Search Results — 2000 specimen records retrieved (1627 records with coordinates)
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  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
  IRVC29682  Abies magnifica var. shastensis Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5036 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  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
  UCD80834  Acer macrophyllum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5291 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Canyon to the north of Brophy Canyon. 239 Comment
  CAS-BOT-BC334176  Acer negundo var. californicum Roxana S. Ferris 1926-4-22 6301 Colusa near Sycamore Comment
  HSC45700  Achillea millefolium Sheila Logan 1978-4-22 62 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS73474  Achillea millefolium L. R. Heckard 1972-7-9 3083 Colusa along trail from Frog Pond to Milk Ranch Frog Pond; Snow Mt. (southern range extension) 1950 Comment
  JEPS80821  Achillea millefolium L. R. Heckard and J. C. Hickman 1981-7-31 5792 Colusa along, on east side of Snow Mt. Dark Hollow Creek; Snow Mt. 1584 Comment
  UCD82114  Achillea millefolium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5642 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS75875  Achnatherum lemmonii L. R. Heckard 1974-9-11 3946 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  CHSC32199  Achnatherum occidentale subsp. californicum James D. Jokerst 1980-8-8 1082 Colusa North Coast Ranges. Near Snow Mountain (West). 2133 Comment
  CHSC92665  Achnatherum occidentale subsp. californicum D. Isle 2005-9-14 1175 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 1/2 mile SE of Box Spring Trail junction on Overlook Trail. 1895 Comment
  CAS-BOT-BC29877  Achyrachaena mollis B. Ellyson; J. Hooke; D. Newman 1996-5-4 40 Colusa Bear Valley, Leesville, 1.3 mi. south fo Brim Road on Bear Valley Road; 14.7 mi. on Walker Ridge Road 414 Comment
  CHSC27825  Achyrachaena mollis K. D. Whitney 1978-4-8 32 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  HSC92503  Achyrachaena mollis S. Morrissette, J. Williams & K. Kopper 1994-4-24 24 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  JEPS36738  Achyrachaena mollis W. L. Jepson 1932-5-8 16285 Colusa Stonyford 365 Comment
  POM52917  Achyrachaena mollis Roxana S. Ferris 1917-4-12 s.n. 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
  CHSC77336  Acmispon americanus var. americanus Heidi West; Joyces Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  UCD64035  Acmispon americanus var. americanus Craig D. Thomsen 2000-6-23 2413 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCD56902  Acmispon brachycarpus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3505 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  UCD66693  Acmispon brachycarpus Craig D. Thomsen 2000-6-23 2376 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  HSC94147  Acmispon grandiflorus G. Fred Hrusa 1998-6-19 14638 Colusa Below Fouts Springs on Fouts Springs Rd. to Stonyford. 675 Comment
  SEINET957367  Acmispon grandiflorus L. R. Heckard 1969-1 2240 Colusa On 14960 burn. 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). 1128 Comment
  UCR261743  Acmispon rubriflorus Ann Howald 2003-6-9 2365 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, at Sleepy Hollow camping area 378 Comment
  UCD163209  Acmispon wrangelianus Craig D. Thomsen 2000-4-28 2200 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
  UCD163318  Acmispon wrangelianus Craig D. Thomsen 1997-4-20 1916 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD163704  Acmispon wrangelianus Craig Thomsen 1999-5-10 2016 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  UCD82126  Acmispon wrangelianus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5655 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
  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
  UCD104559  Acmispon wrangelianus W. Williams 1951-1 s.n. Colusa Yolo County border. Hwy 16, Bear Creek Valley. Comment
  CAS-BOT-BC29713  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  UCD13213  Adenostoma fasciculatum Charles Martin 1986-5-17 27 Colusa Along Sites-Lodoga Road, ca. 8.2 miles W of Sites, on roadside. Comment
  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
  JEPS121107  Adiantum jordanii Lowell Ahart 2013-5-1 18674 Colusa On thesouth side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD56913  Adiantum jordanii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3516 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 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
  SFV15096  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
  UCD104593  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  UCD81226  Aesculus californica Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5563 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Canyon to the south of Destanella Flat. 446 Comment
  JEPS81298  Agastache urticifolia L. R. Heckard and J. C. Hickman 1982-7-5 5912 Colusa s side Snow Mt. (along streamlet below Summit Springs); s side of Snow Mt. 1524 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
  UCD57716  Agoseris grandiflora Jordan Thompson; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. North side of Craig Creek on south side of unimproved road. 335 Comment
  UCD82115  Agoseris grandiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5643 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS80139  Agoseris grandiflora var. grandiflora L. R. Heckard with J. Hickman 1980-7-2 5299 Colusa ca 10 mi w, above Summit Spring entrance to Snow Mt trail Stonyford; Snow Mt. 1630 Comment
  CHSC27803  Agoseris heterophylla K. D. Whitney 1978-4-8 23 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
  CHSC56745  Agoseris heterophylla Ginger S. Gough 1989-4-1 7 Colusa Ca. 0.48km W of jct of Hwys 20 and 16, S side of Bear Creek, ca. 29km SW of Williams. 322 Comment
  HSC72163  Agoseris heterophylla J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9538 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  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
  OBI49665  Agoseris heterophylla var. cryptopleura A. Liston, M. Blumler 1987-4-26 667 -2 Colusa Bear Valley, Lodoga Rd, 6.6 mi S of Bartlett Springs jct Comment
  POM292576  Agoseris heterophylla var. heterophylla Lyman Benson 1933-4-16 4328 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  JEPS51468  Agrostemma githago Alice King 1906-1 Colusa Arbuckle near College City Comment
  JEPS75880  Agrostis alba L. R. Heckard 1974-9-9 3851 Colusa just se Foutch Camp; Snow Mt. 1889 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
  JEPS73446  Agrostis variabilis L. R. Heckard 1972-7-8 3043 Colusa on ridge running se West Peak, Snow Mt. (on n side) 2011 Comment
  CHSC94280  Agrostis viridis Lowell Ahart 2006-8-9 13111 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110386  Agrostis viridis Lowell Ahart 2006-8-9 13159 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC86116  Aira caryophyllea Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. In vernal pools. 91 Comment
  UCD137914  Alisma lanceolatum Herbert L. Mason 1946-9-5 13119 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  UCR200661  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch, c. 0.25 mi. south of intersection between Hwy 16 and Hwy 20, near confluence of Hamilton Flat and Jackson Canyon drainages, c. 10 meters east of Bear Creek, west of Hwy 16 Comment
  UCD82470  Allium Craig Thomsen; G. Harrington 2009-5-12 2847 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 707 Comment
  CAS-BOT-BC459583  Allium amplectens Katherine Esau 1934-5-5 s.n. Colusa Wilbur Springs Quad., Near Rail Canyon Comment
  CAS-BOT-BC459584  Allium amplectens James Jokerst 1985-4-4 2199 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
  JEPS56351  Allium amplectens W. L. Jepson 1932-5-8 16272 Colusa Lodoga 457 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
  UCD163212  Allium amplectens Craig D. Thomsen 2000-4-28 2198 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
  UCD82390  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2832 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  CAS-BOT-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford Comment
  UC1561213  Allium bolanderi Barbara Ertter 1989-7-1 8619 Colusa road to Goat Mt. Lookout 0.4 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk. Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1371 Comment
  UCD141843  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  CDA15775  Allium falcifolium G. F. Hrusa 1993-5-2 10852 Colusa North Coast Ranges; Frenzel Creek Research Natural Area - Mendocino National Forest. Lower Frenzel Creek, tributary of Little Stony Creek. Comment
  POM174570  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford. Comment
  RSA256672  Allium falcifolium J. L. Hobson 1974-5-4 57 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 Comment
  UCD141835  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  SEINET12043975  Allium fimbriatum A. Eastwood, Howell, J. T. 1938-1 5626 Colusa Lake-- Colusa county line on road to Williams Comment
  UC2014135  Allium fimbriatum subsp. purdyi Michele Lanctot with Plant Biology 102 2007-4-29 2 Colusa Colusa County: Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. Comment
  CHSC112220  Allium fimbriatum var. purdyi Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS120995  Allium fimbriatum var. purdyi Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18641 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  RSA296770  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd. , 2 miles form jct with Hwy 20. 366 Comment
  UCD163228  Allium fimbriatum var. purdyi Craig D. Thomsen 2001-5-24 2511 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66711  Allium fimbriatum var. purdyi Craig D. Thomsen 2001-5-24 2536 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
  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
  UCD82740  Allium fimbriatum var. purdyi Craig Thomsen; G. Harrington 2009-5-14 2921 Colusa Colusa County on Walker Ridge: southeast of Methany flat. 579 Comment
  UCR198144  Allium fimbriatum var. purdyi Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3672 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  UCR80282  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Road c. 2 mi from the junction w/ State Route 20. 366 Comment
  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
  CHSC86119  Allium serra Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 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
  UCD57665  Allium serra Erica A. Smith; 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/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  CAS-BOT-BC475542  Allium serra Roxana S. Ferris 1926-4-23 6584 Colusa Field 2 miles from Stonyford Comment
  CAS-BOT-BC475544  Allium serra Roxana S. Ferris 1926-4-23 6429 Colusa Summit of grade on Williams-Stonyford Road Comment
  CDA39419  Allium serra Vernon H. Oswald & Lowell Ahart 1998-5-7 8992 Colusa Lodoga-Leesville Road 4.3 miles south of Cooks Springs Rd. 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
  SEINET3880036  Allium serra D. W. McNeal 1988-3-31 3241 Colusa Dry clay soil on a grassy road bank above Hwy #116, 3.3 mi S of the jct. of Hwy #20.; 0 Comment
  UCD141815  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mile toward Clear Lake from junction of California Highway # 16 and # 20. Comment
  UCD141825  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  CHSC90778  Allophyllum divaricatum D. Isle 2002-4-18 182 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, no. of Fouts Springs. 548 Comment
  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
  UCD82489  Allophyllum gilioides Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 853 Comment
  UCD118016  Allophyllum gilioides Glen Holstein 1978-4-15 s.n. Colusa Along Bear Valley Road near Trout Creek bridge, Bear Valley. 402 Comment
  CHSC86527  Allophyllum gilioides subsp. violaceum B. Castro 2003-3-18 1387 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 228 Comment
  CDA12377  Alnus rhombifolia G. F. Hrusa 1996-1-2 12630 Colusa Inner North Coast Ranges; Little Stony Creek, +/- 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  UCD110026  Alnus rhombifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 128 Comment
  CHSC71667  Alopecurus saccatus Michael A. Wolder 1998-5-12 Colusa Sacramento National Wildlife Refuge Complex. Colusa National Wildlife Refuge south west of Colusa. 16 Comment
  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
  UCR201557  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14271 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  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
  UCD39269  Amaranthus palmeri B. Crampton 1958-6-26 4973 Colusa Grieve road just n.e. of Hershy R.R. siding, 5.5 miles south of College City, Colusa County. Comment
  RSA718532  Ambrosia psilostachya L. Ahart 2006-10-31 13518 Colusa 20 yards northeast of the bridge across Stony creek, just north of Stonyford. 348 Comment
  JEPS80058  Amelanchier utahensis L. R. Heckard with J. Hickman 1979-6-15 5058 Colusa n of West Peak, Snow Mt. (along e trail from Frog Camp to Saddle, Snow Mt); Snow Mt. 2072 Comment
  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
  UC1093628  Amsinckia intermedia Francia Chisaki, Gene B. Newcomb 1958-4-1 1100 Colusa on road to Lodoga (6.6 mi n of junction with Hwy 20) Comment
  POM287422  Amsinckia intermedia Lyman Benson 1935-3-27 6331 Colusa 6 miles west of Williams. 213 Comment
  SEINET12519076  Amsinckia intermedia Christine Laning 1973-1 108 -14 Colusa 10.0 miles northwest of Rumsey on Route 16, near Yolo/Colusa county line. Comment
  CHSC117804  Amsinckia lunaris Jake Schweitzer 2010-4-1 Colusa Inner North Coast Rnages. On BLM parcel, approx. 265 m W of Walker Ridge Road (Bartlett Springs Rd on some maps) 120 m SE of Til Jones Spring. 853 Comment
  CHSC86518  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1397 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 277 Comment
  UC762196  Amsinckia lunaris R. F. Hoover 1938-4-23 3204 Colusa grade on Rumsey-Arbuckle Road Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  RSA0089732  Amsinckia lunaris B. Castro 2003-3-18 1384 -a Colusa Vicinity of Sites (Offstream Storage Investigation: Sites S. Bridge road route), hills N of the Sites-Lodoga Road, and Stone Corral Creek. 198 Comment
  CHSC86528  Amsinckia lycopsoides B. Castro 2003-3-18 1386 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 265 Comment
  RSA0089738  Amsinckia lycopsoides Roxana S. Ferris 1926-4-23 6414 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UC78236  Amsinckia tessellata var. gloriosa K. Brandegee May 1884 Colusa Mountain House; North Coast Ranges Comment
Read comments
Jun 20 2007
  CAS-BOT-BC45252  Ancistrocarphus filagineus Lewis S. Rose 1936-4-27 36187 Colusa 15 miles NW of Rumsey 304 Comment
  JEPS120971  Ancistrocarphus filagineus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18626 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
  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
  UC1111603  Ancistrocarphus filagineus Herbert L. Mason 1941-4-5 12406 Colusa 3 mi s Stonyford Comment
  UC1613346  Ancistrocarphus filagineus Charles M. Belshaw 1937-4-1 2832 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Ranges, Devil's Ridge Comment
  RSA256677  Ancistrocarphus filagineus J. L. Hobson 1974-5-4 63 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 Comment
  CHSC86874  Androsace elongata subsp. acuta B. Castro 2003-4-1 1409 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, on low N-facing cutbank of dirt road which contours along hillside. 280 Comment
  JEPS91078  Androsace elongata subsp. acuta Dean W. Taylor 1992-4-16 12401 Colusa hillsides 0.4 mi due w from spillway into Little Stony Creek (Inner North Coast Ranges, East Park Reservoir); Inner North Coast Ranges, East Park Reservoir 411 Comment
  CDA16107  Angelica tomentosa G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15246 Colusa North Coast Ranges; Little Stony Creek, approx. 1.5 mi. NE of Stonyford-Lodoga Rd. intersection. Sheet 1 of 2 350 Comment
  CHSC32214  Antennaria geyeri James Jokerst 1980-8-6 1060 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  UCD163218  Anthemis cotula Craig D. Thomsen 2000-5-11 2325 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  JEPS127575  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Ranges: ~4 miles W of Stonyford; SE of curve at culvert crossing just E of old dumpsite road junction; uphill ~200' S of 18N01 in 2012 Mill Fire area chaparral. (Gilmore Peak 7.5' Quad.) Comment
  CHSC115752  Antirrhinum virga David Isle 2015-6-20 2157 Colusa 10S -0533568E, 4357508N). North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill 200' S of 18N01 in 2012 Mill Fire area chaparral. N aspect, chamise chaparral; 50-80' above Quercus berberidifolia and #156 RIMA GPS. 439 Comment
  CHSC79436  Apiastrum angustifolium B. Castro; L. P. Janeway 2000-5-2 1115 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD170128  Apiastrum angustifolium Jack Alderson 2016-5-1 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 2400 feet (730 m) west of the confluence of Brophy Creek with Bear Creek. 341 Comment
  IRVC29688  Apocynum androsaemifolium Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5030 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
  CHSC79441  Apocynum cannabinum B. Castro; L. P. Janeway 2000-5-1 1105 a Colusa Vicinity of Sites, Pence Mtn, and Grapevine Creek. 335 Comment
  UCD23339  Aquilegia eximia A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Partly shaded serpentine riparian habitat. 475 Comment
  HSC96752  Arceuthobium campylopodum J. Carey, A. Hong, J. Leffingwell 1995-4-1 22 Colusa Walker Ridge Rd., 0.9 mi. NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek 793 Comment
  UC1078808  Arceuthobium campylopodum Job Kuijt 1957-4-30 1278 Colusa 1/2 mi towards Stonyford (blew the Old Mill Campground on the Stonyford Upper Lake Rd) 1127 Comment
  RSA96755  Arctostaphylos canescens subsp. canescens P. C. Everett, E. K. Balls, George B. Everett 1954-10-17 20335 Colusa 2 miles SW of Trough Springs on road to Upper Lake from Stonyford. 1037 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
  CAS-BOT-BC240291  Arctostaphylos manzanita Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6080 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 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
  SD53207  Arctostaphylos manzanita Darley F. Howe 1962-5-19 3285 Colusa 11 miles west of Williams on Highway 20. 149 Comment
  UCD52157  Arctostaphylos manzanita G. F. Hrusa 1989-2-7 5807 Colusa Road to Cedar Mtn., along Little Stony Creek, approx. 3 miles above junction with Stonyford-Lodoga Rd. 425 Comment
  SEINET11989687  Arctostaphylos manzanita R. A. DeMartile 1982-1 s.n. Colusa between Sites & Ladoga 244 Comment
  CHSC92611  Arctostaphylos manzanita subsp. elegans D. Isle 2005-7-14 1152 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Boardcamp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  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-BC24380  Arctostaphylos manzanita subsp. manzanita Roxana S. Ferris 1926-4-23 6592 Colusa Near Stonyford. Comment
  UCR206665  Arctostaphylos manzanita subsp. manzanita George K. Helmkamp, E. A. Helmkamp 2009-3-17 14395 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  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
  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
  UCD15253  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  UCD163861  Arctostaphylos viscida Craig D. Thomsen 2001-5-31 2543 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  JEPS87754  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
  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
  SEINET5731548 Image available Arctostaphylos viscida subsp. pulchella Bruce Hartsough 1973-1 17 Colusa 7 mi. N of Hwy 20 on Walker Ridge Rd. 853 Comment
  SBBG25408  Arctostaphylos viscida subsp. viscida R. Gankin 1958-4-26 292 Colusa Leesville-Bartlett Springs Rd, ca. 2 mi W of jct of this rd and Leesville-Wilbur Springs Rd, near Colusa-Lake County line Comment
  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
  POM257214  Argemone munita subsp. rotundata Lincoln Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station 549 Comment
  SEINET3296895 Image available Argemone platyceras var. hispida L. Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station, Inner North Coast Ranges. 549 Comment
  UCD56859  Aristida ternipes var. gentilis L. T. Burcham 1955-7-5 317 Colusa 10 miles west of Williams. 121 Comment
  CHSC86126  Aristida ternipes var. hamulosa Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  CHSC86865  Aristida ternipes var. hamulosa B. Castro 2003-3-28 1405 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 182 Comment
  CAS-BOT-BC400399  Aristolochia californica Roxana S. Ferris 1926-4-22 6308 Colusa Sycamore Slough near Sycamore Comment
  POM163496  Aristolochia californica Roxana S. Ferris 1926-4-22 s.n. Colusa Sycamore Slough near Sycamore Comment
  POM165698  Aristolochia californica Roxana S. Ferris 1917-4-15 s.n. Colusa Sycamore Slough Comment
  RSA537715  Arnica discoidea Barbara Ertter 1989-7-1 8594 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  CAS-BOT-BC82672  Arnica longifolia G. Thomas Robbins; L. R. Heckard 1956-7-25 3712 Colusa Along edge of Dark Hollow Creek (a tributary of Middle Fork Stony Creek), on southern flank of Snow Mt. East, 2011 Comment
  CAS-BOT-BC90262  Artemisia douglasiana J. H. Thomas 1960-8-30 8862 Colusa About 2.4 miles NW of Sycamore on road to Colusa Comment
  CHSC94281  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
  POM129846  Asclepias fascicularis Roxana Stinchfield 1916-7-11 s.n. Colusa Davis Tule, near Sycamore Slough. Comment
  JEPS82548  Asclepias speciosa L. R. Heckard 1983-7-27 6111 Colusa slopes around Summit Springs (s flank of Snow Mt.); Snow Mt. Comment
  UCD164137  Asclepias speciosa Craig Thomsen 2000-6-12 2364 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD58164  Asclepias speciosa Gordon Harrington 2007-5-15 54 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  CAS-BOT-BC478831  Asparagus officinalis Roxana Stinchfield 1918-7-11 464 Colusa Davis Tule near Sycamore Slough 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
  SEINET12318320  Asteraceae J. A. LeFurgey 1978-1 4 Colusa ca 0.3 mi W of jct of hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  SEINET12326957  Asteraceae Unknown 1978-1 12 Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams 143 Comment
  CDA26624  Astragalus breweri T. C. Fuller 1958-4-17 Colusa 1 mile south of Lodoga. 0 Comment
  UCD163230  Astragalus clevelandii Craig D. Thomsen 2001-5-24 2535 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  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
  UC638665  Astragalus gambelianus Ethel Crum 1938-5-7 2017 Colusa 4.2 mi n Rumsey (Inner North Coast Range, summit of ridge); Inner North Coast Range, summit of ridge, n of Rumsey 254 Comment
  UC71640  Astragalus gambelianus Miss Alice King 1905-1 Colusa College City Comment
  UCD163330  Astragalus gambelianus Craig D. Thomsen 2009-5-3 2799 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  UCD169698  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 Colusa Along Highway 20 just east of the Colusa/Lake County Line ca. 14.6 miles east of the junction of State Highways 20 and 53. 558 Comment
  RSA475236  Astragalus gambelianus Aaron Liston 1988-3-16 699 -2 Colusa 3.3 miles N of Stonyford on Elk Creek Road. 300 Comment
  CHSC112270  Astragalus rattanii var. jepsonianus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18634 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC29256  Astragalus rattanii var. jepsonianus John Steiner 1977-4-16 46 Colusa Growing in an open field, ca. 0.5 km w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 322 Comment
  SEINET5586429  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-1 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53 558 Comment
  UC1613418  Astragalus rattanii var. jepsonianus Charles M. Belshaw 1937-4-25 2830 Colusa Cooks Spring, Devils Ridge Inner Coast Range, Cooks Spring, Devils Ridge Comment
  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
  UCD63032  Astragalus rattanii var. jepsonianus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4684 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 312 Comment
  UCD81236  Astragalus rattanii var. jepsonianus Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5400 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. 224 Comment
  UCSB3001  Astragalus trichopodus var. lonchus Keator, Glenn 1958-4-16 Colusa Between Hough springs and Bartlett springs on road to Nice Comment
  JEPS80461  Athyrium filix-femina var. cyclosorum Alice Q. Howard 1972-7-10 Colusa trail from Fouts Camp to Box Springs (n side of ridge seaprating Trout and Paradise Creeks); Snow Mt 1676 Comment
  JEPS53235  Athysanus pusillus Alice King May, 1906 Colusa College City Comment
  UC638659  Athysanus pusillus Ethel Crum 1938-5-8 2024 Colusa 3 mi n of Leesville; Inner North Coast Range Comment
  UCD64044  Athysanus pusillus Craig D. Thomsen 2000-3-8 2036 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
  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
  CDA22995  Atriplex argentea Mike Pitcairn 2008-8-2 PDR# 1440792 Colusa Colusa Wildlife Refuge, 1.5 miles S of Hwy 20 0 Comment
  CHSC94745  Atriplex argentea var. mohavensis Lowell Ahart 2006-9-26 13346 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  CHSC80182  Atriplex depressa B. Castro; G. Kuenster 2000-7-19 1209 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 44 Comment
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 Comment
  POM164903  Atriplex joaquinana Roxana S. Ferris 1917-4-12 505 Colusa 4 miles east of Williams. Comment
  JEPS100804  Atriplex persistens Dean W. Taylor 1993-7-9 13853 Colusa 300 m S of Sacramento National Wildlife Refuge headquarters; Sacramento National Wildlife Refuge 30 Comment
  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
  UC40790  Atriplex semibaccata J. Burtt Davy May 1898 4287 Colusa Maxwell Comment
  CHSC94733  Atriplex triangularis Lowell Ahart 2006-9-26 13347 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  JEPS81281  Avena barbata L. R. Heckard and J. C. Hickman 1982-7-5 5892 Colusa Summit Springs Snow Mt. (s side of mt) 457 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
  UCD56362  Avena fatua Beecher Crampton 1962-4-17 6213 Colusa Sycamore. 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
  UCR201551  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14260 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  HSC87058  Baccharis salicifolia Pat Daly, Rudy Galindo 1988-4-16 53 Colusa 3.7 miles west on Goat Mountain Rd. off of Lodoga-Stonyford Rd. to Digger Pine Campground; Stony Creek, .5 mile from campground 452 Comment
  CAS-BOT-BC100066  Balsamorhiza macrolepis James Jokerst 1985-4-5 2210 Colusa Wilbur Springs Quad. Near Coyote Peak 456 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
  SBBG119875  Bassia hyssopifolia L. Ahart 2003-8-15 10509 Colusa S side of St Hwy 20, ca. 1 mi SW of Williams 27 Comment
  UCD38965  Bassia hyssopifolia Beecher Crampton 1961-7-20 5934 Colusa 4 miles SE of Grimes, along Knight's Landing Road. 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
  CHSC84963  Bergia texana Lowell Ahart 2003-10-23 10670 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCR71523  Bergia texana Barbara Ertter, Et al. 1989-10-21 8869 Colusa SE end of East Park Reservoir north of Lodoga 366 Comment
  UCD140003  Bolboschoenus fluviatilis V. C. Bryant 1929-8-23 s.n. Colusa Colusa. Comment
  SEINET8354595  Bolboschoenus fluviatilis David B. Marshall 1954-7-20 Colusa Colusa National Wildlife Refuge. Comment
  CHSC107126  Bolboschoenus glaucus L. P. Janeway; B. Castro 2011-5-19 10286 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.3 km northeast of Tehama-Colusa Canal. East edge of the marsh. 49 Comment
  CHSC80474  Bolboschoenus glaucus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  JEPS101904  Bolboschoenus glaucus Dean W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, along Ohm Road 39 Comment
  CAS-BOT-BC75490  Bolboschoenus glaucus B. Crampton 1953-4-29 1150 Colusa 4 miles east of Norman. Comment
  CHSC57146  Bolboschoenus maritimus K. R. Stern 1980-6-1 6641 Colusa Vernal pool, south-central border area of Colusa Wildlife Refuge. 45 Comment
  UCD72536  Bolboschoenus maritimus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3827 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
  CHSC107176  Bolboschoenus maritimus subsp. paludosus L. P. Janeway; B. Castro 2011-5-19 10287 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. In 0-6 cm of standing water where overgrown dirt roadbed passed through the marsh. 49 Comment
  CHSC83450  Bolboschoenus maritimus subsp. paludosus Bill Maslach 2001-6-6 14 Colusa Norman Rd., Colusa/Glenn Co. line. In roadside ditch. 50 Comment
  UCR206359  Brassica George K. Helmkamp, E. A. Helmkamp 2009-3-11 14384 Colusa Sacramento Valley, along CA-20 at Lone Star Road, northeast of Williams 13 Comment
  CAS-BOT-BC127866  Brickellia greenei Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5034 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
  CHSC32208  Brickellia greenei James Jokerst 1980-8-7 1066 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  JEPS75869  Brickellia greenei L. R. Heckard 1974-9-10 3879 Colusa along e trail, se of saddle between peaks Circle Trail 2011 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
  POM169614  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa Near College City. Comment
  CAS-BOT-BC482891  Brodiaea elegans subsp. elegans Roxana Stinchfield 1916-6-18 300 Colusa near College City 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
  SEINET10822097  Bromus arenarius Lowell Ahart 2006-8-22 Ahart 13216 Colusa T18N, R6W, between the southwest 1/4 and southeast 1/4 of Section 29. South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD37188  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa Colusa County, 10.1 miles southeast of Leesville, east of foothills known as Three Sisters. Comment
  UCD37189  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa Colusa County, 5.8 miles south of Lodoga. Comment
  UCR119114  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Inner North Coast Ranges, 12 miles northwest of Rumsey, along Highway 16. 381 Comment
  UCD81887  Bromus carinatus Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5771 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Southern portion of Lynch Canyon, just S of building known as Roadkill Cafe. Along Thompson Creek, E of road crossing. 423 Comment
  CAS-BOT-BC149477  Bromus carinatus var. carinatus F. P. Cronemiller 1924-5-12 877 Colusa Below Lower Letts Valley. 1219 Comment
  CAS-BOT-BC155997  Bromus diandrus Roxana S. Ferris 1926-4-21 6277 Colusa Sycamore Slough 2 miles from Sycamore. Comment
  HSC100292  Bromus diandrus J. P. Smith 2011-4-27 13144 Colusa Along Hwy. 16, 1.3 mi. S of junction with Hwy. 20 315 Comment
  RSA163468  Bromus diandrus Roxana S. Ferris 1926-4-21 6217 Colusa On Sycamore slough, 2 miles from Sycamore Comment
  UCD58523  Bromus diandrus Beecher Crampton 1962-4-17 6215 Colusa Sycamore. Comment
  JEPS75408  Bromus hordeaceus W. L. Jepson 1932-5-8 16289 Colusa Stonyford 365 Comment
  UCD57554  Bromus hordeaceus Cindy Yip; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  CHSC100264  Bromus laevipes D. Isle 1988-4-13 1512 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  HSC31698  Bromus laevipes Thomas E. Higley 1974-5-4 63 Colusa 3/4 mi. N of T junction of Indian Valley. 854 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
  UCD81893  Bromus madritensis Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5777 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. SW of Roadkill Cafe near stock pond. 429 Comment
  CDA16100  Bromus madritensis subsp. rubens G. F. Hrusa 1999-5-16 15043 Colusa North Coast Ranges; Slopes above Fouts Springs, on serpentine, immediately below Verbena spring. Few on roadside, scattered here, dominant in a few sites. Annual. 594 Comment
  UC1543159  Bromus madritensis subsp. rubens Charlotte G. Nast 1936-4-17 135 Colusa Williams to Lake County Road Lake County Road 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
  UCD59540  Bromus rubens Beecher Crampton 1958-4-21 4726 Colusa Yolo Co.--Colusa Co. line: Along State Hwy. 16, junction Bear and Cache Creeks, 7.4 miles NW of Rumsey. Comment
  CHSC94534  Bromus tectorum Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD65639  Bromus tectorum Craig D. Thomsen 2000-4-28 2174 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC273299  Cacaliopsis nardosmia Volney Rattan 1884-6-1 s.n. Colusa Coast Mts. North of San Francisco Bay 1524 Comment
  CAS-BOT-BC273300  Cacaliopsis nardosmia J. M. Tucker; John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout and Upper Letts Valley (ca. 2 1/2 miles, airline, north of the lookout), Goat Mountain 1524 Comment
  UC1183418  Cacaliopsis nardosmia J. M. Tucker and John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout, Goat Mountain and upper Letts Valley (ca. 2.5 mi air n of lookout) Comment
  CDA42953  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa Inner North Coast Range; On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. Comment
  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
  SBBG128801  Calandrinia breweri L. Ahart 2013-5-1 18673 Colusa N sie of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  CAS-BOT-BC438309  Calandrinia ciliata Roxana S. Ferris 1917-4-12 535 Colusa 4 miles east of Williams Comment
  CHSC59333  Calandrinia ciliata Mark Hershkovitz 1991-5-3 Colusa Bear Valley, along Bear Valley Rd. Plants common near fenceline in central region of valley. 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
  SEINET3872957  Calandrinia ciliata Richard R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca 10 miles north of Colusa (junction of State Hwys. 45 & 20).; 0 22 Comment
  UCR73129  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Bear Valley, along Bear Valley Rd. Near fenceline in central region of valley Comment
  HSC62784  Calandrinia ciliata Thomas Wood 1979-4-14 111 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  CHSC86517  California macrophylla B. Castro; Beth Hendrickson 2003-3-24 1398 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. On and along dirt road. 289 Comment
  CHSC60670  Callitriche marginata Vernon H. Oswald 1993-4-14 5261 Colusa W side of O'Hair Rd., just S of Hwy. 20, Colusa National Wildlife Refuge, SW of Colusa. On the bottom of a depression in a field along the road. 18 Comment
  RSA135689  Callitriche marginata A. A. Heller, H. E. Brown 1902-5-2 9382 Colusa Princeton. Comment
  JEPS80389  Calocedrus decurrens L. R. Heckard and J. Hickman 1981-6-22 5622 Colusa at edge Veratrum meadow; Snow Mt., Dark Hollow Creek, Big Meadow, Veratrum meadow 1889 Comment
  CHSC2225  Calochortus amabilis V. Holt 1946-4-18 Colusa Cache Creek. 243 Comment
  HSC48142  Calochortus amabilis Thomas W. Nelson, Jane P. Nelson 1978-4-30 3970 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  UC1733753  Calochortus amabilis Kay H. Beach 1940-5-16 660 Colusa Colusa and Lake county line Comment
  CAS-BOT-BC492117  Calochortus amabilis F. P. Cronemiller 1924-5-10 875 Colusa Mill Creek Ranger Station 609 Comment
  UCD63617  Calochortus amabilis Craig D. Thomsen 1999-5-12 2030 Colusa BLM Payne Ranch. Approximately 0.5 mile southwest of intersection of Hwy 16 and Hwy 20. On large knoll. Comment
  CHSC89879  Calochortus luteus B. Castro; L. Janeway 2001-5-10 1248 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge on steep E-facing slope 396 Comment
  SJSU9982  Calochortus luteus E. O. Haas 1956-5-12 69 Colusa Salt Creek c. 10 mi SW of Arbuckle 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
  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
  UC1051720  Calochortus splendens Helen K. Sharsmith 1953-6-19 4276 Colusa e slope Snow Mountain (on Bonny Doon road); Inner North Coast Ranges, Mendocino National Forest 670 Comment
  UC1051717  Calochortus superbus Helen K. Sharsmith 1953-6-19 4269 Colusa near North and Middle Forks of Stony Creek confluence; Inner North Coast Ranges, Mendocino National Forest 548 Comment
  UCD66859  Calochortus superbus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5062 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Destinella Flat, on the west side of main drainage. 579 Comment
  JEPS80134  Calochortus tolmiei L. R. Heckard with J. Hickman 1980-7-2 5294 Colusa ca 10 mi w Stonyford (just above (ne of) Summit Springs, sw of Snow Mt. peaks, Colusa-Lake County boundary) 1584 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
  RSA296716  Calochortus uniflorus Thomas Wood 1979-4-14 110 Colusa Bear Valley Road, 13 miles north of Hwy 20; Wilbur Springs Quad. 396 Comment
  UCD83629  Calochortus uniflorus Fanny Ye; with PLB 102 class 2010-5-2 1 Colusa E slope of Walker Ridge. Eaton Springs. On edge of campsite/parking area. 709 Comment
  UCR212336  Calycadenia fremontii Craig D. Thomsen 2000-6-23 2401 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.25). 342 Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  CHSC79447  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 Colusa the North Coast Ranges. Small colony on open grassy flat within chaparral/Quercus douglasii woodland. Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. UTM: 10S, 05401N, 43499E 400 Comment
  RSA255585  Calycadenia pauciflora Gerald D. Carr 1972-6-14 703 Colusa At the Lake County line on Hwy. 20 Comment
  CAS-BOT-BC270742  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 mile W of Leesville - Lodoga Road on road to Cook's Springs Comment
  CAS-BOT-BC270743  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles N of Highway 20 on Bear Valley Road, along banks of Bear Creek Comment
  CAS-BOT-BC270744  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles E of Walker Ridge Road on Deadshot Road, Deadshot Flat 731 Comment
  CAS-BOT-BC270745  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles S of Bartlett Springs Road on Walker Ridge Road, Buck Flat 868 Comment
  RSA255526  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2 miles southwest of Leesville on road to Bartlett Springs Comment
  RSA255558  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 miles east of Lake County line on Bartlett Springs Road Comment
  RSA255605  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles west of Stoneyford on road to Fout Spr. 610 Comment
  RSA255613  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles southwest of Leesville on Bartlett Spr. Road 518 Comment
  RSA788191  Calycadenia pauciflora R. L. Carr 1978-8-20 2156 Colusa Bear Valley Rd, 0.1 mi N of jct with Brim Rd (to Bartlet Springs), ca. 2 mi SW of Leesville, (=GDC 651). 451 Comment
  RSA788192  Calycadenia pauciflora R. L. Carr 1978-8-20 2155 Colusa Brim Rd (to Bartlett Spr.), 1.5 mi W of jct with Bear Valley Rd, ca. 3.6 mi SW of Leesville, (=GDC 652). 482 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
  UC1876245  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 mi S of Bartlett Springs Rd. on Walker Ridge Rd., Buck Flat. 868 Comment
  UC1953748  Calycadenia pauciflora 1978-8-20 2153 Colusa 3.7 mi W of Colusa-Lake Co. line on Hwy 20 (gdc #657) 570 Comment
  UC1971691  Calycadenia pauciflora 1978-8-20 2156 Colusa Bear Valley Road, 0.1 mi N of jct with Brim Road (to Bartlett Springs), ca. 2 mi SW of Leesville (=GDC 651) 482 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
  UCD13380  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa 2.8 miles west of Stonyford, along Foot Springs Rd. Comment
  UCD63125  Calycanthus occidentalis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4955 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 436 Comment
  UCD68099  Calyptridium monospermum Kathleen A. Robson 1981-5-23 37 Colusa From Stonyford, take Fouts Spring Road 12 miles West, past Fouts Springs to Letts Lake, Mendocino National Forest. 1219 Comment
  HSC41916  Calystegia collina subsp. collina M. A. Baker 1977-4-24 225 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD163873  Calystegia collina subsp. collina Craig D. Thomsen 2000-5-11 2307 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1.5 mile west of Hwy 20/16 instersection. Comment
  CHSC70976  Calystegia collina subsp. oxyphylla Vernon Oswald; Lowell Ahart 1998-5-7 9000 Colusa Barlett Springs Rod. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  UCSB4973  Calystegia occidentalis Keator, Glenn 1958-6-16 Colusa Foothills west of Bartlett Springs Comment
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  HSC72156  Camissonia graciliflora J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9544 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  POM271975  Camissonia graciliflora Lyman Benson 1935-3-27 6328 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  JEPS80789  Campanula prenanthoides L. R. Heckard and J. C. Hickman 1981-7-30 5762 Colusa se side Snow Mt.; Trout Creek 1569 Comment
  UCD64045  Capsella bursa-pastoris Craig D. Thomsen 2000-3-8 2037 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR206868  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14315 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  CHSC62923  Cardamine oligosperma Vernon H. Oswald; Lowell Ahart 1994-4-6 6056 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. On a roadside bank. 463 Comment
  CHSC87152  Cardamine oligosperma Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  CAS-BOT-BC19165  Carex barbarae Roxana S. Ferris 1926-4-22 6315 Colusa Near Sycamore. Comment
  CHSC79590  Carex bolanderi L. P. Janeway 2000-5-31 6772 Colusa High North Coast Ranges. At Trough Spring; about 8.9 km southwest of Stonyford. 1049 Comment
  UC1563912  Carex bolanderi Barbara Ertter 1989-7-1 8607 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  JEPS109533  Carex hassei Dean W. Taylor 1992-6-10 12701 Colusa Highway 162 Alder Springs Road, ca 2 miles west from Grindstone Road 1371 Comment
  CHSC76352  Carex klamathensis L. P. Janeway; B. Castro 1999-7-5 6497 Colusa At Bear Wallow Spring; on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. 1045 Comment
  JEPS83819  Carex lenticularis var. impressa L. R. Heckard and J. Hickman 1980-9-16 5461 Colusa cirque area between peaks, ne slope of West Peak, Snow Mt. West Peak; Snow Mt., West Peak 2011 Comment
  JEPS80879  Carex luzulina var. luzulina L. R. Heckard and J. C. Hickman 1980-9-16 5456 Colusa Northeast slope of West Peak, cirque area between peaks, Snow Mt. 2011 Comment
  CDA12170  Carex nudata G. F. Hrusa 1993-5-2 10866 Colusa North Coast Ranges; USFS Frenzel Creek Research Natural Area.Little Stony Creek at confluence with Frenzel Creek. Comment
  UC1748289  Carex praegracilis L. P. Janeway and B. Castro 1999-7-5 6499 Colusa 0.5 mi NE of Pacific Point ( at Bear Wallow Spring, on N side of Lovelady Ridge) 1045 Comment
  UCD163204  Carex praegracilis Craig D. Thomsen 2000-3-31 2069 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
  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
  UCD61461  Carex praegracilis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3907 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  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
  UCR228283  Carex praegracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4947 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 399 Comment
  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
  CHSC94852  Carex serratodens Lowell Ahart 2006-6-11 12669 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
  JEPS81282  Carex serratodens L. R. Heckard and J. C. Hickman 1982-7-5 5893 Colusa s. side Snow Mt. (Summit Springs, slope below (s. of) area); Summit Springs 1500 Comment
  UCD82720  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD82727  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2910 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD83755  Carex serratodens Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5952 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  JEPS75135  Carex subfusca L. R. Heckard 1972-7-8 3040 a Colusa on n side of ridge running se West Peak; Snow Mt. 2011 Comment
  JEPS80865  Carex subfusca L. R. Heckard and J. C. Hickman 1981-7-30 5771 Colusa along Trout Creek, se side of Snow Mt. Snow Mt., Trout Creek 1600 Comment
  CAS-BOT-BC116775  Carex subfusca Peter H. Raven; R. Snow 1959-9-11 14422 Colusa Along stream in wet soil, Bonnie View. 914 Comment
  UCR49825  Castilleja L. F. LaPre 1987-6-30 s.n. Colusa Mendocino National Forest, turnout on Stony Creek Road 474 Comment
  JEPS81046  Castilleja affinis subsp. affinis Thomas W. Nelson and Jane P. Nelson 1979-4-11 4612 Colusa 5 mi e Leesville (along the Leesville to State Route 20 cutoff) Comment
  CHSC71000  Castilleja applegatei subsp. martinii Vernon Oswald; Lowell Ahart 1998-5-7 8995 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS39674  Castilleja applegatei subsp. martinii Rimo Bacigalupi, T. Crovello and L. Heckard 1965-4-26 9043 Colusa 1.4 mi s Wilbur Springs turnoff (along road to Bear Valley) 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
  UCR37517  Castilleja applegatei var. applegatei C. G. Phillips, K. B. Barrows, L. Cole, S. A. Haultain 1984-4-29 Colusa Bear Valley Road, 2 mi north of Hwy. 20 366 Comment
  CHSC107964  Castilleja attenuata B. Castro; T. Boullion 2011-4-20 1841 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 1000 ft northeast of Tehama-Colusa Canal. Off north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in grassy uplands. 49 Comment
  CHSC81307  Castilleja attenuata J. Trizzino 2001-3-31 16 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  UCD122333  Castilleja attenuata Kim E. Steiner 1978-4-29 194 Colusa Walker Ridge Rd., 1.5 mi N of State Hwy 20. 777 Comment
  UCR37943  Castilleja exserta Mike Malamus, P. Williams, Brian Kearney 1984-4-29 70 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  CDA32834  Castilleja exserta P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD15677  Castilleja exserta Anne B. Overturf 1989-4-8 13 Colusa Lake County border. Walker Ridge. 658 Comment
  CHSC89874  Castilleja exserta subsp. exserta B. Castro; S. Innecken 2001-3-26 1218 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. On top of small knoll. 91 Comment
  UCR47925  Castilleja exserta subsp. exserta Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 mi north of State Hwy 20 Comment
  HSC67098  Castilleja exserta subsp. exserta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 42 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  CHSC112412  Castilleja foliolosa Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18642 Colusa Rocky serpentine outcrop on the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles west of Williams. 566 Comment
  JEPS124244  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  RSA783308  Castilleja foliolosa R. R. Halse 2011-3-25 8160 Colusa Along State Hwy 20 just E of the Lake County Line. ca. 14.6 miles E of its junction with State Hwy 53. 558 Comment
  UCR206722  Castilleja foliolosa George K. Helmkamp, E. A. Helmkamp 2009-3-17 14394 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  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
  UCR37942  Castilleja rubicundula subsp. lithospermoides P. Williams, Brian Kearney, Mike Malamus 1984-4-28 74 Colusa 2.9 mi west of Leesville Lodoga Junction on Brim Road. 418 Comment
  HSC45508  Castilleja rubicundula subsp. lithospermoides M. Alcasas 1978-4-23 60 Colusa Bear Valley Rd., 4.7 mi. from Barlett Springs Rd. 457 Comment
  UCD123056  Castilleja rubicundula subsp. lithospermoides Barrie Stanford 1966-4-16 27 Colusa Bear Valley, 5 miles north of Wilbur Springs. Comment
  CHSC34821  Castilleja rubicundula subsp. rubicundula M. S. Taylor; E. Pierce 1981-5-17 3757 Colusa On e side of Ladoga-Stonyford Rd. 335 Comment
  JEPS121116  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2013-5-1 18687 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  RSA182037  Castilleja rubicundula subsp. rubicundula Annetta Carter, Louise Kellogg 1953-6-20 3239 Colusa Road to Leesville, 6 miles north of Wilbur Springs Junction 400 Comment
  UC1745694  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1389 Colusa S end of lake 0.4 mi. N of Lodoga. Comment
  UC903276  Castilleja rubicundula subsp. rubicundula Ethel Crum 1932-5-7 1458 Colusa Lodoga Comment
  UCD82578  Castilleja rubicundula subsp. rubicundula Craig Thomsen 2008-6-12 2768 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  CAS-BOT-BC40505  Caulanthus lasiophyllus Roxana S. Ferris 1926-4-22 6289 Colusa Tule land 3 miles west of Colusa. 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
  JEPS121112  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  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
  UCD67002  Caulanthus lasiophyllus Craig D. Thomsen 2008-5-23 2748 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  UCD21573  Caulanthus lasiophyllus Craig D. Thomsen 2003-5-8 s.n. Colusa En route to Wilbur Hot Springs, approx 1/8 mile west of Bear Valley Rd on Wilbur Springs Rd. Open grassland at base of slope. 396 Comment
  CHSC22526  Ceanothus cuneatus Robert A. Schlising; Glenn Keator 1962-1-21 2032 Colusa Steep adobe bank and open hills. 548 Comment
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Mar 26 2014
  UCD33934  Ceanothus cuneatus Beecher Crampton 1975-4-21 9165 Colusa Colusa County, 4 miles N.N.E. of Lodoga, grapevine summit. Comment
  UCD56939  Ceanothus cuneatus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3541 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UCD84453  Ceanothus integerrimus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CAS-BOT-BC83779  Ceanothus jepsonii D. O. Burge; V. Church 2007-12-28 972 b Colusa Mendocino National Forest, roadside on Goat Mountain Road 430 Comment
  SEINET13945967 Image available Ceanothus jepsonii Thomas E. Higley 1974-1 69 Colusa 3/4 mi N of T junction ofIndian Valley; 2800 ft alt., T14N R6W SEC12 Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  RSA757814  Ceanothus jepsonii var. albiflorus Dylan O. Burge 2008-5-27 DOB 997 c Colusa Rathburn-Petray Mine complex, east of Eaton Springs, 12.3 km 193 degrees true south-southwest of Leesville. 700 Comment
  UCD72391  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5117 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UC1299512  Ceanothus palmeri Freed W. Hoffman 1947-6-19 1655 Colusa Cook's Springs Cook's Springs (western Colusa County) 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
  SEINET11587777  Centaurea melitensis Unknown 2009-5-20 14758 Colusa Colusa County 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
  UCD82829  Centaurea solstitialis Gina Darin; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 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
  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
  UCD64030  Centaurium tenuiflorum Craig D. Thomsen 2000-6-23 2408 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
  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
  UCD66949  Centromadia fitchii Ellen Dean; Davis Botanical Society 2008-5-31 4994 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  CAS-BOT-BC272813  Centromadia parryi subsp. parryi H. M. Hall 1930-10-3 12938 Colusa Southwestern Colusa County. North of Wilbur Springs on road to Stonyford Comment
  CAS-BOT-BC384657  Centromadia parryi subsp. parryi Andrew Townesmith; Karen M. Meyer 2007-8-7 909 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford 499 Comment
  CAS-BOT-BC271546  Centromadia parryi subsp. rudis A. A. Heller 1941-9-22 16331 Colusa Along U.S. Highway #99W between Williams and Maxwell Comment
  UCD77502  Centromadia parryi subsp. rudis Robert E. Preston 1999-9-24 1242 Colusa Antelope Valley, at head of Salt Canyon. 219 Comment
  CHSC89831  Centromadia pungens subsp. maritima B. Castro; S. Innecken 2001-3-20 1217 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 Comment
  JEPS12580  Centromadia pungens subsp. pungens R. F. Hoover 1936-5-22 1218 Colusa Williams Comment
  JEPS38150  Centromadia pungens subsp. pungens W. L. Jepson 1934-5-3 16600 Colusa n of Colusa (Stegeman Station) 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
  CAS-BOT-BC388223  Cerastium glomeratum Roxana S. Ferris 1917-4-1 497 Colusa 4 miles East of Williams Comment
  UCD137767  Ceratophyllum demersum Franklin Raney 1957-9-3 s.n. Colusa Colusa. Comment
  CHSC81263  Cercis occidentalis J. Trizzino 2001-3-31 13 Colusa Bear Valley Road about 2 mi from southern entrance to valley along east side of road. 408 Comment
  SFV8462  Cercis occidentalis R. D. Deragisch 1969-4-20 12 Colusa Near Bear Creek Bridge on CA State Highway 16, about 2 miles north of Colusa-Yolo County line. 152 Comment
  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
  UCD113027  Cercocarpus betuloides G. F. Hrusa 1996-2-26 12635 Colusa Inner North Coast Ranges. E side of ridge separating Blanchard Valley from Bear Valley, on Leesville Road. 600 Comment
  CAS-BOT-BC136987  Cercocarpus betuloides var. betuloides Roxana S. Ferris 1926-4-23 6419 Colusa Grade beyond Mountain House on Williams - Stonyford Road Comment
  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
  HSC71298  Cercocarpus montanus var. glaber Thomas W. Nelson, Jane P. Nelson 1979-4-12 4628 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCR53771  Chaenactis glabriuscula Aaron Liston, M. A. Blumler 1987-4-26 667 -1 Colusa Bear Valley, Lodoga Rd, 6.6 mi south of Bartlett Springs and Lodoga Rd junction Comment
  HSC45751  Chaenactis glabriuscula var. glabriuscula Sheila Logan 1978-4-22 82 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  CAS-BOT-BC284537  Chaenactis glabriuscula var. heterocarpha Annetta Carter 1938-5-8 1394 Colusa Bear Creek Canyon, 4 miles southeast of Wilbur Springs, Inner North Coast Range Comment
  CHSC112267  Chaenactis glabriuscula var. heterocarpha Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18650 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC48143  Chaenactis glabriuscula var. heterocarpha Thomas W. Nelson, Jane P. Nelson 1978-4-30 3971 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  UCD74341  Chaenactis glabriuscula var. megacephala G. Ledyard Stebbins 1968-5-10 6685 Colusa Summit of Walker Ridge, on Lake- Colusa County line, between Hwy 20 and Leesville - Bartlett Springs Rd. South of Leesville at summit of Cold Spring Mtn. (Note: date in notebook is 10 May, but labels made by Stebbins at CAS say 15 May.) 1091 Comment
  JEPS90921  Chamaesyce hooveri Dean W. Taylor 1993-8-31 14071 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  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
  JEPS110186  Chamaesyce serpillifolia subsp. hirtula Lowell Ahart 2006-8-9 13115 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  SBBG28478  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  UCD72463  Chamaesyce serpyllifolia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3797 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
  JEPS75724  Cheilanthes gracillima L. R. Heckard 1974-9-9 3859 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt 1828 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
  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
  UC1195198  Chenopodium album J. H. Thomas 1960-8-30 8865 Colusa about 5 mi nw College City (along road to Sycamore) Comment
  JEPS110092  Chenopodium botrys Lowell Ahart 2006-8-9 13119 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  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
  UC1053454  Chenopodium californicum Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3167 Colusa 8 mi nw Maxwell (along road to Sites, in canyon through first hills on extreme w edge of valley); Sacramento Valley 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
  UCR212300  Chenopodium californicum Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon 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
  CHSC32207  Chenopodium hians James Jokerst 1980-8-7 1065 Colusa North Coast Range. Near Snow Mountain. Comment
  UCD57927  Chloris gayana Beecher Crampton 1961-7-20 5932 Colusa 2 miles S of Grimes. Comment
  CAS-BOT-BC184905  Chloris virgata Margaret J. Williams 1981-9-2 81 -162 Colusa On Wisconsin Avenue, south of Arbuckle. 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
  CHSC32967  Chorizanthe membranacea C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 52 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  CHSC80410  Chorizanthe membranacea Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  UC638667  Chorizanthe membranacea Ethel Crum 1938-5-7 2015 Colusa 4.2 mi n Rumsey (Comanche Hills); Inner North Coast Range, Comanche Hills 254 Comment
  RSA96824  Chrysothamnus nauseosus subsp. albicaulis Percy C. Everett, E. K. Balls 1954-10-17 20333 Colusa 9.1 miles SW of boundary of Mendocino National Forest, road from Stonyford to Upper Lake 793 Comment
  CDA15502  Cirsium cymosum G. F. Hrusa, WTD 1998-6-19 14641 Colusa North Coast Ranges; Below Fouts Springs on Fouts Springs Rd. to Stonyford. About 0.25 km. NE of where Candy Bucket Spring crosses rd. Comment
  UCD66565  Cirsium cymosum Craig D. Thomsen 2001-5-24 2520 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
  JEPS81287  Cirsium occidentale var. venustum L. R. Heckard and J. C. Hickman 1982-7-5 5898 Colusa slope below (s of) area Summit Springs (s side of mountain); Snow Mt., Summit Springs 1500 Comment
  UC71781  Citrullus colocynthis var. lanatus H. P. Chandler Oct. 1905 Colusa Princeton Comment
  CAS-BOT-BC162597  Clarkia affinis C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-29 35 Colusa Bear Valley Rd., 2 mi. N of Hwy 20 365 Comment
  UCR39819  Clarkia affinis P. Williams, Mike Malamus, Brian Kearney 1984-4-28 72 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  CAS-BOT-BC164150  Clarkia concinna Peter H. Raven 1962-5-31 17909 Colusa State Highway 20, 2.5 miles east of Lake County line Comment
  SD52963  Clarkia concinna Peter H. Raven 1962-5-31 17909 Colusa State Highway 20, 2.5 miles east of Lake County Line. 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
  RSA163460  Clarkia concinna subsp. concinna Roxana S. Ferris 1926-4-23 6408 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCD66685  Clarkia concinna subsp. concinna Craig D. Thomsen 2000-5-11 2312 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  SEINET12193550  Clarkia gracilis subsp. albicaulis R. A. DeMartile 1983-1 107 Colusa Bartlett Springs Road N of Baldy Mountain 762 Comment
  CHSC48626  Clarkia gracilis subsp. gracilis Vernon Oswald 1984-5-2 1163 Colusa Sites-Lodoga Rd. 9.5 mi w of Sites. On a road cut. 533 Comment
  CHSC79533  Clarkia gracilis subsp. gracilis B. Castro; L. P. Janeway 2000-5-2 1113 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  JEPS81291  Clarkia gracilis subsp. gracilis L. R. Heckard and J. C. Hickman 1982-7-5 5903 Colusa slope below and s Summit Springs (s side of mountain); Snow Mt. 1500 Comment
  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
  CHSC112017  Clarkia gracilis subsp. sonomensis David Isle; F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of jct w/ Lodoga-Stonyford Road. 408 Comment
  HSC94165  Clarkia gracilis subsp. tracyi G. Fred Hrusa 1998-6-19 14597 Colusa Along Little Stony Creek, on Goat Mtn. Rd., ~0.5 km W of intersection with Lodoga-Stonyford Rd. 400 Comment
  UCD63914  Clarkia gracilis subsp. tracyi Craig D. Thomsen 2001-5-24 2504 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
  UCD70216  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD66864  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5067 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
  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
  HSC45676  Clarkia purpurea subsp. viminea Stephen Plant 1978-4-23 229 Colusa 1.5 mi. from Bear Valley Rd. on Barlett Springs Rd. 421 Comment
  CDA15467  Clarkia rhomboidea G. F. Hrusa, WTD 1998-6-19 14604 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. approx. 2 km. W of campground. Comment
  CHSC72453  Clarkia rhomboidea L. P. Janeway; Dave Isle 1998-7-3 5707 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. On road cutbank. 1051 Comment
  SBBG122897  Clarkia rhomboidea B. Ertter 1989-7-1 8597 Colusa rd to Goat Mtn lookout, 2.2 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1500 Comment
  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
  UC1745699  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1388 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  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
  JEPS121109  Claytonia exigua subsp. glauca Lowell Ahart 2013-5-1 18677 Colusa On the S side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  SBBG128770  Claytonia exigua subsp. glauca L. Ahart 2013-5-1 18677 Colusa S side of wash, N side of State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  UCD162997  Claytonia parviflora Craig D. Thomsen 2000-3-31 2086 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.2 mile west of Hwy 20/16 intersection. 345 Comment
  UCD64520  Claytonia parviflora Craig D. Thomsen 2000-4-12 2126 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  CHSC72461  Claytonia parviflora subsp. parviflora L. P. Janeway; David Isle 1998-7-3 5708 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
  CHSC91069  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 181 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. So. of Bathhouse Trail Rd. 17N51, no. of Fonts Springs. 548 Comment
  JEPS97385  Claytonia parviflora subsp. parviflora Vernon H. Oswald and L. Ahart 1994-4-6 6055 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  UC638660  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2023 Colusa 3 mi n Leesville; Inner Coast Range Comment
  UC936184  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2023 a Colusa 3 mi n Leesville; Inner North Coast Ranges Comment
  RSA755471  Claytonia parviflora subsp. parviflora David W. Isle 2002-4-18 1654 Colusa North of Fouts Springs, North of Chlorinator Building and Road to Bathhouse Trail (Snow Mountain). North aspect of east drainage. 524 Comment
  UC1051503  Claytonia parviflora subsp. parviflora Helen K. Sharsmith 1953-6-19 4285 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  SEINET199005  Claytonia saxosa H. K. Sharsmith 1953-6-20 4292 Colusa Mendocino National Forest ; Summit of Goat Mt. Lake-Colusa boundary 1864 Comment
  UC1051737  Claytonia saxosa Helen K. Sharsmith 1953-6-20 4292 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National Forest, Goat Mt (Lake-Colusa boundary) 1864 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
  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
  UCD95592  Clematis ligusticifolia 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
  UCD59793  Coix lacryma-jobi W. M. Mathisen 1921-11-1 s. n. Colusa Princeton. Comment
  CHSC27553  Collinsia grandiflora Scott E. Patton 1978-4-9 8 Colusa Ca. 0.3 m w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 m sw of Williams. 321 Comment
  UCSB63619  Collinsia grandiflora Maslin, Linyi 1981-4-15 Colusa Ca. 0.5 km w of jct of Hwys 20 & 16; s side of Bear Creek; Ca. 27 km sw of Williams; Wilbur Springs Quadrangle, 15'; S central border of Sect. 36. T14N, R5W 319 Comment
  UCD66680  Collinsia greenei Craig D. Thomsen 2000-5-11 2304 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC33348  Collinsia heterophylla R. M. Winchell 1980-4-12 1 Colusa Ca. 0.3 mi. w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca. 18 mi. sw of Williams. 321 Comment
  UC71624  Collinsia heterophylla Miss Alice King 1905-1 Colusa College City Comment
  UCD57100  Collinsia heterophylla Gordon Harrington; Diana Hickson 2007-4-7 0015 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCD64412  Collinsia heterophylla Craig D. Thomsen 2000-4-12 2139 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  JEPS80140  Collinsia rattanii L. R. Heckard with J. Hickman 1980-7-2 5300 Colusa ca 10 mi w Stonyford (trail to Snow Mtn. peaks from Summit Springs); Colusa-Lake County Boudary 1661 Comment
  UCD162990  Collinsia sparsiflora Craig D. Thomsen 2000-3-8 2035 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC48984  Collinsia sparsiflora var. arvensis Vernon Oswald 1983-3-28 223 Colusa About 3.2 mi s of Stonyford on the Lodoga-Stonyford Rd. 365 Comment
  UCD58120  Collinsia sparsiflora var. arvensis Ellen Dean; PLB 102 Class 2007-4-29 3716 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. 304 Comment
  POM253019  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa On Highway #20, 15 miles west of Williams. Comment
  UC1736363  Collinsia sparsiflora var. collina Dean W. Taylor 1992-4-16 12404 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek 411 Comment
  CHSC48647  Collomia diversifolia Vernon Oswald 1986-5-12 2011 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. On a roadcut. 487 Comment
  CHSC48648  Collomia diversifolia Vernon Oswald 1984-5-2 1167 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18N01) 5.7 mi w of Stonyford. On a road cut. 609 Comment
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  HSC31719  Collomia diversifolia Teresa Prendusi 1974-5-4 51 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  UCD74342  Collomia diversifolia G. Ledyard Stebbins 1968-5-10 6686 Colusa South end of Walker Ridge, north of Hwy 20. Near headwaters of Sulphur Creek. (Note: notebook says date of collection was 10 May. Labels made by Stebbins at CAS say 15 May.) 762 Comment
  UCD57550  Convolvulus arvensis Andrew Pedersen; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek. 304 Comment
  CHSC67605  Cordylanthus palmatus James D. Jokerst 1988-8-23 3039 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
  JEPS83552  Cordylanthus palmatus R. D. Stone 1987-8-26 850 Colusa w side of Ohm Rd ca 0.5 mi n jct. w/ Ware Rd.; Colusa Nat'l Wildlife Refuge, Arbuckle 7.5' quad. 13 Comment
  JEPS83787  Cordylanthus palmatus J. D. Jokerst 1988-8-23 3036 Colusa Cell No. 12 Delevan National Wildlife Refuge (e of the old barn, n central portion of Refuge) Comment
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  RSA0084708  Cordylanthus palmatus Ellen Cypher 2005-8-22 2005 -023 Colusa Delevan National Wildlife Refuge, Tract 12, CNDDB EO# 13 18 Comment
  UC1561032  Cordylanthus palmatus Dean W. Taylor 1988-8-8 10024 Colusa far se corner of Colusa National Wildlife Refuge (along Ohm Rd, 1 mi n of Ware Rd.) 22 Comment
  CDA16105  Cordylanthus pilosus G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15248 Colusa North Coast Ranges; Cedar Camp- Goat Mtn. Rd. 792 Comment
  JEPS14919  Cordylanthus pringlei Rimo Bacigalupi with G. T. Robbins, L. T. Dempster, and L. R. Heckard 1956-7-26 5748 Colusa 1/2 mi above Fir-Root Spring Public Camp (at summit of ridge forming Colusa-Lake Co. line, on Colusa side, e of head of Long Ridge, region about 7 mi s of Snow Mountain) 1402 Comment
  RSA505428  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  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
  CHSC107950  Cotula coronopifolia B. Castro; T. Boullion 2011-4-20 1833 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. At north edge of large +- saline/alkaline wetland/marsh, at outer, wet edges of bald patches of bare pale soil. 49 Comment
  CHSC107965  Cotula coronopifolia B. Castro; L. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; aproximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 Comment
  CHSC60648  Cotula coronopifolia Vernon H. Oswald 1993-4-14 5266 Colusa S side of the Tour Route just W of Headquarters, Colusa National Wildlife Refuge, SW of Colusa. Bordering a pond. 18 Comment
  UCD64262  Crassula connata Craig D. Thomsen 2000-3-31 2059 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
  CHSC62886  Crassula tillaea Vernon H. Oswald 1994-3-14 5993 Colusa Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. Sacramento National Wildlife Refuge. 25 Comment
  JEPS86621  Crepis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6701 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain); Snow Mountain 1500 Comment
  CHSC32200  Crepis monticola James Jokerst 1980-8-8 1078 Colusa North Coast Ranges. Near Snow Mountain (West). Hillside. Comment
  JEPS15561  Crepis monticola G. Thomas Robbins with L. R. Heckard 1956-7-25 3719 Colusa Snow Mt. West; summit, Lake-Colusa Co. boundary 2145 Comment
  JEPS15568  Crepis pleurocarpa G. Thomas Robbins with L. R. Heckard 1956-7-25 3713 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
  UCD126230  Cressa truxillensis H. S. Yates 1936-8-14 6133 Colusa 3 miles south of Colusa. 15 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
  UCD55457  Croton setiger Ellen Dean; Gordon Harrington 2006-10-6 3281 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  JEPS110434  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS120801  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  RSA256295  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1973-5-28 6195 Colusa ca. 3 miles S of Colusa along Hwy. 45. Comment
  UC1100334  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa near Butte Creek (3 mi above Colusa); Butte Lodge Outing Club Comment
  UC1259361  Crypsis schoenoides Barry Hammel 1976-8-5 427 Colusa e side of Hwy 45 near Colusa Golf Club 30 Comment
  UC727674  Crypsis schoenoides Milo S. Baker 1946-9-4 11621 Colusa near locked gate of Colusa Gun Club; Butte Sink Comment
  SEINET4344589 Image available Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  RSA268076  Crypsis vaginiflora J. R. Reeder, C. G. Reeder 1972-6-6 5657 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UCD59987  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa North Coast Ranges. Bear Creek at junction of Sulphur Creek near Sulphur Springs. Comment
  SBBG40520  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Crk cyn N of Hwy 20 (near Wilbur Springs) Comment
  UC79296 Image available Cryptantha excavata Katharine Brandegee Colusa Stites [Sites], Colusa Co. Comment
  UCR233290  Cryptantha flaccida George K. Helmkamp, E. A. Helmkamp 2011-4-1 17133 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  HSC48141  Cryptantha hispidula Thomas W. Nelson, Jane P. Nelson 1978-4-30 3969 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  UC729980  Cryptantha hispidula Leo F. Koch 1940-4-29 935 Colusa 4 mi from Lake County line (along Highway 20) Comment
  UC763082  Cryptantha hispidula R. F. Hoover 1941-5-2 4983 Colusa just e Lake County line (on Williams-Clear Lake highway) Comment
  UC857088  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa county on road to Williams Comment
  UCD63018  Cryptantha hispidula Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4670 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the west of Cowboy Camp on the west side of Bear Creek. 409 Comment
  UCD63124  Cryptantha hispidula Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4954 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 416 Comment
  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
  CDA15300  Cryptantha intermedia G. F. Hrusa 1993-5-2 10865 Colusa North Coast Ranges; Frenzel Creek Research Natural Area-Mendocino Natl. Forest. Mouth of Frenzel Creek at confluence with Little Stony Creek. Comment
  UC763053  Cryptantha intermedia R. F. Hoover 1941-5-2 4984 Colusa on Williams to Clear Lake highway (just e of Lake Co. line) Comment
  UCD63120  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4950 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  RSA114163  Cryptantha intermedia H. K. Sharsmith 1953-6-19 4278 Colusa One mile north of Trough Springs on Trough Springs Ridge. Mendocino National Forest 915 Comment
  SDSU20614  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-4-13 1520 Colusa Bear Valley, on north side of Bear Valley Road, 5.75 miles south of Brim Road junction, on shallow, barren, eroding slopes. 387 Comment
  SDSU20616  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-5-6 1540 Colusa On north side of Bear Valley Road in Bear Valley, 5.8 miles south of Brim Road junction. 387 Comment
  CHSC79477  Cryptantha microstachys B. Castro; L. P. Janeway 2000-5-4 1142 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD84446  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6054 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  UC596361  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w of Arbuckle (Sand Creek foothills); Sand Creek Comment
  CAS-BOT-BC33124  Cryptantha nemaclada M. K. Curran 1884-1-1 s.n. Colusa unspecified Comment
  JEPS80034  Cryptantha torreyana L. R. Heckard 1974-9-10 3900 A Colusa top of East Peak Snow Mt., East Peak 2148 Comment
  UC1177889  Cryptantha torreyana Peter M. Ray 1950-4-16 1733 Colusa canyon of North Fork Big Stony Creek ca 1 mi below crossing of the stream North Fork Big Stony Creek Comment
  SEINET8731274 Image available Cryptantha torreyana Helen K. Sharsmith 1953-1 4282 Colusa Near Trough Springs on Trough Springs Ridge; clearing in Sugar Pine-Douglas Fir forest, Mendocino National Forest. 975 Comment
  RSA589940  Cupressus macnabiana Michael A. Vincent, Robert Rhode 1996-3-30 7307 Colusa Along Walker Ridge Road, 1.0 miles S of junction with Brim Road Comment
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  CHSC44829  Cupressus sargentii David Isle 1978-5-16 Colusa Frenzel Creek Research Area, about 10 mi SW of Stonyford, on Goat Mountain Road. Comment
  CHSC62835  Cupressus sargentii Vernon H. Oswald; Lowell Ahart 1994-3-23 6010 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  UCD37715  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD61441  Cuscuta californica var. californica Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3886 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 335 Comment
  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
  SEINET3157202  Cycladenia humilis T. S. Brandegee 1890-6-23 sn Colusa Snow Mountain 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
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  HSC9502  Cynodon dactylon R. Spellenberg 1964-6-14 397 Colusa Colusa Comment
  CAS-BOT-BC433233  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  CHSC116060  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  UC1177894  Cynoglossum grande Peter M. Ray 1950-4-16 1731 b Colusa junction of N. Fork and Big Stony Creek (n. side of canyon) Comment
  CAS-BOT-BC114781  Cyperus acuminatus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 465 Colusa Davis tule, near Sycamore Slough. Comment
  UC1100564  Cyperus acuminatus Herbert L. Mason and Verne Grant 1946-8-6 12969 Colusa pond 2.7 mi. n. Colusa (between Sacramento R. and Butte Creek); Butte Sink Comment
  UC837462  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule near Sycamore Slough 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
  UC710614  Cyperus difformis John Thomas Howell 1944-7-18 19838 Colusa 3 mi. w. Williams 30 Comment
  UC1100663  Cyperus odoratus Herbert L. Mason 1945-9-19 12721 Colusa 1 mi. n. Colusa (e. bank of Sacramento R., below causeway over Butte Sink spillway); Sacramento R. Comment
  CAS-BOT-BC113935  Cyperus odoratus Gordon H. True 1974-11-15 7839 Colusa On Delevan Road just W of Four Mile Road, 4 mi E of Delevan. 27 Comment
  POM313066  Cyperus strigosus S. Galen Smith 1949-9-9 1871 Colusa Rice fields 3 miles west of Williams Comment
  POM208489  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Sacramento Valley. Comment
  CHSC106228  Danthonia californica var. californica B. Castro; L. P. Janeway 2001-6-3 1253 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  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
  CDA20254  Datisca glomerata G. D. Barbe, Nola Parmer 1982-6-4 3636 A Colusa North Coast Ranges; Goat Mountain Road 8.7 mi w of Ladoga-Stonyford Rd, along Little Stony Creek, 1.2 mi w of Little Stony Creek bridge. Stonyford Ranger District, Mendocino National Forest. 0 Comment
  JEPS120797  Datura stramonium var. tatula Lowell Ahart 2013-10-1 19083 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  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
  UCD38811  Daucus pusillus Beecher Crampton 1958-5-19 4797 Colusa 10.1 miles southeast of Leesville. Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  JEPS81345  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  HSC86893  Delphinium hesperium Pat Daly, Rudy Galindo 1988-4-17 58 Colusa 5.2 mi. S of Bear Valley Rd. 390 Comment
  UCD38812  Delphinium hesperium Beecher Crampton 1958-5-19 4798 Colusa 5.8 miles south of Lodoga. Comment
  UCD57667  Delphinium hesperium Erica A. Smith; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  CHSC83252  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley. Comment
  CHSC83598  Delphinium hesperium subsp. pallescens L. P. Janeway 2002-4-24 7519 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate. 124 Comment
  CHSC89286  Delphinium hesperium subsp. pallescens G. F. Hrusa 1998-6-19 14606 Colusa Northern California. North Coast Ranges. Above Little Stony Creek. Goat Mtn. Rd. +- 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  UC1607881  Delphinium hesperium subsp. pallescens C. G. Nast 1936-4-17 144 Colusa Williams to Lake county Highway Comment
  UC726271  Delphinium hesperium subsp. pallescens A. A. Heller 1940-5-6 15574 Colusa roadside bank on State Hwy #20 about 3 mi e junction with Highway #16 (<later note places locality along road from Williams to Upper Lake...a spot 3 mi e of <junction> actually is n...) Comment
  UCD64411  Delphinium hesperium subsp. pallescens Craig D. Thomsen 2000-4-12 2138 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD64429  Delphinium hesperium subsp. pallescens Craig D. Thomsen 2000-4-28 2208 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
  HSC87027  Delphinium hesperium subsp. pallescens Terry Hines, Ellen Purcell, N. Williams 1988-4-16 55 Colusa 4.2 mi. W on Goat Mtn. Rd., along Stony Creek 0.5 mi. W of Digger Pine Campground 450 Comment
  HSC71332  Delphinium patens Thomas W. Nelson, Jane P. Nelson 1979-4-11 4613 Colusa Along Leesville to SR 20 cutoff 5 mi. E of Leesville Comment
  CHSC46049  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  CHSC69829  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  SEINET946331  Delphinium variegatum June McCaskill 1962-1 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff Comment
  SFV1292  Delphinium variegatum B. J. McCaskill 1962-5-2 651 Colusa On road along Bear Creek from State Highway 20 north to Leesville. 3.6 miles north of Wilbur Springs turnoff. About 200 yards west of road. Comment
  UCD163309  Delphinium variegatum Craig D. Thomsen 1997-4-20 1913 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  RSA400057  Delphinium variegatum L. S. Rose 1936-4-27 36177 Colusa 10 miles NW of Rumsey. 213 Comment
  UCD14294  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa Colusa Co.; 9.8 miles north of Highway 20 on Bear Valley Road, 1/2 mile into field on the east side of the road; Comment
  UCD14295  Delphinium variegatum R. Schulhof 1984-4-21 10 Colusa Colusa Co.; 9.8 miles north of Highway 20 on the east side Bear Valley Road; 381 Comment
  UCD14297  Delphinium variegatum Nelson Cronyn 1984-4-22 5 Colusa Colusa Co.; 3.2 miles north of Highway 20 on Bear Valley Road; 381 Comment
  UCD15427  Delphinium variegatum Margit Sands 1985-4-13 30 Colusa in Bear Valley, 7.4 miles north of Wilbur Hot Springs rd.; 390 Comment
  UCD15434  Delphinium variegatum Lisa Montang 1985-4-13 4 Colusa Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  CDA11414  Delphinium variegatum subsp. variegatum G. F. Hrusa, K. van Katwyk 1995-4-22 12135 Colusa Inner North Coast Ranges; Large colony on hillslope at E base of ridge immed. E of Bear Valley, along Leesville Road. Flowers dark purple. Common, perennial, root not detaching. Comment
  CHSC89827  Delphinium variegatum subsp. variegatum B. Castro; L. Janeway 2001-5-2 1244 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In flat to undulating open grazed grassland between hills of blue oak woodland. Adjacent to dirt road paralleling N-S-trending creek. 335 Comment
  HSC87075  Delphinium variegatum subsp. variegatum L. Blackford, S. Branch, D. Malm 1988-4-17 77 Colusa 1.3 mi. S of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. Comment
  UC1093630  Delphinium variegatum subsp. variegatum Francia Chisaki, Gene B. Newcomb 1958-4-1 1103 Colusa On road to Lodoga, 6.6 miles North of junction with Highway #20 Comment
  HSC96981  Delphinium variegatum subsp. variegatum Jenny Marr, Heidi West, Joyce Lacey, Caroline Warren, Natalie Wight 1998-4-14 Colusa Near Grapevine Creek, Antelope Valley, Sites-Lodoga Rd. 137 Comment
  CAS-BOT-BC192671  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  UCD163709  Deschampsia danthonioides Craig Thomsen 1999-5-10 2021 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  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
  SEINET10524208  Deschampsia danthonioides A. Arthur Heller 1902-5-1 Heller 5435 Colusa Near College City. Comment
  JEPS75750  Deschampsia elongata L. R. Heckard and R. Bacigalupi 1976-9-6 4430 Colusa along trail from Summit Springs to Fouts Camp (Snow Mt.); Lake-Colusa Co. Line, Snow Mt. 1798 Comment
  CHSC48439  Dicentra chrysantha Vernon Oswald 1984-7-20 1609 Colusa M10, 11.3 mi w of Rd. 306 at Stonyford. 792 Comment
  CHSC79752  Dicentra chrysantha L. P. Janeway; B. Castro 2000-5-1 6686 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 243 Comment
  UC1053476  Dicentra chrysantha Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3179 Colusa just w Bear Valley (slope just w of base of grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  SEINET12103160  Dicentra formosa C. L. Abbott 1926-1 s.n. Colusa Colusa Comment
  CAS-BOT-BC500072  Dichelostemma capitatum Roxana S. Ferris 1917-4-17 614 Colusa Sycamore Slough Comment
  CAS-BOT-BC500073  Dichelostemma capitatum Roxana S. Ferris 1917-4-14 600 Colusa 5 mi west of Arbuckle Comment
  HSC31718  Dichelostemma capitatum subsp. capitatum Teresa Prendusi 1974-5-4 50 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC45714  Dichelostemma capitatum subsp. capitatum Sheila Logan 1978-4-2 69 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC83387  Dichelostemma capitatum subsp. capitatum Bob Wych 1975-4-20 18 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. Comment
  UCD163683  Dichelostemma capitatum subsp. capitatum Craig Thomsen 1999-4-15 1984 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD164037  Dichelostemma capitatum subsp. capitatum Amber Flores 2016-4-9 3 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Area just southwest of corral at 16 and 20. 325 Comment
  HSC22054  Dichelostemma capitatum subsp. capitatum D. R. Junell 1965-4-18 23 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  RSA262386  Dichelostemma capitatum subsp. capitatum Elaine J. Imada 1971-4-10 10 Colusa Ca 3 miles N of Yolo Co line on Hwy 16. Comment
  CAS-BOT-BC502550  Dichelostemma congestum Roxana S. Ferris 1926-4-21 6309 Colusa Sycamore Slough near Sycamore Comment
  SD72213  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa Between Williams and Clear Lake, Highway 20. Coastal valley hills. 152 Comment
  UC1053449  Dichelostemma volubile Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3173 Colusa 7.7 mi w Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UC1733760  Dichelostemma volubile Kay H. Beach 1940-5-16 1260 Colusa Colusa and Lake county line Comment
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CAS-BOT-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
  JEPS80804  Dieteria canescens var. shastensis L. R. Heckard and J. C. Hickman 1981-7-30 5774 Colusa about 1.7 km air miles from West Peak (e summit of ridge running e of West Peak); Snow Mt. 2042 Comment
  CHSC94391  Digitaria sanguinalis Lowell Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110360  Digitaria sanguinalis Lowell Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  POM313166  Digitaria sanguinalis H. L. Mason 1945-9-19 12722 b Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  RSA0018384  Dipsacus fullonum Joan Stewart 1998-6-18 755 Colusa Bear Valley Comment
  CHSC107945  Distichlis spicata B. Castro; L. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In south half of the marsh, especially its outer edges, and up into swale to the north. 49 Comment
  JEPS108780  Distichlis spicata Lowell Ahart 2006-9-26 13353 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS118718  Distichlis spicata B. Castro, L. P. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  JEPS123889  Distichlis spicata Lowell Ahart 2015-4-28 20116 Colusa About 5 1/2 miles east of Maxwell. Comment
  RSA0114870  Distichlis spicata Lowell Ahart 2015-4-28 20116 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 571 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
  UCD61442  Distichlis spicata Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3887 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  SEINET11695738  Distichlis spicata C. Witham, Buck, J. 2001-4-30 154 Colusa 2 mi S of Colusa along Hwy 20, E of Hwy 20 and Colusa Airport, Dolan Ranch site Comment
  CAS-BOT-BC433232  Dodecatheon hendersonii Richard R. Halse 2014-3-25 9030 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  RSA590196  Dodecatheon hendersonii Michael A. Vincent, Robert M. Rhode 1996-3-30 7298 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  UC1613493  Dodecatheon hendersonii Charles M. Belshaw 1937-4-25 2852 Colusa Vicinity of Cook's Spring Devil's Ridge, Inner North Coast Range Comment
  UCD162980  Dodecatheon hendersonii Craig D. Thomsen 2002-2-7 2562 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.2 miles west of Hwy 20/16 intersection, west end of large turnout. 345 Comment
  UCD56911  Dodecatheon hendersonii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3514 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  CHSC29749  Downingia bella K. R. Stern 1980-6-1 6638 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  JEPS18023  Downingia insignis George B. Rossbach 1955-4-9 512 Colusa 3 mi e Maxwell; Sacramento Valley 18 Comment
  JEPS5035  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa College City Comment
  RSA261511  Downingia pulchella L. L. Ferwerda 1968-5-4 17 Colusa In Bear Valley, ca. 11 miles NW of State hwy 20. 409 Comment
  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
  CHSC112645  Dysphania botrys Lowell Ahart 2013-10-1 19087 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC94397  Echinochloa crus-galli Lowell Ahart 2006-8-22 13233 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725019  Echinochloa crus-galli L. Ahart 2006-8-22 13215 Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD32928  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa Colusa County, 4.5 miles south of Grimes. Comment
  UCD60898  Echinochloa crus-galli K. Esau and D. Hartman 1941-7-17 Colusa Near Williams. Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CDA186  Echinochloa oryzicola P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 Comment
  UCD34846  Echinochloa oryzicola Beecher Crampton 1963-9-9 6892 Colusa 1/4 mile E of Cortena. Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. Comment
  CDA184  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 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
  RSA518796  Echinodorus berteroi Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8879 Colusa NW side of East Park Reservoir near end of East Park Road form Stonyford. 366 Comment
  UCD137951  Echinodorus berteroi C. F. Dunshee 1922-1 3 Colusa Cortina. Comment
  UCD137952  Echinodorus berteroi P. B. Kennedy 1925-9-1 s.n. Colusa Cortina. Comment
  UC1100591  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa rice fields 3 mi W of Williams Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  CAS-BOT-BC113364  Eleocharis engelmannii Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles. Comment
  CAS-BOT-BC113365  Eleocharis engelmannii Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles. 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
  SD225710  Eleocharis macrostachya Carol Witham, Jennifer Buck 2001-4-30 156 Colusa 2 miles south of the town of Clusa alng Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 Comment
  UC1100742  Eleocharis macrostachya Herbert L. Mason, Verne Grant 1946-8-6 12965 B Colusa 4 mi S of Colusa (pond on Colusa - Marysville Highway, W side of Sacamento River) Comment
  UCD49740  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Colusa County, California. Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  UCD57290  Eleocharis macrostachya Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3661 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 319 Comment
  UCD163346  Eleocharis parishii Craig D. Thomsen 2000-5-11 2352 Colusa Walker Ridge. Buck Flat. 129 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
  SBBG83315  Elymus elymoides L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  UCD61431  Elymus elymoides Beecher Crampton 1958-5-19 4815 Colusa Little Stony Creek Canyon 4-8 miles west of Lodoga. Comment
  UCD61526  Elymus elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 548 Comment
  CAS-BOT-BC247093  Elymus glaucus Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5673 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 869 Comment
  JEPS75758  Elymus glaucus subsp. glaucus L. R. Heckard and R. Bacigalupi 1976-9-6 4441 Colusa just e Fouts Camp; Snow Mtn. 1859 Comment
  UCD67001  Elymus multisetus Craig D. Thomsen 2008-5-23 2738 Colusa BLM Payne Ranch. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  UC1795019  Elytrigia elongata R. K. Brummitt 1997-6-11 19696 Colusa 1 km W of Colusa on Route 20 100 Comment
  CDA15477  Elytrigia intermedia subsp. intermedia G. F. Hrusa, T. D. Wilfred 1998-6-19 14614 Colusa North Coast Ranges; Small colony on roadside and up into edge of Adenostoma/Quercus berberidifolia chaparral, above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Infestation in distinct clumps. Comment
  JEPS80822  Epilobium L. R. Heckard and J. C. Hickman 1981-7-31 5792 A Colusa e side of mt. Snow Mt., Dark Hollow Creek 1584 Comment
  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
  UC71878  Epilobium brachycarpum H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCR205141  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14246 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD81376  Epilobium canum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5403 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just west of the mouth of canyon (inside the canyon) that is located south of Brophy Canyon. 266 Comment
  UCD164146  Epilobium ciliatum Craig Thomsen 1997-6-21 1931 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. Comment
  JEPS80784  Epilobium ciliatum subsp. ciliatum L. R. Heckard and J. C. Hickman 1981-7-30 5757 Colusa se side of mt. Snow Mt., Trout Creek 1600 Comment
  CHSC94526  Epilobium ciliatum subsp. glandulosum Lowell Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724966  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  JEPS75736  Epilobium densiflorum L. R. Heckard 1974-9-9 3878 Colusa about 1/4 mi e Foutch Camp 1828 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
  JEPS86627  Epilobium foliosum L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6709 Colusa 0.5 mi ne Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1640 Comment
  CHSC112253  Epilobium minutum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18649 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC27709  Epilobium minutum Tim Spira; Robert A. Schlising 1978-5-13 3232 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC94885  Epilobium minutum Lowell Ahart 2006-6-11 12679 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UC638664  Epilobium minutum Ethel Crum 1938-5-7 2018 Colusa 4.2 mi n Rumsey (summit of ridge); Inner North Coast Range, Comanche Hills 254 Comment
  UCD164046  Epilobium minutum Richard Philbrook 2016-4-9 4 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. Northeast facing slopes of hill. 343 Comment
  UCD106510  Epilobium minutum Linda A. Bell 1975-4-27 79 Colusa Barlett Springs Road, 1.5 miles E of Bear Valley Road. 609 Comment
  CHSC101430  Epilobium nivium David Isle 1990-6-6 1527 Colusa On Lower Summit Valley Rock Outcrop W of Rd 17N10. 1682 Comment
  JEPS75757  Epilobium torreyi L. R. Heckard and R. Bacigalupi 1976-9-6 4440 Colusa just e Fouts Camp (e side of meadow); Snow Mt. 1859 Comment
  UCSB4278  Epilobium torreyi Keator, Glenn 1958-6-17 Colusa Not far from Bartlett Springs in the foothills Comment
  CDA15465  Epipactis gigantea G. F. Hrusa, WTD 1998-6-19 14602 Colusa North Coast Ranges; Little Stony Creek. Goat Mtn. Rd. ~ 1 km. W of intersection with Lodoga-Stonyford Rd. Comment
  CHSC106240  Epipactis gigantea B. Castro; L. P. Janeway 2001-6-3 1257 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. At upper edges of meadow. 880 Comment
  UC1051746  Epipactis gigantea Helen K. Sharsmith 1953-6-21 4302 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes ca 1 mi within boundary of Forest) 670 Comment
  CAS-BOT-BC58046  Equisetum Roxana Stinchfield 1916-7-11 430 Colusa Sycamore Slough Road. Comment
  RSA724896  Equisetum laevigatum L. Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS120803  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 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
  RSA129661  Eragrostis hypnoides H. S. Yates 1936-8-14 6139 Colusa 3 miles S. of Grimes 15 Comment
  SD262162  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Sacramento Valley Foothills: west side East Park Reservoir, 0.3 mile south of boatlaunch. Drying lake bed, c 100 yds east of normal lake edge. 49 Comment
  UC1100248  Eragrostis hypnoides Herbert L. Mason 1945-9-19 12717 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway Comment
  UC188873  Eragrostis hypnoides H. P. Chandler 1905-9-14 Colusa Princeton Comment
  JEPS108911  Eremocarpus 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
  JEPS110107  Eremocarpus setiger Lowell Ahart 2006-8-9 13114 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR261635  Eriastrum abramsii Ann Howald 2003-5-29 2344 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
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Dec 15 2016
  UCR261668  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
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Dec 15 2016
  CHSC92674  Eriastrum brandegeeae David Toren 2002-6-19 1241 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Auk Auk Ridge in 2001 Trough Fire Area. 731 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
  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
  SEINET4208167  Ericameria linearifolia Richard R. Halse 2013-3-26 8742 Colusa Along the Leesville-Logoda Road ca. 5.5 miles south of Logoda, or 3.2 miles north of the junction of the Leesville and Bear Valley Roads; Indian Valley.; 0 426 Comment
  SEINET251843  Erigeron L. Shultz, J. Shultz 1986-9-20 10226 Colusa 10 miles west of Colusa on Highway 20 Comment
  CHSC94392  Erigeron bonariensis Lowell Ahart 2006-8-22 13225 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  JEPS73515  Erigeron petrophilus var. petrophilus L. R. Heckard 1972-7-10 3133 Colusa overlooking and 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  JEPS80811  Erigeron petrophilus var. petrophilus L. R. Heckard and J. C. Hickman 1981-7-31 5784 Colusa e side Snow Mt. (rock promontory called Fouts Springs Overlook); , Fouts Springs Overlook 1798 Comment
  CHSC77302  Erigeron sumatrensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  POM257160  Eriodictyon californicum Lincoln Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony creek 2.5 miles E of Bonnie View, Inner N Coast Ranges 518 Comment
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  CHSC92835  Eriogonum dasyanthemum D. Isle 2000-6-7 1245 Colusa Mendocino National Forest -- North Coast Ranges Little Stony Creek Watershed. Junction of Frenzel Creek with Little Stony Creek Road. 426 Comment
  OBI6297  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  RSA0118881  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD55455  Eriogonum dasyanthemum Ellen Dean; Gordon Harrington 2006-10-6 3279 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
  UCD66684  Eriogonum dasyanthemum Craig D. Thomsen 2000-5-11 2311 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  OBI47577  Eriogonum dasyanthemum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi W of Mendocino NF boundary on Stony Crk rd 671 Comment
  UCD100311  Eriogonum luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa near Glenn County line, at Goat Mountain Lookout, just below summit of Goat Mountain. 1865 Comment
  CAS-BOT-BC270977  Eriogonum nervulosum Roger Raiche 1985-7-27 50667 Colusa W of Lodoga, Goat Mt. Rd. area, headwaters of Frenzel Creek 707 Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 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
  CHSC33915  Eriogonum strictum var. greenei James Jokerst 1980-8-6 1048 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
  JEPS75747  Eriogonum strictum var. greenei L. R. Heckard, and R. Bacigalupi 1976-9-6 4422 Colusa above Summit Springs (along trail to Fout's Camp); Colusa-Lake County Line, Snow Mt. 1645 Comment
  SBBG83902  Eriogonum tripodum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  CHSC117782  Eriogonum tripodum David Isle; Terril Wolt 2016-6-16 2164 Colusa North Coast Range: 3/4 mi NE of Fouts Springs and 1/4 mi WNW of Davis Flat on greenish, rocky serpentine ridge. 549 Comment
  CAS-BOT-BC267476  Eriogonum umbellatum Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5032 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp 1989 Comment
  CHSC92594  Eriogonum umbellatum var. bahiiforme David W. Isle 2005-8-1 1155 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile South of Goat Mountain lookout. 1804 Comment
  JEPS73454  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1972-7-8 3054 Colusa n side of ridge running se Snow Mt., West Peak 1981 Comment
  JEPS75864  Eriogonum umbellatum var. bahiiforme L. R. Heckard 1974-9-10 3884 Colusa base of rocky cliff along spur running se West Peak (East Circle Trail); Snow Mt. 2011 Comment
  CHSC32219  Eriogonum umbellatum var. smallianum James Jokerst 1980-8-6 1054 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  CHSC46877  Eriogonum wrightii var. trachygonum Vernon Oswald 1989-9-12 4010 Colusa Goat Mtn Rd 0.4 mi sw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. 390 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
  SEINET7096744  Eriophyllum lanatum A. G. Vestal 1955-4-5 3673 Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  UCR44912  Eriophyllum lanatum L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Rd, 2.2 mi. west of Mendocino National Forest boundary, NE of Clear Lake 678 Comment
  CAS-BOT-BC308098  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  CDA15503  Eriophyllum lanatum var. achilleoides G. F. Hrusa, WTD 1998-6-19 14640 Colusa North Coast Ranges; Trough Springs ridge, immed. above (overlooking settlement) Fouts Springs. Comment
  HSC66004  Eriophyllum lanatum var. achilleoides Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 39 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  RSA755891  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCD67054  Eriophyllum lanatum var. achilleoides Craig D. Thomsen 2008-5-31 2760 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. Along Hwy 16, ca. 1 mile south of Hwy 20. Near Cowboy Camp. 0.25 mile west of Bear Creek and public viewing area. 305 Comment
  JEPS34737  Eriophyllum lanatum var. achilleoides W. L. Jepson 1938-6-9 18962 Colusa mountains between Indian Valley, Lake County, and Bear Valley, Colusa County (Complexion Canyon, hillslope); Complexion Canyon 579 Comment
  RSA60339  Eriophyllum lanatum var. achilleoides G. R. Campbell 1948-6-18 651 Colusa 2 miles south of Wilbur Springs Comment
  UC1718073  Eriophyllum lanatum var. achilleoides John S. Mooring 1968-5-24 2066 Colusa Road from Leesville to Bartlett Springs, at lake-Colusa line Comment
  CHSC62894  Erodium botrys Vernon H. Oswald 1994-3-14 5992 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, in the parking area in the NE corner of Tract 41. 25 Comment
  UCD163220  Erodium botrys Craig D. Thomsen 2000-4-28 2210 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.75 mile west of Hwy 20/16 intersection. 345 Comment
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. Comment
  SEINET8526911  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  UCR212363  Erodium cicutarium Craig D. Thomsen 2000-3-31 2083 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  HSC31597  Erodium cicutarium Thomas E. Higley 1974-5-5 86 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  UC73402  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City, Sacramento Valley); Sacramento Valley Comment
  CHSC91560  Eryngium aristulatum D. Isle 1995-7-12 397 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. BLM land S off Cook Springs. 548 Comment
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  CAS-BOT-BC40755  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. 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
  RSA101910  Erysimum capitatum var. capitatum G. B. Rossbach, Ruth P. Rossbach 1938-5-31 851 Colusa About 18 miles W of Williams. Comment
  CHSC1751  Erythranthe bicolor L. Oliver 1935-5-3 Colusa Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  SEINET13725698 Image available Erythranthe nasuta A. A. Heller 1940-1 15619 Colusa Four miles north of Maxwell Comment
  UCD57300  Eschscholzia caespitosa Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3671 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  UCD63022  Eschscholzia caespitosa Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4674 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-BC402660  Eschscholzia caespitosa Brandegee 1889-4-1 s.n. Colusa Unspecified Comment
  CAS-BOT-BC5882  Eschscholzia caespitosa Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  RSA293185  Eschscholzia caespitosa subsp. caespitosa J. P. Smith, Tom Nelson, Jane Nelson 1978-4-2 9560 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  JEPS51725  Eschscholzia californica Alice King June 1906 Colusa College City Comment
  UC630427  Eschscholzia californica Annetta Carter 1938-5-8 1392 Colusa 5.5 mi s Leesville (on Wilbur Springs rd); Inner North Coast Range, Bear Valley 426 Comment
  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
  CAS-BOT-BC402978  Eschscholzia californica Roxana S. Ferris 1917-4-14 603 Colusa 3 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  RSA590194  Eschscholzia californica subsp. californica Michael A. Vincent, Robert Rhode 1996-3-30 7295 Colusa Along Bear Valley Road, 7.1 miles north of junction with Wilbur Springs Road. Comment
  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
  CHSC64613  Euphorbia spathulata Vernon H. Oswald; Margie McNairn 1995-4-23 6680 Colusa Inner North Coast Ranges. Along a roadside ditch bordering Bear Valley Rd. s of Brim Rd. (Bartlett Springs Rd.), w of Williams. 417 Comment
  CHSC70979  Euphorbia spathulata Vernon Oswald; Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  SEINET4673877  Euphorbia spathulata Richard R. Halse 2013-3-27 8760 Colusa Along State Hwy. 20 just east of the Colusa/Lake county Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53.; 0 558 Comment
  UCD164032  Euphorbia spathulata Indya Messier 2016-4-9 6 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella flat. 553 Comment
  UCD57049  Euphorbia spathulata Gordon Harrington; Diana Hickson 2007-4-7 14 Colusa BLM Payne Ranch, SW of intersection Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. 499 Comment
  UCD82503  Euphorbia spathulata Craig Thomsen; G. Harrington 2009-5-12 2863 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD57295  Extriplex joaquinana Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3666 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD63021  Extriplex joaquinana Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4673 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  JEPS75748  Festuca californica L. R. Heckard and R. Bacigalupi 1976-9-6 4423 Colusa above Summit Springs (along trail to Fouts Camp, Colusa-Lake County line); Snow Mt. 1645 Comment
  CHSC112210  Festuca microstachys var. pauciflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS80773  Festuca roemeri L. R. Heckard and J. C. Hickman 1981-7-30 5746 Colusa se side Snow Mt. (Trout Creek Trail) 1661 Comment
  JEPS81290  Festuca roemeri L. R. Heckard and J. C. Hickman 1982-7-5 5902 Colusa s of Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UCD84436  Ficus carica Jack Alderson 2009-4-8 30 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  UCD112807  Frangula californica subsp. crassifolia Beecher Crampton 1958-5-19 4818 Colusa along Little Stony Creek, 4 - 5 miles west of Lodoga. Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  HSC48172  Frangula californica subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD58175  Frangula californica subsp. tomentella Gordon Harrington 2007-5-31 67 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  CHSC107282  Frankenia salina L. P. Janeway; B. Castro 2011-7-9 10508 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. 54 Comment
  CHSC52632  Frankenia salina James Jokerst 1985-4-24 2495 Colusa Near Lurline Creek. 41 Comment
  CAS-BOT-BC223368  Fraxinus dipetala Mrs. H. C. Cantelow 1936-4-11 1193 Colusa Bear Creek Comment
  CAS-BOT-BC223490  Fraxinus latifolia Roxana S. Ferris 1917-4-17 616 Colusa Sycamore Slough Comment
  JEPS95500  Fritillaria affinis Vernon H. Oswald and L. Ahart 1994-3-23 6013 Colusa T17N R6W NW1/4 Sec. 32, 1700 ft, Chaparral. Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford 518 Comment
  UCD110806  Fritillaria affinis Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD58106  Fritillaria affinis Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3353 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. 560 Comment
  UCD139660  Fritillaria agrestis S. W. Winter 1927-3-9 751 Colusa Arbuckle. 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
  CAS-BOT-BC130432  Fritillaria pluriflora Gladys L. Smith 1978-3-18 4800 Colusa Bear Valley, on Wilbur Springs Road Comment
  CAS-BOT-BC130433  Fritillaria pluriflora James Jokerst 1985-4-10 2229 Colusa Near Walker Ridge Comment
  CAS-BOT-BC130434  Fritillaria pluriflora Barbara Menzies; Arthur Menzies 1967-3-18 s.n. Colusa 10 mi. north of Highway 20 (Bear Valley), 5 mi. north of Wilbur Springs cut-off Comment
  CAS-BOT-BC130435  Fritillaria pluriflora Robert F. Hoover 1939-3-5 3901 Colusa Two miles south of Stonyford Comment
  CHSC26609  Fritillaria pluriflora D. W. Isle 1978-3-3 1501 Colusa Stonyford Cemetary Lane ca. 1.5 mi w of Stonyford, s of Fouts Springs Road. 365 Comment
  HSC33041  Fritillaria pluriflora Thomas W. Nelson, James Nelson 1975-3-26 1772 Colusa Beside rd. to Bear Valley 7 mi. N of junction with Hwy. 20 Comment
  JEPS100637  Fritillaria pluriflora Dean W. Taylor 1992-4-16 12400 Colusa East Park Reservoir, ca. 0.4 mi due W from spillway into Little Stony Creek Inner North Coast Range 411 Comment
  JEPS42811  Fritillaria pluriflora Wayne Roderick 1966-3-26 Colusa 1/2 mi e of Robbers Flat (adjacent to Bartlett Springs Road, Bear Valley); Bear Valley 417 Comment
  JEPS55682  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  JEPS89227  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  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
  UCD139703  Fritillaria pluriflora Dora Hunt; Mas Yumaguchi, Doran Hughes 1965-3-8 s.n. Colusa ca. 1/8 mile south of Lodoga on road to Leesville. Comment
  UCD80816  Fritillaria pluriflora Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5272 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SE-facing slope above trail that links Thompson and Craig Canyons. 484 Comment
  UCR261615  Fritillaria pluriflora Ann Howald 2003-3-11 2276 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga 365 Comment
  HSC59112  Fritillaria purdyi Terry Roth 1979-4-14 10 Colusa 1067 Comment
  SDSU20636  Fritillaria recurva Sean Ryan, Michael G. Simpson 2010-6-21 56 Colusa NW facing slope on north side of Forest Road 16N02. Approximately 0.23 miles NE of intersection with Forest Road 16N03. SW of Black Oak Campground, NNW of Goat Mountain. Mendocino National Forest. 1692 Comment
  UCD66537  Galium andrewsii Craig D. Thomsen 2001-5-24 2496 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS121119  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-5-1 18694 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS52784  Galium andrewsii subsp. andrewsii Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4356 Colusa Bartlett Springs road 2.5 mi w Leesville (1.8 mi w of junction with Bear Valley Rd, w-facing slope) 530 Comment
  UCD81217  Galium andrewsii subsp. andrewsii Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5554 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destinella Flat area on the S side of Hwy. 20. Ridge so the south of Destanella Flat. 522 Comment
  JEPS52809  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4355 Colusa Hwy 20 along creek 1 mi w junction with Highway 16; Bear Creek 329 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
  CHSC62945  Galium aparine Vernon Oswald; Lowell Ahart 1994-4-6 6062 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  JEPS95487  Galium aparine Vernon H. Oswald and L. Ahart 1994-4-6 6062 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
  UCD64439  Galium aparine Craig D. Thomsen 2000-3-31 2079 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212308  Galium aparine Craig D. Thomsen 2000-3-31 2070 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
  JEPS80809  Galium bolanderi L. R. Heckard and J. C. Hickman 1981-7-31 5781 Colusa rocky promontory called Fouts Spring Overlook Snow Mt. (e side of mt) 1783 Comment
  UC1229763  Galium bolanderi Francia Chisaki and Helen K. Sharsmith 1959-5-27 1335 Colusa at Mill Creek Crossing (road leading out of Red Bridge camp) Comment
  JEPS52876  Galium californicum subsp. californicum Lauramay T. Dempster and G. L. Stebbins 1967-10-13 4366 Colusa 1.6 mi se Fir Root Camp (nw ridge of mt., ne-facing slope); Goat Mountain Comment
  JEPS15231  Galium grayanum var. nanum G. Thomas Robbins with L. R. Heckard 1956-7-25 3720 Colusa summit Snow Mt. West (Lake-Colusa Co. boundary) 2145 Comment
  CHSC86129  Galium parisiense Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  JEPS110109  Galium parisiense Lowell Ahart 2006-8-9 13149 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS21477  Galium parisiense Francia Chisaki and Gene B. Newcomb 1958-6-19 1134 Colusa ca 3 mi w Stonyford (along path leading to the dam); Diversion Dam Camp Comment
  UCD66950  Galium parisiense Ellen Dean; Davis Botanical Society 2008-5-31 4995 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD56687  Galium porrigens Gordon Harrington 2007-3-25 6 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 572 Comment
  UCD66527  Galium porrigens Craig D. Thomsen 2000-4-28 2228 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Comment
  UCD163913  Galium porrigens var. porrigens Sara Martin 2016-4-9 5 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Hill to the south of corral at junction of 16 and 20. 464 Comment
  UCR227343  Galium porrigens var. tenue Craig D. Thomsen 2001-5-24 2457 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
  UCD121911  Galium porrigens var. tenue Elaine J. Imada 1971-4-10 15 Colusa East side of ridge; Bear Valley, Walker Ridge. Comment
  POM96840  Galium tricornutum E. Johnson 1926-5-5 s.n. Colusa [Unspecified] Comment
  CHSC48888  Galium trifidum var. pacificum Vernon Oswald 1984-7-20 1615 Colusa Lily Pond N of Letts Lake in Mendocino National Forest. 1280 Comment
  UCR261662  Galium triflorum Ann Howald 2003-5-5 2331 Colusa Inner North Coast Ranges, Little Stony Creek at crossing of Lodoga-Stonyford Road 379 Comment
  CDA12374  Garrya congdonii G. F. Hrusa 1996-1-2 12627 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  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
  CHSC22851  Garrya congdonii Robert A. Schlising 1962-1-31 2031 Colusa Coast Ranges. Along Stoney Creek. 441 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
  SBBG5330  Garrya congdonii H. and M. Dearing 1939-5-12 3331 A Colusa near Leesville 457 Comment
  RSA201851  Garrya flavescens subsp. congdonii Robert D. Slayback 1959-3-20 2 Colusa Near State Highway 16, six miles northwest of Rumsey. Comment
  CHSC107496  Garrya veatchii Ralph Minto 2010-1-29 1919 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Fouts Springs road. 609 Comment
  UCD66545  Gastridium phleoides Beecher Crampton 1958-5-19 4796 Colusa 10.1 miles southeast of Leesville. Comment
  JEPS76800  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  RSA0028445  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UC1613427  Gilia Charles M. Belshaw April 1937 2869 Colusa vicinity Cook's Spring (Devil's Ridge); Inner Coast Range, Devil's Ridge Comment
  UC1614445  Gilia Charles M. Belshaw 1937-4-25 2834 Colusa vicinity Cook's Spring (Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  UCD111675  Gilia capitata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley Comment
  JEPS108813  Gilia capitata subsp. capitata Lowell Ahart 2006-6-11 12676 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  CDA15474  Gilia capitata subsp. mediomontana G. F. Hrusa, WTD 1998-6-19 14611 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Comment
  HSC45794  Gilia tricolor J. P. Smith, Thomas W. Nelson 1976-4-14 8581 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  POM163453  Gilia tricolor Roxana S. Ferris 1926-4-23 6403 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UCD163665  Gilia tricolor Craig Thomsen 1999-4-15 1965 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  HSC72769  Gilia tricolor J. Krajanowski 1981-4-4 4 Colusa .3 mi. W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 18 mi. SW of Williams 322 Comment
  RSA388848  Gilia tricolor Virginia King 1975-4-20 9 Colusa Bear Valley Road, 8.7 miles north of State Highway 20 412 Comment
  SEINET5732133 Image available Gilia tricolor Mary Jane York 1969-1 12 Colusa In an open valley, soil dry, Bear Valley, 9.5 miles north of State Highway 20.; Bear Valley Comment
  SEINET5732135 Image available Gilia tricolor J. Maze 1971-1 869 Colusa About 1 mile from Stony Ford on road to East Gorge Reservoir.; Stony Ford Comment
  UCD15437  Gilia tricolor Lisa Montang 1985-4-13 5 Colusa California, Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  SEINET10464558  Githopsis specularioides King 1905-1 King s.n. Colusa College City 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
  CHSC84958  Glinus lotoides Lowell Ahart 2003-10-23 10668 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
  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
  CAS-BOT-BC434996  Glinus lotoides Roxana Stinchfield 1916-7-9 425 Colusa Along Sacramento River, Phillips Ranch near Sycamore. Comment
  UCD67068  Glyceria Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5096 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  CAS-BOT-BC303889  Gnaphalium palustre Roxana Stinchfield 1916-6-17 289 Colusa At Tule Levee, near College City Comment
  UCD162346  Grindelia camporum Chuck Hughes 2015-1-13 414 Colusa North side of Highway 20, just east of the I-5 interchange. 20 Comment
  UCD58174  Grindelia camporum var. camporum Gordon Harrington 2007-5-31 66 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 3/4 mile downstream from Road Kill Cafe. 357 Comment
  JEPS108720  Grindelia hirsutula Lowell Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UC727696  Grindelia hirsutula Milo S. Baker 1946-9-3 11582 Colusa towards Williams on Hwy 3 mi w Colusa Comment
  UC765013  Guillenia flavescens R. F. Hoover 1938-4-24 3222 Colusa Venado Comment
  UC71636  Guillenia lasiophylla Miss Alice King 1905-1 Colusa College City Comment
  UC1151670  Hainardia cylindrica Beecher Crampton 1958-5-19 4825 Colusa Alkaline depression along USHwy. 99-W, 4 miles south of Maxwell Comment
  UCD85147  Hainardia cylindrica Beecher Crampton 1958-5-19 4795 Colusa 10.1 miles southeast of Leesville, foothill area. Comment
  UCD85235  Hainardia cylindrica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CAS-BOT-BC230059  Harmonia hallii Ellen Dean; G. Harrington; K. Mawdsley; J. Shepard 2010-5-1 5966 Colusa Walker Ridge on border of Lake and Colusa Counties. Along Walker Ridge Rd., just E of Barrel Springs area 721 Comment
  JEPS96685  Harmonia hallii Dean W. Taylor 1998-6-23 16703 Colusa Walker Ridge, along BLM access road 929 Comment
  CDA34807  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Road, ~8.3 km N of jct. with Hwy. 20, ~1 km N of jct with Indian Valley Reservoir Rd., at road cut, both sides and adjacent slopes. Comment
  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
  CHSC117407  Helenium puberulum B. Castro; Tom Boullion 2009-6-26 1795 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  CAS-BOT-BC305505  Helianthus bolanderi Roxana Stinchfield 1916-7-11 431 Colusa Davis tule near Sycamore Slough Comment
  CHSC112644  Helianthus bolanderi Lowell Ahart 2013-10-1 19071 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC94313  Helianthus bolanderi Lowell Ahart 2006-8-9 13097 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  RSA126696  Helianthus bolanderi Peter H. Raven, Richard Snow 1959-9-11 14424 Colusa About 2 miles south-east of Happy Camp 762 Comment
  UCD55469  Heliotropium curassavicum Ellen Dean; Gordon Harrington 2006-10-6 3293 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
  UCD66875  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5078 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thomspon Creek headwaters and loops back to Ridge trail. Large, dammed stock pond, holding water still in middle of meadow. Comment
  UCR201552  Heliotropium curassavicum George K. Helmkamp, E. A. Helmkamp 2008-10-14 14261 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CDA20053  Heliotropium europaeum D. Brown 2002-10-4 PDR 019525 Colusa Northern California; Vicinity of Colusa 0 Comment
  JEPS104401  Helminthotheca echioides Lowell Ahart 2003-10-23 10661 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS86622  Hemizonella minima L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6702 Colusa 0.5 km w Summit Springs (sw flank of mountain, Colusa-Lake County line); Snow Mountain 1500 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
  UC194238  Hemizonia congesta subsp. luzulifolia H. M. Hall 1916-8-16 10268 Colusa near Williams (s to Vacaville) 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
  UCR141662  Hemizonia pungens subsp. septentrionalis Jerry Schmierer 1999-4-27 s.n. Colusa Sacramento Valley, Colusa County Comment
  CHSC76742  Hesperevax caulescens J. Marr; H. West, C. Warren 1998-4-14 Colusa NW of town of Sites, vicinity of Grapevine and Stone Corral Creeks. 158 Comment
  UC88271  Hesperevax caulescens B. 1889-1-1 Colusa Colusa Comment
  CHSC83314  Hesperevax sparsiflora Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 137 Comment
  UCD63873  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwys 16 and 20. Cowboy Camp area on the west side of Hwy 16, 1 mile south of Hwy 20. 0.25 mile west of public viewing area and Bear Creek. 305 Comment
  UCD63917  Hesperolinon californicum Craig D. Thomsen 2001-5-24 2506 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
  HSC96809  Hesperolinon disjunctum L. Ahart 2006-6-11 12675 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS110118  Hesperolinon disjunctum Lowell Ahart 2006-6-11 12675 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UC1212484  Hesperolinon disjunctum Helen K. Sharsmith 1952-6-21 4158 Colusa 0.9 mi e Cook Springs; Inner North Coast Ranges 518 Comment
  UC1212512  Hesperolinon disjunctum Herbert L. Mason 1946-5-31 12813 Colusa one mi e Lake County line (Bartlett Springs to Williams road); Inner North Coast Ranges 609 Comment
  UC1212518  Hesperolinon disjunctum Freed W. Hoffman 1947-6-20 1619 A Colusa road from Stoneyford to Fouts Springs; Inner North Coast Ranges, Mendocino National Forest 502 Comment
  UCD67057  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2752 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  UCR45096  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  UCR71414  Hesperolinon disjunctum H. K. Sharsmith 1965-6-23 5529 Colusa Inner North Coast Ranges, c. 1/4 mi. east of Cook Springs 534 Comment
  CAS-BOT-BC176220  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa One mile beyond Wolf Glade on spur road, drainage of Stoney Creek, Mendocino National Forest 609 Comment
  OBI12542  Hesperolinon disjunctum Rimo Bacigalupi, G. T. Robbins 1954-6-25 4622 Colusa 0.1 mi E of Lake county line and E of summit of rd from Bear Valley to Indian Valley 640 Comment
  RSA151821  Hesperolinon disjunctum H. L. Mason 1952-6-19 14301 Colusa Between Fouts Springs and Red Bridge Public Camp, Mendocino National Forest. Comment
  OBI12541  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa Inner North Coast Ranges. North cyn slope overlooking Cook springs 549 Comment
  UC1212303  Hesperolinon drymarioides Helen K. Sharsmith 1959-5-27 4694 Colusa serpentine hillside above Cook Springs; Inner North Coast Ranges 548 Comment
  UCD110522  Hesperolinon drymarioides P. Rodriguez-Rojo 1997-7-25 s.n. Colusa Walker Ridge Rd. 890 Comment
  UCR71415  Hesperolinon drymarioides H. K. Sharsmith 1965-6-23 5528 Colusa Inner North Coast Ranges, N canyon slope overlooking Cook Springs 549 Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD83448  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2888 Colusa Colusa County on Walker Ridge: Eaton Springs, about 1 mile east of Walker Ridge Road. 710 Comment
  RSA0072452  Heteromeles arbutifolia Michael A. Vincent, Robert M. Rhode 1996-3-30 7296 Colusa Along Brim Rd., 1.9 mi. W jct. Bear Valley Rd. Comment
  POM312312  Hibiscus H. L. Mason 1945-7-11 12649 Colusa Alkali plains near Butte Creek; Butte Lodge Outing Club, three miles above Colusa Comment
  UC1192277  Hibiscus lasiocarpos Herbert L. Mason 1945-7-11 12649 Colusa 3 mi above Colusa (plains near Butte Creek, Butte Lodge Outing Club) Comment
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  RSA725024  Hirschfeldia incana L. Ahart 2006-8-9 13155 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC320320  Holocarpha virgata Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Colusa. Coast Mts. North of San Francisco Bay Comment
  CHSC112623  Holocarpha virgata subsp. virgata Lowell Ahart 2013-10-1 19099 Colusa Inner North Coast Range. South end of the parking area, near strand of East Park Reservoir, about 2 miles (air) southeast of Stonyford, about 3 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 374 Comment
  RSA523605  Holocarpha virgata subsp. virgata Barbara Ertter, E. Neese, Laura Fujii, Dawn Espindola 1989-10-21 8875 Colusa NW side of East Park Reservoir near end of East Park Road form Stonyford. 366 Comment
  UC1563895  Holocarpha virgata subsp. virgata Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8875 Colusa near East Park Road from Stonyford (nw side of East Park Reservoir); East Park Reservoir 365 Comment
  UC194239  Holocarpha virgata subsp. virgata H. M. Hall 1916-8-16 10270 Colusa near Arbuckle Comment
  CAS-BOT-BC152578  Holodiscus discolor var. discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade about 3 miels west of Leesville Comment
  CHSC110423  Hordeum brachyantherum David Isle 1990-5-6 1982 Colusa Stony Creek Watershed. Pendell Ranch about 2 mi W of Co. Rd. 306 jct. with Fouts Springs Road; abt 150 yds south of Pendell home. 384 Comment
  UCD164138  Hordeum brachyantherum Craig Thomsen 1997-4-20 1927 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD20203  Hordeum brachyantherum J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 12.2 miles north of junction of Hwys 20 and 16. Comment
  UCD61443  Hordeum brachyantherum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3888 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1000 ft NW of parking lot. 339 Comment
  UCD70230  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Perennial plant communities close to serpentine temporal vernal pools. 370 Comment
  UCD85417  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC112029  Hordeum brachyantherum David Isle; Rhonda Isle, Justin Isle 1988-5-22 2098 Colusa Mendocino National Forest, Pendell Ranch, S of Fouts Springs Rd 18N01 (M10), ~2 miles W of Co. Rd. ~150 yds south of Pendel home. 384 Comment
  CHSC107983  Hordeum brachyantherum subsp. brachyantherum B. Castro; L. Janeway 2011-4-27 1864 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  JEPS81292  Hordeum brachyantherum subsp. californicum L. R. Heckard and J. C. Hickman 1982-7-5 5904 Colusa s side Snow Mountain (slope below (s of) area, Summit Springs); s side Snow Mountain, Summit Springs 1500 Comment
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  UCD162991  Hordeum depressum Craig D. Thomsen 2000-4-28 2182 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163711  Hordeum depressum Craig Thomsen 1999-5-10 2023 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD18853  Hordeum depressum Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 161 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
  POM197357  Hordeum marinum subsp. gussoneanum Le Roy Abrams 1928-5-8 12593 Colusa 2 miles south of Arbuckle 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
  UCD57281  Hordeum murinum subsp. glaucum Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3649 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  JEPS80063  Hydrophyllum occidentale L. R. Heckard and J. Hickman 1979-6-15 5069 Colusa saddle between e and w peaks Snow Mt. 2103 Comment
  UCD67029  Hydrophyllum occidentale Ellen Dean; Davis Botanical Society 2008-5-31 5012 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  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
  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
  UCD57282  Hypochaeris glabra Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3650 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
  UCD82460  Hypochaeris glabra Craig Thomsen; G. Harrington 2009-5-12 2838 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  RSA0013873  Ibicella lutea John H. Thomas 1960-8-29 8847 Colusa About 11 miles SW of Williams along Highway 20. Comment
  CHSC71008  Iris macrosiphon Vernon Oswald; Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Rd. 2.2 mi west of Bear Valley Rd., 0.7 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  JEPS80126  Iris tenuissima L. R. Heckard with J. Hickman 1980-7-1 5285 Colusa 10 mi w Stonyford (Summit Springs to Frog Lake, Snow Mt., Colusa-Lake County boundary); Snow Mt. 1706 Comment
  CDA19078  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958965 Colusa Sacramento Valley; At junction of I-5 Southbound and Hahn Rd, Williams. 0 Comment
  CDA19079  Isatis tinctoria R. Breckenridge, Kratville 2001-4-3 PDR 958964 Colusa Sacramento Valley; Near the junction of I-5 Southbound and Husted Rd, Williams. 0 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
  UCD82635  Juglans hindsii Jack Alderson 2009-9-19 31 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Along Bear Creek, SE of mouth of Craig Canyon. 304 Comment
  CHSC86837  Juncus balticus Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  UCD55449  Juncus balticus Ellen Dean; Gordon Harrington 2006-10-6 3274 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
  CHSC81326  Juncus bufonius var. congestus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  CHSC86963  Juncus bufonius var. congestus B. Castro; Michelle Cedarborg 2003-5-1 1425 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. In wet mud just downstream of pond at creek headwaters. 205 Comment
  JEPS110176  Juncus ensifolius Lowell Ahart 2006-8-9 13145 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS75719  Juncus ensifolius L. R. Heckard 1974-9-9 3850 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  JEPS75729  Juncus ensifolius L. R. Heckard 1974-9-9 3865 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  JEPS73444  Juncus howellii L. R. Heckard 1972-7-8 3039 Colusa ridge running se of Snow Mt., West Peak 2011 Comment
  JEPS80284  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5459 Colusa ne slope West Peak (cirque area between peaks); Snow Mt. 2011 Comment
  UCD18851  Juncus mexicanus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 159 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CDA39268  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges; At Candy Bucket Springs, on the south side of canyon of Stony Creek. Comment
  CHSC79616  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  UCD141759  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 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
  UCD63130  Juncus xiphioides Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4960 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
  CHSC116398  Juncus xiphioides David Isle 2014-6-7 2133 Colusa North Coast Range: About 1 mile south of Stonyford, California. On west bank of Salt Creek, just north of 2nd curve north of bridge on Dennis Drive. On David and Rhonda Isle property. (Waypoint is on Dennis Drive Bridge over Salt Creek.) 10 -0538832E, 4357208N. Comment
  UCR280794  Juncus xiphioides var. xiphioides David Isle 2014-6-7 2133 Colusa North Coast Range, c. 1 mile south of Stonyford, David and Rhonda Isle property. West bank of Salt Creek, just north of second curve north of bridge on Dennis Drive 366 Comment
  CHSC81201  Juniperus californica L. P. Janeway; B. Castro 2001-4-12 7017 Colusa Vicinity of Grapevine Creek, Funks Creek, and Antelope Valley. 158 Comment
  CHSC94282  Keckiella corymbosa Lowell Ahart 2006-8-9 13102 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  JEPS73503  Kelloggia galioides L. R. Heckard 1972-7-10 3121 Colusa near Trout Crossing of trail to Box Springs (Snow Mt.); Snow Mt. 1828 Comment
  UCR261653  Koeleria gerardi Ann Howald 2003-4-24 2321 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, spillway overlook 368 Comment
  CHSC107936  Lactuca saligna B. Castro; L. Janeway 2011-7-9 1892 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.25 mi northeast of Tehama-Colusa Canal. In N end of swale about 700 ft north of large +- alkaline marsh. 49 Comment
  CHSC80155  Lactuca saligna B. Castro; G. Kuenster 2000-7-19 1211 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low flat terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 39 Comment
  UCD66874  Lactuca saligna Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5077 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thomspon Creek headwaters and loops back to Ridge trail. Large, dammed stock pond, holding water still in middle of meadow. Comment
  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
  CAS-BOT-BC341396  Lagophylla minor R. F. Hoover 1968-5-27 11098 Colusa Bear Creek canyon n. of Highway 20 (near Wilbur Springs) Comment
  CHSC94692  Lagophylla minor Lowell Ahart 2006-6-11 12667 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS19942  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge betw. Venado and Leesville Comment
  JEPS94813  Lagophylla minor Vernon Oswald and Lowell Ahart 1998-5-7 8998 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
  UCD66589  Lagophylla minor Craig D. Thomsen 2000-4-28 2236 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
  UCD66601  Lagophylla minor Craig D. Thomsen 2000-5-11 2276 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66679  Lagophylla minor Craig D. Thomsen 2000-5-11 2303 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
  SBBG128767  Lagophylla minor L. Ahart 2013-5-1 18680 Colusa near a small drainage, N of the wash and State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  CHSC89865  Lagophylla ramosissima subsp. ramosissima B. Castro; L. Janeway 2001-4-12 1229 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Ck in hilly open blue oak woodland. In grassy understory on relatively flat ridgetop. 170 Comment
  CHSC77915  Lasthenia californica Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  HSC48034  Lasthenia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3939 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD23380  Lasthenia californica subsp. californica George C. Ziobro 1978-4-8 2 Colusa collected off of Bear Valley Road 10.3 miles north of the junction with State Route 20. 396 Comment
  POM53876  Lasthenia ferrisiae Roxana S. Ferris 1917-4-12 503 Colusa 4 miles east of Williams. Comment
  RSA31635  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 miles N of Maxwell. Comment
  CAS-BOT-BC353481  Lasthenia fremontii Roxana S. Ferris 1917-4-12 531 Colusa 4 miles E of Williams Comment
  CAS-BOT-BC352922  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa West side of Bear Valley Road, 11 miles (by road) north of junction with State Hwy 20 396 Comment
  JEPS118673  Lasthenia glaberrima B. Castro and L. P. Janeway 2011-4-27 1862 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  UC1535364  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa w side Bear Valley Road (11 mi (by road) n of junction with State Highway 20) 365 Comment
  SEINET5712846  Lasthenia glaberrima J. M. Tucker 1978-1 4408 Colusa West side of Bear Valley Road, 11 miles (by road) north of junction with State Hwy 20. 366 Comment
  UCD133750  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa On west side of Bear Valley Road, 11 miles (by road) north of junction with State Highway 20. 365 Comment
  HSC60475  Lasthenia glabrata J. P. Smith 1977-4-24 9041 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD163320  Lasthenia glabrata Craig D. Thomsen 1997-4-20 1919 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  CDA32830  Lasthenia glabrata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC90077  Lasthenia glabrata C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 45 Colusa 100 m off Bear Valley Rd., 1.2 mi. S of junction with Walker Ridge Rd. 409 Comment
  CHSC101593  Lasthenia glabrata subsp. glabrata David W. Isle; Rhonda Isle, Dorothy Lingerfelt 1998-4-19 1661 Colusa Mendocino National Forest; Keegan Ranch, adj. Bear Valley Road. MDB and M. Comment
  HSC92634  Lasthenia glabrata subsp. glabrata Eric B. Peterson, Thomas Ward, Matt Foruria 1995-4-1 55 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  JEPS35399  Lasthenia glabrata subsp. glabrata W. L. Jepson 1932-5-8 16283 Colusa Stonyford 365 Comment
  UCD66913  Lasthenia gracilis Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. Center of basin. 487 Comment
  UCD82464  Lasthenia gracilis Craig Thomsen; G. Harrington 2009-5-12 2841 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD67937  Lasthenia gracilis Nancy Vucinich 1978-4-8 8 Colusa Bear Valley, 10.3 miles N. of junction of Highways 16 and 20. Growing in open meadow, foothill woodland. Growing in clusters. Stems and leaves softly pubescent. Slender annual, yellow flowers. 396 Comment
  UCD80896  Lathyrus vestitus Ellen Dean; G. Harrington 2009-3-27 5296 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Along road that connects Lynch Canyon and the Ridge Trail on slope above road. 453 Comment
  HSC67099  Lathyrus vestitus subsp. vestitus Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 38 Colusa Bartlett Springs Rd. at stream crossing. Comment
  CHSC62933  Lathyrus vestitus var. vestitus Vernon H. Oswald; Lowell Ahart 1994-4-6 6070 Colusa Goat Mtn. Rd. 0.3 mi S of Sullivan Creek Bridge, SW of Digger Pine Flat, S of Stonyford. 487 Comment
  CAS-BOT-BC323884  Layia chrysanthemoides Tamara Gedik; Thom Heinz; Rebecca Siegle 1996-5-4 49 Colusa 1.3 miles S of Brim Rd., on Bear Valley Rd.; 12.4 mi on Walker Ridge Rd. from Hwy 20 to Brim Rd. 408 Comment
  CAS-BOT-BC323885  Layia chrysanthemoides Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 44 Colusa Along Bear Valley Rd. 1.2 miles S of the junction with Brim Rd. 414 Comment
  CAS-BOT-BC323902  Layia chrysanthemoides Ethel Crum 1938-5-8 2038 Colusa Bear Valley, 4 miles S of Leesville. 426 Comment
  CAS-BOT-BC323903  Layia chrysanthemoides Roxana S. Ferris 1926-4-23 6404 Colusa Roadside near Mountain House on Williams-Stonyford Road Comment
  CAS-BOT-BC323905  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  UC89163  Layia chrysanthemoides K. Brandegee Apr 1889 Colusa Leesville Comment
  UCD162975  Layia chrysanthemoides Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  CAS-BOT-BC323904  Layia chrysanthemoides Roxana S. Ferris 1917-4-12 506 Colusa 4 miles E of Willaims. Alkali Plains. Comment
  HSC62779  Layia chrysanthemoides Thomas Wood 1979-4-14 109 Colusa Bear Valley 396 Comment
  UCD15435  Layia chrysanthemoides Lisa Montang 1985-4-13 3 Colusa California, Colusa Co.; Bear Valley, 3.8 miles north of Wilbur Springs Road and Highway 20 intersection. 390 Comment
  CHSC27853  Layia fremontii Phil Blumert 1978-3-28 16 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
  HSC90060  Layia fremontii C. Baldwin, A. Hiss, P. Reynolds 1990-4-15 51 Colusa Bear Valley 409 Comment
  UCD15425  Layia fremontii Margit Sands 1985-4-13 28 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
Read comments
Apr 18 2009
  UC89185  Layia gaillardioides Katharine Brandegee Apr 1889 Colusa Leesville Comment
  CDA11407  Layia platyglossa G. F. Hrusa, K. van Katwyk 1995-4-22 12128 Colusa Inner North Coast Ranges; Bear Valley, 15 m. N of Hwy. 20. Comment
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  HSC92539  Layia platyglossa S. Morrissette, J. Williams, K. Kopper 1994-4-24 23 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  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
  UCD163306  Layia platyglossa Craig D. Thomsen 1997-4-20 1909 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  CDA8151  Layia platyglossa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 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
  UCD57078  Leersia oryzoides Beecher Crampton 1963-9-9 6888 Colusa 1/4 mile E of Cortena. 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
  POM312456  Lemna minuta H. L. Mason, Verne Grant 1946-8-6 12966 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of Sacramento River. Comment
  CHSC116664  Lemna trisulca Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20722 Colusa Small pond on the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  CAS-BOT-BC527293  Lemna trisulca J. M. Tucker; L. K. Mann; John Tothill 1959-5-30 3532 Colusa On small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 airline miles, north of Goat Mountain Lookout Comment
  CAS-BOT-BC527301  Lemna trisulca J. M. Tucker; L. K. Mann; John Tothill 1959-5-30 3532 Colusa On small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley and ca. 4 airline miles north of Goat Mountain Lookout Comment
  UC1101274  Lemna turionifera Herbert L. Mason, Verne Grant 1946-8-6 12966 Colusa 4 mi s of Colusa (w side of Sacramento River, on Colusa-Marysville Highway); Sacramento River Comment
  UCR225659  Leontodon taraxacoides Craig D. Thomsen, Gordon Harrington 2008-7-6 2777 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  CAS-BOT-BC88675  Lepidium acutidens A. A. Heller 1921-4-10 13542 Colusa Near Colusa. Comment
  UCD63714  Lepidium draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20. Comment
  UCR233291  Lepidium lasiocarpum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17134 Colusa Eastern foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 2.0 miles southeast of Sites 85 Comment
  CDA24916  Lepidium latipes D. Brown 1977-5-5 Colusa Terhel Farms Inc., Williams. 0 Comment
  UCD18852  Lepidium latipes Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 160 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CAS-BOT-BC89887  Lepidium nitidum Roxana S. Ferris 1917-4-19 694 Colusa Sycamore Slough, roadside. Comment
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. 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
  UC72926  Lepidium strictum Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CAS-BOT-BC273929  Leptochloa fusca subsp. fascicularis James Moffett 1928-10-1 s.n. Colusa 5 miles north of Colusa Comment
  HSC83422  Leptosiphon bicolor C. Pauls 1975-4-20 8 Colusa Bear Valley Rd., 8.7 mi. N of Hwy. 20 Comment
  RSA424704B  Leptosiphon bicolor Aaron Liston, M. A. Blumler 1987-4-26 667 -6 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD163206  Leptosiphon bicolor Craig D. Thomsen 2000-3-31 2048 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
  UCD163676  Leptosiphon bicolor Craig Thomsen 1999-4-15 1977 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC85934  Leptosiphon bicolor Michalski, Raum, Hopson 1987-4-12 61 Colusa Side of Leesville-Williams Rd. Comment
  RSA388851  Leptosiphon bicolor Eugene Tanimoto 1975-4-20 s.n. Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  UCD55171  Leptosiphon bolanderi Kim E. Steiner 1978-4-29 202 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  UCD55172  Leptosiphon bolanderi Kim E. Steiner 1978-4-29 202 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  UCR261753  Leptosiphon ciliatus Ann Howald 2003-5-29 2348 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
  HSC85857  Leptosiphon ciliatus Tim Tilghman, Rob Marheine, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  HSC48171  Leptosiphon filipes Thomas W. Nelson, Jane P. Nelson 1978-4-29 3935 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  RSA275358  Leptosiphon filipes Thomas W. Nelson, Jane P. Nelson 1978-4-29 3935 Colusa Along Bear Valley Rd. 2.5 miles from junction with State Route 20. 366 Comment
  HSC85855  Leptosiphon filipes Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  CAS-BOT-BC341799  Lessingia nemaclada T. S. Brandegee 1884-1-1 s.n. Colusa Mountain House Comment
  UCD66449  Lessingia nemaclada Craig D. Thomsen 2000-5-11 2295 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD66535  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CAS-BOT-BC341800  Lessingia nemaclada M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  JEPS94888  Lessingia ramulosa Vernon H. Oswald and Lowell Ahart 1998-7-15 9276 Colusa w side of county on Sawtelle Valley Road 0.4 mi n of Bartlett Springs Road; Sawtelle Valley Road 670 Comment
  RSA0118883  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  RSA758207  Lessingia ramulosa Doug Goldman 2005-7-23 3569 Colusa East side of Wilbur Springs Road, about 1.35 miles west of the intersection with Bear Valley Road and just east of Sulphur Creek. Wilbur Springs Resort. 415 Comment
  UCD55454  Lessingia ramulosa Ellen Dean; Gordon Harrington 2006-10-6 3278 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCD61472  Lessingia ramulosa Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3918 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UC88009  Lessingia ramulosa J. W. Blankinship Colusa near Epperson's 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
  JEPS80163  Lewisia triphylla L. R. Heckard with J. Hickman 1980-7-2 5314 A Colusa ca. 10 mi w Stonyford (first meadow n of summit of trail from Frog Pond to Milk Ranch; w of Snow Mt. West) 1950 Comment
  UC38247  Leymus triticoides J. Burtt Davy May, 1898 4290 Colusa near Princeton Comment
  UCD65629  Leymus triticoides A. A. Beetle 1946-6-27 4684 Colusa Wilber Springs. Comment
  JEPS75708  Lilium pardalinum Alice Q. Howard 1972-7-10 11 Colusa along trail between Fouts Camp and Box Springs (on n side of ridge separating Trout Creek and Paradise Creek); Snow Mountain 1600 Comment
  CHSC53964  Limnanthes douglasii subsp. nivea Vernon H. Oswald 1991-4-21 4517 Colusa Lodoga Stonyford Rd, ca. 2 mi south of Stonyford. Along drainages in pastures. 371 Comment
  UCD33937  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9168 Colusa Colusa County, 2 miles W.N.W. of Lodoga. Comment
  UC109406  Limnanthes douglasii subsp. rosea Brandegee April 1889 Colusa Colusa Junction Comment
  CDA11404  Linanthus ciliatus G. F. Hrusa, K. van Katwyk 1995-4-22 12125 Colusa Inner North Coast Ranges; Approx. 3 m. NW of Hwy 20 on Leesville Rd. Comment
  UCD33940  Linanthus dichotomus Beecher Crampton 1958-4-21 9172 Colusa 4 miles NW of Lodoga (by road). Comment
  HSC89737  Linanthus dichotomus subsp. meridianus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 11 Colusa Goat Mtn. Rd., 0.2 mi. Lodoga/Stonyford Rd. jct. 152 Comment
  UC125228  Linanthus filipes Katharine Brandegee Apr 1889 Colusa Leesville Comment
Read comments
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
  JEPS94194  Linanthus parviflorus Vernon Oswald and Lowell Ahart 1998-5-7 9006 .1 Colusa Bartlett Springs Rd. 2.1 mi. w. of Bear Valley Rd. and 0.8 m,i. e. of Sawtelle Valley & Grapevine Flat rds. 524 Comment
  UC200996  Linanthus parviflorus Brandegee 1889-1 Colusa Leesville Comment
  UCD83820  Linanthus parviflorus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5967 Colusa Walker Ridge on border of Lake and Colusa Counties, just E of Barrel Springs area along Walker Ridge Rd. 721 Comment
  JEPS86704  Linanthus rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6697 Colusa 0.5 km w Summit Springs (sw flank of mtn., Colusa-Lake County line); Snow Mtn. 1500 Comment
  UC1142700  Lithophragma 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
  UCD163884  Lithophragma affine Craig D. Thomsen 2002-4-10 2596 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  UCD58099  Lithophragma affine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3476 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  CHSC107938  Logfia filaginoides B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1887 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Ca 100 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CHSC112234  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Ranges. On the north side of the of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  JEPS121108  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa On the N side of the wash, N side of Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  RSA0118614  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Range. On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC638696  Logfia filaginoides Ethel Crum 1938-5-7 2009 Colusa summit of ridge 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  JEPS80876  Lolium perenne L. R. Heckard and J. C. Hickman 1980-7-3 5365 A Colusa sw slope Snow Mt. (grazed slopes about Summit Springs); sw slope of Snow Mt., about Summit Springs 1554 Comment
  RSA0011990  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCR233445  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCR206393  Lomatium George K. Helmkamp, E. A. Helmkamp 2009-3-11 14374 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCD15294  Lomatium Claire Warshaw 1985-4-10 13 Colusa along Bear Valley Road, 4.5 miles northwest form intersection with Highway 20. 390 Comment
  UCD80835  Lomatium californicum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5292 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. South side of canyon that is located to the north of Brophy Canyon. 274 Comment
  UCD82548  Lomatium californicum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5703 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  CHSC32224  Lomatium ciliolatum James Jokerst 1980-8-6 1052 Colusa Near Snow Mountain (West). Comment
  UCR261661  Lomatium dasycarpum Ann Howald 2003-5-5 2330 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 0.25 mile west of intersection with Lodoga-Stonyford Road 394 Comment
  UCD127631  Lomatium dasycarpum Kim E. Steiner 1978-4-29 197 Colusa southwest-facing slope, Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  UC71660  Lomatium dasycarpum subsp. tomentosum Miss Alice King 1905-1 Colusa College City Comment
  CHSC70858  Lomatium hooveri Vernon Oswald; Lowell Ahart 1998-4-21 8943 Colusa Stonyford-Logoda Rd. 3.7 mi south of Stonyford. 384 Comment
  RSA396711  Lomatium hooveri Michelle Stevens 1979-4-14 15 Colusa Buck Flat on Walker Ridge Road 884 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
  UC765513  Lomatium hooveri R. F. Hoover 1941-5-2 4987 Colusa just e. Lake Co. line (on Williams-Clear Lake hwy.) Comment
  UCD110811  Lomatium hooveri Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163312  Lomatium hooveri Craig D. Thomsen 1997-4-18 1901 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCR261643  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 mi northwest of intersection with East Ruby King Rd. 419 Comment
  UCSC010456  Lomatium hooveri Dylan M. Neubauer, Tim Forsell 2016-3-31 601 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 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
  CHSC42612  Lomatium macrocarpum Vernon Oswald 1986-3-25 1053 Colusa Fouts Springs Rd. (M10) at Diversion Dam Campground 3.4 mi w of Rd. 306. 411 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
  SEINET8693961  Lomatium macrocarpum R. R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 mi S of Logoda; Indian Valley. 425 Comment
  SEINET196147  Lomatium marginatum Robert F. Hoover 1941-5-2 4987 Colusa Just east of lake Coutny line on Williams Clear Lake highway Comment
  SEINET199389  Lomatium marginatum Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3172 Colusa 'Grapevine Grade' to Lodoga 7.7 miles west of Sites Comment
  CDA33696  Lomatium marginatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC763095  Lomatium marginatum var. purpureum R. F. Hoover 1938-4-24 3214 Colusa foothills w. Arbuckle (Sand Creek); Sand Creek Comment
  UC875215  Lomatium utriculatum Lewis S. Rose 1936-4-27 36180 Colusa 11 mi. n.w. Rumsey Comment
  UCD163304  Lomatium utriculatum Craig D. Thomsen 1997-4-7 1895 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD40909  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa 9 miles north of Hwy 20 on Bear Valley Road. About 100 yards into field on west roadside. Comment
  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
  CDA15501  Lotus grandiflorus G. F. Hrusa, Willie the Dog 1998-6-19 14638 Colusa North Coast Ranges; Below Fouts Springs on Fouts Springs Rd. to Stonyford. Immed. below Candy Bucket Spring crossing. Comment
  JEPS83028  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2236 Colusa about 5 mi w Stonyford (along Trough Spring Ridge road 0.5 mi sw of its junction with the Stonyford-Fouts Spring road); Trough Spring Ridge 731 Comment
  UCR71533  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2263 Colusa Along Trough Spring Ridge road 1/2 mi. SW of junction with theStonyford-Fouts Spring road (c. 5 mi. west of Stonyford). 732 Comment
  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
  RSA516411  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. Comment
  RSA424761  Lotus humistratus Aaron Liston, M. Blumler 1987-4-26 668 -6 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UC726262  Lotus humistratus A. A. Heller 1940-6-7 15714 Colusa e of Lodogo (on the Lodogo-Sites road, near the foot of the grade) Comment
  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
  UC454099  Lotus purshianus var. purshianus H. P. Chandler 1905-10-14 Colusa Princeton Comment
  RSA725014  Lotus unifoliolatus L. Ahart 2006-8-9 13150 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  UCD65955  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 67 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. Glenn-Colusa Irrigation District West Lateral Canal at western refuge boundary, public auto tour route. 13 Comment
  CHSC33400  Lupinus Rene T. Retuta 1978-4-4 8 Colusa Ca. 0.3 mi w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca 18 mi. sw of Williams. 579 Comment
  HSC66007  Lupinus albifrons Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 42 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UC71627  Lupinus albifrons Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC198402  Lupinus albifrons var. albifrons Roxana S. Ferris 1926-4-23 6422 Colusa Summit of grade Williams-Stonyford Road Comment
  RSA783302  Lupinus albifrons var. albifrons R. R. Halse 2010-3-21 7830 Colusa Along State Hwy 20 ca. 10.7 miles SW of its junction with Interstate Hwy 5 at Williams. In Salt Canyon. 154 Comment
  CHSC62843  Lupinus albifrons var. collinus Vernon H. Oswald; Lowell Ahart 1994-3-23 6022 Colusa Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford. 490 Comment
  JEPS22986  Lupinus albifrons var. collinus Stanton A. Cook 1959-5-30 891 Colusa n of the summit Goat Mountain; n of the summit of Goat Mountain 1828 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
  SD58255  Lupinus albifrons var. collinus Stanton A. Cook 1959-5-30 891 Colusa Ridge below and to the north of the summit of Goat Mountain. 1829 Comment
  HSC44466  Lupinus bicolor R. York 1978-4-22 138 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC48044  Lupinus bicolor Thomas W. Nelson, Jane P. Nelson 1978-4-29 3938 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  HSC89740  Lupinus bicolor B. Hoffman, A. Eller, A. Smith 1989-4-15 24 Colusa Off Bear Valley Rd., 1.2 mi. S of Brim Rd. 396 Comment
  SBBG128983  Lupinus bicolor G. K. Helmkamp, E. A. Helmkamp 2011-4-1 17131 Colusa Antelope Valley, along Maxwell-Sites Rd, 0.4 mi SE of Sites 93 Comment
  UC764136  Lupinus bicolor R. F. Hoover 1938-4-24 3219 Colusa w Arbuckle (Sand Creek foothills); Sand Creek foothills 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
  RSA60349  Lupinus densiflorus var. aureus G. R. Campbell 1948-6-18 650 Colusa 2 miles south of Wilbur Springs Comment
  HSC90950  Lupinus densiflorus var. densiflorus C. Elder, J. Reyes, S. Samuels 1993-4-17 70 Colusa Leesville Rd. 4.2 mi. E of jct. with Leesville-Lodoga Rd., 10 mi. jct. with Hwy. 20 488 Comment
  UC84449  Lupinus formosus Katharine Brandegee April 1889 Colusa Epperson's Comment
  POM276455  Lupinus formosus var. robustus Lyman D. Benson 1933-4-16 4335 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  SEINET10485385 Image available Lupinus formosus var. robustus A. Arthur Heller 1940-4-21 Heller 15543 Colusa Plentiful in fields and along the highway 2 miles south of Williams. Upper Sonoran Life Zone. Comment
  UCD107811  Lupinus grayi Tammy S. Smith 1985-4-13 10 Colusa ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18.0 mi sw of Williams. 321 Comment
  UCD66957  Lupinus latifolius var. latifolius Ellen Dean; Davis Botanical Society 2008-5-31 5001 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1099 Comment
  CHSC106710  Lupinus luteolus Barbara Ertter 1989-7-1 8616 Colusa Road to Goat Mt Lookout, 0.4 mi S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1371 Comment
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  CDA27487  Lupinus microcarpus var. densiflorus L. Ahart 2003-7-14 10390 Colusa On the east and west sides of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. Comment
  CHSC42238  Lupinus microcarpus var. densiflorus Steve Holloway 1986-4-5 4 Colusa Salt canyon, s 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
  OBI56806  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  SEINET239852  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1 /20 Colusa Roadside Ladoga-Leesville Road. 4.4 miles north of Leesville. 457 Comment
  UCD66534  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-6-23 2421 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCR212341  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  UCD33935  Lupinus nanus Beecher Crampton 1958-4-21 9166 Colusa 1 mile west of Lodoga. 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
  HSC72173  Lupinus succulentus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9550 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  SD239748  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites. 92 Comment
  SEINET5586445  Lupinus succulentus Richard R. Halse 2013-1 8736 Colusa Along the Leesville Road ca. 1. 8 miles northwest of its junction with State Hwy. 20, west of Williams. 85 Comment
  SEINET7096535 Image available Lupinus succulentus Richard R. Halse 2001-3-22 5947 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  UCR206293  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14735 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  CHSC115620  Lupinus succulentus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2152 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  RSA276282  Lupinus vallicola subsp. apricus Lyman D. Benson 1935-3-27 6333 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  SEINET10490294  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 Nelson 3963 Colusa Along bear valley rd. 2.5 Mi from jct with state route 20. Oak woodland. 366 Comment
  UCD124975  Lycopus americanus Collector Unknown Date Unknown s.n. Colusa Exact location unknown. Comment
  CHSC107290  Lythrum californicum L. P. Janeway; B. Castro 2011-7-9 10509 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.5 km southeast of Funks Reservoir and 0.1-0.6 km northeast of Tehama-Colusa Canal. Edges of swale feeding south side of the marsh; at the only spot of bulrush. 49 Comment
  JEPS110112  Lythrum californicum Lowell Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  SBBG119884  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  UCD102989  Lythrum californicum Dick Johnson 1977-6-15 s.n. Colusa West of Williams rangeland. Comment
  CDA37495  Lythrum californicum D. Brown 1977-5-31 s.n. Colusa Near Williams. 0 Comment
  CHSC86827  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC86838  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  RSA0015862  Lythrum hyssopifolia L. Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 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
  RSA0015853  Lythrum hyssopifolia Roxana Stinchfield 1916-6-17 286 Colusa At Tule levee, College City. Comment
  CHSC94480  Lythrum tribracteatum Lowell Ahart 2006-8-9 13162 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1619949  Lythrum tribracteatum Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 365 Comment
  UCD66865  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5068 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UCD67069  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5097 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  UCD67079  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5103 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  HSC5967  Madia citriodora D. R. Junell 1965-4-18 24 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  JEPS110182  Madia elegans subsp. densifolia Lowell Ahart 2006-8-22 13229 Colusa N side and under the bridge across Stony Creek, just N of Stonyford. 347 Comment
  CHSC27631  Madia exigua Timothy Spira; Robert Schlising 1978-5-13 3239 Colusa Just E of Lake County line, along Hwy 20. Comment
  RSA755624  Madia exigua George K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCD57855  Madia exigua Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 43 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  UCD66603  Madia exigua Craig D. Thomsen 2000-5-11 2277 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
  UCD66450  Madia gracilis Craig D. Thomsen 2000-5-11 2296 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
  UCD67039  Madia gracilis Ellen Dean; Davis Botanical Society 2008-5-31 5019 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 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
  CAS-BOT-BC334716  Madia gracilis Bruce G. Baldwin 1985-6-1 483 Colusa 3.2 miles norht of junction with California State Highway 20 along Bear Valley Road Comment
  JEPS83808  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  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
  SEINET7075568  Madia nutans 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
  UC725449  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa below the road near the foot of the grade e Lodoga; Sites-Lodoga road Comment
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Sep 25 2006
  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
  JEPS121749  Malacothamnus fremontii David Isle, Ronda Isle 2013-6-23 2044 Colusa COLUSA County, CA. Just E of Maxwell Grade Summit and pass; hot burned S aspect slope N of Sites Lodoga Road. (At Grapevine Pass). Comment
  RSA0119054  Malacothamnus fremontii David Isle, Frank Elliott 2014-6-11 2134 Colusa Northern Sacramento Foothills: Frank and Judy Elliott Ranch, ~1 mile S of Rail Canyon Rd. Jct. with Sites-Lodoga Rd. and ~1/2 mile S of Sites-Lodoga Rd. SE of Elliott home. (GPS for Rail Canyon Rd. Jct/ Sites-Lodoga Rd.) Comment
  JEPS36621  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek Comment
  UCD83450  Malacothrix clevelandii Craig Thomsen; G. Harrington 2009-5-12 2826 Colusa Colusa County on Walker Ridge: About 200 yards south of spur road enroute to Eaton Springs from Walker Ridge Rd. ( About 1/2 mile east of Walker Ridge Road) 822 Comment
  CDA11410  Malacothrix floccifera G. F. Hrusa, K. van Katwyk 1995-4-22 12131 Colusa Inner North Coast Ranges; Leesville Rd. at summit of ridge immed. E of N end of Bear Valley. Comment
  CHSC27632  Malacothrix floccifera Timothy Spira; Robert Schlising 1978-5-13 3237 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC27868  Malacothrix floccifera Robin Ondricek 1978-4-8 5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  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
  UC1613354  Malacothrix floccifera Charles M. Belshaw 1937-4-1 2854 Colusa Vicinity of Cook's Spring Inner North Coast Range, Devil's Ridge Comment
  UCR261603  Malacothrix floccifera Ann Howald 2003-3-26 2295 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  CHSC84435  Malvella leprosa Lowell Ahart 2003-8-15 10507 Colusa Road (disked) that bordered rice field, on the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  UCR205148  Malvella leprosa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14254 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 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
  UC871130  Malvella leprosa A. A. Heller 1916-6-9 12393 Colusa along state hwy. near Colusa Comment
  SEINET11990999  Marah oregana R. A. DeMartile 1983-1 106 Colusa Goat Mountain Rd 914 Comment
  UC102130  Marah watsonii T. S. Brandegee April 1889 Colusa Epperson's Comment
  UCD66701  Marah watsonii Craig D. Thomsen 2001-4-12 2432 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
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CAS-BOT-BC348045  Matricaria discoidea Roxana S. Ferris 1917-4-19 693 Colusa Sycamore Slough Comment
  UCD63031  Medicago minima Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  UCD163222  Medicago polymorpha Craig D. Thomsen 2000-3-31 2081 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
  SEINET3260185 Image available Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley; along CA-20, 0.2 mile east of the Sutter County line. 9 Comment
  UCR205147  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  CHSC112266  Melica californica Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18639 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC79416  Melica californica B. Castro; L. P. Janeway 2000-4-10 1066 Colusa Vcinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek. 121 Comment
  CHSC79629  Melica californica B. Castro; L. P. Janeway 2000-5-4 1132 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 268 Comment
  JEPS120981  Melica californica Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18639 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
  UCD87699  Melica californica Beecher Crampton 1958-5-19 4817 Colusa West of Lodoga. Comment
  UCR212347  Melica californica Craig D. Thomsen 2000-4-12 2162 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  CHSC111689  Melica californica David Isle; Doug Johnson 1988-5-11 2090 Colusa Mendocino Natl. Forest--North Coast Ranges Little Stony Creeik Watershed. N edge Little Stony Road (Goat Mtn Rd) 6.9 miles W of jct. Lodoga-Stonyford Rd (Co Rd 306). (Gray Pine Cmpgd=3.9 mi W of Co Rd 306 jct., 3 mi W=just E of Trout Ck Bridge over dL Stony Ck). 512 Comment
  CHSC100245  Melica harfordii D. Isle 1988-4-13 1508 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  CHSC100265  Melica harfordii D. Isle 1988-4-13 1510 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  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
  CHSC112269  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD82587  Melica torreyana Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD82136  Melilotus indicus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5669 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
  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
  JEPS108913  Mentha canadensis Lowell Ahart 2006-8-9 13090 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 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
  JEPS104403  Mentha spicata Lowell Ahart 2003-10-23 10666 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  RSA724894  Mentha spicata var. spicata L. Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS80116  Mentzelia dispersa L. R. Heckard with J. Hickman 1980-7-1 5274 Colusa Flat at summit of East Peak. Snow Mt.; Colusa-Lake County Boundary 2148 Comment
  UCD163656  Mentzelia laevicaulis Craig Thomsen 1998-6-10 1954 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  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
  POM174563  Micropus californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit on grade. Williams- Stonyford Road Comment
  UCD162998  Micropus californicus Craig D. Thomsen 2000-4-28 2183 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCR261673  Micropus californicus Ann Howald 2003-3-26 2292 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  SEINET5710220  Micropus californicus Patricia Warne 1967-1 56 Colusa South end of Bear Valley by Bear Creek.; Bear Valley 390 Comment
  CAS-BOT-BC348362  Micropus californicus var. californicus Roxana S. Ferris 1917-4-14 573 Colusa Foothills 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC82608  Micropus californicus var. californicus Tara Morgan 2002-4-1 13 Colusa On the side of Bear Valley Rd. located northeast of Bear Creek south of Bear Valley. 350 Comment
  HSC48198  Micropus californicus var. californicus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3958 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS87665  Micropus californicus var. californicus Vernon H. Oswald and Lowell Ahart 1994-4-6 6067 B Colusa s. Stonyford (Goat Mt. Rd. at Sullivan Creek, 1.2 mi. s.w. of Digger Pine Flat); Sullivan Creek 469 Comment
  UC1049551  Micropus californicus var. californicus Rimo Bacigalupi 1950-4-16 3104 Colusa vicinity Colusa-Glenn County line (ridge above Red Bridge Camp and the confluence of the North amd Middle Forks of Stony Creek); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  HSC65998  Micropus californicus var. californicus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 44 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  UC92165  Microseris acuminata Katharine Brandegee April 1889 Colusa Leesville Comment
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Aug 28 2012
  CHSC30421  Microseris douglasii J. D. Jokerst 1980-4-12 573 Colusa S of Hwy 20, 0.3 mi E of its jct with Hwy 16. Comment
  HSC48163  Microseris douglasii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3927 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 Comment
  JEPS124223  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  JEPS94219  Microseris douglasii subsp. douglasii Vernon Oswald and Lowell Ahart 1998-5-7 8999 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  UCD57294  Microseris douglasii subsp. douglasii Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3665 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD66860  Microseris douglasii subsp. douglasii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5063 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, upslope of stock pond. 615 Comment
  CHSC81250  Microseris sylvatica L. P. Janeway; B. Castro 2001-4-26 7028 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 286 Comment
  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
  CHSC108158  Mimetanthe pilosa David Isle; Rhonda Isle 2010-7-21 1915 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. West shoreline of East Park Reservoir on bank just north of spillway; Within 2 to 4 ft of water line. 365 Comment
  CHSC94497  Mimetanthe pilosa Lowell Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SBBG119885  Mimetanthe pilosa L. Ahart 2006-8-9 13113 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 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
  RSA46870  Mimulus aurantiacus var. aurantiacus Doris K. Kildale 1927-04 3244 Colusa [Unspecified] Comment
  UCD82625  Mimulus bolanderi Craig Thomsen; G. Harrington 2009-5-12 2895 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. About 200 yds.south off spur road, south-facing hillslope above ravine and spring area. 813 Comment
  POM21052  Mimulus cardinalis Roxana Stinchfield 1916-7-9 417 Colusa Philip's Ranch, near Sycamore. Comment
  JEPS13747  Mimulus douglasii Frank W. Gould 1939-4-7 628 Colusa just n County Line (on road from Knoxville to Rumsey) 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
  JEPS121117  Mimulus guttatus Lowell Ahart 2013-5-1 18688 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  SEINET3450718  Mimulus guttatus Unknown 2003-7-14 10383 Colusa Williams, Williams, about 21 road miles southwest, open field on the south side of highway 20, about 2 miles southwest of the intersection of highway 20 and Bear Valley Road 520 Comment
  UCD82512  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2870 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UC1049541  Mimulus kelloggii Rimo Bacigalupi 1950-4-16 3105 Colusa vicinity Colusa-Glenn County line (ridge above Red Bridge Camp and the confluence of the North amd Middle Forks of Stony Creek); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  JEPS86637  Mimulus microphyllus L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6685 Colusa along trail from Frog Pond to East Peak (sw flank of mtn.); Snow Mtn. 1900 Comment
  UC725827  Mimulus microphyllus A. A. Heller 1942-5-29 16482 Colusa 1/2 mi w Highway #16 (along State Highway #20) Comment
  HSC96797  Mimulus nudatus L. Ahart 2006-6-11 12663 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  POM21051  Mimulus pilosus Roxana Stinchfield 1916-7-9 423 Colusa Philip's Ranch, near Sycamore. Comment
  RSA718048  Mimulus pilosus L. Ahart 2006-8-9 13105 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of stonyford. 422 Comment
  UCD164031  Minuartia douglasii Indya Messier 2016-4-9 5 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. South of the corral at junction of 16 and 20, at the top of hill. 504 Comment
  UCD57104  Minuartia douglasii Gordon Harrington; Diana Hickson 2007-4-7 0025 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, ca .5 mi. W of Roadkill Cafe, N. of Thompson Creek. 439 Comment
  UCD82737  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-14 2918 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  CHSC92630  Minuartia nuttallii var. gregaria D. Isle 1999-7-14 1287 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Approx. 1/3 mile below jct. 16N18/16N03 (1/4 mi. below Lake/Colusa Co. Line in Colusa Co. GPS: 10S 0522970 E 4347039 N; Spr 25' South. 1688 Comment
  UC903048  Mirabilis greenei Ethel Crum 1932-5-8 1454 Colusa Stonyford North Coast Ranges (southern extension of ranges) 426 Comment
  JEPS73483  Monardella odoratissima subsp. glauca L. R. Heckard 1972-7-9 3094 Colusa On southeast slope East Peak; Snow Mt. 2072 Comment
  CAS-BOT-BC220676  Monardella villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  UCD70237  Monardella villosa 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
  SEINET10582138  Monardella villosa A. Graff 1993-7-25 Graff 367 Colusa Bear Valley Rd., 2.2 miles north of Rte. 20, on right road cut. Locally infrequent on sandstone cliff, beneath Pinus coulteri, Quercus agrifolia, Arctostaphylos, sp. Past bloom. Comment
  HSC96822  Monardella villosa subsp. villosa L. Ahart 2006-6-11 12672 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  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
  CAS-BOT-BC349576  Monolopia major James Jokerst 1985-4-5 2208 Colusa Near Coyote Peak 456 Comment
  SEINET8729067 Image available Montia spathulata Helen K. Sharsmith 1953-1 4281 Colusa Near Trough Springs on Trough Springs Ridge; Mendocino National Forest. 975 Comment
  CHSC89832  Muhlenbergia filiformis B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1213 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
  CHSC89830  Muilla maritima B. Castro; S. Innecken 2001-3-20 1216 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Reservoir, and the Glenn-Colusa canal. 39 Comment
  CAS-BOT-BC514196  Muilla maritima Roxana S. Ferris 1917-4-12 501 Colusa 4 miles east of Williams Comment
  CAS-BOT-BC83269  Myosurus minimus Roxana S. Ferris 1917-4-10 510 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83273  Myosurus minimus Roxana S. Ferris 1918-4-10 1443 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83274  Myosurus minimus Herbert L. Mason 1953-4-5 14508 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83276  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83278  Myosurus minimus A. A. Heller 1921-4-10 13545 Colusa Near Colusa. Comment
  POM312444  Myosurus minimus var. filiformis H. L. Mason 1953-4-5 1459 Colusa 3 miles east of Maxwell Comment
  CHSC28129  Myosurus sessilis K. R. Stern 1979-5-5 Colusa Ca. 0.25 mi w of intersection of Hwy 20 and Int. Hwy 5. Vernal pool on n side of road, ca. 0.5 mi nw of Williams. 152 Comment
  UC1114813  Myosurus sessilis Donald E. Stone 1956-6 1- 8 -1 Colusa 3 mi e of the city of Maxwell (on the Maxwell Road); Maxwell Road Comment
  UC1738076  Myosurus sessilis H. L. Mason 1957-4-13 14510 B-7 Colusa 3 mi E of Maxwell (on Maxwell Rd.) Comment
  CHSC48457  Myriophyllum hippuroides Vernon Oswald 1984-7-20 1621 Colusa Letts Lake in Mendocino National Forest. 1402 Comment
  UCD67084  Najas gracillima Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5106 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  UC1100003  Najas guadalupensis Malcolm A. Nobs, S. Galen Smith 1949-7-18 1007 Colusa 2.5 mi w of Williams Comment
  CAS-BOT-BC259753  Nassella cernua Roxana S. Ferris 1926-4-23 6399 Colusa Near Mountain House on Williams - Stonyford Road Comment
  CAS-BOT-BC259754  Nassella cernua Roxana S. Ferris 1926-4-23 6424 Colusa Summit of grade Willliams - Stonyford Road Comment
  CHSC85969  Nassella cernua Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  UCD57857  Nassella cernua Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 44 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  UCD87419  Nassella cernua Beecher Crampton 1958-5-19 4790 Colusa 10.7 miles southeast of Leesville. Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 Comment
  UCD87672  Nassella pulchra D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCSB6643  Navarretia G. Keator 1958-6-17 S.N. Colusa JUST W OF BARTLETT SPRINGS Comment
  CHSC86970  Navarretia heterandra B. Castro 2003-5-14 1431 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. At lower end of SE-trending ridge, on west edge of Sacramento Valley. 140 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
  UC908635  Navarretia jepsonii Herbert L. Mason 1946-5-31 12810 a Colusa near summit of Leesville Grade (drainage of n fork of Cache Creek); Cache Creek 548 Comment
  UCD61473  Navarretia jepsonii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3919 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCD66870  Navarretia jepsonii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5073 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. Just south of junction with trail that heads east to the headwaters of Thompson Creek. 634 Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  UCD72392  Navarretia mellita Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5118 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UCR225393  Navarretia nigelliformis Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5082 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa counties. South of junction with trail that heads down to the headwaters of Thompson Creek 429 Comment
  CHSC79545  Navarretia nigelliformis subsp. nigelliformis B. Castro; L. P. Janeway 2000-5-1 1103 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  JEPS95775  Navarretia nigelliformis subsp. nigelliformis J. Greenhouse with J. C. Game 1999-5-30 Colusa on W side of Bear Valley Rd. about 6 1/2 mi from CA Rte. 20 Bear Valley 390 Comment
  CHSC85966  Navarretia pubescens Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  UCD81730  Nemacladus capillaris Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5732 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
  CHSC79485  Nemacladus montanus B. Castro; L. P. Janeway 2000-5-4 1138 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC77935  Nemophila heterophylla Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  UC598446  Nemophila heterophylla Milo S. Baker April, 1938 Colusa Williams Highway near Lake County Line; near Lake County Line Comment
  UC606895  Nemophila heterophylla L. Constance 1938-4-22 2146 Colusa Lower Lake-Williams Rd 4 mi e Lake-Colusa LIne (on Cache Creek near Wilbur Springs); Inner North Coast Ranges, Cache Creek nr Wilbur Springs 365 Comment
  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
  RSA537462  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  CHSC86958  Nemophila pedunculata Beth Hendrickson; Jenny Marr 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 158 Comment
  UC638658  Nemophila pedunculata Ethel Crum 1938-5-8 2025 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UCD163210  Nemophila pedunculata Craig D. Thomsen 2000-3-31 2103 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC43374  Nicotiana glauca Lowell Ahart 1976-2-14 1006 Colusa Along a small stream, about 2 miles west of Sites. 182 Comment
  JEPS87759  Nicotiana glauca Vernon H. Oswald and Lowell Ahart 1994-3-23 6024 Colusa 1.8 mi w Stonyford-Lodoga Rd. (Goat Mtn Rd, s of Stonyford, between the road and Little Stony Creek) 487 Comment
  RSA730238  Nicotiana glauca Richard R. Halse 2007-3-25 7123 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. (WGS84) 100 Comment
  UC194932  Nicotiana quadrivalvis H. M. Hall 1916-6-16 10269 Colusa near Arbuckle (Colusa to Woodland) Comment
  UC34994  Nicotiana quadrivalvis J. Burtt Davy May 1898 4304 Colusa near Princetown Comment
  UCD126711  Nicotiana quadrivalvis K. Esau; D. Hartmann 1941-7-17 s.n. Colusa between Williams and Clear Lake. Comment
  JEPS127817  Orobanche bulbosa Susan Fawcett 2014-5-13 226 Colusa Walker Ridge, near border of Lake and Colusa Counties. Comment
  CAS-BOT-BC502598  Orobanche californica subsp. jepsonii Roxana Stinchfield 1916-7-11 451 Colusa Colusa--Williams Road at trough Comment
  UCD84573  Orobanche fasciculata Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6098 Colusa Walker Ridge on border of Lake and Colusa counties. Just E of Barrel springs area along Walker Ridge Road. 721 Comment
  RSA0076585  Orobanche fasciculata Frank W. Gould 1938-4-22 283 Colusa At head of Capay Valley, west of Arbuckle. Comment
  CAS-BOT-BC7016  Orobanche grayana var. jepsonii Harley Pierce Chandler 1905-10-1 s.n. Colusa Princeton Comment
  CAS-BOT-BC502948  Orobanche vallicola Roxana Stinchfield 1916-7-12 475 Colusa Sycamore Slough Comment
  POM286327  Orthocarpus erianthus Lyman D. Benson 1935-3-27 6339 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  POM231093  Orthocarpus lithospermoides var. bicolor Jens Clausen 1935-5-20 1018 Colusa Ca. 27 mi W of Williams after having passed the Wilbur Springs road. Along Bear Creek. Comment
  UCD88428  Oryza rufipogon P. B. Kennedy 30-31 May 1922 s.n. Colusa Cortina. Comment
  UCD110512  Packera clevelandii Daniel Slakey; CNPS volunteers 2011-6-12 6 Colusa Walker Ridge. Wet meadow area on E side of Walker Ridge Rd. About 18 km N of Hwy.20 by road. 876 Comment
  UCD64040  Packera clevelandii Craig D. Thomsen 2000-6-23 2425 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  CAS-BOT-BC231236  Packera eurycephala var. eurycephala Roxana Stinchfield Ferris 1926-4-23 6454 Colusa Stonyford. Comment
  UC1299386  Paeonia brownii Freed W. Hoffman 1948-6-27 2493 Colusa 8.6 mi sw Fouts Springs (w Colusa Co.); upper Letts Valley 1310 Comment
  JEPS110410  Panicum capillare Lowell Ahart 2006-8-22 13222 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  CAS-BOT-BC253937  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa Along US Highway 99W, 4 miles S of Maxwell Comment
  UCD88469  Parapholis incurva A. A. Beetle 1942-4-1 3271 Colusa 12 miles north of Williams. Comment
  CAS-BOT-BC413468  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Sycamore Slough. Stinchfield ranch Comment
  CDA11258  Parnassia californica G. F. Hrusa 1994-11-7 11993 Colusa North Coast Biodiversity Arena; Banks of Little Stony Creek, approx. 2.5 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  RSA724980  Paspalum distichum L. Ahart 2006-9-26 13352 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UCD67080  Paspalum distichum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5104 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
  UCR225658A  Paspalum distichum Craig D. Thomsen, Gordon Harrington 2008-7-6 2780 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  UC766200  Pectocarya penicillata R. F. Hoover 1938-4-24 3220 Colusa w Arbuckle; Sand Creek foothills Comment
  CHSC86879  Pectocarya pusilla B. Castro 2003-4-1 1411 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek, on low N-facing cutbank of dirt road which contours along hillside through area of cutover blue oak woodland. 280 Comment
  SEINET13753666  Pedicularis densiflora R. R. Halse 2014-3-25 9035 Colusa Along the Bear Valley Road ca. 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  UCD56679  Pedicularis densiflora Jack Alderson 2007-3-25 15 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. 574 Comment
  HSC62929  Pedicularis densiflora Kenneth Clark 1979-4-14 92 Colusa 1067 Comment
  JEPS80796  Pedicularis semibarbata L. R. Heckard and J. C. Hickman 1981-7-30 5766 Colusa along Trout Creek (se side of Mount Snow); Snow Mountain 1554 Comment
  UCD80837  Pellaea andromedifolia Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5294 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
  JEPS86609  Pellaea brachyptera L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6713 Colusa 0.5 mi. n.e. Summit Springs (s.w. flank of Snow Mt.); Colusa-Lake Co. Line, Snow Mt. 1650 Comment
  SEINET3873302  Pellaea mucronata subsp. mucronata Stephen Plant 1978-4-22 212 Colusa Wilber Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  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
  NY601769  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Above Salt Creek, Lower Lake-Williams road, 11 miles northeast of Lake-Colusa line, Inner North Coast Ranges. 152.4 Comment
  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
  CDA20255  Penstemon heterophyllus var. purdyi G. D. Barbe, Nola Parmer 1982-6-4 3636 B Colusa North Coast Ranges; Goat Mountain Rd, w of Lodoga-Stonyford Rd, Mendocino National Forest. 0 Comment
  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
  UC125238  Penstemon purpusii Katharine Brandegee 1892-8-24 Colusa Snow Mountain near Monument; Snow Mountain near the Monument Comment
  UCD124198  Penstemon purpusii A. M. Shapiro 1994-6-12 s.n. Colusa at road junction just below summit of Goat Mountain. Comment
  CHSC42649  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near Letts Lake and Lily Pond. 1188 Comment
  CHSC116397  Perideridia kelloggii David Isle; Frank Pendell 2014-6-16 2135 Colusa North Coast Range. About 2 miles west of Stonyford on the Pendell Ranch. Southeast of the home of Frank and Sheri Pendell about 1/4 mile and northwest of the Stonyford Cemetery about 200 yards (GPS is Pendell home S of Fouts Springs Rd. ~50 yds. 10S -0536687E, 4357699N. Comment
  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
  CHSC108152  Phacelia distans David Isle 2008-4-9 1934 Colusa Sacramento River Watershed. Reese Place Duck Club (4498 2 Mile Rd); ~ 4 mi. NE of Maxwell. 30 Comment
  HSC35373  Phacelia distans Robert M. Specht 1975-5-4 169 Colusa 1/2 mi. NE of Fouts Springs along Stoney Creek 488 Comment
  UCD64438  Phacelia divaricata Craig D. Thomsen 2000-4-4 2071 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212377  Phacelia divaricata Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek 358 Comment
  UC901824  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
  JEPS80874  Phacelia heterophylla subsp. virgata L. R. Heckard and J. C. Hickman 1980-7-3 5373 A Colusa near Summit Springs (sw slope); Snow Mt. 1554 Comment
  CHSC60747  Phacelia imbricata subsp. imbricata Vernon H. Oswald; Lowell Ahart 1993-5-27 5430 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). 481 Comment
  UC1228287  Phacelia imbricata subsp. imbricata L. R. Heckard and C. R. Bell 1951-6-13 175 Colusa at base of cliff just n Stonyford 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
  UCD164156  Phacelia tanacetifolia Craig Thomsen 2008-4-7 2726 Colusa Bear Creek Canyon, along Bear Valley Rd. about 0.75 mile north of junction with Hwy 20. Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD88035  Phalaris aquatica Beecher Crampton 1963-8-5 6869 Colusa 1/4 mile E of Cortena. Comment
  CAS-BOT-BC259027  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 Colusa 4 miles east of Williams Comment
  POM198501  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC265957  Phalaris minor Roxana S. Ferris 1926-4-22 6287 Colusa 3 miles west of Colusa Comment
  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
  JEPS71082  Phlox gracilis W. L. Jepson 1932-5-8 16276 Colusa Lodoga, w Colusa Co Lodoga 457 Comment
  CDA11389  Phoradendron densum G. F. Hrusa, K. van Katwyk 1995-4-22 12109 Colusa Inner North Coast Ranges; N end of Walker Ridge, approx. 1 m. S of intersection with Bartlett Springs Road. Comment
  RSA0115434  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian. 20 Comment
  JEPS106503  Phragmites australis L. P. Janeway, B. Castro 2001-6-3 7098 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain 884 Comment
  UC1124395  Phyla caespitosa H. S. Yates 1936-8-14 6134 Colusa 3 mi S of Colusa 15 Comment
  UC727675  Phyla lanceolata Milo S. Baker 1946-9-3 11622 Colusa near locked gate Colusa Gun Club (Butte Sink); Butte Sink Comment
  UC1004696  Physalis lancifolia J. M. Tucker 1954-8-23 2746 Colusa 7 mi e Arbuckle (just n of rd e from Arbuckle) Comment
  UC985936  Physalis lancifolia Herbert L. Mason and Verne Grant 1946-8-7 12979 Colusa 8 mi n Colusa; Butte Sink Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  CDA580  Pinus sabiniana G. D. Barbe, T. C. Fuller 1986-3-6 4259 Colusa Steep bank below road grade, Leesville Grade, W of Williams. 0 Comment
  UCD57447  Pinus sabiniana Gina Darin; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  CHSC94297  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CAS-BOT-BC227986  Plagiobothrys Doris K. Kildale 1928-5-8 5014 Colusa 3 miles S of Arbuckle Comment
  POM163443  Plagiobothrys Roxana S. Ferris 1926-4-21 6295 Colusa 3 mi W of Colusa.. Comment
  CHSC29710  Plagiobothrys bracteatus K. R. Stern 1980-6-1 6636 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  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
  RSA730246  Plagiobothrys canescens R. R. Halse 2007-3-22 7106 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  CHSC79099  Plagiobothrys fulvus B. Castro 2000-3-17 1040 Colusa Vicinity of Sites, Antelope Valley, and Huffmaster Rd. 182 Comment
  JEPS68046  Plagiobothrys fulvus W. L. Jepson 1932-5-7 16258 Colusa valley above Venado 304 Comment
  UCD58098  Plagiobothrys fulvus Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3475 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  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
  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
  HSC47742  Plagiobothrys nothofulvus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3947 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD56901  Plagiobothrys nothofulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3504 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  HSC99265  Plagiobothrys nothofulvus D. R. Junell 1965-4-18 20 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  CHSC89828  Plagiobothrys scriptus B. Castro; L. Janeway 2001-5-2 1243 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
  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
  RSA10707  Plagiobothrys stipitatus C. B. Wolf 1928-5-8 2124 Colusa Sacramento Valley. 3 mi. S of Arbuckle 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
  CHSC107154  Plagiobothrys stipitatus var. micranthus L. P. Janeway; B. Castro 2011-5-19 10283 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Occasional groups of this in some parts of the marsh (no standing water now, but still mucky). 49 Comment
  JEPS123890  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-28 20115 Colusa About 5 1/2 miles east of Maxwell. Comment
  UC79383  Plagiobothrys stipitatus var. micranthus Katharine Brandegee Apr 1889 Colusa Colusa Junction 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
  UCD66938  Plagiobothrys stipitatus var. micranthus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5087 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
  CHSC29720  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-1 6617 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC55678  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-3 6623 Colusa North central portion of Delevan National Wildlife Refuge. 45 Comment
  UCD63009  Plagiobothrys stipitatus var. stipitatus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  UC1584634  Plantago coronopus Dean W. Taylor 1988-3-24 9460 Colusa ca 0.5 mi n Ware Road (on Ohm Road); Sacramento Valley, Colusa National Wildlife Refuge 24 Comment
  UCD58124  Plantago coronopus Ellen Dean; PLB 102 Class 2007-4-29 3720 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
  CAS-BOT-BC366913  Plantago erecta Richard R. Halse 2013-3-27 8761 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
  CDA41952  Plantago erecta G. F. Hrusa 1990-4-8 7670 Colusa North Coast Biodiversity Arena; Bartlett Springs road immediately W of Bear Valley to Walker Ridge. Comment
  CHSC71119  Plantago erecta Jan Monelo 1989-4-1 15 Colusa Ca 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  JEPS120973  Plantago erecta Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18632 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
  UCD56669  Plantago erecta Jack Alderson 2007-3-25 5 Colusa BLM Payne Ranch. Destanella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 553 Comment
  UCD64271  Plantago erecta Craig D. Thomsen 2000-3-31 2067 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
  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
  UCD82366  Plantago erecta Robin McMaster 1973-4-15 336 Colusa Bear Valley. Comment
  RSA388847  Plantago erecta subsp. erecta Susan Dakuzaku 1975-4-20 28 Colusa Bear Valley Road, 9.5 miles north of State Highway 20. 404 Comment
  JEPS110098  Plantago lanceolata Lowell Ahart 2006-8-9 13153 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  POM142384  Platanus racemosa Roxana Stinchfield 1916-7-8 395 Colusa Stinchfield Ranch, along Sycamore Slough Comment
  SD8259  Platystemon californicus Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC118440  Platystemon californicus T. S. Brandegee April 1889 Colusa Stites Comment
  CAS-BOT-BC91597  Platystemon californicus K. Brandegee 1889-4-1 s.n. Colusa Unspecified. Comment
  CDA34082  Platystemon californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  HSC72768  Platystemon californicus J. Krajanowski 1981-4-4 3 Colusa .3 mi. W of junction of Hwy. 20 and Hwy. 16, S side of Bear Creek, 18 mi. SW of Williams 322 Comment
  UCSB63724  Platystemon californicus Devanna, Martin 1987-4-4 Colusa Ca. 0.3 mi w of jct Hwys 20 and 16; S side of Bear Creek; ca. 18 mi sw of Williams; Wilbur Springs Quadrangle; S central border of Sect. 36. T14N, R5W 321 Comment
  CHSC115381  Platystemon californicus var. californicus Lowell Ahart 2015-4-1 20002 Colusa Along Bear Valley Road, in Bear Valley, about 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Inner North Coast Range. 395 Comment
  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
  POM158154  Platystemon californicus var. californicus Lyman Benson 1935-3-27 6335 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  POM19059  Platystemon californicus var. californicus Lyman Benson 1935-3-27 6334 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CDA11417  Plectritis ciliosa G. F. Hrusa, K. van Katwyk 1995-4-22 12138 Colusa Inner North Coast Ranges; On S side of Leesville Rd. approx. 3 m. N of Hwy 20. Comment
  CDA34081  Plectritis ciliosa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County 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
  RSA31153  Poa annua A. A. Heller, H. E. Brown 1902-5-2 5439 Colusa Princeton. Comment
  RSA756857  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-11 14360 Colusa along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) Comment
  UCD163710  Poa annua Craig Thomsen 1999-5-10 2022 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  CHSC100244  Poa bulbosa D. Isle 1988-4-13 1509 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  JEPS124236  Poa bulbosa Lowell Ahart 2015-4-1 19991 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  SEINET10822495  Poa bulbosa K. E. Warwick 1978-4-8 Warwick 21 Colusa Salt Creek Canyon, n side of Salt Creek, Hwy 20, 11 mi WSW of Williams. Ca. 100 ft. S of Hwy 20, in open area. Wilbur Springs Quadrangle, 15'. E central border of Sect. 32. T15N, R4W. Comment
  UCD82444  Poa howellii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5661 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
  UCD82624  Poa pratensis Craig Thomsen; G. Harrington 2009-5-12 2894 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  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
  UCD57110  Poa secunda Gordon Harrington; Diana Hickson 2007-4-7 0020 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  CAS-BOT-BC236333  Poa secunda subsp. secunda Roxana S. Ferris 1917-4-14 575 Colusa Arbuckle - Rumsey Road. Foothills W of Arbuckle Comment
  CHSC33326  Poa secunda subsp. secunda P. Reynolds 1980-4-12 15 Colusa Ca. 0.3 mi. w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 mi. sw of Williams. 321 Comment
  CHSC77408  Poa secunda subsp. secunda Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  JEPS80373  Poa secunda subsp. secunda L. R. Heckard and J. Hickman 1981-6-22 5606 Colusa s side of e ridge of E Peak Snow Mt 1950 Comment
  JEPS80396  Poa secunda subsp. secunda L. R. Heckard and J. Hickman 1981-6-22 5629 Colusa below (s of) Dark Hollow trail Snow Mt 1981 Comment
  SD262256  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern California Foothills: north side of Maxwell Road, c. 2 miles west of Sites and 5.8 miles east of summit of Maxwell Grade. 128 Comment
  CAS-BOT-BC110510  Polygonum Roxana Stinchfield 1916-7-11 468 Colusa Davis Tule near Sycamore Slough. Comment
  UC1192334  Polygonum amphibium var. emersum Herbert L. Mason and Verne Grant 1946-8-6 12970 Colusa pond 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  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
  JEPS80203  Polygonum douglasii subsp. douglasii L. R. Heckard and J. Hickman 1980-7-3 5358 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  JEPS75752  Polygonum parryi L. R. Heckard and R. Bacigalupi 1976-9-6 4433 Colusa just e Fouts Camp; Snow Mt. 1859 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
  CHSC107308  Polypogon australis L. P. Janeway; B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  JEPS118671  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of SacramentoValley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Comment
  UC1100402  Polypogon interruptus Malcolm A. Nobs and S. Galen Smith 1949-9-9 1875 Colusa 3 mi w Williams Comment
  CHSC94413  Polypogon maritimus Lowell Ahart 2006-8-9 13171 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75436  Polypogon monspeliensis W. L. Jepson 1934-5-3 16602 Colusa n Colusa (Stegeman Sta.) Comment
  UCR196277  Polypogon monspeliensis Ellen Dean, Gordon Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3885 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. 0.25 mi northwest of parking lot in hills to the west of Bear Creek 357 Comment
  CHSC116671  Polystichum munitum Lowell Ahart; John Dittes, Joseephine Guardino 2016-2-14 20720 Colusa On the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  RSA724221  Populus fremontii Richard R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  UCD67085  Potamogeton diversifolius Ellen Dean; 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. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  UC1099840  Potamogeton pectinatus Herbert L. Mason 1946-8-6 12957 Colusa 4 mi s of Colusa (on Colusa-Marysville Highway, w side of Sacramento River); Sacramento River Comment
  RSA0014801  Proboscidea louisianica Richard Snow 1958-8-3 672 Colusa Near State Highway 20, on the road to Leesville. 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
  JEPS80050  Prunus emarginata L. R. Heckard with J. Hickman 1979-6-15 5050 Colusa Snow Mountain, East trail from Frog Pond to cirque of east and w peaks Snow Mountain 1981 Comment
  UCD67100  Prunus emarginata Ellen Dean; Davis Botanical Society 2008-5-31 5027 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCD141584  Prunus subcordata Ellen Dean 2013-4-3 7596 Colusa BLM Bear Creek Ranch (previously Payne Ranch), at intersection of HWY 16 and HWY 20. Main part of ranch near Roadkill Cafe, along South side of Thompson Creek, Southeast of Roadkill Cafe. 384 Comment
  CAS-BOT-BC151201  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga 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
  UCD84572  Prunus virginiana var. demissa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6097 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Goad, between Cold spring and Buck Flat. 971 Comment
  UCD84571  Pseudognaphalium californicum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6096 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Goad, between Cold spring and Buck Flat. 971 Comment
  CHSC79457  Pseudognaphalium luteoalbum B. Castro; L. P. Janeway 2000-5-4 1136 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  JEPS120792  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CAS-BOT-BC357551  Pseudognaphalium stramineum Roxana Stinchfield 1916-7-8 372 Colusa Sycamore Slough-Stinchfield Ranch 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
  JEPS80806  Pseudotsuga menziesii var. menziesii L. R. Heckard and J. Hickman 1981-7-30 5777 Colusa along upper (e side) Miller Camp Meadow; Snow Mt. 1874 Comment
  UCD133714  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa 3 miles east of Maxwell. Comment
  CHSC107119  Psilocarphus brevissimus var. brevissimus L. P. Janeway; B. Castro 2011-4-27 10241 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.3 km northeast of Tehama-Colusa Canal. On bare ground in re-vegetating old vehicle tracks through north edge of the marsh. 49 Comment
  CHSC115395  Psilocarphus oregonus Lowell Ahart 2015-4-10 20008 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  CHSC60658  Psilocarphus oregonus Vernon H. Oswald 1993-4-14 5268 Colusa Tour Route, Colusa National Wildlife Refuge, SW of Colusa. On top of a levee road branching off of the S leg of the tour route. 18 Comment
  UC1601294  Psilocarphus oregonus T. S. Brandegee Colusa Williams Comment
  CAS-BOT-BC361875  Psilocarphus tenellus Roxana S. Ferris 1917-4-19 692 Colusa Sycamore Slough Comment
  CHSC115394  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  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
  UCD58125  Psilocarphus tenellus Ellen Dean; PLB 102 Class 2007-4-29 3721 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Near 'Roadkill Cafe. 414 Comment
  UCR198137  Psilocarphus tenellus Ellen Dean, PLB 102 Class 2007-4-29 3721 Colusa BLM Payne Ranch, west of Hwy 16, c. 2 road mi south of junction of Hwy 20 and Hwy 16 through Craig Canyon, near 'Roadkill Cafe' 415 Comment
  CHSC80346  Psilocarphus tenellus var. tenellus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 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
  JEPS80462  Pteridium aquilinum var. pubescens Alice Q. Howard 1972-7-10 3 Colusa trail from Fouts Camp to Box Springs (n side of ridge separating Trout and Paradise Creeks); Snow Mt 1676 Comment
  HSC45682  Pterostegia drymarioides Sheila Logan 1978-4-22 63 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1562605  Pyrola picta Barbara Ertter 1989-7-1 8593 Colusa 12 air wsw of Stonyford (road to Goat Mountain Lookout 2.2 mi s of Rte M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); South Fork Stony Creek 1500 Comment
  JEPS80830  Quercus L. R. Heckard, and J. Hickman 1981-7-31 5802 Colusa s and above Dark Hollow Creek (e side of Snow Mt.); Snow Mt. 1767 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
  UCD82634  Quercus berberidifolia Jack Alderson 2009-9-19 30 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Just S of mouth of Brophy Canyon. 341 Comment
  UCD83754  Quercus chrysolepis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5951 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  CDA15555  Quercus chrysolepis var. nana G. F. Hrusa 1998-11-7 14906 Colusa North Coast Ranges; above Fouts Springs. Trough Springs Rd. mi. 2.7. Comment
  CAS-BOT-BC86602  Quercus douglasii Roxana Stinchfield 1916-6-18 302 Colusa near College City Comment
  SBBG25340  Quercus douglasii S. C. Schank 1960-4-10 40 Colusa several hundred feet from river, Bear Valley Comment
  UCD45958  Quercus durata 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
  UCR52364  Quercus durata L. Blackford, S. Branch, D. Malm 1988-4-16 62 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  CHSC105193  Quercus durata var. durata B. Castro; L. P. Janeway 1999-7-5 1016 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.6 mi NE of Pacific Point. 1051 Comment
  HSC71309  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4617 Colusa Along Stony Creek below Digger Pine Campground Comment
  JEPS82547  Quercus garryana var. breweri L. R. Heckard 1983-7-27 6112 Colusa s flank Snow Mt. (slopes around Summit Springs) Comment
  CDA16104  Quercus garryana var. garryana G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15249 Colusa North Coast Ranges; Goat Mtn. 1706 Comment
  UC1051744  Quercus kelloggii Helen K. Sharsmith 1953-6-20 4300 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  UCD46857  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa Butte Sink, along Butte Creek, ca. 3 miles northeast of Colusa. Comment
  UCD57625  Quercus lobata Michele Lanctot; 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. North side of Thompson Creek. 356 Comment
  UCR201775  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  RSA798652  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  SBBG111416  Quercus palmeri R. Raiche 1990-12-2 Colusa across Sulphur Crk from Wilbur Springs Comment
  SD225831  Quercus palmeri Roger Raiche 1990-12-2 Colusa Across Suphur Creek from Wilbur Springs; Comment
  UCD14528  Quercus palmeri Roger Raiche 1990-12-2 E Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  CAS-BOT-BC104659  Quercus wislizeni L. Blackford; S. Branch; D. Malm 1988-4-16 63 Colusa 13.8 miles of Hwy. 20 on Walker Ridge Road 975 Comment
  CDA15554  Quercus wislizeni var. frutescens G. F. Hrusa 1998-11-7 14905 Colusa North Coast Ranges; Above Fouts Springs on Trough Springs Rd. mi. 2.7. Comment
  CHSC33068  Rafinesquia californica Thomas Nelson; Jane Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  HSC48162  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 Comment
  JEPS121102  Rafinesquia californica Lowell Ahart 2013-5-1 18670 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  UCD82383  Rafinesquia californica Craig Thomsen; G. Harrington 2009-5-12 2824 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  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
  CHSC118888  Ranunculus arvensis David Isle; Ffrank Pendell 2017-5-17 2172 Colusa Foothills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 toFrank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  SEINET11587858  Ranunculus canus Unknown 2009-3-11 14373 Colusa Williams 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
  CHSC79555  Ranunculus hebecarpus B. Castro; L. P. Janeway 2000-5-4 1127 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  JEPS87656  Ranunculus hebecarpus Vernon H. Oswald and Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  UCD169733  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  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
  UCD56912  Ranunculus occidentalis Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3515 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD82511  Ranunculus occidentalis Craig Thomsen; G. Harrington 2009-5-12 2869 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CDA32825  Ranunculus occidentalis var. eisenii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 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
  RSA0115435  Raphanus sativus George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22509 Colusa Sacramento Valley: along CA-20 at Sycamore Cutoff, 1.3 miles west of the Sacramento River crossing. 20 Comment
  UCR201547  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14265 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 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
  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
  UCR228656  Rhamnus tomentella subsp. crassifolia Ellen Dean, Davis Botanical Society 2008-5-31 4996 Colusa West of Hwy I-5 at Maxwell, along Goat Mountain Road,following Little Stoney Creek, Little Stoney Creek Canyon 414 Comment
  RSA275357  Rhamnus tomentella subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley road , 2.5 miles from jct with State Route 20, Oak Woodland 366 Comment
  CAS-BOT-BC170522  Rhus aromatica Roxana S. Ferris 1926-4-23 6590 Colusa Near Stonyford. 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
  RSA403713  Rhus trilobata var. quinata Michelle Stevens 1979-4-14 30 Colusa Bear Valley Road, 3.9 miles north of State Route 20 412 Comment
  UC1299689  Ribes binominatum Freed W. Hoffman 1948-6-26 2513 Colusa n side Goat Mountain (Colusa Lake county line) 1630 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
  CAS-BOT-BC168901  Ribes malvaceum Eric Peterson; Matt Foruria; Tom Ward 1995-4-2 59 Colusa 4.3 north on Walker Ridge Road from jct with Hwy 20 822 Comment
  HSC44275  Ribes malvaceum Barbara Kelly 362 Colusa 1 mi.. from intersection of Bartlett Springs Rd. and Grapevine Spring Rd. on Walker Ridge Rd. Comment
  UCD97118  Ribes malvaceum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6901 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  HSC94175  Ribes malvaceum var. malvaceum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 4 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  HSC62787  Rigiopappus leptocladus J. M. DiTomaso 1979-4-14 876 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  UCD163332  Rigiopappus leptocladus Craig D. Thomsen 2009-5-3 2801 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD67038  Rigiopappus leptocladus Ellen Dean; Davis Botanical Society 2008-5-31 5018 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 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
  JEPS80215  Rorippa nasturtium-aquaticum L. R. Heckard and J. Hickman 1980-7-3 5371 Colusa Summit Springs sw slope Snow Mt., Summit Springs 1554 Comment
  CHSC88586  Rosa californica L. P. Janeway; B. Castro 2001-6-3 7097 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. 884 Comment
  JEPS106501  Rosa californica L. P. Janeway, B. Castro 2001-6-3 7097 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain 884 Comment
  JEPS80273  Rumex acetosella L. R. Heckard, and J. Hickman 1980-9-16 5456 A Colusa ne slope West Peak (cirque area between peaks Snow Mt.); Snow Mt. 2011 Comment
  UCD61462  Rumex crispus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3908 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  UCD61463  Rumex crispus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3909 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  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
  JEPS113058  Saccharum ravennae Gordon Leppig 2001-9-13 1611 Colusa Rt. 16. Cache Creek bridge #22-19. 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
  CHSC70904  Salix breweri Vernon H. Oswald; Lowell Ahart 1998-4-21 8944 Colusa Stonyford-Lodoga Rd. 3.7 mi south of Stonyford. 384 Comment
  UCD56929  Salix breweri Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3532 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 353 Comment
  UCD57307  Salix breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3678 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  CHSC77371  Salix exigua Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Sites and Sites-Ladoga Road. 109 Comment
  CAS-BOT-BC107838  Salix gooddingii Roxana Stinchfield 1916-7-7 397 Colusa Sycamore slough near Sycamore Comment
  CAS-BOT-BC107840  Salix gooddingii Alice Eastwood 1921-4-11 10235 Colusa Colusa Comment
  CAS-BOT-BC104036  Salix hindsiana Roxana Stinchfield 1916-7-7 396 Colusa Sycamore Slough near Sycamore 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
  JEPS122457  Salix lasiolepis David Isle with David Toren 2003-6-24 2128 Colusa Mendocino National Forest. NE border of Veratrum spring & meadow, 1/4 mi E of Goat Mtn Rd 16N03 junction w/Horse Glade Rd; (with flowing water) Comment
  JEPS95541  Salix lasiolepis Vernon H. Oswald and Lowell Ahart 1994-3-23 6016 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  CHSC112002  Salix lasiolepis David Isle; David Toren 2003-6-24 2128 Colusa NE border of Veratrum spring and mdw, 1/4 mi E of Goat Mtn Rd 16N03 jct w/Horse Glade rd; (with flowing water). 1670 Comment
  JEPS110140  Salix lasiolepis var. lasiolepis Lowell Ahart 2006-8-9 13147 Colusa Gravel bar, north side and 30 yards west of the bridge across Stony Creek, just north of Stonyford 347 Comment
  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
  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
  JEPS110510  Salsola soda Lowell Ahart 2006-9-26 13348 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  CHSC27525  Salvia columbariae Greg C. Halcomb 1978-4-9 10 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC60750  Salvia columbariae Vernon H. Oswald; Lowell Ahart 1993-5-27 5432 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). 481 Comment
  HSC66000  Salvia columbariae C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 51 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  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
  SEINET12318609  Salvia columbariae K. A. Smail 1978-1 s.n. Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams. Wilbur Springs Quadrangle, 15'* 143 Comment
  JEPS85071  Sambucus mexicana L. R. Heckard and J. C. Hickman 1982-7-6 5935 Colusa slope above and e Summit Springs (s side of mt.); Snow Mt. 1584 Comment
  UCD57658  Sambucus nigra subsp. caerulea Hildegarde Durkin; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. North side of Thompson creek. Along trail above Thompson Creek 362 Comment
  UCD83684  Sambucus nigra subsp. caerulea John Rosenthal; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs area. Growing one foot off of road leading into Eaton Springs Meadow. North side of the road. 716 Comment
  SEINET5585731  Sanicula bipinnata Richard R. Halse 2013-1 8741 Colusa Along the Leesville Road ca. 8.3 miles northwest of its junction with State Hwy. 20, west of Williams; or 4.8 miles southeast of the junction with Bear Valley Road. 314 Comment
  UC106104  Sanicula bipinnatifida T. Brandegee March 1889 Colusa Leesville Comment
  UC630430  Sanicula bipinnatifida Annetta Carter 1938-5-7 1375 Colusa 4 mi n of Rumsey (Inner North Coast Range, Comanche Hills); Inner North Coast Range, Comanche Hills 243 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
  UCD57664  Sanicula crassicaulis Erica A. Smith; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, where road crosses Craig Creek. 313 Comment
  UCD82730  Sanicula crassicaulis Craig Thomsen; G. Harrington 2009-5-14 2912 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  CDA15496  Sanicula graveolens G. F. Hrusa, WTD 1998-6-19 14633 Colusa North Coast Ranges; NE side of Goat Mtn. summit. Comment
  UCD163232  Sanicula tuberosa Craig D. Thomsen 2001-4-12 2437 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection (about 1/8 mile east of vista point). 345 Comment
  UCD56685  Sanicula tuberosa Gordon Harrington 2007-3-25 10 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 584 Comment
  UCD82528  Sanicula tuberosa Craig Thomsen; G. Harrington 2009-5-12 2884 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCD163867  Schedonorus arundinaceus Craig D. Thomsen 2001-5-31 2555 Colusa Bear Creek Canyon, south of Bear Valley. About 4 miles north of Hwy 20. Comment
  CHSC110853  Schoenoplectus acutus var. occidentalis David Isle; Rhonda Isle 2013-6-27 2046 Colusa Above (S of) 18N01, ~200 yards NW of jct with OHV Trail 17N12; (~3/4 mi SW of Fouts Springs Loop Rd, E side). 670 Comment
  SEINET9763234 Image available Schoenoplectus glaucus Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  RSA530101B  Schoenoplectus maritimus D. W. Taylor 1989-8-4 10420 Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles north of Ware Road 24 Comment
  UCD72473  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3807 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  UCD63106  Schoenoplectus pungens var. longispicatus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4937 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 344 Comment
  UC1100677  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1946-8-7 12987 Colusa eight mi n Colusa (Butte Sink); , n of Colusa 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
  JEPS75726  Scutellaria californica L. R. Heckard 1974-9-9 3861 Colusa along trail about 1/3 mi e of Foutch Camp (along Trout Creek); Snow Mountain, Trout Creek 1828 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
  JEPS80267  Scutellaria californica L. R. Heckard and J. Hickman 1980-9-16 5450 Colusa e of Snow Mountain, West Peak (first meadow along trail from Frog Pond, Snow Mountain); Snow Mountain 1981 Comment
  UCD81706  Scutellaria californica Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5714 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCR225654  Scutellaria californica Craig D. Thomsen, Gordon Harrington 2008-7-6 2770 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  UCD67055  Scutellaria siphocampyloides Craig D. Thomsen 2008-5-23 2746 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 415 Comment
  CHSC112016  Scutellaria siphocampyloides David Isle; F. Thomas Griggs 1979-5-23 2073 Colusa Mendocino National forest. Off N side Goat Mtn. Rd, about 2 miles W of jct w/ Lodoga-Stonyford Rd. Near old fire pre-attack triangular sign I-7 on metal T-post. 426 Comment
  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
  SEINET7042567  Scutellaria siphocampyloides 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
  SFV10451  Scutellaria tuberosa M. L. Vincent 1968-6-8 779 Colusa Goat Mountain Road, 1 mile from Stanford turnoff. Comment
  UC71637  Scutellaria tuberosa Miss Alice King 1905-1 Colusa College City Comment
  UCD83449  Scutellaria tuberosa Craig Thomsen; G. Harrington 2009-5-14 2897 Colusa Colusa County on Walker Ridge: South of spur road connecting Walker Ridge Rd and Eaton Springs. 710 Comment
  HSC35372  Scutellaria tuberosa Robert M. Specht 1975-5-4 170 Colusa 1/2 mi. NE of Fouts Springs along Stoney Creek 488 Comment
  UCD125753  Scutellaria tuberosa Kim E. Steiner 1978-4-29 195 Colusa on southwest-facing slope, Walker Ridge Rd., 1.5 mi N of State Hwy 20. 777 Comment
  JEPS73459  Senecio aronicoides L. R. Heckard 1972-7-8 3063 Colusa saddle between East and West Peaks; Snow Mt. 1981 Comment
  RSA700356  Senecio clevelandii L. P. Janeway, B. Castro 2001-6-3 7103 Colusa At Buck Flat: East side of Walker Ridge at head of Gaither Canyon; about 1.3 km. south-southeast of Baldy Mountain. 872 Comment
  RSA201801  Senecio eurycephalus J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, 8.6 miles (by Bear Valley Road) northwest of junction with State Highway 20. 396 Comment
  JEPS110106  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC6689  Senecio vulgaris Marilyn Lee 1968-3-30 119 Colusa North side of Hwy. 16 at junction of Hwy. 16 and Hwy. 20. Between Hwy. 16 and Cache Creek. Comment
  UCR206873  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14316 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  JEPS110389  Setaria viridis Lowell Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD121993  Sherardia arvensis V. C. Bryant 1925-10-10 s.n. Colusa Arbuckle. Comment
  JEPS94196  Sidalcea diploscypha Vernon Oswald and Lowell Ahart 1998-5-7 9003 Colusa Bartlett Springs Rd. 2.1 mi. w. of Bear Valley Rd., 0.8 mi. e. of Sawtelle Valley and Grapevine Flat Rds. 524 Comment
  UCD57838  Sidalcea diploscypha Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 40 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Along Thompson Creek, upstream (west of) Road Kill Cafe. On a terrace at the confluence of Thompson Creek and a tributary, approximately 3/4 mile upstream from the breached dam near Road Kill Cafe. 413 Comment
  HSC79083  Sidalcea diploscypha M. A. Strull, C. Houseman, L. Linstedt 1984-4-28 9 Colusa 6 mi. E of Bartlett Springs Rd. on Brimm Rd. 488 Comment
  OBI30253  Sidalcea diploscypha Chris M. Johnson 1970-5-8 A 19 a Colusa At the jctn of hwys 16 and 20 335 Comment
  UC71634  Sidalcea hartwegii Miss Alice King 1905-1 Colusa College City Comment
  UCD82538  Sidalcea hartwegii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5691 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
  JEPS123194  Sidalcea hartwegii David Gowen 2009-5-6 1019 Colusa Burned area about 6.5 miles from Hwy 20 on Walker Ridge Road. Comment
  CHSC79771  Sidalcea keckii L. P. Janeway; B. Castro 2000-5-3 6700 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 396 Comment
Read comments
Mar 15 2011
  RSA477841  Silene californica D. A. Young 1969-5-4 P- 377 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  SEINET11262894  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  SFV11278  Silene laciniata subsp. californica M. L. Vincent 1968-6-6 780 Colusa 1.2 miles west from Stony Ford. 11 mile sign on trip down from Goat Mountain. 375 Comment
  CHSC115383  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 Colusa Burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  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
  JEPS120994  Sisyrinchium bellum Lowell Ahart 2013-4-26 18644 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
  JEPS124213  Sisyrinchium bellum Lowell Ahart 2015-4-10 20012 Colusa About 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Comment
  POM163504  Sisyrinchium bellum Roxana S. Ferris 1926-4-21 6307 Colusa Near Sycamore Comment
  UCD66596  Sisyrinchium bellum Craig D. Thomsen 2000-4-28 2247 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  IRVC29851  Smilacina racemosa Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5038 Colusa Snow Mtn; Summit Spring Trail; between Snow Mtn West summit and Cedar Camp. Southern Northern Inner Coast Ranges 2012 Comment
  SEINET3887835  Smilacina racemosa var. amplexicaulis Barbara Bogert 1970-5-23 16 Colusa Bear Valley Road 2.5 miles north of State Highway 20.; 0 183 Comment
  CHSC28810  Solanum parishii Laraine Roothoff 1979-3-31 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC90168  Solanum parishii Gary R. Koses 1979-3-31 18 Colusa Salt Canyon, n side of Salt Creek, hwy 20, 11 mi wsw of Williams. 143 Comment
  HSC66005  Solanum parishii Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 40 Colusa 5.4 mi. from Lodoga along little Stony Creek at Digger Pine Campground Comment
  NY821051  Solanum parishii R. S. Ferris 1917-4-14 590 Colusa Arbuckle - Rumsey Road; along Sand Creek Comment
  UCD57555  Solanum parishii Andrew Pedersen; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, at confluence with Craig Creek. 304 Comment
  JEPS16203  Solanum umbelliferum Rimo Bacigalupi, Arthur Holmgren 1950-4-25 3175 Colusa 10 mi nw of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  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
  CDA15550  Solidago canadensis subsp. elongata G. F. Hrusa 1998-10-28 14901 Colusa North Coast Ranges; Little Stony Ck. along Cedar Camp Rd. as it enters cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  JEPS105309  Solidago elongata Dean W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles West from junction Lagoda-Stonyford Road, 426 Comment
  UC1613356  Soliva sessilis Charles M. Belshaw Apr 1937 2873 Colusa vicinity Cook's Spring; Inner North Coast Range, Devil's Ridge Comment
  UCR238926  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2012-2-9 18531 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC235304  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  CAS-BOT-BC235305  Sorghum halepense Roxana Stinchfield 1918-7-9 408 Colusa Phillips ranch near Sycamore Comment
  SACT002290  Sorghum halepense Herbert Mason 1945-9-19 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River , 1 mile north of Colusa. Comment
  UCD92752  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  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
  UCR206354  Spergularia George K. Helmkamp, E. A. Helmkamp 2009-3-11 14382 Colusa Sacramento Valley, along CA-20, 0.1 mile east of its junction with I-5, north end of Williams 49 Comment
  CAS-BOT-BC390100  Spergularia bocconi A. A. Heller 1916-6-9 12392 Colusa Along the state highway near Colusa Comment
  UCD99217  Spergularia macrotheca var. leucantha Malcolm A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99 W, near Delevan. Comment
  CAS-BOT-BC390760  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  POM253415  Spergularia salina var. tenuis G. B. Rossbach, Ruth P. Rossbach 1938-5-31 636 Colusa 2 miles S of Maxwell. 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
  CHSC94516  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110534  Stachys ajugoides var. rigida Lowell Ahart 2006-10-31 13539 Colusa On the south side of road M 10, about 6 miles by road west of Stonyford 583 Comment
  JEPS94742  Stachys albens Vernon H. Oswald and Lowell Ahart 1998-7-15 9268 Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  JEPS95791  Stachys albens Vernon H. Oswald and L. Ahart 1999-6-22 9784 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 Stonyford-Lodoga Road; Little Stony Creek; 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  RSA0118630  Stachys albens Lowell A. Ahart 2013-10-1 19079 Colusa Strand of East Park Reservoir, about 2.5 miles (air) southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 365 Comment
  UCD55468  Stachys albens Ellen Dean; Gordon Harrington 2006-10-6 3288 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  JEPS108769  Stachys pycnantha Lowell Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UCD66928  Stachys stricta Craig D. Thomsen; G. Harrington 2008-7-6 2772 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
  SEINET10836144  Stapfia colusana Davy 1898-5-26 DAVY s.n. Colusa Near Princeton, on road to Norman Comment
  CAS-BOT-BC374775  Stebbinsoseris heterocarpa Roxana S. Ferris 1917-4-14 570 Colusa 7 mi west of Arbuckle, Arbuckle - Rumsey Road 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