michael A. Vincent, Robert Rhode 1996-3-30 7295 Colusa Along Bear Valley Road, 7.1 miles north of junction with Wilbur Springs Road. Comment
  SEINET2442355  Eucalyptus camaldulensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14319 Colusa Sacramento Valley: Jameson Road 1.3 miles north of its junction with Lurline ROad and south of Harbison Road, generally west of the city of Colusa. 16 Comment
  CHSC70978  Euphorbia crenulata Vernon Oswald; Lowell Ahart 1998-5-7 8994 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. Roadside bank. 487 Comment
  UCD55467  Euphorbia serpillifolia Ellen Dean; Gordon Harrington 2006-10-6 3292 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UCD66937  Euphorbia serpillifolia Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5086 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
  CHSC112255  Euphorbia spathulata Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18645 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  CHSC70979  Euphorbia spathulata Vernon Oswald; Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  UCD169734  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. 558 Comment
  UCD56931  Euphorbia spathulata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3534 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 353 Comment
  UCD82503  Euphorbia spathulata Craig Thomsen; G. Harrington 2009-5-12 2863 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82371  Euphorbia spathulata Robin McMaster 1973-4-15 344 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  UCD57295  Extriplex joaquinana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3666 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD58122  Extriplex joaquinana Ellen Dean; PLB 102 Class 2007-4-29 3718 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Near origin of Craig Canyon. 359 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
  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
  JEPS120963  Festuca microstachys var. microstachys Lowell Ahart 2013-5-1 18696 Colusa Near a small drainage, N of the wash and N side of Hwy 20, just E of the Lake County Line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC112210  Festuca microstachys var. pauciflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120970  Festuca microstachys var. pauciflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18636 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
  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-BC77677  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCD84436  Ficus carica Jack Alderson 2009-4-8 30 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CAS-BOT-BC63016  Frangula californica subsp. crassifolia C. B. Wolf; B. D. Stark 1933-9-25 5506 Colusa Inner n. coast range, w. side of Bear Valley, near Mitchell Ranch House. Type Locality. 304 Comment
  UCD112807  Frangula californica subsp. crassifolia Beecher Crampton 1958-5-19 4818 Colusa along Little Stony Creek, 4 - 5 miles west of Lodoga. Comment
  UCD58175  Frangula californica subsp. tomentella Gordon Harrington 2007-5-31 67 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  CAS-BOT-BC223843  Frankenia palmeri Roxana Stinchfield 1916-7-11 450 Colusa Colusa - Williams Road the trough Comment
  CHSC50803  Frankenia salina Vernon Oswald 1990-7-3 4411 Colusa Four Mile Rd ca. 4.5 mi n of Maxwell-Colusa Rd, ca. 6 mi (air) northeast of Maxwell. Along the edge of the road. 27 Comment
  CHSC59735  Frankenia salina K. R. Stern 1980-6-30 6652 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC223367  Fraxinus dipetala Lester Rowntree 1936-4-11 s.n. Colusa Edge of Bear Creek Comment
  CHSC36175  Fraxinus dipetala Robert A. Schlising 1978-4-10 3218 Colusa Grapevine Pass, on Sites--Lodoga Road. 562 Comment
  SBBG115358  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 Colusa Bear Valley, Bear Valley Rd, Bear Valley Crk 450 Comment
  UCD57451  Fraxinus dipetala Gina Darin; with Plant Biology 102 2007-4-29 6 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. 377 Comment
  CAS-BOT-BC223489  Fraxinus latifolia Roxana Stinchfield 1916-7-8 391 Colusa Sycamore Slough Comment
  UC1613366  Fritillaria Charles M. Belshaw April 1937 2863 Colusa vicinity of Cook's Spring (Devil's Ridge); Devil's Ridge Comment
  JEPS15265  Fritillaria affinis Rimo Bacigalupi 1950-4-16 3102 Colusa above and n of Red Bridge Camp (between and above the confluence of the North and Middle Forks of Stony Creek, very close to Glenn County Line, easternmostr ridges of the Inner); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  JEPS95500  Fritillaria affinis Vernon H. Oswald and L. Ahart 1994-3-23 6013 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford 518 Comment
  UCD81705  Fritillaria affinis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5713 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
  CAS-BOT-BC130431  Fritillaria pluriflora Barbara Menzies; Arthur Menzies 1967-3-18 s.n. Colusa 10 mi. north of Highway 20 (Bear Valley), 5 mi. north of Wilbur Springs cut-off Comment
  JEPS55682  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  RSA297923  Fritillaria pluriflora W. Roderick 1968-3-10 s.n. Colusa On Hwy 20 (Williams-Clear Lake), 0.5 mile from Lake Co. Line Comment
  SJSU8654  Fritillaria pluriflora E. O. Haas 1956-3-21 Colusa Salt Cr area 10 mi SW of Arbuckle 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
  SEINET8478939  Fritillaria pluriflora W. Roderick 1967-3-20 s.n. Colusa Bear Valley. Comment
  CDA15495  Fritillaria recurva G. F. Hrusa, WTD 1998-6-19 14632 Colusa North Coast Ranges; N side of Goat Mtn. summit area. Comment
  CDA14917  Galium andrewsii G. F. Hrusa 1993-5-2 10862 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Above Frenzel Creek, tributary of Little Stony Creek. Comment
  HSC48146  Galium andrewsii Thomas W. Nelson, Jane P. Nelson 1978-4-30 3967 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  UCD66703  Galium andrewsii Craig D. Thomsen 2001-4-12 2451 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
  CHSC43737  Galium andrewsii subsp. andrewsii Vernon Oswald 1986-5-12 2012 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi W of Bear Valley Rd. 487 Comment
  JEPS52784  Galium andrewsii subsp. andrewsii Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4356 Colusa Bartlett Springs road 2.5 mi w Leesville (1.8 mi w of junction with Bear Valley Rd, w-facing slope) 530 Comment
  JEPS80799  Galium andrewsii subsp. andrewsii L. R. Heckard and J. C. Hickman 1981-7-30 5769 Colusa about 100 ft above on n side Trout Creek (se side of mt); Snow Mt. 1554 Comment
  JEPS52809  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4355 Colusa Hwy 20 along creek 1 mi w junction with Highway 16; Bear Creek 329 Comment
  UCD164159  Galium aparine Craig Thomsen 2000-4-28 2266 b Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD66441  Galium aparine Craig D. Thomsen 2000-4-28 2189 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
  CDA14919  Galium bolanderi G. F. Hrusa 1993-5-2 10860 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Mid-canyon of Frenzel Creek. Comment
  JEPS75835  Galium bolanderi L. R. Heckard 1974-9-11 3952 Colusa along Summit Springs trail Snow Mt. 1798 Comment
  HSC19810  Galium californicum subsp. californicum Lauramay T. Dempster, G. L. Stebbins 1967-10-13 4366 Colusa NW ridge of Goat Mtn., 1.6 mi. SE of Fir Root Camp Comment
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS81405  Galium grayanum L. R. Heckard and J. C. Hickman 1982-7-9 6012 Colusa just e lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  CHSC91041  Galium grayanum var. nanum D. Isle 2003-6-12 375 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. On Colusa/Lake County line, 1/8 mi. SE of Goat Mt. Lookout. 1841 Comment
  CHSC79906  Galium parisiense B. Castro; L. P. Janeway 2000-5-4 1130 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  JEPS80877  Galium parisiense L. R. Heckard and J. C. Hickman 1980-7-3 5364 A Colusa slopes about Summit Springs (sw slope of mt); Snow Mt. 1554 Comment
  UC1229764  Galium parisiense Francia Chisaki and Helen K. Sharsmith 1959-5-27 1334 Colusa on road leading out of Red Bridge Camp Mill Creek Crossing Comment
  UCD66950  Galium parisiense Ellen Dean; Davis Botanical Society 2008-5-31 4995 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD82478  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2856 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD57343  Galium porrigens Sergio Testa 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
  UCD66527  Galium porrigens Craig D. Thomsen 2000-4-28 2228 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. Comment
  UCD66572  Galium porrigens var. tenue Craig D. Thomsen 2001-5-24 2457 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
  CDA34117  Galium trifidum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CDA12373  Garrya congdonii G. F. Hrusa 1996-1-2 12626 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  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
  CHSC94472  Gastridium phleoides Lowell Ahart 2006-8-9 13171 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80145  Gayophytum diffusum subsp. parviflorum L. R. Heckard with J. Hickman 1980-7-2 5306 Colusa trail from Summit Springs to Snow Mt. peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. line) 1722 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
  CHSC101434  Geranium dissectum David Isle 2007-5-1 1575 Colusa SE of Maxwell approx. 4 miles in riparian natural area just W of irrigation canal adjacent to 'Lakeland' rice fields farmed by William Dirks and Jack Barrett. W of footbridge S of third landing. 30 Comment
  UCD57560  Geranium dissectum Stephanie Castle; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek. 304 Comment
  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
  UCD63100  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4931 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  UCD66536  Gilia capitata Craig D. Thomsen 2001-5-24 2488 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
  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
  RSA537483  Gilia capitata Barbara Ertter 1989-7-1 8601 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek, ca 12 airmiles WSW of Stonyford 1500 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
  CDA15474  Gilia capitata subsp. mediomontana G. F. Hrusa, WTD 1998-6-19 14611 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC87237  Gilia clivorum B. Castro; Beth Hendrickson 2003-3-24 1399 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 310 Comment
  UC73637  Gilia clivorum Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  HSC45725  Gilia tricolor Patricia Shesgreen 1978-4-22 49 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72150  Gilia tricolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9563 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD58115  Gilia tricolor Ellen Dean; PLB 102 Class 2007-4-29 3710 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  HSC72769  Gilia tricolor J. Krajanowski 1981-4-4 4 Colusa .3 mi. W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 18 mi. SW of Williams 322 Comment
  RSA0118785  Gilia tricolor subsp. diffusa Lowell A. Ahart 2013-5-1 18684 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
  UC71621  Githopsis specularioides Miss Alice King 1905-1 Colusa College City Comment
  UC1563931  Glinus lotoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 Comment
  CAS-BOT-BC434996  Glinus lotoides Roxana Stinchfield 1916-7-9 425 Colusa Along Sacramento River, Phillips Ranch near Sycamore. Comment
  JEPS127599  Glinus lotoides David Isle with Rhonda Isle 2014-9-27 2440 Colusa W side of East Park Reservoir, ca 0.3 miles S of boat launch, ca 100 yards E of normal lake edge. 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
  UCD67068  Glyceria Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5096 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
  CHSC92602  Glyceria striata D. Isle 2005-7-14 1143 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In first perennial drainage west of junction 17N09 diagonal 17N10 about 40 yards above culvert crossing 17N09. Waypoint BDCMP 1: NAD27 10S 0523113E 4350662N. Comment
  CHSC77335  Glycyrrhiza lepidota Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  RSA725016  Gnaphalium luteoalbum L. Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCR227904  Gnaphalium palustre Ellen Dean 2008-6-8 5064 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  UCD55451  Grindelia camporum Ellen Dean; Gordon Harrington 2006-10-6 3276 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
  CDA6134  Grindelia camporum var. camporum M. S. Bergseng 1959-5-8 2343 Colusa Arbuckle. 0 Comment
  CHSC50794  Grindelia camporum var. camporum Vernon Oswald 1990-7-30 4410 Colusa Maxwell-Colusa Rd just east of Two Mile Rd, ca. 2 mi east of Maxwell. Between road and irrigation ditch. 27 Comment
  CAS-BOT-BC305302  Grindelia hirsutula Roxana S. Ferris 1926-4-23 6397 Colusa Williams Comment
  JEPS108720  Grindelia hirsutula Lowell 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 1/2 miles east of Maxwell 24 Comment
  SEINET266959  Grindelia hirsutula var. davyi Meredith A. Lane 1986-9-8 3108 Colusa 2 mi E of Colusa on CA state hwy 20. Comment
  UC71636  Guillenia lasiophylla Miss Alice King 1905-1 Colusa College City Comment
  JEPS81334  Hackelia amethystina L. R. Heckard and J. C. Hickman 1982-7-6 5948 Colusa s side of Snow Mountain (western edge of West Peak Ridge); , West Peak Ridge Comment
  UCD85150  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa 3.5 miles south of Colusa. Comment
  CAS-BOT-BC230059  Harmonia hallii Ellen Dean; G. Harrington; K. Mawdsley; J. Shepard 2010-5-1 5966 Colusa Walker Ridge on border of Lake and Colusa Counties. Along Walker Ridge Rd., just E of Barrel Springs area 721 Comment
  JEPS94768  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  JEPS83144  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  CAS-BOT-BC309381  Helenium puberulum Roxana Stinchfield 1916-7-8 393 Colusa Bed of Sycamore Slough near Sycamore Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  CAS-BOT-BC305505  Helianthus bolanderi Roxana Stinchfield 1916-7-11 431 Colusa Davis tule near Sycamore Slough Comment
  UC727672  Helianthus bolanderi Milo S. Baker 1946-9-4 11616 Colusa near Locked Gate; Colusa Gun Club, Butte Sink 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
  UCD61457  Helianthus bolanderi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3903 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCD64041  Helianthus bolanderi Craig D. Thomsen 2000-6-23 2426 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCD66875  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5078 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thomspon Creek headwaters and loops back to Ridge trail. Large, dammed stock pond, holding water still in middle of meadow. Comment
  RSA0105551  Heliotropium curassavicum subsp. oculatum Lowell Ahart 2013-10-1 19096 Colusa Inner North Coast Range. 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
  CHSC113041  Heliotropium curassavicum var. oculatum Lowell Ahart 2013-10-1 19096 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
  POM64436  Heliotropium curassavicum var. oculatum Roxana Stinchfield 1916-6-17 281 Colusa Near Tule College City. Comment
  UC1563854  Hemizonia clevelandii Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8876 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  UC762758  Hemizonia clevelandii R. F. Hoover 1938-6-11 3596 Colusa Williams, Wilbur Springs Rd. Comment
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  SEINET10797452  Hemizonia congesta subsp. clevelandii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 382 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  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
  POM56197  Hemizonia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa. Comment
  CHSC70861  Hesperevax acaulis var. robustior Vernon Oswald; Lowell Ahart 1998-4-21 8948 Colusa Goat Mtn. Rd. 0.2 mi southwest of Stonyford-Lodoga Rd. Bordering the road. 390 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
  CHSC86871  Hesperevax caulescens B. Castro; Beth Hendrickson 2003-4-7 1415 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. 184 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
  UCD82529  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2885 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
  CAS-BOT-BC175981  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  JEPS32277  Hesperolinon californicum W. L. Jepson 1938-6-11 18988 Colusa on creek 4 mi se Wilbur Springs (sw Colusa Co.); Bear Creek Comment
  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
  UC1212442  Hesperolinon californicum Herbert L. Mason 1946-5-31 12815 Colusa 1 mi e Lake County line (Bartlett Springs to Williams road, western Colusa County); Inner North Coast Ranges Comment
  UCD61439  Hesperolinon californicum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3884 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile NW of parking lot in hills to the west of Bear Creek. 356 Comment
  UCR200666  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch, southwest of intersection between Hwy 16 and Hwy 20, Cowboy Camp farea on the west side of Hwy 16, 1 mile south of Hwy 20, 0.25 mi. west of public viewing area and Bear Creek Comment
  UC1552829  Hesperolinon californicum Frederica Bowcutt 1985-5-5 511 Colusa nw Wilbur Springs; Big Valley Shale Barrens 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
  CHSC83165  Hesperolinon disjunctum Beecher Crampton 1995-6-4 10323 Colusa Colusa-Lake County Border: State Highway 20. 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
  HSC96809  Hesperolinon disjunctum L. Ahart 2006-6-11 12675 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
  JEPS110118  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
  UC1212484  Hesperolinon disjunctum Helen K. Sharsmith 1952-6-21 4158 Colusa 0.9 mi e Cook Springs; Inner North Coast Ranges 518 Comment
  UC1212487  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca one mi above Diversion Dam of Big Stony Creek (near road from Stoneyford to Fouts Springs); Inner North Coast Ranges, Mendocino National Forest; above Diversion Dam of Big Stoney Creek, Mendocino National Forest, Colusa Co. 518 Comment
  UC1212497  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4031 Colusa near Mill Creek at junction with road to Black Diamond Ridge; Inner North Coast Ranges, Mendocino National Forest, Fouts S 457 Comment
  UCD67005  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2741 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
  UCR263626  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 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
  UCR45096  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CHSC111651  Hesperolinon drymarioides David Isle; Niall McCarten, Roxanne Bittman 1987-5-26 2062 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. On N slope openings in serpentine chaparral N of Cook Springs (at end of rd). 463 Comment
  OBI12541  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa Inner North Coast Ranges. North cyn slope overlooking Cook springs 549 Comment
  UC1212301  Hesperolinon drymarioides Helen K. Sharsmith 1953-7-1 4407 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  SBBG83904  Hesperolinon micranthum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd 670 Comment
  UCD66692  Hesperolinon micranthum Craig D. Thomsen 2000-6-23 2373 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  RSA0089768  Heteranthera dubia Dean Wm. Taylor 2014-5-18 21476 Colusa 3.5 miles southwest of Maxwell; eastern bank of the Glenn-Colusa Canal downstream of the crossing of Fairview Road. 35 Comment
  UCR141657  Heteranthera dubia R. Yeo 1976-1 s.n. Colusa 3 mi N of Williams, Glenn-Colusa Canal irrigation district 24 Comment
  JEPS60199  Heterocodon rariflorum L. R. Heckard 1969-5-28 2235 Colusa about 6 air mi w Stonyford (along Stony Creek at Fout Springs); Stony Creek, Fout Springs 518 Comment
  CDA16130  Heteromeles arbutifolia G. F. Hrusa 1999-2-13 14913 Colusa North Coast Ranges; Along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  UC2042506  Heteromeles arbutifolia Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 6.1 miles N from its intersection with Hwy 20 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
  JEPS73514  Hieracium albiflorum L. R. Heckard 1972-7-10 3132 Colusa 3 mi nw Fouts Springs (near promontory on se corner of Snow Mt.); Snow Mt. 1828 Comment
  UCD163858  Hoita macrostachya Craig D. Thomsen 2001-5-31 2538 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  JEPS120708  Holocarpha virgata subsp. virgata Lowell Ahart 2013-10-1 19099 Colusa South end of the parking area, near strand of East Park Reservoir, about 2 air miles SE of Stonyford, about 3 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1563895  Holocarpha virgata subsp. virgata Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8875 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  UCD20203  Hordeum brachyantherum J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 12.2 miles north of junction of Hwys 20 and 16. Comment
  UCD61443  Hordeum brachyantherum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3888 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
  UCD70230  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Perennial plant communities close to serpentine temporal vernal pools. 370 Comment
  UCD82472  Hordeum brachyantherum Craig Thomsen; G. Harrington 2009-5-12 2848 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC112029  Hordeum brachyantherum David Isle; Rhonda Isle, Justin Isle 1988-5-22 2098 Colusa Mendocino National Forest, Pendell Ranch, S of Fouts Springs Rd 18N01 (M10), ~2 miles W of Co. Rd. ~150 yds south of Pendel home. 384 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
  JEPS81292  Hordeum brachyantherum subsp. californicum L. R. Heckard and J. C. Hickman 1982-7-5 5904 Colusa s side Snow Mountain (slope below (s of) area, Summit Springs); s side Snow Mountain, Summit Springs 1500 Comment
  CAS-BOT-BC284988  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  CHSC53989  Hordeum jubatum Vernon H. Oswald 1991-4-21 4526 Colusa Four Mile Rd, 1.9 mi north of Maxwell Colusa Rd. Roadside ditches in area of rice fields. 27 Comment
  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
  CHSC111692  Hordeum marinum subsp. gussoneanum David Isle; Rhonda Isle, Justin Isle 1988-5-22 2099 Colusa Middle Fork Stony Creek Watershed. Field S of Pendell home, S of Fouts Springs Rd 18N01 (M1)), 2 miles W of Co. Rd. 306 jct. w/Fouts Springs Road. 384 Comment
  CHSC83698  Hordeum murinum subsp. leporinum L. P. Janeway 2002-4-24 7521 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  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
  CHSC88588  Horkelia californica subsp. dissita L. P. Janeway; B. Castro 2001-6-3 7100 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. Meadow. 884 Comment
  JEPS80245  Horkelia californica subsp. dissita L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa w Summit Springs (Snow Mt.); , w of Summit Springs 1554 Comment
  JEPS81278  Horkelia californica subsp. dissita L. R. Heckard and J. C. Hickman 1982-7-5 5889 Colusa south side of Snow Mt., Slope below (sout of) area Snow Mt., Summit Springs 1500 Comment
  RSA700357  Horkelia californica subsp. dissita L. P. Janeway, B. Castro 2001-6-3 7100 Colusa Inner N Coast Ranges, Spring at Grapevine Flat, on top of Walker Ridge 0.8km E of Baldy Mtn. Comment
  UC1051739  Hydrophyllum occidentale Helen K. Sharsmith 1953-6-20 4295 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  JEPS80831  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1981-8-1 5803 Colusa s. side Snow Mt. (lower Foutch Camp Meadow) 1844 Comment
  CDA8779  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Highway 20, ca. 7.8 miles northeast of its junction with State Highway 16, at base of Salt Canyon. (39.10754 N, 122.30873 W) Comment
  CHSC105470  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  SEINET255491  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  UCD57282  Hypochaeris glabra Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3650 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
  RSA0013871  Ibicella lutea Richard Snow 1958-8-3 671 Colusa Near State Highway 20, on the road to Leesville. Comment
  JEPS81321  Iris fernaldii L. R. Heckard and J. C. Hickman 1982-7-6 5936 Colusa wilderness area above Summit Springs (s side of Snow Mt, near entrance and parking to Snow Mt); Snow Mt. 1584 Comment
  UCD58172  Iva axillaris Gordon Harrington 2007-5-31 62 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  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
  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
  JEPS80247  Juncus bolanderi L. R. Heckard and J. C. Hickman 1980-9-15 5425 Colusa w of Summit Springs; Snow Mt. 1554 Comment
  JEPS80753  Juncus bolanderi L. R. Heckard and J. C. Hickman 1981-7-29 5718 Colusa s side Snow Mt. (around Summit Springs); , Summit Springs 1554 Comment
  CHSC107974  Juncus bufonius var. bufonius B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1859 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  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
  JEPS15540  Juncus covillei var. obtusatus G. Thomas Robbins with L. R. Heckard 1956-7-25 3698 Colusa se extension Snow Mt. West (at e base of ridge that forms extension, about 0.5 air mi from its summit, Lake-Colusa County boundary) 1889 Comment
  JEPS80270  Juncus ensifolius L. R. Heckard and J. Hickman 1980-9-16 5453 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 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
  JEPS75732  Juncus howellii L. R. Heckard 1974-9-9 3871 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  UCD18851  Juncus mexicanus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 159 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC88579  Juncus oxymeris L. P. Janeway 2001-6-6 7115 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  UCD141759  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  CHSC91664  Juncus xiphioides G. D. Barbe; Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley. Along Goat Mountain Road, w of Lodoga-Stonyford Rd., Mendocino National Forest. Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  POM163455  Juniperus californica Roxana S. Ferris 1926-4-23 6456 Colusa 4 miles from [south of] Stonyford on the Leesville Road Comment
  CHSC65613  Juniperus occidentalis J. Ingraham 1995-4-13 6 Colusa 1 mi N of Davis Creek on hwy 395, 100 yds. E of junction of Co. Rd. 133B and Hwy 395, 100 yds E. 1487 Comment
Read comments
Jul 25 2018
  JEPS80759  Keckiella lemmonii L. R. Heckard and J. C. Hickman 1981-7-29 5726 Colusa s side Snow Mt. (along trail from Summit Springs) 1706 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
  CHSC94458  Kickxia elatine Lowell Ahart 2006-8-9 13134 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC637057  Kickxia elatine Edward Lee 1934-8-9 1011 Colusa 4 mi n Willows; Sacramento Valley Comment
  CAS-BOT-BC341395  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa Ridge between Venado and Leesville Comment
  JEPS110184  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  OBI15966  Lagophylla minor Robert F. Hoover 1968-5-27 11098 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  UC596300  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge between Venado and Leesville 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
  JEPS39671  Lagophylla minor Rimo Bacigalupi, T. Crovello, and L. Heckard 1965-4-26 9046 Colusa on road to Bartlett Springs 2 mi from Ladoga junction (summit w of Bear Valley, Colusa-Lake County boundary) 670 Comment
  SBBG128767  Lagophylla minor L. Ahart 2013-5-1 18680 Colusa near a small drainage, N of the wash and 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
  CAS-BOT-BC341470  Lagophylla ramosissima L. R. Abrams 1928-5-8 12586 Colusa 2 miles south of Arbuckle Comment
  JEPS119421  Lagophylla ramosissima G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14740 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 Comment
  JEPS80244  Lagophylla ramosissima L. R. Heckard and J. Hickman 1980-9-15 5419 Colusa slopes w of Summit Springs; Snow Mt. 1554 Comment
  UCR206352  Lagophylla ramosissima George K. Helmkamp, E. A. Helmkamp 2009-5-20 14740 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCD135735  Lagophylla ramosissima Bruce G. Baldwin 1986-6-1 484 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  RSA0034036  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
  HSC48034  Lasthenia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3939 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  POM53876  Lasthenia ferrisiae Roxana S. Ferris 1917-4-12 503 Colusa 4 miles east of Williams. Comment
  RSA31635  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 miles N of Maxwell. Comment
  UC725317  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 mi n Maxwell Comment
  CAS-BOT-BC353480  Lasthenia fremontii A. A. Heller 1921-4-10 13546 Colusa Near Colusa Comment
  SD225735  Lasthenia fremontii Carol Witham, 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. 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
  CHSC107929  Lasthenia glaberrima B. Castro; L. Janeway 2011-4-27 1862 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 Comment
  CHSC27622  Lasthenia glabrata Timothy Spira; Robert Schlising 1978-5-13 3250 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (=Wilber Springs) Road. Comment
  HSC90077  Lasthenia glabrata C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 45 Colusa 100 m off Bear Valley Rd., 1.2 mi. S of junction with Walker Ridge Rd. 409 Comment
  CAS-BOT-BC328107  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa Tule land 3 miles W of Colusa Comment
  CHSC79464  Lasthenia glabrata subsp. glabrata Simona Altman 1999-4-3 51 Colusa Bear Valley, Bear Valley Rd. 396 Comment
  HSC92634  Lasthenia glabrata subsp. glabrata Eric B. Peterson, Thomas Ward, Matt Foruria 1995-4-1 55 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  RSA293117  Lasthenia glabrata subsp. glabrata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9529 Colusa Bear Valley Road, 5 miles from its junction with State Route 20. 390 Comment
  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
  UC71630  Lasthenia gracilis Miss Alice King 1905-1-1 Colusa College City Comment
  JEPS80788  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1981-7-30 5761 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1584 Comment
  UCD80896  Lathyrus vestitus Ellen Dean; G. Harrington 2009-3-27 5296 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Along road that connects Lynch Canyon and the Ridge Trail on slope above road. 453 Comment
  CAS-BOT-BC323885  Layia chrysanthemoides Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 44 Colusa Along Bear Valley Rd. 1.2 miles S of the junction with Brim Rd. 414 Comment
  CHSC53936  Layia chrysanthemoides Vernon H. Oswald 1991-4-21 4521 Colusa Bear Valley Rd in Bear Valley, 1.0 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. Roadside. 417 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
  CHSC82611  Layia chrysanthemoides Tara Morgan 2002-4-6 16 Colusa Found in Bear Valley located west of Highway 5 and north of Highway 20 within pastures. 385 Comment
  HSC86895  Layia chrysanthemoides Anthony J. Desch, Bryon Cariss 1988-4-17 39 Colusa 1.3 mi. S on Bear Valley Rd. from the corner of Brim Rd. and Bear Valley Rd. Comment
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  JEPS39184  Layia chrysanthemoides W. I. Follette 1935-3-31 Colusa Williams Comment
  RSA424743  Layia chrysanthemoides Aaron Liston, M. Blumler 1987-4-26 667 -5 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UC761874  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado 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
  UCR212376  Layia chrysanthemoides Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4663 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  CAS-BOT-BC323904  Layia chrysanthemoides Roxana S. Ferris 1917-4-12 506 Colusa 4 miles E of Willaims. Alkali Plains. Comment
  HSC95341  Layia chrysanthemoides A. Hove, A. Poteet, C. Sanville 1999-5-1 40 Colusa Bear Bear Valley Rd., 2 km S of Brim Rd. 415 Comment
  SEINET5712161  Layia chrysanthemoides Russell Lester 1975-1 13 Colusa 3.9 miles south of Leesville in Bear Valley.; Bear Valley Comment
  UCR7836  Layia fremontii Marilyn Malin 1968-3-30 243 Colusa Coast Range, north side of Hwy 16, between Hwy 16 and Cache Creek at jct of Hwy 16 and Hwy 20 Comment
  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
  HSC92539  Layia platyglossa S. Morrissette, J. Williams, K. Kopper 1994-4-24 23 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  JEPS119416  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14358 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa Comment
  JEPS74816  Layia platyglossa L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4025 Colusa in center of Bear Valley meadows; Leesville Comment
  UCD163306  Layia platyglossa Craig D. Thomsen 1997-4-20 1909 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  CAS-BOT-BC380898  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  HSC85860  Layia platyglossa Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Along dirt road running N-S through Bear Valley 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-BC329322  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa Summit of ridge, Comanche Hills, 4 miles NE of Rumsey 254 Comment
  JEPS95624  Layia septentrionalis Vernon H. Oswald and L. Ahart 1994-3-23 6020 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  UC75946  Layia septentrionalis Miss M. Alice King 1905-1-1 Colusa near College City Comment
  UCR261736  Layia septentrionalis Ann Howald 2003-4-23 2307 Colusa Inner North Coast Ranges, Lodoga-Stonyford Road, c. 0.1 mile north of road crossing of Little Stony Creek 382 Comment
  UC1101247  Lemna aequinoctialis Malcolm A. Nobs, S. Galen Smith 1949-9-10 1889 Colusa about 1 mi s of Maxwell 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
  CHSC116673  Lemna minuta Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20723 Colusa Small pond on the east side of the graveel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 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
  POM312456  Lemna minuta H. L. Mason, Verne Grant 1946-8-6 12966 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of Sacramento River. Comment
  CAS-BOT-BC527290  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
  RSA141287  Lemna trisulca J. M. Tucker, L. K. Mann, John Tothill 1959-5-30 3532 Colusa Small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout 1220 Comment
  CAS-BOT-BC534910  Lemna turionifera Verne Grant; Herbert L. Mason 1946-8-6 12966 Colusa Pond on Colusa-Marysville Highway, four miles south of Colusa, west side Sacramento River Comment
  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
  UCR201550  Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14257 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CHSC111210  Lepidium latifolium David Isle 2013-9-23 2050 Colusa Salt Creek N of Dennis Dr. bridge; Isle property. Comment
  CAS-BOT-BC89762  Lepidium latipes M. K. Curran 1885-1-1 s.n. Colusa Williams. 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
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  CHSC86962  Lepidium strictum B. Castro 2003-4-10 1424 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In bed of dirt road near confluence of small creeks, on west edge of Sacramento Valley. 85 Comment
  SEINET11293823  Lepidium strictum R. R. Halse 2012-3-28 8453 Colusa Williams, along 5th Street between intersections with C and D Streets, near railroad tracks. 24 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
  UCD14331  Leptosiphon bicolor G. Robinson 1984-4-21 4 Colusa Colusa Co.; Bear Valley, ca. 40 meters west of Wilber Springs Road, east of creek, 3.2 miles north of Highway 20; 390 Comment
  CHSC79791  Leptosiphon bolanderi L. P. Janeway; B. Castro 2000-5-4 6706 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD67031  Leptosiphon bolanderi Ellen Dean; Davis Botanical Society 2008-5-31 5013 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  POM310950  Leptosiphon bolanderi H. L. Mason 1941-4-5 12404 Colusa Three miles south of Stonyford Comment
  CHSC25156  Leptosiphon ciliatus J. D. Sagray 1970-4-4 4 Colusa 15 mi w of Williams at the junction of Hwy 20 and 16. 350 Comment
  CHSC40735  Leptosiphon ciliatus L. Constance 1938-4-22 2149 Colusa Above Salt Creek, Lower Lake-Williams road 11 mi. NE. of Lake-Colusa line, Inner North Coast Ranges. 152 Comment
  CHSC86028  Leptosiphon ciliatus 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
  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
  HSC99741  Leptosiphon ciliatus J. Carey, A. Hong, J. Leffingwell 1995-5-7 86 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  RSA589922  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7291 Colusa Along Bear Valley Rd., 2.5 mi N jct. Wilbur Springs Rd. Comment
  RSA589923  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7288 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  HSC41863  Leptosiphon latisectus K. Irwin 1977-4-24 301 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  JEPS123230  Leptosiphon latisectus David Gowen 2010-6-14 1128 Colusa Serpentine road bank along ridgetop of Walker Ridge Road Comment
  CHSC19694  Leptosiphon parviflorus L. A. Wright Jr. 1971-3-27 10 Colusa Ca. 7 mi w of Williams on Hwy 20, off the s side of the road about 150 ft, in a meadow next to a stream. 91 Comment
  CHSC70992  Leptosiphon parviflorus Vernon Oswald; Lowell Ahart 1998-5-7 9006 .1 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  UCD70252  Lessingia micradenia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UC1563897  Lessingia micradenia var. glabrata Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8868 Colusa Brim Road sw Leesville (to Indian Valley Reservoir) 609 Comment
Read comments
Feb 20 2012
  JEPS11965  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
  JEPS120715  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 Colusa Near a small drainage, north of the wash and State Highway 20, just east of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  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
  UCD58177  Lessingia ramulosa Gordon Harrington 2007-5-31 68 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  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
  UCD134101  Lessingia ramulosa Vernon H. Oswald; Lowell Ahart 1998-7-15 9276 Colusa west side of county on Sawtelle Valley Road 0.4 mile north of Bartlett Springs Road. 670 Comment
  UCD56681  Lewisia rediviva Roger Willmarth 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
  HSC49866  Lewisia rediviva J. P. Smith, J. O. Sawyer 1978-4-29 9779 Colusa Lake/Colusa County Line; Walker Ridge Rd., 4.8 mi. N from the T-intersection to Indian Valley Reservoir Comment
  UC38247  Leymus triticoides J. Burtt Davy May, 1898 4290 Colusa near Princeton Comment
  UCD164136  Leymus triticoides Craig Thomsen 1998-6-12 1940 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA32489  Leymus triticoides W. C. Disney Jr. 1959-5-8 2344 Colusa Princeton area 0 Comment
  JEPS96000  Lilium pardalinum subsp. pardalinum Vernon H. Oswald and L. Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate 426 Comment
  UCR118966  Limnanthes douglasii subsp. nivea Beecher Crampton 1975-4-21 9167 Colusa Inner North Coast Ranges, Mendocino National Forest, 1 mile west of Lodoga 396 Comment
  UCD33936  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9167 Colusa Colusa County, 1 mile west of Lodoga. Comment
  UCD33941  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9173 Colusa Colusa County, 4 miles N.W. of Lodoga by road. Comment
  JEPS58265  Linanthus bolanderi W. L. Jepson 1932-5-8 16269 Colusa Lodoga, w Colusa Co. Lodoga 457 Comment
  UC106862  Linanthus bolanderi T. S. Brandegee Apr 1889 Colusa Leesville Comment
  UC971715  Linanthus bolanderi Herbert L. Mason 1941-4-5 12404 Colusa 3 mi s Stonyford Comment
  SEINET7096751  Linanthus ciliatus A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 miles south of Route 20 and near Bear Creek. NAD27, 39? deg. 00' 36ao, -122?_ 21' 22ao (converted to WGS84 decimal degrees) Comment
  CHSC53973  Linanthus dichotomus Vernon H. Oswald 1991-4-21 4519 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  UC907804  Linanthus dichotomus Herbert L. Mason 1941-4-5 12407 Colusa 1 mi s Stonyford Comment
  UC1051513  Lithophragma campanulatum Helen K. Sharsmith 1953-7-1 4403 Colusa above Linger Longer Camp Goat Mountain (Goat Mountain); Inner North Coast Ranges, 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
  UCD81245  Lithophragma heterophyllum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5409 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  HSC72155  Lithophragma parviflorum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9568 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC45699  Logfia filaginoides Christopher Knopp 1978-4-22 12 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 412 Comment
  RSA0118614  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Range. On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD143424  Lomatium Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. 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
  SEINET13944350 Image available Lomatium ciliolatum Bonnie Prange 1974-1 sn Colusa Wilbur Springs Quad. Near Clyde Mine. Elev 2800 ft 853 Comment
  UC1409830  Lomatium ciliolatum var. ciliolatum James E. Eckenwalder and Dale E. Johnson 1974-6-2 358 Colusa below summit of East Peak Snow Mt. (on divide between East & West Peaks); , East Peak 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
  UC71660  Lomatium dasycarpum subsp. tomentosum Miss Alice King 1905-1 Colusa College City Comment
  CHSC70858  Lomatium hooveri Vernon Oswald; Lowell Ahart 1998-4-21 8943 Colusa Stonyford-Logoda Rd. 3.7 mi south of Stonyford. 384 Comment
  LA90233  Lomatium hooveri Lincoln Constance; 1965-4-13 3756 Colusa Between Clear Lake Oaks and Williams, Highway 20, 2.7 mi. W of Highway 16 548 Comment
  UC1178993  Lomatium hooveri Herbert L. Mason 1947-3-30 13164 a Colusa 0.5 mi E of Lake Co. line on Williams-Lower Lake Highway western Colusa Co. Comment
  UC1312855  Lomatium hooveri L. Constance 1965-4-13 3756 Colusa between Clear Lake Oaks and Williams (Hwy. 20 2.7 mi. w. of Hwy. 16) 548 Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  JEPS121106  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa On the N side of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  SEINET11263259  Lomatium macrocarpum Richard R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 miles S of Logoda. Indian Valley.; 0 425 Comment
  UCD58110  Lomatium macrocarpum Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3370 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. South of Destanella. 548 Comment
  CDA33696  Lomatium marginatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC77720  Lomatium marginatum var. purpureum B. Castro; M. A. Griggs, L. P. Janeway, B. Hendrickson 1999-4-12 875 Colusa About 8 miles NW of Maxwell, vicinity of Peterson Rd and Logan Ridge. 134 Comment
  CHSC77910  Lomatium marginatum var. purpureum Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Sites and Stone Corral Creek. 121 Comment
  CHSC81211  Lomatium utriculatum Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  JEPS17548  Lomatium utriculatum Alice King May, 1906 Colusa College City Comment
  UCD56934  Lomatium utriculatum Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3536 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Thompson Canyon. 344 Comment
  SEINET13944679 Image available Lomatium utriculatum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  UCD70235  Lonicera interrupta D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 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
  UCD57469  Lotus corniculatus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3682 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Thompson Canyon, north side of trail adjacent to creek. 362 Comment
  CDA15480  Lotus crassifolius var. crassifolius G. F. Hrusa, W. T. Wilfred 1998-6-19 14617 Colusa North Coast Ranges; Along USFS Pacific Ridge Rd. (M5) above intersection with Goat Mtn. Rd. Comment
  JEPS60203  Lotus crassifolius var. crassifolius L. R. Heckard 1969-5-29 2239 Colusa about 6.5 mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  JEPS60198  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa on road above and w Fouts Springs 762 Comment
  JEPS60200  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2236 Colusa about 5 mi w Stonyford (along Trough Spring Ridge road 0.5 mi sw of its junction with the Stonyford-Fouts Spring road); Trough Spring Ridge 731 Comment
  RSA516410  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road (about 6-1/2 air miles southeast of Stonyford). 1128 Comment
  HSC72211  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1980-6-24 5879 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  JEPS80180  Lotus humistratus L. R. Heckard with J. Hickman 1980-7-3 5332 Colusa just w Summit Springs (sw Snow Mt., ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1548 Comment
  JEPS110105  Lotus purshianus var. purshianus Lowell Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR205138  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14242 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  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
  CHSC33400  Lupinus Rene T. Retuta 1978-4-4 8 Colusa Ca. 0.3 mi w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca 18 mi. sw of Williams. 579 Comment
  CAS-BOT-BC198401  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams Comment
  POM299305  Lupinus albifrons var. albifrons H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams. Comment
  JEPS22986  Lupinus albifrons var. collinus Stanton A. Cook 1959-5-30 891 Colusa n of the summit Goat Mountain; n of the summit of Goat Mountain 1828 Comment
  JEPS80129  Lupinus albifrons var. collinus L. R. Heckard with J. Hickman 1980-7-1 5288 Colusa ca 10 mi w Stonyford (on trail from Summit Springs to Frog Lake, Colusa-Lake County boundary); Snow Mt., trail fr Summit Springs to Frog Lake 1706 Comment
  RSA799177  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17121 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 77 Comment
  UCR224884  Lupinus albifrons var. collinus Ellen Dean, Gordon Harrington, Kate F. Mawdsley, Jean V. Shepard 2010-5-1 5945 A Colusa Walker Ridge, along Walker Ridge Road at intersection with road to Eaton Springs, east 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
  HSC72138  Lupinus bicolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9570 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  RSA724140  Lupinus bicolor Richard R. Halse 2002-3-21 6131 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET5328111  Lupinus bicolor R. R. Halse 2002-3-21 6131 Colusa Williams; by junction 5th St. and B St. 24 Comment
  UCD56899  Lupinus bicolor Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3502 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  HSC89739  Lupinus bicolor A. Eller, A. Smith, B. Hoffman 1989-4-15 20 Colusa Brim Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  POM278280  Lupinus bicolor subsp. tridentatus Lyman D. Benson 1935-3-27 6329 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  SEINET10838151  Lupinus bicolor subsp. tridentatus Smith 1978-4-2 Smith 9570 Colusa Colusa co. T14n, r5w, sec. 34. Bear valley rd., 2.1 Miles from its junction With state route 20. Rock faces in metasedimentary chaparral. 366 Comment
  CHSC3940  Lupinus densiflorus var. aureus M. Lee 1967-4-29 20 Colusa On N side of Hwy 20 ca. 26 mi. west of Williams. Comment
  POM20193  Lupinus densiflorus var. aureus Roxana S. Ferris 1917-4-14 584 Colusa 7 miles west of Arbuckle, along Sand Creek. Arbuckle-Ramsey Road. Comment
  RSA424727  Lupinus densiflorus var. aureus Aaron Liston, M. Blumler 1987-4-26 617 -1 Colusa 15.7 miles south of Stonyford. Lessville - Lodoga Road. 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
  CAS-BOT-BC8380  Lupinus formosus subsp. formosus Amos Arthur Heller 1940-4-21 15543 Colusa US Hwy 99W, 2 miles S of Williams Comment
  UCD107811  Lupinus grayi Tammy S. Smith 1985-4-13 10 Colusa ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18.0 mi sw of Williams. 321 Comment
  UCD66957  Lupinus latifolius var. latifolius Ellen Dean; Davis Botanical Society 2008-5-31 5001 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1099 Comment
  CHSC71113  Lupinus microcarpus var. densiflorus Jan Monelo 1989-4-1 7 Colusa In hillside spanning Hwy 20. Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  OBI56805  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  SD52958  Lupinus microcarpus var. densiflorus Peter H. Raven 1962-5-31 17910 Colusa Stae Hwy 20, 2.5 miles east of Lake County line Comment
  UC614851  Lupinus microcarpus var. densiflorus Beryl O. Schreiber 1932-4-3 223 Colusa road to Williams; road to Williams Comment
  CHSC29255  Lupinus microcarpus var. microcarpus Gary McGrath 1977-4-16 9 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. 143 Comment
  UCR212341  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  RSA424766  Lupinus nanus var. apricus Aaron Liston, M. Blumler 1987-4-26 667 -9 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  HSC45690  Lupinus succulentus Patricia Shesgreen 1978-4-22 28 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  POM276532  Lupinus succulentus Lyman D. Benson 1935-3-27 6336 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  JEPS80282  Luzula cascadensis L. R. Heckard and J. Hickman 1980-9-16 5457 Colusa Northeast slope West Peak, cirque area between peaks, Snow Mt. 2011 Comment
  JEPS80283  Luzula cascadensis L. R. Heckard and J. Hickman 1980-9-16 5457 Colusa Northeast slope West Peak, cirque area between peaks, Snow Mt. 2011 Comment
  CDA5761  Lycium barbarum G. D. Barbe 1975-10-23 2091 Colusa 7th and Market Streets, Colusa. 0 Comment
  UCD66529  Lycium barbarum Craig D. Thomsen 2000-4-28 2230 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. Just west of massive valley oak along Bear Creek, near base of Hwy 20 fill slope. 300 Comment
  JEPS108741  Lythrum hyssopifolia Lowell Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CDA34965  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa Southeast end of East Park Reservoir, north of Lodoga. Comment
  CHSC106708  Lythrum tribracteatum Barbara Ertter; Elizabeth Neese, laure Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga, narrow strand on shaly substrate. 365 Comment
  CHSC84956  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 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
  CHSC94480  Lythrum tribracteatum Lowell Ahart 2006-8-9 13162 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD67069  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5097 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
  JEPS80798  Madia elegans L. R. Heckard and J. C. Hickman 1981-7-30 5768 Colusa about 100 ft above on n side Trout Creek (se side of mountain); Snow Mt. 1554 Comment
  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
  UCD57446  Madia gracilis Gina Darin; 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. Along trail, north side of Thompson Creek. 374 Comment
  UCR206383  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14753 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 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
Read comments
Sep 25 2006
  RSA32810  Malacothamnus helleri A. A. Heller 1940-6-7 s.n. Colusa Near foot of grade east of Lodogo, on Sites-Lodogo Road Comment
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UCD66682  Malacothrix floccifera Craig D. Thomsen 2000-5-11 2309 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CAS-BOT-BC347386  Malacothrix floccifera Volney Rattan 1884-1-1 s.n. Colusa Unspecified Comment
  CAS-BOT-BC347388  Malacothrix floccifera Volney Rattan 1884-1-1 s.n. Colusa Unspecified Comment
  UC18727  Malva nicaeensis J. Burtt Davy May, 1898 4276 Colusa near Willows Comment
  SEINET7096534  Malva parviflora Richard R. Halse 2001-3-22 5945 Colusa Williams; along a vacant lot by 455 - 4th street Weedy roadside; 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  UC35242  Malva parviflora J. Burtt Davy May, 1898 4279 Colusa near Willows Comment
  POM62148  Malvella leprosa Roxana Stinchfield 1916-6-17 294 Colusa At Tule levee, College City. Comment
  UC1368667  Malvella leprosa L. M. Moe 1969-7-29 98 Colusa along Butte Creek ca. 3 mi. n.e. Colusa (also along rd. of Butte Creek Outing Club property); Butte Creek Comment
  SBBG121613  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa N side of the Gridley Colusa Hwy ca. 1.25 mi E of River Rd, ca. 17 mi W of Gridley 20 Comment
  UC871130  Malvella leprosa A. A. Heller 1916-6-9 12393 Colusa along state hwy. near Colusa Comment
  UCD169735  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
  SEINET11990999  Marah oregana R. A. DeMartile 1983-1 106 Colusa Goat Mountain Rd 914 Comment
  CHSC46939  Marah watsonii Glenn Keator 1966-4-24 Colusa Junction of Rail Canyon Road and Sites-Lodoga Road. Comment
  UCD66594  Marah watsonii Craig D. Thomsen 2000-4-28 2241 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66689  Marah watsonii Craig D. Thomsen 2000-5-11 2319 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CDA36216  Marrubium vulgare G. K. Helmkamp, E. A. Helmkamp 2009-5-2 14757 Colusa Inner North Coast Ranges; Along CA-16, 1.8 miles north of the Yolo County line. Comment
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC89518  Matricaria discoidea T. S. Brandegee April 1889 Colusa Colusa Junction Comment
  UCD163883  Matricaria discoidea Craig D. Thomsen 2002-4-10 2593 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
  UC75895  Matricaria occidentalis Miss M. Alice King 1905-1 Colusa near City College; Sacramento Valley Comment
  CHSC94450  Medicago lupulina Lowell Ahart 2006-8-9 13123 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD63031  Medicago minima Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  HSC45689  Medicago polymorpha Patricia Shesgreen 1978-4-22 30 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SEINET3287499 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  UCD56908  Medicago polymorpha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3511 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  CHSC79529  Melia azedarach B. Castro; L. P. Janeway 2000-5-1 1101 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 205 Comment
  JEPS120981  Melica californica Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18639 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
  UCD163713  Melica californica Craig Thomsen 1999-5-10 2025 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD57285  Melica californica Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3656 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
  UCD82124  Melica californica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5653 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
  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
  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
  UCD56672  Melica torreyana Jack Alderson 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  UCD57297  Melica torreyana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3668 Colusa BLM Payne Ranch. Near junction of Craig and Thompson Canyons. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Upslope of unimproved road, above side branch of Craig Canyon, downslope of saddle separating Craig and Thompson Canyons. 370 Comment
  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
  UCR212338  Melica torreyana Craig D. Thomsen 2001-5-24 2510 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.25). 342 Comment
  JEPS108722  Melilotus albus Lowell Ahart 2006-9-26 13349 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
  POM20221  Melilotus albus Roxana Stinchfield 1916-7-9 403 Colusa Overflow land along Sacramento River, Phillips Ranch. Comment
  RSA724820  Melilotus albus L. Ahart 2006-9-26 13349 Colusa 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 mils east of Maxwell. 24 Comment
  UCD72468  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3802 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
  CHSC112256  Melilotus indicus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18646 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
  RSA724950  Melilotus indicus L. Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  RSA718054  Mentha arvensis L. Ahart 2006-8-9 13090 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  CHSC94453  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS108913  Mentha canadensis Lowell Ahart 2006-8-9 13090 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  JEPS110099  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC94511  Mentha rotundifolia Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC2042873  Mentzelia dispersa Barbara Ertter 1989-7-1 8598 Colusa Road to Goat Mt. Lookout 2.2 mi S of Route M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 air miles WSW of Stonyford. Comment
  UC725296  Mentzelia dispersa A. A. Heller 1940-6-7 15718 Colusa 1 m or more e Lodogo (below the road near the foot of the grade) Comment
  SEINET199012  Mentzelia laevicaulis Helen K. Sharsmith 1953-6-21 4306 Colusa Slopes of Little Stoney Creek ca. 1 mile within boundary of Mendocino National Forest 671 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
  UC71777  Mentzelia laevicaulis var. laevicaulis H. P. Chandler 1905-10-17 Colusa Princeton Comment
  UCD170080  Mentzelia micrantha Jack Alderson 2016-5-14 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5500 feet (1675 m) south of the intersection of Highway 20 and the Colusa County line. 499 Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CAS-BOT-BC348363  Micropus californicus var. californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit of grade on Williams - Stonyford Rd Comment
  CHSC62919  Micropus californicus var. californicus Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 B Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  UC638694  Micropus californicus var. californicus Ethel Crum 1938-5-7 2011 Colusa summit of ridge 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCD82822  Micropus californicus var. californicus Craig Thomsen; G. Harrington 2009-5-12 2844 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  RSA424740  Microseris Aaron Liston, M. Blumler 1987-4-26 668 -7 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  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
  JEPS36201  Microseris douglasii subsp. douglasii W. L. Jepson 1920-5-23 8970 Colusa Bear Valley 426 Comment
  RSA275337  Microseris douglasii subsp. douglasii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3927 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  UCD64514  Microseris douglasii subsp. douglasii Craig D. Thomsen 2000-4-12 2101 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UC92169  Microseris douglasii subsp. douglasii K. Brandegee 1889-1 Colusa Comment
  UCD163671  Microsteris gracilis Craig Thomsen 1999-4-15 1971 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD56675  Microsteris gracilis Jack Alderson 2007-3-25 11 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. 571 Comment
  UCD64433  Microsteris gracilis Craig D. Thomsen 2001-3-27 2436 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  POM21052  Mimulus cardinalis Roxana Stinchfield 1916-7-9 417 Colusa Philip's Ranch, near Sycamore. Comment
  CDA41441  Mimulus douglasii S. E. Schoenig 1998-4-24 98 -8 Colusa Adjacent to clearing east of Brim Road, 1.5 miles west of Bear Valley Road. 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
  JEPS110093  Mimulus floribundus Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS110061  Mimulus guttatus Lowell Ahart 2006-8-22 13224 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  JEPS80223  Mimulus guttatus L. R. Heckard and J. Hickman 1980-7-3 5380 Colusa sw slope Snow Mt. (below pipe outlet from spring); Summit Springs 1554 Comment
  SEINET3450718  Mimulus guttatus Unknown 2003-7-14 10383 Colusa Williams, Williams, about 21 road miles southwest, open field on the south side of highway 20, about 2 miles southwest of the intersection of highway 20 and Bear Valley Road 520 Comment
  UCD82512  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2870 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  JEPS14629  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  UC1051505  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  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
  JEPS3633  Mimulus microphyllus H. L. Mason 1953-5-5 14518 Colusa 1/4 mi above confluence of Little Stony Creek and Trout Creek; Little Stony Creek drainage 670 Comment
  SEINET10756213  Mimulus moschatus Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 912 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from interesection with Forest Service route M10. T17N R8W S25. 1371 Comment
  UCD40884  Mimulus nasutus Richard Schulhof 1984-4-21 8 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 Comment
  JEPS11151  Mimulus nudatus R. F. Hoover 1941-5-2 4982 Colusa just e Lake County line (on Williams-Clear Lake highway, about 6 mi s of Wilbur Springs) Comment
  JEPS79794  Mimulus nudatus R. F. Hoover 1941-5-2 4982 Colusa just e Lake County line (on Williams-Clear Lake highway, about 6 mi s of Wilbur Springs); Williams-Clear Lake highway Comment
  JEPS108907  Mimulus pilosus Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  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
  RSA718048  Mimulus pilosus L. Ahart 2006-8-9 13105 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of stonyford. 422 Comment
  JEPS10517  Mimulus tricolor Ruth Johnson 1915-4-6 Colusa College City Comment
  HSC31564  Minuartia douglasii Teresa Prendusi 1974-5-4 49 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  UC72586  Minuartia douglasii Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD57104  Minuartia douglasii Gordon Harrington; Diana Hickson 2007-4-7 0025 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, ca .5 mi. W of Roadkill Cafe, N. of Thompson Creek. 439 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
  UC71771  Mollugo verticillata H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  UCR175120  Monardella Mark A. Elvin, Mark S. Brunell, D. Isle 2006-8-3 5021 Colusa North Inner Coast Ranges, Snow Mtn: Summit Spring Trail, 1.4 km west of Snow Mtn West summit and 800 m N of Cedar Camp 1989 Comment
Read comments
May 16 2007
  CHSC64094  Monardella glauca David Isle 1992-8-3 Colusa Snow Mountain. Comment
  CHSC48491  Monardella odoratissima subsp. pallida Vernon Oswald 1984-7-20 1611 Colusa Near the Lily Pond n of Letts Lake in the Mendocino National Forest. 1280 Comment
  UCD70238  Monardella sheltonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Bear Valley Road. Bear Valley Creek. 350 Comment
  CHSC83196  Monardella villosa D. Sanchez-Mata 1996-6-27 Colusa Williams. Blue Ridge. In Bear Creek. Comment
  SEINET9336472  Monardella villosa Mark Elvin, Isle, David; Brunell, Mark 2006-8-3 4991 Colusa Southern Northern Inner Coast Ranges Comment
  JEPS75863  Monardella villosa subsp. villosa L. R. Heckard 1974-9-10 3885 Colusa along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  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
  CDA20256  Monardella villosa subsp. villosa G. D. Barbe, Nola Parmer 1982-6-4 3637 Colusa North Coast Ranges; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  CAS-BOT-BC349577  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 426 Comment
  JEPS15267  Monolopia major Rimo Bacigalupi with G. L. Stebbins, Calvin McMillan, Peter Kamb, and S. Galen Smith 1950-4-16 3118 Colusa base grade (Bartlett Springs road) (western edge of valley); inner edge of easternmost North Coast Ranges, Bear Valley 426 Comment
  UCD163879  Monolopia major Craig D. Thomsen 2002-3-27 2574 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  UCD81240  Monolopia major Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5404 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Slopes on the north side of the canyon that is located just south of Brophy Canyon. 262 Comment
  POM256988  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 427 Comment
  JEPS80371  Montia fontana L. R. Heckard and J. Hickman 1981-6-22 5605 Colusa s side of east ridge of East Peak, Snow Mountain East Peak; Snow Mountain, East Peak 1950 Comment
  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-BC83269  Myosurus minimus Roxana S. Ferris 1917-4-10 510 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83283  Myosurus minimus James Jokerst 1986-5-6 2300 Colusa Near Lurline Creek. 41 Comment
  UC1738123  Myosurus minimus D. E. Stone 1955-5-2 7 -13 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  UC1101351  Myosurus sessilis Herbert L. Mason 1953-4-5 14508 Colusa 3 mi e of Maxwell Comment
  UC1738076  Myosurus sessilis H. L. Mason 1957-4-13 14510 B-7 Colusa 3 mi E of Maxwell (on Maxwell Rd.) Comment
  UCD96289  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  UCR227337  Najas graminea Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5106 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UC1099999  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-9-9 1891 Colusa 1 mi e of Williams Comment
  UC1100011  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa 1.6 mi w of Williams (Road to Lake County) Comment
  CAS-BOT-BC259753  Nassella cernua Roxana S. Ferris 1926-4-23 6399 Colusa Near Mountain House on Williams - Stonyford Road Comment
  CAS-BOT-BC259754  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade Willliams - Stonyford Road Comment
  POM174566  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade of Williams-Strongford Road Comment
  CAS-BOT-BC230252  Navarretia cotulifolia A. A. Heller 1916-6-9 12388 Colusa Coast Range about 2 miles W of Leesville Comment
  UC856855  Navarretia cotulifolia A. A. Heller 1916-6-9 12388 Colusa about 2 mi w Leesville; Coast Range Comment
  CHSC112917  Navarretia heterandra B. Castro; Robin Carter, Amy Lyons 2010-5-13 1808 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 131 Comment
  CHSC76766  Navarretia heterandra J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 114 Comment
  CHSC79544  Navarretia heterandra B. Castro; L. P. Janeway 2000-5-3 1124 Colusa Vicinity of Sites, Huffmaster Rd, and Grapevine Creek. 371 Comment
  UC908879  Navarretia heterandra Herbert L. Mason 1946-5-30 12816 Colusa near Eppersons; Bear Valley Comment
  JEPS80209  Navarretia intertexta L. R. Heckard and J. C. Hickman 1980-7-3 5363 Colusa Across road (north of) from Summit Springs, southwest slope of Snow Mt. 1548 Comment
  CAS-BOT-BC230316  Navarretia jepsonii Katharine Brandegee 1916-8-10 s.n. Colusa Bear Valley, near Eppersons Comment
  SEINET13711098  Navarretia jepsonii Lowell William Ahart, Lowell William Ahart 2003-1 10385 Colusa 21 Road Mi. SW of Williams, 2 Mi. SW Jct. Hwy 20 and Bear Valley Road (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  UC856832  Navarretia jepsonii A. A. Heller 1916-6-6 12356 Colusa about 3 mi w Leesville (on the grade); Coast Range Comment
  UC908621  Navarretia jepsonii Herbert L. Mason 1946-5-30 12814 Colusa about 1 mi e Lake County line (w Colusa County); Leesville Grade Comment
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD164150  Navarretia jepsonii Craig Thomsen 2000-5-12 2328 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD66870  Navarretia jepsonii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5073 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. Just south of junction with trail that heads east to the headwaters of Thompson Creek. 634 Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  CHSC79545  Navarretia nigelliformis subsp. nigelliformis B. Castro; L. P. Janeway 2000-5-1 1103 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  CHSC85965  Navarretia nigelliformis subsp. nigelliformis Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 137 Comment
  CHSC1298  Navarretia pubescens V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  UCD63739  Navarretia pubescens Craig D. Thomsen 2008-5-23 2745 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 415 Comment
  CHSC107485  Navarretia sinistra subsp. pinnatisecta David Isle; John Whittlesey 2009-7-11 1917 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Snow Mtn. Wilderness; Summit Springs Trail; Near Jeffrey Pine stand and 1987 Fouts Fire JP Snag. [Trail straddles Lake and Colusa County lines] 1645 Comment
  HSC90406  Navarretia sinistra subsp. pinnatisecta Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 49 Colusa 6 mi. E of intersection between Walker Ridge Rd. and Bear Valley Rd. 293 Comment
  CHSC89877  Navarretia tagetina B. Castro; L. Janeway, S. Innecken 2001-5-9 1246 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Along dirt road paralleling N-S-trending perennial creek. 365 Comment
  UCR261750  Navarretia tagetina Ann Howald 2003-5-29 2349 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
  UC726846  Navarretia viscidula A. A. Heller 1940-6-7 15812 Colusa 3 mi s Stonyford Comment
  JEPS80198  Nemacladus capillaris L. R. Heckard and J. C. Hickman 1980-7-3 5352 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake county boundary); Snow Mt. 1548 Comment
  UC1585893  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 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); Stony Creek 1500 Comment
  UCD82741  Nemacladus montanus Craig Thomsen; G. Harrington 2009-5-14 2922 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  UCD160063  Nemophila James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  UCD82389  Nemophila Craig Thomsen; G. Harrington 2009-5-12 2831 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  CAS-BOT-BC361305  Nemophila heterophylla Richard R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles NW of its junction with State Hwy 20, west of Williams. 157 Comment
  SEINET5585803  Nemophila heterophylla Richard R. Halse 2013-1 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UC595049  Nemophila heterophylla Annetta Carter 1938-5-8 1384 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC606895  Nemophila heterophylla L. Constance 1938-4-22 2146 Colusa Lower Lake-Williams Rd 4 mi e Lake-Colusa LIne (on Cache Creek near Wilbur Springs); Inner North Coast Ranges, Cache Creek nr Wilbur Springs 365 Comment
  RSA589947  Nemophila heterophylla Michael A. Vincent, Robert M. Rhode 1996-3-30 7272 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
  JEPS2989  Nemophila menziesii Alice King May, 1908 Colusa College City Comment
  UCD120236  Nemophila menziesii Gene R. Williams 1961-3-29 32 Colusa South of Bear Valley; 3 miles north of junction of State Highways 16 and 20. Comment
  JEPS80381  Nemophila pedunculata L. R. Heckard and J. Hickman 1981-6-22 5614 Colusa along Dark Hollow Creek (Big Meadow, Snow Mt.); Snow Mt., , Big Meadow 1889 Comment
  UC595048  Nemophila pedunculata Annetta Carter 1938-5-8 1381 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  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
  UCD163210  Nemophila pedunculata Craig D. Thomsen 2000-3-31 2103 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  RSA730238  Nicotiana glauca Richard R. Halse 2007-3-25 7123 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. (WGS84) 100 Comment
  UCR206398  Nicotiana glauca George K. Helmkamp, E. A. Helmkamp 2009-3-11 14379 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 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
  JEPS127817  Orobanche bulbosa Susan Fawcett 2014-5-13 226 Colusa Walker Ridge, near border of Lake and Colusa Counties. Comment
  CAS-BOT-BC7016  Orobanche grayana var. jepsonii Harley Pierce Chandler 1905-10-1 s.n. Colusa Princeton Comment
  SEINET4854289  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton. Comment
  SEINET5766934  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton Comment
  JEPS81407  Orobanche pinorum L. R. Heckard and J. C. Hickman 1982-7-9 6014 Colusa Colusa-Lake County Boundary: Near junction of Horse Glade along road to Lookout, Goat Mt. Comment
  POM286327  Orthocarpus erianthus Lyman D. Benson 1935-3-27 6339 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  RSA402037A  Orthocarpus lithospermoides Jens Clausen 1935-5-20 1018 Colusa Ca. 27 mi W of Williams after having passed the Wilbur Springs road. Along Bear Creek. Comment
  SEINET12270141  Orthocarpus lithospermoides var. bicolor A. Carter, Kellogg, L. 1953-1 3239 Colusa road to Leesville, 6 mi N of Wilbur Springs Junction 400 Comment
  UCD34848  Oryza sativa Beecher Crampton 1963-9-9 6894 Colusa 1/4 mile E of Cortena. Comment
  SEINET519285  Osmorhiza berteroi L. P. Janeway 1998-3-7 5710 Colusa Along Pacific Ridge Rd. (16N06) 0.5 mi E of road to Spanish Ridge and Hough Springs. 1052 Comment
  UC1299450  Packera clevelandii Freed W. Hoffman 1947-6-19 1672 Colusa Cooks Springs North Coast Ranges Comment
  UCD134746  Packera clevelandii A. M. Shapiro 1994-6-12 s.n. Colusa along Goat Mountain Road, between Sullivan Creek and Summit Lookout. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  SFV12205  Packera eurycephala var. eurycephala J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, open valley floor, 8.6 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 Comment
  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
  UC1299444  Packera greenei Freed W. Hoffman 1947-6-19 1670 Colusa Cooks Springs, w Colusa County North Coast Ranges 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
  CHSC112746  Panicum capillare Lowell Ahart 2013-10-1 19100 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles (air) northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  RSA0118628  Panicum capillare Lowell A. Ahart 2013-10-1 19100 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
  UCD32923  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa Colusa County, 1 mile south of Sycamore. Comment
  CHSC70988  Papaver rhoeas Vernon Oswald; Lowell Ahart 1998-5-7 8990 Colusa Sites-Lodoga Rd. just west of Grapevine Pass and County Rd. 401 to Elk Creek: Chaparral. 481 Comment
  UCD88625  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCR115039  Parnassia californica G. Fred Hrusa 1994-11-7 11993 Colusa Banks of Little Stony Creek, c. 2.5 mi above Stonyford-Lodoga Rd. on Goat Mtn Road. 440 Comment
  CAS-BOT-BC259722  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Colusa - Williams Road at the trough Comment
  CHSC94712  Paspalum distichum Lowell Ahart 2006-9-26 13352 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  RSA724980  Paspalum distichum L. Ahart 2006-9-26 13352 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UCD88913  Paspalum distichum C. F. Dunshee 1942-1 2 Colusa Rice fields. Comment
  UC596227  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  UC71653  Pectocarya penicillata Miss Alice King 1905-1 Colusa College City Comment
  CHSC77918  Pectocarya pusilla Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  JEPS87668  Pectocarya pusilla Vernon H. Oswald and Lowell Ahart 1994-4-6 6071 Colusa s. Stonyford (Goat Mtn. Road 0.8 mi s. of Sullivan Creek Bridge, sw of Digger Pine Flat) 487 Comment
  UCD165931  Pedicularis densiflora Ellen Dean; with Tom Starbuck 2016-4-24 8842 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). 398 Comment
  UCD56679  Pedicularis densiflora Jack Alderson 2007-3-25 15 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 574 Comment
  UCD83683  Pedicularis densiflora John Rosenthal; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. East slope of Walker Ridge. Eaton Springs area. 716 Comment
  UCD161828  Pediomelum californicum James A. Neilson Jr. 1980-6-15 3426 Colusa Wilbur Hot Springs. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UCD66581  Pediomelum californicum Craig D. Thomsen 2001-5-24 2526 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  HSC44460  Pellaea mucronata R. York 1978-4-22 130 Colusa Bear Valley Rd. 1.5 mi. from its jct. with Hwy. 20 412 Comment
  UCD70232  Pellaea mucronata D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 350 Comment
  UCR206380  Penstemon heterophyllus subsp. purdyi George K. Helmkamp, E. A. Helmkamp 2009-5-20 14756 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  JEPS104395  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 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
  NY601787  Penstemon heterophyllus var. purdyi J. R. Maze 1971-4-14 955 Colusa About 2 miles south of pass just beyond Leesville on Stonyford - Williams road Comment
  UC76098  Penstemon heterophyllus var. purdyi Miss M. Alice King 1905-1 Colusa near College City (hills beyond Arbuckle); Sacramento Valley, near College City, Arbuckle Comment
  JEPS94162  Pentachaeta exilis Vernon Oswald and Lowell Ahart 1998-4-21 8947 Colusa bordering Goat Mt. Rd. 0.2 mi. s.w. of Stonyford-Lodoga Rd. 390 Comment
  JEPS75733  Perideridia kelloggii L. R. Heckard 1974-9-9 3875 Colusa Just northeasts of rocky promontory southeast of Foutch Camp; Snow Mts. 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
  RSA0118884  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC61435  Persicaria punctata Vernon H. Oswald 1993-8-16 5807 Colusa Sacramento National Wildlife Refuge located ca. 7 mi S of Willows, W1/4 of Tract 44, near the S boundary of the refuge. Growing in shallow water on the N edge of Hunters Creek. 24 Comment
  CHSC94459  Persicaria punctata Lowell Ahart 2006-8-9 13133 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 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
  UCD72534  Petrorhagia dubia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3825 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
  POM65807  Phacelia ciliata Roxana S. Ferris 1917-4-12 536 Colusa 4 miles east of Williams. Comment
  UC1299143  Phacelia corymbosa Freed W. Hoffman 1947-6-19 1615 Colusa Cook Springs Cook Springs (w Colusa Co.) Comment
  CAS-BOT-BC278171  Phacelia distans Mona Bourell 1997-3-29 5807 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  HSC35373  Phacelia distans Robert M. Specht 1975-5-4 169 Colusa 1/2 mi. NE of Fouts Springs along Stoney Creek 488 Comment
  JEPS2352  Phacelia divaricata W. I. Follette 1935-3-31 25 Colusa Tahoe-Ukiah hwy 19.3 mi sw Williams (2.3 mi e of the Colusa-Lake Co. line. on or near Bear Creek, 3 1/2 mi se of Wilbur Spr.) Comment
  JEPS73508  Phacelia egena L. R. Heckard 1972-7-10 3125 Colusa overlooking and 3 mi nw Fouts Springs (near promontory on se corner of mt.); Snow Mt. 1828 Comment
  RSA133612  Phacelia egena L. R. Heckard, C. Ritchie Bell 1951-6-14 176 Colusa Near Stonyford. Comment
  UCD66688  Phacelia imbricata Craig D. Thomsen 2000-5-11 2317 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
  UCD66695  Phacelia imbricata Craig D. Thomsen 2000-6-23 2381 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
  CHSC79517  Phacelia imbricata subsp. imbricata B. Castro; L. P. Janeway 2000-5-2 1109 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  JEPS2143  Phacelia imbricata subsp. imbricata W. L. Jepson 1932-5-8 16296 Colusa n Stonyford (w Colusa Co.) 365 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
  UC1228287  Phacelia imbricata subsp. imbricata L. R. Heckard and C. R. Bell 1951-6-13 175 Colusa at base of cliff just n Stonyford Comment
  RSA428207  Phacelia tanacetifolia Rick Lundquist 1979-4-14 25 Colusa Bear Valley Road, 3.9 miles north of State Route 20. 412 Comment
  UC765521  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  HSC45512  Phacelia tanacetifolia M. Alcasas 1978-4-22 48 Colusa Bear Valley Rd., 2.3 mi. from Hwy. 20 419 Comment
  POM289798  Phacelia tanacetifolia Lyman Benson 1935-3-27 6338 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CHSC107954  Phalaris aquatica B. Castro; T. Boullion 2011-4-20 1832 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 800 ft east of Tehama-Colusa Canal. Ca 0.25 mi NW of large +- saline/alkaline wetland/marsh, just south of tilled grain field. 52 Comment
  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
  CHSC57170  Phlox gracilis R. W. McNulty 1983-4-9 1 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi se of Williams. 321 Comment
  SEINET7096814  Phlox gracilis A. G. Vestal 1985-4-5 s.n. Colusa Along Route 16 about .2 mile south of Route 20 and near Bear Creek. NAD27, 39? deg. 00'36ao , -122?_ 21'22ao (converted to WGS84 decimal degrees). Comment
  UC1051738  Phlox gracilis Helen K. Sharsmith 1953-6-20 4293 Colusa Goat Mountain summit, Lake-Colusa boundary Inner North Coast Ranges, Mendocino National Forest 1864 Comment
  JEPS21852  Phoradendron densum John R. Swanson 1958-4-26 323 Colusa 2.8 mi. w. Bear Valley rd. (near Colusa-Lake Co. boundary, on rd. to Bartlett Springs) 670 Comment
  UCD82633  Phragmites australis Jack Alderson 2009-9-19 29 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near headwaters of Craig Creek. 518 Comment
  CHSC85956  Phyla nodiflora var. nodiflora Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CDA5824  Physalis lancifolia Cowley Jul 1931 Colusa West of Colusa. 0 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
  UCD83751  Pinus attenuata Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5948 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  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
  CHSC29710  Plagiobothrys bracteatus K. R. Stern 1980-6-1 6636 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  SBBG126070  Plagiobothrys canescens G. K. Helmkamp with E. A. Helmkamp 2009-5-20 14750 Colusa St Hwy 16 at "Cowboy Camp" 1.0 mi S of jct with St Hwy 20, adjacent to Bear Crk 332 Comment
  UCD120813  Plagiobothrys canescens Alpaslun Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Comment
  UCD15421  Plagiobothrys collinus var. californicus Margit Sands 1985-4-13 23 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  CHSC81232  Plagiobothrys greenei Jenny Marr; Heidi West, Caroline Warren 1998-4-16 Colusa Vicinity of Grapevine Creek and Antelope Valley. 134 Comment
  UCD56900  Plagiobothrys greenei Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3503 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD66939  Plagiobothrys greenei Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5088 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCD120840  Plagiobothrys humistratus Robert E. Preston 1995-6-2 868 Colusa Bear Valley Road. Comment
  JEPS81273  Plagiobothrys nothofulvus L. R. Heckard and J. C. Hickman 1982-7-5 5883 Colusa s side Snow Mt.; , Summit Springs 1500 Comment
  SEINET3152906  Plagiobothrys nothofulvus M. A. King 1905-4-7 D Colusa College city Comment
  UCD120895  Plagiobothrys nothofulvus David V. Glover 1960-4-14 50 Colusa Cache Creek, State Highway 16, 10 miles north of Rumsey. Comment
  CHSC89895  Plagiobothrys shastensis B. Castro; L. P. Janeway 2001-4-19 1233 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. At upper edge of corridor along perennial N-S-trending creek. 292 Comment
  CDA32833  Plagiobothrys stipitatus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC107976  Plagiobothrys stipitatus var. micranthus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1857 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  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
  HSC48203  Plagiobothrys stipitatus var. micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3953 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS123890  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-28 20115 Colusa About 5 1/2 miles east of Maxwell. Comment
  POM63664  Plagiobothrys stipitatus var. micranthus Roxana S. Ferris 1917-4-12 534 Colusa 4 miles east of Williams. Comment
  SD27804  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2123 Colusa 3.0 miles south of Arbuckle. 42 Comment
  UCD63008  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4661 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  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
  CHSC94420  Plantago coronopus Lowell Ahart 2006-8-9 13154 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1584634  Plantago coronopus Dean W. Taylor 1988-3-24 9460 Colusa ca 0.5 mi n Ware Road (on Ohm Road); Sacramento Valley, Colusa National Wildlife Refuge 24 Comment
  CHSC107956  Plantago elongata B. Castro; T. Boullion 2011-4-20 1839 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  JEPS20847  Plantago elongata B. Crampton 1953-4-29 1147 Colusa about 3 mi e Maxwell Comment
  SEINET3873282  Plantago elongata Richard R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street.; 0 25 Comment
  UC102743  Plantago elongata T. S. Brandegee Apr 1889 Colusa Colusa Junction Comment
  CDA41952  Plantago erecta G. F. Hrusa 1990-4-8 7670 Colusa North Coast Biodiversity Arena; Bartlett Springs road immediately W of Bear Valley to Walker Ridge. Comment
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. Comment
  RSA424754  Plantago erecta Aaron Liston, M. Blumler 1987-4-26 668 -3 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UCD163669  Plantago erecta Craig Thomsen 1999-4-15 1969 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD57337  Plantago erecta Diane Hickson 2007-3-25 3 Colusa BLM Payne Ranch. Destanella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 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
  UCD82366  Plantago erecta Robin McMaster 1973-4-15 336 Colusa Bear Valley. 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
  CHSC19695  Platystemon californicus L. A. Wright Jr. 1971-3-27 16 Colusa W side of Hwy 20, ca. 1 mi nw of junc of Hwy 16 and 20. 243 Comment
  CHSC59768  Platystemon californicus Alvin G. Cary 1975-4-20 3 Colusa Field on west side of road. Bear Valley Road, 9.6 miles north of State Highway 20. Comment
  SD8259  Platystemon californicus Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC91597  Platystemon californicus K. Brandegee 1889-4-1 s.n. Colusa Unspecified. Comment
  HSC72768  Platystemon californicus J. Krajanowski 1981-4-4 3 Colusa .3 mi. W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 18 mi. SW of Williams 322 Comment
  SD147978  Platystemon californicus L. Coats 1983-4-24 15 Colusa Along Bear Valley Road, 4.3 miles south of Bartlett Springs Road; next to a cattle pastuere along the roadside. Comment
  UCD82340  Platystemon californicus Robin McMaster 1973-4-15 326 Colusa Bear Valley. Comment
  UCD96037  Platystemon californicus Charles Gasser 1978-4-9 11 Colusa Bear Valley, 8 miles north of the junction of Highway 16 and Highway 20. Comment
  UCD57101  Plectritis ciliosa Gordon Harrington; Diana Hickson 2007-4-7 0017 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCD82392  Plectritis ciliosa Craig Thomsen; G. Harrington 2009-5-12 2835 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  CDA34081  Plectritis ciliosa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC62948  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald; Lowell Ahart 1994-4-6 6066 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS87663  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  CDA13785  Plectritis macrocera G. F. Hrusa, K. van Katwyk 1995-4-22 12138 A Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 mi. N of Hwy 20, flowers near white. Comment
  JEPS16087  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  UC1053421  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UC999820  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 698 Colusa near Williams Comment
  UC999822  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 696 Colusa south central Colusa County Comment
  UC1543197  Poa Donald G. Nelson et. al. 1940-6-8 687 Colusa e summit of Snow Mt 1981 Comment
  UCD63007  Poa annua Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4660 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  JEPS124236  Poa bulbosa Lowell Ahart 2015-4-1 19991 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
  UCD160062  Poa bulbosa James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  UCD56898  Poa bulbosa Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3501 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD97127  Poa bulbosa Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6911 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  UCD82444  Poa howellii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5661 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UCD82624  Poa pratensis Craig Thomsen; G. Harrington 2009-5-12 2894 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD84517  Poa pratensis Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6068 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  JEPS120977  Poa secunda Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18643 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD163705  Poa secunda Craig Thomsen 1999-5-10 2017 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  CAS-BOT-BC236333  Poa secunda subsp. secunda Roxana S. Ferris 1917-4-14 575 Colusa Arbuckle - Rumsey Road. Foothills W of Arbuckle Comment
  CHSC32216  Poa secunda subsp. secunda James Jokerst 1980-8-6 1057 Colusa North Coast Ranges. Near Snow Mountain. Comment
  CHSC33326  Poa secunda subsp. secunda P. Reynolds 1980-4-12 15 Colusa Ca. 0.3 mi. w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 mi. sw of Williams. 321 Comment
  UCD81247  Poa secunda subsp. secunda Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5411 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  POM62478  Pogogyne douglasii Roxana Stinchfield 1916-7-11 448 Colusa Colusa - Williams Road at Trough Comment
  UC883695  Pogogyne douglasii A. A. Heller 1916-6-9 12387 Colusa Coast Range about 2 miles west of Leesville Comment
  CHSC107975  Pogogyne zizyphoroides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1858 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  JEPS127600  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa N side of Maxwell road, ca 2 miles W of Sites and 5.8 miles E of summit of Maxwell Grade. Comment
  SEINET3375126 Image available Polygala cornuta var. cornuta Marcus E. Jones 1882-7-3 3316 Colusa Colfax Comment
  CDA22742  Polygonum amphibium var. emersum P. Steinbaugh, Goodwin 1932-10-1 Colusa Near Grand Island. 0 Comment
  CHSC84938  Polygonum aviculare Lowell Ahart 2003-10-23 10657 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CAS-BOT-BC413965  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-6-17 292 Colusa Near College City Comment
  CDA2777  Polygonum persicaria L. Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 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
  CHSC107308  Polypogon australis L. P. Janeway; B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  UCD67067  Polypogon maritimus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5095 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
  UCR228273  Polypogon maritimus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5065 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  JEPS75871  Polystichum imbricans subsp. imbricans L. R. Heckard 1974-9-9 3857 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt. 1828 Comment
  HSC86897  Populus fremontii subsp. fremontii Anthony J. Desch, Bryon Cariss 1988-4-17 36 Colusa Goat Mountain Rd. 7 mi. W from its junction with Stonyford Rd. Comment
  UCR225261  Potamogeton diversifolius Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5107 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UCD39221  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E of Cortena. Comment
  UCD67086  Potamogeton pusillus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5108 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  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
  RSA0013900  Proboscidea louisianica J. C. Roos 1948-9-2 4024 Colusa West of Williams. 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
  JEPS27877  Proboscidea lutea Richard Snow 1958-8-3 671 Colusa on road to Leesville near Highway 20 Comment
  JEPS80440  Prunella vulgaris var. lanceolata L. R. Heckard and J. Hickman 1980-7-3 5369 Colusa sw slope Snow Mt. (about Summit Springs); sw slope Snow Mt., Summit Springs 1554 Comment
  UCD67100  Prunus emarginata Ellen Dean; Davis Botanical Society 2008-5-31 5027 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  CAS-BOT-BC151201  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga Comment
  UCD84572  Prunus virginiana var. demissa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6097 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Goad, between Cold spring and Buck Flat. 971 Comment
  CHSC115394  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  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
  UCD135314  Psilocarphus tenellus George F. Hrusa 1989-5-7 6087 Colusa slopes on north side above Little Stony Creek approximately 4 meters from intersection of Ceder Mountain Road and Stonyford-Lodoga Road. 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
  CHSC79550  Pterostegia drymarioides B. Castro; L. P. Janeway 2000-5-2 1120 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  HSC45682  Pterostegia drymarioides Sheila Logan 1978-4-22 63 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD163707  Puccinellia simplex Craig Thomsen 1999-5-10 2019 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD92227  Puccinellia simplex Beecher Crampton 1958-5-19 4824 Colusa Colusa County, 3 miles south of Maxwell, along U.S. Highway 99W. 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
  CAS-BOT-BC462851  Pyrola asarifolia F. P. Cronemiller 1924-6-26 893 Colusa Upper Lotto Meadow 1371 Comment
  JEPS80783  Pyrola dentata L. R. Heckard and J. C. Hickman 1981-7-30 5756 Colusa Trout Creek, southeast side of Snow Mountain 1600 Comment
  UCD81221  Quercus berberidifolia Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5558 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges and canyons south of Destanella Flat. 467 Comment
  UCD83754  Quercus chrysolepis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5951 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  UC993118  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993119  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993120  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UCD57708  Quercus douglasii Daniel Chau; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern 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
  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
  HSC71306  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4620 Colusa Along Stony Creek below Digger Pine Campground Comment
  CDA16104  Quercus garryana var. garryana G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15249 Colusa North Coast Ranges; Goat Mtn. 1706 Comment
  UCD46857  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa Butte Sink, along Butte Creek, ca. 3 miles northeast of Colusa. Comment
  RSA623529  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  RSA798652  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  SFV17752  Quercus palmeri J. M. Tucker 1991-8-19 4496 B Colusa Across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs along a north-facing canyon slope. 427 Comment
  UCD14526  Quercus palmeri Roger Raiche 1990-12-2 C Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD84512  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6063 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CHSC33068  Rafinesquia californica Thomas Nelson; Jane Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  CHSC45699  Rafinesquia californica Vernon Oswald 1986-5-12 2004 Colusa Sites-Lodoga Rd. 0.2 mi w of Grapevine Pass. Roadside. 487 Comment
  HSC48162  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 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
  UCR212367  Ranunculus arvensis Craig D. Thomsen 2000-5-12 2324 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
  SEINET11587858  Ranunculus canus Unknown 2009-3-11 14373 Colusa Williams Comment
  UCR47929  Ranunculus canus Dave Read 1975-4-20 08 Colusa Inner Coastal Ranges. Bear Valley Road, 8.7 miles north of intersection with State Highway 20 412 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
  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
  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
  SEINET12091630  Ranunculus hebecarpus C. L. Eddy 1984-1 3 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15 143 Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  SEINET255530  Raphanus raphanistrum Richard R. Halse 2007-3-22 7105 Colusa Williams; by the junction of 5th Street and B Street. 25 Comment
  UCR206694  Raphanus raphanistrum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14364 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCR201547  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14265 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  UCR257577  Raphanus sativus George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22509 Colusa Sacramento Valley, along CA-20 at Sycamore Cutoff, 1.3 miles west of the Sacramento River crossing 20 Comment
  JEPS75868  Rhamnus californica L. R. Heckard 1974-9-10 3880 Colusa East Circle Trail, along spur running se from the w peak, Snow Mt. Snow Mt. 2011 Comment
  JEPS81335  Rhamnus californica subsp. californica L. R. Heckard, and J. C. Hickman 1982-7-6 5949 Colusa s side Snow Mt. (West Peak ridge); , West Peak 2103 Comment
  CHSC39791  Rhamnus ilicifolia Eloise Gallatin 1935-5-12 Colusa Above Stonyford. 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
  CHSC75745  Rhamnus tomentella subsp. crassifolia Vernon H. Oswald; Lowell Ahart 1999-6-22 9785 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. Common shrub on a roadcut and on the rocky bank of Little Stony Creek. 426 Comment
  JEPS95649  Rhamnus tomentella subsp. crassifolia Vernon H. Oswald and L. Ahart 1999-6-22 9785 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
  RSA28824  Rhamnus tomentella subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade 3 miles W of Leesville. 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
  UCD111678  Rhododendron occidentale Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 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
  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
  RSA589945  Rhus trilobata Michael A. Vincent, Robert Rhode 1996-3-30 7274 Colusa Along Highway 16, near mile marker 5\55, 5.55 mi. S jct. Highway 20 Comment
  JEPS80123  Ribes binominatum L. R. Heckard with J. Hickman 1980-7-1 5281 Colusa ca. 10 mi w Stonyford (cirque between West and East Peaks); Snow Mt. 2042 Comment
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 Comment
  UCD97118  Ribes malvaceum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6901 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  CHSC115751  Ribes malvaceum David Isle 2015-6-20 2156 Colusa North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill, 100-200' S of 18N01 in 2012 Mill Fire area chaparral. 10S -0533568E, 4357508N. 439 Comment
  UCD119994  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-12-30 7270 Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property. Top of small canyon. 306 Comment
  UCD97117  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6900 Colusa Along Bear Valley Rd on west and east sides of road. 355 Comment
  CAS-BOT-BC293684  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest. Dixie Glade Campground 918 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
  CAS-BOT-BC362902  Rigiopappus leptocladus James Jokerst 1985-4-4 2202 Colusa Near Rail Canyon Comment
  CHSC27584  Rigiopappus leptocladus Timothy Spira; Robert Schlising 1978-5-13 3238 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC85967  Rigiopappus leptocladus Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  HSC62787  Rigiopappus leptocladus J. M. DiTomaso 1979-4-14 876 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  UC903228  Rigiopappus leptocladus Ethel Crum 1932-5-8 1452 Colusa Stonyford Inner North Coast Ranges 426 Comment
  UCD163224  Rigiopappus leptocladus Craig D. Thomsen 2000-3-31 2116 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCR261656  Rigiopappus leptocladus Ann Howald 2003-4-24 2324 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, west side of Little Stony Creek, near service road 356 Comment
  JEPS80179  Rigiopappus leptocladus L. R. Heckard with J. Hickman 1980-7-3 5331 Colusa just w Summit Springs (sw <side of?> mt., ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  JEPS104207  Rosa californica Lowell Ahart 2003-10-23 10677 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
  UCR201553  Rosa californica George K. Helmkamp, E. A. Helmkamp 2008-10-14 14262 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UC1051706  Rosa gymnocarpa Helen K. Sharsmith 1953-7-1 4405 Colusa near Old Mill Camp; Inner North Coast Ranges, Mendocino National Forest, Trough 1036 Comment
  JEPS80824  Rubus parviflorus L. R. Heckard and J. C. Hickman 1981-7-31 5794 Colusa e side Snow Mt.; e side Snow Mt., Dark Hollow Creek 1584 Comment
  CAS-BOT-BC158728  Rubus ursinus Roxana Stinchfield 1916-7-8 381 Colusa Sycamore Slough, Stinchfield Ranch Comment
  POM163497  Rubus vitifolius Roxana S. Ferris 1926-4-21 6310 Colusa Sycamore Slough/ Near Sycamore. Comment
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  JEPS81280  Rumex crispus L. R. Heckard and J. C. Hickman 1982-7-5 5891 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  CAS-BOT-BC433469  Rumex dentatus Roxana S. Ferris 1926-4-21 6285 Colusa 3 miles west of Colusa Comment
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD61437  Rumex pulcher Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3882 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
  UCD81731  Rumex salicifolius Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5733 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  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
  SBBG115378  Sagittaria latifolia J. McCaskill, Mr. Harvey, L. Davis 1954-8-9 365 Colusa Butte Crk, ca. 4 mi E of Colusa, on E side of Sacramento River Comment
  UC1178889  Sagittaria latifolia Herbert L. Mason 1945-9-19 12714 Colusa 1 mi n Colusa (on e side, below causeway, marshy bank of the Sacramento River); marshy bank of the Sacramento River Comment
  UC1178890  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa 1 mi n Colusa (on e side, Marshy bank of the Sacramento River); bank of the Sacramento River Comment
  CAS-BOT-BC445795  Sagittaria montevidensis Milo S. Baker 1946-9-5 11632 Colusa Along Hiwy. between Colusa and Williams 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
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CHSC78975  Salicornia subterminalis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9979 Colusa Colusa National Wildlife Refuge. On the west side of Powell Slough 0.25 mi south-southwest of Refuge Headquarters. 15 Comment
  CHSC78977  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9976 Colusa Sacremento National Wildlife Refuge. 18 Comment
  CHSC62849  Salix breweri Vernon H. Oswald; Lowell Ahart 1994-3-23 6016 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section of the E side of Frenzel Creek, S of Stonyford. 518 Comment
  UC1356325  Salix breweri Theodore J. Crovello 1965-4-26 686 Colusa along Bartlett Springs Rd. 2.5 mi w junction with Bear Valley Road Comment
  UCD163852  Salix breweri Craig D. Thomsen 2000-6-7 2368 a Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC77371  Salix exigua Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Sites and Sites-Ladoga Road. 109 Comment
  UC1179058  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13159 Colusa ca. 3 mi n.e. Colusa (Butte Sink, along Butte Creek) Comment
  UC1179059  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13157 Colusa ca. 3 mi n.e. Colusa (along Butte Creek, Butte Sink) Comment
  UC1786437  Salix exigua var. hindsiana Edward L. Smith 1965-4-16 659 Colusa One mile east of Colusa. Comment
  CHSC77954  Salix laevigata Beth Hendrickson; B. Castro, L. P. Janeway, Mary Ann Griggs 1999-4-12 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 97 Comment
  UCD111126  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa 2.5 miles NW of Sites at base of Little Antelope Grade. 200 Comment
  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
  UCD61464  Salix laevigata Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3910 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  CDA12801  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Serpentine Flora of California; Little Stony Creek. Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. Comment
  JEPS80250  Salix lasiolepis L. R. Heckard and J. Hickman 1980-9-15 5429 Colusa slopes below Summit Springs; Snow Mt., <Lake-Colusa Co. boundary> 1524 Comment
  UCD111628  Salix lasiolepis G. F. Hrusa 1996-2-26 12633 Colusa On margin of Little Stony Creek approx. 2 m. beyond intersection of Goat Mtn. Rd. and Stonyford-Lodoga Rd. 475 Comment
  UCD111629  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Little Stony Creek, Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. 475 Comment
  UCD163850  Salix lasiolepis Craig D. Thomsen 2000-6-7 2367 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC101023  Salix lasiolepis var. lasiolepis John Dittes; Josephine Guardino 2008-3-14 1515 Colusa Great Central Valley; Sacramento Valley; butween Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air mile south of Gridley Road, ca. 1.1 air mile west of Drumheller Slough. 17 Comment
  CHSC27518  Salvia columbariae Michael F. Henetz 1978-4-15 16 Colusa Ca. 65 m n of Salt Creek, ca 15 m n of Hwy. 20, ca. 17.7 km wsw of Williams. 143 Comment
  CHSC27525  Salvia columbariae Greg C. Halcomb 1978-4-9 10 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC45671  Salvia columbariae Stephen Plant 1978-4-22 206 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  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
  HSC87083  Salvia columbariae L. Blackford, S. Branch, D. Malm 1988-4-16 48 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  UCLA70201  Salvia columbariae Robert F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  JEPS80782  Sambucus mexicana L. R. Heckard and J. C. Hickman 1981-7-30 5755 Colusa Trout Creek Snow Mt. (se side of mt.) 1600 Comment
  UCD57658  Sambucus nigra subsp. caerulea Hildegarde Durkin; 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. North side of Thompson creek. Along trail above Thompson Creek 362 Comment
  HSC39240  Sanicula bipinnatifida J. P. Smith, Thomas W. Nelson 1976-4-14 8577 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UC106104  Sanicula bipinnatifida T. Brandegee March 1889 Colusa Leesville Comment
  UCD57664  Sanicula crassicaulis Erica A. Smith; 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. Along unimproved road, where road crosses Craig Creek. 313 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
  SEINET13945258 Image available Sanicula tuberosa J. L. Hobson 1974-1 58 Colusa 0.75 mi. from the junction to Indian Valley on Walker Ridge Rd. Elev. 2800', Wilbur Springs Quad. T14N R6W SEC12 853 Comment
  HSC45685  Scandix pecten-veneris Patricia Shesgreen 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD163882  Scandix pecten-veneris Craig D. Thomsen 2002-4-10 2591 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
  UCR206666  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-17 14390 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  UCD163662  Schoenoplectus acutus var. occidentalis Craig Thomsen 1998-6-10 1960 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC83435  Schoenoplectus americanus Bill Maslach 2001-6-6 13 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; about 50 m downstream of bridge marked '1930.' On creek bank and in creek. 175 Comment
Read comments
Jul 20 2006
  CHSC46320  Schoenoplectus pungens Vernon Oswald 1989-6-3 3795 Colusa Little Stony Creek at the mouth of Frenzl Creek, ca. 6 mi s of Stonyford, north edge of Frenzel Creek Research Natural Area, Mendocino National Forest. 426 Comment
  UCD72473  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3807 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  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
  CDA2621  Scirpus glaucus M. R. Pryor 1947-5-1 Colusa Grimes (col. near Biggs) 0 Comment
  UC1100924  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12964 Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UCD83760  Scribneria bolanderi Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5956 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  CHSC86868  Scrophularia californica B. Castro 2003-4-10 1420 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Cutbank of dirt road. 131 Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS75726  Scutellaria californica L. R. Heckard 1974-9-9 3861 Colusa along trail about 1/3 mi e of Foutch Camp (along Trout Creek); Snow Mountain, Trout Creek 1828 Comment
  JEPS80261  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-15 5441 Colusa n of road at Summit Springs; Snow Mountain, Summit Springs 1524 Comment
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  JEPS62862  Scutellaria tuberosa Alice King May 1906 Colusa College City Comment
  UCD66959  Scutellaria tuberosa Ellen Dean; Davis Botanical Society 2008-5-31 5003 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1152 Comment
  CHSC94415  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110106  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  SEINET3876301 Image available Sequoia sempervirens James H. Smith 1976-1 s.n. Colusa Williams.; 0 Comment
  CAS-BOT-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  CHSC94402  Setaria viridis Lowell Ahart 2006-8-9 13137 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94470  Setaria viridis Lowell Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD92837  Setaria viridis Beecher Crampton 1958-6-26 4974 Colusa along Grieve Road, 5.5 miles south of College City. Comment
  UCD81249  Sherardia arvensis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5413 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located south of Brophy Canyon. 375 Comment
  CHSC112276  Sidalcea diploscypha Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18647 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
  HSC87050  Sidalcea diploscypha L. Blackford, S. Branch, D. Malm 1988-4-16 67 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  SFV17852  Sidalcea diploscypha J. M. Tucker 1980-5-3 4443 Colusa Bear Valley. 4.3 miles south of junction of Brim Road and Bear Valley Road. 396 Comment
  UC1733754  Sidalcea diploscypha Kay H. Beach 1940-5-16 657 Colusa Colusa and Lake county line Comment
  UCD116629  Sidalcea diploscypha Clinton C. Shock 1980-5-3 63 Colusa Bear Valley west side, about 12 miles northwest of State Highway 20 near State Highway 16. 390 Comment
  UCD57851  Sidalcea diploscypha Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 41 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  UCD57860  Sidalcea diploscypha Gordon Harrington 2007-4-17 28 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  CHSC45331  Sidalcea keckii Vernon Oswald 1984-5-2 1164 Colusa Along the access road on the e side of East Park Res. 0.3 mi n of Site-Lodoga Rd. 365 Comment
  CHSC79771  Sidalcea keckii L. P. Janeway; B. Castro 2000-5-3 6700 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 396 Comment
Read comments
Mar 15 2011
  JEPS117021  Sidalcea keckii David Gowen 2008-5-24 921 Colusa Stoneyford Ladoga Rd., ca. 1.6 miles south of Stoneyford. Growing on road shoulder on east side of road. Comment
  UC584175  Sidalcea keckii J. Clausen 1935-5-20 1013 Colusa on Bartlett Springs road 18 mi w Williams; w of Williams Comment
  JEPS75730  Sidalcea oregana subsp. hydrophila L. R. Heckard 1974-9-9 3868 Colusa just ne of rocky promontory se Foutch Camp; Snow Mt., se of Foutch Camp 1798 Comment
  JEPS75834  Silene californica L. R. Heckard 1974-9-11 3950 Colusa on Foutch Camp--Box Spring trail just w Trout Creek crossing (Snow Mt.); , w of Trout Creek crossing on Foutch Camp-Box Sprin 1828 Comment
  RSA477841  Silene californica D. A. Young 1969-5-4 P- 377 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  HSC45722  Silene gallica M. Alcasas 1978-4-22 38 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA0060081  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles west northwest of its junction with State Hwy. 20. 378 Comment
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
Read comments
Aug 11 2014
  SEINET8879658  Silene laciniata subsp. californica R. R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road, ca 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  CAS-BOT-BC388981  Silene laciniata subsp. californica Roxana S. Ferris 1926-4-23 6444 Colusa Near top of Grapevine Grade on Stonyford-Setco Road Comment
  CAS-BOT-BC389256  Silene lemmonii Volney Rattan 1884-6-1 s.n. Colusa Summit above Fouts Sp. Coast Mts. North of San Francisco Bay Comment
  SD22372  Silybum marianum Richard Neil 1938-6-20 Colusa Grimes Comment
  UCD72467  Sinapis arvensis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3801 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
  SEINET11094167  Sinapis arvensis Unknown 2010-3-20 7826 Colusa Flora of California, USA. Colusa Co., California. Along State Hwy. 20 ca. 5.4 miles west of Colusa (Junction of State Hwys. 20 & 45) elev. 17 m. 39.19004d N 122.10456d W WGS84 Habitat: Weedy roadside ditch. Flowers bright yellow; plants to 1.2 meters tall. 17 Comment
  UCD63623  Sisymbrium altissimum Craig D. Thomsen 2008-3-21 2720 Colusa BLM Payne Ranch. 0.25 mile south of intersection of Hwy 16 and Hwy 20. Between Bear Creek and Hwy 16. Comment
  JEPS124249  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  CHSC58404  Sisyrinchium bellum Clinton C. Shock 1980-5-3 58 Colusa Bear Valley, ca. 12 miles northwest of Highway 20. 384 Comment
  UCD138841  Sisyrinchium bellum Clinton C. Schock 1980-5-3 58 Colusa Bear Valley, around 12 miles northwest of Highway 20. 384 Comment
  JEPS120808  Solanum americanum Lowell Ahart 2013-10-1 19082 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
  POM62090  Solanum americanum Roxana Stinchfield 1916-7-7 385 Colusa Sycamore Slough bed. Stinchfield Ranch. Comment
  CDA6240  Solanum pseudocapsicum M. H. Handley 1961-7-24 Colusa 0 Comment
  CHSC45991  Solanum rostratum Lowell Ahart 1980-6-11 2370 Colusa Along the edge of the River Road, where the road dips and floods during high water, about 9 1/2 miles north of Colusa. 30 Comment
  CAS-BOT-BC157050  Solanum umbelliferum R. S. Ferris 1917-4-14 590 Colusa Along Sand Creek, Arbuckle - Rumsey Road Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  UCD55462  Solidago velutina subsp. californica Ellen Dean; Gordon Harrington 2006-10-6 3286 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  UCD82441  Solidago velutina subsp. californica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5668 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  CAS-BOT-BC236519  Sorghum bicolor J. H. Thomas 1960-8-29 8845 Colusa About 5.3 miles east of Lake-Colusa County line along Highway 20 between Clearlake and Williams Comment
  CAS-BOT-BC236520  Sorghum bicolor Mary L. Bowerman 1940-1-1 3836 Colusa Wall Point Trail, Mount Diablo Comment
  CAS-BOT-BC235306  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  UC1100454  Sorghum halepense Herbert L. Mason 1945-9-10 12723 Colusa 1 mi. n. Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Sacramento R. Comment
  UCD92752  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  CAS-BOT-BC390102  Spergularia bocconi Roxana Stinchfield 1916-6-15 274 Colusa College City Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  CHSC29847  Spergularia macrotheca var. leucantha K. R. Stern 1980-6-30 6658 Colusa Vernal pool area, south border Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC390761  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 640 Colusa 3 3/4 mi. south of Maxwell Comment
  CAS-BOT-BC390765  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 636 Colusa 2 mi. so. of Maxwell Comment
  POM253415  Spergularia salina var. tenuis G. B. Rossbach, Ruth P. Rossbach 1938-5-31 636 Colusa 2 miles S of Maxwell. Comment
  POM62479  Stachys ajugoides Roxana Stinchfield 1916-7-11 427 Colusa Davis Tule, near Sycamore Slough. Comment
  CHSC94482  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13118 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC112627  Stachys albens Lowell Ahart 2013-10-1 19079 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC88559  Stachys albens L. P. Janeway 2001-6-6 7116 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  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
  UCD164144  Stachys albens Craig Thomsen 1997-6-21 1933 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  UCD55468  Stachys albens Ellen Dean; Gordon Harrington 2006-10-6 3288 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  RSA0109095  Stachys pycnantha L. Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  CHSC62885  Stellaria media Vernon H. Oswald 1994-3-14 5991 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, between Cell 1, Tract 38 and Tract 41. Along the side of a levee road. 25 Comment
  UCD64273  Stellaria media Craig D. Thomsen 2000-3-31 2074 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD164038  Stellaria nitens Amber Flores 2016-4-9 4 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. On lower slopes of hill just south of corral at 16 and 20. 343 Comment
  CDA15548  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa North Coast Ranges; Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  CHSC79695  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner Coast Ranges. Along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  JEPS106184  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2004-10-4 11424 Colusa On the 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 369 Comment
  UCD111679  Streptanthus Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  UCD167943  Streptanthus James Neilson 1982-7-1 4091 a Colusa Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UCD167948  Streptanthus James Neilson 1982-7-1 4088 Colusa near mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UCD23461  Streptanthus batrachopus A. M. Shapiro 1988-6-6 s.n. Colusa Goat Mountain Road. 762 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
  CAS-BOT-BC61233  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  CAS-BOT-BC61237  Streptanthus breweri Roger Raiche 1985-5-25 50460 Colusa Walker Ridge, Brim Road, near intersection West Walker Road. 637 Comment
  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
  UC1051693  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-18 4256 Colusa Candy Bucket Spring Inner North Coast Ranges, Mendocino National Forest (road from Stoneyford to Mill Spring) 609 Comment
  UC1552822  Streptanthus breweri var. breweri Frederica Bowcutt 1985-5-10 510 Colusa road bank along Bear Valley Rd about 3 mi se Wilbur Springs (1 mi w of Hwy 20); Wilbur Springs 15' Quad Comment
  UC956511  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-19 1021 Colusa Cook Springs Comment
  UC956620  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 2289 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 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
  HSC72152  Streptanthus glandulosus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9565 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  RSA293147  Streptanthus glandulosus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  HSC87332  Streptanthus glandulosus Gail B. Phillips 1982-3-27 4 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  CHSC71110  Streptanthus glandulosus subsp. glandulosus Jan Monelo 1989-4-1 4 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  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
  UC764910  Streptanthus glandulosus subsp. glandulosus R. F. Hoover 1938-4-24 3227 Colusa ridge between Venado and Leesville Comment
  UC764981  Streptanthus glandulosus subsp. glandulosus R. F. Hoover 1938-4-23 3205 Colusa grade on Rumsey-Arbuckle road Comment
  UCR141627  Styrax officinalis var. californicus Roman Gankin 1959-4-19 330 Colusa Along road to Walker Ridge from Bear Valley Comment
  CDA39700  Styrax officinalis var. redivivus T. C. Fuller 1958-5-27 3666 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  CAS-BOT-BC48091  Styrax redivivus A. A. Heller 1919-5-10 13111 Colusa Grade west of Leesville 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
  UCD163844  Styrax redivivus Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD18702  Styrax redivivus Roman Gankin 1959-4-19 330 Colusa along road to Walker Ridge from Bear Valley. Comment
  UC71764  Symphyotrichum spathulatum H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD136692  Symphyotrichum subulatum var. parviflorum P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  UCD81233  Taeniatherum caput-medusae Ellen Dean; K. Mawdsley, B. Rice 2009-5-6 5570 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
  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
  JEPS45773  Tamarix parviflora W. L. Jepson 1920-5-24 9030 Colusa Sulphur Creek Wilbur Springs (sw Colusa Co) 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
  UCD71258  Tetrapteron graciliflorum James I. MOSBY 1984-4-21 6 Colusa Bear Valley, 10 miles north on Bear Valley Road; on moist clay soil; not very abundent. 426 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
  CAS-BOT-BC399735  Thalictrum polycarpum A. F. Hough 1924-6-22 1 Colusa McDaniel Ranger Station 914 Comment
  UC1552719  Thelypodium brachycarpum Frederica Bowcutt 1985-6-19 597 Colusa just sw Bear Valley (ridge about 2 air mi nw of Wilbur Hot Springs); Wilbur Springs Quad. (15') 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
  UCR206353  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2009-3-11 14375 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  CAS-BOT-BC88159  Thysanocarpus curvipes Roxana S. Ferris 1917-4-14 553 Colusa 7 miles west of Arbuckle. Comment
  HSC31600  Thysanocarpus curvipes Thomas E. Higley 1974-5-5 85 Colusa 0.5 mi. S of N Fork Campground 412 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
  UCD56905  Thysanocarpus curvipes subsp. curvipes Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3508 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD64265  Thysanocarpus curvipes subsp. curvipes Craig D. Thomsen 2000-3-31 2061 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC62927  Thysanocarpus curvipes var. curvipes Vernon H. Oswald; Lowell Ahart 1994-4-6 6064 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On the slopes bordering Sullivan Creek. 469 Comment
  CHSC57362  Thysanocarpus laciniatus Steven Triano 1987-4-4 18 Colusa Salt Canyon, n side of Salt Creek, ca. 30 ft s of Hwy 20, 11 mi wsw of Williams. 143 Comment