Search Results — 2000 specimen records retrieved (1971 records with coordinates)
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Results for search: Collector=Helmkamp;   

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

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCR179367  Abies concolor var. lowiana George K. Helmkamp, E. A. Helmkamp 2006-9-20 11430 B El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road 3.3 miles north of Hwy US-50 2058 Comment
  RSA755895  Abies magnifica George K. Helmkamp, E. A. Helmkamp 2009-7-2 15087 El Dorado Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR109503  Abronia turbinata George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  UCD60413  Acer macrophyllum G. K. Helmkamp; E. A. Helmkamp 2007-4-27 11860 El Dorado Northern Sierra Nevada Mountains: Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House. 1027 Comment
  UCR131858  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2000-6-18 5738 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR218754  Achillea millefolium George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16325 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
  UCR242808  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2011-6-17 17588 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 0.1 mile south of the Amador County line at the bridge over the North Fork Mokelumne River, 1.77 mi. SE (112 deg. ) of Pioneer 652 Comment
  RSA0013410  Achnatherum lemmonii var. lemmonii George K. Helmkamp, E. A. Helmkamp 2012-5-22 19036 El Dorado Silver Fork Road, 0.9 mile south of US-50 in Kyburz 1381 Comment
  UCR170822  Achnatherum occidentale subsp. pubescens George K. Helmkamp, E. A. Helmkamp 2005-8-9 9787 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR241810  Achnatherum occidentale subsp. pubescens George K. Helmkamp, E. A. Helmkamp 2012-9-25 19930 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 1.2 miles north of CA-20, N of I-80 between Grass Valley and Truckee 1427 Comment
  UCR216931  Achyrachaena mollis George K. Helmkamp, E. A. Helmkamp 2010-5-4 15946 Solano Sacramento Valley, just NE of Vacaville, north side of Vaca Valley Parkway, 0.1 mile west of its junction with Crescent Drive 35 Comment
  UCR104870  Achyronychia cooperi George K. Helmkamp 1998-3-30 3003 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR123982  Achyronychia cooperi George K. Helmkamp, E. A. Helmkamp 2001-3-30 6389 San Bernardino Mojave Desert, CA Hwy 62, 16.2 mi east of Utah Trail (Twentynine Palms) near Dale Lake 366 Comment
  UCR30097  Achyronychia cooperi George K. Helmkamp 1983-4-5 483 37 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  CHSC118015  Acmispon americanus var. americanus G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12572 El Dorado Foothills, northern Sierra Nevada Mountains: Along Hwy CA-193, 1.0 mile south of Georgetown. 771 Comment
  UCD103820  Acmispon americanus var. americanus G. K. Helmkamp; E. A. Helmkamp 2005-7-31 9727 El Dorado Northern Sierra Nevada Foothills: Junction of Ice House Road and CA Highway 50 (E of Pollock Pines). 1006 Comment
  UCD104058  Acmispon brachycarpus G. K. Helmkamp; Elizabeth Helmkamp 2006-4-29 10257 El Dorado Northern Sierra Neveda Foothills: Rock Creek Road, 0.9 mi. E of CA Hwy 193. 415 Comment
  SD243129  Acmispon nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-9-3 18363 Nevada Northern Sierra Nevada Mountains: small, open flat along CA-20, 2.6 miles west of its junction with Lowell Hill Road (Washington 7.5'Q) 1581 Comment
  UCD98792  Aconogonon phytolaccifolium G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11171 El Dorado Northern Sierra Nevada Mountains. Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road. 2250 Comment
  UCR233063  Acroptilon repens George K. Helmkamp, E. A. Helmkamp 2011-5-12 17278 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR122918  Adenostoma fasciculatum George K. Helmkamp, E. A. Helmkamp 2001-5-29 6720 San Benito South Coast Range, Gabilan Range, 7.1 mi. south of San Juan Bautista on Hwy G-1 488 Comment
  RSA748976  Adiantum jordanii George K. Helmkamp, E. A. Helmkamp 2007-4-30 11897 El Dorado hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  SD240800  Aegilops triuncialis George K. Helmkamp, E. A. Helmkamp 2011-6-17 17613 Amador Northern Sierra Nevada Mountains Foothills: junction of Pine Grove to Volcano Road and Aqueduct Road, 0.76 mi. ENE (86a^z) of Pine Grove (Pine Grove 7.5'Q) 776 Comment
  UCR242647  Agoseris George K. Helmkamp, E. A. Helmkamp 2010-4-3 15802 Amador Low foothills northern Sierra Nevada Mountains, 4.35 mi. NE (31 deg. ) of Ione, junction of Tonzi Road and CA-124/East Plymouth Hwy 180 Comment
  UCR87842  Agoseris George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 8 -12 Alpine Sierra Nevada Mtns., Monitor Pass, along Calif. Hwy 89 2530 Comment
  UCR189610  Agoseris glauca var. laciniata George K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-6-20 12383 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
  UCR106672  Agoseris grandiflora George K. Helmkamp, E. A. Helmkamp 1998-5-18 3764 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
  UCR127138  Agoseris heterophylla George K. Helmkamp, E. A. Helmkamp 1998-5-19 3834 Monterey Salinas Valley, 3.7 mi south of Lockwood on G-14, Interlake Road near northwest end of Lake San Antonio 320 Comment
  UCD128620  Agoseris monticola G. K. Helmkamp; E. A. Helmkamp 2006-8-30 11308 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of CA-88 and generally SE of Caples Lake; beside Woods Creek. 2521 Comment
  UCR141002  Agoseris retrorsa George K. Helmkamp 2004-4-23 8506 Santa Barbara San Rafael Mountains, Figueroa Mountain, VABM lookout tower north of Figueroa Mountain Rd. 1372 Comment
  UCR14526  Agropyron cristatum George K. Helmkamp 1974-6-8 s.n. Mono Eastern Sierra Nevada, US Hwy 395 at Tom's Place, north of Bishop [near Lk. Crowley] 2149 Comment
  SEINET9258901  Agrostis exarata George K. Helmkamp, Elizabeth Helmkamp 2013-1 20981 Amador Northern Sierra Nevada Mountains: Bear River Road at the south end of the dam for Lower Bear River Reservoi 1783 Comment
  UCR237342  Agrostis exarata George K. Helmkamp, E. A. Helmkamp 2012-6-13 19168 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  SEINET4178673 Image available Agrostis gigantea George K. Helmkamp, E. A. Helmkamp 2010-8-3 16703 Calaveras Northern Sierra Nevada Mountains: Forest Route 7N23, 0.1 mile north of junction with CA-4. 2004 Comment
  UCR121946  Agrostis idahoensis George K. Helmkamp, E. A. Helmkamp 2000-7-19 5916 Inyo Sierra Nevada Mountains, Mosquito Flat, 0.9 mi south of Rock Creek Lake, beside Rock Creek 3140 Comment
  UCR197547  Agrostis idahoensis George K. Helmkamp, E. A. Helmkamp 2008-7-16 13848 Amador Northern Sierra Nevada Mountains, along CA-88 at Kirkwood 2348 Comment
  SEINET2473459 Image available Agrostis pallens George K. Helmkamp, E. A. Helmkamp 2007-1 12923 El Dorado Northern Sierra Nevada Mountains; along Hwy US-50, 0.4 mile southwest of Phillips Comment
  SEINET244291  Agrostis scabra George Helmkamp, E. A. Helmkamp 1997-9-10 2315 Mono Sierra Nevada Mountains; 4.9 mi SW of CA-120 on Sagehen Meadows Rd. 2591 Comment
  UCR170811  Agrostis scabra George K. Helmkamp, E. A. Helmkamp 2005-8-9 9782 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR241351  Agrostis scabra George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19812 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
  UCR257823  Agrostis scabra George K. Helmkamp, Amy Barnes 2012-8-19 19656 El Dorado Northern Sierra Nevada Mountains, northwest side of Ice House Road, 0.2 mile north of its junction with Forest Route 13N20, c 1.3 miles northeast of Wentworth Springs Road 1787 Comment
  UCR233161B  Agrostis stolonifera George K. Helmkamp, E. A. Helmkamp 2011-7-12 17713 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  UCR245717  Agrostis stolonifera George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22211 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 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
  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
  UCR241979  Albizia julibrissin George K. Helmkamp, E. A. Helmkamp 2012-9-7 19777 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
  UCR101119  Aliciella latifolia George K. Helmkamp, E. A. Helmkamp 1998-3-19 2944 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  SEINET2043251 Image available Allionia incarnata George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5360 San Bernardino Colorado River: Beside the California-Arizona border near Topock, AZ. 152 Comment
  CLARK-A1045-1225  Allium atrorubens George K. Helmkamp 1978-5-28 Mono Lower Rock Creek along creek near old State Highway 395, between Bishop and Crowley; ; Casa Diablo Mountain 7.5'Q 1676 Comment
  UCD138505  Allium campanulatum G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11078 El Dorado Northern Sierra Nevada Mountains. Along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy. U.S.-50. 1864 Comment
  UCR87846  Allium campanulatum George K. Helmkamp, E. A. Helmkamp 1995-6-23 s.n. Alpine Sierra Nevada Mtns., Monitor Pass, along Calif. Hwy 89 2530 Comment
  UCR123922  Allium fimbriatum var. mohavense George K. Helmkamp, E. A. Helmkamp 2001-5-2 6657 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
  UCR230968  Allophyllum divaricatum George K. Helmkamp, E. A. Helmkamp 2011-6-7 17473 Amador Northern Sierra Nevada Mountains Foothills, Sutter Creek Road, 3.4 miles west of Volcano 491 Comment
  RSA0053907  Allophyllum integrifolium George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-19 20943 El Dorado Silver Fork Road, 0.8 mile north of Mormon Emigrant Trail and near Jim Quinn Spring, N of Carson Pass Hwy 2116 Comment
  SBBG127566  Allophyllum integrifolium G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15273 El Dorado Wrights Lake Rd, 1.2 mi S of Wrights Lake 2073 Comment
  SEINET4691406  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2010-1 16729 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trial, at Jim Quinn Spring. 2136 Comment
  UCD118027  Allophyllum integrifolium G. K. Helmkamp; Elizabeth Helmkamp 2007-6-20 12402 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail just before its junction with Hwy CA-88. 2265 Comment
  UCR191131  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2007-6-12 12316 Placer Northern Sierra Nevada Mountains, Lake Spaulding Road just north of its junction with Hwy CA-20 1610 Comment
  UCR207449  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2009-7-30 15317 Calaveras Sierra Nevada Mountains, Ottawa Drive, 0.1 mile south of its junction with CA-4, 1.2 miles northeast of Dorrington 1471 Comment
  UCR237716  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2012-7-14 19396 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  SD247349  Alnus incana subsp. tenuifolia George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22243 Alpine Northern Sierra Nevada Mountains: along CA-4, 12.4 miles southwest of the CA-89 junction and just north of Kinney Reservoir. 2540 Comment
  UCR257183  Alnus rhombifolia George K. Helmkamp, E. A. Helmkamp 2013-11-11 22484 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 4.6 miles east of CA-49 in town of Sutter Creek 421 Comment
  UCR106481  Alnus rubra George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2171 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR14892  Alopecurus geniculatus George K. Helmkamp 1975-9-6 s.n. Mono Owens River, Arcularius Ranch 2104 Comment
  UCR230734  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2010-10-20 17037 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
  UCR253798  Amaranthus albus George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20064 San Joaquin San Joaquin Valley, along Hwy J-6 (Escalon-Bellota Road), 1.2 miles south of its junction with CA-26 46 Comment
  UCR258217  Amaranthus albus George K. Helmkamp, Elizabeth Helmkamp 2012-10-20 20054 Placer Sierra Nevada Mountains Foothills, North Auburn; unnamed dirt road on east side of CA-49, between Rock Creek Road and Locksley Lane 387 Comment
  RSA749527  Amaranthus powellii George K. Helmkamp, E. Helmkamp 2008-10-6 14209 Yuba Ostrom #3 Road, 1.2 miles east of junction with CA-65, southeast of Olivehurst 20 Comment
  HSC79252  Ambrosia dumosa G. K. Helmkamp 1984-5-2 - 17 Riverside Big Morongo Canyon, 3-3.5 mi. below the caretaker's house at the Big Morongo Preserve, Little San Bernardino Mtns. 550 Comment
  SD144072  Ambrosia ilicifolia G. K. Helmkamp, E. Helmkamp 1998-3-19 2957 Imperial Colorado Desert: Little Picacho Wash along Picacho Rd. 2.5 mi. S of Picacho State Recreation Area. 152 Comment
  SEINET2052883 Image available Ambrosia salsola George K. Helmkamp, E. A. Helmkamp 1998-2-18 2744 Riverside Chuckwalla Mts., raham Pass Rd. 10.6 mi. SSW of Chuckwalla Valley Rd. 487 Comment
  UCR197032  Amelanchier utahensis George K. Helmkamp, E. A. Helmkamp 2008-7-22 13878 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
  UCR233431  Ammannia coccinea George K. Helmkamp, E. A. Helmkamp 2011-10-8 18383 Glenn Northern Sacramento Valley, Co. Road 61 (Riz Rd.), 2.6 miles east of CA-45 and at the junction with Co. Road V, 8.26 mi. SE (124 deg. ) of Willows 26 Comment
  UCR57535  Ammophila arenaria George K. Helmkamp 1989-8-6 s.n. San Luis Obispo Central Coast, Baywood Park, at the south edge of Morro Bay 3 Comment
  UCR121595  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2002-4-22 7434 San Benito San Andreas rift zone., Bitterwater Valley along Calif. Hwy 25, 17.6 mi north of Calif. Hwy 198 518 Comment
  UCR130976  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 1998-5-13 3539 Kern Southern Sierra Nevada Mtns., Greenhorn Mtns. Foothills, 6.5 mi. SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near Horse Canyon 396 Comment
  UCR140404  Amsinckia intermedia George K. Helmkamp 2004-2-17 8293 San Luis Obispo Central Coast, SE of Oceano along Halcyon Rd, 0.2 mi east of Mesa View Dr (Calif. Hwy 1) 76 Comment
  UCR238923  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2012-2-3 18527 Calaveras San Joaquin Valley/Sierra Nevada Foothills, junction of Paloma Road and Gillam Road, NE of Valley Springs & SE of Pardee Reservoir 285 Comment
  UCR257539  Amsinckia intermedia George K. Helmkamp 2014-4-17 22757 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
  UCR253224  Amsinckia retrorsa George K. Helmkamp, Amy Barnes 2014-4-7 22736 Sacramento Sacramento Valley, along CA-104/Twin Cities Road, WNW of Rancho Seco Nuclear Generating Station 56 Comment
  SD178190  Amsinckia spectabilis var. microcarpa G. K. Helmkamp 2004-3-10 8336 San Luis Obispo Central Coast: Nipomo Mesa, along Pomeroy Rd, 0.2 mi north of Willow Rd, northwest of Nipomo. 91 Comment
  UCR179788  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2006-10-6 11479 Amador Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49, 1.1 miles south of Plymouth 314 Comment
  UCR241978  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2012-9-7 19778 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
  CAS-BOT-BC523897  Anaphalis margaritacea George K. Helmkamp; Amy Barnes 2014-10-10 23135 Amador Northern Sierra Nevada Mountains: West side of Bear River Reservoir, 0.2 mi N of the dam 1795 Comment
  HSC104188  Anaphalis margaritacea G. K. Helmkamp, E. A. Helmkamp 2013-9-7 22268 El Dorado Northern Sierra Nevada Mountains; east side of Mormon Emigrant Trail, 2.7 mi. W of its junction with CA-88/Carson Pass Hwy. 2264 Comment
  SD240830  Anaphalis margaritacea George K. Helmkamp, E. A. Helmkamp 2007-8-1 12657 Nevada Northern Sierra Nevada Mountains: Soda Lake Road in the vicinity of Lake Van Norden, 0.2 mile south of Donner Pass Road (Soda Springs 7.5'Q) 2073 Comment
  UCD128841  Anaphalis margaritacea G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11084 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
  UCR176204  Angelica breweri George K. Helmkamp, E. A. Helmkamp 2006-8-3 11106 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR242342  Angelica breweri George K. Helmkamp, E. A. Helmkamp 2010-7-28 16680 Placer Northern Sierra Nevada Mountains, Forest Hill Road, 1.8 miles east of Forest Route 13/American Hill Road 1662 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
  UCR134500  Angelica lineariloba George K. Helmkamp, E. A. Helmkamp 1998-8-10 4357 Inyo Eastern Sierra Nevada Mountains, Onion Valley, west of Independence 2805 Comment
  UCR174936  Anthemis cotula George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10776 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 12.3 miles east of the Mokelumne Hill turnoff from Calif. Hwy 49 640 Comment
  SD227715  Anthriscus caucalis G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3745 San Mateo Portola Valley: Golden Hills Rd along Trancos Creek. 106 Comment
  SD234781  Anthriscus caucalis G. 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
  UCR188150  Anthriscus caucalis George K. Helmkamp, E. A. Helmkamp 2007-4-30 11900 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR90214  Antirrhinum filipes George K. Helmkamp 1995-5-30 s.n. San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, Morongo Valley, 1 mi west of Twentynine Palms Hwy in the yard of G. Helmkamp, 49038 Vista Dr. 808 Comment
  SEINET3282795 Image available Apocynum androsaemifolium George K. Helmkamp, E. A. Helmkamp 2009-7-16 15208 Placer Sierra Nevada Mountains; Forest Hill Road, 24.6 miles northeast of the city of Foresthill, near Ford Point. 1698 Comment
  UCD121239  Apocynum androsaemifolium G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10960 El Dorado Northern Sierra Nevada Mtns, Mount Ralston Trail and Hwy US-50 about 0.9 mile south of Twin Bridges (Echo Lake 7.5' Q). 1960 Comment
  UCR176068  Apocynum androsaemifolium George K. Helmkamp, E. A. Helmkamp 2006-8-14 11245 Nevada Northern Sierra Nevada Mtns, about 0.7 mile east of Donner Pass along Donner Pass Road 2041 Comment
  UCR189042  Apocynum androsaemifolium George K. Helmkamp, E. A. Helmkamp 2007-7-27 12616 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20 1793 Comment
  UCD95536  Aquilegia formosa G. K. Helmkamp 2007-6-29 12449 Amador Northern Sierra Nevada Mountains: South side of CA-88, 0.1 mile east of Carson spur summit. 2423 Comment
  UCD95538  Aquilegia formosa G. K. Helmkamp; E. A. Helmkamp 2007-8-1 12662 Nevada Northern Sierra Nevada Mountains: near Camp Spaulding; along Lake Spaulding Road 0.4 mile north of its junction with CA-20. 1573 Comment
  UCR234192  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2011-7-7 17650 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  UCR217175  Arabidopsis thaliana George K. Helmkamp, E. A. Helmkamp 2010-5-14 16042 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 1.1 mi. NE (69 deg. ) of Somerset, just west of the bridge over the Cosumnes River 544 Comment
  UCR235442  Arabidopsis thaliana George K. Helmkamp, E. A. Helmkamp 2012-5-15 18975 Calaveras Northern Sierra Nevada Mountains Foothills, along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas 387 Comment
  UCR115831  Arabis drummondii George K. Helmkamp, E. A. Helmkamp 2000-7-18 5872 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
  UCR257883  Arabis hirsuta var. glabrata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19554 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
  UCR134710  Arabis inyoensis George K. Helmkamp, E. A. Helmkamp 1998-8-10 4270 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  CLARK-A1045-1434  Arabis rectissima George K. Helmkamp 1977-8-6 Mariposa Sierra Nevada 2 miles east of Yosemite Creek on the way to Porcupine Flats, dry roadside; ; Yosemite Falls 7.5'Q 2621 Comment
  UCR250161  Arabis rectissima var. rectissima George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20870 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  UCR163036  Arctostaphylos glandulosa George K. Helmkamp 1993-3-5 s.n. San Luis Obispo Central Coast, just north of Montana de Oro State Park 30 Comment
  UCR170824  Arctostaphylos manzanita subsp. manzanita George K. Helmkamp, E. A. Helmkamp 2005-9-30 9942 Placer Northern Sierra Nevada Mtns., Hampshire Rocks Road south of the I-80 Rainbow exit (c. 2 mi east of Cisco Grove) 1805 Comment
  UCR200874  Arctostaphylos patula George K. Helmkamp, E. A. Helmkamp 2008-9-15 14110 Placer Northern Sierra Navada Mountains, along Foresthill Road 26 miles northeast of the city of Forest Hill 1954 Comment
  UCR233307  Arctostaphylos patula George K. Helmkamp, E. A. Helmkamp 2011-9-1 18207 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles south of its junction with US-50 in Kyburz 1447 Comment
  UCD53467  Arctostaphylos pechoensis G. K. Helmkamp; E. K. Helmkamp 2001-4-29 6570 San Luis Obispo Irish Hills; Clark Valley Road; 2.8 miles south of Los Osos Valley Rd. (east of Los Osos). 91 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
  RSA747035  Arctostaphylos viscida subsp. viscida George K. Helmkamp, E. A. Helmkamp 2007-3-5 11596 El Dorado Granite Canyon, along Lotus Road; about 3 miles south of Calif. Hwy 49 372 Comment
  UCD72381  Arctostaphylos viscida subsp. viscida G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11644 Amador Eastern Sacramento Valley: Buena Vista Road, 0.3 mile north of Buena Vista. 104 Comment
  UCR189470  Arctostaphylos viscida subsp. viscida George K. Helmkamp, E. A. Helmkamp 2007-3-11 11616 El Dorado Foothills, Northern Sierra Nevada Mountains, Darling Ridge along Darling Ridge Road. 5.2 miles northeast of the junction of Traverse Creek Road and CA-49 663 Comment
  UCR115580  Arenaria douglasii George K. Helmkamp, E. A. Helmkamp 2000-4-20 5400 San Luis Obispo Central Coast, Prefumo Cyn., 1.2 mi south of Los Osos Valley Rd. 183 Comment
  UCR234590  Arenaria kingii var. glabrescens George K. Helmkamp, E. A. Helmkamp 2011-8-19 18126 Alpine Northern Sierra Nevada Mountains, Tamarack Road, 0.1 mile east of its junction with Blue Lakes Road 2485 Comment
  UCR237723  Arenaria kingii var. glabrescens George K. Helmkamp, E. A. Helmkamp 2012-7-14 19379 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
  UCR21763  Arida arizonica George K. Helmkamp 1980-5-23 s.n. San Bernardino Eastern Mojave Desert, Kelbaker Road [Hwy 127], 2 miles north of Baker 280 Comment
  UCR41045  Arnica chamissonis George K. Helmkamp 1985-8-20 885 -12 Mono Owens Valley, along the Owens River, at Big Springs Campground, 7 air miles NE of Mammoth Lakes, above Arcularius Ranch 2195 Comment
  UCR190484  Arnica parryi George K. Helmkamp, E. A. Helmkamp 2007-8-4 12693 Alpine Northern Sierra Nevada Mountains, Woods Lake Road south of CA-88 at the picnic area just north of the lake 2470 Comment
  UCR252791  Artemisia arbuscula subsp. arbuscula George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22097 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 Comment
  UCR132543  Artemisia californica George K. Helmkamp 2003-8-31 8106 Santa Barbara Central Coast, Casmalia Hills, 4 mi west of Calif. Hwy 1 (south of Guadalupe) along Brown Road 183 Comment
  UCR159338  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2004-7-7 8736 Santa Barbara Central Coast, Termination of San Miguelito Road., 8.7 mi SW of I Street in Lompoc 244 Comment
  UCR171538  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2005-7-31 9723 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR219096  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2009-9-5 15573 Butte Sacramento Valley, Lower Honcut Road, 0.8 mile east of its junction with CA-70, 2.5 mi. WSW (261 deg. ) of Honcut, 6.6 mi. SE (116 deg. ) of Gridley 27 Comment
  UCR67454  Artemisia douglasiana George K. Helmkamp 1990-9-23 I- 17 Modoc Warner Mtns, Goose Lake, within 0.1 mi of the Oregon border 1476 Comment
  UCD129332  Artemisia ludoviciana subsp. incompta G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11130 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
  SEINET5586217  Artemisia tridentata subsp. vaseyana George K. Helmkamp, Elizabeth Helmkamp 2013-1 22171 Alpine Northern Sierra Nevada Mountains: along CA-89, 0.6 mile south of Markleeville. 1691 Comment
  UCR114371  Artemisia tridentata subsp. vaseyana George K. Helmkamp, E. A. Helmkamp 1997-9-8 2274 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR209705  Artemisia tridentata subsp. vaseyana George K. Helmkamp, E. A. Helmkamp 2009-8-4 15372 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
  RSA0012140  Asclepias cordifolia George K. Helmkamp, E. Helmkamp 2011-7-7 17641 El Dorado Park Creek Road, 0.4 mile east of its junction with Old Sly Park Road, southeast of Pollock Pines, 0.7 mi. SSW (191 deg ) of Fresh Pond 1250 Comment
  UCR195086  Asclepias cordifolia George K. Helmkamp, E. A. Helmkamp 2007-5-27 12161 El Dorado Northern Sierra Nevada Mountains Foothills, 0.7 mile down a hiking trail northeast of CA-49; trail starting 3.5 miles northwest of Placerville 430 Comment
  CLARK-A1045-1275  Asclepias eriocarpa George K. Helmkamp 1979-6-6 San Diego Pala Creek along Creek, 3 miles north of Pala; Pechanga 7.5'Q Comment
  UCR160928  Asclepias eriocarpa George K. Helmkamp, E. A. Helmkamp 2005-6-12 9652 San Luis Obispo Central Coast Range, along Calif. Hwy 58 (Carrizo Hwy), 22.2 miles east of Santa Margarita; near Camatta Creek 552 Comment
  UCR182143  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2006-10-23 11561 Amador Central Valley/ Northern Sierra Nevada Foothills, along Calif. Hwy 16, 0.2 mile east of Waits Station, southwest of Plymouth 305 Comment
  UCR247240  Aster eatonii George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22180 A Alpine Northern Sierra Nevada Mountains, along CA-89, 0.1 mile east of its junction with CA-4, Monitor Creek 1747 Comment
  UCR252801  Aster eatonii George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22081 El Dorado Northern Sierra Nevada Mountains, Mehrten Spring Road, 0.5 mile north of CA-88/Carson Pass Hwy 1793 Comment
  RSA750422  Aster foliaceus var. parryi George K. Helmkamp, E. A. Helmkamp 2008-8-30 14067 El Dorado along Mormon Emigrant Trail at Leek Spring, about 2 miles northwest of its junction with CA-88 2238 Comment
  UCR230956  Aster foliaceus var. parryi George K. Helmkamp, E. A. Helmkamp 2010-8-7 16750 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
  UCR13969  Aster frondosus George K. Helmkamp 1973-9-25 s.n. San Bernardino San Bernardino Mtns, Big Bear Lake 2058 Comment
  UCR229424  Aster integrifolius George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18079 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  UCR201924  Aster occidentalis George K. Helmkamp, E. A. Helmkamp 2008-8-30 14043 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail 2.4 miles northwest of its junction with CA-88 2271 Comment
  RSA715290  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2005-9-23 9925 El Dorado Northern Sierra Nevada Mts.: Wright's Lake Tie Road (Forest Road 32) 1 mile west of its junction with Wright's Lake Road (Forest Road 4) NNE of Kyburz 2043 Comment
  UCR170331  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9925 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Tie Road (Forest Road 32) 1.0 mi west of its junction with Wrights Lake Road (Forest Road 4) NNE of Kyburz 2043 Comment
  UCR176202  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2006-8-14 11222 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  UCR248411  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 22005 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.8 mile north of its junction with CA-88 and near Jim Quinn Spring 2117 Comment
  UCR191124  Aster oregonensis George K. Helmkamp, E. A. Helmkamp 2007-8-29 12831 Yuba Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 0.5 mile south of Camptonville 817 Comment
  SD224949  Astragalus aridus G. K. Helmkamp 1998-4-4 3107 San Bernardino Mojave Desert: S edge of Cadiz Dry Lake, 13.1 mi N of mile-marker 76 on CA hwy 62 (Twentynine Palms Hwy), E of Twentynine Palms. 182 Comment
  SBBG94891  Astragalus crotalariae G. K. Helmkamp 1975-2-17 s.n. Riverside St Hwy 111 at Salt Crk, NE side of Salton Sea Comment
  CLARK-A1045-700  Astragalus douglasii George K. Helmkamp 1977-7-5 San Bernardino San Bernardino Mountains north of State highway 38 at Fish Creek; ; Moonridge 7.5'Q 2133 Comment
  SEINET948240  Astragalus douglasii G. K. Helmkamp, E. A. Helmkamp 1999-1 5048 Nevada Northern Sierra Nevada Range: Prosser Creek at Hobart Mills, ca. 50-100 yards E of Hwy CA-89, & NE of Lake Tahoe (Hobart Mills 7.5' USGS Q) 1707 Comment
  CLARK-A1045-1079  Astragalus lemmonii George K. Helmkamp 1979-6-12 Mono Owens River near River, 4.5 miles south of Arcularius Ranch; ; Whitmore Hot Springs 7.5'Q 2133 Comment
  UCR101646  Astragalus lentiginosus var. borreganus George K. Helmkamp, E. A. Helmkamp 1998-2-26 2772 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
  SBBG103905  Astragalus lentiginosus var. variabilis G. K. Helmkamp 1993-4-24 San Bernardino between Kelbaker Rd and the Granite Mtns, 5.1 mi NE of US 40 1219 Comment
  UCR101039  Astragalus lentiginosus var. variabilis George K. Helmkamp, E. A. Helmkamp 1998-4-9 3314 San Bernardino Mojave Desert, Between hwy 58 & the Railroad at Edwards Siding (c. halfway between Mojave & Boron). 732 Comment
  CLARK-A1045-813  Astragalus nuttallianus var. imperfectus George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  UCR159318  Astragalus nuttallii var. nuttallii George K. Helmkamp, E. A. Helmkamp 2004-7-14 8768 Santa Barbara Southern Central Coast, Surf, NW of Lompoc 46 Comment
  CLARK-A1045-1386  Athyrium filix-femina George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada Porcupine Flats Campground; beside creek; ; Yosemite Falls 7.5'Q 2590 Comment
  UCD136269  Athyrium filix-femina G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12766 Amador Northern Sierra Nevada Mountains: along the south side of Bear River Reservoir just east of the spillway. 1777 Comment
  UCR106421  Athysanus pusillus George K. Helmkamp, A. C. Sanders 1997-3-15 1488 Riverside Skinner Lake, Grassland at base of Bachelor Mtn. and adjoining chapararal. 488 Comment
  UCR184928  Athysanus pusillus George K. Helmkamp, E. A. Helmkamp 2007-3-10 11602 El Dorado Northern Sierra Nevada Mountains Foothills, Rattlesnake Bar Rd, 3.0 miles southwest of Calif. Hwy 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
  UCR92484  Atrichoseris platyphylla George K. Helmkamp 1995-3-16 s.n. Riverside Sonoran (Colorado) Desert, Below Coxcomb Mtns., west of Rice Rd., 10.3 mi. NE of Desert Center 200 Comment
  UCR27486  Atriplex canescens George K. Helmkamp 1982-9-17 s.n. Kern Transverse Range; Mt. Pinos Region, along Cuddy Valley Road, 0.8 mi west of Lockwood Valley Rd Comment
  SD224920  Atriplex elegans var. fasciculata G. K. Helmkamp 1998-3-30 3000 San Bernardino Mojave Desert: Dale Dry Lake, E of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR133222  Atriplex lentiformis subsp. torreyi George K. Helmkamp 1993-10-5 39- 03 Inyo Owens Valley, Pleasant Valley, north of Bishop, at edge of Owens River 1284 Comment
  SD148188  Atriplex phyllostegia G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6547 Kern Enos Lane Road, 1.9 miles south of California 119. 60 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
  UCR118354  Atriplex triangularis George K. Helmkamp, E. A. Helmkamp 2000-9-1 5957 San Luis Obispo Los Osos, c. 0.5 miles NW of Hazard Cyn., between Howard St. and sand dunes 6 Comment
  SD148186  Atriplex watsonii G. K. Helmkamp, E. A. Helmkamp 2000-9-1 5949 San Luis Obispo Los Osos; 0.5 mile northwest of Hazard Canyon, between Howard St. and sand dunes. 6 Comment
  SD255606  Avena barbata George K. Helmkamp 2014-3-21 22623 Sutter Sacramento Valley: 2.8 miles WSW (257a^z) of Sutter, along CA-20 at the junction with Morehead Road. (Sutter Buttes 7.5'Q) 10 Comment
  UCR258180  Avena fatua George K. Helmkamp, Amy Barnes 2013-3-28 20245 Placer Eastern Sacramento Valley, NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 43 Comment
  UCR96383  Azolla filiculoides George K. Helmkamp 1996-9-29 1254 Mono Spring [Layton Springs] on the east side of Lake Crowley 3.5 miles SSE of Benton Crossing 2073 Comment
  UCD129426  Baccharis pilularis G. K. Helmkamp; E. A. Helmkamp 2006-10-8 11496 Calaveras Northern Sierra Nevada Mountains Foothills. Along Hwy CA-26, 0.8 miles east of CA-49 in the vicinity of Mokulumne Hill. 488 Comment
  UCR146965  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2004-10-8 8847 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCR182298  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2006-10-8 11496 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
  RSA567423  Baccharis sergiloides George K. Helmkamp 1993-9-22 34 -7 San Bernardino 6.7 mi. up Burns Canyon from jct of Pioneertown and Pipes Cyn Rds. 1529 Comment
  RSA489398  Baileya pauciradiata George K. Helmkamp 1988-2-28 s.n. Imperial just N of Signal Mts, S of Hwy deserticola. 30 Comment
  UCR122574  Baileya pleniradiata George K. Helmkamp, E. A. Helmkamp 2001-3-24 6315 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  UCR132752  Balsamorhiza sagittata George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 35.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  RSA0035849  Barbarea orthoceras George K. Helmkamp, Mary Alice Barnes 2013-4-18 20349 Placer Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 ) of Colfax 561 Comment
  UCR61732  Barbarea orthoceras George K. Helmkamp 1990-4-1 s.n. San Luis Obispo West Cuesta Ridge, c. 3 mi west of US Hwy 101 671 Comment
  UCR107368  Bellardia trixago George K. Helmkamp, E. A. Helmkamp 1998-5-16 3725 A Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR123950  Bellis perennis George K. Helmkamp, E. A. Helmkamp 2001-7-8 6993 Humboldt North Coast, CA Hwy 36, along the Van Duzen River, 19.6 mi east of CA Hwy 101, west of Bar W Road 137 Comment
  UCR161234  Bellis perennis George K. Helmkamp, E. A. Helmkamp 2004-12-6 8875 San Luis Obispo Central Coast, Arroyo Grande Community Center, Ash and Elm Streets 30 Comment
  SBBG129261  Blepharipappus scaber G. K. Helmkamp, A. Barnes 2014-5-8 22838 Amador Tonzi Rd, 0.4 mi E of its jct with CA-124, 4.5 air mi NE of Ione 188 Comment
  HSC79071  Boerhavia triquetra G. K. Helmkamp 1983-10-8 - 19 Riverside TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside pipeline road 762 Comment
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Feb 18 2013
  UCR249143  Boykinia occidentalis George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20763 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  UCR104965  Brandegea bigelovii George K. Helmkamp, E. A. Helmkamp 1998-2-18 2730 Riverside Sonoran (Colorado) Desert, Chuckwalla Valley; 0.3 mi south of Chuckwalla Rd. on Graham Pass Rd. 122 Comment
  UCR190198  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2007-9-19 12979 El Dorado Northern Sierra Nevada Mountains Foothills, along Greenstone Road just south of its junction with US-50 (east of Shingle Springs) 427 Comment
  UCR194718  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2007-10-13 13085 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR231879  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2010-10-16 17022 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
  UCR232657  Brassica geniculata George K. Helmkamp, E. A. Helmkamp 2011-10-8 18379 Glenn Northern Sacramento Valley, along CA-45, 1.2 miles north of Princeton; Sacramento River side of the levee between the highway and Packer Island 29 Comment
  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
  UCR207827  Brassica rapa George K. Helmkamp, E. A. Helmkamp 2009-3-26 14450 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  CLARK-A1045-1209  Brassica tournefortii George K. Helmkamp 1977-1-22 Imperial Yuha Desert Mount Signal [area], 2 miles south of State Highway 98, gravel pit; Mount Signal 7.5'Q Comment
  UCR89832  Brassica tournefortii George K. Helmkamp 1994-3-10 42 6 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
  SEINET2055878  Brickellia lemmonii G. K. Helmkamp, E. A. Helmkamp 2000-9-13 6037 Riverside Chiricahua Mins; Pinery Cyn. 3.0 mi SE of Hwy AZ 181 1737 Comment
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May 3 2014
  CLARK-A1045-526  Brickellia oblongifolia var. linifolia George K. Helmkamp 1979-6-5 #3 San Bernardino San Bernardino Mountains limestone slope at Spring; Big Bear City 7.5'Q Comment
  SEINET3440065 Image available Briza minor George K. Helmkamp, E. A. Helmkamp 2011-5-6 17187 Yuba East edge of Sacramento Valley: Camp Far West Road, 0.3 mi N of the junction with Hokan lane, vicinity of Camp Far West Reservoir 105 Comment
  UCR173281  Briza minor George K. Helmkamp, Elizabeth Helmkamp 2006-5-19 10480 El Dorado Northern Sierra Nevada Foothills, Lake Oaks mobile home park; corner of Pleasant Valley Road and Patterson Drive., Diamond Springs. 537 Comment
  UCR206105  Briza minor George K. Helmkamp, E. A. Helmkamp 2009-5-24 14765 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 1.3 miles east of the Cosumnes River and CA-49 381 Comment
  UCR257099  Brodiaea elegans subsp. elegans George K. Helmkamp, Mary Alice Barnes 2013-5-17 20606 Amador Northern Sierra Nevada Mountains Foothills, Stony Creek Road, 3.6 miles southwest of Jackson 293 Comment
  SEINET3271573 Image available Bromus George K. Helmkamp, E. A. Helmkamp 2009-7-22 15246 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
  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
  SEINET3271576 Image available Bromus carinatus George K. Helmkamp, E. A. Helmkamp 2009-7-2 15092 El Dorado Sierra Nevada Mountains; Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR173587  Bromus carinatus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10389 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR197312  Bromus carinatus George K. Helmkamp, E. A. Helmkamp 2008-7-11 13779 El Dorado Northern Sierra Nevada Mountains, north side of CA-88, 2.1 miles northeast of the junction with Mormon Emigrant Trail 2340 Comment
  CAS-BOT-BC444017  Bromus carinatus var. carinatus George K. Helmkamp; Elizabeth Helmkamp 2013-6-19 20888 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
  UCR257807  Bromus carinatus var. carinatus George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19427 Sierra Northern Sierra Nevada Mountains, along Hwy CA-89, c. 8 miles north of the Nevada County line 1823 Comment
  UCD58584  Bromus diandrus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10386 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 Comment
  UCR242798  Bromus diandrus George K. Helmkamp, E. A. Helmkamp 2010-4-14 15872 Solano Northern San Joaquin Valley, Pitt School Road, 3.8 miles south of its junction with I-80 and south of Dixon 21 Comment
  UCR253506  Bromus diandrus George K. Helmkamp 2014-3-11 22542 Nevada Sierra Nevada Mountains Foothills, along Wolf Road, 0.1 mile north of its junction with Matthew Lane, NW of Higgins Corner 413 Comment
  RSA0053700  Bromus hordeaceus G. K. Helmkamp, E. A. Helmkamp 2013-5-24 20694 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
  SEINET3271605 Image available Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-3-14 11635 Sacramento Sacramento Valley near the edge of Sierra Nevada Mountains foothills; Latrobe Rd about 5.7 miles west of Latrobe and 1.5 miles west of the El Dorado Co. line 110 Comment
  SEINET8465031 Image available Bromus hordeaceus George K. Helmkamp, E. A. Helmkamp 2007-4-20 11777 El Dorado Foothills, Northern Sierra Nevada Mountains: along Green Valley Road at junction of Jet Quartz Creek Rd., between Four Corners and Gold Hill 410 Comment
  UCR258237  Bromus hordeaceus George K. Helmkamp, Amy Barnes 2013-3-28 20236 Placer Eastern Sacramento Valley, NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 43 Comment
  UCR102929  Bromus rubens George K. Helmkamp 1998-2-5 2646 Riverside Sonoran (Colorado) Desert/San Jacinto Mtns., Palm Springs, 1.1 mi. west of Calif. Hwy 111 on Tramway Rd. 335 Comment
  UCD58958  Bromus rubens subsp. rubens G. K. Helmkamp 2004-2-29 8317 San Luis Obispo San Luis Obispo Co.: Central Coast: Nipomo Mesa, Nipomo, Orchard Ave. 0.1 mi. NW of Division St. 115 Comment
  UCR235497  Bromus sterilis George K. Helmkamp, E. A. Helmkamp 2012-5-15 18995 Calaveras Northern Sierra Nevada Mountains Foothills, at a crossing of Murray Creek along Murray Creek Road; 1.8 miles east of Pope Road in San Andreas 351 Comment
  UCR114349  Bromus suksdorfii George K. Helmkamp, E. A. Helmkamp 1997-9-8 2267 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCD60218  Bromus tectorum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-24 10534 El Dorado Northern Sierra Nevada Mountains: Along Ice House Canyon Road, 10.6 mi. S of Wentworth Springs Road (just S of the Jones fork of Silver Creek and SE of Union Valley Reservoir). 1505 Comment
  UCR124000  Caesalpinia virgata George K. Helmkamp, E. A. Helmkamp 2001-4-14 6466 Riverside Coachella Valley, Indio Hills, 1.4 mi north of Ramon Rd on Avita Rd (Avita is 2.8 mi east of I-10) 46 Comment
  CLARK-A1045-1325  Cakile maritima George K. Helmkamp 1977-10-15 San Diego Imperial Beach in Border Field State Park; isandy area just off beach, ; Imperial Beach 7.5'Q Comment
  UCR158752  Cakile maritima George K. Helmkamp, E. A. Helmkamp 2004-6-24 8700 Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 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
  UCR250090  Calandrinia ciliata George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20206 Calaveras Eastern San Joaquin Valley, Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  UCR272771  Calandrinia ciliata George K. Helmkamp 2014-3-14 22566 Amador West end Sacramento Valley, Willow Creek Road, 1.1 miles south of Hwy E-16 253 Comment
  CLARK-A1045-1328  Calandrinia ciliata var. menziesii George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay coastal strand; Morro Bay North 7.5' Q Comment
  UCR188499  Calocedrus decurrens George K. Helmkamp, E. A. Helmkamp 2007-9-26 13018 El Dorado Northern Sierra Nevada Mountains Foothills, Bonetti Road, 1.1 miles south of its junction with Mormon Emigrant Trail, just east of Jenkinson Lake 1189 Comment
  SEINET11261459  Calochortus albus George Helmkamp, E. A. Helmkamp 2012-5-5 18912 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
  UCR187516  Calochortus albus George K. Helmkamp, E. A. Helmkamp 2007-4-20 11757 El Dorado Foothills, Northern Sierra Nevada Mountains, junction of French Creek Road and Lost Creek road just north of Frenchtown 366 Comment
  UCR234581  Calochortus albus George K. Helmkamp, E. A. Helmkamp 2011-6-2 17437 Nevada Northern Sierra Nevada Mountains Foothills, Lake Wildwood, along Pleasant Valley Road, 1.2 miles north of its junction with CA-20 433 Comment
  UCR235615  Calochortus albus George K. Helmkamp, E. A. Helmkamp 2012-5-5 18912 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
  UCR251246  Calochortus albus George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20668 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
  UCR197594  Calochortus coeruleus George K. Helmkamp, E. A. Helmkamp 2008-6-9 13648 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
  UCR176315  Calochortus minimus George K. Helmkamp, E. A. Helmkamp 2006-7-10 10892 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
  UCR258550  Calochortus minimus George K. Helmkamp, Mary Alice Barnes 2013-4-30 20420 El Dorado Northern Sierra Nevada Mountains, Capps Crossing Road, 0.1 mile south of its junction with Mormon Emigrant Trail 1261 Comment
  UCR173527  Calochortus monophyllus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10409 Nevada Northern Sierra Nevada Foothills, San Juan Ridge area at North Columbia, c. 9.3 mi. east of Calif. Hwy 49 884 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
  UCR242763  Calochortus monophyllus George K. Helmkamp, E. A. Helmkamp 2011-5-24 17368 El Dorado Northern Sierra Nevada Mountains Foothills, Mesquite Road, 7.5 miles south of its junction with Wentworth Springs Road 1073 Comment
  UCR217842  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 2010-5-31 16181 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 3.3 miles east of the village of Sutter Creek 413 Comment
  SBBG126071  Calycadenia fremontii G. K. Helmkamp with E. A. Helmkamp 2009-6-13 15000 Shasta Wilson Hill Rd, 2.4 mi S of its jct with CA-44 in Shingletown 857 Comment
  UCR29780  Calycoseris wrightii George K. Helmkamp 1983-3-24 383- 14 Riverside Sonoran (Colorado) Desert, north base of the Little Chuckwalla Mountains, 1.5 miles east of Graham Pass Road 336 Comment
  CLARK-A1045-237  Calyptridium monandrum George K. Helmkamp 1978-4-1 Riverside Whitewater junction of Interstate highway 10 and Verbenia Avenue; Whitewater 7.5'Q Comment
  UCR218101  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2010-7-9 16496 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  UCR229411  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2011-7-30 17950 El Dorado Northern Sierra Nevada Mountains, Omo Ranch Road, 7.4 miles southeast of Omo Ranch, 1.9 mi. NW (304 deg. ) airline of Hwy 88 junction 1372 Comment
  UCR250061  Calyptridium monospermum George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20867 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  SD148182  Calystegia macrostegia subsp. intermedia G. K. Helmkamp, E. A. Helmkamp 2001-4-29 6598 San Luis Obispo Profumo Canyon Road, 2.8 miles west of Los Osos Valley Road. 91 Comment
  UCR191150  Calystegia malacophylla subsp. malacophylla George K. Helmkamp, E. A. Helmkamp 2007-6-8 12305 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 5.4 miles south of Mormon Emigrant Trail, generally east of Jenkinson Lake 1372 Comment
  UCR157808  Calystegia malacophylla subsp. pedicellata George K. Helmkamp, E. A. Helmkamp 1998-6-29 4199 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  CLARK-A1045-674  Camissonia brevipes George K. Helmkamp 1977-4-24 Inyo Panamint Mountains Wildrose Campground; dry slope; ; Emigrant Pass 7.5' Q 1249 Comment
  SD148108  Camissonia campestris subsp. campestris G. K. Helmkamp, E. A. Helmkamp 2001-5-2 6622 San Luis Obispo La Panza Range: CA-58, 11.2 miles east of Santa Margarita. 487 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
  UCR100942  Camissonia campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 1998-4-8 3196 Kern SW of Maricopa 1.7 mi NW of Calif. hwy 33 on Elkhorn Grade Rd. 396 Comment
  UCR101025  Camissonia campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 1998-4-8 3231 San Luis Obispo Soda Lake Rd, 6.6 mi. NW of jct with Calif. hwy 33 (roughly west of Maricopa). 671 Comment
  CLARK-A1045-1281  Camissonia cardiophylla George K. Helmkamp 1978-3-17 San Diego Anza-Borrego Desert State Park Canon sin Nombre [No-name Canyon]; sandy wash; Sweeney Pass 7.5'Q Comment
  CLARK-A1045-803  Camissonia chamaenerioides George K. Helmkamp 1978-5-6 #1 San Bernardino Mesquite Mountains 1.5 miles east of Pass, steep limestone slope; Clark Mt. 15'Q Comment
  RSA697219  Camissonia cheiranthifolia subsp. cheiranthifolia George K. Helmkamp, E. A. Helmkamp 2001-7-8 7021 Humboldt North coast: Samoa Peninsula, 2.6 miles S of CA-255 bridge across Humboldt Bay. 15 Comment
  UCR50961  Camissonia claviformis George K. Helmkamp 1988-2-28 s.n. Imperial Sonoran (Colorado) Desert, at end of a dirt road c. 2 miles WSW of Crucifixion Thorn Natural Area, SE of Ocotillo and SW of Hwy 98 153 Comment
  UCR100860  Camissonia claviformis subsp. yumae George K. Helmkamp, E. A. Helmkamp 1998-3-18 2868 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
  VVC932  Camissonia claviformis var. claviformis G. K. Helmkamp 1998-4-9 3312 Kern Mojave Desert, Between hwy 58 & the Railroad at Edwards Siding (ca. halfway between Mojave & Boron). 732 Comment
  UCR98135  Camissonia confusa George K. Helmkamp 1986-4-7 756 San Bernardino Little San Bernardino Mountains, Vicinity of Big Morongo Nature Conservancy Preserve, south of town of Morongo Valley; just east of and parallel to Hwy 62, above Indian Ave. 579 Comment
  UCR110976  Camissonia intermedia George K. Helmkamp 1998-6-27 4086 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
  UCR161777  Camissonia ovata George K. Helmkamp, E. A. Helmkamp 2005-5-17 9481 San Luis Obispo Central Coast, 1.5 mi WNW of Piedras Blancas at Mile 64 of Calif. Highway 1 9 Comment
  CLARK-A1045-210  Camissonia pallida George K. Helmkamp 1979-4-18 Riverside Indio Hills along Dillon Road; Lost Horse Mtn. 15'Q Comment
  SEINET3093300 Image available Camissonia pallida G. Helmkamp, A. C. Sanders, P. MacKay, T. Thomas 1997-2-8 19674 Riverside Colorado Desert: Palm Springs, Indian Ave at Las Vegas Rd, below mouth of Chino Canyon. Palm Springs 7.5' Quad. 188 Comment
  UCR90226  Camissonia refracta 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
  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
  SD167182  Cardamine californica G. K. Helmkamp, E. A. Helmkamp 2005-3-5 9008 San Luis Obispo Santa Lucia Wilderness, north of Lake Lopez, Upper Lopez Canyon Road, 7.2 miles north of junction with Lopez Road and at Water End Road. 174 Comment
  SEINET3238870 Image available 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
  UCD114516  Cardamine hirsuta G. K. Helmkamp; E. A. Helmkamp 2007-3-5 11597 El Dorado northern Sierra Nevada Mountains; junction of Rock Creek Road and Highway CA-49, north of Chili Bar. 457 Comment
  UCR198451  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2008-3-12 13167 Amador Sierra Nevada Mountains Foothills, Middle Bar Road, 3.7 miles south of its junction with CA-49 just south of Jackson 345 Comment
  UCR161214  Cardamine oligosperma George K. Helmkamp, E. A. Helmkamp 2004-12-6 8871 San Luis Obispo Central Coast, Arroyo Grande Community Center, Ash and Elm Streets 30 Comment
  UCR121776  Cardionema ramosissimum George K. Helmkamp 2002-4-20 7467 San Luis Obispo Central Coast, Los Osos, 0.2 mile northwest of Monarch Lane 9 Comment
  RSA0116846  Carex athrostachya George K. Helmkamp, E. A. Helmkamp 2009-8-4 15387 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. 2637 Comment
  UCD140154  Carex athrostachya G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12525 Amador Northern Sierra Nevada Mountains: along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake. 2316 Comment
  UCR173766  Carex deweyana subsp. leptopoda George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10322 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  RSA755556  Carex feta George K. Helmkamp, E. A. Helmkamp 2009-8-19 15490 El Dorado Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  UCR122343  Carex fracta George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5897 Mono Sierra Nevada Mountains., West side of Lake Mary, southwest of Mammoth Lakes 2652 Comment
  UCR57515  Carex fracta 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
  UCR91713  Carex fracta George K. Helmkamp 1996-6-11 1130 San Bernardino San Bernardino Mtns., 1.2 miles SW of Tulip Lane, city of Big Bear Lake 2143 Comment
  HSC83374  Carex lanuginosa G. K. Helmkamp 1985-8-20 88522 Mono Along the Owens River, at Big Springs Campground, 7 mi. NE of Mammoth Lakes, above Arcularius Ranch 2195 Comment
  UCD140496  Carex lenticularis G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10921 El Dorado Northern Sierra Nevada Mtns: 0.3 mile west of the junction of Wright's Lake Road and the road from Ice House Reservoir. Silver Creek. 2012 Comment
  RSA351399  Carex lenticularis var. lipocarpa George K. Helmkamp 1985-8-23 885 -39 Mono Mammoth Lakes, edge of Lake Mamie. 2591 Comment
  UCR257671  Carex multicostata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19568 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 1.4 miles west of its junction with CA-88 2287 Comment
  UCR87705  Carex specifica 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
  RSA351398  Carex straminiformis George K. Helmkamp 1985-8-20 885 -14 Mono Along the Owens River at Big Springs Campground, 7 airline miles NE of Mammoth Lakes, above Arcularius Ranch. 2195 Comment
  UCR15010  Carex straminiformis George K. Helmkamp 1976-6-22 s.n. Mono Sierra Nevada Mtns, Mammoth Lakes Village, roadside 2393 Comment
  UCR174296  Carex subfusca George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10721 El Dorado Northern Sierra Nevada Mountains, 0.8 mile east of Ice House Road on the road to Wright's Lake 1672 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
  UCR245598  Carex tompkinsii George K. Helmkamp, E. A. Helmkamp 2012-5-31 19108 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCR252955  Carex vesicaria var. vesicaria George K. Helmkamp, Belinda Pesheck 2013-7-14 21077 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  UCR103961  Carthamus baeticus George K. Helmkamp 1997-6-21 2062 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 Comment
  RSA0047742  Castilleja affinis subsp. affinis George K. Helmkamp, Elizabeth A. Helmkamp 2013-5-24 20699 Calaveras Along Hwy CA-26, 1.4 miles northeast of its junction with Jesus Maria Road 457 Comment
  UCR130987  Castilleja angustifolia George K. Helmkamp, E. A. Helmkamp 1998-5-3 3523 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  UCR90234  Castilleja angustifolia George K. Helmkamp 1995-3-26 s.n. Inyo Northern Mojave Desert, Death Valley National Monument [now National Park], [Grapevine Mountains], Titus Canyon Comment
  UCR219038  Castilleja applegatei George K. Helmkamp, E. A. Helmkamp 2010-7-13 16509 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 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
  UCR103990  Castilleja exserta George K. Helmkamp 1998-4-3 3093 Riverside Coachella Valley, Mission Creek, the Wildlands Conservancy Preserve, 1.1 mi. NW of the ranch house beside a gauging staion along the creek 747 Comment
  RSA794941  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2011-4-1 17125 Colusa Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UCR118273  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2000-4-24 5525 Monterey South Coast Range, west end Salinas Valley; Nacimiento-Fergusson Rd., 1.5 miles west of Mission Rd. just south of Mission San Antonio 320 Comment
  UCR163775  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2005-3-30 9276 San Luis Obispo Outer South Coast Ranges, La Panza Range along Calif. Highway 58 in Calf Canyon, 3.0 mi NE of Santa Margarita 335 Comment
  UCR104782  Castilleja foliolosa George K. Helmkamp 1997-3-8 1460 San Luis Obispo Central Coast 7.5' Q., SE of Los Osos. Swift Ranch, starting c. 2 mi. south of Los Osos Valley Rd on Clark Valley Rd. 107 Comment
  UCR163648  Castilleja foliolosa George K. Helmkamp, E. A. Helmkamp 2005-3-30 9242 San Luis Obispo Outer South Coast Ranges, Pozo Road, 5.5 mi east of [Santa Margarita Lake Road]; W end of Garcia Mountains 503 Comment
  UCR158440  Castilleja latifolia George K. Helmkamp 2004-6-15 8641 San Luis Obispo Central Coast, Between Oso Flaco Lake and the Pacific Ocean, c. 0.3 mi WNW of the lake 9 Comment
  UCR115822  Castilleja linariifolia George K. Helmkamp, E. A. Helmkamp 2000-7-18 5862 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
  UCR233411  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2011-9-13 18243 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 21.4 rd. miles southeast of Jenkinson's Lake, between Silver Fork Road and Hwy 88, 1.1 mi. NW (331 deg. ) of Alder Hill 2270 Comment
  UCR13914  Castilleja pilosa George K. Helmkamp 1973-6-13 s.n. Inyo Owens Valley, Owens River near Pleasant Valley 1372 Comment
  UCR122629  Castilleja subinclusa subsp. franciscana George K. Helmkamp, E. A. Helmkamp 2001-6-2 6789 San Mateo Central Coast, Purissima Creek Rd., 0.9 mi from Calif. Hwy 1(junction about 4 mi south of Half Moon Bay) 91 Comment
  UCR178642  Castilleja tenuis George K. Helmkamp, E. A. Helmkamp 2006-9-7 11356 El Dorado Northern Sierra Nevada Mountains, Ice House Road. Robbs Valley near Robbs Hut junction 1720 Comment
  RSA0045231  Catalpa speciosa George K. Helmkamp, E. A. Helmkamp 2006-9-29 11456 El Dorado Pleasant Valley Rd 0.1 mile east of Patterson Dr. 534 Comment
  UCR208277  Caucalis microcarpa George K. Helmkamp, E. A. Helmkamp 2009-5-7 14634 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 13.6 miles east of its junction with Forest Hill Road in Foresthill 771 Comment
  UCR121856  Caulanthus cooperi George K. Helmkamp, E. A. Helmkamp 2001-3-24 6309 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  SBBG128618  Ceanothus cordulatus G. K. Helmkamp, E. A. Helmkamp 2012-6-19 19222 Placer Devil's Thumb Rd (Deadwood Rd), 1.2 mi S of its jct with Foresthill Rd 1648 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
  UCR237075  Ceanothus cordulatus George K. Helmkamp, E. A. Helmkamp 2012-5-22 19047 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.6 miles southeast of US-50 in Kyburz 1495 Comment
  SD241942  Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2010-4-17 15900 Placer Siera Nevada Mountains Foothills: Rattleshake Bar Road, 8.3 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q) 308 Comment
  SEINET4178631 Image available Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2010-8-3 16682 Calaveras Northern Sierra Nevada Mountains: along CA-4 at the Arnold Byway, about 0.3 mile northeast of Arnold. 1244 Comment
  UCR140067  Ceanothus integerrimus George K. Helmkamp 2004-4-14 8443 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR224241  Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2010-4-24 15938 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
  UCR246580  Ceanothus integerrimus George K. Helmkamp, E. A. Helmkamp 2012-6-6 19133 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
  UCR122497  Ceanothus leucodermis George K. Helmkamp, E. A. Helmkamp 2001-5-2 6606 San Luis Obispo South Coast Range, La Panza Range, Calf Canyon, CA Hwy 58, 4.5 mi east of Santa Margarita 335 Comment
  UCR114623  Ceanothus perplexans George K. Helmkamp, E. A. Helmkamp 1999-4-15 4649 San Diego Peninsular Ranges, c. 5 mi NE of Alpine. Old Viejas Grade at the E side of Viejas Mtn., 0.6 mi east of the Viejas Indian Reservation 854 Comment
  UCR130673  Ceanothus perplexans George K. Helmkamp, E. A. Helmkamp 1999-4-15 4636 San Diego Dodge Valley, 3.5 mi SE of Oak Grove at junction of Hwy-79 & Chihuahua Valley Rd. 960 Comment
  UCR191062  Ceanothus prostratus George K. Helmkamp, E. A. Helmkamp 2007-5-23 12054 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 11.1 miles northeast of Foresthill 1463 Comment
  UCR253142  Ceanothus prostratus George K. Helmkamp, E. A. Helmkamp 2013-11-27 22494 El Dorado Sierra Nevada Mountains Foothills, Capp's Crossing Road, 0.4 mile southeast of its junction with Mormon Emigrant Trail 1204 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
  UCR235572  Ceanothus tomentosus George K. Helmkamp, E. A. Helmkamp 2012-5-3 18889 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 5.3 miles NW of Pollock Pines 918 Comment
  CLARK-A1045-1313  Ceanothus tomentosus subsp. olivaceus George K. Helmkamp 1977-9-24 San Diego .5 mile west of Camino Ruiz and .25 mile south of Mira Mesa Boulevard; Adenostoma fasciculata; Del Mar 7.5'Q Comment
  UCR67463  Centaurea cyanus George K. Helmkamp 1990-9-23 I- 12 Modoc Warner Mtns, Goose Lake, within 0.1 mi of the Oregon border 1476 Comment
  UCR197034  Centaurea diffusa George K. Helmkamp, E. A. Helmkamp 2008-7-22 13900 Alpine Eastern Sierra Nevada Mountains, Carson River Road at its east junction with CA-88 and Diamond Valley Road 1677 Comment
  RSA0045222  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2006-10-6 11461 Amador Along Calif. Hwy 49 near Enterprise, 1.8 miles south of El Dorado Co. line. 274 Comment
  SEINET2441346  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-8-6 15397 Amador Sierra Nevada Mountains Foothills: along Hwy CA-88, 3.1 miles northeast of CA-49 in Jackson (Mokelumne Hill 7.5' Q.).; 0 424 Comment
  SEINET3245715  Centaurea solstitialis G. K. Helmkamp, E. A. Helmkamp 2007-1 13029 Sutter Central Valley; Sacramento Valley; American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line 3 Comment
  UCD130097  Centaurea solstitialis G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13073 Butte Northern Sacramento Valley: Biggs East Hwy, 1.6 miles east of CA-99 at Biggs. 32 Comment
  UCR146656  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2004-10-1 8833 San Luis Obispo Central Coast; Outer South Coast Range, 3.4 miles east of Lopez Lake along Hi Mountain Road and beside Arroyo Grande Creek 171 Comment
  UCR194725  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2007-10-13 13080 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR123173  Centaurium davyi George K. Helmkamp, E. A. Helmkamp 2002-4-16 7415 San Luis Obispo Central Coast, Park Ridge 0.5 mi east of Morro Bay near Turri Road 76 Comment
  UCR231005  Centaurium muehlenbergii George K. Helmkamp, E. A. Helmkamp 2011-6-22 17615 Amador Northern Sierra Nevada Mountains Foothills, Sutter-Ione Road, 2.7 miles west of its junction with CA-49, 2.9 mi. SW (221 deg. ) of Amador City 308 Comment
  SEINET4560908  Centaurium venustum George K. Helmkamp, E. A. Helmkamp 2011-1 17703 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 6.7 miles east of its junction with CA-26 in West Point. 1192 Comment
  SD234820  Centromadia fitchii G. K. Helmkamp, E. A. Helmkamp 2006-10-6 11475 Amador Northern Sierra Nevada Mountains: along Hwy CA-49, 1.1 miles south of Plymouth (Amador City 7.5'Q) 313 Comment
  SD237327  Centromadia fitchii G. K. Helmkamp, E. A. Helmkamp 2009-8-28 15537 Sacramento Northern Sacramento Valley: along Latrobe Road, 1.1 miles west of the El Dorado County line, 3 mi. NE (36a^z) of Rancho Murieta. 139 Comment
  SD234350  Cerastium fontanum subsp. vulgare G. K. Helmkamp 2004-5-9 8573 San Luis Obispo Central Coast: Mesa Dunes Mobile Home Park along Mesa View Dr. (Hwy CA-1), 0.2 mi S of the jct of Halcyon Rd (Oceano 7.5'Q) 60 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
  UCR206305  Cercis occidentalis George K. Helmkamp, E. A. Helmkamp 2009-6-13 15011 Shasta Southern Cascade Range Foothills, Wilson Hill Road, 6.6 miles south of its junction with CA-44 in Shingletown and about 1 mile north of Manton 640 Comment
  UCR122442  Cercocarpus betuloides var. betuloides George K. Helmkamp, E. A. Helmkamp 2002-4-23 7597 Madera Western Sierra Nevada foothills, Bass Lake Road, 2.2 miles southeast of the junction with CA Hwy 41 976 Comment
  UCR103303  Chaenactis carphoclinia var. carphoclinia George K. Helmkamp 1998-3-30 2996 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  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-A1045-424  Chaenactis santolinoides George K. Helmkamp 1978-6-6 San Bernardino San Bernardino Mountains north edge of Lake, at junction of State Highway 18 and Big Bear Lake dam; yellow pine forest; Fawnskin 7.5'Q Comment
  CLARK-A1045-645  Chaenactis stevioides George K. Helmkamp 1977-5-29 San Bernardino Cima Dome Stuckey's [Cima Road at Interstate Highway 15]; Mescal Range 15'Q Comment
  UCR250190  Chamaebatia foliolosa George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20872 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  SD237628  Chamaesaracha nana G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15072 El Dorado Sierra Nevada Mountains: Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 miles NE (74a^z) of Pollock Pines (Riverton 7.5'Q) 1641 Comment
  UCR173805  Chamaesaracha nana George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10658 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 6.1 miles north of Hwy US-50 1653 Comment
  UCR215925  Chamaesaracha nana George K. Helmkamp, E. A. Helmkamp 2009-6-29 15072 El Dorado Sierra Nevada Mountains, Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74 deg. ) of Pollock Pines 1642 Comment
  RSA615427  Chamaesyce micromera George K. Helmkamp 1997-9-30 2490 Inyo East side of White Mountains. 1707 Comment
  RSA614498  Chamaesyce polycarpa var. polycarpa George K. Helmkamp, E. A. Helmkamp 1998-2-5 2664 Riverside Indio Hills, 3 mi. E of Thousand Palms & 1.1 mi. N on Amity Rd. 101 Comment
  UCR232605  Chenopodium George K. Helmkamp, E. A. Helmkamp 2011-10-13 18424 El Dorado Northern Sierra Nevada Mountains, Pony Express Trail, 0.9 mile east of Sly Park Road in Pollock Pines 1220 Comment
  HSC80087  Chenopodium album G. K. Helmkamp 1985-7-2 603 San Bernardino The Nature Preserve of the Big Morongo Preserve, S of Morongo Valley, at the entrance to the Preserve. 762 Comment
  UCR147225  Chenopodium album George K. Helmkamp, E. A. Helmkamp 2004-8-14 8783 San Luis Obispo Central Coast, junction of Thompson Rd. and Mehlschau Rd., NE of Nipomo 107 Comment
  IRVC29194  Chenopodium album G. K. Helmkamp, E. A. Helmkamp 2004-8-14 8783 San Luis Obispo junction of Thompson Rd. and Mehlschau Rd., NE of Nipomo Central Coast 107 Comment
  SD232662  Chenopodium berlandieri George Helmkamp 1996-9-26 1227 Mono City of Mammoth Lakes. Solitary plant in disturbed roadside soil at the south end of the city. 2469 Comment
  UCR189211  Chenopodium berlandieri George K. Helmkamp, E. A. Helmkamp 2007-9-11 12931 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50, 0.4 mile southwest of Phillips 1829 Comment
  UCR171243  Chenopodium botrys George K. Helmkamp, E. A. Helmkamp 2005-7-11 9702 El Dorado Northern Sierra Nevada Foothills, Pollock Pines area just south of US Highway 50 along County Road #5 1159 Comment
  UCR209757  Chenopodium botrys George K. Helmkamp, E. A. Helmkamp 2009-8-14 15472 El Dorado Sierra Nevada Mountains Foothills, junction of Sand Ridge Road and Cutaway Lane, 2.0 miles west of Bucks Bar Road 642 Comment
  UCR118352  Chenopodium missouriense George K. Helmkamp, E. A. Helmkamp 2000-9-1 5960 San Luis Obispo Los Osos, Martingale at Buckskin 30 Comment
  UCR103611  Chenopodium murale George K. Helmkamp, E. Helmkamp 1998-2-10 2688 Imperial Sonoran (Colorado) Desert, SE Salton Sea, vicinity of Wister, drainage ditch at the jct of Pound & Davis Streets. -66 Comment
  UCR115811  Chenopodium murale George K. Helmkamp, E. A. Helmkamp 2000-6-15 5690 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  SD237255  Chlorogalum pomeridianum G. K. Helmkamp, Amy Barnes 2009-7-12 15172 Placer Sierra Nevada Mountains Foothills: along Foresthill Road at the northeast end of the city of Foresthill. 985 Comment
  SEINET3815544 Image available Chlorogalum pomeridianum var. pomeridianum George K. Helmkamp, E. A. Helmkamp 2011-7-30 17946 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road, 7.4 miles SE of Omo Ranch, 1.9 mi NW airline of Hwy 88 junction 1372 Comment
  UCR259873  Chondrilla juncea George K. Helmkamp, Elizabeth Helmkamp 2013-10-18 22447 Amador Sierra Nevada Mountains Foothills, along Shenandoah Road, 0.2 mile east of CA-49 in Plymouth 364 Comment
  UCR103557  Chorizanthe brevicornu var. brevicornu George K. Helmkamp, E. A. Helmkamp 1998-1-17 2551 Riverside Sonoran (Colorado) Desert, Mecca Hills, Box Canyon Road ENE of Mecca and on the north side of the Coachella Canal .3 Comment
  UCR131904  Chrysanthemum coronarium George K. Helmkamp 2003-10-8 8195 San Luis Obispo Central Coast, base of Nipomo Mesa 0.25 mi SW of Halcyon Rd along an unnamed road near the railroad crossing 15 Comment
  UCR14386  Chrysanthemum parthenium George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Angelus Oaks, Robin Oak Dr. 1734 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
  UCR67461  Chrysothamnus nauseosus George K. Helmkamp 1990-9-23 D- 10 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  SEINET3282746 Image available Chrysothamnus viscidiflorus subsp. viscidiflorus George K. Helmkamp, E. A. Helmkamp 2008-9-22 14160 Alpine Northern Sierra Nevada Mountains; along CA-89. 0.1 mile north of Markleeville. 1686 Comment
  UCD103854  Chylismia claviformis G. K. Helmkamp; E. A. Helmkamp 1998-2-18 2710 Riverside Colorado Desert. Midland Road, 3.8 miles SE of Midland, Little Maria Mountains. Comment
  SD234291  Cirsium occidentale var. californicum G. K. Helmkamp, E. A. Helmkamp 2007-5-30 12200 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 17 miles east of its junction with Forest Hill Road in Foresthill, NW of Ditch Camp. 963 Comment
  UCR233198  Cirsium occidentale var. candidissimum George K. Helmkamp, E. A. Helmkamp 2011-7-17 17761 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg. ) of Peardale 686 Comment
  UCR248671  Cirsium scariosum George K. Helmkamp, Belinda Pesheck 2013-7-14 21039 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
  UCR59976  Cirsium vulgare George K. Helmkamp 1988-9-8 s.n. Mono Sierra Nevada Mtns., SW side of Mono Lake, between the lake and US Hwy 395 1951 Comment
  SEINET7249122  Cirsium vulgare George K. Helmkamp, Amy Barnes 2013-1 Calaveras Comment
  RSA0045135  Cistanthe monosperma George K. Helmkamp, E. A. Helmkamp 2012-7-6 19346 El Dorado Ice House Road, 0.4 mile north of Ice House village, 10.9 miles north of the junction with US-50. 1707 Comment
  RSA747128  Clarkia affinis George K. Helmkamp, E. A. Helmkamp 2007-5-1 11918 El Dorado along Hwy CA-49, 6.1 miles northwest of Placerville 454 Comment
  UCR107328  Clarkia affinis George K. Helmkamp, E. A. Helmkamp 1998-5-14 3659 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  UCD104333  Clarkia biloba subsp. biloba G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-4 10621 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
  UCR242573  Clarkia biloba subsp. biloba George K. Helmkamp, E. A. Helmkamp 2011-6-17 17598 Amador Northern Sierra Nevada Mountains Foothills, along CA-26, 0.1 mile west of the Calaveras Co. line at the bridge over the North Fork Mokelumne River, 1.6 mi. SE (115 deg. ) of Pioneer 652 Comment
  UCR256507  Clarkia biloba subsp. biloba George K. Helmkamp, Amy Barnes 2014-5-8 22855 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 0.2 mile east of old CA-49 in town of Sutter Creek 375 Comment
  UCR88713  Clarkia biloba subsp. biloba George K. Helmkamp, E. A. Helmkamp 1995-6-21 95-5- 05 Mariposa Sierra Nevada Mtns. Foothills, roadside cut along CA Hwy 49 at Hell Hollow, 1.5 mi south of the Merced River crossing 579 Comment
  RSA785404  Clarkia biloba subsp. brandegeeae George K. Helmkamp, E. A. Helmkamp 2010-6-23 16334 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
  SD239822  Clarkia biloba subsp. brandegeeae George K. Helmkamp, E. A. Helmkamp 2011-7-17 17757 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek. 686 Comment
  UCR218238  Clarkia biloba subsp. brandegeeae George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16441 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.3 miles SE of its junction with Canyon Way in Colfax 418 Comment
  RSA758526  Clarkia concinna subsp. concinna George K. Helmkamp, E. A. Helmkamp 2009-5-20 14728 Yolo west side of Cache Creek along CA-16, 5.5 miles southeast of the Colusa County line 177 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
  RSA0047746  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, Elizabeth A. Helmkamp 2013-5-24 20689 Calaveras Whiskey Slide Road, just east of West Murray Creek Road, c. 4.7 miles SE of Jesus Maria Road 677 Comment
  UCR108903  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 1998-6-30 4205 San Luis Obispo South Coast Range, Alamo Creek Rd, 0.9 mile north of Calif. Hwy 166, near Twitchell Reservoir 320 Comment
  UCR159850  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2005-6-12 9643 San Luis Obispo South Central Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 6.7 miles east of Santa Margarita 485 Comment
  UCR233671  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 1794 Comment
  RSA0093829  Clarkia stellata George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20795 Sierra Northern Sierra Nevada Mountains Foothills. Along CA-49, 1.9 miles NE of the Yuba County line, NE of Camptonville. 796 Comment
  UCR130241  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2001-4-27 6524 Kern Tehachapi Mtns., Western Foothills, Calif. Hwy 223 (Bear Mtn. Blvd.), 7.2 mi east of Arvin 366 Comment
  UCR160968  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2005-6-12 9658 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
  UCR206290  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 2009-5-20 14738 Colusa Central Inner Coast Ranges, along CA-16 near Bear Creek, 1.6 miles south of the junction with CA-20 320 Comment
  UCR222364  Clarkia virgata George K. Helmkamp, Mary Alice Barnes, Mary Jane Ganive 2010-6-13 16277 El Dorado Sierra Nevada Mountains Foothills, along Forebay Road, 2.1 miles northwest of the Forebay Bridge over South Fork American River 828 Comment
  SD236340  Clarkia williamsonii G. K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10793 Calaveras Northern Sierra Nevada foothills: along Hwy CA-26, 0.6 mile past Sandy Gulch. 793 Comment
  SD239826  Clarkia williamsonii George K. Helmkamp, E. A. Helmkamp 2011-7-12 17697 Amador Northern Sierra Nevada Mountains Foothills: along CA-88, 1.4 miles southwest of Ridge Road, 1.3 miles NW (334a^z) of Clinton (Pine Grove 7.5'Q) 622 Comment
  CAS-BOT-BC439445  Claytonia parviflora subsp. parviflora G. K. Helmkamp; E. A. Helmkamp 2008-4-30 13347 El Dorado Sierra Nevada Mountains Foothills: junction of Meadow Brook and Bear Creek Roads at Traverse Creek, south of Georgetown. 674 Comment
  SEINET1004399  Claytonia parviflora subsp. parviflora George K. Helmkamp 2004-1 8228 San Luis Obispo Central Coast: Nipomo Mesa, Pomeroy Rd, 1.1 mi N of Willow Rd. 130 Comment
  UCR170973  Claytonia parviflora subsp. parviflora George K. Helmkamp, E. A. Helmkamp 2006-3-19 10093 Amador Northern Sierra Nevada Foothills, Along Calif. Highway 49 south of Plymouth 323 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
  UCD100729  Claytonia perfoliata G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11640 Amador Sacramento Valley/Sierra Nevada Foothills; Hwy CA-24, 3.2 mi southwest of Plymouth near Tonzi Road. 210 Comment
  UCR232206  Claytonia perfoliata subsp. mexicana George K. Helmkamp, E. A. Helmkamp 2011-3-12 17081 Amador Northeastern San Joaquin Valley, along CA-88, 0.8 mile northeast of the San Joaquin County line, c. 3 miles north of Camanche Reservoir 81 Comment
  UCR233112B  Claytonia perfoliata subsp. mexicana George K. Helmkamp, E. A. Helmkamp 2010-3-26 15779 Sacramento Sacramento Valley/lower Sierra Nevada Foothills, along CA-16 (Jackson Rd.), 0.2 mile west of the Amador County line 82 Comment
  UCD95588  Clematis ligusticifolia G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12591 El Dorado northern Sierra Nevada Mountains. Traverse Creek Road at the crossing of Traverse Creek; about 2 miles southeast of its junction with CA-193. 732 Comment
  CLARK-A1045-19  Cleomella obtusifolia George K. Helmkamp 1977-4-23 San Bernardino Trona 2 miles south of Trona; roadside along Trona Road; ; Westend 7.5'Q (Searles Lake 15'Q) 487 Comment
  UCR13836  Cleomella obtusifolia George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  CAS-BOT-BC423204  Cleomella parviflora George Helmkamp; E. A. Helmkamp 1993-7-28 166 Mono Sierra Nevada Mountains: Benton's Crossing of Owens River. 2134 Comment
  CAS-BOT-BC228614  Collinsia bartsiifolia var. bartsiifolia George K. Helmkamp; E. A. Helmkamp 2011-6-7 17492 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
  SBBG129038  Collinsia bartsiifolia var. bartsiifolia G. K. Helmkamp, E. A. Helmkamp 2012-5-31 19090 Calaveras CA-26 E of Mokelumne Hill, at the crossing of the S Fork Mokelumne River 614 Comment
  UCR122501  Collinsia bartsiifolia var. davidsonii George K. Helmkamp, E. A. Helmkamp 2001-5-2 6611 San Luis Obispo South Coast Range, La Panza Range, Calf Canyon, CA Hwy 58, 4.5 mi east of Santa Margarita 335 Comment
  SD167042  Collinsia heterophylla G. K. Helmkamp, E. A. Helmkamp 2005-6-7 9544 San Luis Obispo Outer South Coast Ranges: Along Huasna Road, 1.3 mile west of Huasna Townsite Road. 305 Comment
  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
  UCR222552  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2010-4-17 15897 Placer Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 8.3 miles southwest of its junction with CA-49 near Pilot Hill 308 Comment
  CLARK-A1045-540  Collinsia parviflora George K. Helmkamp 1979-6-5 #2 San Bernardino San Bernardino Mountains at junction of Forest Service road 3N08 with 3N66Y; dry slope under pines; ; Big Bear City 7.5'Q 2285 Comment
  SD197917  Collinsia sparsiflora G. K. Helmkamp, E. A. Helmkamp 2007-4-23 11783 Amador Along Bell Road beside Plymouth Creek just east of Ca-49 in the vicinity of Enterprise. 302 Comment
  SBBG129007  Collinsia sparsiflora var. sparsiflora G. K. Helmkamp, E. A. Helmkamp 2012-4-21 18821 Nevada McCourtney Rd, 0.4 mi E of its jct with Perimeter Rd, 14.5 mi NW (338 deg) of Auburn 407 Comment
  RSA715281  Collinsia tinctoria George K. Helmkamp, E. A. Helmkamp 2006-6-4 10632 El Dorado Northern Sierra Nevada foothills: Rock Creek Road, about 2.2 miles east of its junction with Hwy CA-193. 424 Comment
  UCR176494  Collinsia torreyi George K. Helmkamp, E. A. Helmkamp 2006-8-3 11124 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR170364  Collomia grandiflora George K. Helmkamp, Elizabeth Helmkamp 2005-8-9 9769 El Dorado Northern Sierra Nevada Foothills., WSW of Lake Tahoe; Union Reservoir along Ice House Road; boat ramp and loading area 1476 Comment
  UCR229484  Collomia grandiflora George K. Helmkamp, E. A. Helmkamp 2011-7-26 17882 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
  RSA791379  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2012-5-18 19020 El Dorado Northern Sierra Nevada Mountains Foothills: Capps Crossing Road (Bonnetti Rd.), 0.1 mi northwest of the bridge over Diamond Creek, East of Jenkinson Lake and south of US Hwy 50. 1186 Comment
  UCR197332  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2008-5-8 13425 Calaveras Sierra Nevada Mountains Foothills, Skull Flat road, 0.4 mile north of it junction with Winton Road, northeast of West Point 823 Comment
  UCR234010  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-7-7 17656 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 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
  UCR197279  Comandra umbellata subsp. californica George K. Helmkamp, E. A. Helmkamp 2008-5-29 13520 Calaveras Sierra Nevada Mountains, Arnold Way Road parallel to CA-4 (Ebbetts Pass Hwy), 0.8 mile northeast of Arnold 1265 Comment
  UCR162997  Conium maculatum George K. Helmkamp, E. A. Helmkamp 2005-4-6 9307 Santa Barbara Outer South Coast Ranges, Old Highway US 101, road to Nojoqui Falls, 0.2 mi south of junction with US Highway 101 204 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
  UCR140402  Conyza bonariensis George K. Helmkamp 2004-3-13 8356 San Luis Obispo Central Coast, Nipomo Mesa, along Calif. Hwy 1 (Mesa View Dr.), 0.4 mi south of Halcyon Rd, south of Arroyo Grande 76 Comment
  RSA795965  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2011-9-24 18328 El Dorado Loon Lake Road at the junction to the campground at the south end of the lake 1973 Comment
  UCR177126  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2005-9-23 9896 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
  UCR253626  Conyza canadensis George K. Helmkamp, Elizabeth Helmkamp 2012-11-12 20130 El Dorado Eastern Sacramento Valley, El Dorado Hills; Windfield Parkway 0.2 mile south of White Rock Road 175 Comment
  SD129529  Cordylanthus rigidus subsp. setiger G. K. Helmkamp 1989-10-7 Riverside Edge of moist farmland at the N edge of the fish hatchery in Whitewater Canyon, N of I-10 700 Comment
  SD237614  Cordylanthus tenuis subsp. tenuis G. K. Helmkamp, E. A. Helmkamp 2007-6-27 12629 Placer Sierra Nevada Mountains Foothills: Southeast end of Cisco Grove; along local road just before it passes under Interstate-80 (Cisco Grove 7.5'Q) 1744 Comment
  SEINET2441557  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2009-8-12 15424 Placer Sierra Nevada Mountains: Forest Hill Road, 20.5 miles northeast of the city of Foresthill (Duncan Peak 7.5' Q.). 1662 Comment
  UCR190307  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2007-8-21 12806 El Dorado Northern Sierra Nevada Mountains, unnamed lake at the junction of Angel Creek and Gerle Creek, 0.5 mile west of Wentworth Springs Road 1598 Comment
  UCR209569  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2009-8-8 15409 El Dorado Sierra Nevada Mountains Foothills, along Forebay Road, 5.0 miles northwest of its junction with Poly Express Road in Pollock Pines 954 Comment
  SD237413  Cornus nuttallii G. K. Helmkamp, E. A. Helmkamp 2008-5-15 13446 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. 1054 Comment
  UCR145542  Cotoneaster lacteus George K. Helmkamp, E. A. Helmkamp 2000-6-18 5739 Mendocino North Coast, Glass Beach, Fort Bragg 9 Comment
  UCR160295  Cotula australis George K. Helmkamp 2004-5-2 8565 Santa Barbara Southern Central Coast, Santa Ynez Mountains, Canada del Refugio Rd., 5. mi N of US-101 488 Comment
  UCR121577  Cotula coronopifolia George K. Helmkamp, E. A. Helmkamp 1999-6-28 5011 San Mateo Pescadero Creek Watershed, Bean Hollow Road 0.3 mi south of Pescadero Road (SW of Pescadero). Slopes above Butano Creek 61 Comment
  UCR250278  Crassula connata George K. Helmkamp, E. A. Helmkamp 2009-3-26 14480 Amador Sierra Nevada Mtns. Foothills, south of Ione, CA-88 between Buena Vista Rd. and South Church St. 125 Comment
  UC1787278  Crepis capillaris G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6992 Humboldt North coast redwood area; CA-36, along the Van Duzen R. 19.6 mi E of US-101 (W of Bar W rd). 137 Comment
  UCR121767  Crepis capillaris George K. Helmkamp, E. A. Helmkamp 2001-7-8 6998 Humboldt North Coast, north spit of Samoa Peninsula, 0.5 mi north of CA Hwy 255 bridge over Humboldt Bay 6 Comment
  SD178167  Crocanthemum scoparium G. K. Helmkamp 2004-3-4 8323 San Luis Obispo Central Coast: Nipomo Mesa, along Pomeroy Rd, 0.2 mi north of Willow Rd, northwest of Nipomo. Occasional, in open grassy areas. 91 Comment
  RSA564303  Crocidium multicaule George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 16.1 miles northwest of Canby. Along California Highway 139. 1280 Comment
  UCR179557  Croton setiger George K. Helmkamp, E. A. Helmkamp 2006-9-29 11448 El Dorado Northern Sierra Nevada Mountains Foothills, Salmon Falls Rd just west of Calif. Hwy 49 and 4 miles south of Cool 351 Comment
  UCR194984  Croton setiger George K. Helmkamp, E. A. Helmkamp 2007-10-13 13089 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR232678  Croton setiger George K. Helmkamp, E. A. Helmkamp 2011-10-15 18429 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR229399  Cryptantha affinis George K. Helmkamp, E. A. Helmkamp 2011-8-13 18095 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
  UCR229553  Cryptantha affinis George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18062 Calaveras Northern Sierra Nevada Mountains, Black Springs Road [Forest Route 7N23], 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  SD227777  Cryptantha angustifolia G. K. Helmkamp, E. A. Helmkamp 1998-2-26 2787 San Bernardino Mojave Desert: NW side of Salt Spring Hills about 28 mi N of Baker, between the hills and Hwy CA-127. 200 Comment
  UCR103578  Cryptantha angustifolia George K. Helmkamp 1998-1-17 2546 Riverside Sonoran (Colorado) Desert, Mecca Hills, Box Canyon Road ENE of Mecca and on the north side of the Coachella Canal .3 Comment
  UCR122656  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 1998-3-16 2852 San Bernardino Mojave Desert, north of Calif. Hwy 62 between Joshua Tree and 29 Palms; north on Leer Ave and 0.9 mile E on Amboy Rd. 732 Comment
  CLARK-A1045-262  Cryptantha barbigera George K. Helmkamp 1978-5-1 San Bernardino Rodman Mountains Rodman Mts. 15'Q Comment
  CLARK-A1045-656  Cryptantha circumscissa George K. Helmkamp 1977-5-29 San Bernardino Cima Kelso 15'Q Comment
  UCR163899  Cryptantha decipiens George K. Helmkamp, E. A. Helmkamp 2005-3-30 9255 San Luis Obispo Outer South Coast Ranges, La Panza Range; Pozo Road, 6.5 mi NE of Hi Mountain Road, [c. 1 mi (airline) SW of Pozo Summit] 665 Comment
  UCR99925  Cryptantha echinella George K. Helmkamp 1997-9-29 2440 A Inyo Sierra Nevada Mountains, Onion Valley Road, 7.9 mi west of Hwy US-395 from Independence 2159 Comment
  CAS-BOT-BC249066  Cryptantha flaccida George K. Helmkamp; E. A. Helmkamp 2012-4-14 18766 Butte Northwestern Sacramento Valley: entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River 46 Comment
  SEINET235061  Cryptantha flaccida G. K. Helmkamp, E. A. Helmkamp 1998-5-13 3549 Kern Greenhorn Mtns Southern Sierra Nevada: 6.5 mi. SW of Woody along Bakerfield/Glennville Rd (NE of Bakersfield). Near Hor 396 Comment
  CLARK-A1045-788  Cryptantha maritima George K. Helmkamp 1977-5-14 San Bernardino New York Mountains south end of New York Mountains; Mid Hills 15'Q Comment
  UCR102935  Cryptantha maritima George K. Helmkamp 1998-4-4 3128 Riverside Sonoran (Colorado) Desert, junction of Calif. Hwy 62 (Twentynine Palms Hwy) & Calif. Hwy 177 (Desert Center-Rice Rd) 457 Comment
  UCR103622  Cryptantha maritima George K. Helmkamp, E. A. Helmkamp 1998-3-19 2912 Imperial Sonoran (Colorado) Desert, along Hwy S-24 between the All-American Canal & the Colorado River, 2.0 mi. north of Laguna Dam. 76 Comment
  UCR145544  Cryptantha muricata George K. Helmkamp, E. A. Helmkamp 2000-4-24 5496 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
  UCR15587  Cryptantha oxygona George K. Helmkamp 1978-5-28 s.n. Inyo Owens Valley, Beside the Owens River at Pleasant Valley 1311 Comment
  SD224879  Cryptantha pterocarya var. pterocarya G. K. Helmkamp, E. A. Helmkamp 1998-3-16 2838 San Bernardino 50 ft. N of the boundary of Joshua Tree National Park at the S end of Sunkist Rd (E of town of Joshua Tree). 883 Comment
  CLARK-A1045-566  Cryptantha simulans George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains drying edge of pool; yellow pine forest; Keller Peak 7.5'Q Comment
  UCR157799  Cryptantha simulans George K. Helmkamp, E. A. Helmkamp 1998-6-29 4156 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  SBBG129259  Cryptantha torreyana G. K. Helmkamp, E. A. Helmkamp 2013-7-10 21004 Amador Plasse Rd toward Silver Lake, 0.3 mile south of CA-88/Carson Pass Highway 2276 Comment
  CLARK-A1045-222  Cryptantha utahensis George K. Helmkamp 1979-4-18 Riverside Little San Bernardino Mountains 3.5 miles north of Dillon Road; sandy wash; Lost Horse Mtn. 15'Q Comment
  UCR96680  Cuscuta californica var. californica George K. Helmkamp, E. A. Helmkamp 1996-12-10 1272 San Bernardino Mojave Desert, along Kelbaker Road 6 mi north of National Trails Hwy. 619 Comment
  UCD127371  Cymopterus terebinthinus var. californicus G. K. Helmkamp; E. A. Helmkamp 2006-8-30 11298 Alpine Northern Sierra Nevada Mountains; Woods Lake, south of CA-88 and generally SE of Caples Lake. Besides Woods Creek. 2521 Comment
  UCR178749  Cymopterus terebinthinus var. californicus George K. Helmkamp, E. A. Helmkamp 2006-8-30 11298 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of Calif. Hwy 88 and generally SE of Caples Lake 2521 Comment
  UCR246831  Cymopterus terebinthinus var. californicus George K. Helmkamp, E. A. Helmkamp 2010-7-28 16665 Placer Northern Sierra Nevada Mountains, Forest Hill Road, 1.6 miles west of the junction with Soda Springs Road at Robinson Flat 2040 Comment
  UCR219119  Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2009-8-30 15550 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
  UCR88590  Cynosurus echinatus George K. Helmkamp, E. A. Helmkamp 1995-6-22 95- 4 -12 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UCR219125  Cyperus difformis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15554 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
  UCR134699  Cyperus eragrostis George K. Helmkamp 2003-9-19 8154 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR253809  Cyperus eragrostis George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20106 Placer Sacramento Valley, north of William Lane on an unnamed levee road to Markham Ravine 35 Comment
  UCR262440  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2011-12-9 18502 Placer Sacramento Valley, Sunset Blvd. West, 5.8 miles west of its junction with Fiddyment Road 29 Comment
  UCD141065  Cyperus esculentus G. K. Helmkamp; E. A. Helmkamp 2000-9-1 5959 San Luis Obispo San Luis Obispo County: Los Osos: Martingale at Buckskin. 30 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
  RSA0050409  Cyperus niger George K. Helmkamp, Elizabeth A. Helmkamp 2013-9-13 22286 Amador Volcano Road, 11.4 miles northeast of CA-49 in Sutter Creek, c. 0.4 mi SW of Volcano 608 Comment
  CLARK-A1045-1105  Cystopteris fragilis George K. Helmkamp 1977-7-3 Mono Sierra Nevada Tioga Pass 7.5'Q Comment
  SEINET3257999 Image available Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 2008-5-4 13388 Amador Sierra Nevada Mountains Foothills; along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir. 774 Comment
  UCR196941  Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 2008-6-3 13551 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
  UCD105681  Cytisus scoparius G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12576 El Dorado Northern Sierra Nevada Mountains. Along Hwy CA-193, 1 mile south of Georgetown. 771 Comment
  UCR253222  Cytisus scoparius George K. Helmkamp 2014-4-28 22832 El Dorado Sierra Nevada Mountains Foothills, Pleasant Valley Road at Gold Oak Union School, 0.3 mile west of Moon Lake Dr. 787 Comment
  SEINET7249220  Dactylis glomerata George K. Helmkamp, E. A. Helmkamp 2012-1 19328 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 0.2 mile north of Ice House community, 10.7 miles north of US-50. 1683 Comment
  UCR245600  Dactylis glomerata George K. Helmkamp, E. A. Helmkamp 2012-5-31 19106 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCR103631  Dalea mollissima George K. Helmkamp, E. A. Helmkamp 1998-3-19 2917 Imperial Sonoran (Colorado) Desert, along Hwy S-24 between the All-American Canal & the Colorado River, 2.0 mi. north of Laguna Dam. 76 Comment
  SD236271  Datisca glomerata G. K. Helmkamp, Elizabeth Helmkamp 2005-9-1 9823 El Dorado Northern Sierra Nevada Foothills: E of Sacramento; Sand Canyon Road, 0.3 mi E of CA Highway 49 and Logtown Ridge (Fiddletown 7.5'Q) 280 Comment
  UCR170483  Datisca glomerata George K. Helmkamp, Elizabeth Helmkamp 2005-9-1 9823 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
  UCR147238  Datura stramonium George K. Helmkamp, E. A. Helmkamp 2004-10-8 8834 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCR170580  Daucus carota George K. Helmkamp, E. A. Helmkamp 2005-9-1 9832 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
  UCR171323  Daucus carota George K. Helmkamp, E. A. Helmkamp 2005-7-11 9676 El Dorado Northern Sierra Nevada Foothills, Cameron Park (E of Sacramento, along US Highway 50); corner of Santos Street and Santos Court Road 370 Comment
  UCR190199  Daucus carota George K. Helmkamp, E. A. Helmkamp 2007-7-23 12561 El Dorado Northern Sierra Nevada Mountains Foothills, Rock Creek road, 7.1 miles east of its junction with CA-193 567 Comment
  UCR209568  Daucus carota George K. Helmkamp, E. A. Helmkamp 2009-8-8 15406 El Dorado Sierra Nevada Mountains Foothills, along CA-49, 0.2 mile north of its turn from Pleasant Valley Road in Diamond Springs 561 Comment
  UCR176248  Delphinium depauperatum George K. Helmkamp, E. A. Helmkamp 2006-7-7 10853 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  SBBG128823  Delphinium glaucum G. K. Helmkamp, E. A. Helmkamp 2010-8-20 16814 El Dorado Foster Meadow Rd 0.6 mi W of Mormon Emigrant Trail in the Leek Spring area 2232 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
  UCR130967  Delphinium hansenii subsp. hansenii George K. Helmkamp, E. A. Helmkamp 1998-5-13 3544 Kern Southern Sierra Nevada Mtns., Greenhorn Mtns. Foothills, 6.5 mi. SW of Woody along Bakersfield/Glennville Rd (NE of Bakersfield). Near Horse Canyon 396 Comment
  UCR237097  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2012-7-14 19406 Amador Northern Sierra Nevada Mountains, between CA-88 and the El Dorado County line, 0.9 mile north of Silver Lake along CA-88 2267 Comment
  UCR241330  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2012-6-19 19237 Placer Northern Sierra Nevada Mountains, Foresthill Road, 9.2 miles east of its junction with Devil's Thumb Road 2055 Comment
  UCR242610  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17566 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 0.8 mile northeast of CA-26 at West Point 977 Comment
  UCR122475  Dendromecon rigida George K. Helmkamp, E. A. Helmkamp 1998-5-20 3893 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
  UCR160929  Dendromecon rigida George K. Helmkamp, E. A. Helmkamp 2005-6-5 9514 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
  CLARK-A1045-1108  Deschampsia cespitosa 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; 7300ft; Freel Peak 7.5'Q Comment
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Jan 10 2015
  CAS-BOT-BC227258  Deschampsia danthonioides G. K. Helmkamp; E. A. Helmkamp 2011-7-19 17822 A Tuolumne Northern Sierra Nevada Mountains Foothills: Forestry Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR216922  Deschampsia danthonioides George K. Helmkamp, E. A. Helmkamp 2010-5-4 15955 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
  SEINET4142455 Image available Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2011-5-24 17374 El Dorado Northern Sierra Nevada Mountain Foothills: Mesquite Road, 11.2 mi. S of junction with Wentworth Springs Road, 7.3 mi. NE of Placerville 1073 Comment
  SEINET4691438  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2011-1 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 degrees) of Placerville. 1073 Comment
  UCD63239  Deschampsia elongata G. K. Helmkamp; E. A. Helmkamp 2007-8-4 12680 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
  UCR134487  Descurainia californica George K. Helmkamp, E. A. Helmkamp 1998-8-10 4271 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR91711  Descurainia incisa subsp. incisa George K. Helmkamp 1996-6-11 1131 San Bernardino San Bernardino Mtns., 1.2 miles SW of Tulip Lane, city of Big Bear Lake 2143 Comment
  UCR102968  Descurainia pinnata George K. Helmkamp, E. A. Helmkamp 1998-3-16 2826 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
  UCR122170  Descurainia pinnata George K. Helmkamp, E. A. Helmkamp 2000-4-22 5479 San Luis Obispo Central Coast, Los Osos, between the west end of Howard Ave. and Morro Bay sand dunes 15 Comment
  UCR37633  Descurainia sophia George K. Helmkamp 1984-4-20 840420- 21 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
  RSA0062472  Dicentra formosa George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-6 20966 Amador Bear River Road at the south end of the dam for Lower Bear River Reservoir. 1784 Comment
  RSA755333  Dicentra formosa George K. Helmkamp, E. A. Helmkamp 2009-4-22 14568 Placer town of Foresthill, along Forest Hill Road 988 Comment
  SEINET4691850  Dicentra formosa George K. Helmkamp, E. A. Helmkamp 2011-1 17508 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
  UCR191122  Dicentra formosa George K. Helmkamp, E. A. Helmkamp 2007-8-29 12829 Yuba Northern Sierra Nevada Mountains Foothills, Mountain House Road 0.6 mile west of the Sierra Co. line; Sleighville area beside Willow Creek 1021 Comment
  UCR196830  Dicentra formosa George 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
  CAS-BOT-BC500068  Dichelostemma capitatum G. K. Helmkamp; E. A. Helmkamp 2008-5-22 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
  UCD139194  Dichelostemma capitatum subsp. capitatum G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11652 Calaveras Eastern Sacramento Valley; about 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCD139227  Dichelostemma capitatum subsp. capitatum G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11655 Calaveras Eastern Sacramento Valley: about 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCR173178  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10124 El Dorado Northern Sierra Nevada Foothills, Greenstone Road, c. 0.3 mi N of Pleasant Valley Road (ENE of Shingle Springs and south of US Hwy 50) 457 Comment
  UCR257899  Dieteria canescens George K. Helmkamp, Amy Barnes 2014-8-27 23064 Mono Northern Sierra Nevada Mountains, Monitor Pass along CA-89, 4.7 miles west of the junction with CA-395 2040 Comment
  SD243208  Digitalis purpurea George K. Helmkamp, E. A. Helmkamp 2011-9-30 18352 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
  UCR106434  Digitalis purpurea George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2188 Mendocino North Coast, Big River, 0.2 mi east of US-1, south of Mendocino 6 Comment
  UCR132045  Digitaria sanguinalis George K. Helmkamp 2003-7-31 8052 B San Luis Obispo Central Coast, west edge of Nipomo Hill at junction of Cienaga Rd. and Valley View Road 15 Comment
  UCR253197  Digitaria sanguinalis George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22138 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 4.8 miles northeast of the town of Sutter Creek 405 Comment
  SD237622  Diplacus torreyi G. K. Helmkamp, E. A. Helmkamp 2009-8-12 15425 Placer Sierra Nevada Mountains: Forest Hill Road, 20.5 miles ortheast of the city of Foresthill (Duncan Peak 7.5'Q) 1662 Comment
  UCR59777  Ditaxis lanceolata George K. Helmkamp 1989-9-17 s.n. Imperial Sonoran (Colorado) Desert, Beside Indian Pass Rd, 7.2 mi NE of Ogilby Rd (S34). 220 Comment
  CLARK-A1045-1213  Ditaxis neomexicana George K. Helmkamp 1977-1-22 Imperial Yuha Desert where Pinto Wash crosses State Highway 98; ; Yuha Basin 7.5'Q Comment
  SD167138  Ditaxis neomexicana G. K. Helmkamp 1998-4-4 - 3180 Riverside 2.3 miles north of Highway I-10 on Eagle Mountain Road. 274 Comment
  SD243079  Dittrichia graveolens George K. Helmkamp, E. A. Helmkamp 2011-10-15 18449 Stanislaus Eastern San Joaquin Valley: along J-4 (Milton Road), 1.7 miles south of its junction with CA-4, 12 miles NE (44a^z) of Escalon (Farmington 7.5'Q) 64 Comment
  UCR235298  Dittrichia graveolens George K. Helmkamp, E. A. Helmkamp 2011-11-21 18473 San Joaquin Northeastern San Joaquin Valley, Collier Road, 0.4 mile west of its junction with CA-88, 1.7 mi. NE (18 deg. ) of Clements 37 Comment
  UCR162160  Dodecatheon clevelandii subsp. insulare George K. Helmkamp, E. A. Helmkamp 2005-2-14 8925 San Luis Obispo Outer South Coast Ranges, Santa Lucia Mtns. Huasna Canyon along Huasna Road; 8.5 mi east of its junction with Lopez Road 277 Comment
  UCR185217  Dodecatheon hendersonii George K. Helmkamp, E. A. Helmkamp 2007-4-23 11786 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
  UCSB71615  Draba verna Helmkamp, G.; Helmkamp, E. 2007-3-22 El Dorado Foothills, Northern Sierra Nevada Mountains; Mt. Aukum Road at the crossing of the middle fork of Cosumnes river, west of jct. of Bucks Bar Road (Camino 7.5' Q.:+/- 1000m) 622 Comment
  UCR209741  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 1662 Comment
  UCD113061  Drymocallis glandulosa G. K. Helmkamp; E. A. Helmkamp 2007-4-29 11876 El Dorado Northern Sierra Nevada Mountains: Lake Oaks mobile home park, Diamond Springs. 524 Comment
  UC2046875  Drymocallis lactea George K. Helmkamp with E. A. Helmkamp 2012-6-19 19238 Placer Northern Sierra Nevada Mountains: Foresthill Road, 9.2 miles east of its junction with Devil's Thumb Road. Duncan Peak 7.5' Quad. Comment
  UCD113034  Drymocallis lactea var. austiniae G. K. Helmkamp; E. A. Helmkamp 2007-6-6 12267 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 6.3 miles east of its junction with Sly Park Road. 1607 Comment
  UC2015565  Drymocallis lactea var. lactea G. Helmkamp 1995-9-23 3 -26 Alpine West side of Sonora Pass just beyond the Mono County line. 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
  IRVC29203  Dryopteris arguta G. K. Helmkamp, E. A. Helmkamp 2004-9-29 8808 Santa Barbara Stagecoach Road at junction with Hwy CA-154, SE of Lake Cachuma Santa Ynez Mountains 561 Comment
  UCR194873  Dryopteris arguta George K. Helmkamp, E. A. Helmkamp 2007-5-26 12121 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of North San Juan 610 Comment
  UCR200907  Dryopteris filix-mas George K. Helmkamp, E. A. Helmkamp 2008-8-30 14062 Amador Northern Sierra Nevada Mountains, along Cole Creek Road near the crossing of Cole Creek 6.8 miles east of the Bear River Reservoir dam 1857 Comment
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Mar 13 2018
  UCR158374  Dudleya caespitosa George K. Helmkamp, E. A. Helmkamp 2004-6-24 8719 Santa Barbara Central Coast, between Ocean Park [Rd.] and Pacific Ocean at Surf; NW of Lompoc 15 Comment
  CAS-BOT-BC227263  Dudleya cymosa subsp. cymosa George K. Helmkamp; E. A. Helmkamp 2011-5-10 17246 Amador Northern Sierra Nevada Mountains Foothills: along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg. ) of town of Sutter Creek 412 Comment
  UCR173261  Dudleya cymosa subsp. cymosa George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10424 Placer Northern Sierra Nevada foothills, 2.1 mi south of Auburn along Calif. Hwy 49 293 Comment
  CLARK-A1045-727  Dyssodia cooperi George K. Helmkamp 1978-5-1 San Bernardino Mojave Desert at camp road; Ord Mts 15'Q Comment
  CLARK-A1045-686  Dyssodia pentachaeta George K. Helmkamp 1978-5-6 San Bernardino Mojave Desert Kingston Road; Clark Mt 15'Q Comment
  UCR210046  Echinochloa colona George K. Helmkamp, E. A. Helmkamp 2009-8-14 15462 El Dorado Foothills, northern Sierra Nevada Mountains, Bucks Bar Road, 3.9 miles south of Pleasant Valley Road 625 Comment
  UCR253540  Echinochloa colona George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20086 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
  SEINET1908436  Echinochloa crus-galli G. K. Helmkamp, E. A. Helmkamp 2008-1 14269 Colusa Sacramento Valley: along CA-20, 2 miles west of Meridian. 14 Comment
  UCR218955  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2009-8-30 15564 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
  SD243080  Eclipta prostrata George K. Helmkamp, E. A. Helmkamp 2011-10-8 18395 Glenn Northern Sacramento Calley: Co. Road 61 (Riz Road), 2.6 miles east of CA-45 and at the junction with C. Road V, 8.26 miles SE (124a^z) of Willows (Princeton 7.5'Q) 25 Comment
  UCR140103  Ehrharta calycina George K. Helmkamp 2004-2-6 8252 San Luis Obispo Central Coast, Riverside Road at the low end of Nipomo Mesa beside Division Road 46 Comment
  UCR15634  Eleocharis acicularis var. acicularis George K. Helmkamp 1978-6-1 s.n. Riverside Santa Ana Mountains, Santa Rosa Plateau, vernal pool 7 mi [west] of Murrieta near the origin of DeLuz Creek 671 Comment
  UCR257596  Elymus caput-medusae George K. Helmkamp, Amy Barnes 2014-3-21 22645 Placer Sacramento Valley, Sheridan, Riosa Road at the west side of its junction with old CA-65 33 Comment
  UCR257602  Elymus caput-medusae George K. Helmkamp, Amy Barnes 2014-3-21 22637 Placer Sacramento Valley, Riosa Road at the east side of its junction with CA-65, just west of Sheridan 33 Comment
  UCR82266  Elymus cinereus George K. Helmkamp 1994-7-28 105- 5 Mono Sierra Nevada Mtns., Long Valley, along US-395, 1.3 mi east of South Landing turnoff to Crowley Lake 2104 Comment
  UCR121156  Elymus elongatus George K. Helmkamp, E. A. Helmkamp 2001-6-3 6805 Solano San Francisco Bay Region, Hammond Island SE of Fairfield. Grizzly Rd., 7.5 mi SE of entrance to wildlife preserve 6 Comment
  SEINET9262054  Elymus elymoides George K. Helmkamp, Elizabeth Helmkamp 2013-1 21036 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail at the junction with Pilliken Road (Leek Spring Hill 7.5 Q) 1823 Comment
  UCR248708  Elymus elymoides subsp. californicus George K. Helmkamp, Belinda Pesheck 2013-7-14 21048 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
  UCR257836  Elymus elymoides subsp. californicus George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19707 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
  CAS-BOT-BC227255  Elymus glaucus G. K. Helmkamp; E. A. Helmkamp 2011-7-19 17850 Calaveras Northern Sierra Nevada Mountains Foothills: Forestry Route 5N75, 1.1 miles west of Boards Crossing bridge over North Fork Stanislaus River 1220 Comment
  SEINET3815557 Image available Elymus 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 E of Pope Road in San Andreas 387 Comment
  UCR170275  Elymus glaucus George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9868 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
  UCR234644  Elymus glaucus George K. Helmkamp, E. A. Helmkamp 2011-6-2 17443 Nevada Northern Sierra Nevada Mountains Foothills, Lake Wildwood, along Pleasant Valley Road, 1.2 miles north of its junction with CA-20 433 Comment
  SEINET7249317  Elymus glaucus George K. Helmkamp, Elizabeth Helmkamp 2013-1 Calaveras Comment
  UCR240900  Elymus glaucus subsp. glaucus George K. Helmkamp, E. A. Helmkamp 2012-6-19 19213 Placer Northern Sierra Nevada Mountains Foothills, Foresthill Road, 2.6 miles east of its junction with Mosquito Ridge Road in Forest Hill 1052 Comment
  UCR256970  Elymus glaucus subsp. glaucus George K. Helmkamp 2014-5-17 22893 Calaveras Sierra Nevada Mountains Foothills, between Sandy Gulch and Glencoe along CA-26, 0.1 mile north of the bridge over South Fork Mokelumne River 608 Comment
  UCR257901  Elymus glaucus var. glaucus George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19437 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
  UCR233124A  Elymus ponticus George K. Helmkamp, E. A. Helmkamp 2011-9-23 18307 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 8.6 miles north of its junction with US-50 1613 Comment
  UCR250594  Elymus ponticus George K. Helmkamp, E. A. Helmkamp 2007-8-16 12771 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 0.9 mile northeast of the junction with Bear River Reservoir Road 2076 Comment
  UCR102988  Emmenanthe penduliflora George K. Helmkamp, E. A. Helmkamp 1998-3-16 2835 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
  UCR122750  Emmenanthe penduliflora George K. Helmkamp, E. A. Helmkamp 1998-4-24 3384 Riverside Santa Rosa Mountains, Palms-to-Pines Hwy (Calif. Hwy 74), 1 mi north of Carrizo Rd near Black Hill 1006 Comment
  UCD131283  Encelia californica G. Helmkamp 1997-6-21 2066 San Luis Obispo San Luis Obispo County: Questa Ridge north of San Luis Obispo and 0.4 mile west of radio towers. 260 Comment
Read comments
May 31 2014
  RSA0050411  Epilobium George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-14 22223 Alpine Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  UCR257863  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, Amy Barnes 2012-8-12 19617 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  IRVC28934  Epilobium brachycarpum G. K. Helmkamp 2003-10-24 8220 San Luis Obispo El Campo Rd 0.1 mi E of Los Berros Rd, SE of Arroyo Grande Central Coast 46 Comment
  SEINET11265850  Epilobium brachycarpum George Helmkamp, E. A. Helmkamp 2010-10-20 17034 Sutter Sacramento Valley: Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (1051/4) of Trowbridge (Sheridan 7.5' Q.); 0 17 Comment
  SEINET6175664  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-8-30 12850 El Dorado Foothills, northern Sierra Nevada Mountains: Prospector Road, 0.1 mile north of Marshall Road near Indian Creek. (Coloma 7.5' Q.).; 0 268 Comment
  UCD105317  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-8-30 12850 El Dorado Northern Sierra Nevada Mountains: Prospector Road, 0.1 mile north of Marshall Road near Indian Creek. 268 Comment
  UCD105373  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13051 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCR209033  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2009-8-19 15500 El Dorado Sierra Nevada Mountains, along Ice House Road at SW shore of Loon Lake, 2.6 miles south of its end on the north side of the lake 1973 Comment
  UCR230732  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-20 17034 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
  UCR231878  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2010-10-16 17032 Placer Northern Sierra Nevada Mountains Foothills, Sugar Pine Road at the southwest corner of Sugar Pine Reservoir near the dam 1128 Comment
  UCR233363  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2011-9-16 18289 Calaveras Northern Sierra Nevada Mountains Foothills, Bald Mountain Road, at the south side of the bridge over Hunter Creek, 8.8 miles northeast of the junction of Blue Mountain Road and Rail Road Flat Road 1034 Comment
  UCR248398  Epilobium brachycarpum George K. Helmkamp, Elizabeth Helmkamp 2013-7-25 22022 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road, 7.4 miles east of the junction with Volcanoville Road 1320 Comment
  UCR253799  Epilobium brachycarpum George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20063 San Joaquin San Joaquin Valley, along Hwy J-6 (Escalon-Bellota Road), 1.2 miles south of its junction with CA-26 46 Comment
  UCR67373  Epilobium brachycarpum George K. Helmkamp 1990-9-23 E- 17 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UCR146843  Epilobium canum subsp. canum George K. Helmkamp, E. A. Helmkamp 2004-9-29 8807 Santa Barbara Santa Ynez Mountains, Stagecoach Road at junction with Calif. Hwy 154, SE of Lake Cachuma 561 Comment
  UCR140990  Epilobium ciliatum George K. Helmkamp, E. A. Helmkamp 1998-8-10 4277 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCD105950  Epilobium foliosum G. K. Helmkamp; E. A. Helmkamp 2007-9-1 12863 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
  UCR176035  Epilobium glaberrimum subsp. fastigiatum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10969 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR258997  Epilobium hallianum George K. Helmkamp, Amy Barnes 2014-9-16 23083 A 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
  UCR176389  Epilobium pallidum George K. Helmkamp, E. A. Helmkamp 2006-7-10 10897 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 6.1 miles north of Hwy US-50; at the junction with the road from Ice House Reservoir 2030 Comment
  UCR257163  Epilobium pallidum George K. Helmkamp, Mary Alice Barnes 2013-5-17 20623 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
  CLARK-A1045-1056  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
  UCR229450  Epilobium torreyi George K. Helmkamp, E. A. Helmkamp 2011-7-30 17949 El Dorado Northern Sierra Nevada Mountains, Omo Ranch Road, 7.4 miles southeast of Omo Ranch, 1.9 mi. NW (304 deg. ) airline of Hwy 88 junction 1372 Comment
  SD129117  Equisetum telmateia subsp. braunii G. Helmkamp 1989-8-6 San Luis Obispo just north of Cayucos, Toro Canyon Road, east of U. S. Hwy 101 120 Comment
  UCR59222  Eragrostis barrelieri George K. Helmkamp 1989-7-20 s.n. San Bernardino Mojave Desert, Yucca Valley 976 Comment
  SD236145  Eragrostis curvula G. K. Helmkamp 2004-6-12 8632 Santa Barbara Southern outer coast ranges.: Along Hwy CA-135, 0.9 mi N of San Antonio Rd (S of Orcutt) 152 Comment
  UCR25556  Eragrostis lehmanniana George K. Helmkamp 1981-10-8 s.n. San Bernardino Eastern Mojave Desert, Along Hwy I-40, 0.5 mi west of the turn-off to Mitchell Caverns State Park Comment
  UCR101085  Eragrostis mexicana George K. Helmkamp 1997-9-30 2502 Inyo Sierra Nevada Mtns., Big Pine Creek 2287 Comment
  SD253335  Eragrostis mexicana subsp. virescens George K Helmkamp, Elizabeth Helmkamp 2013-10-22 22451 Amador Sierra Nevada Moutains Foothills: Shanendoah Road, ner Somon Creek, 6.8 miles NE of its juncton with CA-49 in Plymouth (Fiddletown 7.5'Q) 562 Comment
  SEINET2473440 Image available Eragrostis mexicana subsp. virescens George K. Helmkamp, E. A. Helmkamp 2007-1 12853 El Dorado Foothills, northern Sierra Nevada Mountains; Prospector Road, 0.1 mile north of Marshall Road near Indian Creek 2768 Comment
  UCR189920  Eragrostis mexicana subsp. virescens George K. Helmkamp, E. A. Helmkamp 2007-8-30 12853 El Dorado Foothills, northern Sierra Nevada Mountains, Prospector Road, 0.1 mile north of Marshall Road near Indian Creek 268 Comment
  UCR161105  Eriastrum luteum George K. Helmkamp, E. A. Helmkamp 2005-6-12 9646 San Luis Obispo South Central Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 6.7 miles east of Santa Margarita 485 Comment
  UCR13832  Eriastrum wilcoxii George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  UCR14382  Eriastrum wilcoxii George K. Helmkamp 1974-7-27 s.n. Inyo Pleasent Valley, Owens River 9 miles NW of Bishop 1313 Comment
  UCR230721  Ericameria arborescens George K. Helmkamp, E. A. Helmkamp 2010-9-30 16985 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.2 miles south of its junction with Peavine Road, 0.9 mi. (air) N of I-50 1448 Comment
  UCR233023  Ericameria cuneata var. cuneata George K. Helmkamp, E. A. Helmkamp 2011-9-24 18326 El Dorado Northern Sierra Nevada Mountains, Loon Lake [Ice House] Road, 4.1 miles NNE of its junction with Wentworth Springs Road 1942 Comment
  UCR13855  Ericameria ericoides George K. Helmkamp 1973-8-8 s.n. San Luis Obispo Central Coast, Morro Bay, Baywood Park, hillside c. 1 mi from ocean 3 Comment
  UCR142155  Ericameria ericoides George K. Helmkamp 2002-8-21 7630 San Luis Obispo Central Coast, Los Osos at the west end of Howard St. 15 Comment
  UCR104784  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 1997-3-8 1413 San Luis Obispo c. 6 mi. west of Soda Lake Rd along Calif. Hwy 58 549 Comment
  UCR131358  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 1999-4-16 4671 San Diego Sweetwater River Drainage, Japatul Rd 1/2 mi SE of Loveland Reservoir. 488 Comment
  UCR257742  Ericameria nauseosa var. speciosa George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19471 Sierra Northern Sierra Nevada Mountains, Little Truckee River valley along Hwy CA-89, 3.5 road miles north of the Nevada County line, 9.6 air miles SE (136 deg. ) of Sierraville 1878 Comment
  UCD131545  Ericameria parryi var. nevadensis G. K. Helmkamp; E. A. Helmkamp 2007-9-15 12969 El Dorado Northern Sierra Nevada Mountains: Ice House Road 4.3 miles north of its junction with US-50. 1393 Comment
  UCR14388  Erigeron breweri var. bisanctus George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns, E fork of Santa Ana River, 3 mi. below Calif. Hwy 38. [Seven Oaks area] 1677 Comment
  UCD131762  Erigeron canadensis G. K. Helmkamp; E. A. Helmkamp 2007-9-9 12917 Sacramento Sacramento Valley: Along Hwy. CA-16, 0.8 mile west of the Amador County line. 85 Comment
  UCR15403  Erigeron compositus George K. Helmkamp 1977-7-3 s.n. Mono Sierra Nevada Mtns, just outside of Yosemite [National Park] in the Tioga Pass area [along Hwy 120] 2988 Comment
  UCR116019  Erigeron coulteri George K. Helmkamp, E. A. Helmkamp 2000-7-18 5882 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
  UCR257649  Erigeron divergens George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19495 Sierra Northern Sierra Nevada Mountains, Stampede Dam Road, 1.7 miles north of the Nevada County line, just east of Stampede Reservoir 1770 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
  UCD132015  Erigeron miser G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11254 Nevada Northern Sierra Nevada Mtns, about 0.7 mile east of Donner Pass, along Donner Pass Road. 2041 Comment
  UCR190553  Erigeron peregrinus George K. Helmkamp 2007-6-29 12458 Amador Northern Sierra Nevada Mountains, south side of CA-88, 0.2 mile west of Carson Spur summit 2421 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
  UCR275046  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2000-7-17 5813 Mono Sierra Nevada Mountains, South Twin Lake along Lake Mary Road, 3 miles SW of Mammoth Lakes 2561 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
  UCR230619  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2011-5-10 17249 Amador Northern Sierra Nevada Mountains Foothills, along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg. ) of town of Sutter Creek 412 Comment
  SBBG128843  Eriodictyon lobbii G. K. Helmkamp, E. A. Helmkamp 2010-8-14 16801 Placer American Hill Rd, 1.2 mi S of its jct with Foresthill Rd 1567 Comment
  UCR110967  Eriodictyon trichocalyx George K. Helmkamp 1998-6-27 4098 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
  UCR134476  Eriogonum baileyi var. baileyi George K. Helmkamp, E. A. Helmkamp 1998-8-10 4261 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 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
  UCR15411  Eriogonum esmeraldense var. esmeraldense George K. Helmkamp 1977-7-3 s.n. Mono Owens Valley, Owens River Road at Big Springs 2195 Comment
  UCR130700  Eriogonum fasciculatum var. foliolosum George K. Helmkamp, E. A. Helmkamp 1999-4-17 4676 San Diego Peninsular Ranges, Barrett-Smith Rd between Barrett Junction & Barrett School Rd. NE of Calif. Hwy 94 268 Comment
  UCR132760  Eriogonum fasciculatum var. foliolosum George K. Helmkamp 2003-7-29 8029 B San Luis Obispo Central Coast, 0.6 mi south of Nipomo Hill in Arroyo Grande area 46 Comment
  UCR102548  Eriogonum latifolium George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-26 2144 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR131859  Eriogonum latifolium George K. Helmkamp, E. A. Helmkamp 2000-6-18 5737 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  CAS-BOT-BC249061  Eriogonum marifolium George K. Helmkamp; E. A. Helmkamp 2011-8-26 18189 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
  UCR237282  Eriogonum marifolium George K. Helmkamp, E. A. Helmkamp 2012-7-2 19304 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam of Lower Bear River Reservoir 1774 Comment
  RSA518445  Eriogonum microtheca var. ambiguum George K. Helmkamp 1990-9-23 D- 9 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  UCR176410  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2006-8-7 11155 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 16.7 miles east of its junction with Sly Park Road 1944 Comment
  UCR197510  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2008-7-11 13763 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
  UCR230618  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17844 Tuolumne Northern Sierra Nevada Mountains Foothills, Forest Route 5N14, 0.6 mile southeast of Boards Crossing bridge of North Fork Stanislaus River 1221 Comment
  UCR231841  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2010-8-14 16788 Placer Northern Sierra Nevada Mountains, American Hill Road (Forest Route 13), 4.7 miles south of its junction with Foresthill Road and just south of a creek crossing 1552 Comment
  UCR253097  Eriogonum nudum var. deductum George K. Helmkamp, Belinda Pesheck 2013-7-14 21070 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  UCR258418  Eriogonum nudum var. deductum George K. Helmkamp, Amy Barnes 2014-8-11 22988 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCR233648  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2011-7-17 17765 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg. ) of Peardale 686 Comment
  UCR241749  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2012-9-25 19925 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 1.2 miles north of CA-20, N of I-80 between Grass Valley and Truckee 1427 Comment
  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
  UCR95909  Eriogonum nummulare George K. Helmkamp 1996-10-17 1257 Mono Owens Valley, 0.2 mi. south of Benton Hot Springs, beside Calif. Hwy 120 1745 Comment
  UCSB42236  Eriogonum parvifolium Helmkamp, G. 1973-8-8 San Luis Obispo Baywood Park Comment
  RSA667315  Eriogonum parvifolium var. parvifolium George K. Helmkamp, E. A. Helmkamp 2000-6-15 5692 San Luis Obispo Coastal strand between Los Osos and sand dunes W of the end of Howard St. 15 Comment
  UCR18555  Eriogonum roseum George K. Helmkamp 1974-10-18 s.n. Madera Sierra Nevada Mtns. Foothills, Fresno River at Yosemite Forks 854 Comment
  CLARK-A1045-1051  Eriogonum spergulinum subsp. reddingianum George K. Helmkamp 1977-9-1 IV Mono Antelope Valley along River, one mile north of Coleville; ; Coleville 7.5'Q 1676 Comment
  UCR26660  Eriogonum spergulinum var. reddingianum George K. Helmkamp 1982-7-1 s.n. Mono Owens Valley, along the Owens River at Arcularius Ranch 2149 Comment
  RSA614560  Eriogonum thomasii George K. Helmkamp 1998-3-30 3040 San Bernardino Vicinity of Twentynine Palms; Encelia Rd, 1.0 mi. N of CA hwy 62. 793 Comment
  CLARK-A1045-200  Eriogonum thurberi George K. Helmkamp 1979-4-29 San Bernardino Morongo Valley Morongo Valley 7.5'Q Comment
  CLARK-A1045-374  Eriogonum trichopes George K. Helmkamp 1977-5-30 San Bernardino Kelso roadside; south edge of sand dunes; ; Kelso 15' Q; Kelso 7.5' Q 609 Comment
  UCR253075  Eriogonum umbellatum George K. Helmkamp, Belinda Pesheck 2013-7-14 21083 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  CLARK-A1045-601  Eriogonum wrightii George K. Helmkamp 1977-10-22 San Bernardino San Bernardino Mountains roadside; ; Forest Falls 7.5' Q 1554 Comment
  HSC104169  Eriogonum wrightii var. subscaposum G. K. Helmkamp, E. A. Helmkamp 2012-8-24 19716 Alpine Northern Sierra Nevada Mountains; along CA-88 at the Red Vista Rd. junction, east end of Carson Pass near Red Lake 2619 Comment
  UCR257945  Eriogonum wrightii var. subscaposum George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19716 Alpine Northern Sierra Nevada Mountains, along CA-88 at the Red Vista Rd. junction, east end of Carson Pass near Red Lake 2619 Comment
  CLARK-A1045-356  Eriophyllum ambiguum George K. Helmkamp 1977-5-30 F San Bernardino Kelso Kelso Road summit, north of Kelso; ; Kelso 15'Q 1066 Comment
  UCR160761  Eriophyllum confertiflorum George K. Helmkamp, E. A. Helmkamp 2005-6-5 9518 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
  UCR140981  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp 2004-4-23 8516 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd, 12.9 mi from Hwy-Calif. Hwy 154 at San Olivos jct. 1159 Comment
  UCR159385  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 2005-5-12 9430 Monterey Central Coast Ranges, 8 mi west of US-101 on Calif. Highway G18 in Hames Valley 341 Comment
  UCR173305  Eriophyllum lanatum George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10471 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
  SEINET3245784  Eriophyllum lanatum var. achilleoides G. K. Helmkamp, E. A. Helmkamp 2009-1 14845 Sierra Northern Sierra Nevada Foothills: along CA-49, 1.6 miles north of the Yuba County line (Camptonville 7.5') 902 Comment
  UCD132202  Eriophyllum lanatum var. achilleoides G. K. Helmkamp; Elizabeth Helmkamp, Amy Barnes 2007-6-20 12367 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
  UCR194911  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2007-5-26 12128 Yuba Northern Sierra Nevada Mountains Foothills, along CA-49, 1.3 miles south of Camptonville 802 Comment
  UCR194950  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2007-5-18 12021 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road, 4.2 miles southeast of Foresthill 793 Comment
  UCR196979  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2008-5-20 13464 Yuba Sierra Nevada Mountains Foothills, along CA-49, 0.1 mile north of the Nevada Co. line at Oregon Creek 466 Comment
  UCR245599  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2012-5-31 19107 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCD132189  Eriophyllum lanatum var. croceum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-20 10497 El Dorado Northern Sierra Nevada Foothills: Along CA Hwy 193, 0.8 mi. South of Kelsey. 604 Comment
  SD239592  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, E. A. Helmkamp 2011-5-19 17291 Amador Lower Sierra Nevada Foothills: NW of Pardee Reservoir, 0.1 mile east of Rock Creek Road on a gravel spur leading to houses, 4.65 mi. SW (220a^z) of Jackson. 280 Comment
  SEINET9262042  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, Elizabeth Helmkamp 2013-1 20830 Placer Northern Sierra Nevada Mountains Foothills; Yankee Jims Road, 3.6 miles northwest of its junction with Forest Hill Road (Foresthill 7.5 Q) 463 Comment
  UCR256646  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20731 Nevada Northern Sierra Nevada Mountains, along Hwy CA-20, 1.6 miles northeast of Pine Flat Way, north of Scotts Flat Reservoir 1189 Comment
  RSA755902  Eriophyllum lanatum var. integrifolium George K. Helmkamp, Amy Barnes 2009-7-8 15164 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
  UCR102989  Eriophyllum pringlei George K. Helmkamp, E. A. Helmkamp 1998-3-16 2837 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
  UCR158437  Eriophyllum staechadifolium George K. Helmkamp 2004-6-15 8633 San Luis Obispo Central Coast, Between Oso Flaco Lake and the Pacific Ocean, c. 0.3 mi WNW of the lake 9 Comment
  CLARK-A1045-301  Eriophyllum wallacei George K. Helmkamp 1977-3-20 Riverside Deep Canyon dry wash of Deep canyon; ; Palm Desert 15'Q Comment
  UCR64010  Eriophyllum wallacei George K. Helmkamp 1984-4-20 840420- 9 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
  UCD105612  Erodium botrys G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11891 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR140768  Erodium botrys George K. Helmkamp 2004-3-13 8353 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR233131A  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2011-5-21 17324 Calaveras Northern Sierra Nevada Mountains Foothills, Ridge Road, 1.9 rd. miles southeast of CA-26, 1.8 air mi. southeast (130 deg. ) of Glencoe 863 Comment
  UCR257553  Erodium cicutarium George K. Helmkamp, Amy Barnes 2014-3-21 22593 Sutter Sacramento Valley, along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air mi. SW of Sutter 13 Comment
  UCR140471  Erodium moschatum George K. Helmkamp 2004-3-13 8354 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR61738  Erysimum capitatum George K. Helmkamp 1990-4-19 s.n. San Luis Obispo along State Hwy 58 at San Juan Creek, west of Simmler-Bitterwater Road 488 Comment
  SD239918  Erythranthe bicolor George K. Helmkamp, E. A. Helmkamp 2011-8-6 17957 Amador Northern Sierra Nevada Mountains: Ellis Road, 2.1 miles south of its junction with CA-88 (Peddler Hill 7.5'Q) 1794 Comment
  SEINET4178676 Image available Erythranthe guttata George K. Helmkamp, E. A. Helmkamp 2010-1 16706 Calaveras Northern Sierra Nevada Mountains: Forest route 7N23 0.1 mile north of the junction with CA-4. 2004 Comment
  SEINET2472421 Image available Erythranthe lewisii George K. Helmkamp, E. A. Helmkamp 2008-1 13844 Alpine Northern Sierra Nevada Mountains; 0.1 mile south of CA-88 on a dead-end spur south of Carson Pass 2590 Comment
  UCR206878  Eschscholzia George K. Helmkamp, E. A. Helmkamp 2009-3-6 14341 El Dorado Northern Sierra Nevada Mtns. Foothills, Rock Creek Road, 4.9 miles east of its junction with CA-193 and near Rock Creek 483 Comment
  SEINET5586229  Eschscholzia caespitosa G. K. Helmkamp, E. A. Helmkamp 2007-1 11709 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
  UCR233450  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2011-4-1 17124 Colusa Eastern Foothills North Coast Ranges, Antelope Valley, along Maxwell-Sites Road, 0.4 miles southeast of Sites 93 Comment
  UCD95314  Eschscholzia californica G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11811 Amador Northern Sierra Nevada Mountains - junction of Tonzi Road and CA-124 about 7 miles north of Ione. 229 Comment
  UCR90020  Eschscholzia glyptosperma George K. Helmkamp 1995-3-28 s.n. San Bernardino Eastern Mojave Desert, Beside old US hwy 66, 11.5 mi east of Goffs 650 Comment
  UCD95369  Eschscholzia lobbii G. K. Helmkamp; E. A. Helmkamp 2007-3-14 11634 Sacramento Sacramento Valley near the edge of Sierra Nevada Mountains; Latrobe Rd. about 5.7 miles west of Latrobe and 1.5 miles W of the El Dorado Co. line. 110 Comment
  UCR234194  Eschscholzia lobbii George K. Helmkamp, E. A. Helmkamp 2011-4-10 17163 Yuba Sacramento Valley, along Camp Beale Highway/Spenceville Rd., c. 1.75 miles northeast of Wheatland 44 Comment
  UCR237308  Eschscholzia lobbii George K. Helmkamp, E. A. Helmkamp 2012-4-14 18759 Butte Northwestern Sacramento Valley, Cox Lane, 1.3 miles west of its intersection with La Loma Way, c. 10.3 mi. ENE (82 deg. ) of Gridley 91 Comment
  UCR250181  Eschscholzia lobbii George K. Helmkamp 2013-3-9 20158 Sutter Northern Sacramento Valley, West Butte Road, 5.5 miles north of its junction with West Butte Pass Road, NW foot of Sutter Buttes 24 Comment
  CAS-BOT-BC419631  Eschscholzia parishii G. K. Helmkamp; E. A. Helmkamp 1998-2-18 2735 Riverside Colorado Desert: Chuckwalla Mts. 10.6 mi SW of Chuckwalla Valley Rd. on Graham Pass Road Comment
  SD225054  Eschscholzia parishii G. K. Helmkamp 1998-4-4 3160 Riverside Colorado Desert: 7.1 mi. N of Hwy I-10 on Eagle Mtn Rd, to the vicinity of the pumpins station 305 Comment
  UCR238374  Eucalyptus tereticornis George K. Helmkamp, E. A. Helmkamp 2012-2-3 18515 Stanislaus San Joaquin Valley, junction of Sonora Road and Milton Road, 17 km NE (50 deg. ) of Escalon 58 Comment
  SEINET4560812  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2011-1 18164 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 26.1 miles east of its junction with Mesquite Road in the city of Foresthill 2019 Comment
  UCR242344  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2010-8-20 16815 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring area 2232 Comment
  UCR133224  Euphorbia albomarginata George K. Helmkamp 1993-9-12 22- 04 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  UCR160346  Euphorbia albomarginata George K. Helmkamp 1993-9-22 35 9 San Bernardino San Bernardino Mtns., 14.4 mi up Burns Canyon from junction of Pioneertown and Pipes Canyon Roads 2073 Comment
  SD255715  Euphorbia nutans George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20036 Placer Sierra Nevada Mountains Foothills: city ofNorth Auburn, corner of Locksley Lane and CA-49 (Auburn 7.5'Q) 384 Comment
  UCR100354  Euphorbia polycarpa George K. Helmkamp 1997-9-30 2490 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR141349  Euphorbia polycarpa George K. Helmkamp, E. A. Helmkamp 1999-9-24 5285 San Bernardino Southern Mojave Desert., Morongo Road, 1.7 mi north of Two-Mile Road in Twentynine Palms 595 Comment
  IRVC29227  Euphorbia serpens G. K. Helmkamp, E. A. Helmkamp 2004-10-8 8844 San Luis Obispo Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek Central Coast 136 Comment
  UCR209013  Euphorbia serpillifolia George K. Helmkamp, E. A. Helmkamp 2009-8-19 15507 El Dorado Sierra Nevada Mountains, Wright's Lake Road, 8.6 miles north of its upper junction with Ice House Road 1785 Comment
  UCR179803  Euphorbia serpillifolia subsp. hirtula George K. Helmkamp, E. A. Helmkamp 2006-10-20 11539 El Dorado Northern Sierra Nevada Mountains Foothills, Bucks Bar Road, 3.9 miles south of Pleasant Valley Road, general vicinity of Somerset 625 Comment
  UCR201911  Euphorbia serpillifolia subsp. serpillifolia George K. Helmkamp, E. A. Helmkamp 2008-8-30 14049 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail 2.4 miles northwest of its junction with CA-88 2271 Comment
  RSA0045226  Euphorbia serpillifolia var. hirtula George K. Helmkamp, E. A. Helmkamp 2006-9-29 11455 El Dorado Salmon Falls Rd just west of Calif. Hwy 49 and 4 miles south of Cool. 351 Comment
  UCR14956  Euphorbia vallis-mortae George K. Helmkamp 1976-5-16 s.n. Inyo Owens Valley, Cottonwood Road [c. 10 miles south of Lone Pine], west of US 395 1372 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
  UCR218999  Euthamia occidentalis George K. Helmkamp, E. A. Helmkamp 2009-10-10 15673 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Patterson Dr. and CA-49 in Diamond Springs 520 Comment
  UCR257198  Festuca arundinacea George K. Helmkamp, Mary Alice Barnes 2013-5-13 20552 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
  SEINET3271564 Image available Festuca dertonensis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14387 Placer Sacramento Valley; Ranch House Road, 0.2 mile south of Sheridan 37 Comment
  UCR242952  Festuca dertonensis George K. Helmkamp, E. A. Helmkamp 2010-4-7 15828 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
  UCR100944  Festuca microstachys George K. Helmkamp, E. A. Helmkamp 1998-4-8 3194 Kern SW of Maricopa 1.7 mi NW of Calif. hwy 33 on Elkhorn Grade Rd. 396 Comment
  UCR158613  Festuca microstachys George K. Helmkamp, E. A. Helmkamp 2005-4-16 9346 Santa Barbara Outer South Coast Range, Sierra Madre Mountains, 1.1 mi south of Calif. Hwy 166 on Miranda Pines Road 526 Comment
  SEINET4691849  Festuca myuros George K. Helmkamp, E. A. Helmkamp 2012-1 18586 Sacramento Sacramento Valley/Delta: Twin Cities Road (Co. Rd. E-13), 0.1 mile NE of its junction with I-5. 5 Comment
  UCR158936  Festuca myuros George K. Helmkamp, E. A. Helmkamp 2005-4-17 9376 San Luis Obispo Central Coast, Corbett Canyon, 2.3 miles north of Calif. Hwy 227 in Arroyo Grande 81 Comment
  UCR170022  Festuca myuros George K. Helmkamp, E. A. Helmkamp 2005-2-18 8945 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
  UCR257036  Festuca myuros var. hirsuta George K. Helmkamp, Amy Barnes 2014-3-21 22614 Sutter Sacramento Valley, Along CA-20 (Colusa Hwy), 0.3 mile west of South Tarke Road, 3.75 miles east of Meridian 13 Comment
  UCR249953  Festuca perennis George K. Helmkamp, Elizabeth Helmkamp 2013-4-13 20311 Nevada Northern Sierra Nevada Mountains Foothills, Magnolia Road, 3.0 miles east of its junction with CA-49 495 Comment
  UCR250081  Festuca perennis George K. Helmkamp, Mary Alice Barnes 2013-5-3 20498 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
  UCR170436  Ficus carica George K. Helmkamp, Elizabeth Helmkamp 2005-10-29 10009 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento; c. 5 air mi NNE of Placerville], 5.1 [road] mi east of Calif. Highway 193 along Rock Creek Road 451 Comment
  CLARK-A1045-169  Filago arizonica George K. Helmkamp 1979-4-27 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  CLARK-A1045-227  Filago arizonica George K. Helmkamp 1978-4-1 Riverside Cabazon north of Interstate highway 10; disturbed soil; Cabazon 7.5'Q Comment
  SEINET4560893  Fragaria vesca George K. Helmkamp, E. A. Helmkamp 2011-1 17498 Nevada Northern Sierra Nevada Mountains Foothills: Tyler Foote Crossing Road, 1.6 miles north of its junction with Grizzly Hill Road, generally north of North Columbia. 930 Comment
  UCR258531  Fragaria vesca George K. Helmkamp, Mary Alice Barnes 2013-4-30 20432 El Dorado Northern Sierra Nevada Mountains, Capps Crossing/Bonnetti Road, 0.2 mile northwest of the bridge over Diamond /Camp Creek 1155 Comment
  UCD112776  Frangula californica subsp. tomentella G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12989 El Dorado northern Sierra Nevada Mountains; junction of Lost Creek Road and French Creek Road just north of Frenchtown. 366 Comment
  SEINET1906695  Frankenia salina G. K. Helmkamp, E. A> Helmkamp 2004-1 8694 Santa Barbara Central Coast: Ocean Park at Surf, NW of Lompoc. 6 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
  SEINET4560804  Fraxinus latifolia George K. Helmkamp, E. A. Helmkamp 2011-1 17760 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 degrees) of Peardale 686 Comment
  RSA628848  Fremontodendron mexicanum George K. Helmkamp, E. A. Helmkamp 1999-4-16 4670 San Diego Cottonwood Creek Watershed; N of Barret Lake. Lyons Valley Rd 1.9 mi S of Japatul Valley Rd and ca 6 mi airline SSW of junction of CA-79 and I-8 716 Comment
  UCR79310  Galium angustifolium George K. Helmkamp 1993-9-12 22- 07 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  UCR173290  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10518 El Dorado Northern Sierra Nevada Foothills, NE of Georgetown; along Bottlehill Road, 1.4 mi. N of Wentworth Springs Road 1006 Comment
  UCR173777  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10145 Sutter Sutter Buttes, N end of Great Valley, 5.6 miles WNW of Sutter along Pass Road on the S end of Sutter Buttes 69 Comment
  UCR61706  Galium aparine George K. Helmkamp 1990-4-17 s.n. San Luis Obispo Avila Beach [near Sycamore Springs], San Luis Bay Drive and Avila Beach Drive 15 Comment
  SD235015  Galium bolanderi G. K. Helmkamp, E. A. Helmkamp 2006-8-11 11214 Placer Northern Sierra Nevada Mtns foothills: along Forest Hill Rd., 8.7 miles northeast of Forest Hill. 1310 Comment
  SEINET4560817  Galium bolanderi George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2010-1 19808 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
  UCD121613  Galium bolanderi G. K. Helmkamp; E. A. Helmkamp 2006-8-11 11214 Placer Northern Sierra Nevada Mtns foothills: along Forest Hill Rd., 8.7 miles northeast of Forest Hill. 1311 Comment
  UCR170244  Galium bolanderi George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9902 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
  UCR206857  Galium bolanderi George K. Helmkamp, E. A. Helmkamp 2009-7-16 15200 Placer Sierra Nevada Mountains, Foresthill Road, 20.3 miles northeast of the city of Foresthill 1704 Comment
  UCR219025  Galium bolanderi George K. Helmkamp, E. A. Helmkamp 2010-6-23 16351 Amador Sierra Nevada Mountains Foothills, Sutter Creek Road, 9.5 miles northeast of its junction with old CA-49 in Sutter Creek village 576 Comment
  UCR233464  Galium bolanderi George K. Helmkamp, E. A. Helmkamp 2011-9-1 18205 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles south of its junction with US-50 in Kyburz 1447 Comment
  UCR249615  Galium bolanderi George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20840 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim's Road, 0.1 mile northwest of its junction with Spring Garden Road 738 Comment
  UCR61708  Galium nuttallii George K. Helmkamp 1990-4-19 s.n. San Luis Obispo West Cuesta Ridge, 3 miles NW of US 101, north of San Luis Obispo 671 Comment
  SEINET270109  Galium parishii G. Helmkamp 1993-9-22 38 -11 San Bernardino Dry meadow and rocky meadow edge at junction of Burns Canyon and Round Valley Roads 2195 Comment
  CDA36253  Galium parisiense G. K. Helmkamp, E. A. Helmkamp 2007-4-23 11801 Amador Foothills, Northern Sierra Nevada Mountains; Junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione. Comment
  UCR206567  Galium parisiense George K. Helmkamp, E. A. Helmkamp 2009-6-13 14990 Shasta Southern Cascade Range, Wilson Hill Road, 0.7 mile south of its junction with CA-44 in Shingletown 1088 Comment
  UCR257585  Galium porrigens George K. Helmkamp, Elizabeth Helmkamp 2014-2-22 22529 Nevada Sierra Nevada Mountains Foothills, Garden Bar Road, 2.8 road miles west of Wolf Road at Wolf, 3.9 air miles WNW (287 deg. ) of Higgins Corner 387 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
  UCR237042  Galium porrigens var. porrigens George K. Helmkamp, E. A. Helmkamp 2012-4-21 18815 Nevada Northern Sierra Nevada Mountains Foothills, junction of Lime Kiln Road and Amberley Lane, 14.5 mi. NNW (345 deg. ) of Auburn 414 Comment
  UCR206341  Galium sparsiflorum subsp. glabrius George K. Helmkamp, E. A. Helmkamp 2009-6-14 15027 Shasta Southern Cascade Range, Water Leaf Lane (apparently very new, short spur), 0.2 mile south of CA-44 junction 1.2 miles west of Shingletown 992 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
  CAS-BOT-BC444022  Galium triflorum George K. Helmkamp; Elizabeth Helmkamp 2013-7-6 20977 Amador Northern Sierra Nevada Mountains: Bear River Road at the south end of the dam for Lower Bear River Reservoir. 543 Comment
  UCD132410  Gamochaeta G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11227 Nevada Northern Sierra Nevada Mountains: just south of I-80 on Lake Valley Rd. 1755 Comment
  CLARK-A1045-710  Gaura coccinea George K. Helmkamp 1978-5-6 San Bernardino Mojave Desert Clark Mt 15'Q Comment
  UCR241748  Gayophytum George K. Helmkamp, E. A. Helmkamp 2012-9-25 19926 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 1.2 miles north of CA-20, N of I-80 between Grass Valley and Truckee 1427 Comment
  UCD103657  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-8-4 12686 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
  UCD103679  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-9-11 12925 El Dorado Northern Sierra Nevada Mountains: Along Hwy. US-50, 0.4 mile southwest of Phillips. 1829 Comment
  UCR115824  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2000-7-18 5860 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
  UCR123373  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6880 Plumas Sierra Nevada Mountains, Calif. Hwy 36, 4.3 mi SW of its junction with Calif. Hwy 89, vicinity of Lake Almanor 1463 Comment
  UCR188560  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2007-9-26 13015 El Dorado Northern Sierra Nevada Mountains Foothills, Bonetti Road, 1.1 miles south of its junction with Mormon Emigrant Trail, just east of Jenkinson Lake 1189 Comment
  UCR190708  Gayophytum diffusum subsp. parviflorum George K. Helmkamp 2007-6-29 12433 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  UCR206078  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13907 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50 2043 Comment
  UCR215919  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2009-6-29 15071 El Dorado Sierra Nevada Mountains, Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74 deg. ) of Pollock Pines 1642 Comment
  UCR249574  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Elizabeth 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
  UCR176356  Gayophytum heterozygum George K. Helmkamp, E. A. Helmkamp 2006-7-7 10870 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  SD237537  Gayophytum humile G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15271 El Dorado Sierra Nevada Mountains: Wright Lake Road, 1.2 miles south of Wrights Lake (Pyramid Peak 7.5'Q) 2073 Comment
  UCR13904  Gayophytum racemosum George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at Benton Crossing, just north of Crowley Lake 2134 Comment
  CDA4094  Genista monspessulana G. K. Helmkamp, E. A. Helmkamp 1998-5-19 3885 San Luis Obispo Santa Lucia Range. Southwest of Paso Robles along CA-46 at York Mountain Rd. Comment
  UCR219185  Genista monspessulana George K. Helmkamp, E. A. Helmkamp 2010-6-23 16367 Amador Sierra Nevada Mountains Foothills, Rams Horn Grade, 1.8 rd. miles northeast of Volcano at the junction with Sutter Creek Road 730 Comment
  CLARK-A1045-1151  Gentiana simplex George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  CDA36219  Geranium dissectum G. K. Helmkamp, E. A. Helmkamp 2009-5-29 14870 El Dorado Sierra Nevada Mountains Foothills; Lake Oaks Mobile Home Park, Diamond Springs. Comment
  RSA0028472  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-6-2 17430 Nevada Along CA-20, 3.3 miles west of its junction with CA-49 in Grass Valley 627 Comment
  RSA789881  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2012-4-17 18776 Yolo Along County Road 26, 1.4 miles west of its intersection with Road 89, c. 12 miles WSW of Woodland 65 Comment
  SBBG61312  Geranium dissectum G. K. Helmkamp with E. A. Helmkamp 2011-4-1 17117 Colusa Maxwell Rd, 2.1 mi E of Maxwell, near Delevan Wildlife Refuge 23 Comment
  SD239775  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2012-4-14 18739 Butte Northern Sacramento Valley: Middle Noncut Road, 1.5 miles east of CA-70, ESE of Gridley. 17 Comment
  SEINET3860286  Geranium dissectum George K. Helmkamp, Amy Barnes 2010-5-7 15975 Calaveras Sierra Nevada Mountains Foothills: along CA-49, 0.4 mile north of its junction with CA-12, vicinity of San Andreas.; 0 233 Comment
  SEINET4178557 Image available Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17612 Amador Northern Sierra Nevada Mountains Foothills: junction of Pine Grove to Volcano Road and Aqueduct Road, 0.76 mi. ENE of Pine Grove. 777 Comment
  UCR121492  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 1999-6-28 4956 San Mateo Coast Range; Santa Cruz Mtns, Sky Londa; junction of Calif. Hwy 84 and Calif. Hwy 35, 5 mi south of central Redwood City 457 Comment
  UCR208548  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2009-5-11 14676 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
  UCR238406  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2012-4-7 18720 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
  OBI82254  Geranium dissectum George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22164 Amador Along Ca-49, just northeast of its junction with Randolph Court, c. 1 km S of Plymouth. Open field with a wet depression. 7.5' Q Comment
  CAS-BOT-BC183855  Geranium molle G. K. Helmkamp; E. A. Helmkamp 2005-3-25 9207 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
  RSA755432  Geranium molle George K. Helmkamp, E. A. Helmkamp 2009-4-21 14518 El Dorado junction of Rock Creek Road and CA-193, north of Chili Bar and the South Fork of the American River 390 Comment
  RSA782386  Geranium molle George K. Helmkamp, E. A. Helmkamp 2010-4-23 15905 Placer along Salmon Falls Road, at Miners Valley Rd., 4.5 miles south of junction with CA-49 at Pilot Hill. 287 Comment
  UCD103419  Geranium molle G. K. Helmkamp; Elizabeth Helmkamp 2006-4-25 10214 El Dorado Northern Sierra Nevada Foothills: E of Sacramento, SW of Placerville. Forni road between US Highway 50 and Diamond Springs, at Weber Creek. 488 Comment
  UCR184956  Geranium molle George K. Helmkamp, E. A. Helmkamp 2007-4-26 11854 Calaveras Northern Sierra Nevada Mountains Foothills, Mokelumne Vista, 0.4 mile south of Calif. Hwy 49 and Mokelumne Hill 442 Comment
  UCR234203  Geranium molle George K. Helmkamp, E. A. Helmkamp 2011-4-12 17176 El Dorado Foothillls Northern Sierra Nevada Mountains, Placerville, along Forni Road, 0.2 mile northwest of its Weber Creek crossing, SE of Hwy 50 near Diamond Springs 488 Comment
  UCR237044  Geranium molle George K. Helmkamp, E. A. Helmkamp 2012-4-21 18813 A Nevada Northern Sierra Nevada Mountains Foothills, junction of Lime Kiln Road and Amberley Lane, 14.5 mi. NNW (345 deg. ) of Auburn 414 Comment
  RSA747029  Geranium pusillum George K. Helmkamp, E. A. Helmkamp 2007-4-26 11845 Calaveras Chili Gulch near McSorley Ranch, along Calif. Hwy 49, 5.1 miles south of the Amador County line 370 Comment
  UCR188831  Geranium pusillum George K. Helmkamp, E. A. Helmkamp 2007-3-23 11698 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
  UCR189197  Geranium richardsonii George K. Helmkamp 2007-7-7 12481 Alpine Northern Sierra Nevada Mountains, along CA-89, 1.3 miles north of its junction with CA-88 2262 Comment
  UCR103827  Geum macrophyllum var. perincisum George K. Helmkamp, E. A. Helmkamp 1997-9-10 2340 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
  UCR176388  Gilia George K. Helmkamp, E. A. Helmkamp 2006-7-7 10875 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  SEINET3860395  Gilia achilleifolia subsp. achilleifolia George K. Helmkamp, E. A. Helmkamp 2010-6-4 16230 Sonoma North Coast Ranges: Mark West Springs Raod, 6.4 rd. miles east of its junction with US-101, 5.9 air mi. east of Windsor.; 0 155 Comment
  UCR129960  Gilia achilleifolia subsp. multicaulis George K. Helmkamp, E. A. Helmkamp 2000-4-24 5544 Monterey Outer south coast ranges., Nacimiento Road, 10.4 mi west of Mission Road, just south of Mission San Antonio 457 Comment
  UCR121703  Gilia brecciarum subsp. brecciarum George K. Helmkamp, E. A. Helmkamp 2001-4-26 6478 Kern Tehachapi Mtns, Tehachapi Willow Springs Rd at Oak Creek Pass. 1463 Comment
  UCR129537  Gilia brecciarum subsp. neglecta George K. Helmkamp, E. A. Helmkamp 1998-5-21 4038 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  SD148097  Gilia cana subsp. speciosa G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6514 Kern Tehachapi Mountains; Hart Flat turnoff from CA-58. 883 Comment
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Dec 21 2016
  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
  CLARK-A1045-54  Gilia cana subsp. triceps George K. Helmkamp 1977-4-24 Inyo Panamint Mountains north of Townes Pass; dry slope north of Pass; ; Panamint Butte, 7.5' 1219 Comment
  RSA781219  Gilia capillaris George K. Helmkamp, E. A. Helmkamp 2010-7-23 16601 El Dorado trailhead at the east end of Wright's Lake, 1.2 miles north of the visitor's center at the lake entrance 2127 Comment
  RSA785622  Gilia capitata subsp. mediomontana George K. Helmkamp, Mary Alice Barnes, Mary Jane Ganibe 2010-7-6 16449 El Dorado Silver Fork Road, 1.9 miles south of its junction with US-50 in Kyburz. 1473 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
  UCR249572  Gilia capitata subsp. mediomontana George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20864 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  RSA0012161  Gilia capitata subsp. pedemontana George K. Helmkamp, E. A. Helmkamp 2011-7-17 17764 Nevada You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg.) of Peardale 686 Comment
  RSA0012222  Gilia capitata subsp. pedemontana George K. Helmkamp, E. A. Helmkamp 2011-5-10 17247 Amador along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg.) of town of Sutter Creek 412 Comment
  UCR161691  Gilia clivorum George K. Helmkamp, E. A. Helmkamp 2005-2-24 8959 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
  CLARK-A1045-464  Gilia diegensis George K. Helmkamp 1979-6-5 #2 San Bernardino San Bernardino Mountains along Forest Service road 3N08 at junction with 3N66Y; dry flat; yellow pine forest; Big Bear City 7.5'Q Comment
  UCR176015  Gilia leptalea George K. Helmkamp, E. A. Helmkamp 2006-7-28 11032 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  RSA781218  Gilia leptalea subsp. bicolor George K. Helmkamp, E. A. Helmkamp 2010-7-23 16589 El Dorado trailhead at the east end of Wright's Lake, 1.2 miles north of the visitor's center at the lake entrance 2127 Comment
  SEINET11265980  Gilia leptalea subsp. bicolor George Helmkamp, E. A. Helmkamp 2010-8-20 16813 El Dorado Northern Sierra Nevada Mountains: Foster Meadow Road 0.6 miles west of Mormon Emigrant Trail in the Leek Spring area (Tragedy Spring 7.5' Q.); 0 2232 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
  SD143739  Gilia malior G. K. Helmkamp, E. A. Helmkamp 1998-4-9 3286 Kern West end of city of Mojave, along Airport Blvd. 808 Comment
  CLARK-A1045-1040  Gilia micromeria George K. Helmkamp 1977-7-3 Mono Long Valley US Highway 395; June Lake 7.5'Q Comment
  UCR104043  Gilia modocensis George K. Helmkamp, E. A. Helmkamp 1998-3-16 2816 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
  UCR102956  Gilia scopulorum George K. Helmkamp 1997-3-2 1310 San Bernardino Mojave Desert, Town of Morongo Valley, near Vista & Pinyon. 808 Comment
  UCR29823  Gilia scopulorum George K. Helmkamp 1983-3-24 383- 16 Riverside Sonoran (Colorado) Desert, north base of the Little Chuckwalla Mountains, 1.5 miles east of Graham Pass Road 336 Comment
  CLARK-A1045-1286  Gilia stellata George K. Helmkamp 1978-3-16 San Diego Anza-Borrego Desert State Park Bisnaga Alta Wash; Sweeney Pass 7.5'Q Comment
  RSA752650  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2008-4-11 13262 Calaveras along Fricot City Road, 1.3 miles east of its junction with Calaveritas road 424 Comment
  RSA789510  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2010-4-7 15835 San Joaquin along CA-88, 1.1 miles southwest of the Amador County line, 6 miles NE (33 deg.) of Clements 79 Comment
  SD241129  Gilia tricolor subsp. tricolor George K. Helmkamp, E. A. Helmkamp 2010-4-7 15835 San Joaquin Northeast San Joaquin Valley: along CA-88, 1.1 miles southwest of the Amador County line, 6 miles NE (33a^z) of Clements (Goose Creek 7.5'Q) 78 Comment
  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
  UCR258120  Glyceria elata George K. Helmkamp, Amy Barnes 2014-8-11 23008 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 Comment
  UCR163023  Gnaphalium californicum George K. Helmkamp, E. A. Helmkamp 2005-4-6 9312 Santa Barbara Outer South Coast Ranges, Old Highway US 101, road to Nojoqui Falls, 0.2 mi south of junction with US Highway 101 204 Comment
  UCR91820  Gnaphalium californicum George K. Helmkamp 1996-5-24 1030 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  UCR170322  Gnaphalium canescens subsp. beneolens George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10036 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, N of Union Valley Reservoir]; Wentworth Springs Road, 5.9 [road] mi east of Uncle Toms Cabin 1567 Comment
  UCR245583  Gnaphalium canescens subsp. beneolens George K. Helmkamp, Amy Barnes 2013-9-24 22382 Tuolumne Northern Sierra Nevada Mountains, Boards Crossing of the North Fork of the Stanislaus River 1244 Comment
  UCR253144  Gnaphalium canescens subsp. beneolens George K. Helmkamp, E. A. Helmkamp 2013-11-27 22492 El Dorado Sierra Nevada Mountains Foothills, Capp's Crossing Road, 0.4 mile southeast of its junction with Mormon Emigrant Trail 1204 Comment
  RSA757090  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2009-7-16 15199 Placer Foresthill Road, 20.3 miles northeast of the city of Foresthill. 1704 Comment
  UCR132285  Gnaphalium luteoalbum George K. Helmkamp 2003-8-31 8113 Santa Barbara Central Coast, Casmalia Hills, 4 mi west of Calif. Hwy 1 (south of Guadalupe) along Brown Road 183 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
  SD197685  Gnaphalium palustre G. K. Helmkamp, E. A. Helmkamp 2008-8-1 13943 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road at Lyons Creek, 4.0 miles north of CA-50. 2043 Comment
  UCR229464  Gnaphalium palustre George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18035 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 5.0 miles [northeast] of Boards Crossing of the North Fork Stanislaus River 1716 Comment
  UCR188520  Grindelia camporum var. camporum George K. Helmkamp, E. A. Helmkamp 2007-9-24 13001 Calaveras Foothills, northern Sierra Nevada Mountains, along Hwy CA-49, 0.5 mile west (northbound route) of Mokelumne Hill 396 Comment
  CAS-BOT-BC518710  Grindelia hirsutula George K. Helmkamp; Amy Barnes 2014-8-27 23027 Alpine Northern Sierra Nevada Mountains: West Fork Carson River canyon, along Hwy CA-88-Carson Pass Hwy, 2.6 mi E of jct with Hwy 89/Luther Pass Rd 1994 Comment
  UCR91703  Grindelia hirsutula George K. Helmkamp 1996-5-24 1019 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  RSA779439  Grindelia nana George K. Helmkamp, E. A. Helmkamp 2010-6-23 16364 Amador Rams Horn Grade, 1.8 rd. miles northeast of Volcano at the junction with Sutter Creek Road 730 Comment
  UCR106432  Grindelia stricta var. stricta George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2190 Mendocino North Coast, Big River, 0.2 mi east of US-1, south of Mendocino 6 Comment
  UCR137744  Gutierrezia sarothrae George K. Helmkamp, E. A. Helmkamp 1999-9-30 5298 San Bernardino San Bernardino Mountains, 5.7 miles up Burns Cyn Rd from Rimrock Rd., NW of Pioneertown 1768 Comment
  UCR194719  Gypsophila elegans George K. Helmkamp, E. A. Helmkamp 2007-10-13 13084 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR79659  Gypsophila elegans George K. Helmkamp 1993-7-10 X- 03 San Bernardino Mojave Desert, Morongo Valley at 49038 Vista Dr. [E of Pinon, north of Tamarisk] 823 Comment
  RSA791759  Hackelia velutina George K. Helmkamp, E. Helmkamp 2006-7-7 10814 El Dorado Northern Sierra Nevada Mountains.: Wright s Lake Road, 3.2 miles north of Highway US-50, northeast of Kyburz 1982 Comment
  UCR229462  Hackelia velutina George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18055 Calaveras Northern Sierra Nevada Mountains, Black Springs Road [Forest Route 7N23], 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  CLARK-A1045-1129  Haplopappus bloomeri George K. Helmkamp 1977-9-1 III Alpine Sierra Nevada roadside in sagebrush scrub area at the Pass; ; Topaz Lake 7.5'Q 2529 Comment
  UCR159319  Helenium puberulum George K. Helmkamp, E. A. Helmkamp 2004-7-14 8771 Santa Barbara Southern Central Coast, Surf, NW of Lompoc 46 Comment
  UCR257055  Helenium puberulum George K. Helmkamp, E. A. Helmkamp 2013-11-9 22482 Calaveras Sierra Nevada Mountains Foothills, Gwin Mine Road, 0.1 mile south of the Middle Bar Bridge over North Fork Mokelumne River 183 Comment
  UCR207103  Helianthella californica var. nevadensis George K. Helmkamp, E. A. Helmkamp 2009-7-16 15223 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
  SEINET1004419  Helianthus annuus George K. Helmkamp 2004-1 8290 San Luis Obispo Central Coast: Nipomo Mesa, Pomeroy Rd., 1.1 mi N of Willow rd. 130 Comment
  UCR194982  Helianthus annuus George K. Helmkamp, E. A. Helmkamp 2007-10-13 13093 San Joaquin Northern San Joaquin Valley, along Hwy CA-88, 1.0 mile southwest of Clements at Disch Road 37 Comment
  UCR242842  Helianthus annuus George K. Helmkamp, E. A. Helmkamp 2010-4-14 15871 Solano Northern San Joaquin Valley, Pitt School Road, 3.8 miles south of its junction with I-80 and south of Dixon 21 Comment
  SD197694  Helminthotheca echioides G. K. Helmkamp, E. A. Helmkamp 2008-10-30 14289 Sacramento Southern Sacramento Valley: along Highway E13 (Twin Cities Road) 4.4 miles west of its junction with CA-99. 4 Comment
  RSA749733  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2008-10-6 14223 Sutter Pass Road on the south side of Sutter Buttes, 6.9 miles west of Sutter 84 Comment
  UCR179793  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2006-10-6 11475 Amador Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49, 1.1 miles south of Plymouth 314 Comment
  IRVC28932  Hemizonia increscens subsp. increscens G. K. Helmkamp 2003-10-24 8215 San Luis Obispo El Campo Rd 0.1 mi E of Los Berros Rd, SE of Arroyo Grande Central Coast 46 Comment
  UCR262437  Hemizonia parryi subsp. parryi George K. Helmkamp, E. A. Helmkamp 2011-12-7 18499 Yolo Southern Sacramento Valley, midway between Davis and Sacramento along Hwy 80, between Chiles Road (County Road 32B) and Levee Road, west edge of Yolo Bypass Wildlife Area 11 Comment
  RSA667356  Hemizonia pungens subsp. pungens George K. Helmkamp, E. A. Helmkamp 2001-4-27 6535 Kern Central CA Valley: Enos Lane Rd., 1.9 mi S of CA-119 (NE of Taft). 61 Comment
  UCR123931  Hemizonia pungens subsp. pungens George K. Helmkamp, E. A. Helmkamp 2001-4-27 6535 Kern San Joaquin Valley, Enos Lane Rd., 1.9 mi south of Calif. Hwy 119, NE of Taft 61 Comment
  UCR190565  Heracleum maximum George K. Helmkamp 2007-6-29 12439 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  UCR100852  Hesperocallis undulata George K. Helmkamp, E. A. Helmkamp 1998-3-18 2876 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
  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
  CLARK-A1045-1309  Heterocodon rariflorum George K. Helmkamp 1979-6-6 Riverside Wolf Valley Highway S16 south of Murrieta (road to Pala), mile 5; Pechanga 7.5'Q Comment
  SD239895  Heteromeles arbutifolia George K. Helmkamp, E. A. Helmkamp 2008-6-5 13605 El Dorado Sierra Nevada Mountains Foothills: Forbay Road, 0.5 mile north of its crossing of the South Fork American River (Slate Mountain 7.5'Q) 668 Comment
  UCR218219  Heteromeles arbutifolia George K. Helmkamp, E. A. Helmkamp 2010-6-26 16418 Placer Sierra Nevada Mountains Foothills, along CA-49 in the section dropping rapidly to the American River forks; about 1/2 mile east of Auburn 355 Comment
  SEINET11261446  Heterotheca grandiflora George Helmkamp, E. A. Helmkamp 2011-11-20 18469 El Dorado Northern Sierra Nevada Mountains Foothills: Salmon Falls Road, 1.9 miles northeast of the bridge over the American River.; 0 192 Comment
  UCR200936  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2008-9-30 14183 Calaveras Foothills, northern Sierra Nevada Mountains, along CA-49, 1.9 miles south of Mokelumne Hill 381 Comment
  UCR171398  Heterotheca oregona George K. Helmkamp, E. A. Helmkamp 2005-9-30 9969 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
  UCR188244  Heuchera George K. Helmkamp, E. A. Helmkamp 2007-4-27 11859 A El Dorado Foothills, Northern Sierra Nevada Mountains, Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House 1027 Comment
  UCR229398  Heuchera micrantha George K. Helmkamp, E. A. Helmkamp 2011-7-30 17937 El Dorado Northern Sierra Nevada Mountains, North-South Road, 5.5 miles north of its junction with Omo Ranch Road, east side of bridge over Pi Pi Creek 1209 Comment
  UCR122216  Hieracium albiflorum George K. Helmkamp, E. A. Helmkamp 2000-6-18 5807 Mendocino North Coast Range, 9.2 mi east of CA Hwy 1 on CA Hwy 20, southeast of Fort Bragg 305 Comment
  UCR206726  Hieracium albiflorum George K. Helmkamp, E. A. Helmkamp 2009-7-16 15202 Placer Sierra Nevada Mountains, Foresthill Road, 20.3 miles northeast of the city of Foresthill 1704 Comment
  UCR59848  Hilaria rigida 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
  UCR249628  Holcus lanatus George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20859 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 mile south of its junction with US-50 in Kyburz 1364 Comment
  SEINET11261873  Holocarpha virgata George Helmkamp, E. A. Helmkamp 2011-11-19 18460 Sacramento Eastern Sacramento Valley: White Rock Coad, .2 mile west of its junction with Placerville Road, 5.5 mi SE (1301/4) of Folsom (Clarkesville 7.5' Q.).; 0 127 Comment
  JEPS119430  Holocarpha virgata subsp. virgata G. K. Helmkamp, E. A. Helmkamp 2011-11-19 18460 Sacramento Eastern Sacramento Valley, White Rock Road, 0.2 mile west of its junction with Placerville Road, 5.5 mi. SE (130 deg. ) of Folsom Comment
  SEINET2441343  Holocarpha virgata subsp. virgata George 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 (Amador City 7.5' Q.). 314 Comment
  UCR248383  Holocarpha virgata subsp. virgata George K. Helmkamp, Elizabeth Helmkamp 2013-9-13 22296 Amador Northern Sierra Nevada Mountains Foothills, Fiddletown Road, 1.4 miles southeast of Fiddletown 588 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
  UCR196957  Holodiscus microphyllus George K. Helmkamp, E. A. Helmkamp 2008-7-16 13834 Alpine Northern Sierra Nevada Mountains, along CA-88, 0.8 mile northeast of Carson Pass 2534 Comment
  UCR91689  Hordeum brachyantherum George K. Helmkamp 1996-5-24 1037 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  UCR248709  Hordeum brachyantherum subsp. brachyantherum George K. Helmkamp, Belinda Pesheck 2013-7-14 21047 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
  SD257137  Hordeum murinum subsp. glaucum George K. Helmkamp, Amy Barnes 2014-3-21 22597 Sutter Sacremento Valley: along CA-20 (Colusa Hwy), 1.3 miles west of its junction with Acacia Ave., 1.7 air miles SW of Sutter (Sutter 7.5'Q) 13 Comment
  SEINET9259650 Image available Hordeum murinum subsp. leporinum George K. Helmkamp, Amy Barnes 2014-1 22723 Sacramento Sacramento Valley: Clay East Road, 1 mile east of its junction with CA-104 (Clay 7.5' Q) 52 Comment
  UCR187065  Hordeum murinum subsp. leporinum George K. Helmkamp, E. A. Helmkamp 2007-5-5 11936 El Dorado Foothills, Northern Sierra Nevada Mountains, along CA-49, 3.7 miles northwest of Placerville 549 Comment
  UCR15507  Horkelia George K. Helmkamp 1978-6-3 s.n. San Luis Obispo Central Coast, Montana de Oro State Park Comment
  UCR15413  Horkelia fusca George K. Helmkamp 1977-7-3 s.n. Mono Sierra Nevada Mtns, just SE of Saddlebag Lake 3354 Comment
  SEINET4691398  Horkelia fusca subsp. parviflora George K. Helmkamp, E. A. Helmkamp 2011-1 18096 Alpine Northern Sierra Nevada Mountains: Blue Lakes Road, 6.6 miles south of its junction with CA-88. 2296 Comment
  UCR206994  Horkelia fusca subsp. parviflora George K. Helmkamp, Amy Barnes 2009-7-8 15162 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
  UCR234608  Horkelia fusca subsp. parviflora George K. Helmkamp, E. A. Helmkamp 2011-8-19 18096 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 6.6 miles south of its junction with CA-88 2296 Comment
  UCD113477  Horkelia fusca var. parviflora G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10949 El Dorado Northern Sierra Nevada Mtns: Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges. 1960 Comment
  UCD113486  Horkelia fusca var. parviflora G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12715 El Dorado Northern Sierra Nevada Mtns: Wright's Lake; south side of the lake at the entrance to the campground. 2131 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
  UCR237009  Horkelia tridentata subsp. tridentata George K. Helmkamp, E. A. Helmkamp 2012-5-28 19076 El Dorado Northern Sierra Nevada Mountains, 1.1 miles east of the E dam of Jenkinson Lake via Mormon Emigrant Trail, then 0.6 mile SE toward Fleming Meadow (?) on an unnamed road off Bonetti Rd. 1169 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
  SD239737  Hosackia oblongifolia George K. Helmkamp, E. A. Helmkamp 2010-9-4 16922 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) 1620 Comment
  SEINET269246  Hydrophyllum occidentale G. Helmkamp, E. Helmkamp 1995-6-23 95- 8 -6 Alpine Monito Pass along CA-89. 2530 Comment
  UCR177866  Hypericum anagalloides George K. Helmkamp, E. A. Helmkamp 2006-7-31 11077 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
  UCR218626  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2010-6-9 16259 El Dorado Sierra Nevada Mountains Foothills, Mother Lode Dr., 0.2 mile northeast of its junction with Pleasant Valley Road, 1.1 air mi. WNW (276 deg. ) of El Dorado 474 Comment
  UCR233098  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2011-7-17 17744 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
  UCD110375  Hypericum perforatum subsp. perforatum G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-14 10709 Placer Northern Sierra Nevada foothills: 0.2 mile north of Forest Hill Road on unnamed road to Lake Clementine (general area northeast of Auburn on Forest Hill Divide). 488 Comment
  RSA0035674  Hypochaeris glabra George K. Helmkamp, Mary Alice Barnes 2013-5-3 20464 Placer SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road 974 Comment
  UCD133334  Hypochaeris glabra G. K. Helmkamp 2004-4-21 8490 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR140076  Hypochaeris glabra George K. Helmkamp 2004-4-1 8412 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
  RSA795043  Hypochaeris radicata George K. Helmkamp, E. A. Helmkamp 2011-7-17 17755 Nevada You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg ) of Peardale 686 Comment
  UCR173652  Hypochaeris radicata George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10156 Amador Northern Sierra Nevada Foothills, ESE of Sacramento; 1.0 mi south of Plymouth along Calif. Hwy 49 326 Comment
  UCR206910  Hypochaeris radicata George K. Helmkamp, E. A. Helmkamp 2009-5-28 14817 Nevada Sierra Nevada Mountains Foothills, along CA-49, 2.0 miles north of its junction with CA-20, north of Nevada City 780 Comment
  RSA614499  Hyptis emoryi George K. Helmkamp 1998-2-5 2649 Riverside Palm Springs, 1.1 mi. W of CA Hwy 111 on Tramway Rd. 335 Comment
  UCR163649  Hyptis emoryi George K. Helmkamp, E. A. Helmkamp 1998-1-24 2608 Imperial Sonoran (Colorado) Desert, Ogilby Rd, 14.2 mi. south of the junction with Calif. Hwy 78, vicinity of Tumco Wash 183 Comment
  UCR248484  Iris hartwegii subsp. hartwegii George K. Helmkamp, E. A. Helmkamp 2012-5-31 19085 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26, 2.2 km NE (63 deg. ) of Glencoe, 0.8 mile west of the crossing over the South Fork Mokelumne River 741 Comment
  UCR256480  Iris hartwegii subsp. hartwegii George K. Helmkamp, Amy Barnes 2014-5-8 22843 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
  UCD138735  Iris hartwegii subsp. pinetorum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-20 10507 El Dorado Northern Sierra Nevada: ca. 5 air mi off CA Hwy 193, E of Georgetown; 1.7 mi. N of Wentworth Springs Road on Bottlehill Road (junction just E of Balderson Station). 973 Comment
  UCR173713  Iris hartwegii subsp. pinetorum George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10507 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
  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
  HSC79165  Isocoma acradenia G. K. Helmkamp 1983-10-8 - 11 San Bernardino Big Morongo Preserve of The Nature Conservancy, Morongo Valley, near the house in the San Bernardino Co. owned area. 762 Comment
  OBI43758  Isocoma acradenia var. acradenia G. K. Helmkamp 1986-9-28 s.n. Inyo N edge of Tecop Hot Springs beside Hwy 127 427 Comment
  UCR103292  Isomeris arborea George K. Helmkamp, E. A. Helmkamp 1998-2-5 2667 Riverside Little San Bernardino Mtns., 3.2 mi. north of junction of Thousand Palms Canyon Road and Dillon Road. 457 Comment
  SD132254  Iva axillaris G. Helmkamp 1990-9-23 H 1 Modoc U. S. Highway 395, 13 miles north of Likely. 1340 Comment
  UCR100352  Iva nevadensis George K. Helmkamp 1997-9-30 2491 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UC2015649  Ivesia kingii var. kingii G. K. Helmkamp 1996-10-17 1261 Mono Ecological Preserve at the east end of River Springs Rd at edge of River Springs Lakes. Comment
  CLARK-A1045-1029  Ivesia lycopodioides George K. Helmkamp 1977-7-3 Mono Sierra Nevada flat, dry rocky area on the road to the Lake; ; Mount Dana 7.5'Q 3047 Comment
  UC1787279  Ivesia lycopodioides subsp. megalopetala G. K. Helmkamp 2000-7-19 5929 Inyo Eastern High Sierra Nevada Mountains: Mosquito Flat, 0.9 mi S of Rock Creek Lake. 3112 Comment
  UCR123401  Ivesia lycopodioides subsp. megalopetala George K. Helmkamp, E. A. Helmkamp 1998-8-12 4370 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR219138  Juglans californica var. hindsii George K. Helmkamp, E. A. Helmkamp 2009-9-17 15632 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
  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
  UCR173691  Juncus balticus George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10321 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  OBI41020  Juncus balticus G. Helmkamp 1985-4-18 353 San Bernardino Morongo Cyn. SE of Morongo Valley. Beside the entrance rd 762 Comment
  CLARK-A1045-449  Juncus bufonius George K. Helmkamp 1979-6-20 San Bernardino San Bernardino Mountains 3 miles from dump above Baldwin Lake; stream bed; Big Bear City 7.5' Q Comment
  HSC79050  Juncus bufonius G. K. Helmkamp 1984-4-29 - 17 San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside County line, 2 mi. below the Big Morongo Preserve headquarters and 1/4 mi. up a broad side canyon to the E 701 Comment
  UCR159839  Juncus bufonius George K. Helmkamp, E. A. Helmkamp 2005-6-12 9632 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR173680  Juncus bufonius George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10318 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  SEINET271518  Juncus bufonius G. Helmkamp 1994-5-18 91 -1 San Luis Obispo Alamo Cyn 7 mi E of US-101 on CA-166m then 4 mi N (generally NE of Twitchell Reservoir). 213 Comment
  UCR222350  Juncus bufonius var. bufonius George K. Helmkamp, E. A. Helmkamp 2010-6-4 16234 Sonoma North Coast Ranges, Mark West Springs Road (Porter Creek Rd.), 9.8 rd. miles east of its junction with US-101, 4.5 air miles SW (250 deg. ) of Calistoga 280 Comment
  UCR233336  Juncus confusus George K. Helmkamp, E. A. Helmkamp 2011-9-1 18230 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR237736  Juncus drummondii George K. Helmkamp, E. A. Helmkamp 2012-7-14 19383 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
  UCD141507  Juncus effusus subsp. pacificus G. K. Helmkamp; E. A. Helmkamp 2005-9-23 9908 El Dorado Northern Sierra Nevada Foothills. Wright's Lake Road (Forest Road 4) 2.1 road miles North of US Highway 50 (around 5-6 miles east of Kyburz). 1854 Comment
  UCR170242  Juncus effusus subsp. pacificus George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9908 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
  UCR190671  Juncus effusus var. exiguus George K. Helmkamp, E. A. Helmkamp 2007-9-4 12886 Amador Northern Sierra Nevada Mountains, along CA-88 at Mile-49, 3.1 miles east of Hams Station 1860 Comment
  UCR206992  Juncus effusus var. pacificus George K. Helmkamp, Amy Barnes 2009-7-8 15150 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
  UCR179303  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2006-10-10 11527 Yuba Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49 just north of the Nevada County line at the Middle Yuba River bridge 451 Comment
  UCD141563  Juncus longistylis G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11068 El Dorado Northern Sierra Nevada Mtns: along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Highway US-50. 1864 Comment
  UCR14584  Juncus mexicanus George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, Owens River, Big Springs 2195 Comment
  CLARK-A1045-1140  Juncus nevadensis George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCR115850  Juncus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2000-7-18 5891 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
  UCR249170  Keckiella lemmonii George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20788 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.8 miles west of Goodyears Bar, c. 5 miles west of Downieville 779 Comment
  SD197907  Kelloggia galioides G. K. Helmkamp, Mary Alice Barnes and Amy Barnes 2008-7-28 13917 El Dorado Wright's Lake Road, 3.4 miles north of its junction with CA Highway 50. 2043 Comment
  SD243202  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2010-9-1 16898 El Dorado Northern Sierra Nevada Mountains: Mehrten Springs Road, 0.6 mile north of its junction with CA-88. 2018 Comment
  SD247500  Kelloggia galioides George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22087 El Dorado Northern Sierra Nevada Mountains: Mehrten Spring Road, 0.5 mile north of CA-88 (Peddler Hill 7.5'Q) 1793 Comment
  UCR197361  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2008-6-23 13719 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
  UCR246824  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2010-7-28 16649 Placer Northern Sierra Nevada Mountains, Forest Hill Road at Hidden Treasure Road, 10.4 miles northeast of the city of Foresthill 1384 Comment
  VVC465  Kelloggia galioides G. K. Helmkamp 1996-6-11 1141 San Bernardino San Bernardino Mtns., 1.2 mi. SW of Tulip Ave, City of Big Bear Lake 2143 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
  UCD133547  Lactuca serriola G. K. Helmkamp; E. A. Helmkamp 2007-9-24 13005 Calaveras Northern Sierra Nevada Mountains: in Rich Gulch along Gwin Mine Road, 1.2 miles north fo Paloma. 329 Comment
  UCR205149  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2008-10-30 14293 Sacramento Southern Sacramento Valley, along Highway E13 (Twin Cities Road) 4.4 miles west of its junction with CA-99 5 Comment
  RSA749726  Lagophylla glandulosa George K. Helmkamp, E. A. Helmkamp 2008-10-2 14197 Sacramento Sacramento Valley: Latrobe Road, 7.4 miles west of Latrobe. 67 Comment
  SEINET3238898 Image available Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2008-3-12 13148 Amador Foothills, northern Sierra Nevada Mountains: 0.2 mile east of the junction of Bell Road and CA-49 at Enterprise; junction of Plymouth and Pigeon Creeks. 259 Comment
  UCR172663  Lamium amplexicaule George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10185 A El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest, along Volcanoville Road, 7.7 mi N of Wentworth Springs road (NE of Georgetown) 915 Comment
  UCR184929  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2007-3-10 11604 El Dorado Northern Sierra Nevada Mountains Foothills, Rattlesnake Bar Rd, 3.0 miles southwest of Calif. Hwy 49, SW of Pilot Hill 390 Comment
  UCR206691  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2009-1-31 14323 Colusa Sacramento Valley, Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa 16 Comment
  CLARK-A1045-20  Langloisia matthewsii George K. Helmkamp 1977-4-23 San Bernardino 2 miles south of Trona; sandy slope; Searless Lake 15' Q; Westend 7.5' Q Comment
  CLARK-A1045-9  Langloisia schottii George K. Helmkamp 1977-4-21 San Bernardino Adelanto 2 miles north of Adelanto; east of U.S. Route 395; creosote bush scrub; ; Adelanto 7.5' Q 883 Comment
  UCR120521  Langloisia setosissima subsp. setosissima George K. Helmkamp, E. A. Helmkamp 2001-3-17 6278 Imperial Colorado Desert., Small canyon parallel to and south of I-8, 2.1 mi east of Sidewinder Rd. 76 Comment
  UCR122938  Langloisia setosissima subsp. setosissima George K. Helmkamp, E. A. Helmkamp 2001-3-30 6420 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 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
  UCR230988  Lapsana communis George K. Helmkamp, E. A. Helmkamp 2011-7-2 17628 El Dorado Northern Sierra Nevada Mountains Foothills, Forni Road at Weber Creek crossing, 1.3 miles south of its Placerville junction with US-50 473 Comment
  SD254538  Lasthenia californica George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20230 Calaveras Northern Sierra Nevada foothills: Along CA-26 at the juncton with Shelton Road, southwest of Valley Springs, NE of Linden (Valley Springs SW 7.5'Q) 203 Comment
  SEINET13276810 Image available Lasthenia californica George K. Helmkamp, Elizabeth Helmkamp 2013-1 20230 Calaveras Northern Sierra Nevada Foothills: Along CA-26 at the junction with Shelton Road, southwest of Valley Springs, NE of Linden (Valley Springs SW 7.5' Q.) 204 Comment
  UCR249965  Lasthenia californica George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20230 Calaveras Northern Sierra Nevada foothills, Along CA-26 at the junction with Shelton Road, southwest of Valley Springs, NE of Linden 204 Comment
  CLARK-A1045-288  Lasthenia coronaria George K. Helmkamp 1979-5-16 Riverside San Jacinto Mountains along San Jacinto Ridge Road at Oak Spring turnoff; chaparral; ; Lake Fulmor 7.5'Q 914 Comment
  RSA615148  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 1998-4-8 3218 San Luis Obispo Elkhorn Grade Rd, 13.7 mi NW of jct with CA Hwy 33 (roughly WNW of Maricopa). 549 Comment
  UCR103981  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 1997-3-8 1403 B San Luis Obispo Inner Coast Range, Carrizo Plain; 15.6 mi. NW of Calif. Hwy 166 on Soda Lake Rd. 732 Comment
  UCR161992  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 2005-3-14 9186 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 12.8 mi. NE of Los Olivos 905 Comment
  UCR121533  Lathyrus odoratus George K. Helmkamp, E. A. Helmkamp 2002-4-21 7616 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 11.2 mi east of Cambria 396 Comment
  UCD106442  Lathyrus sulphureus G. K. Helmkamp 2006-5-20 10494 El Dorado Northern Sierra Nevada Foothills: Along CA Hwy 193, 0.4 mi. S of Kelsey. 604 Comment
  UCD106444  Lathyrus sulphureus G. K. Helmkamp; Elizabeth Helmkamp 2007-5-7 11949 El Dorado Northern Sierra Nevada Mountain Foothills: Pedro Hills Road, 0.3 mile west of the junction with CA-49, junction 5.3 miles south of Cool. 299 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
  UCR256491  Lathyrus sulphureus George K. Helmkamp 2014-5-2 22832 A El Dorado Sierra Nevada Mountains Foothills, Forebay Road at Kodiak Trail, about 1 mile northwest of Forebay Reservoir 1079 Comment
  UCR122545  Lathyrus vestitus subsp. vestitus George K. Helmkamp, E. A. Helmkamp 2001-5-20 6675 Riverside San Jacinto Mountains., Apple Canyon Rd, 1.5 mi NE of CA-74 1463 Comment
  UCR162152  Lathyrus vestitus var. vestitus George K. Helmkamp, E. A. Helmkamp 2005-2-14 8916 San Luis Obispo Outer South Coast Ranges, Santa Lucia Mtns; east of Lake Lopez, along Lopez Drive, 0.7 mi N of Hi Mountain Road 274 Comment
  UCR184846  Laurentia fluviatilis George K. Helmkamp, E. A. Helmkamp 2007-5-11 11992 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Diamond Springs 524 Comment
  UCR161910  Layia chrysanthemoides George K. Helmkamp, E. A. Helmkamp 2005-3-1 8985 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
  UCR257023  Layia pentachaeta subsp. pentachaeta George K. Helmkamp, Amy Barnes 2014-4-23 22783 Placer Sierra Nevada Mountains Foothills, Old Forest Hill Road, 0.4 mile northeast of its junction with CA-49 at North Fork American River 290 Comment
  JEPS119462  Layia platyglossa George K. Helmkamp with E. A. Helmkamp 2012-2-25 18581 El Dorado Foothills, northern Sierra Nevada Mountains, SE of Placerville, Pleasant Valley Road, 1.4 miles northeast of Bucks Bar Road and at Gold Oak Charter School Comment
  SD240880  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2012-2-25 18581 El Dorado Foothills, Northern Sierra Nevada Mountains: SE of Placerville, Pleasant Valley Road, 1.4 miles northeast of Bucks Bar Road and at Gold Oak Charter School (Camino 7.5'Q) 747 Comment
  UCR171023  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2006-2-9 10063 Placer Northern Central Valley, Clark Tunnel Road and Calif. Highway 193, east of Lincoln 113 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
  UCR232191  Leersia oryzoides George K. Helmkamp, E. A. Helmkamp 2011-10-8 18387 Glenn Northern Sacramento Valley, Co. Road 61 (Riz Rd.), 2.6 miles east of CA-45 and at the junction with Co. Road V, 8.26 mi. SE (124 deg. ) of Willows 26 Comment
  UCD133976  Leontodon saxatilis G. K. Helmkamp; E. A. Helmkamp 2006-10-6 11468 Amador Northern Sierra Nevada Mountains: along Highway CA-49 beside big Indian Creek. 2.2 miles south of el dorado County Line. 271 Comment
  UCR183106  Leontodon taraxacoides George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10335 Amador Northern Sierra Nevada foothills, Grass Valley Creek, 1.2 miles east of Pine Grove along Calif. Hwy 88 762 Comment
  UCR235299  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2011-11-17 18454 El Dorado Southeastern Sacramento Valley, 1.6 miles west of Latrobe on South Shingle Road 194 Comment
  RSA0093525  Leontodon taraxacoides subsp. longirostris George K. Helmkamp, Mary Alice Barnes 2013-5-17 20611 Amador Northern Sierra Nevada Mountains Foothills. Stony Creek Road, 6.8 miles southwest of Jackson, 0.57 mi. NE (20 deg ) of Chrome Mountain. 302 Comment
  RSA715232  Leontodon taraxacoides subsp. taraxacoides George K. Helmkamp, E. A. Helmkamp 2005-9-12 9855 El Dorado Northern Sierra Nevada Foothills, E of Sacramento; Sly Park Road (County Hwy E-16) ca. 2 miles E of Pleasant Valley. 854 Comment
  UCR24975  Lepidium appelianum George K. Helmkamp 1981-8-6 s.n. Kern Pinon Pines Camp near Mt. Pinos. [Lake of the Woods] Near the junction of Cuddy Valley Rd. and Lockwood Valley Rd 1677 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
  SD143973  Lepidium lasiocarpum G. K. Helmkamp, E. A. Helmkamp 1998-3-19 2919 Imperial Colorado Desert: Imperial Dam area, just south of the dam on highway S-24 75 Comment
  UCR120514  Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2001-6-3 6803 Solano San Francisco Bay Region, Hammond Island SE of Fairfield. Grizzly Rd., 7.5 mi SE of entrance to wildlife preserve 6 Comment
  UCR182283  Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2006-10-23 11568 Amador Central Valley/ Northern Sierra Nevada Foothills, along Calif. Hwy 16, 0.2 mile east of Waits Station, southwest of Plymouth 305 Comment
  UCD115786  Lepidium nitidum G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11657 Calaveras Eastern Sacramento Valley: about 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCR253211  Lepidium nitidum var. nitidum George K. Helmkamp, Amy Barnes 2014-4-7 22731 Sacramento Sacramento Valley, Clay East Road, 1 mile east of its junction with CA-104 52 Comment
  UCR207448  Lepidium virginicum George K. Helmkamp, E. A. Helmkamp 2009-7-30 15318 Calaveras Sierra Nevada Mountains, Ottawa Drive, 0.1 mile south of its junction with CA-4, 1.2 miles northeast of Dorrington 1471 Comment
  CLARK-A1045-70  Lepidium virginicum var. pubescens George K. Helmkamp 1978-4-27 Riverside San Jacinto Mountains [probably Bee Canyon/San Jacinto Ridge Road area]; Lake Fulmor 7.5'Q Comment
  OBI82113  Lepidium virginicum var. pubescens George K. Helmkamp, Belinda Pesheck 2013-7-14 21053 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
  SEINET11261799  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17900 Placer Northern Sierra Nevada Mountains: Bowman Lake Road, 0.9 miles N of its junction with CA Hwy 20, 0.85 miles NE (23 degrees) of Emigrant Gap and N of I-80.; 0 1434 Comment
  UCR230653  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17852 Calaveras Northern Sierra Nevada Mountains Foothills, CA Hwy 4, 4.2 miles northeast of Arnold 1221 Comment
  UCR233355  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2011-9-1 18234 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  HSC79073  Lepidospartum squamatum G. K. Helmkamp 1983-10-8 - 20 San Bernardino TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside the pipeline road in the middle of the TNC owned area. 762 Comment
  UCR59846  Leptochloa filiformis 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
  UCD118622  Leptosiphon bicolor G. 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
  SBBG129004  Leptosiphon parviflorus G. K. Helmkamp, E. A. Helmkamp 2012-4-24 18833 El Dorado Bear Crk Rd, 0.4 mi S of its jct with Meadow Brook Rd, 2.5 mi NE (66 deg) of Garden Valley 705 Comment
  UCR13838  Lessingia filaginifolia George K. Helmkamp 1973-8-8 s.n. San Luis Obispo Central Coast, Morro Bay, Baywood Park, hillside c. 1 mi from ocean 3 Comment
  CLARK-A1045-991  Lessingia lemmonii George K. Helmkamp 1977-6-11 B Kern Freeman Canyon Junction of State Highway 178 and 14; ; Freeman Junction 7.5'Q Comment
  CAS-BOT-BC226949  Lessingia leptoclada George K. Helmkamp; E. A. Helmkamp 2011-7-30 17914 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road at the junction with North-South Road, 0.67 mi. NW (300 deg. ) of jct. with Hwy 88; 8.9 miles southeast of Omo Ranch 1457 Comment
  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-A1045-386  Lewisia nevadensis George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains Keller Peak 7.5'Q Comment
  UCR123117  Lewisia pygmaea George K. Helmkamp, E. A. Helmkamp 1998-8-13 4402 Mono Eastern Sierra Nevada Mountains, Nunatak trail beside CA Hwy 120, about 1 mi south of Yosemite National Park entrance kiosk 2973 Comment
  UCR121447  Lewisia triphylla George K. Helmkamp, E. A. Helmkamp 1999-6-30 5083 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  UCR190336  Ligusticum grayi George K. Helmkamp, E. A. Helmkamp 2007-8-4 12675 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
  UCR206079  Ligusticum grayi George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13921 El Dorado Northern Sierra Nevada Mountains, Dark Lake, beside Wrights Lake Road 0.4 mile northwest of the entrance to Wrights Lake 2134 Comment
  UCR176029  Lilium parvum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10964 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR232273  Limnanthes douglasii subsp. rosea George K. Helmkamp, E. A. Helmkamp 2011-3-29 17089 Calaveras Eastern San Joaquin Valley, along CA-26, 0.4 mile north of its junction with CA-12, 0.16 mi. N of Double Springs Rd., 4 miles NE (64 deg. ) of Valley Springs 320 Comment
  UCR106461  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 1998-5-18 3756 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
  UCR173357  Linanthus bicolor George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10421 Nevada Northern Sierra Nevada Foothills, along Calif. Hwy 49, 2.1 mi. N of the South Yuba River bridge 534 Comment
  UCR197381  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 2008-4-25 13335 El Dorado Sierra Nevada Mountains Foothills, along Bear Creek Road 0.4 mile southeast of its junction with Meadow Brook Road, SE of Georgetown 747 Comment
  RSA794892  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17735 Calaveras Winton Road (Forest Route 7N03), 14.4 miles east of its junction with CA-26 in West Point. 1590 Comment
  UCR194924  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2007-5-27 12154 El Dorado Northern Sierra Nevada Mountains Foothills, 0.7 mile down a hiking trail northeast of CA-49; trail starting 3.5 miles northwest of Placerville 430 Comment
  UCR197640  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2008-6-9 13637 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.6 mile south of its junction with CA-88, jct. is 4.0 miles east of Cook's Station 1607 Comment
  UCR206733  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2009-7-2 15102 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR229585  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17927 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
  UCR249545  Linanthus ciliatus George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20902 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the junction with Pilliken Road 1825 Comment
  UCR88350  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 1995-6-22 95- 4 -26 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 Comment
  UCSB37070  Linanthus inyoensis Helmkamp, G.; Vasek, F. 1978-6-2 Mono Long Valley area of the Owens River, 1.2 miles north of Whitmore Hot Springs 2133 Comment
  UCR127139  Linanthus liniflorus George K. Helmkamp, E. A. Helmkamp 1998-5-19 3838 Monterey Salinas Valley, 3.7 mi south of Lockwood on G-14, Interlake Road near northwest end of Lake San Antonio 320 Comment
  UCR173157  Linanthus parviflorus George K. Helmkamp, Elizabeth Helmkamp 2006-4-27 10241 El Dorado Northern Sierra Nevada Foothills, Junction of French Creek Road and Big Canyon Road, 0.5 mi. south of Frenchtown 340 Comment
  UCR161232  Linaria bipartita George K. Helmkamp, E. A. Helmkamp 2004-12-6 8874 San Luis Obispo Central Coast, Arroyo Grande Community Center, Ash and Elm Streets 30 Comment
  UCR141004  Linaria canadensis George K. Helmkamp 2004-3-10 8335 San Luis Obispo Central Coast, Nipomo Mesa, along Pomeroy Rd, 0.2 mi N of Willow Rd, NW of Nipomo 91 Comment
  UCR196851  Linum lewisii var. lewisii George K. Helmkamp 2008-6-17 13673 Amador Northern Sierra Nevada Mountains, Bear River Reservoir Road, 0.1 mile south of its junction with CA-88 1991 Comment
  CAS-BOT-BC228607  Lithophragma George K. Helmkamp; E. A. Helmkamp 2011-5-10 17231 Amador Northern Sierra Nevada Mountains Foothills: Turner Road, 0.8 miles south of its junction with Amador Creek Road, 0.95 mi. SE (119 deg. ) of Amador City 311 Comment
  UCR191084  Lithophragma campanulatum George K. Helmkamp, E. A. Helmkamp 2007-6-8 12295 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 2.0 miles south of Mormon Emigrant Trail 1189 Comment
  UCR61736  Lithophragma parviflorum 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
  UCR172655  Lithophragma parviflorum var. parviflorum George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10192 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest; Along Calif. Hwy 193, 1 mi NE of Greenwood 518 Comment
  UCR123984  Loeseliastrum matthewsii George K. Helmkamp, E. A. Helmkamp 2001-3-30 6391 San Bernardino Mojave Desert, CA Hwy 62, 16.2 mi east of Utah Trail (Twentynine Palms) near Dale Lake 366 Comment
  UCR122444  Lolium perenne subsp. multiflorum George K. Helmkamp 2002-4-21 7476 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 6.9 mi east of Cambria 183 Comment
  UCR198533  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2008-3-22 13209 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
  UCR237008  Lolium perenne subsp. multiflorum George K. Helmkamp, E. A. Helmkamp 2012-5-22 19053 El Dorado Northern Sierra Nevada Mountains, along US-50, 4.0 miles west of Silver Fork 1050 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
  RSA0116242  Lomatium utriculatum George K. Helmkamp, E. Helmkamp 2000-4-24 5533 Monterey Coast Ranges: ca 4-5 miles due west of Jolon, Nacimiento-Ferguson road, 1.6 miles west of Mission road (junction just south of Mission San Antonio.) 320 Comment
  SD237288  Lomatium utriculatum G. K. Helmkamp, E. A. Helmkamp 2009-5-7 14628 Placer Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 13.6 miles east of its junction with Forrest Hill Road in Foresthill. 771 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
  UCR173179  Lomatium utriculatum George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10123 El Dorado Northern Sierra Nevada Foothills, Greenstone Road, c. 0.3 mi N of Pleasant Valley Road (ENE of Shingle Springs and south of US Hwy 50) 457 Comment
  UCR194931  Lomatium utriculatum George K. Helmkamp, E. A. Helmkamp 2007-5-18 12012 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 2.8 miles southeast of Foresthill 814 Comment
  RSA709455  Lomatium vaginatum George K. Helmkamp 2004-4-23 8525 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd., 15.0 mi NE of Los Olivos. 1341 Comment
  UCR230935  Lonicera hispidula var. vacillans George K. Helmkamp, E. A. Helmkamp 2010-10-6 17010 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26 (Stephen P. Teale Hwy), at the junction with Peregrine Road, 1.85 mi. east (84 deg. ) of Mokelumne Hill 503 Comment
  UCR174406  Lotus George K. Helmkamp, Elizabeth Helmkamp 2000-6-18 10551 A Mendocino Outer North Coast Ranges, 18.7 mi NW of US Hwy 1 (Cloverdale) along Calif. Hwy 128 274 Comment
  CLARK-A1045-536  Lotus argophyllus subsp. decorus George K. Helmkamp 1979-6-5 #2 San Bernardino San Bernardino Mountains at the junction of Forest Service road 3N08 and road 3N66Y; dry flat under pines; ; Big Bear City 7.5'Q 2285 Comment
  UCR160732  Lotus benthamii George K. Helmkamp, E. A. Helmkamp 2005-6-5 9517 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
  UCR119931  Lotus corniculatus George K. Helmkamp, E. A. Helmkamp 1999-5-20 43831 Santa Barbara Central Coast, Casmalia Hills; Corralitos Canyon, southeast of Guadalupe, 3.8 mi southeast of CA Hwy 1 on Brown Road 305 Comment
  UCR123137  Lotus corniculatus George K. Helmkamp, E. A. Helmkamp 2001-6-2 6798 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
  UCR91701  Lotus corniculatus George K. Helmkamp 1996-5-24 1009 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  UCR184969  Lotus denticulatus George K. Helmkamp, E. A. Helmkamp 2007-4-23 11806 Amador Foothills, Northern Sierra Nevada Mountains, junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 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
  UCR102502  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 1998-4-9 3278 Kern Foothills of the Tehachapi Mtns., east of Arvin along Calif. Hwy 223 305 Comment
  UCR122255  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2002-4-15 7398 Santa Barbara Sierra Madre Mountains, Miranda Pine Rd., 8.3 mi SE of Calif. Hwy 166; beside Miranda Pine Mountain 1280 Comment
  UCR250903  Lotus humistratus George K. Helmkamp, Mary Alice Barnes 2013-4-18 20345 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
  UCR196771  Lotus incanus George K. Helmkamp, E. A. Helmkamp 2008-6-3 13588 El Dorado Sierra Nevada Mountains, Forbay Road, 4.8 miles northwest of its junction with CA-50 at Pollock Pines 965 Comment
  RSA752662  Lotus micranthus George K. Helmkamp, E. A. Helmkamp 2008-5-8 13423 Calaveras Skull Flat Road, 2.5 miles north of its junction with Winton Road, northeast of West Point 916 Comment
  RSA0049984  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19135 Amador 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
  UCR170350  Lotus nevadensis var. nevadensis George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9898 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
  UCR229539  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-7-26 17854 Placer Northern Sierra Nevada Mountains, Emigrant Gap Road, 0.1 mile west of its junction with US-80, 0.65 mi. NE (65 deg. ) of Emigrant Gap 1590 Comment
  UCR233316  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-9-1 18214 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
  UCR258975  Lotus nevadensis var. nevadensis George K. Helmkamp, Amy Barnes 2014-10-10 23130 Amador Northern Sierra Nevada Mountains, west side of Bear River Reservoir, 0.2 mile north of the dam 1796 Comment
  UCR232237  Lotus oblongifolius George K. Helmkamp, E. A. Helmkamp 2010-8-3 16709 Calaveras Northern Sierra Nevada Mountains, Forest Route 7N23 (Black Creek Road) 0.1 mile north of the junction with CA-4 2005 Comment
  UCR235143  Lotus oblongifolius George K. Helmkamp, William Barnes 2010-9-4 16922 El Dorado Northern Sierra Nevada Mountains, Mehrten Spring Rd and continuing on Cat Creek Rd., 4.7 miles northwest of CA-88; Middle Fork of Cosumnes River 1620 Comment
  UCR189044  Lotus oblongifolius var. oblongifolius George K. Helmkamp, E. A. Helmkamp 2007-7-27 12610 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20 1793 Comment
  UCR206680  Lotus oblongifolius var. oblongifolius George K. Helmkamp, Amy Barnes 2009-7-8 15134 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
  UCR219053  Lotus pinnatus George K. Helmkamp, E. A. Helmkamp 2009-9-15 15611 Amador Northern Sierra Nevada Mountains, south side of Bear River Reservoir, 0.1 mile east of the dam 1774 Comment
  CLARK-A1045-1005  Lotus purshianus George K. Helmkamp 1978-6-6 Santa Barbara Santa Ynez Mountains 2 miles north of the Pass; dry field; Solvang 7.5'Q Comment
  UCR209515  Lotus purshianus George K. Helmkamp, E. A. Helmkamp 2009-8-6 15403 B 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 1590 Comment
  UCR176028  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2006-8-17 11265 El Dorado Northern Sierra Nevada Mtns foothills, Lake Oaks Mobile Home Park 530 Comment
  UCR176249  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2006-8-11 11218 Placer Northern Sierra Nevada Mtns foothills, along Forest Hill Rd., 8.7 miles northeast of Forest Hill 1311 Comment
  UCR161221  Lotus salsuginosus var. salsuginosus George K. Helmkamp, E. A. Helmkamp 2005-3-5 9029 San Luis Obispo Outer South Coast Ranges, Santa Lucia Wilderness N of Lopez Lake, Upper Lopez Canyon Road, 5.5 mi N of jct with Lopez Road 335 Comment
  CLARK-A1045-1381  Lotus strigosus George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay Turri Road west of Morro Bay; Morro Bay S 7.5'Q Comment
  UCR145621  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5485 A 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
  UCR161930  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 2005-2-24 8970 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
  CLARK-A1045-722  Lotus tomentellus George K. Helmkamp 1978-5-1 San Bernardino Mojave Desert 3.3 miles north of Slash-X Ranch, off State Highway 247; Ord Mts 15'Q Comment
  UCR201931  Lotus uliginosus George K. Helmkamp, E. A. Helmkamp 2008-8-20 14024 Placer Northern Sierra Nevada Mountains, Donner Pass Road on the west side of Donner Pass and east of Norden 2149 Comment
  UCR206947  Lotus uliginosus George K. Helmkamp, E. A. Helmkamp 2009-5-28 14833 Yuba Sierra Nevada Mountains Foothills, along CA-49, 2.2 miles north of the Camptonville exit 811 Comment
  RSA714085  Lotus unifoliolatus George K. Helmkamp, Elizabeth A. Helmkamp 2005-9-23 9907 El Dorado Wrights Lake Road (Forest Road 4) 2.1 road miles N o f US Highway 50 (ca. 5-6 mi. E of Kyburz). 1951 Comment
  SEINET273128 Image available Lotus wrangelianus G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3643 Monterey Along CA Hwy 198 6.2mi W of the King/Monterey County lines 503 Comment
  UCR157809  Lotus wrangelianus George K. Helmkamp, E. A. Helmkamp 1998-6-29 4201 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  UCR61718  Lupinus George K. Helmkamp 1990-4-17 s.n. San Luis Obispo Avila Beach [near Sycamore Springs], San Luis Bay Drive and Avila Beach Drive 15 Comment
  RSA752664  Lupinus adsurgens George K. Helmkamp, E. A. Helmkamp 2008-4-30 13373 El Dorado Traverse Creek/Darling Ridge Road, 6.0 miles east of its junction with CA-193, c. 8.5 mi. NNE of Placerville 734 Comment
  UCR218265  Lupinus albicaulis George K. Helmkamp, E. A. Helmkamp 2010-5-22 16077 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
  RSA0035850  Lupinus albifrons var. albifrons George K. Helmkamp, Mary Alice Barnes 2013-4-18 20361 Placer Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 ) of Weimar 512 Comment
  UCR130617  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 1999-5-21 4856 Monterey Santa Lucia Mountains, Willow Creek Rd 1.7 mi east of Calif. Hwy 1 north of Gorda 290 Comment
  UCR161786  Lupinus albifrons var. albifrons George K. Helmkamp, E. A. Helmkamp 2005-3-14 9138 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  SD237431  Lupinus albifrons var. collinus G. K. Helmkamp, E. A. Helmkamp 2008-5-15 13448 El Dorado Sierra Nevada Mountains: White Meadow Road about 1.3 miles west of its junction with Ice House Road. 1134 Comment
  UCR250637  Lupinus albifrons var. collinus George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20889 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
  SD247418  Lupinus apertus George Helmkamp, E. A. Helmkamp 2013-6-19 20940 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.8 mile north of Mormon Emigrant Trail and near Jim Quinn Spring, N of Carson Pass Hwy (Tragedy Spring 7.5'Q) 2116 Comment
  UCR159325  Lupinus arboreus George K. Helmkamp, E. A. Helmkamp 2004-7-14 8765 Santa Barbara Southern Central Coast, Surf, NW of Lompoc 46 Comment
  UCR196810  Lupinus arbustus George K. Helmkamp, E. A. Helmkamp 2008-7-16 13795 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR245853  Lupinus argenteus var. palmeri George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22194 Alpine Northern Sierra Nevada Mountains, along CA-89, 1.3 miles southwest of Monitor Pass 2503 Comment
  SEINET2042025  Lupinus arizonicus George Helmkamp, E. A. Helmkamp 2001-3-30 6384 San Bernardino Mojave Desert; CA-62, 16.2 mi E of Utah Tr. (29 Palms) near Dale Lake. 366 Comment
  UCR103664  Lupinus arizonicus George K. Helmkamp, E. A. Helmkamp 1998-1-17 2555 Riverside Coachella Valley, alongside Hwy 195 south of Mecca and at the S edge of the Torres Martinez Indian Reservation -30 Comment
  SD237433  Lupinus benthamii G. K. Helmkamp, E. A. Helmkamp 2010-4-23 15908 Placer Sierra Nevada Mountains Foothills: along Salmon Falls Road, at Miners Valley Road, 4.5 miles south of junction with CA-49 at Pilot Hill (Pilot Hill 7.5'Q) 287 Comment
  SD241010  Lupinus benthamii G. K. Helmkamp, E. A. Helmkamp 2010-4-17 15894 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, about 0.2 mile northeast of the entrance to the Folsom Lake recreational area. 305 Comment
  UCR207662  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2009-4-21 14537 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR250592  Lupinus benthamii George K. Helmkamp, Mary Alice Barnes 2013-4-18 20362 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
  UCR257565  Lupinus benthamii George K. Helmkamp, Amy Barnes 2014-4-23 22774 Placer Sierra Nevada Mountains Foothills, Old Forest Hill Road, 0.4 mile northeast of its junction with CA-49 at North Fork American River 290 Comment
  CAS-BOT-BC520366  Lupinus bicolor George K. Helmkamp 2014-4-5 22662 Amador Sierra Nevada Foothills: jct of Tonzi Rd and CA-124, NE of Ione 201 Comment
  CDA36239  Lupinus bicolor G. K. Helmkamp, E. A. Helmkamp 2007-5-1 11923 El Dorado Foothills Northern Sierra Nevada Mountains; Along Hwy CA-49 at the junction with Teal Road, 3.0 miles northwest of US-50 in Placerville. 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
  RSA785402  Lupinus bicolor George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16328 El Dorado Sierra Nevada Mtns Foothills: about 0.1 mi S of Slug Gulch Road at a point 4.7 mi E of its junction with Perry Creek Road. 1021 Comment
  SD244159  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2012-5-31 19112 Calaveras Northern Sierra Nevada Mountain Foothills: Lily Gap Road, 0.9 mile northeast of its junction with Winton Road, 8.1 km NE (60a^z) of West Point (Devils Nose 7.5'Q) 1132 Comment
  UCD107253  Lupinus bicolor G. K. Helmkamp; E. A. Helmkamp 2007-5-9 11976 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
  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
  UCR127119  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 1998-5-19 3810 Monterey Central Coast Ranges, Salinas Valley Quinado Cyn., 12 mi south of King City along (G-14) Jolon Road 412 Comment
  UCR130640  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 1999-4-18 4697 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
  UCR140387  Lupinus bicolor George K. Helmkamp 2004-3-15 8375 San Luis Obispo Central Coast, edge of Nipomo Mesa overlooking Cienaga Valley, along Calif. Hwy 1 (Mesa View Dr.), 0.3 mi N of Halcyon Rd. 76 Comment
  UCR188850  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2007-3-25 11705 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
  UCR230146  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2011-5-21 17354 Calaveras Northern Sierra Nevada Mountains Foothills, Railroad Flat Road at junction with Wharregard Road and beside Esperanzo Creek, 8.3 miles NW (289 deg. ) of Arnold 759 Comment
  UCR235408  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2012-4-19 18800 Amador Foothills, northern Sierra Nevada Mountains, Fiddletown Road, 0.2 mile east of its junction with County Road E-16, c. 0.7 mi. E of Hwy 49 at Plymouth 416 Comment
  UCR238437  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2012-4-4 18671 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 0.6 mile northeast of its junction with Paloma Road, 4.5 km SW (213 deg. ) of Mokelumne Hill 489 Comment
  UCR249939  Lupinus bicolor George K. Helmkamp 2013-3-14 20181 Calaveras San Joaquin Valley/Sierra Nevada Foothills, Jenny Lind Road (County Road J14) 0.1 mile north of its junction with Kirby Road, 24 mi. NE of Stockton 91 Comment
  UCR253610  Lupinus bicolor George K. Helmkamp 2014-3-18 22571 San Joaquin San Joaquin Valley, along Hwy CA-88 on the southwest side of the border with Calaveras County, 7.1 mi. SW (220 deg. ) of Ione 87 Comment
  UCR258240  Lupinus bicolor George K. Helmkamp, Amy Barnes 2013-3-28 20239 Placer Eastern Sacramento Valley, NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 43 Comment
  CLARK-A1045-1097  Lupinus breweri var. bryoides George K. Helmkamp 1977-7-3 Mono Sierra Nevada road to the Lake; ; Tioga Pass 7.5'Q 2895 Comment
  CLARK-A1045-1228  Lupinus caudatus George K. Helmkamp 1978-6-11 Mono Long Valley 1.5 miles west of Benton Crossing; ; Whitmore Hot Springs 7.5'Q 2133 Comment
  UCR97546  Lupinus excubitus George K. Helmkamp, E. A. Helmkamp 1997-3-8 1412 San Luis Obispo c. 6 mi. west of Soda Lake Rd along Calif. Hwy 58 549 Comment
  CLARK-A1045-1544  Lupinus excubitus subsp. hallii George K. Helmkamp 1977-8-3 Ventura Comment
  RSA709022  Lupinus formosus var. formosus George K. Helmkamp, E. A. Helmkamp 2005-5-12 9434 Monterey Central Coast Ranges: 8 mi west of US-101 on Hwy CA-G-18 in Hames Valley. 341 Comment
  UCD107801  Lupinus fulcratus G. K. Helmkamp 2007-6-29 12459 Amador Northern Sierra Nevada Mountains: South side of CA-88, 0.2 mile west of Carson Spur summit. 2421 Comment
  UCR163007  Lupinus latifolius subsp. latifolius George K. Helmkamp, E. A. Helmkamp 2005-4-6 9317 Santa Barbara Outer south coast ranges, Santa Ynez Mountains; San Miguelito Road at mile 3.7, SSW of Lompoc 221 Comment
  UCR189009  Lupinus latifolius var. columbianus George K. Helmkamp 2007-7-7 12460 El Dorado Northern Sierra Nevada Mountains, along CA-89, 5.4 miles northwest of Luther Pass in the Grass Lake area 2018 Comment
  CHSC100671  Lupinus latifolius var. latifolius G. K. Helmkamp 2004-4-14 8446 Santa Barbara Santa Inez Mountains: Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, ca. 5 miles SE of Lake Cachuma. On east-facing, open slope and roadside ditches. 548 Comment
  SD167116  Lupinus latifolius var. latifolius G. K. Helmkamp, E. A. Helmkamp 2005-3-9 9088 San Luis Obispo Irish Hills; See Canyon, 1.0 mile north of San Luis Bay Drive. 42 Comment
  UCD108397  Lupinus lepidus var. confertus G. K. Helmkamp 2007-7-7 12465 El Dorado Northern Sierra Nevada Mountains, along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area. 2338 Comment
  UCR189008  Lupinus lepidus var. confertus George K. Helmkamp 2007-7-7 12465 El Dorado Northern Sierra Nevada Mountains, along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area 2338 Comment
  UCR197014  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2008-7-16 13794 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR257797  Lupinus lepidus var. confertus George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19441 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
  UCR27488  Lupinus lepidus var. confertus George K. Helmkamp 1982-9-17 s.n. Ventura Transverse Range, flat area just below the radio towers, near the top of Mt. Pinos 2652 Comment
  UCR176451  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 2006-7-31 11093 El Dorado Northern Sierra Nevada Mountains, 0.3 mile west of the junction of Wrights Lake Road (Forest Route 4) and the road from Ice House Reservoir 2037 Comment
  UCR189144  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 2007-7-17 12554 Alpine Northern Sierra Nevada Mountains, Blue Lake Road about nine miles south of its junction with CA-88 2511 Comment
  UCR245555  Lupinus lepidus var. sellulus George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22248 Alpine Northern Sierra Nevada Mountains, along CA-4, 12.4 miles southwest of the CA-89 junction and just north of Kinney Reservoir 2540 Comment
  SEINET7249127  Lupinus lepidus var. sellulus George K. Helmkamp, Elizabeth Helmkamp 2013-1 Alpine Comment
  RSA667115  Lupinus meionanthus George K. Helmkamp, E. A. Helmkamp 1997-9-10 2324 Mono 4.9 mi. SE of CA hwy 120 on Sagehen Meadows Rd. 2591 Comment
  SEINET13276811 Image available Lupinus microcarpus var. densiflorus George K. Helmkamp, Mary Alice Barnes 2013-1 20646 Calaveras Northern Sierra Nevada Mountains Foothills: Along CA Hwy 26, 0.4 mile northeast of its junction with Campo Seco Turnpike Road, SW of Mokelumne Hill (Mokelumne Hill 7.5' Q.) 437 Comment
  SEINET2441062  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14722 Yolo Western Sacramento Valley: Capay Valley. Along CA-16, 1.5 miles west of Capay (Esparato 7.5'.). 70 Comment
  UCD108716  Lupinus microcarpus var. densiflorus G. K. Helmkamp; E. A. Helmkamp 2007-4-5 11744 Amador Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City. 309 Comment
  UCR101065  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-4-9 3254 Kern 14 mi. NE of Taft; along Tupman Rd just north of its intersection w/ Calif. hwy 199 (W of the outlet canal). 91 Comment
  UCR118380  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-7-1 4243 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon Road, 5.2 miles southwest of Los Osos Valley Road 244 Comment
  UCR127118  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-5-19 3813 Monterey Central Coast Ranges, Salinas Valley Quinado Cyn., 12 mi south of King City along (G-14) Jolon Road 412 Comment
  UCR157798  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-6-29 4148 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR206281  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2009-5-20 14722 Yolo Western Sacramento Valley, Capay Valley; along CA-16, 1.5 miles west of Capay 70 Comment
  UCR130090  Lupinus microcarpus var. microcarpus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5566 Monterey Salinas Valley., 8.4 mi lS of King City along G-14. 381 Comment
  CLARK-A1045-1378  Lupinus nanus George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay Turri Road at Morro Bay; Morro Bay S 7.5'Q Comment
  RSA0035677  Lupinus nanus George K. Helmkamp, Mary Alice Barnes 2013-4-18 20341 Placer Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 ) of Colfax 561 Comment
  UCD109062  Lupinus nanus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10382 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 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
  UCR102504  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 1998-4-9 3264 Kern Foothills of the Tehachapi Mtns., east of Arvin along Calif. Hwy 223 305 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
  UCD109455  Lupinus polyphyllus var. burkei G. 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
  UCR189897  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2007-8-9 12723 El Dorado Northern Sierra Nevada Mountains, Wright's Lake; south side of the lake at the entrance to the campground 2131 Comment
  UCR209556  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2009-8-4 15382 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 2637 Comment
  UCD109382  Lupinus polyphyllus var. polyphyllus G. K. Helmkamp; E. A. Helmkamp 2007-3-25 11708 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 0.9 mile east of its junction with CA-49 at the bridge of the junction with American River forks. 287 Comment
  CLARK-A1045-232  Lupinus sparsiflorus George K. Helmkamp 1978-4-1 Riverside Whitewater junction of Interstate highway 10 and Verbenia Avenue; Whitewater 7.5'Q Comment
  UCR106066  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 1997-3-7 1380 Kern San Emigdio Ranch, SE portion 945 Comment
  UCR161341  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2005-3-8 9085 San Luis Obispo Central Coast Hills., Irish Hills; crest of Prefumo Canyon Road, 5.2 mi west of Los Osos Valley Road 409 Comment
  SEINET3815699 Image available Lupinus truncatus George K. Helmkamp, E. A. Helmkamp 2005-2-18 8930 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
  UCR132754  Luzula comosa George K. Helmkamp 1977-7-4 s.n. Mono Owens Valley, Big Springs along the Owens River 2226 Comment
  SEINET6178408 Image available Luzula macrantha George K. Helmkamp, E. A. Helmkamp 2010-5-14 16036 El Dorado Sierra Nevada Mountains Foothills: Happy Valley Road, 1.1 mi. NE (69 degrees) of Somerset, just west of the bridge over the Cosumnes River.; 0 544 Comment
  UCR143562  Luzula parviflora George K. Helmkamp, E. A. Helmkamp 2000-7-17 5840 Mono Sierra Nevada Mtns., W side of Lake Mary, SW of Mammoth Lakes 2720 Comment
  SD239678  Lychnis coronaria George K. Helmkamp, E. A. Helmkamp 2012-6-13 19200 Nevada Northern Sierra Nevada Mountains Foothills: village of Washington, Relief Hill Road, 0.4 mile north of its junction with Mayb ert Road & NE of the bridge over the South Yuba River (Washington 7.5'Q) 790 Comment
  UCR177013  Lychnis coronaria George K. Helmkamp, E. A. Helmkamp 2005-9-23 9886 El Dorado Northern Sierra Nevada Foothills, Silver Fork, 2.1 mi west of Kyburz along US Highway 50 1220 Comment
  CLARK-A1045-144  Lycium andersonii George K. Helmkamp 1978-4-1 Riverside Deep Canyon Palm Desert 15'Q Comment
  UCR121566  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 1999-6-28 4988 San Mateo Pescadero Creek Watershed, Pescadero Road just north of Loma Mar 107 Comment
  UCR157980  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 1998-6-30 4208 San Luis Obispo South Coast Range, Alamo Creek Rd, 0.9 mile north of Calif. Hwy 166, near Twitchell Reservoir 320 Comment
  UCR173994  Lythrum hyssopifolia George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10800 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 0.2 mile north of West Point 838 Comment
  UCR206795  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2009-5-24 14776 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 3.3 miles eat of the Cosumnes River and CA-49 521 Comment
  UCR233016  Lythrum hyssopifolia George K. Helmkamp, E. A. Helmkamp 2011-5-12 17264 Sutter Sacramento Valley, Pleasant Grove, along Howsley Road opposite Pl. Gr. Elementary School, 1.0 mile west of Pleasant Grove Road and just west of the Post Office 15 Comment
  UCR257098  Lythrum hyssopifolia George K. Helmkamp, Mary Alice Barnes 2013-5-17 20625 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
  UCR93701  Lythrum hyssopifolia George K. Helmkamp 1996-5-25 1064 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
  UCR202551  Machaeranthera canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2008-9-22 14162 Alpine Northern Sierra Nevada Mountains, Hope Valley along Blue Lake Road, 0.1 mile south of the junction with CA-88 2180 Comment
  UCR257155  Madia George K. Helmkamp 2014-4-17 22741 Nevada Northern Sierra Nevada Mountains Foothills, along CA-120, 2.3 miles west of its junction with CA-49 in Grass Valley 729 Comment
  UCR15459  Madia bolanderi George K. Helmkamp 1977-9-1 s.n. Alpine Sierra Nevada Mtns., Road just east of Luther Pass 2317 Comment
  SD262196  Madia citrigracilis George K Helmkamp, Elizabeth Helmkamp 2013-8-2 22081 A El Dorado Northern Sierra Nevada Mountains: Mehrten Spring Road, 0.5 mile north of CA-88/Carson Pass Hwy (Peddler Hill 7.5'Q) 1793 Comment
  UCR173733  Madia citrigracilis George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-14 10703 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
  UCR233649  Madia citrigracilis George K. Helmkamp, E. A. Helmkamp 2011-7-17 17763 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg. ) of Peardale 686 Comment
  RSA750424  Madia citriodora George K. Helmkamp, E. A. Helmkamp 2008-9-9 14075 El Dorado junction of Bear Creek Road and Meadow Brook Road at Bear Creek; east of CA-193 and south of Georgetown 678 Comment
  CAS-BOT-BC518739  Madia elegans subsp. densifolia George K. Helmkamp; E. A. Helmkamp 2012-9-1 19739 Calaveras Northern Sierra Nevada Mountain Foothills: along CA-26 (West Point-Pioneer Rd) on the S side of the North Fork Mokelumne River 584 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
  RSA0012033  Madia exigua George K. Helmkamp, E. A. Helmkamp 2011-8-6 18007 Amador Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  RSA794534  Madia exigua George K. Helmkamp, E. A. Helmkamp 2011-7-17 17747 Nevada Red Dog Road, 1.6 miles northeast of its junction with You Bet Road, 3 miles NE (313 deg,) of Gold Run 867 Comment
  RSA794894  Madia exigua George K. Helmkamp, E. A. Helmkamp 2011-7-12 17728 Calaveras Winton Road (Forest Route 7N03), 12.6 miles east of its junction with CA-26 in West Point. 1503 Comment
  SD148229  Madia glomerata G. K. Helmkamp, E. A. Helmkamp 2001-7-8 6944 Trinity California Highway 36, 2.2 miles west of the Trinity/Shasta Co. line. 1159 Comment
  JEPS119409  Madia gracilis G. K. Helmkamp, E. A. Helmkamp 2009-8-6 15400 Amador ierra 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 Comment
  JEPS119411  Madia gracilis G. K. Helmkamp, E. A. Helmkamp 2009-8-19 15488 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 Comment
  JEPS119425  Madia gracilis G. K. Helmkamp, E. A. Helmkamp 2011-7-2 17627 El Dorado Northern Sierra Nevada Mountains Foothills, Forni Road at Weber Creek crossing, 1.3 miles south of its Placerville junction with US-50 Comment
  JEPS119466  Madia gracilis George K. Helmkamp with E. A. Helmkamp 2011-6-7 17461 Amador Northern Sierra Nevada Mountains Foothills, Pine Gulch Road, 0.5 mile north of its intersection with Sutter Creek Road Comment
  SD248342  Madia gracilis George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20804 Placer Northern Sierra Nevada Mountains Foothills: Yankee Jim's Road, 3.6 miles northwest of its junction with Forest Hill Road. 768 Comment
  SEINET3285079 Image available Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-6-10 14932 Shasta Southern Cascade Range; along CA-44, 1.2 miles west of Shingletown. 936 Comment
  UCR163901  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2005-3-30 9253 San Luis Obispo Outer South Coast Ranges, La Panza Range; Pozo Road, 6.5 mi NE of Hi Mountain Road, [c. 1 mi (airline) SW of Pozo Summit] 665 Comment
  UCR195159  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2007-5-26 12090 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 5.6 miles north of Nevada City 518 Comment
  UCR206057  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-6-11 14977 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
  UCR207876  Madia gracilis George K. Helmkamp, 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 511 Comment
  UCR209026  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2009-8-19 15488 El Dorado Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 21.6 miles north of CA-50 1716 Comment
  UCR218218  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2010-6-26 16416 Placer Sierra Nevada Mountains Foothills, Canyon Way, 1.2 miles south of its junction with Yankee Jim's Road, 1.7 mi. NE (24 deg. ) of Applegate 668 Comment
  UCR229538  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2011-7-26 17855 Placer Northern Sierra Nevada Mountains, Emigrant Gap Road, 0.1 mile west of its junction with US-80, 0.65 mi. NE (65 deg. ) of Emigrant Gap 1590 Comment
  UCR230989  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2011-7-2 17627 El Dorado Northern Sierra Nevada Mountains Foothills, Forni Road at Weber Creek crossing, 1.3 miles south of its Placerville junction with US-50 473 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
  RSA714096  Madia gracilis subsp. gracilis George K. Helmkamp, E. A. Helmkamp 2005-8-9 9775 El Dorado Northern Sierra Nevada Foothills: WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR121558  Madia madioides George K. Helmkamp, E. A. Helmkamp 1999-6-28 4977 B San Mateo Pescadero Creek Watershed, Pescadero Road just north of Loma Mar 107 Comment
  UCR222554  Madia madioides George K. Helmkamp, E. A. Helmkamp 2010-6-5 16244 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
  RSA0045140  Madia minima George K. Helmkamp, E. A. Helmkamp 2012-7-6 19325 El Dorado Ice House Road, 0.2 mile north of Ice House community, 10.7 miles north of US-50. 1683 Comment
  SEINET3246016  Madia minima G. K. Helmkamp, Elizabeth Helmkamp, Amy Barnes 2007-1 12381 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
  UCR173841  Madia minima George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10737 El Dorado Northern Sierra Nevada Mountains, 5.5 miles east of Ice House Road on the road to Wright's Lake 1860 Comment
  UCR175482B  Madia minima George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10694 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 0.2 mile north of its junction with Wentworth Springs Road 1620 Comment
  UCR230638  Madia subspicata George K. Helmkamp, E. A. Helmkamp 2011-5-26 17379 Nevada Northern Sierra Nevada Mountains Foothills, SE of Grass Valley near Rollins Reservoir dam, along CA-174 NNW of Colfax, just west of the bridge over Bear River 613 Comment
  UCR159853  Malacothamnus jonesii George K. Helmkamp, E. A. Helmkamp 2005-6-12 9626 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR218225  Malacothrix floccifera George K. Helmkamp, E. A. Helmkamp 2010-6-26 16412 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
  UCR121494  Malva nicaeensis George K. Helmkamp, E. A. Helmkamp 1999-6-28 4959 San Mateo Coast Range; Santa Cruz Mtns, Sky Londa; junction of Calif. Hwy 84 and Calif. Hwy 35, 5 mi south of central Redwood City 457 Comment
  UCR207027  Malva nicaeensis George K. Helmkamp, E. A. Helmkamp 2009-5-26 14803 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  UCR205148  Malvella leprosa George K. Helmkamp, E. A. Helmkamp 2008-10-14 14254 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  UCR59842  Malvella leprosa 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
  UCD107633  Marah fabacea G. K. Helmkamp; E. A. Helmkamp 2006-2-24 10067 Placer Sacramento Valley; edge of Sierra Nevada Foothills: Junction of Clark Tunnel Road and CA Highway 193, E of Lincoln. 113 Comment
  SD143890  Marina parryi G. K. Helmkamp, E. Helmkamp 1998-1-24 2610 Imperial Ogilby Road, 14.2 miles south of the junction with Highway California 78; vicinity of Tumco Wash. 182 Comment
  UCR103662  Marina parryi George K. Helmkamp, E. Helmkamp 1998-1-24 2610 Imperial Sonoran (Colorado) Desert, Ogilby Rd, 14.2 mi. south of the junction with Calif. Hwy 78, vicinity of Tumco Wash 183 Comment
  UCR92753  Marina parryi 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
  UCR206379  Marrubium vulgare George K. Helmkamp, E. A. Helmkamp 2009-5-20 14757 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCR233036  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2011-5-12 17260 Sutter Southern Sacramento Valley, along Catlett Road immediately west of the Placer County line, 1.65 mi. NE (20 deg. ) of Pleasant Grove 15 Comment
  UCR237573  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2012-3-3 18594 Sacramento Sacramento Delta/Valley, Twin Cities Road (Co. Rd. E-13) at Sourgrass Slough, NE of Locke 14 Comment
  UCR238440  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2012-4-4 18694 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR257604  Medicago polymorpha George K. Helmkamp, Elizabeth Helmkamp 2014-2-20 22523 Amador Sierra Nevada Mountains Foothills, 2.2 air miles SE (126 deg. ) of Ione, along CA-88, 0.5 mile northeast of its junction with CA-104 172 Comment
  UCR235635  Medicago praecox George K. Helmkamp, E. A. Helmkamp 2012-4-30 18877 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road, 0.3 mile north of the bridge over the South Fork American River 427 Comment
  UCR229422  Melica aristata George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18081 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  CAS-BOT-BC174248  Melica torreyana G. K. Helmkamp; E. A. Helmkamp 2008-4-30 13351 El Dorado Sierra Nevada Mountains Foothills: junction of Meadow Brook and Bear Creek Roads at Traverse Creek, south of Georgetown 674 Comment
  SEINET3817935 Image available Melica torreyana George K. Helmkamp, E. A. Helmkamp 2012-5-5 18915 Placer Northern Sierra Nevada Foothills, Lake Clementine Road, 1.2 miles west of its junction with Foresthill Road, 0.3 air mi SE (123degrees) of Clementine Dam on the American River (Auburn 7.5' Q. 396 Comment
  UCR253573  Melica torreyana George K. Helmkamp, Amy Barnes 2014-4-23 22799 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
  UCD108009  Melilotus albus G. 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
  UCR188498  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2007-9-26 13019 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 2.3 miles east of Jenkinson Lake 1226 Comment
  UCR258391  Melilotus officinalis George K. Helmkamp, Amy Barnes 2014-8-27 23036 Alpine Northern Sierra Nevada Mountains, Woodfords, at the junction of CA-88 and CA-89 1723 Comment
  UCR179789  Mentha pulegium George K. Helmkamp, E. A. Helmkamp 2006-10-6 11478 Amador Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49, 1.1 miles south of Plymouth 314 Comment
  UCR218998  Mentha spicata var. spicata George K. Helmkamp, E. A. Helmkamp 2009-10-10 15675 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Patterson Dr. and CA-49 in Diamond Springs 520 Comment
  UCR248422  Mentha spicata var. spicata George K. Helmkamp, Elizabeth Helmkamp 2013-9-13 22291 Amador Northern Sierra Nevada Mountains Foothills, Volcano Road; 0.1 mile northwest of the village of Volcano 671 Comment
  UCR89995  Mentzelia George K. Helmkamp 1995-3-28 s.n. San Bernardino Eastern Mojave Desert, Beside old US hwy 66, 11.5 mi east of Goffs 650 Comment
  UCR103294  Mentzelia involucrata George K. Helmkamp 1998-4-4 3179 Riverside Sonoran (Colorado) Desert, 2.3 mi. north of Hwy I-10 on Eagle Mtn Rd. 274 Comment
  UCR103624  Mentzelia involucrata George K. Helmkamp, E. A. Helmkamp 1998-3-19 2927 Imperial Sonoran (Colorado) Desert, Imperial Dam area, just south of the dam on Hwy S-24. 76 Comment
  UCR37719  Mentzelia involucrata George K. Helmkamp 1984-4-29 A- 4 San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters 701 Comment
  SD148124  Mentzelia montana G. K. Helmkamp, E. A. Helmkamp 2001-7-6 6840 Alpine Sierra Nevada Mountains; Ca 89, 7.1 miles west of U. S. 395. 2470 Comment
  SEINET3094631 Image available Mentzelia multiflora subsp. longiloba George K. Helmkamp, E. A. Helmkamp 1998-3-18 2873 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
  UCR123544  Mentzelia veatchiana George K. Helmkamp, E. A. Helmkamp 2000-4-25 5607 Kern Tehachapi Mountains, Oak Creek Rd., 1.5 mi east of Tehachapi Willow Springs Rd (about due west of Mojave and SE of Tehachapi. 1189 Comment
  UCR176368  Mertensia oblongifolia George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10745 El Dorado Northern Sierra Nevada Mountains, 6.0 miles east of Ice House Road on the road to Wright's Lake 2000 Comment
  UCR206576  Mertensia oblongifolia var. nevadensis George K. Helmkamp, Ann Kerchner 2009-7-25 15282 Amador Sierra Nevada Mountains, south side of CA-88, 3.2 miles west of the Alpine Co. line; near Martin Meadow 2306 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
  UCR104843  Mesembryanthemum nodiflorum George K. Helmkamp 1998-4-4 3097 San Bernardino West Mojave Desert, Dale Lake, 1.8 mi. west of Iron Age Rd & 0.7 mi. north of Calif. hwy 62 366 Comment
  UCR122263  Micropus californicus George K. Helmkamp, E. A. Helmkamp 2002-4-15 7355 Santa Barbara Western Transverse Range, Sierra Madre Mountains, Miranda Pine Road, 1.0 mi southeast of CA Hwy 166 549 Comment
  RSA709322  Micropus californicus var. californicus George K. Helmkamp 2004-4-21 8499 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn. Rd. 412 Comment
  UCR230100  Micropus californicus var. californicus George K. Helmkamp, E. A. Helmkamp 2011-5-19 17289 Amador Lower Sierra Nevada Foothills, NW of Pardee Reservoir, 0.1 mile east of Rock Creek Road on a gravel spur leading to houses, 4.65 mi. SW (220 deg. ) of Jackson 280 Comment
  UCR101018  Microseris lindleyi George K. Helmkamp, E. A. Helmkamp 1998-4-8 3222 San Luis Obispo Elkhorn Grade Rd, 13.7 mi. NW of jct with Calif. Hwy 33, roughly WNW of Maricopa 579 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
  RSA770726  Microseris nutans George K. Helmkamp, E. A. Helmkamp 2009-7-2 15088 El Dorado Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR175640  Microseris nutans George K. Helmkamp, E. A. Helmkamp 2006-7-7 10816 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 3.2 miles north of Hwy US-50, northeast of Kyburz 1982 Comment
  UCR207003  Microseris nutans George K. Helmkamp, E. A. Helmkamp 2009-7-2 15088 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR218109  Microseris nutans George K. Helmkamp, E. A. Helmkamp 2010-7-9 16488 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  UCR257083  Mimulus George K. Helmkamp, Mary Alice Barnes 2013-5-13 20599 Amador Sierra Nevada Mountains, Shake Ridge Road, 16.7 miles northeast of its junction with E-16 via Fiddletown Rd. 983 Comment
  CLARK-A1045-496  Mimulus androsaceus George K. Helmkamp 1979-6-5 #1 San Bernardino San Bernardino Mountains north of Baldwin Lake and State Highway 38 [18?]; sagebrush scrub area; drying flat; ; Big Bear City 7.5'Q 2133 Comment
  SEINET1908460  Mimulus aurantiacus G. K. Helmkamp, E. A. Helmkamp 2008-1 13612 El Dorado Sierra Nevada Mountains Foothills: Forbay Road. 0.5 mile north of its crossing of the South Fork American River. 668 Comment
  UCR179327  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2006-10-10 11506 Nevada Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 49, 10.4 miles north of the crossing of the South Yuba River 543 Comment
  UCR195166  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2007-5-26 12098 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
  UCR233243  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 2011-7-9 17688 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 10.8 miles southeast of its junction with Foresthill Road 503 Comment
  UCR160286  Mimulus aurantiacus var. aurantiacus George K. Helmkamp 2004-5-23 8584 Santa Barbara Southern Central Coast, Lompoc-Casmalia Rd, 1.4 mi south of the junction to Casmalia 183 Comment
  UCR236984  Mimulus bicolor George K. Helmkamp, E. A. Helmkamp 2012-5-22 19055 El Dorado Northern Sierra Nevada Mountains, Forest Service Road 31 (Peavine Ridge Road), 1.3 miles wet of its junction with Ice House Canyon Road 1582 Comment
  UCR90222  Mimulus bigelovii 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
  UCR13808  Mimulus bigelovii var. cuspidatus George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  RSA0012226  Mimulus breweri George K. Helmkamp, E. A. Helmkamp 2011-7-19 17827 -A Tuolumne Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River. 1367 Comment
  UCR245563  Mimulus cardinalis George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22257 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Markleeville 1691 Comment
  UCR197241  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2008-4-25 13330 El Dorado Sierra Nevada Mountains Foothills, along Bear Creek Road 0.4 mile southeast of its junction with Meadow Brook Road, SE of Georgetown 747 Comment
  UCR257816  Mimulus guttatus George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19445 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
  UCR230714  Mimulus jepsonii George K. Helmkamp, E. A. Helmkamp 2011-7-19 17828 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR103541  Mimulus mephiticus George K. Helmkamp, E. A. Helmkamp 1997-9-12 2405 Mono Along Calif. Hwy 120, 7.5 mi east of US Hwy 395 2125 Comment
  UCR253109  Mimulus mephiticus George K. Helmkamp, Elizabeth Helmkamp 2013-7-31 22057 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
  RSA725803  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2006-8-14 11233 Nevada Northern Sierra Nevada Mtns.: just south of I-80 on Lake Valley Rd 535 Comment
  SEINET4691385  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2010-1 16812 El Dorado Northern Sierra Nevada Mountains: Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring area. 2232 Comment
  UCD122813  Mimulus moschatus G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12605 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20. 1793 Comment
  UCR206766  Mimulus moschatus George K. Helmkamp, Amy Barnes 2009-7-7 15119 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, c. 1.3 miles north of Ice House Store 1660 Comment
  UCR206777  Mimulus moschatus George K. Helmkamp, Amy Barnes 2009-7-8 15136 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, about 1.3 miles north of Ice House 1654 Comment
  CLARK-A1045-1156  Mimulus nasutus George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 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
  UCR87686  Mimulus pilosus George K. Helmkamp, E. A. Helmkamp 1995-6-21 95-1- Mariposa Sierra Nevada Mtns., above Merced River arm of Lake McClure along Calif. Hwy 40, 0.75 mi north of the crossing at Hell Hollow 381 Comment
  UCR197321  Mimulus primuloides var. primuloides George K. Helmkamp, E. A. Helmkamp 2008-7-11 13772 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
  UCR215784  Mimulus tilingii George K. Helmkamp, E. A. Helmkamp 2009-7-30 15349 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  RSA0012159  Mimulus viscidus George K. Helmkamp, E. A. Helmkamp 2011-7-7 17667 El Dorado Capps Crossing Road, 5.2 miles south of its junction with Mormon Emigrant Trail 1409 Comment
  UCR233190B  Mimulus viscidus George K. Helmkamp, E. A. Helmkamp 2011-7-7 17667 El Dorado Northern Sierra Nevada Mountains, Capps Crossing Road, 5.2 miles south of its junction with Mormon Emigrant Trail 1409 Comment
  CLARK-A1045-767  Mirabilis bigelovii var. retrorsa George K. Helmkamp 1977-11-5 San Bernardino Morongo Valley at north edge of Morongo Valley beside State Highway 62; creosote bush scrub; Morongo Valley 7.5'Q Comment
  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
  UCR171539  Monardella breweri subsp. lanceolata George K. Helmkamp, E. A. Helmkamp 2005-7-31 9724 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR233199  Monardella breweri subsp. lanceolata George K. Helmkamp, E. A. Helmkamp 2011-7-17 17758 Nevada Northern Sierra Nevada Mountains Foothills, You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg. ) of Peardale 686 Comment
  RSA794590  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2010-8-26 16833 Nevada South Fork Yuba River, Forest Route 85 (Fordyce Lake Rd) north of Hampshire Rocks Road and I-80, 1 mi. NNW (351 deg.) of Cisco. 1634 Comment
  SD243166  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2011-8-26 18168 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 26.1 miles east of its junction with Mesquite Road in the city of Foresthill. 2020 Comment
  UCR129540  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2001-7-8 6830 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCR176069  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2006-8-14 11244 Nevada Northern Sierra Nevada Mtns, about 0.7 mile east of Donner Pass along Donner Pass Road 2041 Comment
  UCR206786  Monardella odoratissima subsp. pallida George K. Helmkamp, Ann Kerchner 2009-7-25 15302 Alpine Sierra Nevada Mountains, Blue Lakes Road, 8.5 miles south of its junction with CA-88 2491 Comment
  UCR233424  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2011-9-13 18259 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road, 0.6 miles north of its junction with CA-88 2136 Comment
  SD254645  Monardella sheltonii George K Helmkamp, Mary Alice Barnes 2013-5-17 20634 Calaveras Northern Sierra Nevada Mountains Foothills: Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30a^z) of Valley Springs (Valley Springs 7.5'Q) 278 Comment
  UCR206759  Monardella sheltonii George K. Helmkamp, E. A. Helmkamp 2009-6-25 15051 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
  SEINET892710  Monardella villosa var. franciscana G. K. Helmkamp, E. A. Helmkamp 1999-1 4991 San Mateo Pescadero Crk. Watershed: Bean Hollow Rd. 0.3 miles S of Pescadero Rd. (SW of Pescadero). Slopes abov Butano Crk. (Pigeon Pt.) 60 Comment
  UCR51570  Monolepis nuttalliana 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
  UCR97548  Monolopia lanceolata George K. Helmkamp, E. A. Helmkamp 1997-3-8 1415 San Luis Obispo c. 6 mi. west of Soda Lake Rd along Calif. Hwy 58 549 Comment
  SD234498  Montia parvifolia G. K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10556 El Dorado Northern Sierra Nevada foothills: Along Hwy US - 50 at Bridal Veil Falls, east of Pacific House. 1002 Comment
  RSA0011984  Muhlenbergia andina George K. Helmkamp, E. A. Helmkamp 2011-9-1 18229 El Dorado Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  RSA0011987  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2011-8-6 18008 Amador Ellis Road, 0.2 miles south of its junction with CA-88 2009 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
  UCR257775  Muhlenbergia filiformis George K. Helmkamp, Amy Barnes 2012-8-19 19681 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
  CLARK-A1045-175  Muilla maritima George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5' Q 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
  UCR197834  Myosotis laxa George K. Helmkamp, E. A. Helmkamp 2008-7-11 13761 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
  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
  UCR87688  Myosotis scorpioides George K. Helmkamp, E. A. Helmkamp 1995-6-23 95 7 1 Alpine Sierra Nevada Mtns, Bear Valley along Calif. Hwy 4 2134 Comment
  UCR14522  Nama aretioides George K. Helmkamp 1974-5-4 s.n. Inyo Owens Valley, Pleasant Valley along the Owens River, 9 mi NW of Bishop 1311 Comment
  UCR189506  Navarretia breweri George K. Helmkamp, E. A. Helmkamp 2007-8-4 12706 Alpine Northern Sierra Nevada Mountains, Woods Lake Road 0.1 mile south of its junction with CA-88 2500 Comment
  UCR188862  Navarretia divaricata subsp. divaricata George K. Helmkamp, E. A. Helmkamp 2007-7-27 12611 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20 1793 Comment
  UCR233422  Navarretia divaricata subsp. divaricata George K. Helmkamp, E. A. Helmkamp 2011-9-13 18258 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road, 0.6 miles north of its junction with CA-88 2136 Comment
  UCR160571  Navarretia hamata George K. Helmkamp, E. A. Helmkamp 2005-6-7 9552 San Luis Obispo Outer South Coast Ranges, along Arroyo Grande to Huasna Road [beyond Huasna], 2.1 miles ENE of Huasna Township Road 253 Comment
  UCR87682  Navarretia hamata George K. Helmkamp, E. A. Helmkamp 1995-6-20 95- 02 - San Luis Obispo Central Coast, Bear Creek Ranch, 6 miles SE of Los Osos on Clark Valley Road 400 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
  UCR229431  Navarretia squarrosa George K. Helmkamp, E. A. Helmkamp 2011-8-11 18023 El Dorado Northern Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 524 Comment
  CLARK-A1045-267  Nemacladus glanduliferus George K. Helmkamp 1978-3-24 San Bernardino Cady Mountains Afton; rocky flat above Canyon; Cave Mt. 15'Q Comment
  SBBG129331  Nemophila heterophylla G. K. Helmkamp, E. A. Helmkamp 2013-5-24 20680 Calaveras Whiskey Slide Rd, just E of W Murray Crk Rd, ca. 4.7 mi SE of Jesus Maria Rd 677 Comment
  UCD120006  Nemophila heterophylla G. K. Helmkamp; Elizabeth Helmkamp 2006-5-18 10467 El Dorado Northern Sierra Nevada: S side of Peavine Ridge; along Meadow Canyon Road, 3.4 mi. W. of its junction with Ice House Canyon Road (N of US Hwy 50 and SSE of Union Valley Reservoir). 1189 Comment
  UCD120017  Nemophila heterophylla G. K. Helmkamp; E. A. Helmkamp 2007-3-22 11665 El Dorado Northern Sierra Nevada Mountains: Bucks Bar Road, 4.4 miles south of Pleasant Valley Road at the junctions of Sand Ridge road. 628 Comment
  UCR188822  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2007-3-23 11703 El Dorado Foothills, Northern Sierra Nevada Mountains, Rattlesnake Bar Road, 1.4 miles west of CA-49 at Pilot Hill 313 Comment
  SEINET3860283  Nemophila maculata George K. Helmkamp, E. A. Helmkamp 2010-7-23 16587 El Dorado Northern Sierra Nevada Mountains: trailhead at the east end of Wright's Lake, 1.2 miles north of the visitor's center at the lake entrance.; 0 2127 Comment
  UCR122635  Nemophila maculata George K. Helmkamp, E. A. Helmkamp 2002-4-23 7508 Madera Western Sierra Nevada foothills, Bass Lake Road, 2.2 miles southeast of the junction with CA Hwy 41 976 Comment
  UCR217397  Nemophila maculata George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16297 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, just south of Iron Mountain, c. 15 miles southeast of Sly Park Road at Jenkinson Lake 1854 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
  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
  UCR224861  Nemophila pulchella var. fremontii George K. Helmkamp, E. A. Helmkamp 2010-4-23 15911 Placer Sierra Nevada Mountains Foothills, along Salmon Falls Road, at Miners Valley Rd., 4.5 miles south of junction with CA-49 at Pilot Hill 287 Comment
  UCR200923  Nepeta cataria George K. Helmkamp, E. A. Helmkamp 2008-9-9 14090 El Dorado Foothills, northern Sierra Nevada Mountains, Traverse Creek Road at the creek crossing, 1.6 miles east of CA-193 628 Comment
  UCD126685  Nicotiana acuminata var. multiflora G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12983 El Dorado Northern Sierra Nevada Mountains: junction of Lost Creek and French Creek Road just north of Frenchtown. 366 Comment
  UCR232679  Nicotiana acuminata var. multiflora George K. Helmkamp, E. A. Helmkamp 2011-10-15 18428 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCD126712  Nicotiana quadrivalvis G. K. Helmkamp; E. A. Helmkamp 2007-8-19 12777 El Dorado Northern Sierra Nevada Mountains: Lake Oaks Mobile Home Park, Diamond Springs. 521 Comment
  UCR80827  Nitrophila occidentalis George K. Helmkamp 1993-6-16 1- 22 Inyo Owens Valley, 2 mi south of Pleasant Valley campground beside the Owens River 1280 Comment
  UCR231857  Notholithocarpus densiflorus var. echinoides George K. Helmkamp, E. A. Helmkamp 2010-8-11 16762 Placer Northern Sierra Nevada Mountains, Finning Mill Road, 2.3 miles north of Forest Hill Road at the crossing of McBride Creek 1082 Comment
  UCR130381  Oenothera californica George K. Helmkamp, E. A. Helmkamp 1998-5-21 4028 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  UCR101125  Oenothera deltoides George K. Helmkamp, E. A. Helmkamp 1998-2-26 2758 San Bernardino Mojave Desert, East Cronese Dry Lake. 0.2 mi south of I-15 on Basin Rd. 332 Comment
  UCR103650  Oenothera deltoides George K. Helmkamp, E. A. Helmkamp 1998-1-28 2626 Imperial Sonoran (Colorado) Desert, West Mesa. Jeep trail south of Calif. Hwy 98 along the Mexican border, 2.2 mi. west of Mt. Signal Road. 67 Comment
  UCR50963  Oenothera deltoides George K. Helmkamp 1988-2-28 s.n. Imperial Sonoran (Colorado) Desert, just N of Signal Mtn., south of Hwy 98 31 Comment
  UCR100854  Oenothera deltoides var. deltoides George K. Helmkamp, E. A. Helmkamp 1998-3-18 2874 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
  SEINET1908786  Onagraceae G. K. Helmkamp, Elizabeth Helmkamp 2005-1 9456 Monterey Central coast ranges: WNW of Lockwood along Hwy G-14; mile-28 on the road (Jolon 7.5') 329 Comment
  SEINET1004422  Orobanchaceae George K. Helmkamp 2004-1 8284 San Luis Obispo Central Coast: Nipomo Mesa, Willow Rd., 0.6 mi E of Hwy CA-1. 125 Comment
  UCR157783  Osmorhiza brachypoda George K. Helmkamp, E. A. Helmkamp 1998-6-29 4162 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR240888  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19119 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.1 miles west of Cooks Station 1439 Comment
  UCR258380  Osmorhiza chilensis George K. Helmkamp 2014-5-28 22930 Calaveras Northern Sierra Nevada Mountains, along Winton Road along the north side of Wilson Lake 1128 Comment
  UCR190482  Osmorhiza occidentalis George K. Helmkamp, E. A. Helmkamp 2007-8-4 12691 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
  SD178207  Oxalis corniculata G. K. Helmkamp 2004-3-21 8389 San Luis Obispo Central Coast: Mesa Dunes Mobile Home Park along mesa View Dr., 0.2 mi south of the junction of Halcyon Rd., southeast of Oceano. Growing up through garden shrubs. 60 Comment
  UCR235501  Oxalis laxa George K. Helmkamp, E. A. Helmkamp 2012-5-15 18990 Calaveras Northern Sierra Nevada Mountains Foothills, at a crossing of Murray Creek along Murray Creek Road; 1.8 miles east of Pope Road in San Andreas 351 Comment
  CLARK-A1045-71  Oxytheca emarginata George K. Helmkamp 1978-5-20 Riverside San Jacinto Mountains dry slope just northwest of Kensworthy Forest Station; ; Idyllwild 15' Q Comment
  RSA489399  Palafoxia arida var. arida George K. Helmkamp 1988-2-28 s.n. Imperial Sandy flat just N of Signal Mtn., S of Hwy 98. [Mount Signal 10 km cell; PG-1N, 2E 31 Comment
  UCR118320  Palafoxia arida var. arida George K. Helmkamp, E. A. Helmkamp 1998-4-18 3335 San Bernardino Mojave Desert, Basin Road, 2.7 miles south of I-15 (west of Baker). 396 Comment
  UC4506467  Panicum antidotale G. K. Helmkamp, O. F. Clarke and J. Derby 1973-10-16 San Bernardino along Amargosa River (China Ranch, near the Inyo County line); , China RAnch 304 Comment
  RSA328956  Panicum antidotale George K. Helmkamp, Oscar F. Clarke, J. Derby 1973-10-16 s.n. San Bernardino China Ranch along the Amargosa River near the Inyo Co. line 305 Comment
  SD254508  Panicum capillare George K. Helmkamp, Elizabeth Helmkamp 2013-10-15 22430 El Dorado Sierra Nevada Mountains Foothills; Oak Hill Road, 2.9 miles south of its junction with Pleasant Valley Road, ca. 5.0 miles SSE of Placerville. 616 Comment
  UCR219196  Panicum capillare George K. Helmkamp, E. A. Helmkamp 2009-9-22 15647 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  CAS-BOT-BC422843  Papaver rhoeas G. K. Helmkamp; E. A. Helmkamp 2008-5-4 13400 Amador Sierra Nevada Mountains Foothills: along CA-49, 0.1 mile north of Drytown. 200 Comment
  SD260212  Parvisedum pumilum George K. Helmkamp, Mary Alice Barnes 2013-4-24 20409 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 1.9 milse east of its juncton with CA-26 in West Point (West Point 7.5'Q) 651 Comment
  UCR238417  Parvisedum pumilum George K. Helmkamp, E. A. Helmkamp 2012-4-4 18705 Calaveras Northern San Joaquin Valley, along CA-26, 0.1 mile west of its junction with Milton Road, between Linden & Valley Springs 67 Comment
  UCR241347  Paspalum dilatatum George K. Helmkamp, E. A. Helmkamp 2012-9-20 19873 Calaveras Northern Sierra Nevada Mountains Foothills, along Hwy CA-26, 6.2 miles NE of its junction with CA-49 at Mokelumne Hill 550 Comment
  UCR253537  Paspalum dilatatum George K. Helmkamp, Amy Barnes 2013-9-23 22308 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road (beside Angel's Creek), 0.6 mile northeast of its junction with CA-4 974 Comment
  UCR64000  Pectocarya anisocarpa George K. Helmkamp 1984-5-2 D- 29 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 Comment
  UCR122953  Pectocarya heterocarpa George K. Helmkamp, E. A. Helmkamp 2001-3-30 6452 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR130637  Pectocarya penicillata George K. Helmkamp, E. A. Helmkamp 1999-4-15 4644 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
  CLARK-A1045-139  Pectocarya platycarpa George K. Helmkamp 1978-4-1 Riverside Deep Canyon rocky flat by University of California Reserve System Boyd research station; Palm Desert 15'Q Comment
  CLARK-A1045-732  Pectocarya setosa George K. Helmkamp 1978-5-1 San Bernardino Mojave Desert at camp road, north of Ord Mountain; Ord Mts 15'Q Comment
  CLARK-A1045-758  Pectocarya setosa George K. Helmkamp 1977-5-29 San Bernardino Mojave Desert at north edge of Ivanpah Mountains; ; Mescal Range 15'Q 1432 Comment
  SEINET269524 Image available Pellaea andromedifolia G. Helmkamp 1994-5-18 91 -12 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
  SEINET1908675  Pellaea mucronata G. K. Helmkamp, E. A. Helmkamp 2008-1 13609 El Dorado Sierra Nevada Mountains Foothills: Forbay Road 0.5 milw north of its crossing of the South Fork American River (Slate Mountain 7.5') 668 Comment
  UCR163898  Pellaea mucronata subsp. mucronata George K. Helmkamp, E. A. Helmkamp 2005-3-30 9256 San Luis Obispo Outer South Coast Ranges, La Panza Range; Pozo Road, 6.5 mi NE of Hi Mountain Road, [c. 1 mi (airline) SW of Pozo Summit] 665 Comment
  UCR230625  Pellaea mucronata subsp. mucronata George K. Helmkamp, E. A. Helmkamp 2011-5-10 17238 Amador Northern Sierra Nevada Mountains Foothills, along Sutter Creek near Sutter Creek Rd., 2.9 air miles NE (68 deg. ) of town of Sutter Creek 412 Comment
  UCR107900  Pennisetum villosum George K. Helmkamp, E. A. Helmkamp 1996-12-22 1274 San Luis Obispo Central Coast, near Martingale Avenue and Buckskin Drive at the east end of Los Osos 61 Comment
  RSA0093629  Penstemon azureus subsp. angustissimus George K. Helmkamp, E. A. Helmkamp 2012-6-19 19208 Placer Northern Sierra Nevada Mountains Foothills. Mosquito Ridge Road, 2.7 miles south of its junction with Foresthill Road. 820 Comment
  UCR233383  Penstemon azureus var. azureus George K. Helmkamp, E. A. Helmkamp 2011-9-16 18301 Amador Northern Sierra Nevada Mountains Foothills, along CA-26 (Red Corral Rd.), 2.2 miles north of the crossing over North Fork Mokelumne River, 1 mile SSE (159 deg. ) of Pioneer 762 Comment
  UCR160734  Penstemon centranthifolius George K. Helmkamp, E. A. Helmkamp 2005-6-7 9557 San Luis Obispo Outer South Coast Ranges, along Arroyo Grande to Huasna Road [beyond Huasna], 2.1 miles ENE of Huasna Township Road 253 Comment
  UCR257648  Penstemon deustus var. deustus George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19492 Nevada Northern Sierra Nevada Mountains, Stampede Meadows Road, c. 0.65 mile south of the Sierra County line 1738 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
  RSA794532  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-17 17754 Nevada You Bet Road, 2.6 miles east of its junction with CA-174 and at the crossing over Greenhorn Creek, 3.18 miles ESE (95 deg.) of Peardale 686 Comment
  SD241191  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17721 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road (Forest Route 7N03), 12.6 miles east of its junction with CA-26 in West Point (Garnet Hill 7.5'Q) 1502 Comment
  UCR258360  Penstemon laetus subsp. laetus George K. Helmkamp 2014-5-28 22928 Calaveras Northern Sierra Nevada Mountains, along Winton Road along the north side of Wilson Lake 1128 Comment
  SD237626  Penstemon laetus subsp. leptosepalus G. K. Helmkamp, Amy Barnes 2009-7-12 15181 Placer Sierra Nevada Mountains Foothills: along Foresthill Road 10.3 miles northeast of the town of Foresthill (Michigan Bluff 7.5'Q). 1370 Comment
  SD243212  Penstemon neotericus George K. Helmkamp, E. A. Helmkamp 2011-8-26 18190 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
  UCR233462  Penstemon neotericus George K. Helmkamp, E. A. Helmkamp 2011-8-26 18190 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
  UCD124323  Penstemon newberryi var. newberryi G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-10 10693 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 0.2 mile north of its junction with Wentworth Springs Road. 1620 Comment
  CAS-BOT-BC438802  Penstemon roezlii George K. Helmkamp; Elizabeth Helmkamp 2013-7-31 22053 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
  SEINET2441587  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2009-6-3 14898 El Dorado Northern Sierra Nevada Mountains: Forbay Road, 4.7 miles northwest of its junction with Pony Express Trail in Pollock Pines (Slate Mountain 7.5' Q.).; 0 945 Comment
  OBI82261  Penstemon roezlii George K Helmkampf 2013-6-19 20903 El Dorado Northern Sierra Mountains: Mormon Emigrant Trail at the junction with Milliken Road (Leek Spring Hill) ; rocky bank Comment
  UCR121727  Penstemon rostriflorus George K. Helmkamp, E. A. Helmkamp 2000-7-19 5936 Mono Sierra Nevada Mountains, McGee Creek Rd about 4 mi SW of US-395 2470 Comment
  SD241193  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2011-8-13 18065 Alpine Northern Sierra Nevada Mountains: south side of Bear Valley Village, along CA Hwy 4 (Tamarack 7.5'Q) 2168 Comment
  SD247510  Penstemon rydbergii var. oreocharis George K. Helmkamp, Elizabeth A. Helmkamp 2013-7-10 21020 Amador Northern Sierra Nevada Mountains: Plasse Road at the southern end of Silver Lake off CA-88/Carson Pass Hwy (Tragedy Spring 7.5'Q) 2191 Comment
  SEINET3860454  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2010-7-23 16610 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road at the entrance to a camping area, 0.2 mile west of the lake, 5.5 miles NE of Kyburz.; 0 2114 Comment
  UCR189142  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2007-7-17 12552 Alpine Northern Sierra Nevada Mountains, Blue Lake Road about nine miles south of its junction with CA-88 2511 Comment
  UCR201753  Penstemon speciosus George K. Helmkamp, E. A. Helmkamp 2008-8-8 13980 Alpine Northern Sierra Nevada Mountains, along CA-89 at Grass Lake, 0.9 mile west of Luther Pass 2354 Comment
  UCR153898  Penstemon thurberi George K. Helmkamp 1977-5-30 s.n. San Bernardino Eastern Mojave Desert., south base of the Kelso Sand Dunes 671 Comment
  UCR233114B  Pentagramma pallida George K. Helmkamp, E. A. Helmkamp 2010-3-20 15750 El Dorado Sierra Nevada Mountains Foothills, Marshall Road, 0.1 mile NE of its junction with CA-49 226 Comment
  UCR246407  Pentagramma triangularis George K. Helmkamp, E. A. Helmkamp 2012-3-22 18633 Amador Northern Sierra Nevada Mountains Foothills, Bell Road, 1.2 miles east of CA-49 at private road to Rancho Cicada Retreat 371 Comment
  UCD137790  Pentagramma triangularis subsp. triangularis G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11848 Calaveras Northern Sierra Nevada Mountains: Chili Gulch near McSorley Ranch, along Hwy CA-49, 5.1 miles south of the Amador County line. 370 Comment
  UCR107356  Pentagramma triangularis subsp. triangularis George K. Helmkamp, E. A. Helmkamp 1998-5-16 3690 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
  UCR233323  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2011-9-1 18225 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  CLARK-A1045-1179  Perideridia parishii George K. Helmkamp 1977-9-1 VA Alpine Sierra Nevada meadow at edge of sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR14528  Perideridia parishii George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, Owens River, Big Springs 2195 Comment
  CAS-BOT-BC257793  Perideridia parishii subsp. latifolia George K. Helmkamp; E. A. Helmkamp 2010-9-1 16894 El Dorado Northern Sierra Nevada Mountains: Mehrten Springs Road, 0.6 mile north of its junction with CA-88 2018 Comment
  UCR103327  Perityle emoryi George K. Helmkamp 1998-3-30 3041 San Bernardino Mojave Desert, vicinity of Twentynine Palms; Encelia Ave., 1.0 mi. north of Calif. Hwy 62 793 Comment
  CAS-BOT-BC227840  Persicaria punctata George K. Helmkamp; E. A. Helmkamp 2011-9-16 18271 Calaveras Northern Sierra Nevada Mountains Foothills: Bald Mountain Road, 1.5 miles SW of Hunter Creek crossing, 7.3 miles NE of the junction of Blue Mountain Rd and Rail Road Flat Rd 1037 Comment
  CLARK-A1045-877  Petalonyx linearis George K. Helmkamp 1977-3-20 Riverside Deep Canyon UCR Boyd Deep Canyon Reserve; sandy bottom of dry wash; ; ; Palm Desert 15'Q 304 Comment
  SEINET3245950  Petrorhagia dubia G. K. Helmkamp, E. A. Helmkamp 2010-1 15934 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5') 157 Comment
  UCR217875  Petrorhagia dubia George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16130 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 2.9 miles east of its junction with Perry Creek road 1012 Comment
  UCR250606  Petrorhagia dubia George K. Helmkamp, Mary Alice Barnes 2013-4-24 20381 Amador Northern Sierra Nevada Mountains Foothills, Along CA-26 (Red Corral/West Point-Pioneer Rd.), 2.8 miles southeast of its junction with CA-88 905 Comment
  SEINET244289 Image available Phacelia californica G. K. Helmkamp, E. A. Helmkamp 2001-5-30 6737 Santa Clara Santa Clara Valley; Gilroy Hot Springs Rd., 0.5 mi S of springs at Coyote Crk. 183 Comment
  UCR134403  Phacelia californica George K. Helmkamp, E. A. Helmkamp 2001-4-29 6597 San Luis Obispo Irish Hills, Prefumo Cyn Rd., 2.8 miles west of Los Osos Valley Rd., SW of San Luis Obispo 91 Comment
  CLARK-A1045-737  Phacelia campanularia subsp. vasiformis George K. Helmkamp 1978-5-1 San Bernardino Mojave Desert Ord Saddle; Ord Mts 15'Q Comment
  UCR102969  Phacelia campanularia subsp. vasiformis George K. Helmkamp, E. A. Helmkamp 1998-3-16 2825 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-A1045-183  Phacelia cicutaria subsp. hispida George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5'Q Comment
  UC2015602  Phacelia corymbosa G. Helmkamp 1995-9-23 3 -9 Alpine West side of Sonora Pass just beyond the Mono County line Comment
  SEINET3091710 Image available Phacelia crenulata var. ambigua G. Helmkamp, E. Helmkamp 1998-1-17 2541 Riverside Box Canyon Road ENE of Mecca and on the north side of the Coachella Canal. 0 Comment
  UCR120532  Phacelia crenulata var. crenulata George K. Helmkamp, E. A. Helmkamp 2001-3-17 6296 Imperial Sonoran (Colorado) Desert, Ogilby Rd., 15.4 miles south of Calif. Hwy 78 168 Comment
  SD148136  Phacelia distans G. K. Helmkamp, E. A. Helmkamp 2001-5-2 6604 San Luis Obispo La Panza Range: CA-58, 4.5 miles east of Santa Margarita. 334 Comment
  SD185241  Phacelia distans G. K. Helmkamp 1998-4-4 3129 Riverside Junction of CA 62 and CA 177. 456 Comment
  UCR103793  Phacelia distans George K. Helmkamp 1997-3-11 1466 Santa Barbara 32 mi. west of New Cuyama along Calif. Hwy 166 399 Comment
  UCR190648  Phacelia distans George K. Helmkamp, E. A. Helmkamp 2005-3-25 9197 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
  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
  UCR202903  Phacelia douglasii George K. Helmkamp, E. A. Helmkamp 2000-3-15 5334 San Luis Obispo Central Coast, south end of Morro Bay at the west end of Howard St in Los Osos 6 Comment
  UCR130257  Phacelia fremontii George K. Helmkamp, E. A. Helmkamp 2001-4-27 6512 Kern Tehachapi Mtns, Hart Flat turnoff from Calif. Hwy 58 884 Comment
  SD239787  Phacelia hastata var. compacta George K. Helmkamp, Ann Kerchner, Amy Barnes. 2011-8-13 18051 Calaveras Northern Sierra Nevada Mountains: Black Springs Road (Forest Route 6N45?), 1.7 miles north of its junction with CA Hwy 4 (Calaveras Dome 7.5'Q) 2058 Comment
  SEINET4691403  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2010-1 16715 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, 0.4 mile east of its junction with Mormon Emigrant Trial, at Jim Quinn Spring. 2136 Comment
  UCR176393  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2006-8-7 11174 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  UCR230639  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2011-7-19 17853 Calaveras Northern Sierra Nevada Mountains Foothills, CA Hwy 4, 4.2 miles northeast of Arnold 1221 Comment
  UCR248482  Phacelia hastata var. hastata George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 22014 El Dorado Northern Sierra Nevada Mountains, dirt track on the south side of Mormon Emigrant Trail, about 0.1 mi. east of Silver Fork Road 2186 Comment
  UCR233132B  Phacelia hydrophylloides George K. Helmkamp, E. A. Helmkamp 2011-8-6 17993 Amador Northern Sierra Nevada Mountains, Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  RSA0039073  Phacelia imbricata subsp. imbricata George K. Helmkamp, Mary Alice Barnes 2013-4-18 20369 Placer Iowa Hill Road, 1.8 miles west of the bridge over North Fork American River, 0.6 mi. (airline) east of I-80 at Colfax 544 Comment
  SEINET2441256  Phacelia imbricata subsp. imbricata George K. Helmkamp, E. A. Helmkamp 2010-5-14 16022 El Dorado Sierra Nevada Mountains Foothills: along CA-16 (Mt. Aukum Rd.), 1.8 miles northeast of Somerset. (Camino 7.5' Q.). 567 Comment
  UCD120621  Phacelia imbricata subsp. imbricata G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10591 El Dorado Northern Sierra Nevada: along Hwy US-50, 0.6 mile east of White Hall. 1055 Comment
  UCR250361  Phacelia imbricata subsp. imbricata George K. Helmkamp, Mary Alice Barnes 2013-4-18 20369 Placer Northern Sierra Nevada Mtns Foothills, Iowa Hill Road, 1.8 miles west of the bridge over North Fork American River, 0.6 mi. (airline) east of I-80 at Colfax 544 Comment
  CAS-BOT-BC228557  Phacelia mutabilis George K. Helmkamp; E. A. Helmkamp 2011-7-19 17805 Tuolumne Northern Sierra Nevada Mountains Foothills: Forest Route 5N14, 1.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1143 Comment
  SD243162  Phacelia mutabilis George K. Helmkamp, E. A. Helmkamp 2010-8-20 16806 El Dorado Northern Sierra Nevada Mountains: Foster Meadow Road 0.6 mile west of Mormon Emigrant Trail in the Leek Spring Area. Roadside bank. 2232 Comment
  UCR233398  Phacelia mutabilis George K. Helmkamp, E. A. Helmkamp 2011-8-26 18175 Placer Northern Sierra Nevada Mountains, Robinson Flat, 0.1 mile south of the campground at Forest Hill Road 2061 Comment
  CLARK-A1045-872  Phacelia pachyphylla George K. Helmkamp 1978-6-1 #3 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  UCR233399  Phacelia racemosa George K. Helmkamp, E. A. Helmkamp 2011-8-26 18174 Placer Northern Sierra Nevada Mountains, Robinson Flat, 0.1 mile south of the campground at Forest Hill Road 2061 Comment
  IRVC29051  Phacelia ramosissima var. montereyensis G. K. Helmkamp 2003-10-8 8193 San Luis Obispo base of Nipomo Mesa 0.25 mi SW of Halcyon Rd along an unnamed road near the railroad crossing Central Coast 15 Comment
  UCR160146  Phacelia ramosissima var. ramosissima George K. Helmkamp, E. A. Helmkamp 2005-6-9 9573 San Luis Obispo South Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 7.8 miles northeast of Huasna Townsite Road 338 Comment
  SD148132  Phacelia tanacetifolia G. K. Helmkamp, E. A. Helmkamp 2001-5-2 6654 Kern Temblor Range: CA-58, very near the San Luis Obispo County line. 427 Comment
  SD227705  Phalaris aquatica G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3743 San Mateo Portola Valley: Golden Hills Rd along Los Trancos Creek 106 Comment
  SD254512  Phalaris paradoxa George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20227 San Joaquin East end of San Joaquin Valley: Escalon Bellota Road (J6), 6.1 miles south of its juction with CA-26, 0.52 mile south of Copperopolis Rd. 52 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
  UCR206713  Philadelphus lewisii George K. Helmkamp, Amy Barnes 2009-7-7 15110 El Dorado Sierra Nevada Mountains Foothills, Forbay Road, at the south side of its crossing of the South Fork American River, about 7 miles north of Pollock Pines 595 Comment
  UCR206758  Philadelphus lewisii George K. Helmkamp, E. A. Helmkamp 2009-6-25 15052 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
  UCR121451  Phlox diffusa George K. Helmkamp, E. A. Helmkamp 1999-6-30 5076 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  UCR129517  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 1998-5-20 4017 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
  UCR166280  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 1995-6-22 95-4- 19 Calaveras Sierra Nevada Mtns, along Calif. Hwy 4, 2.5 mi NE of Arnold 1479 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
  UCR161290  Pholistoma auritum var. auritum George K. Helmkamp, E. A. Helmkamp 2005-3-9 9089 San Luis Obispo Outer Central Coast Hills, Irish Hills; See Canyon, 1.0 mi N of San Luis Bay Drive 43 Comment
  UCR101019  Pholistoma membranaceum George K. Helmkamp, E. A. Helmkamp 1998-4-8 3221 San Luis Obispo Elkhorn Grade Rd, 13.7 mi. NW of jct with Calif. Hwy 33, roughly WNW of Maricopa 579 Comment
  HSC79285  Phoradendron californicum G. K. Helmkamp 1984-5-2 - 11 Riverside Big Morongo Canyon, 3-3.5 mi. below the caretaker's house at the Big Morongo Preserve, Little San Bernardino Mtns. 550 Comment
  VVC513  Phoradendron macrophyllum G. K. Helmkamp 1995-11-4 s.n. San Bernardino Little San Bernardino Mountains, Big Morongo Preserve in Big Morongo Canyon, S of town of Morongo Valley. 780 Comment
  UCR219646  Phyllodoce breweri George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16586 El Dorado Northern Sierra Nevada Mountains, southernmost point of Wright's Lake, 5.6 mi. NE (33 deg. ) of Kyburz 2085 Comment
  UCR100880  Physalis crassifolia George K. Helmkamp, E. A. Helmkamp 1998-2-18 2692 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  UCR102928  Physalis crassifolia George K. Helmkamp, E. A. Helmkamp 1998-2-5 2670 Riverside Little San Bernardino Mtns., 3.2 mi. north of junction of Thousand Palms Canyon Road and Dillon Road. 457 Comment
  UCR103579  Physalis crassifolia George K. Helmkamp, E. A. Helmkamp 1998-1-17 2549 Riverside Sonoran (Colorado) Desert, Mecca Hills, Box Canyon Road ENE of Mecca and on the north side of the Coachella Canal .3 Comment
  SD243193  Physocarpus capitatus George K. Helmkamp 2010-10-16 17030 Placer Northern Sierra Nevada Mountains Foothills: along Forest Route 24 at Parker Flat and beside Forbes Creek, 1.9 miles east (airline) of the Sugar Pine Reservoir dam. 1180 Comment
  HSC101346  Pinus contorta subsp. murrayana G. K. Helmkamp, E. A. Helmkamp 2009-11-5 15732 El Dorado Sierra Nevada Mountains Foothills: Lake Oaks Mobile Home Park, Diamond Springs, south of the junction of Patterson Dr. and Pleasant Valley Rd. 523 Comment
  SD237236  Pinus contorta subsp. murrayana G. K. Helmkamp, E. A. Helmkamp 2006-9-12 11390 Alpine Northern Sierra Nevada Mountains: along Calif. Hwy 89, 1.5 miles east of the El Dorado County line, general vicinity of Luther Pass. 2186 Comment
  SD234731  Pinus jeffreyi G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13905 Alpine Eastern Sierra Nevada Mountains: junction of CA-88/89 and entrance to Crystal Springs campground, 1.2 miles southwest of Woodfords. 1829 Comment
  UCR194690  Pinus jeffreyi George K. Helmkamp, E. A. Helmkamp 2007-5-31 12224 B El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, north of US-50 at the Lyon's Creek trailhead and creek crossing 2058 Comment
  UCR171198  Pinus ponderosa George K. Helmkamp, E. A. Helmkamp 2006-2-7 10055 El Dorado Northern Sierra Nevada Foothills, [NNW of Coloma] California State Park, Coloma, beside South Fork of the American River 221 Comment
  UCR172636  Pinus sabiniana George K. Helmkamp, Elizabeth Helmkamp 2006-4-21 10211 El Dorado Northern Sierra Nevada Foothills, Corner of Pleasant Valley Road and Patterson Drive, W end of Diamond Springs 537 Comment
  UCR218239  Piperia elongata George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16440 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.3 miles SE of its junction with Canyon Way in Colfax 418 Comment
  UCR91849  Piptatherum miliaceum George K. Helmkamp 1996-5-24 1014 San Luis Obispo Central Coast, Baywood Park/Los Osos, state park system, north of Turri Road and 1.5 miles east of South Bay Blvd 94 Comment
  UCR188024  Pityrogramma triangularis var. triangularis George K. Helmkamp, E. A. Helmkamp 2007-4-30 11904 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR257538  Plagiobothrys fulvus var. campestris George K. Helmkamp 2014-4-17 22768 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
  RSA0115337  Plagiobothrys greenei George K. Helmkamp, E. A. Helmkamp 2011-4-10 17167 Yuba Sacramento Valley: along Camp Beale Highway/Spenceville Rd., c. 1.75 miles northeast of Wheatland. 44 Comment
  UCR51564  Plagiobothrys hispidulus 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
  SEINET3828558  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2012-1 18789 Amador Northern Sierra Nevada Mountains Foothills: Bunker Hill Road at the junction with N. Amador Road, c. 0.5 mi N of Amador City. 7.5 299 Comment
  UCR121526  Plagiobothrys nothofulvus George K. Helmkamp 2002-4-21 7483 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 11.2 mi east of Cambria 396 Comment
  UCR161805  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2005-3-14 9146 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  UCR235283  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2012-4-19 18795 Amador Northern Sierra Nevada Mountains Foothills, Bunker Hill Road at the junction with Fremont Mine Road, just north of Amador City 311 Comment
  UCR253470  Plagiobothrys nothofulvus George K. Helmkamp 2014-4-5 22674 Amador Eastern San Joaquin Valley, Sutter Creek-Ione Road, 1.2 miles south of its junction with CA-124 197 Comment
  SBBG128872  Plagiobothrys nothofulvus G. K. Helmkamp, E. A. Helmkamp 2012-3-9 18618 El Dorado Tierra de Dios Drive, 0.4 mi WNW of its jct with Country Club Drive, N of Hwy 50 near Cameron Park 372 Comment
  RSA0107418  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, Amy Barnes 2013-3-28 20250 Yuba Eastern Sacramento Valley: northbound exit road from CA-65, connecting with Forty Mile Road. 30 Comment
  SEINET3287497 Image available Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2009-3-11 14359 Colusa Sacramento Valley; along CA-20, 1.6 miles southwest of Colusa and just north of Colusa National Wildlife Refuge. 15 Comment
  CLARK-A1045-190  Plagiobothrys tenellus George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains Southern Oak Woodland; Wildomar 7.5'Q 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
  CLARK-A1045-153  Plagiobothrys undulatus George K. Helmkamp 1978-6-1 Riverside Santa Ana Mountains vernal pools near origin of creek; Wildomar 7.5'Q Comment
  RSA709324  Plantago coronopus George K. Helmkamp 2004-5-9 8569 Santa Barbara South of Guadalupe along Hwy CA-1, 0.2 mi S of Brown Rd. 46 Comment
  UCR131095  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 1999-5-22 4908 San Luis Obispo Central Coast, Los Osos; north of the corner of Buckskin Dr. & Martingale Ave. 61 Comment
  UCR170423  Plantago lanceolata George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10019 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
  UCR240946  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 2012-9-25 19898 Placer Northern Sierra Nevada Mountains, junction of Blue Canyon Road and Putt Road, just south of I-80, west of Emigrant Gap 1634 Comment
  UCR61724  Plantago lanceolata George K. Helmkamp 1990-4-1 s.n. San Luis Obispo West Cuesta Ridge, c. 3 mi west of US Hwy 101 671 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
  UCR122965  Plantago ovata George K. Helmkamp, E. A. Helmkamp 2001-3-30 6448 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR29821  Plantago ovata George K. Helmkamp 1983-3-24 383- 17 Riverside Sonoran (Colorado) Desert, north base of the Little Chuckwalla Mountains, 1.5 miles east of Graham Pass Road 336 Comment
  UCR123924  Platanthera dilatata var. leucostachys George K. Helmkamp, E. A. Helmkamp 2001-7-8 6960 Trinity North Coast Range; Trinity Mountains, Calif. Hwy 36, 7 mi west of Wildwood at Telephone Ridge 1280 Comment
  UCR190316  Platanthera dilatata var. leucostachys George K. Helmkamp, E. A. Helmkamp 2007-8-21 12782 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 21.3 miles north of CA-50 at Robbs Hut Road 2078 Comment
  UCR234561  Platanthera dilatata var. leucostachys George K. Helmkamp, E. A. Helmkamp 2011-8-19 18149 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 2.6 miles north of its junction with Tamarack Road 2436 Comment
  SD240799  Platanthera sparsiflora George K. Helmkamp, E. A. Helmkamp 2012-7-14 19414 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 (Tragedy Spring 7.5'Q) 2421 Comment
  UCR237443  Platanthera sparsiflora George K. Helmkamp, E. A. Helmkamp 2012-7-14 19414 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
  UCR194922  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2007-5-27 12170 El Dorado Northern Sierra Nevada Mountains Foothills, 0.7 mile down a hiking trail northeast of CA-49; trail starting 3.5 miles northwest of Placerville 430 Comment
  UCR197413  Plectritis brachystemon George K. Helmkamp, E. A. Helmkamp 2008-3-18 13198 Calaveras Sierra Nevada Mountains Foothills, along CA-49 at the crossing of the North Fork of the Calaveras river; 8.3 miles south of Mokelumne Hill 235 Comment
  CDA36251  Plectritis ciliosa subsp. ciliosa G. 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. Comment
  UCR235693  Poa George K. Helmkamp, E. A. Helmkamp 2012-5-5 18918 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
  SBBG128818  Poa annua G. K. Helmkamp, E. A. Helmkamp 2012-2-3 18519 Stanislaus junction of Sonora Rd and Milton Rd, 17 km NE (50 deg) of Escalon 58 Comment
  SD144114  Poa annua G. Helmkamp 1997-2-1 1295 Imperial Southwest of Niland, along Sinclair Road, just east of Hatfield Road, common in mud beside irrigation ditch; -54 Comment
  SEINET3258006 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2007-3-22 11671 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
  SEINET3287538 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2009-1-31 14322 Colusa Sacramento Valley; Jameson Road 1.3 miles north of its junction with Lurline Road and south of Harbison Road, generally west of the city of Colusa. 16 Comment
  SEINET3411984 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2012-2-9 18535 Colusa Sacramento Valley: River Road, 7.1 miles N of Colusa; east side of Sacramento River 18 Comment
  SEINET3821623 Image available Poa annua George K. Helmkamp, E. A. Helmkamp 2010-3-26 15782 Sacramento Southern Sacramento Valley, Pony Brown Road, 0.7 mile east of its junction with Ione Road, 2.3 miles NW (338 degrees) of Eagle's Nest Airport (Carbondale 7.5' Q) 81 Comment
  UCR249938  Poa annua George K. Helmkamp 2013-3-14 20189 Calaveras San Joaquin Valley/Sierra Nevada Foothills, Jenny Lind Road (County Road J14) 0.1 mile north of its junction with Kirby Road, 24 mi. NE of Stockton 91 Comment
  SEINET3123352 Image available Poa bolanderi George K. Helmkamp, E. A. Helmkamp 2008-7-16 13801 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR176447  Poa bolanderi George K. Helmkamp, E. A. Helmkamp 2006-7-10 10880 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
  RSA748987  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2007-4-27 11870 El Dorado junction of Ice House Road and White Meadows Road, about 2 miles northwest of US-50 1029 Comment
  SD197635  Poa bulbosa G. K. Helmkamp, E. A. Helmkamp 2008-5-4 13386 Amador Sierra Nevada Mountains Foothills: along Tiger Creek Road, 2.8 miles east of CA-88; at the entrance of Tiger Creek Reservoir. 744 Comment
  UCR197832  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2008-6-9 13620 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
  UCR208266  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2009-5-7 14647 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.9 miles east of its junction with Forest Hill Road in Foresthill 476 Comment
  UCR240889  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2012-6-6 19120 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.1 miles west of Cooks Station 1439 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
  UCR235629  Poa infirma George K. Helmkamp, E. A. Helmkamp 2012-4-27 18865 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
  UCR171399  Poa leptocoma subsp. leptocoma George K. Helmkamp, E. A. Helmkamp 2005-9-30 9968 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
  CLARK-A1045-434  Poa pratensis George K. Helmkamp 1979-6-29 San Bernardino San Bernardino Mountains north shore of Lake, .5 mile west of Forest Service Station; ; Fawnskin 7.5'Q 2133 Comment
  UCR190649  Poa secunda George K. Helmkamp, E. A. Helmkamp 2005-3-25 9217 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
  UCR257709  Poa secunda var. secunda George K. Helmkamp, Mary Alice Barnes 2013-4-30 20437 El Dorado Sierra Nevada Mountains, Mormon Emigrant Trail, 70 meters northwest of its junction with Park Creek Road, 1 mile NW of Bryants 1311 Comment
  UCR216924  Pogogyne ziziphoroides George K. Helmkamp, E. A. Helmkamp 2010-5-4 15954 A 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
  UCR219153  Polygala cornuta var. cornuta George K. Helmkamp, E. A. Helmkamp 2009-10-3 15665 El Dorado Sierra Nevada Mountains, junction of Capps Crossing Rd (Bonetti Rd on road sign) and Mormon Emigrant Trail; 3.6 miles east of Sly Park Road at Jenkinson Lake 1227 Comment
  CAS-BOT-BC133214  Polygonum G. K. Helmkamp; E. A. Helmkamp 2009-9-13 15608 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
  SD247488  Polygonum aviculare George K. Helmkamp, Elizabeth Helmkamp 2012-9-7 22281 Amador Northern Sierra Nevada Mountains: on the south side of CA-88/Carson Pass Hwy, c. 0.3 mile west of the junction with Bear River Reservoir Road (Peddler Hill 7.5'Q) 1933 Comment
  SEINET3828546  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2011-1 18485 Sutter Sacramento Valley: Garden Hwy at the southwest end of the village of Nicolaus (Nicolaus 7.5') 18 Comment
  RSA750450  Polygonum bistortoides George K. Helmkamp, E. A. Helmkamp 2008-8-1 13953 El Dorado Dark Lake 0.4 mile northwest of the entrance to Wright's Lake along Wright's Lake Road. 2148 Comment
  UCR206587  Polygonum douglasii subsp. douglasii George K. Helmkamp, Ann Kerchner 2009-7-25 15288 Amador Sierra Nevada Mountains, south side of CA-88, 3.2 miles west of the Alpine Co. line; near Martin Meadow 2306 Comment
  RSA715234  Polygonum hydropiper George K. Helmkamp, E. A. Helmkamp 2005-9-12 9865 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, Sly Park road (County Hwy E-16) 2 miles E of Pleasant Valley. 854 Comment
  UCR232641  Polygonum hydropiperoides George K. Helmkamp, E. A. Helmkamp 2011-10-13 18410 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 8.1 miles northwest of Pollock Pines at the south side of the bridge over the South Fork American River 611 Comment
  UCR122370  Polygonum paronychia George K. Helmkamp, E. A. Helmkamp 2001-7-8 7018 Humboldt North Coast, Samoa Peninsula, 2.6 miles south of CA Hwy 255 bridge across Humboldt Bay 15 Comment
  UCR253808  Polygonum persicaria George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20107 Placer Sacramento Valley, north of William Lane on an unnamed levee road to Markham Ravine 35 Comment
  UCR218253  Polygonum phytolaccifolium George K. Helmkamp, E. A. Helmkamp 2010-7-23 16599 El Dorado Northern Sierra Nevada Mountains, trailhead at the east end of Wright's Lake, 1.2 miles north of the visitor's center at the lake entrance 2127 Comment
  UCR131833  Polygonum punctatum George K. Helmkamp 2003-10-8 8192 San Luis Obispo Central Coast, base of Nipomo Mesa 0.25 mi SW of Halcyon Rd along an unnamed road near the railroad crossing 15 Comment
  UCR201765  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14218 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  UCR207867  Polypodium calirhiza George K. Helmkamp, E. A. Helmkamp 2009-5-14 14695 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCR235628  Polypodium glycyrrhiza George K. Helmkamp, E. A. Helmkamp 2012-4-27 18867 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
  UCR191082  Polystichum imbricans subsp. curtum George K. Helmkamp, E. A. Helmkamp 2007-6-8 12297 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 2.0 miles south of Mormon Emigrant Trail 1189 Comment
  UCR191111  Polystichum imbricans subsp. curtum George K. Helmkamp, E. A. Helmkamp 2007-8-29 12824 Yuba Northern Sierra Nevada Mountains Foothills, Mountain House Road 0.6 mile west of the Sierra Co. line; Sleighville area beside Willow Creek 1021 Comment
  OBI45895  Porophyllum gracile G. Helmkamp 1986-10-18 s.n. San Bernardino Whipple Mts, along Havasu Palms Rd ca 3 mi NW of Black Meadow Landing Rd (T3N, R26E, NW1/4 sec 21) 396 Comment
  UCR171336  Potentilla glandulosa George K. Helmkamp, E. A. Helmkamp 2005-10-1 9978 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
  UCR198492  Potentilla glandulosa George K. Helmkamp, E. A. Helmkamp 2008-5-4 13390 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  RSA756978  Potentilla glandulosa subsp. ashlandica George K. Helmkamp, Amy Barnes 2009-7-8 15122 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
  UCR197530  Potentilla glandulosa subsp. ashlandica George K. Helmkamp, E. A. Helmkamp 2008-5-8 13410 Calaveras Sierra Nevada Mountains Foothills, along CA-26, 1.7 miles northeast of Glencoe 674 Comment
  UCR194962  Potentilla glandulosa subsp. glandulosa George K. Helmkamp, E. A. Helmkamp 2007-5-18 12005 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 2.8 miles southeast of Foresthill 814 Comment
  UCR218285  Potentilla glandulosa subsp. nevadensis George K. Helmkamp, E. A. Helmkamp 2010-7-9 16480 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  SEINET11261876  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2012-4-30 18881 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
  UCR233181B  Potentilla glandulosa subsp. reflexa George K. Helmkamp, E. A. Helmkamp 2011-7-7 17660 El Dorado Northern Sierra Nevada Mountains, Capps Crossing Road, 5.2 miles south of its junction with Mormon Emigrant Trail 1409 Comment
  UCD113890  Potentilla gracilis var. elmeri G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11140 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-BC228596  Potentilla gracilis var. fastigiata George K. Helmkamp; William Barnes 2010-9-4 16938 El Dorado Northern Sierra Nevada Mountains: Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  UCR176533  Potentilla gracilis var. fastigiata George K. Helmkamp, E. A. Helmkamp 2006-8-14 11231 Nevada Northern Sierra Nevada Mtns, just south of I-80 on Lake Valley Rd 1755 Comment
  UCR189651  Potentilla gracilis var. fastigiata George K. Helmkamp 2007-7-7 12492 Alpine Northern Sierra Nevada Mountains, Blue Lakes [Forestdale] Road, 0.2 mile south of its junction with CA-88 2378 Comment
  CAS-BOT-BC226234  Poterium sanguisorba G. K. Helmkamp; E. A. Helmkamp 2011-5-26 17393 Nevada Northern Sierra Nevada Mountains Foothills: SE of Grass Valley, 0.2 mile south of CA-174 at the junction of Meadow View Road and Peardale Road 834 Comment
  CHSC118021  Poterium sanguisorba G. K Helmkamp; E. A Helmkamp 2007-9-14 12959 Placer Foothills, northern Sierra Nevada Mountains: along Mosquito Ridge Road 0.4 mile east of Foresthill. 942 Comment
  UCD113976  Poterium sanguisorba G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10372 Nevada Northern Sierra Nevada Mtns.: Cedarsong Road, 0.1 mi. NE of CA Hwy 49 (NW of Nevada City). 637 Comment
  UCR121513  Prunella vulgaris George K. Helmkamp, E. A. Helmkamp 2000-6-19 5785 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 Comment
  UCR170463  Prunella vulgaris George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10017 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
  UCR178644  Prunella vulgaris subsp. lanceolata George K. Helmkamp, E. A. Helmkamp 2006-9-7 11358 El Dorado Northern Sierra Nevada Mountains, Ice House Road. Robbs Valley near Robbs Hut junction 1720 Comment
  RSA0093562  Prunella vulgaris var. lanceolata George K. Helmkamp, Elizabeth Helmkamp 2013-10-14 22418 Placer Sierra Nevada Mountains Foothills. Yankee Jim Road, 3.6 miles northwest of its junction with Foresthill Road. 651 Comment
  UCR253108  Prunella vulgaris var. lanceolata George K. Helmkamp, Elizabeth Helmkamp 2013-7-31 22058 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
  UCR258206  Prunella vulgaris var. lanceolata George K. Helmkamp, Amy Barnes 2014-7-28 22977 El Dorado Northern Sierra Nevada Mountains, at the junction of Wentworth Springs Road and Ice House Road 1412 Comment
  SEINET7224575 Image available Prunus avium George K. Helmkamp, E. A. Helmkamp 2010-6-10 16264 El Dorado Sierra Nevada Mountains foothills: Forni Road, on the southwest side of the bridge over Weber Creek, 1.5 air miles NW (331d) of Diamond Springs 479 Comment
  UCD113205  Prunus emarginata G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11054 El Dorado Northern Sierra Nevada Mountains; along Wright's Lake Road (Forestry Route 4), 3.3 miles north of Highway US-50. 2049 Comment
  UCR173446  Prunus emarginata George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10545 El Dorado Northern Sierra Nevada Mountains, El Dorado National Forest; south of Union Valley Reservoir, c. 2 air mi. N of US Hwy 50; junction of Ice House Canyon Road and Granite Springs Road 1610 Comment
  UCR218440  Prunus emarginata George K. Helmkamp, E. A. Helmkamp 2010-7-9 16481 El Dorado Northern Sierra Nevada Mountains, Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  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
  UCR257063  Pseudognaphalium californicum George K. Helmkamp, Mary Alice Barnes 2013-5-17 20621 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
  UCR258191  Pseudognaphalium luteoalbum George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20031 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
  SD148240  Pseudognaphalium stramineum G. K. Helmkamp, E. A. Helmkamp 2001-7-8 7013 Humboldt Samoa Peninsula, 2.6 miles south of California Highway 255, bridge across Humboldt Bay. 14 Comment
  CAS-BOT-BC126748  Pseudotsuga menziesii var. menziesii G. K. Helmkamp; Mary Alice Barnes; Mary Jane Ganibe 2010-7-6 16467 El Dorado Sierra Nevada Mountains: Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  RSA785387  Pseudotsuga menziesii var. menziesii George K. Helmkamp, Mary Alice Barnes, Mary Jane Ganibe 2010-7-6 16467 El Dorado Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  CLARK-A1045-611  Psilostrophe cooperi George K. Helmkamp 1977-5-29 San Bernardino Clark Mountain 5 miles north of Interstate Highway 15, off of Cima Road; west edge of Clark Mountain, along power line road; Clark Mt. 15'Q Comment
  UCR201542  Psoralea physodes George K. Helmkamp, E. A. Helmkamp 2008-9-28 14164 Amador Foothills, northern Sierra Nevada Mountains, Sutter Creek Rancho Road on the north side of CA-88 and 4.2 miles southwest of the junction of CA-88 and CA-49 287 Comment
  SEINET9261503  Pteridium aquilinum subsp. pubescens George K. Helmkamp, Amy Barnes 2013-1 22319 Alpine Northern Sierra Nevada Mountains: northern edge of Mosquito Lake along CA-4/Ebbetts Pass road (Pacific Valley 7.5' Q) 2454 Comment
  RSA749766  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2009-6-10 14936 Shasta Alvord Road, 0.2 mile south of its junction with CA-44, junction is 1.1 miles east of Shingletown 938 Comment
  UCD136171  Pteridium aquilinum var. pubescens G. K. Helmkamp; E. A. Helmkamp 2007-5-7 11944 El Dorado Northern Sierra Nevada Mountains: Pedro Hills Road, 0.3 mile west of the junction with CA-49, junction 5.3 miles south of Cool. 299 Comment
  UCR206005  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2009-6-10 14936 Shasta Southern Cascade Range, Alvord Road, 0.2 mile south of its junction with CA-44, junction is 1.1 miles east of Shingletown 938 Comment
  UCR207664  Pterostegia drymarioides George K. Helmkamp, E. A. Helmkamp 2009-4-21 14534 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR79300  Purshia glandulosa George K. Helmkamp 1993-9-22 32- 02 San Bernardino San Bernardino Mtns./Mojave Desert, 5.9 mi up Burns Canyon from crossing of Pioneertown and Pipes Canyon Roads 1585 Comment
  UCR197314  Purshia tridentata var. tridentata George K. Helmkamp, E. A. Helmkamp 2008-7-11 13780 El Dorado Northern Sierra Nevada Mountains, north side of CA-88, 2.1 miles northeast of the junction with Mormon Emigrant Trail 2340 Comment
  SEINET1909548  Quercus agrifolia George K. Helmkamp 2004-1 8408 San Luis Obispo Central Coast: Nipomo Valley, along Los Berros Rd., 0.8 mi NW of its junction with Hwy US-101 Comment
  UCR140769  Quercus agrifolia var. agrifolia George K. Helmkamp 2004-3-25 8408 San Luis Obispo Central Coast, Nipomo Valley, along Los Berros Rd., 0.8 mi NW of its junction with Hwy US-101 73 Comment
  UCR173660  Quercus chrysolepis George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10324 Amador Northern Sierra Nevada foothills, Climax Road southwest of Pine Grove, 0.1 mile west of Calif. Hwy 88 701 Comment
  UCR198559  Quercus chrysolepis George K. Helmkamp, E. A. Helmkamp 2008-5-4 13384 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 2.8 miles east of CA-88; at the entrance to Tiger Creek Reservoir 744 Comment
  UCD63219  Quercus douglasii G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13039 Sutter Sacramento Valley. Sutter Buttes, 2.3 miles NW of Sutter on Pass Road. 70 Comment
  UCR123337  Quercus douglasii George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6884 Tehama Central CA Valley, Calif. Hwy 36, 12 mi west of Red Bluff at junction with Cannon Rd. 305 Comment
  UCR183931  Quercus kelloggii George K. Helmkamp, E. A. Helmkamp 2006-10-26 11575 El Dorado Northern Sierra Nevada Mountains Foothills, Oak Hill Drive 1.3 miles south of Pleasant Valley Road at Tiger Lily 671 Comment
  UCR201725  Quercus lobata George K. Helmkamp, E. A. Helmkamp 2008-10-30 14283 Sacramento Southern Sacramento Valley, Highway E13 (Twin Cities Road), 3.5 miles west of CA-99 18 Comment
  UCR170324  Quercus wislizeni George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10026 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
  SD212630  Quercus wislizeni var. wislizeni G. K. Helmkamp, Elizabeth Helmkamp 2006-5-4 10291 El Dorado East end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Highway Ca 49. 543 Comment
  UCR173947  Quercus wislizeni var. wislizeni George K. Helmkamp, Elizabeth Helmkamp 2006-5-4 10291 El Dorado Northern Sierra Nevada Mountains Foothills, east end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Calif. Hwy 49 543 Comment
  UCR173951  Ranunculus alismifolius var. alismifolius George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10761 El Dorado Northern Sierra Nevada Mountains, 1.1 miles west of Wright's Lake 2027 Comment
  CLARK-A1045-1278  Ranunculus californicus George K. Helmkamp 1979-6-6 San Diego Pala Creek beside Creek, 2 miles north of Pala; Pechanga 7.5'Q Comment
  RSA0042967  Ranunculus californicus George K. Helmkamp, Mary Alice Barnes 2013-4-18 20352 Placer Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 ) of Colfax 561 Comment
  UCR103803  Ranunculus californicus George K. Helmkamp 1997-3-8 1463 San Luis Obispo Central Coast 7.5' Q., SE of Los Osos. Swift Ranch, starting c. 2 mi. south of Los Osos Valley Rd on Clark Valley Rd. 107 Comment
  UCR161951  Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 2005-2-14 8923 San Luis Obispo Outer South Coast Ranges, Santa Lucia Mtns. Huasna Canyon along Huasna Road; 8.5 mi east of its junction with Lopez Road 277 Comment
  UCR173341  Ranunculus californicus George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10379 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 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-BC378523  Ranunculus californicus var. californicus G. K. Helmkamp; E. A. Helmkamp 1999-4-18 4703 San Diego between Lake Henshaw and Matagual Valley; Barrett Hill Rd off of Hwy 79, ca. 6.5 mi SW of Warner Hot Springs 00000000000000000000000000000 488 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
  UCR163016  Ranunculus canus George K. Helmkamp, E. A. Helmkamp 2005-4-6 9337 Santa Barbara Outer South Coast Ranges, San Miguelito road SSW of Lompoc; mile 4.2 near Lompoc Hills 229 Comment
  UCD96143  Ranunculus hebecarpus G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11779 Amador Northern Sierra Nevada Mountains; along Bell Road beside Plymouth Creek, just east of CA-49 in the vincity of Enterprise. 302 Comment
  UCR107271  Ranunculus hebecarpus George K. Helmkamp, E. A. Helmkamp 1998-5-14 3667 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  UCR242783  Ranunculus muricatus George K. Helmkamp, E. A. Helmkamp 2010-4-7 15830 San Joaquin Northeast San Joaquin Valley, Collier Road, 0.1 mile west of its junction with CA-88, 1.83 mi. NE (27 deg. ) of Clements 47 Comment
  SD236391  Ranunculus occidentalis G. K. Helmkamp, E. A. Helmkamp 2008-5-20 13480 Sierra Sierra Nevada Mountains Foothills: Henness Pass road, 3.4 miles northeast of Camptonville. 1260 Comment
  UCD96797  Ranunculus occidentalis G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10967 El Dorado Northern Sierra Nevada Mnts: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCR207650  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2009-4-21 14551 El Dorado Sierra Nevada Mountains Foothills, along CA-193, 1.1 miles south of the South Fork American River at Chili Bar 381 Comment
  UCR207887  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2009-4-22 14569 Placer Sierra Nevada Mountains Foothills, Rucky Chuck Rd. (dirt) 1.2 miles southeast of Forest Hill Road 448 Comment
  UCR208571  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2009-5-4 14598 El Dorado Sierra Nevada Mountains Foothills, Sly Park Road, 0.3 miles southwest of its junction with Mormon Emigrant Trail 1067 Comment
  UCR230712  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2011-7-19 17830 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  UCR257007  Ranunculus occidentalis George K. Helmkamp, Mary Alice Barnes 2013-5-13 20576 Amador Sierra Nevada Mountains, Fiddletown Road, c. 9 miles northeast of its junction with E-16/Shenandoah Rd. near Plymouth 665 Comment
  SD255688  Raphanus raphanistrum George K. Helmkamp, Mary Alice Barnes 2013-5-13 20568 Amador Sierra Nevada Mountains Foothills: along E-16/Shenandoah Road, 3.6 road miles south of River Pines, 4.15 air miles NE (39a^z) of Plymouth (Fiddletown 7.5'Q) 516 Comment
  UCR201738  Raphanus raphanistrum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14211 Yuba Sacramento Valley, Ostrom #3 Road, 1.2 miles east of junction with CA-65, southeast of Olivehurst 20 Comment
  RSA0115435  Raphanus sativus George K. Helmkamp, Elizabeth Helmkamp 2014-1-4 22509 Colusa Sacramento Valley: along CA-20 at Sycamore Cutoff, 1.3 miles west of the Sacramento River crossing. 20 Comment
  RSA747028  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2007-9-30 13049 Sutter Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River 21 Comment
  UCR198447  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2008-3-6 13137 Sutter Sacramento Valley, Sutter Basin; junction of CA-20 and South Butte Rd, west of Yuba City 19 Comment
  UCR242844  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2010-4-14 15857 Solano Northern San Joaquin Valley, Tremont Road, 0.8 mile west of Mace Blvd, 3.8 mi. (air) SE of Davis 3 Comment
  UCR95919  Raphanus sativus George K. Helmkamp 1996-9-22 1199 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  UCR200916  Rhamnus crocea George K. Helmkamp, E. A. Helmkamp 2008-9-9 14073 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
  UCR159339  Rhamnus tomentella George K. Helmkamp, E. A. Helmkamp 2004-7-7 8738 Santa Barbara Central Coast, Termination of San Miguelito Road., 8.7 mi SW of I Street in Lompoc 244 Comment
  RSA713976  Rhus ovata George K. Helmkamp 2004-1-1 8237 Santa Barbara 1.5 mi NW of Cold Creek along San Marcos Pass Rd. 412 Comment
  SD178081  Rhus ovata G. K. Helmkamp 2004-4-21 8505 Santa Barbara San Rafael Mountains; Pintado Creek, 8.5 miles north of Los Olivos along Figeroa Mountain Road. 412 Comment
  UCR140367  Rhus ovata George K. Helmkamp 2004-4-14 8432 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR219039  Ribes cereum var. cereum George K. Helmkamp, E. A. Helmkamp 2010-7-13 16507 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  UCR78588  Ribes cereum var. cereum George K. Helmkamp 1993-9-22 37- 06 San Bernardino San Bernardino Mtns, Round Valley Road just east of Calif. Hwy 38 2378 Comment
  UCR123542  Ribes nevadense George K. Helmkamp, E. A. Helmkamp 2000-4-25 5582 Kern Tehachapi Mountains, Water Cyn Rd SW of Tehachapi and 1.0 mi south of Highline 1494 Comment
  UCR197617  Ribes nevadense George K. Helmkamp, E. A. Helmkamp 2008-5-15 13434 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 1.2 miles north of its junction with US-50 1817 Comment
  UCR250617  Robinia pseudoacacia George K. Helmkamp, Mary Alice Barnes 2013-4-24 20388 Amador Northern Sierra Nevada Mountains Foothills, Along CA-26 (Red Corral/West Point-Pioneer Rd.), 0.7 mile west of the crossing over North Fork Mokelumne River 704 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
  UCR197012  Rorippa curvisiliqua George K. Helmkamp, E. A. Helmkamp 2008-7-16 13802 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  SD236250  Rorippa nasturtium-aquaticum G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13897 Alpine Eastern Sierra Nevada Mountains: Carson River road, 0.4 mile east of its west junction with CA-88 (Woodfords 7.5'Q) 1712 Comment
  UCR122143  Rorippa nasturtium-aquaticum George K. Helmkamp, E. A. Helmkamp 2000-4-21 5455 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  UCR188031  Rorippa nasturtium-aquaticum George K. Helmkamp, E. A. Helmkamp 2007-5-1 11927 El Dorado Foothills, Northern Sierra Nevada Mountains, along CA-49, 2.5 miles northwest of US-50 in Placerville 549 Comment
  UCR37549  Rorippa nasturtium-aquaticum George K. Helmkamp 1984-4-20 840420- 53 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
  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
  UCR131902  Rubus discolor George K. Helmkamp, E. A. Helmkamp 2000-6-18 5736 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR233099  Rubus discolor George K. Helmkamp, E. A. Helmkamp 2011-7-17 17745 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
  CAS-BOT-BC147110  Rubus glaucifolius G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12053 Placer Northern Sierra Nevada Mountains Foothills: along Forest Hill Road, 2.3 miles northeast of Foresthill 1116 Comment
  UCR173992  Rubus laciniatus George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-29 10799 Calaveras Northern Sierra Nevada foothills, along Calif. Hwy 26, 0.2 mile north of West Point 838 Comment
Read comments
Aug 4 2008
  UCR248399  Rubus laciniatus George K. Helmkamp, Elizabeth Helmkamp 2013-7-25 22021 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road, 7.4 miles east of the junction with Volcanoville Road 1320 Comment
  UCR191064  Rubus parviflorus George K. Helmkamp, E. A. Helmkamp 2007-6-6 12280 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 3.2 miles south of it junction with Mormon Emigrant Trail, east of Jenkinson Lake and near Diamond Creek 1189 Comment
  UCR252936  Rubus parviflorus George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 20988 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam for Lower Bear River Reservoir 1784 Comment
  UCR132145  Rubus ursinus George K. Helmkamp 2003-10-24 8217 San Luis Obispo Central Coast, El Campo Rd 0.1 mi east of Los Berros Rd, SE of Arroyo Grande 46 Comment
  UCR218752  Rumex acetosella George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16323 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
  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
  UCR222560  Rumex conglomeratus George K. Helmkamp, E. A. Helmkamp 2010-6-5 16238 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
  CDA2903  Rumex crispus G. K. Helmkamp, E. A. Helmkamp 2004-6-24 8725 Santa Barbara Central Coast; Between Ocean Park and Pacific Ocean at Surf; NW of Lompoc Comment
  UCR158372  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2004-6-24 8712 A Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 Comment
  UCR162154  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2005-2-14 8909 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive 122 Comment
  UCR173654  Rumex crispus George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10158 Amador Northern Sierra Nevada Foothills, ESE of Sacramento; 1.0 mi south of Plymouth along Calif. Hwy 49 326 Comment
  UCR219018  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2010-6-23 16342 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
  UCR233111A  Rumex crispus George K. Helmkamp, E. A. Helmkamp 2011-5-12 17286 Sutter Sacramento Valley, junction of Nicolaus Road and Pleasant Grove Road, 2 miles ESE (97 deg. ) of Trowbridge 16 Comment
  UCR253262  Rumex crispus George K. Helmkamp, Amy Barnes 2014-4-7 22720 Sacramento Sacramento Valley, Clay East Road, 1 mile east of its junction with CA-104 52 Comment
  IRVC29047  Rumex crispus G. K. Helmkamp 2003-9-26 8178 San Luis Obispo southwest edge of Oceano at the edge of sand dune recreation area Central Coast 6 Comment
  UCR257199  Rumex dentatus George K. Helmkamp, Mary Alice Barnes 2013-5-8 20508 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
  SEINET3860447  Rumex paucifolius George K. Helmkamp, E. A. Helmkamp 2010-7-23 16627 El Dorado Northern Sierra Nevada Mountains: Forestry Route 42, 1.8 miles west of its junction with Wright's Lake Road.; 0 2034 Comment
  UCR116018  Rumex paucifolius George K. Helmkamp, E. A. Helmkamp 2000-7-18 5880 Mono Eastern Sierra Nevada Mountains, Humboldt-Toiyabe National Forest, 5.1 mi west of US Hwy 395 at Conway Summit, east of Trumbull Lake, on Virginia Lake Road 2927 Comment
  RSA492828  Salazaria mexicana 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
  UCR120512  Salicornia pacifica George K. Helmkamp, E. A. Helmkamp 2001-6-3 6810 Solano San Francisco Bay Region, Hammond Island SE of Fairfield. Grizzly Rd., 7.5 mi SE of entrance to wildlife preserve 6 Comment
  CAS-BOT-BC304416  Salix lasiolepis George K. Helmkamp; E. A. Helmkamp 2012-3-9 18609 Yolo Sacramento Valley: East Main Street (Co. Rd. 22), Woodland (parallel to I-5), 1.7 mile west of the Sacramento River 7 Comment
  UCR171036  Salix lasiolepis George K. Helmkamp, E. A. Helmkamp 2006-2-24 10066 El Dorado Northern Sierra Nevada Foothills, 1.5 mi NW of Greenwood along Calif. Highway 193 537 Comment
  UCR122939  Salvia columbariae George K. Helmkamp, E. A. Helmkamp 2001-3-30 6437 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR37631  Salvia columbariae George K. Helmkamp 1984-4-20 840420- 13 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
  SD178217  Salvia spathacea G. K. Helmkamp 2004-4-21 8504 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi north of Los Olivos along Figeroa Mtn Rd. In dense clusters, mostly in shaded areas. 412 Comment
  UCR161795  Salvia spathacea George K. Helmkamp, E. A. Helmkamp 2005-3-14 9155 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  RSA0051411  Sambucus racemosa var. microbotrys George K. Helmkamp, Belinda Pesheck 2013-7-14 21085 Alpine Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road. 2468 Comment
  UCR190585  Sanguisorba minor subsp. muricata George K. Helmkamp, E. A. Helmkamp 2007-9-14 12959 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road 0.4 mile east of Foresthill 942 Comment
  UCR122628  Sanicula bipinnata George K. Helmkamp, E. A. Helmkamp 2002-4-23 7571 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
  UCR122409  Sanicula bipinnatifida George K. Helmkamp, E. A. Helmkamp 2002-4-24 7534 Madera Western Sierra Nevada foothills, Auberry Rd (Rd 200/North Fork Rd.) 5.0 mi south of North Fork 503 Comment
  UCR197334  Sanicula bipinnatifida George K. Helmkamp, E. A. Helmkamp 2008-5-8 13401 Calaveras Sierra Nevada Mountains Foothills, Ridge Road, 1.6 miles east of CA-26, southeast of Glencoe 866 Comment
  RSA597221  Sanicula crassicaulis George K. Helmkamp 1996-5-24 1035 San Luis Obispo State Park System north of Turi Road and 1.5 mi east of South bay Blvd. 95 Comment
  UCR161305  Sanicula crassicaulis George K. Helmkamp, E. A. Helmkamp 2005-3-9 9100 San Luis Obispo Central Coast Hills, Irish Hills; See Canyon, 4.4 mi N of San Luis Bay Drive 186 Comment
  UCR184790  Sanicula crassicaulis George K. Helmkamp, E. A. Helmkamp 2007-5-7 11948 El Dorado Foothills, Northern Sierra Nevada Mountains, Pedro Hills Road, 0.3 mile west of the junction with Calif. Hwy 49, junction 5.3 miles south of Cool 299 Comment
  UCR230665  Sanicula crassicaulis George K. Helmkamp, E. A. Helmkamp 2011-5-10 17227 Amador Northern Sierra Nevada Mountains Foothills, Turner Road, 0.8 miles south of its junction with Amador Creek Road, 0.95 mi. SE (119 deg. ) of Amador City 311 Comment
  UCR161357  Sanicula laciniata George K. Helmkamp, E. A. Helmkamp 2005-3-8 9074 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon Road, 4.6 mi west of Los Osos Valley Road 316 Comment
  CAS-BOT-BC229020  Sanicula tuberosa George K. Helmkamp; Ann Kerchner; Amy Barnes 2011-8-13 18057 Calaveras Northern Sierra Nevada Mountains: Black Springs Road (Forest Route 6N45?), 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR229596  Sanicula tuberosa George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18057 Calaveras Northern Sierra Nevada Mountains, Black Springs Road [Forest Route 7N23], 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR233121B  Sanicula tuberosa George K. Helmkamp, E. A. Helmkamp 2011-8-6 18003 Amador Northern Sierra Nevada Mountains, Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  UCR110987  Sarcodes sanguinea George K. Helmkamp 1998-6-27 4128 Riverside Santa Rosa Mtns., 9 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), in vicinity of Santa Rosa Spring. 2232 Comment
  UCR188242  Saxifraga californica George K. Helmkamp, E. A. Helmkamp 2007-4-27 11861 El Dorado Foothills, Northern Sierra Nevada Mountains, Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House 1027 Comment
  SEINET273037  Scandix pecten-veneris G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3714 Santa Clara Sierra Azul: Hicks Rd at S end of San Jose; 3.2 mi S of Camden Av. 152 Comment
  UCR206400  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-11 14377 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  SEINET3287506 Image available Schedonorus arundinaceus George K. Helmkamp, E. A. Helmkamp 2009-5-26 14801 El Dorado Sierra Nevada Mountains Foothills; Lake Oaks Mobile Home Park, Diamond Springs. 530 Comment
  UCD65889  Schedonorus arundinaceus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-19 10481 El Dorado Northern Sierra Nevada Foothills: Lake Oaks mobile home park; corner of Pleasant Valley Road and Patterson Drive, Diamond Springs. 537 Comment
  UCR102993  Schismus arabicus George K. Helmkamp 1998-3-30 3007 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR133344  Schoenoplectus acutus var. occidentalis George K. Helmkamp 1993-10-5 39- 07 Inyo Owens Valley, Pleasant Valley, north of Bishop, at edge of Owens River 1284 Comment
  UCR215782  Scirpus microcarpus George K. Helmkamp, E. A. Helmkamp 2009-7-30 15350 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR262001  Scirpus microcarpus George K. Helmkamp, Amy Barnes 2014-10-10 23163 El Dorado Northern Sierra Nevada Mountains, along CA-89, 0.6 mile northwest of Luther Pass 2378 Comment
  RSA748112  Scleranthus annuus George K. Helmkamp, E. A. Helmkamp 2007-4-23 11813 Amador junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 Comment
  SD197732  Scleranthus annuus G. K. Helmkamp, E. A. Helmkamp 2007-4-23 11813 Amador Northern Sierra Nevada Mountains; junction of Tonzi Road and CA-124, ca. 7.0 mile north of Ione. 228 Comment
  UCR102146  Scrophularia californica George K. Helmkamp, E. A. Helmkamp 1998-5-14 3679 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  UCR198494  Scrophularia desertorum George K. Helmkamp, E. A. Helmkamp 2008-5-4 13397 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  SEINET7249119  Scrophulariaceae George K. Helmkamp, Mary Alice Barnes 2013-1 Placer Comment
  UCD60411  Sedum obtusatum subsp. obtusatum G. K. Helmkamp; E. A. Helmkamp 2007-4-27 11862 El Dorado Northern Sierra Nevada Mountains: Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House. 1027 Comment
  SEINET2441001  Sedum spathulifolium George K. Helmkamp, E. A. Helmkamp 2010-5-14 16040 El Dorado Sierra Nevada Mountains Foothills: Happy Valley Road, 1.1 mi NE of Somerset, just W of the bridge over the Cosumnes River (Camino 7.5'). 544 Comment
  UCR230993  Sedum spathulifolium George K. Helmkamp, E. A. Helmkamp 2011-6-9 17536 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
  UCR235574  Sedum spathulifolium George K. Helmkamp, E. A. Helmkamp 2012-5-3 18897 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road north of Pollock Pines, at the south side of the bridge over the South Fork American River 591 Comment
  UCR37434  Selaginella bigelovii George K. Helmkamp 1984-5-1 C 5 San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, Big Morongo Preserve of the Nature Conservancy: south of the town of Morongo Valley in Big Morongo Canyon 808 Comment
  UCR169943  Senecio George K. Helmkamp 2004-6-12 08617 Santa Barbara Central Coast Range, Purissima Hills. Harris Grade Rd at '28.04 mi', about 3 mi south of CA Hwy 135 229 Comment
  CAS-BOT-BC226818  Senecio aronicoides George K. Helmkamp; E. A. Helmkamp 2012-5-11 18944 Placer Northern Sierra Nevada Mountains Foothills: Finning Mill Road, 1.2 miles north of its junction with Forest Hill Road 1104 Comment
  UCR122207  Senecio aronicoides George K. Helmkamp, E. A. Helmkamp 2000-6-18 5796 Mendocino North Coast Range, 9.2 mi east of CA Hwy 1 on CA Hwy 20, southeast of Fort Bragg 305 Comment
  UCR15000  Senecio aronicoides George K. Helmkamp 1976-6-22 s.n. Mono Sierra Nevada Mtns, Mammoth Lakes 2409 Comment
  CLARK-A1045-258  Senecio douglasii var. monoensis George K. Helmkamp 1977-4-22 San Bernardino Oro Grande Wash intersection of Phelan Road and U.S. Highway 395, west of Hesperia; ; Baldy Mesa 7.5'Q 914 Comment
  CAS-BOT-BC363996  Senecio integerrimus var. major G. K. Helmkamp; E. A. Helmkamp 2010-7-9 16472 El Dorado Northern Sierra Nevada Mountains: Light Canyon Road, 0.1 mile north of its junction with Mormon Emigrant Trail (Iron Mountain Rd.), 20.5 mi. ESE (99 deg. ) of Placerville 1831 Comment
  CAS-BOT-BC364027  Senecio integerrimus var. major G. K. Helmkamp; E. A. Helmkamp 2007-6-12 12328 Placer Northern Sierra Nevada Mountains: Lake Spaulding Road just north of its junction with Hwy CA-20 1610 Comment
  UCD135576  Senecio integerrimus var. major G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11146 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
  CLARK-A1045-1411  Senecio triangularis George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada Porcupine Flats Campground; meadow; ; Yosemite Falls 7.5'Q 2590 Comment
  RSA0081175  Senecio triangularis George K. Helmkamp, E. A. Helmkamp 2006-7-31 11058 El Dorado Along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50. 2049 Comment
  RSA614906  Senecio triangularis George K. Helmkamp, E. A. Helmkamp 1997-9-8 2252 Mono South side of Lake Mary, South of Mammoth Lakes. 2744 Comment
  UCD135786  Senecio triangularis G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11164 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 21.0 miles east of its junction with Sly Park Road. 2174 Comment
  UCR190163  Senecio triangularis George K. Helmkamp, E. A. Helmkamp 2007-7-17 12543 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
  RSA790653  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-4-17 18778 Yolo Along County Road 26, 1.4 miles west of its intersection with Road 89, c. 12 miles WSW of Woodland 65 Comment
  RSA518291  Sesbania exaltata George K. Helmkamp 1989-9-16 s.n. Riverside W side of State Hwy. 78, 0.7 mi. N of Palo Verde. Palo Verde. 75 Comment
  UCR107315  Sherardia arvensis George K. Helmkamp, E. A. Helmkamp 1998-5-16 3722 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR121586  Sherardia arvensis George K. Helmkamp, E. A. Helmkamp 1999-6-28 4965 San Mateo Coast Range; Santa Cruz Mtns, Sky Londa; junction of Calif. Hwy 84 and Calif. Hwy 35, 5 mi south of central Redwood City 457 Comment
  UCD116655  Sidalcea glaucescens G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11170 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road. 2250 Comment
  UCD116663  Sidalcea glaucescens G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12604 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20. 1793 Comment
  UCR189517  Sidalcea glaucescens George K. Helmkamp, E. A. Helmkamp 2007-8-16 12737 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail 2172 Comment
  UCR197551  Sidalcea glaucescens George K. Helmkamp, E. A. Helmkamp 2008-6-23 13713 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
  RSA0094839  Sidalcea hartwegii George K. Helmkamp, Amy Barnes 2014-5-8 22861 Amador Sierra Nevada Mountains Foothills. Sutter Creek-Volcano Road, 0.2 mile east of old CA-49 in town of Sutter Creek. 375 Comment
  RSA750431  Sidalcea malviflora subsp. asprella George K. Helmkamp, E. A. Helmkamp 2008-8-20 14017 Placer Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR123964  Sidalcea multifida George K. Helmkamp, E. A. Helmkamp 2001-7-6 6847 Alpine Sierra Nevada Mountains, Calif. Hwy 89, 7.1 mi west of US-395 2470 Comment
  UCR189630  Sidalcea oregana subsp. spicata George K. Helmkamp, E. A. Helmkamp 2007-7-27 12639 Placer Northern Sierra Nevada Mountains, 0.1 mile south of the Rainbow exit from Interstate-80, 0.5 miles east of Rainbow 1790 Comment
  UCR206930  Silene bridgesii George K. Helmkamp, E. A. Helmkamp 2009-6-11 14953 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
  SD244133  Silene californica George K. Helmkamp, E. A. Helmkamp 2012-5-31 19113 Calaveras Northern Sierra Nevada Mountains Foothills: Lily Gap Road, 0.9 mile northeast of its junction with Winton Road, 8.1 km NE (60a^z) of West Point (Devils Nose 7.5'Q) 1132 Comment
  UCR198558  Silene californica George K. Helmkamp, E. A. Helmkamp 2008-5-4 13391 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  UCR250673  Silene californica George K. Helmkamp, Mary Alice Barnes 2013-4-24 20413 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 1.9 miles east of its junction with CA-26 in West Point 652 Comment
  UCR178748  Silene douglasii George K. Helmkamp, E. A. Helmkamp 2006-8-30 11303 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of Calif. Hwy 88 and generally SE of Caples Lake 2521 Comment
  RSA709062  Silene gallica George K. Helmkamp 2005-4-17 9371 San Luis Obispo Central Coast: Corbett canyon, 2.3 miles N of Hwy CA-227 in Arroyo Grande. 81 Comment
  RSA782377  Silene gallica George K. Helmkamp, E. A. Helmkamp 2010-4-23 15903 Placer along Salmon Falls Road, at Miners Valley Rd., 4.5 miles south of junction with CA-49 at Pilot Hill 287 Comment
  SD237401  Silene gallica G. K. Helmkamp, E. A. Helmkamp 2010-4-23 15903 Placer Sierra Nevada Mountains Foothills: along Salmon Falls Road, at Miners Valley Road, 4.5 miles south of junction with CA-49 at Pilot Hill (Pilot Hill 7.5'Q) 287 Comment
  UCR140087  Silene gallica George K. Helmkamp 2004-2-29 8316 San Luis Obispo Central Coast, Nipomo Mesa, Nipomo, Orchard Ave. 0.1 mi NW of Division St. 116 Comment
  UCR160300  Silene gallica George K. Helmkamp, E. A. Helmkamp 2005-6-9 9600 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
  UCR188011  Silene gallica George K. Helmkamp, E. A. Helmkamp 2007-5-1 11909 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
  UCR218174  Silene gallica George K. Helmkamp, E. A. Helmkamp 2010-5-31 16164 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 1.6 miles east of the village of Sutter Creek 412 Comment
  UCR233122A  Silene gallica George K. Helmkamp, E. A. Helmkamp 2011-5-21 17327 Calaveras Northern Sierra Nevada Mountains Foothills, Ridge Road, 1.9 rd. miles southeast of CA-26, 1.8 air mi. southeast (130 deg. ) of Glencoe 863 Comment
  CLARK-A1045-898  Silene gallica George K. Helmkamp 1978-4-15 San Bernardino Fontana Sierra Avenue, disturbed roadside; Fontana 7.5'Q Comment
  UCR130061  Silene lemmonii George K. Helmkamp, E. A. Helmkamp 2001-7-7 6912 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
  CAS-BOT-BC438824  Silene vulgaris George K. Helmkamp; Mary Alice Barnes 2013-5-3 20462 Placer Foothills, northern Sierra Nevada Mountains: SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road. 974 Comment
  UCR190136  Silene vulgaris George K. Helmkamp, E. A. Helmkamp 2007-9-14 12953 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road 0.4 mile east of Foresthill 942 Comment
  UCR161654  Silybum marianum George K. Helmkamp, E. A. Helmkamp 2005-5-17 9485 Monterey Central Coast, 0.9 mi south of Plaskett (N of Gorda); along Calif. Highway 1 90 Comment
  UCR215918  Sisymbrium altissimum George K. Helmkamp, E. A. Helmkamp 2009-6-29 15067 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
  SD240949  Sisymbrium officinale George K. Helmkamp, E. A. Helmkamp 2012-4-7 18723 San Joaquin San Joaquin Valley: along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden (Valley Springs 7.5'Q) 52 Comment
  UCR140127  Sisymbrium orientale George K. Helmkamp 2004-3-13 8344 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCD138876  Sisyrinchium bellum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10385 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 Comment
  HSC79215  Solanum americanum G. K. Helmkamp 1984-4-29 - 2 San Bernardino Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters, floor of main canyon to 0.25 mi. up a broad side canyon to the east. 701 Comment
  UCR15431  Solanum americanum George K. Helmkamp 1977-8-11 s.n. Ventura Corner of A street and Ventura Boulevad, Port Hueneme. 3 Comment
  UCR122985  Solanum douglasii George K. Helmkamp, E. A. Helmkamp 2001-6-2 6782 San Mateo San Francisco Bay Region, Purisima Creek Road, east of Half Moon Bay at Purisima Creek, 3.2 miles east of CA Hwy 1 244 Comment
  RSA0053698  Solidago canadensis subsp. elongata G. K. Helmkamp, E. A. Helmkamp 2012-9-25 19933 Nevada Northern Sierra Nevada Mountains Bowman Lake Road, 1.2 miles north of CA-20, N of I-80 between Grass Valley and Truckee 1427 Comment
  UCR232180  Solidago canadensis subsp. elongata George K. Helmkamp, E. A. Helmkamp 2011-9-1 18195 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz 1280 Comment
  UCD135930  Solidago elongata G. K. Helmkamp; E. A. Helmkamp 2006-10-10 11521 Nevada Northern Sierra Mountains Foothills: along Hwy. CA-49, 5.8 miles NNW of Nevada City. 750 Comment
  UCR102571  Solidago multiradiata George K. Helmkamp, E. A. Helmkamp 1997-9-11 2377 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  UCR242009  Solidago sparsiflora George K. Helmkamp, E. A. Helmkamp 2012-9-15 19844 El Dorado Northern Sierra Nevada Mountains Foothills, Volcanoville Road, 1.3 miles north of its junction with Wentworth Springs Road 1107 Comment
  OBI37465  Sonchus asper G. Helmkamp 1985-5-4 448 San Bernardino Morongo Cyn; SE of Morongo Valley. Along the Mesquite Trl at the old dam 747 Comment
  UCR158754  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2004-6-24 8697 Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 Comment
  UCR201922  Sonchus oleraceus George K. Helmkamp, E. A. Helmkamp 2008-10-9 14235 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, 1.1 miles north of the junction of CA-12 and CA-88, NE of Lodi 35 Comment
  UCR201739  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2008-10-6 14212 Yuba Sacramento Valley, Ostrom #3 Road, 1.2 miles east of junction with CA-65, southeast of Olivehurst 20 Comment
  UCR241267  Sorghum halepense George K. Helmkamp, E. A. Helmkamp 2012-9-7 19763 Amador Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of the junction with Fiddletown Road at Plymouth 299 Comment
  UCR233270  Spartium junceum George K. Helmkamp, E. A. Helmkamp 2011-7-9 17679 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim Road, 1.4 miles northwest of the city of Foresthill 764 Comment
  CLARK-A1045-1375  Spergula arvensis George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay Turri Road at Morro Bay; Morro Bay S 7.5'Q Comment
  UCR231341  Spergularia macrotheca var. leucantha George K. Helmkamp, E. A. Helmkamp 2011-5-6 17191 Yuba East edge of Sacramento Valley, Camp Far West Road, 0.9 mile west of the junction at Camp Far West Reservoir 65 Comment
  CLARK-A1045-1008  Sphaeralcea ambigua George K. Helmkamp 1977-4-23 Inyo Panamint Mountains east of Townes Pass; ; Panamint Butte, 7.5' Q 1219 Comment
  UCR30102  Sphaeralcea ambigua George K. Helmkamp 1983-4-5 483- 14 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  SD197656  Sphenosciadium capitellatum G. K. Helmkamp, E. A. Helmkamp 2008-8-8 13992 Alpine Northern Sierra Mountains: along CA-89, 1.4 miles east of Luther Pass. 2262 Comment
  UCR175700  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2006-7-10 10939 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
  UCR190709  Spiraea densiflora George K. Helmkamp 2007-6-29 12432 Amador Northern Sierra Nevada Mountains, Sandy Cove picnic area southeast of CA-88 beside the west edge of Silver Lake 2244 Comment
  UCR201575  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2008-8-1 13934 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 3.8 miles north of its junction with CA-50 2076 Comment
  UCR237284  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2012-7-2 19306 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
  UCR253231  Spiraea densiflora George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 20980 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam for Lower Bear River Reservoir 1784 Comment
  UCD114065  Spiraea splendens G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12531 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 2.7 miles south of its junction with CA-88. 2238 Comment
  UCR96381  Spirodela polyrhiza George K. Helmkamp 1996-9-28 1243 Mono Eastern Sierra Nevada Mtns., Hot Creek at Owens River Road 2134 Comment
  UCR99894  Sporobolus contractus George K. Helmkamp 1997-9-30 2501 Inyo Sierra Nevada Mtns., Big Pine Creek 2287 Comment
  RSA795070  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2011-10-13 18412 El Dorado Forebay Road, 8.1 miles northwest of Pollock Pines, at north side of bridge over the South Fork American River 596 Comment
  SD243168  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2011-10-13 18412 El Dorado Northern Sierra Nevada Mountains Foothills: Forebay Road, 8.1 miles northwest of Pollock Pines, at north side of bridge over the South Fork American River. 595 Comment
  UCR188864  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2007-7-27 12607 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20 1793 Comment
  UCR252963  Stachys ajugoides var. rigida George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22140 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 4.8 miles northeast of the town of Sutter Creek 405 Comment
  UCR257744  Stachys ajugoides var. rigida George K. Helmkamp, Amy Barnes, Ann Kerchner 2012-7-22 19444 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
  UCR118360  Stachys bullata George K. Helmkamp, E. A. Helmkamp 1998-6-30 4235 San Luis Obispo Central Coast Ranges, Irish Hills, SW of San Luis Obispo, Prefumo Cyn., 3.2 mi SW of Los Osos Valley Rd. 198 Comment
  UCD125788  Stachys rigida subsp. rivularis G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12607 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20. 1793 Comment
  UCR123340  Stachys rigida var. rigida George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6897 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
  SEINET4560541  Stellaria media George K. Helmkamp, E. A. Helmkamp 2012-1 18557 Sacramento Sacramento Valley: along Dillard Road, 0.2 mile south of its junction with CA-16/Jackson Rd, SE of Sacramento. 58 Comment
  UCR106705  Stellaria media George K. Helmkamp, E. A. Helmkamp 1998-5-18 3773 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
  UCR188824  Stellaria media George K. Helmkamp, E. A. Helmkamp 2007-3-23 11701 El Dorado Foothills, Northern Sierra Nevada Mountains, Rattlesnake Bar Road, 1.4 miles west of CA-49 at Pilot Hill 313 Comment
  UCR197390  Stellaria media George K. Helmkamp, E. A. Helmkamp 2008-3-18 13181 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
  UCR197821  Stellaria media George K. Helmkamp, E. A. Helmkamp 2008-5-29 13538 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
  UCR253630  Stellaria media George K. Helmkamp 2014-3-11 22547 Nevada Sierra Nevada Mountains Foothills, junction of Wolf Road and Lime Kiln Road, W of Hwy 49 & c. 13 miles N of Auburn 518 Comment
  UCR206805  Stellaria neglecta George K. Helmkamp, E. A. Helmkamp 2009-3-19 14415 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
  RSA666858  Stephanomeria cichoriacea George K. Helmkamp, E. A. Helmkamp 2000-9-2 5967 San Luis Obispo Profumo Canyon, 2.2 mi W of Los Osos Valley Rd. 137 Comment
  UCR234609  Stephanomeria lactucina George K. Helmkamp, E. A. Helmkamp 2011-8-6 18010 Amador Northern Sierra Nevada Mountains, Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  UCR242799  Stephanomeria lactucina George K. Helmkamp, E. A. Helmkamp 2010-9-1 16901 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  UCR242809  Stephanomeria lactucina George K. Helmkamp, E. A. Helmkamp 2010-9-1 16892 El Dorado Northern Sierra Nevada Mountains, Mehrten Springs Road, 0.6 mile north of its junction wtih CA-88 2018 Comment
  UCR14514  Stephanomeria spinosa George K. Helmkamp 1974-7-28 s.n. Mono Owens Valley, Along U.S. Hwy 395 near Mammoth Creek 2226 Comment
  UCR67447  Stephanomeria virgata George K. Helmkamp 1990-9-23 D- 8 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  SEINET10876081  Stipa lemmonii George K. Helmkamp, E. A. Helmkamp 2013-7-10 Helmkamp 21015 Amador Northern Sierra Nevada Mountains; Plasse Road at the southern end of Silver Lake, off Highway 88/Carson Pass Highway (Tragedy Spring 7.5' Quad.). 2191 Comment
  RSA0035525  Stipa nelsonii George K. Helmkamp, Belinda Pesheck 2013-7-14 21051 Alpine off Blue Lakes Road, 9.4 miles south of CA-88, between a private dirt road and Charity Valley Creek 2409 Comment
  UCR92495  Stipa occidentalis George K. Helmkamp 1996-6-11 1154 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
  UCR249870  Stipa occidentalis var. pubescens George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20908 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the junction with Pilliken Road 1825 Comment
  CLARK-A1045-1416  Streptanthus tortuosus var. orbiculatus George K. Helmkamp 1977-8-6 Mariposa Sierra Nevada Porcupine Flats Campground; dry slope under pines; ; Yosemite Falls 7.5'Q 2590 Comment
  UCR193286  Streptanthus tortuosus var. orbiculatus George K. Helmkamp, E. A. Helmkamp 2007-6-12 12355 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 2.9 miles north of its junction with Hwy CA-20; just north of the South Yuba River 1451 Comment
  UCR197812  Streptanthus tortuosus var. orbiculatus George K. Helmkamp, E. A. Helmkamp 2008-7-11 13760 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
  CLARK-A1045-311  Stylocline gnaphaloides George K. Helmkamp 1978-6-1 #2 Riverside Santa Ana Mountains off of De Luz Road near [southeast of] Mesa de Burro; ; Murrieta 7.5'Q 487 Comment
  UCR123911  Symphoricarpos rotundifolius var. rotundifolius George K. Helmkamp, E. A. Helmkamp 2001-7-7 6922 Tehama Sierra Nevada Mountains, Calif. Hwy 36, 2.6 mi west of Mineral, about 33 mi west of Chester, Lake Almanor 1418 Comment
  UCR182299  Symphoricarpos rotundifolius var. rotundifolius George K. Helmkamp, E. A. Helmkamp 2006-10-8 11498 Calaveras Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 26 at the West Branch of the Mokulumne River, about 15 miles west of Calif. Hwy 49 710 Comment
  CAS-BOT-BC536082  Symphyotrichum foliaceum var. parryi G. K. Helmkamp; Elizabeth Helmkamp 2013-8-14 22204 Alpine Northern Sierra Nevada Mtns: Ebbets Pass, along CA-4, 4.8 mi W of jct with CA-89 1923 Comment
  SEINET3246021  Symphyotrichum foliaceum var. parryi G. K. Helmkamp, E. A. Helmkamp 2007-1 12743 Amador Northern Sierra Nevada Mountains: along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail. 2172 Comment
  UCD136623  Symphyotrichum spathulatum G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12743 Amador Northern Sierra Nevada Mountains: along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail. 2172 Comment
  UCD136683  Symphyotrichum subulatum var. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13024 Sutter Central Valley; Sacramento Valley: American Basin, junction of Sankey Road and CA-99, 2.0 miles north of the Sacramento Co. line. 3 Comment
  UCR101053  Tamarix parviflora George K. Helmkamp, E. A. Helmkamp 1998-4-9 3291 San Bernardino Mojave Desert, vic. of Harper Dry Lake, 3.8 mi. north of Calif. hwy 58 along Harper Lake Rd. 655 Comment
  UCR122572  Tamarix ramosissima George K. Helmkamp, E. A. Helmkamp 2000-8-29 5982 Riverside Colorado Desert., South of Mecca, where Lincoln St. crosses the Whitewater River, about 0.5 mile from the Salton Sea -67 Comment
  UCR237375  Tellima grandiflora George K. Helmkamp, E. A. Helmkamp 2012-6-13 19188 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 5.6 miles north of its junction with CA-20 and along Washington Creek 787 Comment
  SBBG128643  Tellima grandiflora G. K. Helmkamp, E. A. Helmkamp 2011-6-9 17497 Nevada Tyler Foote Crossing Rd, 1.6 mi N of its jct with Grizzly Hill Rd, generaly N of N Columbia 930 Comment
  UCR14569  Tetracoccus dioicus George K. Helmkamp 1974-5-16 s.n. San Diego Peninsular Range, 5 miles west of Rainbow Comment
  OBI39257  Tetradymia canescens G. K. Helmkamp 1985-8-20 885 -7 Mono Along Owens river at Big Springs campground, 7 airline mi NE of Mammoth Lakes, above Arcularius Ranch 2225 Comment
  UCR79299  Tetradymia stenolepis George K. Helmkamp 1993-9-12 23- 15 San Bernardino San Bernardino Mtns., edge of Burns Canyon 1375 Comment
  UCR170416  Teucrium chamaedrys George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10023 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
  SD241162  Thalictrum fendleri var. fendleri George K. Helmkamp, E. A. Helmkamp 2006-7-12 10999 El Dorado Northern Sierra Nevada Mountains: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 (Echo Lake 7.5'Q) 2104 Comment
  UCD96805  Thalictrum fendleri var. fendleri G. K. Helmkamp; E. A. Helmkamp 2007-8-4 12688 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
  UCR175637  Thalictrum fendleri var. fendleri George K. Helmkamp, E. A. Helmkamp 2006-7-12 10999 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR189443  Thalictrum fendleri var. fendleri George K. Helmkamp, E. A. Helmkamp 2007-8-4 12688 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
  UCR51457  Thelypodium crispum George K. Helmkamp 1987-6-17 s.n. Mono Owens River, 0.5 mi downstream from Benton Crossing 2070 Comment
  UCR97542  Thelypodium lasiophyllum George K. Helmkamp, E. A. Helmkamp 1997-3-8 1404 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
  RSA0039268  Thysanocarpus curvipes George K. Helmkamp, Mary Alice Barnes 2013-4-18 20338 Placer Yankee Jim Road, 0.9 mile east of its junction with Canyon Way, 4.4 miles SE (167 ) of Colfax 561 Comment
  UCD115930  Thysanocarpus curvipes G. K. Helmkamp; E. A. Helmkamp 2006-3-26 10105 El Dorado Northern Sierra Nevada. ENE of Sacramento; Rock Creek Road, 0.9 mile E of CA Highway 193. 396 Comment
  UCR171116  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2006-3-26 10105 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; Rock Creek Road, 0.9 mi east of Calif. Highway 193 396 Comment
  UCR206879  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2009-3-6 14340 El Dorado Northern Sierra Nevada Mtns. Foothills, Rock Creek Road, 4.9 miles east of its junction with CA-193 and near Rock Creek 483 Comment
  UCR217897  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2010-5-22 16091 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
  UCR250334  Thysanocarpus curvipes George K. Helmkamp, Mary Alice Barnes 2013-4-18 20356 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
  CLARK-A1045-345  Tidestromia oblongifolia George K. Helmkamp 1977-11-6 Riverside Salton Sea Salton Sea State Recreation Area; Salt Creek Campground area; sandy slope between the highway and the Sea, just northwest of Salt Creek; Durmid 7.5'Q Comment
  UCR89558  Tiquilia plicata George K. Helmkamp 1994-3-10 42- 01 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
  OBI82263  Torilis arvensis George K Helmkampf, Mary Alice Barnes 2013-5-3 20492 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
  RSA0115749  Torilis arvensis George K. Helmkamp 2014-5-17 22884 Calaveras Sierra Nevada Mountains Foothills: along CA-26, 2.6 miles northeast of CA-49 at Mokelumne Hill. 518 Comment
  RSA614554  Torilis arvensis George K. Helmkamp, E. Helmkamp, A. Kerchner 1997-6-25 2123 Mendocino Anderson Valley, CA Hwy 128, NW of Boonville. 91 Comment
  UCD128157  Torilis arvensis G. K. Helmkamp; Elizabeth Helmkamp 2006-5-13 10427 A Placer Northern Sierra Nevada Foothills. 2.1 miles south of Auburn along CA Hwy 49. 293 Comment
  UCR102549  Torilis arvensis George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2123 Mendocino North Coast Range, Anderson Valley, Calif. Hwy 128, NW of Boonville 91 Comment
  UCR232217  Torilis arvensis George K. Helmkamp, E. A. Helmkamp 2011-5-6 17218 Placer Eastern Edge of Sacramento Valley, Camp Far West Road, 0.1 mile west of its junction with McCourtney Road, c. 6.3 mi. NE (67 deg. ) of Wheatland 58 Comment
  UCR253250  Torilis arvensis George K. Helmkamp, Amy Barnes 2013-9-23 22316 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road (beside Angel's Creek), 0.6 mile northeast of its junction with CA-4 974 Comment
  UCR171183  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2005-7-11 9684 El Dorado Northern Sierra Nevada Foothills, 30 miles SW of Lake Tahoe; 1 mile east of Jenkinson Lake along Mormon Emigrant Road/County Highway 5 1220 Comment
  UCR176056  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2006-7-12 10986 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR189763  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2007-8-9 12720 El Dorado Northern Sierra Nevada Mountains, Wright's Lake; south side of the lake at the entrance to the campground 2131 Comment
  SD234541  Tribulus terrestris G. K. Helmkamp, E. A. Helmkamp 2007-9-30 13044 Sutter Sacramento Valley: Oak Ave, at its junction with CA-99, about 2.8 miles north of the Feather River crossing. 7 Comment
  UCR101138  Trichoptilium incisum George K. Helmkamp, E. A. Helmkamp 1998-3-19 2956 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  SEINET238182  Trichostema parishii George K. Helmkamp 1998-6-27 4084 Riverside Santa Rosa Mtns.: 3.3 mi S of Hwy 74 along Santa Rosa Mtn Rd. in vicinity of an unnamed spring. 1585 Comment
  CLARK-A1045-594  Tridens muticus George K. Helmkamp 1977-5-17 San Bernardino Mojave Desert Flynn 15'Q Comment
  UCR44830  Tridens muticus 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
  RSA0012135  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2011-7-7 17648 El Dorado Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  SD239884  Trientalis latifolia G. K. Helmkamp, E. A. Helmkamp 2012-6-13 19180 Nevada Northern Sierra Nevada Mountains Foothills: Washinton Road, 5.6 miles north of ties junction with CA-20 and along Washington Creek (Washington 7.5'Q) 787 Comment
  UCR130606  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 1999-5-21 4848 Monterey Santa Lucia Mountains, Willow Creek Rd 1.7 mi east of Calif. Hwy 1 north of Gorda 290 Comment
  UCR231105  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2011-9-16 18272 Calaveras Northern Sierra Nevada Mountains Foothills, Bald Mountain Road, 1.5 miles SW of Hunter Creek crossing, 7.3 miles NE of the junction of Blue Mountain Rd and Rail Road Flat Rd 1037 Comment
  UCR237344  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2012-6-13 19180 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 5.6 miles north of its junction with CA-20 and along Washington Creek 787 Comment
  UCD107936  Trifolium campestre G. K. Helmkamp; Elizabeth Helmkamp 2006-5-4 10298 El Dorado Northern Sierra Nevada. East end of Diamond Springs, 0.1 mile north of the junction of Pleasant Valley Road and Hwy CA-49. 543 Comment
  UCR123140  Trifolium campestre George K. Helmkamp, E. A. Helmkamp 2001-6-2 6766 San Mateo Central Coast, Pillar Point Harbor, about 4 miles north of Half Moon Bay 6 Comment
  SD255752  Trifolium ciliolatum George K. Helmkamp, Mary Alice Barnes 2013-5-13 20601 Amador Sierra Nevada Mountains; Shake Ridge Road, 16.7 miles northeast of its junction with E-16 via Fiddletown Road. 982 Comment
  UCR230969  Trifolium ciliolatum George K. Helmkamp, E. A. Helmkamp 2011-6-7 17472 Amador Northern Sierra Nevada Mountains Foothills, Sutter Creek Road, 3.4 miles west of Volcano 491 Comment
  UCD108375  Trifolium depauperatum var. depauperatum G. K. Helmkamp; E. A. Helmkamp 2007-3-17 11651 Calaveras Eastern Sacramento Valley. About 1 mile north of Burson on the road to south Comanche Reservoir. 152 Comment
  UCR142585  Trifolium depauperatum var. truncatum George K. Helmkamp, E. A. Helmkamp 2000-4-20 5422 San Luis Obispo Central Coast, road crest between See Canyon Road and Prefumo Canyon Road, SW of San Luis Obispo 320 Comment
  SD254627  Trifolium dubium George K. Helmkamp, Mary Alice Barnes 2013-5-17 20641 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 0.3 mile northeast of Paloma Road, SW of Mokelumne Hill. 505 Comment
  SEINET11261730  Trifolium dubium George Helmkamp, E. A. Helmkamp 2012-5-15 18973 Calaveras Northern Sierra Nevada Mountains Foothills: along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas (San Andreas 7.5' Q.); 0 387 Comment
  SEINET3282788 Image available Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2007-4-30 11894 El Dorado Foothills, Northern Sierra Nevada Mountains; hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR235444  Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2012-5-15 18973 Calaveras Northern Sierra Nevada Mountains Foothills, along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas 387 Comment
  UCR237309  Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2012-4-14 18760 Butte Northwestern Sacramento Valley, Cox Lane, 1.3 miles west of its intersection with La Loma Way, c. 10.3 mi. ENE (82 deg. ) of Gridley 91 Comment
  UCR120534  Trifolium fragiferum George K. Helmkamp, E. A. Helmkamp 2001-6-3 6807 Solano San Francisco Bay Region, Hammond Island SE of Fairfield. Grizzly Rd., 7.5 mi SE of entrance to wildlife preserve 6 Comment
  UCR15236  Trifolium fragiferum George K. Helmkamp 1975-7-27 s.n. San Luis Obispo Central Coast, Morro Bay at Chorro Creek Comment
  UCR24782  Trifolium fragiferum George K. Helmkamp 1981-6-21 s.n. San Luis Obispo Central Coast, N side of roadside corner where Turri Road ends at Morro Bay, between Morro Bay State Park and Baywood Park 9 Comment
  IRVC29192  Trifolium fragiferum G. K. Helmkamp, E. A. Helmkamp 2004-8-14 8781 San Luis Obispo junction of Thompson Rd. and Mehlschau Rd., NE of Nipomo Central Coast 107 Comment
  SBBG120618  Trifolium glomeratum G. K. Helmkamp with E. A. Helmkamp 2006-5-6 10302 Amador St Hwy 49, 0.3 mi S of Drytown 226 Comment
  UCR191050  Trifolium glomeratum George K. Helmkamp, E. A. Helmkamp 2007-6-8 12284 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 1.9 miles south of Mormon Emigrant Trail, at the bridge over Diamond Creek 1143 Comment
  UCR206841  Trifolium glomeratum George K. Helmkamp, E. A. Helmkamp 2009-5-24 14764 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 1.3 miles east of the Cosumnes River and CA-49 381 Comment
  SD248419  Trifolium hirtum George K. Helmkamp, Mary Alice Barnes 2013-5-3 20472 Placer Foothills, northern Sierra Nevada Mountains: Mosquito Ridge Road, 1.1 miles south of Forest Hill Road. 961 Comment
  SEINET3245949  Trifolium hirtum G. K. Helmkamp, E. A. Helmkamp 2010-1 15933 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot Hill 7.5') 157 Comment
  UCR188164  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2007-4-30 11881 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR198410  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2008-4-17 13297 Placer Sacramento Valley / Sierra Nevada Foothills, about 0.2 mile north of CA-193 on Fowler Road, about 6 miles east of Lincoln 93 Comment
  UCR208549  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2009-5-11 14677 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
  UCR217264  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2010-5-17 16072 El Dorado Sierra Nevada Mountains Foothills, Pine Hill Road, 0.8 mile above the junction with Bertana Court; edge of Pine Hill Ecological Reserve 610 Comment
  UCR218437  Trifolium hirtum George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16455 B El Dorado Sierra Nevada Mountains, Silver Fork Road, 1.9 miles south of its junction with US-50 in Kyburz 1473 Comment
  UCR14534  Trifolium longipes George K. Helmkamp 1974-6-9 s.n. Mono Owens Valley, Big Springs, on the Owens River 2195 Comment
  UCR176492  Trifolium longipes var. nevadense George K. Helmkamp, E. A. Helmkamp 2006-8-3 11144 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR194964  Trifolium microcephalum George K. Helmkamp, E. A. Helmkamp 2007-5-18 12027 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road, 4.2 miles southeast of Foresthill 793 Comment
  UCR24788  Trifolium monanthum var. grantianum George K. Helmkamp 1981-7-5 s.n. Riverside San Jacinto Mountains, spring alongside the Black Mountain Road, 6 mi from the Banning to Idyllwild Hwy (243) Comment
  SEINET4178611 Image available Trifolium obtusiflorum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17601 Amador Northern Sierra Nevada Mountains Foothills: along CA-26, 0.1 mile west of the Calaveras county line at the bridge over the North Fork Mokelumne River. 652 Comment
  UCR159838  Trifolium obtusiflorum George K. Helmkamp, E. A. Helmkamp 2005-6-12 9631 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR127125  Trifolium oliganthum George K. Helmkamp, E. A. Helmkamp 1998-5-19 3858 Monterey Reservoir area., San Antonio Rd 0.7 mi north of G-14 (Interlake Rd between San Antonio and Nacimiento reservoirs) 335 Comment
  SEINET7248287  Trifolium pratense George K. Helmkamp, Elizabeth Helmkamp 2013-1 22210 Alpine Northern Sierra Nevada Mountains: Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89. 1924 Comment
  UCD109407  Trifolium variegatum G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10997 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCR233007  Trifolium variegatum George K. Helmkamp, E. A. Helmkamp 2011-9-24 18335 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
  SD193291  Trifolium willdenovii G. K. Helmkamp, E. Helmkamp 2005-4-16 9344 Santa Barbara 1.1 mile south of Highway CA 166 on Miranda Pines Road. 526 Comment
  SEINET3828543  Trifolium willdenovii George K. Helmkamp, E. A. Helmkamp 2012-1 18977 Calaveras Northern Sierra Nevada Mountains Foothills: along Murray Creek Road (Murraydale Ln.), 1.4 miles east of pope Road in San Andreas (San Andreas 7.5') 387 Comment
  UCR59785  Trifolium wormskioldii 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
  SEINET3889060  Trillium angustipetalum George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10535 El Dorado Northern Sierra Nevada Mountains: Along Ice House Canyon Road, 10.6 mi. S of Wentworth Springs Road (just S of the Jones fork of Silver Creek and SE of Union Valley Reservoir) (Riverton 7.5' Q).; 0 1509 Comment
  UC2044606  Triphysaria eriantha George K. Helmkamp 2013-3-14 20171 Amador Central Sierra Nevada Foothills S edge of city of Plymouth; along CA-49, 1.1 miles southwest of its junction with Fiddletown Road. (Amador City 7.5' Q.) Comment
  UCR206357  Triphysaria eriantha subsp. eriantha George K. Helmkamp, E. A. Helmkamp 2009-3-11 14386 Placer Sacramento Valley, Ranch House Road, 0.2 mile south of Sheridan 37 Comment
  OBI81421  Triphysaria versicolor subsp. faucibarbata George K. Helmkamp, Amy Barnes 2013-3-28 20297 Placer Eastern Sacramento Valley; northwest side of junction of Riosa Road and Andressen Road, northeast of Sheridan 36 Comment
  UCR114348  Trisetum projectum George K. Helmkamp, E. A. Helmkamp 1997-9-8 2268 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR197278  Triteleia hyacinthina George K. Helmkamp, E. A. Helmkamp 2008-4-17 13295 Placer Sacramento Valley, Ranch House Road, 0.2 mile southeast of Sheridan 37 Comment
  UCR253517  Triteleia hyacinthina George K. Helmkamp, Amy Barnes 2014-4-7 22699 Sacramento Sacramento Valley, along CA-104/Twin Cities Rd., 0.7 mile west of the Amador County line 63 Comment
  UCR197637  Triteleia ixioides subsp. anilina George K. Helmkamp, E. A. Helmkamp 2008-6-9 13627 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
  UCR206041  Triteleia ixioides subsp. anilina George K. Helmkamp, E. A. Helmkamp 2009-6-10 14941 Shasta Southern Cascade Range, Alvord Road, 0.2 mile south of its junction with CA-44, junction is 1.1 miles east of Shingletown 938 Comment
  UCR249985  Triteleia ixioides subsp. scabra George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20944 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.8 mile north of Mormon Emigrant Trail and near Jim Quinn Spring, N of Carson Pass Hwy 2116 Comment
  UCR107335  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 1998-5-16 3734 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR184968  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 2007-4-23 11805 Amador Foothills, Northern Sierra Nevada Mountains, junction of Tonzi Road and Calif. Hwy 124 about 7 miles north of Ione 229 Comment
  UCR219272  Triteleia montana George K. Helmkamp, E. A. Helmkamp 2010-7-13 16542 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2492 Comment
  UCR218172  Triticum aestivum George K. Helmkamp, E. A. Helmkamp 2010-5-31 16174 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 2.8 miles east of the village of Sutter Creek 427 Comment
  UCR48048  Tropidocarpum gracile George K. Helmkamp 1987-3-24 s.n. San Bernardino Western Mojave Desert, SW base of Fremont Peak, about 6.5 mi east of US Hwy 395 976 Comment
  SD241206  Valerianella locusta George K. Helmkamp, E. A. Helmkamp 2012-5-15 18978 Calaveras Northern Sierra Nevada Mountains Foothills: along Murray Creek Road (Murraydale Lane), 1.4 miles east of Pope Road in San Andreas (San Andreas 7.5'Q) 387 Comment
  UCD137665  Valerianella locusta G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10341 Amador Northern Sierra Nevada: Grass Valley Creek, 1.2 miles east of Pine Grove along Hwy CA-88. 762 Comment
  UCR123962  Vancouveria hexandra George K. Helmkamp, E. A. Helmkamp 2001-7-8 6968 Humboldt North Coast, CA Hwy 36, along the Van Duzen River, 19.6 mi east of CA Hwy 101, west of Bar W Road 137 Comment
  UCR160969  Venegasia carpesioides George K. Helmkamp 2004-5-2 8560 Santa Barbara Southern Central Coast, Santa Ynez Mountains, Canada del Refugio Rd., 5. mi N of US-101 488 Comment
  UCR176369  Veratrum californicum var. californicum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10983 El Dorado Northern Sierra Nevada Mtns, Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50 2104 Comment
  UCR229482  Veratrum californicum var. californicum George K. Helmkamp, E. A. Helmkamp 2011-7-26 17884 Nevada Northern Sierra Nevada Mountains, along CA Hwy 20, 0.8 mi. east of Bowman Lake Road, 1.23 mi. NE (50 deg. ) of Emigrant Gap and 0.35 mi. N of I-80 1541 Comment
  UCR257898  Verbascum thapsus George K. Helmkamp, Amy Barnes 2014-8-27 23065 Mono Northern Sierra Nevada Mountains, Monitor Pass along CA-89, 4.7 miles west of the junction with CA-395 2040 Comment
  UCR219118  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2009-8-30 15551 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
  UCR235409  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2011-11-28 18482 Placer Sacramento Valley, North Brewer Road, 0.2 mile north of Nicolaus Road, 8.7 mi. west of Lincoln 29 Comment
  UCR250279  Veronica George K. Helmkamp 2013-3-14 20170 Amador Central Sierra Nevada Foothills, S edge of city of Plymouth; along CA-49, 1.1 miles southwest of its junction with Fiddletown Road 319 Comment
  SEINET1004400  Veronica arvensis George K. Helmkamp 2004-1 8256 San Luis Obispo Central Coast: SE of Oceano along Halcyon Rd., just E of mesa View Dr. 76 Comment
  UCD124671  Veronica arvensis G. K. Helmkamp; Elizabeth Helmkamp 2006-4-27 10240 El Dorado Northern Sierra Neveda foothills, Junction of French Creek Road and Big Canyon Road, 0.5 mi. south of Frenchtown. 340 Comment
  SEINET235764 Image available Veronica persica G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3631 Fresno Coast Range: Warthan Creek Canyon along CA Hwy 198 27.6 mi. W of Intersate 5 W of Coalinga. 457 Comment
  SD239932  Veronica serpyllifolia subsp. humifusa Georg K. Helmkamp, E. A. Helmkamp 2011-6-9 17499 Nevada Northern Sierra Nevada Mountains Foothills: Tyler Foote Crossing Road, 1.6 miles north of its junction with Grizzley Hill Road, generally north of North Columbia. 929 Comment
  UCD124901  Veronica serpyllifolia subsp. humifusa G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-10 10698 El Dorado Northern Sierra Nevada Mountains; Ice House Road at the turnoff to Loon Lake. 1982 Comment
  RSA791378  Vicia americana George K. Helmkamp, E. A. Helmkamp 2012-5-18 19013 El Dorado Along Mormon Emigrant Trail, 0.1 mi east of Pebble Canyon Road, Southeast of Pollock Pines, South of US Hwy 50. 1495 Comment
  UCR206951  Vicia americana George K. Helmkamp, E. A. Helmkamp 2009-5-28 14823 Yuba Sierra Nevada Mountains Foothills, along CA-49, 0.5 mile north of the Camptonville exit 805 Comment
  UCR161680  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2005-5-17 9499 San Luis Obispo Central Coast, 2.5 mi WNW of San Simeon; along Calif. Highway 1 11 Comment
  UCR233055  Vicia benghalensis George K. Helmkamp, E. A. Helmkamp 2011-5-12 17267 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  SBBG129235  Vicia hirsuta G. K. Helmkamp, E. A. Helmkamp 2013-5-24 20707 Calaveras N side of Mokelumne River, W of Big Bar Rd and the CA-49 bridge 198 Comment
  SBBG133755  Vicia hirsuta G. K. Helmkamp, E. A. Helmkamp 2012-5-5 18916 Placer Lake Clementine Rd, 1.2 mi W of its jct with Foresthill Rd, 0.3 air mi SE (123 deg) of Clementine Dam on the American River 396 Comment
  SEINET4691418  Vicia sativa subsp. nigra George K. Helmkamp, E. A. Helmkamp 2011-1 17106 Calaveras San Joaquin Valley: along Warren Road near Long Horn Ct., 0.4 mile north of junction with CA-26. 56 Comment
  UCR197257  Vicia sativa subsp. nigra George K. Helmkamp, E. A. Helmkamp 2008-4-11 13268 Calaveras Sierra Nevada Mountains Foothills, junction of Fricot City Road and Calavaritas Road, southeast of the city of San Andreas 433 Comment
  UCR207127  Vicia sativa subsp. nigra George K. Helmkamp, E. A. Helmkamp 2009-4-4 14490 El Dorado Sierra Nevada Mountains Foothills, 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
  UCR250700  Vicia sativa subsp. nigra George K. Helmkamp, Mary Alice Barnes 2013-5-10 20542 El Dorado Northern Sierra Nevada Mtns. Foothills, Volcanoville Road (end of maintained road), 5.1 miles northwest of Bear Foot Road, at site of Volcanoville 960 Comment
  UCR131866  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2000-6-18 5764 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR173726  Vicia sativa subsp. sativa George K. Helmkamp, Elizabeth Helmkamp 2006-4-7 10176 El Dorado Northern Sierra Nevada Foothills, E of Sacramento, between N and Middle Forks of the Cosumnes River; Sand Ridge Road, 3.1 mi. east of Calif. Hwy 49 534 Comment
  UCR174001  Vicia sativa subsp. sativa George K. Helmkamp, Elizabeth Helmkamp 2006-5-9 10336 Amador Northern Sierra Nevada foothills, Grass Valley Creek, 1.2 miles east of Pine Grove along Calif. Hwy 88 762 Comment
  UCR187523  Vicia sativa subsp. sativa George K. Helmkamp 1996-5-27 1101 San Luis Obispo Central Coast, Los Osos, northeast of the corner of Martingale Avenue and Buckskin Drive 61 Comment
  UCR217920  Vicia sativa subsp. sativa George K. Helmkamp, Laurel Bezdecheck 2010-5-28 16104 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 4.7 miles east of its junction with Perry Creek Road, c. 3.5 air mi. ESE (96 deg. ) of Fair Play 942 Comment
  UCR88711  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 1995-6-20 95-2- 27 San Luis Obispo Central Coast, Bear Creek Ranch, 6 miles SE of Los Osos on Clark Valley Road 400 Comment
  UCD108798  Vicia tetrasperma G. K. Helmkamp; E. A. Helmkamp 2001-6-2 6769 San Mateo Central CA coast: Purissima Road. E of Half Moon Bay, 1.9 miles E of CA-1. 168 Comment
  UCD109122  Vicia villosa subsp. varia G. K. Helmkamp; E. A. Helmkamp 2007-4-20 11758 El Dorado Northern Sierra Nevada Mountains: junction of French Creek Road and Lost Creek road just north of Frenchtown. 366 Comment
  UCD109124  Vicia villosa subsp. varia G. K. Helmkamp; E. A. Helmkamp 2007-4-30 11902 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving from CA-49, 3.4 miles northwest of Placerville. 511 Comment
  UCR188022  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2007-4-30 11902 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  UCR197814  Vicia villosa subsp. varia George K. Helmkamp, E. A. Helmkamp 2008-5-8 13431 Amador Sierra Nevada Mountains Foothills, along CA-26, 1.0 mile west of the Calaveras County line 709 Comment
  SEINET269268  Vicia villosa subsp. varia G. Helmkamp, E. Helmkamp 1995-6-20 95- 2 -18 San Luis Obispo Bear Creek Ranch SE of Los Osos. 6 mi SE of Los Osos on Clark Valley Rd. 396 Comment
  SD241030  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2012-4-14 18767 Butte Northwestern Sacramento Valley: Entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River. 46 Comment
  SD247436  Vicia villosa subsp. villosa George Helmkamp, Elizabeth Helmkamp 2013-8-4 22178 Alpine Northern Sierra Nevada Mountains: along CA-89, 0.6 mile south of Markleeville (Markleeville 7.5'Q) 1691 Comment
  UCR250890  Vicia villosa subsp. villosa George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20678 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
  UCR257708  Vicia villosa subsp. villosa George K. Helmkamp, Mary Alice Barnes 2013-4-30 20438 El Dorado Sierra Nevada Mountains, Mormon Emigrant Trail, 70 meters northwest of its junction with Park Creek Road, 1 mile NW of Bryants 1311 Comment
  UCR131359  Viguiera laciniata George K. Helmkamp, E. A. Helmkamp 1999-4-16 4672 San Diego Sweetwater River Drainage, Japatul Rd 1/2 mi SE of Loveland Reservoir. 488 Comment
  CLARK-A1045-21  Viguiera reticulata George K. Helmkamp 1977-4-23 Inyo Panamint Mountains dry wash south of Emigrant Pass; 1066 Comment
  UCR218760  Viola bakeri George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16561 El Dorado Northern Sierra Nevada Mountains, southeast side of Wright's Lake, 5.8 mi. NE (34 deg. ) of Kyburz 2085 Comment
  SEINET3238906 Image available Viola douglasii George K. Helmkamp, E. A. Helmkamp 2008-4-30 13354 El Dorado Sierra Nevada Mountains Foothills; along Bear Creek Road, 0.2 mile southeast of its junction with Meadow Brook Road, south of Georgetown. 696 Comment
  CAS-BOT-BC520361  Viola lobata var. lobata George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20727 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy CA-20, 1.6 mi NE of Pine Flat Way, N of Scotts Flat Reservoir 1188 Comment
  UCR173795  Viola lobata var. lobata George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10598 El Dorado Northern Sierra Nevada foothills, Mormon Emigrant Trail, 6.0 miles east of its junction with Sly Park Road (Jenkinson Lake) 1055 Comment
  UCR173910  Viola macloskeyi George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10755 El Dorado Northern Sierra Nevada Mountains, 8 miles east of Ice House Road on the road to Wright's Lake 2000 Comment
  UCR190596  Viola pedunculata George K. Helmkamp, E. A. Helmkamp 2005-3-30 9248 San Luis Obispo Outer South Coast Ranges, Pozo Road, 0.9 mi east of Hi Mountain Road, north side of Garcia Mountains 460 Comment
  SD243218  Viola pinetorum subsp. pinetorum George K. Helmkamp, E. A. Helmkamp 2010-7-28 16676 Placer Northern Sierra Nevada Mountains: Robinson Flat campground near the junction of Forest Hill Road and Soda Springs Road, 27 miles northwest of the city of Foresthill. 2040 Comment
  UCR184800  Viola pinetorum subsp. pinetorum George K. Helmkamp, E. A. Helmkamp 2007-5-9 11972 El Dorado Northern Sierra Nevada Mountains, Granite Springs Road 0.4 mile east of its junction with Ice House Road, junct. about 4 miles southwest of Ice House 1707 Comment
  UCR256825  Viola pinetorum subsp. pinetorum George K. Helmkamp, Amy Barnes 2014-5-14 22872 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 0.1 mile east of Pebble Canyon Drive, 6.25 air mi. SW (217 deg. ) of Kyburz 1832 Comment
  SBBG133739  Woodsia oregana G. K. Helmkamp, E. A. Helmkamp 2011-6-9 17550 Sierra 7.1 mi N of Camptonville along St Hwy 49, ca. 2.5 mi N of the Yuba Co line 808 Comment
  UCR218983  Wyethia angustifolia George K. Helmkamp, Laurel Bezdecheck 2010-6-19 16319 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
  UCR134698  Xanthium spinosum George K. Helmkamp 2003-9-19 8153 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR201544  Xanthium spinosum George K. Helmkamp, E. A. Helmkamp 2008-10-30 14290 Sacramento Southern Sacramento Valley, along Highway E13 (Twin Cities Road) 4.4 miles west of its junction with CA-99 5 Comment
  UCR219065  Xanthium strumarium George K. Helmkamp, E. A. Helmkamp 2009-8-28 15541 Sacramento Northern Sacramento Valley, along Latrobe Road, 3.2 miles west of the El Dorado County line, 1 mi. due north of Rancho Murieta 73 Comment
  UCR240727  Xanthium strumarium George K. Helmkamp, E. A. Helmkamp 2012-10-5 19965 Amador Northern Sierra Nevada Mountains Foothills, beside Sutter Creek along the Sutter Creek-Volcano Road, 0.6 mile southwest of Meadowlark Lane 421 Comment
  UCD121473  Zeltnera exaltata G. Helmkamp 1993-9-22 34 -16 San Bernardino Burns Canyon, 6.7 mi up from junction of Pioneer Town and Pipes Cyn Rds. 1524 Comment



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