Search Results — 2000 specimen records retrieved (1981 records with coordinates)
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Results for search: Collector=Helmkamp;   

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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCR171349  Abies George K. Helmkamp, E. A. Helmkamp 2005-10-1 9995 Placer Northern Sierra Nevada Mtns., NW of Lake Tahoe; Junction of Bear Creek Dr. and Big John Road (c. 2.2 miles west of Calif. Highway 89 and just south of Alpine Meadows Road) 2015 Comment
  UCR104848  Abronia villosa George K. Helmkamp, E. Helmkamp 1998-1-23 2567 Imperial Sonoran (Colorado) Desert, On the W side of Hwy 86, 18.8 mi. NW of Westmorland -30 Comment
  HSC79209  Acamptopappus sphaerocephalus var. sphaerocephalus G. K. Helmkamp 1984-4-20 18 San Bernardino TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside pipeline road in upper part of TNC area 765 Comment
  UCR193284  Acer macrophyllum George K. Helmkamp, E. A. Helmkamp 2007-6-12 12353 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road 0.6 mile north of Hwy CA-20, at the border of Placer Co. 1387 Comment
  SD236171  Achillea millefolium G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13861 Alpine Eastern Sierra Nevada Mountains: Blue Lake Road just southeast of its junction with CA-88 2180 Comment
  UCR170827  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2005-9-30 9962 Placer Northern Sierra Nevada Mtns., Junction of Chalet and Alpine Meadows Roads west of Calif. Highway 89 (near Alpine ski area) 2081 Comment
  UCR235123  Achillea millefolium George K. Helmkamp, William Barnes 2010-9-4 16931 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR250679  Achillea millefolium George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20690 Calaveras Northern Sierra Nevada Mountains Foothills, Whiskey Slide Road, just east of West Murray Creek Road, c. 4.7 miles SE of Jesus Maria Road 677 Comment
  UCR216029  Achnatherum lemmonii George K. Helmkamp, E. A. Helmkamp 2009-7-30 15328 Calaveras Sierra Nevada Mountains, Ganns Meadow Drive just south of its junction with CA-4, 16.7 miles northeast of Arnold 2067 Comment
  UCR241375  Achnatherum occidentale subsp. californicum George K. Helmkamp, E. A. Helmkamp 2012-6-26 19253 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.4 mile south of its junction with CA-88/Carson Pass Hwy and W of Lower Bear Reservoir 1643 Comment
  SD237295  Achyrachaena mollis G. K. Helmkamp, E. A. Helmkamp 2010-5-4 15946 Solano Sacramento Valley: just NE of Vacaville, north side of Vaca Valley Parkway, 0.1 mile west of its junction with Crescent Drive. 35 Comment
  UCR104870  Achyronychia cooperi George K. Helmkamp 1998-3-30 3003 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR122659  Achyronychia cooperi George K. Helmkamp, E. A. Helmkamp 1998-3-16 2855 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  SD212607  Acmispon americanus var. americanus G. K. Helmkamp, Elizabeth Helmkamp 2005-7-31 9727 El Dorado Junction of Ice House Road and Ca Highway 50, east of Pollock Pines. 1006 Comment
  UCD104064  Acmispon brachycarpus G. K. Helmkamp; E. A. Helmkamp 2007-3-25 11711 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 0.9 mile east of its junction with CA-49 at the bridge of the junction with American River forks. 287 Comment
  UCD104258  Acmispon nevadensis var. nevadensis G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11053 El Dorado Northern Sierra Nevada Mtns: along Wright's Lake Road (Forestry Route 4) 3.3 miles north of Hwy US-50. 2049 Comment
  CAS-BOT-BC228611  Acmispon parviflorus George K. Helmkamp; E. A. Helmkamp 2011-6-7 17460 Amador Northern Sierra Nevada Mountains Foothills: Pine Gulch Road, 0.5 mile north of its intersection with Sutter Creek Road 457 Comment
  UCD104274  Acmispon procumbens var. procumbens G. K. Helmkamp; E. A. Helmkamp 2001-4-29 6562 San Luis Obispo San Luis Obispo County: Irish Hills: Clark Valley Rd., 2.8 mi S of Los Osos Valley Rd (E of Los Osos). 91 Comment
  UCR232164  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2010-8-3 16681 Calaveras Northern Sierra Nevada Mountains, along CA-4 at the Arnold Byway, about 0.3 mile northeast of Arnold 1244 Comment
  UCR119244  Adiantum jordanii George K. Helmkamp, E. A. Helmkamp 1998-6-30 4218 San Luis Obispo Coast Ranges, Irish Hills 343 Comment
  SD224990  Aesculus californica G. K. Helmkamp, E. A. Helmkamp 1997-6-25 2100 Mendocino State Hwy 128 about 5 mi. NW of Cloverdale. 427 Comment
  UCR87842  Agoseris George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 8 -12 Alpine Sierra Nevada Mtns., Monitor Pass, along Calif. Hwy 89 2530 Comment
  UCR14521  Agoseris apargioides George K. Helmkamp 1974-4-28 s.n. San Luis Obispo Central Coast, Cuesta Summit north of [San Luis Obispo] Morro Bay Comment
  CLARK-A1045-1045  Agoseris glauca var. monticola George K. Helmkamp 1977-7-2 Mono Long Valley corner of US Highway 395 and Owens River Road; ; ; Old Mammoth 7.5'Q 2194 Comment
  CLARK-A1045-499  Agoseris heterophylla George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains at the north end of Lake; sagebrush scrub; ; Big Bear City 7.5'Q 2133 Comment
  UCR60017  Agropyron cristatum George K. Helmkamp 1988-9-7 s.n. Mono Eastern Sierra Nevada Mountains, Hwy 395, 29 miles north of Inyo Co. line 2195 Comment
  UCR209037  Agrostis George K. Helmkamp, E. A. Helmkamp 2009-8-19 15497 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  UCR124185  Agrostis densiflora George K. Helmkamp, E. A. Helmkamp 2000-6-18 5720 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR232258  Agrostis gigantea George K. Helmkamp, E. A. Helmkamp 2010-8-3 16703 Calaveras Northern Sierra Nevada Mountains, Forest Route 7N23 (Black Creek Road) 0.1 mile north of the junction with CA-4 2005 Comment
  UCR233415  Agrostis idahoensis George K. Helmkamp, E. A. Helmkamp 2011-9-13 18244 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 21.4 rd. miles southeast of Jenkinson's Lake, between Silver Fork Road and Hwy 88, 1.1 mi. NW (331 deg. ) of Alder Hill 2270 Comment
  UCR89434  Agrostis idahoensis George K. Helmkamp 1990-8-2 s.n. Mono Sierra Nevada Mtns, between Mammoth and Lake Mary 2591 Comment
  UCD67032  Agrostis pallens G. K. Helmkamp; E. A. Helmkamp 2007-9-11 12923 El Dorado Northern Sierra Nevada Mountains: Along Hwy. US-50, 0.4 mile southwest of Phillips. 1829 Comment
  SEINET9260361 Image available Agrostis scabra George K. Helmkamp, Amy Barnes 2013-1 22322 Alpine Northern Sierra Nevada Mountains: northern edge of Mosquito Lake along CA-4/Ebbetts Pass road (Pacific Valley 7.5' Q) Comment
  UCD66099  Agrostis scabra G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12761 Amador Northern Sierra Nevada Mountains: along the south side of Bear River Reservoir just east of the spillway. 1777 Comment
  UCR176474  Agrostis scabra George K. Helmkamp, E. A. Helmkamp 2006-8-7 11187 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  UCR252985  Agrostis scabra George K. Helmkamp, Amy Barnes 2013-9-23 22322 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  LA103347  Agrostis scabra G. K. Helmkamp; 1905-9-10 885 -45 Mono edge of Lake Mamie, bordered by Yellow Pine Forest 2590 Comment
Read comments
Aug 23 2019
  CAS-BOT-BC334492  Agrostis stolonifera G. K. Helmkamp; Amy Barnes 2013-9-24 22381 Tuolumne Northern Sierra Nevada Mountains: Boards Crossin gof the North Fork of the Stanislaus River 1244 Comment
  SEINET3257987 Image available Agrostis stolonifera George K. Helmkamp, E. A. Helmkamp 2007-9-4 12893 Amador Northern Sierra Nevada Mountains; along CA-88 at Mile-49, 3.1 miles east of Hams Station. 1860 Comment
  UCD74335  Agrostis stolonifera G. K. Helmkamp; E. A. Helmkamp 2007-8-29 12841 Yuba Northern Sierra Nevada Mountains: along Hwy. CA-49, 0.5 mile south of Camptonville. 817 Comment
  UCR242795  Agrostis variabilis George K. Helmkamp, E. A. Helmkamp 2010-9-1 16909 Amador Northern Sierra Nevada Mountains, Dufrene Road 0.7 mile east of its junction with CA-88, north of Lower Bear River Reservoir 2044 Comment
  UCR261994  Agrostis variabilis George K. Helmkamp, Amy Barnes 2014-10-10 23146 Amador Northern Sierra Nevada Mountains, Plasse Road at the south end of Silver Lake and 0.1 mile north of Plasse's Resort 2215 Comment
  RSA0081169  Ailanthus altissima George K. Helmkamp, E. A. Helmkamp 2006-10-6 11465 Amador Along Calif. Hwy 49 near Enterprise, 1.8 miles south of El Dorado Co. line. 274 Comment
  UCR179567  Ailanthus altissima George K. Helmkamp, E. A. Helmkamp 2006-10-6 11465 Amador Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49 near Enterprise, 1.8 miles south of El Dorado Co. line 274 Comment
  UCR160376  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 2005-6-7 9540 San Luis Obispo Outer South Coast Ranges, along Huasna Road, 1.3 mile west of Huasna Townsite Road 305 Comment
  CAS-BOT-BC520349  Alisma lanceolatum George K. Helmkamp; E. A. Helmkamp 2012-10-9 20002 Nevada Northern Sierra Nevada Mountains Foothills: Higgins Corner, Combie Road, 0.1 mi E of jct with CA-49, between Auburn and Grass Valley 445 Comment
  SD237250  Allium campanulatum G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15265 El Dorado Sierra Nevada Mountains: Wrights Lake Road, 4.1 miles north of its junction with US-50 and at the north sie of Lyons Creek crossing. 2015 Comment
  SD237252  Allium campanulatum G. K. Helmkamp, E. A. Helmkamp 2010-7-13 16550 Alpine Northern Sierra Nevada Mountains: Sno-Park area at Carson Pass; northeast side of CA-88 across from the trailside parking area. 2613 Comment
  UCD138508  Allium campanulatum G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-19 10744 El Dorado Northern Sierra Nevada Mountains: 6.0 miles east of Ice House Road on the road to Wright's Lake. 2000 Comment
  CLARK-A1045-511  Allium fimbriatum George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north of State Highway 38 at north end of Lake; sagebrush scrub at edge of junipers; ; Big Bear City 7.5' Q 2133 Comment
  UCR206607  Allium validum George K. Helmkamp, Ann Kerchner 2009-7-25 15283 Amador Sierra Nevada Mountains, south side of CA-88, 3.2 miles west of the Alpine Co. line; near Martin Meadow 2306 Comment
  UCR157807  Allophyllum gilioides George K. Helmkamp, E. A. Helmkamp 1998-6-29 4198 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  RSA792070  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2012-7-14 19396 Amador Northern Sierra Nevada Mountains: edge of Martin Meadow along CA-88 (Carson Pass highway), 2.2 miles north of Silver Lake. 2317 Comment
  RSA794816  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2010-8-7 16729 El Dorado Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring. 2136 Comment
  SD239870  Allophyllum integrifolium G. K. Helmkamp, E. A. Helmkamp 2011-8-6 17952 Amador Northern Sierra Nevada Mountains: Ellis Road, 2.1 miles south of its junction with CA-88 (Peddler Hill 7.5'Q) 1794 Comment
  SD248472  Allophyllum integrifolium George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-19 20913 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, north side of its junction with Mormon Emigrant Trail (Tragedy Spring 7.5'Q) 2188 Comment
  SEINET11266308  Allophyllum integrifolium George Helmkamp, E. A. Helmkamp 2010-8-7 16729 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring (Tragedy Spring 7.5' Q.); 0 2135 Comment
  SEINET4691406  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2010-1 16729 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trial, at Jim Quinn Spring. 2136 Comment
  UCR206732  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2009-7-2 15093 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR229554  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2011-7-26 17903 Placer Northern Sierra Nevada Mountains, Bowman Lake Road, 0.9 mile north of its junction with CA Hwy 20, 0.85 mi. NE (23 deg. ) of Emigrant Gap and N of I-80 1434 Comment
  UCR233353  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2011-9-13 18264 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road, 0.6 miles north of its junction with CA-88 2136 Comment
  UCR237716  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2012-7-14 19396 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  UCR121530  Alnus rhombifolia George K. Helmkamp, E. A. Helmkamp 2002-4-21 7617 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 11.2 mi east of Cambria 396 Comment
  CAS-BOT-BC523902  Amaranthus albus George K. Helmkamp; Mary Alice Barnes 2013-5-17 20629 Calaveras Northern Sierra Nevada Mountains Foothills: Poloma Rd at its jct with Cosgrove Creek Rd., 3 mi NE (30 deg. ) of Valley Springs 278 Comment
  SEINET3856760 Image available Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17037 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  UCD97158  Amaranthus albus G. K. Helmkamp; E. A. Helmkamp 2007-9-22 12992 El Dorado Northern Sierra Nevada Mountains: along Pleasant Valley Road (Hwy CA-49) 0.8 mile west of its junction with Missouri Flat Road in Diamond Springs. 532 Comment
  UCR194720  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2007-10-13 13082 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR201740  Amaranthus blitoides George K. Helmkamp, E. A. Helmkamp 2008-10-6 14213 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  SEINET270119 Image available Ambrosia acanthicarpa G. Helmkamp 1993-9-22 34 -10 San Bernardino 6.7 miles up Burns Canyon from the junction of Pioneer Town and Pipes Canyon roads 1524 Comment
  UCR104874  Ambrosia dumosa George K. Helmkamp 1998-4-4 3148 Riverside Sonoran (Colorado) Desert, junction of Calif. Hwy 62 (Twentynine Palms Hwy) & Calif. Hwy 177 (Desert Center-Rice Rd) 457 Comment
  UCR130999  Ambrosia eriocentra George K. Helmkamp, E. A. Helmkamp 1998-5-3 3519 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  CLARK-A1045-747  Amphipappus fremontii George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains limestone canyon east of Winters Pass; ; Clark Mt. 15'Q 1097 Comment
  SD241775  Amsinckia intermedia G. K. Helmkamp, E. A. Helmkamp 2010-4-17 15895 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, about 0.2 mile northeast of the entrance to the Folsom Lake recreational area. 305 Comment
  UCR140106  Amsinckia intermedia George K. Helmkamp 2004-2-7 8255 San Luis Obispo Central Coast, SE of Oceano along Halcyon Rd., just east of Mesa View Dr. 76 Comment
  UCR217879  Amsinckia intermedia George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16138 El Dorado Sierra Nevada Mountains Foothills, along Perry Creek, about 0.2 mile south of Slug Gulch Road, at a point 4.7 miles east of junction with Perry Creek Road 1027 Comment
  UCR222550  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2010-4-17 15895 Placer Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, about 0.2 mile northeast of the entrance to the Folsom Lake recreational area 305 Comment
  UCR237311  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2012-4-14 18761 Butte Northwestern Sacramento Valley, entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River 46 Comment
  UCR250187  Amsinckia intermedia George K. Helmkamp 2013-3-14 20168 Calaveras Central Sierra Nevada Foothills, Junction of CA-26 and Paloma Road southwest of Mokelumne Hill 470 Comment
  UCR173162  Amsinckia lycopsoides George K. Helmkamp, Elizabeth Helmkamp 2006-4-25 10223 El Dorado Northern Sierra Nevada Foothills, E of Sacramento and just SW of Placerville. Forni road between US Hwy 50 and Diamond Springs, at Weber Creek 488 Comment
  UCR207886  Amsinckia retrorsa George K. Helmkamp, E. A. Helmkamp 2009-4-22 14581 Placer Sierra Nevada Mountains Foothills, Forest Hill road near Grizzly Bear House, about one mile northeast of the road to the lower end of Clementine Lake 732 Comment
  UCR91832  Amsinckia spectabilis var. spectabilis George K. Helmkamp 1996-5-27 1084 San Luis Obispo Central Coast, Los Osos, northeast of the corner of Martingale Avenue and Buckskin Drive 61 Comment
  UCR101087  Amsinckia tessellata var. tessellata George K. Helmkamp, E. A. Helmkamp 1998-4-7 3184 Kern 3 mi. north of Maricopa on Calif. Hwy 33 252 Comment
  RSA567424  Amsonia brevifolia var. tomentosa George K. Helmkamp 1993-9-22 35 -6 San Bernardino Steep canyon side with Pinon Pine. 14.4 mi. up Burns Canyon from junction of Pioneer Town and Pipes Cyn Rds. 2073 Comment
  UCR123376  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 1999-6-29 5055 Placer Sierra Nevada Foothills, corner of Dry Creek Rd & Bowman Rd, near Nielsburg, 3 mi NE of Auburn beside I-80 & 1.5 NW of North Fork Lake on American River 457 Comment
  UCD128839  Anaphalis margaritacea G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11009 El Dorado Northern Sierra Nevada Mountains: Echo Summit along Hwy US-50; at entrance to the road maintenance station. 2245 Comment
  UCR261983  Anaphalis margaritacea George K. Helmkamp, Amy Barnes 2014-10-10 23135 Amador Northern Sierra Nevada Mountains, west side of Bear River Reservoir, 0.2 mile north of the dam 1796 Comment
  UCD67030  Andropogon virginicus var. virginicus G. K. Helmkamp; E. A. Helmkamp 2007-9-9 12913 Sacramento Sacramento Valley: Along Hwy. CA-16, 0.8 mile west of the Amador County line. 85 Comment
  SD243059  Angelica breweri George K. Helmkamp, E. A. Helmkamp 2010-7-28 16680 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 1.8 miles east of Forest Route 13 / American Hill Road. Burn area north of the road. 1662 Comment
  UCD127127  Angelica breweri G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11026 El Dorado Northern Sierra Nevada Mtns: North Truckee River Rd., 1.4 miles north of CA-50 and ca. 6 miles south of Lake Tahoe. 2009 Comment
  UCR176204  Angelica breweri George K. Helmkamp, E. A. Helmkamp 2006-8-3 11106 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR14463  Angelica lineariloba George K. Helmkamp 1974-6-10 s.n. Inyo Sierra Nevada Mtns., Pine Creek, NW part of county 2287 Comment
  UCR124009  Angelica tomentosa George K. Helmkamp, E. A. Helmkamp 2001-7-8 6950 Trinity North Coast Range; Trinity Mountains, Calif. Hwy 36, 7 mi west of Wildwood at Telephone Ridge 1280 Comment
  UCR122884  Anisocarpus madioides George K. Helmkamp, E. A. Helmkamp 2001-5-29 6703 San Benito South Coast Range, Gabilan Range, 7.1 mi. south of San Juan Bautista on Hwy G-1 488 Comment
Read comments
Jan 7 2013
  UCR124005  Antennaria argentea George K. Helmkamp, E. A. Helmkamp 2001-7-8 6943 Trinity Trinity Mountains, Calif. Hwy 36, 2.2 mi west of the Trinity/Shasta Co. line 1159 Comment
  RSA785463  Antennaria corymbosa George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16582 El Dorado Southernmost point of Wright's Lake, 5.6 mi. NE (33 deg. ) of Kyburz 2085 Comment
  UCR59790  Antennaria rosea George K. Helmkamp 1989-7-31 s.n. Mono Sierra Nevada Mtns, just south of Mammoth Village [in Mammoth Lakes] and at the edge of Snow Creek [Golf Course] 2439 Comment
  UCD128943  Antennaria rosea subsp. rosea G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10958 El Dorado Northern Sierra Nevada Mtns Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges. 1960 Comment
  UCR218639  Anthemis cotula George K. Helmkamp, E. A. Helmkamp 2010-6-4 16219 Sonoma North Coast Ranges, Mark West Springs Road (Porter Creek Rd.), about five miles east of its junction with US-101, 5.85 air mi. east (88 deg. ) of Windsor 145 Comment
  UCR101615  Anthriscus caucalis George K. Helmkamp, E. A. Helmkamp 1998-5-16 3745 San Mateo Portola Valley, Golden Hills Rd along Los Trancos Creek 107 Comment
  UCR176282  Anthriscus caucalis George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10427 B Placer Northern Sierra Nevada foothills, 2.1 mi south of Auburn along Calif. Hwy 49 293 Comment
  SEINET3282795 Image available Apocynum androsaemifolium George K. Helmkamp, E. A. Helmkamp 2009-7-16 15208 Placer Sierra Nevada Mountains; Forest Hill Road, 24.6 miles northeast of the city of Foresthill, near Ford Point. 1698 Comment
  UCR124006  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2001-7-8 6955 Trinity North Coast Range; Trinity Mountains, Calif. Hwy 36, 7 mi west of Wildwood at Telephone Ridge 1280 Comment
  UCR129529  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2001-5-31 6752 Santa Clara San Francisco Bay, Mt. Hamilton Rd. east of San Jose at Mile-15 290 Comment
  UCR175718  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2006-7-10 10928 El Dorado Northern Sierra Nevada Mountains, 0.3 mile west of the junction of Wright's Lake Road and the road from Ice House Reservoir 2012 Comment
  UCR229407  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2011-7-30 17940 El Dorado Northern Sierra Nevada Mountains, North-South Road, 5.5 miles north of its junction with Omo Ranch Road, east side of bridge over Pi Pi Creek 1209 Comment
  UCR233286  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2010-9-23 16955 El Dorado Northern Sierra Nevada Mountains, Forest Route 31, 3.4 miles north of its junction with Peavine Ridge Road and Round Tent Canyon Road 1463 Comment
  UCD114105  Arabidopsis thaliana G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11844 Calaveras Northern Sierra Nevada Mountains: Chili Gulch near McSorley Ranch, along Hwy CA-49, 5.1 miles south of the Amador County line. 370 Comment
  UCR188444  Arabidopsis thaliana George K. Helmkamp, E. A. Helmkamp 2007-4-27 11868 El Dorado Foothills, Northern Sierra Nevada Mountains, junction of Ice House Road and White Meadows Road, about 2 miles northwest of US-50 1029 Comment
  UCR14650  Arabis perennans George K. Helmkamp 1975-6-6 s.n. San Bernardino Eastern Mojave Desert, Clark Mountain [area, Mescal Range], Mountain Pass, 0.5 mi south of Interstate 15 1463 Comment
  UCR163127  Arctostaphylos glandulosa subsp. mollis George K. Helmkamp 1993-3-5 s.n. San Luis Obispo Central Coast, just north of Montana de Oro State Park 30 Comment
  UCR197618  Arctostaphylos patula George K. Helmkamp, E. A. Helmkamp 2008-5-15 13435 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 1.2 miles north of its junction with US-50 1817 Comment
  UCD61872  Arctostaphylos viscida subsp. viscida G. K. Helmkamp; Elizabeth Helmkamp 2006-4-13 10186 El Dorado Northern Sierra Nevada Foothills: El Dorado National Forest, along Volcanoville Road, 7.7 mi. N of Wentworth Springs road (NE of Georgetown). 915 Comment
  UCR184381  Arctostaphylos viscida subsp. viscida George K. Helmkamp, E. A. Helmkamp 2007-1-31 11587 El Dorado Foothills, northern Sierra Nevada Mountains, west of Shingle Springs, end of Palmer Drive, 0.5 mi northeast of the junction of Cameron Park Rd and Calif. Hwy 50 402 Comment
  CLARK-A1045-72  Arenaria douglasii George K. Helmkamp 1978-5-20 Riverside San Jacinto Mountains dry slope between meadow and sagebrush, just northwest of Kensworthy Forest Station; Idyllwild 15'Q Comment
  RSA794860  Arenaria kingii subsp. compacta George K. Helmkamp, E. A. Helmkamp 2011-8-19 18126 Alpine Tamarack Road, 0.1 mile east of its junction with Blue Lakes Road 2485 Comment
  CLARK-A1045-821  Arenaria macradenia George K. Helmkamp 1978-5-6 #1 San Bernardino Mesquite Mountains lime kilns; ; Clark Mt. 15'Q Comment
  UCR118284  Arida arizonica George K. Helmkamp, E. A. Helmkamp 1998-4-19 3347 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  RSA615342  Aristida adscensionis George K. Helmkamp, E. A. Helmkamp 1998-2-18 2701 Riverside Colorado Desert: Midland Road, 3.8 miles SE of Midland, Little Maria Mountains Comment
  SBBG83898  Aristida adscensionis G. K. Helmkamp 1986-10-18 San Bernardino Whipple Mtns, along Havasu Palms Rd, ca. 3 mi NW of Black Meadow Landing Rd 396 Comment
  UCR104027  Aristida adscensionis George K. Helmkamp 1998-4-4 3155 Riverside Sonoran (Colorado) Desert, 7.1 miles north of Hwy I-10 on Eagle Mtn Rd, to the vicinity of the pumping station 305 Comment
  UCR92639  Aristida adscensionis George K. Helmkamp 1995-3-16 s.n. Riverside Sonoran (Colorado) Desert, Below Coxcomb Mtns., west of Rice Rd., 10.3 mi. NE of Desert Center 200 Comment
  UCR122371  Armeria maritima subsp. californica George K. Helmkamp, E. A. Helmkamp 2001-7-8 7017 Humboldt North Coast, Samoa Peninsula, 2.6 miles south of CA Hwy 255 bridge across Humboldt Bay 15 Comment
  UCR14374  Arnica chamissonis George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, Owens River, Big Springs 2195 Comment
  UCR245604  Artemisia cana subsp. bolanderi George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22214 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  HSC104159  Artemisia douglasiana G. K. Helmkamp, E. A. Helmkamp 2012-1 19874 Amador Northern Sierra Nevada Mountains; along Hwy. E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  SEINET2441561  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2009-8-4 15357 Alpine Sierra Nevada Mountains: along CA-4 at milepost 30, 1.6 miles south of its junction with CA-89; along East Fork Carson River (Heenan Lake 7.5' Q.). 1787 Comment
  UCR130071  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2001-7-7 6902 Tehama Northern Sierra Nevada Mountains, SE of Mt. Lassen; Calif. Hwy 36/89 at Gurnsey Creek, about 2 mi north of junction with Calif. Hwy 32 1448 Comment
  UCR178636  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2006-9-12 11394 Alpine Northern Sierra Nevada Mountains, west end of Caples Lake at a dam; alongside CA Hwy 88 2335 Comment
  UCR232647  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2011-9-30 18340 Placer Northern Sierra Nevada Mountains Foothills, Diggins Hill Road at the south side of the Bear River Reservoir, 1.1 miles north of Dutch Flat 852 Comment
  UCR67466  Artemisia douglasiana George K. Helmkamp 1990-9-23 G- 9 Lassen north of Ravendale 1677 Comment
  UCR76721  Artemisia douglasiana George K. Helmkamp 1993-7-20 E- 4 Santa Clara San Francisco Bay Region, Above Stevens Creek Reservoir, SE of Cupertino 488 Comment
  HSC79219  Artemisia dracunculus G. K. Helmkamp 1983-10-8 - 6 San Bernardino TNC Big Morongo Preserve, Morongo Valley, near the house in the San Bernardino County-owned area 762 Comment
  SD224823  Artemisia dracunculus G. K. Helmkamp 1997-9-29 2421 Inyo Onion Valley in the Sierra Nevado Mnts W of Independence. 2804 Comment
  UCR141113  Artemisia ludoviciana George K. Helmkamp, E. A. Helmkamp 1998-8-10 4269 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR114371  Artemisia tridentata subsp. vaseyana George K. Helmkamp, E. A. Helmkamp 1997-9-8 2274 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR257743  Artemisia tridentata subsp. vaseyana George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19470 Sierra Northern Sierra Nevada Mountains, Little Truckee River valley along Hwy CA-89, 3.5 road miles north of the Nevada County line, 9.6 air miles SE (136 deg. ) of Sierraville 1878 Comment
  RSA0012140  Asclepias cordifolia George K. Helmkamp, E. Helmkamp 2011-7-7 17641 El Dorado Park Creek Road, 0.4 mile east of its junction with Old Sly Park Road, southeast of Pollock Pines, 0.7 mi. SSW (191 deg ) of Fresh Pond 1250 Comment
  UCR189598  Asclepias cordifolia George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12366 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 13.2 miles ESE of its junction with Sly Park Road at Jenkinson Lake 1976 Comment
  UCR169861  Asclepias eriocarpa George K. Helmkamp 2004-6-12 8631 Santa Barbara Southern outer coast ranges., Along Calif. Hwy 135, 0.9 mi N of San Antonio Rd (S of Orcutt) 152 Comment
  UCD121333  Asclepias fascicularis G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12583 El Dorado Northern Sierra Nevada Mountains: Traverse Creek Road at the crossing of Traverse Creek; about 2 miles southeast of its junction with CA-193. 732 Comment
  UCR230757  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2010-10-1 16994 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 1.1 miles southwest of its junction with Hale Road, 2.5 mi. NW (285 deg. ) of Volcano 692 Comment
  UCR274884  Asclepias fascicularis George K. Helmkamp 1974-7-27 s.n. Inyo Pleasent Valley, Owens River 9 miles NW of Bishop 1313 Comment
  UCR252989  Aster alpigenus var. andersonii George K. Helmkamp, Amy Barnes 2013-9-23 22326 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  RSA0013372  Aster eatonii George K. Helmkamp, E. A. Helmkamp 2010-9-1 16888 Amador Northern Sierra Nevada Mountains: along CA-88, 2.6 miles southwest of its junction with Mormon Emigrant Trail, e. 2.75 mi NNW of Upper Bear River Reservoir. 2162 Comment
  UCR179225  Aster foliaceus George K. Helmkamp, E. A. Helmkamp 2006-9-12 11372 El Dorado Northern Sierra Nevada Mountains, Along Calif. Hwy 89, 1.2 miles west of the Alpine County line. General area of Luther Pass and Grass Lake 2363 Comment
  UCR190209  Aster foliaceus var. parryi George K. Helmkamp, E. A. Helmkamp 2007-9-4 12890 Amador Northern Sierra Nevada Mountains, along CA-88 at Mile-49, 3.1 miles east of Hams Station 1860 Comment
  UCR257730  Aster foliaceus var. parryi George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19520 Placer Northern Sierra Nevada Mountains, Sugar Bowl Road, 0.4 mile south of its junction with Donner Pass Road, just west of Lake Mary 2136 Comment
  RSA747378  Aster integrifolius George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13911 El Dorado Northern Sierra Nevada Mountains: Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50. 2043 Comment
  UCR176025  Aster occidentalis George K. Helmkamp, E. A. Helmkamp 2006-7-28 11034 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  UCR238598  Aster occidentalis George K. Helmkamp, E. A. Helmkamp 2010-8-26 16850 Nevada Northern Sierra Nevada Mountains, Donner Pass Road, 0.8 mile west of its junction with Hwy. I-80, 0.65 mi. NE (62 deg. ) of Kingvale 1921 Comment
  RSA0035726  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-14 22235 Alpine Silver Creek, along CA-4, 5.0 miles west of its junction with CA-89 1927 Comment
  RSA714090  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2005-10-1 9983 Placer Northern Sierra Nevada Mts.: NW of Lake Tahoe; Junction of Bear Creek Road and Big John Drive (ca. 2.2 miles west of CA Highway 89 and just south of Alpine Meadows Road) 2015 Comment
  UCR115841  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2000-7-18 5883 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  UCR176466  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2006-7-31 11073 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy US-50 1864 Comment
  UCR242838  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2010-9-1 16896 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  UCR257647  Aster occidentalis var. occidentalis George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19494 Sierra Northern Sierra Nevada Mountains, Stampede Dam Road, 1.7 miles north of the Nevada County line, just east of Stampede Reservoir 1770 Comment
  UCR258989  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-9-16 23073 Alpine Eastern Sierra Nevada Mountains, Paynesville, junction of Chambers Lane and Diamond Valley Road along West Fork Carson River 1593 Comment
  UCR233002  Aster oregonensis George K. Helmkamp, E. A. Helmkamp 2011-9-24 18330 El Dorado Northern Sierra Nevada Mountains, Loon Lake Road at the junction to the campground at the south end of the lake 1973 Comment
  CLARK-A1045-1327  Aster spinosus George K. Helmkamp 1977-10-9 San Diego Imperial Beach along 19th Street; weed in farmland; Imperial Beach 7.5'Q Comment
  SD237418  Astragalus bolanderi G. K. Helmkamp, E. A. Helmkamp 2010-7-23 16615 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42, 0.2 mile west of its junction with Wright's Lake Road and beside Silver Creek, 4 miles NE (31a^z) of Kyburz. 2021 Comment
  SEINET3860251  Astragalus bolanderi George K. Helmkamp, E. A. Helmkamp 2010-7-23 16615 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42, 0.2 mile west of its junction with Wright's Lake Road and beside Silver Creek, 4 miles NE of Kyburz.; 0 2021 Comment
  UCD104657  Astragalus bolanderi G. K. Helmkamp; E. A. Helmkamp 2007-9-11 12924 El Dorado Northern Sierra Nevada Mountains: Along Hwy. US-50, 0.4 mile southwest of Phillips. 1829 Comment
  RSA614979  Astragalus didymocarpus George K. Helmkamp, E. A. Helmkamp 1998-4-8 3229 San Luis Obispo Elkhorn Grade Rd, 13.7 mi. NW of jct with CA hwy 33 (roughly WNW of Maricopa). 579 Comment
  UCR130246  Astragalus didymocarpus George K. Helmkamp, E. A. Helmkamp 2001-4-27 6501 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  UCR121469  Astragalus douglasii George K. Helmkamp, E. A. Helmkamp 1999-6-29 5048 Nevada Northern Sierra Nevada Range, Prosser Creek at Hobart Mills, c. 50-100 yards east of Calif. Hwy 89, NE of Lake Tahoe 1707 Comment
  UCR160966  Astragalus douglasii George K. Helmkamp, E. A. Helmkamp 2005-6-12 9656 San Luis Obispo Central Coast Range, along Calif. Hwy 58 (Carrizo Hwy), 22.2 miles east of Santa Margarita; near Camatta Creek 552 Comment
  UCR100787  Astragalus lentiginosus var. nigricalycis George K. Helmkamp, E. A. Helmkamp 1998-4-7 3187 Kern 3 mi. north of Maricopa on Calif. Hwy 33 252 Comment
  SD224950  Astragalus lentiginosus var. variabilis G. K. Helmkamp 1998-4-4 3106 San Bernardino Mojave Desert: S edge of Cadiz Dry Lake, 13.1 mi. N of mile-marker 76 on CA hwy 62 (Twentynine Palms Hwy), E of Twentynine Palms. 182 Comment
  UCR15568  Astragalus malacus George K. Helmkamp 1978-5-30 s.n. Mono Eastern Sierra Nevada Mtns., c. 2 mi north of Conway Summit of Hwy US-395 2134 Comment
  UCR158593  Astragalus nuttallii var. nuttallii George K. Helmkamp, E. A. Helmkamp 2004-6-20 8686 Santa Barbara South central coast, Surf. Southern Pacific RR parking lot NW of Lompoc 12 Comment
  SD224954  Astragalus tricarinatus G. K. Helmkamp 1998-4-3 3087 Riverside Coachella Valley: Mission Creek, the Wildlands Conservancy Preserve, 1.1 mi. NW of the ranch house beside a gauging station along the creek. 747 Comment
  RSA628858  Astragalus trichopodus var. lonchus George K. Helmkamp, E. A. Helmkamp 1999-2-26 4629 San Diego Chula Vista: City Preserve W of E Street on the grounds of the old munitions manufacturing area. 6 Comment
  UCR134417  Astragalus trichopodus var. phoxus George K. Helmkamp, E. A. Helmkamp 2001-4-29 6577 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  UCR219635  Athyrium filix-femina var. cyclosorum George K. Helmkamp, E. A. Helmkamp 2009-10-22 15700 El Dorado Sierra Nevada Mountains Foothills, Pollock Pines, Blair Road just south of its junction with Forebay Road 1125 Comment
  UCR92484  Atrichoseris platyphylla George K. Helmkamp 1995-3-16 s.n. Riverside Sonoran (Colorado) Desert, Below Coxcomb Mtns., west of Rice Rd., 10.3 mi. NE of Desert Center 200 Comment
  UCR100867  Atriplex polycarpa George K. Helmkamp, E. A. Helmkamp 1998-2-18 2707 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  UCR161246  Atriplex semibaccata George K. Helmkamp, E. A. Helmkamp 2004-11-18 8867 Santa Barbara South Central Coast, Ocean Beach Park along Ocean Ave (Calif. highway 246), NW of Lompoc and just south of Surf railroad station 11 Comment
  UCR230747  Atriplex subspicata George K. Helmkamp, E. A. Helmkamp 2010-10-20 17035 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR131921  Atriplex triangularis George K. Helmkamp 2003-9-8 8128 San Luis Obispo Central Coast, Saltwater ocean inlet 0.2 mile SW of Oceano Airport 6 Comment
  UCR59470  Atriplex triangularis George K. Helmkamp 1989-8-6 s.n. San Luis Obispo Central Coast, Baywood Park, at the south edge of Morro Bay 3 Comment
  SEINET3821625 Image available Avena fatua George K. Helmkamp, E. A. Helmkamp 2010-3-26 15773 Amador Eastern San Joaquin Valley/ Sierra Nevada Foothills, low foothills along CA-16, 6.8 miles west of Plymouth near Forest Home Rd. (Irish Hill 7.5' Q) 177 Comment
  UCR95910  Baccharis glutinosa George K. Helmkamp 1996-9-22 1216 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  UCR201551  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14260 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UCR121594  Baccharis salicifolia George K. Helmkamp, E. A. Helmkamp 2002-4-22 7433 San Benito San Andreas rift zone., Bitterwater Valley along Calif. Hwy 25, 17.6 mi north of Calif. Hwy 198 518 Comment
  UCR101616  Baileya pauciradiata George K. Helmkamp, E. A. Helmkamp 1998-2-26 2766 San Bernardino Mojave Desert, East Cronese Dry Lake. 0.2 mi south of I-15 on Basin Rd. 332 Comment
  UCR120519  Baileya pleniradiata George K. Helmkamp, E. A. Helmkamp 2001-3-17 6276 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR201752  Bassia hyssopifolia George K. Helmkamp, E. A. Helmkamp 2008-8-8 13979 Alpine Northern Sierra Nevada Mountains, along CA-89 at Grass Lake, 0.9 mile west of Luther Pass 2354 Comment
  SD143951  Beta vulgaris G. Helmkamp 1997-2-1 1298 Imperial Southwest of Niland, along Sinclair Road and just east of Hatfield Road. Common in mud beside irrigation ditch. (IPB 10/07) -54 Comment
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Feb 20 2010
  SEINET3246130  Bidens frondosa G. K. Helmkamp, E. A. Helmkamp 2009-1 15605 El Dorado Sierra Nevada Mountains Foothills: Lake Oaks Mobile Home Park, Diamond Springs; 0.2 mile south of the junction of Patterson Drive and CA-49/Pleasant Valley Road. Comment
  UCSB70080  Bidens frondosa Helmkamp, G.; Helmkamp, E. 2007-9-14 Placer Foothills, northern Sierra Nevada Mountains: along Mosquito Ridge Road 0.4 mile east of Foresthill 942 Comment
  UCD98827  Bistorta bistortoides G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10896 El Dorado Northern Sierra Nevada Mtns. Wright's Lake Road, 6.1 miles north of Hwy US-50; at the junction with the road from Ice House Reservoir. 2029 Comment
  SBBG129053  Boechera rectissima G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20870 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  UCR59817  Bouteloua barbata George K. Helmkamp 1989-9-17 s.n. Imperial Sonoran (Colorado) Desert, Colorado River Valley; 0.5 mi west of Palo Verde at 4th Street 72 Comment
  SBBG129069  Boykinia occidentalis G. K. Helmkamp, E. A. Helmkamp 2013-6-5 20763 Sierra CA-49, 1.2 mi N of the Yuba County line 901 Comment
  SEINET3245625  Brassica geniculata G. K. Helmkamp, E. A. Helmkamp 2009-1 15663 El Dorado Sierra Nevada Mountains Foothills; Cedar Ravine Road at the junction with Camp Nauvoo Road, 0.1 mile south of Weber Creek and c. 2.4 mi. SE of Placerville (Placerville 7.5') 567 Comment
  UCR188527  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2007-9-24 13008 Calaveras Northern foothills, Sierra Nevada Mountains, in Rich Gulch along Gwin Mine Road, 1.2 miles north of Paloma 329 Comment
  UCR232657  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2011-10-8 18379 Glenn Northern Sacramento Valley, along CA-45, 1.2 miles north of Princeton; Sacramento River side of the levee between the highway and Packer Island 29 Comment
  UCR235304  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2011-11-19 18463 Sacramento Eastern Sacramento Valley, Scott Road, 5.9 miles south of its junction with Placerville Road, along Deer Creek, N of Rancho Murieta 53 Comment
  UCR169230  Brassica kaber George K. Helmkamp, E. A. Helmkamp 2005-2-14 8907 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive 122 Comment
  UCR253477  Brassica kaber George K. Helmkamp 2014-4-5 22690 Amador Eastern edge of San Joaquin Valley/lower Sierra Nevada Foothills, Sutter Creek along West Marlette Street, 0.1 mile east of Dave Brubeck Road, west end of city of Ione 85 Comment
  UCR158584  Brassica nigra George K. Helmkamp, E. A. Helmkamp 2004-6-20 8672 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR160921  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2005-6-5 9534 San Luis Obispo Central Coast, San Simeon Creek, 0.1 mile east of Calif. Hwy 1 9 Comment
  UCR237463  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2012-2-23 18569 Sutter Sacramento Valley, east end of Kirkville Road at the west edge of Sutter Bypass Causeway 15 Comment
  UCR238400  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2012-4-7 18729 San Joaquin San Joaquin Valley, along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden 52 Comment
  UCR257587  Brassica rapa George K. Helmkamp, Elizabeth Helmkamp 2014-2-20 22522 Amador Sierra Nevada Mountains Foothills, 2.2 air miles SE (126 deg. ) of Ione, along CA-88, 0.5 mile northeast of its junction with CA-104 172 Comment
  UCR101127  Brassica tournefortii George K. Helmkamp, E. A. Helmkamp 1998-2-26 2760 San Bernardino Mojave Desert, East Cronese Dry Lake. 0.2 mi south of I-15 on Basin Rd. 332 Comment
  UCR240256  Brassica tournefortii George K. Helmkamp 2004-2-11 8272 B San Luis Obispo Central Coast, Nipomo Mesa, Pomeroy Rd, 0.2 mi north of Willow Rd. 130 Comment
  UCR133220  Brickellia californica George K. Helmkamp 1993-9-22 34- 05 San Bernardino San Bernardino Mtns., 6.7 mi. up Burns Canyon from junction of Pioneertown and Pipes Canyon Roads 1529 Comment
  UCR136208  Brickellia californica George K. Helmkamp, E. A. Helmkamp 1999-9-30 5299 San Bernardino San Bernardino Mountains, 5.7 miles up Burns Cyn Rd from Rimrock Rd., NW of Pioneertown 1768 Comment
  UCR242012  Brickellia californica George K. Helmkamp, E. A. Helmkamp 2012-9-17 19853 El Dorado Northern Sierra Nevada Mountains Foothills, along Forebay Road, 6.9 miles north of its junction with Pony Express Road in Pollock Pines 726 Comment
  CAS-BOT-BC106198  Brickellia desertorum G. Helmkamp 1993-9-12 22 -3 San Bernardino Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  SEINET3440065 Image available Briza minor George K. Helmkamp, E. A. Helmkamp 2011-5-6 17187 Yuba East edge of Sacramento Valley: Camp Far West Road, 0.3 mi N of the junction with Hokan lane, vicinity of Camp Far West Reservoir 105 Comment
  UCR118282  Briza minor George K. Helmkamp, E. A. Helmkamp 2000-4-24 5531 Monterey South Coast Range, west end Salinas Valley; Nacimiento-Fergusson Rd., 1.5 miles west of Mission Rd. just south of Mission San Antonio 320 Comment
  UCR173281  Briza minor George K. Helmkamp, Elizabeth Helmkamp 2006-5-19 10480 El Dorado Northern Sierra Nevada Foothills, Lake Oaks mobile home park; corner of Pleasant Valley Road and Patterson Drive., Diamond Springs. 537 Comment
  UCR123514  Brodiaea coronaria subsp. coronaria George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6859 Plumas Sierra Nevada Mountains, Calif. Hwy 89, 2.3 miles SSE of its junction with Calif. Hwy 36, Lake Almanor Region 1357 Comment
  SEINET8466112 Image available Brodiaea elegans G. K. Helmkamp, EA. Helmkamp 2009-6-25 15038 El Dorado Sierra Nevada Mountains Foothills: Forbay Road above South Fork American River, 6.4 miles north of Pony Express Trail in Pollock Pines 613 Comment
  UCR206363  Brodiaea elegans George K. Helmkamp, E. A. Helmkamp 2009-5-20 14747 Colusa Inner North Coast Ranges, along CA-16 at 'Cowboy Camp' 1.0 mile south of the junction with CA-20, adjacent to Bear Creek 332 Comment
  UCR206863  Brodiaea elegans subsp. elegans George K. Helmkamp, E. A. Helmkamp 2009-6-25 15038 El Dorado Sierra Nevada Mountains Foothills, Forbay Road above South Fork American River, 6.4 miles north of Pony Express Trail in Pollock Pines 613 Comment
  SD237254  Brodiaea minor G. K. Helmkamp, E. A. Helmkamp 2010-6-19 16314 El Dorado Sierra Nevada Mountains Foothills: Slug Gulch Road, 4.7 miles from its junction with Perry Creek Road. 1082 Comment
  UCR173587  Bromus carinatus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10389 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR201754  Bromus carinatus George K. Helmkamp, E. A. Helmkamp 2008-8-8 13983 B Alpine Northern Sierra Nevada Mountains, along CA-89 at Grass Lake, 0.9 mile west of Luther Pass 2354 Comment
  UCR251280  Bromus carinatus George K. Helmkamp, E. A. Helmkamp 2012-7-6 19326 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 0.2 mile north of Ice House community, 10.7 miles north of US-50 1683 Comment
  UCR240890  Bromus carinatus var. carinatus George K. Helmkamp, E. A. Helmkamp 2012-6-6 19121 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.1 miles west of Cooks Station 1439 Comment
  UCR248391  Bromus carinatus var. carinatus George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21010 Amador Northern Sierra Nevada Mountains, Plasse Road toward Silver Lake, 0.3 mile south of CA-88/Carson Pass Hwy 2276 Comment
  UCR237382  Bromus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-13 19166 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  UCD60366  Bromus diandrus G. K. Helmkamp; E. A. Helmkamp 2007-3-14 11631 Sacramento Sacramento Valley near the edge of Sierra Nevada Mountains foothills. Latrobe Rd. about 5.7 miles west of Latrobe and 1.5 miles W of El Dorado Co. line. 110 Comment
  UCR140105  Bromus diandrus George K. Helmkamp 2004-2-6 8254 San Luis Obispo Central Coast, Riverside Road at the low end of Nipomo Mesa beside Division Road 46 Comment
  UCR237586  Bromus diandrus George K. Helmkamp, E. A. Helmkamp 2012-3-9 18606 Yolo Sacramento Valley, East Main Street (Co. Rd. 22), Woodland (parallel to I-5), 1.7 mile west of the Sacramento River 7 Comment
  SD255609  Bromus hordeaceus George K. Helmkamp, Amy Barnes 2014-3-21 22641 Placer Sacramento Valley: Sherican, Riosa Road at the west side of its junction with old CA-65 (Sheridan 7.5'Q) 32 Comment
  SEINET13203114 Image available Bromus hordeaceus George K. Helmkamp 2014-1 22746 Nevada Northern Sierra Nevada Mountains Foothills: along CA-120, 2.3 miles west of its junction with CA-49 in Grass Valley (Grass Valley 7.5' Q.) 728 Comment
  UCR184851  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-4-26 11818 Amador Foothills, northern Sierra Nevada Mountains, along Calif. E-16, 0.7 mile south of River Pines 610 Comment
  UCR185340  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-4-20 11777 El Dorado Foothills, Northern Sierra Nevada Mountains, along Green Valley Road at junction of Jet Quartz Creek Rd., between Four Corners and Gold Hill 410 Comment
  UCR187304  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-4-5 11748 Amador Foothills, Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City 309 Comment
  UCR188176  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-4-30 11890 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR230632  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2011-5-6 17201 Yuba East edge of Sacramento Valley, Spenceville Road, 4.2 miles northwest of Wheatland 55 Comment
  UCR233136B  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2010-3-26 15766 Amador Eastern San Joaquin Valley/ Sierra Nevada Foothills, low foothills along CA-16, 6.8 miles west of Plymouth near Forest Home Rd. 177 Comment
  UCR241376  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2012-3-22 18635 Amador Northern Sierra Nevada Mountains Foothills, Bell Road, 1.2 miles east of CA-49 at private road to Rancho Cicada Retreat 371 Comment
  UCR253641  Bromus hordeaceus George K. Helmkamp 2014-3-18 22580 San Joaquin San Joaquin Valley, along Hwy CA-88 on the southwest side of the border with Calaveras County, 7.1 mi. SW (220 deg. ) of Ione 87 Comment
  SEINET3817934 Image available Bromus laevipes George K. Helmkamp, E. A. Helmkamp 2012-5-5 18910 Placer Northern Sierra Nevada Foothills, Lake Clementine Road, 1.2 miles west of its junction with Foresthill Road, 0.3 air mi SE (123degrees) of Clementine Dam on the American River (Auburn 7.5' Q. 396 Comment
  UCR141007  Bromus rubens George K. Helmkamp 2004-3-4 8324 San Luis Obispo Central Coast, Nipomo Mesa, along Pomeroy Rd, 0.2 mi N of Willow Rd, NW of Nipomo 91 Comment
  UCR37507  Bromus rubens George K. Helmkamp 1984-4-20 840420- 28 San Bernardino Little San Bernardino Mountains, Big Morongo Preserve of The Nature Conservancy, south of the town of Morongo Valley in Big Morongo Canyon 765 Comment
  UCR256982  Bromus sterilis George K. Helmkamp 2014-5-17 22896 Calaveras Sierra Nevada Mountains Foothills, between Sandy Gulch and Glencoe along CA-26, 0.1 mile north of the bridge over South Fork Mokelumne River 608 Comment
  UCD72498  Bromus suksdorfii G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12735 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 1.4 miles south of the lake. 2101 Comment
  UCR129555  Bromus suksdorfii George K. Helmkamp, E. A. Helmkamp 2001-7-8 6819 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCR88283  Bromus suksdorfii George K. Helmkamp 1995-9-21 1- 21 Mono Sierra Nevada Mtns., south edge of Lake Mary, south of Lake Mary, Mammoth Lakes 2805 Comment
  UCR95915  Cakile maritima George K. Helmkamp 1996-9-22 1202 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  UCR103832  Calamagrostis canadensis George K. Helmkamp, E. A. Helmkamp 1997-9-11 2367 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  UCR89432  Calamagrostis stricta subsp. inexpansa George K. Helmkamp 1990-8-2 s.n. Mono Sierra Nevada Mtns, between Mammoth and Lake Mary 2591 Comment
  SD212703  Calandrinia ciliata G. K. Helmkamp, Elizabeth Helmkamp 2006-3-26 10104 El Dorado East-Northeast of Sacramento; Rock Creek Road, 0.9 mile East of CA Highway 193 395 Comment
  UCR140109  Calandrinia ciliata George K. Helmkamp 2004-2-7 8258 San Luis Obispo Central Coast, SE of Oceano along Halcyon Rd., just east of Mesa View Dr. 76 Comment
  UCR232274  Calocedrus decurrens George K. Helmkamp, E. A. Helmkamp 2011-9-30 18360 Nevada Northern Sierra Nevada Mountains, small, open flat along CA-20, 2.6 miles west of its junction with Lowell Hill Road 1581 Comment
  UCR245712  Calocedrus decurrens George K. Helmkamp, Amy Barnes 2013-9-24 22351 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCR194974  Calochortus albus George K. Helmkamp, E. A. Helmkamp 2007-5-18 11998 Placer Northern Sierra Nevada Mountains Foothills, Forest Hill Road, 4.3 miles northeast of the bridge over the junction of North and West Forks of the American River 485 Comment
  UCR140481  Calochortus catalinae George K. Helmkamp 2004-4-23 8540 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd 0.8 mi E. of Midland School, c. 7 mi NE of Los Olivos 396 Comment
  SEINET11262287  Calochortus clavatus var. avius George Helmkamp, E. A. Helmkamp 2011-7-30 17951 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road, 7.4 miles southeast of Omo Ranch, 1.9 miles NW airline of Hwy 88 junction (Caldor 7.5).; 0 1372 Comment
  SD239510  Calochortus minimus G. K. Helmkamp, E. A. Helmkamp 2009-7-2 15091 El Dorado Sierra Nevada Mountains: Wright's Road at Chimney Flat, 3.4 miles north of junctcion with US-50 (Pyramid Peak 7.5'Q) 2037 Comment
  UCR173732  Calochortus minimus George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10701 El Dorado Northern Sierra Nevada Mountains, Ice House Road at the turnoff to Loon Lake 1982 Comment
  UCR193106  Calochortus minimus George K. Helmkamp, E. A. Helmkamp 2007-6-12 12338 Nevada Northern Sierra Nevada Mountains, Spaulding Lake Road, 0.3 mile north of its junction with Hwy CA-20 1604 Comment
  SEINET11261807  Calochortus monophyllus George K. Helmkamp, E. A. Helmkamp 2012-4-30 18883 El Dorado Northern Sierra Nevada Mountains Foothills: Mosquito Road, 2.4 miles N of the bridge over the South Fork American River.; 0 694 Comment
  UCR230086  Calochortus monophyllus George K. Helmkamp, E. A. Helmkamp 2011-6-7 17485 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCR129959  Calochortus splendens George K. Helmkamp, E. A. Helmkamp 2000-4-24 5543 Monterey Outer south coast ranges., Nacimiento Road, 10.4 mi west of Mission Road, just south of Mission San Antonio 457 Comment
  UCR194879  Calochortus superbus George K. Helmkamp, E. A. Helmkamp 2007-5-26 12109 Nevada Northern Sierra Nevada Mountains Foothills, Tyler Foote Crossing Road, 1.0 mile northeast of CA-49 622 Comment
  UCR197582  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 2008-5-29 13534 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road parallel to CA-4 and 0.4 mile from the road junction; at the Utica Creek crossing 759 Comment
  RSA799174  Calycadenia truncata George K. Helmkamp, E. A. Helmkamp 2010-9-23 16950 El Dorado Northern Sierra Nevada Mtns: Peavine Ridge Road, 2.8 mi west of Ice House Road and at the junction with Forest Route 31 and Round Tent Canyon Road. 1581 Comment
  CLARK-A1045-1217  Calycanthus occidentalis George K. Helmkamp 1977-8-3 Mariposa Yosemite National Park at the diversion dam; rocky river bank; ; El Capitan 7.5'Q 1158 Comment
  UCR193105  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2007-6-12 12337 Nevada Northern Sierra Nevada Mountains, Spaulding Lake Road, 0.3 mile north of its junction with Hwy CA-20 1604 Comment
  CLARK-A1045-453  Calyptridium pygmaeum George K. Helmkamp 1979-6-22 San Bernardino San Bernardino Mountains on Forest Service road 3N04, 0.75 mile north of road 3N08; sagebrush/yellow pine area; ; Big Bear City 7.5' Q 2285 Comment
  UCR102613  Calyptridium umbellatum George K. Helmkamp, E. A. Helmkamp 1997-9-12 2412 Mono Eastern Sierra Nevada/Mono Basin, Big Sand Flat along Calif. Hwy 120 at Pilot Spring Rd., SE of Mono Lake 2125 Comment
  SD224929  Calystegia longipes G. K. Helmkamp 1997-9-30 2500 Inyo Sierra Nevada Mountains; Lone Pine Crk. 2286 Comment
  UCR194948  Calystegia occidentalis subsp. occidentalis George K. Helmkamp, E. A. Helmkamp 2007-5-18 12003 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 2.8 miles southeast of Foresthill 814 Comment
  UCR132151  Camissonia boothii subsp. boothii George K. Helmkamp, E. A. Helmkamp 1993-7-28 186 Mono Sierra Nevada Mountains, Long Valley mesa at the junction of Owens River Road and Lake Crowley 2104 Comment
  UCR122775  Camissonia boothii subsp. condensata George K. Helmkamp, E. A. Helmkamp 1998-3-16 2857 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  UCR122820  Camissonia brevipes subsp. brevipes George K. Helmkamp, E. A. Helmkamp 2001-3-31 6353 San Bernardino Eastern Mojave Desert, NE side of junction of US-95 and I-40 366 Comment
  VVC954  Camissonia brevipes subsp. brevipes G. K. Helmkamp 1998-4-9 3306 San Bernardino Mojave Desert, NW of Barstow; 2.2 mi. NE of CA Hwy 58 on unnamed dirt road 2.8 mi. W of Waterman Rd 701 Comment
  RSA615143  Camissonia campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 1998-4-8 3231 San Luis Obispo Soda Lake Road, 6.6 miles NW of junction with CA highway 33 (roughly W of Maricopa) 671 Comment
  CLARK-A1045-1281  Camissonia cardiophylla George K. Helmkamp 1978-3-17 San Diego Anza-Borrego Desert State Park Canon sin Nombre [No-name Canyon]; sandy wash; Sweeney Pass 7.5'Q Comment
  UCR104013  Camissonia claviformis George K. Helmkamp 1998-4-4 3136 Riverside Sonoran (Colorado) Desert, junction of Calif. Hwy 62 (Twentynine Palms Hwy) & Calif. Hwy 177 (Desert Center-Rice Rd) 457 Comment
  UCR101495  Camissonia claviformis subsp. aurantiaca George K. Helmkamp, E. A. Helmkamp 1998-2-26 2796 San Bernardino Mojave Desert, NW side of Salt Spring Hills about 28 mi north of Baker; between the hills and Calif. Hwy 127 201 Comment
  UCR101662  Camissonia claviformis subsp. aurantiaca George K. Helmkamp, E. A. Helmkamp 1998-2-26 2800 San Bernardino Eastern Mojave Desert, Saltbush scrub flat east of Soda Lake and 5.9 mi SSE of Baker on a farm road leading to Little Cowhole Mtn. 299 Comment
  UCR101660  Camissonia claviformis subsp. claviformis George K. Helmkamp, E. A. Helmkamp 1998-2-26 2769 San Bernardino Mojave Desert, Silurian Dry Lake along Calif. Hwy 127, 19.0 mi north of Baker. 207 Comment
  UCR103343  Camissonia claviformis subsp. yumae George K. Helmkamp, E. Helmkamp 1998-1-24 2592 Imperial Sonoran (Colorado) Desert, Gravel Rd south of Hwy I-8. Rocky hills at W edge of Fort Yuma Indian Reservation. 61 Comment
  UCR121707  Camissonia kernensis subsp. gilmanii George K. Helmkamp, E. A. Helmkamp 2001-4-26 6473 Kern Tehachapi Mtns, Oak Creek Rd., 8.9 miles west of Mojave 1189 Comment
  UCR102931  Camissonia pallida George K. Helmkamp 1998-4-3 3064 Riverside Sonoran (Colorado) Desert, Whitewater River, bordering the north side of Hwy I-10; E side of the river 396 Comment
  SD193318  Camissonia strigulosa G. K. Helmkamp, E. A. Helmkamp 2005-4-17 9365 San Luis Obispo Corbett Canyon, 2.3 miles north of Highway CA 227 in Arroyo Grande. 81 Comment
  RSA0036000  Campanula prenanthoides George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-25 22032 El Dorado Wentworth Springs Road, 2.1 miles east of Stumpy Meadows Lake, 15.6 km NNE (06 ) of Pollock Pines 1357 Comment
  RSA725938  Campanula prenanthoides George K. Helmkamp, E. A. Helmkamp 2006-8-24 11289 El Dorado Ice House Road, 3.8 miles north of Wentworth Springs Road 1616 Comment
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Jul 26 2017
  UCR230068  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2011-5-19 17309 Amador Eastern edge San Joaquin Valley at start of Sierra Nevada foothills, Pardee Dam Road, 0.2 mile south of Stony Creek Road, 5 miles SE (124 deg. ) of Ione 201 Comment
  SBBG128824  Capsella bursa-pastoris G. K. Helmkamp, E. A. Helmkamp 2012-2-3 18524 San Joaquin Escalon-Bellota Rd, 0.2 mi S of its jct with CA-26, NE of Linden 39 Comment
  UCD114517  Cardamine hirsuta G. K. Helmkamp; E. A. Helmkamp 2007-3-10 11603 El Dorado Northern Sierra Nevada Mountains; Rattlesnake Bar Road, 3 miles southwest of CA-49, SW of Pilot Hill. 390 Comment
  UCR184369  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2007-2-24 11589 El Dorado Foothills, Northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Pleasant Valley Road and Patterson Dr., east end of Diamond Springs 537 Comment
  UCR230634  Carduus pycnocephalus George K. Helmkamp, E. A. Helmkamp 2011-5-10 17241 Amador Northern Sierra Nevada Mountains Foothills, along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg. ) of town of Sutter Creek 412 Comment
  UCD140989  Carex G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12067 Placer Northern Sierra Nevada Mountains: Sugar Pine Road, 0.2 mile northwest of Forest Hill Road. 1360 Comment
  UCR195710  Carex George K. Helmkamp, E. A. Helmkamp 2007-5-26 12106 Nevada Northern Sierra Nevada Mountains Foothills, Tyler Foote Crossing Road, 1.7 miles northeast of CA-49 617 Comment
  UCR196931  Carex George K. Helmkamp 2008-6-17 13693 Amador Northern Sierra Nevada Mountains, Bear River Reservoir Road on the branch leading to Cole Creek, 2.7 miles east of Bear River Reservoir dam 1814 Comment
  UCR114239  Carex abrupta George K. Helmkamp, E. A. Helmkamp 1997-9-9 2293 Alpine Sierra Nevada Mtns., Ebbetts Pass along Calif. Hwy [4] 2652 Comment
  UCR122661  Carex alma George K. Helmkamp, E. A. Helmkamp 2002-4-23 7509 Madera Western Sierra Nevada foothills, Bass Lake Road, 2.2 miles southeast of the junction with CA Hwy 41 976 Comment
  UCR188513  Carex angustior George K. Helmkamp, E. A. Helmkamp 2007-7-17 12540 Alpine Northern Sierra Nevada Mountains, Blue Lake road, 11.5 miles south of its junction with CA-88, c. 0.5 mi. due east of Lower Blue Lake 2463 Comment
  UCR82261  Carex athrostachya George K. Helmkamp 1994-7-28 103- 5 Mono Eastern Sierra Nevada Mtns., Long Valley, Crowley Lake Road at Whiskey Creek, 3 miles east of Tom's Place 2119 Comment
  UCR174203  Carex deweyana subsp. leptopoda George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10587 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road just north of Hwy US-50 1665 Comment
  UCR241315  Carex feta George K. Helmkamp, E. A. Helmkamp 2012-9-20 19880 Amador Northern Sierra Nevada Mountains Foothills, along Hwy E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  UCR194688  Carex heteroneura var. heteroneura George K. Helmkamp, E. A. Helmkamp 2007-5-31 12213 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.3 miles north of US-50 at Wrights Lake junction east of Kyburz 2043 Comment
  UCR91938  Carex heteroneura var. heteroneura George K. Helmkamp 1996-6-11 1145 San Bernardino San Bernardino Mtns., 1.2 miles SW of Tulip Lane, city of Big Bear Lake 2143 Comment
  SD144145  Carex hoodii G. Helmkamp, E. Helmkamp 1997-9-10 2339 Mono Inyo National Forest at Pilot Spring about 5 miles southeast of highway CA-120 (southeast of Mono Lake and north of Mono Craters); yellow pine forest with a small damp area from the spring. 2301 Comment
  UCR257673  Carex hoodii George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19692 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, at the west side of Carson Spur, 1.7 air mi west (278 deg. ) of Kirkwood 2436 Comment
  UCR249151  Carex infirminervia George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20752 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  UCR172671B  Carex integra George K. Helmkamp, Elizabeth Helmkamp 2006-4-11 10177 El Dorado Northern Sierra Nevada Foothills, E of Sacramento; Along Mother Load Road, 0.3 mi N of Pleasant Valley Road (just west of El Dorado) 476 Comment
  UCR121466  Carex leporinella George K. Helmkamp, E. A. Helmkamp 1999-6-30 5080 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  RSA0025301  Carex multicostata George K. Helmkamp, E. A. Helmkamp 2009-8-4 15379 Alpine Sierra Nevada Mtns: along CA-4 at Mile-21, 21.6 mi southwest of its junction with CA-89. 2402 Comment
  UCR176211  Carex multicostata George K. Helmkamp, E. A. Helmkamp 2006-7-7 10854 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  UCR237092  Carex nebrascensis George K. Helmkamp, E. A. Helmkamp 2012-7-14 19423 Amador Northern Sierra Nevada Mountains, Tragedy Spring, near Carson Pass Hwy, along Tragedy Spring Road 0.3 mile east of its junction with CA-88 2421 Comment
  UCR67025  Carex pansa George K. Helmkamp 1990-9-3 s.n. San Luis Obispo Central Coast, Los Osos, north of Buckskin and Martingale 46 Comment
  UCR120496  Carex pellita George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-30 5062 Placer Northern Sierra Nevada Range, Truckee River, c. 4 mi upstream from Lake Tahoe; 1.1 mi south of Squaw Valley Road 1860 Comment
  SD132501  Carex schottii G. Helmkamp 1990-9-3 San Luis Obispo South end of Morro Bay; southwest of Baywood Park; coastal strand. 14 Comment
  RSA713331  Carex senta George K. Helmkamp 1996-6-11 1128 San Bernardino San Bernardino Mtns, along SN11 southwest of City of Big Bear Lake. 0.5 mile west of Mill Creek Road. 2256 Comment
  UCR175483  Carex specifica George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10692 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 10.6 miles south of Wentworth Springs Road (just south of the Jones Fork of Silver Creek) 1509 Comment
  UCR245593  Carex specifica George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22206 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  SEINET3908427  Carex subfusca George K. Helmkamp, E. A. Helmkamp 2008-6-9 13631 Amador Northern Sierra Nevada Mountains: Panther Creek Road, 0.1 mile south of its junction with CA-88, Jct. is 4.0 miles east of Cook's Station (Peddler Hill 7.5' Q.).; 0 1000 Comment
  UCR160569  Castilleja affinis subsp. affinis George K. Helmkamp, E. A. Helmkamp 2005-6-9 9597 San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 8.3 miles northeast of Huasna Townsite Road 332 Comment
  RSA567418  Castilleja angustifolia George K. Helmkamp 1993-4-24 s.n. San Bernardino 5 miles north of Kelso, crossing Kelbaker Road 915 Comment
  UCR219184  Castilleja applegatei George K. Helmkamp, E. A. Helmkamp 2010-6-23 16366 Amador Sierra Nevada Mountains Foothills, Rams Horn Grade, 1.8 rd. miles northeast of Volcano at the junction with Sutter Creek Road 730 Comment
  UCD122250  Castilleja applegatei subsp. pinetorum G. K. Helmkamp; E. A. Helmkamp 2006-7-7 10848 El Dorado Northern Sierra Nevada Mtns.: Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz. 2049 Comment
  UCR187299  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2007-4-5 11742 Amador Foothills, Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City 309 Comment
  UCR237299  Castilleja attenuata George K. Helmkamp, E. A. Helmkamp 2012-4-14 18750 Butte Northwestern Sacramento Valley, Cox Lane, 1.3 miles west of its intersection with La Loma Way, c. 10.3 mi. ENE (82 deg. ) of Gridley 91 Comment
  UCR15497  Castilleja brevilobata George K. Helmkamp 1978-7-16 s.n. Mendocino North Coast, where [Hwy 208] first meets the ocean west of Leggett at US Hwy 1 49 Comment
  UCR197552  Castilleja campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 2008-6-23 13709 Amador Northern Sierra Nevada Mountains, Dufrene Road, 0.1 mile south of its junction with CA-88, between Mormon Emigrant Trail and Hamms Station 2076 Comment
  UCR201778  Castilleja campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 2008-8-1 13941 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road at Lyons Creek, 4.0 miles north of CA-50 2043 Comment
  UCR122776  Castilleja densiflora subsp. obispoensis George K. Helmkamp, E. A. Helmkamp 1998-5-20 3888 San Luis Obispo Central Coast, Irish Hills, 3.1 miles SE of Los Osos Valley Rd on Clark Valley Rd., SE of Los Osos 351 Comment
  UCR197253  Castilleja foliolosa George K. Helmkamp, E. A. Helmkamp 2008-4-11 13263 Calaveras Sierra Nevada Mountains Foothills, along Fricot City Road, 1.3 miles east of its junction with Calaveritas road 424 Comment
  UCR102598  Castilleja lemmonii George K. Helmkamp, E. A. Helmkamp 1997-9-11 2368 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  UCR184821  Castilleja lineariloba George K. Helmkamp, E. A. Helmkamp 2007-5-7 11961 El Dorado Foothills, Northern Sierra Nevada Mountains, Pedro Hills Road, 0.5 mile west of its junction with Calif. Hwy 49, junction of roads 5.3 miles south of Cool 311 Comment
  UCR218154  Castilleja lineariloba George K. Helmkamp, Amy Barnes 2010-5-7 16007 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  SEINET13276717 Image available Castilleja miniata subsp. miniata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-1 19426 Sierra Northern Sierra Nevada Mountains: along Hwy CA-89, c. 8 miles north of the Nevada County line (Sierraville 7.5' Q.) 1823 Comment
  UCD123001  Castilleja miniata subsp. miniata G. K. Helmkamp; E. A. Helmkamp 2007-6-20 12391 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 22.8 miles ESE of its junction with Sly Park Road at Jenkinson Lake. 2264 Comment
  UCR129545  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2001-7-8 6838 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCR171346  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2005-10-1 9985 Placer Northern Sierra Nevada Mtns., NW of Lake Tahoe; Junction of Bear Creek Dr. and Big John Road (c. 2.2 miles west of Calif. Highway 89 and just south of Alpine Meadows Road) 2015 Comment
  UCR189440  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2007-8-4 12702 Alpine Northern Sierra Nevada Mountains, Woods Lake Road 0.1 mile south of its junction with CA-88 2500 Comment
  UCR205980  Castilleja miniata subsp. miniata George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13912 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50 2043 Comment
  SD237609  Castilleja miniata var. miniata G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15269 El Dorado Sierra Nevada Mountains: Wrights Lake Road, 1.2 miles south of Wrights Lake (Pyramid Peak 7.5'Q) 2073 Comment
  UCR15491  Castilleja rubicundula subsp. lithospermoides George K. Helmkamp 1978-6-3 s.n. San Luis Obispo Central Coast, Baywood Park Comment
  UCR122629  Castilleja subinclusa subsp. franciscana George K. Helmkamp, E. A. Helmkamp 2001-6-2 6789 San Mateo Central Coast, Purissima Creek Rd., 0.9 mi from Calif. Hwy 1(junction about 4 mi south of Half Moon Bay) 91 Comment
  UCR218102  Castilleja tenuis George K. Helmkamp, E. A. Helmkamp 2010-7-23 16607 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road at the entrance to a camping area, 0.2 mile west of the lake, 5.5 miles NE (35 deg. ) of Kyburz 2114 Comment
  UCR118271  Caucalis microcarpa George K. Helmkamp, E. A. Helmkamp 2000-4-24 5522 A Monterey South Coast Range, west end Salinas Valley; Nacimiento-Fergusson Rd., 1.5 miles west of Mission Rd. just south of Mission San Antonio 320 Comment
  CLARK-A1045-1289  Caulanthus cooperi George K. Helmkamp 1978-3-17 San Diego Anza-Borrego Desert State Park rocky edge of Bisnaga Alta Wash; Sweeney Pass 7.5'Q Comment
  UCR174199  Ceanothus cordulatus George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10584 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road just north of Hwy US-50 1665 Comment
  UCR197652  Ceanothus cordulatus George K. Helmkamp, E. A. Helmkamp 2008-6-23 13745 Amador Northern Sierra Nevada Mountains, Dufrene Road, 1.5 miles south of its junction with CA-88, jct. between Mormon Emigrant Trail and Bear Valley Reservoir Road 2021 Comment
  UCR250675  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp, Mary Alice Barnes 2013-4-24 20411 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 1.9 miles east of its junction with CA-26 in West Point 652 Comment
  UCR253512  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp 2014-4-5 22666 Amador Sierra Nevada Foothills, junction of Tonzi Road and CA-124, NE of Ione 201 Comment
  UCR130599  Ceanothus foliosus subsp. medius George K. Helmkamp, E. A. Helmkamp 1999-5-21 4869 Monterey Santa Lucia Mountains, Willow Creek Road, 6.3 mi east of Calif. Hwy 1 north of Gorda 1037 Comment
  RSA782547  Ceanothus integerrimus George K. Helmkamp, Amy Barnes 2009-7-12 15184 Placer Along Foresthill Road 10.3 miles northeast of the town of Foresthill 1370 Comment
  UCR198486  Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2008-5-4 13389 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  RSA628435  Ceanothus papillosus var. roweanus George K. Helmkamp, E. A. Helmkamp 1999-5-21 4868 Monterey Willow Crk Rd, 6.3 mi E of CA-1 N of Gorda. 1037 Comment
  UCR258239  Cedrus deodara George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20030 Nevada Sierra Nevada Mountains Foothills, Robles Dr., south of the junction of Combie Road and Darkhorse Drive, 2.8 air miles SE (124 deg. ) of Higgins Corner 445 Comment
  SD248325  Centaurea solstitialis George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22134 Amador Sierra Nevada Mountains Foothills: City of Sutter Creek at the junction of Hanford St. and Spanish St. 384 Comment
  SEINET2441346  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-8-6 15397 Amador Sierra Nevada Mountains Foothills: along Hwy CA-88, 3.1 miles northeast of CA-49 in Jackson (Mokelumne Hill 7.5' Q.).; 0 424 Comment
  UCR170426  Centaurea solstitialis George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10021 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, c. 3 air mi NNW of Placerville]; South Fork of American River on the west side of Calif. Highway 193 291 Comment
  UCR182288  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2006-10-8 11486 Calaveras Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 26, 0.8 mi east of Calif. Hwy 49 in the vicinity of Mokulumne Hill 488 Comment
  UCR201565  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2008-10-2 14195 Sacramento Sacramento Valley, Latrobe Road, 7.4 miles west of Latrobe 67 Comment
  UCR201566  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2008-10-2 14194 Sacramento Sacramento Valley, Latrobe Road, 4.9 miles west of Latrobe and just east of the El Dorado Co. line 152 Comment
  UCR253793  Centaurea solstitialis George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20057 San Joaquin San Joaquin Valley, along Hwy CA-26, 0.7 mile northeast of Bellota 50 Comment
  UCR258194  Centaurea solstitialis George K. Helmkamp, Elizabeth Helmkamp 2012-10-13 20020 Placer Sacramento Valley, Granite Bay, Folsom Lake; Park Road 1.8 miles north of the east end of Douglas Blvd. 146 Comment
  UCR67437  Centaurea solstitialis George K. Helmkamp 1990-9-23 D- 4 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UCR206743  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2009-6-22 15035 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 527 Comment
  UCD121505  Centaurium tenuiflorum G. K. Helmkamp; E. A. Helmkamp 2007-8-26 12817 Amador Northern Sierra Nevada Mountains Foothills: along Hwy CA-49 at the south end of Plymouth. 323 Comment
  SD236198  Centromadia fitchii G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14223 Sutter Sacramento Valley: Pass Road on south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  SD260900  Centromadia fitchii George K. Helmkamp, E. A. Helmkamp 2012-9-7 19765 Amador Northern Sierra Nevada Mountains Foothills: along CA-49, 1.2 miles north of the juncton with Fiddletown Road at Plymouth (Amador City 7.5'Q) 299 Comment
  UC1930962  Centromadia fitchii G. K. Helmkamp, E. A. Helmkamp 2006-10-20 11549 El Dorado Northern Sierra Nevada Mountains Foothills: 0.6 mile northwest of Pleasant Valley along Pleasant Valley Road Comment
  SD148237  Centromadia pungens subsp. pungens G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6535 Kern Enos Lane Road, 1.9 mile south of California Highway 119. 60 Comment
  UCR173482  Cerastium fontanum subsp. vulgare George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10542 El Dorado Northern Sierra Nevada Mountains, Along Ice House Canyon Road, 10.6 mi. south of Wentworth Springs Road (just south of the Jones fork of Silver Creek and SE of Union Valley Reservoir) 1509 Comment
  UCR206987  Cerastium fontanum subsp. vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-28 14846 Sierra Northern Sierra Nevada Foothills, along CA-49, 1.8 miles north of the Yuba County line0 884 Comment
  CAS-BOT-BC173161  Cerastium glomeratum G. K. Helmkamp; E. A. Helmkamp 2008-5-8 13420 Calaveras Sierra Nevada Mountains Foothills: Skull Flat road, 0.4 mile north of its junction with Winton Road, northeast of West Point 823 Comment
  CAS-BOT-BC388277  Cerastium glomeratum G. K. Helmkamp; E. A. Helmkamp 2009-6-3 14879 El Dorado Foothills, northern Sierra Nevada Mountains: Pony Express Trail, 0.7 mile east of its junction with Sly Park Road in Pollock Pines 851 Comment
  CDA36254  Cerastium glomeratum G. K. Helmkamp, E. A. Helmkamp 2007-4-26 11840 Calaveras Foothills, Northern Sierra Nevada Mountains; Along Calif. Hwy 49, 1 mile west of Mokelumne Hill, 1.7 miles south of the Amador County line. Comment
  CDA36255  Cerastium glomeratum G. K. Helmkamp, E. A. Helmkamp 2007-5-9 11983 El Dorado Northern Sierra Nevada Mountains; White Meadow Road, 0.6 mile west of its junction with Ice House Road, c. 0.75 NNW of Riverton. Comment
  SEINET235069  Cerastium glomeratum G. K. Helmkamp, E. A. Helmkamp 1998-5-13 3535 Kern Greenhorn Mtns Southern Sierra Nevada: 6.5 mi. SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near Ho 396 Comment
  SEINET3271591 Image available Cerastium glomeratum George K. Helmkamp, E. A. Helmkamp 2007-4-26 11840 Calaveras Foothills, Northern Sierra Nevada Mountains; along Calif. Hwy 49, 1 mile west of Mokelumne Hill, 1.7 miles south of the Amador County line 370 Comment
  UCD98047  Cerastium glomeratum G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11840 Calaveras Northern Sierra Nevada Mountains; along CA-49, 1 mile west of Mokelumne Hill, 1.7 milse south of the Amador County line. 370 Comment
  UCR118953  Cerastium tomentosum George K. Helmkamp 2000-7-18 5848 Mono Eastern Sierra Nevada Mountains, city of Mammoth Lakes 2409 Comment
  UCR103303  Chaenactis carphoclinia var. carphoclinia George K. Helmkamp 1998-3-30 2996 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR251242  Chaenactis douglasii var. douglasii George K. Helmkamp, E. A. Helmkamp 2012-7-6 19344 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 0.4 mile north of Ice House village, 10.9 miles north of the junction with US-50 1707 Comment
  UCR158571  Chaenactis glabriuscula var. lanosa George K. Helmkamp, E. A. Helmkamp 2005-4-22 9399 San Luis Obispo Inner South Coast Ranges, Carrizo Highway at Mile-32, Calif. Hwy 58, east of Santa Margarita, beside Windmill Creek 509 Comment
  CLARK-A1045-424  Chaenactis santolinoides George K. Helmkamp 1978-6-6 San Bernardino San Bernardino Mountains north edge of Lake, at junction of State Highway 18 and Big Bear Lake dam; yellow pine forest; Fawnskin 7.5'Q Comment
  UCR122655  Chaenactis stevioides George K. Helmkamp, E. A. Helmkamp 1998-3-16 2851 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  UCR123974  Chaenactis stevioides George K. Helmkamp, E. A. Helmkamp 2001-3-30 6401 San Bernardino Mojave Desert, CA Hwy 62, 16.2 mi east of Utah Trail (Twentynine Palms) near Dale Lake 366 Comment
  UCR104786  Chaenactis xantiana George K. Helmkamp, E. A. Helmkamp 1997-3-11 1475 Los Angeles c. 12 mi. west of Lancaster at Lancaster Rd & Willow Springs Cyn. 899 Comment
  SBBG129052  Chamaebatia foliolosa G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20872 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  UCR250705  Chamaebatia foliolosa George K. Helmkamp, Mary Alice Barnes 2013-5-10 20548 El Dorado Northern Sierra Nevada Mtns. Foothills, Volcanoville Road (end of maintained road), 5.1 miles northwest of Bear Foot Road, at site of Volcanoville 960 Comment
  SEINET2042546 Image available Chamaesyce glyptosperma George K. Helmkamp, E. A. Helmkamp 1999-6-29 5052 Sutter Corner of Dry Creek Rd. & Bowman Rd, near Nielsburg, 3 mi NE of Auburn besdie I-80 & 1.5 NW of North Fork Lake on American River. (Auburn Quad 7.5'). T13N R 8 E S24 (SW/4) 457 Comment
  SBBG123004  Chamaesyce serpillifolia subsp. hirtula G. K. Helmkamp with E. A. Helmkamp 2007-7-23 12568 El Dorado Rock Creek rd, 7.1 mi E of its jct with St Hwy 193 567 Comment
  RSA602630  Chenopodium album George K. Helmkamp 1996-9-11 1159 San Diego Ca. 5 miles south of California Highway 76 on Couser Ranch Rd. onto Lilac Rd. to Wills avocado ranch., (33 deg 15.6 N, 117 deg 6 W) [UTM 10km cell: MG-9E, 8N. Weaver Mountain] 335 Comment
  SEINET954687  Chenopodium album George Helmkamp 1996-1 1159 San Diego About 5 miles south of California Highway 76 on Couser Ranch Road onto Lilac Road to Wills avocado ranch. 335 Comment
  UCR194981  Chenopodium album George K. Helmkamp, E. A. Helmkamp 2007-10-13 13096 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  CDA3032  Chenopodium berlandieri G. K. Helmkamp 2000-10-16 6222 San Bernardino Morongo Valley; Big Morongo Wildlife Preserve, ca. 0.75 mi E of the city of Morongo Valley. Comment
  IRVC29230  Chenopodium berlandieri G. K. Helmkamp, E. A. Helmkamp 2004-10-8 8851 San Luis Obispo Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek Central Coast 136 Comment
  UCR219193  Chenopodium berlandieri George K. Helmkamp, E. A. Helmkamp 2009-9-22 15644 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  UCR123948  Chenopodium botrys George K. Helmkamp, E. A. Helmkamp 2001-7-8 6989 Humboldt North Coast, CA Hwy 36, along the Van Duzen River, 19.6 mi east of CA Hwy 101, west of Bar W Road 137 Comment
  UCR101031  Chenopodium californicum George K. Helmkamp, E. A. Helmkamp 1998-4-8 3235 San Luis Obispo Soda Lake Rd, 6.6 mi. NW of jct with Calif. hwy 33 (roughly west of Maricopa). 671 Comment
  UCR107300  Chenopodium californicum George K. Helmkamp, E. A. Helmkamp 1998-5-14 3665 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  UCR136212  Chenopodium fremontii George K. Helmkamp, E. A. Helmkamp 1999-9-30 5307 San Bernardino East side San Bernardino Mountains., 7.3 mi up Burns cyn Rd from Rimrock Rd (NW of Pioneertown) 1799 Comment
  UCR132041  Chenopodium strictum George K. Helmkamp 2003-7-29 8040 B San Luis Obispo Central Coast, 0.6 mi south of Nipomo Hill in Arroyo Grande area 46 Comment
  SD237255  Chlorogalum pomeridianum G. K. Helmkamp, Amy Barnes 2009-7-12 15172 Placer Sierra Nevada Mountains Foothills: along Foresthill Road at the northeast end of the city of Foresthill. 985 Comment
  SD239515  Chlorogalum pomeridianum var. pomeridianum G. K. Helmkamp, E. A. Helmkamp 2011-7-17 17750 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95a^z) of Peardale (Chicago Park 7.5'Q) 686 Comment
  UCD130413  Chondrilla juncea G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12984 El Dorado Northern Sierra Nevada Mountains: along Greenstone Road just south of its junction with US-50 (east of Shingle Springs). 427 Comment
  UCR232638  Chondrilla juncea George K. Helmkamp, E. A. Helmkamp 2011-10-13 18416 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 8.1 miles northwest of Pollock Pines, at north side of bridge over the South Fork American River 596 Comment
  UCR241740  Chondrilla juncea George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19814 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 10.4 miles northeast of Hidden Treasure Road, 0.45 mi. ESE of Whisky Hill 1677 Comment
  UCR242014  Chondrilla juncea George K. Helmkamp, E. A. Helmkamp 2012-9-17 19861 El Dorado Northern Sierra Nevada Mountains Foothills, north of Pollock Pines, along Forebay Road at South Fork American River 564 Comment
  UCR93382  Chorispora tenella George K. Helmkamp, E. A. Helmkamp 1993-5-9 s.n. Modoc 2 mi from the Nevada border along calif. Hwy 139 1316 Comment
  UCR51899  Chorizanthe brevicornu var. spathulata George K. Helmkamp 1978-5-28 s.n. Mono Lower Rock Creek 1677 Comment
  CLARK-A1045-1345  Chorizanthe californica George K. Helmkamp 1978-6-3 San Luis Obispo Los Osos Montana de Oro State Park, coastal strand; Morro Bay S 7.5'Q Comment
  RSA489119  Chorizanthe corrugata George K. Helmkamp 1988-2-28 25 Imperial At end of dirt road ca. 2 miles WSW of Crucifixion Thorn Natural Area, SE of Ocotillo and SW of Hwy 98., [10 km cell; PG-1N, 0E] 152 Comment
  UCR116696  Chorizanthe fimbriata George K. Helmkamp 1974-7-16 s.n. Riverside Santa Ana Mtns. region, Ortega Oaks Park on Hwy 74 610 Comment
  UCR87844  Chorizanthe leptotheca George K. Helmkamp, E. A. Helmkamp 1995-6-20 95-2- 22 San Luis Obispo Central Coast, Bear Creek Ranch, 6 miles SE of Los Osos on Clark Valley Road 400 Comment
  UCR216336  Chrysanthemum leucanthemum George K. Helmkamp 2004-3-23 08396 San Luis Obispo Central Coast, ENE of Nipomo; 1.5 miles SW of Rancho Rd along Dana Foothill Rd. 171 Comment
  UCR14386  Chrysanthemum parthenium George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Angelus Oaks, Robin Oak Dr. 1734 Comment
  UCR131901  Chrysanthemum segetum George K. Helmkamp, E. A. Helmkamp 2000-6-18 5734 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR231821  Chrysolepis sempervirens George K. Helmkamp, E. A. Helmkamp 2010-8-14 16768 A Placer Northern Sierra Nevada Mountains, Deadwood Road, 1.2 miles south of its junction wih Forest Hill Road 1564 Comment
  SD225041  Chylismia claviformis G. K. Helmkamp 1998-4-4 3136 San Bernardino Southern Mojave Desert; junction of CA hwy 62 (Twentynine Palms hwy) & CA hwy 177 (Desert Center - Rice Rd) 456 Comment
  UCSB37362  Chylismia claviformis Helmkamp, G. 1973-6-14 Mono S. Mono Co., California; near Inyo Co. line US 395 on Sherwin Grade 1981 Comment
  SD227856  Chylismia claviformis subsp. aurantiaca G. K. Helmkamp, E. A. Helmkamp 1998-2-26 2796 San Bernardino Mojave Desert: NW side of Salt Spring Hills about 28 mi N of Baker; between the hills and Hwy CA-127 200 Comment
  UCR190225  Cichorium intybus George K. Helmkamp, E. A. Helmkamp 2007-9-14 12949 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road 0.4 mile east of Foresthill 942 Comment
  UCR219261  Cicuta douglasii George K. Helmkamp, E. A. Helmkamp 2010-7-13 16539 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2492 Comment
  UCR201910  Cirsium andersonii George K. Helmkamp, E. A. Helmkamp 2008-8-30 14054 El Dorado Northern Sierra Nevada Mountains, Leek Spring Valley, Foster Meadow Road 0.9 miles southwest of its junction with Mormon Emigrant Trail 2241 Comment
  UCR248406  Cirsium andersonii George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 22001 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.8 mile north of its junction with CA-88 and near Jim Quinn Spring 2117 Comment
  UCR173723  Cirsium occidentale var. candidissimum George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10572 El Dorado Northern Sierra Nevada foothills, along Hwy US-50, 7.2 miles east of Ice House Canyon Road 1162 Comment
  IRVC29533  Cirsium scariosum G. K. Helmkamp, Elizabeth Helmkamp 1999-10-16 5320 Mono Along Owens River, 0.6 mi NW of Benton's Crossing. Sierra Nevada Mountains 2119 Comment
  UCR257777  Cirsium vulgare George K. Helmkamp, Amy Barnes 2012-8-19 19679 El Dorado Northern Sierra Nevada Mountains, unnamed dirt road along Ice House Road, 0.4 mile south of Robbs Peak Road, N of Union Valley Reservoir 1756 Comment
  RSA779392  Cistanthe monosperma George K. Helmkamp, E. A. Helmkamp 2009-6-29 15080 El Dorado Ice House Road, 8.2 miles north of its junction with CA-50, c. 10.5 air miles NE (73 deg ) of Pollock Pines 1646 Comment
  UCR217876  Clarkia gracilis subsp. gracilis George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16129 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 2.9 miles east of its junction with Perry Creek road 1012 Comment
  CAS-BOT-BC163637  Clarkia purpurea subsp. quadrivulnera G. K. Helmkamp; E. A. Helmkamp 2010-6-23 16353 Amador Sierra Nevada Mountains Foothills: Sutter Creek Road, 9.5 miles northeast of its junction with old CA-49 in Sutter Creek village 576 Comment
  SEINET12806741  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, Elizabeth Helmkamp 2005-1 9432 Monterey 8 mi west of US 101 on Hwy CA-G-18 in Hames Valley 327 Comment
  SEINET13203105 Image available Clarkia purpurea subsp. quadrivulnera George K. Helmkamp 2014-1 22885 Calaveras Sierra Nevada Mountains Foothills: along CA-26, 2.6 miles northeast of CA-49 at Mokelumne Hill (Mokelumne Hill 7.5' Q.) 518 Comment
  UCR159305  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2005-4-22 9388 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR173272  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10436 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along Forest Hill Road, 1.8 mi. NE of its junction with Calif. Hwy 49 at the middle fork of the American River 370 Comment
  CAS-BOT-BC229029  Clarkia rhomboidea George K. Helmkamp; E. A. Helmkamp 2011-7-30 17906 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road, 2.25 mi. NW (295 deg. ) of jct. with Hwy 88; 7.2 miles southeast of Omo Ranch 1346 Comment
  CLARK-A1045-67  Clarkia similis George K. Helmkamp 1978-5-18 Riverside San Jacinto Mountains along State Highway 243 [vicinity of Mountain Center?]; in chaparral; ; Idyllwild 15'Q 1219 Comment
  SEINET272172  Clarkia similis G. K. Helmkamp, E. A. Helmkamp 1997-4-24 1657 Orange Cleveland National Forest ; Cleveland National Forest 1.6 mi. SE of Ortega Hwy (CA-74) on Rd. 7-S14. UTM 10km cell: MH-5E 1N. San Juan Hot Spring 549 Comment
  RSA709019  Clarkia speciosa subsp. speciosa George K. Helmkamp, E. A. Helmkamp 2005-5-12 9437 Monterey Central Coast Ranges: 8 mi west of US-101 on Hwy CA-G-18 in Hames Valley. 341 Comment
  UCR160970  Clarkia speciosa subsp. speciosa George K. Helmkamp, E. A. Helmkamp 2005-6-12 9659 San Luis Obispo South Central Coast Range, Along Calif. Highway 229 (road to Creston), 5.5 mi N of Calif. Highway 58; beside West Branch of Huerhuero Creek 363 Comment
  UCR249166  Clarkia stellata George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20795 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.9 miles NE of the Yuba County line, NE of Camptonville 796 Comment
  UCR103289  Clarkia tembloriensis subsp. tembloriensis George K. Helmkamp, E. A. Helmkamp 1998-5-14 3617 Fresno Inner South Coast Range, Warthan Creek Canyon, near Curry Mtn., c. 6-7 miles (airline) SW of Coalinga, along Calif. Hwy 198, 20.8 mi. west of Interstate 5 366 Comment
  SD236340  Clarkia williamsonii G. K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10793 Calaveras Northern Sierra Nevada foothills: along Hwy CA-26, 0.6 mile past Sandy Gulch. 793 Comment
  UCR157795  Clarkia xantiana George K. Helmkamp, E. A. Helmkamp 1998-6-29 4138 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
Read comments
Jun 4 2008
  UCR197386  Claytonia parviflora George K. Helmkamp, E. A. Helmkamp 2008-3-18 13182 Calaveras Sierra Nevada Mountains Foothills, Jesus Maria Road, 0.5 mile south of CA-26, about 1.7 miles southeast of Mokelumne Hill 427 Comment
  SEINET2441032  Claytonia parviflora subsp. grandiflora George K. Helmkamp, E. A. Helmkamp 2010-5-13 16016 El Dorado Sierra Nevada Mountains Foothills: Mosquito Road, 4.4 miles northeast of its junction with US-50 in Placerville. (Garden Valley 7.5' Q.). 620 Comment
  CAS-BOT-BC439445  Claytonia parviflora subsp. parviflora G. K. Helmkamp; E. A. Helmkamp 2008-4-30 13347 El Dorado Sierra Nevada Mountains Foothills: junction of Meadow Brook and Bear Creek Roads at Traverse Creek, south of Georgetown. 674 Comment
  SEINET1004399  Claytonia parviflora subsp. parviflora George K. Helmkamp 2004-1 8228 San Luis Obispo Central Coast: Nipomo Mesa, Pomeroy Rd, 1.1 mi N of Willow Rd. 130 Comment
  UCD100685  Claytonia parviflora subsp. parviflora G. K. Helmkamp; E. A. Helmkamp 2007-5-9 11975 El Dorado Northern Sierra Nevada Foothills: Ice House Road, 2.0 miles northeast of US-50, c. 1.25 mi. NE of Riverton. 1220 Comment
  UCR189484  Claytonia perfoliata George K. Helmkamp, E. A. Helmkamp 2007-3-17 11640 Amador Sacramento Valley/ Sierra Nevada Foothills, Hwy CA-24, 3.2 mi southwest of Plymouth near Tonzi Road 210 Comment
  SEINET3828314  Claytonia perfoliata subsp. mexicana George K. Helmkamp, E. A. Helmkamp 2010-1 15779 Sacramento Sacramento Valley/lower Sierra Nevada Foothills: along CA-16 (Jackson Rd.) 82 Comment
  UCR198468  Claytonia perfoliata subsp. perfoliata George K. Helmkamp, E. A. Helmkamp 2008-3-12 13155 Amador Sierra Nevada Mountains Foothills, Middle Bar Road, 3.2 miles south of its junction with CA-49 at Scottsville 229 Comment
  UCR140055  Clematis lasiantha George K. Helmkamp 2004-4-21 8502 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  IRVC28950  Clematis ligusticifolia G. K. Helmkamp 2003-9-21 8165 San Luis Obispo Los Berros Rd, 0.9 mi SE of El Campo Rd., SE of Arroyo Grande Central Coast 46 Comment
  SBBG123125  Clematis ligusticifolia G. K. Helmkamp with E. A. Helmkamp 2007-7-23 12591 El Dorado Traverse Crk Rd at the crossing of Traverse Crk, ca. 2 mi SE of its jct with Hwy 193 732 Comment
  RSA0035679  Collinsia bartsiifolia var. bartsiifolia George K. Helmkamp, Elizabeth A. Helmkamp 2013-5-24 20674 Calaveras Whiskey Slide Road, 2.6 miles south of its junction with Jesus Maria Road, 7.9 mi. SE (118 ) of Mokelumne Hill 561 Comment
  SD234522  Collinsia bartsiifolia var. bartsiifolia G. K. Helmkamp, Elizabeth A. Helmkamp 2006-6-4 10632 El Dorado Northern Sierra Nevada foothills: Rock Creek Road, about 2.2 miles east of its junction with Hwy CA-193. 423 Comment
  UCR208331  Collinsia bartsiifolia var. bartsiifolia George K. Helmkamp, E. A. Helmkamp 2009-4-21 14548 El Dorado Sierra Nevada Mountains Foothills, along CA-193, 1.1 miles south of the South Fork American River at Chili Bar 381 Comment
  UCR250897  Collinsia bartsiifolia var. bartsiifolia George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20674 Calaveras Northern Sierra Nevada Mountains Foothills, Whiskey Slide Road, 2.6 miles south of its junction with Jesus Maria Road, 7.9 mi. SE (118 deg. ) of Mokelumne Hill 561 Comment
  UCR121592  Collinsia bartsiifolia var. davidsonii George K. Helmkamp, E. A. Helmkamp 2002-4-22 7432 San Benito San Andreas rift zone., Bitterwater Valley along Calif. Hwy 25, 17.6 mi north of Calif. Hwy 198 518 Comment
  UCR140056  Collinsia bartsiifolia var. davidsonii George K. Helmkamp 2004-4-21 8503 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR158604  Collinsia bartsiifolia var. davidsonii George K. Helmkamp, E. A. Helmkamp 2005-4-16 9353 Santa Barbara Outer South Coast Range, Sierra Madre Mountains, 1.1 mi south of Calif. Hwy 166 on Miranda Pines Road 526 Comment
  SD257327  Collinsia heterophylla George K. Helmkamp, Elizabeth Helmkamp 2013-5-2 20454 El Dorado Sierra Nevada Mountains Foothills: NW of Somerset, Bucks Bar Road, 1.1 miles southeast of its junction with Pleasant Valley Road (Camino 7.5'Q) 622 Comment
  UCR129526  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2001-5-31 6751 Santa Clara San Francisco Bay, Mt. Hamilton Rd. east of San Jose at Mile-15 290 Comment
  UCR159845  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2005-6-12 9622 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR160565  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2005-6-7 9544 San Luis Obispo Outer South Coast Ranges, along Huasna Road, 1.3 mile west of Huasna Townsite Road 305 Comment
  UCR140474  Collinsia heterophylla var. heterophylla George K. Helmkamp 2004-4-23 8548 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd 0.8 mi E. of Midland School, c. 7 mi NE of Los Olivos 396 Comment
  UCR173363  Collinsia heterophylla var. heterophylla George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10366 Amador Northern Sierra Nevada Foothills, Near Enterprise, c. 0.4 mi. east of Calif. Hwy 88 on an unnamed dirt road (probably Bell Road) 305 Comment
  SD237613  Collinsia tinctoria G. K. Helmkamp, E. A. Helmkamp 2010-6-26 16369 Placer Sierra Nevada Mountains Foothills: juncton of Canyon Way and Yankee Jim's Road, east of I-80 between Weimar and Colfax (Colfax 7.5'Q) 616 Comment
  UCR87703  Collinsia torreyi George K. Helmkamp, E. A. Helmkamp 1995-6-22 95- 5 -24 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UC2044601  Collinsia torreyi var. torreyi George K. Helmkamp with Elizabeth Helmkamp 2013-6-19 20938 El Dorado Northern Sierra Nevada Mountains Silver Fork Road, 0.8 mile north of Mormon Emigrant Trail and near Jim Quinn Spring, N of Carson Pass Highway. (Tragedy Spring 7.5' Q.) Comment
  UCR123914  Collomia grandiflora George K. Helmkamp, E. A. Helmkamp 2001-7-8 6928 Trinity Trinity Mountains, Calif. Hwy 36, 2.2 mi west of the Trinity/Shasta Co. line 1159 Comment
  RSA0013379  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-5-24 17366 El Dorado Northern Sierra Nevada Mountains Foothills: Mesquite Road, 7.5 nukes south of its junction with Wentworth Springs Road. 1073 Comment
  SEINET2445705  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2007-5-18 12035 Placer Northern Sierra Nevada Mountains Foothills. Mosquito Ridge Road near the crossing of the North Fork of the West Fork of the American River; 9.5 miles SE of Foresthill. (michigan Bluff 7.5' Q). 439 Comment
  UCR219020  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2010-6-23 16344 Amador Sierra Nevada Mountains Foothills, Sutter Creek Road, 7.2 miles northeast of its junction with old CA-49 in Sutter Creek village 473 Comment
  UCR231107  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-9-16 18278 Calaveras Northern Sierra Nevada Mountains Foothills, Bald Mountain Road, 1.5 miles SW of Hunter Creek crossing, 7.3 miles NE of the junction of Blue Mountain Rd and Rail Road Flat Rd 1037 Comment
  UCD118094  Collomia linearis G. K. Helmkamp 2007-7-7 12466 El Dorado Northern Sierra Nevada Mountains: Along CA-89, 0.9 mile W of Luther Pass in the Grass Lake area. 712 Comment
  UCR121930  Collomia linearis George K. Helmkamp, E. A. Helmkamp 2000-7-19 5932 Inyo Sierra Nevada Mountains, Mosquito Flat, 0.9 mi south of Rock Creek Lake, beside Rock Creek 3140 Comment
  UCR189015  Collomia linearis George K. Helmkamp 2007-7-7 12466 El Dorado Northern Sierra Nevada Mountains, along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area 2338 Comment
  UCR197654  Collomia linearis George K. Helmkamp, E. A. Helmkamp 2008-6-9 13650 El Dorado Northern Sierra Nevada Mountains, Cat Creek Road, 3.6 miles north of its junction with CA-88, the jct. is 4.2 miles east of Cook's Station 1753 Comment
  UCR170425  Conyza bonariensis George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10020 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, c. 3 air mi NNW of Placerville]; South Fork of American River on the west side of Calif. Highway 193 291 Comment
  UCR235296  Conyza bonariensis George K. Helmkamp, E. A. Helmkamp 2011-11-21 18474 A San Joaquin Northeastern San Joaquin Valley, along Johnson Road, 0.8 mile south of its junction with CA-12, NE of Lockeford, SW of Camanche Reservoir 53 Comment
  UCR193458  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2007-9-9 12917 Sacramento Sacramento Valley, along Hwy CA-16, 0.8 mile west of the Amador County line 85 Comment
  UCR205139  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14243 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCR232627  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2011-10-13 18409 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 8.1 miles northwest of Pollock Pines at the south side of the bridge over the South Fork American River 611 Comment
  UCR233044  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2011-9-24 18328 El Dorado Northern Sierra Nevada Mountains, Loon Lake Road at the junction to the campground at the south end of the lake 1973 Comment
  UCR233285  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2010-9-23 16954 El Dorado Northern Sierra Nevada Mountains, Forest Route 31, 3.4 miles north of its junction with Peavine Ridge Road and Round Tent Canyon Road 1463 Comment
  UCR58305  Cordylanthus rigidus George K. Helmkamp 1989-10-7 s.n. Riverside San Bernardino Mtns., N edge of the fish hatchery in Whitewater Canyon, north of I-10 700 Comment
  HSC104240  Cordylanthus tenuis subsp. tenuis G. K. Helmkamp, Amy Barnes 2014-7-28 22955 El Dorado Sierra Nevada Mountains; Wentworth Springs Rd., 3.8 mi. E of Stumpy Meadows Reservoir 1357 Comment
  UCR189638  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2007-7-27 12629 Placer Northern Sierra Nevada Mountains, Southeast end of Cisco Grove; along local road just before it passes under Interstate-80 1744 Comment
  UCR250615  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20891 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 8.3 miles east of its junction with Hwy E-16 at Jenkinsons Lake 1456 Comment
  UCR102531  Coreopsis bigelovii George K. Helmkamp, E. A. Helmkamp 1997-3-6 1357 Los Angeles Tehachapi Mtns., Hills south of Gorman. Along Gorman Post Rd c. 1.1 mi. NW of Calif. Hwy 138 1128 Comment
  UCR161936  Coreopsis douglasii George K. Helmkamp, E. A. Helmkamp 2005-3-1 8987 San Luis Obispo South Outer Coast Ranges, Santa Lucia Range NE of Lopez Lake; 4.8 mi. N of Hi Mountain Road along Upper Lopez Lake Road. Vicinity of Wittenberg and Huffs Hole Creeks 232 Comment
  RSA792066  Coreopsis lanceolata George K. Helmkamp, E. A. Helmkamp 2012-6-13 19199 Nevada Northern Sierra Nevada Mountains Foothills: village of Washington, Relief Hill Road, 0.4 miles north of its junction with Maybert Road and northeast of the bridge over the South Yuba River. 790 Comment
  UCR171325  Coreopsis tinctoria George K. Helmkamp, E. A. Helmkamp 2005-7-11 9680 El Dorado Northern Sierra Nevada Foothills, Cameron Park (E of Sacramento, along US Highway 50); corner of Santos Street and Santos Court Road 370 Comment
  SD132260  Corethrogyne filaginifolia G. Helmkamp 1990-9-5 Monterey 2 miles north of Gorda. 45 Comment
  RSA750430  Cornus sericea subsp. sericea George K. Helmkamp, E. A. Helmkamp 2008-8-20 14020 Placer Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR158620  Cornus sericea subsp. sericea George K. Helmkamp, E. A. Helmkamp 2004-6-20 8653 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR234662  Cornus sericea subsp. sericea George K. Helmkamp, E. A. Helmkamp 2010-8-26 16835 Nevada Northern Sierra Nevada Mountains, South Fork Yuba River, Forest Route 85 (Fordyce Lake Rd) north of Hampshire Rocks Road and I-80, 1 mi. NNW (351 deg. ) of Cisco 1634 Comment
  SEINET3860250  Coronilla varia George K. Helmkamp, Mary Alice Barnes; Mary Jane Ganibe 2010-7-6 16447 El Dorado Sierra Nevada Mountains: Silver Fork road, at the junction with US-50 in Kyburz.; 0 1328 Comment
  RSA751093  Crepis acuminata George K. Helmkamp, E. A. Helmkamp 2008-7-11 13782 El Dorado north side of CA-88, 2.1 miles northeast of the junction with Mormon Emigrant Trail 2340 Comment
  UCR123972  Crepis acuminata George K. Helmkamp, E. A. Helmkamp 2001-7-6 6839 A Alpine Sierra Nevada Mountains, Calif. Hwy 89, 7.1 mi west of US-395 2470 Comment
  CLARK-A1045-294  Crossosoma bigelovii George K. Helmkamp 1977-5-20 Riverside San Jacinto Mountains .5 mile up from UC Research Station; rocky wall at base of Canyon; Palm Desert 15'Q Comment
  UCD142098  Croton setiger G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12982 El Dorado Northern Sierra Nevada Mountains: along Greenstone Road just south of its junction with US-50 (east of Shingle Springs). 427 Comment
  UCR233377  Croton setiger George K. Helmkamp, E. A. Helmkamp 2011-9-16 18294 Calaveras Northern Sierra Nevada Mountains Foothills, along Schaad Road, 2.2 miles north of its junction with Blue Mountain Road, 4.8 miles due east (90 deg. ) of Westpoint 954 Comment
  UCR233639  Croton setiger George K. Helmkamp, E. A. Helmkamp 2011-7-17 17786 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road just northeast of its junction with CA-174, 1.25 mi. east (91 deg. ) of Peardale 778 Comment
  UCR96379  Crypsis schoenoides George K. Helmkamp 1996-9-21 1186 San Luis Obispo Coast Ranges, Santa Margarita Lake, south picnic area 396 Comment
  CAS-BOT-BC334216  Cryptantha affinis George K. Helmkamp; E. A. Helmkamp 2011-8-6 18015 Amador Northern Sierra Nevada Mountains: along dirt road 0.3 mile E of Bear River Reservoir Road, from a point 0.7 miles S of CA-88 1986 Comment
  SEINET11261451  Cryptantha affinis George Helmkamp, E. A. Helmkamp 2011-8-6 18015 Amador Northern Sierra Nevada Mountains along dirt road .3 miles E of Bear River Reservoir Road, from a point .7 miles south of CA-88.; 0 1985 Comment
  UCR102607  Cryptantha ambigua George K. Helmkamp, E. A. Helmkamp 1997-9-12 2419 Mono Eastern Sierra Nevada Mtns., Pumice Mine Rd, running NE from US Hwy 395, (N of the June Lake area); at S edge of Mono Craters 1997 Comment
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Nov 12 2015
  UCR57543  Cryptantha ambigua George K. Helmkamp 1989-8-1 s.n. Mono Sierra Nevada Mtns., West Walker River, at Hwy 395, 4 mi. south of Walker 1890 Comment
  SD224871  Cryptantha angustifolia G. K. Helmkamp 1998-3-30 3008 San Bernardino Mojave Desert: Dale Dry Lake, E of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR122656  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 1998-3-16 2852 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  UCR123981  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 2001-3-30 6388 San Bernardino Mojave Desert, CA Hwy 62, 16.2 mi east of Utah Trail (Twentynine Palms) near Dale Lake 366 Comment
  RSA712692  Cryptantha barbigera George K. Helmkamp 1984-5-2 D- 10 Riverside Big Morongo Canyon, 3 - 3.5 miles below the caretakers s house at the Big Morongo Preserve. 549 Comment
  UCR51299  Cryptantha barbigera George K. Helmkamp 1988-4-29 s.n. San Bernardino Eastern Mojave Desert, Fenner Valley between Hackberry Mtns & Vontrigger Hills, 11.3 mi NNW of Goffs 1100 Comment
  UCR92482  Cryptantha barbigera George K. Helmkamp 1995-3-16 s.n. Riverside Sonoran (Colorado) Desert, Below Coxcomb Mtns., west of Rice Rd., 10.3 mi. NE of Desert Center 200 Comment
  UCR122800  Cryptantha circumscissa George K. Helmkamp, E. A. Helmkamp 2001-3-31 6341 A San Bernardino Eastern Mojave Desert, Goffs Rd, 8.1 mi east of Goffs 610 Comment
  UCR140156  Cryptantha clevelandii George K. Helmkamp 2004-4-1 8417 San Luis Obispo Central Coast, Nipomo Mesa; Mesa Dunes Mobile Home Park along Mesa View Dr., 0.2 mi south of Halcyon Rd. 76 Comment
  UCR15590  Cryptantha confertiflora George K. Helmkamp 1978-5-29 s.n. Mono East Walker River at the Nevada border 1829 Comment
  UCR256498  Cryptantha flaccida George K. Helmkamp, Amy Barnes 2014-5-8 22842 Amador Sacramento Valley/Sierra Nevada Foothills, Tonzi Road, 0.4 mile east of its junction with CA-124, 4.5 air miles NE (35 deg. ) of Ione 188 Comment
  UCR15457  Cryptantha holoptera George K. Helmkamp 1977-3-12 s.n. Riverside Sonoran (Colorado) Desert, Deep Canyon at the bottom of the main wash near marker 40. South of Palm Desert 305 Comment
  UCR101789  Cryptantha intermedia George K. Helmkamp, E. A. Helmkamp 1997-3-5 1322 Riverside 2.8 mi SE of Gilman Hot Springs 518 Comment
  SDSU20826  Cryptantha mariposae George L. Helmkamp, E. A. Helmkamp 2010-4-3 15796 Amador Low foothills northern Sierra Nevada Mountains: 4.35 mi. NE of Ione, Junction of Tonzi Road and CA-124/East Plymouth HWY. 180 Comment
  UCR103353  Cryptantha maritima George K. Helmkamp, E. Helmkamp 1998-1-24 2595 Imperial Sonoran (Colorado) Desert, Gravel Rd south of Hwy I-8. Rocky hills at W edge of Fort Yuma Indian Reservation. 61 Comment
  UCR14499  Cryptantha pterocarya var. pterocarya George K. Helmkamp 1974-5-4 s.n. Inyo Owens Valley, Pleasant Valley along the Owens River, 9 mi NW of Bishop 1311 Comment
  CLARK-A1045-1283  Cryptantha racemosa George K. Helmkamp 1978-3-16 San Diego Anza-Borrego Desert State Park Canon sin Nombre [No-name Canyon]; silty deposit; Sweeney Pass 7.5'Q Comment
  HSC79081  Cryptantha racemosa G. K. Helmkamp 1984-5-5 - 4 Riverside Little San Bernardino Mtns., Big Morongo Canyon, 4 mi. below the caretaker's house at the Big Morongo Preserve 549 Comment
  SBBG129259  Cryptantha torreyana G. K. Helmkamp, E. A. Helmkamp 2013-7-10 21004 Amador Plasse Rd toward Silver Lake, 0.3 mile south of CA-88/Carson Pass Highway 2276 Comment
  UCR103535  Cryptogramma cascadensis George K. Helmkamp, E. A. Helmkamp 1997-9-11 2362 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  UCR171544  Cupressus bakeri George K. Helmkamp, E. A. Helmkamp 2006-1-16 10045 El Dorado Northern Sierra Nevada Foothills, Corner of Pleasant Valley Road and Patterson Drive, at the W end of Diamond Springs 537 Comment
  UCD127372  Cymopterus terebinthinus var. californicus G. K. Helmkamp; E. A. Helmkamp 2007-7-7 12505 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 12.0 miles south of its junction with CA-88. 2549 Comment
  UCR124085  Cynodon dactylon George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5350 San Bernardino Sonoran (Colorado) Desert, Sacramento Spring. Along Calif. Hwy 95, 1.6 mi north of Interstate-40 396 Comment
  UCR76727  Cyperus George K. Helmkamp 1993-7-20 E- 2 Santa Clara San Francisco Bay Region, Above Stevens Creek Reservoir, SE of Cupertino 488 Comment
  UCR233416  Cyperus difformis George K. Helmkamp, E. A. Helmkamp 2011-10-8 18384 Glenn Northern Sacramento Valley, Co. Road 61 (Riz Rd.), 2.6 miles east of CA-45 and at the junction with Co. Road V, 8.26 mi. SE (124 deg. ) of Willows 26 Comment
  UCR190140  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2007-9-14 12950 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road 0.4 mile east of Foresthill 942 Comment
  UCR193517  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2007-9-9 12916 Sacramento Sacramento Valley, along Hwy CA-16, 0.8 mile west of the Amador County line 85 Comment
  UCR241752  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2012-10-9 20008 Nevada Northern Sierra Nevada Mountains Foothills, Higgins Corner; Combie Road, 0.1 mile east of its junction with CA-49, between Auburn and Grass Valley 445 Comment
  UCR253490  Cyperus eragrostis George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20073 San Joaquin San Joaquin Valley, Rock Creek, at East Sonora Road, 1.3 miles southeast of CA-4 50 Comment
  UCR95912  Cyperus erythrorhizos George K. Helmkamp 1996-9-21 1194 San Luis Obispo Coast Ranges, Santa Margarita Lake, south picnic area 396 Comment
  UCR171542  Cyperus esculentus George K. Helmkamp, E. A. Helmkamp 2005-7-31 9734 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR79503  Cyperus odoratus George K. Helmkamp 1993-11-4 X 11 Imperial Sonoran (Colorado) Desert, Boat dock at edge of the old bed of the Colorado River, 0.25 mi south of Walter's Camp (30 mi by road south of Blythe) 91 Comment
  UCD60381  Cystopteris fragilis G. K. Helmkamp; E. A. Helmkamp 2007-4-27 11859 El Dorado Northern Sierra Nevada Mountains: Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House. 1027 Comment
  UCD105677  Cytisus scoparius G. K. Helmkamp; Elizabeth Helmkamp 2006-5-20 10503 El Dorado Northern Sierra Nevada Foothills: ca. 5 air mi off CA Hwy 193, E of Georgetown; 1.7 mi. N of Wentworth Springs Road on Bottlehill Road (junction just E of Balderson Station). 972 Comment
  UCR190205  Cytisus scoparius George K. Helmkamp, E. A. Helmkamp 2007-7-23 12576 El Dorado Northern Sierra Nevada Mountains Foothills, along Hwy CA-193, 1.0 mile south of Georgetown 771 Comment
  UCR197368  Cytisus scoparius George K. Helmkamp, E. A. Helmkamp 2008-4-25 13332 El Dorado Sierra Nevada Mountains Foothills, along Bear Creek Road 0.4 mile southeast of its junction with Meadow Brook Road, SE of Georgetown 747 Comment
  SD237264  Dactylis glomerata G. K. Helmkamp, E. A. Helmkamp 2008-6-5 13606 El Dorado Sierra Nevada Mountains Foothills: Forbay Road. .5 mile north of its crossing if the South Fork American River. 668 Comment
  UCR188557  Dactylis glomerata George K. Helmkamp, E. A. Helmkamp 2007-9-26 13016 El Dorado Northern Sierra Nevada Mountains Foothills, Bonetti Road, 1.1 miles south of its junction with Mormon Emigrant Trail, just east of Jenkinson Lake 1189 Comment
  UCR230109  Dactylis glomerata George K. Helmkamp, E. A. Helmkamp 2011-5-26 17383 Nevada Northern Sierra Nevada Mountains Foothills, SE of Grass Valley near Rollins Reservoir dam, along CA-174 NNW of Colfax, just west of the bridge over Bear River 613 Comment
  UCR104808  Dalea mollissima George K. Helmkamp, E. A. Helmkamp 1998-2-18 2741 Riverside Chuckwalla Mtns, Graham Pass Rd, 10.6 mi. SSW of Chuckwalla Valley Rd. 488 Comment
  UCR175724  Danthonia californica var. americana George K. Helmkamp, E. A. Helmkamp 2006-7-10 10917 El Dorado Northern Sierra Nevada Mountains, 0.5 mile east of the junction of Wright's Lake Road and the road from Ice House Reservoir 2056 Comment
  IRVC29306  Datura stramonium G. K. Helmkamp, E. A. Helmkamp 2004-10-8 8834 San Luis Obispo Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek Central Coast 136 Comment
  SEINET3246141  Daucus carota G. K. Helmkamp, E. A. Helmkamp 2009-1 15662 El Dorado Sierra Nevada Mountains Foothills: Cedar Ravine Road at the junction with Camp Nauvoo Road, 0.1 mile south of Weber Creek and c. 2.5 mi. SE of Placerville. 567 Comment
  UCR219150  Daucus carota George K. Helmkamp, E. A. Helmkamp 2009-9-30 15662 El Dorado Sierra Nevada Mountains Foothills, Cedar Ravine Road at the junction with Camp Nauvoo Road, 0.1 mile south of Weber Creek and c. 2.5 mi. SE of Placerville 567 Comment
  SD148084  Delphinium G. K. Helmkamp, E. A. Helmkamp 2001-5-29 6700 San Benito San Andrea Rift Zone: Coalinga Rd., 2 mi SE of Hernandez 732 Comment
  UCR208275  Delphinium gracilentum George K. Helmkamp, E. A. Helmkamp 2009-5-7 14642 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 13.6 miles east of its junction with Forest Hill Road in Foresthill 771 Comment
  UCR130967  Delphinium hansenii subsp. hansenii George K. Helmkamp, E. A. Helmkamp 1998-5-13 3544 Kern Southern Sierra Nevada Mtns., Greenhorn Mtns. Foothills, 6.5 mi. SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near Horse Canyon 396 Comment
  UCR175648  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2006-7-7 10837 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 3.2 miles north of Hwy US-50, northeast of Kyburz 1982 Comment
  UCD96271  Delphinium parryi G. K. Helmkamp 2004-4-21 8481 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 411 Comment
  UCR122183  Delphinium patens subsp. patens George K. Helmkamp, E. A. Helmkamp 2002-4-23 7600 San Benito Inner South Coast Ranges, County Hwy J-1(Panoche Rd) 15.6 mi SE of its junction with CA Hwy 25; along Tres Pinos Creek 671 Comment
  UCR161330  Dendromecon rigida George K. Helmkamp, E. A. Helmkamp 2005-3-5 9019 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness north of Lake Lopez, Upper Lopez Canyon Road, 7.2 mi north of jct with Lopez Road and at Water End Road 174 Comment
  SEINET3282778 Image available Deschampsia cespitosa subsp. cespitosa George K. Helmkamp, E. A. Helmkamp 2008-8-1 13955 El Dorado Northern Sierra Nevada Mountains; Dark Lake 0.4 mile northwest of the entrance to Wright's Lake along Wright's Lake Road. 2148 Comment
  UCR96429  Deschampsia cespitosa subsp. cespitosa George K. Helmkamp 1996-9-29 1246 Inyo Mosquito Flats, [3.9 mi] south of Rock Creek Lake (S of Tom's Place) 3140 Comment
  CLARK-A1045-463  Deschampsia danthonioides George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north end of Baldwin Lake; moist flat; Big Bear City 7.5'Q Comment
  UCD62794  Deschampsia danthonioides G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10945 El Dorado Northern Sierra Nevada Mtns. Mount Ralston Trail and Hwy. U.S.-50, about 0.9 mile south of Twin Bridges. 1960 Comment
  UCR120499  Deschampsia danthonioides George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-29 5030 Placer Northern Sierra Nevada Range, N of Hwy I-80 at west exit to Donner Lake; opening to Negro Canyon 2134 Comment
  UCR176448  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2006-7-10 10880 A El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 6.1 miles north of Hwy US-50; at the junction with the road from Ice House Reservoir 2030 Comment
  UCR230707  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2011-7-19 17822 B Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR232248  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2010-8-3 16698 Calaveras Northern Sierra Nevada Mountains, along CA-4, 0.8 mile southwest of the junction with Forest Route 7N23/ Black Creek Rd., NE of Dorrington 1854 Comment
  UCR51566  Deschampsia elongata George K. Helmkamp 1987-6-17 s.n. Mono Owens Valley, Big Spring, beside Owens River 2256 Comment
  UC2015608  Desmodium tortuosum George Helmkamp 1995-10-23 San Bernardino Mojave Desert: Yucca Valley. Weed in garden at 979 Old Woman Springs Road (Hwy 247), 8.2 miles N of Hwy 62 Comment
  UCR196998  Dichelostemma George K. Helmkamp, E. A. Helmkamp 2008-5-20 13478 Sierra Sierra Nevada Mountains Foothills, Henness Pass road, 3.4 miles northeast of Camptonville 1261 Comment
  UCD139227  Dichelostemma capitatum subsp. capitatum G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11655 Calaveras Eastern Sacramento Valley: about 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCR189471  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2007-3-17 11655 Calaveras Eastern Sacramento Valley, about 1 mile north of Burson on the road to south Comanche Reservoir 152 Comment
  UCR194875  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2007-5-26 12125 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of North San Juan 610 Comment
  UCR250888  Dichelostemma volubile George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20679 Calaveras Northern Sierra Nevada Mountains Foothills, Whiskey Slide Road, just east of West Murray Creek Road, c. 4.7 miles SE of Jesus Maria Road 677 Comment
  SD148231  Dieteria canescens var. canescens G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6823 Mono Virginia Lakes Road, 2.4 miles from U. S. 395. 2683 Comment
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Nov 9 2020
  UCR58156  Dipsacus sativus George K. Helmkamp 1989-8-6 s.n. San Luis Obispo Central Coast, Toro Creek Canyon Road, east of Hwy 101, just south of Cayucos 122 Comment
  SEINET251709 Image available Distichlis spicata G. K. Helmkamp, E. A. Helmkamp 2004-6-24 8691 Santa Barbara Central Coast: Ocean Park at Surf, NW of Lompoc (Surf7.5: near 34.41'2'N, -120.35.5'W) 6 Comment
  UCR158758  Distichlis spicata George K. Helmkamp, E. A. Helmkamp 2004-6-24 8691 Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 Comment
  CLARK-A1045-148  Ditaxis neomexicana George K. Helmkamp 1978-4-1 Riverside Deep Canyon Palm Desert 15'Q Comment
  CAS-BOT-BC140641  Dittrichia graveolens G. K. Helmkamp; E. A. Helmkamp 2009-10-30 15714 El Dorado Sierra Nevada Mountains Foothills: Country Club Drive 0.1 mile east of its junction with Bass Lake Road, between El Dorado Hills and Cameron Park 343 Comment
  CAS-BOT-BC229023  Dittrichia graveolens George K. Helmkamp; E. A. Helmkamp 2011-10-15 18427 San Joaquin San Joaquin Valley: along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  SD260177  Dittrichia graveolens George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22449 El Dorado Sierra Nevada Mountains Foothills: junction of Sand Ridge Road and CA-49, north of Plymouth. 267 Comment
  UCR235302  Dittrichia graveolens George K. Helmkamp, E. A. Helmkamp 2011-11-12 18452 El Dorado Southeastern Sacramento Valley, 2.0 miles west of Latrobe on South Shingle Road 168 Comment
  UCR161892  Dodecatheon clevelandii subsp. insulare George K. Helmkamp, E. A. Helmkamp 2005-3-14 9165 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 8.2 mi. NE of Los Olivos 488 Comment
  UCR87513  Dodecatheon conjugens George K. Helmkamp, E. A. Helmkamp 1993-5-4 87513 Modoc 25.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR15393  Dodecatheon hendersonii George K. Helmkamp 1977-6-5 s.n. San Bernardino San Bernardino Mtns, city of Big Bear 2104 Comment
  CAS-BOT-BC434185  Draba verna George K. Helmkamp; Elizabeth Helmkamp 2013-4-13 20314 Nevada Northern Sierra Nevada Mountains Foothills: Magnolia Road, 3.0 miles east of its junction with CA-49. 495 Comment
  UCR88210  Drymocallis lactea var. lactea George K. Helmkamp 1995-9-21 1- 12 B Mono Eastern Sierra Nevada Mountains, south edge of Lake Mary, south of Mammoth Lakes 2805 Comment
  UCR198485  Dryopteris arguta George K. Helmkamp, E. A. Helmkamp 2008-5-4 13388 A Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  UCR230623  Dudleya cymosa subsp. cymosa George K. Helmkamp, E. A. Helmkamp 2011-5-10 17246 Amador Northern Sierra Nevada Mountains Foothills, along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg. ) of town of Sutter Creek 412 Comment
  CAS-BOT-BC434948  Dysphania botrys George K. Helmkamp; Elizabeth Helmkamp 2013-9-7 22283 Amador Northern Sierra Nevada Mountains: on the south side of CA-88/Carson Pass Hwy, c. 0.3 mile west of the junction with Bear River Reservoir Road. 1934 Comment
  UCD98730  Dysphania botrys G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11041 El Dorado Northern Sierra Nevada Mountains. 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd. 2226 Comment
  UCR219071  Dysphania botrys George K. Helmkamp, E. A. Helmkamp 2009-9-15 15621 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.2 mile south of its junction with CA-88, 5.2 air mi. west of Bear River Reservoir 1622 Comment
  UCR233024  Dysphania botrys George K. Helmkamp, E. A. Helmkamp 2011-9-24 18327 El Dorado Northern Sierra Nevada Mountains, Loon Lake Road at the junction to the campground at the south end of the lake 1973 Comment
  UCR257931  Dysphania botrys George K. Helmkamp, Amy Barnes 2014-8-11 23021 El Dorado Norhern Sierra Nevada Mountains, Wentworth Springs Road at the junction with Eleven Pines Rd., east of Stumpy Meadow Reservoir 1481 Comment
  CAS-BOT-BC520341  Echinochloa colona George K. Helmkamp; E. A. Helmkamp 2012-9-21 19891 Calaveras Eastern San Joaquin Valley: Jenny Lind Road (Co. Rd J14), 0.2 mi S of jct with CA-26, WSW of Rancho Calaveras 99 Comment
  UCR252968  Echinochloa colona George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22146 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 11.3 miles northeast of the town of Sutter Creek 582 Comment
  SEINET2473441 Image available Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2007-1 12819 Amador Northern Sierra Nevada Mountains Foothills; along Hwy CA-49 at the south end of Plymouth 323 Comment
  UCD74334  Echinochloa crus-galli G. K. Helmkamp; E. A. Helmkamp 2007-8-26 12819 Amador Northern Sierra Nevada Mountains: along Hwy. CA-49 at the south end of Plymouth. 323 Comment
  UCR201570  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-14 14269 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  CAS-BOT-BC445579  Echinodorus berteroi George Helmkamp 1996-9-21 1190 San Luis Obispo Santa Margarita Lake. 396 Comment
  UCR131910  Ehrharta calycina George K. Helmkamp 2003-11-22 8227 San Luis Obispo Central Coast, base of Nipomo Mesa on unnamed road 0.1 mi SW of Halcyon Rd at the railroad crossing, just south of Arroyo Grande 15 Comment
  CLARK-A1045-451  Eleocharis montevidensis George K. Helmkamp 1979-6-20 San Bernardino San Bernardino Mountains 3 miles from dump above Baldwin Lake; Big Bear City 7.5'Q Comment
  RSA794912  Eleocharis pachycarpa George K. Helmkamp, E. A. Helmkamp 2011-7-12 17712 Calaveras Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  CLARK-A1045-1003  Eleocharis palustris George K. Helmkamp 1978-3-3 Orange Newport Beach wet ditch along Newport Back Bay; Newport Beach 7.5'Q Comment
  UCR201901  Eleusine tristachya George K. Helmkamp, E. A. Helmkamp 2008-10-9 14227 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, 1.1 miles north of the junction of CA-12 and CA-88, NE of Lodi 35 Comment
  SEINET3271574 Image available Elymus elongatus George K. Helmkamp, E. A. Helmkamp 2009-7-30 15310 Calaveras Sierra Nevada Mountains; Ottawa Drive, 0.1 mile south of its junction with CA-4, 1.2 miles northeast of Dorrington 1471 Comment
  SEINET3440054 Image available Elymus elymoides George K. Helmkamp, E. A. Helmkamp 2011-7-26 17862 Placer Northern Sierra Nevada Mountains: Emigrant Gap Road, 0.1 mi W of junction with US-80, 0.65 mi NE of Emigrant Gap 1590 Comment
  UCR250660  Elymus glaucus George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20700 Calaveras Northern Sierra Nevada Mountains Foothills, North side of Mokelumne River, west of Big Bar Road and the CA-49 bridge 198 Comment
  CAS-BOT-BC444025  Elymus glaucus subsp. glaucus George K. Helmkamp; Elizabeth Helmkamp 2013-7-31 22055 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 3.1 miles north of Ice House Resort, 0.18 mi. north of Jones Fork Power House Rd., 1.2 mi. NW of Ice House Reservoir. 468 Comment
  UCR218763  Elymus glaucus subsp. glaucus George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16317 El Dorado Sierra Nevada Mountains Foothills, about 0.1 mile south of Slug Gulch Road at a point 4.7 miles east of its junction with Perry Creek Road 1021 Comment
  UCR235506  Elymus glaucus var. glaucus George K. Helmkamp, E. A. Helmkamp 2012-5-15 18965 Calaveras Northern Sierra Nevada Mountains Foothills, along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas 387 Comment
  UCR237340  Elymus glaucus var. glaucus George K. Helmkamp, E. A. Helmkamp 2012-6-13 19156 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 2.6 miles north of its junction with CA-20 1088 Comment
  UCR101619  Encelia farinosa George K. Helmkamp, E. A. Helmkamp 1998-2-26 2788 San Bernardino Mojave Desert, NW side of Salt Spring Hills about 28 mi north of Baker; between the hills and Calif. Hwy 127 201 Comment
  UCR51301  Encelia frutescens George K. Helmkamp 1988-4-29 s.n. San Bernardino Eastern Mojave Desert, Fenner Valley between Hackberry Mtns & Vontrigger Hills, 11.3 mi NNW of Goffs 1100 Comment
  UCR89581  Encelia frutescens George K. Helmkamp 1994-3-10 42 9 Riverside Sonoran (Colorado) Desert, Indio Hills, canyon opening into Coachella Valley, 2 miles east of Thousand Palms on Ramon Road, and 1.3 miles north 122 Comment
  UCR123417  Ephedra californica George K. Helmkamp, E. A. Helmkamp 2000-4-25 5604 Kern Tehachapi Mountains, Oak Creek Rd., 1.5 mi east of Tehachapi Willow Springs Rd (about due west of Mojave and SE of Tehachapi. 1189 Comment
  UCR104858  Ephedra trifurca George K. Helmkamp, E. Helmkamp 1998-1-24 2569 Imperial Sonoran (Colorado) Desert, between Hwy I-8 & the All-American Canal across from the Brock Research Center (c. 3 mi. east of the jct of Calif. Hwy 98 with Hwy I-8) 46 Comment
  UCD106912  Epilobium G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10897 El Dorado Northern Sierra Nevada Mtns. Wright's Lake Road, 6.1 miles north of Hwy US-50; at the junction with the road from Ice House Reservoir. 2029 Comment
  UCR175702  Epilobium George K. Helmkamp, E. A. Helmkamp 2006-7-10 10937 El Dorado Northern Sierra Nevada Mountains, 1.1 miles west of Silver Creek along the road from Ice House Reservoir to Wright's Lake 2043 Comment
  UCR189444  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, E. A. Helmkamp 2007-8-4 12689 Alpine Northern Sierra Nevada Mountains, Woods Lake Road 0.8 mile south of its junction with CA-88; beside the Woods Creek crossing 2494 Comment
  UCR245550  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22238 Alpine Northern Sierra Nevada Mountains, Silver Creek, along CA-4, 5.0 miles west of its junction with CA-89 1927 Comment
  UCR257863  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, Amy Barnes 2012-8-12 19617 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  UCR258132  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19548 Amador Northern Sierra Nevada Mountains, West Lake Road along the west side of Silver Lake; 4.1 miles north of junction with Plasse Road 2247 Comment
  RSA0012026  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2011-9-1 18206 El Dorado Silver Fork Road, 3.1 miles south of its junction with US-50 in Kyburz 1447 Comment
  SBBG92171  Epilobium brachycarpum G. K. Helmkamp 1989-8-1 Mono US Hwy 395, just S of Devil's Gate Summit 2255 Comment
  SD236342  Epilobium brachycarpum G. K Helmkamp, E. A. Helmkamp 2008-10-2 14190 Sacramento Sacramento Valley: Latrobe Road, 4.9 miles west of Latrobe and just east of the El Dorado Co. line. 152 Comment
  UCR132279  Epilobium brachycarpum George K. Helmkamp 2003-8-31 8118 Santa Barbara Central Coast, Casmalia Hills, 4 mi west of Calif. Hwy 1 (south of Guadalupe) along Brown Road 183 Comment
  UCR171329  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2005-10-8 9999 El Dorado Northern Sierra Nevada Foothills, SE off Calif. Highway 49 at junction of Patterson Drive and Pleasant Valley Road, SW of Diamond Springs 537 Comment
  UCR179394  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2006-9-20 11437 El Dorado Northern Sierra Nevada Mountains Foothills, West Meadow Road 0.3 mile west of its junction with Ice House Road 1050 Comment
  UCR219102  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2009-9-5 15602 Butte Sacramento Valley, Honcut, on Palermo-Honcut Highway, 0.1 mile north of Lower Honcut Road 35 Comment
  UCR219639  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2009-10-9 15668 El Dorado Sierra Nevada Mountains Foothills, along Snows Road, 0.9 mile south of Carson Road in Camino. 0.3 mi. south of Hwy 50 933 Comment
  UCR230089  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-20 17052 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  UCR253601  Epilobium brachycarpum George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20113 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  CLARK-A1045-1166  Epilobium brevistylum George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCD105470  Epilobium canum subsp. latifolium G. K. Helmkamp; E. A. Helmkamp 2007-9-11 12942 El Dorado Northern Sierra Nevada Mountains. Along Wright's Lake Road, 3.2 miles N of its junction with US-50. 1991 Comment
  UCR140990  Epilobium ciliatum George K. Helmkamp, E. A. Helmkamp 1998-8-10 4277 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR209041  Epilobium ciliatum George K. Helmkamp, E. A. Helmkamp 2009-8-19 15485 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  UCR253558  Epilobium ciliatum George K. Helmkamp, Amy Barnes 2013-9-23 22297 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road (beside Angel's Creek), 0.6 mile northeast of its junction with CA-4 974 Comment
  UCR134430  Epilobium ciliatum subsp. ciliatum George K. Helmkamp 2003-9-19 8150 A San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR104828  Epilobium ciliatum subsp. glandulosum George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2108 Mendocino State Hwy 128, 1.5 mi. SE of Boonville, in Anderson Valley 152 Comment
  UCR91830  Epilobium ciliatum subsp. watsonii George K. Helmkamp 1996-5-25 1066 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  UCD106291  Epilobium densiflorum G. K. Helmkamp; E. A. Helmkamp 2006-10-27 11577 El Dorado Northern Sierra Nevada Mountains. City of Placerville. Along Spring Street, 0.1 mile N of its junction with CA-49. 573 Comment
  UCR197624  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2008-6-5 13601 El Dorado Sierra Nevada Mountains Foothills, Forbay Road at crossing of the South Fork American River 595 Comment
  SEINET4178826 Image available Epilobium glaberrimum George K. Helmkamp, E. A. Helmkamp 2010-8-14 16794 Placer Northerns Sierra Nevada Mountains: American Hill Road (Forest Route 13), 4.7 miles south of it's junction with Foresthill Road and just south of a creek crossing.. 1551 Comment
  CLARK-A1045-1142  Equisetum funstonii George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCR202563  Equisetum laevigatum George K. Helmkamp, E. A. Helmkamp 2008-9-22 14158 Alpine Northern Sierra Nevada Mountains, along CA-89. 0.1 mile north of Markleeville 1686 Comment
  SEINET2473440 Image available Eragrostis mexicana subsp. virescens George K. Helmkamp, E. A. Helmkamp 2007-1 12853 El Dorado Foothills, northern Sierra Nevada Mountains; Prospector Road, 0.1 mile north of Marshall Road near Indian Creek 2768 Comment
  UCD97933  Eremogone kingii var. glabrescens G. K. Helmkamp; E. A. Helmkamp 2006-8-30 11299 Alpine Northern Sierra Nevada Mountains; Woods Lake, south of CA-88 and generally SE of Caples Lake. Besides Woods Creek. 2521 Comment
  UCD170704  Eremothera refracta G. K. Helmkamp; E. A. Helmkamp 1998-2-18 2739 Riverside Chuckwalla Mountains: Graham Pass Road, 10.6 miles SSW of Chuckwalla Valley Road. 448 Comment
  UCR58302  Eriastrum sapphirinum George K. Helmkamp 1989-10-7 s.n. Riverside San Jacinto Mtns, N slope of Thomas Mtn, 1 mi. SW of Hwy 74 on Thomas Mtn Road 1500 Comment
  UCR121738  Eriastrum wilcoxii George K. Helmkamp, E. A. Helmkamp 2000-7-19 5938 Mono Sierra Nevada Mountains, McGee Creek Rd about 4 mi SW of US-395 2470 Comment
  UCR132170  Eriastrum wilcoxii George K. Helmkamp, E. A. Helmkamp 1993-7-28 184 Mono Sierra Nevada Mountains, Long Valley mesa at the junction of Owens River Road and Lake Crowley 2104 Comment
  UCR14516  Eriastrum wilcoxii George K. Helmkamp 1974-5-4 s.n. Inyo Owens Valley, Owens River, Pleasant Valley 1372 Comment
  UCR95905  Eriastrum wilcoxii George K. Helmkamp 1996-10-17 1259 Mono Owens Valley, 0.2 mi. south of Benton Hot Springs, beside Calif. Hwy 120 1745 Comment
  UCR67022  Ericameria arborescens George K. Helmkamp 1990-9-3 s.n. San Luis Obispo Central Coast, south end of Morro Bay, southwest of Baywood Park 15 Comment
  UCR118335  Ericameria ericoides George K. Helmkamp, E. A. Helmkamp 2000-9-1 5952 San Luis Obispo Los Osos, c. 0.5 miles NW of Hazard Cyn., between Howard St. and sand dunes 6 Comment
  UCR25530  Ericameria laricifolia George K. Helmkamp 1981-10-8 s.n. San Bernardino eastern Mojave Desert, Providence Mtns, Mitchell Caverns, along hiking trail 0.5 mi. west of park headquarters. 1220 Comment
  RSA613935  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 1998-4-8 3213 San Luis Obispo Elkhorn Grade Rd, 6.3 mi. NW of jct with CA hwy 33 (roughly W of Maricopa). 549 Comment
  UCR107320  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 1998-5-14 3648 Monterey Coast Range, Peachtree Valley, along Calif. Hwy 198, 6.2 mi. west of the Fresno/Monterey County lines. 503 Comment
  UCR122626  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 2002-4-23 7573 San Benito Inner South Coast Ranges, County Hwy J-1(Panoche Rd) 15.6 mi SE of its junction with CA Hwy 25; along Tres Pinos Creek 671 Comment
  UCR123423  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 2000-4-25 5595 Kern Tehachapi Mountains, Tehachapi Valley SE of Tehachapi Willow Springs Rd, 2.3 mi north of Oak Creek Road 1524 Comment
  UCR178763  Ericameria parryi George K. Helmkamp, E. A. Helmkamp 2006-9-12 11399 Alpine Northern Sierra Nevada Mountains, west end of Caples Lake at a dam; alongside CA Hwy 88 2335 Comment
  UCR116022  Ericameria parryi var. nevadensis George K. Helmkamp, E. A. Helmkamp 2000-7-18 5873 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  UCR190639  Ericameria parryi var. nevadensis George K. Helmkamp, E. A. Helmkamp 2007-9-15 12969 El Dorado Northern Sierra Nevada Mountains Foothills, Ice House Road 4.3 miles north of its junction with US-50 1393 Comment
  UCR201744  Erigeron George K. Helmkamp, E. A. Helmkamp 2008-8-1 13946 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 2.2 miles south of the entrance to Wright's Lake 2070 Comment
  UCR177231  Erigeron breweri George K. Helmkamp, E. A. Helmkamp 2005-8-9 9808 El Dorado Northern Sierra Nevada Mtns., El Dorado National Forest; west of Lake Tahoe; Ice House Road, 1.9 miles N of Wentworth Rd (turnoff to Stump Meadows) 1649 Comment
  CAS-BOT-BC294542  Erigeron breweri var. breweri G. K. Helmkamp; E. A. Helmkamp 2008-8-1 13958 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42 at Silver Creek, 0.2 mile west of the junction with Wright's Lake Road 2021 Comment
  UCR59472  Erigeron breweri var. breweri George K. Helmkamp 1989-7-31 s.n. Mono Sierra Nevada Mtns, just south of Mammoth Village [in Mammoth Lakes] and at the edge of Snow Creek [Golf Course] 2439 Comment
  UCR201921  Erigeron canadensis George K. Helmkamp, E. A. Helmkamp 2008-10-9 14234 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, 1.1 miles north of the junction of CA-12 and CA-88, NE of Lodi 35 Comment
  UCR235295  Erigeron canadensis George K. Helmkamp, E. A. Helmkamp 2011-11-21 18475 San Joaquin Northeastern San Joaquin Valley, along Johnson Road, 0.8 mile south of its junction with CA-12, NE of Lockeford, SW of Camanche Reservoir 53 Comment
  UCD131838  Erigeron coulteri G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10965 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCR129546  Erigeron divergens George K. Helmkamp, E. A. Helmkamp 2001-7-8 6817 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCR159846  Erigeron foliosus var. foliosus George K. Helmkamp, E. A. Helmkamp 2005-6-12 9639 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  RSA794537  Erigeron foliosus var. hartwegii George K. Helmkamp, E. A. Helmkamp 2011-7-17 17751 Nevada You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95deg.) of Peardale 686 Comment
  UCR193335  Erigeron foliosus var. hartwegii George K. Helmkamp, E. A. Helmkamp 2007-5-30 12194 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 15 miles east of its junction with Forest Hill Road in Foresthill, south of site of Bake Oven 915 Comment
  UCR218122  Erigeron foliosus var. hartwegii George K. Helmkamp, E. A. Helmkamp 2010-6-26 16391 Placer Sierra Nevada Mountains Foothills, Yankee Jim's Road in Bunch Canyon, 0.5 mile southeast of its junction with Canyon Way 591 Comment
  RSA781312  Erigeron lassenianus var. lassenianus George K. Helmkamp, E. A. Helmkamp 2009-7-22 15272 El Dorado Wrights Lake Road, 1.2 miles south of Wrights Lake 2073 Comment
  UCR175722  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2006-7-31 11047 El Dorado Northern Sierra Nevada Mountains, along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50 2049 Comment
  UCR177875  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2006-8-7 11198 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring; Tragedy Spring Road, 0.3 mile north of Calif. Hwy 88 2424 Comment
  UCR190330  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2007-8-1 12656 Nevada Northern Sierra Nevada Mountains, Soda Lake Road in the vicinity of Lake Van Norden, 0.2 mile south of Donner Pass Road 2073 Comment
  UCR229438  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18070 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  UCR250157  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20937 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.8 mile north of Mormon Emigrant Trail and near Jim Quinn Spring, N of Carson Pass Hwy 2116 Comment
  UCR160752  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2005-6-5 9523 Monterey Outer Central Coast Ranges; Santa Lucia Range, 5.0 mi east of Calif. Hwy 1 along Los Burros Road 826 Comment
  UCR194928  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2007-5-22 12043 El Dorado Northern Sierra Nevada Mountains Foothills, Mormon Emigrant Trail, 5.2 miles east of its junction with Sly Park Road at Jenkinson's Lake 1372 Comment
  UCR196790  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2008-6-5 13592 El Dorado Sierra Nevada Mountains, Forbay Road, 5.3 miles north of its junction with Pony Express Trail in Pollock Pines 947 Comment
  UCR253227  Eriodictyon californicum George K. Helmkamp, Amy Barnes 2014-4-23 22815 Placer Sierra Nevada Mountains Foothills, Spring Garden Road, at the north side of its junction with Foresthill Road, 8.4 km west of Foresthill 720 Comment
  CLARK-A1045-80  Eriodictyon crassifolium George K. Helmkamp 1977-4-30 Riverside San Jacinto Mountains Lake Fulmor 7.5'Q Comment
  UCR159849  Eriodictyon tomentosum George K. Helmkamp, E. A. Helmkamp 2005-6-12 9642 San Luis Obispo South Central Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 6.7 miles east of Santa Margarita 485 Comment
  RSA643799  Eriogonum George K. Helmkamp 1996-10-17 1255 Mono 1.2 mile NNE of Benton Hot Springs, beside highway CA-120 1799 Comment
  UCR132169  Eriogonum ampullaceum George K. Helmkamp, E. A. Helmkamp 1993-7-28 182 Mono Sierra Nevada Mountains, Long Valley mesa at the junction of Owens River Road and Lake Crowley 2104 Comment
  UCR15443  Eriogonum baileyi var. baileyi George K. Helmkamp 1977-9-1 s.n. El Dorado Sierra Nevada Mtns., Grass Lake at Luther Pass 2356 Comment
  UCR79513  Eriogonum baileyi var. baileyi George K. Helmkamp 1993-9-22 33- 06 San Bernardino San Bernardino Mtns./Mojave Desert, 5.9 mi up Burns Canyon from crossing of Pioneertown and Pipes Canyon Roads 1585 Comment
  UCR89430  Eriogonum baileyi var. baileyi George K. Helmkamp 1990-8-2 s.n. Mono Sierra Nevada Mtns, between Mammoth and Lake Mary 2591 Comment
  UCR103817  Eriogonum brachyanthum George K. Helmkamp, E. A. Helmkamp 1997-9-10 2346 Mono Eastern Sierra/ Great Basin, River Spring Lakes, 3.1 mi. NE of Calif. Hwy 120 on River Springs Rd 1979 Comment
  UCR15186  Eriogonum brachyanthum George K. Helmkamp 1976-10-24 s.n. Inyo Roadside, US 395, in a lava bead north of Manzanar 1189 Comment
  CLARK-A1045-937  Eriogonum davidsonii George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5' Q Comment
  UCR122586  Eriogonum davidsonii George K. Helmkamp 1995-11-16 100 Riverside San Jacinto Mtns, Along Calif. Hwy 243, 0.25-0.50 mi south of Bay Tree Spring (about 0.9 mi north of Lake Fulmor) 1616 Comment
  SD143789  Eriogonum deflexum var. deflexum G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2899 Imperial 7 miles north of Winterhaven, on Picacho Road and 1.7 miles east on powerline road, Desert pavement with small sandy washes. (IPB 10/07) 198 Comment
  UCR146827  Eriogonum elongatum George K. Helmkamp, E. A. Helmkamp 2004-9-23 8802 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd., 12.5 mi NE of Los Olivos and near the turnoff to Figueroa Mountain 1037 Comment
  SD225069  Eriogonum gracile var. gracile G. K. Helmkamp 1997-9-29 2448 Inyo Sierra Nevada Mtns; Onion Valley Rd, 7.9 mi W of US-395 from Independence; 2158 Comment
  CLARK-A1045-1027  Eriogonum incanum George K. Helmkamp 1977-7-3 Mono Sierra Nevada road to the Lake; rock ledge; ; Mount Dana 7.5' Q 2895 Comment
  CLARK-A1045-854  Eriogonum inflatum George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  UCR67383  Eriogonum microthecum var. ambiguum George K. Helmkamp 1990-9-23 D- 9 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UCR118185  Eriogonum molestum George K. Helmkamp, E. A. Helmkamp 1998-6-27 4073 Riverside San Jacinto Mtns., Garner Valley, along Hwy 74 at Morris Ranch Rd. 1372 Comment
  UCR122585  Eriogonum molestum George K. Helmkamp 1995-11-16 101 Riverside San Jacinto Mtns, Along Calif. Hwy 243, 0.25-0.50 mi south of Bay Tree Spring (about 0.9 mi north of Lake Fulmor) 1616 Comment
  CLARK-A1045-687  Eriogonum nidularium George K. Helmkamp 1978-5-6 San Bernardino Mojave Desert Kingston Road; Clark Mt 15'Q Comment
  RSA492827  Eriogonum nidularium George K. Helmkamp 1988-4-29 s.n. San Bernardino Eastern Mojave Desert Fenner Valley between Hackberry Mtns and Vontrigger Hills, 11.3 mi NNW of Goffs. 1100 Comment
  SBBG129027  Eriogonum nudum var. deductum G. K. Helmkamp, E. A. Helmkamp 2013-8-14 22245 Alpine CA-4, 12.4 mi SW of the CA-89 jct and just N of Kinney Reservoir 2540 Comment
  SEINET3246086  Eriogonum nudum var. deductum G. K. Helmkamp, E. A. Helmkamp 2007-1 12636 Placer Northern Sierra Nevada Mountains: Southeast end of Cisco Grove; along local road just before it passes under Interstate-80. 1743 Comment
  SEINET4560539  Eriogonum nudum var. deductum George K. Helmkamp, Elizabeth Helmkamp 2013-1 22245 Alpine Northern Sierra Nevada Mountains: along CA-4, 12.4 miles southwest of the CA-89 junction and just north of Kinney Reservoir. 2540 Comment
  UCR103539  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 1997-9-12 2407 Mono Along Calif. Hwy 120, 7.5 mi east of US Hwy 395 2125 Comment
  UCR175733  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2006-7-31 11063 El Dorado Northern Sierra Nevada Mountains, along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50 2049 Comment
  UCR189420  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2007-8-16 12749 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail 2172 Comment
  UCR189613  Eriogonum nudum var. deductum George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12365 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 13.2 miles ESE of its junction with Sly Park Road at Jenkinson Lake 1976 Comment
  UCR231841  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2010-8-14 16788 Placer Northern Sierra Nevada Mountains, American Hill Road (Forest Route 13), 4.7 miles south of its junction with Foresthill Road and just south of a creek crossing 1552 Comment
  UCR258371  Eriogonum nudum var. deductum George K. Helmkamp, Amy Barnes 2014-8-11 22979 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 Comment
  RSA714092  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2005-10-1 9993 Placer Northern Sierra Nevada Mts.: NW of Lake Tahoe; Junction of Bear Creek Road and Big John Drive (ca. 2.2 miles west of CA Highway 89 and just south of Alpine Meadows Road) 2015 Comment
  UCR230643  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17815 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR230738  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2010-9-30 16982 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 4.3 miles north of its junction with Wentworth Springs Road, 0.65 mi. SSW of Loon Lake 1976 Comment
  UCD100546  Eriogonum nudum var. oblongifolium G. K. Helmkamp; E. A. Helmkamp 2007-9-1 12860 El Dorado northern Sierra Nevada Mountains, Happy Valley cutoff road 0.2 mile southeast of its junction with CA-E-16 (generally northeast of Somerset.) 607 Comment
  UCR218124  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2010-6-26 16393 Placer Sierra Nevada Mountains Foothills, Yankee Jim's Road in Bunch Canyon, 0.5 mile southeast of its junction with Canyon Way 591 Comment
  UCR229533  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2011-7-26 17860 Placer Northern Sierra Nevada Mountains, Emigrant Gap Road, 0.1 mile west of its junction with US-80, 0.65 mi. NE (65 deg. ) of Emigrant Gap 1590 Comment
  UCSB70078  Eriogonum nudum var. oblongifolium Helmkamp, G.; Helmkamp, E. 2007-9-14 Placer Foothills, northern Sierra Nevada Mountains: along Mosquito Ridge Road 6 miles east of Foresthill (Foresthill 7.5' Q) 610 Comment
  UCR134477  Eriogonum nudum var. westonii George K. Helmkamp, E. A. Helmkamp 1998-8-10 4262 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR209767  Eriogonum roseum George K. Helmkamp, E. A. Helmkamp 2009-8-14 15476 El Dorado Sierra Nevada Mountains Foothills, junction of Sand Ridge Road and Cutaway Lane, 2.0 miles west of Bucks Bar Road 642 Comment
  UCR210048  Eriogonum roseum George K. Helmkamp, E. A. Helmkamp 2009-8-14 15460 El Dorado Foothills, northern Sierra Nevada Mountains, Bucks Bar Road, 3.9 miles south of Pleasant Valley Road 625 Comment
  SEINET4691464  Eriogonum spergulinum var. reddingianum George K. Helmkamp, E. A. Helmkamp 2011-1 18098 Alpine Northern Sierra Nevada Mountains: Blue Lakes Road, 6.6 miles south of its junction with CA-88. 2296 Comment
  UCR115851  Eriogonum spergulinum var. reddingianum George K. Helmkamp, E. A. Helmkamp 2000-7-18 5865 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  RSA614560  Eriogonum thomasii George K. Helmkamp 1998-3-30 3040 San Bernardino Vicinity of Twentynine Palms; Encelia Rd, 1.0 mi. N of CA hwy 62. 793 Comment
  SEINET2042326 Image available Eriogonum thomasii George K. Helmkamp, E. A. Helmkamp 2001-3-31 6354 San Bernardino NE side of jct. Of US-95 & I-40. 366 Comment
  UCR104038  Eriogonum thomasii George K. Helmkamp, E. A. Helmkamp 1998-2-5 2674 Riverside Little San Bernardino Mtns., 3.2 mi. north of junction of Thousand Palms Canyon Road and Dillon Road. 457 Comment
  CLARK-A1045-38  Eriogonum trichopes George K. Helmkamp 1977-4-24 Inyo Death Valley Comment
  CLARK-A1045-757  Eriogonum trichopes George K. Helmkamp 1977-5-14 San Bernardino Mojave Desert blackbrush area south of Interstate Highway 15; ; Mescal Range 15'Q 1402 Comment
  RSA567422  Eriogonum umbellatum subsp. munzii George K. Helmkamp 1993-9-22 35 -18 San Bernardino Steep canyon side with Pinon Pine. 14.4 mi. up Burns Canyon from junction of Pioneer Town and Pipes Cyn Rds. 2073 Comment
  UCD101444  Eriogonum umbellatum var. furcosum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11023 El Dorado Northern Sierra Nevada Mountains, North Truckee River Road, 1.4 miles north of CA-50 and ca. 6 miles south of Lake Tahoe. 2009 Comment
  UCR196987  Eriogonum umbellatum var. nevadense George K. Helmkamp, E. A. Helmkamp 2008-7-22 13867 Alpine Eastern Sierra Nevada Mountains, Blue Lake Road just southeast of its junction with CA-88 2180 Comment
  UCR206598  Eriogonum umbellatum var. polyanthum George K. Helmkamp, Ann Kerchner 2009-7-25 15295 Alpine Sierra Nevada Mountains, Blue Lakes Road, 8.5 miles south of its junction with CA-88 2491 Comment
  RSA0093526  Eriogonum vimineum George K. Helmkamp, E. A. Helmkamp 2006-9-12 11387 Alpine Northern Sierra Nevada Mountains. along Calif. Hwy 89, 1.5 miles east of the El Dorado County line, general vicinity of Luther Pass. 2186 Comment
  RSA667118  Eriogonum wrightii var. subscaposum George K. Helmkamp, E. A. Helmkamp 1997-9-9 2304 Alpine Leviathan Lookout Rd at the S and W sides of Leviathan Peak, NW of Monitor Pass. (1) 2683 Comment
  RSA750702  Eriogonum wrightii var. subscaposum George K. Helmkamp, E. A. Helmkamp 2008-8-20 14023 Placer Donner Pass Road on the west side of Donner Pass and east of Norden. 2149 Comment
  UCR122311  Eriogonum wrightii var. subscaposum George K. Helmkamp, E. A. Helmkamp 1997-9-9 2304 Alpine Sierra Nevada Mountains, Leviathan Lookout Road at the S and W sides of Leviathan Peak, NW of Monitor Pass 2683 Comment
  UCR209012  Eriogonum wrightii var. subscaposum George K. Helmkamp, E. A. Helmkamp 2009-8-19 15498 El Dorado Sierra Nevada Mountains, along Ice House Road at SW shore of Loon Lake, 2.6 miles south of its end on the north side of the lake 1973 Comment
  UCR103967  Eriophyllum confertiflorum George K. Helmkamp 1997-6-22 2077 San Luis Obispo Central Coast, South end of Montana de Oro State Park 15 Comment
  UCR130635  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 1999-4-15 4656 San Diego Peninsular Ranges, c. 5 mi NE of Alpine. Old Viejas Grade at the E side of Viejas Mtn., 0.6 mi east of the Viejas Indian Reservation 854 Comment
  RSA755891  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-20 14755 Colusa Along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  SBBG129059  Eriophyllum lanatum var. achilleoides G. K. Helmkamp, E. A. Helmkamp 2013-6-5 20793 Sierra CA-49, 1.9 mi NE of the Yuba County line, NE of Camptonville 796 Comment
  UCR207846  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2009-5-14 14708 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCR257064  Eriophyllum lanatum var. achilleoides George K. Helmkamp, Mary Alice Barnes 2013-5-17 20620 Calaveras Northern Sierra Nevada Mountains Foothills, Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs 279 Comment
  UCR194700  Eriophyllum lanatum var. croceum George K. Helmkamp, E. A. Helmkamp 2007-5-30 12205 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 17 miles east of its junction with Forest Hill Road in Foresthill, NW of Ditch Camp 963 Comment
  UCR251252  Eriophyllum lanatum var. croceum George K. Helmkamp, E. A. Helmkamp 2012-7-6 19331 El Dorado Northern Sierra Nevada Mountains, Ice House Road at Ice House village, 10.5 miles north of its junction with US-50 1677 Comment
  UCR256971  Eriophyllum lanatum var. croceum George K. Helmkamp 2014-5-17 22892 Calaveras Sierra Nevada Mountains Foothills, between Sandy Gulch and Glencoe along CA-26, 0.1 mile north of the bridge over South Fork Mokelumne River 608 Comment
  UCR196863  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, E. A. Helmkamp 2008-6-3 13563 El Dorado Sierra Nevada Mountains, Pony Express Trail, 0.8 mile east of Sly Park Road (Pollock Pines) and parallel to US-50 1213 Comment
  UCR242813  Eriophyllum lanatum var. integrifolium George K. Helmkamp, E. A. Helmkamp 2010-9-1 16905 Amador Northern Sierra Nevada Mountains, Dufrene Road 0.7 mile east of its junction with CA-88, north of Lower Bear River Reservoir 2044 Comment
  UCR130249  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2001-4-27 6504 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  UCR188175  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2007-4-30 11891 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR233123A  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2011-5-21 17328 Calaveras Northern Sierra Nevada Mountains Foothills, Ridge Road, 1.9 rd. miles southeast of CA-26, 1.8 air mi. southeast (130 deg. ) of Glencoe 863 Comment
  UCR233139B  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2010-3-26 15775 Amador Eastern San Joaquin Valley/ Sierra Nevada Foothills, low foothills along CA-16, 6.8 miles west of Plymouth near Forest Home Rd. 177 Comment
  UCR253514  Erodium botrys George K. Helmkamp 2014-4-5 22664 Amador Sierra Nevada Foothills, junction of Tonzi Road and CA-124, NE of Ione 201 Comment
  SD234416  Erodium cicutarium G. K. Helmkamp, E. A. Helmkamp 2006-3-19 10089 Amador Northern Sierra Nevada Foothills: Along CA Highway 49 just S of Plymouth (Amador City 7.5' Q) 323 Comment
  SEINET13203094 Image available Erodium moschatum George K. Helmkamp, Amy Barnes 2014-1 22591 Sutter Sacramento Valley: aling CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5' Q.) 13 Comment
  UCR122645  Erodium texanum George K. Helmkamp, E. A. Helmkamp 1998-3-16 2845 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  UCR160291  Eruca vesicaria subsp. sativa George K. Helmkamp 2004-5-1 8555 San Luis Obispo Central Coast, south of Arroyo Grande along Calif. Hwy 1, south of Callender Rd beside Conoco-Phillips refinery 30 Comment
  UCR256984  Erysimum capitatum var. capitatum George K. Helmkamp 2014-5-17 22894 Calaveras Sierra Nevada Mountains Foothills, between Sandy Gulch and Glencoe along CA-26, 0.1 mile north of the bridge over South Fork Mokelumne River 608 Comment
  SD234525  Erythranthe guttata G. K. Helmkamp, E. A. Helmkamp 2007-5-30 12183 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 13.5 miles east of its junction with Forest Hill Road in Foresthill, between Mosquito Ridge Lookout and North Fork of Middle Fork American River. 800 Comment
  SD237619  Erythranthe lewisii G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15275 El Dorado Sierra Nevada Mountains Forestry Route 42, 1.6 miles wet of its junction with Wrights Lake Road (Kyburz 7.5'Q) 1851 Comment
  CAS-BOT-BC173163  Erythranthe microphylla G. K. Helmkamp; E. A. Helmkamp 2008-4-25 13330 Calaveras Sierra Nevada Mountains Foothills: along Bear Creek Road 0.4 mile southeast of its junction with Meadow Brook Road, SE of Georgetown 747 Comment
  SD212734  Erythranthe moschata G. K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9873 El Dorado Silver Fork, 2.1 miles west of Kyburz along US Highway 50. 1203 Comment
  UCR206723  Eschscholzia George K. Helmkamp, E. A. Helmkamp 2009-3-17 14393 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 7.0 miles south of the junction with CA-20; just north of the Yolo County line 194 Comment
  CAS-BOT-BC520357  Eschscholzia caespitosa George K. Helmkamp; Mary Alice Barnes 2013-5-17 20633 Calaveras Northern Sierra Nevada Mountains Foothills: Poloma Rd at its jct with Cosgrove Creek Rd, 3 mi NE (30 deg. ) of Valley Springs 278 Comment
  UCD95252  Eschscholzia caespitosa G. K. Helmkamp; E. A. Helmkamp 2004-10-1 8828 San Luis Obispo San Luis Obispo County: Central Coast; Outer South Coast Range; 3.4 miles east of Lopez Lake along Hi Mountain Road and beside Arroyo Grande Creek. 171 Comment
  UCR122463  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 1998-5-20 4003 San Luis Obispo Central Coast, Irish Hills, 3.1 miles SE of Los Osos Valley Rd on Clark Valley Rd., SE of Los Osos 351 Comment
  CAS-BOT-BC403433  Eschscholzia californica G. K. Helmkamp; E. A. Helmkamp 1999-4-18 4701 San Diego Between Lake Henshaw & Matagual Valley: Barrett Hill Rd off of Hwy-79, ca 6.5 mi SW of Warner Hot Springs. 838 Comment
  SEINET3411987 Image available Eschscholzia californica George K. Helmkamp, E. A. Helmkamp 2012-3-31 18645 Placer Sacramento Valley: along CA-193, 0.1 mile W of its junction with Sierra College Blvd. 88 Comment
  UCR134453  Eschscholzia californica George K. Helmkamp 2003-9-26 8181 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  SD225053  Eschscholzia minutiflora G. K. Helmkamp 1998-4-4 3133 Riverside Southern Mojave Deset: junction of CA hwy 62 (Twentynine Palms hwy) & CA hwy 177 (Desert Center- Rice Rd.) 474 Comment
  UCR102987  Eschscholzia minutiflora George K. Helmkamp, E. A. Helmkamp 1998-3-16 2834 San Bernardino Mojave Desert, 50 ft. north of the boundary of Joshua Tree National Park at the S end of Sunkist Rd (E of town of Joshua Tree) 884 Comment
  UCR176428  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2006-8-7 11159 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 21.0 miles east of its junction with Sly Park Road 2174 Comment
  SD148144  Eucrypta chrysanthemifolia var. chrysanthemifolia G. K. Helmkamp, E. A. Helmkamp 2001-5-2 6620 San Luis Obispo La Panza Range: CA-58, 11.2 miles east of Santa Margarita. 487 Comment
  UCR161225  Eucrypta chrysanthemifolia var. chrysanthemifolia George K. Helmkamp, E. A. Helmkamp 2005-3-5 9038 A San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness N of Lopez Lake, Upper Lopez Canyon Road, 5.5 mi N of jct with Lopez Road 335 Comment
  CLARK-A1045-513  Euphorbia albomarginata George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north of Baldwin Lake and State Highway 38; sagebrush-juniper area; ; Big Bear City 7.5' Q 2133 Comment
  UCR133224  Euphorbia albomarginata George K. Helmkamp 1993-9-12 22- 04 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  UCR219042  Euphorbia maculata George K. Helmkamp, E. A. Helmkamp 2009-8-28 15538 Sacramento Northern Sacramento Valley, along Latrobe Road, 1.1 miles west of the El Dorado County line, 3 mi. NE (36 deg. ) of Rancho Murieta 140 Comment
  UCR123375  Euphorbia nutans George K. Helmkamp, E. A. Helmkamp 1999-6-29 5052 Placer Sierra Nevada Foothills, corner of Dry Creek Rd & Bowman Rd, near Nielsburg, 3 mi NE of Auburn beside I-80 & 1.5 NW of North Fork Lake on American River 457 Comment
  UCR259878  Euphorbia nutans George K. Helmkamp, Elizabeth Helmkamp 2013-11-2 22463 Placer Sacramento Valley, Highway CA-193 (Lincoln-Newcastle Hwy) at the junction with Gold Hill Road, 3.8 miles northwest of US-80 114 Comment
  SEINET998807  Euphorbia nutans G. K. Helmkamp, E. A. Helmkamp 2006-1 11566 Amador Central Valley/Northern Sierra Nevada Foothills: along CA-16 0.2 miles east of Waits Station, southwest of Plymouth (Irish Hill 7.5') 305 Comment
  UCR173998  Euphorbia oblongata George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10807 Amador Northern Sierra Nevada foothills, northbound along Calif. Hwy 26, 0.6 mile past the North Fork of Mokelumne River 732 Comment
  UCR241379  Euphorbia oblongata George K. Helmkamp, E. A. Helmkamp 2012-9-20 19870 Calaveras Northern Sierra Nevada Mountains Foothills, trailhead parking area at the west side of CA-49, south of the bridge over the Mokelumne River, NW of Mokelumne Hill 564 Comment
  UCR50973  Euphorbia pediculifera George K. Helmkamp 1988-2-28 s.n. Imperial Sonoran (Colorado) Desert, at end of a dirt road c. 2 miles WSW of Crucifixion Thorn Natural Area, SE of Ocotillo and SW of Hwy 98 153 Comment
  UCR134697  Euphorbia peplus George K. Helmkamp 2003-9-17 8141 San Luis Obispo Central Coast, 765 Mesa View Dr., 0.2 mi south of Halcyon Rd in the Arroyo Grande area 46 Comment
  UCR219120  Euphorbia serpillifolia subsp. hirtula George K. Helmkamp, E. A. Helmkamp 2009-8-30 15549 Sutter Sacramento Valley, along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus 8 Comment
  UCR45125  Euphorbia setiloba George K. Helmkamp 1986-10-18 s.n. San Bernardino Sonoran (Colorado) Desert, Chemehuevi Wash, south of Lake Havasu Rd, 12.4 mi. SE of intersection w/ Hwy 95 274 Comment
  CLARK-A1045-612  Eurotia lanata George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  SEINET3260380 Image available Eurybia integrifolia George K. Helmkamp, E. A. Helmkamp 2008-8-8 14006 Alpine Northern Sierra Nevada Mountains; along Blue Lake Road, 9.2 miles south of its junction with CA-88. 2512 Comment
  UCR174195  Festuca arundinacea George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10330 Amador Northern Sierra Nevada foothills, Grass Valley Creek, 1.2 miles east of Pine Grove along Calif. Hwy 88 762 Comment
  UCR251244  Festuca arundinacea George K. Helmkamp, E. A. Helmkamp 2012-7-6 19357 El Dorado Northern Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50 2078 Comment
  UCR234013  Festuca idahoensis George K. Helmkamp, E. A. Helmkamp 2011-7-7 17655 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  SEINET3821903 Image available Festuca microstachys George K. Helmkamp, E. A. Helmkamp 2012-5-18 19001 El Dorado Northern Sierra Nevada Mountains, junction of Bonnetti Road (Capps Crossing Rd.) and Mormon Emigrant Trail, east of Jenkinson Lake (Sly Park 7.5' Q) 1260 Comment
  UCR187302  Festuca myuros var. hirsuta George K. Helmkamp, E. A. Helmkamp 2007-4-5 11745 Amador Foothills, Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City 309 Comment
  UCR189482  Festuca myuros var. hirsuta George K. Helmkamp, E. A. Helmkamp 2007-3-17 11638 Amador Sacramento Valley/ Sierra Nevada Foothills, Hwy CA-24, 3.2 mi southwest of Plymouth near Tonzi Road 210 Comment
  UCR253508  Festuca myuros var. hirsuta George K. Helmkamp 2014-4-5 22654 A Amador Sierra Nevada Foothills, junction of Tonzi Road and CA-124, NE of Ione 201 Comment
  UCR253581  Festuca myuros var. myuros George K. Helmkamp, Amy Barnes 2014-4-7 22697 Sacramento Sacramento Valley, along CA-104/Twin Cities Rd., 0.7 mile west of the Amador County line 63 Comment
  SD237268  Festuca perennis G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15062 El Dorado Sierra Nevada Mountains Foothills: Ice House Road, .2 miles north of its junction with CA-50, c. 7.3 miles ENE of Pollock Pines. 989 Comment
  UCR231310  Festuca pratensis George K. Helmkamp, E. A. Helmkamp 2011-5-26 17399 Nevada Northern Sierra Nevada Mountains Foothills, southeast outskirts of of Grass Valley, Brunswick Road 0.2 mile northwest of the junction with Wood Rose Way 846 Comment
  UCR173734  Festuca trachyphylla George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10670 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 6.1 miles north of Hwy US-50 1653 Comment
  UCR15606  Filago gallica George K. Helmkamp 1978-6-1 s.n. Riverside Santa Ana Mountains, Santa Rosa Plateau, vernal pool 7 mi [west] of Murrieta near the origin of DeLuz Creek 671 Comment
  UCR190636  Foeniculum vulgare George K. Helmkamp, E. A. Helmkamp 2007-7-23 12563 El Dorado Northern Sierra Nevada Mountains Foothills, Rock Creek road, 7.1 miles east of its junction with CA-193 567 Comment
  SD148080  Fragaria vesca G. K. Helmkamp, E. A. Helmkamp 2000-4-21 5436 Monterey Los Padres National Forest: Nacimiento Rd., 0.7 mi east of CA-1 (Nacimiento Rd. is about 12 mi north of Gorda) 548 Comment
  UCD113238  Fragaria vesca G. K. Helmkamp; E. A. Helmkamp 2007-5-31 12247 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42, 4.3 miles west of its junction with Wright's Lake Road, generally between Wright's Lake and Ice House Reservoir. 1753 Comment
  UCR174290  Fragaria virginiana George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10722 El Dorado Northern Sierra Nevada Mountains, 0.8 mile east of Ice House Road on the road to Wright's Lake 1672 Comment
  UCD112776  Frangula californica subsp. tomentella G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12989 El Dorado northern Sierra Nevada Mountains; junction of Lost Creek Road and French Creek Road just north of Frenchtown. 366 Comment
  CLARK-A1045-818  Franseria eriocentra George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  UCR122350  Frasera albicaulis George K. Helmkamp, E. A. Helmkamp 2001-7-6 6854 Plumas Sierra Nevada Mountains, Calif. Hwy 89, ESE of Lake Almanor at Crescent Mills 976 Comment
  UCR132166  Frasera puberulenta George K. Helmkamp, E. A. Helmkamp 1993-7-28 179 Mono Sierra Nevada Mountains, Long Valley along Owens Gorge Road about 5 mi north of Tom's Place 2256 Comment
  SEINET3245836  Fraxinus latifolia G. K. Helmkamp, E. A. Helmkamp 2009-1 15567 Sacramento Sacramento Valley: along Nicolaus Ave., at the crossing over Coon Creek, just south of the junction with Warren Road, 1.1 mi SE (103 deg. ) of Towbridge. 14 Comment
  RSA628848  Fremontodendron mexicanum George K. Helmkamp, E. A. Helmkamp 1999-4-16 4670 San Diego Cottonwood Creek Watershed; N of Barret Lake. Lyons Valley Rd 1.9 mi S of Japatul Valley Rd and ca 6 mi airline SSW of junction of CA-79 and I-8 716 Comment
  UCR79310  Galium angustifolium George K. Helmkamp 1993-9-12 22- 07 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  UCR160754  Galium angustifolium subsp. angustifolium George K. Helmkamp 2004-5-2 8558 Santa Barbara Southern Central Coast, Santa Ynez Mountains, Canada del Refugio Rd., 5. mi N of US-101 488 Comment
  UCD121685  Galium aparine G. K. Helmkamp; E. A. Helmkamp 2007-3-10 11601 El Dorado Northern Sierra Nevada Mountains Foothills: Rattlesnake Bar Rd, 3.0 miles southwest of CA-49, SW of Pilot Hill. 390 Comment
  UCD121689  Galium aparine G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11801 Amador Northern Sierra Nevada Mountains: junction of Tonzi Road and CA-124 about 7 miles north of Ione. 229 Comment
  UCR140983  Galium aparine George K. Helmkamp 2004-4-23 8514 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd, 12.9 mi from Hwy-Calif. Hwy 154 at San Olivos jct. 1159 Comment
  UCR173164  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-4-25 10220 El Dorado Northern Sierra Nevada Foothills, E of Sacramento and just SW of Placerville. Forni road between US Hwy 50 and Diamond Springs, at Weber Creek 488 Comment
  UCR173777  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10145 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR217908  Galium aparine George K. Helmkamp, E. A. Helmkamp 2010-5-22 16079 El Dorado Sierra Nevada Mountains Foothills, at the junction of Perry Creek Road and Slug Gulch Road, 0.5 mi. northeast of the village of Fairplay 677 Comment
  UCR253574  Galium aparine George K. Helmkamp, Amy Barnes 2014-4-23 22800 Placer Sierra Nevada Mountains Foothills, Old Auburn-Foresthill Road, 1.7 miles northeast of its junction with CA-49 at North Fork American River 407 Comment
  UCR256993  Galium aparine George K. Helmkamp, Mary Alice Barnes 2013-5-13 20580 Amador Sierra Nevada Mountains, Fiddletown Road, c. 9 miles northeast of its junction with E-16/Shenandoah Rd. near Plymouth 665 Comment
  SD146164  Galium bifolium G. K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-29 5021 A Placer Northern Sierra Nevada Range: N of Hwy I-80 at west exit to Donner Lake; opening to Negro Canyon 2134 Comment
  UCR231007  Galium bolanderi George K. Helmkamp, E. A. Helmkamp 2010-8-14 16799 Placer Northern Sierra Nevada Mountains, American Hill Road, 1.2 miles south of its junction with Foresthill Road 1567 Comment
  UCR233464  Galium bolanderi George K. Helmkamp, E. A. Helmkamp 2011-9-1 18205 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles south of its junction with US-50 in Kyburz 1447 Comment
  UCR24977  Galium hallii George K. Helmkamp 1981-8-6 s.n. Kern Lake-of-the-Woods, edge of the clearing at a trailer park 1646 Comment
  CLARK-A1045-961  Galium nuttallii subsp. ovalifolium George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5'Q Comment
  SEINET2441558  Galium porrigens George K. Helmkamp 2009-8-12 15427 Placer Sierra Nevada Mountains: Forest Hill Road, 20.5 miles northeast of the city of Foresthill (Duncan Peak 7.5' Q.). 1662 Comment
  SD148076  Galium porrigens var. porrigens G. K. Helmkamp, E. A. Helmkamp 2001-5-29 6706 San Benito Gabilan Range: 7.1 mi S of San Juan Bautista on Hwy G-1 487 Comment
  UCR197622  Galium porrigens var. tenue George K. Helmkamp, E. A. Helmkamp 2008-5-29 13530 Calaveras Sierra Nevada Mountains, along the north side of CA-4 (Ebbetts Pass Rd.) at Avery 1024 Comment
  CLARK-A1045-136  Galium stellatum George K. Helmkamp 1977-3-20 Riverside Deep Canyon rocky ledge of dry wash in Deep Canyon; Palm Desert 15'Q Comment
  UCR37717  Galium stellatum subsp. eremicum George K. Helmkamp 1984-4-29 A- 14 San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters 701 Comment
  SEINET3828539  Galium triflorum George K. Helmkamp, E. A. Helmkamp 2011-1 18192 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz (Kyburz 7.5') 1280 Comment
  CLARK-A1045-710  Gaura coccinea George K. Helmkamp 1978-5-6 San Bernardino Mojave Desert Clark Mt 15'Q Comment
  CAS-BOT-BC227104  Gayophytum George K. Helmkamp; William Barnes 2010-9-4 16928 El Dorado Northern Sierra Nevada Mountains: Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR241750  Gayophytum George K. Helmkamp, E. A. Helmkamp 2012-9-25 19924 A Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 1.2 miles north of CA-20, N of I-80 between Grass Valley and Truckee 1427 Comment
  SEINET3285118 Image available Gayophytum decipiens George K. Helmkamp, E. A. Helmkamp 2007-7-17 12537 Alpine Northern Sierra Nevada Mountains; Blue Lake Road, about 9 miles south of its junction with CA-88. 2498 Comment
  SD236345  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13859 Alpine Eastern Sierra Nevada Mountains: Blude Lake Road just southeast of its junction with CA-88. 2180 Comment
  UCD103622  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11040 El Dorado Northern Sierra Nevada Mountains. 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd. 2226 Comment
  UCD103624  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-8-11 11215 Placer Northern Sierra Nevada Mtns; along Forest Hill Road, 8.7 miles northeast of Forest Hill. 1311 Comment
  UCD103642  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10950 El Dorado Northern Sierra Nevada Mtns. Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges. 1959 Comment
  UCD103652  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12520 Amador Northern Sierra Nevada Mountains: along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake. 2316 Comment
  UCD103680  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-9-26 13015 El Dorado Northern Sierra Nevada Mountains: Bonetti Road, 1.1 miles south of its junction with Mormon Emigrant Trail, just east of Jenkinson Lake. 1189 Comment
  UCR229447  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17894 Placer Northern Sierra Nevada Mountains, Bowman Lake Road, 0.9 mile north of its junction with CA Hwy 20, 0.85 mi. NE (23 deg. ) of Emigrant Gap and N of I-80 1434 Comment
  UCR251278  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2012-7-6 19335 El Dorado Northern Sierra Nevada Mountains, Ice House Road at Ice House village, 10.5 miles north of its junction with US-50 1677 Comment
  UCD103540  Gayophytum heterozygum G. K. Helmkamp; E. A. Helmkamp 2005-7-31 9740 El Dorado Northern Sierra Nevada Foothills; 20 miles WSW of Lake Tahoe; Ice House Road, N of CA Highway 50 and 1.5 miles S of junction with Ice House Reservoir. 1637 Comment
  UCD103552  Gayophytum heterozygum G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12791 El Dorado Northern Sierra Nevada Mountains. Ice House Road at the junction to the lower campground and boat ramp of Loon Lake. 1976 Comment
  UCR59474  Gayophytum nuttallii George K. Helmkamp 1989-7-31 s.n. Mono Sierra Nevada Mtns, just south of Mammoth Village [in Mammoth Lakes] and at the edge of Snow Creek [Golf Course] 2439 Comment
  UCR242313  Genista monspessulana George K. Helmkamp, E. A. Helmkamp 2011-6-17 17606 Amador Northern Sierra Nevada Mountains Foothills, junction of CA-26 and Joyce Road, northwest of the Hwy 26 bridge over North Fork Mokelumne River, 0.78 mi. SSW (187 deg. ) of Pioneer 762 Comment
  SD234881  Gentiana calycosa G. K. Helmkamp, E. A. Helmkamp 2008-8-30 14044 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail 2.4 miles northwest of its junction with CA-88 2271 Comment
  UCR122340  Gentianopsis holopetala George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5901 Mono Sierra Nevada Mountains, Rock Creek Lake Rd., 1.1 mi north of the Inyo County line 2896 Comment
  CAS-BOT-BC228619  Geranium carolinianum George K. Helmkamp; E. A. Helmkamp 2012-5-3 18904 El Dorado Northern Sierra Nevada Mountains Foothills: unnamed road leading to power plant, 0.3 mile east of South Fork American River bridge 613 Comment
  CLARK-A1045-59  Geranium carolinianum George K. Helmkamp 1929-4-27 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  CDA36252  Geranium dissectum G. K. Helmkamp, E. A. Helmkamp 2007-4-23 11794 Amador Foothills, Northern Sierra Nevada Mountains; Along CA Hwy 124, 0.25 mile from its junction with Hwy 16. Comment
  SEINET4560742  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-1 17258 Placer Southern Sacramento Valley: south of Lincoln along Athens Ave., 1.6 mile east of Fiddyment Road, 0.6 mi. west of Industrial Ave. 41 Comment
  UCR122605  Geranium dissectum George K. Helmkamp 1995-12-23 120 San Luis Obispo Central Coast, Pygmy Forest Preserve at the south end of Morro Bay, city of Baywood Park, South Bay Blvd 15 Comment
  UCR237043  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2012-4-21 18814 Nevada Northern Sierra Nevada Mountains Foothills, junction of Lime Kiln Road and Amberley Lane, 14.5 mi. NNW (345 deg. ) of Auburn 414 Comment
  UCR91695  Geranium dissectum George K. Helmkamp 1996-5-27 1092 San Luis Obispo Central Coast, Los Osos, northeast of the corner of Martingale Avenue and Buckskin Drive 61 Comment
  UCD103413  Geranium molle G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10147 El Dorado Northern Sierra Nevada Foothills; ENE of Sacramento, 4.2 miles NW of Coloma along CA-Hwy 49. 247 Comment
  UCD103431  Geranium molle G. K. Helmkamp; E. A. Helmkamp 2007-4-29 11874 El Dorado Northern Sierra Nevada Mountains. Lake Oaks mobile home park, Diamond Springs. 524 Comment
  UCR238573  Geranium molle George K. Helmkamp, E. A. Helmkamp 2012-3-31 18648 Placer Sacramento Valley, along CA-193, 0.1 mile west of its junction with Sierra College Blvd. 88 Comment
  UCR246404  Geranium molle George K. Helmkamp, E. A. Helmkamp 2012-3-22 18624 Amador Northern Sierra Nevada Mountains Foothills, Rancho Cicada Retreat; private road, 1.1 miles north of Bell Road on east side of Middle Fork Cosumnes River 255 Comment
  UCR257164  Geranium pusillum George K. Helmkamp, Mary Alice Barnes 2013-5-17 20616 Amador Foothills, Northern Sierra Nevada Mountains, Stony Creek Road, 8.7 miles southwest of Jackson, 0.58 mi. NNE (07 deg. ) of Chrome Mountain 308 Comment
  UCR121747  Geranium richardsonii George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5906 Mono Eastern Sierra Nevada Mountains, Rock Creek Lake Rd., 0.8 mi north of the Inyo Co. line 2896 Comment
  UCR13898  Geum macrophyllum George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at and near Big Springs 2195 Comment
  UCR130225  Gilia aliquanta subsp. breviloba George K. Helmkamp, E. A. Helmkamp 1998-5-21 4044 Los Angeles Western Mojave Desert/Transverse Range, junction of Munz Ranch Rd and Lake Elizabeth Rd., north of Lake Elizabeth 1006 Comment
  CLARK-A1045-890  Gilia austro-occidentalis George K. Helmkamp 1978-4-18 #1; 22 San Bernardino Mojave Desert 5 miles south of Barstow along State Highway 247; Barstow SE 7.5'Q Comment
  UCR121488  Gilia capillaris George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-29 5021 B Placer Northern Sierra Nevada Range, N of Hwy I-80 at west exit to Donner Lake; opening to Negro Canyon 2134 Comment
  UCR15926  Gilia capillaris George K. Helmkamp 1979-6-22 s.n. San Bernardino San Bernardino Mtns., Along [3N16], where the fork to Burnt Flat turns NW 2287 Comment
  UCR130256  Gilia capitata subsp. abrotanifolia George K. Helmkamp, E. A. Helmkamp 2001-4-27 6511 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  SD260289  Gilia capitata subsp. mediomontana George K. Helmkamp, E. A. Helmkamp 2012-6-6 19136 Amador Northern Sierra Nevada Mountains: Panther Creek Road, 1.5 miles south of its junction with CA-88, 5.0 mi. west (267a^z) of Bear River Reservoir dam. 1590 Comment
  SEINET3860399  Gilia capitata subsp. mediomontana George K. Helmkamp, Mary Alice Barnes; Mary Jane Ganibe 2010-7-6 16449 El Dorado Sierra Nevada Mountains: Silver Fork Road, 1.9 miles south of its junction with US-50 in Kyburz.; 0 1473 Comment
  SEINET11266298  Gilia capitata subsp. pedemontana George Helmkamp, E. A. Helmkamp 2011-6-17 17594 Calaveras Northern Sierra Nevada Mountains Foothills: along CA-26, 0.1 mile south of the Amador County line at the bridge over the North Fork Mokelumne River, 1.77 mi SE (1221/4) of Pioneer (West Point 7.5' Q.); 0 652 Comment
  UCR89993  Gilia filiformis George K. Helmkamp 1995-3-24 s.n. San Bernardino Eastern Mojave Desert, 1.6 miles west of Hwy 127, at point 0.9 mile north of Baker 350 Comment
  UCR14506  Gilia hutchinsifolia George K. Helmkamp 1974-5-4 s.n. Inyo Owens Valley, Owens River, Pleasant Valley 1372 Comment
  UCR30084  Gilia latifolia George K. Helmkamp 1983-4-5 483- 41 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  UCR170795  Gilia leptalea George K. Helmkamp, E. A. Helmkamp 2005-8-9 9794 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest; WSW of Lake Tahoe; 7.4 miles N of Union Reservoir along Ice House Road at the junction of Cheese Camp Road 1765 Comment
  SEINET11262538  Gilia leptalea subsp. bicolor George Helmkamp, E. A. Helmkamp 2010-9-1 16893 El Dorado Northern Sierra Nevada Mountains. Mehrten Springs Road, .6 mile north of its junction with CA-88 (Peddler Hill 7.5' Q.).; 0 2018 Comment
  UCR197355  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2008-6-23 13715 Amador Northern Sierra Nevada Mountains, Dufrene Road, 0.1 mile south of its junction with CA-88, between Mormon Emigrant Trail and Hamms Station 2076 Comment
  UCR206753  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2009-7-2 15103 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR232162  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2010-8-3 16697 Calaveras Northern Sierra Nevada Mountains, along CA-4, 0.8 mile southwest of the junction with Forest Route 7N23/ Black Creek Rd., NE of Dorrington 1854 Comment
  UCR242347  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2010-8-20 16813 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring area 2232 Comment
  UCR252800  Gilia leptalea subsp. bicolor George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22092 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 Comment
  RSA781310  Gilia leptalea subsp. leptalea George K. Helmkamp, E. A. Helmkamp 2009-7-22 15267 El Dorado Wrights Lake Road, 1.2 miles south of Wrights Lake 2073 Comment
  SEINET3246124  Gilia leptalea subsp. leptalea G. K. Helmkamp, E. A. Helmkamp 2007-1 12664 Nevada Northern Sierra Nevada Mountains: near Camp Spaulding; along Lake Spaulding Road 0.4 mile north of its junction with CA-20. 1573 Comment
  UCR103596  Gilia maculata George K. Helmkamp 1997-2-26 1309 Riverside Sonoran (Colorado) Desert, Coachella Valley, about 200 yards SE of the jct of Calif. Hwy 62 & Indian Ave. in the NW end of the Valley 488 Comment
  SD143739  Gilia malior G. K. Helmkamp, E. A. Helmkamp 1998-4-9 3286 Kern West end of city of Mojave, along Airport Blvd. 808 Comment
  UCR93401  Gilia micromeria George K. Helmkamp 1993-4-24 s.n. San Bernardino Eastern Mojave Desert, south side of Kelso sand dunes 701 Comment
  UCR102115  Gilia stellata George K. Helmkamp 1984-4-29 A 43 San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters 701 Comment
  UCR158431  Gilia tenuiflora subsp. tenuiflora George K. Helmkamp, E. A. Helmkamp 2005-4-22 9412 San Luis Obispo Inner South Coast Ranges, Carrizo Highway at Mile-32, Calif. Hwy 58, east of Santa Margarita, beside Windmill Creek 509 Comment
  UCR222993  Gilia tricolor George K. Helmkamp, E. A. Helmkamp 2010-4-24 15940 El Dorado Sierra Nevada Mountains Foothills, Oak Ridge Road just east of its junction with Blend-O-Green Way, jct. is north of Green Valley Road 390 Comment
  RSA752650  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2008-4-11 13262 Calaveras along Fricot City Road, 1.3 miles east of its junction with Calaveritas road 424 Comment
  SD241129  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2010-4-7 15835 San Joaquin Northeast San Joaquin Valley: along CA-88, 1.1 miles southwest of the Amador County line, 6 miles NE (33a^z) of Clements (Goose Creek 7.5'Q) 78 Comment
  UCR209008  Glyceria elata George K. Helmkamp, E. A. Helmkamp 2009-8-19 15508 El Dorado Sierra Nevada Mountains, Wright's Lake Road, 8.6 miles north of its upper junction with Ice House Road 1785 Comment
  CLARK-A1045-1138  Glyceria striata George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCR104785  Gnaphalium californicum George K. Helmkamp 1997-3-8 1462 San Luis Obispo Central Coast 7.5' Q., SE of Los Osos. Swift Ranch, starting c. 2 mi. south of Los Osos Valley Rd on Clark Valley Rd. 107 Comment
  UCR161100  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2005-6-12 9645 San Luis Obispo South Central Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 6.7 miles east of Santa Margarita 485 Comment
  UCR190206  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2007-7-23 12579 El Dorado Northern Sierra Nevada Mountains Foothills, along Hwy CA-193, 1.0 mile south of Georgetown 771 Comment
  UCR179392  Gnaphalium canescens subsp. beneolens George K. Helmkamp, E. A. Helmkamp 2006-9-20 11433 El Dorado Northern Sierra Nevada Mountains Foothills, West Meadow Road 0.3 mile west of its junction with Ice House Road 1050 Comment
  UCR189208  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2007-9-11 12936 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50 at Echo Summit 2256 Comment
  SD247326  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2012-9-25 19905 Placer Northern Sierra Nevada Mountains: Blue Canyon Road, 1.1 miles south of its intersection with I-80, about 1/2 mile south of Blue Canyon-Nyack Airport. 1473 Comment
  UCR176532  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2006-8-14 11227 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  UCR134688  Gnaphalium stramineum George K. Helmkamp 2003-9-19 8158 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR140126  Gnaphalium stramineum George K. Helmkamp 2004-3-13 8346 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR169944  Gnaphalium stramineum George K. Helmkamp, E. A. Helmkamp 2004-6-20 08683 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Sudden Rd west of Sudden Peak and 1.2 mi SW of Miquelito Rd (SW of Lompoc) 412 Comment
  SEINET3260405 Image available Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2008-9-22 14154 Alpine Northern Sierra Nevada Mountains; along CA-89. 0.1 mile north of Markleeville. 1686 Comment
  UCR190150  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2007-7-23 12573 El Dorado Northern Sierra Nevada Mountains Foothills, along Hwy CA-193, 1.0 mile south of Georgetown 771 Comment
  UCR218246  Grindelia hirsutula var. davyi George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16432 Placer Sierra Nevada Mountains Foothills, Yankee Jims Road on the east side of Yankee Jims Bridge over the North Fork American River, 5 mi. SE (146 deg. ) of Colfax 282 Comment
  UCR219182  Grindelia nana George K. Helmkamp, E. A. Helmkamp 2010-6-23 16364 Amador Sierra Nevada Mountains Foothills, Rams Horn Grade, 1.8 rd. miles northeast of Volcano at the junction with Sutter Creek Road 730 Comment
  CHSC118008  Grindelia squarrosa var. serrulata G. K Helmkamp; E. A Helmkamp 2008-8-20 14015 Placer Northern Sierra Nevada Mountains: Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River. 1811 Comment
  RSA750432  Grindelia squarrosa var. serrulata George K. Helmkamp, E. A. Helmkamp 2008-8-20 14015 Placer Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR131862  Grindelia stricta var. platyphylla George K. Helmkamp, E. A. Helmkamp 2000-6-18 5746 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  RSA613939  Guillenia lasiophylla George K. Helmkamp, E. A. Helmkamp 1997-3-8 1404 San Luis Obispo Carrizo Plain. 30.1 mi. NW of CA-166 on Soda Lake Rd; at San Diego Crk Rd and edge of Soda Lake. 701 Comment
  UCR79302  Gutierrezia microcephala George K. Helmkamp 1993-9-12 23- 20 San Bernardino San Bernardino Mtns., edge of Burns Canyon 1375 Comment
  CLARK-A1045-1118  Habenaria sparsiflora George K. Helmkamp 1977-9-1 V Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR176503  Hackelia George K. Helmkamp, E. A. Helmkamp 2006-8-3 11118 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  SBBG128844  Hackelia micrantha G. K. Helmkamp, E. A. Helmkamp 2010-8-7 16717 El Dorado Silver Fork Rd, 0.4 mi E of its jct with Mormon Emigrant Trail, at Jim Quinn Spring 2136 Comment
  CLARK-A1045-907  Haplopappus cuneatus George K. Helmkamp 1977-3-24 San Diego Cleveland Mountains south of Bucksnort Mountains; rocky edge of wash; ; Warner Springs 7.5'Q 1371 Comment
  UCR234560  Hazardia whitneyi var. whitneyi George K. Helmkamp, E. A. Helmkamp 2011-8-19 18148 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 2.6 miles north of its junction with Tamarack Road 2436 Comment
  UCD132740  Helenium bigelovii G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12802 El Dorado Northern Sierra Nevada Mountains. Unnamed lake at the junction of Angel Creek and Gerle Creek, 0.5 mile west of Wentworth Springs Road. 1598 Comment
  UCR123548  Heliotropium curassavicum George K. Helmkamp, Elizabeth Helmkamp 1999-11-10 5335 A San Luis Obispo Central Coast, Atascadero State Beach, 1.2 mi NNW of the junction of Calif. Hwy 1 and Calif. Hwy 41 6 Comment
  UC2044610  Hemizonella minima George K. Helmkamp with E. A. Helmkamp 2011-5-24 17365 El Dorado Northern Sierra Nevada Mountains Foothills Mesquite Road, 7.5 miles south of its junction with Wentworth Springs Road. (Slate Mountain 7.5' Q.) Comment
  UCR201780  Hemizonia congesta subsp. calyculata George K. Helmkamp, E. A. Helmkamp 2008-10-6 14222 Sutter Sacramento Valley, Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  UCD132981  Hemizonia congesta subsp. congesta G. K. Helmkamp; E. A. Helmkamp 2006-10-30 11578 El Dorado Northern Sierra Nevada Mountains Foothills: along Pleasant Valley Road, 1.1 miles west of El Dorado. 476 Comment
  UCR132012  Hemizonia increscens subsp. increscens George K. Helmkamp 2003-10-24 8215 San Luis Obispo Central Coast, El Campo Rd 0.1 mi east of Los Berros Rd, SE of Arroyo Grande 46 Comment
  UCR161462  Hemizonia pentactis George K. Helmkamp, E. A. Helmkamp 2005-6-12 9644 San Luis Obispo South Central Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 6.7 miles east of Santa Margarita 485 Comment
  UCR122194  Hemizonia pungens subsp. pungens George K. Helmkamp, E. A. Helmkamp 2002-4-23 7558 Fresno Central Valley; San Joaquin Valley, along CA Hwy 180, 10.8 mi west of CA Hwy 145 107 Comment
  UCR233343  Heracleum maximum George K. Helmkamp, E. A. Helmkamp 2011-9-13 18255 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.6 miles southeast of Jenkinson's Lake, between Silver Fork Road and Hwy 88, 0.2 mi. NNE (23 deg. ) of Alder Hill 2274 Comment
  UCR250616  Hesperolinon micranthum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20890 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 8.3 miles east of its junction with Hwy E-16 at Jenkinsons Lake 1456 Comment
  CLARK-A1045-1309  Heterocodon rariflorum George K. Helmkamp 1979-6-6 Riverside Wolf Valley Highway S16 south of Murrieta (road to Pala), mile 5; Pechanga 7.5'Q Comment
  UCD113316  Heteromeles arbutifolia G. K. Helmkamp; E. A. Helmkamp 2006-12-7 11583 El Dorado Northern Sierra Nevada Mountains: Rock Creek Road, 1.2 mi. east of CA-193, northeast of the South Fork of American River at Chili Bar. 399 Comment
  UCR219142  Heteromeles arbutifolia George K. Helmkamp, E. A. Helmkamp 2009-9-29 15657 El Dorado Sierra Nevada Mountains Foothills, Canyon Valley Rd. in the east end of Diamond Springs, c. 0.1 mile SE of Pleasant Valley Road 567 Comment
  SEINET1005020  Heterotheca grandiflora G. K. Helmkamp, E. A. Helmkamp 2006-1 11484 Calaveras Northern Sierra Nevada Mountains Foothills: along Hwy CA- 26, 0.8 mi east of CA-49 in the vicinity of Mokulumne Hill. 488 Comment
  SEINET11261446  Heterotheca grandiflora George Helmkamp, E. A. Helmkamp 2011-11-20 18469 El Dorado Northern Sierra Nevada Mountains Foothills: Salmon Falls Road, 1.9 miles northeast of the bridge over the American River.; 0 192 Comment
  RSA795039  Heuchera micrantha George K. Helmkamp, E. A. Helmkamp 2011-6-9 17523 Nevada Tyler Foote Crossing Road, 3.3 miles north of its junction with Grizzly Hill Road, NE of North Columbia near the Sierra Co. line/Middle Yuba River 878 Comment
  UCR230983  Heuchera micrantha George K. Helmkamp, E. A. Helmkamp 2011-6-9 17544 Sierra Northern Sierra Nevada Mountains Foothills, 5.9 miles north of Camptonville along CA-49, about 1.2 miles northeast of the Yuba Co. line 899 Comment
  UC2015610  Hieracium albiflorum G. Helmkamp 1995-9-21 1 -1 Mono Lake Mary Comment
  UCR146838  Hieracium argutum George K. Helmkamp, E. A. Helmkamp 2004-9-29 8811 Santa Barbara Santa Ynez Mountains, Stagecoach Road at junction with Calif. Hwy 154, SE of Lake Cachuma 561 Comment
  UCR123912  Hieracium bolanderi George K. Helmkamp, E. A. Helmkamp 2001-7-7 6923 Tehama Sierra Nevada Mountains, Calif. Hwy 36, 2.6 mi west of Mineral, about 33 mi west of Chester, Lake Almanor 1418 Comment
  UCR134298  Hoffmannseggia glauca George K. Helmkamp, E. A. Helmkamp 1999-9-24 5290 San Bernardino Southern Mojave Desert, Dale Dry Lake, 1.8 mi north of Calif. Hwy 62 351 Comment
  UCR121583  Holcus lanatus George K. Helmkamp, E. A. Helmkamp 1999-6-28 4984 San Mateo Pescadero Creek Watershed, Pescadero Road just north of Loma Mar 107 Comment
  UCR91835  Holcus lanatus George K. Helmkamp 1996-5-27 1095 San Luis Obispo Central Coast, west side of San Luis Obispo, south-facing slope of Bishop Peak 280 Comment
  UCD133236  Holocarpha virgata G. K. Helmkamp; E. A. Helmkamp 2006-10-23 11555 Sacramento Sacramento Valley: Along Latrobe Road, 0.1 mile west of the El Dorado County line, about 3.5 miles southwest of Latrobe. 137 Comment
  CHSC118017  Holocarpha virgata subsp. virgata G. K Helmkamp; E. A Helmkamp 2007-9-17 12981 El Dorado Foothills, northern Sierra Nevada Mountains along Greenstone Road just south of its junction with US-50 (east of Shingle Springs) 427 Comment
  JEPS119430  Holocarpha virgata subsp. virgata G. K. Helmkamp, E. A. Helmkamp 2011-11-19 18460 Sacramento Eastern Sacramento Valley, White Rock Road, 0.2 mile west of its junction with Placerville Road, 5.5 mi. SE (130 deg. ) of Folsom Comment
  UCR201722  Holocarpha virgata subsp. virgata George K. Helmkamp, E. A. Helmkamp 2008-10-23 14274 Amador San Joaquin Valley, 0.3 mile north of the gated entrance to the North Shore Residence area of Comanche Reservoir 76 Comment
  UCR158618  Holodiscus discolor George K. Helmkamp, E. A. Helmkamp 2004-6-20 8670 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  RSA519144  Holodiscus microphyllus George K. Helmkamp 1990-8-2 s.n. Mono Between Mammoth and Lake Mary. 2591 Comment
  SEINET13203104 Image available Hordeum murinum subsp. glaucum George K. Helmkamp, Amy Barnes 2014-1 22597 Sutter Sacramento Valley: aling CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter (Sutter Buttes 7.5' Q.) 13 Comment
  UCR257162  Hordeum murinum subsp. glaucum George K. Helmkamp 2014-4-17 22744 Nevada Northern Sierra Nevada Mountains Foothills, along CA-120, 2.3 miles west of its junction with CA-49 in Grass Valley 729 Comment
  SEINET3828566  Hordeum murinum subsp. leporinum George K. Helmkamp, E. A. Helmkamp 2012-1 18785 Yolo Sacramento Valley: along County Road 26, 1.4 miles west of its intersection with Road 89, c. 12 miles WSW of Woodland. 65 Comment
  UCR201541  Horkelia californica George K. Helmkamp, E. A. Helmkamp 2008-9-28 14165 Amador Foothills, northern Sierra Nevada Mountains, Sutter Creek Rancho Road on the north side of CA-88 and 4.2 miles southwest of the junction of CA-88 and CA-49 287 Comment
  UCD113477  Horkelia fusca var. parviflora G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10949 El Dorado Northern Sierra Nevada Mtns: Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges. 1960 Comment
  CAS-BOT-BC143988  Horkelia fusca var. tenella G. K. Helmkamp; Elizabeth Helmkamp 2001-7-7 6861 Plumas Sierra Nevada Mountains: CA-89, 2.3 mi SSE of its junction with CA-26 (Lake Almanor Region) 1357 Comment
  RSA567557  Horkelia rydbergii George K. Helmkamp 1993-9-22 36 -5 San Bernardino 16.4 miles up Burns canyon from junction of Pipes Canyon and Pioneer Town Roads. 2195 Comment
  UCD113572  Horkelia tridentata var. tridentata G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12061 Placer Northern Sierra Nevada Mountains: Humbug Canyon Road, 0.2 mile northwest of Forest Hill Road, generally southwest of Westville. Comment
  UCD113574  Horkelia tridentata var. tridentata G. K. Helmkamp; E. A. Helmkamp, Amy Barnes 2007-6-20 12364 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 13.2 miles ESE of its junction with Sly Park Road at Jenkinson Lake. 1976 Comment
  SEINET15325662  Hosackia oblongifolia G. K. Helmkamp, E. A. Helmkamp 2012-1 19350 El Dorado Northern Sierra Nevadad Mountains: Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-502078 2078 Comment
  CLARK-A1045-443  Hymenopappus filifolius var. lugens George K. Helmkamp 1979-6-3 San Bernardino San Bernardino Mountains 2 miles east of fawnskin; dry slope under pines, beside Lake; Fawnskin 7.5'Q Comment
  SEINET238558  Hymenopappus filifolius var. lugens George K. Helmkamp 1998-6-27 4122 Riverside Santa Rosa Mtns.: 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. below Mountain Home Spring. 1799 Comment
  UCD110337  Hypericum anagalloides G. K. Helmkamp; E. A. Helmkamp 2007-6-20 12411 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 2.0 miles west of its junction with Hwy CA-88 and at Shingleton Springs. 2247 Comment
  UCR111003  Hypericum anagalloides George K. Helmkamp, E. A. Helmkamp 1999-6-30 5108 Placer Northern Sierra Nevadas, Soda Springs Road 0.9 mi south of Donner Pass Road, approaching Ice Lakes. 2104 Comment
  UCR170799  Hypericum formosum var. scouleri George K. Helmkamp, E. A. Helmkamp 2005-9-30 9937 Placer Northern Sierra Nevada Mtns., Hampshire Rocks Road south of the I-80 Rainbow exit (c. 2 mi east of Cisco Grove) 1805 Comment
  UCR123379  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 1999-6-29 5054 Placer Sierra Nevada Foothills, corner of Dry Creek Rd & Bowman Rd, near Nielsburg, 3 mi NE of Auburn beside I-80 & 1.5 NW of North Fork Lake on American River 457 Comment
  UCR176412  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2006-8-7 11153 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 16.7 miles east of its junction with Sly Park Road 1944 Comment
  UCR190193  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2007-7-23 12584 El Dorado Foothills, northern Sierra Nevada Mountains, Traverse Creek Road at the crossing of Traverse Creek; about 2 miles southeast of its junction with CA-193 732 Comment
  UCR215921  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2009-6-29 15074 El Dorado Sierra Nevada Mountains, Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74 deg. ) of Pollock Pines 1642 Comment
  UCR249165  Hypericum perforatum George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20796 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.9 miles NE of the Yuba County line, NE of Camptonville 796 Comment
  RSA0035674  Hypochaeris glabra George K. Helmkamp, Mary Alice Barnes 2013-5-3 20464 Placer SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road 974 Comment
  SEINET272171  Hypochaeris glabra G. K. Helmkamp, E. A. Helmkamp 1997-4-24 1659 Orange Cleveland National Forest ; Cleveland National Forest 1.6 mi. SE of Ortega Hwy (CA-74) on Rd. 7-S14. UTM 10km cell: MH-5E 1N. San Juan Hot Spring 549 Comment
  UCD133340  Hypochaeris glabra G. K. Helmkamp; E. A. Helmkamp 2007-4-20 11754 El Dorado Northern Sierra Nevada Mountains; junction of French Creek Road and Lost Creek Road, just north of Frenchtown. 366 Comment
  UCR173484  Hypochaeris glabra George K. Helmkamp, Elizabeth Helmkamp 2006-4-29 10261 El Dorado Northern Sierra Nevada Foothills, Rock Creek Road, 0.9 mi. east of Calif. Hwy 193 along the S Fork of the American River 415 Comment
  UCR187077  Hypochaeris glabra George K. Helmkamp, E. A. Helmkamp 2007-5-5 11938 El Dorado Foothills, Northern Sierra Nevada Mountains, along CA-49, 3.7 miles northwest of Placerville 549 Comment
  SEINET273101  Hypochaeris radicata G. K. Helmkamp, E. A. Helmkamp; A. Kerchner 1997-6-26 2160 Mendocino Fort Bragg; Glass Beach. 6 Comment
  UCR176240  Ipomopsis aggregata subsp. formosissima George K. Helmkamp, E. A. Helmkamp 2006-7-7 10847 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  UCR233460  Ipomopsis aggregata subsp. formosissima George K. Helmkamp, E. A. Helmkamp 2011-8-26 18180 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 12.9 miles east of Humbug Road, less than 1 mile northwest of Robinson Flat 2050 Comment
  UCR218206  Iris hartwegii subsp. columbiana George K. Helmkamp, E. A. Helmkamp 2010-5-31 16199 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, about 8 miles east of the village of Sutter Creek 457 Comment
  UCR232214  Iris hartwegii subsp. hartwegii George K. Helmkamp, E. A. Helmkamp 2011-6-7 17488 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCR253572  Iris hartwegii subsp. hartwegii George K. Helmkamp, Amy Barnes 2014-4-23 22798 Placer Sierra Nevada Mountains Foothills, Old Auburn-Foresthill Road, 1.7 miles northeast of its junction with CA-49 at North Fork American River 407 Comment
  UCD60415  Iris hartwegii subsp. pinetorum G. K. Helmkamp; E. A. Helmkamp 2007-5-9 11988 El Dorado Northern Sierra Nevada Mountains: White Meadow Road, 0.6 mile west of its junction with Ice House Road, c. 0.75 mile NNW of Riverton. 1082 Comment
  UCR184801  Isopyrum stipitatum George K. Helmkamp, E. A. Helmkamp 2007-5-9 11973 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 3.2 miles north of Ice House, near Jones Place 1515 Comment
  UCR95900  Ivesia kingii var. kingii George K. Helmkamp 1996-10-17 1261 Mono Eastern Sierra/Mono Basin Region, Ecological Preserve at the east end of River Springs Lakes 1951 Comment
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May 24 2013
  CAS-BOT-BC142794  Ivesia lycopodioides subsp. megalopetala G. K. Helmkamp; E. A. Helmkamp 1998-8-12 4370 Inyo Eastern High Sierra Mountains: Rock Crk Valley, 1.0 mi S of Rock Creek Lake 3108 Comment
  UCR219140  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-9-17 15630 El Dorado Sierra Nevada Mountains Foothills, Pleasant Valley Road (CA-49) in Diamond Springs at the junction with Patterson Drive 541 Comment
  RSA781381  Juncus George K. Helmkamp, E. A. Helmkamp 2008-7-11 13768 El Dorado Tragedy Spring Road, 8.0 miles southwest of Kirkwood and 0.1 mile north of its junction with CA-88 2421 Comment
  UCR215780  Juncus George K. Helmkamp, E. A. Helmkamp 2009-7-30 15353 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR245584  Juncus acuminatus George K. Helmkamp, Amy Barnes 2013-9-24 22348 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCR134711  Juncus balticus George K. Helmkamp, E. A. Helmkamp 1998-8-10 4279 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR173691  Juncus balticus George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10321 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  CLARK-A1045-475  Juncus bufonius George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains between the north end of the Lake and State Highway 38; grassy seep; Big Bear City 7.5'Q Comment
  SEINET271518  Juncus bufonius G. Helmkamp 1994-5-18 91 -1 San Luis Obispo Alamo Cyn 7 mi E of US-101 on CA-166m then 4 mi N (generally NE of Twitchell Reservoir). 213 Comment
  SEINET3815512 Image available Juncus bufonius var. bufonius George K. Helmkamp, E. A. Helmkamp 2012-5-15 18996 Calaveras Northern Sierra Nevada Mountain Foothills: at a crossing of Murray Creek along Murray Creek Road; 1.8 miles E of Pope Road in San Andreas 351 Comment
  UCR173657  Juncus bufonius var. bufonius George K. Helmkamp, Elizabeth Helmkamp 2006-5-1 10286 El Dorado Northern Sierra Nevada foothills, corner of Pleasant Valley Road and Patterson Drive; west end of Diamond Springs 537 Comment
  UCD141440  Juncus chlorocephalus G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11088 El Dorado Northern Sierra Nevada Mountains: along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy US-50. 1864 Comment
  UCR121465  Juncus chlorocephalus George K. Helmkamp, E. A. Helmkamp 1999-6-30 5082 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  UCR170429  Juncus effusus George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10034 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, N of Union Valley Reservoir]; Wentworth Springs Road, 5.9 [road] mi east of Uncle Toms Cabin 1567 Comment
  UCR171039  Juncus effusus George K. Helmkamp, E. A. Helmkamp 2005-7-31 9722 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR174196  Juncus effusus var. exiguus George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10801 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 0.2 mile north of West Point 838 Comment
  UCR190182  Juncus effusus var. pacificus George K. Helmkamp, E. A. Helmkamp 2007-8-21 12787 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 21.3 miles north of CA-50 at Robbs Hut Road 2078 Comment
  UCR177876  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2006-8-7 11197 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring; Tragedy Spring Road, 0.3 mile north of Calif. Hwy 88 2424 Comment
  UCR91803  Juncus falcatus var. falcatus George K. Helmkamp 1996-5-27 1096 San Luis Obispo Central Coast, Los Osos, northeast of the corner of Martingale Avenue and Buckskin Drive 61 Comment
  UCR201733  Juncus macrandrus George K. Helmkamp, E. A. Helmkamp 2008-8-1 13933 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 3.8 miles north of its junction with CA-50 2076 Comment
  UCR257657  Juncus mexicanus George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19457 Sierra Northern Sierra Nevada Mountains, Henness Pass Road, 1.1 mile east of its junction with CA-89 at the north end of Kyburz Flat 1907 Comment
  UCR176046  Juncus orthophyllus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11008 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR241319  Juncus oxymeris George K. Helmkamp, E. A. Helmkamp 2012-9-20 19876 Amador Northern Sierra Nevada Mountains Foothills, along Hwy E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  UCR253597  Juncus oxymeris George K. Helmkamp, Elizabeth Helmkamp 2012-11-5 20119 Amador Sierra Nevada Mountains Foothills, Along CA-26 on the north side of the bridge over the North Fork Mokelumne River 628 Comment
  UCR91690  Juncus phaeocephalus var. phaeocephalus George K. Helmkamp 1996-5-24 1036 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  UCR206717  Juncus saximontanus George K. Helmkamp, E. A. Helmkamp 2009-7-16 15204 Placer Sierra Nevada Mountains, Foresthill Road, 20.3 miles northeast of the city of Foresthill 1704 Comment
  UCR229542  Juncus tenuis George K. Helmkamp, E. A. Helmkamp 2011-7-26 17866 Nevada Northern Sierra Nevada Mountains, along CA Hwy 20, 0.8 mi. east of Bowman Lake Road, 1.23 mi. NE (50 deg. ) of Emigrant Gap and 0.35 mi. N of I-80 1541 Comment
  UCR188019  Keckiella breviflora subsp. breviflora George K. Helmkamp, E. A. Helmkamp 2007-5-5 11930 El Dorado Foothills, Northern Sierra Nevada Mountains, along CA-49, 3.7 miles northwest of Placerville 549 Comment
  UCR193339  Keckiella breviflora subsp. breviflora George K. Helmkamp, E. A. Helmkamp 2007-5-30 12177 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 10.7 miles east of its junction with Forest Hill Road in Foresthill 588 Comment
  CAS-BOT-BC235618  Keckiella breviflora var. breviflora G. K. Helmkamp; E. A. Helmkamp 2009-6-29 15059 El Dorado Sierra Nevada Mountains Foothills: Ice House Road, 0.2 miles north of its junction with CA-50, c. 73 miles ENE (83 deg. ) of Pollock Pines 989 Comment
  UCR158748  Keckiella cordifolia George K. Helmkamp, E. A. Helmkamp 2004-6-20 8664 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR249170  Keckiella lemmonii George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20788 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.8 miles west of Goodyears Bar, c. 5 miles west of Downieville 779 Comment
  RSA0053705  Kelloggia galioides G. K. Helmkamp, E. A. Helmkamp 2012-6-19 19223 Placer Northern Sierra Nevada Mountains: Devil's Thumb Road (Deadwood Rd.), 1.2 miles S of its junction with Foresthill Road 1648 Comment
  UCR233042  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2011-9-24 18320 El Dorado Northern Sierra Nevada Mountains, Loon Lake [Ice House] Road, 2.7 miles NNE of its junction with Wentworth Springs Road 1884 Comment
  UCR242807  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2010-9-1 16898 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  SD234524  Kickxia elatine G. K. Helmkamp, E. A. Helmkamp 2007-9-19 12987 El Dorado Foothills, northern Sierra Nevada Mountains: junction of Lost Creek Road and French Creek Road just north of Frenchtown. 366 Comment
  UCR14876  Kickxia elatine George K. Helmkamp 1975-7-27 s.n. San Luis Obispo Central Coast, one-half mile south of Cambria 30 Comment
  UCR219171  Kickxia elatine George K. Helmkamp, E. A. Helmkamp 2009-9-22 15636 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  SEINET3245869  Lactuca serriola G. K. Helmkamp, E. A. Helmkamp 2009-1 15562 Sutter Sacramento Valley: along Nicolaus Ave. 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86 deg. ) of Nicolaus. 8 Comment
  UCR209014  Lagophylla ramosissima subsp. ramosissima George K. Helmkamp, E. A. Helmkamp 2009-8-19 15515 El Dorado Sierra Nevada Mountains Foothills, junction of Meadowbrook and Bear Creek roads at Traverse Creek, south of Georgetown 674 Comment
  UCR206691  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-1-31 14323 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  UCR237589  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2012-3-9 18616 Yolo Sacramento Valley, County Road 16, 2.1 miles east of its junction with County Road 102; at the area where the road turns sharply north, c. 4 miles NE of Woodland 17 Comment
  UCR253565  Lamium amplexicaule George K. Helmkamp 2014-4-5 22667 Amador Sierra Nevada Foothills, junction of Tonzi Road and CA-124, NE of Ione 201 Comment
  UCR103334  Langloisia setosissima subsp. punctata George K. Helmkamp 1998-3-30 3029 San Bernardino Mojave Desert, vicinity of Twentynine Palms; Encelia Ave., 1.0 mi. north of Calif. Hwy 62 793 Comment
  RSA785393  Lapsana communis George K. Helmkamp, E. A. Helmkamp 2010-6-23 16343 Amador Sutter Creek Road, 7.2 miles northeast of its junction with old CA-49 in Sutter Creek village 473 Comment
  UCR232607  Lapsana communis George K. Helmkamp, E. A. Helmkamp 2011-10-13 18423 El Dorado Northern Sierra Nevada Mountains, Pony Express Trail, 0.9 mile east of Sly Park Road in Pollock Pines 1220 Comment
  UCR89566  Larrea tridentata George K. Helmkamp 1994-3-8 41 16 Riverside Western Colorado Desert, SW-facing slope at the junction of [Date] Palm Dr. and Varner Rd., below Edom Hill, 'Indio Hills 152 Comment
  SD254538  Lasthenia californica George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20230 Calaveras Northern Sierra Nevada foothills: Along CA-26 at the juncton with Shelton Road, southwest of Valley Springs, NE of Linden (Valley Springs SW 7.5'Q) 203 Comment
  RSA614976  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 1998-4-8 3241 San Luis Obispo Soda Lake Rd at Arrowbear Trail (vic. of California Valley, ca. 5 mi. NW of Soda Lake) 610 Comment
  SEINET3246050  Lasthenia gracilis G. K. Helmkamp, E. A. Helmkamp 2007-1 11686 El Dorado Foothills, Northern Sierra Nevada Mountains: hills bordering the east end of Sacramento Valley; Bass Lake Road at the southeast end of Bass Lake. 381 Comment
  UCR129525  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 1998-5-20 4025 Ventura Transverse Range; Mt. Pinos Region, San Emigdio Mountains, Lockwood Valley Rd., 1.7 mi SW of its junction with Cuddy Valley Rd. at Lake of the Woods 1738 Comment
  UCR91692  Lasthenia gracilis George K. Helmkamp 1996-5-25 1065 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  UCD133882  Lasthenia platycarpha G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11650 Calaveras Eastern Sacramento Valley; about 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCD133884  Lasthenia platycarpha G. K. Helmkamp; E. A. Helmkamp 2007-4-5 11739 Sacramento Eastern Sacramento Valley; along Hwy CA-104, 5.6 miles west of Ione. 66 Comment
  UCR197498  Lasthenia platycarpha George K. Helmkamp, E. A. Helmkamp 2008-3-22 13216 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, 1.8 miles north of Burson via Burson Rd., at the junction of Comanche Parkway South and Pattison Way 122 Comment
  UCR249563  Lasthenia platycarpha George K. Helmkamp 2013-3-14 20185 Calaveras San Joaquin Valley/Sierra Nevada Foothills, Jenny Lind Road (County Road J14) 0.1 mile north of its junction with Kirby Road, 24 mi. NE of Stockton 91 Comment
  UCR106459  Lathyrus latifolius George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2159 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR159329  Lathyrus latifolius George K. Helmkamp, E. A. Helmkamp 2004-6-24 8733 Santa Barbara Central Coast, Along Calif. Hwy 1, 0.2 mi south of Brown Rd (S of Guadelupe) 46 Comment
  UCR171326  Lathyrus latifolius George K. Helmkamp, E. A. Helmkamp 2005-7-11 9681 El Dorado Northern Sierra Nevada Foothills, 30 miles SW of Lake Tahoe; 1 mile east of Jenkinson Lake along Mormon Emigrant Road/County Highway 5 1220 Comment
  SD241007  Lathyrus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-5-11 18954 Placer Northern Sierra Nevada Mountains Foothills: Finning Mill Road, 1.7 miles north of its junction with Forest Hill Road. 1041 Comment
  CLARK-A1045-1303  Lathyrus splendens George K. Helmkamp 1978-3-25 San Diego Cleveland Mountains east of Barrett; Cameron Corners 7.5'Q Comment
  UCD106443  Lathyrus sulphureus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-20 10510 El Dorado Northern Sierra Nevada Foothills: ca. 5 air mi off CA Hwy 193, E of Georgetown; 1.7 mi. N of Wentworth Springs Road on Bottlehill Road (junction just E of Balderson Station). 973 Comment
  UCR173717  Lathyrus sulphureus George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10510 El Dorado Northern Sierra Nevada Foothills, c. 5 air mi off Calif. Hwy 193, east of Georgetown; 1.7 mi. N of Wentworth Springs Road on Bottlehill Road (junction just east of Balderson Station) 973 Comment
  SEINET238557  Lathyrus vestitus George K. Helmkamp 1998-6-27 4119 Riverside Santa Rosa Mtns.: 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. below Mountain Home Spring. 1799 Comment
  UCR130636  Lathyrus vestitus subsp. alefeldii George K. Helmkamp, E. A. Helmkamp 1999-4-15 4657 a San Diego Peninsular Ranges, c. 5 mi NE of Alpine. Old Viejas Grade at the E side of Viejas Mtn., 0.6 mi east of the Viejas Indian Reservation 854 Comment
  UCR161226  Lathyrus vestitus var. vestitus George K. Helmkamp, E. A. Helmkamp 2005-3-5 9006 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness north of Lake Lopez, Upper Lopez Canyon Road, 7.2 mi north of jct with Lopez Road and at Water End Road 174 Comment
  JEPS119407  Layia platyglossa G. K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa. Comment
  UCR159306  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2005-4-22 9390 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR91813  Layia platyglossa George K. Helmkamp 1996-5-25 1054 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  SEINET3123950 Image available Leontodon taraxacoides George K. Helmkamp, Amy Barnes 2010-5-7 16968 Calaveras Sierra nevada Mountains, Foothills along CA-49, 0.4 miles north of its junction with Ca-12, vicinity of San Andreas 230 Comment
  UCR235299  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2011-11-17 18454 El Dorado Southeastern Sacramento Valley, 1.6 miles west of Latrobe on South Shingle Road 194 Comment
  UCR237568  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2012-2-17 18550 Sacramento Sacramento Valley, along Scott Road, 2.67 miles south of its junction with White Rock Road, south of Folsom Lake and Hwy 50 76 Comment
  UCR241981  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2012-9-7 19789 Amador Northern Sierra Nevada Mountains Foothills, along CA-49 in Plymouth; 0.1 mile south of its junction with Fiddletown Rd./Plymouth-Shenandoah Rd. 303 Comment
  UCR170357  Leontodon taraxacoides subsp. taraxacoides George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9855 El Dorado Northern Sierra Nevada Foothills, east of Sacramento; Sly Park Road (County Highway E-16), c. 2 mi east of Pleasant Valley 854 Comment
  UCR249963  Leontodon taraxacoides subsp. taraxacoides George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20228 San Joaquin East end of San Joaquin Valley, Escalon Bellota Road (J6), 6.1 miles south of its junction with CA-26, 0.52 mi. S of Copperopolis Rd. 52 Comment
  UCR197805  Lepidium campestre George K. Helmkamp, E. A. Helmkamp 2008-5-20 13459 Yuba Sierra Nevada Mountains Foothills, along CA-49, 0.1 mile north of the Nevada Co. line at Oregon Creek 466 Comment
  UCR206927  Lepidium campestre George K. Helmkamp, E. A. Helmkamp 2009-6-11 14956 Shasta Southern Cascade Mountains, McCumber Lake Road, at the south end of McCumber Lake and 3.3 miles northeast of its junction with CA-44 1099 Comment
  UCR103317  Lepidium lasiocarpum George K. Helmkamp 1998-2-5 2640 Riverside Sonoran (Colorado) Desert/San Jacinto Mtns., Palm Springs, 1.1 mi. west of Calif. Hwy 111 on Tramway Rd. 335 Comment
  UCR132051  Lepidium latifolium George K. Helmkamp 2003-7-31 8068 San Luis Obispo Central Coast, west edge of Nipomo Hill at junction of Cienaga Rd. and Valley View Road 15 Comment
  UCR101027  Lepidium nitidum var. nitidum George K. Helmkamp, E. A. Helmkamp 1998-4-8 3232 San Luis Obispo Soda Lake Rd, 6.6 mi. NW of jct with Calif. hwy 33 (roughly west of Maricopa). 671 Comment
  UCR184388  Lepidium nitidum var. nitidum George K. Helmkamp, E. A. Helmkamp 2007-3-14 11636 Sacramento Sacramento Valley near the edge of Sierra Nevada Mountains foothills, Latrobe Rd about 5.7 miles west of Latrobe and 1.5 miles west of the El Dorado Co. line 110 Comment
  CLARK-A1045-488  Lepidium perfoliatum George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains north edge of Baldwin Lake; sagebrush scrub; ; Big Bear City 7.5'Q 2133 Comment
  UCR237300  Lepidium strictum George K. Helmkamp, E. A. Helmkamp 2012-4-14 18748 Butte Northern Sacramento Valley, Robinsons Corner, Simpson Rd, just east of junction of East Gridley Road and CA-70 23 Comment
  UCR257703  Lepidium virginicum var. pubescens George K. Helmkamp, Amy Barnes 2012-8-12 19632 Alpine Northern Sierra Nevada Mountains, north side of CA-88/Carson Pass Hwy, 0.4 mile east of its junction with Kirkwood Meadows Drive 2357 Comment
  UCR229544  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17864 Placer Northern Sierra Nevada Mountains, Emigrant Gap Road, 0.1 mile west of its junction with US-80, 0.65 mi. NE (65 deg. ) of Emigrant Gap 1590 Comment
  UCR230653  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17852 Calaveras Northern Sierra Nevada Mountains Foothills, CA Hwy 4, 4.2 miles northeast of Arnold 1221 Comment
  UCR237094  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2012-7-14 19403 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  UCR140061  Leptodactylon californicum George K. Helmkamp 2004-4-14 8421 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR87840  Lesquerella occidentalis George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 8 -10 Alpine Sierra Nevada Mtns., Monitor Pass, along Calif. Hwy 89 2530 Comment
  IRVC28940  Lessingia filaginifolia var. filaginifolia G. K. Helmkamp 2003-9-10 8138 San Luis Obispo 0.6 mi S of Nipomo Hill in Arroyo Grande area Central Coast 46 Comment
  UCR134376  Lessingia filaginifolia var. filaginifolia George K. Helmkamp 2003-9-26 8172 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  UCR67024  Lessingia filaginifolia var. filaginifolia George K. Helmkamp 1990-9-5 s.n. Monterey Central Coast, 2 miles north of Gorda 46 Comment
  UCR95902  Lessingia glandulifera var. peirsonii George K. Helmkamp 1996-10-17 1259 A Mono Owens Valley, 0.2 mi. south of Benton Hot Springs, beside Calif. Hwy 120 1745 Comment
  CAS-BOT-BC226949  Lessingia leptoclada George K. Helmkamp; E. A. Helmkamp 2011-7-30 17914 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road at the junction with North-South Road, 0.67 mi. NW (300 deg. ) of jct. with Hwy 88; 8.9 miles southeast of Omo Ranch 1457 Comment
  SBBG129099  Lessingia leptoclada G. K. Helmkamp, A. Barnes 2013-9-24 22379 Tuolumne Boards Crossing of the N Fork of the Stanislaus River 1244 Comment
  SBBG133754  Lessingia leptoclada G. K. Helmkamp, E. A. Helmkamp 2011-7-30 17914 El Dorado Omo Ranch Rd at the jct with N-S Rd, 0.67 mi NW (300 deg) of jct with Hwy 88, 8.9 mi SE of Omo Ranch 1457 Comment
  SEINET2441560  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2009-8-8 15419 El Dorado Sierra Nevada Mountains Foothills: Lake Foreboy, 0.8 mile northwest of Pollock Pines on Forebay Road (Pollock Pines 7.5' Q.). 1195 Comment
  SEINET4560544  Lessingia leptoclada George K. Helmkamp, Amy Barnes 2013-1 22379 Tuolumne Northern Sierra Nevada Mountains: Boards Crossing of the North Fork of the Stanislaus River. Comment
  UCR182297  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2006-10-8 11497 Calaveras Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 26 at the West Branch of the Mokulumne River, about 15 miles west of Calif. Hwy 49 710 Comment
  UCR229578  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2011-7-30 17914 El Dorado Northern Sierra Nevada Mountains, Omo Ranch Road at the junction with North-South Road, 0.67 mi. NW (300 deg. ) of jct. with Hwy 88; 8.9 miles southeast of Omo Ranch 1457 Comment
  UCR240699  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2012-9-1 19746 Calaveras Northern Sierra Nevada Mountains Foothills, along Winton Road, 0.3 mile east of its junction with Lily Gap Road, 6.4 miles NE (66 deg. ) of West Point 1314 Comment
  UCR248425  Lessingia leptoclada George K. Helmkamp, Elizabeth Helmkamp 2013-9-13 22293 Amador Northern Sierra Nevada Mountains Foothills, Fiddletown Road, 0.4 mile west of its junction with Shake Ridge Road 977 Comment
  UCR114378  Leucanthemum vulgare George K. Helmkamp, E. A. Helmkamp 2000-7-17 5831 Mono Sierra Nevada Mountains, South Twin Lake along Lake Mary Road, 3 miles SW of Mammoth Lakes 2561 Comment
  CLARK-A1045-441  Lewisia rediviva subsp. minor George K. Helmkamp 1979-6-5 #5 San Bernardino San Bernardino Mountains 1.5 miles east of Fawnskin; dry slope under pines; ; Fawnskin 7.5'Q 2133 Comment
  UCR129556  Leymus cinereus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6815 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  RSA747380  Ligusticum grayi George K. Helmkamp, Mary Barnes, Amy Barnes 2008-7-28 13921 El Dorado Northern Sierra Nevada Mountains: Dark Lake, beside Wrights Lake Road 0.4 mile northwest of the entrance to Wrights Lake 2134 Comment
  SD236162  Ligusticum grayi G. K. Helmkamp, E. A. Helmkamp 2008-7-16 13805 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR176414  Ligusticum grayi George K. Helmkamp, E. A. Helmkamp 2006-7-31 11069 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy US-50 1864 Comment
  UCR176029  Lilium parvum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10964 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR198489  Limnanthes alba subsp. alba George K. Helmkamp, E. A. Helmkamp 2008-5-4 13379 Amador Sierra Nevada Mountains, Barton, c. 15 miles (air) NE of Jackson, at the junction of Tiger Creek Road and Black Prince Road, 0.6 mil east of the junction of Tiger Creek Road with CA-88 936 Comment
  UCR250301  Limnanthes alba subsp. alba George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20224 Stanislaus Eastern San Joaquin Valley, along CA-4, 1.5 miles east of the San Joaquin County line, 12.5 mi. WSW (259 deg. ) of Copperopolis 70 Comment
  RSA0115717  Limnanthes montana George K. Helmkamp 2013-4-30 20442 El Dorado Sierra Nevada Mountains Foothills: Pleasant Valley Road, 0.4 mile northwest of Pleasant Valley. 753 Comment
  UCR257717  Limnanthes montana George K. Helmkamp 2013-4-30 20442 El Dorado Sierra Nevada Mountains Foothills, Pleasant Valley Road, 0.4 mile northwest of Pleasant Valley 753 Comment
  UCR132010  Limonium sinuatum George K. Helmkamp 2003-10-8 8211 San Luis Obispo Central Coast, base of Nipomo Mesa 0.25 mi SW of Halcyon Rd along an unnamed road near the railroad crossing 15 Comment
  CLARK-A1045-168  Linanthus androsaceus George K. Helmkamp 1979-4-27 Riverside Santa Ana Mountains Wildomar 7.5' Q Comment
  UCR185235  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 2007-4-20 11771 El Dorado Foothills, Northern Sierra Nevada Mountains, junction of Uhlenkamp Road and Pine Hill Road, north of Grass Valley Road and northwest of Placerville 401 Comment
  RSA795035  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2011-8-6 17958 Amador Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  UCR197633  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2008-6-9 13623 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.1 mile south of its junction with CA-88, jct. is 4.0 miles east of Cook's Station 1652 Comment
  UCR206931  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2009-6-11 14969 Shasta Southern Cascade Range, Long Hay Flat Road, 0.1 mile south of CA-44, junction is 8.6 miles east of Shingletown 1276 Comment
  UCR218080  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2010-7-9 16504 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  UCR233103A  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17735 Calaveras Northern Sierra Nevada Mountains, Winton Road (Forest Route 7N03), 14.4 miles east of its junction with CA-26 in West Point 1590 Comment
  UCR240939  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-26 19287 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek 1345 Comment
  UCR15018  Linanthus ciliatus var. ciliatus George K. Helmkamp 1976-6-22 s.n. Mono Sierra Nevada Mtns, Mammoth Lakes 2409 Comment
  UCR129961  Linanthus liniflorus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5545 Monterey Outer south coast ranges., Nacimiento Road, 10.4 mi west of Mission Road, just south of Mission San Antonio 457 Comment
  UCR124025  Linanthus parryae George K. Helmkamp, E. A. Helmkamp 2001-5-2 6660 Los Angeles Western Mojave Desert, Antelope Valley, 0.1 mi west of Calif. Hwy 138 on Ave. W, then 0.3 mi S on [180th St. East] dirt road 976 Comment
  UCR118250  Linanthus parviflorus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5520 Monterey Los Padres National Forest, Nacimiento Rd. (starts about 12 mi north of Gorda), 10.2 mi east of Calif. Hwy 1; at Sherlock Creek 595 Comment
  RSA0012080  Linum bienne George K. Helmkamp, E. A. Helmkamp 2011-5-6 17208 Yuba junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 deg ) of Wheatland. 56 Comment
  UCR176009  Linum lewisii var. alpicola George K. Helmkamp, E. A. Helmkamp 2006-7-28 11025 El Dorado Northern Sierra Nevada Mtns, North Truckee River Rd., 1.4 miles north of Calif. Hwy 50 and c. 6 miles south of Lake Tahoe 2009 Comment
  UCR217912  Lithophragma parviflorum George K. Helmkamp, E. A. Helmkamp 2010-5-22 16082 El Dorado Sierra Nevada Mountains Foothills, at the junction of Perry Creek Road and Slug Gulch Road, 0.5 mi. northeast of the village of Fairplay 677 Comment
  UCR87509  Lithophragma parviflorum George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 16.1 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR235505  Lolium multiflorum George K. Helmkamp, E. A. Helmkamp 2012-5-15 18966 Calaveras Northern Sierra Nevada Mountains Foothills, along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas 387 Comment
  UCD66242  Lolium multiflorum var. multiflorum G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10128 Placer Northern Sierra Nevada Foothills: NE edge of Sacramento metropolitan area; Sierra College Road and King Ranch Road SSE of Rocklin. 122 Comment
  UCR134375  Lolium perenne George K. Helmkamp 2003-9-26 8182 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  UCR215910  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2009-6-29 15062 El Dorado Sierra Nevada Mountains Foothills, Ice House Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83 deg. ) of Pollock Pines 989 Comment
  UCR235380  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2012-4-17 18768 Yolo Sacramento Valley, along County Road 26, 1.4 miles west of its intersection with Road 89, c. 12 miles WSW of Woodland 65 Comment
  UCR238420  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2012-4-4 18712 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  SEINET273050  Lomatium utriculatum G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3652 Monterey Along CA Hwy 198 6.2 mi W of the King/Monterey County lines 503 Comment
  UCR140977  Lomatium utriculatum George K. Helmkamp 2004-4-23 8520 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd, 12.9 mi from Hwy-Calif. Hwy 154 at San Olivos jct. 1159 Comment
  UCR233667  Lomatium utriculatum George K. Helmkamp, E. A. Helmkamp 2011-6-9 17504 Nevada Northern Sierra Nevada Mountains Foothills, Tyler Foote Crossing Road, 3.0 miles north of its junction with Grizzly Hill Road, generally north of North Columbia 884 Comment
  UCR234191  Lonicera hispidula George K. Helmkamp, E. A. Helmkamp 2011-7-7 17651 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  UCR219011  Lonicera hispidula var. vacillans George K. Helmkamp, E. A. Helmkamp 2010-6-23 16339 Amador Sierra Nevada Mountains Foothills, Sutter Creek Road, 7.2 miles northeast of its junction with old CA-49 in Sutter Creek village 473 Comment
  UCR134443  Lonicera involucrata var. ledebourii George K. Helmkamp 2003-9-26 8174 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  UCR176284  Lotus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10412 Nevada Northern Sierra Nevada Foothills, along Calif. Hwy 49, 2.1 mi. N of the South Yuba River bridge 534 Comment
  UCR249169  Lotus argophyllus var. fremontii George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20789 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.8 miles west of Goodyears Bar, c. 5 miles west of Downieville 779 Comment
  UCR170796  Lotus corniculatus George K. Helmkamp, E. A. Helmkamp 2005-8-14 9815 El Dorado Northern Sierra Nevada Foothills, Diamond Springs. Lake Oaks mobile home park 521 Comment
  UCR230617  Lotus crassifolius var. crassifolius George K. Helmkamp, E. A. Helmkamp 2011-7-19 17845 Calaveras Northern Sierra Nevada Mountains, Forest Route 5N75, 1.1 miles west of Boards Crossing bridge over North Fork Stanislaus River 1220 Comment
  UCR207900  Lotus denticulatus George K. Helmkamp, E. A. Helmkamp 2009-4-22 14584 Placer Sierra Nevada Mountains Foothills, Forest Hill road near Grizzly Bear House, about one mile northeast of the road to the lower end of Clementine Lake 732 Comment
  UCR79305  Lotus heermannii George K. Helmkamp 1993-9-12 22- 09 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  UCR140488  Lotus humistratus George K. Helmkamp 2004-4-23 8535 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd., 15.0 mi NE of Los Olivos 1341 Comment
  UCR14938  Lotus nevadensis George K. Helmkamp 1975-10-4 s.n. Mariposa Beside Big Creek, below bridge in Fish Camp 1520 Comment
  RSA755838  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2009-8-6 15403 -A Amador Panther Creek Road, 0.4 mile south of its junction with CA-88; jct. is 4.0 miles NE of Cooks Station 1590 Comment
  RSA795036  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-8-6 17960 Amador Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  UCR176061  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2006-8-14 11255 Nevada Northern Sierra Nevada Mtns, about 0.7 mile east of Donner Pass along Donner Pass Road 2041 Comment
  UCR216045  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2009-6-29 15056 El Dorado Sierra Nevada Mountains Foothills, Ice House Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83 deg. ) of Pollock Pines 989 Comment
  CLARK-A1045-1009  Lotus oblongifolius George K. Helmkamp 1978-5-27 Inyo Owens Valley Inyo [Sawmill] Campground; wet area beside Creek; Aberdeen 7.5' Q Comment
  SEINET4178670 Image available Lotus oblongifolius George K. Helmkamp, E. A. Helmkamp 2010-9-1 16907 Amador Northern Sierra Nevada Mountains: Dufrene Road 0.7 mile east of it's junction with CA-88, north of Lower Bear River Reservoir. Peddler Hill 7.5' Quad 2044 Comment
  UCR232237  Lotus oblongifolius George K. Helmkamp, E. A. Helmkamp 2010-8-3 16709 Calaveras Northern Sierra Nevada Mountains, Forest Route 7N23 (Black Creek Road) 0.1 mile north of the junction with CA-4 2005 Comment
  UCR235143  Lotus oblongifolius George K. Helmkamp, William Barnes 2010-9-4 16922 El Dorado Northern Sierra Nevada Mountains, Mehrten Spring Rd and continuing on Cat Creek Rd., 4.7 miles northwest of CA-88; Middle Fork of Cosumnes River 1620 Comment
  RSA792065  Lotus oblongifolius var. oblongifolius George K. Helmkamp, E. A. Helmkamp 2012-7-2 19311 Amador Northern Sierra Nevada Mountains: Bear River Road, 0.1 miles east of the south end of the dam of Lower Bear River Reservoir. 1776 Comment
  UCR173987  Lotus oblongifolius var. oblongifolius George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10769 El Dorado Northern Sierra Nevada Mountains, about 1.3 miles north of Hwy US-50 on Wrights Lake Road 1677 Comment
  RSA756852  Lotus pinnatus George K. Helmkamp, E. A. Helmkamp 2009-7-16 15210 Placer Forest Hill Road, 24.6 miles northeast of the city of Foresthill, near Ford Point 1698 Comment
  UCR134434  Lotus procumbens var. procumbens George K. Helmkamp, E. A. Helmkamp 2001-4-29 6562 San Luis Obispo South Coast Range, Irish Hills, Clark Valley Road, 2.8 miles south of Los Osos Valley Road, east of Los Osos 91 Comment
  RSA755426  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2009-6-11 14980 Shasta Road 300, a side road without an official road sign, at the north side of CA-44; 9.7 miles east of Shingletown 1261 Comment
  RSA769902  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2009-8-28 15536 Sacramento along Latrobe Road, 1.1 miles west of the El Dorado County line, 3 mi. NE (36 deg ) of Rancho Murieta 140 Comment
  UCR115801  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2000-10-17 6223 San Diego Peninsular Range, Lawrence Welk Commercial Complex, c. 1.5 miles west of the Oat Hills, and south of Moosa Canyon 299 Comment
  UCR160570  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2005-6-7 9551 San Luis Obispo Outer South Coast Ranges, along Arroyo Grande to Huasna Road [beyond Huasna], 2.1 miles ENE of Huasna Township Road 253 Comment
  UCR170459  Lotus purshianus var. purshianus George K. Helmkamp, Elizabeth Helmkamp 2005-10-29 10007 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, 3 air mi N of Placerville]; 1.9 [road] mi east of Calif. Highway 193 along Rock Creek Road 381 Comment
  UCR201941  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-6 14201 Yuba Sacramento Valley, junction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst 24 Comment
  UCR233303  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-9-1 18212 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 4.7 miles south of its junction with US-50 in Kyburz, alongside Silver Fork American River 1500 Comment
  UCR233390  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-8-26 18170 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 0.4 miles west of Robinson Flat 2041 Comment
  UCR257214  Lotus purshianus var. purshianus George K. Helmkamp, Mary Alice Barnes 2013-5-17 20624 Calaveras Northern Sierra Nevada Mountains Foothills, Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs 279 Comment
  UCR121867  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 2001-3-24 6299 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  UCR130054  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 1998-5-21 4050 Los Angeles Western Mojave Desert/Transverse Range, junction of Munz Ranch Rd and Lake Elizabeth Rd., north of Lake Elizabeth 1006 Comment
  UCR140129  Lotus strigosus George K. Helmkamp 2004-3-13 8357 San Luis Obispo Central Coast, Nipomo Mesa, along Calif. Hwy 1 (Mesa View Dr.), 0.4 mi south of Halcyon Rd, south of Arroyo Grande 76 Comment
  UCR107371  Lotus wrangelianus George K. Helmkamp, E. A. Helmkamp 1998-5-14 3643 Monterey Coast Range, Peachtree Valley, along Calif. Hwy 198, 6.2 mi. west of the Fresno/Monterey County lines. 503 Comment
  SD257316  Ludwigia hexapetala George K. Helmkamp, Mary Alice Barnes 2013-5-8 20524 Yolo Southern Sacramento Valley: Yolo Bypass Wildlife Area, 0.9 mile southeast of the junction of Chiles Road and I-80, between Sacramento and Davis. (Davis 7.5'Q) 13 Comment
  UCR143567  Lupinus George K. Helmkamp, E. A. Helmkamp 2000-7-17 5846 Mono Sierra Nevada Mtns., W side of Lake Mary, SW of Mammoth Lakes 2720 Comment
  UCR130383  Lupinus albifrons George K. Helmkamp, E. A. Helmkamp 1998-5-21 4030 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  UCR161229  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2005-3-5 9036 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness N of Lopez Lake, Upper Lopez Canyon Road, 5.5 mi N of jct with Lopez Road 335 Comment
  UCR161894  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2005-3-14 9171 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 8.2 mi. NE of Los Olivos 488 Comment
  UCR173703  Lupinus albifrons var. albifrons George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10574 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road just north of Hwy US-50 1665 Comment
  UCR158386  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2004-6-20 8679 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR207885  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2009-4-22 14580 Placer Sierra Nevada Mountains Foothills, Forest Hill road near Grizzly Bear House, about one mile northeast of the road to the lower end of Clementine Lake 732 Comment
  UCR217914  Lupinus albifrons var. collinus George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16469 El Dorado Sierra Nevada Mountains, Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  UCR116695  Lupinus andersonii George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Calif. Hwy 38 near Heart Bar State Park 1982 Comment
  UCR175778  Lupinus angustiflorus George K. Helmkamp, E. A. Helmkamp 2006-7-7 10869 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  UCD106581  Lupinus apertus G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10906 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 6.1 miles north of Hwy US-50 at the junction with the road from Ice House Reservoir. 2030 Comment
  UCR122384  Lupinus arboreus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6999 Humboldt North Coast, north spit of Samoa Peninsula, 0.5 mi north of CA Hwy 255 bridge over Humboldt Bay 6 Comment
  UCR159325  Lupinus arboreus George K. Helmkamp, E. A. Helmkamp 2004-7-14 8765 Santa Barbara Southern Central Coast, Surf, NW of Lompoc 46 Comment
  UCR242373  Lupinus arbustus George K. Helmkamp, E. A. Helmkamp 2010-7-28 16673 Placer Northern Sierra Nevada Mountains, Soda Springs Road, 0.3 mile north of its junction with Forest Hill Road at Robinson Flat 2024 Comment
  UCD106793  Lupinus argenteus var. argenteus G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11151 Alpine Northern Sierra Nevada Mountains; Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake. 2509 Comment
  UCR123966  Lupinus argenteus var. argenteus George K. Helmkamp, E. A. Helmkamp 2001-7-6 6845 Alpine Sierra Nevada Mountains, Calif. Hwy 89, 7.1 mi west of US-395 2470 Comment
  UCR122320  Lupinus argenteus var. heteranthus George K. Helmkamp, E. A. Helmkamp 1997-9-10 2324 Mono Eastern Sierra Nevada Mtns./ Mono Basin, 4.9 mi. SE of Calif. Hwy 120 on Sagehen Meadows Road 2591 Comment
  UC2015621  Lupinus argenteus var. meionanthus G. Helmkamp 1995-9-23 3 -10 Alpine West side of Sonora Pass just beyond the Mono County line. Comment
  RSA794937  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2011-4-1 17115 Placer along CA-193 (Lincoln-New Castle Hwy), 0.4 mile west of Gold Hill Road, 5.4 miles (air) east of Lincoln 108 Comment
  SD241011  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2012-3-31 18668 Placer Northern Sierra Nevada Mountains Foothills: Old Foresthill Road, 0.7 mile northeast of its junction with CA-49 and the American River Crossing. 257 Comment
  UCD107025  Lupinus benthamii G. K. Helmkamp; E. A. Helmkamp 2007-4-5 11740 Amador Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City. 309 Comment
  UCD107026  Lupinus benthamii G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11827 Amador Northern Sierra Nevada Mountains: along CA E-16, 0.7 mile south of River Pines. 610 Comment
  UCR130229  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2001-4-27 6532 Kern Tehachapi Mtns., Western Foothills, Calif. Hwy 223 (Bear Mtn. Blvd.), 7.2 mi east of Arvin 366 Comment
  UCR207654  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2009-4-21 14520 El Dorado Sierra Nevada Mountains Foothills, junction of Rock Creek Road and CA-193, north of Chili Bar and the South Fork of the American River 390 Comment
  UCR208276  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2009-5-7 14644 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.9 miles east of its junction with Forest Hill Road in Foresthill 476 Comment
  UCR249887  Lupinus benthamii George K. Helmkamp, Mary Alice Barnes 2013-5-17 20645 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA Hwy 26, 0.4 mile northeast of its junction with Campo Seco Turnpike Road, SW of Mokelumne Hill 438 Comment
  SEINET3258016 Image available Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2008-5-4 13376 Amador Sierra Nevada Mountains; Barton, c. 15 miles (air) NE of Jackson, at the junction of Tiger Creek Road and Black Prince Road, 0.6 mil east of the junction of Tiger Creek Road with CA-88. 936 Comment
  SEINET3271563 Image available Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley; on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 Comment
  UCD107240  Lupinus bicolor G. K. Helmkamp 2004-3-15 8375 San Luis Obispo San Luis Obispo County: Central Coast; edge of Nipomo Mesa overlooking Cienaga Valley, along CA-1 (Mesa View Dr.), 0.3 mile north of Halcyon Road. 76 Comment
  UCD107242  Lupinus bicolor G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10357 Amador Northern Sierra Nevada Foothills: Along CA Hwy 88, 0.9 mi. S of the El Dorado County line at Enterprise. 274 Comment
  UCD107250  Lupinus bicolor G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11843 Calaveras Northern Sierra Nevada Mountains: Chili Gulch near McSorley Ranch, along Hwy. CA-49, 5.1 miles south of the Amador County line. 370 Comment
  UCR140155  Lupinus bicolor George K. Helmkamp 2004-3-13 8339 San Luis Obispo Central Coast, Nipomo Mesa, SE of Oceano, Mesa Dunes Mobile Home Park, along Mesa View Dr., 0.2 mi south of the jct of Halcyon Rd 76 Comment
  UCR158737  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2005-4-17 9367 San Luis Obispo Central Coast, Corbett Canyon, 2.3 miles north of Calif. Hwy 227 in Arroyo Grande 81 Comment
  UCR173598  Lupinus bicolor George K. Helmkamp, Elizabeth Helmkamp 2006-5-4 10294 El Dorado Northern Sierra Nevada Mountains Foothills, east end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Calif. Hwy 49 543 Comment
  UCR188016  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2007-5-1 11923 El Dorado Foothills, Northern Sierra Nevada Mountains, along Hwy CA-49 at the junction with Teal Road, 3.0 miles northwest of US-50 in Placerville 558 Comment
  UCR189493  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2007-3-22 11675 El Dorado Foothills, Northern Sierra Nevada Mountains, along Hwy CA-16 at the west slope of Mt. Aukum and 1.7 miles north of Mt. Aukum village 584 Comment
  UCR194908  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2007-5-26 12131 Yuba Northern Sierra Nevada Mountains Foothills, along CA-49, 1.3 miles south of Camptonville 802 Comment
  UCR253610  Lupinus bicolor George K. Helmkamp 2014-3-18 22571 San Joaquin San Joaquin Valley, along Hwy CA-88 on the southwest side of the border with Calaveras County, 7.1 mi. SW (220 deg. ) of Ione 87 Comment
  UCR257212  Lupinus bicolor George K. Helmkamp, Mary Alice Barnes 2013-5-13 20563 Amador Sierra Nevada Mountains Foothills, along E-16/Shenandoah Rd., 3.6 road miles south of River Pines, 4.15 air miles NE (39 deg. ) of Plymouth 517 Comment
  UCR258986  Lupinus bicolor George K. Helmkamp, Amy Barnes 2014-3-21 22617 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR132065  Lupinus chamissonis George K. Helmkamp 2003-7-29 8043 B San Luis Obispo Central Coast, 0.6 mi south of Nipomo Hill in Arroyo Grande area 46 Comment
  UCR110938  Lupinus concinnus George K. Helmkamp 1998-6-27 4097 Riverside Santa Rosa Mtns., 3.3 miles south of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail, FS Rd. 7S02), in vicinity of an unnamed spring 1585 Comment
  UCR122811  Lupinus concinnus George K. Helmkamp, E. A. Helmkamp 2001-3-31 6332 San Bernardino Eastern Mojave Desert, Goffs Rd, 8.1 mi east of Goffs 610 Comment
  UCR190595  Lupinus concinnus George K. Helmkamp, E. A. Helmkamp 2005-4-22 9400 San Luis Obispo Inner South Coast Ranges, Carrizo Highway at Mile-32, Calif. Hwy 58, east of Santa Margarita, beside Windmill Creek 509 Comment
  UCD107798  Lupinus fulcratus G. K. Helmkamp; E. A. Helmkamp 2006-8-24 11270 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 2.3 miles south of Union Reservoir Road. 1552 Comment
  UCR176026  Lupinus fulcratus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11033 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  UCR110991  Lupinus hyacinthinus George K. Helmkamp 1998-6-27 4124 Riverside Santa Rosa Mtns., 9 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), in vicinity of Santa Rosa Spring. 2232 Comment
  UCR163007  Lupinus latifolius subsp. latifolius George K. Helmkamp, E. A. Helmkamp 2005-4-6 9317 Santa Barbara Outer south coast ranges, Santa Ynez Mountains; San Miguelito Road at mile 3.7, SSW of Lompoc 221 Comment
  UCR115562  Lupinus latifolius subsp. parishii George K. Helmkamp, E. A. Helmkamp 2000-4-20 5389 San Luis Obispo Central Coast, Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
  RSA756760  Lupinus latifolius var. columbianus George K. Helmkamp, Amy Barnes 2009-7-8 15139 El Dorado Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, about 1.3 miles north of Ice House 1654 Comment
  SEINET6655409  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2007-5-26 12119 Nevada Northern Sierra Nevada Mountains Foothills: along CA-49; 1.2 miles north of North San Juan.; 0 1000 Comment
  UCR209028  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2009-8-19 15494 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  SD236289  Lupinus lepidus var. confertus G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13855 Alpine Eastern Sierra Nevada Mountains: Blue Lake Road just southeast of its junction with CA-88. 2180 Comment
  SD254617  Lupinus lepidus var. confertus George K. Helmkamp, Amy Barnes 2014-8-27 23030 Alpine Northern Sierra Nevada Mountains; West Fork Carson River canyon along CA 88/Carson Pass Hwy, 2.6 miles east of the junction with Hwy 89/Luther Pass Rd. 1994 Comment
  UCR176055  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2006-7-12 10963 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR188478  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2007-7-17 12526 Amador Northern Sierra Nevada Mountains, along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake 2317 Comment
  UCD108576  Lupinus lepidus var. sellulus G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12716 El Dorado Northern Sierra Nevada Mountains: Wright's Lake; south side of the lake at the entrance to the campground. 2131 Comment
  UCR176049  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11012 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR218104  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 2010-7-23 16618 El Dorado Northern Sierra Nevada Mountains, Forestry Route 42, 0.2 mile west of its junction with Wright's Lake Road and beside Silver Creek, 4 miles NE (31 deg. ) of Kyburz 2021 Comment
  UCR235132  Lupinus lepidus var. sellulus George K. Helmkamp, William Barnes 2010-9-4 16937 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR206281  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14722 Yolo Western Sacramento Valley, Capay Valley; along CA-16, 1.5 miles west of Capay 70 Comment
  UCR233052  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2011-5-21 17320 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 2.8 miles northeast of CA-49 in Mokelumne Hill 476 Comment
  UCR258384  Lupinus microcarpus var. densiflorus George K. Helmkamp 2014-5-21 22915 El Dorado Sierra Nevada Mountain Foothills, Bucks Bar Road, 0.8 mile northwest of the bridge over North Fork Cosumnes River 605 Comment
  SD237439  Lupinus nanus G. K. Helmkamp, E. A. Helmkamp 2010-4-23 15914 Placer Sierra Nevada Mountains Foothills: along Salmon Falls Road, 5.6 miles south of junction with CA-49 at Pilot Hill, 0.65 mil north of the American River crossing (Pilot Hill 7.5'Q) 199 Comment
  SD239746  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2012-6-13 19192 Nevada Northern Sierra Nevada Mountains Foothills: village of Washington, Relief Hill Road, 0.4 mile north of its junction with Maybert Road & NE of the bridge over the South Yuba River. 790 Comment
  SEINET13203106 Image available Lupinus nanus George K. Helmkamp 2014-1 22882 Calaveras Sierra Nevada Mountains Foothills: along CA-26, 2.6 miles northeast of CA-49 at Mokelumne Hill (Mokelumne Hill 7.5' Q.) 518 Comment
  SEINET3815513 Image available Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2012-5-11 18940 Placer Foothills, northern Sierra Nevada Mountains: Finning Mill Road at the junction with Forest Hill Road 346 Comment
  UCR100791  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 1998-4-7 3189 Kern 3 mi. north of Maricopa on Calif. Hwy 33 252 Comment
  UCR173613  Lupinus nanus George K. Helmkamp, Elizabeth Helmkamp 2006-5-6 10311 Amador Northern Sierra Nevada foothills, middle of the city Jackson, 0.1 mile north of the junction of Calif. Hwy 49 and Calif. Hwy 88 378 Comment
  UCR184964  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2007-4-23 11802 Amador Foothills, Northern Sierra Nevada Mountains, junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 Comment
  UCR217937  Lupinus nanus George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16143 El Dorado Sierra Nevada Mountains Foothills, along Perry Creek, about 0.2 mile south of Slug Gulch Road, at a point 4.7 miles east of junction with Perry Creek Road 1027 Comment
  UCR218133  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2010-6-26 16383 Placer Sierra Nevada Mountains Foothills, junction of Canyon Way and Yankee Jim's Road, east of I-80 between Weimar and Colfax 616 Comment
  UCR218180  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2010-5-31 16185 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 3.3 miles east of the village of Sutter Creek 413 Comment
  UCR230085  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2011-6-7 17484 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  CLARK-A1045-1144  Lupinus polyphyllus subsp. superbus George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCR242338  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2010-8-20 16805 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring area 2232 Comment
  SBBG128990  Lupinus polyphyllus var. burkei G. K. Helmkamp, E. A. Helmkamp 2011-9-13 18268 El Dorado Foster Meadow Rd, 0.6 mi N of its jct with CA-88 2136 Comment
  SBBG129047  Lupinus stiversii G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20876 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  UCR106066  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 1997-3-7 1380 Kern San Emigdio Ranch, SE portion 945 Comment
  UCR159230  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2005-4-22 9386 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR161245  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2005-1-1 8877 Santa Barbara Central Coast, N side Casmalia Hills, Corallitos Canyon along Brown Road, 3.5 mi west of Calif. highway 1. 146 Comment
  UCR104007  Lupinus truncatus George K. Helmkamp 1998-4-3 3085 Riverside Sonoran (Colorado) Desert, West Palm Springs Village area, vic. of Hwy I-10 & Verbenia Ave.; 4 mi. north of Tamarack Rd on Cottonwood Rd. 1280 Comment
  UCR115564  Lupinus truncatus George K. Helmkamp, E. A. Helmkamp 2000-4-20 5391 San Luis Obispo Central Coast, Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
  UCR140125  Lupinus truncatus George K. Helmkamp 2004-3-13 8343 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR173471  Luzula comosa George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10350 Amador Northern Sierra Nevada Foothills, ESE of Sacramento; 3.2 mi. east of Pine Grove along Calif. Hwy 88 841 Comment
  UCR246402  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2012-3-22 18631 Amador Northern Sierra Nevada Mountains Foothills, Bell Road, 1.2 miles east of CA-49 at private road to Rancho Cicada Retreat 371 Comment
  SD234741  Luzula macrantha G. K. Helmkamp, E. A. Helmkamp 2008-4-25 13307 El Dorado Sierra Nevada Mountains Foothills: junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Gergetown. 673 Comment
  UCR241966  Lycopus americanus George K. Helmkamp, E. A. Helmkamp 2012-9-15 19831 El Dorado Northern Sierra Nevada Mountains Foothills, Walton Lake; along Balderson Road, 0.4 mile south of its junction with Wentworth Springs Road 951 Comment
  SD143861  Lythrum hyssopifolia G. K. Helmkamp 1997-6-20 2049 San Luis Obispo Ca. 0.2 mile northeast of Buckskin and Martingale in Los Osos. Comment
  UCR241316  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2012-9-20 19879 Amador Northern Sierra Nevada Mountains Foothills, along Hwy E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  UCR100623  Machaeranthera canescens subsp. canescens George K. Helmkamp 1997-9-30 2480 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR115821  Machaeranthera canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2000-7-18 5866 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  UCR58304  Machaeranthera canescens subsp. canescens George K. Helmkamp 1989-10-7 s.n. Riverside San Jacinto Mtns, N slope of Thomas Mtn, 1 mi. SW of Hwy 74 on Thomas Mtn Road 1500 Comment
  JEPS119454  Madia citrigracilis George K. Helmkamp with E. A. Helmkamp 2011-8-6 18007 Amador Northern Sierra Nevada Mountains Foothills: Red Dog Road, 1.6 miles northeast of its junction with You Bet Road, 3 miles NE (313 deg. ) of Gold Run. Comment
  UCD134169  Madia citrigracilis G. K. Helmkamp; E. A. Helmkamp 2006-6-14 10703 Placer Northern Sierra Nevada Mountains: 0.2 mile N of Forest Hill Road on unnamed road to Lake Clementine (general area NE of Auburn on Forest Hill Divide). 487 Comment
  UCD134170  Madia citrigracilis G. K. Helmkamp; E. A. Helmkamp 2006-8-24 11269 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 2.3 miles south of Union Reservoir Road. 1552 Comment
  UCR200892  Madia citriodora George K. Helmkamp, E. A. Helmkamp 2008-9-18 14122 Nevada Foothills, northern Sierra Nevada Mountains, Tyler-Foote Road 5.0 miles northeast of the junction with CA-49 777 Comment
  UCD134215  Madia elegans G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13036 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road. 70 Comment
  JEPS119418  Madia elegans subsp. densifolia G. K. Helmkamp, E. A. Helmkamp 2009-6-6 14917 El Dorado Sierra Nevada Mountains Foothills, along Mosquito Road, 5.9 miles north of its junction with CA-50 in Placerville Comment
  RSA0093480  Madia exigua George K. Helmkamp, E. A. Helmkamp 2012-6-26 19281 Amador Northern Sierra Nevada Mountains. Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek. 1345 Comment
  UCR233117A  Madia exigua George K. Helmkamp, E. A. Helmkamp 2011-7-17 17747 Nevada Northern Sierra Nevada Mountains Foothills, Red Dog Road, 1.6 miles northeast of its junction with You Bet Road, 3 miles NE (313 deg. ) of Gold Run 867 Comment
  SBBG127570  Madia glomerata G. K. Helmkamp, E. A. Helmkamp 2009-7-30 15334 Calaveras Ganns Meadow Drive just S of its jct with CA-4, 16.7 mi NE of Arnold 2067 Comment
  SD243099  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2010-9-1 16874 Amador Northern Sierra Nevada Mountains Foothills:along CA-88, 2.6 miles southwest of its junction with Mormon Emigrant Trail, c. 2.75 mile NNW of Upper Bear River Reservoir (Bear River Reservoir 7.5'Q) 2162 Comment
  SEINET13276707 Image available Madia glomerata George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-1 19438 Sierra Northern Sierra Nevada Mountains: Henness Pass Road, 1.1 mile east of its junction with CA-89 at the north end of Kyburz Flat (Sardine Peak 7.5' Q.) 1907 Comment
  UCD134260  Madia glomerata G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10901 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 6.1 miles north of Hwy US-50 at the junction with the road from Ice House Reservoir. 2030 Comment
  UCR176220  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2006-8-3 11110 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR176293  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2006-7-28 11010 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR188507  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2007-7-17 12523 Amador Northern Sierra Nevada Mountains, along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake 2317 Comment
  JEPS119469  Madia gracilis George K. Helmkamp with E. A. Helmkamp 2010-8-7 16727 El Dorado nSNH: Silver Fork Road, 0.4 mi east of its junction with Mormon Emigrant rail, at Jim Quinn Spring. Comment
  OBI82143  Madia gracilis George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 21096 El Dorado Northern Sierra Nevada Mountains; Hell's Delight Road, just west of the junction with Silver Fork Road, 2.8 miles north of CA-88. 2006 Comment
  SD236215  Madia gracilis G. K. Helmkamp, Elizabeth Helmkamp 2008-6-3 13557 El Dorado Sierra Nevada Mountains: Pony Express Trail, 0.8 mile east of Sly Park Road (Pollock Pines) and parallel to US-50 (Pollock Pines 7.5'Q) 1213 Comment
  SD236218  Madia gracilis G. K. Helmkamp 2008-6-17 13672 Amador Northern Sierra Nevada Mountains: Bear River Reservoir Road, 0.1 mile south of its junction with CA-88 (Peddler Hill 7.5'Q) 1990 Comment
  SEINET2442644  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-8-6 15400 Amador Sierra Nevada Mountains: Panther Creek Road, 0.4 mile south of its junction with CA-88; jct. is 4.0 miles NE of Cook's Station (Peddler Hill 7.5' Q.).; 0 1590 Comment
  UCR122882  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2001-5-29 6698 San Benito Coast Range, San Andrea Rift Zone, Coalinga Road. about 2 miles southeast of Hernandez [7.26 mi southeast of Hernandez Reservoir] 732 Comment
  UCR160733  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2005-6-5 9516 Monterey Central Coast, west edge of Santa Lucia Range, overlooking Pacific Ocean, 0.4 mi east of Calif. Hwy 1 along Los Burros Road 113 Comment
  UCR163786  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2005-3-31 9282 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. 14.0 mi NE of Los Olivos along Figueroa Mountain Road 1000 Comment
  UCR171195  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2005-7-31 9743 El Dorado Northern Sierra Nevada Foothills, 20 mi WSW of Lake Tahoe; Ice House Road, N of Calif. Highway 50 and 1.5 mi south of junction with Ice House Reservoir 1637 Comment
  UCR241360  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2012-6-26 19262 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.9 mile south of its junction with CA-88, S of Hwy 88/Carson Pass Hwy. and W of Lower Bear Reservoir 1617 Comment
  UCR257607  Madia gracilis George K. Helmkamp, Amy Barnes 2014-5-8 22834 Amador Sacramento Valley/Sierra Nevada Foothills, Tonzi Road, 0.4 mile east of its junction with CA-124, 4.5 air miles NE (35 deg. ) of Ione 188 Comment
  UCR262003  Madia gracilis George K. Helmkamp, Amy Barnes 2014-10-10 23159 El Dorado Northern Sierra Nevada Mountains, along CA-89, 0.6 mile northwest of Luther Pass 2378 Comment
  SD239512  Maianthemum racemosum G. K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18038 Tuolumne Northern Sierra Nevada Mountains: Forest Route 5N14, 5.0 miles north of Boards Crossing of the North Fork Stanislaus River (Boards Crossing 7.5'Q) 1716 Comment
  UCR118293  Malacothrix coulteri George K. Helmkamp, E. A. Helmkamp 1998-4-19 3364 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  SD224860  Malacothrix glabrata G. K. Helmkamp 1998-4-4 3140 Riverside Southern Mojave Desert: junction of CA hwy 62 (Twentynine Palms hwy) and CA hwy 177 (Desert Center-Rice Rd.) 456 Comment
  UCR134379  Malacothrix incana George K. Helmkamp 2003-9-26 8171 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  UCR18372  Malacothrix incana George K. Helmkamp 1975-11-16 s.n. San Luis Obispo Montana de Oro State Park Comment
  SEINET1004418  Marah fabacea George K. Helmkamp 2004-1 8278 San Luis Obispo Central Coast: Nipomo Mesa, Pomeroy Rd, 0.2 mi N of Willow Rd. 130 Comment
  UCR107350  Matricaria matricarioides George K. Helmkamp, E. A. Helmkamp 1998-5-14 3624 Fresno Coast Range, Warthan Creek Canyon, along Calif. Hwy 198, 27.6 mi. west of Interstate 5, west of Coalinga 457 Comment
  UCR140469  Matricaria matricarioides George K. Helmkamp 2004-3-13 8347 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR222540  Matricaria matricarioides George K. Helmkamp, E. A. Helmkamp 2010-4-17 15885 El Dorado Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 1.9 miles southwest of its junction with CA-49 near Pilot Hill 314 Comment
  UCR237320  Matricaria matricarioides George K. Helmkamp, E. A. Helmkamp 2012-4-14 18740 Butte Northern Sacramento Valley, Middle Honcut Road, 1.5 miles east of CA-70, ESE of Gridley 18 Comment
  UCR61723  Meconella linearis George K. Helmkamp 1990-4-19 s.n. San Luis Obispo Central Coast Range, State Hwy 58 at Parkhill Road, c. 3 mi northeast of Santa Margarita 367 Comment
  RSA0047748  Medicago lupulina George K. Helmkamp, Mary Alice Barnes 2013-5-10 20532 El Dorado Wentworth Springs Road, 3.4 miles east of Georgetown 983 Comment
  RSA0057870  Medicago lupulina George K. Helmkamp, E. A. Helmkamp 2013-11-9 22474 Calaveras Gwin Mine Road, 1.3 rd. miles north of Paloma Rd. at Paloma, 3.3 miles SW (242 deg air) of Mokelumne Hill 384 Comment
  UCR250619  Medicago lupulina George K. Helmkamp, Mary Alice Barnes 2013-5-10 20532 El Dorado Northern Sierra Nevada Mtns. Foothills, Wentworth Springs Road, 3.4 miles east of Georgetown 983 Comment
  SD241814  Medicago polymorpha G. K Helmkamp, E. A. Helmkamp 2010-4-17 15879 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, 1.9 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q) 313 Comment
  SEINET3411996 Image available Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2012-4-4 18672 Calaveras Northern Sierra Nevada Mountains Foothills: along CA-26, 0.6 mile NE of it junction with Paloma Road, 4.5 km SW (213 degrees) of Mokelumne Hill 489 Comment
  UCD107835  Medicago polymorpha G. K. Helmkamp; E. A. Helmkamp 2007-5-7 11943 El Dorado Northern Sierra Nevada Mountains: Pedro Hills Road, 0.3 mile west of the junction with CA-49, junction 5.3 miles south of Cool. 299 Comment
  UCR140408  Medicago polymorpha George K. Helmkamp 2004-2-19 8302 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park, along Mesa View Dr (Calif. Hwy 1), 0.2 mi south of the jct with Halcyon Rd. 61 Comment
  UCR238440  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2012-4-4 18694 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR170663  Mentha pulegium George K. Helmkamp, E. A. Helmkamp 2005-8-14 9810 El Dorado Northern Sierra Nevada Foothills, Diamond Springs. Lake Oaks mobile home park 521 Comment
  RSA0035746  Mentha spicata var. spicata George K. Helmkamp, Elizabeth A. Helmkamp 2013-9-13 22291 Amador Volcano Road; 0.1 mile northwest of the village of Volcano 671 Comment
  UCR245728  Mentha spicata var. spicata George K. Helmkamp, Amy Barnes 2013-9-24 22377 Calaveras Northern Sierra Nevada Mountains, north end of White Pine Reservoir, 0.6 mile north of Arnold 1186 Comment
  UCR104789  Mentzelia albicaulis George K. Helmkamp 1998-4-4 3126 San Bernardino Mojave Desert, S edge of Cadiz Dry Lake, 13.1 mi. north of mile-marker 76 on Calif. hwy 62 (Twentynine Palms Hwy), east of Twentynine Palms 183 Comment
  UCR157831  Mentzelia dispersa George K. Helmkamp, E. A. Helmkamp 1998-6-29 4151 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR13862  Mentzelia montana George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River, c. 1-1.5 miles upstream from Big Springs [near Arcularius Ranch] 2195 Comment
  UCR130245  Mentzelia veatchiana George K. Helmkamp, E. A. Helmkamp 2001-4-27 6500 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  SD240926  Mertensia ciliata George K Helmkamp, E. A. Helmkamp 2010-7-23 16617 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42, 0.2 mile west of its junction with Wright's Lake Road and beside Silver Creek, 4 miles NE (31a^z) of Kyburz (Kyburz 7.5'Q) 2021 Comment
  UCD134486  Micropus californicus G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11892 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR106468  Micropus californicus George K. Helmkamp, E. A. Helmkamp 1998-5-13 3575 Tulare Sierra Nevada Foothills, 11.5 mi east of Fountain Springs along Hot Springs Road 808 Comment
  CAS-BOT-BC228613  Micropus californicus var. californicus George K. Helmkamp; E. A. Helmkamp 2011-6-7 17486 Amador Northern Sierra Nevada Mountains Foothills: Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCD134485  Micropus californicus var. californicus G. K. Helmkamp; E. A. Helmkamp 2007-4-5 11735 Amador Northern Sierra Nevada Mountains, Sutter to Ione Road. 0.4 mile east of CA-49, northeast of Ione. 180 Comment
  UCR159427  Micropus californicus var. californicus George K. Helmkamp, E. A. Helmkamp 2005-5-12 9426 Monterey Central Coast Ranges, 8 mi west of US-101 on Calif. Highway G18 in Hames Valley 341 Comment
  RSA614975  Microsteris gracilis subsp. humilis George K. Helmkamp, E. A. Helmkamp 1998-4-8 3243 San Luis Obispo Soda Lake Rd at Arrowbear Trail (vic. of California Valley, ca. 5 mi. NW of Soda Lake) 610 Comment
  RSA792069  Mimulus George K. Helmkamp, E. A. Helmkamp 2012-7-14 19385 Amador Northern Sierra Nevada Mountains: Shot Rock Vista Rest Stop along CA-88 (Carson Pass Highway), 1 mile west of junction with Mormon Emigrant Trail. 2329 Comment
  CLARK-A1045-496  Mimulus androsaceus George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north of Baldwin Lake and State Highway 38 [18?]; sagebrush scrub area; drying flat; ; Big Bear City 7.5'Q 2133 Comment
  UCD122211  Mimulus aurantiacus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10400 Nevada Northern Sierra Nevada Foothills, CA Hwy 49 at the crossing of the South Yuba River (N of Nevada City). 402 Comment
  UCR122130  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2000-4-21 5446 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  UCR130080  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2001-5-30 6741 Santa Clara South Coast Range, Santa Clara Valley, Gilroy Hot Springs Rd., 0.5 mile south of springs at Coyote Creek 183 Comment
  UCR173531  Mimulus aurantiacus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10400 Nevada Northern Sierra Nevada Foothills, Calif. Hwy 49 at the crossing of the South Yuba River (N of Nevada City) 402 Comment
  UCR201724  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2008-10-23 14277 Amador San Joaquin Valley, Comanche Parkway 0.1 mile east of the junction with Coal Mine Road, north of Comanche Reservoir 137 Comment
  UCR222571  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2010-4-17 15891 Placer Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 7.3 miles southwest of its junction with CA-49 near Pilot Hill 332 Comment
  UCR237380  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2012-6-13 19164 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  RSA794914  Mimulus bicolor George K. Helmkamp, E. A. Helmkamp 2011-8-6 17957 Amador Ellis Road, 2.1 miles south of its junction with CA-88. 1794 Comment
  RSA0012226  Mimulus breweri George K. Helmkamp, E. A. Helmkamp 2011-7-19 17827 -A Tuolumne Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River. 1367 Comment
  UCR197642  Mimulus breweri George K. Helmkamp, E. A. Helmkamp 2008-6-23 13746 Amador Northern Sierra Nevada Mountains, Dufrene Road, 1.5 miles south of its junction with CA-88, jct. between Mormon Emigrant Trail and Bear Valley Reservoir Road 2021 Comment
  UCR101801  Mimulus cardinalis George K. Helmkamp, E. A. Helmkamp 1998-8-17 4443 Riverside Santa Ana Mtns., San Juan Canyon along the Ortega Hwy (Calif. Hwy 74) beside the Orange Co. line 503 Comment
  CLARK-A1045-158  Mimulus floribundus George K. Helmkamp 1978-6-1 Riverside Santa Ana Mountains vernal pool near origin of creek; Wildomar 7.5'Q Comment
  CLARK-A1045-461  Mimulus floribundus George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains beside Forest Service road 3N66Y, north of 3N08, where road crosses strem bed; along creek; ; Big Bear City 7.5'Q 2285 Comment
  UCR166143  Mimulus floribundus George K. Helmkamp, E. A. Helmkamp 1995-6-21 95-5- 11 Mariposa Sierra Nevada Mtns. Foothills, roadside cut along CA Hwy 49 at Hell Hollow, 1.5 mi south of the Merced River crossing 579 Comment
  UCR37638  Mimulus floribundus George K. Helmkamp 1984-5-5 E 10 Riverside Transverse Range, Little San Bernardino Mountains, Big Morongo Canyon, 4 road miles below the caretaker's house at the Big Morongo Preserve 549 Comment
  UCR118339  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2000-9-2 5966 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon, 2.2 mi west of Los Osos Valley Road 137 Comment
  UCR171035  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2005-7-31 9721 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR173493  Mimulus guttatus George K. Helmkamp, Elizabeth Helmkamp 2006-4-29 10273 El Dorado Northern Sierra Nevada Foothills, Rock Creek Road, 5.7 mi. east of Calif. Hwy 193, N of the South Fork of the American River 427 Comment
  UCR193109  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2007-6-12 12350 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road 0.6 mile north of Hwy CA-20, at the border of Placer Co. 1387 Comment
  UCR194697  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2007-5-30 12210 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.5 miles east of its junction with Forest Hill Road in Foresthill 488 Comment
  UCR217403  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2010-6-14 16293 El Dorado Sierra Nevada Mountains Foothills, Fairplay Road, 0.3 mile west of its junction with Scorpi Lane, 1.15 air mi. NW (293 deg. ) of Fair Play 668 Comment
  UCR217928  Mimulus guttatus George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16149 El Dorado Sierra Nevada Mountains Foothills, along Perry Creek, about 0.2 mile south of Slug Gulch Road, at a point 4.7 miles east of junction with Perry Creek Road 1027 Comment
  UCR233419  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2011-6-9 17527 Nevada Northern Sierra Nevada Mountains Foothills, Tyler Foote Crossing Road, 3.3 miles north of its junction with Grizzly Hill Road, NE of North Columbia near the Sierra Co. line/Middle Yuba River 878 Comment
  UCR250087  Mimulus guttatus George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20210 Calaveras Eastern San Joaquin Valley, Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  UCR257208  Mimulus guttatus George K. Helmkamp 2014-5-17 22907 Calaveras Sierra Nevada Mountains Foothills, Happy Valley, just east of Mokelumne Hill, along CA-26 at the west junction with Jesus Maria Road 524 Comment
  UCR176244  Mimulus jepsonii George K. Helmkamp, E. A. Helmkamp 2006-7-7 10842 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  RSA0042077  Mimulus kelloggii George K. Helmkamp, Mary Alice Barnes 2013-4-18 20346 Placer Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 ) of Colfax 561 Comment
  RSA0013401  Mimulus mephiticus George K. Helmkamp, E. A. Helmkamp 2012-7-2 19305 Amador Bear River Road at the south end of the dam of Lower Bear River Reservoir 1774 Comment
  UCR242327  Mimulus mephiticus George K. Helmkamp, E. A. Helmkamp 2010-7-28 16679 Placer Northern Sierra Nevada Mountains, Forest Hill Road, 1.8 miles east of Forest Route 13/American Hill Road 1662 Comment
  SEINET3245942  Mimulus moschatus G. K. Helmkamp, E. A. Helmkamp 2010-1 16513 Los Angeles Northern Sierra Nevada Mountains: between the west shore of Silver lake and CA-88; lakeside rest stop area (Tragedy Spring 7.5') 2234 Comment
  UCR200894  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2008-8-30 14058 Amador Northern Sierra Nevada Mountains, along Cole Creek Road near the crossing of Cole Creek 6.8 miles east of the Bear River Reservoir dam 1857 Comment
  UCR206777  Mimulus moschatus George K. Helmkamp, Amy Barnes 2009-7-8 15136 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, about 1.3 miles north of Ice House 1654 Comment
  UCR249141  Mimulus moschatus George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20765 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  UCR110973  Mimulus parishii George K. Helmkamp 1998-6-27 4100 Riverside Santa Rosa Mtns., 3.3 miles south of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail, FS Rd. 7S02), in vicinity of an unnamed spring 1585 Comment
  UCR110957  Mimulus pilosus George K. Helmkamp 1998-6-27 4104 Riverside Santa Rosa Mtns., 3.3 miles south of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail, FS Rd. 7S02), in vicinity of an unnamed spring 1585 Comment
  CLARK-A1045-377  Mimulus purpureus George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains just west of Stanfield cut-off, south side of lake; tree-covered knoll; ; Big Bear Lake 7.5'Q 2133 Comment
  RSA0013373  Mimulus tilingii George K. Helmkamp, E. A. Helmkamp 2010-9-1 16877 Amador Northern Sierra Nevada Mountains: along CA-88, 2.6 miles southwest of its junction with Mormon Emigrant Trail, e. 2.75 mi NNW of Upper Bear River Reservoir. 2162 Comment
  RSA795349  Mimulus tilingii George K. Helmkamp, E. A. Helmkamp 2011-8-19 18135 Alpine Blue Lakes Road, 1.4 miles north of its junction with Tamarack Road. 2506 Comment
  UCR103536  Mimulus tilingii George K. Helmkamp, E. A. Helmkamp 1997-9-11 2401 Alpine Sierra Nevada Mountains, 0.2 mi northwest of Sonora Pass along CA Hwy 108 2912 Comment
  UCR229427  Mimulus tilingii George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18030 Tuolumne Northern Sierra Nevada Mountains, Forest Route [5N14], 3.8 miles [northeast] of Boards Crossing of the North Fork Stanislaus River 1503 Comment
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Jun 12 2016
  UCR234575  Mimulus tilingii George K. Helmkamp, E. A. Helmkamp 2011-8-19 18135 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 1.4 miles north of its junction with Tamarack Road 2506 Comment
  UCR256500  Mimulus tilingii George K. Helmkamp, Amy Barnes 2014-5-8 22859 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 0.2 mile east of old CA-49 in town of Sutter Creek 375 Comment
  RSA781314  Mimulus torreyi George K. Helmkamp, E. A. Helmkamp 2009-7-22 15254 El Dorado Wrights Lake Road, 2.7 miles north of its junction with US-50, c. 0.25 mi. due S of Chimney Flat 2000 Comment
  UCD122932  Mimulus torreyi G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10885 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 6.1 miles north of Hwy US-50; at the junction with the road from Ice House Reservoir. 2029 Comment
  UCR229473  Mimulus torreyi George K. Helmkamp, E. A. Helmkamp 2011-7-26 17874 Nevada Northern Sierra Nevada Mountains, along CA Hwy 20, 0.8 mi. east of Bowman Lake Road, 1.23 mi. NE (50 deg. ) of Emigrant Gap and 0.35 mi. N of I-80 1541 Comment
  UCR130996  Mirabilis bigelovii var. bigelovii George K. Helmkamp, E. A. Helmkamp 1998-5-3 3513 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  CLARK-A1045-767  Mirabilis bigelovii var. retrorsa George K. Helmkamp 1977-11-5 San Bernardino Morongo Valley at north edge of Morongo Valley beside State Highway 62; creosote bush scrub; Morongo Valley 7.5'Q Comment
  UCR30085  Mohavea confertiflora George K. Helmkamp 1983-4-5 483- 9 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  CAS-BOT-BC523888  Mollugo verticillata George K. Helmkamp; E. A. Helmkamp 2012-10-1 19943 Sacramento Eastern Sacramento Valley: Latrobe Rd, 2.4 mi W of the El Dorado Co. line, N of Rancho Murieta 73 Comment
  SD143870  Monardella odoratissima G. E. Helmkamp 1997-9-11 2384 Mono Along highway CA-120 0.5 miles N of Tioga Pass; Nunatak meadow area 2956 Comment
  SD248449  Monardella odoratissima George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20914 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, north side of its junction with Mormon Emigrant Trail (Tragedy Spring 7.5'Q) 2188 Comment
  SEINET3260242 Image available Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2008-8-8 13999 Alpine Northern Sierra Nevada Mountains; along Blue Lake road, 8.5 miles south of its junction with CA-88. 2497 Comment
  UCR175704  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2006-7-10 10929 El Dorado Northern Sierra Nevada Mountains, 1.1 miles west of Silver Creek along the road from Ice House Reservoir to Wright's Lake 2043 Comment
  UCR216046  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2009-7-30 15352 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR219050  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2010-7-13 16518 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  UCR257732  Monardella odoratissima subsp. pallida George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19518 Placer Northern Sierra Nevada Mountains, Sugar Bowl Road, 0.4 mile south of its junction with Donner Pass Road, just west of Lake Mary 2136 Comment
  UCR104814  Monardella villosa subsp. obispoensis George K. Helmkamp 1997-6-21 2060 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 Comment
  UCR122989  Monolopia lanceolata George K. Helmkamp, E. A. Helmkamp 2001-5-2 6642 Kern Temblor Range, [dirt road 0.45 km south of] Calif. Hwy 58, very near the San Luis Obispo Co. line 427 Comment
  UCR103332  Monoptilon bellidiforme George K. Helmkamp 1998-3-30 3060 San Bernardino Mojave Desert, E of town of Joshua Tree & south of Copper Mtn, 0.4 mi. east of the S end of Kerr Rd near Joshua Tree National Park 884 Comment
  SD224862  Monoptilon bellioides G. K. Helmkamp 1998-4-4 3165 Riverside Colorado Desert: 7.1 mi. N of Hwy I-10 on Eagle Mtn Rd, to the vicinity of the pumping station. 305 Comment
  UCR50456  Monoptilon bellioides George K. Helmkamp 1988-2-28 30 Imperial Sonoran (Colorado) Desert, at end of a dirt road c. 2 miles WSW of Crucifixion Thorn Natural Area, SE of Ocotillo and SW of Hwy 98 153 Comment
  CLARK-A1045-28  Monoptilon bellioides George K. Helmkamp 1977-4-24 Inyo Panamint Mountains east of Townes Pass; 1462 Comment
  RSA0035520  Montia parvifolia George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-5 20759 Sierra Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  SEINET1907216  Montia parvifolia G. K. Helmkamp, Elizabeth A. Helmkamp 2006-1 10556 El Dorado Northern Sierra Nevada foothills; Along Hwy US-50 at Bridal Veil Falls, east of Pacific House. 100 Comment
  UCR230992  Montia parvifolia George K. Helmkamp, E. A. Helmkamp 2011-6-9 17537 Sierra Northern Sierra Nevada Mountains Foothills, 5.9 miles north of Camptonville along CA-49, about 1.2 miles northeast of the Yuba Co. line 899 Comment
  UCR237715  Montia parvifolia George K. Helmkamp, E. A. Helmkamp 2012-7-2 19298 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam of Lower Bear River Reservoir 1774 Comment
  UCR197584  Morus alba George K. Helmkamp, E. A. Helmkamp 2008-5-30 13547 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs; corner of Patterson Dr. and CA-49 530 Comment
  RSA0011984  Muhlenbergia andina George K. Helmkamp, E. A. Helmkamp 2011-9-1 18229 El Dorado Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR61174  Muhlenbergia asperifolia George K. Helmkamp 1985-8-21 885- 28 Mono Owens Valley, along Owens River Road, 3 miles north of Lake Crowley 2073 Comment
  UCD86617  Muhlenbergia filiformis G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11261 Nevada Northern Sierra Nevada Mountains: about 0.7 mile east of Donner Pass along Donner Pass Rd. 2040 Comment
  UCR201742  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2008-8-1 13944 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road at Lyons Creek, 4.0 miles north of CA-50 2043 Comment
  SEINET13384144 Image available Muhlenbergia richardsonis George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-1 19475 Sierra Northern Sierra Nevada Mountains: Little Truckee River valley along Hwy CA-89, 3.5 road miles north of the Nevada County line, 9.6 air miles SE (136 deg. ) of Sierraville 1878 Comment
  UCD86921  Muhlenbergia richardsonis G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11252 Nevada Northern Sierra Nevada Mtns.: about 0.7 mile east of Donner Pass along Donner Pass Rd. 2041 Comment
  UCR132021  Myoporum laetum George K. Helmkamp 2003-11-22 8221 San Luis Obispo Central Coast, base of Nipomo Mesa on unnamed road 0.1 mi SW of Halcyon Rd at the railroad crossing, just south of Arroyo Grande 15 Comment
  CAS-BOT-BC478185  Myosotis laxa G. K. Helmkamp; E. A. Helmkamp 2009-6-11 14961 Shasta Southern Cascade Mountains: McCumber Lake Road, at the south end of McCumber Lake and 3.3 miles northeast of its junction with CA-44 1099 Comment
  RSA0064547  Myosotis laxa George K. Helmkamp, E. A. Helmkamp 2007-6-20 12389 El Dorado Along Mormon Emigrant Trail, 17.2 miles ESE of its junction with Sly Park Road at Jenkinson Lake 2128 Comment
  SD224992  Nama demissa var. demissa G. K. Helmkamp 1998-3-30 3046 San Bernardino Mojave Desert: vicinity of Twentynine Palms; Encelia Rd, 1.0 mi. N of CA hwy 62. 792 Comment
  SD243156  Nama lobbii George K. Helmkamp, E. A. Helmkamp 2011-9-24 18323 El Dorado Northern Sierra Nevada Mountains: Loon Lake [Ice House] Road, 2.7 miles NNE of its junction with Wentworth Springs Road. Base of ridge and roadside. 1883 Comment
  UCR29819  Nama pusilla George K. Helmkamp 1983-3-24 383- 9 Riverside Sonoran (Colorado) Desert, north base of the Little Chuckwalla Mountains, 1.5 miles east of Graham Pass Road 336 Comment
  UCR233246  Navarretia intertexta subsp. intertexta George K. Helmkamp, E. A. Helmkamp 2011-7-12 17698 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  SD239874  Navarretia leptalea subsp. leptalea G. K. Helmkamp, E. A. Helmkamp 2007-8-1 12664 Nevada Northern Sierra Nevada Mountains: near Camp Spaulding; along Lake Spaulding Road 0.4 mile north of its junction with CA-20 (Blue Canyon 7.5'Q) 1573 Comment
  SD239875  Navarretia leptalea subsp. leptalea G. K. Helmkamp, E. A. Helmkamp 2011-7-12 17736 Calaveras Sierra Nevada Mountains: Winton Road (Forest Route 7N03), 16.2 miles east of its junction with CA-26 in West Point (Garnet Hill 7.5'Q) 1668 Comment
  UCD118235  Navarretia squarrosa G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12588 El Dorado Northern Sierra Nevada Mountains: Traverse Creek Road at the crossing of Traverse Creek; about 2 miles southeast of its junction with CA-193. 732 Comment
  UCR101131  Nemacladus orientalis George K. Helmkamp, E. A. Helmkamp 1998-3-19 2949 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  UCR92485  Nemacladus orientalis George K. Helmkamp 1995-3-16 s.n. Riverside Sonoran (Colorado) Desert, Below Coxcomb Mtns., west of Rice Rd., 10.3 mi. NE of Desert Center 200 Comment
  RSA519024  Nemacladus tenuis var. aliformis George K. Helmkamp 1986-4-7 757 Riverside Canyon Just E of and parallel to Hwy 62, above Indian Ave. BLM Land. 579 Comment
  SD257289  Nemophila heterophylla George K. Helmkamp, Elizabeth Helmkamp 2013-5-2 20450 El Dorado Sierra Nevada Mountains Foothills: Happy Valley Road, 0.6 mile east of its junction with Mt. Aukum road, 1.65 air miles NE (72a^z) of Somerset (Camino 7.5'Q) 665 Comment
  UCR194876  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2007-5-26 12124 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of North San Juan 610 Comment
  UCR194912  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2007-5-26 12134 Yuba Northern Sierra Nevada Mountains Foothills, along CA-49, 1.3 miles south of Camptonville 802 Comment
  UCR218144  Nemophila heterophylla George K. Helmkamp, Amy Barnes 2010-5-7 15993 Calaveras Sierra Nevada Mountains Foothills, Michel Road, 0.1 mile east of its junction with Mountain Ranch Road. 5.2 mi. east (92.5 deg. ) of San Andreas 512 Comment
  UCR230149  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2011-5-21 17351 Calaveras Northern Sierra Nevada Mountains Foothills, Railroad Flat Road at junction with Wharregard Road and beside Esperanzo Creek, 8.3 miles NW (289 deg. ) of Arnold 759 Comment
  UCD120251  Nemophila menziesii var. menziesii G. K. Helmkamp; Elizabeth Helmkamp 2006-4-20 10204 El Dorado Northern Sierra Nevada: Between N and Middle forks of Cosumnes River; junction of Sand Ridge Road and Cutaway Lane, 2.1 mi SW of Somerset. 665 Comment
  UCR173607  Nemophila menziesii var. menziesii George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10170 Amador Northern Sierra Nevada Foothills, E of Sacramento, SW of Shenandoah Valley; along Calif. Hwy 49, c. 4.5 mi north of Plymouth 341 Comment
  UCR207868  Nemophila parviflora var. austiniae George K. Helmkamp, E. A. Helmkamp 2009-5-14 14694 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCR208279  Nemophila parviflora var. austiniae George K. Helmkamp, E. A. Helmkamp 2009-5-7 14633 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 13.6 miles east of its junction with Forest Hill Road in Foresthill 771 Comment
  UCR218142  Nemophila parviflora var. parviflora George K. Helmkamp, Amy Barnes 2010-5-7 16002 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  UCD119945  Nemophila pulchella G. K. Helmkamp; Elizabeth Helmkamp 2006-4-29 10278 El Dorado Northern Sierra Nevada: Rock Creek Road, 5.7 mi. E of CA Hwy 193, N of the South Fork of the American River. 427 Comment
  CAS-BOT-BC226807  Nemophila pulchella var. fremontii George K. Helmkamp; E. A. Helmkamp 2011-4-12 17177 El Dorado Foothills Northern Sierra Nevada Mountains: Placerville, along Forni Road, 0.2 mile northwest of its Weber Creek crossing, SE of Hwy 50 near Diamond Springs 488 Comment
  UCR198563  Nemophila pulchella var. gracilis George K. Helmkamp, E. A. Helmkamp 2008-3-12 13168 Amador Sierra Nevada Mountains Foothills, Middle Bar Road, 3.7 miles south of its junction with CA-49 just south of Jackson 345 Comment
  UCD119955  Nemophila spatulata G. K. Helmkamp; Elizabeth Helmkamp 2007-6-20 12406 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail 2.0 miles west of its junction with Hwy CA-88 and at Singleton Springs. 2247 Comment
  UCR245582  Nepeta cataria George K. Helmkamp, Amy Barnes 2013-9-24 22347 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCR261623  Nepeta cataria George K. Helmkamp, Amy Barnes 2014-9-16 23100 Alpine Eastern Sierra Nevada Mountains, Carson Valley, 1.35 mi. NE of Paynesville at junction of Fredericksburg Lane and US-88 (Carson Pass Hwy), 2.8 miles northeast of Woodfords 1340 Comment
  SEINET3246140  Nicotiana acuminata var. multiflora G. K. Helmkamp, E. A. Helmkamp 2009-1 15664 El Dorado Sierra Nevada Mountains Foothills: Cedar Ravine Road at the junction with Camp Nauvoo Road, 0.1 mile south of Weber Creek and c. 2.5 mi. SE of Placerville. 567 Comment
  UCR18548  Oenanthe sarmentosa George K. Helmkamp 1974-9-28 s.n. San Luis Obispo Central Coast, Morro Bay area, Hazard Cyn, near ocean 34 Comment
  RSA615333  Oenothera deltoides subsp. deltoides George K. Helmkamp, E. A. Helmkamp 1998-2-18 2689 Riverside Colorado Desert: Midland Road, 3.8 miles SE of Midland, Little Maria Mountains Comment
  UCD106937  Oenothera elata subsp. hirsutissima G. K. Helmkamp; E. A. Helmkamp 2007-8-30 12846 El Dorado Northern Sierra Nevada Mountains: Along Hwy CA-49 at the southeast end of Coloma. 238 Comment
  UCR158385  Oenothera elata subsp. hookeri George K. Helmkamp, E. A. Helmkamp 2004-6-20 8663 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR101675  Oligomeris linifolia George K. Helmkamp, E. A. Helmkamp 1998-2-26 2799 San Bernardino Eastern Mojave Desert, Saltbush scrub flat east of Soda Lake and 5.9 mi SSE of Baker on a farm road leading to Little Cowhole Mtn. 299 Comment
  UCR104047  Oligomeris linifolia George K. Helmkamp 1998-4-4 3108 San Bernardino Mojave Desert, S edge of Cadiz Dry Lake, 13.1 mi. north of mile-marker 76 on Calif. hwy 62 (Twentynine Palms Hwy), east of Twentynine Palms 183 Comment
  UCR173258  Orobanche uniflora George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10446 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along an unnamed road to Lake Clementine, 1.2 mi. N of Forest Hill Road 422 Comment
  UCR114384  Orthilia secunda George K. Helmkamp, E. A. Helmkamp 1997-9-8 2257 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  CLARK-A1045-915  Oryzopsis miliacea George K. Helmkamp 1977-8-11 Ventura Port Hueneme 246 East A Street; in empty lot beside this address; Oxnard 7.5'Q Comment
  UCR170338  Osmorhiza chilensis George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9878 El Dorado Northern Sierra Nevada Foothills, Silver Fork, 2.1 mi west of Kyburz along US Highway 50 1220 Comment
  UCR174407  Osmorhiza chilensis George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10568 El Dorado Northern Sierra Nevada foothills, along Hwy US-50, 7.2 miles east of Ice House Canyon Road 1162 Comment
  UCR197290  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2008-5-29 13514 Calaveras Sierra Nevada Mountains, Arnold Way Road parallel to CA-4 (Ebbetts Pass Hwy), 0.8 mile northeast of Arnold 1265 Comment
  SD212456  Osmorhiza occidentalis G. K. Helmkamp, E. A. Helmkamp 2006-8-3 11115 Alpine Northern Sierra Nevada Mountains; Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake. 2509 Comment
  SEINET3823368 Image available Oxalis laxa George K. Helmkamp, E. A. Helmkamp 2011-5-19 17311 Calaveras Sierra Nevada Foothills, Paloma Road, 3.1 miles southwest of its junction with CA-26, 4 miles NE (34 deg.) of Valley Springs (Valley Springs 7.5' Q) 352 Comment
  UCR197520  Oxalis laxa George K. Helmkamp, E. A. Helmkamp 2008-4-11 13250 Calaveras Sierra Nevada Mountains Foothills, along Fricot City Road, 1.8 miles northwest of CA-49, c. 4.6 miles (air) SE of San Andreas 387 Comment
  UCR104837  Oxalis oregana George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2135 Mendocino North Coast Range, Anderson Valley, Calif. Hwy 128, NW of Boonville 91 Comment
  RSA714094  Oxalis pes-caprae George K. Helmkamp 2003-12-18 8230 San Luis Obispo Arroyo Grande, Courtland Ave. one block S of Grand Ave. Brooklyn Creek, opposite San Francisco. 15 Comment
  UCR122589  Oxalis pes-caprae George K. Helmkamp 1995-11-23 116 San Luis Obispo Central Coast, Junction of Martingale Avenue and Buckskin Drive in Los Osos 46 Comment
  CAS-BOT-BC413284  Oxytheca dendroidea subsp. dendroidea G. K. Helmkamp 1996-10-17 1256 Mono 0.2 mi south of Benton Hot Springs beside highway CA-120 1828 Comment
  UCR95904  Oxytheca dendroidea subsp. dendroidea George K. Helmkamp 1996-10-17 1256 Mono Owens Valley, 0.2 mi. south of Benton Hot Springs, beside Calif. Hwy 120 1745 Comment
  UCD88146  Panicum acuminatum var. acuminatum G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12792 El Dorado Northern Sierra Nevada Mountains: Ice House Road at the junction to the lower campground and boat ramp of Loon Lake. 1000 Comment
  UCR67456  Panicum capillare George K. Helmkamp 1990-9-23 I- 24 Modoc Warner Mtns, Goose Lake, within 0.1 mi of the Oregon border 1476 Comment
  UCR119242  Panicum urvilleanum George K. Helmkamp, E. A. Helmkamp 1998-4-19 3369 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  UCR197243  Parvisedum congdonii George K. Helmkamp, E. A. Helmkamp 2008-4-25 13328 El Dorado Sierra Nevada Mountains Foothills, along Bear Creek Road 0.4 mile southeast of its junction with Meadow Brook Road, SE of Georgetown 747 Comment
  SEINET9262006  Paspalum dilatatum George K. Helmkamp, Amy Barnes 2013-1 22308 Calaveras Sierra Nevada Mountains Foothills: Utica Powerhouse Road (beside Angel's Creek) 0.6 mile northeast of its junction with CA-4 (Murphys 7.5 Q 974 Comment
  UCR232673  Paspalum dilatatum George K. Helmkamp, E. A. Helmkamp 2011-10-15 18437 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR253537  Paspalum dilatatum George K. Helmkamp, Amy Barnes 2013-9-23 22308 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road (beside Angel's Creek), 0.6 mile northeast of its junction with CA-4 974 Comment
  UCR259854  Paspalum dilatatum George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22436 Amador Sierra Nevada Mountains Foothills, Plymouth, at the junction of Mineral Street and Mill Street, near Hwy CA-49 329 Comment
  UCR122968  Pectocarya heterocarpa George K. Helmkamp, E. A. Helmkamp 2001-3-30 6432 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 Comment
  RSA519018  Pectocarya linearis subsp. ferocula George K. Helmkamp 1986-4-7 770 Riverside South of Morongo Valley: First canyon east of and parallel to Hwy 62 north of Indian Ave. B.M. land. 579 Comment
  CLARK-A1045-83  Pectocarya penicillata George K. Helmkamp 1978-4-27 Riverside San Jacinto Mountains .5 mile [north northwest] from CA Highway 74; Hemet 15'Q Comment
  CLARK-A1045-139  Pectocarya platycarpa George K. Helmkamp 1978-4-1 Riverside Deep Canyon rocky flat by University of California Reserve System Boyd research station; Palm Desert 15'Q Comment
  UCR51311  Pectocarya setosa George K. Helmkamp 1988-4-29 s.n. San Bernardino Eastern Mojave Desert, Fenner Valley between Hackberry Mtns & Vontrigger Hills, 11.3 mi NNW of Goffs 1100 Comment
  UC2015601  Pedicularis attollens G. Helmkamp 1995-9-23 3 -32 Alpine West side of Sonora Pass just beyond the Mono County line Comment
  UCR132141  Pelargonium grossularioides George K. Helmkamp, E. A. Helmkamp 2001-4-29 6578 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  UCR140458  Pellaea andromedifolia George K. Helmkamp 2004-4-21 8465 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR171345  Penstemon George K. Helmkamp, E. A. Helmkamp 2005-10-1 9986 Placer Northern Sierra Nevada Mtns., NW of Lake Tahoe; Junction of Bear Creek Dr. and Big John Road (c. 2.2 miles west of Calif. Highway 89 and just south of Alpine Meadows Road) 2015 Comment
  UCR194914  Penstemon azureus subsp. angustissimus George K. Helmkamp, E. A. Helmkamp 2007-5-18 12041 El Dorado Northern Sierra Nevada Mountains Foothills, along CA-49 about 7 miles northwest of Placerville 488 Comment
  SD241190  Penstemon azureus var. angustissimus George K. Helmkamp, E. A. Helmkamp 2011-7-9 17683 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 1.6 miles southeast of its junction with Foresthill Road (Foresthill 7.5'Q) 883 Comment
  UCR257734  Penstemon azureus var. azureus George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19516 Placer Northern Sierra Nevada Mountains, Sugar Bowl Road, 0.4 mile south of its junction with Donner Pass Road, just west of Lake Mary 2136 Comment
  UCR103995  Penstemon centranthifolius George K. Helmkamp 1998-4-3 3073 Riverside Sonoran (Colorado) Desert/San Jacinto Mtns., Snow Creek area north of Mt. San Jacinto; at edge of stream south of Snow Creek Rd at a point 1.4 mi. south of Calif. Hwy 111 396 Comment
  UCR107340  Penstemon centranthifolius George K. Helmkamp, E. A. Helmkamp 1998-5-14 3635 Fresno Coast Range, Warthan Creek Canyon, along Calif. Hwy 198, 27.6 mi. west of Interstate 5, west of Coalinga 457 Comment
  CLARK-A1045-951  Penstemon grinnellii subsp. scrophularioides George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5'Q Comment
  CLARK-A1045-1001  Penstemon incertus George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5'Q Comment
  SD241192  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17913 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road at the junction with North-South Road, 0.67 miles NW (300a^z) of junction with Hwy-88; 8.9 miles southeast of Omo Ranch Caldor 7.5'Q) 1456 Comment
  UCR171230  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2005-7-11 9708 El Dorado Northern Sierra Nevada Foothills, Pollock Pines area just south of US Highway 50 along County Road #5 1159 Comment
  UCR229580  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17913 El Dorado Northern Sierra Nevada Mountains, Omo Ranch Road at the junction with North-South Road, 0.67 mi. NW (300 deg. ) of jct. with Hwy 88; 8.9 miles southeast of Omo Ranch 1457 Comment
  CAS-BOT-BC245665  Penstemon newberryi var. newberryi G. K. Helmkamp 2007-6-29 12414 Amador Shot Rock Vista picnic area along CA-88, 0.9 miles east of its junction with Mormon Emigrant Trail, Bear River 7.5' Q., Northern Sierra Nevada Mountains 2328 Comment
  UCR217860  Penstemon newberryi var. newberryi George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16463 El Dorado Sierra Nevada Mountains, Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  UCR206115  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2009-6-3 14898 El Dorado Northern Sierra Nevada Mountains, Forbay Road, 4.7 miles northwest of its junction with Pony Express Trail in Pollock Pines 945 Comment
  UCR121727  Penstemon rostriflorus George K. Helmkamp, E. A. Helmkamp 2000-7-19 5936 Mono Sierra Nevada Mountains, McGee Creek Rd about 4 mi SW of US-395 2470 Comment
  UCR129549  Penstemon rostriflorus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6827 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  RSA0039240  Penstemon rydbergii var. oreocharis George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-10 21020 Amador Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 Comment
  UCR250341  Pentagramma pallida George K. Helmkamp, Mary Alice Barnes 2013-4-18 20368 Placer Northern Sierra Nevada Mtns Foothills, Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar 512 Comment
  UCR234576  Pentagramma triangularis subsp. triangularis George K. Helmkamp, E. A. Helmkamp 2011-6-2 17452 Nevada Northern Sierra Nevada Mountains Foothills, 2.25 miles SW (226 deg. ) of French Corral, along Pleasant Valley Road, 1.1 miles south of its crossing of the South Fork Yuba River 255 Comment
  UCD127881  Perideridia lemmonii G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11002 El Dorado Northern Sierra Nevada Mountains: Echo Summit along Hwy US-50; at entrance to the road maintenance station. 2245 Comment
  UCR177864  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2006-8-7 11205 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring; Tragedy Spring Road, 0.3 mile north of Calif. Hwy 88 2424 Comment
  UCR233323  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2011-9-1 18225 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR235134  Perideridia lemmonii George K. Helmkamp, William Barnes 2010-9-4 16935 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR87845  Perideridia parishii George K. Helmkamp, E. Helmkamp 1995-6-23 95- 6 -3 Alpine Sierra Nevada Mtns, Calif. Hwy 89, 6.0 mi east of the junction with Calif. Hwy 4 on the way to Monitor Pass. Slope above Monitor Creek 2200 Comment
  SD236164  Perideridia parishii subsp. latifolia G. K. Helmkamp, E. A. Helmkamp 2008-7-16 13819 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR114382  Perideridia parishii subsp. latifolia George K. Helmkamp, E. A. Helmkamp 1997-9-8 2253 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR176472  Perideridia parishii subsp. latifolia George K. Helmkamp, E. A. Helmkamp 2006-8-7 11185 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  SD224864  Perityle emoryi G. K. Helmkamp 1998-2-5 2648 Riverside Palm Springs, 1.1 mi. W of CA Hwy 111 on Tramway Rd. 334 Comment
  UCR30076  Perityle emoryi George K. Helmkamp 1983-4-5 483- 7 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  SD236379  Persicaria hydropiper G. K. Helmkamp, E. A. Helmkamp 2006-10-10 11528 Yuba Northern Sierra Nevada Mountains Foothills: along Hwy Ca-49 just north of Nevaday county line at the Middle Yuba River Bridge. 451 Comment
  UCD99571  Persicaria maculosa G. K. Helmkamp; E. A. Helmkamp 2007-8-29 12835 Yuba Northern Sierra Nevada Mountains: along Hwy. CA-49, 0.5 mile south of Camptonville. 817 Comment
  SEINET3245950  Petrorhagia dubia G. K. Helmkamp, E. A. Helmkamp 2010-1 15934 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5') 157 Comment
  UCR217875  Petrorhagia dubia George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16130 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 2.9 miles east of its junction with Perry Creek road 1012 Comment
  UCR231321  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2011-5-6 17207 Yuba East edge of Sacramento Valley, junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 deg. ) of Wheatland 56 Comment
  UCR250351  Petrorhagia dubia George K. Helmkamp, Mary Alice Barnes 2013-4-18 20357 Placer Northern Sierra Nevada Mtns Foothills, Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar 512 Comment
  UCR134403  Phacelia californica George K. Helmkamp, E. A. Helmkamp 2001-4-29 6597 San Luis Obispo Irish Hills, Prefumo Cyn Rd., 2.8 miles west of Los Osos Valley Rd., SW of San Luis Obispo 91 Comment
  CLARK-A1045-183  Phacelia cicutaria subsp. hispida George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5'Q Comment
  SD148140  Phacelia cicutaria var. cicutaria G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6513 Kern Tehachapi Mountains; Hart Flat turnoff from CA-58. 883 Comment
  UCR207652  Phacelia cicutaria var. cicutaria George K. Helmkamp, E. A. Helmkamp 2009-4-21 14522 El Dorado Sierra Nevada Mountains Foothills, junction of Rock Creek Road and CA-193, north of Chili Bar and the South Fork of the American River 390 Comment
  SEINET269106 Image available Phacelia cicutaria var. hubbyi G. Helmkamp 1994-5-18 91 -9 San Luis Obispo Alamo Cyn 7 mi E of US-101 on CA-166 then 4 mi N (generally NE of Twitchell reservoir). 213 Comment
  UCR104821  Phacelia crenulata var. ambigua George K. Helmkamp, E. A. Helmkamp 1998-2-5 2663 Riverside Sonoran (Colorado) Desert, Indio Hills, 3 mi. east of Thousand Palms & 1.1 mi. N on Amity Rd. 101 Comment
  UCR104872  Phacelia crenulata var. ambigua George K. Helmkamp 1998-3-30 3038 San Bernardino Mojave Desert, vicinity of Twentynine Palms; Encelia Ave., 1.0 mi. north of Calif. Hwy 62 793 Comment
  SD167101  Phacelia distans G. K. Helmkamp, E. A. Helmkamp 2005-4-16 9339 Santa Barbara Outer South Coast Range; Sierra Madre Mountains, 1.1 miles south of Highway CA 166 on Miranda Pines Road. 526 Comment
  SEINET1109556  Phacelia distans G. K. Helmkamp, E. A. Helmkamp 2005-1 9339 Santa Barbara Outer South Coast Range: Sierra Madre Mountains, 1.1 mi S of Hwy CA-166 on Miranda Pines Road. 526 Comment
  UCD120404  Phacelia distans G. K. Helmkamp; E. A. Helmkamp 2001-3-30 6392 San Bernardino Mojave Desert: CA-62, 16.2 mi E of Utah Trail (29 Palms) near Dale Lake. Comment
  UCR121773  Phacelia douglasii George K. Helmkamp 2002-4-20 7463 San Luis Obispo Central Coast, Los Osos, 0.2 mile northwest of Monarch Lane 9 Comment
  CLARK-A1045-250  Phacelia fremontii George K. Helmkamp 1978-3-14 San Bernardino Mojave Desert north of Victorville; creosote bush scrub; Hodge 7.5'Q Comment
  RSA519133  Phacelia frigida subsp. frigida George K. Helmkamp 1990-8-2 s.n. Mono Between Mammoth and Lake Mary. 2591 Comment
  UCR233268  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2011-8-6 17998 Amador Northern Sierra Nevada Mountains, Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  UCR251254  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2012-7-6 19329 El Dorado Northern Sierra Nevada Mountains, Ice House Road at Ice House village, 10.5 miles north of its junction with US-50 1677 Comment
  UCR15550  Phacelia humilis George K. Helmkamp 1978-5-30 s.n. Mono Along the E Walker River 5 mi south of Nevada 1930 Comment
  UCD120547  Phacelia hydrophylloides G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11150 Alpine Northern Sierra Nevada Mountains: Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake. 2509 Comment
  UCR175658  Phacelia hydrophylloides George K. Helmkamp, E. A. Helmkamp 2006-7-7 10811 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 3.2 miles north of Hwy US-50, northeast of Kyburz 1982 Comment
  UCR257753  Phacelia hydrophylloides George K. Helmkamp, Amy Barnes 2012-8-12 19592 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  SD146239  Phacelia marcescens G. K. Helmkamp 1999-6-30 5103 Nevada Northern Sierra Nevada Range: Truckee, 1-2 miles east of Donner Lake. 1540 Comment
  CAS-BOT-BC167231  Phacelia mutabilis G. K. Helmkamp; E. A. Helmkamp 2009-6-29 15060 El Dorado Sierra Nevada Mountains Foothills: Ice House Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83 deg. ) of Pollock Pines 989 Comment
  UCD120631  Phacelia mutabilis G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10570 El Dorado Northern Sierra Nevada: along Hwy US-50, 7.2 miles east of Ice House Canyon Road. 1162 Comment
  UCR197550  Phacelia mutabilis George K. Helmkamp, E. A. Helmkamp 2008-6-23 13706 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 0.7 mile southeast of Leek Spring 2268 Comment
  UCR206998  Phacelia mutabilis George K. Helmkamp, Amy Barnes 2009-7-8 15154 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, about 1.3 miles north of Ice House 1654 Comment
  UCR99897  Phacelia ramosissima var. subglabra George K. Helmkamp 1997-9-30 2505 Inyo Sierra Nevada Mtns., Big Pine Creek 2287 Comment
  RSA667124  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2001-4-27 6558 Kern Temblor Range: CA-58, 1.1 mi SW of the San Luis Obispo Co. line. 793 Comment
  SEINET10593163  Phalaris minor George K. Helmkamp 1996-3-11 Helmkamp 1000 Unknown Edge of cultivated field at 35th Ave and CA-78, 1.7 mi north of Palo Verde. Common weed where watering occured. 91 Comment
  UCR233054  Phalaris paradoxa George K. Helmkamp, E. A. Helmkamp 2011-5-12 17266 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR174933  Philadelphus lewisii George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10777 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 12.3 miles east of the Mokelumne Hill turnoff from Calif. Hwy 49 640 Comment
  UCR102587  Phleum alpinum George K. Helmkamp, E. A. Helmkamp 1997-9-11 2394 Alpine Sierra Nevada Mountains, 0.2 mi northwest of Sonora Pass along CA Hwy 108 2912 Comment
  UCR188480  Phleum alpinum George K. Helmkamp, E. A. Helmkamp 2007-7-17 12524 Amador Northern Sierra Nevada Mountains, along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake 2317 Comment
  UCR170813  Phleum pratense George K. Helmkamp, E. A. Helmkamp 2005-9-30 9944 Placer Northern Sierra Nevada Mtns., Junction of Chalet and Alpine Meadows Roads west of Calif. Highway 89 (near Alpine ski area) 2081 Comment
  UCR241720  Phleum pratense George K. Helmkamp, E. A. Helmkamp 2012-9-25 19924 Placer Northern Sierra Nevada Mountains, Laing Road, parallel to I-80; 0.2 mile east of its junction with Emigrant Gap Road 1611 Comment
  UCD118300  Phlox condensata G. K. Helmkamp 2007-7-7 12493 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 0.2 mile south of its junction with CA-88. 2200 Comment
  UCR121451  Phlox diffusa George K. Helmkamp, E. A. Helmkamp 1999-6-30 5076 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  CLARK-A1045-1100  Phlox dispersa George K. Helmkamp 1977-7-3 Mono Sierra Nevada ; Tioga Pass 7.5'Q 3291 Comment
  RSA772289  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2010-4-17 15902 Placer along CA-49, 2.5 miles southeast of Pilot Hill 271 Comment
  UCR87503  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 25.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR237350  Phlox speciosa subsp. occidentalis George K. Helmkamp, E. A. Helmkamp 2012-6-13 19161 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 2.6 miles north of its junction with CA-20 1088 Comment
  UCR13864  Phlox stansburyi var. brevifolia George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at Benton Crossing, just north of Crowley Lake 2134 Comment
  UCR13865  Phlox stansburyi var. brevifolia George K. Helmkamp 1973-6-13 s.n. Inyo Owens Valley, Owens River near Pleasant Valley 1372 Comment
  UCR61760  Pholistoma auritum George K. Helmkamp 1990-4-1 s.n. San Luis Obispo West Cuesta Ridge, c. 3 mi west of US Hwy 101 671 Comment
  UCR161464  Pholistoma auritum var. auritum George K. Helmkamp, E. A. Helmkamp 2005-3-5 9025 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness N of Lopez Lake, Upper Lopez Canyon Road, 5.5 mi N of jct with Lopez Road 335 Comment
  RSA628439  Pholistoma membranaceum George K. Helmkamp, E. A. Helmkamp 1999-2-26 4634 San Diego Chula Vista: Border State Park near the Pacific Ocean and Mexico. 6 Comment
  UCD120927  Pholistoma membranaceum G. K. Helmkamp; E. A. Helmkamp 2001-4-27 6553 Kern Kern County; Temblor Range, CA-58, 1.1 mi SW of the San Luis Obispo Co. line. 792 Comment
  UCR130084  Pholistoma membranaceum George K. Helmkamp, E. A. Helmkamp 2000-4-24 5560 Monterey Inner South Coast Ranges, Salinas Valley, 6 miles south of King City and 0.6 mile east of G-14 (Jolon Rd) on San Lucas Rd. 183 Comment
  UCR41586  Pholistoma membranaceum George K. Helmkamp 1986-3-8 726 San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, S of Morongo Valley. Big Morongo Preserve, 1.5 mi. downstream from Kiosk. 671 Comment
  UCR136214  Phoradendron villosum George K. Helmkamp, E. A. Helmkamp 1999-9-30 5309 San Bernardino East side San Bernardino Mountains., 7.3 mi up Burns cyn Rd from Rimrock Rd (NW of Pioneertown) 1799 Comment
  UCR170461  Phoradendron villosum George K. Helmkamp, Elizabeth Helmkamp 2005-10-29 10013 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento; c. 5 air mi NNE of Placerville], 5.1 [road] mi east of Calif. Highway 193 along Rock Creek Road 451 Comment
  UCR233332  Phoradendron villosum George K. Helmkamp, E. A. Helmkamp 2011-3-29 17112 Calaveras Eastern San Joaquin Valley, Oak Grove, along CA-26, at the junction with Josephine Lane, c. 0.5 mile southwest of Jenny Lind Road 117 Comment
  UCR89109  Phoradendron villosum George K. Helmkamp 1995-10-28 1- 01 San Bernardino San Bernardino Mtns, 3.5 mi. NW of Rimrock, Burns Cyn. Rd. 1673 Comment
  UCR201569  Physalis lancifolia George K. Helmkamp, E. A. Helmkamp 2008-10-14 14270 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  UCR231865  Physocarpus capitatus George K. Helmkamp, E. A. Helmkamp 2010-10-16 17030 Placer Northern Sierra Nevada Mountains Foothills, along Forest Route 24 at Parker Flat and beside Forbes Creek, 1.9 miles east (airline) of the Sugar Pine Reservoir dam 1180 Comment
  UCR59826  Picris echioides George K. Helmkamp 1989-8-6 s.n. San Luis Obispo Central Coast, Baywood Park, at the south edge of Morro Bay 3 Comment
  UCR261992  Pinus contorta subsp. murrayana George K. Helmkamp, Amy Barnes 2014-10-10 23150 Amador Northern Sierra Nevada Mountains, Plasse Road at the south end of Silver Lake and 0.1 mile north of Plasse's Resort 2215 Comment
  UCR206703  Pinus ponderosa George K. Helmkamp, E. A. Helmkamp 2009-3-19 14435 El Dorado Sierra Nevada Mtns. Foothills, Meadow Brook Road, 1.3 miles east of CA-193 and at the junction with Bear Creek Rd 680 Comment
  UCD135020  Pinus sabiniana G. K. Helmkamp; E. A. Helmkamp 2007-9-17 12975 Yolo West edge of Sacramento Valley: Capay Valley, Brick Chimney Canyon; along County Road-78A, 2.4 miles southwest of its junction with CA-16 and about 3 miles west of Capay. 113 Comment
  UCR232228  Plagiobothrys fulvus George K. Helmkamp, E. A. Helmkamp 2011-5-6 17212 Yuba Eastern edge of Sacramento Valley, Camp Far West Road, 1.3 miles southeast of its junction with Spenceville Road, 5.25 mi. NE (52 deg. ) of Wheatland 62 Comment
  SEINET13203115 Image available Plagiobothrys fulvus var. campestris George K. Helmkamp 2014-1 22742 Nevada Northern Sierra Nevada Mountains Foothills: along CA-120, 2.3 miles west of its junction with CA-49 in Grass Valley (Grass Valley 7.5' Q.) 728 Comment
  UCR253548  Plagiobothrys greenei George K. Helmkamp, Amy Barnes 2014-4-7 22693 Sacramento Sacramento Valley, along CA-104/Twin Cities Rd., 0.7 mile west of the Amador County line 63 Comment
  UCR88316  Plagiobothrys hispidus George K. Helmkamp 1995-9-23 3- 01 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  UCR232272  Plagiobothrys humistratus George K. Helmkamp, E. A. Helmkamp 2011-3-29 17103 San Joaquin San Joaquin Valley, along CA-26 at the junction with Ospital/N Wimer Road, c. 0.3 mile southwest of the Calaveras County line, 9.1 miles NE (56 deg. ) of Linden 72 Comment
  SD236239  Plagiobothrys nothofulvus G. K. Helmkamp, E. A. Helmkamp 2008-3-18 13191 Calaveras Sierra Nevada Mountains Foothills: Jesus Maria Road, 3.2 miles southeast of its juncction with CA-26; beside Jesus Maria Creek (Mokelumne Hill 7.5'Q) 319 Comment
  UCR130226  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2001-4-27 6529 Kern Tehachapi Mtns., Western Foothills, Calif. Hwy 223 (Bear Mtn. Blvd.), 7.2 mi east of Arvin 366 Comment
  UCR173638  Plagiobothrys nothofulvus George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10160 Amador Northern Sierra Nevada Foothills, E of Sacramento, SW of Shenandoah Valley; along Calif. Hwy 49, c. 4.5 mi north of Plymouth 341 Comment
  UCR250676  Plagiobothrys nothofulvus George K. Helmkamp, Mary Alice Barnes 2013-4-24 20410 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 1.9 miles east of its junction with CA-26 in West Point 652 Comment
  UCR253528  Plagiobothrys shastensis George K. Helmkamp, Amy Barnes 2014-4-23 22792 Placer Sierra Nevada Mountains Foothills, Old Auburn-Foresthill Road, 1.7 miles northeast of its junction with CA-49 at North Fork American River 407 Comment
  SEINET13203148 Image available Plagiobothrys stipitatus var. micranthus George K. Helmkamp, Amy Barnes 2013-1 20250 Yuba Eastern Sacramento Valley: northbound exit road from CA-65, connecting with Forty Mile Road (Olivehurst 7.5' Q.) 30 Comment
  UCR258235  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, Amy Barnes 2013-3-28 20250 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  UCR158389  Plantago coronopus George K. Helmkamp, E. A. Helmkamp 2004-6-20 8658 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR159243  Plantago coronopus George K. Helmkamp, E. A. Helmkamp 2004-6-24 8730 Santa Barbara Central Coast, between Ocean Park [Rd.] and Pacific Ocean at Surf; NW of Lompoc 15 Comment
  SD248467  Plantago erecta George K. Helmkamp 2013-3-14 20186 Calaveras San Joaquin Valley/Sierra Nevada Foothills: Jenny Lind Road (County Road J14) 0.1 mile north of its junction with Kirby Road, 24 miles NE of Stockton (Valley Springs 7.5'Q) 91 Comment
  UCR140412  Plantago erecta George K. Helmkamp 2004-2-19 8306 San Luis Obispo Central Coast, NW of Nipomo, Pomeroy Rd, 0.2 mi N of Willow Rd. 91 Comment
  UCR163789  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2005-3-31 9294 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. National Forest Boundary along Figueroa Mountain Road NE of Los Olivos 701 Comment
  UCR173673  Plantago erecta George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10175 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, between N and Middle Forks of the Cosumnes River; Sand Ridge Road, 3.1 mi. east of Calif. Hwy 49 534 Comment
  UCR237083  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2012-4-24 18832 El Dorado Northern Sierra Nevada Mountains Foothills, Bear Creek Road, 0.4 mile south of its junction with Meadow Brook Road, 2.5 miles NE (66 deg. ) of Garden Valley 705 Comment
  CLARK-A1045-277  Plantago insularis George K. Helmkamp 1978-3-24 San Bernardino Cady Mountains Cave Mt. 15'Q Comment
  CAS-BOT-BC516752  Plantago lanceolata George K. Helmkamp; Amy Barnes 2013-3-28 20295 Placer Eastern Sacramento Valley: NW side of jct of Riosa Rd and Andressen Rd, NE of Sheridan 36 Comment
  CDA36229  Plantago lanceolata G. K. Helmkamp, E. A. Helmkamp 2009-9-22 15638 Amador Sierra Nevada Mountains Foothills; Junction of Shenandoah Road (CA Hwy 16) and Steiner Road, southwest of River Pines. Comment
  UCD124589  Plantago lanceolata G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13025 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCR233004  Plantago major George K. Helmkamp, E. A. Helmkamp 2011-9-24 18332 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road at the junction with South Creek Road, 4.0 miles north of the Wentworth Springs/Loon Lake junction 1750 Comment
  UCR103667  Plantago ovata George K. Helmkamp, E. Helmkamp 1998-1-24 2572 Imperial Sonoran (Colorado) Desert, between Hwy I-8 & the All-American Canal across from the Brock Research Center (c. 3 mi. east of the jct of Calif. Hwy 98 with Hwy I-8) 46 Comment
  UCR122606  Plantago ovata George K. Helmkamp, E. A. Helmkamp 2001-3-17 6280 Imperial Sonoran (Colorado) Desert, Ogilby Rd., 15.4 miles south of Calif. Hwy 78 168 Comment
  UCR196777  Platanthera leucostachys George K. Helmkamp, E. A. Helmkamp 2008-7-22 13894 Alpine Eastern Sierra Nevada Mountains, Carson River road, 0.4 mile east of its west junction with CA-88 1713 Comment
  RSA749531  Platanus X acerifolia George K. Helmkamp, E. A. Helmkamp 2008-10-6 14220 Sutter Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
Read comments
May 5 2014
  UCR121603  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2002-4-22 7602 San Benito San Andreas rift zone, Rabbit Valley, along Calif. Hwy 25; 23.7 mi north of Calif. Hwy 198 549 Comment
  UCR197413  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2008-3-18 13198 Calaveras Sierra Nevada Mountains Foothills, along CA-49 at the crossing of the North Fork of the Calaveras river; 8.3 miles south of Mokelumne Hill 235 Comment
  UCR256502  Plectritis brachystemon George K. Helmkamp, Amy Barnes 2014-5-8 22857 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 0.2 mile east of old CA-49 in town of Sutter Creek 375 Comment
  SD241205  Plectritis ciliosa George K. Helmkamp, E. A. Helmkamp 2012-4-21 18820 Nevada Northern Sierra Nevada Mountains Foothills: McCourtney Road, 0.4 mile east of its junction with Perimeter Road, 14.5 miles NW (338a^z) Of Auburn (Wolf 7.5'Q) 406 Comment
  UCD137539  Plectritis congesta subsp. brachystemon G. K. Helmkamp; E. A. Helmkamp 2000-4-20 5385 San Luis Obispo San Luis Obispo County: Central Coast Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
  RSA747032  Plectritis macrocera George K. Helmkamp, E. A. Helmkamp 2007-5-7 11966 El Dorado Pedro Hills Road, 0.5 mile west of its junction with Calif. Hwy 49, junction of roads 5.3 miles south of Cool 311 Comment
  UCR238450  Poa annua George K. Helmkamp, E. A. Helmkamp 2012-4-4 18686 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR249137  Poa annua George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20755 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  UCR122393  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2002-4-23 7504 Madera Western Sierra Nevada foothills, Bass Lake Road, 1 mile southeast of the junction with CA Hwy 41, north of Oakhurst 915 Comment
  UCR238607  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2012-3-22 18641 Amador Northern Sierra Nevada Mountains Foothills, Bell Road, 0.2 mile east of its junction with CA-49 270 Comment
  UCR190567  Poa cusickii George K. Helmkamp 2007-6-29 12438 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  UCR237719  Poa leptocoma subsp. leptocoma George K. Helmkamp, E. A. Helmkamp 2012-7-14 19388 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  UCR237143  Poa pratensis subsp. pratensis George K. Helmkamp, E. A. Helmkamp 2012-7-14 19415 Amador Northern Sierra Nevada Mountains, Tragedy Spring, near Carson Pass Hwy, along Tragedy Spring Road 0.3 mile east of its junction with CA-88 2421 Comment
  RSA424885A  Poa secunda George K. Helmkamp 1987-6-17 s.n. Mono Campground at canyon, W base of Glass mountain. 5 mi. E of Owens River. 2256 Comment
  SEINET3821902 Image available Poa secunda George K. Helmkamp, E. A. Helmkamp 2012-5-18 19002 El Dorado Northern Sierra Nevada Mountains, junction of Bonnetti Road (Capps Crossing Rd.) and Mormon Emigrant Trail, east of Jenkinson Lake (Sly Park 7.5' Q) 1260 Comment
  UCR121713  Poa secunda George K. Helmkamp, E. A. Helmkamp 2001-4-26 6491 Kern Eastern Tehachapi Mtns Foothills, Tehachapi Willow Springs Rd., 2.2 mi south of Highline Rd. 1372 Comment
  UCR163785  Poa secunda George K. Helmkamp, E. A. Helmkamp 2005-3-31 9290 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. Figueroa Mountain lookout area NE of Los Olivos. 1372 Comment
  UCR237030  Poa secunda George K. Helmkamp, E. A. Helmkamp 2012-5-18 19017 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 0.1 mile east of Pebble Canyon Road, SE of Pollock Pines, S of US Hwy 50 1495 Comment
  UCD92367  Poa secunda subsp. juncifolia G. K. Helmkamp; E. A. Helmkamp 2007-6-6 12260 Amador Northern Sierra Nevada Mountains. Along Mormon Emigrant Trail, 8.3 miles E of its junction with Sly Park Road. 1616 Comment
  UCR172667  Poa secunda subsp. juncifolia George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10181 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest, Along Calif. Hwy 193, just N of Kelsey, south of Gopher Hill 610 Comment
  SEINET244319 Image available Poa secunda var. secunda G. K. Helmkamp, E. A. Helmkamp 2002-4-15 7360 Santa Barbara Sierra Madre Mountains; Miranda Pind Rd., 1.0 mi SE of CA-166 549 Comment
  UCR176481  Polemonium californicum George K. Helmkamp, E. A. Helmkamp 2006-8-3 11145 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  SEINET4691427  Polygala cornuta George K. Helmkamp, E. A. Helmkamp 2012-1 19216 Placer Northern Sierra Nevada Mountains Foothills: Foresthill Road, 2.6 miles east of its junction with Mosquito Ridge Road in Forest Hill. 1052 Comment
  CDA7123  Polygonum arenastrum G. K. Helmkamp, E. A. Helmkamp 2006-10-1 11511 Nevada Northern Sierra Nevada Mountains Foothills; Along Highway CA-49, 10.4 miles north of the crossing of the South Yuba River. Comment
  SD247488  Polygonum aviculare George K. Helmkamp, Elizabeth Helmkamp 2012-9-7 22281 Amador Northern Sierra Nevada Mountains: on the south side of CA-88/Carson Pass Hwy, c. 0.3 mile west of the junction with Bear River Reservoir Road (Peddler Hill 7.5'Q) 1933 Comment
  SEINET3856758 Image available Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-10-20 17036 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile N of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE of Trowbridge 17 Comment
  SEINET998808  Polygonum aviculare G. K. Helmkamp, E. A. Helmkamp 2006-1 11565 Amador Central Valley/Northern Sierra Nevada Foothills: Along CA-16 0.2 miles east of Waits Station, southwest od Plymouth (Irish Hill 7.5' Q) 305 Comment
  UCR161249  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2005-1-1 8876 Santa Barbara Central Coast, N side Casmalia Hills, Corallitos Canyon along Brown Road, 3.5 mi west of Calif. highway 1. 146 Comment
  UCR171407  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2005-7-11 9679 El Dorado Northern Sierra Nevada Foothills, Cameron Park (E of Sacramento, along US Highway 50); corner of Santos Street and Santos Court Road 370 Comment
  UCR190635  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2007-9-19 12988 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Lost Creek Road and French Creek Road just north of Frenchtown 366 Comment
  UCR256642  Polygonum aviculare George K. Helmkamp, Elizabeth Helmkamp 2013-10-10 22394 Nevada Sierra Nevada Mountains Foothills, junction of Combie Road and Timber Ridge Dr. southeast of Higgins Corner near Lake of the Pines 456 Comment
  UCD100023  Polygonum aviculare subsp. depressum G. K. Helmkamp; E. A. Helmkamp 2006-10-23 11565 Amador Central Valley/Northern Sierra Nevada Mountains Foothills: along Hwy. CA-16, 0.2 mile east of Waits Station, southwest of Plymouth. 305 Comment
  UCD100034  Polygonum aviculare subsp. depressum G. K. Helmkamp; E. A. Helmkamp 2007-9-11 12933 El Dorado Northern Sierra Nevada Mountains Foothills: Along Hwy US-50, 0.4 mile southwest of Phillips. 1829 Comment
  UCD100043  Polygonum aviculare subsp. depressum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13037 Sutter Sacramento Valley: Sutter Buttes, 2.3 miles northwest of Sutter on Pass Road. 3 Comment
  RSA0049891  Polygonum bistortoides George K. Helmkamp, E. A. Helmkamp 2012-7-6 19356 El Dorado Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50. 2078 Comment
  UCR206587  Polygonum douglasii subsp. douglasii George K. Helmkamp, Ann Kerchner 2009-7-25 15288 Amador Sierra Nevada Mountains, south side of CA-88, 3.2 miles west of the Alpine Co. line; near Martin Meadow 2306 Comment
  UCR161967  Polygonum fagopyrum George K. Helmkamp, E. A. Helmkamp 2005-2-9 8894 Santa Barbara Outer South Coast Ranges, south edge of Sierra Madre Mtns north of Sisquoc; 1.6 mi north of Foxen Canyon Road along Tepusquet Road 171 Comment
  UCR241972  Polygonum hydropiperoides George K. Helmkamp, E. A. Helmkamp 2012-9-7 19775 Amador Northern Sierra Nevada Mountains Foothills, along CA-49 in Plymouth; 0.1 mile south of its junction with Fiddletown Rd./Plymouth-Shenandoah Rd. 303 Comment
  UCR219100  Polygonum lapathifolium George K. Helmkamp, E. A. Helmkamp 2009-9-5 15604 Butte Sacramento Valley, Honcut, on Palermo-Honcut Highway, 0.1 mile north of Lower Honcut Road 35 Comment
  SD241152  Polygonum minimum George K. Helmkamp, E. A. Helmkamp 2011-9-13 18261 El Dorado Northern Sierra Nevada Mountains: Foster Meadow Road, 0.6 miles north of its junction with CA-88 (Bear River Reservoir 7.5'Q) 2136 Comment
  UCR88212  Polygonum polygaloides subsp. kelloggii George K. Helmkamp 1995-9-23 3- 29 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  UCR231098  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2011-9-16 18271 Calaveras Northern Sierra Nevada Mountains Foothills, Bald Mountain Road, 1.5 miles SW of Hunter Creek crossing, 7.3 miles NE of the junction of Blue Mountain Rd and Rail Road Flat Rd 1037 Comment
  UCD136975  Polypodium calirhiza G. K. Helmkamp; E. A. Helmkamp 2006-3-26 10115 El Dorado Northern Sierra Nevada Foothills: ENE of Sacramento; Rock Creek Road at Jaybird Creek, 5.1 mi E of CA Highway 193 (generally ENE of Chili Bar). 590 Comment
  UCR193282  Polystichum imbricans George K. Helmkamp, E. A. Helmkamp 2007-5-30 12173 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 10.7 miles east of its junction with Forest Hill Road in Foresthill 588 Comment
  UCR197540  Populus fremontii subsp. fremontii George K. Helmkamp, E. A. Helmkamp 2008-3-22 13233 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, along Farris Road, 0.2 mile southeast of CA-26, 5.7 miles southwest of Valley Springs 142 Comment
  SD232587  Potamogeton natans George Helmkamp 1996-9-21 1194 B San Luis Obispo Santa Margarita Lake. 395 Comment
  UCR218268  Potentilla drummondii subsp. drummondii George K. Helmkamp, E. A. Helmkamp 2010-7-23 16595 El Dorado Northern Sierra Nevada Mountains, trailhead at the east end of Wright's Lake, 1.2 miles north of the visitor's center at the lake entrance 2127 Comment
  SEINET4178513 Image available Potentilla glandulosa George K. Helmkamp, E. A. Helmkamp 2010-8-3 16692 Calaveras Northern Sierra Nevada Mountains: along CA-4. 0.8 mile southwest of the junction with Forest Route 7N23/Black Creek Rd., NE of Dorrington. 1854 Comment
  UCR173450  Potentilla glandulosa George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10374 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  RSA779394  Potentilla glandulosa subsp. ashlandica George K. Helmkamp, E. A. Helmkamp 2009-6-29 15082 El Dorado Ice House Road, 8.2 miles north of its junction with CA-50, c. 10.5 air miles NE (73 deg.) of Pollock Pines 1646 Comment
  UCR197620  Potentilla glandulosa subsp. glandulosa George K. Helmkamp, E. A. Helmkamp 2008-5-29 13529 Calaveras Sierra Nevada Mountains, along the north side of CA-4 (Ebbetts Pass Rd.) at Avery 1024 Comment
  UCR218285  Potentilla glandulosa subsp. nevadensis George K. Helmkamp, E. A. Helmkamp 2010-7-9 16480 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  UCR88321  Potentilla glandulosa subsp. nevadensis George K. Helmkamp 1995-9-23 3- 26 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  RSA0049895  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2012-7-6 19360 El Dorado Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50. 2078 Comment
  UCR240936  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2012-6-26 19284 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek 1345 Comment
  UCR13877  Potentilla gracilis George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at and near Big Springs 2195 Comment
  UCD113908  Potentilla gracilis var. fastigiata G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11200 El Dorado Northern Sierra Nevada Mtns: Tragedy Spring; Tragedy Spring Road, 0.3 mile north of Hwy CA-88. 2424 Comment
  UCD113912  Potentilla gracilis var. fastigiata G. K. Helmkamp 2007-7-7 12472 El Dorado Northern Sierra Nevada Mtns: along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area. 2338 Comment
  UCD113914  Potentilla gracilis var. fastigiata G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12528 Amador Northern Sierra Nevada Mtns: along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake. 2317 Comment
  UCR229457  Potentilla gracilis var. fastigiata George K. Helmkamp, E. A. Helmkamp 2011-7-26 17895 Placer Northern Sierra Nevada Mountains, Bowman Lake Road, 0.9 mile north of its junction with CA Hwy 20, 0.85 mi. NE (23 deg. ) of Emigrant Gap and N of I-80 1434 Comment
  UCR231866  Prunella vulgaris var. lanceolata George K. Helmkamp, E. A. Helmkamp 2010-10-16 17029 Placer Northern Sierra Nevada Mountains Foothills, along Forest Route 24 at Parker Flat and beside Forbes Creek, 1.9 miles east (airline) of the Sugar Pine Reservoir dam 1180 Comment
  RSA748730  Prunus emarginata George K. Helmkamp, E. A. Helmkamp 2008-8-1 13931 El Dorado Wright's Lake Road, 3.8 miles north of its junction with CA-50. 2076 Comment
  SD243196  Prunus emarginata George K. Helmkamp, E. A. Helmkamp 2010-9-1 16902 El Dorado Northern Sierra Nevada Mountains: Mehrten Springs Road, 0.6 mile north of its junction with CA-88. Seep and roadside bank. 2018 Comment
  SEINET7356567  Prunus emarginata George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10545 El Dorado Northern Sierra Nevada Mountains: El Dorado National Forest; S of Union Valley Reservoir, ca. 2 (air mi. N of US Hwy 50); junction of Ice House Canyon Road and Granite Springs Road (Riverton 7.5' Q.: Near 381/447'56'N, 1201/423'49'W).; 0 1610 Comment
  CLARK-A1045-109  Prunus fremontii George K. Helmkamp 1977-3-20 Riverside Pinyon Pines area above west edge of Deep Canyon; Palm Desert 15'Q Comment
  UCR13826A  Psathyrotes annua George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  CAS-BOT-BC356344  Psathyrotes ramosissima G. Helmkamp; E. Helmkamp 1998-1-17 2534 Riverside Box Canyon northeast of Mecca and 3.5 miles south of Shaver's Well 243 Comment
  UCD135082  Pseudognaphalium luteoalbum G. K. Helmkamp; E. A. Helmkamp 2007-8-29 12833 Yuba Northern Sierra Nevada Mountains: along Hwy CA-49, 0.5 mile south of Camptonville. 817 Comment
  UCD135245  Pseudognaphalium thermale G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12724 El Dorado Northern Sierra Nevada Mountains: Wright's Lake; south side of the lake at the entrance to the campground. 2131 Comment
  UCR218286  Pseudostellaria jamesiana George K. Helmkamp, E. A. Helmkamp 2010-7-9 16479 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  UCR229413  Pseudostellaria jamesiana George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18092 Alpine Northern Sierra Nevada Mountains, unnamed dirt road on the east side of CA-4 and about 0.1 mile northeast of the Calaveras Co. line, near Bear Valley 2165 Comment
  SD240762  Pseudotsuga menziesii var. menziesii G. K. Helmkamp, E. A. Helmkamp 2008-4-28 13342 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail near Old Iron Mountain, 6 miles east of its junction with Sly Park Road (Old Iron Mountain 7.5'Q) 1451 Comment
  UCR184370  Pseudotsuga menziesii var. menziesii George K. Helmkamp, E. A. Helmkamp 2007-2-24 11590 El Dorado Foothills, Northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Pleasant Valley Road and Patterson Dr., east end of Diamond Springs 537 Comment
  CLARK-A1045-174  Psilocarphus brevissimus George K. Helmkamp 1979-4-27 Riverside Santa Ana Mountains along road; drying mud of vernal pools; Wildomar 7.5'Q Comment
  UCR216923  Psilocarphus brevissimus George K. Helmkamp, E. A. Helmkamp 2010-5-4 15954 B Solano Sacramento Valley, 6.5 air mi NNW of Vacaville, Pleasants Valley Road, 6.1 miles north of its junction with Vaca Valley Road 78 Comment
  CLARK-A1045-106  Psoralea californica George K. Helmkamp 1978-5-20 Riverside Pinyon Flats Campground southwest 1/4 Palm Desert 15'Q Comment
  UCR13823  Psorothamnus polydenius George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  UCR130050  Psorothamnus spinosus George K. Helmkamp, E. A. Helmkamp 1998-6-27 4106 Riverside Coachella Valley., Along Calif. Hwy 74 at the south end of Palm Desert 290 Comment
  SEINET9261503  Pteridium aquilinum subsp. pubescens George K. Helmkamp, Amy Barnes 2013-1 22319 Alpine Northern Sierra Nevada Mountains: northern edge of Mosquito Lake along CA-4/Ebbetts Pass road (Pacific Valley 7.5' Q) 2454 Comment
  SD240771  Pteridium aquilinum var. pubescens G. K. Helmkamp, E. A. Helmkamp 2009-6-10 14936 Shasta Southern Cascade Range: Alvord Road, 0.2 mile south of its junction with CA-44, junction is 1.1 miles east of Shingletown (Shingletown 7.5'Q) 938 Comment
  UCR170347  Pteridium aquilinum var. pubescens George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9895 El Dorado Northern Sierra Nevada Foothills, Wright's Lake Road (Forest Road 4) 2.1 road miles N of US Highway 50 (c. 5-6 mi east of Kyburz) 1854 Comment
  UCR219636  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2009-10-22 15699 El Dorado Sierra Nevada Mountains Foothills, Pollock Pines, Blair Road just south of its junction with Forebay Road 1125 Comment
  RSA757001  Pterospora andromedea George K. Helmkamp, E. A. Helmkamp 2009-7-30 15327 Calaveras Ganns Meadow Drive just south of its junction with CA-4, 16.7 miles northeast of Arnold 2067 Comment
  UCR207431  Pterospora andromedea George K. Helmkamp, E. A. Helmkamp 2009-7-30 15327 Calaveras Sierra Nevada Mountains, Ganns Meadow Drive just south of its junction with CA-4, 16.7 miles northeast of Arnold 2067 Comment
  UCR91694  Pterostegia drymarioides George K. Helmkamp 1996-5-25 1058 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  UCR67020  Pteryxia terebinthina George K. Helmkamp 1990-8-2 s.n. Mono Eastern Sierra Nevada Mountains, between Mammoth and Lake Mary 2591 Comment
  CLARK-A1045-691  Purshia glandulosa George K. Helmkamp 1977-5-15 San Bernardino Mojave Desert Kelso [Cima?] Road; Kelso 15' Q Comment
  UCR79300  Purshia glandulosa George K. Helmkamp 1993-9-22 32- 02 San Bernardino San Bernardino Mtns./Mojave Desert, 5.9 mi up Burns Canyon from crossing of Pioneertown and Pipes Canyon Roads 1585 Comment
  UCR103834  Pyrrocoma lanceolata George K. Helmkamp, E. A. Helmkamp 1997-9-10 2347 Mono Eastern Sierra/ Great Basin, River Spring Lakes, 3.1 mi. NE of Calif. Hwy 120 on River Springs Rd 1979 Comment
  UCR133161  Pyrrocoma uniflora George K. Helmkamp 1993-10-7 40- 04 Mono Owens Valley, beside Owens River, 3 miles upstream from Benton's Crossing 2165 Comment
  CAS-BOT-BC62722  Quercus chrysolepis G. K. Helmkamp; E. A. Helmkamp 2008-5-4 13384 Amador Sierra Nevada Mountains Foothills: along Tiger Creek Road, 2.8 miles east of CA-88; at the entrance to 744 Comment
  UCD63219  Quercus douglasii G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13039 Sutter Sacramento Valley. Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  SD240764  Quercus kelloggii G. K Helmkamp, E. A. Helmkamp 2006-10-26 11575 El Dorado Northern Sierra Nevada Mountains Foothills: Oak Hill Drive 1.3 miles south of Pleasant Valley Road at Tiger Lily (Placerville 7.5'Q) 671 Comment
  RSA749734  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-14 14258 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  RSA0053695  Quercus wislizeni var. wislizeni G. K. Helmkamp, E. A. Helmkamp 2007-9-17 12973 Yolo West edge of Sacramento Valley: Capay Valley, Brick Chimney Canyon; along Count Road 78A, 2.4 miles southwest of its junction with CA-16 and about 3 miles west of Capay. 113 Comment
  UCD55749  Quercus wislizeni var. wislizeni G. K. Helmkamp; Elizabeth Helmkamp 2006-5-4 10291 El Dorado Northern Sierra Neveda foothills, east end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Hwy. CA-49. 542 Comment
  UCR159309  Rafinesquia californica George K. Helmkamp, E. A. Helmkamp 2005-4-22 9384 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR169952  Ranunculus George K. Helmkamp 2004-6-9 8614 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park along Mesa View Dr (Calif. Hwy 1), 0.3 mi south of Halcyon Rd. 76 Comment
  SEINET1908703  Ranunculus alismifolius var. alismifolius G. K. Helmkamp, E. A. Helmkamp 2007-1 12221 El Dorado Northern Sierra Nevada Mountains; Wright's Lake Road, north of US-50 at the Lyon's Creek trailhead and creek crossing 2057 Comment
  UCR258236  Ranunculus bonariensis var. trisepalus George K. Helmkamp, Amy Barnes 2013-3-28 20251 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  SEINET3282817 Image available Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 2007-4-27 11864 El Dorado Foothills, Northern Sierra Nevada Mountains; junction of Ice House Road and White Meadows Road, about 2 miles northwest of US-50. 1029 Comment
  UCR103803  Ranunculus californicus George K. Helmkamp 1997-3-8 1463 San Luis Obispo Central Coast 7.5' Q., SE of Los Osos. Swift Ranch, starting c. 2 mi. south of Los Osos Valley Rd on Clark Valley Rd. 107 Comment
  UCR187295  Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 2007-4-5 11734 Amador Foothills, Northern Sierra Nevada Mountains, Sutter to Ione Road, 0.4 mi east of CA-49, northeast of Ione 180 Comment
  UCR184841  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2007-5-7 11950 El Dorado Foothills, Northern Sierra Nevada Mountains, Pedro Hills Road, 0.3 mile west of the junction with Calif. Hwy 49, junction 5.3 miles south of Cool 299 Comment
  SD255688  Raphanus raphanistrum George K. Helmkamp, Mary Alice Barnes 2013-5-13 20568 Amador Sierra Nevada Mountains Foothills: along E-16/Shenandoah Road, 3.6 road miles south of River Pines, 4.15 air miles NE (39a^z) of Plymouth (Fiddletown 7.5'Q) 516 Comment
  UCR253815  Raphanus raphanistrum George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20100 Placer Sacramento Valley, South Dowd Road, 0.1 mile south of its junction with Moore Road, southwest of Lincoln 34 Comment
  UCR197500  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2008-3-22 13221 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, along CA-26, 3.7 miles southwest of Valley Springs at Lime Creek Road 143 Comment
  UCR242767  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2010-4-14 15847 Solano Northern San Joaquin Valley, Tremont Road, 0.8 mile west of Mace Blvd, 3.8 mi. (air) SE of Davis 3 Comment
  UCR242796  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2010-4-3 15813 A Amador Foothills Northern Sierra Nevada Mountains, Willow Creek Road, 1.2 miles north of its junction with CA-124, 3.7 mi. NE (22 deg. ) of Ione 175 Comment
  UCR122568  Rhamnus californica subsp. californica George K. Helmkamp, E. A. Helmkamp 2000-4-21 5445 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  SEINET4691383  Rhamnus tomentella subsp. tomentella George K. Helmkamp, E. A. Helmkamp 2011-1 17790 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road just northeast of its junction with CA-174, 1.25 mi. east (91 degrees) of Peardale. 778 Comment
  UCR130639  Rhus ovata George K. Helmkamp, E. A. Helmkamp 1999-4-15 4658 San Diego Peninsular Ranges, c. 5 mi NE of Alpine. Old Viejas Grade at the E side of Viejas Mtn., 0.6 mi east of the Viejas Indian Reservation 854 Comment
  UCR140059  Rhus ovata George K. Helmkamp 2004-4-21 8505 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR233317  Ribes roezlii var. roezlii George K. Helmkamp, E. A. Helmkamp 2011-9-13 18262 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road, 0.6 miles north of its junction with CA-88 2136 Comment
  RSA792001  Rorippa George K. Helmkamp, E. A. Helmkamp 2012-7-2 19317 Amador Northern Sierra Nevada Mountains: Bear River Road, 3.0 miles east of the Lower Bear River Reservoir dam. 1816 Comment
  CAS-BOT-BC154076  Rorippa curvipes G. K. Helmkamp; E. A. Helmkamp 1998-8-11 4322 Mono White Mountains: Campito Meadow, west of White Mtn. Rd at Poison Creek 3293 Comment
  UCR141107  Rorippa curvipes George K. Helmkamp, E. A. Helmkamp 1998-8-11 4322 Mono White Mountains, Campito Meadow, west of White Mountain Road at Poison Creek 3293 Comment
  UCR197602  Rorippa curvisiliqua George K. Helmkamp, E. A. Helmkamp 2008-6-23 13732 Amador Northern Sierra Nevada Mountains, Dufrene Road, 1.1 miles south of its junction with CA-88 (jct. is between Mormon Emigrant Trail and Bear River Reservoir Road), c. 2 miles (air) north of the west end of Lower Bear River Reservoir 2055 Comment
  UCR104812  Rosa californica George K. Helmkamp 1997-6-20 2054 San Luis Obispo Central Coast, Los Osos, c. 0.2 mi. NE of Buckskin & Martingale 27 Comment
  UCR231870  Rosa californica George K. Helmkamp, E. A. Helmkamp 2010-10-16 17026 Placer Northern Sierra Nevada Mountains Foothills, along Forest Route 24 at Parker Flat and beside Forbes Creek, 1.9 miles east (airline) of the Sugar Pine Reservoir dam 1180 Comment
  UCR231851  Rubus laciniatus George K. Helmkamp, E. A. Helmkamp 2010-8-11 16752 Placer Northern Sierra Nevada Mountains, Finning Mill Road, 1.2 miles north of Forest Hill Road, at the crossing of Mill Creek 1085 Comment
  UCR123908  Rubus parviflorus George K. Helmkamp, E. A. Helmkamp 2001-7-7 6917 Tehama Sierra Nevada Mountains, Calif. Hwy 36, 2.6 mi west of Mineral, about 33 mi west of Chester, Lake Almanor 1418 Comment
  UCR140149  Rubus ursinus George K. Helmkamp 2004-2-6 8241 San Luis Obispo Central Coast, entrance to Oso Flaco Lake, SW of Nipomo 6 Comment
  RSA0012137  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2011-7-7 17653 El Dorado Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  RSA0035673  Rumex acetosella George K. Helmkamp, Mary Alice Barnes 2013-5-3 20465 Placer SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road 974 Comment
  UCR123528  Rumex acetosella George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6891 Tehama Northern Sierra Nevada Mountains, SE of Mt. Lassen; Calif. Hwy 36/89 at Gurnsey Creek, about 2 mi north of junction with Calif. Hwy 32 1448 Comment
  UCR208563  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2009-5-4 14587 El Dorado Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 3.6 miles east of Sly Park Rd. and Jenkinson Lake 1226 Comment
  UCR218118  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2010-6-26 16404 Placer Sierra Nevada Mountains Foothills, Yankee Jim's Road in Bunch Canyon, 0.5 mile southeast of its junction with Canyon Way 591 Comment
  UCR245602  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2012-5-31 19104 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCR252986  Rumex acetosella George K. Helmkamp, Amy Barnes 2013-9-23 22323 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  UCR257627  Rumex acetosella George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19524 Placer Northern Sierra Nevada Mountains, Sugar Bowl Road, 0.4 mile south of its junction with Donner Pass Road, just west of Lake Mary 2136 Comment
  CAS-BOT-BC228595  Rumex californicus George K. Helmkamp; William Barnes 2010-9-4 16936 El Dorado Northern Sierra Nevada Mountains: Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  CHSC100665  Rumex crispus G. K. Helmkamp 2004-3-23 8397 San Luis Obispo Central Coast: ENE of Nipomo; 1.5 mi SW of Rancho Rd along Dana Foothill Rd. 171 Comment
  UCR123958  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6984 Humboldt North Coast, CA Hwy 36, along the Van Duzen River, 19.6 mi east of CA Hwy 101, west of Bar W Road 137 Comment
  UCR259880  Rumex crispus George K. Helmkamp, Elizabeth Helmkamp 2013-10-22 22454 Amador Sierra Nevada Mountains Foothills, Shenandoah Road, near Sobon Creek, 6.8 miles northeast of its junction with CA-49 in Plymouth 563 Comment
  UCR104881  Rumex obtusifolius George K. Helmkamp, E. Helmkamp 1998-2-10 2687 Imperial Sonoran (Colorado) Desert, SE Salton Sea, vicinity of Wister, drainage ditch at the jct of Pound & Davis Streets. -66 Comment
  UCR188442  Rumex obtusifolius George K. Helmkamp, E. A. Helmkamp 2007-9-26 13022 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 2.3 miles east of Jenkinson Lake 1226 Comment
  UCR116018  Rumex paucifolius George K. Helmkamp, E. A. Helmkamp 2000-7-18 5880 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  UCR15008  Rumex paucifolius George K. Helmkamp 1976-6-22 s.n. Mono Sierra Nevada Mtns, Mammoth Lakes Village, roadside 2393 Comment
  UCR122609  Rumex salicifolius George K. Helmkamp, E. A. Helmkamp 1998-8-12 4379 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR248409  Rumex salicifolius var. salicifolius George K. Helmkamp, Belinda Pesheck 2013-7-14 21065 Alpine Northern Sierra Nevada Mountains, off Blue Lakes Road, 9.4 miles south of CA-88, between a private dirt road and Charity Valley Creek 2409 Comment
  UCR248663  Rumex salicifolius var. salicifolius George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22229 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  UCD101478  Rumex triangulivalvis G. K. Helmkamp; E. A. Helmkamp 2007-8-4 12708 El Dorado Northern Sierra Nevada Mountains. Along Mormon Emigeant Trail at Leek Spring meadow, about 2 miles northwest of CA-88. 2237 Comment
  RSA613936  Rupertia physodes George K. Helmkamp 1997-3-8 1443 San Luis Obispo SE of Los Osos. Swift Ranch, starting ca. 2 mi. S of Los Osos Valley Rd on Clark Valley Rd. 107 Comment
  HSC79238  Salazaria mexicana G. K. Helmkamp 1983-10-8 - 32 Riverside TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside pipeline road 762 Comment
  UCR116699  Salix exigua George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Mill Creek Canyon, Thurman Flats Picnic Area, on Hwy 38 c. 3.5 mi. east of Mill Creek Ranger Station. 1037 Comment
  UCR257062  Salix gooddingii George K. Helmkamp, Mary Alice Barnes 2013-5-17 20622 Calaveras Northern Sierra Nevada Mountains Foothills, Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs 279 Comment
  CAS-BOT-BC249045  Salix jepsonii George K. Helmkamp; E. A. Helmkamp 2010-7-28 16671 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 1.6 miles west of the junction with Soda Springs Road at Robinson Flat 2040 Comment
  UCD111623  Salix lasiolepis G. K. Helmkamp; E. A. Helmkamp 2006-2-24 10066 El Dorado Northern Sierra Nevada: 1.5 mi NW of Greenwood along CA Highway 193. 537 Comment
  UCR123537  Salix lasiolepis George K. Helmkamp, E. A. Helmkamp 2000-4-25 5586 Kern Tehachapi Mountains, Water Cyn Rd SW of Tehachapi and 1.0 mi south of Highline 1494 Comment
  UCR171036  Salix lasiolepis George K. Helmkamp, E. A. Helmkamp 2006-2-24 10066 El Dorado Northern Sierra Nevada Foothills, 1.5 mi NW of Greenwood along Calif. Highway 193 537 Comment
  UCR198461  Salix lasiolepis George K. Helmkamp, E. A. Helmkamp 2008-3-12 13150 Amador Foothills, northern Sierra Nevada Mountains, 0.2 mile east of the junction of Bell Road and CA-49 at Enterprise; junction of Plymouth and Pigeon Creeks 259 Comment
  UCR257591  Salix lasiolepis George K. Helmkamp, Elizabeth Helmkamp 2014-2-22 22533 Placer Sierra Nevada Mountains Foothills, North Auburn, corner of Bell Road and Olympic Way, 0.7 mi. west of CA-49 433 Comment
  SEINET3259914 Image available Salix lucida subsp. caudata George K. Helmkamp, E. A. Helmkamp 2008-8-8 13991 Alpine Northern Sierra Nevada Mountains; along CA-89, 1.4 miles east of Luther Pass. 2262 Comment
  UCR123403  Salix planifolia subsp. planifolia George K. Helmkamp, E. A. Helmkamp 1998-8-12 4377 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR189212  Salsola tragus George K. Helmkamp, E. A. Helmkamp 2007-9-11 12941 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50 at Strawberry 1741 Comment
  UCR130255  Salvia columbariae George K. Helmkamp, E. A. Helmkamp 2001-4-27 6510 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  UCR145625  Salvia columbariae George K. Helmkamp, E. A. Helmkamp 2000-4-24 5489 Monterey Central Outer Coast Range, Nacimiento Road, 12 mi north of Gorda and 3.8 mi east of CA Hwy 1, ridge above Kirk Creek 305 Comment
  CLARK-A1045-181  Salvia dorrii George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5'Q Comment
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Jul 21 2021
  SD140088  Salvia dorrii var. pilosa Geoge Helmkamp 1993-4-24 San Bernardino Between Kelbaker Road and the Granite Mountains; 5.1 miles northeast of U. S. 40. 1219 Comment
  SD130328  Salvia sonomensis George Helmkamp 1990-4-19 San Luis Obispo West Cuesta Ridge, 3.0 miles northwest of US 101, north of San Luis Obispo. 671 Comment
  SEINET4691735  Sambucus nigra subsp. caerulea George K. Helmkamp, Amy Barnes 2013-1 22353 Calaveras Northern Sierra Nevada Mountains: SE side of White Pines Reservoir, 0.6 mile NE of Arnold. 1184 Comment
  SD254703  Sanguisorba minor subsp. muricata George K. Helmkamp, Elizabeth Helmkamp 2013-10-14 22416 Placer Sierra Nevada Mountains Foothills: Yankee Jim Road, 3.6 mile northwest of its junction with Foresthill Road. 651 Comment
  SEINET4560808  Sanguisorba minor subsp. muricata George K. Helmkamp, E. A. Helmkamp 2010-1 17017 Placer Northern Sierra Nevada Mountains Foothills: Yankee Jim's Road, 0.5 miles north of Forest Hill Road in Foresthill, near intersection with Mayflower rd. 948 Comment
  UCR176250  Sanguisorba minor subsp. muricata George K. Helmkamp, E. A. Helmkamp 2006-8-11 11217 Placer Northern Sierra Nevada Mtns foothills, along Forest Hill Rd., 8.7 miles northeast of Forest Hill 1311 Comment
  UCR194937  Sanguisorba minor subsp. muricata George K. Helmkamp, E. A. Helmkamp 2007-5-18 12016 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 2.8 miles southeast of Foresthill 814 Comment
  UCD127919  Sanicula arguta G. K. Helmkamp; E. A. Helmkamp 2001-4-29 6584 San Luis Obispo San Luis Obispo County: Irish Hills, Clark Valley Road, 4.2 miles south of Los Osos Valley Road (East of Los Osos.) 274 Comment
  SD237290  Sanicula bipinnatifida G. K. Helmkamp, E. A. Helmkamp 2007-4-5 11730 Amador Foothills, Northern Sierra Nevada Mountains: Sutter to Ione Road, 0.4 mi east of CA-49, northeast of Ione. 180 Comment
  UCD128009  Sanicula bipinnatifida G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10353 Amador Northern Sierra Nevada Foothills: Along CA Hwy 88, 0.9 mi. S of the El Dorado County line at Enterprise. 274 Comment
  RSA667078  Sanicula crassicaulis George K. Helmkamp, E. Helmkamp 2001-6-2 6784 San Mateo Central CA coast: Purissima Crk Rd, E of Half Moon Bay at Purissima Crk, 3.2 mi E of CA-1 244 Comment
  UCD127979  Sanicula crassicaulis G. Helmkamp 1997-3-8 1453 San Luis Obispo San Luis Obispo County: SE of Los Osos. Swift Ranch, starting around 2 miles south of Los Osos Valley Road on Clark Valley Road. 106 Comment
  UCR15621  Sanicula crassicaulis George K. Helmkamp 1978-4-23 s.n. San Luis Obispo Central Coast, Montana de Oro State Park Comment
  UCR232208  Sanicula crassicaulis George K. Helmkamp, E. A. Helmkamp 2011-6-7 17493 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  SD243063  Sanicula tuberosa George K. Helmkamp, E. A. Helmkamp 2010-7-28 16669 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 1.6 miles west of the junction with Soda Springs Road at Robinson Flat. 2040 Comment
  UCD128045  Sanicula tuberosa G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12062 Placer Northern Sierra Nevada Mountains: Humbug Canyon Road, 0.2 mile northwest of Forest Hill Road, generally southwest of Westville. 1576 Comment
  UCD128046  Sanicula tuberosa G. K. Helmkamp; E. A. Helmkamp 2007-6-6 12266 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road. 1616 Comment
  UCR189607  Sanicula tuberosa George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12380 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 17.2 miles ESE of its junction with Sly Park Road at Jenkinson Lake 2128 Comment
  CLARK-A1045-125  Sarcostemma hirtellum George K. Helmkamp 1977-3-20 Riverside Deep Canyon dry wash of Deep Canyon; Palm Desert 15'Q Comment
  UCR173248  Scandix pecten-veneris George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10459 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along an unnamed road to Lake Clementine, 1.2 mi. N of Forest Hill Road 422 Comment
  UCR206400  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14377 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR238587  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2012-3-31 18664 Placer Northern Sierra Nevada Mountains Foothills, Old Foresthill Road, 0.7 mile northeast of its junction with CA-49 and the American River Crossing 258 Comment
  UCR104057  Schismus barbatus George K. Helmkamp, E. A. Helmkamp 1998-3-16 2821 San Bernardino Mojave Desert, 50 ft. north of the boundary of Joshua Tree National Park at the S end of Sunkist Rd (E of town of Joshua Tree) 884 Comment
  CLARK-A1045-1276  Scirpus microcarpus George K. Helmkamp 1979-6-6 San Diego Pala Creek beside Creek, 2 miles north of Pala; Pechanga 7.5'Q Comment
  UCR122382  Scirpus microcarpus George K. Helmkamp, E. A. Helmkamp 2001-7-8 7001 Humboldt North Coast, north spit of Samoa Peninsula, 0.5 mi north of CA Hwy 255 bridge over Humboldt Bay 6 Comment
  UCR134423  Scirpus microcarpus George K. Helmkamp 2003-9-19 8144 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR176045  Scirpus microcarpus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11007 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR189214  Scirpus microcarpus George K. Helmkamp, E. A. Helmkamp 2007-9-11 12939 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50 at Echo Summit 2256 Comment
  UCR245500  Scirpus microcarpus George K. Helmkamp, Amy Barnes 2013-9-24 22357 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCD98513  Scleranthus annuus subsp. annuus G. K. Helmkamp; E. A. Helmkamp 2007-5-9 11979 El Dorado Northern Sierra Nevada Mountains; Ice House Road, 2 miles northeast of US-50, 1.25 miles NE of Riverton. 1220 Comment
  UCR197644  Sedum lanceolatum George K. Helmkamp, E. A. Helmkamp 2008-7-16 13841 Alpine Northern Sierra Nevada Mountains, 0.1 mile south of CA-88 on a dead-end spur south of Carson Pass 2595 Comment
  UCR188241  Sedum obtusatum subsp. obtusatum George K. Helmkamp, E. A. Helmkamp 2007-4-27 11862 El Dorado Foothills, Northern Sierra Nevada Mountains, Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House 1027 Comment
  UCR145626  Selaginella bigelovii George K. Helmkamp, E. A. Helmkamp 2000-4-24 5490 Monterey Central Outer Coast Range, Nacimiento Road, 12 mi north of Gorda and 3.8 mi east of CA Hwy 1, ridge above Kirk Creek 305 Comment
  UCR122625  Senecio breweri George K. Helmkamp, E. A. Helmkamp 2002-4-23 7605 San Benito Inner South Coast Ranges, County Hwy J-1(Panoche Rd) 15.6 mi SE of its junction with CA Hwy 25; along Tres Pinos Creek 671 Comment
  UCR88327  Senecio cymbalarioides George K. Helmkamp 1995-9-23 3 31 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  UCR132165  Senecio flaccidus var. monoensis George K. Helmkamp, E. A. Helmkamp 1993-7-28 177 Mono Sierra Nevada Mountains, Long Valley along Owens Gorge Road about 5 mi north of Tom's Place 2256 Comment
  UCR15595  Senecio fremontii var. occidentalis George K. Helmkamp 1978-5-30 s.n. Mono Eastern Sierra Nevada Mtns., c. 2 mi north of Conway Summit of Hwy US-395 2134 Comment
Read comments
Aug 5 2017
  UCR14372  Senecio hydrophilus George K. Helmkamp 1974-7-26 s.n. Mono Owens Valley, Big Springs at water's edge, Owens River 2195 Comment
  CLARK-A1045-1426  Senecio integerrimus var. exaltatus George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada 2 miles east of Yosemite Creek on the way to Porcupine Flats; dry slope, coniferous forest; ; Yosemite Falls 7.5'Q 2682 Comment
  UCR121757  Senecio integerrimus var. exaltatus George K. Helmkamp, E. A. Helmkamp 1998-8-11 4326 Mono White Mountains, Campito Meadow, west of White Mountain Road at Poison Creek 3293 Comment
  UCR219040  Senecio integerrimus var. major George K. Helmkamp, E. A. Helmkamp 2010-7-13 16517 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  UCR176437  Senecio triangularis George K. Helmkamp, E. A. Helmkamp 2006-8-7 11192 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  UCR197511  Senecio triangularis George K. Helmkamp, E. A. Helmkamp 2008-7-11 13766 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring Road, 8.0 miles southwest of Kirkwood and 0.1 mile north of its junction with CA-88 2421 Comment
  UCR248373  Senecio triangularis George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21022 Amador Northern Sierra Nevada Mountains, Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 Comment
  UCR147032  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2004-10-8 8836 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCR237585  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-3-9 18607 Yolo Sacramento Valley, East Main Street (Co. Rd. 22), Woodland (parallel to I-5), 1.7 mile west of the Sacramento River 7 Comment
  UCR258382  Sericocarpus oregonensis George K. Helmkamp, Amy Barnes 2014-8-11 22982 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 Comment
  UCR101676  Sherardia arvensis George K. Helmkamp, E. A. Helmkamp 1998-5-16 3750 San Mateo Portola Valley, Golden Hills Rd along Los Trancos Creek 107 Comment
  SD248363  Sibara virginica George K. Helmkamp, Amy Barnes 2013-3-28 20278 Sutter Sacramento Valley: Hageman Road just south of its junction with CA-20, east of Meridian (Sutter Buttes 7.5'Q) 17 Comment
  SEINET7929947  Sidalcea glaucescens George K. Helmkamp, E. A. Helmkamp 2009-8-4 15384 Alpine Sierra Nevada Mountains: along CA-4 at the trailhead for Ebbetts Pass, 12.8 miles southwest of the CA-4 junction with CA-89 (Ebbetts Pass).; 0 2637 Comment
  UCR245571  Sidalcea glaucescens George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22234 Alpine Northern Sierra Nevada Mountains, Silver Creek, along CA-4, 5.0 miles west of its junction with CA-89 1927 Comment
  UCD116737  Sidalcea hartwegii G. K. Helmkamp; E. A. Helmkamp 2007-4-20 11763 El Dorado Northern Sierra Nevada Mountains, 2.2 miles north of US-50 on Bass Lake Road, overlooking Bass Lake, between El Dorado Hills and Cameron Park. 384 Comment
  UCR248405  Sidalcea malviflora subsp. asprella George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 22000 El Dorado Northern Sierra Nevada Mountains, Hell's Delight Road, just west of the junction with Silver Fork Road, 2.8 miles north of CA-88 2006 Comment
  UCR121470  Sidalcea oregana subsp. spicata George K. Helmkamp, E. A. Helmkamp 1999-6-29 5046 Nevada Northern Sierra Nevada Range, Prosser Creek at Hobart Mills, c. 50-100 yards east of Calif. Hwy 89, NE of Lake Tahoe 1707 Comment
  UCR256487  Silene californica George K. Helmkamp, Amy Barnes 2014-5-8 22840 Amador Sacramento Valley/Sierra Nevada Foothills, Tonzi Road, 0.4 mile east of its junction with CA-124, 4.5 air miles NE (35 deg. ) of Ione 188 Comment
  UCR107311  Silene gallica George K. Helmkamp, E. A. Helmkamp 1998-5-16 3717 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; 3.2 mi south of Camden Ave. 152 Comment
  UCR218178  Silene gallica George K. Helmkamp, E. A. Helmkamp 2010-5-31 16177 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 2.8 miles east of the village of Sutter Creek 427 Comment
  CLARK-A1045-1425  Silene lemmonii George K. Helmkamp 1977-8-6 Mariposa Sierra Nevada 2 miles east of Yosemite Creek on the way to Porcupine Flats; dry slope under pines; ; Yosemite Falls 7.5'Q 2682 Comment
  UCR176059  Silene lemmonii George K. Helmkamp, E. A. Helmkamp 2006-7-12 10982 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  CAS-BOT-BC229021  Silene verecunda George K. Helmkamp; Ann Kerchner; Amy Barnes 2011-8-13 18058 Calaveras Northern Sierra Nevada Mountains: Black Springs Road (Forest Route 6N45?), 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  SD224898  Sisymbrium altissimum G. K. Helmkamp 1997-9-30 2494 Inyo East side of the White Mountains 1707 Comment
  SEINET1908453  Sisymbrium altissimum G. K. Helmkamp, E. A. Helmkamp 2008-1 13883 Alpine Eastern Sierra Nevada Mountains: Carson River road, 0.4 mile east of its west junction with CA-88. 1713 Comment
  UCR122192  Sisymbrium irio George K. Helmkamp, E. A. Helmkamp 2002-4-23 7560 Fresno Central Valley; San Joaquin Valley, along CA Hwy 180, 10.8 mi west of CA Hwy 145 107 Comment
  RSA791742  Sisymbrium officinale George K. Helmkamp, E. A. Helmkamp 2012-5-3 18899 El Dorado Northern Sierra Nevada Mountains Foothills: Forebay Road north of Pollock Pines, at the south side of the bridge over the South Fork American River. 591 Comment
  UCR188015  Sisymbrium officinale George K. Helmkamp, E. A. Helmkamp 2007-5-1 11924 El Dorado Foothills, Northern Sierra Nevada Mountains, along Hwy CA-49 at the junction with Teal Road, 3.0 miles northwest of US-50 in Placerville 558 Comment
  SEINET13203116 Image available Sisyrinchium bellum George K. Helmkamp 2014-1 22743 Nevada Northern Sierra Nevada Mountains Foothills: along CA-120, 2.3 miles west of its junction with CA-49 in Grass Valley (Grass Valley 7.5' Q.) 728 Comment
  UCD138876  Sisyrinchium bellum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10385 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 Comment
  UCR256511  Sisyrinchium bellum George K. Helmkamp, Amy Barnes 2014-5-8 22864 El Dorado Sierra Nevada Mountains Foothills, along CA-49 near Ramales Lane, c. 0.7 mile north of Union Mine Road junction 282 Comment
  UCR191063  Smilacina racemosa George K. Helmkamp, E. A. Helmkamp 2007-6-6 12281 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 3.2 miles south of it junction with Mormon Emigrant Trail, east of Jenkinson Lake and near Diamond Creek 1189 Comment
  UCR122985  Solanum douglasii George K. Helmkamp, E. A. Helmkamp 2001-6-2 6782 San Mateo San Francisco Bay Region, Purisima Creek Road, east of Half Moon Bay at Purisima Creek, 3.2 miles east of CA Hwy 1 244 Comment
  UCR91834  Solanum douglasii George K. Helmkamp 1996-5-25 1055 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  SD143696  Solanum umbelliferum G. K. Helmkamp, E. A. Helmkamp 1998-4-8 3247 Kern 2.3 mi. NE of Cerro Noroeste Rd along CA hwy 33, SW of Maricopa, roadside 793 Comment
  UCR130100  Solanum umbelliferum George K. Helmkamp, E. A. Helmkamp 2000-4-24 5559 Monterey Inner South Coast Ranges, Salinas Valley, 6 miles south of King City and 0.6 mile east of G-14 (Jolon Rd) on San Lucas Rd. 183 Comment
  UCR61758  Solanum umbelliferum George K. Helmkamp 1990-4-19 s.n. San Luis Obispo Along State Hwy 58, c. 2 mi NE of 7 mi Road, just before the Kern County line. 884 Comment
  UCR88348  Solanum xanti George K. Helmkamp, E. A. Helmkamp 1995-6-20 95- 2 - San Luis Obispo Bear Creek Ranch, SE of Los Osos. 6 mi SE of Los Osos on Clark Valley Rd 396 Comment
  UCR201521  Solidago canadensis subsp. elongata George K. Helmkamp, E. A. Helmkamp 2008-8-20 14014 Placer Northern Sierra Nevada Mountains, Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR231869  Solidago canadensis subsp. elongata George K. Helmkamp, E. A. Helmkamp 2010-10-16 17027 Placer Northern Sierra Nevada Mountains Foothills, along Forest Route 24 at Parker Flat and beside Forbes Creek, 1.9 miles east (airline) of the Sugar Pine Reservoir dam 1180 Comment
  UCR233033  Solidago canadensis subsp. elongata George K. Helmkamp, E. A. Helmkamp 2011-9-23 18308 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 8.6 miles north of its junction with US-50 1613 Comment
  UCR258130  Solidago canadensis subsp. elongata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19550 Amador Northern Sierra Nevada Mountains, West Lake Road along the west side of Silver Lake; 4.1 miles north of junction with Plasse Road 2247 Comment
  UCR258393  Solidago canadensis subsp. elongata George K. Helmkamp, Amy Barnes 2014-8-11 23000 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  SEINET3123354 Image available Solidago canadensis subsp. elongata George K. Helmkamp, E. A. Helmkamp 2006-1 11022 El Dorado Northern Sierra Nevada Mtns: North Truckee River Rd., 1.4 miles north of CA-50 and ca. 6 miles south of Lake Tahoe 2009 Comment
  HSC79163  Solidago confinis G. K. Helmkamp 1983-10-8 - 2 San Bernardino Big Morongo Preserve of The Nature Conservancy, Morongo Valley, near the house in the San Bernardino Co. owned area. 762 Comment
  UCR37501  Sonchus asper George K. Helmkamp 1984-4-20 840420- 36 San Bernardino Little San Bernardino Mountains, Big Morongo Preserve of The Nature Conservancy, south of the town of Morongo Valley in Big Morongo Canyon 765 Comment
  OBI37465  Sonchus asper G. Helmkamp 1985-5-4 448 San Bernardino Morongo Cyn; SE of Morongo Valley. Along the Mesquite Trl at the old dam 747 Comment
  UCR147034  Sonchus asper subsp. asper George K. Helmkamp, E. A. Helmkamp 2004-10-8 8839 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCR238743  Sonchus asper subsp. asper George K. Helmkamp, E. A. Helmkamp 2012-2-9 18540 Glenn Sacramento Valley, Norman Road/ Rd. 68, 0.4 mile west of the Colusa County line, beside the Sacramento National Wildlife Refuge 24 Comment
  UCR140145  Sonchus oleraceus George K. Helmkamp 2004-2-7 8257 San Luis Obispo Central Coast, SE of Oceano along Halcyon Rd., just east of Mesa View Dr. 76 Comment
  UCR161332  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2005-3-5 9007 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness north of Lake Lopez, Upper Lopez Canyon Road, 7.2 mi north of jct with Lopez Road and at Water End Road 174 Comment
  UCR253621  Sonchus oleraceus George K. Helmkamp 2014-3-11 22537 Nevada Sierra Nevada Mountains Foothills, Auburn, southbound on CA-49 about 0.1 mile east of Lincoln Way 402 Comment
  SEINET3246219  Sorghum halepense G. K. Helmkamp, E. A. Helmkamp 2008-1 14284 Sacramento Southern Sacramento Valley: Highway E13 (Twin Cities Road), 3.5 miles west of CA-99. 18 Comment
  UCR200883  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-9-18 14131 Yuba Foothills, northern Sierra Nevada Mountains, Bullards Bar Dam, along Marysville Road, 6 miles southwest of its junction with CA-49 616 Comment
  UCR233018  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2011-5-12 17275 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR253816  Sorghum halepense George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20099 Placer Sacramento Valley, South Dowd Road, 0.1 mile south of its junction with Moore Road, southwest of Lincoln 34 Comment
  UCR258183  Sorghum halepense George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20038 Placer Sierra Nevada Mountains Foothills, city of North Auburn, corner of Locksley Lane and CA-49 384 Comment
  UCR259852  Sorghum halepense George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22438 Amador Sierra Nevada Mountains Foothills, Plymouth, at the junction of Mineral Street and Mill Street, near Hwy CA-49 329 Comment
  SEINET4560891  Spergula arvensis subsp. arvensis George K. Helmkamp, E. A. Helmkamp 2012-1 18599 Amador Northern Sierra Nevada Mountains Foothills: along CA-124 (E Plymouth Hwy), 1.2 miles northeast of Ione. 169 Comment
  UCR231341  Spergularia macrotheca var. leucantha George K. Helmkamp, E. A. Helmkamp 2011-5-6 17191 Yuba East edge of Sacramento Valley, Camp Far West Road, 0.9 mile west of the junction at Camp Far West Reservoir 65 Comment
  UCR140146  Spergularia macrotheca var. macrotheca George K. Helmkamp 2004-2-10 8268 San Luis Obispo Central Coast, southeast of Oceano along Halcyon Rd., 0.2 mi east of Mesa View Dr. 76 Comment
  UCR37619  Spergularia marina George K. Helmkamp 1984-5-2 D- 30 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 Comment
  UCR100930  Spergularia rubra George K. Helmkamp, E. A. Helmkamp 1998-4-9 3259 Kern 14 mi. NE of Taft; along Tupman Rd just north of its intersection w/ Calif. hwy 199 (W of the outlet canal). 91 Comment
  UCR179332  Spergularia rubra George K. Helmkamp, E. A. Helmkamp 2006-10-10 11523 Yuba Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49 just north of the Nevada County line at the Middle Yuba River bridge 451 Comment
  CLARK-A1045-1008  Sphaeralcea ambigua George K. Helmkamp 1977-4-23 Inyo Panamint Mountains east of Townes Pass; ; Panamint Butte, 7.5' Q 1219 Comment
  UCR103823  Sphenosciadium capitellatum George K. Helmkamp, E. A. Helmkamp 1997-9-10 2338 Mono Eastern Sierra Nevada, Inyo National Forest at Pilot Spring, c. 5 mi. SE of Calif. Hwy 120, SE of Mono Lake & north of Mono Craters 2302 Comment
  UCR134700  Sphenosciadium capitellatum George K. Helmkamp, E. A. Helmkamp 1998-8-10 4274 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR176458  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2006-7-31 11082 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy US-50 1864 Comment
  UCR206673  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2009-7-16 15193 Placer Sierra Nevada Mountains, Foresthill Road, 20.3 miles northeast of the city of Foresthill 1704 Comment
  UCR253231  Spiraea densiflora George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 20980 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam for Lower Bear River Reservoir 1784 Comment
  UCR14527  Sporobolus airoides George K. Helmkamp 1974-6-8 s.n. Inyo Owens Valley, Pleasant Valley along the Owens River, 9 mi NW of Bishop 1311 Comment
  UCR215778  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2009-7-30 15355 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR257790  Stachys ajugoides var. rigida George K. Helmkamp, Amy Barnes 2012-8-19 19672 El Dorado Northern Sierra Nevada Mountains, unnamed dirt road along Ice House Road, 0.4 mile south of Robbs Peak Road, N of Union Valley Reservoir 1756 Comment
  UCR115810  Stachys bullata George K. Helmkamp, E. A. Helmkamp 2000-6-15 5691 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR233143A  Stachys palustris subsp. pilosa George K. Helmkamp, E. A. Helmkamp 2011-9-24 18336 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road at the junction with South Creek Road, 4.0 miles north of the Wentworth Springs/Loon Lake junction 1750 Comment
  UCD99399  Stellaria media G. K. Helmkamp; Elizabeth Helmkamp 2006-4-25 10222 El Dorado Northern Sierra Nevada Foothills; E of Sacramento and just SW of Placerville. Forni road between US Hwy 50 and Diamond Springs, at Weber Creek. 488 Comment
  CDA36250  Stellaria neglecta G. K. Helmkamp, E. A. Helmkamp 2007-3-14 11633 Sacramento Sacramento Valley near the edge of Sierra Nevada foothills.; Latrobe Rd. about 5.7 miles west of Latrobe and 1.5 miles west of the El Dorado County line. Comment
  UCR238411  Stellaria pallida George K. Helmkamp, E. A. Helmkamp 2012-4-7 18726 San Joaquin San Joaquin Valley, along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden 52 Comment
  RSA666858  Stephanomeria cichoriacea George K. Helmkamp, E. A. Helmkamp 2000-9-2 5967 San Luis Obispo Profumo Canyon, 2.2 mi W of Los Osos Valley Rd. 137 Comment
  UCR146847  Stephanomeria exigua George K. Helmkamp, E. A. Helmkamp 2004-9-23 8803 Santa Barbara San Rafael Mountains., Figueroa Mountain Road, 8.5 mi NE of Los Olivos 587 Comment
  UCR242799  Stephanomeria lactucina George K. Helmkamp, E. A. Helmkamp 2010-9-1 16901 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  OBI43759  Stephanomeria pauciflora G. K. Helmkamp 1986-9-28 s.n. Inyo 0.4 mi N of Tecopa 427 Comment
  UCR184962  Stipa californica George K. Helmkamp, E. A. Helmkamp 2007-4-23 11799 Amador Foothills, Northern Sierra Nevada Mountains, junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 Comment
  UCR171620  Stipa occidentalis George K. Helmkamp, E. A. Helmkamp 2005-7-31 9745 El Dorado Northern Sierra Nevada Foothills, 20 mi WSW of Lake Tahoe; Ice House Road, N of Calif. Highway 50 and 1.5 mi south of junction with Ice House Reservoir 1637 Comment
  UCR257691  Stipa occidentalis var. californica George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19473 Sierra Northern Sierra Nevada Mountains, Little Truckee River valley along Hwy CA-89, 3.5 road miles north of the Nevada County line, 9.6 air miles SE (136 deg. ) of Sierraville 1878 Comment
  UCR256644  Stipa occidentalis var. pubescens George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20739 Nevada Northern Sierra Nevada Mountains, Pine Flat Way, just south of its junction with CA-20 1151 Comment
  UCR233022  Stipa stillmanii George K. Helmkamp, E. A. Helmkamp 2011-9-24 18324 El Dorado Northern Sierra Nevada Mountains, Loon Lake [Ice House] Road, 2.7 miles NNE of its junction with Wentworth Springs Road 1884 Comment
  UCR193336  Streptanthus tortuosus var. orbiculatus George K. Helmkamp, E. A. Helmkamp 2007-5-30 12174 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 10.7 miles east of its junction with Forest Hill Road in Foresthill 588 Comment
  CAS-BOT-BC64532  Styrax redivivus G. K. Helmkamp 2004-4-14 8439 Santa Barbara Santa Inez Mountains: Cold Spring Canyon, along stagecoach Rd. just off Hwy 154, ca. 5 mi. se. of Lake Cachuma 609 Comment
  CLARK-A1045-1301  Suaeda fruticosa George K. Helmkamp 1978-3-17 San Diego Anza-Borrego Desert State Park Tierra Blanca Mountains; Mountain Palm Springs; bottom of canyon; Sweeney Pass 7.5'Q Comment
  UCR123937  Suaeda moquinii George K. Helmkamp, E. A. Helmkamp 2001-4-27 6546 Kern San Joaquin Valley, Enos Lane Rd., 1.9 mi south of Calif. Hwy 119, NE of Taft 61 Comment
  UCR118336  Symphoricarpos mollis George K. Helmkamp, E. A. Helmkamp 2000-9-2 5974 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon, 2.2 mi west of Los Osos Valley Road 137 Comment
  SD248320  Symphyotrichum bracteolatum George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22081 El Dorado Northern Sierra Nevada Mountains: Mehrten Spring Road, 0.5 mile north of CA-88 / Carson Pass Hwy. Wet ditch. 1793 Comment
  SD260889  Symphyotrichum foliaceum var. parryi George K. Helmkamp, William Barnes 2010-9-4 16933 El Dorado Northern Sierra Nevada Mountains: Tragedy Spring Road, 0.1 mile southeast of its upper juncton with CA-88 (Tragedy Spring 7.5'Q) 2412 Comment
  UCR45193  Tamarix ramosissima George K. Helmkamp 1986-9-27 s.n. San Bernardino Mojave Desert, Along Salt Creek at the Salt Spring Hills 28 mi. north of Baker on Hwy 127 183 Comment
  UCR230727  Tellima grandiflora George K. Helmkamp, E. A. Helmkamp 2011-6-9 17548 Sierra Northern Sierra Nevada Mountains Foothills, 7.1 miles north of Camptonville along CA-49, about 2.5 miles north of the Yuba Co. line 808 Comment
  UCR134490  Tetradymia canescens George K. Helmkamp, E. A. Helmkamp 1998-8-12 4367 Inyo Sierra Nevada Mountains, Independence Creek near Seven Pines and along Onion Valley Road 1799 Comment
  UCR175637  Thalictrum fendleri var. fendleri George K. Helmkamp, E. A. Helmkamp 2006-7-12 10999 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR134432  Thalictrum fendleri var. polycarpum George K. Helmkamp, E. A. Helmkamp 2001-4-29 6559 San Luis Obispo South Coast Range, Irish Hills, Clark Valley Road, 2.8 miles south of Los Osos Valley Road, east of Los Osos 91 Comment
  UCR103323  Thysanocarpus curvipes George K. Helmkamp 1998-3-30 3054 San Bernardino Mojave Desert, E of town of Joshua Tree & south of Copper Mtn, 0.4 mi. east of the S end of Kerr Rd near Joshua Tree National Park 884 Comment
  UCR162203  Thysanocarpus laciniatus George K. Helmkamp, E. A. Helmkamp 2005-2-14 8919 A San Luis Obispo Outer South Coast Ranges, Santa Lucia Mtns. Huasna Canyon along Huasna Road; 8.5 mi east of its junction with Lopez Road 277 Comment
  UCR233334  Thysanocarpus radians George K. Helmkamp, E. A. Helmkamp 2011-3-29 17114 Calaveras Eastern San Joaquin Valley, Oak Grove, along CA-26, at the junction with Josephine Lane, c. 0.5 mile southwest of Jenny Lind Road 117 Comment
  UCR114350  Tiquilia nuttallii George K. Helmkamp, E. A. Helmkamp 1997-9-8 2266 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCD128156  Torilis arvensis G. K. Helmkamp; Elizabeth Helmkamp 2006-5-13 10452 Placer Northern Sierra Nevada. Ca. 4 air miles NE of Auburn, along an unnamed road to Lake Clementine, 1.2 miles N of Forest Hill Road. 422 Comment
  UCR160574  Torilis arvensis George K. Helmkamp, E. A. Helmkamp 2005-6-9 9585 San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 8.3 miles northeast of Huasna Townsite Road 332 Comment
  UCR234579  Torilis arvensis George K. Helmkamp, E. A. Helmkamp 2011-6-2 17435 Nevada Northern Sierra Nevada Mountains Foothills, Lake Wildwood, along Pleasant Valley Road, 1.2 miles north of its junction with CA-20 433 Comment
  UCR176056  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2006-7-12 10986 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR176534  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2006-8-14 11226 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  UCR158602  Trichostema lanatum George K. Helmkamp, E. A. Helmkamp 2005-4-16 9356 Santa Barbara Outer South Coast Ranges, Sierra Madre Mountains, 7.5 mi south of Calif. Hwy 166 on Miranda Pines Road 1155 Comment
  CAS-BOT-BC520343  Trichostema lanceolatum George K. Helmkamp; E. A. Helmkamp 2012-10-1 19948 El Dorado Eastern Sacramento Valley: SE end of El Dorado HIlls; Windfield Way just S of its jct with White Rock Rd 167 Comment
  UCD125841  Trichostema lanceolatum G. K. Helmkamp; E. A. Helmkamp 2006-10-18 11530 El Dorado Northern Sierra Nevada Mountains Foothills: Diamond Springs; village along Hwy. CA-49 south of Placerville. 540 Comment
  UCR95914  Trichostema lanceolatum George K. Helmkamp 1996-9-21 1188 San Luis Obispo Santa Margarita Lake. W end of the lake. 396 Comment
  UCR234007  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2011-7-7 17648 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  UCR235378  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2012-5-11 18960 Placer Northern Sierra Nevada Mountains Foothills, Finning Mill Road, 4.0 miles north of Forest Hill Road and at the junction with Hollow Logging Road 1140 Comment
  UCR256654  Trientalis latifolia George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20746 Nevada Northern Sierra Nevada Mountains, along Scotts Flat Road, 0.7 mile southwest of its junction with CA-20, NE of Nevada City, NW of Scotts Flat Reservoir 1091 Comment
  SD241026  Trifolium G. K. Helmkamp 2004-4-23 8524 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd., 15.0 mi NE of Los Olivos. 1341 Comment
  UCR158582  Trifolium albopurpureum var. albopurpureum George K. Helmkamp, E. A. Helmkamp 2005-4-16 9343 Santa Barbara Outer South Coast Range, Sierra Madre Mountains, 1.1 mi south of Calif. Hwy 166 on Miranda Pines Road 526 Comment
  UCR194958  Trifolium bifidum var. decipiens George K. Helmkamp, E. A. Helmkamp 2007-5-18 12031 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road near the crossing of the North Fork of the West Fork of the American River; 9.5 miles southeast of Foresthill 439 Comment
  UCR140472  Trifolium ciliolatum George K. Helmkamp 2004-4-21 8463 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCSC010664  Trifolium columbinum George K. Helmkamp, Mary Alice Barnes 2013-4-23 20402 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 1.9 miels east of its junction with CA-26 in West Point 7.5' quad. 652 Comment
  UCR242357  Trifolium cyathiferum George K. Helmkamp, E. A. Helmkamp 2010-9-1 16870 Amador Northern Sierra Nevada Mountains, along CA-88, 2.6 miles southwest of its junction with Mormon Emigrant Trail, c. 2.75 mi. NNW of Upper Bear River Reservoir 2162 Comment
  SEINET4178628 Image available Trifolium depauperatum George K. Helmkamp, E. A. Helmkamp 2011-3-19 17092 Calaveras East end San Joaquin Valley: along CA-26, 1.8 miles southwest of Valley Springs. 206 Comment
  CAS-BOT-BC227278  Trifolium dubium George K. Helmkamp; E. A. Helmkamp 2011-5-10 17233 Amador Northern Sierra Nevada Mountains Foothills: Turner Road, 0.8 miles south of its junction with Amador Creek Road, 0.95 mi. SE (119 deg. ) of Amador City 311 Comment
  SEINET3245951  Trifolium dubium G. K. Helmkamp, E. A. Helmkamp 2010-1 15928 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5') 157 Comment
  SEINET3282788 Image available Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2007-4-30 11894 El Dorado Foothills, Northern Sierra Nevada Mountains; hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCD108828  Trifolium dubium G. K. Helmkamp; Elizabeth Helmkamp 2007-4-20 11772 El Dorado Northern Sierra Nevada Mountains. Junction of Uhlenkamp Road and Pine Hill Road, N of Grass Valley Road and NW of Placerville. 401 Comment
  UCR233135B  Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2010-3-26 15776 Sacramento Sacramento Valley/lower Sierra Nevada Foothills, along CA-16 (Jackson Rd.), 0.2 mile west of the Amador County line 82 Comment
  CAS-BOT-BC226943  Trifolium hirtum George K. Helmkamp; E. A. Helmkamp 2011-4-10 17156 Placer Sacramento Valley: along Riosa Road at the east edge of the village of Sheridan 41 Comment
  RSA0035672  Trifolium hirtum George K. Helmkamp, Mary Alice Barnes 2013-4-24 20384 Amador Along CA-26 (Red Corral/West Point-Pioneer Rd.), 2.8 miles southeast of its junction with CA-88 905 Comment
  RSA748973  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2007-4-30 11881 El Dorado hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  SEINET4178522 Image available Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17607 Amador Northern Sierra Nevada Mountains: junction of CA-26 and Joyce Road, northwest of the Hwy 26 bridge over North Fork Mokelumne River, 0.78 mi. SSW of Pioneer. 762 Comment
  UCD111146  Trifolium hirtum G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10126 Placer Northern Sierra Nevada Foothills: NE edge of Sacramento metropolitan area; Sierra College Road and King Ranch Road SSE of Rocklin. 122 Comment
  UCD60412  Trifolium hirtum G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11881 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR173274  Trifolium hirtum George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10438 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along Forest Hill Road, 1.8 mi. NE of its junction with Calif. Hwy 49 at the middle fork of the American River 370 Comment
  UCR233132A  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2011-5-21 17323 Calaveras Northern Sierra Nevada Mountains Foothills, Ridge Road, 1.9 rd. miles southeast of CA-26, 1.8 air mi. southeast (130 deg. ) of Glencoe 863 Comment
  UCR237354  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2012-6-13 19195 Nevada Northern Sierra Nevada Mountains Foothills, village of Washington, Relief Hill Road, 0.4 mile north of its junction with Maybert Road & NE of the bridge over the South Yuba River 790 Comment
  UCR257598  Trifolium hirtum George K. Helmkamp, Amy Barnes 2014-3-21 22643 Placer Sacramento Valley, Sheridan, Riosa Road at the west side of its junction with old CA-65 33 Comment
  UCD111222  Trifolium hybridum G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11238 Nevada Northern Sierra Nevada Mtns.: just south of I-80 on Lake Valley Rd. 1755 Comment
  UCR176005  Trifolium hybridum George K. Helmkamp, E. A. Helmkamp 2006-7-28 11016 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  SEINET2440977  Trifolium incarnatum George K. Helmkamp, E. A. Helmkamp 2010-5-4 15945 El Dorado Sacramento Valley: just NE of Vacaville, N side of Vaca Valley Parkway, 0.1 mi W of its junction with Crescent Drive (Allendale 7.5'). 35 Comment
  UCR163013  Trifolium incarnatum George K. Helmkamp, E. A. Helmkamp 2005-4-6 9334 Santa Barbara Outer South Coast Ranges, San Miguelito road SSW of Lompoc; mile 4.2 near Lompoc Hills 229 Comment
  UCR207889  Trifolium incarnatum George K. Helmkamp, E. A. Helmkamp 2009-4-22 14572 Placer Sierra Nevada Mountains Foothills, Rucky Chuck Rd. (dirt) 1.2 miles southeast of Forest Hill Road 448 Comment
  UCR216932  Trifolium incarnatum George K. Helmkamp, E. A. Helmkamp 2010-5-4 15945 Solano Sacramento Valley, just NE of Vacaville, north side of Vaca Valley Parkway, 0.1 mile west of its junction with Crescent Drive 35 Comment
  UCR242827  Trifolium microcephalum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17578 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 2.7 road miles northwest (1.7 air miles, 312 deg. ) of West Point 802 Comment
  RSA752654  Trifolium monanthum subsp. monanthum George K. Helmkamp 2008-6-17 13679 Amador Bear River Reservoir Road, 0.1 mile south of its junction with CA-88 1991 Comment
  UCR230713  Trifolium monanthum subsp. monanthum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17829 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  CLARK-A1045-1237  Trifolium monoense George K. Helmkamp 1978-5-30 Mono Sierra Nevada near Conway Summit, along US Highway 395; Lundy 7.5'Q Comment
  UCR15555  Trifolium monoense George K. Helmkamp 1978-5-30 s.n. Mono Eastern Sierra Nevada Mtns., c. 2 mi north of Conway Summit of Hwy US-395 2134 Comment
  UCR170327  Trifolium obtusiflorum George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9879 El Dorado Northern Sierra Nevada Foothills, Silver Fork, 2.1 mi west of Kyburz along US Highway 50 1220 Comment
  UCR237371  Trifolium pratense George K. Helmkamp, E. A. Helmkamp 2012-6-13 19182 A Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 5.6 miles north of its junction with CA-20 and along Washington Creek 787 Comment
  UCR189627  Trifolium repens George K. Helmkamp, E. A. Helmkamp 2007-8-29 12842 Yuba Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 1.2 miles southwest of Camptonville 701 Comment
  UCR197277  Trifolium subterraneum George K. Helmkamp, E. A. Helmkamp 2008-4-25 13313 El Dorado Sierra Nevada Mountains Foothills, junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Georgetown 674 Comment
  UCR233134A  Trifolium subterraneum George K. Helmkamp, E. A. Helmkamp 2011-5-21 17336 Calaveras Northern Sierra Nevada Mountains Foothills, Rail Road Flat Road, 1.2 miles south of its junction with Ridge Road, 10.1 mi. ENE (83 deg. ) of Mokelumne Hill 854 Comment
  CAS-BOT-BC516754  Trifolium tomentosum George K. Helmkamp; Amy Barnes 2013-3-28 20299 Placer Eastern Sacramento Valley: NW side of jct of Riosa Rd and Andressen Rd, NE of Sheridan 36 Comment
  SEINET3889060  Trillium angustipetalum George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10535 El Dorado Northern Sierra Nevada Mountains: Along Ice House Canyon Road, 10.6 mi. S of Wentworth Springs Road (just S of the Jones fork of Silver Creek and SE of Union Valley Reservoir) (Riverton 7.5' Q).; 0 1509 Comment
  RSA755429  Triphysaria eriantha subsp. eriantha George K. Helmkamp, E. A. Helmkamp 2009-3-26 14462 San Joaquin junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  UCR233206  Triphysaria eriantha subsp. eriantha George K. Helmkamp, E. A. Helmkamp 2010-4-7 15837 San Joaquin Northeast San Joaquin Valley, along CA-88, 1.1 miles southwest of the Amador County line, 6 miles NE (33 deg. ) of Clements 79 Comment
  UCR233289  Triphysaria eriantha subsp. eriantha George K. Helmkamp, E. A. Helmkamp 2011-3-29 17101 San Joaquin San Joaquin Valley, along CA-26 at the junction with Ospital/N Wimer Road, c. 0.3 mile southwest of the Calaveras County line, 9.1 miles NE (56 deg. ) of Linden 72 Comment
  SD236429  Triphysaria pusilla G. K. Helmkamp, E. A. Helmkamp 2008-3-22 13215 Calaveras San Joaquin Valley/Sierra Nevada Mountains Foothills: 1.8 miles north of Burson via Burson Rd., at the junction of Comanche Parkway South and Pattison Way 121 Comment
  SD241200  Triphysaria versicolor subsp. faucibarbata George K. Helmkamp, E. A. Helmkamp 2010-3-26 15780 Sacramento Sacramento Valley/lower Sierra Nevada Foothills: along CA-16 (Jackson Road), 0.2 mile west of the Amador County line (Carbondale 7.5'Q) 81 Comment
  SD239514  Triteleia hyacinthina G. K. Helmkamp, E. A. Helmkamp 2012-6-13 19201 Nevada Northern Sierra Nevada Mountains Foothills: Maybert Road along South Yuba River, 0.6 mi. NE of the river bridge at Washington (Washington 7.5'Q) 796 Comment
  UCR120495  Triteleia hyacinthina George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-30 5073 Placer Northern Sierra Nevada Range, Truckee River, c. 4 mi upstream from Lake Tahoe; 1.1 mi south of Squaw Valley Road 1860 Comment
  UCR231897  Triteleia hyacinthina George K. Helmkamp, E. A. Helmkamp 2011-4-10 17153 Placer Sacramento Valley, along Riosa Road at the east edge of the village of Sheridan 41 Comment
  SD240798  Triteleia ixioides subsp. scabra George K. Helmkamp, E. A. Helmkamp 2010-4-17 15898 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, 8.3 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q) 308 Comment
  UCR188221  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 2007-5-1 11916 El Dorado Foothills, Northern Sierra Nevada Mountains, along Hwy CA-49, 6.1 miles northwest of Placerville 454 Comment
  UCR218152  Triteleia laxa George K. Helmkamp, Amy Barnes 2010-5-7 15973 Calaveras Sierra Nevada Mountains Foothills, along CA-49, 0.4 mile north of its junction with CA-12, vicinity of San Andreas 233 Comment
  SBBG128404  Triticum aestivum G. K. Helmkamp, E. A. Helmkamp 2012-3-9 18612 Yolo County Rd 16, 2.1 mi E of its jct with County Rd 102, at the area where the rd turns sharply N, ca. 4 mi NE of Woodland 17 Comment
  SD233875  Umbellularia californica G. K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10187 El Dorado Northern Sierra Nevada Foothills: El Dorado National Forest, along Volcanoville Road, 7.7 mi N of Wentworth Springs road (NE of Georgetown). 915 Comment
  UCR189450  Umbellularia californica George K. Helmkamp, E. A. Helmkamp 2007-3-31 11727 Nevada Foothills, Northern Sierra Nevada Mountains, just south of the crossing of CA-49 over the South Yuba River 390 Comment
  UCR122986  Urtica dioica subsp. gracilis George K. Helmkamp, E. A. Helmkamp 2001-6-2 6780 San Mateo San Francisco Bay Region, Purisima Creek Road, east of Half Moon Bay at Purisima Creek, 3.2 miles east of CA Hwy 1 244 Comment
  SD241204  Urtica urens George K. Helmkamp, E. A. Helmkamp 2012-4-7 18725 San Joaquin San Joaquin Valley: along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden (Valley Springs SW 7.5'Q) 52 Comment
  SD239951  Valeriana californica George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18073 Alpine Northern Sierra Nevada Mountains: south side of Bear Valley Village, along CA Hwy 4. 2168 Comment
  UCR160969  Venegasia carpesioides George K. Helmkamp 2004-5-2 8560 Santa Barbara Southern Central Coast, Santa Ynez Mountains, Canada del Refugio Rd., 5. mi N of US-101 488 Comment
  SD239505  Veratrum californicum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17884 Nevada Northern Sierra Nevada Mountains:along CA Hwy 20, 0.8 mi. east of Bowman Lake Road, 1.23 mi NE (50a^z) of Emigrant Gap and 0.35 mi N of I-80 (Blue Canyon 7.5'Q0 1541 Comment
  UCR176006  Veratrum californicum var. californicum George K. Helmkamp, E. A. Helmkamp 2006-7-28 11015 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR229552  Veratrum californicum var. californicum George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18063 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  UCR245498  Verbascum thapsus George K. Helmkamp, Amy Barnes 2013-9-24 22358 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  SD241194  Verbascum virgatum George K. Helmkamp, E. A. Helmkamp 2010-4-17 15890 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, 7.3 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q) 331 Comment
  UCR188573  Verbascum virgatum George K. Helmkamp, E. A. Helmkamp 2007-9-24 13010 Calaveras Northern foothills, Sierra Nevada Mountains, in Rich Gulch along Gwin Mine Road, 1.2 miles north of Paloma 329 Comment
  UCR232613  Verbena bonariensis George K. Helmkamp, E. A. Helmkamp 2011-10-8 18375 Glenn Northern Sacramento Valley, along CA-45, 1.2 miles north of Princeton; Sacramento River side of the levee between the highway and Packer Island 29 Comment
  UCR258192  Verbena bonariensis George K. Helmkamp, Elizabeth Helmkamp 2012-10-20 20044 Placer Sierra Nevada Mountains Foothills, North Auburn; unnamed dirt road on east side of CA-49, between Rock Creek Road and Locksley Lane 387 Comment
  HSC104161  Verbena lasiostachys var. lasiostachys G. K. Helmkamp, E. A. Helmkamp 2012-6-26 19283 Amador Northern Sierra Nevada Mountains; Panther Creek Road, 8.0 mi. S of its junction with CA-88, along Panther Creek 1345 Comment
  UCR159326  Verbena lasiostachys var. lasiostachys George K. Helmkamp, E. A. Helmkamp 2004-7-7 8743 Santa Barbara Central Coast, Termination of San Miguelito Road., 8.7 mi SW of I Street in Lompoc 244 Comment
  UCR160566  Verbena lasiostachys var. lasiostachys George K. Helmkamp, E. A. Helmkamp 2005-6-9 9596 San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 8.3 miles northeast of Huasna Townsite Road 332 Comment
  UCR240935  Verbena lasiostachys var. lasiostachys George K. Helmkamp, E. A. Helmkamp 2012-6-26 19283 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek 1345 Comment
  UCR219093  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2009-9-5 15571 Butte Sacramento Valley, Lower Honcut Road, 0.8 mile east of its junction with CA-70, 2.5 mi. WSW (261 deg. ) of Honcut, 6.6 mi. SE (116 deg. ) of Gridley 27 Comment
  UCR132121  Veronica americana George K. Helmkamp, E. A. Helmkamp 2000-6-18 5715 Mendocino North Coast, along Calif. Hwy 128, approximately 10 mi east of the coast 274 Comment
  UCR257723  Veronica americana George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19433 Sierra Northern Sierra Nevada Mountains, along Hwy CA-89, c. 8 miles north of the Nevada County line 1823 Comment
  UCR14459  Veronica catenata George K. Helmkamp 1974-6-10 s.n. Inyo Sierra Nevada Mtns., Pine Creek, NW part of county 2287 Comment
Read comments
Jul 19 2006
  SEINET11262583  Veronica peregrina subsp. xalapensis George Helmkamp, E. A. Helmkamp 2011-5-19 17313 Calaveras Sierra Nevada Foothills: Paloma Road, 3.1 miles southwest of its junction with CA-26, 4 miles NE (341/4) of Valley Springs (Valley Springs 7.5' Q.); 0 352 Comment
  SD241195  Veronica persica George K. Helmkamp, E. A. Helmkamp 2012-4-7 18727 San Joaquin San Joaquin Valley: along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden (Valley Springs SW 7.5'Q) 52 Comment
  UCR169361  Veronica persica George K. Helmkamp, E. A. Helmkamp 2005-2-12 8897 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park, 765 Mesa View Drive, along Calif. Highway 1, 0.3 mi south of Mesa View Drive SE of Oceano/Arroyo Grande 79 Comment
  UCR173743  Veronica serpyllifolia subsp. humifusa George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10691 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 10.6 miles south of Wentworth Springs Road (just south of the Jones Fork of Silver Creek) 1509 Comment
  UCR232212  Vicia americana George K. Helmkamp, E. A. Helmkamp 2011-6-7 17489 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCR256652  Vicia americana George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20744 Nevada Northern Sierra Nevada Mountains, along Scotts Flat Road, 0.7 mile southwest of its junction with CA-20, NE of Nevada City, NW of Scotts Flat Reservoir 1091 Comment
  UCD143805  Vicia americana subsp. americana G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-10 10661 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 6.1 miles north of Hwy US-50. 1653 Comment
  SEINET4560743  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2011-1 17267 Sutter Sacramento Valley: Howsley Road at CA-99/El centro Blvd., 3.3 miles west of Pleasant Grove. 30 Comment
  RSA791744  Vicia hirsuta George K. Helmkamp, E. A. Helmkamp 2012-5-5 18916 Placer Northern Sierra Nevada Mountains Foothills: Lake Clementine Road, 1.2 miles west of its junction with Foresthill Road, 0.3 air miles southest (123 degrees) of Clementine Dam on the American River. 396 Comment
  SEINET273102  Vicia hirsuta G. K. Helmkamp, E. A. Helmkamp; A. Kerchner 1997-6-26 2185 Mendocino Orth Coast: Sandy disturbed soil beside Big River .2mi E of US 1 S of Mendocino 6 Comment
  UCR15554  Vicia sativa George K. Helmkamp 1978-7-14 s.n. Del Norte North Coast, At edge of Smith River, four miles from the ocean Comment
  UCD60414  Vicia sativa subsp. nigra G. K. Helmkamp; E. A. Helmkamp 2007-3-14 11632 Sacramento Sacramento Valley near the edge of Sierra Nevada Mountains foothills: Latrobe Rd. about 5.7 miles west of Latrobe and 1.5 miles W of the El Dorado Co. line. 110 Comment
  UCR121497  Vicia sativa subsp. nigra George K. Helmkamp, E. A. Helmkamp 2000-6-19 5772 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 Comment
  UCR197389  Vicia sativa subsp. nigra George K. Helmkamp, E. A. Helmkamp 2008-3-18 13179 Calaveras Sierra Nevada Mountains Foothills, Jesus Maria Road, 0.5 mile south of CA-26, about 1.7 miles southeast of Mokelumne Hill 427 Comment
  UCR222542  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2010-4-17 15887 Placer Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 4.2 miles southwest of its junction with CA-49 near Pilot Hill 360 Comment
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Apr 25 2011
  UCR232281  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2011-3-12 17062 San Joaquin Northern San Joaquin Valley, Collier Road, 0.2 mile east of its junction with Suttenfield Road, 9.4 mi. NE (50 deg. ) of Lodi 40 Comment
  SEINET9261274  Vicia villosa George K. Helmkamp, Amy Barnes 2014-1 22695 Sacramento Sacramento Valley: along CA-104/Twin Cities Rd., 0.7 mile west of the Amador County line (Carbondale 7.5 Q 62 Comment
  UCR171622  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2005-7-11 9690 El Dorado Northern Sierra Nevada Foothills, 30 miles SW of Lake Tahoe; 1 mile east of Jenkinson Lake along Mormon Emigrant Road/County Highway 5 1220 Comment
  UCR194711  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2007-10-28 13124 Sutter Sacramento Valley, along Nicolaus Road, 0.1 mile west of the Placer County line 12 Comment
  SEINET3238896 Image available Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13141 Sutter Sutter Basin, Sutter Buttes: West Butte Road 2.3 miles northwest of its junction with CA-20, south edge of Sutter Buttes. 22 Comment
  UCR119930  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 1999-5-20 4830 Santa Barbara Central Coast, Casmalia Hills; Corralitos Canyon, southeast of Guadalupe, 3.8 mi southeast of CA Hwy 1 on Brown Road 305 Comment
  UCR187296  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2007-4-5 11746 Amador Foothills, Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City 309 Comment
  UCR231888  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2011-4-10 17147 Placer Sacramento Valley, east of Sheridan just north of the junction of North Kilaga Springs Road and Kilaga Springs Road 98 Comment
  UCR131864  Vinca major George K. Helmkamp, E. A. Helmkamp 2000-6-18 5762 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR250706  Vinca major George K. Helmkamp, Mary Alice Barnes 2013-5-10 20549 El Dorado Northern Sierra Nevada Mtns. Foothills, Volcanoville Road (end of maintained road), 5.1 miles northwest of Bear Foot Road, at site of Volcanoville 960 Comment
  UCR173790  Viola adunca George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10683 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 10.6 miles south of Wentworth Springs Road (just south of the Jones Fork of Silver Creek) 1509 Comment
  SBBG127561  Viola bakeri G. K. Helmkamp, M. J. Ganive, M. A. Barnes 2010-6-15 16298 El Dorado Mormon Emigrant Trail, just S of Iron Mtn, ca. 15 mi SE of Sly Park Rd at Jenkinson Lake 1854 Comment
  SBBG128597  Viola glabella G. K. Helmkamp, E. A. Helmkamp 2012-5-18 19022 El Dorado Capps Crossing Rd (Bonnetti Rd), 0.1 mi NW of bridge over Diamond Crk, E of Jenkinson Lake and S of US Hwy 50 1186 Comment
  UCR190596  Viola pedunculata George K. Helmkamp, E. A. Helmkamp 2005-3-30 9248 San Luis Obispo Outer South Coast Ranges, Pozo Road, 0.9 mi east of Hi Mountain Road, north side of Garcia Mountains 460 Comment
  UCD111168  Viola purpurea G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12059 Placer Northern Sierra Nevada Mountains: Humbug Canyon Road, 0.2 mile northwest of Forest Hill Road, generally southwest of Westville. 1576 Comment
  RSA0013414  Viola purpurea subsp. quercetorum George K. Helmkamp, E. A. Helmkamp 2012-5-22 19058 El Dorado Forest Service Road 31 (Peavine Ridge Road), 1.3 miles wet of its junction with Ice House Canyon Road. 1582 Comment
  UCR197385  Vitis californica George K. Helmkamp, E. A. Helmkamp 2008-4-17 13278 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCD94532  Vulpia microstachys var. pauciflora G. K. Helmkamp 2006-5-4 10295 El Dorado Northern Sierra Nevada Foothills, east end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Hwy CA-49. 543 Comment
  UCR230994  Woodsia oregana George K. Helmkamp, E. A. Helmkamp 2011-6-9 17535 Sierra Northern Sierra Nevada Mountains Foothills, 5.9 miles north of Camptonville along CA-49, about 1.2 miles northeast of the Yuba Co. line 899 Comment
  UCR184810  Wyethia helenioides George K. Helmkamp, E. A. Helmkamp 2007-5-7 11962 El Dorado Foothills, Northern Sierra Nevada Mountains, Pedro Hills Road, 0.5 mile west of its junction with Calif. Hwy 49, junction of roads 5.3 miles south of Cool 311 Comment
  CAS-BOT-BC383634  Xanthium spinosum G. K. Helmkamp; E. A. Helmkamp 2009-10-20 15692 El Dorado Sierra Nevada Mountains Foothills: Sand Ridge Road 0.9 mile east of CA-49, at the junction with Morales Ranch Road, 6.8 air mi. SSW (118 deg. ) of Diamond Springs 381 Comment
  UCR179330  Xanthium strumarium George K. Helmkamp, E. A. Helmkamp 2006-10-10 11518 Nevada Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49, 5.8 miles NNW of Nevada City 750 Comment
  UCR194972  Xanthium strumarium George K. Helmkamp, E. A. Helmkamp 2007-10-28 13109 Placer Sacramento Valley, along Nicolaus Road 5.8 miles west of Lincoln 27 Comment
  UCR257638  Xanthium strumarium George K. Helmkamp, Elizabeth Helmkamp 2012-10-13 20018 Placer Sacramento Valley, Granite Bay, Folsom Lake; Park Road 1.8 miles north of the east end of Douglas Blvd. 146 Comment
  UCR197593  Zigadenus paniculatus George K. Helmkamp, E. A. Helmkamp 2008-6-9 13649 El Dorado Northern Sierra Nevada Mountains, Cat Creek Road, 3.6 miles north of its junction with CA-88, the jct. is 4.2 miles east of Cook's Station 1753 Comment



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