Search Results — 2000 specimen records retrieved (1621 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
  HSC5009  Abies X shastensis J. O. Sawyer 1968-10-12 755 Colusa Colusa/Lake Co. line, Snow Mtn., boundary N of Clear Lake and W of Stony Ford 2134 Comment
  HSC5007  Abies concolor J. O. Sawyer 1968-10-12 756 Colusa Colusa/Lake Co. line, Snow Mtn., boundary N of Clear Lake and W of Stony Ford 2134 Comment
  CHSC80223  Abutilon theophrasti B. Castro; G. Kuenster 2000-7-19 1200 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal, at edge of a levee road along an un-named drainage through agricultural land. 42 Comment
  CAS-BOT-BC334176  Acer negundo var. californicum Roxana S. Ferris 1926-4-22 6301 Colusa near Sycamore Comment
  CAS-BOT-BC334177  Acer negundo var. californicum Roxana S. Ferris 1917-4-17 618 Colusa Sycamore Slough Comment
  JEPS81339  Achillea millefolium L. R. Heckard and J. C. Hickman 1982-7-6 5952 Colusa West Peak; Snow Mountain 2103 Comment
  UC1071729  Achillea millefolium J. Clausen 1939-6-26 1743 -4 Colusa 17 mi w of, (just before entering Lake County) Williams Comment
  UCD82114  Achillea millefolium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5642 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS75875  Achnatherum lemmonii L. R. Heckard 1974-9-11 3946 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  CHSC105753  Achyrachaena mollis Christine C. Lorain 1989-4-15 1853 Colusa Junction of Hwy 20 with Hwy 16, 41 miles SW of Williams. 152 Comment
  HSC45717  Achyrachaena mollis Sheila Logan 1978-4-22 60 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  POM52917  Achyrachaena mollis Roxana S. Ferris 1917-4-12 s.n. Colusa 4 miles east of Williams. Comment
  UC75911  Achyrachaena mollis Miss M. Alice King 1905-1-1 Colusa near College City; Sacramento Valley Comment
  UC88433  Achyrachaena mollis Brandegee 1900-1 Colusa Colusa Junction Comment
  UCD163687  Achyrachaena mollis Craig Thomsen 1999-4-15 1989 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CAS-BOT-BC29876  Achyrachaena mollis B. G. Baldwin 1986-4-13 598 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  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
  SEINET3245652  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2008-1 14242 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County line (Meridian 7.5') 9 Comment
  UCD66697  Acmispon denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66709  Acmispon denticulatus Craig D. Thomsen 2001-5-24 2509 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
  HSC94147  Acmispon grandiflorus G. Fred Hrusa 1998-6-19 14638 Colusa Below Fouts Springs on Fouts Springs Rd. to Stonyford. 675 Comment
  UCSB61633  Acmispon grandiflorus Heckard, L. 1969-5-28 Colusa Road above and west of Fouts Springs 762 Comment
  SD131845  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 Comment
  SEINET8043935 Image available Acmispon rubriflorus A. Howald 2003-1 2354 Colusa Inner North Coast Ranges: Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road. 397 Comment
  UCR261720  Acmispon rubriflorus Ann Howald 2003-5-30 2354 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road 397 Comment
  UCD66470  Acmispon wrangelianus Craig D. Thomsen 2001-4-12 2461 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCR261721  Acmispon wrangelianus Ann Howald 2003-5-30 2355 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road 397 Comment
  JEPS75833  Aconitum columbianum L. R. Heckard 1974-9-11 3943 Colusa s.e. Foutch Camp (just e. of large rocky outcroppings, Snow Mt.); Snow Mt. 1859 Comment
  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
  UCD13213  Adenostoma fasciculatum Charles Martin 1986-5-17 27 Colusa Along Sites-Lodoga Road, ca. 8.2 miles W of Sites, on roadside. Comment
  JEPS124234  Adiantum jordanii Lowell Ahart 2015-4-1 19989 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
  CHSC80490  Aegilops cylindrica Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD51585  Aegilops triuncialis D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Destanella Flat-Walker Ridge. 450 Comment
  CDA4025  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4028  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  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
  HSC86927  Aesculus californica Anthony J. Desch, Bryon Cariss 1988-4-16 33 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  UCD14547  Aesculus californica Rob Ickel 1989-5-27 12 Colusa California, Colusa Co.; along Highway 16, 1.5 mi south of junction with Highway 20; 316 Comment
  UCD81226  Aesculus californica Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5563 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Canyon to the south of Destanella Flat. 446 Comment
  CHSC32211  Ageratina occidentalis James Jokerst 1980-8-7 1062 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  CHSC56745  Agoseris heterophylla Ginger S. Gough 1989-4-1 7 Colusa Ca. 0.48km W of jct of Hwys 20 and 16, S side of Bear Creek, ca. 29km SW of Williams. 322 Comment
  HSC72163  Agoseris heterophylla J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9538 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 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
  JEPS80432  Agrostis alba L. R. Heckard 1974-9-9 3870 Colusa meadowy area around spring and small stream rocky promontory southeast of Foutch Camp; Snow Mt. 1798 Comment
  JEPS80446  Agrostis alba L. R. Heckard and J. Hickman 1980-9-15 5426 Colusa w Summit Springs (upper margin of moist seep on slope); Snow Mt. 1554 Comment
  CHSC117416  Agrostis avenacea B. Castro; Tom Boullion 2008-7-10 1762 Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, on W bank of the Sacramento River near Moon Bend at RM 141.4, just off Moon Bend Rd. 18 Comment
  CHSC94532  Agrostis avenacea Lowell Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD51826  Agrostis avenacea A. A. Beetle 1942-5-21 3274 Colusa 12 miles north of Williams. Comment
  JEPS110433  Agrostis exarata Lowell Ahart 2006-8-9 13167 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS80443  Agrostis exarata L. R. Heckard and J. C. Hickman 1980-9-15 5420 Colusa w of Summit Springs; Snow Mt. 1554 Comment
  CHSC94474  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SEINET3917542  Aira caryophyllea Donald Spalinger 1974-5-4 47 Colusa St. John Mt. quad. North fork Campground on Stony Creek. 1600.; 0 Comment
  CAS-BOT-BC445318  Alisma lanceolatum Milo S. Baker 1946-9-5 11631 Colusa Along Hiwy. bet. Colusa and Williams Comment
  UCD141857  Allium L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD57115  Allium Gordon Harrington; Diana Hickson 2007-4-7 0019 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  UCD82470  Allium Craig Thomsen; G. Harrington 2009-5-12 2847 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 707 Comment
  UC1299746  Allium amplectens Freed W. Hoffman 1948-6-27 2514 Colusa 8.6 mi sw Fouts Spring; North Coast Ranges, Upper Letts Valley Comment
  UCD138480  Allium amplectens G. L. Stebbins Jr. 1962-5-6 6024 Colusa along Highway No. 20, on south bank of Bear Creek, between Williams and Lower Lake, south of Wilbur Springs. 457 Comment
  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
  UCSB746  Allium bolanderi Keator, Glenn 1958-6-16 Colusa Just east of Lake-Colusa county line, on road from Lower Lake to Sacramento valley Comment
  UC1613362  Allium falcifolium Charles M. Belshaw April 1937 2865 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge 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
  POM174570  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford. Comment
  RSA256672  Allium falcifolium J. L. Hobson 1974-5-4 57 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 Comment
  UCD141835  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  UCD141854  Allium falcifolium Roman Gankin 1958-4-25 s.n. Colusa 4 miles west of Leesville. Near head of Bear Valley. 304 Comment
  SEINET12051857  Allium fimbriatum Unknown 1986-1 60124 Colusa W of Williams, Bear Valley area, Bear Valley Rd, ca .7 mi N of its origin at Rt.20 323 Comment
  UC725425  Allium fimbriatum var. purdyi A. A. Heller 1940-5-6 15579 Colusa summit of the grade on State Highway #20, at the Lake County Line State Highway #20, Lake County Line 232 Comment
  UCD57822  Allium fimbriatum var. purdyi Gordon Harrington 2007-4-17 33 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  UCD66911  Allium fimbriatum var. purdyi Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and WNW of Cowboy Camp on the west side of Bear Creek. 451 Comment
  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
  CDA11409  Allium serra G. F. Hrusa, K. van Katwyk 1995-4-22 12130 Colusa Inner North Coast Ranges; E base of ridge immed. E of Bear Valley, along Leesville Road. Comment
  CDA11415  Allium serra G. F. Hrusa, K. van Katwyk 1995-4-22 12136 Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 m. N of Hwy 20. Comment
  CHSC32954  Allium serra Teri Barowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 47 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  CHSC71010  Allium serra Vernon Oswald; Lowell Ahart 1998-5-7 8992 Colusa Lodoga-Leesville Rd. 4.3 mi south of Cooks Springs Rd. 469 Comment
  HSC67097  Allium serra Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 47 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
  UCD163211  Allium serra Craig D. Thomsen 2000-4-12 2145 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CAS-BOT-BC475548  Allium serra H. C. Cantelow 1936-4-11 1184 Colusa Bear Creek Canyon Comment
  HSC103590  Allium serra Thomas W. Nelson, Jane Nelson 1981-4-16 6413 Colusa Along Bartlet Springs-Bear Valley Rd., ~ 100 yds. from Bear Valley 610 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
  POM269061  Allium serra Lyman Benson 1933-4-16 4327 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  RSA550227  Allium serra D. W. McNeal, David W. Isle 1991-5-22 3821 Colusa Above highway 162, 4.3 miles east of the Stony Creek Bridge, north of Elk Creek. Comment
  UCD141798  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa ca. 8.8 miles west of Maxwell (U.S. Highway 99W) or ca. 0.6 mile east of Sites, about 180 feet northwest of bridge and old stone house. Comment
  UCD141815  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mile toward Clear Lake from junction of California Highway # 16 and # 20. Comment
  UCD141823  Allium serra L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa 1/2 mile east of Sites toward Maxwell. Comment
  UCD141826  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa ca. 8.8 miles west of Maxwell (U.S. Highway 99W) or ca. 0.6 mile east of Sites about 180 feet northwest of bridge and old stone house. Comment
  UCD141828  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa along road 3.2 miles past junction of California 16 and 20, toward Rumsey, SW part of county. Comment
  UCD141829  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa along road 3.2 miles past junction of California 16 and 20, toward Rumsey, SW part of county. Comment
  UCD15285  Allium serra Claire Warshaw 1985-4-13 9 Colusa along Bear Valley Road, 8 miles northwest from intersection with highway 20; 390 Comment
  CHSC90778  Allophyllum divaricatum D. Isle 2002-4-18 182 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, no. of Fouts Springs. 548 Comment
  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
  UCD84444  Allophyllum gilioides Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6052 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  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
  UCD110015  Alnus rhombifolia G. F. Hrusa 1996-1-23 12630 Colusa Inner North Coast Ranges. Riparian area of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. 475 Comment
  UCD163841  Alnus rhombifolia Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA11421  Alopecurus saccatus G. F. Hrusa, K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges; Low wet site in full sun along N side of Leesville Rd. approx. 4 m. NW of Hwy. 20. Annual. Comment
  RSA198503  Alopecurus saccatus Roxana S. Ferris 1917-8-12 549 Colusa 4 miles east of Williams, alkali plains. Comment
  UCR201557  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14271 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  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
  JEPS89498  Ambrosia psilostachya Dean W. Taylor 1989-8-6 10510 Colusa s.w. margin Delevan Nat'l Wildlife Refuge; Sacramento Valley, Delevan Nat'l Wildlife Refuge Comment
  POM50992  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UC71776  Ambrosia psilostachya H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS110091  Ammannia robusta Lowell Ahart 2006-8-9 13142 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724959  Ammannia robusta L. Ahart 2006-8-9 13142 Colusa north side and just east of the bridge across Stony Creek, just north of Stonyford. 348 Comment
  POM287422  Amsinckia intermedia Lyman Benson 1935-3-27 6331 Colusa 6 miles west of Williams. 213 Comment
  SFV3062  Amsinckia intermedia D. West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highways 16 and 20. 244 Comment
  UCD119708  Amsinckia intermedia David West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highway 16 and 20. 243 Comment
  CHSC86518  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1397 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 277 Comment
  CHSC86519  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1396 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 323 Comment
  JEPS102235  Amsinckia lunaris L. P. Janeway 2001-4-18 7024 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 274 Comment
  UC1199518  Amsinckia lunaris Annetta Carter 1938-5-8 1385 Colusa 3 mi n Leesville (on Lodoga Road) Comment
  UCD63713  Amsinckia lunaris Craig D. Thomsen 2008-3-30 2722 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, near ridgeline and headwaters of Eula Canyon drainage. 501 Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  RSA0089733  Amsinckia lunaris J. P. Smith, T. Nelson, Jane Nelson 1978-4-2 9575 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UC1084529  Amsinckia lycopsoides Peter Kamb 1952-5-25 2291 Colusa 1 mi e Lake County line (on Hwy 20) Comment
  UC1178228  Amsinckia lycopsoides Peter M. Ray 1950-4-15 1712 Colusa 1.5 mi s Lodoga (road to Leesville) 381 Comment
  UCD163216  Amsinckia menziesii Craig D. Thomsen 2000-4-28 2193 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC48170  Ancistrocarphus filagineus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3934 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  JEPS16206  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (w of base of grade to Indian Valley (Bartlett Mt. Road)) Bear Valley; Inner North Coast Ranges, Indian Valley, Bear Valley Comment
  UC1111603  Ancistrocarphus filagineus Herbert L. Mason 1941-4-5 12406 Colusa 3 mi s Stonyford Comment
  UC1613346  Ancistrocarphus filagineus Charles M. Belshaw 1937-4-1 2832 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Ranges, Devil's Ridge Comment
  UCD163684  Ancistrocarphus filagineus Craig Thomsen 1999-4-15 1985 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD166309  Ancistrocarphus filagineus Jack Major 1962-4-28 805 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 Comment
  RSA256677  Ancistrocarphus filagineus J. L. Hobson 1974-5-4 63 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 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
  CDA16107  Angelica tomentosa G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15246 Colusa North Coast Ranges; Little Stony Creek, approx. 1.5 mi. NE of Stonyford-Lodoga Rd. intersection. Sheet 1 of 2 350 Comment
  SD22373  Anthemis cotula Richard Neil 1938-6-20 Colusa Grimes 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
  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
  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
  RSA724838  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  CHSC91007  Aphanes occidentalis D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. 548 Comment
  UCD64506  Aphanes occidentalis Craig D. Thomsen 2000-3-31 2093 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC101627  Apiastrum angustifolium David W. Isle 2002-4-18 1656 Colusa Mendocino National Forest; N of Fouts Springs, n of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) N aspect of E drainage in chamise site burned during 8/8/01 Trough Fire and part of Hydromulch Soil Erosion Study Plot. 524 Comment
  JEPS87724  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  UCD170128  Apiastrum angustifolium Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  UC1051713  Apocynum cannabinum Helen K. Sharsmith 1953-6-19 4263 Colusa near confluence of N. and Middle forks of Stoney Creek Red Bridge Camp; Inner North Coast Ranges, Mendocino Nat'l Forest, Red Bridge 548 Comment
  JEPS80851  Arabis eschscholtziana L. R. Heckard and J. C. Hickman 1980-7-3 5370 A Colusa sw slope Snow Mt.; , Summit Springs 1554 Comment
  UCD19963  Arceuthobium campylopodum C. H. Lamoureux; R. Gankin 1956-3-16 1018 Colusa 2 miles west of junction of State Routes 16 and 20. 1 mile east of Lake County line. Comment
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1
  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
  JEPS73507  Arctostaphylos canescens subsp. canescens L. R. Heckard 1972-7-10 3124 Colusa on trail to Box Spring e Trout Creek crossing (Snow Mt.); , e of Trout Creek crossing on trail to Box Spring 1828 Comment
  JEPS117095  Arctostaphylos canescens subsp. sonomensis Peter Warner 2010-5-16 153 Colusa Walker Ridge Road, ~18.4 km N of jct. with Hwy. 20, along E (Colusa Co.) side of road, scattered on slopes above Zimory Canyon to the west, Trout Creek to east, and adjacent slopes on both sides of road Comment
  RSA670065  Arctostaphylos canescens subsp. sonomensis G. L. Webster 1989-5-6 7700 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  CDA16131  Arctostaphylos manzanita G. F. Hrusa 1999-2-13 14915 Colusa North Coast Ranges; along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  SEINET11989688  Arctostaphylos manzanita R. A. DeMartile 1982-1 s.n. Colusa between Ladoga & Goat Mt. lookout 792 Comment
  CHSC92611  Arctostaphylos manzanita subsp. elegans D. Isle 2005-7-14 1152 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Boardcamp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  JEPS73519  Arctostaphylos manzanita subsp. elegans L. R. Heckard 1972-7-10 3137 A Colusa between Foutch Camp and Trout Creek crossing; Snow Mt. 1828 Comment
  CAS-BOT-BC24378  Arctostaphylos manzanita subsp. manzanita Richard A. DeMartile 1982-10-10 s.n. Colusa Road between Ladoga and Goat Mountain Lookout. 914 Comment
  CAS-BOT-BC24379  Arctostaphylos manzanita subsp. manzanita A. A. Heller 1940-2-14 15499 Colusa Three mi. e. of the North Fork of Cache Creek Bridge on State Hwy #20. Comment
  CAS-BOT-BC24424  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-16 s.n. Colusa Hershey, se. Colusa Co. Comment
  UCR206665  Arctostaphylos manzanita subsp. manzanita George K. Helmkamp, E. A. Helmkamp 2009-3-17 14395 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  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
  CHSC92610  Arctostaphylos manzanita subsp. wieslanderi D. Isle 2005-7-14 1151 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Boardcamp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  CDA15497  Arctostaphylos patula G. F. Hrusa, T. D. Wilfred 1998-6-19 14634 Colusa North Coast Ranges; Goat Mtn. around summit region. 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
  UCD66999  Arctostaphylos viscida Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  UCD72420  Arctostaphylos viscida Ellen Dean; Gordon Harrington 2006-11-10 3311 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch, along ridge trail overlooking Cache Creek. 535 Comment
  CDA11231  Arctostaphylos viscida subsp. pulchella G. F. Hrusa 1989-2-11 5821 Colusa North Coast Ranges; Above Bear Creek, on Bear Valley Rd. approx. 1 mile N of Hwy 20. Comment
  JEPS87758  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald and Lowell Ahart 1994-3-23 6011 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  RSA589937  Arctostaphylos viscida subsp. viscida Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7301 Colusa Along Brim Rd., 1.9 mi. W juct . Bear Valley Rd. Comment
  JEPS80132  Arenaria congesta var. congesta L. R. Heckard with J. Hickman 1980-7-1 5291 Colusa Trail from Summit Springs Frog Pond ((ca. 10 mi w of Stonyford)); Snow Mt. 1737 Comment
  JEPS81416  Arenaria congesta var. crassula L. R. Heckard and J. C. Hickman 1982-7-9 6024 Colusa Goat Mt Goat Mt. (just east of Lookout) 1859 Comment
  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
  UC624278  Argemone rotundata L. Constance 1939-5-14 2490 Colusa 1 mi e of Mill Creek Ranger Station (Inner North Coast Ranges); Inner North Coast Ranges 548 Comment
  UCR119181  Aristida ternipes var. gentilis Beecher Crampton 1963-6-11 6851 Colusa Sacramento Valley, About 10 miles west of Williams on Leesville Road, Three Sisters Mountain area. 198 Comment
  CHSC86126  Aristida ternipes var. hamulosa Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  POM163496  Aristolochia californica Roxana S. Ferris 1926-4-22 s.n. Colusa Sycamore Slough near Sycamore Comment
  UC1950728  Aristolochia californica R. Schmid 2000-3-21 2010 -6 Colusa Cache Valley, on west side of HW 16, a few km north of county line Comment
  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
  CAS-BOT-BC90262  Artemisia douglasiana J. H. Thomas 1960-8-30 8862 Colusa About 2.4 miles NW of Sycamore on road to Colusa Comment
  RSA718056  Artemisia douglasiana L. Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  UCD84440  Asclepias eriocarpa Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6050 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  UCD121317  Asclepias fascicularis V. C. Bryant 1926-6-8 s.n. Colusa Colusa. Comment
  CAS-BOT-BC222852  Asclepias solanoana Volney Rattan 1884-6-1 s.n. Colusa Above Fonts Springs, Colusa, Coast Mts. North of San Francisco Bay Comment
  UCD58164  Asclepias speciosa Gordon Harrington 2007-5-15 54 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
  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
  SEINET12319578  Asteraceae K. A. Smail 1978-1 s.n. Colusa ca 0.3 mi W of jct Hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  UCD163230  Astragalus clevelandii Craig D. Thomsen 2001-5-24 2535 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
  JEPS120976  Astragalus gambelianus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18633 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
  SEINET7096743  Astragalus gambelianus A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UCD163837  Astragalus gambelianus Craig D. Thomsen 2001-4-12 2466 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCSC0010466  Astragalus gambelianus Dylan M. Neubauer, Tim Forsell 2016-3-31 597 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  HSC47646  Astragalus gambelianus J. P. Smith, J. O. Sawyer 1978-4-29 9790 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  RSA424724  Astragalus rattanii var. jepsonianus Aaron Liston, M. Blumler 1987-4-26 667 -3 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  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
  UC2029550  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-3-27 8764 Colusa Along State Highway 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Highway 20 and 53 Comment
  UC863114  Astragalus rattanii var. jepsonianus Alice Eastwood, John Thomas Howell 1938-5-16 5634 Colusa Lake--Colusa County line on road to Williams; road to Williams 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
  UCD64415  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  UCR212345  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  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
  UCD165928  Athysanus pusillus Ellen Dean; with T. Starbuck and D. McNair 2016-4-9 8833 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Southwest of intersection of Highway 20 and Highway 16. Near corral at Highway 20. 479 Comment
  UCD114250  Athysanus pusillus Kim E. Steiner 1978-4-29 198 Colusa Walker Ridge Rd., 1.5 mi. N of State Hwy 20. 777 Comment
  UCD63023  Athysanus unilateralis Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4675 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCD72509  Atriplex Craig D. Thomsen 2008-3-30 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCD66916  Atriplex argentea var. expansa Craig D. Thomsen; G. Harrington 2008-7-6 2783 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond ca. 0.2 miles to the south of Roadkill Cafe. 396 Comment
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Jun 8 2011
  CHSC61030  Atriplex coronata var. coronata Vernon H. Oswald; Mike Wolder, Joe Silveira. 1993-7-26 5701 Colusa Colusa National Wildlife Refuge. Tract 18 on the S side of the refuge, ca. 1 mi W of Ohm Rd., ca. 1 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  CHSC61039  Atriplex depressa Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5703 Colusa Colusa National Wildlife Refuge. W side of Pool 3 on the S end of the refuge near Ohm Rd., ca. 2 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  JEPS90590  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
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Jun 18 2015
  JEPS90596  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 Comment
  CHSC61038  Atriplex joaquinana Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5702 Colusa Colusa National Wildlife Refuge. W side of Pool 3 on the S end of the refuge near Ohm Rd., ca. 2 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  JEPS108753  Atriplex prostrata Lowell Ahart 2006-9-26 13347 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  RSA724831  Atriplex prostrata L. Ahart 2006-9-26 13347 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UC53770  Avena barbata J. Burtt Davy May 1898 4294 Colusa near Princeton Comment
  UCD57056  Avena barbata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3644 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  CHSC83697  Avena fatua L. P. Janeway 2002-4-24 7523 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD57660  Avena fatua Hildegarde Durkin; 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. North side of Thompson Creek. Side of trail. 373 Comment
  UCD66443  Avena fatua Craig D. Thomsen 2000-4-28 2212 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD82621  Avena fatua Craig Thomsen; G. Harrington 2009-5-12 2891 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  JEPS113773  Azolla filiculoides Lowell Ahart 2007-7-7 14260 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  UCD57655  Baccharis pilularis Hildegarde Durkin; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Where trail crosses Thompson Creek. 374 Comment
  HSC79084  Baccharis salicifolia C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 30 Colusa Mendocino National Forest, Digger Pine Campground, 10 miles SW of Stonyford via Lodoga-Stonyford and Goat Mtn. Rd. 457 Comment
  CHSC69867  Balsamorhiza macrolepis var. macrolepis B. Castro; B. Corbin, K. Earll, L. Hanson, D. Isle, L. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and Walker Ridge Rd. (Site is a few hundred feet E of Lake Co. line.) 716 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
  CHSC84434  Bassia hyssopifolia Lowell Ahart 2003-8-15 10509 Colusa On the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  CHSC84963  Bergia texana Lowell Ahart 2003-10-23 10670 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
  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
  JEPS104404  Bergia texana Lowell Ahart 2003-10-23 10670 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
  RSA74341  Bidens frondosa Milo S. Baker 1946-9-4 11612 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  JEPS73511  Boechera breweri subsp. breweri L. R. Heckard 1972-7-10 3129 Colusa 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  JEPS15272  Boechera breweri subsp. shastaensis Rimo Bacigalupi G. L. Stebbins and Peter Kamb 1950-4-16 3106 Colusa ridge n Red Bridge Camp (between and above the confluence of the N and Middle Forks of Stony Creek, nw Colusa Co., very close to Glenn Co. line); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  JEPS80391  Boechera repanda L. R. Heckard, and J. Hickman 1981-6-22 5624 Colusa Dark Hollow trail Snow Mt. 1965 Comment
  CHSC96369  Boehmeria cylindrica D. Koenig; L. Bateman 2006-10-13 Colusa Sacramento Valley. By a slough along the west side of the Sacramento River, about 0.5 mi south-southeast of Stegeman. 21 Comment
  RSA0105548  Boehmeria cylindrica B. Castro, Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  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
  CHSC94729  Bolboschoenus glaucus Lowell Ahart 2006-9-26 13351 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  JEPS101904  Bolboschoenus glaucus Dean W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, along Ohm Road 39 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-BC322142  Bolboschoenus maritimus Peter Rubtzoff 1965-9-14 5651 Colusa 4.5 miles from Hwy. 20 on the road to Wilbur Springs. Comment
  CHSC107167  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-4-27 10245 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. In 6-10 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  UCD67058  Bolboschoenus maritimus subsp. paludosus Craig D. Thomsen 2008-5-23 2755 Colusa BLM Payne Ranch. Destanella Flat, just south of Hwy 20, 2.5 miles west of Hwy 16. 522 Comment
  CAS-BOT-BC418408  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  CAS-BOT-BC418409  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCR206291  Brassica juncea George K. Helmkamp, E. A. Helmkamp 2009-5-20 14737 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCR206539  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14313 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC106348  Brickellia californica A. J. Bassinger 1927-10-29 s.n. Colusa Sand Creek, Coast Range Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 Comment
  JEPS7632  Brodiaea elegans subsp. elegans W. L. Jepson 1920-5-23 8961 Colusa foothills near Mountain House (sw Colusa Co.); Venado Comment
  UC1051716  Brodiaea elegans subsp. elegans Helen K. Sharsmith 1953-6-19 4268 Colusa near confluence of North and Middle Forks of Stoney Creek; Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  CHSC112309  Bromus arenarius Lowell Ahart 2013-5-1 18685 Colusa Inner North Coast Range. In a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS110141  Bromus arenarius Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  RSA724892  Bromus arenarius L. Ahart 2006-8-22 13216 Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD37189  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa Colusa County, 5.8 miles south of Lodoga. Comment
  UCD57578  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Along State Hwy. 16. 12 miles northwest of Rumsey. Comment
  UCD66931  Bromus caroli-henrici Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5080 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Northwestern part of ranch, along ridge trail on border of Lake and Colusa Counties. South of junction with trail that heads down to the headwaters of Thompson Creek. 633 Comment
  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
  UCD57554  Bromus hordeaceus Cindy Yip; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  UCD58684  Bromus hordeaceus A. A. Beetle 1942-5-21 3272 Colusa 12 miles north of Williams. 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
  UCD63103  Bromus japonicus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4934 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
  UCR228650  Bromus japonicus Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4934 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 348 Comment
  JEPS80797  Bromus laevipes L. R. Heckard and J. C. Hickman 1981-7-30 5767 Colusa se side of Snow Mountain, along Trout Creek Trout Creek; Snow Mountain, Trout Creek 1554 Comment
  UCD58884  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa Inner North Coast Ranges. Mendocino National Forest. Red Bridge Camp. Near confluence of North and Middle forks of Stoney Creek. 548 Comment
  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
  UCD59017  Bromus madritensis Beecher Crampton 1958-5-19 4791 Colusa 10.1 miles southeast of Leesville. Comment
  CHSC100274  Bromus madritensis subsp. rubens D. Isle 1988-4-13 1515 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  HSC45668  Bromus madritensis subsp. rubens Stephen Plant 1978-4-22 214 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC94534  Bromus tectorum Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS80193  Bromus tectorum L. R. Heckard and J. Hickman 1980-7-3 5346 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw Snow Mountain); Snow Mountain 1548 Comment
  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
  UCD59764  Bromus tectorum Beecher Crampton 1958-5-19 4808 Colusa West of Lodoga. Comment
  UCD65639  Bromus tectorum Craig D. Thomsen 2000-4-28 2174 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  SBBG128801  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa N sie 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
  JEPS52594  Calandrinia ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  SD149215  Calandrinia ciliata Hershkovitz 1991-5-3 Colusa Walker Ridge, along Walker Ridge Road near turn-off to Bear Valley on north end. Comment
  UCD100191  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Bear Valley, along Bear Valley Rd. Comment
  UCD100193  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Walker Ridge, along Walker Ridge Rd. nr. Turn-off to Bear Valley on north end; serpentine site. Comment
  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
  CAS-BOT-BC167285  California macrophylla Roxana S. Ferris 1926-4-23 6406 Colusa Grade beyond the Mountain House on Williams - Stonyford Road Comment
  UCD103570  California macrophylla Craig Thomsen 2011-3-28 s.n. Colusa BLM Bear Creek (formerly Payne) Ranch. W of intersection of Hwys 16 and 20; E side of 'Serpentine Creek.' Drainage runs north from Bear Creek Ranch flowing under pull out along Hwy 20. 335 Comment
  NY465060  Callitriche marginata A. A. Heller 1902-5-2 5440 Colusa Princeton Comment
  RSA135689  Callitriche marginata A. A. Heller, H. E. Brown 1902-5-2 9382 Colusa Princeton. Comment
  UC1101520  Callitriche marginata S. Galen Smith and G. T. Robbins 1950-4-15 1906 Colusa Bear Valley Comment
  CHSC112277  Calochortus amabilis Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18640 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
  CHSC2225  Calochortus amabilis V. Holt 1946-4-18 Colusa Cache Creek. 243 Comment
  CHSC49642  Calochortus amabilis Vernon Oswald 1986-5-12 2007 Colusa Brim Rd, (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  RSA0014524  Calochortus amabilis Joan Stewart 1998-6-10 759 Colusa Bear Valley Comment
  JEPS61681  Calochortus luteus W. L. Jepson 1920-5-23 8969 Colusa 2-3 mi sw Leewville (at foot of Bartlett grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  CHSC28483  Calochortus splendens Timothy Spira; Robert Schlising 1978-5-13 3247 Colusa Ca. 0.5 mi NW jct Hwy 20 and Bear Valley (=Wilber Springs) Road, along latter. Comment
  CHSC80106  Calochortus splendens L. P. Janeway; Joyce Lacey-Rickert 2000-6-1 6779 Colusa Vicinity of Grapevine Creek, Scotties Canyon, and Rena Canyon. 243 Comment
  RSA0118781  Calochortus splendens Lowell A. Ahart 2013-5-1 18683 Colusa On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  UC1562598  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UCD146722  Calochortus splendens G. F. Hrusa 1998-6-19 14612 Colusa above upper Little Stony Creek. Goat Mountain Road around 1.5 km west of campground. 485 Comment
  UCD63117  Calochortus splendens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4948 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. 401 Comment
  CAS-BOT-BC483484  Calochortus splendens Volney Rattan 1884-6-1 s.n. Colusa Above Fouts Springs, Coast Mts. north of San Francisco Bay 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
  UCD66859  Calochortus superbus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5062 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Destinella Flat, on the west side of main drainage. 579 Comment
  UC1051690  Calochortus tolmiei Helen K. Sharsmith 1953-6-19 4289 Colusa Old Mill Campground, Trough Springs Ridge Inner North Coast Ranges, Mendocino National Forest 1219 Comment
  CHSC82628  Calochortus uniflorus Tara Morgan 2002-4-1 18 Colusa Found in Bear Valley located west of Highway 5 and north of Highway 20 within pastures. 385 Comment
  HSC83384  Calochortus uniflorus Bob Wych 1975-4-20 16 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. Comment
  RSA296716  Calochortus uniflorus Thomas Wood 1979-4-14 110 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  UCD82499  Calochortus uniflorus Craig Thomsen; G. Harrington 2009-5-12 2858 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD83629  Calochortus uniflorus Fanny Ye; with PLB 102 class 2010-5-2 1 Colusa E slope of Walker Ridge. Eaton Springs. On edge of campsite/parking area. 709 Comment
  SEINET3992250  Calochortus uniflorus Rimo Bacigalupi, T. Crovello, L Heckard 1965-4-26 9045 Colusa 4.0 mi south of point at which road takes off westward to Bartlett Springs; Bear Valley Comment
  SEINET5725036 Image available Calochortus uniflorus S. L. Morrison 1974-1 4 Colusa Wilbur Springs Road, 9.6 miles from the Bear Valley Road and State Highway 20 intersection via Bear Valley Road. Comment
  UCD69191  Calycadenia multiglandulosa P. Rodriguez-Rojo; D. Sanchez-Mata 1997-7-25 s.n. Colusa Clear Lake-Williams. Southward Bear Valley Rd. D 415 Comment
  CDA15459  Calycadenia pauciflora G. F. Hrusa, T. D. Wilfred 1998-6-19 14595 Colusa North Coast Ranges; Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. Comment
  RSA0118882  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 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
  UC1552845  Calycadenia pauciflora Frederica Bowcutt 1985-6-19 605 Colusa just sw, n of Wilbur Hot Springs about 2 air miles Bear Valley Comment
  UC89057  Calycadenia pauciflora T. S. Brandegee May 1884 Colusa near Mountain House; West Colusa County Comment
  UCD129829  Calycadenia pauciflora Gerald D. Carr 1972-6-14 703 Colusa at the Lake County line on Highway 20. Comment
  UCD61447  Calycadenia pauciflora Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3892 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  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
  UCD84638  Calycadenia pauciflora G. Harrington 2009-7-7 85 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
  CAS-BOT-BC270745  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles S of Bartlett Springs Road on Walker Ridge Road, Buck Flat 868 Comment
  CAS-BOT-BC270746  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile E of Lake County line on Bartlett Springs Road Comment
  RSA255558  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 miles east of Lake County line on Bartlett Springs Road Comment
  RSA255559  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs road on Walker Ridge Road, Buck Flat 869 Comment
  RSA255608  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles west of Lodoga on road to Stoneyford 412 Comment
  RSA255612  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Creek Trail, 0.5 miles NW of driveway to Fout Spr. Boy's Ranch 503 Comment
  RSA788191  Calycadenia pauciflora R. L. Carr 1978-8-20 2156 Colusa Bear Valley Rd, 0.1 mi N of jct with Brim Rd (to Bartlet Springs), ca. 2 mi SW of Leesville, (=GDC 651). 451 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  UC1876242  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 mi W of Leesville-Lodoga Rd. on road to Cooks Springs. Comment
  UC1876244  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 mi E of Walker Ridge Rd. on Deadshot Rd. 731 Comment
  UC1876260  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 mi W of Stoneyford on road to Fout Spring. 609 Comment
  UC1876261  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Cr. Trail, 0.5 mi NW of driveway to Fout Spr. Boys Ranch 502 Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UCD129870  Calycadenia pauciflora R. L. Carr 1978-8-20 2155 Colusa Brim Road (to Bartlett Spring), 1.5 miles west of junction with Bear Valley Road, around 3.6 miles southwest of Leesville. 482 Comment
  UCD63711  Calycanthus occidentalis Craig D. Thomsen 2008-3-20 2713 Colusa BLM Payne Ranch. South of Hwy 20, 0.5 mile south of intersection of Hwy 16 and Hwy 20 (Colusa Co. milepost 2.63). Approximately 200 meters upstream from where UTM data point was taken. 500 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
  UC1299369  Calyptridium monospermum Freed W. Hoffman 1948-6-26 2512 Colusa western Goat Mountain Goat Mountain Comment
  HSC72507  Calyptridium quadripetalum Thomas W. Nelson, Jane P. Nelson 1980-6-24 5880 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  IRVC29689  Calyptridium umbellatum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5029 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  UCD57819  Calystegia collina Gordon Harrington 2007-4-17 31 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. 527 Comment
  HSC48190  Calystegia collina subsp. collina Thomas W. Nelson, Jane Nelson 1978-4-29 3965 Colusa Along Hwy. 20 just E of Colusa-Lake Co. line 549 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
  JEPS94202  Calystegia collina subsp. oxyphylla Vernon Oswald and Lowell Ahart 1998-5-7 9000 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
  UCD126150  Calystegia occidentalis Collector Unknown 1918-1 s.n. Colusa Bear Valley. 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
  HSC44461  Camissonia contorta R. York 1978-4-22 134 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
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Jul 20 2020
  CHSC112226  Camissoniopsis hirtella Lowell Ahart 2013-5-1 18671 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
  CHSC79532  Camissoniopsis hirtella B. Castro; L. P. Janeway 2000-5-4 1134 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC112275  Campanula angustiflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS121118  Campanula griffinii Lowell Ahart 2013-5-1 18690 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD56906  Capsella bursa-pastoris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3509 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD64045  Capsella bursa-pastoris Craig D. Thomsen 2000-3-8 2037 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  UCR238927  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2012-2-9 18532 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CHSC87152  Cardamine oligosperma Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  CDA30193  Cardaria chalepensis D. Isle 2007-4-13 1633 Colusa East of Maxwell ~ 1 mile; south of Maxwell Road and East of Lyons Road in ditch between rice fields east of William Dirk s shop. Comment
  JEPS117891  Cardaria draba David Isle 2007-4-13 1633 Colusa E of Maxwell 1 mi S of Maxwell Rd. & E of Lyons Rd. in ditch between rice fields E of William Dirk's shop Sacramento River Watershed 100 Comment
  CDA6843  Carduus acanthoides G. D. Barbe, N. Palmer 1982-6-4 3639 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  SEINET10644548  Carex Roxana S. Ferris 1917-4-17 Ferris 607 Colusa Moist earth in an oak grove. Sycamore Slough. Comment
  CAS-BOT-BC19165  Carex barbarae Roxana S. Ferris 1926-4-22 6315 Colusa Near Sycamore. Comment
  UC596489  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek Comment
  JEPS63533  Carex barbarae W. L. Jepson 1934-7-28 14747 Colusa Cortina Velly, hills SE of Colusa county Comment
  CHSC79590  Carex bolanderi L. P. Janeway 2000-5-31 6772 Colusa High North Coast Ranges. At Trough Spring; about 8.9 km southwest of Stonyford. 1049 Comment
  JEPS101036  Carex deweyana subsp. leptopoda Dean W. Taylor 1992-6-10 12699 Colusa Highway 162, Alder Springs Road, ca. 2 miles west from junction with Grindstone Road, 1371 Comment
  CHSC92529  Carex feta G. F. Hrusa; WTD 1998-6-19 14619 Colusa Wet area on spring along Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). 975 Comment
  JEPS75128  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa n side of the ridge separating Trout Creek and Paradise Creek (the highest of two mossy spring areas crossing trail from Fouts Camp to Box Springs); Snow Mountain 1676 Comment
  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
  CAS-BOT-BC35776  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa Snow Mt.;northeast slope of West Peak 2072 Comment
  CAS-BOT-BC31581  Carex luzulina var. luzulina L. R. Heckard 1972-7-10 3113 Colusa Trout Creek crossing of trail to Box Spring, Snow Mt. 1828 Comment
  JEPS75121  Carex luzulina var. luzulina L. R. Heckard 1972-7-10 3113 Colusa 1859 Comment
  CAS-BOT-BC119425  Carex obnupta Roxana S. Ferris 1917-4-15 607 Colusa Sycamore Slough. 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
  UCD163855  Carex praegracilis Craig D. Thomsen 2001-4-12 2472 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD63112  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4943 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. 384 Comment
  UCD82623  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2893 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  RSA262496  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  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
  UCD57291  Carex serratodens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3662 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 319 Comment
  UCD67061  Carex serratodens Craig D. Thomsen 2008-3-20 2715 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  UCD82514  Carex serratodens Craig Thomsen; G. Harrington 2009-5-12 2872 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  JEPS75135  Carex subfusca L. R. Heckard 1972-7-8 3040 a Colusa on n side of ridge running se West Peak; Snow Mt. 2011 Comment
  CDA15498  Carex tumulicola G. F. Hrusa, T. D. Wilfred 1998-6-19 14635 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  CHSC92497  Carex tumulicola G. F. Hrusa; WTD 1998-6-19 14635 Colusa Occasional on stream/seep near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. 1710 Comment
  CAS-BOT-BC249071  Castilleja affinis Roxana S. Ferris 1917-4-19 574 Colusa 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  HSC45686  Castilleja applegatei Patricia Shesgreen 1978-4-22 38 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CDA12181  Castilleja applegatei subsp. martinii G. F. Hrusa 1993-5-2 10863 Colusa Frenzel Creek Research Natural Area; Point of ridge above mouth of Frenzel Creek, tributary of Little Stony Creek. S. side of creek. Comment
  HSC72113  Castilleja applegatei subsp. martinii J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9557 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC71313  Castilleja applegatei subsp. martinii Thomas W. Nelson, Jane P. Nelson 1979-4-11 4612 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville 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
  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
  UC719289  Castilleja attenuata F. G. Meyer 1938-4-5 1348 Colusa about 20 mi n Williams Comment
  UC76125  Castilleja attenuata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD83624  Castilleja attenuata Adam Clause; with PLB 102 class 2010-5-2 3 Colusa Walker Ridge. Eaton Springs.15 meters north of the main road, on the flat valley floor. 709 Comment
  CHSC27511  Castilleja exserta Michael F. Henetz 1978-4-15 8 Colusa Ca. 150 m s of Hwy. 20, ca. .5 km w of junction of Hwy. 20 and Hwy. 16, ca. 29 km s of Williams. S central border of Section 36. 332 Comment
  UC1053455  Castilleja exserta Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3165 Colusa 8 mi nw Maxwell (along road to Sites, in canyon between first hills on extreme w edge of the Sacramento Valley); Sacramento Valley Comment
  UCR37943  Castilleja exserta Mike Malamus, P. Williams, Brian Kearney 1984-4-29 70 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  UCD40887  Castilleja exserta R. Rhode 1984-4-21 s.n. Colusa 10 miles north of intersections of highways 16 and 20 in Bear Valley. 426 Comment
  CHSC115373  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-10 20026 Colusa Normal size plants, on dry grassy soil. 407 Comment
  HSC96792  Castilleja exserta subsp. exserta J. Carey, A. Hong, J. Leffingwell 1995-4-1 29 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  JEPS10303  Castilleja exserta subsp. exserta W. L. Jepson 1932-5-8 16282 Colusa Stonyford 365 Comment
  JEPS124296  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-10 20026 Colusa About 4 mile south of Lodoga. Comment
  RSA794941  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2011-4-1 17125 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  SEINET3079797 Image available Castilleja exserta subsp. exserta L. Blackford, S. Branch, D. Malm 1988-4-17 73 Colusa 1.3 miles south of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. 396 Comment
  HSC67098  Castilleja exserta subsp. exserta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 42 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  CHSC82623  Castilleja foliolosa Tara Morgan 2002-4-1 24 Colusa Found on the side of Bear Valley Rd. located northeast of Bear Creek, south of Bear Valley. 350 Comment
  RSA0115084  Castilleja foliolosa Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18642 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
  UCR206722  Castilleja foliolosa George K. Helmkamp, E. A. Helmkamp 2009-3-17 14394 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
  UCD148585  Castilleja miniata G. F. Hrusa 1994-11-7 11991 Colusa Frenzel Creek Research Natural Area. Little Stony Creek, approximately 2 miles above Stonyford-Lodoga Rd. on Goat Mountain Road. 134 Comment
  RSA0037133  Castilleja miniata subsp. miniata David W. Isle 2013-8-23 2049 Colusa W bank Salt Ck, ~150'NE of Dennis Dr Bridge on Isle Property. 374 Comment
  JEPS93868  Castilleja minor subsp. spiralis Vernon H. Oswald and Lowell Ahart 1998-7-15 9271 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UC198199  Castilleja minor subsp. spiralis Katharine Brandegee 1910-8-10 Colusa Epperson's Grade; sw Colusa Co. Comment
  UC1238903  Castilleja rubicundula subsp. lithospermoides Freed W. Hoffman 1947-6-19 1657 Colusa Cook's Springs North Coast Ranges (w Colusa County) Comment
  UCR40060  Castilleja rubicundula subsp. lithospermoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 27 Colusa Bear Valley, Brim Road, 2.9 mi west of Leesvillle-Lodoga Junction 418 Comment
  HSC45508  Castilleja rubicundula subsp. lithospermoides M. Alcasas 1978-4-23 60 Colusa Bear Valley Rd., 4.7 mi. from Barlett Springs Rd. 457 Comment
  UCD123056  Castilleja rubicundula subsp. lithospermoides Barrie Stanford 1966-4-16 27 Colusa Bear Valley, 5 miles north of Wilbur Springs. 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
  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
  SBBG111289  Castilleja rubicundula subsp. rubicundula J. M. Tucker 1980-5-3 4444 Colusa Bear Valley, 4.3 mi S of jct of Brim and Bear Rds, along W side of valley Comment
  UCD57296  Castilleja rubicundula subsp. rubicundula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3667 Colusa BLM Payne Ranch. Near origin of Craig Canyon. Close to Thompson Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 349 Comment
  CDA11400  Castilleja tenuis G. F. Hrusa, K. van Katwyk 1995-4-22 12120 Colusa Inner North Coast Ranges; flat on Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  SEINET10539694  Caulanthus Katherine L. Morris 1973-6-6 Morris 385 Colusa Chaparral woodland and sparse oaks; on hwy 20, 0.3 mi e of lake county line. Comment
  CHSC112311  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  UCD21573  Caulanthus lasiophyllus Craig D. Thomsen 2003-5-8 s.n. Colusa En route to Wilbur Hot Springs, approx 1/8 mile west of Bear Valley Rd on Wilbur Springs Rd. Open grassland at base of slope. 396 Comment
  CAS-BOT-BC48830  Ceanothus cuneatus Roxana S. Ferris 1917-4-14 572 Colusa foothills 7 mi west of Arbuckle - Rumsey Road Comment
  CDA12246  Ceanothus cuneatus G. F. Hrusa 1989-2-7 5808 Colusa Inner North Coast Ranges; Leesville Road between Bear Valley & Williams. Comment
  UCD111738  Ceanothus cuneatus Beecher Crampton 1975-4-21 9165 Colusa 4 miles N.N.E. of Lodoga. 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
  UCD170262  Ceanothus integerrimus D. O. Burge 2016-11-3 2186 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 610 Comment
  UCD170264  Ceanothus integerrimus D. O. Burge 2016-11-3 2188 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 980 Comment
  UCD82544  Ceanothus integerrimus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5699 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  SEINET11191747  Ceanothus integerrimus C. L. Schmidt 1989-5-6 1244 Colusa Between Stonyford and Fouts Springs. 600 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
Read comments
Aug 18 2014
  UCD112067  Ceanothus jepsonii D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  HSC60452  Ceanothus jepsonii var. albiflorus J. P. Smith 1977-4-24 9036 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD66479  Centaurea calcitrapa Craig D. Thomsen 2001-5-6 2556 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. 310 Comment
  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
  CHSC94445  Centaurea solstitialis Lowell Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC73978  Centaurea solstitialis H. P. Chandler 1905-9-14 Colusa Princeton Comment
  SEINET10798227  Centaurea solstitialis Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 376 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  RSA135479  Centaurium trichanthum Volney Rattan 1884-1 s.n. Colusa Stony Creek. Comment
  RSA92959  Centaurium trichanthum Milo S. Baker 1941-7-8 10115 Colusa Colusa County: roadside ditch Bear Valley in adobe, S of Lodoga Comment
  UCD18849  Centromadia fitchii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 157 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001. Comment
  CAS-BOT-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
  CAS-BOT-BC271546  Centromadia parryi subsp. rudis A. A. Heller 1941-9-22 16331 Colusa Along U.S. Highway #99W between Williams and Maxwell Comment
  CAS-BOT-BC271547  Centromadia parryi subsp. rudis H. M. Hall 1930-9-25 12894 Colusa One-half mile north of Arbuckle Comment
  CHSC84391  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  SBBG119873  Centromadia parryi subsp. rudis L. Ahart 2003-8-15 10510 Colusa S side of St Hwy 20, ca. 1 mi SW of Williams 27 Comment
  UC727676  Centromadia parryi subsp. rudis Milo S. Baker 1946-9-5 11624 Colusa 3 mi w of Colusa; Williams Comment
  UCD162396  Centromadia parryi subsp. rudis Juliette Robinson 2013-10-8 2 Colusa Along Highway 20, just east of I-5. 19 Comment
  UCD16094  Centromadia pungens J. Schmierer 1999-4-27 s.n. Colusa Exact location unknown. Comment
  CAS-BOT-BC279206  Centromadia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa Comment
  JEPS38150  Centromadia pungens subsp. pungens W. L. Jepson 1934-5-3 16600 Colusa n of Colusa (Stegeman Station) Comment
  CAS-BOT-BC279207  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa 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
  UC1299375  Cephalanthera austiniae Freed W. Hoffman 1948-6-27 2525 Colusa 8.6 mi. s.w. Fouts Springs (Upper Letts Valley); w. Colusa Co., Upper Letts Valley 1310 Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. Comment
  UCD137756  Ceratophyllum demersum J. S. Jones 1926-7-16 s.n. Colusa Colusa. Comment
  SFV8462  Cercis occidentalis R. D. Deragisch 1969-4-20 12 Colusa Near Bear Creek Bridge on CA State Highway 16, about 2 miles north of Colusa-Yolo County line. 152 Comment
  CHSC1542  Cercocarpus betuloides E. Gabel 1935-5-10 Colusa Stonyford. 335 Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain Comment
  HSC45751  Chaenactis glabriuscula var. glabriuscula Sheila Logan 1978-4-22 82 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC630425  Chaenactis glabriuscula var. heterocarpha Annetta Carter 1938-5-8 1394 Colusa 4 mi se of Wilbur Springs; Inner North Coast Ranges, Bear Creek Canyon Comment
  UC638668  Chaenactis glabriuscula var. heterocarpha Ethel Crum 1938-5-7 2014 Colusa 4.2 mi n of Rumsey; Inner North Coast Ranges, Comanche Hills 254 Comment
  UCD81859  Chaenactis glabriuscula var. heterocarpha Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5743 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  UCD82735  Chaenactis glabriuscula var. heterocarpha Craig Thomsen; G. Harrington 2009-5-14 2916 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  UC625471  Chaenactis glabriuscula var. heterocarpha Frank W. Gould 1938-4-23 289 Colusa a few mi from the Yolo County line (on road from Rumsey to Arbuckle) Comment
  UC725604  Chaenactis glabriuscula var. heterocarpha A. A. Heller 1940-5-6 15580 Colusa a few yards e of the Lake County line 232 Comment
  CAS-BOT-BC277632  Chaenactis glabriuscula var. megacephala James Jokerst 1985-4-4 220 Colusa Near Rail Canyon Comment
  JEPS90921  Chamaesyce hooveri Dean W. Taylor 1993-8-31 14071 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  CHSC113046  Chamaesyce maculata Lowell Ahart 2013-10-1 19103 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
  UC727669  Chamaesyce nutans Milo S. Baker 1946-9-4 11606 Colusa near locked gate Colusa Gun Club (Butte Sink); Butte Sink Comment
  CHSC113044  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 A Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC113045  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC61423  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Joseph Silveira 1993-8-16 5803 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. On the N bank of Hunters Creek. 24 Comment
  CHSC77333  Chamaesyce serpillifolia subsp. serpillifolia Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC94456  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13115 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104407  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2003-10-23 10665 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
  JEPS108744  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13104 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  JEPS108745  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13115 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC535094  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 564 Colusa about 7 mi n Leesville; Indian Creek 289 Comment
  JEPS75724  Cheilanthes gracillima L. R. Heckard 1974-9-9 3859 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt 1828 Comment
  UC72555  Chenopodium ambrosioides H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS110092  Chenopodium botrys Lowell Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA718051  Chenopodium botrys L. Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  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
  CHSC32207  Chenopodium hians James Jokerst 1980-8-7 1065 Colusa North Coast Range. Near Snow Mountain. Comment
  JEPS75836  Chenopodium pumilio L. R. Heckard 1974-9-11 3951 Colusa edge of meadow just e Foutch Camp; Snow Mt. 1859 Comment
  UCR228651  Chlorogalum pomeridianum Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4933 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 348 Comment
  CDA39317  Chlorogalum pomeridianum T. C. Fuller 1958-5-27 3661 Colusa South of Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  UCD63132  Chlorogalum pomeridianum var. pomeridianum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4933 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  CAS-BOT-BC238007  Chloropyron palmatum Dean Wm. Taylor 1988-8-8 10024 Colusa Sacramento Valley. Colusa National Wildlife Refuge, in the far SE corner of the Refuge along Ohm Road 1 mile N of Ware Road 22 Comment
  SEINET10745049  Chloropyron palmatum R. Stinchfield 1916-6-17 Stinchfield 284 Colusa In alkaline soil, overflowed lands at Tule near College City Comment
  CHSC77613  Chorizanthe membranacea Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. Shale slope in blue oak woodland. 167 Comment
  JEPS57654  Chorizanthe membranacea W. L. Jepson 1932-5-7 16263 Colusa valley 2 mi above Venado (western Colusa County) Comment
  UC638667  Chorizanthe membranacea Ethel Crum 1938-5-7 2015 Colusa 4.2 mi n Rumsey (Comanche Hills); Inner North Coast Range, Comanche Hills 254 Comment
  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
  RSA96824  Chrysothamnus nauseosus subsp. albicaulis Percy C. Everett, E. K. Balls 1954-10-17 20333 Colusa 9.1 miles SW of boundary of Mendocino National Forest, road from Stonyford to Upper Lake 793 Comment
  CAS-BOT-BC279829  Cichorium intybus Roxana Stinchfield 1916-6-18 295 Colusa Near College City Comment
  UCD159331  Cirsium cymosum D. S. Park 2010-6-5 115 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  CDA1159  Cirsium cymosum T. C. Fuller 1958-6-16 1848 Colusa Hillside above Hwy. 20; 2 mi. W/ Cache Creek Bridge. 0 Comment
  CDA1191  Cirsium douglasii var. breweri G. D. Barbe, Daryl Brown 1982-7-2 3892 Colusa Lower Letts Lake, Mill Valley Campground. Comment
  JEPS81287  Cirsium occidentale var. venustum L. R. Heckard and J. C. Hickman 1982-7-5 5898 Colusa slope below (s of) area Summit Springs (s side of mountain); Snow Mt., Summit Springs 1500 Comment
  UCD58173  Cirsium occidentale var. venustum Gordon Harrington 2007-5-31 63 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  CAS-BOT-BC286379  Cirsium occidentale var. venustum Roxana S. Ferris 1926-4-23 6459 Colusa On Stony Creek Comment
  CAS-BOT-BC228699  Cistanthe umbellata Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5029 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
  UC71781  Citrullus colocynthis var. lanatus H. P. Chandler Oct. 1905 Colusa Princeton Comment
  UCD105130  Clarkia G. L. Stebbins Jr.; M. A. Nobs, J. A. Rattenbury 1947-4-27 3735 Colusa 3 miles W of Leesville, on road to Bartlett Springs. Comment
  CHSC79776  Clarkia affinis L. P. Janeway; B. Castro 2000-5-3 6698 Colusa Vicinity of head of Antelope Creek, and Huffmaster Road. 335 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
  CAS-BOT-BC160914  Clarkia amoena subsp. amoena C. Hart Merriam 1923-1-1 s.n. Colusa Indian rancheria, Stony Ford Comment
  UCD82196  Clarkia concinna Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5696 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CDA329  Clarkia concinna G. D. Barbe 1982-6-4 3635 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  JEPS43608  Clarkia concinna subsp. concinna W. L. Jepson 1920-5-23 8973 Colusa hills between Bear Valley and Stanton Valley Comment
  JEPS90048  Clarkia concinna subsp. concinna Dean Wm. Taylor with Glenn Clifton 1990-6-11 11222 Colusa along Goat Mountain Road 2.9 mi w from junction of Logada-Stonyford Road 0.1 mi downstream w confluence of Frenzel Creek, Little Stony Creek drainage Frenzel Creek; North Coast Ranges, Frenzel Creek Research Natural Area 441 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
  HSC66132  Clarkia gracilis Cathie Goldberg, Lynn Kunstman, Geoff Walsh, Lauren Philbrick 1980-4-19 52 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  SBBG4972  Clarkia gracilis H. and M. Dearing 1939-5-12 3330 Colusa 20 mi N of Williams Comment
  UCD104545  Clarkia gracilis K. Esau 1934-5-5 s.n. Colusa West of Williams, Tahoe-Ukiah Highway. Comment
  CAS-BOT-BC164528  Clarkia gracilis subsp. albicaulis Richard A. DeMartile 1983-6-15 107 Colusa Bartlett Springs Road north of Baldy Mountain 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
  RSA41127  Clarkia gracilis subsp. gracilis Robert F. Hoover 1938-4-24 3231 Colusa Stone Corral Canyon below Sites. Comment
  JEPS122458  Clarkia gracilis subsp. sonomensis David Isle with F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of junction w/ Lodoga-Stonyford Road Comment
  CHSC79534  Clarkia gracilis subsp. tracyi G. F. Hrusa 1998-6-19 14597 Colusa Northern California. North Coast Ranges. Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. UTM: 10S, 05401 N, 43499 E. 400 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
  UCD70216  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC79779  Clarkia modesta L. P. Janeway; B. Castro 2000-5-4 6702 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 265 Comment
  UCD104856  Clarkia purpurea Kathryn Johnson 1966-5-14 53 Colusa Ca. 2 miles E of Lodoga on road from Maxwell. Comment
  CHSC85962  Clarkia purpurea subsp. quadrivulnera Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  UCD82122  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5650 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR257973  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen, Gordon Harrington 2009-5-12 2840 Colusa Walker Ridge. Eaton Springs, c. 1 mi east of Walker Ridge Road 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
  UC1299410  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa between Upper Letts Valley and Lower Letts Valley; North Coast Ranges Comment
  RSA537479  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  UCR206290  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2009-5-20 14738 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  SEINET199010  Claytonia exigua subsp. exigua H. K. Sharsmith 1953-6-19 4281 Colusa Mendocino National Forest ; Near Trough Springs on Trough Springs Ridge 975 Comment
  RSA614426  Claytonia exigua subsp. exigua K. L. Chambers 1988-3-24 5405 Colusa Hwy 20., ca. 22 mi. west of Williams, Inner Coast Range. Comment
  CHSC112251  Claytonia exigua subsp. glauca Lowell Ahart 2013-5-1 18672 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection with State Highway 20 and Bear Valley Road. 533 Comment
  CHSC62941  Claytonia exigua subsp. glauca Vernon H. Oswald; Lowell Ahart 1994-4-6 6055 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. Locally abundant on gravelly soil of a roadside bank. 463 Comment
  CDA12162  Claytonia parviflora G. F. Hrusa 1989-5-7 6090 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3 miles upstream from junction with Stonyford-Lodoga Rd. Comment
  UCD64520  Claytonia parviflora Craig D. Thomsen 2000-4-12 2126 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
  UCD67063  Claytonia parviflora Craig D. Thomsen 2008-3-20 2717 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 450 Comment
  CHSC91018  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. Comment
  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
  UCD56942  Claytonia perfoliata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3544 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 349 Comment
  UCD65634  Claytonia perfoliata Craig D. Thomsen 2000-4-12 2137 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS15557  Claytonia saxosa G. Thomas Robbins with L. R. Heckard 1956-7-25 3724 Colusa 0.25 mi s Snow Mt. West summit (on ridge forming s extension of Snow Mt. West, Lake-Colusa County boundary); Snow Mt. West 2103 Comment
  RSA114165  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Summit of Goat Mtn, Mendocino National Forest, lake - Colusa Boundary. 1865 Comment
  JEPS108908  Clematis ligusticifolia Lowell Ahart 2006-8-9 13094 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCD59793  Coix lacryma-jobi W. M. Mathisen 1921-11-1 s. n. Colusa Princeton. Comment
  CHSC25076  Collinsia grandiflora S. R. Poe 1974-3-30 27 Colusa Occuring frequently in open grassy fields, 22.5 mi. w of Williams, adjacent to highway 20. 243 Comment
  CHSC55589  Collinsia grandiflora Jennie J. Dubose 1991-4-6 20 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC57516  Collinsia grandiflora Lance E. Neuman 1987-4-4 5 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  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
  UCD81721  Collinsia greenei Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5725 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  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
  HSC44463  Collinsia heterophylla R. York 1978-4-22 141 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC86969  Collinsia heterophylla L. Blackford, S. Branch, D. Malm 1988-4-16 35 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  UC71624  Collinsia heterophylla Miss Alice King 1905-1 Colusa College City Comment
  UCD163219  Collinsia heterophylla Craig D. Thomsen 2001-4-12 2430 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
  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
  UCD82391  Collinsia heterophylla Craig Thomsen; G. Harrington 2009-5-12 2834 Colusa Colusa County. Walker Ridge. About 200 yds. south of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. 822 Comment
  UC2016539  Collinsia heterophylla Richard Olmstead 1984-4-28 523 Colusa North slope on Walker Ridge Road, ca. 2.4 miles north of CA 20. Road follows ridge that is Lake Co. - Colusa Co. line. Comment
  JEPS80140  Collinsia rattanii L. R. Heckard with J. Hickman 1980-7-2 5300 Colusa ca 10 mi w Stonyford (trail to Snow Mtn. peaks from Summit Springs); Colusa-Lake County Boudary 1661 Comment
  CHSC77468  Collinsia sparsiflora var. arvensis Vernon H. Oswald 2000-3-29 9905 Colusa Hwy. 20 600 ft west of Bear Creek, 0.25 mi west of Hwy. 16. 323 Comment
  CHSC86513  Collinsia sparsiflora var. collina B. Castro 2003-3-18 1384 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. Ca. 12 ft up from small drainage. 195 Comment
  UC103381  Collinsia sparsiflora var. collina Katharine Brandegee Colusa Eppersons Comment
  UCD57622  Collinsia sparsiflora var. collina Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  CDA14918  Collomia diversifolia G. F. Hrusa 1993-5-2 10854 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Comment
  CHSC70989  Collomia diversifolia Vernon Oswald; Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. At roadside. 524 Comment
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  HSC42333  Collomia diversifolia M. A. Baker 1977-4-24 223 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
Read comments
Jul 31 2014
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  UCD74342  Collomia diversifolia G. Ledyard Stebbins 1968-5-10 6686 Colusa South end of Walker Ridge, north of Hwy 20. Near headwaters of Sulphur Creek. (Note: notebook says date of collection was 10 May. Labels made by Stebbins at CAS say 15 May.) 762 Comment
  CAS-BOT-BC229534  Collomia diversifolia G. L. Stebbins 1968-5-15 6686 Colusa S end of Walker Ridge, N of State Highway 20 762 Comment
  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
  UCD57550  Convolvulus arvensis Andrew Pedersen; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek. 304 Comment
  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
  NY28942  Cordylanthus palmatus D. W. Taylor 1988-8-8 10024 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  RSA0084708  Cordylanthus palmatus Ellen Cypher 2005-8-22 2005 -023 Colusa Delevan National Wildlife Refuge, Tract 12, CNDDB EO# 13 18 Comment
  UC496162  Cordylanthus palmatus Roxana Stinchfield 1916-7-17 284 Colusa near College City; ; near College City, Colusa Co. Comment
  CHSC89300  Cordylanthus pilosus G. F. Hrusa; Dmitri Geltman 1999-8-18 15248 Colusa North Coast Ranges. Dedar Camp-Goat Mtn. Rd. Along roadside. 792 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
  JEPS66469  Cordylanthus pilosus subsp. pilosus G. D. Carr 1971-7-29 604 Colusa Lodoga, Lodoga-Stoneyford Rd 396 Comment
  JEPS68402  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3146 Colusa above Happy Camp (e end of Snow Mt.) 731 Comment
  JEPS68404  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3147 Colusa Ladoga 487 Comment
  UCD123108  Cordylanthus pilosus subsp. pilosus Frederica Bowcutt 1985-6-19 600 Colusa Just SW of Bear Valley. On ridge NW of Wilbur Hot Springs about 2 air miles. Comment
  UC1094315  Cordylanthus pringlei Rimo Bacigalupi with G. T. Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa 1/2 mi above Fir-root Spring Public Camp (7 mi s of Snow Mountain; at summit of ridge forming Colusa-Lake County line on Colusa County side, e of head of Long Ridge) 1402 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
  UCD123114  Cordylanthus pringlei A. M. Shapiro 1994-8-16 s.n. Colusa Letts Valley Road, Canyon of Stony Creek. 1432 Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  JEPS75756  Cornus sericea subsp. sericea L. R. Heckard and R. Bacigalupi 1976-9-6 4438 Colusa at margin of Trout Creek at trail crossing Snow Mt. 1828 Comment
  JEPS75866  Cornus sericea subsp. sericea L. R. Heckard 1974-9-10 3882 Colusa along East Circle Trail Snow Mt. (along spur running s.e. from West Peak) 2011 Comment
  CHSC53932  Cotula coronopifolia Vernon H. Oswald 1991-4-21 4524 Colusa Two Mile Rd, 3.7 mi south of Maxwell Colusa Rd. Along road through rice fields. 27 Comment
  RSA730236  Cotula coronopifolia R. R. Halse 2007-3-23 7109 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  RSA0096943  Crassula connata R. R. Halse 2010-3-20 7827 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
  JEPS86621  Crepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6701 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain); Snow Mountain 1500 Comment
  CHSC29713  Cressa truxillensis K. R. Stern 1980-6-30 6649 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC79006  Cressa truxillensis J. Marr; C. Warren, H. West, N. Wight 1998-6-11 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek. 114 Comment
  UCD84428  Crocanthemum scoparium Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6043 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  UCD55457  Croton setiger Ellen Dean; Gordon Harrington 2006-10-6 3281 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
  SACT000805  Crypsis aculeata Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa Comment
  CHSC113136  Crypsis alopecuroides Lowell Ahart 2013-10-1 19075 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
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  CHSC113051  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC77404  Crypsis schoenoides Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC84961  Crypsis schoenoides Lowell Ahart 2003-10-23 10675 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
  CHSC94322  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
  RSA268077  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1972-6-6 5658 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
Read comments
Aug 18 2014
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UCD59814  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  SEINET4344589 Image available Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UCD145274  Crypsis schoenoides Barry Hammel 1976-8-5 427 Colusa east side of Highway 45 near Colusa Golf Club. 30 Comment
  CAS-BOT-BC190165  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa Butte Lodge Outing Club, three miles above Colusa. Near Butte Creek. Comment
  CAS-BOT-BC190166  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 miles south of Colusa. 15 Comment
  RSA126601  Crypsis vaginiflora H. S. Yates 1936-8-14 6136 Colusa 6 miles S. of Grimes 15 Comment
  RSA756393  Crypsis vaginiflora Barbara Ertter, Elizabeth Nesse, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UC1100190  Crypsis vaginiflora Herbert L. Mason 1945-7-11 12643 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UC1146681  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa junction of Bear Creek and Sulphur Creek (bridge over Bear Creek, near Sulphur Springs); North Coast Ranges Comment
  UCD56671  Cryptantha Jack Alderson 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  UCD56918  Cryptantha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3521 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  HSC45712  Cryptantha affinis Sheila Logan 1978-4-22 77 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD83720  Cryptantha clevelandii Joseph Schlottman; with PLB 102 class 2010-5-2 6 Colusa East slope of Walker Ridge. Eaton Springs area. Southern part of valley, near old road. 713 Comment
  SEINET4206983  Cryptantha clevelandii var. dissita D. W. McNeal 1982-5-2 2632 Colusa On a rd. bank above Hwy. #20 at the Lake-Colus Co. line.; 0 Comment
  OBI20714  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek cyn, N of Hwy 20 (near Wilbur Springs) Comment
  JEPS80196  Cryptantha flaccida L. R. Heckard and J. Hickman 1980-7-3 5350 Colusa ca 10 mi w Stonyford (just w of Summit Springs sw Snow Mt.); Snow Mt. 1548 Comment
  JEPS81272  Cryptantha flaccida L. R. Heckard and J. C. Hickman 1982-7-5 5882 Colusa s of (slope below area) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UC1613300  Cryptantha flaccida Charles M. Belshaw April 1937 2881 Colusa vicinity of Cook's Spring (Inner North Coast Ranges, Devil's Ridge); Inner North Coast Ranges, Devil's Ridge Comment
  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
  JEPS117094  Cryptantha hispidula Peter Warner 2010-5-16 159 Colusa Walker Ridge Rd., ~ 8.3 km N of jct. with Hwy 20, ~ 1 km N of jct. w/ Indian Valley Reservoir Rd. at road-cut, both sides and adjacent slopes Comment
  UCD63124  Cryptantha hispidula Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4954 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  CHSC146  Cryptantha intermedia V. Holt 1935-5-17 Colusa Stonyford. Comment
  UC1177887  Cryptantha intermedia Peter M. Ray 1950-4-16 1716 Colusa jct of North Fork and Big Stony Creek (on n side of canyon) 548 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
  UC857152  Cryptantha intermedia Alice Eastwood and John Thomas Howell 1938-5-16 5629 Colusa Lake-Colusa county line on road to Williams Comment
  UCD61451  Cryptantha intermedia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3895 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  SBBG29133  Cryptantha intermedia L. Constance 1939-5-14 2489 Colusa 0.5 mi E of Mill Crk Ranger Station 548 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
  UCD37192  Cryptantha intermedia Beecher Crampton 1958-5-19 4820 Colusa Colusa County, 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  SDSU20614  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-4-13 1520 Colusa Bear Valley, on north side of Bear Valley Road, 5.75 miles south of Brim Road junction, on shallow, barren, eroding slopes. 387 Comment
  CHSC79477  Cryptantha microstachys B. Castro; L. P. Janeway 2000-5-4 1142 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC1051698  Cryptantha milobakeri Helen K. Sharsmith 1953-6-19 4279 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  CAS-BOT-BC234978  Cryptantha muricata Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6058 Colusa Walker Ridge. Along Walker Ridge Rd, E side of road in turnout 981 Comment
  UC1731392  Cryptantha nemaclada Dean W. Taylor 1998-6-16 16661 Colusa Sulphur Creek canyon 0.5 mi below (e) Wilbur Springs (n-facing shale slide); North Coast Ranges, Walker Ridge and vicinity 381 Comment
  CAS-BOT-BC33124  Cryptantha nemaclada M. K. Curran 1884-1-1 s.n. Colusa unspecified Comment
  UC78651  Cryptantha nemaclada Katharine Curran 1884-1 Colusa Comment
  JEPS80390  Cryptantha simulans L. R. Heckard and J. Hickman 1981-6-22 5623 Colusa Dark Hollow trail Snow Mt. 1935 Comment
  SEINET8731274 Image available Cryptantha torreyana Helen K. Sharsmith 1953-1 4282 Colusa Near Trough Springs on Trough Springs Ridge; clearing in Sugar Pine-Douglas Fir forest, Mendocino National Forest. 975 Comment
  JEPS13746  Cupressus macnabiana Frank W. Gould 1939-4-8 631 Colusa 1.5 mi w of Colusa County line (on road to Lucerne) Comment
  RSA589940  Cupressus macnabiana Michael A. Vincent, Robert Rhode 1996-3-30 7307 Colusa Along Walker Ridge Road, 1.0 miles S of junction with Brim Road Comment
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CHSC44829  Cupressus sargentii David Isle 1978-5-16 Colusa Frenzel Creek Research Area, about 10 mi SW of Stonyford, on Goat Mountain Road. Comment
  CHSC62835  Cupressus sargentii Vernon H. Oswald; Lowell Ahart 1994-3-23 6010 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  UC1585395  Cupressus sargentii R. Raiche 1989-11-1 90339 Colusa W of Williams, NW of Wilbur Springs, Walker Ridge, Freshwate Branch of E Fork Sulphur Creek between Signal Rock and Oak Grove 730 Comment
  CHSC115439  Cuscuta K. R. Stern 1980-5-5 6632 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD67007  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2740 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  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
  SEINET810124  Cuscuta indecora Steven P. McLaughlin 1986-1 4213 Colusa Sacramento Valley, 3.5 miles E. of Arbuckle Comment
  UCD163659  Cuscuta indecora var. indecora Craig Thomsen 1998-6-10 1957 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  JEPS90814  Cuscuta salina Dean W. Taylor 1993-8-31 14072 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  JEPS15571  Cycladenia humilis var. humilis G. Thomas Robbins with L. R. Heckard 1956-7-25 3711 Colusa s. flank of Snow Mt. East (at lower edge of cirque between Snow Mt. West and Snow Mt. East, slope above Dark Hollow Creek (tributary of Middle Fork Stony Creek)) 1981 Comment
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  UCD60101  Cynodon dactylon Dorman Sumner 1958-5-27 s. n. Colusa 6.5 miles south of College City, Howard Johnson Ranch. Comment
  CHSC116060  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
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. Comment
  CAS-BOT-BC114730  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa Roadside hollow in shallow overflow from rice fields, 3 mi W of Williams. 30 Comment
  JEPS110388  Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  CDA38928  Cyperus difformis J. T. Howell 1944-7-18 19838 Colusa 3 miles west of Williams. Comment
  UC1100527  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13117 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  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
  POM313103  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UCD141054  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  UCD141052  Cyperus erythrorhizos P. B. Kennedy 30-31 May 1922 s.n. Colusa Exact location unknown. Comment
  RSA107118  Cyperus squarrosus G. Thomas Robbins, L. R. Heckard 1956-7-25 3701 Colusa Lake - Colusa county boundary. Pond in meadow at eastern base of ridge that forms a southeastern extension of Snow Mountain West, about 1/2 mile airline from its summit 1982 Comment
  UCD141160  Cyperus strigosus Malcolm A. Nobs; S. Galen Smith 1949-9-9 1871 Colusa 3 miles west of Williams. 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
  CAS-BOT-BC445506  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  CAS-BOT-BC445507  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  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
  CHSC106228  Danthonia californica var. californica B. Castro; L. P. Janeway 2001-6-3 1253 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  CDA16113  Datisca glomerata G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15240 Colusa North Coast Ranges; Leesville Rd. On E side of main ridge from Bear Valley. 213 Comment
  CHSC75705  Datisca glomerata Vernon H. Oswald; Lowell Ahart 1999-6-22 9787 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  UCD58171  Datisca glomerata Gordon Harrington 2007-5-31 61 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  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
  UCD126517  Datura ferox T. G. Willis 1925-9-24 Colusa Colusa. Comment
  UC26117  Datura stramonium J. Burtt Davy May, 1898 4301 Colusa near Princeton; near Princeton Comment
  CHSC94514  Datura wrightii Lowell Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1 1/2 miles (air) east of East Park Reservoir, about 4 1/2 miles (air) northeast of Lodoga. 545 Comment
  CHSC112274  Daucus pusillus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD63774  Daucus pusillus Craig D. Thomsen 2008-5-23 2754 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 420 Comment
  POM174571  Daucus pusillus Roxana S. Ferris 1926-4-23 6587 Colusa 2 miles from Stony Ford. Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  UCR254940  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodoga 370 Comment
  CAS-BOT-BC376273  Delphinium Greg de Nevers 1995-5-27 10732 Colusa Near Lodobo Comment
  JEPS80053  Delphinium antoninum L. R. Heckard and J. Hickman 1979-6-15 5053 Colusa ne slope West Peak ridge (cirque between peaks); Snow Mt. 1981 Comment
  JEPS80112  Delphinium antoninum L. R. Heckard with J. Hickman 1980-7-1 5271 Colusa cirque between West Peak and East Peak ((ca 10 mi w of Stonyford)); Snow Mt. 1950 Comment
  JEPS81344  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  CHSC89286  Delphinium hesperium subsp. pallescens G. F. Hrusa 1998-6-19 14606 Colusa Northern California. North Coast Ranges. Above Little Stony Creek. Goat Mtn. Rd. +- 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  HSC97314  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley Comment
  UC1777719  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley Comment
  UC726271  Delphinium hesperium subsp. pallescens A. A. Heller 1940-5-6 15574 Colusa roadside bank on State Hwy #20 about 3 mi e junction with Highway #16 (<later note places locality along road from Williams to Upper Lake...a spot 3 mi e of <junction> actually is n...) Comment
  UCD148525  Delphinium hesperium subsp. pallescens G. F. Hrusa; K. van Katwyk 1995-4-22 12137 Colusa on south side of Leesville Road approximately 3 miiles north of Highway 20. 290 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
  HSC87027  Delphinium hesperium subsp. pallescens Terry Hines, Ellen Purcell, N. Williams 1988-4-16 55 Colusa 4.2 mi. W on Goat Mtn. Rd., along Stony Creek 0.5 mi. W of Digger Pine Campground 450 Comment
  HSC41862  Delphinium nudicaule K. Irwin 1977-4-24 302 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD57722  Delphinium nudicaule Jordan Thompson; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. South side of Craig Creek on south side of unimproved road. 335 Comment
  HSC85787  Delphinium nudicaule Tim Tilgham, Rob Marheine, Bruce Delgado 10 Apr [year missing] Colusa N side of Bartlett Springs Rd. Comment
  CAS-BOT-BC8058  Delphinium nuttallianum Roxana S. Ferris 1917-4-14 550 Colusa Foothills, 7 mi. west of Arbuckle along Arbuckle-Rumsey Road Comment
  HSC24968  Delphinium patens M. Dole 1963-4-15 30 Colusa 6 mi. S of the junction of Hwys. 16 and 20 on Hwy. 16 Comment
  CAS-BOT-BC17044  Delphinium recurvatum Mrs. H. C. Cantelow 1936-4-11 1208 Colusa Bear Creek Canyon. Comment
  JEPS96767  Delphinium uliginosum Dean W. Taylor 1998-6-23 16712 Colusa Walker Ridge, stock pond at head Doyle Canyon (ca 1 mile SE of Baldy Mtn) 853 Comment
  UCD82510  Delphinium uliginosum Craig Thomsen; G. Harrington 2008-5-12 2868 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CHSC46049  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  HSC87806  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa About 200 yd W of road; on road along Bear Creek from State Hwy 20 N to Leesville, 3.6 mi N 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
  UCD57830  Delphinium variegatum Gordon Harrington 2007-4-17 37 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. 554 Comment
  UCR47948  Delphinium variegatum C. Pauls 1975-4-20 4 Colusa Bear Valley Rd., 8.7 mi north of State Hwy 20 Comment
  SEINET5718465 Image available Delphinium variegatum Robert A. Christison 1960-1 29 Colusa On State Hwy 16, ca. 3 miles from Yolo-Colusa county border. 183 Comment
  UCD14294  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa Colusa Co.; 9.8 miles north of Highway 20 on Bear Valley Road, 1/2 mile into field on the east side of the road; Comment
  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
  UCD96611  Delphinium variegatum Rolf Y. Berg 1963-3-17 s.n. Colusa State Highway 16 between Cache Creek Canyon and junction with State Highway 20. Comment
  CAS-BOT-BC16955  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-11 1210 Colusa Bear Creek Canyon Comment
  CHSC1465  Delphinium variegatum subsp. variegatum 1946-4-18 Colusa Cache Creek. Comment
  CHSC86016  Delphinium variegatum subsp. variegatum Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 137 Comment
  CHSC89827  Delphinium variegatum subsp. variegatum B. Castro; L. Janeway 2001-5-2 1244 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak woodland. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  UCD57456  Delphinium variegatum subsp. variegatum Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3640 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. 308 Comment
  UCD82458  Delphinium variegatum subsp. variegatum Craig Thomsen; G. Harrington 2009-5-12 2836 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD14329  Delphinium variegatum subsp. variegatum Kathi A. Zurakowski 1984-4-21 Colusa Colusa Co.; Bear Valley, 9.2 miles north of Wilbur Springs turnoff, on the east side of the road 381 Comment
  CHSC107946  Deschampsia danthonioides B. Castro; L. Janeway 2011-4-27 1867 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  HSC9599  Deschampsia danthonioides C. B. Wolf 1928-5-8 2127 Colusa 3 mi. S of Arbuckle Rd. on the Pacific Hwy. Comment
  JEPS75435  Deschampsia danthonioides W. L. Jepson 1934-5-3 16601 Colusa Stegeman sta. n. of Colusa Comment
  POM207094  Deschampsia danthonioides A. H. Heller 1902-5-1 5435 Colusa Near College City 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
  CHSC79752  Dicentra chrysantha L. P. Janeway; B. Castro 2000-5-1 6686 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 243 Comment
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  CAS-BOT-BC277739  Dichelostemma Mona Bourell 1997-3-29 5810 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  UC1093627  Dichelostemma capitatum Francia Chisaki and Gene B. Newcomb 1958-4-1 1098 Colusa 0.7 mi nw Highway 20 junction with road to Lodoga (on road to Lodoga) Comment
  CHSC81331  Dichelostemma capitatum subsp. capitatum J. Trizzino 2001-3-31 17 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  HSC31395  Dichelostemma capitatum subsp. capitatum Maralyn O'Meara, Gary S. Lester 1974-5-4 350 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC31688  Dichelostemma capitatum subsp. capitatum Bonnie Prange 1974-5-4 Colusa Near Clyde Mine 854 Comment
  UCR206370  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14366 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  HSC22054  Dichelostemma capitatum subsp. capitatum D. R. Junell 1965-4-18 23 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  UC1053449  Dichelostemma volubile Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3173 Colusa 7.7 mi w Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CDA39450  Dichelostemma volubile T. C. Fuller 1958-5-27 3665 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  UCD139273  Dichelostemma volubile Carl Pfeiffer 1978-5-6 23 Colusa Bear Valley, Walker Ridge, 0.1 mile south of Bartlett Springs Road. 670 Comment
  CAS-BOT-BC208995  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  RSA126969  Digitaria sanguinalis H. S. Yates 1936-8-14 6138 Colusa 3 miles S. of Grimes 15 Comment
  UC1100288  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway Comment
  UCD72475  Dipsacus fullonum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3809 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  RSA0018384  Dipsacus fullonum Joan Stewart 1998-6-18 755 Colusa Bear Valley Comment
  CAS-BOT-BC208649  Distichlis spicata Roxana S. Ferris 1926-4-22 6291 Colusa 3 miles west of 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
  CHSC84346  Distichlis spicata Lowell Ahart 2003-8-15 10508 Colusa Road (disked) that bordered a rice field, on the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  JEPS108780  Distichlis spicata Lowell Ahart 2006-9-26 13353 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UCD61442  Distichlis spicata Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3887 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
  UCD64213  Distichlis spicata var. stricta Beetle 1946-6-27 4685 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. Comment
  UCD64348  Distichlis spicata var. stricta K. Esau 1932-6-29 Colusa Sutter Basin, near Colusa. Comment
  UCD64465  Distichlis spicata var. stricta Beetle 1946-6-27 4686 Colusa Junction of Wilber Springs Rd. and State Hwy. 20. 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
  HSC83326  Dodecatheon hendersonii Harold Grams 1975-4-12 10 Colusa Hwy. 16, 12.4 mi. N of Rumsey Comment
  CHSC48008  Downingia elegans Vernon Oswald 1984-7-20 1616 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. 1280 Comment
  JEPS5035  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa College City Comment
  UC131880  Downingia insignis A. A. Heller 1902-5-19 Colusa Colusa Comment
  UC1609312  Downingia insignis Vernon H. Oswald and Lowell Ahart 1993-5-27 5428 Colusa ca 0.5 mi nw Sites (Sites-Lodoga Rd, Sacramento Valley); Sacramento Valley 121 Comment
  UCD55041  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa Three miles east of Maxwell. Comment
  JEPS33725  Downingia pulchella D. E. Breedlove 1963-5-30 5191 Colusa 5 mi w Leesville Comment
  LA204320  Draba cuneifolia A. L. Haines; William Stewart 1935-2-10 sn Colusa 2 mi. N of Miller's Landing Comment
  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-BC197058  Echinochloa crus-galli Milo S. Baker 1944-7-18 10871 Colusa A few mi. W. of Williams along Highway to Lake Co. Comment
  UC1100257  Echinochloa crus-galli Malcolm A. Nobs and S. Galen Smith 1949-9-9 1874 Colusa 3 mi w Williams; w of 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
  JEPS47814  Echinochloa crus-pavonis W. L. Jepson 1929-10-1 15345 Colusa Maxwell Comment
  CAS-BOT-BC197272  Echinochloa muricata var. microstachya Roxana Stinchfield 1916-7-11 472 Colusa Davis tule near Sycamore Slough Comment
  UCD61165  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena, site of UC temporary experimental rice station 1923 - 1928. Comment
  UC1100137  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-9-5 13118 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) 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
  UC1100141  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-8-6 12960 Colusa 4 mi. s. Colusa (Colusa-Marysville Hwy., w. side of Sacramento R.) Comment
  UCD137951  Echinodorus berteroi C. F. Dunshee 1922-1 3 Colusa Cortina. Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  UC1100742  Eleocharis macrostachya Herbert L. Mason, Verne Grant 1946-8-6 12965 B Colusa 4 mi S of Colusa (pond on Colusa - Marysville Highway, W side of Sacamento River) Comment
  POM313051  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles Comment
  POM198509  Eleocharis palustris Roxana Stinchfield 1916-7-11 453 Colusa Colusa - Williams Road at Trough Comment
  JEPS80393  Elymus L. R. Heckard and J. Hickman 1981-6-22 5626 Colusa below (s of) Dark Hollow Trail; Snow Mt. 1981 Comment
  UC2014254  Elymus elymoides Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6067 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. Comment
  UCD61526  Elymus elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 548 Comment
  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
  JEPS75758  Elymus glaucus subsp. glaucus L. R. Heckard and R. Bacigalupi 1976-9-6 4441 Colusa just e Fouts Camp; Snow Mtn. 1859 Comment
  UCD61453  Elymus multisetus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3899 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/2 mile SW of parking lot. North of Eula Canyon. 420 Comment
  UCD62448  Elymus multisetus D. Sanchez Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 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
  UC641658  Elymus trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 mi w Leesville (dry bed of rivulet) Comment
  UCD84516  Elymus trachycaulus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6067 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  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
  CHSC90779  Emmenanthe penduliflora var. penduliflora D. Isle 2002-4-18 183 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, N. of Fouts Springs. 548 Comment
  JEPS80822  Epilobium L. R. Heckard and J. C. Hickman 1981-7-31 5792 A Colusa e side of mt. Snow Mt., Dark Hollow Creek 1584 Comment
  UC1614404  Epilobium Charles M. Belshaw 1937-4-25 2828 Colusa Inner North Coast Range, Cooks Spring, Devils Ridge Devils Ridge; Inner North Coast Range, Cooks Spring, Devils Ridge Comment
  UCD105385  Epilobium brachycarpum P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  UCD66925  Epilobium campestre Craig D. Thomsen; G. Harrington 2008-7-6 2786 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  UCD81376  Epilobium canum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5403 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just west of the mouth of canyon (inside the canyon) that is located south of Brophy Canyon. 266 Comment
  JEPS75838  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-11 3954 Colusa along Summit Springs trail Snow Mt.; , Summit Springs trail 1737 Comment
  JEPS80785  Epilobium ciliatum subsp. ciliatum L. R. Heckard and J. C. Hickman 1981-7-30 5758 Colusa se side of mt. Snow Mt., Trout Creek 1600 Comment
  CHSC86819  Epilobium cleistogamum Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC79783  Epilobium foliosum L. P. Janeway; B. Castro 2000-5-4 6705 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UC980843  Epilobium hallianum Kenneth Bradshaw 1953-9-9 Colusa near Board Camp Ridge (w Colusa Co.); Mendocino National Forest, Summit Valley 1676 Comment
  CHSC70986  Epilobium minutum Vernon Oswald; Lowell Ahart 1998-5-7 9005 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  JEPS124235  Epilobium minutum Lowell Ahart 2015-4-1 19998 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  CDA38111  Epilobium minutum Vernon H. Oswald & Lowell Ahart 1998-5-7 9005 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  JEPS79752  Epilobium minutum L. R. Heckard and J. C. Hickman 1980-7-2 5302 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mtn. 1661 Comment
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Feb 26 2013
  UCD106510  Epilobium minutum Linda A. Bell 1975-4-27 79 Colusa Barlett Springs Road, 1.5 miles E of Bear Valley Road. 609 Comment
  JEPS74980  Epilobium nivium L. R. Heckard 1974-9-11 3948 Colusa rocky promontory overlooking Fouts Springs (se corner of mt.); Snow Mt. 1889 Comment
  JEPS74981  Epilobium nivium L. R. Heckard 1974-9-11 3953 Colusa along Summit Springs trail Snow Mt. 1737 Comment
  UCSB4278  Epilobium torreyi Keator, Glenn 1958-6-17 Colusa Not far from Bartlett Springs in the foothills 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
  CAS-BOT-BC58020  Equisetum Roxana S. Ferris 1926-4-21 6312 Colusa Near Sycamore. Comment
  CAS-BOT-BC58046  Equisetum Roxana Stinchfield 1916-7-11 430 Colusa Sycamore Slough Road. Comment
  CHSC94512  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724897  Equisetum telmateia var. braunii L. Ahart 2006-8-22 13211 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC84966  Eragrostis hypnoides Lowell Ahart 2003-10-23 10674 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
  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
  UC1212582  Eriastrum brandegeeae Francia Chisaki and Helen Sharsmith 1959-5-27 1332 Colusa at Mill Creek crossing on road out of Red Bridge Camp Inner North Coast Ranges Comment
  RSA671050  Ericameria linearifolia G. Fred Hrusa 1995-4-2 12107 Colusa On Walker Ridge Road approx. 3 miles N of Highway 20 950 Comment
  JEPS75830  Ericameria nauseosa var. speciosa L. R. Heckard 1974-9-11 3947 Colusa rocky promontory overlooking Fouts Springs, se corner of Snow Mt. Snow Mt., Fouts Springs 1889 Comment
  SEINET251843  Erigeron L. Shultz, J. Shultz 1986-9-20 10226 Colusa 10 miles west of Colusa on Highway 20 Comment
  UCD84637  Erigeron greenei G. Harrington 2009-7-21 86 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  CHSC91047  Erigeron petrophilus var. petrophilus D. Isle 2003-6-12 372 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Ridgetop, GPS 10S 524888E 4345370N. 1816 Comment
  CAS-BOT-BC216003  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony Creek 2.5 miles east of Bonnie View, Inner North Coast Ranges 518 Comment
  SEINET3245667  Eriodictyon californicum G. K. Helmkamp, E. A. Helmkamp 2009-1 14759 Colusa Inner North Coast Ranges: along CA-16, 1.8 miles north of the Yolo County Line (Glascock Mountain 7.5') 271 Comment
  UCR206378  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2009-5-20 14759 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC242576  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa Bear Creek Canyon n. of Highway 20 (near Wilbur Springs) Comment
  CHSC92835  Eriogonum dasyanthemum D. Isle 2000-6-7 1245 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  CHSC94726  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
  HSC94132  Eriogonum dasyanthemum G. Fred Hrusa 1998-10-28 14904 Colusa Along summit of Walker Ridge 900 Comment
  RSA216788  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Creek canyon N. of Highway 20 (near Wilbur Springs) Comment
  UC1392809  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa n, Bear Creek Canyon Highway 20 (near Wilbur Springs); Bear Creek Canyon Comment
  UC1736002  Eriogonum dasyanthemum Dean W. Taylor 1992-6-10 12693 Colusa Highway 162 Alder Springs Road, ca. 4 miles west from junction in Stony Creek valley 762 Comment
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Feb 23 2009
  UCD163236  Eriogonum dasyanthemum Craig D. Thomsen 2000-6-7 2362 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66684  Eriogonum dasyanthemum Craig D. Thomsen 2000-5-11 2311 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
  UCR44922  Eriogonum dasyanthemum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CAS-BOT-BC242577  Eriogonum dasyanthemum Ella D. Cantelow 1957-5-31 s.n. Colusa 4 mi. west of Leesville on grade above Bear Valley Comment
  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
  UCD70225  Eriogonum dasyanthemum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual grasslands growing on ultramafic soils. 370 Comment
  UCD99909  Eriogonum dasyanthemum Grady L. Webster 1977-5-15 7680 Colusa Along Bear Creek, ca. 2 mile W of Route 20 along Wilbur Springs Road. 365 Comment
  UCD67672  Eriogonum fasciculatum var. fasciculatum D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. Serpentine chaparral. 350 Comment
  UCSB1430  Eriogonum gracile Keator, Glenn 1958-6-16 Colusa just east of Colusa-Lake County line; on road from Lower Lake to Sacramento Valley Comment
  UC201699  Eriogonum hirtiflorum Volney Rattan June, 1884 Colusa above Stony Creek Comment
  CAS-BOT-BC270977  Eriogonum nervulosum Roger Raiche 1985-7-27 50667 Colusa W of Lodoga, Goat Mt. Rd. area, headwaters of Frenzel Creek 707 Comment
  CHSC32218  Eriogonum nervulosum James Jokerst 1980-9-6 1055 Colusa Near Snow Mountain (West). Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  JEPS56620  Eriogonum nudum var. pubiflorum W. L. Jepson 1934-7-28 16750 Colusa hills se Cortina Valley Comment
  RSA7561  Eriogonum prattenianum Carl B. Wolf 1933-9-25 5497 Colusa 2 mi. W of Grass Valley on rd. to Rough and Ready. West slope of Sierra Nevada. Comment
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Oct 30 2012
  JEPS80805  Eriogonum strictum var. greenei L. R. Heckard and J. C. Hickman 1981-7-30 5776 Colusa about 2.5 km on ridge running e from West Peak; Snow Mt. 2011 Comment
  CHSC32225  Eriogonum strictum var. greenei James Jokerst 1980-8-20 1099 Colusa North Coast Ranges. Near Solomon Peak. Comment
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Aug 20 2014
  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
  UC1221009  Eriogonum tripodum Beecher Crampton 1963-6-11 6850 Colusa ca. 2 mi s Lodoga Comment
  CHSC117782  Eriogonum tripodum David Isle; Terril Wolt 2016-6-16 2164 Colusa North Coast Range: 3/4 mi NE of Fouts Springs and 1/4 mi WNW of Davis Flat on greenish, rocky serpentine ridge. 549 Comment
  IRVC29686  Eriogonum umbellatum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5032 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  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
  UCD101410  Eriogonum umbellatum var. bahiiforme Beecher Crampton 1963-6-11 6850 Colusa 2 miles south Lodoga. Comment
  CHSC32219  Eriogonum umbellatum var. smallianum James Jokerst 1980-8-6 1054 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  UCD101578  Eriogonum wrightii var. subscaposum Arthur M. Shapiro 1988-8-24 s.n. Colusa at the base of Goat Mountain Road, 3.2 miles west of Lodoga. Comment
  CDA15503  Eriophyllum lanatum var. achilleoides G. F. Hrusa, WTD 1998-6-19 14640 Colusa North Coast Ranges; Trough Springs ridge, immed. above (overlooking settlement) Fouts Springs. Comment
  HSC66004  Eriophyllum lanatum var. achilleoides Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 39 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  POM174581  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6453 Colusa Stonyford. 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
  JEPS34737  Eriophyllum lanatum var. achilleoides W. L. Jepson 1938-6-9 18962 Colusa mountains between Indian Valley, Lake County, and Bear Valley, Colusa County (Complexion Canyon, hillslope); Complexion Canyon 579 Comment
  RSA302654  Eriophyllum lanatum var. achilleoides Jim Shevock 1971-4-8 939 Colusa Sites-Lodoga Road 427 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
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. Comment
  SEINET8526911  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  RSA730242  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  CAS-BOT-BC211071  Eryngium Roxana Stinchfield 1916-6-18 309 Colusa R.R. embankment near College City Comment
  UC1299245  Eryngium aristulatum var. aristulatum Freed W. Hoffman 1947-6-19 1662 Colusa Cooks Springs western Colusa Co., North Coast Ranges, Cooks Springs Comment
  UC21016  Eryngium aristulatum var. aristulatum J. Burtt Davy 1898-5-1 4300 Colusa near Willows Comment
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Sep 15 2014
  UCR198153  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch, just west of the Hwy 20/Hwy 16 intersection, c. 300 ft uphill to the west of the corral 326 Comment
  CHSC78579  Eryngium castrense J. Marr; C. Warren, H. West 1998-7-1 Colusa Vicinity of Sites, Logan Ridge and Antelope Valley. 91 Comment
  CAS-BOT-BC40752  Erysimum capitatum Roxana S. Ferris 1926-4-23 6409 Colusa In grade beyond Mountain House on the Williams-Stonyford Road. Comment
  UCD64435  Erysimum capitatum Craig D. Thomsen 2001-4-24 2474 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-BC40755  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. 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
  HSC71302  Erysimum capitatum var. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-12 4624 Colusa Along Stony Creek below Digger Pine Campground Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CHSC106250  Erythranthe microphylla B. Castro; L. P. Janeway 2001-6-3 1254 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  CHSC110048  Erythranthe microphylla Lowell Ahart 2013-5-1 18688 Colusa Inner North Coast Range. In a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC84196  Erythranthe microphylla Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  UCD57300  Eschscholzia caespitosa Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3671 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  UCD57627  Eschscholzia californica Michele Lanctot; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. 356 Comment
  UCD70236  Eschscholzia californica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CHSC70978  Euphorbia crenulata Vernon Oswald; Lowell Ahart 1998-5-7 8994 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. Roadside bank. 487 Comment
  UCD163848  Euphorbia crenulata Craig D. Thomsen 2000-5-30 2275 b Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD66704  Euphorbia crenulata Craig D. Thomsen 2001-4-12 2454 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC59969  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa In field on east side of Bear Valley Road, 10.6 miles (by road) north of junction with State Highway 20. Valley floor of Bear Valley. 381 Comment
  CHSC70979  Euphorbia spathulata Vernon Oswald; Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  CHSC79501  Euphorbia spathulata B. Castro; L. P. Janeway 2000-5-2 1110 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 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
  SEINET5586425  Euphorbia spathulata Richard R. Halse 2013-1 8760 Colusa Along State Hwy. 20 just eat of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53 558 Comment
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  UCD57412  Euphorbia spathulata Gordon Harrington; Diana Hickson 2007-4-7 14 Colusa BLM Payne Ranch. SW of intersection Hwy. 16 and Hwy. 20. 3/4 mile west of Roadkill Cafe. 499 Comment
  UCD82371  Euphorbia spathulata Robin McMaster 1973-4-15 344 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  UC71774  Euthamia occidentalis H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD81254  Euthamia occidentalis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5419 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 312 Comment
  UCD61475  Extriplex joaquinana Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3896 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile SW of parking lot. 399 Comment
  UCD63021  Extriplex joaquinana Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4673 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCD82479  Extriplex joaquinana Ellen Dean; Bob Schneider 2009-6-19 5779 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Ridges opposite Cowboy Camp parking area on W side of Bear Creek. 394 Comment
  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
  UC2016538  Festuca bromoides Richard Olmstead 1984-4-29 530 Colusa On slopes by Walker Ridge Road 2.4 mi N of Calif. 20. Road follows ridge that is Lake/Colusa Co. line. Comment
  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
  CHSC112210  Festuca microstachys var. pauciflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS81295  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5909 Colusa below Summit Springs; Snow Mt. 1524 Comment
  CAS-BOT-BC63012  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  CAS-BOT-BC63015  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  UCD66952  Frangula californica subsp. crassifolia Ellen Dean; Davis Botanical Society 2008-5-31 4996 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  UCD55463  Frangula californica subsp. tomentella Ellen Dean; Gordon Harrington 2006-10-6 3287 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  POM135670  Frankenia salina Roxana Stinchfield 1916-7-11 120 Colusa Colusa - Williams Road at 'Trough' 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
  UCD163233  Fraxinus dipetala Craig D. Thomsen 2000-4-12 2156 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
  JEPS95818  Fraxinus latifolia Vernon H. Oswald and L. Ahart 1999-6-22 9779 Colusa Lily Pond near Upper Letts Lake west of Stonyford: T17N R8W Sect. 24, ca. 4080 ft, mixed coniferous forest. Twig of a small tree growing in wet soil along the edge of the meadow at the Lily Pond. 1243 Comment
  UCD122067  Fraxinus latifolia E. L. Hyde 1932-10-1 s.n. Colusa Miller's Landing. 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
  JEPS74659  Fritillaria glauca James E. Eckenwalder 1974-6-2 359 Colusa on w flank of east peak of Snow Mountain Snow Mountain Comment
  JEPS61959  Fritillaria pluriflora W. L. Jepson 1932-5-8 16287 Colusa Stonyford, west Colusa County Stonyford 365 Comment
  UC1179069  Fritillaria pluriflora Herbert L. Mason 1947-3-30 13165 Colusa 0.5 mi e of Lake County Line (on Williams-Lower Lake Highway, western Colusa County); Williams-Lower Lake Highway Comment
  UCD139704  Fritillaria pluriflora Jim Nelson Date Unknown s.n. Colusa Wilbur Springs. Comment
  UCR261677  Fritillaria pluriflora Ann Howald 2003-3-25 2282 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2 miles southeast of Stonyford, near turnoff to boat launch 374 Comment
  UCSC010483  Fritillaria purdyi Dylan M. Neubauer, Tim Forsell 2016-3-31 599 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  HSC62768  Fritillaria purdyi M. Dean Griswold Jr. 1979-4-14 16 Colusa 1067 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
  HSC48146  Galium andrewsii Thomas W. Nelson, Jane P. Nelson 1978-4-30 3967 Colusa Along Hwy. 20, E of Colusa-Lake county line 549 Comment
  CHSC113047  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-10-1 19067 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
  UC71638  Galium aparine Miss Alice King 1905-1 Colusa College City Comment
  UCD66441  Galium aparine Craig D. Thomsen 2000-4-28 2189 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  OBI78460  Galium bolanderi Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1335 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  CDA15454  Galium murale T. Gantenbein 1999-4-16 PDR 1198688 Colusa Central Valley; north Arbuckle. 0 Comment
  CHSC86129  Galium parisiense Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  JEPS80877  Galium parisiense L. R. Heckard and J. C. Hickman 1980-7-3 5364 A Colusa slopes about Summit Springs (sw slope of mt); Snow Mt. 1554 Comment
  UCD82466  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2843 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UC1212112  Galium porrigens Francia Chisaki and Gene B. Newcomb 1958-6-19 1166 Colusa on John Smith Road (Goat Mt.-Stonyford Road) Comment
  UCD66527  Galium porrigens Craig D. Thomsen 2000-4-28 2228 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Comment
  UCD121911  Galium porrigens var. tenue Elaine J. Imada 1971-4-10 15 Colusa East side of ridge; Bear Valley, Walker Ridge. 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
  HSC71307  Garrya congdonii Thomas W. Nelson, Jane P. Nelson 1979-4-12 4619 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS11967  Garrya congdonii Rimo Bacigalupi with G. T. Robbins 1954-6-25 4623 Colusa on road from Indian Valley (Lake County) to Bear Valley (Colusa County) (0.5 mi e of summit (Lake - Colusa County line)) 548 Comment
  SBBG34146  Garrya congdonii R. D. Slayback 1959-3-20 2 Colusa near St Hwy 16, 6 mi NW of Rumsey Comment
  UCD121087  Garrya congdonii Frederic Hrusa 1989-2-7 5806 Colusa 2 miles off Stonyford-Lodoga Rd. up road to Cedar Mtn. Comment
  UCD121095  Garrya congdonii 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
  CAS-BOT-BC178549  Garrya flavescens A. Burgard; J. Goldsmith; J. Kalt 1996-3-30 17 Colusa Walker Ridge Rd. 4.1 mi. north of intersection with Indian Reservoir Rd. 57 mi. east of Hwy. 101 on Hwy. 20. 938 Comment
  CHSC90682  Garrya flavescens D. Isle 1996-3-12 1010 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Just west of Ruby King Mine. 426 Comment
  CHSC94472  Gastridium phleoides Lowell Ahart 2006-8-9 13171 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC79788  Gilia capitata G. F. Hrusa 1998-6-19 14611 Colusa Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10S, 05356N, 43478E. 485 Comment
  RSA537483  Gilia capitata Barbara Ertter 1989-7-1 8601 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek, ca 12 airmiles WSW of Stonyford 1500 Comment
  UC1613303  Gilia capitata Charles M. Belshaw April, 1937 2870 Colusa Inner North Coast Range. Vicinity of Cook's Spring, Devil's Ridge. Comment
  UC1585898  Gilia capitata subsp. abrotanifolia Barbara Ertter 1989-7-1 8601 Colusa road to Goat Mt. Lookout 2.2 mi s Rt M-10 (Bear Creek-Fouts Spring Rd) (ca 12 mi wsw of Stonyford, sw side of ridge, at head of creek); S. Fk. Stony Creek 1500 Comment
  CHSC87237  Gilia clivorum B. Castro; Beth Hendrickson 2003-3-24 1399 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 310 Comment
  RSA388848  Gilia tricolor Virginia King 1975-4-20 9 Colusa Bear Valley Road, 8.7 miles north of State Highway 20 412 Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  UC72069  Gilia tricolor subsp. tricolor Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley, near College City Comment
  CHSC79484  Githopsis specularioides B. Castro; L. P. Janeway 2000-5-4 1141 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 248 Comment
  UC71621  Githopsis specularioides Miss Alice King 1905-1 Colusa College City Comment
  SEINET10464558  Githopsis specularioides King 1905-1 King s.n. Colusa College City Comment
  UC1563931  Glinus lotoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 Comment
  JEPS75039  Glyceria elata L. R. Heckard 1972-7-10 3110 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Spring, Snow Mt.) 1828 Comment
  CHSC92602  Glyceria striata D. Isle 2005-7-14 1143 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In first perennial drainage west of junction 17N09 diagonal 17N10 about 40 yards above culvert crossing 17N09. Waypoint BDCMP 1: NAD27 10S 0523113E 4350662N. Comment
  UCD57442  Glycyrrhiza lepidota Gina Darin; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  RSA724833  Gnaphalium californicum L. Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  CAS-BOT-BC303889  Gnaphalium palustre Roxana Stinchfield 1916-6-17 289 Colusa At Tule Levee, near College City Comment
  CAS-BOT-BC303890  Gnaphalium palustre Roxana Stinchfield 1916-7-9 409 Colusa Phillips Ranch Comment
  CHSC50794  Grindelia camporum var. camporum Vernon Oswald 1990-7-30 4410 Colusa Maxwell-Colusa Rd just east of Two Mile Rd, ca. 2 mi east of Maxwell. Between road and irrigation ditch. 27 Comment
  CAS-BOT-BC305301  Grindelia hirsutula L. R. Abrams 1928-5-8 12585 Colusa 2 miles south of Arbuckle Comment
  CAS-BOT-BC305305  Grindelia hirsutula Roxana Stinchfield 1916-6-17 283 Colusa College City Comment
  UC71783  Grindelia hirsutula H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UC71784  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
  UCD146597  Grindelia hirsutula G. F. Hrusa 1998-6-19 14598 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1.2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCD82539  Grindelia hirsutula Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5692 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CHSC97316  Grindelia hirsutula var. davyi L. P. Janeway 2007-6-17 9059 Colusa Inner North Coast Ranges. Along Bear Valley Road and Bear Creek near Hwy 20. 325 Comment
  CHSC91036  Hackelia micrantha D. Isle 2003-6-25 378 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0524627E 4345811N. 1731 Comment
  JEPS120990  Hainardia cylindrica Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18638 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
  JEPS96685  Harmonia hallii Dean W. Taylor 1998-6-23 16703 Colusa Walker Ridge, along BLM access road 929 Comment
  UCD159338  Harmonia hallii D. S. Park; E. Dean 2010-6-5 122 Colusa Walker ridge, Cold Spring Mt. Abundant by road. 692 Comment
  JEPS80276  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa n slope West Peak; Snow Mt., West Peak 2042 Comment
  JEPS83144  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  CHSC117407  Helenium puberulum B. Castro; Tom Boullion 2009-6-26 1795 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  CAS-BOT-BC309382  Helenium puberulum Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  JEPS30444  Helianthus bolanderi Peter H. Raven and R. Snow 1959-9-11 14424 Colusa about 2 mi se Happy Camp 762 Comment
  UC194952  Helianthus bolanderi H. M. Hall 1916-8-16 10267 Colusa near Williams Comment
  UC924977  Helianthus bolanderi Annetta Carter 1951-8-26 3079 Colusa Southwest of Leesville (hills at the w side of Bear Valley); North Coast Ranges, Bear Valley 450 Comment
  UCD163650  Helianthus bolanderi Craig Thomsen 1998-6-10 1948 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  RSA126696  Helianthus bolanderi Peter H. Raven, Richard Snow 1959-9-11 14424 Colusa About 2 miles south-east of Happy Camp 762 Comment
  UCR201552  Heliotropium curassavicum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14261 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SD22371  Heliotropium curassavicum var. oculatum Richard Neil 1938-6-20 Colusa Grimes Comment
  JEPS80141  Hemizonella minima L. R. Heckard with J. Hickman 1980-7-2 5301 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake County border) 1661 Comment
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  SD133786  Hemizonia congesta subsp. clevelandii L. R. Heckard, J. C. Hickman 1980-9-15 5418 Colusa Slopes west of Summit Springs, Snow Mountain. 1555 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
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  UCD61448  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3893 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1500 ft NW of parking lot. 368 Comment
  UCD72483  Hemizonia congesta subsp. luzulifolia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3817 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  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
  UCR261650  Herniaria hirsuta var. cinerea Ann Howald 2003-4-24 2317 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
  CHSC112922  Hesperevax acaulis var. robustior B. Castro; L. Janeway, Robin Carter 2010-3-23 1801 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal, in disturbed, grazed annual grassland. 121 Comment
  UCD57051  Hesperevax sparsiflora var. sparsiflora Gordon Harrington; Diana Hickson 2007-4-7 0012 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  UCD81735  Hesperocyparis macnabiana Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5737 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
  UCSC010368  Hesperocyparis macnabiana Dylan M. Neubauer, Tim Forsell 2016-3-30 592 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  CAS-BOT-BC175982  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CHSC48598  Hesperolinon californicum Vernon Oswald 1986-5-12 2010 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. Common in a grassy opening on a serpentine slope. 487 Comment
  JEPS94735  Hesperolinon californicum Vernon H. Oswald and Lowell Ahart 1998-7-15 9269 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  UC1212449  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4252 Colusa 1 mi n origin of Wilbur Springs road (near Hwy 20); Inner North Coast Ranges, Bear Creek drainage 365 Comment
  UCD110497  Hesperolinon californicum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD66457  Hesperolinon californicum Craig D. Thomsen 2000-6-7 2362 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
  UCD81215  Hesperolinon californicum Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5552 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. Top of ridge to the E of Destanella Flat. 578 Comment
  HSC96809  Hesperolinon disjunctum L. Ahart 2006-6-11 12675 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS110118  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UC1212491  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4255 Colusa road between Fouts Springs and Stoneyford; Inner North Coast Ranges, Mendocino National Forest, Candy B 609 Comment
  UC1212498  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4033 Colusa on Bartlett Springs road 4.4 mi from Leesville (western margin of county); Inner North Coast Ranges 609 Comment
  UC1601227  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 a Colusa Cook Springs Inner North Coast Ranges 548 Comment
  UCD67057  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2752 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-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
  RSA151789  Hesperolinon disjunctum H. K. Sharsmith 1959-5-27 4696 Colusa Colusa County: foot of grade on lower Lake to Williams road, W side Bear Valley. 427 Comment
Read comments
Jan 23 2009
  RSA151803  Hesperolinon disjunctum H. K. Sharsmith 1951-7-13 4031 Colusa Fouts Springs, near Mill Creek at junction with road to Black Diamond Ridge, Mendocino National Forest. 457 Comment
  UC1212301  Hesperolinon drymarioides Helen K. Sharsmith 1953-7-1 4407 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UC1212303  Hesperolinon drymarioides Helen K. Sharsmith 1959-5-27 4694 Colusa serpentine hillside above Cook Springs; Inner North Coast Ranges 548 Comment
  UC1212306  Hesperolinon drymarioides Freed W. Hoffman 1947-6-19 1616 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UCD110523  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs. 548 Comment
  SBBG83904  Hesperolinon micranthum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd 670 Comment
  UCD66692  Hesperolinon micranthum Craig D. Thomsen 2000-6-23 2373 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  SEINET10460718  Heterocodon rariflorum Lawrence R. Heckard Heckard 2235 Colusa 6 MI W OF STONYFORD 1700 Comment
  UC2042506  Heteromeles arbutifolia Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 6.1 miles N from its intersection with Hwy 20 Comment
  JEPS81347  Heuchera micrantha var. pacifica L. R. Heckard and J. C. Hickman 1982-7-7 5958 Colusa nw side Snow Mt (Crooked Tree Ridge) 1935 Comment
  RSA63370  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  CHSC32210  Hieracium greenei James Jokerst 1980-8-7 1061 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS73513  Hieracium greenei L. R. Heckard 1972-7-10 3131 Colusa overlooking and 3 mi w of Fouts Springs (woods near promontory on se corner of mountain); Snow Mt. 1828 Comment
  UCD133113  Hieracium greenei G. L. Stebbins Jr. 1964-7-4 6171 Colusa northeast side of Mt. St. John, west of Stonyford. 1524 Comment
  CDA20339  Holocarpha virgata D. Brown 2001-10-17 PDR 024366 Colusa Northern California; Vicinity of Colusa 0 Comment
  JEPS120708  Holocarpha virgata subsp. virgata Lowell Ahart 2013-10-1 19099 Colusa South end of the parking area, near strand of East Park Reservoir, about 2 air miles SE of Stonyford, about 3 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC1563895  Holocarpha virgata subsp. virgata Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8875 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  LA207941  Holodiscus discolor A. A. Heller; 1916-6-6 12362 Colusa Coast Range on the grade about 3 mi. W. of Leesville Comment
  UC1745700  Hordeum brachyantherum subsp. brachyantherum Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1391 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  CAS-BOT-BC284931  Hordeum brachyantherum subsp. californicum Roxana S. Ferris 1926-4-22 6300 Colusa 2 miles west of Colusa Comment
  JEPS475  Hordeum brachyantherum subsp. californicum W. L. Jepson 1938-6-9 18956 Colusa w slope of mountains between Indian Valley, Lake County and Bear Valley, Colusa County; Indian Valley, Bear Valley 579 Comment
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  SD225718  Hordeum depressum Carol Witham, Jennifer Buck 2001-4-30 161 Colusa 2 mi. south of the town of Colusa along Hwy 20, east east of Hwy 20 and the Colusa Airpo9rt, Dolan Ranch site, pool # DOL001 Comment
  UCD85754  Hordeum jubatum Freed W. Hoffman 1942-4-23 2254 Colusa Near Maxwell. Comment
  SEINET9320843  Hordeum jubatum Unknown 1998-7-9 Colusa Bear Valley 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
  SEINET3271561 Image available Hordeum murinum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14371 Colusa Inner North Coast Range Foothills; along CA-20, 14.3 miles southwest of Williams 375 Comment
  SEINET241543 Image available Hordeum murinum subsp. glaucum Richard R. Halse 2001-3-22 5946 Colusa Williams 18 Comment
  JEPS80220  Hordeum murinum subsp. leporinum L. R. Heckard and J. Hickman 1980-7-3 5376 Colusa w Summit Springs (sw slope Snow Mountain); sw slope Snow Mountain 1554 Comment
  CHSC48848  Horkelia californica subsp. dissita Vernon Oswald 1984-7-20 1614 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. On the edge of a meadow. 1280 Comment
  JEPS93802  Horkelia californica var. elata Vernon H. Oswald and Lowell Ahart 1998-7-15 9270 Colusa Bartlett Springs Road 1.6 mi west of Bear Valley Road 487 Comment
  UC1051739  Hydrophyllum occidentale Helen K. Sharsmith 1953-6-20 4295 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 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
  SEINET11259792 Image available Hypochaeris glabra R. R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  SEINET255491  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  UCD57109  Hypochaeris glabra Gordon Harrington; Diana Hickson 2007-4-7 0022 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/5 to 1/2 mile W of Roadkill Cafe on old fuel break. 442 Comment
  SEINET3875317  Iris macrosiphon Thomas E. Higley 1974-5-4 066 Colusa 3/4 miles north of T junction of Indian Valley.; 0 853 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
  UCD82635  Juglans hindsii Jack Alderson 2009-9-19 31 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Along Bear Creek, SE of mouth of Craig Canyon. 304 Comment
  CHSC62909  Juncus balticus Vernon H. Oswald 1994-4-11 6104 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, at the SW corner of Tract 39. 25 Comment
  CHSC107947  Juncus balticus subsp. ater B. Castro; Amy Lyons 2011-2-9 1830 A Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 400 ft northeast of Tehama-Colusa Canal. Large +- saline/alkaline wetland/ seasonal marsh. Western of the two Juncus patches at the south edge of the marsh. 49 Comment
  UCD61468  Juncus balticus subsp. ater Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3914 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/2 mile south of parking lot, along Bear Creek. 312 Comment
  CHSC107974  Juncus bufonius var. bufonius B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1859 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  JEPS91291  Juncus bufonius var. occidentalis Dean W. Taylor 1988-3-24 9463 B Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles North of Ware Road 24 Comment
  JEPS80270  Juncus ensifolius L. R. Heckard and J. Hickman 1980-9-16 5453 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  RSA724953  Juncus ensifolius L. Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  JEPS80271  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5454 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  JEPS80257  Juncus occidentalis L. R. Heckard, and J. Hickman 1980-9-15 5435 Colusa n of Summit Springs (n side of road); Snow Mt. 1524 Comment
  CHSC118858  Juncus phaeocephalus var. paniculatus David Isle; Frank Pendell 2017-5-17 2174 Colusa Footheills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank andsheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile 381 Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  UCD133669  Juniperus californica L. Ahart 1971-6-10 79 Colusa Near Sites. 76 Comment
  HSC97013  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa S side of Stony Creek, at Mine Camp, about 3.5 mi. W of Stonyford. 422 Comment
  CHSC76798  Lactuca saligna Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  UC33049  Lactuca serriola J. Burtt Davy 1898-5-1 4275 Colusa near Willows Comment
  RSA0011766  Lagophylla dichotoma Ethel Crum 1938-5-8 2033 Colusa Inner North Coast Range, 3 miles N of Leesville. Comment
  CAS-BOT-BC341394  Lagophylla minor Katherine Curran 1883-5-1 s.n. Colusa Wilbur Springs Comment
  CHSC112312  Lagophylla minor Lowell Ahart 2013-5-1 18680 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  UCD163715  Lagophylla minor Craig Thomsen 1999-5-10 2027 Colusa Colusa County. BLM Bear Creek Ranch. Near intersection of Hwy 16 and Hwy 20. About 0.5 miles south of Hwy 20. Comment
  UCD82519  Lagophylla minor Craig Thomsen; G. Harrington 2009-5-12 2876 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  RSA0011767  Lagophylla minor A. A. Heller 1940-5-6 15578 Colusa On State Hwy 20, 2 miles W of the junction with Hwy 16. Comment
  UCSB6616  Lagophylla minor Keator, Glenn 1958-6-17 Colusa Near roads at Houghs Springs, in hill country Comment
Read comments
May 24 2013
  CAS-BOT-BC341470  Lagophylla ramosissima L. R. Abrams 1928-5-8 12586 Colusa 2 miles south of Arbuckle 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
  SEINET5712842  Lasthenia californica Shirley C. Tucker 1988-1 28777 Colusa "Goldfields", junction of State Rds. 16 and 20 on Cache Creek.; Cache Creek Comment
  CAS-BOT-BC353480  Lasthenia fremontii A. A. Heller 1921-4-10 13546 Colusa Near Colusa Comment
  CHSC107951  Lasthenia fremontii B. Castro; T. Boullion 2011-4-20 1835 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
  UCD18839  Lasthenia fremontii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 146 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  HSC94246  Lasthenia glaberrima D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 5 Colusa On Bear Valley Rd., 1.2 mi. S of the junction with Brim Rd. 415 Comment
  JEPS118673  Lasthenia glaberrima B. Castro and L. P. Janeway 2011-4-27 1862 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UCR47942  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi north of jct with State Hwy 20 396 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
  HSC90077  Lasthenia glabrata C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 45 Colusa 100 m off Bear Valley Rd., 1.2 mi. S of junction with Walker Ridge Rd. 409 Comment
  POM163441  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1926-4-22 6288 Colusa 3 miles W of Colusa. 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
  JEPS35399  Lasthenia glabrata subsp. glabrata W. L. Jepson 1932-5-8 16283 Colusa Stonyford 365 Comment
  UC1049545  Lasthenia glabrata subsp. glabrata Rimo Bacigalupi 1950-4-16 3124 Colusa Bear Valley Comment
  UC638651  Lasthenia glabrata subsp. glabrata Ethel Crum 1938-5-8 2034 Colusa 4 mi s Leesville 426 Comment
  CAS-BOT-BC353439  Lasthenia glabrata subsp. glabrata Ella Dales Cantelow 1936-4-11 1151 Colusa Jct. William Hy, Bear Creek Canyon Comment
  UC71630  Lasthenia gracilis Miss Alice King 1905-1-1 Colusa College City Comment
  UCD132538  Lasthenia gracilis Beecher Crampton 1958-4-21 9169 Colusa 3.5 miles N.W. of Lodoga by road. Comment
  UCD66913  Lasthenia gracilis Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. Center of basin. 487 Comment
  UCD82127  Lathyrus jepsonii var. californicus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5656 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
  UCSB3094  Lathyrus nevadensis Keator, Glenn 1958-6-18 Colusa Near Bartlett Springs Comment
  HSC95805  Lathyrus vestitus subsp. vestitus A. Skelly, B. Bletcher, G. McCabe 1996-3-30 10 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  CAS-BOT-BC323885  Layia chrysanthemoides Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 44 Colusa Along Bear Valley Rd. 1.2 miles S of the junction with Brim Rd. 414 Comment
  CAS-BOT-BC323886  Layia chrysanthemoides Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-4-1 010 Colusa On Bear Valley Road, 1.2 miles S of junction with Brim Road. 414 Comment
  HSC86895  Layia chrysanthemoides Anthony J. Desch, Bryon Cariss 1988-4-17 39 Colusa 1.3 mi. S on Bear Valley Rd. from the corner of Brim Rd. and Bear Valley Rd. Comment
  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
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  UCD162975  Layia chrysanthemoides Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  UCD163672  Layia chrysanthemoides Craig Thomsen 1999-4-15 1973 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC72179  Layia chrysanthemoides J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9528 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  UC89185  Layia gaillardioides Katharine Brandegee Apr 1889 Colusa Leesville Comment
  CHSC110419  Layia platyglossa David Isle; Rhonda Isle; Hank Switzer 2011-4-14 1950 Colusa North Coast Ranges. Bear Valley on S edge of Bear Valley R. MDBM. Comment
  CHSC27623  Layia platyglossa Timothy Spira; Robert Schlising 1978-5-13 3249 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (= Wilber Springs) Road. Field. Comment
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May 24 2013
  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
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May 24 2013
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  JEPS119407  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa. Comment
  JEPS119416  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14358 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa Comment
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC329325  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa Grade on Rumsey--Arbuckle Road (both sides of summit) Comment
  UCR261645  Layia septentrionalis Ann Howald 2003-3-26 2289 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 407 Comment
  CHSC116664  Lemna trisulca Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20722 Colusa Small pond 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
  SEINET8201321 Image available Lemna trisulca J. M. Tucker, L. K. Mann, John Tothill 1959-1 3532 Colusa Mill Valley Comment
  UCD138208  Lemna trisulca J. M. Tucker; L. K. Mann, John Tothill 1959-5-30 3532 Colusa on small lake in Mill Valley, around 1/4 mile northwest of Lower Letts Valley, and around 4 miles, airline, north of Goat Mountain Lookout. 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
  UCD67066  Lepechinia calycina Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat. 554 Comment
  CHSC107952  Lepidium dictyotum var. acutidens B. Castro; T. Boullion 2011-4-20 1834 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 vernally moist flats, vernal pools and large bald patch of bare whitish soil. 49 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
  CHSC106232  Lepidium latifolium B. Castro; L. P. Janeway 2001-6-3 1255 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. Small strip of this species along old roadbed at head of the springs. 883 Comment
  CDA24916  Lepidium latipes D. Brown 1977-5-5 Colusa Terhel Farms Inc., Williams. 0 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
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  UC1100306  Leptochloa fascicularis Herbert L. Mason 1945-9-19 12720 A Colusa e bank of river 1 mi n Colusa (below causeway); Sacramento River Comment
  CHSC61255  Leptochloa fusca subsp. fascicularis K. R. Stern 1980-6-30 6648 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD63674  Leptochloa fusca subsp. fascicularis Hursh 1919-11-12 X 3341 Colusa Williams. Comment
  CAS-BOT-BC273930  Leptochloa fusca subsp. fascicularis Milo S. Baker 1944-7-18 10868 Colusa Several miles W. of Williams along Highway to Lake Co. Comment
  JEPS15570  Leptodactylon pungens G. Thomas Robbins with L. R. Heckard 1956-7-25 3710 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, s flank of Snow Mt. East, at lower edge of cirque between Snow Mt. Wsst and Snow Mt. East); Snow Mt. East, Dark Hollow Creek (trib. Middle Fork Stony Cr 1981 Comment
  RSA424704B  Leptosiphon bicolor Aaron Liston, M. A. Blumler 1987-4-26 667 -6 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD162985  Leptosiphon bicolor Craig D. Thomsen 2002-4-4 2584 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD67031  Leptosiphon bolanderi Ellen Dean; Davis Botanical Society 2008-5-31 5013 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD55171  Leptosiphon bolanderi Kim E. Steiner 1978-4-29 202 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  CHSC19699  Leptosiphon ciliatus L. A. Wright Jr. 1971-3-27 6 Colusa Ca. 7 mi s of Williams on Hwy 30, on the n side of the road. 91 Comment
  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
  HSC85857  Leptosiphon ciliatus Tim Tilghman, Rob Marheine, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  POM332470  Leptosiphon ciliatus Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 48 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. 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
  UCD118848  Leptosiphon latisectus Robert E. Preston 1995-3-26 724 Colusa mi west of Stonyford, 0.25 mile north of North Fork campground. Comment
  UCD118988  Leptosiphon parviflorus Robert E. Preston 1995-6-2 869 Colusa Walker Ridge. 1005 Comment
  UCR261672  Leptosiphon pygmaeus subsp. continentalis Ann Howald 2003-3-26 2294 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  UC1051736  Lesquerella occidentalis subsp. occidentalis Helen K. Sharsmith 1953-6-20 4291 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  UCD70252  Lessingia micradenia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UC1299302  Lessingia micradenia var. glabrata Freed W. Hoffman 1947-6-19 1658 Colusa Cooks Springs Comment
Read comments
Sep 27 2007
  UC1563853  Lessingia nemaclada Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8877 Colusa near end East Park Road from Stonyford (nw side of reservoir); East Park Reservoir 365 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
  JEPS85618  Lessingia ramulosa Rimo Bacigalupi with G. T. Robbins 1954-6-25 4621 Colusa 0.1 mi e Lake County line (e of summit of road from Bear Valley to Indian Valley) 640 Comment
  RSA0118883  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 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
  UCD66698  Lessingia ramulosa Craig D. Thomsen 2000-6-23 2400 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD134101  Lessingia ramulosa Vernon H. Oswald; Lowell Ahart 1998-7-15 9276 Colusa west side of county on Sawtelle Valley Road 0.4 mile north of Bartlett Springs Road. 670 Comment
  UCD163658  Leymus triticoides Craig Thomsen 1998-6-10 1956 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  UCR118966  Limnanthes douglasii subsp. nivea Beecher Crampton 1975-4-21 9167 Colusa Inner North Coast Ranges, Mendocino National Forest, 1 mile west of Lodoga 396 Comment
  JEPS19577  Limnanthes douglasii subsp. rosea Ruth Johnson 1918-4-6 Colusa College City Sacramento Valley Comment
  UC1586056  Limosella acaulis Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8874 Colusa se end East Park Reservoir (n of Lodoga); se end of East Park Reservoir 365 Comment
  UCD143419  Linanthus Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  IRVC29626  Linanthus Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5023 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  SEINET12326983  Linanthus bicolor E. J. Baker 1984-1 16 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams 143 Comment
  UC971715  Linanthus bolanderi Herbert L. Mason 1941-4-5 12404 Colusa 3 mi s Stonyford Comment
  CDA11404  Linanthus ciliatus G. F. Hrusa, K. van Katwyk 1995-4-22 12125 Colusa Inner North Coast Ranges; Approx. 3 m. NW of Hwy 20 on Leesville Rd. 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
  UCD41198  Linanthus ciliatus James Salyards 1986-5-17 86 - Colusa Along Sites-Lodoga Rd., 8.2 mi. west of Sites. Comment
  UCD118534  Linanthus dichotomus Beecher Crampton 1958-4-21 9172 Colusa 4 miles NW of Lodoga (by road). Comment
  UCD33940  Linanthus dichotomus Beecher Crampton 1958-4-21 9172 Colusa 4 miles NW of Lodoga (by road). Comment
  HSC89737  Linanthus dichotomus subsp. meridianus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 11 Colusa Goat Mtn. Rd., 0.2 mi. Lodoga/Stonyford Rd. jct. 152 Comment
  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
  UC618381  Linanthus parviflorus Alice Eastwood and John Thomas Howell 1938-5-16 5630 Colusa Lake-Colusa county line, on road to Williams 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
  JEPS86705  Linanthus rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6697 Colusa 0.5 km w Summit Springs (sw flank of mtn., Colusa-Lake County line); Snow Mtn. 1500 Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  UCD58099  Lithophragma affine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3476 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  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
  UCD81245  Lithophragma heterophyllum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5409 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  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
  UCD159333  Logfia filaginoides D. S. Park 2010-6-5 117 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  CAS-BOT-BC269050  Lolium perenne Roxana Stinchfield 1916-6-17 491 Colusa Road to Tule near College City Comment
  CHSC91217  Lomatium californicum D. Isle 2003-6-4 370 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 0.2 mi. W of M-10/M-5 jct. on N. edge of M-10. 621 Comment
  UCD163350  Lomatium dissectum Craig D. Thomsen 2000-5-12 2332 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  RSA396711  Lomatium hooveri Michelle Stevens 1979-4-14 15 Colusa Buck Flat on Walker Ridge Road 884 Comment
  SD70547  Lomatium hooveri Linclon Constance 1965-4-13 3756 Colusa Between Clear Lake, Oaks and Williams, Highway 20, 2.7 miles west of Highway 16 550 Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD58105  Lomatium hooveri Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3352 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 556 Comment
  UCD58110  Lomatium macrocarpum Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3370 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. South of Destanella. 548 Comment
  SEINET11587934  Lomatium utriculatum Unknown 2009-3-11 14374 Colusa Williams Comment
  UC874772  Lomatium utriculatum Lewis S. Rose 1936-4-27 36180 Colusa 11 mi. n.w. Rumsey Comment
  UCD64287  Lomatium utriculatum Craig D. Thomsen 2000-3-31 2119 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
  HSC47643  Lomatium utriculatum J. P. Smith, J. O. Sawyer 1978-4-29 9795 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UCD40909  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa 9 miles north of Hwy 20 on Bear Valley Road. About 100 yards into field on west roadside. Comment
  CHSC116047  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 miles northwest of Sites. 175 Comment
  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
  UCD66539  Lonicera interrupta Craig D. Thomsen 2001-5-24 2516 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC86839  Lotus corniculatus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  JEPS86626  Lotus denticulatus L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6706 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1500 Comment
  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
  CDA15501  Lotus grandiflorus G. F. Hrusa, Willie the Dog 1998-6-19 14638 Colusa North Coast Ranges; Below Fouts Springs on Fouts Springs Rd. to Stonyford. Immed. below Candy Bucket Spring crossing. Comment
  UC1423455  Lotus grandiflorus K. E. Bradshaw 1953-5 Colusa Lovelady Ridge Mendocino National Forest Comment
  JEPS101802  Lotus grandiflorus var. grandiflorus Dean W. Taylor 1998-6-23 16705 Colusa Walker Ridge; ; Walker Ridge, along BLM access road 929 Comment
  JEPS60204  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa about 6.5 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  JEPS83028  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2236 Colusa about 5 mi w Stonyford (along Trough Spring Ridge road 0.5 mi sw of its junction with the Stonyford-Fouts Spring road); Trough Spring Ridge 731 Comment
  HSC48166  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3930 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  UCR206894  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14363 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  POM163464  Lotus humistratus Roxana S. Ferris 1926-4-23 6417 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  UCR205138  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14242 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  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
  CHSC33400  Lupinus Rene T. Retuta 1978-4-4 8 Colusa Ca. 0.3 mi w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca 18 mi. sw of Williams. 579 Comment
  UCD66958  Lupinus adsurgens Ellen Dean; Davis Botanical Society 2008-5-31 5002 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1099 Comment
  UCD163846  Lupinus albifrons Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  JEPS95421  Lupinus albifrons var. collinus Vernon H. Oswald and L. Ahart 1994-3-23 6022 Colusa T17N R6W NW1/4 NW1/4 Sec. 31, 1610 ft, Chaparral. Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford 490 Comment
  UCD66966  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5010 Colusa west of I-5 at Maxwell, east slope of Goat Mountian, along Goat Mountain Road, between Cedar grove campground and the summit, near crossing of tributary of Little Stoney Creek. 1309 Comment
  UCD67041  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5021 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD83747  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 a Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  UCD83748  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 b Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  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
  NY15769  Lupinus albipilosus A. A. Heller 1940-4-21 15543 Colusa Border of a field along U. S. Highway #99W, 2 miles south of Williams, in the Lower Sonoran LIfe Zone. Comment
  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
  HSC44466  Lupinus bicolor R. York 1978-4-22 138 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC48044  Lupinus bicolor Thomas W. Nelson, Jane P. Nelson 1978-4-29 3938 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD83718  Lupinus bicolor Joseph Schlottman; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  UCR206724  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-17 14392 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  POM278280  Lupinus bicolor subsp. tridentatus Lyman D. Benson 1935-3-27 6329 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  RSA10439  Lupinus densiflorus var. aureus Carl B. Wolf 1928-5-8 2129 Colusa Sacramento Valley. 2 miles north of Dunnigans. Comment
  RSA155893  Lupinus densiflorus var. aureus Peter H. Raven 1962-5-31 17910 Colusa Highway 20, 2.5 miles east of Lake County Line Comment
  RSA424727  Lupinus densiflorus var. aureus Aaron Liston, M. Blumler 1987-4-26 617 -1 Colusa 15.7 miles south of Stonyford. Lessville - Lodoga Road. Comment
  HSC90950  Lupinus densiflorus var. densiflorus C. Elder, J. Reyes, S. Samuels 1993-4-17 70 Colusa Leesville Rd. 4.2 mi. E of jct. with Leesville-Lodoga Rd., 10 mi. jct. with Hwy. 20 488 Comment
  CAS-BOT-BC8380  Lupinus formosus subsp. formosus Amos Arthur Heller 1940-4-21 15543 Colusa US Hwy 99W, 2 miles S of Williams Comment
  RSA10440  Lupinus formosus var. robustus Carl B. Wolf 1928-5-8 2128 Colusa Sacramento Valley. 3 mi. south of Arbuckle Comment
  UC71650  Lupinus formosus var. robustus Miss Alice King 1905-1 Colusa College City Comment
  POM276455  Lupinus formosus var. robustus Lyman D. Benson 1933-4-16 4335 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  UC710400  Lupinus formosus var. robustus C. P. Smith 1946-4-26 46225 Colusa Hiway 99w about 2 mi w College City (Arbuckle - 1.5 mi s); Arbuckle Comment
  UCD107811  Lupinus grayi Tammy S. Smith 1985-4-13 10 Colusa ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18.0 mi sw of Williams. 321 Comment
  JEPS86629  Lupinus latifolius var. latifolius L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6696 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa lake Co.-Line); sw flank Snow Mountain 1500 Comment
  CHSC78515  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads. 411 Comment
  JEPS98385  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads 411 Comment
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  SD27803  Lupinus menziesii Carl B. Wolf 1928-5-7 2121 Colusa 17 miles east of [Houghs] Springs on the road to Williams 456 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
  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
  CHSC91566  Lupinus microcarpus var. densiflorus D. Isle 1995-4-28 402 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Lodoga Rd. just N of Leesville Rd. jct., 1/8 mi., at road edge. 304 Comment
  UCD57462  Lupinus microcarpus var. densiflorus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3642 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Mouth of Craig Canyon, along unimproved road. 316 Comment
  RSA659209  Lupinus microcarpus var. densiflorus R. Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd., 4.4 mi N Leesville. 457 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
  UCD166301  Lupinus microcarpus var. microcarpus Jack Major 1962-4-28 804 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 Comment
  UCD57053  Lupinus microcarpus var. microcarpus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3641 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UCD64426  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD66534  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-6-23 2421 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  HSC91380  Lupinus nanus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 19 Colusa 3 times SW of Digger Pine Campground on Goat Rd. 152 Comment
  HSC14931  Lupinus pachylobus D. R. Junell 1965-4-18 30 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  CHSC27819  Lupinus succulentus Laurie L. Pate 1978-4-8 87 Colusa 5.1 mi w of Walker Ridge Road, Hwy 20. 457 Comment
  CHSC90384  Lupinus succulentus Martin Polsan 1988-4-9 16 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  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
  SEINET12161340  Lupinus succulentus D. M. Burk 1978-1 87 Colusa 5.1miW of Walker Ridge Rd, Hwy 20. Wilbur Springs Quad 15'. S35 T14N R6W 457 Comment
  JEPS80283  Luzula cascadensis L. R. Heckard and J. Hickman 1980-9-16 5457 Colusa Northeast slope West Peak, cirque area between peaks, Snow Mt. 2011 Comment
  CAS-BOT-BC441312  Luzula subsessilis F. P. Cronemiller 1924-5-12 876 Colusa Lower Letts Valley 1249 Comment
  CHSC107980  Lythrum californicum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1883 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Ca 100 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CHSC86838  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  CHSC115003  Lythrum tribracteatum Lowell Ahart 2015-4-28 20113 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC86784  Lythrum tribracteatum Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. 103 Comment
  UC1619949  Lythrum tribracteatum Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 365 Comment
  UCD66865  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5068 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UC638653  Madia citriodora Ethel Crum 1938-5-8 2031 Colusa 3 mi n Leesville 426 Comment
  HSC5967  Madia citriodora D. R. Junell 1965-4-18 24 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 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
  CHSC88539  Madia exigua B. Castro 2003-5-15 1439 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On steep E-facing slope above dirt rd paralleling a S-trending canyon. 176 Comment
  RSA755624  Madia exigua George K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  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
  UCD66678  Madia exigua Craig D. Thomsen 2000-5-11 2302 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC89612  Madia gracilis B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1446 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 167 Comment
  UCR206383  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14753 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCD81259  Malacothamnus fremontii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5424 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD81897  Malacothamnus fremontii G. Harrington 2009-6-30 82 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. W side of Bear Creek on flat area above a steep bluff overlooking the creek. 233 Comment
  RSA32810  Malacothamnus helleri A. A. Heller 1940-6-7 s.n. Colusa Near foot of grade east of Lodogo, on Sites-Lodogo Road Comment
  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
  CHSC27868  Malacothrix floccifera Robin Ondricek 1978-4-8 5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  JEPS120980  Malacothrix floccifera Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18627 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  UCD132838  Malacothrix floccifera Beecher Crampton 1975-4-21 9164 Colusa 1.5 miles SE of Sites. Comment
  UCD63101  Malacothrix floccifera Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4932 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
  CHSC86831  Malvella leprosa Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Drainage. 103 Comment
  JEPS113503  Malvella leprosa Lowell Ahart 2007-7-7 14261 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  CDA32964  Malvella leprosa Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 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
  SEINET7254189 Image available Marah fabacea Richard. R. Halse 2014-1 9029 Colusa Along the Sites-Logoda Road ca. 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
  CDA36216  Marrubium vulgare G. K. Helmkamp, E. A. Helmkamp 2009-5-2 14757 Colusa Inner North Coast Ranges; Along CA-16, 1.8 miles north of the Yolo County line. Comment
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  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
  UC1051742  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes) 762 Comment
  SEINET3287499 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  POM276582  Medicago polymorpha Lyman D. Benson 1933-4-16 4337 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  POM276559  Medicago polymorpha var. brevispina Lyman D. Benson 1933-4-16 4336 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  RSA746964  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 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
  UCD107927  Medicago sativa Beecher Crampton 1963-8-5 6874 Colusa 3.5 miles south of Grimes. Comment
  CHSC100246  Melica californica D. Isle 1988-4-13 1507 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  HSC45732  Melica californica M. Alcasas 1978-4-22 34 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  UCD86456  Melica californica Beecher Crampton 1958-4-21 4728 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  CHSC100245  Melica harfordii D. Isle 1988-4-13 1508 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  CAS-BOT-BC247101  Melica torreyana Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD84546  Melica torreyana Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6144 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  UCD72468  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3802 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  JEPS120974  Melilotus indicus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18646 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
  RSA724950  Melilotus indicus L. Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CDA16093  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa North Coast Ranges; Little Stony Creek 457 Comment
  CHSC94453  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724894  Mentha spicata var. spicata L. Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 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
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  JEPS40618  Micropus californicus var. californicus W. L. Jepson 1932-5-8 16279 Colusa Lodoga Comment
  JEPS40619  Micropus californicus var. californicus W. L. Jepson 1932-5-7 16257 Colusa Valley above Venado Comment
  UC71655  Micropus californicus var. californicus Miss Alice King 1905-4-7 Colusa College City 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
  UC92165  Microseris acuminata Katharine Brandegee April 1889 Colusa Leesville Comment
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Aug 28 2012
  UC75985  Microseris campestris Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CAS-BOT-BC348829  Microseris douglasii subsp. douglasii Lewis S. Rose 1936-4-27 36185 A Colusa 15 mi. NW. of Rumsey 304 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
  CHSC81250  Microseris sylvatica L. P. Janeway; B. Castro 2001-4-26 7028 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 286 Comment
  RSA424702B  Microsteris gracilis subsp. gracilis Aaron Liston, M. A. Blumler 1987-4-26 667 -14 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  JEPS73486  Mimulus L. R. Heckard 1972-7-9 3098 Colusa se slope East Peak; Snow Mt. 2072 Comment
  RSA535823  Mimulus douglasii David M. Thompson 1988-3-28 860 Colusa 2.0 mi W of Bear Valley Road along Bartlett Springs Road. 0.25 mi W of a road culvert for a small stream. 534 Comment
  JEPS110093  Mimulus floribundus Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724956  Mimulus floribundus L. Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD82134  Mimulus floribundus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5664 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  CDA41790  Mimulus guttatus L. Ahart 2003-7-14 10383 Colusa On the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. Comment
  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
  JEPS60202  Mimulus layneae L. R. Heckard 1969-5-29 2238 Colusa about 6 1/2 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  SEINET10756213  Mimulus moschatus Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 912 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from interesection with Forest Service route M10. T17N R8W S25. 1371 Comment
  HSC96797  Mimulus nudatus L. Ahart 2006-6-11 12663 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS74812  Mimulus nudatus L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4020 Colusa just sw of site Old Kowalski ranch (below upper dam road, sw of Leesville); Upper Indian Valley 396 Comment
  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
  UCD82576  Mimulus nudatus Craig Thomsen 2008-6-12 2766 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  NY90769  Mimulus rattanii V. Rattan 06 1882 s.n. Colusa Above Font's Spr. Coast Mts. North of San Francisco Bay. Comment
  UC1614402  Minuartia cismontana Charles M. Belshaw 1937-4-25 2833 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UC72586  Minuartia douglasii Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD57104  Minuartia douglasii Gordon Harrington; Diana Hickson 2007-4-7 0025 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, ca .5 mi. W of Roadkill Cafe, N. of Thompson Creek. 439 Comment
  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
  UCD82385  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-12 2827 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  HSC47702  Minuartia douglasii J. P. Smith, J. O. Sawyer 1978-4-29 9788 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  SFV8394  Minuartia douglasii I. Batat 1973-4-15 24 Colusa 1.4 miles west of Bear Valley Road on Bartlett Springs Road, about 14 miles northeast of Clear Lake. 412 Comment
  UCD15429  Minuartia douglasii Margit Sands 1985-4-13 33 Colusa in Bear Valley, 7.4 miles north of Wilbur Hot Springs rd., a quarter of a mile form the west side of the road; 396 Comment
  UCD82364  Minuartia douglasii Robin McMaster 1973-4-15 334 Colusa middle of Bear Valley. Comment
  JEPS15565  Minuartia nuttallii subsp. gregaria G. Thomas Robbins with L. R. Heckard 1956-7-25 3716 Colusa slope above Dark Hollow Creek (a tributary of Middle Fork Stony Creek) (on s flank of mt., at lower edge of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. East 1981 Comment
  JEPS81413  Minuartia nuttallii subsp. gregaria L. R. Heckard and J. C. Hickman 1982-7-9 6021 Colusa just e Lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  CHSC92630  Minuartia nuttallii var. gregaria D. Isle 1999-7-14 1287 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Approx. 1/3 mile below jct. 16N18/16N03 (1/4 mi. below Lake/Colusa Co. Line in Colusa Co. GPS: 10S 0522970 E 4347039 N; Spr 25' South. 1688 Comment
  JEPS73483  Monardella odoratissima subsp. glauca L. R. Heckard 1972-7-9 3094 Colusa On southeast slope East Peak; Snow Mt. 2072 Comment
  CHSC106248  Monardella villosa B. Castro; L. P. Janeway 2001-6-3 1261 Colusa Inner North Coast Ranges. 'Til Jones Spring' at headwaters of Freshwater Branch of E. Fork Sulphur Ck, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 Comment
  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
  JEPS75863  Monardella villosa subsp. villosa L. R. Heckard 1974-9-10 3885 Colusa along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  UC883639  Monardella villosa subsp. villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  JEPS35220  Monolopia major Ruth Johnson 1915-4-6 Colusa College City Comment
  JEPS35229  Monolopia major W. L. Jepson 1932-5-7 16254 Colusa valley above Venado 274 Comment
  UC629741  Monolopia major Ethel Crum 1938-5-8 2035 Colusa 4 mi s Leesville; Bear Valley 426 Comment
  SFV12204  Monolopia major J. M. Tucker 1968-5-4 4109 Colusa Bear Valley, middle of valley floor, 10 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 Comment
  CAS-BOT-BC83270  Myosurus minimus Roxana S. Ferris 1917-4-10 1441 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83277  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  UC1738123  Myosurus minimus D. E. Stone 1955-5-2 7 -13 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  UCD96586  Myosurus minimus H. L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  POM312445  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa 3 miles east of Maxwell Comment
  UC1146671  Nassella cernua Freed W. Hoffman 1944-7-13 1957 Colusa between Indian Valley and Bear Valley; North Coast Ranges Comment
  UCD72481  Nassella lepida Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3815 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  UCD82446  Nassella lepida Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5662 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UCD87673  Nassella pulchra D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCSB6643  Navarretia G. Keator 1958-6-17 S.N. Colusa JUST W OF BARTLETT SPRINGS Comment
  CHSC79543  Navarretia heterandra B. Castro; L. P. Janeway 2000-5-1 1104 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  JEPS80763  Navarretia intertexta L. R. Heckard and J. C. Hickman 1981-7-30 5730 Colusa 182 Comment
Read comments
May 28 2012
  JEPS105730  Navarretia jepsonii David Gowen 2004-5-18 81 Colusa About 1.5 miles southeast of Stonyford at East Park Resevoir. Northwestern end, .3 mile SW of the dam that drains to Little Sony Creek. Comment
  SEINET13711098  Navarretia jepsonii Lowell William Ahart, Lowell William Ahart 2003-1 10385 Colusa 21 Road Mi. SW of Williams, 2 Mi. SW Jct. Hwy 20 and Bear Valley Road (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  UC142967  Navarretia jepsonii Katharine Brandegee 1910-8-10 Colusa near Eppersons (sw Colusa County); Bear Valley Comment
  UC856832  Navarretia jepsonii A. A. Heller 1916-6-6 12356 Colusa about 3 mi w Leesville (on the grade); Coast Range Comment
  UC908621  Navarretia jepsonii Herbert L. Mason 1946-5-30 12814 Colusa about 1 mi e Lake County line (w Colusa County); Leesville Grade Comment
  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
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  UCD72392  Navarretia mellita Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5118 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UCD66933  Navarretia nigelliformis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5082 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. 428 Comment
  CDA40123  Navarretia nigelliformis D. Brown 1986-6-3 s.n. Colusa County road southwest of Williams. 0 Comment
  CHSC112918  Navarretia nigelliformis subsp. nigelliformis B. Castro; Robin Carter, Amy Lyons 2010-5-13 1807 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 121 Comment
  UC584174  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 mi w Williams (on Bartlett Springs road) 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
  UC1618098  Navarretia viscidula Donald G. Nelson 1940-6-9 Colusa Stoneyford Comment
  UC1585893  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); Stony Creek 1500 Comment
  UCD160063  Nemophila James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  JEPS95489  Nemophila heterophylla Vernon H. Oswald and L. Ahart 1994-4-6 6058 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
  UC595049  Nemophila heterophylla Annetta Carter 1938-5-8 1384 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC606895  Nemophila heterophylla L. Constance 1938-4-22 2146 Colusa Lower Lake-Williams Rd 4 mi e Lake-Colusa LIne (on Cache Creek near Wilbur Springs); Inner North Coast Ranges, Cache Creek nr Wilbur Springs 365 Comment
  JEPS1484  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  JEPS2989  Nemophila menziesii Alice King May, 1908 Colusa College City Comment
  CHSC70890  Nemophila menziesii var. menziesii Vernon Oswald; Lowell Ahart 1998-4-21 8949 Colusa Rd. 401 1.8 mi north of Grapevine Pass on the Sites-Lodoga Rd. 472 Comment
  JEPS81302  Nemophila parviflora L. R. Heckard and J. C. Hickman 1982-7-5 5916 Colusa grassy slope below Summit Springs (s side Snow Mt.); , below Summit Springs 1524 Comment
  UCD163210  Nemophila pedunculata Craig D. Thomsen 2000-3-31 2103 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  JEPS87759  Nicotiana glauca Vernon H. Oswald and Lowell Ahart 1994-3-23 6024 Colusa 1.8 mi w Stonyford-Lodoga Rd. (Goat Mtn Rd, s of Stonyford, between the road and Little Stony Creek) 487 Comment
  RSA730238  Nicotiana glauca Richard R. Halse 2007-3-25 7123 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. (WGS84) 100 Comment
  UC34994  Nicotiana quadrivalvis J. Burtt Davy May 1898 4304 Colusa near Princetown Comment
  CAS-BOT-BC227679  Oemleria cerasiformis Craig Thomsen 2008-6-12 2762 Colusa Walker Ridge, vicinity of Elgin Mine. Lucientes Property 655 Comment
  UC1229784  Orobanche bulbosa G. Newcomb, F. Chisaki 1958-6-23 1165 Colusa North Coast Range, on John Smith Road John Smith Road; North Coast Range, John Smith Road Comment
  UC71766 Image available Orobanche californica subsp. jepsonii H. P. Chandler Oct 1905 Colusa Princeton. Comment
  SEINET5766934  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton Comment
  SEINET8854072 Image available Orobanche grayana var. jepsonii H. P. Chandler 1905-1 s.n. Colusa Princeton Comment
  JEPS81407  Orobanche pinorum L. R. Heckard and J. C. Hickman 1982-7-9 6014 Colusa Colusa-Lake County Boundary: Near junction of Horse Glade along road to Lookout, Goat Mt. Comment
  CAS-BOT-BC502948  Orobanche vallicola Roxana Stinchfield 1916-7-12 475 Colusa Sycamore Slough Comment
  POM286327  Orthocarpus erianthus Lyman D. Benson 1935-3-27 6339 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  RSA516500  Orthocarpus lithospermoides var. bicolor W. L. Jepson 1938-6-9 18964 Colusa Mts. between Indian Valley and Bear Valley. Btw. Lake Co. and Colusa Co. Comment
  RSA424698B  Orthocarpus purpurascens Aaron Liston, M. Blumler 1987-4-26 667 -8 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD34848  Oryza sativa Beecher Crampton 1963-9-9 6894 Colusa 1/4 mile E of Cortena. Comment
  JEPS80775  Osmorhiza berteroi L. R. Heckard and J. C. Hickman 1981-7-30 5748 Colusa Trout Creek trail Snow Mt. (se slope of mt.) 1645 Comment
  SEINET519285  Osmorhiza berteroi L. P. Janeway 1998-3-7 5710 Colusa Along Pacific Ridge Rd. (16N06) 0.5 mi E of road to Spanish Ridge and Hough Springs. 1052 Comment
  CHSC75683  Packera clevelandii Vernon H. Oswald; Lowell Ahart 1999-6-22 9783 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 359 Comment
  CHSC108162  Packera eurycephala var. eurycephala David Isle 2011-5-8 1902 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. In W 5 Ac of indicated township/range/sec. etc. E of Isle home, concen. W of E fenceline 2253 Dennis Dr., Stonyford. 374 Comment
  UC1299444  Packera greenei Freed W. Hoffman 1947-6-19 1670 Colusa Cooks Springs, w Colusa County North Coast Ranges Comment
  UC1543129  Packera greenei Donald G. Nelson 1940-6-9 Colusa w of Stoneyford Road to Snow Mountain area (road to Bonnie View) Comment
  UCD159330  Packera greenei D. S. Park 2010-6-5 114 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD66540  Packera greenei Craig D. Thomsen 2001-5-24 2518 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82522  Packera greenei Craig Thomsen; G. Harrington 2009-5-12 2879 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  CAS-BOT-BC316930  Packera greenei Ella D. Cantelow 1957-5-31 s.n. Colusa 4 mi. west of Leesville on grade above Bear Valley Comment
  RSA724818  Panicum capillare L. 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
  UC1101588  Panicum capillare Herbert L. Mason 1945-9-19 12719 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink Comment
  UC1151667  Parapholis incurva Beecher Crampton 1958-5-19 4825 -A Colusa along US Hwy 99-W, 4 mi s Maxwell Comment
  UCD36222  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa Colusa County, 2 miles east of Maxwell. Comment
  UCD88609  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa 2 miles east of Maxwell. Comment
  UCR119180  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa Sacramento Valley, 2 miles east of Maxwell 91 Comment
  POM166124  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Stinchfield Ranch, along Sycamore Slough Comment
  CDA11257  Parnassia californica G. F. Hrusa 1994-11-7 11992 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. Frenzel Creek a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  CDA11258  Parnassia californica G. F. Hrusa 1994-11-7 11993 Colusa North Coast Biodiversity Arena; Banks of Little Stony Creek, approx. 2.5 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  UC1037264  Paspalum boscianum E. Wilson 1934-8-9 54 Colusa Biggs Comment
  CAS-BOT-BC259722  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Colusa - Williams Road at the trough Comment
  JEPS110214  Paspalum distichum Lowell Ahart 2006-9-26 13352 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UCD88913  Paspalum distichum C. F. Dunshee 1942-1 2 Colusa Rice fields. Comment
  UC1613496  Pectocarya penicillata Charles M. Belshaw 1937-4-25 2840 Colusa vicinity of Cook's Spring (Inner North Coast Ranges, Devil's Ridge); Inner North Coast Ranges, Devil's Ridge Comment
  UC766200  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  UC766994  Pectocarya pusilla R. F. Hoover 1938-4-23 3209 Colusa Upper Sand Creek 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
  UCD83683  Pedicularis densiflora John Rosenthal; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. East slope of Walker Ridge. Eaton Springs area. 716 Comment
  UC1051747  Pediomelum californicum Helen K. Sharsmith 1953-6-21 4304 Colusa ca 1 mi within boundary of Mendocino National Forest (slopes of Little Stoney Creek); Mendocino Nat For, Little Stoney Creek, Inner N Coast Ranges 670 Comment
  CHSC77906  Pellaea andromedifolia Beth Hendrickson; Jean Witzman, Mary Ann Griggs 1999-3-16 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 158 Comment
  CAS-BOT-BC77156  Pellaea mucronata subsp. mucronata Josh Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 39 Colusa Along Brim Rd. 1.6 miles west of the junction with Bear ValleyRd. (Robber's Flat) 487 Comment
  HSC47602  Penstemon azureus J. P. Smith, J. O. Sawyer 1978-4-29 9797 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UC1212587  Penstemon heterophyllus Francia Chisaki, Helen K. Sharsmith 1959-5-26 1330 Colusa on road to Red Bridge Camp at North Fork of Stony Creek crossing; Inner North Coast Ranges, North Fork Stony Creek Comment
  UCD38809  Penstemon heterophyllus Beecher Crampton 1958-5-19 4805 Colusa Colusa County, Ladoga. Comment
  UCSB6183  Penstemon heterophyllus Keator, Glenn 1958-6-17 Colusa Near Bartlett Springs Comment
  POM231385  Penstemon heterophyllus subsp. purdyi M. S. Baker 1937-5-17 8659 Colusa Hwy 20, soon after entering hills from Williams. Comment
  CHSC84198  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  UCD82488  Penstemon heterophyllus var. purdyi Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5674 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
  CHSC110836  Penstemon heterophyllus var. purdyi David Isle 1989-4-29 2004 Colusa Stony Creek Watershed. 0.9 mi SW of Stonyford Store; E side Lodoga-Stonyford Rd (Co Rd 306). 150' N of Jct w/Dennis Dr. 374 Comment
  NY601765  Penstemon heterophyllus var. purdyi A. A. Heller 1919-5-10 13118 Colusa Valley west of Leesville Comment
  UCD56673  Pentagramma triangularis Jack Alderson 2007-3-25 9 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  CHSC42651  Perideridia kelloggii Vernon Oswald 1986-6-30 2175 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  UCD127855  Perideridia kelloggii K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, on U.S. #20. Comment
  JEPS127597  Perideridia kelloggii David Isle with Frank Pendell 2014-6-16 2135 Colusa About 2 miles W of Stonyford on the Pendell Ranch. SE of the home of Frank and Sheri Pendell about 1/4 mile and NW of the Stonyford cemetery about 200 yards. Comment
  SEINET10545723  Perideridia kelloggii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 379 Colusa On Hwy. 20, 0.3 mi E of Lake County line. Comment
  JEPS73489  Perideridia oregana L. R. Heckard 1972-7-9 3101 Colusa East Peak Snow Mt. (scree slope on se slope) 2011 Comment
  CHSC84960  Persicaria amphibia Lowell Ahart 2003-10-23 10656 Colusa In 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
  CHSC94459  Persicaria punctata Lowell Ahart 2006-8-9 13133 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  HSC47736  Petrorhagia dubia Thomas W. Nelson, Jane P. Nelson 1978-4-29 3942 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS73516  Phacelia corymbosa L. R. Heckard 1972-7-10 3134 Colusa w Trout Creek; Snow Mt. 1828 Comment
  JEPS95504  Phacelia distans Vernon H. Oswald and L. Ahart 1994-3-23 6021 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  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
  UCD63026  Phacelia divaricata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4678 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 513 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
  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
  UC726917  Phacelia imbricata A. A. Heller 1942-5-29 16483 Colusa bank on State Hwy 20 3 mi w junction with State Highway #16 Comment
  CHSC79517  Phacelia imbricata subsp. imbricata B. Castro; L. P. Janeway 2000-5-2 1109 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  JEPS81284  Phacelia imbricata subsp. imbricata L. R. Heckard and J. C. Hickman 1982-7-5 5895 Colusa slope below (s) Summit Springs (s side of mt.); Snow Mt. 1500 Comment
  SEINET5520514  Phacelia imbricata subsp. imbricata R. R. Halse 2010-3-25 7850 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  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
  CHSC32213  Phacelia mutabilis James Jokerst 1980-8-6 1059 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
Read comments
Feb 2 2007
  CAS-BOT-BC134039  Phacelia tanacetifolia Roxana S. Ferris 1926-4-23 6407 Colusa on grade beyond the Mountain House of the Williams-Stonyford Road Comment
  HSC45748  Phacelia tanacetifolia Stephen Plant 1978-4-23 228 Colusa 2.5 mi. from Hwy. 20 on bear Valley Rd. 419 Comment
  UC765521  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  UCD82490  Phalaris aquatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5676 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
  UCR225399  Phalaris aquatica Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5100 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon, just south of junction with trail that leads east to Brophy Canyon and Thompson Creek 488 Comment
  UCD88339  Phalaris brachystachys Beecher Crampton 1961-7-20 5936 Colusa 8 miles SE of Grimes. Comment
  CAS-BOT-BC259027  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 Colusa 4 miles east of Williams 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
  UCD89177  Phalaris minor Hursh 1919-1 X 3340 Colusa Williams. Comment
  UC50462  Phalaris paradoxa J. Burtt Davy May, 1898 4264 Colusa near Princeton; near Princeton Comment
  CHSC57170  Phlox gracilis R. W. McNulty 1983-4-9 1 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi se of Williams. 321 Comment
  SEINET11587800  Phlox gracilis Unknown 2009-3-11 14370 Colusa Williams Comment
  UCR206810  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-17 14389 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  HSC103841  Phoradendron bolleanum G. Fred Hrusa, K. van Katwyk 1995-4-22 12109 Colusa North end of Walker Ridge, ~1 mi. south of intersection with Bartlett Springs Rd. Parasite on Cupressus macnabiana 1000 Comment
  JEPS21852  Phoradendron densum John R. Swanson 1958-4-26 323 Colusa 2.8 mi. w. Bear Valley rd. (near Colusa-Lake Co. boundary, on rd. to Bartlett Springs) 670 Comment
  JEPS80199  Phoradendron libocedri L. R. Heckard and J. Hickman 1980-7-3 5354 Colusa n. side of rd. across from Summit Springs (Snow Mt., Colusa-Lake Co. boundary); Snow Mt. Comment
  RSA0115434  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian. 20 Comment
  CAS-BOT-BC141237  Phoradendron serotinum subsp. tomentosum Roxana S. Ferris 1926-4-21 3274 Colusa Sycamore Slough 2 miles W of Sycamore 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
  RSA140862  Physalis lancifolia John H. Thomas 1960-8-30 8866 Colusa About 5 miles northwest of College City along road to Sycamore. 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
  CAS-BOT-BC76959  Pilularia americana G. Thomas Robbins; S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  UCD83751  Pinus attenuata Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5948 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  CDA580  Pinus sabiniana G. D. Barbe, T. C. Fuller 1986-3-6 4259 Colusa Steep bank below road grade, Leesville Grade, W of Williams. 0 Comment
  CHSC94297  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110173  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCD72389  Piptatherum miliaceum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5115 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UCD84557  Piptatherum miliaceum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CAS-BOT-BC227984  Plagiobothrys Doris K. Kildale 1928-5-8 5016 Colusa 3 miles S of Arbucle [Arbuckle] Comment
  POM163443  Plagiobothrys Roxana S. Ferris 1926-4-21 6295 Colusa 3 mi W of Colusa.. Comment
  CHSC29710  Plagiobothrys bracteatus K. R. Stern 1980-6-1 6636 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC81227  Plagiobothrys bracteatus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD57876  Plagiobothrys bracteatus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 53 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC79098  Plagiobothrys canescens B. Castro; C. Warren 2000-4-3 1046 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 173 Comment
  UCR206386  Plagiobothrys canescens George K. Helmkamp, E. A. Helmkamp 2009-5-20 14750 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  UCR261659  Plagiobothrys distantiflorus Ann Howald 2003-3-25 2286 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2.1 miles southeast of Stonyford, near diversion canal inflow to reservoir 369 Comment
  UCR261674  Plagiobothrys distantiflorus Ann Howald 2003-3-12 2281 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2.1 miles southeast of Stonyford, near diversion canal inflow to reservoir 369 Comment
  CHSC79099  Plagiobothrys fulvus B. Castro 2000-3-17 1040 Colusa Vicinity of Sites, Antelope Valley, and Huffmaster Rd. 182 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
  UC78155 Image available Plagiobothrys humistratus Katharine Brandegee 1888-4 Colusa Colusa Junction Comment
  POM174576  Plagiobothrys infectivus Roxana S. Ferris 1926-4-23 6412 Colusa Near Mountain House on the Williams-Stonyford Road. 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
  UCD56901  Plagiobothrys nothofulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3504 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
  HSC99265  Plagiobothrys nothofulvus D. R. Junell 1965-4-18 20 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  CHSC29711  Plagiobothrys scriptus K. R. Stern 1980-4-3 6622 Colusa North central portion of Delevan National Wildlife Refuge. 48 Comment
  CHSC89859  Plagiobothrys scriptus B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1212 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. 91 Comment
  CHSC89895  Plagiobothrys shastensis B. Castro; L. P. Janeway 2001-4-19 1233 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. At upper edge of corridor along perennial N-S-trending creek. 292 Comment
  UC78102  Plagiobothrys shastensis unknown May 1886 Colusa Stites Comment
  CHSC107976  Plagiobothrys stipitatus var. micranthus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1857 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  SD27804  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2123 Colusa 3.0 miles south of Arbuckle. 42 Comment
  UC79383  Plagiobothrys stipitatus var. micranthus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  UCD64512  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2097 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
  UCR212374  Plagiobothrys stipitatus var. micranthus Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4661 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  UCD63009  Plagiobothrys stipitatus var. stipitatus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  HSC31306  Plagiobothrys tenellus Carter Schleicher 1974-5-4 23 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  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
  RSA10706  Planodes virginica C. B. Wolf 1928-5-8 2125 Colusa Sacramento Valley. 3 mi. S of Arbuckle Comment
  SEINET3873282  Plantago elongata Richard R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street.; 0 25 Comment
  CHSC59997  Plantago erecta Linda A. Bell 1975-4-19 44 Colusa Bear Valley Road, 1 mile north of State Highway 20. 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
  UCSC009426  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams 445 Comment
  CAS-BOT-BC93146  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Sycamore Slough. Stinchfield Ranch. Comment
  CHSC79537  Platystemon californicus Simona Altman 1999-4-3 53 Colusa Bear Valley, Bear Valley Rd. 396 Comment
  UC72707  Platystemon californicus Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  UCR52384  Platystemon californicus R. Earing, C. Cavanaugh, C. Collins 1987-4-12 80 Colusa Bear Valley 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
  CDA34082  Platystemon californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC112021  Platystemon californicus David Isle 1977-4-5 2068 Colusa Mendocino National Forest. About 1.3 mile NE of Fouts Springon Upper Davis Flat. 493 Comment
  HSC72768  Platystemon californicus J. Krajanowski 1981-4-4 3 Colusa .3 mi. W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 18 mi. SW of Williams 322 Comment
  UCD14423  Platystemon californicus R. M. Rhode 1984-4-21 s.n. Colusa Colusa Co.; Bear Valley, 10 miles north of Intersection of Highways 16 and 20; 426 Comment
  JEPS124237  Platystemon californicus var. californicus Lowell Ahart 2015-4-1 20002 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
  UCD66604  Plectritis ciliosa Craig D. Thomsen 2000-5-11 2281 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
  SEINET5742209 Image available Plectritis ciliosa Gene R. Williams 1961-1 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Hwy 20.; Bear Valley Comment
  UCD137585  Plectritis ciliosa Gene R. Williams 1961-3-25 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Highway 20. Comment
  CHSC62948  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald; Lowell Ahart 1994-4-6 6066 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  UC1613289  Plectritis ciliosa subsp. ciliosa Charles M. Belshaw 1937-4-25 2848 Colusa vicinity of Cook's Spring, Devil's Ridge; Inner N. Coast Range Comment
  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
  UCD81235  Plectritis congesta subsp. brachystemon Barry Rice; E. Dean, G. Harrington, J. Alderson, M. Bibbo 2009-3-25 s.n. Colusa Bear Creek (formally Payne) Ranch. Lands to the SW of the jct of Hwys 20 and 16. Southern part of the ranch on the south side of a canyon that is immediately north of Brophy Canyon. 274 Comment
  CHSC62949  Plectritis macrocera Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 A Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat. S of Stonyford. 469 Comment
  CHSC86875  Plectritis macrocera B. Castro 2003-4-1 1410 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On cutbank of dirt road which contours along hillside. 185 Comment
  JEPS94195  Plectritis macrocera Vernon Oswald and Lowell Ahart 1998-5-7 9007 Colusa Bartlett Springs Rd. 2.1 mi. w. of Bear Valley Rd., 0.8 mi. e. of Sawtelle Valley & Grapevine Flat rds. 524 Comment
  UC999820  Plectritis macrocera S. C. Dyal, A. Carter, E. Crum 1938-5-7 698 Colusa near Williams Comment
  UCD41210  Plectritis macrocera John Snelling 1986-5-17 3 - Colusa Mill Valley campsite off of Forest Service Road 18N01. Comment
  POM204747  Poa annua A. A. Heller, H. E. Brown 1902-5-2 7449 Colusa Princeton. Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  CHSC100244  Poa bulbosa D. Isle 1988-4-13 1509 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
  JEPS124236  Poa bulbosa Lowell Ahart 2015-4-1 19991 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  UCD90600  Poa bulbosa Tom Aldrich 1963-4-26 s.n. Colusa Colusa. Comment
  CHSC32216  Poa secunda subsp. secunda James Jokerst 1980-8-6 1057 Colusa North Coast Ranges. Near Snow Mountain. Comment
  JEPS80396  Poa secunda subsp. secunda L. R. Heckard and J. Hickman 1981-6-22 5629 Colusa below (s of) Dark Hollow trail Snow Mt 1981 Comment
  CHSC107975  Pogogyne zizyphoroides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1858 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  RSA518656  Polanisia dodecandra subsp. trachysperma L. R. Heckard, Rimo Bacigalupi, B. Doren 1971-9-9 2788 Colusa About 2 miles NW of Sites. 244 Comment
  UC1192334  Polygonum amphibium var. emersum Herbert L. Mason and Verne Grant 1946-8-6 12970 Colusa pond 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  CHSC84938  Polygonum aviculare Lowell Ahart 2003-10-23 10657 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  JEPS75842  Polygonum minimum L. R. Heckard 1974-9-10 3902 Colusa West Peak Snow Mt. (ne slope) 2103 Comment
  JEPS75839  Polygonum sawatchense subsp. sawatchense L. R. Heckard 1974-9-11 3949 Colusa just nw rocky promontory overlooking Fouts Spring 1798 Comment
  UC1299697  Polygonum sawatchense subsp. sawatchense Freed W. Hoffman 1948-6-27 2528 Colusa 8.6 mi sw Fouts Spring (w Colusa Co.); Upper Letts Valley 1310 Comment
  RSA725017  Polypogon monspeliensis L. Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS127192  Polystichum imbricans subsp. curtum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20721 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
  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
  CAS-BOT-BC102381  Populus fremontii Roxana S. Ferris 1917-4-17 624 Colusa Sycamore, Sycamore Slough Comment
  UCR225398  Potamogeton pusillus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5108 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UC1607563  Potentilla drummondii Barbara Ertter with Elizabeth Neese 1989-7-2 8627 Colusa ca. 11 air mi due w Stonyford (Long Glade s of Milk Ranch just w of Snow Mt. West); just w Snow Mt. West 1956 Comment
  UCD164036  Poterium sanguisorba Amber Flores 2016-4-9 2 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just west of Cowboy Camp on east side of Bear Creek. 311 Comment
  UCD35780  Poterium sanguisorba Beecher Crampton 1962-4-17 6217 Colusa Sycamore. Comment
  POM174580  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga 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
  JEPS108724  Pseudognaphalium californicum Lowell Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  UCD159336  Pseudognaphalium californicum D. S. Park; E. Dean 2010-6-5 120 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  CHSC113053  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UCD133714  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CHSC101626  Psilocarphus brevissimus var. brevissimus David W. Isle 2002-4-18 1657 Colusa Mendocino National Forest; N of Fouts Springs, N of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) Edge of E-flowing ephemeral drainage in chamise site burned during 8/8/01 Trough Fire and part of Helicopter Hydromulch Study Plot. 524 Comment
  CHSC107977  Psilocarphus oregonus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1856 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
  JEPS40463  Psilocarphus tenellus W. L. Jepson 1932-5-7 16267 Colusa Indian Valley Indian Valley (w Colusa County) 518 Comment
  UC638695  Psilocarphus tenellus Ethel Crum 1938-5-7 2010 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCR138881  Psoralea californica A. Burgard, J. Goldsmith, J. Kalt 1996-5-4 74 Colusa 8.4 mi north of Indian Reservoir Road on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  JEPS80462  Pteridium aquilinum var. pubescens Alice Q. Howard 1972-7-10 3 Colusa trail from Fouts Camp to Box Springs (n side of ridge separating Trout and Paradise Creeks); Snow Mt 1676 Comment
  HSC44470  Pterostegia drymarioides R. York 1978-4-22 137 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80464  Pyrola picta Alice Q. Howard 1972-7-10 8 A Colusa Trail from Fouts Camp to Box Springs, tje highest of the two such areas on the North side of the ridge separating Trout and Paradise Creek. Snow Mountain 1676 Comment
  UC1562605  Pyrola picta Barbara Ertter 1989-7-1 8593 Colusa 12 air wsw of Stonyford (road to Goat Mountain Lookout 2.2 mi s of Rte M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); South Fork Stony Creek 1500 Comment
  CDA15472  Quercus berberidifolia G. F. Hrusa, T. D. Wilfred 1998-6-19 14609 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CDA16102  Quercus berberidifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15251 Colusa North Coast Ranges; Goat Mtn. Rd., +/- 1/4 mi W of Pine Flat camp. 426 Comment
  UCD169984  Quercus berberidifolia G. F. Hrusa; Dmitri Geltman 1999-8-18 15251 Colusa Goat Mtn. Rd., about 1/4 mi W of Pine Flat camp. 426 Comment
  UCD45291  Quercus berberidifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Stonyford. Fouts Spring Road. Open interior live oak scrub chaparral (Quercus wislizenii var. frutescens) in deforested slopes. Comment
  SBBG25340  Quercus douglasii S. C. Schank 1960-4-10 40 Colusa several hundred feet from river, Bear Valley Comment
  UC993121  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
  UCD45869  Quercus dumosa Hans G. Jung 1976-4-17 6 Colusa California, Colusa County: 2 miles west of Bear Valley, on north end of Walker Ridge, T15N, R6W, sec. 11. Elevation 1800 feet. 548 Comment
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Apr 18 2009
  SEINET13953272 Image available Quercus dumosa J. Major, E. Dahl 1962-1 Colusa Bear Valley Comment
  UCD163843  Quercus durata Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD45981  Quercus durata D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. Serpentine chaparral. 850 Comment
  UCD55461  Quercus durata Ellen Dean; Gordon Harrington 2006-10-6 3285 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  CHSC105193  Quercus durata var. durata B. Castro; L. P. Janeway 1999-7-5 1016 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  CHSC48382  Quercus durata var. durata Vernon Oswald 1986-5-12 2008 Colusa Brim Rd. (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  CHSC79514  Quercus durata var. durata L. P. Janeway 2000-5-31 6774 Colusa Inner North Coast Ranges. On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. 884 Comment
  UC1299701  Quercus garryana Freed W. Hoffman 1948-6-26 2517 Colusa n side Goat Mt. (near forks of Stonyford and Goat Mt. roads, w Colusa County) 1653 Comment
  UCD169982  Quercus garryana G. F. Hrusa; Dmitri Geltman 1999-8-18 15249 Colusa Goat Mtn. summit. 1706 Comment
  CHSC92580  Quercus garryana var. breweri D. Isle 2005-7-14 1154 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Board Camp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  JEPS82547  Quercus garryana var. breweri L. R. Heckard 1983-7-27 6112 Colusa s flank Snow Mt. (slopes around Summit Springs) 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
  UC1051744  Quercus kelloggii Helen K. Sharsmith 1953-6-20 4300 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  HSC90026  Quercus lobata Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-14 49 Colusa Bear Valley Rd. 1.5 mi NW of Lambert Hill 427 Comment
  RSA759171  Quercus lobata Doug Goldman 2004-11-1 2916 Colusa East side of Route 45 (Princeton Road). 23 Comment
  UC1179011  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Sink, Butte Creek Comment
  SBBG111415  Quercus palmeri J. M. Tucker 1991-8-19 4496 -a Colusa across Sulphur Crk from and SE of the hotel at Wilbur Springs 426 Comment
  UCD14529  Quercus palmeri John M. Tucker 1991-8-19 4496 -A Colusa California, Colusa Co.; across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs; Comment
  UCD47499  Quercus wislizeni W. P. Hackett 1960-4-12 29 Colusa 1.7 miles north of Bartlett Springs Road from junction of State Highway 16 and State Highway 20, Colusa County, California. 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
  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
  UCR225462  Quercus wislizeni var. frutescens Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5116 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail 548 Comment
  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
  CHSC100252  Ranunculus californicus David Isle 1990-6-6 1521 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  UCR47929  Ranunculus canus Dave Read 1975-4-20 08 Colusa Inner Coastal Ranges. Bear Valley Road, 8.7 miles north of intersection with State Highway 20 412 Comment
  HSC47743  Ranunculus muricatus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3948 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  HSC72141  Ranunculus occidentalis J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9573 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD64518  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2117 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
  RSA268199  Ranunculus occidentalis var. eisenii Lyman Benson 1935-3-27 6327 Colusa 3 miles E of Lake County line Inner N coast, Sacramento River, Ukiah-Tahoe 610 Comment
  SBBG83437  Ranunculus orthorhynchus var. bloomeri C. C. Shock 1980-5-3 62 Colusa Bear Valley, ca. 12 mi NW of State Hwy 20 384 Comment
  CAS-BOT-BC74220  Raphanus sativus Roxana Stinchfield 1916-7-11 438 Colusa Stinchfield Ranch near Sycamore. Comment
  RSA0115435  Raphanus sativus George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22509 Colusa Sacramento Valley: along CA-20 at Sycamore Cutoff, 1.3 miles west of the Sacramento River crossing. 20 Comment
  CHSC39791  Rhamnus ilicifolia Eloise Gallatin 1935-5-12 Colusa Above Stonyford. Comment
  UC71642  Rhamnus ilicifolia Miss Alice King 1905-1 Colusa College City Comment
  CHSC105169  Rhamnus tomentella subsp. crassifolia B. Castro; L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  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
  CHSC88560  Rhamnus tomentella subsp. crassifolia L. P. Janeway; B. Castro 2001-6-3 7096 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 2.7 km (air) south of Bartlett Springs Road. 799 Comment
  JEPS79008  Rhamnus tomentella subsp. crassifolia Edward Lee with C. Belshaw 1936-12-13 2612 Colusa Stoneyford to Lodoga Road Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  UCR228656  Rhamnus tomentella subsp. crassifolia Ellen Dean, Davis Botanical Society 2008-5-31 4996 Colusa West of Hwy I-5 at Maxwell, along Goat Mountain Road,following Little Stoney Creek, Little Stoney Creek Canyon 414 Comment
  POM136497  Rhamnus tomentella subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa In Oak grove Phillips Ranch Comment
  UC1618009  Rhamnus tomentella subsp. tomentella Donald G. Nelson 1940-6-9 693 Colusa e. slopes Snow Mt. (at Happy Camp a private summer camp on Paradise Creek which empties below into the Middle Fork of Stony Creek, n.w. boundary of county); , Happy Camp 731 Comment
  CDA21471  Rhododendron occidentale G. F. Hrusa 1989-5-7 6083 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  HSC3157  Rhus aromatica C. M. Belshaw 1937-4-25 2813 Colusa Cooks Springs. Comment
  UCD116923  Rhus aromatica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. At Stoney Creek. 450 Comment
  POM174573  Rhus trilobata var. quinata Roxana S. Ferris 1926-4-23 6590 Colusa 2 miles from Stony Ford. Comment
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 Comment
  JEPS75751  Ribes lobbii L. R. Heckard and R. Bacigalupi 1976-9-6 4432 Colusa just w Fouts Camp; Snow Mt. 1859 Comment
  HSC94175  Ribes malvaceum var. malvaceum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 4 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  UCD120073  Ribes quercetorum Gordon Harrington 2012-2-14 s.n. Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property. Top of small canyon. 306 Comment
  UCD65630  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS80215  Rorippa nasturtium-aquaticum L. R. Heckard and J. Hickman 1980-7-3 5371 Colusa Summit Springs sw slope Snow Mt., Summit Springs 1554 Comment
  UCD63733  Rosa californica Craig D. Thomsen 2008-5-23 2743 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 421 Comment
  UCD92281  Rostraria cristata Beecher Crampton 1958-5-19 4823 Colusa along U.S. Hwy. 99 W. About 3 miles south of Maxwell. Comment
  JEPS80824  Rubus parviflorus L. R. Heckard and J. C. Hickman 1981-7-31 5794 Colusa e side Snow Mt.; e side Snow Mt., Dark Hollow Creek 1584 Comment
  CAS-BOT-BC158727  Rubus ursinus Roxana S. Ferris 1926-4-21 6310 Colusa Oak Graove Sycamore Slough, near Sycamore Comment
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  UCD82155  Rumex conglomeratus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5681 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD61462  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
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD61437  Rumex pulcher Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3882 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCR206365  Rumex pulcher George K. Helmkamp, E. A. Helmkamp 2009-5-20 14745 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  HSC102730  Saccharum ravennae J. P. Smith 2013-8-23 13779 Colusa Along State Route 16 above Cache Creek. 192 Comment
  UCR146703  Sagittaria June McCaskill, Et al. 1954-8-9 363 Colusa c. 1 mi east of Princeton and 500 yds. south of Glenn County line 23 Comment
  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
  UCD138036  Sagittaria montevidensis subsp. calycina Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa 8 miles north of Colusa. Comment
  UCD138042  Sagittaria montevidensis subsp. calycina June McCaskill; W. A. Harvey 1954-8-9 366 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  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
  JEPS94159  Salix breweri Vernon Oswald and Lowell Ahart 1998-4-21 8944 Colusa Stonyford-Lodoga Rd. 3.7 mi. s. Stonyford 384 Comment
  UCD55470  Salix breweri Ellen Dean; Gordon Harrington 2006-10-6 3294 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UCD56929  Salix breweri Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3532 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 353 Comment
  UCD163351  Salix exigua Craig D. Thomsen 2000-5-12 2359 Colusa Walker Ridge. Along road to Elgin Mine. 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
  UCD84434  Salix exigua Jack Alderson 2009-4-8 32 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CDA12799  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa Inner North Coast Ranges; On Sites-Lodoga Rd. ~2.5 m. NW of Sites at base of Little Antelope Grade. Comment
  UCD163864  Salix laevigata Craig D. Thomsen 2001-5-31 2549 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD164152  Salix laevigata Craig Thomsen 1999-4-27 2002 Colusa Bear Creek Canyon. About 5 miles north of Hwy 20, 0.25 mile south of Wilbur Bridge. Comment
  UCD82128  Salix laevigata Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5658 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR243136  Salix laevigata G. Robinson 1984-4-21 8 Colusa Inner North Coast Range, Bear Valley, 3.3 miles north of Hwy 20, about 80-90 m west of Wilbur Springs Rd. 390 Comment
  HSC103855  Salix lasiolepis G. Fred Hrusa 1999-5-16 15048 Colusa Below summit ridge of Goat Mountain on south side. 1723 Comment
  CHSC101508  Salsola australis P. Akers 2003-10-7 Colusa 5th St. and Hillgate Rd., Arbuckle, just e of Hwy 5 behind Shell Station on RR tracks. Comment
  CHSC94970  Salsola soda Lowell Ahart 2006-9-26 13348 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
  JEPS118679  Salsola soda B. Castro with Dave Bogener 2011-9-1 1913 Colusa Sacramento Valley. 10 air mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Moulton Weir 7.5' quad. Comment
  CDA12015  Salvia columbariae G. F. Hrusa 1990-4-8 7667 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  CHSC19702  Salvia columbariae L. A. Wright Jr. 1971-3-27 7 Colusa Scattered ca. 7 mi w of Williams on Hwy 20. Comment
  CHSC27518  Salvia columbariae Michael F. Henetz 1978-4-15 16 Colusa Ca. 65 m n of Salt Creek, ca 15 m n of Hwy. 20, ca. 17.7 km wsw of Williams. 143 Comment
  CHSC27525  Salvia columbariae Greg C. Halcomb 1978-4-9 10 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC44458  Salvia columbariae R. York 1978-4-22 128 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC66000  Salvia columbariae C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 51 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  HSC85950  Salvia columbariae Susan Carter, Eric May, Sarah McNaull 1987-4-12 153 Colusa Leesville Grade 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
  JEPS75722  Sambucus mexicana L. R. Heckard 1974-9-9 3855 Colusa about 1/4 mi se Foutch Camp (e side of about 60 ft high rocky outcrop); Snow Mt. 1828 Comment
  JEPS85071  Sambucus mexicana L. R. Heckard and J. C. Hickman 1982-7-6 5935 Colusa slope above and e Summit Springs (s side of mt.); Snow Mt. 1584 Comment
  UC71773  Sambucus mexicana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CAS-BOT-BC223208  Sanicula bipinnatifida Roxana S. Ferris 1917-4-14 589 Colusa 5 mi west of Arbuckle, Arbuckle-Rumsey Road Comment
  CAS-BOT-BC223209  Sanicula bipinnatifida Roxana S. Ferris 1926-4-23 6421 Colusa Williams - Stonyford Road Comment
  POM174565  Sanicula bipinnatifida Roxana S. Ferris 1926-4-23 6421 Colusa On grade, Williams- Stonyford Road 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
  UCD56685  Sanicula tuberosa Gordon Harrington 2007-3-25 10 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 584 Comment
  UCD82528  Sanicula tuberosa Craig Thomsen; G. Harrington 2009-5-12 2884 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  RSA530101A  Schoenoplectus glaucus D. W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles north of Ware Road 24 Comment
  UCD49961  Schoenoplectus mucronatus June McCaskill 1954-8-9 359 Colusa Ca. 2 miles E of Princeton and 300 yards S of Glenn County line. Comment
  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
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  CHSC94324  Scirpus diffusus Lowell Ahart 2006-7-25 13062 Colusa In the west part of a large wet meadow and bog, about 20 yards east of the poor dirt road, about 100 yards south of the cabin, about 3/4 mile (air) northwest of Jonesville, about 5 miles (air) northeast of Butte Meadows. 1569 Comment
  UC1100902  Scirpus maritimus Malcolm A. Nobs, S. Galen Smith 1949-9-9 1872 Colusa rice fields 3 mi w Williams; w of Williams Comment
  UCR261651  Scleranthus annuus subsp. annuus Ann Howald 2003-4-24 2318 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  UCD163345  Scribneria bolanderi Craig D. Thomsen 2000-5-11 2351 Colusa Walker Ridge. Buck Flat. 129 Comment
  CHSC86868  Scrophularia californica B. Castro 2003-4-10 1420 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Cutbank of dirt road. 131 Comment
  RSA589943  Scrophularia californica Michael A. Vincent, Robert M. Rhode 1996-3-30 7278 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct. Wilbur Springs Rd. Comment
  SBBG6519  Scutellaria siphocampyloides H. and M. Dearing 1939-5-12 3342 Colusa near Leesville 457 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
  RSA700358  Senecio clevelandii L. P. Janeway 2001-6-6 7112 Colusa Eaton Springs, about 2.4 km. east of Walker Ridge Road. 713 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
  CAS-BOT-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  UCD92837  Setaria viridis Beecher Crampton 1958-6-26 4974 Colusa along Grieve Road, 5.5 miles south of College City. Comment
  CHSC112276  Sidalcea diploscypha Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18647 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD14553  Sidalcea diploscypha John M. Tucker 1980-5-3 4443 Colusa California, Colusa Co.; Bear Valley, 4.3 mi. south of junction of Brim Road and Bear Valley Road; Comment
  UCD57860  Sidalcea diploscypha Gordon Harrington 2007-4-17 28 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  UCR52397  Sidalcea diploscypha N. Williams, Terry Hines, Ellen Purcell 1988-4-16 53 Colusa 2 mi W on Brim Rd. from Bear Valley Rd. intersection 518 Comment
  SBBG117358  Sidalcea diploscypha R. E. Rolley 1977-5-8 Colusa 0.3 mi NNW on Bear Valley Rd from Hwy 20 Comment
  UCD163840  Sidalcea hartwegii Craig D. Thomsen 2001-4-12 2470 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC767046  Silene antirrhina R. F. Hoover 1938-4-24 3215 Colusa Sand Creek foothills w Arbuckle; Sand Creek foothills w of Arbuckle Comment
  RSA477841  Silene californica D. A. Young 1969-5-4 P- 377 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  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
  CHSC79487  Silene laciniata subsp. californica B. Castro; L. P. Janeway 2000-5-3 1125 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  RSA0060081  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles west northwest of its junction with State Hwy. 20. 378 Comment
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
Read comments
Aug 11 2014
  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
  JEPS73457  Silene verecunda subsp. platyota L. R. Heckard 1972-7-8 3061 Colusa saddle between East and West Peaks of Snow Mt. saddle between East and West Peak of Snow Mt. 1981 Comment
  JEPS83163  Sinapis alba L. R. Heckard with J. Hickman 1980-7-3 5332 a Colusa SW Snow Montain, just W of Summit Springs 1548 Comment
  RSA249346  Sinapis arvensis Thomas W. Nelson 1972-4-8 605 Colusa Beside the Bear Valley road ca 2 mi N of Hwy 20. Comment
  UCD61438  Sisymbrium altissimum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UC10834  Sisymbrium officinale J. Burtt Davy May 1898 4273 Colusa near Willows 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
  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
  JEPS80059  Smilacina racemosa L. R. Heckard with J. Hickman 1979-6-15 5059 Colusa saddle trail between east peak and west peak Snow Mt 2103 Comment
  JEPS120808  Solanum americanum Lowell Ahart 2013-10-1 19082 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCR201554  Solanum americanum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14256 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  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
  CHSC57525  Solanum parishii Shelly A. Kirn 1991-4-6 12 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  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
  NY821173  Solanum parishii R. J. Stinchfield 1916-6-18 299 Colusa Near College City Comment
  UCD13386  Solanum parishii Charles Martin 1986-5-17 35 Colusa Mendocino National Forest. 3.7 miles west of Stonyford on Forest Service Road 18NO1. Comment
  NY723192  Solanum rostratum L. Ahart 1980-6-11 2370 Colusa 9¼ miles north of Colusa 35 Comment
  CAS-BOT-BC157051  Solanum umbelliferum R. J. Stinchfield 1916-6-18 299 Colusa Timber near College City Comment
  JEPS16203  Solanum umbelliferum Rimo Bacigalupi, Arthur Holmgren 1950-4-25 3175 Colusa 10 mi nw of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  RSA695736  Solidago canadensis subsp. elongata D. W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles west from junction Lagoda-Stonyford Road. 427 Comment
  JEPS105309  Solidago elongata Dean W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles West from junction Lagoda-Stonyford Road, 426 Comment
  SEINET7042568  Solidago sparsiflora 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
  CHSC91068  Solidago velutina subsp. californica D. Isle 2002-8-12 180 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 585 Comment
  CHSC117781  Solidago velutina subsp. sparsiflora David Isle; Terril Wolt 2016-7-15 2168 Colusa North Coast Range:~5 1/2 miles W of Stonyford off S side Fouts Springs Rd M10 (18N01.2). Also ~5/8 mile SE of M10 Jct. w/ Trough Sp R Rd M5 (18N07.1) Fouts Spring California. 609 Comment
  CHSC107288  Sonchus asper subsp. asper L. P. Janeway; B. Castro 2011-7-9 10511 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Just off of the northwest corner of the marsh. 49 Comment
  CAS-BOT-BC235305  Sorghum halepense Roxana Stinchfield 1918-7-9 408 Colusa Phillips ranch near Sycamore Comment
  CAS-BOT-BC235306  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  SACT002290  Sorghum halepense Herbert Mason 1945-9-19 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River , 1 mile north of Colusa. Comment
  UCR201571  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-10-14 14268 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  UC8724  Spergularia macrotheca var. leucantha J. Burtt Davy May, 1898 4272 Colusa near Willows; near Willows Comment
  CAS-BOT-BC390300  Spergularia macrotheca var. macrotheca Malcom A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan Comment
  CAS-BOT-BC390763  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  CAS-BOT-BC390768  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 639 Colusa 6 mi. west of Colusa Comment
  CAS-BOT-BC390769  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 637 Colusa 2 mi. so. of Maxwell Comment
  UC884260  Stachys ajugoides var. ajugoides Roxana Stinchfield 1916-7-11 427 Colusa near Sycamore Slough; Davis Tule Comment
  CHSC95011  Stachys ajugoides var. rigida Lowell Ahart 2006-10-31 13539 Colusa On the south side of road M 10, about 6 miles by road west of Stonyford. 583 Comment
  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
  SEINET13710181  Stachys albens Lowell William Ahart, Lowell William Ahart 2003-1 10381 -A Colusa 2 Mi. SW Jct. Hwy 20 and Bear Valley Road, 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23' 59.5"W) 1708'W) 521 Comment
  SEINET3450931  Stachys albens Unknown 2003-7-14 10381 A Colusa Williams, Williams, about 21 road miles southwest, south side of highway 20, about 2 miles southwest of the intersection of highway 20 and Bear Valley Road 520 Comment
  UCD125559  Stachys albens D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley Road. Bear Valley Creek. 370 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
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  SEINET10836144  Stapfia colusana Davy 1898-5-26 DAVY s.n. Colusa Near Princeton, on road to Norman Comment
  UC72583  Stellaria media Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCR206676  Stellaria media George K. Helmkamp, E. A. Helmkamp 2009-1-31 14321 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
  CHSC86516  Stellaria nitens B. Castro 2003-3-17 1382 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  UCD112598  Stellaria nitens Christopher Mallek 2008-4-17 WR2- 2 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD63015  Stellaria nitens Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4667 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. South of corral on west side of Bear Creek, just south of Hwy 20. 321 Comment
  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
  CDA15548  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa North Coast Ranges; Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  CDA7157  Stephanomeria virgata subsp. pleurocarpa L. Ahart 2004-10-4 11424 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  JEPS110412  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2006-8-9 13099 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 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
  UCD167947  Streptanthus James Neilson 1982-7-1 4088 Colusa near mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) 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
  UCD110407  Streptanthus breweri Daniel Slakey; CNPS volunteers 2011-6-12 3 Colusa Walker Ridge. Brim Rd., 1/4 mile E of Walker Ridge Rd. Population extends about 1 mile farther east. 647 Comment
  CAS-BOT-BC61237  Streptanthus breweri Roger Raiche 1985-5-25 50460 Colusa Walker Ridge, Brim Road, near intersection West Walker Road. 637 Comment
  SEINET11998398  Streptanthus breweri Unknown 1986-1 60216 Colusa S of Snow Mt., nr intersection of road to Summit Springs & roads 17N29 & 24N02 1280 Comment
  UCD73921  Streptanthus breweri G. Ledyard Stebbins 1966-6-6 6431 Colusa Above Frenzel Creek, on slopes of Lovelady Ridge. 609 Comment
  UC1051550  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-21 4307 Colusa borders of creek ca 1 mi within boundary of National Forest Inner North Coast Ranges, Mendocino National Forest, Little 670 Comment
  UC1051693  Streptanthus breweri var. breweri Helen K. Sharsmith 1953-6-18 4256 Colusa Candy Bucket Spring Inner North Coast Ranges, Mendocino National Forest (road from Stoneyford to Mill Spring) 609 Comment
  UC1552822  Streptanthus breweri var. breweri Frederica Bowcutt 1985-5-10 510 Colusa road bank along Bear Valley Rd about 3 mi se Wilbur Springs (1 mi w of Hwy 20); Wilbur Springs 15' Quad Comment
  UC2014148  Streptanthus breweri var. breweri Madeline Christopher 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. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. Comment
  UC956510  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-18 1019 Colusa Wilbur Springs Road Comment
  UCD58119  Streptanthus breweri var. breweri Ellen Dean; PLB 102 Class 2007-4-29 3714 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Craig Canyon. Along unimproved road. 328 Comment
  UCD66907  Streptanthus breweri var. breweri Jack Alderson 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the WNW of Cowboy Camp on the west side of Bear Creek. 427 Comment
  UCD82160  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5693 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  JEPS93866  Streptanthus drepanoides Vernon H. Oswald and Lowell Ahart 1998-7-15 9275 Colusa Bartlett Springs Road 2.6 mi w of Bear Valley Road (0.3 mi e of Sawtelle Valley and Grapevine Flat Roads) 624 Comment
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Jul 24 2018
  CHSC35582  Streptanthus glandulosus J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  HSC44457  Streptanthus glandulosus R. York 1978-4-22 127 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC72152  Streptanthus glandulosus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9565 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD167944  Streptanthus morrisonii James Neilson 1982-7-1 4090 Colusa Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  SEINET11993694  Streptanthus morrisonii Unknown 1984-1 RR 40260 Colusa W of Ladoga, Goat Mt Rd, along Little Stonyford Cr (ca 0.3 mi W of rd origin at Ladoga-Stonyford Rd) 442 Comment
  CAS-BOT-BC48091  Styrax redivivus A. A. Heller 1919-5-10 13111 Colusa Grade west of Leesville Comment
  RSA388855  Styrax redivivus Clinton C. Shock 1980-5-3 68 Colusa 2 miles W of base of Bear Valley, 14.6 miles north of State Hwy 20. East of Walker Ridge. 488 Comment
  UCD18644  Styrax redivivus Roman Gankin 1959-4-19 330 Colusa along road to Walker Ridge from Bear Valley. Comment
  UCD80818  Styrax redivivus Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5274 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. E-facing slope above Eula Canyon and top of formation known as the Blue Ridge in the NE corner of the ranch. 529 Comment