Search Results — 2000 specimen records retrieved (1633 records with coordinates)
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/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
  HSC5007  Abies concolor J. O. Sawyer 1968-10-12 756 Colusa Colusa/Lake Co. line, Snow Mtn., boundary N of Clear Lake and W of Stony Ford 2134 Comment
  CHSC46859  Acer macrophyllum Vernon Oswald 1989-9-12 4007 Colusa Goat Mtn Rd 3.0 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. 426 Comment
  UCD80834  Acer macrophyllum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5291 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Canyon to the north of Brophy Canyon. 239 Comment
  CAS-BOT-BC21710  Achillea millefolium Roxana S. Ferris 1917-4-14 586 Colusa 5 mi. west of Arbuckle Comment
  JEPS73474  Achillea millefolium L. R. Heckard 1972-7-9 3083 Colusa along trail from Frog Pond to Milk Ranch Frog Pond; Snow Mt. (southern range extension) 1950 Comment
  JEPS80821  Achillea millefolium L. R. Heckard and J. C. Hickman 1981-7-31 5792 Colusa along, on east side of Snow Mt. Dark Hollow Creek; Snow Mt. 1584 Comment
  UC1071729  Achillea millefolium J. Clausen 1939-6-26 1743 -4 Colusa 17 mi w of, (just before entering Lake County) Williams Comment
  UCD57663  Achillea millefolium Erica A. Smith; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road. 313 Comment
  UCD82114  Achillea millefolium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5642 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CHSC32199  Achnatherum occidentale subsp. californicum James D. Jokerst 1980-8-8 1082 Colusa North Coast Ranges. Near Snow Mountain (West). 2133 Comment
  JEPS75746  Achnatherum occidentale subsp. californicum L. R. Heckard 1974-9-11 3945 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  CAS-BOT-BC29877  Achyrachaena mollis B. Ellyson; J. Hooke; D. Newman 1996-5-4 40 Colusa Bear Valley, Leesville, 1.3 mi. south fo Brim Road on Bear Valley Road; 14.7 mi. on Walker Ridge Road 414 Comment
  CHSC27825  Achyrachaena mollis K. D. Whitney 1978-4-8 32 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UC75911  Achyrachaena mollis Miss M. Alice King 1905-1-1 Colusa near College City; Sacramento Valley Comment
  UCD163687  Achyrachaena mollis Craig Thomsen 1999-4-15 1989 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD64421  Achyrachaena mollis Craig D. Thomsen 2000-4-28 2177 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC29876  Achyrachaena mollis B. G. Baldwin 1986-4-13 598 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  UCD64035  Acmispon americanus var. americanus Craig D. Thomsen 2000-6-23 2413 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
  CHSC94419  Acmispon brachycarpus Lowell Ahart 2006-8-22 13217 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD56902  Acmispon brachycarpus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3505 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD63918  Acmispon brachycarpus Craig D. Thomsen 2001-5-24 2508 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCD64282  Acmispon brachycarpus Craig D. Thomsen 2000-3-31 2098 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  UCD66677  Acmispon denticulatus Craig D. Thomsen 2000-5-11 2290 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD72387  Acmispon glaber Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5113 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 550 Comment
  SD131845  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 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
  HSC48196  Acmispon micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3960 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CHSC81265  Acmispon rubriflorus L. P. Janeway; B. Castro 2001-4-25 7026 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 329 Comment
  SD247416  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 (Lodoga 7.5'Q) 423 Comment
  UCR261727  Acmispon rubriflorus Ann Howald 2003-6-9 2363 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, east of Sleepy Hollow camping area 383 Comment
  UCD163704  Acmispon wrangelianus Craig Thomsen 1999-5-10 2016 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD57278  Acmispon wrangelianus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3646 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  CAS-BOT-BC29714  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CAS-BOT-BC133151  Adenostoma fasciculatum Roxana S. Ferris 1917-4-14 594 Colusa 5 mi west of Arbuckle along Sand Creek, Arbuckle - Rumsey Road Comment
  HSC72177  Adenostoma fasciculatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9555 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  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
  CDA4027  Aeschynomene rudis G. D. Barbe, June McCaskill 1990-9-5 4397 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  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
  UCD14547  Aesculus californica Rob Ickel 1989-5-27 12 Colusa California, Colusa Co.; along Highway 16, 1.5 mi south of junction with Highway 20; 316 Comment
  UCD81226  Aesculus californica Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5563 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
  JEPS83147  Ageratina occidentalis L. R. Heckard 1974-9-10 3887 Colusa stream of upper reaches Dark Hollow Creek; Snow Mt., East Peak 2011 Comment
  UCD66705  Agoseris grandiflora Craig D. Thomsen 2001-4-12 2490 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82115  Agoseris grandiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5643 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
  CHSC79649  Agoseris heterophylla L. P. Janeway; B. Castro 2000-5-2 6690 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  UCD65647  Agoseris heterophylla Craig D. Thomsen 2000-4-28 2188 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
  UCD82475  Agoseris heterophylla Craig Thomsen; G. Harrington 2009-5-12 2853 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 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
  CHSC94532  Agrostis avenacea Lowell Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80443  Agrostis exarata L. R. Heckard and J. C. Hickman 1980-9-15 5420 Colusa w of Summit Springs; Snow Mt. 1554 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
  CAS-BOT-BC445318  Alisma lanceolatum Milo S. Baker 1946-9-5 11631 Colusa Along Hiwy. bet. Colusa and Williams Comment
  CHSC94417  Alisma triviale Lowell Ahart 2006-8-22 13231 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD137979  Alisma triviale June McCaskill; W. A. Harvey 1954-8-9 360 Colusa 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UCD63709  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch. About 0.25 mile south of intersection of Hwy 16 and Hwy 20. Near confluence of Hamilton Flat and Jackson Canyon drainages, about 10 meters east of Bear Creek, west of Hwy 16. Comment
  UCD141857  Allium L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  CAS-BOT-BC131915  Allium Roger Raiche 1985-3-19 RR 50160 Colusa Colusa-Lake County line, Walker Ridge, 3.4 miles south of north end of Barrel Springs Campground on Walker Ridge Road 1036 Comment
  JEPS120965  Allium amplectens Lowell Ahart 2013-5-1 18682 Colusa Near a small drainage, N of the wash and 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
  JEPS80119  Allium amplectens L. R. Heckard with J. Hickman 1980-7-1 5275 A Colusa near bottom of s side of East Peak; Snow Mt. 2042 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
  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
  UC1561213  Allium bolanderi Barbara Ertter 1989-7-1 8619 Colusa road to Goat Mt. Lookout 0.4 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk. Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1371 Comment
  UCD138461  Allium cratericola Louis K. Mann 1961-3-19 s.n. Colusa Bear Valley. 396 Comment
  UCD141844  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  UCD141847  Allium cratericola L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa south end of Bear Valley. Comment
  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
  UCD110814  Allium falcifolium Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD63019  Allium falcifolium Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4671 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the west of Cowboy Camp on the west side of Bear Creek. 419 Comment
  CAS-BOT-BC467302  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford Comment
  POM174570  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford. Comment
  UCD141835  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
  SEINET12043975  Allium fimbriatum A. Eastwood, Howell, J. T. 1938-1 5626 Colusa Lake-- Colusa county line on road to Williams Comment
  UC2014135  Allium fimbriatum subsp. purdyi Michele Lanctot with Plant Biology 102 2007-4-29 2 Colusa Colusa County: Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. Comment
  CAS-BOT-BC135883  Allium fimbriatum subsp. purdyi M. S. Baker 1937-5-17 8657 Colusa Hiway 20, nr. Lake Co. line. Comment
  CHSC112220  Allium fimbriatum var. purdyi Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC42391  Allium fimbriatum var. purdyi Dale McNeal 1977-5-18 2028 Colusa Beside Hwy. 20, 0.9 mi. W of the junction with Hwy. 16 Comment
  HSC67119  Allium fimbriatum var. purdyi Dale McNeal 1980-4-26 2318 Colusa Above Bear Valley Rd., 1.4 mi. N of its junction with Hwy. 20 Comment
  RSA161099  Allium fimbriatum var. purdyi Peter H. Raven 1962-5-31 17908 Colusa Highway 20, 2.5 miles east of Lake County Line Comment
  UCD138533  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD141783  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD66911  Allium fimbriatum var. purdyi Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and WNW of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCR198144  Allium fimbriatum var. purdyi Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3672 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  UCR80282  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Road c. 2 mi from the junction w/ State Route 20. 366 Comment
  SEINET3884500  Allium fimbriatum var. purdyi Thomas Nelson, Jane P. Nelson 1978-4-30 3972 Colusa State Route 20 just east of Colusa-Lake county line.; 0 549 Comment
  CHSC2063  Allium serra D. Smith 1935-5-12 Colusa Stonyford Hills. Comment
  CHSC77625  Allium serra Heidi West; Jenny Marr, Julie Cunningham 1998-4-15 Colusa Vicinity of Grapevine creek and Sites-Lodoga Road. 146 Comment
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 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-BC475542  Allium serra Roxana S. Ferris 1926-4-23 6584 Colusa Field 2 miles from Stonyford Comment
  CAS-BOT-BC475543  Allium serra Roxana S. Ferris 1917-4-14 557 Colusa Foothills 7 miles west of Arbuckle Comment
  CAS-BOT-BC475549  Allium serra James R. Shevock 1973-4-14 2551 Colusa Occasional along Leesville Road; Northern Coast Ranges 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
  UCD141808  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mi. toward Clear Lake from junction of California Highway #16 and #20. Comment
  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
  UCD141828  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa along road 3.2 miles past junction of California 16 and 20, toward Rumsey, SW part of county. Comment
  UC1051499  Allophyllum divaricatum Helen K. Sharsmith 1953-6-19 4280 Colusa 1 mi. n. Trough Springs (on Trough Springs Ridge); Inner N. Coast Ranges, Mendocino Nat'l Forest, Trough Spring 914 Comment
  RSA113928  Allophyllum divaricatum H. K. Sharsmith 1953-6-19 4280 Colusa One mile north of Trough Springs on Trough Springs Ridge. Mendocino National Forest 915 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
  UCD82489  Allophyllum gilioides Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 853 Comment
  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
  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
  JEPS73496  Alnus incana subsp. tenuifolia L. R. Heckard 1972-7-10 3112 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Springs (ca 10 mi w of Stonyford)) 1828 Comment
  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
  CDA12377  Alnus rhombifolia G. F. Hrusa 1996-1-2 12630 Colusa Inner North Coast Ranges; Little Stony Creek, +/- 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  RSA718199  Alnus rhombifolia L. Ahart 2006-8-9 13108 Colusa On north side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 423 Comment
  UCD110005  Alnus rhombifolia G. F. Hrusa 1996-1-23 12630 Colusa Riparian area of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. 475 Comment
  SEINET10510969  Alopecurus californicus Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles E of Williams. Alkali Plains. Comment
  RSA198503  Alopecurus saccatus Roxana S. Ferris 1917-8-12 549 Colusa 4 miles east of Williams, alkali plains. Comment
  CHSC112624  Amaranthus californicus Lowell Ahart 2013-10-1 19089 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCD39269  Amaranthus palmeri B. Crampton 1958-6-26 4973 Colusa Grieve road just n.e. of Hershy R.R. siding, 5.5 miles south of College City, Colusa County. Comment
  CAS-BOT-BC55588  Ambrosia psilostachya Roxana Stinchfield 1916-6-17 276 Colusa Cemetery, College City Comment
  CHSC94748  Ambrosia psilostachya Lowell Ahart 2006-9-26 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  JEPS104399  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS110533  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford 347 Comment
  POM50992  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  RSA724821  Ambrosia psilostachya L. Ahart 2006-9-29 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5.5 mileseast of Maxwell. 24 Comment
  UCD72396  Ambrosia psilostachya Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5122 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Confluence of Cache and Bear Creeks at southern tip of ranch. 198 Comment
  JEPS110091  Ammannia robusta Lowell Ahart 2006-8-9 13142 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC25321  Ammi visnaga Hayes; Warner, Schlising 1977-8-23 48 Colusa Along River Rd. on the east side of the Sacramento River, 3.5 mi n Of Colusa. 50 Comment
  UCD127170  Ammi visnaga V. C. Bryant 1929-9-1 s.n. Colusa location unknown. Comment
  RSA0090976  Amsinckia intermedia R. R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455-4th Street. 18 Comment
  SEINET7096533  Amsinckia intermedia Richard R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52 N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  HSC31598  Amsinckia intermedia Thomas E. Higley 1974-5-5 84 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  CHSC86518  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1397 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 277 Comment
  SBBG126065  Amsinckia lunaris G. K. Helmkamp with E. A. Helmkamp 2009-3-11 14368 Colusa St Hwy 20, 9.7 mi SW of Williams, on N side of Salt Crk 162 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
  UCD63713  Amsinckia lunaris Craig D. Thomsen 2008-3-30 2722 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, near ridgeline and headwaters of Eula Canyon drainage. 501 Comment
  UCD77237  Amsinckia lunaris Robert E. Preston 2005-4-10 2330 Colusa Ca. 0.9 mi ESE of Wilbur Springs, along Bear Valley Road. 373 Comment
  RSA0089732  Amsinckia lunaris B. Castro 2003-3-18 1384 -a Colusa Vicinity of Sites (Offstream Storage Investigation: Sites S. Bridge road route), hills N of the Sites-Lodoga Road, and Stone Corral Creek. 198 Comment
  CHSC37413  Amsinckia lycopsoides R. A. Schlising; K. R. Stern 1980-5-5 3583 Colusa Colusa National Wildlife Refuge; southwest of Colusa; southwest corner of refuge, north of Ware Road. Comment
  HSC94205  Amsinckia menziesii D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 13 Colusa On Bear Valley Rd., 1.2 mi. S of the junction with Brim Rd. 415 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
  UCD67070  Amsinckia menziesii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5098 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
  CHSC34508  Ancistrocarphus filagineus J. D. Prouty 1980-4-12 80 .66 Colusa Roadbank of Hwy 20 ca. 0.3 mi W of junction with Hwy 16 near Bear Creek Bridge. 320 Comment
  HSC48170  Ancistrocarphus filagineus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3934 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS16206  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (w of base of grade to Indian Valley (Bartlett Mt. Road)) Bear Valley; Inner North Coast Ranges, Indian Valley, Bear Valley Comment
  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
  UC1923720  Ancistrocarphus filagineus A. Liston and M. Blumler 1987-4-26 667 -11 Colusa Bear Valley. Lodoga Road 6.6 miles S of Bartlett Springs Jct. Valley floor 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
  CHSC81290  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2001-4-19 7025 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 280 Comment
  CHSC86874  Androsace elongata subsp. acuta B. Castro 2003-4-1 1409 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, on low N-facing cutbank of dirt road which contours along hillside. 280 Comment
  CHSC32214  Antennaria geyeri James Jokerst 1980-8-6 1060 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  UC29539  Anthemis cotula J. Burtt Davy 1898-5-1 4280 Colusa Willows Comment
  UCD163218  Anthemis cotula Craig D. Thomsen 2000-5-11 2325 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC83681  Antirrhinum subcordatum L. P. Janeway; Shirley Innecken 2002-5-1 7528 Colusa Inner North Coast Ranges. Vicinity of Grapevine Creek, Rena Canyon, and Scotties Canyon. 243 Comment
  UCD70222  Antirrhinum vexillocalyculatum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC94710  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  JEPS108788  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  RSA724838  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  RSA0105546  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Ranges: ~4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill ~200' S of 18N01. 439 Comment
  CHSC91007  Aphanes occidentalis D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. 548 Comment
  CDA12100  Apiastrum angustifolium G. F. Hrusa 1989-5-7 6089 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3 miles upstream from junction with Stonyford-Lodoga Rd. Comment
  JEPS87724  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  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
  JEPS95645  Apocynum cannabinum Vernon H. Oswald and L. Ahart 1999-6-18 9773 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate 624 Comment
  POM129769  Apocynum cannabinum Roxana Stinchfield 1916-7-8 s.n. Colusa Stinchfield Ranch, along Sycamore Slough Comment
  JEPS82549  Arabis glabra var. glabra L. R. Heckard 1983-7-27 6110 Colusa ca. 1/4 mi. w. Summit Springs (s. side Snow Mt.); Snow Mt. 1500 Comment
  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
  UCD19963  Arceuthobium campylopodum C. H. Lamoureux; R. Gankin 1956-3-16 1018 Colusa 2 miles west of junction of State Routes 16 and 20. 1 mile east of Lake County line. Comment
Read comments
1
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  UCD50538  Arctostaphylos canescens G. L. Webster 1989-5-6 7700 Colusa Near border with Lake County, Pinus attenuata woods on crest of Walker Ridge, near Cold Springs Mountain. Comment
  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
  CDA16131  Arctostaphylos manzanita G. F. Hrusa 1999-2-13 14915 Colusa North Coast Ranges; along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  SD53207  Arctostaphylos manzanita Darley F. Howe 1962-5-19 3285 Colusa 11 miles west of Williams on Highway 20. 149 Comment
  CHSC92603  Arctostaphylos manzanita subsp. elegans D. Isle 2005-7-14 1153 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Board Camp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  CAS-BOT-BC24423  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-9 s.n. Colusa Hershey, se. Colusa Co. Comment
  CHSC86877  Arctostaphylos manzanita subsp. manzanita B. Castro 2003-3-28 1407 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 170 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
  SEINET7258424  Arctostaphylos manzanita subsp. roofii R. R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 mi WNW of its junction with State Hwy. 20. 378 Comment
  SEINET7760675 Image available Arctostaphylos manzanita subsp. roofii Richard R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 mi WNW of its junction with State Hwy. 20. 378 Comment
  SFV8791  Arctostaphylos viscida S. C. Schank 1960-4-10 51 Colusa Above Cache Creek, 2 miles northwest of junction of Highway 16 and Highway 20 on road to Bear Valley. Comment
  UCD15253  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  UCD66999  Arctostaphylos viscida Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  HSC62937  Arctostaphylos viscida Michael Dalke 1979-4-14 45 .5 Colusa 1067 Comment
  CHSC62844  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald 1994-3-23 6011 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  JEPS87758  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald and Lowell Ahart 1994-3-23 6011 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  CAS-BOT-BC44549  Arctostaphylos viscida subsp. viscida Eric B. Peterson; Thomas Ward; Matt Foruria 1995-4-1 47 Colusa Walker Ridge Rd., 0.9 mile NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek. 810 Comment
  RSA589937  Arctostaphylos viscida subsp. viscida Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7301 Colusa Along Brim Rd., 1.9 mi. W juct . Bear Valley Rd. Comment
  SBBG25408  Arctostaphylos viscida subsp. viscida R. Gankin 1958-4-26 292 Colusa Leesville-Bartlett Springs Rd, ca. 2 mi W of jct of this rd and Leesville-Wilbur Springs Rd, near Colusa-Lake County line Comment
  POM367485  Arctostaphylos viscida subsp. viscida Phyllis Krieg 1979-4-14 s.n. Colusa [Unspecified] 1067 Comment
  UCD95197  Argemone munita K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  CDA24525  Argemone munita subsp. rotundata R. Lawley 1960-5-22 Colusa Stonyford. 0 Comment
  POM257214  Argemone munita subsp. rotundata Lincoln Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station 549 Comment
  CAS-BOT-BC400398  Aristolochia californica Roxana Stinchfield 1916-7-8 377 Colusa Sycamore Slough, Stinchfield Ranch Comment
  POM165698  Aristolochia californica Roxana S. Ferris 1917-4-15 s.n. Colusa Sycamore Slough Comment
  UCD146598  Arnica discoidea G. F. Hrusa 1998-6-19 14615 Colusa North Coast Ranges. USFS Pacific Ridge Road, 4-5 km northwest of intersecion with Colus County Goat Mountain Road. 1200 Comment
  JEPS15569  Arnica longifolia G. Thomas Robbins with L. R. Heckard 1956-7-25 3712 Colusa Snow Mt. East (s flank) Dark Hollow Creek, Snow Mt. East 1981 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
  CHSC112642  Artemisia douglasiana Lowell Ahart 2013-10-1 19098 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC84932  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  IRVC29848  Artemisia douglasiana Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4994 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  JEPS104400  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS15567  Asclepias fascicularis G. Thomas Robbins with L. R. Heckard 1956-7-25 3714 Colusa above Dark Hollow Creek (tributary of Middle Fork Stony Creek) (s flank of Snow Mt. East, at lower edge of cirque between Snow Mt. East and Snow Mt. West); Snow Mt. East 1981 Comment
  UCD82491  Asclepias fascicularis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5677 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  HSC72214  Asclepias solanoana Thomas W. Nelson, Jane P. Nelson 1980-6-24 5876 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  JEPS95651  Asclepias speciosa Vernon H. Oswald and L. Ahart 1999-6-18 9774 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate. From a colony growing along the edge of a roadside seep. 624 Comment
  JEPS80758  Asclepias speciosa L. R. Heckard and J. C. Hickman 1981-7-29 5725 Colusa above Summit Springs (s side of mountain); Snow Mt., Colusa-Lake County Boundary 1554 Comment
  UC1049537  Astragalus breweri Rimo Bacigalupi 1950-4-16 3112 Colusa four mi s Ladoga (6 mi nnw of Leesville, in Indian Valley (not the one in Lake County) along Little Indian Creek, eastern base of Inner North Coast Ranges); eastern base Inner North Coast Ranges, Little Indian Creek 396 Comment
  CHSC91565  Astragalus clevelandii D. Isle 1995-7-12 393 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Adjacent to BLM parcel 281-C. 585 Comment
  CAS-BOT-BC366914  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles E of the junction of State Hwys. 20 and 53 558 Comment
  CDA11399  Astragalus gambelianus G. F. Hrusa, K. van Katwyk 1995-4-22 12119 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  CHSC101594  Astragalus gambelianus David W. Isle 2002-4-18 1659 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trail (Snow Mtn). MDB and M. 524 Comment
  HSC72171  Astragalus gambelianus Thomas W. Nelson, Jane P. Nelson 1978-4-2 9548 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD163330  Astragalus gambelianus Craig D. Thomsen 2009-5-3 2799 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  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
  CHSC29256  Astragalus rattanii var. jepsonianus John Steiner 1977-4-16 46 Colusa Growing in an open field, ca. 0.5 km w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 322 Comment
  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
  UCD105314  Astragalus rattanii var. jepsonianus J. M. Tucker; Dorothy Dreyfus 1967-4-29 4034 Colusa Bear Valley, 9 miles north of junction of Bear Valley Road with State Highway 20. 403 Comment
  UCD163326  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2009-5-3 2791 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD57293  Astragalus rattanii var. jepsonianus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3664 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD63032  Astragalus rattanii var. jepsonianus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4684 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. 312 Comment
  UCR212339  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UCR212345  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 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
Read comments
Aug 8 2014
  JEPS59519  Atriplex argentea var. mohavensis W. L. Jepson 1929-9-26 15274 Colusa Maxwell 25 Comment
  RSA670513  Atriplex cordulata Stan C. Spencer 2002-8-8 unnumbered Colusa ca. 3-6 miles E of Colusa, along California Highway 20. 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
  CHSC60279  Atriplex depressa K. R. Stern 1980-6-30 6654 Colusa Vernal Pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC79494  Atriplex fruticulosa L. P. Janeway; B. Castro 2000-3-23 6637 A Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CHSC80183  Atriplex fruticulosa B. Castro; G. Kuenster 2000-7-19 1208 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 42 Comment
  UCD97410  Atriplex fruticulosa P. B. Kennedy 30-31 May 1922 s.n. Colusa Colusa County. Comment
  POM164903  Atriplex joaquinana Roxana S. Ferris 1917-4-12 505 Colusa 4 miles east of Williams. Comment
  UCD97461  Atriplex joaquinana A. A. Heller 1916-6-9 12394 Colusa near Williams. Comment
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS108755  Atriplex rosea Lowell Ahart 2006-9-26 13346 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UC217003  Atriplex serenana var. serenana H. M. Hall 1920-7-12 11011 Colusa 5 mi e Maxwell; e of Maxwell Comment
  CHSC94733  Atriplex triangularis Lowell Ahart 2006-9-26 13347 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
  UC53770  Avena barbata J. Burtt Davy May 1898 4294 Colusa near Princeton Comment
  SEINET3919645  Avena barbata Patricia Shesgreen 1978-4-22 33 Colusa Wilbur Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  CAS-BOT-BC98202  Baccharis salicifolia Alice Eastwood 1921-4-11 10231 Colusa Colusa Comment
  SEINET7239582 Image available Baccharis salicifolia R. R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20, ca. 7.8 miles NE of its junction with State Hwy. 16 at base of Salt Canyon 100 Comment
  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
  UCD97560  Bassia hyssopifolia P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. 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
  RSA518720  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fjuii, Dawn Espindola 1989-10-21 8869 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UCR71523  Bergia texana Barbara Ertter, Et al. 1989-10-21 8869 Colusa SE end of East Park Reservoir north of Lodoga 366 Comment
  UC1532346  Berula incisa Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Road (M10) at Candy Bucket Spring, 6.0 miles W of Road 306, 0.4 mi E of junction John Smith Road (M5). Comment
  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
  RSA724819  Bidens frondosa L. Ahart 2006-9-26 13344 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CAS-BOT-BC100260  Blennosperma nanum var. nanum Roxana S. Ferris 1917-4-12 498 Colusa 4 miles East of Williams Comment
  JEPS86635  Boechera breweri subsp. breweri L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6687 Colusa sw flank Snow Mtn. (Summit, East Peak); , East Peak 2150 Comment
  JEPS80391  Boechera repanda L. R. Heckard, and J. Hickman 1981-6-22 5624 Colusa Dark Hollow trail Snow Mt. 1965 Comment
  CHSC96359  Boehmeria cylindrica D. Koenig; L. Bateman 2006-10-6 Colusa Sacramento Valley. By a slough along the west side of the Sacramento River, about 0.5 mi south-southeast of Stegeman. 21 Comment
  CHSC107167  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-4-27 10245 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. In 6-10 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  UCD140021  Bolboschoenus maritimus subsp. paludosus K. Esau; D. Hartmann 1941-7-17 s.n. Colusa near Williams. Comment
  UCD140020  Bolboschoenus maritimus subsp. paludosus C. F. Dunshee 1922-7-28 24 Colusa Cortina. Comment
  CAS-BOT-BC418408  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek 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
  CAS-BOT-BC127848  Brickellia grandiflora Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5033 Colusa Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp 1989 Comment
  IRVC29685  Brickellia grandiflora Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5033 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  SEINET7075565  Brodiaea elegans A. G. Vestal 1955-4-5 3684 Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  UCR206363  Brodiaea elegans George K. Helmkamp, E. A. Helmkamp 2009-5-20 14747 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  JEPS7632  Brodiaea elegans subsp. elegans W. L. Jepson 1920-5-23 8961 Colusa foothills near Mountain House (sw Colusa Co.); Venado Comment
  JEPS81271  Brodiaea elegans subsp. elegans L. R. Heckard and J. C. Hickman 1982-7-5 5879 Colusa slope below (s of) area Summit Springs (s side of Snow Mountain); s side Snow Mountain 1500 Comment
  POM169614  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa Near College City. Comment
  UCD72482  Brodiaea elegans subsp. elegans Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3816 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  UCD37189  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa Colusa County, 5.8 miles south of Lodoga. Comment
  CAS-BOT-BC149477  Bromus carinatus var. carinatus F. P. Cronemiller 1924-5-12 877 Colusa Below Lower Letts Valley. 1219 Comment
  UCD57551  Bromus diandrus Cindy Yip; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  UCD83625  Bromus diandrus Adam Clause; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. Eaton Springs. 20 meters south of the main road, on the flat valley floor. 709 Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 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
  UCD57485  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa Inner north coast ranges. Mendocino National Forest. Red Bridge Camp. Near confluence of North and Middle forks of Stoney Creek. 548 Comment
  UCD58884  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa Inner North Coast Ranges. Mendocino National Forest. Red Bridge Camp. Near confluence of North and Middle forks of Stoney Creek. 548 Comment
  UCD72529  Bromus laevipes Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3820 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek along trail that begins approximately opposite the BLM parking lot near south end of bridge. Approx. 0.75 mile along trail. 286 Comment
  CHSC112028  Bromus laevipes David Isle; Doug Johnson 1988-5-11 2089 Colusa Mendocino National Forest. Little Stony Road (Goat Mtn Rd). 426 Comment
  JEPS80793  Bromus orcuttianus L. R. Heckard and J. C. Hickman 1981-7-30 5763 Colusa se Snow Mountain, going down Trout Creek Trout Creek; Snow Mountain, Trout Creek 1569 Comment
  CHSC94853  Bromus pseudolaevipes Lowell Ahart 2006-6-11 12670 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  SEINET4404370  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  CHSC94534  Bromus tectorum Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD59764  Bromus tectorum Beecher Crampton 1958-5-19 4808 Colusa West of Lodoga. Comment
  UCD67035  Bromus tectorum Ellen Dean; Davis Botanical Society 2008-5-31 5016 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD129652  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3519 Colusa Trough Spring, at northeast end of Trough Spring Ridge, ca. 5.75 miles (airline) southwest of Stonyford. 975 Comment
  JEPS120964  Calandrinia breweri Lowell Ahart 2013-5-1 18659 Colusa 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
  CAS-BOT-BC438309  Calandrinia ciliata Roxana S. Ferris 1917-4-12 535 Colusa 4 miles east of Williams Comment
  JEPS52594  Calandrinia ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  RSA783301  Calandrinia ciliata R. R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca. 10 miles N of Colusa (junction of State Hwys 45 & 20). 22 Comment
  UCD163689  Calandrinia ciliata Craig Thomsen 1999-4-15 1991 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD100196  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Walker Ridge, along Walker Ridge Rd. nr. Turn-off to Bear Valley on north end; serpentine. Comment
  UCD103570  California macrophylla Craig Thomsen 2011-3-28 s.n. Colusa BLM Bear Creek (formerly Payne) Ranch. W of intersection of Hwys 16 and 20; E side of 'Serpentine Creek.' Drainage runs north from Bear Creek Ranch flowing under pull out along Hwy 20. 335 Comment
  UCD57817  California macrophylla Gordon Harrington 2007-3-22 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. 472 Comment
  UCR198059  Calochortus amabilis E. Jacqueline Garcia 1986-4-13 s.n. Colusa Bear Valley, 2.6 mi west of the junction of Bear Valley Road and Bartlett Springs Road, on Bartlett Springs Road 664 Comment
  CAS-BOT-BC492117  Calochortus amabilis F. P. Cronemiller 1924-5-10 875 Colusa Mill Creek Ranger Station 609 Comment
  CAS-BOT-BC492123  Calochortus amabilis A. A. Heller 1940-5-6 15577 Colusa 2 miles west of Junction with Highway #16, on State Highway #20 Comment
  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
  RSA601304  Calochortus luteus Jens Clausen 1935-5-20 1011 Colusa 18 mi W of Williams on Bartlett Springs Road. Past the Stonyford 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
  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
  UC616859  Calochortus splendens L. Constance 1939-5-14 2491 Colusa 2.5 mi e Bonnie View (above Middle Fork of Stony Creek, e base of Snow Mountain); Inner North Coast Ranges, Snow Mountain 518 Comment
  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
  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
  UCD63912  Calycadenia fremontii Craig D. Thomsen 2000-6-23 2401 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  RSA789275  Calycadenia micrantha R. L. Carr 1994-9-23 2656 Colusa Wilson Camp, southwest of Stoneyford, near the Colusa/Lake County line, ca. 3 air miles southeast of Goat Mountain. 1400 Comment
  CAS-BOT-BC270758  Calycadenia pauciflora K. C. 1884-7-1 s.n. Colusa Mountain House Comment
  RSA255585  Calycadenia pauciflora Gerald D. Carr 1972-6-14 703 Colusa At the Lake County line on Hwy. 20 Comment
  UC1299279  Calycadenia pauciflora Freed W. Hoffman 1947-6-20 1619 Colusa road from Stonyford to Fouts Springs Paskenta; North Coast Ranges 502 Comment
  CAS-BOT-BC270750  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 mile S of Stoneyford on road to Lodoga 365 Comment
  RSA255514  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6 miles north of Yolo County Line on Hwy. 16 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
  UC1876227  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 mi N of Hwy 20 on Bear Valley Rd., along banks of Bear Cr. Comment
  UC1876632  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 mi N of Yolo Co. line on Hwy 16. Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UC1971710  Calycadenia pauciflora 1978-8-20 2155 Colusa Brim Road (to Bartlett Springs), 1.5 mi W of jct with Bear Valley Road, ca. 3.6 mi SW of Leesville (=GDC 652) 482 Comment
  UCD129837  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile east of Lake County line on Bartlett Springs Road. Comment
  UCD129839  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles east of Walker Ridge Road on Deadshot Road. 731 Comment
  UCD129840  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 miles west of Leesville-Lodoga Road on road to Cook's Springs. Comment
  UCSB6412  Calycadenia pauciflora Keator, Glenn 1958-6-16 Colusa Along road from Lower Lake to Sacramento Valley just east of Lake-Colusa county line Comment
  RSA0059895  Calystegia collina subsp. collina Gloria R. Campbell 1948-6-18 653 Colusa 2 miles west of junction of Highways 16 and 20. Comment
  UCSB4973  Calystegia occidentalis Keator, Glenn 1958-6-16 Colusa Foothills west of Bartlett Springs Comment
  JEPS81301  Calystegia occidentalis subsp. occidentalis L. R. Heckard and J. C. Hickman 1982-7-5 5915 Colusa slope below Summit Springs, S side Snow Mountain Comment
  UCD81718  Calystegia occidentalis subsp. occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5723 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCD164158  Calystegia subacaulis Craig Thomsen 2000-4-28 2266 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  UCD138336  Camassia leichtlinii subsp. suksdorfii J. M. Tucker; L. K. Mann 1959-5-30 3531 Colusa on small lake in Mill Valley, around 1/4 mile northwest of Lower Letts Valley, and around 4 miles, airline, north of Goat Mountain Lookout. 1219 Comment
  CHSC100287  Camassia quamash David Isle 1990-6-6 1517 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  HSC45719  Camissonia contorta Sheila Logan 1978-4-22 27 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  POM271975  Camissonia graciliflora Lyman Benson 1935-3-27 6328 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  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
  JEPS94220  Camissoniopsis hirtella Vernon Oswald and Lowell Ahart 1998-5-7 9004 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  UCD37191  Camissoniopsis hirtella Beecher Crampton 1958-5-19 4807 Colusa 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  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
  UCD165932  Campanula griffinii Ellen Dean; with Tom Starbuck 2016-4-24 8843 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  JEPS80789  Campanula prenanthoides L. R. Heckard and J. C. Hickman 1981-7-30 5762 Colusa se side Snow Mt.; Trout Creek 1569 Comment
  UCR238927  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2012-2-9 18532 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  UCR200671  Cardaria draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch, southwest of intersection between Hwy 16 and Hwy 20, along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20 Comment
  CHSC112228  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2013-5-1 18660 Colusa On the sides of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  UC596489  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
  JEPS63533  Carex barbarae W. L. Jepson 1934-7-28 14747 Colusa Cortina Velly, hills SE of Colusa county Comment
  JEPS80868  Carex bolanderi L. R. Heckard and J. C. Hickman 1981-7-31 5796 Colusa Dark Hollow Creek, E side of Snow Mountain 1584 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
  SEINET7556704 Image available Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC92529  Carex feta G. F. Hrusa; WTD 1998-6-19 14619 Colusa Wet area on spring along Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). 975 Comment
  UC1563913  Carex fracta Barbara Ertter 1989-7-1 8610 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  JEPS80866  Carex hoodii L. R. Heckard and J. C. Hickman 1981-7-31 5778 Colusa near Fouts Springs Overlook (e side of Snow Mt.); Snow Mt. 1798 Comment
  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
  CHSC92669  Carex pachystachya D. Isle 2005-9-14 1173 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Meadow west of Angel Spring, Snow Mountain Wilderness. 10S 0522348E 4358185N = Angel Springs. Comment
  UCR228283  Carex praegracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4947 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 399 Comment
  CAS-BOT-BC118348  Carex praegracilis Roxana S. Ferris 1917-4-17 625 Colusa Under trees, Sycamore Slough. Comment
  UCD140770  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  CHSC45069  Carex serratodens Vernon Oswald 1984-5-2 1169 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18N01) 5.9 mi w of Stonyford. 609 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
  UCD67060  Carex serratodens Craig D. Thomsen 2008-3-20 2716 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 600 Comment
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82514  Carex serratodens Craig Thomsen; G. Harrington 2009-5-12 2872 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  JEPS80885  Carex subfusca L. R. Heckard and J. C. Hickman 1980-9-16 5451 Colusa first meadow along trail from Frog Pond (e of West Peak); Snow Mt. 1981 Comment
  CAS-BOT-BC116775  Carex subfusca Peter H. Raven; R. Snow 1959-9-11 14422 Colusa Along stream in wet soil, Bonnie View. 914 Comment
  CDA15498  Carex tumulicola G. F. Hrusa, T. D. Wilfred 1998-6-19 14635 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  CHSC82975  Carex tumulicola Barbara Wilson; R. Brainerd, L. Janeway, D. Isle, M. Mooers 2002-6-28 10705 Colusa High North Coast Ranges. Near Ellen Spring; north side of Road 24N02 0.2 km south of junction with Goat Mountain Road. At base of road fill. 1052 Comment
  CHSC89621  Castilleja affinis subsp. affinis Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  JEPS74811  Castilleja affinis subsp. affinis L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-7 4019 Colusa 4.5 mi se (by road) Leesville Comment
  UCD84431  Castilleja applegatei Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
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Mar 2 2015
  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
  CHSC27516  Castilleja attenuata Michael F. Henetz 1978-4-15 6 Colusa Ca. 150 m s of Hwy 20, ca. .5 km w of Williams. S central border of Section 36. 322 Comment
  HSC47735  Castilleja attenuata Thomas W. Nelson, Jane P. Nelson 1978-4-29 3940 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  RSA0011988  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  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
  UCD56924  Castilleja attenuata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3527 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  UCD64255  Castilleja attenuata Craig D. Thomsen 2000-3-31 2056 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  CHSC27537  Castilleja exserta Greg C. Halcomb 1978-4-9 12 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  UC1053455  Castilleja exserta Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3165 Colusa 8 mi nw Maxwell (along road to Sites, in canyon between first hills on extreme w edge of the Sacramento Valley); Sacramento Valley Comment
  UCD40887  Castilleja exserta R. Rhode 1984-4-21 s.n. Colusa 10 miles north of intersections of highways 16 and 20 in Bear Valley. 426 Comment
  CHSC59611  Castilleja exserta subsp. exserta Carole Pauls 1975-4-20 5 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  JEPS58564  Castilleja exserta subsp. exserta Rimo Bacigalupi 1969-4-13 9325 Colusa floor of Bear Valley, along county road on boundary between Townships 15N and 14N Bear Valley Comment
  UCD64254  Castilleja exserta subsp. exserta Craig D. Thomsen 2000-3-31 2055 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  HSC85948  Castilleja exserta subsp. exserta Michalski, Raum, Hopson 1987-4-21 58 Colusa Leesville Rd. Comment
  CHSC112412  Castilleja foliolosa Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18642 Colusa Rocky serpentine outcrop on the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles west of Williams. 566 Comment
  CHSC114943  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa On the northside of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chaparral. 500 Comment
  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
  HSC45672  Castilleja foliolosa Stephen Plant 1978-4-22 207 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72142  Castilleja foliolosa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9574 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  JEPS81325  Castilleja miniata L. R. Heckard and J. C. Hickman 1982-7-6 5940 Colusa about 0.5 mi ne Summit Springs (s side of Snow Mt, e of trail); Snow Mt. 1645 Comment
  JEPS82554  Castilleja miniata L. R. Heckard 1983-7-27 6101 Colusa ca 2 mi w Stonyford road; Little Stony Creek 411 Comment
  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
  CHSC71451  Castilleja minor subsp. spiralis Vernon H. Oswald; Lowell Ahart 1998-7-15 9271 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  UCR40060  Castilleja rubicundula subsp. lithospermoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 27 Colusa Bear Valley, Brim Road, 2.9 mi west of Leesvillle-Lodoga Junction 418 Comment
  JEPS121116  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2013-5-1 18687 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
  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
  UCD57296  Castilleja rubicundula subsp. rubicundula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3667 Colusa BLM Payne Ranch. Near origin of Craig Canyon. Close to Thompson Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 349 Comment
  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
  UCD114214  Caulanthus flavescens W. C. Overton Jr. 1980-4-14 s.n. Colusa Into Bear Valley, ca. 1 mile N of junction of State Highway 16 and 20. Comment
  CAS-BOT-BC40506  Caulanthus lasiophyllus Mrs. H. C. Cantelow 1936-4-11 1163 Colusa Bear Creek Canyon. Comment
  CAS-BOT-BC40507  Caulanthus lasiophyllus Roxana S. Ferris 1917-4-12 504 Colusa 4 miles east of Wiliams. Comment
  CHSC22526  Ceanothus cuneatus Robert A. Schlising; Glenn Keator 1962-1-21 2032 Colusa Steep adobe bank and open hills. 548 Comment
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Mar 26 2014
  HSC47566  Ceanothus cuneatus J. P. Smith, J. O. Sawyer 1978-4-29 9768 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 Comment
  RSA399079  Ceanothus cuneatus Carolyn Sanford 1977-4-24 352 Colusa Above Barrel Springs Campground. 701 Comment
  UCD33934  Ceanothus cuneatus Beecher Crampton 1975-4-21 9165 Colusa Colusa County, 4 miles N.N.E. of Lodoga, grapevine summit. Comment
  UCD56939  Ceanothus cuneatus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3541 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CAS-BOT-BC50808  Ceanothus integerrimus Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-5-6 043 Colusa Blue Oak Campground - Left side of road just before reaching camp from highway 20 548 Comment
  JEPS82411  Ceanothus integerrimus L. R. Heckard 1969-5-28 Colusa ca 6 air mi w Stonyford (along Soney Creek near Fouts Springs) Comment
  UCD170262  Ceanothus integerrimus D. O. Burge 2016-11-3 2186 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 610 Comment
  UCD170264  Ceanothus integerrimus D. O. Burge 2016-11-3 2188 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 980 Comment
  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
  UCD82544  Ceanothus integerrimus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5699 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  HSC90407  Ceanothus jepsonii R. Cook, M. Lewis, L. Sims 1992-4-11 7 Colusa 1.0 mi S of Blue Oak Recreation Site on Walker Ridge Rd. 685 Comment
  UCD58112  Ceanothus jepsonii Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3376 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. East of Destanella. 576 Comment
  SEINET13945967 Image available Ceanothus jepsonii Thomas E. Higley 1974-1 69 Colusa 3/4 mi N of T junction ofIndian Valley; 2800 ft alt., T14N R6W SEC12 Comment
  RSA712418  Ceanothus jepsonii subsp. albiflorus C. L. schmidt 1989-5-6 1249 Colusa 1 mile up dirt road to Trout creek near Davis Campsite and Fouts Springs Campground, 9 miles W of Stonyford. Serpentine of E side of Snow Mtn. 600 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  HSC31403  Ceanothus jepsonii var. albiflorus Maralyn O'Meara, Gary S. Lester 1974-5-4 348 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC60452  Ceanothus jepsonii var. albiflorus J. P. Smith 1977-4-24 9036 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD81262  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5427 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
  HSC98207  Ceanothus oliganthus var. sorediatus Steven Lagos 1974-5-4 43 Colusa 747 Comment
  CHSC86117  Centaurea melitensis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  IRVC29846  Centaurea solstitialis Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4993 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  JEPS110383  Centaurea solstitialis Lowell Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR201558  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14255 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  POM53290  Centaurea solstitialis W. R. Mumma 1897-9-3 s.n. Colusa Grand Island Comment
  UCD61446  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3891 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  UCD66917  Centromadia parryi subsp. parryi Craig D. Thomsen; G. Harrington 2008-7-6 2784 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond ca. 0.2 miles to the south of Roadkill Cafe. 396 Comment
  CAS-BOT-BC271546  Centromadia parryi subsp. rudis A. A. Heller 1941-9-22 16331 Colusa Along U.S. Highway #99W between Williams and Maxwell Comment
  CHSC80151  Centromadia parryi subsp. rudis B. Castro; G. Kuenster 2000-7-19 1203 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. 41 Comment
  CHSC84391  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  JEPS118677  Centromadia parryi subsp. rudis B. Castro with Dave Bogener 2011-9-1 1912 Colusa Sacramento Valley. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Moulton Weir 7.5' quad. Comment
  JEPS118719  Centromadia parryi subsp. rudis B. Castro with Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UC1069558  Centromadia parryi subsp. rudis H. S. Yates 1936-8-14 17575 Colusa 3 mi s Colusa Comment
  UCD130150  Centromadia parryi subsp. rudis P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  UCD77502  Centromadia parryi subsp. rudis Robert E. Preston 1999-9-24 1242 Colusa Antelope Valley, at head of Salt Canyon. 219 Comment
  CAS-BOT-BC279208  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  CAS-BOT-BC279212  Centromadia pungens subsp. pungens David D. Keck 1933-5-30 2402 Colusa 1.8 miles west of Colusa on road to Williams 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
  UC931956  Cephalanthus occidentalis var. californicus Verne Grant and Alva Grant 1946-8-6 7839 Colusa near Colusa (Butte Creek bank, 1 mi n of Butte Outing Gun Club); Butte Creek Comment
  UCD163000  Cerastium glomeratum Craig D. Thomsen 2000-3-31 2164 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC84633  Cercis occidentalis Matt Quinn 2001-3-31 38 Colusa Found along drainage flowing out of Bear Valley, near Wilbur Hot Springs, north of Highway 20. 405 Comment
  HSC71297  Cercis occidentalis Thomas W. Nelson, Jane P. Nelson 1979-4-12 4629 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCR37606  Cercis occidentalis C. Houseman, M. A. Strull, L. Linstedt 1984-4-29 14 Colusa Bear Valley Rd., 2 mi north of Hwy 20 366 Comment
  CHSC1542  Cercocarpus betuloides E. Gabel 1935-5-10 Colusa Stonyford. 335 Comment
  CAS-BOT-BC136987  Cercocarpus betuloides var. betuloides Roxana S. Ferris 1926-4-23 6419 Colusa Grade beyond Mountain House on Williams - Stonyford Road Comment
  UC1543051  Cercocarpus betuloides var. betuloides Donald G. Nelson et. al. 1940-6-8 679 Colusa several mi above Bonnie View (w boundary of Snow Mountain, Snow Mountain Trail); Snow Mountain, Snow Mountain Trail 1066 Comment
  UCD70292  Cercocarpus betuloides var. betuloides D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 450 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
  UCD159334  Chaenactis glabriuscula D. S. Park; E. Dean 2010-6-5 118 Colusa Walker ridge, Cold Spring Mt. Exposed serpentine outcrop. 1032 Comment
  UCD57299  Chaenactis glabriuscula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3670 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  HSC45751  Chaenactis glabriuscula var. glabriuscula Sheila Logan 1978-4-22 82 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CAS-BOT-BC284537  Chaenactis glabriuscula var. heterocarpha Annetta Carter 1938-5-8 1394 Colusa Bear Creek Canyon, 4 miles southeast of Wilbur Springs, Inner North Coast Range Comment
  UCD82735  Chaenactis glabriuscula var. heterocarpha Craig Thomsen; G. Harrington 2009-5-14 2916 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
  JEPS75724  Cheilanthes gracillima L. R. Heckard 1974-9-9 3859 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt 1828 Comment
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  CHSC77561  Chenopodium album Heidi West; Jenny Marr, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Salt Lake and Sites. 97 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
  UC72555  Chenopodium ambrosioides H. P. Chandler 1905-9-14 Colusa Princeton 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
  RSA718051  Chenopodium botrys L. Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  JEPS75836  Chenopodium pumilio L. R. Heckard 1974-9-11 3951 Colusa edge of meadow just e Foutch Camp; Snow Mt. 1859 Comment
  UCD168862  Chenopodium strictum var. glaucophyllum John Anderson 2015-1 s.n. Colusa about 0.5 mile north of Colusa Casino west of Highway 45. Comment
  JEPS80466  Chimaphila menziesii Alice Q. Howard 1972-7-10 8 Colusa wet mossy spring area crossing trail from Fouts Camp to Box Springs (highest of 2 areas on n. side of ridge separating Trout & Paradise Creeks); Snow Mt. 1676 Comment
  UCD57921  Chloris gayana Beecher Crampton 1958-6-27 4980 Colusa 2.5 miles south of Grimes. Comment
  UCD57927  Chloris gayana Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  SEINET4565689  Chloris virgata M. J. Williams 1981-9-2 81- 162 -1 Colusa Near an almond orchard on Wisconsin Avenue, south of Arbuckle Comment
  UCD63102  Chlorogalum pomeridianum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4933 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  CAS-BOT-BC238007  Chloropyron palmatum Dean Wm. Taylor 1988-8-8 10024 Colusa Sacramento Valley. Colusa National Wildlife Refuge, in the far SE corner of the Refuge along Ohm Road 1 mile N of Ware Road 22 Comment
  SEINET10745049  Chloropyron palmatum R. Stinchfield 1916-6-17 Stinchfield 284 Colusa In alkaline soil, overflowed lands at Tule near College City Comment
  HSC45743  Chorizanthe membranacea Stephen Plant 1978-4-22 216 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC638667  Chorizanthe membranacea Ethel Crum 1938-5-7 2015 Colusa 4.2 mi n Rumsey (Comanche Hills); Inner North Coast Range, Comanche Hills 254 Comment
  HSC65996  Chorizanthe membranacea D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 43 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  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
  CHSC88587  Cirsium douglasii var. breweri L. P. Janeway; B. Castro 2001-6-3 7099 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. 884 Comment
  JEPS81287  Cirsium occidentale var. venustum L. R. Heckard and J. C. Hickman 1982-7-5 5898 Colusa slope below (s of) area Summit Springs (s side of mountain); Snow Mt., Summit Springs 1500 Comment
  UCD57628  Cirsium occidentale var. venustum Michele Lanctot; 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. Northern edge of trail. 361 Comment
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  UCD81256  Cirsium vulgare Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5421 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD57862  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 49 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  UCD105130  Clarkia G. L. Stebbins Jr.; M. A. Nobs, J. A. Rattenbury 1947-4-27 3735 Colusa 3 miles W of Leesville, on road to Bartlett Springs. Comment
  CHSC83595  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate. 124 Comment
  CHSC86125  Clarkia affinis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UCR39819  Clarkia affinis P. Williams, Mike Malamus, Brian Kearney 1984-4-28 72 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  CDA37986  Clarkia affinis T. C. Fuller 1958-5-28 s.n. Colusa Highway 20, 2 miles west of junction with Highway 16. 0 Comment
  UCD104016  Clarkia affinis Grady L. Webster 1977-5-15 7682 Colusa Along Bear Creek, ca. 2 mile W of Route 20 along Wilbur Springs Road. 365 Comment
  CDA38051  Clarkia concinna T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  SJSU11006  Clarkia concinna subsp. concinna J. B. Willis Jr 1969-5-31 200 Colusa by State Hwy 20, 0.5 mi W of junction with Hwy16 c. midway between Williams & Clear Lake Comment
Read comments
Aug 26 2011
  CAS-BOT-BC164528  Clarkia gracilis subsp. albicaulis Richard A. DeMartile 1983-6-15 107 Colusa Bartlett Springs Road north of Baldy Mountain Comment
  LA47307  Clarkia gracilis subsp. albicaulis Francia Chisaki; Helen Sharsmith 1959-5-27 1339 Colusa about 0.25 mi. E of Cooks Spring Comment
  UCD63108  Clarkia gracilis subsp. gracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4939 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  UCR212337  Clarkia gracilis subsp. tracyi Craig D. Thomsen 2001-5-24 2504 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
  JEPS43724  Clarkia purpurea subsp. purpurea Alice King 1906-1-1 Colusa College City Comment
  CAS-BOT-BC240292  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs 817 Comment
  UC125400  Clarkia purpurea subsp. quadrivulnera Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City); Sacramento Valley Comment
  UCD64427  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2201 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82122  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5650 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR212340  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2201 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  CHSC72453  Clarkia rhomboidea L. P. Janeway; Dave Isle 1998-7-3 5707 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. On road cutbank. 1051 Comment
  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
  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
  UC1051500  Claytonia exigua subsp. exigua Helen K. Sharsmith 1953-6-19 4281 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  CHSC86523  Claytonia parviflora subsp. parviflora B. Castro; Beth Hendrickson 2003-3-19 1392 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  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
  UC1745698  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1379 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  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
  UCD65634  Claytonia perfoliata Craig D. Thomsen 2000-4-12 2137 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS86631  Claytonia perfoliata L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6691 Colusa parking area for trail to Snow Mountain Peaks 1625 Comment
  UCD100555  Claytonia saxosa A. M. Shapiro 1994-6-12 s.n. Colusa at road junction just below summit of Goat Mountain. Comment
  SFV8355  Clematis lasiantha D. Grau 1972-4-1 4 Colusa Highway 16, 5 miles south of junction with Highway 20. Comment
  UC629760  Collinsia bartsiifolia var. bartsiifolia Ethel Crum 1938-5-8 2020 Colusa 3 mi n Leesville 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
  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
  UCD123553  Collinsia greenei G. Ledyard Stebbins Jr. 1964-7-4 6170 Colusa northeast side of Mt. St. John, west of Stonyford. 1524 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
  UCD56670  Collinsia sparsiflora Jack Alderson 2007-3-25 6 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 559 Comment
  CHSC70908  Collinsia sparsiflora var. arvensis Vernon Oswald; Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodga Rd. 4.2 mi south of Stonyford. 384 Comment
  POM273490  Collinsia sparsiflora var. arvensis Lyman D. Benson 1933-4-16 4332 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  HSC44465  Collinsia sparsiflora var. collina R. York 1978-4-22 140 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 409 Comment
  UC1736363  Collinsia sparsiflora var. collina Dean W. Taylor 1992-4-16 12404 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek 411 Comment
  UC638654  Collinsia sparsiflora var. collina Ethel Crum 1938-5-8 2029 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD57622  Collinsia sparsiflora var. collina Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  UC638655  Collinsia sparsiflora var. sparsiflora Ethel Crum 1938-5-8 2028 Colusa 3 mi n of Leesville (Inner North Coast Range); Inner North Coast Range Comment
  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
  CHSC48648  Collomia diversifolia Vernon Oswald 1984-5-2 1167 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18N01) 5.7 mi w of Stonyford. On a road cut. 609 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
  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
  UCD81856  Collomia diversifolia Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5740 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
  CDA40008  Collomia diversifolia Vernon H. Oswald & Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Road 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat roads. Comment
  JEPS15537  Collomia tinctoria G. Thomas Robbins with L. R. Heckard 1956-7-25 3695 Colusa open rocky slope in woods on ridge above Fouts Camp (along trail to Snow Mt. (about 1 1/2 mi airline se of summit), on Lake-Colusa County boundary) 1920 Comment
  JEPS80138  Collomia tinctoria L. R. Heckard with J. Hickman 1980-7-2 5298 Colusa just above Summit Spring entrance to Snow Mt. trail (ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1630 Comment
  UC1051512  Collomia tinctoria Helen K. Sharsmith 1953-7-1 4402 Colusa Linger Longer Camp Inner North Coast Ranges, Mendocino National Forest (Goat Mountain) 1584 Comment
  UCD72535  Conium maculatum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3826 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.25 mile downstream of bridge. 246 Comment
  CHSC13499  Convolvulus arvensis L. V. Ritter 1969-4-30 217 Colusa Ca 6 mi. sw of Williams, w side of Highway 20. Comment
  CHSC67606  Cordylanthus palmatus James D. Jokerst 1988-8-23 3036 Colusa Delevan National Wildlife Refuge S of Willows, in Cell 12. Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  JEPS99065  Cordylanthus palmatus Dean W. Taylor 1988-8-8 10024 Colusa Colusa National Wildlife Refuge, far southeastern corner of Ohm Rd, 1 mi n of Ware Rd 22 Comment
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  UC496162  Cordylanthus palmatus Roxana Stinchfield 1916-7-17 284 Colusa near College City; ; near College City, Colusa Co. Comment
  NY28941  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  CDA16105  Cordylanthus pilosus G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15248 Colusa North Coast Ranges; Cedar Camp- Goat Mtn. Rd. 792 Comment
  UCD123116  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  SFV8758  Cornus glabrata J. K. Clark 1966-5-8 23 Colusa On Lodoga to Stongford Road, 2.5 miles northwest of Lodoga. 320 Comment
  UCD67592  Cornus glabrata Charles Martin 1986-5-17 30 Colusa Along Fouts Spring Rd., 2.8 miles W of Stonyford, along roadside. Growing along small stream, soil dry, in direct sunlight. Small shrub, ca. 1m tall, flowers small, white. Comment
  JEPS75756  Cornus sericea subsp. sericea L. R. Heckard and R. Bacigalupi 1976-9-6 4438 Colusa at margin of Trout Creek at trail crossing Snow Mt. 1828 Comment
  JEPS75866  Cornus sericea subsp. sericea L. R. Heckard 1974-9-10 3882 Colusa along East Circle Trail Snow Mt. (along spur running s.e. from West Peak) 2011 Comment
  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
  CHSC53932  Cotula coronopifolia Vernon H. Oswald 1991-4-21 4524 Colusa Two Mile Rd, 3.7 mi south of Maxwell Colusa Rd. Along road through rice fields. 27 Comment
  JEPS118675  Cotula coronopifolia B. Castro, L. P. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UC75673  Crassula connata var. erectoides Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley 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
  CHSC61424  Croton setiger Vernon H. Oswald 1993-8-16 5805 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W1/4 of Tract 44, near the S boundary of the refuge. Field on the N side of Hunters Creek. 24 Comment
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC94477  Croton setiger Lowell Ahart 2006-8-9 13114 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCR205144  Croton setiger George K. Helmkamp, E. A. Helmkamp 2008-10-14 14249 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SACT000805  Crypsis aculeata Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa Comment
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  JEPS110415  Crypsis schoenoides Lowell Ahart 2006-8-9 13096 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCD59814  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. 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
  RSA126601  Crypsis vaginiflora H. S. Yates 1936-8-14 6136 Colusa 6 miles S. of Grimes 15 Comment
  UC1146681  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa junction of Bear Creek and Sulphur Creek (bridge over Bear Creek, near Sulphur Springs); North Coast Ranges Comment
  UC1950107  Crypsis vaginiflora Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga Comment
  UCD56918  Cryptantha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3521 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  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
  CAS-BOT-BC218808  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Creek canyon n. of Highway 20 (near Wilbur Springs), on barren crumbled shale Comment
  JEPS80196  Cryptantha flaccida L. R. Heckard and J. Hickman 1980-7-3 5350 Colusa ca 10 mi w Stonyford (just w of Summit Springs sw Snow Mt.); Snow Mt. 1548 Comment
  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
  HSC48141  Cryptantha hispidula Thomas W. Nelson, Jane P. Nelson 1978-4-30 3969 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  UCD63124  Cryptantha hispidula Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4954 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  SEINET7883435 Image available Cryptantha hispidula Leo Koch 1940-1 936 a Colusa Serpentine hill near Lake and Colusa county line along Highway 20, Williams Highway Comment
  CHSC146  Cryptantha intermedia V. Holt 1935-5-17 Colusa Stonyford. Comment
  UC857152  Cryptantha intermedia Alice Eastwood and John Thomas Howell 1938-5-16 5629 Colusa Lake-Colusa county line on road to Williams 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
  UC1177888  Cryptantha intermedia Peter M. Ray 1950-4-15 1713 Colusa road 3 mi e Stony Creek Bridge (s side of canyon of Big Stony Creek); Big Stony Creek Comment
  UC78682  Cryptantha microstachys K. Brandegee Apr 1889 Colusa Epperson's Comment
  UC726039  Cryptantha microstachys A. A. Heller 1940-6-7 15713 Colusa ridge e of Lodogo (just above the road leading to Sites) Comment
  CDA15473  Cryptantha muricata G. F. Hrusa, WTD 1998-6-19 14610 Colusa North Coast Ranges; Ridge above Little Stony Creek drainage on Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). Comment
  UC1212061  Cryptantha muricata C. R. Bell 1950-4-26 770 Colusa w of Leesville (on road to Bartlett Springs, halfway up e side of county-line ridge) Comment
  UCD84450  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6058 Colusa Walker Ridge. Along Walker Ridge Rd, E side of road in turnout. Just past Pinus attenuata groves. 981 Comment
  UC78654  Cryptantha rostellata Katharine Curran May 1884 Colusa Leesville Comment
  JEPS80390  Cryptantha simulans L. R. Heckard and J. Hickman 1981-6-22 5623 Colusa Dark Hollow trail Snow Mt. 1935 Comment
  UC1299423  Cryptantha simulans Freed W. Hoffman 1947-6-19 1620 Colusa road from Stonyford to Fouts Springs (w Colusa County); North Coast Ranges 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
  UC1051501  Cryptantha torreyana Helen K. Sharsmith 1953-6-19 4282 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  JEPS13746  Cupressus macnabiana Frank W. Gould 1939-4-8 631 Colusa 1.5 mi w of Colusa County line (on road to Lucerne) Comment
  RSA589940  Cupressus macnabiana Michael A. Vincent, Robert Rhode 1996-3-30 7307 Colusa Along Walker Ridge Road, 1.0 miles S of junction with Brim Road Comment
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CAS-BOT-BC80806  Cupressus sargentii C. B. Wolf; E. R. Johnson 1934-10-15 6189 Colusa [Cook] Cooks Springs, western part of county 548 Comment
  CAS-BOT-BC80807  Cupressus sargentii Hugh Leech 1971-10-9 s.n. Colusa [Cook's] Cooks Springs Comment
  CHSC62835  Cupressus sargentii Vernon H. Oswald; Lowell Ahart 1994-3-23 6010 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  NY16797  Cupressus sargentii C. B. Wolf 1934-10-15 6189 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UC1116696  Cuscuta californica Beecher Crampton 1961-7-20 5935 Colusa 4 mi se Grimes (along Knight's Landing Road) Comment
  SBBG115554  Cuscuta californica var. californica B. Crampton 1961-7-20 5935 Colusa 4 mi SE of Grimes, along Knight's Landing Rd Comment
  UCD67007  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2740 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  UCD126319  Cuscuta indecora var. indecora Herbert L. Mason; Verne Grant 1946-8-6 12974 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  JEPS90814  Cuscuta salina Dean W. Taylor 1993-8-31 14072 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  RSA313623  Cycladenia humilis Brandegee 1892-6-23 s.n. Colusa Snow Mountain Comment
  SEINET3157202  Cycladenia humilis T. S. Brandegee 1890-6-23 sn Colusa Snow Mountain Comment
  CHSC32212  Cycladenia humilis var. humilis James Jokerst 1980-8-7 1063 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
Read comments
Jun 8 2007
  UC1151661  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 mi s College City Comment
  SEINET11262863  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites Logoda Road ca 4.7 miles NE of Logoda on the W end of Grapevine Pass.; 0 527 Comment
  UCD56936  Cynoglossum grande Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3538 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CHSC112020  Cynoglossum grande David Isle 1977-4-5 2069 Colusa Mendocino National Forest. About 1.3 mile NE of Fouts Springon Upper Davis Flat. 493 Comment
  UCD61465  Cynosurus echinatus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3911 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  CAS-BOT-BC114782  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles N of Colusa between Sacramento River and Butte Creek. Comment
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. 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
  UC698628  Cyperus difformis P. B. Kennedy 1925-9-18 Colusa Cortena, Colusa Comment
  UCD141006  Cyperus difformis V. C. Bryant 1931-6-24 2205 Colusa Colusa. Comment
  UCD141008  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 miles west of Williams. Comment
  JEPS110394  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC1100527  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13117 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UCD54036  Cyperus eragrostis K. Esau; D. Hartmenn 1941-7-17 s.n. Colusa near Williams. Comment
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  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
  UC72520  Cyperus erythrorhizos H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD141054  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  UCD141052  Cyperus erythrorhizos P. B. Kennedy 30-31 May 1922 s.n. Colusa Exact location unknown. Comment
  POM313098  Cyperus odoratus H. L. Mason 1945-9-19 12721 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  RSA107118  Cyperus squarrosus G. Thomas Robbins, L. R. Heckard 1956-7-25 3701 Colusa Lake - Colusa county boundary. Pond in meadow at eastern base of ridge that forms a southeastern extension of Snow Mountain West, about 1/2 mile airline from its summit 1982 Comment
  POM313066  Cyperus strigosus S. Galen Smith 1949-9-9 1871 Colusa Rice fields 3 miles west of Williams Comment
  UCD141160  Cyperus strigosus Malcolm A. Nobs; S. Galen Smith 1949-9-9 1871 Colusa 3 miles west of Williams. Comment
  CAS-BOT-BC445508  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  UCD18854  Damasonium californicum Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 162 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  POM208489  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Sacramento Valley. Comment
  RSA91938  Damasonium californicum Beecher Crampton 1953-4-29 1148 Colusa 7 miles E of Maxwell. Comment
  JEPS75727  Danthonia californica L. R. Heckard 1974-9-9 3863 Colusa around spring and small stream just ne rocky promontory southeast of Foutch Camp; Snow Mt. 1798 Comment
  CHSC105487  Danthonia californica var. californica B. Castro; L. P. Janeway 1999-7-5 1015 Colusa Ca. 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. NNW-facing slope W of Lovelady Ridge Rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  CHSC106228  Danthonia californica var. californica B. Castro; L. P. Janeway 2001-6-3 1253 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  JEPS95650  Datisca glomerata Vernon H. Oswald and L. Ahart 1999-6-22 9787 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. Herbaceous perennial ca. 1 m tall on the rocky bank of Little Stony Creek. 426 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
  UCD58171  Datisca glomerata Gordon Harrington 2007-5-31 61 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
  UCR257972  Datisca glomerata Gordon Harrington 2007-5-31 061 Colusa BLM Payne Ranceh. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, c. 1 mi downstream from Road Kill Cafe 337 Comment
  JEPS120797  Datura stramonium var. tatula Lowell Ahart 2013-10-1 19083 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  RSA724817  Datura wrightii L. Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1.5 miles (air) east of East Park Reservoir, about 4.5 miles (air) northeast of Lodoga. 546 Comment
  POM174571  Daucus pusillus Roxana S. Ferris 1926-4-23 6587 Colusa 2 miles from Stony Ford. Comment
  UCR254940  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodoga 370 Comment
  JEPS80053  Delphinium antoninum L. R. Heckard and J. Hickman 1979-6-15 5053 Colusa ne slope West Peak ridge (cirque between peaks); Snow Mt. 1981 Comment
  JEPS80112  Delphinium antoninum L. R. Heckard with J. Hickman 1980-7-1 5271 Colusa cirque between West Peak and East Peak ((ca 10 mi w of Stonyford)); Snow Mt. 1950 Comment
  CDA15469  Delphinium hesperium subsp. pallescens G. F. Hrusa, T. D. Wilfred 1998-6-19 14606 Colusa North Coast Ranges; Scattered perennial on steep slope within chaparral above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Flowers blue, other plants nearby range to light blue and pinkish. Crown attachment firm. Comment
  CHSC83252  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley. Comment
  CHSC86969  Delphinium hesperium subsp. pallescens B. Castro 2003-5-14 1434 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. 158 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
  HSC45441  Delphinium hesperium subsp. pallescens M. Alcasas 1978-4-23 58 Colusa Bartlett Springs Rd., 0.5 mi. from junction with Bear Valley Rd 457 Comment
  SBBG2159  Delphinium hesperium subsp. pallescens H. and M. Dearing 1933-5-24 399 Colusa 20 mi W of Williams Comment
  HSC25000  Delphinium nudicaule M. Dole 1963-4-15 60 Colusa 7 mi. S of junction of Hwy. 16 and Hwy 20 on Hwy. 16 Comment
  RSA232955  Delphinium nudicaule D. A. Young 1969-5-4 321 Colusa 10 miles W of Wilbur Springs, along Hwy 16. 610 Comment
  HSC24968  Delphinium patens M. Dole 1963-4-15 30 Colusa 6 mi. S of the junction of Hwys. 16 and 20 on Hwy. 16 Comment
  HSC72154  Delphinium patens J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9567 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  POM149761  Delphinium patens Roxana S. Ferris 1917-4-14 550 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC35564  Delphinium patens subsp. patens J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9567 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  UC1585383  Delphinium uliginosum R. Raiche 1989-6-20 90163 Colusa near Eaton Spring (w of Williams, n of Wilbur Springs); Walker Ridge, Deadshot Flat 710 Comment
  CHSC46049  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  UCR55542  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa About 200 yd west of road; on road along Bear Creek from State Hwy 20 N to Leesville, 3.6 mi north of Wilbur Springs turnoff Comment
  SEINET5338169  Delphinium variegatum M. J. Williams 1967-5-7 s.n. Colusa Bear Valley. 396 Comment
  SEINET5338170  Delphinium variegatum W. Roderick 1967-5-7 s.n. Colusa Bear Valley. 305 Comment
  SEINET5718465 Image available Delphinium variegatum Robert A. Christison 1960-1 29 Colusa On State Hwy 16, ca. 3 miles from Yolo-Colusa county border. 183 Comment
  UCD14291  Delphinium variegatum L. Coats 1983-4-24 12 Colusa Colusa Co.; in the hills at the south end of Bear Valley; along Bear Valley Road, 6.3 miles south of Bartlett Springs Road; 487 Comment
  UCD14297  Delphinium variegatum Nelson Cronyn 1984-4-22 5 Colusa Colusa Co.; 3.2 miles north of Highway 20 on Bear Valley Road; 381 Comment
  UCD15287  Delphinium variegatum Claire Warshaw 1985-4-13 7 Colusa along Bear Valley Road, 8 miles norhtwest from intersection with highway 20; 390 Comment
  UCD23390  Delphinium variegatum Stephanie Mayer 1977-5-8 33 Colusa Deep blue violet showy sepals with one spur, petals white tinged with violet. Dense woody shallow roots with erect herbaceous stem. Plants occurring in large numbers. Valley grassland in open field with dry clay loam. 9.5 miles north from junction with Highway 20 on Bear Valley Road. Comment
  UCD23392  Delphinium variegatum Patrick Fox 1977-5-8 20 Colusa Open field 9.5 miles north of Highway 20 on Bear Valley Rd. Comment
  UCD96729  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa 200 yards west of road, on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  CAS-BOT-BC16955  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-11 1210 Colusa Bear Creek Canyon Comment
  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
  UC583162  Delphinium variegatum subsp. variegatum Lewis S. Rose 1936-4-27 36177 Colusa hills 10 mi nw Rumsey 213 Comment
  CAS-BOT-BC16954  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-27 36177 Colusa 10 mi. NW of Rumsey 213 Comment
  HSC96712  Delphinium variegatum subsp. variegatum Kay Izlar 2001-4-21 5 Colusa Bear Valley Rd. off Hwy. 20 415 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
  CHSC107972  Deschampsia danthonioides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1855 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. Towards north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in drying vernapool bottom. 49 Comment
  HSC9599  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa 3 mi. S of Arbuckle Rd. on the Pacific Hwy. Comment
  UC188868  Deschampsia danthonioides Miss M. Alice King 1905-1 Colusa near College City College City; Sacramento Valley Comment
  UCD163709  Deschampsia danthonioides Craig Thomsen 1999-5-10 2021 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD66526  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2326 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection. 340 Comment
  UCR212334  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), 0.5 mi west of Hwy 20/16 intersection, (c. 0.3 mi. east of Hwy 20 'Vista Point'). 345 Comment
  SEINET10909286  Deschampsia danthonioides Roland McKee 1918-5-1 McKee s.n. Colusa Princeton. 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
  UCD164163  Descurainia sophia Craig Thomsen 2008-3-20 2719 Colusa Payne Ranch (Bear Creek Ranch) BLM. Hwy 16 about 0.25 mile south of junction with Hwy 20. Comment
  UC1053476  Dicentra chrysantha Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3179 Colusa just w Bear Valley (slope just w of base of grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  JEPS80436  Dichelostemma capitatum L. R. Heckard, and J. Hickman 1980-7-1 5290 Colusa trail from Summit Springs to Frog Pond (Colusa-Lake County boundary); Snow Mt. 91 Comment
  HSC71291  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-11 4616 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  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
  UC1334721  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa between Williams and Clear Lake (Hwy 20) 152 Comment
  CHSC93753  Dichelostemma volubile Richard R. Halse 1989-5-7 3826 Colusa Along the Leesville Road ca. 3 miles SE of Leesville. 480 Comment
  UCD57620  Dichelostemma volubile Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  CAS-BOT-BC503139  Dichelostemma volubile David D. Keck 1933-5-30 2400 Colusa 1 mile east of Lake County line, west of Wilbur Springs, on south slope. Comment
  CAS-BOT-BC503140  Dichelostemma volubile David D. Keck 1933-5-30 2400 Colusa 1 mile east of Lake County line, west of Wilbur Springs, on south slope. Comment
  UCD139273  Dichelostemma volubile Carl Pfeiffer 1978-5-6 23 Colusa Bear Valley, Walker Ridge, 0.1 mile south of Bartlett Springs Road. 670 Comment
  CHSC32197  Dieteria canescens var. shastensis James Jokerst 1980-8-8 1084 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UC1100289  Digitaria ischaemum Herbert L. Mason 1945-9-19 12722 a Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink spillway Comment
  POM313166  Digitaria sanguinalis H. L. Mason 1945-9-19 12722 b Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  RSA725022  Digitaria sanguinalis L. Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  SEINET199008  Diplacus layneae Helen K. Sharsmith 1953-1 4290 Colusa Mendocino Nat For; In metamorphic rubble of forest clearing, 5 mi beyond Trough Springs on rd to Goat Mt. 1280 Comment
  CHSC107945  Distichlis spicata B. Castro; L. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In south half of the marsh, especially its outer edges, and up into swale to the north. 49 Comment
  CHSC114987  Distichlis spicata Lowell Ahart 2015-5-5 20116 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  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
  CDA32963  Distichlis spicata Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  UCD64465  Distichlis spicata var. stricta Beetle 1946-6-27 4686 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  CHSC116063  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UCD112600  Dodecatheon hendersonii Christopher Mallek 2008-4-17 WR2- 5 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 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
  UCR70827  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford 305 Comment
  SEINET215100 Image available Dodecatheon hendersonii Laurie E. Miller 1973-4-15 15 Colusa Walker Ridge hunting access road, 1 mile from State Highway 20. Comment
  CHSC29750  Downingia insignis K. R. Stern 1980-6-1 6637 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC60673  Downingia insignis Vernon H. Oswald 1993-4-14 5264 Colusa N side of O'Hair Rd., just E of the headquarters buildings, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CHSC79145  Downingia insignis B. Crampton 1953-4-29 1145 Colusa Along the road, about 3 miles east of Maxwell. Comment
  UC1609312  Downingia insignis Vernon H. Oswald and Lowell Ahart 1993-5-27 5428 Colusa ca 0.5 mi nw Sites (Sites-Lodoga Rd, Sacramento Valley); Sacramento Valley 121 Comment
  UC625519  Downingia insignis Frank W. Gould 1938-4-23 295 Colusa between Arbuckle and Williams Comment
  POM312375  Downingia insignis H. L. Mason 1953-4-5 14506 Colusa 3 miles east of Maxwell Comment
  CHSC27583  Downingia pulchella Timothy Spira; Robert Schlising 1978-5-13 3248 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (=Wilbur Springs) Road. Comment
  POM59020  Downingia pulchella A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near College City. Comment
  RSA261511  Downingia pulchella L. L. Ferwerda 1968-5-4 17 Colusa In Bear Valley, ca. 11 miles NW of State hwy 20. 409 Comment
  UC2048629  Downingia pulchella Lisa Schultheis with Ewald Weber 1995-6-3 203 -95 Colusa Bear Valley. Comment
  UCD163881  Drymocallis glandulosa Craig D. Thomsen 2002-3-27 2579 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.25 mile west of Hwy 20/16 instersection. Comment
  CHSC112645  Dysphania botrys Lowell Ahart 2013-10-1 19087 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
  CHSC94479  Dysphania botrys Lowell Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC112622  Dysphania pumilio Lowell Ahart 2013-10-1 19086 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS120706  Dysphania pumilio Lowell Ahart 2013-10-1 19086 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
  SEINET241777 Image available Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa 4.5 miles south of Grimes Comment
  UCD32928  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa Colusa County, 4.5 miles south of Grimes. Comment
  UCD34847  Echinochloa crus-galli Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCD60931  Echinochloa crus-galli Beecher Crampton 1963-9-9 6889 Colusa 1/4 mile E of Cortena, site of UC temporary rice experiment station 1923-1928. Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  UCD61166  Echinochloa oryzicola var. mutica P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. Comment
  CHSC84967  Echinodorus berteroi Lowell Ahart 2003-10-23 10671 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  RSA518796  Echinodorus berteroi Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8879 Colusa NW side of East Park Reservoir near end of East Park Road form Stonyford. 366 Comment
  CAS-BOT-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
  UC1192122  Eclipta prostrata Herbert L. Mason and Verne Grant 1946-8-7 12985 Colusa 8 mi n Colusa; Butte Sink Comment
  UCD131244  Eclipta prostrata H. L. Mason 1945-9-19 12725 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  CAS-BOT-BC291141  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  UCD18848  Eleocharis macrostachya Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 156 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
  POM198509  Eleocharis palustris Roxana Stinchfield 1916-7-11 453 Colusa Colusa - Williams Road at Trough Comment
  CHSC84216  Eleocharis parishii Lowell Ahart 2003-7-14 10382 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  UCR198135  Eleocharis parishii Ellen Dean, Gordon Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3904 Colusa Payne Ranch (owned by BLM), lands to the southwest of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek, c. 1.0 mi southwest of parking lot 390 Comment
  JEPS80181  Elymus elymoides subsp. elymoides L. R. Heckard with J. Hickman 1980-7-3 5333 Colusa just w Summit Springs (ca 10 mi w of Stonyford, sw Snow Mt., Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  UCD82486  Elymus glaucus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  JEPS75758  Elymus glaucus subsp. glaucus L. R. Heckard and R. Bacigalupi 1976-9-6 4441 Colusa just e Fouts Camp; Snow Mtn. 1859 Comment
  UCD72393  Elymus glaucus subsp. glaucus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5119 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern part of ranch, upslope of confluence of Bear and Cache Creeks. Along old hunting camp road southeast (downslope) of junction with ridge trail. 384 Comment
  CAS-BOT-BC228536  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CAS-BOT-BC228537  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville Comment
  UCD67001  Elymus multisetus Craig D. Thomsen 2008-5-23 2738 Colusa BLM Payne Ranch. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  JEPS477  Elymus trachycaulus W. L. Jepson 1938-6-9 18955 Colusa w slope of mts. between Indian Valley (Lake Co.) and Bear Valley (Colusa County) 579 Comment
  UCR257974  Elymus trachycaulus Ellen Dean, Craig D. Thomsen, Gordon Harrington, R. Wilmarth, R. Wenk 2010-6-2 6067 Colusa On Lake County border. Walker Ridge, along Walker Ridge Road, Buck Flat 873 Comment
  CHSC110861  Emmenanthe penduliflora David Isle; Rhonda Isle 2013-5-19 2041 Colusa 0.1 mi W of Maxwell Grade Summit; burned NW asp. S of Sites Lodoga Road. 7/12 Sites Fire Area. 10S 0546355E 4355688N. 548 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
  JEPS110405  Epilobium brachycarpum Lowell Ahart 2006-8-22 13218 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  UCD105289  Epilobium brachycarpum C. F. Dunshee 1922-7-28 22 Colusa Cortina. Comment
  JEPS75838  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-11 3954 Colusa along Summit Springs trail Snow Mt.; , Summit Springs trail 1737 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
  JEPS80388  Epilobium densiflorum L. R. Heckard and J. Hickman 1981-6-22 5621 Colusa big meadow along creek Snow Mt., Dark Hollow Creek 1889 Comment
  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
  UCD82627  Epilobium foliosum Craig Thomsen; G. Harrington 2009-5-12 2898 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UC980843  Epilobium hallianum Kenneth Bradshaw 1953-9-9 Colusa near Board Camp Ridge (w Colusa Co.); Mendocino National Forest, Summit Valley 1676 Comment
  CHSC112253  Epilobium minutum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18649 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
  CHSC27709  Epilobium minutum Tim Spira; Robert A. Schlising 1978-5-13 3232 Colusa Just E of Lake County line, along Hwy 20. 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
  UCD81733  Epilobium minutum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5735 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
  POM256523  Epilobium minutum E. K. Crum 1938-5-8 2026 Colusa 3 miles north of Leesville. Comment
  CHSC101430  Epilobium nivium David Isle 1990-6-6 1527 Colusa On Lower Summit Valley Rock Outcrop W of Rd 17N10. 1682 Comment
  CHSC106240  Epipactis gigantea B. Castro; L. P. Janeway 2001-6-3 1257 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. At upper edges of meadow. 880 Comment
  CAS-BOT-BC58020  Equisetum Roxana S. Ferris 1926-4-21 6312 Colusa Near Sycamore. Comment
  CHSC94421  Equisetum arvense Lowell Ahart 2006-8-22 13211 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724896  Equisetum laevigatum L. Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC213552  Eragrostis hypnoides Roxana Stinchfield 1916-7-8 383 Colusa In bed of Sycamore Slough. 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
  RSA0105552  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 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
  UC1100248  Eragrostis hypnoides Herbert L. Mason 1945-9-19 12717 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway Comment
  UC1950146  Eragrostis hypnoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8878 Colusa NW side of East Park Reservoir near end of East Park Road from Stonyford Comment
  CHSC115631  Eragrostis hypnoides David Isle; Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~ 100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  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
  CHSC94425  Eragrostis pectinacea var. pectinacea Lowell Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1212582  Eriastrum brandegeeae Francia Chisaki and Helen Sharsmith 1959-5-27 1332 Colusa at Mill Creek crossing on road out of Red Bridge Camp Inner North Coast Ranges Comment
  CAS-BOT-BC515192  Eriastrum tracyi Volney Rattan 1881-6-1 s.n. Colusa Stony Creek. Coast Mountains north of San Francisco Bay Comment
  CDA11387  Ericameria linearifolia G. F. Hrusa, K. van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges; Walker Ridge Road approximately 3 miles N of Highway 20. 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
  RSA671050  Ericameria linearifolia G. Fred Hrusa 1995-4-2 12107 Colusa On Walker Ridge Road approx. 3 miles N of Highway 20 950 Comment
  CAS-BOT-BC298294  Ericameria nauseosa var. speciosa Peter H. Raven 1959-9-11 14416 Colusa 0.5 mile S of Snow Mt 1920 Comment
  UCD131766  Erigeron canadensis P. B. Kennedy 30-31 May 1922 s.n. Colusa near Cortina. Comment
  CHSC32217  Erigeron petrophilus var. petrophilus James Jokerst 1980-8-6 1056 Colusa North Coast Ranges. Near Snow Mountain (WEST). Comment
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Jul 16 2007
  CAS-BOT-BC216002  Eriodictyon californicum Roxana S. Ferris 1926-4-23 6431 A Colusa Near summit of grade on Williams - Stonyford Road Comment
  CAS-BOT-BC216003  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony Creek 2.5 miles east of Bonnie View, Inner North Coast Ranges 518 Comment
  RSA23083  Eriodictyon californicum Lincoln Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony creek 2.5 miles E of Bonnie View, Inner N Coast Ranges 518 Comment
  RSA401486B  Eriodictyon californicum Carolyn Sanford 1977-4-24 s.n. Colusa Dry hillsides along Walker Ridge Road above Barrel Springs Campground. 701 Comment
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Jul 31 2014
  UCD72480  Eriodictyon californicum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3814 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
  RSA60348  Eriodictyon californicum G. R. Campbell 1948-6-18 649 Colusa 2 miles south of Wilbur Springs. Comment
  CAS-BOT-BC242576  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa Bear Creek Canyon n. of Highway 20 (near Wilbur Springs) Comment
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  CHSC92835  Eriogonum dasyanthemum D. Isle 2000-6-7 1245 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  UCR212378  Eriogonum dasyanthemum Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4677 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek 513 Comment
  UCR44922  Eriogonum dasyanthemum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CAS-BOT-BC242577  Eriogonum dasyanthemum Ella D. Cantelow 1957-5-31 s.n. Colusa 4 mi. west of Leesville on grade above Bear Valley Comment
  CDA22488  Eriogonum dasyanthemum T. C. Fuller 1958-5-27 Colusa Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  CAS-BOT-BC250371  Eriogonum gracile Roxana Stinchfield 1916-6-18 307 Colusa Near College City 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
  RSA96804  Eriogonum luteolum Percy C. Everett, E. K. Balls 1954-10-17 20336 Colusa West slope Goat Mt., 0.9 mile SW from Linger Longer campsite; road from Stonyford to Upper Lake 1829 Comment
  CHSC32225  Eriogonum strictum var. greenei James Jokerst 1980-8-20 1099 Colusa North Coast Ranges. Near Solomon Peak. Comment
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Aug 20 2014
  CAS-BOT-BC267412  Eriogonum tripodum Beecher Crampton 1963-6-11 6850 Colusa Ca. 2 miles south of Lodoga 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
  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
  CHSC32219  Eriogonum umbellatum var. smallianum James Jokerst 1980-8-6 1054 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. 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
  SEINET7096744  Eriophyllum lanatum A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UCD57823  Eriophyllum lanatum Gordon Harrington 2007-4-17 34 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  CAS-BOT-BC308095  Eriophyllum lanatum var. achilleoides Pat Daly; Rudy Galindo 1988-4-16 54 Colusa 3.7 miles west on Goat Mountain Road off of Lodoga-Stonyford Road to Digger Pine Campground 451 Comment
  CAS-BOT-BC308097  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CDA15503  Eriophyllum lanatum var. achilleoides G. F. Hrusa, WTD 1998-6-19 14640 Colusa North Coast Ranges; Trough Springs ridge, immed. above (overlooking settlement) Fouts Springs. Comment
  RSA273361  Eriophyllum lanatum var. achilleoides J. P. Smith, Tom Nelson 1976-4-14 8578 Colusa Mendocino National Forest, confluence of Stony Creek and North Fork of Stony Creek 427 Comment
  CAS-BOT-BC308096  Eriophyllum lanatum var. achilleoides Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley along road to Bartlett Springs Comment
  JEPS34737  Eriophyllum lanatum var. achilleoides W. L. Jepson 1938-6-9 18962 Colusa mountains between Indian Valley, Lake County, and Bear Valley, Colusa County (Complexion Canyon, hillslope); Complexion Canyon 579 Comment
  UC1718073  Eriophyllum lanatum var. achilleoides John S. Mooring 1968-5-24 2066 Colusa Road from Leesville to Bartlett Springs, at lake-Colusa line Comment
  CHSC8130  Eriophyllum lanatum var. grandiflorum J. G. Moore 1969-4-12 64 Colusa North side of Hwy. 20 on hillside 15 mi. w of Williams. 106 Comment
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. Comment
  UCD66935  Erodium brachycarpum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5085 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat. 628 Comment
  UCD57557  Erodium cicutarium Cindy Yip; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  UCD64280  Erodium cicutarium Craig D. Thomsen 2000-3-31 2083 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UC73462  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  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
  UCD82579  Eryngium aristulatum Craig Thomsen 2008-6-12 2769 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  UC1487274  Eryngium aristulatum var. aristulatum Yusuf Sheikh and Lincoln Constance 1973-5-12 542 Colusa s. Leesville (on Bear Valley Rd. toward Clear Lake, 1 mi. s. of Brim Rd., 13.3 mi. n. of State Hwy. 20) Comment
  UC727670  Eryngium castrense Milo S. Baker 1946-9-4 11611 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  UCD38844  Eryngium castrense Beecher Crampton 1958-6-26 4976 Colusa along Grieve road, just northeast Hershey R.R. siding, 5.5 miles south of College City. Comment
  CAS-BOT-BC40751  Erysimum capitatum Roxana S. Ferris 1917-4-14 576 Colusa Arbuckle-Rumsey Road. Foothills 7 miles west of Arbuckle. Comment
  CDA12013  Erysimum capitatum G. F. Hrusa 1990-4-8 7665 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  SEINET233343  Erysimum capitatum Kathleen R. Robson 1981-5-2 33 Colusa Mendocino National Forest ; Colusa co.: From Stonyford take Fouts Springs Road 12mi W past Fouts Springs to Letts Lake 1219 Comment
  CHSC112229  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC1751  Erythranthe bicolor L. Oliver 1935-5-3 Colusa Comment
  CHSC27633  Erythranthe nudata Tim Spira; Rober Schlising 1978-5-13 3236 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC86121  Eschscholzia caespitosa Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 121 Comment
  UCR198142  Eschscholzia caespitosa Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3671 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  CAS-BOT-BC5882  Eschscholzia caespitosa Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  UC630427  Eschscholzia californica Annetta Carter 1938-5-8 1392 Colusa 5.5 mi s Leesville (on Wilbur Springs rd); Inner North Coast Range, Bear Valley 426 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-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
  CHSC42185  Eschscholzia lobbii S. A. Zaitz 1986-4-5 11 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Ck, ca. 18 mi sw of Williams. 321 Comment
  HSC48045  Eschscholzia lobbii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3937 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UC71635  Eschscholzia lobbii Miss Alice King 1905-1 Colusa College City Comment
  SDSU6059  Eucrypta chrysanthemifolia D. F Howe 1962-5-19 3284 Colusa 13 miles west of Williams on #2. 213 Comment
  CHSC115331  Euphorbia crenulata Lowell Ahart 2015-4-10 20011 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. 500 Comment
  UCD66704  Euphorbia crenulata Craig D. Thomsen 2001-4-12 2454 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
  UCD55467  Euphorbia serpillifolia Ellen Dean; Gordon Harrington 2006-10-6 3292 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  CHSC59969  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa In field on east side of Bear Valley Road, 10.6 miles (by road) north of junction with State Highway 20. Valley floor of Bear Valley. 381 Comment
  CHSC79501  Euphorbia spathulata B. Castro; L. P. Janeway 2000-5-2 1110 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  UCD64248  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2050 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD65626  Euphorbia spathulata Craig D. Thomsen 2000-4-12 2128 -a 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
  UCD142493  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa On east side of Bear Valley Road, Bear Valley. 10.6 miles (by road) north of junction with State Highway 20. 365 Comment
  UCD61475  Extriplex joaquinana Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3896 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile SW of parking lot. 399 Comment
  UCD63021  Extriplex joaquinana Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4673 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCD63038  Extriplex joaquinana Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4884 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along unnamed tributary of Bear Creek. 376 Comment
  UCD82584  Extriplex joaquinana Craig Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-6-12 2764 Colusa Walker Ridge, near Elgin Mine on Lucientes property. 655 Comment
  UCD82632  Festuca arundinacea Jack Alderson 2009-8-6 28 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Northeastern corner of ranch, just S of Hwy 20. 313 Comment
  JEPS75748  Festuca californica L. R. Heckard and R. Bacigalupi 1976-9-6 4423 Colusa above Summit Springs (along trail to Fouts Camp, Colusa-Lake County line); Snow Mt. 1645 Comment
  JEPS80395  Festuca rubra L. R. Heckard and J. Hickman 1981-6-22 5628 Colusa s of Dark Hollow Trail; Snow Mt. 1981 Comment
  CAS-BOT-BC77676  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  CAS-BOT-BC77677  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCR227906  Forestiera pubescens Ellen Dean, J. Alderson, N. Voegtly, Craig D. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the Southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 253 Comment
  CAS-BOT-BC63016  Frangula californica subsp. crassifolia C. B. Wolf; B. D. Stark 1933-9-25 5506 Colusa Inner n. coast range, w. side of Bear Valley, near Mitchell Ranch House. Type Locality. 304 Comment
  JEPS118616  Frangula californica subsp. crassifolia B. Castro, L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge Road ca 0.5 mi N of its junction with USFS Rd 16N06, 0.5 mi NE of Pacific Point. Hough Springs 7.5' quad. Comment
  UCD112807  Frangula californica subsp. crassifolia Beecher Crampton 1958-5-19 4818 Colusa along Little Stony Creek, 4 - 5 miles west of Lodoga. Comment
  CAS-BOT-BC62916  Frangula californica subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa Oak Grove - Phillip's Ranch. Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  HSC48172  Frangula californica subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD163874  Frangula californica subsp. tomentella Craig D. Thomsen 2000-5-11 2395 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  UCD83758  Frangula californica subsp. tomentella Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5954 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  POM135670  Frankenia salina Roxana Stinchfield 1916-7-11 120 Colusa Colusa - Williams Road at 'Trough' Comment
  CAS-BOT-BC223367  Fraxinus dipetala Lester Rowntree 1936-4-11 s.n. Colusa Edge of Bear Creek Comment
  CHSC36175  Fraxinus dipetala Robert A. Schlising 1978-4-10 3218 Colusa Grapevine Pass, on Sites--Lodoga Road. 562 Comment
  CHSC76343  Fraxinus dipetala L. P. Janeway; B. Castro 1999-7-5 6500 Colusa Along Goat Mountain Road on south side of Little Stony Creek about 0.2 mi west of Trout Creek. Steep north facing shrubby slope. 530 Comment
  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
  UC1613366  Fritillaria Charles M. Belshaw April 1937 2863 Colusa vicinity of Cook's Spring (Devil's Ridge); Devil's Ridge Comment
  RSA589939  Fritillaria Michael A. Vincent, Robert Rhode 1996-3-30 7305 Colusa Along Brim Road, 2.9 mi W jct Bear Valley Rd. Comment
  CHSC62852  Fritillaria affinis Vernon H. Oswald; Lowell Ahart 1994-3-23 6013 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
  UCD162981  Fritillaria affinis Craig D. Thomsen 2002-2-7 2568 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.5 miles west of Hwy 20/16 intersection. 345 Comment
  CHSC52363  Fritillaria pluriflora Henricus C. Jansen 1980-3-1 Colusa Along both sides of Lodoga-Leesville, 0.8 mi S of intersection with Stony(?) Sites Rd. 371 Comment
  JEPS100637  Fritillaria pluriflora Dean W. Taylor 1992-4-16 12400 Colusa East Park Reservoir, ca. 0.4 mi due W from spillway into Little Stony Creek Inner North Coast Range 411 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
  UC1479606  Fritillaria pluriflora R. Y. B. 1965-3-14 8387 Colusa ca. 9 - 10 mi. s. Leesville (Bear Valley Rd.) 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
  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
  JEPS52784  Galium andrewsii subsp. andrewsii Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4356 Colusa Bartlett Springs road 2.5 mi w Leesville (1.8 mi w of junction with Bear Valley Rd, w-facing slope) 530 Comment
  UCD81217  Galium andrewsii subsp. andrewsii Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5554 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridge so the south of Destanella Flat. 522 Comment
  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
  OBI78460  Galium bolanderi Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1335 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  POM11693  Galium californicum Daniel Cleveland 1882-6-20 s.n. Colusa Allen Springs. Comment
  CDA15479  Galium californicum subsp. flaccidum G. F. Hrusa, WTD 1998-6-19 14616 Colusa North Coast Ranges; Goat Mtn. Rd. approx. 1 km. below intersection with USFS Pacific Ridge Rd. (M5). Comment
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  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
  JEPS110109  Galium parisiense Lowell Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA725011  Galium parisiense L. Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  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
  UCD56687  Galium porrigens Gordon Harrington 2007-3-25 6 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 572 Comment
  UCD57343  Galium porrigens Sergio Testa 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  UCD66572  Galium porrigens var. tenue Craig D. Thomsen 2001-5-24 2457 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS17975  Galium porrigens var. tenue George B. Rossbach 1955-4-9 508 Colusa Route 20; w edge of county 563 Comment
  CDA12797  Garrya congdonii G. F. Hrusa 1996-2-26 12632 Colusa Serpentine Flora of California; above Little Stony Creek, on Goat Mtn.Rd. approx. 2.5 miles SE of Stonyford-Lodoga Rd. Comment
  JEPS11967  Garrya congdonii Rimo Bacigalupi with G. T. Robbins 1954-6-25 4623 Colusa on road from Indian Valley (Lake County) to Bear Valley (Colusa County) (0.5 mi e of summit (Lake - Colusa County line)) 548 Comment
  SBBG34146  Garrya congdonii R. D. Slayback 1959-3-20 2 Colusa near St Hwy 16, 6 mi NW of Rumsey Comment
  SBBG5331  Garrya congdonii H. and M. Dearing 1939-5-12 3331 B Colusa near Leesville 457 Comment
  POM163456  Garrya flavescens subsp. congdonii Roxana S. Ferris 1926-4-23 6456 a Colusa Between Leesville and Stonyford four miles from Stonyford. Comment
  CHSC107496  Garrya veatchii Ralph Minto 2010-1-29 1919 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Fouts Springs road. 609 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
  CHSC79788  Gilia capitata G. F. Hrusa 1998-6-19 14611 Colusa Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10S, 05356N, 43478E. 485 Comment
  UCD63100  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4931 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  UCD64432  Gilia capitata Craig D. Thomsen 2000-5-11 2323 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  CHSC94881  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
  HSC66136  Gilia tricolor S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Colusa Bartlett Springs Rd. Comment
  RSA293157  Gilia tricolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9563 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  RSA590190  Gilia tricolor Michael A. Vincent, Robert M. Rhode 1996-3-30 7283 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct. Wilbur Springs Rd. Comment
  UCD64267  Gilia tricolor Craig D. Thomsen 2000-3-31 2065 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  SEINET5732133 Image available Gilia tricolor Mary Jane York 1969-1 12 Colusa In an open valley, soil dry, Bear Valley, 9.5 miles north of State Highway 20.; Bear Valley Comment
  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
  CHSC59999  Gilia tricolor subsp. tricolor Carole Pauls 1975-4-20 1 Colusa Pasture. Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  UC71621  Githopsis specularioides Miss Alice King 1905-1 Colusa College City Comment
  UCD72440  Githopsis specularioides Kim E. Steiner 1978-4-29 196 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  JEPS104408  Glinus lotoides Lowell Ahart 2003-10-23 10668 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS120805  Glinus lotoides Lowell Ahart 2013-10-1 19074 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  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
  CHSC115630  Glinus lotoides David Isle; Rhonda Isle 2014-9-27 2140 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). Comment
  UCD67068  Glyceria Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5096 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  UCD58167  Glycyrrhiza lepidota Gordon Harrington 2007-5-15 57 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
  UCD72477  Glycyrrhiza lepidota Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3811 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  SEINET7042569  Gnaphalium canescens A. G. Vestal 1938-9-1 s.n. Colusa Along top of trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  CAS-BOT-BC303890  Gnaphalium palustre Roxana Stinchfield 1916-7-9 409 Colusa Phillips Ranch 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
  UCD162346  Grindelia camporum Chuck Hughes 2015-1-13 414 Colusa North side of Highway 20, just east of the I-5 interchange. 20 Comment
  CHSC50794  Grindelia camporum var. camporum Vernon Oswald 1990-7-30 4410 Colusa Maxwell-Colusa Rd just east of Two Mile Rd, ca. 2 mi east of Maxwell. Between road and irrigation ditch. 27 Comment
  JEPS113894  Grindelia hirsutula L. P. Janeway 2007-6-17 9058 Colusa Inner North Coast Ranges; Along Bartlett Springs Road between Bear Valley and Walker Ridge Road. 530 Comment
  UC71783  Grindelia hirsutula H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC727696  Grindelia hirsutula Milo S. Baker 1946-9-3 11582 Colusa towards Williams on Hwy 3 mi w Colusa Comment
  UC765013  Guillenia flavescens R. F. Hoover 1938-4-24 3222 Colusa Venado Comment
  UCD66996  Gutierrezia californica Gordon Harrington 2008-8-14 79 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
  JEPS80117  Hackelia amethystina L. R. Heckard with J. Hickman 1980-7-1 5275 Colusa n side of East Peak; Snow Mountain 2072 Comment
  CHSC112271  Hainardia cylindrica Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18638 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
  CHSC80500  Hainardia cylindrica Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  UCD85141  Hainardia cylindrica Beecher Crampton 1953-4-29 1143 A Colusa Colusa County, 2 miles east of Maxwell. Comment
  UCD85147  Hainardia cylindrica Beecher Crampton 1958-5-19 4795 Colusa 10.1 miles southeast of Leesville, foothill area. Comment
  CAS-BOT-BC302201  Harmonia hallii G. L. Stebbins 1971-6-6 8013 Colusa South end of Walker Ridge, near Clyde Mine 914 Comment
  JEPS94706  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Vallyy and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  UCD135766  Harmonia hallii Bruce G. Baldwin 1986-4-13 599 Colusa 2.6 miles west of junction with Bear Valley Road along Bartlett Springs Road. Comment
  UCD82590  Harmonia hallii Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2735 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  UCD83819  Harmonia hallii Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5966 Colusa Walker Ridge on border of Lake and Colusa Counties. Along Walker Ridge Rd., just E of Barrel Springs area. 721 Comment
  CDA34807  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Road, ~8.3 km N of jct. with Hwy. 20, ~1 km N of jct with Indian Valley Reservoir Rd., at road cut, both sides and adjacent slopes. Comment
  JEPS80276  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa n slope West Peak; Snow Mt., West Peak 2042 Comment
  JEPS83144  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  UCD72454  Hedypnois cretica Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3791 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
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Jun 12 2013
  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
  CHSC112644  Helianthus bolanderi Lowell Ahart 2013-10-1 19071 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
  CHSC94313  Helianthus bolanderi Lowell Ahart 2006-8-9 13097 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  RSA718200  Helianthus bolanderi L. Ahart 2006-8-9 13097 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UC194952  Helianthus bolanderi H. M. Hall 1916-8-16 10267 Colusa near Williams Comment
  UC71768  Helianthus bolanderi H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC727672  Helianthus bolanderi Milo S. Baker 1946-9-4 11616 Colusa near Locked Gate; Colusa Gun Club, Butte Sink Comment
  UCD64041  Helianthus bolanderi Craig D. Thomsen 2000-6-23 2426 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCR196276  Helianthus bolanderi Ellen Dean, Gordon Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3903 Colusa Payne Ranch (owned by BLM), lands to the southwest of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek, c. 1.0 mi southwest of parking lot 390 Comment
  RSA126696  Helianthus bolanderi Peter H. Raven, Richard Snow 1959-9-11 14424 Colusa About 2 miles south-east of Happy Camp 762 Comment
  JEPS120804  Heliotropium curassavicum Lowell Ahart 2013-10-1 19096 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  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
  UCD72399  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5124 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Confluence of Cache and Bear Creeks at southern tip of ranch. 198 Comment
  SD22371  Heliotropium curassavicum var. oculatum Richard Neil 1938-6-20 Colusa Grimes Comment
  CHSC94523  Heliotropium europaeum Lowell Ahart 2006-8-22 13228 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104401  Helminthotheca echioides Lowell Ahart 2003-10-23 10661 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS68350  Hemizonia congesta subsp. clevelandii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2790 Colusa on Ladoga road about 3 mi s Stonyford 335 Comment
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  UCD146726  Hemizonia congesta subsp. clevelandii G. F. Hrusa 1998-6-19 14596 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1/2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCR225657  Hemizonia parryi Craig D. Thomsen, Gordon Harrington 2008-7-6 2784 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond c. 0.2 miles to the south of the Roadkill cafe. 396 Comment
  SEINET10758258  Hemizonia parryi subsp. parryi Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 909 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W, near edge between sections 4 and 5. 499 Comment
  HSC103568  Hemizonia pungens Thomas W. Nelson, Jane Nelson 1983-8-13 7596 Colusa At rest stop just south of Maxwell Comment
  JEPS75707  Heracleum lanatum Alice Q. Howard 1972-7-10 10 Colusa stream crossing trail between Fouts Camp and Box Springs (lower of 2 wet places along trail on n. side of ridge separating Trout & Paradise Creeks, Snow Mt.); Snow Mt. 1600 Comment
  CHSC112922  Hesperevax acaulis var. robustior B. Castro; L. Janeway, Robin Carter 2010-3-23 1801 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal, in disturbed, grazed annual grassland. 121 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
  CHSC79845  Hesperocnide tenella B. Castro; L. P. Janeway 2000-5-4 1129 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  SD40656  Hesperocyparis sargentii Carl B. Wolf, E. R. Johnson 1934-10-15 Colusa Cook Springs (western part of county) 550 Comment
  UCD82619  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2887 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CAS-BOT-BC175982  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  JEPS94735  Hesperolinon californicum Vernon H. Oswald and Lowell Ahart 1998-7-15 9269 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UC1212442  Hesperolinon californicum Herbert L. Mason 1946-5-31 12815 Colusa 1 mi e Lake County line (Bartlett Springs to Williams road, western Colusa County); Inner North Coast Ranges Comment
  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
  UC1212460  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4248 Colusa on State Hwy 20 ca 100 ft s origin of Wilbur Springs road; Inner North Coast Ranges, Bear Creek 320 Comment
  UC1212465  Hesperolinon californicum Helen K. Sharsmith 1959-5-27 4695 Colusa foot grade on Lower Lake to Williams road (w side of valley); Inner North Coast Ranges, Bear Valley 426 Comment
  UCD63908  Hesperolinon californicum Craig D. Thomsen 2000-6-23 2382 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCR261748  Hesperolinon californicum Ann Howald 2003-5-29 2347 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.6 miles north of Lodoga, 0.1 mi south of Chisolm Cove Group Campground 385 Comment
  CAS-BOT-BC175983  Hesperolinon californicum T. S. Brandegee 1884-6-1 s.n. Colusa Unspecified Comment
  JEPS110118  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS120982  Hesperolinon disjunctum Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18635 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  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
  UC1212488  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4696 Colusa foot grade on Lower Lake to Williams road (w side of valley); Inner North Coast Ranges, Bear Valley 426 Comment
  UC1212491  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4255 Colusa road between Fouts Springs and Stoneyford; Inner North Coast Ranges, Mendocino National Forest, Candy B 609 Comment
  CAS-BOT-BC176220  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa One mile beyond Wolf Glade on spur road, drainage of Stoney Creek, Mendocino National Forest 609 Comment
  UCD110516  Hesperolinon disjunctum Marilyn Ivey 1973-5-19 55 Colusa 1.5 miles up Wilbur Springs Road north off of State Highway 20. Comment
  CHSC111651  Hesperolinon drymarioides David Isle; Niall McCarten, Roxanne Bittman 1987-5-26 2062 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. On N slope openings in serpentine chaparral N of Cook Springs (at end of rd). 463 Comment
  JEPS122820  Hesperolinon drymarioides W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 289 Colusa 200 feet up slope from end of Cook Springs Road west off of Leesville Lodoga Road south of Lodoga. Comment
  UC1212301  Hesperolinon drymarioides Helen K. Sharsmith 1953-7-1 4407 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UC1509752  Hesperolinon drymarioides C. M. Rogers 1969-6-21 13265 Colusa near Cooks Springs Comment
  UCD110523  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs. 548 Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD83448  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2888 Colusa Colusa County on Walker Ridge: Eaton Springs, about 1 mile east of Walker Ridge Road. 710 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
  RSA0072452  Heteromeles arbutifolia Michael A. Vincent, Robert M. Rhode 1996-3-30 7296 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  JEPS73775  Heuchera micrantha var. pacifica L. R. Heckard 1972-7-10 3126 Colusa 3 mi nw Fouts Springs (on se corner of Snow Mt.); Snow Mt 1828 Comment
  UC931960  Hibiscus lasiocarpos Verne Grant and Alva Grant 1946-8-6 7837 Colusa 1 mi. n. of Butte Outing Gun Club near Colusa (Butte Creek); Butte Creek 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
  CHSC25319  Hibiscus lasiocarpos var. occidentalis Hayes; Warner, Schlising 1977-8-23 49 Colusa Along Putnam Rd., where this road reaches the Butte Creek Drainage, off of Gridley road 5. 50 Comment
  JEPS110110  Hirschfeldia incana Lowell Ahart 2006-8-9 13155 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA725024  Hirschfeldia incana L. Ahart 2006-8-9 13155 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CDA20339  Holocarpha virgata D. Brown 2001-10-17 PDR 024366 Colusa Northern California; Vicinity of Colusa 0 Comment
  UC194239  Holocarpha virgata subsp. virgata H. M. Hall 1916-8-16 10270 Colusa near Arbuckle Comment
  RSA28813  Holodiscus discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade 3 miles W of Leesville. Comment
  CAS-BOT-BC152577  Holodiscus discolor var. discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade about 3 miels west of Leesville Comment
  UCD61443  Hordeum brachyantherum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3888 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1000 ft NW of parking lot. 339 Comment
  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
  JEPS121772  Hordeum brachyantherum David Isle 1989-5-14 1995 Colusa COLUSA County, CA. Pendell Ranch ~ 2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road. 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
  SD225718  Hordeum depressum Carol Witham, Jennifer Buck 2001-4-30 161 Colusa 2 mi. south of the town of Colusa along Hwy 20, east east of Hwy 20 and the Colusa Airpo9rt, Dolan Ranch site, pool # DOL001 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-BC285061  Hordeum marinum subsp. gussoneanum Roxana S. Ferris 1926-4-22 6290 Colusa 3 miles west of Colusa Comment
  CHSC107165  Hordeum marinum subsp. gussoneanum L. P. Janeway; B. Castro 2011-4-27 10243 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. North edge of large wetland. 49 Comment
  CHSC83705  Hordeum marinum subsp. gussoneanum L. P. Janeway 2002-4-24 7520 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD163872  Hordeum marinum subsp. gussoneanum Craig D. Thomsen 2000-3-31 2173 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  UCD85779  Hordeum marinum subsp. gussoneanum A. A. Beetle 1942-5-21 3273 Colusa 12 miles north of Williams. Comment
  RSA669471  Hordeum murinum subsp. glaucum R. R. Halse 2001-3-22 5946 Colusa Williams, along vacant lot by 455-4th street. 18 Comment
  UCD57281  Hordeum murinum subsp. glaucum Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3649 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
  CHSC83698  Hordeum murinum subsp. leporinum L. P. Janeway 2002-4-24 7521 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD86536  Hordeum vulgare Beecher Crampton 1962-4-17 6216 Colusa Sycamore. Comment
  JEPS80245  Horkelia californica subsp. dissita L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa w Summit Springs (Snow Mt.); , w of Summit Springs 1554 Comment
  JEPS80817  Horkelia californica subsp. dissita L. R. Heckard and J. C. Hickman 1981-7-31 5789 a Colusa e side Snow Mt. (Dry meadow at Box Spring); Box Spring 1402 Comment
  JEPS95511  Hornungia procumbens Vernon H. Oswald and L. Ahart 1994-4-6 6075 Colusa T16N R7W SW1/4 Sec. 11, 1800 ft, Chaparral. Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford 548 Comment
  UCD66960  Hosackia crassifolia Ellen Dean; Davis Botanical Society 2008-5-31 5004 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1152 Comment
  UCD106062  Hosackia crassifolia Freed W. Hoffman 1948-6-27 2515 Colusa Upper Letts Valley, 8.6 miles south of Fouts Springs, western part of county. Comment
  UCD146730  Hosackia crassifolia var. crassifolia G. F. Hrusa 1998-6-19 14617 Colusa North Coast Ranges. Along USFS Pacific Ridge Road. (M5) Above intersection with Goat Mountain Road. 1120 Comment
  UCD67029  Hydrophyllum occidentale Ellen Dean; Davis Botanical Society 2008-5-31 5012 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  HSC48199  Hypochaeris glabra Thomas W. Nelson, Jane P. Nelson 1978-4-29 3957 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  SEINET255491  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  UCD57109  Hypochaeris glabra Gordon Harrington; Diana Hickson 2007-4-7 0022 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/5 to 1/2 mile W of Roadkill Cafe on old fuel break. 442 Comment
  JEPS81320  Iris fernaldii L. R. Heckard and J. C. Hickman 1982-7-6 5936 Colusa wilderness area above Summit Springs (s side of Snow Mt, near entrance and parking to Snow Mt); Snow Mt. 1584 Comment
  RSA256676  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Road, ca. 0.7 mile from junction with Little Indian Valley Road 854 Comment
  JEPS80386  Juncus L. R. Heckard, and J. Hickman 1981-6-22 5619 Colusa Dark Hollow Creek Snow Mt. 1889 Comment
  CHSC62909  Juncus balticus Vernon H. Oswald 1994-4-11 6104 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, at the SW corner of Tract 39. 25 Comment
  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
  CHSC107974  Juncus bufonius var. bufonius B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1859 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  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
  JEPS75729  Juncus ensifolius L. R. Heckard 1974-9-9 3865 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  UCD163648  Juncus xiphioides Craig Thomsen 1998-6-19 1944 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  CDA20252  Juncus xiphioides G. D. Barbe, Nola Parmer 1982-6-4 3638 Colusa Sacramento Valley; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  CHSC116398  Juncus xiphioides David Isle 2014-6-7 2133 Colusa North Coast Range: About 1 mile south of Stonyford, California. On west bank of Salt Creek, just north of 2nd curve north of bridge on Dennis Drive. On David and Rhonda Isle property. (Waypoint is on Dennis Drive Bridge over Salt Creek.) 10 -0538832E, 4357208N. Comment
  UCR280794  Juncus xiphioides var. xiphioides David Isle 2014-6-7 2133 Colusa North Coast Range, c. 1 mile south of Stonyford, David and Rhonda Isle property. West bank of Salt Creek, just north of second curve north of bridge on Dennis Drive 366 Comment
  UCD70298  Juniperus californica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Open California juniper woodland (Juniperus californica). 420 Comment
  HSC97013  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa S side of Stony Creek, at Mine Camp, about 3.5 mi. W of Stonyford. 422 Comment
  RSA718197  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 422 Comment
  CAS-BOT-BC123283  Krynitzkia rostellata M. K. Curran 1884-5-1 s.n. Colusa Leesville (wrote Leesburg, Lake(?) Co. on label; later corrected to Leesville Comment
  CHSC80155  Lactuca saligna B. Castro; G. Kuenster 2000-7-19 1211 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low flat terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 39 Comment
  RSA0011766  Lagophylla dichotoma Ethel Crum 1938-5-8 2033 Colusa Inner North Coast Range, 3 miles N of Leesville. Comment
  JEPS110184  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UCD163223  Lagophylla minor Craig D. Thomsen 2000-4-12 2155 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  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
  JEPS81971  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
  UCD82369  Lagophylla minor Robin McMaster 1973-4-15 341 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. 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
  UCD159332  Lagophylla ramosissima D. S. Park 2010-6-5 116 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  UCR206691  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-1-31 14323 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  CAS-BOT-BC337883  Lasthenia Peter Rubtzoff 1978-5-14 9167 Colusa Bear Valley Road ca. 4-5 miles south of junction of the road to Fort Ross State Historic Park. Bartlett Springs Road Comment
  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
  CAS-BOT-BC324484  Lasthenia ferrisiae Alice Eastwood 1921-4-11 10232 Colusa Colusa Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites Comment
  UCD18839  Lasthenia fremontii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 146 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC27622  Lasthenia glabrata Timothy Spira; Robert Schlising 1978-5-13 3250 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (=Wilber Springs) Road. Comment
  CHSC53934  Lasthenia glabrata subsp. glabrata Vernon H. Oswald 1991-4-21 4520 Colusa Bear Valley Rd in Bear Valley, 1.0 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. Roadside. 417 Comment
  UC1049545  Lasthenia glabrata subsp. glabrata Rimo Bacigalupi 1950-4-16 3124 Colusa Bear Valley Comment
  UCD82464  Lasthenia gracilis Craig Thomsen; G. Harrington 2009-5-12 2841 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD67937  Lasthenia gracilis Nancy Vucinich 1978-4-8 8 Colusa Bear Valley, 10.3 miles N. of junction of Highways 16 and 20. Growing in open meadow, foothill woodland. Growing in clusters. Stems and leaves softly pubescent. Slender annual, yellow flowers. 396 Comment
  UCD80896  Lathyrus vestitus Ellen Dean; G. Harrington 2009-3-27 5296 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Along road that connects Lynch Canyon and the Ridge Trail on slope above road. 453 Comment
  HSC95475  Lathyrus vestitus subsp. vestitus A. Skelly, B. Bletcher, G. McCabe 1996-3-30 10 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  CHSC62933  Lathyrus vestitus var. vestitus Vernon H. Oswald; Lowell Ahart 1994-4-6 6070 Colusa Goat Mtn. Rd. 0.3 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. 487 Comment
  HSC103356  Lathyrus vestitus var. vestitus Thomas W. Nelson, Jane Nelson 1981-4-16 6419 Colusa Along Bartlet Springs-Bear Valley Rd., ~ 100 yds. from Bear Valley 610 Comment
  CAS-BOT-BC323901  Layia chrysanthemoides Mrs. H. C. Cantelow 1936-4-11 1155 Colusa Bear Creek Canyon. 396 Comment
  CAS-BOT-BC323905  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  CHSC55474  Layia chrysanthemoides Barbara Adams 1991-4-6 13 Colusa Ca 0.3 mi west of junction of Hwys 20 and 16, south side of Bear Creek, ca 18 mi southwest of Williams. 321 Comment
  CHSC81247  Layia chrysanthemoides J. Trizzino 2001-3-31 14 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  SEINET7062982  Layia chrysanthemoides A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 mile south of Route 20 and near Bear Creek. UTM Zone 10, 555654mE, 4318071mN. (WGS84/NAD83). 320 Comment
  UCD163702  Layia chrysanthemoides Craig Thomsen 1999-5-10 2014 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  UCR212376  Layia chrysanthemoides Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4663 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  CAS-BOT-BC323904  Layia chrysanthemoides Roxana S. Ferris 1917-4-12 506 Colusa 4 miles E of Willaims. Alkali Plains. Comment
  CHSC53937  Layia platyglossa Vernon H. Oswald 1991-4-21 4522 Colusa Bear Valley Rd in Bear Valley, 3.3 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. Roadside. 417 Comment
Read comments
May 24 2013
  HSC96795  Layia platyglossa J. Carey, A. Hong, J. Leffingwell 1995-4-1 31 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  UCD163693  Layia platyglossa Craig Thomsen 1999-4-27 1995 Colusa Bear Valley. About 6 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD57327  Layia platyglossa Amy Whitcomb 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 556 Comment
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC380897  Layia platyglossa Ethel Crum 1936-5-8 2036 Colusa Bear Valley 4 miles south of Leesville 426 Comment
  HSC85783  Layia platyglossa Bobbi Schnell, Leonel Arguello, Andrea Begnoche 1987-4-12 35 Colusa Off to the side of the Road in Bear Valley Comment
  UCD135674  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  CAS-BOT-BC329322  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa Summit of ridge, Comanche Hills, 4 miles NE of Rumsey 254 Comment
  CAS-BOT-BC329323  Layia septentrionalis James Jokerst 1985-4-10 2227 Colusa Near Walker Ridge. 547 Comment
  JEPS13436  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UC638682  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa 4 mi ne of Rumsey; Comanche Hills 254 Comment
  UC75946  Layia septentrionalis Miss M. Alice King 1905-1-1 Colusa near College City Comment
  UC761855  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey-Arbuckle road Comment
  UC761877  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UCR261646  Layia septentrionalis Ann Howald 2003-4-23 2313 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
  JEPS127105  Lemna minuta Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20723 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  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
  SEINET8201321 Image available Lemna trisulca J. M. Tucker, L. K. Mann, John Tothill 1959-1 3532 Colusa Mill Valley Comment
  UC1101262  Lemna trisulca C. Richie Bell 1951-6-13 1167 Colusa just below Letts Meadow (on road from Bear Creek to Foutes Spring) 914 Comment
  UCR225659  Leontodon taraxacoides Craig D. Thomsen, Gordon Harrington 2008-7-6 2777 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
  CAS-BOT-BC88675  Lepidium acutidens A. A. Heller 1921-4-10 13542 Colusa Near Colusa. Comment
  UCD63721  Lepidium draba Craig D. Thomsen 2008-5-31 2761 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. 320 Comment
  UCR233291  Lepidium lasiocarpum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17134 Colusa Eastern foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 2.0 miles southeast of Sites 85 Comment
  CHSC106232  Lepidium latifolium B. Castro; L. P. Janeway 2001-6-3 1255 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. Small strip of this species along old roadbed at head of the springs. 883 Comment
  UC398784  Lepidium latipes Brandegee Apr 1889 Colusa Colusa Junction Comment
  CHSC86962  Lepidium strictum B. Castro 2003-4-10 1424 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In bed of dirt road near confluence of small creeks, on west edge of Sacramento Valley. 85 Comment
  UC72926  Lepidium strictum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley 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
  HSC94027  Leptosiphon androsaceus A. Skelly, G. McCabe, B. Bletcher 1996-3-30 3 Colusa .9 mi. N of Walker Springs Rd. and Indian reservoir Rd. jct. on Walker Ridge Rd., 57 mi. E of Hwy. 101 on Hwy. 20 777 Comment
  CHSC27551  Leptosiphon bicolor Scott E. Patton 1978-4-9 6 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 m wsw of Williams. 143 Comment
  CHSC79790  Leptosiphon bicolor L. P. Janeway; B. Castro 2000-5-1 6688 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  UCD162985  Leptosiphon bicolor Craig D. Thomsen 2002-4-4 2584 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163670  Leptosiphon bicolor Craig Thomsen 1999-4-15 1970 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD57330  Leptosiphon bicolor Amy Whitcomb 2007-3-25 2 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
  RSA388851  Leptosiphon bicolor Eugene Tanimoto 1975-4-20 s.n. Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC79791  Leptosiphon bolanderi L. P. Janeway; B. Castro 2000-5-4 6706 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  CHSC61230  Leptosiphon ciliatus Siegel 1977-4-16 8 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. 143 Comment
  UCD163880  Leptosiphon ciliatus Craig D. Thomsen 2002-3-27 2575 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
  RSA589923  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7288 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  UCD118848  Leptosiphon latisectus Robert E. Preston 1995-3-26 724 Colusa mi west of Stonyford, 0.25 mile north of North Fork campground. Comment
  CHSC1269  Leptosiphon parviflorus V. Holt 1935-5-12 Colusa Stonyford. Comment
  UCD163234  Leptosiphon parviflorus Craig D. Thomsen 2001-4-12 2440 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
  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
  UCD82545  Leptosiphon parviflorus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5700 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  UCD118988  Leptosiphon parviflorus Robert E. Preston 1995-6-2 869 Colusa Walker Ridge. 1005 Comment
  UCD15428  Leptosiphon parviflorus Margit Sands 1985-4-13 32 Colusa in Bear Valley, 7.4 miles north of Wilbur Hot Springs rd., a quarter of a mile form the west side of the road; 396 Comment
Read comments
Apr 18 2009
  CHSC32205  Lesquerella occidentalis subsp. occidentalis James Jokerst 1980-8-7 1067 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  CAS-BOT-BC341799  Lessingia nemaclada T. S. Brandegee 1884-1-1 s.n. Colusa Mountain House Comment
  UCD66535  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS94654  Lessingia ramulosa Vernon H. Oswald and Lowell Ahart 1998-7-15 9276 Colusa on Sawtelle Valley Rd. 0.4 mi n Bartlett Springs Rd. (w side of county) 670 Comment
  UCD55454  Lessingia ramulosa Ellen Dean; Gordon Harrington 2006-10-6 3278 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
  UCD58177  Lessingia ramulosa Gordon Harrington 2007-5-31 68 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  SEINET11810787  Lessingia ramulosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  UCD134101  Lessingia ramulosa Vernon H. Oswald; Lowell Ahart 1998-7-15 9276 Colusa west side of county on Sawtelle Valley Road 0.4 mile north of Bartlett Springs Road. 670 Comment
  UCD56681  Lewisia rediviva Roger Willmarth 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 563 Comment
  JEPS15551  Lewisia triphylla G. Thomas Robbins with L. R. Heckard 1956-7-25 3708 Colusa meadow along trail due s, skirting e base of ridge forming Snow Mt. West Snow Mt. East; Snow Mt. West 1981 Comment
  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
  UCD65629  Leymus triticoides A. A. Beetle 1946-6-27 4684 Colusa Wilber Springs. Comment
  CDA32489  Leymus triticoides W. C. Disney Jr. 1959-5-8 2344 Colusa Princeton area 0 Comment
  CHSC49659  Lilium pardalinum subsp. pardalinum Vernon Oswald 1986-6-30 2173 Colusa Fouts Springs Rd. (M10) 14.5 mi w of Rd. 306, 0.5 mi ne of jct. Letts Lake Rd, 17N02. 1219 Comment
  CHSC53964  Limnanthes douglasii subsp. nivea Vernon H. Oswald 1991-4-21 4517 Colusa Lodoga Stonyford Rd, ca. 2 mi south of Stonyford. Along drainages in pastures. 371 Comment
  UCD66941  Limosella acaulis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5090 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UC106857  Linanthus androsaceus Brandegee 1889-1 Colusa Comment
  UC963759  Linanthus bolanderi Herbert L. Mason 1941-4-5 12405 Colusa 3 mi s Stonyford Comment
  SEINET7096751  Linanthus ciliatus A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 miles south of Route 20 and near Bear Creek. NAD27, 39? deg. 00' 36ao, -122?_ 21' 22ao (converted to WGS84 decimal degrees) Comment
  UC1745721  Linanthus ciliatus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-7 1376 Colusa Open ridge crest 0.1-0.2 mi. W of summit of Rumsey-Arbuckle rd. 4.2 mi. from Rumsey. Comanche Hills (?). Comment
  HSC89737  Linanthus dichotomus subsp. meridianus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 11 Colusa Goat Mtn. Rd., 0.2 mi. Lodoga/Stonyford Rd. jct. 152 Comment
  UCR198147  Linanthus jepsonii Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3681 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  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
  JEPS76798  Listera convallarioides Alice Q. Howard 1972-7-10 4 Colusa n side of the ridge separating Trout Creek and Paradise Creek (the highest of two mossy spring areas crossing trail from Fouts Camp to Box Springs); Snow Mountain 1676 Comment
  HSC92471  Lithophragma heterophyllum Brad Kerstetter, Roxanne Jackson, Jeff Cox 1995-5-6 52 Colusa Blue Oak Campground 549 Comment
  HSC72155  Lithophragma parviflorum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9568 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  CHSC107938  Logfia filaginoides B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1887 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 1 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
  CHSC112234  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Ranges. On the north side of the 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
  HSC45699  Logfia filaginoides Christopher Knopp 1978-4-22 12 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 412 Comment
  RSA0118614  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Range. On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CAS-BOT-BC283547  Lolium multiflorum Roxana Stinchfield 1916-6-17 279 Colusa Road to Tule near College City Comment
  UC38800  Lolium temulentum J. Burtt Davy May, 1898 4293 Colusa near Princetown Comment
  RSA424750  Lomatium Aaron Liston, M. Blumler 1987-4-26 667 -7 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCR206393  Lomatium George K. Helmkamp, E. A. Helmkamp 2009-3-11 14374 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  CHSC42597  Lomatium californicum Vernon Oswald 1986-6-4 2080 Colusa M10, 0.2 mi w of its jct. with M5. 609 Comment
  RSA715880  Lomatium californicum David W. Isle 2003-6-4 370 Colusa Mendocino National Forest, Middle Fork Stony Creek Watershed, W of M-10/M-5 junction on N edge of M-10 622 Comment
  UCD80835  Lomatium californicum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5292 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. South side of canyon that is located to the north of Brophy Canyon. 274 Comment
  CDA33705  Lomatium ciliolatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC91009  Lomatium dasycarpum subsp. tomentosum D. Isle 2002-4-18 289 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Motorcycle info. Center and Fouts Spring Rd., above 18N01.2 jct. w/ OHV trail. 451 Comment
  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
  CHSC42602  Lomatium hooveri Vernon Oswald 1986-5-12 2005 Colusa Brim Rd. (Bartlett Springs Rd.) 1.5 mi w of Bear Valley Rd. 441 Comment
  CHSC70858  Lomatium hooveri Vernon Oswald; Lowell Ahart 1998-4-21 8943 Colusa Stonyford-Logoda Rd. 3.7 mi south of Stonyford. 384 Comment
  UCD56662  Lomatium hooveri Sam Bledsoe 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  UCD150867  Lomatium hooveri Clinton C. Shock 1980-5-3 73 Colusa Walker Ridge, 14.6 miles north of State Highway 20, at intersection with road to Bear Valley. 670 Comment
  CHSC112235  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 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
  UCD127696  Lomatium macrocarpum G. L. Stebbins Jr. 1962-5-6 6025 Colusa along Highway No. 20, Bear Creek, between Williams and Lower Lake, south of Wilbur Springs. 457 Comment
  UCD58110  Lomatium macrocarpum Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3370 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. South of Destanella. 548 Comment
  UCD82531  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
  UC1053450  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  JEPS17548  Lomatium utriculatum Alice King May, 1906 Colusa College City Comment
  UC1053478  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UCD57859  Lomatium utriculatum Gordon Harrington 2007-4-17 29 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  HSC47643  Lomatium utriculatum J. P. Smith, J. O. Sawyer 1978-4-29 9795 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UCD40909  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa 9 miles north of Hwy 20 on Bear Valley Road. About 100 yards into field on west roadside. Comment
  CHSC116047  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 miles northwest of Sites. 175 Comment
  RSA0010483  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 miles northwest of Sites. 175 Comment
  UCD57666  Lonicera interrupta Erica A. Smith; 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/Eastern part of ranch. Craig Canyon. Along unimproved road, 100 yards west of where road crosses Craig Creek. 313 Comment
  JEPS60203  Lotus crassifolius var. crassifolius L. R. Heckard 1969-5-29 2239 Colusa about 6.5 mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  JEPS86626  Lotus denticulatus L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6706 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1500 Comment
  UCR227340  Lotus denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  SEINET7042570  Lotus formosissimus A. G. Vestal 1938-9-1 s.n. Colusa Along top of trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  CAS-BOT-BC234977  Lotus grandiflorus Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6045 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 769 Comment
  JEPS60198  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa on road above and w Fouts Springs 762 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
  JEPS80180  Lotus humistratus L. R. Heckard with J. Hickman 1980-7-3 5332 Colusa just w Summit Springs (sw Snow Mt., ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1548 Comment
  UCR206894  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14363 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  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
  UC725836  Lotus purshianus var. purshianus A. A. Heller 1919-6-8 13243 Colusa Ladoga Comment
  UCD78332  Ludwigia hexapetala B. J. Grewell 2006-7-11 06- 17 -LU Colusa Delevan National Wildlife Refuge. Managed seasonal pond at SE corner of refuge, north of Maxwell Road, immediately west of Colusa Basin Drain. 17 Comment
  CHSC33400  Lupinus Rene T. Retuta 1978-4-4 8 Colusa Ca. 0.3 mi w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca 18 mi. sw of Williams. 579 Comment
  HSC89790  Lupinus albifrons L. Blackford, S. Branch, D. Malm 1988-4-16 71 Colusa 15.3 mi. off Hwy. 20 on Walker Ridge Rd. 915 Comment
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Aug 20 2014
  HSC91367  Lupinus albifrons A. Smith, A. Eller, B. Hoffman 1989-4-15 23 Colusa 3 mi. SW of Digger Pine Campground, on Goat Mtn. Rd. 152 Comment
  UCD105904  Lupinus albifrons Beecher Crampton 1975-4-21 9163 Colusa 1.5 miles southeast of Sites. Comment
  UCD41127  Lupinus albifrons K. Arhangelsky 2002-3-28 146 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  UCD56933  Lupinus albifrons Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3535 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CAS-BOT-BC198401  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams Comment
  POM163513  Lupinus albifrons var. albifrons Roxana S. Ferris 1926-4-23 6422 Colusa Near summit on grade. Williams- Stonyford Road. Comment
  UCR206371  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2009-3-11 14365 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  POM276309  Lupinus albifrons var. eminens Lyman Benson 1933-4-16 4324 Colusa Abbott Mine; Inner North Coast mountain range; north fork Cache Creek 762 Comment
  HSC45687  Lupinus bicolor Patricia Shesgreen 1978-4-22 32 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  SEINET3271563 Image available 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
  UCD64419  Lupinus bicolor Craig D. Thomsen 2000-4-12 2170 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
  HSC83318  Lupinus densiflorus var. aureus C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 34 Colusa Bear Valley, Bear Valley Rd. Comment
  POM20193  Lupinus densiflorus var. aureus Roxana S. Ferris 1917-4-14 584 Colusa 7 miles west of Arbuckle, along Sand Creek. Arbuckle-Ramsey Road. Comment
  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
  SEINET10838182  Lupinus densiflorus var. aureus J. P. Kroessig 1977-4-16 Kroessig 9 Colusa Corolla yellow-white, pleasantly scented. Large population ca. 0.3 Mi. Sw of Jct of hwys 20 and 16, s side of bear creek, ca 18 mi. Sw of williams. Wilbur Springs quad, 15'. S central border of sec 36, t14n, r5w. Open foothill Woodlands. 322 Comment
  CAS-BOT-BC8380  Lupinus formosus subsp. formosus Amos Arthur Heller 1940-4-21 15543 Colusa US Hwy 99W, 2 miles S of Williams Comment
  CAS-BOT-BC8485  Lupinus formosus var. robustus Amos Arthur Heller; H. E. Brown 1902-5-20 5573 Colusa Near College City Comment
  POM276455  Lupinus formosus var. robustus Lyman D. Benson 1933-4-16 4335 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  UC710400  Lupinus formosus var. robustus C. P. Smith 1946-4-26 46225 Colusa Hiway 99w about 2 mi w College City (Arbuckle - 1.5 mi s); Arbuckle 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
  JEPS81270  Lupinus luteolus L. R. Heckard and J. C. Hickman 1982-7-5 5878 Colusa slope below (s) Summit Springs (s side of Snow Mt.); , s of Summit Springs 1500 Comment
  SBBG122950  Lupinus luteolus B. Ertter 1989-7-1 8616 Colusa rd to Goat Mtn lookout, 0.4 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1371 Comment
  SEINET5558918  Lupinus luteolus H. S. Gentry, S. Koch 1962-1 19769 Colusa 20 mi. W of Williams, along Rt. 20. 396 Comment
  CDA27487  Lupinus microcarpus var. densiflorus L. Ahart 2003-7-14 10390 Colusa On the east and west sides of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. Comment
  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
  SBBG114088  Lupinus microcarpus var. densiflorus R. Riggins 1982-5-30 1448 Colusa Ladoga-Leesville Rd, 4.4 mi N Leesville 457 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
  HSC91380  Lupinus nanus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 19 Colusa 3 times SW of Digger Pine Campground on Goat Rd. 152 Comment
  UC73206  Lupinus nanus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley, near College City Comment
  UCD33935  Lupinus nanus Beecher Crampton 1958-4-21 9166 Colusa 1 mile west of Lodoga. Comment
  CHSC27819  Lupinus succulentus Laurie L. Pate 1978-4-8 87 Colusa 5.1 mi w of Walker Ridge Road, Hwy 20. 457 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 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
  UCD56925  Lupinus succulentus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3528 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  UCD66529  Lycium barbarum Craig D. Thomsen 2000-4-28 2230 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Just west of massive valley oak along Bear Creek, near base of Hwy 20 fill slope. 300 Comment
  RSA74314  Lycopus americanus Milo S. Baker 1946-9-5 11628 Colusa Along Hwy in water ditch betw Colusa & Williams. Comment
  CHSC107290  Lythrum californicum L. P. Janeway; B. Castro 2011-7-9 10509 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Edges of swale feeding south side of the marsh; at the only spot of bulrush. 49 Comment
  CHSC94496  Lythrum californicum Lowell Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1191570  Lythrum californicum Herbert L. Mason, Verne Grant 1946-8-7 12977 Colusa 8 mi n of Colusa (Butte Sink); Butte Sink Comment
  CHSC86838  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  UCD66929  Lythrum hyssopifolia Craig D. Thomsen; G. Harrington 2008-7-6 2773 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
  CDA34965  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa Southeast end of East Park Reservoir, north of Lodoga. Comment
  CHSC106708  Lythrum tribracteatum Barbara Ertter; Elizabeth Neese, laure Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga, narrow strand on shaly substrate. 365 Comment
  CHSC115003  Lythrum tribracteatum Lowell Ahart 2015-4-28 20113 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC86784  Lythrum tribracteatum Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. 103 Comment
  CHSC94480  Lythrum tribracteatum Lowell Ahart 2006-8-9 13162 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS107096  Lythrum tribracteatum Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  SD211626  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, et al 1989-10-21 8870 Colusa Southeast end of East Park Reservoir North of Lodoga, narrow strand on shady substrate 366 Comment
  UCD66865  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5068 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  JEPS110182  Madia elegans subsp. densifolia Lowell Ahart 2006-8-22 13229 Colusa N side and under the bridge across Stony Creek, just N of Stonyford. 347 Comment
  CHSC101633  Madia gracilis David W. Isle; Rhonda Isle, Ann Isle 2003-5-15 1631 Colusa About 6 miles W of Stonyford; N aspect of serpentine chaparral slope S of M-10 (18N01.2) and just W of OHV Trail 30 (18N78) jct. On 8 August 2001 Trough Fire burn site. MDB and M. 585 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
  JEPS80125  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  JEPS83808  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  UCD66442  Madia sativa Craig D. Thomsen 2000-4-28 2191 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UC725449  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa below the road near the foot of the grade e Lodoga; Sites-Lodoga road Comment
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Sep 25 2006
  UCD81259  Malacothamnus fremontii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5424 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD82630  Malacothamnus fremontii Jack Alderson 2009-8-6 26 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Southern part of the ranch, just N of confluence of Bear and Cache Creeks. 243 Comment
  CHSC115622  Malacothamnus fremontii David Isle; Frank Elliott 2014-6-11 2134 Colusa Northern Sacramento Foothills: Frand and Judy Elliott Ranch, 1 mile S of Rail Canyon Rd. Jct. with Ssites-Lodoga Rd. and 1/2 mile S of Sites-Lodoga Rd. SE of Elliott home. (GPSs for Rail Canyon Rd. Jct./Sites-Lodoga Rd.) 10S-0546594E, 4356133N). Comment
  CHSC80037  Malacothamnus helleri L. P. Janeway; Joyce Lacey-Rickert 2000-6-1 6778 Colusa Vicinity of Grapevine Creek, Hayes Canyon, and Eggman Canyon. 335 Comment
  POM282851  Malacothamnus helleri Lyman Benson 1933-6-26 4488 Colusa Abbott mine. 549 Comment
  UC768593  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek Comment
  CDA11410  Malacothrix floccifera G. F. Hrusa, K. van Katwyk 1995-4-22 12131 Colusa Inner North Coast Ranges; Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC27868  Malacothrix floccifera Robin Ondricek 1978-4-8 5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  UCD66682  Malacothrix floccifera Craig D. Thomsen 2000-5-11 2309 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  RSA726801  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UC1368667  Malvella leprosa L. M. Moe 1969-7-29 98 Colusa along Butte Creek ca. 3 mi. n.e. Colusa (also along rd. of Butte Creek Outing Club property); Butte Creek Comment
  RSA121079  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 miles S. of Colusa 15 Comment
  UC71659  Marah fabacea Miss Alice King 1905-1 Colusa College City Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC1051742  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes) 762 Comment
  UCD56908  Medicago polymorpha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3511 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCR205147  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD107923  Medicago sativa Beecher Crampton 1963-8-5 6872 Colusa 3.5 miles south of Grimes. Comment
  CHSC112266  Melica californica Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18639 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
  UCD64416  Melica californica Craig D. Thomsen 2000-4-12 2162 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD86456  Melica californica Beecher Crampton 1958-4-21 4728 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  SEINET11684249  Melica californica Unknown 1971-1 908 Colusa 3.3 mi N of Stony Ford on Elk Creek Road Comment
  CHSC100265  Melica harfordii D. Isle 1988-4-13 1510 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
  UCD56672  Melica torreyana Jack Alderson 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  UCD84546  Melica torreyana Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6144 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
  POM20221  Melilotus albus Roxana Stinchfield 1916-7-9 403 Colusa Overflow land along Sacramento River, Phillips Ranch. Comment
  RSA724820  Melilotus albus L. Ahart 2006-9-26 13349 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road about 3 miles west of Colusa Princeton Road, about 5 1/2 mils east of Maxwell. 24 Comment
  RSA724950  Melilotus indicus L. Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD64430  Melilotus indicus Craig D. Thomsen 2000-4-28 2211 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
  CDA16093  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa North Coast Ranges; Little Stony Creek 457 Comment
  UCD169976  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa Little Stony Creek. 457 Comment
  CHSC94453  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  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
  CHSC84983  Mentha spicata Lowell Ahart 2003-10-23 10666 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
  UCD163656  Mentzelia laevicaulis Craig Thomsen 1998-6-10 1954 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  UCD170080  Mentzelia micrantha Jack Alderson 2016-5-14 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5500 feet (1675 m) south of the intersection of Highway 20 and the Colusa County line. 499 Comment
  UCD163868  Micranthes californica Craig D. Thomsen 2001-4-12 2465 Colusa Bear Creek Canyon, first tributary above Sulphur Creek confluence with Bear Creek. About 3 miles north of Hwy 20. Comment
  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
  POM174563  Micropus californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit on grade. Williams- Stonyford Road Comment
  UCD162998  Micropus californicus Craig D. Thomsen 2000-4-28 2183 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  JEPS40618  Micropus californicus var. californicus W. L. Jepson 1932-5-8 16279 Colusa Lodoga Comment
  RSA424740  Microseris Aaron Liston, M. Blumler 1987-4-26 668 -7 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UC71639  Microseris campestris Miss Alice King 1905-1 Colusa College City Comment
  UCD162974  Microseris douglasii Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 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
  RSA424741  Microseris douglasii subsp. douglasii Aaron Liston, M. Blumler 1987-4-26 668 -4 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UCD163885  Microseris douglasii subsp. douglasii Craig D. Thomsen 2002-4-10 2598 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
  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
  UCD163671  Microsteris gracilis Craig Thomsen 1999-4-15 1971 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC726146  Mimulus bolanderi A. A. Heller 1940-6-7 15720 Colusa e Lodogo (below the road on the Sites-Lodogo road near the end of the grade) Comment
  JEPS75843  Mimulus breweri L. R. Heckard 1974-9-10 3910 Colusa ne slope West Peak; Snow Mt. 2011 Comment
  POM21052  Mimulus cardinalis Roxana Stinchfield 1916-7-9 417 Colusa Philip's Ranch, near Sycamore. Comment
  UCD82726  Mimulus cardinalis Craig Thomsen; G. Harrington 2009-5-14 2909 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS80223  Mimulus guttatus L. R. Heckard and J. Hickman 1980-7-3 5380 Colusa sw slope Snow Mt. (below pipe outlet from spring); Summit Springs 1554 Comment
  RSA0118612  Mimulus guttatus Lowell Ahart 2013-5-1 18688 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD82504  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2864 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UC1049541  Mimulus kelloggii Rimo Bacigalupi 1950-4-16 3105 Colusa vicinity Colusa-Glenn County line (ridge above Red Bridge Camp and the confluence of the North amd Middle Forks of Stony Creek); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  UC1051505  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  UC1191131  Mimulus microphyllus Herbert L. Mason 1953-5-5 14519 Colusa 0.25 above junction of Little Stoney Creek and Trout Creek (at sharp bend in road); Little Stoney Creek drainage Comment
  UCD122648  Mimulus microphyllus R. A. Christison 1960-4-17 28 Colusa on road to Wilbur Springs, 2 miles north of State Highway 20. Comment
  UCD81724  Mimulus nasutus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5728 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCD82576  Mimulus nudatus Craig Thomsen 2008-6-12 2766 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  RSA724962  Mimulus pilosus L. Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  NY90769  Mimulus rattanii V. Rattan 06 1882 s.n. Colusa Above Font's Spr. Coast Mts. North of San Francisco Bay. Comment
  CAS-BOT-BC388583  Minuartia douglasii Annetta Carter 1938-5-7 1377 Colusa Comanche Hills, 4 miles north of Rumsey, Inner North Coast Range 259 Comment
  CHSC77926  Minuartia douglasii Beth Hendrickson; Jean Witzman 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 152 Comment
  CHSC86967  Minuartia douglasii B. Castro 2003-5-15 1436 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Above dirt rd paralleling a S-trending canyon. 179 Comment
  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
  UCD57309  Minuartia douglasii Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3680 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  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
  UCD82385  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-12 2827 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  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
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  IRVC29625  Monardella Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5021 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
  CHSC92639  Monardella odoratissima subsp. odoratissima D. Isle 2005-9-14 1174 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Meadow west of Angel Spring, Snow Mountain Wilderness. 10S 0522348E 4358185N = Angel Springs. Comment
  UCD67691  Monardella sheltonii D. Sanchez-Mata 1996-6-27 s.n. Colusa Williams, Blue Ridge, Bear Creek. 320 Comment
  CHSC106248  Monardella villosa B. Castro; L. P. Janeway 2001-6-3 1261 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
  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
  SD241081  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark Brunell 2006-8-3 4991 Colusa Southern Northern Inner Coast Ranges: Mendocino Nat. Forest; E face of Snow Mountain, Stony Creek along M10. 609 Comment
  UCD81712  Monardella villosa subsp. villosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5718 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
  UCD82537  Monardella villosa subsp. villosa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5690 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UCR219956  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4991 Colusa Northern Inner Coast Ranges, Mendocino National Forest, east face of Snow Mountain, Stony Creek along M10 610 Comment
  UCR261722  Monardella villosa subsp. villosa Ann Howald 2003-5-30 2356 A Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  JEPS15267  Monolopia major Rimo Bacigalupi with G. L. Stebbins, Calvin McMillan, Peter Kamb, and S. Galen Smith 1950-4-16 3118 Colusa base grade (Bartlett Springs road) (western edge of valley); inner edge of easternmost North Coast Ranges, Bear Valley 426 Comment
  UC1484326  Monolopia major G. Hannan 1977-4-22 204 Colusa 12.4 mi n CA Hwy 20 (between Clearlake Oaks and Williams, 1.6 mi s of Brim Rd.) 411 Comment
  UCD163879  Monolopia major Craig D. Thomsen 2002-3-27 2574 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  UCD50183  Muhlenbergia andina Craig D. Thomsen; Art Shapiro 2004-9-16 s. n. Colusa In large patch in roadcut along Goat Mountain Road, Colusa County. Comment
  JEPS15550  Muhlenbergia filiformis G. Thomas Robbins with L. R. Heckard 1956-7-25 3707 Colusa in meadow along trail due s Snow Mt. East (skirting eastern base of ridge forming Snow Mt. West) 1981 Comment
  UC1056271  Muhlenbergia rigens Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3166 Colusa eight mi nw Maxwell (along road to Sites, in canyon between forst hills on extreme w edge of valley); Sacramento Valley Comment
  CAS-BOT-BC514196  Muilla maritima Roxana S. Ferris 1917-4-12 501 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
  UC1028301  Myosurus minimus George B. Rossbach 1955-4-9 270 Colusa 3 mi E of Maxwell; Sacramento Valley 18 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
  UC1101349  Myosurus minimus subsp. apus Herbert L. Mason 1953-4-5 14510 a Colusa 3 mi e of Maxwell Comment
  CHSC28129  Myosurus sessilis K. R. Stern 1979-5-5 Colusa Ca. 0.25 mi w of intersection of Hwy 20 and Int. Hwy 5. Vernal pool on n side of road, ca. 0.5 mi nw of Williams. 152 Comment
  UC1738124  Myosurus sessilis D. E. Stone 1956-10-9 1- 8 -1 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  POM312437  Myosurus sessilis H. L. Mason 1953-4-5 14510 Colusa 3 miles east of Maxwell Comment
  UCR227337  Najas graminea Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5106 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UCD138157  Najas guadalupensis subsp. guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa 2 miles west of Colusa on Williams highway by bridge. Comment
  CHSC49580  Nassella cernua Vernon Oswald 1984-5-2 1165 Colusa Fouts Springs Rd. (M10) in the Mendocino National Forest, 4.6 mi w of Stonyford. 487 Comment
  UCD82446  Nassella lepida Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5662 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 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
  UCD81229  Navarretia Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5566 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destanella Flat area on the S side of Hwy. 20. West side of Destinella Flat. 446 Comment
  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
  RSA424699  Navarretia eriocephala Aaron Liston, M. A. Blumler 1987-4-26 668 -5 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CHSC88556  Navarretia jepsonii L. P. Janeway 2001-6-6 7127 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  JEPS104075  Navarretia jepsonii Lowell Ahart 2003-7-14 10385 Colusa Field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  UC908635  Navarretia jepsonii Herbert L. Mason 1946-5-31 12810 a Colusa near summit of Leesville Grade (drainage of n fork of Cache Creek); Cache Creek 548 Comment
  UCR197901  Navarretia jepsonii Calvin McMillan, Beecher Crampton (494F) 1949-9-25 s.n. Colusa 18 miles east of Bartlett Springs Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  RSA537266  Navarretia leptalea P. H. Raven, Richard Snow 1959-9-11 14421 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 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
  UCR225393  Navarretia nigelliformis Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5082 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa counties. South of junction with trail that heads down to the headwaters of Thompson Creek 429 Comment
  CHSC85965  Navarretia nigelliformis subsp. nigelliformis Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 137 Comment
  UCD63775  Navarretia nigelliformis subsp. nigelliformis Craig D. Thomsen 2008-5-31 2756 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
  CHSC1298  Navarretia pubescens V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  UC584174  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 mi w Williams (on Bartlett Springs road) 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
  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
  RSA537450  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  CHSC76510  Nemacladus montanus Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  UCD82741  Nemacladus montanus Craig Thomsen; G. Harrington 2009-5-14 2922 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  UC598446  Nemophila heterophylla Milo S. Baker April, 1938 Colusa Williams Highway near Lake County Line; near Lake County Line Comment
  UC72014  Nemophila heterophylla Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City 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
  JEPS2989  Nemophila menziesii Alice King May, 1908 Colusa College City Comment
  JEPS3136  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  JEPS94183  Nemophila menziesii var. menziesii Vernon Oswald and Lowell Ahart 1998-4-21 8949 Colusa Rd. 401 1.8 mi. n. Grapevine Pass (on the Sites-Lodoga Rd.) 472 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
  UCR228648  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 1312 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
  RSA537462  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  UC1586079  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  UC595048  Nemophila pedunculata Annetta Carter 1938-5-8 1381 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC38962 Image available Neostapfia colusana J. Burtt Davy 1898-5-26 Colusa near Princeton; ; Princeton, Colusa Co. Comment
  RSA0000499  Neostapfia colusana Jos Burtt Davy 1898-05 s.n. Colusa Near Princeton. Comment
  CAS-BOT-BC400054  Nuphar polysepala F. P. Cronemiller 1924-6-26 892 Colusa Upper Letts Swamp 1371 Comment
  UC1229784  Orobanche bulbosa G. Newcomb, F. Chisaki 1958-6-23 1165 Colusa North Coast Range, on John Smith Road John Smith Road; North Coast Range, John Smith Road Comment
  UCD66934  Orobanche bulbosa Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5083 Colusa BLM Payne Ranch. Lands to the SW of jct of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa Counties. South of junction with trail that heads down to the headwaters of Thompson Creek. 568 Comment
  UC1187361  Orobanche californica subsp. grayana Herbert L. Mason 1945-7-11 12647 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. 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
  UCD163335  Orobanche fasciculata Craig D. Thomsen 2009-5-3 2806 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  RSA0076585  Orobanche fasciculata Frank W. Gould 1938-4-22 283 Colusa At head of Capay Valley, west of Arbuckle. Comment
  SEINET5766934  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton Comment
  UC71779  Orobanche vallicola H. P. Chandler 1905-10-1 Colusa Princeton Comment
  RSA402037A  Orthocarpus lithospermoides Jens Clausen 1935-5-20 1018 Colusa Ca. 27 mi W of Williams after having passed the Wilbur Springs road. Along Bear Creek. Comment
  POM231093  Orthocarpus lithospermoides var. bicolor Jens Clausen 1935-5-20 1018 Colusa Ca. 27 mi W of Williams after having passed the Wilbur Springs road. Along Bear Creek. 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
  SEINET12270141  Orthocarpus lithospermoides var. bicolor A. Carter, Kellogg, L. 1953-1 3239 Colusa road to Leesville, 6 mi N of Wilbur Springs Junction 400 Comment
  RSA430221  Orthocarpus purpurascens var. purpurascens Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  JEPS80775  Osmorhiza berteroi L. R. Heckard and J. C. Hickman 1981-7-30 5748 Colusa Trout Creek trail Snow Mt. (se slope of mt.) 1645 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
  CHSC88558  Packera clevelandii L. P. Janeway 2001-6-6 7117 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  JEPS105741  Packera clevelandii David Gowen 2004-6-24 134 Colusa South of Stonyford. Approx. 1.8 miles along Goat Mt. Road from its junction with the paved road to Stonyford. Comment
  UC1299450  Packera clevelandii Freed W. Hoffman 1947-6-19 1672 Colusa Cooks Springs North Coast Ranges Comment
  UCD110420  Packera clevelandii Daniel Slakey; CNPS volunteers 2011-6-12 6 Colusa Walker Ridge. Wet meadow area on E side of Walker Ridge Rd. About 18 km N of Hwy.20 by road. 876 Comment
  UCD134746  Packera clevelandii A. M. Shapiro 1994-6-12 s.n. Colusa along Goat Mountain Road, between Sullivan Creek and Summit Lookout. Comment
  UCD64029  Packera clevelandii Craig D. Thomsen 2000-5-11 2286 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCD163313  Packera eurycephala Craig D. Thomsen 1997-4-13 1902 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD66559  Packera greenei Craig D. Thomsen 2001-5-24 2438 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82522  Packera greenei Craig Thomsen; G. Harrington 2009-5-12 2879 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCD89786  Panicum capillare subsp. hillmanii Beecher Crampton 1969-6-18 8457 Colusa 1.5 miles south of Williams. Interstate Hwy. 5 northbound. Comment
  CHSC70988  Papaver rhoeas Vernon Oswald; Lowell Ahart 1998-5-7 8990 Colusa Sites-Lodoga Rd. just west of Grapevine Pass and County Rd. 401 to Elk Creek: Chaparral. 481 Comment
  UCD36222  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa Colusa County, 2 miles east of Maxwell. Comment
  CDA11257  Parnassia californica G. F. Hrusa 1994-11-7 11992 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. Frenzel Creek a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  UCR115039  Parnassia californica G. Fred Hrusa 1994-11-7 11993 Colusa Banks of Little Stony Creek, c. 2.5 mi above Stonyford-Lodoga Rd. on Goat Mtn Road. 440 Comment
  CHSC86879  Pectocarya pusilla B. Castro 2003-4-1 1411 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, on low N-facing cutbank of dirt road which contours along hillside through area of cutover blue oak woodland. 280 Comment
  UC1177895  Pectocarya pusilla Peter M. Ray 1950-4-16 1738 Colusa 2 mi s Lodoga (on rd to Leesville) 381 Comment
  CHSC90083  Pedicularis densiflora Ross Rowland 2001-3-30 17 Colusa On hillside at the junction of Walker Ridge Road and Bear Valley Road. 545090mE/4334280mN/zone 10N. 663 Comment
  SEINET11263257  Pedicularis densiflora Richard R. Halse 2014-3-25 9035 Colusa Along the Bear Valley Road ca. 1.8 miles WNW of its junction with State Hwy 20.; 0 378 Comment
  UC1051747  Pediomelum californicum Helen K. Sharsmith 1953-6-21 4304 Colusa ca 1 mi within boundary of Mendocino National Forest (slopes of Little Stoney Creek); Mendocino Nat For, Little Stoney Creek, Inner N Coast Ranges 670 Comment
  UCD66581  Pediomelum californicum Craig D. Thomsen 2001-5-24 2526 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC77906  Pellaea andromedifolia Beth Hendrickson; Jean Witzman, Mary Ann Griggs 1999-3-16 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 158 Comment
  UC1212587  Penstemon heterophyllus Francia Chisaki, Helen K. Sharsmith 1959-5-26 1330 Colusa on road to Red Bridge Camp at North Fork of Stony Creek crossing; Inner North Coast Ranges, North Fork Stony Creek Comment
  RSA407923  Penstemon heterophyllus subsp. purdyi Jens Clausen 1935-5-20 1009 Colusa Ca 12 mi SW of Williams on Barlett Springs Road. Comment
  NY601765  Penstemon heterophyllus var. purdyi A. A. Heller 1919-5-10 13118 Colusa Valley west of Leesville 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
  UC1532348  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near the Lily Pond and Letts Lake. 1188 Comment
  JEPS75733  Perideridia kelloggii L. R. Heckard 1974-9-9 3875 Colusa Just northeasts of rocky promontory southeast of Foutch Camp; Snow Mts. Comment
  UCR281727  Perideridia kelloggii David Isle, Frank Pendell 2014-6-16 2135 Colusa North Coast Range, c. 2 miles west of Stonyford on the Pendell Ranch, southeast of the home of Frank and Sheri Pendell c. 0.25 mile and northwest of the Stonyford Cemetary, c. 200 yards 384 Comment
  CHSC112625  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  RSA0118884  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCD72534  Petrorhagia dubia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3825 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.5 mile downstream of bridge. 246 Comment
  JEPS2272  Phacelia ciliata var. ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  UC73691  Phacelia ciliata var. ciliata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CDA16099  Phacelia corymbosa G. F. Hrusa 1999-5-16 15044 Colusa North Coast Ranges; above Fouts Springs. 594 Comment
  JEPS73516  Phacelia corymbosa L. R. Heckard 1972-7-10 3134 Colusa w Trout Creek; Snow Mt. 1828 Comment
  JEPS95504  Phacelia distans Vernon H. Oswald and L. Ahart 1994-3-23 6021 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  UCD64438  Phacelia divaricata Craig D. Thomsen 2000-4-4 2071 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC12748  Phacelia egena L. V. Ritter 1969-4-30 227 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. Comment
  SD58509  Phacelia egena L. R. Heckard, C. R. Bell 1951-6-14 176 Colusa West facing serpentine slope near Stonyford. 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
  UCD66688  Phacelia imbricata Craig D. Thomsen 2000-5-11 2317 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66695  Phacelia imbricata Craig D. Thomsen 2000-6-23 2381 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC60747  Phacelia imbricata subsp. imbricata Vernon H. Oswald; Lowell Ahart 1993-5-27 5430 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). 481 Comment
  CHSC79517  Phacelia imbricata subsp. imbricata B. Castro; L. P. Janeway 2000-5-2 1109 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  JEPS2143  Phacelia imbricata subsp. imbricata W. L. Jepson 1932-5-8 16296 Colusa n Stonyford (w Colusa Co.) 365 Comment
  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
  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
  UCD164156  Phacelia tanacetifolia Craig Thomsen 2008-4-7 2726 Colusa Bear Creek Canyon, along Bear Valley Rd. about 0.75 mile north of junction with Hwy 20. Comment
  HSC45512  Phacelia tanacetifolia M. Alcasas 1978-4-22 48 Colusa Bear Valley Rd., 2.3 mi. from Hwy. 20 419 Comment
  UCR227636  Phalaris aquatica Craig D. Thomsen, Gordon Harrington 2008-7-6 2779 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
  UCD88339  Phalaris brachystachys Beecher Crampton 1961-7-20 5936 Colusa 8 miles SE of Grimes. Comment
  POM163470  Phalaris lemmonii Roxana S. Ferris 1926-4-21 6282 Colusa 3 mi W of Colusa.. Comment
  CAS-BOT-BC265956  Phalaris minor Roxana S. Ferris 1917-4-12 508 Colusa 4 miles east of Williams Comment
  CAS-BOT-BC265957  Phalaris minor Roxana S. Ferris 1926-4-22 6287 Colusa 3 miles west of Colusa Comment
  UCD89177  Phalaris minor Hursh 1919-1 X 3340 Colusa Williams. Comment
  SEINET10657421  Phalaris minor Roxana S. Ferris 1917-4-12 Ferris 508 Colusa 4 mi. east of Williams; Alkali Plains Comment
  UCD66454  Phalaris paradoxa Craig D. Thomsen 2000-5-12 2322 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  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
  HSC103841  Phoradendron bolleanum G. Fred Hrusa, K. van Katwyk 1995-4-22 12109 Colusa North end of Walker Ridge, ~1 mi. south of intersection with Bartlett Springs Rd. Parasite on Cupressus macnabiana 1000 Comment
  CAS-BOT-BC135299  Phoradendron serotinum subsp. macrophyllum Roxana S. Ferris 1917-4-15 623 Colusa Sycamore. Sycamore Slough Comment
  JEPS106503  Phragmites australis L. P. Janeway, B. Castro 2001-6-3 7098 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain 884 Comment
  UC1124395  Phyla caespitosa H. S. Yates 1936-8-14 6134 Colusa 3 mi S of Colusa 15 Comment
  CHSC80450  Physalis lancifolia Caroline Warren; Jenny Marr, Heidi West 1998-7-1 Colusa Vicinity of Peterson Road and Funks Creek. 91 Comment
  RSA140862  Physalis lancifolia John H. Thomas 1960-8-30 8866 Colusa About 5 miles northwest of College City along road to Sycamore. Comment
  SD236433  Physalis lancifolia G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14270 Colusa Sacramento Valley: along CA-20, 2 miles west of Meridian 14 Comment
  UCD80817  Pickeringia montana Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5273 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. E-facing slope above Eula Canyon. Between the headwater areas of Craig and Eula Canyons. 528 Comment
  CHSC68546  Pickeringia montana var. montana Vernon Oswald; David Isle, Rhonda Isle 1997-5-3 8362 Colusa Inner North Coast Range. Goat Mtn. Rd. on Pine Ridge, southwest of Stony ford. 807 Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  CAS-BOT-BC72814  Pinus sabiniana Roxana S. Ferris 1917-4-14 578 Colusa Arbuckle-Rumsey road, 7 mi. west of Arbuckle foothills. Comment
  JEPS110173  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  JEPS118697  Pisum sativum B. Castro with T. Boullion 2011-4-20 1847 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 east of bend in Tehama-Colusa Canal. Sites 7.5' quad. Comment
  CHSC89829  Plagiobothrys austiniae B. Castro; S. Innecken 2001-3-20 1215 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CAS-BOT-BC230037  Plagiobothrys canescens Stephanie Castle; 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, north of Craig Creek 304 Comment
  SFV3146  Plagiobothrys canescens A. Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Just south of wooden bridge. Comment
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  CHSC89833  Plagiobothrys greenei B. Castro; S. Innecken 2001-3-19 1214 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 48 Comment
  JEPS116661  Plagiobothrys infectivus B. Castro with Robin Carter, Amy Lyons 2010-5-18 1812 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir and the Tehama-Colusa canal, Eastside Road/Rd 69 extension route. Logan Ridge 121 Comment
  CHSC31262  Plagiobothrys leptocladus R. A. Schlising; K. R. Stern 1980-5-5 3584 Colusa Southwest of Colusa at Colusa National Wildlife Refuge; south end of refuge, several miles north of Ware Road; on 'salt flats'. Comment
  CDA32833  Plagiobothrys stipitatus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC48203  Plagiobothrys stipitatus var. micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3953 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  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
  UCR206851  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14359 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  CDA11408  Plagiobothrys stipitatus var. stipitatus G. F. Hrusa, K. van Katwyk 1995-4-22 12129 Colusa Inner North Coast Ranges; along roadside in Bear Valley. 15 m. N of Hwy. 20. Comment
  UCD63009  Plagiobothrys stipitatus var. stipitatus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 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
  JEPS90081  Plagiobothrys tenellus Dean W. Taylor 1992-4-16 12402 Colusa hillsides ca. 0.4 mi. due w. from spillway into Little Stony Creek (East Park Reservoir); Inner N. Coast Range, Gilmore Peak Quad. 411 Comment
  UCD97126  Plagiobothrys tenellus Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6910 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  CAS-BOT-BC60834  Planodes virginica Doris K. Kildale 1928-5-8 5017 Colusa 3 miles south of Arbuckle. Comment
  CHSC86843  Plantago coronopus 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
  CHSC94420  Plantago coronopus Lowell Ahart 2006-8-9 13154 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC107956  Plantago elongata B. Castro; T. Boullion 2011-4-20 1839 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  CHSC59997  Plantago erecta Linda A. Bell 1975-4-19 44 Colusa Bear Valley Road, 1 mile north of State Highway 20. Comment
  HSC72167  Plantago erecta J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9542 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. 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
  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
  UCD82366  Plantago erecta Robin McMaster 1973-4-15 336 Colusa Bear Valley. Comment
  JEPS110098  Plantago lanceolata Lowell Ahart 2006-8-9 13153 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
  UC118440  Platystemon californicus T. S. Brandegee April 1889 Colusa Stites Comment
  UCD164029  Platystemon californicus Indya Messier 2016-4-9 3 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just southwest of corral at junction of 16 and 20. 324 Comment
  CDA34082  Platystemon californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC112021  Platystemon californicus David Isle 1977-4-5 2068 Colusa Mendocino National Forest. About 1.3 mile NE of Fouts Springon Upper Davis Flat. 493 Comment
  HSC86821  Platystemon californicus Dana J. Lenarz 1982-3-27 3 Colusa .5 km W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 29 km SW of Williams 322 Comment
  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
  RSA590191  Platystemon californicus var. californicus Michael A. Vincent, Robert Rhode 1996-3-30 7293 Colusa Along Bear Valley Road, 4.6 miles N of junction Wilbur Springs Road Comment
  UCD82392  Plectritis ciliosa Craig Thomsen; G. Harrington 2009-5-12 2835 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  UCD137585  Plectritis ciliosa Gene R. Williams 1961-3-25 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Highway 20. Comment
  CHSC62948  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald; Lowell Ahart 1994-4-6 6066 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  UC1613289  Plectritis ciliosa subsp. ciliosa Charles M. Belshaw 1937-4-25 2848 Colusa vicinity of Cook's Spring, Devil's Ridge; Inner N. Coast Range Comment
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County Comment
  UCD81235  Plectritis congesta subsp. brachystemon Barry Rice; E. Dean, G. Harrington, J. Alderson, M. Bibbo 2009-3-25 s.n. Colusa Bear Creek (formally Payne) Ranch. Lands to the SW of the jct of Hwys 20 and 16. Southern part of the ranch on the south side of a canyon that is immediately north of Brophy Canyon. 274 Comment
  JEPS16087  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  JEPS95488  Plectritis macrocera Vernon H. Oswald and L. Ahart 1994-4-6 6067 A Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UC999820  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 698 Colusa near Williams Comment
  UCD162996  Plectritis macrocera Craig D. Thomsen 2000-3-31 2085 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.75 mile west of Hwy 20/16 intersection. 345 Comment
  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
  POM204747  Poa annua A. A. Heller, H. E. Brown 1902-5-2 7449 Colusa Princeton. Comment
  RSA31153  Poa annua A. A. Heller, H. E. Brown 1902-5-2 5439 Colusa Princeton. Comment
  RSA756857  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-11 14360 Colusa along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UCD163710  Poa annua Craig Thomsen 1999-5-10 2022 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  SEINET10822495  Poa bulbosa K. E. Warwick 1978-4-8 Warwick 21 Colusa Salt Creek Canyon, n side of Salt Creek, Hwy 20, 11 mi WSW of Williams. Ca. 100 ft. S of Hwy 20, in open area. Wilbur Springs Quadrangle, 15'. E central border of Sect. 32. T15N, R4W. Comment
  SEINET11686444  Poa bulbosa var. vivipara S. M. Leary 1978-1 3 Colusa N side of Salt Creek, S side of Hwy 20, 11 mi WSW of Williams 143 Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  CAS-BOT-BC236333  Poa secunda subsp. secunda Roxana S. Ferris 1917-4-14 575 Colusa Arbuckle - Rumsey Road. Foothills W of Arbuckle Comment
  CHSC112213  Poa secunda subsp. secunda Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18643 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC33326  Poa secunda subsp. secunda P. Reynolds 1980-4-12 15 Colusa Ca. 0.3 mi. w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 mi. sw of Williams. 321 Comment
  UCD81247  Poa secunda subsp. secunda Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5411 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  UCD90886  Poa secunda subsp. secunda John R. Davey 1967-12-2 90 Colusa Border, ca. 5-6 miles WSW of Leesville, Bartlett Springs Road N of Baldy Mountain. 609 Comment
  JEPS62433  Pogogyne douglasii W. L. Jepson 1920-5-23 8966 Colusa near Leesville, foot of Bartlett grade, west side of Bear Valley, w Colusa Co. Comment
  CHSC107975  Pogogyne zizyphoroides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1858 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  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
  JEPS104398  Polygonum amphibium var. emersum Lowell Ahart 2003-10-23 10656 Colusa In East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  UC1192334  Polygonum amphibium var. emersum Herbert L. Mason and Verne Grant 1946-8-6 12970 Colusa pond 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  CHSC85960  Polygonum aviculare Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CHSC86836  Polygonum aviculare 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
  JEPS81372  Polygonum davisiae L. R. Heckard and J. C. Hickman 1982-7-8 5983 Colusa just n summit marker (West Peak and Cirque from West Peak); Snow Mt. 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
  RSA724951  Polypogon interruptus L. Ahart 2006-8-9 13159 Colusa between the southwest 1/4 and southeast 1/4; under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC232540  Polypogon monspeliensis Roxana Stinchfield 1916-6-17 287 Colusa At levee, Tule near College City Comment
  CHSC77410  Polypogon monspeliensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC94414  Polypogon monspeliensis Lowell Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75436  Polypogon monspeliensis W. L. Jepson 1934-5-3 16602 Colusa n Colusa (Stegeman Sta.) Comment
  JEPS75438  Polypogon monspeliensis W. L. Jepson 1934-5-4 16604 Colusa Princeton Comment
  POM206735  Polypogon monspeliensis A. A. Heller 1902-5-19 5570 Colusa Near Colusa. Comment
  UCD18842  Polypogon monspeliensis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 149 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  JEPS80814  Polystichum imbricans subsp. imbricans L. R. Heckard and J. C. Hickman 1981-7-31 5787 Colusa e side Snow Mt. (Fouts Springs Overlook) 1783 Comment
  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
  CAS-BOT-BC102381  Populus fremontii Roxana S. Ferris 1917-4-17 624 Colusa Sycamore, Sycamore Slough Comment
  HSC86897  Populus fremontii subsp. fremontii Anthony J. Desch, Bryon Cariss 1988-4-17 36 Colusa Goat Mountain Rd. 7 mi. W from its junction with Stonyford Rd. Comment
  CHSC96689  Portulaca oleracea Lowell Ahart 2006-8-22 13232 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC46886  Potamogeton pusillus var. tenuissimus Vernon Oswald 1989-9-12 4006 Colusa Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. On the edge of the lake. 1365 Comment
  RSA0013900  Proboscidea louisianica J. C. Roos 1948-9-2 4024 Colusa West of Williams. Comment
  JEPS27878  Proboscidea louisianica subsp. louisianica Richard Snow 1958-8-3 672 Colusa on road to Leesville near Hwy 20 Comment
  JEPS8022  Proboscidea louisianica subsp. louisianica Rimo Bacigalupi with L. R. Heckard 1951-8-6 3471 Colusa 4.6 mi nw Sites (along road between Sites and Lodoga) Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  CHSC1582  Prunus emarginata F. Wigmore 1931-5-1 Colusa Stony Creek gorge. Comment
  UCD141584  Prunus subcordata Ellen Dean 2013-4-3 7596 Colusa BLM Bear Creek Ranch (previously Payne Ranch), at intersection of HWY 16 and HWY 20. Main part of ranch near Roadkill Cafe, along South side of Thompson Creek, Southeast of Roadkill Cafe. 384 Comment
  UCD67072  Pseudognaphalium californicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  JEPS120792  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCR119099  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa Sacramento Valley, 3 miles east of Maxwell 91 Comment
  UCD133714  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CHSC101626  Psilocarphus brevissimus var. brevissimus David W. Isle 2002-4-18 1657 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) Edge of E-flowing ephemeral drainage in chamise site burned during 8/8/01 Trough Fire and part of Helicopter Hydromulch Study Plot. 524 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
  CHSC115394  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  JEPS124212  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  UC638695  Psilocarphus tenellus Ethel Crum 1938-5-7 2010 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCD58125  Psilocarphus tenellus Ellen Dean; PLB 102 Class 2007-4-29 3721 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Near 'Roadkill Cafe. 414 Comment
  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
  CHSC112221  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC62847  Pterostegia drymarioides Vernon H. Oswald; Lowell Ahart 1994-3-23 6018 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Growing at the base of an outcropping of serpentine. 505 Comment
  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
  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
  UCD163707  Puccinellia simplex Craig Thomsen 1999-5-10 2019 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  JEPS15216  Purshia tridentata var. tridentata Rimo Bacigalupi with L. T. Dempster, Mrs. P. A. Munz and G. T. Robbins 1956-7-25 5747 Colusa about 0.75 mi w Fouts Camp (s shoulder of Snow Mountains, Colusa-Lake County boundary); Snow Mountains 1905 Comment
  UCD84509  Quercus X morehus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6060 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD45291  Quercus berberidifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Stonyford. Fouts Spring Road. Open interior live oak scrub chaparral (Quercus wislizenii var. frutescens) in deforested slopes. Comment
  UCD83633  Quercus berberidifolia Fanny Ye; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 Comment
  UCD81241  Quercus chrysolepis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5405 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
  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
  CAS-BOT-BC86603  Quercus douglasii Roxana S. Ferris 1917-4-14 580 Colusa 7 mi W of Arbuckle - Rumsey Road Comment
  UC993117  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UCD57708  Quercus douglasii Daniel Chau; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  UCD13383  Quercus durata Charles Martin 1986-5-17 31 Colusa 5.7 miles west of Stonyford, along Foot Springs Rd. Comment
  UCD45981  Quercus durata D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. Serpentine chaparral. 850 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
  SEINET13953266 Image available Quercus durata Steven Lagos 1974-1 51 Colusa Wilbur Springs Quad., 3000 ft. 914 Comment
  CHSC79514  Quercus durata var. durata L. P. Janeway 2000-5-31 6774 Colusa Inner North Coast Ranges. On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. 884 Comment
  HSC31697  Quercus durata var. durata Thomas E. Higley 1974-5-4 64 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  JEPS82547  Quercus garryana var. breweri L. R. Heckard 1983-7-27 6112 Colusa s flank Snow Mt. (slopes around Summit Springs) Comment
  CDA16104  Quercus garryana var. garryana G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15249 Colusa North Coast Ranges; Goat Mtn. 1706 Comment
  UC1051744  Quercus kelloggii Helen K. Sharsmith 1953-6-20 4300 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 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
  UCD14526  Quercus palmeri Roger Raiche 1990-12-2 C Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD14529  Quercus palmeri John M. Tucker 1991-8-19 4496 -A Colusa California, Colusa Co.; across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs; Comment
  UCD47645  Quercus wislizeni Jean Addicott 1963-5-12 44 Colusa On road to Leesville, 16 miles north of junction of State Highways 16 and 20. Comment
  UCD84513  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6064 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
  CHSC33068  Rafinesquia californica Thomas Nelson; Jane Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  HSC48162  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 Comment
  UCD159337  Rafinesquia californica D. S. Park; E. Dean 2010-6-5 121 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  JEPS80085  Ranunculus alismifolius L. R. Heckard with J. Hickman 1979-6-16 5092 Colusa about 1/2 mi s Milk Ranch (nw of West Peak, Snow Mt.) 2011 Comment
  UCR212367  Ranunculus arvensis Craig D. Thomsen 2000-5-12 2324 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CAS-BOT-BC378936  Ranunculus californicus var. californicus Roxana Ferris 1917-4-15 612 Colusa Sycamore Slough Comment
  CAS-BOT-BC378937  Ranunculus californicus var. californicus Roxana Ferris 1926-4-21 6296 Colusa abandoned rice field 2 mi west of Colusa Comment
  SEINET11587858  Ranunculus canus Unknown 2009-3-11 14373 Colusa Williams Comment
  JEPS87656  Ranunculus hebecarpus Vernon H. Oswald and Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 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
  UCD169733  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCD56912  Ranunculus occidentalis Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3515 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  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
  UCD97058  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins; S. Galen Smith 1950-4-15 1907 Colusa Bear Valley. Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  UCR257577  Raphanus sativus George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22509 Colusa Sacramento Valley, along CA-20 at Sycamore Cutoff, 1.3 miles west of the Sacramento River crossing 20 Comment
  JEPS75868  Rhamnus californica L. R. Heckard 1974-9-10 3880 Colusa East Circle Trail, along spur running se from the w peak, Snow Mt. Snow Mt. 2011 Comment
  CDA15463  Rhamnus tomentella subsp. crassifolia G. F. Hrusa, WTD 1998-6-19 14599 Colusa North Coast Ranges; Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CDA16114  Rhamnus tomentella subsp. crassifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15239 Colusa North Coast Ranges; Along Little Stony Creek. 0 Comment
  CHSC105169  Rhamnus tomentella subsp. crassifolia B. Castro; L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  JEPS41964  Rhamnus tomentella subsp. crassifolia W. L. Jepson 1920-5-23 8975 Colusa hills w of Bear Valley (on grade over ridge to Indian Valley) Comment
  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
  RSA275357  Rhamnus tomentella subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley road , 2.5 miles from jct with State Route 20, Oak Woodland 366 Comment
  UC1618009  Rhamnus tomentella subsp. tomentella Donald G. Nelson 1940-6-9 693 Colusa e. slopes Snow Mt. (at Happy Camp a private summer camp on Paradise Creek which empties below into the Middle Fork of Stony Creek, n.w. boundary of county); , Happy Camp 731 Comment
  UCD111678  Rhododendron occidentale Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  UCD117941  Rhododendron occidentale George F. Hrusa 1989-5-5 6066 Colusa Open margin of Little Stony Creek, along Rd. to Cedar Camp. 1.5 m. SW of intersection of Stonyford-Lodoga Rd. 470 Comment
  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
  CDA38890  Rhododendron occidentale var. californicum A. T. Leiser 1985-5-19 s.n. Colusa Between 3-4 miles along Frenzel Creek as it parallels the road M5 from Lodoga to Goat Mtn. Frenzel Creek is on south side of road and down 30-40 ft. 0 Comment
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 Comment
  JEPS15562  Ribes lobbii G. Thomas Robbins with L. R. Heckard 1956-7-25 3718 Colusa about 50 yards below summit Snow Mt. West (ridge between east and west peaks of Snow Mt.); Snow Mt. 2133 Comment
  JEPS75853  Ribes lobbii L. R. Heckard 1974-9-10 3901 Colusa ne slope West Peak; Snow Mt. 2103 Comment
  CAS-BOT-BC168901  Ribes malvaceum Eric Peterson; Matt Foruria; Tom Ward 1995-4-2 59 Colusa 4.3 north on Walker Ridge Road from jct with Hwy 20 822 Comment
  UCD80841  Ribes malvaceum Jack Alderson 2009-2-21 22 Colusa BLM Payne Ranch (Bear Creek Ranch), lands to the SW of intersection of Hwys 16 and 20. South side of Brophy Canyon. 426 Comment
  UCR281724  Ribes malvaceum David Isle 2015-6-20 2156 Colusa North Coast Range, c. 4 miles west of Stonyford, southeast of curve at culvert crossing just east of old dumpsite road junciton, uphill c. 200 ft south of 18N01 439 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
  UCD97117  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6900 Colusa Along Bear Valley Rd on west and east sides of road. 355 Comment
  CHSC90878  Ribes roezlii D. Isle 2003-6-24 214 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. UTM's: 10S 0523825E 4346753N. 1767 Comment
  LA97624  Ribes roezlii J. M. Tucker; 1959-5-30 3524 Colusa Goat Mountain, ca. 1.25 mi. NW of Goat Mountain Lookout 1767 Comment
  SFV14515  Ribes roezlii M. L. Vincent 1968-6-6 786 Colusa Goat Mountain Road, 1 mile from Stony Ford turnoff. 1825 Comment
  UC1543162  Rigiopappus leptocladus Charlotte G. Nast 1936-4-17 148 Colusa Williams to Lake Co. Road Comment
  UCD66448  Rigiopappus leptocladus Craig D. Thomsen 2000-5-11 2293 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCR212316  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CDA8541  Rigiopappus leptocladus T. C. Fuller 1958-5-27 3668 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS80179  Rigiopappus leptocladus L. R. Heckard with J. Hickman 1980-7-3 5331 Colusa just w Summit Springs (sw <side of?> mt., ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  CHSC84969  Rorippa curvisiliqua var. orientalis Lowell Ahart 2003-10-23 10664 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
  CHSC86881  Rorippa nasturtium-aquaticum B. Castro; S. Innecken 2003-4-2 1412 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. In bottom of small stream. 167 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
  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-BC158728  Rubus ursinus Roxana Stinchfield 1916-7-8 381 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC433469  Rumex dentatus Roxana S. Ferris 1926-4-21 6285 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
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Jul 31 2014
  UCD57287  Saccharum ravennae Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3658 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
  CHSC79280  Sagina apetala B. Castro; L. P. Janeway 2000-4-10 1063 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 91 Comment
  CHSC77928  Sagina decumbens subsp. occidentalis Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 Comment
  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
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CAS-BOT-BC103026  Salix bonplandiana Roxana S. Ferris 1926-4-23 6401 Colusa near Mountain House on Williams - Stonyford Road Comment
  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
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD162977  Salix breweri Jack Major 1963-5-4 s.n. Colusa In stream, west of Bear Valley on Bartlett Springs Road. (Exact location unknown. Coordinates estimated by label maker.) 518 Comment
  UCD56940  Salix breweri Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3542 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CAS-BOT-BC107839  Salix gooddingii Gordon H. True 1968-8-6 4576 Colusa In roadside ditch, on Hwy. between Maxwell and Delevan, ca. 1 mile N of Maxwell 30 Comment
  CAS-BOT-BC107840  Salix gooddingii Alice Eastwood 1921-4-11 10235 Colusa Colusa 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
  UCD57306  Salix laevigata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3677 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  UCD61464  Salix laevigata Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3910 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  UCD82128  Salix laevigata Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5658 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  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
  CDA16096  Salix lasiolepis G. F. Hrusa 1999-5-16 15047 Colusa North Coast Ranges; Goat Mountain on S side. At intersection of rd to Young's Corral and Goat Mtn Lookout. 1737 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
  JEPS122457  Salix lasiolepis David Isle with David Toren 2003-6-24 2128 Colusa Mendocino National Forest. NE border of Veratrum spring & meadow, 1/4 mi E of Goat Mtn Rd 16N03 junction w/Horse Glade Rd; (with flowing water) Comment
  JEPS80250  Salix lasiolepis L. R. Heckard and J. Hickman 1980-9-15 5429 Colusa slopes below Summit Springs; Snow Mt., <Lake-Colusa Co. boundary> 1524 Comment
  CAS-BOT-BC107365  Salix lasiolepis var. lasiolepis Roxana S. Ferris 1917-4-17 631 Colusa near Sycamore Comment
  JEPS80820  Salix melanopsis L. R. Heckard and J. C. Hickman 1981-7-31 5791 Colusa e side Snow Mt. (<along> Dark Hollow Creek) 1584 Comment
  CHSC108062  Salsola soda B. Castro; Dave Boegner 2011-9-1 1913 Colusa Sacramento Valley. Larkins Childrens Rancho. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Uncommon along outer western edge of managed +- saline wetland of Gunnersfeld Ranch duck hunting club. 17 Comment
  CHSC27518  Salvia columbariae Michael F. Henetz 1978-4-15 16 Colusa Ca. 65 m n of Salt Creek, ca 15 m n of Hwy. 20, ca. 17.7 km wsw of Williams. 143 Comment
  CHSC27550  Salvia columbariae Scott E. Patton 1978-4-9 7 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 m wsw of Williams. 143 Comment
  JEPS75722  Sambucus mexicana L. R. Heckard 1974-9-9 3855 Colusa about 1/4 mi se Foutch Camp (e side of about 60 ft high rocky outcrop); Snow Mt. 1828 Comment
  UCD57658  Sambucus nigra subsp. caerulea Hildegarde Durkin; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. North side of Thompson creek. Along trail above Thompson Creek 362 Comment
  UC1053451  Sanicula bipinnata Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3170 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  CHSC89863  Sanicula crassicaulis B. Castro; L. P. Janeway 2001-4-19 1232 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. In riparian corridor along dirt road adjacent to perennial N-S-trending creek. 277 Comment
  JEPS73498  Sanicula graveolens L. R. Heckard 1972-7-10 3116 Colusa near Trout Creek crossing of trail to Box Springs (Snow Mountain); Snow Mountain 1828 Comment
  UCD163232  Sanicula tuberosa Craig D. Thomsen 2001-4-12 2437 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection (about 1/8 mile east of vista point). 345 Comment
  UCD57338  Sanicula tuberosa Robin Testa 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  UCD82528  Sanicula tuberosa Craig Thomsen; G. Harrington 2009-5-12 2884 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCD82861  Sanicula tuberosa Gordon Harrington 2008-4-13 72 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  UCD67087  Schoenoplectus acutus var. occidentalis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5109 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  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
  CAS-BOT-BC7623  Schoenoplectus americanus A. A. Heller 1916-6-9 12390 Colusa Coast Range about 8 miles west of Williams in the blue oak belt. Comment
  POM185714  Schoenoplectus maritimus Roxana Stinchfield 1916-7-11 467 Colusa Davis Tule, near Sycamore Slough. Comment
  UCD49961  Schoenoplectus mucronatus June McCaskill 1954-8-9 359 Colusa Ca. 2 miles E of Princeton and 300 yards S of Glenn County line. Comment
  UCD55471  Schoenoplectus pungens var. longispicatus Ellen Dean; Gordon Harrington 2006-10-6 3295 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
  CDA417  Scirpus glaucus Kingwill 1929-8-23 Colusa 0 Comment
  UC1100902  Scirpus maritimus Malcolm A. Nobs, S. Galen Smith 1949-9-9 1872 Colusa rice fields 3 mi w Williams; w of Williams Comment
  JEPS21848  Scribneria bolanderi John R. Swanson 1958-4-26 308 Colusa 1.4 mi w of Bear Valley (on road toward Bartlett Springs) 609 Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  CHSC75613  Scutellaria californica Vernon H. Oswald; Lowell Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area. 975 Comment
  JEPS73453  Scutellaria californica L. R. Heckard 1972-7-8 3053 Colusa on n side of ridge running se of Snow Mountain (West Peak); West Peak 2011 Comment
  JEPS80801  Scutellaria californica L. R. Heckard and J. C. Hickman 1981-7-30 5772 Colusa heading up East Ridge of Snow Mountain, West Peak 1950 Comment
  UCR225654  Scutellaria californica Craig D. Thomsen, Gordon Harrington 2008-7-6 2770 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  SBBG6519  Scutellaria siphocampyloides H. and M. Dearing 1939-5-12 3342 Colusa near Leesville 457 Comment
  UCD57835  Scutellaria siphocampyloides Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 39 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (going roughly west) from Road Kill Cafe, about 1/2 mile upstream from the breached dam. 398 Comment
  CHSC79519  Scutellaria tuberosa B. Castro; L. P. Janeway 2000-5-2 1108 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  SFV10451  Scutellaria tuberosa M. L. Vincent 1968-6-8 779 Colusa Goat Mountain Road, 1 mile from Stanford turnoff. Comment
  RSA114112  Sedella pentandra H. L. Mason 1953-5-4 s.n. Colusa Little Stony Creek Road 0.25 miles above junction of Little Stony Creek and Trout Creek, Inner North Coast Ranges. 610 Comment
  UCD82734  Senecio aronicoides Craig Thomsen; G. Harrington 2009-5-14 2915 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  RSA201801  Senecio eurycephalus J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, 8.6 miles (by Bear Valley Road) northwest of junction with State Highway 20. 396 Comment
  CDA11923  Senecio greenei G. F. Hrusa 1989-5-7 6078 Colusa North Coast Biodiversity Arena; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  CHSC101592  Senecio sylvaticus David W. Isle 2002-4-18 1660 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trailhead. MDB and M. 524 Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  SEINET3876301 Image available Sequoia sempervirens James H. Smith 1976-1 s.n. Colusa Williams.; 0 Comment
  HSC101845  Setaria parviflora J. P. Smith, J. O. Sawyer 2007-9-2 12411 Colusa River Rd. N of Colusa 20 Comment
  CHSC94412  Setaria viridis Lowell Ahart 2006-8-9 13137 B Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD92837  Setaria viridis Beecher Crampton 1958-6-26 4974 Colusa along Grieve Road, 5.5 miles south of College City. Comment
  JEPS120911  Sidalcea diploscypha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18647 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
  UC71652  Sidalcea diploscypha Miss Alice King 1905-1 Colusa College City Comment
  UCD14553  Sidalcea diploscypha John M. Tucker 1980-5-3 4443 Colusa California, Colusa Co.; Bear Valley, 4.3 mi. south of junction of Brim Road and Bear Valley Road; 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
  CHSC110124  Sidalcea keckii L. P. Janeway 2011-5-11 10279 Colusa Inner North Coast Ranges. Southeast side of East Park Reservoir, recreation and camping area; 1.4 km north of Sites-Lodoga Road. 373 Comment
  JEPS105737  Sidalcea keckii David Gowen 2004-5-18 84 Colusa About 1.5 miles south of Stonyford. Road shoulder on the east side. Comment
  JEPS50071  Sidalcea keckii W. L. Jepson 1932-5-7 16260 Colusa valley 2 mi above Venado (w Colusa Co.); Venado (valley 2 mi above) 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
  JEPS80800  Sidalcea oregana subsp. hydrophila L. R. Heckard and J. C. Hickman 1981-7-30 5770 Colusa along Trout Creek (se side of Snow Mt.); , along Trout Creek 1600 Comment
  CDA15466  Silene californica G. F. Hrusa, WTD 1998-6-19 14603 Colusa North Coast Ranges; Upper Little Stony Creek. Goat Mtn. Rd. ~ 2 km. W of campground. Comment
  SD72209  Silene californica Eugene Memmler 1969-5-8 102 Colusa Valley side of coastal hills between Williams and Clear Lake, Highway 20. 149 Comment
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
Read comments
Aug 11 2014
  SEINET8879658  Silene laciniata subsp. californica R. R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road, ca 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  UCD163877  Silene lemmonii Craig D. Thomsen 2000-4-12 2525 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  CAS-BOT-BC389256  Silene lemmonii Volney Rattan 1884-6-1 s.n. Colusa Summit above Fouts Sp. Coast Mts. North of San Francisco Bay Comment
  CHSC32220  Silene verecunda James Jokerst 1980-8-6 1053 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  CHSC110364  Sinapis arvensis Richard R. Halse 2010-3-20 7826 Colusa Along State Hwy 20 ca. 5.4 miles wwest of Colusa (junction of State Hwys 20 and 45). 17 Comment
  UCD72467  Sinapis arvensis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3801 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  UCD61438  Sisymbrium altissimum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCD63623  Sisymbrium altissimum Craig D. Thomsen 2008-3-21 2720 Colusa BLM Payne Ranch. 0.25 mile south of intersection of Hwy 16 and Hwy 20. Between Bear Creek and Hwy 16. Comment
  UCD81234  Sisymbrium irio Ellen Dean; K. Mawdsley and B. Rice 2009-5-6 5571 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Along Bear Creek south of Brophy Canyon, near old access road that leaves Hwy. 16 near milepost 6. 218 Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  CHSC115383  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 Colusa Burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  HSC31314  Sisyrinchium bellum Carter Schleicher 1974-5-4 27 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  RSA0115083  Sisyrinchium bellum Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18644 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  HSC59568  Sisyrinchium bellum Rick Lundquist 1979-4-14 22 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  CHSC114061  Solanum parishii Richard R. Halse 2012-3-29 8456 Colusa Along State Hwy. 20 ca. 6.8 miles northeast of its junction with State Hwy16 176 Comment
  CHSC28810  Solanum parishii Laraine Roothoff 1979-3-31 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC41848  Solanum parishii N. G. Sugihara 1977-4-24 38 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 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
  NY723192  Solanum rostratum L. Ahart 1980-6-11 2370 Colusa 9¼ miles north of Colusa 35 Comment
  CAS-BOT-BC35921  Solanum umbelliferum Roxana S. Ferris 1926-4-23 6591 Colusa Near Stonyford. Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  CDA15549  Solidago californica G. F. Hrusa 1998-10-28 14900 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  RSA695736  Solidago canadensis subsp. elongata D. W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles west from junction Lagoda-Stonyford Road. 427 Comment
  CHSC117781  Solidago velutina subsp. sparsiflora David Isle; Terril Wolt 2016-7-15 2168 Colusa North Coast Range:~5 1/2 miles W of Stonyford off S side Fouts Springs Rd M10 (18N01.2). Also ~5/8 mile SE of M10 Jct. w/ Trough Sp R Rd M5 (18N07.1) Fouts Spring California. 609 Comment
  SACT002290  Sorghum halepense Herbert Mason 1945-9-19 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River , 1 mile north of Colusa. Comment
  UC1100454  Sorghum halepense Herbert L. Mason 1945-9-10 12723 Colusa 1 mi. n. Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Sacramento R. Comment
  UCR201571  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-10-14 14268 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  CAS-BOT-BC390100  Spergularia bocconi A. A. Heller 1916-6-9 12392 Colusa Along the state highway near Colusa Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  CHSC29847  Spergularia macrotheca var. leucantha K. R. Stern 1980-6-30 6658 Colusa Vernal pool area, south border Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC390759  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 636 Colusa 2 mi. so. of Maxwell Comment
  CAS-BOT-BC390761  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 640 Colusa 3 3/4 mi. south of Maxwell Comment
  CAS-BOT-BC390764  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  CAS-BOT-BC390765  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 636 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
  CHSC95011  Stachys ajugoides var. rigida Lowell Ahart 2006-10-31 13539 Colusa On the south side of road M 10, about 6 miles by road west of Stonyford. 583 Comment
  JEPS104386  Stachys albens Lowell Ahart 2003-7-14 10381 -A Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  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
  SEINET3450931  Stachys albens Unknown 2003-7-14 10381 A Colusa Williams, Williams, about 21 road miles southwest, south side of highway 20, about 2 miles southwest of the intersection of highway 20 and Bear Valley Road 520 Comment
  UCD70231  Stachys albens D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley Road. Bear Valley Creek. 370 Comment
  JEPS120802  Stachys rigida var. rigida Lowell Ahart 2013-10-1 19080 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
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  JEPS80121  Stellaria calycantha L. R. Heckard with J. Hickman 1980-7-1 5277 Colusa ca 10 mi w Stonyford (Snow Mt., cirque between East and West Peaks); Snow Mt. 2042 Comment
  UCR212364  Stellaria media Craig D. Thomsen 2000-3-31 2074 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CHSC86516  Stellaria nitens B. Castro 2003-3-17 1382 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  CHSC94466  Stellaria pallida Lowell Ahart 2006-8-9 13165 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80756  Stephanomeria lactucina L. R. Heckard and J. C. Hickman 1981-7-29 5723 Colusa spur about 1 km se Summit Springs (s side of Snow Mt.); Snow Mt. 1554 Comment
  CHSC79695  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner Coast Ranges. Along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  UCD167948  Streptanthus James Neilson 1982-7-1 4088 Colusa near mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  CHSC27624  Streptanthus breweri Robert Schlising; Timothy Spira 1978-5-13 3245 Colusa Ca 0.5 mi NW jct Hwy 20 and Bear Valley (= Wilbur Springs) Road, along latter. Comment
  UCD164316  Streptanthus breweri Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 545440 4334598. [UTM coordinates place this location on east side of Walker Ridge along Bartlett Springs Road.] Comment
  UCD66953  Streptanthus breweri Ellen Dean; Davis Botanical Society 2008-5-31 4997 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD70220  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine annual grasslands in serpentine chaparral edges. 370 Comment
  CAS-BOT-BC61234  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  HSC62796  Streptanthus breweri M. A. Ericksen 1979-4-14 207 Colusa Adjacent to Bear Valley Rd., 3.9 mi. from Hwy. 20 Comment
  SEINET11993713  Streptanthus breweri Unknown 1985-1 50459 Colusa W of Williams, Bear Valley, on Bear Valley Rd about 1 mi from its origina at Rt. 20 366 Comment
  UC1292771  Streptanthus breweri Freed W. Hoffman 2784 Colusa N of road from Leesville to Bartlett Springs, along the summit between Colusa and Lake counties Comment
  UC1051749  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-17 4251 Colusa above Wilbur Springs; Inner North Coast Ranges, Wide Awake Mercury Mine 462 Comment
  UC956515  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 Comment
  UCD57303  Streptanthus breweri var. breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3674 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  UCD66907  Streptanthus breweri var. breweri Jack Alderson 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the WNW of Cowboy Camp on the west side of Bear Creek. 427 Comment
  SEINET11993369  Streptanthus breweri var. hesperidis Unknown 1985-1 50460 Colusa Walker Ridge, Brim Rd nr intersection W Walker Ridge Rd Comment
  HSC45730  Streptanthus glandulosus M. Alcasas 1978-4-22 41 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA293147  Streptanthus glandulosus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UC1552823  Streptanthus glandulosus subsp. glandulosus Frederica Bowcutt 1985-5-10 513 Colusa about 3 mi se Wilbur Springs (1 mi w of Hwy 20, base of steep s-facing hillsides); Wilbur Springs 15' Quad, Big Valley Shale Barrens Comment
  CAS-BOT-BC87396  Streptanthus morrisonii G. L. Stebbins 1966-6-6 6431 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stonyford. 609 Comment
  UCD164318  Streptanthus morrisonii Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 538344, 4348715. [UTM coordinates place this location on the south side of Little Stoney Creek, west of Lodoga.] 588 Comment
  UCD167946  Streptanthus morrisonii James Neilson 1982-7-1 4089 Colusa About 6 miles west of Lodoga, about 1 mile south of mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  RSA388855  Styrax redivivus Clinton C. Shock 1980-5-3 68 Colusa 2 miles W of base of Bear Valley, 14.6 miles north of State Hwy 20. East of Walker Ridge. 488 Comment
  SBBG83456  Styrax redivivus C. C. Shock 1980-5-3 68 Colusa 2 mi W of base of Bear Valley, 14.6 mi N of St Hwy 20, E of Walker Ridge 487 Comment
  UCD119091  Styrax redivivus Tom Aldrich 1975-5-25 17 Colusa 2.3 miles west of Leesville Grade, Wilbur Springs Road junction, toward Walker Ridge. Comment
  UCD119113  Styrax redivivus D. Sanchez-Mata; P. Rodriguez-Rojo 1997-7-25 s.n. Colusa Williams (c. 15 miles West). Blue Ridge near Bear Creek. 350 Comment
  CHSC29751  Suaeda nigra K. R. Stern 1980-6-30 6653 Colusa Vernal pool, south central border of Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC97650  Symphyotrichum chilense Milo S. Baker 1946-9-4 11618 Colusa Butte Sink, near locked gate of Colusa Gun Club Comment
  JEPS80880  Symphyotrichum spathulatum L. R. Heckard and J. C. Hickman 1981-7-31 5801 Colusa Dark Hollow Creek, (e side of Snow Mt.) Snow Mt. 1645 Comment
  UC71764  Symphyotrichum spathulatum H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC71775  Symphyotrichum spathulatum H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS24496  Symphyotrichum subulatum J. H. Thomas 1960-8-30 8864 Colusa 5 mi nw, along road to Sycamore College City Comment
  CAS-BOT-BC99395  Symphyotrichum subulatum var. parviflorum J. H. Thomas 1960-8-30 8864 Colusa About 5 miles northwest of College City along road to Sycamore Comment
  CAS-BOT-BC99394  Symphyotrichum subulatum var. parviflorum A. A. Heller 1939-10-1 15484 Colusa places between Williams and Maxwell Comment
  JEPS81289  Taeniatherum caput-medusae L. R. Heckard and J. C. Hickman 1982-7-5 5900 Colusa Summit Springs, s side of Snow Mountain Summit Springs; Snow Mountain, Summit Springs 1500 Comment
  UCD86110  Taeniatherum caput-medusae Beecher Crampton 1958-5-19 4788 Colusa 8.5 miles east (probably west) of Williams, just off of Highway 20. Comment
  HSC41184  Tamarix parviflora Robert M. Specht, John Rehling 1976-4-12 383 Colusa 7.5 mi. S of Hwy. 20 on Hwy. 16 Comment
  HSC62945  Tamarix parviflora Marla J. Carollo 1979-4-14 29 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  RSA296726  Tamarix parviflora Michael Dalke 1979-4-14 51 Colusa Bear Valley Road, 3.9 miles N of State Route 20. 412 Comment
  UCD57549  Tamarix parviflora Cindy Yip; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  CHSC77944  Tetrapteron graciliflorum Beth Hendrickson; B. Castro, L. P. Janeway, Mary Ann Griggs 1999-4-12 Colusa Vicinity of Logan Ridge and Golden Gate. 158 Comment
  UCD163682  Tetrapteron graciliflorum Craig Thomsen 1999-4-15 1983 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD163838  Tetrapteron graciliflorum Craig D. Thomsen 2001-4-12 2467 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD71258  Tetrapteron graciliflorum James I. MOSBY 1984-4-21 6 Colusa Bear Valley, 10 miles north on Bear Valley Road; on moist clay soil; not very abundent. 426 Comment
  CAS-BOT-BC240289  Thalictrum fendleri Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2730 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD81708  Thalictrum fendleri var. polycarpum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5715 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCD82585  Thalictrum fendleri var. polycarpum Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2730 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1 mi E of Walker Ridge Rd. 609 Comment
  CAS-BOT-BC399735  Thalictrum polycarpum A. F. Hough 1924-6-22 1 Colusa McDaniel Ranger Station 914 Comment
  UCR47922  Thelypodium flavescens Walter C. Overton 1980-4-14 s.n. Colusa Side canyon on road into Bear Valley, c. 1 mi. north of junction of State Hwys 16 and 20. Comment
  UCD163237  Thinopyrum intermedium Craig D. Thomsen 2000-6-23 2422 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
  HSC66006  Thysanocarpus curvipes Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 41 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  HSC72161  Thysanocarpus curvipes J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9536 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SEINET3166341  Thysanocarpus curvipes subsp. curvipes P. J. Alexander, C. D. Bailey 2009-4-1 973 Colusa East slope of the North Coast Ranges, Mendocino National Forest, east side of Mill Creek 0.8 miles SSW of its confluence with South Fork Stony Creek, 6.3 miles WSW of Stonyford. 509 Comment
  CHSC62927  Thysanocarpus curvipes var. curvipes Vernon H. Oswald; Lowell Ahart 1994-4-6 6064 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On the slopes bordering Sullivan Creek. 469 Comment
  CHSC60076  Thysanocarpus laciniatus Jana Burgess 1987-4-4 13 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi. wsw of Williams. 143 Comment
  SEINET5731492 Image available Thysanocarpus radians Frank Polach 1967-1 20 Colusa Bear Valley; Bear Valley 402 Comment
  UC72283  Tofieldia occidentalis subsp. occidentalis Milo S. Baker 1898-8-22 552 Colusa along a stream Bear Valley Mountains Comment
  CHSC62946  Tonella tenella Vernon H. Oswald; Lowell Ahart 1994-4-6 6068 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  UCD41197  Torilis nodosa James Salyards 1986-5-17 86 - Colusa Along Maxwell-Sites Road, 0.95 mi. east of Sites. Comment
  CAS-BOT-BC234976  Torreya californica Ellen Dean; G. Harrington; K. Mawdsley; J. Shepard 2010-5-1 5950 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
  UCD93191  Torreyochloa pallida var. pauciflora Freed W. Hoffman 1948-6-28 2504 Colusa Lower Letts Valley, western part of county. Comment
  CHSC31359  Toxicoscordion fremontii P. Lynn Lester 1980-3-31 13 Colusa Ca. 10 yds sw of Mendocino Nat. Forest Rd 5, ca. 0.5 mi sw of jct with Mend. Nat. For. Rd 10 (Fouts Spring Rd, Rd 43), ca. 6 mi wsw of Stonyford. 762 Comment
  UCD139848  Toxicoscordion fremontii G. Robinson 1984-4-21 2 Colusa Bear Valley; west of Wilbur Springs Road, 3.2 miles north of Highway 20, east of a creek, along a fence. 390 Comment
  UCD139884  Toxicoscordion venenosum var. venenosum W. K. Sutton 1931-2-26 2176 Colusa Maxwell. Comment
  UCR55863  Trichocoronis wrightii J. M. Tucker 1953-8-28 2675 Colusa rice field 7 mi east of Arbuckle Comment
  JEPS104227  Trichostema laxum Lowell Ahart 2003-7-14 10381 Colusa Along a drainage, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  UC725735  Trichostema laxum A. A. Heller 1941-9-22 Colusa just E of Lake County line Comment
  UCSC005368  Trifolium Randall Morgan 1995-5-16 2628 Colusa Bear Valley Comment
  UCSC006007  Trifolium Randall Morgan 1996-5-8 2922 Colusa Seed from Bear Valley Comment
  HSC72139  Trifolium albopurpureum J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9571 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  POM20227  Trifolium albopurpureum Roxana S. Ferris 1917-4-12 53 .9 Colusa 4 miles east of Williams. Comment
  UCD81253  Trifolium albopurpureum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5418 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located to the south of Brophy Canyon and north of the road leading up from the confluence of Bear and Cache Creeks. 365 Comment
  UCSC010480  Trifolium albopurpureum Dylan M. Neubauer, Tim Forsell 2016-3-30 590 Colusa (NCoRI) Bear Valley, Bear Valley Road, 0.67 air miles south-southeast of junction with Wilbur Springs Road 381 Comment
  SFV121337  Trifolium albopurpureum J. M. Tucker, D. Dreyfus 1967-4-29 4036 Colusa South end of Bear Valley, 6.3 miles north of junction of Bear Valley Road with State Highway 20. 427 Comment
  UC1049532  Trifolium albopurpureum var. albopurpureum Rimo Bacigalupi 1950-4-16 3113 Colusa 4 mi s Ladoga (6 mi n of Leesville, along Little Indian Creek); Inner North Coast Ranges, eastern base, Indian Valley Comment
  CHSC36148  Trifolium albopurpureum var. dichotomum Charmaine Rust 1980-4-17 12 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 165, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC118881  Trifolium angustifolium David Isle 2017-5-12 2170 Colusa Foothills E Edge N Coast Range:~0.7 mile SW of (downtown) Stonyford General Store; Between Handlebar Ranch Firebreak and N-S fenceline, just W of Isle property. 371 Comment
  CHSC112232  Trifolium bifidum Lowell Ahart 2013-5-1 18662 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC115392  Trifolium bifidum var. bifidum Lowell Ahart 2015-4-10 20009 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. 500 Comment
  UC80312  Trifolium bifidum var. bifidum Katharine Brandegee Apr 1889 Colusa Colusa County Comment
  CHSC107963  Trifolium depauperatum var. amplectens B. Castro; T. Boullion 2011-4-20 1840 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. In grassy vernally moist swale which just north of large +- saline/alkaline wetland/marsh, in small vernal pool. 49 Comment
  CHSC27812  Trifolium depauperatum var. depauperatum Jan M. Karaz 1978-4-9 8 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, 18 mi sw of Williams. 321 Comment
  JEPS89584  Trifolium depauperatum var. truncatum Dean W. Taylor 1992-4-16 12407 Colusa stony hillside ca. 0.4 mi. due w. from spillway into Little Stony Creek (East Park Reservoir); Inner N. Coast Range, Gilmore Peak Quad. 411 Comment
  RSA590142  Trifolium depauperatum var. truncatum Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7289 Colusa Along Bear Valley Rd., 2.5 mi. N jct. Wilbur Springs Rd. Comment
  UCD35562  Trifolium dichotomum Beecher Crampton 1958-4-21 4736 Colusa 13.8 miles NW of Rumsey, along State Highway 16. Comment
  CHSC59540  Trifolium fucatum Roberta Walker 1992-4-4 9 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
  JEPS98411  Trifolium fucatum Vernon H. Oswald 2000-3-27 9901 B Colusa ca. 2 mi S of Stonyford (Lodoga-Stonyford Road) 381 Comment
  UCD15420  Trifolium fucatum Margit Sands 1985-4-13 22 Colusa In Bear Valley, 3.8 miles north of Wilbur Hot Springs Road. 390 Comment
  SEINET12161438  Trifolium fucatum S. M. Leary 1978-1 4 Colusa ca .3 mi W of Jct of Hwys 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams. Wilbur >> 322 Comment
  UCD35784  Trifolium fucatum Beecher Crampton 1962-4-17 6221 Colusa 3.3 miles north of College City. Comment
  UC80532  Trifolium gracilentum Katharine Brandegee Apr 1889 Colusa Leesville Comment
  UCD63738  Trifolium hirtum Craig D. Thomsen 2008-5-23 2744 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 415 Comment
  UCD64277  Trifolium hirtum Craig D. Thomsen 2000-3-31 2076 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR206382  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2009-5-20 14754 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC77931  Trifolium obtusiflorum Jean Witzman; Beth Hendrickson 1999-5-6 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sulphur Gap. 137 Comment
  JEPS110476  Trifolium obtusiflorum Lowell Ahart 2006-8-9 13130 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS121122  Trifolium obtusiflorum Lowell Ahart 2013-5-1 18679 Colusa On the N side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  RSA0118786  Trifolium obtusiflorum Lowell A. Ahart 2013-5-1 18679 Colusa On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  SBBG119886  Trifolium obtusiflorum L. Ahart 2006-8-9 13130 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  UCD80899  Trifolium subterraneum Ellen Dean; w/ Destanella Flat Tour 2009-3-28 5299 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Destanella Flat, just E of the Lake County border, ca. 3.4 road miles west of Hwy 16 along Hwy 20, south side of Hwy 20. 560 Comment
  CHSC94405  Trifolium variegatum Lowell Ahart 2006-8-9 13131 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  HSC47741  Trifolium variegatum Thomas W. Nelson, Jane P. Nelson 1978-4-29 3946 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS82351  Trifolium variegatum var. variegatum L. R. Heckard 1969-5-28 2234 Colusa ca 6 air mi w Stonyford (along Stony Creek); Four Springs Comment
  UCSC005823  Trifolium willdenovii Randall Morgan 1996-5-24 2970 Colusa Bear Valley Comment
  CHSC112003  Trifolium wormskioldii David Isle; David Toren 2003-6-24 2127 Colusa Veratrum spring and mdw 1/4 mi E of Goat Mtn Rd 16N03 jct w/Horse Glade rd. 1670 Comment
  UCD148048  Trillium chloropetalum Greg Kareofelas 2014-4-12 s.n. Colusa Mendocino National Forest: Mill Valley Campground. 1228 Comment
  UCD58100  Triphysaria eriantha Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3477 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  UCR212332  Triphysaria eriantha Craig D. Thomsen 2000-3-31 2057 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS80812  Trisetum canescens L. R. Heckard and J. C. Hickman 1981-7-31 5785 Colusa n side of rocky promontory called Fouts Springs Overlook (e side of Snow Mt.); Snow Mt. 1783 Comment
  HSC85828  Triteleia laxa Jeff Dunk, Tallchief Comet, David Munger 1987-4-11 63 Colusa Bartlett Springs Rd. Comment
  SEINET3127298  Triteleia laxa M. A. King 1905-1 sn Colusa Near Arbuckle [hand written], collected near College City, Sacramento Valley [printed label Comment
  UCD14274  Triteleia laxa Gregory Sutton 1974-5-4 78 Colusa Colusa County; along Highway 20, 8 miles west of Williams. 91 Comment
  SEINET3243503  Triteleia peduncularis Helen K. Sharsmith 1953-1 4274 Colusa East slope of Snow Mountain on Bonny Doon road, Mendocino National Forest. 671 Comment
  CAS-BOT-BC67364  Tropidocarpum gracile Roxana S. Ferris 1917-4-12 537 Colusa 4 miles east of Williams. Comment
  CHSC90201  Tropidocarpum gracile A. Francis 1989-4-1 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  JEPS118683  Tropidocarpum gracile David Isle, Ronda Isle 2009-4-1 1910 Colusa W of Isle barn & field adj garden fence. 2253 Dennis Dr, Stonyford. Gilmore Peak 7.5' quad. Comment
  UCD163866  Typha angustifolia Craig D. Thomsen 2001-5-31 2554 Colusa Bear Creek Canyon, south of Bear Valley. About 4 miles north of Hwy 20. Comment
  CHSC94390  Typha domingensis Lowell Ahart 2006-8-22 13208 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD55448  Typha domingensis Ellen Dean; Gordon Harrington 2006-10-6 3273 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
  UCD83752  Umbellularia californica Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5949 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
  CHSC115397  Uropappus lindleyi Lowell Ahart 2015-4-1 19997 Colusa Inner North Coast Range. On the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. 520 Comment
  CHSC89856  Uropappus lindleyi B. Castro; L. P. Janeway 2001-4-18 1237 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On edges of low terrace just above riparian corridor paralleling dirt road, adjacent to perennial N-S-trending creek. 268 Comment
  UCD163328  Uropappus lindleyi Craig D. Thomsen 2009-5-3 2794 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD82163  Uropappus lindleyi Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5695 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CHSC94983  Urtica dioica subsp. gracilis Lowell Ahart 2006-10-31 13535 Colusa West of a small stream, Big Springs, on the south side of Letts Lake, about 13 miles (air) southwest of Stonyford. 1529 Comment
  UCR206690  Urtica urens George K. Helmkamp, E. A. Helmkamp 2009-1-31 14324 Colusa Sacramento Valley, along CA-20, 1.6 miles west of the Sacramento River at border with Sutter Co. 9 Comment
  UC76664  Valerianella locusta Peter Ossenbruggen 1905-1 Colusa near Grimes (Sacramento Valley); Sacramento Valley Comment
  CAS-BOT-BC479711  Velezia rigida Ann Howald 2003-5-29 2352 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.7 mi N of Lodoga, near Chisolm Cove Group Campground 378 Comment
  JEPS81319  Verbascum blattaria L. R. Heckard and J. C. Hickman 1982-7-6 5934 Colusa s side Snow Mt. (slope above and e of Summit Springs); s side Snow Mt., e of Summit Springs 1584 Comment
  CHSC113036  Verbascum thapsus Lowell Ahart 2013-10-1 19093 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
  POM63857  Verbena lasiostachys Roxana Stinchfield 1916-7-8 375 Colusa Stinchfield Ranch, along Sycamore Slough Comment
  UCD169983  Verbena lasiostachys G. F. Hrusa; Dmitri Geltman 1999-8-18 15250 Colusa Goat Mtn. summit. 1706 Comment
  CDA14291  Verbena lasiostachys var. lasiostachys G. F. Hrusa 1998-6-19 14639 Colusa North Coast Ranges; Where Candy Bucket Spring crosses Fouts Springs - Stonyford Rd. ~ 4.5 mi. E of Stonyford. Comment
  CHSC113134  Verbena lasiostachys var. scabrida Lowell Ahart 2013-10-1 19091 A Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  SEINET10743598  Verbena lasiostachys var. scabrida Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 913 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
  UCR205142  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14247 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  RSA794841  Veronica anagallis-aquatica D. Isle 2008-4-17 1935 Colusa 5 miles north of Maxwell; south of Delevan Road; 0.6 miles west of I-5 Overpass; in irrigation ditch water on west side of 10 rice checks on Ruesser Moore property. 30 Comment
  CHSC110846  Veronica catenata David Isle 1989-5-14 1998 Colusa Stony Creek Watershed. Pendell Ranch--2 miles W of CO. Rd. 306 Jct. w/Fouts Springs Road; In black adobe soil--150 yds south of Pendell home. 384 Comment
  CHSC94481  Veronica catenata Lowell Ahart 2006-8-9 13127 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725015  Veronica catenata L. Ahart 2006-8-9 13127 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC115625  Veronica catenata D. Isle; Rhonda Isle 2014-9-27 2142 Colusa Northern Sacramento Valley Foothills: W side East Park Resservoir, 0.3 mi S of boatlaunch, 100 yds E of normal lake edge in muddy clay soil. 10S-0541629E, 435525N. 354 Comment
  JEPS16487  Veronica peregrina subsp. xalapensis W. L. Jepson 1934-5-3 16599 Colusa n of Colusa (Stegeman Station); Stegeman Station Comment
  UCD18840  Veronica peregrina subsp. xalapensis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 147 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCD67078  Veronica peregrina subsp. xalapensis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5102 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  JEPS80120  Veronica serpyllifolia subsp. humifusa L. R. Heckard with J. Hickman 1980-7-1 5276 Colusa 10 mi w of Stonyford (Cirque between East and West Peaks of Snow Mountain); Snow Mountain 2042 Comment
  UCD67034  Vicia americana Ellen Dean; Davis Botanical Society 2008-5-31 5015 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  CHSC80384  Vicia benghalensis Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  UCR233295  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17126 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CHSC86014  Vicia villosa subsp. villosa Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  UC1761574  Viola adunca Hoffman 1948-6-17 2618 Colusa Upper Letts Valley 1310 Comment
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May 8 2018
  UCD67122  Viola adunca subsp. adunca Ellen Dean; Davis Botanical Society 2008-5-31 5054 Colusa West of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs, east side of road. Comment
  CHSC57529  Viola douglasii Barbara Adams 1991-4-6 12 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
  HSC21779  Viola douglasii Charles Belshaw 1937-4-25 2820 Colusa North Coast Ranges: Cooks Springs Comment
  JEPS15269  Viola douglasii Rimo Bacigalupi with G. T. Robbins, G. L. Stebbins, C. McMillan, S. Galen Smith and Peter Kamb 1950-4-16 3115 Colusa 4 mi s of Ladoga (and 6 mi nnw of Leesville, along Little Indian Creek); Indian Valley, Little Indian Creek 396 Comment
  JEPS50291  Viola douglasii Alice King 1906-4-1 Colusa College City Comment
  JEPS73518  Viola douglasii L. R. Heckard 1972-7-10 3137 Colusa between Foutch Camp and Trout Creek crossing; Snow Mountain 1889 Comment
  RSA10951  Viola douglasii Victor Duran 1933-4-2 3379 Colusa Stonyford. 305 Comment
  UCD67093  Viola douglasii Ellen Dean; Davis Botanical Society 2008-5-31 5023 Colusa West of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCR261729  Viola douglasii Ann Howald 2003-3-26 2291 B 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
  SEINET5728583 Image available Viola douglasii Gene R. Williams 1961-1 31 Colusa Road to Bear Valley, 7.5 mi. N of jct. of State Hwys 16 and 20. Comment
  JEPS81336  Viola purpurea subsp. integrifolia L. R. Heckard and J. C. Hickman 1982-7-6 5950 Colusa s side of Snow Mountain, West Peak ridge Snow Mountain; , West Peak ridge 2103 Comment
  HSC72215  Viola purpurea subsp. quercetorum Thomas W. Nelson, Jane P. Nelson 1980-6-24 5873 Colusa Colusa-Lake County line, along trail to Snow Mtn., 0.5 mi. from trailhead 1616 Comment
  CAS-BOT-BC199948  Vulpia microstachys var. ciliata T. C. Fuller 1958-5-27 3671 Colusa S/Hwy 20, 1 mi. W/Jct. Hwy 16 Comment
  UCD56660  Vulpia microstachys var. ciliata Sam Bledsoe 2007-3-25 7 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. ca. 500 ft south of Hwy 20. 576 Comment
  UCD82505  Vulpia microstachys var. ciliata Craig Thomsen; G. Harrington 2009-5-12 2866 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UC766752  Vulpia microstachys var. confusa R. F. Hoover 1938-4-23 3208 Colusa Upper Sand Creek Comment
  CAS-BOT-BC183935  Vulpia microstachys var. microstachys Roxana S. Ferris 1926-4-23 6577 Colusa Stonyford Comment
  CDA33005  Vulpia microstachys var. pauciflora T. C. Fuller 1958-5-27 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  RSA783321  Vulpia myuros R. R. Halse 2011-3-20 8133 Colusa Williams. By junction of 5th Street and B Street. 25 Comment
  CAS-BOT-BC184669  Vulpia myuros subsp. megalura Roxana S. Ferris 1917-4-12 494 Colusa 4 miles East of Williams Comment
  CHSC107944  Vulpia myuros var. myuros B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1850 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
  CHSC79968  Wyethia glabra L. P. Janeway; B. Castro 2000-5-4 6708 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 274 Comment
  RSA589934  Wyethia glabra Michael A. Vincent, Robert M. Rhode 1996-3-30 7271 Colusa Along St Hwy 16, near mile marker 6/65, a little N of the Yolo Co. line; 6.65 mi S jct St Hwy 20. Comment
  UC36807  Xanthium spinosum J. Burtt Davy May, 1898 4277 Colusa near Willows Comment
  CDA11418  Yabea microcarpa G. F. Hrusa, K. van Katwyk 1995-4-22 12139 Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 m. N of Hwy 20. Comment
  JEPS87670  Yabea microcarpa Vernon H. Oswald and Lowell Ahart 1994-4-6 6063 Colusa 1.2 mi sw Digger Pine Flat (Goat Mtn Rd at Sullivan Creek, s of Stonyford); Sullivan Creek 469 Comment
  CDA38554  Yabea microcarpa Vernon H. Oswald & Lowell Ahart 1998-5-7 8993 Colusa Bartlett Springs Road 1.6 miles west of Bear Valley Road. Comment
  CHSC89288  Zeltnera trichantha G. F. Hrusa; Dmitri Geltman 1999-8-18 15243 Colusa North Coast Ranges. Along Leesville Rd., +- 1 mi S of Lodoga. Creekbed. 320 Comment
  UCD121476  Zeltnera trichantha Vernon H. Oswald; Lowell Ahart 1998-7-15 9267 B Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  RSA262383  Zigadenus fremontii Rosalie B. Lopopolo 1967-4-29 34 Colusa Ca. 8 miles northwest of junction of Highway 16 and Highway 20, Bear Valley 402 Comment



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