Search Results — 2000 specimen records retrieved (1630 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CDA25791  Abutilon theophrasti G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14263 Colusa Sacramento Valley; Along River Road (generally following the Sacramento River), 8.4 miles north of Colusa. Comment
  CAS-BOT-BC21712  Achillea millefolium J. Clausen 1939-6-26 1743 Colusa 17 miles west of Williams, just before entering Lake County Comment
  HSC45700  Achillea millefolium Sheila Logan 1978-4-22 62 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80192  Achnatherum lemmonii L. R. Heckard and J. Hickman 1980-7-3 5343 Colusa w of Summit Springs (sw of Snow Mt.; 10 mi w of Stonyford); Snow Mt., Summit Springs 1548 Comment
  SEINET223541 Image available Achnatherum lemmonii L. R. Heckard 1972-7-10 3135 Colusa West of Trout Creek Snow Mt. 1829 Comment
  CHSC92665  Achnatherum occidentale subsp. californicum D. Isle 2005-9-14 1175 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 1/2 mile SE of Box Spring Trail junction on Overlook Trail. 1895 Comment
  JEPS75746  Achnatherum occidentale subsp. californicum L. R. Heckard 1974-9-11 3945 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  HSC87056  Achyrachaena mollis P. A. Daly, Rudy Galindo 1988-4-17 56 Colusa 5.2 miles south of Bear Valley Road 390 Comment
  HSC92503  Achyrachaena mollis S. Morrissette, J. Williams & K. Kopper 1994-4-24 24 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  JEPS36738  Achyrachaena mollis W. L. Jepson 1932-5-8 16285 Colusa Stonyford 365 Comment
  POM163442  Achyrachaena mollis Roxana S. Ferris 1926-4-21 s.n. Colusa 3 mi W of Colusa.. Comment
  RSA424744  Achyrachaena mollis Aaron Liston, M. A. Blumler 1987-4-26 667 -10 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  SEINET7062980  Achyrachaena mollis A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 mile south of Route 20 and near Bear Creek. UTM Zone 10, 555654mE, 4318071mN. (WGS84/NAD83). 320 Comment
  HSC92504  Achyrachaena mollis J. Cromwell, Julie Schneider, A. Thoele 1994-4-23 45 Colusa Bear Valley, along Bear Valley Rd,. approx. 1.3 miles south of junction with Bartlett Springs Rd. 409 Comment
  CHSC77336  Acmispon americanus var. americanus Heidi West; Joyces Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CAS-BOT-BC479712  Acmispon brachycarpus Ann Howald 2003-6-9 2367 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3 mi N of Lodoga, N of Last Chance camping area 378 Comment
  CHSC112212  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 A Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC79733  Acmispon brachycarpus L. P. Janeway; B. Castro 2000-5-3 6699 Colusa Vicinity of Antelope Creek and Grapevine Creek. 426 Comment
  UCD163235  Acmispon brachycarpus Craig D. Thomsen 2000-4-28 2250 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC101628  Acmispon denticulatus David W. Isle; Teal Richards 2002-4-18 1653 Colusa Mendocino National Forest; N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg Study Plot. MDB and M. 524 Comment
  UCD66677  Acmispon denticulatus Craig D. Thomsen 2000-5-11 2290 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD67009  Acmispon denticulatus Craig D. Thomsen 2008-5-18 2736 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. Just south of Hwy 20, about 1 mile west of Hwy 16/20 intersection. Above perennial drainage. 365 Comment
  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
  CHSC52808  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 Comment
  OBI59416  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On rd above and W of Fouts Springs 762 Comment
  SBBG100086  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Trough Spring Ridge Rd, 0.2 mi N of its jct with Crackerbox Ridge Rd, ca. 6.5 air mi SE of Stonyford 1127 Comment
  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
  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
  UCR261740  Acmispon rubriflorus Ann Howald 2003-6-9 2364 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, just north of Eagle Eye camping area 377 Comment
  UCR261742  Acmispon rubriflorus Ann Howald 2003-6-9 2368 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Hole-in-the-Wall camping area 370 Comment
  HSC44246  Acmispon wrangelianus Barbara Kelly 1977-4-24 351 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  HSC98295  Acmispon wrangelianus D. R. Junell 1965-4-18 25 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  JEPS80827  Aconitum columbianum L. R. Heckard and J. C. Hickman 1981-7-31 5799 Colusa e. side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1645 Comment
  CAS-BOT-BC29713  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CHSC75739  Actaea rubra Vernon H. Oswald; Lowell Ahart 1999-6-22 9780 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at the Lily Pond. 1243 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
  UC217393  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains n. of town and e. of R.R. Hershey Comment
  CDA18841  Aeschynomene rudis R. Breckenridge 1999-7-1 PDR 909445 Colusa Rice field along Boggs Rd., in the vicinity of Princeton. 0 Comment
  CDA4021  Aeschynomene rudis June McCaskill, J. Hill 1990-8-27 s.n. Colusa Near Princeton. 0 Comment
  CDA4026  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4030  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
  UCD104589  Aeschynomene rudis June McCaskill; with Jim Hill 1990-8-27 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  UCD104591  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  HSC66736  Aesculus californica J. P. Smith, J. O. Sawyer 1973-4-30 6365 Colusa Along Hwy. 20, 10.1 mi. W of Hwy. 5 at Williams Comment
  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
  CHSC79649  Agoseris heterophylla L. P. Janeway; B. Castro 2000-5-2 6690 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  UC2014169  Agoseris heterophylla Ellen Dean, G. Harrington, K. Mawdsley 2007-3-30 3500 Colusa Colusa County: BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. Comment
  UCD64516  Agoseris heterophylla Craig D. Thomsen 2000-4-12 2102 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  UCD67033  Agoseris heterophylla Ellen Dean; Davis Botanical Society 2008-5-31 5014 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  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
  UCD82508  Agoseris heterophylla Craig Thomsen; G. Harrington 2009-5-12 2867 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 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
  UCD51793  Agrostis avenacea Beecher Crampton 1958-6-27 4985 Colusa 5 miles south of Colusa. Comment
  JEPS75878  Agrostis exarata L. R. Heckard 1974-9-10 3914 Colusa ne slope West Peak (Snow Mt); Snow Mt., West Peak 2072 Comment
  UCD162995  Aira caryophyllea Craig D. Thomsen 2000-4-12 2169 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66472  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD137914  Alisma lanceolatum Herbert L. Mason 1946-9-5 13119 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  UCD137975  Alisma triviale P. B. Kennedy 1925-9-18 s.n. Colusa Cortena, Rice Sta. 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
  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-BC459583  Allium amplectens Katherine Esau 1934-5-5 s.n. Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  CHSC84194  Allium amplectens Lowell Ahart 2003-7-14 10380 Colusa Along a very small drainage, 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
  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
  UC1299746  Allium amplectens Freed W. Hoffman 1948-6-27 2514 Colusa 8.6 mi sw Fouts Spring; North Coast Ranges, Upper Letts Valley Comment
  UCD163213  Allium amplectens Craig D. Thomsen 2000-4-28 2207 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  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
  CDA15775  Allium falcifolium G. F. Hrusa 1993-5-2 10852 Colusa North Coast Ranges; Frenzel Creek Research Natural Area - Mendocino National Forest. Lower Frenzel Creek, tributary of Little Stony Creek. Comment
  CHSC71009  Allium falcifolium Vernon Oswald; Lowell Ahart 1998-5-7 9009 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. 633 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-BC467305  Allium falcifolium A. Burgard; J. Goldsmith; J. Kalt 1996-5-4 71 Colusa 8.4 miles north of Indian Resevoir Rd. 57 miles east of Hwy. 101 on Hwy 20 701 Comment
  CAS-BOT-BC135887  Allium fimbriatum subsp. purdyi Peter H. Raven 1962-5-31 17908 Colusa State Highway 20, 2.5 miles east of Lake County line. Comment
  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
  CHSC32948  Allium fimbriatum var. purdyi Thomas Nelson; Jane Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  JEPS120995  Allium fimbriatum var. purdyi Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  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
  UCD141782  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. 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
  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
  SEINET3884502  Allium fimbriatum var. purdyi D. W. McNeal 1980-4-26 2318 Colusa On an open slope above Bear Valley Rd., 1.4 mi. n. of its jct. with Hwy #20.; 0 Comment
  UC725287  Allium fimbriatum var. purdyi A. A. Heller June, 1937 Colusa Lake Landing Comment
  SEINET194974  Allium purdyi A. A. Heller 1940-5-6 15579 Colusa Summit of the grade on State Highway # 20 , at the Lake County line, 232 Comment
  SEINET3878782  Allium sanbornii var. jepsonii James Payne Smith Jr 1978-4-22 9744 Colusa Wilbur Springs Quadrangle. Bear Valley Road, 1.2 miles from its junction with State Route 20.; 0 411 Comment
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  HSC66002  Allium serra Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 53 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  JEPS47562  Allium serra W. L. Jepson 1932-5-7 16262 Colusa valley 2 mi above Venado 304 Comment
  HSC90409  Allium serra Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 52 Colusa 1.7 mi. W of intersection between Walker Ridge Rd. and Bear Valley Rd. 415 Comment
  UCD141823  Allium serra L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa 1/2 mile east of Sites toward Maxwell. 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
  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
  CAS-BOT-BC230055  Allophyllum gilioides Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 853 Comment
  CHSC86527  Allophyllum gilioides subsp. violaceum B. Castro 2003-3-18 1387 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 228 Comment
  SEINET3872990  Allophyllum gilioides subsp. violaceum Richard R. Halse 2010-3-25 7849 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  JEPS73496  Alnus incana subsp. tenuifolia L. R. Heckard 1972-7-10 3112 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Springs (ca 10 mi w of Stonyford)) 1828 Comment
  JEPS75837  Alnus incana subsp. tenuifolia L. R. Heckard 1974-9-11 3942 Colusa e. Foutch Camp (near upper crossing of Trout Creek, Snow Mt.); Snow Mt. 1859 Comment
  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
  UCD110026  Alnus rhombifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 128 Comment
  CHSC71667  Alopecurus saccatus Michael A. Wolder 1998-5-12 Colusa Sacramento National Wildlife Refuge Complex. Colusa National Wildlife Refuge south west of Colusa. 16 Comment
  RSA198503  Alopecurus saccatus Roxana S. Ferris 1917-8-12 549 Colusa 4 miles east of Williams, alkali plains. Comment
  UCD55944  Alopecurus saccatus A. A. Beetle 1942-5-21 3276 Colusa 12 miles north of Williams. Comment
  UCR201546  Amaranthus blitoides George K. Helmkamp, E. A. Helmkamp 2008-10-14 14264 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  JEPS120702  Amaranthus californicus Lowell Ahart 2013-10-1 19089 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1191392  Amaranthus californicus Herbert L. Mason and Verne Grant 1946-8-6 12968 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  CAS-BOT-BC55588  Ambrosia psilostachya Roxana Stinchfield 1916-6-17 276 Colusa Cemetery, College City Comment
  CHSC61395  Ambrosia psilostachya Vernon H. Oswald; Joseph Silveira 1993-8-16 5804 Colusa Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. 24 Comment
  CHSC94986  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
  JEPS108783  Ambrosia psilostachya Lowell Ahart 2006-9-26 13350 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  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
  POM134394  Ammannia robusta Roxana Stinchfield 1916-7-17 288 Colusa At Tule Levee, College City Comment
  UC71658 Image available Amsinckia intermedia Miss Alice King 1905-1 Colusa College City; ; College City, Colusa Co. Comment
  HSC31598  Amsinckia intermedia Thomas E. Higley 1974-5-5 84 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  SEINET12519076  Amsinckia intermedia Christine Laning 1973-1 108 -14 Colusa 10.0 miles northwest of Rumsey on Route 16, near Yolo/Colusa county line. Comment
  CHSC117804  Amsinckia lunaris Jake Schweitzer 2010-4-1 Colusa Inner North Coast Rnages. On BLM parcel, approx. 265 m W of Walker Ridge Road (Bartlett Springs Rd on some maps) 120 m SE of Til Jones Spring. 853 Comment
  CHSC86529  Amsinckia lunaris B. Castro 2003-3-18 1384 a Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 Comment
  CHSC89610  Amsinckia lunaris B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1444 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 167 Comment
  SD237359  Amsinckia lunaris G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Ranges Foothills: along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek. 162 Comment
  UC1093626  Amsinckia lunaris Francia Chisaki, Gene B. Newcomb 1958-4-1 1097 Colusa on road to Lodoga (0.7 mi nw of junction with Hwy 20) Comment
  UCR206368  Amsinckia lunaris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 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
  UC76158  Amsinckia lycopsoides Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC89871  Amsinckia menziesii B. Castro; S. Innecken 2001-3-26 1219 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna, 85 Comment
  CHSC78593  Ancistrocarphus filagineus J. Marr; H. West, C. Warren, J. Lacey-Rickert, N. Wight 1998-4-14 Colusa Vicinity of Antelope Valley. 137 Comment
  CHSC79443  Ancistrocarphus filagineus B. Castro; L. P. Janeway 2000-5-3 1122 Colusa Vicinity of Sites, Huffmaster Rd, Antelope and Grapevine Creeks, just N of the divide between the two creeks. 414 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
  UCD56923  Ancistrocarphus filagineus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3526 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CHSC79806  Androsace elongata subsp. acuta L. P. Janeway; B. Castro 2000-5-2 6693 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  CHSC42572  Angelica tomentosa Vernon Oswald 1986-6-30 2178 Colusa Northwest side of Lily Pond near Letts Lake. 1188 Comment
  JEPS75850  Anisocarpus scabridus L. R. Heckard 1974-9-10 3900 Colusa se slope East Peak Snow Mt. 2103 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
  JEPS89936  Anthriscus caucalis Dean W. Taylor 1992-4-16 12399 Colusa on hillsides ca. 0.4 mi. due w. from spillway into Little Stony Creek East Park Reservoir; Inner N. Coast Ranges, Gilmore Peak Quad., East Park Reservo 411 Comment
  UCD83626  Anthriscus caucalis Adam Clause; with PLB 102 class 2010-5-2 5 Colusa Walker Ridge. Eaton Springs. 40 m south of the main road, on the flat valley floor at the edge of a creek. 709 Comment
  JEPS108810  Antirrhinum subcordatum Lowell Ahart 2006-6-11 12673 Colusa On the west side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UC726114  Antirrhinum subcordatum A. A. Heller 1940-6-7 15717 Colusa ridge e Lodogo Comment
  CHSC111700  Antirrhinum subcordatum David Isle; F. Thomas Griggs 1979-5-23 2064 Colusa Little Stony Creek Watershed. 1/5 mile W of Goat Mtn. Rd/Lodoga Rd. Jct. on N side of Goat Mtn. Rd. Near I-7 fire pre-attack triangular sign on T-post. (Just past Ruby King Mine and small eph. drainage that joins Little Stony Creek from N. 414 Comment
  CHSC84191  Antirrhinum vexillo-calyculatum subsp. intermedium Lowell Ahart 2003-7-14 10388 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  UCD66699  Antirrhinum vexillocalyculatum Craig D. Thomsen 2000-6-23 2406 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, near Colusa Co. milepost 3.00. 310 Comment
  UCD70221  Antirrhinum vexillocalyculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  RSA161328  Antirrhinum vexillocalyculatum subsp. breweri Peter H. Raven, Richard Snow 1959-9-11 14420 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 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
  POM129769  Apocynum cannabinum Roxana Stinchfield 1916-7-8 s.n. Colusa Stinchfield Ranch, along Sycamore Slough Comment
  SEINET8731045 Image available Apocynum cannabinum Helen K. Sharsmith 1953-1 4263 Colusa Raw serpentine, near confluence of North and Middle forks of Stoney Creek, Red Bride Camp, Mendocino National Forest 549 Comment
  CAS-BOT-BC392020  Aquilegia eximia G. L. Stebbins 1972-6-25 9000 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  JEPS73450  Aquilegia formosa L. R. Heckard 1972-7-8 3074 Colusa ridge running se Snow Mt., West Peak 1981 Comment
  CHSC28034  Arceuthobium campylopodum J. D. Jokerst 1979-3-24 180 Colusa Comment
  HSC96752  Arceuthobium campylopodum J. Carey, A. Hong, J. Leffingwell 1995-4-1 22 Colusa Walker Ridge Rd., 0.9 mi. NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek 793 Comment
  UCD63730  Arceuthobium campylopodum Craig D. Thomsen 2008-5-23 2739 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.75 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 520 Comment
  SEINET3239841  Arceuthobium occidentale R. L. Mathiasen 2009-1 2009 -21 Colusa 3.2 km E of Summit County line at vista point on St. Rte. 20. 400 Comment
  UCR225254B  Arceuthobium occidentale Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch, several hundred feet downslope of ridge trail, along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail Comment
  CHSC83138  Arctostaphylos G. L. Webster 1989-5-6 7700 Colusa Near border with Lake Co., on crest of Walker Ridge, near Cold Springs Mt. Comment
  HSC96816  Arctostaphylos canescens subsp. canescens J. Carey, A. Hong, J. Leffingwell 1995-4-1 24 Colusa Walker Ridge Rd., 4.8 mi. N of its junction with Indian Valley Access Rd. 976 Comment
  HSC92498  Arctostaphylos canescens subsp. sonomensis D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 9 Colusa On Walker Ridge Rd. 4.8 mi. N of junction with Indian Valley Access Rd. 976 Comment
  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
  UCD51019  Arctostaphylos glandulosa G. L. Webster 1989-5-6 7697 Colusa Near Border with Lake County; on Walker Ridge; near Cold Spring Mountain. Comment
  CAS-BOT-BC38981  Arctostaphylos malloryi P. C. Everett; E. K. Balls 1954-10-17 20335 Colusa 2 mi. SW of Trough Springs on road to Upper Lake from Stonyford Comment
  UCD72452  Arctostaphylos manzanita Ellen Dean; Gordon Harrington 2006-11-10 3313 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Along road between Roadkill Cafe and Cache Creek. 411 Comment
  SEINET11989688  Arctostaphylos manzanita R. A. DeMartile 1982-1 s.n. Colusa between Ladoga & Goat Mt. lookout 792 Comment
  HSC7627  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa Road between Upper and Lower Letts Valleys 1220 Comment
  CAS-BOT-BC24377  Arctostaphylos manzanita subsp. manzanita Roxana Stinchfield 1916-6-18 308 Colusa The Timber - near College City. Comment
  CAS-BOT-BC24380  Arctostaphylos manzanita subsp. manzanita Roxana S. Ferris 1926-4-23 6592 Colusa Near Stonyford. Comment
  RSA0010486  Arctostaphylos manzanita subsp. roofii Richard R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca.1.8 miles west northwest of its junction with State Hwy.20. 378 Comment
  SEINET11263262  Arctostaphylos manzanita subsp. roofii Richard R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  CDA15497  Arctostaphylos patula G. F. Hrusa, T. D. Wilfred 1998-6-19 14634 Colusa North Coast Ranges; Goat Mtn. around summit region. Comment
  CHSC22676  Arctostaphylos patula Robert A. Schlising; Glenn Keator 1962-1-31 2034 Colusa Coast Ranges. On Goat Mountain. 1097 Comment
  HSC67142  Arctostaphylos viscida J. P. Smith, Thomas W. Nelson 1976-4-14 8586 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 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
  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
  UCD56680  Arctostaphylos viscida subsp. pulchella Jack Alderson 2007-3-25 s.n. Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  UCD63712  Arctostaphylos viscida subsp. pulchella Craig D. Thomsen 2008-3-21 2721 Colusa BLM Payne Ranch. In narrow canyon just south of Hwy 20 (at Colusa Co. milepost 2.63), 0.5 mile west of intersection of Hwy 16 and Hwy 20. Comment
  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
  CDA11924  Argemone munita G. F. Hrusa 1989-5-7 6077 Colusa North Coast Biodiversity Arena; Cedar Mtn. Rd. along Little Stony Creek, approx. 4 miles above intersection with Stonyford-Lodoga Rd. Comment
  CHSC94476  Argemone munita subsp. munita Lowell Ahart 2006-8-9 13163 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC401742  Argemone munita subsp. rotundata L. Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station, Inner North Coast Ranges 548 Comment
  UC1051551  Argemone rotundata Helen K. Sharsmith 1953-6-21 4308 Colusa slopes of Little Stoney Creek 1 mi within boundary of Mendocino National Forest (Inner North Coast Ranges); Inner North Coast Ranges 670 Comment
  UCD56859  Aristida ternipes var. gentilis L. T. Burcham 1955-7-5 317 Colusa 10 miles west of Williams. 121 Comment
  CDA15478  Arnica discoidea G. F. Hrusa, WTD 1998-6-19 14615 Colusa North Coast Ranges; USFS Pacific Ridge Rd. (M5), +- 4-5 km. NW of inters. w/Colusa Co. Goat Mtn. Rd. Comment
  UC1585867  Arnica discoidea Barbara Ertter 1989-7-1 8594 Colusa 12 airmi wsw, (rd to Goat Mt Lookout 2.2 mi s of Rt M-10, head of S Fk Stony Cr Stonyford; South Fork Stony Creek 1500 Comment
  JEPS24499  Artemisia douglasiana J. H. Thomas 1960-8-30 8862 Colusa 2.5 mi nw of Sycamore (on road to Colusa) Comment
  HSC44456  Asclepias cordifolia R. York 1978-4-22 126 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  UCD121262  Asclepias cordifolia Jack Major 1966-6-6 s.n. Colusa At junction of Frenzel Creek with Stony Creek. 426 Comment
  POM129846  Asclepias fascicularis Roxana Stinchfield 1916-7-11 s.n. Colusa Davis Tule, near Sycamore Slough. Comment
  JEPS82548  Asclepias speciosa L. R. Heckard 1983-7-27 6111 Colusa slopes around Summit Springs (s flank of Snow Mt.); Snow Mt. Comment
  RSA724830  Aster subulatus var. ligulatus L. Ahart 2006-9-26 13343 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  CDA26624  Astragalus breweri T. C. Fuller 1958-4-17 Colusa 1 mile south of Lodoga. 0 Comment
  UCD82583  Astragalus breweri Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2728 Colusa Walker Ridge, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD104677  Astragalus clevelandii K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, U.S. #20. Comment
  CAS-BOT-BC178664  Astragalus clevelandii G. L. Stebbins 1972-6-25 8099 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  UC638665  Astragalus gambelianus Ethel Crum 1938-5-7 2017 Colusa 4.2 mi n Rumsey (Inner North Coast Range, summit of ridge); Inner North Coast Range, summit of ridge, n of Rumsey 254 Comment
  CHSC26305  Astragalus rattanii var. jepsonianus Pauleen Broyles 1977-4-16 119 Colusa Ca. .5 km w of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 316 Comment
  CHSC46306  Astragalus rattanii var. jepsonianus Vernon Oswald 1986-5-12 2006 Colusa Brim Rd. (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  HSC44108  Astragalus rattanii var. jepsonianus Barbara Kelly 1977-4-24 390 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
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Jul 31 2014
  JEPS21844  Astragalus rattanii var. jepsonianus John R. Swanson 1958-4-26 280 Colusa along roadside on Bear Valley - Lodoga road 6.6 mi s Barlett Springs junction; Bear Valley - Lodoga Road 365 Comment
  SEINET5586429  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-1 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53 558 Comment
  UCD56917  Astragalus rattanii var. jepsonianus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3520 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 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
  UCD63037  Astragalus rattanii var. jepsonianus Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along unnamed tributary of Bear Creek. 322 Comment
  UCR212305  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-5-11 2291 B Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  SEINET4680474  Astragalus rattanii var. jepsonianus D. W. McNeal 1988-3-31 3237 Colusa On a hillside above Bear Valley Rd., 0.6 mi NW of Hwy #20.; 0 Comment
  UCSB3001  Astragalus trichopodus var. lonchus Keator, Glenn 1958-4-16 Colusa Between Hough springs and Bartlett springs on road to Nice Comment
  JEPS53214  Athysanus pusillus W. L. Jepson 16277 Colusa Lodoga, in Coast Range foothills, w Colusa County Lodoga; Coast Range foothills, Lodoga 457 Comment
  JEPS80394  Athysanus pusillus L. R. Heckard and J. Hickman 1981-6-22 5627 Colusa below (south of) Dark Hollow Trail (Snow Mountain); Snow Mountain 1981 Comment
  SEINET5586423  Athysanus pusillus Richard R. Halse 2013-1 8763 Colusa Along State Hwy. 20 just eat of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53 558 Comment
  UCR256431  Athysanus pusillus Richard R. Halse 2013-3-27 8763 Colusa along State Hwy 20 just east of the Colusa/Lake Co. line, c. 14.6 mi east of the junction of State Hwys 20 and 53 558 Comment
  CAS-BOT-BC170615  Atriplex argentea Roxana Stinchfield 1916-7-1 462 Colusa Colusa - Williams Road, at bridge over the Trough Comment
  UCR205145  Atriplex argentea George K. Helmkamp, E. A. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCR225453  Atriplex argentea Craig D. Thomsen, Gordon Harrington 2008-7-6 2783 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond c. 0.2 miles to the south of the Roadkill cafe. 396 Comment
  CHSC107932  Atriplex argentea var. mohavensis B. Castro; L. Janeway 2011-7-9 1893 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. In swale about 400 ft north of large +- alkaline marsh; and widely scattered along NW and E edges of marsh.. 49 Comment
  CHSC107969  Atriplex argentea var. mohavensis B. Castro; Amy Lyons 2011-8-3 1899 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately I mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. At SW end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  JEPS59412  Atriplex argentea var. mohavensis W. L. Jepson 1924-10-27 10661 Colusa Alkali goose lands near Maxwell; near Maxwell Comment
  UC1609126  Atriplex coronata Vernon H. Oswald, Mike Wolder and Joe Silveira 1993-7-26 5701 Colusa ca 5 mi s Colusa (ca 1 mi n of Ware Rd., ca 1 mi w of Ohm Rd., Tract 18 on the s side of the Colusa National Wildlife Refuge); s side Colusa National Wildlife Refuge, s of Colusa 15 Comment
  CHSC60279  Atriplex depressa K. R. Stern 1980-6-30 6654 Colusa Vernal Pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC80183  Atriplex fruticulosa B. Castro; G. Kuenster 2000-7-19 1208 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 42 Comment
  UCD163708  Atriplex joaquinana Craig Thomsen 1999-5-10 2020 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS90604  Atriplex rosea Dean W. Taylor 1989-8-6 10509 Colusa Delevan National Wildlife Refuge Sacramento Valley (sw margin) 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
  HSC66008  Avena fatua Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 43 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UCD56362  Avena fatua Beecher Crampton 1962-4-17 6213 Colusa Sycamore. Comment
  UCD82112  Avena fatua Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5640 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  RSA726847  Azolla filiculoides Lowell A. Ahart 2007-7-7 14260 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UCD57629  Baccharis salicifolia Michele Lanctot; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. In the middle of a creek bed. 361 Comment
  UCD74307  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  UCD82586  Barbarea vulgaris Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2731 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1 mi E of Walker Ridge Rd. 609 Comment
  JEPS59784  Bassia hyssopifolia W. L. Jepson 1929-10-1 15341 Colusa Maxwell 25 Comment
  UCD97560  Bassia hyssopifolia P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. Comment
  UCD97576  Bassia hyssopifolia Herbert L. Mason 1946-8-6 12958 Colusa On Colusa-Marysville Highway, four miles south of Colusa, west side of Sacramento River. Comment
  CHSC85963  Bellardia trixago Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 137 Comment
  HSC90794  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of E Park Reservoir N of Lodoga 366 Comment
  JEPS108781  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
  JEPS80111  Boechera platysperma L. R. Heckard with J. Hickman 1980-7-1 5270 Colusa ca 10 mi w Stonyford (cirque between West and East Peaks; Colusa-Lake County line); Snow Mt. 1950 Comment
  JEPS80391  Boechera repanda L. R. Heckard, and J. Hickman 1981-6-22 5624 Colusa Dark Hollow trail Snow Mt. 1965 Comment
  CHSC117122  Boehmeria cylindrica B. Castro; Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd. off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  POM262504  Boisduvalia densiflora Milo S. Baker 1941-7-26 10132 Colusa Bear Valley along road. Stonyford to Williams highway Comment
  UCD140003  Bolboschoenus fluviatilis V. C. Bryant 1929-8-23 s.n. Colusa Colusa. Comment
  CHSC76535  Bolboschoenus glaucus Heidi West; Caroline Warren, Jenny Marr, Natalie Wight 1998-7-22 Colusa Vicinity of Logan Ridge, Funks Creek, and Hunters Creek. 121 Comment
  CHSC84931  Bolboschoenus glaucus Lowell Ahart 2003-10-23 10672 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCD163073  Bolboschoenus glaucus Vic Claassen 2016-3-8 s.n. Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Central part of Ranch to the south of Lynch Canyon. Southeast corner of an agricultural pond ( created from dammed drainage) known as Moonscape Pond. 458 Comment
  CAS-BOT-BC31371  Bolboschoenus maritimus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 467 Colusa Davis tule, near Sycamore Slough Comment
  CAS-BOT-BC31370  Bolboschoenus maritimus Roxana S. Ferris 1926-4-22 6283 Colusa Roadside ditch 3 miles west of Colusa. Comment
  CHSC107176  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-5-19 10287 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. In 0-6 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  CHSC83450  Bolboschoenus maritimus subsp. paludosus Bill Maslach 2001-6-6 14 Colusa Norman Rd., Colusa/Glenn Co. line. In roadside ditch. 50 Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  UCD82536  Briza maxima Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCSC001479  Briza minor Peter Kamb 1950-1 1696 Colusa Stonyford Comment
  CHSC89838  Brodiaea elegans subsp. elegans B. Castro; L. Janeway 2001-5-10 1248 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge. 396 Comment
  JEPS7631  Brodiaea elegans subsp. elegans W. L. Jepson 1920-5-23 8971 Colusa Bear Valley Bear Valley (sw Colusa County) 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
  UCD72459  Brodiaea elegans subsp. elegans Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3793 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  UCD82131  Brodiaea elegans subsp. elegans Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5657 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
  HSC45669  Bromus arenarius Stephen Plant 1978-4-22 204 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC45720  Bromus arenarius M. Alcasas 1978-4-22 47 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SBBG115860  Bromus arenarius B. Crampton 1958-5-19 4793 Colusa ca. 10.1 mi SE of Leesville, E of foothills known as Three Sisters Comment
  UCD37179  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Colusa County, 12 miles northwest of Rumsey, along Highway 16. Comment
  UCR119114  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Inner North Coast Ranges, 12 miles northwest of Rumsey, along Highway 16. 381 Comment
  UCD66872  Bromus diandrus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5075 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. South of junction with trail that heads down to the headwaters of Thompson Creek, upslope of very large stock pond. 629 Comment
  UCD84558  Bromus hordeaceus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6083 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  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
  UCD66569  Bromus laevipes Craig D. Thomsen 2001-5-24 2531 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
  UCR212307  Bromus laevipes Craig D. Thomsen 2001-5-24 2531 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  UCD81225  Bromus madritensis subsp. madritensis Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5562 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Canyon to the south of Destanella Flat. 446 Comment
  UCD57058  Bromus madritensis subsp. rubens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3645 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
  UCD64500  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-3-31 2084 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  SEINET4404370  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  UC1543019  Bromus tectorum Donald G. Nelson et. al. 1940-6-8 686 Colusa w boundary Snow Mountain, east not far from summit Snow Mountain; w boundary Snow Mountain 1981 Comment
  SEINET3923568  Bromus tectorum S. Bowie, J. Lopez; D. Riess 1994-4-23 0172 Colusa Leesville Quadrangle, Walker Ridge (BLM property). Collected along Bear Valley Road in Bear Valley, approx. 2.1 km south of intersection with Brimm Road.; 0 663 Comment
  UC1563672  Cacaliopsis nardosmia Barbara Ertter 1989-7-1 8595 Colusa road to Goat Mt. Lookout 2.2 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd) (at head of creek, ca 12 airmiles wsw of Stonyford); S Fork Stony Creek 1500 Comment
  UC1563843  Cacaliopsis nardosmia Barbara Ertter 1989-7-1 8595 Colusa road to Goat Mt. Lookout 2.2 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd) (at head of creek, ca 12 airmiles wsw of Stonyford); S Fork Stony Creek 1500 Comment
  RSA141301  Cacaliopsis nardosmia J. M. Tucker, John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout and Upper Letts Valley (ca. 2.5 miles, airline, north of the lookout), Goat Mountain. 1448 Comment
  UCD129653  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3527 Colusa road between Goat Mountain Lookout and Upper Letts Valley (ca. 2.5 miles, airline, north of the lookout), Goat Mountain. 1447 Comment
  CHSC112207  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  RSA0115082  Calandrinia breweri Lowell A. Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  JEPS52594  Calandrinia ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  UCD57308  Calandrinia ciliata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3679 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  HSC62784  Calandrinia ciliata Thomas Wood 1979-4-14 111 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 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
  UCD57052  California macrophylla Gordon Harrington; Diana Hickson 2007-4-7 0011 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. Comment
  JEPS80389  Calocedrus decurrens L. R. Heckard and J. Hickman 1981-6-22 5622 Colusa at edge Veratrum meadow; Snow Mt., Dark Hollow Creek, Big Meadow, Veratrum meadow 1889 Comment
  CHSC79618  Calochortus amabilis B. Castro; L. P. Janeway 2000-5-3 1126 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  CHSC85971  Calochortus luteus Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  CHSC89879  Calochortus luteus B. Castro; L. Janeway 2001-5-10 1248 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge on steep E-facing slope 396 Comment
  JEPS122381  Calochortus luteus Nisrine Machaka-Houri with Gracie Benson-Martin 2014-5-3 NG 1 Colusa Bear Valley Road Comment
  CAS-BOT-BC491929  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  JEPS81411  Calochortus splendens L. R. Heckard and J. C. Hickman 1982-7-9 6019 Colusa near Horse Glade and road to Lookout junction (along road to Lookout, Goat Mt., Colusa-Lake County boundary) 1737 Comment
  UC1051717  Calochortus superbus Helen K. Sharsmith 1953-6-19 4269 Colusa near North and Middle Forks of Stony Creek confluence; Inner North Coast Ranges, Mendocino National Forest 548 Comment
  CAS-BOT-BC132571  Calochortus uniflorus Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley nr. Leesville 304 Comment
  CHSC42778  Calochortus uniflorus Deborah Grobman 1975-5-11 13 Colusa 3.6 miles east of Leesville on Leesville Grade. Comment
  JEPS15268  Calochortus uniflorus Rimo Bacigalupi with G. T. Robbins, S. Galen Smith, and Peter Kamb 1950-4-16 3126 Colusa along Bear Creek, along road following the length of Bear Valley, at about its middle, close to BM 1326 ft, w-most Colusa County Bear Valley, Bear Creek Comment
  RSA304209  Calochortus uniflorus James R. Shevock 1972-3-25 1449 Colusa Bear Valley. 396 Comment
  SEINET3992250  Calochortus uniflorus Rimo Bacigalupi, T. Crovello, L Heckard 1965-4-26 9045 Colusa 4.0 mi south of point at which road takes off westward to Bartlett Springs; Bear Valley Comment
  HSC65993  Calochortus vestae D. Boyd, M. Eichelberger, Tim Messick, Tom Ranker 1980-4-20 46 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  CHSC112620  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC1552845  Calycadenia pauciflora Frederica Bowcutt 1985-6-19 605 Colusa just sw, n of Wilbur Hot Springs about 2 air miles Bear Valley Comment
  UCD146725  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1/2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCD82487  Calycadenia pauciflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 a Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  CAS-BOT-BC270749  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles N of Stoneyford on road to Fout Springs 609 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
  CAS-BOT-BC270752  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa Bear Valley Road, 0.1 mile N of junction with Brim Road (to Bartlett Springs), ca. 2 miles SW of Leesville Comment
  CAS-BOT-BC270815  Calycadenia pauciflora A. A. Heller 1919-6-8 13239 Colusa Near Lodoga Comment
  RSA255554  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
  RSA255557  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles north of Hwy. 20 on Bear Valley Road, along banks of Bear Creek. Comment
  RSA255608  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles west of Lodoga on road to Stoneyford 412 Comment
  RSA255613  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles southwest of Leesville on Bartlett Spr. Road 518 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  UC1876243  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mi E of Lake Co. line on Bartlett Springs Rd. Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UCD129804  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles west of Lodoga on road to Stoneyford. 411 Comment
  UCD129805  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa on road to Trout Creek Trail, 0.5 mile northwest of driveway to Fout Spr. Boy's Ranch. 502 Comment
  UCD129838  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs Road on Walker Ridge Road, Buck Flat. 868 Comment
  HSC86928  Calycanthus occidentalis Anthony J. Desch, Bryon Cariss 1988-4-16 34 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  UC1543009  Calycanthus occidentalis Donald G. Nelson et. al. 1940-6-9 694 Colusa Happy Creek Camp Stony Creek, Paradise Creek (on Paradise Creek, which empties into middle fork of Stony Creek, nw corner of Colusa County) 731 Comment
  UCD13380  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa 2.8 miles west of Stonyford, along Foot Springs Rd. Comment
  UCD67591  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa Along Fouts Spring Rd., 2.8 miles W of Stonyford, along roadside. Growing along small stream, soil dry. Large shrub, ca. 10 ft tall, flowers large, reddish. Comment
  UCD82572  Calycanthus occidentalis Craig Thomsen 2008-6-12 2763 Colusa Walker Ridge, Elgin Mine area. Comment
  JEPS81077  Calyptridium quadripetalum Thomas W. Nelson and Jane P. Nelson 1980-6-24 5880 Colusa along trail to Snow Mountain trail head at Summit Springs, Six Rivers National Forest Summit Springs (Lake Pillsbury Quadrangle); Six Rivers National Forest, Snow Mountain trail 1584 Comment
  CDA39872  Calystegia collina T. C. Fuller 1958-5-27 3670 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  RSA394936  Calystegia collina subsp. collina Eugene Memmler 1969-5-8 106 Colusa Hwy 20, Between Williams and Clear Lake. 152 Comment
  CHSC70976  Calystegia collina subsp. oxyphylla Vernon Oswald; Lowell Ahart 1998-5-7 9000 Colusa Barlett Springs Rod. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  RSA800324  Calystegia collina subsp. oxyphylla Sandra M. Namoff, Eric R. Carter 2013-6-16 79 Colusa North of Hwy. 20 take Bear Valley Rd to Brim Rd, population is 0.2 miles NE of intersection of Brim Rd and Bartlett Springs Rd. 648 Comment
  UCD82493  Calystegia collina subsp. oxyphylla Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5682 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  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
  RSA261450  Camassia leichtlinii subsp. suksdorfii J. M. Tucker, L. K. Mann 1959-5-30 3531 Colusa Small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout 1220 Comment
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  HSC83363  Camissonia graciliflora Eugene Tanimoto 1975-4-20 17 Colusa Bear Valley Rd., 8.7 mi. N of intersection with Hwy. 20 Comment
  UCD37191  Camissoniopsis hirtella Beecher Crampton 1958-5-19 4807 Colusa 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  UCD82382  Camissoniopsis intermedia Craig Thomsen; G. Harrington 2009-5-12 2823 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  JEPS120912  Campanula angustiflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD56906  Capsella bursa-pastoris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3509 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCR206868  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14315 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  RSA0116218  Cardaria chalepensis David W. Isle 2007-4-13 1633 Colusa About 1 mile east of Maxwell; south of Maxwell Road and east of Lyons Road in ditch between rice fields east of William Dirk s shop. 30 Comment
  CHSC107961  Carduus pycnocephalus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1848 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.6 mi southeast of Funks Reservoir and 130 ft east of Tehama-Colusa Canal. Ca 0.3 mi NW of large +- saline/alkaline wetland/marsh, next to large transmission-line towers. 54 Comment
  CHSC78603  Carduus pycnocephalus J. Marr; C. Warren, J. Michaels 1998-5-4 Colusa Vicinity of Sites, Logan Ridge and Golden Gate. 76 Comment
  UCD57706  Carduus pycnocephalus Daniel Chau; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  CHSC115615  Carduus pycnocephalus subsp. pycnocephalus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2153 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  UC767029  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek 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
  JEPS80035  Carex densa L. R. Heckard and R. Bacigalupi 1976-9-6 4426 Colusa Along trail from Summit Springs to Fouts Camp, Snow Mountain. Comment
  CHSC91548  Carex fracta Barbara L. Wilson; Richard Brainerd, David Isles, Lawrence Janeway 2002-6-28 10706 Colusa Ford Spring, on eastern end of Pine Ridge, overlooking Trout Creek; on Goat Mountain Road above the Trout Creek Bridge on the Pine Ridge grade, within 1/2 mile of Trout Creek. In roadside ditch. UTM: 10S 533575e 4343812n. 630 Comment
  UC1563913  Carex fracta Barbara Ertter 1989-7-1 8610 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 Comment
  JEPS75123  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa ne slope of West Peak Snow Mt., West Peak 2072 Comment
  CHSC76352  Carex klamathensis L. P. Janeway; B. Castro 1999-7-5 6497 Colusa At Bear Wallow Spring; on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. 1045 Comment
  JEPS75130  Carex luzulina var. luzulina L. R. Heckard 1972-7-8 3041 Colusa north side of ridge running southeast of Snow Mt., West Peak 2011 Comment
  UCD84435  Carex nudata Jack Alderson 2009-4-8 31 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  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
  UCD61461  Carex praegracilis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3907 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCD63129  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4959 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  JEPS80858  Carex serratodens L. R. Heckard and J. C. Hickman 1981-7-30 5739 Colusa along Trout Creek trail, se side Snow Mt. Snow Mt., Trout Creek trail 1676 Comment
  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
  JEPS81328  Carex serratodens L. R. Heckard and J. C. Hickman 1982-7-6 5942 Colusa about 1/2 mi ne Summit Springs (e of trail, s side Snow Mt.); Snow Mt. 1645 Comment
  UCD63115  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4946 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 398 Comment
  UCD72514  Carex vulpinoidea Jack Alderson 2008-6-1 s. n. Colusa southwest of Williams, intersection of Walnut Drive and Stovall Road. Comment
  UCR49825  Castilleja L. F. LaPre 1987-6-30 s.n. Colusa Mendocino National Forest, turnout on Stony Creek Road 474 Comment
  CAS-BOT-BC249072  Castilleja affinis Roxana S. Ferris 1926-4-23 6585 Colusa 2 miles from Stonyford 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
  UC2014139  Castilleja applegatei Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  CHSC114942  Castilleja applegatei subsp. martinii Lowell Ahart 2015-4-10 20013 Colusa Road cut, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chapararal. 500 Comment
  CHSC88871  Castilleja applegatei subsp. martinii Christine Hantelman 2000-4-1 46 Colusa At side of Bear Valley Road. 365 Comment
  UCD163329  Castilleja applegatei subsp. martinii Craig D. Thomsen 2009-5-3 2797 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD81237  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5401 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 223 Comment
  CAS-BOT-BC257276  Castilleja attenuata George K. Helmkamp; E. A. Helmkamp 2011-4-1 17122 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  CHSC107964  Castilleja attenuata B. Castro; T. Boullion 2011-4-20 1841 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. Off north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in grassy uplands. 49 Comment
  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
  CHSC81307  Castilleja attenuata J. Trizzino 2001-3-31 16 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  CHSC86031  Castilleja attenuata Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  JEPS124209  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  RSA0011988  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  SBBG128982  Castilleja attenuata G. K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Rd, 1.8 mi SE of Sites 77 Comment
  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
  CHSC27851  Castilleja exserta Susan Perkins 1978-4-8 33 Colusa Meadow ca. 3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UCD81230  Castilleja exserta Ellen Dean; K. Mawdsley, B. Rice 2009-5-6 5567 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
  CHSC59611  Castilleja exserta subsp. exserta Carole Pauls 1975-4-20 5 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC89874  Castilleja exserta subsp. exserta B. Castro; S. Innecken 2001-3-26 1218 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. On top of small knoll. 91 Comment
  JEPS124238  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-1 20000 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  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
  CHSC48974  Castilleja foliolosa Vernon Oswald 1983-3-28 224 Colusa About 19.3 mi s 7 e of Stonyford on the Sites-Lodoga Rd. 457 Comment
  CHSC81309  Castilleja foliolosa L. P. Janeway; B. Castro 2001-4-18 7023 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 274 Comment
  HSC87084  Castilleja foliolosa L. Blackford, S. Branch, D. Malm 1988-4-16 68 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  RSA589920  Castilleja foliolosa Michael A. Vincent, Robert M. Rhode 1996-3-30 7297 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  UCR225396  Castilleja foliolosa Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5092 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat 648 Comment
  HSC97657  Castilleja foliolosa Danny Pineda 2001-4-21 7 Colusa Found at Walker Ridge area 671 Comment
  CDA11256  Castilleja miniata subsp. miniata G. F. Hrusa 1994-11-7 11991 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. on banks of Frenzel Creek, a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  JEPS121787  Castilleja miniata subsp. miniata David Isle 2013-8-23 2049 Colusa COLUSA County, CA. W bankSalt Ck, ~ 150' NE of Dannis Dr Bridge on Isle Property. Comment
  JEPS82742  Castilleja rubicundula subsp. lithospermoides L. R. Heckard and J. C. Hickman 1984-4-6 6150 Colusa near Bear Valley road junction with Route 20 (along Bear Valley road, e of Clear Lake Oaks) Comment
  CHSC34821  Castilleja rubicundula subsp. rubicundula M. S. Taylor; E. Pierce 1981-5-17 3757 Colusa On e side of Ladoga-Stonyford Rd. 335 Comment
  JEPS11156  Castilleja rubicundula subsp. rubicundula W. L. Jepson 1932-5-8 16284 Colusa Stonyford; w Colusa County 365 Comment
  JEPS33902  Castilleja rubicundula subsp. rubicundula D. E. Breedlove 1963-5-30 5183 Colusa 17 mi e Bartlett Springs (on floor of Bear Valley); Bear Valley Comment
  JEPS81972  Castilleja rubicundula subsp. rubicundula Rimo Bacigalupi, T. Crovello and L. Heckard 1965-4-26 9042 Colusa 0.7 mi w Wilbur Springs and Bear Valley junction (on Blue Ridge along Bear Creek Road); Blue Ridge 341 Comment
  RSA182037  Castilleja rubicundula subsp. rubicundula Annetta Carter, Louise Kellogg 1953-6-20 3239 Colusa Road to Leesville, 6 miles north of Wilbur Springs Junction 400 Comment
  UC1745694  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1389 Colusa S end of lake 0.4 mi. N of Lodoga. Comment
  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
  UCD82578  Castilleja rubicundula subsp. rubicundula Craig Thomsen 2008-6-12 2768 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  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
  UCD114215  Caulanthus flavescens J. M. Tucker 1958-3-7 3364 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  UCD67002  Caulanthus lasiophyllus Craig D. Thomsen 2008-5-23 2748 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  CAS-BOT-BC40507  Caulanthus lasiophyllus Roxana S. Ferris 1917-4-12 504 Colusa 4 miles east of Wiliams. Comment
  CDA12246  Ceanothus cuneatus G. F. Hrusa 1989-2-7 5808 Colusa Inner North Coast Ranges; Leesville Road between Bear Valley & Williams. 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
  RSA399079  Ceanothus cuneatus Carolyn Sanford 1977-4-24 352 Colusa Above Barrel Springs Campground. 701 Comment
  UCD111738  Ceanothus cuneatus Beecher Crampton 1975-4-21 9165 Colusa 4 miles N.N.E. of Lodoga. 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
  HSC98203  Ceanothus cuneatus Steven Lagos 1974-5-4 50 Colusa 915 Comment
  UC80064  Ceanothus cuneatus var. cuneatus T. S. Brandegee Apr 1889 701 Colusa Leesville Comment
  UC2014137  Ceanothus integerrimus Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Along Walker Ridge Road, between Cold Spring and Buck Flat. Comment
  UCD170260  Ceanothus integerrimus D. O. Burge 2016-11-3 2185 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 630 Comment
  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
  SEINET11191747  Ceanothus integerrimus C. L. Schmidt 1989-5-6 1244 Colusa Between Stonyford and Fouts Springs. 600 Comment
  CAS-BOT-BC83780  Ceanothus jepsonii D. O. Burge; V. Church 2007-12-28 971 b Colusa Mendocino National Forest, roadside on Fouts Spring Road 580 Comment
  HSC90415  Ceanothus jepsonii C. Wilson, P. Kittelson, M. Hardig 1992-4-11 42 Colusa Walker Ridge Rd., 1.0 mi S of Blue Oak Recreation Site 76 Comment
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Aug 18 2014
  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
  CHSC93619  Ceanothus jepsonii var. albiflorus C. L. Schmidt 1989-6-13 1253 Colusa 1 mile up dirt road to Trout Creek near Davis Campsite and Fouts Springs Campground ca. 9 mi W of Stonyford; on E side of Snow Mountain. 600 Comment
  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
  UCD148667  Ceanothus parvifolius G. Ledyard Stebbins 1985-5-19 C 530 Colusa Southeast of Goat Mountain peak. Pacific Point along Goat Rock Ridge, east of Goat Rock. (Exact location unknown; coordinates estimated by label maker. Note, Pacific Point at 3700 ft does not quite fall into Section 25.) 1127 Comment
  UCD66479  Centaurea calcitrapa Craig D. Thomsen 2001-5-6 2556 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. 310 Comment
  CHSC84199  Centaurea melitensis Lowell Ahart 2003-7-14 10387 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  CHSC86117  Centaurea melitensis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  JEPS104358  Centaurea melitensis Lowell Ahart 2003-7-14 10387 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 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
  UCR206392  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14758 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC284462  Centaurea solstitialis Roxana Stinchfield 1916-7-12 474 Colusa Street - College City Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  SEINET11860767  Centaurea solstitialis C. L. Abbott 1926-6-27 s.n. Colusa Colusa Comment
  JEPS93803  Centaurium trichanthum Vernon H. Oswald and Lowell Ahart 1998-7-15 9267 A Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UCR227905  Centaurium trichanthum Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5060 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 555 Comment
  CHSC107285  Centromadia fitchii L. P. Janeway; B. Castro 2011-7-9 10505 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Generally natural area centered around a shallow ephemeral alkaline marsh and adjacent wetland swales. In an area that is not quite a vernal pool near the eastern boundary of the area. 49 Comment
  JEPS68349  Centromadia fitchii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2789 Colusa on Ladoga rd about 3 mi s Stonyford 335 Comment
  CAS-BOT-BC384657  Centromadia parryi subsp. parryi Andrew Townesmith; Karen M. Meyer 2007-8-7 909 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 499 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
  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
  JEPS118719  Centromadia parryi subsp. rudis B. Castro with Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  CAS-BOT-BC279206  Centromadia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa Comment
  CAS-BOT-BC279208  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  JEPS105679  Centromadia pungens subsp. pungens L. P. Janeway 2002-4-25 7525 Colusa Sacramento Valley; vicinity of Funks Creek and Tehama - Colusa Canal 51 Comment
  CHSC105205  Centromadia pungens subsp. septentrionalis K. R. Stern 1980-6-1 6643 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC83633  Centromadia pungens subsp. septentrionalis L. P. Janeway 2002-4-25 7525 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. Comment
  RSA0034161  Cercis occidentalis M. Bourell 1997-3-29 5771 Colusa Mendocino National Forest. Dixie Glade Campground. 918 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
  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
  HSC71298  Cercocarpus montanus var. glaber Thomas W. Nelson, Jane P. Nelson 1979-4-12 4628 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS81415  Chaenactis douglasii var. douglasii L. R. Heckard and J. C. Hickman 1982-7-9 6023 Colusa near summit of, Lookout Goat Mt. (Colusa-Lake Counties boundary) Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain Comment
  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
  CHSC27634  Chaenactis glabriuscula var. heterocarpha Robert Schlising 1978-5-13 3234 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC53931  Chaenactis glabriuscula var. heterocarpha Vernon H. Oswald 1991-4-21 4518 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  CHSC86521  Chaenactis glabriuscula var. heterocarpha B. Castro; Beth Hendrickson 2003-3-19 1394 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 259 Comment
  UC185417  Chaenactis glabriuscula var. heterocarpha Katharine Brandegee Colusa near Leesville (Epperson's) Comment
  UCD130361  Chaenactis glabriuscula var. heterocarpha John M. Tucker 1969-4-26 4163 Colusa east of road, in middle part of Bear Valley. Comment
  UCD74341  Chaenactis glabriuscula var. megacephala G. Ledyard Stebbins 1968-5-10 6685 Colusa Summit of Walker Ridge, on Lake- Colusa County line, between Hwy 20 and Leesville - Bartlett Springs Rd. South of Leesville at summit of Cold Spring Mtn. (Note: date in notebook is 10 May, but labels made by Stebbins at CAS say 15 May.) 1091 Comment
  CHSC84965  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2003-10-23 10665 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS120711  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 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
  UC535095  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Creek Lodoga Comment
  JEPS80052  Cheilanthes gracillima L. R. Heckard with J. Hickman 1979-6-15 5052 Colusa e trail from Frog Pond to cirque of e and w peaks Snow Mt (ne slope of West Peak ridge) 1981 Comment
  CHSC62917  Cheilanthes intertexta Vernon H. Oswald; Lowell Ahart 1994-4-6 6061 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  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
  CHSC94440  Chenopodium album Lowell Ahart 2006-8-9 13120 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94517  Chenopodium album Lowell Ahart 2006-8-22 13221 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS110404  Chenopodium album Lowell Ahart 2006-8-22 13221 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  RSA724893  Chenopodium album L. Ahart 2006-8-22 13221 -A Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UC1195198  Chenopodium album J. H. Thomas 1960-8-30 8865 Colusa about 5 mi nw College City (along road to Sycamore) Comment
  JEPS110058  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  RSA140835  Chenopodium berlandieri var. sinuatum John H. Thomas 1960-8-30 8865 Colusa About 5 miles northwest of College City along road to Sycamore. Comment
  RSA724958  Chenopodium botrys L. Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  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
  SEINET11696150  Chloris gayana Unknown 1961-7-20 5932 Colusa 2 mi S of Grimes Comment
  UCD63102  Chlorogalum pomeridianum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4933 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  CDA39316  Chlorogalum pomeridianum T. C. Fuller 1958-5-27 3661 Colusa South of Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  CDA11411  Chorizanthe membranacea G. F. Hrusa, K. van Katwyk 1995-4-22 12132 Colusa Inner North Coast Ranges; Along Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC80410  Chorizanthe membranacea Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CHSC86512  Chorizanthe membranacea B. Castro 2003-3-18 1390 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  UCR138873  Chorizanthe membranacea B. Ellyson, J. Hooke, D. Newman 1996-5-5 43 Colusa Coast Range, Leesville, 9.7 mi NW of Hwy 20 on Leesville Rd.; 70 mi east of Hwy 101 on Hwy 20 445 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
  UC1532347  Cicuta Vernon Oswald 1986-6-30 2176 Colusa North end of Lily Pond near Letts Lake. 1188 Comment
  CDA1158  Cirsium cymosum T. C. Fuller 1958-5-27 3667 -B Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  SEINET3840083  Cirsium cymosum T. C. Fuller 1958-5-27 3667 Colusa south of highway 20, 1 mile west of the junction with highway 16 Comment
  JEPS80872  Cirsium cymosum var. cymosum L. R. Heckard and J. C. Hickman 1980-7-1 5292 Colusa above Summit Springs (just above trail entrance to roadless area, Colusa-Lake County boundary); Snow Mt. 1645 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
  CHSC32911  Clarkia affinis C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 55 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  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
  CHSC86959  Clarkia affinis B. Castro 2003-4-10 1421 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In E-trending small side canyon tributary. 158 Comment
  UCD57561  Clarkia affinis Stephanie Castle; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, on small rise south of Craig Creek. 304 Comment
  UCD72458  Clarkia affinis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3792 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  LA17909  Clarkia concinna Peter H. Raven; 1962-5-31 sn Colusa State Hwy 20, 2.5 mi E of Lake County line 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
  CHSC1095  Clarkia concinna subsp. concinna V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  UCD66685  Clarkia concinna subsp. concinna Craig D. Thomsen 2000-5-11 2312 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  POM216174  Clarkia concinna subsp. concinna D. D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  UC1212149  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa about 1/4 mi e Cooks Spring (near Cooks Creek); Inner North Coast Ranges Comment
Read comments
Nov 19 2007
  UCD63108  Clarkia gracilis subsp. gracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4939 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  RSA41127  Clarkia gracilis subsp. gracilis Robert F. Hoover 1938-4-24 3231 Colusa Stone Corral Canyon below Sites. Comment
  CHSC112017  Clarkia gracilis subsp. sonomensis David Isle; F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of jct w/ Lodoga-Stonyford Road. 408 Comment
  UCD146724  Clarkia gracilis subsp. tracyi G. F. Hrusa 1998-6-19 14597 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
  CHSC79779  Clarkia modesta L. P. Janeway; B. Castro 2000-5-4 6702 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 265 Comment
  HSC86833  Clarkia purpurea S. L. Steinwert 1985-4-13 10 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  UCD104881  Clarkia purpurea Karen Rose 1985-4-13 4 Colusa Salt Canyon, N side of Salt Creek, Highway 20, 11 miles WSW of Williams. 143 Comment
  UCD64423  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2180 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82462  Clarkia purpurea subsp. quadrivulnera Craig Thomsen; G. Harrington 2009-5-12 2840 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC79780  Clarkia rhomboidea G. F. Hrusa 1998-6-19 14604 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~2 km. W of campground. UTM: 10S 05351 N, 43466 E. 490 Comment
  HSC94112  Clarkia rhomboidea G. Fred Hrusa 1998-6-19 14604 Colusa Above Upper Little Stony Creek, Goat Mtn. Rd., about 2 km W of campground 490 Comment
  UC1585901  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 Colusa 2.2 mi s of Rt. M-10 (Bear Creek-Fouts Spring Rd.) (road to Goat Mt. Lookout, at head of S. Fk. Stony Creek, ca. 12 air mi wsw of Stonyford) 1500 Comment
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  SBBG122897  Clarkia rhomboidea B. Ertter 1989-7-1 8597 Colusa rd to Goat Mtn lookout, 2.2 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1500 Comment
  CHSC69690  Claytonia exigua subsp. exigua Vernon Oswald 1984-5-2 1172 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18n01) 11.9 mi w of Stonyford. Growing in gravel on a road cut. 868 Comment
  UC1745695  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1383 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UC1745699  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1388 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  CHSC72459  Claytonia gypsophiloides L. P. Janeway; David Isle 1998-7-3 5709 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  UC1745697  Claytonia gypsophiloides Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1380 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  JEPS97385  Claytonia parviflora subsp. parviflora Vernon H. Oswald and L. Ahart 1994-4-6 6055 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  SEINET199009  Claytonia parviflora subsp. parviflora H. K. Sharsmith 1953-6-19 4285 Colusa Mendocino National Forest ; Near Trough Springs on Trough Springs Ridge 980 Comment
  UCD66965  Claytonia perfoliata Ellen Dean; Davis Botanical Society 2008-5-31 5009 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  JEPS15557  Claytonia saxosa G. Thomas Robbins with L. R. Heckard 1956-7-25 3724 Colusa 0.25 mi s Snow Mt. West summit (on ridge forming s extension of Snow Mt. West, Lake-Colusa County boundary); Snow Mt. West 2103 Comment
  CAS-BOT-BC92546  Clematis ligusticifolia A. F. Hough 1924-6-22 3 Colusa California Forest. McDaniels R.S. 914 Comment
  CHSC57516  Collinsia grandiflora Lance E. Neuman 1987-4-4 5 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UCSB63619  Collinsia grandiflora Maslin, Linyi 1981-4-15 Colusa Ca. 0.5 km w of jct of Hwys 20 & 16; s side of Bear Creek; Ca. 27 km sw of Williams; Wilbur Springs Quadrangle, 15'; S central border of Sect. 36. T14N, R5W 319 Comment
  UCD123553  Collinsia greenei G. Ledyard Stebbins Jr. 1964-7-4 6170 Colusa northeast side of Mt. St. John, west of Stonyford. 1524 Comment
  CHSC33348  Collinsia heterophylla R. M. Winchell 1980-4-12 1 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
  CHSC9540  Collinsia heterophylla L. V. Ritter 1969-4-30 222 Colusa Ca. 10 mi sw of Williams, s side of Hwy 20. Comment
  UCD57100  Collinsia heterophylla Gordon Harrington; Diana Hickson 2007-4-7 0015 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCR104588  Collinsia heterophylla Peter S. Lathrop 1993-4-15 s.n. Colusa North Coastal Range, along California State Highway 16, 5 miles south of State Highway 20 305 Comment
  JEPS86640  Collinsia rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6682 Colusa sw flank Snow Mtn. (trail from Summit Springs); Colusa-Lake County Line, Snow Mtn. 1590 Comment
  JEPS94165  Collinsia sparsiflora var. arvensis Vernon Oswald and Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodoga Rd. 4.2 mi. s. Stonyford 384 Comment
  UCD57726  Collinsia sparsiflora var. arvensis Jordan Thompson; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. North side of Craig Creek on south side of unimproved road. 335 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
  UC638654  Collinsia sparsiflora var. collina Ethel Crum 1938-5-8 2029 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  JEPS81340  Collinsia torreyi var. wrightii L. R. Heckard and J. C. Hickman 1982-7-6 5953 Colusa West Peak Snow Mt (second meadow from Cedar Camp to Dark Hollow Cirque) 1981 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
  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
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  JEPS83552  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa w side of Ohm Rd ca 0.5 mi n jct. w/ Ware Rd.; Colusa Nat'l Wildlife Refuge, Arbuckle 7.5' quad. 13 Comment
  JEPS83787  Cordylanthus palmatus J. D. Jokerst 1988-8-23 3036 Colusa Cell No. 12 Delevan National Wildlife Refuge (e of the old barn, n central portion of Refuge) Comment
  RSA0084708  Cordylanthus palmatus Ellen Cypher 2005-8-22 2005 -023 Colusa Delevan National Wildlife Refuge, Tract 12, CNDDB EO# 13 18 Comment
  SEINET10582733  Cordylanthus palmatus R. D. Stone 1987-1 Colusa Comment
  UCD81723  Cordylanthus pilosus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5727 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
  RSA500440  Cordylanthus pringlei Vernon H. Oswald 1989-4-12 4008 Colusa Goat Mtn Rd. 2.1 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. On the n side of Little Stony Creek. 412 Comment
  RSA505428  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  UC1776781  Cornus glabrata G. F. Hrusa 1989-5-7 6086 Colusa North Coast Ranges; Road to Cedar Mtn., along Little Stony Creek, approx. 2.5 miles above intersection with Stonyford-Lodoga Rd. Shaded area beneath Populus fremontii 450 Comment
  UCD13381  Cornus glabrata Charles Martin 1986-5-17 30 Colusa Along roadside, 2.8 miles west of Stonyford. Along Foot Springs Rd. Comment
  CHSC75703  Cornus sericea subsp. occidentalis Vernon H. Oswald; Lowell Ahart 1999-6-22 9777 Colusa Lily Pond near Upper Letts Lake west of Stonyford. 1243 Comment
  CHSC101073  Cotula coronopifolia David W. Isle 2006-5-12 1628 Colusa In pre-chiseled rice field 4+ miles NE of Maxwell on W Delevan Hunting Club property farmed by W. Dirks and J. Barrett. 30 Comment
  SEINET7836975 Image available Cotula coronopifolia R. R. Halse 2007-3-23 7109 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  CHSC62886  Crassula tillaea Vernon H. Oswald 1994-3-14 5993 Colusa Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. Sacramento National Wildlife Refuge. 25 Comment
  CDA16109  Crypsis schoenoides G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15244 Colusa North Coast Ranges; Along Leesville Rd., +/- 1 mi S of Lodoga. 320 Comment
  CHSC52702  Crypsis schoenoides James Jokerst 1985-4-24 2494 Colusa Near Lurline Creek. 41 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
  JEPS120801  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UCD55460  Crypsis schoenoides Ellen Dean; Gordon Harrington 2006-10-6 3284 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
  SEINET3926255  Crypsis schoenoides Barbara Ertter, Elizabeth Neese; Laura Fujii; Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga.; 0 366 Comment
  CAS-BOT-BC190166  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 miles south of Colusa. 15 Comment
  UC1131372  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 mi s Colusa; Colusa Quadrangle 15 Comment
  UCD59987  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa North Coast Ranges. Bear Creek at junction of Sulphur Creek near Sulphur Springs. Comment
  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
  OBI20714  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  JEPS90300  Cryptantha flaccida Dean W. Taylor 1992-4-16 12408 Colusa on hillsides 0.4 mi due w from spillway into Little Stony Creek (East Park Reservoir); Inner North Coast Range, East Park Reservoir 411 Comment
  UC1053453  Cryptantha flaccida Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3168 Colusa 8 mi nw Maxwell (along road to Sites, through first hills on extreme w edge of the Sacramento Valley); Sacramento Valley Comment
  UC1177897  Cryptantha flaccida Peter M. Ray 1950-4-16 1715 Colusa junction of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  UC78716  Cryptantha flaccida T. S. Brandegee Apr 1889 Colusa Leesville Comment
  UCD56903  Cryptantha flaccida Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3506 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
  SEINET7881830 Image available Cryptantha hendersonii Helen K. Sharsmith 1953-1 4278 Colusa One mile north of Trough Springs on Trough Springs Ridge; Mendocino National Forest 914 Comment
  CHSC106242  Cryptantha hispidula B. Castro; L. P. Janeway 2001-6-3 1258 B 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. 883 Comment
  HSC3611  Cryptantha hispidula Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  JEPS89019  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa County line, on road to Williams Comment
  UC1178523  Cryptantha hispidula Leo Koch 1940-4-29 936 A Colusa near Lake and Colusa county line (along Hwy 20) Comment
  UCD63018  Cryptantha hispidula Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4670 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. 409 Comment
  UCD66613  Cryptantha hispidula Craig D. Thomsen 2000-5-11 2284 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
  CDA15300  Cryptantha intermedia G. F. Hrusa 1993-5-2 10865 Colusa North Coast Ranges; Frenzel Creek Research Natural Area-Mendocino Natl. Forest. Mouth of Frenzel Creek at confluence with Little Stony Creek. Comment
  UC1051711  Cryptantha intermedia Helen K. Sharsmith 1953-6-19 4278 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  UC638656  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC726038  Cryptantha intermedia A. A. Heller 1940-5-6 15581 Colusa near Lake County line on State Highway 20 (near a bench mark) 232 Comment
  UCD57302  Cryptantha intermedia Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 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
  UCR198141  Cryptantha intermedia Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 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
  UC624289  Cryptantha intermedia L. Constance 1939-5-14 2489 Colusa 0.5 mi e Mill Creek Ranger Station; Inner North Coast Ranges 548 Comment
  HSC48168  Cryptantha intermedia var. hendersonii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3932 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  CHSC112215  Cryptantha intermedia var. intermedia Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18630 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
  CHSC79477  Cryptantha microstachys B. Castro; L. P. Janeway 2000-5-4 1142 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 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
  UC1731395  Cryptantha muricata Dean W. Taylor 1998-6-16 16662 Colusa Sulphur Creek canyon 0.5 mi below (e) Wilbur Springs (n-facing shale slide); North Coast Ranges, Walker Ridge and vicinity 381 Comment
  UC78651  Cryptantha nemaclada Katharine Curran 1884-1 Colusa Comment
  JEPS80034  Cryptantha torreyana L. R. Heckard 1974-9-10 3900 A Colusa top of East Peak Snow Mt., East Peak 2148 Comment
  SEINET8731274 Image available Cryptantha torreyana Helen K. Sharsmith 1953-1 4282 Colusa Near Trough Springs on Trough Springs Ridge; clearing in Sugar Pine-Douglas Fir forest, Mendocino National Forest. 975 Comment
  RSA388860  Cupressus macnabiana Linda Bell 1975-4-20 63 Colusa Walker Ridge Road ca. 7 miles from the junction with State Highway 20 Comment
  UC1116696  Cuscuta californica Beecher Crampton 1961-7-20 5935 Colusa 4 mi se Grimes (along Knight's Landing Road) Comment
  UCD81892  Cuscuta californica var. californica Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5776 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. SW of Roadkill Cafe near stock pond. 429 Comment
  POM312627  Cuscuta indecora H. L. Mason, Verne Grant 1946-8-6 12974 Colusa Pond 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  UCD150721  Cycladenia humilis var. humilis Susan Harrison 2011-8-8 s.n. Colusa California, Colusa County. Snow Mountain. Along trail to Summit Basin. 1920 Comment
  UCD60095  Cynodon dactylon Kathryn Johnson 1966-5-14 51 Colusa 14 miles east of Lodoga on road to Maxwell. Comment
  UCD60101  Cynodon dactylon Dorman Sumner 1958-5-27 s. n. Colusa 6.5 miles south of College City, Howard Johnson Ranch. Comment
  UCR152111  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 mi south of College City, just NE of Hershey Railroad siding; Grieve Road (Country Road 88) Comment
  CHSC62839  Cynoglossum grande Vernon H. Oswald; Lowell Ahart 1994-3-23 6023 Colusa Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford. On slopes along the creek. 490 Comment
  RSA0060513  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UC1100564  Cyperus acuminatus Herbert L. Mason and Verne Grant 1946-8-6 12969 Colusa pond 2.7 mi. n. Colusa (between Sacramento R. and Butte Creek); Butte Sink Comment
  CHSC94416  Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS30814  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 mi. w. Williams 30 Comment
  JEPS64066  Cyperus difformis W. L. Jepson 1929-10-1 15343 Colusa Maxwell 25 Comment
  UC1100541  Cyperus difformis Malcolm A. Nobs and S. Galen Smith 1949-9-9 1877 Colusa 3 mi. w. Williams Comment
  UC1100547  Cyperus difformis Herbert L. Mason and Verne Grant 1946-8-7 12983 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink Comment
  UCD141014  Cyperus difformis P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  UCD141015  Cyperus difformis P. B. Kennedy 1922-5-30 s.n. Colusa Cortena. Comment
  CDA38928  Cyperus difformis J. T. Howell 1944-7-18 19838 Colusa 3 miles west of Williams. Comment
  UCD141020  Cyperus difformis June McCaskill 1954-8-9 362 Colusa ca. 2 mi. east of Princeton and 400 yds. south of Glenn County line. Comment
  CHSC94430  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1100534  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-7 12982 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink Comment
  CHSC115629  Cyperus eragrostis David Isle; Rhonda Isle 2014-9-27 2141 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  POM313066  Cyperus strigosus S. Galen Smith 1949-9-9 1871 Colusa Rice fields 3 miles west of Williams Comment
  JEPS120794  Cypselea humifusa Lowell Ahart 2013-10-1 19073 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
  UC1100151  Damasonium californicum Herbert L. Mason 1946-8-6 12959 Colusa 4 mi. s. Colusa (pond on Colusa-Marysville Hwy., w. side Sacramento R.) Comment
  UC194964  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Colusa Sacramento Valley, Colusa Comment
  CAS-BOT-BC445505  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after passed the Wilbur Springs road. Along Bear Creek Comment
  POM208489  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Sacramento Valley. 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
  JEPS80385  Danthonia unispicata L. R. Heckard and J. Hickman 1981-6-22 5618 Colusa Dark Hollow Creek Snow Mt. (meadow) 1889 Comment
  JEPS108890  Datisca glomerata Lowell Ahart 2006-8-9 13146 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  SBBG119887  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  CDA20254  Datisca glomerata G. D. Barbe, Nola Parmer 1982-6-4 3636 A Colusa North Coast Ranges; Goat Mountain Road 8.7 mi w of Ladoga-Stonyford Rd, along Little Stony Creek, 1.2 mi w of Little Stony Creek bridge. Stonyford Ranger District, Mendocino National Forest. 0 Comment
  JEPS120797  Datura stramonium var. tatula Lowell Ahart 2013-10-1 19083 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  JEPS120992  Daucus pusillus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  UCD38811  Daucus pusillus Beecher Crampton 1958-5-19 4797 Colusa 10.1 miles southeast of Leesville. Comment
  UCD57059  Daucus pusillus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3653 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  UC1096411  Delphinium antoninum Helen K. Sharsmith 1956-6-30 4404 Colusa Linger Longer Camp Inner North Coast Ranges, Mendocino National Forest, Goat Mo 1584 Comment
  UCD163887  Delphinium hesperium Craig D. Thomsen 2002-4-12 2439 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
  HSC47510  Delphinium hesperium Sheila Logan 1978-4-21 52 Colusa N of Bear Valley Rd. Comment
  UCD95852  Delphinium hesperium June McCaskill 1962-5-2 652 Colusa On road along Bear Creek from State Highway 20 north to Leesville, 7 miles north of Wilbur Springs turnoff. Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC83252  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley. Comment
  UC1607881  Delphinium hesperium subsp. pallescens C. G. Nast 1936-4-17 144 Colusa Williams to Lake county Highway Comment
  UCD64411  Delphinium hesperium subsp. pallescens Craig D. Thomsen 2000-4-12 2138 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR261658  Delphinium hesperium subsp. pallescens Ann Howald 2003-4-23 2308 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 1 mile west of intersection with Lodoga-Stonyford Road 400 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
  HSC85787  Delphinium nudicaule Tim Tilgham, Rob Marheine, Bruce Delgado 10 Apr [year missing] Colusa N side of Bartlett Springs Rd. Comment
  CHSC69829  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
  SFV1292  Delphinium variegatum B. J. McCaskill 1962-5-2 651 Colusa On road along Bear Creek from State Highway 20 north to Leesville. 3.6 miles north of Wilbur Springs turnoff. About 200 yards west of road. Comment
  HSC95711  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa 9.8 mi. N of Hwy. 20 on Bear Valley Rd., 0.5 mi. into field on E side of rd. Comment
  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
  UCD23391  Delphinium variegatum Robert E. Rolley 1977-5-8 23 Colusa Erect perennial herb, 10-30 cm tall, roots shallow and woody, leaves mostly basal, some are red edged. Leaves and stems covered by many short hairs. Flowers deep purple, upper petal white edged, spurred. Valley grassland. Dry, sunny, flat field. 9.5 miles north on Bear Valley Road from Highway 20. Comment
  UCD82702  Delphinium variegatum Robin McMaster 1973-4-15 357 Colusa Walker Ridge Hunting Access. Comment
  CAS-BOT-BC16958  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1926-4-23 6582 Colusa field 2 miles from Stonyford Comment
  POM270792  Delphinium variegatum subsp. variegatum Lyman Benson 1935-3-27 6330 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  UCD61143  Deschampsia cespitosa Freed W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys. Comment
  JEPS80431  Deschampsia cespitosa subsp. cespitosa L. R. Heckard 1974-9-9 3867 Colusa just n.e. of rocky promontory s.e. of Foutch Camp (Snow Mt.); Snow Mt. 1920 Comment
  CAS-BOT-BC192669  Deschampsia danthonioides L. R. Abrams 1928-5-8 12591 Colusa 2 miles south of Arbuckle Comment
  CAS-BOT-BC192671  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  JEPS80182  Deschampsia danthonioides L. R. Heckard with J. Hickman 1980-7-3 5334 Colusa ca. 10 mi. w. Stonyford (just w. of Summit Springs, s.w. Snow Mt.); Colusa-Lake Co. Boundary 1548 Comment
  RSA10441  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa Sacramento Valley. 3 mi. south of Arbuckle Comment
  UC188868  Deschampsia danthonioides Miss M. Alice King 1905-1 Colusa near College City College City; Sacramento Valley Comment
  SEINET10524178  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles east of Williams. Alkali plains. Comment
  SEINET10909286  Deschampsia danthonioides Roland McKee 1918-5-1 McKee s.n. Colusa Princeton. Comment
  JEPS75036  Deschampsia elongata L. R. Heckard 1972-7-10 3109 Colusa Trout Creek crossing of trail to Box Spring (Snow Mt.); Snow Mt. 1828 Comment
  JEPS75873  Deschampsia elongata L. R. Heckard 1974-9-9 3848 Colusa just s.e. of Foutch Camp (Snow Mt.); Snow Mt. 1920 Comment
  UC1950419  Deschampsia elongata Barbara Ertter 1989-7-1 8609 Colusa road to Goat Mt Lookout 1.7 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford; NE-facing slope Comment
  UC1051506  Dicentra chrysantha Helen K. Sharsmith 1953-6-19 4277 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  CAS-BOT-BC500074  Dichelostemma capitatum Roxana S. Ferris 1917-4-12 521 Colusa 4 mi east of Williams. Alkali Plains. Comment
  CHSC58244  Dichelostemma capitatum subsp. capitatum Dave Read 1975-4-20 13 Colusa Bear Valley, 8.7 miles north of State Highway 20 on Bear Valley Road. 411 Comment
  HSC45714  Dichelostemma capitatum subsp. capitatum Sheila Logan 1978-4-2 69 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA262386  Dichelostemma capitatum subsp. capitatum Elaine J. Imada 1971-4-10 10 Colusa Ca 3 miles N of Yolo Co line on Hwy 16. Comment
  SD72213  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa Between Williams and Clear Lake, Highway 20. Coastal valley hills. 152 Comment
  UC1733760  Dichelostemma volubile Kay H. Beach 1940-5-16 1260 Colusa Colusa and Lake county line Comment
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CAS-BOT-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
  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
  LA8596  Digitaria sanguinalis H. S. Yates; 1936-8-14 6138 Colusa 3 mi. S of Grimes 15 Comment
  CAS-BOT-BC152171  Diplacus bolanderi A. A. Heller 1940-6-7 15720 Colusa Slope below the road on the Lodogo-Sites Road near the passing into low ground east of Lodogo Comment
  CHSC86525  Diplacus douglasii B. Castro 2003-3-18 1389 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  CAS-BOT-BC208649  Distichlis spicata Roxana S. Ferris 1926-4-22 6291 Colusa 3 miles west of Colusa Comment
  CAS-BOT-BC208650  Distichlis spicata Roxana Stinchfield 1916-6-17 280 Colusa Alkali at Tule near College City Comment
  CAS-BOT-BC208652  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  CHSC29761  Distichlis spicata K. R. Stern 1980-6-30 6647 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS123889  Distichlis spicata Lowell Ahart 2015-4-28 20116 Colusa About 5 1/2 miles east of Maxwell. Comment
  UCD64555  Distichlis spicata A. A. Beetle 1942-5-21 3270 Colusa 12 miles north of Williams. Comment
  CDA32963  Distichlis spicata Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  UCD64488  Distichlis spicata var. stricta K. Esau; D. Hartmann 1941-7-17 Colusa West of Williams. Comment
  CAS-BOT-BC433232  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  CHSC87159  Dodecatheon hendersonii Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 Comment
  RSA0060085  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
  UC1613493  Dodecatheon hendersonii Charles M. Belshaw 1937-4-25 2852 Colusa Vicinity of Cook's Spring Devil's Ridge, Inner North Coast Range Comment
  UCD112600  Dodecatheon hendersonii Christopher Mallek 2008-4-17 WR2- 5 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD56911  Dodecatheon hendersonii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3514 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD118842  Dodecatheon hendersonii subsp. hendersonii Victor Duran 1933-4-3 3378 Colusa Stonyford. 304 Comment
  CHSC29749  Downingia bella K. R. Stern 1980-6-1 6638 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 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
  JEPS5039  Downingia insignis Alice King Apr 1906 Colusa College City Comment
  POM59146  Downingia insignis A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near Colusa. Comment
  UC1001281  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa City College Comment
  UCD18837  Downingia insignis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 144 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
  UCD55041  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa Three miles east of Maxwell. 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
  CAS-BOT-BC159697  Drymocallis glandulosa var. glandulosa H. H. Keifer 1928-5-2 s.n. Colusa North Peak, Marysville Buttes Comment
  UCD81726  Dudleya cymosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5729 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  JEPS120799  Dysphania ambrosioides Lowell Ahart 2013-10-1 19088 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
  CHSC94317  Dysphania botrys Lowell Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS120637  Dysphania botrys Lowell Ahart 2013-10-1 19087 Colusa Strand of East Park Reservoir, about 2.5 air miles southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 air miles northwest of Sites. Comment
  CAS-BOT-BC242662  Echinochloa crus-galli Beecher Crampton 1963-9-9 6890 Colusa 1/4 mile east of Cortena Comment
  SACT001042  Echinochloa crus-galli Malcolm Nobs, S. Smith 1949-9-9 Colusa Rice fields, 3 miles west of Williams. Comment
  SEINET241778 Image available Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 a Colusa 4.5 miles south of Grimes Comment
  UCD34847  Echinochloa crus-galli Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCD60898  Echinochloa crus-galli K. Esau and D. Hartman 1941-7-17 Colusa Near Williams. Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CDA1985  Echinochloa muricata E. A. Biondi 1972-1 Colusa Colusa. 0 Comment
  UCD61064  Echinochloa muricata P. B. Kennedy 30-31 May 1922 Colusa Colusa. Comment
  CAS-BOT-BC197272  Echinochloa muricata var. microstachya Roxana Stinchfield 1916-7-11 472 Colusa Davis tule near Sycamore Slough Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. Comment
  UCD61167  Echinochloa oryzicola P. B. Kennedy 1925-9-18 Colusa Rice Station, Cortena. Comment
  CHSC84967  Echinodorus berteroi Lowell Ahart 2003-10-23 10671 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC1100140  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-8-6 12971 Colusa pond 2.7 mi. n. of Colusa (between Sacramento R. and Butte Creek) Comment
  CDA19006  Echinodorus berteroi R. Breckenridge 2000-9-25 PDR 958948 Colusa East Park Reservoir, vicinity of Stonyford. 0 Comment
  UCD38843  Echinodorus berteroi Beecher Crampton 1958-6-27 4983 Colusa Colusa County; five miles south of Colusa. Comment
  UC1192126  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa below causeway over Butte Sink spillway, e bank of Sacramento River, 1 mi n Colusa; Sacramento River, Butte Sink spillway Comment
  CAS-BOT-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
  UCD110439  Elatine ambigua June McCaskill 1954-8-9 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UCD66936  Elatine rubella Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5085 -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. Dunsfield Flat stock pond. 628 Comment
  CAS-BOT-BC113366  Eleocharis engelmannii Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-9-9 1878 Colusa Rice fields 3 miles west of Williams. Comment
  CHSC79857  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  POM198509  Eleocharis palustris Roxana Stinchfield 1916-7-11 453 Colusa Colusa - Williams Road at Trough 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
  SEINET10564646  Elymus elymoides A. Arthur Heller 1916-6-6 Heller 12357 Colusa Coast range on the grade about 3 miles west of Leesville in the oak and digger pine belt on open gravelly slopes. Scrub oak, Heteromeles, & Toxicodendron are common shrubs. Comment
  JEPS75852  Elymus elymoides subsp. elymoides L. R. Heckard 1974-9-10 3896 Colusa East Peak Snow Mt. (e slope) 2103 Comment
  CAS-BOT-BC247093  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
  JEPS80218  Elymus multisetus L. R. Heckard and J. Hickman 1980-7-3 5374 Colusa slope above Summit Springs (sw slope of mt.); Snow Mt. 1554 Comment
  UCD62453  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa Grade about 3 miles west of Leesville. Comment
  POM146492  Elymus multisetus A. A. Heller 1916-6-6 12357 Colusa [No locality specified] Comment
  JEPS80444  Elymus trachycaulus L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa slope w Summit Springs; Snow Mt. 1554 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
  UCD62670  Elymus trachycaulus subsp. trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 miles west of Leesville. Comment
  HSC48169  Emmenanthe penduliflora Thomas W. Nelson, Jane P. Nelson 1978-4-29 3933 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  UC1051707  Emmenanthe penduliflora Helen K. Sharsmith 1953-7-1 4406 Colusa Trough Springs Ridge; Inner North Coast Ranges, Mendocino National Forest 609 Comment
  UCD170129  Emmenanthe penduliflora Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  UCD63620  Emmenanthe penduliflora Craig D. Thomsen 2000-6-12 2370 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Between Cache Creek Ridge and Brophy Canyon, about 5 miles south of Hwy 20 and 1.5 miles west of Hwy 16. 321 Comment
  CHSC79516  Emmenanthe penduliflora var. penduliflora B. Castro; L. P. Janeway 2000-5-2 1117 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC94519  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
  UCD55446  Epilobium brachycarpum Ellen Dean; Gordon Harrington 2006-10-6 3271 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UC73325  Epilobium campestre Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD164146  Epilobium ciliatum Craig Thomsen 1997-6-21 1931 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  JEPS75845  Epilobium ciliatum subsp. glandulosum L. R. Heckard 1974-9-10 3912 Colusa seep-stream area on ne slope of peak Snow Mt.. West Peak 2011 Comment
  RSA724966  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  CHSC113048  Epilobium densiflorum Lowell Ahart 2013-10-1 19102 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS75736  Epilobium densiflorum L. R. Heckard 1974-9-9 3878 Colusa about 1/4 mi e Foutch Camp 1828 Comment
  UC980843  Epilobium hallianum Kenneth Bradshaw 1953-9-9 Colusa near Board Camp Ridge (w Colusa Co.); Mendocino National Forest, Summit Valley 1676 Comment
  CHSC27709  Epilobium minutum Tim Spira; Robert A. Schlising 1978-5-13 3232 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC91051  Epilobium minutum D. Isle 2003-6-12 365 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt.--meadow 1/4 mi. below road N80 E from jct. of Rd. to Goat Mt. lookout and Horse Glade Rd. GPS: 10S 0524032E 4346780N. 1645 Comment
  JEPS94775  Epilobium minutum Vernon Oswald and Lowell Ahart 1998-5-7 9005 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
  JEPS80190  Epilobium torreyi L. R. Heckard and J. Hickman 1980-7-3 5341 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); southwest Snow Mt. 1548 Comment
  CDA15465  Epipactis gigantea G. F. Hrusa, WTD 1998-6-19 14602 Colusa North Coast Ranges; Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  JEPS110233  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD70303  Equisetum laevigatum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Serpentine riparian alder forests (Alnus rhombifolia) growing on alluvial sands at Stoney Creek. 420 Comment
  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
  RSA129661  Eragrostis hypnoides H. S. Yates 1936-8-14 6139 Colusa 3 miles S. of Grimes 15 Comment
  SD262162  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Sacramento Valley Foothills: west side East Park Reservoir, 0.3 mile south of boatlaunch. Drying lake bed, c 100 yds east of normal lake edge. 49 Comment
  JEPS80252  Eremocarpus setiger L. R. Heckard and J. Hickman 1980-9-15 5431 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  CAS-BOT-BC479710  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.1 mi N of Lodoga, near shore of reservoir 370 Comment
  UCR261751  Eriastrum abramsii Ann Howald 2003-5-29 2350 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
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Dec 15 2016
  CAS-BOT-BC515192  Eriastrum tracyi Volney Rattan 1881-6-1 s.n. Colusa Stony Creek. Coast Mountains north of San Francisco Bay Comment
  CHSC62837  Ericameria linearifolia Vernon H. Oswald; Lowell Ahart 1994-3-23 6019 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Along road. 505 Comment
  HSC85780  Ericameria linearifolia Jeff Dunk, Tallchief Comet, David Munger 1987-4-11 58 Colusa 1.4 mi. E of Blue Oak Campground on Walker Ridge Rd. off Hwy. 20 Comment
  JEPS31350  Ericameria linearifolia W. L. Jepson 1932-5-9 16294 Colusa n of Stonyford 365 Comment
  RSA14917  Ericameria linearifolia L. S. Rose 1934-3-13 34054 Colusa 2 miles E Clayton. Comment
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Jul 30 2014
  JEPS26165  Ericameria nauseosa var. speciosa Peter H. Raven, R. Snow 1959-9-11 14416 Colusa 0.5 mi s of Snow Mountain 1920 Comment
  SEINET251843  Erigeron L. Shultz, J. Shultz 1986-9-20 10226 Colusa 10 miles west of Colusa on Highway 20 Comment
  CHSC94392  Erigeron bonariensis Lowell Ahart 2006-8-22 13225 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  CHSC77302  Erigeron sumatrensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 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
  UC2042511  Eriodictyon californicum Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 4.4 miles N from its intersection with Highway 20. Comment
  UCD58169  Eriodictyon californicum Gordon Harrington 2007-5-15 59 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
  UCR196318  Eriodictyon californicum Mark A. Elvin, D. Isle, Mark S. Brunell 2006-8-3 4995 Colusa Northern Inner Coast Ranges, Mendocino National Forest, east face of Snow Mountain, Stony Creek along M10 610 Comment
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  JEPS110262  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS120713  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Near a small drainage, north of the wash and State Highway 20, just east of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  RSA0118881  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 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
  SEINET8043934 Image available Eriogonum dasyanthemum Ann Howald 2003-1 2353 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground. 378 Comment
  UCD63025  Eriogonum dasyanthemum Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. 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 northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 513 Comment
  UCD63122  Eriogonum dasyanthemum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4952 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  UCD82736  Eriogonum dasyanthemum Craig Thomsen; G. Harrington 2009-5-14 2917 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  UCR261730  Eriogonum dasyanthemum Ann Howald 2003-5-29 2353 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  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
  CDA22487  Eriogonum dasyanthemum D. Brown 1973-10-19 Colusa Sand Creek, ca. 6 miles west of Arbuckle. 0 Comment
  RSA279686  Eriogonum dasyanthemum James L. Reveal 1975-7-27 3902 Colusa Along the Leesville Road west of Williams, on a steep road grade about 3.2 miles southeast of Leesville, and about 1 mile below the summit of the grade Comment
  RSA488801  Eriogonum dasyanthemum James L. Reveal 1988-6-2 6985 Colusa Walker Ridge Road along Lake County line, 3.3 miles north of the turnoff to Jordan Valley Dam and 0.2 mile south of the summit of the road, about 9 miles north of California Highway 20 and 7 miles south of the Bartlett Springs Road 1082 Comment
  UC1299724  Eriogonum dasyanthemum Freed W. Hoffman 1947-6-19 1654 Colusa near Wilbur Springs Comment
  UCD69100  Eriogonum dasyanthemum P. Rodriguez-Rojo 1997-7-25 Colusa Walker Ridge Rd. On disturbed serpentine soils. UTM: 10SEP4425 890 Comment
  JEPS73500  Eriogonum luteolum var. luteolum L. R. Heckard 1972-7-10 3118 Colusa trail to Box Springs near Trout Creek crossing; Snow Mt., Trout Creek 1828 Comment
  CAS-BOT-BC270982  Eriogonum nervulosum G. L. Stebbins 1966-6-6 6433 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stonyford 609 Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  CHSC76345  Eriogonum nudum var. auriculatum L. P. Janeway; B. Castro 1999-7-5 6501 Colusa Along Goat Mountain Road on north side of Little Stony Creek, 0.1 mi east of Sullivan Creek and 1.2 mi southwest of Digger Pine Campground. Road edge. 475 Comment
  CHSC75622  Eriogonum nudum var. nudum Vernon H. Oswald; Lowell Ahart 1999-6-22 9771 Colusa Fouts Spring Rd. (M10) 6.1 mi west of Stonyford-Elk Creek Rd. 548 Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  UCR88379  Eriogonum nudum var. nudum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 Comment
  RSA133246  Eriogonum spergulinum var. reddingianum Peter H. Raven, Richard Snow 1959-9-11 14419 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  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
  SBBG83902  Eriogonum tripodum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  CAS-BOT-BC267476  Eriogonum umbellatum Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5032 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp 1989 Comment
  JEPS80278  Eriogonum umbellatum var. bahiiforme L. R. Heckard, and J. Hickman 1980-9-16 5464 Colusa n slope of West Peak, Snow Mt. Snow Mt., West Peak 2042 Comment
  UCR261723  Eriogonum umbellatum var. smallianum Ann Howald 2003-5-30 2357 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  UCD66997  Eriogonum wrightii var. trachygonum Gordon Harrington 2008-8-14 80 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 junction. Just south of the Brophy Creek - Bear Creek confluence on the east side of Bear Creek (west side of Hwy 16). North side of gravel turn-out. 210 Comment
  CAS-BOT-BC308098  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CHSC94882  Eriophyllum lanatum var. achilleoides Lowell Ahart 2006-6-11 12674 Colusa On the east side of an off road trail (Trail 30), about 50 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  RSA755891  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCR233439  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2011-4-1 17127 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 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
  RSA60339  Eriophyllum lanatum var. achilleoides G. R. Campbell 1948-6-18 651 Colusa 2 miles south of Wilbur Springs Comment
  UCD132205  Eriophyllum lanatum var. achilleoides Ted C. MacRae 1994-4-30 940430 -1 Colusa 1-1.5 miles northeast of junction of Hwys 20 and 16 along Bear Creek. Comment
  CAS-BOT-BC301383  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1926-4-23 6411 Colusa On grade beyond Mountain House on Williams--Stonyford Road Comment
  UCD70241  Eriophyllum lanatum var. grandiflorum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCR212363  Erodium cicutarium Craig D. Thomsen 2000-3-31 2083 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UCD82579  Eryngium aristulatum Craig Thomsen 2008-6-12 2769 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  UC21016  Eryngium aristulatum var. aristulatum J. Burtt Davy 1898-5-1 4300 Colusa near Willows Comment
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Sep 15 2014
  UCD61476  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch. Just west of the Hwy 20-Hwy 16 intersection, about 300 feet uphill to the west of the corral. 326 Comment
  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
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  CAS-BOT-BC40754  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. 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
  SEINET9356866  Erysimum capitatum Unknown 1993-5-2 10856 Colusa Common on open, dry, S facing slopes at mouth of Frenzel Creek, tributary of Little Stony Creek. Comment
  CHSC75599  Erysimum capitatum var. capitatum Vernon H. Oswald; Lowell Ahart 1999-6-22 9776 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Adjacent to meadow at the Lily Pond. 1243 Comment
  UCD81855  Erysimum capitatum var. capitatum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5739 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
  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
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  UCR206723  Eschscholzia George K. Helmkamp, E. A. Helmkamp 2009-3-17 14393 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
  HSC62925  Eschscholzia caespitosa Marla J. Carollo 1979-4-14 36 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20 412 Comment
  HSC72147  Eschscholzia caespitosa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9560 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD82626  Eschscholzia caespitosa Craig Thomsen; G. Harrington 2009-5-12 2896 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  RSA388342  Eschscholzia caespitosa subsp. caespitosa Harold Grams 1975-4-12 5 Colusa State Highway 16, 16 miles north of Rumsey Comment
  JEPS51725  Eschscholzia californica Alice King June 1906 Colusa College City 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
  UCD93924  Eschscholzia californica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CAS-BOT-BC402977  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC5881  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  RSA590194  Eschscholzia californica subsp. californica Michael A. Vincent, Robert Rhode 1996-3-30 7295 Colusa Along Bear Valley Road, 7.1 miles north of junction with Wilbur Springs Road. Comment
  CAS-BOT-BC5880  Eschscholzia caruifolia Mary Katherine (Mrs.) Brandegee 1889-4-1 s.n. Colusa Leesville Comment
  SEINET8523003  Eucalyptus globulus Kelly W. Allred 2006-1 Colusa Along I-5 south of Maxwell, road side rest stop 26 Comment
  CHSC78673  Eucalyptus tereticornis L. P. Janeway; B. Castro 2000-5-3 6701 Colusa Sacramento Valley. Along Hwy 99W 0.2 km north of Wadleigh Road; about 3.2 km north of Maxwell. 25 Comment
  CHSC112255  Euphorbia spathulata Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18645 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120975  Euphorbia spathulata Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18645 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
  SEINET4673877  Euphorbia spathulata Richard R. Halse 2013-3-27 8760 Colusa Along State Hwy. 20 just east of the Colusa/Lake county Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53.; 0 558 Comment
  UCD64248  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2050 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD64283  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2105 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  CDA15551  Euthamia occidentalis G. F. Hrusa 1998-10-28 14902 Colusa North Coast Ranges; Little Stony Ck. along Cedar Camp Rd. as it enters cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  CHSC61769  Euthamia occidentalis Vernon H. Oswald 1993-9-1 5889 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N side of Hunters Creek in Tract 44, near the S boundary of the refuge. 22 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
  CHSC111694  Festuca arundinacea David Isle; Rhonda Isle, Justin Isle 1988-5-22 2097 Colusa Middle Fork Stony Creek Watershed. Field S of Pendell home, S of Fouts Springs Rd 18N01 (M10), 2 miles W of Co. Rd. 306 jct. w/Fouts Springs Road. 384 Comment
  JEPS121258  Festuca microstachys var. ciliata Lowell Ahart 2013-5-1 18689 Colusa N of the wash and 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
  JEPS80773  Festuca roemeri L. R. Heckard and J. C. Hickman 1981-7-30 5746 Colusa se side Snow Mt. (Trout Creek Trail) 1661 Comment
  JEPS81290  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5902 Colusa s of Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  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-BC77677  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCD72474  Forestiera pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek. 252 Comment
  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-BC62919  Frangula californica subsp. tomentella C. Hart Merriam 1907-7-23 s.n. Colusa Cook Spgs. Comment
  UCD58175  Frangula californica subsp. tomentella Gordon Harrington 2007-5-31 67 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  CHSC107282  Frankenia salina L. P. Janeway; B. Castro 2011-7-9 10508 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. 54 Comment
  CHSC52632  Frankenia salina James Jokerst 1985-4-24 2495 Colusa Near Lurline Creek. 41 Comment
  CHSC59735  Frankenia salina K. R. Stern 1980-6-30 6652 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  POM135669  Frankenia salina Roxana Stinchfield 1916-6-17 282 Colusa At Tule, College City. Comment
  UCD81898  Frankenia salina G. Harrington 2009-6-18 81 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. S end of Cowboy Camp. E side of Bear Creek. 307 Comment
  SBBG115358  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 Colusa Bear Valley, Bear Valley Rd, Bear Valley Crk 450 Comment
  UC1051743  Fraxinus dipetala Helen K. Sharsmith 1953-6-20 4299 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CAS-BOT-BC223489  Fraxinus latifolia Roxana Stinchfield 1916-7-8 391 Colusa Sycamore Slough 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
  JEPS95500  Fritillaria affinis Vernon H. Oswald and L. Ahart 1994-3-23 6013 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford 518 Comment
  SEINET12058445  Fritillaria atropurpurea M. A. Vincent, Rhode, R. 1996-1 Colusa Comment
  CHSC78108  Fritillaria pluriflora Dwayne Thomas 1999-4-3 22 Colusa Bear Valley Rd. 326 Comment
  UCD163302  Fritillaria pluriflora Craig D. Thomsen 1997-4-7 1893 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  SEINET8478935  Fritillaria pluriflora M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  JEPS15271  Fritillaria purdyi Rimo Bacigalupi with G. L. Stebbins, C. McMillan and Peter Kamb 1950-4-16 3107 Colusa between and above confluence of the North and Middle Forks of Stony Creek, very close to Glenn Co. line, above and n of Red Bridge Camp [Mend. Nat. Forest] Stony Creek; innermost ridges of Inner North Coast Ranges 579 Comment
  JEPS80437  Fritillaria recurva L. R. Heckard and J. Hickman 1980-7-2 5294 A Colusa jus above (ne of) Summit Springs (sw of Snow Mountain, Colusa-Lake County Boundary) 1584 Comment
  CDA14917  Galium andrewsii G. F. Hrusa 1993-5-2 10862 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Above Frenzel Creek, tributary of Little Stony Creek. Comment
  HSC71303  Galium andrewsii Thomas W. Nelson, Jane Nelson 1979-4-12 4623 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD66537  Galium andrewsii Craig D. Thomsen 2001-5-24 2496 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
  JEPS52810  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4357 Colusa 2.7 mi by road ne Lodoga (s-facing roadbank) 396 Comment
  UCD64439  Galium aparine Craig D. Thomsen 2000-3-31 2079 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
  JEPS75835  Galium bolanderi L. R. Heckard 1974-9-11 3952 Colusa along Summit Springs trail Snow Mt. 1798 Comment
  UC1229763  Galium bolanderi Francia Chisaki and Helen K. Sharsmith 1959-5-27 1335 Colusa at Mill Creek Crossing (road leading out of Red Bridge camp) Comment
  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
  JEPS81405  Galium grayanum L. R. Heckard and J. C. Hickman 1982-7-9 6012 Colusa just e lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  JEPS75849  Galium grayanum var. nanum L. R. Heckard 1974-9-10 3898 Colusa top of East Peak Snow Mt.; , top of East Peak 2133 Comment
  CDA15454  Galium murale T. Gantenbein 1999-4-16 PDR 1198688 Colusa Central Valley; north Arbuckle. 0 Comment
  UC1051748  Galium parisiense Helen K. Sharsmith 1953-6-18 4259 Colusa near Fouts Springs (above Mill Creek); Inner North Coast Ranges, Mendocino National Forest 609 Comment
  UC1177932  Galium parisiense Francia Chisaki and Gene B. Newcomb 1958-6-19 1134 Colusa about 3 mi w Stonyford (along path leading to dam); Diversion Dam Camp Comment
  UCD57711  Galium parisiense Daniel Chau; 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. 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
  UCR212309  Galium parisiense Craig D. Thomsen 2000-3-31 2080 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  OBI9920  Galium parisiense Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1334 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  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
  CAS-BOT-BC199030  Garrya congdonii Roxana S. Ferris 1926-4-23 6456 a Colusa Rocky hills between Leesville and Stonyford, 4 mi. from Stonyford Comment
  CAS-BOT-BC199032  Garrya congdonii Milo S. Baker 1947-4-6 11645 Colusa Along Hwy. 20 just E of the Lake-Colusa boundary. Comment
  CHSC39247  Garrya congdonii B. A. Stein 1982-5-2 535 Colusa South end of East park Reservoir. Comment
  UCD121093  Garrya congdonii D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  UCD66545  Gastridium phleoides Beecher Crampton 1958-5-19 4796 Colusa 10.1 miles southeast of Leesville. Comment
  UCD67065  Gastridium ventricosum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 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. 637 Comment
  JEPS80143  Gayophytum diffusum subsp. diffusum L. R. Heckard with J. Hickman 1980-7-2 5304 Colusa trail from Summit Springs to Snow Mt. Peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. boundary) 1676 Comment
  JEPS76800  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  JEPS81279  Geranium carolinianum L. R. Heckard and J. C. Hickman 1982-7-5 5890 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  CHSC101434  Geranium dissectum David Isle 2007-5-1 1575 Colusa SE of Maxwell approx. 4 miles in riparian natural area just W of irrigation canal adjacent to 'Lakeland' rice fields farmed by William Dirks and Jack Barrett. W of footbridge S of third landing. 30 Comment
  UCD57560  Geranium dissectum Stephanie Castle; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek. 304 Comment
  UC1614445  Gilia Charles M. Belshaw 1937-4-25 2834 Colusa vicinity Cook's Spring (Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  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
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley Comment
  JEPS121000  Gilia capitata subsp. capitata Lowell Ahart 2013-5-1 18663 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  HSC71310  Gilia tricolor Thomas W. Nelson, Jane P. Nelson 1979-4-11 4615 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  RSA0118785  Gilia tricolor subsp. diffusa Lowell A. Ahart 2013-5-1 18684 Colusa North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC45716  Githopsis specularioides Sheila Logan 1978-4-22 61 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC113040  Glinus lotoides Lowell Ahart 2013-10-1 19074 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
  UC1563931  Glinus lotoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 Comment
  CAS-BOT-BC434996  Glinus lotoides Roxana Stinchfield 1916-7-9 425 Colusa Along Sacramento River, Phillips Ranch near Sycamore. Comment
  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
  JEPS75841  Gnaphalium palustre L. R. Heckard 1974-9-10 3915 Colusa ne slope of West Peak (Snow Mt., along dry creek bed near seep area); Snow Mt., West Peak 2011 Comment
  UCR227904  Gnaphalium palustre Ellen Dean 2008-6-8 5064 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  POM53845  Grindelia camporum Roxana Stinchfield 1916-6-17 283 Colusa Near Tule - College City. Comment
  CHSC94730  Grindelia camporum var. camporum Lowell Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  UC1051714  Grindelia hirsutula Helen K. Sharsmith 1953-6-19 4264 Colusa near confluence North and Middle Fork Stoney Creek (Red Bridge Camp, North Fork Stoney Creek, Middle Fork Stoney Creek); Inner North Coast Ranges, Mendocino Natl Forest, North- Midd 548 Comment
  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
  JEPS80117  Hackelia amethystina L. R. Heckard with J. Hickman 1980-7-1 5275 Colusa n side of East Peak; Snow Mountain 2072 Comment
  UCD85150  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa 3.5 miles south of Colusa. Comment
  UCD85235  Hainardia cylindrica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CAS-BOT-BC302201  Harmonia hallii G. L. Stebbins 1971-6-6 8013 Colusa South end of Walker Ridge, near Clyde Mine 914 Comment
  JEPS94768  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  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
  UCD159338  Harmonia hallii D. S. Park; E. Dean 2010-6-5 122 Colusa Walker ridge, Cold Spring Mt. Abundant by road. 692 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
  UCD70304  Helenium puberulum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  CHSC84973  Heliotropium curassavicum Lowell Ahart 2003-10-23 10663 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  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
  CAS-BOT-BC306027  Hemizonia congesta subsp. clevelandii A. A. Heller 1916-6-6 12358 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  RSA0115040  Hemizonia congesta subsp. clevelandii Lyman Benson 1948-7-16 12923 Colusa Road between Williams and Clear Lake just east of Lake Co. line. Mt. Range: Inner North Coast. 548 Comment
  SEINET10797452  Hemizonia congesta subsp. clevelandii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 382 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UCR281726  Hemizonia congesta subsp. tracyi David Isle, Frank Pendell 2014-6-16 2136 Colusa North Coast Range, c. 2 miles west of Stonyford on the Pendell Ranch, southeast of the home of Frank and Sheri Pendell c. 0.25 mile and northwest of the Stonyford Cemetary, c. 200 yards 384 Comment
  CHSC115621  Hemizonia congesta subsp. tracyi David Isle; Frank Pendell 2014-6-16 f 2136 Colusa North Coast Range: 2 miles W of Stonyford on Pendell Ranch. SE of Pendell home 1/4 mile; NW of Cemetery 200 yds. (GPS= Pendell home S of Fouts Sp. Rd. 50 yds.); 10S-0536687E, 4357699N). Comment
  UCD82529  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2885 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 710 Comment
  CAS-BOT-BC175981  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  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
  JEPS122888  Hesperolinon californicum Adam C. Schneider with Will Freyman and Yuri P. Springer 2014-5-20 642 Colusa Along north side of Brim Rd east of Indian Valley Reservoir, near Colusa/Lake Co line. Comment
  UCD61439  Hesperolinon californicum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3884 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile NW of parking lot in hills to the west of Bear Creek. 356 Comment
  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
  OBI12550  Hesperolinon californicum Herbert L. Mason 1946-5-31 12815 Colusa Inner North Coast Ranges. One mi E of Lake County line, Bartlett Springs to Williams Rd, W Comment
  CHSC106245  Hesperolinon disjunctum B. Castro; L. P. Janeway 2001-6-3 1258 A 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. 883 Comment
  UC1088845 Image available Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca. 1 mi above Diversion Dam of Big Stoney Creek (near road from Stoneyford to Fouts Springs); Mendocino National Forest; Mendocino National Forest, Colusa Co. 518 Comment
  UC1212480  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-17 4250 Colusa above Wide Awake Mercury Mine (abandoned) (above Wilbur Springs (3 mi w of State Hwy 20)); Inner North Coast Ranges Comment
  CAS-BOT-BC176221  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
  SBBG128806  Hesperolinon disjunctum L. Ahart, J. Dittes, J. Guardino 2013-4-26 18635 Colusa rocky serpentine outcrop on N side of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  SD51665  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa 1.0 mile beyond Wolf Glade on spusr road, drainage of Stoney Creek, Mendocino National Forest. 609 Comment
  UC1212479  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 Colusa 1 mi below Cook Springs; Inner North Coast Ranges 518 Comment
  CHSC111649  Hesperolinon drymarioides David Isle; Geri Hulse-Stephens 1979-6-15 2060 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. NE of junction of Frenzel Creek with Little Stony Creek. 426 Comment
  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
  UC1212306  Hesperolinon drymarioides Freed W. Hoffman 1947-6-19 1616 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UCD81732  Hesperolinon drymarioides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5734 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
  UCD66692  Hesperolinon micranthum Craig D. Thomsen 2000-6-23 2373 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82742  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2923 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  JEPS60199  Heterocodon rariflorum L. R. Heckard 1969-5-28 2235 Colusa about 6 air mi w Stonyford (along Stony Creek at Fout Springs); Stony Creek, Fout Springs 518 Comment
  JEPS2447  Heterotheca oregona var. rudis W. L. Jepson 1887-9-17 14677 Colusa in bed of Putah <Creek> Putah Comment
  UCSC003615  Heuchera micrantha var. pacifica L. Amidon, C. Rutherford 1975-6-5 45 Colusa In shaded rocks of promontory on southeast corner of Snow Mt. overlooking and 3 miles northwest of Fouts Springs. Snow Mountain. Comment
  CHSC32210  Hieracium greenei James Jokerst 1980-8-7 1061 Colusa North Coast Ranges. Near Snow Mountain (west). 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
  UCD163858  Hoita macrostachya Craig D. Thomsen 2001-5-31 2538 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  CAS-BOT-BC320321  Holocarpha virgata A. A. Heller 1940-6-7 15721 Colusa Near the foot of the grade east of Lodogo on the Sites road Comment
  CAS-BOT-BC320319  Holocarpha virgata H. M. Hall 1930-9-25 12893 Colusa About 4 miles south of Arbuckle Comment
  RSA0118629  Holocarpha virgata subsp. virgata Lowell A. Ahart 2013-10-1 19099 Colusa Near strand of East Park Reservoir, about 2 miles (air) southeast of Stonyford, about 3 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 375 Comment
  SEINET10758259  Holocarpha virgata subsp. virgata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 907 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Wolf Creek OHV staging area, off Forest Service route M10, 4.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W. 452 Comment
  UCD20203  Hordeum brachyantherum J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 12.2 miles north of junction of Hwys 20 and 16. Comment
  UCD61443  Hordeum brachyantherum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3888 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1000 ft NW of parking lot. 339 Comment
  JEPS81292  Hordeum brachyantherum subsp. californicum L. R. Heckard and J. C. Hickman 1982-7-5 5904 Colusa s side Snow Mountain (slope below (s of) area, Summit Springs); s side Snow Mountain, Summit Springs 1500 Comment
  UCD162991  Hordeum depressum Craig D. Thomsen 2000-4-28 2182 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  UCD57107  Hordeum depressum Gordon Harrington; Diana Hickson 2007-4-7 0027 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, W of Roadkill Cafe, north of Thompson Creek. 424 Comment
  UCD85754  Hordeum jubatum Freed W. Hoffman 1942-4-23 2254 Colusa Near Maxwell. 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
  CHSC86611  Hordeum marinum subsp. gussoneanum Jenny Marr; Heidi West, Caroline Warren 1998-4-16 Colusa Vicinity of Antelope Valley and Grapevine Creek. 121 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
  SEINET10595754  Hordeum murinum Roxana S. Ferris 1917-4-12 Ferris 515 Colusa 4 miles E of Williams Alkali plains. 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
  CHSC71448  Horkelia californica subsp. dissita Vernon H. Oswald; Lowell Ahart 1998-7-15 9270 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. In a meadow. 487 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
  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
  JEPS80445  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1980-9-15 5422 A Colusa w. of Summit Springs (Snow Mt.); Snow Mt. 1554 Comment
  JEPS80769  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1981-7-30 5737 Colusa s.e. side Snow Mt. (along Trout Creek trail) 1676 Comment
  RSA0013873  Ibicella lutea John H. Thomas 1960-8-29 8847 Colusa About 11 miles SW of Williams along Highway 20. Comment
  CDA15768  Iris macrosiphon G. F. Hrusa 1993-5-2 10853 Colusa North Coast Ranges; Frenzel Creek Research Natural Area - Mendocino National Forest. Lower Frenzel Creek, tributary of Little Stony Creek. Comment
  HSC31612  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  JEPS94211  Iris macrosiphon Vernon Oswald and Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Road 2.2 mi w of Bear Valley Road (0.7 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  JEPS80778  Iris missouriensis L. R. Heckard and J. C. Hickman 1981-7-30 5751 Colusa se side Snow Mt. (Trout Creek trail); , Trout Creek 1615 Comment
  UCD56938  Iva axillaris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3540 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CHSC32202  Ivesia gordonii James Jokerst 1980-8-8 1076 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  CHSC83445  Juncus balticus Bill Maslach 2001-6-6 12 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; 5 meters downstream of bridge marked '1930.' On creek bank. 175 Comment
  CHSC84195  Juncus balticus Lowell Ahart 2003-7-14 10384 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  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
  CHSC49606  Juncus bolanderi Vernon Oswald 1984-7-20 1619 Colusa Letts Lake in Mendocino National Forest. 1402 Comment
  JEPS80247  Juncus bolanderi L. R. Heckard and J. C. Hickman 1980-9-15 5425 Colusa w of Summit Springs; Snow Mt. 1554 Comment
  JEPS121120  Juncus bufonius var. bufonius Lowell Ahart 2013-5-1 18691 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC88538  Juncus bufonius var. congestus B. Castro 2003-5-15 1437 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. At edge of stock pond. 196 Comment
  JEPS80387  Juncus covillei L. R. Heckard and J. Hickman 1981-6-22 5620 Colusa along Dark Hollow Creek Snow Mt. 1889 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
  RSA724953  Juncus ensifolius L. Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  JEPS73444  Juncus howellii L. R. Heckard 1972-7-8 3039 Colusa ridge running se of Snow Mt., West Peak 2011 Comment
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  UCD18851  Juncus mexicanus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 159 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCD61460  Juncus mexicanus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3906 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  JEPS80269  Juncus occidentalis L. R. Heckard, and J. Hickman 1980-9-16 5452 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area, Snow Mt.); Snow Mt. 1981 Comment
  CHSC88579  Juncus oxymeris L. P. Janeway 2001-6-6 7115 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  JEPS106502  Juncus oxymeris L. P. Janeway 2001-6-6 7115 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow 610 Comment
  UCD82125  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5654 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CHSC97128  Juncus usitatus Lowell Ahart 2007-7-7 14258 Colusa South of the wire fence, on the south side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  SBBG119881  Juncus xiphioides L. Ahart 2006-8-9 13145 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  UCD163648  Juncus xiphioides Craig Thomsen 1998-6-19 1944 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  CHSC79433  Juniperus californica B. Castro; L. P. Janeway 2000-5-1 1102 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  POM163455  Juniperus californica Roxana S. Ferris 1926-4-23 6456 Colusa 4 miles from [south of] Stonyford on the Leesville Road Comment
  UCD37190  Juniperus californica Beecher Crampton 1958-5-19 4804 Colusa Colusa County, 1.3 miles south of Lodoga. 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
  CHSC65613  Juniperus occidentalis J. Ingraham 1995-4-13 6 Colusa 1 mi N of Davis Creek on hwy 395, 100 yds. E of junction of Co. Rd. 133B and Hwy 395, 100 yds E. 1487 Comment
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Jul 25 2018
  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
  CHSC32198  Kelloggia galioides James Jokerst 1980-8-8 1083 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UCR261653  Koeleria gerardi Ann Howald 2003-4-24 2321 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, spillway overlook 368 Comment
  UCD164166  Koeleria macrantha Craig Thomsen 2001-5-6 2558 Colusa Wilbur Hot Springs. 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
  UC33049  Lactuca serriola J. Burtt Davy 1898-5-1 4275 Colusa near Willows Comment
  CHSC27635  Lagophylla minor Timothy Spira; Robert Schlising 1978-5-13 3240 Colusa Just E of Lake County line, along Hwy 20. Comment
  HSC96892  Lagophylla minor L. Ahart 2006-6-11 12667 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS19942  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge betw. Venado and Leesville Comment
  UC596300  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge between Venado and Leesville Comment
  UCD57827  Lagophylla minor Gordon Harrington 2007-4-17 36 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. 567 Comment
  UCD66601  Lagophylla minor Craig D. Thomsen 2000-5-11 2276 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82162  Lagophylla minor Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5694 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  JEPS38990  Lagophylla minor W. L. Jepson 1938-6-9 18959 Colusa mts. betw. Indian Valley (Lake Co.) and Bear Valley (Colusa Co.) 579 Comment
  JEPS80244  Lagophylla ramosissima L. R. Heckard and J. Hickman 1980-9-15 5419 Colusa slopes w of Summit Springs; Snow Mt. 1554 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
  CHSC77734  Lasthenia californica B. Castro 1999-4-12 Colusa About 9 air miles NW of Maxwell, vicinity of Peterson Rd and Logan Ridge. 100 Comment
  HSC48034  Lasthenia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3939 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC353480  Lasthenia fremontii A. A. Heller 1921-4-10 13546 Colusa Near Colusa Comment
  SD225735  Lasthenia fremontii Carol Witham, Jennifer Buck 2001-4-30 146 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001. Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites Comment
  CAS-BOT-BC353479  Lasthenia fremontii Mrs. Alvin Seale 1932-4-17 s.n. Colusa unspecified Comment
  HSC83436  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi N of jct with State Hwy 20 366 Comment
  UCD133750  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa On west side of Bear Valley Road, 11 miles (by road) north of junction with State Highway 20. 365 Comment
  CHSC29752  Lasthenia glabrata K. R. Stern 1980-4-1 6619 Colusa Vernal pool, south border area of Delevan National Wildlife Refuge. 48 Comment
  CHSC8124  Lasthenia glabrata J. G. Moore 1969-4-12 65 Colusa In orchard 300 yds. s of junction with Hwy. 20 on Hwy. 16, e side of road. 106 Comment
  UCD163703  Lasthenia glabrata Craig Thomsen 1999-5-10 2015 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  HSC72114  Lasthenia glabrata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9529 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  CAS-BOT-BC328109  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1917-4-12 503 Colusa 4 miles E of Williams Comment
  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
  HSC92634  Lasthenia glabrata subsp. glabrata Eric B. Peterson, Thomas Ward, Matt Foruria 1995-4-1 55 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  RSA293117  Lasthenia glabrata subsp. glabrata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9529 Colusa Bear Valley Road, 5 miles from its junction with State Route 20. 390 Comment
  SEINET7062981  Lasthenia glabrata subsp. glabrata A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 mile south of Route 20 and near Bear Creek. UTM Zone 10, 555654mE, 4318071mN. (WGS84/NAD83). 320 Comment
  UC583164  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi nw Rumsey 304 Comment
  UCR212333  Lasthenia glabrata subsp. glabrata Craig D. Thomsen 2000-3-31 2046 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UC71630  Lasthenia gracilis Miss Alice King 1905-1-1 Colusa College City Comment
  UCD64253  Lasthenia gracilis Craig D. Thomsen 2000-3-31 2054 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
  CHSC53935  Lasthenia minor Vernon H. Oswald 1991-4-21 4527 Colusa Four Mile Rd, 3.1 mi south of Norman Rd, west-southwest of Princeton. Along the edge of the road. 27 Comment
  CHSC116580  Lathyrus jepsonii B. Castro; Tom Boullion 2015-6-15 17336 /4/20 Colusa Sacramento Valley. CA 5 air mi N of colusa, ca 0.5 mi E of Hwy 45 off N edge of Reservation Road. On upper terrace within levee, overlooking a riprap-lined bend in the Sacramento Rier (Rivermile ~154.3). 16 Comment
  UCD81710  Lathyrus jepsonii var. californicus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5716 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  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
  CAS-BOT-BC323903  Layia chrysanthemoides Roxana S. Ferris 1926-4-23 6404 Colusa Roadside near Mountain House on Williams-Stonyford Road Comment
  CDA11406  Layia chrysanthemoides G. F. Hrusa, K. van Katwyk 1995-4-22 12127 Colusa Inner North Coast Ranges; Bear Valley, 15 m. N of Hwy. 20. 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
  HSC92628  Layia chrysanthemoides Eric B. Peterson, Thomas Ward, Matt Foruria 1995-4-1 54 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 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
  UC761874  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  HSC62779  Layia chrysanthemoides Thomas Wood 1979-4-14 109 Colusa Bear Valley 396 Comment
  UCR37887  Layia chrysanthemoides subsp. chrysanthemoides C. G. Phillips, L. Cole, SA. Haultain, K. B. Barrows 1984-4-29 32 Colusa Bear Valley road Comment
  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
  HSC92539  Layia platyglossa S. Morrissette, J. Williams, K. Kopper 1994-4-24 23 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  UCD15426  Layia platyglossa Margit Sands 1985-4-13 29 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  CDA8151  Layia platyglossa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  SEINET11447842 Image available Layia platyglossa M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  UCD82338  Layia platyglossa Robin McMaster 1973-4-15 324 Colusa 100 yd from junction of Hwys 16 and 25, next to Bear Valley Creek. Comment
  CAS-BOT-BC329323  Layia septentrionalis James Jokerst 1985-4-10 2227 Colusa Near Walker Ridge. 547 Comment
  CHSC91515  Layia septentrionalis D. Isle 1995-4-30 391 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt. Rd. (Little Stony Rd.), 5.1 mi. out from jct. with Stonyford-Lodoga Rd. and just W of Sullivan Creek Bridge. 487 Comment
  RSA60887  Layia septentrionalis Frank W. Gould 1938-4-22 282 Colusa Head of Capay Valley, west of Arbuckle. 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
  UC1100313  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank of Sacramento River, Butte Sink); Sacramento River, Butte Sink Comment
  CAS-BOT-BC527264  Lemna gibba A. A. Heller; H. E. Brown 1902-5-19 5571 Colusa Near Colusa Comment
  JEPS127105  Lemna minuta Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20723 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  CHSC61120  Lemna turionifera Vernon H. Oswald 1993-6-23 5570 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, near the SE corner of Cell 2, Pool 10. Along the edge of a marsh. 21 Comment
  CAS-BOT-BC534910  Lemna turionifera Verne Grant; Herbert L. Mason 1946-8-6 12966 Colusa Pond on Colusa-Marysville Highway, four miles south of Colusa, west side Sacramento River Comment
  CAS-BOT-BC88675  Lepidium acutidens A. A. Heller 1921-4-10 13542 Colusa Near Colusa. Comment
  CHSC79711  Lepidium dictyotum var. dictyotum L. P. Janeway; B. Castro 2000-3-23 6635 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  JEPS95512  Lepidium dictyotum var. dictyotum Vernon H. Oswald and L. Ahart 1994-4-6 6074 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
  CHSC101071  Lepidium draba David W. Isle 2007-4-13 1633 Colusa East of Maxwell about 1 mile; south of Maxwell Rd. and east of Lyons Rd. in ditch between rice field east of Williams Dirk's shop. 30 Comment
  HSC72170  Lepidium lasiocarpum 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
  CHSC91136  Lepidium latifolium D. Isle 1997-7-31 333 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. 3 mi. S of jct. Bartlett Springs/Bear Valley Rd. 304 Comment
  SD236244  Lepidium latifolium G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14257 Colusa Sacramento Valley; along River Road (generally following the Sacramento River), 1.1 miles north of Colusa (Meridian 7.5'Q) 17 Comment
  SEINET1908437  Lepidium latifolium G. K. Helmkamp, E. A. Helmkamp 2008-1 14257 Colusa Sacramento Valley: along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SEINET2033409 Image available Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2008-1 14257 Colusa Sacramento Valley; along River Road (generally following the Sacramento River), 1.1 miles north of Colusa (Meridian 7.5' Q.: 39 deg. 13'33''N, 121 deg. 59'43''W, +/- 1000m). 18 Comment
  CDA24916  Lepidium latipes D. Brown 1977-5-5 Colusa Terhel Farms Inc., Williams. 0 Comment
  UC10646  Lepidium latipes J. Burtt Davy May 1898 Colusa near Willows Comment
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Sep 15 2014
  UC398784  Lepidium latipes Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC89761  Lepidium latipes Brandegee s.n. Colusa Unspecified. Comment
  CHSC112923  Lepidium latipes var. latipes B. Castro; L. Janeway, Robin Carter 2010-3-23 1802 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal, in disturbed, grazed annual grassland. 120 Comment
  CHSC79001  Lepidium latipes var. latipes J. Marr; C. Warren, H. West, N. Wight, et al 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine/Funks Creeks. 121 Comment
  CAS-BOT-BC89888  Lepidium nitidum Roxana S. Ferris 1917-4-12 719 Colusa 4 miles east of Williams. Comment
  UCD57342  Lepidium nitidum Sergio Testa 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  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
  CHSC25167  Leptosiphon acicularis Willis Ball 1970-4-4 96 Colusa 10 miles W. of Williams. Beside Highway 20. 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
  HSC83341  Leptosiphon bicolor Clinton C. Shock 1980-5-3 57 Colusa Bear Valley, 12 mi. N of Hwy. 20 384 Comment
  HSC83422  Leptosiphon bicolor C. Pauls 1975-4-20 8 Colusa Bear Valley Rd., 8.7 mi. N of Hwy. 20 Comment
  RSA424704B  Leptosiphon bicolor Aaron Liston, M. A. Blumler 1987-4-26 667 -6 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  HSC85856  Leptosiphon bicolor Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  HSC85934  Leptosiphon bicolor Michalski, Raum, Hopson 1987-4-12 61 Colusa Side of Leesville-Williams Rd. Comment
  CHSC23879  Leptosiphon ciliatus G. E. Bowen 1971-3-27 11 Colusa 11 mi. w of Williams, n side of road, about 10 yards. 213 Comment
  POM174562  Leptosiphon ciliatus Roxana S. Ferris 1926-4-23 6430 Colusa Near summit on grade. Williams- Stonyford Road. Comment
  HSC85809  Leptosiphon ciliatus Sandy Floyd, Tom Munton, T'ai Roulston 1987-4-12 95 Colusa Leesville Rd. Comment
  RSA589922  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7291 Colusa Along Bear Valley Rd., 2.5 mi N jct. Wilbur Springs Rd. Comment
  RSA275358  Leptosiphon filipes Thomas W. Nelson, Jane P. Nelson 1978-4-29 3935 Colusa Along Bear Valley Rd. 2.5 miles from junction with State Route 20. 366 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
  UCR261672  Leptosiphon pygmaeus subsp. continentalis Ann Howald 2003-3-26 2294 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  CAS-BOT-BC341799  Lessingia nemaclada T. S. Brandegee 1884-1-1 s.n. Colusa Mountain House Comment
  SD132027  Lessingia nemaclada Barbara Ertter, Neese,Fujii,Espindola 1989-10-21 8868 Colusa Brim Road, southwest of Leesville to Indian Valley Reservoir 609 Comment
  UCD66449  Lessingia nemaclada Craig D. Thomsen 2000-5-11 2295 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC341800  Lessingia nemaclada M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  CAS-BOT-BC341802  Lessingia nemaclada Walter Knight; Irja Knight 1963-9-23 113 Colusa Between Leesville and Wilbur Springs Comment
  CAS-BOT-BC123028  Lessingia ramulosa M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  JEPS94888  Lessingia ramulosa Vernon H. Oswald and Lowell Ahart 1998-7-15 9276 Colusa w side of county on Sawtelle Valley Road 0.4 mi n of Bartlett Springs Road; Sawtelle Valley Road 670 Comment
  RSA758207  Lessingia ramulosa Doug Goldman 2005-7-23 3569 Colusa East side of Wilbur Springs Road, about 1.35 miles west of the intersection with Bear Valley Road and just east of Sulphur Creek. Wilbur Springs Resort. 415 Comment
  UC1552844  Lessingia ramulosa Frederica Bowcutt 1985-6-19 604 Colusa about 2 air mi n Wilbur Hot Springs (just sw of Bear Valley); Bear Valley, Wilbur Hot Springs Comment
  UC2014145  Lessingia ramulosa Ellen Dean, C. Thomsen, T. Hansen, windfarm meeting 2010-6-11 6145 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  UCD66698  Lessingia ramulosa Craig D. Thomsen 2000-6-23 2400 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD84559  Lessingia ramulosa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6084 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CHSC71419  Lessingia ramulosa var. adenophora Vernon H. Oswald; Lowell Ahart 1998-7-15 9276 Colusa West side of county on Sawtelle Valley Rd. 0.4 mi north of Bartlett Springs Rd. 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
  JEPS73452  Lewisia triphylla L. R. Heckard 1972-7-8 3052 Colusa n side of ridge running se of Snow Mt. West 2011 Comment
  JEPS80163  Lewisia triphylla L. R. Heckard with J. Hickman 1980-7-2 5314 A Colusa ca. 10 mi w Stonyford (first meadow n of summit of trail from Frog Pond to Milk Ranch; w of Snow Mt. West) 1950 Comment
  UC1299698  Lewisia triphylla Freed W. Hoffman 1947-6-19 1680 Colusa Cooks Spring Comment
  UC38247  Leymus triticoides J. Burtt Davy May, 1898 4290 Colusa near Princeton Comment
  UCD164136  Leymus triticoides Craig Thomsen 1998-6-12 1940 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  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
  JEPS96000  Lilium pardalinum subsp. pardalinum Vernon H. Oswald and L. Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate 426 Comment
  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
  UCD33937  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9168 Colusa Colusa County, 2 miles W.N.W. of Lodoga. Comment
  CHSC112227  Linanthus ciliatus Lowell Ahart 2013-5-1 18668 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC53973  Linanthus dichotomus Vernon H. Oswald 1991-4-21 4519 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  UC907804  Linanthus dichotomus Herbert L. Mason 1941-4-5 12407 Colusa 1 mi s Stonyford Comment
  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
  JEPS74814  Linanthus parviflorus L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-7 4022 Colusa sw of Leesville (just sw of site of old Kowalski ranch (below upper dam road), Upper Indian Valley); Upper Indian Valley 396 Comment
  UCD83812  Linanthus parviflorus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5959 Colusa Walker Ridge, along Walker Road, just N of main turnoff to Barrel Springs. 712 Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  CDA34090  Lithophragma affine P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD102676  Lithophragma campanulatum A. M. Shapiro 1994-6-12 s.n. Colusa Below Steel Trap Rock, vicinity of Goat Mtn. (close by to the south of the rock). 1310 Comment
  HSC92471  Lithophragma heterophyllum Brad Kerstetter, Roxanne Jackson, Jeff Cox 1995-5-6 52 Colusa Blue Oak Campground 549 Comment
  JEPS121108  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa On the N side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UC1614399  Logfia filaginoides Charles M. Belshaw 1937-4-25 2882 Colusa vicinity of Cook's Spring, Devil's Ridge. Inner N coast range Comment
  UCD159333  Logfia filaginoides D. S. Park 2010-6-5 117 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  UCR233445  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  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
  UCD143424  Lomatium Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  CHSC42597  Lomatium californicum Vernon Oswald 1986-6-4 2080 Colusa M10, 0.2 mi w of its jct. with M5. 609 Comment
  UCD80967  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
  UCD82548  Lomatium californicum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5703 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  RSA63650  Lomatium caruifolium Milo S. Baker 1947-4-6 11646 Colusa Colusa County: 1 mile E of Lake - Colusa boundary along hwy 20, Serpentine area Comment
  CDA12080  Lomatium ciliolatum var. hooveri G. F. Hrusa 1989-4-8 5913 Colusa North Coast Biodiversity Arena; Bartlett Springs road immediately to W of Bear Valley, lower slopes of Walker Ridge. Comment
  HSC21551  Lomatium ciliolatum var. hooveri Lincoln Constance 1965-4-13 3756 Colusa Between Clear Lake Oaks and Williams, Hwy. 20, 2.7 mi. W of Hwy. 16 549 Comment
  OBI54946  Lomatium ciliolatum var. hooveri Robert F. Hoover 1941-5-2 4987 Colusa Just E of Lake Co. line on Williams-Clear Lake hwy Comment
  CDA38340  Lomatium ciliolatum var. hooveri T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  HSC60362  Lomatium ciliolatum var. hooveri Phyllis Krieg 1979-4-14 Colusa 1067 Comment
  UC71660  Lomatium dasycarpum subsp. tomentosum Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC478201  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner Coast Ranges: Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 miles northwest of intersection with East Ruby King Road 419 Comment
  CHSC70858  Lomatium hooveri Vernon Oswald; Lowell Ahart 1998-4-21 8943 Colusa Stonyford-Logoda Rd. 3.7 mi south of Stonyford. 384 Comment
  UC1073298  Lomatium hooveri George B. Rossbach 1955-4-9 374 Colusa on Route 20 w. edge Colusa Co. 563 Comment
  UC903739  Lomatium hooveri Milo S. Baker 1947-4-6 11646 Colusa near Hwy. 20 ca. 1 mi. e. Lake-Colusa Co. line Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163312  Lomatium hooveri Craig D. Thomsen 1997-4-18 1901 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD58105  Lomatium hooveri Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3352 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 556 Comment
  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
  HSC72294  Lomatium macrocarpum J. P. Smith, Thomas Nelson, Jane P. Nelson 1978-4-2 9545 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  RSA0036993  Lomatium macrocarpum Lowell A. Ahart 2013-5-1 18676 Colusa North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD163208  Lomatium macrocarpum Craig D. Thomsen 2000-4-28 2206 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
  SEINET199389  Lomatium marginatum Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3172 Colusa 'Grapevine Grade' to Lodoga 7.7 miles west of Sites Comment
  JEPS17551  Lomatium utriculatum W. L. Jepson 1920-5-23 8968 Colusa near Leesville (Bear Valley, w. Colusa Co.); w. Colusa Co., Bear Valley Comment
  SEINET13944679 Image available Lomatium utriculatum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  SEINET215143  Lomatium utriculatum Linda Lea Ferwerda 1968-5-4 Colusa Wilbur springs road 8 miles northwest from its junction with State highway 20 408 Comment
  SEINET11262797  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites Logoda Road ca. 5.2 miles NW of Sites.; 0 175 Comment
  SEINET9672754  Lomatium vaginatum R. R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road, ca. 5.2 mi NW of Sites. 175 Comment
  UCD70235  Lonicera interrupta D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  JEPS80249  Lonicera involucrata var. ledebourii L. R. Heckard, and J. Hickman 1980-9-15 5428 Colusa slopes below Summit Springs (Lake-Colusa County boundary); Snow Mt. 1524 Comment
  CAS-BOT-BC198625  Lotus Roxana S. Ferris 1917-4-14 577 Colusa Foothills 7 miles west of Arbuckle, Arbuckle-Rumsey Road. Comment
  RSA725013  Lotus corniculatus L. Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
Read comments
Aug 9 2017
  UC1299188  Lotus crassifolius var. crassifolius Freed W. Hoffman 1948-6-27 2515 Colusa 8.6 mi s Fouts Springs (w Colusa Co.); Upper Letts Valley Comment
  JEPS80208  Lotus denticulatus L. R. Heckard and J. Hickman 1980-7-3 5362 Colusa n of (across road) Summit Springs (sw slope of Snow Mt., Lake-Colusa County boundary); Snow Mt. 1548 Comment
  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
  UCR257975  Lotus grandiflorus Ellen Dean, Craig D. Thomsen, Gordon Harrington, R. Wilmarth, R. Wenk 2010-6-2 6045 Colusa Walker Ridge, along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 770 Comment
  JEPS60197  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2231 Colusa 1.5 mi ne Fouts Springs (near junction of Stonyford-Fout Springs road and Trough Spring Ridge road) 670 Comment
  UCR71533  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2263 Colusa Along Trough Spring Ridge road 1/2 mi. SW of junction with theStonyford-Fouts Spring road (c. 5 mi. west of Stonyford). 732 Comment
  HSC45721  Lotus humistratus M. Alcasas 1978-4-22 45 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA424761  Lotus humistratus Aaron Liston, M. Blumler 1987-4-26 668 -6 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UC726262  Lotus humistratus A. A. Heller 1940-6-7 15714 Colusa e of Lodogo (on the Lodogo-Sites road, near the foot of the grade) Comment
  RSA138209  Lotus micranthus Volney Rattan 1884 Colusa Fonts Spring Comment
  JEPS75753  Lotus purshianus var. purshianus L. R. Heckard, and R. Bacigalupi 1976-9-6 4434 Colusa just e Fout's Camp; Snow Mt. 1859 Comment
  UCD65956  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 68 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. 12 Comment
  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
  UCD163846  Lupinus albifrons Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CAS-BOT-BC198401  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams 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
  UCR212293  Lupinus albifrons var. collinus Ellen Dean, Davis Botanical Society 2008-5-31 5010 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, between Cedar Grove Campground and the summit, near crossing of tributary of Little Stoney Creek 1309 Comment
  UCR233447  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17121 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 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
  CHSC86866  Lupinus bicolor B. Castro 2003-3-25 1403 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On ridgetop. 167 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
  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
  HSC89739  Lupinus bicolor A. Eller, A. Smith, B. Hoffman 1989-4-15 20 Colusa Brim Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  NY15886  Lupinus formosus var. robustus A. A. Heller 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
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  RSA716572  Lupinus microcarpus D. Isle 1995-4-27 403 Colusa East Park Reservoir Rd. at N edge just at rt. angle turn, w. of cattle guard 1/4 mi. 348 Comment
  CHSC71113  Lupinus microcarpus var. densiflorus Jan Monelo 1989-4-1 7 Colusa In hillside spanning Hwy 20. Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC90508  Lupinus microcarpus var. densiflorus Martin Polsan 1988-4-9 14 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  UC1543161  Lupinus microcarpus var. densiflorus Charlotte G. Nast 1936-4-17 137 Colusa Williams to Lake Co. Road Comment
  SD52958  Lupinus microcarpus var. densiflorus Peter H. Raven 1962-5-31 17910 Colusa Stae Hwy 20, 2.5 miles east of Lake County line Comment
  SEINET239852  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1 /20 Colusa Roadside Ladoga-Leesville Road. 4.4 miles north of Leesville. 457 Comment
  UC614851  Lupinus microcarpus var. densiflorus Beryl O. Schreiber 1932-4-3 223 Colusa road to Williams; road to Williams Comment
  CHSC107948  Lupinus microcarpus var. microcarpus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1849 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 170 ft northeast of Tehama-Colusa Canal. Ca 0.15 mi S of large +- saline/alkaline wetland/ marsh, on dry grassy hillside just downslope from canal. 59 Comment
  CHSC91822  Lupinus microcarpus var. microcarpus D. Isle 1995-4-27 403 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. East Park Reservoir Rd. at N edge just at rt. angle turn, w. of cattle guard 1/4 mi. 347 Comment
  UC73206  Lupinus nanus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley, near College City Comment
  HSC14931  Lupinus pachylobus D. R. Junell 1965-4-18 30 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  POM163514  Lupinus polycarpus Roxana S. Ferris 1926-4-22 6297 Colusa 2 miles west of Colusa Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  SEINET9325857  Lupinus succulentus Unknown 2009-5-20 14735 Colusa Glasscock Mountain Comment
  UCR206293  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14735 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCR233449  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  HSC48193  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3963 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  SEINET10490294  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 Nelson 3963 Colusa Along bear valley rd. 2.5 Mi from jct with state route 20. Oak woodland. 366 Comment
  UCD163325  Lycium barbarum Craig D. Thomsen 1997-4-19 1908 Colusa Wilbur Springs. About 4 miles north of Hwy 20. Vicinity of Blank Spring, about 0.75 miles west of Wilbur Hot Springs hotel, adjacent to Sulphur Creek. Comment
  SBBG119884  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  CDA37495  Lythrum californicum D. Brown 1977-5-31 s.n. Colusa Near Williams. 0 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
  UCR225655  Lythrum hyssopifolia Craig D. Thomsen, Gordon Harrington 2008-7-6 2773 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  RSA0015853  Lythrum hyssopifolia Roxana Stinchfield 1916-6-17 286 Colusa At Tule levee, College City. Comment
  JEPS104406  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  SD211626  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, et al 1989-10-21 8870 Colusa Southeast end of East Park Reservoir North of Lodoga, narrow strand on shady substrate 366 Comment
  UCD102948  Lythrum tribracteatum H. L. Mason 1945-7-11 12645 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. Comment
  UCD67079  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5103 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
  UCD58118  Madia Ellen Dean; PLB 102 Class 2007-4-29 3713 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Craig Canyon. Along unimproved road. 328 Comment
  JEPS4791  Madia elegans Rimo Bacigalupi with L. R. Heckard 1951-8-6 3472 Colusa 1 mi se Sites (in canyon near stone quarry) Comment
  CAS-BOT-BC342679  Madia elegans Walter Knight; Irja Knight 1963-9-23 103 Colusa Near Stony Ford Comment
  CHSC94320  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  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
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  CHSC27631  Madia exigua Timothy Spira; Robert Schlising 1978-5-13 3239 Colusa Just E of Lake County line, along Hwy 20. Comment
  JEPS119422  Madia exigua G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 Comment
  UC638697  Madia exigua Ethel Crum 1938-5-7 2008 Colusa 4.2 mi n Rumsey (Comanche Hills, summit of ridge); Inner North Coast Range 254 Comment
  UCD57855  Madia exigua Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 43 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  UCR206319  Madia exigua George K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 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
  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
  UCD163226  Madia sativa Craig D. Thomsen 2000-5-30 2260 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66442  Madia sativa Craig D. Thomsen 2000-4-28 2191 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS127598  Malacothamnus fremontii David Isle with Frank Elliott 2014-6-11 2134 Colusa Frank and Judy Elliott Ranch, ca 1 mile S of Rail Canyon Road junction with Sites-Lodoga Road and ca 1/2 mile S of Sites-Lodoga Road. Comment
  UCD83450  Malacothrix clevelandii Craig Thomsen; G. Harrington 2009-5-12 2826 Colusa Colusa County on Walker Ridge: About 200 yards south of spur road enroute to Eaton Springs from Walker Ridge Rd. ( About 1/2 mile east of Walker Ridge Road) 822 Comment
  CAS-BOT-BC347385  Malacothrix floccifera Alice Eastwood; John Thomas Howell 1938-5-16 5635 Colusa Lake-Colusa Co. line on road to Williams 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
  CHSC112252  Malacothrix floccifera Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18627 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UC1053472  Malacothrix floccifera Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3185 Colusa just w Bear Valley (just w of base of the grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  UC1212583  Malacothrix floccifera Francia Chisaki and Helen Sharsmith 1959-5-27 1336 Colusa 1.6 mi e Cooks Spring (on road to Cooks Spring); Inner North Coast Ranges Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  UCD163336  Malacothrix floccifera Craig D. Thomsen 2009-5-3 2807 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCD82542  Malacothrix floccifera Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5698 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UC18727  Malva nicaeensis J. Burtt Davy May, 1898 4276 Colusa near Willows Comment
  CHSC107935  Malvella leprosa B. Castro; Amy Lyons 2011-8-3 1902 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 0.7 mi southeast of Funks Reservoir and 350 ft northeast of Tehama-Colusa Canal. In grassland in patch under transmission lines ca 0.3 mi northwest of large +- alkaline marsh. 52 Comment
  CHSC117119  Malvella leprosa B. Castro; Tom Boullion 2009-8-19 1800 F Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, near Moon Bend on W bank of the Sacramento River at RM 141.4, just off Moon Bend Rd. Near main levee road. 18 Comment
  UC18825  Malvella leprosa J. Burtt Davy May, 1898 4303 Colusa Princeton Comment
  UC573258  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 mi. s. Colusa; Colusa Quad. 15 Comment
  CDA32964  Malvella leprosa Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  RSA121079  Malvella leprosa H. S. Yates 1936-8-14 6130 Colusa 3 miles S. of Colusa 15 Comment
  SEINET6669708  Marah fabacea R. R. Halse 2014-3-25 9029 Colusa Along the Sites-Logoda Road about 4.7 miles northeast of Logoda; on the west end of Grapevine Pass 527 Comment
  UCD80838  Marah fabacea Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5295 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Ridge between Brophy Canyon and the canyon to its north. Highest point just above northern canyon at its terminus in a stock pond. 512 Comment
  CAS-BOT-BC361307  Marah watsonii Richard R. Halse 2013-3-26 8744 Colusa Along the Leesville-Logoda Road ca 5.5 miles S of Logoda, or 3.2 miles N of the junction of the Leesville and Bear Valley Roads; Indian Valley 426 Comment
  JEPS95245  Marah watsonii Steve Edwards 1996-4-26 Colusa Walker Ridge NE of Barrel Springs, on serpentinite scree visible immediately S of Brim Grade, E of Walker Ridge Road and not far below the latter in elevation Comment
  UCD56943  Marah watsonii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3545 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 342 Comment
  UCD66594  Marah watsonii Craig D. Thomsen 2000-4-28 2241 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCD67083  Marsilea vestita subsp. vestita Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5105 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
  UCD107748  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Slopes of Little Stoney Creek, Mendocino National Forest. Inner north coast ranges. 762 Comment
  UCD63031  Medicago minima Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  UCR212379  Medicago minima Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  UCR233452  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-4-1 17118 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  SEINET3260185 Image available 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
  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
  UCD107925  Medicago sativa Beecher Crampton 1963-8-5 6873 Colusa 3.5 miles south of Grimes. Comment
  UCD107927  Medicago sativa Beecher Crampton 1963-8-5 6874 Colusa 3.5 miles south of Grimes. Comment
  CDA14215  Melica californica G. F. Hrusa 1993-5-2 10859 Colusa Frenzel Creek Research Natural Area; Mendocino National Forest. Small colony of several clumps on lower NW facing slopes in mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Scattered among openings in sparse Quercus durata chaparral. Perennial. Comment
  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
  UCD37178  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  UCD86457  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  UCD87699  Melica californica Beecher Crampton 1958-5-19 4817 Colusa West of Lodoga. Comment
  SEINET11684249  Melica californica Unknown 1971-1 908 Colusa 3.3 mi N of Stony Ford on Elk Creek Road Comment
  JEPS80810  Melica harfordii L. R. Heckard and J. C. Hickman 1981-7-31 5783 Colusa Fouts Springs Overlook Snow Mt. (e side of Snow Mt.) 1813 Comment
  UCD57334  Melica torreyana Diane Hickson 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
  UCR212338  Melica torreyana Craig D. Thomsen 2001-5-24 2510 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.25). 342 Comment
  UCR206740  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2009-1-31 14320 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
  UCD107985  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa Little Stony Creek. 457 Comment
  RSA718054  Mentha arvensis L. Ahart 2006-8-9 13090 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  POM62477  Mentha canadensis Roxana Stinchfield 1918-7-8 382 Colusa Sycamore Slough; Stinchfield Ranch Comment
  CHSC94511  Mentha rotundifolia Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC75615  Mentzelia dispersa Vernon H. Oswald; Lowell Ahart 1999-6-22 9778 Colusa Lily Pond near upper Letts Lake west of Stonyford. 1243 Comment
  UC725296  Mentzelia dispersa A. A. Heller 1940-6-7 15718 Colusa 1 m or more e Lodogo (below the road near the foot of the grade) Comment
  UCD163656  Mentzelia laevicaulis Craig Thomsen 1998-6-10 1954 Colusa Bear Valley. About 7 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
  UCD56904  Micropus californicus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3507 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
  CAS-BOT-BC348362  Micropus californicus var. californicus Roxana S. Ferris 1917-4-14 573 Colusa Foothills 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC62919  Micropus californicus var. californicus Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 B Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  HSC40247  Micropus californicus var. californicus J. P. Smith, Thomas W. Nelson 1976-4-14 8584 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  JEPS40618  Micropus californicus var. californicus W. L. Jepson 1932-5-8 16279 Colusa Lodoga Comment
  JEPS86623  Microseris L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6703 Colusa sw flank of mountain 0.5 km w Summit Springs (Colusa-Lake County line); Snow Mountain 1500 Comment
  HSC44282  Microseris douglasii Barbara Kelly 1977-4-24 353 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  JEPS120972  Microseris douglasii Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18628 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC112209  Microseris douglasii subsp. douglasii Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC115388  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  JEPS124223  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  JEPS124230  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  JEPS36201  Microseris douglasii subsp. douglasii W. L. Jepson 1920-5-23 8970 Colusa Bear Valley 426 Comment
  JEPS94219  Microseris douglasii subsp. douglasii Vernon Oswald and Lowell Ahart 1998-5-7 8999 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
  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
  UCD64514  Microseris douglasii subsp. douglasii Craig D. Thomsen 2000-4-12 2101 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UC92169  Microseris douglasii subsp. douglasii K. Brandegee 1889-1 Colusa Comment
  CHSC86599  Microseris elegans Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  JEPS94209  Microseris sylvatica Vernon Oswald and Lowell Ahart 1998-5-7 8991 Colusa Lodoga-Leesville Road 4.3 mi s of Cooks Springs Road; Lodoga-Leesville Road 469 Comment
  CHSC86524  Microsteris gracilis B. Castro; Beth Hendrickson 2003-3-19 1391 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  UCD163671  Microsteris gracilis Craig Thomsen 1999-4-15 1971 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD56675  Microsteris gracilis Jack Alderson 2007-3-25 11 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 571 Comment
  CHSC112646  Mimetanthe pilosa Lowell Ahart 2013-10-1 19072 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
  JEPS110061  Mimulus guttatus Lowell Ahart 2006-8-22 13224 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  RSA0118612  Mimulus guttatus Lowell Ahart 2013-5-1 18688 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD64424  Mimulus guttatus Craig D. Thomsen 2000-4-28 2187 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212343  Mimulus guttatus Craig D. Thomsen 2000-4-28 2187 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  JEPS104385  Mimulus microphyllus Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  JEPS3633  Mimulus microphyllus H. L. Mason 1953-5-5 14518 Colusa 1/4 mi above confluence of Little Stony Creek and Trout Creek; Little Stony Creek drainage 670 Comment
  UC725827  Mimulus microphyllus A. A. Heller 1942-5-29 16482 Colusa 1/2 mi w Highway #16 (along State Highway #20) Comment
  UCD40884  Mimulus nasutus Richard Schulhof 1984-4-21 8 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 Comment
  UC1334723  Mimulus nudatus Eugene Memmler 1969-5-8 101 Colusa ca. 1 mi e Lake County line (along State Hwy 20 from Williams); Bear Creek 457 Comment
  UCR261755  Mimulus pilosus Ann Howald 2003-5-30 2358 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  HSC31564  Minuartia douglasii Teresa Prendusi 1974-5-4 49 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  RSA423545B  Minuartia douglasii J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9535 Colusa Bear Valley Road, 1.3 miles from its junction with State Route 20. 366 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
  JEPS73512  Minuartia nuttallii subsp. gregaria L. R. Heckard 1972-7-10 3130 Colusa overlooking and 3 mi nw Fouts Springs (promontory on se corner); Snow Mt. 1828 Comment
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  JEPS81404  Monardella odoratissima subsp. glauca L. R. Heckard and J. C. Hickman 1982-7-9 6017 Colusa near junction Horse Glade (along road to Lookout, Colusa-Lake County boundary); Goat Mt. 1737 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
  CAS-BOT-BC220675  Monardella villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  UCR44933  Monardella villosa L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Rd, 2.2 mi. west of Mendocino National Forest boundary, NE of Clear Lake 678 Comment
  UCD22648  Monardella villosa subsp. sheltonii Laura F. Galloway 1988-5-1 6 Colusa Leesville Road, 11.9 miles north of SR20. 487 Comment
  IRVC29847  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4991 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  CDA20256  Monardella villosa subsp. villosa G. D. Barbe, Nola Parmer 1982-6-4 3637 Colusa North Coast Ranges; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  CAS-BOT-BC83272  Myosurus minimus Roxana S. Ferris 1918-4-10 1442 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83274  Myosurus minimus Herbert L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83276  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83282  Myosurus minimus James Jokerst 1986-5-6 2299 Colusa Near Lurline Creek. 41 Comment
  SD225889  Myosurus minimus Carol Witham, Jennifer Buck and Vernal Pool Team 2001 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 Comment
  UC1101348  Myosurus sessilis Herbert L. Mason 1953-4-5 14510 b Colusa 3 mi e of Maxwell Comment
  UC1114813  Myosurus sessilis Donald E. Stone 1956-6 1- 8 -1 Colusa 3 mi e of the city of Maxwell (on the Maxwell Road); Maxwell Road Comment
  UCD67084  Najas gracillima Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5106 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-BC259753  Nassella cernua Roxana S. Ferris 1926-4-23 6399 Colusa Near Mountain House on Williams - Stonyford Road Comment
  POM163454  Nassella cernua Roxana S. Ferris 1926-4-23 6399 Colusa On rocky outcrop near Mountain House on Williams-Stonyford Road Comment
  CHSC100258  Nassella pulchra D. Isle 1988-4-13 1506 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 Comment
  UCD57863  Nassella pulchra Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 48 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  UCD66983  Navarretia atractyloides Ellen Dean; Davis Botanical Society 2008-5-31 5057 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  CHSC72457  Navarretia divaricata subsp. vividior L. P. Janeway; David Isle 1998-7-3 5711 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  CHSC76766  Navarretia heterandra J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 114 Comment
  UC908879  Navarretia heterandra Herbert L. Mason 1946-5-30 12816 Colusa near Eppersons; Bear Valley 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
  JEPS108184  Navarretia jepsonii David Gowen 2005-6-22 446 Colusa Goat Mtn. Rd. (dirt road), ca. 1 mile E. of Ladoga Stonyford Rd., just inside the Mendocino Nat'l Forest boundary. 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
  UCD61473  Navarretia jepsonii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3919 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCR261670  Navarretia jepsonii Ann Howald 2003-5-29 2346 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  UCR261754  Navarretia jepsonii Ann Howald 2003-5-31 2360 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  CHSC107978  Navarretia leucocephala subsp. leucocephala B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1854 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
  CDA40123  Navarretia nigelliformis D. Brown 1986-6-3 s.n. Colusa County road southwest of Williams. 0 Comment
  UCD57871  Navarretia nigelliformis subsp. nigelliformis Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 51 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  CAS-BOT-BC230054  Navarretia pubescens Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5646 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 839 Comment
  SJSU6292  Navarretia pubescens E. O. Hass 1956-5-12 Colusa 10 mi SW of Arbuckle Comment
  UCD72461  Navarretia pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3795 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  UCD82118  Navarretia pubescens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5646 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CHSC89877  Navarretia tagetina B. Castro; L. Janeway, S. Innecken 2001-5-9 1246 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Along dirt road paralleling N-S-trending perennial creek. 365 Comment
  JEPS22942  Nemacladus capillaris Volney Rattan 1884-1 Colusa above Stony Creek Comment
  UCR78370  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa road to Goat Mtn Lookout, 2.2 mi. south of Route M-10 (Bear Creek - Fouts Spring Road) at head of S Fork of Stony Creek, c. 12 air mi. WSW of Stonyford 1500 Comment
  JEPS80750  Nemacladus capillaris L. R. Heckard and J. C. Hickman 1981-7-29 5713 Colusa n of Summit Springs (n of road, s side of Snow Mt, Colusa-Lake county boundary); Snow Mt. 1539 Comment
  RSA537450  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  SBBG126069  Nemophila heterophylla G. K. Helmkamp with E. A. Helmkamp 2009-3-11 14372 Colusa St Hwy 20, 14.3 mi SW of Williams 375 Comment
  UCD169730  Nemophila heterophylla Richard R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  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
  UCD120236  Nemophila menziesii Gene R. Williams 1961-3-29 32 Colusa South of Bear Valley; 3 miles north of junction of State Highways 16 and 20. Comment
  CHSC62938  Nemophila pedunculata Vernon H. Oswald; Lowell Ahart 1994-4-6 6076 Colusa Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford. 548 Comment
  JEPS80381  Nemophila pedunculata L. R. Heckard and J. Hickman 1981-6-22 5614 Colusa along Dark Hollow Creek (Big Meadow, Snow Mt.); Snow Mt., , Big Meadow 1889 Comment
  UCD63012  Nemophila pedunculata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4665 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  JEPS120705  Nicotiana acuminata var. multiflora Lowell Ahart 2013-10-1 19084 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
  CAS-BOT-BC400054  Nuphar polysepala F. P. Cronemiller 1924-6-26 892 Colusa Upper Letts Swamp 1371 Comment
  CHSC101616  Nuttallanthus canadensis David W. Isle; Teal Richards 2002-4-18 1652 Colusa Mendocino National Forest. N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mountain). SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg. Study Plot. MDB and M. 524 Comment
  CAS-BOT-BC227679  Oemleria cerasiformis Craig Thomsen 2008-6-12 2762 Colusa Walker Ridge, vicinity of Elgin Mine. Lucientes Property 655 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
  UCD84573  Orobanche fasciculata Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6098 Colusa Walker Ridge on border of Lake and Colusa counties. Just E of Barrel springs area along Walker Ridge Road. 721 Comment
  UC71779  Orobanche vallicola H. P. Chandler 1905-10-1 Colusa Princeton Comment
  CAS-BOT-BC238372  Orthocarpus Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley 304 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
  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
  UCD40886  Orthocarpus purpurascens G. Robinson 1984-4-21 3 Colusa About 50 yards west of Wilbur Springs Road on Bear Valley Road. 3.2 miles north of Hwy 20. 390 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
  CHSC88577  Packera clevelandii L. P. Janeway 2001-6-6 7112 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  JEPS95998  Packera clevelandii Vernon H. Oswald and L. Ahart 1999-6-22 9783 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  UCD110512  Packera clevelandii Daniel Slakey; CNPS volunteers 2011-6-12 6 Colusa Walker Ridge. Wet meadow area on E side of Walker Ridge Rd. About 18 km N of Hwy.20 by road. 876 Comment
  UCD133496  Packera clevelandii D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  UCD64040  Packera clevelandii Craig D. Thomsen 2000-6-23 2425 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCD163327  Packera eurycephala Craig D. Thomsen 2009-5-3 2792 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS74815  Packera eurycephala var. eurycephala L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4024 Colusa sw of Leesville (just sw of site of old Kowalski ranch( below upper dam road)); Upper Indian Valley 396 Comment
  UC1299386  Paeonia brownii Freed W. Hoffman 1948-6-27 2493 Colusa 8.6 mi sw Fouts Springs (w Colusa Co.); upper Letts Valley 1310 Comment
  CAS-BOT-BC253663  Panicum capillare Roxana Stinchfield 1916-7-10 479 Colusa Davis Tule near Sycamore Slough Comment
  CHSC94428  Panicum capillare Lowell Ahart 2006-8-22 13222 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  POM313202  Panicum dichotomiflorum H. L. Mason 1945-9-19 12720 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UC1101582  Panicum dichotomiflorum subsp. dichotomiflorum Herbert L. Mason 1945-9-19 12720 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River Comment
  CAS-BOT-BC253938  Parapholis incurva James Jokerst 1986-5-6 2302 Colusa Near Lurline Creek 41 Comment
  UCD88625  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCR119180  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa Sacramento Valley, 2 miles east of Maxwell 91 Comment
  CAS-BOT-BC413468  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Sycamore Slough. Stinchfield ranch Comment
  POM166124  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Stinchfield Ranch, along Sycamore Slough Comment
  UC1037264  Paspalum boscianum E. Wilson 1934-8-9 54 Colusa Biggs Comment
  POM198505  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Williams Road-the 'Trough' Comment
  UCR225658A  Paspalum distichum Craig D. Thomsen, Gordon Harrington 2008-7-6 2780 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  JEPS87668  Pectocarya pusilla Vernon H. Oswald and Lowell Ahart 1994-4-6 6071 Colusa s. Stonyford (Goat Mtn. Road 0.8 mi s. of Sullivan Creek Bridge, sw of Digger Pine Flat) 487 Comment
  UCD57114  Pectocarya pusilla Gordon Harrington; Diana Hickson 2007-4-7 0018 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  CHSC62850  Pedicularis densiflora Vernon H. Oswald 1994-3-23 6012 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  SEINET13753666  Pedicularis densiflora R. R. Halse 2014-3-25 9035 Colusa Along the Bear Valley Road ca. 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  RSA589938  Pedicularis densiflora Michael A. Vincent, Robert M. Rhode 1996-3-30 7304 Colusa Along Brim Road, 2.9 mi W jct Bear Valley Rd. Comment
  JEPS80796  Pedicularis semibarbata L. R. Heckard and J. C. Hickman 1981-7-30 5766 Colusa along Trout Creek (se side of Mount Snow); Snow Mountain 1554 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
  SEINET3873302  Pellaea mucronata subsp. mucronata Stephen Plant 1978-4-22 212 Colusa Wilber Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  CHSC86960  Pellaea mucronata var. mucronata B. Castro 2003-4-10 1423 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In E-trending small side canyon tributary. 146 Comment
  UCD83617  Pellaea mucronata var. mucronata Craig Thomsen; G. Harrington 2009-5-12 2833 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  HSC97535  Penstemon heterophyllus subsp. heterophyllus J. Carey, A. Hong, J. Leffingwell 1995-5-7 89 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  UCR206380  Penstemon heterophyllus subsp. purdyi George K. Helmkamp, E. A. Helmkamp 2009-5-20 14756 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CHSC86122  Penstemon heterophyllus var. heterophyllus Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 213 Comment
  NY601740  Penstemon heterophyllus var. purdyi C. C. Freeman 1983-5-22 1891 Colusa CA 20, 2.2 miles north-northeast of the junction of CA 20 & 16 in the foothills of the Sierra Cascades. Comment
  UC76098  Penstemon heterophyllus var. purdyi Miss M. Alice King 1905-1 Colusa near College City (hills beyond Arbuckle); Sacramento Valley, near College City, Arbuckle Comment
  UC125238  Penstemon purpusii Katharine Brandegee 1892-8-24 Colusa Snow Mountain near Monument; Snow Mountain near the Monument Comment
  CHSC70866  Pentachaeta exilis subsp. exilis Vernon Oswald; Lowell Ahart 1998-4-21 8947 Colusa Goat Mtn. Rd. 0.2 mi southwest of Stonyford-Lodoga Rd. Roadside. 390 Comment
  UCD63109  Perideridia kelloggii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4940 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 351 Comment
  UCD63128  Perideridia kelloggii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4958 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  CHSC116397  Perideridia kelloggii David Isle; Frank Pendell 2014-6-16 2135 Colusa North Coast Range. About 2 miles west of Stonyford on the Pendell Ranch. Southeast of the home of Frank and Sheri Pendell about 1/4 mile and northwest of the Stonyford Cemetery about 200 yards (GPS is Pendell home S of Fouts Springs Rd. ~50 yds. 10S -0536687E, 4357699N. 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
  UCD99462  Persicaria lapathifolia C. F. Dunshee 1922-1 s.n. Colusa Rice fields. Comment
  CHSC61435  Persicaria punctata Vernon H. Oswald 1993-8-16 5807 Colusa Sacramento National Wildlife Refuge located ca. 7 mi S of Willows, W1/4 of Tract 44, near the S boundary of the refuge. Growing in shallow water on the N edge of Hunters Creek. 24 Comment
  CHSC94459  Persicaria punctata Lowell Ahart 2006-8-9 13133 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1047027  Phacelia L. R. Heckard and C. R. Bell 1951-6-14 180 Colusa s-facing slope near Stonyford Comment
  UC1228357  Phacelia corymbosa L. R. Heckard and G. T. Robbins 1956-7-24 816 Colusa about 1/2 mi s summit; Snow Mountain 2042 Comment
  CHSC62845  Phacelia distans Vernon H. Oswald; Lowell Ahart 1994-3-23 6021 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Locally common in gravelly serpentine soil on the bank between the road and Little Stony Creek. 505 Comment
  CHSC91556  Phacelia distans D. Isle 1995-4-30 392 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt. Rd., 5.1 mi. out from jct. with Stonyford-Lodoga Rd. and just W of Sullivan Creek Bridge. 475 Comment
  CAS-BOT-BC278171  Phacelia distans Mona Bourell 1997-3-29 5807 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  CHSC12767  Phacelia divaricata L. V. Ritter 1969-4-30 235 Colusa Ca. 100 yds. w of the junction of Highway 20 and 16, ca 50 yds. n of Highway 20. Comment
  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
  UCR212377  Phacelia divaricata Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek 358 Comment
  POM287455  Phacelia divaricata Lyman Benson 1933-4-16 4326 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  SD58509  Phacelia egena L. R. Heckard, C. R. Bell 1951-6-14 176 Colusa West facing serpentine slope near Stonyford. Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SEINET7096745  Phacelia heterophylla subsp. virgata A. G. Vestal 1955-4-5 s.n. 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
  HSC47567  Phacelia imbricata Sheila Logan 1978-4-22 67 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD57821  Phacelia imbricata Gordon Harrington 2007-4-17 32 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 552 Comment
  UCR233444  Phacelia imbricata subsp. imbricata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17132 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  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
  POM163459  Phacelia tanacetifolia Roxana S. Ferris 1926-4-23 6407 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCR233441  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17129 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  POM198501  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 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
  CHSC85974  Phalaris paradoxa Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 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
  SEINET7096814  Phlox gracilis A. G. Vestal 1985-4-5 s.n. Colusa Along Route 16 about .2 mile south of Route 20 and near Bear Creek. NAD27, 39? deg. 00'36ao , -122?_ 21'22ao (converted to WGS84 decimal degrees). Comment
  UC1051738  Phlox gracilis Helen K. Sharsmith 1953-6-20 4293 Colusa Goat Mountain summit, Lake-Colusa boundary Inner North Coast Ranges, Mendocino National Forest 1864 Comment
  UC83659  Phlox gracilis Katharine Brandegee Apr 1889 Colusa Leesville 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
  JEPS21852  Phoradendron densum John R. Swanson 1958-4-26 323 Colusa 2.8 mi. w. Bear Valley rd. (near Colusa-Lake Co. boundary, on rd. to Bartlett Springs) 670 Comment
  UCR257578  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley, along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian 20 Comment
  UCD80895  Phragmites australis Jack Alderson; C. Thomsen 2009-3-18 24 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Headwaters of Craig Canyon. 527 Comment
  CHSC85956  Phyla nodiflora var. nodiflora Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  CHSC60924  Phyla nodiflora var. rosea Vernon H. Oswald 1993-6-23 5571 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, near the S side of Cell 2, Pool 10. 21 Comment
  UCD126735  Physalis acutifolia P. B. Kennedy 1922-1 s.n. Colusa Cortena. Comment
  JEPS24655  Physalis lancifolia J. H. Thomas 1960-8-30 8866 Colusa about 5 mi nw 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
  CDA5824  Physalis lancifolia Cowley Jul 1931 Colusa West of Colusa. 0 Comment
  CDA18788  Phytolacca americana J. D. 2000-4-28 PDR 019976 Colusa 2505 Zumwalt Rd., Williams. 30 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
  CHSC105195  Pickeringia montana var. montana B. Castro; L. P. Janeway 1999-7-5 1017 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along N edge of USFS Rd 16N06, near top of Pacific Ridge. 1127 Comment
  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
  UCD165933  Piperia leptopetala Ellen Dean; with Tom Starbuck 2016-4-24 8844 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  CAS-BOT-BC227984  Plagiobothrys Doris K. Kildale 1928-5-8 5016 Colusa 3 miles S of Arbucle [Arbuckle] Comment
  CAS-BOT-BC227985  Plagiobothrys Roxana S. Ferris 1926-4-21 6295 Colusa 3 miles W of Colusa Comment
  SBBG126070  Plagiobothrys canescens G. K. Helmkamp with E. A. Helmkamp 2009-5-20 14750 Colusa St Hwy 16 at "Cowboy Camp" 1.0 mi S of jct with St Hwy 20, adjacent to Bear Crk 332 Comment
  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
  UCD120813  Plagiobothrys canescens Alpaslun Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Comment
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  UCD163690  Plagiobothrys fulvus var. campestris Craig Thomsen 1999-4-15 1992 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CHSC112921  Plagiobothrys humistratus B. Castro; L. Janeway, Robin Carter 2010-3-23 1803 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in distrubed, grazed annual grassland. 121 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
  POM174576  Plagiobothrys infectivus Roxana S. Ferris 1926-4-23 6412 Colusa Near Mountain House on the Williams-Stonyford Road. Comment
  CHSC31261  Plagiobothrys leptocladus R. A. Schlising; K. R. Stern 1980-5-5 3581 Colusa SW of Colusa, at Colusa National Wildlife Refuge; in southwest cornerof refuge, about 0.5 mi north of Ware Road, at immediate roadside in area of dried 'salt flats'. Comment
  SD180603  Plagiobothrys leptocladus Carol Witham, Jennifer Buck 2001-4-30 151 A Colusa 2.0 miles south of the town of Colusa along Highway 20, east of Highway 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001. Comment
  HSC64006  Plagiobothrys nothofulvus J. P. Smith, Thomas W. Nelson 1976-4-14 8585 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD120933  Plagiobothrys nothofulvus E. Witharm 1998-4-17 5 Colusa Bear Vly., Leesville-Lodoga Rd., 2 road miles NE from Bear Vly Rd. -- Leesville-Lodoga Rd. junction. Comment
  POM63665  Plagiobothrys stipitatus Roxana S. Ferris 1917-4-12 533 Colusa 4 miles east of Williams. Comment
  CHSC77923  Plagiobothrys stipitatus var. micranthus Beth Hendrickson; Natalie Wight, Heidi West 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  SD28155  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2124 Colusa 3.0 miles south of Arbuckle 42 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
  CHSC55678  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-3 6623 Colusa North central portion of Delevan National Wildlife Refuge. 45 Comment
  UCD121023  Plagiobothrys stipitatus var. stipitatus G. F. Hrusa; K. Van Katwyk 1995-4-22 12129 Colusa Bear Valley, 15 m. N of Hwy. 20. Inner North Coast Ranges. 400 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
  HSC31843  Plagiobothrys tenellus Maralyn O'Meara, Gary S. Lester 1974-5-4 347 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC47746  Plagiobothrys tenellus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3941 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CAS-BOT-BC60834  Planodes virginica Doris K. Kildale 1928-5-8 5017 Colusa 3 miles south of Arbuckle. Comment
  CHSC107958  Plantago coronopus B. Castro; T. Boullion 2011-4-20 1837 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  JEPS20848  Plantago coronopus B. Crampton 1953-5-7 1219 Colusa 4 mi n Williams Comment
  SD225882  Plantago elongata Carol Witham, Jennifer Buck and Vernal Pool Team 2001 2001-4-30 153 Colusa 2 mi south of the town of Colus along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786;4336302 Comment
  UCD18845  Plantago elongata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 153 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC81283  Plantago erecta J. Trizzino 2001-3-31 18 Colusa Bear Valley Meadow along east side of Bear Balley Road. 396 Comment
  CHSC86120  Plantago erecta Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. Comment
  UCD56669  Plantago erecta Jack Alderson 2007-3-25 5 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. 553 Comment
  UCD56910  Plantago erecta Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3513 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  HSC85854  Plantago erecta Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  UCD14370  Plantago erecta L. Coats 1983-4-24 6 Colusa in the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road. 487 Comment
  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
  SD8259  Platystemon californicus Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC125224  Platystemon californicus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC91598  Platystemon californicus A. A. Heller 1937-4-24 15925 Colusa Meadow on State Highway #20 just west of the junction with Highway #16. Comment
  UCD14364  Platystemon californicus L. Coats 1983-4-24 15 Colusa Colusa Co.; along Bear Valley Road, 4.3 miles south of Bartlett Springs Road; Comment
  UCD96066  Platystemon californicus Linda Osbourne 1980-4-12 12 Colusa 0.3 mile west of junction of Highways 20 and 16, south side of Bear Creek, 16 miles SW of Williams. 321 Comment
  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
  RSA604107  Platystemon californicus var. californicus Steve Daniel 1986-4-13 10 Colusa Bear Valley, 7.6 miles N of junction of Bear Valley Road and Highway 20 396 Comment
  UCD57101  Plectritis ciliosa Gordon Harrington; Diana Hickson 2007-4-7 0017 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  CHSC62948  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald; Lowell Ahart 1994-4-6 6066 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS87663  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  UC999845  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 683 Colusa near Williams Comment
  UC1018913  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 a Colusa Colusa County Comment
  UC999837  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 711 Colusa Colusa County Comment
  JEPS81274  Plectritis congesta L. R. Heckard and J. C. Hickman 1982-7-5 5884 Colusa below (south of) Summit Spring (s side of Snow Mountain); Snow Mountain 1500 Comment
  UC1053421  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  SEINET3411984 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2012-2-9 18535 Colusa Sacramento Valley: River Road, 7.1 miles N of Colusa; east side of Sacramento River 18 Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) Comment
  UCR238903  Poa annua George K. Helmkamp, E. A. Helmkamp 2012-2-9 18535 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  CHSC27859  Poa bulbosa Dieter D. King 1978-1-2 Colusa Salt Canyon n side of Salt Creek, Hwy 20 11 mi wsw of Williams. 128 Comment
  CHSC57562  Poa bulbosa Steven Triano 1987-4-4 16 Colusa Salt Canyon, n side of Salt Creek, ca. 40 ft s of Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD97127  Poa bulbosa Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6911 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  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
  UCD82624  Poa pratensis Craig Thomsen; G. Harrington 2009-5-12 2894 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD84517  Poa pratensis Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6068 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  UCD64291  Poa secunda Craig D. Thomsen 2000-4-12 2130 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  JEPS80447  Poa secunda subsp. secunda L. R. Heckard with J. Hickman 1980-9-15 5438 Colusa n of road at Summit Springs; Snow Mt 1569 Comment
  UCD20204  Poa secunda subsp. secunda J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 16 miles N of junction of Hwys 20 and 16. Comment
  CHSC71641  Pogogyne zizyphoroides Michael A. Wolder 1988-5-12 Colusa Colusa National Wildlife Refuge south west of Colusa. At the edge of a seasonal wetland in Tract 20, Cell 1. 16 Comment
  CHSC115624  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern Sacramento Valley Foothills: North side of Maxwelll Road, about 2 miles W of Sites and 5.8 miles E of summit ofMaxwell Grade. Comment
  JEPS127600  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa N side of Maxwell road, ca 2 miles W of Sites and 5.8 miles E of summit of Maxwell Grade. Comment
  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
  CDA22742  Polygonum amphibium var. emersum P. Steinbaugh, Goodwin 1932-10-1 Colusa Near Grand Island. 0 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
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  CAS-BOT-BC413965  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-6-17 292 Colusa Near College City 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
  JEPS80764  Polygonum parryi L. R. Heckard and J. C. Hickman 1981-7-30 5731 Colusa meadow n Trout Creek (se side of mt.); Snow Mt. 1828 Comment
  CDA2777  Polygonum persicaria L. Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. Comment
  JEPS75839  Polygonum sawatchense subsp. sawatchense L. R. Heckard 1974-9-11 3949 Colusa just nw rocky promontory overlooking Fouts Spring 1798 Comment
  CHSC107982  Polypogon monspeliensis B. Castro; L. Janeway 2011-4-27 1865 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  CHSC94319  Polypogon monspeliensis Lowell Ahart 2006-8-9 13107 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS75436  Polypogon monspeliensis W. L. Jepson 1934-5-3 16602 Colusa n Colusa (Stegeman Sta.) Comment
  SD225721  Polypogon monspeliensis Carol Witham, Jennifer Buck 2001-4-30 149 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  UCD91239  Polypogon monspeliensis A. A. Beetle 1942-5-21 3269 Colusa 12 miles north of Williams. Comment
  SEINET10960577  Polypogon monspeliensis A. Arthur Heller 1902-5-19 Heller 5570 Colusa Near Colusa Comment
  SBBG119883  Polypogon viridis L. Ahart 2006-8-9 13159 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  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
  JEPS127193  Polystichum munitum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20720 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
  JEPS24495  Proboscidea lutea J. H. Thomas 1960-8-29 8847 Colusa along Hwy 20 about 11 mi sw Williams Comment
  JEPS27877  Proboscidea lutea Richard Snow 1958-8-3 671 Colusa on road to Leesville near Highway 20 Comment
  CHSC1582  Prunus emarginata F. Wigmore 1931-5-1 Colusa Stony Creek gorge. Comment
  JEPS75725  Prunus emarginata L. R. Heckard 1974-9-9 3860 Colusa w of Trout Creek crossing on trail from Foutch CAmp (Snow Mountain); Snow Mountain 1828 Comment
  JEPS80050  Prunus emarginata L. R. Heckard with J. Hickman 1979-6-15 5050 Colusa Snow Mountain, East trail from Frog Pond to cirque of east and w peaks Snow Mountain 1981 Comment
  CHSC79456  Pseudognaphalium californicum B. Castro; L. P. Janeway 2000-5-4 1140 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD58168  Pseudognaphalium luteoalbum Gordon Harrington 2007-5-15 58 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  CHSC115395  Psilocarphus oregonus Lowell Ahart 2015-4-10 20008 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC79256  Psilocarphus oregonus B. Castro; L. P. Janeway 2000-4-10 1062 Colusa Vicnitiy of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 91 Comment
  JEPS124212  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  JEPS40463  Psilocarphus tenellus W. L. Jepson 1932-5-7 16267 Colusa Indian Valley Indian Valley (w Colusa County) 518 Comment
  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
  UCR198137  Psilocarphus tenellus Ellen Dean, PLB 102 Class 2007-4-29 3721 Colusa BLM Payne Ranch, west of Hwy 16, c. 2 road mi south of junction of Hwy 20 and Hwy 16 through Craig Canyon, near 'Roadkill Cafe' 415 Comment
  UCD116917  Ptelea crenulata K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, U.S. #20. Comment
  CDA15472  Quercus berberidifolia G. F. Hrusa, T. D. Wilfred 1998-6-19 14609 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  UCD146596  Quercus berberidifolia G. F. Hrusa 1998-6-19 14609 Colusa Inner North Coast Ranges. Above upper Little Stony Creek. Goat Mountain Road. Around 1.5 km west of campground. 485 Comment
  UCD84511  Quercus berberidifolia Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6062 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD83754  Quercus chrysolepis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5951 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  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-BC86602  Quercus douglasii Roxana Stinchfield 1916-6-18 302 Colusa near College City Comment
  UC993117  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993123  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993124  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) 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
  HSC71306  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4620 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD67036  Quercus garryana var. breweri Ellen Dean; Davis Botanical Society 2008-5-31 5017 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  SEINET10881720  Quercus lobata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 908 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
  RSA623529  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  UCD14525  Quercus palmeri Roger Raiche 1990-12-2 B Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD14530  Quercus palmeri John M. Tucker 1991-8-19 4496 -B Colusa California, Colusa Co.; across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs; Comment
  JEPS80372  Quercus vacciniifolia L. R. Heckard and J. Hickman 1981-6-22 5604 Colusa s side East Ridge of East Peak; Snow Mt. 1920 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
  UCD55459  Quercus wislizeni Ellen Dean; Gordon Harrington 2006-10-6 3283 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  CAS-BOT-BC234979  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6064 Colusa On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat 971 Comment
  CHSC45699  Rafinesquia californica Vernon Oswald 1986-5-12 2004 Colusa Sites-Lodoga Rd. 0.2 mi w of Grapevine Pass. Roadside. 487 Comment
  HSC48162  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 Comment
  RSA275336  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  UC768665  Rafinesquia californica R. F. Hoover 1938-4-24 3211 Colusa Upper Sand Creek Comment
  UC1745757  Ranunculus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1390 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  JEPS81342  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  UCD66942  Ranunculus aquatilis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5091 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCD66456  Ranunculus arvensis Craig D. Thomsen 2000-5-12 2324 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  POM163507  Ranunculus californicus var. rugulosus Roxana S. Ferris 1926-4-21 6296 Colusa Colusa County: abandoned rice field, 2 miles W of Colusa Comment
  CHSC77467  Ranunculus canus Vernon H. Oswald 2000-3-29 9904 Colusa Bear Valley Road 4.5 mi south of Brim Road. 405 Comment
  CHSC62943  Ranunculus hebecarpus Vernon H. Oswald; Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 463 Comment
  CHSC79555  Ranunculus hebecarpus B. Castro; L. P. Janeway 2000-5-4 1127 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 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
  UCSB63942  Ranunculus hebecarpus McBride, Marjorie 1986-4-5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15'. E central border of Sect, 32. T15N, R4W. 143 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
  CDA8773  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa By the junction of 5th Street and B Street, Williams. (39.1586 N,122.14724 W) Comment
  RSA730245  Raphanus raphanistrum R. R. Halse 2007-3-22 7104 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCR206871  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2009-1-31 14318 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  HSC97351  Rhamnus ilicifolia J. P. Smith, J. O. Sawyer 2007-9-2 12412 Colusa River Rd. N of Colusa 20 Comment
  UC1051715  Rhamnus purshiana Helen K. Sharsmith 1953-6-19 4265 Colusa near confluence of North and Middle Forks of Stoney Creek (Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest 548 Comment
  CHSC75745  Rhamnus tomentella subsp. crassifolia Vernon H. Oswald; Lowell Ahart 1999-6-22 9785 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. Common shrub on a roadcut and on the rocky bank of Little Stony Creek. 426 Comment
  RSA28824  Rhamnus tomentella subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade 3 miles W of Leesville. Comment
  CDA21477  Rhododendron occidentale G. F. Hrusa 1989-5-7 6047 Colusa North Coast Ranges; Confluence of Little Stony Creek and Frenzel Creek at the Frenzel Ck. Research Natural Area. Mendocino National Forest. 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-BC170522  Rhus aromatica Roxana S. Ferris 1926-4-23 6590 Colusa Near Stonyford. Comment
  UCD15256  Rhus diversiloba R. A. Harris 1974-5-5 051 Colusa Robberts Flat, off of Bartlett Springs road. 487 Comment
  RSA403713  Rhus trilobata var. quinata Michelle Stevens 1979-4-14 30 Colusa Bear Valley Road, 3.9 miles north of State Route 20 412 Comment
  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
  UCD80839  Ribes malvaceum Jack Alderson 2009-2-21 20 Colusa BLM Payne Ranch (Bear Creek Ranch), lands to the SW of intersection of Hwys 16 and 20. Brophy Canyon. 304 Comment
  HSC94175  Ribes malvaceum var. malvaceum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 4 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  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
  RSA0024715  Ribes roezlii J. M. Tucker 1959-5-30 3524 Colusa Ca. 1.25 miles northwest of Goat Mountain Lookout, Goat Mountain. 1768 Comment
  CAS-BOT-BC173956  Ribes viscosissimum Volney Rattan 1884-6-1 s.n. Colusa Black Butte. Coast Mts. North of San Francisco Bay Comment
  CAS-BOT-BC362903  Rigiopappus leptocladus Roxana S. Ferris 1926-4-23 6589 Colusa Near Stonyford Comment
  CHSC86870  Rigiopappus leptocladus B. Castro; Beth Hendrickson 2003-4-7 1418 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. 167 Comment
  HSC48145  Rigiopappus leptocladus Thomas W. Nelson, Jane P. Nelson 1978-4-30 3966 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  UC75806  Rigiopappus leptocladus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD166310  Rigiopappus leptocladus Jack Major 1962-4-28 806 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 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
  UCD82862  Rigiopappus leptocladus Gordon Harrington 2008-4-13 73 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  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
  UCR201553  Rosa californica George K. Helmkamp, E. A. Helmkamp 2008-10-14 14262 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SEINET8723619 Image available Rosa gymnocarpa Helen K. Sharsmith 1953-1 4405 Colusa Near Old Mill Camp, Trough Springs Ridge, Mendocino National Forest. 1036 Comment
  UC1101416  Rotala ramosior Malcolm A. Nobs, S. Galen Smith 1949-7-18 1008 Colusa 2.5 mi w of Williams Comment
  CAS-BOT-BC110478  Rumex Roxana Stinchfield 1916-7-9 418 Colusa Overflow land on Sacramento River - Phillips Ranch. Comment
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  JEPS81280  Rumex crispus L. R. Heckard and J. C. Hickman 1982-7-5 5891 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UCD61482  Rumex crispus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3908 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  CAS-BOT-BC421589  Rumex crispus Roxana S. Ferris 1926-4-22 6284 Colusa 3 miles west of Colusa Comment
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS113057  Saccharum ravennae Gordon Leppig 2001-9-13 1610 Colusa Rt. 16. Mile marker 4.7-4.58. Bear Creek Gravel bar. Comment
  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
  CHSC79011  Sagina apetala J. Marr; C. Warren, H. West, N. Wight 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine Creek. 121 Comment
  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
  UC72585  Sagina apetala Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC77928  Sagina decumbens subsp. occidentalis Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 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
  SBBG115378  Sagittaria latifolia J. McCaskill, Mr. Harvey, L. Davis 1954-8-9 365 Colusa Butte Crk, ca. 4 mi E of Colusa, on E side of Sacramento River Comment
  UC935749  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-7 12981 Colusa Butte Sink; eight mi n of Colusa Comment
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CHSC60893  Salicornia subterminalis Vernon H. Oswald 1993-6-23 5572 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, on the W edge of Cell 2, Pool 11. 22 Comment
  CAS-BOT-BC102858  Salix breweri C. Hart Merriam 1907-7-23 s.n. Colusa Cook Springs Comment
  JEPS95648  Salix breweri Vernon H. Oswald and L. Ahart 1999-6-22 9786 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate. Abundant shrubby willow on the rocky bank of Little Stony Creek. 426 Comment
  UC1356325  Salix breweri Theodore J. Crovello 1965-4-26 686 Colusa along Bartlett Springs Rd. 2.5 mi w junction with Bear Valley Road Comment
  UCR198139  Salix breweri Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-7-7 3678 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
  UCD56932  Salix exigua Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3534 a Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UC1786437  Salix exigua var. hindsiana Edward L. Smith 1965-4-16 659 Colusa One mile east of Colusa. Comment
  CAS-BOT-BC107838  Salix gooddingii Roxana Stinchfield 1916-7-7 397 Colusa Sycamore slough near Sycamore Comment
  HSC71299  Salix gooddingii Thomas W. Nelson, Jane Nelson 1979-4-12 4627 Colusa Along Stony Creek below Digger Pine Campground Comment
  CDA12796  Salix laevigata G. F. Hrusa 1996-2-26 12631 Colusa Inner North Coast Ranges; Small valley approx. 5 m. NW of Hwy. 20 along Leesville Rd. W of Oat Valley at S end of Boxer Valley. Comment
  CHSC77954  Salix laevigata Beth Hendrickson; B. Castro, L. P. Janeway, Mary Ann Griggs 1999-4-12 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 97 Comment
  UCD111126  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa 2.5 miles NW of Sites at base of Little Antelope Grade. 200 Comment
  UCD164153  Salix laevigata Craig Thomsen 1999-4-27 1999 Colusa Bear Creek Canyon. Along Bear Creek, just north of Sulphur Creek confluence, next to Wilbur Bridge. Comment
  UCR198150  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. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  UCR206356  Salix laevigata George K. Helmkamp, E. A. Helmkamp 2009-3-11 14380 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  JEPS81275  Salix lasiandra var. lasiandra L. R. Heckard and J. C. Hickman 1982-7-5 5885 Colusa s side Snow Mt. (Summit Springs, slope below (s of ) area) 1500 Comment
  CDA16094  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges; Goat Mountain on S side. 1722 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
  UCD81257  Salix lasiolepis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5422 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
  CHSC112002  Salix lasiolepis David Isle; David Toren 2003-6-24 2128 Colusa NE border of Veratrum spring and mdw, 1/4 mi E of Goat Mtn Rd 16N03 jct w/Horse Glade rd; (with flowing water). 1670 Comment
  CHSC94432  Salix lasiolepis var. lasiolepis Lowell Ahart 2006-8-9 13147 Colusa Gravel bar, north side and 30 yards west of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110140  Salix lasiolepis var. lasiolepis Lowell Ahart 2006-8-9 13147 Colusa Gravel bar, north side and 30 yards west of the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC19702  Salvia columbariae L. A. Wright Jr. 1971-3-27 7 Colusa Scattered ca. 7 mi w of Williams on Hwy 20. Comment
  HSC87083  Salvia columbariae L. Blackford, S. Branch, D. Malm 1988-4-16 48 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  UC596149  Salvia columbariae R. F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  SEINET12326928  Salvia columbariae E. M. Kelly 1977-1 9 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 10 mi WSW of Williams. Wilbur Springs Quadrangle, 15'.* 143 Comment
  JEPS75867  Sambucus mexicana L. R. Heckard 1974-9-10 3881 Colusa East Circle Trail Snow Mt. (at base of ne-facing rocky cliff along spur running se from west peak) 2011 Comment
  CAS-BOT-BC238630  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield ranch Comment
  SEINET5585731  Sanicula bipinnata Richard R. Halse 2013-1 8741 Colusa Along the Leesville Road ca. 8.3 miles northwest of its junction with State Hwy. 20, west of Williams; or 4.8 miles southeast of the junction with Bear Valley Road. 314 Comment
  CAS-BOT-BC230039  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD56944  Sanicula bipinnatifida Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3546 Colusa BLM Payne Ranch. On west side of Hwy. 16. 2 road miles south of intersection with Hwy. 20. 312 Comment
  CDA38531  Sanicula bipinnatifida T. C. Fuller 1958-4-17 s.n. Colusa 1 mile south of Lodoga. 0 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
  UCD66530  Sanicula crassicaulis Craig D. Thomsen 2000-4-12 2153 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  SEINET13945257 Image available Sanicula tuberosa Bonnie Prange 1974-1 sn Colusa Wilbur Springs Quad. Near Clyde Mine. T14N R6W SEC12, Elev 2800 ft 853 Comment
  UCR206666  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-17 14390 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  CHSC83435  Schoenoplectus americanus Bill Maslach 2001-6-6 13 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; about 50 m downstream of bridge marked '1930.' On creek bank and in creek. 175 Comment
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Jul 20 2006
  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
  SEINET9763234 Image available Schoenoplectus glaucus Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  UCD72473  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3807 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  CAS-BOT-BC111672  Schoenoplectus pungens var. longispicatus A. A. Heller 1916-6-9 s.n. Colusa Coast Range about 8 miles west of Williams in the blue oak belt along a stream. Comment
  CHSC94462  Schoenoplectus tabernaemontani Lowell Ahart 2006-8-22 13214 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UC1055825  Scirpus acutus var. occidentalis Frank W. Gould 1940-5-15 1257 Colusa 2.5 mi n Maxwell (in marshes along roadside); n of Maxwell Comment
  UC1100922  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12975 Colusa pond 2.7 mi n of Colusa between Sacramento River and Butte Creek; Butte Sink, n of Colusa betw Sacramento River and Butte Cree Comment
  POM21047  Scrophularia californica Roxana Stinchfield 1916-6-18 305 Colusa Timber near College City Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS80261  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-15 5441 Colusa n of road at Summit Springs; Snow Mountain, Summit Springs 1524 Comment
  JEPS83803  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
  UCD66954  Scutellaria californica Ellen Dean; Davis Botanical Society 2008-5-31 4998 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD81706  Scutellaria californica Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5714 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCR225654  Scutellaria californica Craig D. Thomsen, Gordon Harrington 2008-7-6 2770 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  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
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  UC71637  Scutellaria tuberosa Miss Alice King 1905-1 Colusa College City Comment
  UCD125753  Scutellaria tuberosa Kim E. Steiner 1978-4-29 195 Colusa on southwest-facing slope, Walker Ridge Rd., 1.5 mi N of State Hwy 20. 777 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
  JEPS73510  Sedum obtusatum subsp. boreale L. R. Heckard 1972-7-10 3128 A Colusa among rocks of promontory on se corner of Snow Mt. overlooking and 3 mi nw Fouts Springs; se corner Snow Mt., nw of Fouts Springs 1828 Comment
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Aug 17 2011
  JEPS81417  Sedum obtusatum subsp. retusum L. R. Heckard and J. C. Hickman 1982-7-9 6025 Colusa just e of Lookout on Goat Mt. 1859 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
  RSA700356  Senecio clevelandii L. P. Janeway, B. Castro 2001-6-3 7103 Colusa At Buck Flat: East side of Walker Ridge at head of Gaither Canyon; about 1.3 km. south-southeast of Baldy Mountain. 872 Comment
  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
  UCD21584  Senecio flaccidus var. douglasii Craig D. Thomsen 2002-11-7 s. n. Colusa N. of Wilbur Hot Springs between Hot Springs gate and hotel. Confluence of Bear and Sulfur Creeks. 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
  JEPS110106  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD64278  Senecio vulgaris Craig D. Thomsen 2000-3-31 2082 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-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  UC727668  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa West Gridley Rd. Butte Sink Comment
  RSA725026  Setaria viridis L. Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UC1733754  Sidalcea diploscypha Kay H. Beach 1940-5-16 657 Colusa Colusa and Lake county line 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
  UCD116642  Sidalcea diploscypha Nancy Vucinich 1978-5-6 20 Colusa 2.5 miles north of the junction of Highway 16 and Highway 20. 365 Comment
  JEPS50051  Sidalcea hartwegii W. L. Jepson 1932-5-8 16278 Colusa Lodoga Lodoga (w Colusa Co.) Comment
  JEPS50060  Sidalcea hartwegii Alice King May 1906 Colusa College City Comment
  UC71634  Sidalcea hartwegii Miss Alice King 1905-1 Colusa College City 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
  RSA756334  Sidalcea keckii David Gowen 2008-5-24 921 Colusa Stoneyford Ladoga Road, about 1.6 miles south of Stoneyford. 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
  JEPS80829  Sidalcea oregana subsp. hydrophila L. R. Heckard and J. C. Hickman 1981-7-31 5800 A Colusa e side Snow Mt. , Dark Hollow Creek (Dark Hollow Creek) 1645 Comment
  JEPS75834  Silene californica L. R. Heckard 1974-9-11 3950 Colusa on Foutch Camp--Box Spring trail just w Trout Creek crossing (Snow Mt.); , w of Trout Creek crossing on Foutch Camp-Box Sprin 1828 Comment
  UC583287  Silene californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi nw Rumsey; nw of Rumsey 304 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
  JEPS86785  Silene campanulata subsp. campanulata Craig D. Thompson 1989-6-3 1564 Colusa ca 1/2 mi e Cook Springs; e of Cook Springs Comment
  HSC48194  Silene gallica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3962 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  SEINET11262894  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  UCD98993  Silene laciniata subsp. californica Cherry Kline 1964-5-2 51 Colusa Bear Creek Canyon, 3 miles north of the Wilbur Springs turnoff on State Highway 20. Comment
  UCD99009  Silene laciniata subsp. californica Kathleen A. Robson 1981-5-25 41 Colusa from Stonyfield, take Fouts Spring Road 8 miles west to Fouts Springs, continue 1 mile West along roadside. 579 Comment
  HSC72140  Sinapis arvensis J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9572 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 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
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  CHSC112272  Sisyrinchium bellum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18644 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD66596  Sisyrinchium bellum Craig D. Thomsen 2000-4-28 2247 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82502  Sisyrinchium bellum Craig Thomsen; G. Harrington 2009-5-12 2861 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCR139084  Sisyrinchium bellum A. Skelly, G. McCabe, B. Bletcher 1996-5-4 37 Colusa 8.4 mi north of Indian Res. Road, on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  CHSC118887  Sisyrinchium bellum David Isle; Frank Pendell 2017-5-17 2173 Colusa Foothils E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  HSC59568  Sisyrinchium bellum Rick Lundquist 1979-4-14 22 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 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
  HSC62930  Solanum parishii Kenneth Clark 1979-4-14 103 Colusa Bear Valley Rd. 3.9 mi. N of State Rte. 20 412 Comment
  HSC72773  Solanum parishii Brian H. McMurtry 1979-3-31 1 Colusa N side Salt Canyon Hwy. 20, 11 mi. WSW of Williams 143 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
  CDA15550  Solidago canadensis subsp. elongata G. F. Hrusa 1998-10-28 14901 Colusa North Coast Ranges; Little Stony Ck. along Cedar Camp Rd. as it enters cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  UC1613356  Soliva sessilis Charles M. Belshaw Apr 1937 2873 Colusa vicinity Cook's Spring; Inner North Coast Range, Devil's Ridge Comment
  UCR238926  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2012-2-9 18531 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CDA32941  Sonchus oleraceus Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  CAS-BOT-BC236519  Sorghum bicolor J. H. Thomas 1960-8-29 8845 Colusa About 5.3 miles east of Lake-Colusa County line along Highway 20 between Clearlake and Williams Comment
  CAS-BOT-BC390103  Spergularia bocconi Roxana S. Ferris 1926-4-24 6576 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  CAS-BOT-BC390299  Spergularia macrotheca var. macrotheca Malcom A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan Comment
  CAS-BOT-BC390300  Spergularia macrotheca var. macrotheca Malcom A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan Comment
  SEINET8883999  Spergularia marina R. R. Halse 2012-3-28 8455 Colusa Williams, along 5th Street between intersections with C and D Streets, near railroad tracks. 24 Comment
  UC625432  Spergularia marina G. B. and R. P. Rossbach 1938-5-31 636 Colusa 2 mi s Maxwell (near irrigation ditch) Comment
  CAS-BOT-BC390768  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 639 Colusa 6 mi. west of Colusa Comment
  JEPS89204  Sphenosciadium capitellatum L. R. Heckard and J. C. Hickman 1981-7-31 5793 Colusa e side Snow Mt. (Dark Hollow Creek); e side of Snow Mt., Dark Hollow Creek 1584 Comment
  CDA41017  Stachys ajugoides var. ajugoides Agr. Comm Staff 1960-5-11 s.n. Colusa [no additional data] 0 Comment
  JEPS73445  Stachys ajugoides var. rigida L. R. Heckard 1972-7-8 3042 Colusa n side of ridge running se West Peak (ca. 10 mi w of Stonyford); Snow Mt. 2011 Comment
  CHSC71433  Stachys albens Vernon H. Oswald; Lowell Ahart 1998-7-15 9268 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS120807  Stachys albens Lowell Ahart 2013-10-1 19079 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  RSA0118630  Stachys albens Lowell A. Ahart 2013-10-1 19079 Colusa Strand of East Park Reservoir, about 2.5 miles (air) southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 365 Comment
  CHSC94315  Stachys pycnantha Lowell Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  RSA0118627  Stachys rigida var. rigida Lowell Ahart 2013-10-1 19080 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCR200673  Stachys stricta Craig D. Thomsen 2006-8-17 2712 Colusa BLM Payne Ranch, c. 30 feet east of Hwy 16, 0.5 mi. south of intersection between Hwy 16 and Hwy 20 300 Comment
  UC72583  Stellaria media Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD84552  Stephanomeria Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6150 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  CHSC94520  Stephanomeria paniculata Lowell Ahart 2006-8-22 13219 Colusa South side of Stony Ceek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD66948  Stephanomeria virgata Ellen Dean; Davis Botanical Society 2008-5-31 4993 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD81218  Stephanomeria virgata Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5555 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  CHSC89451  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2004-10-4 11424 Colusa On the east side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. 369 Comment
  RSA703243  Stephanomeria virgata subsp. pleurocarpa L. Ahart 2004-10-4 11424 Colusa On the east side of Leesville Road, about 4.7 miles by road SE of the intersection of Bear Valley Road, Leesville Ladoga road and Leesville Road, NE of Bear Valley. 370 Comment
  UCD169457  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2004-10-4 11424 Colusa Leesville Ladoga Road and Leesville Road, northeast of Bear Valley, about 4.7 miles by road southeast of the intersection fo Bear Valley Road, on the east side of Leesville Road. 369 Comment
  UCD167943  Streptanthus James Neilson 1982-7-1 4091 a Colusa Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UCD72375  Streptanthus batrachopus A. M. Shapiro 1988-6-6 s.n. Colusa Goat Mountain Road. 762 Comment
  JEPS96909  Streptanthus breweri Dean W. Taylor 1998-6-16 16663 Colusa Bear Valley road 1.5 mi NW junction Highway 120; near mouth Warnick Canyon 350 Comment
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