Search Results — 2000 specimen records retrieved (1626 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
  UC1543049  Abies magnifica var. shastensis Donald G. Nelson et. al. 1940-6-8 691 Colusa up to very summit Snow Mountain (w boundary of Colusa County,) Comment
  CAS-BOT-BC21709  Achillea millefolium J. Clausen 1939-6-26 1743 -2 Colusa 17 miles west of Williams, just before entering Lake County Comment
  SEINET223541 Image available Achnatherum lemmonii L. R. Heckard 1972-7-10 3135 Colusa West of Trout Creek Snow Mt. 1829 Comment
  UCD50713  Achnatherum lemmonii Beecher Crampton 1958-5-19 4799 Colusa 5.8 miles south of Lodoga, Colusa County. Comment
  CHSC32199  Achnatherum occidentale subsp. californicum James D. Jokerst 1980-8-8 1082 Colusa North Coast Ranges. Near Snow Mountain (West). 2133 Comment
  CAS-BOT-BC29878  Achyrachaena mollis Mrs. H. C. Cantelow 1936-4-11 1150 Colusa Bear Creek Canyon Comment
  CAS-BOT-BC29880  Achyrachaena mollis Roxana S. Ferris 1917-4-12 500 Colusa 4 miles east of Williams Comment
  UCD64428  Achyrachaena mollis Craig D. Thomsen 2000-4-28 2204 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
  POM284473  Achyrachaena mollis Lyman Benson 1933-4-16 4330 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  CHSC112211  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 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
  CHSC112212  Acmispon brachycarpus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18648 A Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD63918  Acmispon brachycarpus Craig D. Thomsen 2001-5-24 2508 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCD146600  Acmispon grandiflorus G. F. Hrusa 1998-6-19 14638 Colusa North Coast Ranges. Below Fouts Springs on Fouts Springs Road to Stonyford. Immediately below Candy Bucket Spring crossing. 675 Comment
  CHSC52808  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 Comment
  OBI59416  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On rd above and W of Fouts Springs 762 Comment
  UCD104192  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Along Trough Spring Ridge road, 0.2 mile north of its junction with Crackerbox Ridge road (about 6 1/2 air miles southeast of Stonyford). 1127 Comment
  HSC48196  Acmispon micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3960 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CHSC81265  Acmispon rubriflorus L. P. Janeway; B. Castro 2001-4-25 7026 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 329 Comment
  UCR261740  Acmispon rubriflorus Ann Howald 2003-6-9 2364 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, just north of Eagle Eye camping area 377 Comment
  UCR261747  Acmispon rubriflorus Ann Howald 2003-6-9 2369 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd, then c. 0.1 mile east on ranch road 397 Comment
  CHSC79739  Acmispon wrangelianus L. P. Janeway; B. Castro 2000-5-2 6692 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  HSC72174  Acmispon wrangelianus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9551 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  HSC97663  Acmispon wrangelianus J. Marshall, J. Savage, L. Allison 1997-3-30 11 Colusa Mt. Diablo Meridian, 1.6 mi. E of Brim Rd., Walker Ridge intersection. 457 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
  CAS-BOT-BC29714  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CAS-BOT-BC133152  Adenostoma fasciculatum Roxana Stinchfield 1916-6-18 304 Colusa College City Comment
  CHSC1534  Adenostoma fasciculatum V. Holt 1935-5-12 Colusa Near Stonyford. 335 Comment
  UC205569  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains e. of R.R. Hershey Comment
  UCD84556  Adenostoma fasciculatum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6081 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CHSC112264  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa Inner North Coast Range. On the south side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCR206362  Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14749 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
  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
  CDA4029  Aeschynomene rudis G. D. Barbe, June McCaskill 1990-9-5 4397 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4030  Aeschynomene rudis G. D. Barbe, June McCaskill 1990-9-5 4397 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  UCD14572  Aeschynomene rudis June McCaskill; with Jim Hill 1990-9-5 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  SFV15097  Aeschynomene rudis B. J. McCaskill, G. D. Barbe (4397) 1990-9-5 s. n. Colusa West side of Boggs Road between Dodge and Fonseca Roads. MDB&M. Comment
  CHSC48483  Agastache urticifolia Vernon Oswald 1984-7-20 1613 Colusa Near the Lily Pond n of Letts Lake in Mendocino Nat. Forest. 1280 Comment
  JEPS80777  Agastache urticifolia L. R. Heckard and J. C. Hickman 1981-7-30 5750 Colusa Trout Creek trail se side Snow Mt.; se side of Snow Mt. 1615 Comment
  CHSC32211  Ageratina occidentalis James Jokerst 1980-8-7 1062 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  UC2014168  Agoseris grandiflora Ellen Dean, G. Harrington, C. Thomsen, Chiao-Yi Cheng, R. Wilmarth 2009-5-20 5643 Colusa Colusa County: Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. Comment
  CHSC56746  Agoseris heterophylla Joel Hoskins 1989-4-1 2 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
  UCD56897  Agoseris heterophylla Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3500 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD57283  Agoseris heterophylla Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3651 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  UCD64516  Agoseris heterophylla Craig D. Thomsen 2000-4-12 2102 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD66469  Agoseris heterophylla Craig D. Thomsen 2001-4-12 2459 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD82475  Agoseris heterophylla Craig Thomsen; G. Harrington 2009-5-12 2853 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  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
  JEPS94736  Agrostis exarata Vernon H. Oswald and Lowell Ahart 1998-7-15 9273 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  RSA724965  Agrostis exarata L. Ahart 2006-8-9 13167 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  UCD164139  Agrostis exarata Craig Thomsen 1997-6-21 1928 Colusa Bear Valley. About 9 miles north of Hwy 20. Near corner of sharp turn in central Bear Valley. Comment
  JEPS73446  Agrostis variabilis L. R. Heckard 1972-7-8 3043 Colusa on ridge running se West Peak, Snow Mt. (on n side) 2011 Comment
  CAS-BOT-BC131915  Allium Roger Raiche 1985-3-19 RR 50160 Colusa Colusa-Lake County line, Walker Ridge, 3.4 miles south of north end of Barrel Springs Campground on Walker Ridge Road 1036 Comment
  CAS-BOT-BC459583  Allium amplectens Katherine Esau 1934-5-5 s.n. Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  JEPS120965  Allium amplectens Lowell Ahart 2013-5-1 18682 Colusa Near a small drainage, N of the wash and of Hwy 20, just E of the Lake County Line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS80119  Allium amplectens L. R. Heckard with J. Hickman 1980-7-1 5275 A Colusa near bottom of s side of East Peak; Snow Mt. 2042 Comment
  POM174568  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford. Comment
  UCD81213  Allium amplectens Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5550 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destanella Flat area on the S side of Hwy. 20. 574 Comment
  UC119994  Allium amplectens T. S. Brandegee 1890-6-22 Colusa Snow Mt. Comment
  UCD141837  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  JEPS73488  Allium falcifolium L. R. Heckard 1972-7-9 3100 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2011 Comment
  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
  CAS-BOT-BC135883  Allium fimbriatum subsp. purdyi M. S. Baker 1937-5-17 8657 Colusa Hiway 20, nr. Lake Co. line. Comment
  HSC48164  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  HSC67119  Allium fimbriatum var. purdyi Dale McNeal 1980-4-26 2318 Colusa Above Bear Valley Rd., 1.4 mi. N of its junction with Hwy. 20 Comment
  RSA32008  Allium fimbriatum var. purdyi A. A. Heller 1942-5-29 s.n. Colusa 0.5 miles east of the Lake Co. Line 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
  SBBG128800  Allium fimbriatum var. purdyi L. Ahart, J. Dittes, J. Guardino 2013-4-26 18641 Colusa rocky serpentine outcrop on N side of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  SEINET3884489  Allium fimbriatum var. purdyi D. W. McNeal 1977-5-18 2028 Colusa On a hillside above a small stream beside Hwy. #20, 0.9 mi. w. of the jct. of Hwy. #16.; 0 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
  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
  CHSC79617  Allium serra B. Castro; L. P. Janeway 2000-5-3 1123 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 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
  HSC71314  Allium serra Thomas W. Nelson, Jane P. Nelson 1979-4-11 4611 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  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
  UCD141808  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mi. toward Clear Lake from junction of California Highway #16 and #20. Comment
  UCD141824  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  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
  UCD15595  Allium serra Lisa Montany 1985-4-13 9 Colusa Bear Valley, 8.6 miles north of Wilbur Springs Rd and Hwy 20 intersection. 457 Comment
  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
  CHSC36827  Allophyllum gilioides B. Castro 1982-3-27 3 Colusa On roadcut on n side of Hwy 20 at Salt Canyon, n side of Salt Ck, 11 mi wsw of Williams. 143 Comment
  HSC44459  Allophyllum gilioides R. York 1978-4-22 129 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CHSC62939  Allophyllum gilioides subsp. violaceum Vernon H. Oswald; Lowell Ahart 1994-4-6 6060 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On slopes bordering Sullivan Creek. 469 Comment
  UC1051700  Alnus rhombifolia Helen K. Sharsmith 1953-6-21 4310 Colusa near Stonyford; Inner North Coast Ranges, Big Stoney Creek 518 Comment
  SEINET10510969  Alopecurus californicus Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles E of Williams. Alkali Plains. Comment
  CHSC85730  Alopecurus saccatus G. F. Hrusa; K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges. Along N side of Leesville Rd. approx. 4 m. NW of Hwy. 20. 290 Comment
  RSA198503  Alopecurus saccatus Roxana S. Ferris 1917-8-12 549 Colusa 4 miles east of Williams, alkali plains. Comment
  CHSC84970  Amaranthus californicus Lowell Ahart 2003-10-23 10658 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
  CDA19687  Ambrosia confertiflora D. Brown 2001-10-17 PDR 024367 Colusa Northern California; Vicinity of Colusa 0 Comment
  CAS-BOT-BC55588  Ambrosia psilostachya Roxana Stinchfield 1916-6-17 276 Colusa Cemetery, College City Comment
  CHSC61395  Ambrosia psilostachya Vernon H. Oswald; Joseph Silveira 1993-8-16 5804 Colusa Refuge located ca. 7 mi S of Willows, center N side of Tract 44, near the S boundary of the refuge. 24 Comment
  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
  CDA20509  Ambrosia psilostachya D. Isle 2004-11-17 DI 2 -04 Colusa Northwestern California; Just N of Stony Creek, N of Stonyford and S of the Glenn county line. 344 Comment
  UCD102890  Ammannia robusta P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Cortina. Comment
  CAS-BOT-BC213951  Amsinckia Roxana S. Ferris 1926-4-23 6414 Colusa At mountain house on the Williams-Stonyford Road Comment
  SEINET7096533  Amsinckia intermedia Richard R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52 N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  HSC31598  Amsinckia intermedia Thomas E. Higley 1974-5-5 84 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  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
  CHSC117804  Amsinckia lunaris Jake Schweitzer 2010-4-1 Colusa Inner North Coast Rnages. On BLM parcel, approx. 265 m W of Walker Ridge Road (Bartlett Springs Rd on some maps) 120 m SE of Til Jones Spring. 853 Comment
  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
  CHSC86529  Amsinckia lunaris B. Castro 2003-3-18 1384 a Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 Comment
  UC1199518  Amsinckia lunaris Annetta Carter 1938-5-8 1385 Colusa 3 mi n Leesville (on Lodoga Road) Comment
  UCD83661  Amsinckia lunaris Gordon Harrington 2008-4-13 77 Colusa BLM Payne Ranch. Hills SW of junction of Hwy 16 and Hwy 20. W of unnamed creek (flowing now). 388 Comment
  CHSC107984  Amsinckia lycopsoides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1852 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Ca 250 ft SE of large +/- saline/alkaline wetland marsh. 59 Comment
  CHSC37413  Amsinckia lycopsoides R. A. Schlising; K. R. Stern 1980-5-5 3583 Colusa Colusa National Wildlife Refuge; southwest of Colusa; southwest corner of refuge, north of Ware Road. Comment
  CHSC60660  Amsinckia lycopsoides Vernon H. Oswald 1993-4-14 5267 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. Along the edge of the levee road along the S leg of the tour route. 18 Comment
  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
  UCD160032  Amsinckia lycopsoides Ellen Dean; Craig Thomsen 2015-4-21 8628 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Area to the SE of Lynch Canyon on S side of undeveloped road and N of creek. Near western end of Thompson Canyon. 381 Comment
  UCD56909  Amsinckia menziesii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3512 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UC78236  Amsinckia tessellata var. gloriosa K. Brandegee May 1884 Colusa Mountain House; North Coast Ranges Comment
Read comments
Jun 20 2007
  CHSC112258  Ancistrocarphus filagineus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18626 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC72168  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9543 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  RSA293116  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane Nelson 1978-4-2 9543 Colusa Bear Valley Road, 1.3 miles from its junction with State Route 20. 366 Comment
  UC1056275  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (just w of base of grade to Indian Valley (Bartlett Mtn. Rd.)) Bear Valley; Inner North Coast Ranges Comment
  UCD162976  Ancistrocarphus filagineus Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  UCD64285  Ancistrocarphus filagineus Craig D. Thomsen 2000-3-31 2118 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
  CHSC76775  Androsace elongata subsp. acuta J. Marr; B. Hendrickson 1999-3-30 Colusa About 11 air miles W of Willows, vicinity of Squaw Flat and Logan Creek. 152 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
  CHSC32214  Antennaria geyeri James Jokerst 1980-8-6 1060 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  CHSC101033  Anthriscus caucalis John Dittes 2008-3-14 1514 Colusa Great Central Valley; Sacramento Valley; between Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air mile south of Gridley Road, ca. 1.1 air mile west of Drumheller Slough; 17 Comment
  UCD164161  Anthriscus caucalis Craig Thomsen 2000-4-28 2269 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  CAS-BOT-BC27017  Antirrhinum subcordatum Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N. of San Francisco Bay. Stony Cr. Comment
  CHSC83681  Antirrhinum subcordatum L. P. Janeway; Shirley Innecken 2002-5-1 7528 Colusa Inner North Coast Ranges. Vicinity of Grapevine Creek, Rena Canyon, and Scotties Canyon. 243 Comment
  JEPS121750  Antirrhinum subcordatum David Isle, Ronda Isle 2013-5-19 2039 Colusa COLUSA County, CA. 01 mi E of Maxwell Grade Summit; burned SW asp. upper drainage slope N of Sites Lodoga Road. 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
  CHSC62836  Apiastrum angustifolium Vernon H. Oswald; Lowell Ahart 1994-3-23 6017 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. 505 Comment
  CHSC111647  Apocynum cannabinum David Isle 1988-5-11 2102 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Above (S of) 18N01 (M10), ~200 yds NW of jct w/ OHV Trail 17N12; (3/4 mi SW of Fouts Springs Loop Rd, E Side). 670 Comment
  UCD66955  Apocynum cannabinum Ellen Dean; Davis Botanical Society 2008-5-31 4999 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  CHSC28034  Arceuthobium campylopodum J. D. Jokerst 1979-3-24 180 Colusa Comment
  SEINET11989661  Arctostaphylos canescens R. A. DeMartile 1982-1 s.n. Colusa 10 mi from Ladoga on road between Ladoga & Goat Mountain lookout 701 Comment
  SEINET11989693  Arctostaphylos canescens R. A. DeMartile 1982-1 s.n. Colusa between Ladoga & Goat Mt. lookout 792 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
  CDA34806  Arctostaphylos canescens subsp. sonomensis Peter Warner 2010-5-16 153 Colusa Walker Ridge Road, ~18.4 km N of jct. with Hwy. 20, along E (Colusa Co.) side of road, on slopes above Zimory Canyon to the west, Trout Creek to the east, and adjacent slopes on both sides of the road. Comment
  UCD66998  Arctostaphylos glandulosa Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -b 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
  CDA12247  Arctostaphylos manzanita G. F. Hrusa 1989-2-7 5807 Colusa Inner North Coast Ranges; Road to Cedar Mtn, along Little Stony Creek approx. 3 miles above junction with Stonyford-Lodoga Rd. Comment
  UCD67000  Arctostaphylos manzanita Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -c Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  UC1388337  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa road between Upper Letts Valley and Lower Letts Valley (w Colusa Co.); North Coast Ranges 1219 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
  UCR261618  Arctostaphylos manzanita subsp. manzanita Ann Howald 2003-3-11 2278 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2.2 miles north of Lodoga 365 Comment
  JEPS80051  Arctostaphylos nevadensis L. R. Heckard with J. Hickman 1979-6-15 5051 Colusa east trail from Frog Pond to cirque of east and west peaks (ne slope of West Peak ridge); Snow Mt. 1981 Comment
  CHSC22676  Arctostaphylos patula Robert A. Schlising; Glenn Keator 1962-1-31 2034 Colusa Coast Ranges. On Goat Mountain. 1097 Comment
  CAS-BOT-BC46195  Arctostaphylos stanfordiana Richard A. DeMartile 1982-10-10 s.n. Colusa Road between Ladoga and Goat Mountain Lookout. 914 Comment
  SEINET9328832  Arctostaphylos viscida Unknown 1989-2-11 5821 Colusa Common on serpentine slopes above Bear Creek, on Bear Valley Rd. approx. 1 mi N of Hwy 20. W/ Quercus durata. Comment
  CDA38841  Arctostaphylos viscida G. D. Barbe 1964-3-29 761 Colusa Three miles west of Bear Valley Road on Bartlett Springs Road at Lake/Colusa county line; west of Leesville. Comment
  CHSC62844  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald 1994-3-23 6011 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  JEPS87758  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald and Lowell Ahart 1994-3-23 6011 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  UCD56680  Arctostaphylos viscida subsp. pulchella Jack Alderson 2007-3-25 s.n. Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  UCD58104  Arctostaphylos viscida subsp. pulchella Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3351 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 536 Comment
  UCD63712  Arctostaphylos viscida subsp. pulchella Craig D. Thomsen 2008-3-21 2721 Colusa BLM Payne Ranch. In narrow canyon just south of Hwy 20 (at Colusa Co. milepost 2.63), 0.5 mile west of intersection of Hwy 16 and Hwy 20. Comment
  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
  UCD82129  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 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
  UCD82434  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 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
  UCD95197  Argemone munita K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  CAS-BOT-BC401743  Argemone munita subsp. rotundata L. Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station, Inner North Coast Ranges 548 Comment
  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
  CHSC87131  Aristida ternipes var. hamulosa B. Castro; Michelle Cedarborg 2003-5-6 1427 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. 219 Comment
  CAS-BOT-BC400399  Aristolochia californica Roxana S. Ferris 1926-4-22 6308 Colusa Sycamore Slough near Sycamore 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
  CHSC84932  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS110139  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCR196319  Artemisia douglasiana Mark A. Elvin, D. Isle, Mark S. Brunell 2006-8-3 4994 Colusa Northern Inner Coast Ranges, Mendocino National Forest, east face of Snow Mountain, Stony Creek along M10 610 Comment
  HSC44456  Asclepias cordifolia R. York 1978-4-22 126 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  RSA537477  Asclepias cordifolia Barbara Ertter 1989-7-1 8603 Colusa Road to Goat Mt Lookout 2.2 mi S of Rt M-10 (Bear Creek, ca 12 airmiles WSW of Stonyford 1500 Comment
  CHSC32203  Asclepias fascicularis James Jokerst 1980-8-7 1072 Colusa North Coast Ranges. Near Snow Mountain (east). Comment
  CAS-BOT-BC222853  Asclepias solanoana G. L. Stebbins 1966-6-6 6432 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stony ford [Stonyford] 609 Comment
  JEPS80758  Asclepias speciosa L. R. Heckard and J. C. Hickman 1981-7-29 5725 Colusa above Summit Springs (s side of mountain); Snow Mt., Colusa-Lake County Boundary 1554 Comment
  CAS-BOT-BC478831  Asparagus officinalis Roxana Stinchfield 1918-7-11 464 Colusa Davis Tule near Sycamore Slough Comment
  JEPS73499  Aspidotis densa L. R. Heckard 1972-7-10 3117 Colusa trail e of Foutch Camp Snow Mt (near Trout Creek) 1828 Comment
  JEPS95275  Aspidotis densa Vernon H. Oswald and Lowell Ahart 1994-3-23 6014 Colusa S of Stonyford (Frenzel Creek Research Natural Area, S side of Litte Stony Creek, in the section on the E side of creek) 518 Comment
  UCD64032  Astragalus clevelandii Craig D. Thomsen 2000-6-23 2411 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  CAS-BOT-BC366914  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles E of the junction of State Hwys. 20 and 53 558 Comment
  UC71640  Astragalus gambelianus Miss Alice King 1905-1 Colusa College City Comment
  UCD163837  Astragalus gambelianus Craig D. Thomsen 2001-4-12 2466 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD104819  Astragalus gambelianus J. M. Tucker 1958-3-7 3363 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  HSC44108  Astragalus rattanii var. jepsonianus Barbara Kelly 1977-4-24 390 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
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Jul 31 2014
  HSC48165  Astragalus rattanii var. jepsonianus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3929 Colusa Along Bear Valley Rd. 2 mi. from junction with State Route 20 366 Comment
  UC1613418  Astragalus rattanii var. jepsonianus Charles M. Belshaw 1937-4-25 2830 Colusa Cooks Spring, Devils Ridge Inner Coast Range, Cooks Spring, Devils Ridge Comment
  UCD163214  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-28 2254 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
  UCD56928  Astragalus rattanii var. jepsonianus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3531 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Saddle between Craig and Thompson Canyons. 394 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
  CHSC87153  Athysanus pusillus Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  JEPS53235  Athysanus pusillus Alice King May, 1906 Colusa College City Comment
  SEINET4673879  Athysanus pusillus Richard R. Halse 2013-3-27 8763 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53.; 0 558 Comment
  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
  CAS-BOT-BC170615  Atriplex argentea Roxana Stinchfield 1916-7-1 462 Colusa Colusa - Williams Road, at bridge over the Trough Comment
  CDA22995  Atriplex argentea Mike Pitcairn 2008-8-2 PDR# 1440792 Colusa Colusa Wildlife Refuge, 1.5 miles S of Hwy 20 0 Comment
  UCD21581  Atriplex argentea var. expansa Craig D. Thomsen 2002-11-14 s.n. Colusa BLM Payne Ranch. Along Hwy 20 about a quarter mile west of Hwy 16. Steep eroding slope. Serpentine derived soil. Comment
  CHSC60279  Atriplex depressa K. R. Stern 1980-6-30 6654 Colusa Vernal Pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC107934  Atriplex fruticulosa B. Castro; L. Janeway 2011-7-9 1895 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. In swale about 300 ft north of large +- alkaline marsh. At edge of swale near star-thistle thicket. 49 Comment
  CHSC80183  Atriplex fruticulosa B. Castro; G. Kuenster 2000-7-19 1208 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 42 Comment
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 Comment
  UCD163708  Atriplex joaquinana Craig Thomsen 1999-5-10 2020 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CHSC108070  Atriplex micrantha B. Castro; Dave Boegner 2011-9-1 1911 Colusa Sacramento Valley. Larkins Childrens Rancho. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 600 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Common around outer western edges of managed +- saline wetland of Gunnersfeld Ranch duck hunting club, among patches of tules and cattails. On and just below berms. 17 Comment
  CHSC59712  Atriplex persistens K. R. Stern 1980-6-30 6646 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 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
  JEPS90603  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Road) 39 Comment
  JEPS90637  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Rd., along ditchbank) 39 Comment
  UC217003  Atriplex serenana var. serenana H. M. Hall 1920-7-12 11011 Colusa 5 mi e Maxwell; e of Maxwell Comment
  CAS-BOT-BC146205  Avena barbata Roxana S. Ferris 1917-4-14 591 Colusa Arbuckle - Rumsey Road. 3 miles west of Arbuckle. Comment
  UC53770  Avena barbata J. Burtt Davy May 1898 4294 Colusa near Princeton Comment
  UCD56224  Avena barbata Beecher Crampton 1958-4-21 4727 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  UCD65638  Avena barbata Craig D. Thomsen 2000-4-12 2172 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
  SEINET3919645  Avena barbata Patricia Shesgreen 1978-4-22 33 Colusa Wilbur Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  CHSC86015  Avena fatua Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  UCD66912  Avena fatua 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
  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
  RSA726847  Azolla filiculoides Lowell A. Ahart 2007-7-7 14260 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  CHSC98782  Baccharis salicifolia Richard R. Halse 2007-3-25 7134 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. Along Salt Creek. 100 Comment
  CAS-BOT-BC100066  Balsamorhiza macrolepis James Jokerst 1985-4-5 2210 Colusa Wilbur Springs Quad. Near Coyote Peak 456 Comment
  HSC41860  Balsamorhiza macrolepis K. Irwin 1977-4-24 299 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD74309  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  UCD82618  Balsamorhiza macrolepis var. macrolepis Craig Thomsen; G. Harrington 2009-5-12 2887 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. Southeast side of Eaton Springs complex. 710 Comment
  CDA2974  Bassia hyssopifolia Margaret Bellue Oct 1932 Colusa Near Williams. 0 Comment
  CHSC69476  Bassia hyssopifolia James D. Jokerst 1988-8-23 3041 Colusa Colusa National Wildlife Refuge S of Willows, in Pond 3, E and adjacent to Ohm Rd. in southern-most cell E of the road. Comment
  SBBG119875  Bassia hyssopifolia L. Ahart 2003-8-15 10509 Colusa S side of St Hwy 20, ca. 1 mi SW of Williams 27 Comment
  UCD97545  Bassia hyssopifolia Beecher Crampton 1963-8-3 6868 Colusa 1/4 mile east of Cortena. Comment
  UCD97560  Bassia hyssopifolia P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. Comment
  JEPS80794  Berberis aquifolium var. repens L. R. Heckard and J. C. Hickman 1981-7-30 5764 Colusa se Snow Mt (along Trout Creek) 1539 Comment
  UC1563953  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of East park Reservoir N of Lodoga Comment
  JEPS73458  Boechera platysperma L. R. Heckard 1972-7-8 3062 Colusa saddle between East Peak and West Peak; Snow Mt. 1981 Comment
  JEPS80111  Boechera platysperma L. R. Heckard with J. Hickman 1980-7-1 5270 Colusa ca 10 mi w Stonyford (cirque between West and East Peaks; Colusa-Lake County line); Snow Mt. 1950 Comment
  JEPS15548  Boechera repanda G. Thomas Robbins with L. R. Heckard 1956-7-25 3705 Colusa along trail due s Snow Mt. East (and skirting the e base of the ridge forming Snow Mt. West); Snow Mt. West 1981 Comment
  CHSC117122  Boehmeria cylindrica B. Castro; Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd. off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  CHSC117123  Boehmeria cylindrica B. Castro; Tom Boullion 2009-8-24 1800 G-1 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
  CHSC96359  Boehmeria cylindrica D. Koenig; L. Bateman 2006-10-6 Colusa Sacramento Valley. By a slough along the west side of the Sacramento River, about 0.5 mi south-southeast of Stegeman. 21 Comment
  JEPS127625  Boehmeria cylindrica B. Castro with Tom Boullion 2009-9-29 1800 G-2 Colusa Ca 8 ai 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. Comment
  CHSC107166  Bolboschoenus glaucus L. P. Janeway; B. Castro 2011-4-27 10242 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
  CAS-BOT-BC28201  Bolboschoenus glaucus Maxine Wilkes 1929-8-1 s.n. Colusa Unspecified Comment
  CAS-BOT-BC28250  Bolboschoenus glaucus V. C. Bryant 1929-8-1 s.n. Colusa Colusa Ricefields. Comment
  UC1100921  Bolboschoenus maritimus Herbert L. Mason, Verne Grant 1946-8-13 13013 Colusa on Williams highway by bridge two mi w Colusa (Butte Sink); , w of Colusa Comment
  CHSC83450  Bolboschoenus maritimus subsp. paludosus Bill Maslach 2001-6-6 14 Colusa Norman Rd., Colusa/Glenn Co. line. In roadside ditch. 50 Comment
  UCD163660  Bolboschoenus maritimus subsp. paludosus Craig Thomsen 1998-6-10 1959 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CAS-BOT-BC418408  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
  CAS-BOT-BC30254  Brassica nigra Gordon H. True 1974-11-15 7841 Colusa On Delevan Road just west of Four Mile Road, 4 miles east of Delevan. 27 Comment
  CAS-BOT-BC106348  Brickellia californica A. J. Bassinger 1927-10-29 s.n. Colusa Sand Creek, Coast Range Comment
  UCD55472  Brickellia californica Ellen Dean; Gordon Harrington 2006-10-6 3296 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  SEINET9368833  Brickellia californica Unknown 1999-8-18 15245 Colusa Colusa Comment
  CHSC32208  Brickellia greenei James Jokerst 1980-8-7 1066 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  CHSC112031  Briza minor David Isle 1988-5-11 2100 Colusa Moon Glade (E of Trout Ck Trailhead) 1/2 mi W of Fouts Springs; Middle Fork Stony Creek Watershed, Mendocino National Forest. 621 Comment
  SEINET198872  Brodiaea capitata J. A. Riegel 1954-3-12 1 Colusa Above Cache Creek 6.8 miles northwest of Rumsey. Comment
  CHSC89838  Brodiaea elegans subsp. elegans B. Castro; L. Janeway 2001-5-10 1248 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge. 396 Comment
  JEPS7631  Brodiaea elegans subsp. elegans W. L. Jepson 1920-5-23 8971 Colusa Bear Valley Bear Valley (sw Colusa County) Comment
  JEPS7632  Brodiaea elegans subsp. elegans W. L. Jepson 1920-5-23 8961 Colusa foothills near Mountain House (sw Colusa Co.); Venado Comment
  UCD72482  Brodiaea elegans subsp. elegans Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3816 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  CAS-BOT-BC484269  Brodiaea elegans subsp. elegans Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley, along road to Bartlett Springs Comment
  SEINET7296497 Image available Bromus anomalus Helen K. Sharsmith 1953-1 4266 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 549 Comment
  UCD37179  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Colusa County, 12 miles northwest of Rumsey, along Highway 16. Comment
  UCD37189  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa Colusa County, 5.8 miles south of Lodoga. Comment
  CAS-BOT-BC155997  Bromus diandrus Roxana S. Ferris 1926-4-21 6277 Colusa Sycamore Slough 2 miles from Sycamore. Comment
  HSC98348  Bromus diandrus Brent Helm, Curtis Miller, Mark Steiger 1988-4-16 63 Colusa Stonyford, off side road underneath Blue Oaks 366 Comment
  UCD57551  Bromus diandrus Cindy Yip; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  JEPS80197  Bromus hordeaceus L. R. Heckard and J. Hickman 1980-7-3 5351 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw of Snow Mountain) 1548 Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 Comment
  POM92520  Bromus hordeaceus Roxana S. Ferris 1917-04 527 Colusa 4 miles east of Williams. Comment
  UCD66447  Bromus japonicus Craig D. Thomsen 2000-5-11 2292 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
  UCD163860  Bromus laevipes Craig D. Thomsen 2001-5-31 2542 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD66687  Bromus laevipes Craig D. Thomsen 2000-5-11 2315 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  HSC72175  Bromus madritensis subsp. rubens Thomas W. Nelson, Jane P. Nelson 1978-4-2 9552 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD64500  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-3-31 2084 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD58602  Bromus pseudolaevipes Beecher Crampton 1958-5-19 4814 Colusa Above Little Stony Creek. West of Lodoga. Comment
  SEINET244463 Image available Bromus rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction on 5th Street and B Street; 24 Comment
  SEINET3923292  Bromus rubens Christopher Knopp 1978-4-22 17 Colusa Wilbur Springs Quad. Bear Valley Road 1.5 miles from its junction with State Route 20.; 0 411 Comment
  CAS-BOT-BC273299  Cacaliopsis nardosmia Volney Rattan 1884-6-1 s.n. Colusa Coast Mts. North of San Francisco Bay 1524 Comment
  UCD129653  Cacaliopsis nardosmia J. M. Tucker 1959-5-30 3527 Colusa road between Goat Mountain Lookout and Upper Letts Valley (ca. 2.5 miles, airline, north of the lookout), Goat Mountain. 1447 Comment
  JEPS120964  Calandrinia breweri Lowell Ahart 2013-5-1 18659 Colusa On the N side of Hwy 20, just E of the Lake County Line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  RSA0115082  Calandrinia breweri Lowell A. Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  HSC72159  Calandrinia ciliata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9534 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  RSA783301  Calandrinia ciliata R. R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca. 10 miles N of Colusa (junction of State Hwys 45 & 20). 22 Comment
  UCD57308  Calandrinia ciliata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3679 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  SD149215  Calandrinia ciliata Hershkovitz 1991-5-3 Colusa Walker Ridge, along Walker Ridge Road near turn-off to Bear Valley on north end. Comment
  UC1101520  Callitriche marginata S. Galen Smith and G. T. Robbins 1950-4-15 1906 Colusa Bear Valley Comment
  CHSC2225  Calochortus amabilis V. Holt 1946-4-18 Colusa Cache Creek. 243 Comment
  JEPS122382  Calochortus amabilis Nisrine Machaka-Houri with Gracie Benson-Martin 2014-5-3 NG 2 Colusa Bear Valley Road Comment
  JEPS15266  Calochortus amabilis Rimo Bacigalupi 1950-4-16 3103 Colusa ridge above and n Red Bridge Camp (between and above the confluence of the North and Middle Forks of Stony Creek, very close to Glenn County line, nw Colusa County); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  CAS-BOT-BC492124  Calochortus amabilis Roxana S. Ferris 1926-4-23 6447 Colusa Grapevine grade between Stonyford and Sites Comment
  RSA0014524  Calochortus amabilis Joan Stewart 1998-6-10 759 Colusa Bear Valley Comment
  JEPS122381  Calochortus luteus Nisrine Machaka-Houri with Gracie Benson-Martin 2014-5-3 NG 1 Colusa Bear Valley Road Comment
  UCD139532  Calochortus luteus K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  UCD82117  Calochortus luteus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5645 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC491930  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  HSC103563  Calochortus luteus J. Carey, A. Hong, J. Leffingwell 1995-5-7 88 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  UCD139535  Calochortus luteus Grady L. Webster 1977-5-15 7679 Colusa Bear Creek, ca. 0.5 mile west of junction of Wilbur Springs Road and Rtw. 20. 350 Comment
  CDA15475  Calochortus splendens G. F. Hrusa, WTD 1998-6-19 14612 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC79620  Calochortus splendens G. F. Hrusa 1998-6-19 14612 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  UCD139570  Calochortus splendens K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  CHSC53987  Calochortus uniflorus Vernon H. Oswald 1991-4-21 4523 Colusa Bear Valley Rd in Bear Valley, 4.6 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. 417 Comment
  JEPS15268  Calochortus uniflorus Rimo Bacigalupi with G. T. Robbins, S. Galen Smith, and Peter Kamb 1950-4-16 3126 Colusa along Bear Creek, along road following the length of Bear Valley, at about its middle, close to BM 1326 ft, w-most Colusa County Bear Valley, Bear Creek Comment
  RSA296716  Calochortus uniflorus Thomas Wood 1979-4-14 110 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  RSA304209  Calochortus uniflorus James R. Shevock 1972-3-25 1449 Colusa Bear Valley. 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
  SEINET8197763  Calochortus uniflorus M. J. Williams 1967-5-7 1187 Colusa Bear Valley. Comment
  SEINET8369630  Calochortus uniflorus Christine C. Lorain 1993-4-20 2235 Colusa 7.1 mi s of Leesville alogn Bear Valley Road near shart 90o turn in road (cattle yard). 427 Comment
  HSC65993  Calochortus vestae D. Boyd, M. Eichelberger, Tim Messick, Tom Ranker 1980-4-20 46 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  UC1971752  Calycadenia micrantha R. L. Carr 1994-9-23 2656 Colusa Wilson Camp, SE of Stoneyford, near the Colusa/Lake county line, ca. 3 air mi SE of Goat Mountain Comment
  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
  UCD63726  Calycadenia pauciflora Craig D. Thomsen 2008-5-23 2737 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  UCD70217  Calycadenia pauciflora D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine annual grasslands in serpentine chaparral edges. 370 Comment
  CAS-BOT-BC270751  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles N of Yolo County line on Highway 16 Comment
  CAS-BOT-BC270754  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles SW of Leesville on Bartlett Springs Road 518 Comment
  RSA255613  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles southwest of Leesville on Bartlett Spr. Road 518 Comment
  SEINET10798196  Calycadenia pauciflora Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 383 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UC1876243  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mi E of Lake Co. line on Bartlett Springs Rd. 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
  UC1876262  Calycadenia pauciflora Gerald D. Carr 1971-7-23 605 Colusa 1.7 mi W of Lodoga on road to Stoneyford. 411 Comment
  UCD129835  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles north of Highway 20 on Bear Valley Road, Bear Creek. Comment
  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
  UCD129895  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles north of Yolo County line Hwy 16. Comment
  HSC86928  Calycanthus occidentalis Anthony J. Desch, Bryon Cariss 1988-4-16 34 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  UCD13380  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa 2.8 miles west of Stonyford, along Foot Springs Rd. 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
  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
  CHSC70485  Calystegia collina R. A. Schlising; T. Spira 1978-5-13 3233 Colusa Just E of Lake County line, along Hwy 20. 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
  UCD82493  Calystegia collina subsp. oxyphylla Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5682 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD84443  Calystegia collina subsp. oxyphylla Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6051 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
  UCSB4973  Calystegia occidentalis Keator, Glenn 1958-6-16 Colusa Foothills west of Bartlett Springs Comment
  UCD164158  Calystegia subacaulis Craig Thomsen 2000-4-28 2266 Colusa Between Bear Creek and Bear Valley Rd. about 0.3 mile north of junction with Hwy 20. Comment
  RSA0059884  Calystegia subacaulis Lloyd Simpson 1977-4-24 290 Colusa Along Walker Ridge Road above Barrel Springs Campground. 701 Comment
  UC71985  Camissonia contorta Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CDA38025  Camissoniopsis hirtella Vernon H. Oswald & Lowell Ahart 1998-5-7 9004 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  JEPS120912  Campanula angustiflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD165932  Campanula griffinii Ellen Dean; with Tom Starbuck 2016-4-24 8843 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  UCD66822  Campanula griffinii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Destanella Flat-Walker Ridge. 450 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
  CAS-BOT-BC37028  Capsella bursa-pastoris Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-9 32 Colusa At intersection of Rim Road with Bear Valley Road. 350 Comment
  UCD64043  Cardamine oligosperma Craig D. Thomsen 2000-3-8 2033 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
  CHSC78603  Carduus pycnocephalus J. Marr; C. Warren, J. Michaels 1998-5-4 Colusa Vicinity of Sites, Logan Ridge and Golden Gate. 76 Comment
  CHSC112228  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2013-5-1 18660 Colusa On the sides of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  JEPS120997  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2013-5-1 18660 Colusa Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  UCD159527  Carduus pycnocephalus subsp. pycnocephalus D. S. Park 2011-4-6 276 Colusa Off Rt. CA-20. Roadside. Disturbed. Comment
  CDA15499  Carex G. F. Hrusa, T. D. Wilfred 1998-6-19 14636 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  SEINET10644548  Carex Roxana S. Ferris 1917-4-17 Ferris 607 Colusa Moist earth in an oak grove. Sycamore Slough. Comment
  CDA33019  Carex angustata P. T. Zwanck 1964-4-28 Colusa 5 miles north of Colusa, on levee. 0 Comment
  JEPS80864  Carex bolanderi L. R. Heckard and J. C. Hickman 1981-7-30 5754 Colusa Trout creek, SE side of Snow Mountain 1615 Comment
  JEPS80377  Carex densa L. R. Heckard and J. Hickman 1981-6-22 5610 Colusa S side of E ridge of E Peak, Snow Mountain 1950 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
  JEPS80383  Carex hoodii L. R. Heckard and J. Hickman 1981-6-22 5616 Colusa along Dark Hollow Creek Snow Mt., Dark Hollow Creek 1889 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-BC31226  Carex lenticularis var. impressa L. R. Heckard 1972-7-8 3059 Colusa Upper reaches of Dark Hollow Creek in saddle between East and West Peaks of Snow Mt. 1981 Comment
  JEPS80861  Carex pachystachya L. R. Heckard and J. C. Hickman 1981-7-30 5741 Colusa along Trout Creek trail, se side of Snow Mt. Snow Mt., Trout Creek trail 1676 Comment
  CAS-BOT-BC118347  Carex praegracilis Roxana S. Ferris 1917-4-19 718 Colusa Marshy ground in oak grove, Sacramento River near Sycamore Slough. Comment
  UCD163311  Carex praegracilis Craig D. Thomsen 1997-4-13 1899 Colusa Bear Valley. About 6 miles north of Hwy 20. Southwest of old corral area (USGS Topo Map), where road takes a 90 degree turn to the north. Comment
  UCD63116  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4947 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 398 Comment
  UCD82620  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2889 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CAS-BOT-BC118348  Carex praegracilis Roxana S. Ferris 1917-4-17 625 Colusa Under trees, Sycamore Slough. Comment
  RSA262496  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  UCD140770  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  CHSC79853  Carex serratodens L. P. Janeway 2000-5-31 6771 Colusa High North Coast Ranges. At Trough Spring; about 8.9 km southwest of Stonyford. 1049 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
  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
  UCD67062  Carex serratodens Craig D. Thomsen 2008-3-20 2714 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 500 Comment
  JEPS74811  Castilleja affinis subsp. affinis L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-7 4019 Colusa 4.5 mi se (by road) Leesville Comment
  UCD84431  Castilleja applegatei Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  CHSC114942  Castilleja applegatei subsp. martinii Lowell Ahart 2015-4-10 20013 Colusa Road cut, on the south side of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chapararal. 500 Comment
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
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Mar 2 2015
  UCD163329  Castilleja applegatei subsp. martinii Craig D. Thomsen 2009-5-3 2797 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD81237  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5401 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 223 Comment
  JEPS73456  Castilleja applegatei subsp. pinetorum L. R. Heckard 1972-7-8 3058 Colusa Dark Hollow Creek, upper reaches, in saddle between East and West Peaks of Snow Mountain Snow Mountain 1981 Comment
  JEPS81324  Castilleja applegatei subsp. pinetorum L. R. Heckard and J. C. Hickman 1982-7-6 5939 Colusa slope 1/2 mi NE of Summit Springs (E of trail); Snow Mountain, S side 1645 Comment
  SD239905  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 (Sites 7.5'Q) 77 Comment
  UCD163675  Castilleja attenuata Craig Thomsen 1999-4-15 1976 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD56924  Castilleja attenuata Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3527 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CHSC60153  Castilleja exserta Bryan Case 1988-4-9 129 Colusa Ca. 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca 18 mi se of Williams. 321 Comment
  JEPS124238  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-1 20000 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  HSC65935  Castilleja exserta subsp. exserta C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 45 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  CHSC114943  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa On the northside of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chaparral. 500 Comment
  JEPS120991  Castilleja foliolosa Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18642 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  CHSC33156  Castilleja miniata J. D. Jokerst; Dave Isle 1980-6-27 919 Colusa Banks of Frenzel Creek. Frenzel Creek Botanical Area ca 1.0 mi S of Stoney Cr. Comment
  JEPS81325  Castilleja miniata L. R. Heckard and J. C. Hickman 1982-7-6 5940 Colusa about 0.5 mi ne Summit Springs (s side of Snow Mt, e of trail); Snow Mt. 1645 Comment
  JEPS121787  Castilleja miniata subsp. miniata David Isle 2013-8-23 2049 Colusa COLUSA County, CA. W bankSalt Ck, ~ 150' NE of Dannis Dr Bridge on Isle Property. Comment
  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
  UCD64031  Castilleja minor subsp. spiralis Craig D. Thomsen 2000-6-23 2409 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  HSC45508  Castilleja rubicundula subsp. lithospermoides M. Alcasas 1978-4-23 60 Colusa Bear Valley Rd., 4.7 mi. from Barlett Springs Rd. 457 Comment
  JEPS11154  Castilleja rubicundula subsp. lithospermoides W. L. Jepson 1938-6-9 18964 Colusa mountains between Indian Valley and Bear Valley (between Lake County and Colusa County) 579 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
  CHSC56783  Castilleja rubicundula subsp. rubicundula Peggy Brennan 1980-4-19 107 Colusa Ca 0.3 mi west of junction of Hwy 20 and Hwy 16; south side of Bear Creek, ca 18 mi southwest of Williams. 321 Comment
  JEPS124233  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2015-4-1 19987 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  RSA182037  Castilleja rubicundula subsp. rubicundula Annetta Carter, Louise Kellogg 1953-6-20 3239 Colusa Road to Leesville, 6 miles north of Wilbur Springs Junction 400 Comment
  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
  UC1745724  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1395 Colusa Bear Creek Canyon, 4.4 mi. SE of Wilbur Springs. Comment
  UC584134  Castilleja rubicundula subsp. rubicundula J. Clausen 1935-5-20 1018 Colusa ca 27 mi w Williams (past the Wilbur Springs road, along Bear Creek); Bear Creek Comment
  UCD63036  Castilleja rubicundula subsp. rubicundula Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4882 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Across Bear Creek from Cowboy Camp. 318 Comment
  RSA0121887  Caulanthus flavescens Roxana S. Ferris 1926-4-23 6405 Colusa Near Mountain House on the Williams-Stonyford Road. Comment
  CHSC35586  Caulanthus lasiophyllus J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9558 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  CHSC86876  Caulanthus lasiophyllus B. Castro 2003-3-25 1404 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 182 Comment
  UCD170130  Caulanthus lasiophyllus Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  CAS-BOT-BC48830  Ceanothus cuneatus Roxana S. Ferris 1917-4-14 572 Colusa foothills 7 mi west of Arbuckle - Rumsey Road Comment
  JEPS42087  Ceanothus cuneatus var. cuneatus W. L. Jepson 1920-5-23 8964 Colusa near Leesville; SW Colusa Co., Bear Valley Comment
  UC80064  Ceanothus cuneatus var. cuneatus T. S. Brandegee Apr 1889 701 Colusa Leesville 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
  HSC90407  Ceanothus jepsonii R. Cook, M. Lewis, L. Sims 1992-4-11 7 Colusa 1.0 mi S of Blue Oak Recreation Site on Walker Ridge Rd. 685 Comment
  HSC90415  Ceanothus jepsonii C. Wilson, P. Kittelson, M. Hardig 1992-4-11 42 Colusa Walker Ridge Rd., 1.0 mi S of Blue Oak Recreation Site 76 Comment
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Aug 18 2014
  UCD112067  Ceanothus jepsonii D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  UCD56772  Ceanothus jepsonii Sam Bledsoe 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 569 Comment
  UCD58112  Ceanothus jepsonii Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3376 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. East of Destanella. 576 Comment
  CHSC79559  Ceanothus jepsonii var. albiflorus L. P. Janeway 2000-5-31 6775 Colusa Inner North Coast Ranges. On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. 884 Comment
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD81261  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5426 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
  UCD81262  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5427 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCR225463  Ceanothus oliganthus var. sorediatus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5117 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
  HSC98207  Ceanothus oliganthus var. sorediatus Steven Lagos 1974-5-4 43 Colusa 747 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
  CHSC94524  Centaurea melitensis Lowell Ahart 2006-8-9 13169 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104358  Centaurea melitensis Lowell Ahart 2003-7-14 10387 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 Comment
  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
  JEPS110383  Centaurea solstitialis Lowell Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR206392  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14758 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC284462  Centaurea solstitialis Roxana Stinchfield 1916-7-12 474 Colusa Street - College City Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  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
  SEINET11860767  Centaurea solstitialis C. L. Abbott 1926-6-27 s.n. Colusa Colusa Comment
  UCD82577  Centaurium Craig Thomsen 2008-6-12 2767 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  JEPS80256  Centaurium muehlenbergii L. R. Heckard and J. Hickman 1980-9-15 5434 Colusa n of Summit Springs (n side of road, Lake-Colusa County boundary); Snow Mt. 1539 Comment
  CHSC107286  Centaurium tenuiflorum L. P. Janeway; B. Castro 2011-7-9 10512 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. South end of the area near the Canal fence;. upland grassland along dirt road route (into the beehive area). 51 Comment
  UCD20134  Centromadia Donald W. Kyhos 1962-8-4 62 -184 Colusa 5.4 miles east of Colusa County line on Hwy 99. Comment
  JEPS68349  Centromadia fitchii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2789 Colusa on Ladoga rd about 3 mi s Stonyford 335 Comment
  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
  UCD55450  Centromadia fitchii Ellen Dean; Gordon Harrington 2006-10-6 3275 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
  UCD63776  Centromadia parryi subsp. parryi Craig D. Thomsen 2008-5-31 2757 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  UCD66917  Centromadia parryi subsp. parryi Craig D. Thomsen; G. Harrington 2008-7-6 2784 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Near valley at the bottom of Lynch Canyon at the junction of Thompson and Lynch Creeks. Informal name for the building in the area is 'Roadkill Cafe.' Small stockpond ca. 0.2 miles to the south of Roadkill Cafe. 396 Comment
  CHSC107928  Centromadia parryi subsp. rudis B. Castro; Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Towards S end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  JEPS12580  Centromadia pungens subsp. pungens R. F. Hoover 1936-5-22 1218 Colusa Williams Comment
  CAS-BOT-BC279207  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  UC195398  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa along the state hwy near Colusa Comment
  CHSC105205  Centromadia pungens subsp. septentrionalis K. R. Stern 1980-6-1 6643 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC107943  Centromadia pungens subsp. septentrionalis B. Castro; L. Janeway 2011-4-27 1861 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. At east side of large +- saline/alkaline wetland/ marsh; in vernal depression in compacted E-W road track that goes through marsh. 49 Comment
  UC1299375  Cephalanthera austiniae Freed W. Hoffman 1948-6-27 2525 Colusa 8.6 mi. s.w. Fouts Springs (Upper Letts Valley); w. Colusa Co., Upper Letts Valley 1310 Comment
  UC931956  Cephalanthus occidentalis var. californicus Verne Grant and Alva Grant 1946-8-6 7839 Colusa near Colusa (Butte Creek bank, 1 mi n of Butte Outing Gun Club); Butte Creek Comment
  UCD81246  Cerastium glomeratum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5410 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 340 Comment
  UCD105659  Cercis occidentalis T. Tomich 1949-4-11 4 Colusa Colusa County, near Yolo County line: Cache Creek Canyon 8 miles northwest of Rumsey. (location and county information edited during georeferencing research in 2014; original label said Yolo County). Comment
  UCR206399  Cercis occidentalis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14378 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  CDA15468  Cercocarpus betuloides G. F. Hrusa, WTD 1998-6-19 14605 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. Comment
  RSA670064  Cercocarpus betuloides G. L. Webster 1989-5-6 7698 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  UCD58111  Cercocarpus betuloides Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3375 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. East of Destanella. 576 Comment
  UC1543051  Cercocarpus betuloides var. betuloides Donald G. Nelson et. al. 1940-6-8 679 Colusa several mi above Bonnie View (w boundary of Snow Mountain, Snow Mountain Trail); Snow Mountain, Snow Mountain Trail 1066 Comment
  UCR206710  Cercocarpus betuloides var. betuloides George K. Helmkamp, E. A. Helmkamp 2009-3-17 14397 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
  CHSC27634  Chaenactis glabriuscula var. heterocarpha Robert Schlising 1978-5-13 3234 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC86521  Chaenactis glabriuscula var. heterocarpha B. Castro; Beth Hendrickson 2003-3-19 1394 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 259 Comment
  JEPS120979  Chaenactis glabriuscula var. heterocarpha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18650 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
  CHSC94455  Chamaesyce maculata Lowell Ahart 2006-8-9 13170 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 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
  CHSC84965  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2003-10-23 10665 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  SBBG28500  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 564 Colusa Indian Crk, ca. 7 mi N of Leesville 289 Comment
  SBBG67773  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  UC73410  Chamaesyce serpyllifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS80052  Cheilanthes gracillima L. R. Heckard with J. Hickman 1979-6-15 5052 Colusa e trail from Frog Pond to cirque of e and w peaks Snow Mt (ne slope of West Peak ridge) 1981 Comment
  UC1415295  Cheilanthes gracillima Dale E. Johnson and J. E. Eckenwalder 1974-6-2 127 Colusa ridge connecting E and W Peaks Snow Mt 2150 Comment
  CHSC62917  Cheilanthes intertexta Vernon H. Oswald; Lowell Ahart 1994-4-6 6061 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 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
  RSA724893  Chenopodium album L. Ahart 2006-8-22 13221 -A Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UC72555  Chenopodium ambrosioides H. P. Chandler 1905-9-14 Colusa Princeton 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
  CHSC86515  Chenopodium californicum B. Castro 2003-3-18 1385 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 213 Comment
  JEPS123892  Chenopodium californicum Lowell Ahart 2015-4-28 20112 Colusa About 300 yards north of the intersection of Bear Valley Road and Brim Road, about 2 miles southwest of Leesville, about 14 1/2 miles (air) west of Williams. Comment
  UCD63033  Chenopodium californicum Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4685 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, opposite Cowboy Canyon. 312 Comment
  RSA700362  Chenopodium californicum B. Castro 2003-3-18 1385 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, in SSW-facing draw on 40 deg slope. Comment
  UCD168861  Chenopodium strictum var. glaucophyllum John Anderson 2015-1 s.n. Colusa about 0.5 mile north of Colusa Casino west of Highway 45. Comment
  UCD168862  Chenopodium strictum var. glaucophyllum John Anderson 2015-1 s.n. Colusa about 0.5 mile north of Colusa Casino west of Highway 45. Comment
  SBBG115907  Chloris gayana B. Crampton 1961-7-20 5932 Colusa ca. 2 mi S of Grimes Comment
  SEINET4565689  Chloris virgata M. J. Williams 1981-9-2 81- 162 -1 Colusa Near an almond orchard on Wisconsin Avenue, south of Arbuckle Comment
  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
  CHSC80410  Chorizanthe membranacea Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CHSC86512  Chorizanthe membranacea B. Castro 2003-3-18 1390 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  UCR138873  Chorizanthe membranacea B. Ellyson, J. Hooke, D. Newman 1996-5-5 43 Colusa Coast Range, Leesville, 9.7 mi NW of Hwy 20 on Leesville Rd.; 70 mi east of Hwy 101 on Hwy 20 445 Comment
  HSC65996  Chorizanthe membranacea D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 43 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  CAS-BOT-BC279829  Cichorium intybus Roxana Stinchfield 1916-6-18 295 Colusa Near College City Comment
  CAS-BOT-BC277955  Cirsium cymosum James Jokerst 1985-4-5 2228 Colusa Near Coyote Peak 608 Comment
  UCD82543  Cirsium cymosum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5698 a Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CDA1191  Cirsium douglasii var. breweri G. D. Barbe, Daryl Brown 1982-7-2 3892 Colusa Lower Letts Lake, Mill Valley Campground. Comment
  UC1543160  Cirsium occidentale var. venustum Charlotte Nash Smith 134 Colusa Williams, Lake Co. Road Colusa Comment
  UC71781  Citrullus colocynthis var. lanatus H. P. Chandler Oct. 1905 Colusa Princeton Comment
  UCD57861  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 46 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  UCD57862  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 49 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  CHSC83595  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate. 124 Comment
  JEPS105670  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate 124 Comment
  UCD64519  Clarkia affinis Craig D. Thomsen 2000-4-12 2121 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD104016  Clarkia affinis Grady L. Webster 1977-5-15 7682 Colusa Along Bear Creek, ca. 2 mile W of Route 20 along Wilbur Springs Road. 365 Comment
  CAS-BOT-BC164146  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  JEPS43608  Clarkia concinna subsp. concinna W. L. Jepson 1920-5-23 8973 Colusa hills between Bear Valley and Stanton Valley Comment
  UC518943  Clarkia concinna subsp. concinna David D. Keck 1933-5-30 2401 Colusa w Wilbur Springs (1 mi e of Lake County line) Comment
  UCD66707  Clarkia concinna subsp. concinna Craig D. Thomsen 2001-5-24 2503 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 2.17 and 2.25. 342 Comment
  CAS-BOT-BC164526  Clarkia gracilis subsp. albicaulis A. A. Heller 1916-6-6 12354 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  LA45424  Clarkia gracilis subsp. albicaulis G. L. Stebbins Jr.; Malcolm A. Nobs, J. A. Rattenbury 1947-4-27 3755 Colusa 3 mi. W of Leesville, on road to Bartlett Springs Comment
  CHSC89885  Clarkia gracilis subsp. gracilis B. Castro; Shirley Innecken 2001-4-27 1240 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. Adjacent to dirt road paralleling N-S-trending creek. In opening on low terrace. 332 Comment
  JEPS80137  Clarkia gracilis subsp. gracilis L. R. Heckard with J. Hickman 1980-7-2 5297 Colusa ca. 10 mi w Stonyford (just above Summit Spring entrance to Snow Mt. trail, Colusa-Lake County boundary) 1630 Comment
  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
  CDA12217  Clarkia gracilis subsp. tracyi G. F. Hrusa 1993-6-1 11165 Colusa North Coast Biodiversity Arena; Bear Valley-Bartlett Springs Rd. midway up east side of Walker ridge. Comment
  JEPS43724  Clarkia purpurea subsp. purpurea Alice King 1906-1-1 Colusa College City Comment
  UCR212340  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2201 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  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
  UC1585901  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 Colusa 2.2 mi s of Rt. M-10 (Bear Creek-Fouts Spring Rd.) (road to Goat Mt. Lookout, at head of S. Fk. Stony Creek, ca. 12 air mi wsw of Stonyford) 1500 Comment
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  UCD100591  Claytonia exigua K. Esau 1934-5-6 s.n. Colusa West of Williams, Tahoe-Ukiah Highway. Comment
  CHSC86514  Claytonia exigua subsp. exigua B. Castro 2003-3-17 1383 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  JEPS124232  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 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
  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
  UC1056274  Claytonia exigua subsp. exigua Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3186 Colusa just w Bear Valley (slope just w of base of the grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  UCSC010465  Claytonia exigua subsp. exigua Dylan M. Neubauer, Tim Forsell 2016-3-31 600 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  CAS-BOT-BC439114  Claytonia exigua subsp. exigua K. L. Chambers 1978-3-19 4423 Colusa Hwy. 20 between Williams and Clear Lake, Inner Coast Range, 15.8 mi. W of Hwy. 5 and 2.9 mi. E of junction with Hwy. 16. Comment
  JEPS86633  Claytonia exigua subsp. exigua L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6693 Colusa w of Summit Springs (near road, sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1550 Comment
  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
  UC1745697  Claytonia gypsophiloides Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1380 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  JEPS87661  Claytonia parviflora subsp. parviflora Vernon H. Oswald and Lowell Ahart 1994-4-6 6055 Colusa Goat Mtn Rd 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  UC936184  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2023 a Colusa 3 mi n Leesville; Inner North Coast Ranges 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
  UCD146599  Claytonia saxosa G. F. Hrusa 1998-6-19 14622 Colusa North Coast Ranges. Summit of Goat Mountain. 1740 Comment
  RSA114165  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Summit of Goat Mtn, Mendocino National Forest, lake - Colusa Boundary. 1865 Comment
  SFV8355  Clematis lasiantha D. Grau 1972-4-1 4 Colusa Highway 16, 5 miles south of junction with Highway 20. Comment
  CHSC94323  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
  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
  JEPS121782  Clematis ligusticifolia B. Castro 2008-7-10 1773 Colusa Sacramento Valley. Along S bank of Sacramento River, ca 5 mi N of town of Colusa, just N of Reervation Road; in undesignated Section near Colusa Rancheria. Comment
  POM149762  Clematis ligusticifolia Roxana Stinchfield 1916-7-8 388 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  RSA0037131  Clematis ligusticifolia B. Castro 2008-7-10 1773 Colusa Sacramento Valley. Along S bank of Sacramento River, ca. 5 mi N of town of Colusa, just N of Reservation Road; in undesignated Section near Colusa Rancheria. 18 Comment
  UC72761  Clematis ligusticifolia Miss M. Alice King 1905-1 Colusa along slough near College City; Sacramento Valley Comment
  SBBG27284  Collinsia bartsiifolia var. bartsiifolia E. Crum 1938-5-8 2020 Colusa 3 mi N of Leesville Comment
  UC629760  Collinsia bartsiifolia var. bartsiifolia Ethel Crum 1938-5-8 2020 Colusa 3 mi n Leesville Comment
  POM257147  Collinsia bartsiifolia var. bartsiifolia E. K. Crum 1938-5-8 2020 Colusa 3 miles north of Leesville. Comment
  UC1238969  Collinsia greenei Freed W. Hoffman 1948-6-28 2536 Colusa e side Black Diamond Mtn (near Glenn-Colusa county line); North Coast Ranges, Black Diamond Mtn 838 Comment
  UCD66690  Collinsia greenei Craig D. Thomsen 2000-5-11 2321 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
  JEPS7323  Collinsia heterophylla Alice King Apr 1906 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
  UCD57341  Collinsia sparsiflora Sergio Testa 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  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
  JEPS6657  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa 15 m w Williams (Hwy 20) Comment
  POM273490  Collinsia sparsiflora var. arvensis Lyman D. Benson 1933-4-16 4332 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  HSC44465  Collinsia sparsiflora var. collina R. York 1978-4-22 140 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 409 Comment
  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
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 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
  CHSC67606  Cordylanthus palmatus James D. Jokerst 1988-8-23 3036 Colusa Delevan National Wildlife Refuge S of Willows, in Cell 12. Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  JEPS99065  Cordylanthus palmatus Dean W. Taylor 1988-8-8 10024 Colusa Colusa National Wildlife Refuge, far southeastern corner of Ohm Rd, 1 mi n of Ware Rd 22 Comment
  NY28941  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  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
  UC2042496  Cordylanthus pilosus Holly Forbes and Barbara Keller 2009-7-1 Colusa Walker Ridge Rd about 6.2 mi. N of junction with Highway 20. Comment
  JEPS80717  Cordylanthus pilosus subsp. pilosus L. R. Heckard and J. C. Hickman 1981-7-28 5677 Colusa 3.7 km e Ladoga Bridge (w of Maxwell, along roadside) Comment
  JEPS68402  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3146 Colusa above Happy Camp (e end of Snow Mt.) 731 Comment
  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
  RSA500440  Cordylanthus pringlei Vernon H. Oswald 1989-4-12 4008 Colusa Goat Mtn Rd. 2.1 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. On the n side of Little Stony Creek. 412 Comment
  RSA505428  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123114  Cordylanthus pringlei A. M. Shapiro 1994-8-16 s.n. Colusa Letts Valley Road, Canyon of Stony Creek. 1432 Comment
  SBBG50832  Cornus glabrata J. K. Clark 1966-5-8 23 Colusa Lodoga to Stonyford Rd, 2.5 mi NW of Lodoga 320 Comment
  JEPS95819  Cornus sericea subsp. occidentalis Vernon H. Oswald and L. Ahart 1999-6-22 9777 Colusa Lily Pond near Upper Letts Lake west of Stonyford: T17N R8W Sect. 24, ca. 4080 ft, mixed coniferous forest. Twigs of a shrub ca. 3 m tall growing in wet soil along the edge of the meadow at the Lily Pond. 1243 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
  CDA10282  Cotula coronopifolia Richard R. Halse 2007-3-23 7109 Colusa Williams; by junction of 5th Street and B Street. N 39.1586 W 122.14724 Comment
  CHSC101636  Cotula coronopifolia David Isle 2006-5-5 1627 Colusa Mendocino National Forest; SW of Maxwell cardlock gas station (S of Maxwell and just W of HW 99W). S end of pre-chiseled Jack Barrett rice check #8 of 10 (counting N to S). 30 Comment
  CHSC98784  Cotula coronopifolia Richard R. Halse 2007-3-23 7109 Colusa Williams: by junction of 5th Street and B Street. 25 Comment
  UCD18850  Cotula coronopifolia Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 158 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
  CHSC29713  Cressa truxillensis K. R. Stern 1980-6-30 6649 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC61424  Croton setiger Vernon H. Oswald 1993-8-16 5805 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W1/4 of Tract 44, near the S boundary of the refuge. Field on the N side of Hunters Creek. 24 Comment
  CHSC94318  Croton setiger Lowell Ahart 2006-8-9 13103 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  RSA747233  Croton setiger George K. Helmkamp, E. A. Helmkamp 2008-10-14 14249 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  CAS-BOT-BC190085  Crypsis schoenoides Milo S. Baker 1946-9-4 11621 Colusa Butte Sink near locked Gate of Colusa Gun Club. 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
  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
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Aug 18 2014
  SEINET12765117  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford.; 0 347 Comment
  SEINET3926255  Crypsis schoenoides Barbara Ertter, Elizabeth Neese; Laura Fujii; Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga.; 0 366 Comment
  POM198510  Crypsis vaginiflora Roxana Stinchfield 1916-7-11 466 Colusa Davis Tule, near Sycamore Slough. Comment
  RSA126601  Crypsis vaginiflora H. S. Yates 1936-8-14 6136 Colusa 6 miles S. of Grimes 15 Comment
  RSA126602  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa Three miles south of Colusa. 15 Comment
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UCD66867  Crypsis vaginiflora Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5070 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UCD66926  Crypsis vaginiflora Craig D. Thomsen; G. Harrington 2008-7-6 2785 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  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
  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
  UC1177897  Cryptantha flaccida Peter M. Ray 1950-4-16 1715 Colusa junction of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  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
  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
  UCD58108  Cryptantha flaccida Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3360 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. Grassland area to the SSE of Destanella Flat. 572 Comment
  UCD58117  Cryptantha flaccida Ellen Dean; PLB 102 Class 2007-4-29 3712 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  UCR206891  Cryptantha flaccida George K. Helmkamp, E. A. Helmkamp 2009-3-11 14362 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  CHSC27589  Cryptantha hispidula Robert Schlising 1978-5-13 3231 Colusa Just E of Lake County line, along Hwy 20 on serpentine soils. Comment
  JEPS89019  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa County line, on road to Williams Comment
  UC857088  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa county on road to Williams Comment
  UCD163229  Cryptantha hispidula Craig D. Thomsen 2000-4-28 2532 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66613  Cryptantha hispidula Craig D. Thomsen 2000-5-11 2284 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82513  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2871 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82527  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2883 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC857152  Cryptantha intermedia Alice Eastwood and John Thomas Howell 1938-5-16 5629 Colusa Lake-Colusa county line on road to Williams Comment
  UCD82532  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5684 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UC638663  Cryptantha microstachys Ethel Crum 1938-5-7 2019 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UC78682  Cryptantha microstachys K. Brandegee Apr 1889 Colusa Epperson's Comment
  UC1212061  Cryptantha muricata C. R. Bell 1950-4-26 770 Colusa w of Leesville (on road to Bartlett Springs, halfway up e side of county-line ridge) Comment
  UCD84450  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6058 Colusa Walker Ridge. Along Walker Ridge Rd, E side of road in turnout. Just past Pinus attenuata groves. 981 Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  JEPS83805  Cryptantha torreyana L. R. Heckard and J. Hickman 1980-7-3 5348 Colusa ca 10 mi w Stonyford (just w of Summit Springs, sw Snow Mt, Colusa-Lake County boundary); Snow Mt. 1548 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
  CAS-BOT-BC80807  Cupressus sargentii Hugh Leech 1971-10-9 s.n. Colusa [Cook's] Cooks Springs Comment
  JEPS87788  Cupressus sargentii Vernon H. Oswald and Lowell Ahart 1994-3-23 6010 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  RSA17616  Cupressus sargentii C. B. Wolf, E. R. Johnson 1934-10-15 6189 Colusa Cooks Springs, western part of county 549 Comment
  UCD38966  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. 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
  UCD126319  Cuscuta indecora var. indecora Herbert L. Mason; Verne Grant 1946-8-6 12974 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  UCD150721  Cycladenia humilis var. humilis Susan Harrison 2011-8-8 s.n. Colusa California, Colusa County. Snow Mountain. Along trail to Summit Basin. 1920 Comment
  CHSC46872  Cycloloma atriplicifolium Vernon Oswald 1989-9-12 4009 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. 411 Comment
  CAS-BOT-BC190176  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 miles south of College City. Comment
  CHSC112020  Cynoglossum grande David Isle 1977-4-5 2069 Colusa Mendocino National Forest. About 1.3 mile NE of Fouts Springon Upper Davis Flat. 493 Comment
  JEPS73505  Cynoglossum occidentale L. R. Heckard 1972-7-10 3122 Colusa near Trout Creek crossing of trail to Box Spring; Snow Mt. 1828 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
  UC698628  Cyperus difformis P. B. Kennedy 1925-9-18 Colusa Cortena, Colusa Comment
  UCD141016  Cyperus difformis P. B. Kennedy 9-10 Aug 1921 s.n. Colusa exact location unknown. Comment
  JEPS110394  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA0051222  Cyperus eragrostis Richard Carter 2006-7-31 17124 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45. Comment
  SEINET9753686 Image available Cyperus eragrostis Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  CHSC61686  Cyperus erythrorhizos Vernon H. Oswald 1993-9-1 5891 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, E side of Cell 2, Pool 12, near the S boundary of the refuge. 22 Comment
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  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
  UC1099935  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-9-5 13115 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100519  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa 1 mi. n. Colusa (e. bank Sacramento R., below causeway over Butte Sink spillway,); Sacramento R. Comment
  UC698542  Cyperus erythrorhizos P. B. Kennedy 1925-9-8 Colusa Cortena Comment
  CAS-BOT-BC113934  Cyperus odoratus Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-9-9 1871 Colusa Rice fields 3 miles west of Williams. Comment
  POM313098  Cyperus odoratus H. L. Mason 1945-9-19 12721 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  CHSC78719  Damasonium californicum J. Marr; C. Warren, H. West 1998-7-1 Colusa Vicinity of Sites and Antelope Valley. In vernal pools N of Stone Corral Ck. 94 Comment
  UC1100151  Damasonium californicum Herbert L. Mason 1946-8-6 12959 Colusa 4 mi. s. Colusa (pond on Colusa-Marysville Hwy., w. side Sacramento R.) Comment
  POM208489  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Sacramento Valley. Comment
  RSA91938  Damasonium californicum Beecher Crampton 1953-4-29 1148 Colusa 7 miles E of Maxwell. Comment
  UC584135  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa ca. 27 mi. w. after having passed the <Wilblur> Springs rd. Williams (along Bear Creek) 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
  RSA724964  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  UCD57616  Datisca glomerata Jill Poloske; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. In bed of Thompson Creek. 304 Comment
  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
  JEPS120992  Daucus pusillus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18625 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  JEPS121115  Daucus pusillus Lowell Ahart 2013-5-1 18675 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
  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
  JEPS80869  Delphinium antoninum L. R. Heckard 1972-7-8 3051 Colusa n side of ridge running se Snow Mt.; West Peak 2011 Comment
  UC424843  Delphinium antoninum unknown 1929-7-1 3509 b Colusa between peaks Snow Mt. 2133 Comment
  UCD57667  Delphinium hesperium Erica A. Smith; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  CHSC83252  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
  UCD163308  Delphinium hesperium subsp. pallescens Craig D. Thomsen 1997-4-20 1911 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  SBBG2159  Delphinium hesperium subsp. pallescens H. and M. Dearing 1933-5-24 399 Colusa 20 mi W of Williams Comment
  HSC25000  Delphinium nudicaule M. Dole 1963-4-15 60 Colusa 7 mi. S of junction of Hwy. 16 and Hwy 20 on Hwy. 16 Comment
  RSA232955  Delphinium nudicaule D. A. Young 1969-5-4 321 Colusa 10 miles W of Wilbur Springs, along Hwy 16. 610 Comment
  POM149761  Delphinium patens Roxana S. Ferris 1917-4-14 550 Colusa 7 miles W of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC35564  Delphinium patens subsp. patens J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9567 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  UCR146707  Delphinium variegatum Roman Gankin 1958-5-4 s.n. Colusa Bear Valley 400 Comment
  UCR47948  Delphinium variegatum C. Pauls 1975-4-20 4 Colusa Bear Valley Rd., 8.7 mi north of State Hwy 20 Comment
  SEINET12086720  Delphinium variegatum L. S. Rose 1936-1 s.n. Colusa 10 mi NW of Rumsey 213 Comment
  SEINET5338169  Delphinium variegatum M. J. Williams 1967-5-7 s.n. Colusa Bear Valley. 396 Comment
  UCD14296  Delphinium variegatum G. Robinson 1984-4-21 13 Colusa Colusa Co.; Bear Valley; east of Wilbur Springs Road, 5.9 miles north of Highway 20, ca. 90 meters from road; 405 Comment
  UCD23391  Delphinium variegatum Robert E. Rolley 1977-5-8 23 Colusa Erect perennial herb, 10-30 cm tall, roots shallow and woody, leaves mostly basal, some are red edged. Leaves and stems covered by many short hairs. Flowers deep purple, upper petal white edged, spurred. Valley grassland. Dry, sunny, flat field. 9.5 miles north on Bear Valley Road from Highway 20. Comment
  UCD23392  Delphinium variegatum Patrick Fox 1977-5-8 20 Colusa Open field 9.5 miles north of Highway 20 on Bear Valley Rd. Comment
  CAS-BOT-BC16955  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-11 1210 Colusa Bear Creek Canyon Comment
  CAS-BOT-BC16958  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1926-4-23 6582 Colusa field 2 miles from Stonyford Comment
  CDA11414  Delphinium variegatum subsp. variegatum G. F. Hrusa, K. van Katwyk 1995-4-22 12135 Colusa Inner North Coast Ranges; Large colony on hillslope at E base of ridge immed. E of Bear Valley, along Leesville Road. Flowers dark purple. Common, perennial, root not detaching. Comment
  HSC96712  Delphinium variegatum subsp. variegatum Kay Izlar 2001-4-21 5 Colusa Bear Valley Rd. off Hwy. 20 415 Comment
  SEINET3927152  Deschampsia cespitosa Fred W. Hoffman 1944-7-13 1949 Colusa Between Indian and Bear valleys, western.; 0 Comment
  CAS-BOT-BC192672  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  SD27858  Deschampsia danthonioides Carl B. Wolf 1928-5-8 2127 Colusa Sacramento Valley; 3 miles south of Arbuckle 42 Comment
  UCD63907  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2163 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection (about 0.3 mile east of Hwy 20 'Vista Point'). 345 Comment
  UCD82860  Deschampsia danthonioides Gordon Harrington 2008-4-13 71 Colusa BLM Payne Ranch. Just SW of the Hwy 20-Hwy 16 intersection, SW of the corral. 324 Comment
  SEINET10909286  Deschampsia danthonioides Roland McKee 1918-5-1 McKee s.n. Colusa Princeton. Comment
  UCD62774  Deschampsia danthonioides var. gracilis A. A. Beetle 1942-5-21 3275 Colusa 12 miles north of Williams. Comment
  RSA756435  Deschampsia elongata Barbara Ertter 1989-7-1 8609 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  CHSC110819  Dicentra chrysantha David Isle; Rhonda Isle 2013-5-19 2040 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. 0.1 mi W of Maxwell Grade Summit; Burned NW asp. S of Sites Lodoga Road. 548 Comment
  UCR233440  Dichelostemma capitatum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17128 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 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
  HSC31688  Dichelostemma capitatum subsp. capitatum Bonnie Prange 1974-5-4 Colusa Near Clyde Mine 854 Comment
  HSC72165  Dichelostemma capitatum subsp. capitatum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9540 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  HSC83387  Dichelostemma capitatum subsp. capitatum Bob Wych 1975-4-20 18 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. 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
  HSC71291  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-11 4616 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  RSA367472  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1978-4-2 9532 Colusa Bear Valley Road, 3 miles from its junction with State Route 20. 366 Comment
  CAS-BOT-BC503139  Dichelostemma volubile David D. Keck 1933-5-30 2400 Colusa 1 mile east of Lake County line, west of Wilbur Springs, on south slope. Comment
  SEINET8476802  Dichelostemma volubile R. R. Halse 1989-5-7 3826 Colusa Along the Leesville Road, ca 3 miles SE of Leesville. 480 Comment
  LA8596  Digitaria sanguinalis H. S. Yates; 1936-8-14 6138 Colusa 3 mi. S of Grimes 15 Comment
  CAS-BOT-BC152171  Diplacus bolanderi A. A. Heller 1940-6-7 15720 Colusa Slope below the road on the Lodogo-Sites Road near the passing into low ground east of Lodogo Comment
  CHSC86525  Diplacus douglasii B. Castro 2003-3-18 1389 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  SEINET8235421  Diplacus layneae Unknown 1959-5-27 1338 Colusa by Cooks Creek; about 1/4 mile east of Cooks Spring. Comment
  CAS-BOT-BC208651  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  SBBG119874  Distichlis spicata L. Ahart 2003-8-15 10508 Colusa S side of St Hwy 20, ca. 1 mi SW of Williams 27 Comment
  CHSC96039  Dittrichia graveolens Robert E. Preston 2006-10-27 2411 Colusa Colusa County. 2.3 miles N of Maxwell, at on-ramp from Hwy 99 to I-5. 25 Comment
  CHSC116063  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UCD162980  Dodecatheon hendersonii Craig D. Thomsen 2002-2-7 2562 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.2 miles west of Hwy 20/16 intersection, west end of large turnout. 345 Comment
  UCR70827  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford 305 Comment
  UCD118842  Dodecatheon hendersonii subsp. hendersonii Victor Duran 1933-4-3 3378 Colusa Stonyford. 304 Comment
  CHSC107941  Downingia insignis B. Castro; Amy Lyons 2011-5-2 1880 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. At S end of a grain field, in NW end of vernally moist swale connected to a large +- saline/alkaline wetland/ marsh about 0.2 mi to the S. 49 Comment
  CHSC29750  Downingia insignis K. R. Stern 1980-6-1 6637 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS5035  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa College City Comment
  UC1192040  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa 3 mi e Maxwell Comment
  UC625519  Downingia insignis Frank W. Gould 1938-4-23 295 Colusa between Arbuckle and Williams Comment
  UCD18837  Downingia insignis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 144 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CHSC63534  Downingia ornatissima var. ornatissima Vernon H. Oswald; Joseph Silveira 1994-4-18 6110 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, on the SW side of Tract H. 21 Comment
  POM59020  Downingia pulchella A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near College City. Comment
  UCD56935  Draba verna Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3537 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  JEPS73448  Drymocallis L. R. Heckard 1972-7-8 3045 Colusa on n side of ridge running se Snow Mt. (West Peak); se of Snow Mt., West Peak 2011 Comment
  UCD81243  Drymocallis glandulosa Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5407 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  HSC45678  Dudleya cymosa Stephen Plant 1978-4-22 203 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS120799  Dysphania ambrosioides Lowell Ahart 2013-10-1 19088 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  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
  UCD32927  Echinochloa crus-galli Beecher Crampton 1965-7-8 7447 Colusa Colusa County, 2 miles south of Sycamore. Comment
  UCD34845  Echinochloa crus-galli var. crus-galli Beecher Crampton 1963-9-9 6890 Colusa 1/4 mile E of Cortena. Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. Comment
  UCD61166  Echinochloa oryzicola var. mutica P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. Comment
  UCD61169  Echinochloa oryzoides Hursh 1919-11-12 X 3342 Colusa Williams. Comment
  UCD61179  Echinochloa oryzoides Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. 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
  UCD38843  Echinodorus berteroi Beecher Crampton 1958-6-27 4983 Colusa Colusa County; five miles south of Colusa. Comment
  CAS-BOT-BC291140  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  HSC60471  Ehrendorferia chrysantha J. P. Smith 1977-4-24 9038 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD81617  Ehrendorferia chrysantha Collector Unknown 1950-6-1 s.n. Colusa Payne Range. Comment
  UCD95151  Ehrendorferia chrysantha K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  SEINET893014  Elatine ambigua June McCaskill 1954-1 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line Comment
  UCD66936  Elatine rubella Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5085 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCD49591  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-9-9 1878 Colusa Rice fields 3 miles W of Williams. Comment
  UCD49592  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-7-18 1006 Colusa West of Williams, 2.5 miles, Colusa County. Comment
  CAS-BOT-BC112754  Eleocharis macrostachya Herbert L. Mason; Verne Grant 1946-8-6 12956 -B Colusa Pond on Colusa/Marysville Hwy, 4 mi S of Colusa, W side of Sacramento River. Comment
  CHSC79049  Eleocharis macrostachya J. Marr; C. Warren, H. West 1998-7-1 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek, in vernal pool in narrow valley bottom west of ridge. 106 Comment
  POM313049  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa Rice fields 3 miles west of Williams Comment
  POM313051  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles Comment
  CHSC81936  Eleocharis parishii L. P. Janeway; B. Castro 2001-6-3 7102 Colusa Inner North Coast Ranges. At Buck Flat: east side of Walker Ridge at head of Gaither Canyon; about 1.3 km south-southeast of Baldy Mountain. 872 Comment
  JEPS102227  Eleocharis parishii L. P. Janeway and B. Castro 2001-6-3 7102 Colusa Inner North Coast Ranges. At Buck Flat: east side of Walker Ridge at head of Gaither Canyon; about 1.3 km south-southeast of Baldy Mountain. 872 Comment
  SEINET13710358  Eleocharis parishii Lowell William Ahart, Lowell William Ahart 2003-1 10382 Colusa 21 Mi. SW of Williams (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  UCD63131  Eleocharis parishii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4961 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  UCR198135  Eleocharis parishii Ellen Dean, Gordon Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3904 Colusa Payne Ranch (owned by BLM), lands to the southwest of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek, c. 1.0 mi southwest of parking lot 390 Comment
  JEPS80832  Eleocharis suksdorfiana L. R. Heckard and J. C. Hickman 1981-8-1 5804 Colusa between new Fouth Camp and High Rock (s. side of Snow Mt.); Snow Mt. 1905 Comment
  UCD82516  Elymus elymoides Craig Thomsen; G. Harrington 2009-5-12 2874 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  JEPS75852  Elymus elymoides subsp. elymoides L. R. Heckard 1974-9-10 3896 Colusa East Peak Snow Mt. (e slope) 2103 Comment
  CHSC100289  Elymus glaucus D. Isle 1988-4-13 1514 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
  CHSC91005  Elymus glaucus D. Isle 2002-6-28 177 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Below 4x4 Rd. 17N31 (Lovelady Ridge Jeep Rd.). 1060 Comment
  JEPS76125  Elymus glaucus subsp. glaucus W. L. Jepson 1938-6-11 18991 Colusa on creek 4 mi se Wilbur Springs; Bear Creek Comment
  JEPS75859  Elymus glaucus subsp. jepsonii L. R. Heckard 1974-9-10 3891 Colusa uppe reaches of creek s East Peak; Smow Mtn., Dark Hollow Creek 2011 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
  UC1051707  Emmenanthe penduliflora Helen K. Sharsmith 1953-7-1 4406 Colusa Trough Springs Ridge; Inner North Coast Ranges, Mendocino National Forest 609 Comment
  UC1609171  Emmenanthe penduliflora Vernon H. Oswald and Lowell Ahart 1993-5-27 5431 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 rd mi e of Lodoga) 481 Comment
  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
  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
  CHSC94519  Epilobium brachycarpum Lowell Ahart 2006-8-22 13218 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD105385  Epilobium brachycarpum P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  UCD55446  Epilobium brachycarpum Ellen Dean; Gordon Harrington 2006-10-6 3271 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCD82133  Epilobium brachycarpum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5663 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  JEPS75838  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-11 3954 Colusa along Summit Springs trail Snow Mt.; , Summit Springs trail 1737 Comment
  JEPS75845  Epilobium ciliatum subsp. glandulosum L. R. Heckard 1974-9-10 3912 Colusa seep-stream area on ne slope of peak Snow Mt.. West Peak 2011 Comment
  SBBG120018  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  CHSC71440  Epilobium densiflorum Vernon H. Oswald; Lowell Ahart 1998-7-15 9303 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In a meadow. 792 Comment
  JEPS75736  Epilobium densiflorum L. R. Heckard 1974-9-9 3878 Colusa about 1/4 mi e Foutch Camp 1828 Comment
  JEPS80388  Epilobium densiflorum L. R. Heckard and J. Hickman 1981-6-22 5621 Colusa big meadow along creek Snow Mt., Dark Hollow Creek 1889 Comment
  JEPS80262  Epilobium densiflorum L. R. Heckard and J. Hickman 1980-9-15 5442 Colusa n Summit Springs (n side of road, Lake-Colusa Co. boundary); Snow Mt. 1524 Comment
  CHSC79783  Epilobium foliosum L. P. Janeway; B. Castro 2000-5-4 6705 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  CHSC112253  Epilobium minutum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18649 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CDA38115  Epilobium minutum T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  CHSC32221  Epilobium nivium James Jokerst 1980-8-6 1049 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
Read comments
Dec 23 2008
  JEPS74980  Epilobium nivium L. R. Heckard 1974-9-11 3948 Colusa rocky promontory overlooking Fouts Springs (se corner of mt.); Snow Mt. 1889 Comment
  CHSC92878  Epilobium torreyi D. Isle 2005-7-10 1171 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. On W side of property; in field on Isle property just W of Salt Creek, Stonyford. In barnyard at Isle property. Comment
  JEPS80190  Epilobium torreyi L. R. Heckard and J. Hickman 1980-7-3 5341 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); southwest Snow Mt. 1548 Comment
  CDA15465  Epipactis gigantea G. F. Hrusa, WTD 1998-6-19 14602 Colusa North Coast Ranges; Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CHSC112010  Epipactis gigantea David Isle 1977-4-23 2079 Colusa Mendocino National Forest. Goat Mtn. Rd. ~1.5 miles W of jct. w/ Lodoga-Stonyford Rd (Co. Rd. 306). On N edge Little Stony Creek. Comment
  CHSC113050  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  SEINET200142 Image available Eragrostis hypnoides Herbert L. Mason 1945-9-19 12717 Colusa Below causway over Butte Sink spillway east bank of Sacramento River 1 mile above Colusa Comment
  CHSC111703  Eriastrum brandegeeae David Isle; F. Thomas Griggs 1979-5-23 2063 Colusa Little Stony Creek Watershed. 1/2 mile W of Lodoga Rd/Goat Mtn. Rd junction, off S side Goat Mtn. Rd (off both sides within 6 feet of rd.). 402 Comment
  CAS-BOT-BC515192  Eriastrum tracyi Volney Rattan 1881-6-1 s.n. Colusa Stony Creek. Coast Mountains north of San Francisco Bay Comment
  JEPS80277  Ericameria greenei L. R. Heckard and J. Hickman 1980-9-16 5463 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  JEPS83809  Ericameria greenei L. R. Heckard and J. Hickman 1980-9-16 5463 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  CHSC89854  Ericameria linearifolia B. Castro; L. P. Janeway 2001-4-18 1238 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On edges of low terrace just above riparian corridor paralleling dirt road, adjacent to perennial N-S-trending creek. 268 Comment
  JEPS95505  Ericameria linearifolia Vernon H. Oswald and L. Ahart 1994-3-23 6019 Colusa just W of the bridge over Sullivan Creek, S of Stonyford; Goat Mtn. Rd; 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
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  JEPS75738  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-10 3899 Colusa e slope East Peak; Snow Mt., East Peak 2103 Comment
  CAS-BOT-BC295954  Erigeron philadelphicus Roxana S. Ferris 1917-4-15 611 Colusa Sycamore Slough Comment
  CHSC77302  Erigeron sumatrensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CAS-BOT-BC216001  Eriodictyon californicum Roxana S. Ferris 1917-4-14 597 Colusa 5 miles west of Arbuckle, Arbuckle-Rumsey Road Comment
  UC2042511  Eriodictyon californicum Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 4.4 miles N from its intersection with Highway 20. Comment
  UC624291  Eriodictyon californicum L. Constance 1939-5-14 2488 Colusa 2.5 mi e of Bonnie View (above Middle Fork of Stony Creek, Inner North Coast Ranges); Inner North Coast Ranges 518 Comment
  UC71629  Eriodictyon californicum Miss Alice King 1905-1 Colusa College City 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
  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
  RSA216788  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Creek canyon N. of Highway 20 (near Wilbur Springs) Comment
  UC1552830  Eriogonum dasyanthemum Frederica Bowcutt 1985-5-5 509 Colusa ca. 1 mi nw Wilbur Springs Comment
  UCD63122  Eriogonum dasyanthemum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4952 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  UCR212378  Eriogonum dasyanthemum Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4677 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek 513 Comment
  UCR263625  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  UC1299724  Eriogonum dasyanthemum Freed W. Hoffman 1947-6-19 1654 Colusa near Wilbur Springs Comment
  UCR88380  Eriogonum luteolum var. luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 Comment
  CAS-BOT-BC270982  Eriogonum nervulosum G. L. Stebbins 1966-6-6 6433 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stonyford 609 Comment
  JEPS15558  Eriogonum nervulosum G. Thomas Robbins with L. R. Heckard 1956-7-25 3723 Colusa 1/4 mi s summit Snow Mt. West (ridge forming s extension of Snow Mt. West); Snow Mt. West, Lake-Colusa County Boundary 2103 Comment
  UC1520695  Eriogonum nervulosum R. Raiche 1985-7-27 50667 Colusa Goat Mt. Rd. area Frenzel Creek (headwaters of creek, w of Lodoga) 707 Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  UCD100642  Eriogonum nudum var. nudum Arthur M. Shapiro 1988-8-24 s.n. Colusa near Glenn County Line, at Goat Mountain Lookout, just below summit of Goat Mountain. In Mendocino National Forest. 1865 Comment
  CAS-BOT-BC269821  Eriogonum nudum var. pubiflorum Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5031 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
  IRVC29687  Eriogonum nudum var. pubiflorum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5031 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
  RSA133246  Eriogonum spergulinum var. reddingianum Peter H. Raven, Richard Snow 1959-9-11 14419 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  CHSC32219  Eriogonum umbellatum var. smallianum James Jokerst 1980-8-6 1054 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  UCR261723  Eriogonum umbellatum var. smallianum Ann Howald 2003-5-30 2357 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  UCD163314  Eriogonum wrightii Craig D. Thomsen 1997-4-13 1903 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  HSC39241  Eriophyllum lanatum J. P. Smith, Thomas W. Nelson 1976-4-14 8578 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  POM174581  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6453 Colusa Stonyford. Comment
  UC195369  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa on grade about 3 mi w Leesville; Coast Range Comment
  CAS-BOT-BC308096  Eriophyllum lanatum var. achilleoides Ella D. Cantelow 1957-5-31 s.n. Colusa West edge of Bear Valley along road to Bartlett Springs Comment
  CAS-BOT-BC308100  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6445 Colusa Near top of Grapevine Grade between Stonyford and Sites Comment
  UCD70239  Eriophyllum lanatum var. arachnoideum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 Comment
  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
  UCD57557  Erodium cicutarium Cindy Yip; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  UCD82123  Erodium cicutarium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5651 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR238747  Erodium moschatum George K. Helmkamp, E. A. Helmkamp 2012-2-9 18536 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC211071  Eryngium Roxana Stinchfield 1916-6-18 309 Colusa R.R. embankment near College City Comment
  CHSC84964  Eryngium aristulatum Lowell Ahart 2003-10-23 10662 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  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
  UC727670  Eryngium castrense Milo S. Baker 1946-9-4 11611 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CDA38319  Eryngium castrense Kingwell 1930-5-2 s.n. Colusa [no additional data] 0 Comment
  CDA21063  Erysimum capitatum G. F. Hrusa 1993-5-2 10856 Colusa North Coast Ranges; Frenzel Creek Research Natural Area, Mendocino National Forest. Mouth of Frenzel Creek, tributary of Little Stony Creek. 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-BC40754  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. Comment
  CDA34089  Erysimum capitatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC71302  Erysimum capitatum var. capitatum Thomas W. Nelson, Jane P. Nelson 1979-4-12 4624 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS86638  Erysimum capitatum var. capitatum L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6684 Colusa along trail from Frog Pond to East Peak; Snow Mtn. 1875 Comment
  UCD81855  Erysimum capitatum var. capitatum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5739 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  RSA590193  Erysimum capitatum var. capitatum Michael A. Vincent, Robert M. Rhode 1996-3-30 7287 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  JEPS120998  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CAS-BOT-BC402661  Eschscholzia caespitosa Mrs. H. C. Cantelow 1936-4-11 s.n. Colusa Bear Creek Canyon Comment
  CHSC100950  Eschscholzia caespitosa Rodney Lacey 2008-4-1 Colusa Inner North Coast Ranges. Little Stony Creek; on private dirt road adjacent to Goat Mountain Road, near Lodoga-Stonyford Road, approximately 3.2 km west of Lodoga. 398 Comment
  UCR233450  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17124 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UC630427  Eschscholzia californica Annetta Carter 1938-5-8 1392 Colusa 5.5 mi s Leesville (on Wilbur Springs rd); Inner North Coast Range, Bear Valley 426 Comment
  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
  CAS-BOT-BC402977  Eschscholzia californica A. A. Heller 1919-5-10 13115 Colusa Valley west of Leesville Comment
  CAS-BOT-BC402978  Eschscholzia californica Roxana S. Ferris 1917-4-14 603 Colusa 3 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC5885  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  HSC48045  Eschscholzia lobbii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3937 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UC71635  Eschscholzia lobbii Miss Alice King 1905-1 Colusa College City Comment
  UCR206870  Eucalyptus camaldulensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14319 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  CHSC9537  Euphorbia crenulata L. V. Ritter 1969-4-30 219 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. Comment
  JEPS94798  Euphorbia spathulata Vernon Oswald and Lowell Ahart 1998-5-7 9002 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
  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
  CDA35306  Euphorbia spathulata Vernon H. Oswald & Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  CHSC61769  Euthamia occidentalis Vernon H. Oswald 1993-9-1 5889 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N side of Hunters Creek in Tract 44, near the S boundary of the refuge. 22 Comment
  CHSC117784  Euthamia occidentalis David Isle; Terril Wolt 2016-6-16 2167 Colusa North Coast Range:~3/4 mile NE of Fouts Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  UCD81895  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
  JEPS81290  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5902 Colusa s of Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  JEPS80395  Festuca rubra L. R. Heckard and J. Hickman 1981-6-22 5628 Colusa s of Dark Hollow Trail; Snow Mt. 1981 Comment
  CAS-BOT-BC77677  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCR227906  Forestiera pubescens Ellen Dean, J. Alderson, N. Voegtly, Craig D. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the Southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 253 Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  CAS-BOT-BC223843  Frankenia palmeri Roxana Stinchfield 1916-7-11 450 Colusa Colusa - Williams Road the trough Comment
  UC931959  Frankenia salina Verne Grant and Alva Grant 1946-8-6 7841 Colusa near Colusa (Butte Outing Gun Club) 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
  CHSC36175  Fraxinus dipetala Robert A. Schlising 1978-4-10 3218 Colusa Grapevine Pass, on Sites--Lodoga Road. 562 Comment
  UCD67670  Fraxinus dipetala D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  UC1178025  Fraxinus latifolia Herbert L. Mason 1947-3-29 13156 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Creek Comment
  UC1613366  Fritillaria Charles M. Belshaw April 1937 2863 Colusa vicinity of Cook's Spring (Devil's Ridge); Devil's Ridge Comment
  UCSC010485  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  CAS-BOT-BC130330  Fritillaria glauca Greg de Nevers; S. Charnley 1995-5-27 10734 Colusa Snow Mountain 2133 Comment
  CAS-BOT-BC130339  Fritillaria glauca Donald V. Hemphill 1956-5-26 s.n. Colusa 1/4 mi. south of Snow Mt. East 2103 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
  UCR261601  Fritillaria pluriflora Ann Howald 2003-3-26 2293 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.5 miles north of Lodoga, c. 0.2 mi south of Chisolm Cove Group Campground 373 Comment
  UCR261613  Fritillaria pluriflora Ann Howald 2003-3-12 2279 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2 miles southeast of Stonyford 379 Comment
  UCR261676  Fritillaria pluriflora Ann Howald 2003-3-25 2283 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 1.5 miles southeast of Stonyford, just south of cattle guard at entrance to recreation area 364 Comment
  SEINET8478939  Fritillaria pluriflora W. Roderick 1967-3-20 s.n. Colusa Bear Valley. Comment
  UCSC010484  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
  HSC62800  Fritillaria purdyi Michelle Stevens 1979-4-14 32 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
  JEPS80799  Galium andrewsii subsp. andrewsii L. R. Heckard and J. C. Hickman 1981-7-30 5769 Colusa about 100 ft above on n side Trout Creek (se side of mt); Snow Mt. 1554 Comment
  JEPS52810  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4357 Colusa 2.7 mi by road ne Lodoga (s-facing roadbank) 396 Comment
  HSC45711  Galium aparine Sheila Logan 1978-4-22 85 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80392  Galium aparine L. R. Heckard and J. Hickman 1981-6-22 5625 Colusa Dark Hollow Trail Snow Mt. 1965 Comment
  JEPS80054  Galium bifolium L. R. Heckard with J. Hickman 1979-6-15 5054 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  JEPS75849  Galium grayanum var. nanum L. R. Heckard 1974-9-10 3898 Colusa top of East Peak Snow Mt.; , top of East Peak 2133 Comment
  JEPS88931  Galium grayanum var. nanum Milo S. Baker 1929-7-1 3516 b Colusa near top Snow Mt. Comment
  JEPS80877  Galium parisiense L. R. Heckard and J. C. Hickman 1980-7-3 5364 A Colusa slopes about Summit Springs (sw slope of mt); Snow Mt. 1554 Comment
  UCR212309  Galium parisiense Craig D. Thomsen 2000-3-31 2080 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS23255  Galium sparsiflorum subsp. glabrius Francia Chisaki, Gene B. Newcomb 1958-6-19 1166 A Colusa John Smith Road (Goat Mt.-Stonyford Road) Comment
  CAS-BOT-BC199032  Garrya congdonii Milo S. Baker 1947-4-6 11645 Colusa Along Hwy. 20 just E of the Lake-Colusa boundary. Comment
  CDA12373  Garrya congdonii G. F. Hrusa 1996-1-2 12626 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  CDA12797  Garrya congdonii G. F. Hrusa 1996-2-26 12632 Colusa Serpentine Flora of California; above Little Stony Creek, on Goat Mtn.Rd. approx. 2.5 miles SE of Stonyford-Lodoga Rd. Comment
  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
  UCD121091  Garrya congdonii G. F. Hrusa 1996-2-26 12632 Colusa Above Little Stony Creek, on Goat Mtn. Rd. approx 2.5 miles SE of Stonyford-Lodoga Rd. Inner North Coast Ranges. 475 Comment
  UCD121092  Garrya congdonii G. Jones 1934-2-11 s.n. Colusa Above Williams. Comment
  UCD121094  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
  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
  UCD66545  Gastridium phleoides Beecher Crampton 1958-5-19 4796 Colusa 10.1 miles southeast of Leesville. Comment
  UCD57289  Geranium molle Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3660 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 322 Comment
  UCD63100  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4931 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  CDA15474  Gilia capitata subsp. mediomontana G. F. Hrusa, WTD 1998-6-19 14611 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  CHSC87237  Gilia clivorum B. Castro; Beth Hendrickson 2003-3-24 1399 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 310 Comment
  POM282251  Gilia tricolor Lyman Benson 1929-3-26 1043 Colusa Wilbur Springs Comment
  RSA293157  Gilia tricolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9563 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UCD14374  Gilia tricolor L. Coats 1983-4-24 11 Colusa Colusa Co.; in the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road; 487 Comment
  JEPS121110  Gilia tricolor subsp. diffusa Lowell Ahart 2013-5-1 18684 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
  UC719300  Gilia tricolor subsp. tricolor F. G. Meyer 1938-4-5 1356 Colusa about 10 mi w Williams; w of Williams Comment
  UC1614401  Githopsis Charles M. Belshaw 1937-4-25 2835 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  CHSC113040  Glinus lotoides Lowell Ahart 2013-10-1 19074 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UC1191378  Glinus lotoides Herbert L. Mason 1945-7-11 12641 Colusa 3 mi above Colusa (near Butte Creek, Butte Lodge Outing Club); Butte Lodge Outing Club 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
  UCD66923  Glinus lotoides Craig D. Thomsen; G. Harrington 2008-7-6 2775 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek canyon. Along ridge trail. 510 Comment
  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
  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
  UCD63039  Glycyrrhiza lepidota Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4885 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow close to Bear Creek in uplands. 376 Comment
  UCD72477  Glycyrrhiza lepidota Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3811 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  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
  SEINET7042569  Gnaphalium canescens A. G. Vestal 1938-9-1 s.n. Colusa Along top of trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  RSA725016  Gnaphalium luteoalbum L. Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC303890  Gnaphalium palustre Roxana Stinchfield 1916-7-9 409 Colusa Phillips Ranch Comment
  JEPS75841  Gnaphalium palustre L. R. Heckard 1974-9-10 3915 Colusa ne slope of West Peak (Snow Mt., along dry creek bed near seep area); Snow Mt., West Peak 2011 Comment
  POM53851  Gnaphalium palustre Roxana Stinchfield 1916-6-17 289 Colusa At Tule levee, College City. Comment
  CHSC115626  Gnaphalium palustre David Isle; Rhonda Isle 2014-9-27 2144 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
  CDA6134  Grindelia camporum var. camporum M. S. Bergseng 1959-5-8 2343 Colusa Arbuckle. 0 Comment
  CAS-BOT-BC305305  Grindelia hirsutula Roxana Stinchfield 1916-6-17 283 Colusa College City Comment
  JEPS113894  Grindelia hirsutula L. P. Janeway 2007-6-17 9058 Colusa Inner North Coast Ranges; Along Bartlett Springs Road between Bear Valley and Walker Ridge Road. 530 Comment
  CHSC97317  Grindelia hirsutula var. davyi L. P. Janeway 2007-6-17 9058 Colusa Inner North Coast Ranges. Along Bartlett Springs Road between Bear Valley and Walker Ridge Road. 530 Comment
  CHSC86780  Hainardia cylindrica 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
  UCD37194  Hainardia cylindrica Beecher Crampton 1958-5-19 4825 Colusa Colusa County, 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  JEPS94768  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  UCD159338  Harmonia hallii D. S. Park; E. Dean 2010-6-5 122 Colusa Walker ridge, Cold Spring Mt. Abundant by road. 692 Comment
  UCD82590  Harmonia hallii Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2735 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  JEPS83144  Hazardia whitneyi var. discoidea L. R. Heckard and J. Hickman 1980-9-16 5462 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  UCD82440  Helenium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 a Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  CHSC106249  Helenium bigelovii B. Castro; L. P. Janeway 2001-6-3 1258 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. 882 Comment
  CAS-BOT-BC306371  Helenium bigelovii Volney Rattan 1877-6-26 s.n. Colusa Sulphur Cr. Comment
  UCD70304  Helenium puberulum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  CDA15546  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1/2 mi. from Lodoga/Stonyford Rd. Comment
  CHSC94313  Helianthus bolanderi Lowell Ahart 2006-8-9 13097 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110413  Helianthus bolanderi Lowell Ahart 2006-8-9 13097 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  JEPS30444  Helianthus bolanderi Peter H. Raven and R. Snow 1959-9-11 14424 Colusa about 2 mi se Happy Camp 762 Comment
  UCD144347  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon. Approximately 1/2 mile from Lodoga/Stonyford Road. 400 Comment
  UC1552825  Heliotropium curassavicum Frederica Bowcutt 1985-5-20 527 Colusa 10 air miles w. Williams (n.e. of Wilbur Springs ca. 7 mi., along Hwy. 20 and Salt Creek) Comment
  UCD70229  Heliotropium curassavicum var. oculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual plant communities on serpentine temporal vernal pools. 370 Comment
  CDA20053  Heliotropium europaeum D. Brown 2002-10-4 PDR 019525 Colusa Northern California; Vicinity of Colusa 0 Comment
  UCD133062  Hemizonella minima J. M. Tucker 1951-6-28 3520 Colusa near the road, and in the vicinity of a house, around 2 miles (by road) below the summit of Goat Mountain (around 1.25 miles, airline, north-northwest of Goat Mountain Lookout). 1645 Comment
  UC1563854  Hemizonia clevelandii Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8876 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  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
  CHSC77309  Hemizonia congesta subsp. luzulifolia Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  UC73977  Hemizonia congesta subsp. luzulifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD160070  Hemizonia congesta subsp. luzulifolia Ellen Dean; Craig Thomsen and Davis Botanical Society 2015-4-25 8629 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Lynch Canyon near 'Bullfrog Pond. 384 Comment
  UCD61435  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3880 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCD66458  Hemizonia congesta subsp. luzulifolia Craig D. Thomsen 2000-6-7 2363 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
  UCR281726  Hemizonia congesta subsp. tracyi David Isle, Frank Pendell 2014-6-16 2136 Colusa North Coast Range, c. 2 miles west of Stonyford on the Pendell Ranch, southeast of the home of Frank and Sheri Pendell c. 0.25 mile and northwest of the Stonyford Cemetary, c. 200 yards 384 Comment
  SEINET10758258  Hemizonia parryi subsp. parryi Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 909 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W, near edge between sections 4 and 5. 499 Comment
  POM56197  Hemizonia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa. Comment
  JEPS75707  Heracleum lanatum Alice Q. Howard 1972-7-10 10 Colusa stream crossing trail between Fouts Camp and Box Springs (lower of 2 wet places along trail on n. side of ridge separating Trout & Paradise Creeks, Snow Mt.); Snow Mt. 1600 Comment
  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
  CHSC79460  Hesperevax acaulis var. acaulis B. Castro; L. P. Janeway 2000-5-2 1107 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 237 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
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  UCD110497  Hesperolinon californicum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD57715  Hesperolinon californicum Daniel Chau; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  UCR200666  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch, southwest of intersection between Hwy 16 and Hwy 20, Cowboy Camp farea on the west side of Hwy 16, 1 mile south of Hwy 20, 0.25 mi. west of public viewing area and Bear Creek Comment
  CDA28487  Hesperolinon californicum T. C. Fuller 1958-5-27 3686 Colusa Highway 20, 0.7 mile west of junction with Hwy 16. 0 Comment
  SD51765  Hesperolinon congestum Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cooks Springs. 548 Comment
Read comments
Jul 18 2010
  CHSC112217  Hesperolinon disjunctum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18635 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
  UC1088845 Image available Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca. 1 mi above Diversion Dam of Big Stoney Creek (near road from Stoneyford to Fouts Springs); Mendocino National Forest; Mendocino National Forest, Colusa Co. 518 Comment
  UC1212480  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-17 4250 Colusa above Wide Awake Mercury Mine (abandoned) (above Wilbur Springs (3 mi w of State Hwy 20)); Inner North Coast Ranges Comment
  UC1212487  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca one mi above Diversion Dam of Big Stony Creek (near road from Stoneyford to Fouts Springs); Inner North Coast Ranges, Mendocino National Forest; above Diversion Dam of Big Stoney Creek, Mendocino National Forest, Colusa Co. 518 Comment
  UCD82139  Hesperolinon disjunctum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5679 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
  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
  HSC103533  Hesperolinon disjunctum Thomas W. Nelson, Jane Nelson 1986-5-25 8093 Colusa Along Forest Service Rd. 18N03, just west of Fouts Spring Campground 152 Comment
  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
  CHSC111651  Hesperolinon drymarioides David Isle; Niall McCarten, Roxanne Bittman 1987-5-26 2062 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. On N slope openings in serpentine chaparral N of Cook Springs (at end of rd). 463 Comment
  SD8554  Hesperolinon drymarioides Katherine Curran Aug 1884 Colusa Epperson's Comment
  UC1509752  Hesperolinon drymarioides C. M. Rogers 1969-6-21 13265 Colusa near Cooks Springs Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  JEPS108816  Heterocodon rariflorum Lowell Ahart 2006-6-11 12678 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
  CDA16130  Heteromeles arbutifolia G. F. Hrusa 1999-2-13 14913 Colusa North Coast Ranges; Along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  HSC87080  Heteromeles arbutifolia Anthony J. Desch, Bryon Cariss 1988-4-16 35 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  RSA688943  Heteromeles arbutifolia Dana York 1998-12-6 2259 Colusa 35 km NE of Fresno, 3.3 km SSW of Tollhouse, along Dry Creek. 500 Comment
  SEINET6710046  Heteromeles arbutifolia var. macrocarpa R. R. Halse 2012-3-29 8458 Colusa Along State HWY 20, just east of the Lake County Line about 14.6 miles east of the junction with State HWY 558 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
  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
  UCD85417  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CAS-BOT-BC284988  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  CHSC112265  Hordeum depressum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18637 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
  JEPS120993  Hordeum depressum Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18637 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  CHSC80502  Hordeum marinum subsp. gussoneanum Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  JEPS118652  Hordeum marinum subsp. gussoneanum L. P. Janeway, B. Castro 2011-4-27 10243 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Comment
  UCD163712  Hordeum marinum subsp. gussoneanum Craig Thomsen 1999-5-10 2023 b Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD163872  Hordeum marinum subsp. gussoneanum Craig D. Thomsen 2000-3-31 2173 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  CHSC111692  Hordeum marinum subsp. gussoneanum David Isle; Rhonda Isle, Justin Isle 1988-5-22 2099 Colusa Middle Fork Stony Creek Watershed. Field S of Pendell home, S of Fouts Springs Rd 18N01 (M1)), 2 miles W of Co. Rd. 306 jct. w/Fouts Springs Road. 384 Comment
  CHSC83698  Hordeum murinum subsp. leporinum L. P. Janeway 2002-4-24 7521 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  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
  UCD86536  Hordeum vulgare Beecher Crampton 1962-4-17 6216 Colusa Sycamore. Comment
  JEPS80817  Horkelia californica subsp. dissita L. R. Heckard and J. C. Hickman 1981-7-31 5789 a Colusa e side Snow Mt. (Dry meadow at Box Spring); Box Spring 1402 Comment
  JEPS80063  Hydrophyllum occidentale L. R. Heckard and J. Hickman 1979-6-15 5069 Colusa saddle between e and w peaks Snow Mt. 2103 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
  JEPS80831  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1981-8-1 5803 Colusa s. side Snow Mt. (lower Foutch Camp Meadow) 1844 Comment
  UCD110369  Hypericum perforatum subsp. perforatum Jack Booth 1973-6-14 s.n. Colusa State Highway 20, 2 miles west of junction with State Highway 16. Comment
  HSC48199  Hypochaeris glabra Thomas W. Nelson, Jane P. Nelson 1978-4-29 3957 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  RSA730240  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
  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
  JEPS81321  Iris fernaldii L. R. Heckard and J. C. Hickman 1982-7-6 5936 Colusa wilderness area above Summit Springs (s side of Snow Mt, near entrance and parking to Snow Mt); Snow Mt. 1584 Comment
  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
  UCD57305  Iva axillaris Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3676 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
  JEPS80386  Juncus L. R. Heckard, and J. Hickman 1981-6-22 5619 Colusa Dark Hollow Creek Snow Mt. 1889 Comment
  CHSC107173  Juncus balticus subsp. ater L. P. Janeway; B. Castro 2011-5-19 10284 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Eastern of the 2 Juncus patches at the south edge of the marsh, just above high water line. 50 Comment
  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
  CHSC94468  Juncus bufonius var. bufonius Lowell Ahart 2006-8-9 13144 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  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
  JEPS80246  Juncus effusus subsp. pacificus L. R. Heckard and J. Hickman 1980-9-15 5424 Colusa w of Summit Springs; Snow Mt. 1554 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
  JEPS73494  Juncus laccatus L. R. Heckard 1972-7-10 3107 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  JEPS80269  Juncus occidentalis L. R. Heckard, and J. Hickman 1980-9-16 5452 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area, Snow Mt.); Snow Mt. 1981 Comment
  CHSC88579  Juncus oxymeris L. P. Janeway 2001-6-6 7115 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  CHSC107172  Juncus xiphioides L. P. Janeway; B. Castro 2011-5-19 10289 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. In and adjacent to a shallow swale that drains north into the marsh which is 3 m lower in elevation. 52 Comment
  CHSC43541  Juniperus californica Lowell Ahart 1976-2-14 1005 Colusa About 3 miles west of Sites. 365 Comment
  UCD63029  Juniperus californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4681 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. 501 Comment
  UCD70298  Juniperus californica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Open California juniper woodland (Juniperus californica). 420 Comment
  JEPS73509  Keckiella corymbosa L. R. Heckard 1972-7-10 3127 Colusa 3 mi nw and overlooking Fouts Springs (se corner of Snow Mt); Snow Mt. 1828 Comment
  RSA718197  Keckiella corymbosa L. Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 422 Comment
  UCD72528  Koeleria macrantha Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3819 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek along trail that begins approximately opposite the BLM parking lot near south end of bridge. Approx. 0.75 mile along trail. 286 Comment
  RSA746963  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2008-10-14 14244 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UCR205140  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2008-10-14 14244 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  RSA0011766  Lagophylla dichotoma Ethel Crum 1938-5-8 2033 Colusa Inner North Coast Range, 3 miles N of Leesville. Comment
  CHSC27635  Lagophylla minor Timothy Spira; Robert Schlising 1978-5-13 3240 Colusa Just E of Lake County line, along Hwy 20. 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
  UCD57827  Lagophylla minor Gordon Harrington 2007-4-17 36 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 567 Comment
  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
  CAS-BOT-BC341470  Lagophylla ramosissima L. R. Abrams 1928-5-8 12586 Colusa 2 miles south of Arbuckle Comment
  UCR206691  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-1-31 14323 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  CAS-BOT-BC290604  Lasthenia Peter Rubtzoff 1978-5-14 9167 Colusa Bear Valley Road, ca. 4-5 miles south of junction of the road to Fort Ross State Historic Park. Bartlett Springs Road. Comment
  RSA0034036  Lasthenia Peter Rubtzoff 1978-5-14 9167 Colusa Bear Valley Road, ca. 4-5 miles south of junction of the road to Fort Ross State Historic Park. Bartlett Springs Road. Comment
  CHSC77915  Lasthenia californica Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  CAS-BOT-BC337916  Lasthenia californica Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 46 Colusa Along Bear Valley Rd., 1.2 miles west of the junction with Brim Rd. 414 Comment
  UCD23380  Lasthenia californica subsp. californica George C. Ziobro 1978-4-8 2 Colusa collected off of Bear Valley Road 10.3 miles north of the junction with State Route 20. 396 Comment
  CAS-BOT-BC353481  Lasthenia fremontii Roxana S. Ferris 1917-4-12 531 Colusa 4 miles E of Williams Comment
  CHSC28855  Lasthenia fremontii Joann Lacey 1979-3-31 11 Colusa Ca. 1 mi w of Williams, n side of Hwy 20. 25 Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites 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
  UCD163703  Lasthenia glabrata Craig Thomsen 1999-5-10 2015 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD64046  Lasthenia glabrata subsp. glabrata Craig D. Thomsen 2000-3-31 2046 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UC71630  Lasthenia gracilis Miss Alice King 1905-1-1 Colusa College City Comment
  UC90075  Lasthenia gracilis K. C. Brandegee May 1883 Colusa Sulphur Creek Comment
  UCD163909  Lasthenia gracilis Sara Martin 2016-4-9 2 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just southwest of corral at junction of 16 and 20. 323 Comment
  UCD64253  Lasthenia gracilis Craig D. Thomsen 2000-3-31 2054 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82464  Lasthenia gracilis Craig Thomsen; G. Harrington 2009-5-12 2841 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  JEPS80130  Lathyrus brownii L. R. Heckard with J. Hickman 1980-7-1 5289 Colusa 10 mi w of Stonyford (Trail from Summit Springs to Frog Lake, Snow Mountain); Snow Mountain 1767 Comment
  JEPS80788  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1981-7-30 5761 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1584 Comment
  UCD80896  Lathyrus vestitus Ellen Dean; G. Harrington 2009-3-27 5296 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Along road that connects Lynch Canyon and the Ridge Trail on slope above road. 453 Comment
  HSC103356  Lathyrus vestitus var. vestitus Thomas W. Nelson, Jane Nelson 1981-4-16 6419 Colusa Along Bartlet Springs-Bear Valley Rd., ~ 100 yds. from Bear Valley 610 Comment
  CAS-BOT-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
  CDA12014  Layia chrysanthemoides G. F. Hrusa 1990-4-8 7666 Colusa North Coast Biodiversity Arena; S end of Bear Valley, Comment
  HSC87057  Layia chrysanthemoides Pat Daly, Rudy Galindo 1988-4-17 61 Colusa 5.2 mi. S on Bear Valley Rd. 390 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
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  UCR212376  Layia chrysanthemoides Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4663 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  HSC95341  Layia chrysanthemoides A. Hove, A. Poteet, C. Sanville 1999-5-1 40 Colusa Bear Bear Valley Rd., 2 km S of Brim Rd. 415 Comment
  UCD133958  Layia chrysanthemoides J. M. Tucker; Dorothy Dreyfus 1967-4-29 4035 Colusa at south end of Bear Valley. 6.3 miles north of junction of Bear Valley Road with State Highway 20. 426 Comment
  UCD133896  Layia gaillardioides E. Jacqueline Garcia 1986-4-13 s.n. Colusa Bear Valley. 390 Comment
  HSC96795  Layia platyglossa J. Carey, A. Hong, J. Leffingwell 1995-4-1 31 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CAS-BOT-BC380897  Layia platyglossa Ethel Crum 1936-5-8 2036 Colusa Bear Valley 4 miles south of Leesville 426 Comment
  CAS-BOT-BC380898  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CDA8151  Layia platyglossa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD135674  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  UCD82338  Layia platyglossa Robin McMaster 1973-4-15 324 Colusa 100 yd from junction of Hwys 16 and 25, next to Bear Valley Creek. Comment
  CHSC62838  Layia septentrionalis Vernon H. Oswald; Lowell Ahart 1994-3-23 6020 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Between the road and Little Stony Creek. 505 Comment
  JEPS95624  Layia septentrionalis Vernon H. Oswald and L. Ahart 1994-3-23 6020 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  UCR261647  Layia septentrionalis Ann Howald 2003-4-23 2309 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  UCR261678  Layia septentrionalis Ann Howald 2003-4-24 2315 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, west side Little Stony Creek, opposite the dam 350 Comment
  CAS-BOT-BC274325  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile above Colusa Comment
  UC1100313  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank of Sacramento River, Butte Sink); Sacramento River, Butte Sink Comment
  CHSC116673  Lemna minuta Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20723 Colusa Small pond on the east side of the graveel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  CHSC49694  Lemna minuta Vernon Oswald 1984-7-20 1623 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. In a pool where meadow drains beneath road. 1280 Comment
  JEPS127105  Lemna minuta Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20723 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  UC1107309  Lemna trisulca J. M. Tucker and L. K. Mann and John Tothill 1959-5-30 3532 Colusa 1/4 mi nw of Lower Letts Valley (and 4 air mi n of Goat Mountain Lookout, in Mill Valley); Mill Valley Comment
  CAS-BOT-BC527290  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Below Letts Meadow on road from Bear Creek to Foutes Spring 914 Comment
  SEINET8201321 Image available Lemna trisulca J. M. Tucker, L. K. Mann, John Tothill 1959-1 3532 Colusa Mill Valley Comment
  UCD138193  Lemna trisulca C. Richie Bell 1951-6-13 1167 Colusa below Letts Meadow on road from Bear Creek to Foutes Spring. 914 Comment
  SEINET1908437  Lepidium latifolium G. K. Helmkamp, E. A. Helmkamp 2008-1 14257 Colusa Sacramento Valley: along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  SEINET2033409 Image available Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2008-1 14257 Colusa Sacramento Valley; along River Road (generally following the Sacramento River), 1.1 miles north of Colusa (Meridian 7.5' Q.: 39 deg. 13'33''N, 121 deg. 59'43''W, +/- 1000m). 18 Comment
  CAS-BOT-BC89759  Lepidium latipes Roxana S. Ferris 1917-4-12 532 Colusa 4 miles east of Williams. Comment
  POM143190  Lepidium latipes Roxana S. Ferris 1917-4-12 532 Colusa 4 miles east of Williams. Comment
  UC10646  Lepidium latipes J. Burtt Davy May 1898 Colusa near Willows Comment
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Sep 15 2014
  UC398784  Lepidium latipes Brandegee Apr 1889 Colusa Colusa Junction Comment
  UCD57286  Lepidium latipes var. latipes Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3657 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 322 Comment
  CAS-BOT-BC89886  Lepidium nitidum Roxana S. Ferris 1917-4-12 514 Colusa 4 miles east of Williams. Comment
  UCD57342  Lepidium nitidum Sergio Testa 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  RSA799180  Lepidium strictum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17134 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 2.0 mi southeast of Sites. 85 Comment
  SEINET11293823  Lepidium strictum R. R. Halse 2012-3-28 8453 Colusa Williams, along 5th Street between intersections with C and D Streets, near railroad tracks. 24 Comment
  UCD63674  Leptochloa fusca subsp. fascicularis Hursh 1919-11-12 X 3341 Colusa Williams. Comment
  UCD63675  Leptochloa fusca subsp. fascicularis Elizabeth Wilson 1940-1 Colusa Colusa. 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
  CHSC25167  Leptosiphon acicularis Willis Ball 1970-4-4 96 Colusa 10 miles W. of Williams. Beside Highway 20. Comment
  UCD82365  Leptosiphon androsaceus Robin McMaster 1973-4-15 335 Colusa 1/2 mi towards Bartlett Springs from Bear Valley Road. Comment
  UCD64434  Leptosiphon bicolor Craig D. Thomsen 2001-4-12 2460 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
  RSA388851  Leptosiphon bicolor Eugene Tanimoto 1975-4-20 s.n. Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC79791  Leptosiphon bolanderi L. P. Janeway; B. Castro 2000-5-4 6706 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  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
  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
  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
  RSA232952  Leptosiphon ciliatus D. A. Young 1969-5-4 P- 325 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  RSA589923  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7288 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  HSC85855  Leptosiphon filipes Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  CAS-BOT-BC226707  Leptosiphon latisectus Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-5-6 027 Colusa 5.7 miles from Blue Oak Campground, North on Walker Ridge Road 853 Comment
  CHSC19694  Leptosiphon parviflorus L. A. Wright Jr. 1971-3-27 10 Colusa Ca. 7 mi w of Williams on Hwy 20, off the s side of the road about 150 ft, in a meadow next to a stream. 91 Comment
  CHSC79792  Leptosiphon parviflorus L. P. Janeway; B. Castro 2000-5-4 6703 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD63017  Leptosiphon parviflorus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4669 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the west of Cowboy Camp on the west side of Bear Creek. 404 Comment
  UCD81858  Leptosiphon parviflorus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5742 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
  UCD118988  Leptosiphon parviflorus Robert E. Preston 1995-6-2 869 Colusa Walker Ridge. 1005 Comment
  CHSC91040  Lesquerella occidentalis subsp. occidentalis D. Isle 2003-6-24 376 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. On Colusa/Lake County line, 1/8 mi. SE of Goat Mt. Lookout. 1841 Comment
  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
  CAS-BOT-BC341800  Lessingia nemaclada M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  JEPS94654  Lessingia ramulosa Vernon H. Oswald and Lowell Ahart 1998-7-15 9276 Colusa on Sawtelle Valley Rd. 0.4 mi n Bartlett Springs Rd. (w side of county) 670 Comment
  UC2014145  Lessingia ramulosa Ellen Dean, C. Thomsen, T. Hansen, windfarm meeting 2010-6-11 6145 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  UCD84559  Lessingia ramulosa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6084 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  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
  JEPS43214  Lewisia rediviva W. L. Jepson 1932-5-7 16280 Colusa Lodoga 457 Comment
  UCD56657  Lewisia rediviva Sam Bledsoe 2007-3-25 5 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, ca. 500 ft south of road. 569 Comment
  UC1736070  Lewisia rediviva var. rediviva Dean W. Taylor 1993-3-18 13310 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek, 411 Comment
  JEPS19624  Limnanthes douglasii subsp. rosea W. L. Jepson 1932-5-7 16265 Colusa Indian Valley; w Colusa Co. Comment
  UC71645  Limnanthes douglasii subsp. rosea Miss Alice King 1905-1 Colusa College City Comment
  UCD66941  Limosella acaulis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5090 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  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
  UC106857  Linanthus androsaceus Brandegee 1889-1 Colusa 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
  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
  UC1745721  Linanthus ciliatus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-7 1376 Colusa Open ridge crest 0.1-0.2 mi. W of summit of Rumsey-Arbuckle rd. 4.2 mi. from Rumsey. Comanche Hills (?). Comment
  UC71654  Linanthus ciliatus Miss Alice King 1905-1 Colusa College City Comment
  UC907804  Linanthus dichotomus Herbert L. Mason 1941-4-5 12407 Colusa 1 mi s Stonyford Comment
  HSC89699  Linanthus dichotomus Eric German, Klara Varga, Michele Cardinaux 1989-4-15 35 Colusa Goat Mtn. Rd. .2 mi. from Lodoga/Stonyford jct. 152 Comment
  UCD118534  Linanthus dichotomus Beecher Crampton 1958-4-21 9172 Colusa 4 miles NW of Lodoga (by road). Comment
  UC125228  Linanthus filipes Katharine Brandegee Apr 1889 Colusa Leesville Comment
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Aug 28 2012
  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
  JEPS39670  Linanthus parviflorus Rimo Bacigalupi, and T. Crovello, and L. Heckard 1965-4-26 9047 Colusa 2.5 mi from Ladoga junction (at summit w of Bear Valley on road to Bartlett Springs, Colusa-Lake County boundary) 670 Comment
  UCD39927  Linum Beecher Crampton 1995-6-4 10323 Colusa Lake County Border: State Highway 20. Comment
  JEPS15252  Lithophragma affine Rimo Bacigalupi with G. Ledyard Stebbins and Peter Kamb 1950-4-16 3111 Colusa 4 mi s Ladoga (and 6 mi nnw of Leesville, along Little Indian Creek); Indian Valley, Little Indian Creek 396 Comment
  CHSC112234  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Ranges. On the north side of the of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC45699  Logfia filaginoides Christopher Knopp 1978-4-22 12 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 412 Comment
  UCD159333  Logfia filaginoides D. S. Park 2010-6-5 117 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  UCD84437  Lolium perenne Jack Alderson 2009-4-19 35 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella Flat. 553 Comment
  CHSC32224  Lomatium ciliolatum James Jokerst 1980-8-6 1052 Colusa Near Snow Mountain (West). Comment
  UC1409830  Lomatium ciliolatum var. ciliolatum James E. Eckenwalder and Dale E. Johnson 1974-6-2 358 Colusa below summit of East Peak Snow Mt. (on divide between East & West Peaks); , East Peak Comment
  UCR139083  Lomatium ciliolatum var. hooveri A. Burgard, J. Goldsmith, J. Kalt 1996-3-30 23 Colusa Brim Road 9.4 mi north of Walker Ridge Road. 57 mi east of Hwy 101 on Hwy 20 777 Comment
  HSC60362  Lomatium ciliolatum var. hooveri Phyllis Krieg 1979-4-14 Colusa 1067 Comment
  UCD57548  Lomatium dasycarpum subsp. dasycarpum Cindy Yip; 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. 304 Comment
  CHSC91009  Lomatium dasycarpum subsp. tomentosum D. Isle 2002-4-18 289 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Motorcycle info. Center and Fouts Spring Rd., above 18N01.2 jct. w/ OHV trail. 451 Comment
  CAS-BOT-BC478201  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner Coast Ranges: Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 miles northwest of intersection with East Ruby King Road 419 Comment
  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
  UC1049547  Lomatium hooveri Rimo Bacigalupi 1950-4-16 3117 Colusa Bartlett Mt. Road, base of grade just W of Bear Valley, near Colusa-Lake County line 426 Comment
  UC1312855  Lomatium hooveri L. Constance 1965-4-13 3756 Colusa between Clear Lake Oaks and Williams (Hwy. 20 2.7 mi. w. of Hwy. 16) 548 Comment
  UCD162978  Lomatium hooveri Jack Major 1963-5-4 s.n. Colusa West of Bear Valley on Bartlett Springs road. (Exact location unknown. Coordinates estimated by label maker.) 609 Comment
  UCD58105  Lomatium hooveri Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3352 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 556 Comment
  UCD150867  Lomatium hooveri Clinton C. Shock 1980-5-3 73 Colusa Walker Ridge, 14.6 miles north of State Highway 20, at intersection with road to Bear Valley. 670 Comment
  CHSC112235  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa Inner North Coast Ranges. Near a small drainage, north of the of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS121106  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa On the N side of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD163208  Lomatium macrocarpum Craig D. Thomsen 2000-4-28 2206 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD82531  Lomatium macrocarpum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5683 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  JEPS16220  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  UC763095  Lomatium marginatum var. purpureum R. F. Hoover 1938-4-24 3214 Colusa foothills w. Arbuckle (Sand Creek); Sand Creek Comment
  JEPS17548  Lomatium utriculatum Alice King May, 1906 Colusa College City Comment
  UCD56934  Lomatium utriculatum Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3536 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Thompson Canyon. 344 Comment
  SEINET215143  Lomatium utriculatum Linda Lea Ferwerda 1968-5-4 Colusa Wilbur springs road 8 miles northwest from its junction with State highway 20 408 Comment
  SEINET11262797  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites Logoda Road ca. 5.2 miles NW of Sites.; 0 175 Comment
  SEINET7760664 Image available Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 mi NW of Sites. 175 Comment
  SEINET9672754  Lomatium vaginatum R. R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road, ca. 5.2 mi NW of Sites. 175 Comment
  UCD63113  Lonicera interrupta Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4944 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
  CDA19165  Lonicera involucrata var. ledebourii R. Breckenridge, D. Kratville 1999-10-13 PDR 909448 Colusa North Coast Ranges; Lower Letts Lake, Stonyford. 0 Comment
  CHSC48018  Lonicera involucrata var. ledebourii Vernon Oswald 1984-7-20 1618 Colusa Letts Lake in Mendocino National Forest. Comment
  JEPS108723  Lotus corniculatus Lowell Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA725013  Lotus corniculatus L. Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  UC1299188  Lotus crassifolius var. crassifolius Freed W. Hoffman 1948-6-27 2515 Colusa 8.6 mi s Fouts Springs (w Colusa Co.); Upper Letts Valley Comment
  UCR227340  Lotus denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  JEPS60197  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2231 Colusa 1.5 mi ne Fouts Springs (near junction of Stonyford-Fout Springs road and Trough Spring Ridge road) 670 Comment
  RSA516409  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2236 Colusa Along Trough Spring Ridge road 1/2 mile southwest of its junction with the Stonyford-Fouts Spring road (about 5 miles west of Stonyford). 732 Comment
  HSC72211  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1980-6-24 5879 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  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
  UC726672  Lupinus A. A. Heller 1940-4-21 15542 Colusa along U.S. Highway #99W, 2 mi s Williams 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
  UC71651  Lupinus affinis Miss Alice King 1905-1 Colusa College City Comment
  HSC40211  Lupinus albifrons J. P. Smith, Thomas W. Nelson 1976-4-14 8580 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  HSC91367  Lupinus albifrons A. Smith, A. Eller, B. Hoffman 1989-4-15 23 Colusa 3 mi. SW of Digger Pine Campground, on Goat Mtn. Rd. 152 Comment
  CAS-BOT-BC198400  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 3832 Colusa W. of Williams Comment
  CHSC84920  Lupinus albifrons var. albifrons Ron P. Garcia 1995-4-1 2 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
  JEPS80129  Lupinus albifrons var. collinus L. R. Heckard with J. Hickman 1980-7-1 5288 Colusa ca 10 mi w Stonyford (on trail from Summit Springs to Frog Lake, Colusa-Lake County boundary); Snow Mt., trail fr Summit Springs to Frog Lake 1706 Comment
  UCD66966  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5010 Colusa west of I-5 at Maxwell, east slope of Goat Mountian, along Goat Mountain Road, between Cedar grove campground and the summit, near crossing of tributary of Little Stoney Creek. 1309 Comment
  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
  HSC85823  Lupinus albifrons var. collinus David Munger, Tallchief Comet, Jeff Dunk 1987-4-12 77 Colusa Comment
  HSC89708  Lupinus albifrons var. eminens Eric German, Klara Varga, Michele Cardinaux 1989-4-15 36 Colusa 3 mi. SW of Digger Pine Campground on Goat Mtn. Rd. 152 Comment
  CDA11420  Lupinus bicolor G. F. Hrusa, K. van Katwyk 1995-4-22 12141 Colusa Inner North Coast Ranges; Side of Leesville Rd. approx. 4 m. NW of Hwy. 20. Comment
  CHSC27856  Lupinus bicolor Phil Blumert 1978-3-28 18 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
  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
  HSC72138  Lupinus bicolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9570 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  JEPS81297  Lupinus bicolor L. R. Heckard with J. C. Hickman 1982-7-5 5911 Colusa below Summit Springs (S side Snow Mt.) Comment
  RSA724140  Lupinus bicolor Richard R. Halse 2002-3-21 6131 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET5320895  Lupinus bicolor Unknown 2002-3-21 6131 Colusa Williams; By junction of 5th Street and B Street 20 Comment
  UC764136  Lupinus bicolor R. F. Hoover 1938-4-24 3219 Colusa w Arbuckle (Sand Creek foothills); Sand Creek foothills 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
  HSC89739  Lupinus bicolor A. Eller, A. Smith, B. Hoffman 1989-4-15 20 Colusa Brim Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  SEINET10484945  Lupinus bicolor subsp. tridentatus Thomas W. Nelson, Jane P. Nelson 1978-4-29 Nelson 3938 Colusa Colusa co. T149,r5w,sec. 35; Elev. 1200'. Along bear valley rd. 2.5 Miles From junction with state route 20. Oak woodland. 366 Comment
  SEINET12164083  Lupinus densiflorus Unknown 1984-1 11 Colusa ca Salt Canyon, N side of Salt Crk, Hwy 20, 11miWSW of Williams. Wilbur Springs Quad 143 Comment
  RSA424726  Lupinus densiflorus var. palustris Aaron Liston, M. Blumler 1987-4-26 668 -1 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CAS-BOT-BC8485  Lupinus formosus var. robustus Amos Arthur Heller; H. E. Brown 1902-5-20 5573 Colusa Near College City Comment
  RSA0003424  Lupinus formosus var. robustus A. A. Heller, H. E. Brown 1908-5-20 s.n. Colusa Near College City. Comment
  CHSC84200  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the east and west side of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. 379 Comment
  UCD81894  Lupinus luteolus Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5778 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Along Bear Creek opposite Cowboy Camp parking lot, on W side of creek. 314 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
  CHSC71113  Lupinus microcarpus var. densiflorus Jan Monelo 1989-4-1 7 Colusa In hillside spanning Hwy 20. Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  UC1053479  Lupinus microcarpus var. densiflorus Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3176 Colusa 10 mi nw Sites (Grapevine Grade to Lodoga); Grapevine Grade to Lodoga Comment
  UCR206292  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14736 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  JEPS108050  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Road, 4.4 mi N Leesville. 457 Comment
  CHSC107948  Lupinus microcarpus var. microcarpus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1849 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 170 ft northeast of Tehama-Colusa Canal. Ca 0.15 mi S of large +- saline/alkaline wetland/ marsh, on dry grassy hillside just downslope from canal. 59 Comment
  CHSC938  Lupinus microcarpus var. microcarpus V. Holt 1946-4-18 Colusa Cache Creek. 365 Comment
  SEINET12165154  Lupinus milo-bakeri Unknown 1985-1 50656 Colusa Bear Vly. W of Williams 404 Comment
  HSC83319  Lupinus subvexus var. subvexus C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 33 Colusa Bear Valley, Bear Valley Rd. Comment
  HSC86906  Lupinus subvexus var. subvexus Terry Hines, Ellen Purcell, N. Williams 1988-4-17 58 Colusa 1.3 mi. S on Bear Valley Rd. from corner of Brim Rd. 396 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  SD239748  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites. 92 Comment
  UCD56925  Lupinus succulentus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3528 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  HSC89693  Lupinus succulentus William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Colusa Walker Ridge Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  HSC48193  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3963 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  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
  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
  CHSC94496  Lythrum californicum Lowell Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA0014831  Lythrum californicum Roxana Stinchfield 1916-7-11 433 Colusa Davis Tule, near Sycamore Slough. Comment
  JEPS108741  Lythrum hyssopifolia Lowell Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD66929  Lythrum hyssopifolia Craig D. Thomsen; G. Harrington 2008-7-6 2773 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  CHSC107979  Lythrum tribracteatum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1884 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  CHSC61479  Lythrum tribracteatum Vernon H. Oswald; Lowell Ahart 1993-5-27 5429 Colusa Sites-Lodoga Rd. ca. 0.5 mi NW of Sites in the rolling, grass-covered hills bordering the W side of the Sacramento Valley. 121 Comment
  CHSC84956  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS104406  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  JEPS4791  Madia elegans Rimo Bacigalupi with L. R. Heckard 1951-8-6 3472 Colusa 1 mi se Sites (in canyon near stone quarry) Comment
  UCD162973  Madia elegans Jack Major 1963-5-4 s.n. Colusa Bear Valley in grassland at south end of the valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  CHSC94407  Madia elegans subsp. densifolia Lowell Ahart 2006-8-22 13229 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS108735  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC27631  Madia exigua Timothy Spira; Robert Schlising 1978-5-13 3239 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC79467  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1111 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  JEPS108730  Madia exigua Lowell Ahart 2006-6-11 12665 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
  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
  JEPS80125  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  UCD159852  Madia hallii G. Ledyard Stebbins 1985-4-19 C 503 Colusa South end of Walker Ridge, along Walker Ridge Road, 0.25 miles northeast of its junction with road to Indian Valley Dam. (Note by label-maker: Section 12 is farther than 0.25 miles NE of road to Indian Valley Dam. Georeferenced this record in Section 13). Comment
  RSA262347  Maianthemum stellatum J. M. Tucker, L. K. Mann 1959-5-30 3529 Colusa Small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout 1220 Comment
  UCD139118  Maianthemum stellatum J. M. Tucker; L. K. Mann 1959-5-30 3529 Colusa Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1219 Comment
  CAS-BOT-BC206317  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa Wash below the road near the foot of the grade east of Lodogo on the Sites-Lodogo Road Comment
  UCD82630  Malacothamnus fremontii Jack Alderson 2009-8-6 26 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Southern part of the ranch, just N of confluence of Bear and Cache Creeks. 243 Comment
  JEPS127598  Malacothamnus fremontii David Isle with Frank Elliott 2014-6-11 2134 Colusa Frank and Judy Elliott Ranch, ca 1 mile S of Rail Canyon Road junction with Sites-Lodoga Road and ca 1/2 mile S of Sites-Lodoga Road. Comment
  RSA0118715  Malacothamnus fremontii David Isle, Rhonda Isle 2013-6-23 2044 Colusa Just E of Maxwell Grade Summit and pass; N of sites Lodoga Road. In July 2012 Sites Fire Area. 562 Comment
  SBBG128730  Malacothamnus fremontii D. Isle, R. Isle 2013-5-22 2043 Colusa 0.1 mi W of Maxwell Grade Summit 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
  JEPS36621  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek 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
  CHSC27632  Malacothrix floccifera Timothy Spira; Robert Schlising 1978-5-13 3237 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC86522  Malacothrix floccifera B. Castro; Beth Hendrickson 2003-3-19 1393 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  HSC47459  Malacothrix floccifera J. P. Smith 1978-4-22 9745 Colusa Bear Valley Rd., 1.2 mi. from its junction with Hwy. 20 412 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
  UC1212583  Malacothrix floccifera Francia Chisaki and Helen Sharsmith 1959-5-27 1336 Colusa 1.6 mi e Cooks Spring (on road to Cooks Spring); Inner North Coast Ranges Comment
  SEINET7096534  Malva parviflora Richard R. Halse 2001-3-22 5945 Colusa Williams; along a vacant lot by 455 - 4th street Weedy roadside; 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  CHSC107935  Malvella leprosa B. Castro; Amy Lyons 2011-8-3 1902 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 0.7 mi southeast of Funks Reservoir and 350 ft northeast of Tehama-Colusa Canal. In grassland in patch under transmission lines ca 0.3 mi northwest of large +- alkaline marsh. 52 Comment
  CHSC96927  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
  RSA726801  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UC1368667  Malvella leprosa L. M. Moe 1969-7-29 98 Colusa along Butte Creek ca. 3 mi. n.e. Colusa (also along rd. of Butte Creek Outing Club property); Butte Creek Comment
  UCD63127  Malvella leprosa Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4957 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Destinella Flat on the south side of Hwy 20, just east of the Lake County line, ca 3.4 rd miles west of junction with Hwy 16. 551 Comment
  SBBG121613  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa N side of the Gridley Colusa Hwy ca. 1.25 mi E of River Rd, ca. 17 mi W of Gridley 20 Comment
  UCD80838  Marah fabacea Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5295 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Ridge between Brophy Canyon and the canyon to its north. Highest point just above northern canyon at its terminus in a stock pond. 512 Comment
  CAS-BOT-BC361307  Marah watsonii Richard R. Halse 2013-3-26 8744 Colusa Along the Leesville-Logoda Road ca 5.5 miles S of Logoda, or 3.2 miles N of the junction of the Leesville and Bear Valley Roads; Indian Valley 426 Comment
  SEINET4208912  Marah watsonii Richard R. Halse 2013-3-26 8744 Colusa Along the Leesville-Logoda, or 3.2 miles north of the junction of Leesville and Bear Valley Roads; Indian Valley.; 0 426 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
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  UCD58123  Matricaria discoidea Ellen Dean; PLB 102 Class 2007-4-29 3719 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Near 'Roadkill Cafe. 414 Comment
  UC1051742  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes) 762 Comment
  SEINET255529  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCD81219  Medicago polymorpha Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5556 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridges to the south of Destanella Flat. 483 Comment
  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
  CDA14215  Melica californica G. F. Hrusa 1993-5-2 10859 Colusa Frenzel Creek Research Natural Area; Mendocino National Forest. Small colony of several clumps on lower NW facing slopes in mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Scattered among openings in sparse Quercus durata chaparral. Perennial. Comment
  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
  UCD86457  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  JEPS80810  Melica harfordii L. R. Heckard and J. C. Hickman 1981-7-31 5783 Colusa Fouts Springs Overlook Snow Mt. (e side of Snow Mt.) 1813 Comment
  JEPS121114  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  CHSC94747  Melilotus albus Lowell Ahart 2006-9-26 13349 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  JEPS108722  Melilotus albus Lowell Ahart 2006-9-26 13349 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS108889  Melilotus indicus Lowell Ahart 2006-8-9 13168 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CDA16093  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa North Coast Ranges; Little Stony Creek 457 Comment
  UCD169976  Melilotus officinalis G. F. Hrusa 1999-5-16 15050 Colusa Little Stony Creek. 457 Comment
  RSA718054  Mentha arvensis L. Ahart 2006-8-9 13090 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  JEPS110099  Mentha canadensis Lowell Ahart 2006-8-9 13166 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC94511  Mentha rotundifolia Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC84983  Mentha spicata Lowell Ahart 2003-10-23 10666 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC2042873  Mentzelia dispersa Barbara Ertter 1989-7-1 8598 Colusa Road to Goat Mt. Lookout 2.2 mi S of Route M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 air miles WSW of Stonyford. Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  UC1053474  Mentzelia micrantha Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3181 Colusa just w Bear Valley (Burned slope just west of base of the grade to Indian Valley(Bartlett Mt. Road)); Inner North Coast Ranges Comment
  CHSC87161  Micranthes californica Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 Comment
  POM174563  Micropus californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit on grade. Williams- Stonyford Road Comment
  UCD67938  Micropus californicus Allen Hahus 1978-5-6 25 Colusa Bear Valley, along Bear Valley Road, 6.3 mi. N. of Hwy. 20. West side of hill. 396 Comment
  SEINET7075567  Micropus californicus var. californicus A. G. Vestal 1955-4-5 s.n. Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  UC638694  Micropus californicus var. californicus Ethel Crum 1938-5-7 2011 Colusa summit of ridge 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  POM290253  Microseris Lyman Benson 1933-4-16 4325 Colusa Abbott Mine; Inner North Coast mountain range; north fork Cache Creek 762 Comment
  UC71639  Microseris campestris Miss Alice King 1905-1 Colusa College City Comment
  CHSC112209  Microseris douglasii subsp. douglasii Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC112006  Microseris sylvatica David Isle 2005-10-7 2126 Colusa Pendell Ranch, S of Fouts Sps Rd 18N01 (M10), 2 mi W of Co Rd 306 Jct; In black adobe soil 150 yds S of Pendell home. 384 Comment
  CHSC86524  Microsteris gracilis B. Castro; Beth Hendrickson 2003-3-19 1391 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  UCD163671  Microsteris gracilis Craig Thomsen 1999-4-15 1971 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD57339  Microsteris gracilis Robin Testa 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  JEPS86644  Mimulus arvensis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6715 Colusa 0.5 mi w Summit Springs (sw flank of mountain); Snow Mountain, Colusa-Lake County line Comment
  HSC31628  Mimulus aurantiacus var. aurantiacus Glenn McGourty 1974-4-20 13 Colusa Roadcut of Hwy. 16, 17 mi. E of Esparto Comment
  UCD122617  Mimulus douglasii Delanne Belshaw 1975-4-20 11 Colusa Bear Valley Road, 7.8 miles north of junction of State Highways 20 and 16. Comment
  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
  JEPS80762  Mimulus floribundus L. R. Heckard and J. C. Hickman 1981-7-30 5729 Colusa crossing Trout Creek (se side of mt.); Snow Mt. 1828 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
  SEINET13710597  Mimulus guttatus Lowell William Ahart, Lowell William Ahart 2003-1 10383 Colusa 21 Mi. SW of Williams, about 2 Mi. SW of Jct. Hwy 20 with Bear Valley Road (39 Deg 00'23.7"N, 122 Deg 23'59.5"W) 1708 Ft. 521 Comment
  UCD64424  Mimulus guttatus Craig D. Thomsen 2000-4-28 2187 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82521  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2878 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  JEPS14629  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  RSA114162  Mimulus layneae H. K. Sharsmith 1953-6-20 4290 Colusa 5 miles beyond Trough Springs on road to Goat Mountain, Mendocino National Forest. 1280 Comment
  SEINET7881836 Image available Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa Mendocino Nat For ; In metamorphic rubble of forest clearing 5 mi beyond Trough Springs on rd to Goat Mt. 1280 Comment
  JEPS104385  Mimulus microphyllus Lowell Ahart 2003-7-14 10383 Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  JEPS3633  Mimulus microphyllus H. L. Mason 1953-5-5 14518 Colusa 1/4 mi above confluence of Little Stony Creek and Trout Creek; Little Stony Creek drainage 670 Comment
  JEPS80055  Mimulus microphyllus L. R. Heckard and J. Hickman 1979-6-15 5055 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  UCD122648  Mimulus microphyllus R. A. Christison 1960-4-17 28 Colusa on road to Wilbur Springs, 2 miles north of State Highway 20. Comment
  JEPS11151  Mimulus nudatus R. F. Hoover 1941-5-2 4982 Colusa just e Lake County line (on Williams-Clear Lake highway, about 6 mi s of Wilbur Springs) Comment
  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
  UC886310  Mimulus nudatus Alice Eastwood, John Thomas Howell 1938-5-16 5636 Colusa on road to Williams (Lake-Colusa county line) Comment
  JEPS108907  Mimulus pilosus Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  RSA724962  Mimulus pilosus L. Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  RSA794844  Mimulus pilosus D. Isle, Rhonda Isle 2010-7-21 1915 Colusa West shoreline of East Park Reservoir on bank just north of spillway; within 2 to 4 feet of water line. 365 Comment
  JEPS10517  Mimulus tricolor Ruth Johnson 1915-4-6 Colusa College City Comment
  CHSC86967  Minuartia douglasii B. Castro 2003-5-15 1436 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Above dirt rd paralleling a S-trending canyon. 179 Comment
  RSA423545B  Minuartia douglasii J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9535 Colusa Bear Valley Road, 1.3 miles from its junction with State Route 20. 366 Comment
  UC72586  Minuartia douglasii Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley 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
  UCD82364  Minuartia douglasii Robin McMaster 1973-4-15 334 Colusa middle of Bear Valley. Comment
  CHSC91050  Minuartia nuttallii subsp. gregaria D. Isle 2003-6-12 362 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Goat Mt.--meadow 1/4 mi. below road N80 E from jct. of Rd. to Goat Mt. lookout and Horse Glade Rd. GPS: 10S 0524032E 4346780N. 1645 Comment
  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
  CAS-BOT-BC229599  Mirabilis greenei Volney Rattan 1884-6-1 s.n. Colusa Coast Mountains N of San Francisco Bay. Flood-bed of Stony Creek Comment
  JEPS61324  Mirabilis greenei W. L. Jepson 1932-5-8 16299 Colusa n of Stonyford (w Colusa County) 365 Comment
  CHSC64094  Monardella glauca David Isle 1992-8-3 Colusa Snow Mountain. Comment
  JEPS73483  Monardella odoratissima subsp. glauca L. R. Heckard 1972-7-9 3094 Colusa On southeast slope East Peak; Snow Mt. 2072 Comment
  UCD67691  Monardella sheltonii D. Sanchez-Mata 1996-6-27 s.n. Colusa Williams, Blue Ridge, Bear Creek. 320 Comment
  CHSC48492  Monardella villosa subsp. villosa Vernon Oswald 1986-6-30 2172 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306, 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  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
  SD241081  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark Brunell 2006-8-3 4991 Colusa Southern Northern Inner Coast Ranges: Mendocino Nat. Forest; E face of Snow Mountain, Stony Creek along M10. 609 Comment
  UCD82537  Monardella villosa subsp. villosa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5690 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CAS-BOT-BC349576  Monolopia major James Jokerst 1985-4-5 2208 Colusa Near Coyote Peak 456 Comment
  CHSC85973  Monolopia major Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  JEPS34944  Monolopia major R. F. Hoover 1938-4-24 3223 Colusa Venado Comment
  UCD86504  Muhlenbergia andina Craig Thomsen 2004-9-16 s.n. Colusa along Goat Mountain road. Comment
  CHSC77974  Muhlenbergia rigens Beth Hendrickson; Natalie Wight, Heidi West 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 106 Comment
  UC1056271  Muhlenbergia rigens Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3166 Colusa eight mi nw Maxwell (along road to Sites, in canyon between forst hills on extreme w edge of valley); Sacramento Valley Comment
  UC719170  Muilla maritima F. G. Meyer 1938-4-5 1346 Colusa in meadow about 20 mi n Williams Comment
  CAS-BOT-BC83274  Myosurus minimus Herbert L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83277  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83282  Myosurus minimus James Jokerst 1986-5-6 2299 Colusa Near Lurline Creek. 41 Comment
  UC1738123  Myosurus minimus D. E. Stone 1955-5-2 7 -13 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  CAS-BOT-BC83281  Myosurus minimus Alice Eastwood 1922-4-24 11188 a Colusa Road between Princeton and Norman. Colusa/Glenn county line. Comment
  UC1101349  Myosurus minimus subsp. apus Herbert L. Mason 1953-4-5 14510 a Colusa 3 mi e of Maxwell Comment
  UC1028302  Myosurus sessilis George B. Rossbach 1955-4-9 271 Colusa 3 mi e Maxwell (Sacramento Valley); Sacramento Valley 18 Comment
  UC1101351  Myosurus sessilis Herbert L. Mason 1953-4-5 14508 Colusa 3 mi e of Maxwell Comment
  POM312437  Myosurus sessilis H. L. Mason 1953-4-5 14510 Colusa 3 miles east of Maxwell Comment
  CHSC110502  Myriophyllum hippuroides David Isle; Rhonda Isle, Charlie Lingerfelt 2011-8-24 1949 Colusa Stonyford Area Stony Creek Watershed. About 2.5 miles SE of Stonyford in coves of East Park Reservoir. 359 Comment
  UC1099999  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-9-9 1891 Colusa 1 mi e of Williams Comment
  UC1100003  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-7-18 1007 Colusa 2.5 mi w of Williams Comment
  UC1100011  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa 1.6 mi w of Williams (Road to Lake County) Comment
  CAS-BOT-BC456163  Najas guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa Two miles west of Colusa on Williams highway by bridge Comment
  SEINET3237610  Najas guadalupensis subsp. guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  CAS-BOT-BC259754  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade Willliams - Stonyford Road Comment
  POM174566  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade of Williams-Strongford Road Comment
  UCD87419  Nassella cernua Beecher Crampton 1958-5-19 4790 Colusa 10.7 miles southeast of Leesville. Comment
  UCD63742  Nassella lepida Craig D. Thomsen 2008-5-23 2751 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
  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
  CHSC112919  Navarretia heterandra B. Castro; Robin Carter, Amy Lyons 2010-5-13 1806 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in distrubed, grazed annual grassland. 119 Comment
  CHSC79544  Navarretia heterandra B. Castro; L. P. Janeway 2000-5-3 1124 Colusa Vicinity of Sites, Huffmaster Rd, and Grapevine Creek. 371 Comment
  CHSC88525  Navarretia heterandra B. Castro 2003-5-15 1440 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On N-facing side of small 'pass' in unnamed tributary to Lurline Ck. 195 Comment
  CHSC89844  Navarretia heterandra B. Castro; L. Janeway 2001-5-2 1242 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
  JEPS108184  Navarretia jepsonii David Gowen 2005-6-22 446 Colusa Goat Mtn. Rd. (dirt road), ca. 1 mile E. of Ladoga Stonyford Rd., just inside the Mendocino Nat'l Forest boundary. Comment
  UC1552812  Navarretia jepsonii Frederica Bowcutt 1985-6-20 607 Colusa n of Hwy. 20; Walker Ridge 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
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD36308  Navarretia jepsonii Beecher Crampton 1949-9-25 494 F Colusa Colusa County, 18 miles east of Bartlett Springs. Comment
  CHSC107942  Navarretia leucocephala subsp. leucocephala B. Castro; L. Janeway 2011-4-27 1866 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  CHSC86971  Navarretia nigelliformis B. Castro 2003-5-14 1432 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. At lower end of SE-trending ridge, on west edge of Sacramento Valley. 134 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
  UCD57871  Navarretia nigelliformis subsp. nigelliformis Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 51 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  UCD63739  Navarretia pubescens Craig D. Thomsen 2008-5-23 2745 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 415 Comment
  UCR261750  Navarretia tagetina Ann Howald 2003-5-29 2349 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.6 miles north of Lodoga, 0.1 mi south of Chisolm Cove Group Campground 385 Comment
  UC726846  Navarretia viscidula A. A. Heller 1940-6-7 15812 Colusa 3 mi s Stonyford Comment
  UCD63119  Nemacladus montanus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4949 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  UC107269  Nemophila heterophylla K. Brandegee April 1889 Colusa Stites Comment
  UCD169730  Nemophila heterophylla Richard R. Halse 2013-3-26 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCR206395  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-3-11 14372 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  RSA589947  Nemophila heterophylla Michael A. Vincent, Robert M. Rhode 1996-3-30 7272 Colusa Along St Hwy 16, near mile marker 6/65, a little N of the Yolo Co. line; 6.65 mi S jct St Hwy 20. Comment
  CHSC36121  Nemophila menziesii P. Reynolds 1980-4-12 12 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UCSB23986  Nemophila menziesii Masero, Ann 1967-2-12 Colusa Along roadside of Wilber Springs Road; 1.4 miles south of Wilber Springs; in Northern inner Coastal Ranges 548 Comment
  JEPS86600  Nemophila parviflora L. R. Heckard with P. C. Silva, R. L. Moe and M. Moe 1988-6-19 6707 Colusa 0.5 mi ne Summit Springs (1987 burn area (Garry oak area,) sw flank Snow Mountain, Colusa Lake Co. Line); sw flank Snow Mountain, ne of Summit Springs, Garry oak area 1700 Comment
  UC1586079  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, at bend in road, 1.7 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork of Stony Creek); South Fork of Stony Creek, rd to Goat Mt. Lookout 1463 Comment
  UC595048  Nemophila pedunculata Annetta Carter 1938-5-8 1381 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC638658  Nemophila pedunculata Ethel Crum 1938-5-8 2025 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD63012  Nemophila pedunculata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4665 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  RSA141313  Nemophila pedunculata J. M. Tucker, Theodore F. Niehaus 1960-4-3 3584 Colusa 9.1 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  CHSC62851  Nicotiana glauca Vernon H. Oswald; Lowell Ahart 1994-3-23 6024 Colusa Goat Mtn. Rd. 1.8 mi W of Stonyford-Lodoga Rd., S of Stonyford. Between the road and Little Stony Creek. 487 Comment
  RSA140854  Nicotiana glauca John H. Thomas 1960-8-29 8846 Colusa About 11 miles SW of Williams along Hwy 20. Comment
  CHSC113037  Nicotiana quadrivalvis Lowell Ahart 2013-10-1 19085 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  UC34994  Nicotiana quadrivalvis J. Burtt Davy May 1898 4304 Colusa near Princetown Comment
  JEPS127817  Orobanche bulbosa Susan Fawcett 2014-5-13 226 Colusa Walker Ridge, near border of Lake and Colusa Counties. Comment
  RSA0006070  Orobanche comosa H. P. Chandler 1905-10 s.n. Colusa Princeton Comment
  SEINET4854289  Orobanche grayana var. jepsonii H. P. Chandler s.n. Colusa Princeton. Comment
  SEINET8854072 Image available Orobanche grayana var. jepsonii H. P. Chandler 1905-1 s.n. Colusa Princeton Comment
  UCD40886  Orthocarpus purpurascens G. Robinson 1984-4-21 3 Colusa About 50 yards west of Wilbur Springs Road on Bear Valley Road. 3.2 miles north of Hwy 20. 390 Comment
  UCD57070  Oryza sativa Beecher Crampton 1963-9-9 6894 Colusa 1/4 mile E of Cortena. Comment
  SEINET519285  Osmorhiza berteroi L. P. Janeway 1998-3-7 5710 Colusa Along Pacific Ridge Rd. (16N06) 0.5 mi E of road to Spanish Ridge and Hough Springs. 1052 Comment
  CHSC72422  Osmorhiza chilensis L. P. Janeway; David Isle 1998-7-3 5710 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  UCD70305  Packera breweri D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  CAS-BOT-BC231236  Packera eurycephala var. eurycephala Roxana Stinchfield Ferris 1926-4-23 6454 Colusa Stonyford. Comment
  UC1543129  Packera greenei Donald G. Nelson 1940-6-9 Colusa w of Stoneyford Road to Snow Mountain area (road to Bonnie View) 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
  UC1101588  Panicum capillare Herbert L. Mason 1945-9-19 12719 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink Comment
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  UC1151667  Parapholis incurva Beecher Crampton 1958-5-19 4825 -A Colusa along US Hwy 99-W, 4 mi s Maxwell Comment
  UCD37195  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa Colusa County, 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCD88609  Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa 2 miles east of Maxwell. Comment
  CDA11257  Parnassia californica G. F. Hrusa 1994-11-7 11992 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. Frenzel Creek a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  CHSC84651  Pedicularis densiflora Matt Quinn 2001-3-31 33 Colusa Found on Walker Ridge, north of Highway 20 between Bear Valley and Clear Lake, at the top of the road leaving Bear Valley. On ridgetop. 664 Comment
  UCD165931  Pedicularis densiflora Ellen Dean; with Tom Starbuck 2016-4-24 8842 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 398 Comment
  HSC62929  Pedicularis densiflora Kenneth Clark 1979-4-14 92 Colusa 1067 Comment
  UCD161828  Pediomelum californicum James A. Neilson Jr. 1980-6-15 3426 Colusa Wilbur Hot Springs. (Exact location unknown. Coordinates estimated by label maker.) Comment
  CHSC43542  Pellaea andromedifolia Lowell Ahart 1976-11-14 1003 Colusa About 3 miles west of Sites. 365 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
  HSC72153  Pellaea mucronata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9566 Colusa Bear Valley Rd. 2.1 mi. from its jct. with Hwy. 20 366 Comment
  RSA590198  Pellaea mucronata Michael A. Vincent, Robert Road 1996-3-30 7281 Colusa Along Bear Valley Road above Bear Creek, 1.4 miles south junction Wilber Springs Road. Comment
  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
  CHSC86960  Pellaea mucronata var. mucronata B. Castro 2003-4-10 1423 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. In E-trending small side canyon tributary. 146 Comment
  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
  UCR37571  Penstemon heterophyllus Michelle A. Strull, Et al. 1984-4-28 12 Colusa Brim Road 1.6 mi west of Leesville-Lodoga Jct. 419 Comment
  UCR225459  Penstemon heterophyllus subsp. australis Ellen Dean, Gordon Harrington J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5114 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 551 Comment
  RSA407923  Penstemon heterophyllus subsp. purdyi Jens Clausen 1935-5-20 1009 Colusa Ca 12 mi SW of Williams on Barlett Springs Road. Comment
  UCD67126  Penstemon heterophyllus var. azureus Ellen Dean; Davis Botanical Society 2008-5-31 5056 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  JEPS7560  Penstemon heterophyllus var. heterophyllus W. L. Jepson 1920-3-23 8963 Colusa Mountainside above Venado (sw Colusa Co.); Mountainside above Venado 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
  NY601787  Penstemon heterophyllus var. purdyi J. R. Maze 1971-4-14 955 Colusa About 2 miles south of pass just beyond Leesville on Stonyford - Williams road Comment
  UCD70233  Penstemon laetus subsp. sagittatus 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
  UC125238  Penstemon purpusii Katharine Brandegee 1892-8-24 Colusa Snow Mountain near Monument; Snow Mountain near the Monument Comment
  JEPS75749  Perideridia kelloggii L. R. Heckard, and R. Bacigalupi 1976-9-6 4428 Colusa along trail from Summit Springs to Fout's Camp (Colusa-Lake Co. line); Snow Mt. 1798 Comment
  UC1389985  Perideridia kelloggii Freed W. Hoffman 1947-6-19 1659 Colusa Cooks Springs North Coast Ranges (w Colusa Co.) Comment
  CHSC107483  Persicaria amphibia Jeanne Pendell 2010-7-17 1918 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East arm of East Park Reservoir, in the lake. 365 Comment
  UCD99460  Persicaria lapathifolia H. R. Drever 1945-8-24 s.n. Colusa Near Grimes. Comment
  CHSC94442  Persicaria maculosa Lowell Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD72534  Petrorhagia dubia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3825 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.5 mile downstream of bridge. 246 Comment
  UC1047027  Phacelia L. R. Heckard and C. R. Bell 1951-6-14 180 Colusa s-facing slope near Stonyford Comment
  CDA15464  Phacelia corymbosa G. F. Hrusa, WTD 1998-6-19 14601 Colusa North Coast Ranges; Above Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CDA16099  Phacelia corymbosa G. F. Hrusa 1999-5-16 15044 Colusa North Coast Ranges; above Fouts Springs. 594 Comment
  JEPS73516  Phacelia corymbosa L. R. Heckard 1972-7-10 3134 Colusa w Trout Creek; Snow Mt. 1828 Comment
  UC1299143  Phacelia corymbosa Freed W. Hoffman 1947-6-19 1615 Colusa Cook Springs Cook Springs (w Colusa Co.) 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
  RSA794842  Phacelia distans D. Isle 2008-4-9 1934 Colusa Reese Place Duck Club (4498 2 Mile Road); approx. 4 miles northeast of Maxwell. 30 Comment
  JEPS2352  Phacelia divaricata W. I. Follette 1935-3-31 25 Colusa Tahoe-Ukiah hwy 19.3 mi sw Williams (2.3 mi e of the Colusa-Lake Co. line. on or near Bear Creek, 3 1/2 mi se of Wilbur Spr.) Comment
  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
  UCD64438  Phacelia divaricata Craig D. Thomsen 2000-4-4 2071 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC12748  Phacelia egena L. V. Ritter 1969-4-30 227 Colusa Ca 10 mi. sw of Williams, s side of Highway 20. Comment
  UC901823  Phacelia egena L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3320 Colusa road cut 1 mi se Sites; Stone Corral Creek 76 Comment
  SD58509  Phacelia egena L. R. Heckard, C. R. Bell 1951-6-14 176 Colusa West facing serpentine slope near Stonyford. Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  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
  UCD57821  Phacelia imbricata Gordon Harrington 2007-4-17 32 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 552 Comment
  JEPS2143  Phacelia imbricata subsp. imbricata W. L. Jepson 1932-5-8 16296 Colusa n Stonyford (w Colusa Co.) 365 Comment
  UC901839  Phacelia imbricata subsp. imbricata L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3322 Colusa ridge between Bear Valley and Indian Valley (near Colusa-Lake Co. line) 609 Comment
  UC1051793  Phacelia mutabilis L. R. Heckard and C. R. Bell 1951-6-13 170 Colusa n slope of mt. Mendocino National Forest, Goat Mountain (ne of Bartlett Springs, along road from Bear Creek to Fouts Springs) Comment
  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
  CDA12020  Phacelia tanacetifolia G. F. Hrusa 1990-4-8 7671 Colusa North Coast Biodiversity Arena; Hwy 16 approx. 10 m. N of Rumsey, along Cache Creek. 198 Comment
Read comments
Jul 24 2009
  HSC44464  Phacelia tanacetifolia R. York 1978-4-22 141 Colusa Bear Valley Rd., 1.5 mi. from its junction with S.R. 20 409 Comment
  JEPS1305  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  RSA799178  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17129 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 93 Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC45512  Phacelia tanacetifolia M. Alcasas 1978-4-22 48 Colusa Bear Valley Rd., 2.3 mi. from Hwy. 20 419 Comment
  POM289798  Phacelia tanacetifolia Lyman Benson 1935-3-27 6338 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CAS-BOT-BC258849  Phalaris aquatica Alice Eastwood; John Thomas Howell 1940-6-10 7875 Colusa Williams Comment
  CAS-BOT-BC265958  Phalaris minor Roxana S. Ferris 1926-4-21 6282 Colusa 3 miles west of Colusa Comment
  UCD66454  Phalaris paradoxa Craig D. Thomsen 2000-5-12 2322 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  SEINET7096814  Phlox gracilis A. G. Vestal 1985-4-5 s.n. Colusa Along Route 16 about .2 mile south of Route 20 and near Bear Creek. NAD27, 39? deg. 00'36ao , -122?_ 21'22ao (converted to WGS84 decimal degrees). Comment
  SD257382  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the juncton with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian (Meridian 7.5'Q) 20 Comment
  UCR257578  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley, along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian 20 Comment
  UCD58166  Phyla nodiflora Gordon Harrington 2007-5-15 56 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
  POM63850  Phyla nodiflora Roxana Stinchfield 1916-6-11 444 Colusa Willow Lake near Colusa -Williams Road. Comment
  UCD125937  Phyla nodiflora Collector Unknown Date Unknown s.n. Colusa Exact location unknown. Comment
  UC985936  Physalis lancifolia Herbert L. Mason and Verne Grant 1946-8-7 12979 Colusa 8 mi n Colusa; Butte Sink Comment
  UCD126760  Physalis lancifolia P. B. Kennedy 1925-9-18 s.n. Colusa Cortena. Comment
  CDA5824  Physalis lancifolia Cowley Jul 1931 Colusa West of Colusa. 0 Comment
  CDA18788  Phytolacca americana J. D. 2000-4-28 PDR 019976 Colusa 2505 Zumwalt Rd., Williams. 30 Comment
  UC1051745  Pickeringia montana var. montana Helen K. Sharsmith 1953-6-20 4301 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  CHSC105196  Pinus attenuata B. Castro; L. P. Janeway 1999-7-5 1010 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along Lovelady Ridge rd ca 0.35 mi N of its jcn with USFS Rd 16N06, near top of Pacific Ridge. 1097 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
  CAS-BOT-BC242677  Piptatherum miliaceum Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  UCD72540  Piptatherum miliaceum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3831 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. East side of Bear Creek, just south of BLM parking lot (ca. 10 miles). 252 Comment
  CAS-BOT-BC227984  Plagiobothrys Doris K. Kildale 1928-5-8 5016 Colusa 3 miles S of Arbucle [Arbuckle] Comment
  CAS-BOT-BC227986  Plagiobothrys Doris K. Kildale 1928-5-8 5014 Colusa 3 miles S of Arbuckle Comment
  CHSC81227  Plagiobothrys bracteatus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CAS-BOT-BC230037  Plagiobothrys canescens Stephanie Castle; Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek 304 Comment
  CHSC79098  Plagiobothrys canescens B. Castro; C. Warren 2000-4-3 1046 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 173 Comment
  CHSC86878  Plagiobothrys canescens B. Castro 2003-3-28 1406 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 256 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
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  UC78083  Plagiobothrys fulvus var. campestris Katharine Brandegee April, 1889 Colusa Colusa Junction Comment
  UCD163690  Plagiobothrys fulvus var. campestris Craig Thomsen 1999-4-15 1992 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD66939  Plagiobothrys greenei Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5088 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCD18843  Plagiobothrys leptocladus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 151 A 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
  CHSC81234  Plagiobothrys nothofulvus Caroline Warren; Jenny Marr, Heidi West, Joyce Lacey-Rickert, Julie 1998-4-14 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 137 Comment
  SEINET3152906  Plagiobothrys nothofulvus M. A. King 1905-4-7 D Colusa College city Comment
  CHSC89859  Plagiobothrys scriptus B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1212 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. 91 Comment
  UC78102  Plagiobothrys shastensis unknown May 1886 Colusa Stites Comment
  UC71649  Plagiobothrys stipitatus Miss Alice King 1905-1 Colusa College City Comment
  POM287611  Plagiobothrys stipitatus Lyman Benson 1935-3-27 6340 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CHSC52671  Plagiobothrys stipitatus var. micranthus James Jokerst 1986-5-6 2304 Colusa Near Lurline Creek. Vernal pool. 41 Comment
  OBI6032  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2123 Colusa Sacramento Valley, 3 mi S of Arbuckle 43 Comment
  UCD163319  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD63008  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4661 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  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
  CHSC107958  Plantago coronopus B. Castro; T. Boullion 2011-4-20 1837 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  CHSC79538  Plantago coronopus L. P. Janeway; B. Castro 2000-3-23 6637 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CHSC114997  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  JEPS123891  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa About 5 1/2 miles east of Maxwell. Comment
  SEINET3873282  Plantago elongata Richard R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street.; 0 25 Comment
  SEINET8665579  Plantago elongata R. R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  CHSC112257  Plantago erecta Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18632 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC81283  Plantago erecta J. Trizzino 2001-3-31 18 Colusa Bear Valley Meadow along east side of Bear Balley Road. 396 Comment
  SEINET8665581  Plantago erecta R. R. Halse 2013-3-27 8761 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
  UCD56910  Plantago erecta Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3513 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD82465  Plantago erecta Craig Thomsen; G. Harrington 2009-5-12 2842 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC16823  Plantago erecta M. Dole 1963-4-15 71 Colusa 1 mi. S of the junction of Hwys. 16 and 20, on Hwy. 16 Comment
  HSC85854  Plantago erecta Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  SD147976  Plantago erecta L. Coats 1983-4-24 6 Colusa In the hills at the south end of Bear Valley, along Bear Valley Road, 6.3 miles south of Bartlett Springs Road. 487 Comment
  CHSC94452  Plantago lanceolata Lowell Ahart 2006-8-9 13153 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD138960  Platanthera dilatata var. leucostachys Neil Miller 1973-6-3 96 Colusa area south of Snow Mountain, around 7 miles west of Stonyford. Northwestern part of county. 1219 Comment
  CAS-BOT-BC93145  Platanus racemosa Roxana S. Ferris 1917-4-17 628 Colusa Sycamore Slough. Comment
  CHSC19695  Platystemon californicus L. A. Wright Jr. 1971-3-27 16 Colusa W side of Hwy 20, ca. 1 mi nw of junc of Hwy 16 and 20. 243 Comment
  CHSC27552  Platystemon californicus Scott E. Patton 1978-4-9 9 Colusa Ca. 0.3 m w of jct of Hwys 20 and 16, s side of Bear Creek, ca 18 sw of Williams. 321 Comment
  CHSC81294  Platystemon californicus J. Trizzino 2001-3-31 19 Colusa Bear Valley Meadow along east side of Bear Valley Road near creek. 396 Comment
  UCD96031  Platystemon californicus Beecher Crampton 1975-4-21 9170 Colusa 3.5 miles northwest of Lodoga (by road.) Comment
  CAS-BOT-BC6406  Platystemon californicus Mary Katherine (Mrs.) Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC91595  Platystemon californicus Mrs. Brandegee 1889-4-1 s.n. Colusa Unspecified. 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
  SFV8387  Platystemon californicus L. E. Miller 1973-4-15 12 Colusa Middle of Bear Valley, north of State Highway 20. Roadside. Comment
  UCD14364  Platystemon californicus L. Coats 1983-4-24 15 Colusa Colusa Co.; along Bear Valley Road, 4.3 miles south of Bartlett Springs Road; Comment
  UCD68862  Platystemon californicus G. Robinson 1984-4-21 11 Colusa Bear Valley, California, 30 m. West of Wilbur Springs Road, 3.2 miles North of Highway 20. In valley grasslands - pasture forbs plant association, dominated by composites, on hard, black clay soil, in full sunlight, common in area. Solitary, upright plants. Flowers, yellow-white, 'cream cup. 390 Comment
  UCD82340  Platystemon californicus Robin McMaster 1973-4-15 326 Colusa Bear Valley. Comment
  UCD96037  Platystemon californicus Charles Gasser 1978-4-9 11 Colusa Bear Valley, 8 miles north of the junction of Highway 16 and Highway 20. Comment
  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
  RSA388341  Platystemon californicus var. californicus Linda Bell 1975-4-19 40 Colusa Bear Valley Road, 1 mile north of State Highway 20 Comment
  RSA604107  Platystemon californicus var. californicus Steve Daniel 1986-4-13 10 Colusa Bear Valley, 7.6 miles N of junction of Bear Valley Road and Highway 20 396 Comment
  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
  JEPS87664  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  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
  JEPS95488  Plectritis macrocera Vernon H. Oswald and L. Ahart 1994-4-6 6067 A Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UC1053421  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UCD57103  Plectritis macrocera Gordon Harrington; Diana Hickson 2007-4-7 0016 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UC1543197  Poa Donald G. Nelson et. al. 1940-6-8 687 Colusa e summit of Snow Mt 1981 Comment
  UCR238903  Poa annua George K. Helmkamp, E. A. Helmkamp 2012-2-9 18535 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC254889  Poa bulbosa M. H. Handley 1963-5-1 s.n. Colusa NW of Maxwell 79 Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  CHSC57562  Poa bulbosa Steven Triano 1987-4-4 16 Colusa Salt Canyon, n side of Salt Creek, ca. 40 ft s of Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD160062  Poa bulbosa James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  UCD64275  Poa bulbosa Craig D. Thomsen 2000-3-31 2075 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
  UCD90657  Poa bulbosa Beecher Crampton 1975-4-21 9171 Colusa 3.5 miles northwest of Lodoga. Comment
  SEINET11686444  Poa bulbosa var. vivipara S. M. Leary 1978-1 3 Colusa N side of Salt Creek, S side of Hwy 20, 11 mi WSW of Williams 143 Comment
  UCD163221  Poa secunda Craig D. Thomsen 2000-4-12 2142 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
  UCD163303  Poa secunda Craig D. Thomsen 1997-4-7 1894 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD82731  Poa secunda Craig Thomsen; G. Harrington 2009-5-14 2913 Colusa Colusa County on Walker Ridge: about south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  CHSC112213  Poa secunda subsp. secunda Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18643 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC8244  Poa secunda subsp. secunda J. G. Moore 1969-4-12 2 Colusa Hwy 20, 15 mi. w of Williams on n and s sides of road. 106 Comment
  UCD20204  Poa secunda subsp. secunda J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 16 miles N of junction of Hwys 20 and 16. Comment
  POM62478  Pogogyne douglasii Roxana Stinchfield 1916-7-11 448 Colusa Colusa - Williams Road at Trough Comment
  JEPS62433  Pogogyne douglasii W. L. Jepson 1920-5-23 8966 Colusa near Leesville, foot of Bartlett grade, west side of Bear Valley, w Colusa Co. Comment
  CHSC71641  Pogogyne zizyphoroides Michael A. Wolder 1988-5-12 Colusa Colusa National Wildlife Refuge south west of Colusa. At the edge of a seasonal wetland in Tract 20, Cell 1. 16 Comment
  JEPS104398  Polygonum amphibium var. emersum Lowell Ahart 2003-10-23 10656 Colusa In East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  CAS-BOT-BC413966  Polygonum aviculare subsp. aviculare Karl H. Rechinger 1953-4-11 s.n. Colusa 3 miles east of Maxwell Comment
  JEPS80124  Polygonum bistortoides L. R. Heckard and J. Hickman 1980-7-1 5282 Colusa cirque between East Peak and West Peak (ca 10 mi w of Stonyford); Snow Mt. 2042 Comment
  JEPS81372  Polygonum davisiae L. R. Heckard and J. C. Hickman 1982-7-8 5983 Colusa just n summit marker (West Peak and Cirque from West Peak); Snow Mt. Comment
  JEPS75842  Polygonum minimum L. R. Heckard 1974-9-10 3902 Colusa West Peak Snow Mt. (ne slope) 2103 Comment
  JEPS80764  Polygonum parryi L. R. Heckard and J. C. Hickman 1981-7-30 5731 Colusa meadow n Trout Creek (se side of mt.); Snow Mt. 1828 Comment
  JEPS110387  Polygonum persicaria Lowell Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  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
  RSA725023  Polypogon maritimus L. Ahart 2006-8-9 13171 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UC821244  Polypogon maritimus Roxana Stinchfield 1916-6-17 287 Colusa near College City (Tule); Tule Comment
  UCD67067  Polypogon maritimus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5095 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  UCD91239  Polypogon monspeliensis A. A. Beetle 1942-5-21 3269 Colusa 12 miles north of Williams. Comment
  UCD91294  Polypogon monspeliensis Beecher Crampton 1958-5-19 4809 Colusa West of Lodoga. Comment
  CHSC116671  Polystichum munitum Lowell Ahart; John Dittes, Joseephine Guardino 2016-2-14 20720 Colusa On the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  SEINET10333351  Populus fremontii R. R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  HSC86897  Populus fremontii subsp. fremontii Anthony J. Desch, Bryon Cariss 1988-4-17 36 Colusa Goat Mountain Rd. 7 mi. W from its junction with Stonyford Rd. Comment
  SEINET3892428  Potamogeton diversifolius G. Harrington, J. Alderson; E. Bayon; R. Willmarth 2008-6-8 5107 Colusa Blm Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon.; 0 511 Comment
  UCD82732  Potentilla Craig Thomsen; G. Harrington 2009-5-14 2911 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS8022  Proboscidea louisianica subsp. louisianica Rimo Bacigalupi with L. R. Heckard 1951-8-6 3471 Colusa 4.6 mi nw Sites (along road between Sites and Lodoga) Comment
  CHSC91164  Prunus virginiana var. demissa D. Isle 2003-6-24 377 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0523825E 4346753N. 1767 Comment
  UCD67072  Pseudognaphalium californicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  SEINET3367922 Image available Pseudognaphalium luteoalbum Richard R. Halse 2012-3-25 8419 Colusa Williams, Weedy area behind the Chinese Restaurant on D street 24 Comment
  CHSC113055  Pseudognaphalium stramineum Lowell Ahart 2013-10-1 19070 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
  CHSC107119  Psilocarphus brevissimus var. brevissimus L. P. Janeway; B. Castro 2011-4-27 10241 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.3 km northeast of Tehama-Colusa Canal. On bare ground in re-vegetating old vehicle tracks through north edge of the marsh. 49 Comment
  UC1073297  Psilocarphus brevissimus var. brevissimus George B. Rossbach 1955-4-9 558 Colusa 2 mi e Maxwell; Sacramento Valley 18 Comment
  CHSC89836  Psilocarphus oregonus B. Castro; L. Janeway, S. Innecken 2001-5-9 1251 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek. 367 Comment
  CAS-BOT-BC361876  Psilocarphus tenellus Roxana S. Ferris 1917-4-12 526 Colusa 4 miles east of Williams Comment
  UC638695  Psilocarphus tenellus Ethel Crum 1938-5-7 2010 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCD163706  Psilocarphus tenellus Craig Thomsen 1999-5-10 2018 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CHSC79691  Psilocarphus tenellus var. tenellus L. P. Janeway; B. Castro 2000-5-1 6687 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  CHSC86029  Psilocarphus tenellus var. tenellus Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  UCD116917  Ptelea crenulata K. Esau; D. Hartmann 1941-7-17 s.n. Colusa Between Williams and Clear Lake, U.S. #20. Comment
  JEPS73504  Pterospora andromedea L. R. Heckard 1972-7-10 3121 A Colusa near Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  CHSC112221  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  HSC83419  Pterostegia drymarioides R. Robichaux 1975-4-20 31 Colusa E of Walker Ridge Rd., 2.5 mi. NNW of intersection with Hwy. 20 747 Comment
  UC1738833  Puccinellia simplex Dean W. Taylor 1988-3-24 9462 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles North of Ware Road 24 Comment
  JEPS80430  Purshia tridentata var. tridentata L. R. Heckard 1974-9-9 3840 A Colusa trail up from Summit Springs; Snow Mt. 1859 Comment
  CAS-BOT-BC462851  Pyrola asarifolia F. P. Cronemiller 1924-6-26 893 Colusa Upper Lotto Meadow 1371 Comment
  JEPS80783  Pyrola dentata L. R. Heckard and J. C. Hickman 1981-7-30 5756 Colusa Trout Creek, southeast side of Snow Mountain 1600 Comment
  JEPS75754  Pyrola dentata L. R. Heckard and R. Bacigalupi 1976-9-6 4436 Colusa East of Trout Creek crossing, Snow Mountain 1859 Comment
  UCD84509  Quercus X morehus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6060 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  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
  UC993118  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UCD55461  Quercus durata Ellen Dean; Gordon Harrington 2006-10-6 3285 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  UCD84510  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6061 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  SEINET13953266 Image available Quercus durata Steven Lagos 1974-1 51 Colusa Wilbur Springs Quad., 3000 ft. 914 Comment
  RSA758621  Quercus lobata George K. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  RSA759171  Quercus lobata Doug Goldman 2004-11-1 2916 Colusa East side of Route 45 (Princeton Road). 23 Comment
  SEINET10881720  Quercus lobata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 908 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W, near edge between sections 4 and 5. 499 Comment
  SFV17753  Quercus palmeri R. Raiche 1990-12-2 s. n. Colusa Acoss Sulphur Creek from Wilber Springs. Comment
  UCD14527  Quercus palmeri Roger Raiche 1990-12-2 D Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD72390  Quercus wislizeni var. frutescens Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5116 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
  CHSC112222  Rafinesquia californica Lowell Ahart 2013-5-1 18670 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
  RSA275336  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  JEPS80085  Ranunculus alismifolius L. R. Heckard with J. Hickman 1979-6-16 5092 Colusa about 1/2 mi s Milk Ranch (nw of West Peak, Snow Mt.) 2011 Comment
  JEPS83801  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  UCD66942  Ranunculus aquatilis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5091 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  POM312419  Ranunculus bongardii G. Thomas Robbins, S. Galen Smith 1950-4-15 1907 Colusa Colusa County: In wet mud and vernal pool, Bear Valley Comment
  UCR206394  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14373 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  SEINET4208544  Ranunculus canus var. canus Richard R. Halse 2013-3-26 8740 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams.; 0 157 Comment
  CHSC62943  Ranunculus hebecarpus Vernon H. Oswald; Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 463 Comment
  UC72903  Ranunculus hebecarpus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD97128  Ranunculus hebecarpus Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6912 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  HSC72770  Ranunculus hebecarpus J. Krajanowski 1981-4-4 2 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 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
  UCD163875  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2453 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  UCD65635  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2141 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD82500  Ranunculus occidentalis Craig Thomsen; G. Harrington 2009-5-12 2859 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD83757  Ranunculus occidentalis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5953 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  UC118332  Ranunculus occidentalis T. S. Brandegee April 1889 Colusa mountains Comment
  UCD97060  Ranunculus orthorhynchus var. bloomeri Clinton C. Shock 1980-5-3 62 Colusa Bear Valley, ca. 12 miles north west of State Highway 20. 384 Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  UCR206694  Raphanus raphanistrum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14364 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCD13218  Raphanus sativus Steve Daniel 1986-4-13 9 Colusa California: Colusa Co. Bear Valley, 7.6 mi N of hwy 20 along Bear Valley rd. elev. ca. 1300 ft. 396 Comment
  JEPS75868  Rhamnus californica L. R. Heckard 1974-9-10 3880 Colusa East Circle Trail, along spur running se from the w peak, Snow Mt. Snow Mt. 2011 Comment
  SEINET13946282 Image available Rhamnus californica A. A. Heller 1916-1 12360 Colusa Coast Range on the grade about 3 mi W of Leesville Comment
  JEPS2828 Image available Rhamnus californica var. crassifolia W. L. Jepson 1920-5-23 8974 Colusa ridge w Bear Valley; ; W of Bear Valley, Colusa Co. Comment
  CDA16114  Rhamnus tomentella subsp. crassifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15239 Colusa North Coast Ranges; Along Little Stony Creek. 0 Comment
  CHSC105169  Rhamnus tomentella subsp. crassifolia B. Castro; L. P. Janeway 1999-7-5 1014 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  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
  JEPS42073  Rhamnus tomentella subsp. crassifolia J. D. Coffman 1923-6-4 Colusa betw Leesville and Bartlett Sprs; <Briona Hill?> Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  CDA40545  Rhamnus tomentella subsp. crassifolia P. S. Crane 1979-8-14 s.n. Colusa 4 miles west of Ladoga Road on Goat Mountain. 0 Comment
  JEPS41974  Rhamnus tomentella subsp. tomentella W. L. Jepson 1934-7-28 16746 Colusa hills near Cortina Valley; Inner North Coast Range Comment
  UCD117941  Rhododendron occidentale George F. Hrusa 1989-5-5 6066 Colusa Open margin of Little Stony Creek, along Rd. to Cedar Camp. 1.5 m. SW of intersection of Stonyford-Lodoga Rd. 470 Comment
  HSC62926  Rhus aromatica Marla J. Carollo 1979-4-14 26 Colusa Buch Flat on Walker Ridge Rd. 884 Comment
  UCD57304  Rhus aromatica Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3675 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 366 Comment
  UCSB26060  Rhus aromatica Belshaw, Charles 1937-4-25 Colusa Cooks Springs Comment
  JEPS66281  Rhus trilobata W. L. Jepson 1932-5-8 16295 Colusa n of Stonyford 365 Comment
  JEPS15562  Ribes lobbii G. Thomas Robbins with L. R. Heckard 1956-7-25 3718 Colusa about 50 yards below summit Snow Mt. West (ridge between east and west peaks of Snow Mt.); Snow Mt. 2133 Comment
  JEPS75751  Ribes lobbii L. R. Heckard and R. Bacigalupi 1976-9-6 4432 Colusa just w Fouts Camp; Snow Mt. 1859 Comment
  HSC44275  Ribes malvaceum Barbara Kelly 362 Colusa 1 mi.. from intersection of Bartlett Springs Rd. and Grapevine Spring Rd. on Walker Ridge Rd. Comment
  UCD102432  Ribes quercetorum Mr. A. Jones 1934-2-11 s.n. Colusa Above Williams. Comment
  JEPS75851  Ribes roezlii var. cruentum L. R. Heckard 1974-9-10 3897 Colusa e slope East Peak; Snow Mt. 2103 Comment
  CHSC27584  Rigiopappus leptocladus Timothy Spira; Robert Schlising 1978-5-13 3238 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC94628  Rigiopappus leptocladus Lowell Ahart 2006-6-11 12666 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
  UC1613352  Rigiopappus leptocladus Charles M. Belshaw 1937-4-1 2878 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD163224  Rigiopappus leptocladus Craig D. Thomsen 2000-3-31 2116 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD57298  Rigiopappus leptocladus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3669 Colusa BLM Payne Ranch. Near junction of Craig and Thompson Canyons. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Upslope of unimproved road, above side branch of Craig Canyon, downslope of saddle separating Craig and Thompson Canyons. 370 Comment
  UCR212316  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS80886  Rorippa curvipes var. truncata L. R. Heckard and J. C. Hickman 1981-7-30 5733 Colusa Trout Creek crossing se side Snow Mountain, Trout Creek crossing (se side Snow Mt.) 1828 Comment
  CHSC84969  Rorippa curvisiliqua var. orientalis Lowell Ahart 2003-10-23 10664 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC84962  Rosa californica Lowell Ahart 2003-10-23 10677 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS104207  Rosa californica Lowell Ahart 2003-10-23 10677 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS104208  Rosa californica Lowell Ahart 2003-7-14 10389 Colusa On the w side of Bear Valley Rd, ca 1/4 mi n of the intersection of Bear Valley Rd and Wilber Springs Rd and bridge. 379 Comment
  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
  SEINET3450732  Rosa multiflora Unknown 2003-7-14 10389 Colusa North of Arbuckle, North of Arbuckle, west side of Bear Valley Road, about 0.25 miles north of the intersection of Bear Valley Road and Wilber Springs Road and bridge 370 Comment
  UC1101416  Rotala ramosior Malcolm A. Nobs, S. Galen Smith 1949-7-18 1008 Colusa 2.5 mi w of Williams Comment
  CAS-BOT-BC433469  Rumex dentatus Roxana S. Ferris 1926-4-21 6285 Colusa 3 miles west of Colusa 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
  JEPS80761  Sagina saginoides L. R. Heckard and J. C. Hickman 1981-7-30 5728 Colusa s.e. side Snow Mt. (Trout Creek crossing) 1828 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
  UCD138022  Sagittaria longiloba June McCaskill 1954-8-9 367 Colusa Grimes - Knights Landing Highway, ca. 3 miles south of Grimes. Comment
  CAS-BOT-BC445794  Sagittaria montevidensis Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa Eight miles north of Colusa Comment
  CHSC78976  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge. 15 Comment
  CAS-BOT-BC102858  Salix breweri C. Hart Merriam 1907-7-23 s.n. Colusa Cook Springs Comment
  CHSC62849  Salix breweri Vernon H. Oswald; Lowell Ahart 1994-3-23 6016 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section of the E side of Frenzel Creek, S of Stonyford. 518 Comment
  CHSC75757  Salix breweri Vernon H. Oswald; Lowell Ahart 1999-6-22 9786 Colusa 1.5 mi west of Stonyford-Lodoga Road 42 paralleling Little Stony Creek. 426 Comment
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCR198139  Salix breweri Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-7-7 3678 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  UCD41161  Salix exigua N. Williams 2002-3-28 148 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  UC1179058  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13159 Colusa ca. 3 mi n.e. Colusa (Butte Sink, along Butte Creek) Comment
  CAS-BOT-BC104037  Salix hindsiana Roxana S. Ferris 1917-4-17 619 Colusa Sycamore Slough Comment
  UCD164153  Salix laevigata Craig Thomsen 1999-4-27 1999 Colusa Bear Creek Canyon. Along Bear Creek, just north of Sulphur Creek confluence, next to Wilbur Bridge. Comment
  UCD84432  Salix laevigata Jack Alderson 2009-4-8 34 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  UCR206356  Salix laevigata George K. Helmkamp, E. A. Helmkamp 2009-3-11 14380 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  JEPS81275  Salix lasiandra var. lasiandra L. R. Heckard and J. C. Hickman 1982-7-5 5885 Colusa s side Snow Mt. (Summit Springs, slope below (s of ) area) 1500 Comment
  CDA16096  Salix lasiolepis G. F. Hrusa 1999-5-16 15047 Colusa North Coast Ranges; Goat Mountain on S side. At intersection of rd to Young's Corral and Goat Mtn Lookout. 1737 Comment
  CHSC96763  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges. UTM 10S, 4346931 N, 0523542 E. Below summit ridge of Goat Mountain on S side. 1722 Comment
  JEPS86636  Salix lasiolepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6686 Colusa sw flank Snow Mt. (n side of West Peak) 2000 Comment
  UCD111629  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Little Stony Creek, Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. 475 Comment
  CAS-BOT-BC107365  Salix lasiolepis var. lasiolepis Roxana S. Ferris 1917-4-17 631 Colusa near Sycamore Comment
  JEPS80820  Salix melanopsis L. R. Heckard and J. C. Hickman 1981-7-31 5791 Colusa e side Snow Mt. (<along> Dark Hollow Creek) 1584 Comment
  CDA20232  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. Area mostly S. tragus. 0 Comment
  CDA37042  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. 0 Comment
  CHSC78978  Salsola soda Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9978 Colusa Delevan National Wildlife Refuge. Adjecent to the main refuge road 0.2 mi north of Maxwell-Colusa Rd. 18 Comment
  SEINET12765122  Salsola soda Lowell Ahart 2006-9-26 13348 Colusa Between the deep ditch and 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.; 0 24 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
  UC596149  Salvia columbariae R. F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  UCD163337  Salvia columbariae Craig D. Thomsen 2009-5-3 2808 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCLA70201  Salvia columbariae Robert F. Hoover 1938-4-24 3228 Colusa ridge between Venado and 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
  UCD70242  Salvia mellifera D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Open serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CAS-BOT-BC238629  Sambucus nigra subsp. caerulea Roxana S. Ferris 1917-4-15 622 Colusa Sacramento River levee near Sycamore Slough Comment
  UC106104  Sanicula bipinnatifida T. Brandegee March 1889 Colusa Leesville Comment
  UCD82459  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC89863  Sanicula crassicaulis B. Castro; L. P. Janeway 2001-4-19 1232 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. In riparian corridor along dirt road adjacent to perennial N-S-trending creek. 277 Comment
  UCD66530  Sanicula crassicaulis Craig D. Thomsen 2000-4-12 2153 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  HSC45685  Scandix pecten-veneris Patricia Shesgreen 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD67087  Schoenoplectus acutus var. occidentalis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5109 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  UCD72538  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3829 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.25 mile downstream of bridge. 251 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  UCD55471  Schoenoplectus pungens var. longispicatus Ellen Dean; Gordon Harrington 2006-10-6 3295 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UC1100922  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12975 Colusa pond 2.7 mi n of Colusa between Sacramento River and Butte Creek; Butte Sink, n of Colusa betw Sacramento River and Butte Cree Comment
  UC1100924  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12964 Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UCD50163  Scirpus pungens D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  JEPS21848  Scribneria bolanderi John R. Swanson 1958-4-26 308 Colusa 1.4 mi w of Bear Valley (on road toward Bartlett Springs) 609 Comment
  UCD83760  Scribneria bolanderi Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5956 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  CHSC75613  Scutellaria californica Vernon H. Oswald; Lowell Ahart 1999-6-22 9775 Colusa West of Stonyford on Fouts Springs Rd. (M10) 0.5 mi east of Dixie Glade Picnic Area. 975 Comment
  JEPS80261  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-15 5441 Colusa n of road at Summit Springs; Snow Mountain, Summit Springs 1524 Comment
  UCD66954  Scutellaria californica Ellen Dean; Davis Botanical Society 2008-5-31 4998 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UCD82582  Scutellaria californica Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2727 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD81728  Scutellaria siphocampyloides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5730 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  SFV10451  Scutellaria tuberosa M. L. Vincent 1968-6-8 779 Colusa Goat Mountain Road, 1 mile from Stanford turnoff. Comment
  JEPS81417  Sedum obtusatum subsp. retusum L. R. Heckard and J. C. Hickman 1982-7-9 6025 Colusa just e of Lookout on Goat Mt. 1859 Comment
  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
  UCD58126  Senecio vulgaris Ellen Dean; PLB 102 Class 2007-4-29 3722 Colusa Payne Ranch. Lands to the SW of the junction of Hwy. 16 and Hwy. 20. Thompson Canyon, near junction with Craig Canyon. Thompson Creek. 362 Comment
  UCD64278  Senecio vulgaris Craig D. Thomsen 2000-3-31 2082 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CDA32942  Senecio vulgaris Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  HSC101845  Setaria parviflora J. P. Smith, J. O. Sawyer 2007-9-2 12411 Colusa River Rd. N of Colusa 20 Comment
  CAS-BOT-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  RSA725026  Setaria viridis L. Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD81249  Sherardia arvensis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5413 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located south of Brophy Canyon. 375 Comment
  HSC46128  Sidalcea calycosa subsp. calycosa J. P. Smith, Thomas W. Nelson 1976-4-14 8582 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  JEPS120911  Sidalcea diploscypha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18647 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UC108880  Sidalcea diploscypha Mrs. K. Brandegee Colusa Mountain House 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
  OBI30253  Sidalcea diploscypha Chris M. Johnson 1970-5-8 A 19 a Colusa At the jctn of hwys 16 and 20 335 Comment
  UCD116642  Sidalcea diploscypha Nancy Vucinich 1978-5-6 20 Colusa 2.5 miles north of the junction of Highway 16 and Highway 20. 365 Comment
  JEPS50060  Sidalcea hartwegii Alice King May 1906 Colusa College City Comment
  CHSC110124  Sidalcea keckii L. P. Janeway 2011-5-11 10279 Colusa Inner North Coast Ranges. Southeast side of East Park Reservoir, recreation and camping area; 1.4 km north of Sites-Lodoga Road. 373 Comment
  JEPS105737  Sidalcea keckii David Gowen 2004-5-18 84 Colusa About 1.5 miles south of Stonyford. Road shoulder on the east side. Comment
  JEPS50071  Sidalcea keckii W. L. Jepson 1932-5-7 16260 Colusa valley 2 mi above Venado (w Colusa Co.); Venado (valley 2 mi above) Comment
  JEPS123189  Sidalcea keckii David Gowen 2009-5-6 1014 Colusa Eastside of Hwy 20, about 16 miles west of Williams, near milepost 6.42 (from county line?). Comment
  UC767046  Silene antirrhina R. F. Hoover 1938-4-24 3215 Colusa Sand Creek foothills w Arbuckle; Sand Creek foothills w of Arbuckle Comment
  UC583287  Silene californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi nw Rumsey; nw of Rumsey 304 Comment
  UC852801  Silene californica A. A. Heller 1937-4-24 15351 Colusa on Highway #20, 15 mi w Williams; w of Williams Comment
  POM914478  Silene californica L. S. Rose 1936-4-27 36179 Colusa 11 miles NW of Rumsey. 305 Comment
  SD72209  Silene californica Eugene Memmler 1969-5-8 102 Colusa Valley side of coastal hills between Williams and Clear Lake, Highway 20. 149 Comment
  UC1299502  Silene campanulata Freed W. Hoffman 1947-6-19 1674 Colusa Cooks Springs North Coast Ranges, Cooks Springs Comment
  UCD111674  Silene campanulata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  JEPS86785  Silene campanulata subsp. campanulata Craig D. Thompson 1989-6-3 1564 Colusa ca 1/2 mi e Cook Springs; e of Cook Springs Comment
  CDA12223  Silene campanulata subsp. glandulosa G. F. Hrusa 1993-5-2 10861 Colusa Frenzel Creek Research Natural Area; Mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  CAS-BOT-BC388982  Silene laciniata subsp. californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi. NW. of Rumsey 304 Comment
  CHSC27734  Silene laciniata subsp. californica W. K. Cheechov 1978-4-9 8 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  UCD98993  Silene laciniata subsp. californica Cherry Kline 1964-5-2 51 Colusa Bear Creek Canyon, 3 miles north of the Wilbur Springs turnoff on State Highway 20. Comment
  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
  UCR238925  Sinapis alba George K. Helmkamp, E. A. Helmkamp 2012-2-9 18530 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  HSC72140  Sinapis arvensis J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9572 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD72467  Sinapis arvensis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3801 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  SEINET11094167  Sinapis arvensis Unknown 2010-3-20 7826 Colusa Flora of California, USA. Colusa Co., California. Along State Hwy. 20 ca. 5.4 miles west of Colusa (Junction of State Hwys. 20 & 45) elev. 17 m. 39.19004d N 122.10456d W WGS84 Habitat: Weedy roadside ditch. Flowers bright yellow; plants to 1.2 meters tall. 17 Comment
  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
  CHSC114941  Sisyrinchium bellum Lowell Ahart 2015-4-10 20012 Colusa In a small meadow, on the south side of Brim Road, about 2 miles west of the intersection of Bear ValleyRoad and Brim Road, about 17 miles (air) west of Williams. Meadow in Chaparral. 500 Comment
  HSC31314  Sisyrinchium bellum Carter Schleicher 1974-5-4 27 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  HSC31401  Sisyrinchium bellum Maralyn O'Meara, Gary S. Lester 1974-5-4 349 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  RSA0115083  Sisyrinchium bellum Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18644 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  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
  POM62090  Solanum americanum Roxana Stinchfield 1916-7-7 385 Colusa Sycamore Slough bed. Stinchfield Ranch. Comment
  CDA33581  Solanum elaeagnifolium Robin Breckenridge 2010-8-17 PDR# 1313487 Colusa Interstate 5 north, 1 mile before Hahn Rd. exit. 0 Comment
  NY821006  Solanum nodiflorum R. J. Stinchfield 1916-7-7 385 Colusa Stinchfield Ranch. Sycamore Slough bed Comment
  UCD57832  Solanum parishii Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 38 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (going roughly west) from Road Kill Cafe, about 1/2 mile upstream from the breached dam. 398 Comment
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May 13 2013
  CDA32822  Solanum parishii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC94521  Solanum physalifolium var. nitidibaccatum Lowell Ahart 2006-8-22 13223 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CDA6240  Solanum pseudocapsicum M. H. Handley 1961-7-24 Colusa 0 Comment
  NY723192  Solanum rostratum L. Ahart 1980-6-11 2370 Colusa 9¼ miles north of Colusa 35 Comment
  CDA15549  Solidago californica G. F. Hrusa 1998-10-28 14900 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  CHSC101399  Solidago elongata David Isle 2001-7-26 1576 Colusa SW side of Letts Lake; N of day use area; N of trail between swamp thistle and tule patch. 1377 Comment
  UCD55462  Solidago velutina subsp. californica Ellen Dean; Gordon Harrington 2006-10-6 3286 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  CDA32941  Sonchus oleraceus Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  CAS-BOT-BC235305  Sorghum halepense Roxana Stinchfield 1918-7-9 408 Colusa Phillips ranch near Sycamore Comment
  POM313124  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa Below caus[e]way 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
  CAS-BOT-BC390067  Spergularia atrosperma Roxana S. Ferris 1917-4-12 509 Colusa 4 miles East of Williams Comment
  CHSC29847  Spergularia macrotheca var. leucantha K. R. Stern 1980-6-30 6658 Colusa Vernal pool area, south border Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC390760  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  CAS-BOT-BC390763  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  JEPS89204  Sphenosciadium capitellatum L. R. Heckard and J. C. Hickman 1981-7-31 5793 Colusa e side Snow Mt. (Dark Hollow Creek); e side of Snow Mt., Dark Hollow Creek 1584 Comment
  CDA41022  Stachys ajugoides var. ajugoides D. Brown 1972-6-16 s.n. Colusa Geo. Lodi Prop., Grimes. 0 Comment
  CHSC94482  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13118 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC84233  Stachys albens Lowell Ahart 2003-7-14 10381 A 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
  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
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  JEPS80121  Stellaria calycantha L. R. Heckard with J. Hickman 1980-7-1 5277 Colusa ca 10 mi w Stonyford (Snow Mt., cirque between East and West Peaks); Snow Mt. 2042 Comment
  CHSC62885  Stellaria media Vernon H. Oswald 1994-3-14 5991 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, between Cell 1, Tract 38 and Tract 41. Along the side of a levee road. 25 Comment
  CAS-BOT-BC386948  Stellaria media Roxana S. Ferris 1917-4-17 610 Colusa Sycamore Slough Comment
  UCD65628  Stellaria nitens Craig D. Thomsen 2000-4-12 2128 -b 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
  CHSC94466  Stellaria pallida Lowell Ahart 2006-8-9 13165 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS80756  Stephanomeria lactucina L. R. Heckard and J. C. Hickman 1981-7-29 5723 Colusa spur about 1 km se Summit Springs (s side of Snow Mt.); Snow Mt. 1554 Comment
  CHSC79695  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner Coast Ranges. Along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  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
  UCD61478  Stephanomeria virgata subsp. pleurocarpa Ellen Dean; Gordon Harrington 2006-10-6 3272 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
  CHSC91026  Streptanthus D. Isle 2003-6-10 360 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. GPS: 10S 0526306E 4345340N. 1365 Comment
  UCD111679  Streptanthus Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  UCD167943  Streptanthus James Neilson 1982-7-1 4091 a Colusa Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  CHSC107538  Streptanthus breweri G. F. Hrusa 1998-6-19 14600 Colusa North Coast Ranges. Roadcut above Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. 415 Comment
  UC1733757  Streptanthus breweri Kay H. Beach 1940-5-16 1258 Colusa Colusa and Lake county line Comment
  UCD115959  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD164311  Streptanthus breweri Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 553253, 4318610. [UTM coordinates place this location along Bear Valley Rd., north of HWY 20.] 381 Comment
  CAS-BOT-BC61236  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  UC1292771  Streptanthus breweri Freed W. Hoffman 2784 Colusa N of road from Leesville to Bartlett Springs, along the summit between Colusa and Lake counties Comment
  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
  UC956620  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 2289 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 Comment