Search Results — 2000 specimen records retrieved (1616 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  IRVC29682  Abies magnifica var. shastensis Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5036 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  CHSC80223  Abutilon theophrasti B. Castro; G. Kuenster 2000-7-19 1200 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal, at edge of a levee road along an un-named drainage through agricultural land. 42 Comment
  CAS-BOT-BC334176  Acer negundo var. californicum Roxana S. Ferris 1926-4-22 6301 Colusa near Sycamore Comment
  CHSC100410  Acer negundo var. californicum John Dittes; Josephine Guardino 2008-3-14 1511 Colusa Great Central Valley; Sacramento Valley; between Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air-miles south of Gridley Road, ca. 1.1 air-miles west of Drumheller Slough. 17 Comment
  CAS-BOT-BC334174  Acer negundo var. californicum Alice Eastwood 1921-4-11 10245 Colusa Colusa Comment
  UCR205146  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14252 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SEINET223541 Image available Achnatherum lemmonii L. R. Heckard 1972-7-10 3135 Colusa West of Trout Creek Snow Mt. 1829 Comment
  CHSC81215  Achyrachaena mollis Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  POM52917  Achyrachaena mollis Roxana S. Ferris 1917-4-12 s.n. Colusa 4 miles east of Williams. Comment
  UC75911  Achyrachaena mollis Miss M. Alice King 1905-1-1 Colusa near College City; Sacramento Valley Comment
  UC88433  Achyrachaena mollis Brandegee 1900-1 Colusa Colusa Junction Comment
  UCD56907  Achyrachaena mollis Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3510 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 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
  SEINET3245652  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2008-1 14242 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County line (Meridian 7.5') 9 Comment
  CAS-BOT-BC479712  Acmispon brachycarpus Ann Howald 2003-6-9 2367 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3 mi N of Lodoga, N of Last Chance camping area 378 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
  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
  UCR261746  Acmispon brachycarpus Ann Howald 2003-6-9 2362 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  CHSC101628  Acmispon denticulatus David W. Isle; Teal Richards 2002-4-18 1653 Colusa Mendocino National Forest; N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg Study Plot. MDB and M. 524 Comment
  UCD66677  Acmispon denticulatus Craig D. Thomsen 2000-5-11 2290 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD104192  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road (about 6 1/2 air miles southeast of Stonyford). 1127 Comment
  UCR261743  Acmispon rubriflorus Ann Howald 2003-6-9 2365 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, at Sleepy Hollow camping area 378 Comment
  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
  HSC72174  Acmispon wrangelianus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9551 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  HSC98295  Acmispon wrangelianus D. R. Junell 1965-4-18 25 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  UCD104559  Acmispon wrangelianus W. Williams 1951-1 s.n. Colusa Yolo County border. Hwy 16, Bear Creek Valley. Comment
  JEPS75833  Aconitum columbianum L. R. Heckard 1974-9-11 3943 Colusa s.e. Foutch Camp (just e. of large rocky outcroppings, Snow Mt.); Snow Mt. 1859 Comment
  CAS-BOT-BC107  Adenostegia palmata Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-6-17 284 Colusa near College City Comment
  UC217393  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains n. of town and e. of R.R. Hershey Comment
  UC71996  Adenostoma fasciculatum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC112264  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa Inner North Coast Range. On the south side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS121107  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa On thesouth side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS118669  Aegilops triuncialis L. P. Janeway, B. Castro 2011-5-19 10290 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  CDA4024  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4025  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4026  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4028  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  SFV15097  Aeschynomene rudis B. J. McCaskill, G. D. Barbe (4397) 1990-9-5 s. n. Colusa West side of Boggs Road between Dodge and Fonseca Roads. MDB&M. Comment
  UCD104591  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  HSC66736  Aesculus californica J. P. Smith, J. O. Sawyer 1973-4-30 6365 Colusa Along Hwy. 20, 10.1 mi. W of Hwy. 5 at Williams Comment
  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
  UC2014168  Agoseris grandiflora Ellen Dean, G. Harrington, C. Thomsen, Chiao-Yi Cheng, R. Wilmarth 2009-5-20 5643 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
  UCD66705  Agoseris grandiflora Craig D. Thomsen 2001-4-12 2490 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UC2014169  Agoseris heterophylla Ellen Dean, G. Harrington, K. Mawdsley 2007-3-30 3500 Colusa Colusa County: BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. Comment
  UCD57283  Agoseris heterophylla Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3651 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
  UCD64516  Agoseris heterophylla Craig D. Thomsen 2000-4-12 2102 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
  UCD66857  Agoseris heterophylla Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5060 -a Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Destanella Flat. Serpentine meadow on the east side of main drainage. 554 Comment
  UCSC010468  Agoseris heterophylla var. cryptopleura Dylan M. Neubauer, Tim Forsell 2016-3-31 595 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  JEPS35661  Agoseris heterophylla var. cryptopleura W. L. Jepson 1932-5-7 16266 Colusa Indian Valley, north of Leesville. 518 Comment
  JEPS75880  Agrostis alba L. R. Heckard 1974-9-9 3851 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  JEPS80432  Agrostis alba L. R. Heckard 1974-9-9 3870 Colusa meadowy area around spring and small stream rocky promontory southeast of Foutch Camp; Snow Mt. 1798 Comment
  JEPS80446  Agrostis alba L. R. Heckard and J. Hickman 1980-9-15 5426 Colusa w Summit Springs (upper margin of moist seep on slope); Snow Mt. 1554 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
  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
  JEPS110433  Agrostis exarata Lowell Ahart 2006-8-9 13167 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS80443  Agrostis exarata L. R. Heckard and J. C. Hickman 1980-9-15 5420 Colusa w of Summit Springs; Snow Mt. 1554 Comment
  JEPS73446  Agrostis variabilis L. R. Heckard 1972-7-8 3043 Colusa on ridge running se West Peak, Snow Mt. (on n side) 2011 Comment
  CHSC94474  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCR227338  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.25 mi west of Hwy 20/16 intersection, near Colusa Co. milepost 3.0 310 Comment
  SEINET3917542  Aira caryophyllea Donald Spalinger 1974-5-4 47 Colusa St. John Mt. quad. North fork Campground on Stony Creek. 1600.; 0 Comment
  UC985656  Alisma plantago-aquatica Malcolm A. Nobs and S. Galen Smith 1949-9-9 1873 Colusa 3 mi w Williams Comment
  UCR200661  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch, c. 0.25 mi. south of intersection between Hwy 16 and Hwy 20, near confluence of Hamilton Flat and Jackson Canyon drainages, c. 10 meters east of Bear Creek, west of Hwy 16 Comment
  UCD138469  Allium amplectens K. Esau 1934-5-5 s.n. Colusa Ukiah Tahoe Highway, west of Williams. 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
  UCD82159  Allium amplectens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5689 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UCD82390  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2832 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  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
  UCR261630  Allium amplectens Ann Howald 2003-3-26 2291 A Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  UCR44923  Allium amplectens L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CAS-BOT-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford Comment
  CHSC115627  Allium amplectens David Isle; Terril Wolt 2015-4-8 2146 Colusa Northe Coast Range: N of Fouts Springs; just N of the S fork Stony Creek. W of FS Gate to Bathhouse (Welton Glade) Trailhead ~200-300 ft.. In drainage ditch on S edge rd. (Fouts Springs California: 10S -0529687E, 4356519N). Comment
  UCD141846  Allium amplectens L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa 7.8 miles north of Leesville toward Lodoga. Comment
  UCD141843  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  CHSC14088  Allium falcifolium L. V. Ritter 1969-4-30 239 Colusa Ca. 100 yds. W of the junction of Highway 20 and 16, Ca 50 yds. N of Highway 20. Comment
  JEPS15563  Allium falcifolium G. Thomas Robbins with L. R. Heckard 1956-7-25 3717 Colusa slope above Dark Hollow Creek (a tributary of Middle Fork Stony Creek) (on s flank of Snow Mt. at lower end of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. 1981 Comment
  JEPS73488  Allium falcifolium L. R. Heckard 1972-7-9 3100 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2011 Comment
  UCD141802  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville, near head of Bear Valley, off road. 304 Comment
  UCD141834  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  UCD141854  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  CAS-BOT-BC135887  Allium fimbriatum subsp. purdyi Peter H. Raven 1962-5-31 17908 Colusa State Highway 20, 2.5 miles east of Lake County line. 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-BC135890  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
  HSC48164  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  HSC48465  Allium fimbriatum var. purdyi J. P. Smith 1978-4-22 9744 Colusa Bear Valley Rd., 1.2 mi. from its junction with Hwy. 20 412 Comment
  JEPS120995  Allium fimbriatum var. purdyi Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  UC726499  Allium fimbriatum var. purdyi A. A. Heller 1942-5-29 16484 Colusa 1/2 mi e Lake 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
  UCD141786  Allium fimbriatum var. purdyi L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa Bear Valley Road (beyond sign to Wilbur Springs) past fenced area on right after leaving junction of California 16 and 20. Comment
  UCD163228  Allium fimbriatum var. purdyi Craig D. Thomsen 2001-5-24 2511 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
  UCD164168  Allium fimbriatum var. purdyi Craig Thomsen 2008-5-31 2761 Colusa Payne Ranch (Bear Creek Ranch) BLM. About 1 mile south of Hwy 20 junction, vicinity of Cowboy Camp. Comment
  UCD57822  Allium fimbriatum var. purdyi Gordon Harrington 2007-4-17 33 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  RSA31856  Allium fimbriatum var. purdyi A. A. Heller 1937-06 s.n. Colusa Lake Landing 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
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  HSC66002  Allium serra Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 53 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  UC630432  Allium serra Annetta Carter 1938-5-7 1373 Colusa 4 mi n Rumsey; Inner North Coast Range, Comanche Hills 243 Comment
  CAS-BOT-BC475544  Allium serra Roxana S. Ferris 1926-4-23 6429 Colusa Summit of grade on Williams-Stonyford Road Comment
  CAS-BOT-BC475546  Allium serra A. A. Heller 1919-5-10 13112 Colusa Grade east of Leesville in the oak belt on open grassy slopes. Comment
  SEINET3879172  Allium serra D. W. McNeal, David Isle 1991-5-22 3821 Colusa On a steep road bank above Hwy #162, 4.3 mi E of the Stony Creek Bridge N of Elk Creek.; 0 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
  UCD141823  Allium serra L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa 1/2 mile east of Sites toward Maxwell. 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
  UCD141826  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
  HSC45664  Allophyllum gilioides Sheila Logan 1978-4-22 84 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72148  Allophyllum gilioides J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9561 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD84444  Allophyllum gilioides Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6052 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  UCD118016  Allophyllum gilioides Glen Holstein 1978-4-15 s.n. Colusa Along Bear Valley Road near Trout Creek bridge, Bear Valley. 402 Comment
  CHSC88518  Allophyllum gilioides subsp. violaceum B. Castro 2003-5-15 1438 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On steep SE-facing slope in opening above dirt rd paralleling a S-trending canyon. 195 Comment
  RSA783325  Allophyllum gilioides subsp. violaceum R. R. Halse 2010-3-25 7849 Colusa Along State Hwy 20 ca. 10.7 miles SW of its junction with Interstate Hwy 5 at Williams. In Salt Canyon. 154 Comment
  SEINET14407744  Allophyllum gilioides subsp. violaceum R. R. Halse 2010-3-25 7849 Colusa Along State Hwy 20 in Salt Canyon, ca 10.7 miles SW of its junction with I-5 at Williams. 154 Comment
  JEPS80786  Alnus incana subsp. tenuifolia L. R. Heckard and J. C. Hickman 1981-7-30 5759 Colusa s.e. side Snow Mt. (Trout Creek); , Trout Creek 1584 Comment
  JEPS80819  Alnus incana subsp. tenuifolia L. R. Heckard and J. C. Hickman 1981-7-31 5790 Colusa Dark Hollow Creek Snow Mt. (e side of mt.) 1584 Comment
  UCD163841  Alnus rhombifolia Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC71667  Alopecurus saccatus Michael A. Wolder 1998-5-12 Colusa Sacramento National Wildlife Refuge Complex. Colusa National Wildlife Refuge south west of Colusa. 16 Comment
  JEPS120702  Amaranthus californicus Lowell Ahart 2013-10-1 19089 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  JEPS108783  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
  JEPS80058  Amelanchier utahensis L. R. Heckard with J. Hickman 1979-6-15 5058 Colusa n of West Peak, Snow Mt. (along e trail from Frog Camp to Saddle, Snow Mt); Snow Mt. 2072 Comment
  SBBG50561  Amelanchier utahensis B. Hutmacher 1973-4-21 10 Colusa St Hwy 20, Bear Valley near Bear River 1524 Comment
  RSA78613  Ammannia coccinea J. T. Howell 1944-7-18 19837 Colusa 3 miles west of Williams. 30 Comment
  CHSC29712  Ammannia robusta K. R. Stern 1980-6-30 6650 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  POM287422  Amsinckia intermedia Lyman Benson 1935-3-27 6331 Colusa 6 miles west of Williams. 213 Comment
  UCD82372  Amsinckia intermedia Robin McMaster 1973-4-15 346 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  CHSC86529  Amsinckia lunaris B. Castro 2003-3-18 1384 a Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 Comment
  UC1093626  Amsinckia lunaris Francia Chisaki, Gene B. Newcomb 1958-4-1 1097 Colusa on road to Lodoga (0.7 mi nw of junction with Hwy 20) Comment
  UCD63027  Amsinckia lunaris Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4679 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 526 Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  CHSC60660  Amsinckia lycopsoides Vernon H. Oswald 1993-4-14 5267 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. Along the edge of the levee road along the S leg of the tour route. 18 Comment
  CHSC86528  Amsinckia lycopsoides B. Castro 2003-3-18 1386 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 265 Comment
  POM287399  Amsinckia lycopsoides Lyman Benson 1935-3-27 6343 Colusa Williams. 61 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
  UC76158  Amsinckia lycopsoides Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD160032  Amsinckia lycopsoides Ellen Dean; Craig Thomsen 2015-4-21 8628 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Area to the SE of Lynch Canyon on S side of undeveloped road and N of creek. Near western end of Thompson Canyon. 381 Comment
  UCD163216  Amsinckia menziesii Craig D. Thomsen 2000-4-28 2193 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
  CHSC112258  Ancistrocarphus filagineus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18626 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC72168  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9543 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UC1056275  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (just w of base of grade to Indian Valley (Bartlett Mtn. Rd.)) Bear Valley; Inner North Coast Ranges Comment
  UCD163684  Ancistrocarphus filagineus Craig Thomsen 1999-4-15 1985 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD166309  Ancistrocarphus filagineus Jack Major 1962-4-28 805 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 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
  CHSC89861  Androsace elongata subsp. acuta B. Castro; L. P. Janeway 2001-4-18 1235 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On low terrace just above riparian corridor paralleling dirt road adja-ent to perennial N-S-trending creek. 274 Comment
  JEPS91078  Androsace elongata subsp. acuta Dean W. Taylor 1992-4-16 12401 Colusa hillsides 0.4 mi due w from spillway into Little Stony Creek (Inner North Coast Ranges, East Park Reservoir); Inner North Coast Ranges, East Park Reservoir 411 Comment
  CDA16107  Angelica tomentosa G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15246 Colusa North Coast Ranges; Little Stony Creek, approx. 1.5 mi. NE of Stonyford-Lodoga Rd. intersection. Sheet 1 of 2 350 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
  CAS-BOT-BC27017  Antirrhinum subcordatum Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N. of San Francisco Bay. Stony Cr. 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
  JEPS108810  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
  POM99734  Antirrhinum subcordatum Volney Rattan 1884-06 s.n. Colusa Stony Creek Comment
  JEPS127573  Antirrhinum virga David Isle 2015-6-20 2155 Colusa North Coast Ranges: ~3.75 miles W of Stonyford and ~100 yards S of road 18N01; S of Bob Angulo mobile hone; on E edge of old 4x4 road/firebreak in chaparral. (Gilmore Peak 7.5' Quad.) Comment
  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
  CHSC79441  Apocynum cannabinum B. Castro; L. P. Janeway 2000-5-1 1105 a Colusa Vicinity of Sites, Pence Mtn, and Grapevine Creek. 335 Comment
  CHSC86964  Apocynum cannabinum B. Castro; Michelle Cedarborg 2003-5-1 1426 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. By creek not far downstream of pond at creek headwaters 204 Comment
  JEPS81276  Apocynum cannabinum L. R. Heckard and J. C. Hickman 1982-7-5 5886 Colusa Summit Springs s. side of Snow Mt. (slope below (s. of) area); , Summit Springs 1500 Comment
  POM129769  Apocynum cannabinum Roxana Stinchfield 1916-7-8 s.n. Colusa Stinchfield Ranch, along Sycamore Slough 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
  JEPS75709  Aralia californica Alice Q. Howard 1972-7-10 13 Colusa Paradise Creek at crossing of trail between Fouts Camp and Box Springs; Snow Mt. 1371 Comment
  UCD63730  Arceuthobium campylopodum Craig D. Thomsen 2008-5-23 2739 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.75 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 520 Comment
  SEINET3239841  Arceuthobium occidentale R. L. Mathiasen 2009-1 2009 -21 Colusa 3.2 km E of Summit County line at vista point on St. Rte. 20. 400 Comment
  CHSC83138  Arctostaphylos G. L. Webster 1989-5-6 7700 Colusa Near border with Lake Co., on crest of Walker Ridge, near Cold Springs Mt. Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  UCD66956  Arctostaphylos canescens subsp. sonomensis Ellen Dean; Davis Botanical Society 2008-5-31 5000 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 822 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
  CDA12247  Arctostaphylos manzanita G. F. Hrusa 1989-2-7 5807 Colusa Inner North Coast Ranges; Road to Cedar Mtn, along Little Stony Creek approx. 3 miles above junction with Stonyford-Lodoga Rd. Comment
  CAS-BOT-BC24378  Arctostaphylos manzanita subsp. manzanita Richard A. DeMartile 1982-10-10 s.n. Colusa Road between Ladoga and Goat Mountain Lookout. 914 Comment
  UCR206665  Arctostaphylos manzanita subsp. manzanita George K. Helmkamp, E. A. Helmkamp 2009-3-17 14395 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  HSC72176  Arctostaphylos viscida J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9554 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  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
  SBBG118100  Arctostaphylos viscida subsp. pulchella C. Bornstein, E. Collins, R. Lutsko 2004-6-18 Colusa Bartlett Springs Rd, ca. 1.3 mi E of jct with Bear Valley Rd 432 Comment
  UCD56680  Arctostaphylos viscida subsp. pulchella Jack Alderson 2007-3-25 s.n. 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
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  SBBG114895  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Colusa Brim Rd 396 Comment
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Dec 10 2014
  SBBG50847  Arctostaphylos viscida subsp. viscida S. C. Schank 1960-4-10 51 Colusa above Cache Crk, 2 mi NW of jct of Hwy 16 and Hwy 20 on rd to Bear Valley Comment
  JEPS81416  Arenaria congesta var. crassula L. R. Heckard and J. C. Hickman 1982-7-9 6024 Colusa Goat Mt Goat Mt. (just east of Lookout) 1859 Comment
  SBBG29992  Argemone munita L. Constance 1939-5-14 2490 Colusa 1 mi E of Mill Crk Ranger Station 548 Comment
  HSC41876  Argemone munita subsp. rotundata Richard Runyon 1977-4-24 34 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 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
  CAS-BOT-BC400398  Aristolochia californica Roxana Stinchfield 1916-7-8 377 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CHSC100273  Arrhenatherum elatius David Isle 1990-6-6 1519 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Lower Letts Valley in moist meadow. MDMB. 1243 Comment
  CHSC61398  Artemisia douglasiana Vernon H. Oswald 1993-8-16 5809 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, NE corner of Tract 41. 25 Comment
  UCD66528  Arundo donax Craig D. Thomsen 2000-4-28 2229 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 2.80. Along Bear Creek at base of Hwy 20 fill-slope, adjacent to massive valley oak. 300 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
  POM129846  Asclepias fascicularis Roxana Stinchfield 1916-7-11 s.n. Colusa Davis Tule, near Sycamore Slough. Comment
  UCD121316  Asclepias fascicularis Roy Y. Berg 1964-6-27 RYB 8179 Colusa Stonyford. Comment
  UC424842  Asclepias solanoana Milo S. Baker 1929-6-30 3472 b Colusa Snow Mt. Trail to Summit Springs (at Cedar Creek); Snow Mt., Cedar Creek Comment
  RSA724830  Aster subulatus var. ligulatus L. Ahart 2006-9-26 13343 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CAS-BOT-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
  SEINET12319578  Asteraceae K. A. Smail 1978-1 s.n. Colusa ca 0.3 mi W of jct Hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  UCD58179  Astragalus clevelandii Gordon Harrington 2007-5-31 69 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  UCD64032  Astragalus clevelandii Craig D. Thomsen 2000-6-23 2411 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
  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
  SEINET7096743  Astragalus gambelianus A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UC71640  Astragalus gambelianus Miss Alice King 1905-1 Colusa College City Comment
  UC83408  Astragalus gambelianus Katharine Brandegee april 1889 Colusa Colusa Junction Comment
  CHSC112270  Astragalus rattanii var. jepsonianus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18634 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  RSA475188  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 701 -1 Colusa 0.45 miles from jct. Hwy 20 on Walker Ridge road. 600 Comment
  RSA475238  Astragalus rattanii var. jepsonianus Aaron Liston, Sara Meury 1988-5-31 751 -1 Colusa Bear Valley; 8.1 miles N of Hwy 20. 400 Comment
  SEINET5586429  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-1 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53 558 Comment
  UC1613418  Astragalus rattanii var. jepsonianus Charles M. Belshaw 1937-4-25 2830 Colusa Cooks Spring, Devils Ridge Inner Coast Range, Cooks Spring, Devils Ridge Comment
  UC2029550  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-3-27 8764 Colusa Along State Highway 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Highway 20 and 53 Comment
  UCD63923  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212305  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-5-11 2291 B 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
  RSA475227  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 699 -1 Colusa 3.3 miles N of Stonyford on Elk Creek Road. 300 Comment
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Aug 8 2014
  SEINET5586423  Athysanus pusillus Richard R. Halse 2013-1 8763 Colusa Along State Hwy. 20 just eat of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53 558 Comment
  UCSC010467  Athysanus pusillus Dylan M. Neubauer, Tim Forsell 2016-3-31 596 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  UCD114250  Athysanus pusillus Kim E. Steiner 1978-4-29 198 Colusa Walker Ridge Rd., 1.5 mi. N of State Hwy 20. 777 Comment
  UCR225263  Atriplex Craig D. Thomsen 2008-4-27 s.n. Colusa BLM Payne Ranch, lands to the southwest of the intersection of Hwys 20 and 16. Southwest of Cowboy Camp on the west side of Bear Creek 366 Comment
  UCR205145  Atriplex argentea George K. Helmkamp, E. A. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  JEPS59412  Atriplex argentea var. mohavensis W. L. Jepson 1924-10-27 10661 Colusa Alkali goose lands near Maxwell; near Maxwell Comment
  UC1609126  Atriplex coronata Vernon H. Oswald, Mike Wolder and Joe Silveira 1993-7-26 5701 Colusa ca 5 mi s Colusa (ca 1 mi n of Ware Rd., ca 1 mi w of Ohm Rd., Tract 18 on the s side of the Colusa National Wildlife Refuge); s side Colusa National Wildlife Refuge, s of Colusa 15 Comment
  CHSC80182  Atriplex depressa B. Castro; G. Kuenster 2000-7-19 1209 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 44 Comment
  JEPS90596  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  JEPS100804  Atriplex persistens Dean W. Taylor 1993-7-9 13853 Colusa 300 m S of Sacramento National Wildlife Refuge headquarters; Sacramento National Wildlife Refuge 30 Comment
  RSA724831  Atriplex prostrata L. Ahart 2006-9-26 13347 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  JEPS90604  Atriplex rosea Dean W. Taylor 1989-8-6 10509 Colusa Delevan National Wildlife Refuge Sacramento Valley (sw margin) Comment
  UC40790  Atriplex semibaccata J. Burtt Davy May 1898 4287 Colusa Maxwell Comment
  UC217003  Atriplex serenana var. serenana H. M. Hall 1920-7-12 11011 Colusa 5 mi e Maxwell; e of Maxwell Comment
  CHSC78973  Atriplex triangularis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9977 Colusa Delevan National Wildlife Refuge. 18 Comment
  CAS-BOT-BC146205  Avena barbata Roxana S. Ferris 1917-4-14 591 Colusa Arbuckle - Rumsey Road. 3 miles west of Arbuckle. Comment
  UCD57056  Avena barbata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3644 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  SEINET10517556  Avena barbata Roxana S. Ferris 1917-4-18 Ferris 691 Colusa Zsni west of Arlrickle in open field. 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
  UCD66443  Avena fatua Craig D. Thomsen 2000-4-28 2212 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCR225656  Avena fatua Craig D. Thomsen 2008-4-27 s.n. Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west northwest of Cowboy Camp on the west side of Bear Creek 452 Comment
  JEPS113773  Azolla filiculoides Lowell Ahart 2007-7-7 14260 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  CAS-BOT-BC98201  Baccharis salicifolia Roxana S. Ferris 1917-4-18 633 Colusa Banks of Sacramento River near Sycamore Slough Comment
  UCD74307  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  UCD82368  Balsamorhiza macrolepis Robin McMaster 1973-4-15 338 Colusa Bartlett Springs. Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  CDA2974  Bassia hyssopifolia Margaret Bellue Oct 1932 Colusa Near Williams. 0 Comment
  UCD38965  Bassia hyssopifolia Beecher Crampton 1961-7-20 5934 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UC1613495  Berberis aquifolium var. dictyota Charles M. Belshaw 1937-4-25 2838 Colusa vicinity of Cook's Spring (Inner North Coast Range, Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  SD131864  Bergia texana Barbara Ertter, Elizabeth Neese, et al. 1989-10-21 8869 Colusa Southeast end of East Park Reservoir north of Lodoga. 365 Comment
  CHSC42573  Berula erecta Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306. 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  CHSC94746  Bidens frondosa Lowell Ahart 2006-9-26 13344 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. Comment
  JEPS80391  Boechera repanda L. R. Heckard, and J. Hickman 1981-6-22 5624 Colusa Dark Hollow trail Snow Mt. 1965 Comment
  UCD140003  Bolboschoenus fluviatilis V. C. Bryant 1929-8-23 s.n. Colusa Colusa. 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
  JEPS102226  Bolboschoenus glaucus L. P. Janeway 2001-6-13 7172 Colusa Sacramento Valley. Along Norman Road 5.0 km east of Hwy 99W and Hwy I-5. 23 Comment
  RSA0046899  Bolboschoenus glaucus Richard Carter 2006-7-31 17122 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45. Comment
  CAS-BOT-BC28201  Bolboschoenus glaucus Maxine Wilkes 1929-8-1 s.n. Colusa Unspecified 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
  UCR206384  Brassica George K. Helmkamp, E. A. Helmkamp 2009-5-20 14752 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCD55472  Brickellia californica Ellen Dean; Gordon Harrington 2006-10-6 3296 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  IRVC29684  Brickellia greenei Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5034 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  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
  SEINET10965888  Brodiaea elegans Katherine L. Morris 1973-6-6 Morris 388 Colusa Chaparral woodland and sparse oaks; on hwy. 20, .3 Miles e of lake county line Comment
  CHSC89838  Brodiaea elegans subsp. elegans B. Castro; L. Janeway 2001-5-10 1248 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge. 396 Comment
  HSC3023  Brodiaea elegans subsp. elegans Annetta Carter 1953-6-20 3240 Colusa Near summit E of Hough Springs on Bartlett Springs Rd. Comment
  HSC45669  Bromus arenarius Stephen Plant 1978-4-22 204 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD57609  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa 5.8 miles south of Lodoga. Comment
  UCD57610  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa 10.1 miles southeast of Leesville. Comment
  SEINET11695837  Bromus arenarius Unknown 1960-5-26 T.O. 2509 Colusa 10.1 mi SE of Leesville, E of Three Sisters, grown at UC Davis agronomy experimental area Comment
  POM92520  Bromus hordeaceus Roxana S. Ferris 1917-04 527 Colusa 4 miles east of Williams. Comment
  SEINET10514562  Bromus hordeaceus Roxana S. Ferris 1917-4-12 Ferris 527 Colusa 4 miles E of Williams. Alkali Plains. Comment
  CHSC100264  Bromus laevipes D. Isle 1988-4-13 1512 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  UCD163860  Bromus laevipes Craig D. Thomsen 2001-5-31 2542 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD58941  Bromus laevipes R. Tofsrud 1948-7-1 s.n. Colusa Colusa Co. Comment
  CHSC112028  Bromus laevipes David Isle; Doug Johnson 1988-5-11 2089 Colusa Mendocino National Forest. Little Stony Road (Goat Mtn Rd). 426 Comment
  UCD81225  Bromus madritensis subsp. madritensis Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5562 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Canyon to the south of Destanella Flat. 446 Comment
  CHSC86613  Bromus madritensis subsp. rubens Jenny Marr; Heidi West, Joyce Lacey, Caroline Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  UCD64500  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-3-31 2084 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
  UCD66445  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-4-28 2214 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD58602  Bromus pseudolaevipes Beecher Crampton 1958-5-19 4814 Colusa Above Little Stony Creek. West of Lodoga. Comment
  SEINET244463 Image available Bromus rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  UCD59764  Bromus tectorum Beecher Crampton 1958-5-19 4808 Colusa West of Lodoga. Comment
  SEINET3923568  Bromus tectorum S. Bowie, J. Lopez; D. Riess 1994-4-23 0172 Colusa Leesville Quadrangle, Walker Ridge (BLM property). Collected along Bear Valley Road in Bear Valley, approx. 2.1 km south of intersection with Brimm Road.; 0 663 Comment
  UCD129653  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3527 Colusa road between Goat Mountain Lookout and Upper Letts Valley (ca. 2.5 miles, airline, north of the lookout), Goat Mountain. 1447 Comment
  CDA42953  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa Inner North Coast Range; On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. Comment
  UCD169351  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CAS-BOT-BC438309  Calandrinia ciliata Roxana S. Ferris 1917-4-12 535 Colusa 4 miles east of Williams Comment
  SEINET7096749  Calandrinia ciliata A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 miles south of Route 20 and near Bear Creek. NAD27, 39? deg. 00' 36ao, -122?_ 21' 22ao (converted to WGS84 decimal degrees) Comment
  UCD64251  Calandrinia ciliata Craig D. Thomsen 2000-3-31 2053 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  SEINET9097491  Calandrinia ciliata var. menziesii R. R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca 10 miles N of Colusa (junction of State Hwys 45 & 20). 22 Comment
  UCD103570  California macrophylla Craig Thomsen 2011-3-28 s.n. Colusa BLM Bear Creek (formerly Payne) Ranch. W of intersection of Hwys 16 and 20; E side of 'Serpentine Creek.' Drainage runs north from Bear Creek Ranch flowing under pull out along Hwy 20. 335 Comment
  UCD57052  California macrophylla Gordon Harrington; Diana Hickson 2007-4-7 0011 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. Comment
  UCD57817  California macrophylla Gordon Harrington 2007-3-22 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. 472 Comment
  HSC48142  Calochortus amabilis Thomas W. Nelson, Jane P. Nelson 1978-4-30 3970 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  JEPS120899  Calochortus amabilis Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18640 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD56677  Calochortus amabilis Jack Alderson 2007-3-25 13 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  CAS-BOT-BC492117  Calochortus amabilis F. P. Cronemiller 1924-5-10 875 Colusa Mill Creek Ranger Station 609 Comment
  CAS-BOT-BC492124  Calochortus amabilis Roxana S. Ferris 1926-4-23 6447 Colusa Grapevine grade between Stonyford and Sites Comment
  UCD63617  Calochortus amabilis Craig D. Thomsen 1999-5-12 2030 Colusa BLM Payne Ranch. Approximately 0.5 mile southwest of intersection of Hwy 16 and Hwy 20. On large knoll. Comment
  UC1733772  Calochortus luteus Kay H. Beach 1940-5-16 659 Colusa Colusa and Lake county line Comment
  CAS-BOT-BC491929  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  CAS-BOT-BC491930  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  CAS-BOT-BC491931  Calochortus luteus J. Clausen 1935-5-20 1012 Colusa 18 miles west of Williams on Bartlett Springs 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
  CHSC28483  Calochortus splendens Timothy Spira; Robert Schlising 1978-5-13 3247 Colusa Ca. 0.5 mi NW jct Hwy 20 and Bear Valley (=Wilber Springs) Road, along latter. Comment
  CHSC79620  Calochortus splendens G. F. Hrusa 1998-6-19 14612 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  JEPS120967  Calochortus splendens Lowell Ahart 2013-5-1 18683 Colusa On the N of the wash and N side of Hwy 20, just E of the Lake County Line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UC1562598  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UCD82156  Calochortus splendens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UC1187346  Calochortus splendens Herbert L. Mason 1961-5-21 15075 Colusa Mouth of Bear Valley Comment
  UC1051690  Calochortus tolmiei Helen K. Sharsmith 1953-6-19 4289 Colusa Old Mill Campground, Trough Springs Ridge Inner North Coast Ranges, Mendocino National Forest 1219 Comment
  CHSC42778  Calochortus uniflorus Deborah Grobman 1975-5-11 13 Colusa 3.6 miles east of Leesville on Leesville Grade. Comment
  RSA296716  Calochortus uniflorus Thomas Wood 1979-4-14 110 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  UC1049544  Calochortus uniflorus Rimo Bacigalupi 1950-4-16 3126 Colusa Bear Creek, along road down middle of Bear Valley, about BM 1326 Bear Valley Comment
  UCD14317  Calochortus uniflorus H. Bebensee 1984-4-21 9 Colusa 9.8 miles north of Highway 20 along the east side of Bear Valley Road. Comment
  UCD83629  Calochortus uniflorus Fanny Ye; with PLB 102 class 2010-5-2 1 Colusa E slope of Walker Ridge. Eaton Springs. On edge of campsite/parking area. 709 Comment
  SEINET3992250  Calochortus uniflorus Rimo Bacigalupi, T. Crovello, L Heckard 1965-4-26 9045 Colusa 4.0 mi south of point at which road takes off westward to Bartlett Springs; Bear Valley Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  CHSC79447  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 Colusa the North Coast Ranges. Small colony on open grassy flat within chaparral/Quercus douglasii woodland. Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. UTM: 10S, 05401N, 43499E 400 Comment
  HSC94037  Calycadenia pauciflora G. Fred Hrusa 1998-6-19 14595 Colusa Along Little Stony Creek, on Goat Mtn. Rd., ~0.5 km W of intersection with Lodoga-Stonyford Rd. 400 Comment
  JEPS120714  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 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
  UC1299279  Calycadenia pauciflora Freed W. Hoffman 1947-6-20 1619 Colusa road from Stonyford to Fouts Springs Paskenta; North Coast Ranges 502 Comment
  UC89057  Calycadenia pauciflora T. S. Brandegee May 1884 Colusa near Mountain House; West Colusa County Comment
  UCD66946  Calycadenia pauciflora Ellen Dean; Davis Botanical Society 2008-5-31 4992 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCR228277  Calycadenia pauciflora Ellen Dean, Davis Botanical Society 2008-5-31 4992 Colusa West of Hwy I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road 383 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
  RSA255514  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6 miles north of Yolo County Line on Hwy. 16 Comment
  RSA255558  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 miles east of Lake County line on Bartlett Springs Road Comment
  RSA255559  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs road on Walker Ridge Road, Buck Flat 869 Comment
  RSA255608  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles west of Lodoga on road to Stoneyford 412 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  SEINET10798196  Calycadenia pauciflora Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 383 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UC1876259  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 mi S of Stoneyford on road to Lodoga. 365 Comment
  UC1876261  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Cr. Trail, 0.5 mi NW of driveway to Fout Spr. Boys Ranch 502 Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UCD129805  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa on road to Trout Creek Trail, 0.5 mile northwest of driveway to Fout Spr. Boy's Ranch. 502 Comment
  UCD129806  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles west of Stoneyford on road to Fout Spr. 609 Comment
  UCD129835  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles north of Highway 20 on Bear Valley Road, Bear Creek. Comment
  UCD163859  Calycanthus occidentalis Craig D. Thomsen 2001-5-31 2539 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD63125  Calycanthus occidentalis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4955 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. 436 Comment
  UCD67591  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa Along Fouts Spring Rd., 2.8 miles W of Stonyford, along roadside. Growing along small stream, soil dry. Large shrub, ca. 10 ft tall, flowers large, reddish. Comment
  UCD126150  Calystegia occidentalis Collector Unknown 1918-1 s.n. Colusa Bear Valley. 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
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  HSC44461  Camissonia contorta R. York 1978-4-22 134 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
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Jul 20 2020
  CDA15476  Camissoniopsis hirtella G. F. Hrusa, WTD 1998-6-19 14613 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC70985  Camissoniopsis hirtella Vernon Oswald; Lowell Ahart 1998-5-7 9004 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
  JEPS85535  Camissoniopsis hirtella L. R. Heckard 1969-5-28 2231 A Colusa near junction of Stonyford-Fouts Spring Rd. and Spring Ridge Rd. (1.5 mi ne of Fouts Spring) 670 Comment
  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
  JEPS121118  Campanula griffinii Lowell Ahart 2013-5-1 18690 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CAS-BOT-BC37028  Capsella bursa-pastoris Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-9 32 Colusa At intersection of Rim Road with Bear Valley Road. 350 Comment
  CDA30193  Cardaria chalepensis D. Isle 2007-4-13 1633 Colusa East of Maxwell ~ 1 mile; south of Maxwell Road and East of Lyons Road in ditch between rice fields east of William Dirk s shop. Comment
  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
  CHSC115615  Carduus pycnocephalus subsp. pycnocephalus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2153 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  CAS-BOT-BC19164  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek. 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
  JEPS110407  Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  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
  CHSC76353  Carex luzulina L. P. Janeway; B. Castro 1999-7-5 6498 Colusa At Bear Wallow Spring; on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. 1045 Comment
  CAS-BOT-BC118347  Carex praegracilis Roxana S. Ferris 1917-4-19 718 Colusa Marshy ground in oak grove, Sacramento River near Sycamore Slough. Comment
  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
  RSA262496  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  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
  CHSC55605  Carex serratodens James Jokerst 1985-4-5 2213 Colusa Near Coyote Peak. 608 Comment
  JEPS81282  Carex serratodens L. R. Heckard and J. C. Hickman 1982-7-5 5893 Colusa s. side Snow Mt. (Summit Springs, slope below (s. of) area); Summit Springs 1500 Comment
  UCD57291  Carex serratodens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3662 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 319 Comment
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82727  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2910 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  HSC36255  Carex serratodens Steven Lagos 1974-5-4 48 Colusa 915 Comment
  JEPS80376  Carex subfusca L. R. Heckard and J. Hickman 1981-6-22 5609 Colusa s side of e ridge of East Peak Snow Mt., East Peak 1950 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
  JEPS80865  Carex subfusca L. R. Heckard and J. C. Hickman 1981-7-30 5771 Colusa along Trout Creek, se side of Snow Mt. Snow Mt., Trout Creek 1600 Comment
  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
  UCR49825  Castilleja L. F. LaPre 1987-6-30 s.n. Colusa Mendocino National Forest, turnout on Stony Creek Road 474 Comment
  UCD23340  Castilleja A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Comment
  CHSC89621  Castilleja affinis subsp. affinis Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  HSC45686  Castilleja applegatei Patricia Shesgreen 1978-4-22 38 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC114942  Castilleja applegatei subsp. martinii Lowell Ahart 2015-4-10 20013 Colusa Road cut, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chapararal. 500 Comment
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
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Mar 2 2015
  CHSC88871  Castilleja applegatei subsp. martinii Christine Hantelman 2000-4-1 46 Colusa At side of Bear Valley Road. 365 Comment
  UCD81237  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5401 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 223 Comment
  UCD97120  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6903 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  JEPS46009  Castilleja applegatei subsp. martinii L. R. Heckard and G. T. Robbins 1957-7-25 814 Colusa just e summit of Snow Mountain (West) (near Colusa-Lake County line); Snow Mountain (West) 2042 Comment
  JEPS81324  Castilleja applegatei subsp. pinetorum L. R. Heckard and J. C. Hickman 1982-7-6 5939 Colusa slope 1/2 mi NE of Summit Springs (E of trail); Snow Mountain, S side 1645 Comment
  HSC47735  Castilleja attenuata Thomas W. Nelson, Jane P. Nelson 1978-4-29 3940 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS124209  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  UCD163675  Castilleja attenuata Craig Thomsen 1999-4-15 1976 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD83624  Castilleja attenuata Adam Clause; with PLB 102 class 2010-5-2 3 Colusa Walker Ridge. Eaton Springs.15 meters north of the main road, on the flat valley floor. 709 Comment
  CHSC27558  Castilleja exserta W. K. Cheechov 1978-4-9 4 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CHSC60153  Castilleja exserta Bryan Case 1988-4-9 129 Colusa Ca. 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca 18 mi se of Williams. 321 Comment
  RSA794941  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2011-4-1 17125 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  HSC65935  Castilleja exserta subsp. exserta C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 45 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  HSC67098  Castilleja exserta subsp. exserta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 42 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  HSC85948  Castilleja exserta subsp. exserta Michalski, Raum, Hopson 1987-4-21 58 Colusa Leesville Rd. Comment
  CHSC82623  Castilleja foliolosa Tara Morgan 2002-4-1 24 Colusa Found on the side of Bear Valley Rd. located northeast of Bear Creek, south of Bear Valley. 350 Comment
  JEPS8775  Castilleja foliolosa Alice King May 1906 Colusa College City 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
  RSA0037133  Castilleja miniata subsp. miniata David W. Isle 2013-8-23 2049 Colusa W bank Salt Ck, ~150'NE of Dennis Dr Bridge on Isle Property. 374 Comment
  UCD163343  Castilleja minor subsp. spiralis Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. 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
  JEPS11156  Castilleja rubicundula subsp. rubicundula W. L. Jepson 1932-5-8 16284 Colusa Stonyford; w Colusa County 365 Comment
  JEPS124233  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2015-4-1 19987 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
  UCD82498  Castilleja rubicundula subsp. rubicundula Craig Thomsen; G. Harrington 2009-5-12 2857 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  SBBG128766  Castilleja rubicundula subsp. rubicundula L. Ahart 2013-5-1 18687 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
  CDA11400  Castilleja tenuis G. F. Hrusa, K. van Katwyk 1995-4-22 12120 Colusa Inner North Coast Ranges; flat on Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  RSA0121887  Caulanthus flavescens Roxana S. Ferris 1926-4-23 6405 Colusa Near Mountain House on the Williams-Stonyford Road. Comment
  UCD114215  Caulanthus flavescens J. M. Tucker 1958-3-7 3364 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  CAS-BOT-BC40505  Caulanthus lasiophyllus Roxana S. Ferris 1926-4-22 6289 Colusa Tule land 3 miles west of Colusa. Comment
  CHSC112311  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC35586  Caulanthus lasiophyllus J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9558 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  JEPS121112  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD21573  Caulanthus lasiophyllus Craig D. Thomsen 2003-5-8 s.n. Colusa En route to Wilbur Hot Springs, approx 1/8 mile west of Bear Valley Rd on Wilbur Springs Rd. Open grassland at base of slope. 396 Comment
  UCD22472  Ceanothus cuneatus Brian Vanden Heuvel 2003-2-20 201 Colusa 6.7 miles west of Stonyford on Fouts Spring Road. Comment
  UCD33934  Ceanothus cuneatus Beecher Crampton 1975-4-21 9165 Colusa Colusa County, 4 miles N.N.E. of Lodoga, grapevine summit. Comment
  JEPS42087  Ceanothus cuneatus var. cuneatus W. L. Jepson 1920-5-23 8964 Colusa near Leesville; SW Colusa Co., Bear Valley Comment
  JEPS82411  Ceanothus integerrimus L. R. Heckard 1969-5-28 Colusa ca 6 air mi w Stonyford (along Soney Creek near Fouts Springs) Comment
  UC2014137  Ceanothus integerrimus Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Along Walker Ridge Road, between Cold Spring and Buck Flat. Comment
  UCD170263  Ceanothus integerrimus D. O. Burge 2016-11-3 2187 Colusa Little Stony Creek watershed, roadside on Goat Mountain Road. 415 Comment
  UCD170330  Ceanothus integerrimus D. O. Burge 2016-11-3 2189 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 860 Comment
  UCD112068  Ceanothus jepsonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. At Stoney Creek. 450 Comment
  UCD56772  Ceanothus jepsonii Sam Bledsoe 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 569 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  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
  HSC96785  Ceanothus jepsonii var. albiflorus J. Carey, A. Hong, J. Leffingwell 1995-5-6 75 Colusa 3.2 mi N on Walker Ridge Rd. from its junction with Indian Valley Access Rd. 854 Comment
  UCD72391  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5117 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  RSA725012  Centaurea solstitialis L. Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  POM53290  Centaurea solstitialis W. R. Mumma 1897-9-3 s.n. Colusa Grand Island Comment
  SEINET11860767  Centaurea solstitialis C. L. Abbott 1926-6-27 s.n. Colusa Colusa Comment
  JEPS80256  Centaurium muehlenbergii L. R. Heckard and J. Hickman 1980-9-15 5434 Colusa n of Summit Springs (n side of road, Lake-Colusa County boundary); Snow Mt. 1539 Comment
  RSA135479  Centaurium trichanthum Volney Rattan 1884-1 s.n. Colusa Stony Creek. Comment
  UCD66949  Centromadia fitchii Ellen Dean; Davis Botanical Society 2008-5-31 4994 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD61474  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3920 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  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
  CHSC107928  Centromadia parryi subsp. rudis B. Castro; Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Towards S end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  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
  CAS-BOT-BC279206  Centromadia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa Comment
  CAS-BOT-BC279211  Centromadia pungens subsp. pungens R. F. Hoover 1936-5-22 1218 Colusa Williams Comment
  CAS-BOT-BC279210  Centromadia pungens subsp. pungens David D. Keck 1933-5-30 2402 Colusa 1.8 miles west of Colusa on road to Williams Comment
  UC195398  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa along the state hwy near Colusa Comment
  UC1299375  Cephalanthera austiniae Freed W. Hoffman 1948-6-27 2525 Colusa 8.6 mi. s.w. Fouts Springs (Upper Letts Valley); w. Colusa Co., Upper Letts Valley 1310 Comment
  SEINET8730526 Image available Cephalanthus occidentalis Unknown 1946-1 7839 Colusa Butte Creek, 1 mile north of Butte Outing Gun Club, near Colusa, Colusa County. 6 Comment
  UCD81246  Cerastium glomeratum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5410 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  UCD137756  Ceratophyllum demersum J. S. Jones 1926-7-16 s.n. Colusa Colusa. Comment
  CAS-BOT-BC293729  Cercis occidentalis Mona Bourell 1997-3-29 5771 Colusa Mendocino National Forest, Dixie Glade Campground 918 Comment
  CDA15468  Cercocarpus betuloides G. F. Hrusa, WTD 1998-6-19 14605 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. Comment
  UCD113027  Cercocarpus betuloides G. F. Hrusa 1996-2-26 12635 Colusa Inner North Coast Ranges. E side of ridge separating Blanchard Valley from Bear Valley, on Leesville Road. 600 Comment
  CAS-BOT-BC136987  Cercocarpus betuloides var. betuloides Roxana S. Ferris 1926-4-23 6419 Colusa Grade beyond Mountain House on Williams - Stonyford Road 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
  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
  JEPS81415  Chaenactis douglasii var. douglasii L. R. Heckard and J. C. Hickman 1982-7-9 6023 Colusa near summit of, Lookout Goat Mt. (Colusa-Lake Counties boundary) Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain Comment
  CDA12016  Chaenactis glabriuscula G. F. Hrusa 1990-4-8 7668 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  CHSC112267  Chaenactis glabriuscula var. heterocarpha Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18650 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
  UC638668  Chaenactis glabriuscula var. heterocarpha Ethel Crum 1938-5-7 2014 Colusa 4.2 mi n of Rumsey; Inner North Coast Ranges, Comanche Hills 254 Comment
  UCD81859  Chaenactis glabriuscula var. heterocarpha Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5743 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
  HSC49867  Chaenactis glabriuscula var. heterocarpha J. P. Smith, J. O. Sawyer 1978-4-29 9778 Colusa Lake/Colusa County Line; Walker Ridge Rd., 4.8 mi. N from the T-intersection to Indian Valley Reservoir Comment
  CHSC113045  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 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
  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
  SBBG28478  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  UC535094  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 564 Colusa about 7 mi n Leesville; Indian Creek 289 Comment
  CHSC62917  Cheilanthes intertexta Vernon H. Oswald; Lowell Ahart 1994-4-6 6061 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS110404  Chenopodium album Lowell Ahart 2006-8-22 13221 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  POM312492  Chenopodium album H. L. Mason, Verne Grant 1946-8-7 12978 Colusa 8 miles north of Colusa; Butte Sink. Comment
  CHSC94515  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCR201556  Chenopodium berlandieri George K. Helmkamp, E. A. Helmkamp 2008-10-14 14272 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  RSA140835  Chenopodium berlandieri var. sinuatum John H. Thomas 1960-8-30 8865 Colusa About 5 miles northwest of College City along road to Sycamore. Comment
  JEPS110092  Chenopodium botrys Lowell Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA35284  Chenopodium botrys Milo S. Baker 1941-7-26 10135 Colusa Stony Creek at bridge north of Stonyford, ca. 1 mile. Comment
  CHSC86515  Chenopodium californicum B. Castro 2003-3-18 1385 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 Comment
  JEPS123892  Chenopodium californicum Lowell Ahart 2015-4-28 20112 Colusa About 300 yards north of the intersection of Bear Valley Road and Brim Road, about 2 miles southwest of Leesville, about 14 1/2 miles (air) west of Williams. Comment
  UCD63033  Chenopodium californicum Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4685 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, opposite Cowboy Canyon. 312 Comment
  HSC66138  Chenopodium californicum C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 47 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 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
  UCD57927  Chloris gayana Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  UCD37706  Chloris virgata Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  CDA39317  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
  SEINET10745049  Chloropyron palmatum R. Stinchfield 1916-6-17 Stinchfield 284 Colusa In alkaline soil, overflowed lands at Tule near College City Comment
  CHSC80410  Chorizanthe membranacea Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 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
  CHSC42575  Cicuta douglasii Vernon Oswald 1986-6-30 2176 Colusa North end of Lily Pond near Letts Lake. 1188 Comment
  SEINET3840083  Cirsium cymosum T. C. Fuller 1958-5-27 3667 Colusa south of highway 20, 1 mile west of the junction with highway 16 Comment
  JEPS81831  Cirsium cymosum var. cymosum L. R. Heckard 1969-5-28 2230 Colusa just below Candy Bucket Springs (on Stoneyford-Fouts Spring road) 670 Comment
  CDA1191  Cirsium douglasii var. breweri G. D. Barbe, Daryl Brown 1982-7-2 3892 Colusa Lower Letts Lake, Mill Valley Campground. Comment
  UCD159335  Cirsium douglasii var. breweri D. S. Park; E. Dean 2010-6-5 119 Colusa Walker ridge, Cold Spring Mt. 886 Comment
  CAS-BOT-BC162597  Clarkia affinis C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-29 35 Colusa Bear Valley Rd., 2 mi. N of Hwy 20 365 Comment
  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
  UC762214  Clarkia affinis R. F. Hoover 1938-4-24 3231 Colusa below Sites; Stone Corral Canyon Comment
  UCD64519  Clarkia affinis Craig D. Thomsen 2000-4-12 2121 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
  UCD72458  Clarkia affinis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3792 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  UCR37605  Clarkia concinna Michelle A. Strull, Et al. 1984-4-28 10 Colusa 6 mi east of Bartlett Springs Road, on Brim Road 488 Comment
  CDA329  Clarkia concinna G. D. Barbe 1982-6-4 3635 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  UCD66685  Clarkia concinna subsp. concinna Craig D. Thomsen 2000-5-11 2312 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-BC164528  Clarkia gracilis subsp. albicaulis Richard A. DeMartile 1983-6-15 107 Colusa Bartlett Springs Road north of Baldy Mountain Comment
  LA45424  Clarkia gracilis subsp. albicaulis G. L. Stebbins Jr.; Malcolm A. Nobs, J. A. Rattenbury 1947-4-27 3755 Colusa 3 mi. W of Leesville, on road to Bartlett Springs Comment
  RSA151824  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa Near Cooks Creek, about 1/4 mile east of Cooks Springs Comment
  UC930771  Clarkia gracilis subsp. albicaulis A. A. Heller 1916-6-6 12354 Colusa on grade about 3 mi w Leesville; Coast Range Comment
  JEPS80137  Clarkia gracilis subsp. gracilis L. R. Heckard with J. Hickman 1980-7-2 5297 Colusa ca. 10 mi w Stonyford (just above Summit Spring entrance to Snow Mt. trail, Colusa-Lake County boundary) 1630 Comment
  JEPS81291  Clarkia gracilis subsp. gracilis L. R. Heckard and J. C. Hickman 1982-7-5 5903 Colusa slope below and s Summit Springs (s side of mountain); Snow Mt. 1500 Comment
  CDA15461  Clarkia gracilis subsp. tracyi G. F. Hrusa, WTD 1998-6-19 14597 Colusa North Coast Ranges; Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. Comment
  UCD104567  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UC903259  Clarkia modesta Ethel Crum 1932-5-7 1462 Colusa Lodoga Inner North Coast Ranges Comment
  UCR261732  Clarkia modesta Ann Howald 2003-5-30 2359 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Hole-in-the-Wall camping area 370 Comment
  RSA0059906  Clarkia modesta Peter H. Raven 1963-5-20 18401 Colusa 9.5 miles east of Houghs Springs (Lake County) Comment
  HSC86833  Clarkia purpurea S. L. Steinwert 1985-4-13 10 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  SEINET8726150 Image available Clarkia purpurea Helen K. Sharsmith 1953-1 s.n. Colusa Above Mill Creek near Fouts Springs, Mendocino National Forest, altitude 2000 feet. 610 Comment
  UCD64423  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2180 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
  CHSC79780  Clarkia rhomboidea G. F. Hrusa 1998-6-19 14604 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~2 km. W of campground. UTM: 10S 05351 N, 43466 E. 490 Comment
  HSC94112  Clarkia rhomboidea G. Fred Hrusa 1998-6-19 14604 Colusa Above Upper Little Stony Creek, Goat Mtn. Rd., about 2 km W of campground 490 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
  SEINET9312817  Claytonia exigua Unknown 1993-5-2 10851 Colusa Frenzel Creek Research Natural Area, Mendocino National Forest Comment
  CAS-BOT-BC439113  Claytonia exigua subsp. exigua James Jokerst 1985-4-5 2207 Colusa Near Coyote Peak. 456 Comment
  CHSC101595  Claytonia exigua subsp. exigua David W. Isle 2002-4-18 1655 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trail (Snow Mtn). N aspect of E drainage; MDB and M. 524 Comment
  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
  CHSC62848  Claytonia exigua subsp. exigua Vernon H. Oswald; Lowell Ahart 1994-3-23 6015 Colusa Frenzel Creek Research Natural Area on the S side of Liitle Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  JEPS95503  Claytonia exigua subsp. exigua Vernon H. Oswald 1994-3-23 6015 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. Occasional populations in serpentine soil of brushy and rocky slopes. 518 Comment
  SEINET199010  Claytonia exigua subsp. exigua H. K. Sharsmith 1953-6-19 4281 Colusa Mendocino National Forest ; Near Trough Springs on Trough Springs Ridge 975 Comment
  UC1745695  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1383 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UCD65633  Claytonia exigua subsp. exigua Craig D. Thomsen 2000-4-12 2136 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS121109  Claytonia exigua subsp. glauca Lowell Ahart 2013-5-1 18677 Colusa On the S side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  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
  UCD82629  Claytonia parviflora Craig Thomsen; G. Harrington 2009-5-12 2901 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  CHSC91018  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. Comment
  HSC45739  Claytonia parviflora subsp. parviflora Sheila Logan 1978-4-22 55 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SEINET199009  Claytonia parviflora subsp. parviflora H. K. Sharsmith 1953-6-19 4285 Colusa Mendocino National Forest ; Near Trough Springs on Trough Springs Ridge 980 Comment
  UC1745696  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1382 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UC638661  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2022 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD56942  Claytonia perfoliata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3544 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 349 Comment
  CAS-BOT-BC440035  Claytonia perfoliata subsp. perfoliata Roxana S. Ferris 1926-4-21 6311 Colusa Sycamore Slough near Sycamore 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
  JEPS121782  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 Reervation Road; in undesignated Section near Colusa Rancheria. Comment
  UC629760  Collinsia bartsiifolia var. bartsiifolia Ethel Crum 1938-5-8 2020 Colusa 3 mi n 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
  CHSC39775  Collinsia grandiflora Brian H. McMurtry 1979-3-31 1 Colusa Ca. 0.3 m w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 m sw of Williams. 321 Comment
  UC1238969  Collinsia greenei Freed W. Hoffman 1948-6-28 2536 Colusa e side Black Diamond Mtn (near Glenn-Colusa county line); North Coast Ranges, Black Diamond Mtn 838 Comment
  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
  UCD57100  Collinsia heterophylla Gordon Harrington; Diana Hickson 2007-4-7 0015 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCD66532  Collinsia heterophylla Craig D. Thomsen 2003-5-30 2257 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
  UCR212362  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS86640  Collinsia rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6682 Colusa sw flank Snow Mtn. (trail from Summit Springs); Colusa-Lake County Line, Snow Mtn. 1590 Comment
  UC204795  Collinsia rattanii Volney Rattan 1884-6-15 Colusa w slope of Black Butte Black Butte 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
  CHSC86513  Collinsia sparsiflora var. collina B. Castro 2003-3-18 1384 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. Ca. 12 ft up from small drainage. 195 Comment
  JEPS81379  Collinsia torreyi var. latifolia L. R. Heckard and J. C. Hickman 1982-7-8 5990 Colusa trail from Saddle between East and West Peaks towards Signal Peak Snow Mt. 2042 Comment
  JEPS81380  Collinsia torreyi var. wrightii L. R. Heckard and J. C. Hickman 1982-7-8 5991 Colusa trail from saddle between E and W Peaks towards Signal Peak, Snow Mt. Snow Mt. 2042 Comment
  CHSC48647  Collomia diversifolia Vernon Oswald 1986-5-12 2011 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. On a roadcut. 487 Comment
  JEPS94201  Collomia diversifolia Vernon Oswald and Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  UC1051697  Collomia diversifolia Helen K. Sharsmith 1953-6-18 4260 Colusa on Letts Valley road above Fouts Springs; Inner North Coast Ranges, Mendocino National Forest 731 Comment
  UCD66683  Collomia diversifolia Craig D. Thomsen 2000-5-11 2310 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD74342  Collomia diversifolia G. Ledyard Stebbins 1968-5-10 6686 Colusa South end of Walker Ridge, north of Hwy 20. Near headwaters of Sulphur Creek. (Note: notebook says date of collection was 10 May. Labels made by Stebbins at CAS say 15 May.) 762 Comment
  CAS-BOT-BC229534  Collomia diversifolia G. L. Stebbins 1968-5-15 6686 Colusa S end of Walker Ridge, N of State Highway 20 762 Comment
  UCD57550  Convolvulus arvensis Andrew Pedersen; 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. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek. 304 Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  JEPS83552  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa w side of Ohm Rd ca 0.5 mi n jct. w/ Ware Rd.; Colusa Nat'l Wildlife Refuge, Arbuckle 7.5' quad. 13 Comment
  UC2042496  Cordylanthus pilosus Holly Forbes and Barbara Keller 2009-7-1 Colusa Walker Ridge Rd about 6.2 mi. N of junction with Highway 20. Comment
  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
  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
  CHSC101073  Cotula coronopifolia David W. Isle 2006-5-12 1628 Colusa In pre-chiseled rice field 4+ miles NE of Maxwell on W Delevan Hunting Club property farmed by W. Dirks and J. Barrett. 30 Comment
  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
  SEINET8194448  Crassula connata R. R. Halse 2010-3-20 7827 Colusa Williams, junction of 5th Street and B Street 25 Comment
  CHSC62886  Crassula tillaea Vernon H. Oswald 1994-3-14 5993 Colusa Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. Sacramento National Wildlife Refuge. 25 Comment
  JEPS86621  Crepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6701 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain); Snow Mountain 1500 Comment
  UC1221796  Crepis intermedia Beecher Crampton 1958-5-19 4803 Colusa 5.5 mi s Lodega Comment
  POM66160  Cressa truxillensis Roxana Stinchfield 1916-7-11 143 Colusa Willaims Road at theTrough Comment
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  RSA747233  Croton setiger George K. Helmkamp, E. A. Helmkamp 2008-10-14 14249 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  CDA34966  Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa Southeast end of East Park Reservoir, north of Lodoga. Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 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
  CHSC94448  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA256295  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1973-5-28 6195 Colusa ca. 3 miles S of Colusa along Hwy. 45. Comment
  SEINET12765117  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford.; 0 347 Comment
  UC1618176  Crypsis schoenoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8827 a Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 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-BC190165  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa Butte Lodge Outing Club, three miles above Colusa. Near Butte Creek. Comment
  POM198510  Crypsis vaginiflora Roxana Stinchfield 1916-7-11 466 Colusa Davis Tule, near Sycamore Slough. Comment
  POM313168  Crypsis vaginiflora H. L. Mason 1945-7-11 12643 Colusa Near Butte creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  RSA268076  Crypsis vaginiflora J. R. Reeder, C. G. Reeder 1972-6-6 5657 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 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
  UCD66867  Crypsis vaginiflora Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5070 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UCD56918  Cryptantha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3521 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  UCD84442  Cryptantha Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6047 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  RSA756835  Cryptantha affinis Barbara Ertter 1989-7-1 8615 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  UCD84551  Cryptantha clevelandii Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6149 Colusa Walker Ridge. Just south of radio tower on Cold Spring Mountain. 945 Comment
  CDA11398  Cryptantha dissita G. F. Hrusa, K. van Katwyk 1995-4-22 12118 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  CHSC79095  Cryptantha flaccida B. Castro; C. Warren 2000-4-3 1048 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 179 Comment
  UC1053453  Cryptantha flaccida Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3168 Colusa 8 mi nw Maxwell (along road to Sites, through first hills on extreme w edge of the Sacramento Valley); Sacramento Valley Comment
  UC1177897  Cryptantha flaccida Peter M. Ray 1950-4-16 1715 Colusa junction of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  UCD82485  Cryptantha flaccida Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5672 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
  UCR44920  Cryptantha hendersonii L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  UC971694  Cryptantha hispidula Leo F. Koch 1940-4-29 936 a Colusa near Colusa and Lake county line (along Highway 20, Williams Highway) Comment
  UCD163229  Cryptantha hispidula Craig D. Thomsen 2000-4-28 2532 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
  UCD82513  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2871 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 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
  UC1212585  Cryptantha intermedia Francia Chisaki and Helen Sharsmith 1959-5-26 1331 Colusa 5 air mi w Stonyford (above Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest Comment
  UCD61451  Cryptantha intermedia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3895 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
  UCD63120  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4950 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  UCD67097  Cryptantha intermedia Ellen Dean; Davis Botanical Society 2008-5-31 5025 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD82532  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5684 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  HSC3610  Cryptantha intermedia var. hendersonii Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  UCD84446  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6054 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  UC1731392  Cryptantha nemaclada Dean W. Taylor 1998-6-16 16661 Colusa Sulphur Creek canyon 0.5 mi below (e) Wilbur Springs (n-facing shale slide); North Coast Ranges, Walker Ridge and vicinity 381 Comment
  UC78650  Cryptantha nemaclada T. S. Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC33124  Cryptantha nemaclada M. K. Curran 1884-1-1 s.n. Colusa unspecified 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
  UCR212290  Cryptantha torreyana Ellen Dean, Davis Botanical Society 2008-5-31 5008 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground 1312 Comment
  CHSC91063  Cupressus macnabiana D. Isle 1996-11-26 190 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. 1.1 mi so. of jct. of Lovelady 4x4 Rd. with portion of 24N02, on east side of 24N02, near Kanaka Glade. 1018 Comment
  CAS-BOT-BC80805  Cupressus sargentii C. Hart Merriam 1907-7-23 s.n. Colusa [Cook] Cooks Springs Comment
  RSA17616  Cupressus sargentii C. B. Wolf, E. R. Johnson 1934-10-15 6189 Colusa Cooks Springs, western part of county 549 Comment
  UCD37715  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD61441  Cuscuta californica var. californica Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3886 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 335 Comment
  UCD67007  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2740 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  UCD163659  Cuscuta indecora var. indecora Craig Thomsen 1998-6-10 1957 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  CHSC32212  Cycladenia humilis var. humilis James Jokerst 1980-8-7 1063 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
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Jun 8 2007
  JEPS15571  Cycladenia humilis var. humilis G. Thomas Robbins with L. R. Heckard 1956-7-25 3711 Colusa s. flank of Snow Mt. East (at lower edge of cirque between Snow Mt. West and Snow Mt. East, slope above Dark Hollow Creek (tributary of Middle Fork Stony Creek)) 1981 Comment
  UCR152111  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 mi south of College City, just NE of Hershey Railroad siding; Grieve Road (Country Road 88) Comment
  CAS-BOT-BC114731  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa Roadside hollow in shallow overflow from rice fields, 3 mi W of Williams. 30 Comment
  CHSC94416  Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  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
  SEINET7581552 Image available Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1100548  Cyperus difformis Herbert L. Mason and Verne Grant 1946-8-13 13011 Colusa 2 mi. w. Colusa (on Williams hwy. by bridge; Butte Sink); Butte Sink Comment
  UC698628  Cyperus difformis P. B. Kennedy 1925-9-18 Colusa Cortena, Colusa Comment
  UCD141020  Cyperus difformis June McCaskill 1954-8-9 362 Colusa ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. Comment
  UCD141021  Cyperus difformis June McCaskill 1954-8-23 372 Colusa 7 miles east of Arbuckle, jus north of the road east from Arbuckle. Comment
  CHSC94430  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD54036  Cyperus eragrostis K. Esau; D. Hartmenn 1941-7-17 s.n. Colusa near Williams. 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
  JEPS120707  Cyperus erythrorhizos Lowell Ahart 2013-10-1 19078 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1099935  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-9-5 13115 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100515  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-8-13 13012 Colusa 2 mi. w. Colusa (on Williams hwy. by gridge); Butte Sink Comment
  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
  CAS-BOT-BC445509  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  UC72286  Damasonium californicum Emma Wilkins 1905-1 Colusa near College City College City; Sacramento Valley 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
  RSA724964  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  UC26117  Datura stramonium J. Burtt Davy May, 1898 4301 Colusa near Princeton; near Princeton Comment
  JEPS110408  Datura wrightii Lowell Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1 1/2 miles (air) east of East Park Reservoir, about 4 1/2 miles (air) northeast of Lodoga 545 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
  UCD63774  Daucus pusillus Craig D. Thomsen 2008-5-23 2754 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 420 Comment
  UCR254940  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodoga 370 Comment
  JEPS81344  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  UCD38812  Delphinium hesperium Beecher Crampton 1958-5-19 4798 Colusa 5.8 miles south of Lodoga. Comment
  UCD57667  Delphinium hesperium Erica A. Smith; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  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
  CDA11416  Delphinium hesperium subsp. pallescens G. F. Hrusa, K. van Katwyk 1995-4-22 12137 Colusa Inner North Coast Ranges; Small colony on low slope in partial shade of Quercus douglasii on S side of Leesville Rd. approx. 3 m. N of Hwy 20, flowers light purplish to near white. Rather tall-to 3 ft., most individuals just beginning bloom. Comment
  CHSC83252  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley. Comment
  CHSC89286  Delphinium hesperium subsp. pallescens G. F. Hrusa 1998-6-19 14606 Colusa Northern California. North Coast Ranges. Above Little Stony Creek. Goat Mtn. Rd. +- 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  UC1777719  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley 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
  JEPS6254  Delphinium hesperium subsp. pallescens W. L. Jepson 1932-5-7 16261 Colusa Venado (2 mi. above, in a little valley), Southwestern Colusa County 304 Comment
  POM149761  Delphinium patens Roxana S. Ferris 1917-4-14 550 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road 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
  HSC71332  Delphinium patens Thomas W. Nelson, Jane P. Nelson 1979-4-11 4613 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  CAS-BOT-BC116431  Delphinium patens subsp. patens Roxana S. Ferris 1926-4-23 6446 Colusa Grapevine Grade near top between Stonyford and Sites Comment
  CAS-BOT-BC17110  Delphinium uliginosum D. E. Breedlove 1963-5-30 5184 Colusa 17 miles E of Bartlett Springs 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
  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
  HSC83375  Delphinium variegatum E. L. Wong 1975-4-20 3 Colusa Bear Valley Rd. 9.5 mi. N of Hwy. 20 404 Comment
  POM174567  Delphinium variegatum Roxana S. Ferris 1926-4-23 6582 Colusa 2 miles from Stony Ford. Comment
  SEINET5338170  Delphinium variegatum W. Roderick 1967-5-7 s.n. Colusa Bear Valley. 305 Comment
  CAS-BOT-BC16955  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-11 1210 Colusa Bear Creek Canyon 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
  CHSC89827  Delphinium variegatum subsp. variegatum B. Castro; L. Janeway 2001-5-2 1244 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak woodland. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  UCD14329  Delphinium variegatum subsp. variegatum Kathi A. Zurakowski 1984-4-21 Colusa Colusa Co.; Bear Valley, 9.2 miles north of Wilbur Springs turnoff, on the east side of the road 381 Comment
  CAS-BOT-BC192669  Deschampsia danthonioides L. R. Abrams 1928-5-8 12591 Colusa 2 miles south of Arbuckle Comment
  JEPS75435  Deschampsia danthonioides W. L. Jepson 1934-5-3 16601 Colusa Stegeman sta. n. of Colusa Comment
  UCD63907  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection (about 0.3 mile east of Hwy 20 'Vista Point'). 345 Comment
  POM92544  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 549 Colusa 4 miles east of Williams Comment
  RSA756435  Deschampsia elongata Barbara Ertter 1989-7-1 8609 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  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
  CHSC48439  Dicentra chrysantha Vernon Oswald 1984-7-20 1609 Colusa M10, 11.3 mi w of Rd. 306 at Stonyford. 792 Comment
  CAS-BOT-BC277739  Dichelostemma Mona Bourell 1997-3-29 5810 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  UC71643  Dichelostemma capitatum Miss Alice King 1905-1 Colusa College City Comment
  HSC22054  Dichelostemma capitatum subsp. capitatum D. R. Junell 1965-4-18 23 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  HSC72112  Dichelostemma capitatum subsp. capitatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9532 Colusa Bear Valley Rd, 3 mi. from its junction with SR 20 366 Comment
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  SEINET3885768  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road, 3 miles southeast of Leesville; just below the summit of the pass on the east side.; 0 480 Comment
  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
  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
  CHSC29758  Diplacus tricolor K. R. Stern 1980-5-5 6626 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC29761  Distichlis spicata K. R. Stern 1980-6-30 6647 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS108780  Distichlis spicata Lowell Ahart 2006-9-26 13353 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
  JEPS118718  Distichlis spicata B. Castro, L. P. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  SBBG119874  Distichlis spicata L. Ahart 2003-8-15 10508 Colusa S side of St Hwy 20, ca. 1 mi SW of Williams 27 Comment
  CDA32963  Distichlis spicata Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  CAS-BOT-BC433232  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  CHSC87159  Dodecatheon hendersonii Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 Comment
  SEINET11262864  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites Logoda Road ca 4.7 miles NE of Logoda on the W end of Grapevine Pass.; 0 527 Comment
  SEINET8561748  Dodecatheon hendersonii R. R. Halse 2014-3-25 9030 Colusa W end of Grapevine Pass, along the Sites-Logoda Road, ca 4.7 miles NE of Logoda. 527 Comment
  UC1613493  Dodecatheon hendersonii Charles M. Belshaw 1937-4-25 2852 Colusa Vicinity of Cook's Spring Devil's Ridge, Inner North Coast Range Comment
  UCD162980  Dodecatheon hendersonii Craig D. Thomsen 2002-2-7 2562 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.2 miles west of Hwy 20/16 intersection, west end of large turnout. 345 Comment
  UCD56911  Dodecatheon hendersonii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3514 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD118842  Dodecatheon hendersonii subsp. hendersonii Victor Duran 1933-4-3 3378 Colusa Stonyford. 304 Comment
  CHSC83635  Downingia insignis L. P. Janeway 2002-4-25 7527 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Bottom of drainage. 60 Comment
  JEPS5035  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa College City 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
  JEPS33725  Downingia pulchella D. E. Breedlove 1963-5-30 5191 Colusa 5 mi w Leesville Comment
  LA204320  Draba cuneifolia A. L. Haines; William Stewart 1935-2-10 sn Colusa 2 mi. N of Miller's Landing 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
  HSC45678  Dudleya cymosa Stephen Plant 1978-4-22 203 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD81726  Dudleya cymosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5729 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  JEPS120637  Dysphania botrys Lowell Ahart 2013-10-1 19087 Colusa Strand of East Park Reservoir, about 2.5 air miles southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 air miles northwest of Sites. Comment
  UCD32928  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa Colusa County, 4.5 miles south of Grimes. Comment
  UCD34845  Echinochloa crus-galli var. crus-galli Beecher Crampton 1963-9-9 6890 Colusa 1/4 mile E of Cortena. Comment
  JEPS47814  Echinochloa crus-pavonis W. L. Jepson 1929-10-1 15345 Colusa Maxwell Comment
  CDA1985  Echinochloa muricata E. A. Biondi 1972-1 Colusa Colusa. 0 Comment
  UCD61170  Echinochloa oryzoides P. B. Kennedy 1925-9-18 Colusa Rice Station, Cortena. Comment
  UCD61175  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Cortena. Comment
  UC1562615  Echinodorus berteroi Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8879 Colusa n.w. side East Park reservoir (near end of East Park Rd. from Stonyford) 365 Comment
  CAS-BOT-BC445569  Echinodorus berteroi Gordon H. True 1974-11-15 7840 Colusa On Delevan Road just west of Four Mile Road, 4 mi. east of Delevan 27 Comment
  UCD137952  Echinodorus berteroi P. B. Kennedy 1925-9-1 s.n. Colusa Cortina. Comment
  UC1192126  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa below causeway over Butte Sink spillway, e bank of Sacramento River, 1 mi n Colusa; Sacramento River, Butte Sink spillway Comment
  CAS-BOT-BC291139  Eclipta prostrata Milo S. Baker 1946-9-4 11588 Colusa Along Gridley--Princeton Rd. in Butte Sink Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  CHSC107160  Eleocharis macrostachya L. P. Janeway; B. Castro 2011-5-19 10288 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. Mass of this along south edge of the marsh. Occasional patches of this scattered through much of the marsh. 49 Comment
  SD225710  Eleocharis macrostachya Carol Witham, Jennifer Buck 2001-4-30 156 Colusa 2 miles south of the town of Clusa alng Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  UCD163346  Eleocharis parishii Craig D. Thomsen 2000-5-11 2352 Colusa Walker Ridge. Buck Flat. 129 Comment
  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
  JEPS80832  Eleocharis suksdorfiana L. R. Heckard and J. C. Hickman 1981-8-1 5804 Colusa between new Fouth Camp and High Rock (s. side of Snow Mt.); Snow Mt. 1905 Comment
  UCD61690  Elymus elymoides subsp. californicus D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  CHSC94631  Elymus glaucus subsp. glaucus Lowell Ahart 2006-6-11 12671 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
  JEPS75758  Elymus glaucus subsp. glaucus L. R. Heckard and R. Bacigalupi 1976-9-6 4441 Colusa just e Fouts Camp; Snow Mtn. 1859 Comment
  CAS-BOT-BC228536  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  UCD62453  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville. Comment
  UCD84516  Elymus trachycaulus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6067 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  UC1795019  Elytrigia elongata R. K. Brummitt 1997-6-11 19696 Colusa 1 km W of Colusa on Route 20 100 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
  UC1609171  Emmenanthe penduliflora Vernon H. Oswald and Lowell Ahart 1993-5-27 5431 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 rd mi e of Lodoga) 481 Comment
  CHSC112237  Emmenanthe penduliflora var. penduliflora Lowell Ahart 2013-5-1 18686 Colusa Inner North Coast Ranges. Near a small drainage, north of the of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC60744  Emmenanthe penduliflora var. penduliflora Vernon H. Oswald; Lowell Ahart 1993-5-27 5431 Colusa Sites-Lodoga Rd. ca 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). In loose mudstone along the road. 481 Comment
  UCD105385  Epilobium brachycarpum P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  JEPS80757  Epilobium brachycarpum L. R. Heckard and J. C. Hickman 1981-7-29 5724 Colusa road above Summit Springs (s side of mt., Colusa-Lake Co. boundary); Snow Mt. 1569 Comment
  UC73325  Epilobium campestre Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD66925  Epilobium campestre Craig D. Thomsen; G. Harrington 2008-7-6 2786 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  JEPS80785  Epilobium ciliatum subsp. ciliatum L. R. Heckard and J. C. Hickman 1981-7-30 5758 Colusa se side of mt. Snow Mt., Trout Creek 1600 Comment
  SBBG120018  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  CHSC71440  Epilobium densiflorum Vernon H. Oswald; Lowell Ahart 1998-7-15 9303 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In a meadow. 792 Comment
  JEPS94756  Epilobium densiflorum Vernon H. Oswald and Lowell Ahart 1998-7-15 9303 Colusa 6.3 mi n of Highway 20 (w side of Walker Ridge Road 8.2 mi s of Bartlett Springs Road); Walker Ridge Road 792 Comment
  SBBG119942  Epilobium densiflorum L. Ahart 2006-8-9 13140 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  JEPS80262  Epilobium densiflorum L. R. Heckard and J. Hickman 1980-9-15 5442 Colusa n Summit Springs (n side of road, Lake-Colusa Co. boundary); Snow Mt. 1524 Comment
  CHSC80234  Epilobium foliosum B. Castro; L. P. Janeway 2000-5-2 1118 Colusa Vicinity of Sites-Lodoga Rd, and Grapevine Creek. On W-facing slope by dirt road just E of creek. 249 Comment
  JEPS86627  Epilobium foliosum L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6709 Colusa 0.5 mi ne Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1640 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
  CHSC70986  Epilobium minutum Vernon Oswald; Lowell Ahart 1998-5-7 9005 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  CHSC94885  Epilobium minutum Lowell Ahart 2006-6-11 12679 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
  CDA38115  Epilobium minutum T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS79752  Epilobium minutum L. R. Heckard and J. C. Hickman 1980-7-2 5302 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mtn. 1661 Comment
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Feb 26 2013
  CHSC32221  Epilobium nivium James Jokerst 1980-8-6 1049 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
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Dec 23 2008
  CAS-BOT-BC58020  Equisetum Roxana S. Ferris 1926-4-21 6312 Colusa Near Sycamore. 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
  UCD70303  Equisetum laevigatum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Serpentine riparian alder forests (Alnus rhombifolia) growing on alluvial sands at Stoney Creek. 420 Comment
  HSC97370  Eragrostis cilianensis J. P. Smith, J. O. Sawyer 2007-9-2 12418 Colusa River Rd. N of Colusa 20 Comment
  CHSC113050  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  POM198506  Eragrostis hypnoides Roxana S. Ferris 1916-7-8 383 Colusa In bed of Sycamore Slough Comment
  UC188873  Eragrostis hypnoides H. P. Chandler 1905-9-14 Colusa Princeton 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
  RSA725279  Eragrostis pectinacea L. Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC94401  Eragrostis pectinacea var. pectinacea Lowell Ahart 2006-8-9 13164 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCR261668  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
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Dec 15 2016
  UCR261669  Eriastrum abramsii Ann Howald 2003-5-29 2343 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
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Dec 15 2016
  CHSC111703  Eriastrum brandegeeae David Isle; F. Thomas Griggs 1979-5-23 2063 Colusa Little Stony Creek Watershed. 1/2 mile W of Lodoga Rd/Goat Mtn. Rd junction, off S side Goat Mtn. Rd (off both sides within 6 feet of rd.). 402 Comment
  UCD82570  Eriastrum tracyi Tom Zavortink; Gordon Harrington 2009-5-25 s. n. Colusa East side and downslopte of Walker Ridge Road just NE of Til Jones Spring. 779 Comment
  JEPS123252  Eriastrum tracyi David Gowen 2004-6-23 130 Colusa West of Stonyford near Fouts Springs. Toward the western edge of Davis Flat. Comment
  RSA293106  Ericameria linearifolia Thomas W. Nelson, Jane P. Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 miles from its junction with State Route 20 Comment
  CHSC94392  Erigeron bonariensis Lowell Ahart 2006-8-22 13225 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD84637  Erigeron greenei G. Harrington 2009-7-21 86 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  JEPS75738  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-10 3899 Colusa e slope East Peak; Snow Mt., East Peak 2103 Comment
  CAS-BOT-BC216004  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony Creek 2.5 miles east of Bonnie View, Inner North Coast Ranges 518 Comment
  RSA0056304  Eriodictyon californicum James R. Shevock 1971-4-8 938 Colusa Sites Lodge Rd., near Grapevine Pass. 426 Comment
  RSA60348  Eriodictyon californicum G. R. Campbell 1948-6-18 649 Colusa 2 miles south of Wilbur Springs. Comment
  CHSC92834  Eriogonum covilleanum D. Isle 2000-6-7 1246 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  OBI6297  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  SBBG83903  Eriogonum dasyanthemum 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
  UC1552811  Eriogonum dasyanthemum Frederica Bowcutt 1985-6-19 606 Colusa ridge about 2 air miles n Wilbur Hot Springs (just sw of Bear Valley); Wilbur Springs Quad (15') Comment
  UCR263625  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  JEPS57028  Eriogonum dasyanthemum W. L. Jepson 1934-7-28 16749 Colusa hills se of Cortina Valley Comment
  OBI47577  Eriogonum dasyanthemum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi W of Mendocino NF boundary on Stony Crk rd 671 Comment
  RSA488801  Eriogonum dasyanthemum James L. Reveal 1988-6-2 6985 Colusa Walker Ridge Road along Lake County line, 3.3 miles north of the turnoff to Jordan Valley Dam and 0.2 mile south of the summit of the road, about 9 miles north of California Highway 20 and 7 miles south of the Bartlett Springs Road 1082 Comment
  UC178340  Eriogonum dasyanthemum Katharine Brandegee Colusa Bear Valley to Leesville Comment
  UCD69100  Eriogonum dasyanthemum P. Rodriguez-Rojo 1997-7-25 Colusa Walker Ridge Rd. On disturbed serpentine soils. UTM: 10SEP4425 890 Comment
  UCSB1430  Eriogonum gracile Keator, Glenn 1958-6-16 Colusa just east of Colusa-Lake County line; on road from Lower Lake to Sacramento Valley Comment
  UC201699  Eriogonum hirtiflorum Volney Rattan June, 1884 Colusa above Stony Creek Comment
  CDA11259  Eriogonum luteolum var. luteolum G. F. Hrusa 1994-11-7 11994 Colusa North Coast Biodiversity Arena; N side of Little Stony Creek. Approx. 2.5 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  CDA15552  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa North Coast Ranges; Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  JEPS75856  Eriogonum spergulinum var. reddingianum L. R. Heckard 1974-9-10 3894 Colusa e ridge of East Peak, Snow Mt. Snow Mt. 2042 Comment
  CHSC92619  Eriogonum strictum var. greenei D. Isle 2005-8-1 1156 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile South of Goat Mountain lookout. 1804 Comment
  JEPS75747  Eriogonum strictum var. greenei L. R. Heckard, and R. Bacigalupi 1976-9-6 4422 Colusa above Summit Springs (along trail to Fout's Camp); Colusa-Lake County Line, Snow Mt. 1645 Comment
  CAS-BOT-BC267413  Eriogonum tripodum G. L. Stebbins 1972-6-25 9001 Colusa East side of Black Diamond Ridge, 5 miles northwest of Stonyford 579 Comment
  UC1299713  Eriogonum tripodum Freed W. Hoffman 1947-6-19 1618 Colusa between Ladoga and Cook Springs Comment
  CDA1339  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa 1/3 mi S of Goat Mountain Lookout. Comment
  JEPS73454  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1972-7-8 3054 Colusa n side of ridge running se Snow Mt., West Peak 1981 Comment
  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
  RSA713163  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa Mendocino National Forest: Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile south of Goat Mountain Lookout. 1805 Comment
  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
  UCD66997  Eriogonum wrightii var. trachygonum Gordon Harrington 2008-8-14 80 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 junction. Just south of the Brophy Creek - Bear Creek confluence on the east side of Bear Creek (west side of Hwy 16). North side of gravel turn-out. 210 Comment
  CHSC91046  Eriophyllum lanatum D. Isle 2003-6-12 371 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS 10S 524888E 4345370N, ridgetop. 1816 Comment
  HSC66004  Eriophyllum lanatum var. achilleoides Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 39 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  RSA755891  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  SD53217  Eriophyllum lanatum var. achilleoides Darley F. Howe 1962-5-19 3283 Colusa 20 miles west of Williams 395 Comment
  SDSU4094  Eriophyllum lanatum var. achilleoides D. F. Howe 1962-5-19 3283 Colusa 20 miles west of Williams on #20. 396 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
  UCD82123  Erodium cicutarium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5651 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR238747  Erodium moschatum George K. Helmkamp, E. A. Helmkamp 2012-2-9 18536 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC211070  Eryngium Roxana Stinchfield 1916-7-9 404 Colusa Along Sacramento River near Sycamore Comment
  CAS-BOT-BC211071  Eryngium Roxana Stinchfield 1916-6-18 309 Colusa R.R. embankment near College City Comment
  CHSC84964  Eryngium aristulatum Lowell Ahart 2003-10-23 10662 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  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
  UC660108  Eryngium aristulatum var. aristulatum Milo S. Baker 1941-7-8 10110 Colusa s. Stony Ford (Valley along Bear Creek); Valley along Bear Creek Comment
  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
  CAS-BOT-BC40751  Erysimum capitatum Roxana S. Ferris 1917-4-14 576 Colusa Arbuckle-Rumsey Road. Foothills 7 miles west of Arbuckle. Comment
  UC1034721  Erysimum capitatum G. B. and R. P. Rossbach 1938-5-31 851 Colusa ravine slope about 18 mi w Williams 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
  HSC71302  Erysimum capitatum var. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-12 4624 Colusa Along Stony Creek below Digger Pine Campground 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
  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
  CHSC84196  Erythranthe microphylla Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  CAS-BOT-BC402663  Eschscholzia caespitosa Roxana S. Ferris 1926-4-23 6426 Colusa Summit of grade, Williams - Stonyford Road Comment
  UCD82626  Eschscholzia caespitosa Craig Thomsen; G. Harrington 2009-5-12 2896 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  RSA388342  Eschscholzia caespitosa subsp. caespitosa Harold Grams 1975-4-12 5 Colusa State Highway 16, 16 miles north of Rumsey Comment
  UCD70236  Eschscholzia californica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CAS-BOT-BC402978  Eschscholzia californica Roxana S. Ferris 1917-4-14 603 Colusa 3 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC5884  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC5885  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC5887  Eschscholzia californica var. crocea Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  UC71635  Eschscholzia lobbii Miss Alice King 1905-1 Colusa College City Comment
  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
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  UCD57049  Euphorbia spathulata Gordon Harrington; Diana Hickson 2007-4-7 14 Colusa BLM Payne Ranch, SW of intersection Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  UCD66873  Euphorbia spathulata Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5076 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. South of junction with trail that heads down to the headwaters of Thompson Creek, upslope of very large stock pond. 629 Comment
  UCD81254  Euthamia occidentalis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5419 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 312 Comment
  UCD82573  Extriplex joaquinana Craig Thomsen 2008-6-12 2764 Colusa Walker Ridge, near Elgin Mine on Lucientes property. 655 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
  CAS-BOT-BC77677  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCD72474  Forestiera pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3808 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 south end of bridge, east side of creek. 252 Comment
  CAS-BOT-BC63012  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  CAS-BOT-BC63015  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  SEINET7417533 Image available Frangula californica subsp. crassifolia E. Lee 1936-12-13 2612 Colusa Stonyford-Lodoga Road Comment
  UCD66952  Frangula californica subsp. crassifolia Ellen Dean; Davis Botanical Society 2008-5-31 4996 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  RSA123211  Frankenia salina H. S. Yates 1936-8-14 6135 Colusa 3 miles S. of Colusa 15 Comment
  UCD67670  Fraxinus dipetala D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  UCD70234  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  CAS-BOT-BC223489  Fraxinus latifolia Roxana Stinchfield 1916-7-8 391 Colusa Sycamore Slough Comment
  CAS-BOT-BC223490  Fraxinus latifolia Roxana S. Ferris 1917-4-17 616 Colusa Sycamore Slough Comment
  CAS-BOT-BC383131  Fraxinus latifolia Andrew Townesmith; Karen M. Meyer 2007-8-7 911 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from intersection with Forest Service route M10 1371 Comment
  UCSC010486  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  JEPS74659  Fritillaria glauca James E. Eckenwalder 1974-6-2 359 Colusa on w flank of east peak of Snow Mountain Snow Mountain Comment
  CAS-BOT-BC130432  Fritillaria pluriflora Gladys L. Smith 1978-3-18 4800 Colusa Bear Valley, on Wilbur Springs Road Comment
  JEPS61959  Fritillaria pluriflora W. L. Jepson 1932-5-8 16287 Colusa Stonyford, west Colusa County Stonyford 365 Comment
  JEPS89227  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  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
  UC1179069  Fritillaria pluriflora Herbert L. Mason 1947-3-30 13165 Colusa 0.5 mi e of Lake County Line (on Williams-Lower Lake Highway, western Colusa County); Williams-Lower Lake Highway Comment
  UCD163302  Fritillaria pluriflora Craig D. Thomsen 1997-4-7 1893 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCR261601  Fritillaria pluriflora Ann Howald 2003-3-26 2293 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.5 miles north of Lodoga, c. 0.2 mi south of Chisolm Cove Group Campground 373 Comment
  UCR261613  Fritillaria pluriflora Ann Howald 2003-3-12 2279 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2 miles southeast of Stonyford 379 Comment
  UCR261615  Fritillaria pluriflora Ann Howald 2003-3-11 2276 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga 365 Comment
  SEINET10469567  Fritillaria pluriflora Mary Susan Taylor, J. Lacey 1982-4-14 Taylor 4344 Colusa In deep adobe clay, both sides of Stonyford Cemetary Lane, ca. 1.5 mi w of Stonyford, s of Fouts Springs Rd. 1200 ft. 365 Comment
  UCD170086  Fritillaria purdyi Jack Alderson 2016-4-4 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 3600 feet (1100 m) southwest of the intersection of Highway 20 and Highway 16. 502 Comment
  CDA15495  Fritillaria recurva G. F. Hrusa, WTD 1998-6-19 14632 Colusa North Coast Ranges; N side of Goat Mtn. summit area. Comment
  SDSU20636  Fritillaria recurva Sean Ryan, Michael G. Simpson 2010-6-21 56 Colusa NW facing slope on north side of Forest Road 16N02. Approximately 0.23 miles NE of intersection with Forest Road 16N03. SW of Black Oak Campground, NNW of Goat Mountain. Mendocino National Forest. 1692 Comment
  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
  HSC72172  Galium andrewsii J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9549 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 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
  JEPS120712  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-10-1 19067 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
  JEPS121119  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-5-1 18694 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS75835  Galium bolanderi L. R. Heckard 1974-9-11 3952 Colusa along Summit Springs trail Snow Mt. 1798 Comment
  UC1229763  Galium bolanderi Francia Chisaki and Helen K. Sharsmith 1959-5-27 1335 Colusa at Mill Creek Crossing (road leading out of Red Bridge camp) Comment
  JEPS24234  Galium grayanum var. nanum Peter H. Raven, R. Snow 1959-9-11 14411 Colusa s shoulder Snow Mountain 2042 Comment
  JEPS88931  Galium grayanum var. nanum Milo S. Baker 1929-7-1 3516 b Colusa near top Snow Mt. 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
  UC1177932  Galium parisiense Francia Chisaki and Gene B. Newcomb 1958-6-19 1134 Colusa about 3 mi w Stonyford (along path leading to dam); Diversion Dam Camp Comment
  UCD82120  Galium parisiense Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5648 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD81242  Galium porrigens var. tenue Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5406 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  CDA12374  Garrya congdonii G. F. Hrusa 1996-1-2 12627 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  CAS-BOT-BC178549  Garrya flavescens A. Burgard; J. Goldsmith; J. Kalt 1996-3-30 17 Colusa Walker Ridge Rd. 4.1 mi. north of intersection with Indian Reservoir Rd. 57 mi. east of Hwy. 101 on Hwy. 20. 938 Comment
  OBI14152  Garrya veatchii Rimo Bacigalupi, G. T. Robbins 1954-6-25 4623 Colusa 1/2 mi E of summit (Lake-Colusa County line) on rd from Indian Valley (Lake County) to Bear Valley (Colusa County) 549 Comment
  CHSC85961  Gastridium phleoides Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 106 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
  UCD103294  Geranium carolinianum Beecher Crampton 1958-5-19 4806 Colusa west of Lodoga, Little Stony Creek Canyon. Comment
  UCD57560  Geranium dissectum Stephanie Castle; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek. 304 Comment
  UCR233360  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa Western Sacramento Valley, along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  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
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley 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
  SEINET12278770  Gilia capitata C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  JEPS108813  Gilia capitata subsp. capitata Lowell Ahart 2006-6-11 12676 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS121000  Gilia capitata subsp. capitata Lowell Ahart 2013-5-1 18663 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  SD133959  Gilia capitata subsp. capitata Barbara Ertter 1989-7-1 8601 Colusa Road to Goat Mountain Lookout, 2.2 miles south of Rt. M-10 at head of South Fork Stony Crek, ca. 12 air miles westsouthwest of Stonyford. 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
  HSC45794  Gilia tricolor J. P. Smith, Thomas W. Nelson 1976-4-14 8581 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  HSC71310  Gilia tricolor Thomas W. Nelson, Jane P. Nelson 1979-4-11 4615 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville 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
  RSA388848  Gilia tricolor Virginia King 1975-4-20 9 Colusa Bear Valley Road, 8.7 miles north of State Highway 20 412 Comment
  UCD15437  Gilia tricolor Lisa Montang 1985-4-13 5 Colusa California, Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  CHSC79484  Githopsis specularioides B. Castro; L. P. Janeway 2000-5-4 1141 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 248 Comment
  POM312385  Glinus lotoides H. L. Mason 1945-7-11 12641 Colusa Near Butte creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  UCD66923  Glinus lotoides Craig D. Thomsen; G. Harrington 2008-7-6 2775 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  CAS-BOT-BC434996  Glinus lotoides Roxana Stinchfield 1916-7-9 425 Colusa Along Sacramento River, Phillips Ranch near Sycamore. 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
  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
  JEPS110101  Gnaphalium palustre Lowell Ahart 2006-8-9 13124 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS80185  Gnaphalium palustre L. R. Heckard with J. Hickman 1980-7-3 5337 Colusa just w of Summit Springs (sw of Snow Mt. (ca. 10 mi w of Stonyford), Colusa-Lake County boundary) 1548 Comment
  POM53851  Gnaphalium palustre Roxana Stinchfield 1916-6-17 289 Colusa At Tule levee, College City. Comment
  RSA724829  Grindelia camporum L. Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  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
  UCD58174  Grindelia camporum var. camporum Gordon Harrington 2007-5-31 66 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-BC305304  Grindelia hirsutula Roxana Stinchfield 1916-7-11 455 Colusa Colusa--Williams Road at the trough Comment
  JEPS113893  Grindelia hirsutula L. P. Janeway 2007-6-17 9059 Colusa Inner North Coast Ranges; Along Bear Valley Road and Bear Creek near Hwy 20. 325 Comment
  UC32098  Grindelia hirsutula J. Burtt Davy 1898-5-1 4271 Colusa near Willows Comment
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Sep 15 2014
  UCD82539  Grindelia hirsutula Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5692 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CHSC97316  Grindelia hirsutula var. davyi L. P. Janeway 2007-6-17 9059 Colusa Inner North Coast Ranges. Along Bear Valley Road and Bear Creek near Hwy 20. 325 Comment
  UC71636  Guillenia lasiophylla Miss Alice King 1905-1 Colusa College City Comment
  UC1151670  Hainardia cylindrica Beecher Crampton 1958-5-19 4825 Colusa Alkaline depression along USHwy. 99-W, 4 miles south of Maxwell Comment
  UCD70228  Hainardia cylindrica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual plant communities on serpentine temporal vernal pools. 370 Comment
  UCD85147  Hainardia cylindrica Beecher Crampton 1958-5-19 4795 Colusa 10.1 miles southeast of Leesville, foothill area. Comment
  UCD82440  Helenium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 a Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCD83665  Helenium Craig Thomsen; G. Harrington 2009-5-12 2859 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC117407  Helenium puberulum B. Castro; Tom Boullion 2009-6-26 1795 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
  CAS-BOT-BC309381  Helenium puberulum Roxana Stinchfield 1916-7-8 393 Colusa Bed of Sycamore Slough near Sycamore Comment
  CDA15546  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1/2 mi. from Lodoga/Stonyford Rd. Comment
  CHSC89839  Heliotropium curassavicum B. Castro; L. Janeway 2001-5-10 1250 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. At side of dirt road paralleling N-S-trending perennial creek. 381 Comment
  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
  UCD82509  Hemizonia Craig Thomsen; G. Harrington 2009-5-12 2867 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD163661  Hemizonia congesta Craig Thomsen 1998-6-10 1958 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  CHSC61405  Hemizonia congesta subsp. luzulifolia Vernon H. Oswald 1993-8-16 5808 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N end of E edge of Tract 41. Also in the south portion of the refuge. 25 Comment
  UCD160070  Hemizonia congesta subsp. luzulifolia Ellen Dean; Craig Thomsen and Davis Botanical Society 2015-4-25 8629 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Lynch Canyon near 'Bullfrog Pond. 384 Comment
  UCD61448  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3893 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1500 ft NW of parking lot. 368 Comment
  CAS-BOT-BC309737  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa Between Williams and Maxwell Comment
  JEPS80774  Heracleum lanatum L. R. Heckard and J. C. Hickman 1981-7-30 5747 Colusa s.e. slope Snow Mt. (Trout Creek trail); , Trout Creek trail 1645 Comment
  UC88280  Hesperevax acaulis var. acaulis B. 1885-5-1 Colusa Williams Comment
  UC88271  Hesperevax caulescens B. 1889-1-1 Colusa Colusa Comment
  UCR261648  Hesperevax caulescens Ann Howald 2003-4-23 2314 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 1.1 mi north of intersection with East Ruby King Road 403 Comment
  UCR261649  Hesperevax sparsiflora var. sparsiflora Ann Howald 2003-4-24 2319 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  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
  UC1212449  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4252 Colusa 1 mi n origin of Wilbur Springs road (near Hwy 20); Inner North Coast Ranges, Bear Creek drainage 365 Comment
  UC867722  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa on the grade about 3 mi w Leesville; Coast Range Comment
  UCD63873  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwys 16 and 20. Cowboy Camp area on the west side of Hwy 16, 1 mile south of Hwy 20. 0.25 mile west of public viewing area and Bear Creek. 305 Comment
  UCR212335  Hesperolinon californicum Craig D. Thomsen 2000-6-23 2382 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.25). 342 Comment
  CAS-BOT-BC175983  Hesperolinon californicum T. S. Brandegee 1884-6-1 s.n. Colusa Unspecified Comment
  SD51765  Hesperolinon congestum Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cooks Springs. 548 Comment
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Jul 18 2010
  CHSC88554  Hesperolinon disjunctum L. P. Janeway 2001-6-6 7128 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  JEPS11966  Hesperolinon disjunctum Rimo Bacigalupi with G. T. Robbins 1954-6-25 4622 Colusa 0.1 mi e Lake County line (e of summit of road from Bear Valley to Indian Valley) 640 Comment
  UC1212486  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-17 4249 Colusa one mi beyond origin of Wilbur Springs road from State Hwy 20 Inner North Coast Ranges, Bear Creek drainage 335 Comment
  UC1212498  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4033 Colusa on Bartlett Springs road 4.4 mi from Leesville (western margin of county); Inner North Coast Ranges 609 Comment
  UC1212515  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14301 Colusa slope between Fouts Springs Red Bridge Public Camp; Inner North Coast Ranges, Mendocino National Forest Comment
  UC1601227  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 a Colusa Cook Springs Inner North Coast Ranges 548 Comment
  UCR148797  Hesperolinon disjunctum Daniel Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Bear Valley Road, Bear Valley Creek 372 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
  CAS-BOT-BC176222  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa Near road from Stoneyford to Fouts Springs, ca. one mile above Diversion Dam of Big Stoney Creek, Mendocino National Forest 518 Comment
  HSC103533  Hesperolinon disjunctum Thomas W. Nelson, Jane Nelson 1986-5-25 8093 Colusa Along Forest Service Rd. 18N03, just west of Fouts Spring Campground 152 Comment
  OBI47609  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi W of Mendocino Nat. Forest boundary on Stony Crk rd (Stonford 15' Quad 671 Comment
  RSA151803  Hesperolinon disjunctum H. K. Sharsmith 1951-7-13 4031 Colusa Fouts Springs, near Mill Creek at junction with road to Black Diamond Ridge, Mendocino National Forest. 457 Comment
  OBI12541  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa Inner North Coast Ranges. North cyn slope overlooking Cook springs 549 Comment
  UC1212306  Hesperolinon drymarioides Freed W. Hoffman 1947-6-19 1616 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
  UCD110523  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs. 548 Comment
  UCR71415  Hesperolinon drymarioides H. K. Sharsmith 1965-6-23 5528 Colusa Inner North Coast Ranges, N canyon slope overlooking Cook Springs 549 Comment
  CHSC118362  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
  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
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CAS-BOT-BC203371  Hibiscus lasiocarpos var. occidentalis Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  SEINET10946628  Hippuris vulgaris Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 914 Colusa Mendocino National Forest, Grindstone Ranger District. Lily Pond, off Forest Service road 17N02, 1.7 miles SW ofinteresection with Forest Service route M10. T17N R8W S24. 1264 Comment
  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
  UCD164149  Hoita macrostachya Craig Thomsen 1997-6-21 1930 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  CAS-BOT-BC320321  Holocarpha virgata A. A. Heller 1940-6-7 15721 Colusa Near the foot of the grade east of Lodogo on the Sites road Comment
  CAS-BOT-BC320320  Holocarpha virgata Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Colusa. Coast Mts. North of San Francisco Bay Comment
  CAS-BOT-BC383129  Holocarpha virgata subsp. virgata Andrew Townesmith; Karen M. Meyer 2007-8-7 907 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Wolf Creek OHV staging area, off Forest Service route M10, 4.2 miles west of intersection with Lodoga-Stonyford road in Stonyford 452 Comment
  RSA0118629  Holocarpha virgata subsp. virgata Lowell A. Ahart 2013-10-1 19099 Colusa Near strand of East Park Reservoir, about 2 miles (air) southeast of Stonyford, about 3 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 375 Comment
  SEINET10758259  Holocarpha virgata subsp. virgata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 907 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Wolf Creek OHV staging area, off Forest Service route M10, 4.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W. 452 Comment
  UCD55458  Holocarpha virgata subsp. virgata Ellen Dean; Gordon Harrington 2006-10-6 3282 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  CHSC110423  Hordeum brachyantherum David Isle 1990-5-6 1982 Colusa Stony Creek Watershed. Pendell Ranch about 2 mi W of Co. Rd. 306 jct. with Fouts Springs Road; abt 150 yds south of Pendell home. 384 Comment
  CHSC110864  Hordeum brachyantherum David Isle 1989-5-14 1995 Colusa Stony Creek Watershed. Pendell Ranch ~2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road; ~150 yds south of Pendell home. 384 Comment
  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
  UC1745700  Hordeum brachyantherum subsp. brachyantherum Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1391 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  CAS-BOT-BC284931  Hordeum brachyantherum subsp. californicum Roxana S. Ferris 1926-4-22 6300 Colusa 2 miles west of Colusa Comment
  CHSC106241  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 Ck, 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. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 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
  CAS-BOT-BC284988  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  UCD163711  Hordeum depressum Craig Thomsen 1999-5-10 2023 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CAS-BOT-BC285062  Hordeum marinum subsp. gussoneanum L. R. Abrams 1928-5-8 12593 Colusa 2 miles south of Arbuckle Comment
  JEPS118652  Hordeum marinum subsp. gussoneanum L. P. Janeway, B. Castro 2011-4-27 10243 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Comment
  SEINET10595754  Hordeum murinum Roxana S. Ferris 1917-4-12 Ferris 515 Colusa 4 miles E of Williams Alkali plains. Comment
  UCD86536  Hordeum vulgare Beecher Crampton 1962-4-17 6216 Colusa Sycamore. 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
  JEPS88739  Horkelia californica subsp. dissita Dean W. Taylor 1992-6-10 12696 Colusa Highway 162-Alder Springs Road ca 2 mi w from junction with Grindstone Road (Inner North Coast Ranges); Inner North Coast Ranges 1371 Comment
  JEPS93802  Horkelia californica var. elata Vernon H. Oswald and Lowell Ahart 1998-7-15 9270 Colusa Bartlett Springs Road 1.6 mi west of Bear Valley Road 487 Comment
  JEPS80769  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1981-7-30 5737 Colusa s.e. side Snow Mt. (along Trout Creek trail) 1676 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
  UCD82460  Hypochaeris glabra Craig Thomsen; G. Harrington 2009-5-12 2838 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD135955  Ibicella lutea Barry Rice 2012-6-11 BR 120601 Colusa near Hwy 20, 10 km west of I-5. 50 Comment
  RSA0013873  Ibicella lutea John H. Thomas 1960-8-29 8847 Colusa About 11 miles SW of Williams along Highway 20. Comment
  CDA19078  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958965 Colusa Sacramento Valley; At junction of I-5 Southbound and Hahn Rd, Williams. 0 Comment
  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
  UCD63772  Iva axillaris Craig D. Thomsen 2008-3-30 2723 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, 0.25 mile west of Hwy 16, about 1 mile south of Hwy 20. Comment
  JEPS106451  Juncus Barrett Anderson 2003-6-19 4875 Colusa Colusa County Airport along Hwy 20 SE of City of Colusa, pond N of the runway. 13 Comment
  CHSC84195  Juncus balticus Lowell Ahart 2003-7-14 10384 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
  CHSC86837  Juncus balticus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  UCD65641  Juncus balticus Craig D. Thomsen 2000-4-28 2178 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC107947  Juncus balticus subsp. ater B. Castro; Amy Lyons 2011-2-9 1830 A Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 400 ft northeast of Tehama-Colusa Canal. Large +- saline/alkaline wetland/ seasonal marsh. Western of the two Juncus patches at the south edge of the marsh. 49 Comment
  UCD61468  Juncus balticus subsp. ater Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3914 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/2 mile south of parking lot, along Bear Creek. 312 Comment
  UCD81220  Juncus bufonius Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5557 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. Canyons south of Destanella Flat. 438 Comment
  CHSC94468  Juncus bufonius var. bufonius Lowell Ahart 2006-8-9 13144 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC81326  Juncus bufonius var. congestus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  JEPS110176  Juncus ensifolius Lowell Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS73495  Juncus ensifolius L. R. Heckard 1972-7-10 3111 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 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
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  JEPS106502  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
  UCD82125  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5654 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CHSC118863  Juncus phaeocephalus var. paniculatus David Isle; Rhonda Isle 2017-6-5 2176 Colusa Foothills E edge of N Coast Range: W of Stoneyford ~1.5 miles on 18N01.1 ro Frank and Sheri Pendell Ranch; in black adobe pasture S of house 1/8 mile. 381 Comment
  CHSC107172  Juncus xiphioides L. P. Janeway; B. Castro 2011-5-19 10289 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. In and adjacent to a shallow swale that drains north into the marsh which is 3 m lower in elevation. 52 Comment
  CHSC111646  Juncus xiphioides David Isle; Justin Isle 1988-5-25 2092 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. S of Potatoe Hill Rd 17N12 at spring ~1 mile SW of Fouts Springs in the 1987 Fouts Fire secondary fireline rehab. 829 Comment
  JEPS118670  Juncus xiphioides L. P. Janeway and B. Castro 2011-5-19 10289 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  CAS-BOT-BC80913  Juniperus californica Roxana S. Ferris 1926-4-23 6456 Colusa 4 miles from Stanford on the Leesville Road Comment
  CHSC81201  Juniperus californica L. P. Janeway; B. Castro 2001-4-12 7017 Colusa Vicinity of Grapevine Creek, Funks Creek, and Antelope Valley. 158 Comment
  UC1221795  Juniperus californica Beecher Crampton 1958-5-19 4804 Colusa 1.3 mi s of Lodoga Comment
  CHSC94282  Keckiella corymbosa Lowell Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  HSC97013  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa S side of Stony Creek, at Mine Camp, about 3.5 mi. W of Stonyford. 422 Comment
  JEPS80852  Lactuca saligna L. R. Heckard and J. Hickman 1980-9-15 5432 A Colusa n of Summit Springs (n side of road; Lake-Colusa County boundary); Snow Mt. 1524 Comment
  RSA746963  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2008-10-14 14244 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UCD66601  Lagophylla minor Craig D. Thomsen 2000-5-11 2276 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
  UCD82162  Lagophylla minor Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5694 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCR227339  Lagophylla minor Craig D. Thomsen 2000-5-11 2303 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  CAS-BOT-BC341397  Lagophylla minor A. A. Heller 1940-5-6 15578 Colusa On State Highway #20, 2 miles west of the junction with Highway #16 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
  RSA0011767  Lagophylla minor A. A. Heller 1940-5-6 15578 Colusa On State Hwy 20, 2 miles W of the junction with Hwy 16. Comment
  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
  POM50993  Lagophylla ramosissima Roxana Stinchfield 1916-6-22 313 Colusa College City. Comment
  SEINET9310484  Lagophylla ramosissima Unknown 2009-5-20 14740 Colusa Central Inner Coast Ranges: along CA-16 near Bear Creek, 1.6 miles S of the jct with CA-20 (Glasscock Mountain 7.5' W). Chaparral and oak woodland. Occasional on open flat in disturbed soil. Comment
  UCR238928  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2012-2-9 18533 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC290604  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
  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
  CHSC77915  Lasthenia californica Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  CAS-BOT-BC337916  Lasthenia californica Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 46 Colusa Along Bear Valley Rd., 1.2 miles west of the junction with Brim Rd. 414 Comment
  UCD23380  Lasthenia californica subsp. californica George C. Ziobro 1978-4-8 2 Colusa collected off of Bear Valley Road 10.3 miles north of the junction with State Route 20. 396 Comment
  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
  UC90030  Lasthenia ferrisiae K. Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites 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
  JEPS118673  Lasthenia glaberrima B. Castro and L. P. 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. Sites 7.5' quad. Comment
  UC1535364  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa w side Bear Valley Road (11 mi (by road) n of junction with State Highway 20) 365 Comment
  HSC60475  Lasthenia glabrata J. P. Smith 1977-4-24 9041 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD163703  Lasthenia glabrata Craig Thomsen 1999-5-10 2015 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  CDA32830  Lasthenia glabrata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC72114  Lasthenia glabrata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9529 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  CAS-BOT-BC328109  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1917-4-12 503 Colusa 4 miles E of Williams Comment
  CAS-BOT-BC328107  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa Tule land 3 miles W of Colusa Comment
  CAS-BOT-BC352770  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi. NW of Rumsey 304 Comment
  UC638651  Lasthenia glabrata subsp. glabrata Ethel Crum 1938-5-8 2034 Colusa 4 mi s Leesville 426 Comment
  UCR247331  Lasthenia glabrata subsp. glabrata Peter Rubtzoff 1978-5-14 9167 Colusa Inner North Coast Range, Bear Valley Road, c. 4-5 miles south of junction of the road to Ft. Ross State Historic Park, Bartlett Springs Road 405 Comment
  UCD15423  Lasthenia gracilis Margit Sands 1985-4-13 26 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
  JEPS80130  Lathyrus brownii L. R. Heckard with J. Hickman 1980-7-1 5289 Colusa 10 mi w of Stonyford (Trail from Summit Springs to Frog Lake, Snow Mountain); Snow Mountain 1767 Comment
  JEPS127615  Lathyrus jepsonii var. californicus B. Castro with Tom Boullion 2008-6-4 1733 Colusa Ca 5 air miles N of Colusa, ca 0.5 mi E of Hwy 45 off N edge of Reservation Road. On upper terrace within levee, overlooking riprap-lined bend in the Sacramento River (River-mile 154.3). Comment
  CAS-BOT-BC323884  Layia chrysanthemoides Tamara Gedik; Thom Heinz; Rebecca Siegle 1996-5-4 49 Colusa 1.3 miles S of Brim Rd., on Bear Valley Rd.; 12.4 mi on Walker Ridge Rd. from Hwy 20 to Brim Rd. 408 Comment
  CAS-BOT-BC323886  Layia chrysanthemoides Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-4-1 010 Colusa On Bear Valley Road, 1.2 miles S of junction with Brim Road. 414 Comment
  CAS-BOT-BC323903  Layia chrysanthemoides Roxana S. Ferris 1926-4-23 6404 Colusa Roadside near Mountain House on Williams-Stonyford Road Comment
  CAS-BOT-BC323905  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  CDA12014  Layia chrysanthemoides G. F. Hrusa 1990-4-8 7666 Colusa North Coast Biodiversity Arena; S end of Bear Valley, 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
  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
  UC762527  Layia chrysanthemoides R. F. Hoover 1938-4-24 3221 Colusa Williams Comment
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. 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
  UCD15425  Layia fremontii Margit Sands 1985-4-13 28 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
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Apr 18 2009
  CHSC65801  Layia platyglossa L. P. Janeway; B. Castro, Linnea Hanson, Beth Corbin, Kim Earl 1995-4-28 4761 Colusa Southern end of Bear Valley just west of where the road crosses Bear Creek. 396 Comment
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May 24 2013
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  JEPS119407  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa. Comment
  SEINET11447842 Image available Layia platyglossa M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  JEPS13435  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey; Arbuckle road Comment
  JEPS13436  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek 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
  UC761855  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey-Arbuckle road Comment
  CAS-BOT-BC527300  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Below Letts Meadow on road from Bear Creek to Foutes Spring 914 Comment
  POM312464  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Lake below Letts Meadow on road from Bear Creek to Foutes Spring 915 Comment
  UCD138193  Lemna trisulca C. Richie Bell 1951-6-13 1167 Colusa below Letts Meadow on road from Bear Creek to Foutes Spring. 914 Comment
  CHSC61120  Lemna turionifera Vernon H. Oswald 1993-6-23 5570 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, near the SE corner of Cell 2, Pool 10. Along the edge of a marsh. 21 Comment
  CAS-BOT-BC534910  Lemna turionifera Verne Grant; Herbert L. Mason 1946-8-6 12966 Colusa Pond on Colusa-Marysville Highway, four miles south of Colusa, west side Sacramento River Comment
  UCD67066  Lepechinia calycina Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat. 554 Comment
  HSC101408  Lepidium chalepense J. P. Smith 2011-4-27 13143 Colusa Along Hwy. 16, 1.3 mi. S of junction with Hwy. 20 315 Comment
  CHSC79711  Lepidium dictyotum var. dictyotum L. P. Janeway; B. Castro 2000-3-23 6635 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  UCD63714  Lepidium draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20. Comment
  CAS-BOT-BC89762  Lepidium latipes M. K. Curran 1885-1-1 s.n. Colusa Williams. Comment
  CAS-BOT-BC89886  Lepidium nitidum Roxana S. Ferris 1917-4-12 514 Colusa 4 miles east of Williams. Comment
  UCD57342  Lepidium nitidum Sergio Testa 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  CAS-BOT-BC12797  Lepidium perfoliatum A. S. Strichfield 1926-4-1 s.n. Colusa Near Sycamore. Comment
  CHSC79002  Lepidium strictum J. Marr; C. Warren, H. West, N. Wight 1998-6-11 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek. 114 Comment
  UC1100305  Leptochloa fascicularis Herbert L. Mason and Verne Grant 1946-8-6 12962 Colusa pond on Colusa-Marysville Hwy 4 mi s Colusa (w side of Sacramento River) Comment
  UC1100306  Leptochloa fascicularis Herbert L. Mason 1945-9-19 12720 A Colusa e bank of river 1 mi n Colusa (below causeway); Sacramento River Comment
  UC596488  Leptochloa fascicularis R. F. Hoover 1936-7-31 1590 Colusa Maxwell Comment
  CAS-BOT-BC273929  Leptochloa fusca subsp. fascicularis James Moffett 1928-10-1 s.n. Colusa 5 miles north of Colusa Comment
  CAS-BOT-BC273930  Leptochloa fusca subsp. fascicularis Milo S. Baker 1944-7-18 10868 Colusa Several miles W. of Williams along Highway to Lake Co. Comment
  JEPS15570  Leptodactylon pungens G. Thomas Robbins with L. R. Heckard 1956-7-25 3710 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, s flank of Snow Mt. East, at lower edge of cirque between Snow Mt. Wsst and Snow Mt. East); Snow Mt. East, Dark Hollow Creek (trib. Middle Fork Stony Cr 1981 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
  UCD163676  Leptosiphon bicolor Craig Thomsen 1999-4-15 1977 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD58114  Leptosiphon bicolor Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3381 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. Along unimproved road that goes south from Hwy. 20, ca. 2.3 road miles W of junction with Hwy. 16. Unnamed valley with old building called 'Roadkill Cafe. 414 Comment
  RSA388851  Leptosiphon bicolor Eugene Tanimoto 1975-4-20 s.n. Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC19699  Leptosiphon ciliatus L. A. Wright Jr. 1971-3-27 6 Colusa Ca. 7 mi s of Williams on Hwy 30, on the n side of the road. 91 Comment
  HSC65995  Leptosiphon ciliatus Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 51 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  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
  HSC85855  Leptosiphon filipes Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  CAS-BOT-BC226707  Leptosiphon latisectus Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-5-6 027 Colusa 5.7 miles from Blue Oak Campground, North on Walker Ridge Road 853 Comment
  CHSC79792  Leptosiphon parviflorus L. P. Janeway; B. Castro 2000-5-4 6703 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD73115  Leptosiphon parviflorus Ellen Dean; G. Harrington 2008-3-17 4560 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Along old, unimproved road that traverses the ridge above the saddle between Thompson and Craig Canyons. 418 Comment
  UCR261672  Leptosiphon pygmaeus subsp. continentalis Ann Howald 2003-3-26 2294 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  UC1051736  Lesquerella occidentalis subsp. occidentalis Helen K. Sharsmith 1953-6-20 4291 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  NY180562  Lessingia adenophora M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  SD132027  Lessingia nemaclada Barbara Ertter, Neese,Fujii,Espindola 1989-10-21 8868 Colusa Brim Road, southwest of Leesville to Indian Valley Reservoir 609 Comment
  UCD66691  Lessingia nemaclada Craig D. Thomsen 2000-6-23 2372 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCR227341  Lessingia nemaclada Craig D. Thomsen 2000-6-23 2400 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  RSA134705  Lessingia nemaclada P. H. Raven, R. Snow 1959-9-11 14425 Colusa About 2 miles south-east of Happy Camp 762 Comment
  RSA758207  Lessingia ramulosa Doug Goldman 2005-7-23 3569 Colusa East side of Wilbur Springs Road, about 1.35 miles west of the intersection with Bear Valley Road and just east of Sulphur Creek. Wilbur Springs Resort. 415 Comment
  UC1552844  Lessingia ramulosa Frederica Bowcutt 1985-6-19 604 Colusa about 2 air mi n Wilbur Hot Springs (just sw of Bear Valley); Bear Valley, Wilbur Hot Springs Comment
  UCD61472  Lessingia ramulosa Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3918 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  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
  UC1736070  Lewisia rediviva var. rediviva Dean W. Taylor 1993-3-18 13310 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek, 411 Comment
  JEPS73452  Lewisia triphylla L. R. Heckard 1972-7-8 3052 Colusa n side of ridge running se of Snow Mt. West 2011 Comment
  JEPS76124  Leymus triticoides W. L. Jepson 1938-6-11 18990 Colusa on creek 4 mi se Wilbur Springs; Bear Creek Comment
  UCD163658  Leymus triticoides Craig Thomsen 1998-6-10 1956 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD164157  Leymus triticoides Craig Thomsen 2008-4-7 2424 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  CDA32489  Leymus triticoides W. C. Disney Jr. 1959-5-8 2344 Colusa Princeton area 0 Comment
  JEPS75708  Lilium pardalinum Alice Q. Howard 1972-7-10 11 Colusa along trail between Fouts Camp and Box Springs (on n side of ridge separating Trout Creek and Paradise Creek); Snow Mountain 1600 Comment
  JEPS80768  Lilium pardalinum L. R. Heckard and J. C. Hickman 1981-7-30 5736 Colusa along Trout Creek Trail, se side of Snow Mountain Snow Mountain; , Trout Creek Trail 1676 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
  UC1586056  Limosella acaulis Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8874 Colusa se end East Park Reservoir (n of Lodoga); se end of East Park Reservoir 365 Comment
  SEINET12326983  Linanthus bicolor E. J. Baker 1984-1 16 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams 143 Comment
  UC106862  Linanthus bolanderi T. S. Brandegee Apr 1889 Colusa Leesville Comment
  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
  JEPS74814  Linanthus parviflorus L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-7 4022 Colusa sw of Leesville (just sw of site of old Kowalski ranch (below upper dam road), Upper Indian Valley); Upper Indian Valley 396 Comment
  JEPS94194  Linanthus parviflorus Vernon Oswald and Lowell Ahart 1998-5-7 9006 .1 Colusa Bartlett Springs Rd. 2.1 mi. w. of Bear Valley Rd. and 0.8 m,i. e. of Sawtelle Valley & Grapevine Flat rds. 524 Comment
  JEPS86705  Linanthus rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6697 Colusa 0.5 km w Summit Springs (sw flank of mtn., Colusa-Lake County line); Snow Mtn. 1500 Comment
  UCD163884  Lithophragma affine Craig D. Thomsen 2002-4-10 2596 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  CDA34090  Lithophragma affine P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  RSA113934  Lithophragma campanulatum H. K. Sharsmith 1953-7-1 4403 Colusa Above Linger Longer Camp. Goat Mountain. Mendocino National Forest. 1616 Comment
  JEPS80090  Lithophragma glabrum L. R. Heckard with J. Hickman 1979-6-16 5098 Colusa nw of West Peak Snow Mt. (s end of Milk Ranch meadow); , , s end of Milk Ranch meadow 1950 Comment
  UCR261726  Lithophragma parviflorum var. parviflorum Ann Howald 2003-5-26 2342 A Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 0.2 mi north of intersection with East Ruby King Road 425 Comment
  JEPS121108  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa On the N side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD84437  Lolium perenne Jack Alderson 2009-4-19 35 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella Flat. 553 Comment
  UCR233445  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  CHSC42597  Lomatium californicum Vernon Oswald 1986-6-4 2080 Colusa M10, 0.2 mi w of its jct. with M5. 609 Comment
  HSC21551  Lomatium ciliolatum var. hooveri Lincoln Constance 1965-4-13 3756 Colusa Between Clear Lake Oaks and Williams, Hwy. 20, 2.7 mi. W of Hwy. 16 549 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
  HSC60362  Lomatium ciliolatum var. hooveri Phyllis Krieg 1979-4-14 Colusa 1067 Comment
  HSC45713  Lomatium dasycarpum subsp. tomentosum Sheila Logan 1978-4-22 73 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD148573  Lomatium hooveri G. Ledyard Stebbins 1985-5-19 C 529 Colusa Southeast of Goat Mountain peak. Pacific Point along Goat Rock Ridge, east of Goat Rock. (Exact location unknown; coordinates estimated by label maker. Note, Pacific Point at 3700 ft does not quite fall into Section 25.) 1127 Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD58105  Lomatium hooveri Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3352 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 556 Comment
  CAS-BOT-BC230056  Lomatium macrocarpum Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5683 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
  JEPS80091  Lomatium macrocarpum L. R. Heckard with J. Hickman 1979-6-16 5099 Colusa n. of meadow just w. of West Peak Snow Mt. 1965 Comment
  SEINET196147  Lomatium marginatum Robert F. Hoover 1941-5-2 4987 Colusa Just east of lake Coutny line on Williams Clear Lake highway 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
  JEPS16220  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  SEINET13944634 Image available Lomatium tomentosum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  JEPS16221  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  JEPS17580  Lomatium utriculatum W. L. Jepson 1932-5-8 16281 Colusa w. Colusa Co., Stonyford Comment
  UC1053478  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UC630428  Lomatium utriculatum Annetta Carter 1938-5-8 1387 Colusa 3 mi. n. Leesville (on Lodoga rd.); Inner N. Coast Range Comment
  UCD163304  Lomatium utriculatum Craig D. Thomsen 1997-4-7 1895 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD40907  Lomatium utriculatum Nelson Cronyn 1984-4-22 4 Colusa 3.2 mi. north of Hwy 20 on Bear Valley Road. About 300 yards from road. 381 Comment
  UC1299566  Lonicera interrupta Freed W. Hoffman 1948-6-29 2505 Colusa crossing at North Fork Stony Creek North Coast Ranges Comment
  UCD66539  Lonicera interrupta Craig D. Thomsen 2001-5-24 2516 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
  CHSC48018  Lonicera involucrata var. ledebourii Vernon Oswald 1984-7-20 1618 Colusa Letts Lake in Mendocino National Forest. Comment
  HSC45721  Lotus humistratus M. Alcasas 1978-4-22 45 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCR138666  Lotus humistratus M. Brooks, Julie Evens, H. Johnson 1997-3-29 8 Colusa Brim Road, 1.6 mi east of Brim Road/ Walker Ridge Road intersection 457 Comment
  JEPS110414  Lotus purshianus var. purshianus Lowell Ahart 2006-8-9 13112 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  RSA725014  Lotus unifoliolatus L. Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  UCD78332  Ludwigia hexapetala B. J. Grewell 2006-7-11 06- 17 -LU Colusa Delevan National Wildlife Refuge. Managed seasonal pond at SE corner of refuge, north of Maxwell Road, immediately west of Colusa Basin Drain. 17 Comment
  JEPS81378  Lupinus adsurgens L. R. Heckard and J. C. Hickman 1982-7-8 5989 Colusa 1/4 mi sw East Peak (Snow Mt.); , sw of East Peak 2087 Comment
  UCD82547  Lupinus albifrons Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5702 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  CAS-BOT-BC198402  Lupinus albifrons var. albifrons Roxana S. Ferris 1926-4-23 6422 Colusa Summit of grade Williams-Stonyford Road Comment
  RSA783302  Lupinus albifrons var. albifrons R. R. Halse 2010-3-21 7830 Colusa Along State Hwy 20 ca. 10.7 miles SW of its junction with Interstate Hwy 5 at Williams. In Salt Canyon. 154 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
  UCD66966  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5010 Colusa west of I-5 at Maxwell, east slope of Goat Mountian, along Goat Mountain Road, between Cedar grove campground and the summit, near crossing of tributary of Little Stoney Creek. 1309 Comment
  UCD83748  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 b Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  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
  HSC89708  Lupinus albifrons var. eminens Eric German, Klara Varga, Michele Cardinaux 1989-4-15 36 Colusa 3 mi. SW of Digger Pine Campground on Goat Mtn. Rd. 152 Comment
  HSC89740  Lupinus bicolor B. Hoffman, A. Eller, A. Smith 1989-4-15 24 Colusa Off Bear Valley Rd., 1.2 mi. S of Brim Rd. 396 Comment
  SBBG128983  Lupinus bicolor G. K. Helmkamp, E. A. Helmkamp 2011-4-1 17131 Colusa Antelope Valley, along Maxwell-Sites Rd, 0.4 mi SE of Sites 93 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
  UCR206360  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley, on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 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
  HSC14822  Lupinus densiflorus var. aureus D. R. Junell 1965-4-18 29 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  HSC85822  Lupinus densiflorus var. aureus David Munger, Jeff Dunk, Tallchief Comet 1987-4-12 72 Colusa Comment
  SEINET10485227  Lupinus densiflorus var. aureus Clemens 1977-4-16 CLEMENS 17 Colusa Moderate population, salt creek canyon, n side of salt creek, hwy 20, 10 mi w-sw of williams. Wilbur springs quad, t.15n, r.4w, sec.32, 15 ft e central border. Open bank along roadside. 143 Comment
  SEINET10870982  Lupinus densiflorus var. aureus Lison 1987-4-26 LISON 671 -1 Colusa 15.7 miles s of stonyford. Lessville - lodogo road. Grassy slope. Corolla Yellow Comment
  SEINET9296972  Lupinus densiflorus var. densiflorus Unknown 2009-5-20 14736 Colusa Glasscock Mountain Comment
  UC84449  Lupinus formosus Katharine Brandegee April 1889 Colusa Epperson's Comment
  NY15886  Lupinus formosus var. robustus A. A. Heller 1902-5-20 5573 Colusa Near College City Comment
  UC73241  Lupinus formosus var. robustus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  SEINET10485385 Image available Lupinus formosus var. robustus A. Arthur Heller 1940-4-21 Heller 15543 Colusa Plentiful in fields and along the highway 2 miles south of Williams. Upper Sonoran Life Zone. Comment
  UCR228655  Lupinus latifolius var. latifolius Ellen Dean, Davis Botanical Society 2008-5-31 5001 Colusa West of Hwy I-5 at Maxwell, east slope of Goat Mountain along Goat Mountain Road 1100 Comment
  CHSC106710  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Road to Goat Mt Lookout, 0.4 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1371 Comment
  JEPS104139  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the e and w side of Bear Valley Rd, ca 1/4 mi n of the intersection of Bear Valley Rd and Wilber Springs Rd and bridge. 379 Comment
  JEPS98385  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads 411 Comment
  RSA761032  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Road to Goat Mountain Lookout 0.4 miles south of Route M-10 (Bear Creek-Fouts Spring Road) at head of South Fork Stony Creek, about 12 air mile west-southwest of Stonyford. 1372 Comment
  CHSC30054  Lupinus microcarpus var. densiflorus D. Greenstein 1977-4-11 12 Colusa Salt canyon n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. Comment
  UC726766  Lupinus microcarpus var. densiflorus A. A. Heller 1940-5-6 15576 Colusa on steep clay banks along State Hwy #20 about 3 mi e junction with Highway #16 Comment
  JEPS108050  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Road, 4.4 mi N Leesville. 457 Comment
  CHSC107948  Lupinus microcarpus var. microcarpus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1849 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 170 ft northeast of Tehama-Colusa Canal. Ca 0.15 mi S of large +- saline/alkaline wetland/ marsh, on dry grassy hillside just downslope from canal. 59 Comment
  UCD66534  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-6-23 2421 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  HSC45734  Lupinus polycarpus M. Alcasas 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  SD239748  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites. 92 Comment
  SEINET5586445  Lupinus succulentus Richard R. Halse 2013-1 8736 Colusa Along the Leesville Road ca. 1. 8 miles northwest of its junction with State Hwy. 20, west of Williams. 85 Comment
  HSC89693  Lupinus succulentus William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Colusa Walker Ridge Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  UCD163325  Lycium barbarum Craig D. Thomsen 1997-4-19 1908 Colusa Wilbur Springs. About 4 miles north of Hwy 20. Vicinity of Blank Spring, about 0.75 miles west of Wilbur Hot Springs hotel, adjacent to Sulphur Creek. Comment
  UCD124975  Lycopus americanus Collector Unknown Date Unknown s.n. Colusa Exact location unknown. Comment
  CHSC107290  Lythrum californicum L. P. Janeway; B. Castro 2011-7-9 10509 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Edges of swale feeding south side of the marsh; at the only spot of bulrush. 49 Comment
  CHSC107980  Lythrum californicum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1883 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Ca 100 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CDA37495  Lythrum californicum D. Brown 1977-5-31 s.n. Colusa Near Williams. 0 Comment
  RSA0014830  Lythrum californicum H. L. Mason, Verne Grant 1946-8-7 12977 Colusa 8 miles north of Colusa; Butte Sink. Comment
  UCR225655  Lythrum hyssopifolia Craig D. Thomsen, Gordon Harrington 2008-7-6 2773 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  RSA0015853  Lythrum hyssopifolia Roxana Stinchfield 1916-6-17 286 Colusa At Tule levee, College City. 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
  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
  UC1543163  Madia citriodora Charlotte G. Nast 1936-4-17 147 Colusa Williams to Lake Co. Road; Williams to Lake Co. Road Comment
  RSA718046  Madia elegans subsp. densifolia L. Ahart 2006-8-9 13095 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  CHSC48178  Madia elegans subsp. elegans Vernon Oswald 1986-6-30 2174 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  UCD57855  Madia exigua Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 43 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
  CHSC89612  Madia gracilis B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1446 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 167 Comment
  RSA262347  Maianthemum stellatum J. M. Tucker, L. K. Mann 1959-5-30 3529 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
  UC725449  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa below the road near the foot of the grade e Lodoga; Sites-Lodoga road Comment
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  UCD81259  Malacothamnus fremontii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5424 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  RSA32810  Malacothamnus helleri A. A. Heller 1940-6-7 s.n. Colusa Near foot of grade east of Lodogo, on Sites-Lodogo Road Comment
  UCD83450  Malacothrix clevelandii Craig Thomsen; G. Harrington 2009-5-12 2826 Colusa Colusa County on Walker Ridge: About 200 yards south of spur road enroute to Eaton Springs from Walker Ridge Rd. ( About 1/2 mile east of Walker Ridge Road) 822 Comment
  CHSC112252  Malacothrix floccifera Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18627 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
  UC1212583  Malacothrix floccifera Francia Chisaki and Helen Sharsmith 1959-5-27 1336 Colusa 1.6 mi e Cooks Spring (on road to Cooks Spring); Inner North Coast Ranges Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  CAS-BOT-BC347386  Malacothrix floccifera Volney Rattan 1884-1-1 s.n. Colusa Unspecified 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
  CHSC86831  Malvella leprosa Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Drainage. 103 Comment
  CHSC88532  Malvella leprosa B. Castro; David Grant, Aric Lester 2003-9-29 1443 Colusa Vicinity of Antelope Valley, Antelope Creek and Huffmaster Road. On SSE-facing bank in sharp bend of creek. 160 Comment
  RSA140617  Malvella leprosa John H. Thomas 1960-8-30 8863 Colusa About 5 miles NW of College City along road to Sycamore. Comment
  RSA121079  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 miles S. of Colusa 15 Comment
  JEPS95245  Marah watsonii Steve Edwards 1996-4-26 Colusa Walker Ridge NE of Barrel Springs, on serpentinite scree visible immediately S of Brim Grade, E of Walker Ridge Road and not far below the latter in elevation Comment
  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
  UCD57553  Marrubium vulgare Andrew Pedersen; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  JEPS374  Marsilea vestita subsp. vestita W. L. Jepson 1934-7-28 16751 Colusa Williams 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
  UC1051742  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes) 762 Comment
  UCD107748  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Slopes of Little Stoney Creek, Mendocino National Forest. Inner north coast ranges. 762 Comment
  UCR212379  Medicago minima Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  SEINET255529  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCR206895  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UCR233452  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-4-1 17118 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCD107927  Medicago sativa Beecher Crampton 1963-8-5 6874 Colusa 3.5 miles south of Grimes. 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
  UCD87699  Melica californica Beecher Crampton 1958-5-19 4817 Colusa West of Lodoga. Comment
  SEINET11684249  Melica californica Unknown 1971-1 908 Colusa 3.3 mi N of Stony Ford on Elk Creek Road Comment
  CHSC101644  Melica geyeri var. geyeri David W. Isle 2003-6-3 1666 Colusa Mendocino National Forest; in meadow adjacent creek in Green Flat Campground; 1 mile N-NE of Horse Rock and 1.5 miles SE of Goat Rock. 1170 Comment
  CAS-BOT-BC247101  Melica torreyana Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  CHSC112269  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS121114  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  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
  UCD82587  Melica torreyana Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD88843  Melica torreyana Beecher Crampton 1958-5-19 4816 Colusa West of Lodoga. 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
  UCD72476  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3810 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  CDA16093  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa North Coast Ranges; Little Stony Creek 457 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
  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
  CHSC115628  Mentha canadensis David Isle; Terril Wolt 2014-9-24 2138 Colusa Northern Sacramento Valley Foothills: W side East Park Reseervoir, ~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
  JEPS80116  Mentzelia dispersa L. R. Heckard with J. Hickman 1980-7-1 5274 Colusa Flat at summit of East Peak. Snow Mt.; Colusa-Lake County Boundary 2148 Comment
  UCD117224  Mentzelia dispersa G. Ledyard Stebbins Jr. 1964-7-4 6168 Colusa Northeast side of Mt. St. John, west of Stonyford. 1524 Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  UCD117375  Mentzelia micrantha K. Esau 1934-5-6 s.n. Colusa above Williams Tahoe-Ukiah Highway. Comment
  CHSC87161  Micranthes californica Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 Comment
  UCD63030  Micranthes californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4682 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Eula Canyon. 313 Comment
  SEINET5710220  Micropus californicus Patricia Warne 1967-1 56 Colusa South end of Bear Valley by Bear Creek.; Bear Valley 390 Comment
  JEPS87665  Micropus californicus var. californicus Vernon H. Oswald and Lowell Ahart 1994-4-6 6067 B Colusa s. Stonyford (Goat Mt. Rd. at Sullivan Creek, 1.2 mi. s.w. of Digger Pine Flat); Sullivan Creek 469 Comment
  CHSC30421  Microseris douglasii J. D. Jokerst 1980-4-12 573 Colusa S of Hwy 20, 0.3 mi E of its jct with Hwy 16. Comment
  CHSC70968  Microseris douglasii subsp. douglasii Vernon Oswald; Lowell Ahart 1998-5-7 8999 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  CHSC81249  Microseris douglasii subsp. douglasii Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  CHSC86872  Microseris douglasii subsp. douglasii B. Castro 2003-4-3 1413 Colusa Vicinity of Sites, Golden Gate, and Funks Ck. 82 Comment
  JEPS124230  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  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
  UC92188  Microseris douglasii subsp. douglasii Brandegee April 1889 Colusa Comment
  CHSC86599  Microseris elegans Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  CHSC70969  Microseris sylvatica Vernon Oswald; Lowell Ahart 1998-5-7 8991 Colusa Lodoga-Leesville Rd. 4.3 mi south of Cooks Spring Rd. Roadcut. 469 Comment
  CHSC81250  Microseris sylvatica L. P. Janeway; B. Castro 2001-4-26 7028 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 286 Comment
  RSA46870  Mimulus aurantiacus var. aurantiacus Doris K. Kildale 1927-04 3244 Colusa [Unspecified] Comment
  JEPS80113  Mimulus breweri L. R. Heckard with J. Hickman 1980-7-1 5272 Colusa cirque se East Peak (ca. 10 mi w of Stonyford); Snow Mt. 1950 Comment
  JEPS13747  Mimulus douglasii Frank W. Gould 1939-4-7 628 Colusa just n County Line (on road from Knoxville to Rumsey) Comment
  RSA724956  Mimulus floribundus L. Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  HSC85824  Mimulus guttatus David Munger, Tallchief Comet, Jeff Dunk 1987-4-12 78 Colusa Bear Valley Comment
  JEPS121117  Mimulus guttatus Lowell Ahart 2013-5-1 18688 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS80382  Mimulus guttatus L. R. Heckard and J. Hickman 1981-6-22 5615 Colusa Dark Hollow Creek Snow Mt. 1889 Comment
  UCD57657  Mimulus guttatus Madeline Christopher; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road in Craig Creek. 323 Comment
  UCD82521  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2878 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  RSA34075  Mimulus guttatus A. A. Heller 1940-5-14 15619 Colusa 4 miles north of Maxwell. 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
  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
  UCD122648  Mimulus microphyllus R. A. Christison 1960-4-17 28 Colusa on road to Wilbur Springs, 2 miles north of State Highway 20. Comment
  UCD15288  Mimulus microphyllus Claire Warshaw 1985-4-13 6 Colusa along Bear Valley Road, 8 miles norhtwest from intersection with highway 20. 390 Comment
  UCD81724  Mimulus nasutus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5728 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  JEPS74812  Mimulus nudatus L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4020 Colusa just sw of site Old Kowalski ranch (below upper dam road, sw of Leesville); Upper Indian Valley 396 Comment
  UC886310  Mimulus nudatus Alice Eastwood, John Thomas Howell 1938-5-16 5636 Colusa on road to Williams (Lake-Colusa county line) Comment
  JEPS120638  Mimulus pilosus Lowell Ahart 2013-10-1 19072 Colusa Strand of East Park Reservoir, about 2.5 air miles southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 air miles northwest of Sites. Comment
  NY90769  Mimulus rattanii V. Rattan 06 1882 s.n. Colusa Above Font's Spr. Coast Mts. North of San Francisco Bay. Comment
  UCD81729  Mimulus rattanii Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5731 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  JEPS10517  Mimulus tricolor Ruth Johnson 1915-4-6 Colusa College City Comment
  IRVC29627  Minuartia Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5024 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  UC1613426  Minuartia douglasii Charles M. Belshaw 1937-4-25 2876 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD82137  Minuartia douglasii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5670 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  JEPS15565  Minuartia nuttallii subsp. gregaria G. Thomas Robbins with L. R. Heckard 1956-7-25 3716 Colusa slope above Dark Hollow Creek (a tributary of Middle Fork Stony Creek) (on s flank of mt., at lower edge of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. East 1981 Comment
  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
  UC1585895  Monardella odoratissima subsp. glauca Barbara Ertter 1989-7-1 8618 Colusa ca. 12 air mi wsw Stonyford (road to Goat Mt. Lookout 0.4 mi s of Rt. M-10 (Bear Creek-Fouts Spring Rd.) at head of creek); South Fork Stony Creek 1371 Comment
  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
  SEINET10582138  Monardella villosa A. Graff 1993-7-25 Graff 367 Colusa Bear Valley Rd., 2.2 miles north of Rte. 20, on right road cut. Locally infrequent on sandstone cliff, beneath Pinus coulteri, Quercus agrifolia, Arctostaphylos, sp. Past bloom. Comment
  UCD22648  Monardella villosa subsp. sheltonii Laura F. Galloway 1988-5-1 6 Colusa Leesville Road, 11.9 miles north of SR20. 487 Comment
  CAS-BOT-BC214163  Monardella villosa subsp. villosa Mark A. Elvin; David Isle; Mark S. Brunell 2006-8-3 4991 Colusa Mendocino Nat. Forest, E face of Snow Mtn., Stony Creek along M10, Southern Northern Inner Coast Ranges 609 Comment
  CHSC79521  Monardella villosa subsp. villosa B. Castro; L. P. Janeway 2000-5-4 1131 A Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 268 Comment
  CHSC94886  Monardella villosa subsp. villosa Lowell Ahart 2006-6-11 12672 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  IRVC29847  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4991 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  CHSC78236  Monolopia major Vernon H. Oswald 2000-4-20 9915 Colusa Bear Valley Road. 2.5 mi south of Rim Rd. (to Bartlett Springs). 402 Comment
  CHSC85973  Monolopia major Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  JEPS34930  Monolopia major Alice King May 1906 Colusa College City Comment
  JEPS35229  Monolopia major W. L. Jepson 1932-5-7 16254 Colusa valley above Venado 274 Comment
  UC1049535  Monolopia major Rimo Bacigalupi 1950-4-16 3118 Colusa just w Bear Valley (along base of grade (Bartlett Mt. road), near Colusa-Lake County line); Inner North Coast Ranges 426 Comment
  POM256988  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 427 Comment
  UCD86504  Muhlenbergia andina Craig Thomsen 2004-9-16 s.n. Colusa along Goat Mountain road. Comment
  UCD82631  Muhlenbergia asperifolia Jack Alderson 2009-8-6 27 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near confluence of Craig and Bear Creeks. 304 Comment
  UCD86698  Muhlenbergia filiformis G. Thomas Robbins; L. R. Heckard 1956-7-25 3707 Colusa South of Snow Mt. East and skirting the eastern base of the ridge forming Snow Mt. West. 1981 Comment
  CAS-BOT-BC83269  Myosurus minimus Roxana S. Ferris 1917-4-10 510 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83270  Myosurus minimus Roxana S. Ferris 1917-4-10 1441 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83273  Myosurus minimus Roxana S. Ferris 1918-4-10 1443 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83274  Myosurus minimus Herbert L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  UC1114806  Myosurus minimus Donald E. Stone Oct 26 1954-Sep 18 1955 7 -13 Colusa 3 mi e of city of Maxwell (on the Maxwell Road) Comment
  UCD18836  Myosurus minimus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 143 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CAS-BOT-BC83281  Myosurus minimus Alice Eastwood 1922-4-24 11188 a Colusa Road between Princeton and Norman. Colusa/Glenn county line. Comment
  POM312436  Myosurus minimus subsp. apus H. L. Mason 1953-4-5 14510 -a Colusa 3 miles east of Maxwell Comment
  UC1028302  Myosurus sessilis George B. Rossbach 1955-4-9 271 Colusa 3 mi e Maxwell (Sacramento Valley); Sacramento Valley 18 Comment
  CHSC110502  Myriophyllum hippuroides David Isle; Rhonda Isle, Charlie Lingerfelt 2011-8-24 1949 Colusa Stonyford Area Stony Creek Watershed. About 2.5 miles SE of Stonyford in coves of East Park Reservoir. 359 Comment
  UCD81889  Najas gracillima Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5773 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  UC1100011  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa 1.6 mi w of Williams (Road to Lake County) Comment
  CHSC100258  Nassella pulchra D. Isle 1988-4-13 1506 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  UCD57863  Nassella pulchra Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 48 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  UCD87475  Nassella pulchra Beecher Crampton 1958-4-21 4732 Colusa Along State Hwy. 16. 12 miles northwest of Rumsey. Comment
  UCD87543  Nassella pulchra Freed W. Hoffman 1942-4-23 2253 Colusa Near Maxwell. Comment
  UCD87673  Nassella pulchra D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCSB6643  Navarretia G. Keator 1958-6-17 S.N. Colusa JUST W OF BARTLETT SPRINGS Comment
  JEPS70256  Navarretia cotulifolia W. L. Jepson 1920-5-23 8965 Colusa near Leesville (foot of Bartlett Grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  CHSC76765  Navarretia eriocephala J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  RSA424699  Navarretia eriocephala Aaron Liston, M. A. Blumler 1987-4-26 668 -5 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CHSC76766  Navarretia heterandra J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 114 Comment
  CHSC88525  Navarretia heterandra B. Castro 2003-5-15 1440 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On N-facing side of small 'pass' in unnamed tributary to Lurline Ck. 195 Comment
  UC908879  Navarretia heterandra Herbert L. Mason 1946-5-30 12816 Colusa near Eppersons; Bear Valley 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
  UCD36308  Navarretia jepsonii Beecher Crampton 1949-9-25 494 F Colusa Colusa County, 18 miles east of Bartlett Springs. 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
  UCR261754  Navarretia jepsonii Ann Howald 2003-5-31 2360 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  CHSC94469  Navarretia leptalea subsp. leptalea Lowell Ahart 2006-8-9 13128 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC107942  Navarretia leucocephala subsp. leucocephala B. Castro; L. Janeway 2011-4-27 1866 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  UC23413  Navarretia nigelliformis J. Burtt Davy May 1898 4297 Colusa near Sites; Willows Comment
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Jul 27 2007
  CAS-BOT-BC230054  Navarretia pubescens Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5646 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 839 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  UCD72461  Navarretia pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3795 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  UCD82118  Navarretia pubescens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5646 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS105729  Navarretia tagetina David Gowen 2004-5-18 83 Colusa About 1.5 miles southeast of Stonyford at East Park Resevoir. Northwestern end, 1/3 mile W of the dam that drains to Little Stony Creek. Comment
  UCD57853  Navarretia tagetina Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 42 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
  UC1618098  Navarretia viscidula Donald G. Nelson 1940-6-9 Colusa Stoneyford 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
  JEPS80750  Nemacladus capillaris L. R. Heckard and J. C. Hickman 1981-7-29 5713 Colusa n of Summit Springs (n of road, s side of Snow Mt, Colusa-Lake county boundary); Snow Mt. 1539 Comment
  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
  SBBG126069  Nemophila heterophylla G. K. Helmkamp with E. A. Helmkamp 2009-3-11 14372 Colusa St Hwy 20, 14.3 mi SW of Williams 375 Comment
  UC72014  Nemophila heterophylla Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  UCD56937  Nemophila heterophylla Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3539 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UCD66587  Nemophila heterophylla Craig D. Thomsen 2000-4-12 2158 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS3136  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  UCSB23986  Nemophila menziesii Masero, Ann 1967-2-12 Colusa Along roadside of Wilber Springs Road; 1.4 miles south of Wilber Springs; in Northern inner Coastal Ranges 548 Comment
  UCD66962  Nemophila parviflora Ellen Dean; Davis Botanical Society 2008-5-31 5006 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  JEPS85842  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  UC1586079  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  UC595048  Nemophila pedunculata Annetta Carter 1938-5-8 1381 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC638658  Nemophila pedunculata Ethel Crum 1938-5-8 2025 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD63012  Nemophila pedunculata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4665 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  CHSC62851  Nicotiana glauca Vernon H. Oswald; Lowell Ahart 1994-3-23 6024 Colusa Goat Mtn. Rd. 1.8 mi W of Stonyford-Lodoga Rd., S of Stonyford. Between the road and Little Stony Creek. 487 Comment
  SEINET6174905  Nicotiana glauca R. R. Halse 2007-3-25 7123 Colusa Along State Hwy. 20 ca 7.8 miles NE of junction with State Hwy. 16 at base of Salt Canyon, 100 Comment
  CHSC101616  Nuttallanthus canadensis David W. Isle; Teal Richards 2002-4-18 1652 Colusa Mendocino National Forest. N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mountain). SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg. Study Plot. MDB and M. 524 Comment
  JEPS127817  Orobanche bulbosa Susan Fawcett 2014-5-13 226 Colusa Walker Ridge, near border of Lake and Colusa Counties. Comment
  CHSC71441  Orobanche californica subsp. jepsonii Vernon H. Oswald; Lowell Ahart 1998-7-15 9274 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. Along the edge of a meadow. 524 Comment
  SEINET4854289  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton. Comment
  SEINET8854072 Image available Orobanche grayana var. jepsonii H. P. Chandler 1905-1 s.n. Colusa Princeton Comment
  CAS-BOT-BC502948  Orobanche vallicola Roxana Stinchfield 1916-7-12 475 Colusa Sycamore Slough Comment
  RSA516500  Orthocarpus lithospermoides var. bicolor W. L. Jepson 1938-6-9 18964 Colusa Mts. between Indian Valley and Bear Valley. Btw. Lake Co. and Colusa Co. Comment
  RSA424698B  Orthocarpus purpurascens Aaron Liston, M. Blumler 1987-4-26 667 -8 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD88428  Oryza rufipogon P. B. Kennedy 30-31 May 1922 s.n. Colusa Cortina. 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
  JEPS73443  Osmorhiza occidentalis L. R. Heckard 1972-7-8 3038 Colusa near summit ridge se West Peak (Lake-Colusa Co. boundary); Snow Mt. 2072 Comment
  UCD70305  Packera breweri D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  CAS-BOT-BC316836  Packera clevelandii Dennis E. Breedlove 1963-5-30 5182 Colusa 17 miles E of Bartlett Springs Comment
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Apr 25 2021
  CHSC88565  Packera clevelandii L. P. Janeway; B. Castro 2001-6-3 7103 Colusa Inner North Coast Ranges. At Buck Flat: east side of Walker Ridge at head of Gaither Canyon; about 1.3 km south-southeast of Baldy Mountain. Meadow. 872 Comment
  JEPS95998  Packera clevelandii Vernon H. Oswald and L. Ahart 1999-6-22 9783 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  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
  CAS-BOT-BC316930  Packera greenei Ella D. Cantelow 1957-5-31 s.n. Colusa 4 mi. west of Leesville on grade above Bear Valley Comment
  CAS-BOT-BC253663  Panicum capillare Roxana Stinchfield 1916-7-10 479 Colusa Davis Tule near Sycamore Slough 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
  CHSC94428  Panicum capillare Lowell Ahart 2006-8-22 13222 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS120709  Panicum capillare Lowell Ahart 2013-10-1 19100 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
  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
  UC1101588  Panicum capillare Herbert L. Mason 1945-9-19 12719 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink Comment
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  UCD89786  Panicum capillare subsp. hillmanii Beecher Crampton 1969-6-18 8457 Colusa 1.5 miles south of Williams. Interstate Hwy. 5 northbound. Comment
  UCD88609  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa 2 miles east of Maxwell. Comment
  RSA654746  Parnassia palustris var. californica G. Fred Hrusa 1994-11-7 11992 Colusa Frenzel Creek Research Natural Area. USFS. Little stony Creek at mouth of Frenzel Creek, approx. 2 miles above Stonyford-Lodoga Road. On Goat Mountain Road. 440 Comment
  UC1027193  Parvisedum pentandrum Herbert L. Mason 1953-5-4 Colusa Little Stony Creek Road 0.25 mi above junction of Little Stony Creek and Trout Creek (Inner North Coast Ranges); , Little Stony Creek Road 609 Comment
  JEPS110214  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
  POM198505  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Williams Road-the 'Trough' Comment
  RSA724980  Paspalum distichum L. Ahart 2006-9-26 13352 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UCD66918  Paspalum distichum Craig D. Thomsen; G. Harrington 2008-7-6 2780 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  UCD88914  Paspalum distichum K. Esau; D. Hartmann 1941-7-17 s.n. Colusa near Williams. Comment
  UCR225658A  Paspalum distichum Craig D. Thomsen, Gordon Harrington 2008-7-6 2780 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  UC1613496  Pectocarya penicillata Charles M. Belshaw 1937-4-25 2840 Colusa vicinity of Cook's Spring (Inner North Coast Ranges, Devil's Ridge); Inner North Coast Ranges, Devil's Ridge Comment
  UC766200  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  UCD57114  Pectocarya pusilla Gordon Harrington; Diana Hickson 2007-4-7 0018 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  CHSC62850  Pedicularis densiflora Vernon H. Oswald 1994-3-23 6012 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  CHSC84651  Pedicularis densiflora Matt Quinn 2001-3-31 33 Colusa Found on Walker Ridge, north of Highway 20 between Bear Valley and Clear Lake, at the top of the road leaving Bear Valley. On ridgetop. 664 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
  RSA401941B  Pedicularis densiflora Terry Roth 1979-4-14 9 Colusa [No location data on label] 1067 Comment
  UCD84548  Pediomelum californicum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6146 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  JEPS86608  Pellaea L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6711 Colusa 0.5 mi ne Summit Springs; sw flank Snow Mt 1650 Comment
  HSC94208  Pellaea andromedifolia D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 22 Colusa On Brim Rd. 1.6 mi. W of Jct. with Bear Valley Rd. 488 Comment
  JEPS86609  Pellaea brachyptera L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6713 Colusa 0.5 mi. n.e. Summit Springs (s.w. flank of Snow Mt.); Colusa-Lake Co. Line, Snow Mt. 1650 Comment
  RSA590198  Pellaea mucronata Michael A. Vincent, Robert Road 1996-3-30 7281 Colusa Along Bear Valley Road above Bear Creek, 1.4 miles south junction Wilber Springs Road. Comment
  UCD70232  Pellaea mucronata D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 350 Comment
  CHSC1851  Penstemon centranthifolius E. Walker 1932-4-18 Colusa Stonyford. 365 Comment
  UCR37571  Penstemon heterophyllus Michelle A. Strull, Et al. 1984-4-28 12 Colusa Brim Road 1.6 mi west of Leesville-Lodoga Jct. 419 Comment
  SEINET12327201  Penstemon heterophyllus C. C. Freeman, Wetter, M. A. 1983-1 1891 Colusa 2.2 mi NNE of the jct of CA 20 & 16 in the foothills of the Sierra Cascades Comment
  HSC97535  Penstemon heterophyllus subsp. heterophyllus J. Carey, A. Hong, J. Leffingwell 1995-5-7 89 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  POM231385  Penstemon heterophyllus subsp. purdyi M. S. Baker 1937-5-17 8659 Colusa Hwy 20, soon after entering hills from Williams. Comment
  NY601769  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Above Salt Creek, Lower Lake-Williams road, 11 miles northeast of Lake-Colusa line, Inner North Coast Ranges. 152.4 Comment
  CDA20255  Penstemon heterophyllus var. purdyi G. D. Barbe, Nola Parmer 1982-6-4 3636 B Colusa North Coast Ranges; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  NY601742  Penstemon heterophyllus var. purdyi J. C. Clausen 1935-5-20 1015 Colusa 18 miles west of Williams on the Bartlett Springs road. Comment
  UCD124198  Penstemon purpusii A. M. Shapiro 1994-6-12 s.n. Colusa at road junction just below summit of Goat Mountain. 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
  SEINET7929202  Perideridia kelloggii K. Morris, Conrad; Dunn 1973-6-6 379 Colusa On Hwy 20, 0.3 mi E of Lake County Line.; 0 Comment
  UCR261734  Perideridia kelloggii Ann Howald 2003-5-30 2357 A Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  JEPS73489  Perideridia oregana L. R. Heckard 1972-7-9 3101 Colusa East Peak Snow Mt. (scree slope on se slope) 2011 Comment
  JEPS80375  Perideridia oregana L. R. Heckard and J. Hickman 1981-6-22 5608 Colusa East Peak Snow Mt. (s side of e ridge) 1950 Comment
  CHSC107483  Persicaria amphibia Jeanne Pendell 2010-7-17 1918 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East arm of East Park Reservoir, in the lake. 365 Comment
  UCD99460  Persicaria lapathifolia H. R. Drever 1945-8-24 s.n. Colusa Near Grimes. Comment
  CHSC94698  Persicaria maculosa Lowell Ahart 2006-9-26 13354 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  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
  UC1228357  Phacelia corymbosa L. R. Heckard and G. T. Robbins 1956-7-24 816 Colusa about 1/2 mi s summit; Snow Mountain 2042 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
  CHSC12767  Phacelia divaricata L. V. Ritter 1969-4-30 235 Colusa Ca. 100 yds. w of the junction of Highway 20 and 16, ca 50 yds. n of Highway 20. Comment
  UCD63016  Phacelia divaricata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek. 358 Comment
  POM287455  Phacelia divaricata Lyman Benson 1933-4-16 4326 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  UC73693  Phacelia egena Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC47567  Phacelia imbricata Sheila Logan 1978-4-22 67 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC66010  Phacelia imbricata Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 45 Colusa 5.4 mi. from Lodoga along little Stony Creek at Digger Pine Campground Comment
  UC1609379  Phacelia imbricata Vernon H. Oswald and Lowell Ahart 1993-5-27 5430 Colusa Sites-Lodoga Rd ca 0.4 mi w Grapevine Pass (4.6 road mi e of Lodoga) 481 Comment
  JEPS81284  Phacelia imbricata subsp. imbricata L. R. Heckard and J. C. Hickman 1982-7-5 5895 Colusa slope below (s) Summit Springs (s side of mt.); Snow Mt. 1500 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
  HSC69910  Phacelia tanacetifolia Thomas W. Nelson, Jane P. Nelson 1978-4-2 3876 Colusa Along Bear Valley Rd., 2 mi. N of Jct. with Hwy. 20 Comment
  JEPS1305  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  UCD82733  Phacelia tanacetifolia Craig Thomsen; G. Harrington 2009-5-14 2914 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC45512  Phacelia tanacetifolia M. Alcasas 1978-4-22 48 Colusa Bear Valley Rd., 2.3 mi. from Hwy. 20 419 Comment
  UCD66920  Phalaris aquatica Craig D. Thomsen; G. Harrington 2008-7-6 2779 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  UCR225399  Phalaris aquatica Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5100 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon, just south of junction with trail that leads east to Brophy Canyon and Thompson Creek 488 Comment
  UC50462  Phalaris paradoxa J. Burtt Davy May, 1898 4264 Colusa near Princeton; near Princeton Comment
  UCD67056  Phalaris paradoxa Craig D. Thomsen 2008-5-23 2750 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 420 Comment
  UCR206397  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14370 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  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
  JEPS80199  Phoradendron libocedri L. R. Heckard and J. Hickman 1980-7-3 5354 Colusa n. side of rd. across from Summit Springs (Snow Mt., Colusa-Lake Co. boundary); Snow Mt. Comment
  JEPS80242  Phoradendron villosum L. R. Heckard and J. Hickman 1980-7-3 5403 Colusa near Summit Springs (Snow Mt.); Snow Mt. Comment
  JEPS24655  Physalis lancifolia J. H. Thomas 1960-8-30 8866 Colusa about 5 mi nw of College City (along road to Sycamore) Comment
  POM312948  Pilularia americana G. Thomas Robbins, S. Galen Smith 1950-4-15 1905 Colusa Colusa County: In wet mud and vernal pool, Bear Valley 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
  UCD57447  Pinus sabiniana Gina Darin; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  JEPS80465  Piperia colemanii Alice Q. Howard 1972-7-10 9 Colusa trail from Fouts Camp to Box Springs (the highest of two such areas on the n side of ridge separating Trout and Paradise Creeks); Snow Mountain 1676 Comment
  CAS-BOT-BC242677  Piptatherum miliaceum Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  CHSC107949  Pisum sativum B. Castro; T. Boullion 2011-4-20 1847 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 0.3 mi east of bend in Tehama-Colusa Canal. In grassy uplands north of large +- saline/alkaline wetland/marsh and associated vernal swales, just south of east-west fence bordering grain fields. 49 Comment
  RSA730246  Plagiobothrys canescens R. R. Halse 2007-3-22 7106 Colusa Williams; by junction of 5th Street and B Street. 25 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
  UCR261674  Plagiobothrys distantiflorus Ann Howald 2003-3-12 2281 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2.1 miles southeast of Stonyford, near diversion canal inflow to reservoir 369 Comment
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  UCD163215  Plagiobothrys fulvus var. campestris Craig D. Thomsen 2000-3-31 2167 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
  UCD163690  Plagiobothrys fulvus var. campestris Craig Thomsen 1999-4-15 1992 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UC78155 Image available Plagiobothrys humistratus Katharine Brandegee 1888-4 Colusa Colusa Junction Comment
  UCD120840  Plagiobothrys humistratus Robert E. Preston 1995-6-2 868 Colusa Bear Valley Road. Comment
  POM174576  Plagiobothrys infectivus Roxana S. Ferris 1926-4-23 6412 Colusa Near Mountain House on the Williams-Stonyford Road. Comment
  CHSC89859  Plagiobothrys scriptus B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1212 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. 91 Comment
  UC78102  Plagiobothrys shastensis unknown May 1886 Colusa Stites Comment
  RSA10707  Plagiobothrys stipitatus C. B. Wolf 1928-5-8 2124 Colusa Sacramento Valley. 3 mi. S of Arbuckle Comment
  UC71649  Plagiobothrys stipitatus Miss Alice King 1905-1 Colusa College City Comment
  CDA32833  Plagiobothrys stipitatus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  POM287611  Plagiobothrys stipitatus Lyman Benson 1935-3-27 6340 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  POM63664  Plagiobothrys stipitatus var. micranthus Roxana S. Ferris 1917-4-12 534 Colusa 4 miles east of Williams. Comment
  SD28155  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2124 Colusa 3.0 miles south of Arbuckle 42 Comment
  UCD163319  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD58097  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3474 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
  UCR212317  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2096 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CHSC29720  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-1 6617 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC62922  Plagiobothrys tenellus Vernon H. Oswald; Lowell Ahart 1994-4-6 6069 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
  HSC31306  Plagiobothrys tenellus Carter Schleicher 1974-5-4 23 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS20848  Plantago coronopus B. Crampton 1953-5-7 1219 Colusa 4 mi n Williams Comment
  JEPS20849  Plantago coronopus B. Crampton 1953-4-29 1144 Colusa about 2 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
  CHSC112257  Plantago erecta Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18632 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
  CHSC115396  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC81283  Plantago erecta J. Trizzino 2001-3-31 18 Colusa Bear Valley Meadow along east side of Bear Balley Road. 396 Comment
  RSA424754  Plantago erecta Aaron Liston, M. Blumler 1987-4-26 668 -3 Colusa East Park Reservoir, 3.2 miles E of Stonyford 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
  UCD82465  Plantago erecta Craig Thomsen; G. Harrington 2009-5-12 2842 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  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
  SD147976  Plantago erecta L. Coats 1983-4-24 6 Colusa In the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road. 487 Comment
  UCD124495  Plantago erecta J. M. Tucker 1960-4-3 3583 Colusa 1/4 mile west of road, 7.5 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  CHSC94449  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110111  Plantago major Lowell Ahart 2006-8-9 13152 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC23473  Platystemon californicus S. R. Poe 1974-3-30 29 Colusa In fields adjacent to highway 20, 22.5 mi. w of williams. Comment
  UC125224  Platystemon californicus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  UCR52384  Platystemon californicus R. Earing, C. Cavanaugh, C. Collins 1987-4-12 80 Colusa Bear Valley Comment
  CAS-BOT-BC6406  Platystemon californicus Mary Katherine (Mrs.) Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  SEINET5718795 Image available Platystemon californicus Lois Goodman 1969-1 1 Colusa 9.5 miles north of State Hwy 20. Comment
  UCD13217  Platystemon californicus Steve Daniel 1986-4-13 10 Colusa California. Colusa Co. Bear Valley, 7.6 mi No of jct of Bear Valley Rd. and hwy 20. Elev. ca. 1300 ft. 396 Comment
  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
  UCD96066  Platystemon californicus Linda Osbourne 1980-4-12 12 Colusa 0.3 mile west of junction of Highways 20 and 16, south side of Bear Creek, 16 miles SW of Williams. 321 Comment
  CHSC115381  Platystemon californicus var. californicus Lowell Ahart 2015-4-1 20002 Colusa Along Bear Valley Road, in Bear Valley, about 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Inner North Coast Range. 395 Comment
  CDA34081  Plectritis ciliosa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC999845  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 683 Colusa near Williams Comment
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County Comment
  CHSC86883  Plectritis macrocera B. Castro; Beth Hendrickson 2003-3-24 1400 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 268 Comment
  JEPS16087  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  UC999826  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 693 Colusa near Williams Comment
  UCD13382  Plectritis macrocera Charles Martin 1986-5-17 33 Colusa Mendocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service Rd. 18NO1 on Forest Service Rd.17 NO2. Comment
  UCD57103  Plectritis macrocera Gordon Harrington; Diana Hickson 2007-4-7 0016 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UC999822  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 696 Colusa south central Colusa County Comment
  UCD41210  Plectritis macrocera John Snelling 1986-5-17 3 - Colusa Mill Valley campsite off of Forest Service Road 18N01. Comment
  SEINET3287538 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2009-1-31 14322 Colusa Sacramento Valley; Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa. 16 Comment
  UCR206852  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-11 14360 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  CHSC27859  Poa bulbosa Dieter D. King 1978-1-2 Colusa Salt Canyon n side of Salt Creek, Hwy 20 11 mi wsw of Williams. 128 Comment
  HSC41006  Poa bulbosa J. P. Smith, Thomas W. Nelson 1976-4-14 8579 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD64418  Poa bulbosa Craig D. Thomsen 2000-3-11 2166 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
  UCR233446  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17120 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCD82719  Poa pratensis Craig Thomsen; G. Harrington 2009-5-14 2902 Colusa Colusa County on Walker Ridge: Probably from Eaton Springs about one mile east of Walker Ridge Road. Comment
  UCD163705  Poa secunda Craig Thomsen 1999-5-10 2017 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  CHSC112213  Poa secunda subsp. secunda Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18643 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  UCD20204  Poa secunda subsp. secunda J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 16 miles N of junction of Hwys 20 and 16. Comment
  POM62478  Pogogyne douglasii Roxana Stinchfield 1916-7-11 448 Colusa Colusa - Williams Road at Trough Comment
  CHSC71641  Pogogyne zizyphoroides Michael A. Wolder 1988-5-12 Colusa Colusa National Wildlife Refuge south west of Colusa. At the edge of a seasonal wetland in Tract 20, Cell 1. 16 Comment
  CHSC115624  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern Sacramento Valley Foothills: North side of Maxwelll Road, about 2 miles W of Sites and 5.8 miles E of summit ofMaxwell Grade. Comment
  UCD77929  Polanisia dodecandra subsp. trachysperma Robert E. Preston 1999-9-24 1244 Colusa Along Highway 162, 2 miles W of Tehama Colusa Canal. 91 Comment
  JEPS80203  Polygonum douglasii subsp. douglasii L. R. Heckard and J. Hickman 1980-7-3 5358 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  JEPS75842  Polygonum minimum L. R. Heckard 1974-9-10 3902 Colusa West Peak Snow Mt. (ne slope) 2103 Comment
  JEPS110387  Polygonum persicaria Lowell Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CDA28167  Polypogon interruptus L. Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. Comment
  CHSC94413  Polypogon maritimus Lowell Ahart 2006-8-9 13171 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD72472  Polypogon maritimus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3806 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  UCD91185  Polypogon maritimus Beecher Crampton 1958-5-19 4810 Colusa West of Lodoga. Little Stony Creek. Comment
  POM206735  Polypogon monspeliensis A. A. Heller 1902-5-19 5570 Colusa Near Colusa. Comment
  SD225721  Polypogon monspeliensis Carol Witham, Jennifer Buck 2001-4-30 149 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  CHSC116671  Polystichum munitum Lowell Ahart; John Dittes, Joseephine Guardino 2016-2-14 20720 Colusa On the east side of the gravel 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
  RSA724221  Populus fremontii Richard R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  SEINET10333351  Populus fremontii R. R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  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
  UCR225398  Potamogeton pusillus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5108 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
  UC1607563  Potentilla drummondii Barbara Ertter with Elizabeth Neese 1989-7-2 8627 Colusa ca. 11 air mi due w Stonyford (Long Glade s of Milk Ranch just w of Snow Mt. West); just w Snow Mt. West 1956 Comment
  RSA666315  Potentilla drummondii Barbara Ertter 1989-7-2 8627 Colusa Long Glade, a V shaped meadow S of Milk Ranch just W of snow Mt West, about 11 airmiles due W of Stonyford. 1957 Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  UCD67100  Prunus emarginata Ellen Dean; Davis Botanical Society 2008-5-31 5027 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  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
  JEPS108724  Pseudognaphalium californicum Lowell Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  UCD159336  Pseudognaphalium californicum D. S. Park; E. Dean 2010-6-5 120 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  CHSC113053  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 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
  CHSC94451  Pseudognaphalium luteoalbum Lowell Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD58168  Pseudognaphalium luteoalbum Gordon Harrington 2007-5-15 58 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  CAS-BOT-BC357551  Pseudognaphalium stramineum Roxana Stinchfield 1916-7-8 372 Colusa Sycamore Slough-Stinchfield Ranch Comment
  UCD36225  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CHSC107119  Psilocarphus brevissimus var. brevissimus L. P. Janeway; B. Castro 2011-4-27 10241 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. On bare ground in re-vegetating old vehicle tracks through north edge of the marsh. 49 Comment
  JEPS40460  Psilocarphus brevissimus var. brevissimus W. L. Jepson 1934-5-3 16598 Colusa College City Comment
  CAS-BOT-BC361830  Psilocarphus oregonus L. R. Abrams 1928-5-8 12589 Colusa 2 miles south of Arbuckle Comment
  CHSC115395  Psilocarphus oregonus Lowell Ahart 2015-4-10 20008 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC60658  Psilocarphus oregonus Vernon H. Oswald 1993-4-14 5268 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. On top of a levee road branching off of the S leg of the tour route. 18 Comment
  UC1601291  Psilocarphus oregonus T. S. Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC361876  Psilocarphus tenellus Roxana S. Ferris 1917-4-12 526 Colusa 4 miles east of Williams Comment
  JEPS124212  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  JEPS75721  Psilocarphus tenellus L. R. Heckard 1974-9-9 3853 Colusa just se Foutch Camp; Snow Mountain 1889 Comment
  UC638695  Psilocarphus tenellus Ethel Crum 1938-5-7 2010 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCD163706  Psilocarphus tenellus Craig Thomsen 1999-5-10 2018 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CHSC79691  Psilocarphus tenellus var. tenellus L. P. Janeway; B. Castro 2000-5-1 6687 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  CHSC79346  Pterostegia drymarioides B. Castro; L. P. Janeway 2000-4-10 1064 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 121 Comment
  HSC45682  Pterostegia drymarioides Sheila Logan 1978-4-22 63 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1738833  Puccinellia simplex Dean W. Taylor 1988-3-24 9462 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles North of Ware Road 24 Comment
  JEPS80783  Pyrola dentata L. R. Heckard and J. C. Hickman 1981-7-30 5756 Colusa Trout Creek, southeast side of Snow Mountain 1600 Comment
  RSA0080624  Pyrola dentata Barbara Ertter 1989-7-1 8593 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  CDA15472  Quercus berberidifolia G. F. Hrusa, T. D. Wilfred 1998-6-19 14609 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC90879  Quercus chrysolepis D. Isle 2003-6-25 215 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. 1767 Comment
  UCD144417  Quercus chrysolepis G. F. Hrusa 1998-10-28 14897 Colusa Inner North Coast Ranges. Above Fouts Springs. Through Springs Road mile 2.7. 750 Comment
  UCR225266  Quercus chrysolepis Ellen Dean, Davis Botanical Society 2008-5-31 5032 Colusa west of Hwy I-5 at Maxwell, near summit lookout of Goat Mountain, at end of Goat Mountain Road, western part of ridges below lookout just off the road 1725 Comment
  SD197785  Quercus douglasii G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along River Road (generally following the Sacramento River), 1.1 miles north of Colusa. 17 Comment
  UC993120  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993123  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  SEINET13953272 Image available Quercus dumosa J. Major, E. Dahl 1962-1 Colusa Bear Valley Comment
  UCD41209  Quercus durata John Snelling 1986-5-17 3 - Colusa 5.7 mi. west of Stoneyford along Fouts Spring Road. Comment
  UCD55461  Quercus durata Ellen Dean; Gordon Harrington 2006-10-6 3285 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  UCD57325  Quercus durata Amy Whitcomb 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 563 Comment
  UCD84514  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6065 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCR52364  Quercus durata L. Blackford, S. Branch, D. Malm 1988-4-16 62 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  CHSC105193  Quercus durata var. durata B. Castro; L. P. Janeway 1999-7-5 1016 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  HSC71306  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4620 Colusa Along Stony Creek below Digger Pine Campground Comment
  HSC71309  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4617 Colusa Along Stony Creek below Digger Pine Campground Comment
  UC1299701  Quercus garryana Freed W. Hoffman 1948-6-26 2517 Colusa n side Goat Mt. (near forks of Stonyford and Goat Mt. roads, w Colusa County) 1653 Comment
  JEPS75761  Quercus garryana var. breweri L. R. Heckard, and R. Bacigalupi 1976-9-6 4450 Colusa Fouts Camp-Summit Spring trail Snow Mt. 1615 Comment
  UC1051744  Quercus kelloggii Helen K. Sharsmith 1953-6-20 4300 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  CAS-BOT-BC61587  Quercus lobata Roxana S. Ferris 1917-4-17 630 Colusa Sycamore Slough, near Sycamore Comment
  RSA749734  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  RSA758621  Quercus lobata George K. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UCR201775  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UCR205170  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14251 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SEINET13953521 Image available Quercus lobata L. Blackford, S. Branch, D. Malm 1988-1 79 Colusa 4 mi W on Goat Mt. Road off Lodoga-Stonyford Road in meadow 457 Comment
  RSA623529  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  SFV17753  Quercus palmeri R. Raiche 1990-12-2 s. n. Colusa Acoss Sulphur Creek from Wilber Springs. Comment
  UCD14525  Quercus palmeri Roger Raiche 1990-12-2 B Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  CAS-BOT-BC104659  Quercus wislizeni L. Blackford; S. Branch; D. Malm 1988-4-16 63 Colusa 13.8 miles of Hwy. 20 on Walker Ridge Road 975 Comment
  CAS-BOT-BC104660  Quercus wislizeni Roxana S. Ferris 1917-4-14 593 Colusa 5 mi W of Arbuckle along Sand Creek, Arbuckle-Rumsey Road Comment
  CAS-BOT-BC234979  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6064 Colusa On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat 971 Comment
  CDA15554  Quercus wislizeni var. frutescens G. F. Hrusa 1998-11-7 14905 Colusa North Coast Ranges; Above Fouts Springs on Trough Springs Rd. mi. 2.7. Comment
  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
  UCR225462  Quercus wislizeni var. frutescens Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5116 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail 548 Comment
  JEPS121102  Rafinesquia californica Lowell Ahart 2013-5-1 18670 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
  RSA275336  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  UC1745757  Ranunculus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1390 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  JEPS81342  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  UCD66942  Ranunculus aquatilis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5091 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
  CHSC100252  Ranunculus californicus David Isle 1990-6-6 1521 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  CAS-BOT-BC378937  Ranunculus californicus var. californicus Roxana Ferris 1926-4-21 6296 Colusa abandoned rice field 2 mi west of Colusa Comment
  POM163507  Ranunculus californicus var. rugulosus Roxana S. Ferris 1926-4-21 6296 Colusa Colusa County: abandoned rice field, 2 miles W of Colusa Comment
  UCR206701  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-17 14391 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  SEINET8696617  Ranunculus canus var. canus R. R. Halse 2013-3-26 8740 Colusa Along the Leesville Road, ca. 5.6 miles NW of its junction with CA Hwy 20, W of Williams. 157 Comment
  SEINET8699529  Ranunculus hebecarpus R. R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca 5.6 miles NW of its junction with CA Hwy 20, W of Williams. 157 Comment
  UC72903  Ranunculus hebecarpus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD163875  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2453 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  UCD163876  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2464 b Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  UCD65635  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2141 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  RSA268199  Ranunculus occidentalis var. eisenii Lyman Benson 1935-3-27 6327 Colusa 3 miles E of Lake County line Inner N coast, Sacramento River, Ukiah-Tahoe 610 Comment
  SBBG83437  Ranunculus orthorhynchus var. bloomeri C. C. Shock 1980-5-3 62 Colusa Bear Valley, ca. 12 mi NW of State Hwy 20 384 Comment
  UCD97058  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins; S. Galen Smith 1950-4-15 1907 Colusa Bear Valley. Comment
  RSA730245  Raphanus raphanistrum R. R. Halse 2007-3-22 7104 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCR206871  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2009-1-31 14318 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  POM332451  Rhamnus californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3961 Colusa Along Bear Valley Rd., 2 miles from jct with Hwy 20. 366 Comment
  SEINET13946282 Image available Rhamnus californica A. A. Heller 1916-1 12360 Colusa Coast Range on the grade about 3 mi W of Leesville 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
  RSA28824  Rhamnus tomentella subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade 3 miles W of Leesville. 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
  CDA40545  Rhamnus tomentella subsp. crassifolia P. S. Crane 1979-8-14 s.n. Colusa 4 miles west of Ladoga Road on Goat Mountain. 0 Comment
  JEPS95999  Rhododendron occidentale Vernon H. Oswald and L. Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate. Shrub on the rocky bank of Little Stony Creek. 426 Comment
  UCD117941  Rhododendron occidentale George F. Hrusa 1989-5-5 6066 Colusa Open margin of Little Stony Creek, along Rd. to Cedar Camp. 1.5 m. SW of intersection of Stonyford-Lodoga Rd. 470 Comment
  UCD117976  Rhododendron occidentale A. T. Leiser 1985-5-19 LO Colusa Between 3-4 miles along Frenzel Creek as it parallels the road M5 from Lodoga to Goat Mtn. Frenzel Creek is on S. side of road and down 30-40 ft. Populations are scattered in full sun on both sides of the creek. Comment
  UCD20700  Rhododendron occidentale A. T. Leiser 1985-5-19 LO Colusa Between 3-4 miles along Frenzel Creek as it parallels the road M5 from Lodoga to Goat Mtn. Frenzel Creek is on S. side of road and down 30-40 ft. Populations are scattered in full sun on both sides of the creek. Comment
  HSC62926  Rhus aromatica Marla J. Carollo 1979-4-14 26 Colusa Buch Flat on Walker Ridge Rd. 884 Comment
  HSC71304  Rhus aromatica Thomas W. Nelson, Jane Nelson 1979-4-12 4622 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD116923  Rhus aromatica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. At Stoney Creek. 450 Comment
  POM174573  Rhus trilobata var. quinata Roxana S. Ferris 1926-4-23 6590 Colusa 2 miles from Stony Ford. Comment
  UC1299689  Ribes binominatum Freed W. Hoffman 1948-6-26 2513 Colusa n side Goat Mountain (Colusa Lake county line) 1630 Comment
  JEPS75853  Ribes lobbii L. R. Heckard 1974-9-10 3901 Colusa ne slope West Peak; Snow Mt. 2103 Comment
  CHSC89876  Ribes malvaceum B. Castro; L. Janeway 2001-5-3 1245 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In dry creekbed. Near junction of this side-cyn with dirt road paralleling N-S-trending perennial creek 365 Comment
  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
  CHSC90878  Ribes roezlii D. Isle 2003-6-24 214 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. UTM's: 10S 0523825E 4346753N. 1767 Comment
  SFV14515  Ribes roezlii M. L. Vincent 1968-6-6 786 Colusa Goat Mountain Road, 1 mile from Stony Ford turnoff. 1825 Comment
  UCR246379  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest, Dixie Glade Campground 918 Comment
  RSA0024715  Ribes roezlii J. M. Tucker 1959-5-30 3524 Colusa Ca. 1.25 miles northwest of Goat Mountain Lookout, Goat Mountain. 1768 Comment
  CAS-BOT-BC362903  Rigiopappus leptocladus Roxana S. Ferris 1926-4-23 6589 Colusa Near Stonyford 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
  UC638693  Rigiopappus leptocladus Ethel Crum 1938-5-7 2012 Colusa 4.2 mi n Rumsey (Comanche Hills, summit of ridge); Inner North Coast Range, summit of ridge, Comanche Hills 254 Comment
  UC75806  Rigiopappus leptocladus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD163332  Rigiopappus leptocladus Craig D. Thomsen 2009-5-3 2801 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD65630  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 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
  CHSC84962  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
  CHSC85959  Rosa californica Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UC72992  Rosa californica H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD63733  Rosa californica Craig D. Thomsen 2008-5-23 2743 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 421 Comment
  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
  SEINET8723619 Image available Rosa gymnocarpa Helen K. Sharsmith 1953-1 4405 Colusa Near Old Mill Camp, Trough Springs Ridge, Mendocino National Forest. 1036 Comment
  CAS-BOT-BC421589  Rumex crispus Roxana S. Ferris 1926-4-22 6284 Colusa 3 miles west of Colusa 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
  UCR146703  Sagittaria June McCaskill, Et al. 1954-8-9 363 Colusa c. 1 mi east of Princeton and 500 yds. south of Glenn County line 23 Comment
  UCD18528  Sagittaria June McCaskill; with Mr. Harvey and Loren Davis 1954-8-9 363 Colusa ca.1 mi. east of Princeton and 500 yds. south of Glenn County line. Comment
  POM313039  Sagittaria calycina H. L. Mason, Verne Grant 1946-8-6 12961 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of Sacramento River. Comment
  UCD138022  Sagittaria longiloba June McCaskill 1954-8-9 367 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CAS-BOT-BC445795  Sagittaria montevidensis Milo S. Baker 1946-9-5 11632 Colusa Along Hiwy. between Colusa and Williams Comment
  UC935749  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-7 12981 Colusa Butte Sink; eight mi n of Colusa Comment
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CHSC78975  Salicornia subterminalis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9979 Colusa Colusa National Wildlife Refuge. On the west side of Powell Slough 0.25 mi south-southwest of Refuge Headquarters. 15 Comment
  CHSC78976  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge. 15 Comment
  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
  CHSC75757  Salix breweri Vernon H. Oswald; Lowell Ahart 1999-6-22 9786 Colusa 1.5 mi west of Stonyford-Lodoga Road 42 paralleling Little Stony Creek. 426 Comment
  UCD163647  Salix breweri Craig Thomsen 1998-6-19 1943 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  UCD57307  Salix breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3678 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  UCD81722  Salix breweri Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5726 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
  CHSC80068  Salix gooddingii L. P. Janeway; B. Castro 2000-4-10 6662 Colusa Vicinity of Lurline Creek and Sulphur Gap. 91 Comment
  CAS-BOT-BC104037  Salix hindsiana Roxana S. Ferris 1917-4-17 619 Colusa Sycamore Slough Comment
  UCD111125  Salix laevigata G. F. Hrusa 1996-2-26 12631 Colusa Approx. 5 m. NW of Hwy. 20 along Leesville Rd. W of Oat Valley at S end of Boxer Valley. 200 Comment
  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
  UCD16133  Salix laevigata G. Robinson 1984-4-21 8 Colusa California. Colusa County: Bear Valley, 3.3 mi N of hwy 20, about 80-90 m W of Wilbur Springs Rd., top of rise above creek flood plain. 390 Comment
  UCD164151  Salix laevigata Craig Thomsen 2000-3-31 2045 Colusa Bear Creek Canyon. About 5 miles north of Hwy 20, about 0.5 mile south of Wilbur Bridge. Comment
  JEPS81275  Salix lasiandra var. lasiandra L. R. Heckard and J. C. Hickman 1982-7-5 5885 Colusa s side Snow Mt. (Summit Springs, slope below (s of ) area) 1500 Comment
  CDA16095  Salix lasiolepis G. F. Hrusa 1999-5-16 15048 Colusa North Coast Ranges; Goat Mountain on S side. 1722 Comment
  CHSC96763  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges. UTM 10S, 4346931 N, 0523542 E. Below summit ridge of Goat Mountain on S side. 1722 Comment
  HSC103855  Salix lasiolepis G. Fred Hrusa 1999-5-16 15048 Colusa Below summit ridge of Goat Mountain on south side. 1723 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
  CDA5812  Salpichroa origanifolia Agricultural Commissioner 1960-3-29 Colusa 0 Comment
  SBBG121614  Salsola soda L. Ahart 2006-9-26 13348 Colusa N side of Maxwell Rd, ca. 3 mi W of Colusa Princeton Rd, between ditch and Delevan Nat Wildlife Refuge 24 Comment
  CDA11412  Salvia columbariae G. F. Hrusa, K. van Katwyk 1995-4-22 12133 Colusa Inner North Coast Ranges; along Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC19702  Salvia columbariae L. A. Wright Jr. 1971-3-27 7 Colusa Scattered ca. 7 mi w of Williams on Hwy 20. Comment
  HSC44458  Salvia columbariae R. York 1978-4-22 128 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72151  Salvia columbariae J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9564 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCLA70201  Salvia columbariae Robert F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  SEINET12318609  Salvia columbariae K. A. Smail 1978-1 s.n. Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams. Wilbur Springs Quadrangle, 15'* 143 Comment
  CAS-BOT-BC238628  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield Ranch Comment
  UC2029557  Sanicula bipinnata Richard R. Halse 2013-3-26 8741 Colusa Along the Leesville Road ca. 8.3 miles northwest of its junction with State Highway 20 west of Williams, or 4.8 miles southeast of the junction with Bear Valley Road Comment
  UC106104  Sanicula bipinnatifida T. Brandegee March 1889 Colusa Leesville Comment
  UCD163673  Sanicula bipinnatifida Craig Thomsen 1999-4-15 1974 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD56944  Sanicula bipinnatifida Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3546 Colusa BLM Payne Ranch. On west side of Hwy. 16. 2 road miles south of intersection with Hwy. 20. 312 Comment
  SEINET13945139 Image available Sanicula bipinnatifida Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  UCD82730  Sanicula crassicaulis Craig Thomsen; G. Harrington 2009-5-14 2912 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
  CHSC42673  Sanicula tuberosa Vernon Oswald 1986-3-25 1052 Colusa Fouts Spring Rd. (M10) 0.5 mi e of John Smith Rd. (M5). 548 Comment
  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
  UCD163867  Schedonorus arundinaceus Craig D. Thomsen 2001-5-31 2555 Colusa Bear Creek Canyon, south of Bear Valley. About 4 miles north of Hwy 20. Comment
  CAS-BOT-BC111366  Schoenoplectus acutus var. occidentalis Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 470 Colusa Davis Tule near Sucamore Slough Comment
  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
  RSA530101A  Schoenoplectus glaucus D. W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles north of Ware Road 24 Comment
  CHSC75646  Schoenoplectus pungens Vernon H. Oswald 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd. 597 Comment
  UCD72537  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3828 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.25 mile downstream of bridge. 251 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  UC1055825  Scirpus acutus var. occidentalis Frank W. Gould 1940-5-15 1257 Colusa 2.5 mi n Maxwell (in marshes along roadside); n of Maxwell Comment
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  CHSC94324  Scirpus diffusus Lowell Ahart 2006-7-25 13062 Colusa In the west part of a large wet meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1569 Comment
  UC1100922  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12975 Colusa pond 2.7 mi n of Colusa between Sacramento River and Butte Creek; Butte Sink, n of Colusa betw Sacramento River and Butte Cree Comment
  UCR261651  Scleranthus annuus subsp. annuus Ann Howald 2003-4-24 2318 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
  UC769882  Scribneria bolanderi R. F. Hoover 3207 Colusa Upper Sand Creek Comment
  UCD163345  Scribneria bolanderi Craig D. Thomsen 2000-5-11 2351 Colusa Walker Ridge. Buck Flat. 129 Comment
  POM21047  Scrophularia californica Roxana Stinchfield 1916-6-18 305 Colusa Timber near College City Comment
  JEPS82553  Scutellaria californica L. R. Heckard 1983-7-27 6104 Colusa about 1/2 mi w of Summit Springs (south side of Snow Mountain); Snow Mountain 1470 Comment
  JEPS95817  Scutellaria californica Vernon H. Oswald and L. Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area: T17N R8W Sect. 12, ca. 3200 ft, mixed coniferous forest, serpentine substrate 975 Comment
  UCD66954  Scutellaria californica Ellen Dean; Davis Botanical Society 2008-5-31 4998 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  SBBG6519  Scutellaria siphocampyloides H. and M. Dearing 1939-5-12 3342 Colusa near Leesville 457 Comment
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  CHSC112016  Scutellaria siphocampyloides David Isle; F. Thomas Griggs 1979-5-23 2073 Colusa Mendocino National forest. Off N side Goat Mtn. Rd, about 2 miles W of jct w/ Lodoga-Stonyford Rd. Near old fire pre-attack triangular sign I-7 on metal T-post. 426 Comment
  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
  UCD163697  Secale cereale Craig Thomsen 1999-5-10 2003 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  RSA700356  Senecio clevelandii L. P. Janeway, B. Castro 2001-6-3 7103 Colusa At Buck Flat: East side of Walker Ridge at head of Gaither Canyon; about 1.3 km. south-southeast of Baldy Mountain. 872 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
  UCR238738  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-2-9 18534 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  JEPS110389  Setaria viridis Lowell Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 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
  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
  UCD57838  Sidalcea diploscypha Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 40 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
  UCR52397  Sidalcea diploscypha N. Williams, Terry Hines, Ellen Purcell 1988-4-16 53 Colusa 2 mi W on Brim Rd. from Bear Valley Rd. intersection 518 Comment
  UCD163840  Sidalcea hartwegii Craig D. Thomsen 2001-4-12 2470 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS117021  Sidalcea keckii David Gowen 2008-5-24 921 Colusa Stoneyford Ladoga Rd., ca. 1.6 miles south of Stoneyford. Growing on road shoulder on east side of road. Comment
  JEPS123189  Sidalcea keckii David Gowen 2009-5-6 1014 Colusa Eastside of Hwy 20, about 16 miles west of Williams, near milepost 6.42 (from county line?). Comment
  CHSC91809  Sidalcea oregana subsp. hydrophila G. F. Hrusa; S. Winterton 2004-6-6 16385 Colusa Northern California. Inner North Coast Ranges. Mendocino National Forest. Rd 21N06D off 21N06 off Forest Rd. M3. Lower Markham Ridge at small pond site. Pond visible on 7.5' topo. 1348 Comment
  UC725702  Silene californica A. A. Heller 1937-4-24 15351 Colusa on State Highway #20, 15 mi w Williams; w of Williams Comment
  POM253020  Silene californica A. A. Heller 1937-4-24 15351 Colusa On Highway #20, 15 miles west of Williams. 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
  UCD111674  Silene campanulata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
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Aug 11 2014
  UCD56665  Silene laciniata subsp. californica Jack Alderson 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  CHSC32220  Silene verecunda James Jokerst 1980-8-6 1053 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  SD22372  Silybum marianum Richard Neil 1938-6-20 Colusa Grimes Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  UCD66596  Sisyrinchium bellum Craig D. Thomsen 2000-4-28 2247 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
  UCD82502  Sisyrinchium bellum Craig Thomsen; G. Harrington 2009-5-12 2861 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  HSC62938  Sisyrinchium bellum Michael Dalke 1979-4-14 49 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  JEPS80059  Smilacina racemosa L. R. Heckard with J. Hickman 1979-6-15 5059 Colusa saddle trail between east peak and west peak Snow Mt 2103 Comment
  CDA33581  Solanum elaeagnifolium Robin Breckenridge 2010-8-17 PDR# 1313487 Colusa Interstate 5 north, 1 mile before Hahn Rd. exit. 0 Comment
  CHSC57525  Solanum parishii Shelly A. Kirn 1991-4-6 12 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  NY821077  Solanum parishii R. C. F. Bacigalupi 1950-4-25 3175 Colusa "Grapevine Grade" to Lodoga, ten miles northwest of Sites Comment
  UCD13386  Solanum parishii Charles Martin 1986-5-17 35 Colusa Mendocino National Forest. 3.7 miles west of Stonyford on Forest Service Road 18NO1. Comment
  CAS-BOT-BC35921  Solanum umbelliferum Roxana S. Ferris 1926-4-23 6591 Colusa Near Stonyford. Comment
  CDA15549  Solidago californica G. F. Hrusa 1998-10-28 14900 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  JEPS105309  Solidago elongata Dean W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles West from junction Lagoda-Stonyford Road, 426 Comment
  JEPS127581  Solidago velutina subsp. californica David Isle with Terril Wolt 2016-7-15 2168 Colusa North Coast Ranges: ~5 1/2 miles W of Stonyford off S side Fouts Springs Road M10 (18N01.2). Also ~5/8 mile SE of M10 Junction with Trough Sp R Rd M5 (18N07). Comment
  JEPS80224  Sonchus asper L. R. Heckard and J. Hickman 1980-7-3 5381 Colusa slopes about Summit Springs (sw slope Snow Mt.); sw slope Snow Mt. 1554 Comment
  CAS-BOT-BC235305  Sorghum halepense Roxana Stinchfield 1918-7-9 408 Colusa Phillips ranch near Sycamore 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
  UCR205143  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-10-14 14248 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  CAS-BOT-BC390103  Spergularia bocconi Roxana S. Ferris 1926-4-24 6576 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  CAS-BOT-BC390299  Spergularia macrotheca var. macrotheca Malcom A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan Comment
  CHSC79491  Spergularia marina L. P. Janeway; B. Castro 2000-3-23 6634 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  UC625432  Spergularia marina G. B. and R. P. Rossbach 1938-5-31 636 Colusa 2 mi s Maxwell (near irrigation ditch) Comment
  CAS-BOT-BC390767  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  CAS-BOT-BC390769  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 637 Colusa 2 mi. so. of Maxwell Comment
  CDA32689  Sporobolus cryptandrus Howard Johnson 1958-12-14 Colusa Arbuckle, Howard Johnson Property, Route 1, Box 91 0 Comment
  UCD81244  Stachys Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5408 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  CHSC94516  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS73445  Stachys ajugoides var. rigida L. R. Heckard 1972-7-8 3042 Colusa n side of ridge running se West Peak (ca. 10 mi w of Stonyford); Snow Mt. 2011 Comment
  JEPS75739  Stachys ajugoides var. rigida L. R. Heckard 1974-9-10 3911 Colusa ne slope West Peak; Snow Mt. 2011 Comment
  JEPS94742  Stachys albens Vernon H. Oswald and Lowell Ahart 1998-7-15 9268 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  JEPS95791  Stachys albens Vernon H. Oswald and L. Ahart 1999-6-22 9784 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 Stonyford-Lodoga Road; Little Stony Creek; 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  SEINET13710181  Stachys albens Lowell William Ahart, Lowell William Ahart 2003-1 10381 -A Colusa 2 Mi. SW Jct. Hwy 20 and Bear Valley Road, 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23' 59.5"W) 1708'W) 521 Comment
  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
  UCD61479  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
  UCD64039  Stachys albens Craig D. Thomsen 2000-6-23 2417 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  RSA0118627  Stachys rigida var. rigida Lowell Ahart 2013-10-1 19080 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
  UCR200673  Stachys stricta Craig D. Thomsen 2006-8-17 2712 Colusa BLM Payne Ranch, c. 30 feet east of Hwy 16, 0.5 mi. south of intersection between Hwy 16 and Hwy 20 300 Comment
  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
  UC72583  Stellaria media Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC86516  Stellaria nitens B. Castro 2003-3-17 1382 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  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
  UCD63014  Stellaria pallida Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4666 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. South of corral on west side of Bear Creek, just south of Hwy 20. 321 Comment
  UCD81218  Stephanomeria virgata Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5555 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  CHSC79473  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner North Coast Ranges. Slope along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment