39.01683 39.11683 -122.53481 -122.43481 UC/JEPS: Consortium Search Results
Search Results — 1939 specimen records retrieved (1939 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCD81928  Achillea millefolium Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5509 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82114  Achillea millefolium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5642 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CDA26545  Achnatherum lemmonii G. F. Hrusa, R. Gross 2008-5-23 17400 Lake North Coast Ranges; Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA9361  Achnatherum lemmonii G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18584 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon near confluence of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CHSC101542  Achnatherum lemmonii G. F. Hrusa; R. Gross 2008-5-23 17400 Lake Flats along Box Canyon Creek in upper Benmore Canyon immediately E and S of Indiana Valley Reservoir spillway. 457 Comment
  CDA40149  Achyrachaena mollis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18541 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 128 Comment
  HSC27427  Achyrachaena mollis J. P. Smith, J. O. Sawyer 1972-4-1 5127 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31269  Achyrachaena mollis Carter Schleicher 1974-5-4 10 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31849  Achyrachaena mollis Maralyn O'Meara, Gary S. Lester 1974-5-4 327 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC41888  Achyrachaena mollis Lloyd Simpson 1977-4-23 262 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC41936  Achyrachaena mollis E. Cope 1977-4-23 26 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44368  Achyrachaena mollis D. L. Goforth 1977-4-23 14 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC59476  Achyrachaena mollis M. A. Erickson 1979-5-6 253 Lake 0.4 miles N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  HSC67932  Achyrachaena mollis J. P. Smith 1974-5-4 7359 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  RSA273300  Achyrachaena mollis K. Irwin 1977-4-23 287 Lake 0.4 mi N of state route 20 on the Walker Ridge Rd. 640 Comment
  RSA273310  Achyrachaena mollis Lloyd Simpson 1977-4-23 262 Lake 0.4 mi N of State Rt 20 on the Walker Ridge Rd. 640 Comment
  RSA416298  Achyrachaena mollis Dwain L. Goforth 1977-4-23 14 Lake 0.4 mile north of State Route 20 on Walker Ridge Road. 640 Comment
  RSA416300  Achyrachaena mollis J. Walker 1977-4-23 17 Lake 0.4 mi N of state route 20 on the Walker Ridge Rd. 640 Comment
  UCD81095  Achyrachaena mollis Ryan Abe; with PLB 102 class 2009-5-3 51 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD81092  Acmispon brachycarpus Michael Raines; with PLB 102 class 2009-5-3 7 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCD82373  Acmispon brachycarpus Craig Thomsen; G. Harrington 2009-5-12 2815 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 Comment
  CHSC71423  Acmispon glaber var. glaber Vernon H. Oswald; Lowell Ahart 1998-7-15 9310 Lake East side of county on Walker Ridge Rd. 10.9 mi south of Bartlett Springs Rd., 3.6 mi north of Hwy. 20. Roadside bank. 762 Comment
  HSC25721  Acmispon grandiflorus J. P. Smith 1971-6-6 4718 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC66024  Acmispon grandiflorus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 29 Lake Along Walker Ridge Rd., 1.3 mi. S of junction with access road to Indian Valley Dam. Comment
  UCD163334  Acmispon grandiflorus Craig D. Thomsen 2009-5-3 2805 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 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
  CHSC32951  Acmispon grandiflorus var. grandiflorus Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 22 Lake Along Walker Ridge Road, 1.3 miles south of junction with access road to Indian Valley Dam. Comment
  UCD81169  Acmispon wrangelianus Angela McGinnis; with PLB 102 class 2009-5-3 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82126  Acmispon wrangelianus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5655 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC133165  Adenostoma fasciculatum Margaret J. Williams; Wayne Roderick 1984-5-22 84- 17 -3 Lake Walker Ridge road, 1.4 mi in. 609 Comment
  HSC31965  Adenostoma fasciculatum Gary S. Lester 1974-5-4 134 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC41929  Adenostoma fasciculatum E. Cope 1977-4-23 42 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66637  Adenostoma fasciculatum Debbie Stamp, Joanne Spitler, Patty Powers, Cathy Railey, Cathy Macdonald 1980-4-19 20 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  UCD84556  Adenostoma fasciculatum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6081 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  CHSC32943  Adiantum jordanii D. Boyd; M. Eichelberger, T. Messick, T. Ranker 1980-4-19 9 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC66582  Adiantum jordanii D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 9 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC66647  Aesculus californica Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 15 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  CDA21524  Agoseris grandiflora G. F. Hrusa, R. Gross 2008-5-23 17450 Lake North Coast Ranges; Above N. Fk. Cache Cr. +/- 1/2 mi. below spillway of Indian Valley Reservoir. 423 Comment
  CDA22920  Agoseris grandiflora G. F. Hrusa, R. Gross 2008-5-23 17389 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  HSC47464  Agoseris grandiflora J. P. Smith 1978-4-22 9739 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  UC2014168  Agoseris grandiflora Ellen Dean, G. Harrington, C. Thomsen, Chiao-Yi Cheng, R. Wilmarth 2009-5-20 5643 Colusa Colusa County: Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. Comment
  UCD82099  Agoseris grandiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5626 Lake 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. 821 Comment
  UCD82115  Agoseris grandiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5643 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD82376  Agoseris grandiflora Craig Thomsen; G. Harrington 2009-5-12 2818 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 Comment
  CAS-BOT-BC21332  Agoseris grandiflora var. grandiflora Greg de Nevers 2001-5-14 12399 Lake Clear Lake, Lake County Land Trust, Rodman Slough 475 Comment
  HSC27438  Agoseris heterophylla J. P. Smith, J. O. Sawyer 1972-4-1 5142 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC95559  Agoseris heterophylla Todd Bouchier, Kathleen Gifford, Cameron Williams 1999-5-1 23 Lake Blue Oak Recreation Area; Walker Ridge Rd. 12.8 km. from Hwy. 20 536 Comment
  UCD81906  Agoseris heterophylla Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5487 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 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
  UCD82508  Agoseris heterophylla Craig Thomsen; G. Harrington 2009-5-12 2867 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCSC010468  Agoseris heterophylla var. cryptopleura Dylan M. Neubauer, Tim Forsell 2016-3-31 595 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  UCD163845  Agrostis exarata Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82097  Aira caryophyllea Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5624 Lake 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. 821 Comment
  UCD82469  Aira caryophyllea Craig Thomsen; G. Harrington 2009-5-12 2846 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD82470  Allium Craig Thomsen; G. Harrington 2009-5-12 2847 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 707 Comment
  HSC25716  Allium amplectens J. P. Smith, J. O. Sawyer 1971-6-6 4723 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  UCD82159  Allium amplectens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5689 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
  UCD82390  Allium amplectens Craig Thomsen; G. Harrington 2009-5-12 2832 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  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
  UCD81925  Allium bolanderi Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5506 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  CHSC27628  Allium bolanderi var. bolanderi Timothy Spira; Robert Schlising 1978-5-13 3243 Lake Near Colusa County Line on E side Lake Co., 0.5 mi N of Swy 20, on Walker Ridge Road. Comment
  HSC27380  Allium cratericola J. P. Smith, J. O. Sawyer 1972-4-1 5172 Lake 8.8 mi. N of junction of SR 20 and Walker Ridge Rd. Comment
  HSC66045  Allium cratericola D. Boyd, M. Eichelberger, Tim Messick, T. A. Ranker 1980-4-19 41 Lake Along Walker Ridge Rd. 3.7 mi. N of junction with access rd. to Indian Valley Dam Comment
  SEINET3884407  Allium cratericola D. Boyd, M. Eichelberger; T. Messick; T. A. Ranker 1980-4-19 37 Lake Along Walker Ridge Road, 0.5 miles north of junction with access road to Indian Valley Dam.; 0 Comment
  UCD83750  Allium cratericola Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5946 Lake Walker Ridge. Along Walker Ridge Road. At a lookout that overlooks Indian Valley Reservoir that is located 8.3 road miles N of the intersection of Hwy 20. 1054 Comment
  CHSC27671  Allium falcifolium Robert A. Schlising 1978-4-10 3217 Lake E of Clear Lake, near Colusa County line, 0.5 mi N of Hwy 20, on Walker Ridge Road. Comment
  HSC25717  Allium falcifolium J. P. Smith, J. O. Sawyer 1971-6-6 4722 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC31304  Allium falcifolium Carter Schleicher 1974-5-4 21 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31530  Allium falcifolium Maralyn O'Meara 1974-5-4 313 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC41858  Allium falcifolium K. Irwin 1977-4-23 296 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC41947  Allium falcifolium Richard G. Runyon 1977-4-23 20 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC44249  Allium falcifolium Barbara Kelly 1977-4-23 322 Lake 0.4 mi. S of SR 20 on Walker Ridge Rd. 640 Comment
  HSC67130  Allium falcifolium S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 0.5 mi. N of junction with access rd. to Indian Valley Dam Comment
  HSC85758  Allium falcifolium Jeff Dunk, Tallchief Comet, David Munger 1987-4-11 57 Lake Walker Ridge Rd. off Hwy. 20 E, 1.5 mi. E of Blue Oak Campground. Comment
  RSA296704  Allium falcifolium Rick Lundquist 1979-4-14 20 Lake 0.4 miles north of State Route 20 on the Walker Ridge Road. 640 Comment
  RSA367092  Allium falcifolium J. M. DiTomaso 1979-4-14 863 Lake 0.4 miles north of State Route 20 on the Walker Ridge Road. 640 Comment
  RSA367093  Allium falcifolium Carolyn Sanford 1977-4-23 347 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  SEINET3884474  Allium falcifolium D. L. Goforth 1977-4-23 19 Lake Wilbur Springs Quad. 0.4 miles north of State Route 20 on the Walker Ridge Rd.; 0 640 Comment
  UCD81098  Allium falcifolium Ryan Abe; with PLB 102 class 2009-5-3 53 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82517  Allium falcifolium Craig Thomsen; G. Harrington 2009-5-12 2875 a Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCR37945  Allium falcifolium P. Williams, Mike Malamus, Brian Kearney 1984-4-28 4 Lake 1.1 mi north of Blue Oak Campground of Indian Valley Access Road 854 Comment
  CAS-BOT-BC135888  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CAS-BOT-BC135889  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CAS-BOT-BC135890  Allium fimbriatum subsp. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake County line west of Wilbur Springs. Comment
  CAS-BOT-BC135892  Allium fimbriatum subsp. purdyi S. Mashayekhi; M. Biabani 2009-5-30 SM 033 Lake Inner North coast Ranges regions, 0.4 miles on Walker Ridge Rd., N. of Hwy 20. 384 Comment
  HSC41229  Allium fimbriatum var. purdyi llyod Simpson 1977-4-23 277 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC42242  Allium fimbriatum var. purdyi K. Irwin 1977-4-23 297 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC43199  Allium fimbriatum var. purdyi Carolyn Sanford 1977-4-23 346 Lake 0.4 mi. N of State Route 20 on the Walker Ridge Road. 640 Comment
  POM215800  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa/Lake Co. Line west of Wilbur Springs Comment
  RSA275390  Allium fimbriatum var. purdyi Carolyn Sanford 1977-4-23 346 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  RSA413091  Allium fimbriatum var. purdyi D. W. McNeal 1985-5-9 3068 Lake Above Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  RSA770527  Allium fimbriatum var. purdyi S. Mashayekhi, M. Biabani 2009-5-30 SM 033 Lake Inner North Coast Ranges regions, 0.4 miles on Walker Ridge Road, north of Hwy 20 384 Comment
  SEINET3884490  Allium fimbriatum var. purdyi D. L. Goforth 1977-4-23 23 Lake Wilbur Springs Quad. 0.4 miles north of State Route 20 on the Walker Ridge Rd.; 0 640 Comment
  SEINET3884497  Allium fimbriatum var. purdyi D. W. McNeal 1985-5-9 3068 Lake Above Walker Ridge Rd., 0.5 mi. n. of Hwy. 20.; 0 Comment
  UC518939  Allium fimbriatum var. purdyi David D. Keck 1933-5-30 2398 Colusa Colusa-Lake county line w Wilbur Springs Comment
  UCD83715  Allium fimbriatum var. purdyi Joseph Schlottman; with PLB 102 class 2010-5-2 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20. West side of the road where there is a turnaround and remnants of old road on saddle. 652 Comment
  UCR80281  Allium fimbriatum var. purdyi Carolyn Sanford 1977-4-23 346 Lake 0.4 mi north of State Route 20 on the Walker Ridge Road. 640 Comment
  CDA26529  Allium serra G. F. Hrusa, R. Gross 2008-5-23 17397 Lake North Coast Ranges; Middle Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC27629  Allium serra Timothy Spira; Robert Schlising 1978-5-13 3244 Lake Near Colusa County line, on E side of Lake County, 0.5 mi N of Hwy 20, on Walker Ridge Road. Comment
  HSC27448  Allium serra J. P. Smith, J. O. Sawyer 1972-4-1 5131 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31684  Allium serra Maralyn O'Meara, Gary S. Lester 1974-5-4 330 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31842  Allium serra Maralyn O'Meara, Gary S. Lester 1974-5-4 336 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC39465  Allium serra J. P. Smith 1974-5-4 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC41472  Allium serra Richard Runyon 1977-4-23 15 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42250  Allium serra K. Irwin 1977-4-23 295 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC42255  Allium serra N. G. Sugihara 1977-4-23 25 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC42258  Allium serra Rich White 1977-4-23 18 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42332  Allium serra Llyod Simpson 1977-4-23 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC72118  Allium serra J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9522 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC75319  Allium serra Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  RSA275389  Allium serra Carolyn Sanford 1977-4-23 341 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  RSA367172  Allium serra J. Walker 1977-4-23 19 Lake 0.4 mi N of state route 20 on the Walker Ridge Rd. 640 Comment
  SEINET3879165  Allium serra Carolyn Sanford 1977-4-23 341 Lake Wilbur Springs Quad. 0.4 miles north of State Route 20 on the Walker Ridge Rd.; 0 640 Comment
  UCD138635  Allium serra Christine Laning 1973-4-15 108- 34 Lake 0.6 mile from Highway 20 on Walker Ridge Road. Comment
  UCD81086  Allium serra Michael Raines; with PLB 102 class 2009-5-3 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD81194  Allium serra Robinder Aulakh; with PLB 102 class 2009-5-3 6 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 miles down road north of junction with Hwy 20. East side of the road. 731 Comment
  RSA245233  Allium serratum J. P. Smith, John Sawyer 1971-6-6 4723 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road Comment
  RSA256626  Allium serratum Bonnie Prange 1974-5-4 s.n. Lake Near Walker Ridge Road, 0.5 mile north of jct with Hwy 20 671 Comment
  RSA413094  Allium serratum D. W. McNeal 1985-5-9 3067 Lake Above Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  CAS-BOT-BC230055  Allophyllum gilioides Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 853 Comment
  UCD82489  Allophyllum gilioides Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5675 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 853 Comment
  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
  UCD163841  Alnus rhombifolia Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  HSC42349  Amelanchier pallida Ed Cope 1977-4-23 49 Lake Walker Ridge Rd. Comment
  CHSC33031  Amsinckia intermedia S. Harris; B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC27180  Amsinckia intermedia J. P. Smith, J. O. Sawyer 1972-4-1 5115 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31300  Amsinckia intermedia Carter Schleicher 1974-5-4 12 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31580  Amsinckia intermedia Teresa Prendusi 1974-5-4 34 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC41852  Amsinckia intermedia K. Irwin 1977-4-23 284 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC66016  Amsinckia intermedia Cathy Goldberg, Geoff Walsh, Lauren Philbrick, Lynn Kunstman 1980-4-19 1 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC91383  Amsinckia intermedia Sam Stroich Jr., Rolf Miller, Brian Pereira 1990-5-8 21 Lake Blue Oak Campground, Indian Valley Reservoir access road 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  CHSC117803  Amsinckia lunaris Jake Schweitzer 2010-4-1 Lake Inner North Coast Ranges. On BLM parcel, 470 m N of Highway 20, 70 m East of Walker Ridge Rd, ca 1.9 air mr SW of Wilbur springs 640 Comment
  CHSC117804  Amsinckia lunaris Jake Schweitzer 2010-4-1 Colusa Inner North Coast Rnages. On BLM parcel, approx. 265 m W of Walker Ridge Road (Bartlett Springs Rd on some maps) 120 m SE of Til Jones Spring. 853 Comment
  UCD81899  Amsinckia menziesii Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5480 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  HSC66058  Anagallis arvensis Cathie Goldberg, Lynn Kuntsman, Lauren Philbrick, Geoff Walsh 1980-4-19 44 Lake Along Walker Ridge Rd., 1 mi. N of its junction with access road to Indian Valley Dam Comment
  CHSC25544  Ancistrocarphus filagineus Robert A. Schlising 1977-4-24 3190 Lake Walker Ridge, along road 0.5 mi N of jct with Hwy 20 near Colusa County line. Comment
  CHSC33059  Ancistrocarphus filagineus James Payne Smith Jr. 1974-5-4 7355 Lake 0.5 miles north of junction of S. R. 20 and Walker Ridge Road. 670 Comment
  HSC27453  Ancistrocarphus filagineus J. P. Smith, J. O. Sawyer 1972-4-1 5126 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31459  Ancistrocarphus filagineus Maralyn O'Meara 1974-5-4 317 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31969  Ancistrocarphus filagineus Gary S. Lester 1974-5-4 131 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC44281  Ancistrocarphus filagineus Barbara Kelly 1977-4-23 328 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC67930  Ancistrocarphus filagineus J. P. Smith 1974-5-4 7355 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC75311  Ancistrocarphus filagineus Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  RSA256640  Ancistrocarphus filagineus Teresa Prendusi 1974-5-4 23 Lake Walker Ridge, 0.5 miles N of jct with State Route 20. 671 Comment
  UCD128904  Ancistrocarphus filagineus James Payne Smith Jr. 1974-5-4 7355 Lake 0.5 mile north of junction of S. R. 20 and Walker Ridge Road. Comment
  UCD81171  Ancistrocarphus filagineus Angela McGinnis; with PLB 102 class 2009-5-3 3 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCR81089  Ancistrocarphus filagineus G. Fred Hrusa 1993-5-2 10878 Lake North Coast Range, upper parts of north end of Walker Ridge, between Bear Valley & Indian Valley Reservoir 550 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
  CAS-BOT-BC230057  Antirrhinum vexillocalyculatum subsp. vexillocalyculatum Ellen Dean; K. Mawdsley; G. Harrington; R. Wilmarth; B. Rice; E. Salvia 2009-5-27 5709 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008 743 Comment
  UCD81699  Antirrhinum vexillocalyculatum subsp. vexillocalyculatum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5709 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  SD62173  Antirrhinum virga Annetta Carter, Louise Kellogg 1953-6-20 3242 Lake Hills west of Indian Valley, Bartlett Springs Road 449 Comment
  UC1282152  Antirrhinum virga Annetta Carter and Louise Kellogg 1953-6-20 3242 Lake w of Indian Valley (Bartlett Springs road); Inner North Coast Ranges 450 Comment
  UC1282153  Antirrhinum virga Annetta Carter and Louise Kellogg 1953-6-20 3242 Lake w of Indian Valley (Bartlett Springs road); Inner North Coast Ranges 450 Comment
  UC1552718  Apiastrum angustifolium Frederica Bowcutt 1985-4-10 476 Lake about 0.5 air mi n of Highway 20 (immed. w of Bureau of Land Management Walker Riege dirt road, Walker Ridge); Walker Ridge Comment
  UCD81176  Apiastrum angustifolium Angela McGinnis; with PLB 102 class 2009-5-3 7 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of the intersection with Hwy 20. East side of the road and up the ridge. 731 Comment
  UCD82387  Apiastrum angustifolium Craig Thomsen; G. Harrington 2009-5-12 2830 b 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
  HSC37637  Arabis breweri var. breweri John Rehling, Robert M. Specht 1976-3-26 167 Lake 8.3 mi. N on Barlett Springs Rd. from junction with Hwy. 20 Comment
  HSC44109  Arceuthobium campylopodum Barbara Kelly 1977-4-23 371 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62815  Arceuthobium campylopodum M. A. Ericksen 1979-5-6 255 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66035  Arceuthobium campylopodum D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 38 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC96752  Arceuthobium campylopodum J. Carey, A. Hong, J. Leffingwell 1995-4-1 22 Colusa Walker Ridge Rd., 0.9 mi. NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek 793 Comment
  UCD83681  Arceuthobium campylopodum John Rosenthal; with PLB 102 class 2010-5-2 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20, west side of the road where there is a turnout and a saddle between two ridges. 653 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
  UCD50538  Arctostaphylos canescens G. L. Webster 1989-5-6 7700 Colusa Near border with Lake County, Pinus attenuata woods on crest of Walker Ridge, near Cold Springs Mountain. Comment
  RSA670065  Arctostaphylos canescens subsp. sonomensis G. L. Webster 1989-5-6 7700 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  UCD51019  Arctostaphylos glandulosa G. L. Webster 1989-5-6 7697 Colusa Near Border with Lake County; on Walker Ridge; near Cold Spring Mountain. Comment
  UCD51022  Arctostaphylos glandulosa var. glandulosa G. L. Webster 1989-5-6 4699 Colusa Near border with Lake County; on Walker Ridge, near Cold Spring Mountain. Comment
  CAS-BOT-BC240291  Arctostaphylos manzanita Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6080 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  HSC27437  Arctostaphylos manzanita J. P. Smith, J. O. Sawyer 1972-4-1 5140 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC67106  Arctostaphylos manzanita Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 4 Lake Coldsprings Campground, along access road to Indian Valley Comment
  UCD84554  Arctostaphylos manzanita Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6080 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  HSC68120  Arctostaphylos stanfordiana J. P. Smith, J. O. Sawyer 1972-4-1 5140 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC27147  Arctostaphylos viscida J. P. Smith, J. O. Sawyer 1972-4-1 5167 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC27455  Arctostaphylos viscida J. P. Smith, J. O. Sawyer 1972-4-1 5154 Lake 2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC67088  Arctostaphylos viscida Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 12 Lake Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC67164  Arctostaphylos viscida J. P. Smith, J. O. Sawyer 1972-4-1 5154 Lake 2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC68122  Arctostaphylos viscida J. P. Smith, J. O. Sawyer 1972-4-1 5167 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC85790  Arctostaphylos viscida Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-10 Lake 6.5 mi. N of Hwy. 20 on Walker Ridge Rd. 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
  UCD52469  Arctostaphylos viscida R. Robichaux 1975-4-20 36 Colusa six miles northwest of Highway 20 on the north side of Walker Ridge road. Comment
  UCR52388  Arctostaphylos viscida Sandy Floyd, Tom Munton, T'ai Roulston 1987-4-11 84 Lake Blue Oak Campground, 8 mi north of Hwy 20 on Walker Ridge Road Comment
  HSC95817  Arctostaphylos viscida subsp. pulchella Ananda Dickie, Wendy Hooper, Rose Madrone, Kyla Waddell 1996-3-30 16 Lake Walker Ridge Rd. 0.9 mi. N of intersection with Walker Ridge Rd. on Indian Reservoir Rd., 57 mi. E of Hwy. 101 on Hwy. 20 777 Comment
  RSA182012  Arctostaphylos viscida subsp. pulchella W. L. Jepson 1920-5-23 8977 Lake Ridge between Indian and Bear Valleys. Comment
  UCD81854  Arctostaphylos viscida subsp. pulchella Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5738 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  CAS-BOT-BC44549  Arctostaphylos viscida subsp. viscida Eric B. Peterson; Thomas Ward; Matt Foruria 1995-4-1 47 Colusa Walker Ridge Rd., 0.9 mile NE of junction with Indian Valley Access Rd., adjacent to Freshwater Branch Creek. 810 Comment
  SBBG114893  Arctostaphylos viscida subsp. viscida C. Bornstein 1999-3-19 Lake Walker Ridge 731 Comment
  UCD82129  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCD82434  Argemone munita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5659 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  HSC66071  Argemone munita subsp. rotundata D. Boyd, Tim Messick, M. Eichelberger, T. Ranker 1980-4-19 28 Lake Along Walker Ridge Rd., 1.3 mi. S of junction with access road to Indian Valley Dam. Comment
  UCD84565  Artemisia douglasiana Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6090 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD84440  Asclepias eriocarpa Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6050 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
  UCD82491  Asclepias fascicularis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5677 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD164137  Asclepias speciosa Craig Thomsen 2000-6-12 2364 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82583  Astragalus breweri Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2728 Colusa Walker Ridge, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  CHSC115377  Astragalus gambelianus Lowell Ahart 2015-4-10 20021 Lake Normal size plants, on bare dry soil, poor soil on south of the barrier rocks. 696 Comment
  HSC30769  Astragalus gambelianus J. P. Smith, J. O. Sawyer 1972-4-1 5121 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31396  Astragalus gambelianus Maralyn O'Meara 1974-5-4 323 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31605  Astragalus gambelianus Gary S. Lester 1974-5-4 122 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  UCD163330  Astragalus gambelianus Craig D. Thomsen 2009-5-3 2799 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.5 miles north of Hwy 20. Comment
  UCD163837  Astragalus gambelianus Craig D. Thomsen 2001-4-12 2466 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD81089  Astragalus gambelianus Michael Raines; with PLB 102 class 2009-5-3 4 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD81093  Astragalus gambelianus Michael Raines; with PLB 102 class 2009-5-3 8 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCSC0010466  Astragalus gambelianus Dylan M. Neubauer, Tim Forsell 2016-3-31 597 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  CAS-BOT-BC193118  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 701 -1 Lake 0.45 miles from jct. Hwy 20 on Walker Ridge road 600 Comment
  CHSC115379  Astragalus rattanii var. jepsonianus Lowell Ahart 2015-4-10 20020 Lake Normal size plants, on damp dark soil, in the meadow. 696 Comment
  CHSC27668  Astragalus rattanii var. jepsonianus Robert A. Schlising 1978-4-10 3215 Lake E of Clear Lake, near Colusa County line; 0.5 mi N of Hwy 20 on Walker Ridge Road. Comment
  HSC44266  Astragalus rattanii var. jepsonianus Barbara Kelly 1977-4-23 337 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC75328  Astragalus rattanii var. jepsonianus Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  RSA475188  Astragalus rattanii var. jepsonianus Aaron Liston 1988-3-16 701 -1 Colusa 0.45 miles from jct. Hwy 20 on Walker Ridge road. 600 Comment
  RSA475239  Astragalus rattanii var. jepsonianus Aaron Liston, Sara Meury 1988-5-31 750 -1 Lake 0.45 miles from jct. hwy 20 on Walker Ridge Road. 600 Comment
  UCD163326  Astragalus rattanii var. jepsonianus Craig D. Thomsen 2009-5-3 2791 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  SEINET4680475  Astragalus rattanii var. rattanii D. W. McNeal 1983-5-1 2805 Lake Above Walker Ridge Rd., 0.4 mi. N of the junction of Hwy #20.; 0 Comment
  CDA22938  Athysanus pusillus G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17120 Lake North Coast Ranges; Walker Ridge Rd. at parking area about 1/4 mile N of Hwy 20. N slope, 601 Comment
  CDA40134  Athysanus pusillus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18565 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CHSC115376  Athysanus pusillus Lowell Ahart 2015-4-10 20024 Lake Normal size plants, on dampbare soil, on the east side of the barrier rocks, on the east side of the drainage. 696 Comment
  HSC28210  Athysanus pusillus J. P. Smith, J. O. Sawyer 1972-4-1 5128 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41935  Athysanus pusillus E. Cope 1977-4-23 29 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UCD114237  Athysanus pusillus G. F. Hrusa 1992-2-29 9058 Lake Approx. 2 miles N of Highway 20 on Walker Ridge Road. Comment
  UCSC010467  Athysanus pusillus Dylan M. Neubauer, Tim Forsell 2016-3-31 596 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.78 air-miles sse Cold Spring Mountain 815 Comment
  HSC27425  Avena barbata J. P. Smith, J. O. Sawyer 1972-4-1 5125 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41831  Avena barbata Rick Cooper 1977-4-23 36 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC75327  Avena barbata Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCD81910  Avena barbata Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5491 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  CDA22919  Avena fatua G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17122 Lake North Coast Ranges; Walker Ridge Rd. at parking area about 1/4 mile N of Hwy 20. N slope, 601 Comment
  CHSC101553  Avena fatua G. F. Hrusa; R. Gross, L. Houser 2008-4-11 17122 Lake Walker Ridge Rd. at parking area about 1/4 mile N of Hwy 20. 601 Comment
  UCD81904  Avena fatua Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5485 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD82112  Avena fatua Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5640 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
  UCD82621  Avena fatua Craig Thomsen; G. Harrington 2009-5-12 2891 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82105  Baccharis pilularis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5632 Lake 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. 821 Comment
  CAS-BOT-BC98151  Baccharis salicifolia B. Ellyson; J. Hooke; D. Newman 1996-5-4 32 Lake Benmore Canyon, Blue Oak Campground - 5.3 miles on Indian Reservoir Road; 57 miles east of Hwy. 101 on Hwy. 20. 548 Comment
  CDA9383  Baccharis salicifolia G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18581 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  HSC92106  Baccharis salicifolia D. Baxter, S. Boren, C. Williams 1994-4-23 9 Lake Blue Oak Campground 549 Comment
  UCD163323  Balsamorhiza macrolepis Craig D. Thomsen 1997-4-20 1922 Colusa Bear Valley. About 6 miles north of Hwy 20. Comment
  OBI54577  Balsamorhiza macrolepis var. macrolepis B. Castro, B. Corbin, K Earll, L. Hanson, D. Isle, L. P. Janeway 1995-4-28 564 Colusa Ca. 18 air mi due W of Williams, on Walker ridge just W of Walker Ridge rd., ca 0.5 mi S of jctn Bartlett Springs rd and Walker ridge Rd. (Site is a few hundred feet E of Lake co line.) 716 Comment
  UCD82618  Balsamorhiza macrolepis var. macrolepis Craig Thomsen; G. Harrington 2009-5-12 2887 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. Southeast side of Eaton Springs complex. 710 Comment
  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
  UCD148049  Berberis aquifolium Andrew Fulks 2014-4-11 s.n. Lake Above Benmore Canyon. Silver Spur Ranch. Private land. 487 Comment
  HSC27289  Berberis aquifolium var. dictyota J. P. Smith, J. O. Sawyer 1972-4-1 5179 Lake Wuntun Campground Comment
  HSC31389  Berberis aquifolium var. dictyota Maralyn O'Meara, Gary S. Lester 1974-5-4 354 Lake Along Walker Ridge Rd., near turnoff to Wintun Campground 915 Comment
  UCD84563  Berberis aquifolium var. dictyota Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6088 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  CDA11388  Berberis dictyota G. F. Hrusa, K. van Katwyk 1995-4-22 12108 Colusa Inner North Coast Ranges; Walker Ridge Road approximately 6 miles N of Highway 20. Comment
  CDA40141  Berberis dictyota G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18595 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon 1 1/2 mi. S of spillway at Indian Valley Reservoir. 525 Comment
  HSC31263  Brassica nigra Carter Schleicher 1974-5-4 7 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  UCD82536  Briza maxima Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5688 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  CAS-BOT-BC132188  Brodiaea coronaria subsp. rosea Roger Raiche 1985-5-25 RR 50461 Lake Nr. Colusa Co line, Walker Ridge, Barrel Springs campground area 670 Comment
  UC1280474  Brodiaea coronaria subsp. rosea Theodore F. Niehaus 1965-6-7 556 Lake 0.25 mi e Cache Creek (on road in Indian Valley); Indian Valley Comment
  UCD81696  Brodiaea elegans subsp. elegans Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5707 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCD82131  Brodiaea elegans subsp. elegans Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5657 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  RSA699786  Bromus arenarius L. Ahart 2004-6-30 11148 Glenn on the north side of Grindhouse Creek, just east of the deep wash, about 50 yards east of the bridge across Grindhouse Creek, about 50 yards west of the Grindhouse Rancheria Indian Reservation. 191 Comment
  UCD81879  Bromus carinatus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5759 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  CDA40155  Bromus carinatus var. carinatus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18593 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 454 Comment
  UCD83625  Bromus diandrus Adam Clause; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. Eaton Springs. 20 meters south of the main road, on the flat valley floor. 709 Comment
  HSC32504  Bromus hordeaceus Thomas W. Nelson, Jane P. Nelson 1974-4-8 1145 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC41827  Bromus hordeaceus Rick Cooper 1977-4-23 30 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC41834  Bromus hordeaceus Tom Duebendorfer 1977-4-23 14 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66044  Bromus hordeaceus D. Stamp, J. Spitler, P. Powers, Cathy Railey, C. Macdonald 1980-4-19 25 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66663  Bromus hordeaceus S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  UCD81916  Bromus hordeaceus Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5497 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 731 Comment
  UCD84558  Bromus hordeaceus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6083 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  CAS-BOT-BC231520  Bromus laevipes Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6057 Lake Walker Ridge. Picnic Area near wetland/marsh 899 Comment
  CDA26541  Bromus laevipes G. F. Hrusa, R. Gross 2008-5-23 17399 Lake North Coast Ranges; Upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA40157  Bromus laevipes G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18544 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 137 Comment
  CHSC101540  Bromus laevipes G. F. Hrusa; R. Gross 2008-5-23 17399 Lake W slope at crossing of Box Canyon Creek in upper Benmore Canyon immediately E and S of Indian Valley Reservoir spillway. 457 Comment
  HSC31698  Bromus laevipes Thomas E. Higley 1974-5-4 63 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  UCD81719  Bromus laevipes Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5724 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
  UCD84449  Bromus laevipes Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6057 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  HSC27451  Bromus madritensis subsp. rubens J. P. Smith, J. O. Sawyer 1972-4-1 5138 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31581  Bromus madritensis subsp. rubens Teresa Prendusi 1974-5-4 35 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC41824  Bromus madritensis subsp. rubens Rick Cooper 1977-4-23 37 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66023  Bromus madritensis subsp. rubens D. Boyd, M. Eichelberger, Tim Messick, Tom Ranker 1980-4-19 31 Lake Along Walker Ridge Rd., 1.3 mi. S of junction with access road to Indian Valley Dam. Comment
  HSC9313  Bromus madritensis subsp. rubens T. F. Newman 1965-4-6 653 Lake 15 mi. E of Clear Lake Oaks Comment
  UCD81914  Bromus madritensis subsp. rubens Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5495 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  CDA22930  Bromus sterilis G. F. Hrusa, R. Gross 2008-5-23 17408 Lake North Coast Ranges; Box Cyn. Creek and on in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA24952  Bromus sterilis G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17119 Lake North Coast Ranges; Walker Ridge Rd. at parking area about 1/4 mile N of Hwy 20. N slope, 601 Comment
  CHSC101531  Bromus sterilis G. F. Hrusa; R. Gross 2008-5-23 17408 Lake Along Box Canyon Creek and on roadside in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  HSC49860  Calandrinia breweri J. P. Smith, J. O. Sawyer 1978-4-29 9762 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  UCD81091  Calandrinia breweri Michael Raines; with PLB 102 class 2009-5-3 6 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  HSC27177  Calandrinia ciliata J. P. Smith, J. O. Sawyer 1972-4-1 5113 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC66032  Calandrinia ciliata S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  CAS-BOT-BC80333  Callitropsis macnabiana G. L. Stebbins 1968-5-15 6689 Lake Northeast edge of Little Indian Valley, on road from Leesville to Bartlett Springs 457 Comment
  CDA40164  Calochortus amabilis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18589 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CHSC34483  Calochortus amabilis J. D. Jokerst; R. A. Schlising 1979-6-10 83 Lake Near Colusa Co line, on Walker Ridge Rd 0.5 mi n of its jct with Hwy 20. Comment
  HSC25718  Calochortus amabilis J. P. Smith, J. O. Sawyer 1971-6-6 4720 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC31610  Calochortus amabilis Maralyn O'Meara 1974-5-4 315 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC35084  Calochortus amabilis Donald Spalinger 1974-5-4 29 Lake Walker Ridge Rd., 0.5 mi. N from Hwy. 20 671 Comment
  HSC41931  Calochortus amabilis Rich White 1977-4-23 30 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44858  Calochortus amabilis J. P. Smith 1974-5-4 7352 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC63058  Calochortus amabilis David Wheeler 1979-4-14 54 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC66589  Calochortus amabilis D. Boyd, M. Eichelberger, Tim Messick, T. A. Ranker 1980-4-19 22 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC75315  Calochortus amabilis Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  JEPS101262  Calochortus amabilis Dean W. Taylor 1972-5-8 1402 Lake Walker Ridge 1127 Comment
  SEINET3884894  Calochortus amabilis D. Boyd, M. Eichelberger; T. Messick; T. Ranker 1980-4-19 22 Lake Coldsprings Campground, along access road to Indian Valley Dam.; 0 Comment
  UCD81078  Calochortus amabilis Kalynda Stone; with PLB 102 class 2009-5-3 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCR37573  Calochortus amabilis Michelle A. Strull, L. Linstedt, C. Houseman 1984-4-28 s.n. Lake 23 mi. NE of Clearlake Oaks via Hwy 20 and Walker Ridge Road 610 Comment
  CDA40176  Calochortus luteus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18540 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 434 Comment
  JEPS127731  Calochortus luteus H. Forbes, B. Keller 2009-7-1 UCBG 32 Lake Walker Ridge Road, 10.35 km north of its junction with Hwy 20 and about 41.35 km NE of the town of Lower Lake.intersection with Bear Valley Road. Comment
  SEINET3885474  Calochortus luteus Margaret J. Williams, Duretta Roderick 1984-5-22 84- 17 -1 Lake Walker Ridge road, 1.4 mi in.; 0 610 Comment
  UCD81693  Calochortus luteus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5705 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCD82117  Calochortus luteus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5645 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  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
  UCD84574  Calochortus splendens Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6099 Lake Lake County. Along Walker Ridge Road between Barrel Springs and intersection with Bartlett Springs Road. West side of the road. 1038 Comment
  RSA488800  Calochortus superbus James L. Reveal 1988-6-2 6984 Lake Walker Ridge Road, 0.5 mile north of California Highway 20, about 10.5 air miles northeast of Clearlake Highlands and 21.5 miles west of Arbuckle. 655 Comment
  SEINET3885462  Calochortus superbus James L. Reveal 1988-6-2 6984 Lake Walker Ridge Road, 0.5 mile north of California HIghway 20, about 10.5 air miles northeast of Clearlake Highlands and 21.5 air miles west of Arbuckle.; 0 655 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
  UCD83629  Calochortus uniflorus Fanny Ye; with PLB 102 class 2010-5-2 1 Colusa E slope of Walker Ridge. Eaton Springs. On edge of campsite/parking area. 709 Comment
  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
  UCD84638  Calycadenia pauciflora G. Harrington 2009-7-7 85 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  UC766217  Calycanthus occidentalis R. F. Hoover 1938-6-9 3580 Lake ridge between Indian Valley and Bear Creek Valley Comment
  UCD81713  Calycanthus occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5719 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
  UCD82572  Calycanthus occidentalis Craig Thomsen 2008-6-12 2763 Colusa Walker Ridge, Elgin Mine area. Comment
  HSC25723  Calyptridium quadripetalum J. P. Smith, J. O. Sawyer 1971-6-6 4716 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  UCD100322  Calyptridium quadripetalum Neil Miller 1973-6-3 100 Lake roadside of Bartlett Springs Road on Walker Ridge. 609 Comment
  UCD82524  Calyptridium quadripetalum Craig Thomsen; G. Harrington 2009-5-12 2881 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
  HSC31579  Calystegia collina subsp. oxyphylla Teresa Prendusi 1974-5-4 33 Lake Walker Ridge, .5 mi. N of jct. with Hwy. 20 671 Comment
  UCD110421  Calystegia collina subsp. oxyphylla Daniel Slakey; CNPS volunteers 2011-6-11 7 Lake Walker Ridge. W of Walker Ridge Rd., in area that was burned in 2008. About 9 km N of Hwy.20 on Walker Ridge Rd. Border of Lake and Colusa County. 804 Comment
  UCD82493  Calystegia collina subsp. oxyphylla Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5682 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD84443  Calystegia collina subsp. oxyphylla Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6051 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  UCD81718  Calystegia occidentalis subsp. occidentalis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5723 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCR37885  Calystegia subacaulis K. Faber, Scott LaChance, Mike Rekart 1984-4-28 10 Lake Indian Valley access road, NE of Clearlake. 854 Comment
  UCR40024  Calystegia subacaulis P. Williams, Brian Kearney, Mike Malamus 1984-4-28 s.n. Lake Blue Oak Campground 610 Comment
  HSC41855  Camissonia graciliflora K. Irwin 1977-4-23 288 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC66070  Camissonia hirtella S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 1.3 mi. S of Jct. with access Rd. to Indian Valley Dam Comment
  UCD81935  Camissoniopsis hirtella Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5516 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82096  Camissoniopsis intermedia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5623 Lake 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. 821 Comment
  UCD82382  Camissoniopsis intermedia Craig Thomsen; G. Harrington 2009-5-12 2823 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  UCD82085  Campanula angustiflora Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5612 Lake 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. 821 Comment
  HSC66591  Capsella bursa-pastoris S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC72116  Capsella bursa-pastoris J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9521 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC95415  Capsella bursa-pastoris Jeff Enor, Heather Nichols, Bryan Wassom 1999-3-27 10 Lake Blue Oak Recreation Area, 8 mi. off Hwy. 20 537 Comment
  CDA26536  Carduus pycnocephalus G. F. Hrusa, R. Gross 2008-5-23 17405 Lake North Coast Ranges; Middle Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101526  Carduus pycnocephalus G. F. Hrusa; R. Gross 2008-5-23 17405 Lake Dry, open, disturbed flat along road, in Quercus douglasii woodland in middle Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD84536  Carduus pycnocephalus Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6136 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  UCD84570  Carduus pycnocephalus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6095 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD163855  Carex praegracilis Craig D. Thomsen 2001-4-12 2472 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82620  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2889 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82623  Carex praegracilis Craig Thomsen; G. Harrington 2009-5-12 2893 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC27290  Carex serratodens J. P. Smith, J. O. Sawyer 1972-4-1 5173 Lake Wuntun Campground Comment
  HSC45544  Carex serratodens J. P. Smith, J. O. Sawyer 1972-4-1 5173 Lake Wuntun Campground Comment
  HSC66033  Carex serratodens S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  UCD82442  Carex serratodens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5666 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCD82514  Carex serratodens Craig Thomsen; G. Harrington 2009-5-12 2872 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82720  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD82727  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2910 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD83799  Carex serratodens Craig Thomsen; G. Harrington 2009-5-14 2903 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  HSC30734  Castilleja affinis Teresa Prendusi 1974-5-4 25 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  CAS-BOT-BC230061  Castilleja applegatei Ellen Dean; C. Thomsen; G. Harrington; R. Wenk 2010-6-2 6046 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring 817 Comment
  HSC31606  Castilleja applegatei Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  UC2014139  Castilleja applegatei Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  UCD84431  Castilleja applegatei Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6046 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  HSC72432  Castilleja applegatei subsp. martinii J. P. Smith, J. O. Sawyer 1972-4-8 5192 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC82318  Castilleja applegatei subsp. martinii Thomas W. Nelson, Jane P. Nelson 1978-4-1 3848 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 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
  HSC27273  Castilleja attenuata J. P. Smith 1972-4-8 5187 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31844  Castilleja attenuata Maralyn O'Meara, Gary S. Lester 1974-5-4 334 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC62801  Castilleja attenuata Thomas Wood 1979-4-14 102 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  HSC66661  Castilleja attenuata D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 2 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC67129  Castilleja attenuata S. Harris, S. Ferguson, S. Smith, S. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC72117  Castilleja attenuata J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9523 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC72417  Castilleja attenuata J. P. Smith 1974-5-4 7358 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 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
  CHSC27537  Castilleja exserta Greg C. Halcomb 1978-4-9 12 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CHSC27558  Castilleja exserta W. K. Cheechov 1978-4-9 4 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  CHSC27800  Castilleja exserta T. Lawless 1978-4-8 12 Lake 5.1 mi. w of Walker Ridge Rd., Hwy 20. 457 Comment
  HSC27441  Castilleja exserta subsp. exserta J. P. Smith, J. O. Sawyer 1972-4-1 5145 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31315  Castilleja exserta subsp. exserta Carter Schleicher 1974-5-4 11 Lake 1/2 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31845  Castilleja exserta subsp. exserta Maralyn O'Meara, Gary S. Lester 1974-5-4 335 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC32500  Castilleja exserta subsp. exserta Thomas W. Nelson, Jane P. Nelson 1974-4-8 1145 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC48532  Castilleja exserta subsp. exserta Mark Flippo 1978-4-22 16 Lake Walker Ridge Rd., 6 mi. from Jct. with Hwy. 20, Metsker Comment
  HSC75325  Castilleja exserta subsp. exserta Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC82323  Castilleja exserta subsp. exserta Thomas W. Nelson, Jane P. Nelson 1978-4-1 3853 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD83682  Castilleja exserta subsp. exserta John Rosenthal; with PLB 102 class 2010-5-2 3 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.7 road miles north of intersection with Highway 20. East side of the road. 658 Comment
  CHSC27852  Castilleja exserta subsp. latifolia Phil Bulmert 1978-4-8 2 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
Read comments Apr 23 2020
  CHSC27548  Castilleja foliolosa Scott E. Patton 1978-4-9 14 Lake 5.1 m w of Walker Ridge Rd, Hwy 20. 457 Comment
  UCD81704  Castilleja foliolosa Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5712 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCD163343  Castilleja minor subsp. spiralis Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  UCD81864  Castilleja minor subsp. spiralis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5747 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD81865  Castilleja rubicundula subsp. rubicundula Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5748 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD82498  Castilleja rubicundula subsp. rubicundula Craig Thomsen; G. Harrington 2009-5-12 2857 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC64126  Caulanthus lasiophyllus J. P. Smith, J. O. Sawyer 1972-4-1 5124 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC75291  Caulanthus lasiophyllus Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCD81076  Caulanthus lasiophyllus Catherine Yasuda; with PLB 102 class 2009-5-3 7 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  HSC27465  Ceanothus cuneatus J. P. Smith, J. O. Sawyer 1972-4-1 5153 Lake 2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC42029  Ceanothus cuneatus M. A. Baker 1977-4-23 191 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC47566  Ceanothus cuneatus J. P. Smith, J. O. Sawyer 1978-4-29 9768 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 Comment
  HSC62783  Ceanothus cuneatus Marla J. Carollo 1979-4-14 24 Lake 0.4 mi N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62789  Ceanothus cuneatus J. M. DiTomaso 1979-4-14 867 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC63056  Ceanothus cuneatus David Wheeler 1979-4-14 60 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC66042  Ceanothus cuneatus D. Stamp, Cathy Railey, J. Spitler, P. Powers, C. Macdonald 1980-4-19 23 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  UCD111735  Ceanothus cuneatus Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 14 Lake along Walker Ridge Road, 2.65 miles south of junction with access road to Indian Valley Dam. Comment
  CAS-BOT-BC83808  Ceanothus cuneatus var. cuneatus D. O. Burge; C. Miller 2007-6-14 948 b Lake Grizzly Creek watershed, roadside on Walker Ridge Road 680 Comment
  UCD81101  Ceanothus cuneatus var. cuneatus Ryan Abe; with PLB 102 class 2009-5-3 56 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  CAS-BOT-BC50808  Ceanothus integerrimus Brad Kerstetter; Roxanne Jackson; Jeff Cox 1995-5-6 043 Colusa Blue Oak Campground - Left side of road just before reaching camp from highway 20 548 Comment
  HSC47467  Ceanothus integerrimus J. P. Smith, J. O. Sawyer 1978-4-29 9769 Colusa Walker Ridge Rd. 3.4 mi. from its jct. with Hwy. 20 Comment
  UC2014137  Ceanothus integerrimus Ellen Dean, C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Along Walker Ridge Road, between Cold Spring and Buck Flat. Comment
  UCD82544  Ceanothus integerrimus Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5699 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  UCD84451  Ceanothus integerrimus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD84453  Ceanothus integerrimus Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6059 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  CAS-BOT-BC51087  Ceanothus jepsonii Josh Suchocki; Charlene Vullo; Kyle Wear 1995-4-1 29 Lake 1.2 miles west of Walker Ridge Rd. intersection with Indian Valley Access Rd. 682 Comment
  CAS-BOT-BC51088  Ceanothus jepsonii D. Haskamp; E. Sonnenblick; M. Taft 1995-4-1 23 Lake 1.2 miles West of Walker Ridge Rd. intersection with Indian Valley Access Rd. 682 Comment
  HSC90407  Ceanothus jepsonii R. Cook, M. Lewis, L. Sims 1992-4-11 7 Colusa 1.0 mi S of Blue Oak Recreation Site on Walker Ridge Rd. 685 Comment
  HSC90415  Ceanothus jepsonii C. Wilson, P. Kittelson, M. Hardig 1992-4-11 42 Colusa Walker Ridge Rd., 1.0 mi S of Blue Oak Recreation Site 76 Comment
Read comments Aug 18 2014
  HSC97587  Ceanothus jepsonii A. Burgard, J. Goldsmith, J. Kalt 1996-3-30 13 Lake 1.4 mi W of Walker Ridge Rd. on Indian Reservoir Rd., 57 mi E of Hwy. 101 on Hwy. 20 683 Comment
  UCD112067  Ceanothus jepsonii D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  RSA332453  Ceanothus jepsonii subsp. albiflorus Cathie Goldberg, Lynn Kunstman, L. E. Philbrick, O. S. Walsh 1980-4-19 36 Lake Along Walker Ridge Road, 0.5 miles N of jct with access road to Indian Valley Dam. Comment
  CAS-BOT-BC51126  Ceanothus jepsonii var. albiflorus Jeff Dunk; Tallchief Comet; David Munger 1987-4-11 56 Lake Walker Ridge Road off Hwy 20 East; 1.5 miles East of Blue Oak Campground Comment
  CAS-BOT-BC83782  Ceanothus jepsonii var. albiflorus D. O. Burge; Steven Kembel 2008-5-27 997 b Colusa Rathburn-Petray Mine complex, E of Eaton Springs 700 Comment
  HSC31403  Ceanothus jepsonii var. albiflorus Maralyn O'Meara, Gary S. Lester 1974-5-4 348 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC59641  Ceanothus jepsonii var. albiflorus J. P. Smith, J. O. Sawyer 1972-4-1 5166 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC66067  Ceanothus jepsonii var. albiflorus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 33 Lake Along Walker Ridge Rd. 0.5 mi N of junction with access to Indian Valley Dam Comment
  HSC67053  Ceanothus jepsonii var. albiflorus Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 25 Lake Along Walker Ridge Rd., 0.5 mi. N of junction with access road to Indian Valley Dam Comment
  HSC69913  Ceanothus jepsonii var. albiflorus Thomas W. Nelson, Jane P. Nelson 1978-4-2 3873 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC85788  Ceanothus jepsonii var. albiflorus Rob Marheine, Bruce Delgado, Tim Tilghman 1987-4-10 Lake 6.5 mi. N of Hwy. 20 on Walker Ridge Rd. Comment
  HSC85921  Ceanothus jepsonii var. albiflorus Sandy Floyd, Tom Munton, T'ai Roulston 1987-4-11 85 Lake Walker Ridge Rd., 1.5 mi E of Blue Oak Campground Comment
  HSC85923  Ceanothus jepsonii var. albiflorus Eric May, Susan Carter 1987-4-11 131 Lake 6.5 mi from Hwy. 20 on Walker Ridge Rd., 1.4 mi E of Blue Oak Campground, SE of Indian Valley Reservoir Comment
  HSC89679  Ceanothus jepsonii var. albiflorus William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake 762 Comment
  HSC90059  Ceanothus jepsonii var. albiflorus Grefsrud, Reed, Rohmer 1990-4-15 57 Lake Indian Valley Reservoir access rd. 1.5 mi NE of intersection with Walker Rd. 689 Comment
  HSC90069  Ceanothus jepsonii var. albiflorus C. Baldwin, A. Hiss, P. Reynolds 1990-4-14 42 Lake Indian Valley Reservoir access rd. 1.5 mi NE of intersection with Walker Ridge Rd., 20 m off rd. 689 Comment
  HSC96785  Ceanothus jepsonii var. albiflorus J. Carey, A. Hong, J. Leffingwell 1995-5-6 75 Colusa 3.2 mi N on Walker Ridge Rd. from its junction with Indian Valley Access Rd. 854 Comment
  RSA757814  Ceanothus jepsonii var. albiflorus Dylan O. Burge 2008-5-27 DOB 997 c Colusa Rathburn-Petray Mine complex, east of Eaton Springs, 12.3 km 193 degrees true south-southwest of Leesville. 700 Comment
  CDA40145  Ceanothus parryi G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18596 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon 1 1/2 mi. S of spillway at Indian Valley Reservoir. 525 Comment
  UCD82113  Centaurea melitensis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5641 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
  UCD84539  Centaurea solstitialis Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6138 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  UCD82477  Centromadia Craig Thomsen; G. Harrington 2009-5-12 2855 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CAS-BOT-BC179408  Cercis occidentalis Mrs. H. C. Cantelow 1936-4-11 1176 Lake About 18 mi NW of Rumsey. Clear Lake Rd. Comment
  CAS-BOT-BC179427  Cercis occidentalis Camille F. Nowell 2011-6-11 7 Lake Hwy. 20 near summit of mountain, heading E toward Williams. 520 Comment
  HSC27285  Cercis occidentalis J. P. Smith, J. O. Sawyer 1972-4-1 5175 Lake Wuntun Campground Comment
  HSC62944  Cercis occidentalis A. T. Whittemore 1979-4-14 79029 Lake .4 mi. N of State Route 20 on the Walker Ridge Rd. 640 Comment
  UCD83622  Cercis occidentalis Adam Clause; with PLB 102 class 2010-5-2 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20. West side of the road where there is a turnaround and remnants of old road on saddle. 652 Comment
  RSA670064  Cercocarpus betuloides G. L. Webster 1989-5-6 7698 Colusa Walker Ridge, near Cold Springs Mt. Near border with Lake County. Comment
  CAS-BOT-BC137035  Cercocarpus betuloides var. betuloides Eric B. Peterson; Thomas Ward; Matt Foruria 1995-4-1 21 Lake Blue Oak Campground, about 50m up the canyon from the end of camping area, ~15m uphill from stream on N facing slope 548 Comment
  CAS-BOT-BC137036  Cercocarpus betuloides var. betuloides Thomas W. Nelson; Jane P. Nelson 1978-4-1 3845 Lake Along east side of Walker Ridge ca 1/4 mile north of junction with State Route 20 Comment
  UCD113068  Cercocarpus betuloides var. betuloides G. L. Webster 1989-5-6 7698 Colusa Near border with Lake County. Crest of Walker Ridge, near Cold Springs Mountain. Comment
  HSC31616  Cercocarpus montanus var. glaber Gary S. Lester 1974-5-4 139 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC85793  Cercocarpus montanus var. glaber Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd., Blue Oak Campground, E end Comment
  HSC99678  Cercocarpus montanus var. glaber J. P. Smith, J. O. Sawyer 1972-4-1 5176 Lake Wuntun Campground Comment
  UCD159334  Chaenactis glabriuscula D. S. Park; E. Dean 2010-6-5 118 Colusa Walker ridge, Cold Spring Mt. Exposed serpentine outcrop. 1032 Comment
  CHSC79665  Chaenactis glabriuscula var. heterocarpha L. Snyder; B. Redfern, A. de Knijf 1999-5-1 54 Lake Blue Oak Recreation area, Walker Ridge Rd, 12.8 km from Hwy 20. 536 Comment
  JEPS89460  Chaenactis glabriuscula var. heterocarpha Dean W. Taylor 1972-5-8 1400 Lake on Walker Ridge Walker Ridge 1127 Comment
  UCD81859  Chaenactis glabriuscula var. heterocarpha Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5743 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  UCD82735  Chaenactis glabriuscula var. heterocarpha Craig Thomsen; G. Harrington 2009-5-14 2916 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  UCD83717  Chamomilla suaveolens Joseph Schlottman; with PLB 102 class 2010-5-2 3 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  JEPS26643  Cheilanthes covillei Don Branscomb 1961-5-5 Lake ca. 3 1/2 mi e of crossing of N Fork Cache Creek (4 1/2 mi n of Colusa Co. line, near CA Hwy 20); Grizzly Canyon Comment
  HSC66587  Cheilanthes intertexta D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 18 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC32505  Chenopodium californicum Thomas W. Nelson, Jane Nelson 1974-4-8 1144 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  RSA258898  Chenopodium californicum Thomas W. Nelson, Jane P. Nelson 1974-4-8 1144 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  RSA589933  Chenopodium californicum Michael A. Vincent, Robert M. Rhode 1996-3-30 7313 Lake Hillside just N of jct Hwy 20 and Walker ridge Road Comment
  CHSC33053  Cirsium cymosum James P. Smith; John Sawyer 1971-6-6 4729 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road. Comment
  HSC68239  Cirsium cymosum J. P. Smith, J. O. Sawyer 1971-6-6 4729 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  UCD159331  Cirsium cymosum D. S. Park 2010-6-5 115 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD82543  Cirsium cymosum Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5698 a Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCD159335  Cirsium douglasii var. breweri D. S. Park; E. Dean 2010-6-5 119 Colusa Walker ridge, Cold Spring Mt. 886 Comment
  UCD81874  Cirsium douglasii var. breweri Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5755 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD81875  Cirsium douglasii var. breweri Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5755 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD159326  Cirsium occidentale D. S. Park 2010-6-5 112 Colusa Walker ridge, Cold Sring Mt. unpaved raodside, on slope. After fire. 656 Comment
  UCD84429  Cirsium occidentale Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6044 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  HSC59477  Clarkia affinis M. A. Ericksen 1979-5-6 254 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  CAS-BOT-BC164198  Clarkia concinna C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-28 4 Lake Walker Ridge, Blue Oak Campground, 23 mi. NE of [Clearlake] Clear Lake Oaks via SR20 and Walker Ridge Rd. 609 Comment
  CAS-BOT-BC164201  Clarkia concinna A. Burgard; J. Goldsmith; J. Kalt 1996-5-3 54 Lake Blue Oak Campground. 5.3 miles west of Walker Ridge Rd. on Indian Reservoir Rd. 57 mi. east of Hwy. 101 on Hwy. 20 548 Comment
  CAS-BOT-BC164202  Clarkia concinna B. Ellyson; J. Hooke; D. Newman 1996-5-4 33 Lake Benmore Canyon, Blue Oak Campground. 5.3 miles on Indian Reservoir Road; 57 miles east of Hwy. 101 on Hwy. 20 548 Comment
  CAS-BOT-BC164203  Clarkia concinna Tamara Gedik; Thom Heinz; Rebecca Siegle 1996-5-4 46 Lake Blue Oak Campground; 5.3 miles west of Walker Ridge Rd. on Indian Reservoir Rd. 548 Comment
  CAS-BOT-BC164204  Clarkia concinna Ananda Dickie; Wendy Hooper; Rose Madrone; Kyla Waddell 1996-5-4 46 Lake 5.3 miles west of Walker Ridge Rd., on Indian Res. Rd.; 57 miles east of Hwy. 101 on Hwy 20. Blue Oak Campground 548 Comment
  CAS-BOT-BC164205  Clarkia concinna L. Blackford; S. Branch; D. Malm 1988-4-16 34 Lake 6.1 miles on Walker Ridge Road off Hwy. 20 at Blue Oak Campground 731 Comment
  UCD82196  Clarkia concinna Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5696 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCR39818  Clarkia concinna Brian Kearney, P. Williams, Mike Malamus 1984-4-28 s.n. Lake Blue Oak Campground 610 Comment
  CDA24953  Clarkia concinna subsp. concinna G. F. Hrusa, R. Gross 2008-5-23 17386 Lake North Coast Ranges; Box Cyn. Creek in upper Benmore Canyon, immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  UC518943  Clarkia concinna subsp. concinna David D. Keck 1933-5-30 2401 Colusa w Wilbur Springs (1 mi e of Lake County line) Comment
  HSC31417  Clarkia gracilis Maralyn O'Meara, Gary S. Lester 1974-5-4 326 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC64525  Clarkia gracilis J. P. Smith 1974-5-4 7356 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  UC1552828  Clarkia gracilis Frederica Bowcutt 1985-5-5 506 Colusa ca. 1 mi nw Wilbur Springs Comment
  UCD82739  Clarkia gracilis Craig Thomsen; G. Harrington 2009-5-14 2920 Colusa Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 822 Comment
  CAS-BOT-BC164596  Clarkia gracilis subsp. gracilis C. G. Phillips; L. Cole; S. A. Haultain; K. B. Barrows 1984-4-28 21 Lake Walker Ridge, Indian Valley Access Rd., 1.1 mi. N of Blue Oak Campground 853 Comment
  CDA40181  Clarkia gracilis subsp. gracilis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18538 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 442 Comment
  CDA40185  Clarkia gracilis subsp. gracilis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18566 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  RSA256633  Clarkia gracilis subsp. gracilis Donald Spalinger 1974-5-4 34 Lake Walker Ridge Road, approx. 0.5 mile north from H. 20. 671 Comment
  UCD81172  Clarkia gracilis subsp. gracilis Angela McGinnis; with PLB 102 class 2009-5-3 4 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82386  Clarkia gracilis subsp. gracilis Craig Thomsen; G. Harrington 2009-5-12 2830 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
  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
  CAS-BOT-BC240292  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs 817 Comment
  UC2014170  Clarkia purpurea subsp. quadrivulnera Ellen Dean, G. Harrington, C. Thomsen, Chiao-Yi Cheng, R. Wilmarth 2009-5-20 5650 Colusa Colusa County: Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. Comment
  UCD82122  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5650 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
  UCD82130  Clarkia purpurea subsp. quadrivulnera Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5652 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
  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
  UCD84560  Clarkia purpurea subsp. quadrivulnera Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6085 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  UCR257973  Clarkia purpurea subsp. quadrivulnera Craig D. Thomsen, Gordon Harrington 2009-5-12 2840 Colusa Walker Ridge. Eaton Springs, c. 1 mi east of Walker Ridge Road 707 Comment
  CDA26533  Clarkia unguiculata G. F. Hrusa, R. Gross 2008-5-23 17385 Lake North Coast Ranges; Above Box Cyn. Creek in upper Benmore Canyon, immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101517  Clarkia unguiculata G. F. Hrusa; R. Gross 2008-5-23 17385 Lake Dry bank above Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD81922  Claytonia exigua Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5503 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  CHSC24139  Claytonia exigua subsp. exigua B. Bunge 1976-4-3 2 Lake Growing 3 ft. from Hwy. at intersection of Walker Ridge Rd. and Hwy 20. 457 Comment
  CHSC25155  Claytonia exigua subsp. exigua J. D. Sagray 1970-4-4 5 Colusa 1 mi w of Abbott Mercury Mine on Hwy 20, 2 ft off side of Hwy. 594 Comment
  HSC27224  Claytonia exigua subsp. exigua J. P. Smith 1972-4-8 5189 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31561  Claytonia exigua subsp. exigua Teresa Prendusi 1974-5-4 37 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC32506  Claytonia exigua subsp. exigua Thomas W. Nelson, Jane P. Nelson 1974-4-8 1143 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC41877  Claytonia exigua subsp. exigua Lloyd Simpson 1977-4-23 265 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44415  Claytonia exigua subsp. exigua Barbara Kelly 1977-4-23 321 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66025  Claytonia exigua subsp. exigua D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 27 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66029  Claytonia exigua subsp. exigua S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC66069  Claytonia exigua subsp. exigua Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 19 Lake Along Walker Ridge Rd., 1.3 mi. S of jct. with access road to Indian Valley Dam Comment
  UCSC010465  Claytonia exigua subsp. exigua Dylan M. Neubauer, Tim Forsell 2016-3-31 600 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  HSC41934  Claytonia exigua subsp. glauca E. Cope 1977-4-23 32 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UCD163338  Claytonia parviflora Craig D. Thomsen 2009-5-3 2809 Lake Walker Ridge. North of Til Jones Spring. 990 Comment
  UCD81923  Claytonia parviflora Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5504 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82628  Claytonia parviflora Craig Thomsen; G. Harrington 2009-5-12 2900 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
  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
  CDA9382  Claytonia parviflora subsp. parviflora G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18567 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CHSC32963  Claytonia parviflora subsp. parviflora Terri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 13 Lake Along Walker Ridge Road, 2.66 miles south of junction with access road to Indian Valley Dam. Comment
  HSC31713  Claytonia parviflora subsp. parviflora Teresa Prendusi 1974-5-4 60 Lake 1.5 mi. from jct. to Indian Valley on Walker Ridge 1098 Comment
  HSC41825  Claytonia parviflora subsp. parviflora Rick Cooper 1977-4-23 41 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66018  Claytonia parviflora subsp. parviflora S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66041  Claytonia parviflora subsp. parviflora Joanne Spitler, Patty Powers, Debbie Stamp, Cathy Railey, Cathy Macdonald 1980-4-19 28 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  UCD81195  Claytonia parviflora subsp. parviflora Robinder Aulakh; with PLB 102 class 2009-5-3 7 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 miles down road north of junction with Hwy 20. East side of the road. 731 Comment
  CDA40183  Claytonia parviflora subsp. viridis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18562 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  RSA589942  Claytonia perfoliata Michael A. Vincent, Robert M. Rhode 1996-3-30 7314 Lake Hillside just N of jct Hwy 20 and Walker ridge Road Comment
  CHSC59797  Claytonia spathulata Cynthia D. Seaman 1980-4-12 7 Lake Junction Hwy 20 and Walker Rd, ca 6 mi west of junction Hwy 20 and Hwy 16. Open meadow, north slope. 606 Comment
  HSC66039  Clematis lasiantha Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 31 Lake Along Walker Ridge Rd., 2.65 mi. S of its junction with access road to Indian Valley Dam. Comment
  HSC66638  Clematis lasiantha P. Powers, D. Stamp, J. Spitler, Cathy Railey, C. Macdonald 1980-4-19 7 Lake Coldsprings Campground along access rd. to Indian Valley Dam Comment
  HSC86900  Clematis lasiantha L. Blackford, S. Branch, D. Malm 1988-4-16 55 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  UCD83821  Clematis lasiantha Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5968 Lake Walker Ridge, along Walker Ridge, 1.7 road mi N of Hwy 20. 733 Comment
  UCD95602  Clematis lasiantha D. Boyd; M. Eichelberger, T. Messick, T. Ranker 1980-4-19 25 Lake Along Walker Ridge Road, 2.65 miles south of junction with access road to Indian Valley Dam. Comment
  RSA255864  Clematis ligusticifolia C. W. Tilforth, John Dourley 1975-9-27 1133 Lake 12 miles E of Clear Lake, Hwy 20. 366 Comment
  HSC86892  Collinsia bartsiifolia var. bartsiifolia Pat Daly, Rudy Galindo 1988-4-16 42 Lake 6.1 mi. on Walker Ridge Rd. from Hwy. 20 to Blue Oak Campground 732 Comment
  CHSC7122  Collinsia grandiflora Bryan C. Willingham 1969-4-12 20 Lake Ca. 2000 ft w of Abbot Mine, s side Hwy 20. 585 Comment
  HSC66021  Collinsia grandiflora S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  UCD81721  Collinsia greenei Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5725 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
  HSC31611  Collinsia heterophylla Maralyn O'Meara, Gary S. Lester 1974-5-4 339 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31859  Collinsia heterophylla Gary S. Lester 1974-5-4 135 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC42027  Collinsia heterophylla M. A. Baker 1977-4-23 197 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42248  Collinsia heterophylla Rich White 1977-4-23 28 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42407  Collinsia heterophylla N. G. Sugihara 1977-4-23 19 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42409  Collinsia heterophylla K. Irwin 1977-4-23 289 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC44370  Collinsia heterophylla D. L. Goforth 1977-4-23 22 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66017  Collinsia heterophylla D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 3 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC67109  Collinsia heterophylla S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC75324  Collinsia heterophylla Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC85776  Collinsia heterophylla Bobbi Schnell, Andrea Begnoche, Leonel Arguello 1987-4-11 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd., Blue Oak Campground Comment
  HSC85888  Collinsia heterophylla Sandy Floyd, Tom Munton, T'ai Roulston 1987-4-11 80 Lake Blue Oak Campground, 8 mi. N of Hwy. 20 on Walker Ridge Rd., SE of Indian Valley Reservoir, 50 m up stream from campground Comment
  HSC86969  Collinsia heterophylla L. Blackford, S. Branch, D. Malm 1988-4-16 35 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  HSC89735  Collinsia heterophylla Robin Bencie, James Jones, Rich Dwerlkotte 1989-4-15 9 Lake 7.7 mi. N of Hwy. 20 just W of Walker Ridge Rd., Blue Oak Campground Comment
  HSC90173  Collinsia heterophylla Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-13 42 Lake Blue Oak Campground; Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC95159  Collinsia heterophylla A. Hove, A. Poteet, C. Sanville 1999-5-1 27 Lake Walker Ridge Rd., Blue Oak Recreation Area 537 Comment
  POM273314  Collinsia heterophylla Robert Runyon 1977-4-23 17 Lake 0.4 miles north of State Route 20 on the Walker Ridge Rd. 640 Comment
  RSA408302  Collinsia heterophylla Patty Powers, J. Spitler, D. Stamp, C Macdonald, Cathy Railey 1980-4-19 8 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD81921  Collinsia heterophylla Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5502 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82391  Collinsia heterophylla Craig Thomsen; G. Harrington 2009-5-12 2834 Colusa Colusa County. Walker Ridge. About 200 yds. south of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. 822 Comment
  UCR138667  Collinsia heterophylla M. Brooks, Julie Evens, H. Johnson 1997-3-30 9 Lake Blue Oak Campground 274 Comment
  UCR37947  Collinsia heterophylla Brian Kearney, Mike Malamus, P. Williams 1984-4-28 8 Lake Blue Oak Campground 610 Comment
  HSC85789  Collinsia parviflora Bruce Delgado, Tim Tilgham, Rob Marheine 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd., Blue Oak Campground Comment
  HSC28211  Collinsia sparsiflora J. P. Smith, J. O. Sawyer 1972-4-1 5147 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31402  Collinsia sparsiflora Maralyn O'Meara, Gary S. Lester 1974-5-4 337 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 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
  HSC41893  Collinsia sparsiflora Lloyd Simpson 1977-4-23 274 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66036  Collinsia sparsiflora D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 23 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC82320  Collinsia sparsiflora Thomas W. Nelson, Jane P. Nelson 1978-4-1 3850 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  HSC82327  Collinsia sparsiflora Thomas W. Nelson, Jane P. Nelson 1978-4-1 3857 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD81930  Collinsia sparsiflora Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5511 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  HSC33273  Collinsia sparsiflora var. collina Thomas W. Nelson, Jane P. Nelson 1974-4-8 1153 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC42025  Collinsia sparsiflora var. collina M. A. Baker 1977-4-23 199 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62802  Collinsia sparsiflora var. collina Thomas Wood 1979-4-14 99 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  HSC67111  Collinsia sparsiflora var. collina Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 8 Lake Coldsprings Campground along access rd. to Indian Valley Dam Comment
  HSC69916  Collinsia sparsiflora var. collina Thomas W. Nelson, Jane P. Nelson 1978-4-2 3871 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC72120  Collinsia sparsiflora var. collina J. P. Smith, Jane P. Nelson, Thomas W. Nelson 1978-4-1 9525 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC89705  Collinsia sparsiflora var. collina Levine, Pacheco, Murphey 1989-4-15 26 Lake Blue Oak Campground, between Walker Ridge Rd. and Indian Valley Res. Comment
  UCSC010454  Collinsia sparsiflora var. collina Dylan M. Neubauer, Tim Forsell 2016-3-31 603 Lake (NCoRI) Walker Ridge, Walker Ridge Road, .47 air-mile nne junction with Highway 20 663 Comment
  UCSC010462  Collinsia sparsiflora var. collina Dylan M. Neubauer, Tim Forsell 2016-3-31 607 Lake (NCoRI) Walker Ridge, Walker Ridge Road, .47 air-mile nne junction with Highway 20 663 Comment
  CDA22937  Collinsia sparsiflora var. sparsiflora G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17116 Lake North Coast Ranges; Immed. below Indian Valley Res. spillway into N. Fk. Cache Creek tailrace. 396 Comment
  HSC32527  Collinsia sparsiflora var. sparsiflora Thomas W. Nelson, Jane P. Nelson 1974-4-8 1148 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC42245  Collinsia sparsiflora var. sparsiflora Rich White 1977-4-23 24 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  RSA258896  Collinsia sparsiflora var. sparsiflora Thomas W. Nelson, Jane P. Nelson 1974-4-8 1148 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  UCR138668  Collinsia sparsiflora var. sparsiflora M. Brooks, Julie Evens, H. Johnson 1997-3-30 13 Lake Blue Oak Campground 274 Comment
  CAS-BOT-BC230058  Collomia diversifolia Ellen Dean; K. Mawdsley; G. Harrington; R. Wilmarth; B. Rice; E. Salvia 2009-5-27 5717 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road 833 Comment
  CHSC79786  Collomia diversifolia Todd Bouchier; Kathleen Gifford, Cameron Williams 1999-5-1 30 Lake Walker Ridge Road, 1.6 km south of Blue Oak Recreation Area. 658 Comment
  HSC31583  Collomia diversifolia Thomas E. Higley 1974-5-4 70 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  HSC31615  Collomia diversifolia Maralyn O'Meara, Gary S. Lester 1974-5-4 341 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC31719  Collomia diversifolia Teresa Prendusi 1974-5-4 51 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC45809  Collomia diversifolia J. P. Smith, J. O. Sawyer 1972-4-8 5191 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC47460  Collomia diversifolia J. P. Smith 1978-4-22 9743 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  HSC66064  Collomia diversifolia Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 23 Lake Along Walker Ridge Rd. .5 mi. N of jct. with access Rd. to Indian Valley Dam. Comment
  POM332471  Collomia diversifolia L. E. Philbrick, Cathie Goldberg, Lynn Kunstman, Geoff Walsh 1980-4-19 35 Lake Along Walker Ridge Road, 0.5 miles north of jct. with access road to Indian Valley Dam Comment
  SEINET2444682  Collomia diversifolia D. W. McNeal 1985-5-9 3074 Lake Dry serpentine soil in a steep road cut above Wilber Springs Rd., 0.8 mi. W of the jct of Walker Ridge Rd. N of Hwy 20. Comment
  SEINET2444683  Collomia diversifolia Joanne Spitler, Patty Powers; Debbie Stamp; Cathy Railey; Cathy Macdonald 1980-4-19 30 Lake Along Walker Ridge Road, 0.5 miles N of junction with access road to Indian Valley Dam. Comment
  SEINET3860936  Collomia diversifolia Leigh A. Johnson, Robert L. Johnson 2005-5-23 05 -081 Colusa Walker Ridge Road, west side along a serpentine road cut, about a half mile south of Til Jones Spring.; 0 817 Comment
  UCD110425  Collomia diversifolia Daniel Slakey; CNPS volunteers 2011-6-11 9 Lake Walker Ridge. About 9 km N of Hwy. 20 on Walker Ridge Rd. Along and near small road heading west of Walker Ridge Rd. Border of Lake and Colusa County. 813 Comment
  UCD110428  Collomia diversifolia Daniel Slakey; CNPS volunteers 2011-6-12 10 Lake On roadcut of small ORV trail that connects to Indian Valley Reservoir Rd. About halfway between Walker Ridge Rd and Indian Valley Reservoir. 615 Comment
  UCD118038  Collomia diversifolia D. Boyd; M. Eichelberger, T. Messick, T. Ranker 1980-4-19 35 Lake Along Walker Ridge Road, 1/2 mile N of junction with access road to Indian Valley Dam. Comment
  UCD163340  Collomia diversifolia Craig D. Thomsen 2009-5-3 2811 Lake Walker Ridge, just south of Cold Spring Mountain 6.5 miles north of Hwy 20. Vicinity of Walker Ridge Rd. Along fire break road, just south of guard rail. 1066 Comment
  UCD74342  Collomia diversifolia G. Ledyard Stebbins 1968-5-10 6686 Colusa South end of Walker Ridge, north of Hwy 20. Near headwaters of Sulphur Creek. (Note: notebook says date of collection was 10 May. Labels made by Stebbins at CAS say 15 May.) 762 Comment
  UCD81711  Collomia diversifolia Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5717 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCD81856  Collomia diversifolia Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5740 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  UCD82526  Collomia diversifolia Craig Thomsen; G. Harrington 2009-5-12 2882 b 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. 710 Comment
  UC2042496  Cordylanthus pilosus Holly Forbes and Barbara Keller 2009-7-1 Colusa Walker Ridge Rd about 6.2 mi. N of junction with Highway 20. Comment
  UCD81723  Cordylanthus pilosus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5727 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
  UCD81942  Cordylanthus pilosus Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5523 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD84448  Cornus glabrata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6056 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD84428  Crocanthemum scoparium Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6043 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  UCD82109  Croton setiger Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5637 Lake 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. 818 Comment
  UCD84442  Cryptantha Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6047 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
  CAS-BOT-BC230052  Cryptantha clevelandii Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5619 Lake 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 821 Comment
  UCD81917  Cryptantha clevelandii Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5498 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 731 Comment
  UCD82092  Cryptantha clevelandii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5619 Lake 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. 821 Comment
  UCD82106  Cryptantha clevelandii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5634 Lake 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. 818 Comment
  UCD83720  Cryptantha clevelandii Joseph Schlottman; with PLB 102 class 2010-5-2 6 Colusa East slope of Walker Ridge. Eaton Springs area. Southern part of valley, near old road. 713 Comment
  UCD84551  Cryptantha clevelandii Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6149 Colusa Walker Ridge. Just south of radio tower on Cold Spring Mountain. 945 Comment
  UCR257979  Cryptantha clevelandii Ellen Dean, PLB 102 students 2009-5-3 5498 Lake Walker Ridge, along Walker Ridge Road, c. 1.9 road mi north of intersection with Hwy 20 732 Comment
  UC2014136  Cryptantha dissita Ellen Dean, G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5947 Lake Lake County: Walker Ridge. Along Walker Ridge Road. At a lookout that overlooks Indian Valley Reservoir that is located 8.3 road miles N of the intersection of Hwy 20. Comment
  UCD83749  Cryptantha dissita Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5947 Lake Walker Ridge. Along Walker Ridge Road. At a lookout that overlooks Indian Valley Reservoir that is located 8.3 road miles N of the intersection of Hwy 20. 1054 Comment
  CDA40148  Cryptantha flaccida G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18568 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD82485  Cryptantha flaccida Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5672 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
  JEPS117094  Cryptantha hispidula Peter Warner 2010-5-16 159 Colusa Walker Ridge Rd., ~ 8.3 km N of jct. with Hwy 20, ~ 1 km N of jct. w/ Indian Valley Reservoir Rd. at road-cut, both sides and adjacent slopes Comment
  UCD82513  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2871 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82520  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2877 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCD82527  Cryptantha hispidula Craig Thomsen; G. Harrington 2009-5-12 2883 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCD82532  Cryptantha intermedia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5684 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD163839  Cryptantha intermedia var. intermedia Craig D. Thomsen 2001-4-12 2469 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  HSC49858  Cryptantha microstachys J. P. Smith, J. O. Sawyer 1978-4-29 9763 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  JEPS90323  Cryptantha microstachys Dean W. Taylor 1972-5-8 1403 Lake on Walker Ridge Walker Ridge 1127 Comment
  UCD82374  Cryptantha muricata Craig Thomsen; G. Harrington 2009-5-12 2816 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 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
  GH356001  Cupressus macnabiana J. Silba 2002-10-25 B- 276 Unknown Lake Co., south-east of Barkerville, ca. 1/4 mile north of Route 20 along Walker Ridge Road 609 Comment
  UCD110851  Cupressus macnabiana Christopher Mallek 2008-1 WR- 1 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD133538  Cupressus macnabiana R. Robichaux 1975-4-10 36 Lake Walker Ridge Road, 6.8 miles NNW of junction wuith State Hwy 20. Comment
  UCD67665  Cupressus macnabiana D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. 850 Comment
  UC1585395  Cupressus sargentii R. Raiche 1989-11-1 90339 Colusa W of Williams, NW of Wilbur Springs, Walker Ridge, Freshwate Branch of E Fork Sulphur Creek between Signal Rock and Oak Grove 730 Comment
  HSC42032  Cynoglossum grande Rich White 1977-4-23 32 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66034  Cynoglossum grande S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC66691  Cynoglossum grande Cathy Railey, Patty Powers, Debbie Stamp, Joanne Spitler, Cathy Macdonald 1980-4-19 9 Lake Coldsprings Campground, along access road to Indian Valley Dam; N-facing slopes Comment
  RSA273420  Cynoglossum grande M. A. Baker 1977-4-23 202 Lake 0.4 miles north of State Route 20 on the Walker Ridge road. 640 Comment
  UCD119165  Cynoglossum grande G. F. Hrusa 1992-2-29 9057 Lake Above Blue Oak Camp, Indian Valley. Comment
  UCD81933  Cynoglossum grande Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5514 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCR257978  Cynoglossum grande Ellen Dean, PLB 102 students 2009-5-3 5514 Lake Walker Ridge, along Walker Ridge Road, c. 1.9 road mi north of intersection with Hwy 20 756 Comment
  UCD84568  Cynosurus echinatus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6093 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  CDA40156  Dactylis glomerata G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18587 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 438 Comment
  UCD84543  Dactylis glomerata Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6142 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  CDA40142  Datisca glomerata G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18574 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD81715  Datisca glomerata Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5721 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
  CDA40172  Daucus pusillus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18559 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  UCD81075  Daucus pusillus Catherine Yasuda; with PLB 102 class 2009-5-3 6 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCD82725  Daucus pusillus Craig Thomsen; G. Harrington 2009-5-14 2908 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
  HSC89682  Delphinium decorum subsp. tracyi William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake 7.7 mi. N of Hwy. 20, just W of Walker Ridge Rd., Blue Oak Campground 152 Comment
  HSC27439  Delphinium hesperium J. P. Smith, J. O. Sawyer 1972-4-1 5146 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31857  Delphinium hesperium Maralyn O'Meara, Gary S. Lester 1974-5-4 328 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC33272  Delphinium hesperium Thomas W. Nelson, Jane P. Nelson 1974-4-8 1152 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC41694  Delphinium hesperium J. P. Smith 1974-5-4 7361 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC42037  Delphinium hesperium Rich White 1977-4-23 22 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66060  Delphinium hesperium S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC69776  Delphinium hesperium R. Kalal 1979-4-14 86 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC72119  Delphinium hesperium J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9524 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC75316  Delphinium hesperium Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC82324  Delphinium hesperium Thomas W. Nelson, Jane P. Nelson 1978-4-1 3854 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  HSC99819  Delphinium hesperium John Rehling, Robert M. Specht Mar 1975 140 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  RSA398650  Delphinium hesperium Lloyd Simpson 1977-4-23 266 Lake 0.4 mi N of State Rt 20 on the Walker Ridge Rd. 640 Comment
  RSA398651  Delphinium hesperium Carolyn Sanford 1977-4-23 339 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  HSC92589  Delphinium hesperium subsp. pallescens Moulton, Sparks, Wood 1995-5-6 35 Lake Blue Oak Campground 549 Comment
  CDA9393  Delphinium nudicaule G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18590 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  HSC75711  Delphinium nudicaule D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 17 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC41879  Delphinium patens Lloyd Simpson 1977-4-23 272 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  CDA40159  Delphinium patens subsp. patens G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18543 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 137 Comment
  UC1585383  Delphinium uliginosum R. Raiche 1989-6-20 90163 Colusa near Eaton Spring (w of Williams, n of Wilbur Springs); Walker Ridge, Deadshot Flat 710 Comment
  UCD163354  Delphinium uliginosum Craig D. Thomsen 2000-5-11 2346 Lake Walker Ridge. Cold Springs area, BLM campground. Comment
  UCD82510  Delphinium uliginosum Craig Thomsen; G. Harrington 2008-5-12 2868 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CHSC32953  Delphinium variegatum Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 28 Lake Along Walker Ridge Road, 1.0 mile north of junction with access road to Indian Valley Dam. Meadow. Comment
  RSA256629  Delphinium variegatum Teresa Prendusi 1974-5-4 43 Lake Walker Ridge, 0.5 miles N of jct with State Route 20. 671 Comment
  CHSC81546  Delphinium variegatum subsp. variegatum Julie Rose 2000-4-1 60 Lake Slope off of Walker Ridge Road. 606 Comment
  UCD81074  Delphinium variegatum subsp. variegatum Catherine Yasuda; with PLB 102 class 2009-5-3 5 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82458  Delphinium variegatum subsp. variegatum Craig Thomsen; G. Harrington 2009-5-12 2836 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  JEPS82284  Deschampsia cespitosa subsp. cespitosa Roger Raiche 1982-3-20 20245 Colusa Walker Ridge Comment
  CDA40153  Dicentra chrysantha G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18598 Lake North Coast Ranges; Slopes above Indian Valley Reservoir, along access rd. Sheet 2 of 2. 557 Comment
  CDA40154  Dicentra chrysantha G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18598 Lake North Coast Ranges; Slopes above Indian Valley Reservoir, along access rd. Sheet 1 of 2. 557 Comment
  UCD81929  Dichelostemma capitatum Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5510 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  HSC27178  Dichelostemma capitatum subsp. capitatum J. P. Smith, J. O. Sawyer 1972-4-1 5112 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 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
  HSC41880  Dichelostemma capitatum subsp. capitatum Lloyd Simpson 1977-4-23 273 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66649  Dichelostemma capitatum subsp. capitatum Cathie Goldberg, Lauren Philbrick, Lynn Kuntsman, Geoff Walsh 1980-4-19 9 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC69918  Dichelostemma capitatum subsp. capitatum Thomas W. Nelson, Jane P. Nelson 1978-4-2 3869 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC75323  Dichelostemma capitatum subsp. capitatum Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCR37948  Dichelostemma capitatum subsp. capitatum Mike Malamus, P. Williams, B. Kearney 1984-4-28 6 Lake Blue Oak Campground 610 Comment
  HSC66066  Dichelostemma congestum S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 0.5 mi. N of junction with access rd. to Indian Valley Dam Comment
  HSC67102  Dichelostemma congestum S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  CDA40174  Dichelostemma volubile G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18558 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  HSC31871  Dichelostemma volubile Gary S. Lester 1974-5-4 123 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC41866  Dichelostemma volubile K. Irwin 1977-4-23 292 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC44859  Dichelostemma volubile J. P. Smith 1974-5-4 7350 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 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
  CHSC59607  Diplacus douglasii Glen Holstein 1978-5-6 Lake Walker Ridge Road, ca. 1.5 miles north of State Highway 20. 731 Comment
  CAS-BOT-BC153242  Diplacus kelloggii Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-1 20 Lake Walker Ridge, Blue Oak Campground off of Indian Reservoir Rd. 542 Comment
  CAS-BOT-BC153244  Diplacus kelloggii D. Haskamp; E. Sonnenblick; M. Taft 1995-4-1 11 Lake Blue Oak campground on Walker Ridge Rd. Area of Benmore Canyon Creek approx. 200 m east of campsites Comment
  CHSC12160  Dodecatheon hendersonii L. M. Mayer 1973-3-31 78 Lake On the s side of the road 11.3 mi e of junction 53 and 20 on Hwy 20. 335 Comment
  CHSC79808  Dodecatheon hendersonii Leanna Brown 1999-3-9 42 Lake Walker Ridge. 623 Comment
  HSC27449  Dodecatheon hendersonii J. P. Smith, J. O. Sawyer 1972-4-1 5133 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC33269  Dodecatheon hendersonii Thomas W. Nelson, Jane P. Nelson 1974-4-8 1155 Lake Ca. 200 m east of Oasis Resort and 13 mi. E of Clear Lake Oaks; along Hwy. 20 Comment
  HSC62766  Dodecatheon hendersonii M. Dean Griswold Jr. 1979-4-14 1 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC62820  Dodecatheon hendersonii J. M. DiTomaso 1979-4-14 862 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66642  Dodecatheon hendersonii Cathie Goldberg, Geoff Walsh, Lauren Philbrick, Lynn Kunstman 1980-1 21 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  UCD112600  Dodecatheon hendersonii Christopher Mallek 2008-4-17 WR2- 5 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCR139075  Dodecatheon hendersonii E. Brower, S. Marubayashi, E. Perry 1997-3-30 016 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  HSC100076  Dudleya cymosa William Kristan, Brian Marston, Reid Storre 1988-4-15 39 Lake 6.1 mi. on Walker Ridge Rd. off of Hwy. 20 in Blue Oak Campground Comment
  HSC66639  Dudleya cymosa Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 24 Lake Coldsprings Campground, along access road to Indian Valley Dam 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
  HSC87060  Dudleya cymosa subsp. cymosa Anthony J. Desch, Bryon Cariss 1988-4-16 30 Lake 6.1 mi. from Hwy. 20 on Walker Ridge Rd. in Blue Oak Campground. 579 Comment
  HSC36202  Ehrendorferia chrysantha John Rehling 1975-6-2 90 Lake Along Walker Ridge Rd., 2 mi. from Hwy. 20 Comment
  UCD81943  Ehrendorferia chrysantha Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5524 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82102  Ehrendorferia chrysantha Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5629 Lake 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. 821 Comment
  CAS-BOT-BC242632  Eleocharis montevidensis Ellen Dean; K. Mawdsley; G. Harrington; R. Wilmarth; B. Rice; E. Salvia 2009-5-27 5752 Lake Walker Ridge. Picnic area near Cold Spring 912 Comment
  UCD81871  Eleocharis montevidensis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5752 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  CHSC101524  Elymus caput-medusae G. F. Hrusa; R. Gross 2008-5-23 17401 Lake Open dry flats along Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD82516  Elymus elymoides Craig Thomsen; G. Harrington 2009-5-12 2874 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CAS-BOT-BC247093  Elymus glaucus Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5673 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 869 Comment
  UCD82486  Elymus glaucus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5673 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  CDA26540  Elymus multisetus G. F. Hrusa, R. Gross 2008-5-23 17398 Lake North Coast Ranges; Middle Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101541  Elymus multisetus G. F. Hrusa; R. Gross 2008-5-23 17398 Lake Flat along road in middle Benmore Canyon immediately E and S of Indian Valley Reservoir spillway. 457 Comment
  UCD81878  Elymus trachycaulus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5758 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  HSC67108  Emmenanthe penduliflora D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 30 Lake Along Walker Ridge Rd., 1.3 mi. S of junction with access road to Indian Valley Dam. Comment
  SEINET232464  Emmenanthe penduliflora Margaret J. Williams, Wayne Roderick 1984-5-23 84- 18 -2 Lake Walker Ridge Rd. 640 Comment
  UCD82384  Emmenanthe penduliflora Craig Thomsen; G. Harrington 2009-5-12 2825 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
  UCD81084  Emmenanthe penduliflora var. penduliflora Kalynda Stone; with PLB 102 class 2009-5-3 8 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCD82133  Epilobium brachycarpum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5663 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  CHSC71440  Epilobium densiflorum Vernon H. Oswald; Lowell Ahart 1998-7-15 9303 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In a meadow. 792 Comment
  JEPS94756  Epilobium densiflorum Vernon H. Oswald and Lowell Ahart 1998-7-15 9303 Colusa 6.3 mi n of Highway 20 (w side of Walker Ridge Road 8.2 mi s of Bartlett Springs Road); Walker Ridge Road 792 Comment
  UCD82627  Epilobium foliosum Craig Thomsen; G. Harrington 2009-5-12 2898 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  HSC31457  Epilobium minutum Maralyn O'Meara 1974-5-4 321 Lake Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31685  Epilobium minutum Gary S. Lester 1974-5-4 137 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  JEPS89970  Epilobium minutum Dean W. Taylor 1972-5-15 1408 Lake on Walker Ridge Walker Ridge 1127 Comment
  RSA256638  Epilobium minutum Donald Spalinger 1974-5-4 41 Lake Walker Ridge Road 1.5 miles north of Little Indian Valley Road. 1098 Comment
  UCD81733  Epilobium minutum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5735 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
  UCR138663  Epilobium pallidum B. Ellyson, J. Hooke, D. Newman 1996-5-4 36 Lake Benmore Canyn. 1.4 mi west of Walker Ridge Road on Indian Reservoir Road; 57 mi east of Hwy 101 on Hwy 20 683 Comment
  UCD84424  Epilobium torreyi Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6040 Lake Walker Ridge. Along Walker Ridge Road, 0.6 road mi N of intersection with Hwy 20. E side of the road. 662 Comment
  UCD82570  Eriastrum tracyi Tom Zavortink; Gordon Harrington 2009-5-25 s. n. Colusa East side and downslopte of Walker Ridge Road just NE of Til Jones Spring. 779 Comment
  CAS-BOT-BC287465  Ericameria greenei Ananda Dickie; et al. 1996-5-4 50 Lake 1.4 miles W of Walker Ridge Rd, on Indian Res Rd; 57 miles E of Hwy 101 on Highway 20 682 Comment
  CAS-BOT-BC287619  Ericameria linearifolia Jeanne McFarland; Kathie Meyer; Anne Mullenniex 1995-4-1 5 Lake Walker Ridge, on N-facing slope 150' above Blue Oak Campground 579 Comment
  CDA11387  Ericameria linearifolia G. F. Hrusa, K. van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges; Walker Ridge Road approximately 3 miles N of Highway 20. Comment
  CHSC35579  Ericameria linearifolia J. P. Smith; Tom Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge road, 3.2 miles from its junction with State Route 20. Comment
  HSC36604  Ericameria linearifolia John Rehling, Robert M. Specht 1976-3-25 138 Lake 6 mi. N on Walker Ridge Rd. from Hwy. 20 Comment
  HSC36835  Ericameria linearifolia John Rehling, Robert M. Specht 1976-3-25 138 Lake 6 mi. N on Walker Ridge Rd. from Hwy. 20 Comment
  HSC66037  Ericameria linearifolia Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 28 Lake Along Walker Ridge Rd., 2.65 mi. S of its junction with access road to Indian Valley Dam. Comment
  HSC72122  Ericameria linearifolia J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 mi. from its junction with State Route 20. Comment
  HSC85764  Ericameria linearifolia R. Earing, C. Cavanaugh, C. Collins 1987-4-11 44 Lake Walker Ridge, 1.5 mi. E of Blue Oak Campground Comment
  HSC85780  Ericameria linearifolia Jeff Dunk, Tallchief Comet, David Munger 1987-4-11 58 Colusa 1.4 mi. E of Blue Oak Campground on Walker Ridge Rd. off Hwy. 20 Comment
  HSC85812  Ericameria linearifolia Sandy Floyd, Tom Munton, T'ai Roulston 1987-4-11 78 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd. at Blue Oak Campground Comment
  HSC85859  Ericameria linearifolia Tim Tilghman, Rob Marheine, Bruce Delgado 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walder [Walker?] Ridge Rd., SE of Indian Valley Reservoir, Blue Oak Campground Comment
  HSC90022  Ericameria linearifolia Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-14 47 Lake Blue Oak Campground; Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC90064  Ericameria linearifolia Amy Austin, Tony LaBanca, Noreen McClintock 1990-4-14 38 Lake Blue Oak Campground on Indian Valley Reservoir Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC95319  Ericameria linearifolia Todd Bouchier, Kathleen Gifford, Cameron Williams 1999-5-1 26 Lake Blue Oak Recreation Area; Walker Ridge Rd. 12.8 km. from Hwy. 20 536 Comment
  HSC95330  Ericameria linearifolia A. Miles, M. Malle, B. Gibbs 1999-5-1 27 Lake Blue Oak Rec. Area; Walker Ridge Rd., 1/2 km. N of campground 536 Comment
  RSA293106  Ericameria linearifolia Thomas W. Nelson, Jane P. Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 miles from its junction with State Route 20 Comment
  RSA589927  Ericameria linearifolia Michael A. Vincent, Robert Rhode 1996-3-30 7310 Colusa Along Walker Ridge Road, 11.5 miles S of junction with Brim Road Comment
  RSA671050  Ericameria linearifolia G. Fred Hrusa 1995-4-2 12107 Colusa On Walker Ridge Road approx. 3 miles N of Highway 20 950 Comment
  UCD131145  Ericameria linearifolia G. F. Hrusa; K. Van Katwyk 1995-4-22 12107 Colusa Inner North Coast Ranges. 950 Comment
  UCD163349  Ericameria linearifolia Craig D. Thomsen 2000-5-12 2329 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  UCR80265  Ericameria linearifolia J. P. Smith, Thomas Nelson, Jane Nelson 1978-4-1 9527 Colusa Walker Ridge Road, 3.2 mi. from its junction with State Route 20. Comment
  UCD84636  Erigeron greenei G. Harrington 2009-7-7 84 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones spring area on W side of road. Ca 6.5 road miles N of junction with Hwy 20. W side of road. 833 Comment
  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
  CAS-BOT-BC216121  Eriodictyon californicum Clare R. Wheeler 1978-4-29 263 Lake Walker Ridge, Colusa Cunty boundary 609 Comment
  CHSC71430  Eriodictyon californicum Vernon H. Oswald; Lowell Ahart 1998-7-15 9308 Lake East side of county of Walker Ridge Rd. 9.8 mi south of Bartlett Springs Rd., 4.6 mi north of Hwy. 20. Along this section of road. 792 Comment
  HSC31974  Eriodictyon californicum Donald Spalinger 1974-5-4 35 Lake Walker Ridge Rd., 0.5 mi. N from Hwy. 20 671 Comment
  HSC41928  Eriodictyon californicum Ed Cope 1977-4-23 45 Lake Comment
  HSC44270  Eriodictyon californicum D. L. Goforth 1977-4-23 25 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC49857  Eriodictyon californicum J. P. Smith, J. O. Sawyer 1978-4-29 9764 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  HSC66022  Eriodictyon californicum S. Harris, M. Moble, B. Ferguson, S. Smith 1980-4-19 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66581  Eriodictyon californicum D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 7 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC96885  Eriodictyon californicum J. Carey, A. Hong, J. Leffingwell 1995-5-6 79 Lake 250 m N up Indian Valley access rd from Blue Oak recreation Site sign, W side of road 549 Comment
  JEPS93799  Eriodictyon californicum Vernon H. Oswald and Lowell Ahart 1998-7-15 9308 Lake East side of county on Walker Ridge Road 9.8 mi south of Bartlett Springs Road, 4.6 mi n of Highway 20 792 Comment
  RSA273331  Eriodictyon californicum Rich White 1977-4-23 33 Lake 0.4 miles north of State Route 20 on the Walker Ridge Road. 640 Comment
  UC2042511  Eriodictyon californicum Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 4.4 miles N from its intersection with Highway 20. Comment
  UCD84550  Eriodictyon californicum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6148 Colusa Walker Ridge. Along Walker Ridge Road at Cold Spring Mountain radio tower area. 1082 Comment
  NY243175  Eriogonum ampullaceum J. L. Reveal 1972-7-18 2788 Mono Along California Highway 120, 3.4 miles west of Benton and U.S. Highway 6, and 1.6 miles northeast of Benton Hot Springs. 1767.8 Comment
  SD86304  Eriogonum ampullaceum James L. Reveal, Caroline G. Reveal 1972-7-18 2788 Mono Along California Highway 120, 3.4 miles west of Benton and U.S. Highway 6, and 1.6 miles northeast of Benton Hot Springs 1768 Comment
  SEINET5324289  Eriogonum ampullaceum J. L. Reveal, C. G. Reveal 1972-7-18 2788 Mono Along California Hwy 120, 3.4 mi W of Benton and U.S. Hwy 6, and 1.6 mi NE of Benton Hot Springs 1768 Comment
  UC1395235  Eriogonum ampullaceum James L. Reveal, Caroline G. Reveal 1972-7-18 2788 Mono 1.6 mi ne Benton Hot Springs (along Clifornia Highway 120, 3.4 mi w of Benton and U.S. Highway 6) 1767 Comment
  UCD99668  Eriogonum ampullaceum James L. Reveal; Caroline G. Reveal 1972-7-18 2788 Mono along California Highway 120, 3.4 miles west of Benton and U.S. Highway 6 and 1.6 miles NE of Benton Hot Springs. 1767 Comment
  NY243066  Eriogonum brachyanthum J. L. Reveal 1972-7-18 2789 Mono Along California Highway 120, 3.4 miles west of Benton and U.S. Highway 6, and 1.6 miles northeast of Benton Hot Springs. 1767.8 Comment
  CAS-BOT-BC242594  Eriogonum dasyanthemum James L. Reveal 1988-6-2 6983 Lake Walker Ridge Road, 0.5 mile north of California Highway 20, about 10.5 air miles northeast of Clearlake Highlands and 21.5 air miles west of Arbuckle 655 Comment
  CHSC91021  Eriogonum dasyanthemum D. Isle 1997-6-30 305 Lake Mendocino National Forest--North Coast Ranges. North Fork Cache Creek Watershed. Summit of Walker Ridge Rd. E edge of Rd. Solar panels, 2 bldgs., 3 antennae, area SW of bldgs. 609 Comment
  POM279914  Eriogonum dasyanthemum Lyman Benson 1933-6-26 4489 Colusa Abbott mine. 549 Comment
  UC1552830  Eriogonum dasyanthemum Frederica Bowcutt 1985-5-5 509 Colusa ca. 1 mi nw Wilbur Springs Comment
  UCD82091  Eriogonum dasyanthemum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5618 Lake 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. 821 Comment
  UCD82736  Eriogonum dasyanthemum Craig Thomsen; G. Harrington 2009-5-14 2917 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  CDA21529  Eriogonum luteolum G. F. Hrusa, R. Gross 2008-5-23 17452 Lake North Coast Ranges; Indian Valley Reservoir Rd. above Reservoir, just above Blue Oak Campground. 594 Comment
  CHSC101549  Eriogonum luteolum G. F. Hrusa; R. Gross 2008-5-23 17452 Lake Roadside on Indian Valley Reservoir Rd. within chaparral above Reservoir, just above Blue Oak Campground. 594 Comment
  UCD163314  Eriogonum wrightii Craig D. Thomsen 1997-4-13 1903 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  CDA26531  Eriophyllum lanatum var. achilleoides G. F. Hrusa, R. Gross 2008-5-23 17391 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101521  Eriophyllum lanatum var. achilleoides G. F. Hrusa; R. Gross 2008-5-23 17391 Lake West slope at crossing of Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  HSC31576  Eriophyllum lanatum var. achilleoides Teresa Prendusi 1974-5-4 29 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31592  Eriophyllum lanatum var. achilleoides Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  HSC31958  Eriophyllum lanatum var. achilleoides Gary S. Lester 1974-5-4 126 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC47550  Eriophyllum lanatum var. achilleoides J. P. Smith, J. O. Sawyer 1978-4-29 9766 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  HSC66640  Eriophyllum lanatum var. achilleoides Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 23 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC90018  Eriophyllum lanatum var. achilleoides Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-14 48 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  UCD81081  Eriophyllum lanatum var. achilleoides Kalynda Stone; with PLB 102 class 2009-5-3 4 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCR37968  Eriophyllum lanatum var. achilleoides K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 3 Lake Walker Ridge, Blue Oak Campground, 23 mi. NE of Clearlake Oaks via State Route 20 & Walker Ridge Rd., Wilbur Springs 15' Q. 610 Comment
  HSC27423  Erodium cicutarium J. P. Smith, J. O. Sawyer 1972-4-1 5123 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41847  Erodium cicutarium N. G. Sugihara 1977-4-23 17 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC41872  Erodium cicutarium Richard G. Runyon 1977-4-23 37 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC66020  Erodium cicutarium S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC67110  Erodium cicutarium Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 10 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD82123  Erodium cicutarium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5651 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  UCR37895  Erodium cicutarium subsp. jacquinianum C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-28 14 Lake Walker Ridge, Blue Oak Campground, 23 mi NE of Clearlake Oaks via SR20 and Walker Ridge Road, Wilbur Springs 15' Q. 610 Comment
  GH379584  Erysimum capitatum S. Harris, M. Moble, B. Ferguson & M. Smith 1980-4-19 Unknown along Walker Ridge Road, 3.7 miles north of junction with access road to Indian Valley Dam Comment
  UC725539  Erysimum capitatum A. A. Heller 1941-5-5 16103 Lake bank on State Hwy 20 4 mi w the County Line Comment
  UCD163847  Erysimum capitatum Craig D. Thomsen 2000-5-30 2273 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CHSC24669  Erysimum capitatum var. capitatum D. E. Hale 1976-3-30 20 Lake On n side of Hwy 20, intersection of Walker Ridge Rd and Hwy 20. 424 Comment
  CHSC27820  Erysimum capitatum var. capitatum M. Jeanne Boze 1978-4-8 6 Lake Jct. Hwy 20 and Walker Ridge Rd., ca. 6 mi w of jct of Hwys 20 and 16. 606 Comment
  CHSC90627  Erysimum capitatum var. capitatum Leo J. Edson 1988-4-9 18 Lake Junction of Hwy 20 and Walker Ridge Road, about 6 mi west of junction of Hwy 20 and Hwy 16. 606 Comment
  HSC31394  Erysimum capitatum var. capitatum Maralyn O'Meara, Gary S. Lester 1974-5-4 351 Lake Walker Ridge Rd., 1.5 mi. N from junction with Little Indian Valley Rd., 0.2 mi. S from Cold Spring Mtn. 1098 Comment
  HSC36911  Erysimum capitatum var. capitatum John Rehling, Robert M. Specht 1976-3-20 144 Lake Along Hwy. 20 at the turnoff to Walker Ridge Rd. Comment
  HSC66046  Erysimum capitatum var. capitatum Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 34 Lake Along Walker Ridge Rd., 3.7 mi. N of junction with access road to Indian Valley Dam Comment
  UCD81855  Erysimum capitatum var. capitatum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5739 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  CDA9395  Eschscholzia caespitosa G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18592 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  HSC66031  Eschscholzia caespitosa S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC86968  Eschscholzia caespitosa L. Blackford, S. Branch, D. Malm 1988-3-16 57 Lake 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  UCD82626  Eschscholzia caespitosa Craig Thomsen; G. Harrington 2009-5-12 2896 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
  UCR139076  Eschscholzia caespitosa E. Brower, S. Marubayashi, E. Perry 1997-3-30 013 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  UCR37886  Eschscholzia caespitosa K. Faber, Scott LaChance, Mike Rekart 1984-4-28 7 Lake Blue Oak Campground. 23 mi NE of Clearlake 610 Comment
  HSC44264  Eschscholzia californica J. Walker 1977-4-23 21 Lake .4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCD83653  Eschscholzia californica Wenting Shi; with PLB 102 class 2010-5-2 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20. West side of the road where there is a turnaround and remnants of old road on saddle. 652 Comment
  HSC89702  Eschscholzia lobbii Eric German, Klara Varga, Michele Cardinaux 1989-4-15 30 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 152 Comment
  JEPS82274  Euphorbia crenulata Roger Raiche 1983-5-22 30339 Lake w side Walker Ridge summit (stream along Bartlett Springs Road, feeding into Indian Valley Reserovir); Indian Valley Reservoir 304 Comment
  UCD163848  Euphorbia crenulata Craig D. Thomsen 2000-5-30 2275 b Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD81867  Euphorbia lathyris Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5750 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  HSC41950  Euphorbia spathulata Richard G. Runyon 1977-4-23 18 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  UCD81876  Euphorbia spathulata Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5756 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD82503  Euphorbia spathulata Craig Thomsen; G. Harrington 2009-5-12 2863 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82573  Extriplex joaquinana Craig Thomsen 2008-6-12 2764 Colusa Walker Ridge, near Elgin Mine on Lucientes property. 655 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
  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
  HSC31977  Frangula californica subsp. crassifolia Gary S. Lester 1974-5-4 128 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC60182  Frangula californica subsp. tomentella J. P. Smith, J. O. Sawyer 1971-6-6 4733 Lake Scenic vista point along crest of Walker Ridge. Comment
  UCD83623  Frangula californica subsp. tomentella Adam Clause; with PLB 102 class 2010-5-2 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20. West side of the road where there is a turnaround and remnants of old road on saddle. 652 Comment
  HSC41854  Fraxinus dipetala K. Irwin 1977-4-23 293 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC66135  Fraxinus dipetala Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 47 Colusa On Bartlett Springs Rd. Comment
Read comments Aug 13 2014
  HSC95713  Fraxinus dipetala A. Burgard, J. Goldsmith, J. Kalt 1996-3-30 27 Lake Blue Oak Campground 5.3mi W of Walker Ridge Rd. on Indian Reservoir Rd., 57mi E of Hwy. 101 on Hwy. 20 549 Comment
  SFV18552  Fraxinus dipetala J. B. Belsher, P. C. Nichols, J. Kendall 1997-4-26 24 Lake North Coast Ranges Roadside along Indian Valley access Road, 2.5 miles past intersection of access road and Walker Ridge Road. 550 Comment
  UCD81702  Fraxinus dipetala Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5711 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCSC010455  Fraxinus dipetala Dylan M. Neubauer, Tim Forsell 2016-3-31 602 Lake (NCoRI) Walker Ridge, Walker Ridge Road, .72 air-mile n junction with Highway 20 688 Comment
  HSC27153  Fritillaria affinis J. P. Smith, J. O. Sawyer 1972-4-1 5160 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC67124  Fritillaria affinis M. Smith, S. Harris, B. Ferguson, M. Moble 1980-4-19 Lake Along Walker Ridge Rd. 0.5 mi. N of junction with access road to Indian Valley Dam Comment
  HSC69911  Fritillaria affinis Thomas W. Nelson, Jane P. Nelson 1978-4-2 3874 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  RSA293156  Fritillaria affinis Thomas W. Nelson, Jane P. Nelson 1978-4-2 3874 Lake Along Walker Ridge Road 6 miles north of junction with State Route 20 Comment
  UCD112596  Fritillaria affinis Christopher Mallek 2008-4-17 WR2- 6 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD81705  Fritillaria affinis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5713 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
  UCSC010485  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  UCSC010486  Fritillaria affinis Dylan M. Neubauer, Tim Forsell 2016-3-31 598 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  CAS-BOT-BC130433  Fritillaria pluriflora James Jokerst 1985-4-10 2229 Colusa Near Walker Ridge Comment
  CHSC25545  Fritillaria pluriflora Robert A. Schlising 1977-4-8 3188 Lake Walker Ridge, along road 0.5 mi n of jct with Hwy 20 near Colusa County line. Comment
  HSC33040  Fritillaria pluriflora Thomas W. Nelson, James Nelson 1975-3-26 1773 Lake 200 m E of the Oasis Resort 13 mi. E of Clear Lake Oaks on Hwy. 20 Comment
  HSC36476  Fritillaria pluriflora John Rehling, Robert M. Specht 1976-3-18 337 Lake 0.5 mi. on Walker Ridge Rd. near Hwy. 20 Comment
  HSC38224  Fritillaria pluriflora John Rehling, Robert M. Specht 1976-3-19 139 Lake 0.5 mi. on Walker Ridge Rd. near Hwy 20 Comment
  SDSU20645  Fritillaria pluriflora Sean Ryan 2011-3-20 80 Lake E side of Walker Ridge Rd., 0.5 mi N of its intersection with HWY 20. 668 Comment
  UCD139707  Fritillaria pluriflora Kim E. Steiner 1979-4-1 288 Lake Walker Ridge Rd., 0.5 mi. N of State Hwy 20. 670 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
  HSC27156  Fritillaria purdyi J. P. Smith, J. O. Sawyer 1972-4-1 5159 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC42251  Fritillaria purdyi K. Irwin 1977-4-23 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC67131  Fritillaria purdyi S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 0.5 mi. N of junction with access rd. to Indian Valley Dam Comment
  HSC69780  Fritillaria purdyi R. Kalal 1979-4-14 81 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  UCD139711  Fritillaria purdyi Kim E. Steiner 1978-3-30 176 Lake ca. 25 m above Walker Ridge Road, 5.9 miles north of State Highway 20. Comment
  UCR37894  Fritillaria purdyi C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-28 16 Lake Walker Ridge. Indian Valley Access Road, 1.1 mi. north of Blue Oak Campground, Wilbur Springs 15' Q. 854 Comment
  UCSC010483  Fritillaria purdyi Dylan M. Neubauer, Tim Forsell 2016-3-31 599 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  UCSC010484  Fritillaria purdyi Dylan M. Neubauer, Tim Forsell 2016-3-31 599 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  HSC41930  Galium andrewsii Ed Cope 1977-4-23 39 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC49111  Galium andrewsii J. P. Smith, J. O. Sawyer 1978-4-29 9772 Lake Lake-Colusa County line, Walker Ridge Rd., 0.4 mi. from T-intersection to Indian Valley Reservoir. Comment
  POM367646  Galium andrewsii Barbara Kelly 1977-4-23 333 Lake 0.4 miles N of State Rte 20 on the walker Ridge Rd. 640 Comment
  HSC31574  Galium andrewsii subsp. andrewsii Teresa Prendusi 1974-5-4 26 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31590  Galium andrewsii subsp. andrewsii Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  HSC31706  Galium andrewsii subsp. andrewsii Thomas E. Higley 1974-5-4 50 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  UCD81090  Galium andrewsii subsp. andrewsii Michael Raines; with PLB 102 class 2009-5-3 5 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCR37892  Galium andrewsii subsp. andrewsii C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-28 18 Lake Walker Ridge. Indian Valley Access Road, 1.1 mi. north of Blue Oak Campground, Wilbur Springs 15' Q. 854 Comment
  CDA40167  Galium aparine G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18564 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CDA9394  Galium aparine G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18571 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  HSC27440  Galium aparine J. P. Smith, J. O. Sawyer 1972-4-1 5135 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41933  Galium aparine Ed Cope 1977-4-23 33 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62809  Galium aparine J. M. DiTomaso 1979-4-14 870 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66690  Galium aparine Debbie Stamp, Joanne Spitler, Patty Powers, Cathy Railey, Cathy Macdonald 1980-4-19 1 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  POM367758  Galium aparine D. Boyd, M. Eichelberger, T. Messick, T. Ranker 1980-4-19 8 Lake Coldsprings Campgrond, along access road to Indian Valley Dam. Comment
  UCD82724  Galium aparine Craig Thomsen; G. Harrington 2009-5-14 2907 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
  UCD121826  Galium nuttallii Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 15 Lake Along Walker Ridge Road, 2.65 miles south of junction with access road to Indian Valley Dam. Comment
  UCD82120  Galium parisiense Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5648 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
  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
  UCD82478  Galium parisiense Craig Thomsen; G. Harrington 2009-5-12 2856 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CDA22923  Galium porrigens G. F. Hrusa, R. Gross 2008-5-23 17404 Lake North Coast Ranges; Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  HSC62812  Galium porrigens J. M. DiTomaso 1979-4-14 866 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  RSA259572  Galium porrigens Thomas W. Nelson, Jane Nelson 1974-4-8 1140 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  HSC27162  Galium porrigens var. porrigens J. P. Smith, J. O. Sawyer 1972-4-1 5155 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31577  Galium porrigens var. porrigens Teresa Prendusi 1974-5-4 30 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC35587  Galium porrigens var. porrigens Thomas W. Nelson, Jane P. Nelson 1974-4-8 1140 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC66040  Galium porrigens var. porrigens Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 32 Lake Along Walker Ridge Rd., 2.65 mi. S of its junction with access road to Indian Valley Dam. Comment
  CHSC101544  Galium porrigens var. tenue G. F. Hrusa; R. Gross 2008-5-23 17404 Lake Flats along Box Canyon Creek in upper Benmore Canyon immediately E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC32945  Galium porrigens var. tenue Patty Powers; C. Railey, Joanne Spitler, D. Stamp, C. Macdonald 1980-4-19 26 Lake Along Walker Ridge Road, 2.65 miles south of junction with access road to Indian Valley Dam. Comment
  UCD81079  Galium porrigens var. tenue Kalynda Stone; with PLB 102 class 2009-5-3 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  HSC41857  Garrya buxifolia K. Irwin 1977-4-23 294 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  CAS-BOT-BC199037  Garrya congdonii Milo S. Baker 1947-4-6 11655 Lake Williams Highway #20 at crossing of Bear Cr. Comment
  HSC24873  Garrya congdonii J. P. Smith, J. O. Sawyer 1972-2-12 5052 Lake Walker Ridge Rd. Comment
  HSC27150  Garrya congdonii J. P. Smith, J. O. Sawyer 1972-4-1 5165 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31869  Garrya congdonii Gary S. Lester 1974-5-4 120 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC69619  Garrya congdonii R. Kalal 1979-4-14 72 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC82316  Garrya congdonii Thomas W. Nelson, Jane P. Nelson 1978-4-1 3844 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD163842  Garrya congdonii Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD81077  Garrya congdonii Catherine Yasuda; with PLB 102 class 2009-5-3 4 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  CAS-BOT-BC178549  Garrya flavescens A. Burgard; J. Goldsmith; J. Kalt 1996-3-30 17 Colusa Walker Ridge Rd. 4.1 mi. north of intersection with Indian Reservoir Rd. 57 mi. east of Hwy. 101 on Hwy. 20. 938 Comment
  RSA245294  Garrya flavescens subsp. congdonii J. P. Smith, J. O. Sawyer 1972-2-12 5052 Lake Walker Ridge Road. Comment
  RSA296703  Garrya flavescens subsp. congdonii Rick Lundquist 1979-4-14 9 Lake 0.4 mile north of State Route 20 on the Walker Ridge Road. 640 Comment
  HSC101442  Garrya fremontii A. Miles, B. Gibbs, M. Malle 1999-3-27 8 Lake 4.5 miles SE of Blue Oak Recreational Area 822 Comment
  HSC24875  Garrya fremontii J. P. Smith, J. O. Sawyer 1972-2-12 5054 Lake Walker Ridge Rd. S of Baldy Mtn. near boundary of Lake and Colusa Co. Comment
  CDA40171  Gastridium phleoides G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18547 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  UCD82084  Gayophytum humile Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5611 Lake 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. 821 Comment
  CDA9370  Geranium dissectum G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18570 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 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
  UCD81936  Gilia capitata Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5517 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82541  Gilia capitata Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5697 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  CDA9391  Gilia capitata subsp. capitata G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18583 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 438 Comment
  HSC27174  Gilia tricolor J. P. Smith, J. O. Sawyer 1972-4-1 5119 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31856  Gilia tricolor Maralyn O'Meara, Gary S. Lester 1974-5-4 329 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC32501  Gilia tricolor Thomas W. Nelson, Jane P. Nelson 1974-4-8 1146 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC36909  Gilia tricolor John Rehling, Robert M. Specht 1976-3-24 142 Lake 1/2 mi. N on Walker Ridge Rd. from Hwy. 20 Comment
  HSC41895  Gilia tricolor Lloyd Simpson 1977-4-23 263 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44263  Gilia tricolor D. L. Goforth 1977-4-23 9 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC46064  Gilia tricolor Catherine Chin 1978-4-22 21 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 610 Comment
  HSC49026  Gilia tricolor Patricia Shesgreen 1978-4-22 18 Lake .6 mi. up Walker Ridge Rd. off Hwy. 20 Comment
  HSC62781  Gilia tricolor J. M. DiTomaso 1979-4-14 869 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66014  Gilia tricolor Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 9 Lake Coldsprings Campground along access rd. to Indian Valley Dam Comment
  HSC66051  Gilia tricolor C. McDonald, P. Powers, C. Raley, D. Stamp, J. Spitler 1980-4-19 32 Lake Along Walker Ridge Rd. 0.5 mi. N of junction with access road to Indian Valley Dam Comment
  HSC66059  Gilia tricolor Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 40 Lake Along Walker Ridge Rd., 1 mi. N of its junction with access road to Indian Valley Dam Comment
  HSC66136  Gilia tricolor S. Harris, B. Ferguson, M. Moble, M. Smith 1980-4-19 Colusa Bartlett Springs Rd. Comment
  HSC69769  Gilia tricolor R. Kalal 1979-4-14 80 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC75292  Gilia tricolor Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC82329  Gilia tricolor Thomas W. Nelson, Jane P. Nelson 1978-4-1 3859 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  HSC85785  Gilia tricolor Bruce Delgado, Tim Tilghman, Rob Marheine 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd., Blue Oak Campground Comment
  RSA258900  Gilia tricolor Thomas W. Nelson, Jane P. Nelson 1974-4-8 1146 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  RSA296707  Gilia tricolor M. A. Ericksen 1979-4-14 204 Lake Wilbur Springs Quadrangle. 0.4 miles north of State Route 20 on the Walker Ridge Road. 640 Comment
  RSA469710  Gilia tricolor Carolyn Sanford 1977-4-23 342 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  UCD82484  Gilia tricolor Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5671 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  CDA40186  Gnaphalium palustre G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18551 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD81880  Grindelia camporum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5760 Lake Walker Ridge. Picnic area near Cold Spring. 912 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
  CAS-BOT-BC302201  Harmonia hallii G. L. Stebbins 1971-6-6 8013 Colusa South end of Walker Ridge, near Clyde Mine 914 Comment
  JEPS117118  Harmonia hallii Peter Warner 2010-5-16 155 Colusa Walker Ridge Rd., ~ 8.3 km N of jct. with Hwy. 20; ~ 1 km N of jct. w/ Indian Valley Reservoir Rd., at road-cut, both sides and adjacent slopes Comment
  UCD163348  Harmonia hallii Craig D. Thomsen 2000-5-11 2341 Lake Walker Ridge. 3 miles southwest of Windtun Campground turnoff, Til Jones Spring area. Comment
  UCD82590  Harmonia hallii Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2735 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  UCD81863  Hastingsia alba Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5746 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCR257980  Hastingsia alba Ellen Dean, Kate F. Mawdsley, Gordon Harrington, R. Wilmarth, Barry Rice, E. Salvia 2009-5-27 5746 Lake North Coast Range, Walker Ridge, picnic area near Cold Spring 913 Comment
  UCD82440  Helenium Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 a Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCD83665  Helenium Craig Thomsen; G. Harrington 2009-5-12 2859 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD81866  Helenium bigelovii Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5749 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UC924977  Helianthus bolanderi Annetta Carter 1951-8-26 3079 Colusa Southwest of Leesville (hills at the w side of Bear Valley); North Coast Ranges, Bear Valley 450 Comment
  UCD82509  Hemizonia Craig Thomsen; G. Harrington 2009-5-12 2867 b Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  HSC31850  Hemizonia congesta subsp. clevelandii Maralyn O'Meara, Gary S. Lester 1974-5-4 333 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  JEPS12555  Hemizonia congesta subsp. clevelandii R. F. Hoover 1938-6-11 3596 Colusa Williams-Lake Co. hwy at junction Wilbur Sprs. road Comment
  UCD159329  Hemizonia congesta subsp. luzulifolia D. S. Park 2010-6-5 113 Colusa Colusa County.: Walker ridge, Cold Spring Mt. roadside, grassland. 781 Comment
  UCD81192  Hemizonia congesta subsp. luzulifolia Robinder Aulakh; with PLB 102 class 2009-5-3 4 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82492  Hemizonia congesta subsp. luzulifolia Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5680 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  HSC27283  Hesperocyparis macnabiana J. P. Smith, J. O. Sawyer 1972-4-1 5170 Lake 7.2 mi. N of junction of Hwy. 20 and and Walker Ridge Rd. Comment
  HSC66055  Hesperocyparis macnabiana D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 40 Lake Along Walker Ridge Rd., 1 mi. N of junction with access to Indian Valley Dam Comment
  HSC69912  Hesperocyparis macnabiana Thomas W. Nelson, Jane P. Nelson 1978-4-2 3875 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  UCD81735  Hesperocyparis macnabiana Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5737 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  HSC41925  Hesperocyparis sargentii Ed Cope 1977-4-23 48 Lake Walker Ridge Rd. Comment
  UCD82529  Hesperolinon Craig Thomsen; G. Harrington 2009-5-12 2885 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. 710 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
  POM268794  Hesperolinon bicarpellatum Lyman Benson 1932-6-12 3660 Lake Colusa Line - Abbot Mine. N. Fork Cache Creek watershed. 457 Comment
  CHSC67249  Hesperolinon californicum James D. Jokerst 1985-5-17 2354 Lake Walker Ridge Serpentine, W of road ca. 150 m where it bends around a serpentine hill curving gently from E to W. 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
  UC1212460  Hesperolinon californicum Helen K. Sharsmith 1953-6-17 4248 Colusa on State Hwy 20 ca 100 ft s origin of Wilbur Springs road; Inner North Coast Ranges, Bear Creek 320 Comment
  CDA21516  Hesperolinon disjunctum G. F. Hrusa, R. Gross 2008-5-23 17449 Lake North Coast Ranges; Above N. Fk. Cache Cr. +/- 1/2 mi. below spillway of Indian Valley Reservoir. 423 Comment
  CDA26527  Hesperolinon disjunctum G. F. Hrusa, R. Gross 2008-5-23 17388 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101548  Hesperolinon disjunctum G. F. Hrusa; R. Gross 2008-5-23 17388 Lake W slope at crossing of Box Canyon Creek in upper Benmore Canyon immediately E and S of Indiana Valley Reservoir spillway. 457 Comment
  CHSC32920  Hesperolinon disjunctum James P. Smith; John Sawyer 1971-6-6 4732 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road. Comment
  CHSC88554  Hesperolinon disjunctum L. P. Janeway 2001-6-6 7128 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  HSC68102  Hesperolinon disjunctum J. P. Smith, J. O. Sawyer 1971-6-6 4732 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC95484  Hesperolinon disjunctum James D. Jokerst 1985-5-17 2354 Lake Walker Ridge Serpentine, W of Rd. ca. 150 m where it bends around a serpentine hill curving gently from E to W Comment
  RSA700361  Hesperolinon disjunctum L. P. Janeway 2001-6-6 7128 Colusa Deadshot Spring, about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  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
  UCD82089  Hesperolinon disjunctum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5616 Lake 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. 821 Comment
  UCD82139  Hesperolinon disjunctum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5679 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD84549  Hesperolinon disjunctum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6147 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
  UCD110423  Hesperolinon drymarioides Daniel Slakey; CNPS volunteers 2011-6-11 8 Lake Walker Ridge. About 9 km N of Hwy. 20 on Walker Ridge Rd. Near small road heading west from Walker Ridge Rd. 807 Comment
  UCD110522  Hesperolinon drymarioides P. Rodriguez-Rojo 1997-7-25 s.n. Colusa Walker Ridge Rd. 890 Comment
  UCD81732  Hesperolinon drymarioides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5734 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
  UCD82110  Hesperolinon drymarioides Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5638 Lake 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. 818 Comment
  UCD163331  Hesperolinon micranthum Craig D. Thomsen 2009-5-3 2800 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD81698  Hesperolinon micranthum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5708 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCD83448  Hesperolinon micranthum Craig Thomsen; G. Harrington 2009-5-14 2888 Colusa Colusa County on Walker Ridge: Eaton Springs, about 1 mile east of Walker Ridge Road. 710 Comment
  HSC31702  Heteromeles arbutifolia Thomas E. Higley 1974-5-4 56 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC41856  Heteromeles arbutifolia K. Irwin 1977-4-23 286 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  UC2042506  Heteromeles arbutifolia Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Rd, 6.1 miles N from its intersection with Hwy 20 Comment
  UCD84542  Hirschfeldia incana Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6141 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  UCD164138  Hordeum brachyantherum Craig Thomsen 1997-4-20 1927 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82472  Hordeum brachyantherum Craig Thomsen; G. Harrington 2009-5-12 2848 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CDA40165  Hordeum brachyantherum subsp. brachyantherum G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18582 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CHSC106241  Hordeum brachyantherum subsp. californicum B. Castro; L. P. Janeway 2001-6-3 1260 Colusa Inner North Coast Ranges. 'Til Jones Spring' at headwaters of Freshwater Branch of E. Fork Sulphur Ck, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 Comment
  JEPS118603  Hordeum brachyantherum subsp. californicum B. Castro, L. P. Janeway 2001-6-3 1260 Colusa Inner North Coast Ranges. Til Jones Spring at headwaters of Freshwater Branch of E. Fork Sulphur Creek, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Wilbur Springs 7.5' quad. Comment
  UCD81901  Hordeum marinum Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5482 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  CDA40179  Hordeum marinum subsp. gussoneanum G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18552 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 442 Comment
  CDA40180  Hordeum marinum subsp. gussoneanum G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18557 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 442 Comment
  HSC27452  Hordeum murinum subsp. glaucum J. P. Smith, J. O. Sawyer 1972-4-1 5139 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC39879  Hordeum murinum subsp. leporinum J. P. Smith, J. O. Sawyer 1972-4-1 5139 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  UCD81872  Horkelia californica var. elata Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5753 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD82589  Horkelia californica var. elata Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2734 Colusa Walker Ridge. About 3.2 mi N of Hwy 20, adjacent to abandoned road leading back to Walker Ridge Rd. from 'Oak Cove. 822 Comment
  UCD82460  Hypochaeris glabra Craig Thomsen; G. Harrington 2009-5-12 2838 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  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
  HSC49110  Iris macrosiphon J. P. Smith, J. O. Sawyer 1978-4-29 9771 Lake Lake-Colusa County line, Walker Ridge Rd., 0.4 mi. from T-intersection to Indian Valley Reservoir. Comment
  HSC66068  Iris macrosiphon Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 38 Lake Along Walker Ridge Rd., 0.5 mi. N of junction with access road to Indian Valley Dam Comment
  RSA256676  Iris macrosiphon Maralyn O'Meara, Gary S. Lester 1974-5-4 342 Colusa Walker Ridge Road, ca. 0.7 mile from junction with Little Indian Valley Road 854 Comment
  RSA298331  Iris macrosiphon C. Mcdonald, P. Powers, C. Raley, D. Stamp, J. Spitler 1980-4-19 31 Lake Along Walker Ridge Road, 0.5 miles north of junction with access road to Indian Valley Dam Comment
  SEINET3875317  Iris macrosiphon Thomas E. Higley 1974-5-4 066 Colusa 3/4 miles north of T junction of Indian Valley.; 0 853 Comment
  UCD138770  Iris macrosiphon Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 27 Lake along Walker Ridge Road, 0.5 mile north of junction with access road to Indian Valley Dam. Comment
  UCD82523  Iris macrosiphon Craig Thomsen; G. Harrington 2009-5-12 2880 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East- facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCR37891  Iris macrosiphon K. B. Barrows, C. G. Phillips, L. Cole, S. A. Haultain 1984-4-28 17 Lake Walker Ridge, Indian Valley Access Road, 1.1 mi north of Blue Oak Campground. 854 Comment
  UCD81860  Juglans californica Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5744 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  CHSC71509  Juncus bufonius var. congestus Vernon H. Oswald; Lowell Ahart 1998-7-15 9305 Colusa West side of county on Walker Ridge Rd. 8.2 mi south of Bartlett Springs Rd., 6.3 mi north of Hwy. 20. In meadow. 792 Comment
  JEPS93871  Juncus bufonius var. congestus Vernon H. Oswald and Lowell Ahart 1998-7-15 9305 Colusa w side of county on Walker Ridge Road 8.2 mi s of Bartlett Springs Road (6.3 mi n of Highway 20); Walker Ridge Road 792 Comment
  UCD81870  Juncus oxymeris Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5751 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  CDA26538  Juncus patens G. F. Hrusa, R. Gross 2008-5-23 17407 Lake North Coast Ranges; Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101539  Juncus patens G. F. Hrusa; R. Gross 2008-5-23 17407 Lake Along Box Canyon Creek in upper Benmore Canyon immediately E and S of Indian Valley Reservoir spillway. 457 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
  UCD82439  Juncus patens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5665 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
  CHSC83447  Juncus xiphioides Bill Maslach 2001-6-6 10 Lake North side of Hwy. 20, Glenhaven. Next to Clear Lake. In roadside ditch. 400 Comment
  HSC27434  Juniperus californica J. P. Smith, J. O. Sawyer 1972-4-1 5141 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC66584  Juniperus californica D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 12 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  UCD163315  Juniperus californica Craig D. Thomsen 1997-4-13 1904 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  HSC32508  Juniperus occidentalis Thomas W. Nelson, Jane P. Nelson 1974-4-8 1141 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
Read comments Jul 25 2018
  HSC101454  Juniperus occidentalis var. australis A. Hove, A. Poteet, C. Sanville 1999-3-27 4 Lake Walker Ridge Road, Blue Oak Recreation Area 537 Comment
Read comments Jul 25 2018
  RSA258849  Juniperus occidentalis var. occidentalis Thomas W. Nelson, Jane P. Nelson 1974-4-8 1141 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  UCD81877  Koeleria macrantha Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5757 Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD82476  Lactuca Craig Thomsen; G. Harrington 2009-5-12 2854 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CDA26537  Lagophylla minor G. F. Hrusa, R. Gross 2008-5-23 17451 Lake North Coast Ranges; Slope above N. Fk. Cache Cr. +/- 1/2 mi. below spillway of Indian Valley Reservoir. 423 Comment
  CHSC101529  Lagophylla minor G. F. Hrusa; R. Gross 2008-5-23 17451 Lake NE-facing chaparral slope above North Fork Cache Creek +/- 1/2 mile below spillway of Indian Valley Reservoir. 423 Comment
  CHSC79666  Lagophylla minor A. Miles; G. Gibbs, M. Malle 1999-5-1 29 Lake Walker Ridge Road, 1.6km south of Blue Oaks Recreation Area. 658 Comment
  HSC31529  Lagophylla minor Maralyn O'Meara 1974-5-4 312 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31565  Lagophylla minor Teresa Prendusi 1974-5-4 38 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31851  Lagophylla minor Gary S. Lester 1974-5-4 125 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC90052  Lagophylla minor Rohmer, Grefsrud, Reed 1990-4-15 53 Lake Indian Valley Reservoir access road, 15 mi. NE of intersection with Walker Ridge Rd. 689 Comment
  JEPS89773  Lagophylla minor Dean W. Taylor 1972-5-8 1406 Lake on Walker Ridge Walker Ridge 1127 Comment
Read comments Sep 8 2009
  RSA256642  Lagophylla minor Bonnie Prange 1974-5-4 s.n. Lake Near Walker Ridge Road, 0.5 mile north of jct with Hwy 20 671 Comment
  UCD81087  Lagophylla minor Michael Raines; with PLB 102 class 2009-5-3 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82162  Lagophylla minor Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5694 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCD82519  Lagophylla minor Craig Thomsen; G. Harrington 2009-5-12 2876 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  HSC66139  Lagophylla ramosissima D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 6 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  JEPS94648  Lagophylla ramosissima Vernon H. Oswald and Lowell Ahart 1998-7-15 9306 Lake on Walker Ridge Rd. 9.8 mi s Bartlett Springs Rd. (4.6 mi n of Hwy 20, e side of county) 792 Comment
  JEPS94777  Lagophylla ramosissima Vernon H. Oswald and Lowell Ahart 1998-7-15 9306 Lake on Walker Ridge Rd. 9.8 mi s Bartlett Springs Rd. (4.6 mi n of Hwy 20, e side of county) 792 Comment
  UCD159332  Lagophylla ramosissima D. S. Park 2010-6-5 116 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  CHSC71418  Lagophylla ramosissima subsp. congesta Vernon H. Oswald; Lowell Ahart 1998-7-15 9306 Lake East side of county on Walker Ridge Rd. 9.8 mi south of Bartlett Springs Rd., 4.6 mi north of Hwy. 20. Road cut. 792 Comment
  CDA9378  Lamium amplexicaule G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18580 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  HSC27173  Lasthenia californica J. P. Smith, J. O. Sawyer 1972-4-1 5108 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31571  Lasthenia californica Teresa Prendusi 1974-5-4 22 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC32502  Lasthenia californica Thomas W. Nelson, Jane P. Nelson 1974-4-8 1147 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC42252  Lasthenia californica K. Irwin 1977-4-23 333 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC62810  Lasthenia californica Thomas Wood 1979-4-14 101 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  HSC66593  Lasthenia californica S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC67091  Lasthenia californica Debbie Stamp, Joanne Spitler, Cathy Railey, Patty Powers, Cathy Macdonald 1980-4-19 5 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC90414  Lasthenia glabrata C. Wilson, P. Kittleson, M. Hardig 1992-4-11 41 Lake Blue Oak Recreation Site, 6.5 mi. N of Hwy. 20 on Walker Ridge Rd. 488 Comment
  UC90075  Lasthenia gracilis K. C. Brandegee May 1883 Colusa Sulphur Creek Comment
  UCD81913  Lasthenia gracilis Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5494 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 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
  UCR37890  Lasthenia gracilis C. G. Phillips, L. Cole, S. A. Hautain, K. B. Barrows 1984-4-28 22 Lake Walker Ridge, Indian Valley Access Road, 1.1 mi. north of Blue Oak Campground, Wilbur Springs 15' Q. 854 Comment
  CDA40160  Lathyrus jepsonii var. californicus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18569 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD81710  Lathyrus jepsonii var. californicus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5716 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
  UCD82127  Lathyrus jepsonii var. californicus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5656 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
  UCD84567  Lathyrus vestitus Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6092 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 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-BC329323  Layia septentrionalis James Jokerst 1985-4-10 2227 Colusa Near Walker Ridge. 547 Comment
  CDA40177  Layia septentrionalis G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18539 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 442 Comment
  HSC62791  Lepidium dictyotum Phyllis Krieg 1979-4-14 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC27179  Lepidium lasiocarpum J. P. Smith, J. O. Sawyer 1972-4-1 5110 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC44115  Lepidium lasiocarpum Barbara Kelly 1977-4-23 375 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC82319  Lepidium lasiocarpum Thomas W. Nelson, Jane P. Nelson 1978-4-1 3849 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  CHSC115375  Lepidium latipes var. latipes Lowell Ahart 2015-4-10 20022 Lake Normal size plants, on damp bare soil, along the drainage. 696 Comment
  HSC72121  Lepidium nitidum J. P. Smith, Thomas W. Nelson, Jane P. Nelson 1978-4-1 9526 Lake Walker Ridge Rd., 0.5 mi. from its junction with Hwy. 20 671 Comment
  HSC31705  Leptosiphon bicolor Thomas E. Higley 1974-5-4 51 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC42080  Leptosiphon bicolor E. Cope 1977-4-23 28 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC46916  Leptosiphon bicolor Sheila Logan 1978-4-21 202 Lake E side of Walker Ridge Rd., 0.6 mi. from Hwy. 20 610 Comment
  HSC47463  Leptosiphon bicolor J. P. Smith 1978-4-22 9740 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  HSC62795  Leptosiphon bicolor Rick Lundquist 1979-4-14 11 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC63010  Leptosiphon bicolor M. Dean Griswold Jr. 1979-4-14 2 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  CHSC3961  Leptosiphon ciliatus M. Lee 1967-4-29 21 Lake On N. side of Hwy 20 ca. 26 mi. west of Williams. 426 Comment
  HSC27422  Leptosiphon ciliatus J. P. Smith, J. O. Sawyer 1972-4-1 5129 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41883  Leptosiphon ciliatus M. A. Baker 1977-4-23 200 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC41902  Leptosiphon ciliatus Lloyd Simpson 1977-4-23 278 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42194  Leptosiphon ciliatus Rich White 1977-4-23 27 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66019  Leptosiphon ciliatus S. Harris, M. Moble, B. Ferguson, M. Smith 1980-4-19 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66027  Leptosiphon ciliatus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 24 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC89701  Leptosiphon ciliatus Eric German, Klara Varga, Michele Cardinaux 1989-4-15 26 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 152 Comment
  RSA256622  Leptosiphon ciliatus Teresa Prendusi 1974-5-4 46 Lake Walker Ridge, 0.5 miles N of jct with State Route 20. 671 Comment
  HSC31586  Leptosiphon latisectus Thomas E. Higley 1974-5-4 74 Lake 1/4 mi. S of Colds Springs Mtn. 1159 Comment
  HSC66047  Leptosiphon latisectus Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 35 Lake Along Walker Ridge Rd., 3.7 mi. N of junction with access road to Indian Valley Dam Comment
  HSC89712  Leptosiphon latisectus Eric German, Klara Varga, Michele Cardinaux 1989-4-15 33 Lake Lake/Colusa Co. line, 7 mi. S of Brim Rd. on Walker Ridge Rd. 915 Comment
  JEPS123230  Leptosiphon latisectus David Gowen 2010-6-14 1128 Colusa Serpentine road bank along ridgetop of Walker Ridge Road Comment
  UCD118846  Leptosiphon latisectus G. L. Stebbins 1983-5-15 s.n. Lake summit of Walker Ridge. Comment
  HSC31712  Leptosiphon parviflorus Teresa Prendusi 1974-5-4 62 Lake 1.5 mi. from jct. to Indian Valley on Walker Ridge 1098 Comment
  UCD81858  Leptosiphon parviflorus Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5742 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  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
  CHSC88557  Lessingia ramulosa L. P. Janeway 2001-6-6 7126 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  HSC25616  Lessingia ramulosa J. P. Smith, J. O. Sawyer 1971-6-6 4727 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. 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
  UC2014145  Lessingia ramulosa Ellen Dean, C. Thomsen, T. Hansen, windfarm meeting 2010-6-11 6145 Colusa Colusa County. Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. Comment
  UCD84547  Lessingia ramulosa Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6145 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
  UCD84559  Lessingia ramulosa Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6084 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Springs. Many old undeveloped roads here. 817 Comment
  HSC27155  Lewisia rediviva J. P. Smith, J. O. Sawyer 1972-4-1 5158 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31308  Lewisia rediviva Carter Schleicher 1974-5-4 25 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  HSC66061  Lewisia rediviva Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 46 Lake Along Walker Ridge Rd., 1 mi. N of jct. with access road to Indian Valley Dam Comment
  UCD81857  Lewisia rediviva Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5741 Colusa Walker Ridge. Along Walker Ridge Road. Lookout area with fence and view of Indian Valley Reservoir. North of turnoff to Indian Valley Reservoir and S of turnoff to picnic area. W side of road. 1061 Comment
  UCR37939  Lewisia rediviva Brian Kearney, Mike Malamus, P. Williams 1984-4-28 70 Lake 1.1 mi north of Blue Oak Campground on Indian Valley Access Rd. 854 Comment
  UCD164136  Leymus triticoides Craig Thomsen 1998-6-12 1940 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82495  Linanthus Craig Thomsen; G. Harrington 2009-5-12 2845 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UC1552835  Linanthus bolanderi Frederica Bowcutt 1985-4-10 480 Lake approx 10 mi e Clear Lake (1 mi n of Hwy 20, and 45 mi ne of Santa Rosa); Walker Ridge Comment
  CDA40184  Linanthus ciliatus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18549 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  UCR37941  Linanthus ciliatus Brian Kearney, Mike Malamus, P. Williams 1984-4-28 75 Lake Blue Oak Campground on Indian Access Road 854 Comment
  UCR138661  Linanthus parviflorus B. Ellyson, J. Hooke, D. Newman 1996-3-30 10 Lake Benmore Canyon. 1.4 mi west of Walker Ridge Road on Indian Reservoir Road; 57 mi east of Hwy 101 on Hwy 20 Comment
  HSC27447  Lithophragma affine J. P. Smith, J. O. Sawyer 1972-4-1 5130 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC32509  Lithophragma affine Thomas W. Nelson, Jane P. Nelson 1974-4-8 1139 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC62942  Lithophragma affine David Wheeler 1979-4-14 51 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC66654  Lithophragma affine Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 6 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC66594  Lithophragma heterophyllum S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC31613  Lithophragma parviflorum Maralyn O'Meara, Gary S. Lester 1974-5-4 340 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC69775  Lithophragma parviflorum R. Kalal 1979-4-14 87 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC47551  Logfia filaginoides J. P. Smith, J. O. Sawyer, 1978-4-29 9765 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  UCD159333  Logfia filaginoides D. S. Park 2010-6-5 117 Colusa Walker ridge, Cold Spring Mt. roadside and adjacent grassland. 760 Comment
  UCD82378  Logfia filaginoides Craig Thomsen; G. Harrington 2009-5-12 2820 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 Comment
  UCD81915  Logfia gallica Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5496 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 731 Comment
  UCD82094  Logfia gallica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5621 Lake 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. 821 Comment
  UCD84544  Lolium multiflorum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6143 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 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
  HSC25618  Lomatium ciliolatum var. hooveri J. P. Smith, J. O. Sawyer 1971-6-6 4730 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC27159  Lomatium ciliolatum var. hooveri J. P. Smith, J. O. Sawyer 1972-4-1 5156 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31302  Lomatium ciliolatum var. hooveri Carter Schleicher 1974-5-4 13 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31572  Lomatium ciliolatum var. hooveri Teresa Prendusi 1974-5-4 21 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31840  Lomatium ciliolatum var. hooveri Maralyn O'Meara, Gary S. Lester 1974-5-4 346 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC36908  Lomatium ciliolatum var. hooveri John Rehling, Robert Specht 1976-3-26 143 Lake 1/2 mi. on Walker Ridge Rd. near Hwy 20 Comment
  HSC38855  Lomatium ciliolatum var. hooveri J. P. Smith 1974-5-4 7353 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC42024  Lomatium ciliolatum var. hooveri M. A. Baker 1977-4-23 201 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42071  Lomatium ciliolatum var. hooveri E. Cope 1977-4-23 36 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44255  Lomatium ciliolatum var. hooveri Barbara Kelly 1977-4-23 326 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC45675  Lomatium ciliolatum var. hooveri Stephen Plant 1978-4-22 202 Lake 0.6 mi. up Walker Ridge Road, of Hwy 20, 50 ft N of the road 640 Comment
  HSC47461  Lomatium ciliolatum var. hooveri J. P. Smith 1978-4-22 9742 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  HSC62814  Lomatium ciliolatum var. hooveri J. M. DiTomaso 1979-4-14 864 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66065  Lomatium ciliolatum var. hooveri Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 26 Lake Along Walker Ridge Rd. .5 mi. N of jct. with access Rd. to Indian Valley Dam. Comment
  HSC67089  Lomatium ciliolatum var. hooveri Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 37 Lake Along Walker Ridge Road, 0.5 mi. N of junction with access road to Indian Valley Dam Comment
  HSC69920  Lomatium ciliolatum var. hooveri Thomas W. Nelson, Jane P. Nelson 1978-4-2 3867 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC82317  Lomatium ciliolatum var. hooveri Thomas W. Nelson, Jane P. Nelson 1978-4-1 3846 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD81097  Lomatium ciliolatum var. hooveri Ryan Abe; with PLB 102 class 2009-5-3 52 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD81701  Lomatium dasycarpum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5710 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  UCD163350  Lomatium dissectum Craig D. Thomsen 2000-5-12 2332 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  CHSC25562  Lomatium hooveri Robert A. Schlising 1977-4-8 3189 Lake Walker Ridge, along road 0.5 mi n of jct with Hwy 20 near Colusa County line. Comment
  CHSC27626  Lomatium hooveri Timothy Spira; Robert A. Schlising 1978-5-13 3241 Lake Near Colusa County line in E side Lake County, 0.5 mi N of Hwy 20 on Wlaker Ridge Road. Comment
  CHSC79438  Lomatium hooveri Simona Altman 1999-4-3 57 Lake Walker Ridge. 701 Comment
  RSA256610  Lomatium hooveri Bonnie Prange 1974-5-4 s.n. Lake Near Walker Ridge Road, 0.5 mile north of jct with Hwy 20 671 Comment
  RSA452570  Lomatium hooveri Dwain L. Goforth 1977-4-23 20 Lake 0.4 mile north of State Route 20 on Walker Ridge Road. 640 Comment
  UCD163312  Lomatium hooveri Craig D. Thomsen 1997-4-18 1901 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD74305  Lomatium hooveri G. L. Stebbins 1971-6-6 s.n. Lake Walker Ridge, north of Clyde Mine. 914 Comment
  UCD81911  Lomatium hooveri Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5492 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCSC010456  Lomatium hooveri Dylan M. Neubauer, Tim Forsell 2016-3-31 601 Colusa (NCoRI) Walker Ridge, Walker Ridge Road, 1.96 air-miles sse Cold Spring Mountain 820 Comment
  CAS-BOT-BC230056  Lomatium macrocarpum Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5683 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 843 Comment
  CHSC27627  Lomatium macrocarpum Timothy Spira; Robert Schlising 1978-5-13 3242 Lake Near Colusa County line on E side Lake Co., 0.5 mi N of Hwy 20, on Walker Ridge Road. Comment
  HSC25613  Lomatium macrocarpum J. P. Smith, J. O. Sawyer 1971-6-6 4725 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC27436  Lomatium macrocarpum J. P. Smith, J. O. Sawyer 1972-4-1 5152 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC38875  Lomatium macrocarpum J. P. Smith, J. O. Sawyer 1972-4-1 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC41914  Lomatium macrocarpum M. A. Baker 1977-4-23 187 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44254  Lomatium macrocarpum Barbara Kelly 1977-4-23 335 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC67104  Lomatium macrocarpum Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 5 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC82331  Lomatium macrocarpum Thomas W. Nelson, Jane P. Nelson 1978-4-1 3864 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD82531  Lomatium macrocarpum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5683 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  HSC40710  Lomatium utriculatum Barbara Kelly 1977-4-23 323 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC40711  Lomatium utriculatum Barbara Kelly 1977-4-23 380 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC40712  Lomatium utriculatum Barbara Kelly 1977-4-23 334 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC40713  Lomatium utriculatum Barbara Kelly 1977-4-23 386 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62765  Lomatium utriculatum M. Dean Griswold Jr. 1979-4-14 3 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC66651  Lomatium utriculatum Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC75321  Lomatium utriculatum Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC97421  Lomatium utriculatum Tom Duebendorfer 1977-4-23 15 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  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
  UCR257975  Lotus grandiflorus Ellen Dean, Craig D. Thomsen, Gordon Harrington, R. Wilmarth, R. Wenk 2010-6-2 6045 Colusa Walker Ridge, along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 770 Comment
  RSA245245  Lotus grandiflorus var. grandiflorus J. P. Smith 1971-6-6 4718 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road Comment
  HSC31267  Lotus humistratus Carter Schleicher 1974-5-4 5 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31391  Lotus humistratus Maralyn O'Meara 1974-5-4 320 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31970  Lotus humistratus Gary S. Lester 1974-5-4 129 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC42031  Lotus humistratus Rich White 1977-4-23 31 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66043  Lotus humistratus D. Stamp, C. Macdonald, Cathy Railey, P. Powers, J. Spitler 1980-4-19 22 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66662  Lotus humistratus D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 4 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  RSA299456  Lotus humistratus Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 26 Lake Along Walker Ridge Road, 2.65 miles south of junction with access road to Indian Valley Dam. Comment
  UCR139079  Lotus humistratus D. Haskamp, E. Sonnenblick, M. Taft 1995-4-1 17 Lake Blue Oak campground on Walker Ridge Road. Riparian area of Benmore Canyon Creek approximately 200 m east of campsites 537 Comment
  JEPS94739  Lotus scoparius var. scoparius Vernon H. Oswald and Lowell Ahart 1998-7-15 9310 Lake 3.6 mi n of Highway 20 (e side of county on Walker Ridge Road 10.9 mi s of Bartlett Springs Road); Walker Ridge Road 762 Comment
  SEINET11268346  Lotus scoparius var. scoparius Vernon H. Oswald, Lowell Ahart 1998-7-15 9310 Lake East side of county on Walker Ridge Rd. 10.9 mi south of Bartlett Springs Rd., 3.6 mi north of Hwy. 20.; 0 762 Comment
  HSC37638  Lupinus albifrons John Rehling, Robert M. Specht 1976-3-26 168 Lake 8.3 mi. N on Barlett Springs Rd. from jct. with Hwy. 20 Comment
  HSC90520  Lupinus albifrons Pamela Grefsrud, Marty Reed, Eileen Rohmer 1990-4-14 47 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd. 2.5 mi. NE of intersection Walker Ridge Rd. 534 Comment
  UCD163846  Lupinus albifrons Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82547  Lupinus albifrons Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5702 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 Comment
  HSC89729  Lupinus albifrons var. albifrons William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake Lake/Colusa Co. line. 8 mi. off Brim Rd. on Walker Ridge. 915 Comment
  UCD83747  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 a Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  UCD83748  Lupinus albifrons var. collinus Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5945 b Colusa Walker Ridge. Along Walker Ridge Road at intersection with road to Eaton Springs. Roadside, on E side of road. 927 Comment
  UCR224884  Lupinus albifrons var. collinus Ellen Dean, Gordon Harrington, Kate F. Mawdsley, Jean V. Shepard 2010-5-1 5945 A Colusa Walker Ridge, along Walker Ridge Road at intersection with road to Eaton Springs, east side of road 927 Comment
  POM276309  Lupinus albifrons var. eminens Lyman Benson 1933-4-16 4324 Colusa Abbott Mine; Inner North Coast mountain range; north fork Cache Creek 762 Comment
  HSC30770  Lupinus bicolor J. P. Smith, J. O. Sawyer 1972-4-1 5137 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC33271  Lupinus bicolor Thomas W. Nelson, Jane P. Nelson 1974-4-8 1151 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC67105  Lupinus bicolor Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 6 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC82325  Lupinus bicolor Thomas W. Nelson, Jane P. Nelson 1978-4-1 3855 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  HSC90056  Lupinus bicolor Rohmer, Reed, Grefsrud 1990-4-14 31 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC91343  Lupinus bicolor Eric German, Klara Varga, Michele Cardinaux 1989-4-15 29 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 152 Comment
  RSA299452  Lupinus bicolor Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 6 Lake Coldsprings Campground, along access road to Indian Valley Dam. 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
  CHSC3940  Lupinus densiflorus var. aureus M. Lee 1967-4-29 20 Colusa On N side of Hwy 20 ca. 26 mi. west of Williams. Comment
  HSC66641  Lupinus densiflorus var. aureus Cathie Goldberg, Lynn Kunstman, Geoff Walsh, Lauren Philbrick 1980-4-19 22 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC86904  Lupinus densiflorus var. aureus Terry Hines, Ellen Purcell, N. Williams 1988-4-16 29 Lake 6.1 mi. on Walker Ridge Rd., N of Hwy. 20. Across from Blue Oak Campground 732 Comment
  HSC89298  Lupinus densiflorus var. aureus L. Blackford, S. Branch, D. Malm 1988-4-16 42 Lake 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  HSC89794  Lupinus densiflorus var. aureus A. Smith, A. Eller, B. Hoffman 1989-4-15 16 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 just W of Walker Ridge Rd. 152 Comment
  HSC95455  Lupinus densiflorus var. densiflorus A. Miles, M. Malle, B. Gibbs 1999-5-1 28 Lake Blue Oak Rec. Area; Walker Ridge Rd., 1/4 km N of campground 536 Comment
  CHSC94928  Lupinus latifolius var. columbianus K. Lang; Classmates 2005-4-2 18 Lake Walker Ridge. 1000 Comment
  UC763972  Lupinus luteolus R. F. Hoover 1938-6-11 3595 Colusa Williams-Lake Co. highway at junction Wilbur Sprs road Comment
  CDA26550  Lupinus microcarpus var. densiflorus G. F. Hrusa, R. Gross 2008-5-23 17392 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA40147  Lupinus microcarpus var. densiflorus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18579 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 426 Comment
  CHSC101519  Lupinus microcarpus var. densiflorus G. F. Hrusa; R. Gross 2008-5-23 17392 Lake West slope at crossing of Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCR138732  Lupinus microcarpus var. densiflorus Ryan Stafsnes, Chris Dunn, Darina Roediger 1997-3-29 22 Lake Blue Oak campground, 2.5 mi past intersection of access road and Walker Ridge Rd 274 Comment
  UCD81073  Lupinus microcarpus var. microcarpus Catherine Yasuda; with PLB 102 class 2009-5-3 3 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  HSC41891  Lupinus pachylobus Lloyd Simpson 1977-4-23 260 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC86905  Lupinus pachylobus Terry Hines, Ellen Purcell, N. Williams 1988-4-16 30 Lake 6.1 mi. N on Walker Ridge Rd., Blue Oak Campground, W of Rd. 732 Comment
  HSC89695  Lupinus polycarpus William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake Lake/Colusa Co. line, 8 mi. S of Brim Rd. on Walker Ridge 915 Comment
  HSC89706  Lupinus polycarpus Eric German, Klara Varga, Michele Cardinaux 1989-4-15 27 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 152 Comment
  CHSC27549  Lupinus succulentus Scott E. Patton 1978-4-9 13 Lake 5.1 mi w of Walker Ridge Rd, Hwy 20. 457 Comment
  CHSC27819  Lupinus succulentus Laurie L. Pate 1978-4-8 87 Colusa 5.1 mi w of Walker Ridge Road, Hwy 20. 457 Comment
  CDA26547  Madia exigua G. F. Hrusa, R. Gross 2008-5-23 17403 Lake North Coast Ranges; Box Cyn. Creek. upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA40170  Madia exigua G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18550 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  CHSC101525  Madia exigua G. F. Hrusa; R. Gross 2008-5-23 17403 Lake Gravelly spots on open dry flats along Box Canyon Creek and on roadside in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD81694  Madia exigua Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5706 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 743 Comment
  CDA26534  Madia gracilis G. F. Hrusa, R. Gross 2008-5-23 17393 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101520  Madia gracilis G. F. Hrusa; R. Gross 2008-5-23 17393 Lake West slope at crossing of Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  HSC41865  Madia gracilis K. Irwin 1977-4-23 291 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  UCD81905  Madia gracilis Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5486 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD81907  Madia gracilis Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5488 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 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
  HSC82431  Malacothamnus fremontii Thomas W. Nelson, Jane Nelson 1979-10-14 5067 Lake N side of State Route 20, 1 mi. W of Oasis, 2 mi. W of Walker Ridge Rd. Comment
  UCD110403  Malacothamnus fremontii Daniel Slakey; CNPS volunteers 2011-6-12 1 Lake Walker Ridge. Around small ORV trail that connects to Indian Valley Reservoir Rd. About halfway between Walker Ridge Rd. and Indian Valley Reservoir. 618 Comment
  UCD144681  Malacothamnus fremontii Daniel Slakey; CNPS volunteers 2011-6-12 1 Lake Walker Ridge. Around small ORV trail that connects to Indian Valley Reservoir Rd. About halfway between Walker Ridge Rd. and Indian Valley Reservoir. 618 Comment
  CDA9388  Malacothamnus hallii G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18594 Lake North Coast Ranges; Silver Spur Ranch. Middle Benmore Canyon 1 1/2 mi. S of spillway at Indian Valley Reservoir. 454 Comment
Read comments Dec 18 2016
  POM282851  Malacothamnus helleri Lyman Benson 1933-6-26 4488 Colusa Abbott mine. 549 Comment
  UCD81940  Malacothrix clevelandii Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5521 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD83450  Malacothrix clevelandii Craig Thomsen; G. Harrington 2009-5-12 2826 Colusa Colusa County on Walker Ridge: About 200 yards south of spur road enroute to Eaton Springs from Walker Ridge Rd. ( About 1/2 mile east of Walker Ridge Road) 822 Comment
  HSC25722  Malacothrix floccifera J. P. Smith, J. O. Sawyer 1971-6-6 4717 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC31957  Malacothrix floccifera Gary S. Lester 1974-5-4 127 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  RSA245238  Malacothrix floccifera J. P. Smith, John Sawyer 1971-6-6 4717 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road Comment
  UCD163336  Malacothrix floccifera Craig D. Thomsen 2009-5-3 2807 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCD82375  Malacothrix floccifera Craig Thomsen; G. Harrington 2009-5-12 2817 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 Comment
  UCD82542  Malacothrix floccifera Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5698 Colusa Walker Ridge. Til Jones Spring area along Walker Ridge Road. 833 Comment
  UCD81919  Marah watsonii Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5500 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 731 Comment
  HSC90051  Matricaria discoidea Rohmer, Grefsrud, Reed 1990-4-14 44 Lake Blue Oak Campground, Indian Valley Reservoir Access Road, 2.5 mi. NE of the intersection with Walker Ridge Rd 534 Comment
  HSC31700  Medicago polymorpha Thomas E. Higley 1974-5-4 60 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  UCD84538  Medicago polymorpha Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6137 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  CDA40161  Melica californica G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18585 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon immed. above Box Cyn. confluence, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  HSC41828  Melica californica Rick Cooper 1977-4-23 29 Lake 0.4 mi. N of State Route 20 on Walker Ridge Rd. 640 Comment
  HSC48523  Melica californica J. P. Smith, J. O. Sawyer 1978-4-29 9773 Lake Lake-Colusa County line, Walker Ridge Rd., 0.4 mi. from T-intersection to Indian Valley Reservoir. Comment
  HSC97397  Melica californica Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  RSA256618  Melica californica Donald Spalinger 1974-5-4 33 Lake Walker Ridge Road, approx. 0.5 mile north from H. 20. 671 Comment
  UCD81924  Melica californica Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5505 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82124  Melica californica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5653 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC247101  Melica torreyana Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  HSC48522  Melica torreyana J. P. Smith, J. O. Sawyer 1978-4-29 9773 Lake Lake-Colusa County line, Walker Ridge Rd., 0.4 mi. from T-intersection to Indian Valley Reservoir. Comment
  UCD82587  Melica torreyana Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2732 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD84546  Melica torreyana Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6144 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
  CDA26542  Melilotus indicus G. F. Hrusa, R. Gross 2008-5-23 17402 Lake North Coast Ranges; Box Cyn. Creek and on roadside in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101523  Melilotus indicus G. F. Hrusa; R. Gross 2008-5-23 17402 Lake Open dry flats along Box Canyon Creek and on roadside in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD82136  Melilotus indicus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5669 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  UCD82087  Mentzelia dispersa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5614 Lake 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. 821 Comment
  UCD82738  Mentzelia micrantha Craig Thomsen; G. Harrington 2009-5-14 2919 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 822 Comment
  CAS-BOT-BC428805  Micranthes californica Eric B. Peterson; Thomas Ward; Matt Foruria 1995-4-1 29 Lake Blue Oak Campground, about 70m up the canyon from the end of camping area, ~40m uphill from stream on N facing slope. 548 Comment
  CHSC37341  Micranthes californica B. Castro 1982-3-27 6 Lake In ravine ca. 20 yds s of Hwy 20 at jct with Walker Ridge Rd, ca. 6 mi w of jct of Hwys 20 and 16. 606 Comment
  CHSC33062  Micropus californicus var. californicus James Payne Smith Jr. 1974-5-4 7357 Lake 0.5 miles north of junction of S.R. 20 and Walker Ridge Road. 670 Comment
  HSC31591  Micropus californicus var. californicus Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  HSC67931  Micropus californicus var. californicus J. P. Smith 1974-5-4 7357 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC92588  Micropus californicus var. californicus Moulton, Sparks, Wood 1995-5-6 36 Lake Blue Oak Campground 549 Comment
  UCD134507  Micropus californicus var. californicus James Payne Smith Jr. 1974-5-4 s.n. Lake 0.5 miles north of junction of S.R. 20 and Walker Ridge Road. 670 Comment
  UCD81170  Micropus californicus var. californicus Angela McGinnis; with PLB 102 class 2009-5-3 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 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
  POM290253  Microseris Lyman Benson 1933-4-16 4325 Colusa Abbott Mine; Inner North Coast mountain range; north fork Cache Creek 762 Comment
  HSC31609  Microseris douglasii Maralyn O'Meara 1974-5-4 311 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC44413  Microseris douglasii subsp. douglasii Barbara Kelly 1977-4-23 329 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UCD81908  Microseris laciniata Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5489 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD81931  Microseris laciniata Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5512 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  CHSC101538  Microsteris gracilis G. F. Hrusa; R. Gross, L. Houser 2008-4-11 17117 Lake Open chaparral slopes with woodland on N faces immediately below Indian Valley Reservoir spillway into North Fork Cache Creek tailrace. 396 Comment
  HSC27157  Microsteris gracilis J. P. Smith, J. O. Sawyer 1972-4-1 5151 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC45812  Microsteris gracilis J. P. Smith, J. O. Sawyer 1972-4-8 5190 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC62785  Microsteris gracilis Thomas Wood 1979-4-14 100 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  UCSC010463  Microsteris gracilis Dylan M. Neubauer, Tim Forsell 2016-3-31 605 Lake (NCoRI) Walker Ridge, Walker Ridge Road, .47 air-mile nne junction with Highway 20 663 Comment
  UCR138733  Mimulus aurantiacus Ryan Stafsnes, Chris Dunn, Darina Roediger 1997-3-29 24 Lake Blue Oak campground, 2.5 mi past intersection of access road and Walker Ridge Rd 274 Comment
  UCD82625  Mimulus bolanderi Craig Thomsen; G. Harrington 2009-5-12 2895 Colusa Colusa County on Walker Ridge: from spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. About 200 yds.south off spur road, south-facing hillslope above ravine and spring area. 813 Comment
  UCD82726  Mimulus cardinalis Craig Thomsen; G. Harrington 2009-5-14 2909 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
  HSC95551  Mimulus douglasii A. Hove, A. Poteet, C. Sanville 1999-3-27 8 Lake Walker Ridge Rd. 817 Comment
  UCD82134  Mimulus floribundus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5664 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  HSC66063  Mimulus guttatus C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 35 Lake Along Walker Ridge Rd., 1.0 mi. N of junction with access road to Indian Valley Dam. 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
  UCD82512  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2870 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  UCD82521  Mimulus guttatus Craig Thomsen; G. Harrington 2009-5-12 2878 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 713 Comment
  UCR138734  Mimulus kelloggii Ryan Stafsnes, Chris Dunn, Darina Roediger 1997-3-29 25 Lake Blue Oak campground, 2.5 mi past intersection of access road and Walker Ridge Rd 274 Comment
  UCD82111  Mimulus latidens Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5639 Lake 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. 818 Comment
  CDA40169  Mimulus nasutus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18561 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 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
  UCD81729  Mimulus rattanii Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5731 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
  UCD82088  Mimulus rattanii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5615 Lake 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. 821 Comment
  HSC66056  Mimulus tilingii Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 42 Lake Along Walker Ridge Rd., 1 mi. N of jct. with access road to Indian Valley Dam Comment
  HSC27223  Minuartia douglasii J. P. Smith 1972-4-8 5188 Lake 0.2 mi. N of jct. of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31400  Minuartia douglasii Maralyn O'Meara 1974-5-4 318 Lake Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31564  Minuartia douglasii Teresa Prendusi 1974-5-4 49 Colusa Beyond Clyde Mine 1/8 mi. 854 Comment
  HSC41932  Minuartia douglasii E. Cope 1977-4-23 34 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC75317  Minuartia douglasii Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCD81191  Minuartia douglasii Robinder Aulakh; with PLB 102 class 2009-5-3 3 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82137  Minuartia douglasii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5670 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
  UCD82385  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-12 2827 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  UCD82737  Minuartia douglasii Craig Thomsen; G. Harrington 2009-5-14 2918 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  UCD84445  Monardella Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6053 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
  CHSC106248  Monardella villosa B. Castro; L. P. Janeway 2001-6-3 1261 Colusa Inner North Coast Ranges. 'Til Jones Spring' at headwaters of Freshwater Branch of E. Fork Sulphur Ck, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 Comment
  UC2042512  Monardella villosa Holly Forbes and Barbara Keller 2011-7-7 Colusa Walker Ridge Road 6.1 miles N from its intersection with Highway 30. 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
  UCD82537  Monardella villosa subsp. villosa Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5690 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  CAS-BOT-BC233765  Montia Bonnie Prange 1974-5-4 s.n. Lake Near Walker Ridge Road, 1/2 mile north of junction with Highway 20 670 Comment
  UCD84569  Nassella cernua Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6094 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD82446  Nassella lepida Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5662 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  CAS-BOT-BC242676  Nassella pulchra Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5628 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir 821 Comment
  CDA26532  Nassella pulchra G. F. Hrusa, R. Gross 2008-5-23 17396 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  UCD82101  Nassella pulchra Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5628 Lake 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. 821 Comment
  UCD84426  Navarretia intertexta Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6042 Lake Walker Ridge. Along Walker Ridge Road, 0.6 road mi N of intersection with Hwy 20. E side of the road. 662 Comment
  CHSC88556  Navarretia jepsonii L. P. Janeway 2001-6-6 7127 Colusa Inner North Coast Ranges. Deadshot Spring; about 1.9 km (air) east of Walker Ridge Road. 716 Comment
  JEPS86357  Navarretia jepsonii Jack and Betty Guggolz 1988-6-5 940 Lake about 0.5 mi from Hwy. 20 (on the Walker Ridge Road, on the e side of the road) Comment
  UC1552812  Navarretia jepsonii Frederica Bowcutt 1985-6-20 607 Colusa n of Hwy. 20; Walker Ridge Comment
  CAS-BOT-BC230053  Navarretia mellita Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5636 Lake 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 818 Comment
  UCD82108  Navarretia mellita Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5636 Lake 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. 818 Comment
  UCD84439  Navarretia mellita Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6049 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  CAS-BOT-BC230054  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
  CDA26528  Navarretia pubescens G. F. Hrusa, R. Gross 2008-5-23 17387 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 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
  UCR53767  Navarretia pubescens Aaron Liston, S. Meury 1988-5-31 750- 2 Lake 0.45 miles from jct. Hwy 20 on Walker Ridge Road 600 Comment
  SEINET3860223  Navarretia tagetina Leigh A. Johnson 2004-5-13 04 -046 Lake 0.45 miles up Walker Ridge Road (N) from jct with Hwy 20 (just west of Lake/Colusa Co. Line). At a large pullover area with a serpentine hill on east and a meadow to the north of the hill.; 0 655 Comment
  SEINET3860225  Navarretia tagetina Leigh A. Johnson 2005-1 05 -005 Lake About 0.45 miles up Walker Ridge Road (N) from jct with Hwy 20 (just west of Lake/Colusa Co. Line). At a large pullover area with a serpentine hill on E and a meadow to the N of the hill. In the general vicinity of the meadow or hill, within about a 100 yard radius. Around edge of vernal pool.; 0 2150 Comment
  UCD84425  Navarretia tagetina Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6041 Lake Walker Ridge. Along Walker Ridge Road, 0.6 road mi N of intersection with Hwy 20. E side of the road. 662 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
  UCD82086  Nemacladus capillaris Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5613 Lake 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. 821 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
  CHSC36129  Nemophila heterophylla Karen A. Small 1978-4-9 Lake At jct Hwy 20 and Walker Ridge Rd, ca. 6 mi w of jct of Hwys 20 and 16. Shady ne facing hillside along Hwy 20. 606 Comment
  HSC42249  Nemophila heterophylla Rich White 1977-4-23 25 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66048  Nemophila heterophylla B. Ferguson, S. Harris, S. Smith 1980-4-19 Lake Along Walker Ridge Rd. 3.7 mi. N of jct. with access rd. to Indian Valley Dam Comment
  HSC67101  Nemophila heterophylla D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 10 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC89704  Nemophila heterophylla Levine, Pacheco, Murphey 1989-4-15 25 Lake Blue Oak Campground, between Walker Ridge Rd. and Indian Valley Reservoir. Comment
  UC726903  Nemophila heterophylla A. A. Heller 1941-5-5 16102 Lake 4 mi w County Line (along Highway #20); w of the county line Comment
  UCD81927  Nemophila heterophylla Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5508 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCR139074  Nemophila heterophylla E. Brower, S. Marubayashi, E. Perry 1997-3-30 022 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  CHSC24670  Nemophila menziesii Kristy Dudley 1976-4-3 13 Lake Small population 20 yd from Walker Ridge Rd, s side of Hwy 20 at intersection of Hwy 20 and Walker Ridge Road. 304 Comment
  CHSC32915  Nemophila menziesii S. Harris; B. Ferguson, M. Moble, M. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC66012  Nemophila menziesii Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 3 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD120230  Nemophila menziesii Debbie Stamp; Patty P., Joanne S., Cathy R., Cathy M. 1980-4-19 15 Lake Coldsprings Campground, along access road to Indian Valley Dam. In lower part of campground. Comment
  UCR139073  Nemophila menziesii var. menziesii E. Brower, S. Marubayashi, E. Perry 1997-3-30 023 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  HSC42028  Nemophila parviflora M. A. Baker 1977-4-23 192 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66134  Nemophila pedunculata C. Macdonald, P. Powers, C. Raley, J. Spitler, D. Stamp 1980-4-19 42 Colusa On Bartlett Springs Rd. at stream crossing Comment
  HSC66645  Nemophila pedunculata Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 18 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC90945  Nemophila pedunculata Rohmer, Grefsrud, Reed 1990-4-14 34 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  CAS-BOT-BC227679  Oemleria cerasiformis Craig Thomsen 2008-6-12 2762 Colusa Walker Ridge, vicinity of Elgin Mine. Lucientes Property 655 Comment
  UCD82571  Oemleria cerasiformis Craig Thomsen 2008-6-12 2762 Colusa Walker Ridge, vicinity of Elgin Mine. Lucientes Property. 655 Comment
  CHSC71442  Orobanche fasciculata Vernon H. Oswald; Lowell Ahart 1998-7-15 9307 Lake East side of county on Walker Ridge Rd. 9.8 mi south of Bartlett Springs Rd., 4.6 mi north of Hwy. 20. On a roadcut. 792 Comment
  HSC39709  Orobanche fasciculata D. E. Anderson, J. P. Smith 1971-6-25 - 1182 Lake 5.2 mi. N of jct. of Walker Ridge Rd. and Hwy. 20 along Walker Ridge. Comment
  HSC46133  Orobanche fasciculata J. P. Smith, J. O. Sawyer 1971-6-6 4715 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  JEPS93870  Orobanche fasciculata Vernon H. Oswald and Lowell Ahart 1998-7-15 9300 Lake e side of county on Walker Ridge Road 9.8 mi s of Bartlett Springs Road (4.6 mi n of Highway 20); Walker Ridge Road 792 Comment
  UCD163335  Orobanche fasciculata Craig D. Thomsen 2009-5-3 2806 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCD163347  Orobanche fasciculata Craig D. Thomsen 2000-5-11 2342 Lake Walker Ridge. 3 miles southwest of Windtun Campground turnoff, Til Jones Spring area. Comment
  HSC31393  Orobanche uniflora Maralyn O'Meara 1974-5-4 324 Lake Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31397  Orobanche uniflora Maralyn O'Meara 1974-5-4 319 Lake Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31645  Orobanche uniflora Gary S. Lester 1974-5-4 136 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC33130  Orobanche uniflora Thomas W. Nelson, Jane Nelson 1974-4-8 1156 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC66026  Orobanche uniflora D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 26 Lake Along Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66583  Orobanche uniflora D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 11 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC90073  Orobanche uniflora Amy Austin, Tony LaBanca, Noreen McClintock 1990-4-14 33 Lake Blue Oak Campground on Indian Valley Reservoir Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC90408  Orobanche uniflora Joe Doyle, Gayle Honeycutt, Ethan Freid 1992-4-12 44 Lake Blue Oak Recreation Site, 6.5 mi. N of Hwy. 20 on Walker Ridge Rd. 488 Comment
  POM332461  Orthocarpus attenuatus Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 29 Lake Along Walker Ridge Road, 1 mile north of junction with access road to Indian Valley Dam. Comment
  RSA258897  Orthocarpus purpurascens var. purpurascens Thomas W. Nelson, Jane P. Nelson 1974-4-8 1145 Lake ca. 200 m. east of Oasis Resort 13 mi. east of Clear Lake Oaks along Hwy 20. Comment
  CHSC88577  Packera clevelandii L. P. Janeway 2001-6-6 7112 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  UC1552843  Packera clevelandii Frederica Bowcutt 1985-6-19 598 Colusa about 2 mi nw Wilbur Hot Springs (just sw of Bear Valley); Wilbur Springs Quad. 15' Comment
  UCD163342  Packera clevelandii Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  HSC31392  Packera eurycephala Gary S. Lester 1974-5-4 130 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC47465  Packera eurycephala J. P. Smith 1978-4-22 9738 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  UCD163313  Packera eurycephala Craig D. Thomsen 1997-4-13 1902 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD163327  Packera eurycephala Craig D. Thomsen 2009-5-3 2792 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., 0.25 miles north of Hwy 20. Comment
  UCD163853  Packera eurycephala Craig D. Thomsen 2000-5-30 2274 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD159330  Packera greenei D. S. Park 2010-6-5 114 Colusa Walker ridge, Cold Spring Mt. roadside, grassland. 760 Comment
  UCD82522  Packera greenei Craig Thomsen; G. Harrington 2009-5-12 2879 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UC1552717  Pectocarya penicillata Frederica Bowcutt 1985-4-10 482 Lake ca 1 air mi nw Gibson Hill (ca 1/8 mi s of Hwy 20) Comment
  CDA40182  Pectocarya pusilla G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18553 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  CHSC115374  Pectocarya pusilla Lowell Ahart 2015-4-10 20025 Lake Normal size plants, on damp bare soil, on the east side of the barrier rocks, on the east side of the drainage. 696 Comment
  HSC27152  Pedicularis densiflora J. P. Smith, J. O. Sawyer 1972-4-1 5162 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41938  Pedicularis densiflora Richard G. Runyon 1977-4-23 24 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC66030  Pedicularis densiflora M. Moble, M. Smith, B. Ferguson, S. Harris 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC69919  Pedicularis densiflora Thomas W. Nelson, Jane Nelson 1978-4-2 3868 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  UCD83683  Pedicularis densiflora John Rosenthal; with PLB 102 class 2010-5-2 4 Colusa Walker Ridge. East slope of Walker Ridge. Eaton Springs area. 716 Comment
  UCD82107  Pediomelum californicum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5635 Lake 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. 818 Comment
  UCD84548  Pediomelum californicum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6146 Colusa Walker Ridge. Along Walker Ridge Road, N of turnoff to Indian Valley Reservoir but S of Til Jones Spring. Many old undeveloped roads here. 817 Comment
  CHSC32931  Pellaea andromedifolia D. Boyd; M. Eichelberger, T. Messick, T. Ranker 1980-4-19 15 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC66585  Pellaea andromedifolia D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 15 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  HSC66588  Pellaea mucronata D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 19 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  UCD83617  Pellaea mucronata var. mucronata Craig Thomsen; G. Harrington 2009-5-12 2833 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 100 yds south of road (ravine with spring below). 822 Comment
  CAS-BOT-BC240290  Penstemon heterophyllus var. purdyi Ellen Dean; G. Harrington; C. Thomsen; Chiao-Yi Cheng; R. Wilmarth 2009-5-20 5674 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road 853 Comment
  UCD82488  Penstemon heterophyllus var. purdyi Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5674 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 853 Comment
  HSC66049  Pentagramma triangularis S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 3.7 mi. N of jct. with access rd. to Indian Valley Dam Comment
  HSC66133  Pentagramma triangularis Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 37 Colusa Bartlett Springs Rd. at stream crossing. Comment
  HSC66643  Pentagramma triangularis Cathy Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 20 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  UCD82501  Perideridia kelloggii Craig Thomsen; G. Harrington 2009-5-12 2860 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 710 Comment
  CDA40135  Petrorhagia dubia G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18542 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 128 Comment
  HSC66586  Phacelia cicutaria D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 16 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  UCR138750  Phacelia distans M. Brooks, Julie Evens, H. Johnson 1997-3-30 12 Lake Blue Oak Campground 274 Comment
  HSC27421  Phacelia egena J. P. Smith, J. O. Sawyer 1972-4-1 5120 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC30737  Phacelia egena Teresa Prendusi 1974-5-4 36 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31330  Phacelia egena Donald Spalinger 1974-5-4 36 Lake Walker Ridge Rd., 0.5 mi. N from Hwy. 20 671 Comment
  HSC41949  Phacelia egena Richard G. Runyon 1977-4-23 22 Lake 0.4 mi. N of SR 20 on Walker Ridge Rd. 640 Comment
  HSC42022  Phacelia egena M. A. Baker 1977-4-23 203 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44367  Phacelia heterophylla J. Walker 1977-4-23 25 Lake .4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  CDA26539  Phacelia imbricata G. F. Hrusa, R. Gross 2008-5-23 17390 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101550  Phacelia imbricata G. F. Hrusa; R. Gross 2008-5-23 17390 Lake W slope at crossing of Box Canyon Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  HSC75313  Phacelia imbricata Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCD84562  Phacelia imbricata Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6087 Lake Walker Ridge. Along Walker Ridge Road. At a lookout that looks out over Indian Valley Reservoir that is located 8.3 road miles N of the intersection of Hwy 20. 1054 Comment
  UC901839  Phacelia imbricata subsp. imbricata L. Constance, R. Bacigalupi, C. R. Bell, and A. H. Holmgren 1950-4-26 3322 Colusa ridge between Bear Valley and Indian Valley (near Colusa-Lake Co. line) 609 Comment
  UCR138751  Phacelia imbricata var. imbricata M. Brooks, Julie Evens, H. Johnson 1997-3-30 10 Lake Blue Oak Campground 274 Comment
  CDA40143  Phacelia tanacetifolia G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18577 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CDA40144  Phacelia tanacetifolia G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18575 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD82733  Phacelia tanacetifolia Craig Thomsen; G. Harrington 2009-5-14 2914 Colusa Colusa County on Walker Ridge: south of spur road about 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 762 Comment
  CDA26530  Phalaris aquatica G. F. Hrusa, R. Gross 2008-5-23 17394 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CDA40158  Phalaris aquatica G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18588 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 438 Comment
  CHSC101547  Phalaris aquatica G. F. Hrusa; R. Gross 2008-5-23 17394 Lake Flats at crossing of Box Canyon Creek in upper Benmore Canyon immediately E and S of Indiana Valley Reservoir spillway. 457 Comment
  UCD82490  Phalaris aquatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5676 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  CDA22932  Phlox gracilis G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17117 Lake North Coast Ranges; Immed. below Indian Valley Res. spillway into N. Fk. Cache Creek tailrace. 396 Comment
  HSC62794  Phoradendron serotinum subsp. tomentosum Rick Lundquist 1979-4-14 10 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC87061  Phoradendron serotinum subsp. tomentosum Anthony J. Desch, Bryon Cariss 1988-4-16 27 Lake 6.1 mi. from Hwy. 20 on Walker Ridge Rd. in Blue Oak Campground 579 Comment
  RSA589941  Phoradendron villosum Michael A. Vincent, Robert M. Rhode 1996-3-30 7311 Lake Hillside just N of jct Hwy 20 and Walker ridge Road Comment
  UCD81868  Phragmites australis Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5750 a Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  HSC39708  Pickeringia montana D. E. Anderson, J. P. Smith 1971-6-25 - 1181 Lake 5.2 mi. N of jct. of Walker Ridge Rd. and Hwy. 20 along Walker Ridge. Comment
  UCD108169  Pickeringia montana Vernon H. Oswald; Lowell Ahart 1998-7-15 9300 Lake East side of county on Walker Ridge Rd. 4.7 mi south of Barlett Springs Rd., 9.6 mi north of Hwy. 20. 883 Comment
  UCD81734  Pickeringia montana Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5736 Colusa Walker Ridge. Along Walker Ridge Road, just S of turn off to Indian Valley Reservoir. 840 Comment
  CHSC71424  Pickeringia montana var. montana Vernon H. Oswald; Lowell Ahart 1998-7-15 9300 Lake East side of county on Walker Ridge Rd. 4.7 mi south of Bartlett Springs Rd., 9.6 mi north of Hwy. 20. Along this section of road. 883 Comment
  JEPS93809  Pickeringia montana var. montana Vernon H. Oswald and Lowell Ahart 1998-7-15 9300 Lake e side of county on Walker Ridge Road 4.7 mi s of Bartlett Springs Road (9.6 mi n of Highway 20); Walker Ridge Road 883 Comment
  HSC41926  Pinus attenuata Ed Cope 1977-4-23 47 Lake Walker Ridge Rd. Comment
  UCD83751  Pinus attenuata Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5948 Colusa Walker Ridge. Along Walker Ridge Road. 10 road miles N of intersection with Hwy 20. Just N of radio tower at Cold Spring Mountain on border with Lake County. 971 Comment
  HSC31704  Pinus sabiniana Thomas E. Higley 1974-5-4 52 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31956  Pinus sabiniana Gary S. Lester 1974-5-4 121 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC41924  Pinus sabiniana Ed Cope 1977-4-23 44 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC46099  Pinus sabiniana J. P. Smith 1972-4-1 5168 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC66596  Pinus sabiniana Debbie Stamp, Cathy Railey, Patty Powers, Joanne Spitler, Cathy Macdonald 1980-4-19 13 Lake Coldsprings Campground along access road to Indian Valley Dam Comment
  NY658631  Pinus sabiniana J. Silba 2002-10-25 B- 276 Lake Barkerville, ca. 0.25 mile North of Route 20, along Walker Ridge Road. Border of Colusa County 609.6 Comment
  UCD83680  Pinus sabiniana John Rosenthal; with PLB 102 class 2010-5-2 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.5 road miles north of the intersection with Hwy 20, west side of the road where there is a turnout and a saddle between two ridges. 653 Comment
  JEPS121703  Piperia leptopetala J. Greenhouse 1993-6-6 Lake Walker Ridge Comment
  CAS-BOT-BC242677  Piptatherum miliaceum Ellen Dean; C. Thomsen; G. Harrington; Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir 683 Comment
  CDA40162  Piptatherum miliaceum G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18586 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 438 Comment
  CHSC71516  Piptatherum miliaceum Vernon H. Oswald; Lowell Ahart 1998-7-15 9309 Lake East side of county on Walker Ridge Rd. 9.8 mi south of Bartlett Springs Rd., 4.6 mi north of Hwy. 20. On slope below the road. 792 Comment
  JEPS93869  Piptatherum miliaceum Vernon H. Oswald and Lowell Ahart 1998-7-15 9309 Lake e side of county on Walker Ridge Road 9.8 mi s of Bartlett Springs Road (4.6 mi n of Highway 20); Walker Ridge Road 792 Comment
  UCD84557  Piptatherum miliaceum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6082 Colusa Walker Ridge. Along Walker Ridge Road on southern part of the ridge, south of turnoff to Indian Valley Reservoir. 683 Comment
  UCSB63778  Piptatherum miliaceum Oswald, Vernon; Ahart, Lowell 1998-7-15 Lake East side of county on Walker Ridge Rd. 9.8 mi south of Bartlett Springs Rd., 4.6 mi north of Hwy. 20: T14N R6W Sect. 14 792 Comment
  UCD82474  Plagiobothrys bracteatus Craig Thomsen; G. Harrington 2009-5-12 2852 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  HSC95798  Plagiobothrys fulvus A. Skelly, G. McCabe, B. Bletcher 1996-3-30 24 Lake 5.3 mi. W of Walker Ridge Rd. on Indian Res. Rd.; 57 mi. E of Hwy. 101 on Hwy. 20. Beside Clear Creek 549 Comment
  CHSC33093  Plagiobothrys nothofulvus Teri Bartowski; Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 11 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC27443  Plagiobothrys nothofulvus J. P. Smith, J. O. Sawyer 1972-4-1 5134 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC42085  Plagiobothrys nothofulvus E. Cope 1977-4-23 38 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42257  Plagiobothrys nothofulvus N. G. Sugihara 1977-4-23 30 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62782  Plagiobothrys nothofulvus Thomas Wood 1979-4-14 105 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  HSC66658  Plagiobothrys nothofulvus Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 2 Lake Coldsprings Campground, along access road to Indian Valley Dam. 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
  UCD81903  Plagiobothrys stipitatus var. micranthus Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5484 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD82473  Plagiobothrys stipitatus var. stipitatus Craig Thomsen; G. Harrington 2009-5-12 2850 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 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
  HSC31390  Plagiobothrys tenellus Maralyn O'Meara, Gary S. Lester 1974-5-4 325 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31573  Plagiobothrys tenellus Teresa Prendusi 1974-5-4 28 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31843  Plagiobothrys tenellus Maralyn O'Meara, Gary S. Lester 1974-5-4 347 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC66664  Plagiobothrys tenellus S. Harris, B. Ferguson, S. Smith 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC75329  Plantago elongata Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  CHSC88961  Plantago erecta Christine Hantelman 2000-4-1 48 Lake Walker Ridge Road. 579 Comment
  HSC28218  Plantago erecta J. P. Smith, J. O. Sawyer 1972-4-1 5114 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31855  Plantago erecta Maralyn O'Meara 1974-5-4 322 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC42038  Plantago erecta Rich White 1977-4-23 19 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44252  Plantago erecta Barbara Kelly 1977-4-23 330 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC49027  Plantago erecta Patricia Shesgreen 1978-4-22 15 Lake .6 mi. up Walker Ridge Rd. off Hwy. 20 Comment
  HSC62803  Plantago erecta Marla J. Carollo Apr 1979 21 Lake .4 mi. N of State Rte. 20 on Walker Ridge Rd. 640 Comment
  HSC66072  Plantago erecta Teri Bartowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 17 Lake Walker Ridge Rd., 2.65 mi. S of junction with access road to Indian Valley Dam Comment
  HSC66597  Plantago erecta Joanne Spitler, Debbie Stamp, Patty Powers, Cathy Railey, Cathy Macdonald 1980-4-19 11 Lake Coldsprings Campground, along access road to Indian Valley Dam, across road from campground Comment
  RSA245199  Plantago erecta J. P. Smith, J. O. Sawyer 1972-4-1 5114 Lake 0.2 miles north of junction of State Route 20 and Walker Ridge Road. Comment
  RSA273402  Plantago erecta E. Cope 1977-4-23 27 Lake 0.4 miles N of State Route 20 on the Walker Ridge rd. 640 Comment
  RSA402004B  Plantago erecta Carolyn Sanford 1977-4-23 338 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  RSA402005B  Plantago erecta K. Irwin 1977-4-23 283 Lake 0.4 mi N of state route 20 on the Walker Ridge Rd. 640 Comment
  UCD81193  Plantago erecta Robinder Aulakh; with PLB 102 class 2009-5-3 5 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82465  Plantago erecta Craig Thomsen; G. Harrington 2009-5-12 2842 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC32934  Platystemon californicus Cathie Goldberg; Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 Lake Coldsprings campground, along access road to Indian Valley Dam. Comment
  CHSC57193  Platystemon californicus Michael Foley; Anne Foley 1983-4-9 1 Lake Jct. Hwy 20 and Walker Ridge Rd, ca. 6 mi w of jct. of Hwys 20 and 16. 606 Comment
  HSC27175  Platystemon californicus J. P. Smith, J. O. Sawyer 1972-4-1 5118 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31578  Platystemon californicus Teresa Prendusi 1974-5-4 32 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC66692  Platystemon californicus Debbie Stamp, Patty Powers, Cathy Railey, Cathy Macdonald, Joanne Spilter 1980-4-19 2 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC90038  Platystemon californicus Andrew Enberg, Brad Penkala, Dan Scofield 1990-4-14 45 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  HSC90084  Platystemon californicus Pamela Grefsrud, Marty Reed, Eileen Rohmer 1990-4-14 51 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  UCR139072  Plectritis brachystemon E. Brower, S. Marubayashi, E. Perry 1997-3-30 024 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  HSC27446  Plectritis ciliosa J. P. Smith, J. O. Sawyer 1972-4-1 5132 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31399  Plectritis ciliosa Maralyn O'Meara, Gary S. Lester 1974-5-4 338 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC31699  Plectritis ciliosa Thomas E. Higley 1974-5-4 61 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC42191  Plectritis ciliosa M. A. Baker 1977-4-23 188 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42193  Plectritis ciliosa M. A. Baker 1977-4-23 185 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC67107  Plectritis ciliosa Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 7 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD82392  Plectritis ciliosa Craig Thomsen; G. Harrington 2009-5-12 2835 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
  CDA40175  Plectritis macrocera G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18548 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  CHSC115378  Plectritis macrocera Lowell Ahart 2015-4-10 20023 Lake Normal size plants, on damp dark soil. 696 Comment
  HSC41890  Plectritis macrocera Lloyd Simpson 1977-4-23 276 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62806  Plectritis macrocera J. M. DiTomaso 1979-4-14 868 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66657  Plectritis macrocera Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 4 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  CDA40146  Poa bulbosa G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18599 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon 1 1/2 mi. S of spillway at Indian Valley Reservoir. 528 Comment
  HSC66648  Poa bulbosa Cathie Goldberg, Lauren Philbrick, Geoff Walsh, Lynn Kunstman 1980-4-19 12 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC86896  Poa bulbosa Anthony J. Desch, Bryon Cariss 1988-4-16 24 Lake 6.1 mi. from Hwy. 20 on Walker Ridge Rd. in Blue Oak Campground. 579 Comment
  HSC96802  Poa bulbosa J. Carey, A. Hong, J. Leffingwell 1995-4-2 35 Lake Blue Oak Recreation Site Campground. 537 Comment
  RSA299478  Poa bulbosa S. Harris, B. Ferguson, M. Moble, Marjorie Smith 1980-4-19 s.n. Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD81909  Poa bulbosa Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5490 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD82444  Poa howellii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5661 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UCD82624  Poa pratensis Craig Thomsen; G. Harrington 2009-5-12 2894 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCD82719  Poa pratensis Craig Thomsen; G. Harrington 2009-5-14 2902 Colusa Colusa County on Walker Ridge: Probably from Eaton Springs about one mile east of Walker Ridge Road. Comment
  UCD81912  Poa secunda Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5493 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  UCD82731  Poa secunda Craig Thomsen; G. Harrington 2009-5-14 2913 Colusa Colusa County on Walker Ridge: about south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  HSC10739  Poa secunda subsp. secunda T. F. Newman 1965-4-6 652 Lake 15 mi. E of Clear Lake Oaks. Comment
  HSC27444  Poa secunda subsp. secunda J. P. Smith, J. O. Sawyer 1972-4-1 5143 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31261  Poa secunda subsp. secunda Carter Schleicher 1974-5-4 8 Lake 0.5 mi. N of Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC31707  Poa secunda subsp. secunda Thomas E. Higley 1974-5-4 49 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC41903  Poa secunda subsp. secunda M. A. Baker 1977-4-23 198 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UC1552832  Pogogyne serpylloides Frederica Bowcutt 1985-4-11 484 Lake Walker Ridge aprrox. 10 miles E of Clear Lake and 45 miles NE of Santa Rosa W of Hwy 20 1/4 mile Comment
  UCD83719  Populus fremontii subsp. fremontii Joseph Schlottman; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs. Adjacent to main creek. 710 Comment
  SEINET3892951  Potamogeton pectinatus James L. Reveal, Caroline G. Reveal 1972-7-18 2787 Mono Along California Highway 120, 3.4 miles west of U.S. Highway 6 at Benton, in a small lake south of the road 1.6 miles northeast of Benton Hot Springs.; 0 Comment
  UC1261170  Potamogeton pectinatus James L. Reveal, Caroline G. Reveal 1972-7-18 2787 Mono 3.4 mi w of U.S. Highway 6 at Benton (along Cal Hwy 120, 1.6 mi ne of Benton Hot Springs) 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
  CDA9371  Potentilla glandulosa G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18597 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon Rd. in upper Benmore Canyon 1 1/2 mi. S of spillway at Indian Valley Reservoir. 528 Comment
  UCD163849  Prunus subcordata Craig D. Thomsen 2000-6-7 2366 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD20041  Prunus virginiana var. demissa C. H. Lamoureux; J. M. Tucker and R. Gankin 1957-5-4 1254 Lake Hwy 20, 8 miles west of junction with Hwy 16 and 4 miles west of the Lake-Colusa County line. 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
  CHSC71416  Pseudognaphalium californicum Vernon H. Oswald; Lowell Ahart 1998-7-15 9311 Lake East side of county on Walker Ridge Rd. 11.3 mi south of Bartlett Springs Rd., 3.2 mi north of Hwy. 20. 731 Comment
  JEPS93800  Pseudognaphalium californicum Vernon H. Oswald and Lowell Ahart 1998-7-15 9311 Lake e side of county on Walker Ridge Road 11.3 mi s of Bartlett Springs Road (3.2 mi n of Highway 20) 731 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
  UCD84571  Pseudognaphalium californicum Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6096 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Goad, between Cold spring and Buck Flat. 971 Comment
  CDA40187  Psilocarphus tenellus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18546 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  UCD82083  Psilocarphus tenellus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5610 Lake 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. 821 Comment
  UCD81934  Pterostegia drymarioides Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5515 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 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
  HSC90049  Quercus berberidifolia Pamela Grefsrud, Marty Reed, Eileen Rohmer 1990-4-14 56 Lake Blue Oak Campground, Indian Valley Reservoir Access Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  UCD84511  Quercus berberidifolia Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6062 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD82546  Quercus chrysolepis Ellen Dean; G. Harrington, C. Thomsen,R. Wilmarth,Chiao-Yi Cheng 2009-5-20 5701 Colusa Walker Ridge. Along Walker Ridge just S of turn-off to picnic area near Cold Spring. 1007 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-BC86895  Quercus douglasii Pat Daly; Rudy Galindo 1988-4-16 41 Lake 6.1 miles on Wlaker Ridge Road from Hwy. 20 to Blue Oak Campground 731 Comment
  HSC27172  Quercus douglasii J. P. Smith, J. O. Sawyer 1972-4-1 5109 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31607  Quercus douglasii Gary S. Lester 1974-5-4 138 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC89798  Quercus douglasii L. Blackford, S. Branch, D. Malm 1988-4-16 65 Lake 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  CAS-BOT-BC86195  Quercus dumosa L. Blackford; S. Branch; D. Malm 1988-4-16 65 Lake 6.1 miles on Walker Ridge Rd. off highway 20 at Blue Oak Campground 731 Comment
  UCD45869  Quercus dumosa Hans G. Jung 1976-4-17 6 Colusa California, Colusa County: 2 miles west of Bear Valley, on north end of Walker Ridge, T15N, R6W, sec. 11. Elevation 1800 feet. 548 Comment
Read comments Apr 18 2009
  CAS-BOT-BC79617  Quercus durata N. Wynne; M. Peckham; J. Bamesberger 1994-4-23 31 Lake Benmore Cnyn Quad., on access road to Indian Valley Res. approx one mi from Blue Oak Campground, approx 1.5 mi from Comment
  JEPS37341  Quercus durata W. L. Jepson 1920-5-24 9025 Lake e of Indian Valley Comment
  UCD163843  Quercus durata Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD45981  Quercus durata D. Sanchez-Mata 1996-7-3 s.n. Colusa Williams. Walker Ridge. Wilburg Springs-Wintun Camp. Serpentine chaparral. 850 Comment
  UCD84510  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6061 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCD84514  Quercus durata Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6065 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 Comment
  UCR52364  Quercus durata L. Blackford, S. Branch, D. Malm 1988-4-16 62 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  HSC27151  Quercus durata var. durata J. P. Smith, J. O. Sawyer 1972-4-1 5163 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC27288  Quercus durata var. durata J. P. Smith, J. O. Sawyer 1972-4-1 5178 Lake Wuntun Campground Comment
  HSC31420  Quercus durata var. durata Gary S. Lester 1974-5-4 132 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC31697  Quercus durata var. durata Thomas E. Higley 1974-5-4 64 Colusa 3/4 mi. N of T junction of Indian Valley. 854 Comment
  HSC31701  Quercus durata var. durata Thomas E. Higley 1974-5-4 55 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC68210  Quercus durata var. durata J. P. Smith, J. O. Sawyer 1972-4-1 5164 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC68249  Quercus durata var. durata J. P. Smith 1974-5-4 7354 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  HSC98264  Quercus durata var. durata Pamela Grefsrud, Marty Reed, Eileen Rohmer 1990-4-15 52 Lake Indian Valley Reservoir Access Rd. 1.5 mi NE of intersection with Walker Ridge Rd. 689 Comment
  UCD45902  Quercus durata var. durata Frank T. Callahan II 1986-11-16 s.n. Lake California, Lake County: off Highway 20, several miles west of junction with Highway 16. Comment
  UCD81088  Quercus durata var. durata Michael Raines; with PLB 102 class 2009-5-3 3 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  HSC86782  Quercus lobata Terry Hines, Ellen Purcell, N. Williams 1988-4-16 36 Lake 6.1 mi. on Walker Ridge Rd., Blue Oak Campground 732 Comment
  CAS-BOT-BC104843  Quercus wislizeni D. Haskamp; E. Sonnenblick; M. Taft 1995-5-6 47 Lake Blue Oak campground on Walker Ridge Rd. Riparian area of Benmore Canyon Creek approx. 200 m W of campsites Comment
  CAS-BOT-BC234979  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen; G. Harrington; R. Wilmarth; R. Wenk 2010-6-2 6064 Colusa On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat 971 Comment
  HSC27287  Quercus wislizeni var. frutescens J. P. Smith, J. O. Sawyer 1972-4-1 5177 Lake Wuntun Campground Comment
  HSC66646  Quercus wislizeni var. frutescens Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 16 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  SBBG83452  Quercus wislizeni var. frutescens C. C. Shock 1980-5-3 77 Lake Walker Ridge, 9.4 mi N of St Hwy 20 609 Comment
  UCD84512  Quercus wislizeni var. frutescens Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6063 Colusa Colusa County. On Lake County border. Walker Ridge. Along Walker Ridge Road, between Cold Spring and Buck Flat. 971 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
  UCD81939  Rafinesquia californica Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5520 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82383  Rafinesquia californica Craig Thomsen; G. Harrington 2009-5-12 2824 Colusa Colusa County. Walker Ridge. South of spur road en route to Eaton Springs, about 1/2 mile east of Walker Ridge Rd. About 200 yds south of road (ravine with spring below). 822 Comment
  UCR138657  Rafinesquia californica A. Burgard, J. Goldsmith, J. Kalt 1996-5-3 64 Lake Blue Oak Campground. 5.3 mi west of Walker Ridge Road on Indian Reservoir Road. 57 mi east of Hwy 101 on Hwy 20 549 Comment
  CDA40168  Ranunculus canus var. canus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18555 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  HSC27176  Ranunculus canus var. canus J. P. Smith, J. O. Sawyer 1972-4-1 5116 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  CDA40150  Ranunculus hebecarpus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18545 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 137 Comment
  HSC27450  Ranunculus hebecarpus J. P. Smith, J. O. Sawyer 1972-4-1 5136 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC66592  Ranunculus hebecarpus S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Coldsprings Campground, along access road to Indian Valley Dam Comment
  HSC40841  Ranunculus occidentalis Rick Cooper 1977-4-23 28 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC40842  Ranunculus occidentalis M. A. Baker 1977-4-23 195 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC40845  Ranunculus occidentalis Tom Duebendorfer 1977-4-23 22 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44297  Ranunculus occidentalis Barbara Kelly 1977-4-23 340 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44299  Ranunculus occidentalis Carolyn Sanford 1977-4-23 343 Lake 0.4 mi. N of State Route 20 on the Walker Ridge Road. 640 Comment
  HSC82330  Ranunculus occidentalis Thomas W. Nelson, Jane P. Nelson 1978-4-1 3863 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  UCD81926  Ranunculus occidentalis Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5507 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82500  Ranunculus occidentalis Craig Thomsen; G. Harrington 2009-5-12 2859 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  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
  UCD96945  Ranunculus occidentalis Kim E. Steiner 1979-4-1 289 Lake Walker Ridge Rd., 0.5 mi. N of State Hwy 20. 670 Comment
  HSC31603  Ranunculus occidentalis var. occidentalis Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  HSC31703  Ranunculus occidentalis var. occidentalis Thomas E. Higley 1974-5-4 54 Lake 1/2 mi. from Hwy. 20 on Walker Ridge Rd. 671 Comment
  HSC40636  Ranunculus occidentalis var. occidentalis J. P. Smith, J. O. Sawyer 1972-4-1 5116 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC40843  Ranunculus occidentalis var. occidentalis Lloyd Simpson 1977-4-23 268 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62793  Ranunculus occidentalis var. occidentalis Rick Lundquist 1979-4-14 13 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  JEPS2828 Image available Rhamnus californica var. crassifolia W. L. Jepson 1920-5-23 8974 Colusa ridge w Bear Valley; ; W of Bear Valley, Colusa Co. Comment
  UCD84540  Rhamnus ilicifolia Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6139 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  UCD15002  Rhododendron occidentale Marti Franco 1977-4-30 23 Lake California, Lake Co.; along Walker Ridge Road; Comment
  CDA40178  Rhus aromatica G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18556 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 441 Comment
  HSC27284  Rhus aromatica J. P. Smith, J. O. Sawyer 1972-4-1 5174 Lake Wuntun Campground Comment
  UCD82135  Rhus aromatica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5667 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 869 Comment
  HSC85827  Ribes californicum David Munger, Tallchief Comet, Jeff Dunk 1987-4-11 50 Lake Blue Oak Campground out Walker Ridge Rd. off Hwy. 20 E Comment
  HSC85947  Ribes californicum Michalski, Hopson, Raum 1987-4-21 47 Lake Blue Oak Campground, 8 mi. N of Hwy. 20 on Walker Ridge Rd., S and E of Indian Valley Reservoir Comment
  HSC89690  Ribes californicum William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake 7.7 mi. N of Hwy. 20, just W of Walker Ridge Rd., Blue Oak Campground 152 Comment
  HSC101455  Ribes californicum var. californicum Heather Nichols, Bryan Wassom, Jeff Ennor 1999-3-27 3 Lake Blue Oak Campground; 8 miles off Hwy. 20 on Walker Ridge Road 537 Comment
  HSC95560  Ribes californicum var. californicum A. Hove, A. Poteet, C. Sanville 1999-3-27 10 Lake Walker Ridge Rd., 1/4mi W of Blue Oak Recreation Area 537 Comment
  HSC97661  Ribes californicum var. californicum A. Miles, B. Gibbs, M. Malle 1999-3-27 6 Lake 8 mi. off Hwy. 20, 200m W on Walker Ridge Rd. from campsite, Blue Oak Recreation Area 537 Comment
  UCR138746  Ribes californicum var. californicum A. Skelly, G. McCabe, B. Bletcher 1996-3-30 05 Lake Benmore Canyon, 5.3 mi west of Walker Ridge Rd. on Indian Reservation Rd., 57 mi east of Hwy 101 on Hwy 20. Along roadside near campground entrance 549 Comment
  CAS-BOT-BC168901  Ribes malvaceum Eric Peterson; Matt Foruria; Tom Ward 1995-4-2 59 Colusa 4.3 north on Walker Ridge Road from jct with Hwy 20 822 Comment
  CDA11010  Ribes malvaceum G. F. Hrusa 1993-3-6 10521 Lake North Coast Biodiversity Arena; Approx. 0.5 m E of Indian Valley Res. on slopes above Indian Creek. 539 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
  HSC85825  Ribes malvaceum David Munger, Tallchief Comet, Jeff Dunk 1987-4-11 53 Lake Blue Oak Campground out Walker Ridge Rd. off Hwy. 20 E Comment
  HSC25614  Rigiopappus leptocladus J. P. Smith, J. O. Sawyer 1971-6-6 4731 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC31872  Rigiopappus leptocladus Gary S. Lester 1974-5-4 124 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  HSC41892  Rigiopappus leptocladus Lloyd Simpson 1977-4-23 275 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42189  Rigiopappus leptocladus Tom Duebendorfer 1977-4-23 20 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44293  Rigiopappus leptocladus Barbara Kelly 1977-4-23 336 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UCD163332  Rigiopappus leptocladus Craig D. Thomsen 2009-5-3 2801 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD81099  Rigiopappus leptocladus Ryan Abe; with PLB 102 class 2009-5-3 54 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UC666171 Image available Rubus ursinus H. P. Olmo and S. W. Brown 1941-6-5 41053 Lake bog along state hgwy 20; Upper Clear Lake Region, Cold Spring; Cold Spring, Clear Lake Region, Lake Co. Comment
  UC666173  Rubus ursinus H. P. Olmo and S. W. Brown 1941-6-5 41053 Lake Cold Spring, State Highway 20 Upper Clear Lake Region; Cold Spring, upper Clear Lake region, Lake Co. Comment
  UCD82155  Rumex conglomeratus Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5681 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCD163344  Rumex salicifolius Craig D. Thomsen 2007-7-31 s.n. Colusa Walker Ridge. East of Eaton Springs en route to Rathburn Mine. Comment
  UCD81731  Rumex salicifolius Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5733 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
  UCD163852  Salix breweri Craig D. Thomsen 2000-6-7 2368 a Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD81722  Salix breweri Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5726 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  UCD163351  Salix exigua Craig D. Thomsen 2000-5-12 2359 Colusa Walker Ridge. Along road to Elgin Mine. Comment
  CDA40139  Salix laevigata G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18578 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 426 Comment
  UCD163851  Salix laevigata Craig D. Thomsen 2000-6-7 2368 b Colusa Bear Valley. About 7 miles north of Hwy 20. 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
  UCD163850  Salix lasiolepis Craig D. Thomsen 2000-6-7 2367 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  HSC25719  Salvia columbariae J. P. Smith, J. O. Sawyer 1971-6-6 4719 Lake 0.75 mi. N of Clyde Mine, Walker Ridge Rd. Comment
  HSC42009  Salvia columbariae M. A. Baker 1977-4-23 189 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66038  Salvia columbariae Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 29 Lake Along Walker Ridge Rd., 2.65 mi. S of its junction with access road to Indian Valley Dam. Comment
  HSC87083  Salvia columbariae L. Blackford, S. Branch, D. Malm 1988-4-16 48 Colusa 6.1 mi. on Walker Ridge Road off Hwy 20 at Blue Oak campground 732 Comment
  RSA245248  Salvia columbariae J. P. Smith, J. O. Sawyer 1971-6-6 4719 Lake 0.75 mi. north of Clyde Mine; Walker Ridge Road. Comment
  RSA401439  Salvia columbariae M. S. Baker 1977-4-23 189 Lake 0.4 miles north of State Route 20 along Walker Ridge Road 640 Comment
  UCD163337  Salvia columbariae Craig D. Thomsen 2009-5-3 2808 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 3 plus miles north of Hwy 20. 841 Comment
  UCD81937  Salvia columbariae Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5518 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD83684  Sambucus nigra subsp. caerulea John Rosenthal; with PLB 102 class 2010-5-2 5 Colusa East slope of Walker Ridge. Eaton Springs area. Growing one foot off of road leading into Eaton Springs Meadow. North side of the road. 716 Comment
  CDA24956  Sanicula bipinnata G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17121 Lake North Coast Ranges; Walker Ridge Rd. at parking area about 1/4 mile N of Hwy 20. N slope, 601 Comment
  CHSC101533  Sanicula bipinnata G. F. Hrusa; R. Gross, L. Houser 2008-4-11 17121 Lake Walker Ridge Road at parking area about 1/4 mile N of Hwy 20. 601 Comment
  HSC27435  Sanicula bipinnata J. P. Smith, J. O. Sawyer 1972-4-1 5149 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC44265  Sanicula bipinnata Barbara Kelly 1977-4-23 338 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44435  Sanicula bipinnata D. L. Goforth 1977-4-23 18 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC47462  Sanicula bipinnata J. P. Smith 1978-4-22 9741 Lake Lake/Colusa County line, Walker Ridge Rd., 0.6 mi. from its junction with Hwy. 20 640 Comment
  HSC62804  Sanicula bipinnata J. M. DiTomaso 1979-4-14 872 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC82315  Sanicula bipinnata Thomas W. Nelson, Jane P. Nelson 1978-4-1 3865 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  HSC82321  Sanicula bipinnata Thomas W. Nelson, Jane P. Nelson 1978-4-1 3851 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  RSA471430  Sanicula bipinnata Dwain L. Goforth 1977-4-23 18 Lake 0.4 mile north of State Route 20 on Walker Ridge Road. 640 Comment
  UCD81932  Sanicula bipinnata Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5513 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  CAS-BOT-BC230039  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa On Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  CHSC33050  Sanicula bipinnatifida Joanne Spitler; Patty Powers, Debbie Stamp, Cathy Railey, Cathy Ma 1980-4-19 6 Lake Coldsprings Campground, along access road to Indian Valley Dam. On the lower slopes of the campground. Comment
  HSC27445  Sanicula bipinnatifida J. P. Smith, J. O. Sawyer 1972-4-1 5150 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC31528  Sanicula bipinnatifida Maralyn O'Meara, Gary S. Lester 1974-5-4 309 Lake Along Walker Ridge Rd. 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC32507  Sanicula bipinnatifida Thomas W. Nelson, Jane P. Nelson 1974-4-8 1142 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC41471  Sanicula bipinnatifida Richard Runyon 1977-4-23 16 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42190  Sanicula bipinnatifida Tom Duebendorfer 1977-4-23 25 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42241  Sanicula bipinnatifida Ed Cope 1977-4-23 41 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC42244  Sanicula bipinnatifida Rich White 1977-4-23 21 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62790  Sanicula bipinnatifida J. M. DiTomaso 1979-4-14 871 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC66015  Sanicula bipinnatifida Teri Bartkowski, Shane Feusier, Ruth Takaki, Carol Zimmerer 1980-4-19 2 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC66028  Sanicula bipinnatifida S. Harris, B. Ferguson, M. Smith, M. Moble 1980-4-19 Lake Along Walker Ridge Rd., 1 mi. N of junction with access road to Indian Valley Dam Comment
  HSC75312  Sanicula bipinnatifida Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC82322  Sanicula bipinnatifida Thomas W. Nelson, Jane P. Nelson 1978-4-1 3852 Lake E side of Walker Ridge, 0.25 mi. N of junction with Hwy. 20 Comment
  RSA273374  Sanicula bipinnatifida E. Cope 1977-4-23 41 -1 Lake 0.4 miles N of State Route 20 on the Walker Ridge rd. 640 Comment
  RSA471439  Sanicula bipinnatifida Carolyn Sanford 1977-4-23 345 Lake 0.4 miles north of Route 20 on the Walker Ridge Road. 640 Comment
  UCD82459  Sanicula bipinnatifida Craig Thomsen; G. Harrington 2009-5-12 2837 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. 707 Comment
  UCR138874  Sanicula bipinnatifida D. Haskamp, E. Sonnenblick, M. Taft 1995-4-2 6 Lake Blue Oak camground, 50 m west of Indian Valley Access Rd., 5 m south of Benmore Canyon Creek 541 Comment
  HSC69915  Sanicula crassicaulis Thomas W. Nelson, Jane P. Nelson 1978-4-2 3871 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC91349  Sanicula crassicaulis Amy Austin, Tony LaBanca, Noreen McClintock 1990-4-14 31 Lake Blue Oak Campground on Indian Valley Reservoir Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  UCD81083  Sanicula crassicaulis Kalynda Stone; with PLB 102 class 2009-5-3 7 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCD82730  Sanicula crassicaulis Craig Thomsen; G. Harrington 2009-5-14 2912 Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  HSC27158  Sanicula tuberosa J. P. Smith, J. O. Sawyer 1972-4-1 5157 Lake 6.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31839  Sanicula tuberosa Maralyn O'Meara, Gary S. Lester 1974-5-4 345 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  HSC33129  Sanicula tuberosa Thomas W. Nelson, Jane P. Nelson 1974-4-8 1155 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  HSC69917  Sanicula tuberosa Thomas W. Nelson, Jane P. Nelson 1978-4-2 3870 Lake Along Walker Ridge Rd., 6 mi. N of junction with Hwy. 20 Comment
  HSC91398  Sanicula tuberosa Amy Austin, Tony LaBanca, Noreen McClintock 1990-4-14 32 Lake Blue Oak Campground on Indian Valley Reservoir Rd., 2.5 mi. NE of intersection with Walker Ridge Rd. 534 Comment
  UCD128049  Sanicula tuberosa G. F. Hrusa 1992-2-29 9057 Lake approximately 2 miles north of Highway 20 on Walker Ridge Road. Comment
  UCD82528  Sanicula tuberosa Craig Thomsen; G. Harrington 2009-5-12 2884 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East-facing hillslope above (west border) Eaton Springs meadow complex. 722 Comment
  UCR139071  Saxifraga californica E. Brower, S. Marubayashi, E. Perry 1997-3-30 025 Lake Blue Oak Campground, Indian Valley Reservoir. 2.5 mi past intersection of access road and Walker Ridge Road 274 Comment
  CDA22940  Scandix pecten-veneris G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17118 Lake North Coast Ranges; Immed. below Indian Valley Res. spillway into N. Fk. Cache Creek tailrace. 396 Comment
  HSC75293  Scandix pecten-veneris Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  CDA9374  Schoenoplectus pungens var. longispicatus G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18573 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD163854  Schoenoplectus pungens var. longispicatus Craig D. Thomsen 2001-4-12 2471 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CDA20428  Scribneria bolanderi G. F. Hrusa, R. Gross, L. Houser 2008-4-11 17107 Lake North Coast Ranges; Immed. below Indian Valley Res. spillway into N. Fk. Cache Creek tailrace. 396 Comment
  CHSC101528  Scribneria bolanderi G. F. Hrusa; R. Gross, L. Houser 2008-4-11 17107 Lake Open chaparral slopes with woodland on N faces immediately below Indian Valley Reservoir spillway into North Fork Cache Creek tailrace. 396 Comment
  HSC65436  Scribneria bolanderi J. P. Smith 1974-5-4 7350 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  UCD92516  Scribneria bolanderi Glen Holstein 1978-5-6 s.n. Lake on Walker Ridge Road, ca. 1.5 miles north of State Highway 20. 731 Comment
  UCD82132  Scrophularia californica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5660 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 861 Comment
  UCD82379  Scutellaria Craig Thomsen; G. Harrington 2009-5-12 2821 Lake Lake/Colusa County line: Walker Ridge. West side of Walker Ridge Rd. Gentle saddle just off of road. 836 Comment
  UCD82729  Scutellaria Craig Thomsen; G. Harrington 2009-5-14 2910 b Colusa Colusa County on Walker Ridge: about 200 yds. south of spur road, 1/2 mile east of Walker Ridge Road, en route to Eaton Springs. 813 Comment
  UCD81706  Scutellaria californica Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5714 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 833 Comment
  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
  UC1552836  Scutellaria siphocampyloides Frederica Bowcutt 1985-5-5 504 Colusa 1 mi nw of Wilbur Springs Comment
  UCD163353  Scutellaria siphocampyloides Craig D. Thomsen 2000-5-11 2347 Lake Walker Ridge. Cold Springs area, BLM campground. Comment
  UCD81728  Scutellaria siphocampyloides Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5730 Colusa Walker Ridge. Along Walker Ridge Road. Til Jones Spring area on W side of road, ca. 6.5 road mi N of junction with Hwy 20. W side of road. 864 Comment
  HSC49863  Scutellaria tuberosa J. P. Smith, J. O. Sawyer 1978-4-29 9759 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  UC1549224  Scutellaria tuberosa Richard Olmstead 1984-4-28 522 Lake between Williams and Clear Lake (along Walker Ridge Road, 2.4 mi n of CA 20); Walker Ridge Road 777 Comment
  UC1549225  Scutellaria tuberosa Richard Olmstead 1984-4-29 524 Lake between Williams and Clear Lake (along Walker Ridge Road, 2.4 mi n of CA 20); Walker Ridge Road 777 Comment
  UCD81082  Scutellaria tuberosa Kalynda Stone; with PLB 102 class 2009-5-3 6 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of junction with Hwy 20. East side of the road. 731 Comment
  UCD83449  Scutellaria tuberosa Craig Thomsen; G. Harrington 2009-5-14 2897 Colusa Colusa County on Walker Ridge: South of spur road connecting Walker Ridge Rd and Eaton Springs. 710 Comment
  HSC31404  Senecio aronicoides Maralyn O'Meara, Gary S. Lester 1974-5-4 353 Lake Walker Ridge Rd., 1.5 mi. N from junction with Little Indian Valley Rd., 0.2 mi. S from Cold Spring Mtn. 1098 Comment
  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
  RSA298339  Senecio eurycephalus J. P. Smith 1974-5-4 7351 Lake 0.5 mile north of junction of S. R. 20 and Walker Ridge Road. 671 Comment
  UCR37893  Senecio greenei C. G. Phillips, L. Cole, S. A. Haultain, K. B. Barrows 1984-4-28 19 Lake Walker Ridge, Indian Valley Access Road, 1.1 mi. north of Blue Oak Campground, Wilbur Springs 15' Q. 854 Comment
  HSC42079  Sidalcea diploscypha E. Cope 1977-4-23 30 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC75320  Sidalcea diploscypha Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  RSA475208  Sidalcea diploscypha Aaron Liston, S. Meury 1988-5-31 750 -3 Lake 0.45 miles from jct. hwy 20 on Walker Ridge Road. 600 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
  UCD81173  Sidalcea diploscypha Angela McGinnis; with PLB 102 class 2009-5-3 5 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  UCD82533  Sidalcea diploscypha Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5685 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  UCR37889  Sidalcea diploscypha C. G. Phillips, K. B. Barrows, L. Cole, S. A. Haultain 1984-4-28 20 Lake Walker Ridge, Indian Valley Access Road, 1.1 mi. north of Blue Oak Campground, Wilbur Springs 15' Q. 854 Comment
  UCR39817  Sidalcea diploscypha K. Faber, Scott LaChance, Mike Rekart 1984-4-28 9 Lake Indian Valley access road, NE of Clearlake. 854 Comment
  UCD163840  Sidalcea hartwegii Craig D. Thomsen 2001-4-12 2470 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD82538  Sidalcea hartwegii Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5691 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 817 Comment
  UCR37526  Silene californica P. Williams, B. Kearney, M. Malamus 1984-4-28 7 Lake Blue Oak Campground 610 Comment
  UCD163341  Silene campanulata Craig D. Thomsen 2009-5-3 2812 Lake Walker Ridge, just south of Cold Spring Mountain 6.5 miles north of Hwy 20. Vicinity of Walker Ridge Rd. Along fire break road, just south of guard rail. View of Indian Valley Reservoir to the north. 1066 Comment
  HSC49109  Silene campanulata subsp. glandulosa J. P. Smith, J. O. Sawyer 1978-4-29 9776 Lake Lake-Colusa County line, Walker Ridge Rd., 0.4 mi. from T-intersection to Indian Valley Reservoir. 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
  HSC68103  Silene gallica J. P. Smith 1974-5-4 7362 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  CHSC27734  Silene laciniata subsp. californica W. K. Cheechov 1978-4-9 8 Colusa 5.1 mi w of Walker Ridge Rd., Hwy 20. 457 Comment
  HSC66653  Silene laciniata subsp. californica Cathie Goldberg, Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 7 Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  HSC85786  Silene laciniata subsp. californica Rob Marheine, Tim Tilghman, Bruce Delgado 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd., Blue Oaks Campground Comment
  HSC85826  Silene laciniata subsp. californica David Munger, Tallchief Comet, Jeff Dunk 1987-4-11 47 Lake Blue Oak Campground out Walker Ridge Rd. off Hwy. 20 E Comment
  HSC89786  Silene laciniata subsp. californica Pat Daly, Rudy Galindo 1988-4-16 43 Lake 6.1 mi. on Walker Ridge Rd. from Hwy. 20 to Blue Oak Campground 732 Comment
  HSC49861  Sisymbrium altissimum J. P. Smith, J. O. Sawyer 1978-4-29 9761 Lake Walker Ridge Rd., 1.4 mi. from its junction with Hwy. 20 671 Comment
  HSC31841  Sisymbrium officinale Maralyn O'Meara, Gary S. Lester 1974-5-4 331 Lake Walker Ridge Rd., 0.5 mi. N from junction with Hwy. 20 671 Comment
  UCD168069  Sisymbrium officinale James Neilson 1961-9-30 438 Lake 3 miles east of Grizzly Springs, Hi. 20 (Exact location unknown. Coordinates estimated by label maker.) Comment
  HSC31314  Sisyrinchium bellum Carter Schleicher 1974-5-4 27 Colusa 0.75 mi. from T junction of Walker Ridge Rd. and Indian Valley, near Clyde Mine 854 Comment
  HSC31401  Sisyrinchium bellum Maralyn O'Meara, Gary S. Lester 1974-5-4 349 Colusa Walker Ridge Rd., 0.7 mi. from junction with Little Indian Valley Rd. 854 Comment
  HSC66057  Sisyrinchium bellum Cathie Goldberg, Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 43 Lake Along Walker Ridge Rd., 1 mi. N of its junction with access road to Indian Valley Dam 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
  CDA9387  Solanum parishii G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18591 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 457 Comment
  CHSC27805  Solanum parishii Thomas E. Lewis 1978-4-8 18 Lake 8.2 km w of Walker Ridge Rd., Hwy. 20. 460 Comment
  CHSC32938  Solanum parishii Debbie Stamp; J. Spilter, C. Railey, P. Powers, C. Macdonald 1980-4-19 4 Lake Coldsprings Campground, along access road to Indian Valley Dam. On the lower slopes of the campground. Comment
  HSC66660  Solanum parishii D. Boyd, M. Eichelberger, Tim Messick, T. Ranker 1980-4-19 1 Lake Coldsprings Campground, along access rd. to Indian Valley Dam Comment
  HSC85796  Solanum parishii Rob Marheine, Bruce Delgado, Tim Tilgham 1987-4-10 Lake 8 mi. N of Hwy. 20 on Walker Ridge Rd.; 50 ft off W side of rd., opposite Blue Oak Campground Comment
  HSC86899  Solanum parishii L. Blackford, S. Branch, D. Malm 1988-4-16 39 Lake 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  UCD126971  Solanum parishii Cathie Goldberg; Lauren Philbrick, Lynn Kunstman, Geoff Walsh 1980-4-19 s.n. Lake Coldsprings Campground, along access road to Indian Valley Dam. Comment
  UCD82377  Solanum parishii Craig Thomsen; G. Harrington 2009-5-12 2819 Lake Lake/Colusa County line: Walker Ridge. On west-facing roadcut along Walker Ridge Rd. 836 Comment
  UCD84438  Solanum parishii Ellen Dean; C. Thomsen, G. Harrington, R. Wilmarth, R. Wenk 2010-6-2 6048 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
  UCD82441  Solidago velutina subsp. californica Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5668 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
  UCD82104  Sonchus asper Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5631 Lake 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. 821 Comment
  CDA40166  Spergularia rubra G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18554 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  CDA9390  Stellaria nitens G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18563 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 432 Comment
  UCD112598  Stellaria nitens Christopher Mallek 2008-4-17 WR2- 2 Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD84552  Stephanomeria Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6150 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
  HSC39706  Stipa miliacea D. E. Anderson, J. P. Smith 1971-6-23 - 1178 Lake N of Junction of Walker Ridge Rd. and Hwy. 20 along Walker Ridge Comment
  HSC60666  Streptanthus breweri J. P. Smith 1974-5-4 7364 Lake 0.5 mi. N of junction of Hwy. 20 and Walker Ridge Rd. 671 Comment
  UCD110417  Streptanthus breweri Daniel Slakey; CNPS volunteers 2011-6-11 2 Lake Walker Ridge. 0.4 miles N of Hwy. 20 on Walker Ridge Rd. Ridgetop on E side of road. 655 Comment
  UCD158696  Streptanthus breweri James A. Neilson Jr. 1983-6-18 4101 Lake Walker Ridge. Crest located 0.5 mi S of Cold Spring Mtn. 1066 Comment
  CHSC71421  Streptanthus breweri var. breweri Vernon H. Oswald; Lowell Ahart 1998-7-15 9301 Lake East side of county on Walker Ridge Rd. 6.2 mi south of Bartlett Springs Rd., 8.3 mi north of Hwy. 20. 1036 Comment
  JEPS93793  Streptanthus breweri var. breweri Vernon H. Oswald and Lowell Ahart 1998-7-15 9301 Lake e side of county on Walker Ridge Road 6.2 mi s of Bartlett Springs Road (8.3 mi n of Highway 20); Walker Ridge Road 1036 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
  CHSC4037  Streptanthus glandulosus M. Lee 1967-4-29 19 Lake On N. side of Hwy 20 ca. 26 mi. west of Williams. 426 Comment
  CAS-BOT-BC87117  Streptanthus glandulosus subsp. glandulosus Barbara Sherfey 1963-3-1 s.n. Lake 2 miles east (up the canyon) from Indian Valley on road to Bartlett Springs. Comment
  JEPS16208  Styrax officinalis var. redivivus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3187 Lake on Bartlett Mt. Road grade up over first ridge w Bear Valley (just w of Colusa-Lake County line); Inner North Coast Ranges, w of Bear Valley Comment
  UC1053471  Styrax officinalis var. redivivus Rimo Bacigalupi and Arthur Holmgren 1950-4-26 3187 Lake on Bartlett Mt. Road grade up over first ridge w Bear Valley (just w of Colusa-Lake County line); Inner North Coast Ranges Comment
  CAS-BOT-BC48038  Styrax redivivus Clare R. Wheeler 1978-4-29 264 Lake Walker Ridge. Along Colusa - Lake county boundry off Hwy. 20. 609 Comment
  SBBG83456  Styrax redivivus C. C. Shock 1980-5-3 68 Colusa 2 mi W of base of Bear Valley, 14.6 mi N of St Hwy 20, E of Walker Ridge 487 Comment
  UCD163316  Styrax redivivus Craig D. Thomsen 1997-4-13 1905 Colusa Bear Valley. About 6 miles north of Hwy 20. Vicinity of Trout Creek, north of Deadshot Canyon. Comment
  UCD163844  Styrax redivivus Craig D. Thomsen 2000-6-1 s.n. Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  UCD84535  Symphoricarpos albus Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6135 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  CDA26544  Taeniatherum caput-medusae G. F. Hrusa, R. Gross 2008-5-23 17401 Lake North Coast Ranges; Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  UCD82119  Taeniatherum caput-medusae Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5647 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
  CHSC78086  Taraxia ovata Terry Nelson 1998-4-4 240 -2 Lake In a pasture 6 mi w of jct of Hwys 20 and 16, 150 ft. se of the jct of Hwy 20 and Walker Ridge Rd. 606 Comment
  UCD163339  Tauschia kelloggii Craig D. Thomsen 2009-5-3 2810 Lake Walker Ridge. North of Til Jones Spring. 990 Comment
  UCD163838  Tetrapteron graciliflorum Craig D. Thomsen 2001-4-12 2467 Colusa Bear Valley. About 7 miles north of Hwy 20. Comment
  CAS-BOT-BC240289  Thalictrum fendleri Craig D. Thomsen; J. Wiegand; S. Harrison; G. Harrington; A. Fulks 2008-4-22 2730 Colusa Walker Ridge. Eaten Springs, 4 mi N of Hwy 20, ca. 1.5 mi E of Walker Ridge Rd. 609 Comment
  UCD81708  Thalictrum fendleri var. polycarpum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5715 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
  UCD81709  Thalictrum fendleri var. polycarpum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5715 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
  UCD82585  Thalictrum fendleri var. polycarpum Craig D. Thomsen; J. Wiegand, S. Harrison, G. Harrington, A. Fulks 2008-4-22 2730 Colusa Walker Ridge. Eaton Springs, 4 mi N of Hwy 20, ca. 1 mi E of Walker Ridge Rd. 609 Comment
  CHSC106243  Thelypodium brachycarpum B. Castro; L. P. Janeway 2001-6-3 1259 Colusa Inner North Coast Ranges. 'Til Jones Spring' at headwaters of Freshwater Branch of E. Fork Sulphur Ck, 0.6 mi E of top of Walker Ridge. Ca 3 air mi W of S end of Bear Valley, and 1.75 air mi SSE of Cold Spring Mtn. Just downslope from Walker Ridge Rd., in opening in surrounding serpentine chaparral. 822 Comment
  UC1552719  Thelypodium brachycarpum Frederica Bowcutt 1985-6-19 597 Colusa just sw Bear Valley (ridge about 2 air mi nw of Wilbur Hot Springs); Wilbur Springs Quad. (15') Comment
  UC1552722  Thelypodium brachycarpum Frederica Bowcutt 1985-6-19 601 Colusa just sw Bear Valley (ridge about 2 air mi nw of Wilbur Hot Springs); Wilbur Springs Quad. (15') Comment
  CDA40173  Thysanocarpus curvipes G. F. Hrusa, R. Gross, G. Holstein 2014-5-14 18560 Lake North Coast Ranges; Silver Spur Ranch. Benmore Canyon at intersection of Box Canyon, 1 1/2 mi. S of spillway at Indian Valley Reservoir. 442 Comment
  HSC28220  Thysanocarpus curvipes J. P. Smith, J. O. Sawyer 1972-4-1 5111 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC41842  Thysanocarpus curvipes N. G. Sugihara 1977-4-23 29 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC41878  Thysanocarpus curvipes Lloyd Simpson 1977-4-23 270 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44277  Thysanocarpus curvipes D. L. Goforth 1977-4-23 12 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62927  Thysanocarpus curvipes Terry Roth 1979-4-14 7 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC75314  Thysanocarpus curvipes Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  UCR138876  Thysanocarpus curvipes J. Marshall, J. Savage, L. Allison 1997-3-29 9 Lake Blue Oak Campground, Mount Diablo Meridian. Indian Valley Reservoir access road, 2.5 mi past intersection of access road and Walker Ridge Rd 274 Comment
  UCD81920  Thysanocarpus curvipes subsp. curvipes Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5501 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCR37570  Thysanocarpus curvipes var. elegans Michelle A. Strull, C. Houseman, L. Linstedt 1984-4-28 4 Lake 23 mi. NE of Clearlake Oaks via Hwy 20 and Walker Ridge Road 610 Comment
  HSC33128  Thysanocarpus radians Thomas W. Nelson, Jane P. Nelson 1974-4-8 1154 Lake 200 m E of Oasis Resort, 13 mi. E of Clear Lake Oaks along Hwy. 20 Comment
  CHSC23891  Tonella tenella E. E. Booker 1975-4-5 20 Lake 18 mi sw of Williams. 609 Comment
  CHSC27554  Tonella tenella Scott E. Patton 1978-4-9 10 Lake Jct Hwy 20 and Walker Ridge Rd, ca. 6 m w of jct Hwys 20 and 16. 606 Comment
  CHSC27849  Tonella tenella Phil Blumert 1978-4-8 3 Colusa Jct. Hwy 20 and Walker Ridge Rd, ca. 6 mi w of jct of Hwys 20 and 16. 606 Comment
  CHSC7152  Tonella tenella Bryan C. Willingham 1969-4-12 22 Lake Ca 2000 ft w of Abbot Mine, s side of Hwy. 20. 585 Comment
  CHSC90163  Tonella tenella Judy Mosbacher 1984-3-31 82 Lake Jct. hwy 20 and Walker Ridge Rd., ca. 6 mi w of jct of hwys 20 and 16. 606 Comment
  CDA26548  Torilis arvensis G. F. Hrusa, R. Gross 2008-5-23 17395 Lake North Coast Ranges; Crossing of Box Cyn. Creek in upper Benmore Canyon immed. E and S of Indian Valley Reservoir spillway. 457 Comment
  CHSC101522  Torilis arvensis G. F. Hrusa; R. Gross 2008-5-23 17395 Lake Crossing of Box Canyon Creek in upper Benmore Canyon immediately east and south of Indian Valley Reservoir spillway. 457 Comment
  UCD82121  Torilis arvensis Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5649 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 839 Comment
  CAS-BOT-BC234976  Torreya californica Ellen Dean; G. Harrington; K. Mawdsley; J. Shepard 2010-5-1 5950 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
  HSC24874  Torreya californica J. P. Smith, J. O. Sawyer 1972-2-12 5053 Lake Walker Ridge Rd. S of Baldy Mtn. near boundary of Lake and Colusa Co. Comment
  HSC41927  Torreya californica Ed Cope 1977-4-23 46 Lake Walker Ridge Rd. Comment
  UCD83753  Torreya californica Ellen Dean; G. Harrington, K. Mawdsley, J. Shepard 2010-5-1 5950 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
  HSC31870  Toxicodendron diversilobum Gary S. Lester 1974-5-4 121 Lake Along Walker Ridge Rd., 0.5 mi. from junction with Hwy. 20 671 Comment
  UCD112603  Toxicoscordion Christopher Mallek 2008-4-17 s.n. Colusa Walker Ridge. Border of Colusa and Lake Counties. 802 Comment
  UCD139838  Toxicoscordion fremontii Cathie Goldberg; Lynn Kunstman, Lauren Philbrick, Geoff Walsh 1980-4-19 33 Lake along Walker Ridge Road, 1.3 miles south of junction with access road to Indian Valley Dam. Comment
  UCD81174  Toxicoscordion fremontii Angela McGinnis; with PLB 102 class 2009-5-3 6 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road miles north of the intersection with Hwy 20. East side of the road. 731 Comment
  UCD81861  Toxicoscordion venenosum Ellen Dean; K. Mawdsley,G. Harrington,R. Wilmarth,B. Rice,E. Salvia 2009-5-27 5744 a Lake Walker Ridge. Picnic area near Cold Spring. 912 Comment
  UCD82103  Tragopogon dubius Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5630 Lake 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. 821 Comment
  UCD84564  Tragopogon dubius Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6089 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD84566  Tragopogon porrifolius Ellen Dean; C. Thomsen, G. Harrington, Davis Botanical Society 2010-6-5 6091 Lake Walker Ridge. Picnic Area near wetland/marsh. 899 Comment
  UCD82530  Trichostema Craig Thomsen; G. Harrington 2009-5-12 2886 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. 710 Comment
  UCD82617  Trichostema Craig Thomsen; G. Harrington 2009-5-12 2886 Colusa Colusa County on Walker Ridge. Eaton Springs, about 1 mile east of Walker Ridge Rd. East- facing hillslope above (and west border of) Eaton Springs meadow complex. 710 Comment
  CHSC88578  Trichostema laxum L. P. Janeway 2001-6-6 7113 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. Meadow opening. 713 Comment
  RSA700359  Trichostema laxum L. P. Janeway 2001-6-6 7113 Colusa Inner North Coast Ranges. Eaton Springs, about 2.4 km east of Walker Ridge Road. 703 Comment
  HSC27424  Trifolium albopurpureum J. P. Smith, J. O. Sawyer 1972-4-1 5122 Lake 0.2 mi. N of junction of Hwy. 20 and Walker Ridge Rd. Comment
  HSC31575  Trifolium albopurpureum Teresa Prendusi 1974-5-4 27 Lake Walker Ridge, 0.5 mi. N of junction with Hwy. 20 671 Comment
  HSC31696  Trifolium albopurpureum Bonnie Prange 1974-5-4 Lake Near Walker Ridge Rd., 0.5 mi. N of junction with Hwy. 20. 671 Comment
  HSC44253  Trifolium albopurpureum Barbara Kelly 1977-4-23 331 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC62786  Trifolium albopurpureum Thomas Wood 1979-4-14 103 Lake 0.4 mi. N of S.R. 20 on the Walker Ridge Rd. 640 Comment
  UCD163333  Trifolium albopurpureum Craig D. Thomsen 2009-5-3 2802 Colusa Walker Ridge. Vicinity of Walker Ridge Rd., about 0.5 miles north of Hwy 20. Comment
  UCD82138  Trifolium albopurpureum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5678 Colusa Walker Ridge. Along Walker Ridge Road, ca. 0.5 road mi N of intersection with road to Indian Valley Reservoir. Parking area, undeveloped roads, flats and slopes on W side of road. 843 Comment
  HSC42256  Trifolium bifidum N. G. Sugihara 1977-4-23 23 Lake 0.4 mi. N of SR 20 on the Walker Ridge Rd. 640 Comment
  HSC44114  Trifolium bifidum Barbara Kelly 1977-4-23 331 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC44306  Trifolium bifidum Barbara Kelly 1977-4-23 381 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  UCD81190  Trifolium bifidum Robinder Aulakh; with PLB 102 class 2009-5-3 2 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  HSC95601  Trifolium bifidum var. bifidum A. Skelly, G. McCabe, B. Bletcher 1996-5-4 48 Lake Benmore Canyon, 5.3 mi. W of Walker Ridge on Indian Res. Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Blue Oak Campground 549 Comment
  UCSC010416  Trifolium bifidum var. bifidum Dylan M. Neubauer, Tim Forsell 2016-3-31 606 Lake (NCoRI) Walker Ridge, Walker Ridge Road, .47 air-mile nne junction with Highway 20 663 Comment
  UCD81902  Trifolium depauperatum Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5483 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road mi N of intersection with Hwy 20. E side of road. 653 Comment
  CHSC7151  Trifolium depauperatum var. amplectens R. B. Watkins 1969-4-19 15 Lake 15 mi se of Clear Lake on w side of Hwy 20 between Williams and Clear Lake. 365 Comment
  HSC30771  Trifolium depauperatum var. truncatum J. P. Smith, J. O. Sawyer 1972-4-1 5148 Lake Along Walker Ridge Rd., 0.2 mi. from junction with Hwy. 20 Comment
  HSC42243  Trifolium dichotomum Rich White 1977-4-23 20 Lake 0.4 mi. N of Hwy. 20 on the Walker Ridge Rd. 640 Comment
  HSC75322  Trifolium dichotomum Teresa Prendusi 1977-4-23 Lake 0.4 mi. N of Hwy. 20 on Walker Ridge Rd. 640 Comment
  HSC87052  Trifolium dichotomum L. Blackford, S. Branch, D. Malm 1988-4-16 59 Colusa 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  UCD81071  Trifolium dichotomum Catherine Yasuda; with PLB 102 class 2009-5-3 1 Lake Walker Ridge. Along Walker Ridge Road, ca. 0.6 road miles north of junction with Hwy 20. East side of the road. 649 Comment
  HSC89691  Trifolium gracilentum var. gracilentum William E. Avery, Mathew Henry Bergvall-Mensor, Steve Wilson 1989-4-15 Lake Blue Oak Campground, 7.7 mi. N of Hwy. 20 just W of Walker Ridge Rd. 152 Comment
  HSC87053  Trifolium hirtum L. Blackford, S. Branch, D. Malm 1988-4-16 38 Lake 6.1 mi. on Walker Ridge Rd. off Hwy. 20 at Blue Oak Campground 732 Comment
  HSC92507  Trifolium hirtum D. Haskamp, E. Sonnenblick, M. Taft 1995-5-6 47 Lake Blue Oak Campground, on Walker Ridge Rd., 200 m W of campsites along Benmore Canyon Creek. 537 Comment
  HSC95465  Trifolium hirtum A. Skelly, G. McCabe, B. Bletcher 1996-5-4 43 Lake Benmore Canyon, 5.3 mi. W of Walker Ridge on Indian Res. Rd., 57 mi. E of Hwy. 101 on Hwy. 20, Blue Oak Campground 549 Comment
  UCD84541  Trifolium hirtum Ellen Dean; C. Thomsen, T. Hansen, and windfarm meeting 2010-6-11 6140 Lake Walker Ridge. Along Walker Ridge Rd by first turnout (cleared area) north of Hwy 20. W side of road. 608 Comment
  UCD81938  Trifolium microcephalum Ellen Dean; PLB102 students, D. Potter, G. Harrington, C. Thomsen 2009-5-3 5519 Lake Walker Ridge. Along Walker Ridge Road, ca. 1.9 road mi N of intersection with Hwy 20. E side of road in burn area - burned in summer of 2008. 755 Comment
  UCD82100  Trifolium microcephalum Ellen Dean; G. Harrington, C. Thomsen,Chiao-Yi Cheng,R. Wilmarth 2009-5-20 5627 Lake 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. 821 Comment