Search Results — 2000 specimen records retrieved (1628 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/consortium/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CDA25791  Abutilon theophrasti G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14263 Colusa Sacramento Valley; Along River Road (generally following the Sacramento River), 8.4 miles north of Colusa. 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
  UCD80834  Acer macrophyllum Ellen Dean; G. Harrington, J. Alderson, M. Bibbo, B. Rice 2009-3-25 5291 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Canyon to the north of Brophy Canyon. 239 Comment
  POM163502  Acer negundo subsp. californicum Roxana S. Ferris 1926-4-22 6301 Colusa Near Sycamore. Comment
  CAS-BOT-BC21709  Achillea millefolium J. Clausen 1939-6-26 1743 -2 Colusa 17 miles west of Williams, just before entering Lake County Comment
  CAS-BOT-BC21712  Achillea millefolium J. Clausen 1939-6-26 1743 Colusa 17 miles west of Williams, just before entering Lake County Comment
  JEPS75875  Achnatherum lemmonii L. R. Heckard 1974-9-11 3946 Colusa e of Foutch Camp; Snow Mt., Trout Creek 1889 Comment
  JEPS80192  Achnatherum lemmonii L. R. Heckard and J. Hickman 1980-7-3 5343 Colusa w of Summit Springs (sw of Snow Mt.; 10 mi w of Stonyford); Snow Mt., Summit Springs 1548 Comment
  CDA11422  Achyrachaena mollis G. F. Hrusa, K. van Katwyk 1995-4-22 12143 Colusa Inner North Coast Ranges; Leesville Rd. approx. 4 m. NW of Hwy. 20. Comment
  CHSC27825  Achyrachaena mollis K. D. Whitney 1978-4-8 32 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  RSA424744  Achyrachaena mollis Aaron Liston, M. A. Blumler 1987-4-26 667 -10 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  SD197771  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14242 Colusa Sacramento Valley: along CA-20, 0.2 miles east of the Sutter County line. 9 Comment
  CHSC94419  Acmispon brachycarpus Lowell Ahart 2006-8-22 13217 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  UCD64282  Acmispon brachycarpus Craig D. Thomsen 2000-3-31 2098 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
  UCD66693  Acmispon brachycarpus Craig D. Thomsen 2000-6-23 2376 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  UCR261667  Acmispon brachycarpus Ann Howald 2003-6-9 2367 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3 miles north of Lodoga, north of Last Chance camping area 372 Comment
  UCSB63635  Acmispon brachycarpus Fukuyama, S. 1986-4-5 Colusa Ca 0.3 mi w of jjct of Hwys 20 & 16, S side of Bear Creek, ca 18 mi SW of Williams 321 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
  UCD84430  Acmispon grandiflorus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6045 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 769 Comment
  CHSC100288  Acmispon grandiflorus var. grandiflorus David Isle 1988-4-13 1516 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Trough Springs Ridge on bank edge of 18N01 (M10), SE of junction with 18N07 (M-5). MDMB. 621 Comment
  SD131845  Acmispon grandiflorus var. grandiflorus L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. 762 Comment
  CHSC81265  Acmispon rubriflorus L. P. Janeway; B. Castro 2001-4-25 7026 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Eggman Canyon. 329 Comment
  CHSC112313  Acmispon wrangelianus Lowell Ahart 2013-5-1 18697 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
  CHSC71112  Acmispon wrangelianus Jan Monelo 1989-4-1 13 Colusa Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 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
  UCR261721  Acmispon wrangelianus Ann Howald 2003-5-30 2355 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, Coppermine Road c. 1.2 miles north of intersection with Ruby King Rd., then c. 0.1 mile east on ranch road 397 Comment
  CHSC75739  Actaea rubra Vernon H. Oswald; Lowell Ahart 1999-6-22 9780 Colusa Lily Pond near Upper Letts Lake west of Stonyford. Along the edge of the meadow at the Lily Pond. 1243 Comment
  CAS-BOT-BC107  Adenostegia palmata Roxana Judkins [later Mrs. Ferris q.v.] Stinchfield 1916-6-17 284 Colusa near College City Comment
  CAS-BOT-BC133153  Adenostoma fasciculatum Roxana Stinchfield 1916-6-18 304 Colusa Near College City Comment
  JEPS44792  Adenostoma fasciculatum Alice King June 1906 Colusa 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
  UCD56913  Adiantum jordanii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3516 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 318 Comment
  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
  CDA4025  Aeschynomene rudis G. D. Barbe, Daryl Brown 1990-8-29 4392 Colusa West side of Boggs Road between Dodge and Fonseca Roads; 5.6 km southwest of Princeton. 0 Comment
  UCD14572  Aeschynomene rudis June McCaskill; with Jim Hill 1990-9-5 s.n. Colusa Colusa Co.; near Princeton in a rice field; Comment
  UCD104588  Aeschynomene rudis George Costa; Steven Scardaci 1990-8-28 s.n. Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  UCD104592  Aeschynomene rudis June McCaskill; G. D. Barbe 1990-9-5 4397 Colusa West side of Boggs Road Between Dodge and Fonseca roads; 5.6 km southwest of Princeton. Comment
  UCD14547  Aesculus californica Rob Ickel 1989-5-27 12 Colusa California, Colusa Co.; along Highway 16, 1.5 mi south of junction with Highway 20; 316 Comment
  CHSC48483  Agastache urticifolia Vernon Oswald 1984-7-20 1613 Colusa Near the Lily Pond n of Letts Lake in Mendocino Nat. Forest. 1280 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
  CHSC56745  Agoseris heterophylla Ginger S. Gough 1989-4-1 7 Colusa Ca. 0.48km W of jct of Hwys 20 and 16, S side of Bear Creek, ca. 29km SW of Williams. 322 Comment
  UC2014169  Agoseris heterophylla Ellen Dean, G. Harrington, K. Mawdsley 2007-3-30 3500 Colusa Colusa County: BLM Payne Ranch. On the west side of Hwy. 16. Ca. 2 road miles south of junction of Hwy. 16 and Hwy. 20. Comment
  UCD65647  Agoseris heterophylla Craig D. Thomsen 2000-4-28 2188 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD82475  Agoseris heterophylla Craig Thomsen; G. Harrington 2009-5-12 2853 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  OBI49665  Agoseris heterophylla var. cryptopleura A. Liston, M. Blumler 1987-4-26 667 -2 Colusa Bear Valley, Lodoga Rd, 6.6 mi S of Bartlett Springs jct Comment
  JEPS51468  Agrostemma githago Alice King 1906-1 Colusa Arbuckle near College City Comment
  CHSC117416  Agrostis avenacea B. Castro; Tom Boullion 2008-7-10 1762 Colusa Sacramento Valley. Ca 3 air mi SE of Colusa, on W bank of the Sacramento River near Moon Bend at RM 141.4, just off Moon Bend Rd. 18 Comment
  UCD64033  Agrostis exarata Craig D. Thomsen 2000-6-23 2412 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
  UCD64042  Agrostis exarata Craig D. Thomsen 2000-6-23 2427 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
  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
  UCD66472  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 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
  UCR227338  Aira caryophyllea Craig D. Thomsen 2001-4-24 2476 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, near Colusa Co. milepost 3.0 310 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
  UCD66951  Alisma triviale Gordon Harrington 2008-6-16 s.n. Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Along Brophy Canyon Creek upstream of trail crossing. 457 Comment
  UCD63709  Alisma triviale Craig D. Thomsen 2006-8-17 2711 Colusa BLM Payne Ranch. About 0.25 mile south of intersection of Hwy 16 and Hwy 20. Near confluence of Hamilton Flat and Jackson Canyon drainages, about 10 meters east of Bear Creek, west of Hwy 16. Comment
  CAS-BOT-BC131915  Allium Roger Raiche 1985-3-19 RR 50160 Colusa Colusa-Lake County line, Walker Ridge, 3.4 miles south of north end of Barrel Springs Campground on Walker Ridge Road 1036 Comment
  UCD163213  Allium amplectens Craig D. Thomsen 2000-4-28 2207 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.3 mile west of Hwy 20/16 intersection. 345 Comment
  UCD82515  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2873 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82518  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2875 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  CHSC115627  Allium amplectens David Isle; Terril Wolt 2015-4-8 2146 Colusa Northe Coast Range: N of Fouts Springs; just N of the S fork Stony Creek. W of FS Gate to Bathhouse (Welton Glade) Trailhead ~200-300 ft.. In drainage ditch on S edge rd. (Fouts Springs California: 10S -0529687E, 4356519N). Comment
  SBBG128774  Allium amplectens L. Ahart 2013-5-1 18682 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
  UCD141844  Allium cratericola L. K. Mann; M. D. Mann 1961-4-2 s.n. Colusa Bear Valley. 396 Comment
  JEPS73488  Allium falcifolium L. R. Heckard 1972-7-9 3100 Colusa se slope of East Peak of Snow Mt. East Peak of Snow Mt. 2011 Comment
  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
  POM174570  Allium falcifolium Roxana S. Ferris 1926-4-23 6570 Colusa Dry Creek near Stonyford. Comment
  RSA256672  Allium falcifolium J. L. Hobson 1974-5-4 57 Colusa 0.75 mile from the junction to Indian Valley on Walker Ridge Road. 854 Comment
  SEINET12051857  Allium fimbriatum Unknown 1986-1 60124 Colusa W of Williams, Bear Valley area, Bear Valley Rd, ca .7 mi N of its origin at Rt.20 323 Comment
  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
  UC2014135  Allium fimbriatum subsp. purdyi Michele Lanctot with Plant Biology 102 2007-4-29 2 Colusa Colusa County: Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Bottom of serpentine slope in the middle of the path. Comment
  CAS-BOT-BC135883  Allium fimbriatum subsp. purdyi M. S. Baker 1937-5-17 8657 Colusa Hiway 20, nr. Lake Co. line. Comment
  CHSC27630  Allium fimbriatum var. purdyi Robert A. Schlising 1978-5-13 3231 Colusa Just E of Lake County line, along Hwy 20. Comment
  CHSC32948  Allium fimbriatum var. purdyi Thomas Nelson; Jane Nelson 1978-4-29 3928 Colusa Along Bear Valley Rd. ca. 2 miles from junction with State Route 20. 365 Comment
  POM215800  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa/Lake Co. Line west of Wilbur Springs 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
  UCD141783  Allium fimbriatum var. purdyi L. K. Mann 1958-5-3 s.n. Colusa Colusa - Lake County: California Highway #20 at county line. Comment
  UCD164168  Allium fimbriatum var. purdyi Craig Thomsen 2008-5-31 2761 Colusa Payne Ranch (Bear Creek Ranch) BLM. About 1 mile south of Hwy 20 junction, vicinity of Cowboy Camp. Comment
  UCD57292  Allium fimbriatum var. purdyi Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3663 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. 328 Comment
  HSC66002  Allium serra Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 53 Colusa Leesville Rd. from Leesville to Williams, 3.8 mi. E of Leesville Comment
  JEPS56391  Allium serra W. I. Follette 1935-4-1 Colusa 13.7 mi sw Williams (8.1 mi e of Colusa-Lake county line) Comment
  UCD57665  Allium serra Erica A. Smith; with Plant Biology 102 2007-4-29 3 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central/Eastern part of ranch. Craig Canyon. Along unimproved road, just west of where road crosses Craig Creek. 313 Comment
  CAS-BOT-BC475545  Allium serra Lewis S. Rose 1936-4-27 36181 Colusa 11 miles NW of Rumsey 411 Comment
  POM269061  Allium serra Lyman Benson 1933-4-16 4327 Colusa 5 miles east of Lake County line. Mt. Range: Inner N. Coast; Watershed: N. Fork Cache Creek. 457 Comment
  SEINET3880036  Allium serra D. W. McNeal 1988-3-31 3241 Colusa Dry clay soil on a grassy road bank above Hwy #116, 3.3 mi S of the jct. of Hwy #20.; 0 Comment
  UCD138639  Allium serra C. B. Shah 1960-4-10 11 Colusa Bear Valley, 10 miles northwest of junction of State Highways 16 and 20. 304 Comment
  UCD141808  Allium serra L. K. Mann 1958-5-3 s.n. Colusa 0.2 mi. toward Clear Lake from junction of California Highway #16 and #20. Comment
  UCD141822  Allium serra L. K. Mann; A. Saghir 1963-5-15 s.n. Colusa along road 3.2 miles past junction of Caliornia 16 and 20, toward Rumsey, SW part of county. 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
  UCD84444  Allophyllum gilioides Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6052 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  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
  CHSC86527  Allophyllum gilioides subsp. violaceum B. Castro 2003-3-18 1387 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 228 Comment
  CHSC88518  Allophyllum gilioides subsp. violaceum B. Castro 2003-5-15 1438 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On steep SE-facing slope in opening above dirt rd paralleling a S-trending canyon. 195 Comment
  JEPS73496  Alnus incana subsp. tenuifolia L. R. Heckard 1972-7-10 3112 Colusa Trout Creek Snow Mt. (at crossing of trail to Box Springs (ca 10 mi w of Stonyford)) 1828 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
  CHSC94310  Alnus rhombifolia Lowell Ahart 2006-8-9 13108 Colusa Gravel bar on the north side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 422 Comment
  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
  SEINET10510969  Alopecurus californicus Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles E of Williams. Alkali Plains. Comment
  UCD55965  Alopecurus saccatus G. F. Hrusa; K. van Katwyk 1995-4-22 12142 Colusa Inner North Coast Ranges, along north side of Leesville Rd., approx. 4 m NW of Hwy. 20. 290 Comment
  CHSC84970  Amaranthus californicus Lowell Ahart 2003-10-23 10658 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  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
  CHSC94748  Ambrosia psilostachya Lowell Ahart 2006-9-26 13350 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
  JEPS110533  Ambrosia psilostachya Lowell Ahart 2006-10-31 13518 Colusa About 20 yards northeast of the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA724821  Ambrosia psilostachya L. Ahart 2006-9-29 13350 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 mileseast of Maxwell. 24 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
  UC1191561  Ammannia coccinea Herbert L. Mason 1945-9-19 12716 Colusa 1 mi. above Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Butte Sink, Sacramento R. Comment
  CHSC94478  Ammannia robusta Lowell Ahart 2006-8-9 13142 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford. 347 Comment
  RSA724959  Ammannia robusta L. Ahart 2006-8-9 13142 Colusa north side and just east of the bridge across Stony Creek, just north of Stonyford. 348 Comment
  CHSC90043  Amsinckia intermedia Craig Fleming 1991-4-6 13 Colusa In Salt Canyon, n side of Salt Creek, Hwy 20, 11 mi wsw of Williams. 143 Comment
  RSA0090976  Amsinckia intermedia R. R. Halse 2001-3-22 5944 Colusa Williams; along a vacant lot by 455-4th Street. 18 Comment
  UC1093629  Amsinckia intermedia Francia Chisaki, Gene B. Newcomb 1958-4-1 1102 Colusa on road to Lodoga (6.6 mi n of junction with Hwy 20) Comment
  UCD80900  Amsinckia intermedia Ellen Dean; w/ Destanella Flat Tour 2009-3-28 5300 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 16 and 20. Destanella Flat, just E of the Lake County border, ca. 3.4 road miles west of Hwy 16 along Hwy 20, south side of Hwy 20. 560 Comment
  UCD82372  Amsinckia intermedia Robin McMaster 1973-4-15 346 Colusa 0.5 mi towards Bartlett Springs from Bear Valley Road. Comment
  CHSC81225  Amsinckia lunaris L. P. Janeway; B. Castro 2001-4-18 7024 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Spring. 274 Comment
  CHSC86519  Amsinckia lunaris B. Castro; Beth Hendrickson 2003-3-24 1396 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 323 Comment
  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
  UC762196  Amsinckia lunaris R. F. Hoover 1938-4-23 3204 Colusa grade on Rumsey-Arbuckle Road Comment
  UCD63713  Amsinckia lunaris Craig D. Thomsen 2008-3-30 2722 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, near ridgeline and headwaters of Eula Canyon drainage. 501 Comment
  UCD80820  Amsinckia lunaris Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5276 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. SW-facing slope above Lynch Canyon on east side of canyon. 517 Comment
  RSA0089732  Amsinckia lunaris B. Castro 2003-3-18 1384 -a Colusa Vicinity of Sites (Offstream Storage Investigation: Sites S. Bridge road route), hills N of the Sites-Lodoga Road, and Stone Corral Creek. 198 Comment
  CHSC107984  Amsinckia lycopsoides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1852 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Ca 250 ft SE of large +/- saline/alkaline wetland marsh. 59 Comment
  CHSC82659  Amsinckia lycopsoides Tara Morgan 2002-4-6 15 Colusa This specimen was found along Bear Valley Rd. just off of Highway 20 to the north situated north of Bear Creek. Roadside. 307 Comment
  UC727131  Amsinckia lycopsoides A. A. Heller 1940-5-14 15620 Colusa 4 mi n Maxwell (in a field) Comment
  UCD56909  Amsinckia menziesii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3512 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  HSC72143  Amsinckia retrorsa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9575 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  CHSC78593  Ancistrocarphus filagineus J. Marr; H. West, C. Warren, J. Lacey-Rickert, N. Wight 1998-4-14 Colusa Vicinity of Antelope Valley. 137 Comment
  HSC72168  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9543 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  RSA293116  Ancistrocarphus filagineus J. P. Smith, Thomas W. Nelson, Jane Nelson 1978-4-2 9543 Colusa Bear Valley Road, 1.3 miles from its junction with State Route 20. 366 Comment
  UCD56923  Ancistrocarphus filagineus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3526 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Near headwaters of Craig Canyon. 359 Comment
  CHSC80415  Androsace elongata subsp. acuta C. Warren; G. Kuenster 2000-4-11 Colusa Vicinity of Sites, Huffmaster Rd, and Antelope and Grapevine Creeks, just N of the divide between the two creeks. 411 Comment
  CHSC42571  Angelica tomentosa Vernon Oswald 1984-7-20 1612 Colusa Near the Lily Pond n of Letts Lake in the Mendocino Nat. Forest. 1280 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
  JEPS80201  Anthemis cotula L. R. Heckard and J. Hickman 1980-7-3 5356 Colusa around Summit Springs; Snow Mt. (sw flank) 1548 Comment
  SD22373  Anthemis cotula Richard Neil 1938-6-20 Colusa Grimes 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
  UCD83626  Anthriscus caucalis Adam Clause; with PLB 102 class 2010-5-2 5 Colusa Walker Ridge. Eaton Springs. 40 m south of the main road, on the flat valley floor at the edge of a creek. 709 Comment
  POM99734  Antirrhinum subcordatum Volney Rattan 1884-06 s.n. Colusa Stony Creek Comment
  UCD70222  Antirrhinum vexillocalyculatum D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 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
  CHSC115752  Antirrhinum virga David Isle 2015-6-20 2157 Colusa 10S -0533568E, 4357508N). North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill 200' S of 18N01 in 2012 Mill Fire area chaparral. N aspect, chamise chaparral; 50-80' above Quercus berberidifolia and #156 RIMA GPS. 439 Comment
  UCD64506  Aphanes occidentalis Craig D. Thomsen 2000-3-31 2093 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC101627  Apiastrum angustifolium David W. Isle 2002-4-18 1656 Colusa Mendocino National Forest; N of Fouts Springs, n of Chlorinator Building on road to Bathhouse Trail (Snow Mtn.) N aspect of E drainage in chamise site burned during 8/8/01 Trough Fire and part of Hydromulch Soil Erosion Study Plot. 524 Comment
  CHSC62836  Apiastrum angustifolium Vernon H. Oswald; Lowell Ahart 1994-3-23 6017 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. 505 Comment
  CHSC79441  Apocynum cannabinum B. Castro; L. P. Janeway 2000-5-1 1105 a Colusa Vicinity of Sites, Pence Mtn, and Grapevine Creek. 335 Comment
  JEPS81276  Apocynum cannabinum L. R. Heckard and J. C. Hickman 1982-7-5 5886 Colusa Summit Springs s. side of Snow Mt. (slope below (s. of) area); , Summit Springs 1500 Comment
  UCD66955  Apocynum cannabinum Ellen Dean; Davis Botanical Society 2008-5-31 4999 Colusa west of I-5 at Maxwell, along Goat Mountain Road following Little Stoney Creek, Little Stoney Creek Canyon. 414 Comment
  CAS-BOT-BC392020  Aquilegia eximia G. L. Stebbins 1972-6-25 9000 Colusa Ravine below Black Diamond Glade, 4 miles northwest of Stonyford 411 Comment
  UCD23339  Aquilegia eximia A. M. Shapiro 2003-8-19 s.n. Colusa Little Stony Creek. Partly shaded serpentine riparian habitat. 475 Comment
  UCD66930  Arceuthobium campylopodum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5079 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. In western part of ranch, several hundred feet downslope of ridge trail. Along trail that starts along ridge bordering Thompson Creek headwaters and loops back to ridge trail. Large, dammed stock pond, holding water still, in middle of meadow. Comment
  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
  JEPS81346  Arctostaphylos L. R. Heckard and J. C. Hickman 1982-7-6 5943 Colusa about 1/2 mi ne Summit Springs (e of trail, s side of mt.); Snow Mt. 1645 Comment
  UCD15652  Arctostaphylos canescens Rachelle Raymond 1989-4-8 102 Colusa Bear Valley. 1097 Comment
  SEINET11989661  Arctostaphylos canescens R. A. DeMartile 1982-1 s.n. Colusa 10 mi from Ladoga on road between Ladoga & Goat Mountain lookout 701 Comment
  JEPS73507  Arctostaphylos canescens subsp. canescens L. R. Heckard 1972-7-10 3124 Colusa on trail to Box Spring e Trout Creek crossing (Snow Mt.); , e of Trout Creek crossing on trail to Box Spring 1828 Comment
  RSA96755  Arctostaphylos canescens subsp. canescens P. C. Everett, E. K. Balls, George B. Everett 1954-10-17 20335 Colusa 2 miles SW of Trough Springs on road to Upper Lake from Stonyford. 1037 Comment
  JEPS117095  Arctostaphylos canescens subsp. sonomensis Peter Warner 2010-5-16 153 Colusa Walker Ridge Road, ~18.4 km N of jct. with Hwy. 20, along E (Colusa Co.) side of road, scattered on slopes above Zimory Canyon to the west, Trout Creek to east, and adjacent slopes on both sides of road Comment
  UCD13384  Arctostaphylos glandulosa Charles Martin 1986-5-17 34 Colusa Medocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service rd. 18 NO1 on Forest Service Rd 17 NO2. Comment
  UCD51019  Arctostaphylos glandulosa G. L. Webster 1989-5-6 7697 Colusa Near Border with Lake County; on Walker Ridge; near Cold Spring Mountain. Comment
  CAS-BOT-BC38981  Arctostaphylos malloryi P. C. Everett; E. K. Balls 1954-10-17 20335 Colusa 2 mi. SW of Trough Springs on road to Upper Lake from Stonyford Comment
  UCD67000  Arctostaphylos manzanita Craig D. Thomsen; Gordon Harrington 2008-7-6 2781 -c Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat, along ridge trail above Cache Creek Canyon. 640 Comment
  HSC7627  Arctostaphylos manzanita subsp. elegans Freed W. Hoffman 1948-6-28 2439 Colusa Road between Upper and Lower Letts Valleys 1220 Comment
  CAS-BOT-BC24376  Arctostaphylos manzanita subsp. manzanita Walter Knight; Irja Knight 1964-4-11 814 Colusa Between Lewisville and Ladoga. Comment
  CAS-BOT-BC24379  Arctostaphylos manzanita subsp. manzanita A. A. Heller 1940-2-14 15499 Colusa Three mi. e. of the North Fork of Cache Creek Bridge on State Hwy #20. Comment
  CHSC22676  Arctostaphylos patula Robert A. Schlising; Glenn Keator 1962-1-31 2034 Colusa Coast Ranges. On Goat Mountain. 1097 Comment
  SEINET9328832  Arctostaphylos viscida Unknown 1989-2-11 5821 Colusa Common on serpentine slopes above Bear Creek, on Bear Valley Rd. approx. 1 mi N of Hwy 20. W/ Quercus durata. Comment
  UCD15253  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  JEPS87758  Arctostaphylos viscida subsp. pulchella Vernon H. Oswald and Lowell Ahart 1994-3-23 6011 Colusa s side Little Stony Creek (in section on e side of Frenzel Creek, s of Stonyford); Frenzel Creek Research Natural Area 518 Comment
  SEINET5731548 Image available Arctostaphylos viscida subsp. pulchella Bruce Hartsough 1973-1 17 Colusa 7 mi. N of Hwy 20 on Walker Ridge Rd. 853 Comment
  RSA589937  Arctostaphylos viscida subsp. viscida Michael A. Vincent, Robert Rhode, Karl Vincent 1996-3-30 7301 Colusa Along Brim Rd., 1.9 mi. W juct . Bear Valley Rd. Comment
  POM367485  Arctostaphylos viscida subsp. viscida Phyllis Krieg 1979-4-14 s.n. Colusa [Unspecified] 1067 Comment
  UC1299490  Arenaria congesta var. crassula Freed W. Hoffman 1947-6-20 1608 Colusa Nort Coast Ranges, summit of Goat Mountain Comment
  UC1040776  Aristida ternipes var. hamulosa L. T. Burcham 1955-7-5 317 Colusa 10 mi w Williams 121 Comment
  CAS-BOT-BC400399  Aristolochia californica Roxana S. Ferris 1926-4-22 6308 Colusa Sycamore Slough near Sycamore Comment
  POM163496  Aristolochia californica Roxana S. Ferris 1926-4-22 s.n. Colusa Sycamore Slough near Sycamore Comment
  RSA757048  Aristolochia californica Rudolf Schmid 2010-3-13 2010 -6 Colusa Cache Valley, from sandy bank on west side of Highway 16 at edge of Foothill Woodland, a few kilometers north of county line. 169 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
  CHSC112642  Artemisia douglasiana Lowell Ahart 2013-10-1 19098 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
  CHSC61398  Artemisia douglasiana Vernon H. Oswald 1993-8-16 5809 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, NE corner of Tract 41. 25 Comment
  CHSC94281  Artemisia douglasiana Lowell Ahart 2006-8-9 13100 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  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
  JEPS24499  Artemisia douglasiana J. H. Thomas 1960-8-30 8862 Colusa 2.5 mi nw of Sycamore (on road to Colusa) Comment
  HSC44456  Asclepias cordifolia R. York 1978-4-22 126 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  HSC45677  Asclepias cordifolia Stephen Plant 1978-4-22 215 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS80258  Asclepias fascicularis L. R. Heckard and J. Hickman 1980-9-15 5437 Colusa Summit Springs, n of road Snow Mt., Lake-Colusa County Boundary 1524 Comment
  JEPS95651  Asclepias speciosa Vernon H. Oswald and L. Ahart 1999-6-18 9774 Colusa Fouts Springs Rd. (M10) 9.9 mi west of Stonyford-Elk Creek Rd.: T17N R7W Sect. 7, 2050 ft, chaparral, serpentine substrate. From a colony growing along the edge of a roadside seep. 624 Comment
  CAS-BOT-BC478831  Asparagus officinalis Roxana Stinchfield 1918-7-11 464 Colusa Davis Tule near Sycamore Slough Comment
  RSA74062  Aster sonomensis Milo S. Baker 1946-9-4 11618 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  CAS-BOT-BC478060  Asteraceae Mark A. Elvin; Mark S. Brunell; David Isle 2006-8-3 5035 Colusa Southern Northern Inner Coast Ranges, Snow Mountain, Summit Spring Trail, 1.4 km W of Snow Mtn West summit, 800 m N of Cedar Camp 1988 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
  JEPS120976  Astragalus gambelianus Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18633 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  UC71640  Astragalus gambelianus Miss Alice King 1905-1 Colusa College City Comment
  UC83408  Astragalus gambelianus Katharine Brandegee april 1889 Colusa Colusa Junction Comment
  UCD163837  Astragalus gambelianus Craig D. Thomsen 2001-4-12 2466 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  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
  CHSC26305  Astragalus rattanii var. jepsonianus Pauleen Broyles 1977-4-16 119 Colusa Ca. .5 km w of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 316 Comment
  CHSC29256  Astragalus rattanii var. jepsonianus John Steiner 1977-4-16 46 Colusa Growing in an open field, ca. 0.5 km w of jct. of Hwys 20 and 16, s side of Bear Creek, ca. 30 km sw of Williams. 322 Comment
  CHSC46306  Astragalus rattanii var. jepsonianus Vernon Oswald 1986-5-12 2006 Colusa Brim Rd. (Bartlett Springs Rd.) 1.8 mi w of Bear Valley Rd. 502 Comment
  HSC48165  Astragalus rattanii var. jepsonianus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3929 Colusa Along Bear Valley Rd. 2 mi. from junction with State Route 20 366 Comment
  RSA424724  Astragalus rattanii var. jepsonianus Aaron Liston, M. Blumler 1987-4-26 667 -3 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UC1181547  Astragalus rattanii var. jepsonianus R. F. Hoover 1941-5-2 4986 Colusa on Williams--Clear Lake Highway just e Lake Co. line; Williams--Clear Lake Highway Comment
  UC863114  Astragalus rattanii var. jepsonianus Alice Eastwood, John Thomas Howell 1938-5-16 5634 Colusa Lake--Colusa County line on road to Williams; road to Williams Comment
  UCD163317  Astragalus rattanii var. jepsonianus Craig D. Thomsen 1997-4-20 1914 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  UCD56917  Astragalus rattanii var. jepsonianus Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3520 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. In Craig Canyon. 334 Comment
  UCR212305  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2000-5-11 2291 B Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  RSA475227  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 699 -1 Colusa 3.3 miles N of Stonyford on Elk Creek Road. 300 Comment
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Aug 8 2014
  RSA0003126  Astragalus tener var. ferrisiae Roxana S. Ferris 1926-4-21 6281 Colusa 3 mi W of Colusa.. Comment
  CAS-BOT-BC17401  Athysanus pusillus Roxana S. Ferris 1917-4-14 551 Colusa Foothills 7 miles west of Arbuckle. Arbuckle-Rumsey Road. Comment
  UCD58109  Athysanus pusillus Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3361 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. Grassland area to the SSE of Destanella Flat. 572 Comment
  UCD64044  Athysanus pusillus Craig D. Thomsen 2000-3-8 2036 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC17403  Athysanus pusillus Volney Rattan 1884-1-1 s.n. Colusa Unspecified. Comment
  UCD114250  Athysanus pusillus Kim E. Steiner 1978-4-29 198 Colusa Walker Ridge Rd., 1.5 mi. N of State Hwy 20. 777 Comment
  UCD66944  Atriplex Craig D. Thomsen 2000-5-11 2289 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. 304 Comment
  UCD72509  Atriplex Craig D. Thomsen 2008-3-30 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  JEPS90596  Atriplex depressa Dean W. Taylor 1993-8-31 14069 Colusa dry vernal pool ca 200 mi e North Fork Logan Creek (Logandale 7 1/2' USGS quadrangle); Sacramento Valley, Sacramento National Wildlife Refuge 24 Comment
  CHSC107934  Atriplex fruticulosa B. Castro; L. Janeway 2011-7-9 1895 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; approximately 1 mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. In swale about 300 ft north of large +- alkaline marsh. At edge of swale near star-thistle thicket. 49 Comment
  RSA747234  Atriplex fruticulosa George K. Helmkamp, E. Helmkamp 2008-10-14 14250 Colusa Sacramento Valley: along CA-20, 0.2 mile east of the Sutter County Line 9 Comment
  CAS-BOT-BC168435  Atriplex parishii var. persistens H. M. Hall 1920-7-12 11012 Colusa West of Princeton Comment
  JEPS108755  Atriplex rosea Lowell Ahart 2006-9-26 13346 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  UC72556  Atriplex serenana var. serenana H. P. Chandler 1905-9-14 Colusa Princeton Comment
  CHSC78973  Atriplex triangularis Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9977 Colusa Delevan National Wildlife Refuge. 18 Comment
  UC53770  Avena barbata J. Burtt Davy May 1898 4294 Colusa near Princeton Comment
  UCD65636  Avena barbata Craig D. Thomsen 2000-4-12 2148 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  SEINET3919645  Avena barbata Patricia Shesgreen 1978-4-22 33 Colusa Wilbur Springs Quad. Bear Valley Road, 1.5 miles from its junction with State Route 20.; 0 411 Comment
  UCD66912  Avena fatua Craig D. Thomsen 2008-4-27 s.n. Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and WNW of Cowboy Camp on the west side of Bear Creek. 451 Comment
  CHSC96926  Azolla filiculoides Lowell Ahart 2007-7-7 14260 Colusa On north side of the Gridley Colusa Highway, about 1 1/4 miles east of River Road, about 17 miles west of Gridley. 20 Comment
  HSC87058  Baccharis salicifolia Pat Daly, Rudy Galindo 1988-4-16 53 Colusa 3.7 miles west on Goat Mountain Rd. off of Lodoga-Stonyford Rd. to Digger Pine Campground; Stony Creek, .5 mile from campground 452 Comment
  CAS-BOT-BC100066  Balsamorhiza macrolepis James Jokerst 1985-4-5 2210 Colusa Wilbur Springs Quad. Near Coyote Peak 456 Comment
  UC1585403  Balsamorhiza macrolepis R. Raiche 1989-5-23 90133 Colusa w of, n of Wilber Springs, se end of Walker Ridge, Sulpher Creek Drainage Williams; Sulpher Creek Drainage 610 Comment
  UCD74309  Balsamorhiza macrolepis G. Ledyard Stebbins 1971-6-6 s.n. Colusa Walker Ridge Rd., 1/4 mile S of Bartlett Springs Rd. 701 Comment
  UCD82368  Balsamorhiza macrolepis Robin McMaster 1973-4-15 338 Colusa Bartlett Springs. Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  UCD82586  Barbarea vulgaris Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2731 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1 mi E of Walker Ridge Rd. 609 Comment
  UCD97576  Bassia hyssopifolia Herbert L. Mason 1946-8-6 12958 Colusa On Colusa-Marysville Highway, four miles south of Colusa, west side of Sacramento River. Comment
  UC1563953  Bergia texana Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8869 Colusa SE end of East park Reservoir N of Lodoga Comment
  UC1192266  Bergia texana Herbert L. Mason, Verne Grant 1946-8-6 12967 Colusa Pond 2.7 miles north of Colusa between Sacramento River and Butte Creek Comment
  RSA74341  Bidens frondosa Milo S. Baker 1946-9-4 11612 Colusa Butte Sink, near gate of Colusa Gun Club Comment
  JEPS15272  Boechera breweri subsp. shastaensis Rimo Bacigalupi G. L. Stebbins and Peter Kamb 1950-4-16 3106 Colusa ridge n Red Bridge Camp (between and above the confluence of the N and Middle Forks of Stony Creek, nw Colusa Co., very close to Glenn Co. line); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  JEPS73458  Boechera platysperma L. R. Heckard 1972-7-8 3062 Colusa saddle between East Peak and West Peak; Snow Mt. 1981 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
  JEPS127623  Boehmeria cylindrica B. Castro with Tom Boullion 2009-8-24 1800 G-1 Colusa Ca 8 ai mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. Comment
  CHSC80474  Bolboschoenus glaucus Caroline Warren; Jenny Marr, Heidi West, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek and Logan Ridge. 106 Comment
  CHSC82037  Bolboschoenus glaucus L. P. Janeway 2001-6-13 7172 Colusa Sacramento Valley. Along Norman Road 5.0 km east of Hwy 99W and Hwy I-5. 23 Comment
  RSA0046899  Bolboschoenus glaucus Richard Carter 2006-7-31 17122 Colusa 3.7 mi SSE Colusa, jct. Hwy CA 20 and Hwy CA 45. Comment
  CHSC57146  Bolboschoenus maritimus K. R. Stern 1980-6-1 6641 Colusa Vernal pool, south-central border area of Colusa Wildlife Refuge. 45 Comment
  UCD72536  Bolboschoenus maritimus Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3827 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.25 mile downstream of bridge. 251 Comment
  UCD140021  Bolboschoenus maritimus subsp. paludosus K. Esau; D. Hartmann 1941-7-17 s.n. Colusa near Williams. Comment
  CAS-BOT-BC418409  Boykinia occidentalis Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek 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
  CHSC112031  Briza minor David Isle 1988-5-11 2100 Colusa Moon Glade (E of Trout Ck Trailhead) 1/2 mi W of Fouts Springs; Middle Fork Stony Creek Watershed, Mendocino National Forest. 621 Comment
  HSC45669  Bromus arenarius Stephen Plant 1978-4-22 204 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 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
  UCD57609  Bromus arenarius Beecher Crampton 1958-5-19 4802 Colusa 5.8 miles south of Lodoga. Comment
  UCD57610  Bromus arenarius Beecher Crampton 1958-5-19 4793 Colusa 10.1 miles southeast of Leesville. Comment
  SEINET11695837  Bromus arenarius Unknown 1960-5-26 T.O. 2509 Colusa 10.1 mi SE of Leesville, E of Three Sisters, grown at UC Davis agronomy experimental area Comment
  UCD58523  Bromus diandrus Beecher Crampton 1962-4-17 6215 Colusa Sycamore. Comment
  SEINET3922244  Bromus diandrus S. Bowie, J. Lopez; D. Riess 1994-4-23 171 Colusa Leesville Quadrangle, Walker Ridge (BLM property). Collected along Bear Valley Road in Bear Valley, approx. 2.1 km south of intersection with Brimm Road.; 0 663 Comment
  JEPS75408  Bromus hordeaceus W. L. Jepson 1932-5-8 16289 Colusa Stonyford 365 Comment
  JEPS80197  Bromus hordeaceus L. R. Heckard and J. Hickman 1980-7-3 5351 Colusa 10 mi w of Stonyford (just w of Summit Springs, sw of Snow Mountain) 1548 Comment
  RSA714303  Bromus hordeaceus Daisie Huang 2006-4-16 6041602 Colusa 45 S of Grimes. Roadside below Sacramento River pumping station. 9 Comment
  UCD66447  Bromus japonicus Craig D. Thomsen 2000-5-11 2292 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  UCD66569  Bromus laevipes Craig D. Thomsen 2001-5-24 2531 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC112028  Bromus laevipes David Isle; Doug Johnson 1988-5-11 2089 Colusa Mendocino National Forest. Little Stony Road (Goat Mtn Rd). 426 Comment
  UCD59017  Bromus madritensis Beecher Crampton 1958-5-19 4791 Colusa 10.1 miles southeast of Leesville. Comment
  UCD81893  Bromus madritensis Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5777 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. SW of Roadkill Cafe near stock pond. 429 Comment
  HSC23360  Bromus madritensis subsp. rubens J. D. Dagray 1970-4-4 3 Colusa 10 mi. W of Williams on Hwy. 20 122 Comment
  SEINET3922874  Bromus madritensis subsp. rubens Richard R. Halse 2002-3-21 6130 Colusa Williams; by junction of 5th Street and B Street.; 0 24 Comment
  UCD66914  Bromus madritensis subsp. rubens 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. Just downslope of basin near top of ridge to the northwest of Eula Canyon and southwest of Cowboy Camp on the west side of Bear Creek. 457 Comment
  JEPS80793  Bromus orcuttianus L. R. Heckard and J. C. Hickman 1981-7-30 5763 Colusa se Snow Mountain, going down Trout Creek Trout Creek; Snow Mountain, Trout Creek 1569 Comment
  RSA724142  Bromus rubens R. R. Halse 2002-3-21 6130 Colusa Williams; by junction of 5th Street and B Street. 24 Comment
  SEINET3923292  Bromus rubens Christopher Knopp 1978-4-22 17 Colusa Wilbur Springs Quad. Bear Valley Road 1.5 miles from its junction with State Route 20.; 0 411 Comment
  UCD65632  Bromus tectorum Craig D. Thomsen 2000-4-12 2133 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
  UC1563843  Cacaliopsis nardosmia Barbara Ertter 1989-7-1 8595 Colusa road to Goat Mt. Lookout 2.2 mi s Rt. M-10 (Bear Creek-Fouts Spring Rd) (at head of creek, ca 12 airmiles wsw of Stonyford); S Fork Stony Creek 1500 Comment
  CAS-BOT-BC273300  Cacaliopsis nardosmia J. M. Tucker; John Tothill 1959-5-30 3527 Colusa Road between Goat Mountain Lookout and Upper Letts Valley (ca. 2 1/2 miles, airline, north of the lookout), Goat Mountain 1524 Comment
  RSA0115082  Calandrinia breweri Lowell A. Ahart 2013-5-1 18673 Colusa On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  HSC72159  Calandrinia ciliata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9534 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 Comment
  JEPS52594  Calandrinia ciliata Ruth Johnson 1915-4-6 Colusa College City Comment
  UCD163689  Calandrinia ciliata Craig Thomsen 1999-4-15 1991 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  HSC62784  Calandrinia ciliata Thomas Wood 1979-4-14 111 Colusa Bear Valley Rd., 13 mi. N of Hwy. 20 396 Comment
  SD149215  Calandrinia ciliata Hershkovitz 1991-5-3 Colusa Walker Ridge, along Walker Ridge Road near turn-off to Bear Valley on north end. Comment
  UCD100193  Calandrinia ciliata Mark Hershkovitz 1991-5-3 s.n. Colusa Walker Ridge, along Walker Ridge Rd. nr. Turn-off to Bear Valley on north end; serpentine site. Comment
  SEINET9097491  Calandrinia ciliata var. menziesii 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
  UCD57052  California macrophylla Gordon Harrington; Diana Hickson 2007-4-7 0011 Colusa BLM Payne Ranch, SW of intersection of Hwy 16 and Hwy 20, 3/4 mile west of Roadkill Cafe. Comment
  CHSC60670  Callitriche marginata Vernon H. Oswald 1993-4-14 5261 Colusa W side of O'Hair Rd., just S of Hwy. 20, Colusa National Wildlife Refuge, SW of Colusa. On the bottom of a depression in a field along the road. 18 Comment
  JEPS120899  Calochortus amabilis Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18640 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
  UC725389  Calochortus amabilis A. A. Heller 1940-5-6 15577 Colusa 2 mi w Highway 16 junction with State Highway 20 (on State Highway 20) Comment
  UC843630  Calochortus amabilis Lewis S. Rose 1936-4-27 36196 Colusa 22 mi sw Williams 396 Comment
  UCD56677  Calochortus amabilis Jack Alderson 2007-3-25 13 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 570 Comment
  CAS-BOT-BC492123  Calochortus amabilis A. A. Heller 1940-5-6 15577 Colusa 2 miles west of Junction with Highway #16, on State Highway #20 Comment
  CHSC85971  Calochortus luteus Jenny Marr; Heidi West, Joyce Lacey-Rickert, Caroline Warren 1998-5-8 Colusa Vicinity of Sites and Antelope Valley. 152 Comment
  JEPS61682  Calochortus luteus Alice King May 1906 Colusa College City 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
  HSC103563  Calochortus luteus J. Carey, A. Hong, J. Leffingwell 1995-5-7 88 Colusa 2.25 mi. SE on Leesville-Williams Rd. from its junction with Bear Valley Rd. 396 Comment
  CHSC112206  Calochortus splendens Lowell Ahart 2013-5-1 18683 Colusa Inner North Coast Range. On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC80106  Calochortus splendens L. P. Janeway; Joyce Lacey-Rickert 2000-6-1 6779 Colusa Vicinity of Grapevine Creek, Scotties Canyon, and Rena Canyon. 243 Comment
  RSA0118781  Calochortus splendens Lowell A. Ahart 2013-5-1 18683 Colusa On the north side of the wash, north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 567 Comment
  UC1562598  Calochortus splendens Barbara Ertter 1989-7-1 8600 Colusa ca 12 air mi wsw Stonyford (road to Goat Mt Lookout, 2.2 mi s of Rt M-10 (Bear Creek-Fouts Spring Rd), at head of South Fork Stony Creek, s.w. side of ridge); South Fork Stony Creek 1500 Comment
  UCD82156  Calochortus splendens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CAS-BOT-BC483485  Calochortus splendens Ella D. Cantelow 1957-5-31 s.n. Colusa 4 miles west of Leesville on grade above Bear Valley Comment
  CHSC42778  Calochortus uniflorus Deborah Grobman 1975-5-11 13 Colusa 3.6 miles east of Leesville on Leesville Grade. Comment
  HSC45509  Calochortus uniflorus M. Alcasas 1978-4-23 59 Colusa Bear Valley Rd., 4.7 mi. from Bartlett Springs Rd. 457 Comment
  HSC83384  Calochortus uniflorus Bob Wych 1975-4-20 16 Colusa 8.7 mi. N of Hwy. 20 on Wilbur Springs Rd. Comment
  UC1049544  Calochortus uniflorus Rimo Bacigalupi 1950-4-16 3126 Colusa Bear Creek, along road down middle of Bear Valley, about BM 1326 Bear Valley Comment
  UCD82499  Calochortus uniflorus Craig Thomsen; G. Harrington 2009-5-12 2858 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  SEINET3885343  Calochortus uniflorus Michelle Steven 1979-4-14 33 Colusa Wilbur Springs Quadrangle. Bear Valley Road, 13 miles north of State Route 20.; 0 396 Comment
  SEINET8197763  Calochortus uniflorus M. J. Williams 1967-5-7 1187 Colusa Bear Valley. Comment
  SEINET8197768  Calochortus uniflorus W. Roderick 1967-5-7 s.n. Colusa Bear Valley. 305 Comment
  CAS-BOT-BC270758  Calycadenia pauciflora K. C. 1884-7-1 s.n. Colusa Mountain House Comment
  CHSC78601  Calycadenia pauciflora J. Marr; H. West 1998-5-27 Colusa Vicinity of Sites Peak, Antelope Valley and Antelope Creek. 137 Comment
  HSC94037  Calycadenia pauciflora G. Fred Hrusa 1998-6-19 14595 Colusa Along Little Stony Creek, on Goat Mtn. Rd., ~0.5 km W of intersection with Lodoga-Stonyford Rd. 400 Comment
  RSA255585  Calycadenia pauciflora Gerald D. Carr 1972-6-14 703 Colusa At the Lake County line on Hwy. 20 Comment
  UCD61447  Calycadenia pauciflora Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3892 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1500 ft NW of parking lot. 368 Comment
  UCD66946  Calycadenia pauciflora Ellen Dean; Davis Botanical Society 2008-5-31 4992 Colusa west of I-5 at Maxwell, along Goat Mountain Road, immediately west of the junction with Lodoga-Stonyford Road. 382 Comment
  UCD82487  Calycadenia pauciflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 a Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCR261752  Calycadenia pauciflora Ann Howald 2003-5-29 2351 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  CAS-BOT-BC270746  Calycadenia pauciflora Gerald D. Carr 1972-7-29 720 Colusa 0.3 mile E of Lake County line on Bartlett Springs Road Comment
  CAS-BOT-BC270749  Calycadenia pauciflora Gerald D. Carr 1971-7-29 607 Colusa 5.2 miles N of Stoneyford on road to Fout Springs 609 Comment
  CAS-BOT-BC270752  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa Bear Valley Road, 0.1 mile N of junction with Brim Road (to Bartlett Springs), ca. 2 miles SW of Leesville Comment
  CAS-BOT-BC270754  Calycadenia pauciflora Gerald D. Carr 1971-9-14 652 Colusa 3.6 miles SW of Leesville on Bartlett Springs Road 518 Comment
  RSA255611  Calycadenia pauciflora Gerald D. Carr 1971-7-29 608 Colusa 1 mile south of Stoneyford on road to Lodoga 366 Comment
  RSA788193  Calycadenia pauciflora R. L. Carr 1978-8-20 2152 Colusa Colusa-Lake Co line on Hwy 20. Comment
  UC1876261  Calycadenia pauciflora Gerald D. Carr 1971-7-29 606 Colusa On road to Trout Cr. Trail, 0.5 mi NW of driveway to Fout Spr. Boys Ranch 502 Comment
  UC1876632  Calycadenia pauciflora Gerald D. Carr 1971-9-15 658 Colusa 6.0 mi N of Yolo Co. line on Hwy 16. Comment
  UC1876636  Calycadenia pauciflora Gerald D. Carr 1971-9-14 651 Colusa 2.0 mi SW of Leesville on road to Bartlett Spr. Comment
  UCD129839  Calycadenia pauciflora Gerald D. Carr 1972-7-29 722 Colusa 1.8 miles east of Walker Ridge Road on Deadshot Road. 731 Comment
  UC1543009  Calycanthus occidentalis Donald G. Nelson et. al. 1940-6-9 694 Colusa Happy Creek Camp Stony Creek, Paradise Creek (on Paradise Creek, which empties into middle fork of Stony Creek, nw corner of Colusa County) 731 Comment
  UCD63125  Calycanthus occidentalis Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4955 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 436 Comment
  UC1055951  Calyptridium quadripetalum Helen K. Sharsmith 1953-6-18 4261 Colusa above Fouts Springs (on Letts Valley Road, Mendocino National Forest); Inner North Coast Ranges, Mendocino National Forest 731 Comment
  UCD57719  Calystegia collina subsp. collina Jordan Thompson; 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. North side of Craig Creek on south side of unimproved road. 335 Comment
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Feb 20 2009
  UCD63111  Calystegia collina subsp. collina Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4942 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
  UCR138664  Calystegia collina subsp. collina B. Ellyson, J. Hooke, D. Newman 1996-5-4 38 Colusa Wilbur Springs, Walker Ridge Road. 8.4 mi north of alker Ridge Road and Indian Reservoir Road intersection on Walke Ridge Road; 57 mi east of Hwy 101 on Hwy 20 701 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
  RSA0059884  Calystegia subacaulis Lloyd Simpson 1977-4-24 290 Colusa Along Walker Ridge Road above Barrel Springs Campground. 701 Comment
  UCD138336  Camassia leichtlinii subsp. suksdorfii J. M. Tucker; L. K. Mann 1959-5-30 3531 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. 1219 Comment
  JEPS80384  Camassia quamash subsp. quamash L. R. Heckard and J. Hickman 1981-6-22 5617 Colusa Snow Mountain, Dark Hollow Creek Dark Hollow Creek; Snow Mountain, Dark Hollow Creek 1889 Comment
  HSC83363  Camissonia graciliflora Eugene Tanimoto 1975-4-20 17 Colusa Bear Valley Rd., 8.7 mi. N of intersection with Hwy. 20 Comment
  UCD146729  Camissoniopsis hirtella G. F. Hrusa 1998-6-19 14613 Colusa Inner North Coast Ranges. Above upper Little Stony Creek. Goat Mountain Roud around 1.5 km west of campground. 485 Comment
  CHSC107961  Carduus pycnocephalus B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1848 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.6 mi southeast of Funks Reservoir and 130 ft east of Tehama-Colusa Canal. Ca 0.3 mi NW of large +- saline/alkaline wetland/marsh, next to large transmission-line towers. 54 Comment
  CHSC115615  Carduus pycnocephalus subsp. pycnocephalus David Isle; Jeff Lynch, Terril Wolt 2015-4-18 2153 Colusa Sacramento Valley Foothills: North side of Canyon Creek, just west of road crossing in Cortina Rancheria. 17 miles SE of Williams and 15 miles W of Arbuckle. 10S -056228E, 431874N. GPS taken at lunch spot ~100 years below (E of) road crossing of Canyon Creek. Collection taken ~50 yards above (W of) road crossing. Comment
  CAS-BOT-BC17885  Carex angustata P. T. Zwanck 1964-4-28 s.n. Colusa On levee at water line, ca. 5 miles north of Colusa. Comment
  CDA33019  Carex angustata P. T. Zwanck 1964-4-28 Colusa 5 miles north of Colusa, on levee. 0 Comment
  JEPS75133  Carex athrostachya L. R. Heckard 1972-7-8 3040 Colusa N side Snow Mountain (West Peak) 2011 Comment
  POM163445  Carex barbarae Roxana S. Ferris 1926-4-22 6315 Colusa Near Sycamore. Comment
  CHSC79590  Carex bolanderi L. P. Janeway 2000-5-31 6772 Colusa High North Coast Ranges. At Trough Spring; about 8.9 km southwest of Stonyford. 1049 Comment
  RSA523880  Carex bolanderi Barbara Ertter 1989-7-1 8607 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  UC1563913  Carex fracta Barbara Ertter 1989-7-1 8610 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
  JEPS75122  Carex hoodii L. R. Heckard 1972-7-10 3114 Colusa Trout Creek crossing of trail to Box Spring; Snow Mt., Trout Creek 1828 Comment
  SEINET7563262 Image available Carex klamathensis Unknown 1999-7-5 6497 Colusa At Bear Wallow Spring, on north side of Lovelady Ridge about 0.5 mi northeast of Pacific Point. Hough Springs quad. 1045 Comment
  JEPS75124  Carex lenticularis var. impressa L. R. Heckard 1972-7-8 3059 Colusa upper reaches of Dark Hollow Creek in saddle between East Peak of Snow Mt. and West Peak of Snow Mt.; Dark Hollow Creek 1981 Comment
  CHSC92669  Carex pachystachya D. Isle 2005-9-14 1173 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. Meadow west of Angel Spring, Snow Mountain Wilderness. 10S 0522348E 4358185N = Angel Springs. Comment
  UCD61461  Carex praegracilis Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3907 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1 mile SW of parking lot. 390 Comment
  RSA262496  Carex praegracilis Sam Olusuyi 1967-4-29 35 Colusa 9 miles north of junction of Wilbur Springs Road and State Highway 20, Bear Valley. 396 Comment
  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
  JEPS80863  Carex serratodens L. R. Heckard and J. C. Hickman 1981-7-30 5745 Colusa Trout Creek trail, se slope of Snow Mt. Snow Mt., Trout Creek trail 1661 Comment
  UCD63115  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4946 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 398 Comment
  UCD82720  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  JEPS80885  Carex subfusca L. R. Heckard and J. C. Hickman 1980-9-16 5451 Colusa first meadow along trail from Frog Pond (e of West Peak); Snow Mt. 1981 Comment
  CDA12181  Castilleja applegatei subsp. martinii G. F. Hrusa 1993-5-2 10863 Colusa Frenzel Creek Research Natural Area; Point of ridge above mouth of Frenzel Creek, tributary of Little Stony Creek. S. side of creek. Comment
  CHSC88871  Castilleja applegatei subsp. martinii Christine Hantelman 2000-4-1 46 Colusa At side of Bear Valley Road. 365 Comment
  HSC72113  Castilleja applegatei subsp. martinii J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-2 9557 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  JEPS94198  Castilleja applegatei subsp. martinii Vernon Oswald and Lowell Ahart 1998-5-7 8995 Colusa Bartlett Springs Rd. 1.6 mi. w. of Bear Valley Rd. 487 Comment
  UCD163329  Castilleja applegatei subsp. martinii Craig D. Thomsen 2009-5-3 2797 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD97120  Castilleja applegatei subsp. martinii Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6903 Colusa Along Brim Rd on east slope of Walker Ridge (Brim Rd becomes Bartlett Springs Rd). 438 Comment
  JEPS81324  Castilleja applegatei subsp. pinetorum L. R. Heckard and J. C. Hickman 1982-7-6 5939 Colusa slope 1/2 mi NE of Summit Springs (E of trail); Snow Mountain, S side 1645 Comment
  HSC47735  Castilleja attenuata Thomas W. Nelson, Jane P. Nelson 1978-4-29 3940 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  UCD83624  Castilleja attenuata Adam Clause; with PLB 102 class 2010-5-2 3 Colusa Walker Ridge. Eaton Springs.15 meters north of the main road, on the flat valley floor. 709 Comment
  UCD122327  Castilleja attenuata Alpaslan Ongun 1961-4-16 38 Colusa South of wooden bridge; in Bear Valley, ca. 8 miles north of State Highway 20. 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
  CHSC27558  Castilleja exserta W. K. Cheechov 1978-4-9 4 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CHSC86864  Castilleja exserta B. Castro 2003-3-25 1402 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 182 Comment
  UCD122410  Castilleja exserta Clinton C. Shock 1980-5-3 66 Colusa Bear Valley, about 12 miles northwest of Highway 20. 384 Comment
  UCD40887  Castilleja exserta R. Rhode 1984-4-21 s.n. Colusa 10 miles north of intersections of highways 16 and 20 in Bear Valley. 426 Comment
  CHSC115373  Castilleja exserta subsp. exserta Lowell Ahart 2015-4-10 20026 Colusa Normal size plants, on dry grassy soil. 407 Comment
  CHSC59611  Castilleja exserta subsp. exserta Carole Pauls 1975-4-20 5 Colusa Bear Valley Road, 8.7 miles north of State Highway 20. Comment
  CHSC89874  Castilleja exserta subsp. exserta B. Castro; S. Innecken 2001-3-26 1218 Colusa Vicinity of Sites, in rolling hills near Sulphur Gap, among unnamed tributaries to Lurline Creek, in heavily grazed annual grassland E of blue oak savanna. On top of small knoll. 91 Comment
  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
  CHSC110845  Castilleja foliolosa David Isle; Rhonda Isle 1989-4-29 2000 Colusa Stony Creek Watershed. Just N of 18N01 (Fouts Springs Rd.), ~2 miles W of Jct. w/Co. Rd. 306. (Just E of entrance to Brother Moore's Home). 382 Comment
  CHSC114943  Castilleja foliolosa Lowell Ahart 2015-4-10 20014 Colusa On the northside of Brim Road, about 2 miles west of the intersection of Bear Valley Road and Brim Road, about 17 miles (air) west of Williams. Chaparral. 500 Comment
  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
  UCR225396  Castilleja foliolosa Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5092 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat 648 Comment
  HSC97523  Castilleja foliolosa Maria-Elena Heizen 2001-4-21 25 Colusa Walker Ridge 671 Comment
  HSC99291  Castilleja foliolosa J. Carey, A. Hong, J. Leffingwell 1995-4-1 25 Colusa Brim Rd., 1.6 mi. W of junction with Bear Valley Rd. 488 Comment
  CHSC33156  Castilleja miniata J. D. Jokerst; Dave Isle 1980-6-27 919 Colusa Banks of Frenzel Creek. Frenzel Creek Botanical Area ca 1.0 mi S of Stoney Cr. Comment
  JEPS121787  Castilleja miniata subsp. miniata David Isle 2013-8-23 2049 Colusa COLUSA County, CA. W bankSalt Ck, ~ 150' NE of Dannis Dr Bridge on Isle Property. Comment
  UC1238982  Castilleja minor subsp. spiralis Freed W. Hoffman 1947-6-19 1663 Colusa Cook's Spring; North Coast Ranges Comment
  UCD166311  Castilleja rubicundula subsp. lithospermoides Jack Major 1962-4-28 808 Colusa At entrance to Bear Valley. (Exact location unknown. Coordinates estimated by label maker.) 381 Comment
  CHSC56783  Castilleja rubicundula subsp. rubicundula Peggy Brennan 1980-4-19 107 Colusa Ca 0.3 mi west of junction of Hwy 20 and Hwy 16; south side of Bear Creek, ca 18 mi southwest of Williams. 321 Comment
  JEPS44112  Castilleja rubicundula subsp. rubicundula Barrie Stanfield 1966-4-16 27 Colusa 5 mi n Wilbur Springs turnoff (Bear Valley bottomlands); Bear Valley Comment
  JEPS74818  Castilleja rubicundula subsp. rubicundula L. R. Heckard, T. I. Chuang and R. Bacigalupi 1975-5-8 4026 Colusa 6 mi n (by road) Wilbur Springs junction; Bear Valley 365 Comment
  RSA182037  Castilleja rubicundula subsp. rubicundula Annetta Carter, Louise Kellogg 1953-6-20 3239 Colusa Road to Leesville, 6 miles north of Wilbur Springs Junction 400 Comment
  UC584134  Castilleja rubicundula subsp. rubicundula J. Clausen 1935-5-20 1018 Colusa ca 27 mi w Williams (past the Wilbur Springs road, along Bear Creek); Bear Creek Comment
  UCD56927  Caulanthus flavescens Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3530 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Saddle between Craig and Thompson Canyons. 394 Comment
  UCD114215  Caulanthus flavescens J. M. Tucker 1958-3-7 3364 Colusa State Highway 16, Cache Creek Canyon, 0.1 mile north of Yolo-Colusa County line. Comment
  CDA12246  Ceanothus cuneatus G. F. Hrusa 1989-2-7 5808 Colusa Inner North Coast Ranges; Leesville Road between Bear Valley & Williams. 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
  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
  UCD170330  Ceanothus integerrimus D. O. Burge 2016-11-3 2189 Colusa Walker Ridge, E of Indian Valley Reservoir, roadside on Bartlett Springs Road. 860 Comment
  CAS-BOT-BC83779  Ceanothus jepsonii D. O. Burge; V. Church 2007-12-28 972 b Colusa Mendocino National Forest, roadside on Goat Mountain Road 430 Comment
  CHSC79559  Ceanothus jepsonii var. albiflorus L. P. Janeway 2000-5-31 6775 Colusa Inner North Coast Ranges. On top of Hornet Nest Ridge, between Hornet Nest Spring and Hornet Nest Hill; about 6.4 km southwest of Stonyford. 884 Comment
  UCD72391  Ceanothus oliganthus var. sorediatus Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5117 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Southwestern edge of ranch above Cache Creek Canyon along ridge trail. 548 Comment
  UC1299512  Ceanothus palmeri Freed W. Hoffman 1947-6-19 1655 Colusa Cook's Springs Cook's Springs (western Colusa County) Comment
  CHSC86117  Centaurea melitensis Jenny Marr; Caroline Warren 1998-5-4 Colusa Vicinity of Sites, Stone Corral Creek, and Antelope Valley. 106 Comment
  IRVC29846  Centaurea solstitialis Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4993 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  UCD57443  Centaurea solstitialis Gina Darin; with Plant Biology 102 2007-4-29 2 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Thompson Canyon. Along trail, north side of Thompson Creek. 374 Comment
  UCR206392  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14758 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC284462  Centaurea solstitialis Roxana Stinchfield 1916-7-12 474 Colusa Street - College City Comment
  NY444420  Centaurea solstitialis R. J. Stinchfield 1916-7-12 474 Colusa Street- College City Comment
  UCD64030  Centaurium tenuiflorum Craig D. Thomsen 2000-6-23 2408 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, Colusa Co. milepost 2.63. 304 Comment
  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
  JEPS68349  Centromadia fitchii L. R. Heckard with R. Bacigalupi and B. Doren 1971-9-9 2789 Colusa on Ladoga rd about 3 mi s Stonyford 335 Comment
  CAS-BOT-BC281221  Centromadia fitchii Volney Rattan 1877-6-26 s.n. Colusa Sulphur Creek Comment
  UCD61474  Centromadia parryi subsp. parryi Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3920 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Just west of parking lot on west side of Bear Creek. 312 Comment
  UCD63776  Centromadia parryi subsp. parryi Craig D. Thomsen 2008-5-31 2757 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Cowboy Camp area, west side of Hwy 16, 1 mile south of Hwy 20. In meadow, west of public viewing area between Bear Creek and hillslopes to the west. 279 Comment
  JEPS38150  Centromadia pungens subsp. pungens W. L. Jepson 1934-5-3 16600 Colusa n of Colusa (Stegeman Station) Comment
  CAS-BOT-BC279207  Centromadia pungens subsp. pungens A. A. Heller 1916-6-9 12391 Colusa Along the state highway near Colusa Comment
  CAS-BOT-BC279212  Centromadia pungens subsp. pungens David D. Keck 1933-5-30 2402 Colusa 1.8 miles west of Colusa on road to Williams Comment
  RSA46869  Cerastium arvense Doris K. Kildale 1927-04 3245 Colusa Stony Ford. Comment
  SEINET11587890  Cercis canadensis var. texensis Unknown 2009-3-11 14378 Colusa Williams Comment
  HSC66011  Cercis occidentalis Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 46 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  UCR37606  Cercis occidentalis C. Houseman, M. A. Strull, L. Linstedt 1984-4-29 14 Colusa Bear Valley Rd., 2 mi north of Hwy 20 366 Comment
  CHSC1542  Cercocarpus betuloides E. Gabel 1935-5-10 Colusa Stonyford. 335 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
  UCD66533  Cercocarpus betuloides Craig D. Thomsen 2000-6-23 2388 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
  UCD70292  Cercocarpus betuloides var. betuloides D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 450 Comment
  JEPS81415  Chaenactis douglasii var. douglasii L. R. Heckard and J. C. Hickman 1982-7-9 6023 Colusa near summit of, Lookout Goat Mt. (Colusa-Lake Counties boundary) Comment
  UCD159334  Chaenactis glabriuscula D. S. Park; E. Dean 2010-6-5 118 Colusa Walker ridge, Cold Spring Mt. Exposed serpentine outcrop. 1032 Comment
  UCD57825  Chaenactis glabriuscula Gordon Harrington 2007-4-17 35 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 526 Comment
  UCR53771  Chaenactis glabriuscula Aaron Liston, M. A. Blumler 1987-4-26 667 -1 Colusa Bear Valley, Lodoga Rd, 6.6 mi south of Bartlett Springs and Lodoga Rd junction Comment
  CHSC70964  Chaenactis glabriuscula var. heterocarpha Vernon Oswald; Lowell Ahart 1998-5-7 9011 Colusa Bartlett Springs Rd. 2.8 mi west of Bear Valley Rd., 0.1 mi east of Sawtelle Valley and Grapevine Flat roads. Roadside banks. 633 Comment
  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
  CAS-BOT-BC284538  Chaenactis glabriuscula var. heterocarpha A. A. Heller 1940-5-6 15580 Colusa A few yards east of the Lake County line 232 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
  CHSC77333  Chamaesyce serpillifolia subsp. serpillifolia Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  UC1415295  Cheilanthes gracillima Dale E. Johnson and J. E. Eckenwalder 1974-6-2 127 Colusa ridge connecting E and W Peaks Snow Mt 2150 Comment
  CDA1337  Chenopodium album L. Ahart 2004-10-4 11430 Colusa East side of Leesville Road, about 4.7 miles by road southeast of the intersection of Bear Valley Road, Leesville Ladoga Road and Leesville Road, northeast of Bear Valley. Comment
  CHSC94517  Chenopodium album Lowell Ahart 2006-8-22 13221 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA724893  Chenopodium album L. Ahart 2006-8-22 13221 -A Colusa south side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  RSA718051  Chenopodium botrys L. Ahart 2006-8-9 13098 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  RSA35284  Chenopodium botrys Milo S. Baker 1941-7-26 10135 Colusa Stony Creek at bridge north of Stonyford, ca. 1 mile. 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
  UCR212300  Chenopodium californicum Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4685 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Along west side of Bear Creek, opposite Cowboy Canyon 312 Comment
  CHSC32207  Chenopodium hians James Jokerst 1980-8-7 1065 Colusa North Coast Range. Near Snow Mountain. Comment
  SEINET11696150  Chloris gayana Unknown 1961-7-20 5932 Colusa 2 mi S of Grimes Comment
  SEINET4565689  Chloris virgata M. J. Williams 1981-9-2 81- 162 -1 Colusa Near an almond orchard on Wisconsin Avenue, south of Arbuckle Comment
  CHSC77630  Chlorogalum pomeridianum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 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
  CHSC80410  Chorizanthe membranacea Caroline Warren; Jenny Marr 1998-5-4 Colusa Vicinity of Sites and Stone Corral Creek. 91 Comment
  HSC44467  Chorizanthe membranacea R. York 1978-4-22 135 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UC638667  Chorizanthe membranacea Ethel Crum 1938-5-7 2015 Colusa 4.2 mi n Rumsey (Comanche Hills); Inner North Coast Range, Comanche Hills 254 Comment
  CDA1159  Cirsium cymosum T. C. Fuller 1958-6-16 1848 Colusa Hillside above Hwy. 20; 2 mi. W/ Cache Creek Bridge. 0 Comment
  JEPS80872  Cirsium cymosum var. cymosum L. R. Heckard and J. C. Hickman 1980-7-1 5292 Colusa above Summit Springs (just above trail entrance to roadless area, Colusa-Lake County boundary); Snow Mt. 1645 Comment
  JEPS81831  Cirsium cymosum var. cymosum L. R. Heckard 1969-5-28 2230 Colusa just below Candy Bucket Springs (on Stoneyford-Fouts Spring road) 670 Comment
  JEPS82545  Cirsium cymosum var. cymosum L. R. Heckard 1983-7-27 6116 Colusa about 1/4 mi w Summit Springs (s side of mt.); Snow Mt. 1500 Comment
  CDA1191  Cirsium douglasii var. breweri G. D. Barbe, Daryl Brown 1982-7-2 3892 Colusa Lower Letts Lake, Mill Valley Campground. Comment
  JEPS75715  Cirsium vulgare L. R. Heckard 1974-9-9 3841 Colusa just se Foutch Camp; Snow Mt. 1920 Comment
  UC71781  Citrullus colocynthis var. lanatus H. P. Chandler Oct. 1905 Colusa Princeton Comment
  UC762214  Clarkia affinis R. F. Hoover 1938-4-24 3231 Colusa below Sites; Stone Corral Canyon Comment
  UCD72458  Clarkia affinis Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3792 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Near north end of bridge, west side of creek. 281 Comment
  CDA37986  Clarkia affinis T. C. Fuller 1958-5-28 s.n. Colusa Highway 20, 2 miles west of junction with Highway 16. 0 Comment
  CAS-BOT-BC164146  Clarkia concinna David D. Keck 1933-5-30 2401 Colusa 1 mile east of Lake County line, west of Wilbur Springs Comment
  CHSC1095  Clarkia concinna subsp. concinna V. Holt 1935-5-12 Colusa Stonyford. 365 Comment
  UC1234600  Clarkia concinna subsp. concinna Peter H. Raven 1962-5-31 17909 Colusa 2.5 mi e Lake County line (State Highway 20) 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
  UCD104545  Clarkia gracilis K. Esau 1934-5-5 s.n. Colusa West of Williams, Tahoe-Ukiah Highway. Comment
  CAS-BOT-BC164528  Clarkia gracilis subsp. albicaulis Richard A. DeMartile 1983-6-15 107 Colusa Bartlett Springs Road north of Baldy Mountain Comment
  LA47307  Clarkia gracilis subsp. albicaulis Francia Chisaki; Helen Sharsmith 1959-5-27 1339 Colusa about 0.25 mi. E of Cooks Spring Comment
  UC1212149  Clarkia gracilis subsp. albicaulis Francia Chisaki, Helen K. Sharsmith 1959-5-27 1339 Colusa about 1/4 mi e Cooks Spring (near Cooks Creek); Inner North Coast Ranges Comment
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Nov 19 2007
  CHSC48626  Clarkia gracilis subsp. gracilis Vernon Oswald 1984-5-2 1163 Colusa Sites-Lodoga Rd. 9.5 mi w of Sites. On a road cut. 533 Comment
  CHSC79533  Clarkia gracilis subsp. gracilis B. Castro; L. P. Janeway 2000-5-2 1113 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 231 Comment
  CHSC89611  Clarkia gracilis subsp. gracilis B. Castro; Aric Lester, Shirley Innecken 2004-4-12 1445 Colusa Vicinity of Antelope Valley, Huffmaster Road, and headwaters of Lurline Creek. Near bottom of secluded E-W trending side-canyon. 176 Comment
  JEPS81291  Clarkia gracilis subsp. gracilis L. R. Heckard and J. C. Hickman 1982-7-5 5903 Colusa slope below and s Summit Springs (s side of mountain); Snow Mt. 1500 Comment
  JEPS122458  Clarkia gracilis subsp. sonomensis David Isle with F. Thomas Griggs 1979-5-23 2072 Colusa Mendocino National Forest. Goat Mtn. Road about 0.6+ mile W of junction w/ Lodoga-Stonyford Road Comment
  CHSC88596  Clarkia gracilis subsp. tracyi L. P. Janeway 2001-6-6 7114 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  UCD63104  Clarkia gracilis subsp. tracyi Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4935 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 348 Comment
  UCD70216  Clarkia gracilis subsp. tracyi D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  CHSC79779  Clarkia modesta L. P. Janeway; B. Castro 2000-5-4 6702 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 265 Comment
  UCD82462  Clarkia purpurea subsp. quadrivulnera Craig Thomsen; G. Harrington 2009-5-12 2840 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  SBBG122897  Clarkia rhomboidea B. Ertter 1989-7-1 8597 Colusa rd to Goat Mtn lookout, 2.2 mi S of Bear Crk-Fouts Spring Rd, head of S Fk of Stony Crk 1500 Comment
  CHSC91163  Clarkia unguiculata D. Isle 1995-6-7 1063 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. Bear Valley Rd. 2.6 miles NW of Hwy. 20/Hwy. 16 junction + 1.4 miles SE of Wilbur Springs Junction. N. edge of Bear Valley Rd. Comment
  CDA11391  Claytonia exigua G. F. Hrusa, K. van Katwyk 1995-4-22 12111 Colusa Inner North Coast Ranges; Approximately 5 m. N of intersection of Walker Ridge Road and Highway 20. Comment
  CAS-BOT-BC439113  Claytonia exigua subsp. exigua James Jokerst 1985-4-5 2207 Colusa Near Coyote Peak. 456 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
  CHSC69690  Claytonia exigua subsp. exigua Vernon Oswald 1984-5-2 1172 Colusa Mendocino Nat. Forest, Fouts Spring Rd. (M10; 18n01) 11.9 mi w of Stonyford. Growing in gravel on a road cut. 868 Comment
  JEPS86625  Claytonia exigua subsp. exigua L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6705 Colusa 0.5 km w Summit Springs (sw flank of Snow Mountain, Colusa-Lake County line); Snow Mountain 1500 Comment
  UC1056274  Claytonia exigua subsp. exigua Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3186 Colusa just w Bear Valley (slope just w of base of the grade to Indian Valley (Bartlett Mt. Road)); Inner North Coast Ranges Comment
  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
  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
  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
  CHSC72461  Claytonia parviflora subsp. parviflora L. P. Janeway; David Isle 1998-7-3 5708 Colusa Along Pacific Ridge Road (16N06) 0.5 mi east of road to Spanish Ridge and Hough Springs; about 50 ft below ridge top on north-facing slope. 1051 Comment
  CHSC91018  Claytonia parviflora subsp. parviflora D. Isle 2002-4-18 299 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. N of Chlorinator bldg., Rd. to Bath House Trail. Comment
  HSC45739  Claytonia parviflora subsp. parviflora Sheila Logan 1978-4-22 55 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  JEPS97385  Claytonia parviflora subsp. parviflora Vernon H. Oswald and L. Ahart 1994-4-6 6055 Colusa T17N R6W NW1/4 Sec. 31, 1520 ft, Chaparral. Goat Mtn. Rd. 0.1 mi NE of Digger Pine Flat, S of Stonyford 463 Comment
  UCD65634  Claytonia perfoliata Craig D. Thomsen 2000-4-12 2137 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way, on south side of Hwy 20, ca. 0.25 mile west of Hwy 20/16 instersection, near Colusa Co. milepost 3.00. 310 Comment
  JEPS86631  Claytonia perfoliata L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6691 Colusa parking area for trail to Snow Mountain Peaks 1625 Comment
  UC1051737  Claytonia saxosa Helen K. Sharsmith 1953-6-20 4292 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National Forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  UCD146599  Claytonia saxosa G. F. Hrusa 1998-6-19 14622 Colusa North Coast Ranges. Summit of Goat Mountain. 1740 Comment
  CHSC81292  Clematis lasiantha L. P. Janeway; B. Castro 2001-4-26 7027 Colusa Vicinity of Grapevine Creek, Sites-Lodoga Road, and Scotties Canyon. 286 Comment
  CHSC94323  Clematis ligusticifolia Lowell Ahart 2006-8-9 13094 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CHSC27553  Collinsia grandiflora Scott E. Patton 1978-4-9 8 Colusa Ca. 0.3 m w of jct of Hwys. 20 and 16, s side of Bear Creek, ca. 18 m sw of Williams. 321 Comment
  CHSC57516  Collinsia grandiflora Lance E. Neuman 1987-4-4 5 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  UC1238969  Collinsia greenei Freed W. Hoffman 1948-6-28 2536 Colusa e side Black Diamond Mtn (near Glenn-Colusa county line); North Coast Ranges, Black Diamond Mtn 838 Comment
  UCD66690  Collinsia greenei Craig D. Thomsen 2000-5-11 2321 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  CHSC1731  Collinsia heterophylla V. Holt 1946-4-18 Colusa Cashe Creek. Comment
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Mar 2 2015
  HSC45513  Collinsia heterophylla M. Alcasas 1978-4-22 49 Colusa Bear Valley Rd. 2 mi. from Hwy. 20 419 Comment
  UC1613286  Collinsia heterophylla Charles M. Belshaw Apr 1937 2884 Colusa vicinity of Cook's Spring (Inner North Coast Range, Devil's Ridge); Inner North Coast Range, Devil's Ridge 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
  JEPS86640  Collinsia rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-18 6682 Colusa sw flank Snow Mtn. (trail from Summit Springs); Colusa-Lake County Line, Snow Mtn. 1590 Comment
  HSC31614  Collinsia sparsiflora Maralyn O'Meara, Gary S. Lester 1974-5-4 344 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  UCD162990  Collinsia sparsiflora Craig D. Thomsen 2000-3-8 2035 Colusa Bear Creek Botanical Management Area. Roadside shoulder of Hwy 20 (south side), about 0.5 mile west of Hwy 20/16 intersection. 345 Comment
  UCD56670  Collinsia sparsiflora Jack Alderson 2007-3-25 6 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 559 Comment
  RSA0016802  Collinsia sparsiflora Aaron Liston, M. Blumler 1987-4-26 667 -4 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  CHSC70908  Collinsia sparsiflora var. arvensis Vernon Oswald; Lowell Ahart 1998-4-21 8946 Colusa Stonyford-Lodga Rd. 4.2 mi south of Stonyford. 384 Comment
  CHSC77468  Collinsia sparsiflora var. arvensis Vernon H. Oswald 2000-3-29 9905 Colusa Hwy. 20 600 ft west of Bear Creek, 0.25 mi west of Hwy. 16. 323 Comment
  JEPS6657  Collinsia sparsiflora var. arvensis A. A. Heller 1937-4-24 15352 Colusa 15 m w Williams (Hwy 20) Comment
  UCD58120  Collinsia sparsiflora var. arvensis Ellen Dean; PLB 102 Class 2007-4-29 3716 Colusa Payne Ranch. West of Hwy. 16. Ca. 2 road miles S of junction of Hwy. 20 and Hwy. 16. Through Craig Canyon. 304 Comment
  UC638654  Collinsia sparsiflora var. collina Ethel Crum 1938-5-8 2029 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  CHSC48647  Collomia diversifolia Vernon Oswald 1986-5-12 2011 Colusa Brim Rd. (Bartlett Springs Rd.) 2.1 mi w of Bear Valley Rd. On a roadcut. 487 Comment
  CHSC70989  Collomia diversifolia Vernon Oswald; Lowell Ahart 1998-5-7 9006 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. At roadside. 524 Comment
  UC1051697  Collomia diversifolia Helen K. Sharsmith 1953-6-18 4260 Colusa on Letts Valley road above Fouts Springs; Inner North Coast Ranges, Mendocino National Forest 731 Comment
  CHSC64135  Collomia tinctoria David Isle 1992-8-3 Colusa Snow Mountain. Just west of the helispot. Comment
  RSA113933  Collomia tinctoria H. K. Sharsmith 1953-7-1 4402 Colusa Linger Longer Camp, Goat Mountain, Mendocino National Forest 1585 Comment
Read comments
Jun 30 2012
  NY643135  Convolvulus arvensis R. J. Stinchfield 1916-7-8 401 Colusa Truck garden Stinchfield Ranch - Sycamore Slough. Comment
  UCR201548  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14266 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 8.4 miles north of Colusa 17 Comment
  UCR205139  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14243 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  RSA0084707  Cordylanthus palmatus Ellen Cypher 2004-9-9 2004 -018 Colusa Delevan National Wildlife Refuge, Tract 33, CNDDB EO# 20 17 Comment
  CHSC89300  Cordylanthus pilosus G. F. Hrusa; Dmitri Geltman 1999-8-18 15248 Colusa North Coast Ranges. Dedar Camp-Goat Mtn. Rd. Along roadside. 792 Comment
  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
  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
  JEPS14919  Cordylanthus pringlei Rimo Bacigalupi with G. T. Robbins, L. T. Dempster, and L. R. Heckard 1956-7-26 5748 Colusa 1/2 mi above Fir-Root Spring Public Camp (at summit of ridge forming Colusa-Lake Co. line, on Colusa side, e of head of Long Ridge, region about 7 mi s of Snow Mountain) 1402 Comment
  RSA505428  Cordylanthus pringlei R. C. Bacigalupi, G. Thomas Robbins, L. T. Dempster, L. R. Heckard 1956-7-26 5748 Colusa At summit of ridge forming Colusa-Lake County line, on Colusa County side, east of head of Long Ridge and 0.5 mile about Fir-root Spring Public Camp. Region about 7 miles south of Snow Mountain. 1402 Comment
  UCD123114  Cordylanthus pringlei A. M. Shapiro 1994-8-16 s.n. Colusa Letts Valley Road, Canyon of Stony Creek. 1432 Comment
  UCD123116  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  UCD123117  Cordylanthus pringlei Craig Thomsen; Art Shapiro 2004-9-16 s.n. Colusa along Cool Springs Road. Comment
  SBBG50832  Cornus glabrata J. K. Clark 1966-5-8 23 Colusa Lodoga to Stonyford Rd, 2.5 mi NW of Lodoga 320 Comment
  UC1776781  Cornus glabrata G. F. Hrusa 1989-5-7 6086 Colusa North Coast Ranges; Road to Cedar Mtn., along Little Stony Creek, approx. 2.5 miles above intersection with Stonyford-Lodoga Rd. Shaded area beneath Populus fremontii 450 Comment
  CHSC101073  Cotula coronopifolia David W. Isle 2006-5-12 1628 Colusa In pre-chiseled rice field 4+ miles NE of Maxwell on W Delevan Hunting Club property farmed by W. Dirks and J. Barrett. 30 Comment
  CHSC107950  Cotula coronopifolia B. Castro; T. Boullion 2011-4-20 1833 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 700 ft northeast of Tehama-Colusa Canal. At north edge of large +- saline/alkaline wetland/marsh, at outer, wet edges of bald patches of bare pale soil. 49 Comment
  CHSC107965  Cotula coronopifolia B. Castro; L. Janeway 2011-4-27 1863 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; aproximately 1 mi southeast of Funks Reservoir and 800 ft northeast of Tehama-Colusa Canal. Approximate center of large +- alkaline marsh. 49 Comment
  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
  SD225728  Cotula coronopifolia Carol Witham, Jennifer Buck 2001-4-30 158 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001 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
  CAS-BOT-BC190086  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa Near Butte Creek. Butte Lodgd Outing Club, three miles above Colusa. Comment
  CDA16109  Crypsis schoenoides G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15244 Colusa North Coast Ranges; Along Leesville Rd., +/- 1 mi S of Lodoga. 320 Comment
  CHSC29760  Crypsis schoenoides K. R. Stern 1980-6-30 6651 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC77404  Crypsis schoenoides Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 Comment
  JEPS104250  Crypsis schoenoides Lowell Ahart 2003-10-23 10675 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
  JEPS110434  Crypsis schoenoides Lowell Ahart 2006-8-9 13116 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD59931  Crypsis schoenoides Beecher Crampton 1958-6-27 4987 Colusa 3.5 miles south of Colusa. Comment
  SEINET4344589 Image available Crypsis schoenoides Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8872 Colusa SE end of East Park Reservoir N of Lodoga. 366 Comment
  POM313168  Crypsis vaginiflora H. L. Mason 1945-7-11 12643 Colusa Near Butte creek; Butte Lodge Outing Club, 3 miles above Colusa. Comment
  UC1131372  Crypsis vaginiflora H. S. Yates 1936-8-14 6131 Colusa 3 mi s Colusa; Colusa Quadrangle 15 Comment
  UCD59983  Crypsis vaginiflora H. L. Mason 1945-7-11 12643 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. Comment
  UCD59987  Crypsis vaginiflora Freed W. Hoffman 1944-7-13 1966 Colusa North Coast Ranges. Bear Creek at junction of Sulphur Creek near Sulphur Springs. Comment
  UCD66867  Crypsis vaginiflora Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5070 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  UCD66926  Crypsis vaginiflora Craig D. Thomsen; G. Harrington 2008-7-6 2785 Colusa BLM Payne Ranch. Lands to the SW of the jct of Hwys 20 and 16. Western side of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond. 609 Comment
  CDA11398  Cryptantha dissita G. F. Hrusa, K. van Katwyk 1995-4-22 12118 Colusa Inner North Coast Ranges; Walker Ridge Road, approx. 6 m. S of intersection with Bartlett Springs Rd. Comment
  CAS-BOT-BC218808  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Creek canyon n. of Highway 20 (near Wilbur Springs), on barren crumbled shale Comment
  SBBG40520  Cryptantha excavata R. F. Hoover 1968-5-27 11099 Colusa Bear Crk cyn N of Hwy 20 (near Wilbur Springs) Comment
  CHSC79095  Cryptantha flaccida B. Castro; C. Warren 2000-4-3 1048 Colusa Vicinity of Antelope Valley, Sites-Lodoga Rd, and Grapevine Ck. 179 Comment
  JEPS80196  Cryptantha flaccida L. R. Heckard and J. Hickman 1980-7-3 5350 Colusa ca 10 mi w Stonyford (just w of Summit Springs sw Snow Mt.); Snow Mt. 1548 Comment
  UC1053453  Cryptantha flaccida Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3168 Colusa 8 mi nw Maxwell (along road to Sites, through first hills on extreme w edge of the Sacramento Valley); Sacramento Valley Comment
  UCD58117  Cryptantha flaccida Ellen Dean; PLB 102 Class 2007-4-29 3712 Colusa Payne Ranch. Lands just west of Hwy. 16. About 2 road miles south of junction of Hwy. 20 and Hwy. 16. 308 Comment
  HSC3611  Cryptantha hispidula Leo Koch 1940-4-29 936 Colusa Near Lake and Colusa county line along Hwy. 20, Williams Hwy. Comment
  UC1731393  Cryptantha hispidula Dean W. Taylor 1998-6-23 16704 Colusa Walker Ridge North Coast Ranges (along access road) 929 Comment
  UC857088  Cryptantha hispidula Alice Eastwood and John Thomas Howell 1938-5-16 5632 Colusa Lake-Colusa county on road to Williams 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
  JEPS67655  Cryptantha intermedia W. L. Jepson 1932-5-8 16291 Colusa n of Stonyford 365 Comment
  SDSU19615  Cryptantha intermedia Michael G. Simpson, Sean Ryan 2010-6-21 3366 Colusa Mendocino National Forest. Forest road 16N03 (to Goat Mtn.), ca. 0.2 miles south of junction with 16N18, 1.1 miles line-of-sight northwest of Goat Mountain peak. 1735 Comment
  UC1177887  Cryptantha intermedia Peter M. Ray 1950-4-16 1716 Colusa jct of North Fork and Big Stony Creek (on n side of canyon) 548 Comment
  UC1212064  Cryptantha intermedia Ethel Crum 1938-5-8 2027 Colusa 3 mi n Leesville; Inner North Coast Range Comment
  UC857152  Cryptantha intermedia Alice Eastwood and John Thomas Howell 1938-5-16 5629 Colusa Lake-Colusa county line on road to Williams Comment
  UC971695  Cryptantha intermedia Leo Koch 1940-4-29 936 b Colusa near Lake and Colusa County (along Highway 20; Williams Highway) Comment
  SBBG29133  Cryptantha intermedia L. Constance 1939-5-14 2489 Colusa 0.5 mi E of Mill Crk Ranger Station 548 Comment
  HSC48168  Cryptantha intermedia var. hendersonii Thomas W. Nelson, Jane P. Nelson 1978-4-29 3932 Colusa Along Bear Valley Rd., 2 mi. from the junction with State Route 20. 366 Comment
  SDSU20616  Cryptantha intermedia var. intermedia Ronald B. Kelley 2008-5-6 1540 Colusa On north side of Bear Valley Road in Bear Valley, 5.8 miles south of Brim Road junction. 387 Comment
  UC638663  Cryptantha microstachys Ethel Crum 1938-5-7 2019 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 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
  UCD84446  Cryptantha muricata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6054 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  CHSC47984  Cryptantha torreyana Vernon Oswald 1986-6-30 2177 Colusa Northwest side of Lily Pond near Letts Lake. Roadway. 1188 Comment
  JEPS80034  Cryptantha torreyana L. R. Heckard 1974-9-10 3900 A Colusa top of East Peak Snow Mt., East Peak 2148 Comment
  SEINET8731274 Image available Cryptantha torreyana Helen K. Sharsmith 1953-1 4282 Colusa Near Trough Springs on Trough Springs Ridge; clearing in Sugar Pine-Douglas Fir forest, Mendocino National Forest. 975 Comment
  UCD110847  Cupressus macnabiana Christopher Mallek 2008-1 FC- 1 Colusa Frenzel Creek. 654 Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  CAS-BOT-BC80807  Cupressus sargentii Hugh Leech 1971-10-9 s.n. Colusa [Cook's] Cooks Springs Comment
  CHSC44829  Cupressus sargentii David Isle 1978-5-16 Colusa Frenzel Creek Research Area, about 10 mi SW of Stonyford, on Goat Mountain Road. Comment
  JEPS75861  Cuscuta californica L. R. Heckard 1974-9-10 3888 Colusa e of East Peak (along upper reaches of Dark Hollow Creek); Snow Mt., Dark Hollow Creek 2011 Comment
  UCD126262  Cuscuta californica Osama A. Al-Menoufi; Keith Glenn 1982-6-7 s.n. Colusa near Williams. Comment
  SBBG115554  Cuscuta californica var. californica B. Crampton 1961-7-20 5935 Colusa 4 mi SE of Grimes, along Knight's Landing Rd 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
  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
  RSA313623  Cycladenia humilis Brandegee 1892-6-23 s.n. Colusa Snow Mountain Comment
  SEINET3157202  Cycladenia humilis T. S. Brandegee 1890-6-23 sn Colusa Snow Mountain Comment
  JEPS15571  Cycladenia humilis var. humilis G. Thomas Robbins with L. R. Heckard 1956-7-25 3711 Colusa s. flank of Snow Mt. East (at lower edge of cirque between Snow Mt. West and Snow Mt. East, slope above Dark Hollow Creek (tributary of Middle Fork Stony Creek)) 1981 Comment
  CDA36301  Cycloloma atriplicifolium Ed Finley Oct 1986 Colusa North of Colusa, along Sacramento River. 0 Comment
  UCD60063  Cynodon dactylon Beecher Crampton 1958-6-26 4975 Colusa 5.5 miles south of College City, along Grieve road. Comment
  UCD60095  Cynodon dactylon Kathryn Johnson 1966-5-14 51 Colusa 14 miles east of Lodoga on road to Maxwell. Comment
  UCD60101  Cynodon dactylon Dorman Sumner 1958-5-27 s. n. Colusa 6.5 miles south of College City, Howard Johnson Ranch. Comment
  UCD56936  Cynoglossum grande Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3538 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UCD61465  Cynosurus echinatus Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3911 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1.5 miles SW of parking lot in Eula Canyon. 310 Comment
  UC837462  Cyperus acuminatus Roxana Stinchfield 1916-7-11 465 Colusa Davis Tule near Sycamore Slough Comment
  CAS-BOT-BC114782  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles N of Colusa between Sacramento River and Butte Creek. Comment
  UC1100541  Cyperus difformis Malcolm A. Nobs and S. Galen Smith 1949-9-9 1877 Colusa 3 mi. w. Williams Comment
  UCD54036  Cyperus eragrostis K. Esau; D. Hartmenn 1941-7-17 s.n. Colusa near Williams. 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
  JEPS110331  Cyperus erythrorhizos Lowell Ahart 2006-9-26 13356 Colusa Along the deep ditch, south side of the Delevan National Wildlife Refuge, north side of Maxwell road, about 3 miles west of Colusa Princeton Road, about 5 1/2 miles east of Maxwell 24 Comment
  JEPS120707  Cyperus erythrorhizos Lowell Ahart 2013-10-1 19078 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
  UC1099935  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-9-5 13115 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100516  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-8-7 12984 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink 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
  RSA523855  Cyperus erythrorhizos W. L. Jepson 1929-10-1 15342 Colusa Maxwell 26 Comment
  RSA91938  Damasonium californicum Beecher Crampton 1953-4-29 1148 Colusa 7 miles E of Maxwell. Comment
  CDA16113  Datisca glomerata G. F. Hrusa, Dmitri Geltman (LE) 1999-8-18 15240 Colusa North Coast Ranges; Leesville Rd. On E side of main ridge from Bear Valley. 213 Comment
  RSA724964  Datisca glomerata L. Ahart 2006-8-9 13146 Colusa North side and just east of the bridge across Stony Creek, just north of Stonyford 348 Comment
  UCD126517  Datura ferox T. G. Willis 1925-9-24 Colusa Colusa. Comment
  RSA724817  Datura wrightii L. Ahart 2006-8-22 13205 Colusa At the intersection of Sites Lodoga Road and a dirt road to Elk Creek, about 1.5 miles (air) east of East Park Reservoir, about 4.5 miles (air) northeast of Lodoga. 546 Comment
  UCD63774  Daucus pusillus Craig D. Thomsen 2008-5-23 2754 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. About 1 mile south of Hwy 20 (south of Destanella Flat) and 2.5 miles west of Hwy 16. 420 Comment
  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
  JEPS81406  Delphinium antoninum L. R. Heckard and J. C. Hickman 1982-7-9 6013 Colusa about 100 m w lookout (Colusa-Lake Co. boundary); Goat Mt 1859 Comment
  HSC86893  Delphinium hesperium Pat Daly, Rudy Galindo 1988-4-17 58 Colusa 5.2 mi. S of Bear Valley Rd. 390 Comment
  UCD95852  Delphinium hesperium June McCaskill 1962-5-2 652 Colusa On road along Bear Creek from State Highway 20 north to Leesville, 7 miles north of Wilbur Springs turnoff. Comment
  CDA11416  Delphinium hesperium subsp. pallescens G. F. Hrusa, K. van Katwyk 1995-4-22 12137 Colusa Inner North Coast Ranges; Small colony on low slope in partial shade of Quercus douglasii on S side of Leesville Rd. approx. 3 m. N of Hwy 20, flowers light purplish to near white. Rather tall-to 3 ft., most individuals just beginning bloom. Comment
  CDA15469  Delphinium hesperium subsp. pallescens G. F. Hrusa, T. D. Wilfred 1998-6-19 14606 Colusa North Coast Ranges; Scattered perennial on steep slope within chaparral above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of of campground. Non-serpentine. Flowers blue, other plants nearby range to light blue and pinkish. Crown attachment firm. 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
  CHSC86969  Delphinium hesperium subsp. pallescens B. Castro 2003-5-14 1434 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. 158 Comment
  UC1607881  Delphinium hesperium subsp. pallescens C. G. Nast 1936-4-17 144 Colusa Williams to Lake county Highway Comment
  JEPS6254  Delphinium hesperium subsp. pallescens W. L. Jepson 1932-5-7 16261 Colusa Venado (2 mi. above, in a little valley), Southwestern Colusa County 304 Comment
  UC766123  Delphinium hesperium subsp. pallescens R. F. Hoover 1938-4-24 3225 Colusa ridge between Venata and Leesville Comment
  HSC41862  Delphinium nudicaule K. Irwin 1977-4-24 302 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  CAS-BOT-BC8058  Delphinium nuttallianum Roxana S. Ferris 1917-4-14 550 Colusa Foothills, 7 mi. west of Arbuckle along Arbuckle-Rumsey Road Comment
  CAS-BOT-BC33189  Delphinium uliginosum M. K. Curran 1884-7-1 s.n. Colusa Epperson's Comment
  SEINET12091405  Delphinium uliginosum R. A. DeMartile 1983-1 109 Colusa Bartlett Springs Road N of Baldy Mt 762 Comment
  CHSC46049  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Ca. 200 yards west of road; on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  UCR146707  Delphinium variegatum Roman Gankin 1958-5-4 s.n. Colusa Bear Valley 400 Comment
  RSA158040  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa Colusa County: road along Beaar Creek from Hwy 20 N to Leesville, 3.6 miles N of Wilbur Springs turnoff Comment
  SEINET5338169  Delphinium variegatum M. J. Williams 1967-5-7 s.n. Colusa Bear Valley. 396 Comment
  UCD15287  Delphinium variegatum Claire Warshaw 1985-4-13 7 Colusa along Bear Valley Road, 8 miles norhtwest from intersection with highway 20; 390 Comment
  UCD96729  Delphinium variegatum June McCaskill 1962-5-2 651 Colusa 200 yards west of road, on road along Bear Creek from State Highway 20 north to Leesville, 3.6 miles north of Wilbur Springs turnoff. Comment
  CHSC1465  Delphinium variegatum subsp. variegatum 1946-4-18 Colusa Cache Creek. 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-BC16956  Delphinium variegatum subsp. variegatum Wayne Roderick 1967-5-7 s.n. Colusa Bear Valley 304 Comment
  HSC96981  Delphinium variegatum subsp. variegatum Jenny Marr, Heidi West, Joyce Lacey, Caroline Warren, Natalie Wight 1998-4-14 Colusa Near Grapevine Creek, Antelope Valley, Sites-Lodoga Rd. 137 Comment
  CAS-BOT-BC192667  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 549 Colusa 4 miles East of Williams Comment
  CAS-BOT-BC192671  Deschampsia danthonioides A. A. Heller 1902-5-1 5435 Colusa Near College City Comment
  CHSC107972  Deschampsia danthonioides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1855 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. Towards north end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/marsh, in drying vernapool bottom. 49 Comment
  UCD66526  Deschampsia danthonioides Craig D. Thomsen 2000-4-12 2326 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. 340 Comment
  SEINET10524178  Deschampsia danthonioides Roxana S. Ferris 1917-4-12 Ferris 549 Colusa 4 miles east of Williams. Alkali plains. 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
  UCD164163  Descurainia sophia Craig Thomsen 2008-3-20 2719 Colusa Payne Ranch (Bear Creek Ranch) BLM. Hwy 16 about 0.25 mile south of junction with Hwy 20. Comment
  CHSC48439  Dicentra chrysantha Vernon Oswald 1984-7-20 1609 Colusa M10, 11.3 mi w of Rd. 306 at Stonyford. 792 Comment
  SEINET10533987  Dichelostemma capitatum Roxana S. Ferris 1917-4-14 Ferris 600 Colusa in gulch. 5 miles west of Arbuckle-Rumsey Road. 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
  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
  UCD139269  Dichelostemma volubile K. Esau 1934-5-5 s.n. Colusa Tahoe-Ukiah Highway, west of Williams. Comment
  UCD84561  Dichelostemma volubile Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6086 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  UC1100289  Digitaria ischaemum Herbert L. Mason 1945-9-19 12722 a Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink spillway Comment
  CHSC94391  Digitaria sanguinalis Lowell Ahart 2006-8-22 13226 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  CAS-BOT-BC152170  Diplacus bolanderi V. Rattan 1884-6-1 s.n. Colusa Unspecified Comment
  CAS-BOT-BC153322  Diplacus layneae Herbert L. Mason 1952-6-19 14305 Colusa Black Diamond Ridge, Mendocino National Forest 609 Comment
  SEINET199008  Diplacus layneae Helen K. Sharsmith 1953-1 4290 Colusa Mendocino Nat For; In metamorphic rubble of forest clearing, 5 mi beyond Trough Springs on rd to Goat Mt. 1280 Comment
  SEINET8235421  Diplacus layneae Unknown 1959-5-27 1338 Colusa by Cooks Creek; about 1/4 mile east of Cooks Spring. Comment
  CHSC29758  Diplacus tricolor K. R. Stern 1980-5-5 6626 Colusa South central border area of Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC208651  Distichlis spicata A. A. Heller 1902-5-19 5569 Colusa Near Colusa. Comment
  CHSC107945  Distichlis spicata B. Castro; L. Janeway 2011-5-19 1882 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca 1 mi southeast of Funks Reservoir and 600 ft northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In south half of the marsh, especially its outer edges, and up into swale to the north. 49 Comment
  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
  CDA32963  Distichlis spicata Doug Barbe & Phyllis Hiatt 1979-5-2 Colusa Williams; waste ground by Shell station. 0 Comment
  UCR70827  Dodecatheon hendersonii Victor Duran 1933-4-2 3378 Colusa Stonyford 305 Comment
  UCD118842  Dodecatheon hendersonii subsp. hendersonii Victor Duran 1933-4-3 3378 Colusa Stonyford. 304 Comment
  UC1001281  Downingia insignis W. L. Jepson 1934-5-3 16597 Colusa City College Comment
  RSA60889  Downingia insignis Frank W. Gould 1938-4-23 295 Colusa Roadside between Arbuckle and Williams. Comment
  CHSC27583  Downingia pulchella Timothy Spira; Robert Schlising 1978-5-13 3248 Colusa Bear Valley, about 5 mi S of Leesville, on Bear Valley (=Wilbur Springs) Road. Comment
  POM59020  Downingia pulchella A. A. Heller, H. E. Brown 1902-5-1 s.n. Colusa Near College City. Comment
  UCD81238  Dudleya cymosa Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5402 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Edge of Bear Creek, near mouth of canyon located to the south of Brophy Canyon. 223 Comment
  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
  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
  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
  CAS-BOT-BC197058  Echinochloa crus-galli Milo S. Baker 1944-7-18 10871 Colusa A few mi. W. of Williams along Highway to Lake Co. Comment
  SEINET241777 Image available Echinochloa crus-galli Beecher Crampton 1965-7-8 7448 Colusa 4.5 miles south of Grimes Comment
  UCD34847  Echinochloa crus-galli Beecher Crampton 1963-9-9 6893 Colusa 1/4 mile E of Cortena. Comment
  UCD60930  Echinochloa crus-galli P. B. Kennedy 1928-9-15 Colusa Cortena. Rice station. Comment
  UCD61169  Echinochloa oryzoides Hursh 1919-11-12 X 3342 Colusa Williams. Comment
  UCD61170  Echinochloa oryzoides P. B. Kennedy 1925-9-18 Colusa Rice Station, Cortena. Comment
  UCD61177  Echinochloa oryzoides P. B. Kennedy 30-31 May 1922 Colusa Colusa. Comment
  CAS-BOT-BC445569  Echinodorus berteroi Gordon H. True 1974-11-15 7840 Colusa On Delevan Road just west of Four Mile Road, 4 mi. east of Delevan 27 Comment
  UCD137955  Echinodorus berteroi June McCaskill; W. A. Harvey 1954-8-9 368 Colusa west side of pete Bartnett's house, Tule Road, around 7 miles east of Arbuckle. Comment
  UC1192122  Eclipta prostrata Herbert L. Mason and Verne Grant 1946-8-7 12985 Colusa 8 mi n Colusa; Butte Sink Comment
  UC1192126  Eclipta prostrata Herbert L. Mason 1945-9-19 12725 Colusa below causeway over Butte Sink spillway, e bank of Sacramento River, 1 mi n Colusa; Sacramento River, Butte Sink spillway Comment
  UCD63619  Ehrendorferia chrysantha Craig D. Thomsen 2000-6-12 2369 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Between Cache Creek Ridge and Brophy Canyon, about 5 miles south of Hwy 20 and 1.5 miles west of Hwy 16. 321 Comment
  UCD95151  Ehrendorferia chrysantha K. Esau 1934-5-5 s.n. Colusa above Williams, Tahoe-Ukiah Highway. Comment
  UC1100601  Eleocharis engelmannii Malcolm A. Nobs, S. Galen Smith 1949-7-18 1006 Colusa 2.5 mi W of Williams Comment
  CAS-BOT-BC113364  Eleocharis engelmannii Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-7-18 1006 Colusa West of Williams, 2.5 miles. Comment
  CAS-BOT-BC112754  Eleocharis macrostachya Herbert L. Mason; Verne Grant 1946-8-6 12956 -B Colusa Pond on Colusa/Marysville Hwy, 4 mi S of Colusa, W side of Sacramento River. Comment
  CHSC84216  Eleocharis parishii Lowell Ahart 2003-7-14 10382 Colusa Along a stream, field on the south side of Highway 20, about 2 miles southwest of the intersection of Highway 20 and Bear Valley Road, about 21 miles (by road) southwest of Williams. 520 Comment
  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
  JEPS80832  Eleocharis suksdorfiana L. R. Heckard and J. C. Hickman 1981-8-1 5804 Colusa between new Fouth Camp and High Rock (s. side of Snow Mt.); Snow Mt. 1905 Comment
  JEPS80393  Elymus L. R. Heckard and J. Hickman 1981-6-22 5626 Colusa below (s of) Dark Hollow Trail; Snow Mt. 1981 Comment
  UCD61526  Elymus elymoides Helen K. Sharsmith 1953-6-19 4267 Colusa Near confluence of North and Middle forks of Stoney Creek, Red Bridge Camp, Mendocino National Forest. 548 Comment
  UCD61690  Elymus elymoides subsp. californicus D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. 450 Comment
  JEPS75852  Elymus elymoides subsp. elymoides L. R. Heckard 1974-9-10 3896 Colusa East Peak Snow Mt. (e slope) 2103 Comment
  CHSC94631  Elymus glaucus subsp. glaucus Lowell Ahart 2006-6-11 12671 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford. 613 Comment
  JEPS80218  Elymus multisetus L. R. Heckard and J. Hickman 1980-7-3 5374 Colusa slope above Summit Springs (sw slope of mt.); Snow Mt. 1554 Comment
  UCD62670  Elymus trachycaulus subsp. trachycaulus G. L. Stebbins Jr. 1939-7-11 2957 Colusa 3 miles west of Leesville. 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
  CHSC110861  Emmenanthe penduliflora David Isle; Rhonda Isle 2013-5-19 2041 Colusa 0.1 mi W of Maxwell Grade Summit; burned NW asp. S of Sites Lodoga Road. 7/12 Sites Fire Area. 10S 0546355E 4355688N. 548 Comment
  UC1051707  Emmenanthe penduliflora Helen K. Sharsmith 1953-7-1 4406 Colusa Trough Springs Ridge; Inner North Coast Ranges, Mendocino National Forest 609 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
  UCD105385  Epilobium brachycarpum P. B. Kennedy 30-31 May 1922 s.n. Colusa Near Colusa. Comment
  UCD55446  Epilobium brachycarpum Ellen Dean; Gordon Harrington 2006-10-6 3271 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  JEPS80757  Epilobium brachycarpum L. R. Heckard and J. C. Hickman 1981-7-29 5724 Colusa road above Summit Springs (s side of mt., Colusa-Lake Co. boundary); Snow Mt. 1569 Comment
  UCD105289  Epilobium brachycarpum C. F. Dunshee 1922-7-28 22 Colusa Cortina. Comment
  UCD66863  Epilobium campestre Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5066 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Northwest corner of ranch. Along ridge trail on the border of Lake and Colusa counties. East side of trail around stock pond. 609 Comment
  JEPS75755  Epilobium ciliatum subsp. glandulosum L. R. Heckard and R. Bacigalupi 1976-9-6 4437 Colusa trail crossing Snow Mt., Trout Creek 1828 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
  JEPS110108  Epilobium densiflorum Lowell Ahart 2006-8-9 13140 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS120710  Epilobium densiflorum Lowell Ahart 2013-10-1 19102 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
  JEPS75736  Epilobium densiflorum L. R. Heckard 1974-9-9 3878 Colusa about 1/4 mi e Foutch Camp 1828 Comment
  CHSC79783  Epilobium foliosum L. P. Janeway; B. Castro 2000-5-4 6705 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  CHSC80234  Epilobium foliosum B. Castro; L. P. Janeway 2000-5-2 1118 Colusa Vicinity of Sites-Lodoga Rd, and Grapevine Creek. On W-facing slope by dirt road just E of creek. 249 Comment
  CHSC112253  Epilobium minutum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18649 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  HSC72213  Epilobium minutum Thomas W. Nelson, Jane P. Nelson 1980-6-24 5877 Colusa Along road to Snow Mtn. trail head at Summit Springs 1585 Comment
  JEPS74980  Epilobium nivium L. R. Heckard 1974-9-11 3948 Colusa rocky promontory overlooking Fouts Springs (se corner of mt.); Snow Mt. 1889 Comment
  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
  CHSC112010  Epipactis gigantea David Isle 1977-4-23 2079 Colusa Mendocino National Forest. Goat Mtn. Rd. ~1.5 miles W of jct. w/ Lodoga-Stonyford Rd (Co. Rd. 306). On N edge Little Stony Creek. Comment
  CAS-BOT-BC58020  Equisetum Roxana S. Ferris 1926-4-21 6312 Colusa Near Sycamore. Comment
  UCD70303  Equisetum laevigatum D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. Serpentine riparian alder forests (Alnus rhombifolia) growing on alluvial sands at Stoney Creek. 420 Comment
  CHSC113050  Eragrostis hypnoides Lowell Ahart 2013-10-1 19077 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  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
  CHSC115633  Eragrostis hypnoides David Isle; Terril Wolt 2014-9-24 2139 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
  JEPS110406  Eragrostis pectinacea var. pectinacea Lowell Ahart 2006-8-22 13206 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCR261664  Eriastrum abramsii Ann Howald 2003-5-8 2333 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 380 Comment
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Dec 15 2016
  CAS-BOT-BC515192  Eriastrum tracyi Volney Rattan 1881-6-1 s.n. Colusa Stony Creek. Coast Mountains north of San Francisco Bay Comment
  JEPS123252  Eriastrum tracyi David Gowen 2004-6-23 130 Colusa West of Stonyford near Fouts Springs. Toward the western edge of Davis Flat. Comment
  IRVC29632  Ericameria cuneata Mark A. Elvin, Mark S. Brunell, David Isle 2006-8-3 5026 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
  CHSC62837  Ericameria linearifolia Vernon H. Oswald; Lowell Ahart 1994-3-23 6019 Colusa Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford. Along road. 505 Comment
  UCD163349  Ericameria linearifolia Craig D. Thomsen 2000-5-12 2329 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  CAS-BOT-BC298294  Ericameria nauseosa var. speciosa Peter H. Raven 1959-9-11 14416 Colusa 0.5 mile S of Snow Mt 1920 Comment
  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
  JEPS75830  Ericameria nauseosa var. speciosa L. R. Heckard 1974-9-11 3947 Colusa rocky promontory overlooking Fouts Springs, se corner of Snow Mt. Snow Mt., Fouts Springs 1889 Comment
  UCD84637  Erigeron greenei G. Harrington 2009-7-21 86 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  CHSC92605  Erigeron inornatus var. inornatus D. Isle 2005-8-2 1159 Colusa Mendocino National Forest--North Coast Ranges. Middle Fork Stony Creek Watershed. West end of Board Camp Ridge. 1554 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
  JEPS73515  Erigeron petrophilus var. petrophilus L. R. Heckard 1972-7-10 3133 Colusa overlooking and 3 mi nw Fouts Springs (se corner of Snow Mt.); Snow Mt. 1828 Comment
  CAS-BOT-BC216001  Eriodictyon californicum Roxana S. Ferris 1917-4-14 597 Colusa 5 miles west of Arbuckle, Arbuckle-Rumsey 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
  CHSC112641  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 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
  CHSC77614  Eriogonum dasyanthemum Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 167 Comment
  JEPS110262  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa On the east side of an off road trail (Trail 30), about 100 yards south of Fouts Road, about 5 miles (by road) west of Stonyford 613 Comment
  JEPS120713  Eriogonum dasyanthemum Lowell Ahart 2013-10-1 19066 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
  JEPS57027  Eriogonum dasyanthemum W. L. Jepson 1920-5-23 8962 Colusa grade above Venado Comment
  RSA216788  Eriogonum dasyanthemum Robert F. Hoover 1968-5-27 11100 Colusa Bear Creek canyon N. of Highway 20 (near Wilbur Springs) Comment
  SEINET8043934 Image available Eriogonum dasyanthemum Ann Howald 2003-1 2353 Colusa Inner North Coast Ranges: Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground. 378 Comment
  UC1552830  Eriogonum dasyanthemum Frederica Bowcutt 1985-5-5 509 Colusa ca. 1 mi nw Wilbur Springs Comment
  UCD55455  Eriogonum dasyanthemum Ellen Dean; Gordon Harrington 2006-10-6 3279 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 374 Comment
  UCR228281  Eriogonum dasyanthemum Ellen Dean, Gordon Harrington, Craig D. Thomsen, S. Harrison 2008-5-18 4952 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 20 402 Comment
  UCR261730  Eriogonum dasyanthemum Ann Howald 2003-5-29 2353 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.7 miles north of Lodoga, near Chisolm Cove Group Campground 378 Comment
  UCR263625  Eriogonum dasyanthemum Lowell Ahart 2006-6-11 12680 Colusa east side of an off road trail (Trail 30), c. 100 yards south of Fouts Road, c. 5 road miles west of Stonyford 613 Comment
  CAS-BOT-BC242578  Eriogonum dasyanthemum A. J. Bassinger 1920-10-29 s.n. Colusa Sand Creek Comment
  CAS-BOT-BC242581  Eriogonum dasyanthemum James L. Reveal 1975-7-27 3902 Colusa Along the Leesville Road west of Williams, on a steep road grade about 3.2 miles southeast of Leesville, and about 1 mile below the summit of the grade Comment
  RSA0081456  Eriogonum dasyanthemum James L. Reveal 1988-6-2 6986 Colusa Walker Ridge Road along Lake County line, 4.1 miles south of the Bartlett Springs Road and 3.2 miles south of the northern turnoff to Barrel Springs Campground, about 12.7 miles north of California Highway 20. 991 Comment
  UC178340  Eriogonum dasyanthemum Katharine Brandegee Colusa Bear Valley to Leesville Comment
  UCSB1430  Eriogonum gracile Keator, Glenn 1958-6-16 Colusa just east of Colusa-Lake County line; on road from Lower Lake to Sacramento Valley Comment
  UCR88380  Eriogonum luteolum var. luteolum Arthur M. Shapiro 1988-8-24 s.n. Colusa Mendocino National Forest, Near Glenn Co. line, at Goat Mtn Lookout, just below summit of Goat Mtn 1866 Comment
  JEPS15558  Eriogonum nervulosum G. Thomas Robbins with L. R. Heckard 1956-7-25 3723 Colusa 1/4 mi s summit Snow Mt. West (ridge forming s extension of Snow Mt. West); Snow Mt. West, Lake-Colusa County Boundary 2103 Comment
  UC1520695  Eriogonum nervulosum R. Raiche 1985-7-27 50667 Colusa Goat Mt. Rd. area Frenzel Creek (headwaters of creek, w of Lodoga) 707 Comment
  UCD146700  Eriogonum nudum var. nudum G. F. Hrusa 1998-10-28 14903 Colusa Inner North Coast Ranges. Along Cedar Camp Road as it enters Little Stony Creek Canyon, approximately 1 mile from Lodoga/Stonyford Road. 400 Comment
  JEPS75856  Eriogonum spergulinum var. reddingianum L. R. Heckard 1974-9-10 3894 Colusa e ridge of East Peak, Snow Mt. Snow Mt. 2042 Comment
  CHSC32206  Eriogonum strictum var. greenei James Jokerst 1980-8-8 1077 Colusa North Coast Ranges. Near Snow Mountain (west). 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
  CHSC101098  Eriogonum umbellatum var. bahiiforme D. Isle 2005-8-1 1155 Colusa In the saddle and ridge top 1/3 mile south of Goat Mountain Lookout, 1804 Comment
  CHSC92594  Eriogonum umbellatum var. bahiiforme David W. Isle 2005-8-1 1155 Colusa Mendocino National Forest--North Coast Ranges. Little Stony Creek Watershed. In the saddle and ridge top 1/3 mile South of Goat Mountain lookout. 1804 Comment
  HSC41864  Eriophyllum lanatum K. Irwin 1977-4-24 300 Colusa Along Walker Ridge Rd. above Barrel Springs Campground 701 Comment
  UCR44912  Eriophyllum lanatum L. F. LaPre 1986-5-30 s.n. Colusa Stony Creek Rd, 2.2 mi. west of Mendocino National Forest boundary, NE of Clear Lake 678 Comment
  CAS-BOT-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
  HSC66004  Eriophyllum lanatum var. achilleoides Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 39 Colusa 5.4 miles from Lodoga, along Little Stony Creek at Digger Pine Campground Comment
  JEPS75857  Eriophyllum lanatum var. achilleoides L. R. Heckard 1974-9-10 3893 Colusa along upper reaches of Dark Hollow Creek (s of East Peak); Snow Mt., Dark Hollow Creek 2042 Comment
  UC1484434  Eriophyllum lanatum var. achilleoides Dale E. Johnson with J. E. Eckenwalder 1974-6-2 128 Colusa On ridge connecting East and West peaks of Snow Mt. 1999 Comment
  RSA302654  Eriophyllum lanatum var. achilleoides Jim Shevock 1971-4-8 939 Colusa Sites-Lodoga Road 427 Comment
  SEINET10673292  Eriophyllum lanatum var. achilleoides Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 375 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UCD132205  Eriophyllum lanatum var. achilleoides Ted C. MacRae 1994-4-30 940430 -1 Colusa 1-1.5 miles northeast of junction of Hwys 20 and 16 along Bear Creek. Comment
  CAS-BOT-BC301384  Eriophyllum lanatum var. grandiflorum Roxana S. Ferris 1917-4-18 587 Colusa 5 mi west of Arbuckle, Arbuckle - Rumsey Road Comment
  CHSC8130  Eriophyllum lanatum var. grandiflorum J. G. Moore 1969-4-12 64 Colusa North side of Hwy. 20 on hillside 15 mi. w of Williams. 106 Comment
  UCD38807  Eriophyllum lanatum var. grandiflorum Beecher Crampton 1958-5-19 4813 Colusa Little Stony Creek canyon, west of Ladoga. Comment
  UCD163220  Erodium botrys Craig D. Thomsen 2000-4-28 2210 Colusa Bear Creek Botanical Management Area. CalTrans right-of-way along Hwy 20 (south side), about 0.75 mile west of Hwy 20/16 intersection. 345 Comment
  CDA28422  Erodium brachycarpum Richard R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. Comment
  SEINET8526911  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street 25 Comment
  RSA730242  Erodium brachycarpum R. R. Halse 2007-3-22 7107 Colusa Williams; by junction of 5th Street and B Street. 25 Comment
  HSC31597  Erodium cicutarium Thomas E. Higley 1974-5-5 86 Colusa 0.5 mi. S of N Fork Campground 412 Comment
  RSA669478  Erodium moschatum R. R. Halse 2001-3-22 5943 Colusa Williams, along vacant lot by 455-4th street. 18 Comment
  CAS-BOT-BC211070  Eryngium Roxana Stinchfield 1916-7-9 404 Colusa Along Sacramento River near Sycamore Comment
  CHSC91560  Eryngium aristulatum D. Isle 1995-7-12 397 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. BLM land S off Cook Springs. 548 Comment
  UCD82579  Eryngium aristulatum Craig Thomsen 2008-6-12 2769 Colusa Bear Creek (formerly Payne) Ranch. South side of Hwy 20, ca. 0.25 mi W of Hwy 16. West and SW of the corral that is located at the junction of Hwy 16 and 20. Comment
  UC21016  Eryngium aristulatum var. aristulatum J. Burtt Davy 1898-5-1 4300 Colusa near Willows Comment
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Sep 15 2014
  UCD61476  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch. Just west of the Hwy 20-Hwy 16 intersection, about 300 feet uphill to the west of the corral. 326 Comment
  UCR198153  Eryngium aristulatum var. aristulatum Gordon Harrington 2007-6-29 70 Colusa BLM Payne Ranch, just west of the Hwy 20/Hwy 16 intersection, c. 300 ft uphill to the west of the corral 326 Comment
  UC1034721  Erysimum capitatum G. B. and R. P. Rossbach 1938-5-31 851 Colusa ravine slope about 18 mi w Williams Comment
  UCD64435  Erysimum capitatum Craig D. Thomsen 2001-4-24 2474 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CAS-BOT-BC40755  Erysimum capitatum G. B. Rossbach; R. P. Rossbach 1938-5-31 851 Colusa About 18 miles west of Williams. Comment
  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
  CHSC112229  Erysimum cheiranthoides Lowell Ahart 2013-5-1 18665 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  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
  CHSC94464  Erythranthe floribunda Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  HSC72147  Eschscholzia caespitosa J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9560 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  UCD63022  Eschscholzia caespitosa Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4674 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the northwest of Eula Canyon and west of Cowboy Camp on the west side of Bear Creek. 451 Comment
  CAS-BOT-BC5882  Eschscholzia caespitosa Townsend Stith Brandegee 1889-4-1 s.n. Colusa unspecified 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-BC402975  Eschscholzia californica Roxana Stinchfield 1916-7-12 473 Colusa College City Comment
  CAS-BOT-BC5884  Eschscholzia californica 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
  CHSC70978  Euphorbia crenulata Vernon Oswald; Lowell Ahart 1998-5-7 8994 Colusa Bartlett Springs Rd. 1.6 mi west of Bear Valley Rd. Roadside bank. 487 Comment
  UCD163848  Euphorbia crenulata Craig D. Thomsen 2000-5-30 2275 b Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD66937  Euphorbia serpillifolia Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5086 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  UC73440  Euphorbia spathulata Miss M. Alice King 1905-1 Colusa near College City; Sacramento Vally Comment
  UCD169734  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. 558 Comment
  UCD64248  Euphorbia spathulata Craig D. Thomsen 2000-3-31 2050 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
  SFV8717  Euphorbia spathulata J. Addicott 1963-5-12 42 Colusa 11.2 miles from Highway 20 on road to Leesville. Comment
  UCD142493  Euphorbia spathulata J. M. Tucker 1978-5-6 4407 Colusa On east side of Bear Valley Road, Bear Valley. 10.6 miles (by road) north of junction with State Highway 20. 365 Comment
  CHSC61769  Euthamia occidentalis Vernon H. Oswald 1993-9-1 5889 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, N side of Hunters Creek in Tract 44, near the S boundary of the refuge. 22 Comment
  CHSC117784  Euthamia occidentalis David Isle; Terril Wolt 2016-6-16 2167 Colusa North Coast Range:~3/4 mile NE of Fouts Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  UCD82584  Extriplex joaquinana Craig Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-6-12 2764 Colusa Walker Ridge, near Elgin Mine on Lucientes property. 655 Comment
  UC1613498  Festuca Charles M. Belshaw 1937-4-25 2877 Colusa vicinity of Cooks Spring, Devils Ridge Inner Coast Range 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
  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
  JEPS120963  Festuca microstachys var. microstachys Lowell Ahart 2013-5-1 18696 Colusa Near a small drainage, 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
  JEPS120970  Festuca microstachys var. pauciflora Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18636 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  CAS-BOT-BC77676  Ficus carica J. H. Thomas 1960-8-30 8867 Colusa Edge of College City Comment
  UCR227906  Forestiera pubescens Ellen Dean, J. Alderson, N. Voegtly, Craig D. Thomsen 2007-5-12 3808 Colusa BLM Payne Ranch, lands to the Southwest of the junction of Hwys 16 and 20, area of ranch west of Hwy 16, near bridge that spans Bear Creek, c. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near south end of bridge, east side of creek 253 Comment
  CAS-BOT-BC63016  Frangula californica subsp. crassifolia C. B. Wolf; B. D. Stark 1933-9-25 5506 Colusa Inner n. coast range, w. side of Bear Valley, near Mitchell Ranch House. Type Locality. 304 Comment
  LA207661  Frangula californica subsp. crassifolia A. A. Heller; 1916-6-6 12359 Colusa on grade ca 3 mi W of Leesville 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
  UCD163874  Frangula californica subsp. tomentella Craig D. Thomsen 2000-5-11 2395 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 1 mile west of Hwy 20/16 instersection. Comment
  CHSC88540  Frankenia salina B. Castro; Aric Lester 2003-8-20 1442 Colusa Vicinity of Sites, Antelope Valley, and Funks Creek. In mud flats at north end and along E edge of lake. 94 Comment
  UCD67670  Fraxinus dipetala D. Sanchez-Mata 1996-6-20 s.n. Colusa Williams. Blue Ridge. Bear Valley. Bear Creek. 350 Comment
  CAS-BOT-BC223489  Fraxinus latifolia Roxana Stinchfield 1916-7-8 391 Colusa Sycamore Slough Comment
  UC1178025  Fraxinus latifolia Herbert L. Mason 1947-3-29 13156 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Creek 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
  CAS-BOT-BC130436  Fritillaria pluriflora Barbara Sherfey 1962-3-1 s.n. Colusa At top of Arbuckle Grade between Arbuckle and Rumsey Comment
  CHSC78108  Fritillaria pluriflora Dwayne Thomas 1999-4-3 22 Colusa Bear Valley Rd. 326 Comment
  CHSC79623  Fritillaria pluriflora Simona Altman 1999-4-3 52 Colusa Bear Valley, Bear Valley Rd. 396 Comment
  JEPS55682  Fritillaria pluriflora W. Roderick 1964-3-22 Colusa 1/2 mi e of summit of Lake County Line (on Highway 20 (Williams-Clear Lake)); Highway 20 (Williams-Clear Lake) 304 Comment
  UCD82525  Fritillaria pluriflora Craig Thomsen; G. Harrington 2009-5-12 2882 a 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
  SEINET8478935  Fritillaria pluriflora M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  HSC62800  Fritillaria purdyi Michelle Stevens 1979-4-14 32 Colusa 1067 Comment
  HSC71303  Galium andrewsii Thomas W. Nelson, Jane Nelson 1979-4-12 4623 Colusa Along Stony Creek below Digger Pine Campground Comment
  HSC72172  Galium andrewsii J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9549 Colusa Bear Valley Rd., 1.3 mi. from its junction with Hwy. 20 366 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
  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
  CDA42141  Galium andrewsii subsp. andrewsii T. C. Fuller 1958-5-27 Colusa South of Highway 20, 1 mile west of junction with Highway 16. 0 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
  HSC45711  Galium aparine Sheila Logan 1978-4-22 85 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD121724  Galium aparine William Pyott 1962-4-28 23 Colusa West of road in Bear Valley. 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
  JEPS75835  Galium bolanderi L. R. Heckard 1974-9-11 3952 Colusa along Summit Springs trail Snow Mt. 1798 Comment
  OBI78460  Galium bolanderi Helen K. Sharsmith & Francia Chisaki, Francia Chisaki 1959-5-27 1335 Colusa At Mill Crk crossing on rd leading out of Red Bridge Camp Comment
  JEPS75849  Galium grayanum var. nanum L. R. Heckard 1974-9-10 3898 Colusa top of East Peak Snow Mt.; , top of East Peak 2133 Comment
  JEPS24234  Galium grayanum var. nanum Peter H. Raven, R. Snow 1959-9-11 14411 Colusa s shoulder Snow Mountain 2042 Comment
  JEPS88931  Galium grayanum var. nanum Milo S. Baker 1929-7-1 3516 b Colusa near top Snow Mt. Comment
  CHSC86129  Galium parisiense Jenny Marr; Julie Cunningham, Heidi West, Caroline Warren 1998-5-27 Colusa Vicinity of Antelope Valley, Antelope Creek, and Huffmaster Road. 137 Comment
  JEPS80877  Galium parisiense L. R. Heckard and J. C. Hickman 1980-7-3 5364 A Colusa slopes about Summit Springs (sw slope of mt); Snow Mt. 1554 Comment
  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
  UCD82466  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2843 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UC1212112  Galium porrigens Francia Chisaki and Gene B. Newcomb 1958-6-19 1166 Colusa on John Smith Road (Goat Mt.-Stonyford Road) Comment
  UCD163913  Galium porrigens var. porrigens Sara Martin 2016-4-9 5 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Hill to the south of corral at junction of 16 and 20. 464 Comment
  CHSC79811  Galium porrigens var. tenue B. Castro; L. P. Janeway 2000-5-4 1128 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 246 Comment
  JEPS17975  Galium porrigens var. tenue George B. Rossbach 1955-4-9 508 Colusa Route 20; w edge of county 563 Comment
  CDA34117  Galium trifidum P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CDA42204  Galium trifidum var. pacificum G. D. Barbe, Daryl Brown 1982-7-2 3891 Colusa Mill Valley Campground, Lower Letts Lake, Mendocino National Forest. Comment
  UCR261662  Galium triflorum Ann Howald 2003-5-5 2331 Colusa Inner North Coast Ranges, Little Stony Creek at crossing of Lodoga-Stonyford Road 379 Comment
  CHSC22851  Garrya congdonii Robert A. Schlising 1962-1-31 2031 Colusa Coast Ranges. Along Stoney Creek. 441 Comment
  HSC71307  Garrya congdonii Thomas W. Nelson, Jane P. Nelson 1979-4-12 4619 Colusa Along Stony Creek below Digger Pine Campground Comment
  UCD121092  Garrya congdonii G. Jones 1934-2-11 s.n. Colusa Above Williams. Comment
  UCD121094  Garrya congdonii D. Sanchez-Mata 1998-7-9 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain Road between Lodoga and Red Rock Cabin. 450 Comment
  UCD121096  Garrya congdonii Robert D. Slayback 1959-3-20 2 Colusa Near State Highway 16, 6 miles northwest of Rumsey. Comment
  OBI14152  Garrya veatchii Rimo Bacigalupi, G. T. Robbins 1954-6-25 4623 Colusa 1/2 mi E of summit (Lake-Colusa County line) on rd from Indian Valley (Lake County) to Bear Valley (Colusa County) 549 Comment
  CDA5308  Gaura neomexicana Kingwill Jun 1944 Colusa 0 Comment
  JEPS80145  Gayophytum diffusum subsp. parviflorum L. R. Heckard with J. Hickman 1980-7-2 5306 Colusa trail from Summit Springs to Snow Mt. peaks ((ca 10 mi w of Stonyford), Colusa-Lake Co. line) 1722 Comment
  JEPS76801  Gayophytum heterozygum L. R. Heckard 1974-9-9 3854 Colusa near Foutch Camp; Snow Mt. 1889 Comment
  JEPS80183  Gayophytum humile L. R. Heckard with J. Hickman 1980-7-3 5335 Colusa just w Summit Springs (sw Snow Mt., ca 10 mi w of Stonyford, Colusa-Lake County boundary); Snow Mt. 1548 Comment
  CHSC77934  Geranium carolinianum Beth Hendrickson; Jean Witzman 1999-4-22 Colusa Vicinity of Antelope Valley and Sites. 152 Comment
  RSA0028445  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UCD82816  Geranium dissectum Craig Thomsen; G. Harrington 2009-5-12 2890 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 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
  CHSC79788  Gilia capitata G. F. Hrusa 1998-6-19 14611 Colusa Above upper Little Stony Creek. Goat Mtn. Rd. ~ 1.5 km. W of campground. UTM: 10S, 05356N, 43478E. 485 Comment
  POM163453  Gilia tricolor Roxana S. Ferris 1926-4-23 6403 Colusa Grade beyond the Mountain House on the Williams-Stonyford Road. Comment
  POM282251  Gilia tricolor Lyman Benson 1929-3-26 1043 Colusa Wilbur Springs Comment
  RSA293157  Gilia tricolor J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9563 Colusa Bear Valley Road, 2.1 miles from its junction with State Route 20. 366 Comment
  UCD64267  Gilia tricolor Craig D. Thomsen 2000-3-31 2065 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
  RSA388848  Gilia tricolor Virginia King 1975-4-20 9 Colusa Bear Valley Road, 8.7 miles north of State Highway 20 412 Comment
  SEINET12326985  Gilia tricolor Unknown 1984-1 7 Colusa ca 0.5 km W of jct of Hwys 20 and 16, S side of Bear Creek, ca 29 SW of Williams 322 Comment
  RSA0118785  Gilia tricolor subsp. diffusa Lowell A. Ahart 2013-5-1 18684 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
  UC719300  Gilia tricolor subsp. tricolor F. G. Meyer 1938-4-5 1356 Colusa about 10 mi w Williams; w of Williams 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
  CHSC79484  Githopsis specularioides B. Castro; L. P. Janeway 2000-5-4 1141 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 248 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
  UC1563931  Glinus lotoides Barbara Ertter with Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8871 Colusa n of Lodoga (se end of East Park Reservoir); East Park Reservoir 365 Comment
  UCD72477  Glycyrrhiza lepidota Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3811 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, across from BLM parking lot that is located at south end of bridge. 249 Comment
  UCR225394  Gnaphalium californicum Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5099 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western part of ranch along ridge trail at Cache Creek Canyon, just south of junction with trail that leads east to Brophy Canyon and Thompson Creek 495 Comment
  CAS-BOT-BC303890  Gnaphalium palustre Roxana Stinchfield 1916-7-9 409 Colusa Phillips Ranch Comment
  JEPS75841  Gnaphalium palustre L. R. Heckard 1974-9-10 3915 Colusa ne slope of West Peak (Snow Mt., along dry creek bed near seep area); Snow Mt., West Peak 2011 Comment
  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
  RSA724829  Grindelia camporum L. Ahart 2006-9-26 13345 Colusa Between the deep ditch and the Delevan National Wildlife Refuge, north side of Maxwell Road, about 3 miles west of Colusa Princeton Road, about 5.5 miles east of Maxwell. 24 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
  UCR261756  Grindelia camporum Ann Howald 2003-5-30 2356 B Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, peninsula c. 2 miles north of Lodoga, Big Boot camping area 365 Comment
  CDA6134  Grindelia camporum var. camporum M. S. Bergseng 1959-5-8 2343 Colusa Arbuckle. 0 Comment
  UC32098  Grindelia hirsutula J. Burtt Davy 1898-5-1 4271 Colusa near Willows Comment
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Sep 15 2014
  UC71784  Grindelia hirsutula H. P. Chandler 1905-9-14 Colusa Princeton Comment
  UCD82539  Grindelia hirsutula Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5692 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UCD66996  Gutierrezia californica Gordon Harrington 2008-8-14 79 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 junction. Just south of the Brophy Creek - Bear Creek confluence on the east side of Bear Creek (west side of Hwy 16). North side of gravel turn-out. 210 Comment
  CHSC112271  Hainardia cylindrica Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18638 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD36223  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
  UCD85235  Hainardia cylindrica D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  JEPS96685  Harmonia hallii Dean W. Taylor 1998-6-23 16703 Colusa Walker Ridge, along BLM access road 929 Comment
  UCD83819  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
  CDA34807  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Road, ~8.3 km N of jct. with Hwy. 20, ~1 km N of jct with Indian Valley Reservoir Rd., at road cut, both sides and adjacent slopes. Comment
  CHSC117407  Helenium puberulum B. Castro; Tom Boullion 2009-6-26 1795 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Rd off Hwy 45, just W of Ogden Bend on W bank of the Sacramento River at RM 130.8. 17 Comment
  JEPS127589  Helenium puberulum B. Castro with Tom Boullion 2009-6-26 1795 Colusa Sacramento Valley. Ca 8 air mi SE of Colusa, via Buster Road off Highway 45, just W of Ogden Bend on W bank of the Sacramento River at RM130.8. Grimes 7.5' Quad. Comment
  UCD64431  Helianthus annuus Craig D. Thomsen 2000-6-23 2428 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
  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
  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
  UCD55469  Heliotropium curassavicum Ellen Dean; Gordon Harrington 2006-10-6 3293 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UCD72395  Heliotropium curassavicum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5121 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 lamp road southeast (downslope) of junction with ridge trail. 384 Comment
  CHSC113041  Heliotropium curassavicum var. oculatum Lowell Ahart 2013-10-1 19096 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CDA20053  Heliotropium europaeum D. Brown 2002-10-4 PDR 019525 Colusa Northern California; Vicinity of Colusa 0 Comment
  JEPS40378  Hemizonia congesta subsp. clevelandii W. L. Jepson 1938-6-11 18987 Colusa on creek 4 mi se Wilbur Sprs.; Bear Creek 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
  SEINET10797452  Hemizonia congesta subsp. clevelandii Katherine L. Morris, Melvin L. Conrad; David B. Dunn 1973-6-6 Morris 382 Colusa Chaparral woodland and sparse oaks; on Hwy. 20, 0.3 mi. E of Lake County line. Comment
  UC725797  Hemizonia congesta subsp. luzulifolia A. A. Heller 1939-10-1 15482 Colusa between Williams Maxwell Comment
  UCD70251  Hemizonia congesta subsp. luzulifolia D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. 450 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
  CHSC80150  Hemizonia parryi subsp. parryi B. Castro; G. Kuenster 2000-7-19 1202 Colusa Vicinity of Maxwell, Funks Creek, and the Glenn-Colusa canal, on low terrace beside S edge of shallow intermittent stream channel draining eastward out of the hills east of Golden Gate. 41 Comment
  POM56197  Hemizonia pungens subsp. pungens A. A. Heller 1902-5-19 5572 Colusa Near Colusa. Comment
  JEPS75707  Heracleum lanatum Alice Q. Howard 1972-7-10 10 Colusa stream crossing trail between Fouts Camp and Box Springs (lower of 2 wet places along trail on n. side of ridge separating Trout & Paradise Creeks, Snow Mt.); Snow Mt. 1600 Comment
  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
  JEPS122821  Hesperolinon californicum W. A. Freyman with A. C. Schneider & Y. P. Springer 2014-5-20 288 Colusa Along north side of Goat Mountain Road west of Lodoga. Comment
  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
  UC1212449  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4252 Colusa 1 mi n origin of Wilbur Springs road (near Hwy 20); Inner North Coast Ranges, Bear Creek drainage 365 Comment
  UC867722  Hesperolinon californicum A. A. Heller 1916-6-6 12352 Colusa on the grade about 3 mi w Leesville; Coast Range Comment
  UCD63873  Hesperolinon californicum Craig D. Thomsen 2008-5-31 2759 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwys 16 and 20. Cowboy Camp area on the west side of Hwy 16, 1 mile south of Hwy 20. 0.25 mile west of public viewing area and Bear Creek. 305 Comment
  CHSC112217  Hesperolinon disjunctum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18635 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 mile (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UC1212484  Hesperolinon disjunctum Helen K. Sharsmith 1952-6-21 4158 Colusa 0.9 mi e Cook Springs; Inner North Coast Ranges 518 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
  UC1212487  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4253 Colusa ca one mi above Diversion Dam of Big Stony Creek (near road from Stoneyford to Fouts Springs); Inner North Coast Ranges, Mendocino National Forest; above Diversion Dam of Big Stoney Creek, Mendocino National Forest, Colusa Co. 518 Comment
  UC1212498  Hesperolinon disjunctum Helen K. Sharsmith 1951-7-13 4033 Colusa on Bartlett Springs road 4.4 mi from Leesville (western margin of county); Inner North Coast Ranges 609 Comment
  UCD67057  Hesperolinon disjunctum Craig D. Thomsen 2008-5-23 2752 Colusa BLM Payne Ranch. Lands to the SW of Hwy 16/20 intersection. About 1 mile south of Hwy 20 (south of Destanella Flat), 2.5 miles west of Hwy 16. 470 Comment
  UCR45096  Hesperolinon disjunctum L. F. LaPre 1986-5-30 s.n. Colusa 1.5 mi west of Mendocino National Forest Boundary on Stony Creek Rd [c. 4 mi. west of Stonyford] 671 Comment
  CAS-BOT-BC176220  Hesperolinon disjunctum Helen K. Sharsmith 1953-6-18 4254 Colusa One mile beyond Wolf Glade on spur road, drainage of Stoney Creek, Mendocino National Forest 609 Comment
  CHSC111649  Hesperolinon drymarioides David Isle; Geri Hulse-Stephens 1979-6-15 2060 Colusa Mendocino National Forest - North Coast Ranges Little Stony Creek Watershed. NE of junction of Frenzel Creek with Little Stony Creek. 426 Comment
  SD8554  Hesperolinon drymarioides Katherine Curran Aug 1884 Colusa Epperson's Comment
  UC1212301  Hesperolinon drymarioides Helen K. Sharsmith 1953-7-1 4407 Colusa serpentine slope on n side canyon directly adjacent to Cook Springs (at end of road, ca five mi sw of Ladoga by road); Inner North Coast Ranges Comment
  UCD110522  Hesperolinon drymarioides P. Rodriguez-Rojo 1997-7-25 s.n. Colusa Walker Ridge Rd. 890 Comment
  RSA0089768  Heteranthera dubia Dean Wm. Taylor 2014-5-18 21476 Colusa 3.5 miles southwest of Maxwell; eastern bank of the Glenn-Colusa Canal downstream of the crossing of Fairview Road. 35 Comment
  SBBG115923  Heteranthera dubia R. Yeo -Oct-1976 Colusa 3 mi N of Williams, Glenn-Colusa Canal irrigation district Comment
  UCD19075  Heteranthera dubia Richard Yeo 1976-10-1 s.n. Colusa 3 mi. north of Williams, Glenn-Colusa Canal irrigation district. Comment
  UCR141657  Heteranthera dubia R. Yeo 1976-1 s.n. Colusa 3 mi N of Williams, Glenn-Colusa Canal irrigation district 24 Comment
  JEPS73775  Heuchera micrantha var. pacifica L. R. Heckard 1972-7-10 3126 Colusa 3 mi nw Fouts Springs (on se corner of Snow Mt.); Snow Mt 1828 Comment
  RSA86288  Hibiscus lasiocarpos Verne Grant 1946-8-6 7837 Colusa Butte Creek, 1 mile north of Butte Outing Gun Club, near Colusa. Comment
  UC914092  Hibiscus lasiocarpos Milo S. Baker 1946-9-4 11608 Colusa near locked gate of Colusa Gun Club Butte Sink Comment
  CDA38628  Hibiscus trionum Ken Flagor 2012-8-28 PDR# 060 P089080 Colusa North of Maxwell; north of Lenahan Road, south of Delevan Road, west of Sutton Road, east of McDermott Road. 0 Comment
  CHSC32210  Hieracium greenei James Jokerst 1980-8-7 1061 Colusa North Coast Ranges. Near Snow Mountain (west). 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
  CDA20339  Holocarpha virgata D. Brown 2001-10-17 PDR 024366 Colusa Northern California; Vicinity of Colusa 0 Comment
  RSA0118629  Holocarpha virgata subsp. virgata Lowell A. Ahart 2013-10-1 19099 Colusa Near strand of East Park Reservoir, about 2 miles (air) southeast of Stonyford, about 3 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 375 Comment
  CAS-BOT-BC152578  Holodiscus discolor var. discolor A. A. Heller 1916-6-6 12362 Colusa Coast Range on the grade about 3 miels west of Leesville Comment
  HSC10153  Hordeum brachyantherum C. R. Phillips 1964-3-30 Colusa Colusa, vacant lot Comment
  UCD61443  Hordeum brachyantherum Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3888 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek.Approximately 1000 ft NW of parking lot. 339 Comment
  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
  POM198500  Hordeum depressum Roxana S. Ferris 1917-4-12 518 Colusa 4 miles east of Williams Comment
  SD225718  Hordeum depressum Carol Witham, Jennifer Buck 2001-4-30 161 Colusa 2 mi. south of the town of Colusa along Hwy 20, east east of Hwy 20 and the Colusa Airpo9rt, Dolan Ranch site, pool # DOL001 Comment
  CHSC53989  Hordeum jubatum Vernon H. Oswald 1991-4-21 4526 Colusa Four Mile Rd, 1.9 mi north of Maxwell Colusa Rd. Roadside ditches in area of rice fields. 27 Comment
  CAS-BOT-BC285062  Hordeum marinum subsp. gussoneanum L. R. Abrams 1928-5-8 12593 Colusa 2 miles south of Arbuckle Comment
  UCD163712  Hordeum marinum subsp. gussoneanum Craig Thomsen 1999-5-10 2023 b Colusa Colusa County. At confluence of Sulphur Creek and Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD163872  Hordeum marinum subsp. gussoneanum Craig D. Thomsen 2000-3-31 2173 Colusa Bear Creek Botanical Management Area. Caltrans right-of-way on south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection. Comment
  SEINET3271561 Image available Hordeum murinum George K. Helmkamp, E. A. Helmkamp 2009-3-11 14371 Colusa Inner North Coast Range Foothills; along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCD57281  Hordeum murinum subsp. glaucum Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3649 Colusa BLM Payne Ranch. Mouth of Craig Canyon. Along unimproved road, about 2 road miles south of junction of Hwy 20 and Hwy 16. . 316 Comment
  JEPS80220  Hordeum murinum subsp. leporinum L. R. Heckard and J. Hickman 1980-7-3 5376 Colusa w Summit Springs (sw slope Snow Mountain); sw slope Snow Mountain 1554 Comment
  UCD86153  Hordeum murinum subsp. leporinum Beecher Crampton 1962-4-17 6214 Colusa Sycamore. Comment
  CHSC48848  Horkelia californica subsp. dissita Vernon Oswald 1984-7-20 1614 Colusa Lily Pond n of Letts Lake in Mendocino National Forest. On the edge of a meadow. 1280 Comment
  CHSC88588  Horkelia californica subsp. dissita L. P. Janeway; B. Castro 2001-6-3 7100 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. Meadow. 884 Comment
  JEPS80245  Horkelia californica subsp. dissita L. R. Heckard and J. Hickman 1980-9-15 5420 Colusa w Summit Springs (Snow Mt.); , w of Summit Springs 1554 Comment
  CHSC62925  Hornungia procumbens Vernon H. Oswald; Lowell Ahart 1994-4-6 6075 Colusa Goat Mtn. Rd. 0.3 mi S of Little Stony Creek Bridge, SW of Digger Pine Flat, SSW of Stonyford. Along a drainage. 548 Comment
  UCD146730  Hosackia crassifolia var. crassifolia G. F. Hrusa 1998-6-19 14617 Colusa North Coast Ranges. Along USFS Pacific Ridge Road. (M5) Above intersection with Goat Mountain Road. 1120 Comment
  UCD67123  Hosackia oblongifolia Ellen Dean; Davis Botanical Society 2008-5-31 5055 Colusa west of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs. 787 Comment
  JEPS80063  Hydrophyllum occidentale L. R. Heckard and J. Hickman 1979-6-15 5069 Colusa saddle between e and w peaks Snow Mt. 2103 Comment
  UCD67029  Hydrophyllum occidentale Ellen Dean; Davis Botanical Society 2008-5-31 5012 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  JEPS80445  Hypericum formosum var. scouleri L. R. Heckard and J. C. Hickman 1980-9-15 5422 A Colusa w. of Summit Springs (Snow Mt.); Snow Mt. 1554 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
  CHSC71008  Iris macrosiphon Vernon Oswald; Lowell Ahart 1998-5-7 9008 Colusa Bartlett Springs Rd. 2.2 mi west of Bear Valley Rd., 0.7 mi east of Sawtelle Valley and Grapevine Flat roads. 524 Comment
  HSC31612  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  UCD163714  Iva axillaris Craig Thomsen 1999-5-10 2007 Colusa Colusa County. In canyon between Wilbur Springs Bridge and Bear Valley. About 4 miles north of Hwy 20. Comment
  UCD63772  Iva axillaris Craig D. Thomsen 2008-3-30 2723 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20, 0.25 mile west of Hwy 16, about 1 mile south of Hwy 20. Comment
  UCD82635  Juglans hindsii Jack Alderson 2009-9-19 31 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Along Bear Creek, SE of mouth of Craig Canyon. 304 Comment
  JEPS106451  Juncus Barrett Anderson 2003-6-19 4875 Colusa Colusa County Airport along Hwy 20 SE of City of Colusa, pond N of the runway. 13 Comment
  HSC62947  Juncus balticus subsp. ater Marla J. Carollo 1979-4-14 32 Colusa Bear Valley Rd., 3.9 mi. N of Hwy. 20, next to Bear Creek. 412 Comment
  UCD61468  Juncus balticus subsp. ater Ellen Dean; G. Harrington, N. Voegtly, J. Alderson, C. Thomsen 2007-6-24 3914 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwy 16 and Hwy 20. West of BLM equestrian parking lot (Cowboy Camp) on west side of Bear Creek. Approximately 1/2 mile south of parking lot, along Bear Creek. 312 Comment
  JEPS15540  Juncus covillei var. obtusatus G. Thomas Robbins with L. R. Heckard 1956-7-25 3698 Colusa se extension Snow Mt. West (at e base of ridge that forms extension, about 0.5 air mi from its summit, Lake-Colusa County boundary) 1889 Comment
  JEPS75732  Juncus howellii L. R. Heckard 1974-9-9 3871 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 Comment
  JEPS75870  Juncus howellii L. R. Heckard and J. H. Thomas 1974-9-10 2890 Colusa s East Peak (upper reaches of creek); Snow Mt., Dark Hollow Creek 2011 Comment
  JEPS80271  Juncus howellii L. R. Heckard, and J. Hickman 1980-9-16 5454 Colusa e of West Peak (first meadow along trail from Frog Pond in cirque area); Snow Mt. 1981 Comment
  JEPS73502  Juncus laccatus L. R. Heckard 1972-7-10 3120 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 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
  CDA39268  Juncus patens L. P. Janeway 2000-5-31 6777 Colusa Inner North Coast Ranges; At Candy Bucket Springs, on the south side of canyon of Stony Creek. Comment
  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
  CHSC107157  Juncus xiphioides L. P. Janeway; B. Castro 2011-4-27 10246 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. Generally lush grassland, almost flat upland around the marsh. 52 Comment
  UCD133669  Juniperus californica L. Ahart 1971-6-10 79 Colusa Near Sites. 76 Comment
  UCD63024  Juniperus californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4676 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. 493 Comment
  CHSC107962  Koeleria phleoides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1851 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; 5 air mi NW of Maxwell, 1 mi southeast of Funks Reservoir and 170 ft northeast of Tehama-Colusa Canal. Ca 0.15 mi S of large +- saline/alkaline wetland/marsh, on dry grassy hillside just downslope from canal. 59 Comment
  CHSC76798  Lactuca saligna Heidi West; Joyce Lacey-Rickert 1998-10-29 Colusa Vicinity of Antelope Valley and Sites. 109 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
  RSA0011766  Lagophylla dichotoma Ethel Crum 1938-5-8 2033 Colusa Inner North Coast Range, 3 miles N of Leesville. Comment
  CAS-BOT-BC341395  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa Ridge between Venado and Leesville Comment
  CHSC27635  Lagophylla minor Timothy Spira; Robert Schlising 1978-5-13 3240 Colusa Just E of Lake County line, along Hwy 20. 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
  UC596300  Lagophylla minor R. F. Hoover 1938-4-24 3226 Colusa ridge between Venado and Leesville Comment
  UC638652  Lagophylla minor Ethel Crum 1938-5-8 2033 Colusa 3 mi n Leesville; Inner North Coast Range 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
  UCSB6616  Lagophylla minor Keator, Glenn 1958-6-17 Colusa Near roads at Houghs Springs, in hill country Comment
Read comments
May 24 2013
  CAS-BOT-BC341472  Lagophylla ramosissima Roxana Stinchfield 1916-6-22 313 Colusa College City Comment
  POM50993  Lagophylla ramosissima Roxana Stinchfield 1916-6-22 313 Colusa College City. Comment
  UCD159332  Lagophylla ramosissima D. S. Park 2010-6-5 116 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 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
  UCD163305  Lasthenia californica Craig D. Thomsen 1997-4-7 1896 Colusa Bear Valley. About 5 miles north of Hwy 20. Comment
  POM53876  Lasthenia ferrisiae Roxana S. Ferris 1917-4-12 503 Colusa 4 miles east of Williams. Comment
  RSA31635  Lasthenia ferrisiae A. A. Heller 1929-3-12 14824 Colusa 2 miles N of Maxwell. Comment
  CAS-BOT-BC352922  Lasthenia glaberrima J. M. Tucker 1978-5-6 4408 Colusa West side of Bear Valley Road, 11 miles (by road) north of junction with State Hwy 20 396 Comment
  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
  CHSC8124  Lasthenia glabrata J. G. Moore 1969-4-12 65 Colusa In orchard 300 yds. s of junction with Hwy. 20 on Hwy. 16, e side of road. 106 Comment
  UCD163695  Lasthenia glabrata Craig Thomsen 1999-4-27 1997 Colusa Bear Valley. About 6 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CDA32830  Lasthenia glabrata P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CAS-BOT-BC328109  Lasthenia glabrata subsp. coulteri Roxana S. Ferris 1917-4-12 503 Colusa 4 miles E of Williams Comment
  HSC96787  Lasthenia glabrata subsp. glabrata J. Carey, A. Hong, J. Leffingwell 1995-4-1 30 Colusa Bear Valley Rd., 1.2 mi. S of its junction with Brim Rd. 415 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
  UCD64046  Lasthenia glabrata subsp. glabrata Craig D. Thomsen 2000-3-31 2046 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCR247331  Lasthenia glabrata subsp. glabrata Peter Rubtzoff 1978-5-14 9167 Colusa Inner North Coast Range, Bear Valley Road, c. 4-5 miles south of junction of the road to Ft. Ross State Historic Park, Bartlett Springs Road 405 Comment
  UCD132538  Lasthenia gracilis Beecher Crampton 1958-4-21 9169 Colusa 3.5 miles N.W. of Lodoga by road. Comment
  UCD33938  Lasthenia gracilis Beecher Crampton 1958-4-21 9169 Colusa Colusa County, 3.5 miles N.W. of Lodoga by road. Comment
  UCD82464  Lasthenia gracilis Craig Thomsen; G. Harrington 2009-5-12 2841 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD67932  Lasthenia gracilis Greg Vita 1978-4-7 1 Colusa Bear Valley, 10.3 mi. N. of State Route 20. Open grassland with full sun. 396 Comment
  JEPS9958  Lasthenia platycarpha W. I. Follett 1935-3-31 23 Colusa 1.7 mi s Williams (from a point on the main highway) Comment
  JEPS95647  Lathyrus jepsonii var. californicus Vernon H. Oswald and L. Ahart 1999-6-22 9782 Colusa West of Stonyford and 0.7 mi south of Letts Lake Road on FS 17N02: T17N R8W Sect. 25, 4440 ft, mixed coniferous forest 1353 Comment
  HSC67099  Lathyrus vestitus subsp. vestitus Teri Bartowski, Carol Zimmerer, Ruth Takaki, Shane Feusier 1980-4-19 38 Colusa Bartlett Springs Rd. at stream crossing. Comment
  CAS-BOT-BC323886  Layia chrysanthemoides Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-4-1 010 Colusa On Bear Valley Road, 1.2 miles S of junction with Brim Road. 414 Comment
  CAS-BOT-BC323903  Layia chrysanthemoides Roxana S. Ferris 1926-4-23 6404 Colusa Roadside near Mountain House on Williams-Stonyford Road 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
  CHSC9545  Layia chrysanthemoides J. M. Barnum 1968-3-30 60 Colusa Annual stream, 50 ft. s of hwy. 20, 18 mi sw of Williams. 1/4 mi w of junction of hwy. 16. 548 Comment
  UCD164148  Layia chrysanthemoides Craig Thomsen 1997-4-20 1923 Colusa Bear Valley. About 8 miles north of Hwy 20. Comment
  HSC62779  Layia chrysanthemoides Thomas Wood 1979-4-14 109 Colusa Bear Valley 396 Comment
  CHSC27853  Layia fremontii Phil Blumert 1978-3-28 16 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, ca. 18 mi sw of Williams. 321 Comment
  HSC90060  Layia fremontii C. Baldwin, A. Hiss, P. Reynolds 1990-4-15 51 Colusa Bear Valley 409 Comment
  UCD15425  Layia fremontii Margit Sands 1985-4-13 28 Colusa in Bear Valley, 3.8 miles north of Wilbur Hot Springs rd.; 390 Comment
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Apr 18 2009
  UCD133896  Layia gaillardioides E. Jacqueline Garcia 1986-4-13 s.n. Colusa Bear Valley. 390 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
  HSC85935  Layia platyglossa Michalski, Hopson, Raum 1987-4-12 62 Colusa Bear Valley Comment
  JEPS39673  Layia platyglossa Rimo Bacigalupi, T. Crovello, and L. Heckard 1965-4-26 9044 Colusa 5.5 mi n of Wilbur Springs turnoff; Tout Creek, Bear valley Comment
  CAS-BOT-BC380898  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CDA8151  Layia platyglossa P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  SEINET11447842 Image available Layia platyglossa M. J. Williams 1967-5-7 s.n. Colusa Bear Valley 396 Comment
  UCD135674  Layia platyglossa Bruce G. Baldwin 1986-4-13 597 Colusa Bear Valley, 7.3 miles north of junction with California State Highway 20 along Bear Valley Road. Comment
  CAS-BOT-BC329322  Layia septentrionalis Ethel Crum 1938-5-7 2013 Colusa Summit of ridge, Comanche Hills, 4 miles NE of Rumsey 254 Comment
  CAS-BOT-BC329324  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
  UCR261644  Layia septentrionalis Ann Howald 2003-3-26 2290 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
  UCR261646  Layia septentrionalis Ann Howald 2003-4-23 2313 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, east of Coppermine Road, c. 1.1 mi north of intersection with East Ruby King Road 403 Comment
  UCR261647  Layia septentrionalis Ann Howald 2003-4-23 2309 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  CHSC116673  Lemna minuta Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20723 Colusa Small pond on the east side of the graveel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  POM312456  Lemna minuta H. L. Mason, Verne Grant 1946-8-6 12966 Colusa Pond on Colusa-Marysville Hwy, 4 miles S of Colusa, west side of Sacramento River. Comment
  CHSC46882  Lemna trisulca Vernon Oswald 1989-9-12 4005 Colusa Lily Pond near Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. In pool at the outlet of the 'Lily Pond. 1341 Comment
  UCD138208  Lemna trisulca J. M. Tucker; L. K. Mann, John Tothill 1959-5-30 3532 Colusa on small lake in Mill Valley, around 1/4 mile northwest of Lower Letts Valley, and around 4 miles, airline, north of Goat Mountain Lookout. Comment
  CHSC61120  Lemna turionifera Vernon H. Oswald 1993-6-23 5570 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, near the SE corner of Cell 2, Pool 10. Along the edge of a marsh. 21 Comment
  UCD67066  Lepechinia calycina Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5094 -a Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. South of Dunsfield Flat. 554 Comment
  CHSC106232  Lepidium latifolium B. Castro; L. P. Janeway 2001-6-3 1255 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.5 mi E of Baldy Mountain. Small strip of this species along old roadbed at head of the springs. 883 Comment
  CHSC91136  Lepidium latifolium D. Isle 1997-7-31 333 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. 3 mi. S of jct. Bartlett Springs/Bear Valley Rd. 304 Comment
  UCD72469  Lepidium latifolium Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3803 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
  UCR201550  Lepidium latifolium George 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 18 Comment
  UCR206890  Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2009-5-20 14748 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
  CAS-BOT-BC89762  Lepidium latipes M. K. Curran 1885-1-1 s.n. Colusa Williams. Comment
  UC10646  Lepidium latipes J. Burtt Davy May 1898 Colusa near Willows Comment
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Sep 15 2014
  CAS-BOT-BC89761  Lepidium latipes Brandegee s.n. Colusa Unspecified. Comment
  CHSC112923  Lepidium latipes var. latipes B. Castro; L. Janeway, Robin Carter 2010-3-23 1802 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal, in disturbed, grazed annual grassland. 120 Comment
  CHSC52006  Lepidium nitidum Camille M. Corda 1982-4-12 17 Colusa Ca. 0.3 mi w of jct of Hwys 20 and 16, s side of Bear Creek, 100 ft from n side of Hwy 20, ca. 18 mi sw of Williams. 321 Comment
  UC1100306  Leptochloa fascicularis Herbert L. Mason 1945-9-19 12720 A Colusa e bank of river 1 mi n Colusa (below causeway); Sacramento River Comment
  CAS-BOT-BC273930  Leptochloa fusca subsp. fascicularis Milo S. Baker 1944-7-18 10868 Colusa Several miles W. of Williams along Highway to Lake Co. Comment
  UCD82365  Leptosiphon androsaceus Robin McMaster 1973-4-15 335 Colusa 1/2 mi towards Bartlett Springs from Bear Valley Road. Comment
  HSC83422  Leptosiphon bicolor C. Pauls 1975-4-20 8 Colusa Bear Valley Rd., 8.7 mi. N of Hwy. 20 Comment
  RSA424704B  Leptosiphon bicolor Aaron Liston, M. A. Blumler 1987-4-26 667 -6 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  UCD55172  Leptosiphon bolanderi Kim E. Steiner 1978-4-29 202 Colusa Walker Ridge Road; 1.5 miles N of State Hwy 20. 777 Comment
  CHSC23879  Leptosiphon ciliatus G. E. Bowen 1971-3-27 11 Colusa 11 mi. w of Williams, n side of road, about 10 yards. 213 Comment
  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
  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
  HSC90410  Leptosiphon latisectus Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-11 64 Colusa 6 mi. E of intersection between Walker Ridge Rd. and Bear Valley Rd. 293 Comment
  CHSC1269  Leptosiphon parviflorus V. Holt 1935-5-12 Colusa Stonyford. Comment
  CHSC79792  Leptosiphon parviflorus L. P. Janeway; B. Castro 2000-5-4 6703 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 262 Comment
  UCD73115  Leptosiphon parviflorus Ellen Dean; G. Harrington 2008-3-17 4560 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy 16 and Hwy 20. Along old, unimproved road that traverses the ridge above the saddle between Thompson and Craig Canyons. 418 Comment
  UCD82545  Leptosiphon parviflorus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5700 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 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
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Apr 18 2009
  UC1051736  Lesquerella occidentalis subsp. occidentalis Helen K. Sharsmith 1953-6-20 4291 Colusa summit of Goat Mountain Inner North Coast Ranges, Mendocino National forest, Goat Mt (Lake-Colusa boundary) 1864 Comment
  NY180562  Lessingia adenophora M. K. Curran 1884-1 s.n. Colusa At Epperson's Comment
  UC1299302  Lessingia micradenia var. glabrata Freed W. Hoffman 1947-6-19 1658 Colusa Cooks Springs Comment
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Sep 27 2007
  UCR227342  Lessingia nemaclada Craig D. Thomsen 2001-5-24 2487 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
  RSA0118883  Lessingia ramulosa Lowell Ahart 2013-10-1 19068 Colusa Inner North Coast Range. North of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  RSA700360  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  HSC63081  Lewisia rediviva David Wheeler 1979-4-14 62 Colusa Buck Flat, Walker Ridge, on the way to Barrel Springs 884 Comment
  UCD56681  Lewisia rediviva Roger Willmarth 2007-3-25 1 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 563 Comment
  CHSC53964  Limnanthes douglasii subsp. nivea Vernon H. Oswald 1991-4-21 4517 Colusa Lodoga Stonyford Rd, ca. 2 mi south of Stonyford. Along drainages in pastures. 371 Comment
  UC71645  Limnanthes douglasii subsp. rosea Miss Alice King 1905-1 Colusa College City 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
  UC614691  Linanthus ciliatus L. Constance 1938-4-22 2149 Colusa 11 mi ne Lake-Colusa County line (Lower Lake-Williams road, above Salt Creek); Inner North Coast Ranges 152 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
  UCD167523  Linanthus dichotomus subsp. meridianus James Neilson Unknown s.n. Colusa 2.5 miles south of Lodoga. (Exact location unknown. Coordinates estimated by label maker.) Comment
  UC200996  Linanthus parviflorus Brandegee 1889-1 Colusa Leesville Comment
  JEPS86704  Linanthus rattanii L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6697 Colusa 0.5 km w Summit Springs (sw flank of mtn., Colusa-Lake County line); Snow Mtn. 1500 Comment
  CHSC77955  Lithophragma affine Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Antelope Valley, Funks Creek, and Golden Gate. 137 Comment
  UCD58099  Lithophragma affine Ellen Dean; C. Thomsen, S. Bledsoe, G. Harrington, D. Hickson 2007-3-25 3476 Colusa BLM Payne Ranch. Lands to the southwest of the intersection of Hwy. 16 and Hwy. 20. Destinella Flat, just E of the Lake County Border. Ca. 3.4 miles along Hwy. 20 from junction of Hwy. 20 and Hwy. 16. 560 Comment
  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
  CHSC79454  Logfia filaginoides B. Castro; L. P. Janeway 2000-5-2 1119 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC1614399  Logfia filaginoides Charles M. Belshaw 1937-4-25 2882 Colusa vicinity of Cook's Spring, Devil's Ridge. Inner N coast range Comment
  CAS-BOT-BC269050  Lolium perenne Roxana Stinchfield 1916-6-17 491 Colusa Road to Tule near College City Comment
  JEPS80876  Lolium perenne L. R. Heckard and J. C. Hickman 1980-7-3 5365 A Colusa sw slope Snow Mt. (grazed slopes about Summit Springs); sw slope of Snow Mt., about Summit Springs 1554 Comment
  UCD84437  Lolium perenne Jack Alderson 2009-4-19 35 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Destinella Flat. 553 Comment
  RSA0011990  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17119 Colusa Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  CHSC42597  Lomatium californicum Vernon Oswald 1986-6-4 2080 Colusa M10, 0.2 mi w of its jct. with M5. 609 Comment
  UCD82548  Lomatium californicum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5703 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  UCD127607  Lomatium californicum D. Sanchez-Mata 1998-7-10 s.n. Colusa Stonyford. Fouts Springs Road. 640 Comment
  UC1409830  Lomatium ciliolatum var. ciliolatum James E. Eckenwalder and Dale E. Johnson 1974-6-2 358 Colusa below summit of East Peak Snow Mt. (on divide between East & West Peaks); , East Peak Comment
  OBI54946  Lomatium ciliolatum var. hooveri Robert F. Hoover 1941-5-2 4987 Colusa Just E of Lake Co. line on Williams-Clear Lake hwy Comment
  UCR139083  Lomatium ciliolatum var. hooveri A. Burgard, J. Goldsmith, J. Kalt 1996-3-30 23 Colusa Brim Road 9.4 mi north of Walker Ridge Road. 57 mi east of Hwy 101 on Hwy 20 777 Comment
  HSC60362  Lomatium ciliolatum var. hooveri Phyllis Krieg 1979-4-14 Colusa 1067 Comment
  CAS-BOT-BC478201  Lomatium hooveri Ann Howald 2003-3-26 2288 Colusa Inner Coast Ranges: Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.3 miles northwest of intersection with East Ruby King Road 419 Comment
  UC1049547  Lomatium hooveri Rimo Bacigalupi 1950-4-16 3117 Colusa Bartlett Mt. Road, base of grade just W of Bear Valley, near Colusa-Lake County line 426 Comment
  UC765513  Lomatium hooveri R. F. Hoover 1941-5-2 4987 Colusa just e. Lake Co. line (on Williams-Clear Lake hwy.) Comment
  UCD110811  Lomatium hooveri Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  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
  UCD150867  Lomatium hooveri Clinton C. Shock 1980-5-3 73 Colusa Walker Ridge, 14.6 miles north of State Highway 20, at intersection with road to Bear Valley. 670 Comment
  CHSC42612  Lomatium macrocarpum Vernon Oswald 1986-3-25 1053 Colusa Fouts Springs Rd. (M10) at Diversion Dam Campground 3.4 mi w of Rd. 306. 411 Comment
  CHSC81209  Lomatium macrocarpum L. P. Janeway; Gail Kuenster 2001-3-27 6990 Colusa Vicinity of Sites, Lurline Creek, and Sulphur Gap. 384 Comment
  JEPS121106  Lomatium macrocarpum Lowell Ahart 2013-5-1 18676 Colusa On the N side of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  SEINET8693961  Lomatium macrocarpum R. R. Halse 2014-3-25 9033 Colusa Along the Leesville-Logoda Road ca. 5.6 mi S of Logoda; Indian Valley. 425 Comment
  UCD163700  Lomatium macrocarpum Craig Thomsen 1999-5-10 2009 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD58110  Lomatium macrocarpum Ellen Dean; G. Harrington and P. McIntyre 2007-3-16 3370 Colusa Payne Ranch. Along Hwy. 20, Destanella Flat area just E of Lake Co. border. Ca. 3.4 road miles west of junction with Hwy. 16. South side of road. South of Destanella. 548 Comment
  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
  CHSC77910  Lomatium marginatum var. purpureum Beth Hendrickson; Heidi West 1999-3-23 Colusa Vicinity of Sites and Stone Corral Creek. 121 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
  UC630428  Lomatium utriculatum Annetta Carter 1938-5-8 1387 Colusa 3 mi. n. Leesville (on Lodoga rd.); Inner N. Coast Range Comment
  UC875215  Lomatium utriculatum Lewis S. Rose 1936-4-27 36180 Colusa 11 mi. n.w. Rumsey Comment
  UCD56934  Lomatium utriculatum Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3536 Colusa BLM Payne Ranch. Southwest of intersection of Hwy 16 and Hwy 20. Thompson Canyon. 344 Comment
  UCD57818  Lomatium utriculatum Gordon Harrington 2007-4-17 30 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 527 Comment
  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
  UCR243135  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa Inner North Coast Range, 9 miles north of Hwy 20 on Bear Valley Road 405 Comment
  HSC47643  Lomatium utriculatum J. P. Smith, J. O. Sawyer 1978-4-29 9795 Colusa Bear Valley Rd., 5.9 mi. from its junction with Hwy. 20 366 Comment
  UCD40909  Lomatium utriculatum A. Bebensee 1984-4-21 6 Colusa 9 miles north of Hwy 20 on Bear Valley Road. About 100 yards into field on west roadside. Comment
  UCD40910  Lomatium utriculatum Kathi A. Zurakowski 1984-5-21 s.n. Colusa Bear Valley. 3.2 miles north of turnoff to Wilbur Springs. In field, west of road. 381 Comment
  UCD40913  Lomatium utriculatum Jim Mosby 1984-4-21 5 Colusa Bear Valley, 10 miles north on Bear Valley Road. 426 Comment
  CHSC116047  Lomatium vaginatum Richard R. Halse 2014-3-25 9028 Colusa Along the Sites-Logoda Road ca. 5.2 miles northwest of Sites. 175 Comment
  UCD67120  Lonicera involucrata Ellen Dean; Davis Botanical Society 2008-5-31 5053 Colusa west of I-5 at Maxwell, north slope of Goat Mountain, along Letts Valley Rd. between Goat Mountain Summit and Fouts Springs, east side of road. Comment
  JEPS108723  Lotus corniculatus Lowell Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA725013  Lotus corniculatus L. Ahart 2006-8-9 13129 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
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Aug 9 2017
  CAS-BOT-BC234977  Lotus grandiflorus Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6045 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 769 Comment
  RSA516411  Lotus grandiflorus var. mutabilis L. R. Heckard 1969-5-28 2233 Colusa On road above and west of Fouts Springs. Comment
  RSA138209  Lotus micranthus Volney Rattan 1884 Colusa Fonts Spring Comment
  UCD65955  Ludwigia hexapetala B. J. Grewell 2006-9-15 06- 67 -LU Colusa Colusa National Wildlife Refuge, south of Hwy 20, west of Colusa and Sutter Buttes. Glenn-Colusa Irrigation District West Lateral Canal at western refuge boundary, public auto tour route. 13 Comment
  JEPS81378  Lupinus adsurgens L. R. Heckard and J. C. Hickman 1982-7-8 5989 Colusa 1/4 mi sw East Peak (Snow Mt.); , sw of East Peak 2087 Comment
  UCD41127  Lupinus albifrons K. Arhangelsky 2002-3-28 146 Colusa Eastern foothills of inner north coast range, Capay Valley. Cache Creek Riparian Preserve. Comment
  CDA15481  Lupinus albifrons var. collinus G. F. Hrusa, WTD 1998-6-19 14618 Colusa North Coast Ranges; Along USFS Pacific Ridge Rd. (M5) above intersection with Goat Mtn. Rd. Comment
  CHSC62843  Lupinus albifrons var. collinus Vernon H. Oswald; Lowell Ahart 1994-3-23 6022 Colusa Little Stony Creek just W of Digger Pine Campground on Goat Mtn. Rd., S of Stonyford. 490 Comment
  HSC85823  Lupinus albifrons var. collinus David Munger, Tallchief Comet, Jeff Dunk 1987-4-12 77 Colusa Comment
  NY15769  Lupinus albipilosus A. A. Heller 1940-4-21 15543 Colusa Border of a field along U. S. Highway #99W, 2 miles south of Williams, in the Lower Sonoran LIfe Zone. Comment
  SEINET3271563 Image available Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley; on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 Comment
  UCD56899  Lupinus bicolor Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3502 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
  UCD64419  Lupinus bicolor Craig D. Thomsen 2000-4-12 2170 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
  UCD83718  Lupinus bicolor Joseph Schlottman; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  UCR206360  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley, on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 Comment
  HSC89739  Lupinus bicolor A. Eller, A. Smith, B. Hoffman 1989-4-15 20 Colusa Brim Rd., 3 mi. W of Bear Valley Rd. 457 Comment
  SEINET12164068  Lupinus densiflorus Unknown 1977-1 2 Colusa Salt Canyon, N side of Slat Crk, Hwy 20, 10 mi WSW Willilams. Wilbur Springs Quad. see comments 143 Comment
  HSC83318  Lupinus densiflorus var. aureus C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-29 34 Colusa Bear Valley, Bear Valley Rd. Comment
  RSA424727  Lupinus densiflorus var. aureus Aaron Liston, M. Blumler 1987-4-26 617 -1 Colusa 15.7 miles south of Stonyford. Lessville - Lodoga Road. Comment
  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
  RSA10440  Lupinus formosus var. robustus Carl B. Wolf 1928-5-8 2128 Colusa Sacramento Valley. 3 mi. south of Arbuckle Comment
  RSA0003424  Lupinus formosus var. robustus A. A. Heller, H. E. Brown 1908-5-20 s.n. Colusa Near College City. Comment
  CHSC84200  Lupinus luteolus Lowell Ahart 2003-7-14 10390 Colusa On the east and west side of Bear Valley Road, about 1/4 mile north of the intersection of Bear Valley Road and Wilber Springs Road and bridge. 379 Comment
  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
  SD27803  Lupinus menziesii Carl B. Wolf 1928-5-7 2121 Colusa 17 miles east of [Houghs] Springs on the road to Williams 456 Comment
  CHSC91128  Lupinus microcarpus var. densiflorus D. Isle 1997-7-31 334 Colusa Mendocino National Forest--North Coast Ranges. Bear Creek Watershed. S end of Bear Valley Rd. 243 Comment
  JEPS65094  Lupinus microcarpus var. densiflorus W. L. Jepson 1932-5-7 16264 Colusa valley above Venado; Venado (valley above) 304 Comment
  OBI56805  Lupinus microcarpus var. densiflorus Rhonda Riggins 1982-5-30 1448 Colusa Roadside Ladoga-Leesville Rd, 4.4 mi N Leesville 457 Comment
  UCR212341  Lupinus microcarpus var. microcarpus Craig D. Thomsen 2000-4-28 2199 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 2.80-3.00 310 Comment
  UCD33935  Lupinus nanus Beecher Crampton 1958-4-21 9166 Colusa 1 mile west of Lodoga. Comment
  RSA424766  Lupinus nanus var. apricus Aaron Liston, M. Blumler 1987-4-26 667 -9 Colusa Bear Valley - Lodoga Road, 6.6 miles S of Bartlett Springs Jct. Comment
  SD239748  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites. 92 Comment
  SEINET7096535 Image available Lupinus succulentus Richard R. Halse 2001-3-22 5947 Colusa Williams; along a vacant lot by 455 - 4th street. 39 9.52N 122 8.84W (Converted to decimal degrees). Elevation 18 m. 18 Comment
  UCR206293  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14735 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCR233449  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2011-4-1 17123 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  HSC89685  Lupinus succulentus Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 28 Colusa Bear Valley Rd. and Hwy. 20 intersection 305 Comment
  SEINET10489004  Lupinus succulentus Thomas W. Nelson, Jane P. Nelson 1978-4-2 Nelson 9550 Colusa Bear valley road, 1.3 mi from its jct with state route 20. Serpentine Chaparral with digger pine. 366 Comment
  HSC48193  Lupinus vallicola subsp. apricus Thomas W. Nelson, Jane P. Nelson 1978-4-29 3963 Colusa Along Bear Valley Rd., 2.5 mi. from junction with Hwy. 20 366 Comment
  JEPS80283  Luzula cascadensis L. R. Heckard and J. Hickman 1980-9-16 5457 Colusa Northeast slope West Peak, cirque area between peaks, Snow Mt. 2011 Comment
  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
  JEPS110112  Lythrum californicum Lowell Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA0014829  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  SBBG119884  Lythrum californicum L. Ahart 2006-8-9 13160 Colusa N side and under bridge across Stony Crk, just N of Stonyford 347 Comment
  UCD102989  Lythrum californicum Dick Johnson 1977-6-15 s.n. Colusa West of Williams rangeland. Comment
  CHSC86827  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren 1998-7-1 Colusa Vicinity of Sites, Golden Gate, Stone Corral Creek, and Funks Creek. Vernal pools. 103 Comment
  CHSC86838  Lythrum hyssopifolia Jenny Marr; Heidi West, Caroline Warren, Natalie Wight 1998-6-11 Colusa Vicinity of Funks Creek, Logan Ridge, Golden Gate, and Antelope Valley. 121 Comment
  UCR225655  Lythrum hyssopifolia Craig D. Thomsen, Gordon Harrington 2008-7-6 2773 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch, near ridge trail that follows the border of Colusa/Lake Counties. Dunsfield Flat stock pond 610 Comment
  CDA34965  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa Southeast end of East Park Reservoir, north of Lodoga. Comment
  CHSC84956  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  JEPS104406  Lythrum tribracteatum Lowell Ahart 2003-10-23 10667 Colusa On the e strand of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  OBI71983  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, Laura Fujii, Dawn Espindola 1989-10-21 8870 Colusa SE end of East Park Reservoir N of Lodoga 366 Comment
  SD211626  Lythrum tribracteatum Barbara Ertter, Elizabeth Neese, et al 1989-10-21 8870 Colusa Southeast end of East Park Reservoir North of Lodoga, narrow strand on shady substrate 366 Comment
  UC1191584  Lythrum tribracteatum Herbert L. Mason 1945-7-11 12645 Colusa 3 mi above Colusa (near Butte Creek, Butte Lodge Outing Club); Butte Lodge Outing Club Comment
  JEPS117019  Lythrum tribracteatum David Gowen 2008-5-24 925 Colusa West of Sites on north side of road. Comment
  JEPS80798  Madia elegans L. R. Heckard and J. C. Hickman 1981-7-30 5768 Colusa about 100 ft above on n side Trout Creek (se side of mountain); Snow Mt. 1554 Comment
  RSA718046  Madia elegans subsp. densifolia L. Ahart 2006-8-9 13095 Colusa On the south side of Stony Ceek, at Mine Camp, about 3.5 miles (air) west of Stonyford. 455 Comment
  UCR258102  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 s.n. Colusa Central Western; Inner North Coast Ranges, Bear Valley Rd., 9.5 miles north of Old Wilbur [Springs] Rd. turnoff 409 Comment
  RSA784858  Madia elegans subsp. elegans Bart O'Brien 1991-9-11 sn Colusa Bear Valley Rd, 9.5 mi N of Old Wilbur Rd turnoff 122 Comment
  CHSC101633  Madia gracilis David W. Isle; Rhonda Isle, Ann Isle 2003-5-15 1631 Colusa About 6 miles W of Stonyford; N aspect of serpentine chaparral slope S of M-10 (18N01.2) and just W of OHV Trail 30 (18N78) jct. On 8 August 2001 Trough Fire burn site. MDB and M. 585 Comment
  UCR206383  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14753 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  JEPS80125  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  JEPS83808  Madia gracilis L. R. Heckard with J. Hickman 1980-7-1 5283 Colusa just above trail entrance to roadless area (above Summit Springs) (Summit Springs to Frog Lake, Colusa-Lake Co. boundary, ca. 10 mi w of Stonyford); Snow Mt. 1645 Comment
  CDA8257  Madia hallii Vernon H. Oswald & Lowell Ahart 1998-5-7 9012 Colusa Bartlett Springs Road 2.8 miles west of Bear Valley Road, 0.1 mile east of Sawtelle Valley and Grapevine Flat Roads. Comment
  UCD159852  Madia hallii G. Ledyard Stebbins 1985-4-19 C 503 Colusa South end of Walker Ridge, along Walker Ridge Road, 0.25 miles northeast of its junction with road to Indian Valley Dam. (Note by label-maker: Section 12 is farther than 0.25 miles NE of road to Indian Valley Dam. Georeferenced this record in Section 13). Comment
  CAS-BOT-BC206317  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa Wash below the road near the foot of the grade east of Lodogo on the Sites-Lodogo Road Comment
  UC725449  Malacothamnus fremontii A. A. Heller 1940-6-7 15719 Colusa below the road near the foot of the grade e Lodoga; Sites-Lodoga road Comment
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Sep 25 2006
  UCD81897  Malacothamnus fremontii G. Harrington 2009-6-30 82 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. W side of Bear Creek on flat area above a steep bluff overlooking the creek. 233 Comment
  RSA32810  Malacothamnus helleri A. A. Heller 1940-6-7 s.n. Colusa Near foot of grade east of Lodogo, on Sites-Lodogo Road Comment
  CHSC79469  Malacothrix clevelandii B. Castro; L. P. Janeway 2000-5-2 1116 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UC768593  Malacothrix clevelandii R. F. Hoover 1938-4-24 3212 Colusa Upper Sand Creek Comment
  CAS-BOT-BC347385  Malacothrix floccifera Alice Eastwood; John Thomas Howell 1938-5-16 5635 Colusa Lake-Colusa Co. line on road to Williams Comment
  CHSC79470  Malacothrix floccifera B. Castro; L. P. Janeway 2000-5-4 1135 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC86522  Malacothrix floccifera B. Castro; Beth Hendrickson 2003-3-19 1393 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  HSC47459  Malacothrix floccifera J. P. Smith 1978-4-22 9745 Colusa Bear Valley Rd., 1.2 mi. from its junction with Hwy. 20 412 Comment
  JEPS36771  Malacothrix floccifera W. L. Jepson 1932-5-8 16292 Colusa n of Stonyford 365 Comment
  UC638648  Malacothrix floccifera Ethel Crum 1938-5-8 2039 Colusa 4 mi se Wilbur Springs; Inner North Coast Range Comment
  UCD132838  Malacothrix floccifera Beecher Crampton 1975-4-21 9164 Colusa 1.5 miles SE of Sites. Comment
  UCR261603  Malacothrix floccifera Ann Howald 2003-3-26 2295 Colusa Inner North Coast Ranges, Indian Valley, east side of East Park Reservoir, c. 3.1 miles north of Lodoga, near shore of reservoir 370 Comment
  UC18727  Malva nicaeensis J. Burtt Davy May, 1898 4276 Colusa near Willows Comment
  UC35242  Malva parviflora J. Burtt Davy May, 1898 4279 Colusa near Willows Comment
  CHSC84435  Malvella leprosa Lowell Ahart 2003-8-15 10507 Colusa Road (disked) that bordered rice field, on the south side of Highway 20, about 1 mile southwest of Williams. 27 Comment
  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
  CAS-BOT-BC361307  Marah watsonii Richard R. Halse 2013-3-26 8744 Colusa Along the Leesville-Logoda Road ca 5.5 miles S of Logoda, or 3.2 miles N of the junction of the Leesville and Bear Valley Roads; Indian Valley 426 Comment
  UCD164045  Marah watsonii Richard Philbrook 2016-4-9 3 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Just southwest of corral at junction of 16 and 20. Lower slopes of hill. 327 Comment
  UCD56943  Marah watsonii Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3545 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 342 Comment
  UCD66594  Marah watsonii Craig D. Thomsen 2000-4-28 2241 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
  UCD66689  Marah watsonii Craig D. Thomsen 2000-5-11 2319 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
  RSA63685  Marah watsonii Milo S. Baker 1947-4-6 11644 Colusa 1 mile E of Lake - Colusa boundary along hwy 20, Serpentine area. Comment
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CAS-BOT-BC67833  Marsilea vestita Roxana Stinchfield 1916-7-11 452 Colusa Colusa-Williams Road at the trough Comment
  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
  UCD72532  Medicago minima Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3823 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.5 mile downstream of bridge. 246 Comment
  SEINET3287499 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  UCR206895  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14361 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  POM276582  Medicago polymorpha Lyman D. Benson 1933-4-16 4337 Colusa 5 miles south of Arbuckle, Sacramento River Watershed, Sacramento Valley. 91 Comment
  UCD107925  Medicago sativa Beecher Crampton 1963-8-5 6873 Colusa 3.5 miles south of Grimes. 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
  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
  UCD86456  Melica californica Beecher Crampton 1958-4-21 4728 Colusa Colusa-Yolo Co. line: 7.4 miles northwest of Rumsey. Along State Hwy. 16. Junction Bear and Cache Creeks. Comment
  UCD87699  Melica californica Beecher Crampton 1958-5-19 4817 Colusa West of Lodoga. Comment
  CHSC100245  Melica harfordii D. Isle 1988-4-13 1508 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. West of Fouts Springs youth facility; Approx. 1 mile west of current gate on Rd to Bathhouse Trail; East of road and E of Trout Ck Trailhead; Within fenced exclosure burned during 1987 Fouts Fire. 609 Comment
  CHSC100265  Melica harfordii D. Isle 1988-4-13 1510 Colusa Mendocino National Forest - North Coast Ranges. Middle Fork Stony Creek Watershed. Mellow-D Ranch meadow just north of 1st bad erosion channel in area burned during 1987 Fouts Fire. 731 Comment
  JEPS80810  Melica harfordii L. R. Heckard and J. C. Hickman 1981-7-31 5783 Colusa Fouts Springs Overlook Snow Mt. (e side of Snow Mt.) 1813 Comment
  CHSC112269  Melica torreyana Lowell Ahart 2013-5-1 18692 Colusa Inner North Coast Range. Near a small drainage, north of the wash and State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD88843  Melica torreyana Beecher Crampton 1958-5-19 4816 Colusa West of Lodoga. Comment
  UCR206740  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2009-1-31 14320 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
  CHSC112256  Melilotus indicus Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18646 Colusa Inner North Coast Range. On the north side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  UCD57112  Melilotus indicus Gordon Harrington; Diana Hickson 2007-4-7 0024 Colusa Colusa Co. Ca. BLM Payne Ranch, SW intersection of Hwy 16 and Hwy 20, W of Roadkill Cafe, N of Thompson Creek. 434 Comment
  CHSC94289  Mentha canadensis Lowell Ahart 2006-8-9 13090 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  JEPS108913  Mentha canadensis Lowell Ahart 2006-8-9 13090 Colusa On the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford 455 Comment
  JEPS104403  Mentha spicata Lowell Ahart 2003-10-23 10666 Colusa Along Squaw Creek, just south of East Park Reservoir, ca 1/8 mi nw of Sites Lodoga Rd, ca 1 mi n of Lodoga, ca 21 mi w of Maxwell. 368 Comment
  CHSC75615  Mentzelia dispersa Vernon H. Oswald; Lowell Ahart 1999-6-22 9778 Colusa Lily Pond near upper Letts Lake west of Stonyford. 1243 Comment
  JEPS95646  Mentzelia dispersa Vernon H. Oswald and L. Ahart 1999-6-22 9778 Colusa Lily Pond near Upper Letts Lake west of Stonyford: T17N R8W Sect. 24, ca. 4080 ft, mixed coniferous forest 1243 Comment
  UC1051549  Mentzelia laevicaulis var. laevicaulis Helen K. Sharsmith 1953-6-21 4306 Colusa ca 1 mi within boundary of Mendocino National Forest (Slopes of Little Stoney Creek); Inner North Coast Ranges 670 Comment
  UC71777  Mentzelia laevicaulis var. laevicaulis H. P. Chandler 1905-10-17 Colusa Princeton Comment
  UCD163868  Micranthes californica Craig D. Thomsen 2001-4-12 2465 Colusa Bear Creek Canyon, first tributary above Sulphur Creek confluence with Bear Creek. About 3 miles north of Hwy 20. Comment
  UCD63030  Micranthes californica Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4682 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Eula Canyon. 313 Comment
  UCR261642  Micropus californicus Ann Howald 2003-4-23 2310 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, west of Coppermine Road, c. 0.05 mi north of intersection with East Ruby King Road 428 Comment
  UCR261673  Micropus californicus Ann Howald 2003-3-26 2292 Colusa Inner North Coast Ranges, Indian Valley, East Park Reservoir, Catholic Point peninsula, near Coppermine Road, c. 0.2 mi northwest of intersection with East Ruby King Road 417 Comment
  CDA32824  Micropus californicus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC79254  Micropus californicus var. californicus B. Castro; L. P. Janeway 2000-4-10 1065 Colusa Vicinity of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 106 Comment
  CHSC82608  Micropus californicus var. californicus Tara Morgan 2002-4-1 13 Colusa On the side of Bear Valley Rd. located northeast of Bear Creek south of Bear Valley. 350 Comment
  HSC40247  Micropus californicus var. californicus J. P. Smith, Thomas W. Nelson 1976-4-14 8584 Colusa Mendocino National Forest, confluence of Stony Creek and N Fork of Stony Creek. 427 Comment
  UC1049551  Micropus californicus var. californicus Rimo Bacigalupi 1950-4-16 3104 Colusa vicinity Colusa-Glenn County line (ridge above Red Bridge Camp and the confluence of the North amd Middle Forks of Stony Creek); Inner North Coast Ranges, Mendocino National Forest 579 Comment
  UCD82822  Micropus californicus var. californicus Craig Thomsen; G. Harrington 2009-5-12 2844 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  JEPS124230  Microseris douglasii subsp. douglasii Lowell Ahart 2015-4-1 19996 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
  UC133492  Microseris douglasii subsp. douglasii Katharine Brandegee April 1889 Colusa Leesville Comment
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Aug 28 2012
  UCD163885  Microseris douglasii subsp. douglasii Craig D. Thomsen 2002-4-10 2598 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
  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
  CAS-BOT-BC348830  Microseris douglasii subsp. douglasii K. Curran 1889-4-1 s.n. Colusa Unspecified Comment
  CHSC86524  Microsteris gracilis B. Castro; Beth Hendrickson 2003-3-19 1391 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 198 Comment
  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
  RSA46870  Mimulus aurantiacus var. aurantiacus Doris K. Kildale 1927-04 3244 Colusa [Unspecified] Comment
  JEPS80113  Mimulus breweri L. R. Heckard with J. Hickman 1980-7-1 5272 Colusa cirque se East Peak (ca. 10 mi w of Stonyford); Snow Mt. 1950 Comment
  JEPS108888  Mimulus cardinalis Lowell Ahart 2006-8-9 13157 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  RSA535823  Mimulus douglasii David M. Thompson 1988-3-28 860 Colusa 2.0 mi W of Bear Valley Road along Bartlett Springs Road. 0.25 mi W of a road culvert for a small stream. 534 Comment
  UCD122617  Mimulus douglasii Delanne Belshaw 1975-4-20 11 Colusa Bear Valley Road, 7.8 miles north of junction of State Highways 20 and 16. Comment
  JEPS110093  Mimulus floribundus Lowell Ahart 2006-8-9 13151 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS121117  Mimulus guttatus Lowell Ahart 2013-5-1 18688 Colusa N of the wash and Hwy 20, just E of Lake County line, 12.2 air miles ENE of the town of Clear Lake, 17.1 air miles W of Williams. Comment
  JEPS80382  Mimulus guttatus L. R. Heckard and J. Hickman 1981-6-22 5615 Colusa Dark Hollow Creek Snow Mt. 1889 Comment
  UCD82504  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2864 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82521  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2878 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  HSC96891  Mimulus layneae L. Ahart 2006-6-11 12664 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
  UC1051505  Mimulus layneae Helen K. Sharsmith 1953-6-20 4290 Colusa 5 mi beyond Trough Springs (on road to Goat Mountain); Inner North Coast Ranges, Mendocino National Forest 1280 Comment
  UC1212581  Mimulus layneae Francia Chisaki, Helen K. Sharsmith 1959-5-27 1338 Colusa about 1/4 mi e Cooks Spring; Inner North Coast Ranges, Cooks Creek Comment
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Nov 19 2007
  JEPS10504  Mimulus microphyllus W. L. Jepson 1932-5-7 16259 Colusa valley 1 mi above Venado 274 Comment
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Jun 15 2007
  JEPS80055  Mimulus microphyllus L. R. Heckard and J. Hickman 1979-6-15 5055 Colusa e trail from Frog Pond (cirque between e and w peaks); Snow Mt. 1981 Comment
  UCD81724  Mimulus nasutus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5728 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
  CDA41832  Mimulus pilosus L. Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. Comment
  JEPS120638  Mimulus pilosus Lowell Ahart 2013-10-1 19072 Colusa Strand of East Park Reservoir, about 2.5 air miles southeast of Stonyford, about 2.5 miles northwest of Lodoga, about 10 air miles northwest of Sites. Comment
  RSA724962  Mimulus pilosus L. Ahart 2006-8-9 13113 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  JEPS60201  Mimulus rattanii L. R. Heckard 1969-5-29 2237 Colusa about 6 1/2 air mi se Stonyford (along Trough Spring Ridge road, 0.2 mi n of its junction with Crackerbox Ridge road) 1127 Comment
  HSC45718  Minuartia douglasii Sheila Logan 1978-4-22 59 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCD164031  Minuartia douglasii Indya Messier 2016-4-9 5 Colusa BLM Bear Creek Ranch (previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. South of the corral at junction of 16 and 20, at the top of hill. 504 Comment
  JEPS61324  Mirabilis greenei W. L. Jepson 1932-5-8 16299 Colusa n of Stonyford (w Colusa County) 365 Comment
  UC903048  Mirabilis greenei Ethel Crum 1932-5-8 1454 Colusa Stonyford North Coast Ranges (southern extension of ranges) 426 Comment
  CAS-BOT-BC435026  Mollugo verticillata Edward Lee 1934-8-9 1010 Colusa Four miles north of Willows, Sacramento Valley Comment
  JEPS80807  Monardella odoratissima subsp. glauca L. R. Heckard and J. C. Hickman 1981-7-31 5779 Colusa East side Snow Mt. (Fouts Springs Overlook) 1798 Comment
  UCD70237  Monardella villosa D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  CHSC48492  Monardella villosa subsp. villosa Vernon Oswald 1986-6-30 2172 Colusa Fouts Spring Rd. (M10) at Candy Bucket Spring, 6.0 mi w of Rd. 306, 0.4 mi e of jct. John Smith Rd. (M5). 609 Comment
  CHSC94886  Monardella villosa subsp. villosa Lowell Ahart 2006-6-11 12672 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
  IRVC29847  Monardella villosa subsp. villosa Mark A. Elvin, David Isle, Mark S. Brunell 2006-8-3 4991 Colusa Mendocino Nat. Forest; E face of Snow Mtn., Stony Creek along M10. Southern Northern Inner Coast Ranges 610 Comment
  RSA724856  Monardella villosa subsp. villosa L. Ahart 2006-6-11 12672 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
  UC883639  Monardella villosa subsp. villosa A. A. Heller 1916-6-6 12355 Colusa Coast Range on the grade about 3 miles west of Leesville Comment
  UCD81712  Monardella villosa subsp. villosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5718 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  CAS-BOT-BC349575  Monolopia major Ethel Crum 1938-5-8 2035 Colusa Bear Valley, four miles south of Leesville 426 Comment
  JEPS34930  Monolopia major Alice King May 1906 Colusa College City Comment
  JEPS35220  Monolopia major Ruth Johnson 1915-4-6 Colusa College City Comment
  UC1484326  Monolopia major G. Hannan 1977-4-22 204 Colusa 12.4 mi n CA Hwy 20 (between Clearlake Oaks and Williams, 1.6 mi s of Brim Rd.) 411 Comment
  UC90430  Monolopia major K. Brandegee April 1889 Colusa Comment
  UCD82631  Muhlenbergia asperifolia Jack Alderson 2009-8-6 27 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of junction of Hwys 16 and 20. Near confluence of Craig and Bear Creeks. 304 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
  CHSC77974  Muhlenbergia rigens Beth Hendrickson; Natalie Wight, Heidi West 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 106 Comment
  UC719170  Muilla maritima F. G. Meyer 1938-4-5 1346 Colusa in meadow about 20 mi n Williams Comment
  CAS-BOT-BC83271  Myosurus minimus Roxana S. Ferris 1917-4-10 507 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83273  Myosurus minimus Roxana S. Ferris 1918-4-10 1443 Colusa 4 miles east of Williams. Comment
  CAS-BOT-BC83277  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83283  Myosurus minimus James Jokerst 1986-5-6 2300 Colusa Near Lurline Creek. 41 Comment
  UC1738123  Myosurus minimus D. E. Stone 1955-5-2 7 -13 Colusa 3 mi E of Maxwell ( on Maxwell Rd.) Comment
  UCD18836  Myosurus minimus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 143 Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  CAS-BOT-BC83281  Myosurus minimus Alice Eastwood 1922-4-24 11188 a Colusa Road between Princeton and Norman. Colusa/Glenn county line. Comment
  UCD81889  Najas gracillima Ellen Dean; Bear Creek Ranch Grazing Committee 2009-6-19 5773 Colusa BLM Bear Creek (formerly Payne) Ranch. Lands to the SW of the junction of Hwys 16 and 20. Central part of ranch at large stock pond. 492 Comment
  UC1100016  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 mi w of Colusa (on Williams Highway by bridge) Comment
  POM312984  Najas guadalupensis H. L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 miles west of Colusa on Williams highway by bridge Comment
  UCD87419  Nassella cernua Beecher Crampton 1958-5-19 4790 Colusa 10.7 miles southeast of Leesville. 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
  UCD57863  Nassella pulchra Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 48 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
  UCD87475  Nassella pulchra Beecher Crampton 1958-4-21 4732 Colusa Along State Hwy. 16. 12 miles northwest of Rumsey. Comment
  UCD81229  Navarretia Ellen Dean; K. Mawdsley, B. Rice, G. Harrington, and J. Alderson 2009-5-6 5566 Colusa Payne Ranch, lands to the SW of the jct. of Hwys. 16 and 20. Destanella Flat area on the S side of Hwy. 20. West side of Destinella Flat. 446 Comment
  CAS-BOT-BC230252  Navarretia cotulifolia A. A. Heller 1916-6-9 12388 Colusa Coast Range about 2 miles W of Leesville Comment
  JEPS70256  Navarretia cotulifolia W. L. Jepson 1920-5-23 8965 Colusa near Leesville (foot of Bartlett Grade, w side of Bear Valley); Bear Valley, Bartlett Grade 426 Comment
  CHSC72457  Navarretia divaricata subsp. vividior L. P. Janeway; David Isle 1998-7-3 5711 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
  CHSC86970  Navarretia heterandra B. Castro 2003-5-14 1431 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. At lower end of SE-trending ridge, on west edge of Sacramento Valley. 140 Comment
  CHSC88525  Navarretia heterandra B. Castro 2003-5-15 1440 Colusa Vicinity of Logan Ridge, Sulphur Gap and Lurline Creek. On N-facing side of small 'pass' in unnamed tributary to Lurline Ck. 195 Comment
  JEPS81285  Navarretia intertexta L. R. Heckard and J. C. Hickman 1982-7-5 5896 Colusa Summit Springs, south side of Snow Mt. 457 Comment
  JEPS80209  Navarretia intertexta L. R. Heckard and J. C. Hickman 1980-7-3 5363 Colusa Across road (north of) from Summit Springs, southwest slope of Snow Mt. 1548 Comment
  SEINET197559  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Mendocino National Forest; Black Diamond Ridge. 610 Comment
  UC142967  Navarretia jepsonii Katharine Brandegee 1910-8-10 Colusa near Eppersons (sw Colusa County); Bear Valley Comment
  UC1552812  Navarretia jepsonii Frederica Bowcutt 1985-6-20 607 Colusa n of Hwy. 20; Walker Ridge Comment
  UCD164150  Navarretia jepsonii Craig Thomsen 2000-5-12 2328 Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  RSA537266  Navarretia leptalea P. H. Raven, Richard Snow 1959-9-11 14421 Colusa Openings in forest of Pinus ponderosa, Dark Hollow Creek. 1860 Comment
  CHSC107942  Navarretia leucocephala subsp. leucocephala B. Castro; L. Janeway 2011-4-27 1866 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 0.3 mi northeast of Tehama-Colusa Canal. At SW end of vernally moist swale which extends northeast of large +- saline/alkaline wetland/ marsh, in drying vernal pool bottom. 48 Comment
  CHSC112918  Navarretia nigelliformis subsp. nigelliformis B. Castro; Robin Carter, Amy Lyons 2010-5-13 1807 Colusa Vicinity of Golden Gate in Logan Ridge, Road 69 and the Tehama-colusa canal, in disturbed, grazed annual grassland. 121 Comment
  CAS-BOT-BC233594  Navarretia pubescens J. Clausen 1935-5-20 1014 Colusa 18 miles W of Williams on Bartlett Springs Road Comment
  UCD82118  Navarretia pubescens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5646 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
  CHSC89877  Navarretia tagetina B. Castro; L. Janeway, S. Innecken 2001-5-9 1246 Colusa Vicinity of Grapevine Creek, Antelope Creek, and Pence Mtn. Along dirt road paralleling N-S-trending perennial creek. 365 Comment
  UC726846  Navarretia viscidula A. A. Heller 1940-6-7 15812 Colusa 3 mi s Stonyford Comment
  JEPS22942  Nemacladus capillaris Volney Rattan 1884-1 Colusa above Stony Creek 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
  UCD81730  Nemacladus capillaris Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5732 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  UCR78370  Nemacladus capillaris Barbara Ertter 1989-7-1 8599 Colusa road to Goat Mtn Lookout, 2.2 mi. south of Route M-10 (Bear Creek - Fouts Spring Road) at head of S Fork of Stony Creek, c. 12 air mi. WSW of Stonyford 1500 Comment
  CHSC76510  Nemacladus montanus Heidi West; Caroline Warren 1998-5-26 Colusa Vicinity of Antelope Valley, Huffmaster Road, and Sites. 152 Comment
  UCD82389  Nemophila Craig Thomsen; G. Harrington 2009-5-12 2831 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
  CHSC77936  Nemophila heterophylla Beth Hendrickson; Jean Witzman 1999-4-21 Colusa Vicinity of Antelope Valley and Sites. 137 Comment
  SBBG126069  Nemophila heterophylla G. K. Helmkamp with E. A. Helmkamp 2009-3-11 14372 Colusa St Hwy 20, 14.3 mi SW of Williams 375 Comment
  SD237466  Nemophila heterophylla G. K. Helmkamp, E. A. Helmkamp 2009-3-11 14372 Colusa Inner North Coast Range Foothills: along CA-20, 14.3 miles southwest of Williams. (Salt Canyon 7.5'Q) 374 Comment
  RSA537462  Nemophila parviflora var. parviflora Barbara Ertter 1989-7-1 8614 Colusa Road to Goat Mountain Lookout 1.7 miles S of Rt. M-10 (Bear Creek-Fouts Spring Road) at head of S Fork Stony Creek, ca. 12 airmiles WSW of Stonyford. 1463 Comment
  RSA0000499  Neostapfia colusana Jos Burtt Davy 1898-05 s.n. Colusa Near Princeton. Comment
  JEPS87760  Nicotiana glauca Vernon H. Oswald and Lowell Ahart 1994-3-23 6024 Colusa 1.8 mi w Stonyford-Lodoga Rd. (Goat Mtn Rd, s of Stonyford, between the road and Little Stony Creek) 487 Comment
  RSA730238  Nicotiana glauca Richard R. Halse 2007-3-25 7123 Colusa Along State Hwy 20, ca 7.8 miles northeast of its junction with State Hwy 16, at base of Salt Canyon. (WGS84) 100 Comment
  UC199530  Nicotiana quadrivalvis H. M. Hall 1917-4-29 10286 Colusa 5 mi n Colusa (Sacramento River banks); Sacramento River 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
  CHSC71441  Orobanche californica subsp. jepsonii Vernon H. Oswald; Lowell Ahart 1998-7-15 9274 Colusa Bartlett Springs Rd. 2.1 mi west of Bear Valley Rd., 0.8 mi east of Sawtelle Valley and Grapevine Flat roads. Along the edge of a meadow. 524 Comment
  UC71766 Image available Orobanche californica subsp. jepsonii H. P. Chandler Oct 1905 Colusa Princeton. Comment
  SEINET8854072 Image available Orobanche grayana var. jepsonii H. P. Chandler 1905-1 s.n. Colusa Princeton Comment
  JEPS81407  Orobanche pinorum L. R. Heckard and J. C. Hickman 1982-7-9 6014 Colusa Colusa-Lake County Boundary: Near junction of Horse Glade along road to Lookout, Goat Mt. Comment
  RSA402037A  Orthocarpus lithospermoides Jens Clausen 1935-5-20 1018 Colusa Ca. 27 mi W of Williams after having passed the Wilbur Springs road. Along Bear Creek. Comment
  RSA516500  Orthocarpus lithospermoides var. bicolor W. L. Jepson 1938-6-9 18964 Colusa Mts. between Indian Valley and Bear Valley. Btw. Lake Co. and Colusa Co. Comment
  UCD88428  Oryza rufipogon P. B. Kennedy 30-31 May 1922 s.n. Colusa Cortina. Comment
  JEPS80775  Osmorhiza berteroi L. R. Heckard and J. C. Hickman 1981-7-30 5748 Colusa Trout Creek trail Snow Mt. (se slope of mt.) 1645 Comment
  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
  CHSC88565  Packera clevelandii L. P. Janeway; B. Castro 2001-6-3 7103 Colusa Inner North Coast Ranges. At Buck Flat: east side of Walker Ridge at head of Gaither Canyon; about 1.3 km south-southeast of Baldy Mountain. Meadow. 872 Comment
  CHSC70785  Packera eurycephala var. eurycephala B. Castro; D. Isle, L. Hanson, L. Janeway 1995-4-28 565 A Colusa Stonyford area, along the west bank of Salt Creek, beginning ca 20 yds N of Dennis Drive, extending into fenced field to the W and into property to the N of field. 371 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
  UC1299444  Packera greenei Freed W. Hoffman 1947-6-19 1670 Colusa Cooks Springs, w Colusa County North Coast Ranges Comment
  UCD89786  Panicum capillare subsp. hillmanii Beecher Crampton 1969-6-18 8457 Colusa 1.5 miles south of Williams. Interstate Hwy. 5 northbound. Comment
  CAS-BOT-BC253936  Parapholis incurva A. A. Beetle 1942-5-21 3271 Colusa 12 miles N of Williams Comment
  CHSC86779  Parapholis incurva 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
  SEINET238367 Image available Parapholis incurva Beecher Crampton 1953-4-29 1143 Colusa 2 miles east of Maxwell. Comment
  UCD88625  Parapholis incurva Beecher Crampton 1958-5-19 4825 A Colusa 4 miles south of Maxwell, along U.S. Highway 99W. 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
  UC1027193  Parvisedum pentandrum Herbert L. Mason 1953-5-4 Colusa Little Stony Creek Road 0.25 mi above junction of Little Stony Creek and Trout Creek (Inner North Coast Ranges); , Little Stony Creek Road 609 Comment
  UCD67080  Paspalum distichum Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5104 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  UCR225658A  Paspalum distichum Craig D. Thomsen, Gordon Harrington 2008-7-6 2780 Colusa BLM Payne Ranch, lands to the southwest of the junction of Hwys 20 and 16. Western edge of ranch on ridge above Cache Creek Canyon, along ridge trail 511 Comment
  JEPS87668  Pectocarya pusilla Vernon H. Oswald and Lowell Ahart 1994-4-6 6071 Colusa s. Stonyford (Goat Mtn. Road 0.8 mi s. of Sullivan Creek Bridge, sw of Digger Pine Flat) 487 Comment
  UCD110808  Pedicularis densiflora Christopher Mallek 2008-1 s.n. Colusa Pacific Ridge. Border of Colusa and Lake Counties. 1101 Comment
  UCD66581  Pediomelum californicum Craig D. Thomsen 2001-5-24 2526 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
  CHSC43542  Pellaea andromedifolia Lowell Ahart 1976-11-14 1003 Colusa About 3 miles west of Sites. 365 Comment
  JEPS86609  Pellaea brachyptera L. R. Heckard with P. C. Silva, R. L. and M. Moe 1988-6-19 6713 Colusa 0.5 mi. n.e. Summit Springs (s.w. flank of Snow Mt.); Colusa-Lake Co. Line, Snow Mt. 1650 Comment
  HSC44460  Pellaea mucronata R. York 1978-4-22 130 Colusa Bear Valley Rd. 1.5 mi. from its jct. with Hwy. 20 412 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
  POM231095  Penstemon heterophyllus subsp. purdyi Jens Clausen 1935-5-20 1015 Colusa 18 mi W of Williams on Bartlett Springs Road. Past the Stonyford road. Comment
  CHSC84198  Penstemon heterophyllus var. purdyi Lowell Ahart 2003-7-14 10386 Colusa By a wash, on the east side of Bear Valley Road, about 3 miles northwest of Highway 20. 381 Comment
  UCD70233  Penstemon laetus subsp. sagittatus D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. Serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  UC71631  Pentachaeta exilis subsp. exilis Miss Alice King 1905-1 Colusa College City Comment
  UCD63128  Perideridia kelloggii Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4958 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
  JEPS80375  Perideridia oregana L. R. Heckard and J. Hickman 1981-6-22 5608 Colusa East Peak Snow Mt. (s side of e ridge) 1950 Comment
  CHSC112625  Persicaria lapathifolia Lowell Ahart 2013-10-1 19090 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC94459  Persicaria punctata Lowell Ahart 2006-8-9 13133 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  UCD72534  Petrorhagia dubia Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3825 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. West side of Bear Creek, ca. 0.5 mile downstream of bridge. 246 Comment
  CDA16099  Phacelia corymbosa G. F. Hrusa 1999-5-16 15044 Colusa North Coast Ranges; above Fouts Springs. 594 Comment
  JEPS95504  Phacelia distans Vernon H. Oswald and L. Ahart 1994-3-23 6021 Colusa T16N R7W NE1/4 NW1/4 Sec. 1, 1660 ft, Chaparral. Goat Mtn. Rd. just W of the bridge over Sullivan Creek, S of Stonyford 505 Comment
  RSA0021579  Phacelia distans M. Bourell 1997-3-29 5807 Colusa Mendocino National Forest along Road near Brittan Ranch, 0.1 mi. N of North Fork Campground. Comment
  UCD63016  Phacelia divaricata Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4668 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Slopes to the NW of Cowboy Camp on the west side of Bear Creek. 358 Comment
  UCD64438  Phacelia divaricata Craig D. Thomsen 2000-4-4 2071 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  CHSC32215  Phacelia egena James Jokerst 1980-8-6 1058 Colusa Near Snow Mountain (West). Comment
  UC73693  Phacelia egena Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  JEPS80874  Phacelia heterophylla subsp. virgata L. R. Heckard and J. C. Hickman 1980-7-3 5373 A Colusa near Summit Springs (sw slope); Snow Mt. 1554 Comment
  UCD57821  Phacelia imbricata Gordon Harrington 2007-4-17 32 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 552 Comment
  CHSC60747  Phacelia imbricata subsp. imbricata Vernon H. Oswald; Lowell Ahart 1993-5-27 5430 Colusa Sites-Lodoga Rd. ca. 0.4 mi W of Grapevine Pass (4.6 road mi E of Lodoga). 481 Comment
  UCR233441  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 miles southeast of Sites 93 Comment
  CAS-BOT-BC265957  Phalaris minor Roxana S. Ferris 1926-4-22 6287 Colusa 3 miles west of Colusa Comment
  SEINET10657421  Phalaris minor Roxana S. Ferris 1917-4-12 Ferris 508 Colusa 4 mi. east of Williams; Alkali Plains Comment
  JEPS71082  Phlox gracilis W. L. Jepson 1932-5-8 16276 Colusa Lodoga, w Colusa Co Lodoga 457 Comment
  JEPS71108  Phlox gracilis Alice King May 1906 Colusa College City Comment
  SEINET11587800  Phlox gracilis Unknown 2009-3-11 14370 Colusa Williams 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
  JEPS21852  Phoradendron densum John R. Swanson 1958-4-26 323 Colusa 2.8 mi. w. Bear Valley rd. (near Colusa-Lake Co. boundary, on rd. to Bartlett Springs) 670 Comment
  RSA0115434  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the junction with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian. 20 Comment
  CHSC88597  Phragmites australis L. P. Janeway; B. Castro 2001-6-3 7098 Colusa Inner North Coast Ranges. Spring at Grapevine Flat, on top of Walker Ridge about 0.8 km east of Baldy Mountain. 884 Comment
  UCD125937  Phyla nodiflora Collector Unknown Date Unknown s.n. Colusa Exact location unknown. Comment
  CHSC80450  Physalis lancifolia Caroline Warren; Jenny Marr, Heidi West 1998-7-1 Colusa Vicinity of Peterson Road and Funks Creek. 91 Comment
  JEPS101225  Physalis lancifolia Dean W. Taylor 1989-8-4 10419 Colusa Colusa National Wildlife Refuge, along Ohm Road 39 Comment
  UC1561070  Physalis lancifolia Dean W. Taylor 1989-8-4 10419 Colusa Colusa National Wildlife Refuge Great Central Valley (along Ohm Road) 39 Comment
  UCD80817  Pickeringia montana Ellen Dean, G. Harrington; K. Mawdsley, C. Thomsen, G. Walden, E. McDermott 2009-3-18 5273 Colusa BLM Bear Creek (Payne) Ranch, lands to the SW of the jct of Hwys 20 and 16. E-facing slope above Eula Canyon. Between the headwater areas of Craig and Eula Canyons. 528 Comment
  CHSC105195  Pickeringia montana var. montana B. Castro; L. P. Janeway 1999-7-5 1017 Colusa Ca 11 air mi SSW of Stonyford, 5 mi NW of Indian Valley Reservoir, just N of Colusa/Lake Co line, near Bear Wallow Spring. In serpentine substrate on gentle N-facing slope along N edge of USFS Rd 16N06, near top of Pacific Ridge. 1127 Comment
  CAS-BOT-BC76959  Pilularia americana G. Thomas Robbins; S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  CAS-BOT-BC72814  Pinus sabiniana Roxana S. Ferris 1917-4-14 578 Colusa Arbuckle-Rumsey road, 7 mi. west of Arbuckle foothills. Comment
  CDA580  Pinus sabiniana G. D. Barbe, T. C. Fuller 1986-3-6 4259 Colusa Steep bank below road grade, Leesville Grade, W of Williams. 0 Comment
  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
  UCD72540  Piptatherum miliaceum Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3831 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. East side of Bear Creek, just south of BLM parking lot (ca. 10 miles). 252 Comment
  CHSC107949  Pisum sativum B. Castro; T. Boullion 2011-4-20 1847 Colusa Sacramento Valley. Extreme W edge of Sacramento Valley; ca 5 air mi NW of Maxwell, 0.8 mi SE of Funks Reservoir and 0.3 mi east of bend in Tehama-Colusa Canal. In grassy uplands north of large +- saline/alkaline wetland/marsh and associated vernal swales, just south of east-west fence bordering grain fields. 49 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
  CHSC86878  Plagiobothrys canescens B. Castro 2003-3-28 1406 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 256 Comment
  UC71656  Plagiobothrys canescens Miss Alice King 1905-4-7 Colusa College City Comment
  UCD57558  Plagiobothrys canescens Stephanie Castle; with Plant Biology 102 2007-4-29 1 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Meadow on the west side of State Route 16, ca. 2 road miles south of intersection with State Route 20. West side of Bear Creek, north of Craig Creek. 304 Comment
  SFV3146  Plagiobothrys canescens A. Ongun 1961-4-16 37 Colusa Bear Valley, 8 miles north of State Highway 20. Just south of wooden bridge. 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
  UC78083  Plagiobothrys fulvus var. campestris Katharine Brandegee April, 1889 Colusa Colusa Junction Comment
  UCD163690  Plagiobothrys fulvus var. campestris Craig Thomsen 1999-4-15 1992 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CHSC112920  Plagiobothrys greenei B. Castro; L. Janeway, Robin Carter 2010-3-23 1804 Colusa Vicinity of Golden Gate in Logan Ridge, Funks Reservoir, and the Tehama-Colusa canal in disturbed, grazed annual grassland. 121 Comment
  SD180603  Plagiobothrys leptocladus Carol Witham, Jennifer Buck 2001-4-30 151 A Colusa 2.0 miles south of the town of Colusa along Highway 20, east of Highway 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001. Comment
  UCD18843  Plagiobothrys leptocladus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-30 151 A Colusa 2 mi. south of the town of Colusa along Hwy 20, east of Hwy 20 and the Colusa Airport, Dolan Ranch site, pool # DOL001, UTMs: 10S0587786; 4336302. Comment
  JEPS80194  Plagiobothrys nothofulvus L. R. Heckard and J. Hickman 1980-7-3 5347 Colusa ca 10 mi w Stonyford (just w of Summit Springs, sw of Snow Mt., Colusa-Lake County boundary) 1548 Comment
  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
  CDA32833  Plagiobothrys stipitatus P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  POM287611  Plagiobothrys stipitatus Lyman Benson 1935-3-27 6340 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  CHSC115340  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-10 20006 Colusa Large size plant, on damp dark soil, along the south edge of Leesville Road. 445 Comment
  CHSC77923  Plagiobothrys stipitatus var. micranthus Beth Hendrickson; Natalie Wight, Heidi West 1999-3-25 Colusa Vicinity of Antelope Valley and Sites. 121 Comment
  JEPS123890  Plagiobothrys stipitatus var. micranthus Lowell Ahart 2015-4-28 20115 Colusa About 5 1/2 miles east of Maxwell. Comment
  POM63664  Plagiobothrys stipitatus var. micranthus Roxana S. Ferris 1917-4-12 534 Colusa 4 miles east of Williams. Comment
  SEINET3287497 Image available Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14359 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  UCD18900  Plagiobothrys stipitatus var. micranthus Vernal Pool Team 2001; Carol Witham and Jennifer Buck 2001-4-17 151 B 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: 10S0587286; 4336302. Comment
  UCD63008  Plagiobothrys stipitatus var. micranthus Ellen Dean; C. Thomsen, N. Voegtly, J. Alderson, G. Harrington 2008-3-30 4661 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20. 319 Comment
  UCR206851  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14359 Colusa Sacramento Valley, along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge 15 Comment
  UCR212317  Plagiobothrys stipitatus var. micranthus Craig D. Thomsen 2000-4-12 2096 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
  CDA11408  Plagiobothrys stipitatus var. stipitatus G. F. Hrusa, K. van Katwyk 1995-4-22 12129 Colusa Inner North Coast Ranges; along roadside in Bear Valley. 15 m. N of Hwy. 20. Comment
  CHSC29720  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-1 6617 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  CHSC55678  Plagiobothrys stipitatus var. stipitatus K. R. Stern 1980-4-3 6623 Colusa North central portion of Delevan National Wildlife Refuge. 45 Comment
  CHSC86873  Plagiobothrys stipitatus var. stipitatus B. Castro; Beth Hendrickson 2003-4-7 1416 Colusa Vicinity of Sites, Antelope Valley, and Salt Lake. 94 Comment
  UCR212375  Plagiobothrys stipitatus var. stipitatus Ellen Dean, Craig D. Thomsen, N. Voegtly, J. Alderson, Gordon Harrington 2008-3-30 4662 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Near corral on west side of Bear Creek just south of Hwy 20 320 Comment
  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
  CAS-BOT-BC60828  Planodes virginica L. R. Abrams 1928-5-8 12590 Colusa 2 miles south of Arbuckle. Comment
  CHSC79538  Plantago coronopus L. P. Janeway; B. Castro 2000-3-23 6637 Colusa Vicinity of Funks Creek and Glenn-Colusa Canal. 47 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
  CHSC107956  Plantago elongata B. Castro; T. Boullion 2011-4-20 1839 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 5 air mi NW of Maxwell, 0.8 mi southeast of Funks Reservoir and 650 ft northeast of Tehama-Colusa Canal. Off northwest corner of large +- saline/alkaline wetland/marsh, scattered in marsh edges, vernally moist flats, vernal pools and edge of large bald patch of bare whitish soil. 49 Comment
  JEPS20847  Plantago elongata B. Crampton 1953-4-29 1147 Colusa about 3 mi e Maxwell Comment
  RSA783305  Plantago elongata R. R. Halse 2010-3-20 7828 Colusa Williams. By junction of 5th Street and B Street. 25 Comment
  UC102743  Plantago elongata T. S. Brandegee Apr 1889 Colusa Colusa Junction 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
  CHSC57195  Plantago erecta John Griffish 1980-4-16 6 Colusa Ca. 7 mi s of Stonyford. 401 Comment
  CHSC59997  Plantago erecta Linda A. Bell 1975-4-19 44 Colusa Bear Valley Road, 1 mile north of State Highway 20. Comment
  CHSC81283  Plantago erecta J. Trizzino 2001-3-31 18 Colusa Bear Valley Meadow along east side of Bear Balley Road. 396 Comment
  CHSC86027  Plantago erecta Jenny Marr; H. West, J. Lacey, C. Warren, N. Wight 1998-4-14 Colusa Vicinity of Grapevine Creek, Antelope Valley, and Sites-Lodoga Road. Pasture. 121 Comment
  JEPS120973  Plantago erecta Lowell Ahart, John Dittes, Josephine Guardino 2013-4-26 18632 Colusa On N side of Hwy 20, just E of Lake County Line, 12.2 air miles ENE of town of Clear Lake, 17.1 air miles W of Williams. Comment
  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
  POM61338  Plantago erecta Roxana S. Ferris 1917-4-12 496 Colusa 4 miles east of Williams. Comment
  UC76647  Plantago erecta Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD56910  Plantago erecta Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3513 Colusa BLM Payne Ranch. In Craig Canyon. Southwest of intersection of Hwy. 16 and Hwy. 20. 326 Comment
  HSC16823  Plantago erecta M. Dole 1963-4-15 71 Colusa 1 mi. S of the junction of Hwys. 16 and 20, on Hwy. 16 Comment
  UCD124495  Plantago erecta J. M. Tucker 1960-4-3 3583 Colusa 1/4 mile west of road, 7.5 miles above State Highway 20, Bear Valley (Wilbur Springs) Road. Comment
  CHSC19695  Platystemon californicus L. A. Wright Jr. 1971-3-27 16 Colusa W side of Hwy 20, ca. 1 mi nw of junc of Hwy 16 and 20. 243 Comment
  CHSC59996  Platystemon californicus Robert Robichaux 1975-4-20 43 Colusa Wilbur Springs Road, ca. 6 miles southwest of Barrel Springs. Comment
  CHSC81294  Platystemon californicus J. Trizzino 2001-3-31 19 Colusa Bear Valley Meadow along east side of Bear Valley Road near creek. 396 Comment
  SEINET12091628  Platystemon californicus C. L. Eddy 1984-1 5 Colusa Ca 0.3 mi W of jct of Hwys 20 and 16, S side of Bear Creek, ca 16 m SW of Williams. Wilbur Springs 322 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
  UCD13217  Platystemon californicus Steve Daniel 1986-4-13 10 Colusa California. Colusa Co. Bear Valley, 7.6 mi No of jct of Bear Valley Rd. and hwy 20. Elev. ca. 1300 ft. 396 Comment
  UCD82340  Platystemon californicus Robin McMaster 1973-4-15 326 Colusa Bear Valley. Comment
  POM158154  Platystemon californicus var. californicus Lyman Benson 1935-3-27 6335 Colusa 2 mi W of Williams. Inner N Coast mtn range, Sacramento River watershed. 122 Comment
  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
  RSA604107  Platystemon californicus var. californicus Steve Daniel 1986-4-13 10 Colusa Bear Valley, 7.6 miles N of junction of Bear Valley Road and Highway 20 396 Comment
  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
  SEINET5742209 Image available Plectritis ciliosa Gene R. Williams 1961-1 27 Colusa In Bear Valley, 8.4 miles north of turnoff from State Hwy 20.; Bear Valley Comment
  JEPS87663  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
  UC1018914  Plectritis ciliosa subsp. ciliosa S. C. Dyal, A. Carter, E. Crum 1938-5-7 712 Colusa Colusa County Comment
  UCD81235  Plectritis congesta subsp. brachystemon Barry Rice; E. Dean, G. Harrington, J. Alderson, M. Bibbo 2009-3-25 s.n. Colusa Bear Creek (formally Payne) Ranch. Lands to the SW of the jct of Hwys 20 and 16. Southern part of the ranch on the south side of a canyon that is immediately north of Brophy Canyon. 274 Comment
  CDA13785  Plectritis macrocera G. F. Hrusa, K. van Katwyk 1995-4-22 12138 A Colusa Inner North Coast Ranges; S side of Leesville Rd. approx. 3 mi. N of Hwy 20, flowers near white. Comment
  JEPS16087  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  JEPS16219  Plectritis macrocera Rimo Bacigalupi, Arthur Holmgren 1950-4-26 3171 Colusa 7.7 mi w of Sites (Grapevine Grade to Lodoga) Comment
  JEPS95488  Plectritis macrocera Vernon H. Oswald and L. Ahart 1994-4-6 6067 A Colusa T17N R7W SE1/4 SW1/4 Sec. 36, 1540 ft, Chaparral. Goat Mtn. Rd. at Sullivan Creek, 1.2 mi SW of Digger Pine Flat, S of Stonyford 469 Comment
  UCD13382  Plectritis macrocera Charles Martin 1986-5-17 33 Colusa Mendocino National Forest. Mill Valley Campground. 3.2 miles south of junction w/ forest service Rd. 18NO1 on Forest Service Rd.17 NO2. Comment
  POM204747  Poa annua A. A. Heller, H. E. Brown 1902-5-2 7449 Colusa Princeton. Comment
  CDA2384  Poa bulbosa M. H. Handley 1963-5-1 Colusa Sites. 0 Comment
  JEPS124236  Poa bulbosa Lowell Ahart 2015-4-1 19991 Colusa Inner North Coast Range. 1/2 mile east of Lake County Line, 12 miles (air) east-northeast of Clear Lake (town), 17 miles (air) west of Williams. Comment
  UCD160062  Poa bulbosa James A. Neilson Jr. 1975-4-29 s.n. Colusa two miles south of Stonyford. (Exact location unknown. (Elevation and coordinates estimated by label maker.) 365 Comment
  UCD57879  Poa bulbosa Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 54 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. About 250 feet north of Road Kill Cafe in flat meadow-pasture area. 385 Comment
  UCD97127  Poa bulbosa Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6911 Colusa Along Bear Valley Road at the Cal Fire station. 335 Comment
  UCD84517  Poa pratensis Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6068 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road. Buck Flat. 872 Comment
  UCD163705  Poa secunda Craig Thomsen 1999-5-10 2017 Colusa Bear Valley. About 9 miles north of Hwy 20. 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
  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
  UC883695  Pogogyne douglasii A. A. Heller 1916-6-9 12387 Colusa Coast Range about 2 miles west of Leesville Comment
  CHSC107975  Pogogyne zizyphoroides B. Castro; Robin Carter, Jessica Boyt 2011-4-25 1858 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; ca I mi southeast of Funks Reservoir and 0.2 mi northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. In vernal pool in compacted E-W road track that goes through marsh. 49 Comment
  UC1192334  Polygonum amphibium var. emersum Herbert L. Mason and Verne Grant 1946-8-6 12970 Colusa pond 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  JEPS80165  Polygonum polygaloides subsp. kelloggii L. R. Heckard and J. Hickman 1980-7-2 5316 Colusa ne Snow Mtn. peaks (ca 10 mi w of Stonyford); Upper Milk Ranch Meadow 1920 Comment
  CDA43071  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 Colusa Sacramento Valley.; Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Comment
  CHSC107308  Polypogon australis L. P. Janeway; B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of Sacramento Valley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Large +- alkaline vernal pool/marsh. 49 Comment
  JEPS118671  Polypogon australis L. P. Janeway, B. Castro 2011-5-19 10282 Colusa Sacramento Valley. Extreme west edge of SacramentoValley; 1.8 km southeast of Funks Reservoir and 0.1 km northeast of Tehama-Colusa Canal. Comment
  RSA724951  Polypogon interruptus L. Ahart 2006-8-9 13159 Colusa between the southwest 1/4 and southeast 1/4; under the bridge across Stony Creek, just north of Stonyford. 348 Comment
  UCD91185  Polypogon maritimus Beecher Crampton 1958-5-19 4810 Colusa West of Lodoga. Little Stony Creek. Comment
  JEPS110385  Polypogon monspeliensis Lowell Ahart 2006-8-9 13122 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  JEPS75438  Polypogon monspeliensis W. L. Jepson 1934-5-4 16604 Colusa Princeton Comment
  SD225721  Polypogon monspeliensis Carol Witham, Jennifer Buck 2001-4-30 149 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
  UCD91294  Polypogon monspeliensis Beecher Crampton 1958-5-19 4809 Colusa West of Lodoga. Comment
  SEINET10960577  Polypogon monspeliensis A. Arthur Heller 1902-5-19 Heller 5570 Colusa Near Colusa Comment
  CHSC116676  Polystichum imbricans subsp. curtum Lowell Ahart; John Dittes, Josephine Guardino 2016-2-14 20721 Colusa On the east side of the gravel road, about 1/2 mile north of Letts Lake, about 1/2 mile south of thee large campground, about 13 miles (air) southwest of Stonyford. 966 Comment
  JEPS73497  Polystichum imbricans subsp. imbricans L. R. Heckard 1972-7-10 3115 Colusa Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  JEPS127193  Polystichum munitum Lowell Ahart, John Dittes, Josephine Guardino 2016-2-14 20720 Colusa About 1/2 mile north of Letts Lake, about 1/2 mile south of the large campground, about 13 miles (air) southwest of Stonyford. Comment
  HSC86897  Populus fremontii subsp. fremontii Anthony J. Desch, Bryon Cariss 1988-4-17 36 Colusa Goat Mountain Rd. 7 mi. W from its junction with Stonyford Rd. Comment
  UCR225261  Potamogeton diversifolius Ellen Dean, Gordon Harrington, J. Anderson, E. Bayon, R. Willmarth 2008-6-8 5107 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
  UCD35976  Potamogeton nodosus Beecher Crampton 1963-8-5 6870 Colusa 1/4 mile E Cortena. Comment
  CHSC46886  Potamogeton pusillus var. tenuissimus Vernon Oswald 1989-9-12 4006 Colusa Letts Lake in the Mendocino National Forest, ca. 10 mi (air) sw of Stonyford. On the edge of the lake. 1365 Comment
  UCD82732  Potentilla Craig Thomsen; G. Harrington 2009-5-14 2911 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  RSA0013900  Proboscidea louisianica J. C. Roos 1948-9-2 4024 Colusa West of Williams. Comment
  JEPS8022  Proboscidea louisianica subsp. louisianica Rimo Bacigalupi with L. R. Heckard 1951-8-6 3471 Colusa 4.6 mi nw Sites (along road between Sites and Lodoga) Comment
  UC914241  Proboscidea louisianica subsp. louisianica Verne Grant and Alva Grant 1946-8-6 7842 Colusa 4 mi nw Colusa (e Colusa Co.); West Butte Ranch Comment
  JEPS101449  Proboscidea lutea Dean W. Taylor 1999-8-10 17295 Colusa 1 mile South of Williams, field between Interstate 5 and Delphos Road (old highway), 150 meters southeast of Husted Road freeway overcrossing 29 Comment
  JEPS27877  Proboscidea lutea Richard Snow 1958-8-3 671 Colusa on road to Leesville near Highway 20 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
  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
  UCD84572  Prunus virginiana var. demissa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6097 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Goad, between Cold spring and Buck Flat. 971 Comment
  CHSC79456  Pseudognaphalium californicum B. Castro; L. P. Janeway 2000-5-4 1140 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  UCD159336  Pseudognaphalium californicum D. S. Park; E. Dean 2010-6-5 120 Colusa Walker ridge, Cold Spring Mt. roadside on exposed slope. 935 Comment
  CHSC113053  Pseudognaphalium luteoalbum Lowell Ahart 2013-10-1 19097 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  CHSC79457  Pseudognaphalium luteoalbum B. Castro; L. P. Janeway 2000-5-4 1136 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 249 Comment
  CHSC94451  Pseudognaphalium luteoalbum Lowell Ahart 2006-8-9 13125 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  SEINET3367922 Image available Pseudognaphalium luteoalbum Richard R. Halse 2012-3-25 8419 Colusa Williams, Weedy area behind the Chinese Restaurant on D street 24 Comment
  UCD58168  Pseudognaphalium luteoalbum Gordon Harrington 2007-5-15 58 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
  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
  UCR119099  Psilocarphus brevissimus Beecher Crampton 1953-4-29 1146 Colusa Sacramento Valley, 3 miles east of Maxwell 91 Comment
  CHSC79256  Psilocarphus oregonus B. Castro; L. P. Janeway 2000-4-10 1062 Colusa Vicnitiy of Sites in rolling hills near Sulphur Gap, among un-named tributaries to Lurline Creek. 91 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
  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
  JEPS40463  Psilocarphus tenellus W. L. Jepson 1932-5-7 16267 Colusa Indian Valley Indian Valley (w Colusa County) 518 Comment
  UC638695  Psilocarphus tenellus Ethel Crum 1938-5-7 2010 Colusa 4.2 mi n Rumsey; Inner North Coast Range, Comanche Hills 254 Comment
  UCD57867  Psilocarphus tenellus Gordon Harrington; Diana Hickson, Jack Alderson 2007-4-29 50 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
  CHSC79691  Psilocarphus tenellus var. tenellus L. P. Janeway; B. Castro 2000-5-1 6687 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 201 Comment
  CHSC80346  Psilocarphus tenellus var. tenellus Caroline Warren; Joyce Lacey-Rickert 1998-5-8 Colusa Vicinity of Sites and Antelope Creek. 91 Comment
  JEPS73504  Pterospora andromedea L. R. Heckard 1972-7-10 3121 A Colusa near Trout Creek crossing of trail to Box Springs; Snow Mt. 1828 Comment
  CHSC112221  Pterostegia drymarioides Lowell Ahart 2013-5-1 18669 Colusa On the east side of Bear Valley Road, about 2 1/2 miles (by road) northwest of the intersection of State Highway 20 and Bear Valley Road. 533 Comment
  UCD92227  Puccinellia simplex Beecher Crampton 1958-5-19 4824 Colusa Colusa County, 3 miles south of Maxwell, along U.S. Highway 99W. Comment
  UCD117828  Pyrola aphylla M. Vincent 1968-6-6 789 Colusa On road to Stony Ford from Goat Mt. 2 4/10 miles west of Old Mills Campground. Comment
  JEPS48934  Quercus X morehus Thomas H. Jukes 1938-11-24 Colusa Stonyford Comment
  UCD84509  Quercus X morehus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6060 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD83633  Quercus berberidifolia Fanny Ye; with PLB 102 class 2010-5-2 4 Colusa East slope of Walker Ridge. Along Brim Road, between Bear Valley and Walker Ridge. 493 Comment
  UCD83754  Quercus chrysolepis Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5951 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  CAS-BOT-BC86602  Quercus douglasii Roxana Stinchfield 1916-6-18 302 Colusa near College City Comment
  CAS-BOT-BC86603  Quercus douglasii Roxana S. Ferris 1917-4-14 580 Colusa 7 mi W of Arbuckle - Rumsey Road Comment
  SD236305  Quercus douglasii G. K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley: along River Road (generally following the Sacramento River), 1.1 miles north of Colusa. 17 Comment
  SFV876  Quercus douglasii S. C. Schank 1960-4-10 40 Colusa Bear Valley. Slope several hundred feet from creek. Comment
  UC993117  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  UC993123  Quercus douglasii J. M. Tucker 1948-9-22 1869 Colusa 11.3 mi w Williams (beside road to Venado) Comment
  SEINET13953272 Image available Quercus dumosa J. Major, E. Dahl 1962-1 Colusa Bear Valley Comment
  UCD163843  Quercus durata Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  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
  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
  UCSC010369  Quercus durata var. durata Dylan M. Neubauer, Tim Forsell 2016-3-30 593 Colusa (NCoRI) Walker Ridge, Bartlett Springs Road, 1.22 air-miles sse Baldy Mountain 899 Comment
  UCD46857  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa Butte Sink, along Butte Creek, ca. 3 miles northeast of Colusa. Comment
  UCR201775  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  CAS-BOT-BC104307  Quercus palmeri Roger Raiche 1990-12-2 s.n. Colusa across Sulphur Creek from Wilbur Springs Comment
  SBBG111415  Quercus palmeri J. M. Tucker 1991-8-19 4496 -a Colusa across Sulphur Crk from and SE of the hotel at Wilbur Springs 426 Comment
  SD225831  Quercus palmeri Roger Raiche 1990-12-2 Colusa Across Suphur Creek from Wilbur Springs; Comment
  SFV17753  Quercus palmeri R. Raiche 1990-12-2 s. n. Colusa Acoss Sulphur Creek from Wilber Springs. Comment
  UCD14527  Quercus palmeri Roger Raiche 1990-12-2 D Colusa California, Colusa Co.; across Sulphur Creek from Wilbur Springs; Comment
  JEPS75737  Quercus vacciniifolia L. R. Heckard 1974-9-10 3886 Colusa s side upper reaches of Dark Hollow Creek; Snow Mt., Dark Hollow Creek 2042 Comment
  UCD84513  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6064 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 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
  JEPS81342  Ranunculus alismifolius var. alismifolius L. R. Heckard and J. C. Hickman 1982-7-7 5955 Colusa just n West Ridge Pass (along Cedar Camp-Milk Ranch Trail, pass is nw of West Peak); Snow Mt. 2011 Comment
  UCD66942  Ranunculus aquatilis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5091 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western side of ranch along trail that follows the border of Lake and Colusa counties. Dunsfield Flat stock pond. 628 Comment
  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
  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
  UCD163664  Ranunculus canus Craig Thomsen 1998-6-10 1964 Colusa Bear Valley. About 7.5 miles north of Hwy 20. Comment
  UCR206394  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14373 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR206701  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2009-3-17 14391 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 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
  UCD57623  Ranunculus hebecarpus Joseph A. E. Stewart; with Plant Biology 102 2007-4-29 5 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Central part of ranch. Craig Canyon. South side of unimproved road. 335 Comment
  UCD64518  Ranunculus occidentalis Craig D. Thomsen 2000-4-12 2117 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mile west of Hwy 20/16 instersection, Colusa Co. milepost 3.00. 310 Comment
  UCD82511  Ranunculus occidentalis Craig Thomsen; G. Harrington 2009-5-12 2869 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  RSA268199  Ranunculus occidentalis var. eisenii Lyman Benson 1935-3-27 6327 Colusa 3 miles E of Lake County line Inner N coast, Sacramento River, Ukiah-Tahoe 610 Comment
  UC1952501  Raphanus Richard Halse 2007-3-22 7105 Colusa Williams, by the junction of 5th Street and B Street 25 Comment
  POM332451  Rhamnus californica Thomas W. Nelson, Jane P. Nelson 1978-4-29 3961 Colusa Along Bear Valley Rd., 2 miles from jct with Hwy 20. 366 Comment
  SEINET13946282 Image available Rhamnus californica A. A. Heller 1916-1 12360 Colusa Coast Range on the grade about 3 mi W of Leesville Comment
  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
  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
  UC870844  Rhamnus tomentella subsp. crassifolia A. A. Heller 1916-6-6 12359 Colusa about 3 mi w Leesville (on the grade); Coast Range Comment
  POM136497  Rhamnus tomentella subsp. tomentella Roxana Stinchfield 1916-7-10 478 Colusa In Oak grove Phillips Ranch Comment
  CDA21477  Rhododendron occidentale G. F. Hrusa 1989-5-7 6047 Colusa North Coast Ranges; Confluence of Little Stony Creek and Frenzel Creek at the Frenzel Ck. Research Natural Area. Mendocino National Forest. Comment
  CDA38890  Rhododendron occidentale var. californicum A. T. Leiser 1985-5-19 s.n. Colusa Between 3-4 miles along Frenzel Creek as it parallels the road M5 from Lodoga to Goat Mtn. Frenzel Creek is on south side of road and down 30-40 ft. 0 Comment
  JEPS66281  Rhus trilobata W. L. Jepson 1932-5-8 16295 Colusa n of Stonyford 365 Comment
  RSA403713  Rhus trilobata var. quinata Michelle Stevens 1979-4-14 30 Colusa Bear Valley Road, 3.9 miles north of State Route 20 412 Comment
  CAS-BOT-BC108891  Ribes divaricatum var. pubiflorum F. G. Renner 1924-6-25 653 Colusa Upper Letts Valley. 1371 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
  HSC44275  Ribes malvaceum Barbara Kelly 362 Colusa 1 mi.. from intersection of Bartlett Springs Rd. and Grapevine Spring Rd. on Walker Ridge Rd. Comment
  HSC47468  Ribes malvaceum J. P. Smith, J. O. Sawyer 1978-4-29 9767 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 Comment
  CHSC115751  Ribes malvaceum David Isle 2015-6-20 2156 Colusa North Coast Ranges: 4 mi W of Stonyford; SE of curve at culvert crossing just E of old dumpsite rd jct; uphill, 100-200' S of 18N01 in 2012 Mill Fire area chaparral. 10S -0533568E, 4357508N. 439 Comment
  HSC31993  Ribes malvaceum Steven Lagos 1974-5-4 59 Colusa Along roadside 747 Comment
  UCD97117  Ribes quercetorum Ellen Dean; G. Harrington, J. Alderson 2011-4-10 6900 Colusa Along Bear Valley Rd on west and east sides of road. 355 Comment
  UCR243003  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 306 Comment
  CAS-BOT-BC293684  Ribes roezlii Mona Bourell 1997-3-29 5770 Colusa Mendocino National Forest. Dixie Glade Campground 918 Comment
  UC75806  Rigiopappus leptocladus Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  UCD67038  Rigiopappus leptocladus Ellen Dean; Davis Botanical Society 2008-5-31 5018 Colusa west of I-5 at Maxwell, Goat Mountain, ridge below summit off of Goat Mountain Road. 1734 Comment
  UCR212316  Rigiopappus leptocladus Craig D. Thomsen 2000-4-12 2131 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, 0.25 mi west of Hwy 20/16 intersection, milepost 3.00 310 Comment
  JEPS80179  Rigiopappus leptocladus L. R. Heckard with J. Hickman 1980-7-3 5331 Colusa just w Summit Springs (sw <side of?> mt., ca 10 mi w of Stonyford, Colusa-Lake Co. boundary); Snow Mt. 1548 Comment
  CHSC84969  Rorippa curvisiliqua var. orientalis Lowell Ahart 2003-10-23 10664 Colusa On the east strand of East Park Reservoir, about 1/8 mile northwest of Sites Lodoga Road, about 1 mile north of Lodoga, about 21 miles west of Maxwell. 368 Comment
  CHSC86881  Rorippa nasturtium-aquaticum B. Castro; S. Innecken 2003-4-2 1412 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Grapevine Creek. In bottom of small stream. 167 Comment
  CHSC94411  Rorippa nasturtium-aquaticum Lowell Ahart 2006-8-9 13156 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 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
  SEINET8723619 Image available Rosa gymnocarpa Helen K. Sharsmith 1953-1 4405 Colusa Near Old Mill Camp, Trough Springs Ridge, Mendocino National Forest. 1036 Comment
  UC1101416  Rotala ramosior Malcolm A. Nobs, S. Galen Smith 1949-7-18 1008 Colusa 2.5 mi w of Williams Comment
  POM163497  Rubus vitifolius Roxana S. Ferris 1926-4-21 6310 Colusa Sycamore Slough/ Near Sycamore. Comment
  JEPS75734  Rumex acetosella L. R. Heckard 1974-9-9 3876 Colusa se of Foutch Camp (just ne of rocky promontory); Snow Mt. 1798 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
  CHSC29731  Rumex obtusifolius K. R. Stern 1980-5-5 6625 Colusa Vernal pool, south central border area of Colusa National Wildlife Refuge. 45 Comment
  UCR206365  Rumex pulcher George K. Helmkamp, E. A. Helmkamp 2009-5-20 14745 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  JEPS113058  Saccharum ravennae Gordon Leppig 2001-9-13 1611 Colusa Rt. 16. Cache Creek bridge #22-19. Comment
  CHSC79011  Sagina apetala J. Marr; C. Warren, H. West, N. Wight 1998-4-14 Colusa West of Maxwell, vicinity of Antelope Valley and Grapevine Creek. 121 Comment
  JEPS80761  Sagina saginoides L. R. Heckard and J. C. Hickman 1981-7-30 5728 Colusa s.e. side Snow Mt. (Trout Creek crossing) 1828 Comment
  SBBG115378  Sagittaria latifolia J. McCaskill, Mr. Harvey, L. Davis 1954-8-9 365 Colusa Butte Crk, ca. 4 mi E of Colusa, on E side of Sacramento River Comment
  UCD138041  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa Sacramento river, 1 mile north of Colusa on east side, below causeway. Comment
  UCD18529  Sagittaria latifolia June McCaskill; with Mr. Harvey and Loren Davis 1954-8-9 365 Colusa ca. 4 mi. east of Colusa, on east side of Sacramento River, Butte Creek Farms. Comment
  UCD163647  Salix breweri Craig Thomsen 1998-6-19 1943 Colusa Bear Valley. About 8.5 miles north of Hwy 20. Comment
  UCD55470  Salix breweri Ellen Dean; Gordon Harrington 2006-10-6 3294 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Ranch can be accessed via north gate which is located on a road on the S side of State Route 20, 2.3 road miles W of jct of State Routes 16 and 20. In Thompson Canyon, along dirt road that parallels ephemeral drainage. 362 Comment
  UCD56940  Salix breweri Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3542 Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  UCD57307  Salix breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3678 Colusa BLM Payne Ranch. Lands to the southwest of junction of Hwy. 20 and Hwy. 16. Thompson Canyon, near juncture with Craig Canyon. 362 Comment
  UCR198139  Salix breweri Ellen Dean, C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-7-7 3678 Colusa BLM Payne Ranch, lands to the southwest of junction of Hwy 20 and Hwy 16. Thomposon Canyon, near juncture with Craig Canyon 363 Comment
  JEPS80787  Salix exigua L. R. Heckard and J. C. Hickman 1981-7-30 5760 Colusa se side Snow Mt. (Trout Creek) 1600 Comment
  UCD163863  Salix exigua Craig D. Thomsen 2001-5-31 2548 Colusa Bear Creek Canyon south of Sulphur Creek confluence. About 3 miles north of Hwy 20. 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
  UCD56932  Salix exigua Ellen Dean; Gordon Harrington and Kate Mawdsley 2007-3-30 3534 a Colusa BLM Payne Ranch. Southwest of intersection of Hwy. 16 and Hwy. 20. Thompson Canyon. 344 Comment
  CAS-BOT-BC107838  Salix gooddingii Roxana Stinchfield 1916-7-7 397 Colusa Sycamore slough near Sycamore Comment
  CAS-BOT-BC107841  Salix gooddingii Alice Eastwood 1921-4-11 10237 Colusa Bear Valley 7.3 miles north of junction with California State Highway 20 along Bear Valley Road Comment
  CDA39532  Salix gooddingii G. D. Barbe 1975-6-4 2008 Colusa North of boat ramp, Colusa State Recreation Area. 0 Comment
  CDA12799  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa Inner North Coast Ranges; On Sites-Lodoga Rd. ~2.5 m. NW of Sites at base of Little Antelope Grade. Comment
  UCD111126  Salix laevigata G. F. Hrusa 1996-2-26 12634 Colusa 2.5 miles NW of Sites at base of Little Antelope Grade. 200 Comment
  UCD164155  Salix laevigata Craig Thomsen 1999-4-27 2000 Colusa southern Bear Valley. Comment
  UCD82128  Salix laevigata Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5658 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  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
  HSC103855  Salix lasiolepis G. Fred Hrusa 1999-5-16 15048 Colusa Below summit ridge of Goat Mountain on south side. 1723 Comment
  UCD81257  Salix lasiolepis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5422 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. Just north of the road leading up from the confluence of Bear and Cache Creeks. 323 Comment
  UCD84433  Salix lasiolepis Jack Alderson 2009-4-8 33 Colusa BLM Bear Creek Ranch (Previously Payne Ranch). Lands to the SW of jct of Hwys 16 and 20. Brophy Canyon. 304 Comment
  CHSC101023  Salix lasiolepis var. lasiolepis John Dittes; Josephine Guardino 2008-3-14 1515 Colusa Great Central Valley; Sacramento Valley; butween Butte Sink and Sacramento River, north of Sutter Buttes; ca. 1.6 air mile south of Gridley Road, ca. 1.1 air mile west of Drumheller Slough. 17 Comment
  CDA20232  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. Area mostly S. tragus. 0 Comment
  CDA37042  Salsola australis P. Akers 2003-10-7 s.n. Colusa Sacramento Valley; N of Maxwell on frontage rd E of Hwy 5, W of RR tracks, 1.8 mi N of Delevan Rd. 0 Comment
  CHSC78978  Salsola soda Vernon H. Oswald; Joseph G. Silveira 2000-10-12 9978 Colusa Delevan National Wildlife Refuge. Adjecent to the main refuge road 0.2 mi north of Maxwell-Colusa Rd. 18 Comment
  JEPS118679  Salsola soda B. Castro with Dave Bogener 2011-9-1 1913 Colusa Sacramento Valley. 10 air mi W of the Sacramento River and 800 ft N of the northern boundary of Delevan NWR. Near where Hunters and Logan Creeks empty into the Colusa Basin Drain. Moulton Weir 7.5' quad. Comment
  CAS-BOT-BC176899  Salsola tragus Roxana Stinchfield 1916-7-8 369 Colusa Sycamore Slough Road Comment
  CDA12015  Salvia columbariae G. F. Hrusa 1990-4-8 7667 Colusa North Coast Biodiversity Arena; Road into Bear Valley from the S, passing Wilbur Springs, and originating at Hwy. 20. Comment
  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
  CHSC86526  Salvia columbariae B. Castro 2003-3-18 1388 Colusa Vicinity of Sites, hills N of the Sites-Lodoga Rd, and Stone Corral Creek. 243 Comment
  HSC85950  Salvia columbariae Susan Carter, Eric May, Sarah McNaull 1987-4-12 153 Colusa Leesville Grade Comment
  UCD125703  Salvia columbariae Bob Zasoski 1967-5-6 25 Colusa around 6 miles north from State Highway 20 on Bear Valley Road (to Leesville). 396 Comment
  UCD70242  Salvia mellifera D. Sanchez-Mata 1998-7-9 s.n. Colusa Bear Valley. Destanella Flat-Walker Ridge. Open serpentine chaparral (Ceanotho albiflori-Quercetum duratae Sanchez-Mata, Barbour and Rodriguez in Rivas-Martinez 1997). 450 Comment
  JEPS73506  Sambucus mexicana L. R. Heckard 1972-7-10 3123 Colusa e Trout Creek crossing (on trail to Box Springs); Snow Mt. 1828 Comment
  JEPS85071  Sambucus mexicana L. R. Heckard and J. C. Hickman 1982-7-6 5935 Colusa slope above and e Summit Springs (s side of mt.); Snow Mt. 1584 Comment
  RSA60351  Sambucus mexicana G. R. Campbell 1948-6-18 652 Colusa 2 miles south of Wilbur Springs Comment
  CAS-BOT-BC238630  Sambucus nigra subsp. caerulea Roxana Stinchfield 1916-7-8 389 Colusa Sycamore Slough, Stinchfield ranch Comment
  JEPS228  Sanicula bipinnatifida W. L. Jepson 1932-5-8 16273 Colusa Lodoga; w Colusa Co. Comment
  UCD163673  Sanicula bipinnatifida Craig Thomsen 1999-4-15 1974 Colusa Bear Valley. About 5 miles north of Hwy 20, west of Bear Valley Rd. Comment
  CDA38531  Sanicula bipinnatifida T. C. Fuller 1958-4-17 s.n. Colusa 1 mile south of Lodoga. 0 Comment
  CDA15496  Sanicula graveolens G. F. Hrusa, WTD 1998-6-19 14633 Colusa North Coast Ranges; NE side of Goat Mtn. summit. 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
  UCD57338  Sanicula tuberosa Robin Testa 2007-3-25 3 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 560 Comment
  HSC45685  Scandix pecten-veneris Patricia Shesgreen 1978-4-22 39 Colusa Bear Valley Rd., 1.5 mi. from its junction with Hwy. 20 412 Comment
  UCR206400  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14377 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR225397  Schoenoplectus acutus Ellen Dean, Gordon Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5109 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
  UCD163662  Schoenoplectus acutus var. occidentalis Craig Thomsen 1998-6-10 1960 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD67087  Schoenoplectus acutus var. occidentalis Ellen Dean; G. Harrington, J. Alderson, E. Bayon, R. Willmarth 2008-6-8 5109 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon. Spring-fed stock pond at base of uphill climb east side of ridge trail. 510 Comment
  CHSC83466  Schoenoplectus americanus Bill Maslach 2001-6-6 11 Colusa Intersection of Salt Cr. and Hwy. 20; downstream of bridge marked '1930.' On creek bank. 175 Comment
  UCD50161  Schoenoplectus pungens D. Sanchez-Mata 1998-7-10 s.n. Colusa Lodoga-Stonyford. Mendocino National Forest. Goat Mountain between Lodoga and Red Rock Cabin. 420 Comment
  UCD72473  Schoenoplectus pungens Ellen Dean; J. Alderson, N. Voegtly, and C. Thomsen 2007-5-12 3807 Colusa BLM Payne Ranch, lands to the SW of jct of Hwys 16 and 20. Area of ranch west of Hwy 16, near bridge that spans Bear Creek, ca. 4.5 road miles south of junction of Hwy 16/20. Bank of Bear Creek near north end of bridge, west side of creek. 259 Comment
  UCD63106  Schoenoplectus pungens var. longispicatus Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4937 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of Hwys 20 and 16. Unnamed drainage south of Hwy 20 between Hwy 16 and Lynch Canyon that drains to Bear Creek by passing under Hwy 20. 344 Comment
  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
  CDA2621  Scirpus glaucus M. R. Pryor 1947-5-1 Colusa Grimes (col. near Biggs) 0 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
  UCD83760  Scribneria bolanderi Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5956 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, Buck Flat. 875 Comment
  POM21047  Scrophularia californica Roxana Stinchfield 1916-6-18 305 Colusa Timber near College City Comment
  JEPS73453  Scutellaria californica L. R. Heckard 1972-7-8 3053 Colusa on n side of ridge running se of Snow Mountain (West Peak); West Peak 2011 Comment
  JEPS83803  Scutellaria californica L. R. Heckard and J. C. Hickman 1981-7-30 5772 Colusa heading up East Ridge of Snow Mountain, West Peak 1950 Comment
  UCD82582  Scutellaria californica Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2727 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  CHSC112016  Scutellaria siphocampyloides David Isle; F. Thomas Griggs 1979-5-23 2073 Colusa Mendocino National forest. Off N side Goat Mtn. Rd, about 2 miles W of jct w/ Lodoga-Stonyford Rd. Near old fire pre-attack triangular sign I-7 on metal T-post. 426 Comment
  CHSC117779  Scutellaria siphocampyloides David Isle; Terril Wolt 2016-6-16 2165 Colusa North Coast Range:~3/4 mile NE of Fotus Springs and ~1/4 mile west of Davis Flat on S bank of serpentine rivulet. Fouts Springs, California. 499 Comment
  CHSC79519  Scutellaria tuberosa B. Castro; L. P. Janeway 2000-5-2 1108 Colusa Vicinity of Sites, Sites-Lodoga Rd, and Grapevine Creek. 234 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
  UCD82734  Senecio aronicoides Craig Thomsen; G. Harrington 2009-5-14 2915 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. 762 Comment
  RSA700358  Senecio clevelandii L. P. Janeway 2001-6-6 7112 Colusa Eaton Springs, about 2.4 km. east of Walker Ridge Road. 713 Comment
  POM174569  Senecio eurycephalus Roxana S. Ferris 1926-4-23 6454 Colusa Stonyford Comment
  CDA11923  Senecio greenei G. F. Hrusa 1989-5-7 6078 Colusa North Coast Biodiversity Arena; N side of Little Stony Creek, approx. 3.7 miles upstream from intersection of Cedar Mtn. Rd. and Stonyford-Lodoga Rd. Comment
  CHSC6689  Senecio vulgaris Marilyn Lee 1968-3-30 119 Colusa North side of Hwy. 16 at junction of Hwy. 16 and Hwy. 20. Between Hwy. 16 and Cache Creek. Comment
  UCR206873  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14316 Colusa Sacramento Valley, along River Road, 0.9 mile north of the city of Colusa 17 Comment
  CAS-BOT-BC364516  Senecio vulgaris Roxana S. Ferris 1926-4-21 6273 Colusa Sycamore Slough 2 miles west of Sycamore Comment
  CAS-BOT-BC243614  Setaria pumila Milo S. Baker 1946-9-4 11602 Colusa Butte Sink, West Gridley Road Comment
  JEPS110389  Setaria viridis Lowell Ahart 2006-8-9 13137 Colusa North side and under the bridge across Stony Creek, just north of Stonyford 347 Comment
  UCD81249  Sherardia arvensis Ellen Dean; G. Harrington, R. Willmarth, B. Rice, and C. Thomson 2009-4-8 5413 Colusa BLM Bear Creek (Payne) Ranch. Lands to the SW of the intersection of Hwys. 16 and 20. South of the canyon that is located south of Brophy Canyon. 375 Comment
  SFV17852  Sidalcea diploscypha J. M. Tucker 1980-5-3 4443 Colusa Bear Valley. 4.3 miles south of junction of Brim Road and Bear Valley Road. 396 Comment
  UCD57860  Sidalcea diploscypha Gordon Harrington 2007-4-17 28 Colusa Payne Ranch (owned by BLM), lands to the SW of the intersection of State Routes 20 and 16. Destanella Flat, just south of Hwy 20, approximately 3.4 road miles west of the Hwy 16 intersection. 553 Comment
  SBBG117358  Sidalcea diploscypha R. E. Rolley 1977-5-8 Colusa 0.3 mi NNW on Bear Valley Rd from Hwy 20 Comment
  UC71634  Sidalcea hartwegii Miss Alice King 1905-1 Colusa College City Comment
  CHSC79771  Sidalcea keckii L. P. Janeway; B. Castro 2000-5-3 6700 Colusa Vicinity of Grapevine Creek and Sites-Lodoga Road. 396 Comment
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Mar 15 2011
  JEPS105737  Sidalcea keckii David Gowen 2004-5-18 84 Colusa About 1.5 miles south of Stonyford. Road shoulder on the east side. Comment
  JEPS123189  Sidalcea keckii David Gowen 2009-5-6 1014 Colusa Eastside of Hwy 20, about 16 miles west of Williams, near milepost 6.42 (from county line?). Comment
  UC852801  Silene californica A. A. Heller 1937-4-24 15351 Colusa on Highway #20, 15 mi w Williams; w of Williams Comment
  UCD56688  Silene campanulata subsp. glandulosa Gordon Harrington 2007-3-25 7 Colusa BLM Payne Ranch. Destinella Flat area, just E of the Lake County border, ca. 3.4 road miles along Hwy 20 from the junction of Hwy 16 and Hwy 20. South side of Hwy 20. 586 Comment
  UCD81714  Silene campanulata subsp. glandulosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5720 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  CAS-BOT-BC388980  Silene laciniata subsp. californica Lewis S. Rose 1936-4-27 36179 Colusa 11 mi. NW. of Rumsey 304 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
  SBBG29886  Silene laciniata subsp. californica L. S. Rose 1936-4-27 36179 Colusa 11 mi NW of Rumsey 304 Comment
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Aug 11 2014
  SEINET11262894  Silene laciniata subsp. californica Richard R. Halse 2014-3-25 9036 Colusa Along the Bear Valley Road ca. 1.8 miles W NW of its junction with State Hwy 20.; 0 378 Comment
  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
  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
  UCR238925  Sinapis alba George K. Helmkamp, E. A. Helmkamp 2012-2-9 18530 Colusa Sacramento Valley, River Road, 7.1 miles north of Colusa; east side of Sacramento River 18 Comment
  CAS-BOT-BC74903  Sinapis arvensis Roxana S. Ferris 1917-4-12 513 Colusa 4 mile east of Williams. Comment
  HSC72140  Sinapis arvensis J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-2 9572 Colusa Bear Valley Rd., 2.1 mi. from its junction with Hwy. 20 366 Comment
  HSC29849  Sinapis arvensis Thomas W. Nelson 1972-4-8 605 Colusa Beside Bear Valley Rd., 2 mi. N of Hwy. 20 Comment
  RSA249346  Sinapis arvensis Thomas W. Nelson 1972-4-8 605 Colusa Beside the Bear Valley road ca 2 mi N of Hwy 20. Comment
  CAS-BOT-BC75280  Sisymbrium officinale Roxana S. Ferris 1926-4-21 6272 Colusa On Sycamore Slough 2 miles west of Sycamore. Comment
  CHSC112272  Sisyrinchium bellum Lowell Ahart; John Dittes, Josephine Guardino 2013-4-26 18644 Colusa Inner North Coast Range. North side of State Highway 20, just east of Lake County Line, 12.2 miles (air) east-northeast of Clear Lake (town), 17.1 miles (air) west of Williams. 566 Comment
  CHSC58404  Sisyrinchium bellum Clinton C. Shock 1980-5-3 58 Colusa Bear Valley, ca. 12 miles northwest of Highway 20. 384 Comment
  HSC31401  Sisyrinchium bellum Maralyn O'Meara, Gary S. Lester 1974-5-4 349 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  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
  POM163504  Sisyrinchium bellum Roxana S. Ferris 1926-4-21 6307 Colusa Near Sycamore Comment
  UCD138841  Sisyrinchium bellum Clinton C. Schock 1980-5-3 58 Colusa Bear Valley, around 12 miles northwest of Highway 20. 384 Comment
  UCD66596  Sisyrinchium bellum Craig D. Thomsen 2000-4-28 2247 Colusa Bear Creek Botanical Management Area. On Caltrans right-of-way, south side of Hwy 20, about 0.5 mile west of Hwy 20/16 instersection, between Colusa Co. milepost 2.63 and 2.17. 325 Comment
  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
  JEPS120808  Solanum americanum Lowell Ahart 2013-10-1 19082 Colusa Strand of East Park Reservoir, about 2.5 air miles SE of Stonyford, about 2.5 miles NW of Lodoga, about 10 air miles NW of Sites. Comment
  UCD13386  Solanum parishii Charles Martin 1986-5-17 35 Colusa Mendocino National Forest. 3.7 miles west of Stonyford on Forest Service Road 18NO1. Comment
  CDA32822  Solanum parishii P. Hiatt 1979-4-26 Colusa North end of Bear Valley at Bartlett Springs Road. 0 Comment
  CHSC94521  Solanum physalifolium var. nitidibaccatum Lowell Ahart 2006-8-22 13223 Colusa South side of Stony Creek, about 100 yards west of the bridge across Stony Creek, just north of Stonyford. 349 Comment
  CHSC45991  Solanum rostratum Lowell Ahart 1980-6-11 2370 Colusa Along the edge of the River Road, where the road dips and floods during high water, about 9 1/2 miles north of Colusa. 30 Comment
  CAS-BOT-BC35921  Solanum umbelliferum Roxana S. Ferris 1926-4-23 6591 Colusa Near Stonyford. Comment
  JEPS16203  Solanum umbelliferum Rimo Bacigalupi, Arthur Holmgren 1950-4-25 3175 Colusa 10 mi nw of Sites (Grapevine Grade to Lodoga); Grapevine Grade Comment
  UC1733755  Solanum umbelliferum Kay H. Beach 1940-5-16 658 Colusa Colusa and Lake county line Comment
  JEPS127581  Solidago velutina subsp. californica David Isle with Terril Wolt 2016-7-15 2168 Colusa North Coast Ranges: ~5 1/2 miles W of Stonyford off S side Fouts Springs Road M10 (18N01.2). Also ~5/8 mile SE of M10 Junction with Trough Sp R Rd M5 (18N07). Comment
  CAS-BOT-BC236520  Sorghum bicolor Mary L. Bowerman 1940-1-1 3836 Colusa Wall Point Trail, Mount Diablo Comment
  CAS-BOT-BC235304  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  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-BC390067  Spergularia atrosperma Roxana S. Ferris 1917-4-12 509 Colusa 4 miles East of Williams Comment
  CAS-BOT-BC390102  Spergularia bocconi Roxana Stinchfield 1916-6-15 274 Colusa College City Comment
  RSA0098748  Spergularia macrotheca Malcolm A. Nobs, S. Galen Smith 1949-6-18 874 Colusa Highway 99W, near Delevan. Comment
  CHSC29847  Spergularia macrotheca var. leucantha K. R. Stern 1980-6-30 6658 Colusa Vernal pool area, south border Colusa National Wildlife Refuge. 45 Comment
  CAS-BOT-BC390759  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 636 Colusa 2 mi. so. of Maxwell Comment
  CAS-BOT-BC390760  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 638 Colusa 5 mi. west of Colusa Comment
  CAS-BOT-BC390763  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  CAS-BOT-BC390767  Spergularia marina G. B. Rossbach; R. P. Rossbach 1938-5-31 632 Colusa 3 mi. e. of Williams Comment
  JEPS89204  Sphenosciadium capitellatum L. R. Heckard and J. C. Hickman 1981-7-31 5793 Colusa e side Snow Mt. (Dark Hollow Creek); e side of Snow Mt., Dark Hollow Creek 1584 Comment
  SEINET9361561  Stachys ajugoides var. ajugoides Unknown 1999-8-18 15241 Colusa Bear Valley Comment
  CDA41017  Stachys ajugoides var. ajugoides Agr. Comm Staff 1960-5-11 s.n. Colusa [no additional data] 0 Comment
  CHSC94290  Stachys ajugoides var. rigida Lowell Ahart 2006-8-9 13091 Colusa Gravel bar on the south side of Stony Creek, at Mine Camp, about 3 1/2 miles (air) west of Stonyford. 455 Comment
  CHSC94516  Stachys ajugoides var. rigida Lowell Ahart 2006-8-22 13235 Colusa North side and under the bridge across Stony Creek, just north of Stonyford. 347 Comment
  JEPS110096  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
  JEPS73445  Stachys ajugoides var. rigida L. R. Heckard 1972-7-8 3042 Colusa n side of ridge running se West Peak (ca. 10 mi w of Stonyford); Snow Mt. 2011 Comment
  JEPS94680  Stachys albens Vernon H. Oswald and Lowell Ahart 1998-7-15 9268 Colusa Bartlett Springs Rd. 1.6 mi w Bear Valley Rd. 487 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
  CHSC113042  Stachys rigida var. rigida Lowell Ahart 2013-10-1 19080 Colusa Inner North Coast Range. Strand of East Park Reservoir, about 2 1/2 miles (air) southeast of Stonyford, about 2 1/2 miles northwest of Lodoga, about 10 miles (air) northwest of Sites. 364 Comment
  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
  CHSC62885  Stellaria media Vernon H. Oswald 1994-3-14 5991 Colusa Sacramento National Wildlife Refuge. Refuge located ca. 7 mi S of Willows, between Cell 1, Tract 38 and Tract 41. Along the side of a levee road. 25 Comment
  UC72583  Stellaria media Miss M. Alice King 1905-1 Colusa near College City; Sacramento Valley Comment
  JEPS80756  Stephanomeria lactucina L. R. Heckard and J. C. Hickman 1981-7-29 5723 Colusa spur about 1 km se Summit Springs (s side of Snow Mt.); Snow Mt. 1554 Comment
  UCD111679  Streptanthus Christopher Mallek 2008-1 s.n. Colusa Frenzel Creek. 654 Comment
  UC1736740  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
  UCD115959  Streptanthus breweri D. Sanchez-Mata 1998-6-24 s.n. Colusa Bear Valley. Bear Valley Road. Bear Valley Creek. 370 Comment
  UCD164311  Streptanthus breweri Ryan O'Dell 2010-7-1 s.n. Colusa UTM zone 10, 553253, 4318610. [UTM coordinates place this location along Bear Valley Rd., north of HWY 20.] 381 Comment
  CAS-BOT-BC61236  Streptanthus breweri Roger Raiche 1985-5-25 RR 50459 Colusa West of Williams, Bear Valley, Bear Valley Road about 1 mile from its origin at Route 20. 365 Comment
  CAS-BOT-BC61239  Streptanthus breweri Oakley Shields 1970-4-17 73 Colusa Near Wilbur Springs 2 miles northwest of Bear Valley Road and Highway 20. Comment
  SEINET11998398  Streptanthus breweri Unknown 1986-1 60216 Colusa S of Snow Mt., nr intersection of road to Summit Springs & roads 17N29 & 24N02 1280 Comment
  UCD73921  Streptanthus breweri G. Ledyard Stebbins 1966-6-6 6431 Colusa Above Frenzel Creek, on slopes of Lovelady Ridge. 609 Comment
  UC956511  Streptanthus breweri var. breweri Freed W. Hoffman 1947-6-19 1021 Colusa Cook Springs Comment
  UC956515  Streptanthus breweri var. breweri Freed W. Hoffman 1948-6-28 Colusa 1.8 mi n Fouts Springs; Red Bridge 441 Comment
  UCD57303  Streptanthus breweri var. breweri Ellen Dean; C. Thomsen, S. Bledsoe, J. Alderson, M. Starbuck 2007-4-7 3674 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
  UCD63121  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen, S. Harrison 2008-5-18 4951 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
  UCD82160  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5693 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCD82450  Streptanthus breweri var. breweri Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5693 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CHSC40532  Streptanthus glandulosus Sara E. Wold 1982-3-27 7 Colusa Salt Canyon, n side of Salt Creek, hwy 20, ca. 17.7 km wsw of Williams. 145 Comment
  HSC87332  Streptanthus glandulosus Gail B. Phillips 1982-3-27 4 Colusa Salt Canyon, N side of Salt Creek, Hwy. 20, 11 mi. WSW of Williams 143 Comment
  JEPS16222  Streptanthus glandulosus subsp. glandulosus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3183 Colusa burned slope just w base of grade to Indian Valley (Bartlett Mt. Road) (just w of Bear Valley); Inner North Coast Ranges Comment
  RSA303544  Streptanthus glandulosus subsp. glandulosus Jim Shevock 1971-4-8 936 Colusa Bear Valley Road. 366 Comment
  UC1178879  Streptanthus glandulosus subsp. glandulosus Herbert L. Mason 1941-4-5 12408 Colusa on road between Maxwell and Stonyford just w summit of grade Comment
  UCD167945  Streptanthus morrisonii James Neilson 1982-7-1 4089 Colusa About 6 miles west of Lodoga, about 1 mile south of mouth of Frenzel Creek. (Exact location unknown. Coordinates estimated by label maker.) Comment
  SEINET11993694  Streptanthus morrisonii Unknown 1984-1 RR 40260 Colusa W of Ladoga