Search Results — 2000 specimen records retrieved (1981 records with coordinates)
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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/consortium/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCR91816  Abronia umbellata subsp. umbellata George K. Helmkamp 1996-5-27 1102 San Luis Obispo Central Coast, Los Osos, northeast of the corner of Martingale Avenue and Buckskin Drive 61 Comment
  UCR100573  Abronia villosa George K. Helmkamp 1997-11-1 2517 Riverside Sonoran (Colorado) Desert, Bermuda Dunes, 41st St and Sparky (just east of Washington and south of I-10) 30 Comment
  UCR103570  Abronia villosa George K. Helmkamp, E. A. Helmkamp 1998-2-18 2712 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  SD224808  Acer macrophyllum G/K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2110 Mendocino State Hwy 128, 1.5 mi SE of Boonville, in Anderson Valley. 152 Comment
  RSA792599  Achillea millefolium George K. Helmkamp, William Barnes 2010-9-4 16931 El Dorado Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 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
  UCD128312  Achillea millefolium G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12741 Amador Northern Sierra Nevada Mountains: along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail. 2172 Comment
  UCR14385  Achillea millefolium George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., along Calif. Hwy 38, east of Heart Bar State Park 2287 Comment
  UCR202670  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2008-9-22 14139 Amador Northern Sierra Nevada Mountains, north side of CA-88, 0.2 mile northeast of Silver Lake 2266 Comment
  CAS-BOT-BC444030  Acmispon americanus var. americanus George K. Helmkamp; Elizabeth Helmkamp 2013-7-31 22068 El Dorado Northern Sierra Nevada Mountains: Wentworth Springs Road, 5.2 miles west of its junction with Ice House Road, c. 9 km NW (344 deg. airline) of Union Valley Reservoir. 507 Comment
  SEINET4560901  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2010-1 16855 Nevada Northern Sierra Nevada Mountains Foothills: Donner Pass Road, 0.8 mile west of its junction with Hwy. 1-80, 0.65 mi. NE (62 degrees) of Kingvale. 1921 Comment
  UCD103822  Acmispon americanus var. americanus G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11038 El Dorado Northern Sierra Nevada Mountains, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd. 2226 Comment
  UCD103826  Acmispon americanus var. americanus G. K. Helmkamp; E. A. Helmkamp 2006-10-23 11558 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
  UCD104000  Acmispon argophyllus var. fremontii G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-4 10622 El Dorado Northern Sierra Nevada foothills. Rock Creek Road at Dark Canyon, 1.4 miles east of the junction with Hwy. CA-193. 381 Comment
  SD248412  Acmispon nevadensis var. nevadensis George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22085 El Dorado Northern Sierra Nevada Mountains; Mehrten Spring Road, 0.5 mile north of CA 88/Carson Pass Highway. 1793 Comment
  SEINET1906702  Acmispon strigosus G. K. Helmkamp, E. A. Helmkamp 2005-1 9280 Santa Barbara Outer South Coast Ranges: San Rafael Mountains. 14.0 mi NE of Los Olivos along Figueroa Mountain Road. 1000 Comment
  UCR159324  Acourtia microcephala George K. Helmkamp, E. A. Helmkamp 2004-7-14 8764 Santa Barbara Outer South Coast ranges, Santa Ynez Mountains. Jaro Rd exit from Calif. Hwy 1 (S of Lompoc). 137 Comment
  RSA715292  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2005-8-9 9781 El Dorado Northern Sierra Nevada Foothills: WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR134702  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2000-6-18 5709 Mendocino North Coast, along Calif. Hwy 128, approximately 10 mi east of the coast 274 Comment
  UCR179337  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2006-8-24 11274 El Dorado Northern Sierra Nevada Mountains Foothills, Ice House Road, 2.3 miles south of Union Reservoir Road 1552 Comment
  UCR230611  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2011-7-19 17838 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  UCD112617  Adenostoma fasciculatum G. K. Helmkamp; E. A. Helmkamp 2006-6-4 10639 El Dorado Northern Sierra Nevada Foothills: Along Highway CA-193, 0.6 mile W of its junction with Rock Creek Road. 485 Comment
  UCR235610  Adiantum jordanii George K. Helmkamp, E. A. Helmkamp 2012-5-5 18917 Placer Northern Sierra Nevada Mountains Foothills, Lake Clementine Road, 1.2 miles west of its junction with Foresthill Road, 0.3 air mi. SE (123 deg. ) of Clementine Dam on the American River 396 Comment
  SD247277  Aegilops triuncialis George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20691 Calaveras Northern Sierra Nevada Moutains Foothills: Whiskey Slide Road, just east of West Murray Creek Road, c. 4.7 miles SE of Jesus Maria Road (Calaveritas 7.5'Q) 676 Comment
  SEINET273035  Aesculus californica G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3735 Santa Clara Sierra Azul: Hicks Rd at S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR157828  Aesculus californica George K. Helmkamp, E. A. Helmkamp 1998-6-29 4131 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR193507  Agastache urticifolia George K. Helmkamp, E. A. Helmkamp 2007-9-11 12946 El Dorado Northern Sierra Nevada Mountains, Forest Road between Wright's Lake and Ice House Reservoir; 1.2 miles west of its junction with Wright's Lake Road 2049 Comment
  UCR253066  Agastache urticifolia George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22088 El Dorado Northern Sierra Nevada Mountains, Mehrten Spring Road, 0.5 mile north of CA-88/Carson Pass Hwy 1793 Comment
  UCR176078  Ageratina occidentalis George K. Helmkamp, E. A. Helmkamp 2006-8-14 11250 Nevada Northern Sierra Nevada Mtns, about 0.7 mile east of Donner Pass along Donner Pass Road 2041 Comment
  UCD128584  Agoseris grandiflora G. K. Helmkamp; Elizabeth Helmkamp 2006-5-13 10449 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
  UCD128651  Agoseris retrorsa G. K. Helmkamp; Elizabeth Helmkamp 2006-5-31 10569 El Dorado Northern Sierra Neveda Foothills: Along Hwy US-50, 7.2 miles east of Ice House Canyon Road. 1162 Comment
  UCR130379  Agoseris retrorsa George K. Helmkamp, E. A. Helmkamp 1998-5-20 4022 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
  UCR217894  Agoseris retrorsa George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16116 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 4.7 rd. miles east of its junction with Perry Creek road, air 3.9 mi. ESE (98 deg. ) of Fair Play 1082 Comment
  UCR233634  Agoseris retrorsa George K. Helmkamp, E. A. Helmkamp 2011-6-9 17501 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
  SEINET3258002 Image available Agrostis George K. Helmkamp, E. A. Helmkamp 2008-8-20 14036 Placer Northern Sierra Nevada Mountains; Soda Springs Road, 1.9 miles south of its junction with Donner Pass Road and beside (completely dry) Serena Creek. 2107 Comment
  UCR107333  Agrostis George K. Helmkamp, E. A. Helmkamp 1998-5-16 3727 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 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
  SEINET3271586 Image available Agrostis capillaris George K. Helmkamp, E. A. Helmkamp 2009-7-16 15212 Placer Sierra Nevada Mountains; Forest Hill Road, 24.6 miles northeast of the city of Foresthill, near Ford Point 1698 Comment
  RSA0011965  Agrostis idahoensis George K. Helmkamp, E. A. Helmkamp 2011-9-1 18235 El Dorado Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR14578  Agrostis idahoensis George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, Owens River, Big Springs 2195 Comment
  SEINET3271588 Image available Agrostis pallens George K. Helmkamp, Amy Barnes 2009-7-8 15129 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
  SEINET13276710 Image available Agrostis scabra George K. Helmkamp, Amy Barnes 2014-1 22999 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 1.7 miles south of Crystal Basin Information Station (Riverton 7.5' Q.) 1609 Comment
  SEINET245325  Agrostis scabra G. K. Helmkamp, E. A. Helmkamp 1998-8-10 4355 Inyo Eastern High Sierra Mountains; Onion Valley, west of Independence. 2804 Comment
  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
  SEINET7249124  Agrostis stolonifera George K. Helmkamp, Elizabeth Helmkamp 2013-1 Alpine Comment
  RSA0054101  Agrostis thurberiana G. K. Helmkamp, E. A. Helmkamp 2005-9-30 9936 Placer Northern High Sierra Mountains: Hampshire Rocks Road S of the I-80 Rainbow exit (ca.2 mi E of Cisco Grove). 1805 Comment
  SD240801  Agrostis variabilis George K. Helmkamp, E. A. Helmkamp 2012-7-14 19412 Amador Northern Sierra Nevada Mountains: Tregedy Spring, near Carson Pass Hwy, along Tragedy Spring Road 0.3 mile east of its junction with CA-88 (Tragedy Spring Road 7.5'Q) 2421 Comment
  UCR178638  Ailanthus altissima George K. Helmkamp, E. A. Helmkamp 2006-9-2 11335 El Dorado Northern Sierra Nevada Mountains Foothills, Along Calif. Hwy 193, 0.3 mile south of the junction with Calif. Hwy 49 in Placerville 534 Comment
  SEINET3821626 Image available Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 2010-3-26 15774 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
  UCR107268  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 1998-5-18 3802 Santa Clara Central Coast Range, E of San Jose; Kincaid Road 1.1 mi north of Mt. Hamilton Road. ( =Calif. Hwy 130) 793 Comment
  UCR122735  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 1998-5-19 3879 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR173679  Aira caryophyllea George K. Helmkamp, Elizabeth Helmkamp 2006-5-1 10283 El Dorado Northern Sierra Nevada foothills, corner of Pleasant Valley Road and Patterson Drive; west end of Diamond Springs 537 Comment
  UCR233134B  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 2010-3-26 15774 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
  UCR241596  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 2012-5-31 19116 Calaveras Northern Sierra Nevada Mountains, Lily Gap Road, 0.9 mile northeast of its junction with Winton Road, 8.1 km NE (60 deg. ) of West Point 1133 Comment
  UCR120509  Allenrolfea occidentalis George K. Helmkamp, E. A. Helmkamp 2001-3-16 6267 Imperial Salton Sea., Almost barren saline soil at the north end of Desert Shores -61 Comment
  SEINET3092190 Image available Allionia incarnata George K. Helmkamp, E. A. Helmkamp 1996-11-14 1263 San Diego Borrego Springs, intersection of Tilting T and hwy S-3 198 Comment
  SD260854  Allium campanulatum George K. Helmkamp, Elizabeth Helmamp 2013-6-19 20920 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, north side of its junction with Mormon Emigrant Trail. 2188 Comment
  UCR141124  Allium unifolium George K. Helmkamp, E. A. Helmkamp 2002-4-19 7627 San Luis Obispo Central Coast, 3.2 mi north of Piedras Blancas Lighthouse along CA Hwy 1 15 Comment
  RSA794817  Allophyllum George K. Helmkamp, E. A. Helmkamp 2010-8-7 16736 El Dorado Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring. 2136 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
  RSA0051412  Allophyllum integrifolium George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-31 22051 El Dorado 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. 1537 Comment
  UCR206081  Allophyllum integrifolium George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13919 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50 2043 Comment
  UCR206772  Allophyllum integrifolium George K. Helmkamp, Amy Barnes 2009-7-8 15132 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
  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
  CLARK-A1045-1053  Alnus rhombifolia George K. Helmkamp 1977-9-1 IV Mono Antelope Valley along River, one mile north of Coleville; ; Coleville 7.5'Q 1676 Comment
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Sep 7 2014
  UCR39226  Alnus rhombifolia George K. Helmkamp 1985-5-6 449 San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, SE of Morongo Valley. Along Willow trail just behind managers residence. 762 Comment
  UCR87504  Alyssum alyssoides George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 25.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  SEINET3246134  Amaranthaceae G. K. Helmkamp, E. A. Helmkamp 2009-1 15678 Amador Sierra Nevada Mountains Foothills: along Hwy CA-49, 1.0 mile south of Plymouth, 1.3 mi. north of Drytown. 303 Comment
  UCD97153  Amaranthus albus G. K. Helmkamp; E. A. Helmkamp 2006-10-18 11534 El Dorado Northern Sierra Nevada Mountains Foothills: Diamond Springs; village along Hwy. CA-49 south of Placerville. 540 Comment
  UCR219121  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15548 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
  UCR253493  Amaranthus albus George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20070 San Joaquin San Joaquin Valley, Rock Creek, at East Sonora Road, 1.3 miles southeast of CA-4 50 Comment
  UCR241336  Amaranthus palmeri George K. Helmkamp, E. A. Helmkamp 2012-9-21 19894 Calaveras Eastern San Joaquin Valley, Milton/Jenny Lind Road (Co. Rd J14), 2.3 miles south of Jenny Lind Rd. junction with CA-26, south of Rancho Calaveras & east of Linden 102 Comment
  RSA789502  Amaranthus powellii George K. Helmkamp, E. Helmkamp 2011-10-15 18432 San Joaquin along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR232675  Amaranthus powellii George K. Helmkamp, E. A. Helmkamp 2011-10-15 18432 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR58450  Amaranthus powellii George K. Helmkamp 1989-10-7 s.n. Riverside San Jacinto Mtns., Edge of Lake Hemet 1400 Comment
  UCR58163  Ambrosia acanthicarpa George K. Helmkamp 1989-8-1 s.n. Mono Eastern Sierra Nevada Mountains, US Hwy 395, just south of the summit of Devil's Gate Pass 2256 Comment
  UCR104849  Ambrosia dumosa George K. Helmkamp, E. Helmkamp 1998-1-23 2562 Imperial Sonoran (Colorado) Desert, On the W side of Hwy 86, 18.8 mi. NW of Westmorland -30 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
  CDA25211  Ambrosia psilostachya G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13114 Sutter Sacramento Valley; Along Nicolaus Road at Coon Creek, 0.9 mile west of Placer County line. Comment
  UCR242020  Ambrosia psilostachya George K. Helmkamp, E. A. Helmkamp 2012-10-3 19960 Sacramento Southeast Sacramento Valley, bike trail parking area at the south side of the American River, 0.6 mile west of Gold Country Road 27 Comment
  UCR121763  Ammophila arenaria George K. Helmkamp, E. A. Helmkamp 2001-7-8 7024 Humboldt North Coast, Samoa Peninsula, 2.6 miles south of CA Hwy 255 bridge across Humboldt Bay 15 Comment
  UCR158433  Ammophila arenaria George K. Helmkamp 2004-6-15 8650 San Luis Obispo Central Coast, Sand dunes beside the Pacific Ocean WNW of Oso Flaco Lake 6 Comment
  SD144008  Amsinckia eastwoodiae G. K. Helmkamp, E. A. Helmkamp 1998-4-9 3265 Kern Foothills of the Tehachapi Mtns. E of Arvin along Ca Hwy 223. 305 Comment
  SEINET1004407  Amsinckia intermedia George K. Helmkamp 2004-1 8293 San Luis Obispo Central Coast: SE of Oceano along Halcyon Rd, 0.2 mi E of Mesa View Dr (Hwy CA-1) 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
  UCR258127  Amsinckia intermedia George K. Helmkamp, Amy Barnes 2014-3-21 22620 Sutter Sacramento Valley, 2.8 miles WSW (257 deg. ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR217835  Amsinckia menziesii var. menziesii George K. Helmkamp, Amy Barnes 2010-5-7 15964 Calaveras Sierra Nevada Mountains Foothills, along CA-49, 0.4 mile north of its junction with CA-12, vicinity of San Andreas 233 Comment
  UCR158739  Amsinckia retrorsa George K. Helmkamp, E. A. Helmkamp 2005-4-17 9369 San Luis Obispo Central Coast, Corbett Canyon, 2.3 miles north of Calif. Hwy 227 in Arroyo Grande 81 Comment
  UCR189469  Amsinckia retrorsa George K. Helmkamp, E. A. Helmkamp 2007-3-17 11658 Calaveras Eastern Sacramento Valley, Hwy CA-12 at Lime Creek road, east of Valley Springs 238 Comment
  UCR102973  Amsinckia tessellata George K. Helmkamp, E. A. Helmkamp 1998-3-16 2820 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
  SEINET3821608 Image available Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2011-1 18457 El Dorado Southeastern Sacramento Valley, 1.6 miles west of Latrobe on South Shingle Road (Folsom SE 7.5' Q) 194 Comment
  UCR132017  Anagallis arvensis George K. Helmkamp 2003-7-31 8067 San Luis Obispo Central Coast, west edge of Nipomo Hill at junction of Cienaga Rd. and Valley View Road 15 Comment
  UCR134690  Anagallis arvensis George K. Helmkamp 2003-9-19 8160 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR216919  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2010-5-4 15959 Solano Sacramento Valley, NW edge of Vacaville, Vaca Valley Road, 0.1 mile west of its junction with Orchard Valley Road 75 Comment
  UCR218197  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2010-5-31 16168 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 1.6 miles east of the village of Sutter Creek 412 Comment
  UCR176047  Anaphalis margaritacea George K. Helmkamp, E. A. Helmkamp 2006-7-28 11009 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCR256675  Anaphalis margaritacea George K. Helmkamp, Elizabeth Helmkamp 2013-9-7 22268 El Dorado Northern Sierra Nevada Mountains, east side of Mormon Emigrant Trail, 2.7 miles west of its junction with CA-88/Carson Pass Hwy 2264 Comment
  CAS-BOT-BC526862  Andropogon virginicus var. virginicus George K. Helmkamp; E. A. Helmkamp 2012-9-15 19838 El Dorado Northern Sierra Nevada Mountains Foothills: Walton Lake; along Balderson Road, 0.4 mi S of its jct with Wentworth Springs Rd 950 Comment
  SEINET3282764 Image available Andropogon virginicus var. virginicus George K. Helmkamp, E. A. Helmkamp 2009-8-24 15528 Amador Northern San Joaquin Valley; Carbondale Road, 1.2 miles south of its junction with Lambert Road. 101 Comment
  UCR193559  Andropogon virginicus var. virginicus George 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
  UCR241992  Andropogon virginicus var. virginicus George K. Helmkamp, E. A. Helmkamp 2012-9-15 19838 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
  SD197650  Angelica breweri G. K. Helmkamp, E. A. Helmkamp 2008-8-8 14009 Alpine Northern Sierra Nevada Mountains: along Blue Lake Road, 9.2 miles south of its junction with CA-88. 2512 Comment
  UCR209744  Angelica breweri George K. Helmkamp, E. A. Helmkamp 2009-8-12 15437 Placer Sierra Nevada Mountains, Forest Hill Road, 0.8 mile west of Robinson Flat, c. 27 miles NE of the city of Foresthill 2034 Comment
  UCR257855  Angelica breweri George K. Helmkamp, Amy Barnes 2012-8-12 19611 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  UCD143803  Angelica californica G. K. Helmkamp; E. A. Helmkamp 2006-7-7 10850 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz. 2049 Comment
  UCR14463  Angelica lineariloba George K. Helmkamp 1974-6-10 s.n. Inyo Sierra Nevada Mtns., Pine Creek, NW part of county 2287 Comment
  UCD128913  Antennaria corymbosa G. K. Helmkamp; E. A. Helmkamp 2007-7-7 12490 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 0.2 mile south of its junction with CA-88. 2200 Comment
  UCR160387  Anthemis arvensis George K. Helmkamp, E. A. Helmkamp 2005-6-9 9606 San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 9.6 miles NE of Huasna Townsite Road 378 Comment
  CDA36213  Anthemis cotula G. K. Helmkamp, E. A. Helmkamp 2009-5-2 14724 Yolo Western Sacramento Valley; Capay Valley; along CA Hwy 16, 1.5 miles west of Capay. Comment
  UCR197404  Anthriscus caucalis George K. Helmkamp, E. A. Helmkamp 2008-4-11 13253 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
  CLARK-A1045-410  Antirrhinum nuttallianum George K. Helmkamp 1977-5-4 San Bernardino San Bernardino Mountains west of City Creek Ranger Station; roadside cut; ; Harrison Mt. 7.5'Q 609 Comment
  UCD121244  Apocynum androsaemifolium G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12623 Nevada Northern Sierra Nevada Mtns: Bowman Lake Road, 9.9 miles north of its junction with CA-20 (Graniteville 7.5'Q). 1774 Comment
  UCR123370  Apocynum androsaemifolium George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6873 Plumas Sierra Nevada Mountains, Calif. Hwy 36, 4.3 mi SW of its junction with Calif. Hwy 89, vicinity of Lake Almanor 1463 Comment
  UCR67438  Apocynum androsaemifolium George K. Helmkamp 1990-8-2 s.n. Mono Eastern Sierra Nevada Mountains, between Mammoth and Lake Mary 2591 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
  UCR194866  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2007-5-26 12122 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of North San Juan 610 Comment
  SD233783  Arabidopsis thaliana G. K. Helmkamp, Elizabeth Helmkamp 2006-4-20 10209 El Dorado Northern Sierra Nevada Foothills: between N and Middle forks of Cosumnes River; Juction of Sand Ridge Road and Cutaway Lane, 2.1 mi SW of Somerset (Camino 7.5' Q) 665 Comment
  UCR172638  Arabidopsis thaliana George K. Helmkamp, Elizabeth Helmkamp 2006-4-20 10209 El Dorado Northern Sierra Nevada Foothills, Between N and Middle forks of Cosumnes River; Junction of Sand Ridge Road and Cutaway Lane, 2.1 mi SW of Somerset 665 Comment
  UCR202762  Arabis George K. Helmkamp, E. A. Helmkamp 2008-8-8 14002 Alpine Northern Sierra Nevada Mountains, along Blue Lake road, 8.5 miles south of its junction with CA-88 2497 Comment
  UCR234541  Arabis drummondii George K. Helmkamp, E. A. Helmkamp 2011-8-19 18142 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 1.4 miles north of its junction with Tamarack Road 2506 Comment
  UCR104816  Aralia californica George K. Helmkamp, E. A. Helmkamp 1997-6-23 2083 Monterey Central Coast, small side tributary off Willow Creek [Los Burros] Rd., c. 1 mi. north of Gorda & c. 1.7 mi from US Hwy 1 274 Comment
  UCR92754  Arceuthobium campylopodum George K. Helmkamp, E. A. Helmkamp 1995-11-16 5- 01 Riverside San Jacinto Mtns, W end of Garner Valley, 0.5 mi east of Calif. 74 on Apple Canyon Rd. (just NE of Lake Hemet) 1341 Comment
  UCR176965  Arctostaphylos glauca George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10323 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  UCR173800  Arctostaphylos mewukka subsp. mewukka George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10602 El Dorado Northern Sierra Nevada foothills, Mormon Emigrant Trail, 6.0 miles east of its junction with Sly Park Road (Jenkinson Lake) 1055 Comment
  UCR171178  Arctostaphylos viscida George K. Helmkamp, E. A. Helmkamp 2005-7-31 9760 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
  RSA714201  Arctostaphylos viscida subsp. mariposa George K. Helmkamp, E. A. Helmkamp 2006-3-17 10076 El Dorado Forni Road between Ca. Highway 50 and Diamond Springs at Weber Creek. 488 Comment
  RSA0115431  Arctostaphylos viscida subsp. viscida George K. Helmkamp, Elizabeth Helmkamp 2014-2-20 22519 Amador Sierra Nevada Mountains Foothills: along CA-124 (E. Plymouth Highway), 0.7 mile northeast of Waterman Road, 1.94 air mi. NE (35 deg ) of Hwy 104 junction at Ione. 180 Comment
  SBBG123115  Arctostaphylos viscida subsp. viscida G. K. Helmkamp with E. A. Helmkamp 2007-3-11 11616 El Dorado Darling Ridge Rd, 5.2 mi NE of jct of Traverse Crk Rd and St Hwy 49 663 Comment
  SD257252  Arctostaphylos viscida subsp. viscida George K. Helmkamp, Elizabeth Helmkamp 2014-2-20 22519 Amador Sierra Nevada Mountains Foothills; along CA-124, 0.7 mile northeast of Waterman Road, 1.94 air miles NE of Hwy 104 junction at Ione. 180 Comment
  UCD60321  Arctostaphylos viscida subsp. viscida G. K. Helmkamp; E. A. Helmkamp 2007-3-5 11596 El Dorado Northern Sierra Nevada Mountains: Granite Canyon, along Lotus Road; about 3 miles south of CA-49. 371 Comment
  CLARK-A1045-653  Aristida longiseta var. robusta George K. Helmkamp 1977-5-29 San Bernardino Cima Kelso 15'Q 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
  UCR123132  Arnica diversifolia George K. Helmkamp, E. A. Helmkamp 1998-8-13 4411 Mono Eastern Sierra Nevada Mountains, Nunatak trail beside CA Hwy 120, about 1 mi south of Yosemite National Park entrance kiosk 2973 Comment
  UCR147230  Artemisia californica George K. Helmkamp, E. A. Helmkamp 2004-8-26 8794 Santa Barbara Central Coast, Casmalia Hills, Corralitos Canyon, 4 mi west of Hwy US-1 (S of Guadalupe) along Brown Rd. 122 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
  RSA518443  Artemisia douglasiana George K. Helmkamp 1990-9-23 G- 9 Lassen N of Ravendale 1677 Comment
  SD212467  Artemisia douglasiana G. K. Helmkamp, Elizabeth Helmkamp 2005-9-9 9844 El Dorado Northern Sierra Nevada Foothills; east of Sacramento; Squaw Hollow area at junction of Hank's Exchange Road and Ranch Road, 0.9 mile south of Pleasant Valley Road. 683 Comment
  UCD129289  Artemisia douglasiana G. K. Helmkamp; E. A. Helmkamp 2007-9-26 13020 El Dorado Northern Sierra Nevada Mountains: junction of Bonetti Road and Mormon Emigrant Trail, 2.3 miles east of Jenkinson Lake. 1226 Comment
  UCR118338  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2000-9-2 5965 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon, 2.2 mi west of Los Osos Valley Road 137 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
  UCR240734  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2012-9-1 19731 Amador Northern Sierra Nevada Mountains Foothills, aong CA-88 (Carson Pass Hwy) at the east end of Jackson; 0.2 mile east of the junction with CA-49 366 Comment
  SEINET270120  Artemisia ludoviciana subsp. albula G. Helmkamp 1993-9-22 34 -11 San Bernardino 6.7 miles up Burns Canyon from the junction of Pioneer Town and Pipes Canyon roads 1524 Comment
  UCR257787  Artemisia ludoviciana subsp. incompta George K. Helmkamp, Amy Barnes 2012-8-12 19628 Alpine Northern Sierra Nevada Mountains, along CA-89/Carson Pass Hwy in West Carson Canyon, 1.4 miles east of the junction with CA-88 2034 Comment
  UCR15469  Artemisia norvegica George K. Helmkamp 1977-8-5 s.n. Tuolumne Sierra Nevada Mountains, Porcupine Flat Campground 2591 Comment
  UCR248672  Artemisia tridentata subsp. vaseyana George K. Helmkamp, Belinda Pesheck 2013-7-14 21040 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
  UCD121334  Asclepias fascicularis G. K. Helmkamp; E. A. Helmkamp 2007-9-24 13011 Calaveras Northern Sierra Nevada Mountains: in Rich Gulch along Gwin Mine Road, 2.6 miles north of Paloma and directly above the Mokelumne River. 194 Comment
  UCR194899  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2007-5-26 12139 Yuba Northern Sierra Nevada Mountains Foothills, along CA-49, just north of the Nevada Co. line; beside Oregon Creek and Oregon Creek campground 430 Comment
  UCR219262  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2009-9-5 15591 Butte Sacramento Valley, Palermo Road 0.3 mi. east of its junction with CA-70, 6.1 mi. ENE (76 deg. ) of Biggs 58 Comment
  UCR230742  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2010-10-1 16993 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
  UCR275058  Aster breweri George K. Helmkamp 2000-7-17 5824 Mono Sierra Nevada Mountains, South Twin Lake along Lake Mary Road, 3 miles SW of Mammoth Lakes 2561 Comment
  UCR140996  Aster chilensis George K. Helmkamp 2004-3-5 8332 San Luis Obispo Central Coast, 1.0 mi (direct line) south of Oceano airport 15 Comment
  UCR242836  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, c. 2.75 mi. NNW of Upper Bear River Reservoir 2162 Comment
  UCR242818  Aster integrifolius George K. Helmkamp, E. A. Helmkamp 2010-9-1 16882 A 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
  UCR252794  Aster integrifolius George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22099 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 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
  UCR201515  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2008-8-20 14021 Placer Northern Sierra Nevada Mountains, Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR257204  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth Helmkamp 2013-9-7 22277 A Amador Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.17 mi. above junction with Hwy 88/Carson Pass Rd., at the entrance path to the spring 2425 Comment
  UCR257726  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19430 Sierra Northern Sierra Nevada Mountains, along Hwy CA-89, c. 8 miles north of the Nevada County line 1823 Comment
  UCR258417  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-8-11 22989 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCR258972  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-9-16 23089 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
  UCR170422  Aster occidentalis var. yosemitanus George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10015 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
  UCR178728  Aster oregonensis George K. Helmkamp, E. A. Helmkamp 2006-9-2 11332 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Volcanoville Road and Wentworth Springs Road about 7 miles east of Georgetown 925 Comment
  RSA614898  Astragalus aridus George K. Helmkamp 1998-3-4 3107 San Bernardino S edge of Cadiz Cry alke, 13.1 miles N. of mile-marker 76 on CA hwy 62, E of Twentynine Palms. 183 Comment
  UCR237447  Astragalus bolanderi George K. Helmkamp, E. A. Helmkamp 2012-7-14 19419 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
  RSA667359  Astragalus didymocarpus var. didymocarpus George K. Helmkamp, E. A. Helmkamp 2001-4-27 6501 Kern Tehachapi Mtns: Hart Flat turnoff from CA-58. 884 Comment
  UCR157778  Astragalus douglasii var. douglasii George K. Helmkamp, E. A. Helmkamp 1998-6-29 4180 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  CLARK-A1045-12  Astragalus layneae George K. Helmkamp 1977-4-21 San Bernardino Adelanto east of US Highway 395, 2 miles north of Adelanto; Creosote Bush scrub; ; Adelanto 7.5'Q 883 Comment
  UCR26764  Astragalus lentiginosus var. variabilis George K. Helmkamp 1982-5-23 s.n. San Bernardino San Bernardino Mtns/ Mojave Desert, burn area where Pipes Canyon Road meets Pioneertown Road 1311 Comment
  CLARK-A1045-240  Astragalus leucolobus George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains roadside; turnoff from State Highway 38 to Heart Bar State Park; ; Moonridge 7.5'Q 1828 Comment
  UCR15381  Astragalus mohavensis George K. Helmkamp 1977-4-24 s.n. Inyo Northern Mojave Desert, Salt Wells area, south of Trona 762 Comment
  UCR59988  Astragalus monoensis George K. Helmkamp 1988-9-7 s.n. Mono Eastern Sierra Nevada Mountains, Hwy 395, 29 miles north of Inyo Co. line 2195 Comment
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Oct 19 2013
  CLARK-A1045-88  Astragalus pachypus var. jaegeri George K. Helmkamp 1978-4-27 Riverside San Jacinto Mountains junction of Bee Canyon Road and San Jacinto Ridge Road; Lake Fulmor 7.5'Q Comment
  CLARK-A1045-442  Astragalus purshii var. lectulus George K. Helmkamp 1979-6-5 #4 San Bernardino San Bernardino Mountains 1.5 miles east of Fawnskin; dry slope under pines; ; Fawnskin 7.5'Q 2133 Comment
  UCD105460  Astragalus trichopodus var. phoxus G. K. Helmkamp; E. A. Helmkamp 2001-4-27 6548 Kern West end Central CA Valley: Como Rd., 1.9 mi SE of CA-58 (NW of Taft). 671 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
  CHSC118009  Asyneuma prenanthoides G. K Helmkamp; E. A Helmkamp 2008-9-15 14114 Placer Northern Sierra Nevada Mountains: along Foresthill Road 20 miles northeast of the city of Forest Hill. 1707 Comment
  UCD114234  Athysanus pusillus G. K. Helmkamp; E. A. Helmkamp 2007-3-10 11602 El Dorado Northern Sierra Nevada Mountains: Rattlesnake Bar Rd., 3.0 miles southwest of CA-49, SW of Pilot Hill. 390 Comment
  UCR30074  Atrichoseris platyphylla George K. Helmkamp 1983-4-5 483- 42 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  UCR253814  Atriplex micrantha George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20101 Placer Sacramento Valley, South Dowd Road, 0.1 mile south of its junction with Moore Road, southwest of Lincoln 34 Comment
  UCR78039  Atriplex prostrata George K. Helmkamp 1993-10-7 39- 06 Inyo Owens Valley, Pleasant Valley, edge of Owens River 1254 Comment
  HSC80086  Atriplex rosea G. K. Helmkamp 1985-9-8 701 San Bernardino Big Morongo Preserve, S of Morongo Valley, along the Desert Wash Trail. 777 Comment
  RSA518558  Atriplex rosea George K. Helmkamp 1990-9-23 H- 7 Lassen N of Ravendale 1677 Comment
  IRVC29532  Atriplex semibaccata G. K. Helmkamp, Elizabeth Helmkamp 1999-11-10 5328 A San Luis Obispo Morro Bay State Park at the south end of the marina. Central Coast 6 Comment
  UCR122190  Atriplex suberecta George K. Helmkamp, E. A. Helmkamp 2002-4-23 7563 Fresno Central Valley; San Joaquin Valley, along CA Hwy 180, 10.8 mi west of CA Hwy 145 107 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
  UCR161695  Avena fatua George K. Helmkamp, E. A. Helmkamp 2005-3-8 9055 San Luis Obispo Coastal Hills, Prefumo Canyon, north side of Irish Hills; 2.2 mi west of Los Osos Valley Road 122 Comment
  UCR249968  Avena fatua George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20212 Calaveras Eastern San Joaquin Valley, Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  UCR198540  Avena sativa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13133 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR242843  Avena sativa George K. Helmkamp, E. A. Helmkamp 2010-4-14 15867 Solano Northern San Joaquin Valley, Pitt School Road, 3.8 miles south of its junction with I-80 and south of Dixon 21 Comment
  UCR133223  Baccharis brachyphylla George K. Helmkamp 1993-9-18 29- 19 San Bernardino Mojave Desert, Morongo Valley, canyon at W end of Palo Verde Road, l mi west of Juniper Ave, between Big Morongo Canyon and Dry Morongo Canyon 1070 Comment
  UCR134440  Baccharis glutinosa George K. Helmkamp 2003-8-18 8088 San Luis Obispo Central Coast, Oceano; south side of Oceano Airport along an unnamed road 6 Comment
  UCR58154  Baccharis glutinosa 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
  SEINET4560811  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2010-1 17031 Placer Northern Sierra Nevada Mountains Foothills: Sugar Pine Road at the southwest corner of Sugar Pine Reservoir near the dam 1128 Comment
  UCR231877  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2010-10-6 17014 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26 (Stephen P. Teale Hwy) at the crossing of North Fork Mokelumne River 802 Comment
  UCR161689  Baccharis salicifolia George K. Helmkamp, E. A. Helmkamp 2005-2-24 8962 San Luis Obispo South Coast Ranges, along Huasna Road, c. 5 mi. NE of its junction with Huasna Towship Road (generally east of Arroyo Grande) 244 Comment
  HSC80082  Baccharis sergiloides G. K. Helmkamp 1985-8-28 675 San Bernardino Big Morongo Preserve, S of Morongo Valley, 1 mile downstream from Kiosk 716 Comment
  UCR37615  Baccharis sergiloides George K. Helmkamp 1984-5-2 D- 2 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 Comment
  HSC79210  Bahiopsis parishii G. K. Helmkamp 1983-10-6 - 35 San Bernardino Big Morongo Preserve of TNC, S of town on Morongo Valley in Big Morongo Canyon; Little San Bernardino Mtns. 762 Comment
  UCR26749  Balsamorhiza deltoidea George K. Helmkamp 1982-5-13 s.n. Ventura SE end of Lockwood Valley along Lockwood Valley Rd 1529 Comment
  CAS-BOT-BC438832  Barbarea orthoceras George K. Helmkamp; Mary Alice Barnes 2013-5-3 20485 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 4.7 miles south of Forest Hill Road, 1.8 mi. east (92 deg. ) of Foresthill. 829 Comment
  UCR91940  Barbarea orthoceras George K. Helmkamp 1996-6-11 1132 San Bernardino San Bernardino Mtns., 1.2 miles SW of Tulip Lane, city of Big Bear Lake 2143 Comment
  RSA489401  Bebbia juncea George K. Helmkamp 1988-2-28 s.n. Imperial Sandy flat just N of Signal Mtn., S of Hwy 98. 31 Comment
  CLARK-A1045-1357  Bellardia trixago George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay grassy field beside Turri Road, inland about 3 miles from Morro Bay; Morro Bay S 7.5'Q Comment
  UCR218950  Bidens frondosa George K. Helmkamp, E. A. Helmkamp 2009-8-30 15557 A 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
  UCR258190  Bidens frondosa George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20024 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
  UCR189446  Blennosperma nanum var. nanum George K. Helmkamp, E. A. Helmkamp 2007-3-17 11637 Amador Sacramento Valley/ Sierra Nevada Foothills, along CA-49, 0.3 mile south of Plymouth 335 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
  UCR100355  Bouteloua barbata var. barbata George K. Helmkamp 1997-9-30 2488 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR44838  Bouteloua barbata var. barbata George K. Helmkamp 1986-10-18 s.n. San Bernardino Sonoran (Colorado) Desert, along State Hwy 62, 3.4 mi west of Earp 152 Comment
  UCR103970  Boykinia occidentalis George K. Helmkamp, E. A. Helmkamp 1997-6-23 2086 Monterey Central Coast, small side tributary off Willow Creek [Los Burros] Rd., c. 1 mi. north of Gorda & c. 1.7 mi from US Hwy 1 274 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
  UCR242001  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2012-9-7 19770 Amador Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of the junction with Fiddletown Road at Plymouth 299 Comment
  RSA0107420  Brassica kaber George K. Helmkamp, Mary Alice Barnes 2013-5-8 20523 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. 13 Comment
  UCR253504  Brassica kaber George K. Helmkamp 2014-3-11 22540 Nevada Sierra Nevada Mountains Foothills, Auburn, southbound on CA-49 about 0.1 mile east of Lincoln Way 402 Comment
  UCR257136  Brassica kaber George K. Helmkamp, Amy Barnes 2014-3-21 22611 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  SEINET4560755  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2011-1 17070 San Joaquin Upper San Joaquin Valley: between Lodi and Galt, Forest Lake Road just west of CA-99. 27 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
  UCR198554  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2008-3-6 13136 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 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
  UCR253618  Brassica rapa George K. Helmkamp, Elizabeth Helmkamp 2012-11-12 20124 El Dorado East end of Sacramento Valley, El Dorado Hills; 100 yards east of Golden Foothill Parkway on Cypress Point Ct. (cul-de-sac), 0.7 mile south of Windfield Parkway 159 Comment
  UCR114246  Brickellia californica George K. Helmkamp 1997-7-29 2246 San Diego South Coast, San Onofre State Beach 30 Comment
  UCR231884  Brickellia californica George K. Helmkamp, E. A. Helmkamp 2010-10-16 17015 Placer Northern Sierra Nevada Mountains Foothills, Old Foresthill Road (between CA-49 and new Foresthill Rd), 1.8 miles northeast of junction with CA-49 250 Comment
  CLARK-A1045-839  Brickellia desertorum George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  CLARK-A1045-627  Brickellia incana George K. Helmkamp 1977-5-30 San Bernardino Mojave Desert Kelso 15'Q Comment
  UCR218634  Briza maxima George K. Helmkamp, E. A. Helmkamp 2010-6-4 16204 Sonoma North Coast Ranges, Mark West Springs Road, 1.7 rd. miles east of US-101, 2.5 air miles NE (75 deg. ) of Fulton 63 Comment
  UCR258214  Briza minor George K. Helmkamp, Amy Barnes 2013-3-28 20264 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  UCR232226  Brodiaea californica var. californica George K. Helmkamp, E. A. Helmkamp 2011-5-6 17211 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
  UCR173989  Brodiaea elegans George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10796 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, at crossing of the South Fork of the Mokelumne River 753 Comment
  UCR206110  Brodiaea elegans subsp. elegans George K. Helmkamp, E. A. Helmkamp 2009-6-3 14897 El Dorado Northern Sierra Nevada Mountains, Forbay Road, 4.7 miles northwest of its junction with Pony Express Trail in Pollock Pines 945 Comment
  UCR206279  Brodiaea elegans subsp. elegans George K. Helmkamp, E. A. Helmkamp 2009-6-2 14873 El Dorado Sierra Nevada Mountains Foothills, along Pleasant Valley Road (CA-49), 0.1 mile west of its junction with Missouri Valley Road 534 Comment
  UCR232287  Bromus George K. Helmkamp, E. A. Helmkamp 2010-8-3 16684 Calaveras Northern Sierra Nevada Mountains, along CA-4 at the Arnold Byway, about 0.3 mile northeast of Arnold 1244 Comment
  UCR242630  Bromus arenarius George K. Helmkamp, E. A. Helmkamp 2010-4-7 15821 San Joaquin Northeast San Joaquin Valley, junction of CA-88 and CA-12, about 6 miles NE of Lockeford, 1.2 mi. NE of Clements 40 Comment
  UCR249871  Bromus carinatus var. carinatus George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20907 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the junction with Pilliken Road 1825 Comment
  UCR131916  Bromus diandrus George K. Helmkamp 2003-11-22 8222 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
  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
  UCR140491  Bromus hordeaceus George K. Helmkamp 2004-4-21 8475 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 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
  UCR235434  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2012-4-17 18784 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
  UCR246651  Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2012-6-6 19127 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.1 miles west of Cooks Station 1439 Comment
  UCR253546  Bromus hordeaceus George K. Helmkamp 2014-4-5 22669 Amador Sierra Nevada Foothills, junction of Tonzi Road and CA-124, NE of Ione 201 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
  UCR57510  Bromus inermis 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
  UCR110939  Bromus marginatus George K. Helmkamp 1998-6-27 4118 Riverside Santa Rosa Mtns., 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), below Mountain Home Spring 1799 Comment
  UCR215974  Bromus orcuttianus George K. Helmkamp, Amy Barnes 2009-7-12 15177 Placer Sierra Nevada Mountains Foothills, along Foresthill Road, 5.7 miles northeast of the city of Foresthill 1230 Comment
  UCR124090  Bromus rubens George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5349 San Bernardino Sonoran (Colorado) Desert, Sacramento Spring. Along Calif. Hwy 95, 1.6 mi north of Interstate-40 396 Comment
  UCR253643  Bromus rubens George K. Helmkamp 2014-3-18 22576 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
  RSA792251  Bromus suksdorfii George K. Helmkamp, E. A. Helmkamp 2006-7-7 10835 El Dorado Northern Sierra Nevada Mountains.: Wright's Lake Road, 3.2 miles north of Highway US-50, northeast of Kyburz 1982 Comment
  CHSC100674  Cakile maritima G. K. Helmkamp 2004-3-23 8390 San Luis Obispo Central Coast: ENE of Nipomo; 1.5 mi SW of Rancho Rd along Dana Foothill Rd. 171 Comment
  UCR134382  Cakile maritima George K. Helmkamp 2003-9-26 8170 San Luis Obispo Central Coast, SW edge of Oceano; border of sand dune recreation area 6 Comment
  RSA710127  Cakile maritima var. maritima George K. Helmkamp 2004-3-23 8390 San Luis Obispo Central Coast: ENE of Nipomo, 1.5 miles SW of Rancho Road along Dana Foothill road. 171 Comment
  CLARK-A1045-129  Calandrinia ambigua George K. Helmkamp 1977-3-20 Riverside Deep Canyon dry wash of Deep Canyon; Palm Desert 15'Q Comment
  SEINET4560896  Calandrinia ciliata George K. Helmkamp, E. A. Helmkamp 2012-1 18600 Amador Northern Sierra Nevada Mountains Foothills: along CA-124 (E Plymouth Hwy), 1.2 miles northeast of Ione. 169 Comment
  UCR189480  Calandrinia ciliata George K. Helmkamp, E. A. Helmkamp 2007-3-22 11680 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
  UCR206697  Calandrinia ciliata George K. Helmkamp, E. A. Helmkamp 2009-3-19 14429 El Dorado Sierra Nevada Mtns. Foothills, Rock Creek Road at the Rock Creek crossing; about 3.5 miles west of Finnon Reservoir 412 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
  UCR121570  Calochortus albus George K. Helmkamp, E. A. Helmkamp 1999-6-28 5000 San Mateo Pescadero Creek Watershed, Bean Hollow Road 0.3 mi south of Pescadero Road (SW of Pescadero). Slopes above Butano Creek 61 Comment
  UCR207896  Calochortus albus George K. Helmkamp, E. A. Helmkamp 2009-5-14 14687 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCR253531  Calochortus albus George K. Helmkamp, Amy Barnes 2014-4-23 22795 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
  UCR218647  Calochortus amabilis George K. Helmkamp, E. A. Helmkamp 2010-6-4 16212 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
  SEINET3884909  Calochortus catalinae George K. Helmkamp 2004-4-23 8540 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd 0.8 mi E. of Midland School, ca 7 mi NE of Los Olivos (Los Olivos 7.5' Q.).; 0 396 Comment
  SD243045  Calochortus leichtlinii George K. Helmkamp, E. A. Helmkamp 2010-7-28 16672 Placer Northern Sierra Nevada Mountains: Soda Springs Road, 0.3 mile north of its junction with Forest Hill Road at Robinson Flat. 2024 Comment
  UCR129558  Calochortus leichtlinii George K. Helmkamp, E. A. Helmkamp 2001-7-8 6812 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCD139557  Calochortus monophyllus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10337 Amador Northern Sierra Nevada. Grass Valley Creek, 1.2 miles east of Pine Grove along Hwy. CA-88. 762 Comment
  UCR198430  Calochortus monophyllus George K. Helmkamp, E. A. Helmkamp 2008-4-30 13366 El Dorado Sierra Nevada Mountains Foothills, Bear Creek Road and Daffodil Road, 0.6 mile northeast of the junction of Bear Creek and Meadow Brook Road, south of Georgetown 723 Comment
  UCR130220  Calochortus palmeri var. palmeri George K. Helmkamp, E. A. Helmkamp 1998-6-27 4083 Riverside Santa Rosa Mountains., Santa Rosa Mountain Road, 3.3 mi south of Calif. Hwy 74 1601 Comment
  UCR250892  Calochortus superbus George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20675 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
  UCD95574  Caltha leptosepala G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-19 10749 El Dorado Northern Sierra Nevada Mountains: 8 miles east of Ice House Road on the road to Wright's Lake. 1999 Comment
  RSA755746  Calycadenia ciliosa George K. Helmkamp, E. A. Helmkamp 2009-6-13 15000 Shasta Wilson Hill Road, 2.4 miles south of its junction with CA-44 in Shingletown 857 Comment
  UCR242554  Calycadenia oppositifolia George K. Helmkamp, E. A. Helmkamp 2011-6-2 17426 Nevada Northern Sierra Nevada Mountains Foothills, Along CA-20, 1.5 miles west of its junction with CA-49 in Grass Valley 727 Comment
  SEINET3245939  Calyptridium monospermum G. K. Helmkamp, E. A. Helmkamp 2010-1 16519 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
  UCD100363  Calyptridium monospermum G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-19 10727 El Dorado Northern Sierra Nevada Mountains; 0.8 mile east of Ice House Road on the road to Wright's Lake. 1672 Comment
  UCR190676  Calyptridium monospermum George K. Helmkamp 2007-6-29 12426 Amador Northern Sierra Nevada Mountains, Sandy Cove picnic area southeast of CA-88 beside the west edge of Silver Lake 2244 Comment
  UCR219684  Calyptridium monospermum George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16570 El Dorado Northern Sierra Nevada Mountains, southeast side of Wright's Lake, 5.8 mi. NE (34 deg. ) of Kyburz 2085 Comment
  UCR87671  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 1995-6-22 94- 4 -23 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UCR197646  Calyptridium umbellatum George K. Helmkamp, E. A. Helmkamp 2008-6-9 13643 El Dorado Northern Sierra Nevada Mountains, Cat Creek Road, 0.1 mile north of its junction with CA-88, jct. is 4.2 miles east of Cook's Station 1662 Comment
  UCR161244  Calystegia macrostegia subsp. cyclostegia George K. Helmkamp, E. A. Helmkamp 2005-1-1 8878 Santa Barbara Central Coast, N side Casmalia Hills, Corallitos Canyon along Brown Road, 3.5 mi west of Calif. highway 1. 146 Comment
  UCR101785  Calystegia macrostegia subsp. intermedia George K. Helmkamp, E. A. Helmkamp 1997-3-5 1327 Riverside 2.8 mi SE of Gilman Hot Springs 518 Comment
  UCR131356  Calystegia macrostegia subsp. intermedia George K. Helmkamp, E. A. Helmkamp 1999-5-20 4819 a Santa Barbara Central Coast, Casmalia Hills; Corralitos Canyon, southeast of Guadalupe, 3.8 mi southeast of CA Hwy 1 on Brown Road 305 Comment
  UCR161697  Calystegia macrostegia subsp. tenuifolia George K. Helmkamp, E. A. Helmkamp 2005-3-8 9058 San Luis Obispo Central Coast Hills, Prefumo Canyon, north side of Irish Hills; 3.0 mi west of Los Osos Valley Road 140 Comment
  UCR61741  Calystegia subacaulis George K. Helmkamp 1989-4-17 s.n. San Luis Obispo Irish Hills, at the crest of Prefumo Canyon Road 366 Comment
  UCR122819  Camissonia boothii George K. Helmkamp, E. A. Helmkamp 2001-3-31 6330 San Bernardino Eastern Mojave Desert, Goffs Rd, 8.1 mi east of Goffs 610 Comment
  UCR15390  Camissonia boothii George K. Helmkamp 1977-4-23 s.n. Inyo Northern Mojave Desert, Panamint Mountains, south of Emigrant Pass 1220 Comment
  RSA613883  Camissonia boothii subsp. decorticans George K. Helmkamp, E. A. Helmkamp 1998-4-7 3191 Kern SW of Maricopa, 1.7 miles NW of CA highway 33 on Elkhorn Grade Rd. 396 Comment
  UCR100789  Camissonia boothii subsp. decorticans George K. Helmkamp, E. A. Helmkamp 1998-4-8 3191 Kern SW of Maricopa 1.7 mi NW of Calif. hwy 33 on Elkhorn Grade Rd. 396 Comment
  UCR24996  Camissonia boothii subsp. rutila George K. Helmkamp 1979-7-7 s.n. Ventura S of Mt. Pinos, along the road from 'Halfway' to Frazier Park. 1609 Comment
  UCR101659  Camissonia brevipes George K. Helmkamp, E. A. Helmkamp 1998-2-26 2775 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
  UCR124086  Camissonia brevipes subsp. brevipes George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5361 San Bernardino Colorado River, Beside the California-Arizona border near Topock, AZ. 152 Comment
  UCR14585  Camissonia campestris George K. Helmkamp 1974-6-2 s.n. Los Angeles San Gabriel Mtns., Calif. Hwy 2, 2 miles SW of Calif. Hwy 138, beside Sheep Creek 1524 Comment
  SEINET235063  Camissonia campestris subsp. campestris G. K. Helmkamp, E. A. Helmkamp 1998-5-13 3553 Kern Greenhorn Mtns. Southern Sierra Nevada: 6.5 mi. SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near H 396 Comment
  UCR122509  Camissonia campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 2001-5-2 6622 San Luis Obispo La Panza Range, Calif. Hwy 58, 11.2 miles east of Santa Margarita 488 Comment
  UCR132015  Camissonia cheiranthifolia George K. Helmkamp 2003-7-31 8064 San Luis Obispo Central Coast, west edge of Nipomo Hill at junction of Cienaga Rd. and Valley View Road 15 Comment
  UCR158180  Camissonia cheiranthifolia subsp. suffruticosa George K. Helmkamp 2004-6-15 8649 San Luis Obispo Central Coast, Sand dunes beside the Pacific Ocean WNW of Oso Flaco Lake 6 Comment
  HSC86970  Camissonia claviformis G. K. Helmkamp 1988-2-28 Imperial N of Signal Mtn. and S of Hwy. 98 31 Comment
  UCR118316  Camissonia claviformis subsp. claviformis George K. Helmkamp, E. A. Helmkamp 1998-4-19 3355 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  UCR103568  Camissonia refracta George K. Helmkamp, E. A. Helmkamp 1998-2-18 2739 Riverside Chuckwalla Mtns, Graham Pass Rd, 10.6 mi. SSW of Chuckwalla Valley Rd. 488 Comment
  RSA709064  Camissonia strigulosa George K. Helmkamp, E. A. Helmkamp 2005-4-17 9365 San Luis Obispo Central Coast: Corbett canyon, 2.3 miles N of Hwy CA-227 in Arroyo Grande. 81 Comment
  SEINET238561  Camissonia strigulosa George K. Helmkamp 1998-6-27 4103 Riverside Santa Rosa Mtns.: 3.3 mi S of Hwy 74 along Santa Rosa Mtn Rd. in vicinity of an unamed spring. 1585 Comment
  UCR129533  Camissonia strigulosa George K. Helmkamp, E. A. Helmkamp 1998-5-21 4041 Los Angeles Western Mojave Desert/Transverse Range, junction of Munz Ranch Rd and Lake Elizabeth Rd., north of Lake Elizabeth 1006 Comment
  UCR160923  Camissonia strigulosa George K. Helmkamp, E. A. Helmkamp 2001-5-2 6614 San Luis Obispo South Coast Range, La Panza Range, Calf Canyon, CA Hwy 58, 4.5 mi east of Santa Margarita 335 Comment
  UCR242567  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2010-3-26 15792 El Dorado Sierra Nevada Mountains Foothills, junction of Morales Ranch Road and Sand Ridge Road, 1.2 miles east of Hwy CA-49, south of Placerville 396 Comment
  CAS-BOT-BC37654  Cardamine californica G. K. Helmkamp 1997-3-8 1450 San Luis Obispo Southeast of Los Osos. Swift Ranch, starting ca. 2 miles south of Los Osos Valley Road on Clark Valley Road. 107 Comment
  UCR115771  Cardamine californica George K. Helmkamp 1993-3-5 s.n. San Luis Obispo Central Coast, Cuesta Ridge northwest of US-101 and the city of San Luis Obispo 671 Comment
  RSA747036  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2007-2-24 11589 El Dorado Lake Oaks Mobile Home Park, Pleasant Valley Road and Patterson Dr., east end of Diamond Springs 537 Comment
  UCR159225  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2004-7-12 8754 San Luis Obispo Central Coast, Nipomo Mesa. Mesa Dunes Mobile Home Park along Mesa View Dr. 0.2 mi south of Jct with Halcyon Rd. (SE of Oceano) 76 Comment
  UCR170984  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2006-1-16 10050 El Dorado Northern Sierra Nevada Foothills, Corner of Pleasant Valley Road and Patterson Drive, at the W end of Diamond Springs 537 Comment
  UCR173606  Cardamine hirsuta George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10169 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
  UCR198481  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2008-2-28 13131 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  UCR141109  Cardamine oligosperma George K. Helmkamp, E. A. Helmkamp 2002-4-23 7577 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
  CAS-BOT-BC259177  Cardamine pensylvanica George K. Helmkamp; E. A. Helmkamp 2012-2-23 18576 Placer Eastern edge Sacramento Valley: Newcastle, along CA-193 (Newcastle Hwy), 0.1 mile southeast of its junction with Langs Hill Road, west of the junction with I-80, SW of Auburn 279 Comment
  SEINET13203108 Image available Cardamine pensylvanica George K. Helmkamp, E. A. Helmkamp 2012-1 18895 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 (Slate Mountain 7.5' Q.) 591 Comment
  UCR24792  Carex George K. Helmkamp 1981-6-20 s.n. San Luis Obispo Central Coast, Los Osos, south edge of Eto Lake 24 Comment
  UCR249568  Carex amplifolia George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20857 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 mile south of its junction with US-50 in Kyburz 1364 Comment
  UCR250440  Carex deweyana subsp. leptopoda George K. Helmkamp, Elizabeth Helmkamp 2013-5-22 20650 El Dorado Northern Sierra Nevada Mtns. Foothills, Along E-16 (Mt. Aukum Rd.) at the southwest end of Angustini Reservoir 569 Comment
  SEINET238565  Carex fracta George K. Helmkamp 1998-6-27 4123 Riverside Santa Rosa Mtns.: 9 mi SE of Hwy 74 along Santa Rosa Mtn Rd. in vicinity of Santa Rosa Spring. 2232 Comment
  UCR130708  Carex fracta George K. Helmkamp, E. A. Helmkamp 1998-6-27 4072 Riverside San Jacinto Mtns., Garner Valley, along Hwy 74 at Morris Ranch Rd. 1372 Comment
  UCR249559  Carex fracta George K. Helmkamp 2007-7-7 12462 El Dorado Northern Sierra Nevada Mountains, along CA-89, 5.4 miles northwest of Luther Pass in the Grass Lake area 2018 Comment
  UCR115839  Carex heteroneura var. heteroneura George K. Helmkamp, E. A. Helmkamp 2000-7-18 5885 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
  UCR194689  Carex heteroneura var. heteroneura George K. Helmkamp, E. A. Helmkamp 2007-5-31 12212 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
  SD260859  Carex hoodii George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18080 Alpine Northern Sierra Nevada Mountains: south side of Bear Valley Village, along CA Hwy 4 . 2168 Comment
  UCD140444  Carex hoodii G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10985 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCR171197  Carex hoodii George K. Helmkamp, E. A. Helmkamp 2005-7-31 9748 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
  UCR176217  Carex illota George K. Helmkamp, E. A. Helmkamp 2006-8-3 11113 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR173898  Carex laeviculmis George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10743 El Dorado Northern Sierra Nevada Mountains, 5.5 miles east of Ice House Road on the road to Wright's Lake 1860 Comment
  UCR51463  Carex lemmonii George K. Helmkamp 1987-6-17 s.n. Mono Eastern Sierra Nevada Mtns., Campground at canyon, W base of Glass Mountain, 5 miles east of Owens River 2256 Comment
  UCR173479  Carex luzulina George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10539 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
  SEINET3904185  Carex multicaulis George K. Helmkamp, E. A. Helmkamp 2008-6-9 13641 El Dorado Northern Sierra Nevada Mountains: Cat Creek Road, 0.1 mile north of its junction with CA-88 jct. is 4.2 miles east of Cook's Station (Peddler Hill 7.5').; 0 1662 Comment
  UCD56645  Carex multicostata G. 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
  UCR257659  Carex nebrascensis George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19451 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
  UCD140754  Carex praegracilis G. Helmkamp 1985-5-10 481 San Bernardino at entrance to Big Morongo Nature Conservancy Preserve, SE of town of Morongo Valley. 762 Comment
  UCR229586  Carex praegracilis George K. Helmkamp, E. A. Helmkamp 2011-7-30 17926 El Dorado Northern Sierra Nevada Mountains, along North-South Road, 1.6 miles north of its junction with Omo Ranch Road, 0.95 mi. NNW (331 deg. ) of Omo Ranch Rd. jct. with Hwy 88 1460 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
  SBBG87905  Carex straminiformis G. K. Helmkamp 1985-8-23 885 -38 Mono Mammoth Lakes, edge of Lake Mamie 2590 Comment
  UCR91930  Carex subfusca George K. Helmkamp 1996-6-11 1146 San Bernardino San Bernardino Mountains, Along 2N11 SW of the city of Big Bear Lake, c. 0.5 mile west of [2N10] Mill Creek Road 2256 Comment
  UCR175725  Carex vesicaria var. vesicaria George K. Helmkamp, E. A. Helmkamp 2006-7-10 10921 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
  UCR120154  Castilleja affinis George K. Helmkamp, E. A. Helmkamp 1999-5-20 4833 Santa Barbara Central Coast, Casmalia Hills; Corralitos Canyon, southeast of Guadalupe, 3.8 mi southeast of CA Hwy 1 on Brown Road 305 Comment
  UCR233420  Castilleja affinis George K. Helmkamp, E. A. Helmkamp 2011-6-9 17525 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
  UCR123428  Castilleja affinis subsp. affinis George K. Helmkamp, E. A. Helmkamp 2000-4-25 5587 Kern Tehachapi Mountains, Water Cyn Rd SW of Tehachapi and 1.0 mi south of Highline 1494 Comment
  UCR240927  Castilleja applegatei subsp. pinetorum George K. Helmkamp, E. A. Helmkamp 2012-6-26 19275 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 4.1 miles south of its junction with CA-88, S of Hwy 88/Carson Pass Hwy. and W of Lower Bear Reservoir 1518 Comment
  CAS-BOT-BC257276  Castilleja attenuata George K. Helmkamp; E. A. Helmkamp 2011-4-1 17122 Colusa Eastern Foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 1.8 miles southeast of Sites 77 Comment
  UCR257016  Castilleja attenuata George K. Helmkamp, Mary Alice Barnes 2013-5-13 20570 Amador Sierra Nevada Mountains, Fiddletown Road, c. 9 miles northeast of its junction with E-16/Shenandoah Rd. near Plymouth 665 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
  UCR130388  Castilleja exserta subsp. venusta George K. Helmkamp, E. A. Helmkamp 1998-5-21 4035 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  SD225112  Castilleja foliolosa G. K. Helmkamp 1998-4-3 3089 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
  SEINET3245842  Castilleja foliolosa G. K. Helmkamp, E. A. Helmkamp 2007-1 11715 Placer Foothills, Northern Sierra Nevada Mountains: Forest Hill Road at the junction with the unnamed road to Lake Clementine. 457 Comment
  UCD122499  Castilleja foliolosa G. K. Helmkamp; Elizabeth Helmkamp 2006-5-13 10435 Placer Northern Sierra Nevada: ca. 4 air mi. NE of Auburn, along Forest Hill Road, 1.8 mi. NE of its junction with CA Hwy 49 at the middle fork of the American River. 370 Comment
  SEINET270113 Image available Castilleja linariifolia G. Helmkamp 1993-9-22 34 -8 San Bernardino 6.7 miles up Burns Canyon from the junction of Pioneer Town and Pipes Canyon roads 1524 Comment
  UCR136205  Castilleja linariifolia George K. Helmkamp, E. A. Helmkamp 1999-9-30 5305 San Bernardino San Bernardino Mountains, 5.7 miles up Burns Cyn Rd from Rimrock Rd., NW of Pioneertown 1768 Comment
  UCR99939  Castilleja linariifolia George K. Helmkamp 1997-9-29 2433 Inyo Sierra Nevada Mountains, Onion Valley Road, 7.9 mi west of Hwy US-395 from Independence 2159 Comment
  CLARK-A1045-1119  Castilleja miniata George K. Helmkamp 1977-9-1 V Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR173901  Castilleja miniata subsp. miniata George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10766 El Dorado Northern Sierra Nevada Mountains, 2 miles west of Wright's Lake at the junction with Wright's Lake Road (6 miles north of Hwy US-50) 2003 Comment
  UCR175650  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2006-7-7 10823 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 3.2 miles north of Hwy US-50, northeast of Kyburz 1982 Comment
  UCR257864  Castilleja miniata subsp. miniata George K. Helmkamp, Amy Barnes 2012-8-12 19616 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  UCR258108  Castilleja miniata subsp. miniata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19557 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
  SD237611  Castilleja tenuis G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15075 El Dorado Sierra Nevada Mountains: Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74a^z) of Pollock Pines (Riverton 7.5'Q) 1641 Comment
  SD247504  Castilleja tenuis George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-6 19359 El Dorado Northern Sierra Nevada Mountains: Robbs Peak Road a the junction with Ice Hoise Road, 22 miles north of US-50 (Robbs Peak 7.5'Q) 2078 Comment
  SEINET2042018 Image available Caulanthus cooperi George Helmkamp, E. A. Helmkamp 2001-3-24 6309 San Bernardino South Central Mojave Desert; 0.3 mi W of CA-247 on Pipes Cyn Rd. 1037 Comment
  UCD114595  Caulanthus lasiophyllus G. Helmkamp 1987-3-24 s.n. San Bernardino SSW base of Fremont Peak, about 6.5 miles E of U.S. Highway 395. 975 Comment
  SD236393  Ceanothus cordulatus G. K. Helmkamp 2008-6-17 13670 Amador Northern Sierra Nevada Mountains: Bear River Reservoir road, 0.1 mile south of its junction with CA-88. 1990 Comment
  UCR134467  Ceanothus cordulatus George K. Helmkamp, E. A. Helmkamp 1998-8-12 4342 Inyo Sierra Nevada Mountains, Onion Valley, west of Independence, Inyo National Forest 2805 Comment
  UCR217916  Ceanothus cordulatus George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16468 El Dorado Sierra Nevada Mountains, Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  UCR242330  Ceanothus cordulatus George K. Helmkamp, E. A. Helmkamp 2010-7-28 16660 Placer Northern Sierra Nevada Mountains, Forest Hill Road, 22 miles northeast of the city of Foresthill 2041 Comment
  SD255843  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp, Elizabeth Helmkamp 2014-2-22 22530 Nevada Sierra Nevada Mountains Foothills: Garden Bar Road, 2.8 road miles west of Wolf Road at Wolf, 3.9 air miles WNW (287a^z) of Higgins Corner (Wolf 7.5'Q) 387 Comment
  UCR188843  Ceanothus cuneatus subsp. cuneatus George K. Helmkamp, E. A. Helmkamp 2007-3-25 11714 Placer Foothills, Northern Sierra Nevada Mountains, Forest Hill Road at the junction with the unnamed road to Lake Clementine 457 Comment
  UCR141940  Ceanothus gloriosus subsp. gloriosus George K. Helmkamp 2004-1-9 8238 San Luis Obispo Central Coast, Along Highway Calif. Hwy 1, 0.6 mi south of Nipomo Hill in the Arroyo Grande area 46 Comment
  UCR140107  Ceanothus impressus var. nipomensis George K. Helmkamp 2004-2-9 8265 San Luis Obispo Central Coast, Nipomo Mesa at the corner of Willow and Pomeroy Streets 61 Comment
  SEINET4691347  Ceanothus integerrimus George K. Helmkamp 2011-1 17505 Nevada Northern Sierra Nevada Mointains Foothills: Tyler Foote Crossing Road, 3.0 miles north of its junction with Grizzly Hill Road, generally north of North columbia 884 Comment
  UCD111970  Ceanothus integerrimus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-29 10269 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
  UCR173289  Ceanothus integerrimus George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10462 El Dorado Northern Sierra Nevada Foothills, S side of Peavine Ridge; along Meadow Canyon Road, 3.4 mi. west of its junction with Ice House Canyon Road (N of US Hwy 50 and SSE of Union Valley Reservoir) 1189 Comment
  UCR193196  Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2007-6-6 12259 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road 1616 Comment
  UCR130602  Ceanothus papillosus subsp. roweanus George K. Helmkamp, E. A. Helmkamp 1999-5-21 4868 Monterey Santa Lucia Mountains, Willow Creek Road, 6.3 mi east of Calif. Hwy 1 north of Gorda 1037 Comment
  UCR161660  Ceanothus thyrsiflorus George K. Helmkamp, E. A. Helmkamp 2005-5-17 9490 Monterey Central Coast, 0.9 mi south of Plaskett (N of Gorda); along Calif. Highway 1 90 Comment
  UCR161288  Centaurea iberica George K. Helmkamp, E. A. Helmkamp 2005-3-8 9075 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon Road, 4.6 mi west of Los Osos Valley Road 316 Comment
  UCR160385  Centaurea melitensis George K. Helmkamp, E. A. Helmkamp 2005-6-9 9617 A San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 9.6 miles NE of Huasna Townsite Road 378 Comment
  UCD130099  Centaurea solstitialis G. K. Helmkamp; E. A. Helmkamp 2007-9-1 12862 El Dorado Northern Sierra Nevada Mountains. Happy Valley Road, 3.2 miles E of its junction with CA-E-16 (just W of Sweeney's Crossing). 627 Comment
  UCR178759  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2006-9-20 11410 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Ice House Road [at Riverton] and US-50 east of Pacific 1000 Comment
  UCR188525  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2007-9-24 13006 Calaveras Northern foothills, Sierra Nevada Mountains, in Rich Gulch along Gwin Mine Road, 1.2 miles north of Paloma 329 Comment
  UCR257141  Centaurea solstitialis George K. Helmkamp, Mary Alice Barnes 2013-5-8 20517 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 13 Comment
  UCR161826  Centaurium davyi George K. Helmkamp, E. A. Helmkamp 2005-3-13 9116 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon, 2.0 mi. south of Calif. Highway 166 402 Comment
  RSA0093478  Centaurium muehlenbergii George K. Helmkamp, Mary Alice Barnes 2013-5-17 20628 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
  UCR123143  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2001-6-2 6795 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
  UCR132137  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2000-6-18 5703 Mendocino Outer North Coast Ranges., 18.7 mi NW of US-1 (Cloverdale) along Calif. Hwy 128 274 Comment
  UCR191118  Centaurium muehlenbergii George 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
  UCR229430  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2011-8-11 18024 El Dorado Northern Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 524 Comment
  UCR232652  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2011-9-30 18349 Nevada Northern Sierra Nevada Mountains Foothills, Dutch Flat X Road (extension of Diggins Hill Road), 3.1 miles northeast of Dutch Flat and north of the Bear River Reservoir 854 Comment
  UCR107380  Centranthus ruber George K. Helmkamp, E. A. Helmkamp 1998-5-16 3732 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR26753  Centrostegia thurberi subsp. thurberi George K. Helmkamp 1982-5-23 s.n. San Bernardino San Bernardino Mtns/ Mojave Desert, burn area where Pipes Canyon Road meets Pioneertown Road 1311 Comment
  UCR253592  Cephalanthus occidentalis var. californicus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20111 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR194874  Cerastium fontanum subsp. vulgare George K. Helmkamp, E. A. Helmkamp 2007-5-26 12120 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of North San Juan 610 Comment
  UCR184935  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
  UCR249959  Cerastium glomeratum George K. Helmkamp, Elizabeth Helmkamp 2013-4-13 20303 Nevada Northern Sierra Nevada Mountains Foothills, Magnolia Road, 3.0 miles east of its junction with CA-49 495 Comment
  SD237420  Cercis occidentalis G. K. Helmkamp, E. A. Helmkamp 2009-5-20 14729 Yolo Inner Coast Range: west side of Cache Creek along CA-16, 5.5 miles southeast of Colusa County line. 177 Comment
  UCD105647  Cercis occidentalis G. K. Helmkamp; E. A. Helmkamp 2007-3-23 11704 El Dorado Northern Sierra Nevada Mountains; Rattlesnake Bar Road, 1.4 miles west of CA-49 at Pilot Hill. 313 Comment
  UCR173650  Cercis occidentalis George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10154 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; 4.2 mi NW of Coloma along Calif. Hwy 49 247 Comment
  UCR189021  Cercis occidentalis George K. Helmkamp, E. A. Helmkamp 2007-3-23 11693 El Dorado Northern Sierra Nevada Mountains Foothills, hills bordering the east end of Sacramento Valley. Salmon Falls Road, 4.6 miles north of Green Valley Road, above NE arm of Folsom Lake 384 Comment
  UCR247241  Cercocarpus ledifolius var. intermontanus George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22182 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.1 mile east of its junction with CA-4, Monitor Creek 1747 Comment
  UCR103619  Chaenactis carphoclinia var. carphoclinia George K. Helmkamp, E. A. Helmkamp 1998-3-19 2926 Imperial Sonoran (Colorado) Desert, Imperial Dam area, just south of the dam on Hwy S-24. 76 Comment
  UCR102971  Chaenactis fremontii George K. Helmkamp, E. A. Helmkamp 1998-3-16 2823 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-A1045-762  Chaenactis macrantha George K. Helmkamp 1977-5-29 San Bernardino Mojave Desert Stuckey's; Cima Road at Interstate Highway 15; Mescal Range 15'Q Comment
  CLARK-A1045-32  Chaenactis macrantha George K. Helmkamp 1977-4-24 Inyo Panamint Mountains dry, rocky slope above canyon; 1249 Comment
  UCR122964  Chaenactis stevioides George K. Helmkamp, E. A. Helmkamp 2001-3-30 6446 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  RSA756087  Chamaebatia foliolosa George K. Helmkamp, E. A. Helmkamp 2009-5-28 14842 Sierra along CA-49, 1.6 miles north of the Yuba County line 902 Comment
  UCR233401  Chamaesaracha nana George K. Helmkamp, E. A. Helmkamp 2011-8-26 18185 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
  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
  UCD103660  Chamerion angustifolium subsp. circumvagum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11024 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
  UCR232677  Chenopodium George K. Helmkamp, E. A. Helmkamp 2011-10-15 18430 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR134425  Chenopodium album George K. Helmkamp 2003-9-19 8147 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  SD186163  Chenopodium berlandieri G. K. Helmkamp 2003-7-29 8040 B San Luis Obispo 0.6 mile south of Nipomo Hill in Arroyo Grande area. 46 Comment
  UCR200855  Chenopodium botrys George K. Helmkamp, E. A. Helmkamp 2008-9-15 14098 Placer Foothills, northern Sierra Nevada Mountains, along Mosquito Ridge Road, 3.1 miles southeast of Forest Hill 773 Comment
  UCR122167  Chenopodium californicum George K. Helmkamp, E. A. Helmkamp 2000-4-22 5482 San Luis Obispo Central Coast, Los Osos, between the west end of Howard Ave. and Morro Bay sand dunes 15 Comment
  UCR40967  Chenopodium incognitum George K. Helmkamp 1985-8-20 885- 09 Mono Owens Valley, along the Owens River, at Big Springs Campground, 7 air miles NE of Mammoth Lakes, above Arcularius Ranch 2195 Comment
  UCR161776  Chenopodium murale George K. Helmkamp, E. A. Helmkamp 2005-2-18 8937 Santa Barbara Central Coast, Solomon Hills SE of Santa Maria along Dominion Road, 1.9 mi. SE of its junction with Clark Avenue 259 Comment
  UCR120737  Chenopodium strictum George K. Helmkamp, E. A. Helmkamp 2000-9-1 5958 San Luis Obispo Los Osos, Martingale at Buckskin 30 Comment
  SBBG92381  Chloracantha spinosa G. K. Helmkamp 1989-9-16 s.n. Riverside ca. 0.5 mi S of Interstate 8, W of Blythe at Seeley Rd and St Hwy 78 75 Comment
  CAS-BOT-BC526864  Chondrilla juncea George K. Helmkamp; E. A. Helmkamp 2012-9-17 19861 El Dorado Northern Sierra Nevada Mountains Foothills: N of Pollock Pines, along Forebay Rd at South Fork American River 563 Comment
  UCR190624  Chondrilla juncea George K. Helmkamp, E. A. Helmkamp 2007-7-23 12567 El Dorado Northern Sierra Nevada Mountains Foothills, Rock Creek road, 7.1 miles east of its junction with CA-193 567 Comment
  UCR240710  Chondrilla juncea George K. Helmkamp, E. A. Helmkamp 2012-9-5 19758 El Dorado Northern Sierra Nevada Mountains Foothills, along Lotus Road, 1.6 miles south of its junction with CA-49, 1.45 mi. SW (238 deg. ) of Coloma 248 Comment
  UCR142159  Chorizanthe angustifolia George K. Helmkamp, E. A. Helmkamp 2000-6-15 5672 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR24796  Chorizanthe angustifolia var. eastwoodiae George K. Helmkamp 1981-6-20 s.n. San Luis Obispo Los Osos: just north of Martingale Avenue and Buckskin Drive 61 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
  UCR101670  Chorizanthe corrugata George K. Helmkamp, E. A. Helmkamp 1998-2-26 2773 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
  UCR15444  Chorizanthe corrugata George K. Helmkamp 1977-2-17 s.n. Imperial Sonoran (Colorado) Desert, Roadside, S-22, west of Salton City 61 Comment
  CLARK-A1045-990  Chorizanthe thurberi George K. Helmkamp 1977-6-11 B Kern Freeman Canyon Junction of State Highway 178 and 14; ; Freeman Junction 7.5'Q Comment
  UCR122972  Chrysanthemum coronarium George K. Helmkamp, E. A. Helmkamp 2001-6-2 6761 San Mateo Central Coast, Pillar Point Harbor, about 4 miles north of Half Moon Bay 6 Comment
  UCR209686  Chrysanthemum leucanthemum George K. Helmkamp, E. A. Helmkamp 2009-8-1 15356 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  CDA7413  Chrysanthemum segetum G. K. Helmkamp, E. A. Helmkamp 2000-6-18 5734 Mendocino North Coast; Glass Beach at Fort Bragg. Comment
  UCR176060  Chrysolepis sempervirens George K. Helmkamp, E. A. Helmkamp 2006-8-14 11264 El Dorado Northern Sierra Nevada Mtns, Sayles Flat at the junction of Mount Ralston Trail and US-50, c. 0.9 mile south of Twin Bridges 1960 Comment
  UCR200872  Chrysolepis sempervirens George K. Helmkamp, E. A. Helmkamp 2008-9-15 14112 Placer Northern Sierra Nevada Mountains, Forestry route 43, 0.3 mile southeast of the east end of Foresthill Road at the junction to Soda Springs, junction is 27 miles northeast of Forest Hill City 2061 Comment
  RSA615441  Chrysothamnus nauseosus subsp. bernardinus George K. Helmkamp 1997-9-29 2440 Inyo Onion Valley Rd, 7.9 mi. W of Hwy US-395 from Independence. 2159 Comment
  RSA567425  Chrysothamnus nauseosus subsp. mohavensis George K. Helmkamp 1993-9-22 35 -7 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
  UCR79517  Chrysothamnus teretifolius George K. Helmkamp 1993-9-12 23- 10 San Bernardino San Bernardino Mtns., edge of Burns Canyon 1375 Comment
  UCR99898  Chrysothamnus teretifolius George K. Helmkamp 1997-9-30 2504 Inyo Sierra Nevada Mtns., Big Pine Creek 2287 Comment
  SD227857  Chylismia claviformis subsp. claviformis G. K. Helmkamp, E. A. Helmkamp 1998-2-26 2769 San Bernardino Mojave Desert: Silurian Dry Lake along CA-127, 19.0 mi N of Baker 206 Comment
  SD143806  Chylismia claviformis subsp. peirsonii G. K. Helmkamp, E. Helmkamp 1998-1-23 2564 Imperial 18.8 miles northwest of Westmoreland. -29 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
  UCR230613  Circaea alpina subsp. pacifica George K. Helmkamp, E. A. Helmkamp 2011-7-19 17836 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  UCR249619  Circaea alpina subsp. pacifica George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20852 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 mile south of its junction with US-50 in Kyburz 1364 Comment
  UCSB71600  Cirsium andersonii Helmkamp, G.; Helmkamp, E. 2008-8-30 El Dorado Northern Sierra Nevada Mountains; Leek Spring Valley, Foster Meadow Road 0.9 miles southwest of its junction with Mormon Emigrant Trail (Tragedy Spring 7.5' Q.) 2241 Comment
  UCR161103  Cirsium occidentale var. occidentale George K. Helmkamp, E. A. Helmkamp 2005-6-12 9653 San Luis Obispo Central Coast Range, along Calif. Hwy 58 (Carrizo Hwy), 22.2 miles east of Santa Margarita; near Camatta Creek 552 Comment
  UCR189591  Cirsium vulgare George K. Helmkamp, E. A. Helmkamp 2007-9-11 12934 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50, 0.4 mile southwest of Phillips 1829 Comment
  UCR230704  Cirsium vulgare George K. Helmkamp, E. A. Helmkamp 2010-10-1 16995 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
  UCR157986  Clarkia George K. Helmkamp, E. A. Helmkamp 1998-6-29 4141 B Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR173997  Clarkia George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10802 Amador Northern Sierra Nevada foothills, northbound along Calif. Hwy 26, 0.6 mile past the North Fork of Mokelumne River 732 Comment
  RSA715280  Clarkia biloba subsp. biloba George K. Helmkamp, E. A. Helmkamp 2006-6-7 10648 El Dorado Sierra Nevada foothills: hiking trail, 3.5 miles northwest of Placerville along Highway CA-49 512 Comment
  UCR194885  Clarkia biloba subsp. brandegeeae George K. Helmkamp, E. A. Helmkamp 2007-5-26 12101 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 6.9 miles north of Nevada City at the crossing of the South Yuba River 372 Comment
  UCR222559  Clarkia concinna subsp. concinna George K. Helmkamp, E. A. Helmkamp 2010-6-5 16242 Sonoma North Coast Ranges, River Rd., 9.6 miles west of its junction with US-101, 4.25 mi. ENE (83 deg. ) of Guerneville on slope above the Russian River 12 Comment
  UCR159843  Clarkia cylindrica subsp. cylindrica George K. Helmkamp, E. A. Helmkamp 2005-6-12 9623 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR127085  Clarkia epilobioides George K. Helmkamp, E. A. Helmkamp 1998-5-19 3855 Monterey Reservoir area., San Antonio Rd 0.7 mi north of G-14 (Interlake Rd between San Antonio and Nacimiento reservoirs) 335 Comment
  RSA785397  Clarkia heterandra George K. Helmkamp, E. A. Helmkamp 2010-6-23 16346 Amador Sierra Nevada Mtns Foothills: Sutter Creek Road, 7.2 mi NE of its junction with old CA-49 in Sutter Creek village. 473 Comment
  SEINET1004405  Clarkia purpurea George K. Helmkamp 2004-1 8522 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd., 15.0 mi NE of Los Olivos. 1341 Comment
  IRVC29061  Clarkia purpurea subsp. quadrivulnera G. K. Helmkamp, E. A. Helmkamp 2000-4-24 5483 A Monterey Nacimiento Rd. 12 mi N of Gorda and 3.8 mi E of CA-1. Central outer coast ranges. 549 Comment
  UCR159376  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2005-5-12 9453 Monterey Central Coast Ranges, 4 mi west of US-101 on Calif. Hwy G18 in Hames Valley 233 Comment
  UCR234631  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2011-6-2 17449 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
  UCR219652  Clarkia purpurea subsp. viminea George K. Helmkamp, E. A. Helmkamp 2010-6-26 16414 Placer Sierra Nevada Mountains Foothills, Yankee Jims road along Brush Creek in Bunch Canyon, 2.8 miles southeast of its junction with Canyon Way, 2.75 mi. ENE (74 deg. ) of Applegate 476 Comment
  SD239825  Clarkia rhomboidea George K. Helmkamp, E. A. Helmkamp 2011-8-6 17955 Amador Northern Sierra Nevada Mountains: Ellis Road, 2.1 miles south of its junction with CA-88 (Peddler Hill 7.5'Q) 1794 Comment
  UCR159990  Clarkia rubicunda George K. Helmkamp, E. A. Helmkamp 2005-6-5 9507 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
  UCR127074  Clarkia similis George K. Helmkamp, E. A. Helmkamp 1998-5-19 3827 Monterey Salinas Valley, 3.7 mi south of Lockwood on G-14, Interlake Road near northwest end of Lake San Antonio 320 Comment
  UCR18551  Clarkia speciosa subsp. polyantha George K. Helmkamp 1974-10-18 s.n. Madera Sierra Nevada Mtns., South Fork of Willow Creek at North Fork 793 Comment
  UCR109061  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 1998-6-30 4203 San Luis Obispo South Coast Range, Alamo Creek Rd, 0.9 mile north of Calif. Hwy 166, near Twitchell Reservoir 320 Comment
  UCR159841  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2005-6-12 9625 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR160374  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2005-6-7 9538 San Luis Obispo Outer South Coast Ranges, along Huasna Road, 1.3 mile west of Huasna Townsite Road 305 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
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Jun 4 2008
  UCR253533  Claytonia parviflora subsp. grandiflora George K. Helmkamp, Amy Barnes 2014-4-23 22797 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
  UCR218145  Claytonia parviflora subsp. parviflora George K. Helmkamp, Amy Barnes 2010-5-7 15994 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  UCR170791  Claytonia perfoliata subsp. mexicana George K. Helmkamp, E. A. Helmkamp 2005-8-9 9788 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR206887  Claytonia perfoliata subsp. mexicana George K. Helmkamp, E. A. Helmkamp 2009-3-7 14356 El Dorado Northern Sierra Nevada Mtns. Foothills, along Rock Creek Road, 1.3 miles east of its junction with CA-193 427 Comment
  UCR250667  Claytonia perfoliata subsp. mexicana George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20193 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26, 5.1 miles southwest of Mokelumne Hill 393 Comment
  UCR122417  Claytonia perfoliata subsp. perfoliata George K. Helmkamp, E. A. Helmkamp 2002-4-24 7589 Madera Western Sierra Nevada foothills, Auberry Rd (Rd 200/North Fork Rd.) 5.0 mi south of North Fork 503 Comment
  UCR58159  Clematis ligusticifolia 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
  SD239908  Collinsia heterophylla G. K. Helmkamp, Amy Barnes 2010-5-7 15985 Calaveras Sierra Nevada Mountains Foothills: Michel Road, 0.1 mile east of its junction with Mountain Ranch Road. 5.2 miles east (92.5a^z) of San Andreas (Calaveritas 7.5'Q) 512 Comment
  UCD123589  Collinsia heterophylla G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11895 El Dorado Northern Sierra Nevada Mountains. Hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCD123637  Collinsia parviflora G. K. Helmkamp; E. A. Helmkamp 2006-8-3 10994 El Dorado Northern Sierra Nevada Mountains: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2103 Comment
  SD239910  Collinsia sparsiflora var. collina George K. Helmkamp, E. A. Helmkamp 2011-5-21 17342 Calaveras Northern Sierra Nevada Mountains Foothills: Railroad Flat Road at the junction with Cedar Ridge Road, 10.5 mi ENE (87a^z) of Mokelumne Hill (Rail Road Flat 7.5'Q) 846 Comment
  UCR230139  Collinsia sparsiflora var. collina George K. Helmkamp, E. A. Helmkamp 2011-5-21 17342 Calaveras Northern Sierra Nevada Mountains Foothills, Railroad Flat Road at the junction with Cedar Ridge Road, 10.5 mi. ENE (87 deg. ) of Mokelumne Hill 846 Comment
  UCR173813  Collinsia tinctoria George 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 Calif. Hwy 193 424 Comment
  UCR206826  Collinsia tinctoria George K. Helmkamp, E. A. Helmkamp 2009-6-6 14922 El Dorado Sierra Nevada Mountains Foothills, along Mosquito Road, 6.2 miles north of its junction with CA-50 in Placerville and at the bridge over the American River 485 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
  UCR87687  Collomia grandiflora George K. Helmkamp, E. A. Helmkamp 1995-6-22 s.n. Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  SD248473  Collomia heterophylla George K. Helmkamp, Mary Alice Barnes 2013-5-3 20473 Placer Foothills, Northern Sierra Nevada Mountains: Mosquito Ridge Road, 1.1 miles south of Forest Hill Road (Forest Hill 7.5'Q) 961 Comment
  SEINET4691692  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-1 17366 El Dorado Northern Sierra Nevada Mountains Foothills: Mesquite Road, 7.5 miles south of its junction with Wentworth Springs Road. 1073 Comment
  UCR240893  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2012-6-6 19141 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 6.2 miles south of its junction with CA-88, 5.9 mi. SW (245 deg. ) of Bear River Reservoir dam 1438 Comment
  UCR249142  Collomia heterophylla George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20764 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  SEINET13203112 Image available Conium maculatum George K. Helmkamp, Mary Alice Barnes 2013-1 20516 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
  UCR103968  Conium maculatum George K. Helmkamp 1997-6-22 2081 San Luis Obispo Central Coast, South end of Montana de Oro State Park 15 Comment
  SD239710  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2011-7-17 17783 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, just northeast of its junction with CA-1741.25 mile East (91a^z) of Peardale (Chicago Park 7.5'Q) 778 Comment
  UCR188483  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2007-9-30 13052 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR118351  Conyza bonariensis George K. Helmkamp, E. A. Helmkamp 2000-9-1 5962 San Luis Obispo Los Osos, Martingale at Buckskin 30 Comment
  IRVC29228  Conyza canadensis G. K. Helmkamp, E. A. Helmkamp 2004-10-8 8848 San Luis Obispo Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek Central Coast 136 Comment
  SEINET3245871  Conyza canadensis G. K. Helmkamp, E. A. Helmkamp 2009-1 15563 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
  UCR134465  Cordylanthus kingii subsp. helleri George K. Helmkamp, E. A. Helmkamp 1998-8-11 4340 Inyo White Mountains, Junction of White Mountain Road and Calif. Hwy 168 1738 Comment
  UCR133513  Cordylanthus rigidus George K. Helmkamp 1993-9-22 34- 14 San Bernardino San Bernardino Mtns., 6.7 mi. up Burns Canyon from junction of Pioneertown and Pipes Canyon Roads 1529 Comment
  CAS-BOT-BC226259  Cordylanthus tenuis subsp. tenuis George K. Helmkamp; E. A. Helmkamp 2010-9-23 16972 El Dorado Northern Sierra Nevada Mountains: Round Tent Canyon Road, 0.56 miles west of its junction with Peavine Ridge Road at Forest Route 31 1521 Comment
  UCR234207  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2010-9-23 16972 El Dorado Northern Sierra Nevada Mountains, Round Tent Canyon Road, 0.56 miles west of its junction with Peavine Ridge Road at Forest Route 31 1521 Comment
  UCD117170  Cornus nuttallii G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10345 Amador Northern Sierra Nevada Foothills: ESE of Sacramento, 3.2 mi. E of Pine Grove along CA Hwy 88. 841 Comment
  UCR197631  Cornus nuttallii George K. Helmkamp, E. A. Helmkamp 2008-6-9 13645 El Dorado Northern Sierra Nevada Mountains, Cat Creek Road, 0.1 mile north of its junction with CA-88, jct. is 4.2 miles east of Cook's Station 1662 Comment
  UCR250173  Cornus nuttallii George K. Helmkamp, E. A. Helmkamp 2009-5-4 14593 El Dorado Sierra Nevada Mountains Foothills, Capps Crossing Road, 1.1 miles south of its junction with Mormon Emigrant Trail 1189 Comment
  UCR115773  Cornus sericea subsp. occidentalis George K. Helmkamp, E. A. Helmkamp 2000-4-20 5398 A San Luis Obispo Central Coast, Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
  UCD101839  Crassula connata G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11653 Calaveras Eastern Sacramento Valley. About 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCR14443  Crepis acuminata George K. Helmkamp 1974-6-9 s.n. Mono 10 mi south of Bridgeport on US Hwy 395 2344 Comment
  CLARK-A1045-300  Crepis capillaris George K. Helmkamp 1977-3-20 Riverside Deep Canyon dry wash of Deep canyon; ; Palm Desert 15'Q Comment
  UCR87515  Crocidium multicaule George K. Helmkamp, E. A. Helmkamp 1983-5-4 s.n. Modoc Along Calif. Hwy 139, 16.1 mi NW of Canby. 1428 Comment
  UCR37743  Crossosoma bigelovii George K. Helmkamp 1983-10-8 B 39 San Bernardino Little San Bernardino Mountains, TNC Big Morongo Preserve, in Big Morongo Canyon, south of town of Morongo Valley in Big Morongo Canyon 762 Comment
  UCR89872  Croton californicus George K. Helmkamp 1994-3-8 41 13 Riverside Western Colorado Desert, Indio Hills, junction of Palm Dr. & Varner Rd, below Edom Hill 200 Comment
  SEINET4560895  Croton setiger George K. Helmkamp, E. A. Helmkamp 2011-1 17786 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
  UCR123919  Croton setiger George K. Helmkamp, E. A. Helmkamp 2001-7-8 6936 Trinity Trinity Mountains, Calif. Hwy 36, 2.2 mi west of the Trinity/Shasta Co. line 1159 Comment
  UCR219648  Croton setiger George K. Helmkamp, E. A. Helmkamp 2010-6-26 16370 Placer Sierra Nevada Mountains Foothills, junction of Canyon Way and Yankee Jim's Road, east of I-80 between Weimar and Colfax 616 Comment
  UCR233009  Croton setiger George K. Helmkamp, E. A. Helmkamp 2011-10-15 18448 Stanislaus Eastern San Joaquin Valley, along J-4 (Milton Rd.), 1.7 miles south of its junction with CA-4, 12 mi. NE (44 deg. ) of Escalon 64 Comment
  RSA785395  Crucianella angustifolia George K. Helmkamp, E. A. Helmkamp 2010-6-23 16356 Amador Sutter Creek Road, 9.5 miles northeast of its junction with old CA-49 in Sutter Creek village 576 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
  RSA615343  Cryptantha angustifolia George K. Helmkamp, E. Helmkamp 1998-2-18 2706 Riverside Colorado Desert: Midland Road, 3.8 miles SE of Midland, Little Maria Mountains Comment
  UCR100868  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 1998-2-18 2706 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  UCR101628  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 1998-2-26 2787 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
  UCR132765  Cryptantha barbigera var. fergusoniae George K. Helmkamp 1984-4-20 840420- 29 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
  UCR51454  Cryptantha circumscissa George K. Helmkamp 1987-6-17 s.n. Mono Owens Valley, Owens River, alkaline flats between river and Glass Mtn, c. 6 mi. NE of Benton's Crossing 2195 Comment
  UCR160284  Cryptantha clevelandii George K. Helmkamp 2004-5-23 8586 Santa Barbara Southern Central Coast, Lompoc-Casmalia Rd, 1.4 mi south of the junction to Casmalia 183 Comment
  UCR163771  Cryptantha clevelandii George K. Helmkamp, E. A. Helmkamp 2005-3-31 9283 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. 14.0 mi NE of Los Olivos along Figueroa Mountain Road 1000 Comment
  UCR15590  Cryptantha confertiflora George K. Helmkamp 1978-5-29 s.n. Mono East Walker River at the Nevada border 1829 Comment
  UCR104866  Cryptantha costata George K. Helmkamp 1998-3-30 3022 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR132767  Cryptantha decipiens George K. Helmkamp 1984-5-2 D- 27 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 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
  CLARK-A1045-329  Cryptantha intermedia George K. Helmkamp 1977-3-20 Riverside Cabazon dry wash south of Cabazon; ; Cabazon 7.5'Q Comment
  RSA666652  Cryptantha intermedia George K. Helmkamp, E. Helmkamp 2001-5-2 6634 San Luis Obispo La Panza Range; Hwy 58, 11.2 miles E of Santa Margarita., 35 27.57 N, 120 27.47 W 488 Comment
  CLARK-A1045-773  Cryptantha micrantha George K. Helmkamp 1977-6-6 San Bernardino San Bernardino Mountains meadow at the edge of a drying, temporary pool; ; Keller Peak 7.5'Q 2133 Comment
  UCR130247  Cryptantha mohavensis George K. Helmkamp, E. A. Helmkamp 2001-4-27 6502 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  UCR196923  Cryptantha muricata var. denticulata George K. Helmkamp, E. A. Helmkamp 2008-7-22 13869 Alpine Eastern Sierra Nevada Mountains, along CA-88/89 at the east end of Hope Valley at the West Fork of the Carson River 2104 Comment
  UCR190655  Cryptantha nevadensis var. rigida George K. Helmkamp, E. A. Helmkamp 2005-4-22 9409 San Luis Obispo Inner South Coast Ranges, Carrizo Highway at Mile-32, Calif. Hwy 58, east of Santa Margarita, beside Windmill Creek 509 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
  UCR230729  Cryptantha simulans George K. Helmkamp, E. A. Helmkamp 2011-7-19 17801 Tuolumne Northern Sierra Nevada Mountains Foothills, Forest Route 5N14, 1.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1143 Comment
  UCR124008  Cryptantha torreyana George K. Helmkamp, E. A. Helmkamp 2001-7-8 6948 Trinity Trinity Mountains, Calif. Hwy 36, 2.2 mi west of the Trinity/Shasta Co. line 1159 Comment
  CLARK-A1045-1078  Cryptantha watsonii George K. Helmkamp 1979-6-12 Mono Owens River beside River at Arcularius Ranch; ; Crestview 7.5'Q 2133 Comment
  RSA653139  Cryptogramma acrostichoides George K. Helmkamp, E. A. Helmkamp 1999-6-30 5079 Nevada Northern Sierra Nevada Range, Tahoe National Forest, Donner Pass Road, 2.2 miles west of Lake Donner. 1997 Comment
  SD144156  Cryptogramma cascadensis G. Helmkamp, E. Helmkamp 1997-9-11 2362 Mono Along highway CA-120. 0.5 miles N of Tioga Pass; Nunatak meadow area with willows. 2955 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
  UCD126357  Cuscuta occidentalis G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11057 El Dorado Northern Sierra Nevada Mountains. Along Wright's Lake Road (Forestry Route 4) at Lyons Creek, 3.3 miles north of Hwy. U.S. 50. 2048 Comment
  UCR15581  Cusickiella quadricostata George K. Helmkamp 1978-5-30 s.n. Mono Eastern Sierra Nevada, [Bodie Hills], Virginia Creek Campground [= Willow Springs Motel & RV Park?] 2134 Comment
  UCR241980  Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2012-9-7 19790 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
  UCR170810  Cynoglossum occidentale George K. Helmkamp, E. A. Helmkamp 2005-8-9 9786 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR217163  Cynosurus echinatus George K. Helmkamp, E. A. Helmkamp 2010-5-17 16050 El Dorado Sierra Nevada Mountains Foothills, Pine Hill Road at the junction with Bertana Court; southeast edge of State Ecological Preserve, 1.6 mi. NW (293 deg. ) of Rescue 459 Comment
  UCR232684  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2011-10-15 18442 San Joaquin San Joaquin Valley, along CA-4, 0.4 mile east of Farmington 41 Comment
  UCR241318  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2012-9-20 19877 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
  UCR259864  Cyperus eragrostis George K. Helmkamp, Elizabeth Helmkamp 2013-10-22 22459 Amador Sierra Nevada Mountains Foothills, Shenandoah Road, near Sobon Creek, 6.8 miles northeast of its junction with CA-49 in Plymouth 563 Comment
  UCR134427  Cyperus involucratus George K. Helmkamp 2003-9-19 8149 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR253087  Cyperus niger George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22154 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 11.3 miles northeast of the town of Sutter Creek 582 Comment
  UCR219123  Cyperus odoratus George K. Helmkamp, E. A. Helmkamp 2009-8-30 15552 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
  UCR230080  Cyperus odoratus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17050 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  SEINET11261809  Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 2012-4-27 18868 El Dorado Northern Sierra Nevada Mountains Foothills: Mosquito Road N of Placerville, at the S side of the crossing of the South Fork American River.; 0 401 Comment
  UCR103815  Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 1997-9-10 2337 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
  UCR230938  Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 2011-6-9 17540 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
  UCD105678  Cytisus scoparius G. K. Helmkamp; E. A. Helmkamp 2006-10-10 11522 Nevada Northern Sierra Mountains Foothills: along Hwy. CA-49, 5.8 miles NNW of Nevada City. 750 Comment
  UCR200919  Cytisus scoparius George K. Helmkamp, E. A. Helmkamp 2008-9-9 14081 El Dorado Foothills, northern Sierra Nevada Mountains, junction of Bear Creek Road and Meadow Brook Road at Bear Creek; east of CA-193 and south of Georgetown 678 Comment
  UCR174529  Dactylis glomerata George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10417 Nevada Northern Sierra Nevada Foothills, along Calif. Hwy 49, 2.1 mi. N of the South Yuba River bridge 534 Comment
  CLARK-A1045-355  Dalea fremontii var. minutifolia George K. Helmkamp 1977-5-30 San Bernardino junction of Kelbaker Road with Interstate Highway 40; sandy flat; Cadiz 15'Q Comment
  UCR92501  Dalea mollissima 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
  UCR229540  Danthonia unispicata George K. Helmkamp, E. A. Helmkamp 2011-7-26 17869 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
  UCD127388  Daucus carota G. K. Helmkamp; E. A. Helmkamp 2006-9-29 11445 El Dorado Northern Sierra Nevada Mountains Foothills: Salmon Falls Road just west of CA-49 and 4 miles south of Cool. 351 Comment
  UCR182290  Daucus carota George K. Helmkamp, E. A. Helmkamp 2006-10-8 11488 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
  UCR206294  Daucus pusillus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14734 Yolo Inner Coast Range, west side of Cache Creek along CA-16, 5.5 miles southeast of the Colusa County line 177 Comment
  SEINET12799765  Deinandra increscens George K. Helmkamp, E. A. Helmkamp 2005-1 9644 San Luis Obispo South Central Coast Rangers: along Hwy CA-58 (Calf Cyn Hwy), 6.7 miles east of Santa Margarita. 1590 ft. elev. 488 Comment
  UC1792807  Deinandra pentactis G. K. Helmkamp, E. A. Helmkamp 2005-6-12 9649 San Luis Obispo Central Coast Range: along Hwy CA-58 (Carrizo Hwy), 22.2 miles east of Santa Margarita; near Camatta Creek 551 Comment
  CLARK-A1045-1351  Delphinium ajacis George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay disturbed soil; Morro Bay S 7.5'Q Comment
  UCD95704  Delphinium depauperatum G. K. Helmkamp; E. A. Helmkamp 2006-7-7 10861 El Dorado Northern Sierra Nevada Mtns: Wright's Lake Road, 4.1 miles north of Hwy. US-50, northeast of Kyburz. 2049 Comment
  UCR123405  Delphinium gracilentum George K. Helmkamp, E. A. Helmkamp 1998-8-12 4387 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR207880  Delphinium gracilentum George K. Helmkamp, E. A. Helmkamp 2009-5-14 14705 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  RSA613929  Delphinium gypsophilum subsp. gypsophilum George K. Helmkamp 1988-4-9 3251 Kern 14 miles NE of Taft. along Tupman Rd just N of its intersection w/ Ca hwy 199 (W of the outlet canal). 91 Comment
  SD143768  Delphinium gypsophilum subsp. gypsophilum G. K. Helmkamp, E. A. Helmkamp 1998-4-9 3251 Kern 14 mi. NE of Taft; along Tupman Rd just N of its intersection w/CA Hwy 199 (W of the outlet canal). 91 Comment
  UCR256516  Delphinium hansenii George K. Helmkamp, Amy Barnes 2014-5-8 22867 El Dorado Sierra Nevada Mountains Foothills, along CA-49 near Ramales Lane, c. 0.7 mile north of Union Mine Road junction 282 Comment
  CAS-BOT-BC177350  Delphinium nuttallianum G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12060 Placer Northern Sierra Nevada Mountains: Humbug Canyon Road, 0.2 mile northwest of Forest Hill Road, generally southwest of Westville 1576 Comment
  UCR159227  Delphinium parryi subsp. parryi George K. Helmkamp, E. A. Helmkamp 2005-4-22 9393 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR160728  Dendromecon rigida George K. Helmkamp, E. A. Helmkamp 2005-6-5 9524 Monterey Outer Central Coast Ranges; Santa Lucia Range, 5.0 mi east of Calif. Hwy 1 along Los Burros Road 826 Comment
  UCR196770  Dendromecon rigida George K. Helmkamp, E. A. Helmkamp 2008-6-3 13587 El Dorado Sierra Nevada Mountains, Forbay Road, 4.8 miles northwest of its junction with CA-50 at Pollock Pines 965 Comment
  RSA757004  Deschampsia cespitosa subsp. cespitosa George K. Helmkamp, Amy Barnes 2009-7-8 15144 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
  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
  SEINET3927577  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2009-8-4 15389 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 1000 Comment
  UCD63430  Deschampsia elongata G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11138 Alpine Northern Sierra Nevada Mountains. Wood's Lake Road, 0.3 mile N of the parking area for Wood's Lake. Wood's Creek. 2509 Comment
  UCR196860  Deschampsia elongata George K. Helmkamp 2008-6-17 13701 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.1 mile south of its junction with CA-88, junction 4.0 miles east of Cook's Station 1652 Comment
  UCR237378  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2012-6-13 19174 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  UCR242565  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2011-5-24 17374 El Dorado Northern Sierra Nevada Mountains Foothills, Mesquite Road, 11.2 miles south of its junction with Wentworth Springs Road, 7.3 mi. NE (42 deg. ) of Placerville 1073 Comment
  UCR122955  Descurainia pinnata subsp. halictorum George K. Helmkamp, E. A. Helmkamp 2001-3-30 6455 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  SD236349  Dicentra formosa G. K. Helmkamp 2008-6-17 13686 Amador Northern Sierra Nevada Mountains: Bear River Reservoir Road along the south side of Bear River Reservoir. 1797 Comment
  UCR173297  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, Elizabeth Helmkamp 2006-4-27 10248 El Dorado Northern Sierra Nevada Foothills, c. 20 mi. by air east of Sacramento; 0.9 mi. N of Brandon Corner along French Creek Road 256 Comment
  UCR197259  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2008-4-30 13348 El Dorado Sierra Nevada Mountains Foothills, junction of Meadow Brook and Bear Creek Roads at Traverse Creek, south of Georgetown 674 Comment
  UCR197543  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2008-3-22 13224 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, along CA-26, 3.7 miles southwest of Valley Springs at Lime Creek Road 143 Comment
  UCR197798  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2008-3-22 13210 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
  UCR173260  Dichelostemma volubile George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10456 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
  UCR234633  Dichelostemma volubile George K. Helmkamp, E. A. Helmkamp 2011-6-2 17451 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
  UCR190324  Digitalis purpurea George K. Helmkamp, E. A. Helmkamp 2007-8-1 12663 Nevada Northern Sierra Nevada Mountains, near Camp Spaulding; along Lake Spaulding Road 0.4 mile north of its junction with CA-20 1573 Comment
  SEINET13203109 Image available Digitaria sanguinalis George K. Helmkamp, E. A. Helmkamp 2012-1 19795 Amador Northern Sierra Nevada Mountains Foothills: along CA-49 in Plymouth; 0.1 mile south of its junction with Fiddletown Rd./Plymouth-Shenandoah Rd. (Amador City 7.5' Q.) 303 Comment
  UCR258182  Digitaria sanguinalis George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20039 Placer Sierra Nevada Mountains Foothills, city of North Auburn, corner of Locksley Lane and CA-49 384 Comment
  SD243209  Diplacus 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. Burned area north of road. 1662 Comment
  CAS-BOT-BC257277  Diplacus viscidus George K. Helmkamp; E. A. Helmkamp 2011-7-7 17635 El Dorado Northern Sierra Nevada Mountains: Park Creek Road, 0.4 mile east of its junction with (Co. Rd. E16) Sly Park Road, 1.4 mi. SE (111 deg. ) of Pollock Pines 1290 Comment
  UCR59723  Ditaxis neomexicana 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
  UCR120524  Dithyrea californica George K. Helmkamp, E. A. Helmkamp 2001-3-17 6274 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  RSA725960  Dittrichia graveolens George K. Helmkamp, E. A. Helmkamp 2006-10-23 11567 Amador Central Valley/Northern Sierra Nevada Foothills: along CA-16, 0.2 mile east of Waits Station, southwest of Plymouth. 305 Comment
  SD239585  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. 342 Comment
  UCR194695  Dittrichia graveolens George K. Helmkamp, E. A. Helmkamp 2007-10-13 13099 Amador Central Valley / Northern Sierra Nevada Foothills, along CA-124, 0.3 mile north of its junction with CA-88 and south of Ione 87 Comment
  UCR259876  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 268 Comment
  UCR219675  Dodecatheon alpinum George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16583 El Dorado Northern Sierra Nevada Mountains, southernmost point of Wright's Lake, 5.6 mi. NE (33 deg. ) of Kyburz 2085 Comment
  UCR197541  Dodecatheon hendersonii George K. Helmkamp, E. A. Helmkamp 2008-3-22 13235 Calaveras Sierra Nevada Mountains Foothills, along Mokelumne Vista Road at the junction with CA-49, just west of Mokelumne Hill village 479 Comment
  UCR217400  Downingia George K. Helmkamp, E. A. Helmkamp 2010-5-4 15953 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
  SEINET2441337  Draperia systyla George K. Helmkamp, E. A. Helmkamp 2009-8-12 15426 Placer Sierra Nevada Mountains: Forest Hill Road, 20.5 miles northeast of the city of Foresthill (Duncan Peak 7.5' Q.). 1662 Comment
  UCD113136  Drymocallis glandulosa var. glandulosa G. K. Helmkamp; Elizabeth Helmkamp 2006-5-24 10527 El Dorado Northern Sierra Nevada: NE of Georgetown; along Bottlehill Road, 1.4 mi. N of Wentworth Springs Road. 1006 Comment
  UCD113012  Drymocallis lactea var. lactea G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10972 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCR13901  Drymocallis lactea var. lactea George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at and near Big Springs 2195 Comment
  UCR222528  Dryopteris arguta George K. Helmkamp, E. A. Helmkamp 2010-6-5 16249 Sonoma North Coast Ranges, Vellutini Road, 1.3 miles northwest of its junction with Martinelli Road, 3.5 air mi. ESE (98 deg. ) of Guerneville 44 Comment
  UCR184378  Duchesnea indica George K. Helmkamp, E. A. Helmkamp 2007-3-7 11598 El Dorado Foothills, northern Sierra Nevada Mountains, Diamond Springs. Lake Oaks Mobile Home Park, junction of Pleasant Valley Rd and Patterson Dr. 521 Comment
  SEINET3246204  Dysphania ambrosioides G. K. Helmkamp, E. A. Helmkamp 2008-1 14285 Sacramento Southern Sacramento Valley: Highway E13 (Twin Cities Road), 3.5 miles west of CA-99. (Bruceville 7.5' Quad) 20 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
  UCR234205  Dysphania botrys George K. Helmkamp, E. A. Helmkamp 2010-9-23 16974 El Dorado Northern Sierra Nevada Mountains, Round Tent Canyon Road, 0.56 miles west of its junction with Peavine Ridge Road at Forest Route 31 1521 Comment
  CLARK-A1045-727  Dyssodia cooperi George K. Helmkamp 1978-5-1 San Bernardino Mojave Desert at camp road; Ord Mts 15'Q Comment
  UCR50719  Dyssodia cooperi George K. Helmkamp 1988-4-29 s.n. San Bernardino Eastern Mojave Desert, 0.2 mi north of Goffs 793 Comment
  UCR44827  Dyssodia porophylloides George K. Helmkamp 1986-10-18 s.n. San Bernardino Sonoran (Colorado) Desert, Whipple Mountains, along Havasu Palms Road, c. 3 mi NW of Black Meadow Landing Road 396 Comment
  SEINET3271587 Image available Echinochloa colona George K. Helmkamp, Amy Barnes 2009-7-7 15114 El Dorado Sierra Nevada Mountains Foothills; Forbay Road, at the north side of its crossing of the South Fork American River, about 7 miles north of Pollock Pines 579 Comment
  UCR241751  Echinochloa colona George K. Helmkamp, E. A. Helmkamp 2012-10-9 20009 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
  UCR59847  Echinochloa colona George K. Helmkamp 1989-9-16 s.n. Riverside Sonoran (Colorado) Desert, W of Blythe, c. 0.5 mi. south of Hwy I-10 ['I-8'] , at Seeley Ave. [=16th Ave.] and Calif. Hwy 78 79 Comment
  RSA0069429  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2006-9-29 11444 El Dorado Northern Sierra Nevada Mountains Foothills. Salmon Falls Rd just west of Calif. Hwy 49 and 4 miles south of Cool. 351 Comment
  UCR179823  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2006-10-18 11538 El Dorado Northern Sierra Nevada Mountains Foothills, Diamond Springs; village along Calif. Hwy 49 south of Placerville 540 Comment
  UCR253542  Echinochloa muricata George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20085 San Joaquin San Joaquin Valley, Littlejohns Creek, along unnamed dirt road 0.3 mi. south of CA-4 at a point 0.5 miles east of Farmington 32 Comment
  UCR197023  Eleocharis macrostachya George K. Helmkamp, E. A. Helmkamp 2008-7-22 13854 Alpine Eastern Sierra Nevada Mountains, Blue Lake Road just southeast of its junction with CA-88 2180 Comment
  UCR232249  Elymus caput-medusae George K. Helmkamp, E. A. Helmkamp 2011-5-6 17214 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
  UCR14530  Elymus cinereus George K. Helmkamp 1974-6-8 s.n. Inyo Owens Valley, Pleasant Valley along the Owens River, 9 mi NW of Bishop 1311 Comment
  UCR193104  Elymus cinereus George K. Helmkamp, E. A. Helmkamp 2007-6-12 12346 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road 0.6 mile north of Hwy CA-20, at the border of Placer Co. 1387 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
  UCR237279  Elymus elymoides subsp. elymoides George K. Helmkamp, E. A. Helmkamp 2012-7-2 19301 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam of Lower Bear River Reservoir 1774 Comment
  SEINET3837938 Image available Elymus glaucus George K. Helmkamp, E. A. Helmkamp 2011-7-19 17850 Calaveras Northern Sierra Nevada Mountains Foothills: Forestry Route 5N75, 1.1 miles W of Boards Crossing bridge over North Fork Stanislaus River (Boards Crossing) 1280 Comment
  UCR196845  Elymus glaucus George K. Helmkamp, E. A. Helmkamp 2008-6-3 13570 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
  SEINET7249317  Elymus glaucus George K. Helmkamp, Elizabeth Helmkamp 2013-1 Calaveras 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
  UCR253107  Elymus glaucus var. 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 1537 Comment
  UCR118952  Elymus hispidus George K. Helmkamp 2000-7-18 5849 Mono Eastern Sierra Nevada Mountains, city of Mammoth Lakes 2409 Comment
  SD130219  Elymus triticoides G. Helmkamp 1989-8-1 Mono Moist meadow beside U.S. Hwy 395, just S of Devil's Gate Summit 2255 Comment
  UCR100324  Encelia actoni George K. Helmkamp 1997-11-2 2511 A San Bernardino Mojave Desert/Little San Bernardino Mountains, Morongo Valley, Vista Drive and Pinyon [St.] 793 Comment
  UCR89568  Encelia farinosa George K. Helmkamp 1994-3-8 41- 01 Riverside Western Colorado Desert, Indio Hills, junction of Palm Dr. & Varner Rd, below Edom Hill 200 Comment
  UCR104014  Encelia farinosa var. phenicodonta George K. Helmkamp 1998-4-4 3134 Riverside Sonoran (Colorado) Desert, junction of Calif. Hwy 62 (Twentynine Palms Hwy) & Calif. Hwy 177 (Desert Center-Rice Rd) 457 Comment
  SEINET269422  Ephedra californica G. Helmkamp 1994-3-8 41 -6 Riverside Indio Hills. southwest facing slope at the junction of Palm Drive and Varner Road below Edom Hill 300 Comment
  UCR130978  Ephedra funerea George K. Helmkamp, E. A. Helmkamp 1998-5-3 3528 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  SD144511  Ephedra trifurca G. K. Helmkamp, E. Helmkamp 1998-1-24 2569 Imperial Between Hwy I-8 and the All-American Canal, across from the Brock Research Center (ca. 3 miles east of the junction of Hwy CA-98 with Hwy I-8). (IPB 10/07) 46 Comment
  UCR57508  Epilobium angustifolium 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
  SEINET3245906  Epilobium angustifolium subsp. circumvagum G. K. Helmkamp, E. A. Helmkamp 2008-1 13939 El Dorado Northern Sierrra Nevada Mountains: Writ's Lake Road, 3.8 miles north of its junction with CA-50 (Pyramid Peak 7.5' Q) 2076 Comment
  UCR114370  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, E. A. Helmkamp 1997-9-8 2275 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR235120  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, William Barnes 2010-9-4 16934 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR235310  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, William Barnes 2010-9-4 16947 Alpine Northern Sierra Nevada Mountains, Red Vista Road, 0.6 mile southeast of its junction with CA-88 just east of Carson Pass 2553 Comment
  CDA25628  Epilobium brachycarpum G. K. Helmkamp, E. A. Helmkamp 2008-10-9 14229 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, northeast of Lodi. Comment
  CHSC118018  Epilobium brachycarpum G. K Helmkamp; E. A Helmkamp 2007-9-19 12983 El Dorado Foothills, northern Sierra Nevada Mountains; along Greenstone Road just south of its junction with US-50 (east of Shingle Springs) 427 Comment
  SEINET3282761 Image available Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-24 13012 Calaveras Foothills, northern Sierra Nevada Mountains; in Rich Gulch along Gwin Mine Road, 2.6 miles north of Paloma and directly above the Mokelumne River. 194 Comment
  UCD105360  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-8-26 12813 Amador Northern Sierra Nevada Mountains. Along Hwy CA-49 at mile-20, 2.1 miles N of Plymouth; beside Blue Indian Creek. 299 Comment
  UCR114242  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 1997-9-9 2297 Alpine Sierra Nevada Mtns., junction of Calif. Hwy 89 and Calif. Hwy 4, south of Markleeville 1799 Comment
  UCR131912  Epilobium brachycarpum George K. Helmkamp 2003-10-24 8220 San Luis Obispo Central Coast, El Campo Rd 0.1 mi east of Los Berros Rd, SE of Arroyo Grande 46 Comment
  UCR189943  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-9-9 12910 Sacramento Sacramento Valley, along Hwy CA-16, 0.8 mile west of the Amador County line 85 Comment
  UCR190657  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-5-23 12079 Placer Northern Sierra Nevada Mountains Foothills, junction of Iowa Hill Road and Finning Mill Road (U. S. F. S. Rd #10) in the Sugar Pine Recreation area 1137 Comment
  UCR253632  Epilobium brachycarpum George K. Helmkamp, Elizabeth Helmkamp 2012-11-12 20126 El Dorado East end of Sacramento Valley, El Dorado Hills; 100 yards east of Golden Foothill Parkway on Cypress Point Ct. (cul-de-sac), 0.7 mile south of Windfield Parkway 159 Comment
  UCR257799  Epilobium brachycarpum George K. Helmkamp, Amy Barnes 2012-8-12 19621 Alpine Northern Sierra Nevada Mountains, along CA-89/Carson Pass Hwy in West Carson Canyon, 1.4 miles east of the junction with CA-88 2034 Comment
  UCR257919  Epilobium brachycarpum George K. Helmkamp, Amy Barnes 2014-7-28 22965 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road, 1.6 miles west of Ice House Road 1863 Comment
  UCR67373  Epilobium brachycarpum George K. Helmkamp 1990-9-23 E- 17 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UCR119350  Epilobium canum subsp. canum George K. Helmkamp, E. A. Helmkamp 2000-9-2 5975 San Luis Obispo Irish Hills, See Canyon (S portion), c. 1.8 mi north of San Luis Bay Drive (N of Avila Beach) 91 Comment
  UCR136207  Epilobium canum subsp. latifolium George K. Helmkamp, E. A. Helmkamp 1999-9-30 5294 San Bernardino San Bernardino Mountains, 5.7 miles up Burns Cyn Rd from Rimrock Rd., NW of Pioneertown 1768 Comment
  UCR170351  Epilobium canum subsp. latifolium George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9899 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
  UCD105620  Epilobium ciliatum G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11190 El Dorado Northern Sierra Nevada Mountains. Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road. 2250 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
  UCR233403  Epilobium ciliatum subsp. glandulosum George K. Helmkamp, E. A. Helmkamp 2011-8-26 18183 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
  SD241112  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2011-7-12 17700 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 6.7 miles east of its junction with CA-26 in West Point (Devils Nose 7.5'Q) 1192 Comment
  UCR197518  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2008-5-30 13549 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs; corner of Patterson Dr. and CA-49 530 Comment
  UCR241753  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2012-10-9 20007 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
  UCR234604  Epilobium foliosum George K. Helmkamp, E. A. Helmkamp 2011-8-6 18016 Amador Northern Sierra Nevada Mountains, along dirt road 0.3 mile east of Bear River Reservoir Road, from a point 0.7 mile south of CA-88 1986 Comment
  UCR232806  Epilobium glaberrimum subsp. fastigiatum George K. Helmkamp, E. A. Helmkamp 2011-9-1 18193 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz 1280 Comment
  UCR242841  Epilobium glaberrimum subsp. fastigiatum George K. Helmkamp, E. A. Helmkamp 2010-9-1 16908 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
  SD239832  Epilobium glaberrimum subsp. glaberrimum George K. Helmkamp, William Barnes. 2010-9-4 16920 El Dorado Northern Sierra Nevada Mountains: Mehrten Spring Road and continuing on Cat Creek Road, 4.7 miles northwest of CA-88; Middle Fork of Consumnes River (Peddler Hill 7.5'Q) 619 Comment
  UCD106317  Epilobium glaberrimum subsp. glaberrimum G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12609 Nevada Northern Sierra Nevada Mountains: Bowman Lake Road, 11.2 miles north of its junction with CA-20. 1793 Comment
  UCR235145  Epilobium glaberrimum subsp. glaberrimum George K. Helmkamp, William Barnes 2010-9-4 16920 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
  CLARK-A1045-1055  Epilobium paniculatum George K. Helmkamp 1977-9-1 IV Mono Antelope Valley along River, one mile north of Coleville; ; Coleville 7.5'Q 1676 Comment
  UCD135272  Equisetum arvense G. K. Helmkamp; E. A. Helmkamp 2007-9-2 12880 El Dorado Northern Sierra Nevada Mountains. Grizzly Flat Road 5.2 miles ESE of Somerset, just west of Coles Station. 957 Comment
  UCR232656  Equisetum arvense George K. Helmkamp, E. A. Helmkamp 2011-9-30 18354 Nevada Foothills, northern Sierra Nevada Mountains, Mule Spring Rd. off Lowell Hill Road, 6.2 miles northeast of Lowell Hill junction with Dutch Flat X Road at lower end of Bear River Reservoir 1189 Comment
  UCD107064  Eremothera boothii subsp. desertorum G. K. Helmkamp; E. A. Helmkamp 1998-2-18 2743 Riverside Chuckwalla Mountains. Graham Pass Road, 10.6 miles SSW of Chuckwalla Valley Road. 487 Comment
  UCR115589  Eriastrum densifolium subsp. densifolium George K. Helmkamp, E. A. Helmkamp 2000-6-15 5677 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR123204  Eriastrum eremicum George K. Helmkamp, E. A. Helmkamp 1993-6-16 160 Inyo Owens Valley, 2 mi east of Pleasant Valley Campground along Chalk Bluff Road, NW of Bishop 1280 Comment
  CLARK-A1045-553  Eriastrum sapphirinum George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains 5.7 miles east of Cajon Junction, off Interstate Highway 15; Cajon 7.5'Q Comment
  UCR21764  Eriastrum sparsiflorum George K. Helmkamp 1980-7-15 s.n. Kern Transverse Range; Mt. Pinos Area, 3 miles west of Frazier Park in Cuddy Valley 1601 Comment
  UCR219161  Ericameria arborescens George K. Helmkamp, E. A. Helmkamp 2009-10-20 15693 El Dorado Sierra Nevada Mountains Foothills, Freshwater Lane, 0.7 mile southeast of its junction with Sand Ridge Road, 7.5 air mi. SSE (176 deg. ) of Diamond Springs 494 Comment
  SD148245  Ericameria linearifolia G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6555 Kern Temblor Range; California Highway 58, 1.1 mile southwest of the San Luis Obispo County line. 793 Comment
  UCR15464  Ericameria nauseosa var. speciosa George K. Helmkamp 1977-9-1 s.n. Alpine Sierra Nevada Mountains, just over the east crest of Monitor Pass 2500 Comment
  UCR257722  Ericameria nauseosa var. speciosa George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19434 Sierra Northern Sierra Nevada Mountains, along Hwy CA-89, c. 8 miles north of the Nevada County line 1823 Comment
  UCR45124  Ericameria paniculata 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
  HSC83089  Ericameria parryi G. K. Helmkamp 1985-8-22 88531 Mono Dry lakebed off of US Hwy 395, ca. 5 mi. N of Mammoth turn-off 2439 Comment
  UCD132087  Erigeron G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12731 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 1.4 miles south of the lake. 2101 Comment
  RSA0013389  Erigeron breweri George K. Helmkamp, E. A. Helmkamp 2010-9-1 16895 El Dorado Northern Sierra Nevada Mountains: Mehrten Springs Road, 0.6 mile north of its junction with CA-88 2018 Comment
  UCR231017  Erigeron breweri George K. Helmkamp, E. A. Helmkamp 2010-8-7 16720 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring 2136 Comment
  UCR257670  Erigeron breweri George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19569 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 1.4 miles west of its junction with CA-88 2287 Comment
  CLARK-A1045-563  Erigeron divergens George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains dirt road [unpaved State Highway 173] between Lake Arrowhead and Mojave River Forks Regional Park; ; Lake Arrowhead 7.5'Q 1523 Comment
  CLARK-A1045-954  Erigeron divergens George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 5 miles north of Isabella Lake; Kernville 7.5'Q 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
  UCR27490  Erigeron foliosus var. foliosus George K. Helmkamp 1982-9-17 s.n. Kern 4.2 mi. above snow gate on the road to Mt. Pinos 2134 Comment
  UCD131982  Erigeron inornatus G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11243 Nevada Northern Sierra Nevada Mountains: about 0.7 mile east of Donner Pass along Donner Pass Road. 2040 Comment
  RSA750730  Erigeron inornatus var. inornatus George K. Helmkamp, E. A. Helmkamp 2008-9-15 14101 Placer along Foresthill Road 26 miles northeast of the city of Forest Hill 1954 Comment
  UCR189633  Erigeron inornatus var. inornatus George K. Helmkamp, E. A. Helmkamp 2007-7-27 12628 Placer Northern Sierra Nevada Mountains, Southeast end of Cisco Grove; along local road just before it passes under Interstate-80 1744 Comment
  UCR190155  Erigeron inornatus var. inornatus George K. Helmkamp, E. A. Helmkamp 2007-8-1 12645 Placer Northern Sierra Nevada Mountains, Donner Pass Road between Donner and Norden, about 0.2 mile east of the Nevada Co. border 2151 Comment
  UCR123519  Erigeron lassenianus var. deficiens George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6860 Plumas Sierra Nevada Mountains, Calif. Hwy 89, 2.3 miles SSE of its junction with Calif. Hwy 36, Lake Almanor Region 1357 Comment
  SEINET3245754  Erigeron peregrinus subsp. callianthemus George K. Helmkamp 2007-1 12546 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
  SEINET4691434  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2010-1 16804 El Dorado Northern Sierra Nevada Mountains: Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring area. 2232 Comment
  UCR206378  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2009-5-20 14759 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  CLARK-A1045-964  Eriogonum angulosum George K. Helmkamp 1977-6-11 A Kern Red Rock Canyon Southwest edge of El Paso Mountains; entry to Canyon; junction of US Highway 6 and road to California City; ; Cantil 7.5'Q 761 Comment
  RSA614910  Eriogonum baileyi var. baileyi George K. Helmkamp, E. A. Helmkamp 1997-9-8 2265 Mono South side of Lake Mary, South of Mammoth Lakes. 2744 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
  UCR13787  Eriogonum caespitosum George K. Helmkamp 1973-6-14 s.n. Mono Eastern Sierra Nevada, Hot Creek Rd. c. 5 miles east of US-395 2200 Comment
  CLARK-A1045-1049  Eriogonum davidsonii George K. Helmkamp 1977-9-1 IV Mono Antelope Valley along River, one mile north of Coleville; ; Coleville 7.5'Q 1676 Comment
  OBI30453  Eriogonum davidsonii G. K. Helmkamp 1982-9-17 s.n. Kern 6.8 mi above the snow gate on the rd to Mt Pinos 2286 Comment
  RSA614903  Eriogonum deflexum var. deflexum George K. Helmkamp 1997-9-29 2434 Inyo Onion Valley Rd, 7.9 mi. W of Hwy US-395 from Independence. 2159 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
  UCR99975  Eriogonum deflexum var. deflexum George K. Helmkamp 1997-9-29 2434 Inyo Sierra Nevada Mountains, Onion Valley Road, 7.9 mi west of Hwy US-395 from Independence 2159 Comment
  UCR102609  Eriogonum esmeraldense var. esmeraldense George K. Helmkamp, E. A. Helmkamp 1997-9-12 2417 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 11 2015
  CLARK-A1045-968  Eriogonum fasciculatum George K. Helmkamp 1977-6-11 A Kern Red Rock Canyon Southwest edge of El Paso Mountains; entry to Canyon; junction of US Highway 6 and road to California City; ; Cantil 7.5' Q 761 Comment
  UCR132289  Eriogonum fasciculatum var. foliolosum George K. Helmkamp 2003-7-29 8030 B San Luis Obispo Central Coast, 0.6 mi south of Nipomo Hill in Arroyo Grande area 46 Comment
  UCR159373A  Eriogonum fasciculatum var. foliolosum George K. Helmkamp, E. A. Helmkamp 2005-5-12 9446 San Luis Obispo Central Coast Ranges, Cholame Hills, 4.0 mi east of San Miguel on Cross Canyon Road 274 Comment
  UCD100198  Eriogonum incanum G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12795 El Dorado Northern Sierra Nevada Mountains; Ice House Road, 0.2 mile south of the north spillway of Loon Lake. 1966 Comment
  UCR170239  Eriogonum marifolium George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9914 El Dorado Northern Sierra Nevada Foothills, Wright's Lake Road (Forest Road 4) c. 4.0 road miles north of US-50, NE of Kyburz 2061 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
  CLARK-A1045-971  Eriogonum nidularium George K. Helmkamp 1977-6-11 A Kern Red Rock Canyon Southwest edge of El Paso Mountains; entry to Canyon; junction of US Highway 6 and road to California City; ; Cantil 7.5'Q 761 Comment
  CLARK-A1045-1190  Eriogonum nudum var. deductum George K. Helmkamp 1977-9-1 VB Alpine Sierra Nevada dry slope under pines; ; Freel Peak 7.5'Q 2346 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
  UCD100562  Eriogonum nudum var. deductum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11001 El Dorado Northern Sierra Nevada Mtns., Echo Summit along Hwy US-50 at entrance to the road maintenance station. 2245 Comment
  UCR229582  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2011-7-30 17910 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
  UCR232163  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2010-8-3 16695 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
  UCR249873  Eriogonum nudum var. deductum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20905 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the junction with Pilliken Road 1825 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
  UCR201517  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2008-8-20 14019 Placer Northern Sierra Nevada Mountains, Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR232648  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2011-9-30 18341 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
  RSA715233  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2005-9-12 9858 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, Sly Park road (County Hwy E-16) 2 miles E of Pleasant Valley. 854 Comment
  UCR240703  Eriogonum nudum var. pubiflorum George K. Helmkamp, E. A. Helmkamp 2012-9-5 19752 El Dorado Northern Sierra Nevada Mountains Foothills, along Lotus Road, 1.6 miles south of its junction with CA-49, 1.45 mi. SW (238 deg. ) of Coloma 248 Comment
  SD232777  Eriogonum nummulare G. K. Helmkamp 1996-10-17 1257 Mono Disturbed roadside 0.3 mi south of Benton Hot Springs beside highway CA-120. 1829 Comment
  UCR158568  Eriogonum parvifolium George K. Helmkamp 2004-6-15 8638 San Luis Obispo Central Coast, Between Oso Flaco Lake and the Pacific Ocean, c. 0.3 mi WNW of the lake 9 Comment
  RSA567981  Eriogonum plumatella George K. Helmkamp 1993-9-12 23 -16 San Bernardino Along the edge of Burns Canyon. 1372 Comment
  CLARK-A1045-552  Eriogonum pusillum George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains 5.7 miles east of Cajon Junction, off Interstate Highway 15; Cajon 7.5' Q Comment
  HSC79078  Eriogonum pusillum G. K. Helmkamp 1984-4-20 44 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
  UCR51295  Eriogonum pusillum 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
  UCR189442  Eriogonum spergulinum var. reddingianum George K. Helmkamp, E. A. Helmkamp 2007-8-4 12703 Alpine Northern Sierra Nevada Mountains, Woods Lake Road 0.1 mile south of its junction with CA-88 2500 Comment
  UCR103293  Eriogonum thomasii George K. Helmkamp 1998-3-30 2994 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR122957  Eriogonum thomasii George K. Helmkamp, E. A. Helmkamp 2001-3-30 6435 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 Comment
  CLARK-A1045-212  Eriogonum trichopes George K. Helmkamp 1979-4-18 Riverside Indio Hills Dillon Road at dry wash; Lost Horse Mtn. 15'Q Comment
  CLARK-A1045-213  Eriogonum trichopes George K. Helmkamp 1979-4-18 Riverside Indio Hills Dillon Road at dry wash; Lost Horse Mtn. 15'Q Comment
  UCR134706  Eriogonum umbellatum var. dichrocephalum George K. Helmkamp, E. A. Helmkamp 1998-8-11 4289 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  UCR201573  Eriogonum umbellatum var. furcosum George K. Helmkamp, E. A. Helmkamp 2008-8-1 13930 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 3.8 miles north of its junction with CA-50 2076 Comment
  SBBG35426  Eriogonum umbellatum var. nevadense G. K. Helmkamp with E. A. Helmkamp 1993-7-28 189 Mono Long Valley mesa at the jct of Owens River Rd and Lake Crowley 2104 Comment
  SD148091  Eriogonum umbellatum var. nevadense G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6818 Mono Sierra Nevada Mountains; Virginia Lakes Rd., 2.4 mi from US-395 2683 Comment
  SEINET3860450  Eriogonum umbellatum var. nevadense George K. Helmkamp 2007-7-7 12494 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 0.2 mile south of its junction with CA-88.; 0 2200 Comment
  CLARK-A1045-437  Eriogonum wrightii George K. Helmkamp 1979-6-20 San Bernardino San Bernardino Mountains 1.5 miles east of Fawnskin; Fawnskin 7.5' Q Comment
  RSA614901  Eriogonum wrightii var. subscaposum George K. Helmkamp 1997-9-29 2428 Inyo Onion Valley in the Sierra Neveda Mnts W of Independence. 2805 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
  SD212687  Eriogonum wrightii var. subscaposum G. K. Helmkamp, Elizabeth Helmkamp 2005-9-30 9935 Placer Northern High Sierra Mountains: Hampshire Rocks Road South of the I-80 Rainbow exit, circa 2 miles East of Cisco Grove. 1805 Comment
  UCR201908  Eriogonum wrightii var. subscaposum George K. Helmkamp, E. A. Helmkamp 2008-8-20 14023 Placer Northern Sierra Nevada Mountains, Donner Pass Road on the west side of Donner Pass and east of Norden 2149 Comment
  UCR142580  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 2000-4-20 5420 San Luis Obispo Central Coast, road crest between See Canyon Road and Prefumo Canyon Road, SW of San Luis Obispo 320 Comment
  UCR160151  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 2005-6-9 9563 San Luis Obispo South Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 5.4 mi northeast of Huasna Township Road. 256 Comment
  SEINET4178520 Image available Eriophyllum lanatum George K. Helmkamp, E. A. Helmkamp 2010-8-3 16694 Calaveras Northern Sierra Nevada Mountains: along CA-4, 0.8 mile southwest of the junction with Forest Route 7N23/Black Creek Road, NE of Dorrington. 1854 Comment
  SBBG129037  Eriophyllum lanatum var. achilleoides G. K. Helmkamp, E. A. Helmkamp 2012-5-31 19087 Calaveras CA-26, 2.2 km NE (63 deg) of Glencoe, 0.8 mi W of the crossing over the S Fork Mokelumne River 741 Comment
  SEINET13276823 Image available Eriophyllum lanatum var. achilleoides George K. Helmkamp, Mary Alice Barnes 2013-1 20620 Calaveras Northern Sierra Nevada Mountains Foothills: Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs (Valley Springs 7.5' Q.) 279 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
  UCR257038  Eriophyllum lanatum var. achilleoides George K. Helmkamp 2014-5-17 22886 Calaveras Sierra Nevada Mountains Foothills, along CA-26, 2.6 miles northeast of CA-49 at Mokelumne Hill 518 Comment
  CHSC118011  Eriophyllum lanatum var. croceum G. K Helmkamp; E. A Helmkamp 2007-7-8 12303 El Dorado Northern Sierra Nevada Mountains: Bonetti Road, 5.4 miles south of Mormon Emigrant Trail, generally east of Jenkinson Lake. 1372 Comment
  RSA749685  Eriophyllum lanatum var. croceum George K. Helmkamp, E. A. Helmkamp 2007-6-8 12303 El Dorado Bonetti Road, 5.4 miles south of Mormon Emigrant Trail, generally east of Jenkinson Lake 1372 Comment
  SD237319  Eriophyllum lanatum var. croceum G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15073 El Dorado Sierra Nevada Mountains: Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74a^z) of Pollock Pines. 1641 Comment
  SEINET13203132 Image available Eriophyllum lanatum var. croceum George K. Helmkamp 2014-1 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 (Rail Road Flat 7.5' Q.) 608 Comment
  UCR174931  Eriophyllum lanatum var. croceum George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10774 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 12.3 miles east of the Mokelumne Hill turnoff from Calif. Hwy 49 640 Comment
  UCR175717  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, E. A. Helmkamp 2006-7-31 11055 El Dorado Northern Sierra Nevada Mountains, along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50 2049 Comment
  UCR122315  Eriophyllum lanatum var. integrifolium George K. Helmkamp, E. A. Helmkamp 1997-9-9 2312 Alpine Sierra Nevada Mountains, Leviathan Lookout Road at the S and W sides of Leviathan Peak, NW of Monitor Pass 2683 Comment
  UCR123229  Eriophyllum lanosum George K. Helmkamp, E. A. Helmkamp 2001-3-30 6436 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR118353  Eriophyllum staechadifolium George K. Helmkamp, E. A. Helmkamp 2000-9-1 5956 San Luis Obispo Los Osos, c. 0.5 miles NW of Hazard Cyn., between Howard St. and sand dunes 6 Comment
  SEINET3821627 Image available 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. (Irish Hill 7.5' Q) 177 Comment
  UCR184937  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2007-4-26 11833 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
  UCR197346  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2008-4-11 13242 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
  UCR206822  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2009-5-24 14763 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 0.2 miles east of the Cosumnes River and CA-49 288 Comment
  UCR122473  Erodium brachycarpum George K. Helmkamp, E. A. Helmkamp 1998-5-20 3895 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
  UCR238599  Erodium brachycarpum George K. Helmkamp, E. A. Helmkamp 2012-3-31 18649 A Placer Sacramento Valley, along CA-193, 0.1 mile west of its junction with Sierra College Blvd. 88 Comment
  UCR161250  Erodium moschatum George K. Helmkamp, E. A. Helmkamp 2005-2-9 8881 A 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
  UCR122555  Erysimum capitatum var. capitatum George K. Helmkamp 2002-4-20 7458 San Luis Obispo Central Coast, Los Osos, 0.2 mile northwest of Monarch Lane 9 Comment
  UCR173708  Erysimum cheiranthoides George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10697 El Dorado Northern Sierra Nevada Mountains, Ice House Road at the turnoff to Loon Lake 1982 Comment
  SEINET13262671 Image available Erythranthe guttata George K. Helmkamp, Mary Alice Barnes 2013-1 20635 Calaveras Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs 279 Comment
  UCR130644  Eschscholzia californica George K. Helmkamp, E. A. Helmkamp 1999-4-18 4701 San Diego Between Lake Henshaw & Matagual Valley, Barrett Hill Rd off of Hwy-79, c. 6.5 mi SW of Warner Hot Springs. 838 Comment
  UCR140980  Eschscholzia californica George K. Helmkamp 2004-4-23 8517 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd, 12.9 mi from Hwy-Calif. Hwy 154 at San Olivos jct. 1159 Comment
  UCR161360  Eschscholzia californica George K. Helmkamp, E. A. Helmkamp 2005-3-8 9078 San Luis Obispo Central Coast Hills., Irish Hills; crest of Prefumo Canyon Road, 5.2 mi west of Los Osos Valley Road 409 Comment
  UCR205154  Eschscholzia californica George K. Helmkamp, E. A. Helmkamp 2008-10-30 14298 Sacramento Southern Sacramento Valley, junction of Alta Mesa Road and Twin Cities Road (Highway E-13), northeast of Herald 15 Comment
  VVC358  Eschscholzia californica G. K. Helmkamp 1996-6-11 1123 San Bernardino San Bernardino Mtns, SW end of Baldwin Lake 1433 Comment
  UCR93395  Eschscholzia glyptosperma George K. Helmkamp 1993-4-24 s.n. San Bernardino Northeastern Mojave Desert, along Smith Talc Road, c. 9 miles east of Tecopa [Pass?, Inyo Co.; probably after Sm. T. Rd. transition to Excelsior Mine Rd.] 1067 Comment
  UCR184826  Eschscholzia lobbii George K. Helmkamp, E. A. Helmkamp 2007-3-14 11624 Sacramento Sacramento Valley; edge of Sierra Nevada foothills, Latrobe Rd at Michigan Bar Rd, about 3.5 mi west of Latrobe and 0.3 mi west of the El Dorado County line 146 Comment
  UCR104030  Eschscholzia parishii George K. Helmkamp 1998-4-4 3160 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
  UCR200857  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2008-9-15 14101 Placer Northern Sierra Navada Mountains, along Foresthill Road 26 miles northeast of the city of Forest Hill 1954 Comment
  UCR231852  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2010-8-14 16768 Placer Northern Sierra Nevada Mountains, Deadwood Road, 1.2 miles south of its junction wih Forest Hill Road 1564 Comment
  UCR241343  Eucephalus breweri George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19826 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 0.5 mile north of Robinson Flat Campground, c. 26 miles NE of Foresthill, Tahoe National Forest 2043 Comment
  UCR50450  Eucrypta micrantha George K. Helmkamp 1988-2-28 24 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
  UCR235502  Euphorbia crenulata George K. Helmkamp, E. A. Helmkamp 2012-5-11 18943 Placer Northern Sierra Nevada Mountains Foothills, Finning Mill Road, 1.2 miles north of its junction with Forest Hill Road 1104 Comment
  UCR188567  Euphorbia maculata George K. Helmkamp, E. A. Helmkamp 2007-10-7 13063 Butte Northern Sacramento Valley, East Gridley Road at the west edge of the Feather River bridge 27 Comment
  UCR217274  Euphorbia oblongata George K. Helmkamp, E. A. Helmkamp 2010-5-4 15956 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
  UCR242614  Euphorbia oblongata George K. Helmkamp, E. A. Helmkamp 2011-6-17 17563 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 0.8 mile northeast of CA-26 at West Point 977 Comment
  UCR250340  Euphorbia oblongata George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20701 Calaveras Northern Sierra Nevada Mountains Foothills, North side of Mokelumne River, west of Big Bar Road and the CA-49 bridge 198 Comment
  UCR241996  Euphorbia ocellata George K. Helmkamp, E. A. Helmkamp 2012-9-7 19767 Amador Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of the junction with Fiddletown Road at Plymouth 299 Comment
  UCD142450  Euphorbia peplus G. K. Helmkamp; E. A. Helmkamp 2007-3-5 11595 El Dorado Northern Sierra Nevada Mountains; Lak Oaks Mobile Home Park; Pleasant Valley Road and Patterson Dr., east end of Diamond Springs. 524 Comment
  UCR231090  Euphorbia serpillifolia subsp. serpillifolia George K. Helmkamp, E. A. Helmkamp 2010-8-7 16728 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring 2136 Comment
  UCR234543  Euphorbia serpillifolia subsp. serpillifolia George K. Helmkamp, E. A. Helmkamp 2011-8-19 18156 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 2.6 miles north of its junction with Tamarack Road 2436 Comment
  UCR104822  Euphorbia setiloba George K. Helmkamp 1998-4-4 3161 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
  CLARK-A1045-862  Euphorbia vallis-mortae George K. Helmkamp 1977-6-11 Kern Kern River Onyx 7.5'Q Comment
  CAS-BOT-BC520330  Eurybia integrifolia George K. Helmkamp; Amy Barnes 2012-8-12 19602 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.8 mi SE of jct with CA-88 and beside Woods Creek 2285 Comment
  SD247309  Eurybia integrifolia George K. Helmkamp, E. A. Helmkamp 2013-8-2 22099 Alpine Northern Sierra Nevada Mountains: along CA-88, Carson Pass Highway, 1.6 miles east of Caples Lake dam. 2486 Comment
  SEINET1004406  Fabaceae George K. Helmkamp 2004-1 8645 San Luis Obispo Central Coast: Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd., 0.6 mi E of Hwy CA-1. 91 Comment
  UCR238439  Festuca bromoides George K. Helmkamp, E. A. Helmkamp 2012-4-4 18692 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR238574  Festuca bromoides George K. Helmkamp, E. A. Helmkamp 2012-3-31 18647 Placer Sacramento Valley, along CA-193, 0.1 mile west of its junction with Sierra College Blvd. 88 Comment
  SD237267  Festuca microstachys G. K. Helmkamp, E. A. Helmkamp 2010-4-24 15943 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
  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
  UCR101012  Festuca myuros var. hirsuta George K. Helmkamp, E. A. Helmkamp 1998-4-8 3245 San Luis Obispo Soda Lake Rd at Arrowbear Trail, vic. of California Valley, c. 5 mi. NW of Soda Lake 610 Comment
  UCR217850  Festuca myuros var. myuros George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16110 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 4.7 rd. miles east of its junction with Perry Creek road, air 3.9 mi. ESE (98 deg. ) of Fair Play 1082 Comment
  RSA0106513  Festuca perennis George K. Helmkamp, Amy Barnes 2014-3-21 22622 Sutter Sacramento Valley: 2.8 miles WSW (257 deg ) of Sutter, along CA-20 at the junction with Morehead Rd. 11 Comment
  UCR206935  Festuca rubra George K. Helmkamp, E. A. Helmkamp 2009-6-10 14931 Shasta Southern Cascade Range, along CA-44, 1.2 miles west of Shingletown 936 Comment
  SEINET239050 Image available Festuca viridula G. K. Helmkamp, E. A. Helmkamp 1999-6-30 5097 Placer Northern Sierra Nevadas: Soda Springs Road .9 miles south of Donner Pass Road approaching Ice Lakes. 2104 Comment
  UCD127501  Foeniculum vulgare G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12563 El Dorado Foothills, northern Sierra Nevada Mountains; Rock Creek Road, 7.1 miles east of its junction with CA-193. 567 Comment
  UCR146979  Foeniculum vulgare George K. Helmkamp, E. A. Helmkamp 2004-10-8 8846 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCR194709  Foeniculum vulgare George K. Helmkamp, E. A. Helmkamp 2007-10-28 13113 Sutter Sacramento Valley, along Nicolaus Road at Coon Creek, 0.9 mi west of Placer County line 18 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
  UCR250627  Fragaria vesca George K. Helmkamp, Mary Alice Barnes 2013-4-24 20406 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 1.9 miles east of its junction with CA-26 in West Point 652 Comment
  UCR122283  Fraxinus dipetala George K. Helmkamp, E. A. Helmkamp 2002-4-15 7378 Santa Barbara Sierra Madre Mountains, Miranda Pine Rd., 4.3 mi SE of Calif. Hwy 166 915 Comment
  UCR115578  Fritillaria affinis George K. Helmkamp, E. A. Helmkamp 2000-4-20 5402 San Luis Obispo Central Coast, Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
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Jun 24 2012
  UCR161345  Fritillaria affinis George K. Helmkamp, E. A. Helmkamp 2005-3-8 9051 San Luis Obispo Coastal Hills, Prefumo Canyon, north side of Irish Hills; 2.2 mi west of Los Osos Valley Road 122 Comment
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Jun 24 2012
  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
  UCR130694  Galium aparine George K. Helmkamp, E. A. Helmkamp 1999-4-17 4689 San Diego Dulzura Creek Watershed., Honey Springs Rd 1.9 mi west of California-94 366 Comment
  UCR233064  Galium aparine George K. Helmkamp, E. A. Helmkamp 2011-5-12 17279 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR249146  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20760 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  UCR249570  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20855 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 mile south of its junction with US-50 in Kyburz 1364 Comment
  UCR250272  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2013-4-13 20335 Placer Northern Sierra Nevada Mountains Foothills, Cramer Road at the junction with CA-49, north of Auburn 412 Comment
  UCR250690  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20195 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26, 5.1 miles southwest of Mokelumne Hill 393 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
  UCR222570  Galium murale George K. Helmkamp, E. A. Helmkamp 2010-4-17 15881 El Dorado Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 1.9 miles southwest of its junction with CA-49 near Pilot Hill 314 Comment
  UCR107369  Galium porrigens var. porrigens George K. Helmkamp, E. A. Helmkamp 1998-5-16 3724 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  RSA739924  Galium sparsiflorum George K. Helmkamp, E. A. Helmkamp 2007-6-6 12277 El Dorado Northern Sierra Nevada Mtns.; junction of bonetti Rd. and Mormon Emigrant Trail, east of Jenkinson Lake (Sly Park 7.5' Q.) 1226 Comment
  SEINET4691689  Galium sparsiflorum subsp. sparsiflorum George K. Helmkamp, E. A. Helmkamp 2010-1 16781 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
  UCR134386  Gamochaeta ustulata George K. Helmkamp 2003-9-19 8156 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  RSA750447  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2008-8-1 13959 El Dorado Forestry Route 42 at Silver Creek, 0.2 mile west of the junction with Wright s Lake Road 2021 Comment
  SD247467  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2013-6-15 20862 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz. 1454 Comment
  SEINET13276691 Image available Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Amy Barnes 2014-1 22980 El Dorado Northern Sierra Nevada Mountains: north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road (Robbs Peak 7.5' Q.) 1728 Comment
  SEINET2441344  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2009-8-6 15404 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.). 1590 Comment
  UCD103645  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11114 Alpine Northern Sierra Nevada Mountains. Wood's Lake Road, 0.3 mile N of the parking area for Wood's Lake. Wood's Creek. 2509 Comment
  UCD103647  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-9-12 11386 Alpine Northern Sierra Nevada Mountains, along Hwy CA-89, 1.5 miles east of the El Dorado county line, general vicinity of Luther Pass. 2186 Comment
  UCR179220  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2006-9-12 11370 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
  UCR206776  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Amy Barnes 2009-7-8 15137 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
  UCR233301  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2011-9-1 18222 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR237288  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2012-7-2 19312 Amador Northern Sierra Nevada Mountains, Bear River Road, 0.1 mile east of the south end of the dam of Lower Bear River Reservoir 1776 Comment
  UCR257762  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19695 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
  UCR257872  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19539 Amador Northern Sierra Nevada Mountains, Plasse Road, 0.4 mile south of its junction with CA-88, SW of Silver Lake 2262 Comment
  UCR190181  Gayophytum heterozygum George 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
  UCR230123  Gayophytum heterozygum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17808 Tuolumne Northern Sierra Nevada Mountains Foothills, Forest Route 5N14, 1.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1143 Comment
  UCR13913  Gayophytum ramosissimum George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at Benton Crossing, just north of Crowley Lake 2134 Comment
  RSA0115747  Gazania linearis George K. Helmkamp, Amy Barnes 2014-3-21 22606 Sutter Sacramento Valley: Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian. 13 Comment
  UCR256512  Genista monspessulana George K. Helmkamp, Amy Barnes 2014-5-8 22863 El Dorado Sierra Nevada Mountains Foothills, along CA-49 near Ramales Lane, c. 0.7 mile north of Union Mine Road junction 282 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
  UCR189431  Gentianopsis simplex George K. Helmkamp, E. A. Helmkamp 2007-8-16 12775 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail at Leek Spring meadow, about 2 miles northwest of CA-88 2238 Comment
  UCR103291  Geraea canescens George K. Helmkamp 1998-3-30 3004 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR124082  Geraea canescens George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5359 San Bernardino Colorado River, Beside the California-Arizona border near Topock, AZ. 152 Comment
  UCD103279  Geranium bicknellii G. K. Helmkamp; E. A. Helmkamp 2007-5-1 11917 El Dorado Northern Sierra Nevada Mountains: along Hwy CA-49. 6.1 miles northwest of Placerville. 454 Comment
  RSA0028448  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2009-5-4 14596 El Dorado Sly Park Road, 0.3 miles southwest of its junction with Mormon Emigrant Trail 1067 Comment
  UCD103347  Geranium dissectum G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11878 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR233360  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-4-1 17117 Colusa Western Sacramento Valley, along Maxwell Road, 2.1 miles east of Maxwell, near Delevan Wildlife Refuge 23 Comment
  UCR258230  Geranium dissectum George K. Helmkamp, Amy Barnes 2013-3-28 20248 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  UCR61731  Geranium dissectum George K. Helmkamp 1989-4-17 s.n. San Luis Obispo Irish Hills, at the crest of Prefumo Canyon Road 366 Comment
  UCR88338  Geranium dissectum George K. Helmkamp 1995-6-20 95 2 17 San Luis Obispo Central Coast, Bear Creek Ranch, 6 miles SE of Los Osos on Clark Valley Road 400 Comment
  CAS-BOT-BC174787  Geranium molle G. K. Helmkamp; E. A. Helmkamp 2008-3-22 13225 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills: along CA-26, 3.7 miles southwest of Valley Springs at Lime Creek Road 143 Comment
  UCD103420  Geranium molle G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10348 Amador Northern Sierra Nevada foothills: ESE of Sacramento; 3.2 mi. E of Pine Grove along CA Hwy 88. 841 Comment
  UCR173278  Geranium molle George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10442 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
  UCR218160  Geranium molle George K. Helmkamp, Amy Barnes 2010-5-7 15991 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
  UCR232262  Geranium molle George K. Helmkamp, E. A. Helmkamp 2011-3-29 17109 Calaveras San Joaquin Valley, along Warren Road near Long Horn Ct., 0.4 mile north of junction with CA-26 56 Comment
  SEINET3246026  Geranium pusillum G. K. Helmkamp, E. A. Helmkamp 2007-1 11706 Placer Foothills, Northern Sierra Nevada Mountains: Forest Hill Road, 0.9 mile east of its junction with CA-49 at the bridge of the junction of American River forks. 287 Comment
  UCR256484  Geranium robertianum George K. Helmkamp, Amy Barnes 2014-5-8 22837 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
  UCR129969  Gilia achilleifolia George K. Helmkamp, E. A. Helmkamp 2000-4-24 5554 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
  UCR106422  Gilia angelensis George K. Helmkamp, A. C. Sanders 1997-3-15 1487 Riverside Skinner Lake, Grassland at base of Bachelor Mtn. and adjoining chapararal. 488 Comment
  UCR116010  Gilia angelensis George K. Helmkamp, E. A. Helmkamp 1997-3-5 1335 Riverside San Bernardino Mtns./San Gorgonio Pass, Cabazon, 0.5 mi north of I-10 on Millard Pass Rd. 564 Comment
  UCR76725  Gilia cana subsp. speciosa George K. Helmkamp 1993-4-24 s.n. San Bernardino Eastern Mojave Desert, Shadow Valley, at the junction of Cima [Exselsior Mine] Road and Kingston Road, between I-15 and the Kingston Mountains 1220 Comment
  SEINET272170  Gilia capitata subsp. abrotanifolia G. K. Helmkamp, E. A. Helmkamp 1997-4-24 1660 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
  SEINET11261544  Gilia capitata subsp. mediomontana George Helmkamp, Elizabeth Helmkamp 2013-6-11 20828 Placer Northern Sierra Nevada Mountains Foothills at the junction of Yankee Jim's Road and Shirttail Canyon Road, NW of Foresthill.; 0 463 Comment
  UCD117712  Gilia capitata subsp. mediomontana G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12585 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
  UCR207858  Gilia capitata subsp. mediomontana George K. Helmkamp, E. A. Helmkamp 2009-4-22 14563 Placer Sierra Nevada Mountains Foothills, Forest Hill Road 1.9 mile east of its junction with CA-49 and the North and Middle Forks of the American River 399 Comment
  UCR240925  Gilia capitata subsp. mediomontana George K. Helmkamp, E. A. Helmkamp 2012-6-26 19272 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
  UCR197333  Gilia capitata subsp. pedemontana George K. Helmkamp, E. A. Helmkamp 2008-5-8 13426 Amador Sierra Nevada Mountains Foothills, along CA-26, 1.0 mile west of the Calaveras County line 709 Comment
  CLARK-A1045-365  Gilia latiflora George K. Helmkamp 1977-6-12 F Kern Kelso Creek 5 miles southeast of Weldon; ; Onyx 7.5'Q 1219 Comment
  SEINET11266065  Gilia leptalea George Helmkamp, E. A. Helmkamp 2013-7-10 21033 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail at the junction with Pilliken Road (Leek Spring Hill 7.5' Q); 0 1823 Comment
  UCR175727  Gilia leptalea George K. Helmkamp, E. A. Helmkamp 2006-7-10 10918 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
  RSA781945  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2010-7-13 16535 Alpine Woods Lake Road, 0.1 mile south of its junction with CA-88 2492 Comment
  SEINET11266087  Gilia leptalea subsp. bicolor George Helmkamp, E. A. Helmkamp 2011-9-13 18250 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 (231/4) of Alder Hill (Tragedy Spring 7.5' Q.); 0 2274 Comment
  SEINET11267715  Gilia leptalea subsp. bicolor George 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 (Caples Lake 7.5' Q.); 0 2486 Comment
  UCR207117  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2009-7-16 15224 Placer Sierra Nevada Mountains, Forest Hill Road, 26.1 miles northeast of the city of Foresthill, c. 3/4 mi. NW of Sailor Flat 2020 Comment
  UCR233434  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2011-9-13 18250 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
  UCR242586  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2010-9-1 16893 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  UCR190215  Gilia leptalea subsp. leptalea George 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 1573 Comment
  UCR229567  Gilia leptalea subsp. leptalea George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18053 Calaveras Northern Sierra Nevada Mountains, Black Springs Road [Forest Route 7N23], 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR201745  Gilia sinistra subsp. sinistra George K. Helmkamp, E. A. Helmkamp 2008-8-1 13947 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 2.2 miles south of the entrance to Wright's Lake 2070 Comment
  CLARK-A1045-562  Gilia splendens George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains dirt road [unpaved State Highway 173] between Lake Arrowhead and Mojave River Forks Regional Park; ; Lake Arrowhead 7.5' Q 1523 Comment
  UCR26124  Gilia splendens George K. Helmkamp 1982-5-23 s.n. San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, Big Morongo Canyon. Roadside bank about 0.25 mi. below the entrance to the Nature Conservancy Preserve, where the canyon begins Comment
  UCR101136  Gilia stellata George K. Helmkamp, E. A. Helmkamp 1998-3-19 2953 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 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
  RSA748978  Gilia tricolor subsp. diffusa George K. Helmkamp, E. A. Helmkamp 2007-4-23 11808 Amador junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 Comment
  UCR208318  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2009-3-26 14477 Amador San Joaquin Valley, along CA-88, 0.4 mile northeast of the San Joaquin Co. line 81 Comment
  UCD85120  Glyceria elata G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12785 El Dorado Northern Sierra Nevada Mountains. Ice House Road. 21.3 miles north of CA-50 at Robbs Hut Road. 2078 Comment
  RSA755551  Glyceria striata George K. Helmkamp, E. A. Helmkamp 2009-8-19 15508 El Dorado Wright's Lake Road, 8.6 miles north of its upper junction with Ice House Road 1785 Comment
  UCR123170  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2002-4-19 7615 San Luis Obispo Central Coast, 3.2 mi north of Piedras Blancas Lighthouse along CA Hwy 1 15 Comment
  UCR134408  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2001-4-29 6568 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
  UCR160561  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2005-6-7 9547 San Luis Obispo Outer South Coast Ranges, along Huasna Road, 1.3 mile west of Huasna Townsite Road 305 Comment
  UCR158192  Gnaphalium canescens subsp. beneolens George K. Helmkamp 2004-6-12 8630 Santa Barbara Central Coast Range, Purissima Hills. Harris Grade Rd at '28.04 mi', about 3 mi south of CA Hwy 135 229 Comment
  UCR170438  Gnaphalium canescens subsp. beneolens George K. Helmkamp, Elizabeth Helmkamp 2005-10-29 10005 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
  UCR178662  Gnaphalium canescens subsp. beneolens George K. Helmkamp, E. A. Helmkamp 2006-9-7 11343 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 0.4 mile north of its junction with Wentworth Springs Road 1701 Comment
  UCR189433  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2007-8-16 12773 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 0.9 mile northeast of the junction with Bear River Reservoir Road 2076 Comment
  UCR189429  Gnaphalium luteoalbum George K. Helmkamp, E. A. Helmkamp 2007-8-29 12833 Yuba Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 0.5 mile south of Camptonville 817 Comment
  SBBG126178  Gnaphalium palustre G. K. Helmkamp with E. A. Helmkamp 2009-8-19 15510 El Dorado Wright's Lake Rd, 8.6 mi N of its upper jct with Ice House Rd 1785 Comment
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Mar 23 2014
  SEINET4560750  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2011-1 18334 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
  UCR122557  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2001-4-27 6536 Kern San Joaquin Valley, Enos Lane Rd., 1.9 mi south of Calif. Hwy 119, NE of Taft 61 Comment
  HSC104170  Grindelia hirsutula var. davyi G. K. Helmkamp, E. A. Helmkamp 2012-10-1 19946 El Dorado Eastern Sacramento Valley: Southeast end of El Dorado Hills; Windfield Way just south of its junction with White Rock Rd. 168 Comment
  RSA0035737  Grindelia hirsutula var. davyi George K. Helmkamp, Elizabeth A. Helmkamp 2013-5-24 20685 Calaveras Whiskey Slide Road, just east of West Murray Creek Road, c. 4.7 miles SE of Jesus Maria Road 677 Comment
  UCR206757  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2009-6-25 15053 El Dorado Sierra Nevada Mountains Foothills, Forbay Road, 1.5 miles north of the crossing of the South Fork American River, c. 9 miles north of Pollock Pines 857 Comment
  UCR219266  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2009-9-5 15587 Butte Sacramento Valley, Lower Honcut Road, 0.9 rd. mi. west of Honcut, 7.8 mi. SE (111 deg. ) of Gridley 34 Comment
  UCR250654  Grindelia hirsutula var. davyi George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20685 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
  UCR79288  Gutierrezia sarothrae George K. Helmkamp 1993-9-11 35- 01 San Bernardino San Bernardino Mtns., 14.4 mi up Burns Canyon from junction of Pioneertown & Pipes Canyon 2073 Comment
  UCR190476  Hackelia floribunda George K. Helmkamp, E. A. Helmkamp 2007-8-4 12687 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
  SD243108  Hackelia micrantha George K. Helmkamp, E. A. Helmkamp 2010-8-7 16717 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) 2136 Comment
  UCR231015  Hackelia micrantha George K. Helmkamp, E. A. Helmkamp 2010-8-7 16717 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring 2136 Comment
  UCR245721  Hackelia micrantha George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22209 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  UCR234593  Hackelia mundula George K. Helmkamp, E. A. Helmkamp 2011-8-19 18125 Alpine Northern Sierra Nevada Mountains, Tamarack Road, 0.1 mile east of its junction with Blue Lakes Road 2485 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
  CLARK-A1045-753  Hedeoma nana subsp. californica George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains steep limestone slope 1.5 miles east of Winters Pass; ; Clark Mt. 15'Q 1127 Comment
  UCR122127  Hedypnois cretica George K. Helmkamp 2002-4-21 7482 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 11.2 mi east of Cambria 396 Comment
  UCR130073  Helenium bigelovii George K. Helmkamp, E. A. Helmkamp 2001-7-7 6900 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
  SD243092  Helianthella californica var. nevadensis George K. Helmkamp, E. A. Helmkamp 2010-8-20 16820 El Dorado Northern Sierra Nevada Mountains near abandoned Iron Mountain ski resort, road spur parallel to Mormon Emigrant Trail about 0.2 mile west of its junction with CA-88 (Tragedy Spring 7.5'Q) 2238 Comment
  CDA25242  Helianthus annuus G. K. Helmkamp, E. A. Helmkamp 2007-10-13 13093 San Joaquin Northern San Joaquin Valley; Along Highway CA-88, 1.0 mile southwest of Clements at Disch Road. Comment
  UCR209581  Helianthus annuus George K. Helmkamp, E. A. Helmkamp 2009-8-24 15527 Amador Northern San Joaquin Valley, Carbondale Road, 1.2 miles south of its junction with Lambert Road 101 Comment
  UCR179821  Helianthus annuus subsp. lenticularis George K. Helmkamp, E. A. Helmkamp 2006-10-20 11551 El Dorado Northern Sierra Nevada Mountains Foothills, 0.6 mile northwest of Pleasant Valley along Pleasant Valley Road 756 Comment
  RSA749728  Helianthus bolanderi George K. Helmkamp, E. A. Helmkamp 2008-10-6 14219 Sutter Pass Road, south side of Sutter Buttes, 4.7 miles west of Sutter 56 Comment
  RSA615443  Heliomeris multiflora var. nevadensis George K. Helmkamp 1997-9-30 2453 Inyo White Mountains. 8 miles East of US 395 on CA Highway 168 out of Big Pine. 2103 Comment
  UCR232611  Heliotropium europaeum George K. Helmkamp, E. A. Helmkamp 2011-10-8 18368 Glenn Northern Sacramento Valley, along CA-45, 1.2 miles north of Princeton 44 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
  RSA0081164  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2006-10-6 11475 Amador Along Calif. Hwy 49, 1.1 miles south of Plymouth. 314 Comment
  UCR230746  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2010-10-20 17042 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
  RSA0011954  Heracleum maximum George K. Helmkamp, E. Helmkamp 2011-9-13 18255 El Dorado 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
  SD148265  Heracleum maximum G. K. Helmkamp, E. A. Helmkamp 2001-6-2 6788 San Mateo Central California coast; Purissima Creek Road, east of Half Moon Bay at Purissima Creek, 3.2 miles east of California Highway 1. 244 Comment
  UCR229481  Heracleum maximum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17885 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
  UCR101118  Hesperocallis undulata George K. Helmkamp, E. A. Helmkamp 1998-3-19 2943 Imperial Sonoran (Colorado) Desert, Imperial Dam area, along Ferguson Rd, 1.5 mi. north of Hwy S-24. 91 Comment
  RSA614694  Heterodraba unilateralis George K. Helmkamp, E. A. Helmkamp 1997-3-7 1394 Kern San Emidgio Ranch, SE portion. 1494 Comment
  UCR206401  Heteromeles arbutifolia George K. Helmkamp, E. A. Helmkamp 2009-3-11 14376 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR182286  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2006-10-8 11484 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
  UCR235403  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2011-11-28 18486 Sutter Sacramento Valley, Worth Road, 0.2 mile east of its junction with Garden Highway, 4 miles southwest of Nicolaus 14 Comment
  UCR191136  Heuchera micrantha George K. Helmkamp, E. A. Helmkamp 2007-6-8 12300 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 2.0 miles south of Mormon Emigrant Trail 1189 Comment
  UCR89412  Heuchera rubescens George K. Helmkamp 1990-8-3 s.n. Mono Sierra Nevada Mountains, Midway gondola stop up Mammoth Mountain 2927 Comment
  SD254537  Hieracium albiflorum George K. Helmkamp, Amy Barnes 2014-8-11 23002 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 1.7 miles south of Crystal Basin Information Station (Riverton 7.5'Q) 1609 Comment
  UCR232623  Hieracium albiflorum George K. Helmkamp, E. A. Helmkamp 2010-7-28 16635 Placer Northern Sierra Nevada Mountains, Forest Route 10 (Sugar Pine Rd.), 0.8 mile north of its junction with Forest Hill Road, 8.2 miles NE (34 deg. ) of Foresthill 1311 Comment
  UCR233235  Hieracium albiflorum George K. Helmkamp, E. A. Helmkamp 2011-7-17 17738 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
  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
  SD144115  Hilaria rigida G. K. Helmkamp, E. Helmkamp 1998-1-24 Imperial Gravel Rd S of Hwy I-8. Rocky hills at W edge of Fort Yuma Indian Reservation 60 Comment
  UCR257766  Holcus lanatus George K. Helmkamp, Amy Barnes 2014-7-28 22943 El Dorado Sierra Nevada Mountains Foothills, Lake Walton beside Balderston Road; 1/4 mile south of Wentworth Springs Road 966 Comment
  UCR103959  Holocarpha heermannii George K. Helmkamp, E. A. Helmkamp 1997-6-23 2097 Monterey Central Coast, small side tributary off Willow Creek [Los Burros] Rd., c. 1 mi. north of Gorda & c. 1.7 mi from US Hwy 1 274 Comment
  JEPS119419  Holocarpha virgata subsp. virgata G. K. Helmkamp, E. A. Helmkamp 2009-8-24 15523 Amador Sierra Nevada Mountains Foothills, along CA-49 at the junction with Fiddletown Road in the city of Plymouth Comment
  SD197690  Holocarpha virgata subsp. virgata G. K. Helmkamp, E. A. Helmkamp 2008-10-2 14188 Sacramento Sacramento Valley: Latrobe Road, 4.9 miles west of Latrobe and just east of the El Dorado County line. 152 Comment
  UCR196768  Holodiscus discolor George K. Helmkamp, E. A. Helmkamp 2008-6-3 13582 El Dorado Sierra Nevada Mountains, Forbay Road, 7.1 miles northwest of CA-50 (road junction in Pollock Pines), no-outlet road leading to the South Fork of the American River 716 Comment
  UCR206866  Holodiscus discolor George K. Helmkamp, E. A. Helmkamp 2009-6-25 15046 El Dorado Sierra Nevada Mountains Foothills, Forbay Road at South Fork American River, 7.6 miles north of junction with Pony Express Trail in Pollock Pines 579 Comment
  UCR252983  Holodiscus discolor George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 20985 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam for Lower Bear River Reservoir 1784 Comment
  UCR15439  Holodiscus microphyllus George K. Helmkamp 1977-9-5 s.n. El Dorado Sierra Nevada Mtns., Grass Lake, near Luther Pass 2348 Comment
  SEINET11261556  Holodiscus microphyllus var. microphyllus George Helmkamp, E. A. Helmkamp 2010-9-23 16959 El Dorado Northern Sierra Nevada Mountains on Forest Route 31, 3.9 miles north of its junction with Peavine Ridge Road and Round tent Canyon Road.; 0 1457 Comment
  UCR218944  Holozonia filipes George K. Helmkamp, E. A. Helmkamp 2009-8-28 15542 Sacramento Northern Sacramento Valley, along Latrobe Road, 3.6 miles west of the El Dorado County line, 1 mi. NNW of Rancho Murieta 61 Comment
  UCR140074  Hordeum murinum subsp. leporinum George K. Helmkamp 2004-4-1 8419 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
  UCR172651  Hordeum murinum subsp. leporinum George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10196 Placer Northern Sierra Nevada Foothills, Forest Hill Road, 2.5 mi east of its junction with Calif. Hwy 49. North side of the middle fork of the American River, NE of Auburn 274 Comment
  UCR15507  Horkelia George K. Helmkamp 1978-6-3 s.n. San Luis Obispo Central Coast, Montana de Oro State Park Comment
  CLARK-A1045-1111  Horkelia fusca subsp. parviflora George K. Helmkamp 1977-9-1 VI Alpine Sierra Nevada 2 miles east of Luther Pass, corner of US Highway 88 and US Highway 89; roadside; 7300 ft; Freel Peak 7.5'Q Comment
  UCR215985  Horkelia tridentata subsp. tridentata George K. Helmkamp, Amy Barnes 2009-7-12 15178 Placer Sierra Nevada Mountains, along Foresthill Road 10.3 miles northeast of the town of Foresthill 1370 Comment
  CAS-BOT-BC536248  Horkelia tridentata var. tridentata G. K. Helmkamp; E. A. Helmkamp 2008-6-23 13717 Amador Dufrene Road, 0.1 mile south of its junction with CA-88, between Mormon Emigrant Trail and Hamms Station, Northern Sierra Nevada Mountains 2075 Comment
  RSA782549  Horkelia tridentata var. tridentata George K. Helmkamp, Amy Barnes 2009-7-12 15178 Placer Along Foresthill Road 10.3 miles northeast of the town of Foresthill 1370 Comment
  SD143833  Horsfordia newberryi G. K. Helmkamp, E. A. Helmkamp 1998-3-19 2959 Imperial Little Picacho Wash along Picacho Road, 2.5 miles south of Picacho State Recreation Area. 152 Comment
  SEINET3002099 Image available Horsfordia newberryi George K. Helmkamp, E. A. Helmkamp 1998-1 2959 Imperial Little Picacho Wash along Picacho Rd, 2.5 mi. S of Picacho State Recreation Area 152 Comment
  UCD106182  Hosackia oblongifolia var. oblongifolia G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12757 Amador Northern Sierra Nevada Mountains, along the south side of Bear River Reservoir just east of the spillway. 1777 Comment
  CLARK-A1045-1046  Hulsea vestita subsp. callicarpha 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-A1045-443  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
  UCR257824  Hypericum anagalloides George K. Helmkamp, Amy Barnes 2012-8-19 19647 El Dorado Northern Sierra Nevada Mountains, junction of Ice House Road and entrance to campground on the south end of Loon Lake 1980 Comment
  UCR173740  Hypericum concinnum George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-14 10709 Placer Northern Sierra Nevada Mountains foothills, 0.2 mile north of Forest Hill Road on Lake Clementine Rd., area northeast of Auburn on Forest Hill Divide 488 Comment
  SD237477  Hypericum perforatum G. 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 (74a^z) of Pollock Pines (Riverton 7.5'Q) 1641 Comment
  UCR170638  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2005-8-9 9801 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
  UCD110373  Hypericum perforatum subsp. perforatum G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-3 10610 El Dorado Northern Sierra Nevada foothills: city park at the east end of Shingle Springs, along Pleasant Valley Road. 433 Comment
  SD148235  Hypochaeris glabra G. K. Helmkamp, E. A. Helmkamp 2000-6-15 5683 San Luis Obispo Coastal strand between Los Osos and sand dunes west of the end of Howard St. 14 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
  UCR118261  Hypochaeris glabra George K. Helmkamp, E. A. Helmkamp 2000-4-24 5506 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
  UCR207892  Hypochaeris glabra George K. Helmkamp, E. A. Helmkamp 2009-5-12 14683 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  UCR218189  Hypochaeris glabra George K. Helmkamp, E. A. Helmkamp 2010-5-31 16159 Amador Sierra Nevada Mountains Foothills, Church Street, becoming Sutter Creek-Volcano Road, 0.2 mile east of the village of Sutter Creek 402 Comment
  UCR197658  Hypochaeris radicata George K. Helmkamp, E. A. Helmkamp 2008-5-29 13526 Calaveras Sierra Nevada Mountains, along the north side of CA-4 (Ebbetts Pass Rd.) at Avery 1024 Comment
  UCR207667  Hypochaeris radicata George K. Helmkamp, E. A. Helmkamp 2009-4-21 14543 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR121507  Iris douglasiana George K. Helmkamp, E. A. Helmkamp 2000-6-19 5779 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 Comment
  UCR250702  Iris hartwegii subsp. hartwegii George K. Helmkamp, Mary Alice Barnes 2013-5-10 20540 El Dorado Northern Sierra Nevada Mtns. Foothills, Donaldson Trailhead along Volcanoville Road, 0.3 mile southeast of the junction with Bear Foot Road 1041 Comment
  UCR173350  Iris missouriensis George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10377 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR175278  Isatis tinctoria George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10702 El Dorado Northern Sierra Nevada Mountains, Ice House Road at the turnoff to Loon Lake 1982 Comment
  UCR14012  Isocoma acradenia var. acradenia George K. Helmkamp 1973-10-4 s.n. San Bernardino Mojave Desert, U.S. Hwy 40, at rest stop [28 miles] east of Barstow 549 Comment
  UCR132278  Isocoma menziesii var. vernonioides George K. Helmkamp 2003-8-31 8117 Santa Barbara Central Coast, Casmalia Hills, 4 mi west of Calif. Hwy 1 (south of Guadalupe) along Brown Road 183 Comment
  SD132254  Iva axillaris G. Helmkamp 1990-9-23 H 1 Modoc U. S. Highway 395, 13 miles north of Likely. 1340 Comment
  RSA781578  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-9-17 15632 El Dorado Pleasant Valley Road (CA-49) in Diamond Springs, 0.1 mile east of the junction with Patterson Drive 537 Comment
  UCR219139  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-9-17 15631 El Dorado Foothills, northern Sierra Nevada Mountains, Pleasant Valley Road (CA-49) in Diamond Springs, 0.1 mile east of the junction with Patterson Drive 537 Comment
  SD237486  Juglans hindsii G. K. Helmkamp, E. A. Helmkamp 2009-8-21 15518 El Dorado Sierra Nevada Mountains Foothills: along CA-49 (Coloma Road) 0.2 mile north of its junction with CA-193, north end of Placerville (Placerville 7.5'Q) 793 Comment
  UCR245711  Juncus George K. Helmkamp, Amy Barnes 2013-9-24 22352 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCR163025  Juncus balticus George K. Helmkamp, E. A. Helmkamp 2005-4-6 9320 Santa Barbara Outer south coast ranges, Santa Ynez Mountains; San Miguelito Road at mile 3.7, SSW of Lompoc 221 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
  UCR178649  Juncus bufonius George K. Helmkamp, E. A. Helmkamp 2006-9-7 11349 El Dorado Northern Sierra Nevada Mountains, Ice House Road. Robbs Valley near Robbs Hut junction 1720 Comment
  UCR229527  Juncus bufonius var. bufonius George K. Helmkamp, E. A. Helmkamp 2011-7-26 17879 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
  UCR230121  Juncus bufonius var. bufonius George K. Helmkamp, E. A. Helmkamp 2011-7-19 17811 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR257774  Juncus bufonius var. bufonius George K. Helmkamp, Amy Barnes 2012-8-19 19682 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
  UCR201915  Juncus chlorocephalus George K. Helmkamp, E. A. Helmkamp 2008-8-30 14045 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail 2.4 miles northwest of its junction with CA-88 2271 Comment
  UCR201917  Juncus chlorocephalus George K. Helmkamp, E. A. Helmkamp 2008-8-20 14035 Placer Northern Sierra Nevada Mountains, Soda Springs Road, 1.9 miles south of its junction with Donner Pass Road and beside (completely dry) Serena Creek 2107 Comment
  UCR209035  Juncus effusus var. exiguus George K. Helmkamp, E. A. Helmkamp 2009-8-19 15492 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  UCR189207  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2007-9-11 12937 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50 at Echo Summit 2256 Comment
  UCR237445  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2012-7-14 19422 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
  UCR261626  Juncus ensifolius George K. Helmkamp, Amy Barnes 2014-10-10 23140 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
  UCR209750  Juncus exiguus George K. Helmkamp, E. A. Helmkamp 2009-8-12 15431 Placer Sierra Nevada Mountains, Forest Hill Road, 20.5 miles northeast of the city of Foresthill 1662 Comment
Read comments
Mar 31 2011
  SD148279  Juncus mertensianus G. K. Helmkamp, E. A. Helmkamp 2000-7-18 5888 Mono Eastern Sierras, Humboldt-Toiyabe National Forest, 5.1 miles west of US-395 from Conway Summit and east of Trumbull Lake, on Virginia Lake Road; Dunderberg Peak 7.5' quad. Dry meadows. 2927 Comment
  UCR123118  Juncus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 1998-8-13 4413 Mono Eastern Sierra Nevada Mountains, Nunatak trail beside CA Hwy 120, about 1 mi south of Yosemite National Park entrance kiosk 2973 Comment
  UCR240940  Juncus tenuis George K. Helmkamp, E. A. Helmkamp 2012-6-26 19288 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek 1345 Comment
  CLARK-A1045-1117  Kalmia polifolia subsp. microphylla George K. Helmkamp 1977-9-1 V Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR157797  Keckiella breviflora subsp. breviflora George K. Helmkamp, E. A. Helmkamp 1998-6-29 4133 Kern Tehachapi Mtns, Water Canyon Rd., 1.9 miles south of SW end of city of Tehachapi at Highland Road 1494 Comment
  UCR206755  Keckiella breviflora subsp. breviflora George K. Helmkamp, E. A. Helmkamp 2009-6-25 15054 El Dorado Sierra Nevada Mountains Foothills, Forbay Road, 1.5 miles north of the crossing of the South Fork American River, c. 9 miles north of Pollock Pines 857 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
  SEINET4560813  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2011-1 18177 Placer Northern Sierra Nevada Mountains: Robinson Flat, 0.1 mile south of the campground at Forest Hill Road 2060 Comment
  UCR206083  Kelloggia galioides George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13917 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50 2043 Comment
  UCR232621  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2010-7-28 16638 Placer Northern Sierra Nevada Mountains, Forest Route 10 (Sugar Pine Rd.), 0.8 mile north of its junction with Forest Hill Road, 8.2 miles NE (34 deg. ) of Foresthill 1311 Comment
  UCD123877  Kickxia elatine G. K. Helmkamp; E. A. Helmkamp 2006-10-20 11548 El Dorado Northern Sierra Nevada Mountain Foothills; 0.6 mile northwest of Pleasant Valley along Pleasant Valley Road. 756 Comment
  UCR179560  Kickxia elatine George K. Helmkamp, E. A. Helmkamp 2006-9-29 11439 El Dorado Northern Sierra Nevada Mountains Foothills, Placerville outskirts; Calif. Hwy 49, 2 miles north of jct with US-50 549 Comment
  UCR217844  Kickxia elatine George K. Helmkamp, E. A. Helmkamp 2010-5-31 16182 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 3.3 miles east of the village of Sutter Creek 413 Comment
  UCR205140  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2008-10-14 14244 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCR257785  Lactuca serriola George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19510 Sierra Northern Sierra Nevada Mountains, Stampede Dam Road, 1.7 miles north of the Nevada County line, just east of Stampede Reservoir 1770 Comment
  UCR258186  Lactuca serriola George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20027 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
  UCR106685  Lamarckia aurea George K. Helmkamp, E. A. Helmkamp 1998-5-18 3757 Santa Clara Central Coast Range, Mt.Hamilton Rd (Calif. Hwy 130) east of San Jose; 15.2 mi from the W origin of the Hwy 610 Comment
  UCD125086  Lamium amplexicaule G. K. Helmkamp; E. A. Helmkamp 2007-3-22 11661 El Dorado Northern Sierra Nevada Mountains: Bucks Bar Road, 4.4 miles south of Pleasant Valley Road at the junction of Sand Ridge Road. 628 Comment
  UCR197392  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2008-3-18 13183 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
  UCR206874  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-3-5 14328 El Dorado Northern Sierra Nevada Mtns. Foothills, Happy Valley Cutoff road, 0.1 mile east of its junction with Mt. Aukum Road, south of Pleasant Valley 617 Comment
  UCR250665  Lamium amplexicaule George K. Helmkamp, Mary Alice Barnes 2013-4-25 20419 El Dorado Northern Sierra Nevada Mountains Foothills, Along CA-49/Coloma Rd., 0.1 mile south of its upper junction with Riverwood Drive, c. 2 miles south of Coloma 433 Comment
  UCR257605  Lamium amplexicaule George K. Helmkamp, Elizabeth Helmkamp 2014-1-25 22510 El Dorado Sierra Nevada Mountains Foothills, 1.15 air mi. ESE (106 deg. ) of Somerset, Grizzly Flat Road at the junction with Ladyhawke Way 748 Comment
  SD247447  Lamium purpureum George K. Helmkamp, E. A. Helmkamp 2013-4-13 20333 Placer Northern Sierra Nevada Mountains Foothills: Cramer Road at the junction with CA-49, north of Auburn (Auburn 7.5'Q) 412 Comment
  UCR101668  Langloisia setosissima subsp. punctata George K. Helmkamp, E. A. Helmkamp 1998-2-26 2778 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
  UCR121559  Lapsana communis George K. Helmkamp, E. A. Helmkamp 1999-6-28 4977 A San Mateo Pescadero Creek Watershed, Pescadero Road just north of Loma Mar 107 Comment
  UCR219019  Lapsana communis George K. Helmkamp, E. A. Helmkamp 2010-6-23 16343 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
  UCR237345  Lapsana communis George K. Helmkamp, E. A. Helmkamp 2012-6-13 19178 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 5.6 miles north of its junction with CA-20 and along Washington Creek 787 Comment
  UCR100797  Larrea tridentata George K. Helmkamp, E. A. Helmkamp 1998-3-18 2888 Imperial Sonoran (Colorado) Desert, 4.7 miles north of Winterhaven on Picacho Rd & 1 mile NW of the All-American Canal 76 Comment
  SD240876  Lasthenia californica George K. Helmkamp, E. A. Helmkamp 2010-3-26 15778 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
  UCR216929  Lasthenia californica George K. Helmkamp, E. A. Helmkamp 2010-5-4 15951 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
  UCR97540  Lasthenia ferrisiae George K. Helmkamp, E. A. Helmkamp 1997-3-8 1407 San Luis Obispo Inner Coast Range, Carrizo Plain; 30.1 mi. NW of Calif. Hwy 166 on Soda Lake Rd., at San Diego Creek Rd near edge of Soda Lake 610 Comment
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Nov 6 2015
  UCR121723  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 2001-4-26 6486 Kern Eastern Tehachapi Mtns Foothills, Tehachapi Willow Springs Rd., 2.2 mi south of Highline Rd. 1372 Comment
  UCR197268  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 2008-4-25 13301 El Dorado Sierra Nevada Mountains Foothills, junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Georgetown 674 Comment
  SEINET1908716  Lasthenia platycarpha G. K. Helmkamp, E. A. Helmkamp 2008-1 13216 Calaveras San Joaquin Valley/Sierra Nevada Mountains Foothills: 1.8 miles north of Burson via Burson Rd., at junction of Comanche Parkway South and Pattison Way 122 Comment
  UCR122373  Lathyrus littoralis George K. Helmkamp, E. A. Helmkamp 2001-7-8 7014 Humboldt North Coast, Samoa Peninsula, 2.6 miles south of CA Hwy 255 bridge across Humboldt Bay 15 Comment
  UCR235588  Lathyrus nevadensis subsp. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-5-5 18930 Placer Northern Sierra Nevada Mountains Foothills, Todd Valley Road, 1.2 miles south of its junction with Foresthill Road 779 Comment
  UCR258167  Lathyrus nevadensis subsp. nevadensis George K. Helmkamp, Mary Alice Barnes 2013-4-30 20433 El Dorado Northern Sierra Nevada Mountains, Capps Crossing/Bonnetti Road, 0.2 mile northwest of the bridge over Diamond /Camp Creek 1155 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
  UCR173295  Lathyrus sulphureus George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10494 El Dorado Northern Sierra Nevada Foothills, Along Calif. Hwy 193, 0.4 mi. south of Kelsey 604 Comment
  UCR217262  Lathyrus sulphureus George K. Helmkamp, E. A. Helmkamp 2010-5-13 16012 El Dorado Sierra Nevada Mountains Foothills, Mosquito Road, 4.4 miles northeast of its junction with US-50 in Placerville 620 Comment
  UCR140062  Lathyrus vestitus var. vestitus George K. Helmkamp 2004-4-14 8422 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR145627  Lathyrus vestitus var. vestitus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5491 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
  UCR161822  Lathyrus vestitus var. vestitus George K. Helmkamp, E. A. Helmkamp 2005-3-13 9121 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon, 3.1 mi south of Calif. Highway 166 396 Comment
  CAS-BOT-BC523884  Lavandula angustifolia George K. Helmkamp; E. A. Helmkamp 2012-9-15 19837 El Dorado Northern Sierra Nevada Mountains Foothills: Walton Lake; along Balderson Rd, 0.4 mi S of its jct with Wentworth Springs Rd 950 Comment
  UCR231898  Layia chrysanthemoides George K. Helmkamp, E. A. Helmkamp 2011-4-10 17155 Placer Sacramento Valley, along Riosa Road at the east edge of the village of Sheridan 41 Comment
  CLARK-A1045-497  Layia glandulosa George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north edge of Lake; sagebrush scrub; ; Big Bear City 7.5'Q 2133 Comment
  UCR51578  Layia glandulosa George K. Helmkamp 1987-6-17 s.n. Mono Owens Valley, Owens River, alkaline flats between river and Glass Mtn, c. 6 mi. NE of Benton's Crossing 2195 Comment
  RSA613942  Layia munzii George K. Helmkamp, E. A. Helmkamp 1997-3-8 1410 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
  UCR250686  Layia pentachaeta subsp. pentachaeta George K. Helmkamp, Mary Alice Barnes 2013-4-18 20355 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
  UCR122186  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2002-4-23 7566 Fresno Central Valley; San Joaquin Valley, along CA Hwy 180, 10.8 mi west of CA Hwy 145 107 Comment
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Jan 8 2013
  UCR206849  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-3-11 14358 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  UCR143564  Ledum glandulosum George K. Helmkamp, E. A. Helmkamp 2000-7-17 5838 Mono Sierra Nevada Mtns., W side of Lake Mary, SW of Mammoth Lakes 2720 Comment
  CLARK-A1045-980  Lemmonia californica George K. Helmkamp 1977-6-11 Kern Kern River disturbed roadside; ; Onyx 7.5'Q 914 Comment
  CAS-BOT-BC523893  Leontodon saxatilis subsp. longirostris George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20715 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy CA-20, 2.5 mi W of CA-49 in Grass Valley 623 Comment
  UCR198414  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2008-4-17 13292 Placer Sacramento Valley, Ranch House Road, 0.2 mile southeast of Sheridan 37 Comment
  UCR224238  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2010-4-23 15924 El Dorado Sierra Nevada Mountains Foothills, along Salmon Falls Road, 5.6 miles south of its junction with CA-49 at Pilot Hill, 0.65 mi. north of the American River crossing 200 Comment
  UCR257668  Leontodon taraxacoides subsp. taraxacoides George K. Helmkamp, Amy Barnes 2014-7-28 22939 El Dorado Sierra Nevada Mountains Foothills, Lake Walton beside Balderston Road; 1/4 mile south of Wentworth Springs Road 966 Comment
  RSA794918  Lepidium campestre George K. Helmkamp, E. A. Helmkamp 2011-7-17 17784 Nevada You Bet Road just northeast of its junction with CA-174, 1.25 mi. east (91 deg ) of Peardale 778 Comment
  UCR101038  Lepidium fremontii George K. Helmkamp, E. A. Helmkamp 1998-4-9 3313 San Bernardino Mojave Desert, Between hwy 58 & the Railroad at Edwards Siding (c. halfway between Mojave & Boron). 732 Comment
  UCR121146  Lepidium lasiocarpum George K. Helmkamp, E. A. Helmkamp 2001-3-17 6281 Imperial Sonoran (Colorado) Desert, Ogilby Rd., 15.4 miles south of Calif. Hwy 78 168 Comment
  CAS-BOT-BC173160  Lepidium nitidum G. K. Helmkamp; E. A. Helmkamp 2008-3-22 13218 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
  SEINET3245856  Lepidium nitidum G. K. Helmkamp, E. A. Helmkamp 2007-1 11685 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
  SBBG129233  Lepidium nitidum G. K. Helmkamp 2013-3-9 20157 Sutter W Butte Rd, 5.5 mi N of its jct with W Butte Pass Rd, NW foot of Sutter Buttes 24 Comment
  UCR188836  Lepidium nitidum var. nitidum George K. Helmkamp, E. A. Helmkamp 2007-3-23 11685 El Dorado Northern Sierra Nevada Mountains Foothills, hills bordering the east end of Sacramento Valley; Bass Lake Road at the southeast end of Bass Lake 381 Comment
  UCR189492  Lepidium nitidum var. nitidum George K. Helmkamp, E. A. Helmkamp 2007-3-22 11674 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
  CLARK-A1045-652  Lepidium oblongum George K. Helmkamp 1977-5-29 San Bernardino Cima Kelso 15'Q Comment
  SEINET13203266 Image available Lepidium virginicum George K. Helmkamp, Amy Barnes 2014-1 23006 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 1.7 miles south of Crystal Basin Information Station (Riverton 7.5' Q.) 1609 Comment
  UCR193192  Lepidium virginicum var. pubescens George K. Helmkamp, E. A. Helmkamp 2007-5-31 12250 El Dorado Northern Sierra Nevada Mountains, Forestry Route 32, 0.8 mile east of its junction with Ice House Road 1616 Comment
  UCR176381  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10962 El Dorado Northern Sierra Nevada Mtns, Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges 1960 Comment
  UCR161902  Leptodactylon californicum George K. Helmkamp, E. A. Helmkamp 2005-3-13 9127 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon 8.7 mi. south of Calif. Highway 166 396 Comment
  SD241131  Leptosiphon bicolor George K. Helmkamp, E. A. Helmkamp 2010-4-17 15899 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
  SEINET7967431 Image available Leptosiphon montanus G. E. Helmkamp, E. A. Helmkamp 2009-4-21 14528 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
  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
  UCR60019  Lessingia glandulifera var. glandulifera George K. Helmkamp 1988-9-8 s.n. Inyo Owens Valley, Pleasant Valley Dam Road, at junction with Hwy 395 1280 Comment
  RSA0011962  Leucanthemum vulgare George K. Helmkamp, E. A. Helmkamp 2011-9-1 18226 El Dorado Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR248424  Leucanthemum vulgare George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21005 Amador Northern Sierra Nevada Mountains, Plasse Road toward Silver Lake, 0.3 mile south of CA-88/Carson Pass Hwy 2276 Comment
  CLARK-A1045-1394  Ligusticum grayi George K. Helmkamp 1977-8-6 Mariposa Sierra Nevada Porcupine Flats Campground; wet meadow; ; Yosemite Falls 7.5'Q 2590 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
  UCR189039  Ligusticum grayi George K. Helmkamp, E. A. Helmkamp 2007-7-27 12619 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 9.9 miles north of its junction with CA-20 1774 Comment
  UCR218237  Lilium humboldtii subsp. humboldtii George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16442 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.3 miles SE of its junction with Canyon Way in Colfax 418 Comment
  CLARK-A1045-1385  Lilium kelleyanum George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada Porcupine Flats Campground; along side the stream; ; Yosemite Falls 7.5'Q 2590 Comment
  UCR248372  Lilium parvum George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21023 Amador Northern Sierra Nevada Mountains, Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 Comment
  UCR215987  Lilium washingtonianum var. washingtonianum George K. Helmkamp, Amy Barnes 2009-7-12 15179 Placer Sierra Nevada Mountains, along Foresthill Road 10.3 miles northeast of the town of Foresthill 1370 Comment
  SD241090  Limnanthes alba subsp. versicolor George K. Helmkamp, E. A. Helmkamp 2011-5-5 17178 El Dorado Northern Sierra Nevada Moutains Foothills: along Pleasant Valley Road, 0.7 mile norwest of Pleasant Valley (Camino 7.5'Q) 750 Comment
  SD255784  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 (Sly Park 7.5'Q) 753 Comment
  UCR106699  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 1998-5-18 3768 Santa Clara Central Coast Range, Mt.Hamilton Rd (Calif. Hwy 130) east of San Jose; 15.2 mi from the W origin of the Hwy 610 Comment
  UCR193180  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 2007-5-31 12253 El Dorado Northern Sierra Nevada Mountains, Forestry Route 32, 0.8 mile east of its junction with Ice House Road 1616 Comment
  UCR197827  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 2008-4-11 13240 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
  SEINET11266055  Linanthus ciliatus George Helmkamp, E. A. Helmkamp 2012-6-26 19279 Amador Northern Sierra Nevada Mountains: Panther Creek Road, 4.1 miles south of its junction with CA-88/Carson Pass Hwy. and W of Lower Bear Reservoir (Peddler Hill 7.5; Q.); 0 1518 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
  UCR206345  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2009-5-19 14714 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 0.2 miles west of its junction with Happy Valley Cutoff road 561 Comment
  UCR241341  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-26 19255 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
  UCR118312  Linanthus demissus George K. Helmkamp, E. A. Helmkamp 1998-4-18 3326 San Bernardino Central Mojave Desert., 18 mi ESE of Baker on Kelbaker Rd. 884 Comment
  CLARK-A1045-89  Linanthus dianthiflorus subsp. farinosus George K. Helmkamp 1978-4-27 Riverside San Jacinto Mountains 2 miles up [east northeast] from Oak Spring; Lake Fulmor 7.5'Q Comment
  SEINET3817938 Image available Linanthus harknessii George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18044 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 5 miles north of Boards Crossing of the North Fork Stanislaus River (Boards Crossing 7.5' Q. 1716 Comment
  UCR242590  Linanthus montanus George K. Helmkamp, E. A. Helmkamp 2011-5-31 17406 El Dorado Northern Sierra Nevada Mountains Foothills, Happy Valley Cutoff Road on the southeast side of the bridge over the North Fork of the Cosumnes River, 1.4 mi. NE (61 deg. ) of Somerset 546 Comment
  UCR51459  Linanthus nuttallii George K. Helmkamp 1987-6-17 s.n. Mono Owens Valley, Owens River, alkaline flats between river and Glass Mtn, c. 6 mi. NE of Benton's Crossing 2195 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
  UCR163790  Linanthus parviflorus George K. Helmkamp, E. A. Helmkamp 2005-3-31 9293 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. National Forest Boundary along Figueroa Mountain Road NE of Los Olivos 701 Comment
  UCR237081  Linanthus parviflorus George K. Helmkamp, E. A. Helmkamp 2012-4-24 18833 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
  SEINET11262686  Linum bienne George Helmkamp, E. A. Helmkamp 2011-6-7 17469 Amador Northern Sierra Nevada Mountains Foothills: Shake Ridge Road, 1 mile southwest of its junction with Pine Gulch Road, c. 1.3 mi NE of Sutter Creek. (Amador City 7.5' Q.).; 0 130 Comment
  UCR171334  Linum lewisii var. lewisii George K. Helmkamp, E. A. Helmkamp 2005-10-1 9981 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
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Jan 15 2008
  UCR232222  Lithophragma bolanderi George K. Helmkamp, E. A. Helmkamp 2011-6-7 17494 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
  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
  RSA628248  Lithophragma parviflorum var. parviflorum George K. Helmkamp, E. A. Helmkamp 1998-5-14 3677 Monterey Along CA Hwy 25, 17.6 mi. NE of the jct with CA Hwy 198. 488 Comment
  UCD66001  Lolium multiflorum G. K. Helmkamp; E. A. Helmkamp 2007-5-5 11749 Amador Northern Sierra Nevada Mountains: along CA-49, 0.2 mile west of Amador City. 309 Comment
  SEINET269500 Image available Lolium multiflorum G. Helmkamp 1994-5-18 91 -25 San Luis Obispo Alamo Canyon 7 miles east of US-101 on CA-166 then 4 miles north (generally northeast of Twitchell reservoir) 213 Comment
  SEINET9262002  Lolium perenne George K. Helmkamp, Amy Barnes 2014-1 22725 Sacramento Sacramento Valley: Clay East Road, 1 mile east of its junction with CA-104 (Clay 7.5 Q) 52 Comment
  UCR184849  Lolium perenne George K. Helmkamp, E. A. Helmkamp 2007-4-26 11819 Amador Foothills, northern Sierra Nevada Mountains, along Calif. E-16, 0.7 mile south of River Pines 610 Comment
  UCR197369  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2008-3-22 13213 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
  UCR238922  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2012-2-3 18518 Stanislaus San Joaquin Valley, junction of Sonora Road and Milton Road, 17 km NE (50 deg. ) of Escalon 58 Comment
  UCR39185  Lolium perenne subsp. multiflorum George K. Helmkamp 1985-5-10 480 San Bernardino Little San Bernardino Mountains, At entrance to Big Morongo Nature Conservancy Preserve, SE of town of Morongo Valley 762 Comment
  SD241721  Lomatium caruifolium George K. Helmkamp, E. A. Helmkamp 2012-3-22 18638 Amador Northern Foothills, Sierra Nevada Mountains: Bell Road, 0.2 mile east of its junction with CA-49 (Fiddletown 7.5'Q) 270 Comment
  CAS-BOT-BC226936  Lomatium caruifolium var. denticulatum George K. Helmkamp; E. A. Helmkamp 2011-4-10 17169 Placer Sacramento Valley: along Riosa Road, 2.3 miles east of Sheridan 43 Comment
  UCR61716  Lomatium dissectum George K. Helmkamp 1990-4-19 s.n. Kern Tehachapi Mountains, along State Hwy 58, at Hart Flat Road, 2 miles west of Keene 765 Comment
  SD240824  Lomatium marginatum George K. Helmkamp, E. A. Helmkamp 2011-4-12 17175 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 (Placerville 7.5'Q) 487 Comment
  RSA794871  Lomatium marginatum var. marginatum George K. Helmkamp, E. Helmkamp 2011-6-2 17429 Nevada Along CA-20, 3.3 miles west of its junction with CA-49 in Grass Valley 627 Comment
  SD236163  Lomatium utriculatum G. K. Helmkamp, E. A. Helmkamp 2008-3-22 13203 Calaveras San Joaquin Valley/Sierra Nevada Mountains Foothills: along CA-26 (joint with CA-12) 10.6 miles southwest of its junction with CA-49 213 Comment
  SEINET235196  Lomatium utriculatum G. K. Helmkamp, E. A. Helmkamp 1998-5-13 3537 Kern Greenhorn Mtns Southern Sierra Nevada: 6.5 miles SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near 396 Comment
  UCR107329  Lomatium utriculatum George K. Helmkamp, E. A. Helmkamp 1998-5-14 3652 Monterey Coast Range, Peachtree Valley, along Calif. Hwy 198, 6.2 mi. west of the Fresno/Monterey County lines. 503 Comment
  UCR122615  Lomatium utriculatum George K. Helmkamp, E. A. Helmkamp 2000-4-24 5567 Monterey Salinas Valley., 8.4 mi lS of King City along G-14. 381 Comment
  RSA714203  Lomatium vaginatum George K. Helmkamp, E. Helmkamp 2006-3-19 10082 Amador Northern Sierra Nevada Foothills: along CA Highway 49 just S of Plymouth 323 Comment
  RSA747385  Lonicera conjugialis George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13915 El Dorado Northern Sierra Nevada Mountains: Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50. 2043 Comment
  SEINET3828500  Lonicera hispidula var. vacillans George K. Helmkamp 2010-1 16989 Amador Northern Sierra nevada Mountains Foothills: Shake Ridge Road, 0.8 mile southwest of its junction with Fiddletown Road, 3.5 miles NE (32 degrees) of Volcano (West Point) Comment
  UCR129531  Lonicera hispidula var. vacillans George K. Helmkamp, E. A. Helmkamp 2001-5-31 6750 Santa Clara San Francisco Bay, Mt. Hamilton Rd. east of San Jose at Mile-15 290 Comment
  UCR174929  Lonicera hispidula var. vacillans George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10791 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 12.3 miles east of the Mokelumne Hill turnoff from Calif. Hwy 49 640 Comment
  UCR206103  Lonicera hispidula var. vacillans George K. Helmkamp, E. A. Helmkamp 2009-6-3 14899 El Dorado Northern Sierra Nevada Mountains, Forbay Road, 4.7 miles northwest of its junction with Pony Express Trail in Pollock Pines 945 Comment
  UCR207665  Lotus argophyllus var. fremontii George K. Helmkamp, E. A. Helmkamp 2009-4-21 14533 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR208542  Lotus argophyllus var. fremontii George K. Helmkamp, E. A. Helmkamp 2009-5-7 14610 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 9.8 miles east of its junction with Forest Hill Road in Foresthill 433 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
  UCR158570  Lotus heermannii var. orbicularis George K. Helmkamp 2004-6-15 8640 San Luis Obispo Central Coast, Between Oso Flaco Lake and the Pacific Ocean, c. 0.3 mi WNW of the lake 9 Comment
  UCR91831  Lotus heermannii var. orbicularis George K. Helmkamp 1996-5-25 1081 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
  UCR161899  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2005-3-14 9185 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 12.8 mi. NE of Los Olivos 905 Comment
  UCR184822  Lotus micranthus George K. Helmkamp, E. A. Helmkamp 2007-5-9 11978 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 2.0 miles northeast of US-50, c. 1.25 mi. NE of Riverton 1220 Comment
  UCR251270  Lotus nevadensis George K. Helmkamp, E. A. Helmkamp 2012-7-6 19347 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
  UCR240891  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19135 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 1.5 miles south of its junction with CA-88, 5.0 mi. west (267 deg. ) of Bear River Reservoir dam 1590 Comment
  UCR246577  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19142 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 6.2 miles south of its junction with CA-88, 5.9 mi. SW (245 deg. ) of Bear River Reservoir dam 1438 Comment
  RSA795081  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-8-26 18170 Placer along Forest Hill Road, 0.4 miles west of Robinson Flat. 2041 Comment
  UCR106466  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 1998-5-13 3584 Tulare Sierra Nevada Foothills, 11.5 mi east of Fountain Springs along Hot Springs Road 808 Comment
  UCR170575  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2005-9-1 9825 El Dorado Northern Sierra Nevada Foothills, E of Sacramento; Sand Canyon Road, 0.3 mi east of Calif. Highway 49 and Logtown Ridge 280 Comment
  UCR182282  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2006-10-23 11569 Amador Central Valley/ Northern Sierra Nevada Foothills, along Calif. Hwy 16, 0.2 mile east of Waits Station, southwest of Plymouth 305 Comment
  UCR191141  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2007-8-26 12810 Amador Northern Sierra Nevada Mountains Foothills, along Hwy CA-49 at mile-20, 2.1 miles north of Plymouth; beside Blue Indian Creek 299 Comment
  UCR191143  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2007-6-8 12312 El Dorado Northern Sierra Nevada Mountains, junction of Bonetti Road and Mormon Emigrant Trail [Silver Lake Rd.], east of Jenkinson Lake 1226 Comment
  UCR201720  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-30 14286 Sacramento Southern Sacramento Valley, Highway E13 (Twin Cities Road), 3.5 miles west of CA-99 18 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
  UCR240965  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2012-9-25 19917 Placer Northern Sierra Nevada Mountains, junction of Nyack Road and I-80 in the Emigrant Gap area 1652 Comment
  UCR253636  Lotus purshianus var. purshianus George K. Helmkamp, Elizabeth Helmkamp 2012-11-12 20140 El Dorado Eastern Sacramento Valley, El Dorado Hills; Windfield Parkway 0.2 mile south of White Rock Road 175 Comment
  UCR259855  Lotus purshianus var. purshianus George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22435 Amador Sierra Nevada Mountains Foothills, Plymouth, at the junction of Mineral Street and Mill Street, near Hwy CA-49 329 Comment
  UCR130688  Lotus scoparius George K. Helmkamp, E. A. Helmkamp 1999-4-17 4682 San Diego Peninsular Ranges, Barrett-Smith Rd between Barrett Junction & Barrett School Rd. NE of Calif. Hwy 94 268 Comment
  RSA628387  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 1999-4-17 4693 San Diego Honey Springs Rd 1.9 mi W of California-94 366 Comment
  UCR100870  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 1998-2-18 2704 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  UCR121505  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 2000-6-19 5777 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 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
  UCR140391  Lotus strigosus George K. Helmkamp 2004-2-19 8310 San Luis Obispo Central Coast, NW of Nipomo, Pomeroy Rd, 0.2 mi N of Willow Rd. 91 Comment
  RSA750434  Lotus uliginosus George K. Helmkamp, E. A. Helmkamp 2008-8-20 14024 Placer Donner Pass Road on the west side of Donner Pass and east of Norden 2149 Comment
  RSA615332  Lotus wrangelianus George K. Helmkamp, E. A. Helmkamp 1998-4-8 3214 San Luis Obispo Elkhorn Grade Rd, 13.7 mi. NW of jct with CA hwy 33 (roughly W of Maricopa). 579 Comment
  UCD106006  Lupinus albifrons var. albifrons G. K. Helmkamp; Elizabeth Helmkamp 2006-4-13 10195 Placer Northern Sierra Nevada Foothills; Forest Hill Road, 2.5 mi E of its junction with CA Hwy 49. North side of the middle fork of the American River. NE of Auburn. 274 Comment
  UCR122154  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2000-4-21 5441 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  UCR163773  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2005-3-31 9279 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. 14.0 mi NE of Los Olivos along Figueroa Mountain Road 1000 Comment
  UCR109063  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 1998-6-30 4206 San Luis Obispo South Coast Range, Alamo Creek Rd, 0.9 mile north of Calif. Hwy 166, near Twitchell Reservoir 320 Comment
  CLARK-A1045-1181  Lupinus andersonii George K. Helmkamp 1977-9-1 VB Alpine Sierra Nevada dry slope under pines; ; Freel Peak 7.5'Q 2346 Comment
  UCR121959  Lupinus argenteus var. argenteus George K. Helmkamp, E. A. Helmkamp 1998-8-11 4294 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  UCR176483  Lupinus argenteus var. argenteus George 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
  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
  UCR209690  Lupinus argenteus var. montigenus George K. Helmkamp, E. A. Helmkamp 2009-8-4 15360 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 1787 Comment
  SD143899  Lupinus arizonicus G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2885 Imperial 4.7 mi N of Winterhaven on Picacho rd & 1 mi NW of the All-American Canal. 75 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
  UCR235634  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2012-4-30 18878 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road, 0.3 mile north of the bridge over the South Fork American River 427 Comment
  RSA613946  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 1997-3-8 1418 San Luis Obispo Along CA-58 just W of Navajo Creek (W of Carrizo Plain).Ca. 5 miles south of California Highway 76 on Couser Ranch Rd. onto Lilac Rd. to Wills avocado ranch. (33 deg 15.6N, 117 deg 6W) 335 Comment
  SBBG122299  Lupinus bicolor G. K. Helmkamp with E. A. Helmkamp 2008-4-17 13296 Placer ca. 0.2 mi N of St Hwy 193 on Fowler Rd, ca. 6 mi E of Lincoln 92 Comment
  SEINET4178606 Image available Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2011-3-29 17090 Calaveras East end San Joaquin Valley: along CA-26, 1.8 miles southwest of Valley Springs 206 Comment
  UCR115560  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2000-4-20 5414 San Luis Obispo Central Coast, Irish Hills, north of Avila Beach, See Canyon, 7.4 mi south of Los Osos Valley Road 213 Comment
  UCR121721  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2001-4-26 6488 Kern Eastern Tehachapi Mtns Foothills, Tehachapi Willow Springs Rd., 2.2 mi south of Highline Rd. 1372 Comment
  UCR206360  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-11 14383 Colusa Sacramento Valley, on the south side of CA-20 just west of the junction with Freshwater Road, northwest edge of Williams 49 Comment
  UCR206724  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-17 14392 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  UCR233110B  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2010-4-7 15839 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
  UCR249528  Lupinus bicolor George K. Helmkamp, Amy Barnes 2013-3-28 20290 Placer Eastern Sacramento Valley, northwest side of junction of Riosa Road and Andressen Road, northeast of Sheridan 36 Comment
  UCR131348  Lupinus chamissonis George K. Helmkamp, E. A. Helmkamp 1999-5-22 4894 San Luis Obispo Central Coast, Los Osos; north of the corner of Buckskin Dr. & Martingale Ave. 61 Comment
  SEINET238181  Lupinus concinnus George K. Helmkamp 1998-6-27 4097 Riverside Santa Rosa Mtns.: 3.3 mi S of Hwy 74 along Santa Rosa Mtn Rd. in vicinity of an unnamed spring. 1585 Comment
  UCR130679  Lupinus concinnus George K. Helmkamp, E. A. Helmkamp 1999-4-15 4642 San Diego Between Lake Henshaw & Matagual Valley, Barrett Hill Rd off of Hwy-79, c. 6.5 mi SW of Warner Hot Springs 838 Comment
  UCR110961  Lupinus excubitus George K. Helmkamp 1998-6-27 4089 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
  SD193284  Lupinus formosus var. formosus G. K. Helmkamp, E. Helmkamp 2005-5-12 9434 Monterey 8.0 miles west of US 101 on Highway CA G-18 in Hames Valley. 341 Comment
  UCR197342  Lupinus fulcratus George K. Helmkamp, E. A. Helmkamp 2008-7-11 13790 Amador Northern Sierra Nevada Mountains, south side of CA-88, 0.2 mile west of Carson Spur Summit 2421 Comment
  UCR253074  Lupinus fulcratus George K. Helmkamp, Belinda Pesheck 2013-7-14 21084 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  UCR189604  Lupinus grayi George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12376 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
  UCR163637  Lupinus hirsutissimus George K. Helmkamp, E. A. Helmkamp 2005-3-25 9227 San Luis Obispo Outer South Coast Ranges, upper Lopez Canyon; 2.2 mi north of Hi Mountain Road along Upper Lopez Canyon Road 317 Comment
  SEINET238551  Lupinus hyacinthinus George K. Helmkamp 1998-6-27 4124 Riverside Santa Rosa Mtns.: 9 mi SE of Hwy 74 along Santa Rosa Mtn Rd. in vicinity of Santa Rosa Spring. 2232 Comment
  CLARK-A1045-1383  Lupinus latifolius George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay Turri Road west of Morro Bay; Morro Bay S 7.5'Q Comment
  CLARK-A1045-1392  Lupinus latifolius var. columbianus George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada Porcupine Flats Campground; wet meadow beside stream; ; Yosemite Falls 7.5'Q 2590 Comment
  RSA755553  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2009-8-19 15494 El Dorado Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  SD241820  Lupinus latifolius var. columbianus G. K Helmkamp, E. A. Helmkamp 2012-5-28 19078 El Dorado Northern Sierra Nevada Mountains: 1.1 milse east of the E damm of Jenkinson Lake via Mormon Emigrant Trail, then 0.6 mile SE toward Fleming Meadow (?) on an unnamed road off Bonetti Road (Sly Park 7.5'Q) 1168 Comment
  UCR207425  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2009-7-22 15244 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 2.7 miles north of its junction with US-50, c. 0.25 mi. due S of Chimney Flat 2000 Comment
  UCR15449  Lupinus lepidus George K. Helmkamp 1977-8-5 s.n. Tuolumne Sierra Nevada Mountains, Porcupine Flat Campground 2591 Comment
  UCD108398  Lupinus lepidus var. confertus G. 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
  UCD108400  Lupinus lepidus var. confertus G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12640 Placer Northern Sierra Nevada Mountains: 0.1 mile south of the Rainbow exit from Interstate-80, 0.5 miles east of Rainbow. 1790 Comment
  UCR189631  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2007-7-27 12640 Placer Northern Sierra Nevada Mountains, 0.1 mile south of the Rainbow exit from Interstate-80, 0.5 miles east of Rainbow 1790 Comment
  SBBG129026  Lupinus lepidus var. sellulus G. K. Helmkamp, E. A. Helmkamp 2013-8-14 22248 Alpine CA-4, 12.4 mi SW of the CA-89 jct and just N of Kinney Reservoir 2540 Comment
  UCR171401  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 2005-9-30 9964 Placer Northern Sierra Nevada Mtns., c. 3.5 mi NW of Lake Tahoe; Along the Truckee River and Calif. Highway 89, 0.1 mi N of Alpine Meadows Road 1902 Comment
  UCR252788  Lupinus lepidus var. sellulus George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22095 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 Comment
  UCR131844  Lupinus littoralis George K. Helmkamp, E. A. Helmkamp 2000-6-18 5754 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  SD212613  Lupinus microcarpus var. densiflorus G. K. Helmkamp, Elizabeth Helmkamp 2006-5-6 10300 Amador Along Highway CA49, 0.3 mile south of Drytown. 226 Comment
  UCR107346  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-5-14 3629 Fresno Coast Range, Warthan Creek Canyon, along Calif. Hwy 198, 27.6 mi. west of Interstate 5, west of Coalinga 457 Comment
  UCR206288  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14730 Yolo Inner Coast Range, west side of Cache Creek along CA-16, 5.5 miles southeast of the Colusa County line 177 Comment
  UCR242314  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2011-6-17 17605 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
  SD148160  Lupinus microcarpus var. microcarpus G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6518 Kern Tehachapi Mountains: Hart Flat turnoff from CA-58 883 Comment
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Sep 18 2009
  UCD108850  Lupinus microcarpus var. microcarpus G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11825 Amador northern Sierra Nevada Mountains: along CA E-16, 0.7 mile south of River Pines. 610 Comment
  UCD109014  Lupinus nanus G. K. Helmkamp; Elizabeth Helmkamp 2005-5-12 9462 Monterey Central Coast Ranges:WNW of Lockwood along Hwy G-14; mile-28 on the road. 329 Comment
  UCD109064  Lupinus nanus G. K. Helmkamp; E. A. Helmkamp 2007-3-23 11694 El Dorado Northern Sierra Nevada Mountains: hills bordering the east end of Sacramento Valley. Salmon Falls Road, 4.6 miles north of Green Valley Road, above NE arm of Folsom Lake. 384 Comment
  UCR115782  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2000-4-19 5381 San Luis Obispo Central Coast, Irish Hills (SSW of San Luis Obispo). See Cyn., 3 mi south of Los Osos Valley Rd, up Prefumo Cyn. to crest, and down See Cyn. to the site 213 Comment
  UCR118263  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5507 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
  UCR161101  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2005-6-12 9660 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
  UCR161937  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2005-3-1 8988 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
  UCR163606  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2005-3-25 9196 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness; Hi Mountain Road, 6.7 miles ENE of Lopez Lake near Salt Creek 399 Comment
  UCR173488  Lupinus nanus George K. Helmkamp, Elizabeth Helmkamp 2006-4-29 10268 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
  UCR195158  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2007-5-26 12089 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 5.6 miles north of Nevada City 518 Comment
  UCR196878  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2008-5-15 13443 El Dorado Sierra Nevada Mountains, White Meadow Road, 0.1 mile west of its junction with Ice House Road, c. 1.3 miles up Ice House Road from US-50 1055 Comment
  UCR208546  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2009-5-11 14674 Placer Sierra Nevada Mountains Foothills, Driver's Flat Road 0.8 mile south of its junction with Forest Hill Road, c. 8 miles (air) NE of Auburn 517 Comment
  UCR217161  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2010-5-15 16048 El Dorado Sierra Nevada Mountains Foothills, String Canyon Road, 1.4 miles northeast of its junction with Consumnes Mine Road 1110 Comment
  UCR218235  Lupinus nanus George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16444 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.3 miles SE of its junction with Canyon Way in Colfax 418 Comment
  UCR122214  Lupinus polyphyllus subsp. polyphyllus George K. Helmkamp, E. A. Helmkamp 2000-6-18 5805 Mendocino North Coast Range, 9.2 mi east of CA Hwy 1 on CA Hwy 20, southeast of Fort Bragg 305 Comment
  UCR188841  Lupinus polyphyllus subsp. polyphyllus George K. Helmkamp, E. A. Helmkamp 2007-3-25 11708 Placer Northern Sierra Nevada Mountains Foothills, Forest Hill Road, 0.9 mile east of its junction with CA-49 at the bridge of the junction of American River forks 287 Comment
  CAS-BOT-BC438822  Lupinus polyphyllus var. burkei George K. Helmkamp; Mary Alice Barnes 2013-5-3 20458 Placer Northern Sierra Nevada Mountains Foothills: Forest Hill Road, 4.8 miles east of its junction with Upper Clementine Lake Road, 10.1 mi. NE (52 deg. ) of Auburn. 672 Comment
  IRVC28954  Lupinus polyphyllus var. burkei G. K. Helmkamp, E. A. Helmkamp 2000-7-17 5837 Mono W side of Lake Mary, SW of Mammoth Lakes. Sierra Nevada Mtns. 2652 Comment
  SEINET4560794  Lupinus polyphyllus var. burkei George K. Helmkamp 2010-1 16884 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 Reservior 2161 Comment
  UCR189205  Lupinus polyphyllus var. burkei George K. Helmkamp 2007-7-7 12482 Alpine Northern Sierra Nevada Mountains, along CA-89, 1.3 miles north of its junction with CA-88 2262 Comment
  UCR189458  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2007-8-4 12709 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail at Leek Spring meadow, about 2 miles northwest of CA-88 2238 Comment
  UCD109601  Lupinus succulentus G. K. Helmkamp 2004-4-21 8485 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR134390  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2001-4-29 6583 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  CLARK-A1045-873  Lupinus truncatus George K. Helmkamp 1977-3-5 Riverside Santa Ana Mountains along Riverside-San Diego County Line at start of Interstate Highway 215; ; southern oak woodland; Temecula 7.5'Q Comment
  UCR140393  Lupinus truncatus George K. Helmkamp 2004-2-29 8313 San Luis Obispo Central Coast, Nipomo Mesa, Nipomo, Orchard Ave. 0.1 mi NW of Division St. 116 Comment
  UCR161347  Lupinus truncatus George K. Helmkamp, E. A. Helmkamp 2005-3-8 9057 San Luis Obispo Central Coast Hills, Prefumo Canyon, north side of Irish Hills; 3.0 mi west of Los Osos Valley Road 140 Comment
  UCR91841  Lupinus variicolor George K. Helmkamp 1996-5-25 1062 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
  UCR132754  Luzula comosa George K. Helmkamp 1977-7-4 s.n. Mono Owens Valley, Big Springs along the Owens River 2226 Comment
  UCR173727  Luzula comosa George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10514 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
  UCR173848  Luzula comosa George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10669 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 6.1 miles north of Hwy US-50 1653 Comment
  UCR197270  Luzula comosa George 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 Georgetown 674 Comment
  UCR208569  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2009-5-4 14600 El Dorado Sierra Nevada Mountains Foothills, Sly Park Road, 0.3 miles southwest of its junction with Mormon Emigrant Trail 1067 Comment
  SD239494  Luzula macrantha George K Helmkamp, E. A. Helmkamp 2012-5-5 18937 Placer Northern Sierra Nevada Mountains Foothills: Todd Valley Road, 1.2 miles south of its junction with Foresthill Road (Georgetown 7.5'Q) 779 Comment
  UCR252804  Lythrum californicum George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22072 Amador Northern Sierra Nevada Mountains Foothills, SE of Pioneer along CA-26, north side of North Fork Mokelumne River 628 Comment
  UCR99047  Lythrum hyssopifolia George K. Helmkamp 1997-6-20 2049 San Luis Obispo Central Coast, Los Osos, c. 0.2 mi. NE of Buckskin & Martingale 27 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
  UCR121739  Machaeranthera canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2000-7-19 5941 Mono Sierra Nevada Mountains, McGee Creek Rd about 4 mi SW of US-395 2470 Comment
  SD240887  Madia citrigracilis George K. Helmkamp, E. A. Helmkamp 2011-7-12 17714 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 6.7 miles east of tis junction with CA-26 in West Point (Devils Nose 7.5'Q) 1192 Comment
  UCR176254  Madia citrigracilis George K. Helmkamp, E. A. Helmkamp 2006-8-14 11239 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  UCR233135A  Madia elegans George K. Helmkamp, E. A. Helmkamp 2011-5-21 17335 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
  UCR252972  Madia elegans subsp. densifolia George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22142 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 4.8 miles northeast of the town of Sutter Creek 405 Comment
  UCR170362  Madia elegans subsp. elegans George K. Helmkamp, Elizabeth Helmkamp 2005-9-9 9849 El Dorado Northern Sierra Nevada Foothills, E of Sacramento; Squaw Hollow area at junction of Hanks Exchange Road and Ranch Road, 0.9 mi south of Pleasant Valley Road 683 Comment
  UCR190571  Madia elegans subsp. elegans George K. Helmkamp, E. A. Helmkamp 2007-9-4 12891 Amador Northern Sierra Nevada Mountains, along CA-88 at Mile-49, 3.1 miles east of Hams Station 1860 Comment
  UCR190672  Madia elegans subsp. elegans George K. Helmkamp, E. A. Helmkamp 2007-9-4 12901 Amador Northern Sierra Nevada Mountains Foothills, Climax Road 0.8 mile west of its junction with CA-88 701 Comment
  UCR259012  Madia elegans subsp. elegans George K. Helmkamp, Amy Barnes 2014-9-16 23087 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
  UCR194935  Madia elegans subsp. vernalis George K. Helmkamp, E. A. Helmkamp 2007-5-18 12018 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road, 4.2 miles southeast of Foresthill 793 Comment
  UCR206347  Madia elegans subsp. vernalis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14726 Yolo Inner Coast Range, west side of Cache Creek along CA-16, 5.5 miles southeast of the Colusa County line 177 Comment
  JEPS119456  Madia exigua George K. Helmkamp with E. A. Helmkamp 2011-7-17 17746 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. Comment
  UCR190664  Madia exigua George K. Helmkamp, E. A. Helmkamp 2007-5-23 12075 Placer Northern Sierra Nevada Mountains Foothills, junction of Iowa Hill Road and Finning Mill Road (U. S. F. S. Rd #10) in the Sugar Pine Recreation area 1137 Comment
  UCD134263  Madia glomerata G. 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
  UCR170793  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2005-9-30 9956 Placer Northern Sierra Nevada Mtns., Junction of Chalet and Alpine Meadows Roads west of Calif. Highway 89 (near Alpine ski area) 2081 Comment
  UCR201747  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2008-8-1 13949 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 2.2 miles south of the entrance to Wright's Lake 2070 Comment
  UCR240967  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2012-9-25 19919 Placer Northern Sierra Nevada Mountains, Laing Road, parallel to I-80; 0.2 mile east of its junction with Emigrant Gap Road 1611 Comment
  UCR242832  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2010-9-1 16874 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
  UCR257857  Madia glomerata George K. Helmkamp, Amy Barnes 2012-8-12 19641 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
  JEPS119439  Madia gracilis George K. Helmkamp with E. A. Helmkamp 2009-5-14 14701 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville Comment
  RSA0035519  Madia gracilis George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-5 20751 Sierra Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  SD236217  Madia gracilis G. K. Helmkamp, E. A. Helmkamp 2008-7-16 13822 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.1 mile south of its junction with CA-88 (Caples Lake 7.5'Q) 2457 Comment
  UC2044588  Madia gracilis George K. Helmkamp with E. A. Helmkamp 2012-6-26 19278 Amador Northern Sierra Nevada Mountains Panther Creek Road, 4.1 miles south of its junction with CA-88, S of Highway 88/Carson Pass Hwy. and W of Lower Bear Reservoir. (Peddler Hill 7.5' Q.) Comment
  UCR106728  Madia gracilis George K. Helmkamp, E. A. Helmkamp 1998-5-18 3786 Santa Clara Central Coast Range, Mt.Hamilton Rd (Calif. Hwy 130) east of San Jose; 15.2 mi from the W origin of the Hwy 610 Comment
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Jan 7 2013
  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
  UCR189619  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2007-8-29 12836 Yuba Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 0.5 mile south of Camptonville 817 Comment
  UCR206055  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-6-11 14985 Shasta Southern Cascade Range, '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
  UCR207035  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-6-11 14968 Shasta Southern Cascade Range, within the village of Shingletown along CA-44 1037 Comment
  UCR218979  Madia gracilis George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16327 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
  UCR234629  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2011-6-2 17447 Nevada Northern Sierra Nevada Mountains Foothills, 2 miles SW (241 deg. ) of French Corral, Pleasant Valley Road just south of the bridge over the South Fork of the Yuba River 180 Comment
  UCR234642  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2011-6-2 17441 Nevada Northern Sierra Nevada Mountains Foothills, Lake Wildwood, along Pleasant Valley Road, 1.2 miles north of its junction with CA-20 433 Comment
  UCR256656  Madia gracilis George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20743 Nevada Northern Sierra Nevada Mountains, Pine Flat Way, just south of its junction with CA-20 1151 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
  UCR237347  Madia minima George K. Helmkamp, E. A. Helmkamp 2012-6-13 19160 A Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 2.6 miles north of its junction with CA-20 1088 Comment
  UCR251268  Madia minima George K. Helmkamp, E. A. Helmkamp 2012-7-6 19349 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
  RSA628860  Malacothrix californica George K. Helmkamp, E. A. Helmkamp 1999-4-15 4646 San Diego Between Lake Henshaw and Matagual Valley, Barrett Hill Road off of highway 79, 6.5 miles southwest of Warner Hot Springs 838 Comment
  UCR189593  Malacothrix floccifera George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12363 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
  UCR233057  Malva parviflora George K. Helmkamp, E. A. Helmkamp 2011-5-12 17272 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCD116719  Malvella leprosa G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13048 Sacramento Sacramento Valley: Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCR59719  Malvella leprosa George K. Helmkamp 1989-9-16 s.n. Riverside Sonoran (Colorado) Desert, S of Ripley at 32nd Street and Rannells Blvd 75 Comment
  RSA615336  Marina parryi George K. Helmkamp, E. A. Helmkamp 1998-2-18 2694 Riverside Sonoran (Colorado) Desert Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  SEINET2063255 Image available Marina parryi George Helmkamp 1995-3-16 Riverside Slopes of Coxcomb Mts. W of Rice Rd., 10.3 mi NE of Desert Center 198 Comment
  RSA0038509  Marrubium vulgare George K. Helmkamp, Mary Alice Barnes 2013-5-3 20470 Placer SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road 974 Comment
  UCR234646  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2011-6-2 17444 A Nevada Northern Sierra Nevada Mountains Foothills, 2 miles SW (241 deg. ) of French Corral, Pleasant Valley Road just south of the bridge over the South Fork of the Yuba River 180 Comment
  UCR253491  Marrubium vulgare George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20072 San Joaquin San Joaquin Valley, Rock Creek, at East Sonora Road, 1.3 miles southeast of CA-4 50 Comment
  UCR257143  Matricaria discoidea George K. Helmkamp, Mary Alice Barnes 2013-5-8 20515 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 13 Comment
  UCR207833  Matricaria matricarioides George K. Helmkamp, E. A. Helmkamp 2009-3-26 14460 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 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
  SEINET13203265 Image available Medicago orbicularis George K. Helmkamp, Amy Barnes 2013-1 20234 Placer Eastern Sacramento Valley: NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 (Sheridan 7.5' Q.) 43 Comment
  UCR258125  Medicago orbicularis George K. Helmkamp, Amy Barnes 2014-3-21 22647 Placer Sacramento Valley, Sheridan, Riosa Road at the west side of its junction with old CA-65 33 Comment
  SEINET13203103 Image available Medicago polymorpha George K. Helmkamp, Amy Barnes 2014-1 22599 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
  UCR140099  Medicago polymorpha George K. Helmkamp 2004-2-7 8264 San Luis Obispo Central Coast, SE of Oceano along Halcyon Rd., just east of Mesa View Dr. 76 Comment
  UCR207831  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-3-26 14461 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  UCR208336  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2009-4-21 14554 El Dorado Sierra Nevada Mountains Foothills, along CA-193, 1.1 miles south of the South Fork American River at Chili Bar 381 Comment
  UCR258165  Medicago polymorpha George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20041 Placer Sierra Nevada Mountains Foothills, city of North Auburn, corner of Locksley Lane and CA-49 384 Comment
  SD247428  Medicago sativa George Helmkamp, E. A. Helmkamp 2012-1-13 18510 Sacramento Southern Sacramento Valley: Rancho Murieta, Jackson Road (CA-16), 1.2 miles west of Michigan Bar Road (Carbondale 7.5'Q) 66 Comment
  UCR170353  Medicago sativa George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9861 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
  SEINET2473463 Image available Melica aristata George K. Helmkamp, E. A. Helmkamp 2009-1 15343 Calaveras Sierra Nevada Mountains; Ganns Meadow Drive just south of its junction with CA-4, 16.7 miles northeast of Arnold 2067 Comment
  UCR87672  Melica aristata George K. Helmkamp, E. A. Helmkamp 1995-6-22 95 4 37 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UCR235579  Melica bulbosa George K. Helmkamp, E. A. Helmkamp 2012-5-3 18892 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 7.0 miles NW of Pollock Pines 748 Comment
  UCR253128  Melica californica George K. Helmkamp, Amy Barnes 2014-4-23 22808 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
  UCR171403  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2005-7-31 9725 A El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR188481  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13050 Sutter Sacramento Valley, Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR253596  Melilotus albus George K. Helmkamp, Elizabeth Helmkamp 2012-11-5 20120 Amador Sierra Nevada Mountains Foothills, Along CA-26 on the north side of the bridge over the North Fork Mokelumne River 628 Comment
  UCR252981  Melissa officinalis George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22148 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 11.3 miles northeast of the town of Sutter Creek 582 Comment
  UCR218994  Mentha X piperita George K. Helmkamp, E. A. Helmkamp 2009-9-13 15606 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 529 Comment
  SD148130  Mentha pulegium G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6987 Humboldt Ca-36, along the Van Duzen R. 19.6 miles east of U. S. 101. 136 Comment
  SD225007  Mentha pulegium G. K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2115 Mendocino State Hwy 128, 1.5 mi SE of Boonville, in Anderson Valley. 152 Comment
  RSA715229  Mentha spicata George K. Helmkamp, E. A. Helmkamp 2005-9-1 9824 El Dorado Northern Sierra Nevada Foothills: E of Sacramento; Sand Canyon Road, 0.3 mi E of CA Highway 49 and Logtown Ridge. 280 Comment
  UCR209706  Mentzelia laevicaulis George K. Helmkamp, E. A. Helmkamp 2009-8-4 15373 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 1787 Comment
  SD143863  Mentzelia longiloba var. longiloba G. K. Helmkamp, E. Helmkamp 1998-1-24 2575 Imperial Between Hwy I-8 & the All-American Canal across from the Brock Research Center (ca. 3 mi. east of the jct of Hwy CA-98 with Hwy I-8). 46 Comment
  UCR30091  Mentzelia obscura George K. Helmkamp 1983-4-5 483- 25 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  UCD117391  Mentzelia pectinata G. K. Helmkamp; E. A. Helmkamp 2001-4-27 6500 Kern Tehachapi Mtns Hart Flat turnoff from Calif. Hwy 58. 884 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
  SD224810  Mesembryanthemum nodiflorum G. K. Helmkamp 1998-4-4 3097 San Bernardino Mojave Desert: Dale Lake, 1.8mi W of Iron Age Rd & 0.7 mi. N of CA hwy 62 366 Comment
  UCR188172  Micropus californicus George K. Helmkamp, E. A. Helmkamp 2007-4-30 11892 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 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
  UCR173344  Micropus californicus var. californicus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10383 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR257159  Micropus californicus var. californicus George K. Helmkamp 2014-4-17 22769 Yuba Sierra Nevada Foothills, Hammonton-Smartsville Road, 0.7 mile southwest of its junction with CA-20, c. 0.65 mi. due S of Smartsville 264 Comment
  CLARK-A1045-155  Microseris elegans George K. Helmkamp 1978-6-1 Riverside Santa Ana Mountains vernal pool near origin of creek; Wildomar 7.5'Q Comment
  UCR122408  Microseris lindleyi George K. Helmkamp, E. A. Helmkamp 2002-4-24 7533 Madera Western Sierra Nevada foothills, Auberry Rd (Rd 200/North Fork Rd.) 5.0 mi south of North Fork 503 Comment
  SD236375  Microsteris gracilis G. K. Helmkamp, E. A. Helmkamp 2008-3-18 13199 Calaveras Sierra Nevada Mountains Foothills: along CA-49 at the crossing of the North Fork of the Calaveras river; 8.3 mi south of Mokelumne Hill. 235 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
  UCR245723  Mimulus George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22259 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Markleeville 1691 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
  UCR129958  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5542 Monterey Outer south coast ranges., Nacimiento Road, 10.4 mi west of Mission Road, just south of Mission San Antonio 457 Comment
  UCR196889  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2008-6-5 13612 El Dorado Sierra Nevada Mountains Foothills, Forbay Road. 0.5 mile north of its crossing of the South Fork American River 668 Comment
  UCR250171  Mimulus aurantiacus var. grandiflorus George K. Helmkamp, Mary Alice Barnes 2013-5-3 20477 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 4.7 miles south of Forest Hill Road, 1.8 mi. east (92 deg. ) of Foresthill 829 Comment
  UCR160298  Mimulus aurantiacus var. pubescens George K. Helmkamp 2004-5-2 8561 Santa Barbara Southern Central Coast, Santa Ynez Mountains, Canada del Refugio Rd., 5. mi N of US-101 488 Comment
  RSA567467  Mimulus bigelovii var. bigelovii George K. Helmkamp 1993-6-16 s.n. Inyo 2 miles S of Pleasant Valley campground, beside the Owens River. 1280 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
  UCR197825  Mimulus breweri George K. Helmkamp, E. A. Helmkamp 2008-7-16 13847 Amador Northern Sierra Nevada Mountains, along CA-88 at Kirkwood 2348 Comment
  UCR230648  Mimulus breweri George K. Helmkamp, E. A. Helmkamp 2011-7-19 17827 A Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR173903  Mimulus guttatus George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-4 10616 El Dorado Northern Sierra Nevada foothills, along Rock Creek Road, 0.1 mile east of its junction with Calif. Hwy 193 387 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
  UCR206709  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2009-3-19 14431 El Dorado Sierra Nevada Mtns. Foothills, Rock Creek Road at the Rock Creek crossing; about 3.5 miles west of Finnon Reservoir 412 Comment
  UCR218120  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2010-6-26 16395 Placer Sierra Nevada Mountains Foothills, Yankee Jim's Road in Bunch Canyon, 0.5 mile southeast of its junction with Canyon Way 591 Comment
  UCR251259  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2012-7-6 19351 El Dorado Northern Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50 2078 Comment
  UCR233310  Mimulus jepsonii George K. Helmkamp, E. A. Helmkamp 2011-9-1 18220 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR170651  Mimulus layneae George K. Helmkamp, E. A. Helmkamp 2005-8-9 9773 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR197532  Mimulus layneae George K. Helmkamp, E. A. Helmkamp 2008-6-23 13708 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
  CLARK-A1045-889  Mimulus mohavensis George K. Helmkamp 1978-4-18 #1; 21 San Bernardino Mojave Desert 5 miles south of Barstow along State Highway 247; Barstow SE 7.5'Q Comment
  RSA794867  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2011-8-19 18115 Alpine Tamarack Road, 0.1 mile east of its junction with Blue Lakes Road. 2485 Comment
  UCR189518  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2007-8-16 12763 Amador Northern Sierra Nevada Mountains, along the south side of Bear River Reservoir just east of the spillway 1777 Comment
  UCD122666  Mimulus nasutus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-29 10273 El Dorado Northern Sierra Neveda foothills: Rock Creek Road, 5.7 mi. E of CA Hwy 193, N of the South Fork of the American River. 426 Comment
  UCD122674  Mimulus nasutus G. K. Helmkamp; E. A. Helmkamp 2007-9-14 12954 Placer Northern Sierra Nevada Mountains. Along Mosquito Ridge Road, 0.4 mile east of Foresthill. 942 Comment
  UCR37652  Mimulus parishii George K. Helmkamp 1984-4-29 A- 24 San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters 701 Comment
  CLARK-A1045-1116  Mimulus primuloides var. pilosellus George K. Helmkamp 1977-9-1 V Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR124179  Mimulus primuloides var. primuloides George K. Helmkamp, E. A. Helmkamp 1998-8-12 4374 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 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
  UCR170801  Mimulus torreyi George K. Helmkamp, E. A. Helmkamp 2005-8-9 9780 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR178666  Mimulus torreyi George K. Helmkamp, E. A. Helmkamp 2006-9-7 11348 El Dorado Northern Sierra Nevada Mountains, Ice House Road. Robbs Valley near Robbs Hut junction 1720 Comment
  UCR207427  Mimulus torreyi George K. Helmkamp, Amy Barnes 2009-7-8 15152 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
  UCD98256  Minuartia californica G. K. Helmkamp; E. A. Helmkamp 2007-3-23 11692 El Dorado Sierra Nevada Mountains, bordering the east end of the Sacramento Valley; Bass Lake Road at the southeast end of Bass Lake. 381 Comment
  UCR101799  Mirabilis californica George K. Helmkamp, E. A. Helmkamp 1997-3-5 1319 Riverside 2.8 mi SE of Gilman Hot Springs 518 Comment
  UCR102915  Mohavea confertiflora George K. Helmkamp, E. A. Helmkamp 1998-2-5 2659 Riverside Sonoran (Colorado) Desert, Indio Hills, 3 mi. east of Thousand Palms & 1.1 mi. N on Amity Rd. 101 Comment
  UCR25531  Mollugo cerviana George K. Helmkamp 1981-9-20 s.n. San Bernardino Mojave Desert, Joshua Tree National Monument, SE of Indian Cove Campground Comment
  UCR241168  Mollugo verticillata George K. Helmkamp, E. A. Helmkamp 2012-10-1 19943 Sacramento Eastern Sacramento Valley, Latrobe Road, 2.4 miles west of the El Dorado County line, N of Rancho Murieta 73 Comment
  UCR253085  Monardella breweri subsp. lanceolata George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 21001 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 1.3 miles east of Pebble Canyon Road, 25 mi. airline ESE (94 deg. ) of Placerville 1819 Comment
  RSA709594  Monardella crispa George K. Helmkamp 2004-3-5 8330 San Luis Obispo Central Coast: 1.0 mi (direct line) south of Oceano airport. 15 Comment
  UCR115823  Monardella glauca George K. Helmkamp, E. A. Helmkamp 2000-7-18 5861 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
  UCR99919  Monardella linoides subsp. sierrae George K. Helmkamp 1997-9-29 2445 Inyo Sierra Nevada Mountains, Onion Valley Road, 7.9 mi west of Hwy US-395 from Independence 2159 Comment
  UCR257749  Monardella odoratissima George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19703 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
  SD237505  Monardella odoratissima subsp. pallida G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15253 El Dorado Sierra Nevada Mountains: Wrights Lake Road, 2.7 miles north of it junction with US-50, c. 0.25 mi. due S of Chimney Flat. 2000 Comment
  UCD125220  Monardella odoratissima subsp. pallida G. K. Helmkamp; E. A. Helmkamp 2007-8-1 12642 Placer Northern Sierra Nevada Mountains: Donner Pass Road between Donner and Norden, about 0.2 mile east of the Nevada County border. 2151 Comment
  UCR196961  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2008-7-16 13837 Alpine Northern Sierra Nevada Mountains, 0.1 mile south of CA-88 on a dead-end spur south of Carson Pass 2595 Comment
  UCR202919  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
  UCR258976  Monardella odoratissima subsp. pallida George K. Helmkamp, Amy Barnes 2014-10-10 23129 Amador Northern Sierra Nevada Mountains, west side of Bear River Reservoir, 0.2 mile north of the dam 1796 Comment
  UCR130727  Monardella purpurea George K. Helmkamp, E. A. Helmkamp 1999-6-27 4953 Santa Clara South Coast Range, Sierra Azul, 5 mi south of San Jose & 1 mi NE of Lake Elsman 427 Comment
  CLARK-A1045-1089  Montia chamissoi George K. Helmkamp 1978-6-10 Mono Owens River damp, grassy area beside River; Arcularius Ranch; ; Crestview 7.5'Q 2163 Comment
  CLARK-A1045-899  Mortonia utahensis George K. Helmkamp 1978-5-6 #1 San Bernardino Mesquite Mountains limestone canyon; Clark Mt. 15'Q Comment
  UCR122165  Mucronea californica George K. Helmkamp, E. A. Helmkamp 2000-4-22 5480 San Luis Obispo Central Coast, Los Osos, between the west end of Howard Ave. and Morro Bay sand dunes 15 Comment
  UCR176430  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2006-7-31 11072 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
  UCR197021  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2008-7-16 13828 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR118956  Muhlenbergia microsperma George K. Helmkamp, E. A. Helmkamp 1998-4-17 3331 San Bernardino Mojave Desert, 18 miles ESE of Baker on Kelbaker Road. 884 Comment
  CLARK-A1045-175  Muilla maritima George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5' Q Comment
  UCD139283  Muilla maritima G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12048 Placer Northern Sierra Nevada Mountains: Along Forest Hill Road, 2.3 miles northeast of Foresthill. 1116 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
  UCR219274  Myosotis laxa George K. Helmkamp, E. A. Helmkamp 2010-7-13 16541 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2492 Comment
  CLARK-A1045-527  Myosurus aristatus George K. Helmkamp 1979-6-22 San Bernardino San Bernardino Mountains north of Forest Service road 3N08, .8 mile east of Van Dusen Canyon Road; drying pool; Big Bear City 7.5'Q Comment
  UCR115437  Myriophyllum sibiricum George K. Helmkamp 1996-9-21 1192 San Luis Obispo Coast Ranges, Santa Margarita Lake, south picnic area 396 Comment
  UCR101132  Nama demissa var. demissa George K. Helmkamp, E. A. Helmkamp 1998-3-19 2950 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  UCR103358  Nama demissa var. demissa George K. Helmkamp, E. Helmkamp 1998-1-24 2599 Imperial Sonoran (Colorado) Desert, 4.2 mi. north of Winterhaven on Picacho Rd, where the road crosses the canal. 91 Comment
  UCR104862  Nama demissa var. demissa George K. Helmkamp 1998-3-30 3046 San Bernardino Mojave Desert, vicinity of Twentynine Palms; Encelia Ave., 1.0 mi. north of Calif. Hwy 62 793 Comment
  SEINET3091556 Image available Nama hispida var. spathulata George K. Helmkamp, E. A. Helmkamp 1998-3-18 2898 Imperial 7 mi. N of Winterhaven on Picacho Rd & 1.7 mi. E on powerline rd. 198 Comment
  CLARK-A1045-1041  Nama rothrockii George K. Helmkamp 1977-7-3 Mono Long Valley US Highway 395; June Lake 7.5'Q Comment
  RSA0115438  Narcissus pseudonarcissus George K. Helmkamp, Elizabeth Helmkamp 2014-2-22 22534 El Dorado Sierra Nevada Mountains Foothills: at Cool, on the east side of CA-49, 0.1 mile north of Georgetown Road/Hwy 193. 465 Comment
  CAS-BOT-BC438834  Nasturtium officinale George K. Helmkamp; Mary Alice Barnes 2013-5-3 20501 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road at the north side of the bridge over West Fork of North Fork American River, 5.2 mi. east (87 deg. ) of Forest Hill. 422 Comment
  CAS-BOT-BC261670  Navarretia capillaris G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10918 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
  UCR197358  Navarretia divaricata subsp. divaricata George K. Helmkamp, E. A. Helmkamp 2008-6-23 13728 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
  UCD106224  Navarretia leptalea G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10900 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
  RSA0012086  Navarretia leucocephala subsp. minima George K. Helmkamp, E. A. Helmkamp 2011-7-26 17873 Nevada 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
  UCR229565  Navarretia leucocephala subsp. minima George K. Helmkamp, E. A. Helmkamp 2011-7-26 17877 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
  UCD118209  Navarretia squarrosa G. K. Helmkamp; E. A. Helmkamp 2007-8-29 12832 Yuba Northern Sierra Nevada Mountains: along Hwy CA-49, 0.5 mile south of Camptonville. 817 Comment
  RSA756066  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-4-4 14489 El Dorado Happy Valley Cut-off, 0.6 mile southeast of its junction with Mt. Aukum Road, c. 1.8 mi due south of Pleasant Valley 591 Comment
  SD197797  Nemophila heterophylla G. K. Helmkamp, E. A. Helmkamp 2007-4-23 11778 Amador Northern Sierra Nevada Mountains: along Bell Road beside Plymouth Creek just east of CA-49 in the vicinity of Enterprise. 302 Comment
  UCR206395  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-3-11 14372 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR233101B  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2011-6-9 17518 A 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
  UCR235601  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2012-4-27 18862 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road north of Placerville, at south side of the crossing of the South Fork American River 401 Comment
  UCR253529  Nemophila heterophylla George K. Helmkamp, Amy Barnes 2014-4-23 22793 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
  UCD119580  Nemophila maculata G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-10 10671 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 6.1 miles north of Hwy US-50. 1653 Comment
  UCR196820  Nemophila maculata George K. Helmkamp 2008-6-17 13688 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
  UCR236914  Nemophila maculata George K. Helmkamp, E. A. Helmkamp 2012-5-28 19072 El Dorado Northern Sierra Nevada Mountains, Pebble Canyon Road, 0.6 mile south of its junction with Mormon Emigrant Trail 1555 Comment
  UCR122524  Nemophila menziesii George K. Helmkamp, E. A. Helmkamp 2001-5-20 6676 Riverside San Jacinto Mountains., Apple Canyon Rd, 1.5 mi NE of CA-74 1463 Comment
  UCR97578  Nemophila menziesii George K. Helmkamp, E. A. Helmkamp 1997-3-8 1411 San Luis Obispo Inner Coast Range, Carrizo Plain; 30.1 mi. NW of Calif. Hwy 166 on Soda Lake Rd., at San Diego Creek Rd near edge of Soda Lake 610 Comment
  UCD120252  Nemophila menziesii var. menziesii G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11791 Amador Northern Sierra Nevada Mountains: along Bell Road beside Plymouth Creek just east of CA-49 in the vicinity of Enterprise. 302 Comment
  UCR161935  Nemophila menziesii var. menziesii George K. Helmkamp, E. A. Helmkamp 2005-3-1 8986 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
  UCR217922  Nemophila menziesii var. menziesii George K. Helmkamp, E. A. Helmkamp 2010-5-22 16098 El Dorado Sierra Nevada Mountains Foothills, Perry Creek Road, 0.1 mile south of its junction with Slug Gulch Road, 0.4 mi. northeast of Fairplay 677 Comment
  UCR208592  Nemophila parviflora var. austiniae George K. Helmkamp, E. A. Helmkamp 2009-5-11 14661 Placer Sierra Nevada Mountains Foothills, Michigan Bluff Road, 0.8 mile south of its junction with Foresthill Road, NE of the city of Foresthill 1159 Comment
  SD241050  Nemophila pulchella var. fremontii George K. Helmkamp, E. A. Helmkamp 2011-4-12 17177 El Dorado Northern Sierra Nevada Mountains Foothills: Placerville, along Forni Road 0.2 mile northwest of its Weber Creek crossing, SE of Hwy 50 near Diamond Springs (Placerville 7.5'Q) 487 Comment
  UCR106674  Nemophila pulchella var. fremontii George K. Helmkamp, E. A. Helmkamp 1998-5-18 3762 Santa Clara Central Coast Range, Mt.Hamilton Rd (Calif. Hwy 130) east of San Jose; 15.2 mi from the W origin of the Hwy 610 Comment
  UCR172653  Nemophila spatulata George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10194 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest; Along Calif. Hwy 193, 1 mi NE of Greenwood 518 Comment
  UCR219152  Nicotiana acuminata var. multiflora George K. Helmkamp, E. A. Helmkamp 2009-9-30 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
  UCR14378  Nicotiana attenuata George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, N of Bishop, 16 mi. north of Tom's Place 2287 Comment
  UCR40583  Oenothera elata George K. Helmkamp 1985-8-22 885- 37 Mono Sierra Nevada Mtns., Mammoth Village 2439 Comment
  UCR82189  Oenothera elata George K. Helmkamp 1994-7-28 105- 8 Mono Sierra Nevada Mtns., Long Valley, along US-395, 1.3 mi east of South Landing turnoff to Crowley Lake 2104 Comment
  RSA747474  Oenothera glazioviana George K. Helmkamp, E. A. Helmkamp 2007-9-30 13041 Sutter Sacramento Valley: Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 8 Comment
  CLARK-A1045-763  Oligomeris linifolia George K. Helmkamp 1978-4-9 San Bernardino Cady Mountains Cave Mt. 15'Q Comment
  SEINET7249316  Onagraceae George K. Helmkamp, Elizabeth Helmkamp 2013-1 Calaveras Comment
  UCR176208  Orthocarpus cuspidatus subsp. cryptanthus George K. Helmkamp, E. A. Helmkamp 2006-8-3 11102 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  CLARK-A1045-1356  Orthocarpus erianthus George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay grassy field beside Turri Road, 3 miles east of Morro Bay; Morro Bay S 7.5'Q Comment
  CLARK-A1045-917  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
  UCR132135  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2000-6-18 5705 Mendocino North Coast, along Calif. Hwy 128, approximately 10 mi east of the coast 274 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
  UCR197591  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2008-5-29 13537 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
  UCR206320  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2009-5-28 14863 Sierra Sierra Nevada Mountains Foothills, above the Yuba River along CA-49, 2.3 miles north of the Yuba Co. line 851 Comment
  UCR230953  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2010-8-7 16745 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trail, at Jim Quinn Spring 2136 Comment
  UCR237360  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2012-6-13 19203 Nevada Northern Sierra Nevada Mountains Foothills, Maybert Road along South Yuba River, 0.6 mi. northeast of the river bridge at Washington 796 Comment
  UCR258140  Osmorhiza chilensis George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19562 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
  UCR176215  Osmorhiza occidentalis George 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
  UCR170975  Oxalis corniculata George K. Helmkamp, E. A. Helmkamp 2005-8-14 9817 El Dorado Northern Sierra Nevada Foothills, Diamond Springs. Lake Oaks mobile home park 521 Comment
  SD234922  Oxalis laxa G. K. Helmkamp, E. A. Helmkamp 2008-4-11 13250 Calaveras Sierra Nevada Mountain Foothills: along Fricot City Road, 1.8 mile NW of CA-49, ca. 4.6 miles (air) SE of San Andreas (Calaveritas 7.5' Q) 387 Comment
  UCR233195  Oxalis laxa George K. Helmkamp, E. A. Helmkamp 2010-4-7 15842 Amador Northeast San Joaquin Valley, along CA-88, 0.9 mile northeast of the San Joaquin County line 84 Comment
  SD232781  Oxytheca dendroidea subsp. dendroidea G. K. Helmkamp 1996-10-17 1256 Mono Disturbed roadisde 0.2 mi south of Benton Hot Springs beside highway CA-120. 1829 Comment
  CLARK-A1045-1081  Oxytheca luteola George K. Helmkamp 1979-6-12 Mono Owens River drying alkaline flat near River, 4.5 miles south of Arcularius Ranch; ; Whitmore Hot Springs 7.5' Q 2133 Comment
  SEINET3285074 Image available Panicum capillare George K. Helmkamp, E. A. Helmkamp 2009-5-24 14798 El Dorado Sierra Nevada Mountains Foothills; Sand Ridge Road, 3.0 miles west of its junction with Bucks Bar Road. 640 Comment
  UCR194724  Panicum capillare George K. Helmkamp, E. A. Helmkamp 2007-10-13 13095 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR247243  Panicum capillare George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22170 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Markleeville 1691 Comment
  UCR241332  Panicum dichotomiflorum George K. Helmkamp, E. A. Helmkamp 2012-9-21 19883 Calaveras Eastern San Joaquin Valley, Jenny Lind Road (Co. Rd J14), 0.2 mile south of its junction with CA-26, WSW of Rancho Calaveras 99 Comment
  CLARK-A1045-224  Panicum urvilleanum George K. Helmkamp 1978-4-1 Riverside Coachella Valley .5 miles south of Interstate highway 10; sandy slope along Bob Hope Drive; Cathedral City 7.5'Q Comment
  SD257320  Papaver rhoeas George K. Helmkamp, Mary Alice Barnes 2013-5-13 20604 Amador Sierra Nevada Mountains: in the town of Pioneer, 0.1 mile west of Pioneer Creek Road along Hwy 88/Carson Pass Hwy (West Point 7.5'Q) 901 Comment
  UCD88736  Paspalum dilatatum G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12564 El Dorado Foothills, northern Sierra Nevada Mountains; Rock Creek Road, 7.1 miles east of its junction with CA-193. 567 Comment
  UCR92524  Paspalum dilatatum George K. Helmkamp 1996-5-27 1103 San Luis Obispo Central Coast, west side of San Luis Obispo, south-facing slope of Bishop Peak 280 Comment
  UCR100357  Pectis papposa George K. Helmkamp 1997-9-30 2486 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR102967  Pectocarya heterocarpa George K. Helmkamp, E. A. Helmkamp 1998-3-16 2827 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-A1045-83  Pectocarya penicillata George K. Helmkamp 1978-4-27 Riverside San Jacinto Mountains .5 mile [north northwest] from CA Highway 74; Hemet 15'Q Comment
  SEINET3084012 Image available Pectocarya setosa G. Helmkamp 1986-4-7 781 San Bernardino Big Morongo Preserve, south of Morongo Valley. East of pipeline road and the upper Desert washTrail 853 Comment
  UCR88206  Pedicularis attollens George K. Helmkamp 1995-9-23 3- 32 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  UCR177008  Pedicularis groenlandica George K. Helmkamp, E. A. Helmkamp 1998-8-12 4371 B Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  RSA666656  Pediomelum californicum George K. Helmkamp, E. A. Helmkamp 6702 San Benito Coalinga Rd., 2 mi. SE of Hernandez. 732 Comment
  UCD170482  Pelargonium grossularioides G. K. Helmkamp; E. A. Helmkamp 2009-5-12 14682 El Dorado Sierra Nevada Mountains Foothills: Lake Oaks Mobile Home Park, Diamond Springs. 530 Comment
  UCR133351  Pellaea mucronata George K. Helmkamp 1993-9-18 29- 06 San Bernardino Mojave Desert, Morongo Valley, canyon at W end of Palo Verde Road, l mi west of Juniper Ave, between Big Morongo Canyon and Dry Morongo Canyon 1070 Comment
  UCR206764  Pellaea mucronata subsp. mucronata George K. Helmkamp, E. A. Helmkamp 2009-3-19 14412 El Dorado Sierra Nevada Mtns. Foothills, Rock Creek Road, 2.4 miles east of its junction with CA-193, above South Fork of American River 430 Comment
  UCR231025  Pellaea mucronata subsp. mucronata George K. Helmkamp, E. A. Helmkamp 2011-6-7 17478 Amador Northern Sierra Nevada Mountains Foothills, Sutter Creek Road, 3.4 miles west of Volcano 491 Comment
  SEINET4560769  Penstemon azureus George K. Helmkamp, E. A. Helmkamp 2010-1 16670 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 1.6 miles west of the junction with Soda Springs Road at Robinson Flat. 2040 Comment
  UCR257132  Penstemon azureus subsp. angustissimus George K. Helmkamp 2014-5-17 22880 Calaveras Sierra Nevada Mountains Foothills, along CA-26, 2.6 miles northeast of CA-49 at Mokelumne Hill 518 Comment
  UCR110963  Penstemon centranthifolius George K. Helmkamp 1998-6-27 4091 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
  UCR129980  Penstemon heterophyllus subsp. australis George K. Helmkamp, E. A. Helmkamp 2001-5-31 6756 Santa Clara San Francisco Bay, 2.0 mi east of Lick Observatory on Mt. Hamilton Rd. 1076 Comment
  UCR28036  Penstemon labrosus George K. Helmkamp 1982-9-17 s.n. Kern 6.8 mi above the snow gate on the road to the Mt. Pinos summit 2287 Comment
  UCR229590  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17922 El Dorado Northern Sierra Nevada Mountains, along North-South Road, 1.6 miles north of its junction with Omo Ranch Road, 0.95 mi. NNW (331 deg. ) of Omo Ranch Rd. jct. with Hwy 88 1460 Comment
  UCR258373  Penstemon laetus subsp. laetus George K. Helmkamp 2014-5-21 22916 El Dorado Sierra Nevada Mountain Foothills, Bucks Bar Road, 0.8 mile northwest of the bridge over North Fork Cosumnes River 605 Comment
  SD247509  Penstemon roezlii George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-10 21003 Amador Northern Sierra Nevada Mountains: Plasse Road toward Silver Lake, 0.3 mile south of CA-88/Carson Pass Hwy (Tragedy Spring 7.5'Q) 2276 Comment
  SEINET4560774  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2010-1 16647 Placer Northern Sierra Nevada Mountains; Forest Hill Road at Hidden Treasure Road, 10.4 miles northeast of the city of Foresthill. 1384 Comment
  UCR233410  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2011-8-6 17963 Amador Northern Sierra Nevada Mountains, Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  UCR134486  Penstemon rostriflorus George K. Helmkamp, E. A. Helmkamp 1998-8-10 4268 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  SEINET3260377 Image available Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2008-8-8 14005 Alpine Northern Sierra Nevada Mountains; along Blue Lake Road, 9.2 miles south of its junction with CA-88. 2512 Comment
  UC2015566  Penstemon rydbergii var. oreocharis G. Helmkamp 1995-9-23 3 -27 Alpine West side of Sonora Pass just beyond the Mono County line. Comment
  UCR197329  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2008-7-11 13786 Amador Northern Sierra Nevada Mountains, Shot Rock Vista picnic area on the south side of CA-88, 0.9 mile east of the junction of Mormon Emigrant Trail 2329 Comment
  UCR219677  Penstemon rydbergii var. oreocharis George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16581 El Dorado Northern Sierra Nevada Mountains, southernmost point of Wright's Lake, 5.6 mi. NE (33 deg. ) of Kyburz 2085 Comment
  UCR121970  Penstemon speciosus George K. Helmkamp, E. A. Helmkamp 1998-8-11 4290 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  UCR175708  Perideridia George K. Helmkamp, E. A. Helmkamp 2006-7-10 10931 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
  UCD127884  Perideridia lemmonii G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12513 Amador Northern Sierra Nevada Mountains: along CA-88, 0.7 mile north of its junction with Mormon Emigrant Trail; Shot Rock trailhead. 2325 Comment
  UCR188508  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2007-7-17 12513 Amador Northern Sierra Nevada Mountains, along CA-88, 0.7 mile north of its junction with Mormon Emigrant Trail; Shot Rock trailhead 2325 Comment
  UCR207440  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2009-7-22 15247 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 2.7 miles north of its junction with US-50, c. 0.25 mi. due S of Chimney Flat 2000 Comment
  UCR237724  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2012-7-14 19378 Amador Northern Sierra Nevada Mountains, Shot Rock Vista Rest Stop along CA-88 (Carson Pass Hwy), 1 mile west of the junction with Mormon Emigrant Trail 2329 Comment
  UCR59837  Perideridia lemmonii George K. Helmkamp 1989-8-1 s.n. Mono Eastern Sierra Nevada Mountains, US Hwy 395, just south of the summit of Devil's Gate Pass 2256 Comment
  SEINET11261936  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2012-4-30 18879 El Dorado Northern Sierra Nevada Mountains Footlhills: Mosquito Road, 0.3 miles N of the bridge over the South Fork American River.; 0 427 Comment
  UCD98377  Petrorhagia dubia G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11820 Amador Northern Sierra Nevada Mountains; along CA E-16, 0.7 mile south of River Pines. 610 Comment
  UCR188157  Petrorhagia dubia George K. Helmkamp, E. A. Helmkamp 2007-5-1 11907 El Dorado Foothills, Northern Sierra Nevada Mountains, access road to South Fork American River along CA-49, 4.4 miles northwest of Coloma 207 Comment
  UCR103559  Phacelia campanularia subsp. vasiformis George K. Helmkamp, E. A. Helmkamp 1997-11-7 2526 San Bernardino Eastern Mojave Desert, Morongo Valley, 49038 Vista Drive 808 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
  UCR101787  Phacelia cicutaria var. hispida George K. Helmkamp, E. A. Helmkamp 1997-3-5 1320 Riverside 2.8 mi SE of Gilman Hot Springs 518 Comment
  UCR122281  Phacelia distans George K. Helmkamp, E. A. Helmkamp 2002-4-15 7358 Santa Barbara Western Transverse Range, Sierra Madre Mountains, Miranda Pine Road, 1.0 mi southeast of CA Hwy 166 549 Comment
  UCR122617  Phacelia distans George K. Helmkamp, E. A. Helmkamp 2000-4-24 5521 Monterey Coast Ranges, Nacimiento-Ferguson Rd., (starts c. 12 mi. north of Gorda) 10.2 mi east of Calif. Hwy 1 at [Slickrock] Creek 457 Comment
  UCR90228  Phacelia distans 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
  SEINET3246145  Phacelia egena G. K. Helmkamp, E. A. Helmkamp 2010-1 16530 Amador Northern Sierra Nevada Mountains: between the west shore of Silver Lake and CA-88; lakeside rest stop area. 2234 Comment
  RSA714086  Phacelia hastata subsp. hastata George K. Helmkamp, E. A. Helmkamp 2005-8-9 9791 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest; west-southwest of Lake Tahoe, 7.4 miles north of Union Reservoir along Ice House Road at the junction of Cheese Camp Road. 1765 Comment
  UCD120485  Phacelia hastata subsp. hastata G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12725 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 1.1 miles south of the lake. 2113 Comment
  RSA792004  Phacelia hastata var. compacta George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18051 Calaveras Black Springs Road (Forest Route 6N45?), 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR189629  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2007-7-27 12637 Placer Northern Sierra Nevada Mountains, Southeast end of Cisco Grove; along local road just before it passes under Interstate-80 1744 Comment
  UCR207115  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2009-7-16 15217 Placer Sierra Nevada Mountains, Forest Hill Road, 26.1 miles northeast of the city of Foresthill, c. 3/4 mi. NW of Sailor Flat 2020 Comment
  UCR215922  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2009-6-29 15064 El Dorado Sierra Nevada Mountains, Ice House Road, 5.5 miles north of its junction with CA-50, c. 10.5 air miles NE (78 deg. ) of Pollock Pines 1520 Comment
  SD234890  Phacelia hastata var. hastata G. K. Helmkamp, E. A. Helmkamp 2007-6-6 12282 El Dorado Northern Sierra Nevada Mountains: Bonetti Road, 3.2 miles south of its junction with Mormon Emigrant Trail, east of Jenkinson Lake and near Diamond Creek. 1189 Comment
  UCR123407  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 1998-8-12 4388 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR191132  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2007-6-12 12315 Placer Northern Sierra Nevada Mountains, Lake Spaulding Road just north of its junction with Hwy CA-20 1610 Comment
  UCR258415  Phacelia hastata var. hastata George K. Helmkamp, Amy Barnes 2014-8-11 22992 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCD120521  Phacelia heterophylla subsp. virgata G. K. Helmkamp 2007-7-7 12471 El Dorado Northern Sierra Nevada Mountains: along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area. 2338 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
  UCR229414  Phacelia hydrophylloides George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18090 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
  CLARK-A1045-872  Phacelia pachyphylla George K. Helmkamp 1978-6-1 #3 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  SEINET12805538  Phacelia ramosissima var. ramosissima George K. Helmkamp, E. A. Helmkamp 2005-1 9573 San Luis Obispo Arroyo Grande to Huasna Road along Arroyo Seco Creek, 7.8 miles northeast of Huasna Townsite Road 333 Comment
  CLARK-A1045-845  Phacelia rotundifolia George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains limestone [slope?]; Clark Mt. 15'Q Comment
  CLARK-A1045-662  Phacelia tanacetifolia George K. Helmkamp 1977-5-29 San Bernardino Cima Kelso 15'Q Comment
  RSA799178  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2011-4-1 17129 Colusa Eastern foothills North Coast Ranges: Antelope Valley, along Maxwell-Sites Road, 0.4 mi southeast of Sites. 93 Comment
  CLARK-A1045-1047  Phacelia vallis-mortae George K. Helmkamp 1978-5-28 Mono Lower Rock Creek ; Casa Diablo Mountain 7.5'Q 1676 Comment
  UCR122576  Phacelia vallis-mortae George K. Helmkamp, E. A. Helmkamp 2001-3-24 6310 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  UCR130725  Phalaris aquatica George K. Helmkamp, E. A. Helmkamp 1999-5-22 4911 San Luis Obispo Central Coast, Los Osos; north of the corner of Buckskin Dr. & Martingale Ave. 61 Comment
  UCR158619  Phalaris aquatica George K. Helmkamp, E. A. Helmkamp 2004-6-20 8652 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
  CLARK-A1045-1343  Phalaris californica George K. Helmkamp 1978-4-23 San Luis Obispo Los Osos Montana de Oro State Park; Morro Bay S 7.5'Q Comment
  UCR58339  Phalaris californica 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
  SD148074  Philadelphus lewisii G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6941 Trinity Trinity Mountains: CA-36, 2.2 mi W of the Trinity/Shasta Co. line. 1159 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
  UCR176527  Phleum alpinum George K. Helmkamp, E. A. Helmkamp 2006-8-14 11232 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  SD148274  Phleum pratense G. K. Helmkamp 2001-7-8 6937 Trinity Trinity Mountains: CA-36, 2.2 mi W of the Trinity/Shasta Co. line. Wet meadow with flowing stream 1159 Comment
  UCR206678  Phlox diffusa George K. Helmkamp, Ann Kerchner 2009-7-25 15300 Alpine Sierra Nevada Mountains, Blue Lakes Road, 8.5 miles south of its junction with CA-88 2491 Comment
  UCR173602  Phlox gracilis George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10163 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
  UCR206389  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-5-19 14719 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 0.2 miles west of its junction with Happy Valley Cutoff road 561 Comment
  UCR206397  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14370 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCR87676  Phlox hoodii subsp. canescens George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 8 -1 Alpine Sierra Nevada Mtns., Monitor Pass, along Calif. Hwy 89 2530 Comment
  UCR134482  Phlox stansburyi George K. Helmkamp, E. A. Helmkamp 1998-8-11 4286 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  IRVC28176  Pholistoma auritum var. auritum G. K. Helmkamp, E. A. Helmkamp 2000-4-24 5495 Monterey Nacimiento Rd. 12 mi N of Gorda and 3.8 mi E of CA-1. Central outer coast ranges. 549 Comment
  SEINET235762  Pholistoma membranaceum G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3666 San Benito Along CA Hwy 25 17.6 miles northeast of the junction with CA Hwy 198. 488 Comment
  UCR102917  Pholistoma membranaceum George K. Helmkamp 1997-3-5 1340 Riverside San Bernardino Mtns./San Gorgonio Pass, Cabazon, 0.5 mi north of I-10 on Millard Pass Rd. 564 Comment
  RSA605410  Phoradendron californicum George K. Helmkamp 1995-11-4 s.n. San Bernardino Morongo Valley, near corner of Pioneer and Juniper 823 Comment
  RSA645539  Phoradendron libocedri George K. Helmkamp 1995-11-16 s.n. Riverside San Jacinto Mountains. along Hwy 243 at Lake Fulmor. [UTM 10km cell: NH-2E, 4N. Black Mtn.] 1616 Comment
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May 4 2018
  SD257382  Phoradendron macrophyllum George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22508 Colusa Sacramento Valley: along CA-20 at the juncton with Alameda Court, 0.2 mile west of the Sacramento River crossing at Meridian (Meridian 7.5'Q) 20 Comment
  UCR91960  Phragmites australis George K. Helmkamp 1996-1-23 996 Imperial Sonoran (Colorado) Desert, Imperial Valley; south edge of Wister Wildlife Area -63 Comment
  UCR159240  Picris echioides George K. Helmkamp, E. A. Helmkamp 2004-6-24 8727 Santa Barbara Central Coast, between Ocean Park [Rd.] and Pacific Ocean at Surf; NW of Lompoc 15 Comment
  UCR189023  Pinus contorta subsp. murrayana George K. Helmkamp, E. A. Helmkamp 2007-8-9 12714 El Dorado Northern Sierra Nevada Mountains, Wright's Lake; south side of the lake at the entrance to the campground 2131 Comment
  SD178110  Pinus coulteri G. K. Helmkamp, E. A. Helmkamp 2002-4-15 7386 Santa Barbara Sierra Madre Mountains: Miranda Pine Road, 8.3 miles southeast of CA 166; beside Miranda Pine Mountain. 1280 Comment
  UCD134889  Pinus ponderosa G. K. Helmkamp; E. A. Helmkamp 2006-10-20 11550 El Dorado Northern Sierra Nevada Mountains: 0.6 mile northwest of Pleasant Valley along Pleasant Valley Road. 755 Comment
  UCD134900  Pinus ponderosa G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12801 El Dorado Northern Sierra Nevada Mountains: Ice House Road at Mile 27.2, 1.1 miles south of Loon Lake. 1899 Comment
  UCR190208  Pinus ponderosa George K. Helmkamp, E. A. Helmkamp 2007-9-4 12897 Amador Northern Sierra Nevada Mountains, west slope, along CA-88 6.2 miles west of Hams Station 1375 Comment
  UCR219656  Pinus sabiniana George K. Helmkamp, E. A. Helmkamp 2009-10-30 15717 El Dorado Sierra Nevada Mountains Foothills, NW edge of Cameron Park, Bass Lake Road at Bass Lake, 2.1 miles north of junction with US-50 378 Comment
  UCR241170  Pinus sabiniana George K. Helmkamp, E. A. Helmkamp 2012-10-3 19958 Sacramento Southeast Sacramento Valley, bike trail parking area at the south side of the American River, 0.6 mile west of Gold Country Road 27 Comment
  UCR232600  Piperia transversa George K. Helmkamp, E. A. Helmkamp 2011-9-1 18196 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz 1280 Comment
  UCR197396  Pityrogramma triangularis George K. Helmkamp, E. A. Helmkamp 2008-4-11 13256 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
  UC2044603  Plagiobothrys austiniae George K. Helmkamp 2013-3-14 20187 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. (Valley Springs SW 7.5' Q.) Comment
  UCR122564  Plagiobothrys collinus George K. Helmkamp, E. A. Helmkamp 1998-4-24 3375 Riverside San Jacinto Mountains, 0.1 mi east of the junction of Calif. Hwy 74 and Calif. Hwy 371, SE side of the mountains 1494 Comment
  SD260229  Plagiobothrys fulvus George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20191 Calaveras Northern Sierra Nevada Mountains Foothills: Along CA-26, 5.1 miles southwest of Mokelumne Hill. 392 Comment
  SD257221  Plagiobothrys fulvus var. campestris George K. Helmkamp 2014-4-17 22742 Nevada Northern Sierra Nevada Mountains Foothills, along CA-120, 2.3 miles west of its junction with CA 49 in Grass Valley. 729 Comment
  UCR238421  Plagiobothrys greenei George K. Helmkamp, E. A. Helmkamp 2012-4-4 18680 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR217398  Plagiobothrys hispidulus George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16303 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 14 miles southeast of junction with Sly Park Road at Jenkinson Lake 1662 Comment
  CAS-BOT-BC174786  Plagiobothrys nothofulvus G. K. Helmkamp; E. A. Helmkamp 2008-4-11 13254 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
  CLARK-A1045-165  Plagiobothrys nothofulvus George K. Helmkamp 1979-4-27 Riverside Santa Ana Mountains head of De Luz Creek; Wildomar 7.5'Q Comment
  UCD120897  Plagiobothrys nothofulvus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-6 10140 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
  UCR122415  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2002-4-24 7539 Madera Western Sierra Nevada foothills, Auberry Rd (Rd 200/North Fork Rd.) 5.0 mi south of North Fork 503 Comment
  SEINET3238910 Image available Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2008-5-4 13378 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
  UCR97560  Plagiobothrys tenellus George K. Helmkamp, E. A. Helmkamp 1997-3-8 1430 San Luis Obispo South Coast Range, along CA Hwy 58 west of Navajo Creek, west of Carrizo Plain 564 Comment
  UCR207869  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2009-4-22 14577 Placer Sierra Nevada Mountains Foothills, Rucky Chuck Rd. (dirt) 1.2 miles southeast of Forest Hill Road 448 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
  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
  SEINET959166  Plantago lanceolata G. K. Helmkamp, E. A. Helmkamp 2005-1 9700 El Dorado Northern Sierra Nevada Foothills: 30 mi Sw of Lake Tahoe; 1 mi E of Jenkinson Lake along Mormon Emigrant Road (County Highway 5) (Sly Park7.5' Q.) 1219 Comment
  UCR161294  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 2005-3-9 9093 San Luis Obispo Outer Central Coast Hills, Irish Hills; See Canyon, 1.0 mi N of San Luis Bay Drive 43 Comment
  RSA0115334  Plantago major George K. Helmkamp, E. A. Helmkamp 2012-10-9 20012 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
  SD143748  Plantago ovata G. K. Helmkamp, E. Helmkamp 1998-1-23 2561 Imperial 18.8 miles northwest of Westmoreland. 29 Comment
  UCR100859  Plantago ovata George K. Helmkamp, E. A. Helmkamp 1998-3-18 2869 Imperial Sonoran (Colorado) Desert, between Hwy I-8 & the All-American Canal across from the Brock Research Center (c. 3 mi. east of the junction of Hwy Calif Hwy 98 with I-8) 46 Comment
  UCR121907  Plantago ovata George K. Helmkamp, E. A. Helmkamp 2002-4-19 7444 Monterey Santa Lucia Mountains, Los Burros Rd. (N of Gorda); 0.9 mi east of Calif. Hwy 1 122 Comment
  SBBG128847  Platanthera dilatata var. leucostachys G. K. Helmkamp, E. A. Helmkamp 2010-9-1 16910 Amador Dufrene Rd 0.7 mi E of its jct with CA-88, N of Lower Bear River Reservoir 2044 Comment
  SD236133  Platanthera dilatata var. leucostachys G. 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 1712 Comment
  UCD139006  Platanthera dilatata var. leucostachys G. K. Helmkamp; E. A. Helmkamp 1998-8-10 4352 Inyo Eastern High Sierra Mountains: Onion Valley, west of Independence. 854 Comment
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Apr 16 2015
  UCR67448  Platanthera dilatata var. leucostachys George K. Helmkamp 1990-8-2 s.n. Mono Eastern Sierra Nevada Mountains, between Mammoth and Lake Mary 2591 Comment
  CAS-BOT-BC523895  Platanthera dilatata var. leucostachys George K. Helmkamp; Ann Kerchner; Amy Barnes 2012-7-23 19504 Sierra Field redacted by CAS, contact the data manager for more information 1770 Comment
  UCR200864  Platanthera leucostachys George K. Helmkamp, E. A. Helmkamp 2008-9-15 14118 Placer Northern Sierra Nevada Mountains, along Foresthill Road 20 miles northeast of the city of Forest Hill 1707 Comment
  UCR91812  Platystemon californicus George K. Helmkamp 1996-5-25 1053 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
  SEINET780299  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2002-4-23 7601 San Benito Inner South Coast ranges; County Hwy. J-1 (Panoche Rd.) 15.6 miles SE of its junction with CA-25; along Tres Pinos Creek. 671 Comment
  UCR106707  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 1998-5-18 3775 Santa Clara Central Coast Range, Mt.Hamilton Rd (Calif. Hwy 130) east of San Jose; 15.2 mi from the W origin of the Hwy 610 Comment
  UCR122182  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2002-4-23 7601 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
  UCD137564  Plectritis ciliosa G. K. Helmkamp; E. A. Helmkamp 2007-5-7 11969 El Dorado Northern Sierra Nevada Mountains. Along CA-49, 6.1 miles NW of Placerville. 454 Comment
  UCR185232  Plectritis ciliosa subsp. ciliosa George K. Helmkamp, E. A. Helmkamp 2007-4-23 11788 Amador Foothills, Northern Sierra Nevada Mountains, along Bell Road beside Plymouth Creek just east of Calif. Hwy 49 in the vicinity of Enterprise 302 Comment
  UCR250625  Plectritis ciliosa subsp. ciliosa George K. Helmkamp, Mary Alice Barnes 2013-4-24 20398 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26 (West Point-Pioneer Rd.), at the west side of the bridge over North Fork Mokelumne River 654 Comment
  UCR127107  Plectritis ciliosa subsp. insignis George K. Helmkamp, E. A. Helmkamp 1998-5-19 3822 Monterey Central Coast Ranges, Salinas Valley Quinado Cyn., 12 mi south of King City along (G-14) Jolon Road 412 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
  UCR89829  Pleurocoronis pluriseta George K. Helmkamp 1994-3-10 42 20 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
  UCR207842  Poa annua George K. Helmkamp, E. A. Helmkamp 2009-3-26 14454 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  UCR233103B  Poa annua George K. Helmkamp, E. A. Helmkamp 2010-3-26 15782 Sacramento Southern Sacramento Valley, Pony Brown Road, 0.7 mi. east of its junction with Ione Road, 2.3 miles NW (338 deg. ) of Eagle's Nest Airport 81 Comment
  UCR185218  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2007-4-23 11785 Amador Foothills, Northern Sierra Nevada Mountains, along Bell Road beside Plymouth Creek just east of Calif. Hwy 49 in the vicinity of Enterprise 302 Comment
  UCR208558  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2009-5-11 14658 Placer Sierra Nevada Mountains Foothills, junction of Forest Hill Road and Chicken Hawk Road, northeast of the city of Foresthill 1338 Comment
  UCR196847  Poa cusickii George K. Helmkamp 2008-6-17 13682 Amador Northern Sierra Nevada Mountains, Bear River Reservoir Road along the south side of Bear River Reservoir 1797 Comment
  UCR88441  Poa epilis George K. Helmkamp, E. A. Helmkamp 1995-6-22 95- 4 -27 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UCR89431  Poa epilis George K. Helmkamp 1990-8-2 s.n. Mono Sierra Nevada Mtns, between Mammoth and Lake Mary 2591 Comment
  UCR248664  Poa nemoralis George K. Helmkamp, E. A. Helmkamp 2012-5-31 19103 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCR246638  Poa pratensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19147 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 5.8 miles south of its junction with CA-88, 6.2 mi. SW (246 deg. ) of Bear River Reservoir dam 1465 Comment
  UCR257193  Poa pratensis subsp. pratensis George K. Helmkamp, Mary Alice Barnes 2013-5-13 20560 El Dorado Sierra Nevada Mountains Foothills, along E-16 (Mt. Aukum Rd.), 3.3 miles north of the Amador County line, near D'Agostini Reservoir 569 Comment
  CAS-BOT-BC444020  Poa secunda George K. Helmkamp; Elizabeth Helmkamp 2013-6-19 20894 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 8.3 miles east of its junction with Hwy E-16 at Jenkinsons Lake. 443 Comment
  SBBG128594  Poa secunda G. K. Helmkamp, E. A. Helmkamp 2012-5-28 19074 El Dorado Pebble Cyn Rd, 0.6 mi S of its jct with Mormon Emigrant Trail 1555 Comment
  SD239540  Poa secunda George K. Helmkamp, E. A. Helmkamp 2012-4-27 18852 El Dorado Foothills, northern Sierra Nevada Mountains: Mosquito Road north of Placerville, at south side of the crossing of the South Fork American River (Slate Mountain 7.5Q) 401 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
  UCR198565  Poa secunda subsp. juncifolia George K. Helmkamp, E. A. Helmkamp 2008-6-9 13621 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
  UCR157805  Poa secunda var. secunda George K. Helmkamp, E. A. Helmkamp 1998-6-29 4196 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  UCR199056  Poa secunda var. secunda George K. Helmkamp, E. A. Helmkamp 2008-5-8 13413 Calaveras Sierra Nevada Mountains Foothills, along CA-26, 1.7 miles northeast of Glencoe 674 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
  CAS-BOT-BC224892  Polygonum aviculare George K. Helmkamp; E. A. Helmkamp 2010-10-20 17036 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
  OBI37297  Polygonum aviculare G. Helmkamp 1985-4-30 446 San Bernardino Morongo Cyn. SE of Morongo Valley; at the entrance to the Preserve Comment
  RSA0057872  Polygonum aviculare George K. Helmkamp, Elizabeth A. Helmkamp 2013-9-7 22281 Amador 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
  UCR201760  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR219163  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2009-10-21 15695 El Dorado Sierra Nevada Mountains Foothills, Diamond Springs, Canyon Valley Way just south of its junction with Pleasant Valley Road 567 Comment
  UCR230733  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-10-20 17036 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
  UCR231848  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-8-11 16755 Placer Northern Sierra Nevada Mountains, Finning Mill Road, 1.2 miles north of Forest Hill Road, at the crossing of Mill Creek 1085 Comment
  UCR231875  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2010-10-16 17020 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim's Road, 0.5 mile north of Forest Hill Road in Foresthill, near intersection with Mayflower Rd. 948 Comment
  UCR233030  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2011-9-23 18311 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 8.6 miles north of its junction with US-50 1613 Comment
  UCR13972  Polygonum lapathifolium George K. Helmkamp 1973-10-3 s.n. Riverside San Jacinto Mtns., Strawberry Creek, near Idyllwild Comment
  SD239866  Polygonum phytolaccifolium G. K. Helmkamp, E. A. Helmkamp 2007-7-27 12634 Placer Northern Sierra Nevada Mountains: Southeast end of Cisco Grove; along local road just before it passes under Interstat-80 (Cisco Grove 7.5'Q) 1744 Comment
  UCR229483  Polygonum phytolaccifolium George K. Helmkamp, E. A. Helmkamp 2011-7-26 17883 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
  UCR188565  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2007-10-7 13069 Butte Northern Sacramento Valley, East Gridley Road at the west edge of the Feather River bridge 27 Comment
  SBBG133756  Polypodium glycyrrhiza G. K. Helmkamp, E. A. Helmkamp 2012-4-27 18867 El Dorado Mosquito Rd N of Placerville, at S side of the crossing of the S Fork American River 401 Comment
  UCR222568  Polypodium glycyrrhiza George K. Helmkamp, E. A. Helmkamp 2010-6-5 16237 Sonoma North Coast Ranges, River Rd., 9.6 miles west of its junction with US-101, 4.25 mi. ENE (83 deg. ) of Guerneville on slope above the Russian River 12 Comment
  SEINET11261555  Polypodium hesperium George Helmkamp, E. A. Helmkamp 2012-5-5 18924 Placer Northern Sierra Nevada Mountains Foothills on Lake Clementine Road, 1.2 miles W of the junction with Foresthill Road. 0.3 air miles SE (123 degrees) of Clementine Dam on the American River.; 0 396 Comment
  UCR206885  Polypodium hesperium George K. Helmkamp, E. A. Helmkamp 2009-3-7 14349 El Dorado Northern Sierra Nevada Mtns. Foothills, along Rock Creek Road, 5.4 miles west of Finnon Lake; beside Rock Creek 442 Comment
  CDA2347  Polypogon monspeliensis G. K. Helmkamp, E. A. Helmkamp 2004-6-24 8709 Santa Barbara Central Coast; Ocean Park at Surf, NW of Lompoc Comment
  UCR133221  Polypogon monspeliensis George K. Helmkamp 1993-10-5 39- 04 Inyo Owens Valley, Pleasant Valley, north of Bishop, at edge of Owens River 1284 Comment
  UCD162088  Polystichum imbricans subsp. imbricans G. K. Helmkamp; E. A. Helmkamp 2007-8-29 12823 Yuba Northern Sierra Nevada Mountains: Mountain House Road 0.6 miles west of the Sierra Co. line; Sleighville area beside Willow Creek. 1021 Comment
  UCR131850  Polystichum munitum George K. Helmkamp, E. A. Helmkamp 2000-6-18 5728 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCD100113  Portulaca oleracea G. K. Helmkamp; E. A. Helmkamp 2007-8-30 12855 El Dorado Foothills, northern Sierra Nevada Mountains. Prospector Road, 0.1 mile north of Marshall Road near Indian Creek. 268 Comment
  UCR189918  Portulaca oleracea George K. Helmkamp, E. A. Helmkamp 2007-8-30 12855 El Dorado Foothills, northern Sierra Nevada Mountains, Prospector Road, 0.1 mile north of Marshall Road near Indian Creek 268 Comment
  UCR96266  Potamogeton natans George K. Helmkamp 1996-9-21 1194 B San Luis Obispo Santa Margarita Lake 396 Comment
  UCR131922  Potentilla anserina subsp. pacifica George K. Helmkamp 2003-9-8 8125 San Luis Obispo Central Coast, Saltwater ocean inlet 0.2 mile SW of Oceano Airport 6 Comment
  UCR13897  Potentilla biennis George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at and near Big Springs 2195 Comment
  UCR197331  Potentilla drummondii subsp. drummondii George K. Helmkamp, E. A. Helmkamp 2008-7-11 13770 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
  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
  SD235008  Potentilla glandulosa subsp. ashlandica G. K. Helmkamp, E. A Helmkamp 2007-6-8 12287 El Dorado Northern Sierra Nevada Mountains: Bonetti Road, 1.9 miles south of Mormon Emigrant Trail, at the bridge over Diamond Creek (Sly Park 7.5' Q) 1143 Comment
  SD148079  Potentilla glandulosa subsp. glandulosa G. K. Helmkamp, E. A. Helmkamp 2000-4-21 5425 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
  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
  UCR179335  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2006-8-24 11290 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 3.8 miles north of Wentworth Springs Road 1616 Comment
  UCR207037  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2009-6-11 14949 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
  UCR253105  Potentilla glandulosa subsp. reflexa George K. Helmkamp, Elizabeth Helmkamp 2013-7-31 22060 El Dorado Northern Sierra Nevada Mountains, junction of Ice House Road and Forestry Route 13N21, 0.9 mile south of the northern junction of Ice House Road and Wentworth Springs Road 1701 Comment
  UCR176314  Potentilla gracilis George K. Helmkamp, E. A. Helmkamp 2006-7-10 10893 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
  SBBG123112  Potentilla gracilis var. fastigiata G. K. Helmkamp with E. A. Helmkamp 2006-6-12 12351 Nevada Bowman Lake Rd 0.6 mi N of Hwy 20 at border of Placer County 1387 Comment
  UCR188476  Potentilla gracilis var. fastigiata George K. Helmkamp, E. A. Helmkamp 2007-7-17 12528 Amador Northern Sierra Nevada Mountains, along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake 2317 Comment
  UCR197039  Potentilla gracilis var. fastigiata George K. Helmkamp, E. A. Helmkamp 2008-7-16 13831 Alpine Northern Sierra Nevada Mountains, along CA-88, 0.8 mile northeast of Carson Pass 2534 Comment
  UCR248364  Potentilla gracilis var. fastigiata George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21013 Amador Northern Sierra Nevada Mountains, Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 Comment
  UCR257809  Potentilla gracilis var. fastigiata George K. Helmkamp, Amy Barnes 2012-8-12 19631 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
  UCR257876  Potentilla gracilis var. fastigiata George K. Helmkamp, Amy Barnes 2012-8-12 19583 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  HSC79208  Prosopis glandulosa G. K. Helmkamp 1984-4-20 40 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
  UCR106474  Prunella vulgaris var. lanceolata George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2179 Mendocino North Coast, along the Navarro River, 7 mi east of US-1. 30 Comment
  UCR231856  Prunella vulgaris var. lanceolata George K. Helmkamp, E. A. Helmkamp 2010-8-11 16763 Placer Northern Sierra Nevada Mountains, Finning Mill Road, 2.3 miles north of Forest Hill Road at the crossing of McBride Creek 1082 Comment
  SD235010  Prunus emarginata G. K. Helmkamp, E. A Helmkamp 2008-8-20 14028 Placer Northern Sierra Nevada Mountains: Donner Pass Road on the west side of Donner Pass and East of Norden (Norden 7.5' Q) 2149 Comment
  SEINET1908793  Prunus emarginata G. K. Helmkamp, E. A. Helmkamp 2008-1 13642 El Dorado Northern Sierra Nevada Mountains: Cat Creek Road, 0.1 mile north of its junction with CA-88, jct. is 4.2 miles east of Cook's Station (Peddler Hill 7.5'Q) 1661 Comment
  SD193354  Prunus ilicifolia subsp. ilicifolia G. K. Helmkamp, Elizabeth Helmkamp 2005-5-12 9443 Monterey 8.0 miles west of U. S. 101 on Highway CA-G-18 in Hames Valley. 341 Comment
  UCD113529  Prunus virginiana var. demissa G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10560 El Dorado Northern Sierra Nevada Foothills; along Highway US-50 at Bridal Veil Farms, east of Pacific House. 1002 Comment
  RSA782375  Pseudobahia heermannii George K. Helmkamp, E. A. Helmkamp 2010-4-24 15941 El Dorado Oak Ridge Road just east of its junction with Blend-O-Green Way, jct. is north of Green Valley Road. 390 Comment
  UC2015363  Pseudobahia heermannii G. K. Helmkamp, E. A. Helmkamp 2009-3-19 14414 El Dorado Sierra Nevada Mtns. Foothills: Rock Creek Road, 2.4 miles east of its junction with CA-193, above South Fork of American River Comment
  UCR240954  Pseudognaphalium canescens subsp. beneolens George K. Helmkamp, E. A. Helmkamp 2012-9-25 19906 Placer Northern Sierra Nevada Mountains, Blue Canyon Road, 1.1 miles south of its intersection with I-80, c. 1/2 mi. south of Blue Canyon-Nyack Airport 1473 Comment
  UCR241738  Pseudognaphalium canescens subsp. beneolens George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19805 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
  SBBG128973  Pseudognaphalium thermale G. K. Helmkamp, E. A. Helmkamp 2010-8-26 16832 Nevada S Fork Yuba River, Forest Route 85 (Fordyce Lake Rd) N of Hampshire Rocks Rd and I-80, 1 mi NNW (351 deg) of Cisco 1634 Comment
  UCD135117  Pseudotsuga menziesii var. menziesii G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10582 El Dorado Northern Sierra Neveda Mountains, Wright's Lake Road just north of Hwy. US-50. 1664 Comment
  UCR23239  Psoralea rigida George K. Helmkamp 1981-7-27 s.n. Riverside San Jacinto Mtns, Beside Hwy 371, 200 yards SW of junction with Hwy 74. Burnt Valley area 1372 Comment
  RSA615436  Psorothamnus polydenius George K. Helmkamp 1997-9-30 2483 Inyo East side of White Mountains. 1707 Comment
  SEINET4691672  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2010-1 16800 Placer Northern Sierra Nevada Mountains: American Hill Road, 1.2 miles south of its junction with Foresthill Road. 1567 Comment
  UCR173782  Pteridium aquilinum var. pubescens George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10578 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road just north of Hwy US-50 1665 Comment
  UCR248676  Pteridium aquilinum var. pubescens George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21030 Amador Northern Sierra Nevada Mountains, Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 Comment
  UCR253580  Pteridium aquilinum var. pubescens George K. Helmkamp, Amy Barnes 2013-9-23 22319 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  CLARK-A1045-663  Purshia glandulosa George K. Helmkamp 1977-5-29 San Bernardino Cima Kelso 15'Q Comment
  UCR98129  Purshia glandulosa George K. Helmkamp, E. A. Helmkamp 1997-4-29 1669 San Bernardino Mojave Desert, Kingston Mtns, Smith Talc Rd. west of the summit, between Beck Spring & Crystal Spring 1350 Comment
  UCR122125  Quercus agrifolia George K. Helmkamp 2002-4-20 7468 San Luis Obispo Central Coast, Los Osos, 0.2 mile northwest of Monarch Lane 9 Comment
  SD262288  Quercus durata var. durata George K. Helmkamp, E. A. Helmkamp 2011-11-20 18465 El Dorado Northern Sierra Nevada Mountains Foothills: Salmon Falls Road at south end of bridge over the American River. 160 Comment
  UCR67040  Quercus kelloggii George K. Helmkamp 1990-10-4 M- 8 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  SEINET3238886 Image available Quercus wislizeni var. wislizeni George K. Helmkamp, E. A. Helmkamp 2008-3-12 13176 Amador Sierra Nevada Mountains Foothills; along Tonzi Road 0.3 miles west of its junction with CA-49, west of Sutter Creek 360 Comment
  UCR191051  Quercus wislizeni var. wislizeni George K. Helmkamp, E. A. Helmkamp 2007-7-23 12570 El Dorado Northern Sierra Nevada Mountains Foothills, Rock Creek road, 7.1 miles east of its junction with CA-193 567 Comment
  UCR197496  Quercus wislizeni var. wislizeni George K. Helmkamp, E. A. Helmkamp 2008-3-22 13226 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, along CA-26, 3.7 miles southwest of Valley Springs at Lime Creek Road 143 Comment
  UCR253569  Quercus wislizeni var. wislizeni George K. Helmkamp 2014-3-18 22584 San Joaquin Eastern San Joaquin Valley, Collier Road, 0.2 mile west of its junction with CA-88, c. 2 miles west of Comanche Reservoir 43 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
  UCR189496  Ranunculus George K. Helmkamp, E. A. Helmkamp 2007-3-22 11678 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
  UCD95820  Ranunculus alismifolius var. alismellus G. K. Helmkamp; E. A. Helmkamp 2006-7-7 10858 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 4.1 miles north of Hwy US-50. 2049 Comment
  SD241161  Ranunculus bonariensis var. trisepalus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17253 Placer Southern Sacramento Valley: south of Lincoln along Athens Ave., 1.6 mile east of Fiddyment Road, 0.6 mile west of Industrial Ave. (Roseville 7.5'Q) 41 Comment
  CAS-BOT-BC154054  Ranunculus californicus G. K. Helmkamp 2004-4-21 8478 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCD95952  Ranunculus californicus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10379 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 Comment
  UCR107270  Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 1998-5-16 3682 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
  UCR121528  Ranunculus californicus George K. Helmkamp 2002-4-21 7485 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 11.2 mi east of Cambria 396 Comment
  UCR140493  Ranunculus californicus George K. Helmkamp 2004-4-21 8478 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR173302  Ranunculus californicus George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10474 El Dorado Northern Sierra Nevada Foothills, Spring Valley; Telephone Ridge area, NW of Riverton. Brockliss Canyon Road, about 11 mi. NW of junction with Meadowridge Road and Ice House Canyon Road (SSW of Union Valley Reservior, c. 1.4 air mi. N of US Hwy 50) 1189 Comment
  UCR173694  Ranunculus californicus George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10173 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, between N and Middle Forks of the Cosumnes River; Sand Ridge Road, 1.9 mi. east of Calif. Hwy 49 454 Comment
  UCR250682  Ranunculus californicus George K. Helmkamp, Mary Alice Barnes 2013-4-18 20352 Placer Northern Serrra Nevada Mountains Foothills, Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 deg. ) of Colfax 561 Comment
  UCR61755  Ranunculus californicus George K. Helmkamp 1989-4-17 s.n. San Luis Obispo Irish Hills, at the crest of Prefumo Canyon Road 366 Comment
  CAS-BOT-BC378573  Ranunculus californicus var. californicus G. K. Helmkamp 1997-3-8 1463 San Luis Obispo SE of Los Osos; Swift Ranch, starting ca. 2 mi S of Los Osos Vly. Rd. on Clark Vly. Rd. 000000000000000000000000 107 Comment
  RSA0064548  Ranunculus muricatus George K. Helmkamp, E. A. Helmkamp 2008-4-25 13321 El Dorado Junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Georgetown. 674 Comment
  UCD96794  Ranunculus occidentalis G. K. Helmkamp; E. A. Helmkamp 2006-6-10 10688 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
  UCR218147  Ranunculus occidentalis George K. Helmkamp, Amy Barnes 2010-5-7 15981 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
  UCR237024  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2012-4-21 18803 Nevada Northern Sierra Nevada Mountains Foothills, junction of Lime Kiln Road and Wolf Road, 13.5 miles NNW (349 deg. ) of Auburn 515 Comment
  CAS-BOT-BC174778  Raphanus sativus G. 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
  CDA35804  Raphanus sativus G. K. Helmkamp, E. A. Helmkamp 2007-3-14 11621 Sacramento Sacramento Valley; edge of Sierra Nevada foothills.; Latrobe Rd. at Michigan Bar Rd., about 3.5 miles west of Latrobe and 0.3 miles west of the El Dorado County line. Comment
  UCR171024  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2006-2-9 10062 Placer Northern Central Valley, Clark Tunnel Road and Calif. Highway 193, east of Lincoln 113 Comment
  UCR262445  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2011-12-9 18503 Placer Sacramento Valley, Sunset Blvd. West, 5.8 miles west of its junction with Fiddyment Road 29 Comment
  CLARK-A1045-958  Rhamnus californica subsp. cuspidata 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
  UCR187518  Rhamnus californica subsp. tomentella George K. Helmkamp, E. A. Helmkamp 2007-4-20 11759 El Dorado Foothills, Northern Sierra Nevada Mountains, junction of French Creek Road and Lost Creek road just north of Frenchtown 366 Comment
  UCR191038  Rhamnus purshiana George K. Helmkamp, E. A. Helmkamp 2007-6-12 12333 Nevada Northern Sierra Nevada Mountains, Spaulding Lake Road, 0.3 mile north of its junction with Hwy CA-20 1604 Comment
  UCD102156  Ribes cereum var. cereum G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11149 Alpine Northern Sierra Nevada Mountains; Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake. Juncture of meadows, Wood's Creek, and coniferous forest. 2509 Comment
  UCR76373  Ribes malvaceum George K. Helmkamp 1993-3-5 s.n. San Luis Obispo Central Coast, just north of Montana de Oro State Park 30 Comment
  CLARK-A1045-930  Ribes roezlii 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
  UCR123368  Ribes roezlii var. amictum George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6882 Plumas Sierra Nevada Mountains, Calif. Hwy 36, 4.3 mi SW of its junction with Calif. Hwy 89, vicinity of Lake Almanor 1463 Comment
  RSA0024712  Ribes roezlii var. roezlii George K. Helmkamp, Amy Barnes 2009-7-8 15155 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
  UCR200876  Ribes roezlii var. roezlii George K. Helmkamp, E. A. Helmkamp 2008-9-15 14109 Placer Northern Sierra Navada Mountains, along Foresthill Road 26 miles northeast of the city of Forest Hill 1954 Comment
  UCR173725  Robinia pseudoacacia George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10499 El Dorado Northern Sierra Nevada Foothills, Along Calif. Hwy 193, 0.8 mi. N of Kelsey 595 Comment
  UCR237294  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
  UCD115305  Rorippa curvisiliqua G. K. Helmkamp; E. A. Helmkamp 2006-10-20 11553 El Dorado Northern Sierra Nevada Mountain Foothills; 0.6 mile northwest of Pleasant Valley along Pleasant Valley Road. 756 Comment
  UCR232161  Rorippa curvisiliqua George K. Helmkamp, E. A. Helmkamp 2010-8-3 16696 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
  SEINET2442021  Rosa bridgesii George K. Helmkamp, E. A. Helmkamp 2009-8-4 15369 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').; 0 1786 Comment
  UCR209702  Rosa bridgesii George K. Helmkamp, E. A. Helmkamp 2009-8-4 15369 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 1787 Comment
  UCD113785  Rubus laciniatus G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-29 10799 Calaveras Northern Sierra Nevada Foothills; along highway CA-26, 0.2 mile north of West Point. 838 Comment
  UCR131352  Rubus ursinus George K. Helmkamp, E. A. Helmkamp 1999-5-22 4904 San Luis Obispo Central Coast, Los Osos; north of the corner of Buckskin Dr. & Martingale Ave. 61 Comment
  UCR140753  Rubus ursinus George K. Helmkamp 2004-4-14 8451 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR242582  Rudbeckia californica var. californica George K. Helmkamp, E. A. Helmkamp 2010-9-1 16906 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
  SEINET3271608 Image available Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2007-4-27 11871 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
  UCD101025  Rumex acetosella G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10966 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCD101027  Rumex acetosella G. K. Helmkamp; E. A. Helmkamp 2006-10-10 11513 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy. CA-49, 10.4 miles north of the crossing of the South Yuba River. 543 Comment
  UCR173306  Rumex acetosella George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10463 El Dorado Northern Sierra Nevada Foothills, S side of Peavine Ridge; along Meadow Canyon Road, 3.4 mi. west of its junction with Ice House Canyon Road (N of US Hwy 50 and SSE of Union Valley Reservoir) 1189 Comment
  UCR173534  Rumex acetosella George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10403 Nevada Northern Sierra Nevada Foothills, San Juan Ridge area at North Columbia, c. 9.3 mi. east of Calif. Hwy 49 884 Comment
  UCR242940  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2011-5-24 17364 El Dorado Northern Sierra Nevada Mountains Foothills, Mesquite Road, 6.3 miles south of its junction with Wentworth Springs Road. 7.2 mi. NW (318 deg. ) of Pollock Pines 1098 Comment
  UCR250640  Rumex acetosella George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20887 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
  UCR122140  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2000-4-21 5450 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  UCR140085  Rumex crispus George K. Helmkamp 2004-2-10 8271 San Luis Obispo Central Coast, southeast of Oceano along Halcyon Rd., 0.2 mi east of Mesa View Dr. 76 Comment
  UCR235410  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2011-11-28 18483 Placer Sacramento Valley, North Brewer Road, 0.2 mile north of Nicolaus Road, 8.7 mi. west of Lincoln 29 Comment
  UCR37621  Rumex hymenosepalus George K. Helmkamp 1984-4-20 840420- 55 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
  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
  RSA0036009  Salix lasiolepis George K. Helmkamp 2013-3-9 20160 Sutter North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  RSA567427  Salix lasiolepis George K. Helmkamp 1993-9-22 34 -19 San Bernardino 6.7 mi. up Burns Canyon from jct of Pioneertown and Pipes Cyn Rds. 1524 Comment
  UCR102573  Salix orestera George K. Helmkamp, E. A. Helmkamp 1997-9-11 2358 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
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