Search Results — 2000 specimen records retrieved (1637 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
  IRVC29682  Abies magnifica var. shastensis Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5036 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  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
  CHSC46859  Acer macrophyllum Vernon Oswald 1989-9-12 4007 Colusa Goat Mtn Rd 3.0 mi wsw of Lodoga-Stonyford Rd, ca. 6 mi (air) s of Stonyford. 426 Comment
  POM163502  Acer negundo subsp. 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
  JEPS75746  Achnatherum occidentale subsp. californicum L. R. Heckard 1974-9-11 3945 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  HSC45717  Achyrachaena mollis Sheila Logan 1978-4-22 60 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  POM163442  Achyrachaena mollis Roxana S. Ferris 1926-4-21 s.n. Colusa 3 mi W of Colusa.. Comment
  UCSC001480  Achyrachaena mollis Peter Kamb 1950-1 1691 Colusa Stony ford Comment
  SEINET3245652  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2008-1 14242 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County line (Meridian 7.5') 9 Comment
  UCD64035  Acmispon americanus var. americanus Craig D. Thomsen 2000-6-23 2413 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  UCD63918  Acmispon brachycarpus Craig D. Thomsen 2001-5-24 2508 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection (between Colusa Co. mileposts 2.17 and 2.25). 342 Comment
  UCR261746  Acmispon brachycarpus Ann Howald 2003-6-9 2362 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCD66697  Acmispon denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD67009  Acmispon denticulatus Craig D. Thomsen 2008-5-18 2736 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. Just south of Hwy 20, about 1 mile west of Hwy 16/20 intersection. Above perennial drainage. 365 Comment
  OBI59416  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On rd above and W of Fouts Springs 762 Comment
  UCR261742  Acmispon rubriflorus Ann Howald 2003-6-9 2368 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Hole-in-the-Wall camping area 370 Comment
  UCR261745  Acmispon rubriflorus Ann Howald 2003-6-9 2362 A Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, near Rocky Ridge camping area 424 Comment
  UCR261747  Acmispon rubriflorus Ann Howald 2003-6-9 2369 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd, then c. 0.1 mile east on ranch road 397 Comment
  CHSC79739  Acmispon wrangelianus L. P. Janeway; B. Castro 2000-5-2 6692 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 225 Comment
  HSC72174  Acmispon wrangelianus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9551 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UCD163318  Acmispon wrangelianus Craig D. Thomsen 1997-4-20 1916 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD163704  Acmispon wrangelianus Craig Thomsen 1999-5-10 2016 Colusa Bear Valley. About 9 miles north of Hwy 20. Comment
  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
  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
  CAS-BOT-BC29713  Acroptilon repens F. L. Shanks 1931-10-1 s.n. Colusa Mills Orchard, near Maxwell Comment
  CAS-BOT-BC107  Adenostegia palmata Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-6-17 284 Colusa near College City Comment
  UC205569  Adenostoma fasciculatum H. M. Hall 1919-10-5 Colusa on plains e. of R.R. Hershey Comment
  SEINET10866059  Adenostoma fasciculatum Katherine L. Morris 1973-6-6 Morris 390 Colusa Chaparral woodland and sparse oak, on hwy 20, 0.3 miles e of lake co line Comment
  SEINET3271565 Image available Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14749 Colusa Inner North Coast Ranges; along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  UCR206362  Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14749 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  CDA4027  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
  CDA4028  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  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
  CHSC32211  Ageratina occidentalis James Jokerst 1980-8-7 1062 Colusa North Coast Ranges. Near Snow Mountain (West). Comment
  UCD82115  Agoseris grandiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5643 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  JEPS80139  Agoseris grandiflora var. grandiflora L. R. Heckard with J. Hickman 1980-7-2 5299 Colusa ca 10 mi w, above Summit Spring entrance to Snow Mt trail Stonyford; Snow Mt. 1630 Comment
  UCD64502  Agoseris heterophylla Craig D. Thomsen 2000-3-31 2092 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
  JEPS35661  Agoseris heterophylla var. cryptopleura W. L. Jepson 1932-5-7 16266 Colusa Indian Valley, north of Leesville. 518 Comment
  UCD51802  Agrostis avenacea Beecher Crampton 1963-8-5 6871 Colusa 3/4 mile E of Cortena, Lurline Road. Comment
  UCD162995  Aira caryophyllea Craig D. Thomsen 2000-4-12 2169 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  SEINET3917542  Aira caryophyllea Donald Spalinger 1974-5-4 47 Colusa St. John Mt. quad. North fork Campground on Stony Creek. 1600.; 0 Comment
  UC985647  Alisma lanceolatum Herbert L. Mason and Verne Grant 1946-9-5 13119 Colusa 1.6 mi w Williams (road to Lake County) Comment
  CAS-BOT-BC445318  Alisma lanceolatum Milo S. Baker 1946-9-5 11631 Colusa Along Hiwy. bet. Colusa and Williams Comment
  CAS-BOT-BC445355  Alisma plantago-aquatica Roxana Stinchfield 1916-7-11 469 Colusa Davis tule - Sycamore Slough Comment
  CHSC94417  Alisma triviale Lowell Ahart 2006-8-22 13231 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD137975  Alisma triviale P. B. Kennedy 1925-9-18 s.n. Colusa Cortena, Rice Sta. Comment
  UCD141781  Allium L. K. Mann 1958-5-3 s.n. Colusa about 0.8 mile toward Wilbur Springs from Junction of California Highway #16 and #20. Comment
  UCD57115  Allium Gordon Harrington; Diana Hickson 2007-4-7 0019 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, approx. 1/2 m WNW of Roadkill Cafe. 463 Comment
  UCD82470  Allium Craig Thomsen; G. Harrington 2009-5-12 2847 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 707 Comment
  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
  UCD163212  Allium amplectens Craig D. Thomsen 2000-4-28 2198 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  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
  CAS-BOT-BC459582  Allium amplectens Roxana S. Ferris 1926-4-23 6578 Colusa Stonyford Comment
  UCD141837  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  UCD141843  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
  CHSC71009  Allium falcifolium Vernon Oswald; Lowell Ahart 1998-5-7 9009 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. 633 Comment
  JEPS15563  Allium falcifolium G. Thomas Robbins with L. R. Heckard 1956-7-25 3717 Colusa slope above Dark Hollow Creek (a tributary of Middle Fork Stony Creek) (on s flank of Snow Mt. at lower end of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. 1981 Comment
  JEPS94212  Allium falcifolium Vernon Oswald and Lowell Ahart 1998-5-7 9009 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
  UCD82517  Allium falcifolium Craig Thomsen; G. Harrington 2009-5-12 2875 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  CAS-BOT-BC135887  Allium fimbriatum subsp. purdyi Peter H. Raven 1962-5-31 17908 Colusa State Highway 20, 2.5 miles east of Lake County line. Comment
  CAS-BOT-BC135883  Allium fimbriatum subsp. purdyi M. S. Baker 1937-5-17 8657 Colusa Hiway 20, nr. Lake Co. line. Comment
  HSC48164  Allium fimbriatum var. purdyi Thomas W. Nelson, Jane P. Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  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
  RSA161099  Allium fimbriatum var. purdyi Peter H. Raven 1962-5-31 17908 Colusa Highway 20, 2.5 miles east of Lake County Line Comment
  UC518939  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake county line w Wilbur Springs Comment
  UCD141783  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  CHSC2060  Allium peninsulare D. Smith 1935-5-12 Colusa Stonyford hills. Comment
  SEINET194917  Allium purdyi A. A. Heller 1942-5-29 16484 Colusa 1/2 mile east of the Lake County Line. Comment
  CDA11415  Allium serra G. F. Hrusa, K. van Katwyk 1995-4-22 12136 Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 m. N of Hwy 20. Comment
  CHSC42240  Allium serra Curtis Williges 1986-4-5 20 Colusa Hwy 20, 3 mi e of jct Hwy 16. 335 Comment
  CAS-BOT-BC475543  Allium serra Roxana S. Ferris 1917-4-14 557 Colusa Foothills 7 miles west of Arbuckle Comment
  CAS-BOT-BC475547  Allium serra A. A. Heller 1919-5-10 13112 Colusa Grade east of Leesville in the oak belt on open grassy slopes. Comment
  SEINET3879172  Allium serra D. W. McNeal, David Isle 1991-5-22 3821 Colusa On a steep road bank above Hwy #162, 4.3 mi E of the Stony Creek Bridge N of Elk Creek.; 0 Comment
  UCD141801  Allium serra L. K. Mann 1960-4-10 s.n. Colusa along State Highway #16 at south end of Bear Valley. Comment
  UCD141824  Allium serra M. Yamaguchi; D. Hughes, D. G. Hunt 1965-4-29 s.n. Colusa 6.6 miles south of Lodoga on Leesville-Lodoga Road, on right side of road. Comment
  UC1051499  Allophyllum divaricatum Helen K. Sharsmith 1953-6-19 4280 Colusa 1 mi. n. Trough Springs (on Trough Springs Ridge); Inner N. Coast Ranges, Mendocino Nat'l Forest, Trough Spring 914 Comment
  CAS-BOT-BC230055  Allophyllum gilioides Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 853 Comment
  CHSC62939  Allophyllum gilioides subsp. violaceum Vernon H. Oswald; Lowell Ahart 1994-4-6 6060 Colusa Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford. On slopes bordering Sullivan Creek. 469 Comment
  SEINET14407744  Allophyllum gilioides subsp. violaceum R. R. Halse 2010-3-25 7849 Colusa Along State Hwy 20 in Salt Canyon, ca 10.7 miles SW of its junction with I-5 at Williams. 154 Comment
  SEINET3872990  Allophyllum gilioides subsp. violaceum Richard R. Halse 2010-3-25 7849 Colusa Along State Hwy. 20 ca 10.7 miles southwest of its junction with Interstate Hwy. 5 at Williams; in Salt Canyon.; 0 154 Comment
  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
  JEPS108914  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
  RSA718199  Alnus rhombifolia L. Ahart 2006-8-9 13108 Colusa On north side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 423 Comment
  UCD110026  Alnus rhombifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 128 Comment
  CHSC71667  Alopecurus saccatus Michael A. Wolder 1998-5-12 Colusa Sacramento National Wildlife Refuge Complex. Colusa National Wildlife Refuge south west of Colusa. 16 Comment
  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
  UC727678  Amaranthus californicus Milo S. Baker 1946-9-5 11625 b Colusa 5 mi w Colusa (along hwy towards Williams) Comment
  CDA19687  Ambrosia confertiflora D. Brown 2001-10-17 PDR 024367 Colusa Northern California; Vicinity of Colusa 0 Comment
  CDA32033  Ambrosia psilostachya D. Isle, Rhonda Isle 2007-9-9 1624 Colusa Mendocino National Forest- North Coast Ranges Middle Fork Stony Creek Watershed; Stonyford Park at NW edge of Indian VA Elementary School; about 100 yds SE of Co. Rd 306 Stony Creek Bridge; about 1/4 mile S of Glenn Co. line. 0 Comment
  CHSC101072  Ambrosia psilostachya David W. Isle; Rhonda Isle 2007-9-9 1624 Colusa Stonyford Park at NW edge of Indian VA Elementary School; about 100 yds SE of Co. Rd 306 Stony Creek Bridge; about 1/4 mile S of Glenn Co. line. Comment
  POM50992  Ambrosia psilostachya Roxana Stinchfield 1916-7-8 376 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  CHSC84957  Ammannia coccinea Lowell Ahart 2003-10-23 10673 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
  RSA78613  Ammannia coccinea J. T. Howell 1944-7-18 19837 Colusa 3 miles west of Williams. 30 Comment
  UCD102899  Ammannia coccinea June McCaskill 1954-8-9 358 Colusa Ca. 2 miles E of Princeton and 300 yards S of Glenn County line. Comment
  CHSC25321  Ammi visnaga Hayes; Warner, Schlising 1977-8-23 48 Colusa Along River Rd. on the east side of the Sacramento River, 3.5 mi n Of Colusa. 50 Comment
  JEPS81300  Amsinckia intermedia L. R. Heckard and J. C. Hickman 1982-7-5 5914 Colusa slope below Summit Springs (s side Snow Mountain); Snow Mountain 1524 Comment
  POM287422  Amsinckia intermedia Lyman Benson 1935-3-27 6331 Colusa 6 miles west of Williams. 213 Comment
  SEINET12519076  Amsinckia intermedia Christine Laning 1973-1 108 -14 Colusa 10.0 miles northwest of Rumsey on Route 16, near Yolo/Colusa county line. Comment
  SFV3062  Amsinckia intermedia D. West 1960-4-10 11 Colusa Southern end of Bear Valley, 5 miles northwest of junction of State Highways 16 and 20. 244 Comment
  JEPS102235  Amsinckia lunaris L. P. Janeway 2001-4-18 7024 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 274 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
  UCD63027  Amsinckia lunaris Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4679 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Basin at top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 526 Comment
  UCD80815  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5271 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. Thompson Canyon, W of junction of trail leading to Craig Canyon, north side of Thompson Canyon trail. 363 Comment
  UCR206368  Amsinckia lunaris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14368 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCD160032  Amsinckia lycopsoides Ellen Dean; Craig Thomsen 2015-4-21 8628 Colusa Bear Creek Ranch (previously Payne Ranch) at intersection of highways 16 and 20. Area to the SE of Lynch Canyon on S side of undeveloped road and N of creek. Near western end of Thompson Canyon. 381 Comment
  CAS-BOT-BC537220  Amsinckia menziesii George K. Helmkamp; E. A. Helmkamp 2011-4-1 17116 Colusa Western Sacramento Valley; along Maxwell Road 2.1 mi E of Maxwell, near Delevan Wildlife Refuge 22 Comment
  UCD163216  Amsinckia menziesii Craig D. Thomsen 2000-4-28 2193 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  CHSC101640  Ancistrocarphus filagineus David W. Isle 2002-4-18 1658 Colusa Mendocino National Forest. N of Fouts Springs, N of Chlorinator Building and road to Bathhouse Trailhead. Edge of E-flowing ephemeral drainage. MDB and M. In chamise site burned in 8/8/01 Trough Fire and part of Helicopter Hydromulch Study Plot. 524 Comment
  UC1056275  Ancistrocarphus filagineus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3182 Colusa just w of, (just w of base of grade to Indian Valley (Bartlett Mtn. Rd.)) Bear Valley; Inner North Coast Ranges Comment
  UCD162976  Ancistrocarphus filagineus Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  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
  CHSC89861  Androsace elongata subsp. acuta B. Castro; L. P. Janeway 2001-4-18 1235 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. On low terrace just above riparian corridor paralleling dirt road adja-ent to perennial N-S-trending creek. 274 Comment
  JEPS75850  Anisocarpus scabridus L. R. Heckard 1974-9-10 3900 Colusa se slope East Peak Snow Mt. 2103 Comment
  CAS-BOT-BC69129  Antennaria geyeri G. Thomas Robbins; L. R. Heckard 1956-7-25 3722 Colusa At summit of Snow Mt. West 2145 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
  UCD164035  Anthriscus caucalis Amber Flores 2016-4-9 1 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. 312 Comment
  CHSC110858  Antirrhinum subcordatum David Isle; Rhonda Isle 2013-5-19 2039 Colusa 0.1 mi E of Maxwell Grade Summit; burned SW asp. upper drainage slope N of Sites Lodoga Road. July 2012 Sites Fire Area GPS (CONUS) 10S 0546887e 4356402N. Comment
  UC726114  Antirrhinum subcordatum A. A. Heller 1940-6-7 15717 Colusa ridge e Lodogo Comment
  CHSC110424  Antirrhinum vexillo-calyculatum subsp. breweri David Isle; Rhonda Isle 2012-6-14 1945 Colusa About 2 mi SE of Stonyford; E AspSlope about 250 yds N of E. Park res. S Dam and 100 ft W of shoreline, N of large cusped conglomerate rock with small caves. 390 Comment
  UCD66699  Antirrhinum vexillocalyculatum Craig D. Thomsen 2000-6-23 2406 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD70221  Antirrhinum vexillocalyculatum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  JEPS15536  Antirrhinum vexillocalyculatum subsp. breweri G. Thomas Robbins with L. R. Heckard 1956-7-25 3694 Colusa about 1.5 air mi se Snow Mt. summit (on ridge above Fouts Camp and along trail to Snow Mt, on Lake-Colusa County boundary) 1920 Comment
  CHSC94710  Antirrhinum virga Lowell Ahart 2006-6-15 12792 Colusa On the west side of Forest Road 18N03, about 100 yards north of Mill Creek, near Fouts, Mill Creek Campgrounds, about 5 3/4 miles (air) west-southwest of Stonyford. 500 Comment
  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
  JEPS127575  Antirrhinum virga David Isle 2015-6-20 2157 Colusa North Coast Ranges: ~4 miles W of Stonyford; SE of curve at culvert crossing just E of old dumpsite road junction; uphill ~200' S of 18N01 in 2012 Mill Fire area chaparral. (Gilmore Peak 7.5' Quad.) Comment
  SBBG119809  Antirrhinum virga L. Ahart 2006-6-15 12792 Colusa W side of USFS Rd 18N03, ca. 100 yds N of Mill Crk, near Fouts, Mill Crk Cmpgrds, ca. 5.75 air mi WSW of Stonyford 500 Comment
  JEPS87724  Apiastrum angustifolium Vernon H. Oswald and Lowell Ahart 1994-3-23 6017 Colusa just w of bridge over Sullivan Creek (s of Stonyford, Goat Mountain Road); Goat Mountain Road 505 Comment
  IRVC29688  Apocynum androsaemifolium Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5030 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  UCD82874  Apocynum cannabinum Gordon Harrington 2007-5-31 64 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. 336 Comment
  UCD63730  Arceuthobium campylopodum Craig D. Thomsen 2008-5-23 2739 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.75 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 520 Comment
  SEINET3239841  Arceuthobium occidentale R. L. Mathiasen 2009-1 2009 -21 Colusa 3.2 km E of Summit County line at vista point on St. Rte. 20. 400 Comment
  CHSC83138  Arctostaphylos G. L. Webster 1989-5-6 7700 Colusa Near border with Lake Co., on crest of Walker Ridge, near Cold Springs Mt. Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  CAS-BOT-BC25251  Arctostaphylos canescens subsp. canescens Josh Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 36 Colusa Walker Ridge Rd., 4.8 miles N of junction with Indian Valley Access Rd. 975 Comment
  CDA16131  Arctostaphylos manzanita G. F. Hrusa 1999-2-13 14915 Colusa North Coast Ranges; along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  CHSC31970  Arctostaphylos manzanita L. Ahart 1976-2-14 1002 Colusa Ca. 3 mi W of sites. 365 Comment
  SD53207  Arctostaphylos manzanita Darley F. Howe 1962-5-19 3285 Colusa 11 miles west of Williams on Highway 20. 149 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
  UC1388337  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa road between Upper Letts Valley and Lower Letts Valley (w Colusa Co.); North Coast Ranges 1219 Comment
  CAS-BOT-BC24376  Arctostaphylos manzanita subsp. manzanita Walter Knight; Irja Knight 1964-4-11 814 Colusa Between Lewisville and Ladoga. Comment
  CAS-BOT-BC24377  Arctostaphylos manzanita subsp. manzanita Roxana Stinchfield 1916-6-18 308 Colusa The Timber - near College City. Comment
  CAS-BOT-BC24423  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-9 s.n. Colusa Hershey, se. Colusa Co. Comment
  CAS-BOT-BC24425  Arctostaphylos manzanita subsp. manzanita C. Hart Merriam 1919-9-15 s.n. Colusa Stony Ford, nw. Colusa Co. Comment
  HSC67142  Arctostaphylos viscida J. P. Smith, Thomas W. Nelson 1976-4-14 8586 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD52647  Arctostaphylos viscida Roman Gankin 1958-4-26 292 Colusa In Leesville-Bartlett Springs road, ca. 2 miles west of junction of this road and Leesville-Wilbur Springs road, near Colusa-Lake County line, California. 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
  UCSC010367  Arctostaphylos viscida subsp. pulchella Dylan M. Neubauer, Tim Forsell 2016-3-30 591 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  SBBG114894  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Colusa Brim Rd 396 Comment
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  SBBG114895  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
  SBBG29992  Argemone munita L. Constance 1939-5-14 2490 Colusa 1 mi E of Mill Crk Ranger Station 548 Comment
  CAS-BOT-BC401743  Argemone munita subsp. rotundata L. Constance 1939-5-14 2490 Colusa 1 mile east of Mill Creek Ranger Station, Inner North Coast Ranges 548 Comment
  CAS-BOT-BC400400  Aristolochia californica Roxana S. Ferris 1917-4-15 615 Colusa Sycamore Slough Comment
  POM165698  Aristolochia californica Roxana S. Ferris 1917-4-15 s.n. Colusa Sycamore Slough Comment
  UC1585867  Arnica discoidea Barbara Ertter 1989-7-1 8594 Colusa 12 airmi wsw, (rd to Goat Mt Lookout 2.2 mi s of Rt M-10, head of S Fk Stony Cr Stonyford; South Fork Stony Creek 1500 Comment
  RSA537715  Arnica discoidea Barbara Ertter 1989-7-1 8594 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  JEPS104400  Artemisia douglasiana Lowell Ahart 2003-10-23 10660 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
  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
  HSC45677  Asclepias cordifolia Stephen Plant 1978-4-22 215 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1299578  Asclepias cordifolia Freed W. Hoffman 1947-6-19 1671 Colusa Cooks Springs North Coast Ranges Comment
  CAS-BOT-BC222853  Asclepias solanoana G. L. Stebbins 1966-6-6 6432 Colusa Lovelady Ridge, south of South Fork, Stony Creek, 6.5 miles south of Stony ford [Stonyford] 609 Comment
  HSC72214  Asclepias solanoana Thomas W. Nelson, Jane P. Nelson 1980-6-24 5876 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  UC1051712  Asclepias speciosa Helen K. Sharsmith 1953-6-19 4262 Colusa near confluence of North and Middle Forks of Stoney Creek (Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest 548 Comment
  UCD58164  Asclepias speciosa Gordon Harrington 2007-5-15 54 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  RSA724830  Aster subulatus var. ligulatus L. Ahart 2006-9-26 13343 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  SEINET12318320  Asteraceae J. A. LeFurgey 1978-1 4 Colusa ca 0.3 mi W of jct of hwy 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 322 Comment
  CDA26624  Astragalus breweri T. C. Fuller 1958-4-17 Colusa 1 mile south of Lodoga. 0 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
  CAS-BOT-BC366914  Astragalus gambelianus Richard R. Halse 2013-3-27 8765 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles E of the junction of State Hwys. 20 and 53 558 Comment
  HSC72171  Astragalus gambelianus Thomas W. Nelson, Jane P. Nelson 1978-4-2 9548 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  UC83408  Astragalus gambelianus Katharine Brandegee april 1889 Colusa Colusa Junction Comment
  SEINET4673433  Astragalus rattanii Richard R. Halse 2013-3-27 8764 Colusa Along State Hwy. 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Hwy. 20 and 53.; 0 558 Comment
  CAS-BOT-BC193115  Astragalus rattanii var. jepsonianus Alice Eastwood; John Thomas Howell 1938-5-16 5634 Colusa Lake - Colusa Co. line on road to Williams Comment
  CAS-BOT-BC193116  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
  UC2029550  Astragalus rattanii var. jepsonianus Richard R. Halse 2013-3-27 8764 Colusa Along State Highway 20 just east of the Colusa/Lake County Line, ca. 14.6 miles east of the junction of State Highway 20 and 53 Comment
  UCD163317  Astragalus rattanii var. jepsonianus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. 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
  UCR212339  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2002-2-27 2576 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  SEINET4680474  Astragalus rattanii var. jepsonianus D. W. McNeal 1988-3-31 3237 Colusa On a hillside above Bear Valley Rd., 0.6 mi NW of Hwy #20.; 0 Comment
  CAS-BOT-BC17401  Athysanus pusillus Roxana S. Ferris 1917-4-14 551 Colusa Foothills 7 miles west of Arbuckle. Arbuckle-Rumsey Road. Comment
  CDA11922  Athysanus pusillus G. F. Hrusa 1989-5-7 6088 Colusa North Coast Biodiversity Arena; Cedar Mtn. Rd. along Little Stony Creek, approx. 4 miles above intersection with Stonyford-Lodoga Rd. Comment
  CHSC87153  Athysanus pusillus Jenny Marr; Beth Hendrickson, Jean Witzman, Natalie Wight 1999-2-25 Colusa Vicinity of Antelope Valley, Antelope Creek, and Sites. 152 Comment
  UC638659  Athysanus pusillus Ethel Crum 1938-5-8 2024 Colusa 3 mi n of Leesville; Inner North Coast Range Comment
  UCD63023  Athysanus unilateralis Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4675 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  UCR205145  Atriplex argentea George K. Helmkamp, E. A. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  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
  CHSC107933  Atriplex depressa B. Castro; L. Janeway 2011-7-9 1894 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 in very small patches along NW edges of marsh.. 49 Comment
  CHSC61039  Atriplex depressa Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5703 Colusa Colusa National Wildlife Refuge. W side of Pool 3 on the S end of the refuge near Ohm Rd., ca. 2 mi N of Ware Rd., ca. 5 mi S of Colusa. 15 Comment
  JEPS90586  Atriplex depressa Dean W. Taylor 1993-7-9 13849 Colusa along Ohm Rd. 1 mi n Ware Road (se corner of Refuge); Sacramento Valley, Colusa National Wildlife Refuge 22 Comment
  CHSC81258  Atriplex fruticulosa Caroline Warren; Beth Hendrickson 1999-6-7 Colusa Vicinity of Funks Creek and Logan Ridge. 91 Comment
  CHSC80184  Atriplex joaquinana B. Castro; G. Kuenster 2000-7-19 1210 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow ephmeral stream channel draining eastward out of the hills east of Golden Gate. 54 Comment
  UCD163857  Atriplex joaquinana Craig D. Thomsen 2001-4-26 2484 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC108070  Atriplex micrantha B. Castro; Dave Boegner 2011-9-1 1911 Colusa Sacramento Valley. Larkins Childrens Rancho. 10 air mi NW of Colusa, 3 mi W of the Sacramento River and 600 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Common around outer western edges of managed +- saline wetland of Gunnersfeld Ranch duck hunting club, among patches of tules and cattails. On and just below berms. 17 Comment
  JEPS118678  Atriplex micrantha B. Castro with Dave Bogener 2011-9-1 1911 Colusa Sacramento Valley. 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. Moulton Weir 7.5' quad. Comment
  CHSC59712  Atriplex persistens K. R. Stern 1980-6-30 6646 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD163663  Atriplex prostrata Craig Thomsen 1998-6-10 1961 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS90603  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Road) 39 Comment
  JEPS90638  Atriplex rosea Dean W. Taylor 1989-8-4 10422 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Rd., along ditchbank) 39 Comment
  UC40790  Atriplex semibaccata J. Burtt Davy May 1898 4287 Colusa Maxwell Comment
  UC217003  Atriplex serenana var. serenana H. M. Hall 1920-7-12 11011 Colusa 5 mi e Maxwell; e of Maxwell Comment
  HSC45723  Avena barbata Catherine Chin 1978-4-22 27 Colusa Bear Valley Rd., 1.5 miles from its junction with State Rte. 20 412 Comment
  SEINET3919645  Avena barbata Patricia Shesgreen 1978-4-22 33 Colusa Wilbur Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  HSC66008  Avena fatua Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 43 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UCD57660  Avena fatua Hildegarde Durkin; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. North side of Thompson Creek. Side of trail. 373 Comment
  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
  CAS-BOT-BC98202  Baccharis salicifolia Alice Eastwood 1921-4-11 10231 Colusa Colusa Comment
  UCD57629  Baccharis salicifolia Michele Lanctot; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. In the middle of a creek bed. 361 Comment
  HSC41860  Balsamorhiza macrolepis K. Irwin 1977-4-24 299 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  CAS-BOT-BC100067  Balsamorhiza macrolepis B. Castro; B. Corbin; K. Earll; L. Hanson; D. Isle; L. P. Janeway 1995-4-28 564 Colusa Ca 18 air mi due W of Williams, on Walker Ridge just W of Walker Ridge Rd, ca 0.5 mi S of jcn Bartlett Springs Rd and 716 Comment
  UCD82368  Balsamorhiza macrolepis Robin McMaster 1973-4-15 338 Colusa Bartlett Springs. Comment
  CHSC70963  Balsamorhiza macrolepis var. macrolepis Vernon Oswald; Lowell Ahart 1998-5-7 9010 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat road. 633 Comment
  CHSC61040  Bassia hyssopifolia Vernon H. Oswald; Mike Wolder, Joe Silveira 1993-7-26 5699 Colusa Colusa National Wildlife Refuge. SE corner of Tract 21 on the S side of the refuge near Ohm Rd., ca. 1 mi N of Ware Rd., ca. 6 mi S of Colusa. 15 Comment
  CHSC69476  Bassia hyssopifolia James D. Jokerst 1988-8-23 3041 Colusa Colusa National Wildlife Refuge S of Willows, in Pond 3, E and adjacent to Ohm Rd. in southern-most cell E of the road. Comment
  UC1191425  Bassia hyssopifolia Herbert L. Mason 1946-8-6 12958 Colusa pond on Colusa-Marysville Highway four mi s Colusa (w side of Sacramento River); w side of Sacramento River Comment
  UCD97560  Bassia hyssopifolia P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. 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
  JEPS104404  Bergia texana Lowell Ahart 2003-10-23 10670 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  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
  RSA724819  Bidens frondosa L. Ahart 2006-9-26 13344 Colusa South side of the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 Comment
  UC1192172  Bidens frondosa Malcolm A. Nobs and S. Galen Smith 1949-9-9 1879 Colusa 3 mi w of Williams Comment
  UCD129569  Bidens frondosa C. F. Dunshee 1922-9-2 13 Colusa Cortena. Comment
  JEPS73458  Boechera platysperma L. R. Heckard 1972-7-8 3062 Colusa saddle between East Peak and West Peak; Snow Mt. 1981 Comment
  JEPS73484  Boechera repanda L. R. Heckard 1972-7-9 3095 Colusa se slope Snow Mt. East Peak; Snow Mt. 2072 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
  CHSC96369  Boehmeria cylindrica D. Koenig; L. Bateman 2006-10-13 Colusa Sacramento Valley. By a slough along the west side of the Sacramento River, about 0.5 mi south-southeast of Stegeman. 21 Comment
  RSA0105548  Boehmeria cylindrica B. Castro, Tom Boullion 2009-9-29 1800 G-2 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  POM262504  Boisduvalia densiflora Milo S. Baker 1941-7-26 10132 Colusa Bear Valley along road. Stonyford to Williams highway Comment
  RSA0046899  Bolboschoenus glaucus Richard Carter 2006-7-31 17122 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45. Comment
  UC1100921  Bolboschoenus maritimus Herbert L. Mason, Verne Grant 1946-8-13 13013 Colusa on Williams highway by bridge two mi w Colusa (Butte Sink); , w of Colusa Comment
  CAS-BOT-BC31370  Bolboschoenus maritimus Roxana S. Ferris 1926-4-22 6283 Colusa Roadside ditch 3 miles west of Colusa. Comment
  UCD140020  Bolboschoenus maritimus subsp. paludosus C. F. Dunshee 1922-7-28 24 Colusa Cortina. Comment
  JEPS80460  Botrychium crenulatum Alice Q. Howard 1972-7-10 2 Colusa mossy spring area crossing trail from Fouts Camp to Box Springs (highest of 2 such areas on n side of ridge separating Trout and Paradise Creeks); Snow Mt. 1676 Comment
  CAS-BOT-BC418408  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCR206291  Brassica juncea George K. Helmkamp, E. A. Helmkamp 2009-5-20 14737 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  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
  RSA718047  Brickellia californica L. Ahart 2006-8-9 13110 Colusa On the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of stonyford. 422 Comment
  IRVC29685  Brickellia grandiflora Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5033 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
  CAS-BOT-BC127866  Brickellia greenei Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5034 Colusa Southern Northern Inner Coast Ranges: Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. 1989 Comment
  SEINET198872  Brodiaea capitata J. A. Riegel 1954-3-12 1 Colusa Above Cache Creek 6.8 miles northwest of Rumsey. Comment
  CHSC89838  Brodiaea elegans subsp. elegans B. Castro; L. Janeway 2001-5-10 1248 A Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek, just down from the blue oak-grassland edge. 396 Comment
  UC1051716  Brodiaea elegans subsp. elegans Helen K. Sharsmith 1953-6-19 4268 Colusa near confluence of North and Middle Forks of Stoney Creek; Inner North Coast Ranges, Mendocino National Forest, Red Bri 548 Comment
  JEPS110141  Bromus arenarius Lowell Ahart 2006-8-22 13216 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  UCD37188  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa Colusa County, 10.1 miles southeast of Leesville, east of foothills known as Three Sisters. Comment
  UCR119114  Bromus arenarius Beecher Crampton 1958-4-21 4733 Colusa Inner North Coast Ranges, 12 miles northwest of Rumsey, along Highway 16. 381 Comment
  UCD58711  Bromus hordeaceus Beecher Crampton 1962-4-17 6222 Colusa 3.3 miles north of College City. Comment
  UCD84558  Bromus hordeaceus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6083 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  SEINET10514562  Bromus hordeaceus Roxana S. Ferris 1917-4-12 Ferris 527 Colusa 4 miles E of Williams. Alkali Plains. Comment
  UCD58941  Bromus laevipes R. Tofsrud 1948-7-1 s.n. Colusa Colusa Co. 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
  UCD66445  Bromus madritensis subsp. rubens Craig D. Thomsen 2000-4-28 2214 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
  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
  CAS-BOT-BC273299  Cacaliopsis nardosmia Volney Rattan 1884-6-1 s.n. Colusa Coast Mts. North of San Francisco Bay 1524 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
  RSA783301  Calandrinia ciliata R. R. Halse 2010-3-20 7825 Colusa Along State Hwy 45 ca. 10 miles N of Colusa (junction of State Hwys 45 & 20). 22 Comment
  UCD64251  Calandrinia ciliata Craig D. Thomsen 2000-3-31 2053 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
  HSC62784  Calandrinia ciliata Thomas Wood 1979-4-14 111 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  HSC72115  Calandrinia ciliata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9530 Colusa Bear Valley Rd., 5 mi. from its junction with Hwy. 20 390 Comment
  UCD159532  Calendula officinalis D. S. Park 2011-4-11 280 Colusa Disturbed agricultural field off Boles Rd. Comment
  CHSC49642  Calochortus amabilis Vernon Oswald 1986-5-12 2007 Colusa Brim Rd, (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  UCD139472  Calochortus amabilis K. Esau 1934-5-6 s.n. Colusa West of Williams, Ukiah-Tahoe Highway. Comment
  JEPS61681  Calochortus luteus W. L. Jepson 1920-5-23 8969 Colusa 2-3 mi sw Leewville (at foot of Bartlett grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  UC1733772  Calochortus luteus Kay H. Beach 1940-5-16 659 Colusa Colusa and Lake county line 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
  CAS-BOT-BC491930  Calochortus luteus J. Clausen 1935-5-20 1011 Colusa 18 miles west of Williams on Bartlett Springs road Comment
  UCD139535  Calochortus luteus Grady L. Webster 1977-5-15 7679 Colusa Bear Creek, ca. 0.5 mile west of junction of Wilbur Springs Road and Rtw. 20. 350 Comment
  CHSC28483  Calochortus splendens Timothy Spira; Robert Schlising 1978-5-13 3247 Colusa Ca. 0.5 mi NW jct Hwy 20 and Bear Valley (=Wilber Springs) Road, along latter. Comment
  CHSC79620  Calochortus splendens G. F. Hrusa 1998-6-19 14612 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10 S, 05356 N, 43478 E. 485 Comment
  JEPS120967  Calochortus splendens Lowell Ahart 2013-5-1 18683 Colusa On the N of the wash and 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
  UC1562598  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UC1051717  Calochortus superbus Helen K. Sharsmith 1953-6-19 4269 Colusa near North and Middle Forks of Stony Creek confluence; Inner North Coast Ranges, Mendocino National Forest 548 Comment
  UC1051690  Calochortus tolmiei Helen K. Sharsmith 1953-6-19 4289 Colusa Old Mill Campground, Trough Springs Ridge Inner North Coast Ranges, Mendocino National Forest 1219 Comment
  CHSC53987  Calochortus uniflorus Vernon H. Oswald 1991-4-21 4523 Colusa Bear Valley Rd in Bear Valley, 4.6 mi south of Brim Rd (Bartlett Springs Rd), west of Williams. 417 Comment
  HSC45509  Calochortus uniflorus M. Alcasas 1978-4-23 59 Colusa Bear Valley Rd., 4.7 mi. from Bartlett Springs Rd. 457 Comment
  UCD139597  Calochortus uniflorus Clinton C. Shock 1980-5-3 59 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  CHSC79447  Calycadenia pauciflora G. F. Hrusa 1998-6-19 14595 Colusa the North Coast Ranges. Small colony on open grassy flat within chaparral/Quercus douglasii woodland. Along Little Stony Creek, on Goat Mtn. Rd. ~ 1/2 km. W of intersection with Lodoga-Stonyford Rd. UTM: 10S, 05401N, 43499E 400 Comment
  RSA0118882  Calycadenia pauciflora Lowell Ahart 2013-10-1 19069 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD63726  Calycadenia pauciflora Craig D. Thomsen 2008-5-23 2737 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. 0.5 mile south of Hwy 20 (south of Destanella Flat), about 2.5 miles west of Hwy 16. 542 Comment
  CAS-BOT-BC270744  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles E of Walker Ridge Road on Deadshot Road, Deadshot Flat 731 Comment
  CAS-BOT-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-BC270755  Calycadenia pauciflora Alice Eastwood 1919-6-8 13230 Colusa Near Ladoga Comment
  CAS-BOT-BC270756  Calycadenia pauciflora H. M. Hall 1930-10-3 12936 Colusa 2 miles S of Stoneyford Comment
  RSA255526  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2 miles southwest of Leesville on road to Bartlett 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
  UC1876259  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 mi S of Stoneyford on road to Lodoga. 365 Comment
  UCD129835  Calycadenia pauciflora Gerald D. Carr 1972-7-29 717 Colusa 8.7 miles north of Highway 20 on Bear Valley Road, Bear Creek. Comment
  UCD129837  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile east of Lake County line on Bartlett Springs Road. 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
  UCD129895  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 miles north of Yolo County line Hwy 16. Comment
  UCD63711  Calycanthus occidentalis Craig D. Thomsen 2008-3-20 2713 Colusa BLM Payne Ranch. South of Hwy 20, 0.5 mile south of intersection of Hwy 16 and Hwy 20 (Colusa Co. milepost 2.63). Approximately 200 meters upstream from where UTM data point was taken. 500 Comment
  UCD67591  Calycanthus occidentalis Charles Martin 1986-5-17 29 Colusa Along Fouts Spring Rd., 2.8 miles W of Stonyford, along roadside. Growing along small stream, soil dry. Large shrub, ca. 10 ft tall, flowers large, reddish. Comment
  UCD82572  Calycanthus occidentalis Craig Thomsen 2008-6-12 2763 Colusa Walker Ridge, Elgin Mine area. Comment
  CHSC70976  Calystegia collina subsp. oxyphylla Vernon Oswald; Lowell Ahart 1998-5-7 9000 Colusa Barlett Springs Rod. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  JEPS94202  Calystegia collina subsp. oxyphylla Vernon Oswald and Lowell Ahart 1998-5-7 9000 Colusa Bartlett Springs Road 2.1 mi w of Bear Valley Road (0.8 mi e of Sawtelle Valley and Grapevine Flat Roads); Bartlett Springs Road 524 Comment
  RSA800324  Calystegia collina subsp. oxyphylla Sandra M. Namoff, Eric R. Carter 2013-6-16 79 Colusa North of Hwy. 20 take Bear Valley Rd to Brim Rd, population is 0.2 miles NE of intersection of Brim Rd and Bartlett Springs Rd. 648 Comment
  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
  UC1614405  Camissonia Charles M. Belshaw 1937-4-25 2831 Colusa Inner North Coast Range, Cooks Springs, Devils Ridge Devils Ridge; Inner North Coast Range, Cooks Springs, Devils Ridge Comment
  POM271975  Camissonia graciliflora Lyman Benson 1935-3-27 6328 Colusa 8 miles E of Lake County line, inner N coast mt. range, Sacramento River watershed 305 Comment
  JEPS85535  Camissoniopsis hirtella L. R. Heckard 1969-5-28 2231 A Colusa near junction of Stonyford-Fouts Spring Rd. and Spring Ridge Rd. (1.5 mi ne of Fouts Spring) 670 Comment
  CDA38025  Camissoniopsis hirtella Vernon H. Oswald & Lowell Ahart 1998-5-7 9004 Colusa Bartlett Springs Road, 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  UCD82382  Camissoniopsis intermedia Craig Thomsen; G. Harrington 2009-5-12 2823 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  CHSC112316  Campanula griffinii Lowell Ahart 2013-5-1 18690 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
  UCD56906  Capsella bursa-pastoris Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3509 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  UCD64045  Capsella bursa-pastoris Craig D. Thomsen 2000-3-8 2037 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD164043  Cardamine hirsuta Richard Philbrook 2016-4-9 1 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. 312 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
  CDA30193  Cardaria chalepensis D. Isle 2007-4-13 1633 Colusa East of Maxwell ~ 1 mile; south of Maxwell Road and East of Lyons Road in ditch between rice fields east of William Dirk s shop. Comment
  CHSC79446  Carduus pycnocephalus B. Castro 2000-5-2 1112 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 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-BC19165  Carex barbarae Roxana S. Ferris 1926-4-22 6315 Colusa Near Sycamore. Comment
  JEPS80868  Carex bolanderi L. R. Heckard and J. C. Hickman 1981-7-31 5796 Colusa Dark Hollow Creek, E side of Snow Mountain 1584 Comment
  UC1563912  Carex bolanderi Barbara Ertter 1989-7-1 8607 Colusa road to Goat Mt. Lookout 1.7 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd.) (at head of S Fk Stony Creek, ca. 12 air mi wsw of Stonyford); S. Fk. Stony Creek 1463 Comment
  JEPS80866  Carex hoodii L. R. Heckard and J. C. Hickman 1981-7-31 5778 Colusa near Fouts Springs Overlook (e side of Snow Mt.); Snow Mt. 1798 Comment
  CAS-BOT-BC35776  Carex jonesii L. R. Heckard 1974-9-10 3913 Colusa Snow Mt.;northeast slope of West Peak 2072 Comment
  CHSC76352  Carex klamathensis L. P. Janeway; B. Castro 1999-7-5 6497 Colusa At Bear Wallow Spring; on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. 1045 Comment
  CAS-BOT-BC31226  Carex lenticularis var. impressa L. R. Heckard 1972-7-8 3059 Colusa Upper reaches of Dark Hollow Creek in saddle between East and West Peaks of Snow Mt. 1981 Comment
  JEPS83819  Carex lenticularis var. impressa L. R. Heckard and J. Hickman 1980-9-16 5461 Colusa cirque area between peaks, ne slope of West Peak, Snow Mt. West Peak; Snow Mt., West Peak 2011 Comment
  JEPS75121  Carex luzulina var. luzulina L. R. Heckard 1972-7-10 3113 Colusa 1859 Comment
  CHSC85983  Carex pachystachya L. P. Janeway 2003-7-19 7907 Colusa High Cascade Range. Along the south edge of Little Willow Lake. Just above high water line. 1831 Comment
  JEPS80867  Carex pachystachya L. R. Heckard and J. C. Hickman 1981-7-31 5795 Colusa Dark Hollow Creek, e side of Snow Mt. Snow Mt., Dark Hollow Creek 1584 Comment
  CAS-BOT-BC118347  Carex praegracilis Roxana S. Ferris 1917-4-19 718 Colusa Marshy ground in oak grove, Sacramento River near Sycamore Slough. Comment
  UCD163855  Carex praegracilis Craig D. Thomsen 2001-4-12 2472 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD63129  Carex praegracilis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4959 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Meadow to the east of Destinella Flat, ca. 3 rd miles west of the junction with Hwy 16 on the south side of Hwy 20. 526 Comment
  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
  CHSC94852  Carex serratodens Lowell Ahart 2006-6-11 12669 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  UCD57291  Carex serratodens Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3662 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 319 Comment
  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
  JEPS80865  Carex subfusca L. R. Heckard and J. C. Hickman 1981-7-30 5771 Colusa along Trout Creek, se side of Snow Mt. Snow Mt., Trout Creek 1600 Comment
  UCD23340  Castilleja A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Comment
  CHSC89621  Castilleja affinis subsp. affinis Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 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
  CHSC1709  Castilleja applegatei subsp. martinii V. Holt 1946-4-18 Colusa Cache Creek. Comment
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Mar 2 2015
  CHSC88871  Castilleja applegatei subsp. martinii Christine Hantelman 2000-4-1 46 Colusa At side of Bear Valley Road. 365 Comment
  UCD13389  Castilleja applegatei subsp. martinii Steve Daniel 1986-4-13 86 -6 Colusa Colusa Co., 3.1 miles west of Rumsey on Hwy 16. N. facing slope. Comment
  JEPS73456  Castilleja applegatei subsp. pinetorum L. R. Heckard 1972-7-8 3058 Colusa Dark Hollow Creek, upper reaches, in saddle between East and West Peaks of Snow Mountain Snow Mountain 1981 Comment
  CHSC27516  Castilleja attenuata Michael F. Henetz 1978-4-15 6 Colusa Ca. 150 m s of Hwy 20, ca. .5 km w of Williams. S central border of Section 36. 322 Comment
  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
  SBBG128982  Castilleja attenuata G. K. Helmkamp, E. A. Helmkamp 2011-4-1 17122 Colusa Antelope Valley, along Maxwell-Sites Rd, 1.8 mi SE of Sites 77 Comment
  UCD163675  Castilleja attenuata Craig Thomsen 1999-4-15 1976 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  UCD122333  Castilleja attenuata Kim E. Steiner 1978-4-29 194 Colusa Walker Ridge Rd., 1.5 mi N of State Hwy 20. 777 Comment
  SEINET13772640  Castilleja exserta M. J. Williams 1967-5-7 s.n. Colusa Bear Valley. 396 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
  UCR37943  Castilleja exserta Mike Malamus, P. Williams, Brian Kearney 1984-4-29 70 Colusa Bear Valley Road 2 mi north of Hwy 20 366 Comment
  UCD82329  Castilleja exserta Robin McMaster 1973-4-15 320 Colusa 10 mi NW of Rumsey. Comment
  UCD64254  Castilleja exserta subsp. exserta Craig D. Thomsen 2000-3-31 2055 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC27852  Castilleja exserta subsp. latifolia Phil Bulmert 1978-4-8 2 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
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Apr 23 2020
  HSC87084  Castilleja foliolosa L. Blackford, S. Branch, D. Malm 1988-4-16 68 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  RSA0115084  Castilleja foliolosa Lowell A. Ahart, John Dittes, Josephine Guardino 2013-4-26 18642 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  SEINET14045906  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
  SEINET3873225  Castilleja foliolosa Richard R. Halse 2011-3-25 8160 Colusa Along State Hwy. 20 just east of the Lake County Line; ca 14.6 miles east of its junction with State Hwy. 53.; 0 558 Comment
  HSC97523  Castilleja foliolosa Maria-Elena Heizen 2001-4-21 25 Colusa Walker Ridge 671 Comment
  JEPS82554  Castilleja miniata L. R. Heckard 1983-7-27 6101 Colusa ca 2 mi w Stonyford road; Little Stony Creek 411 Comment
  CDA11256  Castilleja miniata subsp. miniata G. F. Hrusa 1994-11-7 11991 Colusa North Coast Biodiversity Arena; Frenzel Creek Research Natural Area, USFS. on banks of Frenzel Creek, a tributary of Little Stony Creek, approx. 2 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  UC198199  Castilleja minor subsp. spiralis Katharine Brandegee 1910-8-10 Colusa Epperson's Grade; sw Colusa Co. Comment
  UCD163307  Castilleja rubicundula Craig D. Thomsen 1997-4-7 1897 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UC725631  Castilleja rubicundula subsp. lithospermoides A. A. Heller 1942-5-29 16481 Colusa 0.5 mi w State Hwy. 20 junction with Highway 16 Comment
  JEPS11156  Castilleja rubicundula subsp. rubicundula W. L. Jepson 1932-5-8 16284 Colusa Stonyford; w Colusa County 365 Comment
  JEPS33902  Castilleja rubicundula subsp. rubicundula D. E. Breedlove 1963-5-30 5183 Colusa 17 mi e Bartlett Springs (on floor of Bear Valley); Bear Valley Comment
  JEPS44112  Castilleja rubicundula subsp. rubicundula Barrie Stanfield 1966-4-16 27 Colusa 5 mi n Wilbur Springs turnoff (Bear Valley bottomlands); Bear Valley 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
  UCD57296  Castilleja rubicundula subsp. rubicundula Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3667 Colusa BLM Payne Ranch. Near origin of Craig Canyon. Close to Thompson Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. 349 Comment
  CDA11400  Castilleja tenuis G. F. Hrusa, K. van Katwyk 1995-4-22 12120 Colusa Inner North Coast Ranges; flat on Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  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
  RSA0118787  Caulanthus lasiophyllus Lowell A. Ahart 2013-5-1 18681 Colusa North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CAS-BOT-BC48829  Ceanothus cuneatus Roxana S. Ferris 1926-4-23 6580 Colusa Stonyford Comment
  CHSC22526  Ceanothus cuneatus Robert A. Schlising; Glenn Keator 1962-1-21 2032 Colusa Steep adobe bank and open hills. 548 Comment
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Mar 26 2014
  HSC47566  Ceanothus cuneatus J. P. Smith, J. O. Sawyer 1978-4-29 9768 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 Comment
  UCD22472  Ceanothus cuneatus Brian Vanden Heuvel 2003-2-20 201 Colusa 6.7 miles west of Stonyford on Fouts Spring Road. Comment
  HSC98203  Ceanothus cuneatus Steven Lagos 1974-5-4 50 Colusa 915 Comment
  JEPS42087  Ceanothus cuneatus var. cuneatus W. L. Jepson 1920-5-23 8964 Colusa near Leesville; SW Colusa Co., Bear Valley Comment
  UCD170260  Ceanothus integerrimus D. O. Burge 2016-11-3 2185 Colusa Fouts Springs area, roadside on Forest Road M10, E of Fouts Springs. 630 Comment
  UCD170264  Ceanothus integerrimus D. O. Burge 2016-11-3 2188 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 980 Comment
  HSC90415  Ceanothus jepsonii C. Wilson, P. Kittelson, M. Hardig 1992-4-11 42 Colusa Walker Ridge Rd., 1.0 mi S of Blue Oak Recreation Site 76 Comment
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Aug 18 2014
  UCD56667  Ceanothus jepsonii Jack Alderson 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 556 Comment
  HSC43201  Ceanothus jepsonii var. albiflorus J. Walker 1977-4-24 27 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  HSC98207  Ceanothus oliganthus var. sorediatus Steven Lagos 1974-5-4 43 Colusa 747 Comment
  CHSC84199  Centaurea melitensis Lowell Ahart 2003-7-14 10387 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  SEINET11587777  Centaurea melitensis Unknown 2009-5-20 14758 Colusa Colusa County Comment
  CHSC94445  Centaurea solstitialis Lowell Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA725012  Centaurea solstitialis L. Ahart 2006-8-9 13148 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CAS-BOT-BC284462  Centaurea solstitialis Roxana Stinchfield 1916-7-12 474 Colusa Street - College City Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  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
  UCD18849  Centromadia fitchii Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 157 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001. Comment
  UCD55450  Centromadia fitchii Ellen Dean; Gordon Harrington 2006-10-6 3275 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCD61446  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3891 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  JEPS104140  Centromadia parryi subsp. rudis Lowell Ahart 2003-8-15 10510 Colusa On the south side of Highway 20, ca 1 mi sw of Williams. 27 Comment
  UCD130150  Centromadia parryi subsp. rudis P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  UCD162396  Centromadia parryi subsp. rudis Juliette Robinson 2013-10-8 2 Colusa Along Highway 20, just east of I-5. 19 Comment
  UC894340  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 197 Colusa near Colusa Comment
  CAS-BOT-BC279208  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  CHSC83633  Centromadia pungens subsp. septentrionalis L. P. Janeway 2002-4-25 7525 Colusa Sacramento Valley. Vicinity of Funks Creek and Tehama-Colusa Canal. Drainage bottoms. 51 Comment
  UC1299375  Cephalanthera austiniae Freed W. Hoffman 1948-6-27 2525 Colusa 8.6 mi. s.w. Fouts Springs (Upper Letts Valley); w. Colusa Co., Upper Letts Valley 1310 Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. Comment
  UCD163000  Cerastium glomeratum Craig D. Thomsen 2000-3-31 2164 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
  UC1543231  Cercis occidentalis Donald G. Nelson, et al. 1940-6-9 692 Colusa Happy Creek Camp Paradise Creek (nw corner of county, creek empties into middle fork of Stony Creek) 731 Comment
  RSA670064  Cercocarpus betuloides G. L. Webster 1989-5-6 7698 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  UC1618010  Cercocarpus betuloides Donald G. Nelson 1940-6-8 679 Colusa w of Stoneyford (on e slopes of Snow Mountain, nw boundary of the county, trail several miles above Bonnie View); Snow Mountain 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
  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
  HSC48143  Chaenactis glabriuscula var. heterocarpha Thomas W. Nelson, Jane P. Nelson 1978-4-30 3971 Colusa Along SR 20 just E of Colusa-Lake County line 549 Comment
  JEPS94218  Chaenactis glabriuscula var. heterocarpha Vernon Oswald and Lowell Ahart 1998-5-7 9011 Colusa Bartlett Springs Road 2.8 mi w of Bear Valley Road (0.1 mi e of Sawtelle Valley and Grapevine Flat Roads) 633 Comment
  UC638668  Chaenactis glabriuscula var. heterocarpha Ethel Crum 1938-5-7 2014 Colusa 4.2 mi n of Rumsey; Inner North Coast Ranges, Comanche Hills 254 Comment
  UCD81859  Chaenactis glabriuscula var. heterocarpha Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5743 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  UCD74341  Chaenactis glabriuscula var. megacephala G. Ledyard Stebbins 1968-5-10 6685 Colusa Summit of Walker Ridge, on Lake- Colusa County line, between Hwy 20 and Leesville - Bartlett Springs Rd. South of Leesville at summit of Cold Spring Mtn. (Note: date in notebook is 10 May, but labels made by Stebbins at CAS say 15 May.) 1091 Comment
  CHSC113044  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 A Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC113045  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  JEPS120711  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-10-1 19104 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UC73410  Chamaesyce serpyllifolia H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD83717  Chamomilla suaveolens Joseph Schlottman; with PLB 102 class 2010-5-2 3 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  JEPS86607  Cheilanthes gracillima L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6711 Colusa 0.5 mi. n.e. Summit Springs (s.w. flank of Snow Mt.); Snow Mt. 1650 Comment
  JEPS80114  Chenopodium L. R. Heckard with J. Hickman 1980-7-1 5273 Colusa East Peak Snow Mt. (flat at summit, Colusa-Lake County boundary) 2148 Comment
  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
  CHSC94515  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  JEPS110058  Chenopodium berlandieri Lowell Ahart 2006-8-22 13220 A Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford 349 Comment
  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
  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
  CAS-BOT-BC184905  Chloris virgata Margaret J. Williams 1981-9-2 81 -162 Colusa On Wisconsin Avenue, south of Arbuckle. Comment
  UCD63102  Chlorogalum pomeridianum Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4933 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  CHSC77613  Chorizanthe membranacea Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. Shale slope in blue oak woodland. 167 Comment
  CHSC86996  Chorizanthe membranacea B. Castro 2003-5-14 1433 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On west edge of Sacramento Valley. 134 Comment
  HSC45743  Chorizanthe membranacea Stephen Plant 1978-4-22 216 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCR138873  Chorizanthe membranacea B. Ellyson, J. Hooke, D. Newman 1996-5-5 43 Colusa Coast Range, Leesville, 9.7 mi NW of Hwy 20 on Leesville Rd.; 70 mi east of Hwy 101 on Hwy 20 445 Comment
  HSC65996  Chorizanthe membranacea D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 43 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  RSA133247  Chrysothamnus nauseosus subsp. albicaulis Peter H. Raven, R. Snow 1959-9-11 14416 Colusa 0.5 mile south of Snow Mt. 1921 Comment
  RSA96824  Chrysothamnus nauseosus subsp. albicaulis Percy C. Everett, E. K. Balls 1954-10-17 20333 Colusa 9.1 miles SW of boundary of Mendocino National Forest, road from Stonyford to Upper Lake 793 Comment
  UCD82543  Cirsium cymosum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5698 a Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CDA1159  Cirsium cymosum T. C. Fuller 1958-6-16 1848 Colusa Hillside above Hwy. 20; 2 mi. W/ Cache Creek Bridge. 0 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
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  UCD57862  Clarkia Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 49 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. South terrace of Thompson Creek about 300 feet upstream of breached dam close to Road Kill Cafe. 395 Comment
  CAS-BOT-BC162597  Clarkia affinis C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-29 35 Colusa Bear Valley Rd., 2 mi. N of Hwy 20 365 Comment
  CHSC32911  Clarkia affinis C. Macdonald; P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 55 Colusa Leesville Road, road from Leesville to Williams, 3.8 miles east of Leesville. Comment
  CHSC83595  Clarkia affinis L. P. Janeway 2002-4-24 7518 Colusa Sacramento Valley/Inner North Coast Ranges border. Vicinity of Logan Ridge, Stone Corral Creek, Funks Creek, and Golden Gate. 124 Comment
  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
  CAS-BOT-BC164145  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  CAS-BOT-BC164149  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  SEINET4143383  Clarkia concinna R. R. Halse 1989-5-7 3827 Colusa Along the Leesville Road, 3 miles southeast of Leesville, just below the summit of the pass on the east side.; 0 480 Comment
  CHSC1095  Clarkia concinna subsp. concinna V. Holt 1935-5-12 Colusa Stonyford. 365 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
  UC518943  Clarkia concinna subsp. concinna David D. Keck 1933-5-30 2401 Colusa w Wilbur Springs (1 mi e of Lake County line) Comment
  UCD66707  Clarkia concinna subsp. concinna Craig D. Thomsen 2001-5-24 2503 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.17 and 2.25. 342 Comment
  JEPS105736  Clarkia gracilis subsp. albicaulis David Gowen 2004-5-18 88 Colusa South of Stonyford. Approx. 7/10 mile along Goat Mt. Road from its junction with the paved road to Stonyford. Comment
  RSA151824  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa Near Cooks Creek, about 1/4 mile east of Cooks Springs Comment
  SEINET12193550  Clarkia gracilis subsp. albicaulis R. A. DeMartile 1983-1 107 Colusa Bartlett Springs Road N of Baldy Mountain 762 Comment
  CHSC79533  Clarkia gracilis subsp. gracilis B. Castro; L. P. Janeway 2000-5-2 1113 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  UCR228652  Clarkia gracilis subsp. gracilis Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4939 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 20 351 Comment
  CHSC112017  Clarkia gracilis subsp. sonomensis David Isle; F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of jct w/ Lodoga-Stonyford Road. 408 Comment
  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
  CHSC79779  Clarkia modesta L. P. Janeway; B. Castro 2000-5-4 6702 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 265 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
  UCR257973  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen, Gordon Harrington 2009-5-12 2840 Colusa Walker Ridge. Eaton Springs, c. 1 mi east of Walker Ridge Road 707 Comment
  CHSC72453  Clarkia rhomboidea L. P. Janeway; Dave Isle 1998-7-3 5707 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. On road cutbank. 1051 Comment
  CHSC79780  Clarkia rhomboidea G. F. Hrusa 1998-6-19 14604 Colusa the North Coast Ranges. Above upper Little Stony Creek. Goat Mtn. Rd. ~2 km. W of campground. UTM: 10S 05351 N, 43466 E. 490 Comment
  HSC94112  Clarkia rhomboidea G. Fred Hrusa 1998-6-19 14604 Colusa Above Upper Little Stony Creek, Goat Mtn. Rd., about 2 km W of campground 490 Comment
  CAS-BOT-BC164757  Clarkia rhomboidea Freed W. Hoffman 1948-6-28 2541 Colusa Between Upper and Lower Letts valleys Comment
  RSA537479  Clarkia rhomboidea Barbara Ertter 1989-7-1 8597 Colusa Road to Goat Mt Lookout 2.2 miles S of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of S Fk Stony Creek, ca 12 airmiles WSW of Stonyford. 1500 Comment
  CHSC25155  Claytonia exigua subsp. exigua J. D. Sagray 1970-4-4 5 Colusa 1 mi w of Abbott Mercury Mine on Hwy 20, 2 ft off side of Hwy. 594 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
  UC1745695  Claytonia exigua subsp. exigua Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1383 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  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
  JEPS86633  Claytonia exigua subsp. exigua L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6693 Colusa w of Summit Springs (near road, sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1550 Comment
  RSA614426  Claytonia exigua subsp. exigua K. L. Chambers 1988-3-24 5405 Colusa Hwy 20., ca. 22 mi. west of Williams, Inner Coast Range. Comment
  UC1051500  Claytonia exigua subsp. exigua Helen K. Sharsmith 1953-6-19 4281 Colusa near Trough Springs (on Trough Springs Ridge); Inner North Coast Ranges, Mendocino National Forest 975 Comment
  UC1745697  Claytonia gypsophiloides Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1380 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. Comment
  UCD162997  Claytonia parviflora Craig D. Thomsen 2000-3-31 2086 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.2 mile west of Hwy 20/16 intersection. 345 Comment
  UCD82629  Claytonia parviflora Craig Thomsen; G. Harrington 2009-5-12 2901 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
  UC1745696  Claytonia parviflora subsp. parviflora Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1382 Colusa Between Leesville & Stonyford. 6.6 mi. S of Lodoga. 3 mi. N of Leesville. 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
  UCD66965  Claytonia perfoliata Ellen Dean; Davis Botanical Society 2008-5-31 5009 Colusa west of I-5 at Maxwell, east slope of Goat Mountain, along Goat Mountain Road, Cedar Grove Campground. 1311 Comment
  CAS-BOT-BC440035  Claytonia perfoliata subsp. perfoliata Roxana S. Ferris 1926-4-21 6311 Colusa Sycamore Slough near Sycamore Comment
  JEPS80200  Claytonia perfoliata subsp. perfoliata L. R. Heckard and J. Hickman 1980-7-3 5355 Colusa ca 10 mi w Stonyford (just w of Summit Springs); Snow Mt. 1548 Comment
  UCD100555  Claytonia saxosa A. M. Shapiro 1994-6-12 s.n. Colusa at road junction just below summit of Goat Mountain. Comment
  HSC86900  Clematis lasiantha L. Blackford, S. Branch, D. Malm 1988-4-16 55 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  CAS-BOT-BC92546  Clematis ligusticifolia A. F. Hough 1924-6-22 3 Colusa California Forest. McDaniels R.S. 914 Comment
  CAS-BOT-BC92547  Clematis ligusticifolia Roxana Stinchfield 1916-7-5 388 Colusa Banks of Sycamore Slough. Stinchfield Ranch. Comment
  UCD95592  Clematis ligusticifolia D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 420 Comment
  UC71624  Collinsia heterophylla Miss Alice King 1905-1 Colusa College City Comment
  UCD57100  Collinsia heterophylla Gordon Harrington; Diana Hickson 2007-4-7 0015 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  UCR104588  Collinsia heterophylla Peter S. Lathrop 1993-4-15 s.n. Colusa North Coastal Range, along California State Highway 16, 5 miles south of State Highway 20 305 Comment
  CDA34126  Collinsia heterophylla P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  JEPS80140  Collinsia rattanii L. R. Heckard with J. Hickman 1980-7-2 5300 Colusa ca 10 mi w Stonyford (trail to Snow Mtn. peaks from Summit Springs); Colusa-Lake County Boudary 1661 Comment
  CHSC88866  Collinsia sparsiflora Christine Hantelman 2000-4-1 39 Colusa In Bear Valley. West side of creek. Comment
  SEINET13406348  Collinsia sparsiflora R. R. Halse 2013-3-26 8743 Colusa Indian Valley, along the Leesville-Logoda Road ca. 5.5 miles S of Logoda, 3.2 miles N of the junction of the Leesville and Bear Valley Roads. 426 Comment
  CDA34091  Collinsia sparsiflora P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  JEPS94165  Collinsia sparsiflora var. arvensis Vernon Oswald and Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodoga Rd. 4.2 mi. s. Stonyford 384 Comment
  CHSC86513  Collinsia sparsiflora var. collina B. Castro 2003-3-18 1384 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. Ca. 12 ft up from small drainage. 195 Comment
  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
  JEPS80164  Collinsia torreyi var. wrightii L. R. Heckard with J. Hickman 1980-7-2 5315 Colusa ca 10 mi w Stonyford (trail from Frog Pond to Milk Ranch, w of West Peak, Snow Mt.); Snow Mt. 1950 Comment
  JEPS81380  Collinsia torreyi var. wrightii L. R. Heckard and J. C. Hickman 1982-7-8 5991 Colusa trail from saddle between E and W Peaks towards Signal Peak, Snow Mt. Snow Mt. 2042 Comment
  JEPS81340  Collinsia torreyi var. wrightii L. R. Heckard and J. C. Hickman 1982-7-6 5953 Colusa West Peak Snow Mt (second meadow from Cedar Camp to Dark Hollow Cirque) 1981 Comment
  HSC31615  Collomia diversifolia Maralyn O'Meara, Gary S. Lester 1974-5-4 341 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC42333  Collomia diversifolia M. A. Baker 1977-4-24 223 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
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Jul 31 2014
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  JEPS15537  Collomia tinctoria G. Thomas Robbins with L. R. Heckard 1956-7-25 3695 Colusa open rocky slope in woods on ridge above Fouts Camp (along trail to Snow Mt. (about 1 1/2 mi airline se of summit), on Lake-Colusa County boundary) 1920 Comment
  JEPS80144  Collomia tinctoria L. R. Heckard with J. Hickman 1980-7-2 5305 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary) 1706 Comment
  NY643135  Convolvulus arvensis R. J. Stinchfield 1916-7-8 401 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UC71778  Convolvulus arvensis H. P. Chandler 1905-10-16 Colusa Princeton Comment
  CHSC67605  Cordylanthus palmatus James D. Jokerst 1988-8-23 3039 Colusa Colusa National Wildlife Refuge S of Willows, in Pond 3, E and adjacent to Ohm Rd. in southern-most cell E of the road. Comment
  CHSC67606  Cordylanthus palmatus James D. Jokerst 1988-8-23 3036 Colusa Delevan National Wildlife Refuge S of Willows, in Cell 12. Comment
  CHSC67608  Cordylanthus palmatus James D. Jokerst 1988-8-23 3038 Colusa Colusa National Wildlife Refuge S of Willows, in Tract 7 ca. 150 m NE of Colusa Trough. Comment
  SEINET10582733  Cordylanthus palmatus R. D. Stone 1987-1 Colusa Comment
  CDA16105  Cordylanthus pilosus G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15248 Colusa North Coast Ranges; Cedar Camp- Goat Mtn. Rd. 792 Comment
  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
  JEPS75706  Cordylanthus pilosus subsp. pilosus L. R. Heckard and R. Bacigalupi 1976-9-6 4456 Colusa 6 airmiles se Fouts Springs (along road to Summit Springs, below and w of Summit Springs, 1 mi n of junction with Stoneyford Rd., Colusa-Lake County line); Snow Mt. 1219 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
  UCD41212  Cornus glabrata John Snelling 1986-5-17 3 - Colusa 2.8 mi. west of Stonyford along Fouts Spring Road. Comment
  JEPS75866  Cornus sericea subsp. sericea L. R. Heckard 1974-9-10 3882 Colusa along East Circle Trail Snow Mt. (along spur running s.e. from West Peak) 2011 Comment
  JEPS80771  Cornus sericea subsp. sericea L. R. Heckard and J. C. Hickman 1981-7-30 5742 Colusa s.e. side Snow Mt. (Trout Creek Trail) 1661 Comment
  CHSC83313  Cotula coronopifolia 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
  CHSC98784  Cotula coronopifolia Richard R. Halse 2007-3-23 7109 Colusa Williams: by junction of 5th Street and B Street. 25 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
  RSA0096943  Crassula connata R. R. Halse 2010-3-20 7827 Colusa Williams. By junction of 5th Street and B Street. 25 Comment
  SEINET8194448  Crassula connata R. R. Halse 2010-3-20 7827 Colusa Williams, junction of 5th Street and B Street 25 Comment
  UCD101846  Crassula connata Sam Olusuyi 1967-4-29 37 Colusa Bear Valley, 4.3 miles north of junction of State Highway 20 and Wilbur Springs Road. 396 Comment
  JEPS15561  Crepis monticola G. Thomas Robbins with L. R. Heckard 1956-7-25 3719 Colusa Snow Mt. West; summit, Lake-Colusa Co. boundary 2145 Comment
  HSC72210  Crepis monticola Thomas W. Nelson, Jane P. Nelson 1980-6-24 5874 Colusa Colusa-Lake County line; Along trail to Snow Mtn. ca. 1/2 mi. from trailhead 1616 Comment
  CHSC84955  Croton setiger Lowell Ahart 2003-10-23 10676 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
  CHSC94318  Croton setiger Lowell Ahart 2006-8-9 13103 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  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
  CAS-BOT-BC190083  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa Near Butte Creek. Butte Lodge Outing Club, three miles above Colusa. Comment
  CHSC113051  Crypsis schoenoides Lowell Ahart 2013-10-1 19076 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC94448  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA268077  Crypsis schoenoides J. R. Reeder, C. G. Reeder 1972-6-6 5658 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
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Aug 18 2014
  UC727674  Crypsis schoenoides Milo S. Baker 1946-9-4 11621 Colusa near locked gate of Colusa Gun Club; Butte Sink Comment
  RSA268076  Crypsis vaginiflora J. R. Reeder, C. G. Reeder 1972-6-6 5657 Colusa ca. 8 miles W of Live Oak, one mile S of Wildlife Area headquarters. 183 Comment
  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
  UC1950107  Crypsis vaginiflora Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8873 Colusa SE end of East Park Reservoir N of Lodoga Comment
  UCD84551  Cryptantha clevelandii Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6149 Colusa Walker Ridge. Just south of radio tower on Cold Spring Mountain. 945 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
  RSA216793  Cryptantha excavata Robert F. Hoover 1968-5-27 11099 Colusa Bear Creek canyon N. of Highway 20 (near Wilbur Springs) Comment
  SBBG40520  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Crk cyn N of Hwy 20 (near Wilbur Springs) Comment
  CHSC106242  Cryptantha hispidula B. Castro; L. P. Janeway 2001-6-3 1258 B Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. At upper edges of meadow. 883 Comment
  UC1178523  Cryptantha hispidula Leo Koch 1940-4-29 936 A Colusa near Lake and Colusa county line (along Hwy 20) Comment
  UC1731393  Cryptantha hispidula Dean W. Taylor 1998-6-23 16704 Colusa Walker Ridge North Coast Ranges (along access road) 929 Comment
  UC763082  Cryptantha hispidula R. F. Hoover 1941-5-2 4983 Colusa just e Lake County line (on Williams-Clear Lake highway) Comment
  UC971694  Cryptantha hispidula Leo F. Koch 1940-4-29 936 a Colusa near Colusa and Lake county line (along Highway 20, Williams Highway) Comment
  UCD66613  Cryptantha hispidula Craig D. Thomsen 2000-5-11 2284 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD82513  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2871 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82527  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2883 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCD83811  Cryptantha hispidula Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5958 Colusa Walker Ridge, along Walker Road, just N of main turnoff to Barrel Springs. 712 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC1212585  Cryptantha intermedia Francia Chisaki and Helen Sharsmith 1959-5-26 1331 Colusa 5 air mi w Stonyford (above Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest 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
  UCD61451  Cryptantha intermedia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3895 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  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
  HSC3610  Cryptantha intermedia var. hendersonii Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  CHSC112215  Cryptantha intermedia var. intermedia Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18630 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD163839  Cryptantha intermedia var. intermedia Craig D. Thomsen 2001-4-12 2469 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  UC596361  Cryptantha nemaclada R. F. Hoover 1938-4-24 3217 Colusa w of Arbuckle (Sand Creek foothills); Sand Creek Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  CAS-BOT-BC80806  Cupressus sargentii C. B. Wolf; E. R. Johnson 1934-10-15 6189 Colusa [Cook] Cooks Springs, western part of county 548 Comment
  NY16798  Cupressus sargentii C. B. Wolf 1934-10-15 6189 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
  CHSC114931  Cuscuta approximata CDFA Staff 2011-11-5 Colusa Maxwell. Comment
  JEPS80873  Cuscuta californica L. R. Heckard and J. C. Hickman 1980-9-15 5436 Colusa n of road at Summit Springs, Lake-Colusa County boundary Snow Mt., Summit Springs 1524 Comment
  UCD61441  Cuscuta californica var. californica Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3886 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 335 Comment
  UCD67007  Cuscuta californica var. californica Craig D. Thomsen 2008-5-23 2740 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 0.75 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 520 Comment
  RSA133250  Cuscuta ceanothi P. H. Raven 1959-9-11 14423 Colusa Bonnie View 915 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
  UCD163659  Cuscuta indecora var. indecora Craig Thomsen 1998-6-10 1957 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  JEPS90814  Cuscuta salina Dean W. Taylor 1993-8-31 14072 Colusa 200 m e of North Fork Logan Creek (Sacramento Valley, Sacramento National Wildlife Refuge); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  SEINET3157202  Cycladenia humilis T. S. Brandegee 1890-6-23 sn Colusa Snow Mountain Comment
  UC1151661  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 mi s College City Comment
  UCD37228  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa Colusa County, 5.5 miles south of College City, just northeast of Hershey Railroad siding, Grieve Road (Country Road 88). Comment
  CAS-BOT-BC433233  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites-Logoda Road ca. 4.7 miles northeast of Logoda; on the west end of Grapevine Pass. 527 Comment
  SEINET11262863  Cynoglossum grande Richard R. Halse 2014-3-25 9032 Colusa Along the Sites Logoda Road ca 4.7 miles NE of Logoda on the W end of Grapevine Pass.; 0 527 Comment
  UC1100564  Cyperus acuminatus Herbert L. Mason and Verne Grant 1946-8-6 12969 Colusa pond 2.7 mi. n. Colusa (between Sacramento R. and Butte Creek); Butte Sink Comment
  UC837462  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule near Sycamore Slough Comment
  CAS-BOT-BC114783  Cyperus acuminatus Milo S. Baker 1946-9-4 11590 Colusa Gridley-Princeton Rd. Butte Sink. Comment
  CHSC94416  Cyperus difformis Lowell Ahart 2006-8-9 13143 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SEINET9753686 Image available Cyperus eragrostis Richard Carter 2006-7-31 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45 Comment
  CHSC112621  Cyperus erythrorhizos Lowell Ahart 2013-10-1 19078 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
  JEPS64102  Cyperus erythrorhizos W. L. Jepson 1929-10-1 15342 Colusa Maxwell 25 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
  POM313066  Cyperus strigosus S. Galen Smith 1949-9-9 1871 Colusa Rice fields 3 miles west of Williams Comment
  JEPS120794  Cypselea humifusa Lowell Ahart 2013-10-1 19073 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  CAS-BOT-BC445509  Damasonium californicum A. A. Heller; H. E. Brown 1902-5-1 5437 Colusa Near Colusa Comment
  CHSC78719  Damasonium californicum J. Marr; C. Warren, H. West 1998-7-1 Colusa Vicinity of Sites and Antelope Valley. In vernal pools N of Stone Corral Ck. 94 Comment
  CAS-BOT-BC445505  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after passed the Wilbur Springs road. Along Bear Creek Comment
  CAS-BOT-BC445506  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa Ca. 27 mi. W. of Williams after having passed the Wilbur Springs road. Along Bear Creek Comment
  CAS-BOT-BC445510  Damasonium californicum H. M. Hall 1916-8-10 10265 Colusa Colusa (4 mi. west). Comment
  UC584135  Damasonium californicum J. Clausen 1935-5-20 1017 Colusa ca. 27 mi. w. after having passed the <Wilblur> Springs rd. Williams (along Bear Creek) Comment
  CHSC75705  Datisca glomerata Vernon H. Oswald; Lowell Ahart 1999-6-22 9787 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  CDA20254  Datisca glomerata G. D. Barbe, Nola Parmer 1982-6-4 3636 A Colusa North Coast Ranges; Goat Mountain Road 8.7 mi w of Ladoga-Stonyford Rd, along Little Stony Creek, 1.2 mi w of Little Stony Creek bridge. Stonyford Ranger District, Mendocino National Forest. 0 Comment
  UC88929  Deinandra kelloggii K. Brandegee 1887-5-1 Colusa Comment
  JEPS81344  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-7 5957 Colusa Middle Fork of South Fork of Stony Creek Snow Mt. (originating in Veratrom Meadow before Milk Ranch) 1935 Comment
  HSC89669  Delphinium decorum subsp. tracyi A. Smith, A. Eller, B. Hoffman 1989-4-15 21 Colusa Goat Mtn. Rd. 0.4 mi. SW of Lodoga/Stonyford intersection 152 Comment
  HSC85761  Delphinium hesperium R. Earing, C. Cavanaugh, C. Collins 1987-4-12 82 Colusa Leesville Rd. Comment
  CAS-BOT-BC238187  Delphinium hesperium subsp. pallescens Roman Gaukin 1958-5-4 s.n. Colusa Bear Valley 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
  UC726271  Delphinium hesperium subsp. pallescens A. A. Heller 1940-5-6 15574 Colusa roadside bank on State Hwy #20 about 3 mi e junction with Highway #16 (<later note places locality along road from Williams to Upper Lake...a spot 3 mi e of <junction> actually is n...) Comment
  UCD148525  Delphinium hesperium subsp. pallescens G. F. Hrusa; K. van Katwyk 1995-4-22 12137 Colusa on south side of Leesville Road approximately 3 miiles north of Highway 20. 290 Comment
  UCD163308  Delphinium hesperium subsp. pallescens Craig D. Thomsen 1997-4-20 1911 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  HSC45441  Delphinium hesperium subsp. pallescens M. Alcasas 1978-4-23 58 Colusa Bartlett Springs Rd., 0.5 mi. from junction with Bear Valley Rd 457 Comment
  UCD57722  Delphinium nudicaule Jordan Thompson; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. South side of Craig Creek on south side of unimproved road. 335 Comment
  HSC24968  Delphinium patens M. Dole 1963-4-15 30 Colusa 6 mi. S of the junction of Hwys. 16 and 20 on Hwy. 16 Comment
  CAS-BOT-BC116431  Delphinium patens subsp. patens Roxana S. Ferris 1926-4-23 6446 Colusa Grapevine Grade near top between Stonyford and Sites Comment
  CAS-BOT-BC17043  Delphinium recurvatum A. A. Heller 1940-5-6 15574 Colusa State Highway #20, about 3 miles east of the junction with Highway #16. 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
  UCR146707  Delphinium variegatum Roman Gankin 1958-5-4 s.n. Colusa Bear Valley 400 Comment
  UCD14297  Delphinium variegatum Nelson Cronyn 1984-4-22 5 Colusa Colusa Co.; 3.2 miles north of Highway 20 on Bear Valley Road; 381 Comment
  UCD15434  Delphinium variegatum Lisa Montang 1985-4-13 4 Colusa Colusa Co.; Bear Valley, 8.6 miles north of Wilbur Springs Road and Highway 20 intersection; 390 Comment
  UCD96611  Delphinium variegatum Rolf Y. Berg 1963-3-17 s.n. Colusa State Highway 16 between Cache Creek Canyon and junction with State Highway 20. Comment
  UC1093630  Delphinium variegatum subsp. variegatum Francia Chisaki, Gene B. Newcomb 1958-4-1 1103 Colusa On road to Lodoga, 6.6 miles North of junction with Highway #20 Comment
  CAS-BOT-BC16954  Delphinium variegatum subsp. variegatum L. S. Rose 1936-4-27 36177 Colusa 10 mi. NW of Rumsey 213 Comment
  CAS-BOT-BC192669  Deschampsia danthonioides L. R. Abrams 1928-5-8 12591 Colusa 2 miles south of Arbuckle Comment
  UC188868  Deschampsia danthonioides Miss M. Alice King 1905-1 Colusa near College City College City; Sacramento Valley Comment
  UCD163856  Deschampsia danthonioides Craig D. Thomsen 2001-4-26 2483 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  SEINET10524208  Deschampsia danthonioides A. Arthur Heller 1902-5-1 Heller 5435 Colusa Near College City. Comment
  JEPS75750  Deschampsia elongata L. R. Heckard and R. Bacigalupi 1976-9-6 4430 Colusa along trail from Summit Springs to Fouts Camp (Snow Mt.); Lake-Colusa Co. Line, Snow Mt. 1798 Comment
  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
  UC1053476  Dicentra chrysantha Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3179 Colusa just w Bear Valley (slope just w of base of grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  UC725575  Dicentra chrysantha A. A. Heller 1940-6-5 15713 a Colusa e of Lodogo (near the foot of grade, on the Lodogo-Sites road) 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
  JEPS80086  Dicentra uniflora L. R. Heckard with J. Hickman 1979-6-16 5093 Colusa about 0.5 mi s Milk Ranch (nw of Snow Mt. West Peak) 2011 Comment
  CAS-BOT-BC277739  Dichelostemma Mona Bourell 1997-3-29 5810 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground Comment
  UC1093627  Dichelostemma capitatum Francia Chisaki and Gene B. Newcomb 1958-4-1 1098 Colusa 0.7 mi nw Highway 20 junction with road to Lodoga (on road to Lodoga) Comment
  UCR233440  Dichelostemma capitatum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17128 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CAS-BOT-BC500074  Dichelostemma capitatum Roxana S. Ferris 1917-4-12 521 Colusa 4 mi east of Williams. Alkali Plains. 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
  HSC31395  Dichelostemma capitatum subsp. capitatum Maralyn O'Meara, Gary S. Lester 1974-5-4 350 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC31688  Dichelostemma capitatum subsp. capitatum Bonnie Prange 1974-5-4 Colusa Near Clyde Mine 854 Comment
  HSC31718  Dichelostemma capitatum subsp. capitatum Teresa Prendusi 1974-5-4 50 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC83387  Dichelostemma capitatum subsp. capitatum Bob Wych 1975-4-20 18 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. Comment
  UCD163683  Dichelostemma capitatum subsp. capitatum Craig Thomsen 1999-4-15 1984 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  RSA367472  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1978-4-2 9532 Colusa Bear Valley Road, 3 miles from its junction with State Route 20. 366 Comment
  UC1334721  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa between Williams and Clear Lake (Hwy 20) 152 Comment
  SD72213  Dichelostemma congestum Eugene Memmler 1969-5-8 105 Colusa Between Williams and Clear Lake, Highway 20. Coastal valley hills. 152 Comment
  CDA39450  Dichelostemma volubile T. C. Fuller 1958-5-27 3665 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  CHSC32197  Dieteria canescens var. shastensis James Jokerst 1980-8-8 1084 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  CHSC29758  Diplacus tricolor K. R. Stern 1980-5-5 6626 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  RSA0018384  Dipsacus fullonum Joan Stewart 1998-6-18 755 Colusa Bear Valley Comment
  CAS-BOT-BC208650  Distichlis spicata Roxana Stinchfield 1916-6-17 280 Colusa Alkali at Tule near College City Comment
  CAS-BOT-BC208652  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  CHSC114987  Distichlis spicata Lowell Ahart 2015-5-5 20116 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC94744  Distichlis spicata Lowell Ahart 2006-9-26 13353 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell. 24 Comment
  JEPS118718  Distichlis spicata B. Castro, L. P. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  RSA0114870  Distichlis spicata Lowell Ahart 2015-4-28 20116 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 571 Comment
  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
  UCD64170  Distichlis spicata Beecher Crampton 1958-6-27 4979 Colusa 2.5 miles south of Grimes. Comment
  CDA32963  Distichlis spicata Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  SEINET176835 Image available Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford. 305 Comment
  UCD112600  Dodecatheon hendersonii Christopher Mallek 2008-4-17 WR2- 5 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  CHSC79145  Downingia insignis B. Crampton 1953-4-29 1145 Colusa Along the road, about 3 miles east of Maxwell. Comment
  UC76662  Downingia insignis Miss M. Alice King 1905-1-1 Colusa near College City; Sacramento Valley Comment
  UCD18837  Downingia insignis Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 144 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  UCD55041  Downingia insignis Herbert L. Mason 1953-4-5 14506 Colusa Three miles east of Maxwell. Comment
  CHSC63534  Downingia ornatissima var. ornatissima Vernon H. Oswald; Joseph Silveira 1994-4-18 6110 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, on the SW side of Tract H. 21 Comment
  LA204320  Draba cuneifolia A. L. Haines; William Stewart 1935-2-10 sn Colusa 2 mi. N of Miller's Landing 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
  UCD81726  Dudleya cymosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5729 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  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
  CHSC112645  Dysphania botrys Lowell Ahart 2013-10-1 19087 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  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
  CHSC112622  Dysphania pumilio Lowell Ahart 2013-10-1 19086 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
  CHSC94418  Echinochloa crus-galli Lowell Ahart 2006-8-22 13215 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UC1100257  Echinochloa crus-galli Malcolm A. Nobs and S. Galen Smith 1949-9-9 1874 Colusa 3 mi w Williams; w of Williams Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CAS-BOT-BC197273  Echinochloa muricata var. microstachya Malcom A. Nobs; S. Galen Smith 1949-9-9 1874 Colusa 3 miles west of Williams Comment
  CDA186  Echinochloa oryzicola P. B. Kennedy 1928-9-15 Colusa Rice Station, Cortena. 0 Comment
  UCD61111  Echinochloa oryzicola P. B. Kennedy 30-31 May 1922 Colusa Colusa County. Comment
  UCD61169  Echinochloa oryzoides Hursh 1919-11-12 X 3342 Colusa Williams. Comment
  UCD61175  Echinochloa oryzoides P. B. Kennedy 1928-9-15 Colusa Cortena. Comment
  CAS-BOT-BC445568  Echinodorus berteroi Roxana Stinchfield 1916-7-11 436 Colusa Davis Tule near Sycamore Slough Comment
  UC1100140  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-8-6 12971 Colusa pond 2.7 mi. n. of Colusa (between Sacramento R. and Butte Creek) Comment
  UC1562615  Echinodorus berteroi Barbara Ertter with Elizabeth Neese, Laura Fujii, and Dawn Espindola 1989-10-21 8879 Colusa n.w. side East Park reservoir (near end of East Park Rd. from Stonyford) 365 Comment
  UCD38843  Echinodorus berteroi Beecher Crampton 1958-6-27 4983 Colusa Colusa County; five miles south of Colusa. Comment
  HSC41911  Ehrendorferia chrysantha M. A. Baker 1977-4-24 224 Colusa Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCD95151  Ehrendorferia chrysantha K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  CAS-BOT-BC113364  Eleocharis engelmannii Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles. Comment
  UCD49598  Eleocharis engelmannii John M. Tucker 1953-8-28 2676 Colusa In rice field; 7 miles east of Arbuckle, Colusa County, California. Comment
  CHSC107160  Eleocharis macrostachya L. P. Janeway; B. Castro 2011-5-19 10288 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. Mass of this along south edge of the marsh. Occasional patches of this scattered through much of the marsh. 49 Comment
  CHSC79857  Eleocharis macrostachya L. P. Janeway 2000-5-31 6776 Colusa Inner North Coast Ranges. At Candy Bucket Springs, on the south side of canyon of Stony Creek. 628 Comment
  UC1100742  Eleocharis macrostachya Herbert L. Mason, Verne Grant 1946-8-6 12965 B Colusa 4 mi S of Colusa (pond on Colusa - Marysville Highway, W side of Sacamento River) Comment
  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
  POM198509  Eleocharis palustris Roxana Stinchfield 1916-7-11 453 Colusa Colusa - Williams Road at Trough Comment
  JEPS104048  Eleocharis parishii Lowell Ahart 2003-7-14 10382 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
  UCD163346  Eleocharis parishii Craig D. Thomsen 2000-5-11 2352 Colusa Walker Ridge. Buck Flat. 129 Comment
  UCD61458  Eleocharis parishii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3904 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  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
  SBBG83315  Elymus elymoides L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  UCD61431  Elymus elymoides Beecher Crampton 1958-5-19 4815 Colusa Little Stony Creek Canyon 4-8 miles west of Lodoga. Comment
  UCD72393  Elymus glaucus subsp. glaucus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5119 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern part of ranch, upslope of confluence of Bear and Cache Creeks. Along old hunting camp road southeast (downslope) of junction with ridge trail. 384 Comment
  JEPS80444  Elymus trachycaulus L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa slope w Summit Springs; Snow Mt. 1554 Comment
  UC1146624  Elymus trachycaulus Freed W. Hoffman 1944-7-13 1964 Colusa between Indian Valley and Bear Valley (w Colusa Co,); North Coast Ranges 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
  UC1053475  Emmenanthe penduliflora Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3180 Colusa Just west of base of the grade to Indian Valley (Bartlett Mt. Road), just west of Bear Valley. Inner North Coast Ranges Comment
  CHSC60744  Emmenanthe penduliflora var. penduliflora Vernon H. Oswald; Lowell Ahart 1993-5-27 5431 Colusa Sites-Lodoga Rd. ca 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). In loose mudstone along the road. 481 Comment
  CHSC79516  Emmenanthe penduliflora var. penduliflora B. Castro; L. P. Janeway 2000-5-2 1117 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC90779  Emmenanthe penduliflora var. penduliflora D. Isle 2002-4-18 183 Colusa Mendocino National Forest--North Coast Ranges. Upper Lake Watershed. S. of Bathhouse Trail Rd. 17N51, N. of Fouts Springs. 548 Comment
  UCD81376  Epilobium canum Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5403 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just west of the mouth of canyon (inside the canyon) that is located south of Brophy Canyon. 266 Comment
  JEPS75865  Epilobium canum subsp. latifolium L. R. Heckard 1974-9-10 3883 Colusa base of rocky cliff along spur running se from west peak; Snow Mt., East Circle Trail 2011 Comment
  CHSC113043  Epilobium ciliatum subsp. ciliatum Lowell Ahart 2013-10-1 19101 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
  JEPS80785  Epilobium ciliatum subsp. ciliatum L. R. Heckard and J. C. Hickman 1981-7-30 5758 Colusa se side of mt. Snow Mt., Trout Creek 1600 Comment
  JEPS75845  Epilobium ciliatum subsp. glandulosum L. R. Heckard 1974-9-10 3912 Colusa seep-stream area on ne slope of peak Snow Mt.. West Peak 2011 Comment
  CHSC86819  Epilobium cleistogamum Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC113048  Epilobium densiflorum Lowell Ahart 2013-10-1 19102 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC94471  Epilobium densiflorum Lowell Ahart 2006-8-9 13140 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS94756  Epilobium densiflorum Vernon H. Oswald and Lowell Ahart 1998-7-15 9303 Colusa 6.3 mi n of Highway 20 (w side of Walker Ridge Road 8.2 mi s of Bartlett Springs Road); Walker Ridge Road 792 Comment
  UC638657  Epilobium minutum Ethel Crum 1938-5-8 2026 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  CDA38115  Epilobium minutum T. C. Fuller 1958-5-27 s.n. Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 Comment
  JEPS79752  Epilobium minutum L. R. Heckard and J. C. Hickman 1980-7-2 5302 Colusa trail from Summit Springs to Snow Mt. Peaks (ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mtn. 1661 Comment
Read comments
Feb 26 2013
  JEPS74981  Epilobium nivium L. R. Heckard 1974-9-11 3953 Colusa along Summit Springs trail Snow Mt. 1737 Comment
  CHSC94473  Epilobium torreyi Lowell Ahart 2006-8-9 13117 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCSB4278  Epilobium torreyi Keator, Glenn 1958-6-17 Colusa Not far from Bartlett Springs in the foothills Comment
  JEPS118602  Epipactis gigantea B. Castro, L. P. Janeway 2001-6-3 1257 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. Leesville 7.5' quad. 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
  JEPS110232  Equisetum arvense Lowell Ahart 2006-8-22 13211 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  CHSC94512  Equisetum laevigatum Lowell Ahart 2006-8-22 13210 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC213552  Eragrostis hypnoides Roxana Stinchfield 1916-7-8 383 Colusa In bed of Sycamore Slough. Comment
  RSA0105552  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 Colusa Inner North Coast Range. East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  RSA129661  Eragrostis hypnoides H. S. Yates 1936-8-14 6139 Colusa 3 miles S. of Grimes 15 Comment
  SD262162  Eragrostis hypnoides David Isle, Rhonda Isle 2014-9-27 2143 Colusa Sacramento Valley Foothills: west side East Park Reservoir, 0.3 mile south of boatlaunch. Drying lake bed, c 100 yds east of normal lake edge. 49 Comment
  JEPS127604  Eragrostis hypnoides David Isle with Rhonda Isle 2014-9-27 2143 Colusa W side of East Park Reservoir, ca 0.3 miles S of boat launch, ca 100 yards E of normal lake edge. 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
  UCD63437  Eragrostis minor Tom Aldrich 1968-5-28 Colusa College City area. Comment
  RSA725279  Eragrostis pectinacea L. Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS80252  Eremocarpus setiger L. R. Heckard and J. Hickman 1980-9-15 5431 Colusa slopes w Summit Springs; Snow Mt. 1554 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
  UC1299602  Eriastrum brandegeeae Freed W. Hoffman 1947-6-20 1605 Colusa road from Stonyford to Fouts Springs Comment
  JEPS83809  Ericameria greenei L. R. Heckard and J. Hickman 1980-9-16 5463 Colusa West Peak Snow Mt. (n slope) 2042 Comment
  RSA589927  Ericameria linearifolia Michael A. Vincent, Robert Rhode 1996-3-30 7310 Colusa Along Walker Ridge Road, 11.5 miles S of junction with Brim Road Comment
  UCD131145  Ericameria linearifolia G. F. Hrusa; K. Van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges. 950 Comment
  RSA14917  Ericameria linearifolia L. S. Rose 1934-3-13 34054 Colusa 2 miles E Clayton. Comment
Read comments
Jul 30 2014
  JEPS75829  Ericameria nauseosa var. speciosa L. R. Heckard 1974-9-9 3837 Colusa trail up from Summit Springs, Snow Mt., Colusa-Lake County line Snow Mt. 1645 Comment
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  JEPS80754  Erigeron inornatus var. inornatus L. R. Heckard and J. C. Hickman 1981-7-29 5721 Colusa Spur, about .75 km se Summit Springs; Snow Mt., Summit Springs 1554 Comment
  CAS-BOT-BC295954  Erigeron philadelphicus Roxana S. Ferris 1917-4-15 611 Colusa Sycamore Slough Comment
  JEPS80214  Erigeron philadelphicus var. philadelphicus L. R. Heckard and J. Hickman 1980-7-3 5368 Colusa sw slope Snow Mt.; , Summit Springs 1554 Comment
  CHSC77302  Erigeron sumatrensis Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  CAS-BOT-BC216001  Eriodictyon californicum Roxana S. Ferris 1917-4-14 597 Colusa 5 miles west of Arbuckle, Arbuckle-Rumsey Road Comment
  CAS-BOT-BC216002  Eriodictyon californicum Roxana S. Ferris 1926-4-23 6431 A Colusa Near summit of grade on Williams - Stonyford Road Comment
  HSC65994  Eriodictyon californicum Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-1 49 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  POM257160  Eriodictyon californicum Lincoln Constance 1939-5-14 2488 Colusa Above Middle Fork of Stony creek 2.5 miles E of Bonnie View, Inner N Coast Ranges 518 Comment
  SD53208  Eriodictyon californicum D. F. Howe 1962-5-19 3284 Colusa 13 miles west of Williams on # 20 213 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
  UC71629  Eriodictyon californicum Miss Alice King 1905-1 Colusa College City Comment
  UCD72480  Eriodictyon californicum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3814 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
  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
  RSA216788  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Creek canyon N. of Highway 20 (near Wilbur Springs) Comment
  UC1392809  Eriogonum dasyanthemum R. F. Hoover 1968-5-27 11100 Colusa n, Bear Creek Canyon Highway 20 (near Wilbur Springs); Bear Creek Canyon Comment
  UCD61450  Eriogonum dasyanthemum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3894 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  CDA22488  Eriogonum dasyanthemum T. C. Fuller 1958-5-27 Colusa Highway 20, 1.5 miles west of junction with Highway 16. 0 Comment
  UCD69100  Eriogonum dasyanthemum P. Rodriguez-Rojo 1997-7-25 Colusa Walker Ridge Rd. On disturbed serpentine soils. UTM: 10SEP4425 890 Comment
  CAS-BOT-BC250371  Eriogonum gracile Roxana Stinchfield 1916-6-18 307 Colusa Near College City 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
  JEPS73500  Eriogonum luteolum var. luteolum L. R. Heckard 1972-7-10 3118 Colusa trail to Box Springs near Trout Creek crossing; Snow Mt., Trout Creek 1828 Comment
  CHSC32770  Eriogonum nervulosum James Jokerst 1980-6-27 921 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  CHSC75622  Eriogonum nudum var. nudum Vernon H. Oswald; Lowell Ahart 1999-6-22 9771 Colusa Fouts Spring Rd. (M10) 6.1 mi west of Stonyford-Elk Creek Rd. 548 Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  IRVC29687  Eriogonum nudum var. pubiflorum Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5031 Colusa Snow Mtn; Summit Spring Trail; 1.4km W of Snow Mtn West summit; 800m N of Cedar Camp. Southern Northern Inner Coast Ranges 1989 Comment
  RSA133246  Eriogonum spergulinum var. reddingianum Peter H. Raven, Richard Snow 1959-9-11 14419 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  CHSC33915  Eriogonum strictum var. greenei James Jokerst 1980-8-6 1048 Colusa North Coast Ranges. Near Snow Mountain. 484 Comment
  CHSC92619  Eriogonum strictum var. greenei D. Isle 2005-8-1 1156 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile South of Goat Mountain lookout. 1804 Comment
  JEPS75747  Eriogonum strictum var. greenei L. R. Heckard, and R. Bacigalupi 1976-9-6 4422 Colusa above Summit Springs (along trail to Fout's Camp); Colusa-Lake County Line, Snow Mt. 1645 Comment
  JEPS80805  Eriogonum strictum var. greenei L. R. Heckard and J. C. Hickman 1981-7-30 5776 Colusa about 2.5 km on ridge running e from West Peak; Snow Mt. 2011 Comment
  CAS-BOT-BC267413  Eriogonum tripodum G. L. Stebbins 1972-6-25 9001 Colusa East side of Black Diamond Ridge, 5 miles northwest of Stonyford 579 Comment
  SBBG83902  Eriogonum tripodum L. F. LaPre 1986-5-30 Colusa 1.5 mi W of Mendocino Nat Forest boundary on Stony Crk Rd; T18N, R7W, S34 670 Comment
  UC1221009  Eriogonum tripodum Beecher Crampton 1963-6-11 6850 Colusa ca. 2 mi s Lodoga 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
  RSA713163  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa Mendocino National Forest: Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile south of Goat Mountain Lookout. 1805 Comment
  UCD101410  Eriogonum umbellatum var. bahiiforme Beecher Crampton 1963-6-11 6850 Colusa 2 miles south Lodoga. Comment
  HSC41864  Eriophyllum lanatum K. Irwin 1977-4-24 300 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 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
  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
  UCR233439  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2011-4-1 17127 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  CAS-BOT-BC308100  Eriophyllum lanatum var. achilleoides Roxana S. Ferris 1926-4-23 6445 Colusa Near top of Grapevine Grade between Stonyford and Sites Comment
  JEPS34737  Eriophyllum lanatum var. achilleoides W. L. Jepson 1938-6-9 18962 Colusa mountains between Indian Valley, Lake County, and Bear Valley, Colusa County (Complexion Canyon, hillslope); Complexion Canyon 579 Comment
  UCD70241  Eriophyllum lanatum var. grandiflorum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCD57557  Erodium cicutarium Cindy Yip; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. 304 Comment
  UCD64269  Erodium cicutarium Craig D. Thomsen 2000-3-31 2066 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
  UC727670  Eryngium castrense Milo S. Baker 1946-9-4 11611 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CDA38319  Eryngium castrense Kingwell 1930-5-2 s.n. Colusa [no additional data] 0 Comment
  CDA24852  Erysimum capitatum G. D. Barbe, T. C. Fuller 1986-3-6 4260 Colusa Leesville Grade west of Williams. 0 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
  UCD68111  Erysimum capitatum Kathleen A. Robson 1981-5-23 33 Colusa From Stonyford, take Fouts Springs Road 12 miles West, past Fouts Springs to Letts Lake, Mendocino National Forest. Growing on a steep roadcut bank at entrance to lake, on loose dry soil, in full sunlight, individual plants not very abundant in area. Flowers, bright orange. 1219 Comment
  RSA590193  Erysimum capitatum var. capitatum Michael A. Vincent, Robert M. Rhode 1996-3-30 7287 Colusa Along Bear Valley Rd. above Bear Creek, 0.6 mi. N jct. Wilbur Springs Rd. Comment
  JEPS120998  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  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
  CHSC94518  Erythranthe guttata Lowell Ahart 2006-8-22 13224 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CHSC106250  Erythranthe microphylla B. Castro; L. P. Janeway 2001-6-3 1254 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 1.7 mi (air) south of Bartlett Springs Road. 798 Comment
  CHSC35129  Erythranthe microphylla K. R. Stern 1980-5-5 6628 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC94638  Erythranthe nudata Lowell Ahart 2006-6-11 12663 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
  UCR206723  Eschscholzia George K. Helmkamp, E. A. Helmkamp 2009-3-17 14393 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  CAS-BOT-BC402663  Eschscholzia caespitosa Roxana S. Ferris 1926-4-23 6426 Colusa Summit of grade, Williams - Stonyford Road Comment
  HSC45679  Eschscholzia caespitosa Catherine Chin 1978-4-22 26 Colusa Bear Valley Rd., 1.5 miles from its junction with State Rte. 20 412 Comment
  HSC62925  Eschscholzia caespitosa Marla J. Carollo 1979-4-14 36 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20 412 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-BC5882  Eschscholzia caespitosa Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  RSA293185  Eschscholzia caespitosa subsp. caespitosa J. P. Smith, Tom Nelson, Jane Nelson 1978-4-2 9560 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UCD57627  Eschscholzia californica Michele Lanctot; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. 356 Comment
  CAS-BOT-BC402978  Eschscholzia californica Roxana S. Ferris 1917-4-14 603 Colusa 3 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC5887  Eschscholzia californica var. crocea Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified Comment
  SEINET2442355  Eucalyptus camaldulensis George K. Helmkamp, E. A. Helmkamp 2009-1-31 14319 Colusa Sacramento Valley: Jameson Road 1.3 miles north of its junction with Lurline ROad and south of Harbison Road, generally west of the city of Colusa. 16 Comment
  CHSC78673  Eucalyptus tereticornis L. P. Janeway; B. Castro 2000-5-3 6701 Colusa Sacramento Valley. Along Hwy 99W 0.2 km north of Wadleigh Road; about 3.2 km north of Maxwell. 25 Comment
  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
  UCD55467  Euphorbia serpillifolia Ellen Dean; Gordon Harrington 2006-10-6 3292 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
  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
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  CDA15551  Euthamia occidentalis G. F. Hrusa 1998-10-28 14902 Colusa North Coast Ranges; Little Stony Ck. along Cedar Camp Rd. as it enters cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  UCD61475  Extriplex joaquinana Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3896 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/4 mile SW of parking lot. 399 Comment
  UCD66909  Extriplex joaquinana Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Southwest of Cowboy Camp on the west side of Bear Creek. Ridge to the north of spring box. 365 Comment
  CHSC110865  Festuca arundinacea David Isle 1989-5-14 1997 Colusa Pendell Ranch ~2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road; In black adobe soil ~150 yds south of Pendell home. 384 Comment
  UC2016538  Festuca bromoides Richard Olmstead 1984-4-29 530 Colusa On slopes by Walker Ridge Road 2.4 mi N of Calif. 20. Road follows ridge that is Lake/Colusa Co. line. Comment
  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
  JEPS80815  Festuca elmeri L. R. Heckard and J. C. Hickman 1981-7-31 5788 Colusa e side Snow Mt. (trail from Foutch Camp to Box Springs) 1524 Comment
  CHSC112210  Festuca microstachys var. pauciflora Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18636 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  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
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville Comment
  CAS-BOT-BC62916  Frangula californica subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa Oak Grove - Phillip's Ranch. Comment
  CAS-BOT-BC62917  Frangula californica subsp. tomentella C. Hart Merriam 1923-5-9 s.n. Colusa Stony Ford. Comment
  HSC48172  Frangula californica subsp. tomentella Thomas W. Nelson, Jane P. Nelson 1978-4-29 3936 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD55463  Frangula californica subsp. tomentella Ellen Dean; Gordon Harrington 2006-10-6 3287 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  CAS-BOT-BC223843  Frankenia palmeri Roxana Stinchfield 1916-7-11 450 Colusa Colusa - Williams Road the trough Comment
  CAS-BOT-BC223368  Fraxinus dipetala Mrs. H. C. Cantelow 1936-4-11 1193 Colusa Bear Creek Comment
  HSC66135  Fraxinus dipetala Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 47 Colusa On Bartlett Springs Rd. Comment
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Aug 13 2014
  UCD70234  Fraxinus dipetala D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 450 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
  UCD162981  Fritillaria affinis Craig D. Thomsen 2002-2-7 2568 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 1.5 miles west of Hwy 20/16 intersection. 345 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-BC130330  Fritillaria glauca Greg de Nevers; S. Charnley 1995-5-27 10734 Colusa Snow Mountain 2133 Comment
  CAS-BOT-BC130433  Fritillaria pluriflora James Jokerst 1985-4-10 2229 Colusa Near Walker Ridge Comment
  CAS-BOT-BC130437  Fritillaria pluriflora Arthur Menzies; Barbara Menzies 1968-3-22 s.n. Colusa Bear Valley (Between Wilbur Springs & Leesville) Comment
  CHSC52363  Fritillaria pluriflora Henricus C. Jansen 1980-3-1 Colusa Along both sides of Lodoga-Leesville, 0.8 mi S of intersection with Stony(?) Sites Rd. 371 Comment
  HSC33041  Fritillaria pluriflora Thomas W. Nelson, James Nelson 1975-3-26 1772 Colusa Beside rd. to Bear Valley 7 mi. N of junction with Hwy. 20 Comment
  JEPS89227  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  RSA297923  Fritillaria pluriflora W. Roderick 1968-3-10 s.n. Colusa On Hwy 20 (Williams-Clear Lake), 0.5 mile from Lake Co. Line Comment
  UCD163302  Fritillaria pluriflora Craig D. Thomsen 1997-4-7 1893 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  UCD148574  Fritillaria purdyi G. Ledyard Stebbins 1985-5-19 C 531 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
  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
  HSC59112  Fritillaria purdyi Terry Roth 1979-4-14 10 Colusa 1067 Comment
  CDA14917  Galium andrewsii G. F. Hrusa 1993-5-2 10862 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Above Frenzel Creek, tributary of Little Stony Creek. Comment
  UCD66537  Galium andrewsii Craig D. Thomsen 2001-5-24 2496 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCD66703  Galium andrewsii Craig D. Thomsen 2001-4-12 2451 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
  CHSC43737  Galium andrewsii subsp. andrewsii Vernon Oswald 1986-5-12 2012 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi W of Bear Valley Rd. 487 Comment
  JEPS120712  Galium andrewsii subsp. andrewsii Lowell Ahart 2013-10-1 19067 Colusa Near a small drainage, north of the wash and State Highway 20, just east of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  JEPS52790  Galium andrewsii subsp. andrewsii Lauramay T. Dempster and G. L. Stebbins 1965-5-21 4096 Colusa Hwy 20 along creek 1 mi w junction with Hwy 16; Bear Creek 335 Comment
  JEPS52809  Galium andrewsii subsp. intermedium Lauramay T. Dempster and G. L. Stebbins 1967-4-8 4355 Colusa Hwy 20 along creek 1 mi w junction with Highway 16; Bear Creek 329 Comment
  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
  CDA14919  Galium bolanderi G. F. Hrusa 1993-5-2 10860 Colusa North Coast Ranges; Frenzel Creek Research Natural Area. Mendocino National Forest. Mid-canyon of Frenzel Creek. Comment
  CDA15479  Galium californicum subsp. flaccidum G. F. Hrusa, WTD 1998-6-19 14616 Colusa North Coast Ranges; Goat Mtn. Rd. approx. 1 km. below intersection with USFS Pacific Ridge Rd. (M5). Comment
  CHSC32201  Galium grayanum James Jokerst 1980-8-8 1079 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UC1051748  Galium parisiense Helen K. Sharsmith 1953-6-18 4259 Colusa near Fouts Springs (above Mill Creek); Inner North Coast Ranges, Mendocino National Forest 609 Comment
  UCD72471  Galium parisiense Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3805 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
  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
  UC1212112  Galium porrigens Francia Chisaki and Gene B. Newcomb 1958-6-19 1166 Colusa on John Smith Road (Goat Mt.-Stonyford Road) Comment
  UCD57343  Galium porrigens Sergio Testa 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  UCD66527  Galium porrigens Craig D. Thomsen 2000-4-28 2228 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Comment
  UCD81242  Galium porrigens var. tenue Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5406 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Inside canyon that is located to the south of Brophy Canyon. 292 Comment
  JEPS23255  Galium sparsiflorum subsp. glabrius Francia Chisaki, Gene B. Newcomb 1958-6-19 1166 A Colusa John Smith Road (Goat Mt.-Stonyford Road) 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
  UCD121087  Garrya congdonii Frederic Hrusa 1989-2-7 5806 Colusa 2 miles off Stonyford-Lodoga Rd. up road to Cedar Mtn. Comment
  UCD121093  Garrya congdonii D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  CDA5308  Gaura neomexicana Kingwill Jun 1944 Colusa 0 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
  JEPS81279  Geranium carolinianum L. R. Heckard and J. C. Hickman 1982-7-5 5890 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UC73425  Geranium carolinianum Miss M. Alice King 1905-1 Colusa near Arbuckle (near College City); Sacramento Valley Comment
  UCR233360  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa Western Sacramento Valley, along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  CHSC75627  Geum macrophyllum Vernon H. Oswald; Lowell Ahart 1999-6-22 9781 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at Lily Pond. 1243 Comment
  UC1613427  Gilia Charles M. Belshaw April 1937 2869 Colusa vicinity Cook's Spring (Devil's Ridge); Inner Coast Range, Devil's Ridge Comment
  UC1614445  Gilia Charles M. Belshaw 1937-4-25 2834 Colusa vicinity Cook's Spring (Devil's Ridge); Inner North Coast Range, Devil's Ridge Comment
  RSA0014386  Gilia capitata Joan Stewart 1998-6-10 757 Colusa Bear Valley 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
  HSC45733  Gilia tricolor M. Alcasas 1978-4-22 35 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD82484  Gilia tricolor Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5671 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
  RSA388848  Gilia tricolor Virginia King 1975-4-20 9 Colusa Bear Valley Road, 8.7 miles north of State Highway 20 412 Comment
  SEINET5732135 Image available Gilia tricolor J. Maze 1971-1 869 Colusa About 1 mile from Stony Ford on road to East Gorge Reservoir.; Stony Ford Comment
  UCD82339  Gilia tricolor Robin McMaster 1973-4-15 325 Colusa Bear Valley. Comment
  SBBG128771  Gilia tricolor subsp. diffusa L. Ahart 2013-5-1 18684 Colusa near a small drainage, N of the wash and State Hwy 20, just E of Lake County Line, 12.2 mi (air) ENE of Clear Lake (town), 17.1 mi (air) W of Williams 566 Comment
  JEPS86605  Githopsis diffusa subsp. robusta L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6714 Colusa 0.5 mi ne Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1640 Comment
  SEINET10464453  Githopsis diffusa subsp. robusta Sharsmith 1953-6-19 SHARSMITH 4283 Colusa Near Trough Springs on Trough Springs Ridge; Mendocino National Forest 975 Comment
  UC71621  Githopsis specularioides Miss Alice King 1905-1 Colusa College City 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
  CHSC84958  Glinus lotoides Lowell Ahart 2003-10-23 10668 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  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
  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
  JEPS110101  Gnaphalium palustre Lowell Ahart 2006-8-9 13124 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC71765  Gnaphalium palustre H. P. Chandler 1905-10-14 Colusa Princeton Comment
  UCR227904  Gnaphalium palustre Ellen Dean 2008-6-8 5064 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwest corner of ranch, along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond 610 Comment
  CHSC115626  Gnaphalium palustre David Isle; Rhonda Isle 2014-9-27 2144 Colusa Northern Sacramento Valley foothills: W Side East Park Reservoir, ~0.3 mi S of boatlaunch, ~100 yds E of normal lake edge in muddy clay soil. (Gilmore Peak California: 10S -0541629E, 4355225N). 353 Comment
  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
  CAS-BOT-BC305304  Grindelia hirsutula Roxana Stinchfield 1916-7-11 455 Colusa Colusa--Williams Road at the trough Comment
  UC765013  Guillenia flavescens R. F. Hoover 1938-4-24 3222 Colusa Venado Comment
  UCD70228  Hainardia cylindrica 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
  UCD85141  Hainardia cylindrica Beecher Crampton 1953-4-29 1143 A Colusa Colusa County, 2 miles east of Maxwell. Comment
  UCD85150  Hainardia cylindrica Beecher Crampton 1958-6-27 4988 Colusa 3.5 miles south of Colusa. Comment
  CAS-BOT-BC230059  Harmonia hallii Ellen Dean; G. Harrington; K. Mawdsley; J. Shepard 2010-5-1 5966 Colusa Walker Ridge on border of Lake and Colusa Counties. Along Walker Ridge Rd., just E of Barrel Springs area 721 Comment
  UCD83665  Helenium Craig Thomsen; G. Harrington 2009-5-12 2859 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CAS-BOT-BC306371  Helenium bigelovii Volney Rattan 1877-6-26 s.n. Colusa Sulphur Cr. 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
  CHSC112644  Helianthus bolanderi Lowell Ahart 2013-10-1 19071 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  RSA718200  Helianthus bolanderi L. Ahart 2006-8-9 13097 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UCD55444  Helianthus bolanderi Ellen Dean; Gordon Harrington 2006-10-6 3269 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Southernmost tip of ranch at the confluence of Bear and Cache Creeks. Along Bear Creek just downslope of State Route 16. 198 Comment
  RSA7606  Helianthus bolanderi C. B. Wolf 1955-6-25 5505 Colusa West side of Bear Valley, near mitchell Ranch House. Inner north coast Range. Upper Sonoran Digger River 305 Comment
  JEPS120804  Heliotropium curassavicum Lowell Ahart 2013-10-1 19096 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCD72399  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5124 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Confluence of Cache and Bear Creeks at southern tip of ranch. 198 Comment
  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
  RSA0105551  Heliotropium curassavicum subsp. oculatum Lowell Ahart 2013-10-1 19096 Colusa Inner North Coast Range. 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
  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
  JEPS83161  Hemizonia congesta subsp. clevelandii L. R. Heckard and J. C. Hickman 1980-9-15 5418 Colusa slopes w Summit Springs; Snow Mt. 1554 Comment
  CAS-BOT-BC306025  Hemizonia congesta subsp. clevelandii R. F. Hoover 1938-6-11 3596 Colusa Williams-Lake County highway, at junction of Wilbur Springs road 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
  UCD61448  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3893 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1500 ft NW of parking lot. 368 Comment
  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
  UCD70224  Hemizonia luzulifolia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Annual grasslands growing on ultramafic soils. 370 Comment
  UCR141662  Hemizonia pungens subsp. septentrionalis Jerry Schmierer 1999-4-27 s.n. Colusa Sacramento Valley, Colusa County Comment
  JEPS75707  Heracleum lanatum Alice Q. Howard 1972-7-10 10 Colusa stream crossing trail between Fouts Camp and Box Springs (lower of 2 wet places along trail on n. side of ridge separating Trout & Paradise Creeks, Snow Mt.); Snow Mt. 1600 Comment
  CHSC76742  Hesperevax caulescens J. Marr; H. West, C. Warren 1998-4-14 Colusa NW of town of Sites, vicinity of Grapevine and Stone Corral Creeks. 158 Comment
  UCR261649  Hesperevax sparsiflora var. sparsiflora Ann Howald 2003-4-24 2319 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
  SD40656  Hesperocyparis sargentii Carl B. Wolf, E. R. Johnson 1934-10-15 Colusa Cook Springs (western part of county) 550 Comment
  UCD82619  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2887 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CHSC71435  Hesperolinon californicum Vernon H. Oswald; Lowell Ahart 1998-7-15 9269 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. 487 Comment
  JEPS122888  Hesperolinon californicum Adam C. Schneider with Will Freyman and Yuri P. Springer 2014-5-20 642 Colusa Along north side of Brim Rd east of Indian Valley Reservoir, near Colusa/Lake Co line. Comment
  UC1212442  Hesperolinon californicum Herbert L. Mason 1946-5-31 12815 Colusa 1 mi e Lake County line (Bartlett Springs to Williams road, western Colusa County); Inner North Coast Ranges Comment
  UC1212465  Hesperolinon californicum Helen K. Sharsmith 1959-5-27 4695 Colusa foot grade on Lower Lake to Williams road (w side of valley); Inner North Coast Ranges, Bear Valley 426 Comment
  UCD110497  Hesperolinon californicum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCR261748  Hesperolinon californicum Ann Howald 2003-5-29 2347 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
  UC1552829  Hesperolinon californicum Frederica Bowcutt 1985-5-5 511 Colusa nw Wilbur Springs; Big Valley Shale Barrens Comment
  HSC96809  Hesperolinon disjunctum L. Ahart 2006-6-11 12675 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  RSA700361  Hesperolinon disjunctum L. P. Janeway 2001-6-6 7128 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  UC1212485  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-21 4303 Colusa slopes of Little Stony Creek ca 1 mi within forest boundary; Inner North Coast Ranges, Mendocino National Forest 670 Comment
  UC1212486  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-17 4249 Colusa one mi beyond origin of Wilbur Springs road from State Hwy 20 Inner North Coast Ranges, Bear Creek drainage 335 Comment
  UC1212488  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4696 Colusa foot grade on Lower Lake to Williams road (w side of valley); Inner North Coast Ranges, Bear Valley 426 Comment
  UC1212491  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4255 Colusa road between Fouts Springs and Stoneyford; Inner North Coast Ranges, Mendocino National Forest, Candy B 609 Comment
  UC1212512  Hesperolinon disjunctum Herbert L. Mason 1946-5-31 12813 Colusa one mi e Lake County line (Bartlett Springs to Williams road); Inner North Coast Ranges 609 Comment
  UC1552831  Hesperolinon disjunctum Frederica Bowcutt 1985-5-5 507 Colusa ca 1 mi nw Wilbur Springs Comment
  UC1601227  Hesperolinon disjunctum Helen K. Sharsmith 1959-5-27 4693 a Colusa Cook Springs Inner North Coast Ranges 548 Comment
  RSA262575  Hesperolinon disjunctum Marilyn Ivey 1973-5-19 55 Colusa 1.5 miles up Wilbur Springs Road north off of State Highway 20. Comment
  SD51665  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa 1.0 mile beyond Wolf Glade on spusr road, drainage of Stoney Creek, Mendocino National Forest. 609 Comment
  CAS-BOT-BC167448  Hesperolinon drymarioides Helen K. Sharsmith 1952-6-21 4159 Colusa North canyon slope overlooking Cook Springs 548 Comment
  JEPS122820  Hesperolinon drymarioides W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 289 Colusa 200 feet up slope from end of Cook Springs Road west off of Leesville Lodoga Road south of Lodoga. Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD83448  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2888 Colusa Colusa County on Walker Ridge: Eaton Springs, about 1 mile east of Walker Ridge Road. 710 Comment
  CHSC94643  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
  JEPS75717  Heterocodon rariflorum L. R. Heckard 1974-9-9 3843 Colusa just se Foutch Camp (Snow Mt.); Snow Mt. 1889 Comment
  CDA16130  Heteromeles arbutifolia G. F. Hrusa 1999-2-13 14913 Colusa North Coast Ranges; Along Little Stony Creek, on road to Cedar Camp and Goat Mtn. 0 Comment
  HSC87080  Heteromeles arbutifolia Anthony J. Desch, Bryon Cariss 1988-4-16 35 Colusa 2 mi. W on Brim Rd. from corner of Brim Rd. and Bear Valley Rd. 518 Comment
  UCD83759  Heteromeles arbutifolia Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5955 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 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
  SEINET6710046  Heteromeles arbutifolia var. macrocarpa R. R. Halse 2012-3-29 8458 Colusa Along State HWY 20, just east of the Lake County Line about 14.6 miles east of the junction with State HWY 558 Comment
  JEPS2447  Heterotheca oregona var. rudis W. L. Jepson 1887-9-17 14677 Colusa in bed of Putah <Creek> Putah Comment
  JEPS15028  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa Butte Sink, near gate of Colusa Gun Club 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
  JEPS73514  Hieracium albiflorum L. R. Heckard 1972-7-10 3132 Colusa 3 mi nw Fouts Springs (near promontory on se corner of Snow Mt.); Snow Mt. 1828 Comment
  SEINET10946628  Hippuris vulgaris Andrew Townesmith, Karen M. Meyer 2007-8-7 Townesmith 914 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
  CHSC94446  Hirschfeldia incana Lowell Ahart 2006-8-9 13155 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD163858  Hoita macrostachya Craig D. Thomsen 2001-5-31 2538 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. Comment
  UCD164149  Hoita macrostachya Craig Thomsen 1997-6-21 1930 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  CDA20339  Holocarpha virgata D. Brown 2001-10-17 PDR 024366 Colusa Northern California; Vicinity of Colusa 0 Comment
  UC725605  Holocarpha virgata subsp. virgata A. A. Heller 1940-6-7 15721 Colusa road to Sites; Lodogo Comment
  UCD55458  Holocarpha virgata subsp. virgata Ellen Dean; Gordon Harrington 2006-10-6 3282 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
  UC194239  Holocarpha virgata subsp. virgata H. M. Hall 1916-8-16 10270 Colusa near Arbuckle Comment
  RSA28813  Holodiscus discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade 3 miles W of Leesville. Comment
  CHSC110423  Hordeum brachyantherum David Isle 1990-5-6 1982 Colusa Stony Creek Watershed. Pendell Ranch about 2 mi W of Co. Rd. 306 jct. with Fouts Springs Road; abt 150 yds south of Pendell home. 384 Comment
  CHSC110864  Hordeum brachyantherum David Isle 1989-5-14 1995 Colusa Stony Creek Watershed. Pendell Ranch ~2 miles W of Co. Rd. 306 Jct. w/ Fouts Springs Road; ~150 yds south of Pendell home. 384 Comment
  UCD20203  Hordeum brachyantherum J. McCaskill 1963-5-12 s.n. Colusa Bear Valley, on road from State Hwy 20 to Leesville, 12.2 miles north of junction of Hwys 20 and 16. Comment
  UCD70230  Hordeum brachyantherum D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Perennial plant communities close to serpentine temporal vernal pools. 370 Comment
  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
  CHSC106241  Hordeum brachyantherum subsp. californicum B. Castro; L. P. Janeway 2001-6-3 1260 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
  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
  CAS-BOT-BC284988  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  JEPS120993  Hordeum depressum Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18637 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  CHSC107165  Hordeum marinum subsp. gussoneanum L. P. Janeway; B. Castro 2011-4-27 10243 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. North edge of large wetland. 49 Comment
  POM197357  Hordeum marinum subsp. gussoneanum Le Roy Abrams 1928-5-8 12593 Colusa 2 miles south of Arbuckle Comment
  CHSC110839  Hordeum marinum subsp. gussoneanum David Isle 1989-5-14 1999 Colusa Stony Creek Watershed. Pendell Ranch--2 miles W of Co. Rd. 306 Jct w/ Fouts Ssprings Road. 150 yards south of Pendell home. 384 Comment
  RSA669471  Hordeum murinum subsp. glaucum R. R. Halse 2001-3-22 5946 Colusa Williams, along vacant lot by 455-4th street. 18 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
  JEPS80831  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1981-8-1 5803 Colusa s. side Snow Mt. (lower Foutch Camp Meadow) 1844 Comment
  SEINET255491  Hypochaeris glabra Richard R. Halse 2007-3-25 7122 Colusa Along State Hwy. 20 ca. 7.8 miles northeast of its junction with State Hwy. 16, at base of Salt Canyon. 100 Comment
  UCD82523  Iris macrosiphon Craig Thomsen; G. Harrington 2009-5-12 2880 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
  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
  UCD58172  Iva axillaris Gordon Harrington 2007-5-31 62 Colusa BLM Payne Ranch. Lands to the SW of the intersection of Hwy 16 and Hwy 20. Along Thompson Creek, approximately 1 mile downstream from Road Kill Cafe. 336 Comment
  CHSC107947  Juncus balticus subsp. ater B. Castro; Amy Lyons 2011-2-9 1830 A Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 400 ft northeast of Tehama-Colusa Canal. Large +- saline/alkaline wetland/ seasonal marsh. Western of the two Juncus patches at the south edge of the marsh. 49 Comment
  CHSC49606  Juncus bolanderi Vernon Oswald 1984-7-20 1619 Colusa Letts Lake in Mendocino National Forest. 1402 Comment
  JEPS121120  Juncus bufonius var. bufonius Lowell Ahart 2013-5-1 18691 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCSB63777  Juncus bufonius var. bufonius Oswald, Vernon; Ahart, Lowell 1998-7-15 Colusa West side of county on Walker Ridge Rd; 8.2 mi south of Bartlett Springs Rd; 6.3 mi north of Hwy. 20; T14N R6W Sect. 12 Comment
  CHSC86963  Juncus bufonius var. congestus B. Castro; Michelle Cedarborg 2003-5-1 1425 Colusa Vicinity of Logan Ridge, Sites Peak and Lurline Creek. In wet mud just downstream of pond at creek headwaters. 205 Comment
  JEPS91291  Juncus bufonius var. occidentalis Dean W. Taylor 1988-3-24 9463 B Colusa Colusa National Wildlife Refuge, on Ohm Road ca. 0.5 miles North of Ware Road 24 Comment
  JEPS75718  Juncus covillei L. R. Heckard 1974-9-9 3844 Colusa just se Foutch Camp; Snow Mt. 1889 Comment
  JEPS73444  Juncus howellii L. R. Heckard 1972-7-8 3039 Colusa ridge running se of Snow Mt., West Peak 2011 Comment
  JEPS80257  Juncus occidentalis L. R. Heckard, and J. Hickman 1980-9-15 5435 Colusa n of Summit Springs (n side of road); Snow Mt. 1524 Comment
  CHSC88579  Juncus oxymeris L. P. Janeway 2001-6-6 7115 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  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
  CHSC118858  Juncus phaeocephalus var. paniculatus David Isle; Frank Pendell 2017-5-17 2174 Colusa Footheills E edge of N Coast Range: W of Stonyford ~1.5 miles on 18N01.1 to Frank andsheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile 381 Comment
  CHSC118863  Juncus phaeocephalus var. paniculatus David Isle; Rhonda Isle 2017-6-5 2176 Colusa Foothills E edge of N Coast Range: W of Stoneyford ~1.5 miles on 18N01.1 ro Frank and Sheri Pendell Ranch; in black adobe pasture S of house 1/8 mile. 381 Comment
  UCD169280  Juncus usitatus Lowell Ahart 2007-7-7 14258 Colusa About 17 miles west of Gridley, About 1 1/4 miles east of River Road, on the south side of the Gridley Colusa Highway, south of the wire fence. 20 Comment
  JEPS118670  Juncus xiphioides L. P. Janeway and B. Castro 2011-5-19 10289 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.9 km southeast of Funks Reservoir and 0.2 km northeast of Tehama-Colusa Canal. Comment
  CHSC45225  Juniperus californica Lowell Ahart 1971-6-10 78 Colusa North-east of Sites. 76 Comment
  CHSC79433  Juniperus californica B. Castro; L. P. Janeway 2000-5-1 1102 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  UCD163315  Juniperus californica Craig D. Thomsen 1997-4-13 1904 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. 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
  JEPS108915  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
  CHSC111213  Keckiella lemmonii David Isle 1990-7-11 2056 Colusa W of Fouts Springs; ~1mi below (E of) Sanborn Cabin Rd 17N63 Jct w/ 18N01 on edge 18N01; Adjacent Mixed Confer-Hardwood Forest. 877 Comment
  CHSC32198  Kelloggia galioides James Jokerst 1980-8-8 1083 Colusa North Coast Ranges. Near Snow Mountain (west). Comment
  UCR261653  Koeleria gerardi Ann Howald 2003-4-24 2321 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, spillway overlook 368 Comment
  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
  UCD82476  Lactuca Craig Thomsen; G. Harrington 2009-5-12 2854 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC80155  Lactuca saligna B. Castro; G. Kuenster 2000-7-19 1211 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low flat terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 39 Comment
  UCD66874  Lactuca saligna Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5077 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thomspon Creek headwaters and loops back to Ridge trail. Large, dammed stock pond, holding water still in middle of meadow. Comment
  CAS-BOT-BC341395  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa Ridge between Venado and Leesville Comment
  CHSC112312  Lagophylla minor Lowell Ahart 2013-5-1 18680 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  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
  HSC96892  Lagophylla minor L. Ahart 2006-6-11 12667 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  JEPS110184  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
  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
  UCD82162  Lagophylla minor Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5694 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCR227339  Lagophylla minor Craig D. Thomsen 2000-5-11 2303 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  CDA8085  Lagophylla minor Vernon H. Oswald & Lowell Ahart 1998-5-7 8998 Colusa Bartlett Springs Road 2.1 miles west of Bear Valley Road, 0.8 mile east of Sawtelle Valley and Grapevine Flat roads. Comment
  JEPS119421  Lagophylla ramosissima G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14740 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 Comment
  JEPS80244  Lagophylla ramosissima L. R. Heckard and J. Hickman 1980-9-15 5419 Colusa slopes w of Summit Springs; Snow Mt. 1554 Comment
  UCD133623  Lagophylla ramosissima P. B. Kennedy 1928-9-15 s.n. Colusa Cortena. Comment
  UCD159332  Lagophylla ramosissima D. S. Park 2010-6-5 116 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  UCD135735  Lagophylla ramosissima Bruce G. Baldwin 1986-6-1 484 Colusa 3.2 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  CHSC92766  Lagophylla ramosissima subsp. congesta D. Isle 2005-6-3 1165 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In field on Isle property just west of Salt Creek, Stonyford. Comment
  CHSC77915  Lasthenia californica Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 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
  UCD163305  Lasthenia californica Craig D. Thomsen 1997-4-7 1896 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  CAS-BOT-BC337916  Lasthenia californica Joshua Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 46 Colusa Along Bear Valley Rd., 1.2 miles west of the junction with Brim Rd. 414 Comment
  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
  CAS-BOT-BC353480  Lasthenia fremontii A. A. Heller 1921-4-10 13546 Colusa Near Colusa Comment
  CAS-BOT-BC353481  Lasthenia fremontii Roxana S. Ferris 1917-4-12 531 Colusa 4 miles E of Williams Comment
  UC90070  Lasthenia fremontii T. S. Brandegee Apr 1889 Colusa Stites 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-BC353479  Lasthenia fremontii Mrs. Alvin Seale 1932-4-17 s.n. Colusa unspecified Comment
  CHSC107929  Lasthenia glaberrima B. Castro; L. Janeway 2011-4-27 1862 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 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
  JEPS118673  Lasthenia glaberrima B. Castro and L. P. Janeway 2011-4-27 1862 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Sites 7.5' quad. Comment
  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
  CHSC29752  Lasthenia glabrata K. R. Stern 1980-4-1 6619 Colusa Vernal pool, south border area of Delevan National Wildlife Refuge. 48 Comment
  CAS-BOT-BC328109  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1917-4-12 503 Colusa 4 miles E of Williams Comment
  CAS-BOT-BC352770  Lasthenia glabrata subsp. glabrata Lewis S. Rose 1936-4-27 36184 Colusa 15 mi. NW of Rumsey 304 Comment
  RSA293117  Lasthenia glabrata subsp. glabrata J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9529 Colusa Bear Valley Road, 5 miles from its junction with State Route 20. 390 Comment
  UC1049545  Lasthenia glabrata subsp. glabrata Rimo Bacigalupi 1950-4-16 3124 Colusa Bear Valley Comment
  JEPS80788  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1981-7-30 5761 Colusa se side of Snow Mountain, Trout Creek Trout Creek; Snow Mountain, Trout Creek 1584 Comment
  JEPS81323  Lathyrus jepsonii var. californicus L. R. Heckard and J. C. Hickman 1982-7-6 5938 Colusa about 0.5 mi ne Summit Springs (e of trail, s side of Snow Mt.); Snow Mt. 1645 Comment
  HSC95805  Lathyrus vestitus subsp. vestitus A. Skelly, B. Bletcher, G. McCabe 1996-3-30 10 Colusa 1.6 mi. W of Bear Valley Rd. and Brim Rd. on Brim Rd., 14.7 mi. on Walker Ridge Rd. to Brim Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Leesville Comment
  CAS-BOT-BC323887  Layia chrysanthemoides Alice Eastwood 1922-4-24 11191 Colusa Road between Princeton & Norman. Comment
  CDA11406  Layia chrysanthemoides G. F. Hrusa, K. van Katwyk 1995-4-22 12127 Colusa Inner North Coast Ranges; Bear Valley, 15 m. N of Hwy. 20. Comment
  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
  JEPS13437  Layia chrysanthemoides R. F. Hoover 1938-4-24 3221 Colusa Williams Comment
  JEPS13438  Layia chrysanthemoides R. F. Hoover 1938-4-24 3224 Colusa Venado Comment
  UC638649  Layia chrysanthemoides Ethel Crum 1938-5-8 2037 Colusa four mi s of Leesville; Bear Valley 426 Comment
  UCD162975  Layia chrysanthemoides Jack Major 1963-5-4 s.n. Colusa Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 396 Comment
  UCD163205  Layia chrysanthemoides Craig D. Thomsen 2000-3-31 2073 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
  UCD163672  Layia chrysanthemoides Craig Thomsen 1999-4-15 1973 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CAS-BOT-BC323904  Layia chrysanthemoides Roxana S. Ferris 1917-4-12 506 Colusa 4 miles E of Willaims. Alkali Plains. 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
  UC89185  Layia gaillardioides Katharine Brandegee Apr 1889 Colusa Leesville Comment
  CHSC110419  Layia platyglossa David Isle; Rhonda Isle; Hank Switzer 2011-4-14 1950 Colusa North Coast Ranges. Bear Valley on S edge of Bear Valley R. MDBM. Comment
  CHSC65801  Layia platyglossa L. P. Janeway; B. Castro, Linnea Hanson, Beth Corbin, Kim Earl 1995-4-28 4761 Colusa Southern end of Bear Valley just west of where the road crosses Bear Creek. 396 Comment
Read comments
May 24 2013
  HSC92539  Layia platyglossa S. Morrissette, J. Williams, K. Kopper 1994-4-24 23 Colusa Bear Valley Rd., approx. 1.3 miles south of junction with Brimm Rd. 412 Comment
  HSC96795  Layia platyglossa J. Carey, A. Hong, J. Leffingwell 1995-4-1 31 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 Comment
  UCD15426  Layia platyglossa Margit Sands 1985-4-13 29 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd. 390 Comment
  UCD163306  Layia platyglossa Craig D. Thomsen 1997-4-20 1909 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  CAS-BOT-BC380897  Layia platyglossa Ethel Crum 1936-5-8 2036 Colusa Bear Valley 4 miles south of Leesville 426 Comment
  CAS-BOT-BC329322  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa Summit of ridge, Comanche Hills, 4 miles NE of Rumsey 254 Comment
  JEPS13435  Layia septentrionalis R. F. Hoover 1938-4-23 3206 Colusa grade on Rumsey; Arbuckle road Comment
  JEPS13436  Layia septentrionalis R. F. Hoover 1938-4-24 3213 Colusa Upper Sand Creek Comment
  UC638682  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa 4 mi ne of Rumsey; Comanche Hills 254 Comment
  POM313214  Leersia oryzoides H. L. Mason 1945-9-19 12715 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile above Colusa. Comment
  UCD57078  Leersia oryzoides Beecher Crampton 1963-9-9 6888 Colusa 1/4 mile E of Cortena. Comment
  CAS-BOT-BC527264  Lemna gibba A. A. Heller; H. E. Brown 1902-5-19 5571 Colusa Near Colusa Comment
  JEPS127105  Lemna minuta Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20723 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  UC1107309  Lemna trisulca J. M. Tucker and L. K. Mann and John Tothill 1959-5-30 3532 Colusa 1/4 mi nw of Lower Letts Valley (and 4 air mi n of Goat Mountain Lookout, in Mill Valley); Mill Valley Comment
  CAS-BOT-BC527301  Lemna trisulca J. M. Tucker; L. K. Mann; John Tothill 1959-5-30 3532 Colusa On small lake in Mill Valley, ca. 1/4 mile northwest of Lower Letts Valley and ca. 4 airline miles north of Goat Mountain Lookout Comment
  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
  UCD138193  Lemna trisulca C. Richie Bell 1951-6-13 1167 Colusa below Letts Meadow on road from Bear Creek to Foutes Spring. 914 Comment
  UCD138208  Lemna trisulca J. M. Tucker; L. K. Mann, John Tothill 1959-5-30 3532 Colusa on small lake in Mill Valley, around 1/4 mile northwest of Lower Letts Valley, and around 4 miles, airline, north of Goat Mountain Lookout. Comment
  UCR225659  Leontodon taraxacoides Craig D. Thomsen, Gordon Harrington 2008-7-6 2777 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  UCD63714  Lepidium draba Craig D. Thomsen 2008-4-7 2724 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20. Comment
  UCD63721  Lepidium draba Craig D. Thomsen 2008-5-31 2761 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Along entry road into Cowboy Camp from Hwy 16, 1 mile south of Hwy 20. 320 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
  SD236244  Lepidium latifolium G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14257 Colusa Sacramento Valley; along River Road (generally following the Sacramento River), 1.1 miles north of Colusa (Meridian 7.5'Q) 17 Comment
  CHSC111210  Lepidium latifolium David Isle 2013-9-23 2050 Colusa Salt Creek N of Dennis Dr. bridge; Isle property. Comment
  CHSC115390  Lepidium nitidum var. nitidum Lowell Ahart 2015-4-1 19990 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
  UC596488  Leptochloa fascicularis R. F. Hoover 1936-7-31 1590 Colusa Maxwell Comment
  UCD63674  Leptochloa fusca subsp. fascicularis Hursh 1919-11-12 X 3341 Colusa Williams. Comment
  CAS-BOT-BC273929  Leptochloa fusca subsp. fascicularis James Moffett 1928-10-1 s.n. Colusa 5 miles north of Colusa Comment
  UCD163206  Leptosiphon bicolor Craig D. Thomsen 2000-3-31 2048 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163676  Leptosiphon bicolor Craig Thomsen 1999-4-15 1977 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC85856  Leptosiphon bicolor Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. 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
  UCD14331  Leptosiphon bicolor G. Robinson 1984-4-21 4 Colusa Colusa Co.; Bear Valley, ca. 40 meters west of Wilber Springs Road, east of creek, 3.2 miles north of Highway 20; 390 Comment
  CHSC19699  Leptosiphon ciliatus L. A. Wright Jr. 1971-3-27 6 Colusa Ca. 7 mi s of Williams on Hwy 30, on the n side of the road. 91 Comment
  CHSC25156  Leptosiphon ciliatus J. D. Sagray 1970-4-4 4 Colusa 15 mi w of Williams at the junction of Hwy 20 and 16. 350 Comment
  CHSC86028  Leptosiphon ciliatus 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
  UCD163880  Leptosiphon ciliatus Craig D. Thomsen 2002-3-27 2575 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  RSA232952  Leptosiphon ciliatus D. A. Young 1969-5-4 P- 325 Colusa Approx. 10 mi W. of Wilbur Springs along Hwy 16. 610 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
  CHSC70992  Leptosiphon parviflorus Vernon Oswald; Lowell Ahart 1998-5-7 9006 .1 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
  UCD63017  Leptosiphon parviflorus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4669 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the west of Cowboy Camp on the west side of Bear Creek. 404 Comment
  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
  CHSC91040  Lesquerella occidentalis subsp. occidentalis D. Isle 2003-6-24 376 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. On Colusa/Lake County line, 1/8 mi. SE of Goat Mt. Lookout. 1841 Comment
  NY180585  Lessingia nemaclada M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  POM51466  Lessingia nemaclada Katherine Brandegee 1889-04 s.n. Colusa Leesville Comment
  CAS-BOT-BC123028  Lessingia ramulosa M. K. Curran 1884-1-1 s.n. Colusa At Epperson's Comment
  CHSC112640  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD55454  Lessingia ramulosa Ellen Dean; Gordon Harrington 2006-10-6 3278 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  HSC31308  Lewisia rediviva Carter Schleicher 1974-5-4 25 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  JEPS73452  Lewisia triphylla L. R. Heckard 1972-7-8 3052 Colusa n side of ridge running se of Snow Mt. West 2011 Comment
  UC1146611  Leymus triticoides Freed W. Hoffman 1944-7-14 1954 Colusa Wilbur Springs North Coast Ranges 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
  CHSC75651  Lilium pardalinum subsp. pardalinum Vernon H. Oswald; Lowell Ahart 1999-6-22 9789 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  CDA34116  Limnanthes alba P. Hiatt 1979-4-26 7 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UCD33937  Limnanthes douglasii subsp. nivea Beecher Crampton 1958-4-21 9168 Colusa Colusa County, 2 miles W.N.W. of Lodoga. Comment
  UC106857  Linanthus androsaceus Brandegee 1889-1 Colusa Comment
  CDA11404  Linanthus ciliatus G. F. Hrusa, K. van Katwyk 1995-4-22 12125 Colusa Inner North Coast Ranges; Approx. 3 m. NW of Hwy 20 on Leesville Rd. Comment
  SEINET7096751  Linanthus ciliatus A. G. Vestal 1955-4-5 s.n. Colusa Along Route 16 about 0.2 miles south of Route 20 and near Bear Creek. NAD27, 39? deg. 00' 36ao, -122?_ 21' 22ao (converted to WGS84 decimal degrees) Comment
  UC1745721  Linanthus ciliatus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-7 1376 Colusa Open ridge crest 0.1-0.2 mi. W of summit of Rumsey-Arbuckle rd. 4.2 mi. from Rumsey. Comanche Hills (?). Comment
  CHSC53973  Linanthus dichotomus Vernon H. Oswald 1991-4-21 4519 Colusa Goat Mountain Rd, 0.4 mi southwest of Lodoga Stonyford Rd, south of Stonyford. 390 Comment
  UCD83820  Linanthus parviflorus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5967 Colusa Walker Ridge on border of Lake and Colusa Counties, just E of Barrel Springs area along Walker Ridge Rd. 721 Comment
  UCD118726  Linanthus pungens G. Ledyard Stebbins Jr. 1964-7-4 6172 Colusa Mt. St. John, west of Stonyford. 1676 Comment
  JEPS14626  Lithophragma Helen K. Sharsmith 1953-7-1 4403 Colusa above Linger Longer Camp Goat Mountain (Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1615 Comment
  UCD163884  Lithophragma affine Craig D. Thomsen 2002-4-10 2596 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.75 mile west of Hwy 20/16 instersection. Comment
  UCD58099  Lithophragma affine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3476 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  CDA34090  Lithophragma affine P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  UC71648  Lithophragma bolanderi Miss Alice King 1905-1 Colusa College City Comment
  CAS-BOT-BC432295  Lithophragma campanulatum Helen K. Sharsmith 1953-7-1 4403 Colusa above Linger Longer Camp, Goat Mountain, Mendocino National Forest 1615 Comment
  HSC92471  Lithophragma heterophyllum Brad Kerstetter, Roxanne Jackson, Jeff Cox 1995-5-6 52 Colusa Blue Oak Campground 549 Comment
  HSC72155  Lithophragma parviflorum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9568 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  SEINET8720321 Image available Lithophragma parviflorum Helen K. Sharsmith 1953-1 4403 Colusa Above Linger Longer Camp, Goat Mountain, Mendocino National Forest. 1615 Comment
  CHSC107938  Logfia filaginoides B. Castro; Joe Silveira, Tom Boullion 2011-6-10 1887 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Ca 100 ft E of large +- saline/alkaline wetland/marsh, on S edge of compacted E-W road track that goes through marsh. 49 Comment
  CHSC112234  Logfia filaginoides Lowell Ahart 2013-5-1 18678 Colusa Inner North Coast Ranges. On the north side of the of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC79454  Logfia filaginoides B. Castro; L. P. Janeway 2000-5-2 1119 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 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
  UCR206393  Lomatium George K. Helmkamp, E. A. Helmkamp 2009-3-11 14374 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  CHSC91217  Lomatium californicum D. Isle 2003-6-4 370 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. 0.2 mi. W of M-10/M-5 jct. on N. edge of M-10. 621 Comment
  UCD80835  Lomatium californicum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5292 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. South side of canyon that is located to the north of Brophy Canyon. 274 Comment
  SEINET13944353 Image available Lomatium caruifolium Milo S. Baker 1947-1 11646 Colusa Near hwy 20, about 1 mi E. of Lake-Colusa County line Comment
  CHSC32224  Lomatium ciliolatum James Jokerst 1980-8-6 1052 Colusa Near Snow Mountain (West). Comment
  SEINET13944350 Image available Lomatium ciliolatum Bonnie Prange 1974-1 sn Colusa Wilbur Springs Quad. Near Clyde Mine. Elev 2800 ft 853 Comment
  HSC45713  Lomatium dasycarpum subsp. tomentosum Sheila Logan 1978-4-22 73 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD163350  Lomatium dissectum Craig D. Thomsen 2000-5-12 2332 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  RSA396711  Lomatium hooveri Michelle Stevens 1979-4-14 15 Colusa Buck Flat on Walker Ridge Road 884 Comment
  UC1049547  Lomatium hooveri Rimo Bacigalupi 1950-4-16 3117 Colusa Bartlett Mt. Road, base of grade just W of Bear Valley, near Colusa-Lake County line 426 Comment
  UC1613425  Lomatium hooveri Charles M. Belshaw 1937-4-25 2827 Colusa Inner North Coast Range, Devils Ridge, Cooks Springs Comment
  UC903739  Lomatium hooveri Milo S. Baker 1947-4-6 11646 Colusa near Hwy. 20 ca. 1 mi. e. Lake-Colusa Co. line 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
  UCD163231  Lomatium hooveri Craig D. Thomsen 2001-4-12 2242 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 1 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163312  Lomatium hooveri Craig D. Thomsen 1997-4-18 1901 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCSC010456  Lomatium hooveri Dylan M. Neubauer, Tim Forsell 2016-3-31 601 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  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
  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
  JEPS121106  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa On the N side of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  UCD163208  Lomatium macrocarpum Craig D. Thomsen 2000-4-28 2206 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD163700  Lomatium macrocarpum Craig Thomsen 1999-5-10 2009 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  JEPS80091  Lomatium macrocarpum L. R. Heckard with J. Hickman 1979-6-16 5099 Colusa n. of meadow just w. of West Peak Snow Mt. 1965 Comment
  UCD127699  Lomatium macrocarpum Grady L. Webster 1977-5-15 7681 Colusa Along Bear Creek, ca. 2 mile west of Route 20 along Wilbur Springs Road. 365 Comment
  CDA33696  Lomatium marginatum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  JEPS16220  Lomatium marginatum var. purpureum Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3172 Colusa 7.7 mi. w. Sites (Grapevine Grade to Lodoga) Comment
  SEINET13944634 Image available Lomatium tomentosum Jack Major, Eilif Dahl 1962-1 sn Colusa Bear Valley Comment
  JEPS17551  Lomatium utriculatum W. L. Jepson 1920-5-23 8968 Colusa near Leesville (Bear Valley, w. Colusa Co.); w. Colusa Co., Bear Valley Comment
  UC1053478  Lomatium utriculatum Rimo Bacigalupi and Arthur Holmgren 1950-4-25 3177 Colusa 10 mi. n.w. Sites (Grapevine Grade to Lodoga) Comment
  UCD64263  Lomatium utriculatum Craig D. Thomsen 2000-3-31 2060 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
  UCR261619  Lomatium utriculatum Ann Howald 2003-3-25 2287 Colusa Inner North Coast Ranges, Sites-Lodoga Road, c. 1.5 miles east of Grapevine Pass, east of Clark Ridge 319 Comment
  SEINET13944681 Image available Lomatium utriculatum F. G. Meyer 1938-1 1361 Colusa low meadows, about 50 miles west of Williams Comment
  UCD40907  Lomatium utriculatum Nelson Cronyn 1984-4-22 4 Colusa 3.2 mi. north of Hwy 20 on Bear Valley Road. About 300 yards from road. 381 Comment
  UCD57666  Lonicera interrupta Erica A. Smith; with Plant Biology 102 2007-4-29 4 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, 100 yards west of where road crosses Craig Creek. 313 Comment
  UCD63113  Lonicera interrupta Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4944 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 384 Comment
  UCD66539  Lonicera interrupta Craig D. Thomsen 2001-5-24 2516 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  UCR227340  Lotus denticulatus Craig D. Thomsen 2000-6-23 2385 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, south side of Hwy 20, c. 0.5 mi west of Hwy 20/16 intersection (between mileposts 2.17 and 2.63) 325 Comment
  JEPS83028  Lotus grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2236 Colusa about 5 mi w Stonyford (along Trough Spring Ridge road 0.5 mi sw of its junction with the Stonyford-Fouts Spring road); Trough Spring Ridge 731 Comment
  HSC48166  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3930 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  HSC72211  Lotus humistratus Thomas W. Nelson, Jane P. Nelson 1980-6-24 5879 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  UC726262  Lotus humistratus A. A. Heller 1940-6-7 15714 Colusa e of Lodogo (on the Lodogo-Sites road, near the foot of the grade) Comment
  RSA138209  Lotus micranthus Volney Rattan 1884 Colusa Fonts Spring Comment
  UC454099  Lotus purshianus var. purshianus H. P. Chandler 1905-10-14 Colusa Princeton 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
  HSC40211  Lupinus albifrons J. P. Smith, Thomas W. Nelson 1976-4-14 8580 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UCD41127  Lupinus albifrons K. Arhangelsky 2002-3-28 146 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  UCD82547  Lupinus albifrons Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5702 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  CAS-BOT-BC198400  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 3832 Colusa W. of Williams Comment
  CAS-BOT-BC198401  Lupinus albifrons var. albifrons Mrs. H. C. Cantelow 1940-3-10 s.n. Colusa 11 miles west of Williams Comment
  CAS-BOT-BC198402  Lupinus albifrons var. albifrons Roxana S. Ferris 1926-4-23 6422 Colusa Summit of grade Williams-Stonyford Road Comment
  RSA799177  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17121 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 77 Comment
  UCD83747  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 a Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  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
  UCD64250  Lupinus bicolor Craig D. Thomsen 2000-3-31 2052 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
  SEINET10838151  Lupinus bicolor subsp. tridentatus Smith 1978-4-2 Smith 9570 Colusa Colusa co. T14n, r5w, sec. 34. Bear valley rd., 2.1 Miles from its junction With state route 20. Rock faces in metasedimentary chaparral. 366 Comment
  RSA10439  Lupinus densiflorus var. aureus Carl B. Wolf 1928-5-8 2129 Colusa Sacramento Valley. 2 miles north of Dunnigans. Comment
  RSA424726  Lupinus densiflorus var. palustris Aaron Liston, M. Blumler 1987-4-26 668 -1 Colusa East Park Reservoir, 3.2 miles E of Stonyford Comment
  CAS-BOT-BC8485  Lupinus formosus var. robustus Amos Arthur Heller; H. E. Brown 1902-5-20 5573 Colusa Near College City Comment
  NY15886  Lupinus formosus var. robustus A. A. Heller 1902-5-20 5573 Colusa Near College City 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
  JEPS86629  Lupinus latifolius var. latifolius L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6696 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa lake Co.-Line); sw flank Snow Mountain 1500 Comment
  UCR228655  Lupinus latifolius var. latifolius Ellen Dean, Davis Botanical Society 2008-5-31 5001 Colusa West of Hwy I-5 at Maxwell, east slope of Goat Mountain along Goat Mountain Road 1100 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
  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
  SBBG122950  Lupinus luteolus B. Ertter 1989-7-1 8616 Colusa rd to Goat Mtn lookout, 0.4 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1371 Comment
  RSA716572  Lupinus microcarpus D. Isle 1995-4-27 403 Colusa East Park Reservoir Rd. at N edge just at rt. angle turn, w. of cattle guard 1/4 mi. 348 Comment
  CHSC71113  Lupinus microcarpus var. densiflorus Jan Monelo 1989-4-1 7 Colusa In hillside spanning Hwy 20. Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC90508  Lupinus microcarpus var. densiflorus Martin Polsan 1988-4-9 14 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  CHSC91566  Lupinus microcarpus var. densiflorus D. Isle 1995-4-28 402 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Lodoga Rd. just N of Leesville Rd. jct., 1/8 mi., at road edge. 304 Comment
  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
  UCD57462  Lupinus microcarpus var. densiflorus Ellen Dean; W. Murray, J. Alderson, B. Weiss, M. Starbuck 2007-4-7 3642 Colusa Payne Ranch (owned by BLM), lands just west of Hwy 16, about 2 road miles south of junction of Hwy 20 and Hwy 16. Mouth of Craig Canyon, along unimproved road. 316 Comment
  JEPS108050  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Road, 4.4 mi N Leesville. 457 Comment
  OBI56805  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  RSA659209  Lupinus microcarpus var. densiflorus R. Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd., 4.4 mi N Leesville. 457 Comment
  UC614851  Lupinus microcarpus var. densiflorus Beryl O. Schreiber 1932-4-3 223 Colusa road to Williams; road to Williams Comment
  RSA724143  Lupinus nanus subsp. nanus Richard R. Halse 2002-3-21 6129 Colusa Willaism; by junction of 5th Street and B Street. 24 Comment
  HSC86906  Lupinus subvexus var. subvexus Terry Hines, Ellen Purcell, N. Williams 1988-4-17 58 Colusa 1.3 mi. S on Bear Valley Rd. from corner of Brim Rd. 396 Comment
  SEINET7096535 Image available Lupinus succulentus Richard R. Halse 2001-3-22 5947 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  UCD56925  Lupinus succulentus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3528 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  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
  HSC89685  Lupinus succulentus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 28 Colusa Bear Valley Rd. and Hwy. 20 intersection 305 Comment
  HSC48193  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3963 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD66529  Lycium barbarum Craig D. Thomsen 2000-4-28 2230 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on north side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 2.80. Just west of massive valley oak along Bear Creek, near base of Hwy 20 fill slope. 300 Comment
  RSA127531  Lycopus americanus Milo S. Baker 1946-9-4 11603 Colusa Butte Sink, West Gridley Road, in a wet spot. Comment
  CHSC61752  Lythrum californicum Vernon H. Oswald 1993-9-1 5890 Colusa Sacramento Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N side of Hunters Creek in Tract 44, near the S boundary of the refuge. Growing along tules in a ditch along the levee road bordering the N side of Tract 44, S of Cell 1, Pool 12. 22 Comment
  RSA0014831  Lythrum californicum Roxana Stinchfield 1916-7-11 433 Colusa Davis Tule, near Sycamore Slough. Comment
  UCD102993  Lythrum californicum Herbert L. Mason; Verne Grant 1946-8-7 12977 Colusa Butte Sink. 8 miles N of Colusa. Comment
  CHSC86827  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC94454  Lythrum hyssopifolia Lowell Ahart 2006-8-9 13161 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  NY365796  Lythrum salicaria L. Ahart 1980-6-11 2371 Colusa 9½ miles north of Colusa. Valley Grassland. 35 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
  CHSC115003  Lythrum tribracteatum Lowell Ahart 2015-4-28 20113 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC84956  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  UCD102948  Lythrum tribracteatum H. L. Mason 1945-7-11 12645 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. Comment
  UCD67079  Lythrum tribracteatum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5103 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  JEPS117019  Lythrum tribracteatum David Gowen 2008-5-24 925 Colusa West of Sites on north side of road. Comment
  UC638653  Madia citriodora Ethel Crum 1938-5-8 2031 Colusa 3 mi n Leesville 426 Comment
  CAS-BOT-BC342678  Madia elegans Roxana Stinchfield 1916-7-11 429 Colusa Sycamore Slough Road Comment
  CHSC94407  Madia elegans subsp. densifolia Lowell Ahart 2006-8-22 13229 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS108735  Madia elegans subsp. densifolia Lowell Ahart 2006-8-9 13095 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  CHSC79466  Madia exigua B. Castro; L. P. Janeway 2000-5-2 1106 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 216 Comment
  CHSC88539  Madia exigua B. Castro 2003-5-15 1439 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On steep E-facing slope above dirt rd paralleling a S-trending canyon. 176 Comment
  CHSC94677  Madia exigua Lowell Ahart 2006-6-11 12665 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS108730  Madia exigua Lowell Ahart 2006-6-11 12665 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS119422  Madia exigua G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14741 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 Comment
  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
  CHSC101645  Madia gracilis David W. Isle 2003-5-15 1630 Colusa Mendocino National Forest; about 6 mi. W of Stonyford; N aspect serpentine chaparral slope S of (M-10) (18N01.2) and just W of OHV Trail 30 (18N78) jct. On August 8, 2001 Trough Fire Burn Site. MDB and M. 585 Comment
  RSA141307  Madia minima J. M. Tucker 1959-5-30 3520 Colusa Ca. 2 miles (by road) below the summit of Goat Mountain (ca. 1.25 miles, airline, north-northwest of Goat Mountain Lookout) 1646 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
  CHSC115622  Malacothamnus fremontii David Isle; Frank Elliott 2014-6-11 2134 Colusa Northern Sacramento Foothills: Frand and Judy Elliott Ranch, 1 mile S of Rail Canyon Rd. Jct. with Ssites-Lodoga Rd. and 1/2 mile S of Sites-Lodoga Rd. SE of Elliott home. (GPSs for Rail Canyon Rd. Jct./Sites-Lodoga Rd.) 10S-0546594E, 4356133N). Comment
  RSA0119054  Malacothamnus fremontii David Isle, Frank Elliott 2014-6-11 2134 Colusa Northern Sacramento Foothills: Frank and Judy Elliott Ranch, ~1 mile S of Rail Canyon Rd. Jct. with Sites-Lodoga Rd. and ~1/2 mile S of Sites-Lodoga Rd. SE of Elliott home. (GPS for Rail Canyon Rd. Jct/ Sites-Lodoga Rd.) Comment
  CHSC27632  Malacothrix floccifera Timothy Spira; Robert Schlising 1978-5-13 3237 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC8145  Malacothrix floccifera J. G. Moore 1969-4-12 93 Colusa Hwy 20, 0.5 mi. w of junction with Hwy. 16. 228 Comment
  UCD66682  Malacothrix floccifera Craig D. Thomsen 2000-5-11 2309 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
  RSA135416  Malacothrix floccifera Volney Rattan 1884-1 s.n. Colusa [no location specified] Comment
  SEINET7096534  Malva parviflora Richard R. Halse 2001-3-22 5945 Colusa Williams; along a vacant lot by 455 - 4th street Weedy roadside; 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  CHSC107935  Malvella leprosa B. Castro; Amy Lyons 2011-8-3 1902 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 0.7 mi southeast of Funks Reservoir and 350 ft northeast of Tehama-Colusa Canal. In grassland in patch under transmission lines ca 0.3 mi northwest of large +- alkaline marsh. 52 Comment
  CHSC117119  Malvella leprosa B. Castro; Tom Boullion 2009-8-19 1800 F Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, near Moon Bend on W bank of the Sacramento River at RM 141.4, just off Moon Bend Rd. Near main levee road. 18 Comment
  CHSC96927  Malvella leprosa Lowell Ahart 2007-7-7 14261 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  UCR205148  Malvella leprosa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14254 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SEINET4208912  Marah watsonii Richard R. Halse 2013-3-26 8744 Colusa Along the Leesville-Logoda, or 3.2 miles north of the junction of Leesville and Bear Valley Roads; Indian Valley.; 0 426 Comment
  UC102130  Marah watsonii T. S. Brandegee April 1889 Colusa Epperson's Comment
  UCD57553  Marrubium vulgare Andrew Pedersen; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, near confluence with Craig Creek. 304 Comment
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  CHSC84939  Marsilea vestita subsp. vestita Lowell Ahart 2003-10-23 10669 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UCD67083  Marsilea vestita subsp. vestita Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5105 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  UCR225262  Marsilea vestita subsp. vestita Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5105 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
  CAS-BOT-BC348045  Matricaria discoidea Roxana S. Ferris 1917-4-19 693 Colusa Sycamore Slough Comment
  UCD58123  Matricaria discoidea Ellen Dean; PLB 102 Class 2007-4-29 3719 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. Near 'Roadkill Cafe. 414 Comment
  CHSC94450  Medicago lupulina Lowell Ahart 2006-8-9 13123 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC1051742  Medicago lupulina Helen K. Sharsmith 1953-6-20 4298 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest (slopes) 762 Comment
  UCR212379  Medicago minima Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4683 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, just north of Eula Canyon. 313 Comment
  UC1952500  Medicago polymorpha Richard R. Halse 2007-3-22 7103 Colusa Williams, by junction of 5th Street and B Street 25 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
  UCR205147  Medicago sativa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14253 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCD107927  Medicago sativa Beecher Crampton 1963-8-5 6874 Colusa 3.5 miles south of Grimes. Comment
  CHSC79529  Melia azedarach B. Castro; L. P. Janeway 2000-5-1 1101 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 205 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
  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
  UCD37178  Melica californica Beecher Crampton 1958-4-21 4730 Colusa 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. Comment
  UCD57285  Melica californica Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3656 Colusa BLM Payne Ranch. Craig Canyon. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Along unimproved road. 322 Comment
  UCD87699  Melica californica Beecher Crampton 1958-5-19 4817 Colusa West of Lodoga. Comment
  UCR119121  Melica californica Beecher Crampton 1958-4-21 4730 Colusa Inner North Coast Ranges, 7.8 miles northwest of Rumsey, along Highway 16, just above junction of Bear Creek with Cache Creek. 381 Comment
  CHSC112269  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD63920  Melica torreyana Craig D. Thomsen 2001-5-24 2510 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
  UCD88843  Melica torreyana Beecher Crampton 1958-5-19 4816 Colusa West of Lodoga. Comment
  UCD72476  Melilotus albus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3810 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
  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
  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
  POM62477  Mentha canadensis Roxana Stinchfield 1918-7-8 382 Colusa Sycamore Slough; Stinchfield Ranch 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
  UC2042873  Mentzelia dispersa Barbara Ertter 1989-7-1 8598 Colusa Road to Goat Mt. Lookout 2.2 mi S of Route M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 air miles WSW of Stonyford. Comment
  UC71777  Mentzelia laevicaulis var. laevicaulis H. P. Chandler 1905-10-17 Colusa Princeton Comment
  UCD162998  Micropus californicus Craig D. Thomsen 2000-4-28 2183 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD56904  Micropus californicus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3507 Colusa BLM Payne Ranch. Entrance to Craig Canyon on west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  SEINET5710220  Micropus californicus Patricia Warne 1967-1 56 Colusa South end of Bear Valley by Bear Creek.; Bear Valley 390 Comment
  CAS-BOT-BC348363  Micropus californicus var. californicus Roxana S. Ferris 1926-4-23 6431 Colusa Near summit of grade on Williams - Stonyford Rd 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
  HSC65998  Micropus californicus var. californicus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-20 44 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville. Comment
  HSC44282  Microseris douglasii Barbara Kelly 1977-4-24 353 Colusa Along Walker Ridge Rd. above Barrel Springs Campground. 701 Comment
  CAS-BOT-BC348829  Microseris douglasii subsp. douglasii Lewis S. Rose 1936-4-27 36185 A Colusa 15 mi. NW. of Rumsey 304 Comment
  RSA275337  Microseris douglasii subsp. douglasii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3927 Colusa Growing along Bear Valley Road ca. 2 miles from junction with State Route 20. 366 Comment
  UCD57108  Microseris douglasii subsp. douglasii Gordon Harrington; Diana Hickson 2007-4-7 0021 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
  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
  CHSC81221  Microseris sylvatica L. P. Janeway; B. Castro, Shirley Innecken 2001-5-9 7036 Colusa Vicinity of Grapevine Creek, Hayes Creek, and Andys Canyon. 377 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
  CHSC94312  Mimetanthe pilosa Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  UC726146  Mimulus bolanderi A. A. Heller 1940-6-7 15720 Colusa e Lodogo (below the road on the Sites-Lodogo road near the end of the grade) Comment
  UCD122620  Mimulus douglasii Kim E. Steiner 1978-3-30 175 Colusa Bartlett Springs Road, ca. 15.9 miles from State Highway 20 via Bear Valley Road. Comment
  JEPS80762  Mimulus floribundus L. R. Heckard and J. C. Hickman 1981-7-30 5729 Colusa crossing Trout Creek (se side of mt.); Snow Mt. 1828 Comment
  HSC85824  Mimulus guttatus David Munger, Tallchief Comet, Jeff Dunk 1987-4-12 78 Colusa Bear Valley Comment
  JEPS80223  Mimulus guttatus L. R. Heckard and J. Hickman 1980-7-3 5380 Colusa sw slope Snow Mt. (below pipe outlet from spring); Summit Springs 1554 Comment
  UCD57657  Mimulus guttatus Madeline Christopher; 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. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road in Craig Creek. 323 Comment
  RSA34075  Mimulus guttatus A. A. Heller 1940-5-14 15619 Colusa 4 miles north of Maxwell. 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
  JEPS10504  Mimulus microphyllus W. L. Jepson 1932-5-7 16259 Colusa valley 1 mi above Venado 274 Comment
Read comments
Jun 15 2007
  UCD15288  Mimulus microphyllus Claire Warshaw 1985-4-13 6 Colusa along Bear Valley Road, 8 miles norhtwest from intersection with highway 20. 390 Comment
  UCD40884  Mimulus nasutus Richard Schulhof 1984-4-21 8 Colusa Approximately 8 miles north of Hwy 20 on Bear Valley Road. 381 Comment
  JEPS7899  Mimulus nudatus Milo S. Baker 1953-5-11 12651 Colusa near Lake-Colusa Line (Hiway 20) Comment
  UC1010390  Mimulus nudatus Milo S. Baker 1953-5-11 12651 Colusa near Lake-Colusa Line (Hiwy 20) Comment
  UC1334723  Mimulus nudatus Eugene Memmler 1969-5-8 101 Colusa ca. 1 mi e Lake County line (along State Hwy 20 from Williams); Bear Creek 457 Comment
  UC886310  Mimulus nudatus Alice Eastwood, John Thomas Howell 1938-5-16 5636 Colusa on road to Williams (Lake-Colusa county line) Comment
  JEPS108907  Mimulus pilosus Lowell Ahart 2006-8-9 13105 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 422 Comment
  JEPS108933  Mimulus pilosus Lowell Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UC71770  Mimulus pilosus H. P. Chandler 1905-9-14 Colusa Princeton Comment
  RSA794844  Mimulus pilosus D. Isle, Rhonda Isle 2010-7-21 1915 Colusa West shoreline of East Park Reservoir on bank just north of spillway; within 2 to 4 feet of water line. 365 Comment
  JEPS2941  Mimulus rattanii Volney Rattan Colusa trail above Fout's Spr. (n of San Francisco Bay); Coast Mts.; trail above Fout's Spring (?), Colusa Co. 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
  UC630429  Minuartia douglasii Annetta Carter 1938-5-7 1377 Colusa 4 mi n Rumsey; Inner North Coast Range, Comanche Hills 259 Comment
  UCD57104  Minuartia douglasii Gordon Harrington; Diana Hickson 2007-4-7 0025 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, ca .5 mi. W of Roadkill Cafe, N. of Thompson Creek. 439 Comment
  UCD82364  Minuartia douglasii Robin McMaster 1973-4-15 334 Colusa middle of Bear Valley. Comment
  CHSC92630  Minuartia nuttallii var. gregaria D. Isle 1999-7-14 1287 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Approx. 1/3 mile below jct. 16N18/16N03 (1/4 mi. below Lake/Colusa Co. Line in Colusa Co. GPS: 10S 0522970 E 4347039 N; Spr 25' South. 1688 Comment
  UC903048  Mirabilis greenei Ethel Crum 1932-5-8 1454 Colusa Stonyford North Coast Ranges (southern extension of ranges) 426 Comment
  UC637082  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa 4 mi n of willows (Sacramento Valley); Sacramento Valley Comment
  JEPS81404  Monardella odoratissima subsp. glauca L. R. Heckard and J. C. Hickman 1982-7-9 6017 Colusa near junction Horse Glade (along road to Lookout, Colusa-Lake County boundary); Goat Mt. 1737 Comment
  UCD70238  Monardella sheltonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley, Bear Valley Road. Bear Valley Creek. 350 Comment
  CHSC83196  Monardella villosa D. Sanchez-Mata 1996-6-27 Colusa Williams. Blue Ridge. In Bear Creek. Comment
  SEINET9336472  Monardella villosa Mark Elvin, Isle, David; Brunell, Mark 2006-8-3 4991 Colusa Southern Northern Inner Coast Ranges Comment
  SEINET10582138  Monardella villosa A. Graff 1993-7-25 Graff 367 Colusa Bear Valley Rd., 2.2 miles north of Rte. 20, on right road cut. Locally infrequent on sandstone cliff, beneath Pinus coulteri, Quercus agrifolia, Arctostaphylos, sp. Past bloom. Comment
  HSC96822  Monardella villosa subsp. villosa L. Ahart 2006-6-11 12672 Colusa E side of an off road trail (Trail 30), about 100 yards S of Fouts Rd., about 5 mi. W of Stonyford 613 Comment
  UCD82537  Monardella villosa subsp. villosa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5690 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  JEPS35229  Monolopia major W. L. Jepson 1932-5-7 16254 Colusa valley above Venado 274 Comment
  UCD163879  Monolopia major Craig D. Thomsen 2002-3-27 2574 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  POM256988  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 427 Comment
  UCD134573  Monolopia major John M. Tucker 1968-5-4 4109 Colusa Bear Valley, 10 miles (by road) northwest of junction of Bear Valley Road and State Highway 20. 396 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
  UCD86698  Muhlenbergia filiformis G. Thomas Robbins; L. R. Heckard 1956-7-25 3707 Colusa South of Snow Mt. East and skirting the eastern base of the ridge forming Snow Mt. West. 1981 Comment
  CAS-BOT-BC83270  Myosurus minimus Roxana S. Ferris 1917-4-10 1441 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83282  Myosurus minimus James Jokerst 1986-5-6 2299 Colusa Near Lurline Creek. 41 Comment
  CAS-BOT-BC83283  Myosurus minimus James Jokerst 1986-5-6 2300 Colusa Near Lurline Creek. 41 Comment
  UC1028302  Myosurus sessilis George B. Rossbach 1955-4-9 271 Colusa 3 mi e Maxwell (Sacramento Valley); Sacramento Valley 18 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
  CAS-BOT-BC456163  Najas guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa Two miles west of Colusa on Williams highway by bridge Comment
  SEINET3237610  Najas guadalupensis subsp. guadalupensis Herbert L. Mason, Verne Grant 1946-9-5 13120 Colusa Road to Lake County, 1.6 miles west of Williams. Comment
  POM163454  Nassella cernua Roxana S. Ferris 1926-4-23 6399 Colusa On rocky outcrop near Mountain House on Williams-Stonyford Road Comment
  UCD72481  Nassella lepida Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3815 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, along trail that beings approximately across from BLM parking lot, located at south end of bridge. 256 Comment
  CHSC80123  Nassella pulchra L. P. Janeway; B. Castro 2000-4-10 6661 Colusa Vicinity of Lurline Creek and Sulphur Gap. 124 Comment
  UCD87672  Nassella pulchra D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  UCD66983  Navarretia atractyloides Ellen Dean; Davis Botanical Society 2008-5-31 5057 Colusa west of I-5 at Maxwell, vicinity of Fouts Springs, west of Stoneyford, Grindstone Ranger District Mill Creek campground parking area on S side of Fouts Springs Road. 507 Comment
  CAS-BOT-BC230252  Navarretia cotulifolia A. A. Heller 1916-6-9 12388 Colusa Coast Range about 2 miles W of Leesville Comment
  CHSC76765  Navarretia eriocephala J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 121 Comment
  CHSC76766  Navarretia heterandra J. Marr; H. West 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 114 Comment
  JEPS117020  Navarretia heterandra David Gowen 2008-5-24 924 Colusa West of Sites, heading up the hill on road to Ladoga, opposite driveway to #4826. Comment
  CHSC88556  Navarretia jepsonii L. P. Janeway 2001-6-6 7127 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  JEPS108184  Navarretia jepsonii David Gowen 2005-6-22 446 Colusa Goat Mtn. Rd. (dirt road), ca. 1 mile E. of Ladoga Stonyford Rd., just inside the Mendocino Nat'l Forest boundary. Comment
  SEINET197559  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Mendocino National Forest; Black Diamond Ridge. 610 Comment
  UC1552812  Navarretia jepsonii Frederica Bowcutt 1985-6-20 607 Colusa n of Hwy. 20; Walker Ridge Comment
  UC908635  Navarretia jepsonii Herbert L. Mason 1946-5-31 12810 a Colusa near summit of Leesville Grade (drainage of n fork of Cache Creek); Cache Creek 548 Comment
  UCD66870  Navarretia jepsonii Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5073 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. Just south of junction with trail that heads east to the headwaters of Thompson Creek. 634 Comment
  UCR261670  Navarretia jepsonii Ann Howald 2003-5-29 2346 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  UCR261754  Navarretia jepsonii Ann Howald 2003-5-31 2360 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, ridge west of Serenity camping area 373 Comment
  CAS-BOT-BC230318  Navarretia jepsonii A. A. Heller 1940-6-7 15709 Colusa 7 miles N of Stonyford Comment
  CAS-BOT-BC230339  Navarretia leucocephala subsp. bakeri Niall McCarten 1985-5-6 5111 Colusa S side of Standard road, 0.2 mile W of Mills Orchards Road NW of Williams Comment
  UCR225393  Navarretia nigelliformis Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5082 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Northwestern part of ranch, along trail that follows the border of Lake and Colusa counties. South of junction with trail that heads down to the headwaters of Thompson Creek 429 Comment
  CDA40123  Navarretia nigelliformis D. Brown 1986-6-3 s.n. Colusa County road southwest of Williams. 0 Comment
  CHSC79545  Navarretia nigelliformis subsp. nigelliformis B. Castro; L. P. Janeway 2000-5-1 1103 Colusa Vicinity of Sites, hills S of the Sites-Lodoga Rd, and Grapevine Creek. 204 Comment
  CHSC89835  Navarretia nigelliformis subsp. nigelliformis B. Castro; L. Janeway 2001-5-10 1250 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek. 381 Comment
  JEPS95775  Navarretia nigelliformis subsp. nigelliformis J. Greenhouse with J. C. Game 1999-5-30 Colusa on W side of Bear Valley Rd. about 6 1/2 mi from CA Rte. 20 Bear Valley 390 Comment
  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
  CHSC1298  Navarretia pubescens V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  UC584174  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 mi w Williams (on Bartlett Springs road) Comment
  CHSC107485  Navarretia sinistra subsp. pinnatisecta David Isle; John Whittlesey 2009-7-11 1917 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. Snow Mtn. Wilderness; Summit Springs Trail; Near Jeffrey Pine stand and 1987 Fouts Fire JP Snag. [Trail straddles Lake and Colusa County lines] 1645 Comment
  UCR261750  Navarretia tagetina Ann Howald 2003-5-29 2349 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.6 miles north of Lodoga, 0.1 mi south of Chisolm Cove Group Campground 385 Comment
  JEPS15538  Nemacladus capillaris G. Thomas Robbins with L. R. Heckard 1956-7-25 3696 Colusa about 1.5 air mi se Snow Mt. summit (on ridge above Fouts Camp and along trail to Snow Mt, on Lake-Colusa county boundary); Snow Mt. 1920 Comment
  UC1585893  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt. Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); Stony Creek 1500 Comment
  JEPS80750  Nemacladus capillaris L. R. Heckard and J. C. Hickman 1981-7-29 5713 Colusa n of Summit Springs (n of road, s side of Snow Mt, Colusa-Lake county boundary); Snow Mt. 1539 Comment
  CHSC76510  Nemacladus montanus Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  CHSC79485  Nemacladus montanus B. Castro; L. P. Janeway 2000-5-4 1138 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD63119  Nemacladus montanus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4949 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 405 Comment
  JEPS95489  Nemophila heterophylla Vernon H. Oswald and L. Ahart 1994-4-6 6058 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  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
  UC595049  Nemophila heterophylla Annetta Carter 1938-5-8 1384 Colusa 6.6 mi s Lodoga; s of Lodoga Comment
  UC598446  Nemophila heterophylla Milo S. Baker April, 1938 Colusa Williams Highway near Lake County Line; near Lake County Line Comment
  UC606895  Nemophila heterophylla L. Constance 1938-4-22 2146 Colusa Lower Lake-Williams Rd 4 mi e Lake-Colusa LIne (on Cache Creek near Wilbur Springs); Inner North Coast Ranges, Cache Creek nr Wilbur Springs 365 Comment
  UC72014  Nemophila heterophylla Miss M. Alice King 1905-1 Colusa near College City (Sacramento Valley); , near College City Comment
  CHSC110841  Nemophila heterophylla David Isle 1989-4-14 2010 Colusa Stony Creek Watershed. Charlotte Roush Ranch, S of Cook Springs Road. Comment
  CHSC14017  Nemophila menziesii G. Notch 1974-3-30 122 Colusa Locally scattered along roadside ca. 0.5 mi w of jct of Hwys 20 and 16 on Hwy 20. 335 Comment
  JEPS1484  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
  UC38962 Image available Neostapfia colusana J. Burtt Davy 1898-5-26 Colusa near Princeton; ; Princeton, Colusa Co. Comment
  CHSC112643  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
  CAS-BOT-BC231533  Nicotiana glauca Roxana S. Ferris 1926-4-23 6400 Colusa Williams - Stonyford Road near Mountain House Comment
  CHSC43374  Nicotiana glauca Lowell Ahart 1976-2-14 1006 Colusa Along a small stream, about 2 miles west of Sites. 182 Comment
  UC199530  Nicotiana quadrivalvis H. M. Hall 1917-4-29 10286 Colusa 5 mi n Colusa (Sacramento River banks); Sacramento River 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
  JEPS75712  Orobanche californica subsp. jepsonii L. R. Heckard 1974-9-9 Colusa Trail up from Summit Springs, Snow Mt. Comment
  CAS-BOT-BC502598  Orobanche californica subsp. jepsonii Roxana Stinchfield 1916-7-11 451 Colusa Colusa--Williams Road at trough Comment
  UCD123224  Orobanche uniflora Betty Hess 1973-4-15 s.n. Colusa 0.5 mile north of State Highway 20 on Bartlett Springs Road. 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
  CHSC72422  Osmorhiza chilensis L. P. Janeway; David Isle 1998-7-3 5710 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  CHSC88558  Packera clevelandii L. P. Janeway 2001-6-6 7117 Colusa Inner North Coast Ranges. Malaney Flat, about 4.8 km (air) east of Walker Ridge Road. Large open meadow. 610 Comment
  UCD163342  Packera clevelandii Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  UCD134779  Packera eurycephala John M. Tucker 1968-5-4 4108 Colusa Bear Valley, 8.6 miles (by Bear Valley Road) northwest of junction with State Highway 20. 396 Comment
  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
  UCD66559  Packera greenei Craig D. Thomsen 2001-5-24 2438 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
  UCD89771  Panicum capillare subsp. hillmanii Beecher Crampton 1965-7-8 7446 Colusa 1 mile south of Sycamore. Comment
  UCD89786  Panicum capillare subsp. hillmanii Beecher Crampton 1969-6-18 8457 Colusa 1.5 miles south of Williams. Interstate Hwy. 5 northbound. Comment
  UCD88625  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa 4 miles south of Maxwell, along U.S. Highway 99W. Comment
  CAS-BOT-BC413468  Parietaria pensylvanica Roxana Stinchfield 1916-7-8 378 Colusa Sycamore Slough. Stinchfield ranch Comment
  CDA11258  Parnassia californica G. F. Hrusa 1994-11-7 11993 Colusa North Coast Biodiversity Arena; Banks of Little Stony Creek, approx. 2.5 miles above Stonyford-Lodoga Rd. on Goat Mtn. Rd. Comment
  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
  RSA654746  Parnassia palustris var. californica G. Fred Hrusa 1994-11-7 11992 Colusa Frenzel Creek Research Natural Area. USFS. Little stony Creek at mouth of Frenzel Creek, approx. 2 miles above Stonyford-Lodoga Road. On Goat Mountain Road. 440 Comment
  UC1613494  Parvisedum pumilum Charles M. Belshaw 1937-4-25 2851 Colusa vicinity of Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge Comment
  UCD88914  Paspalum distichum K. Esau; D. Hartmann 1941-7-17 s.n. Colusa near Williams. Comment
  CHSC77918  Pectocarya pusilla Jean Witzman; Beth Hendrickson 1999-4-7 Colusa Vicinity of Antelope Valley, Funks Creek, and Logan Ridge. 121 Comment
  UC1177895  Pectocarya pusilla Peter M. Ray 1950-4-16 1738 Colusa 2 mi s Lodoga (on rd to Leesville) 381 Comment
  SEINET13753666  Pedicularis densiflora R. R. Halse 2014-3-25 9035 Colusa Along the Bear Valley Road ca. 1.8 miles WNW of its junction with State Hwy 20. 378 Comment
  UCD165931  Pedicularis densiflora Ellen Dean; with Tom Starbuck 2016-4-24 8842 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 398 Comment
  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
  JEPS86608  Pellaea L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6711 Colusa 0.5 mi ne Summit Springs; sw flank Snow Mt 1650 Comment
  CHSC77906  Pellaea andromedifolia Beth Hendrickson; Jean Witzman, Mary Ann Griggs 1999-3-16 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 158 Comment
  SEINET3873302  Pellaea mucronata subsp. mucronata Stephen Plant 1978-4-22 212 Colusa Wilber Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  UCD57661  Penstemon heterophyllus Madeline Christopher; 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. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. 335 Comment
  JEPS104395  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the e side of Bear Valley Rd, ca 3 mi nw of Highway 20. 381 Comment
  NY601769  Penstemon heterophyllus var. purdyi L. Constance 1938-4-22 2148 Colusa Above Salt Creek, Lower Lake-Williams road, 11 miles northeast of Lake-Colusa line, Inner North Coast Ranges. 152.4 Comment
  UCD82488  Penstemon heterophyllus var. purdyi Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5674 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 853 Comment
  NY601740  Penstemon heterophyllus var. purdyi C. C. Freeman 1983-5-22 1891 Colusa CA 20, 2.2 miles north-northeast of the junction of CA 20 & 16 in the foothills of the Sierra Cascades. Comment
  UCD124200  Penstemon purpusii G. Ledyard Stebbins Jr. 1964-7-4 6174 Colusa East of summit, Mt. St. John, west of Stonyford. 1828 Comment
  CHSC42649  Perideridia howellii Vernon Oswald 1986-6-30 2180 Colusa Mill Valley Campground near Letts Lake and Lily Pond. 1188 Comment
  CHSC42651  Perideridia kelloggii Vernon Oswald 1986-6-30 2175 Colusa Letts Lake Rd. (17N02) 0.6 mi se of M10. 1219 Comment
  UC1389985  Perideridia kelloggii Freed W. Hoffman 1947-6-19 1659 Colusa Cooks Springs North Coast Ranges (w Colusa Co.) Comment
  UCD61454  Perideridia kelloggii Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3900 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
  JEPS127597  Perideridia kelloggii David Isle with Frank Pendell 2014-6-16 2135 Colusa About 2 miles W of Stonyford on the Pendell Ranch. SE of the home of Frank and Sheri Pendell about 1/4 mile and NW of the Stonyford cemetery about 200 yards. Comment
  CHSC107483  Persicaria amphibia Jeanne Pendell 2010-7-17 1918 Colusa Mendocino National Forest - North Coast Ranges Middle Fork Stony Creek Watershed. East arm of East Park Reservoir, in the lake. 365 Comment
  CHSC94442  Persicaria maculosa Lowell Ahart 2006-8-9 13132 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UC71625  Phacelia ciliata var. ciliata Miss Alice King 1905-1 Colusa College City Comment
  CDA16098  Phacelia corymbosa G. F. Hrusa 1999-5-16 15045 Colusa North Coast Ranges; Above Fouts Springs. 594 Comment
  CHSC32769  Phacelia corymbosa James Jokerst 1980-6-27 923 Colusa Near Frenzel Creek Botanical Area. 609 Comment
  UC1299143  Phacelia corymbosa Freed W. Hoffman 1947-6-19 1615 Colusa Cook Springs Cook Springs (w Colusa Co.) Comment
  CHSC62845  Phacelia distans Vernon H. Oswald; Lowell Ahart 1994-3-23 6021 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Locally common in gravelly serpentine soil on the bank between the road and Little Stony Creek. 505 Comment
  HSC35373  Phacelia distans Robert M. Specht 1975-5-4 169 Colusa 1/2 mi. NE of Fouts Springs along Stoney Creek 488 Comment
  UC901823  Phacelia egena L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3320 Colusa road cut 1 mi se Sites; Stone Corral Creek 76 Comment
  SD58509  Phacelia egena L. R. Heckard, C. R. Bell 1951-6-14 176 Colusa West facing serpentine slope near Stonyford. Comment
  UC1051762  Phacelia egena L. R. Heckard 1953-4-12 S- 136 Colusa University of California Botanical Garden Comment
  HSC45747  Phacelia heterophylla Stephen Plant 1978-4-22 205 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC1609379  Phacelia imbricata Vernon H. Oswald and Lowell Ahart 1993-5-27 5430 Colusa Sites-Lodoga Rd ca 0.4 mi w Grapevine Pass (4.6 road mi e of Lodoga) 481 Comment
  UC726917  Phacelia imbricata A. A. Heller 1942-5-29 16483 Colusa bank on State Hwy 20 3 mi w junction with State Highway #16 Comment
  CHSC79517  Phacelia imbricata subsp. imbricata B. Castro; L. P. Janeway 2000-5-2 1109 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 Comment
  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
  UCR233444  Phacelia imbricata subsp. imbricata George K. Helmkamp, E. A. Helmkamp 2011-4-1 17132 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UC1051793  Phacelia mutabilis L. R. Heckard and C. R. Bell 1951-6-13 170 Colusa n slope of mt. Mendocino National Forest, Goat Mountain (ne of Bartlett Springs, along road from Bear Creek to Fouts Springs) Comment
  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
  RSA799178  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17129 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 93 Comment
  CDA32827  Phacelia tanacetifolia P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  POM289798  Phacelia tanacetifolia Lyman Benson 1935-3-27 6338 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  UCD67073  Phalaris aquatica Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5100 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. 488 Comment
  CHSC118880  Phalaris aquatica David Isle; Frank Pendell 2017-5-17 2175 Colusa Foothills E edge of N Coast Range: W of Stoneyford ~1.5 miles on 18N01.1 to Frank and Sheri Pendell Ranch; in black adobe pasture S of house ~1/8 mile. 381 Comment
  CAS-BOT-BC265957  Phalaris minor Roxana S. Ferris 1926-4-22 6287 Colusa 3 miles west of Colusa Comment
  UCD89177  Phalaris minor Hursh 1919-1 X 3340 Colusa Williams. Comment
  SEINET10657421  Phalaris minor Roxana S. Ferris 1917-4-12 Ferris 508 Colusa 4 mi. east of Williams; Alkali Plains 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
  SEINET7096814  Phlox gracilis A. G. Vestal 1985-4-5 s.n. Colusa Along Route 16 about .2 mile south of Route 20 and near Bear Creek. NAD27, 39? deg. 00'36ao , -122?_ 21'22ao (converted to WGS84 decimal degrees). Comment
  UCR206810  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-17 14389 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  UCD83810  Phoradendron bolleanum Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5957 Colusa Walker Ridge, along Walker Ridge Road, at intersection with road/trail to Mount Baldy. 880 Comment
  UCD66871  Phoradendron leucarpum subsp. tomentosum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5074 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. Just south of junction with trail that heads east to the headwaters of Thompson Creek. 634 Comment
  JEPS80199  Phoradendron libocedri L. R. Heckard and J. Hickman 1980-7-3 5354 Colusa n. side of rd. across from Summit Springs (Snow Mt., Colusa-Lake Co. boundary); Snow Mt. Comment
  UCD80895  Phragmites australis Jack Alderson; C. Thomsen 2009-3-18 24 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Headwaters of Craig Canyon. 527 Comment
  UCD82633  Phragmites australis Jack Alderson 2009-9-19 29 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near headwaters of Craig Creek. 518 Comment
  UCD58166  Phyla nodiflora Gordon Harrington 2007-5-15 56 Colusa BLM Payne Ranch. Sandy north side of Cache Creek, about 1/2 mile upstream from the confluence of Cache Creek and Bear Creek. 190 Comment
  UCR201569  Physalis lancifolia George K. Helmkamp, E. A. Helmkamp 2008-10-14 14270 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CDA5826  Physalis lancifolia Cowley Jul 1931 Colusa West of Colusa. 0 Comment
  CDA37576  Phytolacca americana J. D. 2000-4-28 PDR 019976 Colusa Zumwalt Lane, Williams. 0 Comment
  UC1051745  Pickeringia montana var. montana Helen K. Sharsmith 1953-6-20 4301 Colusa Little Stoney Creek Inner North Coast Ranges, Mendocino National Forest 762 Comment
  UCD165933  Piperia leptopetala Ellen Dean; with Tom Starbuck 2016-4-24 8844 Colusa BLM Bear Creek Ranch (formerly Payne Ranch). Lands to the southwest of the intersection of Highway 16 and Highway 20. On north-facing slope of knoll that is just south of corral area (corral at junction of Highways 16 and 20). 393 Comment
  CHSC94393  Piptatherum miliaceum Lowell Ahart 2006-8-9 13121 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 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
  JEPS118697  Pisum sativum B. Castro with T. Boullion 2011-4-20 1847 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi east of bend in Tehama-Colusa Canal. Sites 7.5' quad. Comment
  CAS-BOT-BC227984  Plagiobothrys Doris K. Kildale 1928-5-8 5016 Colusa 3 miles S of Arbucle [Arbuckle] Comment
  CHSC29710  Plagiobothrys bracteatus K. R. Stern 1980-6-1 6636 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCD57876  Plagiobothrys bracteatus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 53 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UC71656  Plagiobothrys canescens Miss Alice King 1905-4-7 Colusa College City 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
  UCR261674  Plagiobothrys distantiflorus Ann Howald 2003-3-12 2281 Colusa Inner North Coast Ranges, Indian Valley, west side of East Park Reservoir, c. 2.1 miles southeast of Stonyford, near diversion canal inflow to reservoir 369 Comment
  UCD56945  Plagiobothrys fulvus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3547 Colusa BLM Payne Ranch. On west side of Hwy. 16. 2 road miles south of intersection with Hwy. 20. 312 Comment
  UCD163215  Plagiobothrys fulvus var. campestris Craig D. Thomsen 2000-3-31 2167 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
  UCD56900  Plagiobothrys greenei Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3503 Colusa BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. 304 Comment
  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
  UCR198136  Plagiobothrys humistratus Ellen Dean, Gordon Harrington, P. McIntyre 2007-3-16 3380 Colusa BLM Payne Ranch, along Hwy 20, Destanella Flat area just east of Lake Co. border, c. 3.4 road mi west of junction with Hwy 16. Along unimproved road that goes south from Hwy 20, c. 2.3 road mi west of junction with Hwy 16, unnamed valley with old building called 'Roadkill Cafe.' 415 Comment
  HSC47742  Plagiobothrys nothofulvus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3947 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  SEINET3152906  Plagiobothrys nothofulvus M. A. King 1905-4-7 D Colusa College city 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
  POM163465  Plagiobothrys nothofulvus Roxana S. Ferris 1926-4-23 6418 Colusa At Mountain House on the Williams-Stonyford Road. Comment
  CHSC89859  Plagiobothrys scriptus B. Castro; L. P. Janeway, S. Innecken 2001-3-28 1212 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. 91 Comment
  CHSC89895  Plagiobothrys shastensis B. Castro; L. P. Janeway 2001-4-19 1233 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. At upper edge of corridor along perennial N-S-trending creek. 292 Comment
  UC78102  Plagiobothrys shastensis unknown May 1886 Colusa Stites Comment
  CDA32833  Plagiobothrys stipitatus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC107154  Plagiobothrys stipitatus var. micranthus L. P. Janeway; B. Castro 2011-5-19 10283 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh; mucky clay soil. Occasional groups of this in some parts of the marsh (no standing water now, but still mucky). 49 Comment
  CHSC114995  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-28 20115 Colusa North side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell. 53 Comment
  CHSC52671  Plagiobothrys stipitatus var. micranthus James Jokerst 1986-5-6 2304 Colusa Near Lurline Creek. Vernal pool. 41 Comment
  HSC48203  Plagiobothrys stipitatus var. micranthus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3953 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  CHSC55678  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-3 6623 Colusa North central portion of Delevan National Wildlife Refuge. 45 Comment
  HSC31306  Plagiobothrys tenellus Carter Schleicher 1974-5-4 23 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  HSC31843  Plagiobothrys tenellus Maralyn O'Meara, Gary S. Lester 1974-5-4 347 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  CAS-BOT-BC60834  Planodes virginica Doris K. Kildale 1928-5-8 5017 Colusa 3 miles south of Arbuckle. Comment
  CHSC89837  Plantago coronopus B. Castro; L. Janeway, S. Innecken 2001-5-9 1252 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Andys Canyon. Near dirt road paralleling N-S-trending perennial creek. 367 Comment
  UCSC009428  Plantago elongata Lowell Ahart 2015-4-28 20114 Colusa On the north side of Maxwell-Colusa Road, about 5 1/2 miles east of Maxwell 53 Comment
  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
  JEPS124211  Plantago erecta Lowell Ahart 2015-4-10 20004 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  UCD56669  Plantago erecta Jack Alderson 2007-3-25 5 Colusa BLM Payne Ranch. Destanella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 553 Comment
  HSC85854  Plantago erecta Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-11 Colusa Bear Valley, Bartlett Springs Rd. Comment
  UCD82366  Plantago erecta Robin McMaster 1973-4-15 336 Colusa Bear Valley. Comment
  RSA388847  Plantago erecta subsp. erecta Susan Dakuzaku 1975-4-20 28 Colusa Bear Valley Road, 9.5 miles north of State Highway 20. 404 Comment
  UCD72478  Plantago lanceolata Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3812 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
  CHSC59768  Platystemon californicus Alvin G. Cary 1975-4-20 3 Colusa Field on west side of road. Bear Valley Road, 9.6 miles north of State Highway 20. Comment
  SEINET3124160 Image available Platystemon californicus Sandra Wainwright 1969-4-13 1 Colusa Bear Valley, 9.5 miles north of State Highway 20 Comment
  UCD96073  Platystemon californicus Clinton C. Shock 1980-5-3 61 Colusa Bear Valley, about 12 miles northwest of State Highway 20. 384 Comment
  CHSC112021  Platystemon californicus David Isle 1977-4-5 2068 Colusa Mendocino National Forest. About 1.3 mile NE of Fouts Springon Upper Davis Flat. 493 Comment
  SEINET12091618  Platystemon californicus C. M. Corda 1982-1 4 Colusa Ca 0.3 mi W of jct Hwys 20 and 16, S side Bear Cr., ca 100 yds from S side Hwy 20, ca 18 mi SW of 322 Comment
  SEINET5718795 Image available Platystemon californicus Lois Goodman 1969-1 1 Colusa 9.5 miles north of State Hwy 20. Comment
  UC1051694  Platystemon californicus Helen K. Sharsmith 1953-6-18 4257 Colusa above Mill Creek near Fouts Spring (Mendocino National Forest); Inner North Coast Ranges, , Mill Cr 609 Comment
  UCSB63724  Platystemon californicus Devanna, Martin 1987-4-4 Colusa Ca. 0.3 mi w of jct Hwys 20 and 16; S side of Bear Creek; ca. 18 mi sw of Williams; Wilbur Springs Quadrangle; S central border of Sect. 36. T14N, R5W 321 Comment
  RSA590191  Platystemon californicus var. californicus Michael A. Vincent, Robert Rhode 1996-3-30 7293 Colusa Along Bear Valley Road, 4.6 miles N of junction Wilbur Springs Road Comment
  UCD56915  Plectritis ciliosa Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3518 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  UCD57101  Plectritis ciliosa Gordon Harrington; Diana Hickson 2007-4-7 0017 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile WNW of Roadkill Cafe. 470 Comment
  JEPS87664  Plectritis ciliosa subsp. ciliosa Vernon H. Oswald and Lowell Ahart 1994-4-6 6066 Colusa 1.2 mi sw of Digger Pine Flat (s of Stonyford, Goat Mountain Road at Sullivan Creek); Sullivan Creek, Goat Mountain Road 469 Comment
  UC1613289  Plectritis ciliosa subsp. ciliosa Charles M. Belshaw 1937-4-25 2848 Colusa vicinity of Cook's Spring, Devil's Ridge; Inner N. Coast Range Comment
  UCD162996  Plectritis macrocera Craig D. Thomsen 2000-3-31 2085 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.75 mile west of Hwy 20/16 intersection. 345 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
  RSA756857  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-11 14360 Colusa along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) Comment
  UCD163710  Poa annua Craig Thomsen 1999-5-10 2022 Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCR206852  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-11 14360 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UCR238903  Poa annua George K. Helmkamp, E. A. Helmkamp 2012-2-9 18535 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  UCD64275  Poa bulbosa Craig D. Thomsen 2000-3-31 2075 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD90657  Poa bulbosa Beecher Crampton 1975-4-21 9171 Colusa 3.5 miles northwest of Lodoga. Comment
  UCD64291  Poa secunda Craig D. Thomsen 2000-4-12 2130 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC236332  Poa secunda subsp. secunda Roxana S. Ferris 1926-4-23 6583 Colusa Field 2 miles from Stonyford Comment
  CHSC112213  Poa secunda subsp. secunda Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18643 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC77408  Poa secunda subsp. secunda Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  UCD90806  Poa secunda subsp. secunda Beecher Crampton 1958-4-21 4729 Colusa Southwestern Colusa County. 7.8 miles NW of Rumsey, along Hwy 16, just above junction of Bear Creek with Cache Creek. 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
  JEPS68348  Polanisia dodecandra subsp. trachysperma L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2788 Colusa ca. 2 mi. n.w. Sites 243 Comment
  SD262256  Polanisia dodecandra subsp. trachysperma David Isle 2014-7-27 2137 Colusa Northern California Foothills: north side of Maxwell Road, c. 2 miles west of Sites and 5.8 miles east of summit of Maxwell Grade. 128 Comment
  JEPS104398  Polygonum amphibium var. emersum Lowell Ahart 2003-10-23 10656 Colusa In East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  UC6655  Polygonum aviculare subsp. aviculare J. Burtt Davy May, 1898 Colusa near Willows Comment
  CAS-BOT-BC413965  Polygonum aviculare subsp. aviculare Roxana Stinchfield 1916-6-17 292 Colusa Near College City Comment
  CAS-BOT-BC413966  Polygonum aviculare subsp. aviculare Karl H. Rechinger 1953-4-11 s.n. Colusa 3 miles east of Maxwell Comment
  JEPS75842  Polygonum minimum L. R. Heckard 1974-9-10 3902 Colusa West Peak Snow Mt. (ne slope) 2103 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
  UC821244  Polypogon maritimus Roxana Stinchfield 1916-6-17 287 Colusa near College City (Tule); Tule 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
  UCD61440  Polypogon monspeliensis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3885 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
  UCD61444  Polypogon monspeliensis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3889 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NW of parking lot. 339 Comment
  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
  JEPS75871  Polystichum imbricans subsp. imbricans L. R. Heckard 1974-9-9 3857 Colusa ca. 1/4 mi se Foutch Camp; Snow Mt. 1828 Comment
  UC1179041  Populus fremontii subsp. fremontii Herbert L. Mason 1947-3-29 13158 Colusa along Butte Creek ca 3 mi ne Colusa (Butte Sink); along Butte Creek, Butte Sink Comment
  UCD83719  Populus fremontii subsp. fremontii Joseph Schlottman; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  UC1099840  Potamogeton pectinatus Herbert L. Mason 1946-8-6 12957 Colusa 4 mi s of Colusa (on Colusa-Marysville Highway, w side of Sacramento River); Sacramento River Comment
  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
  RSA0013900  Proboscidea louisianica J. C. Roos 1948-9-2 4024 Colusa West of Williams. Comment
  JEPS80440  Prunella vulgaris var. lanceolata L. R. Heckard and J. Hickman 1980-7-3 5369 Colusa sw slope Snow Mt. (about Summit Springs); sw slope Snow Mt., Summit Springs 1554 Comment
  CHSC1582  Prunus emarginata F. Wigmore 1931-5-1 Colusa Stony Creek gorge. Comment
  JEPS80050  Prunus emarginata L. R. Heckard with J. Hickman 1979-6-15 5050 Colusa Snow Mountain, East trail from Frog Pond to cirque of east and w peaks Snow Mountain 1981 Comment
  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
  JEPS80806  Pseudotsuga menziesii var. menziesii L. R. Heckard and J. Hickman 1981-7-30 5777 Colusa along upper (e side) Miller Camp Meadow; Snow Mt. 1874 Comment
  CHSC107119  Psilocarphus brevissimus var. brevissimus L. P. Janeway; B. Castro 2011-4-27 10241 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.3 km northeast of Tehama-Colusa Canal. On bare ground in re-vegetating old vehicle tracks through north edge of the marsh. 49 Comment
  CHSC89836  Psilocarphus oregonus B. Castro; L. Janeway, S. Innecken 2001-5-9 1251 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Near dirt road paralleling N-S-trending perennial creek. 367 Comment
  UC1601294  Psilocarphus oregonus T. S. Brandegee Colusa Williams Comment
  CHSC115394  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa Along the south edge of Leesville Road, about 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. 445 Comment
  JEPS124212  Psilocarphus tenellus Lowell Ahart 2015-4-10 20007 Colusa About 1/2 mile east of Leesville, about 12 miles (air) northwest of Williams. Comment
  UC1613326  Psilocarphus tenellus Charles M. Belshaw 1937-4-1 2871 Colusa vicinity Cook's Spring (Devil's Ridge); Inner N. Coast Range, Devil's Ridge 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
  JEPS73504  Pterospora andromedea L. R. Heckard 1972-7-10 3121 A Colusa near Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  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
  CHSC79550  Pterostegia drymarioides B. Castro; L. P. Janeway 2000-5-2 1120 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  JEPS121101  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  CAS-BOT-BC462851  Pyrola asarifolia F. P. Cronemiller 1924-6-26 893 Colusa Upper Lotto Meadow 1371 Comment
  JEPS75754  Pyrola dentata L. R. Heckard and R. Bacigalupi 1976-9-6 4436 Colusa East of Trout Creek crossing, Snow Mountain 1859 Comment
  JEPS80464  Pyrola picta Alice Q. Howard 1972-7-10 8 A Colusa Trail from Fouts Camp to Box Springs, tje highest of the two such areas on the North side of the ridge separating Trout and Paradise Creek. Snow Mountain 1676 Comment
  UC1562605  Pyrola picta Barbara Ertter 1989-7-1 8593 Colusa 12 air wsw of Stonyford (road to Goat Mountain Lookout 2.2 mi s of Rte M-10 (Bear Creek-Fouts Spring Rd) at head of South Fork Stony Creek); South Fork Stony Creek 1500 Comment
  JEPS75762  Quercus L. R. Heckard, and R. Bacigalupi 1976-9-6 4451 Colusa Fouts Camp-Summit Spring trail Snow Mt. 1584 Comment
  UCD84511  Quercus berberidifolia Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6062 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CHSC90879  Quercus chrysolepis D. Isle 2003-6-25 215 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. 1767 Comment
  SFV876  Quercus douglasii S. C. Schank 1960-4-10 40 Colusa Bear Valley. Slope several hundred feet from creek. Comment
  UCD45869  Quercus dumosa Hans G. Jung 1976-4-17 6 Colusa California, Colusa County: 2 miles west of Bear Valley, on north end of Walker Ridge, T15N, R6W, sec. 11. Elevation 1800 feet. 548 Comment
Read comments
Apr 18 2009
  UCD41209  Quercus durata John Snelling 1986-5-17 3 - Colusa 5.7 mi. west of Stoneyford along Fouts Spring Road. Comment
  UCD84510  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6061 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD84514  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6065 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCR45095  Quercus durata L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CHSC48382  Quercus durata var. durata Vernon Oswald 1986-5-12 2008 Colusa Brim Rd. (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  HSC71306  Quercus durata var. durata Thomas W. Nelson, Jane P. Nelson 1979-4-12 4620 Colusa Along Stony Creek below Digger Pine Campground Comment
  CHSC92580  Quercus garryana var. breweri D. Isle 2005-7-14 1154 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. In saddle of Board Camp Ridge on 17N10, SE of the Homesites about 1 mile. SE of Boardcamp gate at the junction with OHV Trail 06 and road 17N10. 1633 Comment
  JEPS82547  Quercus garryana var. breweri L. R. Heckard 1983-7-27 6112 Colusa s flank Snow Mt. (slopes around Summit Springs) Comment
  RSA749734  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  RSA758621  Quercus lobata George K. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  UC1179011  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Sink, Butte Creek Comment
  SBBG111416  Quercus palmeri R. Raiche 1990-12-2 Colusa across Sulphur Crk from Wilbur Springs Comment
  UCD14526  Quercus palmeri Roger Raiche 1990-12-2 C Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  UCD14528  Quercus palmeri Roger Raiche 1990-12-2 E Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  JEPS73455  Quercus vacciniifolia L. R. Heckard 1972-7-8 3056 Colusa se of Snow Mt.; West Peak 1981 Comment
  CDA15554  Quercus wislizeni var. frutescens G. F. Hrusa 1998-11-7 14905 Colusa North Coast Ranges; Above Fouts Springs on Trough Springs Rd. mi. 2.7. Comment
  UCR225462  Quercus wislizeni var. frutescens Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5116 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail 548 Comment
  CHSC45699  Rafinesquia californica Vernon Oswald 1986-5-12 2004 Colusa Sites-Lodoga Rd. 0.2 mi w of Grapevine Pass. Roadside. 487 Comment
  JEPS121102  Rafinesquia californica Lowell Ahart 2013-5-1 18670 Colusa On the E side of Bear Valley Road, about 2.5 road miles NW of intersection of Hwy 20 and Bear Valley Road. Comment
  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
  UCD159337  Rafinesquia californica D. S. Park; E. Dean 2010-6-5 121 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  UC1745757  Ranunculus Annetta M. Carter, Sarah Dyal, Ethel Crum 1938-5-8 1390 Colusa 5.5 mi. S of Leesville. Bear Valley. 426 Comment
  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
  CDA19005  Ranunculus aquatilis var. aquatilis R. Breckenridge 2000-9-25 PDR 958947 Colusa East Park Reservoir, including coves on northern end of reservoir in the vicinity of Stonyford. 0 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
  CAS-BOT-BC378936  Ranunculus californicus var. californicus Roxana Ferris 1917-4-15 612 Colusa Sycamore Slough Comment
  POM163507  Ranunculus californicus var. rugulosus Roxana S. Ferris 1926-4-21 6296 Colusa Colusa County: abandoned rice field, 2 miles W of Colusa Comment
  CHSC77467  Ranunculus canus Vernon H. Oswald 2000-3-29 9904 Colusa Bear Valley Road 4.5 mi south of Brim Road. 405 Comment
  SEINET11587858  Ranunculus canus Unknown 2009-3-11 14373 Colusa Williams Comment
  UC1049533  Ranunculus canus Rimo Bacigalupi 1950-4-16 3125 Colusa about B.M. 1326 (along road down middle of valley, along creek); Bear Valley, Bear Creek Comment
  UCR47929  Ranunculus canus Dave Read 1975-4-20 08 Colusa Inner Coastal Ranges. Bear Valley Road, 8.7 miles north of intersection with State Highway 20 412 Comment
  SEINET4208544  Ranunculus canus var. canus Richard R. Halse 2013-3-26 8740 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams.; 0 157 Comment
  JEPS87655  Ranunculus hebecarpus Vernon H. Oswald and Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  JEPS87656  Ranunculus hebecarpus Vernon H. Oswald and Lowell Ahart 1994-4-6 6057 Colusa Goat Mtn. Rd. 0.1 mi ne Digger Pine Flat (s of Stonyford) 463 Comment
  SEINET4208857  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with Stat Hwy. 20, west of Williams.; 0 157 Comment
  UCD169733  Ranunculus hebecarpus Richard R. Halse 2013-3-26 8739 Colusa Along the Leesville Road ca. 5.6 miles northwest of its junction with State Hwy. 20, west of Williams. 157 Comment
  UCD83757  Ranunculus occidentalis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5953 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  CAS-BOT-BC74220  Raphanus sativus Roxana Stinchfield 1916-7-11 438 Colusa Stinchfield Ranch near Sycamore. Comment
  JEPS75868  Rhamnus californica L. R. Heckard 1974-9-10 3880 Colusa East Circle Trail, along spur running se from the w peak, Snow Mt. Snow Mt. 2011 Comment
  CHSC39791  Rhamnus ilicifolia Eloise Gallatin 1935-5-12 Colusa Above Stonyford. Comment
  UC1051715  Rhamnus purshiana Helen K. Sharsmith 1953-6-19 4265 Colusa near confluence of North and Middle Forks of Stoney Creek (Red Bridge Camp); Inner North Coast Ranges, Mendocino National Forest 548 Comment
  CDA16114  Rhamnus tomentella subsp. crassifolia G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15239 Colusa North Coast Ranges; Along Little Stony Creek. 0 Comment
  CHSC75745  Rhamnus tomentella subsp. crassifolia Vernon H. Oswald; Lowell Ahart 1999-6-22 9785 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. Common shrub on a roadcut and on the rocky bank of Little Stony Creek. 426 Comment
  CHSC88560  Rhamnus tomentella subsp. crassifolia L. P. Janeway; B. Castro 2001-6-3 7096 Colusa Inner North Coast Ranges. Spring near head of Doyle Canyon on east side of Walker Ridge, about 2.7 km (air) south of Bartlett Springs Road. 799 Comment
  JEPS42073  Rhamnus tomentella subsp. crassifolia J. D. Coffman 1923-6-4 Colusa betw Leesville and Bartlett Sprs; <Briona Hill?> Comment
  RSA289466  Rhamnus tomentella subsp. crassifolia Edward Lee, C. M. Belshaw 1936-12-13 2612 Colusa Stonyford - Lodoga Road Comment
  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
  CDA40545  Rhamnus tomentella subsp. crassifolia P. S. Crane 1979-8-14 s.n. Colusa 4 miles west of Ladoga Road on Goat Mountain. 0 Comment
  JEPS80808  Rhamnus tomentella subsp. tomentella L. R. Heckard and J. C. Hickman 1981-7-31 5780 Colusa e side Snow Mt.; , Fouts Springs Overlook 1783 Comment
  CHSC75707  Rhododendron occidentale Vernon H. Oswald; Lowell Ahart 1999-6-22 9788 Colusa 2.2 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek. 426 Comment
  HSC63082  Rhus aromatica David Wheeler 1979-4-14 63 Colusa Buck Flat, Walker Ridge, on the way to Barrel Springs. 884 Comment
  HSC71304  Rhus aromatica Thomas W. Nelson, Jane Nelson 1979-4-12 4622 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD82135  Rhus aromatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5667 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
  JEPS80123  Ribes binominatum L. R. Heckard with J. Hickman 1980-7-1 5281 Colusa ca. 10 mi w Stonyford (cirque between West and East Peaks); Snow Mt. 2042 Comment
  CHSC89876  Ribes malvaceum B. Castro; L. Janeway 2001-5-3 1245 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. In dry creekbed. Near junction of this side-cyn with dirt road paralleling N-S-trending perennial creek 365 Comment
  UCD120073  Ribes quercetorum Gordon Harrington 2012-2-14 s.n. Colusa N side of Hwy 20 and Salt Creek Canyon between Hwy 16 and the Central Valley. Bear Valley Ranch property. Top of small canyon. 306 Comment
  CAS-BOT-BC293684  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest. Dixie Glade Campground 918 Comment
  CHSC86870  Rigiopappus leptocladus B. Castro; Beth Hendrickson 2003-4-7 1418 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. 167 Comment
  UC1543162  Rigiopappus leptocladus Charlotte G. Nast 1936-4-17 148 Colusa Williams to Lake Co. Road Comment
  UC630433  Rigiopappus leptocladus Annetta Carter 1938-5-7 1372 Colusa 4 mi n Rumsey (Comanche Hills); Inner North Coast Range, Comanche Hills 243 Comment
  UCD57298  Rigiopappus leptocladus Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3669 Colusa BLM Payne Ranch. Near junction of Craig and Thompson Canyons. West of Hwy. 16, ca. 2 road miles south of junction of Hwy. 20 and Hwy. 16. Upslope of unimproved road, above side branch of Craig Canyon, downslope of saddle separating Craig and Thompson Canyons. 370 Comment
  UCD82862  Rigiopappus leptocladus Gordon Harrington 2008-4-13 73 Colusa BLM Payne Ranch. Slopes to the SW of junction of Hwy 16 and Hwy 20. E of unnamed creek (flowing now). 385 Comment
  CHSC85959  Rosa californica Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  JEPS104207  Rosa californica Lowell Ahart 2003-10-23 10677 Colusa Along Squaw Creek, just south of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  UC72992  Rosa californica H. P. Chandler 1905-9-14 Colusa Princeton 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
  UCD82155  Rumex conglomeratus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5681 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  JEPS81280  Rumex crispus L. R. Heckard and J. C. Hickman 1982-7-5 5891 Colusa s of (slope below) Summit Springs (s side of Snow Mt.); Snow Mt. 1500 Comment
  UCR206365  Rumex pulcher George K. Helmkamp, E. A. Helmkamp 2009-5-20 14745 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  CDA2395  Saccharum ravennae Gordon Leppig 2001-3-29 1541 Colusa Route 16, 100 meters east of mile marker 4.58. 0 Comment
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Jul 31 2014
  CAS-BOT-BC445795  Sagittaria montevidensis Milo S. Baker 1946-9-5 11632 Colusa Along Hiwy. between Colusa and Williams 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
  CHSC78976  Salicornia virginica Vernon H. Oswald; Joseph G. Silveira 2000-9-29 9972 Colusa Delevan National Wildlife Refuge. 15 Comment
  HSC71300  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4626 Colusa Along Stony Creek below Digger Pine Campground Comment
  HSC71301  Salix breweri Thomas W. Nelson, Jane Nelson 1979-4-12 4525 Colusa Along Stony Creek below Digger Pine Campground Comment
  UC1356325  Salix breweri Theodore J. Crovello 1965-4-26 686 Colusa along Bartlett Springs Rd. 2.5 mi w junction with Bear Valley Road Comment
  UCD163852  Salix breweri Craig D. Thomsen 2000-6-7 2368 a Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC77371  Salix exigua Heidi West; Beth Hendrickson, Natalie Wight 1999-3-25 Colusa Vicinity of Sites and Sites-Ladoga Road. 109 Comment
  UCD41161  Salix exigua N. Williams 2002-3-28 148 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  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-BC107839  Salix gooddingii Gordon H. True 1968-8-6 4576 Colusa In roadside ditch, on Hwy. between Maxwell and Delevan, ca. 1 mile N of Maxwell 30 Comment
  CHSC80068  Salix gooddingii L. P. Janeway; B. Castro 2000-4-10 6662 Colusa Vicinity of Lurline Creek and Sulphur Gap. 91 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
  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
  UCD164153  Salix laevigata Craig Thomsen 1999-4-27 1999 Colusa Bear Creek Canyon. Along Bear Creek, just north of Sulphur Creek confluence, next to Wilbur Bridge. Comment
  CDA16094  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges; Goat Mountain on S side. 1722 Comment
  CHSC96763  Salix lasiolepis G. F. Hrusa 1999-5-16 15049 Colusa North Coast Ranges. UTM 10S, 4346931 N, 0523542 E. Below summit ridge of Goat Mountain on S side. 1722 Comment
  UCD111629  Salix lasiolepis G. F. Hrusa 1996-2-26 12636 Colusa Little Stony Creek, Goat Mtn. Rd. approx. 3 miles SW of intersection with Stonyford-Lodoga Rd. 475 Comment
  CHSC78978  Salsola soda Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9978 Colusa Delevan National Wildlife Refuge. Adjecent to the main refuge road 0.2 mi north of Maxwell-Colusa Rd. 18 Comment
  JEPS98267  Salsola soda Vernon H. Oswald and Joseph G. Silveira 2000-10-12 9978 Colusa Delevan National Wildlife Refuge; adjacent to the main refuge road 0.2 mi N of Maxwell-Colusa Road 18 Comment
  SBBG121614  Salsola soda L. Ahart 2006-9-26 13348 Colusa N side of Maxwell Rd, ca. 3 mi W of Colusa Princeton Rd, between ditch and Delevan Nat Wildlife Refuge 24 Comment
  SEINET12765122  Salsola soda Lowell Ahart 2006-9-26 13348 Colusa Between the deep ditch and Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell.; 0 24 Comment
  CHSC27518  Salvia columbariae Michael F. Henetz 1978-4-15 16 Colusa Ca. 65 m n of Salt Creek, ca 15 m n of Hwy. 20, ca. 17.7 km wsw of Williams. 143 Comment
  CHSC27550  Salvia columbariae Scott E. Patton 1978-4-9 7 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 m wsw of Williams. 143 Comment
  HSC62788  Salvia columbariae J. M. DiTomaso 1979-4-14 874 Colusa Bear Valley Rd., 3.9 mi. N of S.R. 20, next to Bear Creek. 412 Comment
  UCD41199  Salvia columbariae James Salyards 1986-5-17 86 - Colusa Along Sites-Lodoga Road, 8.2 mi. west of Sites. Comment
  SEINET12318609  Salvia columbariae K. A. Smail 1978-1 s.n. Colusa Salt Canyon, N side of Salt Creek, Hwy 20, 11 mi WSW of Williams. Wilbur Springs Quadrangle, 15'* 143 Comment
  CAS-BOT-BC238628  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield Ranch Comment
  CAS-BOT-BC230039  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  JEPS228  Sanicula bipinnatifida W. L. Jepson 1932-5-8 16273 Colusa Lodoga; w Colusa Co. Comment
  CHSC89863  Sanicula crassicaulis B. Castro; L. P. Janeway 2001-4-19 1232 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. In riparian corridor along dirt road adjacent to perennial N-S-trending creek. 277 Comment
  UCD57664  Sanicula crassicaulis Erica A. Smith; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, where road crosses Craig Creek. 313 Comment
  UCD146697  Sanicula graveolens G. F. Hrusa 1998-6-19 14633 Colusa on NE side of Goat Mountain. 1710 Comment
  UCD56685  Sanicula tuberosa Gordon Harrington 2007-3-25 10 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 584 Comment
  UCD81232  Schedonorus arundinaceus Ellen Dean; K. Mawdsley, B. Rice 2009-5-6 5569 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Along Bear Creek south of Brophy Canyon, near old access road that leaves Hwy. 16 near milepost 6. 220 Comment
  CHSC110853  Schoenoplectus acutus var. occidentalis David Isle; Rhonda Isle 2013-6-27 2046 Colusa Above (S of) 18N01, ~200 yards NW of jct with OHV Trail 17N12; (~3/4 mi SW of Fouts Springs Loop Rd, E side). 670 Comment
  CHSC83435  Schoenoplectus americanus Bill Maslach 2001-6-6 13 Colusa About 17 km east of Hwy. 5 along Hwy 20. Intersection of Salt Cr. and Hwy. 20; about 50 m downstream of bridge marked '1930.' On creek bank and in creek. 175 Comment
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Jul 20 2006
  CAS-BOT-BC7623  Schoenoplectus americanus A. A. Heller 1916-6-9 12390 Colusa Coast Range about 8 miles west of Williams in the blue oak belt. Comment
  UCD72537  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3828 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.25 mile downstream of bridge. 251 Comment
  JEPS95824  Schoenoplectus pungens var. longispicatus Vernon H. Oswald and L. Ahart 1999-6-22 9772 Colusa Fouts Springs Rd. (M10) 6.7 mi west of Stonyford-Elk Creek Rd.: T18N R7W Sect. 33, 1960 ft, chaparral, serpentine substrate 597 Comment
  CHSC94462  Schoenoplectus tabernaemontani Lowell Ahart 2006-8-22 13214 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UC1055825  Scirpus acutus var. occidentalis Frank W. Gould 1940-5-15 1257 Colusa 2.5 mi n Maxwell (in marshes along roadside); n of Maxwell Comment
  CDA2621  Scirpus glaucus M. R. Pryor 1947-5-1 Colusa Grimes (col. near Biggs) 0 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
  CHSC62952  Scribneria bolanderi Vernon H. Oswald; Lowell Ahart 1994-4-6 6059 Colusa Goat Mtn. Rd. 0.8 mi SW of Digger Pine Flat, S of Stonyford. Flat bordering the road. 481 Comment
  UCD163345  Scribneria bolanderi Craig D. Thomsen 2000-5-11 2351 Colusa Walker Ridge. Buck Flat. 129 Comment
  UCD81728  Scutellaria siphocampyloides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5730 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  JEPS62862  Scutellaria tuberosa Alice King May 1906 Colusa College City Comment
  UCD163697  Secale cereale Craig Thomsen 1999-5-10 2003 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  JEPS73510  Sedum obtusatum subsp. boreale L. R. Heckard 1972-7-10 3128 A Colusa among rocks of promontory on se corner of Snow Mt. overlooking and 3 mi nw Fouts Springs; se corner Snow Mt., nw of Fouts Springs 1828 Comment
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Aug 17 2011
  CHSC94415  Senecio sylvaticus Lowell Ahart 2006-8-9 13158 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC6689  Senecio vulgaris Marilyn Lee 1968-3-30 119 Colusa North side of Hwy. 16 at junction of Hwy. 16 and Hwy. 20. Between Hwy. 16 and Cache Creek. Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  SEINET3876301 Image available Sequoia sempervirens James H. Smith 1976-1 s.n. Colusa Williams.; 0 Comment
  CHSC94402  Setaria viridis Lowell Ahart 2006-8-9 13137 A Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94412  Setaria viridis Lowell Ahart 2006-8-9 13137 B Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  HSC48139  Sidalcea calycosa subsp. calycosa Thomas W. Nelson, Jane Nelson 1978-4-29 3951 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS120911  Sidalcea diploscypha Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18647 Colusa Rocky serpentine outcrop on the N side of Hwy 20, just E of the Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams Comment
  UCD82533  Sidalcea diploscypha Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5685 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
  HSC79083  Sidalcea diploscypha M. A. Strull, C. Houseman, L. Linstedt 1984-4-28 9 Colusa 6 mi. E of Bartlett Springs Rd. on Brimm Rd. 488 Comment
  SBBG117358  Sidalcea diploscypha R. E. Rolley 1977-5-8 Colusa 0.3 mi NNW on Bear Valley Rd from Hwy 20 Comment
  UCD163840  Sidalcea hartwegii Craig D. Thomsen 2001-4-12 2470 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC110123  Sidalcea keckii L. P. Janeway 2011-5-11 10278 Colusa Inner North Coast Ranges. Recreation area on southwest side of East Park Reservoir, 0.5 km south-southwest of the dam; 3.7 air km southeast of Stonyford. 374 Comment
  CHSC110124  Sidalcea keckii L. P. Janeway 2011-5-11 10279 Colusa Inner North Coast Ranges. Southeast side of East Park Reservoir, recreation and camping area; 1.4 km north of Sites-Lodoga Road. 373 Comment
  JEPS80829  Sidalcea oregana subsp. hydrophila L. R. Heckard and J. C. Hickman 1981-7-31 5800 A Colusa e side Snow Mt. , Dark Hollow Creek (Dark Hollow Creek) 1645 Comment
  UC583287  Silene californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi nw Rumsey; nw of Rumsey 304 Comment
  UC852801  Silene californica A. A. Heller 1937-4-24 15351 Colusa on Highway #20, 15 mi w Williams; w of Williams Comment
  POM174579  Silene californica Roxana S. Ferris 1926-4-23 6444 Colusa Near top of Grapevine Grade on Stonyford-Sites Road. Comment
  SD72209  Silene californica Eugene Memmler 1969-5-8 102 Colusa Valley side of coastal hills between Williams and Clear Lake, Highway 20. 149 Comment
  HSC62780  Silene campanulata subsp. glandulosa Thomas Wood 1979-4-14 108 Colusa 1067 Comment
  CHSC115387  Silene laciniata subsp. californica Lowell Ahart 2015-4-1 19992 Colusa Along 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
  CHSC79487  Silene laciniata subsp. californica B. Castro; L. P. Janeway 2000-5-3 1125 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 313 Comment
  RSA0060081  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles west northwest of its junction with State Hwy. 20. 378 Comment
  UCD56658  Silene laciniata subsp. californica Sam Bledsoe 2007-3-25 4 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
  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
  CAS-BOT-BC389256  Silene lemmonii Volney Rattan 1884-6-1 s.n. Colusa Summit above Fouts Sp. Coast Mts. North of San Francisco Bay Comment
  CHSC32220  Silene verecunda James Jokerst 1980-8-6 1053 Colusa North Coast Ranges. Near Snow Mountain (west). Ridge top. Comment
  JEPS73457  Silene verecunda subsp. platyota L. R. Heckard 1972-7-8 3061 Colusa saddle between East and West Peaks of Snow Mt. saddle between East and West Peak of Snow Mt. 1981 Comment
  JEPS83163  Sinapis alba L. R. Heckard with J. Hickman 1980-7-3 5332 a Colusa SW Snow Montain, just W of Summit Springs 1548 Comment
  CAS-BOT-BC74903  Sinapis arvensis Roxana S. Ferris 1917-4-12 513 Colusa 4 mile east of Williams. Comment
  HSC72145  Sisymbrium altissimum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9558 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD61438  Sisymbrium altissimum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3883 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1000 ft NNW of parking lot. 314 Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  JEPS124249  Sisymbrium orientale Lowell Ahart 2015-4-1 19993 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
  JEPS120994  Sisyrinchium bellum Lowell Ahart 2013-4-26 18644 Colusa Rocky serpentine outcrop on the north side of Hwy 20, just east of Lake County line, 12.2 air miles east northeast of the town of Clear Lake, 17.1 air miles west of Williams. Comment
  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
  IRVC29851  Smilacina racemosa Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5038 Colusa Snow Mtn; Summit Spring Trail; between Snow Mtn West summit and Cedar Camp. Southern Northern Inner Coast Ranges 2012 Comment
  CHSC112626  Solanum americanum Lowell Ahart 2013-10-1 19082 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
  CHSC63425  Solanum elaeagnifolium Vernon H. Oswald 1994-7-18 6411 Colusa Near the S boundary of the Sacramento National Wildlife Refuge located S of Willows, on the S side of Cell 3 of Pool 11 bordering Hunters Creek. Along a levee road. 21 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
  CHSC90168  Solanum parishii Gary R. Koses 1979-3-31 18 Colusa Salt Canyon, n side of Salt Creek, hwy 20, 11 mi wsw of Williams. 143 Comment
  NY821077  Solanum parishii R. C. F. Bacigalupi 1950-4-25 3175 Colusa "Grapevine Grade" to Lodoga, ten miles northwest of Sites Comment
  NY821173  Solanum parishii R. J. Stinchfield 1916-6-18 299 Colusa Near College City Comment
  HSC72773  Solanum parishii Brian H. McMurtry 1979-3-31 1 Colusa N side Salt Canyon Hwy. 20, 11 mi. WSW of Williams 143 Comment
  CAS-BOT-BC157050  Solanum umbelliferum R. S. Ferris 1917-4-14 590 Colusa Along Sand Creek, Arbuckle - Rumsey Road Comment
  CAS-BOT-BC157051  Solanum umbelliferum R. J. Stinchfield 1916-6-18 299 Colusa Timber near College City Comment
  JEPS16203  Solanum umbelliferum Rimo Bacigalupi, Arthur Holmgren 1950-4-25 3175 Colusa 10 mi nw of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  CDA15550  Solidago canadensis subsp. elongata G. F. Hrusa 1998-10-28 14901 Colusa North Coast Ranges; Little Stony Ck. along Cedar Camp Rd. as it enters cyn., approx. 1 mi. from Lodoga/Stonyford Rd. Comment
  JEPS105309  Solidago elongata Dean W. Taylor 1994-10-7 14713 Colusa Little Stony Creek along Goat Mountain Road 2.1 miles West from junction Lagoda-Stonyford Road, 426 Comment
  CDA32941  Sonchus oleraceus Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  CAS-BOT-BC236519  Sorghum bicolor J. H. Thomas 1960-8-29 8845 Colusa About 5.3 miles east of Lake-Colusa County line along Highway 20 between Clearlake and Williams Comment
  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
  CAS-BOT-BC390299  Spergularia macrotheca var. macrotheca Malcom A. Nobs; S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan Comment
  CHSC53948  Spergularia marina Vernon H. Oswald 1991-4-21 4525 Colusa Two Mile Rd, 3.7 mi south of Maxwell Colusa Rd. On a flat along edge of road through rice fields. 27 Comment
  CHSC79491  Spergularia marina L. P. Janeway; B. Castro 2000-3-23 6634 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 Comment
  CAS-BOT-BC390765  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 636 Colusa 2 mi. so. of Maxwell Comment
  CAS-BOT-BC390766  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 641 Colusa 5 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
  UC884260  Stachys ajugoides var. ajugoides Roxana Stinchfield 1916-7-11 427 Colusa near Sycamore Slough; Davis Tule Comment
  CHSC94482  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13118 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC94516  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CHSC95011  Stachys ajugoides var. rigida Lowell Ahart 2006-10-31 13539 Colusa On the south side of road M 10, about 6 miles by road west of Stonyford. 583 Comment
  JEPS75731  Stachys ajugoides var. rigida L. R. Heckard 1974-9-9 3869 Colusa se Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  CHSC106246  Stachys albens B. Castro; L. P. Janeway 2001-6-3 1256 Colusa Inner North Coast Ranges. Spring at Grapevine flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. East-facing slope/bench with large springy/meadowy area. 880 Comment
  JEPS95820  Stachys albens Vernon H. Oswald and L. Ahart 1999-6-22 9784 Colusa 1.5 mi west of Stonyford-Lodoga Road on County Road 42 paralleling Little Stony Creek: T17N R6W Sect. 29, ca. 1400 ft, 1180 ft, chaparral, serpentine substrate 426 Comment
  UCD70231  Stachys albens D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC94315  Stachys pycnantha Lowell Ahart 2006-8-9 13092 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  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
  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
  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
  UCR212364  Stellaria media Craig D. Thomsen 2000-3-31 2074 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
  UCD164038  Stellaria nitens Amber Flores 2016-4-9 4 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. On lower slopes of hill just south of corral at 16 and 20. 343 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
  CHSC79473  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner North Coast Ranges. Slope along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  CHSC79695  Stephanomeria virgata subsp. pleurocarpa G. F. Hrusa 1998-10-28 14899 Colusa Inner Coast Ranges. Along Cedar Camp Rd. as it enters Little Stony Ck. Cyn., approx. 1 mi. from Lodoga/Stonyford Rd. 400 Comment
  CHSC89451  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2004-10-4 11424 Colusa On the east side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. 369 Comment
  UCD169457  Stephanomeria virgata subsp. pleurocarpa Lowell Ahart 2004-10-4 11424 Colusa Leesville Ladoga Road and Leesville Road, northeast of Bear Valley, about 4.7 miles by road southeast of the intersection fo Bear Valley Road, on the east side of Leesville Road. 369 Comment
  CHSC27624  Streptanthus breweri Robert Schlising; Timothy Spira 1978-5-13 3245 Colusa Ca 0.5 mi NW jct Hwy 20 and Bear Valley (= Wilbur Springs) Road, along latter. Comment
  JEPS96909  Streptanthus breweri Dean W. Taylor 1998-6-16 16663 Colusa Bear Valley road 1.5 mi NW junction Highway 120; near mouth Warnick Canyon 350 Comment
  UCD70220  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine annual grasslands in serpentine chaparral edges. 370 Comment
  CAS-BOT-BC61234  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  HSC72216  Streptanthus breweri Thomas W. Nelson, Jane P. Nelson 1980-6-24 5872 Colusa Colusa-Lake County line, along trail to Snow Mtn., 0.5 mi. from trailhead 1616 Comment
  UC1292771  Streptanthus breweri Freed W. Hoffman 2784 Colusa N of road from Leesville to Bartlett Springs, along the summit between Colusa and Lake counties Comment
  CHSC48348  Streptanthus breweri var. breweri Vernon Oswald 1984-5-2 1166 Colusa Fouts Springs Rd. (M10) in the Mendocino National Forest, 5.1 mi w of Stonyford. 548 Comment
  UC956515  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 Comment
  UCD57659  Streptanthus breweri var. breweri Madeline Christopher; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Eastern/Central part of ranch. Craig Canyon. North side of unimproved road. 335 Comment
  UCD58119  Streptanthus breweri var. breweri Ellen Dean; PLB 102 Class 2007-4-29 3714 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Craig Canyon. Along unimproved road. 328 Comment
  UCD66907  Streptanthus breweri var. breweri Jack Alderson 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the WNW of Cowboy Camp on the west side of Bear Creek. 427 Comment
  SEINET11993369  Streptanthus breweri var. hesperidis Unknown 1985-1 50460 Colusa Walker Ridge, Brim Rd nr intersection W Walker Ridge Rd Comment
  CHSC35582  Streptanthus glandulosus J. P. Smith; Tom Nelson, Jane Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 365 Comment
  CHSC56756  Streptanthus glandulosus Joel Hoskins 1989-4-1 1 Colusa Ca. 5 yds n of Hwy 20, Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi. wsw of Williams. 143 Comment
  CHSC7033  Streptanthus glandulosus Bryan C. Willingham 1969-4-12 19 Colusa At n side Salt Creek in Salt Canyon, ca. 1 1/2 mi s Three Sisters Peak. 146 Comment
  RSA293147  Streptanthus glandulosus J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9565 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UC596393  Streptanthus glandulosus subsp. glandulosus R. F. Hoover 1938-4-23 3205 Colusa grade on Rumsey-Arbuckle road Rumsey-Arbuckle road Comment