Search Results — 2000 specimen records retrieved (1636 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC80223  Abutilon theophrasti B. Castro; G. Kuenster 2000-7-19 1200 Colusa Vicinity of Maxwell, Golden Gate in Logan Ridge, Funks Creek, and the Glenn-Colusa canal, at edge of a levee road along an un-named drainage through agricultural land. 42 Comment
  POM194544  Acer macrophyllum Unspecified 1929-4-21 2383 Colusa Sonoran Valley Comment
Read comments
Aug 13 2014
  CAS-BOT-BC334176  Acer negundo var. californicum Roxana S. Ferris 1926-4-22 6301 Colusa near Sycamore Comment
  JEPS81339  Achillea millefolium L. R. Heckard and J. C. Hickman 1982-7-6 5952 Colusa West Peak; Snow Mountain 2103 Comment
  UCR205146  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14252 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SEINET223541 Image available Achnatherum lemmonii L. R. Heckard 1972-7-10 3135 Colusa West of Trout Creek Snow Mt. 1829 Comment
  CAS-BOT-BC29878  Achyrachaena mollis Mrs. H. C. Cantelow 1936-4-11 1150 Colusa Bear Creek Canyon 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
  SEINET7062980  Achyrachaena mollis A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 mile south of Route 20 and near Bear Creek. UTM Zone 10, 555654mE, 4318071mN. (WGS84/NAD83). 320 Comment
  CHSC77336  Acmispon americanus var. americanus Heidi West; Joyces Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC30000  Acmispon brachycarpus John Griffith 1980-4-6 9 Colusa Ca. 6 mi s of Stonyford. 405 Comment
  UCD163235  Acmispon brachycarpus Craig D. Thomsen 2000-4-28 2250 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  SBBG100086  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-29 2240 Colusa Trough Spring Ridge Rd, 0.2 mi N of its jct with Crackerbox Ridge Rd, ca. 6.5 air mi SE of Stonyford 1127 Comment
  UCR261720  Acmispon rubriflorus Ann Howald 2003-5-30 2354 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road 397 Comment
  UCR261727  Acmispon rubriflorus Ann Howald 2003-6-9 2363 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, east of Sleepy Hollow camping area 383 Comment
  HSC44246  Acmispon wrangelianus Barbara Kelly 1977-4-24 351 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  HSC72174  Acmispon wrangelianus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9551 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD66470  Acmispon wrangelianus Craig D. Thomsen 2001-4-12 2461 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  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
  JEPS75833  Aconitum columbianum L. R. Heckard 1974-9-11 3943 Colusa s.e. Foutch Camp (just e. of large rocky outcroppings, Snow Mt.); Snow Mt. 1859 Comment
  JEPS80827  Aconitum columbianum L. R. Heckard and J. C. Hickman 1981-7-31 5799 Colusa e. side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1645 Comment
  CAS-BOT-BC133151  Adenostoma fasciculatum Roxana S. Ferris 1917-4-14 594 Colusa 5 mi west of Arbuckle along Sand Creek, Arbuckle - Rumsey Road Comment
  CHSC1534  Adenostoma fasciculatum V. Holt 1935-5-12 Colusa Near Stonyford. 335 Comment
  UC1733758  Adenostoma fasciculatum Kay H. Beach 1940-5-16 1259 Colusa Colusa and Lake county line Comment
  UC205569  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains e. of R.R. Hershey 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
  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
  CDA4023  Aeschynomene rudis G. Costa, S. Scardaci 1990-8-28 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4025  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  CDA4026  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  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
  UCD14572  Aeschynomene rudis June McCaskill; with Jim Hill 1990-9-5 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  SFV15098  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
  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
  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
  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
  UCSC010468  Agoseris heterophylla var. cryptopleura Dylan M. Neubauer, Tim Forsell 2016-3-31 595 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  JEPS51468  Agrostemma githago Alice King 1906-1 Colusa Arbuckle near College City Comment
  UCD92450  Agrostis Beecher Crampton 1958-5-19 4811 Colusa West of Lodoga. Little Stony Creek. Comment
  JEPS110359  Agrostis avenacea Lowell Ahart 2006-8-22 13227 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC71458  Agrostis exarata Vernon H. Oswald; Lowell Ahart 1998-7-15 9273 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS75878  Agrostis exarata L. R. Heckard 1974-9-10 3914 Colusa ne slope West Peak (Snow Mt); Snow Mt., West Peak 2072 Comment
  RSA724965  Agrostis exarata L. Ahart 2006-8-9 13167 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  UCD57115  Allium Gordon Harrington; Diana Hickson 2007-4-7 0019 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  CHSC112205  Allium amplectens Lowell Ahart 2013-5-1 18682 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC84321  Allium amplectens Lowell Ahart 2003-7-14 10380 Colusa Along a small drainage, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  POM174568  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford. Comment
  UCD163213  Allium amplectens Craig D. Thomsen 2000-4-28 2207 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD66451  Allium amplectens Craig D. Thomsen 2000-5-11 2297 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
  UCD81213  Allium amplectens Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5550 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destanella Flat area on the S side of Hwy. 20. 574 Comment
  UCD82518  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2875 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCR261630  Allium amplectens Ann Howald 2003-3-26 2291 A 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
  UCD141844  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  CHSC14088  Allium falcifolium L. V. Ritter 1969-4-30 239 Colusa Ca. 100 yds. W of the junction of Highway 20 and 16, Ca 50 yds. N of Highway 20. Comment
  CHSC70819  Allium falcifolium B. Castro; D. Isle, L. Hanson, B. Corbin, E. Earl, L. Janeway 1995-4-28 565 Colusa On Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn of Walker Ridge Rd and Bartlett Springs Rd, ca 300 ft E of Lake Co. line. 716 Comment
  CHSC90866  Allium falcifolium D. Isle 2003-6-25 217 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. Rd. 16N03. 1767 Comment
  CAS-BOT-BC467302  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford Comment
  UCD141834  Allium falcifolium L. K. Mann 1957-5-30 s.n. Colusa road from Goat Mt. Lookout to Upper Lett's Valley. 1524 Comment
  UCD141787  Allium fimbriatum M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa Bear Valley Road (sign to Wilbur Springs) past fenced area after leaving junction of California 16 and 20. Comment
  CAS-BOT-BC135886  Allium fimbriatum subsp. purdyi James Jokerst 1985-4-5 2204 Colusa Wilbur Springs Quad., near Coyote Peak 456 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
  RSA32757  Allium fimbriatum var. purdyi A. A. Heller 1940-5-6 s.n. Colusa Summit of the grade on Hwy 20, at the Lake Co. line 232 Comment
  UC518939  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake county line w Wilbur Springs Comment
  UCD138532  Allium fimbriatum var. purdyi G. L. Stebbins Jr. 1962-5-6 6026 Colusa along Highway No. 20, Bear Creek, between Williams and Lower Lake, at Colusa-Lake County line. Comment
  UCD141786  Allium fimbriatum var. purdyi L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa Bear Valley Road (beyond sign to Wilbur Springs) past fenced area on right after leaving junction of California 16 and 20. Comment
  UCD141858  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa California Highway #20 at Lake County - Colusa County Line. 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
  UCD57301  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. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 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
  SBBG128800  Allium fimbriatum var. purdyi L. Ahart, J. Dittes, J. Guardino 2013-4-26 18641 Colusa rocky serpentine outcrop on N side of St Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  UC725287  Allium fimbriatum var. purdyi A. A. Heller June, 1937 Colusa Lake Landing Comment
  CAS-BOT-BC475546  Allium serra A. A. Heller 1919-5-10 13112 Colusa Grade east of Leesville in the oak belt on open grassy slopes. Comment
  POM269061  Allium serra Lyman Benson 1933-4-16 4327 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  RSA550227  Allium serra D. W. McNeal, David W. Isle 1991-5-22 3821 Colusa Above highway 162, 4.3 miles east of the Stony Creek Bridge, north of Elk Creek. Comment
  UCD141798  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa ca. 8.8 miles west of Maxwell (U.S. Highway 99W) or ca. 0.6 mile east of Sites, about 180 feet northwest of bridge and old stone house. Comment
  UCD141826  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa ca. 8.8 miles west of Maxwell (U.S. Highway 99W) or ca. 0.6 mile east of Sites about 180 feet northwest of bridge and old stone house. Comment
  HSC45664  Allophyllum gilioides Sheila Logan 1978-4-22 84 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80786  Alnus incana subsp. tenuifolia L. R. Heckard and J. C. Hickman 1981-7-30 5759 Colusa s.e. side Snow Mt. (Trout Creek); , Trout Creek 1584 Comment
  CDA12377  Alnus rhombifolia G. F. Hrusa 1996-1-2 12630 Colusa Inner North Coast Ranges; Little Stony Creek, +/- 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  CHSC94310  Alnus rhombifolia Lowell Ahart 2006-8-9 13108 Colusa Gravel bar on the north side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  JEPS80816  Alnus rhombifolia L. R. Heckard and J. C. Hickman 1981-7-31 5789 Colusa Trout Creek-Box Spring trail Snow Mt., Paradise Creek (along creek, e side of mt.) 1371 Comment
  UC1051700  Alnus rhombifolia Helen K. Sharsmith 1953-6-21 4310 Colusa near Stonyford; Inner North Coast Ranges, Big Stoney Creek 518 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
  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
  CHSC80135  Amaranthus blitoides B. Castro; G. Kuenster 2000-7-19 1206 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, near edge of pond on shallow intermittent stream channel just W of powerlines. 48 Comment
  JEPS120702  Amaranthus californicus Lowell Ahart 2013-10-1 19089 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CHSC94986  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS104399  Ambrosia psilostachya Lowell Ahart 2003-10-23 10659 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  JEPS110533  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford 347 Comment
  CAS-BOT-BC55586  Ambrosia psilostachya Milo S. Baker 1946-9-4 11591 Colusa Butte Sink, along Gridley-Princeton Road Comment
  CDA20509  Ambrosia psilostachya D. Isle 2004-11-17 DI 2 -04 Colusa Northwestern California; Just N of Stony Creek, N of Stonyford and S of the Glenn county line. 344 Comment
  CHSC29712  Ammannia robusta K. R. Stern 1980-6-30 6650 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD102890  Ammannia robusta P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Cortina. 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
  SBBG126065  Amsinckia lunaris G. K. Helmkamp with E. A. Helmkamp 2009-3-11 14368 Colusa St Hwy 20, 9.7 mi SW of Williams, on N side of Salt Crk 162 Comment
  SD237359  Amsinckia lunaris G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Ranges Foothills: along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek. 162 Comment
  UC1199518  Amsinckia lunaris Annetta Carter 1938-5-8 1385 Colusa 3 mi n Leesville (on Lodoga Road) Comment
  UCD63713  Amsinckia lunaris Craig D. Thomsen 2008-3-30 2722 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, near ridgeline and headwaters of Eula Canyon drainage. 501 Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  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
  RSA0089733  Amsinckia lunaris J. P. Smith, T. Nelson, Jane Nelson 1978-4-2 9575 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UC1093625  Amsinckia lycopsoides Francia Chisaki, Gene B. Newcomb 1958-4-1 1096 Colusa on road to Lodoga and Wilbur Springs (0.5 mi nw of junction with Hwy 20) Comment
  UC727131  Amsinckia lycopsoides A. A. Heller 1940-5-14 15620 Colusa 4 mi n Maxwell (in a field) Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC48170  Ancistrocarphus filagineus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3934 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  HSC72168  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9543 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  JEPS16206  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (w of base of grade to Indian Valley (Bartlett Mt. Road)) Bear Valley; Inner North Coast Ranges, Indian Valley, Bear Valley Comment
  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
  UCD64285  Ancistrocarphus filagineus Craig D. Thomsen 2000-3-31 2118 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  CHSC105170  Angelica tomentosa B. Castro; L. P. Janeway 1999-7-5 1013 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, at Bear Wallow Spring. In serpentine substrate on NNW-facing slope W of Lovelady Ridge rd ca 0.5 mi N of its jcn with USFS Rd 16N06, 0.5 mi NE of Pacific Point. 1045 Comment
  JEPS82989  Angelica tomentosa L. R. Heckard 1983-7-27 6103 Colusa 2 mi w of Stonyford Road (along Little Stony Creek); Little Stony Creek 411 Comment
  CAS-BOT-BC84714  Anthemis cotula Roxana Stinchfield 1916-6-15 275 Colusa College City 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
  CHSC101033  Anthriscus caucalis John Dittes 2008-3-14 1514 Colusa Great Central Valley; Sacramento Valley; between Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air mile south of Gridley Road, ca. 1.1 air mile west of Drumheller Slough; 17 Comment
  UCD163652  Antirrhinum cornutum Craig Thomsen 1998-6-10 1950 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD164147  Antirrhinum cornutum Craig Thomsen 1997-6-21 1929 Colusa Bear Valley. About 8 miles north of Hwy 20, central Bear Valley. Comment
  CAS-BOT-BC237912  Antirrhinum subcordatum Rattan 1940-6-7 s.n. Colusa On the ridge east of Lodogo. On Stony Creek, not far from this station Comment
  UCD66699  Antirrhinum vexillocalyculatum Craig D. Thomsen 2000-6-23 2406 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS104394  Antirrhinum vexillocalyculatum subsp. intermedium Lowell Ahart 2003-7-14 10388 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 Comment
  JEPS127573  Antirrhinum virga David Isle 2015-6-20 2155 Colusa North Coast Ranges: ~3.75 miles W of Stonyford and ~100 yards S of road 18N01; S of Bob Angulo mobile hone; on E edge of old 4x4 road/firebreak in chaparral. (Gilmore Peak 7.5' Quad.) Comment
  UCD123477  Antirrhinum virga A. M. Shapiro 1994-6-13 s.n. Colusa just north of Goat Mountain Rd. on Sullivan Ridge. 914 Comment
  UCD64506  Aphanes occidentalis Craig D. Thomsen 2000-3-31 2093 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  JEPS87723  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  JEPS81276  Apocynum cannabinum L. R. Heckard and J. C. Hickman 1982-7-5 5886 Colusa Summit Springs s. side of Snow Mt. (slope below (s. of) area); , Summit Springs 1500 Comment
  JEPS95645  Apocynum cannabinum Vernon H. Oswald and L. Ahart 1999-6-18 9773 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate 624 Comment
  CHSC48685  Aquilegia eximia Vernon Oswald 1984-7-20 1625 Colusa M10, 5.4 mi w of Rd. 306 at Stonyford. 609 Comment
  JEPS75709  Aralia californica Alice Q. Howard 1972-7-10 13 Colusa Paradise Creek at crossing of trail between Fouts Camp and Box Springs; Snow Mt. 1371 Comment
  UCD66930  Arceuthobium campylopodum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail. Large, dammed stock pond, holding water still, in middle of meadow. 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
  UCR225254B  Arceuthobium occidentale Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch, several hundred feet downslope of ridge trail, along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  UCD50538  Arctostaphylos canescens G. L. Webster 1989-5-6 7700 Colusa Near border with Lake County, Pinus attenuata woods on crest of Walker Ridge, near Cold Springs Mountain. Comment
  UC1051740  Arctostaphylos canescens subsp. canescens Helen K. Sharsmith 1953-6-20 4296 Colusa n slope Goat Mountain; Inner North Coast Ranges, Mendocino National Forest 1828 Comment
  CDA34806  Arctostaphylos canescens subsp. sonomensis Peter Warner 2010-5-16 153 Colusa Walker Ridge Road, ~18.4 km N of jct. with Hwy. 20, along E (Colusa Co.) side of road, on slopes above Zimory Canyon to the west, Trout Creek to the east, and adjacent slopes on both sides of the road. Comment
  UCD13384  Arctostaphylos glandulosa Charles Martin 1986-5-17 34 Colusa Medocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service rd. 18 NO1 on Forest Service Rd 17 NO2. Comment
  UCD51022  Arctostaphylos glandulosa var. glandulosa G. L. Webster 1989-5-6 4699 Colusa Near border with Lake County; on Walker Ridge, near Cold Spring Mountain. Comment
  UCD72452  Arctostaphylos manzanita Ellen Dean; Gordon Harrington 2006-11-10 3313 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Along road between Roadkill Cafe and Cache Creek. 411 Comment
  UCD84554  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
  SEINET11989687  Arctostaphylos manzanita R. A. DeMartile 1982-1 s.n. Colusa between Sites & Ladoga 244 Comment
  JEPS73519  Arctostaphylos manzanita subsp. elegans L. R. Heckard 1972-7-10 3137 A Colusa between Foutch Camp and Trout Creek crossing; Snow Mt. 1828 Comment
  CAS-BOT-BC24378  Arctostaphylos manzanita subsp. manzanita Richard A. DeMartile 1982-10-10 s.n. Colusa Road between Ladoga and Goat Mountain Lookout. 914 Comment
  SEINET7258424  Arctostaphylos manzanita subsp. roofii R. R. Halse 2014-3-25 9034 Colusa Along the Bear Valley Road ca. 1.8 mi WNW of its junction with State Hwy. 20. 378 Comment
  CHSC92610  Arctostaphylos manzanita subsp. wieslanderi D. Isle 2005-7-14 1151 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Boardcamp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  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
  CHSC88555  Arctostaphylos viscida subsp. pulchella L. P. Janeway; B. Castro 2001-6-3 7095 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
  SBBG114894  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Colusa Brim Rd 396 Comment
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Dec 10 2014
  SBBG50847  Arctostaphylos viscida subsp. viscida S. C. Schank 1960-4-10 51 Colusa above Cache Crk, 2 mi NW of jct of Hwy 16 and Hwy 20 on rd to Bear Valley Comment
  JEPS80132  Arenaria congesta var. congesta L. R. Heckard with J. Hickman 1980-7-1 5291 Colusa Trail from Summit Springs Frog Pond ((ca. 10 mi w of Stonyford)); Snow Mt. 1737 Comment
  UCD82129  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD82434  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CHSC94476  Argemone munita subsp. munita Lowell Ahart 2006-8-9 13163 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC401742  Argemone munita subsp. rotundata L. Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station, Inner North Coast Ranges 548 Comment
  CAS-BOT-BC401745  Argemone munita subsp. rotundata Roxana S. Ferris 1926-4-23 6455 Colusa Field at Stonyford 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
  CAS-BOT-BC400398  Aristolochia californica Roxana Stinchfield 1916-7-8 377 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC400399  Aristolochia californica Roxana S. Ferris 1926-4-22 6308 Colusa Sycamore Slough near Sycamore 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
  JEPS110139  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  UC71769  Artemisia douglasiana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD81224  Artemisia douglasiana Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5561 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. 443 Comment
  UCD121262  Asclepias cordifolia Jack Major 1966-6-6 s.n. Colusa At junction of Frenzel Creek with Stony Creek. 426 Comment
  JEPS15567  Asclepias fascicularis G. Thomas Robbins with L. R. Heckard 1956-7-25 3714 Colusa above Dark Hollow Creek (tributary of Middle Fork Stony Creek) (s flank of Snow Mt. East, at lower edge of cirque between Snow Mt. East and Snow Mt. West); Snow Mt. East 1981 Comment
  UCD164137  Asclepias speciosa Craig Thomsen 2000-6-12 2364 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS80758  Asclepias speciosa L. R. Heckard and J. C. Hickman 1981-7-29 5725 Colusa above Summit Springs (s side of mountain); Snow Mt., Colusa-Lake County Boundary 1554 Comment
  SEINET12319578  Asteraceae K. A. Smail 1978-1 s.n. Colusa ca 0.3 mi W of jct Hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  CHSC91565  Astragalus clevelandii D. Isle 1995-7-12 393 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Adjacent to BLM parcel 281-C. 585 Comment
  UCD58179  Astragalus clevelandii Gordon Harrington 2007-5-31 69 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
  UCD64032  Astragalus clevelandii Craig D. Thomsen 2000-6-23 2411 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  CDA11399  Astragalus gambelianus G. F. Hrusa, K. van Katwyk 1995-4-22 12119 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  UC83408  Astragalus gambelianus Katharine Brandegee april 1889 Colusa Colusa Junction Comment
  UCD163837  Astragalus gambelianus Craig D. Thomsen 2001-4-12 2466 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD104819  Astragalus gambelianus J. M. Tucker 1958-3-7 3363 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  JEPS75764  Astragalus purshii var. tinctus L. R. Heckard and R. Bacigalupi 1976-9-6 4453 Colusa above Summit Springs (Snow Mt., Colusa-Lake County Line); Snow Mt., above Summit Springs 1645 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
  HSC44108  Astragalus rattanii var. jepsonianus Barbara Kelly 1977-4-24 390 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
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Jul 31 2014
  RSA424724  Astragalus rattanii var. jepsonianus Aaron Liston, M. Blumler 1987-4-26 667 -3 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  RSA475238  Astragalus rattanii var. jepsonianus Aaron Liston, Sara Meury 1988-5-31 751 -1 Colusa Bear Valley; 8.1 miles N of Hwy 20. 400 Comment
  UCD15422  Astragalus rattanii var. jepsonianus Margit Sands 1985-4-13 25 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
  UCD163317  Astragalus rattanii var. jepsonianus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD163326  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2009-5-3 2791 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  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
  UCD57293  Astragalus rattanii var. jepsonianus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3664 Colusa BLM Payne Ranch. Near origin of Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 359 Comment
  UCD63037  Astragalus rattanii var. jepsonianus Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along unnamed tributary of Bear Creek. 322 Comment
  UCD63923  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR212305  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-5-11 2291 B Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UCR212345  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-4-12 2144 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  UC82603  Astragalus tener var. ferrisiae Katharine Brandegee May 1884 Colusa Mountain House (=Mountain Home road sta.) Comment
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Feb 28 2006
  CHSC87153  Athysanus pusillus Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  JEPS53214  Athysanus pusillus W. L. Jepson 16277 Colusa Lodoga, in Coast Range foothills, w Colusa County Lodoga; Coast Range foothills, Lodoga 457 Comment
  SEINET4673879  Athysanus pusillus Richard R. Halse 2013-3-27 8763 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwys. 20 and 53.; 0 558 Comment
  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
  CDA22995  Atriplex argentea Mike Pitcairn 2008-8-2 PDR# 1440792 Colusa Colusa Wildlife Refuge, 1.5 miles S of Hwy 20 0 Comment
  CHSC107932  Atriplex argentea var. mohavensis B. Castro; L. Janeway 2011-7-9 1893 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. In swale about 400 ft north of large +- alkaline marsh; and widely scattered along NW and E edges of marsh.. 49 Comment
  CHSC107969  Atriplex argentea var. mohavensis B. Castro; Amy Lyons 2011-8-3 1899 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately I mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. At SW end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  CHSC61030  Atriplex coronata var. coronata Vernon H. Oswald; Mike Wolder, Joe Silveira. 1993-7-26 5701 Colusa Colusa National Wildlife Refuge. Tract 18 on the S side of the refuge, ca. 1 mi W of Ohm Rd., ca. 1 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  CHSC60279  Atriplex depressa K. R. Stern 1980-6-30 6654 Colusa Vernal Pool, south central border area of Colusa National Wildlife Refuge. 45 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
  JEPS90590  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
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Jun 18 2015
  JEPS90596  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  CHSC80183  Atriplex fruticulosa B. Castro; G. Kuenster 2000-7-19 1208 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 42 Comment
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 Comment
  UCD97410  Atriplex fruticulosa P. B. Kennedy 30-31 May 1922 s.n. Colusa Colusa County. Comment
  CHSC83634  Atriplex joaquinana L. P. Janeway 2002-4-25 7526 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 Comment
  CHSC108070  Atriplex micrantha B. Castro; Dave Boegner 2011-9-1 1911 Colusa Sacramento Valley. Larkins Childrens Rancho. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 600 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Common around outer western edges of managed +- saline wetland of Gunnersfeld Ranch duck hunting club, among patches of tules and cattails. On and just below berms. 17 Comment
  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
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UC72556  Atriplex serenana var. serenana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD56224  Avena barbata Beecher Crampton 1958-4-21 4727 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  UCD57056  Avena barbata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3644 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  SEINET10517556  Avena barbata Roxana S. Ferris 1917-4-18 Ferris 691 Colusa Zsni west of Arlrickle in open field. Comment
  SEINET3919631  Avena barbata J. P. Smith, Thomas Nelson; Jane P. Nelson 1978-4-2 9559 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20.; 0 366 Comment
  SEINET3919645  Avena barbata Patricia Shesgreen 1978-4-22 33 Colusa Wilbur Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  CHSC86015  Avena fatua Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 121 Comment
  HSC66008  Avena fatua Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 43 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UCD56362  Avena fatua Beecher Crampton 1962-4-17 6213 Colusa Sycamore. Comment
  UCD66443  Avena fatua Craig D. Thomsen 2000-4-28 2212 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD66444  Avena fatua Craig D. Thomsen 2000-4-28 2213 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
  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
  HSC79084  Baccharis salicifolia C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 30 Colusa Mendocino National Forest, Digger Pine Campground, 10 miles SW of Stonyford via Lodoga-Stonyford and Goat Mtn. Rd. 457 Comment
  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
  CHSC69867  Balsamorhiza macrolepis var. macrolepis B. Castro; B. Corbin, K. Earll, L. Hanson, D. Isle, L. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and Walker Ridge Rd. (Site is a few hundred feet E of Lake Co. line.) 716 Comment
  CDA396  Bassia hyssopifolia L. Ahart 2003-8-15 10509 Colusa On the south side oof Highway 20, about 1 mile southwest of Williams. 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
  CHSC85963  Bellardia trixago Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 137 Comment
  HSC90794  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of E Park Reservoir N of Lodoga 366 Comment
  SD131864  Bergia texana Barbara Ertter, Elizabeth Neese, et al. 1989-10-21 8869 Colusa Southeast end of East Park Reservoir north of Lodoga. 365 Comment
  UCSB61646  Bergia texana Ertter, Barbara 1989-10-21 Colusa SE end of East Park Reservoir N of Lodoga 365 Comment
  UC1532346  Berula incisa Vernon Oswald 1986-6-30 2171 Colusa Fouts Spring Road (M10) at Candy Bucket Spring, 6.0 miles W of Road 306, 0.4 mi E of junction John Smith Road (M5). Comment
  CHSC94746  Bidens frondosa Lowell Ahart 2006-9-26 13344 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. Comment
  JEPS80391  Boechera repanda L. R. Heckard, and J. Hickman 1981-6-22 5624 Colusa Dark Hollow trail Snow Mt. 1965 Comment
  CHSC117122  Boehmeria cylindrica B. Castro; Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd. off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  CHSC117123  Boehmeria cylindrica B. Castro; Tom Boullion 2009-8-24 1800 G-1 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  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
  CHSC82037  Bolboschoenus glaucus L. P. Janeway 2001-6-13 7172 Colusa Sacramento Valley. Along Norman Road 5.0 km east of Hwy 99W and Hwy I-5. 23 Comment
  CAS-BOT-BC28201  Bolboschoenus glaucus Maxine Wilkes 1929-8-1 s.n. Colusa Unspecified Comment
  CAS-BOT-BC31371  Bolboschoenus maritimus Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-7-11 467 Colusa Davis tule, near Sycamore Slough Comment
  UCD61436  Brassica nigra Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3881 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  CAS-BOT-BC30254  Brassica nigra Gordon H. True 1974-11-15 7841 Colusa On Delevan Road just west of Four Mile Road, 4 miles east of Delevan. 27 Comment
  CDA16108  Brickellia californica G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15245 Colusa North Coast Ranges; Along Leesville Rd. 365 Comment
  UCD82536  Briza maxima Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  SEINET7075565  Brodiaea elegans A. G. Vestal 1955-4-5 3684 Colusa In mountains [Cortina Ridge] west of Williams on Route 20 at Salt Canyon. 39? deg. 6' 22" North Latitude, -122? deg. 19' 15" West Longitude. UTM Zone 10, 558719mE, 4328566mN. (NAD 27)]. [Coordinate Datum: WGS84/NAD83]. Comment
  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
  UCD82131  Brodiaea elegans subsp. elegans Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5657 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC144360  Bromus William Bancroft 1958-7-5 s.n. Colusa Summit of Snow Mountain, Colusa-Lake County line. Comment
  RSA724892  Bromus arenarius L. Ahart 2006-8-22 13216 Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  SEINET3921515  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa Colusa County, 10.1 miles southeast of Leesville, east of foothills known as Three Sisters.; 0 Comment
  CAS-BOT-BC155997  Bromus diandrus Roxana S. Ferris 1926-4-21 6277 Colusa Sycamore Slough 2 miles from Sycamore. Comment
  JEPS75408  Bromus hordeaceus W. L. Jepson 1932-5-8 16289 Colusa Stonyford 365 Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 Comment
  UCD58684  Bromus hordeaceus A. A. Beetle 1942-5-21 3272 Colusa 12 miles north of Williams. Comment
  SEINET10514562  Bromus hordeaceus Roxana S. Ferris 1917-4-12 Ferris 527 Colusa 4 miles E of Williams. Alkali Plains. Comment
  UCD63103  Bromus japonicus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4934 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  UCD66447  Bromus japonicus Craig D. Thomsen 2000-5-11 2292 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCR228650  Bromus japonicus Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4934 Colusa Payne Ranch, owned by BLM, lands to the southwest of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20 348 Comment
  UCD58884  Bromus laevipes Helen K. Sharsmith 1953-6-19 4266 Colusa Inner North Coast Ranges. Mendocino National Forest. Red Bridge Camp. Near confluence of North and Middle forks of Stoney Creek. 548 Comment
  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
  HSC23360  Bromus madritensis subsp. rubens J. D. Dagray 1970-4-4 3 Colusa 10 mi. W of Williams on Hwy. 20 122 Comment
  JEPS80793  Bromus orcuttianus L. R. Heckard and J. C. Hickman 1981-7-30 5763 Colusa se Snow Mountain, going down Trout Creek Trout Creek; Snow Mountain, Trout Creek 1569 Comment
  RSA724142  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET5320896  Bromus rubens Unknown 2002-3-21 6130 Colusa Williams; By junction of 5th Street and B Street 20 Comment
  SEINET3923292  Bromus rubens Christopher Knopp 1978-4-22 17 Colusa Wilbur Springs Quad. Bear Valley Road 1.5 miles from its junction with State Route 20.; 0 411 Comment
  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
  CHSC112207  Calandrinia breweri Lowell Ahart 2013-5-1 18673 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD163910  Calandrinia ciliata Sara Martin 2016-4-9 3 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Southwest of corral at junction of 16 and 20, junction of meadow and hill. 325 Comment
  UCD57308  Calandrinia ciliata Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3679 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  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
  UCD100196  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Walker Ridge, along Walker Ridge Rd. nr. Turn-off to Bear Valley on north end; serpentine. Comment
  NY465060  Callitriche marginata A. A. Heller 1902-5-2 5440 Colusa Princeton Comment
  UC1101520  Callitriche marginata S. Galen Smith and G. T. Robbins 1950-4-15 1906 Colusa Bear Valley Comment
  CHSC112277  Calochortus amabilis Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18640 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC2225  Calochortus amabilis V. Holt 1946-4-18 Colusa Cache Creek. 243 Comment
  UC1733753  Calochortus amabilis Kay H. Beach 1940-5-16 660 Colusa Colusa and Lake county line 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
  JEPS61682  Calochortus luteus Alice King May 1906 Colusa College City Comment
  UCD57617  Calochortus luteus Jill Poloske; 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. Near the intersection of Thompson Canyon and Craig Canyon. West of spring, the headwaters of Craig Creek. 365 Comment
  RSA601304  Calochortus luteus Jens Clausen 1935-5-20 1011 Colusa 18 mi W of Williams on Bartlett Springs Road. Past the Stonyford road. Comment
  CAS-BOT-BC483486  Calochortus splendens Greg de Nevers; S. Charnley 1995-5-27 10735 Colusa Snow Mountain 914 Comment
  CHSC2243  Calochortus splendens D. Smith 1935-5-12 Colusa Stonyford Hills. Comment
  UC616859  Calochortus splendens L. Constance 1939-5-14 2491 Colusa 2.5 mi e Bonnie View (above Middle Fork of Stony Creek, e base of Snow Mountain); Inner North Coast Ranges, Snow Mountain 518 Comment
  HSC45509  Calochortus uniflorus M. Alcasas 1978-4-23 59 Colusa Bear Valley Rd., 4.7 mi. from Bartlett Springs Rd. 457 Comment
  JEPS15268  Calochortus uniflorus Rimo Bacigalupi with G. T. Robbins, S. Galen Smith, and Peter Kamb 1950-4-16 3126 Colusa along Bear Creek, along road following the length of Bear Valley, at about its middle, close to BM 1326 ft, w-most Colusa County Bear Valley, Bear Creek Comment
  UC1049544  Calochortus uniflorus Rimo Bacigalupi 1950-4-16 3126 Colusa Bear Creek, along road down middle of Bear Valley, about BM 1326 Bear Valley Comment
  CAS-BOT-BC270757  Calycadenia pauciflora Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Comment
  CHSC78601  Calycadenia pauciflora J. Marr; H. West 1998-5-27 Colusa Vicinity of Sites Peak, Antelope Valley and Antelope Creek. 137 Comment
  UCD146725  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1/2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCD84638  Calycadenia pauciflora G. Harrington 2009-7-7 85 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  UCR261752  Calycadenia pauciflora Ann Howald 2003-5-29 2351 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  CAS-BOT-BC270747  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Creek Trail, 0.5 mile NW of driveway to Fout Springs Boy's Ranch 502 Comment
  CAS-BOT-BC270748  Calycadenia pauciflora Gerald D. Carr 1971-7-29 605 Colusa 1.7 miles W of Lodoga on road to Stoneyford 411 Comment
  CAS-BOT-BC270749  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles N of Stoneyford on road to Fout Springs 609 Comment
  RSA255558  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 miles east of Lake County line on Bartlett Springs Road Comment
  RSA255559  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs road on Walker Ridge Road, Buck Flat 869 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  UC1876242  Calycadenia pauciflora Gerald D. Carr 1972-8-2 723 Colusa 0.6 mi W of Leesville-Lodoga Rd. on road to Cooks Springs. Comment
  UC1876243  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mi E of Lake Co. line on Bartlett Springs Rd. Comment
  UC1876636  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 mi SW of Leesville on road to Bartlett Spr. Comment
  UC1971709  Calycadenia pauciflora 1978-8-20 2152 Colusa Colusa-Lake Co. line on Hwy 20, E of Clearlake Oaks (=GDC 703) 570 Comment
  UCD129838  Calycadenia pauciflora Gerald D. Carr 1972-7-29 721 Colusa 3.1 miles south of Bartlett Springs Road on Walker Ridge Road, Buck Flat. 868 Comment
  UCD129839  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles east of Walker Ridge Road on Deadshot Road. 731 Comment
  UCSB6412  Calycadenia pauciflora Keator, Glenn 1958-6-16 Colusa Along road from Lower Lake to Sacramento Valley just east of Lake-Colusa county line Comment
  UCD13380  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa 2.8 miles west of Stonyford, along Foot Springs Rd. 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
  JEPS81077  Calyptridium quadripetalum Thomas W. Nelson and Jane P. Nelson 1980-6-24 5880 Colusa along trail to Snow Mountain trail head at Summit Springs, Six Rivers National Forest Summit Springs (Lake Pillsbury Quadrangle); Six Rivers National Forest, Snow Mountain trail 1584 Comment
  UC1731405  Calyptridium quadripetalum Dean W. Taylor 1998-6-23 16713 A Colusa ca. 1 mi. s.e. Baldy Mt. (stock pond at head Doyle Canyon); N. coast Range Region (NCoRI), Walker Ridge, Doyle Canyon 853 Comment
  CDA39872  Calystegia collina T. C. Fuller 1958-5-27 3670 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS94202  Calystegia collina subsp. oxyphylla Vernon Oswald and Lowell Ahart 1998-5-7 9000 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  UCD82493  Calystegia collina subsp. oxyphylla Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5682 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCSB4973  Calystegia occidentalis Keator, Glenn 1958-6-16 Colusa Foothills west of Bartlett Springs Comment
  UCD81718  Calystegia occidentalis subsp. occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5723 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  CHSC100287  Camassia quamash David Isle 1990-6-6 1517 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East end Upper Summit Valley 'lake' edge, MDMB (South of Road 17N10). 1694 Comment
  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
  UC71985  Camissonia contorta Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  CHSC70985  Camissoniopsis hirtella Vernon Oswald; Lowell Ahart 1998-5-7 9004 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
  UCD37191  Camissoniopsis hirtella Beecher Crampton 1958-5-19 4807 Colusa 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  JEPS120912  Campanula angustiflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18653 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  CAS-BOT-BC37027  Capsella bursa-pastoris Roxana S. Ferris 1917-4-12 519 Colusa 4 miles east of Williams. Alkali Plains. Comment
  JEPS80202  Capsella bursa-pastoris L. R. Heckard and J. Hickman 1980-7-3 5357 Colusa 10 mi w of Stonyford (around Summit Springs, sw flank of Snow Mountain); Snow Mountain 1548 Comment
  UCR238927  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2012-2-9 18532 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  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
  UCD64043  Cardamine oligosperma Craig D. Thomsen 2000-3-8 2033 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CDA6843  Carduus acanthoides G. D. Barbe, N. Palmer 1982-6-4 3639 Colusa 1.7 miles north of Pacific Ridge Forest Station, Mendocino National Forest. Comment
  JEPS120997  Carduus pycnocephalus subsp. pycnocephalus Lowell Ahart 2013-5-1 18660 Colusa Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  JEPS110538  Carex amplifolia Lowell Ahart 2006-10-31 13536 Colusa Big Springs, on the south side of Letts Lake, about 13 miles (air) southwest of Stonyford 1529 Comment
  CDA33019  Carex angustata P. T. Zwanck 1964-4-28 Colusa 5 miles north of Colusa, on levee. 0 Comment
  JEPS80862  Carex aurea L. R. Heckard and J. C. Hickman 1981-7-30 5744 Colusa Trout Creek Trail, se slope of Snow Mt. Snow Mt., Trout Creek Trail 1661 Comment
  CAS-BOT-BC19164  Carex barbarae R. F. Hoover 1938-4-23 3210 Colusa Upper Sand Creek. Comment
  CHSC92598  Carex bolanderi D. Isle 2005-7-14 1145 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In first perennial drainage west of junction 17N09 diagonal 17N10 about 40 yards above culvert crossing 17N09. Waypoint BDCMP 1: NAD27 10S 0523113E 4350662N. Comment
  RSA523880  Carex bolanderi Barbara Ertter 1989-7-1 8607 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
  JEPS110407  Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS80377  Carex densa L. R. Heckard and J. Hickman 1981-6-22 5610 Colusa S side of E ridge of E Peak, Snow Mountain 1950 Comment
  SEINET7556704 Image available Carex densa Lowell Ahart 2006-8-22 13213 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC21226  Carex fracta Alice Q. Howard 1972-7-10 7 Colusa Snow Mountain. 1676 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
  CAS-BOT-BC35776  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa Snow Mt.;northeast slope of West Peak 2072 Comment
  CHSC92669  Carex pachystachya D. Isle 2005-9-14 1173 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Meadow west of Angel Spring, Snow Mountain Wilderness. 10S 0522348E 4358185N = Angel Springs. Comment
  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
  UCD82623  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2893 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC45069  Carex serratodens Vernon Oswald 1984-5-2 1169 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18N01) 5.9 mi w of Stonyford. 609 Comment
  CHSC55605  Carex serratodens James Jokerst 1985-4-5 2213 Colusa Near Coyote Peak. 608 Comment
  JEPS80863  Carex serratodens L. R. Heckard and J. C. Hickman 1981-7-30 5745 Colusa Trout Creek trail, se slope of Snow Mt. Snow Mt., Trout Creek trail 1661 Comment
  UCD67060  Carex serratodens Craig D. Thomsen 2008-3-20 2716 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 600 Comment
  UCD82442  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5666 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
  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
  UCD83799  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
  UCR228280  Carex serratodens Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4946 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
  HSC36255  Carex serratodens Steven Lagos 1974-5-4 48 Colusa 915 Comment
  JEPS80376  Carex subfusca L. R. Heckard and J. Hickman 1981-6-22 5609 Colusa s side of e ridge of East Peak Snow Mt., East Peak 1950 Comment
  JEPS83817  Carex subfusca L. R. Heckard 1972-7-8 3040 a Colusa on n side of ridge running se West Peak; Snow Mt. 2011 Comment
  CDA15498  Carex tumulicola G. F. Hrusa, T. D. Wilfred 1998-6-19 14635 Colusa North Coast Ranges; Near Goat Mtn. summit, adj. to intersection at Lake Co. boundary. NW side of summit area. Comment
  UCD72514  Carex vulpinoidea Jack Alderson 2008-6-1 s. n. Colusa southwest of Williams, intersection of Walnut Drive and Stovall Road. Comment
  UCD23340  Castilleja A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. 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
  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
  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
  JEPS124209  Castilleja attenuata Lowell Ahart 2015-4-10 20005 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  SD239905  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites (Sites 7.5'Q) 77 Comment
  UCR261655  Castilleja attenuata Ann Howald 2003-4-24 2323 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, west side of Little Stony Creek, near service road 356 Comment
  UCR148774  Castilleja exserta E. Witharm 1998-4-17 6 Colusa Bear Valley, Bear Valley Rd., 8 road mi from junction of Bear Valley Rd. and Leesville-Lodoga Rd 396 Comment
  UCD15677  Castilleja exserta Anne B. Overturf 1989-4-8 13 Colusa Lake County border. Walker Ridge. 658 Comment
  JEPS124238  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-1 20000 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  SEINET3079797 Image available Castilleja exserta subsp. exserta L. Blackford, S. Branch, D. Malm 1988-4-17 73 Colusa 1.3 miles south of Bear Valley Rd. from corner of Brim Rd. and Bear Valley Rd. 396 Comment
  HSC67098  Castilleja exserta subsp. exserta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 42 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  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
  JEPS80826  Castilleja miniata L. R. Heckard and J. C. Hickman 1981-7-31 5798 Colusa e side Snow Mt. (Dark Hollow Creek); , Dark Hollow Creek 1615 Comment
  JEPS81325  Castilleja miniata L. R. Heckard and J. C. Hickman 1982-7-6 5940 Colusa about 0.5 mi ne Summit Springs (s side of Snow Mt, e of trail); Snow Mt. 1645 Comment
  UCD64031  Castilleja minor subsp. spiralis Craig D. Thomsen 2000-6-23 2409 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCR40060  Castilleja rubicundula subsp. lithospermoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 27 Colusa Bear Valley, Brim Road, 2.9 mi west of Leesvillle-Lodoga Junction 418 Comment
  UCD123056  Castilleja rubicundula subsp. lithospermoides Barrie Stanford 1966-4-16 27 Colusa Bear Valley, 5 miles north of Wilbur Springs. Comment
  CHSC1826  Castilleja rubicundula subsp. rubicundula L. Oliver; D. Sloan 1935-5-7 Colusa Stonyford. 365 Comment
  CHSC27625  Castilleja rubicundula subsp. rubicundula Timothy Spora; Robert Schlising 1978-5-13 3246 Colusa Ca 0.5 mi NW jct Hwy 20 and Bear Valley (= Wilber Springs) Road, along latter. Comment
  JEPS11156  Castilleja rubicundula subsp. rubicundula W. L. Jepson 1932-5-8 16284 Colusa Stonyford; w Colusa County 365 Comment
  JEPS121116  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2013-5-1 18687 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS124233  Castilleja rubicundula subsp. rubicundula Lowell Ahart 2015-4-1 19987 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  JEPS44112  Castilleja rubicundula subsp. rubicundula Barrie Stanfield 1966-4-16 27 Colusa 5 mi n Wilbur Springs turnoff (Bear Valley bottomlands); Bear Valley Comment
  JEPS81972  Castilleja rubicundula subsp. rubicundula Rimo Bacigalupi, T. Crovello and L. Heckard 1965-4-26 9042 Colusa 0.7 mi w Wilbur Springs and Bear Valley junction (on Blue Ridge along Bear Creek Road); Blue Ridge 341 Comment
  UC1282150  Castilleja rubicundula subsp. rubicundula Annetta Carter and Louise Kellogg 1953-6-20 3239 Colusa 6 mi n Wilbur Springs Junction (road to Leesville); Inner North Coast Ranges 400 Comment
  UC1745724  Castilleja rubicundula subsp. rubicundula Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1395 Colusa Bear Creek Canyon, 4.4 mi. SE of Wilbur Springs. Comment
  UC903276  Castilleja rubicundula subsp. rubicundula Ethel Crum 1932-5-7 1458 Colusa Lodoga Comment
  UCD123057  Castilleja rubicundula subsp. rubicundula John M. Tucker 1980-5-3 4444 Colusa Bear Valley, 4.3 mi. south of junction of Brim Road and Bear Valley Road. 396 Comment
  UCD114215  Caulanthus flavescens J. M. Tucker 1958-3-7 3364 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  CHSC112311  Caulanthus lasiophyllus Lowell Ahart 2013-5-1 18681 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  CDA12246  Ceanothus cuneatus G. F. Hrusa 1989-2-7 5808 Colusa Inner North Coast Ranges; Leesville Road between Bear Valley & Williams. Comment
  RSA399079  Ceanothus cuneatus Carolyn Sanford 1977-4-24 352 Colusa Above Barrel Springs Campground. 701 Comment
  UCD56939  Ceanothus cuneatus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3541 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CAS-BOT-BC50803  Ceanothus integerrimus Brent Helm; Curtis Miller; Mark Steiger 1988-4-16 74 Colusa 2.4 miles west on Goat Mountain Rd., off of Lodoga-Stonyford Rd. 441 Comment
  JEPS82411  Ceanothus integerrimus L. R. Heckard 1969-5-28 Colusa ca 6 air mi w Stonyford (along Soney Creek near Fouts Springs) Comment
  UCD170263  Ceanothus integerrimus D. O. Burge 2016-11-3 2187 Colusa Little Stony Creek watershed, roadside on Goat Mountain Road. 415 Comment
  UCD56664  Ceanothus jepsonii Sam Bledsoe 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. 576 Comment
  SEINET13945967 Image available Ceanothus jepsonii Thomas E. Higley 1974-1 69 Colusa 3/4 mi N of T junction ofIndian Valley; 2800 ft alt., T14N R6W SEC12 Comment
  RSA712418  Ceanothus jepsonii subsp. albiflorus C. L. schmidt 1989-5-6 1249 Colusa 1 mile up dirt road to Trout creek near Davis Campsite and Fouts Springs Campground, 9 miles W of Stonyford. Serpentine of E side of Snow Mtn. 600 Comment
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UC1299512  Ceanothus palmeri Freed W. Hoffman 1947-6-19 1655 Colusa Cook's Springs Cook's Springs (western Colusa County) Comment
  CDA15500  Ceanothus parryi G. F. Hrusa, WTD 1998-6-19 14637 Colusa North Coast Ranges; Trough Ridge Rd. (to Fouts Springs, from Pacific Ridge Rd.) Comment
  UCD148667  Ceanothus parvifolius G. Ledyard Stebbins 1985-5-19 C 530 Colusa Southeast of Goat Mountain peak. Pacific Point along Goat Rock Ridge, east of Goat Rock. (Exact location unknown; coordinates estimated by label maker. Note, Pacific Point at 3700 ft does not quite fall into Section 25.) 1127 Comment
  IRVC29846  Centaurea solstitialis Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4993 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  SEINET251844  Centaurea solstitialis L. Shultz, J. Shultz 1986-9-20 10225 Colusa Ca. 10 miles west of Colusa on Highway 20 Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City 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
  JEPS93803  Centaurium trichanthum Vernon H. Oswald and Lowell Ahart 1998-7-15 9267 A Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road; Bartlett Springs Road 487 Comment
  JEPS94758  Centaurium trichanthum Vernon H. Oswald and Lowell Ahart 1998-7-15 9267 B Colusa Bartlett Springs Road 1.6 mi w of Bear Valley Road 487 Comment
  UCD63776  Centromadia parryi subsp. parryi Craig D. Thomsen 2008-5-31 2757 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  CHSC107928  Centromadia parryi subsp. rudis B. Castro; Amy Lyons 2011-8-3 1903 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Towards S end of N-trending swale, off northwest corner of large +- alkaline marsh. 49 Comment
  UC894340  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 197 Colusa near Colusa Comment
  CHSC105205  Centromadia pungens subsp. septentrionalis K. R. Stern 1980-6-1 6643 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC222990  Cephalanthus occidentalis Roxana Stinchfield 1916-7-8 399 Colusa Sycamore Slough, Stinchfield ranch 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
  CHSC84633  Cercis occidentalis Matt Quinn 2001-3-31 38 Colusa Found along drainage flowing out of Bear Valley, near Wilbur Hot Springs, north of Highway 20. 405 Comment
  HSC66011  Cercis occidentalis Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 46 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  RSA0034161  Cercis occidentalis M. Bourell 1997-3-29 5771 Colusa Mendocino National Forest. Dixie Glade Campground. 918 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
  UCR37606  Cercis occidentalis C. Houseman, M. A. Strull, L. Linstedt 1984-4-29 14 Colusa Bear Valley Rd., 2 mi north of Hwy 20 366 Comment
  CDA15468  Cercocarpus betuloides G. F. Hrusa, WTD 1998-6-19 14605 Colusa North Coast Ranges; Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. Comment
  CHSC1542  Cercocarpus betuloides E. Gabel 1935-5-10 Colusa Stonyford. 335 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
  UCD83634  Cercocarpus betuloides Fanny Ye; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 Comment
  CHSC79561  Cercocarpus betuloides var. betuloides B. Castro; L. P. Janeway 2000-5-4 1131 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 268 Comment
  UC1543051  Cercocarpus betuloides var. betuloides Donald G. Nelson et. al. 1940-6-8 679 Colusa several mi above Bonnie View (w boundary of Snow Mountain, Snow Mountain Trail); Snow Mountain, Snow Mountain Trail 1066 Comment
  UCD113068  Cercocarpus betuloides var. betuloides G. L. Webster 1989-5-6 7698 Colusa Near border with Lake County. Crest of Walker Ridge, near Cold Springs Mountain. Comment
  HSC95708  Cercocarpus montanus var. glaber G. Fred Hrusa 1998-6-19 14605 Colusa Above upper Little Stony Creek, Goat Mtn. Rd., 1.5 km W of campground 485 Comment
  UC1299287  Chaenactis douglasii var. douglasii Freed W. Hoffman 1947-6-20 1614 Colusa near Trough Springs; North Coast Ranges, Goat Mountain 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
  CHSC53931  Chaenactis glabriuscula var. heterocarpha Vernon H. Oswald 1991-4-21 4518 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  CHSC70964  Chaenactis glabriuscula var. heterocarpha Vernon Oswald; Lowell Ahart 1998-5-7 9011 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. Roadside banks. 633 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
  JEPS108745  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2006-8-9 13115 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  SBBG28478  Chamaesyce serpillifolia subsp. serpillifolia Mrs. H. P. Bracelin 1931-10-1 565 Colusa Indian Crk, Lodoga Comment
  UC525846  Chamaesyce serpyllifolia Mrs. H. P. Bracelin 1931-10-1 566 Colusa 5 mi s Stonyford; Big Stony Creek 243 Comment
  CHSC39804  Cheilanthes covillei Ruby Gist 1935-5-11 Colusa Stonyford. Comment
  JEPS87672  Cheilanthes covillei Vernon H. Oswald and Lowell Ahart 1994-4-6 6061 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mt Rd at Sullivan Creek) 469 Comment
  JEPS83164  Chenopodium L. R. Heckard with J. Hickman 1980-7-3 5331 a Colusa just w Summit Springs (Colusa-Lake Co. border); SW Snow Mt. 1548 Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC77561  Chenopodium album Heidi West; Jenny Marr, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Salt Lake and Sites. 97 Comment
  CHSC94440  Chenopodium album Lowell Ahart 2006-8-9 13120 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94517  Chenopodium album Lowell Ahart 2006-8-22 13221 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA724893  Chenopodium album L. Ahart 2006-8-22 13221 -A Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS108912  Chenopodium botrys Lowell Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC114994  Chenopodium californicum Lowell Ahart 2015-4-28 20112 Colusa High bank on the west side of Leesville-Lodoga Road, about 300 yards north of the intersection of Bear Valley Road and Brim Road, Bear Valley, about 2 miles southwest of Leesville, about 14 1/2 miles(air) west of Williams. 395 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
  UCR225460  Chenopodium californicum Craig D. Thomsen 2000-4-28 2225 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
  HSC66138  Chenopodium californicum C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 47 Colusa Along Bartlett Springs Rd., .6 mi. from Jct. with Hwy. 16 Comment
  UC1191335  Chenopodium strictum var. glaucophyllum Herbert L. Mason and Verne Grant 1946-8-7 12978 Colusa 8 mi n Colusa; Butte Sink Comment
  CAS-BOT-BC184905  Chloris virgata Margaret J. Williams 1981-9-2 81 -162 Colusa On Wisconsin Avenue, south of Arbuckle. Comment
  CHSC77630  Chlorogalum pomeridianum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  CDA39316  Chlorogalum pomeridianum T. C. Fuller 1958-5-27 3661 Colusa South of Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  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
  SEINET7042721  Chrysothamnus parryi A. G. Vestal 1938-9-1 s.n. Colusa Along the top of a trough, Springs Ridge near Foxtrap Springs. Fouts Spring quadrangle UTM Zone 10, 530960mE, 4350980mN. Comment
  UC1532347  Cicuta Vernon Oswald 1986-6-30 2176 Colusa North end of Lily Pond near Letts Lake. 1188 Comment
  CHSC93137  Cicuta douglasii D. Isle 2001-7-26 1388 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In spring west of Letts Lake day use area. Comment
  CDA1157  Cirsium cymosum T. C. Fuller 1958-5-27 3667 -A Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  SEINET3840083  Cirsium cymosum T. C. Fuller 1958-5-27 3667 Colusa south of highway 20, 1 mile west of the junction with highway 16 Comment
  JEPS81831  Cirsium cymosum var. cymosum L. R. Heckard 1969-5-28 2230 Colusa just below Candy Bucket Springs (on Stoneyford-Fouts Spring road) 670 Comment
  JEPS82545  Cirsium cymosum var. cymosum L. R. Heckard 1983-7-27 6116 Colusa about 1/4 mi w Summit Springs (s side of mt.); Snow Mt. 1500 Comment
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  CAS-BOT-BC228699  Cistanthe umbellata Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5029 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp 1989 Comment
  CHSC86125  Clarkia affinis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UCD64519  Clarkia affinis Craig D. Thomsen 2000-4-12 2121 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD72458  Clarkia affinis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3792 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  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-BC160914  Clarkia amoena subsp. amoena C. Hart Merriam 1923-1-1 s.n. Colusa Indian rancheria, Stony Ford Comment
  CHSC94884  Clarkia concinna subsp. concinna Lowell Ahart 2006-6-11 12668 Colusa On the west 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
  RSA163460  Clarkia concinna subsp. concinna Roxana S. Ferris 1926-4-23 6408 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  SJSU11006  Clarkia concinna subsp. concinna J. B. Willis Jr 1969-5-31 200 Colusa by State Hwy 20, 0.5 mi W of junction with Hwy16 c. midway between Williams & Clear Lake Comment
Read comments
Aug 26 2011
  POM216174  Clarkia concinna subsp. concinna D. D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  HSC66132  Clarkia gracilis Cathie Goldberg, Lynn Kunstman, Geoff Walsh, Lauren Philbrick 1980-4-19 52 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  CHSC86869  Clarkia gracilis subsp. gracilis B. Castro; Shirley Innecken 2003-4-9 1417 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. 164 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
  CAS-BOT-BC172035  Clarkia gracilis subsp. gracilis Tamara Gedik; Thom Heinz; Rebecca Siegle 1996-5-4 52 Colusa 8.4 mi. north of Indian Reservoir Rd. on Walker Ridge Rd., campground. 670 Comment
  CDA12217  Clarkia gracilis subsp. tracyi G. F. Hrusa 1993-6-1 11165 Colusa North Coast Biodiversity Arena; Bear Valley-Bartlett Springs Rd. midway up east side of Walker ridge. Comment
  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
  UCD63104  Clarkia gracilis subsp. tracyi Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4935 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  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
  UCR138658  Clarkia purpurea A. Burgard, J. Goldsmith, J. Kalt 1996-5-4 72 Colusa 8.4 mi north of Indian Reservoir Road on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  SEINET8726150 Image available Clarkia purpurea Helen K. Sharsmith 1953-1 s.n. Colusa Above Mill Creek near Fouts Springs, Mendocino National Forest, altitude 2000 feet. 610 Comment
  UCD104856  Clarkia purpurea Kathryn Johnson 1966-5-14 53 Colusa Ca. 2 miles E of Lodoga on road from Maxwell. Comment
  CHSC85962  Clarkia purpurea subsp. quadrivulnera Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  CHSC89878  Clarkia purpurea subsp. quadrivulnera B. Castro; L. Janeway 2001-5-10 1247 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Andys Canyon. Near dirt road paralleling N-S-trending perennial creek, on moderately steep NNE-facing slope, just down from blue oaks in grassy opening. 390 Comment
  UCD64423  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2180 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD64427  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen 2000-4-28 2201 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD84560  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CHSC79780  Clarkia rhomboidea G. F. Hrusa 1998-6-19 14604 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~2 km. W of campground. UTM: 10S 05351 N, 43466 E. 490 Comment
  CHSC62848  Claytonia exigua subsp. exigua Vernon H. Oswald; Lowell Ahart 1994-3-23 6015 Colusa Frenzel Creek Research Natural Area on the S side of Liitle Stony Creek, in the section on the E side of Frenzel Creek, S of Stonyford. 518 Comment
  CHSC86514  Claytonia exigua subsp. exigua B. Castro 2003-3-17 1383 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 188 Comment
  JEPS124232  Claytonia exigua subsp. exigua Lowell Ahart 2015-4-1 19994 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  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
  UCD65633  Claytonia exigua subsp. exigua Craig D. Thomsen 2000-4-12 2136 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
  UCD66462  Claytonia exigua subsp. exigua Craig D. Thomsen 2001-4-12 2457 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
  CHSC62941  Claytonia exigua subsp. glauca Vernon H. Oswald; Lowell Ahart 1994-4-6 6055 Colusa Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford. Locally abundant on gravelly soil of a roadside bank. 463 Comment
  UCD67063  Claytonia parviflora Craig D. Thomsen 2008-3-20 2717 Colusa BLM Payne Ranch. Lands to the SW of Hwy 20/16 intersection. South side of Hwy 20, about 0.5 mile west of Hwy 16/20 intersection, at Colusa Co. milepost 2.63. 450 Comment
  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
  HSC45739  Claytonia parviflora subsp. parviflora Sheila Logan 1978-4-22 55 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1745698  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1379 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UC638660  Claytonia parviflora subsp. parviflora Ethel Crum 1938-5-8 2023 Colusa 3 mi n Leesville; Inner Coast Range Comment
  CHSC91500  Claytonia parviflora subsp. viridis D. Isle 1995-5-20 401 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Just S of Mrs. Brown's trailer, now owned by Harry Petersen, 10' from trailer. 377 Comment
  UCD65634  Claytonia perfoliata Craig D. Thomsen 2000-4-12 2137 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS15557  Claytonia saxosa G. Thomas Robbins with L. R. Heckard 1956-7-25 3724 Colusa 0.25 mi s Snow Mt. West summit (on ridge forming s extension of Snow Mt. West, Lake-Colusa County boundary); Snow Mt. West 2103 Comment
  CHSC81292  Clematis lasiantha L. P. Janeway; B. Castro 2001-4-26 7027 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Canyon. 286 Comment
  UCD81223  Clematis lasiantha Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5560 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. 443 Comment
  CHSC55589  Collinsia grandiflora Jennie J. Dubose 1991-4-6 20 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC57516  Collinsia grandiflora Lance E. Neuman 1987-4-4 5 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UCD123553  Collinsia greenei G. Ledyard Stebbins Jr. 1964-7-4 6170 Colusa northeast side of Mt. St. John, west of Stonyford. 1524 Comment
  CHSC33348  Collinsia heterophylla R. M. Winchell 1980-4-12 1 Colusa Ca. 0.3 mi. w of jct. of Hwys. 20 and 16, s side of Bear Creek, ca. 18 mi. sw of Williams. 321 Comment
  UCD58103  Collinsia sparsiflora Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3350 Colusa Payne Ranch. Along Hwy. 20, just E of Lake Co. border. Ca. 3 road miles west of juncture with Hwy. 16, ca. 0.4 road mile east of Destanella Flat. South side of road. 536 Comment
  RSA0016802  Collinsia sparsiflora Aaron Liston, M. Blumler 1987-4-26 667 -4 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  CHSC70908  Collinsia sparsiflora var. arvensis Vernon Oswald; Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodga Rd. 4.2 mi south of Stonyford. 384 Comment
  CHSC77468  Collinsia sparsiflora var. arvensis Vernon H. Oswald 2000-3-29 9905 Colusa Hwy. 20 600 ft west of Bear Creek, 0.25 mi west of Hwy. 16. 323 Comment
  UCD57726  Collinsia sparsiflora var. arvensis Jordan Thompson; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. North side of Craig Creek on south side of unimproved road. 335 Comment
  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
  POM273490  Collinsia sparsiflora var. arvensis Lyman D. Benson 1933-4-16 4332 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  UC103381  Collinsia sparsiflora var. collina Katharine Brandegee Colusa Eppersons Comment
  UC1736363  Collinsia sparsiflora var. collina Dean W. Taylor 1992-4-16 12404 Colusa East Park Reservoir, on stony hillsides ca. 0.4 miles due west from spillway into Little Stony Creek 411 Comment
  UC638654  Collinsia sparsiflora var. collina Ethel Crum 1938-5-8 2029 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC725811  Collinsia sparsiflora var. sparsiflora A. A. Heller 1937-4-24 Colusa 15 mi w of Williams Comment
  JEPS81379  Collinsia torreyi var. latifolia L. R. Heckard and J. C. Hickman 1982-7-8 5990 Colusa trail from Saddle between East and West Peaks towards Signal Peak Snow Mt. 2042 Comment
  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
  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
  UCD81711  Collomia diversifolia Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5717 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
  CAS-BOT-BC229534  Collomia diversifolia G. L. Stebbins 1968-5-15 6686 Colusa S end of Walker Ridge, N of State Highway 20 762 Comment
  JEPS80138  Collomia tinctoria L. R. Heckard with J. Hickman 1980-7-2 5298 Colusa just above Summit Spring entrance to Snow Mt. trail (ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1630 Comment
  UCD138921  Corallorhiza maculata J. M. Tucker; L. K. Mann 1959-5-30 3530 Colusa small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1219 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
  NY28942  Cordylanthus palmatus D. W. Taylor 1988-8-8 10024 Colusa This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UC2042496  Cordylanthus pilosus Holly Forbes and Barbara Keller 2009-7-1 Colusa Walker Ridge Rd about 6.2 mi. N of junction with Highway 20. Comment
  JEPS80717  Cordylanthus pilosus subsp. pilosus L. R. Heckard and J. C. Hickman 1981-7-28 5677 Colusa 3.7 km e Ladoga Bridge (w of Maxwell, along roadside) Comment
  JEPS66469  Cordylanthus pilosus subsp. pilosus G. D. Carr 1971-7-29 604 Colusa Lodoga, Lodoga-Stoneyford Rd 396 Comment
  JEPS68404  Cordylanthus pilosus subsp. pilosus L. R. Heckard 1972-7-10 3147 Colusa Ladoga 487 Comment
  UCD63123  Cordylanthus tenuis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4953 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
  JEPS118675  Cotula coronopifolia B. Castro, L. P. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  SEINET7836975 Image available Cotula coronopifolia R. R. Halse 2007-3-23 7109 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  UCD84428  Crocanthemum scoparium Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6043 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CHSC94477  Croton setiger Lowell Ahart 2006-8-9 13114 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SACT000805  Crypsis aculeata Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa Comment
  JEPS120800  Crypsis alopecuroides Lowell Ahart 2013-10-1 19075 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
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC77404  Crypsis schoenoides Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  UCD163653  Crypsis schoenoides Craig Thomsen 1998-6-10 1951 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD59814  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  UCD59931  Crypsis schoenoides Beecher Crampton 1958-6-27 4987 Colusa 3.5 miles south of Colusa. Comment
  CAS-BOT-BC190166  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 miles south of Colusa. 15 Comment
  RSA126601  Crypsis vaginiflora H. S. Yates 1936-8-14 6136 Colusa 6 miles S. of Grimes 15 Comment
  RSA756393  Crypsis vaginiflora Barbara Ertter, Elizabeth Nesse, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  UCD59983  Crypsis vaginiflora H. L. Mason 1945-7-11 12643 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. 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
  UCD56671  Cryptantha Jack Alderson 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  UCD56918  Cryptantha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3521 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  HSC45712  Cryptantha affinis Sheila Logan 1978-4-22 77 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  SD211562  Cryptantha affinis Barbara Ertter 1989-7-1 8615 Colusa Road to Goat Mount Lookout 1.7 miles South of Route M-10 (Bear Creek-Fouts Spring Road) at head of South Fork Stony Creek, circa 12 airmiles West-Southwest of Stonyford; at bend in road. 1463 Comment
  SEINET4206983  Cryptantha clevelandii var. dissita D. W. McNeal 1982-5-2 2632 Colusa On a rd. bank above Hwy. #20 at the Lake-Colus Co. line.; 0 Comment
  SBBG40520  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Crk cyn N of Hwy 20 (near Wilbur Springs) Comment
  HSC45688  Cryptantha flaccida Patricia Shesgreen 1978-4-22 31 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC45735  Cryptantha flaccida M. Alcasas 1978-4-22 43 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1613300  Cryptantha flaccida Charles M. Belshaw April 1937 2881 Colusa vicinity of Cook's Spring (Inner North Coast Ranges, Devil's Ridge); Inner North Coast Ranges, Devil's Ridge Comment
  UCD58117  Cryptantha flaccida Ellen Dean; PLB 102 Class 2007-4-29 3712 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  UC729980  Cryptantha hispidula Leo F. Koch 1940-4-29 935 Colusa 4 mi from Lake County line (along Highway 20) Comment
  UCD163229  Cryptantha hispidula Craig D. Thomsen 2000-4-28 2532 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  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
  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
  UC726038  Cryptantha intermedia A. A. Heller 1940-5-6 15581 Colusa near Lake County line on State Highway 20 (near a bench mark) 232 Comment
  UCD57302  Cryptantha intermedia Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. Above Thompson Creek. 366 Comment
  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
  UCD67097  Cryptantha intermedia Ellen Dean; Davis Botanical Society 2008-5-31 5025 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCR198141  Cryptantha intermedia Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3673 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon, above Thompson Creek 366 Comment
  SBBG29133  Cryptantha intermedia L. Constance 1939-5-14 2489 Colusa 0.5 mi E of Mill Crk Ranger Station 548 Comment
  UCD37192  Cryptantha intermedia Beecher Crampton 1958-5-19 4820 Colusa Colusa County, 4-8 miles south of Lodoga, Little Stony Creek Canyon. Comment
  HSC48168  Cryptantha intermedia var. hendersonii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3932 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  UC638663  Cryptantha microstachys Ethel Crum 1938-5-7 2019 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UC78682  Cryptantha microstachys K. Brandegee Apr 1889 Colusa Epperson's Comment
  UC1051698  Cryptantha milobakeri Helen K. Sharsmith 1953-6-19 4279 Colusa 1 mi n Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 914 Comment
  CDA15473  Cryptantha muricata G. F. Hrusa, WTD 1998-6-19 14610 Colusa North Coast Ranges; Ridge above Little Stony Creek drainage on Goat Mtn. Rd. below intersection with USFS Pacific Ridge Rd. (M5). Comment
  UC1212061  Cryptantha muricata C. R. Bell 1950-4-26 770 Colusa w of Leesville (on road to Bartlett Springs, halfway up e side of county-line ridge) Comment
  JEPS67743  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w. Arbuckle (Sand Creek foothills); Sand Creek foothills Comment
  UCD66964  Cryptantha torreyana Ellen Dean; Davis Botanical Society 2008-5-31 5008 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  JEPS87788  Cupressus sargentii Vernon H. Oswald and Lowell Ahart 1994-3-23 6010 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  JEPS95531  Cupressus sargentii Vernon H. Oswald and L. Ahart 1994-3-23 6010 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
  UC1585395  Cupressus sargentii R. Raiche 1989-11-1 90339 Colusa W of Williams, NW of Wilbur Springs, Walker Ridge, Freshwate Branch of E Fork Sulphur Creek between Signal Rock and Oak Grove 730 Comment
  UCD125755  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UCD37715  Cuscuta brachycalyx Beecher Crampton 1961-7-20 5935 Colusa 4 miles SE of Grimes, along Knight's Landing Road. Comment
  UC1191660  Cuscuta indecora Herbert L. Mason and Verne Grant 1946-8-6 12974 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  CHSC32212  Cycladenia humilis var. humilis James Jokerst 1980-8-7 1063 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
Read comments
Jun 8 2007
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  CHSC62839  Cynoglossum grande Vernon H. Oswald; Lowell Ahart 1994-3-23 6023 Colusa Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford. On slopes along the creek. 490 Comment
  RSA0060513  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  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
  JEPS73505  Cynoglossum occidentale L. R. Heckard 1972-7-10 3122 Colusa near Trout Creek crossing of trail to Box Spring; Snow Mt. 1828 Comment
  UCD61465  Cynosurus echinatus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3911 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  UC837462  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule near Sycamore Slough Comment
  POM313109  Cyperus acuminatus H. L. Mason, Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles north of Colusa between Sacramento River and Butte Creek Comment
  UCD141015  Cyperus difformis P. B. Kennedy 1922-5-30 s.n. Colusa Cortena. Comment
  UCD141021  Cyperus difformis June McCaskill 1954-8-23 372 Colusa 7 miles east of Arbuckle, jus north of the road east from Arbuckle. Comment
  CHSC94430  Cyperus eragrostis Lowell Ahart 2006-8-22 13209 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1100528  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13113 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UC1100519  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa 1 mi. n. Colusa (e. bank Sacramento R., below causeway over Butte Sink spillway,); Sacramento R. Comment
  UCD141054  Cyperus erythrorhizos H. L. Mason 1945-9-19 12724 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  CAS-BOT-BC114384  Cyperus erythrorhizos Roxania Strichfield 1916-7-9 419 Colusa Overflow land in Oak grove along Sacramento River. Philips Ranch near Sycamore. Comment
  UC1100629  Cyperus odoratus Malcolm A. Nobs and S. Galen Smith 1949-9-9 1871 Colusa 3 mi. w. Williams Comment
  JEPS120794  Cypselea humifusa Lowell Ahart 2013-10-1 19073 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CHSC91049  Cystopteris fragilis D. Isle 2003-6-9 361 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In drainage that feeds Cedar Creek. 1447 Comment
  CAS-BOT-BC445508  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  CAS-BOT-BC445509  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  POM208587  Damasonium californicum A. A. Heller, H. E. Brown 1902-5-1 519 Colusa Near Colusa. Comment
  UC194964  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Colusa Sacramento Valley, Colusa Comment
  CAS-BOT-BC445507  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  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
  JEPS95650  Datisca glomerata Vernon H. Oswald and L. Ahart 1999-6-22 9787 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate. Herbaceous perennial ca. 1 m tall on the rocky bank of Little Stony Creek. 426 Comment
  RSA724817  Datura wrightii L. Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1.5 miles (air) east of East Park Reservoir, about 4.5 miles (air) northeast of Lodoga. 546 Comment
  UCD57059  Daucus pusillus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3653 Colusa BLM Payne Ranch, mouth of Craig Canyon, along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  JEPS80869  Delphinium antoninum L. R. Heckard 1972-7-8 3051 Colusa n side of ridge running se Snow Mt.; West Peak 2011 Comment
  UC1096411  Delphinium antoninum Helen K. Sharsmith 1956-6-30 4404 Colusa Linger Longer Camp Inner North Coast Ranges, Mendocino National Forest, Goat Mo 1584 Comment
  CAS-BOT-BC10226  Delphinium hesperium Clinton Hart Merriam s.n. Colusa Indian Rancheria, Stony Ford Comment
  UCD18513  Delphinium hesperium Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley. Comment
  UCD95852  Delphinium hesperium June McCaskill 1962-5-2 652 Colusa On road along Bear Creek from State Highway 20 north to Leesville, 7 miles north of Wilbur Springs turnoff. Comment
  CHSC76785  Delphinium hesperium subsp. pallescens Mary Ann Griggs 1999-5-13 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  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
  UC1777719  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 Colusa Bear Valley Comment
  JEPS6254  Delphinium hesperium subsp. pallescens W. L. Jepson 1932-5-7 16261 Colusa Venado (2 mi. above, in a little valley), Southwestern Colusa County 304 Comment
  UC766123  Delphinium hesperium subsp. pallescens R. F. Hoover 1938-4-24 3225 Colusa ridge between Venata and Leesville Comment
  UCD63107  Delphinium patens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4938 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
  CHSC35564  Delphinium patens subsp. patens J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9567 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  SEINET12091405  Delphinium uliginosum R. A. DeMartile 1983-1 109 Colusa Bartlett Springs Road N of Baldy Mt 762 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
  HSC87806  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa About 200 yd W of road; on road along Bear Creek from State Hwy 20 N to Leesville, 3.6 mi N of Wilbur Springs turnoff Comment
  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
  UCD96738  Delphinium variegatum Clinton C. Shock 1980-5-3 65 Colusa Bear Valley, west side, ca 12 miles north of State Highway 20. 384 Comment
  UCR47948  Delphinium variegatum C. Pauls 1975-4-20 4 Colusa Bear Valley Rd., 8.7 mi north of State Hwy 20 Comment
  HSC95711  Delphinium variegatum A. Bebensee 1984-4-21 10 Colusa 9.8 mi. N of Hwy. 20 on Bear Valley Rd., 0.5 mi. into field on E side of rd. Comment
  UCD23391  Delphinium variegatum Robert E. Rolley 1977-5-8 23 Colusa Erect perennial herb, 10-30 cm tall, roots shallow and woody, leaves mostly basal, some are red edged. Leaves and stems covered by many short hairs. Flowers deep purple, upper petal white edged, spurred. Valley grassland. Dry, sunny, flat field. 9.5 miles north on Bear Valley Road from Highway 20. Comment
  UCD96729  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa 200 yards west of road, on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  CAS-BOT-BC16958  Delphinium variegatum subsp. variegatum Roxana S. Ferris 1926-4-23 6582 Colusa field 2 miles from Stonyford Comment
  CHSC1465  Delphinium variegatum subsp. variegatum 1946-4-18 Colusa Cache Creek. 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-BC192667  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 549 Colusa 4 miles East of Williams Comment
  CAS-BOT-BC192668  Deschampsia danthonioides Doris K. Kildale 1928-5-8 5019 Colusa 3 miles south of Arbuckle Comment
  CAS-BOT-BC192669  Deschampsia danthonioides L. R. Abrams 1928-5-8 12591 Colusa 2 miles south of Arbuckle Comment
  CAS-BOT-BC192671  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  CAS-BOT-BC192672  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  CHSC85968  Deschampsia danthonioides Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 91 Comment
  SD27858  Deschampsia danthonioides Carl B. Wolf 1928-5-8 2127 Colusa Sacramento Valley; 3 miles south of Arbuckle 42 Comment
  UC188868  Deschampsia danthonioides Miss M. Alice King 1905-1 Colusa near College City College City; Sacramento Valley 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
  SEINET10909286  Deschampsia danthonioides Roland McKee 1918-5-1 McKee s.n. Colusa Princeton. Comment
  JEPS75873  Deschampsia elongata L. R. Heckard 1974-9-9 3848 Colusa just s.e. of Foutch Camp (Snow Mt.); Snow Mt. 1920 Comment
  CHSC79752  Dicentra chrysantha L. P. Janeway; B. Castro 2000-5-1 6686 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 243 Comment
  CHSC110819  Dicentra chrysantha David Isle; Rhonda Isle 2013-5-19 2040 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. 0.1 mi W of Maxwell Grade Summit; Burned NW asp. S of Sites Lodoga Road. 548 Comment
  UC71643  Dichelostemma capitatum Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC500073  Dichelostemma capitatum Roxana S. Ferris 1917-4-14 600 Colusa 5 mi west of Arbuckle Comment
  CHSC27508  Dichelostemma capitatum subsp. capitatum Michael F. Henetz 1978-4-15 4 Colusa Ca. 100 m s of Hwy. 20, ca. 0.5 km w of junction of Hwy 20 and Hwy. 16, ca. 29 km s of Williams. 322 Comment
  CHSC81331  Dichelostemma capitatum subsp. capitatum J. Trizzino 2001-3-31 17 Colusa Bear Valley Meadow along east side of Bear Valley Road. 396 Comment
  HSC47745  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1978-4-29 3950 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 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
  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
  UCD57620  Dichelostemma volubile Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  CAS-BOT-BC277740  Dichelostemma volubile Mona Bourell 1997-3-29 5808 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  CHSC32197  Dieteria canescens var. shastensis James Jokerst 1980-8-8 1084 Colusa North Coast Ranges. Near Snow Mountain (west). 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
  CAS-BOT-BC208995  Digitaria sanguinalis Herbert L. Mason 1945-9-19 12722 Colusa Below causeway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  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
  SEINET8235421  Diplacus layneae Unknown 1959-5-27 1338 Colusa by Cooks Creek; about 1/4 mile east of Cooks Spring. Comment
  RSA0018384  Dipsacus fullonum Joan Stewart 1998-6-18 755 Colusa Bear Valley Comment
  CAS-BOT-BC208649  Distichlis spicata Roxana S. Ferris 1926-4-22 6291 Colusa 3 miles west of Colusa Comment
  SBBG119745  Distichlis spicata L. Ahart 2006-9-26 13353 Colusa N side of Maxwell Rd, between the deep ditch and the Delevan Nat Wildlife Refuge, ca. 3 mi W of Colusa Princeton Rd, ca. 5.5 mi E of Maxwell 24 Comment
  CHSC87159  Dodecatheon hendersonii Jenny Marr; Beth Hendrickson 1999-2-18 Colusa Vicinity of Funks Creek, Antelope Valley, and Sites. 121 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
  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
  CHSC107941  Downingia insignis B. Castro; Amy Lyons 2011-5-2 1880 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; Ca 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At S end of a grain field, in NW end of vernally moist swale connected to a large +- saline/alkaline wetland/ marsh about 0.2 mi to the S. 49 Comment
  CHSC29750  Downingia insignis K. R. Stern 1980-6-1 6637 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UC1192040  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa 3 mi e Maxwell Comment
  UC625519  Downingia insignis Frank W. Gould 1938-4-23 295 Colusa between Arbuckle and Williams Comment
  POM312375  Downingia insignis H. L. Mason 1953-4-5 14506 Colusa 3 miles east of Maxwell Comment
  JEPS33725  Downingia pulchella D. E. Breedlove 1963-5-30 5191 Colusa 5 mi w Leesville Comment
  POM59020  Downingia pulchella A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near College City. Comment
  UCD56935  Draba verna Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3537 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  JEPS73448  Drymocallis L. R. Heckard 1972-7-8 3045 Colusa on n side of ridge running se Snow Mt. (West Peak); se of Snow Mt., West Peak 2011 Comment
  HSC45678  Dudleya cymosa Stephen Plant 1978-4-22 203 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD14239  Dudleya cymosa Ed Taub 1974-4-28 109 Colusa Colusa County; off of Bear Valley Road, about 5 miles from Highway 20; 304 Comment
  JEPS120799  Dysphania ambrosioides Lowell Ahart 2013-10-1 19088 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CHSC94317  Dysphania botrys Lowell Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CAS-BOT-BC197058  Echinochloa crus-galli Milo S. Baker 1944-7-18 10871 Colusa A few mi. W. of Williams along Highway to Lake Co. Comment
  UCD32928  Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa Colusa County, 4.5 miles south of Grimes. Comment
  UCD60930  Echinochloa crus-galli P. B. Kennedy 1928-9-15 Colusa Cortena. Rice station. Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CDA1985  Echinochloa muricata E. A. Biondi 1972-1 Colusa Colusa. 0 Comment
  UCD61064  Echinochloa muricata P. B. Kennedy 30-31 May 1922 Colusa Colusa. Comment
  UCD61107  Echinochloa oryzicola P. B. Kennedy 1925-9-18 Colusa Cortena. Comment
  UCD61175  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Cortena. Comment
  UCD61179  Echinochloa oryzoides Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCD137952  Echinodorus berteroi P. B. Kennedy 1925-9-1 s.n. Colusa Cortina. Comment
  UCD38843  Echinodorus berteroi Beecher Crampton 1958-6-27 4983 Colusa Colusa County; five miles south of Colusa. Comment
  HSC60471  Ehrendorferia chrysantha J. P. Smith 1977-4-24 9038 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD63619  Ehrendorferia chrysantha Craig D. Thomsen 2000-6-12 2369 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Between Cache Creek Ridge and Brophy Canyon, about 5 miles south of Hwy 20 and 1.5 miles west of Hwy 16. 321 Comment
  UCD110439  Elatine ambigua June McCaskill 1954-8-9 357 Colusa ca. 2 miles east of Princeton and 300 yards south of Glenn County line. Comment
  UCD81890  Elatine rubella Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5774 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  UCD49591  Eleocharis engelmannii S. Galen Smith; Malcolm A. Nobs 1949-9-9 1878 Colusa Rice fields 3 miles W of Williams. Comment
  UCD49598  Eleocharis engelmannii John M. Tucker 1953-8-28 2676 Colusa In rice field; 7 miles east of Arbuckle, Colusa County, California. Comment
  CHSC79049  Eleocharis macrostachya J. Marr; C. Warren, H. West 1998-7-1 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek, in vernal pool in narrow valley bottom west of ridge. 106 Comment
  UCD57106  Eleocharis macrostachya Gordon Harrington; Diana Hickson 2007-4-7 0026 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, .25 m NW of Roadkill Cafe. 427 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
  POM313049  Eleocharis obtusa var. engelmannii Malcolm A. Nobs, S. Galen Smith 1949-9-9 1878 Colusa Rice fields 3 miles west of Williams Comment
  CDA38994  Eleocharis parishii L. P. Janeway 2000-5-31 6776 Colusa Inner North Coast Ranges; At Candy Bucket Springs, on the south side of canyon of Stony Creek. Comment
  UCR198135  Eleocharis parishii Ellen Dean, Gordon Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3904 Colusa Payne Ranch (owned by BLM), lands to the southwest of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek, c. 1.0 mi southwest of parking lot 390 Comment
  UCD164140  Elymus elymoides Craig Thomsen 2003-6-1 s.n. Colusa Bear Valley. About 9 miles north of Hwy 20. Near corner of sharp turn in central Bear Valley. Comment
  SEINET10564646  Elymus elymoides A. Arthur Heller 1916-6-6 Heller 12357 Colusa Coast range on the grade about 3 miles west of Leesville in the oak and digger pine belt on open gravelly slopes. Scrub oak, Heteromeles, & Toxicodendron are common shrubs. Comment
  JEPS80181  Elymus elymoides subsp. elymoides L. R. Heckard with J. Hickman 1980-7-3 5333 Colusa just w Summit Springs (ca 10 mi w of Stonyford, sw Snow Mt., Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  CHSC94527  Elymus glaucus subsp. glaucus Lowell Ahart 2006-8-9 13136 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCR206350  Elymus glaucus var. glaucus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14743 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  JEPS76114  Elymus multisetus W. L. Jepson 1938-6-11 18989 Colusa 4 mi se Wilbur Springs; Bear Creek Comment
  JEPS80444  Elymus trachycaulus L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa slope w Summit Springs; Snow Mt. 1554 Comment
  UC641658  Elymus trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 mi w Leesville (dry bed of rivulet) Comment
  JEPS110251  Elymus trachycaulus subsp. trachycaulus Lowell Ahart 2006-6-11 12671 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
  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
  UC1051707  Emmenanthe penduliflora Helen K. Sharsmith 1953-7-1 4406 Colusa Trough Springs Ridge; Inner North Coast Ranges, Mendocino National Forest 609 Comment
  JEPS110405  Epilobium brachycarpum Lowell Ahart 2006-8-22 13218 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  UCD105289  Epilobium brachycarpum C. F. Dunshee 1922-7-28 22 Colusa Cortina. Comment
  UC73325  Epilobium campestre Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  JEPS75838  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-11 3954 Colusa along Summit Springs trail Snow Mt.; , Summit Springs trail 1737 Comment
  UCD164146  Epilobium ciliatum Craig Thomsen 1997-6-21 1931 Colusa Bear Valley. About 7 miles north of Hwy 20, southern Bear Valley. 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
  SBBG120018  Epilobium ciliatum subsp. glandulosum L. Ahart 2006-8-9 13139 Colusa N side and under the bridge across Stony Crk, just N of Stonyford 347 Comment
  JEPS110108  Epilobium densiflorum Lowell Ahart 2006-8-9 13140 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD82627  Epilobium foliosum Craig Thomsen; G. Harrington 2009-5-12 2898 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  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
  UC980843  Epilobium hallianum Kenneth Bradshaw 1953-9-9 Colusa near Board Camp Ridge (w Colusa Co.); Mendocino National Forest, Summit Valley 1676 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
  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
  UCD70303  Equisetum laevigatum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Serpentine riparian alder forests (Alnus rhombifolia) growing on alluvial sands at Stoney Creek. 420 Comment
  RSA129661  Eragrostis hypnoides H. S. Yates 1936-8-14 6139 Colusa 3 miles S. of Grimes 15 Comment
  UC188873  Eragrostis hypnoides H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CHSC115631  Eragrostis hypnoides David Isle; Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~ 100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  RSA0119053  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Northern Sacramento Valley Foothills: W side East Park Reservoir, ~0.3 mi S of boatlaunch, ~100 yds E of normal lake edge in muddy clay soil. 354 Comment
  CAS-BOT-BC479710  Eriastrum abramsii Ann Howald 2003-5-29 2345 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.1 mi N of Lodoga, near shore of reservoir 370 Comment
  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
  JEPS123252  Eriastrum tracyi David Gowen 2004-6-23 130 Colusa West of Stonyford near Fouts Springs. Toward the western edge of Davis Flat. Comment
  JEPS123253  Eriastrum tracyi David Gowen 2004-5-18 85 Colusa South of Stonyford. Along Goat Mt. Road not far from its junction with the paved road to Stonyford. Comment
  CHSC35579  Ericameria linearifolia J. P. Smith; Tom Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge road, 3.2 miles from its junction with State Route 20. Comment
  CHSC89854  Ericameria linearifolia B. Castro; L. P. Janeway 2001-4-18 1238 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On edges of low terrace just above riparian corridor paralleling dirt road, adjacent to perennial N-S-trending creek. 268 Comment
  JEPS95505  Ericameria linearifolia Vernon H. Oswald and L. Ahart 1994-3-23 6019 Colusa just W of the bridge over Sullivan Creek, S of Stonyford; Goat Mtn. Rd; T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  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
  UCD131145  Ericameria linearifolia G. F. Hrusa; K. Van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges. 950 Comment
  UCR80265  Ericameria linearifolia J. P. Smith, Thomas Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 mi. from its junction with State Route 20. Comment
  CAS-BOT-BC298294  Ericameria nauseosa var. speciosa Peter H. Raven 1959-9-11 14416 Colusa 0.5 mile S of Snow Mt 1920 Comment
  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
  JEPS75738  Erigeron petrophilus var. petrophilus L. R. Heckard 1974-9-10 3899 Colusa e slope East Peak; Snow Mt., East Peak 2103 Comment
  CAS-BOT-BC216050  Eriodictyon californicum Roxana Stinchfield 1916-6-17 278 Colusa Cemetery, College City Comment
  SEINET3245667  Eriodictyon californicum G. K. Helmkamp, E. A. Helmkamp 2009-1 14759 Colusa Inner North Coast Ranges: along CA-16, 1.8 miles north of the Yolo County Line (Glascock Mountain 7.5') 271 Comment
  UCD84550  Eriodictyon californicum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6148 Colusa Walker Ridge. Along Walker Ridge Road at Cold Spring Mountain radio tower area. 1082 Comment
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  JEPS110262  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  POM279914  Eriogonum dasyanthemum Lyman Benson 1933-6-26 4489 Colusa Abbott mine. 549 Comment
  SEINET8043934 Image available Eriogonum dasyanthemum Ann Howald 2003-1 2353 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground. 378 Comment
  UCD69100  Eriogonum dasyanthemum P. Rodriguez-Rojo 1997-7-25 Colusa Walker Ridge Rd. On disturbed serpentine soils. UTM: 10SEP4425 890 Comment
  UC201699  Eriogonum hirtiflorum Volney Rattan June, 1884 Colusa above Stony Creek Comment
  UC1051504  Eriogonum hirtiflorum Helen K. Sharsmith 1953-6-19 4288 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest, Trough 975 Comment
  UCR88380  Eriogonum luteolum var. luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  UCD73924  Eriogonum nervulosum G. Ledyard Stebbins 1966-6-6 6433 Colusa Lovelady Ridge. Comment
  CHSC76345  Eriogonum nudum var. auriculatum L. P. Janeway; B. Castro 1999-7-5 6501 Colusa Along Goat Mountain Road on north side of Little Stony Creek, 0.1 mi east of Sullivan Creek and 1.2 mi southwest of Digger Pine Campground. Road edge. 475 Comment
  IRVC29687  Eriogonum nudum var. pubiflorum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5031 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  CHSC33915  Eriogonum strictum var. greenei James Jokerst 1980-8-6 1048 Colusa North Coast Ranges. Near Snow Mountain. 484 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
  IRVC29686  Eriogonum umbellatum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5032 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  CHSC101098  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa 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
  JEPS80278  Eriogonum umbellatum var. bahiiforme L. R. Heckard, and J. Hickman 1980-9-16 5464 Colusa n slope of West Peak, Snow Mt. Snow Mt., West Peak 2042 Comment
  CHSC32219  Eriogonum umbellatum var. smallianum James Jokerst 1980-8-6 1054 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  UCD66997  Eriogonum wrightii var. trachygonum Gordon Harrington 2008-8-14 80 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 junction. Just south of the Brophy Creek - Bear Creek confluence on the east side of Bear Creek (west side of Hwy 16). North side of gravel turn-out. 210 Comment
  UCD57823  Eriophyllum lanatum Gordon Harrington 2007-4-17 34 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  CAS-BOT-BC308097  Eriophyllum lanatum var. achilleoides A. A. Heller 1916-6-6 12353 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  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
  CAS-BOT-BC308099  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6453 Colusa Stonyford Comment
  CDA15503  Eriophyllum lanatum var. achilleoides G. F. Hrusa, WTD 1998-6-19 14640 Colusa North Coast Ranges; Trough Springs ridge, immed. above (overlooking settlement) Fouts Springs. Comment
  RSA273361  Eriophyllum lanatum var. achilleoides J. P. Smith, Tom Nelson 1976-4-14 8578 Colusa Mendocino National Forest, confluence of Stony Creek and North Fork of Stony Creek 427 Comment
  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
  CAS-BOT-BC308100  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6445 Colusa Near top of Grapevine Grade between Stonyford and Sites Comment
  POM278144  Erodium botrys Lyman Benson 1933-4-16 4333 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. Comment
  UC109465  Erodium brachycarpum Brandegee Apr 1889 Colusa Colusa Junction Comment
  UC35202  Erodium cicutarium J. Burtt Davy May 1898 4281 Colusa near Willows Comment
  UC73402  Erodium macrophyllum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City, Sacramento Valley); Sacramento Valley Comment
  UC17103  Erodium moschatum J. Burtt Davy May 1898 4282 Colusa near Willows Comment
  UCR238747  Erodium moschatum George K. Helmkamp, E. A. Helmkamp 2012-2-9 18536 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC211070  Eryngium Roxana Stinchfield 1916-7-9 404 Colusa Along Sacramento River near Sycamore Comment
  UCD38844  Eryngium castrense Beecher Crampton 1958-6-26 4976 Colusa along Grieve road, just northeast Hershey R.R. siding, 5.5 miles south of College City. Comment
  CAS-BOT-BC40751  Erysimum capitatum Roxana S. Ferris 1917-4-14 576 Colusa Arbuckle-Rumsey Road. Foothills 7 miles west of Arbuckle. Comment
  UCD163847  Erysimum capitatum Craig D. Thomsen 2000-5-30 2273 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCR198118  Erysimum capitatum K. A. Bear 1978-4-9 24 Colusa 5 mi north of Hwy 20 on Bear Valley Road 401 Comment
  SEINET233343  Erysimum capitatum Kathleen R. Robson 1981-5-2 33 Colusa Mendocino National Forest ; Colusa co.: From Stonyford take Fouts Springs Road 12mi W past Fouts Springs to Letts Lake 1219 Comment
  CHSC94447  Erythranthe cardinalis Lowell Ahart 2006-8-9 13157 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC80446  Erythranthe latidens Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  CAS-BOT-BC376186  Erythranthe moschata Andrew Townesmith; Karen M. Meyer 2007-8-7 912 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from intersection with Forest Service route M10 1371 Comment
  HSC62925  Eschscholzia caespitosa Marla J. Carollo 1979-4-14 36 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20 412 Comment
  HSC72147  Eschscholzia caespitosa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9560 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  RSA794942  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17124 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CAS-BOT-BC402660  Eschscholzia caespitosa 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
  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-BC5884  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC5885  Eschscholzia californica Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CAS-BOT-BC5887  Eschscholzia californica var. crocea Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  CHSC42185  Eschscholzia lobbii S. A. Zaitz 1986-4-5 11 Colusa Ca. 0.3 mi w of jct. of Hwys 20 and 16, s side of Bear Ck, ca. 18 mi sw of Williams. 321 Comment
  CHSC70978  Euphorbia crenulata Vernon Oswald; Lowell Ahart 1998-5-7 8994 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. Roadside bank. 487 Comment
  CAS-BOT-BC366912  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 E of the junction of State Hwys. 20 and 53 558 Comment
  CHSC59969  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa In field on east side of Bear Valley Road, 10.6 miles (by road) north of junction with State Highway 20. Valley floor of Bear Valley. 381 Comment
  CHSC70979  Euphorbia spathulata Vernon Oswald; Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  JEPS94798  Euphorbia spathulata Vernon Oswald and Lowell Ahart 1998-5-7 9002 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  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
  UC1613498  Festuca Charles M. Belshaw 1937-4-25 2877 Colusa vicinity of Cooks Spring, Devils Ridge Inner Coast Range 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
  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
  UCD72474  Forestiera pubescens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek. 252 Comment
  UCR227906  Forestiera pubescens Ellen Dean, J. Alderson, N. Voegtly, Craig D. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the Southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 253 Comment
  CAS-BOT-BC63013  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12360 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  CAS-BOT-BC63014  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  CAS-BOT-BC63015  Frangula californica subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa Coast Range on the grade about 3 mi. w. of Leesville. Comment
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville Comment
  SEINET7417533 Image available Frangula californica subsp. crassifolia E. Lee 1936-12-13 2612 Colusa Stonyford-Lodoga Road Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. 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
  CHSC50803  Frankenia salina Vernon Oswald 1990-7-3 4411 Colusa Four Mile Rd ca. 4.5 mi n of Maxwell-Colusa Rd, ca. 6 mi (air) northeast of Maxwell. Along the edge of the road. 27 Comment
  CHSC88540  Frankenia salina B. Castro; Aric Lester 2003-8-20 1442 Colusa Vicinity of Sites, Antelope Valley, and Funks Creek. In mud flats at north end and along E edge of lake. 94 Comment
  CHSC79774  Fraxinus dipetala L. P. Janeway; B. Castro 2000-5-2 6697 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 256 Comment
  CAS-BOT-BC383131  Fraxinus latifolia Andrew Townesmith; Karen M. Meyer 2007-8-7 911 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from intersection with Forest Service route M10 1371 Comment
  SEINET10744717  Fraxinus latifolia Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 911 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from interesection with Forest Service route M10. T17N R8W S25. 1371 Comment
  UC1178025  Fraxinus latifolia Herbert L. Mason 1947-3-29 13156 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Creek Comment
  UCSC010486  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  CAS-BOT-BC130339  Fritillaria glauca Donald V. Hemphill 1956-5-26 s.n. Colusa 1/4 mi. south of Snow Mt. East 2103 Comment
  CAS-BOT-BC130437  Fritillaria pluriflora Arthur Menzies; Barbara Menzies 1968-3-22 s.n. Colusa Bear Valley (Between Wilbur Springs & Leesville) Comment
  SJSU8654  Fritillaria pluriflora E. O. Haas 1956-3-21 Colusa Salt Cr area 10 mi SW of Arbuckle 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
  UCD139706  Fritillaria pluriflora RYB 1965-3-14 8387 Colusa Bear Valley Road, ca. 9-10 miles south of Leesville. Comment
  UCR261614  Fritillaria pluriflora Ann Howald 2003-3-11 2277 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2.2 miles north of Lodoga 365 Comment
  UCR261676  Fritillaria pluriflora Ann Howald 2003-3-25 2283 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 1.5 miles southeast of Stonyford, just south of cattle guard at entrance to recreation area 364 Comment
  SEINET8478939  Fritillaria pluriflora W. Roderick 1967-3-20 s.n. Colusa Bear Valley. Comment
  UCD170086  Fritillaria purdyi Jack Alderson 2016-4-4 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 3600 feet (1100 m) southwest of the intersection of Highway 20 and Highway 16. 502 Comment
  UCSC010484  Fritillaria purdyi Dylan M. Neubauer, Tim Forsell 2016-3-31 599 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  HSC62768  Fritillaria purdyi M. Dean Griswold Jr. 1979-4-14 16 Colusa 1067 Comment
  HSC62800  Fritillaria purdyi Michelle Stevens 1979-4-14 32 Colusa 1067 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
  JEPS80799  Galium andrewsii subsp. andrewsii L. R. Heckard and J. C. Hickman 1981-7-30 5769 Colusa about 100 ft above on n side Trout Creek (se side of mt); Snow Mt. 1554 Comment
  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
  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
  HSC45711  Galium aparine Sheila Logan 1978-4-22 85 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80054  Galium bifolium L. R. Heckard with J. Hickman 1979-6-15 5054 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  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
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  JEPS81405  Galium grayanum L. R. Heckard and J. C. Hickman 1982-7-9 6012 Colusa just e lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  JEPS75849  Galium grayanum var. nanum L. R. Heckard 1974-9-10 3898 Colusa top of East Peak Snow Mt.; , top of East Peak 2133 Comment
  RSA170254  Galium nuttallii subsp. nuttallii J. T. Gregory 1936-3-29 1068 Colusa Climbing over oaks, SE side Cobb Mt. near top on road from Middletown Comment
  CHSC79906  Galium parisiense B. Castro; L. P. Janeway 2000-5-4 1130 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 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
  UCD82478  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2856 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD121929  Galium tricornutum Barrie Stanfield 1966-4-16 25 Colusa 4 miles north of Wilbur Springs. Comment
  CDA34117  Galium trifidum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CDA42204  Galium trifidum var. pacificum G. D. Barbe, Daryl Brown 1982-7-2 3891 Colusa Mill Valley Campground, Lower Letts Lake, Mendocino National Forest. Comment
  CDA12373  Garrya congdonii G. F. Hrusa 1996-1-2 12626 Colusa Inner North Coast Ranges; N side of Little Stony Creek, about 2 miles W of intersection of Cedar Camp Rd. and Stonyford-Lodoga Rd. Comment
  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
  SDSU7189  Garrya congdonii D. F. Howe 1962-5-19 3280 Colusa 20 miles west of Williams on #20. Comment
  UCD121087  Garrya congdonii Frederic Hrusa 1989-2-7 5806 Colusa 2 miles off Stonyford-Lodoga Rd. up road to Cedar Mtn. Comment
  UCD121092  Garrya congdonii G. Jones 1934-2-11 s.n. Colusa Above Williams. Comment
  UCD121093  Garrya congdonii D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  UCD56678  Garrya congdonii Jack Alderson 2007-3-25 14 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
  UCD58107  Garrya congdonii Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3354 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
  JEPS80143  Gayophytum diffusum subsp. diffusum L. R. Heckard with J. Hickman 1980-7-2 5304 Colusa trail from Summit Springs to Snow Mt. Peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. boundary) 1676 Comment
  JEPS75848  Gayophytum heterozygum L. R. Heckard 1974-9-11 3941 Colusa near upper crossing of Trout Creek (e of Foutch Camp); Snow Mt. 1859 Comment
  JEPS76801  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  UC1613427  Gilia Charles M. Belshaw April 1937 2869 Colusa vicinity Cook's Spring (Devil's Ridge); Inner Coast Range, Devil's Ridge Comment
  UCD63100  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4931 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley Comment
  UC1585898  Gilia capitata subsp. abrotanifolia Barbara Ertter 1989-7-1 8601 Colusa road to Goat Mt. Lookout 2.2 mi s Rt M-10 (Bear Creek-Fouts Spring Rd) (ca 12 mi wsw of Stonyford, sw side of ridge, at head of creek); S. Fk. Stony Creek 1500 Comment
  CHSC112231  Gilia capitata subsp. capitata Lowell Ahart 2013-5-1 18663 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  SD133959  Gilia capitata subsp. capitata Barbara Ertter 1989-7-1 8601 Colusa Road to Goat Mountain Lookout, 2.2 miles south of Rt. M-10 at head of South Fork Stony Crek, ca. 12 air miles westsouthwest of Stonyford. 1500 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
  UC73637  Gilia clivorum Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  POM282251  Gilia tricolor Lyman Benson 1929-3-26 1043 Colusa Wilbur Springs Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  CHSC59999  Gilia tricolor subsp. tricolor Carole Pauls 1975-4-20 1 Colusa Pasture. Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  HSC85881  Gilia tricolor subsp. tricolor Jon Schroeder 1975-4-26 27 Colusa Bear Valley Rd., 9.7 mi. N of Hwy. 20 Comment
  HSC47647  Githopsis specularioides J. P. Smith, J. O. Sawyer 1978-4-29 9789 Colusa Just W of Walker Ridge Rd. intersection with Bartlett Springs Rd. Comment
  UCD72440  Githopsis specularioides Kim E. Steiner 1978-4-29 196 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  JEPS104408  Glinus lotoides Lowell Ahart 2003-10-23 10668 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  CAS-BOT-BC434996  Glinus lotoides Roxana Stinchfield 1916-7-9 425 Colusa Along Sacramento River, Phillips Ranch near Sycamore. Comment
  JEPS127599  Glinus lotoides David Isle with Rhonda Isle 2014-9-27 2440 Colusa W side of East Park Reservoir, ca 0.3 miles S of boat launch, ca 100 yards E of normal lake edge. Comment
  JEPS75872  Glyceria elata L. R. Heckard 1974-9-9 3874 Colusa se of Foutch Camp (just ne of rock promontory); Snow Mt. 1920 Comment
  UCD72477  Glycyrrhiza lepidota Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3811 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  UCR225394  Gnaphalium californicum Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon, just south of junction with trail that leads east to Brophy Canyon and Thompson Creek 495 Comment
  RSA725016  Gnaphalium luteoalbum L. Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS80185  Gnaphalium palustre L. R. Heckard with J. Hickman 1980-7-3 5337 Colusa just w of Summit Springs (sw of Snow Mt. (ca. 10 mi w of Stonyford), Colusa-Lake County boundary) 1548 Comment
  UC71765  Gnaphalium palustre H. P. Chandler 1905-10-14 Colusa Princeton Comment
  UCD55451  Grindelia camporum Ellen Dean; Gordon Harrington 2006-10-6 3276 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
  CHSC50794  Grindelia camporum var. camporum Vernon Oswald 1990-7-30 4410 Colusa Maxwell-Colusa Rd just east of Two Mile Rd, ca. 2 mi east of Maxwell. Between road and irrigation ditch. 27 Comment
  CDA15462  Grindelia hirsutula G. F. Hrusa, WTD 1998-6-19 14598 Colusa North Coast Ranges; Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. Comment
  JEPS113893  Grindelia hirsutula L. P. Janeway 2007-6-17 9059 Colusa Inner North Coast Ranges; Along Bear Valley Road and Bear Creek near Hwy 20. 325 Comment
  UC1051714  Grindelia hirsutula Helen K. Sharsmith 1953-6-19 4264 Colusa near confluence North and Middle Fork Stoney Creek (Red Bridge Camp, North Fork Stoney Creek, Middle Fork Stoney Creek); Inner North Coast Ranges, Mendocino Natl Forest, North- Midd 548 Comment
  UC71783  Grindelia hirsutula H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD146597  Grindelia hirsutula G. F. Hrusa 1998-6-19 14598 Colusa Inner North Coast Ranges. Along Little Stony Creek, on Goat Mountain Road. Around 1.2 km west of intersection with Lodoga-Stonford Road. 400 Comment
  UCD82539  Grindelia hirsutula Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5692 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CHSC86780  Hainardia cylindrica Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  JEPS120990  Hainardia cylindrica Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18638 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD36223  Hainardia cylindrica Beecher Crampton 1953-4-29 1143 A Colusa Colusa County, 2 miles east of Maxwell. Comment
  UCD37233  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa Colusa County, 3.5 miles south of Colusa. Comment
  UCD85235  Hainardia cylindrica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  JEPS117118  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Rd., ~ 8.3 km N of jct. with Hwy. 20; ~ 1 km N of jct. w/ Indian Valley Reservoir Rd., at road-cut, both sides and adjacent slopes Comment
  JEPS94768  Harmonia hallii Vernon Oswald and Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 633 Comment
  JEPS96685  Harmonia hallii Dean W. Taylor 1998-6-23 16703 Colusa Walker Ridge, along BLM access road 929 Comment
  JEPS127589  Helenium puberulum B. Castro with Tom Boullion 2009-6-26 1795 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Road off Highway 45, just W of Ogden Bend on W bank of the Sacramento River at RM130.8. Grimes 7.5' Quad. Comment
  UCD70304  Helenium puberulum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  CDA15546  Helianthus bolanderi G. F. Hrusa 1998-10-28 14897 Colusa North Coast Ranges; along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1/2 mi. from Lodoga/Stonyford Rd. Comment
  JEPS120703  Helianthus bolanderi Lowell Ahart 2013-10-1 19071 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
  UC1299269  Helianthus bolanderi Freed W. Hoffman 1947-6-19 1617 Colusa Cook Springs North Coast Ranges, Cook Springs Comment
  UC924977  Helianthus bolanderi Annetta Carter 1951-8-26 3079 Colusa Southwest of Leesville (hills at the w side of Bear Valley); North Coast Ranges, Bear Valley 450 Comment
  RSA126696  Helianthus bolanderi Peter H. Raven, Richard Snow 1959-9-11 14424 Colusa About 2 miles south-east of Happy Camp 762 Comment
  CHSC84973  Heliotropium curassavicum Lowell Ahart 2003-10-23 10663 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC89839  Heliotropium curassavicum B. Castro; L. Janeway 2001-5-10 1250 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. At side of dirt road paralleling N-S-trending perennial creek. 381 Comment
  UCD72470  Heliotropium curassavicum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3804 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
  CHSC113041  Heliotropium curassavicum var. oculatum Lowell Ahart 2013-10-1 19096 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
  UCD70229  Heliotropium curassavicum var. oculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual plant communities on serpentine temporal vernal pools. 370 Comment
  CAS-BOT-BC306026  Hemizonia congesta subsp. clevelandii A. A. Heller 1916-6-6 12358 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  JEPS12555  Hemizonia congesta subsp. clevelandii R. F. Hoover 1938-6-11 3596 Colusa Williams-Lake Co. hwy at junction Wilbur Sprs. road Comment
  JEPS40378  Hemizonia congesta subsp. clevelandii W. L. Jepson 1938-6-11 18987 Colusa on creek 4 mi se Wilbur Sprs.; Bear Creek Comment
  UC195406  Hemizonia congesta subsp. clevelandii A. A. Heller 1916-6-6 12358 Colusa 3 mi w Leesville (on the grade); Coast Range Comment
  CHSC61405  Hemizonia congesta subsp. luzulifolia Vernon H. Oswald 1993-8-16 5808 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N end of E edge of Tract 41. Also in the south portion of the refuge. 25 Comment
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  UC73977  Hemizonia congesta subsp. luzulifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD61435  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3880 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  UCD61455  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3901 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 north of the headwaters of Eula Canyon. 339 Comment
  UCD66458  Hemizonia congesta subsp. luzulifolia Craig D. Thomsen 2000-6-7 2363 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD66696  Hemizonia congesta subsp. luzulifolia Craig D. Thomsen 2000-6-23 2384 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
  UCD72483  Hemizonia congesta subsp. luzulifolia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3817 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  UC194238  Hemizonia congesta subsp. luzulifolia H. M. Hall 1916-8-16 10268 Colusa near Williams (s to Vacaville) Comment
  UCD70251  Hemizonia congesta subsp. luzulifolia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. 450 Comment
  CHSC115621  Hemizonia congesta subsp. tracyi David Isle; Frank Pendell 2014-6-16 f 2136 Colusa North Coast Range: 2 miles W of Stonyford on Pendell Ranch. SE of Pendell home 1/4 mile; NW of Cemetery 200 yds. (GPS= Pendell home S of Fouts Sp. Rd. 50 yds.); 10S-0536687E, 4357699N). Comment
  CHSC80150  Hemizonia parryi subsp. parryi B. Castro; G. Kuenster 2000-7-19 1202 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 41 Comment
  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
  UC88271  Hesperevax caulescens B. 1889-1-1 Colusa Colusa Comment
  UCD81735  Hesperocyparis macnabiana Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5737 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  UC1212460  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4248 Colusa on State Hwy 20 ca 100 ft s origin of Wilbur Springs road; Inner North Coast Ranges, Bear Creek 320 Comment
  UC867722  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa on the grade about 3 mi w Leesville; Coast Range Comment
  UCD57715  Hesperolinon californicum Daniel Chau; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern part of ranch, ca. 2 road miles south of intersection of State Routes 20 and 16. Along unimproved road in the mouth of Craig Canyon. 313 Comment
  UCD61439  Hesperolinon californicum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3884 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile NW of parking lot in hills to the west of Bear Creek. 356 Comment
  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
  UCR212335  Hesperolinon californicum Craig D. Thomsen 2000-6-23 2382 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
  UC1212515  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14301 Colusa slope between Fouts Springs Red Bridge Public Camp; Inner North Coast Ranges, Mendocino National Forest Comment
  UCD63114  Hesperolinon disjunctum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4945 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
  UCD67057  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2752 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  CAS-BOT-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
  OBI47609  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi W of Mendocino Nat. Forest boundary on Stony Crk rd (Stonford 15' Quad 671 Comment
  RSA151821  Hesperolinon disjunctum H. L. Mason 1952-6-19 14301 Colusa Between Fouts Springs and Red Bridge Public Camp, Mendocino National Forest. Comment
  CHSC111649  Hesperolinon drymarioides David Isle; Geri Hulse-Stephens 1979-6-15 2060 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. NE of junction of Frenzel Creek with Little Stony Creek. 426 Comment
  SD8554  Hesperolinon drymarioides Katherine Curran Aug 1884 Colusa Epperson's Comment
  UC1212303  Hesperolinon drymarioides Helen K. Sharsmith 1959-5-27 4694 Colusa serpentine hillside above Cook Springs; Inner North Coast Ranges 548 Comment
  UCD110523  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs. 548 Comment
  UCR141657  Heteranthera dubia R. Yeo 1976-1 s.n. Colusa 3 mi N of Williams, Glenn-Colusa Canal irrigation district 24 Comment
  JEPS108816  Heterocodon rariflorum Lowell Ahart 2006-6-11 12678 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  UCD72451  Heteromeles arbutifolia Ellen Dean; Gordon Harrington 2006-11-10 3312 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch, along ridge trail above Cache Creek. 535 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
  CAS-BOT-BC203371  Hibiscus lasiocarpos var. occidentalis Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  CAS-BOT-BC203372  Hibiscus lasiocarpos var. occidentalis Verne Grant; Alva Grant 1946-8-6 7837 Colusa Butte Creek 1 mile north of Butte Outing Gun Club, near Colusa Comment
  CDA38628  Hibiscus trionum Ken Flagor 2012-8-28 PDR# 060 P089080 Colusa North of Maxwell; north of Lenahan Road, south of Delevan Road, west of Sutton Road, east of McDermott Road. 0 Comment
  JEPS73513  Hieracium greenei L. R. Heckard 1972-7-10 3131 Colusa overlooking and 3 mi w of Fouts Springs (woods near promontory on se corner of mountain); Snow Mt. 1828 Comment
  UCD123736  Hippuris vulgaris J. M. Tucker; L. K. Mann 1959-5-30 3528 Colusa Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout. 1219 Comment
  CAS-BOT-BC320320  Holocarpha virgata Volney Rattan 1884-6-1 s.n. Colusa Stony Creek Colusa. Coast Mts. North of San Francisco Bay Comment
  JEPS120708  Holocarpha virgata subsp. virgata Lowell Ahart 2013-10-1 19099 Colusa South end of the parking area, near strand of East Park Reservoir, about 2 air miles SE of Stonyford, about 3 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CAS-BOT-BC152577  Holodiscus discolor var. discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade about 3 miels west of Leesville Comment
  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
  HSC10153  Hordeum brachyantherum C. R. Phillips 1964-3-30 Colusa Colusa, vacant lot Comment
  UCD82472  Hordeum brachyantherum Craig Thomsen; G. Harrington 2009-5-12 2848 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC112029  Hordeum brachyantherum David Isle; Rhonda Isle, Justin Isle 1988-5-22 2098 Colusa Mendocino National Forest, Pendell Ranch, S of Fouts Springs Rd 18N01 (M10), ~2 miles W of Co. Rd. ~150 yds south of Pendel home. 384 Comment
  JEPS121772  Hordeum brachyantherum David Isle 1989-5-14 1995 Colusa COLUSA County, CA. Pendell Ranch ~ 2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road. Comment
  CHSC107983  Hordeum brachyantherum subsp. brachyantherum B. Castro; L. Janeway 2011-4-27 1864 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  UC1745700  Hordeum brachyantherum subsp. brachyantherum Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1391 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  JEPS475  Hordeum brachyantherum subsp. californicum W. L. Jepson 1938-6-9 18956 Colusa w slope of mountains between Indian Valley, Lake County and Bear Valley, Colusa County; Indian Valley, Bear Valley 579 Comment
  SEINET10598961  Hordeum californicum Roxana S. Ferris 1917-1 Ferris 518 Colusa Comment
  CHSC112265  Hordeum depressum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18637 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC53989  Hordeum jubatum Vernon H. Oswald 1991-4-21 4526 Colusa Four Mile Rd, 1.9 mi north of Maxwell Colusa Rd. Roadside ditches in area of rice fields. 27 Comment
  UCD85779  Hordeum marinum subsp. gussoneanum A. A. Beetle 1942-5-21 3273 Colusa 12 miles north of Williams. Comment
  SEINET10611039  Hordeum marinum subsp. gussoneanum LeRoy R. Abrams 1928-5-8 Abrams 12593 Colusa 2 miles south of Arbuckle. Comment
  UCR206396  Hordeum murinum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14371 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  SEINET241543 Image available Hordeum murinum subsp. glaucum Richard R. Halse 2001-3-22 5946 Colusa Williams 18 Comment
  CHSC83698  Hordeum murinum subsp. leporinum L. P. Janeway 2002-4-24 7521 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  CHSC83693  Hordeum vulgare L. P. Janeway 2002-4-24 7522 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, and Funks Creek. 103 Comment
  UCD86536  Hordeum vulgare Beecher Crampton 1962-4-17 6216 Colusa Sycamore. Comment
  RSA700357  Horkelia californica subsp. dissita L. P. Janeway, B. Castro 2001-6-3 7100 Colusa Inner N Coast Ranges, Spring at Grapevine Flat, on top of Walker Ridge 0.8km E of Baldy Mtn. Comment
  JEPS93802  Horkelia californica var. elata Vernon H. Oswald and Lowell Ahart 1998-7-15 9270 Colusa Bartlett Springs Road 1.6 mi west of Bear Valley Road 487 Comment
  SEINET10947309  Horkelia tenuiloba Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 915 Colusa Mendocino National Forest, Grindstone Ranger District. Lily Pond, off Forest Service road 17N02, 1.7 miles SW ofinteresection with Forest Service route M10. T17N R8W S24. 1264 Comment
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Aug 17 2018
  UCD66960  Hosackia crassifolia Ellen Dean; Davis Botanical Society 2008-5-31 5004 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road. 1152 Comment
  UCD57109  Hypochaeris glabra Gordon Harrington; Diana Hickson 2007-4-7 0022 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/5 to 1/2 mile W of Roadkill Cafe on old fuel break. 442 Comment
  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
  RSA0013872  Ibicella lutea J. C. Roos, L. Roos 1948-9-2 4024 Colusa West of Williams at edge of foothills. Comment
  JEPS81321  Iris fernaldii L. R. Heckard and J. C. Hickman 1982-7-6 5936 Colusa wilderness area above Summit Springs (s side of Snow Mt, near entrance and parking to Snow Mt); Snow Mt. 1584 Comment
  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
  JEPS94211  Iris macrosiphon Vernon Oswald and Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Road 2.2 mi w of Bear Valley Road (0.7 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  RSA256676  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Road, ca. 0.7 mile from junction with Little Indian Valley Road 854 Comment
  UCD163714  Iva axillaris Craig Thomsen 1999-5-10 2007 Colusa Colusa County. In canyon between Wilbur Springs Bridge and Bear Valley. About 4 miles north of Hwy 20. Comment
  CHSC79769  Juglans californica var. hindsii L. P. Janeway; Caroline Warren 2000-4-6 6660 Colusa Vicinity of Lurline Creek and Standard Road. 51 Comment
  RSA30188  Juglans hindsii E. K. Balls, Percy C. Everett 1953-10-14 18670 Colusa Hwy 20, 10.5 miles SW of Williams on road to Clear Lake 183 Comment
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Jun 18 2011
  CHSC84195  Juncus balticus Lowell Ahart 2003-7-14 10384 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  UCD65641  Juncus balticus Craig D. Thomsen 2000-4-28 2178 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCR212366  Juncus balticus Craig D. Thomsen 2000-4-28 2178 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
  CHSC107173  Juncus balticus subsp. ater L. P. Janeway; B. Castro 2011-5-19 10284 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Eastern of the 2 Juncus patches at the south edge of the marsh, just above high water line. 50 Comment
  HSC62947  Juncus balticus subsp. ater Marla J. Carollo 1979-4-14 32 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  JEPS80753  Juncus bolanderi L. R. Heckard and J. C. Hickman 1981-7-29 5718 Colusa s side Snow Mt. (around Summit Springs); , Summit Springs 1554 Comment
  CHSC112219  Juncus bufonius Lowell Ahart 2013-5-1 18691 Colusa Inner North Coast Range. In a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD81220  Juncus bufonius Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5557 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. Canyons south of Destanella Flat. 438 Comment
  CHSC107974  Juncus bufonius var. bufonius B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1859 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  CHSC86032  Juncus bufonius var. bufonius Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. 137 Comment
  JEPS81343  Juncus hemiendytus L. R. Heckard and J. C. Hickman 1982-7-7 5956 Colusa s of (above) Milk Ranch; Snow Mt. 1950 Comment
  JEPS75732  Juncus howellii L. R. Heckard 1974-9-9 3871 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  JEPS73494  Juncus laccatus L. R. Heckard 1972-7-10 3107 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 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
  UCD82125  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5654 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  HSC100768  Juncus usitatus Lowell Ahart 2007-7-7 14258 Colusa S side of the Gridley-Colusa Hwy., ~1 1/4 mi. E of River Rd. and 17 mi. W of Gridley. 20 Comment
  CHSC111646  Juncus xiphioides David Isle; Justin Isle 1988-5-25 2092 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. S of Potatoe Hill Rd 17N12 at spring ~1 mile SW of Fouts Springs in the 1987 Fouts Fire secondary fireline rehab. 829 Comment
  SBBG119881  Juncus xiphioides L. Ahart 2006-8-9 13145 Colusa N side and just E of the bridge across Stony Crk, just N of Stonyford 347 Comment
  UC842993  Juncus xiphioides A. A. Heller 1916-6-9 12389 Colusa about 8 mi w Williams; Coast Range Comment
  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
  CAS-BOT-BC80913  Juniperus californica Roxana S. Ferris 1926-4-23 6456 Colusa 4 miles from Stanford on the Leesville Road Comment
  CHSC43541  Juniperus californica Lowell Ahart 1976-2-14 1005 Colusa About 3 miles west of Sites. 365 Comment
  UC1221795  Juniperus californica Beecher Crampton 1958-5-19 4804 Colusa 1.3 mi s of Lodoga Comment
  UCD70298  Juniperus californica D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Open California juniper woodland (Juniperus californica). 420 Comment
  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
  CAS-BOT-BC123283  Krynitzkia rostellata M. K. Curran 1884-5-1 s.n. Colusa Leesville (wrote Leesburg, Lake(?) Co. on label; later corrected to Leesville Comment
  JEPS80852  Lactuca saligna L. R. Heckard and J. Hickman 1980-9-15 5432 A Colusa n of Summit Springs (n side of road; Lake-Colusa County boundary); Snow Mt. 1524 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
  OBI15966  Lagophylla minor Robert F. Hoover 1968-5-27 11098 Colusa Bear Crk cyn N of hwy 20 (near Wilbur Springs) Comment
  RSA724937  Lagophylla minor L. 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
  UC762560  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge between Venado and Leesville Comment
  UCD163223  Lagophylla minor Craig D. Thomsen 2000-4-12 2155 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD57827  Lagophylla minor Gordon Harrington 2007-4-17 36 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 567 Comment
  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
  CAS-BOT-BC341397  Lagophylla minor A. A. Heller 1940-5-6 15578 Colusa On State Highway #20, 2 miles west of the junction with Highway #16 Comment
  UCD82369  Lagophylla minor Robin McMaster 1973-4-15 341 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  UCSB6616  Lagophylla minor Keator, Glenn 1958-6-17 Colusa Near roads at Houghs Springs, in hill country Comment
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May 24 2013
  UCD133623  Lagophylla ramosissima P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. Comment
  UCD61466  Lagophylla ramosissima Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3912 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  CAS-BOT-BC341471  Lagophylla ramosissima Bruce G. Baldwin 1985-6-1 484 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CAS-BOT-BC290604  Lasthenia Peter Rubtzoff 1978-5-14 9167 Colusa Bear Valley Road, ca. 4-5 miles south of junction of the road to Fort Ross State Historic Park. Bartlett Springs Road. Comment
  CHSC77734  Lasthenia californica B. Castro 1999-4-12 Colusa About 9 air miles NW of Maxwell, vicinity of Peterson Rd and Logan Ridge. 100 Comment
  HSC72162  Lasthenia californica J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9537 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  POM288355  Lasthenia californica Lyman Benson 1933-4-16 4329 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  CAS-BOT-BC324484  Lasthenia ferrisiae Alice Eastwood 1921-4-11 10232 Colusa Colusa Comment
  UC725317  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 mi n Maxwell Comment
  CHSC28855  Lasthenia fremontii Joann Lacey 1979-3-31 11 Colusa Ca. 1 mi w of Williams, n side of Hwy 20. 25 Comment
  UCD18839  Lasthenia fremontii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 146 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  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
  HSC83436  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi N of jct with State Hwy 20 366 Comment
  HSC94246  Lasthenia glaberrima D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 5 Colusa On Bear Valley Rd., 1.2 mi. S of the junction with Brim Rd. 415 Comment
  UCR47942  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa W side of Ber Valley Rd., 11 mi north of jct with State Hwy 20 396 Comment
  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
  UCD163320  Lasthenia glabrata Craig D. Thomsen 1997-4-20 1919 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  CAS-BOT-BC352770  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi. NW of Rumsey 304 Comment
  UC583164  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi nw Rumsey 304 Comment
  UCR247331  Lasthenia glabrata subsp. glabrata Peter Rubtzoff 1978-5-14 9167 Colusa Inner North Coast Range, Bear Valley Road, c. 4-5 miles south of junction of the road to Ft. Ross State Historic Park, Bartlett Springs Road 405 Comment
  CAS-BOT-BC353439  Lasthenia glabrata subsp. glabrata Ella Dales Cantelow 1936-4-11 1151 Colusa Jct. William Hy, Bear Creek Canyon Comment
  UCD33938  Lasthenia gracilis Beecher Crampton 1958-4-21 9169 Colusa Colusa County, 3.5 miles N.W. of Lodoga by road. 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
  CHSC53935  Lasthenia minor Vernon H. Oswald 1991-4-21 4527 Colusa Four Mile Rd, 3.1 mi south of Norman Rd, west-southwest of Princeton. Along the edge of the road. 27 Comment
  HSC95475  Lathyrus vestitus subsp. vestitus A. Skelly, B. Bletcher, G. McCabe 1996-3-30 10 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  CHSC48511  Lathyrus vestitus var. vestitus Vernon Oswald 1986-5-12 2009 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. 487 Comment
  CAS-BOT-BC323887  Layia chrysanthemoides Alice Eastwood 1922-4-24 11191 Colusa Road between Princeton & Norman. Comment
  CHSC82611  Layia chrysanthemoides Tara Morgan 2002-4-6 16 Colusa Found in Bear Valley located west of Highway 5 and north of Highway 20 within pastures. 385 Comment
  HSC86895  Layia chrysanthemoides Anthony J. Desch, Bryon Cariss 1988-4-17 39 Colusa 1.3 mi. S on Bear Valley Rd. from the corner of Brim Rd. and Bear Valley Rd. Comment
  HSC87057  Layia chrysanthemoides Pat Daly, Rudy Galindo 1988-4-17 61 Colusa 5.2 mi. S on Bear Valley Rd. 390 Comment
  HSC92628  Layia chrysanthemoides Eric B. Peterson, Thomas Ward, Matt Foruria 1995-4-1 54 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  UC638650  Layia chrysanthemoides Ethel Crum 1938-5-8 2038 Colusa four mi s of Leesville; Bear Valley 426 Comment
  SEINET5712162  Layia chrysanthemoides Clinton C. Shock 1980-1 64 Colusa Bear Valley, ca. 12 miles north of State Hwy 20; west edge of valley.; Bear Valley 390 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
  UCR37887  Layia chrysanthemoides subsp. chrysanthemoides C. G. Phillips, L. Cole, SA. Haultain, K. B. Barrows 1984-4-29 32 Colusa Bear Valley road Comment
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  JEPS74816  Layia platyglossa L. R. Heckard, T. I. Chuang, and R. Bacigalupi 1975-5-7 4025 Colusa in center of Bear Valley meadows; Leesville Comment
  UCD163693  Layia platyglossa Craig Thomsen 1999-4-27 1995 Colusa Bear Valley. About 6 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC85860  Layia platyglossa Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Along dirt road running N-S through Bear Valley Comment
  UC638682  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa 4 mi ne of Rumsey; Comanche Hills 254 Comment
  UC75946  Layia septentrionalis Miss M. Alice King 1905-1-1 Colusa near College City Comment
  UC761855  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey-Arbuckle road Comment
  UCR261646  Layia septentrionalis Ann Howald 2003-4-23 2313 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 1.1 mi north of intersection with East Ruby King Road 403 Comment
  UCR261647  Layia septentrionalis Ann Howald 2003-4-23 2309 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  UC1100313  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway, e bank of Sacramento River, Butte Sink); Sacramento River, Butte Sink Comment
  CAS-BOT-BC527263  Lemna gibba A. A. Heller; H. E. Brown 1902-5-19 5571 Colusa Near Colusa Comment
  CAS-BOT-BC527264  Lemna gibba A. A. Heller; H. E. Brown 1902-5-19 5571 Colusa Near Colusa Comment
  CHSC46882  Lemna trisulca Vernon Oswald 1989-9-12 4005 Colusa Lily Pond near Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. In pool at the outlet of the 'Lily Pond. 1341 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
  POM312464  Lemna trisulca C. Ritchie Bell 1951-6-13 1167 Colusa Lake below Letts Meadow on road from Bear Creek to Foutes Spring 915 Comment
  RSA141287  Lemna trisulca J. M. Tucker, L. K. Mann, John Tothill 1959-5-30 3532 Colusa Small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley, and ca. 4 miles, airline, north of Goat Mountain Lookout 1220 Comment
  JEPS95512  Lepidium dictyotum var. dictyotum Vernon H. Oswald and L. Ahart 1994-4-6 6074 Colusa T16N R7W SW1/4 Sec. 11, 1800 ft, Chaparral. Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford 548 Comment
  HSC72170  Lepidium lasiocarpum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9542 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UC398784  Lepidium latipes Brandegee Apr 1889 Colusa Colusa Junction Comment
  CAS-BOT-BC89761  Lepidium latipes Brandegee s.n. Colusa Unspecified. Comment
  CAS-BOT-BC12710  Lepidium oblongum Roxana S. Ferris 1917-4-19 695 Colusa Sycamore Slough. Roadside. Comment
  CHSC79002  Lepidium strictum J. Marr; C. Warren, H. West, N. Wight 1998-6-11 Colusa West of Maxwell, vicinity of Logan Ridge and Funks Creek. 114 Comment
  RSA799180  Lepidium strictum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17134 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 2.0 mi southeast of Sites. 85 Comment
  UC1100305  Leptochloa fascicularis Herbert L. Mason and Verne Grant 1946-8-6 12962 Colusa pond on Colusa-Marysville Hwy 4 mi s Colusa (w side of Sacramento River) Comment
  UC767153  Leptochloa fascicularis R. F. Hoover 1936-7-31 1590 Colusa Maxwell Comment
  CHSC61255  Leptochloa fusca subsp. fascicularis K. R. Stern 1980-6-30 6648 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD63674  Leptochloa fusca subsp. fascicularis Hursh 1919-11-12 X 3341 Colusa Williams. Comment
  UCD82365  Leptosiphon androsaceus Robin McMaster 1973-4-15 335 Colusa 1/2 mi towards Bartlett Springs from Bear Valley Road. Comment
  HSC83422  Leptosiphon bicolor C. Pauls 1975-4-20 8 Colusa Bear Valley Rd., 8.7 mi. N of Hwy. 20 Comment
  UCD162985  Leptosiphon bicolor Craig D. Thomsen 2002-4-4 2584 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD58114  Leptosiphon bicolor Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3381 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. Along unimproved road that goes south from Hwy. 20, ca. 2.3 road miles W of junction with Hwy. 16. Unnamed valley with old building called 'Roadkill Cafe. 414 Comment
  RSA137124  Leptosiphon bicolor Verne Grant 1960-4-10 10187 Colusa Foothills west of Williams on hwy 20. 396 Comment
  UCD14330  Leptosiphon bicolor Kathi A. Zurakowski 1984-4-21 Colusa Colusa Co.; Bear Valley, 3.2 miles north of Wilbur Springs turnoff, west of road; 381 Comment
  UCD14428  Leptosiphon bicolor R. M. Rhode 1984-4-21 s.n. Colusa Colusa Co.; Bear Valley, 10 miles north of intersection of Highways 16 and 20; 426 Comment
  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
  CHSC61230  Leptosiphon ciliatus Siegel 1977-4-16 8 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. 143 Comment
  POM174562  Leptosiphon ciliatus Roxana S. Ferris 1926-4-23 6430 Colusa Near summit on grade. Williams- Stonyford Road. 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
  HSC47564  Leptosiphon ciliatus J. P. Smith, J. O. Sawyer 1978-4-29 9796 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  HSC85857  Leptosiphon ciliatus Tim Tilghman, Rob Marheine, Bruce Delgado 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  RSA589922  Leptosiphon ciliatus Michael A. Vincent, Robert M. Rhode 1996-3-30 7291 Colusa Along Bear Valley Rd., 2.5 mi N jct. Wilbur Springs Rd. Comment
  CHSC1269  Leptosiphon parviflorus V. Holt 1935-5-12 Colusa Stonyford. Comment
  CHSC79792  Leptosiphon parviflorus L. P. Janeway; B. Castro 2000-5-4 6703 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD15428  Leptosiphon parviflorus Margit Sands 1985-4-13 32 Colusa in Bear Valley, 7.4 miles north of Wilbur Hot Springs rd., a quarter of a mile form the west side of the road; 396 Comment
Read comments
Apr 18 2009
  CHSC32205  Lesquerella occidentalis subsp. occidentalis James Jokerst 1980-8-7 1067 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UC1051736  Lesquerella occidentalis subsp. occidentalis Helen K. Sharsmith 1953-6-20 4291 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  UCD70252  Lessingia micradenia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  CAS-BOT-BC341801  Lessingia nemaclada Peter H. Raven; R. Snow 1959-9-11 14425 Colusa About 2 miles south-east of Happy Camp 762 Comment
  CAS-BOT-BC341802  Lessingia nemaclada Walter Knight; Irja Knight 1963-9-23 113 Colusa Between Leesville and Wilbur Springs Comment
  JEPS24542  Lessingia nemaclada Peter H. Raven and R. Snow 1959-9-11 14425 Colusa about 2 mi se Happy 762 Comment
  CAS-BOT-BC123028  Lessingia ramulosa M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  RSA700360  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  UC88009  Lessingia ramulosa J. W. Blankinship Colusa near Epperson's Comment
  JEPS43214  Lewisia rediviva W. L. Jepson 1932-5-7 16280 Colusa Lodoga 457 Comment
  UCD56657  Lewisia rediviva Sam Bledsoe 2007-3-25 5 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20, ca. 500 ft south of road. 569 Comment
  UCD56681  Lewisia rediviva Roger Willmarth 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 563 Comment
  UCD81857  Lewisia rediviva Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5741 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
  JEPS76124  Leymus triticoides W. L. Jepson 1938-6-11 18990 Colusa on creek 4 mi se Wilbur Springs; Bear Creek Comment
  UCD163658  Leymus triticoides Craig Thomsen 1998-6-10 1956 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  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
  JEPS80768  Lilium pardalinum L. R. Heckard and J. C. Hickman 1981-7-30 5736 Colusa along Trout Creek Trail, se side of Snow Mountain Snow Mountain; , Trout Creek Trail 1676 Comment
  JEPS96000  Lilium pardalinum subsp. pardalinum Vernon H. Oswald and L. Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 30, ca. 1400 ft, chaparral, serpentine substrate 426 Comment
  UC71645  Limnanthes douglasii subsp. rosea Miss Alice King 1905-1 Colusa College City Comment
  UC1586056  Limosella acaulis Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8874 Colusa se end East Park Reservoir (n of Lodoga); se end of East Park Reservoir 365 Comment
  UC971715  Linanthus bolanderi Herbert L. Mason 1941-4-5 12404 Colusa 3 mi s Stonyford Comment
  UCD167523  Linanthus dichotomus subsp. meridianus James Neilson Unknown s.n. Colusa 2.5 miles south of Lodoga. (Exact location unknown. Coordinates estimated by label maker.) 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
  JEPS2613  Linanthus rattanii V. Rattan Colusa summit above Fout's Springs (summit on trail to Fout's Springs from Stony Valley); ; Above Fout's Springs, Colusa Co. Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  JEPS15252  Lithophragma affine Rimo Bacigalupi with G. Ledyard Stebbins and Peter Kamb 1950-4-16 3111 Colusa 4 mi s Ladoga (and 6 mi nnw of Leesville, along Little Indian Creek); Indian Valley, Little Indian Creek 396 Comment
  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
  CDA34090  Lithophragma affine P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCR261726  Lithophragma parviflorum var. parviflorum Ann Howald 2003-5-26 2342 A Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 0.2 mi north of intersection with East Ruby King Road 425 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
  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
  SBBG128772  Logfia filaginoides L. Ahart 2013-5-1 18678 Colusa N 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
  UCD57556  Lolium multiflorum Andrew Pedersen; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  CAS-BOT-BC283547  Lolium multiflorum Roxana Stinchfield 1916-6-17 279 Colusa Road to Tule near College City Comment
  UC1409830  Lomatium ciliolatum var. ciliolatum James E. Eckenwalder and Dale E. Johnson 1974-6-2 358 Colusa below summit of East Peak Snow Mt. (on divide between East & West Peaks); , East Peak Comment
  CDA12080  Lomatium ciliolatum var. hooveri G. F. Hrusa 1989-4-8 5913 Colusa North Coast Biodiversity Arena; Bartlett Springs road immediately to W of Bear Valley, lower slopes of Walker Ridge. Comment
  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
  UC903739  Lomatium hooveri Milo S. Baker 1947-4-6 11646 Colusa near Hwy. 20 ca. 1 mi. e. Lake-Colusa Co. line Comment
  UCD110811  Lomatium hooveri Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD162978  Lomatium hooveri Jack Major 1963-5-4 s.n. Colusa West of Bear Valley on Bartlett Springs road. (Exact location unknown. Coordinates estimated by label maker.) 609 Comment
  UCD150867  Lomatium hooveri Clinton C. Shock 1980-5-3 73 Colusa Walker Ridge, 14.6 miles north of State Highway 20, at intersection with road to Bear Valley. 670 Comment
  CAS-BOT-BC230056  Lomatium macrocarpum Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5683 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 843 Comment
  CHSC116064  Lomatium macrocarpum Richard R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 miles south of Logoda; Indian Valley. 425 Comment
  HSC72294  Lomatium macrocarpum J. P. Smith, Thomas Nelson, Jane P. Nelson 1978-4-2 9545 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD127696  Lomatium macrocarpum G. L. Stebbins Jr. 1962-5-6 6025 Colusa along Highway No. 20, Bear Creek, between Williams and Lower Lake, south of Wilbur Springs. 457 Comment
  UCD58110  Lomatium macrocarpum Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3370 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. South of Destanella. 548 Comment
  SEINET196147  Lomatium marginatum Robert F. Hoover 1941-5-2 4987 Colusa Just east of lake Coutny line on Williams Clear Lake highway Comment
  CHSC77720  Lomatium marginatum var. purpureum B. Castro; M. A. Griggs, L. P. Janeway, B. Hendrickson 1999-4-12 875 Colusa About 8 miles NW of Maxwell, vicinity of Peterson Rd and Logan Ridge. 134 Comment
  JEPS17580  Lomatium utriculatum W. L. Jepson 1932-5-8 16281 Colusa w. Colusa Co., Stonyford Comment
  SEINET11587934  Lomatium utriculatum Unknown 2009-3-11 14374 Colusa Williams Comment
  UC1053478  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UCD163304  Lomatium utriculatum Craig D. Thomsen 1997-4-7 1895 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCR243135  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa Inner North Coast Range, 9 miles north of Hwy 20 on Bear Valley Road 405 Comment
  HSC47643  Lomatium utriculatum J. P. Smith, J. O. Sawyer 1978-4-29 9795 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  SEINET13944679 Image available Lomatium utriculatum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley 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
  UC1299566  Lonicera interrupta Freed W. Hoffman 1948-6-29 2505 Colusa crossing at North Fork Stony Creek North Coast Ranges Comment
  UCD67120  Lonicera involucrata Ellen Dean; Davis Botanical Society 2008-5-31 5053 Colusa west of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs, east side of road. Comment
  JEPS80249  Lonicera involucrata var. ledebourii L. R. Heckard, and J. Hickman 1980-9-15 5428 Colusa slopes below Summit Springs (Lake-Colusa County boundary); Snow Mt. 1524 Comment
  UC1299560  Lonicera involucrata var. ledebourii Freed W. Hoffman 1948-6-27 2493 Colusa 8.6 mi sw Fouts Spring; North Coast Ranges, Upper Letts Valley 1310 Comment
  CAS-BOT-BC198625  Lotus Roxana S. Ferris 1917-4-14 577 Colusa Foothills 7 miles west of Arbuckle, Arbuckle-Rumsey Road. Comment
  UCR228657  Lotus crassifolius Ellen Dean, Davis Botanical Society 2008-5-31 5004 Colusa West of Hwy I-5 at Maxwell, east slope of Goat Mountain along Goat Mountain Road 1152 Comment
  UCR257975  Lotus grandiflorus Ellen Dean, Craig D. Thomsen, Gordon Harrington, R. Wilmarth, R. Wenk 2010-6-2 6045 Colusa Walker Ridge, along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 770 Comment
  JEPS60197  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2231 Colusa 1.5 mi ne Fouts Springs (near junction of Stonyford-Fout Springs road and Trough Spring Ridge road) 670 Comment
  RSA516411  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. Comment
  HSC45721  Lotus humistratus M. Alcasas 1978-4-22 45 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  RSA424761  Lotus humistratus Aaron Liston, M. Blumler 1987-4-26 668 -6 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  UCR206894  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14363 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  JEPS110414  Lotus purshianus var. purshianus Lowell Ahart 2006-8-9 13112 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  RSA746969  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14242 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UC725836  Lotus purshianus var. purshianus A. A. Heller 1919-6-8 13243 Colusa Ladoga Comment
  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
  UCD65956  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 68 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. 12 Comment
  UC726672  Lupinus A. A. Heller 1940-4-21 15542 Colusa along U.S. Highway #99W, 2 mi s Williams Comment
  JEPS81378  Lupinus adsurgens L. R. Heckard and J. C. Hickman 1982-7-8 5989 Colusa 1/4 mi sw East Peak (Snow Mt.); , sw of East Peak 2087 Comment
  RSA590140  Lupinus albifrons var. albifrons M. A. Vincent 1996-3-30 7277 Colusa Along Bear Valley Rd. above Bear Creek, 1.4 mi. S jct Wilbur Springs Rd. 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
  CAS-BOT-BC196036  Lupinus albifrons var. collinus A. Burgard; J. Goldsmith; J. Kalt 1996-5-4 78 Colusa 2.4 miles west of Bear Valley Rd. 12.4 miles on Walker Ridge Rd. from Hwy 20 to Brim Rd. 57 miles east of Hwy. 101 on Hwy. 20 524 Comment
  JEPS80459  Lupinus albifrons var. collinus Alice Q. Howard 1972-7-10 14 Colusa between Dark Hollow and Paradise Creeks; between Dark Hollow and Paradise Creeks 1402 Comment
  UCD67041  Lupinus albifrons var. collinus Ellen Dean; Davis Botanical Society 2008-5-31 5021 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCR212293  Lupinus albifrons var. collinus Ellen Dean, Davis Botanical Society 2008-5-31 5010 Colusa West of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, between Cedar Grove Campground and the summit, near crossing of tributary of Little Stoney Creek 1309 Comment
  NY15769  Lupinus albipilosus A. A. Heller 1940-4-21 15543 Colusa Border of a field along U. S. Highway #99W, 2 miles south of Williams, in the Lower Sonoran LIfe Zone. Comment
  CHSC27856  Lupinus bicolor Phil Blumert 1978-3-28 18 Colusa Ca. 0.3 mi w of jct of hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  HSC72138  Lupinus bicolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9570 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD163686  Lupinus bicolor Craig Thomsen 1999-4-15 1988 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCR206360  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley, on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 Comment
  UCD73530  Lupinus bicolor John Anderson 2007-5-1 s. n. Colusa Bear Valley. Comment
  POM278280  Lupinus bicolor subsp. tridentatus Lyman D. Benson 1935-3-27 6329 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  HSC45663  Lupinus densiflorus var. aureus Howee Barban 1978-4-22 16 Colusa Bear Valley Rd., 1.5 mi. from its junction with State Route 20 412 Comment
  POM20193  Lupinus densiflorus var. aureus Roxana S. Ferris 1917-4-14 584 Colusa 7 miles west of Arbuckle, along Sand Creek. Arbuckle-Ramsey Road. Comment
  HSC36907  Lupinus densiflorus var. aureus John Rehling, Robert M. Specht 1976-3-26 172 Colusa 2 1/2 mi. E of Leesville on the Leesville Rd. to Williams Comment
  SEINET10485227  Lupinus densiflorus var. aureus Clemens 1977-4-16 CLEMENS 17 Colusa Moderate population, salt creek canyon, n side of salt creek, hwy 20, 10 mi w-sw of williams. Wilbur springs quad, t.15n, r.4w, sec.32, 15 ft e central border. Open bank along roadside. 143 Comment
  SEINET10838182  Lupinus densiflorus var. aureus J. P. Kroessig 1977-4-16 Kroessig 9 Colusa Corolla yellow-white, pleasantly scented. Large population ca. 0.3 Mi. Sw of Jct of hwys 20 and 16, s side of bear creek, ca 18 mi. Sw of williams. Wilbur Springs quad, 15'. S central border of sec 36, t14n, r5w. Open foothill Woodlands. 322 Comment
  SEINET12161687  Lupinus densiflorus var. aureus Unknown 1977-1 20 Colusa ca 10 m N of Salt Creek, Salt Canyon, Hwy 20, 16kmWSW of Williams. WilburSpringsQuad. seebelow 143 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
  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
  UC710400  Lupinus formosus var. robustus C. P. Smith 1946-4-26 46225 Colusa Hiway 99w about 2 mi w College City (Arbuckle - 1.5 mi s); Arbuckle Comment
  UCD107778  Lupinus formosus var. robustus D. E. Breedlove 1963-4-20 4624 Colusa 11 miles W of Arbuckle on the Rumsey-Arbuckle Road. 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
  CHSC84200  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the east and west side of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. 379 Comment
  JEPS81270  Lupinus luteolus L. R. Heckard and J. C. Hickman 1982-7-5 5878 Colusa slope below (s) Summit Springs (s side of Snow Mt.); , s of Summit Springs 1500 Comment
  JEPS95253  Lupinus luteolus Steve Edwards 1995-8-19 Colusa Bear Valley Road, just S of Bear Valley proper. Also common this year on floor of Bear Valley propers. Bear Valley Comment
  JEPS98385  Lupinus luteolus Vernon H. Oswald 2000-8-21 9950 Colusa Bear Valley near the junction of Bear Valley and Brim roads 411 Comment
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  UCD81894  Lupinus luteolus Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5778 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Along Bear Creek opposite Cowboy Camp parking lot, on W side of creek. 314 Comment
  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
  UC1543161  Lupinus microcarpus var. densiflorus Charlotte G. Nast 1936-4-17 137 Colusa Williams to Lake Co. Road Comment
  UC614570  Lupinus microcarpus var. densiflorus L. Constance 1938-4-22 2147 Colusa 11 mi ne Lake-Colusa line (above Salt Creek); Inner North Coast Ranges, above Salt Creek 152 Comment
  UC726766  Lupinus microcarpus var. densiflorus A. A. Heller 1940-5-6 15576 Colusa on steep clay banks along State Hwy #20 about 3 mi e junction with Highway #16 Comment
  UCR206292  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14736 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  OBI56805  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  OBI56806  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  CHSC29255  Lupinus microcarpus var. microcarpus Gary McGrath 1977-4-16 9 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 10 mi wsw of Williams. 143 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
  CHSC27819  Lupinus succulentus Laurie L. Pate 1978-4-8 87 Colusa 5.1 mi w of Walker Ridge Road, Hwy 20. 457 Comment
  CHSC77930  Lupinus succulentus Jean Witzman; Beth Hendrickson 1999-4-19 Colusa Vicinity of Logan Ridge and Golden Gate. 152 Comment
  HSC45690  Lupinus succulentus Patricia Shesgreen 1978-4-22 28 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  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
  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
  CDA5761  Lycium barbarum G. D. Barbe 1975-10-23 2091 Colusa 7th and Market Streets, Colusa. 0 Comment
  RSA74314  Lycopus americanus Milo S. Baker 1946-9-5 11628 Colusa Along Hwy in water ditch betw Colusa & Williams. 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
  CHSC106708  Lythrum tribracteatum Barbara Ertter; Elizabeth Neese, laure Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga, narrow strand on shaly substrate. 365 Comment
  CHSC107979  Lythrum tribracteatum B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1884 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  JEPS107096  Lythrum tribracteatum Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga Comment
  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
  UCD102948  Lythrum tribracteatum H. L. Mason 1945-7-11 12645 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. 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
  HSC5967  Madia citriodora D. R. Junell 1965-4-18 24 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  UCD162973  Madia elegans Jack Major 1963-5-4 s.n. Colusa Bear Valley in grassland at south end of the valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  CHSC94320  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CHSC94407  Madia elegans subsp. densifolia Lowell Ahart 2006-8-22 13229 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  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
  UC638697  Madia exigua Ethel Crum 1938-5-7 2008 Colusa 4.2 mi n Rumsey (Comanche Hills, summit of ridge); Inner North Coast Range 254 Comment
  UCD66866  Madia exigua Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5069 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
  CHSC89612  Madia gracilis B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1446 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 167 Comment
  UCR206383  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14753 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  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
  CHSC110854  Malacothamnus fremontii David Isle; Rhonda Isle 2013-6-23 2044 Colusa Just E of Maxwell Grade Summit and pass; hot-burned S aspect slope N of Sites Lodoga Road (at Grapevine Pass). In July 2012 Sites Fire Area. 562 Comment
  UCD81897  Malacothamnus fremontii G. Harrington 2009-6-30 82 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. W side of Bear Creek on flat area above a steep bluff overlooking the creek. 233 Comment
  CHSC59692  Malacothrix californica Janet Delight 1978-4-8 5 Colusa Ca. 0.3 mi. w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  CHSC79469  Malacothrix clevelandii B. Castro; L. P. Janeway 2000-5-2 1116 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  JEPS36621  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek Comment
  CAS-BOT-BC347387  Malacothrix floccifera unspecified 1936-4-11 s.n. Colusa Bear Creek Canyon Comment
  CHSC27632  Malacothrix floccifera Timothy Spira; Robert Schlising 1978-5-13 3237 Colusa Just E of Lake County line, along Hwy 20. Comment
  JEPS120980  Malacothrix floccifera Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18627 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UC1053472  Malacothrix floccifera Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3185 Colusa just w Bear Valley (just w of base of the grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  CAS-BOT-BC347388  Malacothrix floccifera Volney Rattan 1884-1-1 s.n. Colusa Unspecified Comment
  RSA135416  Malacothrix floccifera Volney Rattan 1884-1 s.n. Colusa [no location specified] Comment
  JEPS113503  Malvella leprosa Lowell Ahart 2007-7-7 14261 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley 20 Comment
  RSA140617  Malvella leprosa John H. Thomas 1960-8-30 8863 Colusa About 5 miles NW of College City along road to Sycamore. Comment
  RSA726801  Malvella leprosa L. Ahart 2007-7-7 14261 Colusa About 1.25 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UC18824  Malvella leprosa Robert Cosmer 1900-8-27 Colusa Colusa Comment
  UCD63127  Malvella leprosa Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4957 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Destinella Flat on the south side of Hwy 20, just east of the Lake County line, ca 3.4 rd miles west of junction with Hwy 16. 551 Comment
  HSC72144  Marah fabacea J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9576 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  SEINET11990999  Marah oregana R. A. DeMartile 1983-1 106 Colusa Goat Mountain Rd 914 Comment
  CHSC46939  Marah watsonii Glenn Keator 1966-4-24 Colusa Junction of Rail Canyon Road and Sites-Lodoga Road. Comment
  UC903736  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa less than 1 mi e Colusa-Lake Co. boundary (along Hiway 20) Comment
  POM174574  Marah watsonii Roxana S. Ferris 1926-4-23 6593 Colusa On Grapevine Grade; Stonyford-Sites Road. Comment
  RSA63685  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa 1 mile E of Lake - Colusa boundary along hwy 20, Serpentine area. 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
  JEPS374  Marsilea vestita subsp. vestita W. L. Jepson 1934-7-28 16751 Colusa Williams Comment
  CAS-BOT-BC348045  Matricaria discoidea Roxana S. Ferris 1917-4-19 693 Colusa Sycamore Slough Comment
  UC89518  Matricaria discoidea T. S. Brandegee April 1889 Colusa Colusa Junction Comment
  UCD107748  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Slopes of Little Stoney Creek, Mendocino National Forest. Inner north coast ranges. 762 Comment
  CHSC112216  Medicago polymorpha Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18651 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
  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
  UCD56908  Medicago polymorpha Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3511 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCR233452  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-4-1 17118 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  POM276582  Medicago polymorpha Lyman D. Benson 1933-4-16 4337 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 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
  CDA14215  Melica californica G. F. Hrusa 1993-5-2 10859 Colusa Frenzel Creek Research Natural Area; Mendocino National Forest. Small colony of several clumps on lower NW facing slopes in mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Scattered among openings in sparse Quercus durata chaparral. Perennial. Comment
  CHSC100246  Melica californica D. Isle 1988-4-13 1507 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  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
  UCD86457  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  JEPS121114  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD56672  Melica torreyana Jack Alderson 2007-3-25 8 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 555 Comment
  UCD66576  Melica torreyana Craig D. Thomsen 2001-5-24 2524 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
  CHSC94747  Melilotus albus Lowell Ahart 2006-9-26 13349 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  RSA724820  Melilotus albus L. Ahart 2006-9-26 13349 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road about 3 miles west of Colusa Princeton Road, about 5 1/2 mils east of Maxwell. 24 Comment
  UCD72468  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3802 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 260 Comment
  CHSC112256  Melilotus indicus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18646 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
  RSA718054  Mentha arvensis L. Ahart 2006-8-9 13090 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  CHSC94289  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
  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
  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
  JEPS110060  Mentha spicata var. spicata Lowell Ahart 2006-8-22 13207 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC75615  Mentzelia dispersa Vernon H. Oswald; Lowell Ahart 1999-6-22 9778 Colusa Lily Pond near upper Letts Lake west of Stonyford. 1243 Comment
  CDA36623  Mentzelia laevicaulis R. Lawley Colusa Mendocino National Forest, Stonyford. 0 Comment
  UCD170080  Mentzelia micrantha Jack Alderson 2016-5-14 s.n. Colusa BLM Bear Creek Ranch (formerly Payne Ranch); 5500 feet (1675 m) south of the intersection of Highway 20 and the Colusa County line. 499 Comment
  UCD82738  Mentzelia micrantha Craig Thomsen; G. Harrington 2009-5-14 2919 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. 822 Comment
  UCD38806  Mentzelia micrantha Beecher Crampton 1958-5-19 4821 Colusa Colusa County, 6.3 miles northeast of Ladoga. Comment
  UCD63030  Micranthes californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4682 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Eula Canyon. 313 Comment
  POM174563  Micropus californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit on grade. Williams- Stonyford Road Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CAS-BOT-BC348362  Micropus californicus var. californicus Roxana S. Ferris 1917-4-14 573 Colusa Foothills 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC62919  Micropus californicus var. californicus Vernon H. Oswald; Lowell Ahart 1994-4-6 6067 B Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. 469 Comment
  CHSC79254  Micropus californicus var. californicus B. Castro; L. P. Janeway 2000-4-10 1065 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 106 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
  HSC40247  Micropus californicus var. californicus J. P. Smith, Thomas W. Nelson 1976-4-14 8584 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  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
  UC638694  Micropus californicus var. californicus Ethel Crum 1938-5-7 2011 Colusa summit of ridge 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  CAS-BOT-BC348829  Microseris douglasii subsp. douglasii Lewis S. Rose 1936-4-27 36185 A Colusa 15 mi. NW. of Rumsey 304 Comment
  CHSC114968  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Along Bear Valley Road, in Bear Valley, about 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles south of Highway 20. 395 Comment
  CHSC115388  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 Colusa Near a small drainage, burned over in 2012, rocky serpentine outcrop on the north side of State Highway 20, 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Inner Coast Range. 520 Comment
  JEPS124223  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 20001 Colusa Inner North Coast Range. About 50 yards west of Bear Creek, about 6 miles south of Leesville, about 6 miles north of Highway 20. Comment
  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
  CAS-BOT-BC348830  Microseris douglasii subsp. douglasii K. Curran 1889-4-1 s.n. Colusa Unspecified Comment
  UC92188  Microseris douglasii subsp. douglasii Brandegee April 1889 Colusa Comment
  JEPS86634  Microseris nutans L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6694 Colusa near road w Summit Springs (sw flank Snow Mountain); Colusa-Lake County Line, sw flank Snow Mountain 1550 Comment
  JEPS94209  Microseris sylvatica Vernon Oswald and Lowell Ahart 1998-5-7 8991 Colusa Lodoga-Leesville Road 4.3 mi s of Cooks Springs Road; Lodoga-Leesville Road 469 Comment
  UCD143422  Microsteris gracilis Oren Pollak 1987-4-10 s.n. Colusa Bear Valley. Comment
  UCD57339  Microsteris gracilis Robin Testa 2007-3-25 2 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  RSA424702B  Microsteris gracilis subsp. gracilis Aaron Liston, M. A. Blumler 1987-4-26 667 -14 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  CHSC112646  Mimetanthe pilosa Lowell Ahart 2013-10-1 19072 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  RSA46870  Mimulus aurantiacus var. aurantiacus Doris K. Kildale 1927-04 3244 Colusa [Unspecified] Comment
  JEPS75843  Mimulus breweri L. R. Heckard 1974-9-10 3910 Colusa ne slope West Peak; Snow Mt. 2011 Comment
  CDA41441  Mimulus douglasii S. E. Schoenig 1998-4-24 98 -8 Colusa Adjacent to clearing east of Brim Road, 1.5 miles west of Bear Valley Road. Comment
  CDA41442  Mimulus douglasii S. E. Schoenig 1998-4-24 98 -9 Colusa Barrel Springs, 200 meters west of parking area off Walker Ridge Road, 1 mile south of intersection with Brim Road. Comment
  RSA535823  Mimulus douglasii David M. Thompson 1988-3-28 860 Colusa 2.0 mi W of Bear Valley Road along Bartlett Springs Road. 0.25 mi W of a road culvert for a small stream. 534 Comment
  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
  UCD64424  Mimulus guttatus Craig D. Thomsen 2000-4-28 2187 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  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
  UCD82521  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2878 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  SBBG128807  Mimulus guttatus L. Ahart 2013-5-1 18688 Colusa small drainage, N of the wash and 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
  UC1212581  Mimulus layneae Francia Chisaki, Helen K. Sharsmith 1959-5-27 1338 Colusa about 1/4 mi e Cooks Spring; Inner North Coast Ranges, Cooks Creek Comment
Read comments
Nov 19 2007
  UC971992  Mimulus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  RSA114162  Mimulus layneae H. K. Sharsmith 1953-6-20 4290 Colusa 5 miles beyond Trough Springs on road to Goat Mountain, Mendocino National Forest. 1280 Comment
  SEINET7881836 Image available Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa Mendocino Nat For ; In metamorphic rubble of forest clearing 5 mi beyond Trough Springs on rd to Goat Mt. 1280 Comment
  SEINET10756213  Mimulus moschatus Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 912 Colusa Mendocino National Forest, Grindstone Ranger District. Big Spring Picnic area on Lett's Lake, off Forest Service road 17N02, 3.2 miles SW from interesection with Forest Service route M10. T17N R8W S25. 1371 Comment
  HSC96797  Mimulus nudatus L. Ahart 2006-6-11 12663 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS82743  Mimulus nudatus L. R. Heckard and J. C. Hickman 1984-4-6 6149 Colusa just e Lake County line (along route 20) Comment
  RSA0118631  Mimulus pilosus Lowell A. Ahart 2013-10-1 19072 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
  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
  JEPS60201  Mimulus rattanii L. R. Heckard 1969-5-29 2237 Colusa about 6 1/2 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  IRVC29627  Minuartia Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5024 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
  UC1613426  Minuartia douglasii Charles M. Belshaw 1937-4-25 2876 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  JEPS73512  Minuartia nuttallii subsp. gregaria L. R. Heckard 1972-7-10 3130 Colusa overlooking and 3 mi nw Fouts Springs (promontory on se corner); Snow Mt. 1828 Comment
  JEPS81413  Minuartia nuttallii subsp. gregaria L. R. Heckard and J. C. Hickman 1982-7-9 6021 Colusa just e Lookout (Colusa-Lake Co. boundary); Goat Mt. 1859 Comment
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  JEPS89251  Moluccella laevis Frank A. Leach 1919-1-1 Colusa w of Williams (Elbert Brim ranch) Comment
  JEPS80272  Monardella odoratissima subsp. glauca L. R. Heckard and J. Hickman 1980-9-16 5455 Colusa East of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  UCD67691  Monardella sheltonii D. Sanchez-Mata 1996-6-27 s.n. Colusa Williams, Blue Ridge, Bear Creek. 320 Comment
  UCD70238  Monardella sheltonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Bear Valley Road. Bear Valley Creek. 350 Comment
  CHSC106248  Monardella villosa B. Castro; L. P. Janeway 2001-6-3 1261 Colusa Inner North Coast Ranges. 'Til Jones Spring' at headwaters of Freshwater Branch of E. Fork Sulphur Ck, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 Comment
  CHSC83196  Monardella villosa D. Sanchez-Mata 1996-6-27 Colusa Williams. Blue Ridge. In Bear Creek. 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
  UCD81712  Monardella villosa subsp. villosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5718 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  JEPS34930  Monolopia major Alice King May 1906 Colusa College City Comment
  JEPS35220  Monolopia major Ruth Johnson 1915-4-6 Colusa College City Comment
  UC90430  Monolopia major K. Brandegee April 1889 Colusa 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
  JEPS15550  Muhlenbergia filiformis G. Thomas Robbins with L. R. Heckard 1956-7-25 3707 Colusa in meadow along trail due s Snow Mt. East (skirting eastern base of ridge forming Snow Mt. West) 1981 Comment
  SEINET3243572  Muilla maritima Frank W. Gould 1938-1 302 Colusa Four miles north of Maxwell, Colusa County. Comment
  CAS-BOT-BC83270  Myosurus minimus Roxana S. Ferris 1917-4-10 1441 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83272  Myosurus minimus Roxana S. Ferris 1918-4-10 1442 Colusa 4 miles east of Williams. Comment
  UCD18836  Myosurus minimus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 143 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  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
  UC1114812  Myosurus sessilis Donald E. Stone Dec 8 1956-Apr 13 1957 26 -7 Colusa 3 mi e of the city of Maxwell (on the Maxwell Road); Maxwell Road 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
  CHSC48457  Myriophyllum hippuroides Vernon Oswald 1984-7-20 1621 Colusa Letts Lake in Mendocino National Forest. 1402 Comment
  UCR227337  Najas graminea Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5106 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon 511 Comment
  UC1100016  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 mi w of Colusa (on Williams Highway by bridge) Comment
  SEINET3237610  Najas guadalupensis subsp. guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  CHSC49580  Nassella cernua Vernon Oswald 1984-5-2 1165 Colusa Fouts Springs Rd. (M10) in the Mendocino National Forest, 4.6 mi w of Stonyford. 487 Comment
  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
  CHSC100258  Nassella pulchra D. Isle 1988-4-13 1506 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 Comment
  CHSC88537  Nassella pulchra B. Castro 2003-5-15 1441 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Upper and mid-slope on steep E-facing side of S-trending canyon. 213 Comment
  UCD87475  Nassella pulchra Beecher Crampton 1958-4-21 4732 Colusa Along State Hwy. 16. 12 miles northwest of Rumsey. Comment
  UCD87543  Nassella pulchra Freed W. Hoffman 1942-4-23 2253 Colusa Near Maxwell. 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
  UC908409  Navarretia cotulifolia Herbert L. Mason 1946-5-30 12817 Colusa near Eppersons; Bear Valley Comment
  RSA424699  Navarretia eriocephala Aaron Liston, M. A. Blumler 1987-4-26 668 -5 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  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
  JEPS80209  Navarretia intertexta L. R. Heckard and J. C. Hickman 1980-7-3 5363 Colusa Across road (north of) from Summit Springs, southwest slope of Snow Mt. 1548 Comment
  JEPS80763  Navarretia intertexta L. R. Heckard and J. C. Hickman 1981-7-30 5730 Colusa 182 Comment
Read comments
May 28 2012
  CHSC84247  Navarretia jepsonii Lowell Ahart 2003-7-14 10385 Colusa Field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  UC856832  Navarretia jepsonii A. A. Heller 1916-6-6 12356 Colusa about 3 mi w Leesville (on the grade); Coast Range Comment
  UC908621  Navarretia jepsonii Herbert L. Mason 1946-5-30 12814 Colusa about 1 mi e Lake County line (w Colusa County); Leesville Grade Comment
  UC908635  Navarretia jepsonii Herbert L. Mason 1946-5-31 12810 a Colusa near summit of Leesville Grade (drainage of n fork of Cache Creek); Cache Creek 548 Comment
  UCR261670  Navarretia jepsonii Ann Howald 2003-5-29 2346 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  POM64861  Navarretia leucocephala subsp. leucocephala Roxana Stinchfield 1916-7-11 449 Colusa Colusa - Williams Road at Trough Comment
  UCD84439  Navarretia mellita Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6049 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
  CHSC112918  Navarretia nigelliformis subsp. nigelliformis B. Castro; Robin Carter, Amy Lyons 2010-5-13 1807 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 121 Comment
  UCD63775  Navarretia nigelliformis subsp. nigelliformis Craig D. Thomsen 2008-5-31 2756 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  HSC90406  Navarretia sinistra subsp. pinnatisecta Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 49 Colusa 6 mi. E of intersection between Walker Ridge Rd. and Bear Valley Rd. 293 Comment
  SEINET10464797  Nemacladus capillaris Rattan 1884-1 RATTAN s.n. Colusa Above Stony Creek Comment
  CHSC77936  Nemophila heterophylla Beth Hendrickson; Jean Witzman 1999-4-21 Colusa Vicinity of Antelope Valley and Sites. 137 Comment
  SEINET5585803  Nemophila heterophylla Richard R. Halse 2013-1 8738 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UC72014  Nemophila heterophylla Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  UCR206667  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-3-17 14396 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
  JEPS3136  Nemophila menziesii Ruth Johnson 1915-4-6 Colusa College City Comment
  CHSC70890  Nemophila menziesii var. menziesii Vernon Oswald; Lowell Ahart 1998-4-21 8949 Colusa Rd. 401 1.8 mi north of Grapevine Pass on the Sites-Lodoga Rd. 472 Comment
  JEPS81302  Nemophila parviflora L. R. Heckard and J. C. Hickman 1982-7-5 5916 Colusa grassy slope below Summit Springs (s side Snow Mt.); , below Summit Springs 1524 Comment
  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
  RSA141313  Nemophila pedunculata J. M. Tucker, Theodore F. Niehaus 1960-4-3 3584 Colusa 9.1 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  RSA0118880  Nicotiana acuminata var. multiflora Lowell Ahart 2013-10-1 19084 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
  UC71879  Nicotiana acuminata var. multiflora H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  JEPS87760  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
  CHSC101616  Nuttallanthus canadensis David W. Isle; Teal Richards 2002-4-18 1652 Colusa Mendocino National Forest. N of Fouts Springs, S of Chlorinator Building on road to Bathhouse Trail (Snow Mountain). SE aspect drainage in chamise chamassal site burned during 8/8/01 Trough Fire. Teal Richards-DI Reveg. Study Plot. MDB and M. 524 Comment
  JEPS127817  Orobanche bulbosa Susan Fawcett 2014-5-13 226 Colusa Walker Ridge, near border of Lake and Colusa Counties. Comment
  UC1229784  Orobanche bulbosa G. Newcomb, F. Chisaki 1958-6-23 1165 Colusa North Coast Range, on John Smith Road John Smith Road; North Coast Range, John Smith Road Comment
  UCD66934  Orobanche bulbosa Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5083 Colusa BLM Payne Ranch. Lands to the SW of jct of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa Counties. South of junction with trail that heads down to the headwaters of Thompson Creek. 568 Comment
  UC1187361  Orobanche californica subsp. grayana Herbert L. Mason 1945-7-11 12647 Colusa Near Butte Creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  CAS-BOT-BC502598  Orobanche californica subsp. jepsonii Roxana Stinchfield 1916-7-11 451 Colusa Colusa--Williams Road at trough Comment
  RSA408803  Orthocarpus attenuatus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3940 Colusa Along Bear Valley Rd., 2 miles from jct with Hwy 20. 366 Comment
  UCD40885  Orthocarpus purpurascens Richard Schulhof 1984-4-21 6 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 Comment
  UCD40886  Orthocarpus purpurascens G. Robinson 1984-4-21 3 Colusa About 50 yards west of Wilbur Springs Road on Bear Valley Road. 3.2 miles north of Hwy 20. 390 Comment
  RSA430221  Orthocarpus purpurascens var. purpurascens Eugene Tanimoto 1975-4-20 13 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  JEPS73443  Osmorhiza occidentalis L. R. Heckard 1972-7-8 3038 Colusa near summit ridge se West Peak (Lake-Colusa Co. boundary); Snow Mt. 2072 Comment
  CHSC88565  Packera clevelandii L. P. Janeway; B. Castro 2001-6-3 7103 Colusa Inner North Coast Ranges. At Buck Flat: east side of Walker Ridge at head of Gaither Canyon; about 1.3 km south-southeast of Baldy Mountain. Meadow. 872 Comment
  CHSC88577  Packera clevelandii L. P. Janeway 2001-6-6 7112 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  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
  UCD163327  Packera eurycephala Craig D. Thomsen 2009-5-3 2792 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UC91676  Packera eurycephala var. eurycephala Brandegee May 1887 Colusa Epperson's Comment
  SFV12205  Packera eurycephala var. eurycephala J. M. Tucker 1968-5-4 4108 Colusa Bear Valley, open valley floor, 8.6 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 Comment
  UCD82522  Packera greenei Craig Thomsen; G. Harrington 2009-5-12 2879 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  CDA11257  Parnassia californica G. F. Hrusa 1994-11-7 11992 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. Frenzel Creek a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  UCR115039  Parnassia californica G. Fred Hrusa 1994-11-7 11993 Colusa Banks of Little Stony Creek, c. 2.5 mi above Stonyford-Lodoga Rd. on Goat Mtn Road. 440 Comment
  UC1037264  Paspalum boscianum E. Wilson 1934-8-9 54 Colusa Biggs Comment
  POM198505  Paspalum distichum Roxana Stinchfield 1916-7-11 454 Colusa Williams Road-the 'Trough' Comment
  UCR261665  Pectocarya setosa Ann Howald 2003-5-5 2329 Colusa Inner North Coast Ranges, Goat Mountain Road, c. 0.25 mile west of intersection with Lodoga-Stonyford Road 394 Comment
  UC1051747  Pediomelum californicum Helen K. Sharsmith 1953-6-21 4304 Colusa ca 1 mi within boundary of Mendocino National Forest (slopes of Little Stoney Creek); Mendocino Nat For, Little Stoney Creek, Inner N Coast Ranges 670 Comment
  UCD84548  Pediomelum californicum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6146 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
  CHSC77906  Pellaea andromedifolia Beth Hendrickson; Jean Witzman, Mary Ann Griggs 1999-3-16 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 158 Comment
  UCD70232  Pellaea mucronata D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 350 Comment
  UCR37571  Penstemon heterophyllus Michelle A. Strull, Et al. 1984-4-28 12 Colusa Brim Road 1.6 mi west of Leesville-Lodoga Jct. 419 Comment
  CAS-BOT-BC240290  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
  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
  UC614476  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Lower Lake-Williams Road 11 mi ne Lake-Colusa Line (above Salt Creek); Inner North Coast RAnges, above Salt Creek 152 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
  NY601765  Penstemon heterophyllus var. purdyi A. A. Heller 1919-5-10 13118 Colusa Valley west of Leesville Comment
  UC125238  Penstemon purpusii Katharine Brandegee 1892-8-24 Colusa Snow Mountain near Monument; Snow Mountain near the Monument Comment
  UCD124200  Penstemon purpusii G. Ledyard Stebbins Jr. 1964-7-4 6174 Colusa East of summit, Mt. St. John, west of Stonyford. 1828 Comment
  CHSC70866  Pentachaeta exilis subsp. exilis Vernon Oswald; Lowell Ahart 1998-4-21 8947 Colusa Goat Mtn. Rd. 0.2 mi southwest of Stonyford-Lodoga Rd. Roadside. 390 Comment
  CHSC42651  Perideridia kelloggii Vernon Oswald 1986-6-30 2175 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  JEPS75733  Perideridia kelloggii L. R. Heckard 1974-9-9 3875 Colusa Just northeasts of rocky promontory southeast of Foutch Camp; Snow Mts. Comment
  JEPS75749  Perideridia kelloggii L. R. Heckard, and R. Bacigalupi 1976-9-6 4428 Colusa along trail from Summit Springs to Fout's Camp (Colusa-Lake Co. line); Snow Mt. 1798 Comment
  UC1389985  Perideridia kelloggii Freed W. Hoffman 1947-6-19 1659 Colusa Cooks Springs North Coast Ranges (w Colusa Co.) Comment
  UC875337  Perideridia kelloggii A. A. Heller 1916-6-6 12361 Colusa grade about 3 mi w Leesville; Coast Range Comment
  UCD82501  Perideridia kelloggii Craig Thomsen; G. Harrington 2009-5-12 2860 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCR261734  Perideridia kelloggii Ann Howald 2003-5-30 2357 A Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CHSC112625  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC94698  Persicaria maculosa Lowell Ahart 2006-9-26 13354 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
  CHSC61435  Persicaria punctata Vernon H. Oswald 1993-8-16 5807 Colusa Sacramento National Wildlife Refuge located ca. 7 mi S of Willows, W1/4 of Tract 44, near the S boundary of the refuge. Growing in shallow water on the N edge of Hunters Creek. 24 Comment
  UC71625  Phacelia ciliata var. ciliata Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC278171  Phacelia distans Mona Bourell 1997-3-29 5807 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  CHSC7067  Phacelia divaricata M. I. Moore 1969-4-15 9 Colusa 19.3 mi w of Williams, Calif. s side of Hwy. 20. 182 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
  SEINET7096745  Phacelia heterophylla subsp. virgata A. G. Vestal 1955-4-5 s.n. Colusa Steep south of facing bank ca. 1/3 mile into Colusa National Wildlife Refuge on Route 20.NAD27, 39? deg. 09' 09ao, -122?_ 11ao (converted to WGS84 decimal degrees) UTM Zone 10, 570301mE, 4333799mN. Comment
  HSC47567  Phacelia imbricata Sheila Logan 1978-4-22 67 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD66695  Phacelia imbricata Craig D. Thomsen 2000-6-23 2381 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  JEPS2143  Phacelia imbricata subsp. imbricata W. L. Jepson 1932-5-8 16296 Colusa n Stonyford (w Colusa Co.) 365 Comment
  JEPS81284  Phacelia imbricata subsp. imbricata L. R. Heckard and J. C. Hickman 1982-7-5 5895 Colusa slope below (s) Summit Springs (s side of mt.); Snow Mt. 1500 Comment
  POM163452  Phacelia imbricata subsp. imbricata Roxana S. Ferris 1926-4-23 6420 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  SEINET5520514  Phacelia imbricata subsp. imbricata R. R. Halse 2010-3-25 7850 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  CHSC32213  Phacelia mutabilis James Jokerst 1980-8-6 1059 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
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Feb 2 2007
  HSC62807  Phacelia tanacetifolia J. M. DiTomaso 1979-4-14 875 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  POM163459  Phacelia tanacetifolia Roxana S. Ferris 1926-4-23 6407 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  UC765521  Phacelia tanacetifolia R. F. Hoover 1938-4-24 3230 Colusa below Sites; Stone Corral Canyon Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCR227636  Phalaris aquatica Craig D. Thomsen, Gordon Harrington 2008-7-6 2779 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  POM198501  Phalaris lemmonii Roxana S. Ferris 1917-4-12 547 Colusa 4 miles east of Williams. Comment
  SEINET10660257  Phalaris lemmonii Roxana S. Ferris 1917-4-12 Ferris 547 Colusa 4 miles east of Williams; Alkali Plains Comment
  CAS-BOT-BC265956  Phalaris minor Roxana S. Ferris 1917-4-12 508 Colusa 4 miles east of Williams Comment
  CHSC107124  Phalaris paradoxa L. P. Janeway; B. Castro 2011-5-19 10285 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. 49 Comment
  CHSC8264  Phalaris paradoxa J. G. Moore 1969-5-9 45 Colusa Hwy 162, 4 mi. n of Rd. Z, on e side of road next to rice fields. 60 Comment
  CHSC85974  Phalaris paradoxa Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  UCD63034  Phalaris paradoxa Ellen Dean; Marjorie Phan and Gerald Dickinson 2008-4-27 4880 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Across Bear Creek from Cowboy Camp. 323 Comment
  JEPS86610  Phlox gracilis L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6710 Colusa 0.5 mi ne Summit Springs (sw flank of Snow Mountain, Colusa-Lake Co line); Snow Mountain 1640 Comment
  JEPS80242  Phoradendron villosum L. R. Heckard and J. Hickman 1980-7-3 5403 Colusa near Summit Springs (Snow Mt.); Snow Mt. Comment
  UC727675  Phyla lanceolata Milo S. Baker 1946-9-3 11622 Colusa near locked gate Colusa Gun Club (Butte Sink); Butte Sink Comment
  POM63850  Phyla nodiflora Roxana Stinchfield 1916-6-11 444 Colusa Willow Lake near Colusa -Williams Road. Comment
  CHSC60924  Phyla nodiflora var. rosea Vernon H. Oswald 1993-6-23 5571 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, near the S side of Cell 2, Pool 10. 21 Comment
  UCD126762  Physalis lancifolia June McCaskill 1954-8-9 364 Colusa Butte Creek Farms, on east side of Sacramento River, around 4 miles east of Colusa. Comment
  UCD80817  Pickeringia montana Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5273 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. E-facing slope above Eula Canyon. Between the headwater areas of Craig and Eula Canyons. 528 Comment
  CHSC94297  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS110173  Piptatherum miliaceum Lowell Ahart 2006-8-9 13106 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CAS-BOT-BC227985  Plagiobothrys Roxana S. Ferris 1926-4-21 6295 Colusa 3 miles W of Colusa Comment
  CHSC81227  Plagiobothrys bracteatus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  UCD57876  Plagiobothrys bracteatus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 53 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  SBBG126070  Plagiobothrys canescens G. K. Helmkamp with E. A. Helmkamp 2009-5-20 14750 Colusa St Hwy 16 at "Cowboy Camp" 1.0 mi S of jct with St Hwy 20, adjacent to Bear Crk 332 Comment
  UCD15421  Plagiobothrys collinus var. californicus Margit Sands 1985-4-13 23 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  CHSC71109  Plagiobothrys fulvus Jan Monelo 1989-4-1 14 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
  CHSC112920  Plagiobothrys greenei B. Castro; L. Janeway, Robin Carter 2010-3-23 1804 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in disturbed, grazed annual grassland. 121 Comment
  CHSC29722  Plagiobothrys humistratus K. R. Stern 1980-4-1 6621 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD58113  Plagiobothrys humistratus Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3380 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. Along unimproved road that goes south from Hwy. 20, ca. 2.3 road miles W of junction with Hwy. 16. Unnamed valley with old building called 'Roadkill Cafe. 414 Comment
  JEPS80194  Plagiobothrys nothofulvus L. R. Heckard and J. Hickman 1980-7-3 5347 Colusa ca 10 mi w Stonyford (just w of Summit Springs, sw of Snow Mt., Colusa-Lake County boundary) 1548 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
  UCD82471  Plagiobothrys nothofulvus Craig Thomsen; G. Harrington 2009-5-12 2849 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC99265  Plagiobothrys nothofulvus D. R. Junell 1965-4-18 20 Colusa 2 mi. E on Hwy. 16 from junction with Hwy. 20 Comment
  JEPS124210  Plagiobothrys stipitatus Lowell Ahart 2015-4-10 20006 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  RSA10707  Plagiobothrys stipitatus C. B. Wolf 1928-5-8 2124 Colusa Sacramento Valley. 3 mi. S of Arbuckle Comment
  CHSC107976  Plagiobothrys stipitatus var. micranthus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1857 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  POM63664  Plagiobothrys stipitatus var. micranthus Roxana S. Ferris 1917-4-12 534 Colusa 4 miles east of Williams. Comment
  SD27804  Plagiobothrys stipitatus var. micranthus Carl B. Wolf 1928-5-8 2123 Colusa 3.0 miles south of Arbuckle. 42 Comment
  UC79383  Plagiobothrys stipitatus var. micranthus Katharine Brandegee Apr 1889 Colusa Colusa Junction Comment
  UCD58097  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3474 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  UCD66869  Plagiobothrys stipitatus var. micranthus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5072 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
  JEPS61053  Plagiobothrys stipitatus var. stipitatus Alice King May 1906 Colusa College City Comment
  UCR212375  Plagiobothrys stipitatus var. stipitatus Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon 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 20 320 Comment
  CHSC62922  Plagiobothrys tenellus Vernon H. Oswald; Lowell Ahart 1994-4-6 6069 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On the slopes bordering Sullivan Creek. 469 Comment
  HSC47746  Plagiobothrys tenellus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3941 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD36224  Plantago coronopus Beecher Crampton 1953-4-29 1144 Colusa Colusa County, 2 miles east of Maxwell. 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
  JEPS20847  Plantago elongata B. Crampton 1953-4-29 1147 Colusa about 3 mi e Maxwell Comment
  SEINET8665579  Plantago elongata R. R. Halse 2010-3-20 7828 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  UCD18835  Plantago elongata Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 142 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
  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
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. Comment
  UCD64289  Plantago erecta Craig D. Thomsen 2000-3-31 2122 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
  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
  JEPS110111  Plantago major Lowell Ahart 2006-8-9 13152 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
  CHSC19695  Platystemon californicus L. A. Wright Jr. 1971-3-27 16 Colusa W side of Hwy 20, ca. 1 mi nw of junc of Hwy 16 and 20. 243 Comment
  CHSC79537  Platystemon californicus Simona Altman 1999-4-3 53 Colusa Bear Valley, Bear Valley Rd. 396 Comment
  JEPS51624  Platystemon californicus Alice King 1906-4 Colusa College City Comment
  SEINET3124160 Image available Platystemon californicus Sandra Wainwright 1969-4-13 1 Colusa Bear Valley, 9.5 miles north of State Highway 20 Comment
  UC72707  Platystemon californicus Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  UCD56922  Platystemon californicus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3525 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CAS-BOT-BC91596  Platystemon californicus D. Rhode 1977-4-30 2 Colusa 0.6 miles west Bear Creek. 403 Comment
  CDA34082  Platystemon californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD13217  Platystemon californicus Steve Daniel 1986-4-13 10 Colusa California. Colusa Co. Bear Valley, 7.6 mi No of jct of Bear Valley Rd. and hwy 20. Elev. ca. 1300 ft. 396 Comment
  UCD14364  Platystemon californicus L. Coats 1983-4-24 15 Colusa Colusa Co.; along Bear Valley Road, 4.3 miles south of Bartlett Springs Road; Comment
  UCD22719  Platystemon californicus Nancy Vucinich 1978-4-8 6 Colusa Bear Valley. 10.3 miles(by road) north of the junction of Hwys 16 and 20. 396 Comment
  JEPS87664  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  UC1018913  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 a Colusa Colusa County 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
  UCD67594  Plectritis macrocera Charles Martin 1986-5-17 33 Colusa Mendocino National Forest, along Forest Rd. 17NO2, 3.2 miles south of junction with Forest service road 18NO1, Mill Valley campground. In wet meadow, growing in moist soil. Herb, ca. 1ft tall. Small purple flowers in a head, ca. 1 ft tall. Comment
  UCD41210  Plectritis macrocera John Snelling 1986-5-17 3 - Colusa Mill Valley campsite off of Forest Service Road 18N01. Comment
  UCR206675  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-1-31 14322 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  CHSC57562  Poa bulbosa Steven Triano 1987-4-4 16 Colusa Salt Canyon, n side of Salt Creek, ca. 40 ft s of Hwy 20, 11 mi wsw of Williams. 143 Comment
  UCD57879  Poa bulbosa Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 54 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD90600  Poa bulbosa Tom Aldrich 1963-4-26 s.n. Colusa Colusa. Comment
  CHSC101409  Poa leptocoma subsp. leptocoma David Isle 1990-6-6 1530 Colusa From Lower Summit Valley below Rock Outcrop w of Rd 17N10. 1682 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
  UCD82719  Poa pratensis Craig Thomsen; G. Harrington 2009-5-14 2902 Colusa Colusa County on Walker Ridge: Probably from Eaton Springs about one mile east of Walker Ridge Road. Comment
  CAS-BOT-BC236333  Poa secunda subsp. secunda Roxana S. Ferris 1917-4-14 575 Colusa Arbuckle - Rumsey Road. Foothills W of Arbuckle Comment
  UCD90886  Poa secunda subsp. secunda John R. Davey 1967-12-2 90 Colusa Border, ca. 5-6 miles WSW of Leesville, Bartlett Springs Road N of Baldy Mountain. 609 Comment
  POM62478  Pogogyne douglasii Roxana Stinchfield 1916-7-11 448 Colusa Colusa - Williams Road at Trough Comment
  CHSC84938  Polygonum aviculare Lowell Ahart 2003-10-23 10657 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC6655  Polygonum aviculare subsp. aviculare J. Burtt Davy May, 1898 Colusa near Willows Comment
  CAS-BOT-BC413964  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-7-11 457 Colusa Sycamore Comment
  JEPS81372  Polygonum davisiae L. R. Heckard and J. C. Hickman 1982-7-8 5983 Colusa just n summit marker (West Peak and Cirque from West Peak); Snow Mt. Comment
  JEPS80203  Polygonum douglasii subsp. douglasii L. R. Heckard and J. Hickman 1980-7-3 5358 Colusa just w Summit Springs (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  JEPS75842  Polygonum minimum L. R. Heckard 1974-9-10 3902 Colusa West Peak Snow Mt. (ne slope) 2103 Comment
  UC1299697  Polygonum sawatchense subsp. sawatchense Freed W. Hoffman 1948-6-27 2528 Colusa 8.6 mi sw Fouts Spring (w Colusa Co.); Upper Letts Valley 1310 Comment
  UC1100402  Polypogon interruptus Malcolm A. Nobs and S. Galen Smith 1949-9-9 1875 Colusa 3 mi w Williams Comment
  CHSC107163  Polypogon maritimus L. P. Janeway; B. Castro 2011-5-19 10281 A 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. At edge of deepest west end of the marsh in a large patch of Juncus balticus, at the edge of the water line. 49 Comment
  CHSC107982  Polypogon monspeliensis B. Castro; L. Janeway 2011-4-27 1865 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Around edges of alkaline flat off northwest corner of large +/- alkaline marsh. 49 Comment
  CHSC77410  Polypogon monspeliensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CHSC77637  Polypogon monspeliensis Heidi West; Caroline Warren, Julie Cunningham, Jenny Marr 1998-5-27 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 121 Comment
  CHSC94414  Polypogon monspeliensis Lowell Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS75438  Polypogon monspeliensis W. L. Jepson 1934-5-4 16604 Colusa Princeton Comment
  RSA725017  Polypogon monspeliensis L. Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  SEINET10901036  Polypogon monspeliensis Katherine L. Morris 1973-6-6 Morris 384 Colusa Chaparral woodland and sparse oaks; on Hwy 20, 0.3 mi E of Lake County line. Comment
  JEPS127193  Polystichum munitum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20720 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  SEINET10333351  Populus fremontii R. R. Halse 1988-2-14 3536 Colusa Along State Hwy 20 where it crosses over Salt Creek at the E end of Salt Canyon. 100 Comment
  HSC59137  Populus fremontii subsp. fremontii Terry Roth 1979-5-7 41 Colusa Where Hwy. 20 enters Salt Canyon along Salt Creek 122 Comment
  UCD81888  Potamogeton nodosus Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5772 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  UCD82732  Potentilla Craig Thomsen; G. Harrington 2009-5-14 2911 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  RSA666315  Potentilla drummondii Barbara Ertter 1989-7-2 8627 Colusa Long Glade, a V shaped meadow S of Milk Ranch just W of snow Mt West, about 11 airmiles due W of Stonyford. 1957 Comment
  UCD164036  Poterium sanguisorba Amber Flores 2016-4-9 2 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just west of Cowboy Camp on east side of Bear Creek. 311 Comment
  JEPS27878  Proboscidea louisianica subsp. louisianica Richard Snow 1958-8-3 672 Colusa on road to Leesville near Hwy 20 Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  JEPS101449  Proboscidea lutea Dean W. Taylor 1999-8-10 17295 Colusa 1 mile South of Williams, field between Interstate 5 and Delphos Road (old highway), 150 meters southeast of Husted Road freeway overcrossing 29 Comment
  CHSC1582  Prunus emarginata F. Wigmore 1931-5-1 Colusa Stony Creek gorge. Comment
  JEPS75725  Prunus emarginata L. R. Heckard 1974-9-9 3860 Colusa w of Trout Creek crossing on trail from Foutch CAmp (Snow Mountain); Snow Mountain 1828 Comment
  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
  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
  POM174580  Prunus virginiana var. demissa Roxana S. Ferris 1926-4-23 6452 Colusa Stream near Ladoga Comment
  UC1299163  Prunus virginiana var. demissa Freed W. Hoffman 1948-6-27 2523 Colusa 8.5 mi sw of Fauts Springs (western Colusa County); North Coast Ranges 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
  JEPS108724  Pseudognaphalium californicum Lowell Ahart 2006-6-15 12791 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford 500 Comment
  UCD159336  Pseudognaphalium californicum D. S. Park; E. Dean 2010-6-5 120 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  UCD67072  Pseudognaphalium californicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon. Just south of junction with trail that leads east to Brophy Canyon and Thompson Creek. 494 Comment
  CHSC94451  Pseudognaphalium luteoalbum Lowell Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110103  Pseudognaphalium luteoalbum Lowell Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 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
  JEPS120796  Pseudognaphalium stramineum Lowell Ahart 2013-10-1 19070 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
  JEPS40460  Psilocarphus brevissimus var. brevissimus W. L. Jepson 1934-5-3 16598 Colusa College City Comment
  UC1601294  Psilocarphus oregonus T. S. Brandegee Colusa Williams Comment
  JEPS75721  Psilocarphus tenellus L. R. Heckard 1974-9-9 3853 Colusa just se Foutch Camp; Snow Mountain 1889 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
  UCD135319  Psilocarphus tenellus Kim E. Steiner 1978-4-29 201 Colusa southwest-facing slope, Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 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
  CHSC112221  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  CHSC79346  Pterostegia drymarioides B. Castro; L. P. Janeway 2000-4-10 1064 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 121 Comment
  HSC45682  Pterostegia drymarioides Sheila Logan 1978-4-22 63 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS15216  Purshia tridentata var. tridentata Rimo Bacigalupi with L. T. Dempster, Mrs. P. A. Munz and G. T. Robbins 1956-7-25 5747 Colusa about 0.75 mi w Fouts Camp (s shoulder of Snow Mountains, Colusa-Lake County boundary); Snow Mountains 1905 Comment
  JEPS75754  Pyrola dentata L. R. Heckard and R. Bacigalupi 1976-9-6 4436 Colusa East of Trout Creek crossing, Snow Mountain 1859 Comment
  CDA16102  Quercus berberidifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15251 Colusa North Coast Ranges; Goat Mtn. Rd., +/- 1/4 mi W of Pine Flat camp. 426 Comment
  UCD146596  Quercus berberidifolia G. F. Hrusa 1998-6-19 14609 Colusa Inner North Coast Ranges. Above upper Little Stony Creek. Goat Mountain Road. Around 1.5 km west of campground. 485 Comment
  UCD83633  Quercus berberidifolia Fanny Ye; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 Comment
  SD236305  Quercus douglasii G. 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. 17 Comment
  UCD13383  Quercus durata Charles Martin 1986-5-17 31 Colusa 5.7 miles west of Stonyford, along Foot Springs Rd. Comment
  UCD55461  Quercus durata Ellen Dean; Gordon Harrington 2006-10-6 3285 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 381 Comment
  CDA21886  Quercus durata var. durata L. P. Janeway 2000-5-31 6774 Colusa Inner North Coast Ranges.; On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. Comment
  CHSC79514  Quercus durata var. durata L. P. Janeway 2000-5-31 6774 Colusa Inner North Coast Ranges. On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. 884 Comment
  HSC71309  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4617 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD169982  Quercus garryana G. F. Hrusa; Dmitri Geltman 1999-8-18 15249 Colusa Goat Mtn. summit. 1706 Comment
  CHSC92580  Quercus garryana var. breweri D. Isle 2005-7-14 1154 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Board Camp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  CAS-BOT-BC376598  Quercus lobata Andrew Townesmith; Karen M. Meyer 2007-8-7 908 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford 499 Comment
  CAS-BOT-BC61589  Quercus lobata Roxana Stinchfield 1916-7-9 428 Colusa grove near Sycamore. Phillips Ranch Comment
  HSC90085  Quercus lobata Pamela Grefsrud, Marty Reed, Eileen Rohmer 1990-4-15 55 Colusa Bear Valley Rd. 0.5 mi. NM of Lambert Rd. 427 Comment
  SEINET10881720  Quercus lobata Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 908 Colusa Mendocino National Forest, Grindstone Ranger District. Vicinity of Mill Creek Campground/Davis Flat OHV staging area. Off Forest Service route M10, 8.2 miles west of intersection with Lodoga-Stonyford road in Stonyford. T18N R7W, near edge between sections 4 and 5. 499 Comment
  UCR205170  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14251 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  RSA623529  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa Across Sulphur Creek from Wilbur Springs Comment
  UCD14530  Quercus palmeri John M. Tucker 1991-8-19 4496 -B Colusa California, Colusa Co.; across Sulphur Creek from, and southeast of, the hotel at Wilbur Springs; Comment
  HSC48162  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Along Bear Valley Rd. ca. 2 mi. from its junction with S.R. 20 366 Comment
  RSA275336  Rafinesquia californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3926 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  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
  JEPS81342  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  UCD66942  Ranunculus aquatilis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5091 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UCR212367  Ranunculus arvensis Craig D. Thomsen 2000-5-12 2324 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  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
  POM163507  Ranunculus californicus var. rugulosus Roxana S. Ferris 1926-4-21 6296 Colusa Colusa County: abandoned rice field, 2 miles W of Colusa Comment
  CHSC86880  Ranunculus canus B. Castro 2003-4-1 1408 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 146 Comment
  UCD57623  Ranunculus hebecarpus Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  SEINET12091613  Ranunculus hebecarpus S. E. Booth 1981-1 1 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, ca 11 mi wsw of Williams. Wilbur Springs Quadrangle 15 143 Comment
  SEINET12091630  Ranunculus hebecarpus C. L. Eddy 1984-1 3 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15 143 Comment
  UCSB63942  Ranunculus hebecarpus McBride, Marjorie 1986-4-5 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. Wilbur Springs Quadrangle, 15'. E central border of Sect, 32. T15N, R4W. 143 Comment
  UCD163699  Ranunculus occidentalis Craig Thomsen 1999-5-10 2005 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  UCD163876  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2464 b 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
  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
  UCD97058  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins; S. Galen Smith 1950-4-15 1907 Colusa Bear Valley. Comment
  UC1952501  Raphanus Richard Halse 2007-3-22 7105 Colusa Williams, by the junction of 5th Street and B Street 25 Comment
  CHSC99463  Raphanus raphanistrum Richard R. Halse 2007-3-22 7104 Colusa Williams; by the junction of 5th Street and B Street, 25 Comment
  RSA730245  Raphanus raphanistrum R. R. Halse 2007-3-22 7104 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  CAS-BOT-BC74220  Raphanus sativus Roxana Stinchfield 1916-7-11 438 Colusa Stinchfield Ranch near Sycamore. 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
  SEINET13946282 Image available Rhamnus californica A. A. Heller 1916-1 12360 Colusa Coast Range on the grade about 3 mi W of Leesville Comment
  CHSC75745  Rhamnus tomentella subsp. crassifolia Vernon H. Oswald; Lowell Ahart 1999-6-22 9785 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. Common shrub on a roadcut and on the rocky bank of Little Stony Creek. 426 Comment
  UC1299216  Rhamnus tomentella subsp. crassifolia Freed W. Hoffman 1947-6-19 1641 Colusa Cooks Springs, w Colusa County Cooks Springs 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
  CDA21471  Rhododendron occidentale G. F. Hrusa 1989-5-7 6083 Colusa North Coast Ranges; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  CAS-BOT-BC170522  Rhus aromatica Roxana S. Ferris 1926-4-23 6590 Colusa Near Stonyford. Comment
  HSC62926  Rhus aromatica Marla J. Carollo 1979-4-14 26 Colusa Buch Flat on Walker Ridge Rd. 884 Comment
  UCD15256  Rhus diversiloba R. A. Harris 1974-5-5 051 Colusa Robberts Flat, off of Bartlett Springs road. 487 Comment
  JEPS66281  Rhus trilobata W. L. Jepson 1932-5-8 16295 Colusa n of Stonyford 365 Comment
  RSA589945  Rhus trilobata Michael A. Vincent, Robert Rhode 1996-3-30 7274 Colusa Along Highway 16, near mile marker 5\55, 5.55 mi. S jct. Highway 20 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
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 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
  UCR281724  Ribes malvaceum David Isle 2015-6-20 2156 Colusa North Coast Range, c. 4 miles west of Stonyford, southeast of curve at culvert crossing just east of old dumpsite road junciton, uphill c. 200 ft south of 18N01 439 Comment
  HSC31993  Ribes malvaceum Steven Lagos 1974-5-4 59 Colusa Along roadside 747 Comment
  SEINET12217802  Ribes quercetorum Unknown 1987-1 70029 Colusa W of Williams, Bear Valley, Bear Valley Rd, ca 0.5 mi NE of intersection with Brim Rd 433 Comment
  CAS-BOT-BC293684  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest. Dixie Glade Campground 918 Comment
  SFV14515  Ribes roezlii M. L. Vincent 1968-6-6 786 Colusa Goat Mountain Road, 1 mile from Stony Ford turnoff. 1825 Comment
  CHSC86965  Rigiopappus leptocladus B. Castro; Michelle Cedarborg 2003-5-6 1428 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. 188 Comment
  UC638693  Rigiopappus leptocladus Ethel Crum 1938-5-7 2012 Colusa 4.2 mi n Rumsey (Comanche Hills, summit of ridge); Inner North Coast Range, summit of ridge, Comanche Hills 254 Comment
  UCD65630  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS80215  Rorippa nasturtium-aquaticum L. R. Heckard and J. Hickman 1980-7-3 5371 Colusa Summit Springs sw slope Snow Mt., Summit Springs 1554 Comment
  CHSC85959  Rosa californica Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  UC1051706  Rosa gymnocarpa Helen K. Sharsmith 1953-7-1 4405 Colusa near Old Mill Camp; Inner North Coast Ranges, Mendocino National Forest, Trough 1036 Comment
  CAS-BOT-BC158727  Rubus ursinus Roxana S. Ferris 1926-4-21 6310 Colusa Oak Graove Sycamore Slough, near Sycamore Comment
  CAS-BOT-BC158728  Rubus ursinus Roxana Stinchfield 1916-7-8 381 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC110478  Rumex Roxana Stinchfield 1916-7-9 418 Colusa Overflow land on Sacramento River - Phillips Ranch. 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
  CHSC32222  Rumex salicifolius James Jokerst 1980-8-6 1050 Colusa Near Snow Mountain (West). Comment
  UCD163344  Rumex salicifolius Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  CHSC79011  Sagina apetala J. Marr; C. Warren, H. West, N. Wight 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine Creek. 121 Comment
  POM313039  Sagittaria calycina H. L. Mason, Verne Grant 1946-8-6 12961 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of Sacramento River. Comment
  SBBG115378  Sagittaria latifolia J. McCaskill, Mr. Harvey, L. Davis 1954-8-9 365 Colusa Butte Crk, ca. 4 mi E of Colusa, on E side of Sacramento River Comment
  UCD138036  Sagittaria montevidensis subsp. calycina Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa 8 miles north of Colusa. Comment
  CHSC60893  Salicornia subterminalis Vernon H. Oswald 1993-6-23 5572 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, on the W edge of Cell 2, Pool 11. 22 Comment
  CHSC78975  Salicornia subterminalis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9979 Colusa Colusa National Wildlife Refuge. On the west side of Powell Slough 0.25 mi south-southwest of Refuge Headquarters. 15 Comment
  CHSC62849  Salix breweri Vernon H. Oswald; Lowell Ahart 1994-3-23 6016 Colusa Frenzel Creek Research Natural Area on the S side of Little Stony Creek, in the section of the E side of Frenzel Creek, S of Stonyford. 518 Comment
  CHSC75757  Salix breweri Vernon H. Oswald; Lowell Ahart 1999-6-22 9786 Colusa 1.5 mi west of Stonyford-Lodoga Road 42 paralleling Little Stony Creek. 426 Comment
  UCD55470  Salix breweri Ellen Dean; Gordon Harrington 2006-10-6 3294 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UCD81722  Salix breweri Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5726 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
  JEPS80787  Salix exigua L. R. Heckard and J. C. Hickman 1981-7-30 5760 Colusa se side Snow Mt. (Trout Creek) 1600 Comment
  UC1179058  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13159 Colusa ca. 3 mi n.e. Colusa (Butte Sink, along Butte Creek) Comment
  UC1179059  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13157 Colusa ca. 3 mi n.e. Colusa (along Butte Creek, Butte Sink) Comment
  CAS-BOT-BC104036  Salix hindsiana Roxana Stinchfield 1916-7-7 396 Colusa Sycamore Slough near Sycamore Comment
  CDA12796  Salix laevigata G. F. Hrusa 1996-2-26 12631 Colusa Inner North Coast Ranges; Small valley approx. 5 m. NW of Hwy. 20 along Leesville Rd. W of Oat Valley at S end of Boxer Valley. Comment
  CDA12799  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa Inner North Coast Ranges; On Sites-Lodoga Rd. ~2.5 m. NW of Sites at base of Little Antelope Grade. Comment
  UCD163851  Salix laevigata Craig D. Thomsen 2000-6-7 2368 b Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD164151  Salix laevigata Craig Thomsen 2000-3-31 2045 Colusa Bear Creek Canyon. About 5 miles north of Hwy 20, about 0.5 mile south of Wilbur Bridge. Comment
  UCD164155  Salix laevigata Craig Thomsen 1999-4-27 2000 Colusa southern Bear Valley. Comment
  UCR198150  Salix laevigata Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3677 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  UCR206356  Salix laevigata George K. Helmkamp, E. A. Helmkamp 2009-3-11 14380 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams beside Salt Creek 107 Comment
  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
  CDA5812  Salpichroa origanifolia Agricultural Commissioner 1960-3-29 Colusa 0 Comment
  CHSC101507  Salsola australis P. Akers 2003-10-7 Colusa North of Maxwell on frontage road east of Hwy 5, west of RR tracks, 1.8 mi north of Delevan Rd. 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
  CAS-BOT-BC176899  Salsola tragus Roxana Stinchfield 1916-7-8 369 Colusa Sycamore Slough Road Comment
  HSC45671  Salvia columbariae Stephen Plant 1978-4-22 206 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC596149  Salvia columbariae R. F. Hoover 1938-4-24 3228 Colusa ridge between Venado and Leesville Comment
  UCD41199  Salvia columbariae James Salyards 1986-5-17 86 - Colusa Along Sites-Lodoga Road, 8.2 mi. west of Sites. Comment
  UCD125359  Salvia mellifera D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Open serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  HSC39240  Sanicula bipinnatifida J. P. Smith, Thomas W. Nelson 1976-4-14 8577 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 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
  SEINET13945258 Image available Sanicula tuberosa J. L. Hobson 1974-1 58 Colusa 0.75 mi. from the junction to Indian Valley on Walker Ridge Rd. Elev. 2800', Wilbur Springs Quad. T14N R6W SEC12 853 Comment
  UCR206666  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-17 14390 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  RSA714648  Schedonorus pratensis Daisie Huang 2006-4-15 6041503 Colusa Maxwell rest stop on I-5. Flat meadow. 25 Comment
  POM185714  Schoenoplectus maritimus Roxana Stinchfield 1916-7-11 467 Colusa Davis Tule, near Sycamore Slough. 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
  UC1055825  Scirpus acutus var. occidentalis Frank W. Gould 1940-5-15 1257 Colusa 2.5 mi n Maxwell (in marshes along roadside); n of Maxwell Comment
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  UC1100922  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12975 Colusa pond 2.7 mi n of Colusa between Sacramento River and Butte Creek; Butte Sink, n of Colusa betw Sacramento River and Butte Cree Comment
  UC1100923  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12965 -A Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UCR261651  Scleranthus annuus subsp. annuus Ann Howald 2003-4-24 2318 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  JEPS21848  Scribneria bolanderi John R. Swanson 1958-4-26 308 Colusa 1.4 mi w of Bear Valley (on road toward Bartlett Springs) 609 Comment
  CHSC86868  Scrophularia californica B. Castro 2003-4-10 1420 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. Cutbank of dirt road. 131 Comment
  UC71646  Scrophularia californica Miss Alice King 1905-1 Colusa College City Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD66954  Scutellaria californica Ellen Dean; Davis Botanical Society 2008-5-31 4998 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  UCD81728  Scutellaria siphocampyloides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5730 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  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
  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
  POM174569  Senecio eurycephalus Roxana S. Ferris 1926-4-23 6454 Colusa Stonyford Comment
  UCD21584  Senecio flaccidus var. douglasii Craig D. Thomsen 2002-11-7 s. n. Colusa N. of Wilbur Hot Springs between Hot Springs gate and hotel. Confluence of Bear and Sulfur Creeks. Comment
  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
  HSC101845  Setaria parviflora J. P. Smith, J. O. Sawyer 2007-9-2 12411 Colusa River Rd. N of Colusa 20 Comment
  CHSC94470  Setaria viridis Lowell Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725026  Setaria viridis L. Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD81249  Sherardia arvensis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5413 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located south of Brophy Canyon. 375 Comment
  HSC87050  Sidalcea diploscypha L. Blackford, S. Branch, D. Malm 1988-4-16 67 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  SFV17852  Sidalcea diploscypha J. M. Tucker 1980-5-3 4443 Colusa Bear Valley. 4.3 miles south of junction of Brim Road and Bear Valley Road. 396 Comment
  UCD14553  Sidalcea diploscypha John M. Tucker 1980-5-3 4443 Colusa California, Colusa Co.; Bear Valley, 4.3 mi. south of junction of Brim Road and Bear Valley Road; Comment
  UCD116642  Sidalcea diploscypha Nancy Vucinich 1978-5-6 20 Colusa 2.5 miles north of the junction of Highway 16 and Highway 20. 365 Comment
  UCD23423  Sidalcea diploscypha David Rhode 1977-4-30 22 Colusa Bear Valley, 2.1 miles north of Wilbur Springs. Dry gravel, west facing slope in sparse valley grassland pasture. Comment
  UCD23424  Sidalcea diploscypha Robert E. Rolley 1977-5-8 21 Colusa Annual erect herb, 20-40 cm tall. Stems covered with many long hairs, upper leaves gray green deeply palmately lobed, lower leaves already dry. Flowers in few flowered heads, lavender, white at base. Grassy, south facing slope, full sun, heavy clay loam. 0.3 miles NNW on Bear Valley Rd. from Hwy 20. Comment
  JEPS50051  Sidalcea hartwegii W. L. Jepson 1932-5-8 16278 Colusa Lodoga Lodoga (w Colusa Co.) Comment
  UCD163840  Sidalcea hartwegii Craig D. Thomsen 2001-4-12 2470 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS116996  Sidalcea keckii David Gowen 2008-5-24 922 Colusa Sites Ladoga Rd., northeast of Ladoga, ca. 1.9 miles southwest of Grapevine Pass. Comment
  UC583287  Silene californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi nw Rumsey; nw of Rumsey 304 Comment
  POM253020  Silene californica A. A. Heller 1937-4-24 15351 Colusa On Highway #20, 15 miles west of Williams. Comment
  RSA477841  Silene californica D. A. Young 1969-5-4 P- 377 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 Comment
  UCD111674  Silene campanulata Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  CDA12223  Silene campanulata subsp. glandulosa G. F. Hrusa 1993-5-2 10861 Colusa Frenzel Creek Research Natural Area; Mid-canyon of Frenzel Creek, tributary of Little Stony Creek. Comment
  UCD56688  Silene campanulata subsp. glandulosa Gordon Harrington 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 586 Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  UCR37946  Silene gallica Brian Kearney, Mike Malamus, Peter Williams 1984-4-29 10 Colusa Bear Valley Road, 2 mi. north of Hwy 20. 366 Comment
  CHSC79487  Silene laciniata subsp. californica B. Castro; L. P. Janeway 2000-5-3 1125 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  JEPS124241  Silene laciniata subsp. californica Lowell Ahart 2015-4-1 19992 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
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
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Aug 11 2014
  UCD98993  Silene laciniata subsp. californica Cherry Kline 1964-5-2 51 Colusa Bear Creek Canyon, 3 miles north of the Wilbur Springs turnoff on State Highway 20. Comment
  UCD99009  Silene laciniata subsp. californica Kathleen A. Robson 1981-5-25 41 Colusa from Stonyfield, take Fouts Spring Road 8 miles west to Fouts Springs, continue 1 mile West along roadside. 579 Comment
  UCD163877  Silene lemmonii Craig D. Thomsen 2000-4-12 2525 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  HSC72140  Sinapis arvensis J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9572 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  RSA783303  Sinapis arvensis R. R. Halse 2010-3-20 7826 Colusa Along State Hwy 20 ca. 5.4 miles W of Colusa (junction of State Hwys 20 & 45). 17 Comment
  UCR206872  Sinapis arvensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14317 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  UC10834  Sisymbrium officinale J. Burtt Davy May 1898 4273 Colusa near Willows 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
  UCD138841  Sisyrinchium bellum Clinton C. Schock 1980-5-3 58 Colusa Bear Valley, around 12 miles northwest of Highway 20. 384 Comment
  UCD82502  Sisyrinchium bellum Craig Thomsen; G. Harrington 2009-5-12 2861 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCR139084  Sisyrinchium bellum A. Skelly, G. McCabe, B. Bletcher 1996-5-4 37 Colusa 8.4 mi north of Indian Res. Road, on Walker Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 Comment
  SEINET3992537  Smilacina stellata J. M. Tucker, L. K. Mann 1959-5-30 3529 Colusa Small lake in Mill Valley, ca. 0.25 mi N. W. of Lower Letts Valley, and ca. 4 air miles N. of Goat Mountian Lookout 1219 Comment
  CHSC114061  Solanum parishii Richard R. Halse 2012-3-29 8456 Colusa Along State Hwy. 20 ca. 6.8 miles northeast of its junction with State Hwy16 176 Comment
  HSC42017  Solanum parishii M. A. Baker 1977-4-24 222 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 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
  HSC72773  Solanum parishii Brian H. McMurtry 1979-3-31 1 Colusa N side Salt Canyon Hwy. 20, 11 mi. WSW of Williams 143 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
  CAS-BOT-BC235306  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  UC1100454  Sorghum halepense Herbert L. Mason 1945-9-10 12723 Colusa 1 mi. n. Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Sacramento R. Comment
  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
  UC8724  Spergularia macrotheca var. leucantha J. Burtt Davy May, 1898 4272 Colusa near Willows; near Willows Comment
  CHSC60677  Spergularia marina Vernon H. Oswald 1993-4-14 5265 Colusa S side of the Tour Route just W of Headquarters, Colusa National Wildlife Refuge, SW of Colusa. 18 Comment
  CAS-BOT-BC390767  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  CAS-BOT-BC390768  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 639 Colusa 6 mi. west of Colusa Comment
  CAS-BOT-BC390769  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 637 Colusa 2 mi. so. of Maxwell Comment
  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
  CHSC80392  Stachys ajugoides var. rigida Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  CHSC94290  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13091 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 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
  JEPS75739  Stachys ajugoides var. rigida L. R. Heckard 1974-9-10 3911 Colusa ne slope West Peak; Snow Mt. 2011 Comment
  JEPS104386  Stachys albens Lowell Ahart 2003-7-14 10381 -A Colusa Along a stream, field on the south side of Highway 20, ca 2 mi sw of the intersection of Highway 20 and Bear Valley Rd, ca 21 mi (by road) sw of Williams. 520 Comment
  JEPS120807  Stachys albens Lowell Ahart 2013-10-1 19079 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCD125559  Stachys albens D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley Road. Bear Valley Creek. 370 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
  CDA16112  Stachys rigida G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15241 Colusa North Coast Ranges; Leesville Rd. On E side of main ridge from Bear Valley. 213 Comment
  CHSC61429  Stachys stricta Vernon H. Oswald 1993-8-16 5806 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, W 1/4 of Tracts 44, near the S boundary of the refuge. Growing on N bank of Hunters Creek. 24 Comment
  UCR200673  Stachys stricta Craig D. Thomsen 2006-8-17 2712 Colusa BLM Payne Ranch, c. 30 feet east of Hwy 16, 0.5 mi. south of intersection between Hwy 16 and Hwy 20 300 Comment
  UCD63710  Stachys stricta Craig D. Thomsen 2006-8-17 2712 Colusa BLM Payne Ranch. About 30 feet west of Hwy 16, 0.5 mile south of intersection between Hwy 16 and Hwy 20. 300 Comment
  CAS-BOT-BC374775  Stebbinsoseris heterocarpa Roxana S. Ferris 1917-4-14 570 Colusa 7 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  JEPS80121  Stellaria calycantha L. R. Heckard with J. Hickman 1980-7-1 5277 Colusa ca 10 mi w Stonyford (Snow Mt., cirque between East and West Peaks); Snow Mt. 2042 Comment
  CHSC62885  Stellaria media Vernon H. Oswald 1994-3-14 5991 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, between Cell 1, Tract 38 and Tract 41. Along the side of a levee road. 25 Comment
  CHSC94316  Stephanomeria paniculata Lowell Ahart 2006-8-9 13099 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CHSC94520  Stephanomeria paniculata Lowell Ahart</