Search Results — 2000 specimen records retrieved (1974 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
  UCR207002  Abies magnifica var. magnifica George K. Helmkamp, E. A. Helmkamp 2009-7-2 15087 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 Comment
  UCR161900  Acacia longifolia George K. Helmkamp, E. A. Helmkamp 2005-2-12 8896 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park, 765 Mesa View Drive, along Calif. Highway 1, 0.3 mi south of Mesa View Drive SE of Oceano/Arroyo Grande 79 Comment
  UCR130989  Acamptopappus shockleyi George K. Helmkamp, E. A. Helmkamp 1998-5-3 3526 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  UCD117023  Acer macrophyllum G. K. Helmkamp; E. A. Helmkamp 2007-9-26 13014 El Dorado northern Sierra Nevada Mountains, Bonetti Road, 1.1 miles south of its junction with Mormon Emigrant Trail, just east of Jenkinson Lake. 1189 Comment
  UCR196841  Acer macrophyllum George K. Helmkamp, E. A. Helmkamp 2008-6-3 13565 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
  SD236155  Acer negundo var. californicum G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14224 Sutter Sacramento Valley: Pass Road at the south side of Sutter Buttes, beside Butte Slough, 9.2 miles west of Sutter 32 Comment
  UCR106722  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 1998-5-18 3798 Santa Clara Central Coast Range, E of San Jose; Kincaid Road 1.1 mi north of Mt. Hamilton Road. ( =Calif. Hwy 130) 793 Comment
  UCR170827  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2005-9-30 9962 Placer Northern Sierra Nevada Mtns., Junction of Chalet and Alpine Meadows Roads west of Calif. Highway 89 (near Alpine ski area) 2081 Comment
  UCR190556  Achillea millefolium George K. Helmkamp 2007-6-29 12455 Amador Northern Sierra Nevada Mountains, south side of CA-88, 0.2 mile west of Carson Spur summit 2421 Comment
  UCR205146  Achillea millefolium George K. Helmkamp, E. A. Helmkamp 2008-10-14 14252 Colusa Sacramento Valley, along CA-20, 0.2 mile east of the Sutter County line 9 Comment
  SEINET7354054  Achillea millefolium George K. Helmkamp 2009-1 15004 Shasta Shingletown, Southern Cascade Range Foothills: Wilson Hill Road 2.4 miles south of its junction with CA-44 in Shingletown (Shingletown 7.5' Q. +- 1000 m.) Oak woodland with many grassy (introduced) openings. Disturbed roadside soil. 857 Comment
  UCR240697  Achnatherum nelsonii subsp. dorei George K. Helmkamp, E. A. Helmkamp 2012-9-1 19748 Calaveras Northern Sierra Nevada Mountains Foothills, along Winton Road, 0.3 mile east of its junction with Lily Gap Road, 6.4 miles NE (66 deg. ) of West Point 1314 Comment
  SEINET3282798 Image available Achnatherum occidentale subsp. californicum George K. Helmkamp, E. A. Helmkamp 2009-8-12 15451 Placer Sierra Nevada Mountains; Forest Hill Road at Robinson Flat, 27 miles northeast of the city of Foresthill. 2061 Comment
  UCR122348  Achnatherum occidentale subsp. occidentale George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5894 Mono Sierra Nevada Mountains., West side of Lake Mary, southwest of Mammoth Lakes 2652 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
  UCR252798  Achnatherum occidentale subsp. pubescens George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22090 El Dorado Northern Sierra Nevada Mountains, Mehrten Spring Road, 0.5 mile north of CA-88/Carson Pass Hwy 1793 Comment
  UCR103321  Achyronychia cooperi George K. Helmkamp, E. A. Helmkamp 1998-2-5 2651 Riverside Sonoran (Colorado) Desert, Indio Hills, 3 mi. east of Thousand Palms & 1.1 mi. N on Amity Rd. 101 Comment
  CAS-BOT-BC257957  Acmispon americanus var. americanus George K. Helmkamp; E. A. Helmkamp 2011-8-19 18157 Alpine Northern Sierra Nevada Mountains: Blue Lakes Road, 2.6 miles north of its junction with Tamarack Road 2436 Comment
  SEINET7249210  Acmispon americanus var. americanus G. K. Helmkamp, E. A. Helmkamp 2012-1 19917 Placer Northern Sierra Nevada Mountains; junction of Nyack Road and I-80 in the Emigrant Gap area 1652 Comment
  UCD104061  Acmispon brachycarpus G. K. Helmkamp; E. A. Helmkamp 2006-10-10 11520 Nevada Northern Sierra Mountains Foothills: along Hwy. CA-49, 5.8 miles NNW of Nevada City. 750 Comment
  HSC79223  Acmispon heermannii G. K. Helmkamp 1984-4-29 - 27 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
  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
  SD237568  Aconogonon davisiae G. K. Helmkamp 2007-7-7 12512 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 12.0 miles south of its junction with CA-88 (Carson Pass 7.5'Q) 2549 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
  SEINET11261908  Actaea rubra George Helmkamp, E. A. Helmkamp 2011-7-30 17941 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 (Caldor 7.5' Q.); 0 1209 Comment
  UCD128528  Adenocaulon bicolor G. K. Helmkamp; E. A. Helmkamp 2006-8-24 11274 El Dorado Northern Sierra Nevada Mountains Foothills. Ice House Road, 2.3 miles S of Union Reservoir Road. 1552 Comment
  UCR170812  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2005-8-9 9781 El Dorado Northern Sierra Nevada Foothills, WSW of Lake Tahoe; NE of Union Valley Reservoir along Ice House Road 1576 Comment
  UCR234185  Adenocaulon bicolor George K. Helmkamp, E. A. Helmkamp 2010-9-23 16961 El Dorado Northern Sierra Nevada Mountains, Forest Route 31, 3.9 miles north of its junction with Peavine Ridge Rd and Round Tent Canyon Road 1457 Comment
  SD224836  Adenophyllum cooperi G. K. Helmkamp, E. A. Helmkamp 1998-3-16 2832 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
  UCR104820  Adenostoma fasciculatum George K. Helmkamp 1997-6-21 2063 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 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
  UCR256486  Adenostoma fasciculatum George K. Helmkamp, Amy Barnes 2014-5-8 22839 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
  UCR123954  Adiantum aleuticum George K. Helmkamp, E. A. Helmkamp 2001-7-8 6969 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
  SEINET3860417 Image available Adiantum jordanii George K. Helmkamp, Mary Alice Barnes; Mary Jane Ganibe 2010-7-2 16437 Placer Sierra Nevada Mountains Foothills: Iowa Hill Road, 1.9 miles southeast of its junction with Canyon Way Colfax.; 0 415 Comment
  UCD137194  Adiantum jordanii G. K. Helmkamp; E. A. Helmkamp 2006-6-7 10645 El Dorado Foothills, Northern Sierra Nevada Mountains: hiking trail, 3.4 miles northwest of Placerville along Hwy CA-49. 512 Comment
  UCR173827  Adiantum jordanii George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-7 10645 El Dorado Northern Sierra Nevada foothills, hiking trail, 3.5 miles northwest of Placerville along Calif. Hwy 49 512 Comment
  CAS-BOT-BC444016  Aegilops cylindrica George K. Helmkamp; Elizabeth Helmkamp 2013-6-19 20884 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
  SD239518  Aegilops triuncialis G. K. Helmkamp, E. A. Helmkamp 2011-7-17 17789 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road just northeast of its junction with CA-174, 1.25 miles East (91a^z) of Peardale (Chicago Park 7.5'Q) 778 Comment
  UCR249890  Aegilops triuncialis George K. Helmkamp, Mary Alice Barnes 2013-5-17 20639 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26, 0.3 mile northeast of Paloma Road, SW of Mokelumne Hill 505 Comment
  UCR174286  Aesculus californica George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-7 10650 El Dorado Northern Sierra Nevada foothills, hiking trail, 3.5 miles northwest of Placerville along Calif. Hwy 49 512 Comment
  SD241067  Agastache urticifolia George K. Helmkamp, E. A. Helmkamp 2010-8-26 16841 Nevada Northern Sierra Nevada Mountains: South Fork Yuba River, Forest Route 85 (Fordyce Lake Road) north of Hampshire Rocks Road and I-80, 1 mile NNW (351a^z) of Cisco (Cisco Grove 7.5') 1634 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
  RSA0042824  Agoseris glauca var. laciniata George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-19 20885 El Dorado Mormon Emigrant Trail, 8.3 miles east of its junction with Hwy E-16 at Jenkinsons Lake 1456 Comment
  CLARK-A1045-1188  Agoseris glauca var. monticola George K. Helmkamp 1977-9-1 VB Alpine Sierra Nevada dry slope under pines; ; Freel Peak 7.5'Q 2346 Comment
  SD148258  Agoseris grandiflora G. K. Helmkamp, E. A. Helmkamp 2001-5-2 6602 San Luis Obispo La Panza Range; California Highway 58, 4.5 miles east of Santa Margarita. 334 Comment
  UCR129524  Agoseris heterophylla George K. Helmkamp, E. A. Helmkamp 1998-5-20 4026 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
  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
  UCR57525  Agrostis exarata 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
  SEINET7249201  Agrostis exarata George K. Helmkamp, Elizabeth Helmkamp 2013-1 Placer Comment
  RSA0011965  Agrostis idahoensis George K. Helmkamp, E. A. Helmkamp 2011-9-1 18235 El Dorado Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  SEINET13384097 Image available Agrostis idahoensis George K. Helmkamp, Amy Barnes 2012-1 19636 Alpine Northern Sierra Nevada Mountains: north side of CA-88/Carson Pass Hwy, 0.4 mile east of its junction with Kirkwood Meadows Drive 2356 Comment
  UCR241359  Agrostis idahoensis George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19816 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 10.8 miles northeast of Hidden Treasure Road, 0.75 mi. SE of Whisky Hill 1698 Comment
  SEINET269157  Agrostis scabra G. Helmkamp 1994-7-28 105 -2 Mono Long Valley. Roadside cut along US-395 1.3 mi E of South Landing turnoff to Crowley Lake. 2103 Comment
  UCD56648  Agrostis scabra G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11187 A El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road. 2250 Comment
  UCD67046  Agrostis scabra G. K. Helmkamp; E. A. Helmkamp 2006-8-24 11276 El Dorado Northern Sierra Nevada Mountains: Ice House Road, 2.3 miles south of Union Reservoir Road. 1552 Comment
  UCR176474  Agrostis scabra George K. Helmkamp, E. A. Helmkamp 2006-8-7 11187 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  UCR252985  Agrostis scabra George K. Helmkamp, Amy Barnes 2013-9-23 22322 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  CAS-BOT-BC444035  Agrostis stolonifera George K. Helmkamp; E. A. Helmkamp 2007-8-16 12770 Amador Northern Sierra Nevada Mountains: along Hwy CA-88, 0.9 mile northeast of the junction with Bear River Reservoir. 632 Comment
  UCR240952  Agrostis stolonifera George K. Helmkamp, E. A. Helmkamp 2012-9-25 19904 Placer Northern Sierra Nevada Mountains, Blue Canyon Road, 1.1 miles south of its intersection with I-80, c. 1/2 mi. south of Blue Canyon-Nyack Airport 1473 Comment
  UCR252988  Agrostis stolonifera George K. Helmkamp, Amy Barnes 2013-9-23 22325 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  SEINET3817927 Image available Agrostis variabilis George K. Helmkamp, E. A. Helmkamp 2010-9-23 16958 El Dorado Northern Sierra Nevada Foothills, Forest Route 31, 3.4 miles north of its junction with Peavine Ridge Road and Round Tent Canyon Road (Riverton 7.5' Q. 1463 Comment
  SEINET4137606 Image available Agrostis variabilis George K. Helmkamp, E. A. Helmkamp 2010-9-1 16909 Amador Northern Sierra Nevada Mountains: Dufrene Road 0.7 mile east of junction with CA-88, north of Lower Bear River Reservoir 2044 Comment
  CAS-BOT-BC334215  Aira caryophyllea George K. Helmkamp; Laurel Bezdecheck 2010-5-29 16121 El Dorado Sierra Nevada Mountains foothills: Slug Gulch Road, 4.7 rd miles E of its junction with Perry Creek road, air 3.9 mi ESE (90 deg. ) of Fair Play 1082 Comment
  SD212419  Aira caryophyllea G. K. Helmkamp, Elizabeth Helmkamp 2006-5-1 10283 El Dorado Northern Sierra Nevada foothills; corner of Pleasant Valley Road and Patterson Drive; west end of Diamond Sprin gs. 537 Comment
  SEINET3817926 Image available Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 2011-4-10 17166 Yuba Sacramento Valley, Along Camp Beale Highway/Spenceville Rd., c. 1.75 miles northeast of Wheatland (Wheatland 7.5' Q. 44 Comment
  UCD55731  Aira caryophyllea G. K. Helmkamp; Elizabeth Helmkamp 2006-5-1 10283 El Dorado Northern Sierra Neveda foothills, corner of Pleasant Valley Road and Patterson Drive; W end of Diamond Springs. 536 Comment
  UCR107263  Aira caryophyllea George K. Helmkamp, E. A. Helmkamp 1998-5-16 3693 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
  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
  UCR123167  Allium amplectens George K. Helmkamp, E. A. Helmkamp 2002-4-19 7469 San Luis Obispo Central Coast, 3.2 mi north of Piedras Blancas Lighthouse along CA Hwy 1 15 Comment
  UCR256660  Allium amplectens George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20721 Nevada Northern Sierra Nevada Mountains Foothills, along Hwy CA-20, 3.5 miles west of CA-49 in Grass Valley 623 Comment
  UCR176391  Allium campanulatum George K. Helmkamp, E. A. Helmkamp 2006-8-7 11176 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road 2250 Comment
  UCR197036  Allium campanulatum George K. Helmkamp, E. A. Helmkamp 2008-7-16 13820 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR249991  Allium campanulatum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20920 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, north side of its junction with Mormon Emigrant Trail 2188 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
  CLARK-A1045-567  Allium monticola George K. Helmkamp 1979-6-5 #2 San Bernardino San Bernardino Mountains dry slope; ; Keller Peak 7.5'Q Comment
  UCR160747  Allium peninsulare var. peninsulare George K. Helmkamp, E. A. Helmkamp 2001-5-2 6656 A Kern Temblor Range, [dirt road 0.45 km south of] Calif. Hwy 58, very near the San Luis Obispo Co. line 427 Comment
  UCR179348  Allium validum George K. Helmkamp, E. A. Helmkamp 2006-9-12 11378 El Dorado Northern Sierra Nevada Mountains, Along Calif. Hwy 89, 1.2 miles west of the Alpine County line. General area of Luther Pass and Grass Lake 2363 Comment
  UCR88339  Allium validum George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 6 -4 Alpine Sierra Nevada Mtns, Calif. Hwy 89, 6.0 mi east of the junction with Calif. Hwy 4 on the way to Monitor Pass. Slope above Monitor Creek 2200 Comment
  CLARK-A1045-195  Allophyllum divaricatum George K. Helmkamp 1978-6-6 San Bernardino San Bernardino Mountains San Bernardino N 7.5'Q Comment
  CLARK-A1045-196  Allophyllum divaricatum George K. Helmkamp 1978-6-6 San Bernardino San Bernardino Mountains San Bernardino N 7.5'Q Comment
  UCR208334  Allophyllum divaricatum George K. Helmkamp, E. A. Helmkamp 2009-4-21 14544 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR233672  Allophyllum divaricatum George K. Helmkamp, E. A. Helmkamp 2011-8-6 17954 Amador Northern Sierra Nevada Mountains, Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  SEINET2442069  Allophyllum gilioides George K. Helmkamp 2007-7-7 12468 El Dorado Northern Sierra Nevada Mountains: along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area.; 0 2033 Comment
  UCR219024  Allophyllum gilioides George K. Helmkamp, E. A. Helmkamp 2010-6-23 16350 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
  RSA0012228  Allophyllum integrifolium George K. Helmkamp, E. A. Helmkamp 2011-7-19 17834 Tuolumne Forest Route 5N14, 1.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1143 Comment
  SD239870  Allophyllum integrifolium G. K. Helmkamp, E. A. Helmkamp 2011-8-6 17952 Amador Northern Sierra Nevada Mountains: Ellis Road, 2.1 miles south of its junction with CA-88 (Peddler Hill 7.5'Q) 1794 Comment
  UCR14432  Allophyllum integrifolium George K. Helmkamp 1974-6-22 s.n. San Bernardino San Bernardino Mtns, Keller Peak Road 2134 Comment
  UCD109967  Alnus incana subsp. tenuifolia G. K. Helmkamp; E. A. Helmkamp 2007-5-31 12248 El Dorado Northern Sierra Nevada Mountains; Forestry Route 42, 4.3 miles west of its junction with Wright's Lake Road, generally between Wright's Lake and Ice House Reservoir. 1753 Comment
  UCR170982  Alnus rhombifolia George K. Helmkamp, E. A. Helmkamp 2006-1-16 10052 El Dorado Northern Sierra Nevada Foothills, Corner of Pleasant Valley Road and Patterson Drive, at the W end of Diamond Springs 537 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
  UCR200938  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2008-9-30 14182 Calaveras Foothills, northern Sierra Nevada Mountains, along CA-49, 1.9 miles south of Mokelumne Hill 381 Comment
  UCR232615  Amaranthus albus George K. Helmkamp, E. A. Helmkamp 2011-10-8 18374 B 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
  SD237281  Amaranthus retroflexus G. K. Helmkamp, E. A. Helmkamp 2009-8-30 15546 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86a^z) of Nicolaus. 7 Comment
  UCR219188  Amaranthus retroflexus George K. Helmkamp, E. A. Helmkamp 2009-9-22 15640 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  UCR102611  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 1997-9-12 2415 Mono River Springs Lake, 3.1 mi. NE of Calif. hwy 120 on River Springs Rd. 1997 Comment
  UCR202681  Ambrosia acanthicarpa George K. Helmkamp, E. A. Helmkamp 2008-9-22 14149 Alpine Northern Sierra Nevada Mountains, Carson River Road running about parallel to CA-88, 2.2 miles east of its western junction with CA-88 1619 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
  RSA492927  Ambrosia eriocentra 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
  UCR173982  Amelanchier alnifolia var. pumila George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10686 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 10.6 miles south of Wentworth Springs Road (just south of the Jones Fork of Silver Creek) 1509 Comment
  SD232790  Amelanchier utahensis G. Helmkamp 1994-5-23 98 2 Alpine At the junction of highways US-4 and US-89. Along the east fork of the Carson River. Aspencottonwood area. 1768 Comment
  UCR161222  Amsinckia eastwoodiae George K. Helmkamp, E. A. Helmkamp 2005-3-5 9030 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
  SEINET13276745 Image available Amsinckia intermedia George K. Helmkamp 2014-1 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 (Smartsville 7.5' Q.) 264 Comment
  UCR233158B  Amsinckia intermedia George K. Helmkamp, E. A. Helmkamp 2010-3-20 15751 El Dorado Sierra Nevada Mountains Foothills, Marshall Road, 0.1 mile NE of its junction with CA-49 226 Comment
  UCR189469  Amsinckia retrorsa George K. Helmkamp, E. A. Helmkamp 2007-3-17 11658 Calaveras Eastern Sacramento Valley, Hwy CA-12 at Lime Creek road, east of Valley Springs 238 Comment
  UCR130684  Amsinckia spectabilis George K. Helmkamp, E. A. Helmkamp 1999-5-21 4839 Monterey Santa Lucia Mtns./Central Coast, Willow Creek, north of Gorda beside Calif. Hwy 1 30 Comment
  UCR122896  Amsinckia tessellata George K. Helmkamp, E. A. Helmkamp 2001-5-2 6651 Kern Temblor Range, [dirt road 0.45 km south of] Calif. Hwy 58, very near the San Luis Obispo Co. line 427 Comment
  UCR30073  Amsinckia tessellata George K. Helmkamp 1983-4-5 483 17 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  UCR122949  Amsinckia tessellata var. tessellata George K. Helmkamp, E. A. Helmkamp 2001-3-30 6458 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR123935  Amsinckia tessellata var. tessellata George K. Helmkamp, E. A. Helmkamp 2001-4-27 6549 Kern West end San Joaquin Valley, Como Rd., 1.9 mi SE of Calif. Hwy 58, NW of Taft 671 Comment
  RSA0081178  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2006-10-6 11479 Amador Along Calif. Hwy 49, 1.1 miles south of Plymouth. 314 Comment
  UCR218197  Anagallis arvensis George K. Helmkamp, E. A. Helmkamp 2010-5-31 16168 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 1.6 miles east of the village of Sutter Creek 412 Comment
  CAS-BOT-BC249053  Anaphalis margaritacea George K. Helmkamp; E. A. Helmkamp 2010-8-14 16792 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
  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
  SD237298  Anaphalis margaritacea G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15258 El Dorado Sierra Nevada Mountains: Wrights Lake Road, 4.1 miles north of its junction with US-50 and at the north side of Lyons Creek crossing. 2015 Comment
  UCD127126  Angelica breweri G. 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, Wood's Creek. 2509 Comment
  UCR121932  Antennaria rosea George K. Helmkamp, E. A. Helmkamp 2000-7-19 5934 Inyo Sierra Nevada Mountains, Mosquito Flat, 0.9 mi south of Rock Creek Lake, beside Rock Creek 3140 Comment
  UCR59790  Antennaria rosea George K. Helmkamp 1989-7-31 s.n. Mono Sierra Nevada Mtns, just south of Mammoth Village [in Mammoth Lakes] and at the edge of Snow Creek [Golf Course] 2439 Comment
  UCR209554  Antennaria rosea subsp. rosea George K. Helmkamp, E. A. Helmkamp 2009-8-4 15394 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
  UCR234571  Antennaria rosea subsp. rosea George K. Helmkamp, E. A. Helmkamp 2011-8-19 18130 Alpine Northern Sierra Nevada Mountains, northeast side of Lower Blue Lake, above campground 2500 Comment
  CDA36213  Anthemis cotula G. K. Helmkamp, E. A. Helmkamp 2009-5-2 14724 Yolo Western Sacramento Valley; Capay Valley; along CA Hwy 16, 1.5 miles west of Capay. Comment
  CAS-BOT-BC249065  Anthriscus caucalis George K. Helmkamp; E. A. Helmkamp 2012-4-14 18765 Butte Northwestern Sacramento Valley: entrance to Oroville Wildlife Area, 0.2 mile west of CA-70, near the Feather River 46 Comment
  UCR14945  Anthriscus caucalis George K. Helmkamp 1976-5-16 s.n. San Luis Obispo Central Coast, Hwy 1, Avila Beach turnoff Comment
  CLARK-A1045-408  Antirrhinum multiflorum George K. Helmkamp 1979-6-1 San Bernardino San Bernardino Mountains 1.5 mile west of City Creek Ranger Station; roadside cut; Harrison Mt. 7.5'Q Comment
  SBBG128998  Apocynum androsaemifolium G. K. Helmkamp, E. A. Helmkamp 2012-7-14 19402 Amador edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 mi N of Silver Lake 2317 Comment
  RSA0011959  Aquilegia formosa George K. Helmkamp, E. A. Helmkamp 2011-9-13 18249 El Dorado Mormon Emigrant Trail, 22.6 miles southeast of Jenkinson's Lake, between Silver Fork Road and Hwy 88, 0.2 mi. NNE (23deg.) of Alder Hill. 2274 Comment
  RSA0125861  Arabidopsis thaliana George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16305 El Dorado Mormon Emigrant Trail, 14 miles southeast of junction with Sly Park Road at Jenkinson Lake 1662 Comment
  SEINET3246133  Arabidopsis thaliana G. K. Helmkamp, E. A. Helmkamp 2007-1 11868 El Dorado Foothills, Northern Sierra Nevada Mountains: junction of Ice House Road, about 2 miles northwest of US-50 1029 Comment
  UCR207143  Arabidopsis thaliana George K. Helmkamp, E. A. Helmkamp 2009-4-4 14503 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 2.3 miles west of Bucks Bar Road 654 Comment
  UCR224233  Arabidopsis thaliana George K. Helmkamp, E. A. Helmkamp 2010-4-23 15929 El Dorado Sierra Nevada Mountains Foothills, Salmon Falls Road at the Salmon Falls crossing of the American River 157 Comment
  RSA0037293  Arabis George K. Helmkamp, Belinda Pesheck 2013-7-14 21038 Alpine off Blue Lakes Road, 9.4 miles south of CA-88, between a private dirt road and Charity Valley Creek 2409 Comment
  UCR248670  Arabis George K. Helmkamp, Belinda Pesheck 2013-7-14 21038 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
  UCR123398  Arabis divaricarpa George K. Helmkamp, E. A. Helmkamp 1998-8-12 4381 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR209687  Arabis glabra George K. Helmkamp, E. A. Helmkamp 2009-8-4 15385 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
  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
  UCR123399  Arabis holboellii var. pinetorum George K. Helmkamp, E. A. Helmkamp 1998-8-12 4383 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 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
  UCR110993  Arabis perennans George K. Helmkamp 1998-6-27 4112 Riverside Santa Rosa Mtns., 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), below Mountain Home Spring 1799 Comment
  UCR14650  Arabis perennans George K. Helmkamp 1975-6-6 s.n. San Bernardino Eastern Mojave Desert, Clark Mountain [area, Mescal Range], Mountain Pass, 0.5 mi south of Interstate 15 1463 Comment
  UCD117485  Arbutus menziesii G. K. Helmkamp; E. A. Helmkamp 2007-3-31 11728 Nevada Northern Sierra Nevada Mountains: Just south of the crossing of CA-49 over the South Yuba River. 390 Comment
  CAS-BOT-BC409997  Arceuthobium campylopodum L. Helmkamp; G. Helmkamp 1999-11-16 5 -1 Riverside San Jacinto Mountains, at the W end of Garner Valley, 0.5 miles E of CA-74 on Apple Canyon Road, just NE of Lake Hemet 1341 Comment
  SD236438  Arceuthobium campylopodum G. K. Helmkamp, E. A. Helmkamp 2008-7-22 13904 Alpine Eastern Sierra Nevada Mountains: junction of CA-88/89 and entrance to Crystal Springs campground, 1.2 miles southwest of Woodfords 1829 Comment
  UCR241358  Arctostaphylos manzanita George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19817 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 10.8 miles northeast of Hidden Treasure Road, 0.75 mi. SE of Whisky Hill 1698 Comment
  UCR190562  Arctostaphylos nevadensis George K. Helmkamp 2007-6-29 12415 Amador Northern Sierra Nevada Mountains, Shot Rock Vista picnic area along CA-88, 0.9 miles east of its junction with Mormon Emigrant Trail 2329 Comment
  RSA710338  Arctostaphylos rudis George K. Helmkamp 2004-2-19 8304 San Luis Obispo Central Coast: NW of Nipomo, Pomeroy Road, 0.2 mile N of Willow Road. 91 Comment
  SD236274  Arctostaphylos viscida subsp. mariposa G. K. Helmkamp, E. A. Helmkamp 2008-3-18 13192 Calaveras Sierra Nevada Mountains Foothills: Jesus Maria Road, 3.2 miles southeast of its junction with CA-26; beside Jesus Maria Creek. 319 Comment
  UCR171190  Arctostaphylos viscida subsp. mariposa George K. Helmkamp, E. A. Helmkamp 2006-3-26 10117 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; Rock Creek Road at Jaybird Creek, 5.1 mi east of Calif. Highway 193 (generally ENE of Chili Bar) 590 Comment
  UCR197261  Arctostaphylos viscida subsp. mariposa George K. Helmkamp, E. A. Helmkamp 2008-3-18 13192 Calaveras Sierra Nevada Mountains Foothills, Jesus Maria Road, 3.2 miles southeast of its junction with CA-26; beside Jesus Maria Creek 319 Comment
  UCR206670  Arctostaphylos viscida subsp. viscida George K. Helmkamp, E. A. Helmkamp 2009-3-5 14329 El Dorado Northern Sierra Nevada Mtns. Foothills, Happy Valley Cutoff road, 0.1 mile east of its junction with Mt. Aukum Road, south of Pleasant Valley 617 Comment
  UCR237555  Arctostaphylos viscida subsp. viscida George K. Helmkamp, E. A. Helmkamp 2012-4-24 18827 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Bear Creek Road and Meadow Brook Road, 2.5 mi. NE (59 deg. ) of Garden Valley 686 Comment
  UCR161217  Arenaria douglasii George K. Helmkamp, E. A. Helmkamp 2005-3-5 9033 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
  UCR178747  Arenaria kingii var. glabrescens George K. Helmkamp, E. A. Helmkamp 2006-8-30 11299 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of Calif. Hwy 88 and generally SE of Caples Lake 2521 Comment
  CLARK-A1045-535  Arenaria nuttallii subsp. gracilis George K. Helmkamp 1979-6-22 San Bernardino San Bernardino Mountains along Forest Service road 3N08 at junction with 3N66Y; sagebrush scrub opening in yellow pine forest; ; Big Bear City 7.5'Q 2285 Comment
  UCR191073  Arenaria serpyllifolia George K. Helmkamp, E. A. Helmkamp 2007-5-23 12056 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 11.1 miles northeast of Foresthill 1463 Comment
  SD144132  Aristida californica var. californica G. K. Helmkamp, E. Helmkamp 1998-1-24 2574 Imperial Between Hwy I-8 and the All-American Canal, across from the Brock Research Center (ca. 3 miles east of the junction of Hwy CA-98 with Hwy I-8) 46 Comment
  UCD129156  Arnica mollis G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11131 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
  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
  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
  RSA0012017  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2010-8-26 16826 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
  SD240838  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2011-10-13 18408 El Dorado Northern Sierra Nevada Mountains Foothills: Forebay Road, 9.1 miles northwest of Pollock Pines at the south side of the bridge over the South Fork American River (Pollock Pines 7.5'Q) 611 Comment
  UCD129310  Artemisia douglasiana G. K. Helmkamp; E. A. Helmkamp 2006-9-12 11394 Alpine Northern Sierra Nevada Mountains: west end of Caples Lake at a dam; alongside Hwy CA-88. 2335 Comment
  UCR188558  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2007-9-26 13020 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 2.3 miles east of Jenkinson Lake 1226 Comment
  UCR200920  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2008-9-9 14077 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
  UCR219650  Artemisia douglasiana George K. Helmkamp, E. A. Helmkamp 2009-11-3 15720 El Dorado Sierra Nevada Mountains Foothills, at a bridge on Grizzly Flat Road 8.0 miles east of its junction with Hwy E-16 at Somerset 925 Comment
  UCR176278  Artemisia ludoviciana subsp. incompta George K. Helmkamp, E. A. Helmkamp 2006-8-3 11130 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR240970  Artemisia ludoviciana subsp. ludoviciana George K. Helmkamp, E. A. Helmkamp 2012-10-5 19967 Amador Northern Sierra Nevada Mountains Foothills, beside Sutter Creek along the Sutter Creek-Volcano Road, 0.6 mile southwest of Meadowlark Lane 421 Comment
  UCD129377  Artemisia tridentata subsp. vaseyana G. K. Helmkamp; E. A. Helmkamp 2006-9-12 11392 Alpine Northern Sierra Nevada Mountains; along Hwy 88 at the crossing over the West Fork of the Carson River. 2363 Comment
  UCR233624  Asclepias cordifolia George K. Helmkamp, E. A. Helmkamp 2011-6-9 17507 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
  UCR202644  Asclepias fascicularis George K. Helmkamp 1990-9-3 s.n. San Luis Obispo Central Coast, north of the bay at Avila Beach 8 Comment
  UCR241348  Asclepias fascicularis George K. Helmkamp, E. A. Helmkamp 2012-9-20 19872 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
  UCR178733  Aster alpigenus var. andersonii George K. Helmkamp, E. A. Helmkamp 2006-8-30 11295 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of Calif. Hwy 88 and generally SE of Caples Lake 2521 Comment
  UCR252989  Aster alpigenus var. andersonii George K. Helmkamp, Amy Barnes 2013-9-23 22326 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  UCR230756  Aster eatonii George K. Helmkamp, E. A. Helmkamp 2010-10-1 17000 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 0.3 mile southwest of its junction with Quartz Mountain Road, 4.25 mi. NE (47 deg. ) of Sutter Creek 527 Comment
  SEINET13203146 Image available Aster foliaceus var. parryi George K. Helmkamp, Elizabeth Helmkamp 2013-1 22204 Alpine Northern Sierra Nevada Mountains: Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 (Ebbets Pass 7.5' Q.) 1923 Comment
  UCR257205  Aster foliaceus var. parryi George K. Helmkamp, Elizabeth Helmkamp 2013-9-7 22277 Amador Northern Sierra Nevada Mountains, Tragedy Spring Road, 0.17 mi. above junction with Hwy 88/Carson Pass Rd., at the entrance path to the spring 2425 Comment
  UCR170240  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9913 El Dorado Northern Sierra Nevada Foothills, Wright's Lake Road (Forest Road 4) c. 4.0 road miles north of US-50, NE of Kyburz 2061 Comment
  UCR176466  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2006-7-31 11073 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road (Forestry Route 4) at Lyons Creek, about 4 miles north of Hwy US-50 1864 Comment
  UCR196986  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2008-7-22 13866 Alpine Eastern Sierra Nevada Mountains, Blue Lake Road just southeast of its junction with CA-88 2180 Comment
  UCR232628  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2011-9-13 18246 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
  UCR233001  Aster occidentalis var. occidentalis George K. Helmkamp, E. A. Helmkamp 2011-9-24 18331 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
  UCR248375  Aster occidentalis var. occidentalis George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21016 Amador Northern Sierra Nevada Mountains, Plasse Road at the southern end of Silver Lake, off Hwy 88/Carson Pass Hwy 2191 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
  UCR258118  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-8-11 23010 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 Comment
  UCR258417  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-8-11 22989 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCR258989  Aster occidentalis var. occidentalis George K. Helmkamp, Amy Barnes 2014-9-16 23073 Alpine Eastern Sierra Nevada Mountains, Paynesville, junction of Chambers Lane and Diamond Valley Road along West Fork Carson River 1593 Comment
  UCR179334  Aster oregonensis George K. Helmkamp, E. A. Helmkamp 2006-8-24 11291 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 3.8 miles north of Wentworth Springs Road 1616 Comment
  UCR190231  Aster subulatus George 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
  UC2015627  Astragalus agrestis G. Helmkamp 1994-5-23 99 -2 Mono Along highway US-89, 1 mile south of the Alpine County line. Comment
  UCR242343  Astragalus bolanderi George K. Helmkamp, E. A. Helmkamp 2010-8-20 16817 El Dorado Northern Sierra Nevada Mountains, near abandoned Iron Mountain ski resort, road spur parallel to Mormon Emigrant Trail about 0.2 mile west of its junction with CA-88 2238 Comment
  CLARK-A1045-1216  Astragalus crotalariae George K. Helmkamp 1977-1-22 Imperial Salton Sea roadside ditch along State Highway 86 at Riverside County line; Oasis 7.5'Q Comment
  CDA26657  Astragalus douglasii var. douglasii G. K. Helmkamp, E. A. Helmkamp 1998-6-29 4180 Kern Tehachapi Mtns.; Tehachapi Mountain Park, 4.2 miles SW of Highline Rd. along Water Canyon Rd. Comment
  UCR130223  Astragalus douglasii var. douglasii George K. Helmkamp, E. A. Helmkamp 1998-6-27 4120 Riverside Santa Rosa Mountains., Santa Rosa Mountain Road, 5.8 miles southeast of Calif. Hwy 74 1799 Comment
  RSA615628  Astragalus inyoensis George K. Helmkamp 1997-9-30 2463 Inyo 6.1 mi. N of CA hwy 168 on White Mtn Rd. 2622 Comment
  CLARK-A1045-12  Astragalus layneae George K. Helmkamp 1977-4-21 San Bernardino Adelanto east of US Highway 395, 2 miles north of Adelanto; Creosote Bush scrub; ; Adelanto 7.5'Q 883 Comment
  SD144467  Astragalus lentiginosus G. K. Helmkamp, E. A. Helmkamp 1997-3-7 1372 Kern SE of Maricopa along Western Minerals Rd near Bitter Creek 427 Comment
  UCR129554  Astragalus lentiginosus var. ineptus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6820 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  CLARK-A1045-1236  Astragalus malacus George K. Helmkamp 1978-5-30 Mono Sierra Nevada near Conway Summit, along US Highway 395; Lundy 7.5'Q Comment
  UCR134417  Astragalus trichopodus var. phoxus George K. Helmkamp, E. A. Helmkamp 2001-4-29 6577 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  UCR140455  Astragalus trichopodus var. phoxus George K. Helmkamp 2004-4-21 8486 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 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
  UCR173490  Athysanus pusillus George K. Helmkamp, Elizabeth Helmkamp 2006-4-29 10270 El Dorado Northern Sierra Nevada Foothills, Rock Creek Road, 5.7 mi. east of Calif. Hwy 193, N of the South Fork of the American River 427 Comment
  SD143952  Atriplex G. Helmkamp, E. Helmkamp 1997-9-10 2349 Mono River Springs Lakes, 3.1 miles northeast of highway California 120 on River Springs Road. 2285 Comment
  RSA746968  Atriplex canescens subsp. canescens George K. Helmkamp, E. Helmkamp 2008-10-30 14303 Amador along CA-49, 0.2 mile south of Plymouth 314 Comment
  UCR194979  Atriplex canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2007-10-13 13102 Amador Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 0.6 mile south of Plymouth 314 Comment
  UCR219001  Atriplex canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2009-10-11 15678 Amador Sierra Nevada Mountains Foothills, along Hwy CA-49, 1.0 mile south of Plymouth, 1.3 mi. north of Drytown 303 Comment
  UCR253814  Atriplex micrantha George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20101 Placer Sacramento Valley, South Dowd Road, 0.1 mile south of its junction with Moore Road, southwest of Lincoln 34 Comment
  SEINET13262656 Image available Avena fatua George K. Helmkamp, Elizabeth Helmkamp 2013-1 20212 Calaveras Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  UCR133223  Baccharis brachyphylla George K. Helmkamp 1993-9-18 29- 19 San Bernardino Mojave Desert, Morongo Valley, canyon at W end of Palo Verde Road, l mi west of Juniper Ave, between Big Morongo Canyon and Dry Morongo Canyon 1070 Comment
  UCR106435  Baccharis glutinosa George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2187 Mendocino North Coast, Big River, 0.2 mi east of US-1, south of Mendocino 6 Comment
  SD243073  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2010-10-6 17014 Calaveras Northern Sierra Nevada Mountains Foothills: along CA-26 (Stephen P. Teale Hwy) at the crossing of North Fork Mokelumne River (Rail Road Flat 7.5'Q) 801 Comment
  UCR170428  Baccharis pilularis George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10030 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
  UCR201551  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2008-10-14 14260 Colusa Sacramento Valley, along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  UCR235136  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2011-11-20 18467 El Dorado Northern Sierra Nevada Mountains Foothills, Salmon Falls Road, 1.6 miles south of the bridge of the American River 180 Comment
  UCR241265  Baccharis pilularis George K. Helmkamp, E. A. Helmkamp 2012-10-3 19950 Sacramento Southeast Sacramento Valley, Sacramento State Aquatic Center south of the American River, 0.1 mile east of Hazel Ave. 49 Comment
  UCR161689  Baccharis salicifolia George K. Helmkamp, E. A. Helmkamp 2005-2-24 8962 San Luis Obispo South Coast Ranges, along Huasna Road, c. 5 mi. NE of its junction with Huasna Towship Road (generally east of Arroyo Grande) 244 Comment
  RSA489398  Baileya pauciradiata George K. Helmkamp 1988-2-28 s.n. Imperial just N of Signal Mts, S of Hwy deserticola. 30 Comment
  SEINET2055879  Baileya pleniradiata G. K. Helmkamp, E. A. Helmkamp 2001-9-16 7174 Riverside Willcox Playa, east edge.: Blue Sky Road. O.2 mile nietheast of AZ 186 {southwest of Willcox} 1295 Comment
Read comments
May 3 2014
  SD148199  Barbarea orthoceras G. K. Helmkamp, E. A. Helmkamp 2001-5-30 6734 Santa Clara Gilroy Hot Springs Road, 0.5 mile south of springs at Coyote Creek. 182 Comment
  UCD114275  Barbarea orthoceras G. K. Helmkamp; Elizabeth Helmkamp 2006-4-25 10217 El Dorado Northern Sierra Nevada: E of Sacramento, SW of Placerville. Forni road between US Hwy 50 and Diamond Springs, at Weber Creek. 488 Comment
  UCR250688  Barbarea orthoceras George K. Helmkamp, Mary Alice Barnes 2013-4-18 20349 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
  UCR250689  Barbarea orthoceras George K. Helmkamp, Mary Alice Barnes 2013-4-18 20353 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
  UCSB46688  Barbarea orthoceras Helmkamp, G. 1973-06 Mono Owens River at Big Springs 2286 Comment
  RSA0093482  Bidens frondosa George K. Helmkamp, E. A. Helmkamp 2012-10-8 19999 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
  SD212472  Bidens frondosa G. K. Helmkamp, Elizabeth Helmkamp 2005-9-9 9848 El Dorado Northern Sierra Nevada Foothills; east of Sacramento, Squaw Hollow area at junction of Hank's Exchange Road and Ranch Road, 0.9 mile south of Pleasant Valley Road. 683 Comment
  SEINET3246130  Bidens frondosa G. K. Helmkamp, E. A. Helmkamp 2009-1 15605 El Dorado Sierra Nevada Mountains Foothills: Lake Oaks Mobile Home Park, Diamond Springs; 0.2 mile south of the junction of Patterson Drive and CA-49/Pleasant Valley Road. Comment
  UCR258190  Bidens frondosa George K. Helmkamp, Elizabeth Helmkamp 2012-10-16 20024 Nevada Sierra Nevada Mountains Foothills, Robles Dr., south of the junction of Combie Road and Darkhorse Drive, 2.8 air miles SE (124 deg. ) of Higgins Corner 445 Comment
  UCR91827  Bloomeria crocea var. aurea George K. Helmkamp 1996-5-24 1010 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
  UCR207435  Botrychium multifidum George K. Helmkamp, Amy Barnes 2009-7-8 15156 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
  UCR103311  Bouteloua aristidoides var. aristidoides George K. Helmkamp 1998-4-4 3162 Riverside Sonoran (Colorado) Desert, 7.1 miles north of Hwy I-10 on Eagle Mtn Rd, to the vicinity of the pumping station 305 Comment
  SD224794  Bouteloua barbata var. barbata G. K. Helmkamp 1997-9-30 2488 Inyo East side of White Mnts; alkaline flat running into sagebrush and rocky slopes. 1707 Comment
  UCR200862  Boykinia major George K. Helmkamp, E. A. Helmkamp 2008-9-15 14115 Placer Northern Sierra Nevada Mountains, along Foresthill Road 20 miles northeast of the city of Forest Hill 1707 Comment
  UCR122136  Brachypodium distachyon George K. Helmkamp 2002-4-21 7475 San Luis Obispo Central Coast, Santa Rosa Creek Rd., 6.9 mi east of Cambria 183 Comment
  UCR91687  Brachypodium distachyon George K. Helmkamp 1996-5-24 1013 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
  UCR275317  Brassica geniculata George K. Helmkamp, Elizabeth Helmkamp 2013-8-7 22109 Nevada Sierra Nevada Mountains Foothills, north of Auburn, Robles Drive, just south of the junction of Darkhorse Drive and Combie Rd. 444 Comment
  UCR101137  Brassica tournefortii George K. Helmkamp, E. A. Helmkamp 1998-3-19 2955 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  UCR104854  Brassica tournefortii George K. Helmkamp, E. A. Helmkamp 1998-2-18 2723 Riverside Sonoran (Colorado) Desert, Chuckwalla Valley; 0.3 mi south of Chuckwalla Rd. on Graham Pass Rd. 122 Comment
  UCR240256  Brassica tournefortii George K. Helmkamp 2004-2-11 8272 B San Luis Obispo Central Coast, Nipomo Mesa, Pomeroy Rd, 0.2 mi north of Willow Rd. 130 Comment
  SD234284  Brickellia californica G. K. Helmkamp, E. A. Helmkamp 2007-9-14 12961 Placer Foothills, norhtern Sierra Nevada Mountains: along Mosquito Ridge Road 6 miles east of Foresthill. 609 Comment
  SEINET4691389  Brickellia californica George K. Helmkamp, E. A. Helmkamp 2010-1 17015 Placer Northern Sierra Nevada Mountains Foothills: Old Foresthill Road (between CA-49 and new Foresthill Rd), 1.8 miles northeast of junction with CA-49. 250 Comment
  UCR114246  Brickellia californica George K. Helmkamp 1997-7-29 2246 San Diego South Coast, San Onofre State Beach 30 Comment
  CLARK-A1045-839  Brickellia desertorum George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  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
  UCR184793  Briza minor George K. Helmkamp, E. A. Helmkamp 2007-5-11 11989 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Diamond Springs 524 Comment
  UCR193580  Briza minor George K. Helmkamp, E. A. Helmkamp 2007-9-9 12912 Sacramento Sacramento Valley, along Hwy CA-16, 0.8 mile west of the Amador County line 85 Comment
  UCR217836  Briza minor George K. Helmkamp, Amy Barnes 2010-5-7 15965 Calaveras Sierra Nevada Mountains Foothills, along CA-49, 0.4 mile north of its junction with CA-12, vicinity of San Andreas 233 Comment
  UCR230131  Briza minor George K. Helmkamp, E. A. Helmkamp 2011-5-19 17295 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
  UCR250274  Briza minor George K. Helmkamp, E. A. Helmkamp 2009-3-26 14483 Amador Sierra Nevada Mtns. Foothills, south of Ione, CA-88 between Buena Vista Rd. and South Church St. 125 Comment
  UCR173817  Brodiaea elegans subsp. elegans George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-4 10630 El Dorado Northern Sierra Nevada foothills, Rock Creek Road, about 2.2 miles east of its junction with Calif. Hwy 193 424 Comment
  UCR249600  Brodiaea elegans subsp. elegans George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20829 Placer Northern Sierra Nevada Mountains Foothills, junction of Yankee Jim's Road and Shirttail Canyon Road, NW of Foresthill 463 Comment
  UCR207439  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
  UCR232287  Bromus George K. Helmkamp, E. A. Helmkamp 2010-8-3 16684 Calaveras Northern Sierra Nevada Mountains, along CA-4 at the Arnold Byway, about 0.3 mile northeast of Arnold 1244 Comment
  UCR67017  Bromus briziformis George K. Helmkamp 1990-9-23 D- 11 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UCR207444  Bromus carinatus var. carinatus George K. Helmkamp, Amy Barnes 2009-7-8 15157 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
  UCR237382  Bromus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-13 19166 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  RSA0107419  Bromus diandrus George K. Helmkamp, Amy Barnes 2013-3-28 20259 Yuba Eastern Sacramento Valley: northbound exit road from CA-65, connecting with Forty Mile Road. 30 Comment
  UCR173174  Bromus diandrus George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10129 Placer Northern Sierra Nevada Foothills, NE edge of Sacramento metropolitan area; Sierra College Road and King Ranch Road SSE of Rocklin 122 Comment
  UCR235704  Bromus diandrus George K. Helmkamp, E. A. Helmkamp 2012-4-27 18871 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
  UCR242937  Bromus diandrus George K. Helmkamp, E. A. Helmkamp 2010-4-14 15853 Solano Northern San Joaquin Valley, Tremont Road, 0.8 mile west of Mace Blvd, 3.8 mi. (air) SE of Davis 3 Comment
  SEINET3817934 Image available Bromus laevipes George K. Helmkamp, E. A. Helmkamp 2012-5-5 18910 Placer Northern Sierra Nevada Foothills, Lake Clementine Road, 1.2 miles west of its junction with Foresthill Road, 0.3 air mi SE (123degrees) of Clementine Dam on the American River (Auburn 7.5' Q. 396 Comment
  UCR173822  Bromus madritensis George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-4 10640 El Dorado Northern Sierra Nevada foothills, along Calif. Hwy 193, 0.6 mile west of its junction with Rock Creek Road 485 Comment
  UCR124090  Bromus rubens George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5349 San Bernardino Sonoran (Colorado) Desert, Sacramento Spring. Along Calif. Hwy 95, 1.6 mi north of Interstate-40 396 Comment
  UCR177014  Bromus sterilis George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10407 Nevada Northern Sierra Nevada Foothills, San Juan Ridge area at North Columbia, c. 9.3 mi. east of Calif. Hwy 49 884 Comment
  CLARK-A1045-910  Bromus tectorum George K. Helmkamp 1977-3-24 San Diego Cleveland Mountains roadside; Beauty Mountain 7.5'Q Comment
  CLARK-A1045-830  Buddleja utahensis George K. Helmkamp 1977-5-14 San Bernardino Mesquite Mountains steep limestone slope 1.5 miles east of Winters Pass; ; Clark Mt. 15'Q 1127 Comment
  UCR89830  Caesalpinia virgata George K. Helmkamp 1994-3-10 42- 18 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
  UCR231317  Calandrinia ciliata George K. Helmkamp, E. A. Helmkamp 2011-5-6 17195 Yuba East edge of Sacramento Valley, Camp Far West Road, 0.9 mile west of the junction at Camp Far West Reservoir 65 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
  UCR107313  Calochortus albus George K. Helmkamp, E. A. Helmkamp 1998-5-16 3720 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR257022  Calochortus albus George K. Helmkamp, Amy Barnes 2014-4-23 22782 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
  UCR123395  Calochortus leichtlinii George K. Helmkamp, E. A. Helmkamp 1998-8-13 4431 Mono Eastern Sierra Nevada Mountains, 0.3 mi south of Saddlebag Lake along Saddlebag Lake Rd, above Lee Vining Creek 2988 Comment
  UCR189202  Calochortus leichtlinii George K. Helmkamp 2007-7-7 12508 Alpine Northern Sierra Nevada Mountains, Blue Lake Road, 12.0 miles south of its junction with CA-88 2549 Comment
  UCR173732  Calochortus minimus George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10701 El Dorado Northern Sierra Nevada Mountains, Ice House Road at the turnoff to Loon Lake 1982 Comment
  UCR208587  Calochortus minimus George K. Helmkamp, E. A. Helmkamp 2009-5-11 14652 Placer Sierra Nevada Mountains Foothills, along Forest Hill Road, 2.5 miles northeast of Foresthill 1073 Comment
  CAS-BOT-BC444013  Calochortus monophyllus George K. Helmkamp; Mary Alice Barnes 2013-5-10 20528 El Dorado Northern Sierra Nevada Mtns. Foothills: Wentworth Springs Road, 3.4 miles east of Georgetown. 299 Comment
  UCD139557  Calochortus monophyllus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10337 Amador Northern Sierra Nevada. Grass Valley Creek, 1.2 miles east of Pine Grove along Hwy. CA-88. 762 Comment
  UCR230086  Calochortus monophyllus George K. Helmkamp, E. A. Helmkamp 2011-6-7 17485 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 7.6 rd. miles northeast (via Pine Gulch & Gopher Flat rds) of junction of Sutter Creek Rd. and Pine Gulch Rd. 712 Comment
  UCR157823  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 1998-6-29 4168 Kern Tehachapi Mtns., SW end of city of Tehachapi at corner of Water Canyon Rd.and Highland Rd. 1328 Comment
  UCR170277  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 2005-5-12 9455 Monterey Central Coast Ranges, WNW of Lockwood along Highway G-14; mile-28 on the road 329 Comment
  UCR230973  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 2011-6-7 17475 Amador Northern Sierra Nevada Mountains Foothills, Sutter Creek Road, 3.4 miles west of Volcano 491 Comment
  UCR248666  Calochortus venustus George K. Helmkamp, E. A. Helmkamp 2012-5-31 19095 Calaveras Northern Sierra Nevada Mountains Foothills, CA-26 east of Mokelumne Hill, at the crossing of the South Fork Mokelumne River 614 Comment
  SD234500  Caltha leptosepala G. K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10749 El Dorado Northern Sierra Nevada Mountains: 8 miles east of Ice House Road on the road to Wright's Lake. 2000 Comment
  UC2044598  Calycadenia multiglandulosa George K. Helmkamp with E. A. Helmkamp 2011-6-2 17428 Nevada Northern Sierra Nevada Mountains Foothills Along CA-20, 3.3 miles west of its junction with CA-49 in Grass Valley. (Grass Valley 7.5' Q.) Comment
  UCR241349  Calycadenia multiglandulosa George K. Helmkamp, E. A. Helmkamp 2012-9-20 19871 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
  CAS-BOT-BC526866  Calycadenia oppositifolia George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20722 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy CA-20, 3.5 mi W of CA-49 in Grass Valley 623 Comment
  UCR176461  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2006-7-31 11079 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
  UCR237558  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2012-7-2 19293 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 2.9 miles west of its junction with CA-88 2271 Comment
  UCR242332  Calyptridium monospermum George K. Helmkamp, E. A. Helmkamp 2010-7-28 16657 Placer Northern Sierra Nevada Mountains, Forest Hill Road, 22 miles northeast of the city of Foresthill 2041 Comment
  UCR88209  Calyptridium monospermum George K. Helmkamp 1995-9-23 3- 19 Alpine Sierra Nevada Mtns, west side of Sonora Pass, just beyond the Mono County line 2927 Comment
  UCD126172  Calystegia occidentalis subsp. occidentalis G. K. Helmkamp; E. A. Helmkamp 2006-6-14 10706 Placer Northern Sierra Nevada Mountains: 0.2 mile N of Forest Hill Road on unnamed road to Lake Clementine (general area NE of Auburn on Forest Hill Divide). 487 Comment
  UCR232625  Calystegia occidentalis subsp. occidentalis George K. Helmkamp, E. A. Helmkamp 2010-7-28 16643 Placer Northern Sierra Nevada Mountains, Forest Route 13 (American Hill Road), 1.8 miles south of the junction with Forest Hill Road 1567 Comment
  RSA613880  Camissonia boothii subsp. decorticans George K. Helmkamp, E. A. Helmkamp 1998-4-9 3253 Kern Taft. 14 miles NE of Taft; along Tupman Road just north of its intersection with CA highway 199 (west of the outlet canal) [Hwy 119]. 91 Comment
  UCR101064  Camissonia boothii subsp. decorticans George K. Helmkamp, E. A. Helmkamp 1998-4-9 3253 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
  UCR102527  Camissonia campestris George K. Helmkamp 1997-3-6 1341 Los Angeles Western Mojave Desert, west of Lancaster at 125th St. & Calif. Hwy 138 762 Comment
  UCR122650  Camissonia campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 1998-3-16 2866 A 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
  UCR118642  Camissonia claviformis George K. Helmkamp 1998-4-3 3081 Riverside Sonoran (Colorado) Desert/San Jacinto Mtns., Snow Creek area north of Mt. San Jacinto; at edge of stream south of Snow Creek Rd at a point 1.4 mi. south of Calif. Hwy 111 396 Comment
  SEINET273131  Camissonia claviformis subsp. aurantiaca G. K. Helmkamp, EA Helmkamp 1998-2-26 2751 San Bernardino Mojave Desert; East Cronise Dry lake. 0.2 mi S of I-15 on Basin Rd 332 Comment
  UCR101113  Camissonia claviformis subsp. aurantiaca George K. Helmkamp, E. A. Helmkamp 1998-2-26 2751 San Bernardino Mojave Desert, East Cronese Dry Lake. 0.2 mi south of I-15 on Basin Rd. 332 Comment
  UCR101495  Camissonia claviformis subsp. aurantiaca George K. Helmkamp, E. A. Helmkamp 1998-2-26 2796 San Bernardino Mojave Desert, NW side of Salt Spring Hills about 28 mi north of Baker; between the hills and Calif. Hwy 127 201 Comment
  UCR122945  Camissonia claviformis subsp. aurantiaca George K. Helmkamp, E. A. Helmkamp 2001-3-30 6443 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR14503  Camissonia heterochroma George K. Helmkamp 1974-5-4 s.n. Inyo Owens Valley, Owens River, Pleasant Valley 1372 Comment
  CLARK-A1045-1316  Camissonia ignota George K. Helmkamp 1978-3-25 San Diego Imperial Beach Silver Strand, sandy disturbed area; Imperial Beach 7.5'Q Comment
  CLARK-A1045-74  Camissonia strigulosa George K. Helmkamp 1978-5-20 Riverside San Jacinto Mountains roadside; Kensworthy Forest Station; Idyllwild 15' Q Comment
  SD148105  Camissonia strigulosa G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6522 Kern Tehachapi Mountains; CA-223, 7.2 miles east of Arvin. 366 Comment
  UCR122163  Camissonia strigulosa George K. Helmkamp, E. A. Helmkamp 2000-4-22 5474 San Luis Obispo Central Coast, Los Osos, between the west end of Howard Ave. and Morro Bay sand dunes 15 Comment
  UCR122203  Camissonia strigulosa George K. Helmkamp, E. A. Helmkamp 2002-4-23 7522 Madera Western Sierra Nevada Foothills, along Belleview Rd (Rd 208) 1.2 mi west of Bear Lake Rd (Rd 211), west of Indian Springs 213 Comment
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Jul 7 2020
  SEINET11262382  Campanula prenanthoides George Helmkamp, E. A. Helmkamp 2011-7-30 17934 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 (Caldor 7.5' Q.); 0 1209 Comment
  SEINET9262034  Campanula prenanthoides George K. Helmkamp, Elizabeth Helmkamp 2013-1 20801 Placer Northern Sierra Nevada Mountains Foothills; Yankee Jims Road, 3.6 miles northwest of its junction with Forest Hill Road (Foresthill 7.5 Q) 768 Comment
  UCR229400  Campanula prenanthoides George K. Helmkamp, E. A. Helmkamp 2011-7-30 17934 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
  RSA790650  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2012-5-15 18992 Calaveras At a crossing of Murray Creek along Murray Creek Road. 1.8 mi east of Pope Road in San Andreas. 351 Comment
  SEINET5527563 Image available Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2009-3-5 14336 El Dorado Northern Sierra Nevada Mtns. Foothills; Sand Ridge Road 4.3 miles east of its junction with CA-49 494 Comment
  UCR206868  Capsella bursa-pastoris George K. Helmkamp, E. A. Helmkamp 2009-1-31 14315 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  UCR188240  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2007-4-27 11863 El Dorado Foothills, Northern Sierra Nevada Mountains, Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House 1027 Comment
  UCR208560  Cardamine hirsuta George K. Helmkamp, E. A. Helmkamp 2009-5-4 14591 El Dorado Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 3.6 miles east of Sly Park Rd. and Jenkinson Lake 1226 Comment
  SBBG129008  Cardamine oligosperma G. K. Helmkamp, E. A. Helmkamp 2012-4-21 18811 Nevada junction of Lime Kiln Rd and Amberley Lane, 14.5 mi NNW (345 deg) of Auburn 414 Comment
  CAS-BOT-BC259177  Cardamine pensylvanica George K. Helmkamp; E. A. Helmkamp 2012-2-23 18576 Placer Eastern edge Sacramento Valley: Newcastle, along CA-193 (Newcastle Hwy), 0.1 mile southeast of its junction with Langs Hill Road, west of the junction with I-80, SW of Auburn 279 Comment
  CLARK-A1045-1020  Cardaria pubescens var. elongata George K. Helmkamp 1977-6-11 Kern Weldon roadside ditch beside farmland; ; Weldon 7.5'Q 914 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
  UCR14488  Cardionema ramosissimum George K. Helmkamp 1974-4-28 s.n. San Luis Obispo Central Coast, Baywood Park 30 Comment
  SD227732  Carduus pycnocephalus G. K. Helmkamp, E. A. Helmkamp 1999-5-22 4903 San Luis Obispo Los Osos: N of the corner of Buckskin & Martingale streets. 60 Comment
  UCR130720  Carduus pycnocephalus George K. Helmkamp, E. A. Helmkamp 1999-5-22 4903 San Luis Obispo Central Coast, Los Osos; north of the corner of Buckskin Dr. & Martingale Ave. 61 Comment
  UCD140990  Carex G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10881 El Dorado Northern Sierra Nevada Mountains. Wright's Lake Road, 6.1 miles north of Hwy. US-50. At junction with the road from Ice House Resevoir. 2030 Comment
  UCR235571  Carex George K. Helmkamp, E. A. Helmkamp 2012-5-3 18901 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
  UCR249557  Carex George K. Helmkamp, E. A. Helmkamp 2007-6-20 12396 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail just before its junction with Hwy CA-88 2265 Comment
  SEINET3896968  Carex abrupta George K. Helmkamp, E. A. Helmkamp 2008-6-23 13742 Amador Northern Sierra Nevada Mountains: Dufrene Road, 1.5 miles south of its junction with CA-88 jct. between Mormon Emigrant Trail and Bear Valley Reservoir Road ( Bear River Reservoir 7.5'Q).; 0 2021 Comment
  UCR190551  Carex athrostachya George K. Helmkamp 2007-6-29 12436 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  UCR246640  Carex deweyana subsp. leptopoda George K. Helmkamp, E. A. Helmkamp 2012-6-6 19149 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 5.8 miles south of its junction with CA-88, 6.2 mi. SW (246 deg. ) of Bear River Reservoir dam 1465 Comment
  UCR197801  Carex hassei George K. Helmkamp, E. A. Helmkamp 2008-6-23 13726 Amador Northern Sierra Nevada Mountains, Dufrene Road, 1.1 miles south of its junction with CA-88 (jct. is between Mormon Emigrant Trail and Bear River Reservoir Road), c. 2 miles (air) north of the west end of Lower Bear River Reservoir 2055 Comment
  SD260859  Carex hoodii George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18080 Alpine Northern Sierra Nevada Mountains: south side of Bear Valley Village, along CA Hwy 4 . 2168 Comment
  UCR122345  Carex illota George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5896 Mono Sierra Nevada Mountains., West side of Lake Mary, southwest of Mammoth Lakes 2652 Comment
  UCR174201  Carex illota George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10586 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road just north of Hwy US-50 1665 Comment
  UCR114347  Carex integra George K. Helmkamp, E. A. Helmkamp 1997-9-8 2269 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR192508  Carex integra George K. Helmkamp, E. A. Helmkamp 2007-5-31 12225 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
  UCR237286  Carex mariposana George K. Helmkamp, E. A. Helmkamp 2012-7-2 19314 Amador Northern Sierra Nevada Mountains, Bear River Road, 3.0 miles east of the Lower Bear River Reservoir dam 1816 Comment
  UCR189156  Carex multicaulis George K. Helmkamp, E. A. Helmkamp 2007-7-27 12594 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 3.9 miles north of its junction with CA-20; in the vicinity of Fuller Lake 1668 Comment
  UCR206070  Carex multicostata George K. Helmkamp, E. A. Helmkamp 2008-8-1 13927 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.3 miles north of its junction with CA-50 2043 Comment
  UCR248392  Carex multicostata George K. Helmkamp, Elizabeth Helmkamp 2013-7-10 21031 Amador Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the rest stop 0.4 mile west of CA-88 (Carson Pass Hwy), near abandoned Iron Mountain ski area 2250 Comment
  UCR240966  Carex nebrascensis George K. Helmkamp, E. A. Helmkamp 2012-9-25 19918 Placer Northern Sierra Nevada Mountains, Laing Road, parallel to I-80; 0.2 mile east of its junction with Emigrant Gap Road 1611 Comment
  UCR252991  Carex nebrascensis George K. Helmkamp, Amy Barnes 2013-9-23 22329 Alpine Northern Sierra Nevada Mountains, northern edge of Mosquito Lake along CA-4/Ebbetts Pass road 2454 Comment
  UCR40778  Carex pellita George K. Helmkamp 1985-8-20 885- 22 Mono Owens Valley, along the Owens River, at Big Springs Campground, 7 air miles NE of Mammoth Lakes, above Arcularius Ranch 2195 Comment
  UCR15425  Carex rostrata George K. Helmkamp 1977-9-1 s.n. El Dorado Sierra Nevada Mtns., Grass Lake, west of Luther Pass 2348 Comment
  UCR15424  Carex simulata George K. Helmkamp 1977-8-7 s.n. Tuolumne Sierra Nevada Mtns, Yosemite National Park. Porcupine Flats Campground 2591 Comment
  UCD140973  Carex vesicaria G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12793 El Dorado Northern Sierra Nevada Mountains: Ice House Road at the junction to the lower campground and boat ramp of Loon Lake. 1976 Comment
  UCR121541  Castilleja affinis subsp. affinis George K. Helmkamp, E. A. Helmkamp 1999-6-28 4996 San Mateo Pescadero Creek Watershed, Bean Hollow Road 0.3 mi south of Pescadero Road (SW of Pescadero). Slopes above Butano Creek 61 Comment
  UCR123910  Castilleja applegatei subsp. martini George K. Helmkamp, E. A. Helmkamp 2001-7-7 6921 Tehama Sierra Nevada Mountains, Calif. Hwy 36, 2.6 mi west of Mineral, about 33 mi west of Chester, Lake Almanor 1418 Comment
  UCR121760  Castilleja applegatei subsp. pallida George K. Helmkamp, E. A. Helmkamp 1998-8-11 4320 Mono White Mountains, White Mountain Road west of the turnoff to Patriarch Bristlecone Pine Grove 3445 Comment
  UC2045175  Castilleja applegatei subsp. pinetorum George K. Helmkamp with Mary Alice Barnes 2013-4-18 20354 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. Colfax 7.5' Q. Comment
  UCD122250  Castilleja applegatei subsp. pinetorum G. K. Helmkamp; E. A. Helmkamp 2006-7-7 10848 El Dorado Northern Sierra Nevada Mtns.: Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz. 2049 Comment
  UCR198496  Castilleja applegatei subsp. pinetorum George K. Helmkamp, E. A. Helmkamp 2008-5-4 13394 Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  RSA0047081  Castilleja campestris subsp. campestris George K. Helmkamp, E. A. Helmkamp 2008-8-1 13941 El Dorado Wright's Lake Road at Lyons Creek, 4.0 miles north of CA-50. 2043 Comment
  UCR161824  Castilleja exserta subsp. exserta George K. Helmkamp, E. A. Helmkamp 2005-3-13 9117 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon, 2.0 mi. south of Calif. Highway 166 402 Comment
  UCR102522  Castilleja exserta subsp. venusta George K. Helmkamp, E. A. Helmkamp 1997-3-7 1370 Kern SE of Maricopa along Western Minerals Rd near Bitter Creek 427 Comment
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Mar 17 2021
  UCR130388  Castilleja exserta subsp. venusta George K. Helmkamp, E. A. Helmkamp 1998-5-21 4035 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  UCR253124  Castilleja foliolosa George K. Helmkamp, Amy Barnes 2014-4-23 22822 Placer Sierra Nevada Mountains Foothills, Foresthill Road, 0.6 mile northeast of Grizzly Bear House, c. 2 miles NE of Lake Clementine Rd, 0.57 mi. SW of Upper Lake Clementine Rd 526 Comment
  UCR61757  Castilleja foliolosa George K. Helmkamp 1990-4-1 s.n. San Luis Obispo West Cuesta Ridge, c. 3 mi west of US Hwy 101 671 Comment
  UCR130600  Castilleja latifolia George K. Helmkamp, E. A. Helmkamp 1999-5-21 4844 Monterey Santa Lucia Mtns./Central Coast, Willow Creek, north of Gorda beside Calif. Hwy 1 30 Comment
  SEINET13276717 Image available Castilleja miniata subsp. miniata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-1 19426 Sierra Northern Sierra Nevada Mountains: along Hwy CA-89, c. 8 miles north of the Nevada County line (Sierraville 7.5' Q.) 1823 Comment
  UCR196816  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2008-7-16 13813 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR233677  Castilleja miniata subsp. miniata George K. Helmkamp, E. A. Helmkamp 2010-8-26 16860 Nevada Northern Sierra Nevada Mountains, Donner Pass Road, 0.8 mile west of its junction with Hwy. I-80, 0.65 mi. NE (62 deg. ) of Kingvale 1921 Comment
  UCR13912  Castilleja pilosa George K. Helmkamp 1973-6-14 s.n. Mono Owens Valley, Owens River at Benton Crossing, just north of Crowley Lake 2134 Comment
  UCR13914  Castilleja pilosa George K. Helmkamp 1973-6-13 s.n. Inyo Owens Valley, Owens River near Pleasant Valley 1372 Comment
  UCR247253  Castilleja pruinosa George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22181 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.1 mile east of its junction with CA-4, Monitor Creek 1747 Comment
  UCD123060  Castilleja tenuis G. K. Helmkamp; E. A. Helmkamp 2006-7-10 10902 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 6.1 miles north of Hwy US-50 at the junction with the road from Ice House Reservoir. 2030 Comment
  UCR218255  Castilleja tenuis George K. Helmkamp, E. A. Helmkamp 2010-7-23 16598 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
  UCR242787  Castilleja tenuis George K. Helmkamp, E. A. Helmkamp 2010-9-1 16918 Amador Northern Sierra Nevada Mountains, Dufrene Road 0.7 mile east of its junction with CA-88, north of Lower Bear River Reservoir 2044 Comment
  UCR250154  Ceanothus cordulatus George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20923 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, north side of its junction with Mormon Emigrant Trail 2188 Comment
  SBBG129049  Ceanothus integerrimus G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20874 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  UCR258533  Ceanothus prostratus George K. Helmkamp, Mary Alice Barnes 2013-4-30 20421 El Dorado Northern Sierra Nevada Mountains, Capps Crossing Road, 0.1 mile south of its junction with Mormon Emigrant Trail 1261 Comment
  UCR87510  Ceanothus prostratus George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 16.1 miles NW of Canby along Calif. Hwy 139 1280 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
  UCR123465  Ceanothus velutinus subsp. velutinus George K. Helmkamp, E. A. Helmkamp 1998-8-13 4437 Mono Eastern Sierra Nevada Mountains, Inyo Craters, about 3.6 air miles NW of Mammoth Lakes 2591 Comment
  UCR202560  Centaurea cyanus George K. Helmkamp, E. A. Helmkamp 2008-9-22 14155 Alpine Northern Sierra Nevada Mountains, along CA-89. 0.1 mile north of Markleeville 1686 Comment
  SD248325  Centaurea solstitialis George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22134 Amador Sierra Nevada Mountains Foothills: City of Sutter Creek at the junction of Hanford St. and Spanish St. 384 Comment
  SEINET4560835  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2010-1 17023 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
  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
  UCR206392  Centaurea solstitialis George K. Helmkamp, E. A. Helmkamp 2009-5-20 14758 Colusa Inner North Coast Ranges, along CA-16, 1.8 miles north of the Yolo County line 271 Comment
  UCR253592  Cephalanthus occidentalis var. californicus George K. Helmkamp, Elizabeth Helmkamp 2012-10-30 20111 Sutter Sacramento Valley, Kirkville Rd., west of CA-99 on Sacramento Ave. to the east side of the Sutter Causeway 17 Comment
  UCR217934  Cerastium glomeratum George K. Helmkamp, Laurel Bezdecheck 2010-5-28 16105 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
  UCR218192  Cerastium glomeratum George K. Helmkamp, E. A. Helmkamp 2010-5-31 16156 Amador Sierra Nevada Mountains Foothills, Church Street, becoming Sutter Creek-Volcano Road, 0.2 mile east of the village of Sutter Creek 402 Comment
  UCR118953  Cerastium tomentosum George K. Helmkamp 2000-7-18 5848 Mono Eastern Sierra Nevada Mountains, city of Mammoth Lakes 2409 Comment
  UCR188874  Cercis occidentalis George K. Helmkamp, E. A. Helmkamp 2007-3-31 11725 Nevada Foothills, Northern Sierra Nevada Mountains, just south of the crossing of CA-49 over the South Yuba River 390 Comment
  UCD130267  Chaenactis douglasii G. K. Helmkamp; E. A. Helmpkamp 2006-9-12 11374 El Dorado Northern Sierra Nevada Mountains: Along Hwy CA-89, 1.2 miles west of the Alpine County line. General area of Luther Pass and Grass Lake. 2362 Comment
  RSA0012020  Chaenactis douglasii var. douglasii George K. Helmkamp, E. A. Helmkamp 2010-8-26 16829 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
  UCR189049  Chaenactis douglasii var. douglasii George K. Helmkamp 2007-7-7 12511 Alpine Northern Sierra Nevada Mountains, Blue Lake Road, 12.0 miles south of its junction with CA-88 2549 Comment
  UCR88333  Chaenactis douglasii var. douglasii George K. Helmkamp 1995-9-21 95-1- 06 Mono Sierra Nevada Mtns., south edge of Lake Mary, south of Lake Mary, Mammoth Lakes 2805 Comment
  UCR104790  Chaenactis fremontii George K. Helmkamp 1998-4-4 3123 San Bernardino Mojave Desert, S edge of Cadiz Dry Lake, 13.1 mi. north of mile-marker 76 on Calif. hwy 62 (Twentynine Palms Hwy), east of Twentynine Palms 183 Comment
  UCR158571  Chaenactis glabriuscula var. lanosa George K. Helmkamp, E. A. Helmkamp 2005-4-22 9399 San Luis Obispo Inner South Coast Ranges, Carrizo Highway at Mile-32, Calif. Hwy 58, east of Santa Margarita, beside Windmill Creek 509 Comment
  SBBG129052  Chamaebatia foliolosa G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20872 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  SEINET2442019  Chamaebatia foliolosa George K. Helmkamp, E. A. Helmkamp 2010-5-15 16046 El Dorado Sierra Nevada Mountains Foothils: String Canyon Road, 1.4 miles northeast of its junction with Consumnes Mine Road (Sly Park 7.5').; 0 1109 Comment
  UCR253217  Chamaebatia foliolosa George K. Helmkamp 2014-4-27 22827 El Dorado Sierra Nevada Mountains, Capps Crossing Road, 0.9 mile west of the bridge over Camp Creek 1552 Comment
  RSA615338  Chamaesyce polycarpa var. polycarpa George K. Helmkamp, E. A. Helmkamp 1998-2-18 2696 Riverside Midland Rd., 3.8 mi. SE of Midland, Little Maria Mtns. Sandy wash with Olneya tesota and Mexican paloverde, adjacent to creosote bush scrub. Comment
  UCR248541  Chamaesyce serpyllifolia George K. Helmkamp, Elizabeth Helmkamp 2013-9-13 22287 Amador Northern Sierra Nevada Mountains Foothills, Volcano Road, 11.4 miles northeast of CA-49 in Sutter Creek, c. 0.4 mi SW of Volcano 608 Comment
  UCD103661  Chamerion angustifolium subsp. circumvagum G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11095 El Dorado Northern Sierra Nevada Mountains. 0.3 mile W of the junction of Wright's Lake Road (Forestry Route 4) and the road form Ice House Reservoir. 2037 Comment
  UCR196924  Chenopodium George K. Helmkamp, E. A. Helmkamp 2008-7-22 13875 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
  UCR201556  Chenopodium berlandieri George K. Helmkamp, E. A. Helmkamp 2008-10-14 14272 Colusa Sacramento Valley, along CA-20, 2 miles west of Meridian 14 Comment
  UCR261625  Chenopodium berlandieri George K. Helmkamp, Amy Barnes 2014-9-16 23098 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
  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
  UCR59979  Chenopodium botrys George K. Helmkamp 1988-9-8 s.n. Mono Clearwater Creek Road (to Bodie), 2.2 mi. east of Hwy 395 2256 Comment
  UCR103346  Chenopodium fremontii George K. Helmkamp 1993-9-12 22- 12 San Bernardino San Bernardino Mtns, Burns Canyon, in the vicinity of Burns Spring 1524 Comment
  RSA518507  Chenopodium incanum George K. Helmkamp 1985-5-28 s.n. San Bernardino South of Morongo Valley. First STring crossing about 1 1/2 miles downstream from the Kiosk. 716 Comment
  UCD97854  Chenopodium missouriense G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13065 Butte Northern Sacramento Valley. East Gridley Road at the west edge of the Feather River bridge. 27 Comment
  UCR103605  Chenopodium murale George K. Helmkamp 1997-2-1 1297 Imperial Sonoran (Colorado) Desert, Imperial Valley, SW of Niland along Sinclair Rd and just east of Hatfield Rd. -55 Comment
  UCD130409  Chondrilla juncea G. K. Helmkamp; E. A. Helmkamp 2006-8-11 11206 Placer Northern Sierra Nevada Mountain. Along connecting road joining Forest Hill Road, with the CA-49 crossing of American River. 396 Comment
  UCR188559  Chondrilla juncea George K. Helmkamp, E. A. Helmkamp 2007-9-26 13021 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 2.3 miles east of Jenkinson Lake 1226 Comment
  CLARK-A1045-988  Chorizanthe brevicornu George K. Helmkamp 1977-4-16 Kern Mojave 3 miles east of Mojave; Mojave 7.5'Q Comment
  UCR122948  Chorizanthe brevicornu George K. Helmkamp, E. A. Helmkamp 2001-3-30 6457 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  SD225062  Chorizanthe brevicornu var. brevicornu G. K. Helmkamp 1998-2-5 2639 Riverside Palm Springs, 1.1 mi. W of CA Hwy 111 on Tramway Rd. 334 Comment
  UCR142586  Chorizanthe californica George K. Helmkamp, E. A. Helmkamp 2000-6-15 5673 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR15525  Chorizanthe watsonii George K. Helmkamp 1978-5-28 s.n. Mono Lower Rock Creek 1677 Comment
  UCR123995  Chrysanthemum leucanthemum George K. Helmkamp, E. A. Helmkamp 2001-7-6 6852 Plumas Sierra Nevada Mountains, Calif. Hwy 89, ESE of Lake Almanor at Crescent Mills 976 Comment
  UCR216336  Chrysanthemum leucanthemum George K. Helmkamp 2004-3-23 08396 San Luis Obispo Central Coast, ENE of Nipomo; 1.5 miles SW of Rancho Rd along Dana Foothill Rd. 171 Comment
  UCD110129  Chrysolepis sempervirens G. K. Helmkamp; E. A. Helmkamp 2006-8-14 11264 El Dorado Northern Sierra Nevada Mtns: Sayles Flat at the junction of Mount Ralston Trail and US-50, ca. 0.9 mile south of Twin Bridges. 1960 Comment
  UCD110130  Chrysolepis sempervirens G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12794 El Dorado Northern Sierra Nevada Mtns: Ice House Road at the junction to the lower campground and boat ramp of Loon Lake. 1976 Comment
  RSA0053699  Chrysothamnus nauseosus subsp. albicaulis G. K. Helmkamp, E. A. Helmkamp 2012-9-25 19928 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
  UCR178752  Chrysothamnus nauseosus subsp. albicaulis George K. Helmkamp, E. A. Helmkamp 2006-8-30 11320 Amador Northern Sierra Nevada Mountains, along Calif. Hwy 88, 4.5 miles west of the south shore of Silver Lake, vicinity of Shot Rock Picnic area 2322 Comment
  UCR58451  Chrysothamnus teretifolius George K. Helmkamp 1989-10-1 s.n. San Bernardino Southern Mojave Desert, Coyote Hole Spring, 1.1 mi south of Hwy 62 at town of Joshua Tree 900 Comment
  SD143804  Chylismia claviformis subsp. yumae G. K. Helmkamp, E. Helmkamp 1998-1-24 2581 Imperial Between Highway I-8 and the All American Canal across from the Brock Research Center, ca. 3.0 miles east of the junction of Highway CA-98 with Highway I-8. 46 Comment
  SD143805  Chylismia claviformis subsp. yumae G. K. Helmkamp, E. Helmkamp 1998-1-24 2570 Imperial Between Highway I-8 and the All American Canal across from the Brock Research Center, ca. 3.0 miles east of the junction of Highway CA-98 with Highway I-8. 46 Comment
  UCR258412  Cichorium intybus George K. Helmkamp, Amy Barnes 2014-8-27 23040 Alpine Northern Sierra Nevada Mountains, Woodfords, at the junction of CA-88 and CA-89 1723 Comment
  CAS-BOT-BC444033  Cinnamomum camphora George K. Helmkamp; E. A. Helmkamp 2013-11-29 22499 El Dorado Foothills Sierra Nevada Mountains: 1.1 mi. NW (320 deg. ) of Coloma, Little Rd. along the NE side of South Fork American River; 0.2 mile north of CA-49. 64 Comment
  UCR230704  Cirsium vulgare George K. Helmkamp, E. A. Helmkamp 2010-10-1 16995 Amador Northern Sierra Nevada Mountains Foothills, Shake Ridge Road, 1.1 miles southwest of its junction with Hale Road, 2.5 mi. NW (285 deg. ) of Volcano 692 Comment
  RSA779392  Cistanthe monosperma George K. Helmkamp, E. A. Helmkamp 2009-6-29 15080 El Dorado Ice House Road, 8.2 miles north of its junction with CA-50, c. 10.5 air miles NE (73 deg ) of Pollock Pines 1646 Comment
  UCR102542  Clarkia amoena subsp. huntiana George K. Helmkamp, E. A. Helmkamp 1997-6-25 2101 Mendocino State Hwy 128, about 5 mi. NW of Cloverdale 427 Comment
  UCR121480  Clarkia amoena subsp. huntiana George K. Helmkamp, E. A. Helmkamp 2000-6-18 5700 Sonoma Outer North Coast Ranges, along Calif. Hwy 128, 0.5 mi south of Mendocino Co. line 381 Comment
  SBBG120611  Clarkia biloba G. K. Helmkamp with E. A. Helmkamp 2006-6-14 10708 Placer 0.2 mi N of Forest Hill Rd on unnamed rd to Lake Clementine (general area NE of Auburn on Forest Hill Divide) 488 Comment
  SEINET11237917 Image available Clarkia biloba subsp. biloba George K. Helmkamp, E. A. Helmkamp 2009-6-2 14874 El Dorado Sierra Nevada Mountains foothills, along Mother Lode Road, 0.1 mile west of its junction with CA-49 (west end of El Dorado) 512 Comment
  UCR230990  Clarkia biloba subsp. biloba George K. Helmkamp, E. A. Helmkamp 2011-7-2 17626 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
  UCR140982  Clarkia cylindrica subsp. cylindrica George K. Helmkamp 2004-4-23 8515 Santa Barbara San Rafael Mountains, Figueroa Mountain Rd, 12.9 mi from Hwy-Calif. Hwy 154 at San Olivos jct. 1159 Comment
  UCR159843  Clarkia cylindrica subsp. cylindrica George K. Helmkamp, E. A. Helmkamp 2005-6-12 9623 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR122639  Clarkia purpurea George K. Helmkamp, E. A. Helmkamp 1998-5-19 3880 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR173272  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10436 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along Forest Hill Road, 1.8 mi. NE of its junction with Calif. Hwy 49 at the middle fork of the American River 370 Comment
  UCR194923  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2007-5-27 12153 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
  UCR217390  Clarkia purpurea subsp. quadrivulnera George K. Helmkamp, E. A. Helmkamp 2010-6-14 16280 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 4.5 miles from its junction with Perry Creek Road, 3.5 air mi. ESE (96 deg. ) of Fair Play 1059 Comment
  UCR230640  Clarkia rhomboidea George K. Helmkamp, E. A. Helmkamp 2011-7-19 17818 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  SD148104  Clarkia rubicunda G. K. Helmkamp, E. A. Helmkamp 2001-5-30 Santa Clara Santa Clara Valley, Gilroy Hot Springs Rd., 0.5 mile South of springs at Coyote Crk. 182 Comment
  UCR157793  Clarkia speciosa George K. Helmkamp, E. A. Helmkamp 1998-6-29 4142 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR158891  Clarkia speciosa subsp. speciosa George K. Helmkamp, E. A. Helmkamp 2005-5-12 9437 Monterey Central Coast Ranges, 8 mi west of US-101 on Calif. Highway G18 in Hames Valley 341 Comment
  UCR109061  Clarkia unguiculata George K. Helmkamp, E. A. Helmkamp 1998-6-30 4203 San Luis Obispo South Coast Range, Alamo Creek Rd, 0.9 mile north of Calif. Hwy 166, near Twitchell Reservoir 320 Comment
  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
  UCR256676  Clarkia unguiculata George K. Helmkamp, Amy Barnes 2014-5-8 22854 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 0.2 mile east of old CA-49 in town of Sutter Creek 375 Comment
  RSA750961  Clarkia xantiana George K. Helmkamp, E. A. Helmkamp 1998-6-29 4138 Kern 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR170987  Claytonia parviflora subsp. parviflora George K. Helmkamp, E. A. Helmkamp 2006-3-19 10086 Amador Northern Sierra Nevada Foothills, Along Calif. Highway 49 just south of Plymouth 323 Comment
  UCR254592  Claytonia parviflora subsp. parviflora George K. Helmkamp 2014-3-11 22549 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
  UCR102145  Claytonia perfoliata George K. Helmkamp, E. A. Helmkamp 1998-5-14 3680 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  SEINET13203121 Image available Claytonia perfoliata subsp. mexicana George K. Helmkamp 2014-1 22754 Nevada Sierra Nevada Mountains Foothills: 8 miles west of Grass Valley, Penn Valley Drive, 0.2 mile southeast of its junction with CA-120 (Rough & Ready 7.5' Q.) 437 Comment
  UCR258542  Claytonia rubra subsp. rubra George K. Helmkamp, Mary Alice Barnes 2013-4-30 20427 El Dorado Northern Sierra Nevada Mountains, Capps Crossing Road, 0.1 mile south of its junction with Mormon Emigrant Trail 1261 Comment
  UCR161820  Clematis lasiantha George K. Helmkamp, E. A. Helmkamp 2005-3-13 9122 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon, 3.1 mi south of Calif. Highway 166 396 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-A1045-31  Coldenia plicata George K. Helmkamp 1977-4-24 Inyo 15 miles north of Trona; Creosote Bush scrub Comment
  CLARK-A1045-860  Coleogyne ramosissima George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  UCR188174  Collinsia George K. Helmkamp, E. A. Helmkamp 2007-4-30 11893 El Dorado Foothills, Northern Sierra Nevada Mountains, hiking trail leaving from CA-49, 3.4 miles northwest of Placerville 511 Comment
  RSA710034  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2002-4-22 7426 San Benito San Andreas rift zone: Rabbit Valley. Along CA-25, 23.7 mi N of CA-198. 549 Comment
  SD227903  Collinsia heterophylla G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3610 Fresno Coast Range: Warthan Creek Canyon, near Curry Mtn., ca 6 - 7 miles (airline) SW of Coalinga, along CA Hwy 198, 20.8 mi. W of Interstate 5. 395 Comment
  SEINET3860455  Collinsia heterophylla George 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 mi. east of San Andreas.; 0 512 Comment
  UCR207897  Collinsia heterophylla George K. Helmkamp, E. A. Helmkamp 2009-5-14 14688 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCD123538  Collinsia heterophylla var. heterophylla G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10366 Amador Northern Sierra Nevada Foothills: near Enterprise, ca. 0.4 mile east of Ca Hwy 88 on an unnamed dirt road (probably Bell Road). 305 Comment
  UCD123539  Collinsia heterophylla var. heterophylla G. K. Helmkamp 2006-5-6 10314 Amador Northern Sierra Nevada foothills: middle of the city Jackson, 0.1 mile north of the junction of CA-49 and CA-88. 377 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
  UCR185219  Collinsia sparsiflora George K. Helmkamp, E. A. Helmkamp 2007-4-23 11783 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
  SD241188  Collinsia tinctoria George K. Helmkamp, E. A. Helmkamp 2011-7-9 17687 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 10.8 miles southeast of its junction with Foresthill Road (Michigan Bluff 7.5'Q) 502 Comment
  UCR218248  Collinsia tinctoria George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16434 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.9 miles southeast of its junction with Canyon Way in Colfax 415 Comment
  RSA795624  Collomia grandiflora George K. Helmkamp, E. A. Helmkamp 2011-7-12 17732 Calaveras Winton Road (Forest Route 7N03), 14.4 miles east of its junction with CA-26 in West Point. 1590 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
  SEINET4691692  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-1 17366 El Dorado Northern Sierra Nevada Mountains Foothills: Mesquite Road, 7.5 miles south of its junction with Wentworth Springs Road. 1073 Comment
  UCR191100  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2007-6-8 12289 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 2.0 miles south of Mormon Emigrant Trail 1189 Comment
  UCR229426  Collomia heterophylla George K. Helmkamp, E. A. Helmkamp 2011-7-26 17875 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
  UCR87839  Collomia tinctoria George K. Helmkamp, E. A. Helmkamp 1995-6-23 95- 09 -03 Alpine Sierra Nevada Mtns, Calif. Hwy 89, beside alpine Heenan Lake, east of Monitor Pass 2165 Comment
  UCR249542  Conium maculatum George K. Helmkamp 2013-3-1 20147 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  RSA0115713  Convolvulus arvensis George K. Helmkamp, Mary Alice Barnes 2013-5-8 20519 Yolo Southern Sacramento Valley: Yolo Bypass Wildfire Area, 0.9 mile southeast of the junction of Chiles Road and I-80, between Sacramento and Davis. 13 Comment
  UCR178766  Convolvulus arvensis George K. Helmkamp, E. A. Helmkamp 2006-9-12 11400 Alpine Northern Sierra Nevada Mountains, west end of Caples Lake at a dam; alongside CA Hwy 88 2335 Comment
  UCR170425  Conyza bonariensis George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10020 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, c. 3 air mi NNW of Placerville]; South Fork of American River on the west side of Calif. Highway 193 291 Comment
  UCR179349  Conyza canadensis George K. Helmkamp, E. A. Helmkamp 2006-9-20 11421 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Ice House Road [at Riverton] and US-50 east of Pacific 1000 Comment
  UCR253150  Conyza canadensis George K. Helmkamp, Amy Barnes 2013-9-23 22337 Calaveras Northern Sierra Nevada Mountains, Forest Route 6N45 at the junction with CA-4, between Ganns and Cottage Springs 2021 Comment
  RSA567982B  Cordylanthus rigidus subsp. setiger George K. Helmkamp 1993-9-12 23 -13 San Bernardino Along the edge of Burns Canyon. 1372 Comment
  RSA0084757  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, E. A. Helmkamp 2005-9-12 9852 El Dorado Northern Sierra Nevada Foothills: E of Sacramento; Sly Park Road (County Highway E-16), ca. 1 mi SW of Jenkinson Lake. 1067 Comment
  UCR170360  Cordylanthus tenuis subsp. tenuis George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9852 El Dorado Northern Sierra Nevada Foothills, E of Sacramento; Sly Park Road (County Highway E-16), c. 1 mi SW of Jenkinson Lake 1067 Comment
  SEINET2042032 Image available Coreopsis bigelovii George Helmkamp, E. A. Helmkamp 2001-4-26 6472 Kern Tehachapi Mountains: Oak Crk Rd., 8.9 mi W of Mojave. 1189 Comment
  UCR173976  Cornus nuttallii George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10532 El Dorado Northern Sierra Nevada Mountains, Along Wentworth Springs Road, 11 mi. east of Stumpy Meadows Lake 1777 Comment
  UCR197631  Cornus nuttallii George K. Helmkamp, E. A. Helmkamp 2008-6-9 13645 El Dorado Northern Sierra Nevada Mountains, Cat Creek Road, 0.1 mile north of its junction with CA-88, jct. is 4.2 miles east of Cook's Station 1662 Comment
  UCR134412  Cornus sericea subsp. occidentalis George K. Helmkamp, E. A. Helmkamp 2001-4-29 6572 San Luis Obispo South Coast Range, Irish Hills, Clark Valley Road, 2.8 miles south of Los Osos Valley Road, east of Los Osos 91 Comment
  UCR200867  Cornus sericea subsp. sericea George K. Helmkamp, E. A. Helmkamp 2008-9-15 14106 Placer Northern Sierra Navada Mountains, along Foresthill Road 26 miles northeast of the city of Forest Hill 1954 Comment
  UCR201516  Cornus sericea subsp. sericea George K. Helmkamp, E. A. Helmkamp 2008-8-20 14020 Placer Northern Sierra Nevada Mountains, Rainbow exit south from US-80 and east of Big Bend, adjacent to the South Yuba River 1811 Comment
  UCR104036  Cotula australis George K. Helmkamp, E. A. Helmkamp 1997-3-5 1328 Riverside 2.8 mi SE of Gilman Hot Springs 518 Comment
  UCR242776  Cotula australis George K. Helmkamp, E. A. Helmkamp 2010-4-14 15864 Solano Northern San Joaquin Valley, Pitt School Road, 3.8 miles south of its junction with I-80 and south of Dixon 21 Comment
  UCR104839  Crepis capillaris George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-25 2136 Mendocino North Coast Range, Anderson Valley, Calif. Hwy 128, NW of Boonville 91 Comment
  UCR118285  Croton californicus George K. Helmkamp, E. A. Helmkamp 1998-4-19 3349 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  UCR161814  Croton californicus George K. Helmkamp, E. A. Helmkamp 2005-2-18 8939 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
  CDA25743  Croton setiger G. K. Helmkamp, E. A. Helmkamp 2007-10-13 13089 San Joaquin Northern San Joaquin Valley; Along Highway CA-88, 1.0 mile southwest of Clements at Disch Road. Comment
  UCR253631  Croton setiger George K. Helmkamp, Elizabeth Helmkamp 2012-11-12 20127 El Dorado East end of Sacramento Valley, El Dorado Hills; 100 yards east of Golden Foothill Parkway on Cypress Point Ct. (cul-de-sac), 0.7 mile south of Windfield Parkway 159 Comment
  UCR219014  Crucianella angustifolia George K. Helmkamp, E. A. Helmkamp 2010-6-23 16356 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
  CLARK-A1045-572  Crunocallis chamissoi George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains wet, grassy area; ; Keller Peak 7.5'Q Comment
  UCR94637  Crypsis schoenoides George K. Helmkamp 1996-9-11 1158 San Diego Peninsular Range, c. 5 miles south of Calif. Hwy 76 on Couser Canyon Road onto Lilac Rd. to Wills Avocado Ranch 335 Comment
  CAS-BOT-BC334216  Cryptantha affinis George K. Helmkamp; E. A. Helmkamp 2011-8-6 18015 Amador Northern Sierra Nevada Mountains: along dirt road 0.3 mile E of Bear River Reservoir Road, from a point 0.7 miles S of CA-88 1986 Comment
  UCR197351  Cryptantha affinis George K. Helmkamp, E. A. Helmkamp 2008-6-23 13720 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
  UCR67021  Cryptantha affinis George K. Helmkamp 1990-8-2 s.n. Mono Sierra Nevada Mtns, between Mammoth and Lake Mary 2591 Comment
  UCR57543  Cryptantha ambigua George K. Helmkamp 1989-8-1 s.n. Mono Sierra Nevada Mtns., West Walker River, at Hwy 395, 4 mi. south of Walker 1890 Comment
  CLARK-A1045-1215  Cryptantha angustifolia George K. Helmkamp 1977-1-22 Imperial Salton Sea at Desert Shores, along State Highway 86 near Salton Sea; camp area; Oasis 7.5'Q Comment
  SD144007  Cryptantha angustifolia G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2884 Imperial 4.7 mi. N of Winterhaven on Picacho Rd and 1 mi. NW of the All-American Canal. 75 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
  UCR123981  Cryptantha angustifolia George K. Helmkamp, E. A. Helmkamp 2001-3-30 6388 San Bernardino Mojave Desert, CA Hwy 62, 16.2 mi east of Utah Trail (Twentynine Palms) near Dale Lake 366 Comment
  SBBG119609  Cryptantha barbigera G. K. Helmkamp 1984-5-2 D- 26 Riverside Big Morongo Cyn, 3-3.5 mi below the caretaker's house at the Big Morongo Preserve 550 Comment
  UCR103636  Cryptantha barbigera George K. Helmkamp, E. A. Helmkamp 1998-3-19 2932 Imperial Sonoran (Colorado) Desert, Imperial Dam area, just south of the dam on Hwy S-24. 76 Comment
  UCR132755  Cryptantha barbigera George K. Helmkamp 1984-5-2 D- 26 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 Comment
  UCR132759  Cryptantha barbigera George K. Helmkamp 1984-4-29 A- 32 A San Bernardino Little San Bernardino Mtns., Big Morongo Canyon near the Riverside Co. line, 2 mi. below the Big Morongo Preserve headquarters 701 Comment
  UCR206584  Cryptantha echinella George K. Helmkamp, Ann Kerchner 2009-7-25 15291 Amador Sierra Nevada Mountains, south side of CA-88, 3.2 miles west of the Alpine Co. line; near Martin Meadow 2306 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
  RSA489121  Cryptantha maritima George K. Helmkamp 1988-2-28 1 Imperial Sandy flat just N of Signal Mtn., S of Hwy 98. [Mount Signal 10 km cell; PG-1N, 2E] 31 Comment
  CLARK-A1045-773  Cryptantha micrantha George K. Helmkamp 1977-6-6 San Bernardino San Bernardino Mountains meadow at the edge of a drying, temporary pool; ; Keller Peak 7.5'Q 2133 Comment
  UCR110966  Cryptantha micrantha var. lepida George K. Helmkamp 1998-6-27 4096 Riverside Santa Rosa Mtns., 3.3 miles south of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail, FS Rd. 7S02), in vicinity of an unnamed spring 1585 Comment
  CLARK-A1045-16  Cryptantha nevadensis George K. Helmkamp 1977-4-21 San Bernardino Adelanto 2 miles north of Adelanto, and east of U.S.Highway 395; Creosote Bush scrub area; ; Adelanto 7.5'Q 883 Comment
  UCR103304  Cryptantha pterocarya var. pterocarya George K. Helmkamp 1998-4-4 3149 Riverside Sonoran (Colorado) Desert, junction of Calif. Hwy 62 (Twentynine Palms Hwy) & Calif. Hwy 177 (Desert Center-Rice Rd) 457 Comment
  CAS-BOT-BC227834  Cryptantha simulans G. K. Helmkamp; E. A. Helmkamp 2011-7-19 17846 Calaveras Northern Sierra Nevada Mountains Foothills: Forestry Route 5N75, 1.1 miles west of Boards Crossing bridge over North Fork Stanislaus River 1280 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
  CLARK-A1045-1134  Cryptantha torreyana 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
  RSA756762  Cryptantha torreyana George K. Helmkamp, Amy Barnes 2009-7-8 15126 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
  SBBG126180  Cryptantha torreyana G. K. Helmkamp with E. A. Helmkamp 2009-6-11 14957 Shasta McCumber lake Rd, at S end of McCumber Lake and 3.3 mi NE of its jct with St Hwy 44 1099 Comment
  UCR121467  Cryptogramma cascadensis George K. Helmkamp, E. A. Helmkamp 1999-6-30 5079 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  UCD127372  Cymopterus terebinthinus var. californicus G. K. Helmkamp; E. A. Helmkamp 2007-7-7 12505 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 12.0 miles south of its junction with CA-88. 2549 Comment
  SEINET2043121 Image available Cynodon dactylon George K. Helmkamp, Elizabeth Helmkamp 2000-4-4 5350 San Bernardino Colorado Desert: Sacramento Spring. Along CA-95, 1.6 mi N of I-40. 396 Comment
  UCR188490  Cynodon dactylon George K. Helmkamp, E. A. Helmkamp 2007-9-30 13047 Sutter Sacramento Valley, Oak Ave. at its junction with CA-99, about 2.8 miles north of the Feather River crossing 8 Comment
  UCR122620  Cynosurus echinatus George K. Helmkamp, E. A. Helmkamp 2001-5-29 6704 San Benito South Coast Range, Gabilan Range, 7.1 mi. south of San Juan Bautista on Hwy G-1 488 Comment
  UCR173792  Cynosurus echinatus George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10595 El Dorado Northern Sierra Nevada foothills, along Hwy US-50, 0.6 mile east of White Hall 1055 Comment
  UCR175214  Cynosurus echinatus George K. Helmkamp, Elizabeth Helmkamp 2006-5-4 10296 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
  UCR217163  Cynosurus echinatus George K. Helmkamp, E. A. Helmkamp 2010-5-17 16050 El Dorado Sierra Nevada Mountains Foothills, Pine Hill Road at the junction with Bertana Court; southeast edge of State Ecological Preserve, 1.6 mi. NW (293 deg. ) of Rescue 459 Comment
  UCR246639  Cynosurus echinatus George K. Helmkamp, E. A. Helmkamp 2012-6-6 19148 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 5.8 miles south of its junction with CA-88, 6.2 mi. SW (246 deg. ) of Bear River Reservoir dam 1465 Comment
  UCR171626  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2005-6-12 9669 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
  UCR209770  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2009-8-14 15464 El Dorado Sierra Nevada Mountains Foothills, junction of Sand Ridge Road and Cutaway Lane, 2.0 miles west of Bucks Bar Road 642 Comment
  UCR241318  Cyperus eragrostis George K. Helmkamp, E. A. Helmkamp 2012-9-20 19877 Amador Northern Sierra Nevada Mountains Foothills, along Hwy E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  UCR91838  Cyperus eragrostis George K. Helmkamp 1996-5-24 1044 San Luis Obispo Central Coast, Los Osos, along trail to quarry, 0.6 mile east of South Bay Blvd. 95 Comment
  UCR171542  Cyperus esculentus George K. Helmkamp, E. A. Helmkamp 2005-7-31 9734 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  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
  SEINET3246192  Cyperus odoratus G. K. Helmkamp, E. A. Helmkamp 2009-1 15552 Sutter Sacramento Valley: along Nicolaus Ave., 2.2 miles northwest of the Placer Co. line, 4.4 miles ENE (86) of Nicolaus 8 Comment
  UCR14391  Cyperus rotundus George K. Helmkamp 1974-7-14 s.n. Riverside Riverside, Massachusetts at Iowa Street Comment
  SEINET3271541 Image available Cystopteris fragilis George K. Helmkamp, E. A. Helmkamp 2007-4-27 11859 El Dorado Foothills, Northern Sierra Nevada Mountains; Bridal Veil Falls, Esmeralda Creek, along US-50 east of Pacific House 1027 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
  CLARK-A1045-197  Dalea fremontii var. minutifolia George K. Helmkamp 1978-5-6 San Bernardino Mojave Desert west of Kingston Range; ; Horsethief Springs 15'Q 1066 Comment
  SEINET2042028 Image available Dalea mollis George Helmkamp, E. A. Helmkamp 2001-3-30 6379 San Bernardino Mojave Desert; CA-62, 16.2 mi E of Utah Tr. (29 Palms) near Dale Lake. 366 Comment
  UCR91811  Danthonia californica George K. Helmkamp 1996-5-24 1049 San Luis Obispo Central Coast, Los Osos, along trail to quarry, 0.6 mile east of South Bay Blvd. 95 Comment
  UCR170415  Daucus carota George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10022 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
  UCR173161  Delphinium gracilentum George K. Helmkamp, Elizabeth Helmkamp 2006-4-27 10225 El Dorado Northern Sierra Nevada Foothills, 2.1 mi. south of Pleasant Valley Road along French Creek Road, SE of Shingle Springs 369 Comment
  UCR176213  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2006-7-7 10843 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  UCR190674  Delphinium nuttallianum George K. Helmkamp 2007-6-29 12424 Amador Northern Sierra Nevada Mountains, Sandy Cove picnic area southeast of CA-88 beside the west edge of Silver Lake 2244 Comment
  UCR197553  Delphinium nuttallianum George K. Helmkamp, E. A. Helmkamp 2008-6-23 13711 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
  UCR249988  Delphinium nuttallianum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20933 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
  UCR130991  Delphinium parishii subsp. parishii George K. Helmkamp, E. A. Helmkamp 1998-5-3 3512 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  SD193347  Delphinium parryi subsp. parryi G. K. Helmkamp, Elizabeth Helmkamp 2005-5-12 9442 Monterey 8.0 miles west of US 101 on Highway Ca-G-18 in Hames Valley. 341 Comment
  UCR140065  Delphinium patens subsp. hepaticoideum George K. Helmkamp 2004-4-14 8424 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR106727  Delphinium patens subsp. patens George K. Helmkamp, E. A. Helmkamp 1998-5-18 3803 Santa Clara Central Coast Range, E of San Jose; Kincaid Road 1.1 mi north of Mt. Hamilton Road. ( =Calif. Hwy 130) 793 Comment
  UCR140364  Dendromecon rigida George K. Helmkamp 2004-4-14 8435 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  SEINET3411998 Image available Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2012-6-13 19174 Nevada Northern Sierra Nevada Mountains Foothills: Washington Road, 3.6 miles N of its junction with Ca-20 1006 Comment
  UCR191151  Deschampsia elongata George K. Helmkamp, E. A. Helmkamp 2007-6-8 12304 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 5.4 miles south of Mormon Emigrant Trail, generally east of Jenkinson Lake 1372 Comment
  UCR122955  Descurainia pinnata subsp. halictorum George K. Helmkamp, E. A. Helmkamp 2001-3-30 6455 San Bernardino Eastern Mojave Desert, 13.5 mi north of Calif. Hwy 62 along US-95 then 0.1 mi E 274 Comment
  UCR122407  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2002-4-24 7531 Madera Western Sierra Nevada foothills, Auberry Rd (Rd 200/North Fork Rd.) 5.0 mi south of North Fork 503 Comment
  UCR161984  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2005-3-13 9129 Santa Barbara South Outer Coast Ranges, Sierra Madre Mountains; Tepusquet Canyon 8.7 mi. south of Calif. Highway 166 396 Comment
  UCR171115  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2006-3-26 10106 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; Rock Creek Road, 0.9 mi east of Calif. Highway 193 396 Comment
  UCR197543  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2008-3-22 13224 Calaveras San Joaquin Valley / Sierra Nevada Mountains Foothills, along CA-26, 3.7 miles southwest of Valley Springs at Lime Creek Road 143 Comment
  UCR198431  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2008-4-30 13367 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
  UCR242633  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, E. A. Helmkamp 2010-4-3 15797 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
  UCR250685  Dichelostemma capitatum subsp. capitatum George K. Helmkamp, Mary Alice Barnes 2013-4-18 20348 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
  UCR231312  Dichelostemma multiflorum George K. Helmkamp, E. A. Helmkamp 2011-5-6 17189 Yuba East edge of Sacramento Valley, Camp Far West Road, 0.9 mile west of the junction at Camp Far West Reservoir 65 Comment
  UCR231333  Dichelostemma multiflorum George K. Helmkamp, E. A. Helmkamp 2011-5-6 17184 Yuba East edge of Sacramento Valley, Camp Far West Road, 0.3 mile north of the junction with Hokan Lane, vicinity of Camp Far West Reservoir 105 Comment
  UCR207903  Dichelostemma volubile George K. Helmkamp, E. A. Helmkamp 2009-5-14 14691 El Dorado Sierra Nevada Mountains Foothills, hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 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
  SEINET4560746  Digitalis purpurea George K. Helmkamp, E. A. Helmkamp 2011-1 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
  CAS-BOT-BC174784  Diplacus aurantiacus G. K. Helmkamp 2004-5-23 8584 Santa Barbara Southern Central Coast: Lompoc-Casmalia Rd, 1.5 mi S of the junction to Casmalia 183 Comment
  SD237617  Diplacus aurantiacus G. K. Helmkamp, E. A. Helmkamp 2010-4-23 15931 Placer Sierra Nevada Mountains Foothills: Salmon Falls Road at the Salmon Falls crossing of the American River (Pilot 7.5'Q) 156 Comment
  SEINET273073 Image available Diplacus parviflorus George K. Helmkamp, E. A. Helmkamp 1998-1 3697 Santa Clara Sierra Azul: Hicks Rd at S end of San Jose; 3.2mi S of Camden Av. 152 Comment
  SD237621  Diplacus torreyi G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15254 El Dorado Sierra Nevada Mountains: Wrights Lake Road, 2.7 miles north of its junction with US-50, c. 0.25 mile due S of Chimney Flat (Pyramid Peak 7.5'Q) 2000 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
  UCR256671  Dipsacus sativus George K. Helmkamp, Mary Alice Barnes 2013-5-17 20630 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
  SEINET269231 Image available Distichlis spicata G. Helmkamp 1996-6-11 1116 San Bernardino San Bernardino Mtns. at the southwest end of Baldwin Lake. 2164 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
  UCR121865  Dithyrea californica George K. Helmkamp, E. A. Helmkamp 2001-3-24 6301 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  UCR122644  Dithyrea californica George K. Helmkamp, E. A. Helmkamp 1998-3-16 2842 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
  CAS-BOT-BC140641  Dittrichia graveolens G. K. Helmkamp; E. A. Helmkamp 2009-10-30 15714 El Dorado Sierra Nevada Mountains Foothills: Country Club Drive 0.1 mile east of its junction with Bass Lake Road, between El Dorado Hills and Cameron Park 343 Comment
  CAS-BOT-BC226942  Dittrichia graveolens George K. Helmkamp; E. A. Helmkamp 2011-11-21 18479 Calaveras Northern Sierra Nevada Mountain Foothills: along CA-12 at the west end of the city of Burson 125 Comment
  SEINET2033393 Image available Dodecatheon hendersonii George K. Helmkamp, E. A. Helmkamp 2008-5-4 13396 Amador Sierra Nevada Mountains Foothills: along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  UCR207137  Dodecatheon hendersonii George K. Helmkamp, E. A. Helmkamp 2009-4-4 14497 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 0.8 mile west of its junction with Happy Valley Cut-off 607 Comment
  RSA752661  Draba verna George K. Helmkamp, E. A. Helmkamp 2007-3-10 11606 El Dorado Rattlesnake Bar Rd, 3.0 miles southwest of Calif. Hwy 49, SW of Pilot Hill 390 Comment
  UCR206702  Draba verna George K. Helmkamp, E. A. Helmkamp 2009-3-19 14433 El Dorado Sierra Nevada Mtns. Foothills, Meadow Brook Road, 1.3 miles east of CA-193 and at the junction with Bear Creek Rd 680 Comment
  UCR87265  Draba verna George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 16.1 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR87535  Draba verna George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 35.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR248397  Draperia systyla George K. Helmkamp, Elizabeth Helmkamp 2013-7-25 22023 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road, 7.4 miles east of the junction with Volcanoville Road 1320 Comment
  CLARK-A1045-1114  Drosera rotundifolia George K. Helmkamp 1977-9-1 V Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR88210  Drymocallis lactea var. lactea George K. Helmkamp 1995-9-21 1- 12 B Mono Eastern Sierra Nevada Mountains, south edge of Lake Mary, south of Mammoth Lakes 2805 Comment
  RSA710335  Dryopteris arguta George K. Helmkamp 2004-4-14 8438 Santa Barbara Santa Inez Mountains: Cold Spring Canyon, along Stagecoach Rd. just off Hwy 154, ca. 5 miles SE of Lake Cachuma. 488 Comment
  UCR198485  Dryopteris arguta George K. Helmkamp, E. A. Helmkamp 2008-5-4 13388 A Amador Sierra Nevada Mountains Foothills, along Tiger Creek Road, 0.3 mi east of the turnoff to Tiger Creek Reservoir 774 Comment
  UCR218132  Dryopteris arguta George K. Helmkamp, E. A. Helmkamp 2010-6-26 16385 Placer Sierra Nevada Mountains Foothills, junction of Canyon Way and Yankee Jim's Road, east of I-80 between Weimar and Colfax 616 Comment
  UCR233024  Dysphania botrys George K. Helmkamp, E. A. Helmkamp 2011-9-24 18327 El Dorado Northern Sierra Nevada Mountains, Loon Lake Road at the junction to the campground at the south end of the lake 1973 Comment
  UCR261628  Dysphania botrys George K. Helmkamp, Amy Barnes 2014-10-10 23138 Amador Northern Sierra Nevada Mountains, Bear River Road, 0.1 mile south of it juction with CA-88 1992 Comment
  UCR201932  Echinochloa colona George K. Helmkamp, E. A. Helmkamp 2008-10-9 14228 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
  UCR241751  Echinochloa colona George K. Helmkamp, E. A. Helmkamp 2012-10-9 20009 Nevada Northern Sierra Nevada Mountains Foothills, Higgins Corner; Combie Road, 0.1 mile east of its junction with CA-49, between Auburn and Grass Valley 445 Comment
  RSA749526  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2008-10-6 14208 Yuba Ostrom #3 Road, 1.2 miles east of junction with CA-65, southeast of Olivehurst 20 Comment
  SD236141  Echinochloa crus-galli G. K. Helmkamp, Elizabeth Helmkamp 2005-9-1 9833 El Dorado Northern Sierra Nevada Foothills: E of Sacramento; Sand Canyon Road, 0.3 mi E of CA Highway 49 and Logtown Ridge 280 Comment
  SEINET2473441 Image available Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2007-1 12819 Amador Northern Sierra Nevada Mountains Foothills; along Hwy CA-49 at the south end of Plymouth 323 Comment
  UCR179805  Echinochloa crus-galli George K. Helmkamp, E. A. Helmkamp 2006-10-20 11543 El Dorado Northern Sierra Nevada Mountains Foothills, Bucks Bar Road, 3.9 miles south of Pleasant Valley Road, general vicinity of Somerset 625 Comment
  UCR140068  Ehrharta calycina George K. Helmkamp 2004-3-13 8352 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR231322  Eleocharis macrostachya George K. Helmkamp, E. A. Helmkamp 2011-5-6 17206 Yuba East edge of Sacramento Valley, junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 deg. ) of Wheatland 56 Comment
  SD232558  Elodea nuttallii George Helmkamp 1996-9-26 1231 Mono Twin Lakes north of Mammoth Lakes City. Shallow water at the lake edge. 2621 Comment
  UCD63240  Elymus glaucus subsp. glaucus G. K. Helmkamp; E. A. Helmkamp 2007-8-4 12682 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
  UCR218234  Elymus glaucus subsp. glaucus George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16436 Placer Sierra Nevada Mountains Foothills, Iowa Hill Road, 1.9 miles southeast of its junction with Canyon Way in Colfax 415 Comment
  UCR256664  Elymus glaucus var. glaucus George K. Helmkamp, Elizabeth Helmkamp 2013-5-30 20730 Nevada Northern Sierra Nevada Mountains, along Hwy CA-20, 1.6 miles northeast of Pine Flat Way, north of Scotts Flat Reservoir 1189 Comment
  RSA0050420  Elymus stebbinsii George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-15 20879 El Dorado Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  UCR249173  Elymus stebbinsii George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20879 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  UCR92638  Ephedra viridis George K. Helmkamp 1993-4-24 s.n. San Bernardino Northeastern Mojave Desert, along Smith Talc Road, c. 9 miles east of Tecopa [Pass?, Inyo Co.; probably after Sm. T. Rd. transition to Excelsior Mine Rd.] 1067 Comment
  RSA755563  Epilobium George K. Helmkamp, E. A. Helmkamp 2009-8-19 15509 El Dorado Wright s Lake Road, 8.6 miles north of its upper junction with Ice House Road 1785 Comment
  UCR104838  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-26 2138 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR114370  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, E. A. Helmkamp 1997-9-8 2275 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  UCR123906  Epilobium angustifolium subsp. circumvagum George K. Helmkamp, E. A. Helmkamp 2001-7-6 6849 Plumas Sierra Nevada Mountains, Calif. Hwy 89, ESE of Lake Almanor at Crescent Mills 976 Comment
  CAS-BOT-BC526863  Epilobium brachycarpum George K. Helmkamp; E. A. Helmkamp 2012-9-7 19762 Amador Northern Sierra Nevada Mountains Foothills: along CA-49, 1.2 mi N of the jct with Fiddletown Rd at Plymouth 298 Comment
  SEINET1004958  Epilobium brachycarpum G. K. Helmkamp, E. A. Helmkamp 2006-1 11481 Calaveras Along Hwy CA-26, 0.8 mi east of Ca-49 in the vicinity of Mokulumne Hill. 488 Comment
  UCD105375  Epilobium brachycarpum G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13064 Butte Northern Sacramento Valley. East Gridley Road at the west edge of the Feather River bridge. 27 Comment
  UCR119829  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2000-9-2 5969 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon, 2.2 mi west of Los Osos Valley Road 137 Comment
  UCR179394  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2006-9-20 11437 El Dorado Northern Sierra Nevada Mountains Foothills, West Meadow Road 0.3 mile west of its junction with Ice House Road 1050 Comment
  UCR189648  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-8-16 12774 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 0.9 mile northeast of the junction with Bear River Reservoir Road 2076 Comment
  UCR190657  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2007-5-23 12079 Placer Northern Sierra Nevada Mountains Foothills, junction of Iowa Hill Road and Finning Mill Road (U. S. F. S. Rd #10) in the Sugar Pine Recreation area 1137 Comment
  UCR201526  Epilobium brachycarpum George K. Helmkamp, E. A. Helmkamp 2008-9-28 14172 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
  UCR245585  Epilobium brachycarpum George K. Helmkamp, Amy Barnes 2013-9-24 22346 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  UCR67453  Epilobium canum subsp. canum George K. Helmkamp 1990-9-5 s.n. Monterey Central Coast, 2 miles north of Gorda 46 Comment
  UCR193511  Epilobium canum subsp. latifolium George K. Helmkamp, E. A. Helmkamp 2007-9-11 12942 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road 3.2 miles north of its junction with US-50 1991 Comment
  UCD105622  Epilobium ciliatum G. K. Helmkamp; E. A. Helmkamp 2007-8-26 12811 Amador Northern Sierra Nevada Mountains. Along Hwy CA-49 at mile-20, 2.1 miles north of Plymouth; beside Blue Indian Creek. 299 Comment
  UCR121551  Epilobium ciliatum George K. Helmkamp, E. A. Helmkamp 1999-6-28 4998 San Mateo Pescadero Creek Watershed, Bean Hollow Road 0.3 mi south of Pescadero Road (SW of Pescadero). Slopes above Butano Creek 61 Comment
  UCR18539  Epilobium ciliatum George K. Helmkamp 1974-9-28 s.n. San Luis Obispo Central Coast, Morro Bay area, Hazard Cyn, near ocean 34 Comment
  UCR250631  Epilobium ciliatum George K. Helmkamp, E. A. Helmkamp 2007-8-16 12762 Amador Northern Sierra Nevada Mountains, along the south side of Bear River Reservoir just east of the spillway 1777 Comment
  UCR215775  Epilobium ciliatum subsp. ciliatum George K. Helmkamp, E. A. Helmkamp 2009-7-30 15348 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR178660  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2006-9-7 11337 A El Dorado Northern Sierra Nevada Mountains, Ice House Road about 5.5 miles north of US-50 1637 Comment
  UCR179358  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2006-9-20 11417 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Ice House Road [at Riverton] and US-50 east of Pacific 1000 Comment
  UCR183813  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2006-10-27 11577 El Dorado Northern Sierra Nevada Mountains Foothills, City of Placerville; along Spring Street, 0.1 mile north of its junction with Calif. Hwy 49 573 Comment
  UCR233329  Epilobium densiflorum George K. Helmkamp, E. A. Helmkamp 2011-8-6 17962 Amador Northern Sierra Nevada Mountains, Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  SEINET13276722 Image available Epilobium glaberrimum subsp. glaberrimum George K. Helmkamp, Amy Barnes 2012-1 19623 Alpine Northern Sierra Nevada Mountains: along CA-89/Carson Pass Hwy in West Carson, 1.4 miles east of the junction with CA-88 (Freel Peak 7.5' Q.) 2033 Comment
  UCR129538  Epilobium obcordatum George K. Helmkamp, E. A. Helmkamp 2001-7-8 6833 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  RSA337152A  Epilobium oregonense George K. Helmkamp 1974-7-9 s.n. San Bernardino Angeles Oaks, roadside along CA 38. 1982 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
  UCR250597  Equisetum arvense George K. Helmkamp, Mary Alice Barnes 2013-4-24 20393 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26 (West Point-Pioneer Rd.), at the west side of the bridge over North Fork Mokelumne River 654 Comment
  RSA750327  Eragrostis curvula var. curvula George K. Helmkamp 2004-6-12 8632 Santa Barbara Along Calif. Hwy 135, 0.9 mi N of San Antonio Rd (S of Orcutt) 152 Comment
  UCR100575  Eragrostis mexicana subsp. mexicana George K. Helmkamp 1997-11-1 2518 Riverside Sonoran (Colorado) Desert, Bermuda Dunes, 41st St and Sparky (just east of Washington and south of I-10) 30 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
  CLARK-A1045-13  Eremalche exilis George K. Helmkamp 1977-4-21 San Bernardino Adelanto 2 miles north of Adelanto, east of U.S. 395; creosote bush scrub; ; Adelanto 7.5' Q 883 Comment
  UCD97933  Eremogone kingii var. glabrescens G. K. Helmkamp; E. A. Helmkamp 2006-8-30 11299 Alpine Northern Sierra Nevada Mountains; Woods Lake, south of CA-88 and generally SE of Caples Lake. Besides Woods Creek. 2521 Comment
  UCD170698  Eremothera refracta G. K. Helmkamp; E. A. Helmkamp 2001-3-30 6422 San Bernardino Eastern Mojave Desert: US-95, 8.5 mi south of I-40. 351 Comment
  UCR115589  Eriastrum densifolium subsp. densifolium George K. Helmkamp, E. A. Helmkamp 2000-6-15 5677 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR160757  Eriastrum densifolium subsp. densifolium George K. Helmkamp, E. A. Helmkamp 2005-6-12 9655 San Luis Obispo Central Coast Range, along Calif. Hwy 58 (Carrizo Hwy), 22.2 miles east of Santa Margarita; near Camatta Creek 552 Comment
  UCR130710  Eriastrum eremicum subsp. eremicum George K. Helmkamp, E. A. Helmkamp 1998-6-27 4076 Riverside San Jacinto Mtns., Garner Valley, along Hwy 74 at Morris Ranch Rd. 1372 Comment
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Nov 13 2018
  SD247323  Ericameria arborescens George K. Helmkamp, E. A. Helmkamp 2013-9-13 22295 Amador Northern Sierra Nevada Mountains Foothills: Fiddletown Road, 0.4 mile west of its junction with Shake Ridge Road. 977 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
  UCR67022  Ericameria arborescens George K. Helmkamp 1990-9-3 s.n. San Luis Obispo Central Coast, south end of Morro Bay, southwest of Baywood Park 15 Comment
  SD197674  Ericameria bloomeri G. K. Helmkamp, E. A. Helmkamp 2008-8-8 14001 Alpine Northern Sierra Nevada Mountains: along Blue Lake road, 8.5 miles south of its junction with CA-88. 2497 Comment
  UCR202751  Ericameria bloomeri George K. Helmkamp, E. A. Helmkamp 2008-8-8 14001 Alpine Northern Sierra Nevada Mountains, along Blue Lake road, 8.5 miles south of its junction with CA-88 2497 Comment
  SD243084  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 milse NNE of its junction with Wentworth Springs Road (Loon Lake 7.5'Q) 1942 Comment
  UCR132553  Ericameria ericoides George K. Helmkamp 2003-9-8 8121 San Luis Obispo Central Coast, Saltwater ocean inlet 0.2 mile SW of Oceano Airport 6 Comment
  RSA613935  Ericameria linearifolia George K. Helmkamp, E. A. Helmkamp 1998-4-8 3213 San Luis Obispo Elkhorn Grade Rd, 6.3 mi. NW of jct with CA hwy 33 (roughly W of Maricopa). 549 Comment
  UCR58455  Ericameria pinifolia George K. Helmkamp 1989-10-7 s.n. Riverside San Jacinto Mtns, N slope of Thomas Mtn, 1 mi. SW of Hwy 74 on Thomas Mtn Road 1500 Comment
  SD197675  Erigeron G. K. Helmkamp, E. A. Helmkamp 2008-8-1 13946 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 2.2 miles south of the entrance to Wright's Lake. 2070 Comment
  SD243085  Erigeron breweri George K. Helmkamp, E. A. Helmkamp 2010-8-20 16818 El Dorado Northern Sierra Nevada Mountains: near abandoned Iron Mountain ski resort, road spur parallel to Mormon Emigrant Trail about 0.2 mile west of its junction with CA-88 (Tragedy Spring 7.5'Q) 2238 Comment
  UCR242353  Erigeron breweri George K. Helmkamp, E. A. Helmkamp 2010-8-20 16821 El Dorado Northern Sierra Nevada Mountains, junction of Forest Routes 10N98 and 10N39, about 0.1 mile north of Silver Fork Road, 2.4 mi. NW of Hwy 88 2091 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
  RSA614914  Erigeron coulteri George K. Helmkamp, E. A. Helmkamp 1997-9-8 2258 Mono South side of Lake Mary, South of Mammoth Lakes. 2744 Comment
  UCR27490  Erigeron foliosus var. foliosus George K. Helmkamp 1982-9-17 s.n. Kern 4.2 mi. above snow gate on the road to Mt. Pinos 2134 Comment
  UCR217394  Erigeron foliosus var. hartwegii George K. Helmkamp, E. A. Helmkamp 2010-5-17 16073 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
  UCD131958  Erigeron glacialis var. glacialis G. K. Helmkamp; E. A. Helmkamp 2006-7-31 11047 El Dorado Northern Sierra Nevada Mountains, along Wright's Lake Road (Forestry Route 4), 3.3. miles north of Hwy US-50. 2049 Comment
  UCD131959  Erigeron glacialis var. glacialis G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11133 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
  UCR106444  Erigeron glaucus George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2149 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  RSA0012128  Erigeron inornatus var. inornatus George K. Helmkamp, E. A. Helmkamp 2010-8-26 16867 Nevada Eagle Lakes Road, about 0.5 mile west of its junction with Carlyle Road, 5.8 mi. NE (66deg.) of Emigrant Gap, N of I-80 1655 Comment
  CLARK-A1045-525  Erigeron parishii George K. Helmkamp 1979-6-5 #3 San Bernardino San Bernardino Mountains limestone slope above Spring; ; Big Bear City 7.5'Q 1371 Comment
  UCR176275  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2006-8-3 11133 Alpine Northern Sierra Nevada Mountains, Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake 2509 Comment
  UCR196950  Erigeron peregrinus subsp. callianthemus George K. Helmkamp, E. A. Helmkamp 2008-7-16 13824 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR232619  Eriochloa contracta George K. Helmkamp, E. A. Helmkamp 2011-10-8 18406 Sutter Northern Sacramento Valley, Live Oak, Larkin Road, 0.3 mile south of Live Oak and just west of CA-99 34 Comment
  UCD119256  Eriodictyon californicum G. K. Helmkamp; Elizabeth Helmkamp 2006-5-20 10504 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
  UCR160752  Eriodictyon californicum George K. Helmkamp, E. A. Helmkamp 2005-6-5 9523 Monterey Outer Central Coast Ranges; Santa Lucia Range, 5.0 mi east of Calif. Hwy 1 along Los Burros Road 826 Comment
  UCR253227  Eriodictyon californicum George K. Helmkamp, Amy Barnes 2014-4-23 22815 Placer Sierra Nevada Mountains Foothills, Spring Garden Road, at the north side of its junction with Foresthill Road, 8.4 km west of Foresthill 720 Comment
  CAS-BOT-BC188071  Eriodictyon tomentosum G. Helmkamp 1994-5-18 91 -2 San Luis Obispo Alamo Cyn, 7 miles E of US101 on CA166 then 4 miles N (generally, NE of Twitchell reservoir) 213 Comment
  RSA614910  Eriogonum baileyi var. baileyi George K. Helmkamp, E. A. Helmkamp 1997-9-8 2265 Mono South side of Lake Mary, South of Mammoth Lakes. 2744 Comment
  SD255828  Eriogonum baileyi var. baileyi George K. Helmkamp, Amy Barnes 2014-8-27 23045 Mono Northern Sierra Nevada Mountains: Monitor Pass along CA-89, 0.6 mile south of the junction with Big Springs Road (Topaz Lake 7.5'Q) 2360 Comment
  UCR15443  Eriogonum baileyi var. baileyi George K. Helmkamp 1977-9-1 s.n. El Dorado Sierra Nevada Mtns., Grass Lake at Luther Pass 2356 Comment
  UCR99907  Eriogonum baileyi var. baileyi George K. Helmkamp 1997-9-29 2437 Inyo Sierra Nevada Mountains, Onion Valley Road, 7.9 mi west of Hwy US-395 from Independence 2159 Comment
  UCR79297  Eriogonum davidsonii George K. Helmkamp 1993-9-12 23- 06 San Bernardino San Bernardino Mtns., edge of Burns Canyon 1375 Comment
  UCR13820  Eriogonum deflexum George K. Helmkamp 1973-6-15 s.n. Inyo Owens Valley, Owens River at Pleasant Valley, near Mono county line 1372 Comment
  UCR100346  Eriogonum deflexum var. deflexum George K. Helmkamp 1997-9-30 2499 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR14591  Eriogonum deserticola George K. Helmkamp 1975-3-24 s.n. Imperial Sonoran (Colorado) Desert, Sand dunes immediately [west] of Glamis 40 Comment
  OBI43748  Eriogonum hoffmannii G. K. Helmkamp 1986-9-28 s.n. Inyo Furnace Crk wash, along hwy 190 between Death Valley jctn and Furnace Crk, 1.5 mi E of D.V. Nat. monument border Comment
  SBBG127559  Eriogonum marifolium G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15257 El Dorado Wrights Lake Rd, 4.1 mi N of its jct with US-50 and at the N side of Lyons Crk crossing 2015 Comment
  UCR136224  Eriogonum microthecum var. corymbosoides George K. Helmkamp, E. A. Helmkamp 1999-9-30 5316 San Bernardino San Bernardino Mountains, junction of 2N02 (probably Round Valley Rd.) and Calif. Hwy 38 SE of Baldwin Lake 2454 Comment
  CLARK-A1045-971  Eriogonum nidularium George K. Helmkamp 1977-6-11 A Kern Red Rock Canyon Southwest edge of El Paso Mountains; entry to Canyon; junction of US Highway 6 and road to California City; ; Cantil 7.5'Q 761 Comment
  UCR100356  Eriogonum nidularium George K. Helmkamp 1997-9-30 2487 Inyo White Mountains, [Deep Springs Valley], east side of White Mountains 1585 Comment
  UCR14648  Eriogonum nidularium George K. Helmkamp 1975-6-6 s.n. San Bernardino Eastern Mojave Desert, Clark Mountain [area, Mescal Range], Mountain Pass, 0.5 mi south of Interstate 15 1463 Comment
  RSA0035527  Eriogonum nudum George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-5 20791 Sierra Along CA-49, 1.9 miles NE of the Yuba County line, NE of Camptonville 796 Comment
  SBBG127573  Eriogonum nudum var. deductum G. K. Helmkamp, E. A. Helmkamp 2009-7-30 15331 Calaveras Ganns Meadow Drive just S of its jct with CA-4, 16.7 mi NE of Arnold 2067 Comment
  SBBG129027  Eriogonum nudum var. deductum G. K. Helmkamp, E. A. Helmkamp 2013-8-14 22245 Alpine CA-4, 12.4 mi SW of the CA-89 jct and just N of Kinney Reservoir 2540 Comment
  UCD100562  Eriogonum nudum var. deductum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11001 El Dorado Northern Sierra Nevada Mtns., Echo Summit along Hwy US-50 at entrance to the road maintenance station. 2245 Comment
  UCD100567  Eriogonum nudum var. deductum G. 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
  UCR179345  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2006-9-12 11368 El Dorado Northern Sierra Nevada Mountains, Along Calif. Hwy 89, 1.2 miles west of the Alpine County line. General area of Luther Pass and Grass Lake 2363 Comment
  UCR219269  Eriogonum nudum var. deductum George K. Helmkamp, E. A. Helmkamp 2010-7-13 16528 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  UCR249873  Eriogonum nudum var. deductum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20905 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail at the junction with Pilliken Road 1825 Comment
  UCR250150  Eriogonum nudum var. deductum George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20927 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, north side of its junction with Mormon Emigrant Trail 2188 Comment
  SEINET11260118  Eriogonum nudum var. nudum George K. Helmkamp 2007-7-7 12474 El Dorado Northern Sierra Nevada Mountains: along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area.; 0 2338 Comment
  UCR240947  Eriogonum nudum var. nudum George K. Helmkamp, E. A. Helmkamp 2012-9-25 19899 Placer Northern Sierra Nevada Mountains, junction of Blue Canyon Road and Putt Road, just south of I-80, west of Emigrant Gap 1634 Comment
  UCD100546  Eriogonum nudum var. oblongifolium G. K. Helmkamp; E. A. Helmkamp 2007-9-1 12860 El Dorado northern Sierra Nevada Mountains, Happy Valley cutoff road 0.2 mile southeast of its junction with CA-E-16 (generally northeast of Somerset.) 607 Comment
  UCR170817  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2005-9-30 9940 Placer Northern Sierra Nevada Mtns., Hampshire Rocks Road south of the I-80 Rainbow exit (c. 2 mi east of Cisco Grove) 1805 Comment
  UCR205162  Eriogonum nudum var. oblongifolium George K. Helmkamp, E. A. Helmkamp 2008-10-30 14306 Amador Northern Sierra Nevada Mountains Foothills, along CA-124 at the north boundary of Ione 91 Comment
  UCR122610  Eriogonum plumatella George K. Helmkamp, E. A. Helmkamp 1999-9-30 5296 San Bernardino San Bernardino Mountains, 5.7 miles up Burns Cyn Rd from Rimrock Rd., NW of Pioneertown 1768 Comment
  UCD100883  Eriogonum roseum G. K. Helmkamp; E. A. Helmkamp 2007-9-1 12858 El Dorado northern Sierra Nevada Mountains; Happy Valley cutoff road, 0.2 mile southeast of its junction with CA-E-16 (generally northeast of Somerset.) 607 Comment
  CLARK-A1045-549  Eriogonum saxatile George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains 5.7 miles east of Cajon Junction, off Interstate Highway 15; Cajon 7.5'Q Comment
  SD143777  Eriogonum thomasii G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2889 Imperial 4.7 mi. N of Winterhaven on Picacho Rd & 1 mi. NW of the All-American Canal 75 Comment
  UCR103293  Eriogonum thomasii George K. Helmkamp 1998-3-30 2994 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR104806  Eriogonum thomasii George K. Helmkamp, E. A. Helmkamp 1998-2-18 2740 Riverside Chuckwalla Mtns, Graham Pass Rd, 10.6 mi. SSW of Chuckwalla Valley Rd. 488 Comment
  CLARK-A1045-212  Eriogonum trichopes George K. Helmkamp 1979-4-18 Riverside Indio Hills Dillon Road at dry wash; Lost Horse Mtn. 15'Q Comment
  UCR134706  Eriogonum umbellatum var. dichrocephalum George K. Helmkamp, E. A. Helmkamp 1998-8-11 4289 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  UCR257661  Eriogonum umbellatum var. nevadense George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19489 Nevada Northern Sierra Nevada Mountains, Stampede Meadows Road, c. 0.65 mile south of the Sierra County line 1738 Comment
  CAS-BOT-BC261817  Eriogonum wrightii var. subscaposum G. K. Helmkamp; E. A. Helmkamp 2009-8-19 15498 El Dorado Sierra Nevada Mountains: along Ice House Road at SW shore of Loon Lake, 2.6 miles south of its end on the north side of the lake 1973 Comment
  SD225078  Eriogonum wrightii var. subscaposum G. K. Helmkamp 1997-9-29 2438 Inyo Sierra Nevada Mtns; Onion Valley Rd, 7.9 mi W of US-395 from Independence. Comment
  CLARK-A1045-1172  Eriophorum gracile George K. Helmkamp 1977-9-3 XI Alpine Sierra Nevada sphagnum bog; ; Freel Peak 7.5'Q 2346 Comment
  UCR103962  Eriophyllum confertiflorum George K. Helmkamp 1997-6-21 2059 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 Comment
  UCR103967  Eriophyllum confertiflorum George K. Helmkamp 1997-6-22 2077 San Luis Obispo Central Coast, South end of Montana de Oro State Park 15 Comment
  UCR115807  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 2000-6-15 5695 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
  UCR157983  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 1998-6-29 4137 Kern Tehachapi Mtns, 2.2 miles east of the Keene turnoff from Calif. Hwy 58 on Woodford to Tehachapi road 793 Comment
  UCR158601  Eriophyllum confertiflorum var. confertiflorum George K. Helmkamp, E. A. Helmkamp 2005-4-16 9350 Santa Barbara Outer South Coast Range, Sierra Madre Mountains, 1.1 mi south of Calif. Hwy 166 on Miranda Pines Road 526 Comment
  SBBG128592  Eriophyllum lanatum var. achilleoides G. K. Helmkamp, E. A. Helmkamp 2011-8-6 17961 Amador Ellis Rd, 2.1 mi S of its jct with CA-88 1794 Comment
  SD239591  Eriophyllum lanatum var. achilleoides G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15061 El Dorado Sierra Nevada Mountains Foothills: Ice Housse Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83a^z) of Pollock Pines. 989 Comment
  SD260181  Eriophyllum lanatum var. achilleoides George K. Helmkamp, Mary Alice Barnes 2013-5-17 20620 Calaveras Northern Sierra Nevada Mountains Foothills: Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30a^z) of Valley Springs. Area with scattered farm buildings. 278 Comment
  UCR193285  Eriophyllum lanatum var. achilleoides George K. Helmkamp, E. A. Helmkamp 2007-6-12 12354 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
  UCR249626  Eriophyllum lanatum var. achilleoides George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20861 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  UCR249641  Eriophyllum lanatum var. achilleoides George K. Helmkamp, Elizabeth Helmkamp 2013-6-5 20781 Sierra Northern Sierra Nevada Mountains Foothills, Along CA-49, 1.7 miles west of Goodyears Bar, c. 11 miles NE of Yuba Co. line 793 Comment
  SD237319  Eriophyllum lanatum var. croceum G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15073 El Dorado Sierra Nevada Mountains: Ice House Road, 7.6 miles north of its junction with CA-50, c. 10.5 air miles NE (74a^z) of Pollock Pines. 1641 Comment
  UCR207438  Eriophyllum lanatum var. croceum George K. Helmkamp, E. A. Helmkamp 2009-7-22 15255 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
  UCR209733  Eriophyllum lanatum var. croceum George K. Helmkamp, E. A. Helmkamp 2009-8-12 15422 Placer Sierra Nevada Mountains, Forest Hill Road, 20.5 miles northeast of the city of Foresthill 1662 Comment
  RSA795040  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, E. A. Helmkamp 2011-8-6 17961 Amador Ellis Road, 2.1 miles south of its junction with CA-88 1794 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
  SEINET11261800  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, E. A. Helmkamp 2012-5-3 18886 El Dorado Northern Sierra Nevada Mountains Foothills: Forebay Road, 4.3 miles N of Pollock Pines.; 0 1046 Comment
  UCR173277  Eriophyllum lanatum var. grandiflorum George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10441 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along Forest Hill Road, 1.8 mi. NE of its junction with Calif. Hwy 49 at the middle fork of the American River 370 Comment
  UCR122315  Eriophyllum lanatum var. integrifolium George K. Helmkamp, E. A. Helmkamp 1997-9-9 2312 Alpine Sierra Nevada Mountains, Leviathan Lookout Road at the S and W sides of Leviathan Peak, NW of Monitor Pass 2683 Comment
  UCR189146  Eriophyllum lanatum var. integrifolium George K. Helmkamp, E. A. Helmkamp 2007-7-17 12556 Alpine Northern Sierra Nevada Mountains, Blue Lake Road about nine miles south of its junction with CA-88 2511 Comment
  UCR129520  Eriophyllum pringlei George K. Helmkamp, E. A. Helmkamp 1998-5-20 4015 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
  UCR118353  Eriophyllum staechadifolium George K. Helmkamp, E. A. Helmkamp 2000-9-1 5956 San Luis Obispo Los Osos, c. 0.5 miles NW of Hazard Cyn., between Howard St. and sand dunes 6 Comment
  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
  UCR233123A  Erodium botrys George K. Helmkamp, E. A. Helmkamp 2011-5-21 17328 Calaveras Northern Sierra Nevada Mountains Foothills, Ridge Road, 1.9 rd. miles southeast of CA-26, 1.8 air mi. southeast (130 deg. ) of Glencoe 863 Comment
  UCR140133  Erodium moschatum George K. Helmkamp 2004-2-19 8299 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park, along Mesa View Dr (Calif. Hwy 1), 0.2 mi south of the jct with Halcyon Rd. 61 Comment
  UCR191094  Erysimum capitatum var. capitatum George K. Helmkamp, E. A. Helmkamp 2007-6-12 12329 Placer Northern Sierra Nevada Mountains, Lake Spaulding Road just north of its junction with Hwy CA-20 1610 Comment
  UCR206782  Erysimum capitatum var. capitatum George K. Helmkamp, E. A. Helmkamp 2009-7-16 15214 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
  SD247377  Erysimum capitatum var. perenne George K. Helmkamp, E. A. Helmkamp 2012-6-19 19249 Placer Northern Sierra Nevada Mountains: Robinson's Flat, 27 miles east of Forest Hill at the end of Forest Hill Road. 2040 Comment
  UCR209742  Erysimum perenne George K. Helmkamp, E. A. Helmkamp 2009-8-12 15438 Placer Sierra Nevada Mountains, Forest Hill Road, 0.8 mile west of Robinson Flat, c. 27 miles NE of the city of Foresthill 2034 Comment
  SD247506  Erythranthe cardinalis George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-2 22071 Amador Northern Sierra Nevada Mountains Foothills: SE of Pioneer along CA-26, north side of North Fork Mokelumne River (Weset Point 7.5'Q) 627 Comment
  CAS-BOT-BC248287  Erythranthe guttata George K. Helmkamp; E. A. Helmkamp 2011-10-13 18417 El Dorado Northern Sierra Nevada Mountains: Foothills: Forebay Road, 8.1 miles northwest of Pollock Pines, at north side of bridge over the South Fork American River 596 Comment
  UCR15496  Erythranthe rubella George K. Helmkamp, E. A. Helmkamp 1978-5-29 s.n. Mono Along the East Walker River 1 mile from the Nevada border, [off Hwy 182] 1825 Comment
  SEINET9261998  Eschscholzia caespitosa George K. Helmkamp 2013-1 20176 Calaveras Central Sierra Nevada Foothills: ALong the north side of CA-26 just east of the west junction with Lime Creek Road (Valley Springs 7.5 Q) 223 Comment
  UCR104967  Eschscholzia caespitosa George K. Helmkamp 1997-6-20 2052 San Luis Obispo Central Coast, Los Osos, c. 0.2 mi. NE of Buckskin & Martingale 27 Comment
  UCR197316  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2008-3-22 13211 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
  UCR247466  Eschscholzia caespitosa George K. Helmkamp, E. A. Helmkamp 2007-3-25 11709 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
  UCR161685  Eschscholzia californica George K. Helmkamp, E. A. Helmkamp 2005-2-24 8964 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
  UCR122958  Eschscholzia glyptosperma George K. Helmkamp, E. A. Helmkamp 2001-3-30 6425 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 Comment
  SD241118  Eschscholzia lobbii George K. Helmkamp, E. A. Helmkamp 2011-4-10 17163 Yuba Sacramento Valley: along Camp Beale Highway/Spenceville Road, c. 1.75 miles northeast of Wheatland (Wheatland 7.5'Q) 43 Comment
  SD143752  Eschscholzia minutiflora G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2878 Imperial 4.7 miles north of Winterhaven on Picacho Road and 1.0 mile northwest of the All-American Canal. 75 Comment
  UCR104810  Eschscholzia parishii George K. Helmkamp, E. A. Helmkamp 1998-2-18 2735 Riverside Sonoran (Colorado) Desert, Chuckwalla Mtns, 10.6 miles SSW of Chuckwalla Valley Rd. on Graham Pass Rd. 488 Comment
  SD247306  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2007-8-16 12755 Amador Northern Sierra Nevada Mountains: along CA-88, 3.5 miles south of its junction with Morman Emigrant Trail. 2146 Comment
  SEINET4137624 Image available Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2010-9-1 16914 Amador Northern Sierra Nevada Mountains; Dufrene Road, 0.7 miles E of junction with CA-88 north of Lower Bear River Reservoir Comment
  UC1950985  Eucephalus breweri G. K. Helmkamp, E. A. Helmkamp 2005-9-23 9919 El Dorado Northern Sierra Nevada Foothills: Wright's Lake Road (Forest Road 4) ca. 4.0 road mi N of US-50 (NE of Kyburz) Pyramid Peak 7.5' Quad. Comment
  UCR178742  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2006-8-30 11294 Alpine Northern Sierra Nevada Mountains, Woods Lake, south of Calif. Hwy 88 and generally SE of Caples Lake 2521 Comment
  UCR205981  Eucephalus breweri George K. Helmkamp, Mary Alice Barnes, Amy Barnes 2008-7-28 13913 El Dorado Northern Sierra Nevada Mountains, Wrights Lake Road, 3.4 miles north of its junction with CA Hwy 50 2043 Comment
  UCR229556  Eucephalus breweri George K. Helmkamp, E. A. Helmkamp 2011-7-26 17901 Placer Northern Sierra Nevada Mountains, Bowman Lake Road, 0.9 mile north of its junction with CA Hwy 20, 0.85 mi. NE (23 deg. ) of Emigrant Gap and N of I-80 1434 Comment
  UCR61713  Eucrypta chrysanthemifolia 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
  UCR161926  Eucrypta chrysanthemifolia var. chrysanthemifolia George K. Helmkamp, E. A. Helmkamp 2005-3-1 9003 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
  CLARK-A1045-252  Eucrypta micrantha George K. Helmkamp 1978-3-14 San Bernardino Cady Mountains rocky slope along dry wash; east end of Cady Mountains; Cady Mt. 15'Q Comment
  CLARK-A1045-771  Euphorbia albomarginata 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
  CLARK-A1045-1280  Euphorbia arizonica 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
  SEINET11261856  Euphorbia crenulata George Helmkamp, E. A. Helmkamp 2012-5-11 18943 Placer Northern Sierra Nevada Mountains Foothills: Finning Mill Road, 1.2 miles N of its junction with Forest Hill Road (Foresthill 7.5' Q.); 0 1104 Comment
  UCR235502  Euphorbia crenulata George K. Helmkamp, E. A. Helmkamp 2012-5-11 18943 Placer Northern Sierra Nevada Mountains Foothills, Finning Mill Road, 1.2 miles north of its junction with Forest Hill Road 1104 Comment
  UCR100881  Euphorbia eriantha George K. Helmkamp, E. A. Helmkamp 1998-2-18 2691 Riverside Sonoran (Colorado) Desert, Midland Road., 3.8 mi. SE of Midland, Little Maria Mtns. 198 Comment
  UCR115802  Euphorbia maculata George K. Helmkamp, E. A. Helmkamp 2000-10-17 6224 San Diego Peninsular Range, Lawrence Welk Commercial Complex, c. 1.5 miles west of the Oat Hills, and south of Moosa Canyon 299 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
  UCD142629  Euphorbia nutans G. K. Helmkamp; E. A. Helmkamp 2007-9-22 12991 El Dorado Northern Sierra Nevada Mountains; along Pleasant Valley Road (Hwy CA-49) 0.8 mile west of its junction with Missouri Flat Road in Diamond Springs. 531 Comment
  UCD142630  Euphorbia nutans G. K. Helmkamp; E. A. Helmkamp 2006-10-18 11532 El Dorado Northern Sierra Nevada Mountains; Diamond Springs; village along Hwy CA-49 south of Placerville. 539 Comment
  UCR179809  Euphorbia nutans George K. Helmkamp, E. A. Helmkamp 2006-10-18 11532 El Dorado Northern Sierra Nevada Mountains Foothills, Diamond Springs; village along Calif. Hwy 49 south of Placerville 540 Comment
  UCR200880  Euphorbia nutans George K. Helmkamp, E. A. Helmkamp 2008-9-16 14121 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park 530 Comment
  UCR209766  Euphorbia nutans George K. Helmkamp, E. A. Helmkamp 2009-8-14 15465 El Dorado Sierra Nevada Mountains Foothills, junction of Sand Ridge Road and Cutaway Lane, 2.0 miles west of Bucks Bar Road 642 Comment
  SD240986  Euphorbia oblongata George K. Helmkamp, E. A. Helmkamp 2011-6-17 17564 Calaveras Northern Sierra Nevada Mountains Foothills: Winton Road, 0.8 mil northeast of CA-26 at West Point (West Point 7.5'Q) 977 Comment
  UCR206296  Euphorbia peplus George K. Helmkamp, E. A. Helmkamp 2009-5-29 14871 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  UCR89557  Euphorbia polycarpa George K. Helmkamp 1994-3-10 42- 4 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
  CLARK-A1045-1315  Euphorbia serpyllifolia subsp. hirtula George K. Helmkamp 1977-9-23 San Diego along Camino Ruiz two blocks south of Mira Mesa boulevard, a roadside weed; Del Mar 7.5'Q Comment
  UCR45848  Euphorbia setiloba George K. Helmkamp 1986-9-27 s.n. San Bernardino Eastern Mojave Desert., 0.5 mi south of Granite Pass along Kelbaker Road, c. 14 mi south of Kelso 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
  SEINET3245945  Euthamia occidentalis G. K. Helmkamp, E. A. Helmkamp 2009-1 15673 El Dorado Sierra Nevada Mountains Foothills: Lake Oaks Mobile Home Park, Patterson Dr. and CA-49 in Diamond Springs (Placerville 7.5') 520 Comment
  UCR253794  Euthamia occidentalis George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20069 San Joaquin San Joaquin Valley, Rock Creek, at East Sonora Road, 1.3 miles southeast of CA-4 50 Comment
  CAS-BOT-BC167344  Fagonia laevis G. K. Helmkamp; E. Helmkamp 1998-1-24 2597 Imperial 4.2 mi. N of Winterhaven on Picacho Rd, where the road crosses the canal 91 Comment
  UCR103356  Fagonia laevis George K. Helmkamp, E. Helmkamp 1998-1-24 2597 Imperial Sonoran (Colorado) Desert, 4.2 mi. north of Winterhaven on Picacho Rd, where the road crosses the canal. 91 Comment
  UCR104005  Fagonia laevis George K. Helmkamp, E. A. Helmkamp 1998-2-5 2657 Riverside Sonoran (Colorado) Desert, Indio Hills, 3 mi. east of Thousand Palms & 1.1 mi. N on Amity Rd. 101 Comment
  HSC79229  Festuca arundinacea G. K. Helmkamp 1984-4-29 - 54 San Bernardino Big Morongo Preserve in Big Morongo Canyon, S of town of Morongo Valley. Comment
  OBI37300  Festuca arundinacea G. Helmkamp 1985-4-30 445 San Bernardino Morongo Cyn. SE of Morongo Valley 762 Comment
  SD244054  Festuca arundinacea George K. Helmkamp, E. A. Helmkamp 2012-7-6 19367 El Dorado Northern Sierra Nevada Mountains: Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50. 2078 Comment
  UCR241741  Festuca arundinacea George K. Helmkamp, E. A. Helmkamp 2012-7-6 19367 El Dorado Northern Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50 2078 Comment
  SD178095  Festuca bromoides G. K. Helmkamp 2004-2-29 8321 San Luis Obispo Central Coast: Nipomo Mesa, Nipomo, Orchard Ave. 0.1 mile northwest of Division St. 116 Comment
  SD239531  Festuca bromoides George K Helmkamp, E. A. Helmkamp 2012-4-4 18692 Calaveras Northern San Joaquin Valley: along CA-26, 0.1 mile west of its junction with Milton road, between Linden and Valley Springs (Valley Springs SW 7.5'Q) 67 Comment
  UCR161227  Festuca dertonensis George K. Helmkamp, E. A. Helmkamp 2005-3-5 9038 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
  UCR209520  Festuca dertonensis George K. Helmkamp, E. A. Helmkamp 2008-6-9 13629 B 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
  UCR258223  Festuca dertonensis George K. Helmkamp, Amy Barnes 2013-3-28 20252 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  SEINET13262896 Image available Festuca microstachys var. microstachys George K. Helmkamp 2014-1 22934 Calaveras along Winton Road along the north side of Wilson Lake 1128 Comment
  SEINET3821915 Image available Festuca myuros George K. Helmkamp, E. A. Helmkamp 2010-4-7 15833 San Joaquin Northeast San Joaquin Valley, Collier Road, 0.1 mile west of its junction with CA-88, 1.83 mi NE (27 degrees) of Clements 7.5' Q) 47 Comment
  UCR187073  Festuca myuros George K. Helmkamp, E. A. Helmkamp 2007-5-6 11942 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Diamond Springs 524 Comment
  UCR232260  Festuca myuros George K. Helmkamp, E. A. Helmkamp 2011-3-12 17076 San Joaquin Upper San Joaquin Valley, Buena Vista Road, 0.1 mile east of its junction with CA-88 67 Comment
  UCR207843  Festuca myuros var. hirsuta George K. Helmkamp, E. A. Helmkamp 2009-3-26 14463 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  UCR253478  Festuca myuros var. hirsuta George K. Helmkamp 2014-4-5 22689 Amador Eastern edge of San Joaquin Valley/lower Sierra Nevada Foothills, Sutter Creek along West Marlette Street, 0.1 mile east of Dave Brubeck Road, west end of city of Ione 85 Comment
  SEINET13262630 Image available Festuca perennis George K. Helmkamp, Mary Alice Barnes 2013-1 20626 Calaveras Poloma Road at its junction with Cosgrove Creek Road, 3 miles NE (30 deg. ) of Valley Springs 279 Comment
  UCR173360  Festuca perennis George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10387 Nevada Northern Sierra Nevada Mtns., Cedarsong Road, 0.1 mi. NE of Calif. Hwy 49 (NW of Nevada City) 637 Comment
  UCR250261  Festuca perennis George K. Helmkamp, Elizabeth Helmkamp 2013-4-13 20332 Nevada Northern Sierra Nevada Mountains Foothills, Wolf Road, 1.6 miles northwest of its junction with CA-49 405 Comment
  UCR253257  Festuca perennis George K. Helmkamp, Amy Barnes 2014-4-7 22725 Sacramento Sacramento Valley, Clay East Road, 1 mile east of its junction with CA-104 52 Comment
  UCD65780  Festuca trachyphylla G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10585 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road just north of Hwy US-50. 1664 Comment
  RSA0094838  Filago gallica George K. Helmkamp, Amy Barnes 2014-5-8 22865 El Dorado Sierra Nevada Mountains Foothills. along CA-49 near Ramales Lane, c. 0.7 mile north of Union Mine Road junction. 282 Comment
  UCR256510  Filago gallica George K. Helmkamp, Amy Barnes 2014-5-8 22865 El Dorado Sierra Nevada Mountains Foothills, along CA-49 near Ramales Lane, c. 0.7 mile north of Union Mine Road junction 282 Comment
  SEINET3245640  Foeniculum vulgare G. K. Helmkamp, E. A. Helmkamp 2008-1 14304 Amador Northern Sierra Nevada Mountains Foothills: junction of CA-49 and Fiddletown Road at the north end, but within the city limits of Plymouth 311 Comment
  UCR121516  Fragaria vesca George K. Helmkamp, E. A. Helmkamp 2000-6-19 5788 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 Comment
  SBBG128988  Fragaria vesca G. K. Helmkamp, E. A. Helmkamp 2011-7-7 17649 El Dorado Capps Crossing (Bonnetti) Rd, 2.8 mi S of its jct with Mormon Emigrant Trail 1297 Comment
  UCD113129  Frangula rubra G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12068 Placer Nothern Sierra Nevada Mountains; Sugar Pine Road, 0.2 mile northwest of Forest Hill Road. 1360 Comment
  UCR118343  Frankenia salina George K. Helmkamp, E. A. Helmkamp 2000-9-1 5953 San Luis Obispo Los Osos, c. 0.5 miles NW of Hazard Cyn., between Howard St. and sand dunes 6 Comment
  UCR233650  Fraxinus latifolia George K. Helmkamp, E. A. Helmkamp 2011-7-17 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 deg. ) of Peardale 686 Comment
  UCR130662  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 south of Japatul Valley Rd & c. 6 mi airline SSW of junction of Calif. Hwy 79 & I-8 716 Comment
  UCR176279  Fritillaria George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10448 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along an unnamed road to Lake Clementine, 1.2 mi. N of Forest Hill Road 422 Comment
  UCR235390  Fritillaria atropurpurea George K. Helmkamp, E. A. Helmkamp 2012-5-11 18952 Placer Northern Sierra Nevada Mountains Foothills, Finning Mill Road, 1.7 miles north of its junction with Forest Hill Road 1041 Comment
  UCD121685  Galium aparine G. K. Helmkamp; E. A. Helmkamp 2007-3-10 11601 El Dorado Northern Sierra Nevada Mountains Foothills: Rattlesnake Bar Rd, 3.0 miles southwest of CA-49, SW of Pilot Hill. 390 Comment
  UCD121689  Galium aparine G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11801 Amador Northern Sierra Nevada Mountains: junction of Tonzi Road and CA-124 about 7 miles north of Ione. 229 Comment
  UCD121691  Galium aparine G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11832 Calaveras Northern Sierra Nevada Mountains: along CA-49, 1 mile west of Mokelumne Hill, 1.7 miles south of the Amador County line. 370 Comment
  UCR218143  Galium aparine George K. Helmkamp, Amy Barnes 2010-5-7 16003 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  UCR249570  Galium aparine George K. Helmkamp, Elizabeth Helmkamp 2013-6-15 20855 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 mile south of its junction with US-50 in Kyburz 1364 Comment
  SD146164  Galium bifolium G. K. Helmkamp, E. A. Helmkamp, A. Kerchner 1999-6-29 5021 A Placer Northern Sierra Nevada Range: N of Hwy I-80 at west exit to Donner Lake; opening to Negro Canyon 2134 Comment
  UCR249552  Galium bifolium George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20948 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
  SBBG128976  Galium bolanderi G. K. Helmkamp, E. A. Helmkamp 236-Aug-2010 16864 Nevada Eagle Lakes Rd, ca. 0.5 mi W of its jct with Carlyle Rd, 5.8 mi NE (66 deg) of Emigrant Gap, N of I-80 1655 Comment
  UCR123146  Galium californicum subsp. californicum George K. Helmkamp, E. A. Helmkamp 2001-6-2 6778 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
  CAS-BOT-BC217440  Galium californicum subsp. luciense G. K. Helmkamp; E. A. Helmkamp 1999-5-21 4862 Monterey Willow Crk. Rd., 6.3 mi. E of CA-1 N of Gorda, Santa Lucia Mtns. 1036 Comment
  VVC463  Galium parishii G. K. Helmkamp 1995-10-28 1 -5 San Bernardino San Bernardino Mtns, Arrastre Cteek 1/2 mile NE of CA 38 on Round Valley Rd (2N01), 6.5 mi SE of Big Bear City 2439 Comment
  UCR106717  Galium parisiense George K. Helmkamp, E. A. Helmkamp 1998-5-13 3581 Tulare Sierra Nevada Foothills, 11.5 mi east of Fountain Springs along Hot Springs Road 808 Comment
  UCR107343  Galium parisiense George K. Helmkamp, E. A. Helmkamp 1998-5-14 3632 Fresno Coast Range, Warthan Creek Canyon, along Calif. Hwy 198, 27.6 mi. west of Interstate 5, west of Coalinga 457 Comment
  RSA756919  Galium porrigens var. porrigens George K. Helmkamp, E. A. Helmkamp 2009-5-14 14696 El Dorado hiking trail starting north of CA-49, 3.5 miles north of CA-50 in Placerville 511 Comment
  UCR161801  Galium porrigens var. porrigens George K. Helmkamp, E. A. Helmkamp 2005-3-14 9147 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  UCR130985  Galium stellatum var. eremicum George K. Helmkamp, E. A. Helmkamp 1998-5-3 3520 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  UCR237277  Galium trifidum var. pacificum George K. Helmkamp, E. A. Helmkamp 2012-7-2 19299 Amador Northern Sierra Nevada Mountains, Bear River Road at the south end of the dam of Lower Bear River Reservoir 1774 Comment
  UCD121951  Galium triflorum G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12758 Amador Northern Sierra Nevada Mountains: along the south side of Bear River Reservoir just east of the spillway. 1777 Comment
  UCR232630  Galium triflorum George K. Helmkamp, E. A. Helmkamp 2011-9-1 18192 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz 1280 Comment
  UCR237376  Galium triflorum George K. Helmkamp, E. A. Helmkamp 2012-6-13 19171 Nevada Northern Sierra Nevada Mountains Foothills, Washington Road, 3.6 miles north of its junction with CA-20 1006 Comment
  UCR123156  Gamochaeta ustulata George K. Helmkamp, E. A. Helmkamp 2002-4-16 7411 San Luis Obispo Central Coast, Park Ridge 0.5 mi east of Morro Bay near Turri Road 76 Comment
  UCR160290  Gamochaeta ustulata George K. Helmkamp 2004-5-1 8556 San Luis Obispo Central Coast, south of Arroyo Grande along Calif. Hwy 1, south of Callender Rd beside Conoco-Phillips refinery 30 Comment
  SD247466  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2013-6-19 20931 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, north side of its junction with Mormon Emigrant Trail. 2188 Comment
  UCD103622  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11040 El Dorado Northern Sierra Nevada Mountains. 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd. 2226 Comment
  UCD103674  Gayophytum diffusum subsp. parviflorum G. K. Helmkamp; E. A. Helmkamp 2007-8-9 12734 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, 1.4 miles south of the lake. 2101 Comment
  UCR176744  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2006-7-12 10950 El Dorado Northern Sierra Nevada Mtns, Mount Ralston Trail and Hwy US-50, about 0.9 mile south of Twin Bridges 1960 Comment
  UCR188473  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2007-7-17 12520 Amador Northern Sierra Nevada Mountains, along CA-88 at Martin Meadow, 2.2 miles north of Silver Lake 2317 Comment
  UCR206776  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Amy Barnes 2009-7-8 15137 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 0.4 mile east of its junction with Ice House Road, about 1.3 miles north of Ice House 1654 Comment
  UCR207113  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2009-7-16 15216 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
  UCR233148B  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, E. A. Helmkamp 2011-7-12 17724 Calaveras Northern Sierra Nevada Mountains, Winton Road (Forest Route 7N03), 12.6 miles east of its junction with CA-26 in West Point 1503 Comment
  UCR253543  Gayophytum diffusum subsp. parviflorum George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 20957 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 0.6 mile south of its junction with Hwy CA-88 1633 Comment
  CAS-BOT-BC227274  Gayophytum heterozygum George K. Helmkamp; E. A. Helmkamp 2011-7-19 17808 Tuolumne Northern Sierra Nevada Mountains Foothills: Forest Route 5N14, 1.7 mile southeast of Boards Crossing bridge of North Fork Stanislaus River 1143 Comment
  UCR232618  Gayophytum heterozygum George K. Helmkamp, E. A. Helmkamp 2011-9-30 18367 Nevada Northern Sierra Nevada Mountains, small, open flat along CA-20, 2.6 miles west of its junction with Lowell Hill Road 1581 Comment
  CLARK-A1045-1162  Gayophytum nuttallii George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 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-A1045-59  Geranium carolinianum George K. Helmkamp 1929-4-27 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  SD243151  Geranium carolinianum George K. Helmkamp, E. A. Helmkamp 2011-3-12 17074 San Joaquin Upper San Joaquin Valley: between Lodi and Galt, Forest Lake Road just west of CA-99. Weedy roadside flat. 27 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
  SEINET13203107 Image available Geranium dissectum George K. Helmkamp, Elizabeth Helmkamp 2013-1 20446 El Dorado Sierra Nevada Mountains Foothills: Camp Creek along Happy Valley Cutoff Road, 0.6 mile east of junction with Mt. Aukum Road, 1.35 air miles NE (62 deg. ) of Somerset (Camino 7.5' Q.) 565 Comment
  SEINET13203137 Image available Geranium dissectum George K. Helmkamp 2014-1 22750 Nevada Sierra Nevada Mountains Foothills: 8 miles west of Grass Valley, Penn Valley Drive, 0.2 mile southeast of its junction with CA-120 (Rough & Ready 7.5' Q.) 437 Comment
  UCR185225  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2007-4-23 11794 Amador Foothills, Northern Sierra Nevada Mountains, along Calif. Hwy 124, 0.25 mile from its junction with Hwy 16 252 Comment
  UCR242584  Geranium dissectum George K. Helmkamp, E. A. Helmkamp 2011-6-17 17609 Amador Northern Sierra Nevada Mountains Foothills, junction of CA-26 and Joyce Road, northwest of the Hwy 26 bridge over North Fork Mokelumne River, 0.78 mi. SSW (187 deg. ) of Pioneer 762 Comment
  SD243152  Geranium molle George K. Helmkamp, E. A. Helmkamap 2011-4-10 17135 Placer Sacramento Valley: east of Sheridan just north of the junction of North Kilaga Springs Road and Kilaga Springs Road. 98 Comment
  SEINET11261853  Geranium molle George Helmkamp, E. A. Helmkamp 2012-5-15 18979 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
  UCD103416  Geranium molle G. K. Helmkamp; Elizabeth Helmkamp 2006-4-20 10202 El Dorado Northern Sierra Nevada Foothills: Between N and Middle forks of Cosumnes River; Junction of Sand Ridge Road and Cutaway Lane, 2.1 mi SW of Somerset. 665 Comment
  UCD103426  Geranium molle G. K. Helmkamp; E. A. Helmkamp 2007-4-23 11804 Amador Northern Sierra Nevada Mountains; junction of Tonzi Road and CA-124 about 7 miles north of Ione. 229 Comment
  UCR160581  Geranium molle George K. Helmkamp, E. A. Helmkamp 2005-6-9 9586 San Luis Obispo Central Coast Ranges, Arroyo Grande to Huasna Road along Arroyo Seco Creek, 8.3 miles northeast of Huasna Townsite Road 332 Comment
  UCR197537  Geranium molle George K. Helmkamp, E. A. Helmkamp 2008-3-22 13237 Calaveras Sierra Nevada Mountains Foothills, along Mokelumne Vista Road at the junction with CA-49, just west of Mokelumne Hill village 479 Comment
  UC2015622  Geum triflorum G. Helmkamp 1995-9-23 3 -3 Alpine West side of Sonora Pass just beyond the Mono County line. 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
  UCR162743  Gilia achilleifolia subsp. achilleifolia George K. Helmkamp 2004-4-23 8510 Santa Barbara San Rafael Mountains, Figueroa Mountain, VABM lookout tower north of Figueroa Mountain Rd. 1372 Comment
  RSA627297  Gilia angelensis George K. Helmkamp 1998-4-3 3083 Riverside West Palm Springs Village area, vic. of Hwy I-10 & Verbenia Ave.; 4 mi. N of Tamarack Rd on Cottonwood Rd. 1280 Comment
  UCR116010  Gilia angelensis George K. Helmkamp, E. A. Helmkamp 1997-3-5 1335 Riverside San Bernardino Mtns./San Gorgonio Pass, Cabazon, 0.5 mi north of I-10 on Millard Pass Rd. 564 Comment
  RSA0013371  Gilia capitata George K. Helmkamp, E. A. Helmkamp 2010-9-1 16883 Amador Northern Sierra Nevada Mountains: along CA-88, 2.6 miles southwest of its junction with Mormon Emigrant Trail, e. 2.75 mi NNW of Upper Bear River Reservoir. 2162 Comment
  UCR130051  Gilia capitata subsp. abrotanifolia George K. Helmkamp, E. A. Helmkamp 1998-5-21 4047 Los Angeles Western Mojave Desert/Transverse Range, junction of Munz Ranch Rd and Lake Elizabeth Rd., north of Lake Elizabeth 1006 Comment
  RSA0115716  Gilia capitata subsp. mediomontana George K. Helmkamp, Elizabeth Helmkamp 2013-5-2 20452 El Dorado Sierra Nevada Mountains Foothill: Happy Valley Road, 0.6 mile east of its junction with Mt. Aukum Road, 1.65 air miles NE (72 deg ) of Somerset. 665 Comment
  SD244198  Gilia capitata subsp. mediomontana George K. Helmkamp, E. A. Helmkamp 2012-6-26 19272 Amador Northern Sierra Nevada Mountain: Panther Creek Road, 0.9 mile south of its junction with CA-88, S of Hwy 88/Carson Pass Hwy and W of Lower Bear Reservoir (Peddler Hill 7.5'Q) 1616 Comment
  UCR173797  Gilia capitata subsp. mediomontana George K. Helmkamp, Elizabeth A. Helmkamp 2006-5-31 10592 El Dorado Northern Sierra Nevada foothills, along Hwy US-50, 0.6 mile east of White Hall 1055 Comment
  UCR173812  Gilia capitata subsp. mediomontana George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-4 10631 El Dorado Northern Sierra Nevada foothills, Rock Creek Road, about 2.2 miles east of its junction with Calif. Hwy 193 424 Comment
  UCR193400  Gilia capitata subsp. mediomontana George K. Helmkamp, E. A. Helmkamp 2007-5-30 12199 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
  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-A1045-671  Gilia latifolia George K. Helmkamp 1977-4-23 Inyo 15 miles north of Trona; roadside along Trona Road Comment
  UCR233119B  Gilia leptalea George K. Helmkamp, E. A. Helmkamp 2011-8-6 17990 A Amador Northern Sierra Nevada Mountains, Ellis Road, 0.2 miles south of its junction with CA-88 2009 Comment
  RSA0012081  Gilia leptalea subsp. bicolor George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18091 Alpine 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
  SEINET11261734  Gilia leptalea subsp. bicolor George Helmkamp, Ann Kerchner; Amy Barnes 2011-8-13 18091 Alpine Northern Sierra Nevada Mountains: unnamed dirt roadon the east side of CA-4 and about .1 mile northeast of the Calaveras Co. line, near Bear Valley (Tamarack 7.5' Q.); 0 2165 Comment
  SEINET11267715  Gilia leptalea subsp. bicolor George Helmkamp, Elizabeth Helmkamp 2013-8-2 22092 Alpine Northern Sierra Nevada Mountains: along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam (Caples Lake 7.5' Q.); 0 2486 Comment
  UCD106141  Gilia leptalea subsp. leptalea G. K. Helmkamp; E. A. Helmkamp 2007-8-1 12664 Nevada Northern Sierra Nevada Mountains: near Camp Spaulding; along Lake Spaulding Road 0.4 mile north of its junction with CA-20. 1573 Comment
  UCR207153  Gilia leptalea subsp. leptalea George K. Helmkamp, E. A. Helmkamp 2009-7-22 15267 El Dorado Sierra Nevada Mountains, Wrights Lake Road, 1.2 miles south of Wrights Lake 2073 Comment
  UCR229567  Gilia leptalea subsp. leptalea George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18053 Calaveras Northern Sierra Nevada Mountains, Black Springs Road [Forest Route 7N23], 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR101071  Gilia malior George K. Helmkamp, E. A. Helmkamp 1998-4-9 3286 Kern W end of city of Mojave, along Airport Blvd. 808 Comment
  RSA614659  Gilia sinuata George K. Helmkamp 1993-4-24 s.n. San Bernardino Creasote scrub between Kelbaker Road and the Granite Mountains, 5.1 miles NE of US-40. 1220 Comment
  UCR26124  Gilia splendens George K. Helmkamp 1982-5-23 s.n. San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, Big Morongo Canyon. Roadside bank about 0.25 mi. below the entrance to the Nature Conservancy Preserve, where the canyon begins Comment
  UCR15613  Glebionis segetum George K. Helmkamp 1978-6-3 s.n. San Luis Obispo Central Coast, roadside in Morro Bay Comment
  UCR106439  Glehnia littoralis subsp. leiocarpa George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2164 Mendocino North Coast, Glass Beach, Fort Bragg 6 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
  UCR190313  Glyceria elata George 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
  CLARK-A1045-874  Gnaphalium bicolor George K. Helmkamp 1977-3-5 Riverside Santa Ana Mountains along Riverside-San Diego County Line at start of Interstate Highway 215; ; southern oak woodland; Temecula 7.5'Q Comment
  UCR140147  Gnaphalium californicum George K. Helmkamp 2004-2-11 8279 San Luis Obispo Central Coast, Nipomo Mesa, Pomeroy Rd, 0.2 mi north of Willow Rd. 130 Comment
  UCR158185  Gnaphalium californicum George K. Helmkamp 2004-6-12 8624 Santa Barbara Central Coast Range, Purissima Hills. Harris Grade Rd at '28.04 mi', about 3 mi south of CA Hwy 135 229 Comment
  UCR219640  Gnaphalium canescens subsp. beneolens George K. Helmkamp, E. A. Helmkamp 2009-10-9 15667 El Dorado Sierra Nevada Mountains Foothills, along Snows Road, 0.9 mile south of Carson Road in Camino. 0.3 mi. south of Hwy 50 933 Comment
  UCR176016  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2006-7-28 11031 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  UCR200906  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2008-8-30 14061 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
  UCR234188  Gnaphalium canescens subsp. thermale George K. Helmkamp, E. A. Helmkamp 2010-9-23 16957 El Dorado Northern Sierra Nevada Mountains, Forest Route 31, 3.4 miles north of its junction with Peavine Ridge Road and Round Tent Canyon Road 1463 Comment
  UCR259869  Gnaphalium luteoalbum George K. Helmkamp, Elizabeth Helmkamp 2013-11-2 22467 Placer Sacramento Valley, West Wise Road just east of the junction with California Lane, north of Lincoln 56 Comment
  SD243090  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2011-9-24 18334 El Dorado Northern Sierra Nevada Mountains: Wentworth Springs Road at the junction with South Creek Road, 4.0 miles north of the Wentworth Springs /Loon Lake junction (Robbs Peak 7.5'Q) 1750 Comment
  UCD132411  Gnaphalium palustre G. K. Helmkamp; E. A. Helmkamp 2007-7-27 12612 Nevada Northern Sierra Nevada Mountains: Bowman Lake Road, 11.2 miles north of its junction with CA-20. 1793 Comment
  UCR188861  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2007-7-27 12612 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 11.2 miles north of its junction with CA-20 1793 Comment
  UCR207007  Gnaphalium palustre George K. Helmkamp, Amy Barnes 2009-7-8 15166 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
  UCR233318  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2011-9-1 18223 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  UCR233373  Gnaphalium palustre George K. Helmkamp, E. A. Helmkamp 2011-9-16 18284 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
  UCR122355  Gnaphalium stramineum George K. Helmkamp, E. A. Helmkamp 2001-7-8 7010 Humboldt North Coast, north spit of Samoa Peninsula, 0.5 mi north of CA Hwy 255 bridge over Humboldt Bay 6 Comment
  UCR169944  Gnaphalium stramineum George K. Helmkamp, E. A. Helmkamp 2004-6-20 08683 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Sudden Rd west of Sudden Peak and 1.2 mi SW of Miquelito Rd (SW of Lompoc) 412 Comment
  UCR179359  Gnaphalium stramineum George K. Helmkamp, E. A. Helmkamp 2006-9-20 11419 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Ice House Road [at Riverton] and US-50 east of Pacific 1000 Comment
  UCR248421  Grindelia camporum var. camporum George K. Helmkamp, Elizabeth Helmkamp 2013-9-13 22292 Amador Northern Sierra Nevada Mountains Foothills, Volcano Road; 0.1 mile northwest of the village of Volcano 671 Comment
  UC2044599  Grindelia hirsutula George K. Helmkamp with Elizabeth Helmkamp 2013-9-13 22292 Amador Northern Sierra Nevada Mountains Foothills Volcano Road; 0.1 mile northwest of the village of Volcano. (Tragedy Spring 7.5' Q.) Comment
  SEINET5586210  Grindelia hirsutula var. davyi George K. Helmkamp, Elizabeth Helmkamp 2013-1 22180 Alpine Northern Sierra Nevada Mountains: along Ca-89, 0.1 mile east of its junction with CA-4, Monitor Creek. 1747 Comment
  UCR190580  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2007-9-2 12883 El Dorado Northern Sierra Nevada Mountains Foothills, Grizzly Flat road 10.4 miles ESE of Somerset. 1107 Comment
  UCR194702  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2007-5-30 12207 Placer Northern Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.5 miles east of its junction with Forest Hill Road in Foresthill 488 Comment
  UCR233149B  Grindelia hirsutula var. davyi George K. Helmkamp, E. A. Helmkamp 2011-7-12 17715 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  UCR249616  Grindelia hirsutula var. davyi George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20839 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim's Road, 0.1 mile northwest of its junction with Spring Garden Road 738 Comment
  UCR258552  Grindelia hirsutula var. davyi George K. Helmkamp, Amy Barnes 2014-8-27 23027 Alpine Northern Sierra Nevada Mountains, West Fork Carson River canyon, along highway CA-88/Carson Pass Hwy, 2.6 miles east of the junction with Hwy 89/Luther Pass Rd. 1994 Comment
  RSA613939  Guillenia lasiophylla George K. Helmkamp, E. A. Helmkamp 1997-3-8 1404 San Luis Obispo Carrizo Plain. 30.1 mi. NW of CA-166 on Soda Lake Rd; at San Diego Crk Rd and edge of Soda Lake. 701 Comment
  UCR237272  Hackelia floribunda George K. Helmkamp, E. A. Helmkamp 2012-7-14 19394 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  UCR237559  Hackelia mundula George K. Helmkamp, E. A. Helmkamp 2012-7-2 19294 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 2.9 miles west of its junction with CA-88 2271 Comment
  CLARK-A1045-1233  Haplopappus acaulis George K. Helmkamp 1978-5-30 Mono Sierra Nevada 2 miles north of Conway Summit, west of US Highway 395; ; Lundy 7.5'Q 2316 Comment
  CLARK-A1045-35  Haplopappus cooperi George K. Helmkamp 1977-4-24 San Bernardino Red Mountain 7 miles north on Trona Road; Creosote Bush scrub; Klinker Mt. 7.5'Q Comment
  UCR18616  Haplopappus squarrosus George K. Helmkamp 1974-9-28 s.n. San Luis Obispo Central Coast, Morro Bay area, Hazard Cyn, near ocean 34 Comment
  CLARK-A1045-846  Hedeoma nana subsp. californica George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  SD234814  Helianthella californica G. K. Helmkamp, E. A. Helmkamp 2008-6-23 13736 Amador Northern Sierra Nevada Mountains: Dufrene Road, 1.1 miles south of its junction with CA-88 (jct is between Mormon Emigrant Trail and Bear River Reservoir Road), c. 2 mile (air) north of the west end of Lower Bear River Reservoir (Peddler Hill 7.5'Q) 2054 Comment
  RSA518564  Helianthus annuus George K. Helmkamp 1990-9-23 A- 11 Lassen 3 mi E of Susanville, along state road 36. 1345 Comment
  UCR209581  Helianthus annuus George K. Helmkamp, E. A. Helmkamp 2009-8-24 15527 Amador Northern San Joaquin Valley, Carbondale Road, 1.2 miles south of its junction with Lambert Road 101 Comment
  UCR253801  Helianthus annuus George K. Helmkamp, Elizabeth Helmkamp 2012-10-26 20061 San Joaquin San Joaquin Valley, along Hwy CA-26, 0.7 mile northeast of Bellota 50 Comment
  UCR103946  Helianthus gracilentus George K. Helmkamp 1997-6-21 2066 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 Comment
Read comments
Nov 19 2009
  UCR158756  Heliotropium curassavicum George K. Helmkamp, E. A. Helmkamp 2004-6-24 8695 Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 Comment
  RSA739791  Hemizonella minima George K. Helmkamp, E. A. Helmkamp 2007-6-6 12264 El Dorado along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road 1616 Comment
  UCR200939  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2008-9-30 14180 Calaveras Foothills, northern Sierra Nevada Mountains, along CA-49, 1.9 miles south of Mokelumne Hill 381 Comment
  UCR230746  Hemizonia fitchii George K. Helmkamp, E. A. Helmkamp 2010-10-20 17042 Sutter Sacramento Valley, Pleasant Grove Road 0.1 mile north of the junction with Marcum Road, S of Nicolaus Ave., 2 miles SE (105 deg. ) of Trowbridge 17 Comment
  UCR146651  Hemizonia increscens subsp. increscens George K. Helmkamp, E. A. Helmkamp 2004-10-1 8826 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
Read comments
Jan 10 2021
  UCR237737  Heracleum maximum George K. Helmkamp, E. A. Helmkamp 2012-7-14 19400 Amador Northern Sierra Nevada Mountains, edge of Martin Meadow along CA-88 (Carson Pass Hwy), 2.2 miles north of Silver Lake 2317 Comment
  UCR274887  Heracleum maximum George K. Helmkamp 1974-7-27 s.n. Mono Owens Valley, Owens River, Big Springs 2195 Comment
  RSA710339  Heteranthemis viscidihirta George K. Helmkamp 2004-4-1 8410 San Luis Obispo Central Coast: Nipomo Mesa; Mesa Dunes Mobile Home Park along Mesa View Dr., 0.2 miles S of Halcyon Road 76 Comment
  RSA614694  Heterodraba unilateralis George K. Helmkamp, E. A. Helmkamp 1997-3-7 1394 Kern San Emidgio Ranch, SE portion. 1494 Comment
  UCR200935  Heteromeles arbutifolia George K. Helmkamp, E. A. Helmkamp 2008-9-30 14177 Calaveras Foothills, northern Sierra Nevada Mountains, Campo Seco Road at its junction with CA-49 462 Comment
  UCR182286  Heterotheca grandiflora George K. Helmkamp, E. A. Helmkamp 2006-10-8 11484 Calaveras Northern Sierra Nevada Mountains Foothills, along Calif. Hwy 26, 0.8 mi east of Calif. Hwy 49 in the vicinity of Mokulumne Hill 488 Comment
  UCR131861  Heterotheca sessiliflora subsp. bolanderi George K. Helmkamp, E. A. Helmkamp 2000-6-18 5741 Mendocino North Coast, Glass Beach at Fort Bragg 9 Comment
  UCR58452  Heterotheca sessiliflora subsp. fastigiata George K. Helmkamp 1989-10-7 s.n. Riverside Peninsular Range; San Jacinto Mtns, roadside beside Hwy 243 near Lawlor Lodge, c. 2 mi north of Pine Cove 1600 Comment
  RSA0036007  Heuchera micrantha George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-5 20753 Sierra Along CA-49, 1.2 miles north of the Yuba County line 901 Comment
  SD236411  Heuchera micrantha G. K. Helmkamp, E. A. Helmkamp 2008-6-3 13581 El Dorado Sierra Nevada Mountains: Forbay Road, 7.1 miles northwest of CA-50 (road junction in Pollock Pines), no-outlet road leading to the South Fork of the American River 715 Comment
  SEINET8061130 Image available Heuchera micrantha George K. Helmkamp, E. A. Helmkamp 2009-6-25 15044 El Dorado Sierra Nevada Mountains Foothills: Forbay Road above South Fork American River, 6.4 miles north of Pony Express Trail in Pollock Pines 613 Comment
  UCR103608  Hibiscus denudatus George K. Helmkamp, E. A. Helmkamp 1998-3-19 2941 Imperial Sonoran (Colorado) Desert, Imperial Dam area, along Ferguson Rd, 1.5 mi. north of Hwy S-24. 91 Comment
  UCR250140  Hieracium albiflorum George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20812 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim's Road, 3.6 miles northwest of its junction with Forest Hill Road 768 Comment
  UCR258389  Hieracium albiflorum George K. Helmkamp, Amy Barnes 2014-8-11 23002 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCD133107  Hieracium argutum G. K. Helmkamp; E. A. Helmkamp 2006-8-11 11207 Placer Northern Sierra Nevada Mountain. Along the road to Clementine Lake, 0.8 mile north of Forest Hill road. 422 Comment
  JEPS119419  Holocarpha virgata subsp. virgata G. K. Helmkamp, E. A. Helmkamp 2009-8-24 15523 Amador Sierra Nevada Mountains Foothills, along CA-49 at the junction with Fiddletown Road in the city of Plymouth Comment
  UCD133246  Holocarpha virgata subsp. virgata G. K. Helmkamp; E. A. Helmkamp 2007-9-9 12908 El Dorado Northern Sierra Nevada Mountains: along South Shingle Road 2.5 miles south of Shingle Springs. 399 Comment
  UCR189944  Holocarpha virgata subsp. virgata George K. Helmkamp, E. A. Helmkamp 2007-9-9 12909 Sacramento Sacramento Valley, along CA-16, 0.2 mile west of the Amador County line. 91 Comment
  UCR235315  Holodiscus discolor George K. Helmkamp, William Barnes 2010-9-4 16942 Alpine Northern Sierra Nevada Mountains, Red Vista Road, 0.6 mile southeast of its junction with CA-88 just east of Carson Pass 2553 Comment
  UCR102574  Holodiscus microphyllus George K. Helmkamp, E. A. Helmkamp 1997-9-11 2357 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  RSA0047094  Holozonia filipes George K. Helmkamp, E. A. Helmkamp 2008-10-2 14196 Sacramento Sacramento Valley: Latrobe Road, 7.4 miles west of Latrobe. 67 Comment
  UCR234564  Hordeum brachyantherum subsp. brachyantherum George K. Helmkamp, E. A. Helmkamp 2011-8-19 18138 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 1.4 miles north of its junction with Tamarack Road 2506 Comment
  UCR59982  Hordeum brachyantherum subsp. californicum George K. Helmkamp 1988-9-8 s.n. Mono Eastern Sierra Nevada Mtns., Hwy 395, at Deadman's Pass 2451 Comment
  UCD85753  Hordeum jubatum G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11000 El Dorado Northern Sierra Nevada Mountains. Echo Summit along US Hwy 50. At entrance to the road maintenance station. 2244 Comment
  UCR173683  Hordeum leporinum George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10408 Nevada Northern Sierra Nevada Foothills, San Juan Ridge area at North Columbia, c. 9.3 mi. east of Calif. Hwy 49 884 Comment
  UCR162161  Hordeum murinum subsp. glaucum George K. Helmkamp, E. A. Helmkamp 2005-2-16 8927 San Luis Obispo Central Coast, Mesa Dune Mobile Home Park; SW of Arroyo Grande along Calif. Highway 1 76 Comment
  SEINET3828566  Hordeum murinum subsp. leporinum George K. Helmkamp, E. A. Helmkamp 2012-1 18785 Yolo Sacramento Valley: along County Road 26, 1.4 miles west of its intersection with Road 89, c. 12 miles WSW of Woodland. 65 Comment
  UCR253261  Hordeum vulgare George K. Helmkamp, Amy Barnes 2014-4-7 22721 Sacramento Sacramento Valley, Clay East Road, 1 mile east of its junction with CA-104 52 Comment
  UCR13790  Horkelia californica 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
  UCR201541  Horkelia californica George K. Helmkamp, E. A. Helmkamp 2008-9-28 14165 Amador Foothills, northern Sierra Nevada Mountains, Sutter Creek Rancho Road on the north side of CA-88 and 4.2 miles southwest of the junction of CA-88 and CA-49 287 Comment
  UCR161916  Horkelia cuneata George K. Helmkamp, E. A. Helmkamp 2005-3-1 8980 San Luis Obispo South Outer Coast Ranges, Santa Lucia Range NE of Lake Lopez; 0.3 mi. N of Hi Mountain Road along Upper Lopez Canyon Road 311 Comment
  CLARK-A1045-1418  Horkelia fusca subsp. parviflora George K. Helmkamp 1977-8-5 Mariposa Sierra Nevada Porcupine Flats Campground; on old road bed; ; Yosemite Falls 7.5'Q 2590 Comment
  UCR175732  Horkelia fusca subsp. parviflora George K. Helmkamp, E. A. Helmkamp 2006-7-31 11064 El Dorado Northern Sierra Nevada Mountains, along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50 2049 Comment
  UCR218761  Horkelia fusca subsp. parviflora George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16560 El Dorado Northern Sierra Nevada Mountains, southeast side of Wright's Lake, 5.8 mi. NE (34 deg. ) of Kyburz 2085 Comment
  UCR206042  Horkelia tridentata subsp. tridentata George K. Helmkamp, E. A. Helmkamp 2009-6-10 14942 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
  SD235007  Horkelia tridentata var. tridentata G. K. Helmkamp, E. A Helmkamp 2007-6-6 12261 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road (Old Iron Mountain 7.5' Q) 1616 Comment
  UCD113570  Horkelia tridentata var. tridentata G. K. Helmkamp; E. A. Helmkamp 2005-7-31 9747 El Dorado Northern Sierra Nevada: 20 mi. WSW of Lake Tahoe; Ice House Road, N of CA Highway 50 and 1.5 mi. S of junction with Ice House Reservoir. Comment
  SD143833  Horsfordia newberryi G. K. Helmkamp, E. A. Helmkamp 1998-3-19 2959 Imperial Little Picacho Wash along Picacho Road, 2.5 miles south of Picacho State Recreation Area. 152 Comment
  CAS-BOT-BC438808  Hosackia oblongifolia var. oblongifolia George K. Helmkamp; Elizabeth Helmkamp 2013-7-6 20967 Amador Northern Sierra Nevada Mountains: Bear River Road at the south end of the dam for Lower Bear River Reservoir. 1784 Comment
  CAS-BOT-BC400822  Hypericum anagalloides G. K. Helmkamp; E. A. Helmkamp 2008-6-23 13725 Amador Northern Sierra Nevada Mountains: Dufrene Road, 1.1 miles south of its junction with CA-88 (jct. is between Mormon Emigrant Trail and Bear River Reservoir Road), c. 2 miles (air) north of the west end of Lower Bear River Reservoir 2055 Comment
  UCD110336  Hypericum anagalloides G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11188 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 22.1 miles east of its junction with Sly Park Road. 2250 Comment
  UCR176385  Hypericum anagalloides George K. Helmkamp, E. A. Helmkamp 2006-7-7 10857 El Dorado Northern Sierra Nevada Mtns, Wright's Lake Road, 4.1 miles north of Hwy US-50, northeast of Kyburz 2049 Comment
  UCR176422  Hypericum anagalloides George K. Helmkamp, E. A. Helmkamp 2006-7-10 10898 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
  UCR252931  Hypericum calycinum George K. Helmkamp, E. A. Helmkamp 2013-11-27 22495 El Dorado Sierra Nevada Mountains Foothills, Capp's Crossing Road, 0.4 mile southeast of its junction with Mormon Emigrant Trail 1204 Comment
  UCR130067  Hypericum formosum subsp. scouleri George K. Helmkamp, E. A. Helmkamp 2001-7-7 6906 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
  RSA714207  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2005-7-11 9689 El Dorado 30 mi. SW of Lake Tahoe; 1 mi E of Jenkinson Lake along Mormon Emigrant Road (County Highway 5). 1220 Comment
  SD248443  Hypericum perforatum George K. Helmkamp, Elizabeth Helmkamp 2013-7-25 22039 El Dorado Northern Sierra Nevada Mountains: Wentworth Springs Road, 2.1 miles east of Stumpy Meadows Lake, 15.6 km NNE (06a^z) of Pollock Pines (Devil Peak 7.5'Q) 1356 Comment
  SEINET3245884  Hypericum perforatum G. K. Helmkamp, E. A. Helmkamp 2007-1 12940 El Dorado Northern Sierra Nevada Mountains: Along Hwy US-50 at Echo Summit. 2256 Comment
  UCR176412  Hypericum perforatum George K. Helmkamp, E. A. Helmkamp 2006-8-7 11153 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 16.7 miles east of its junction with Sly Park Road 1944 Comment
  UCR207892  Hypochaeris glabra George K. Helmkamp, E. A. Helmkamp 2009-5-12 14683 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park, Diamond Springs 530 Comment
  UCR257567  Hypochaeris glabra George K. Helmkamp, Amy Barnes 2014-4-23 22772 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
  UCR257771  Hypochaeris radicata George K. Helmkamp, Amy Barnes 2014-7-28 22939 A El Dorado Sierra Nevada Mountains Foothills, Lake Walton beside Balderston Road; 1/4 mile south of Wentworth Springs Road 966 Comment
  UC2015612  Ipomopsis aggregata subsp. aggregata G. Helmkamp 1995-9-23 3 -28 Alpine West side of Sonora Pass just beyond the Mono County line. Comment
  UCR114357  Ipomopsis aggregata subsp. bridgesii George K. Helmkamp, E. A. Helmkamp 2000-7-17 5828 Mono Sierra Nevada Mountains, South Twin Lake along Lake Mary Road, 3 miles SW of Mammoth Lakes 2561 Comment
  UCR123998  Ipomopsis aggregata subsp. formosissima George K. Helmkamp, E. A. Helmkamp 2001-7-6 6850 Plumas Sierra Nevada Mountains, Calif. Hwy 89, ESE of Lake Almanor at Crescent Mills 976 Comment
  UCR233460  Ipomopsis aggregata subsp. formosissima George K. Helmkamp, E. A. Helmkamp 2011-8-26 18180 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 12.9 miles east of Humbug Road, less than 1 mile northwest of Robinson Flat 2050 Comment
  UCR241355  Ipomopsis aggregata subsp. formosissima George K. Helmkamp, Mary Alice Barnes, E. A. Helmkamp 2012-9-8 19820 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 0.7 mile north of Robinson Flat Campground, about 26 miles northeast of Foresthill, Tahoe National Forest 2034 Comment
  CLARK-A1045-690  Ipomopsis polycladon George K. Helmkamp 1977-5-15 San Bernardino Mojave Desert Kelso [Cima?] Road; Kelso 15' Q Comment
  CLARK-A1045-829  Ipomopsis polycladon George K. Helmkamp 1978-5-6 San Bernardino Mesquite Mountains 0.2 mile east of Pass; Clark Mt. 15' Q; Mesquite Mountain 7.5' Q Comment
  RSA0035753  Iris hartwegii subsp. hartwegii George K. Helmkamp, Elizabeth A. Helmkamp 2013-6-15 20869 El Dorado Silver Fork Road, 2.3 miles south of its junction with US-50 in Kyburz 1454 Comment
  SEINET11261550  Iris tenuissima subsp. purdyiformis George Helmkamp, E. A. Helmkamp 2012-5-5 18913 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
  UCR206047  Iris tenuissima subsp. purdyiformis George K. Helmkamp, E. A. Helmkamp 2009-6-11 14978 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
  UCR235614  Iris tenuissima subsp. purdyiformis George K. Helmkamp, E. A. Helmkamp 2012-5-5 18913 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
  UCR45850  Isocoma acradenia var. acradenia George K. Helmkamp 1986-9-28 s.n. Inyo Northeastern Mojave Desert, lake at the north edge of Tecopa Hot Springs beside Hwy 127 427 Comment
  UCR132140  Iva nevadensis George K. Helmkamp, E. A. Helmkamp 1993-6-16 162 Inyo Owens Valley, 2 mi east of Pleasant Valley Campground along Chalk Bluff Road, NW of Bishop 1280 Comment
  UCR233159B  Juncus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17711 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  CLARK-A1045-1380  Juncus bufonius George K. Helmkamp 1978-4-23 San Luis Obispo Morro Bay Turri Road west of Morro Bay; Morro Bay S 7.5'Q Comment
  UCR206093  Juncus bufonius George K. Helmkamp, E. A. Helmkamp 2009-6-3 14882 El Dorado Sierra Nevada Mountains Foothills, Pony Express Trail, 0.7 mile east of its junction with Sly Park Road in Pollock Pines 851 Comment
  UCR233145B  Juncus bufonius var. bufonius George K. Helmkamp, E. A. Helmkamp 2011-7-12 17719 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 Comment
  UCD141431  Juncus chlorocephalus G. K. Helmkamp; E. A. Helmkamp 2007-6-29 12444 Amador Northern Sierra Nevada Mountains: Kirkwood Lake, about 0.5 mile north of CA-88 on the road to the campground. 2351 Comment
  UCR159837  Juncus dubius George K. Helmkamp, E. A. Helmkamp 2005-6-12 9630 San Luis Obispo South Coast Ranges, along Calif. Hwy 58 (Calf Canyon Hwy), 4.2 mi east of Santa Margarita 358 Comment
  UCR170429  Juncus effusus George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10034 El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, N of Union Valley Reservoir]; Wentworth Springs Road, 5.9 [road] mi east of Uncle Toms Cabin 1567 Comment
  UCD141508  Juncus effusus subsp. pacificus G. K. Helmkamp; E. A. Helmkamp 2007-8-21 12787 El Dorado Northern Sierra Nevada Mountains. Ice House Road. 21.3 miles north of CA-50 at Robbs Hut Road. 2078 Comment
  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
  UCR189207  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2007-9-11 12937 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50 at Echo Summit 2256 Comment
  UCR233330  Juncus ensifolius George K. Helmkamp, E. A. Helmkamp 2011-8-6 17983 Amador Northern Sierra Nevada Mountains, Ellis Road, 2.1 miles south of its junction with CA-88 1794 Comment
  UCR15902  Juncus hemiendytus George K. Helmkamp 1979-6-22 s.n. San Bernardino San Bernardino Mtns., Drying pool in Holcomb Valley 2287 Comment
  UCR257702  Juncus laccatus George K. Helmkamp, Amy Barnes 2012-8-19 19670 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
  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
  SEINET8465034 Image available Juncus macrandrus George K. Helmkamp, E. A. Helmkamp 2008-8-1 13954 El Dorado Northern Sierra Nevada Mountains: Dark Lake 0.4 mile northwest of the entrance to Wright's Lake along Wright's Lake Road. 2148 Comment
  RSA781382  Juncus oxymeris George K. Helmkamp, E. A. Helmkamp 2007-5-26 12111 Nevada Tyler Foote Crossing Road, 1.0 mile northeast of CA-49 622 Comment
  UCR253597  Juncus oxymeris George K. Helmkamp, Elizabeth Helmkamp 2012-11-5 20119 Amador Sierra Nevada Mountains Foothills, Along CA-26 on the north side of the bridge over the North Fork Mokelumne River 628 Comment
  UCR96395  Juncus parryi George K. Helmkamp 1996-9-26 1233 Mono Sierra Nevada Mtns, Twin Lakes north of city of Mammoth Lakes 2622 Comment
  CLARK-A1045-468  Juncus sphaerocarpus George K. Helmkamp 1979-6-22 San Bernardino San Bernardino Mountains beside Forest Service road 3N66Y, 400 yards north of 3N08; along flowing creek; ; Big Bear City 7.5' Q 2285 Comment
  UCR245588  Juncus tenuis George K. Helmkamp, Amy Barnes 2013-9-24 22361 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  CLARK-A1045-959  Juncus xiphioides George K. Helmkamp 1977-6-12 Tulare Kern River along the River, north of the entrance to the National Park [Forest?]; Kernville 7.5'Q Comment
  RSA519137  Juniperus occidentalis var. occidentalis George K. Helmkamp 1990-9-23 D- 6 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  RSA0037372  Keckiella breviflora subsp. breviflora George K. Helmkamp, Mary Alice Barnes 2013-5-3 20503 Placer Mosquito Ridge Road at the north side of the bridge over West Fork of North Fork American River, 5.2 mi. east (87 ) of Forest Hill 422 Comment
  CAS-BOT-BC235618  Keckiella breviflora var. breviflora G. K. Helmkamp; E. A. Helmkamp 2009-6-29 15059 El Dorado Sierra Nevada Mountains Foothills: Ice House Road, 0.2 miles north of its junction with CA-50, c. 73 miles ENE (83 deg. ) of Pollock Pines 989 Comment
  UCD123757  Keckiella breviflora var. breviflora G. K. Helmkamp; E. A. Helmkamp 2007-5-5 11930 El Dorado Northern Sierra Nevada Mountains. along CA-49, 3.7 miles northwest of Placerville. 548 Comment
  UCR117396  Keckiella cordifolia George K. Helmkamp, E. A. Helmkamp 1995-6-20 95- 2 - San Luis Obispo Central Coast, Bear Creek Ranch, 6 miles SE of Los Osos on Clark Valley Road 400 Comment
  CAS-BOT-BC434227  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. 1793 Comment
  RSA0053705  Kelloggia galioides G. K. Helmkamp, E. A. Helmkamp 2012-6-19 19223 Placer Northern Sierra Nevada Mountains: Devil's Thumb Road (Deadwood Rd.), 1.2 miles S of its junction with Foresthill Road 1648 Comment
  SBBG125690  Kelloggia galioides G. K. Helmkamp with E. A. Helmkamp 2009-6-29 15076 El Dorado Ice House Rd, 7.6 mi N of its juction with CA 50, ca. 10.5 air mi NE (74 deg) of Pollock Pines 1642 Comment
  SEINET4560772  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2010-1 16658 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 22 miles northeast of the city of Foresthill. 2041 Comment
  UCR233319  Kelloggia galioides George K. Helmkamp, E. A. Helmkamp 2011-9-13 18269 El Dorado Northern Sierra Nevada Mountains, Foster Meadow Road, 0.6 miles north of its junction with CA-88 2136 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
  UCD123878  Kickxia elatine G. K. Helmkamp; E. A. Helmkamp 2006-10-23 11563 Amador Central Valley/Northern Sierra Nevada Foothills; along CA-16, 0.2 mile east of Waits Station, southwest of Plymouth. 305 Comment
  UCD123879  Kickxia elatine G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12987 El Dorado Northern Sierra Nevada Mountains; junction of Lost Creek Road and French Creek Road just north of Frenchtown. 366 Comment
  UCR179560  Kickxia elatine George K. Helmkamp, E. A. Helmkamp 2006-9-29 11439 El Dorado Northern Sierra Nevada Mountains Foothills, Placerville outskirts; Calif. Hwy 49, 2 miles north of jct with US-50 549 Comment
  UCR253140  Kickxia elatine George K. Helmkamp, Elizabeth Helmkamp 2013-8-7 22105 Nevada Sierra Nevada Mountains Foothills, north of Auburn, Robles Drive, just south of the junction of Darkhorse Drive and Combie Rd. 444 Comment
  UCR261986  Kochia scoparia George K. Helmkamp, Amy Barnes 2014-10-10 23156 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Luther Pass 2287 Comment
  SBBG119151  Koeleria macrantha G. K. Helmkamp with E. A. Helmkamp 1998-8-11 4334 b Mono Campito Meadow, W of White Mtn Rd at Poison Crk 3293 Comment
  UCR235624  Kumlienia hystricula George K. Helmkamp, E. A. Helmkamp 2012-4-27 18873 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
  UCR194707  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2007-10-28 13106 Placer Sacramento Valley, along Nicolaus Road 5.8 miles west of Lincoln 27 Comment
  UCR232629  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2011-10-13 18418 El Dorado Northern Sierra Nevada Mountains Foothills, Forebay Road, 8.1 miles northwest of Pollock Pines, at north side of bridge over the South Fork American River 596 Comment
  UCR241994  Lactuca serriola George K. Helmkamp, E. A. Helmkamp 2012-9-7 19769 Amador Northern Sierra Nevada Mountains Foothills, along CA-49, 1.2 miles north of the junction with Fiddletown Road at Plymouth 299 Comment
  UCR161941  Lamarckia aurea George K. Helmkamp, E. A. Helmkamp 2005-3-1 8992 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
  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
  UCR161911  Lamium amplexicaule George K. Helmkamp, E. A. Helmkamp 2005-3-1 8984 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
  UCR118332  Langloisia schottii George K. Helmkamp, E. A. Helmkamp 1998-4-18 3343 San Bernardino Mojave Desert, north side of Dumont Sand Dunes, 5.2 miles east of Calif. Hwy 127 305 Comment
  UCR129535  Lasthenia gracilis George K. Helmkamp, E. A. Helmkamp 1998-5-21 4036 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  SD239742  Lathyrus nevadensis subsp. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-6-9 17519 Nevada Northern Sierra Nevada Mountains Foothills: Tyler Foote Crossing Road, 3.3 miles north of its junction with Grizzly Hill Road, NE of North Columbia near the Sierra Co. line / Middle Yuba River. 878 Comment
  SD239741  Lathyrus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2011-7-26 17888 Nevada Northern Sierra Nevada Mountains: along CA Hwy 20, 0.8 mi east of Bowman Lake Road, 1.23 mi NE (50a^z) of Emigrant Gap and 0.35 mi N of I-80 (Blue Canyon 7.5'Q) 1541 Comment
  SD241007  Lathyrus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2012-5-11 18954 Placer Northern Sierra Nevada Mountains Foothills: Finning Mill Road, 1.7 miles north of its junction with Forest Hill Road. 1041 Comment
  CAS-BOT-BC175712  Lathyrus sulphureus G. K. Helmkamp; E. A. Helmkamp 2007-5-18 12004 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 2.8 miles southeast of Foresthill 814 Comment
  SEINET11261547  Lathyrus sulphureus George Helmkamp, E. A. Helmkamp 2012-5-5 18914 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
  UCR173295  Lathyrus sulphureus George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10494 El Dorado Northern Sierra Nevada Foothills, Along Calif. Hwy 193, 0.4 mi. south of Kelsey 604 Comment
  UCR119936  Lavatera cretica George K. Helmkamp, E. A. Helmkamp 1999-5-20 4820 Santa Barbara Central Coast, Casmalia Hills; Corralitos Canyon, southeast of Guadalupe, 3.8 mi southeast of CA Hwy 1 on Brown Road 305 Comment
  UCR115588  Layia glandulosa George K. Helmkamp, E. A. Helmkamp 2000-6-15 5675 San Luis Obispo Central Coast, between Los Osos and sand dunes west of the end of Howard St. 15 Comment
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Jan 8 2013
  UCR141118  Layia hieracioides George K. Helmkamp, E. A. Helmkamp 1998-5-19 3811 A Monterey Central Coast Ranges, Salinas Valley Quinado Cyn., 12 mi south of King City along (G-14) Jolon Road 412 Comment
  RSA0035477  Layia pentachaeta subsp. pentachaeta George K. Helmkamp, Mary Alice Barnes 2013-4-18 20355 Placer Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 ) of Weimar 512 Comment
  SD260903  Layia pentachaeta subsp. pentachaeta George K. Helmkamp, Mary Alice Barnes 2013-4-18 20337 Placer Northern Sierra Nevada Mountains Foothills: Yankee Jim Road, 0.9 mil East of its junction with Canyon Way, 4.4 miles SE (167a^z) of Colfax (Colfax 7.5'Q) 561 Comment
  UCD133970  Layia pentachaeta subsp. pentachaeta G. K. Helmkamp; E. A. Helmkamp 2006-6-14 10714 Placer Northern Sierra Nevada Mountains foothills; 0.2 mile N of the Forest Hill Road on unnamed road to Lake Clementine (general area northeast of Auburn on Forest Hill Divide). 487 Comment
  UCR159303  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2005-4-22 9379 San Luis Obispo Inner South Coast Ranges, Carrizo Hwy at Mile-19 (Calif. Hwy 58, east of Santa Margarita near Wilson Corner) 470 Comment
  UCR206869  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2009-1-31 14314 Colusa Sacramento Valley, junction of Moon Bend Road and CA-20 at the south end of the city of Colusa 23 Comment
  UCR242782  Layia platyglossa George K. Helmkamp, E. A. Helmkamp 2010-4-7 15823 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
  SD241692  Leersia oryzoides George K. Helmkamp, E. A. Helmkamp 2011-10-8 18387 Glenn Northern Sacramento Valley: 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
  UCR233020  Leontodon taraxacoides George K. Helmkamp, E. A. Helmkamp 2011-5-12 17256 Placer Southern Sacramento Valley, south of Lincoln along Athens Ave., 1.6 mile east of Fiddyment Road, 0.6 mi. west of Industrial Ave. 41 Comment
  UCR171331  Leontodon taraxacoides subsp. taraxacoides George K. Helmkamp, E. A. Helmkamp 2005-10-8 10001 El Dorado Northern Sierra Nevada Foothills, SE off Calif. Highway 49 at junction of Patterson Drive and Pleasant Valley Road, SW of Diamond Springs 537 Comment
  UCR112647  Lepechinia calycina George K. Helmkamp, E. A. Helmkamp 1999-6-27 4954 Santa Clara South Coast Range, Sierra Azul, 5 mi south of San Jose & 1 mi NE of Lake Elsman 427 Comment
  RSA794918  Lepidium campestre George K. Helmkamp, E. A. Helmkamp 2011-7-17 17784 Nevada You Bet Road just northeast of its junction with CA-174, 1.25 mi. east (91 deg ) of Peardale 778 Comment
  UCR170792  Lepidium campestre George K. Helmkamp, E. A. Helmkamp 2005-9-30 9959 Placer Northern Sierra Nevada Mtns., Junction of Chalet and Alpine Meadows Roads west of Calif. Highway 89 (near Alpine ski area) 2081 Comment
  UCR123944  Lepidium dictyotum var. dictyotum George K. Helmkamp, E. A. Helmkamp 2001-4-27 6539 Kern San Joaquin Valley, Enos Lane Rd., 1.9 mi south of Calif. Hwy 119, NE of Taft 61 Comment
  UCR48047  Lepidium flavum 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
  UCR246644  Lepidium heterophyllum George K. Helmkamp, E. A. Helmkamp 2012-6-6 19150 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 5.8 miles south of its junction with CA-88, 6.2 mi. SW (246 deg. ) of Bear River Reservoir dam 1465 Comment
  CLARK-A1045-790  Lepidium lasiocarpum George K. Helmkamp 1978-4-8 San Bernardino Mojave Desert 5 miles north of Lucerne [Dry] Lake at Lucerne Valley cutoff; creosote bush scrub; Ord Mts 15'Q Comment
  UCR30098  Lepidium lasiocarpum George K. Helmkamp 1983-4-5 483 8 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  SD257227  Lepidium latifolium George K. Helmkamp, Mary Alice Barnes 2013-5-8 20527 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
  SEINET2033409 Image available Lepidium latifolium George K. Helmkamp, E. A. Helmkamp 2008-1 14257 Colusa Sacramento Valley; along River Road (generally following the Sacramento River), 1.1 miles north of Colusa (Meridian 7.5' Q.: 39 deg. 13'33''N, 121 deg. 59'43''W, +/- 1000m). 18 Comment
  CAS-BOT-BC89945  Lepidium nitidum G. K. Helmkamp; E. A. Helmkamp 1997-3-7 1376 Kern San Emigdio Ranch, southeast portion. 945 Comment
  UCR189465  Lepidium nitidum var. nitidum George 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
  UCR250091  Lepidium nitidum var. nitidum George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20197 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26, 5.1 miles southwest of Mokelumne Hill 393 Comment
  UCR257562  Lepidium nitidum var. nitidum George K. Helmkamp, Elizabeth Helmkamp 2014-2-17 22515 El Dorado Sierra Nevada Mountains Foothills, along Marshall Road, 0.1 mile northeast of its junction with CA-49, above S Fork American River, NW of Colma 235 Comment
  UCR161351  Lepidium pinnatifidum George K. Helmkamp, E. A. Helmkamp 2005-3-8 9068 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon Road, 4.6 mi west of Los Osos Valley Road 316 Comment
  SEINET13276808 Image available Lepidium strictum George K. Helmkamp, Elizabeth Helmkamp 2013-1 20222 Stanislaus Eastern San Joaquin Valley: along CA-4, 1.5 miles east of the San Joaquin County line, 12.5 mi. WSW (259 deg. ) of Copperopolis (Bachelor Valley 7.5' Q.) 70 Comment
  UCR253479  Lepidium strictum George K. Helmkamp 2014-4-5 22688 Amador Eastern edge of San Joaquin Valley/lower Sierra Nevada Foothills, Sutter Creek along West Marlette Street, 0.1 mile east of Dave Brubeck Road, west end of city of Ione 85 Comment
  UCR257027  Lepidium strictum George K. Helmkamp, Amy Barnes 2014-3-21 22601 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
  CLARK-A1045-306  Lepidium virginicum George K. Helmkamp 1977-3-20 Riverside Deep Canyon Pinyon Pines area; ; ; Palm Desert 15'Q 1066 Comment
  UCD115873  Lepidium virginicum G. K. Helmkamp 2007-7-7 12464 El Dorado Northern Sierra Nevada Mountains: along CA-89, 0.9 mile west of Luther Pass in the Grass Lake area. 2338 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
  UCR189468  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2007-9-11 12929 El Dorado Northern Sierra Nevada Mountains, along Hwy US-50, 0.4 mile southwest of Phillips 1829 Comment
  UCR191090  Lepidium virginicum var. virginicum George K. Helmkamp, E. A. Helmkamp 2007-6-12 12323 Placer Northern Sierra Nevada Mountains, Lake Spaulding Road just north of its junction with Hwy CA-20 1610 Comment
  UCR89814  Leptochloa uninervia George K. Helmkamp 1994-3-10 42- 16 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
  UCR94628  Leptochloa uninervia George K. Helmkamp 1996-9-11 1176 San Diego Peninsular Range, c. 5 miles south of Calif. Hwy 76 on Couser Canyon Road onto Lilac Rd. to Wills Avocado Ranch 335 Comment
  UCR103980  Leptodactylon californicum George K. Helmkamp 1997-3-11 1468 Santa Barbara 32 mi. west of New Cuyama along Calif. Hwy 166 399 Comment
  SD241131  Leptosiphon bicolor George K. Helmkamp, E. A. Helmkamp 2010-4-17 15899 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, 8.3 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q). 308 Comment
  SD241132  Leptosiphon bolanderi George K. Helmkamp, E. A. Helmkamp 2011-5-21 17352 Calaveras Northern Sierra Nevada Mountains Foothills: Railroad Flat Road at junction with Wharregard Road and beside Esperanzo Creek, 8.3 miles NW (289a^z) of Arnold (Fort Mountain 7.5'Q) 758 Comment
  UCR122805  Lesquerella tenella George K. Helmkamp, E. A. Helmkamp 2001-3-31 6336 San Bernardino Eastern Mojave Desert, Goffs Rd, 8.1 mi east of Goffs 610 Comment
  RSA0039244  Lessingia leptoclada George K. Helmkamp, Elizabeth A. Helmkamp 2013-9-13 22293 Amador Fiddletown Road, 0.4 mile west of its junction with Shake Ridge Road 977 Comment
  RSA0093477  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2012-9-1 19741 Calaveras Northern Sierra Nevada Mountains Foothills. along CA-26 (West Point-Pioneer Rd.) on the south side of the North Fork Mokelumne River. 584 Comment
  SD240882  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2011-7-19 17804 Tuolumne Northern Sierra Nevada Mountains Foothills: Forest Route 5N14, 1.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River (Boards Crossing 7.5'Q) 1143 Comment
  UCR179355  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2006-9-20 11412 El Dorado Northern Sierra Nevada Mountains Foothills, junction of Ice House Road [at Riverton] and US-50 east of Pacific 1000 Comment
  UCR240942  Lessingia leptoclada George K. Helmkamp, E. A. Helmkamp 2012-9-1 19741 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26 (West Point-Pioneer Rd.) on the south side of the North Fork Mokelumne River 584 Comment
  UCR233325  Leucanthemum vulgare George K. Helmkamp, E. A. Helmkamp 2011-9-1 18226 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  SEINET3071987 Image available Lewisia nevadensis George K. Helmkamp, E. A. Helmkamp 2007-5-31 12222 El Dorado Northern Sierra Nevada Mountains: Wright's Lake Road, north of US-50 at the Lyon's Creek trailhead and creek crossing (Pyramid Peak 7.5' ) 2060 Comment
  UCR190627  Ligusticum grayi George K. Helmkamp 2007-6-29 12422 El Dorado Northern Sierra Nevada Mountains, Tragedy Spring, just north of CA-88 2421 Comment
  UCR229441  Ligusticum grayi George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18086 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  UCR258128  Ligusticum grayi George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19553 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
  UCR215902  Lilium humboldtii subsp. humboldtii George K. Helmkamp, Amy Barnes 2009-7-12 15171 Placer Sierra Nevada Mountains Foothills, along Foresthill Road at the northeast end of the city of Foresthill 985 Comment
  UCR122349  Lilium kelleyanum George K. Helmkamp, Elizabeth Helmkamp 2000-7-19 5893 Mono Sierra Nevada Mountains., West side of Lake Mary, southwest of Mammoth Lakes 2652 Comment
  UCR123121  Lilium parvum George K. Helmkamp, E. A. Helmkamp 1998-8-13 4404 Mono Eastern Sierra Nevada Mountains, Nunatak trail beside CA Hwy 120, about 1 mi south of Yosemite National Park entrance kiosk 2973 Comment
  SEINET4560793  Limnanthes alba subsp. alba George K. Helmkamp, E. A. Helmkamp 2011-1 17334 Calaveras Northern Sierra Nevada Mountains: Rail Road Flat Road, 1.2 miles south of its junction with Ridge Road, 10.1 mi. ENE (83 degrees) of Mokelumne Hill. 854 Comment
  UCR198489  Limnanthes alba subsp. alba George K. Helmkamp, E. A. Helmkamp 2008-5-4 13379 Amador Sierra Nevada Mountains, Barton, c. 15 miles (air) NE of Jackson, at the junction of Tiger Creek Road and Black Prince Road, 0.6 mil east of the junction of Tiger Creek Road with CA-88 936 Comment
  SBBG128840  Limnanthes floccosa subsp. californica G. K. Helmkamp, E. A. Helmkamp 2011-4-10 17151 Placer Riosa Rd at the E edge of the village of Sheridan, Sacramento Valley 41 Comment
  CLARK-A1045-682  Linanthus aureus George K. Helmkamp 1978-5-6 #2 San Bernardino Mojave Desert south slope of Kingston Range; ; Kingston Peak 15' Q 1280 Comment
  UCR234014  Linanthus bicolor George K. Helmkamp, E. A. Helmkamp 2011-5-21 17331 Calaveras Northern Sierra Nevada Mountains Foothills, Rail Road Flat Road, 1.2 miles south of its junction with Ridge Road, 10.1 mi. ENE (83 deg. ) of Mokelumne Hill 854 Comment
  CLARK-A1045-673  Linanthus ciliatus George K. Helmkamp 1977-5-21 Riverside San Jacinto Mountains forest west of Pine Cove; Palm Springs 15'Q Comment
  RSA0093527  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-26 19255 Amador Northern Sierra Nevada Mountains. Panther Creek Road, 0.4 mile south of its junction with CA-88/Carson Pass Hwy and W of Lower Bear Reservoir. 1643 Comment
  UCR206997  Linanthus ciliatus George K. Helmkamp, Amy Barnes 2009-7-8 15153 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
  UCR233155B  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17720 Calaveras Northern Sierra Nevada Mountains, Winton Road, 9.6 miles east of its junction with CA-26 in West Point 1299 Comment
  UCR246582  Linanthus ciliatus George K. Helmkamp, E. A. Helmkamp 2012-6-6 19138 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
  CLARK-A1045-799  Linanthus dichotomus George K. Helmkamp 1978-4-9 San Bernardino Mojave Desert in saddle near campground road, north slope of Ord Mountain; Ord Mts 15' Q 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
  SD225056  Linanthus maculatus G. K. Helmkamp 1998-3-30 3059 San Bernardino Mojave Desert: E of town of Joshua Tree & S of Copper Mtn, 0.4 mi. E of the S end of Kerr Rd near Joshua Tree National Park Comment
  SEINET2042543 Image available Linanthus parryae George K. Helmkamp, E. A. Helmkamp 2001-5-2 6660 Los Angeles Antelope Valley, 0.1 mi W of CA-138 on Ave. W, then 0.3 mi S on dirt road. 976 Comment
  UCR206787  Linanthus pygmaeus subsp. continentalis George K. Helmkamp, E. A. Helmkamp 2009-7-2 15104 El Dorado Sierra Nevada Mountains, Wrights Road at Chimney Flat, 3.4 miles north of junction with US-50 2037 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
  CAS-BOT-BC520359  Linum bienne George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20717 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy CA-20, 3.5 mi W of CA-49 in Grass Valley 623 Comment
  UCR93700  Linum bienne George K. Helmkamp 1996-5-25 1067 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
  UCR119830  Linum lewisii var. lewisii George K. Helmkamp 1998-6-27 4110 Riverside Santa Rosa Mtns., 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), below Mountain Home Spring 1799 Comment
  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
  UCR185228  Lithophragma bolanderi George K. Helmkamp, E. A. Helmkamp 2007-4-23 11792 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
  IRVC28174  Lithophragma bolanderi G. K. Helmkamp, E. A. Helmkamp 2000-4-24 5500 Monterey Nacimiento Rd. 12 mi N of Gorda and 3.8 mi E of CA-1. Central outer coast ranges. 549 Comment
  UCR123938  Lithophragma cymbalaria George K. Helmkamp, E. A. Helmkamp 2001-4-27 6551 Kern Temblor Range, CA Hwy 58, 1.1 mi SW of the San Luis Obispo Co. line 793 Comment
  UCR87509  Lithophragma parviflorum George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 16.1 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR88346  Lomatium plummerae George K. Helmkamp, E. Helmkamp 1995-6-23 95- 6 -10 Alpine Sierra Nevada Mtns, Calif. Hwy 89, 6.0 mi east of the junction with Calif. Hwy 4 on the way to Monitor Pass. Slope above Monitor Creek 2200 Comment
  UCR234191  Lonicera hispidula George K. Helmkamp, E. A. Helmkamp 2011-7-7 17651 El Dorado Northern Sierra Nevada Mountains, Capps Crossing (Bonnetti) Road, 2.8 miles south of its junction with Mormon Emigrant Trail 1297 Comment
  UCR206103  Lonicera hispidula var. vacillans George K. Helmkamp, E. A. Helmkamp 2009-6-3 14899 El Dorado Northern Sierra Nevada Mountains, Forbay Road, 4.7 miles northwest of its junction with Pony Express Trail in Pollock Pines 945 Comment
  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
  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
  UCR116698  Lotus grandiflorus George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Angelus Oaks, below Barton Flats on Hwy 38 1829 Comment
  UCR217334  Lotus humistratus George K. Helmkamp, E. A. Helmkamp 2010-6-14 16287 El Dorado Sierra Nevada Mountains Foothills, Slug Gulch Road, 4.5 miles from its junction with Perry Creek Road, 3.5 air mi. ESE (96 deg. ) of Fair Play 1059 Comment
  UCR257074  Lotus humistratus George K. Helmkamp, Amy Barnes 2014-4-23 22775 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
  UCR208265  Lotus micranthus George K. Helmkamp, E. A. Helmkamp 2009-5-7 14645 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.9 miles east of its junction with Forest Hill Road in Foresthill 476 Comment
  UCR242760  Lotus micranthus George K. Helmkamp, E. A. Helmkamp 2011-5-24 17371 El Dorado Northern Sierra Nevada Mountains Foothills, Mesquite Road, 7.5 miles south of its junction with Wentworth Springs Road 1073 Comment
  UCR234650  Lotus nevadensis var. nevadensis George K. Helmkamp, E. A. Helmkamp 2010-8-26 16831 Nevada Northern Sierra Nevada Mountains, South Fork Yuba River, Forest Route 85 (Fordyce Lake Rd) north of Hampshire Rocks Road and I-80, 1 mi. NNW (351 deg. ) of Cisco 1634 Comment
  UCR173987  Lotus oblongifolius var. oblongifolius George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10769 El Dorado Northern Sierra Nevada Mountains, about 1.3 miles north of Hwy US-50 on Wrights Lake Road 1677 Comment
  UCR215779  Lotus oblongifolius var. oblongifolius George K. Helmkamp, E. A. Helmkamp 2009-7-30 15354 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR118337  Lotus purshianus George K. Helmkamp, E. A. Helmkamp 2000-9-2 5964 San Luis Obispo Central Coast Range, Irish Hills, Prefumo Canyon, 2.2 mi west of Los Osos Valley Road 137 Comment
  UCR78903  Lotus purshianus George K. Helmkamp 1993-9-22 34- 17 San Bernardino San Bernardino Mtns., 6.7 mi. up Burns Canyon from junction of Pioneertown and Pipes Canyon Roads 1529 Comment
  SEINET269523 Image available Lotus purshianus G. Helmkamp 1994-5-18 91 -13 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
  RSA746969  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2008-10-14 14242 Colusa along River Road (generally following the Sacramento River), 1.1 miles north of Colusa 18 Comment
  RSA794891  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-7-12 17733 Calaveras Winton Road (Forest Route 7N03), 14.4 miles east of its junction with CA-26 in West Point. 1590 Comment
  SEINET2441570  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2009-6-11 14980 Shasta Southern Cascade Range: nRoad 300, a side road without an official road sign, at the north side of CA-44; 9.7 miles east of Shingletown (Viola 7.5' Q.). 1261 Comment
  UCR170797  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2005-9-30 9933 Placer Northern Sierra Nevada Mtns., Hampshire Rocks Road south of the I-80 Rainbow exit (c. 2 mi east of Cisco Grove) 1805 Comment
  UCR191141  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2007-8-26 12810 Amador Northern Sierra Nevada Mountains Foothills, along Hwy CA-49 at mile-20, 2.1 miles north of Plymouth; beside Blue Indian Creek 299 Comment
  UCR233390  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-8-26 18170 Placer Northern Sierra Nevada Mountains, along Forest Hill Road, 0.4 miles west of Robinson Flat 2041 Comment
  UCR234606  Lotus purshianus var. purshianus George K. Helmkamp, E. A. Helmkamp 2011-8-6 18019 Amador Northern Sierra Nevada Mountains, along dirt road 0.3 mile east of Bear River Reservoir Road, from a point 0.7 mile south of CA-88 1986 Comment
  UCR122808  Lotus salsuginosus var. brevivexillus George K. Helmkamp, E. A. Helmkamp 2001-3-31 6349 San Bernardino Eastern Mojave Desert, NE side of junction of US-95 and I-40 366 Comment
  SEINET12804265  Lotus salsuginosus var. salsuginosus George K. Helmkamp, E. A. Helmkamp 2005-1 9029 San Luis Obispo Outer South Coast Ranges, N of Lopez Lake, Upper Lopez Cyn Road, 5.5 mi N of jct with Lopez Road (Tar Spring Ridge 7.5' Q: Near 35.14'11"N, 120.28'W) 619 Comment
  UCR134385  Lotus scoparius var. scoparius George K. Helmkamp 2003-9-19 8155 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  UCR134389  Lotus scoparius var. scoparius George K. Helmkamp, E. A. Helmkamp 2001-4-29 6582 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  UCR140069  Lotus scoparius var. scoparius George K. Helmkamp 2004-3-13 8348 San Luis Obispo Central Coast, Nipomo Mesa, between Arroyo Grande and Nipomo, Willow Rd, 0.6 mi east of Calif. Hwy 1 91 Comment
  UCR158189  Lotus scoparius var. scoparius George K. Helmkamp 2004-6-12 8627 Santa Barbara Central Coast Range, Purissima Hills. Harris Grade Rd at '28.04 mi', about 3 mi south of CA Hwy 135 229 Comment
  UCR130641  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 1999-4-18 4698 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
  UCR158610  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 2005-4-16 9357 Santa Barbara Outer South Coast Ranges, Sierra Madre Mountains, 7.5 mi south of Calif. Hwy 166 on Miranda Pines Road 1155 Comment
  UCR97565  Lotus strigosus George K. Helmkamp, E. A. Helmkamp 1997-3-8 1431 San Luis Obispo South Coast Range, along CA Hwy 58 west of Navajo Creek, west of Carrizo Plain 564 Comment
  UCR102963  Lotus strigosus var. tomentellus George K. Helmkamp 1998-3-30 3036 San Bernardino Mojave Desert, vicinity of Twentynine Palms; Encelia Ave., 1.0 mi. north of Calif. Hwy 62 793 Comment
  UCR122582  Lotus strigosus var. tomentellus George K. Helmkamp, E. A. Helmkamp 2001-3-31 6369 San Bernardino Eastern Mojave Desert, NE side of junction of US-95 and I-40 366 Comment
  RSA709460  Lotus wrangelianus George K. Helmkamp 2004-4-21 8464 Santa Barbara San Rafael Mountains: Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn. Rd. 412 Comment
  CLARK-A1045-402  Ludwigia peploides George K. Helmkamp 1979-5-15 Riverside Jurupa ""at S.A. Picnic Area""; ; Fontana 7.5' Q 243 Comment
  SD148165  Lupinus adsurgens G. K. Helmkamp, E. A. Helmkamp 2001-7-6 6858 Plumas Sierra Nevada Mountains: CA-89, ESE of Lake Almanor at Crescent Mills. 975 Comment
  UCR189634  Lupinus adsurgens George K. Helmkamp, E. A. Helmkamp 2007-7-27 12630 Placer Northern Sierra Nevada Mountains, Southeast end of Cisco Grove; along local road just before it passes under Interstate-80 1744 Comment
  UCR250177  Lupinus albicaulis George K. Helmkamp, Mary Alice Barnes 2013-5-3 20460 Placer Foothills, northern Sierra Nevada Mountains, SW edge of Foresthill, Mosquito Ridge Road, 0.2 mile south of Forest Hill Road 974 Comment
  SD148164  Lupinus albifrons var. albifrons G. K. Helmkamp, E. A. Helmkamp 2000-4-21 5429 Monterey Los Padres National Forest: Nacimiento Rd, 0.7 mi east of CA -1 (Nacimiento Rd is about 12 mi N of Gorda). 548 Comment
  SD248424  Lupinus albifrons var. albifrons George K. Helmkamp, Mary Alice Barnes 2013-4-18 20361 Placer Northern Sierra Nevada Mountains Foothills: Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 miles ENE of Weimar. 512 Comment
  UCD106028  Lupinus albifrons var. albifrons G. K. Helmkamp; Elizabeth A. Helmkamp 2006-5-31 10574 El Dorado Northern Sierra Neveda Mountains, Wright's Lake Road just north of Hwy. US-50. 1665 Comment
  UCR218153  Lupinus albifrons var. albifrons George K. Helmkamp, Amy Barnes 2010-5-7 15974 Calaveras Sierra Nevada Mountains Foothills, along CA-49, 0.4 mile north of its junction with CA-12, vicinity of San Andreas 233 Comment
  SD248425  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 Highway E-16 at Jenkinsons Lake. 1456 Comment
  UCR122809  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 1998-5-19 3883 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR127137  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 1998-5-19 3832 Monterey Salinas Valley, 3.7 mi south of Lockwood on G-14, Interlake Road near northwest end of Lake San Antonio 320 Comment
  UCR197341  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2008-5-8 13407 Calaveras Sierra Nevada Mountains Foothills, along CA-26, 1.7 miles northeast of Glencoe 674 Comment
  UCR207853  Lupinus albifrons var. collinus George K. Helmkamp, E. A. Helmkamp 2009-4-22 14556 Placer Sierra Nevada Mountains Foothills, Forest Hill Road 0.8 mile east of its junction with CA-49 and the North and Middle Forks of the American River 277 Comment
  CLARK-A1045-565  Lupinus andersonii George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains dirt road [unpaved State Highway 173] between Lake Arrowhead and Mojave River Forks Regional Park; ; Lake Arrowhead 7.5'Q 1523 Comment
  UCR116695  Lupinus andersonii George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Calif. Hwy 38 near Heart Bar State Park 1982 Comment
  UCR219672  Lupinus angustiflorus George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16574 A El Dorado Northern Sierra Nevada Mountains, southeast side of Wright's Lake, 5.8 mi. NE (34 deg. ) of Kyburz 2085 Comment
  UCR129539  Lupinus argenteus var. meionanthus George K. Helmkamp, E. A. Helmkamp 2001-7-8 6832 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  CLARK-A1045-305  Lupinus arizonicus George K. Helmkamp 1977-3-20 Riverside Deep Canyon Pinyon Pines area; ; ; Palm Desert 15'Q 1066 Comment
  SD143899  Lupinus arizonicus G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2885 Imperial 4.7 mi N of Winterhaven on Picacho rd & 1 mi NW of the All-American Canal. 75 Comment
  RSA0094637  Lupinus benthamii George K. Helmkamp, Mary Alice Barnes 2013-5-17 20645 Calaveras Northern Sierra Nevada Mountains Foothills. Along CA Hwy 26, 0.4 mile northeast of its junction with Campo Seco Turnpike Road, SW of Mokelumne Hill. 438 Comment
  SEINET2440974  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2010-5-14 16023 El Dorado Sierra Nevada Mountains Foothills: along CA-16 (Mt. Aukum Rd.), 1.8 mi NE of Somerset (Camino 7.5'). 567 Comment
  UCR208610  Lupinus benthamii George K. Helmkamp, E. A. Helmkamp 2009-5-7 14626 Placer Sierra Nevada Mountains Foothills, Oxbow Road, 2.0 miles south of its junction with Mosquito Ridge Road; north edge of Oxbow Reservoir 402 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
  UCR258385  Lupinus benthamii George K. Helmkamp 2014-5-21 22914 El Dorado Sierra Nevada Mountain Foothills, Bucks Bar Road, 0.8 mile northwest of the bridge over North Fork Cosumnes River 605 Comment
  CAS-BOT-BC444015  Lupinus bicolor George K. Helmkamp; Elizabeth Helmkamp 2013-4-13 20325 Nevada Northern Sierra Nevada Mountains Foothills: Wolf Road, 1.6 miles northwest of its junction with CA-49. 123 Comment
  RSA0114571  Lupinus bicolor George K. Helmkamp, Mary Alice Barnes 2013-4-30 20441 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
  SD193282  Lupinus bicolor G. K. Helmkamp, E. A. Helmkamp 2005-4-16 9341 Santa Barbara 1.1 mile south of Highway CA 166 on Miranda Pines Road. 526 Comment
  UCD107252  Lupinus bicolor G. K. Helmkamp; E. A. Helmkamp 2007-5-1 11911 El Dorado Northern Sierra Nevada Mountains; access to road to South Fork American River along CA-49, 4.4 miles northwest of Coloma. 207 Comment
  UCR107353  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 1998-5-14 3619 Fresno Inner South Coast Range, Warthan Creek Canyon, near Curry Mtn., c. 6-7 miles (airline) SW of Coalinga, along Calif. Hwy 198, 20.8 mi. west of Interstate 5 366 Comment
  UCR184823  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2007-3-14 11629 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
  UCR206803  Lupinus bicolor George K. Helmkamp, E. A. Helmkamp 2009-3-19 14418 El Dorado Northern Sierra Nevada Mtns. Foothills, Rock Creek Road, 4.1 miles east of its junction with CA-193 485 Comment
  UCR250300  Lupinus bicolor George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20218 Stanislaus Eastern San Joaquin Valley, along CA-4, 1.5 miles east of the San Joaquin County line, 12.5 mi. WSW (259 deg. ) of Copperopolis 70 Comment
  UCR250605  Lupinus bicolor George K. Helmkamp, Mary Alice Barnes 2013-4-24 20382 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
  UCR132758  Lupinus brevicaulis George K. Helmkamp, E. A. 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-A1045-1097  Lupinus breweri var. bryoides George K. Helmkamp 1977-7-3 Mono Sierra Nevada road to the Lake; ; Tioga Pass 7.5'Q 2895 Comment
  UCR140157  Lupinus chamissonis George K. Helmkamp 2004-2-29 8322 San Luis Obispo Central Coast, Nipomo Mesa, Nipomo, Orchard Ave. 0.1 mi NW of Division St. 116 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-A1045-699  Lupinus excubitus subsp. austromontanus 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
  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
  UCR176026  Lupinus fulcratus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11033 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  UCR130651  Lupinus hirsutissimus George K. Helmkamp, E. A. Helmkamp 1999-4-15 4660 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
  SEINET273105  Lupinus latifolius G. K. Helmkamp, E. A. Helmkamp 1998-5-18 3784 Santa Clara Central Coast Range: Mt. Hamilton Rd (Hwy CA-130) E of San Jose; 15.2 mi form the W origin of the Hwy. 610 Comment
  CLARK-A1045-1091  Lupinus latifolius var. columbianus George K. Helmkamp 1978-6-10 Mono Owens River wet meadow; Arcularius Ranch; ; Crestview 7.5'Q 2163 Comment
  UCD108187  Lupinus latifolius var. columbianus G. K. Helmkamp; E. A. Helmkamp 2006-8-7 11162 El Dorado Northern Sierra Nevada Mountains: Mormon Emigrant Trail, 21.0 miles east of its junction with Sly Park Road. 2174 Comment
  UCR231013  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2010-8-7 16719 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
  UCR251273  Lupinus latifolius var. columbianus George K. Helmkamp, E. A. Helmkamp 2012-7-6 19361 El Dorado Northern Sierra Nevada Mountains, Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50 2078 Comment
  UCR257923  Lupinus latifolius var. columbianus George K. Helmkamp, Amy Barnes 2014-7-28 22957 El Dorado Northern Sierra Nevada Mountains, Wentworth Springs Road, 1.6 miles west of Ice House Road 1863 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
  UCR15449  Lupinus lepidus George K. Helmkamp 1977-8-5 s.n. Tuolumne Sierra Nevada Mountains, Porcupine Flat Campground 2591 Comment
  UCD108251  Lupinus lepidus var. confertus G. K. Helmkamp; E. A. Helmkamp 2005-9-30 9964 Placer Northern High Sierra Mountains: ca. 3.5 mi NW of Lake Tahoe; Along the Truckee River and CA Highway 89, 0.1 mi N of Alpine Meadows Road. 1902 Comment
  UCR13973  Lupinus lepidus var. confertus George K. Helmkamp 1973-9-25 s.n. San Bernardino San Bernardino Mtns, lakes just east of Fawnskin, Moon's Camp 2058 Comment
  UCR176051  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11020 El Dorado Northern Sierra Nevada Mtns, North Truckee River Rd., 1.4 miles north of Calif. Hwy 50 and c. 6 miles south of Lake Tahoe 2009 Comment
  UCR196914  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2008-7-22 13855 Alpine Eastern Sierra Nevada Mountains, Blue Lake Road just southeast of its junction with CA-88 2180 Comment
  UCR234601  Lupinus lepidus var. confertus George K. Helmkamp, E. A. Helmkamp 2011-8-19 18105 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 6.6 miles south of its junction with CA-88 2296 Comment
  UCR258129  Lupinus lepidus var. confertus George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19551 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
  UCR59981  Lupinus lepidus var. confertus George K. Helmkamp 1988-9-7 s.n. Mono Eastern Sierra Nevada Mountains, Hwy 395, 29 miles north of Inyo Co. line 2195 Comment
  SD247423  Lupinus lepidus var. sellulus George Helmkamp, Elizabeth Helmkamp 2013-8-2 22095 Alpine Northern Sierra Nevada Mountains: along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam (Caples Lake 7.5'Q) 2486 Comment
  UCR121456  Lupinus lepidus var. sellulus George K. Helmkamp, E. A. Helmkamp 1999-6-29 5047 Nevada Northern Sierra Nevada Range, Prosser Creek at Hobart Mills, c. 50-100 yards east of Calif. Hwy 89, NE of Lake Tahoe 1707 Comment
  SD227817  Lupinus microcarpus var. densiflorus G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3601 Fresno Coast Range: Warthan Crk Cyn, near Curry Mtn., ca. 6-7 miles (airline) SW of Coalinga, along CA Hwy 198, 20.8 mi. W of Hwy I-5. 395 Comment
  UCR102080  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-5-14 3601 Fresno Inner South Coast Range, Warthan Creek Canyon, near Curry Mtn., c. 6-7 miles (airline) SW of Coalinga, along Calif. Hwy 198, 20.8 mi. west of Interstate 5 366 Comment
  UCR102512  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-4-9 3279 Kern Foothills of the Tehachapi Mtns., east of Arvin along Calif. Hwy 223 305 Comment
  UCR130385  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 1998-5-21 4032 Kern Western Mojave Desert, South base, Tehachapi Mtns., 4.0 mi north of Calif. Hwy 138 (Lancaster Rd) on 300th St. West 1006 Comment
  UCR187301  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2007-4-5 11744 Amador Foothills, Northern Sierra Nevada Mountains, along CA-49, 0.2 mile west of Amador City 309 Comment
  UCR194975  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2007-5-18 11996 Placer Northern Sierra Nevada Mountains Foothills, Forest Hill Road, 4.3 miles northeast of the bridge over the junction of North and West Forks of the American River 485 Comment
  UCR217402  Lupinus microcarpus var. densiflorus George K. Helmkamp, E. A. Helmkamp 2010-6-14 16295 El Dorado Sierra Nevada Mountains Foothills, County Highway E-16, 1.3 miles southwest of Somerset 530 Comment
  RSA747033  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2007-5-7 11965 El Dorado Pedro Hills Road, 0.5 mile west of its junction with Calif. Hwy 49, junction of roads 5.3 miles south of Cool 311 Comment
  RSA751086  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2008-5-8 13403 Calaveras Ridge Road, 1.6 miles east of CA-26, southeast of Glencoe 866 Comment
  SEINET13203143 Image available Lupinus nanus George K. Helmkamp, Mary Alice Barnes 2013-1 20589 Amador Sierra Nevada Mountains: Fiddletown Road 12.7 miles northesat of its junction with Shake Ridge Rd. (Omo Ranch 7.5' Q.) 872 Comment
  SEINET1908777  Lupinus nanus G. K. Helmkamp, E. A. Helmkamp 2008-1 13463 Yuba Sierra Nevada Mountains Foothills: along CA-49, 0.1 mile north of the Nevada Co. line at Oregon Creek (Camptonville 7.5' Q) 466 Comment
  UCD109063  Lupinus nanus G. K. Helmkamp; E. A. Helmkamp 2006-5-11 10415 Nevada Northern Sierra Nevada Foothills: along CA Hwy 49, 2.1 mi. N of the South Yuba River bridge. 534 Comment
  UCR118263  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5507 Monterey Los Padres National Forest, Nacimiento Rd. (starts about 12 mi north of Gorda), 10.2 mi east of Calif. Hwy 1; at Sherlock Creek 595 Comment
  UCR161101  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2005-6-12 9660 San Luis Obispo South Central Coast Range, Along Calif. Highway 229 (road to Creston), 5.5 mi N of Calif. Highway 58; beside West Branch of Huerhuero Creek 363 Comment
  UCR161475  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2005-5-17 9479 San Luis Obispo Central Coast, 1.5 mi WNW of Piedras Blancas at Mile 64 of Calif. Highway 1 9 Comment
  UCR196884  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2008-5-15 13449 El Dorado Sierra Nevada Mountains, Pea Vine Ridge Road, 0.2 mile west of its junction with White Meadow Road, c. 4.8 miles west of the junction of White Meadow and Ice House roads 1155 Comment
  UCR207671  Lupinus nanus George K. Helmkamp, E. A. Helmkamp 2009-4-21 14532 El Dorado Sierra Nevada Mountains Foothills, Rock Creek Road, 4.2 miles west of the bridge over Rock Creek 401 Comment
  UCR250172  Lupinus nanus George K. Helmkamp, Mary Alice Barnes 2013-5-3 20484 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
  SBBG129009  Lupinus nanus G. K. Helmkamp, E. A. Helmkamp 2012-4-21 18812 Nevada junction of Lime Kiln Rd and Amberley Lane, 14.5 mi NNW (345 deg ) of Auburn 414 Comment
  SEINET269137  Lupinus nanus G. Helmkamp 1994-5-18 91 -4 San Luis Obispo Alamo Canyon 7 miles east of US 101 on CA 166 then 4 niles north (generally northeast of Twitchell reservoir) 213 Comment
  CAS-BOT-BC523894  Lupinus polyphyllus var. burkei George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20745 Nevada Northern Sierra Nevada Mountains Foothills: along Scotts Flat Road, 0.7 mi SW of its jct with CA-20, NE of Neevada City, NW of Scotts Flat Reservoir 1091 Comment
  UCD109453  Lupinus polyphyllus var. burkei G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11120 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
  UCR218258  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2010-7-23 16593 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
  UCR233686  Lupinus polyphyllus var. burkei George K. Helmkamp, E. A. Helmkamp 2010-8-26 16866 Nevada Northern Sierra Nevada Mountains, Eagle Lakes Road, about 0.5 mile west of its junction with Carlyle Road, 5.8 mi. NE (66 deg. ) of Emigrant Gap, N of I-80 1655 Comment
  UCR59784  Lupinus polyphyllus var. burkei 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
  UCR102936  Lupinus sparsiflorus George K. Helmkamp 1998-4-3 3091 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
  UCR218439  Lupinus stiversii George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16454 El Dorado Sierra Nevada Mountains, Silver Fork Road, 1.9 miles south of its junction with US-50 in Kyburz 1473 Comment
  UCR100790  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 1998-4-8 3190 Kern SW of Maricopa 1.7 mi NW of Calif. hwy 33 on Elkhorn Grade Rd. 396 Comment
  UCR161326  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2005-3-8 9062 San Luis Obispo Central Coast Hills, Prefumo Canyon, north side of Irish Hills; 3.0 mi west of Los Osos Valley Road 140 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
  UCR206551  Lupinus succulentus George K. Helmkamp, E. A. Helmkamp 2009-3-17 14400 Yolo Inner North Coast Ranges Foothills, along CA-20 and Cache Creek, 4.3 miles southeast of the Colusa County line 159 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
  UCR131360  Lupinus truncatus George K. Helmkamp, E. A. Helmkamp 1999-4-16 4673 San Diego Sweetwater River Drainage, Japatul Rd 1/2 mi SE of Loveland Reservoir. 488 Comment
  CAS-BOT-BC227441  Luzula comosa George K. Helmkamp; E. A. Helmkamp 2012-5-5 18937 Placer Northern Sierra Nevada Mountains Foothills: Todd Valley Road, 1.2 miles south of its junction with Foresthill Road 779 Comment
  UCR235482  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2012-5-5 18937 Placer Northern Sierra Nevada Mountains Foothills, Todd Valley Road, 1.2 miles south of its junction with Foresthill Road 779 Comment
  UCR235507  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2012-5-15 18964 Calaveras Northern Sierra Nevada Mountains Foothills, along Murray Creek Road (Murraydale Ln.), 1.4 miles east of Pope Road in San Andreas 387 Comment
  UCR246402  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2012-3-22 18631 Amador Northern Sierra Nevada Mountains Foothills, Bell Road, 1.2 miles east of CA-49 at private road to Rancho Cicada Retreat 371 Comment
  UCR248500  Luzula comosa George K. Helmkamp, E. A. Helmkamp 2012-5-31 19102 Calaveras Northern Sierra Nevada Mountains, Winton Road, 4.1 miles east of its junction with CA-26, NE of West Point 1072 Comment
  UCR114366  Luzula parviflora George K. Helmkamp, E. A. Helmkamp 1997-9-8 2279 Mono Sierra Nevada Mtns, south side of Lake Mary, south of Mammoth Lakes 2744 Comment
  GH403347  Lysimachia arvensis G. K. Helmkamp & E. A. Helmkamp 2010-5-4 15959 Unknown Sacramento Valley: NW edge of Vacaville, Vaca Valley Road, 0.1 mile west of its junction with Orchard Valley Road Comment
  SEINET2441184  Machaeranthera canescens subsp. canescens George K. Helmkamp, E. A. Helmkamp 2009-8-4 15370 Alpine Sierra Nevada Mountains. Along CA-4 at milepost 30, 1.6 miles south of its junction with CA-89, along East Fork Carson River. (Heenan Lake 7.5 Q.). 1787 Comment
  RSA511562  Machaeranthera canescens var. canescens George K. Helmkamp 1988-9-8 s.n. Mono Lundy Creek Campground #1, ca. 3 miles west of Highway 395 2226 Comment
  CLARK-A1045-1007  Machaeranthera tortifolia George K. Helmkamp 1977-4-24 Inyo Panamint Range south of Emigrant Pass; dry wash; ; Emigrant Pass 7.5'Q 1066 Comment
  UCR218245  Madia citriodora George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-2 16431 Placer Sierra Nevada Mountains Foothills, Yankee Jims Road on the east side of Yankee Jims Bridge over the North Fork American River, 5 mi. SE (146 deg. ) of Colfax 282 Comment
  SD132249  Madia elegans G. Helmkamp 1990-9-23 A 6 Lassen 3.0 miles east of Susanville, along State Road 36. 1340 Comment
  UCD134204  Madia elegans G. K. Helmkamp; E. A. Helmkamp 2007-6-6 12263 El Dorado Northern Sierra Nevada Mountains: along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road. 1616 Comment
  UCD134211  Madia elegans G. K. Helmkamp; E. A. Helmkamp 2007-9-4 12891 Amador Northern Sierra Nevada Mountains: Along CA-88 at Mile-49, 3.1 miles east of Hams Station. 1860 Comment
  UCR219191  Madia elegans subsp. densifolia George K. Helmkamp, E. A. Helmkamp 2009-9-22 15637 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  UCR230959  Madia elegans subsp. densifolia George K. Helmkamp, E. A. Helmkamp 2010-10-6 17003 Calaveras Northern Sierra Nevada Mountains Foothills, along CA-26 (Stephen P. Teale Hwy), 0.6 mile east of CA-49 at Mokelumne Hill 483 Comment
  UCR259012  Madia elegans subsp. elegans George K. Helmkamp, Amy Barnes 2014-9-16 23087 Alpine Eastern Sierra Nevada Mountains, Carson Valley, 1.35 mi. NE of Paynesville at junction of Fredericksburg Lane and US-88 (Carson Pass Hwy), 2.8 miles northeast of Woodfords 1340 Comment
  UCR193183  Madia exigua George K. Helmkamp, E. A. Helmkamp 2007-6-6 12264 El Dorado Northern Sierra Nevada Mountains, along Mormon Emigrant Trail, 8.3 miles east of its junction with Sly Park Road 1616 Comment
  UCR218444  Madia exigua George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16461 El Dorado Sierra Nevada Mountains, Silver Fork Road, 4.1 miles south of its junction with US-50 in Kyburz 1500 Comment
  UCR240933  Madia exigua George K. Helmkamp, E. A. Helmkamp 2012-6-26 19281 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 8.0 miles south of its junction with CA-88, along East Panther Creek 1345 Comment
  RSA0045149  Madia glomerata George K. Helmkamp, E. A. Helmkamp 2012-9-25 19919 Placer Laing Road, parallel to I-80; 0.2 mile east of its junction with Emigrant Gap Road. 1611 Comment
  UCD134262  Madia glomerata G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10943 El Dorado Northern Sierra Nevada Mtns. Mount Ralston Trail and Hwy. U.S.-50, about 0.9 mile south of Twin Bridges. 1960 Comment
  UCD134267  Madia glomerata G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12738 Amador Northern Sierra Nevada Mountains, along Hwy CA-88, 1.0 mile south of the junction with Mormon Emigrant Trail. 2172 Comment
  JEPS119434  Madia gracilis George K. Helmkamp, Ann Kerchner, Amy Barnes 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 Comment
  JEPS119468  Madia gracilis George K. Helmkamp with E. A. Helmkamp 2011-7-2 17623 El Dorado n SNF: Forni Road near Weber Creek, 0.8 mi south of its Placerville junction with US-50. Comment
  OBI82143  Madia gracilis George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 21096 El Dorado Northern Sierra Nevada Mountains; Hell's Delight Road, just west of the junction with Silver Fork Road, 2.8 miles north of CA-88. 2006 Comment
  UCR160733  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2005-6-5 9516 Monterey Central Coast, west edge of Santa Lucia Range, overlooking Pacific Ocean, 0.4 mi east of Calif. Hwy 1 along Los Burros Road 113 Comment
  UCR173286  Madia gracilis George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10466 El Dorado Northern Sierra Nevada Foothills, S side of Peavine Ridge; along Meadow Canyon Road, 3.4 mi. west of its junction with Ice House Canyon Road (N of US Hwy 50 and SSE of Union Valley Reservoir) 1189 Comment
  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
  UCR232276  Madia gracilis George K. Helmkamp, E. A. Helmkamp 2011-9-30 18362 Nevada Northern Sierra Nevada Mountains, small, open flat along CA-20, 2.6 miles west of its junction with Lowell Hill Road 1581 Comment
  CLARK-A1045-381  Madia minima George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains Keller Peak 7.5'Q Comment
  RSA794915  Madia rammii George K. Helmkamp, E. A. Helmkamp 2011-7-12 17704 Calaveras Winton Road, 6.7 miles east of its junction with CA-26 in West Point 1192 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
  VVC910  Malacothrix coulteri G. K. Helmkamp, E. A. Helmkamp 1998-4-9 3290 Kern Mojave Desert, W end of city of Mojave, along Airport Blvd. 808 Comment
  UCR89560  Malacothrix glabrata George K. Helmkamp 1994-3-10 42 7 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
  UCR233035  Malva parviflora George K. Helmkamp, E. A. Helmkamp 2011-5-12 17259 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
  UCR101002  Marah fabacea George K. Helmkamp, E. A. Helmkamp 1998-4-8 3239 San Luis Obispo Soda Lake Rd at Arrowbear Trail, vic. of California Valley, c. 5 mi. NW of Soda Lake 610 Comment
  UCR206541  Marah watsonii George K. Helmkamp, E. A. Helmkamp 2009-3-17 14399 Yolo Inner North Coast Ranges Foothills, along CA-20 and Cache Creek, 4.3 miles southeast of the Colusa County line 159 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
  UCR249931  Matricaria discoidea George K. Helmkamp 2013-3-9 20164 Sutter Northern Sancramento Valley, North Butte Road, 0.2 mile east of its junction with West Butte Road, NW foot of Sutter Buttes 26 Comment
  RSA0057870  Medicago lupulina George K. Helmkamp, E. A. Helmkamp 2013-11-9 22474 Calaveras Gwin Mine Road, 1.3 rd. miles north of Paloma Rd. at Paloma, 3.3 miles SW (242 deg air) of Mokelumne Hill 384 Comment
  UCR219686  Medicago lupulina George K. Helmkamp, E. A. Helmkamp 2009-11-3 15721 El Dorado Sierra Nevada Mountains Foothills, at a bridge on Grizzly Flat Road 8.0 miles east of its junction with Hwy E-16 at Somerset 925 Comment
  UCR231327  Medicago lupulina George K. Helmkamp, E. A. Helmkamp 2011-5-26 17397 Nevada Northern Sierra Nevada Mountains Foothills, southeast outskirts of of Grass Valley, Brunswick Road 0.2 mile northwest of the junction with Wood Rose Way 846 Comment
  SEINET13203265 Image available Medicago orbicularis George K. Helmkamp, Amy Barnes 2013-1 20234 Placer Eastern Sacramento Valley: NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 (Sheridan 7.5' Q.) 43 Comment
  UCR258125  Medicago orbicularis George K. Helmkamp, Amy Barnes 2014-3-21 22647 Placer Sacramento Valley, Sheridan, Riosa Road at the west side of its junction with old CA-65 33 Comment
  UCR258547  Medicago orbicularis George K. Helmkamp, Amy Barnes 2013-3-28 20234 Placer Eastern Sacramento Valley, NW edge of Sheridan, new section of Riosa Road, connecting new CA-65 with old CA-65 43 Comment
  UCR170976  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2006-3-26 10100 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; Chili Bar, at Calif. Highway 193 and the bridge over the South Fork of the American River 296 Comment
  UCR242764  Medicago polymorpha George K. Helmkamp, E. A. Helmkamp 2010-4-14 15850 Solano Northern San Joaquin Valley, Tremont Road, 0.8 mile west of Mace Blvd, 3.8 mi. (air) SE of Davis 3 Comment
  SD237447  Medicago praecox G. K. Helmkamp, E. A. Helmkamp 2012-4-30 18877 El Dorado Sierra Nevada Mountains Foothills: Mosquito Road, 0.3 mile north of the bridge over the South Fork American River (Slate Mountain 7.5'Q) 427 Comment
  UCR176417  Melica George K. Helmkamp, E. A. Helmkamp 2006-7-10 10883 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
  SEINET4142462 Image available Melica bulbosa George K. Helmkamp, E. A. Helmkamp 2012-5-3 18892 El Dorado Northern Sierra Nevada Mountain Foothills: Forebay Road, 7.0 mi. NW of Pollock Pines 748 Comment
  UCR249593  Melica harfordii George K. Helmkamp, Elizabeth Helmkamp 2013-6-11 20819 Placer Northern Sierra Nevada Mountains Foothills, Yankee Jim's Road, 3.6 miles northwest of its junction with Forest Hill Road 768 Comment
  UCR123180  Melica imperfecta George K. Helmkamp, E. A. Helmkamp 1998-5-19 3878 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR235394  Melica torreyana George K. Helmkamp, E. A. Helmkamp 2012-5-15 18999 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
  SD247429  Melilotus albus George Helmkamp, Elizabeth Helmkamp 2013-8-14 22179 Alpine Northern Sierra Nevada Mountains: along CA-89, 0.6 mile south of Markleeville (Markleeville 7.5'Q) 1691 Comment
  UCR234189  Melilotus albus George K. Helmkamp, E. A. Helmkamp 2010-9-23 16963 El Dorado Northern Sierra Nevada Mountains, Forest Route 31, 3.9 miles north of its junction with Peavine Ridge Rd and Round Tent Canyon Road 1457 Comment
  UCR253089  Melilotus albus George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22152 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 11.3 miles northeast of the town of Sutter Creek 582 Comment
  RSA0035707  Melilotus officinalis George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-14 22176 Alpine along CA-89, 0.6 mile south of Markleeville 1691 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
  RSA795086  Mentha arvensis George K. Helmkamp, E. A. Helmkamp 2011-9-1 18201 El Dorado Silver Fork Road, 0.9 miles south of its junction with US-50 in Kyburz 1280 Comment
  SD143865  Mentzelia involucrata G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2893 Imperial 4.7 miles N of Winterhaven on Picacho Road and 1 mile NW of the All-American Canal. Unnamed wash. 75 Comment
  UCR104031  Mentzelia involucrata George K. Helmkamp, E. A. Helmkamp 1998-2-18 2737 Riverside Sonoran (Colorado) Desert, Chuckwalla Mtns, 10.6 miles SSW of Chuckwalla Valley Rd. on Graham Pass Rd. 488 Comment
  UCR104844  Mentzelia involucrata George K. Helmkamp, E. A. Helmkamp 1998-2-5 2672 Riverside Little San Bernardino Mtns., 3.2 mi. north of junction of Thousand Palms Canyon Road and Dillon Road. 457 Comment
  SD143864  Mentzelia laevicaulis G. Helmkamp, E. Helmkamp 1997-9-9 2302 Alpine Junction of highways Ca-89 and Ca-4, south of Markleeville. 1798 Comment
  SD247451  Mentzelia laevicaulis George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22175 Alpine Northern Sierra Nevada Mountainss: along CA-89, 0.6 mile south of Markleeville (Markleeville 7.5'Q) 1691 Comment
  RSA518919  Mesembryanthemum elongatum George K. Helmkamp 1990-9-3 s.n. San Luis Obispo South end of Morro Bay, southwest of Baywood Park 15 Comment
  SD236412  Micranthes californica G. K. Helmkamp, E. A. Helmkamp 2008-6-3 13552 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
  UCR129983  Micropus californicus var. californicus George K. Helmkamp, E. A. Helmkamp 2000-4-24 5568 A Monterey Salinas Valley, 3.0 miles south of Lockwood on Tule Cyn [Interlake] Rd. 244 Comment
  UCR253532  Micropus californicus var. californicus George K. Helmkamp, Amy Barnes 2014-4-23 22796 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
  UCR258115  Mimulus George K. Helmkamp, Amy Barnes 2014-8-11 23016 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 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
  UCR122638  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 1998-5-19 3877 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR130738  Mimulus aurantiacus George K. Helmkamp, E. A. Helmkamp 1999-6-27 4940 Santa Clara San Francisco Bay Region, Sierra Azul, Mt.Umunhum Rd 1/2 mi from Hicks Rd., 1/2 mi west of Bald Mtn., 4 mi south of San Jose & 2 mi west of Almaden Reservoir 732 Comment
  UCR257061  Mimulus aurantiacus George K. Helmkamp, Mary Alice Barnes 2013-5-17 20612 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
  RSA0013380  Mimulus bicolor George K. Helmkamp, E. A. Helmkamp 2011-7-7 17631 El Dorado Park Creek Road, 0.4 mile east of its junction with (Co. Rd. E16) Sly Park Road, 1.4 mi. SE (111deg.) of Pollock Pines. 1290 Comment
  UCR217269  Mimulus bicolor George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16299 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
  CAS-BOT-BC520369  Mimulus bicolor George K. Helmkamp 2014-5-28 22933 Calaveras Northern Sierra Nevada Mountains: along Winton Rd along the N side of Wilson Lake 1127 Comment
  CLARK-A1045-820  Mimulus bigelovii George K. Helmkamp 1978-5-6 #1 San Bernardino Mesquite Mountains lime kilns; ; Clark Mt. 15'Q Comment
  RSA0047749  Mimulus guttatus George K. Helmkamp, Mary Alice Barnes 2013-4-18 20377 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
  UCR178757  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2006-9-20 11409 El Dorado Northern Sierra Nevada Mountains Foothills, Bridal Veil Falls [on Esmeralda Creek], along Hwy US-50 just east of Pacific 1002 Comment
  UCR219010  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2010-6-23 16338 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
  UCR230650  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2011-7-19 17826 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1367 Comment
  UCR241726  Mimulus guttatus George K. Helmkamp, E. A. Helmkamp 2012-9-25 19937 Nevada Northern Sierra Nevada Mountains, Bowman Lake Road, 0.1 mile south of the bridge over the South Fork Yuba River 1424 Comment
  RSA0012156  Mimulus jepsonii George K. Helmkamp, E. A. Helmkamp 2011-7-19 17828 Tuolumne Forest Route 5N14, 1.8 miles southeast of Boards Crossing bridge of North Fork Stanislaus River. 1367 Comment
  UCR197532  Mimulus layneae George K. Helmkamp, E. A. Helmkamp 2008-6-23 13708 Amador Northern Sierra Nevada Mountains, Dufrene Road, 0.1 mile south of its junction with CA-88, between Mormon Emigrant Trail and Hamms Station 2076 Comment
  RSA790109  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2011-7-26 17878 Nevada along CA Hwy 20, 0.8 mi. east of Bowman Lake Road, 1.23 mi. NE (50 deg.) of Emigrant Gap and 0.35 mi. N of I-80. 1541 Comment
  UCR240957  Mimulus moschatus George K. Helmkamp, E. A. Helmkamp 2012-9-25 19908 Placer Northern Sierra Nevada Mountains, Blue Canyon Road south of I-80 and 0.1 mile north of the Southern Pacific Railroad crossing 1451 Comment
  UCR18493  Mimulus nanus var. mephiticus George K. Helmkamp 1978-6-21 s.n. Mono 1.5 miles north of Whitmore along road to Hotcreek 2134 Comment
  UCR110957  Mimulus pilosus George K. Helmkamp 1998-6-27 4104 Riverside Santa Rosa Mtns., 3.3 miles south of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail, FS Rd. 7S02), in vicinity of an unnamed spring 1585 Comment
  UCR253101  Mimulus primuloides var. primuloides George K. Helmkamp, Belinda Pesheck 2013-7-14 21079 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  UCR188827  Minuartia californica George K. Helmkamp, E. A. Helmkamp 2007-3-23 11692 El Dorado Northern Sierra Nevada Mountains Foothills, hills bordering the east end of Sacramento Valley; Bass Lake Road at the southeast end of Bass Lake 381 Comment
  UCR122269  Minuartia douglasii George K. Helmkamp, E. A. Helmkamp 2002-4-15 7366 Santa Barbara Western Transverse Range, Sierra Madre Mountains, Miranda Pine Road, 1.0 mi southeast of CA Hwy 166 549 Comment
  CLARK-A1045-39  Mirabilis bigelovii var. retrorsa George K. Helmkamp 1977-4-23 Inyo Panamint Range west edge of Panamint Mountains; in a dry wash; ; Emigrant Pass 7.5' Q 1066 Comment
  HSC79251  Mirabilis laevis var. villosa G. K. Helmkamp 1984-5-2 - 24 Riverside Big Morongo Canyon, 3-3.5 mi. below the caretaker's house at the Big Morongo Preserve, Little San Bernardino Mtns. 550 Comment
  UCR253085  Monardella breweri subsp. lanceolata George K. Helmkamp, Elizabeth Helmkamp 2013-7-6 21001 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 1.3 miles east of Pebble Canyon Road, 25 mi. airline ESE (94 deg. ) of Placerville 1819 Comment
  SD248449  Monardella odoratissima George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20914 El Dorado Northern Sierra Nevada Mountains: Silver Fork Road, north side of its junction with Mormon Emigrant Trail (Tragedy Spring 7.5'Q) 2188 Comment
  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
  UCD125215  Monardella odoratissima subsp. pallida G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11112 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
  UCD125218  Monardella odoratissima subsp. pallida G. K. Helmkamp; E. A. Helmkamp 2007-7-7 12504 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 12.0 miles south of its junction with CA-88. 2549 Comment
  UCD125219  Monardella odoratissima subsp. pallida G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12547 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, ca. 9 miles south of its junction with CA-88. 2511 Comment
  UCR175737  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2006-7-31 11066 El Dorado Northern Sierra Nevada Mountains, along Wrights Lake Road (Forest Route 4), 3.3 miles north of Hwy US-50 2049 Comment
  UCR216046  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2009-7-30 15352 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR219050  Monardella odoratissima subsp. pallida George K. Helmkamp, E. A. Helmkamp 2010-7-13 16518 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  UCR252795  Monardella odoratissima subsp. pallida George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22100 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 Comment
  CAS-BOT-BC220475  Monardella sheltonii G. K. Helmkamp; E. A. Helmkamp 2007-5-30 12206 Placer Northern Sierra Nevada Mountains Foothills: Mosquito Ridge Road, 8.5 miles east of its junction with Forest Hill Road in Foresthill 488 Comment
  SD237508  Monardella sheltonii G. K. Helmkamp, E. A. Helmkamp 2009-6-29 15058 El Dorado Sierra Nevada Mountains Foothills: Ice House Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83a^z) of Pollock Pines. 989 Comment
  CLARK-A1045-1336  Monardella undulata George K. Helmkamp 1977-7-4 San Luis Obispo Los Osos vacant lot; ; Morro Bay S 7.5'Q 30 Comment
  UCR123939  Monolepis nuttalliana George K. Helmkamp, E. A. Helmkamp 2001-4-27 6545 Kern San Joaquin Valley, Enos Lane Rd., 1.9 mi south of Calif. Hwy 119, NE of Taft 61 Comment
  UCR104835  Monoptilon bellioides George K. Helmkamp 1998-4-4 3165 Riverside Sonoran (Colorado) Desert, 7.1 miles north of Hwy I-10 on Eagle Mtn Rd, to the vicinity of the pumping station 305 Comment
  UCR122934  Monoptilon bellioides George K. Helmkamp, E. A. Helmkamp 2001-3-30 6415 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 Comment
  UCR124180  Montia chamissoi George K. Helmkamp, E. A. Helmkamp 1998-8-12 4375 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR234640  Montia linearis George K. Helmkamp, E. A. Helmkamp 2011-8-19 18109 Alpine Northern Sierra Nevada Mountains, Tamarack Road, 1.2 miles east of its junction with Blue Lakes Road 2451 Comment
  UCR233328  Muhlenbergia andina George K. Helmkamp, E. A. Helmkamp 2011-9-1 18229 El Dorado Northern Sierra Nevada Mountains, Silver Fork Road, 3.1 miles north of its junction with the Mormon Emigrant Trail 1523 Comment
  RSA750322  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2008-8-1 13950 El Dorado Wright's Lake Road, 2.2 miles south of the entrance to Wright's Lake 2070 Comment
  SEINET13276720 Image available Muhlenbergia filiformis George K. Helmkamp, Amy Barnes 2012-1 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 Reservior (Robbs Peak 7.5' Q.) 1756 Comment
  UCR191126  Muhlenbergia filiformis George K. Helmkamp, E. A. Helmkamp 2007-8-16 12768 Amador Northern Sierra Nevada Mountains, along the south side of Bear River Reservoir just east of the spillway 1777 Comment
  UCR206337  Myosotis laxa George K. Helmkamp, E. A. Helmkamp 2009-6-14 15024 B 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
  UCR229451  Myosotis laxa George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18067 Alpine Northern Sierra Nevada Mountains, south side of Bear Valley Village, along CA Hwy 4 2169 Comment
  CLARK-A1045-527  Myosurus aristatus George K. Helmkamp 1979-6-22 San Bernardino San Bernardino Mountains north of Forest Service road 3N08, .8 mile east of Van Dusen Canyon Road; drying pool; Big Bear City 7.5'Q Comment
  SD224992  Nama demissa var. demissa G. K. Helmkamp 1998-3-30 3046 San Bernardino Mojave Desert: vicinity of Twentynine Palms; Encelia Rd, 1.0 mi. N of CA hwy 62. 792 Comment
  UCR101132  Nama demissa var. demissa George K. Helmkamp, E. A. Helmkamp 1998-3-19 2950 Imperial Sonoran (Colorado) Desert, Little Picacho Wash along Picacho Rd, 2.5 mi. south of Picacho State Recreation Area 152 Comment
  UCR122587  Navarretia hamata subsp. leptantha George K. Helmkamp 1995-11-23 108 San Luis Obispo Central Coast, Junction of Martingale Avenue and Buckskin Drive in Los Osos 46 Comment
  SBBG127565  Navarretia leptalea subsp. leptalea G. K. Helmkamp, E. A. Helmkamp 2009-7-22 15267 El Dorado Wrights Lake Rd, 1.2 mi S of Wrights Lake 2073 Comment
  SD243177  Navarretia leptalea subsp. leptalea George K. Helmkamp, E. A. Helmkamp 2010-7-28 16667 Placer Northern Sierra Nevada Mountains: Forest Hill Road, 1.6 miles west of the junction with Soda Springs road at Robinson Flat. Roadside. 2040 Comment
  SEINET11261852  Navarretia leucocephala George Helmkamp, E. A. Helmkamp 2011-7-26 17873 Nevada Northern Sierra Nevada Mountains: along CA Hwy 20, .8 mi east of Bowman Lake Road, 1.23 mi. NE (501/4) of Emigrant Gap and .35 mi. N of I-80 (Blue Canyon 7.5 Q.); 0 1541 Comment
  UCR198536  Navarretia leucocephala subsp. leucocephala George K. Helmkamp, E. A. Helmkamp 2008-4-17 13287 Placer Sacramento Valley, Ranch House Road, 0.2 mile southeast of Sheridan 37 Comment
  UCR121584  Navarretia squarrosa George K. Helmkamp, E. A. Helmkamp 1999-6-28 4985 San Mateo Pescadero Creek Watershed, Pescadero Road just north of Loma Mar 107 Comment
  UCR41594  Nemacladus longiflorus var. breviflorus George K. Helmkamp 1986-4-5 734 San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, Morongo Valley, NE end of the Nature Conservancy Preserve, along the Desert Wash Trail 823 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
  UCR198491  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2008-5-4 13385 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
  UCR206343  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2009-5-19 14717 El Dorado Sierra Nevada Mountains Foothills, Happy Valley Road, 0.2 miles west of its junction with Happy Valley Cutoff road 561 Comment
  UCR235601  Nemophila heterophylla George K. Helmkamp, E. A. Helmkamp 2012-4-27 18862 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road north of Placerville, at south side of the crossing of the South Fork American River 401 Comment
  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
  UCR218259  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 2127 Comment
  UCR97578  Nemophila menziesii George K. Helmkamp, E. A. Helmkamp 1997-3-8 1411 San Luis Obispo Inner Coast Range, Carrizo Plain; 30.1 mi. NW of Calif. Hwy 166 on Soda Lake Rd., at San Diego Creek Rd near edge of Soda Lake 610 Comment
  UCR106420  Nemophila menziesii var. menziesii George K. Helmkamp, A. C. Sanders 1997-3-15 1489 Riverside Skinner Lake, Grassland at base of Bachelor Mtn. and adjoining chapararal. 488 Comment
  UCR185229  Nemophila menziesii var. menziesii George K. Helmkamp, E. A. Helmkamp 2007-4-23 11791 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
  UCR256506  Nemophila parviflora George K. Helmkamp, Amy Barnes 2014-5-8 22851 Amador Sacramento Valley/Sierra Nevada Foothills, along CA-104, 1.2 miles southeast of Ione 146 Comment
  UCR256983  Nemophila parviflora George K. Helmkamp 2014-5-17 22895 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
  SD197799  Nemophila parviflora var. parviflora G. K. Helmkamp, E. A. Helmkamp 2007-4-30 11885 El Dorado Northern Sierra Nevada Mountains: hiking trail leaving CA-49, 3.4 miles northwest of Placerville. 511 Comment
  SD241048  Nemophila parviflora var. parviflora George K. Helmkamp, E. A. Helmkamp 2010-6-23 16340 Amador Northern Sierra Nevada Mountains Foothills: Sutter Creek Road, 7.2 miles northeast of its junction with old CA-49 in Sutter Creek village (Pine Grove 7.5'Q) 473 Comment
  SD241050  Nemophila pulchella var. fremontii George K. Helmkamp, E. A. Helmkamp 2011-4-12 17177 El Dorado Northern Sierra Nevada Mountains Foothills: Placerville, along Forni Road 0.2 mile northwest of its Weber Creek crossing, SE of Hwy 50 near Diamond Springs (Placerville 7.5'Q) 487 Comment
  UCR222894  Nemophila pulchella var. fremontii George K. Helmkamp, E. A. Helmkamp 2010-4-17 15901 Placer Sierra Nevada Mountains Foothills, along CA-49, 2.5 miles southeast of Pilot Hill 271 Comment
  UCR198563  Nemophila pulchella var. gracilis George K. Helmkamp, E. A. Helmkamp 2008-3-12 13168 Amador Sierra Nevada Mountains Foothills, Middle Bar Road, 3.7 miles south of its junction with CA-49 just south of Jackson 345 Comment
  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
  RSA489395  Nicotiana obtusifolia George K. Helmkamp 1988-2-28 s.n. Imperial At end of dirt road ca. 2 miles WSW of Crucifixion Thorn Natural Area, SE of Ocotillo and SW of Hwy 98. [10 km cell; PG-1N, 0E] 152 Comment
  CLARK-A1045-307  Nicotiana trigonophylla George K. Helmkamp 1977-3-20 Riverside Deep Canyon Pinyon Pines area; ; ; Palm Desert 15'Q 1066 Comment
  UCR130626  Notholithocarpus densiflorus George K. Helmkamp, E. A. Helmkamp 1999-5-21 4863 Monterey Santa Lucia Mountains, Willow Creek Road, 6.3 mi east of Calif. Hwy 1 north of Gorda 1037 Comment
  UCR61719  Notholithocarpus densiflorus 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
  UCR122654  Oenothera cespitosa subsp. marginata George K. Helmkamp, E. A. Helmkamp 1998-3-16 2850 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
  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
  UCR102985  Oenothera deltoides var. deltoides George K. Helmkamp 1998-3-30 3014 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR217896  Oenothera elata subsp. hirsutissima George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16448 El Dorado Sierra Nevada Mountains, Silver Fork road, at the junction with US-50 in Kyburz 1328 Comment
  UCR245589  Oenothera villosa subsp. strigosa George K. Helmkamp, Amy Barnes 2013-9-24 22359 Calaveras Northern Sierra Nevada Mountains, SE side of White Pines Reservoir, 0.6 mile NE of Arnold 1184 Comment
  SBBG103900  Oligomeris linifolia G. K. Helmkamp 1993-4-24 San Bernardino Smith Talc Rd, ca. 9 mi E of Tecopa Pass 762 Comment
  UCR67387  Orthilia secunda George K. Helmkamp 1990-8-2 s.n. Mono Eastern Sierra Nevada Mountains, between Mammoth and Lake Mary 2591 Comment
  UCR232184  Oryza sativa George K. Helmkamp, E. A. Helmkamp 2011-10-8 18392 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
  SEINET3244044 Image available Oryzopsis hymenoides G. Helmkamp 1993-1 23 -3 San Bernardino Dry slope along the edge of Burns Canyon. 1372 Comment
  CLARK-A1045-919  Oryzopsis miliacea George K. Helmkamp 1977-8-11 Ventura Port Hueneme 246 East A Street; in empty lot beside this address; Oxnard 7.5'Q Comment
  RSA0012132  Osmorhiza berteroi George K. Helmkamp, E. Helmkamp 2011-7-7 17636 El Dorado Park Creek Road, 0.4 mile east of its junction with (Co. Rd. E16) Sly Park Road, 1.4 mi. SE (111 deg ) of Pollock Pines 1290 Comment
  UCR222527  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2010-6-5 16250 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
  UCR230614  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2011-7-19 17835 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  UCR237360  Osmorhiza chilensis George K. Helmkamp, E. A. Helmkamp 2012-6-13 19203 Nevada Northern Sierra Nevada Mountains Foothills, Maybert Road along South Yuba River, 0.6 mi. northeast of the river bridge at Washington 796 Comment
  UCR57536  Osmorhiza chilensis George K. Helmkamp 1989-8-1 s.n. Mono Sierra Nevada Mtns., West Walker River, at Hwy 395, 4 mi. south of Walker 1890 Comment
  UCR219831  Oxalis corniculata George K. Helmkamp, E. A. Helmkamp 2009-11-12 15737 El Dorado Sierra Nevada Mountains Foothills, Lake Oaks Mobile Home Park including Patterson Lake; Diamond Springs 521 Comment
  UCR123162  Oxalis corniculata subsp. pilosa George K. Helmkamp, E. A. Helmkamp 2002-4-16 7404 San Luis Obispo Central Coast, Park Ridge 0.5 mi east of Morro Bay near Turri Road 76 Comment
  RSA714094  Oxalis pes-caprae George K. Helmkamp 2003-12-18 8230 San Luis Obispo Arroyo Grande, Courtland Ave. one block S of Grand Ave. Brooklyn Creek, opposite San Francisco. 15 Comment
  UCR132124  Oxalis rubra George K. Helmkamp, E. A. Helmkamp 2000-6-18 5724 Mendocino North Coast, Glass Beach, Fort Bragg 9 Comment
  CLARK-A1045-8  Oxytheca perfoliata George K. Helmkamp 1977-4-21 San Bernardino 7 miles north of Adelanto; east of U.S. 395; ; Victorville Northwest 7.5' Q 883 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
  UCR102996  Palafoxia arida var. arida George K. Helmkamp 1998-3-30 3009 San Bernardino Mojave Desert, Dale Dry Lake, east of Twentynine Palms; along Iron Age Rd, 4.2 mi. SE of Amboy Rd. 366 Comment
  UCR118296  Palafoxia arida var. arida George K. Helmkamp, E. A. Helmkamp 1998-4-19 3368 San Bernardino Mojave Desert, northwest side of East Cronese Lake, about 15 miles west of Baker 335 Comment
  CDA25209  Panicum capillare G. K. Helmkamp, E. A. Helmkamp 2007-10-13 13095 San Joaquin Northern San Joaquin Valley; Along Highway CA-88, 1.0 mile southwest of Clements at Disch Road. Comment
  UCR181951  Panicum capillare George K. Helmkamp, E. A. Helmkamp 2006-10-8 11495 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
  UCR201937  Panicum capillare George K. Helmkamp, E. A. Helmkamp 2008-10-6 14204 Yuba Sacramento Valley, junction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst 24 Comment
  UCR247243  Panicum capillare George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22170 Alpine Northern Sierra Nevada Mountains, along CA-89, 0.6 mile south of Markleeville 1691 Comment
  UCR257556  Papaver rhoeas George K. Helmkamp, Mary Alice Barnes 2013-5-13 20604 Amador Sierra Nevada Mountains, in the town of Pioneer, 0.1 mile west of Pioneer Creek Road along Hwy 88/Carson Pass Hwy 902 Comment
  UCR231023  Parentucellia viscosa George K. Helmkamp, E. A. Helmkamp 2011-6-22 17614 Amador Northern Sierra Nevada Mountains Foothills, Sutter-Ione Road, 2.2 miles west of its junction with CA-49 313 Comment
  UCR233194B  Parvisedum pumilum George K. Helmkamp, E. A. Helmkamp 2010-4-7 15843 Amador Northeast San Joaquin Valley, along CA-88, 0.9 mile northeast of the San Joaquin County line 84 Comment
  UCR170418  Paspalum dilatatum George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10025 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
  UCR170430  Paspalum dilatatum George K. Helmkamp, Elizabeth Helmkamp 2005-10-29 10004 B El Dorado Northern Sierra Nevada Foothills, [E of Sacramento, 3 air mi N of Placerville]; 1.9 [road] mi east of Calif. Highway 193 along Rock Creek Road 381 Comment
  UCR232673  Paspalum dilatatum George K. Helmkamp, E. A. Helmkamp 2011-10-15 18437 San Joaquin San Joaquin Valley, along CA-26, 0.6 mile northeast of Escalon-Bellota Rd. 40 Comment
  UCR253537  Paspalum dilatatum George K. Helmkamp, Amy Barnes 2013-9-23 22308 Calaveras Sierra Nevada Mountains Foothills, Utica Powerhouse Road (beside Angel's Creek), 0.6 mile northeast of its junction with CA-4 974 Comment
  UCR259868  Paspalum dilatatum George K. Helmkamp, Elizabeth Helmkamp 2013-11-2 22469 Placer Sacramento Valley, West Wise Road just east of the junction with California Lane, north of Lincoln 56 Comment
  UCR104008  Pectocarya platycarpa George K. Helmkamp 1998-4-4 3100 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
  CLARK-A1045-298  Pectocarya recurvata George K. Helmkamp 1977-3-20 Riverside Deep Canyon dry wash of Deep canyon; ; Palm Desert 15'Q Comment
  UCR140458  Pellaea andromedifolia George K. Helmkamp 2004-4-21 8465 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR160383  Pellaea andromedifolia George K. Helmkamp, E. A. Helmkamp 2005-6-9 9619 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
  RSA0049803  Pellaea bridgesii George K. Helmkamp, E. A. Helmkamp 2012-7-6 19339 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
  UCR122741  Penstemon centranthifolius George K. Helmkamp, E. A. Helmkamp 1998-4-24 3380 Riverside Santa Rosa Mountains, Pinyon Pines along Calif. Hwy 74 between the San Jacinto and Santa Rosa Mountains 1296 Comment
  UCR130706  Penstemon centranthifolius George K. Helmkamp, E. A. Helmkamp 1998-6-27 4070 Riverside San Jacinto Mtns., Garner Valley, along Hwy 74 at Morris Ranch Rd. 1372 Comment
  UCR15396  Penstemon eatonii George K. Helmkamp 1977-5-30 s.n. San Bernardino Eastern Mojave Desert, Granite Mtns above Cottonwood Springs Comment
  CLARK-A1045-950  Penstemon grinnellii subsp. scrophularioides George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5'Q Comment
  UCR102604  Penstemon heterodoxus var. heterodoxus George K. Helmkamp, E. A. Helmkamp 1997-9-11 2365 Mono Sierra Nevada Mtns., along Calif. Hwy 120, 0.5 mile north of Tioga Pass, Nunatak Meadow area 2957 Comment
  CLARK-A1045-1001  Penstemon incertus George K. Helmkamp 1977-6-12 Tulare Kern River along the River, 3 miles north of the Kern/Tulare County line; Kernville 7.5'Q Comment
  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
  SD241192  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17913 El Dorado Northern Sierra Nevada Mountains: Omo Ranch Road at the junction with North-South Road, 0.67 miles NW (300a^z) of junction with Hwy-88; 8.9 miles southeast of Omo Ranch Caldor 7.5'Q) 1456 Comment
  UCR229580  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-7-30 17913 El Dorado Northern Sierra Nevada Mountains, Omo Ranch Road at the junction with North-South Road, 0.67 mi. NW (300 deg. ) of jct. with Hwy 88; 8.9 miles southeast of Omo Ranch 1457 Comment
  UCR242803  Penstemon laetus subsp. laetus George K. Helmkamp, E. A. Helmkamp 2011-6-17 17590 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
  UCR197824  Penstemon newberryi var. newberryi George K. Helmkamp, E. A. Helmkamp 2008-7-16 13845 Alpine Northern Sierra Nevada Mountains, 0.1 mile south of CA-88 on a dead-end spur south of Carson Pass 2595 Comment
  UCR130988  Penstemon palmeri George K. Helmkamp, E. A. Helmkamp 1998-5-3 3524 San Bernardino Eastern Mojave Desert, Mesquite Mtns, 3 mi. west of the Nevada border at Sandy Valley 1067 Comment
  RSA715282  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2006-6-19 10768 El Dorado Northern Sierra Nevada Mountains: about 1.3 miles north of Hwy US-50 on Wright's Lake Road 1677 Comment
  RSA739789  Penstemon roezlii George K. Helmkamp 2007-6-29 12431 Amador Sandy Cove picnic area southeast of CA-88 beside the west edge of Silver Lake 2244 Comment
  SD236427  Penstemon roezlii G. K. Helmkamp 2006-6-19 10768 El Dorado Northern Sierra Nevada Mountains: about 1.3 miles north of Hwy US-50 on Wright's Lake Road 1677 Comment
  UCR209752  Penstemon roezlii George K. Helmkamp, E. A. Helmkamp 2009-8-12 15443 Placer Sierra Nevada Mountains, Forest Hill Road, 0.8 mile west of Robinson Flat, c. 27 miles NE of the city of Foresthill 2034 Comment
  UCR253114  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
  RSA739785  Penstemon rydbergii var. oreocharis George K. Helmkamp 2007-6-29 12440 Amador Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  SD243213  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2011-8-19 18099 Alpine Northern Sierra Nevada Mountains: Blue Lakes Road, 6.6 miles south of its junction with CA-88. Large meadow. 2296 Comment
  SEINET3260377 Image available Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 2008-8-8 14005 Alpine Northern Sierra Nevada Mountains; along Blue Lake Road, 9.2 miles south of its junction with CA-88. 2512 Comment
  UCR103820  Penstemon rydbergii var. oreocharis George K. Helmkamp, E. A. Helmkamp 1997-9-11 2400 Alpine Sierra Nevada Mountains, 0.2 mi northwest of Sonora Pass along CA Hwy 108 2912 Comment
  UCR219677  Penstemon rydbergii var. oreocharis George K. Helmkamp, Amy Barnes, Ann Kerchner 2010-7-19 16581 El Dorado Northern Sierra Nevada Mountains, southernmost point of Wright's Lake, 5.6 mi. NE (33 deg. ) of Kyburz 2085 Comment
  UCR250341  Pentagramma pallida George K. Helmkamp, Mary Alice Barnes 2013-4-18 20368 Placer Northern Sierra Nevada Mtns Foothills, Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar 512 Comment
  UCD137740  Pentagramma triangularis G. K. Helmkamp; E. A. Helmkamp 2006-3-26 10111 El Dorado Northern Sierra Nevada Foothills: ENE of Sacramento; Rock Creek Road, 1.4 miles east of CA Highway 193 (generally east of Chili Bar). 428 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
  UCR123207  Pentagramma triangularis subsp. triangularis George K. Helmkamp, E. A. Helmkamp 2001-5-29 6717 San Benito South Coast Range, Gabilan Range, 7.1 mi. south of San Juan Bautista on Hwy G-1 488 Comment
  UCD127884  Perideridia lemmonii G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12513 Amador Northern Sierra Nevada Mountains: along CA-88, 0.7 mile north of its junction with Mormon Emigrant Trail; Shot Rock trailhead. 2325 Comment
  UCR234624  Perideridia lemmonii George K. Helmkamp, E. A. Helmkamp 2011-8-19 18114 Alpine Northern Sierra Nevada Mountains, Tamarack Road, 0.1 mile east of its junction with Blue Lakes Road 2485 Comment
  UCR252799  Perideridia lemmonii George K. Helmkamp, Elizabeth Helmkamp 2013-8-2 22091 Alpine Northern Sierra Nevada Mountains, along CA-88, Carson Pass Hwy, 1.6 miles east of the Caples Lake dam 2486 Comment
  SD212457  Perideridia parishii G. K. Helmkamp, Elizabeth Helmkamp 2005-9-23 9929 El Dorado Northern Sierra Nevada Mountains; Wright's Lake Tie Road, 1.0 mile west of its junction with Wright's Lake Road. 2043 Comment
  RSA0013390  Perideridia parishii subsp. latifolia George K. Helmkamp, E. 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
  UCR122959  Perityle emoryi George K. Helmkamp, E. A. Helmkamp 2001-3-30 6426 San Bernardino Eastern Mojave Desert, US-95, 8.5 mi south of I-40. 351 Comment
  SD236379  Persicaria hydropiper G. K. Helmkamp, E. A. Helmkamp 2006-10-10 11528 Yuba Northern Sierra Nevada Mountains Foothills: along Hwy Ca-49 just north of Nevaday county line at the Middle Yuba River Bridge. 451 Comment
  UCR250351  Petrorhagia dubia George K. Helmkamp, Mary Alice Barnes 2013-4-18 20357 Placer Northern Sierra Nevada Mtns Foothills, Yankee Jim Road, 2.4 miles east of its junction with Canyon Way, 2.5 mi. ENE (78 deg. ) of Weimar 512 Comment
  HSC79024  Phacelia campanularia G. K. Helmkamp 1984-4-29 - 38 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
  CLARK-A1045-1333  Phacelia cicutaria subsp. hispida George K. Helmkamp 1978-4-22 San Luis Obispo Los Padres National Forest Cerro Alto Camground; Atascadero 7.5'Q Comment
  SD148139  Phacelia ciliata G. K. Helmkamp, E. A. Helmkamp 2001-4-27 6537 Kern Enos Lane Road, 1.9 mile south of CA-119, northeast sof Taft. 60 Comment
  UCR97539  Phacelia ciliata George K. Helmkamp, E. A. Helmkamp 1997-3-8 1408 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
  CLARK-A1045-428  Phacelia curvipes George K. Helmkamp 1979-6-5 #5 San Bernardino San Bernardino Mountains 1.5 miles east of fawnskin; dry slope under pines; ; Fawnskin 7.5'Q 2133 Comment
  SD143846  Phacelia distans G. K. Helmkamp, E. A. Helmkamp 1998-4-8 3250 Kern 2.3 miles northeast of Cerro Noroeste Road along CA Highway 33, southwest of Maricopa. 793 Comment
  UCR104063  Phacelia distans George K. Helmkamp 1998-4-4 3104 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
  UCR163770  Phacelia distans George K. Helmkamp, E. A. Helmkamp 2005-3-31 9281 Santa Barbara Outer South Coast Ranges, San Rafael Mountains. 14.0 mi NE of Los Olivos along Figueroa Mountain Road 1000 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
  CLARK-A1045-1235  Phacelia gymnoclada George K. Helmkamp 1979-6-12 Mono Owens River drying alkaline mud flat, 4.5 miles south of Arcularius Ranch; Whitmore Hot Springs 7.5'Q Comment
  UCD120477  Phacelia hastata subsp. hastata G. 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
  UCD120486  Phacelia hastata subsp. hastata G. K. Helmkamp; E. A. Helmkamp 2007-8-16 12752 Amador Northern Sierra Nevada Mountains: along Hwy CA-88, 3.5 miles south of its junction with Mormon Emigrant Trail. Comment
  RSA781286  Phacelia hastata var. compacta George K. Helmkamp, E. A. Helmkamp 2009-6-29 15057 El Dorado Ice House Road, 0.2 miles north of its junction with CA-50, c. 7.3 miles ENE (83 deg ) of Pollock Pines 989 Comment
  SEINET1908459  Phacelia hastata var. compacta G. K. Helmkamp, E. A. Helmkamp 2008-1 13614 El Dorado Sierra Nevada Mountains Foothills: Forbay Road. 0.5 mile north of its crossing of the South Fork American River. 668 Comment
  UCR60015  Phacelia hastata var. compacta George K. Helmkamp 1988-9-7 s.n. Mono Eastern Sierra Nevada Mountains, Hwy 395, 29 miles north of Inyo Co. line 2195 Comment
  SD234890  Phacelia hastata var. hastata G. K. Helmkamp, E. A. Helmkamp 2007-6-6 12282 El Dorado Northern Sierra Nevada Mountains: Bonetti Road, 3.2 miles south of its junction with Mormon Emigrant Trail, east of Jenkinson Lake and near Diamond Creek. 1189 Comment
  SEINET4560892  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2011-1 17509 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
  UCR189910  Phacelia hastata var. hastata George K. Helmkamp, E. A. Helmkamp 2007-8-9 12725 El Dorado Northern Sierra Nevada Mountains, Wright's Lake Road, 1.1 miles south of the lake 2113 Comment
  UCR249989  Phacelia hastata var. hastata George K. Helmkamp, Elizabeth Helmkamp 2013-6-19 20934 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
  UCR253091  Phacelia hydrophylloides George K. Helmkamp, Belinda Pesheck 2013-7-14 21067 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road 2468 Comment
  UCR121782  Phacelia imbricata George K. Helmkamp, E. A. Helmkamp 2000-4-21 5451 San Luis Obispo Santa Lucia Range, Santa Rosa Creek Road, 5.6 mi east of Cambria 76 Comment
  UCR26643  Phacelia inyoensis George K. Helmkamp 1982-7-1 s.n. Mono Owens Valley, along the Owens River at Arcularius Ranch 2149 Comment
Read comments
May 31 2011
  CLARK-A1045-1044  Phacelia leucophylla George K. Helmkamp 1977-7-3 Mono Long Valley corner of US Highway 395 and Owens River Road; disturbed soil; ; ; Old Mammoth 7.5'Q 2194 Comment
  UCR121462  Phacelia marcescens George K. Helmkamp 1999-6-30 5103 Nevada Northern Sierra Nevada Range, Truckee, 1-2 mi. east of Donner Lake. 1540 Comment
  UCR218438  Phacelia mutabilis George K. Helmkamp, Mary Alice Barnes & Mary Jane Ganibe 2010-7-6 16453 El Dorado Sierra Nevada Mountains, Silver Fork Road, 1.9 miles south of its junction with US-50 in Kyburz 1473 Comment
  UCR242337  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 2232 Comment
  SD225001  Phacelia parryi G. K. Helmkamp 1998-4-3 3063 Riverside Whitewater River, bordering the N side of Hwy I-10; E side of the river. 395 Comment
  UCR230624  Phacelia quickii George K. Helmkamp, E. A. Helmkamp 2011-7-19 17839 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  RSA0047364  Phacelia racemosa George K. Helmkamp, E. A. Helmkamp 2012-6-19 19239 Placer Foresthill Road, 9.2 miles east of its junction with Devil s Thumb Road 2055 Comment
  SD247445  Phacelia racemosa George K. Helmkamp, E. A. Helmkamp 2012-6-19 19239 Placer Northern Sierra Nevada Mountains: Foresterhill Road, 9.2 miles east of its junction with Devil's Thumb Road (Duncan Peak 7.5'Q) 2054 Comment
  UCR158564  Phacelia ramosissima var. montereyensis George K. Helmkamp 2004-6-15 8636 San Luis Obispo Central Coast, Between Oso Flaco Lake and the Pacific Ocean, c. 0.3 mi WNW of the lake 9 Comment
  SD225002  Phacelia ramosissima var. subglabra G. K. Helmkamp 1997-9-30 2505 Inyo Sierra Nevada Mountains; Lone Pine Crk. 2286 Comment
  UCR248480  Phacelia ramosissima var. subglabra George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 22016 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
  CLARK-A1045-845  Phacelia rotundifolia George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains limestone [slope?]; Clark Mt. 15'Q Comment
  UCR122560  Phacelia tanacetifolia George K. Helmkamp, E. A. Helmkamp 2001-4-27 6558 Kern Temblor Range, CA Hwy 58, 1.1 mi SW of the San Luis Obispo Co. line 793 Comment
  UCR122576  Phacelia vallis-mortae George K. Helmkamp, E. A. Helmkamp 2001-3-24 6310 San Bernardino Southcentral Mojave Desert, 0.3 mile west of CA Hwy 247 on Pipes Canyon Road 1037 Comment
  UCR96265  Phalaris aquatica George K. Helmkamp 1996-9-22 1196 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  SD212643  Philadelphus lewisii G. K. Helmkamp, Elizabeth A. Helmkamp 2006-6-14 10705 Placer 0.2 mile north of Forest Hill Road on unnamed road to Lake Clementine. 487 Comment
  UCD117280  Philadelphus lewisii G. K. Helmkamp; E. A. Helmkamp 2006-6-29 10777 Calaveras Northern Sierra Nevada: Along Hwy CA-26, 12.3 miles E of the Mokelumne Hill turnoff from Hwy CA-49. 640 Comment
  UCR173737  Philadelphus lewisii George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-14 10705 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
  UC2015567  Phleum alpinum G. Helmkamp 1995-9-23 3 -30 Alpine West side of Sonora Pass just beyond the Mono County line. Comment
  SEINET9258994  Phleum pratense George K. Helmkamp, Elizabeth Helmkamp 2013-1 20998 Amador Northern Sierra Nevada Mountains: Bear River Road, 1.5 road miles east of the dam for Lower Bear River Reservoir 1836 Comment
  UCR110970  Phlox austromontana George K. Helmkamp 1998-6-27 4107 Riverside Santa Rosa Mtns., 5.8 mi SE of Hwy 74 along Santa Rosa Mtn Rd. (= Santa Rosa Truck Trail = F. S. Rd. 7S02), below Mountain Home Spring 1799 Comment
  UCD118300  Phlox condensata G. K. Helmkamp 2007-7-7 12493 Alpine Northern Sierra Nevada Mountains: Blue Lake Road, 0.2 mile south of its junction with CA-88. 2200 Comment
  UCR14518  Phlox condensata George K. Helmkamp 1974-6-9 s.n. Mono Eastern Sierra/Owens Valley, Benton Crossing on Owens River 2134 Comment
  RSA756756  Phlox diffusa George K. Helmkamp, Ann Kerchner 2009-7-25 15300 Alpine Blue Lakes Road, 8.5 miles south of its junction with CA-88 2491 Comment
  UCR101007  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 1998-4-8 3243 San Luis Obispo Soda Lake Rd at Arrowbear Trail, vic. of California Valley, c. 5 mi. NW of Soda Lake 610 Comment
  UCR206397  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 2009-3-11 14370 Colusa Inner North Coast Range Foothills, along CA-20, 9.7 miles southwest of Williams, on the north side of Salt Creek 162 Comment
  UCR87503  Phlox gracilis George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 25.6 miles NW of Canby along Calif. Hwy 139 1280 Comment
  UCR61760  Pholistoma auritum George K. Helmkamp 1990-4-1 s.n. San Luis Obispo West Cuesta Ridge, c. 3 mi west of US Hwy 101 671 Comment
  UCR161794  Pholistoma auritum var. auritum George K. Helmkamp, E. A. Helmkamp 2005-3-14 9153 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  RSA614977  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 CA Hwy 33 (roughly WNW of Maricopa). 549 Comment
  SBBG93092  Pholistoma membranaceum G. K. Helmkamp 1990-4-19 s.n. Kern St Hwy 58, 1.5 mi E of San Luis Obispo County Line 853 Comment
  SEINET235762  Pholistoma membranaceum G. K. Helmkamp, E. A. Helmkamp 1998-5-14 3666 San Benito Along CA Hwy 25 17.6 miles northeast of the junction with CA Hwy 198. 488 Comment
  UCR130084  Pholistoma membranaceum George K. Helmkamp, E. A. Helmkamp 2000-4-24 5560 Monterey Inner South Coast Ranges, Salinas Valley, 6 miles south of King City and 0.6 mile east of G-14 (Jolon Rd) on San Lucas Rd. 183 Comment
  RSA709318  Phoradendron villosum George K. Helmkamp 2004-4-23 8533 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd., 15.0 Owens peak region, Gold Canyonmi NE of Los Olivos. 1341 Comment
  UCR136214  Phoradendron villosum George K. Helmkamp, E. A. Helmkamp 1999-9-30 5309 San Bernardino East side San Bernardino Mountains., 7.3 mi up Burns cyn Rd from Rimrock Rd (NW of Pioneertown) 1799 Comment
  UCR241163  Phoradendron villosum George K. Helmkamp, E. A. Helmkamp 2012-10-3 19952 Sacramento Southeast Sacramento Valley, bike trail parking area at the south side of the American River, 0.6 mile west of Gold Country Road 27 Comment
  SD257374  Phyla nodiflora George K. Helmkamp, Mary Alice Barnes 2013-5-8 20526 Yolo Southern Sacramento Valley: Yolo Bypass Wildlife Area, 0.9 mile southeast of the hunction of Chiles Road and I-80, between Sacreamento and Davis (Davis 7.5'Q) 13 Comment
  RSA615335  Physalis crassifolia George K. Helmkamp, E. A. Helmkamp 1998-2-18 2692 Riverside Colorado Desert: Midland Road, 3.8 miles SE of Midland, Little Maria Mountains Comment
  SBBG83842  Physalis crassifolia G. K. Helmkamp 1986-10-18 San Bernardino Whipple Mtns, along Havasu Palms Rd, ca. 3 mi NW of Black Meadow Landing Rd 396 Comment
  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
  UCR233040  Picris echioides George K. Helmkamp, E. A. Helmkamp 2011-5-12 17268 Sutter Sacramento Valley, Howsley Road at CA-99/El Centro Blvd., 3.3 miles west of Pleasant Grove 30 Comment
  UCR114352  Pinus contorta subsp. murrayana George K. Helmkamp, E. A. Helmkamp 2000-7-17 5810 Mono Sierra Nevada Mountains, South Twin Lake along Lake Mary Road, 3 miles SW of Mammoth Lakes 2561 Comment
  UCR129544  Pinus contorta subsp. murrayana George K. Helmkamp, E. A. Helmkamp 2001-7-8 6834 Mono Sierra Nevada Mountains, Virginia Lakes Road, 2.4 mi from US Hwy 395 2683 Comment
  UCR176223  Pinus contorta subsp. murrayana George K. Helmkamp, E. A. Helmkamp 2006-7-10 10913 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
  UCR146834  Piptatherum miliaceum George K. Helmkamp, E. A. Helmkamp 2004-9-29 8818 Santa Barbara Santa Ynez Mountains, Stagecoach Road at junction with Calif. Hwy 154, SE of Lake Cachuma 561 Comment
  UCR140152  Pisum sativum George K. Helmkamp 2004-2-6 8250 San Luis Obispo Central Coast, Riverside Road at the low end of Nipomo Mesa beside Division Road 46 Comment
  UCR237594  Plagiobothrys George K. Helmkamp, E. A. Helmkamp 2012-4-21 18822 Nevada Northern Sierra Nevada Mountains Foothills, McCourtney Road, 0.4 mile east of its junction with Perimeter Rd., 14.5 mi. NW (338 deg. ) of Auburn 407 Comment
  UCR250691  Plagiobothrys fulvus George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20191 Calaveras Northern Sierra Nevada Mountains Foothills, Along CA-26, 5.1 miles southwest of Mokelumne Hill 393 Comment
  CLARK-A1045-64  Plagiobothrys nothofulvus George K. Helmkamp 1979-4-27 Riverside Santa Ana Mountains head of De Luz Creek; Wildomar 7.5'Q Comment
  SD241781  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2012-3-31 18646 Placer Sacramento Valley: along CA-193, 0.1 mile west of its junction with Sierra College Blvd. Wide flat between highway and oaks. 88 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
  UCR122196  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2002-4-23 7519 Madera Western Sierra Nevada Foothills, along Belleview Rd (Rd 208) 1.2 mi west of Bear Lake Rd (Rd 211), west of Indian Springs 213 Comment
  UCR161688  Plagiobothrys nothofulvus George K. Helmkamp, E. A. Helmkamp 2005-2-24 8967 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
  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
  UCR198488  Plagiobothrys stipitatus var. micranthus George K. Helmkamp, E. A. Helmkamp 2008-5-4 13378 Amador Sierra Nevada Mountains, Barton, c. 15 miles (air) NE of Jackson, at the junction of Tiger Creek Road and Black Prince Road, 0.6 mil east of the junction of Tiger Creek Road with CA-88 936 Comment
  UCR173594  Plagiobothrys undulatus George K. Helmkamp, Elizabeth Helmkamp 2006-5-1 10290 El Dorado Northern Sierra Nevada foothills, corner of Pleasant Valley Road and Patterson Drive; west end of Diamond Springs 537 Comment
  UCR158373  Plantago coronopus George K. Helmkamp, E. A. Helmkamp 2004-6-24 8703 Santa Barbara Central Coast, Ocean Park at Surf, NW of Lompoc 6 Comment
  UCR158390  Plantago coronopus George K. Helmkamp, E. A. Helmkamp 2004-6-20 8681 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Sudden Rd west of Sudden Peak and 1.2 mi SW of Miquelito Rd (SW of Lompoc) 412 Comment
  UCR189649  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2007-3-17 11656 Calaveras Eastern Sacramento Valley, about 1 mile north of Burson on the road to south Comanche Reservoir 152 Comment
  UCR197274  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2008-4-25 13304 El Dorado Sierra Nevada Mountains Foothills, junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Georgetown 674 Comment
  UCR237083  Plantago erecta George K. Helmkamp, E. A. Helmkamp 2012-4-24 18832 El Dorado Northern Sierra Nevada Mountains Foothills, Bear Creek Road, 0.4 mile south of its junction with Meadow Brook Road, 2.5 miles NE (66 deg. ) of Garden Valley 705 Comment
  UCR101664  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 1998-5-16 3739 San Mateo Portola Valley, Golden Hills Rd along Los Trancos Creek 107 Comment
  UCR158888  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 2005-4-17 9375 San Luis Obispo Central Coast, Corbett Canyon, 2.3 miles north of Calif. Hwy 227 in Arroyo Grande 81 Comment
  UCR241334  Plantago lanceolata George K. Helmkamp, E. A. Helmkamp 2012-9-20 19881 Amador Northern Sierra Nevada Mountains Foothills, along Hwy E-26 (Red Corral/West Point-Pioneer Rd.) just north of the bridge over the North Fork Mokelumne River 613 Comment
  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
  UCR102561  Plantago maritima George K. Helmkamp, E. A. Helmkamp & A. Kerchner 1997-6-26 2143 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  SD143745  Plantago ovata G. K. Helmkamp, E. A. Helmkamp 1998-3-18 2869 Imperial Between Highway I-8 and the All-American Canal across from the Brock Research Center; ca. 3.0 miles east of the junction of Highway CA-98 with I-8. 46 Comment
  UCR103575  Plantago ovata George K. Helmkamp 1998-1-17 2527 Riverside Coachella Valley, Bob Hope Drive, 0.9 mi south of Hwy I-10 43 Comment
  UCR103663  Plantago ovata George K. Helmkamp, E. Helmkamp 1998-1-23 2561 Imperial Sonoran (Colorado) Desert, On the W side of Hwy 86, 18.8 mi. NW of Westmorland -30 Comment
  UCR122606  Plantago ovata George K. Helmkamp, E. A. Helmkamp 2001-3-17 6280 Imperial Sonoran (Colorado) Desert, Ogilby Rd., 15.4 miles south of Calif. Hwy 78 168 Comment
  RSA0049897  Platanthera leucostachys George K. Helmkamp, E. A. Helmkamp 2012-7-6 19354 El Dorado Robbs Peak Road at the junction with Ice House Road, 22 miles north of US-50. 2078 Comment
  UCR258119  Platanthera leucostachys George K. Helmkamp, Amy Barnes 2014-8-11 23009 El Dorado Northern Sierra Nevada Mountains, north of Union Valley Reservoir, junction of Robbs Peak Road and Ice House Road 1655 Comment
  CLARK-A1045-869  Platystemon californicus George K. Helmkamp 1978-6-1 #4 Riverside Santa Ana Mountains Wildomar 7.5'Q Comment
  UCR91812  Platystemon californicus George K. Helmkamp 1996-5-25 1053 San Luis Obispo Central Coast, between CA Hwy 1 and the ocean, 1.5 miles north of Piedras Blancas lighthouse near the northern border of the county 15 Comment
  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
  UCD137561  Plectritis ciliosa G. K. Helmkamp; E. A. Helmkamp 2007-4-5 11732 Amador Northern Sierra Nevada Mountains: Sutter to Ione Road. 0.4 mile east of CA-49, northeast of Ione. 180 Comment
  UCR184813  Plectritis ciliosa subsp. ciliosa George K. Helmkamp, E. A. Helmkamp 2007-5-7 11969 El Dorado Foothills, Northern Sierra Nevada Mountains, along Calif. Hwy 49, 6.1 miles northwest of Placerville 454 Comment
  UCD60376  Plectritis macrocera G. K. Helmkamp; E. A. Helmkamp 2007-5-7 11966 El Dorado Northern Sierra Nevada Mountains: Pedro Hills Road, 0.5 mile west of its junction with CA-49, junction of roads 5.3 miles south of Cool. 311 Comment
  UCR87264  Plectritis macrocera George K. Helmkamp, E. A. Helmkamp 1993-5-4 s.n. Modoc 35.6 miles NW of Canby along Calif. Hwy 139 1280 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
  SD240812  Poa annua George K. Helmkamp, E. A. Helmkamp 2012-4-7 18713 San Joaquin San Joaquin Valley: along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden (Valley Springs SW 7.5'Q) 52 Comment
  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
  UCR253212  Poa annua George K. Helmkamp, Amy Barnes 2014-4-7 22730 Sacramento Sacramento Valley, Clay East Road, 1 mile east of its junction with CA-104 52 Comment
  UCR259865  Poa annua George K. Helmkamp, Elizabeth Helmkamp 2013-10-22 22458 Amador Sierra Nevada Mountains Foothills, Shenandoah Road, near Sobon Creek, 6.8 miles northeast of its junction with CA-49 in Plymouth 563 Comment
  UCR96394  Poa annua George K. Helmkamp 1996-9-22 1204 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  SD236151  Poa bolanderi G. K. Helmkamp, E. A. Helmkamp 2008-7-16 13801 Alpine Northern Sierra Nevada Mountains: Wood Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCD90677  Poa bulbosa G. K. Helmkamp; E. A. Helmkamp 2007-3-31 11718 Nevada Northern Sierra Nevada Mountains. Along CA-49 at Lime Kiln Rd., 0.6 mi. north of Cherry Creek Acres. 549 Comment
  UCR185218  Poa bulbosa George K. Helmkamp, E. A. Helmkamp 2007-4-23 11785 Amador Foothills, Northern Sierra Nevada Mountains, along Bell Road beside Plymouth Creek just east of Calif. Hwy 49 in the vicinity of Enterprise 302 Comment
  UCR190567  Poa cusickii George K. Helmkamp 2007-6-29 12438 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  CLARK-A1045-1109  Poa palustris 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
  UCR246638  Poa pratensis George K. Helmkamp, E. A. Helmkamp 2012-6-6 19147 Amador Northern Sierra Nevada Mountains, Panther Creek Road, 5.8 miles south of its junction with CA-88, 6.2 mi. SW (246 deg. ) of Bear River Reservoir dam 1465 Comment
  RSA0045148  Poa secunda George K. Helmkamp, E. A. Helmkamp 2012-7-6 19340 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
  UCR235487  Poa secunda George K. Helmkamp, E. A. Helmkamp 2012-5-5 18932 Placer Northern Sierra Nevada Mountains Foothills, Todd Valley Road, 1.2 miles south of its junction with Foresthill Road 779 Comment
  UCR116020  Poa wheeleri George K. Helmkamp, E. A. Helmkamp 2000-7-18 5869 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
  UCR219131  Polemonium californicum George K. Helmkamp, E. A. Helmkamp 2010-7-13 16557 Alpine Northern Sierra Nevada Mountains, north side of Kirkwood, just north of CA-88 near the El Dorado and Amador Co. lines, west end of Caples Lake 2332 Comment
  UCR257913  Polemonium californicum George K. Helmkamp, Amy Barnes 2012-8-12 19600 Alpine Northern Sierra Nevada Mountains, Woods Lake Road, 0.8 mile SE of its junction with CA-88 and beside Woods Creek 2286 Comment
  UCR134422  Polycarpon tetraphyllum George K. Helmkamp 2003-9-19 8143 San Luis Obispo Central Coast, Nipomo Mesa area. Pomeroy Rd, 0.2 mi south of Los Berros Rd. 76 Comment
  CDA7123  Polygonum arenastrum G. K. Helmkamp, E. A. Helmkamp 2006-10-1 11511 Nevada Northern Sierra Nevada Mountains Foothills; Along Highway CA-49, 10.4 miles north of the crossing of the South Yuba River. Comment
  SD236381  Polygonum aviculare G. K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter Sacramento Valley: South Butte Road 1.2 miles northwest of junction with CA-20 west of Yuba City. 22 Comment
  SEINET4560747  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2011-1 18357 Nevada Northern Sierra Nevada Mountains: small, open flat along CA-20, 2.6 miles west of its junction with Lowell Hill Road. 1581 Comment
  UCR201760  Polygonum aviculare George K. Helmkamp, E. A. Helmkamp 2008-10-6 14216 Sutter Sacramento Valley, South Butte Road 1.2 miles northwest of junction with CA-20, west of Yuba City 23 Comment
  RSA0062483  Polygonum davisiae George K. Helmkamp, Belinda Pesheck 2013-7-14 21082 Alpine Blue Lakes Road, 0.35 mile south of its junction with Tamarack/Sunset Lake Road. 2468 Comment
  UCR189048  Polygonum davisiae George K. Helmkamp 2007-7-7 12512 Alpine Northern Sierra Nevada Mountains, Blue Lake Road, 12.0 miles south of its junction with CA-88 2549 Comment
  UCR229562  Polygonum douglasii subsp. douglasii George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18045 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 5.0 miles [northeast] of Boards Crossing of the North Fork Stanislaus River 1716 Comment
  UCR234614  Polygonum douglasii subsp. douglasii George K. Helmkamp, E. A. Helmkamp 2011-8-19 18100 Alpine Northern Sierra Nevada Mountains, Blue Lakes Road, 6.6 miles south of its junction with CA-88 2296 Comment
  UCR161967  Polygonum fagopyrum George K. Helmkamp, E. A. Helmkamp 2005-2-9 8894 Santa Barbara Outer South Coast Ranges, south edge of Sierra Madre Mtns north of Sisquoc; 1.6 mi north of Foxen Canyon Road along Tepusquet Road 171 Comment
  UCR170473  Polygonum hydropiper George K. Helmkamp, Elizabeth Helmkamp 2005-9-12 9865 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
  UCR79507  Polygonum persicaria George K. Helmkamp 1993-11-4 X 10 Imperial Sonoran (Colorado) Desert, Edge of the old bed of the Colorado River, 0.25 mile north of Walter's Camp, 30 miles by road south of Blythe 91 Comment
  UCR209747  Polygonum phytolaccifolium George K. Helmkamp, E. A. Helmkamp 2009-8-12 15440 Placer Sierra Nevada Mountains, Forest Hill Road, 0.8 mile west of Robinson Flat, c. 27 miles NE of the city of Foresthill 2034 Comment
  UCR237732  Polygonum polygaloides subsp. kelloggii George K. Helmkamp, E. A. Helmkamp 2012-7-14 19374 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
  UCR230711  Polygonum prolificum George K. Helmkamp, E. A. Helmkamp 2011-7-19 17831 Tuolumne Northern Sierra Nevada Mountains, Forest Route 5N14, 3.7 miles southeast of Boards Crossing bridge of North Fork Stanislaus River 1494 Comment
  UCR179808  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2006-10-18 11531 El Dorado Northern Sierra Nevada Mountains Foothills, Diamond Springs; village along Calif. Hwy 49 south of Placerville 540 Comment
  UCR205156  Polygonum punctatum George K. Helmkamp, E. A. Helmkamp 2008-10-30 14300 Sacramento Southern Sacramento Valley, along CA-104, 0.6 mile west of Clay 24 Comment
  UCR253088  Polygonum punctatum George K. Helmkamp, Elizabeth Helmkamp 2013-8-11 22153 Amador Sierra Nevada Mountains Foothills, Sutter Creek-Volcano Road, 11.3 miles northeast of the town of Sutter Creek 582 Comment
  UCR260074  Polygonum punctatum George K. Helmkamp, Elizabeth Helmkamp 2013-10-15 22425 El Dorado Sierra Nevada Mountains Foothills, Oak Hill Road, 3.6 miles south of its junction with Pleasant Valley Road 614 Comment
  UCR206693  Polypodium hesperium George K. Helmkamp, E. A. Helmkamp 2009-3-5 14334 El Dorado Northern Sierra Nevada Mtns. Foothills, Sand Ridge Road 4.3 miles east of its junction with CA-49 494 Comment
  UCR230726  Polystichum imbricans George K. Helmkamp, E. A. Helmkamp 2011-6-9 17549 Sierra Northern Sierra Nevada Mountains Foothills, 7.1 miles north of Camptonville along CA-49, about 2.5 miles north of the Yuba Co. line 808 Comment
  SEINET1908707  Polystichum imbricans subsp. curtum G. K. Helmkamp, E. A. Helmkamp 2008-1 13571 El Dorado Sierra Nevada Mountains: Forbay Road, 7.1 miles northwest of CA-50 (road junction in Pollock Pines), no-outlet road leading to the South Fork of the American River (Pollock Pines 7.5' Q). 716 Comment
  UCR190702  Polystichum imbricans subsp. imbricans George K. Helmkamp, E. A. Helmkamp 2007-9-14 12966 Placer Northern Sierra Nevada Mountains Foothills, along Mosquito Ridge Road 15 miles east of Foresthill 832 Comment
  UCR191116  Polystichum imbricans subsp. imbricans George K. Helmkamp, E. A. Helmkamp 2007-8-29 12823 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
  UCR206865  Polystichum scopulinum George K. Helmkamp, E. A. Helmkamp 2009-6-25 15047 El Dorado Sierra Nevada Mountains Foothills, Forbay Road at South Fork American River, 7.6 miles north of junction with Pony Express Trail in Pollock Pines 579 Comment
  HSC78516  Porophyllum gracile G. K. Helmkamp 1983-3-24 3835 Riverside Chuckwalla Valley, at junction of the Graham Pass & Chuckwalla Springs Rd. 229 Comment
  UCR96380  Potamogeton pectinatus George K. Helmkamp 1996-9-28 1242 Mono Eastern Sierra Nevada Mtns., Hot Creek at Owens River Road 2134 Comment
  UCR257674  Potentilla drummondii subsp. breweri George K. Helmkamp, Elizabeth Helmkamp 2012-8-24 19691 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
  UCR190707  Potentilla drummondii subsp. bruceae George K. Helmkamp 2007-6-29 12434 Amador Northern Sierra Nevada Mountains, Kirkwood Meadows about one mile west of Kirkwood and 0.1 mile south of CA-88 2317 Comment
  RSA739788  Potentilla glandulosa subsp. ashlandica George K. Helmkamp, E. A. Helmkamp 2007-6-8 12287 El Dorado Bonetti Road, 2.0 miles south of Mormon Emigrant Trail. 1189 Comment
  UCR190661  Potentilla glandulosa subsp. glandulosa George K. Helmkamp, E. A. Helmkamp 2007-5-23 12072 Placer Northern Sierra Nevada Mountains, Sugar Pine road, 0.2 mile northwest of Forest Hill Road 1360 Comment
  SEINET11262391  Potentilla glandulosa subsp. reflexa George Helmkamp, Ann Kerchner; Amy Barnes 2011-8-13 18042 Tuolumne Northern Sierra Nevada Mountains. Forest Route 5N14. 5 miles N of Boards Crossing of the North Fork Stanislaus River. (Boards Crossing 7.5' Q.); 0 1716 Comment
  CLARK-A1045-581  Potentilla gracilis subsp. nuttallii George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains Keller Peak 7.5'Q 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
  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
  UCR235131  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
  UCR89419  Potentilla gracilis var. fastigiata George K. Helmkamp 1994-7-28 103- 6 Mono Eastern Sierra Nevada Mtns., Long Valley, Crowley Lake Road at Whiskey Creek, 3 miles east of Tom's Place 2119 Comment
  SBBG123118  Poteridium annuum G. K. Helmkamp with E. A. Helmkamp 2007-9-14 12959 Placer Mosquito Ridge Rd 0.4 mi E of Foresthill 942 Comment
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Mar 30 2014
  UCR106454  Prunella vulgaris var. lanceolata George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2154 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR122359  Prunella vulgaris var. lanceolata George K. Helmkamp, E. A. Helmkamp 2001-7-8 6981 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
  SD197904  Prunus G. K. Helmkamp, E. A. Helmkamp 2008-5-4 13382 Amador 15 miles northeast of Jackson, at the junction of Tiger Creek Road and Black Prince Road, 0.6 mile east of the junction of Tiger Creek Road with CA-88. 936 Comment
  SEINET2442022  Prunus emarginata George K. Helmkamp, E. A. Helmkamp 2009-8-12 15433 Placer Sierra Nevada Mountains: Forest Hill Road, 0.8 mile west of Robinson Flat, c.27 miles NE of the city of Foresthill (Duncan Peak 7.5' Q).; 0 2033 Comment
  SEINET7356567  Prunus emarginata George K. Helmkamp, Elizabeth Helmkamp 2006-5-24 10545 El Dorado Northern Sierra Nevada Mountains: El Dorado National Forest; S of Union Valley Reservoir, ca. 2 (air mi. N of US Hwy 50); junction of Ice House Canyon Road and Granite Springs Road (Riverton 7.5' Q.: Near 381/447'56'N, 1201/423'49'W).; 0 1610 Comment
  UCD113213  Prunus emarginata G. K. Helmkamp; E. A. Helmkamp 2007-5-23 12063 Placer Northern Sierra Nevada Mountains; Humbug Canyon Road, 0.2 mile northwest of Forest Hill Road, generally southwest of Westville. 1576 Comment
  UCR217265  Prunus emarginata George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16300 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 14 miles southeast of junction with Sly Park Road at Jenkinson Lake 1662 Comment
  UCR256823  Prunus emarginata George K. Helmkamp, Amy Barnes 2014-5-14 22870 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 11.9 miles east of its junction with Sly Park Road, 6.8 air mi. SW (225 deg. ) of Kyburz 1808 Comment
  UCR37671  Prunus fasciculata George K. Helmkamp 1984-4-20 840420- 46 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
  UCR189618  Prunus persica George K. Helmkamp, E. A. Helmkamp 2007-3-11 11612 El Dorado Northern Sierra Nevada Mountains Foothills, Marshall Road at the north end of Garden Valley 611 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
  CLARK-A1045-184  Psilocarphus brevissimus George K. Helmkamp 1979-5-5 Riverside Santa Ana Mountains vernal pool; Wildomar 7.5'Q Comment
  UCR206332  Psilocarphus tenellus George K. Helmkamp, E. A. Helmkamp 2009-5-24 14783 El Dorado Sierra Nevada Mountains Foothills, Sand Ridge Road, 3.3 miles eat of the Cosumnes River and CA-49 521 Comment
  RSA628612  Psorothamnus fremontii George K. Helmkamp, E. A. Helmkamp 1998-5-3 3504 San Bernardino Mesquite Mtns, 3 mi. W of the Nevada border at Sandy Valley. 1067 Comment
  SD227821  Psorothamnus fremontii var. fremontii G. K. Helmkamp, E. A. Helmkamp 1998-5-3 3504 San Bernardino Eastern Mojave Desert: Mesquite Mtns., 3.0 mi. W of the Nevada border at Sandy Valley 1067 Comment
  UCR206953  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2009-5-28 14825 Yuba Sierra Nevada Mountains Foothills, along CA-49, 0.5 mile north of the Camptonville exit 805 Comment
  UCR231876  Pteridium aquilinum var. pubescens George K. Helmkamp, E. A. Helmkamp 2010-10-16 17019 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
  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
  RSA518918  Pteryxia terebinthina George K. Helmkamp 1990-8-2 s.n. Mono Between Mammoth and Lake Mary. 2591 Comment
  UCR121937  Ptilagrostis kingii George K. Helmkamp, E. A. Helmkamp 2000-7-19 5925 Inyo Sierra Nevada Mountains, Mosquito Flat, 0.9 mi south of Rock Creek Lake, beside Rock Creek 3140 Comment
  UCR93199  Purshia glandulosa George K. Helmkamp 1993-4-24 s.n. San Bernardino Northeastern Mojave Desert, along Smith Talc Road, c. 9 miles east of Tecopa [Pass?, Inyo Co.; probably after Sm. T. Rd. transition to Excelsior Mine Rd.] 1067 Comment
  UCR197031  Purshia tridentata var. tridentata George K. Helmkamp, E. A. Helmkamp 2008-7-22 13977 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
  UCR222561  Pyracantha fortuneana George K. Helmkamp, E. A. Helmkamp 2010-6-5 16254 Sonoma North Coast Ranges, junction of Martinelli Road and River Road, 4.65 air mi. due east of Guerneville 9 Comment
  UCR134461  Pyrrocoma apargioides George K. Helmkamp, E. A. Helmkamp 1998-8-11 4339 Mono White Mountains, Campito Meadow, west of White Mountain Road at Poison Creek 3293 Comment
  UCR95896  Pyrrocoma lanceolata George K. Helmkamp 1996-9-29 1252 Mono Spring [Layton Springs] on the east side of Lake Crowley 3.5 miles SSE of Benton Crossing 2073 Comment
  SD185231  Quercus cornelius-mulleri G. K. Helmkamp 1993-9-18 29 10 San Bernardino Morongo Valley, canyon at west end of Palo Verde Road, 1.0 mile west of Juniper Ave. 1070 Comment
  UCR194978  Quercus douglasii George K. Helmkamp, E. A. Helmkamp 2007-10-13 13101 Amador Northern Sierra Nevada Mountains Foothills, along Hwy CA-49, 0.6 mile south of Plymouth 314 Comment
  RSA787262  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
  UCR223854  Quercus kelloggii George K. Helmkamp, E. A. Helmkamp 2009-9-15 15628 El Dorado Sierra Nevada Mountains Foothills, Omo Ranch Road, 3.9 miles west of Omo Ranch/junction with Slug Gulch Road [problem] 1043 Comment
  UCD61308  Quercus wislizeni var. wislizeni G. K. Helmkamp; E. A. Helmkamp 2007-9-19 12980 El Dorado Northern Sierra Nevada Mountains: along Greenstone Road just south of its junction with US-50 (east of Shingle Springs). 427 Comment
  RSA0019380  Ranunculus bonariensis var. trisepalus George K. Helmkamp, E. A. Helmkamp 2011-5-6 17205 Yuba junction of Camp Far West Road and Spenceville Road, 5.4 mi. NE (47 ) of Wheatland. 56 Comment
  SEINET3282817 Image available Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 2007-4-27 11864 El Dorado Foothills, Northern Sierra Nevada Mountains; junction of Ice House Road and White Meadows Road, about 2 miles northwest of US-50. 1029 Comment
  UCD95952  Ranunculus californicus G. K. Helmkamp; Elizabeth Helmkamp 2006-5-11 10379 Nevada Northern Sierra Nevada Mountains. Cedarsong Road, 0.1 mile NE of CA-Hwy 49 (NW of Nevada City). 637 Comment
  UCR106671  Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 1998-5-18 3765 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
  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
  UCR173302  Ranunculus californicus George K. Helmkamp, Elizabeth Helmkamp 2006-5-18 10474 El Dorado Northern Sierra Nevada Foothills, Spring Valley; Telephone Ridge area, NW of Riverton. Brockliss Canyon Road, about 11 mi. NW of junction with Meadowridge Road and Ice House Canyon Road (SSW of Union Valley Reservior, c. 1.4 air mi. N of US Hwy 50) 1189 Comment
  UCR173473  Ranunculus californicus George K. Helmkamp, Elizabeth Helmkamp 2006-4-6 10151 El Dorado Northern Sierra Nevada Foothills, ENE of Sacramento; 4.2 mi NW of Coloma along Calif. Hwy 49 247 Comment
  UCR231887  Ranunculus californicus George K. Helmkamp, E. A. Helmkamp 2011-4-10 17148 Placer Sacramento Valley, east of Sheridan just north of the junction of North Kilaga Springs Road and Kilaga Springs Road 98 Comment
  UCR122394  Ranunculus californicus var. californicus George K. Helmkamp, E. A. Helmkamp 2002-4-23 7494 Madera Western Sierra Nevada foothills, Bass Lake Road, 1 mile southeast of the junction with CA Hwy 41, north of Oakhurst 915 Comment
  CLARK-A1045-378  Ranunculus canus var. ludovicianus George K. Helmkamp 1979-6-5 San Bernardino San Bernardino Mountains just west of Stanfield cut-off, sagebrush flat, south side of lake; ; Big Bear Lake 7.5'Q 2133 Comment
  CAS-BOT-BC434232  Ranunculus muricatus G. K. Helmkamp; E. A. Helmkamp 2008-4-25 13321 El Dorado Sierra Nevada Mountains Foothills: junction of Meadowbrook and Bear Creek Roads at Traverse Creek, south of Georgetown. 674 Comment
  CDA36373  Ranunculus muricatus G. K. Helmkamp, E. A. Helmkamp 2009-5-4 14589 El Dorado Sierra Nevada Mountains Foothills; Junction of Bonetti Road and Mormon Emigrant Trail, 3.6 miles east of Sly Park Rd. and Jenkinson Lake. Comment
  UCR208576  Ranunculus muricatus George K. Helmkamp, E. A. Helmkamp 2009-5-4 14601 El Dorado Sierra Nevada Mountains Foothills, Sly Park Road, 0.3 miles southwest of its junction with Mormon Emigrant Trail 1067 Comment
  UCR208582  Ranunculus muricatus George K. Helmkamp, E. A. Helmkamp 2009-5-4 14589 El Dorado Sierra Nevada Mountains Foothills, junction of Bonetti Road and Mormon Emigrant Trail, 3.6 miles east of Sly Park Rd. and Jenkinson Lake 1226 Comment
  UCR185230  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2007-4-23 11790 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
  UCR206052  Ranunculus occidentalis George K. Helmkamp, E. A. Helmkamp 2009-6-11 14981 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
  UCR254597  Ranunculus occidentalis George K. Helmkamp 2014-3-11 22548 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
  SD236247  Raphanus raphanistrum G. 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 (Olivehurst 7.5'Q) 20 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
  UCR257017  Raphanus raphanistrum George K. Helmkamp, Mary Alice Barnes 2013-5-13 20568 Amador Sierra Nevada Mountains Foothills, along E-16/Shenandoah Rd., 3.6 road miles south of River Pines, 4.15 air miles NE (39 deg. ) of Plymouth 517 Comment
  UCR171547  Raphanus sativus George K. Helmkamp, E. A. Helmkamp 2006-3-19 10092 Amador Northern Sierra Nevada Foothills, Along Calif. Highway 49 just south of Plymouth 323 Comment
  UCR249547  Raphanus sativus George K. Helmkamp 2013-3-1 20144 Sutter Sacramento Valley, Sacramento River levee along Cranmore Road, 0.7 mile south of Seymour Road via an unnamed road, 2 miles due west of Robbins 7 Comment
  UCR272997  Raphanus sativus George K. Helmkamp 2014-3-14 22564 A Amador Eastern Sacramento Valley/Sierra Nevada Foothills, along Hwy E-16, 0.6 mile southwest of the junction with CA-49, c. 2.5 mi southwest of Plymouth 250 Comment
  UCR177010  Rhamnus californica George K. Helmkamp, E. A. Helmkamp 2005-7-31 9750 El Dorado Northern Sierra Nevada Foothills, 20 mi WSW of Lake Tahoe; Ice House Road, N of Calif. Highway 50 and 1.5 mi south of junction with Ice House Reservoir 1637 Comment
  UCR200856  Rhamnus tomentella subsp. tomentella George K. Helmkamp, E. A. Helmkamp 2008-9-15 14099 Placer Foothills, northern Sierra Nevada Mountains, along Mosquito Ridge Road, 3.1 miles southeast of Forest Hill 773 Comment
  UCR121446  Ribes cereum var. cereum George K. Helmkamp, E. A. Helmkamp 1999-6-30 5084 Nevada Northern Sierra Nevada Range, Tahoe Nat. Forest, Donner Pass Rd. (=Hwy 40), 2.2 mi. west of Lake Donner. 1997 Comment
  UCR200910  Ribes cereum var. cereum George K. Helmkamp, E. A. Helmkamp 2008-8-30 14050 El Dorado Northern Sierra Nevada Mountains, Leek Spring Valley, Foster Meadow Road 0.9 miles southwest of its junction with Mormon Emigrant Trail 2241 Comment
  UCR103810  Ribes malvaceum George K. Helmkamp 1997-3-8 1457 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
  SD247441  Ribes nevadense George Helmkamp, E. A. Helmkamp 2012-9-25 19902 Placer Northern Sierra Nevada Mountains: Blue Canyon Road, 1.1 miles south of its intersection with I-80, c. 1/2 mile south of Blue Canyon-Nyack Airport (Blue Canyon 7.5'Q) 1473 Comment
  UCR157813  Ribes nevadense George K. Helmkamp, E. A. Helmkamp 1998-6-29 4188 Kern Tehachapi Mountains, Tehachapi Mountain Park, 4.2 miles SW of Highline Road along Water Canyon Road 1768 Comment
  VVC472  Ribes nevadense G. K. Helmkamp 1996-6-11 1126 San Bernardino San Bernardino Mtns., 1.2 mi. SW of Tulip Ave, City of Big Bear Lake 2143 Comment
  RSA0024722  Ribes roezlii var. roezlii George K. Helmkamp, William Barnes 2010-9-4 16930 El Dorado Tragedy Spring Road, 0.1 mile southwest of its upper junction with CA-88 2412 Comment
  SD239667  Rorippa George K. Helmkamp, E. A. Helmkamp 2012-7-2 19317 Amador Northern Sierra Nevada Mountains Foothills: Bear Ri ver Road, 0.3 miles east of the Lower Bear River Reservoir dam (Bear River Reservoir 7.5'Q) 1816 Comment
  SEINET11266299  Rorippa curvisiliqua George Helmkamp, E. A. Helmkamp 2010-8-3 16696 Calaveras Northern Sierra Nevada Mountains: along CA-4, 0.8 mile southwest of the junction with Forest Route 7N23/ Black Creek Rd., NE of Dorrington (Boards Crossing 7.5' Q.); 0 1854 Comment
  UCD115279  Rorippa curvisiliqua G. K. Helmkamp; E. A. Helmkamp 2006-8-3 11127 Alpine Northern Sierra Nevada Mountains; Wood's Lake Road, 0.3 mile north of the parking area for Wood's Lake. At juncture of meadows, Wood's Creek, and coniferous forest. 2509 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
  UCR146646  Rosa californica George K. Helmkamp, E. A. Helmkamp 2004-10-1 8832 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
  CDA25210  Rosa gymnocarpa G. K. Helmkamp, E. A. Helmkamp 2007-10-28 13115 Sutter Sacramento Valley; Along Nicolaus Road, 0.1 mile west of the Placer County line. Comment
  UCR134474  Rosa woodsii var. ultramontana George K. Helmkamp, E. A. Helmkamp 1998-8-10 4259 Inyo Eastern Sierra Nevada Mountains, along Big Pine Creek 12 mi west of Big Pine along Glacier Lodge Rd. 2317 Comment
  UCR206760  Rubus discolor George K. Helmkamp, E. A. Helmkamp 2009-6-25 15050 El Dorado Sierra Nevada Mountains Foothills, Forbay Road at South Fork American River, 7.6 miles north of junction with Pony Express Trail in Pollock Pines 579 Comment
  UCD113781  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
  UCR14392  Rubus ulmifolius var. inermis George K. Helmkamp 1974-6-24 s.n. San Diego Roadside, US Hwy 395 at Interstate 8 Comment
  RSA756086  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2009-5-28 14843 Sierra along CA-49, 1.6 miles north of the Yuba County line 902 Comment
  SD237574  Rumex acetosella G. K. Helmkamp, E. A. Helmkamp 2009-6-10 14943 Shasta Southern Cascade Range: Alvord Road, p.2 mile south of ites junction with CA-44, junction is 1.1 miles east of Shingletown (Shingletown 7.5'Q) 938 Comment
  UCD101025  Rumex acetosella G. K. Helmkamp; E. A. Helmkamp 2006-7-12 10966 El Dorado Northern Sierra Nevada Mtns: Sierra-at-Tahoe road (west end of Phillips), 1.5 miles south of Hwy US-50. 2104 Comment
  UCD101029  Rumex acetosella G. K. Helmkamp; E. A. Helmkamp 2007-4-27 11871 El Dorado Northern Sierra Nevada Mountains. Junction of Ice House Road and White Meadows Road. About 2 miles northwest of US-50. 1029 Comment
  UCD101030  Rumex acetosella G. K. Helmkamp; E. A. Helmkamp 2007-5-9 11981 El Dorado Northern Sierra Nevada Mountains. White Meadow Road, 0.6 mile west of its junction with Ice House Road, c. 0.75 mi. NNW of Riverton. 1082 Comment
  UCR101671  Rumex acetosella George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2205 Mendocino North Coast, two miles north of Westport between US-1 and the coast 30 Comment
  UCR115783  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2000-4-19 5380 San Luis Obispo Central Coast, Irish Hills (SSW of San Luis Obispo). See Cyn., 3 mi south of Los Osos Valley Rd, up Prefumo Cyn. to crest, and down See Cyn. to the site 213 Comment
  UCR122836  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 1998-5-19 3876 San Luis Obispo Outer South Coast Range; Santa Lucia Range, southwest of Paso Robles along CA Hwy 46 at York Mountain Road 366 Comment
  UCR123999  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2001-7-6 6857 Plumas Sierra Nevada Mountains, Calif. Hwy 89, ESE of Lake Almanor at Crescent Mills 976 Comment
  UCR158614  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2004-6-20 8667 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCR173534  Rumex acetosella George K. Helmkamp, Elizabeth Helmkamp 2006-5-11 10403 Nevada Northern Sierra Nevada Foothills, San Juan Ridge area at North Columbia, c. 9.3 mi. east of Calif. Hwy 49 884 Comment
  UCR173960  Rumex acetosella George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-19 10730 El Dorado Northern Sierra Nevada Mountains, 0.8 mile east of Ice House Road on the road to Wright's Lake 1672 Comment
  UCR242642  Rumex acetosella George K. Helmkamp, E. A. Helmkamp 2011-6-17 17559 Calaveras Northern Sierra Nevada Mountains Foothills, Winton Road, 3.7 miles northeast of CA-26 at West Point 1012 Comment
  UCR257627  Rumex acetosella George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19524 Placer Northern Sierra Nevada Mountains, Sugar Bowl Road, 0.4 mile south of its junction with Donner Pass Road, just west of Lake Mary 2136 Comment
  SEINET4560905  Rumex conglomeratus George K. Helmkamp, E. A. Helmkamp 2011-1 17454 Nevada Northern Sierra Nevada Mountains Foothill: 3.25 miles SW (216 degrees) of French Corral, along Pleasant Valley Road, 3.3 miles south of its crossing of the South Fork Yuba River. 338 Comment
  UCR140142  Rumex conglomeratus George K. Helmkamp 2004-2-6 8242 San Luis Obispo Central Coast, entrance to Oso Flaco Lake, SW of Nipomo 6 Comment
  UCR250088  Rumex crispus George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20208 Calaveras Eastern San Joaquin Valley, Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  UCR104881  Rumex obtusifolius George K. Helmkamp, E. Helmkamp 1998-2-10 2687 Imperial Sonoran (Colorado) Desert, SE Salton Sea, vicinity of Wister, drainage ditch at the jct of Pound & Davis Streets. -66 Comment
  UCR173779  Rumex occidentalis George K. Helmkamp, Elizabeth Helmkamp 2006-5-20 10502 El Dorado Northern Sierra Nevada Foothills, Along Calif. Hwy 193, 0.8 mi. N of Kelsey 595 Comment
  UCR95918  Rumex salicifolius var. crassus George K. Helmkamp 1996-9-22 1200 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  UCR176041  Rumex salicifolius var. denticulatus George K. Helmkamp, E. A. Helmkamp 2006-7-28 11003 El Dorado Northern Sierra Nevada Mtns, Echo Summit along Hwy US-50; at entrance to the road maintenance station 2245 Comment
  UCD138033  Sagittaria latifolia G. K. Helmkamp; E. A. Helmkamp 2006-10-18 11533 El Dorado Northern Sierra Nevada Mountains Foothills: Diamond Springs; village along Hwy. CA-49 south of Placerville. 540 Comment
  HSC79025  Salazaria mexicana G. K. Helmkamp 1984-4-20 16 San Bernardino TNC Big Morongo Preserve, S of town of Morongo Valley in Big Morongo Canyon, beside pipeline road in upper part of TNC area 765 Comment
  UCR116699  Salix exigua George K. Helmkamp 1974-7-9 s.n. San Bernardino San Bernardino Mtns., Mill Creek Canyon, Thurman Flats Picnic Area, on Hwy 38 c. 3.5 mi. east of Mill Creek Ranger Station. 1037 Comment
  UCD111122  Salix laevigata G. K. Helmkamp; Elizabeth Helmkamp 2006-5-6 10307 Amador Northern Sierra Nevada foothills: middle of the city Jackson, 0.1 mile north of the junction of CA-49 and CA-88. 378 Comment
  UCR97564  Salix laevigata George K. Helmkamp, E. A. Helmkamp 1997-3-8 1437 San Luis Obispo NE of Los Osos. 4.5 mi. north of Los Osos Valley Rd on Turri Rd. 30 Comment
  UCR250085  Salix lasiolepis George K. Helmkamp 2013-3-9 20160 Sutter Northern Sacramento Valley, North Butte Road, 0.4 mile west of its junction with West Butte Road, NW foot of Sutter Buttes 24 Comment
  UCR202654  Salix lucida subsp. caudata George K. Helmkamp, E. A. Helmkamp 2008-8-8 13991 Alpine Northern Sierra Nevada Mountains, along CA-89, 1.4 miles east of Luther Pass 2262 Comment
  UCR121943  Salix planifolia subsp. planifolia George K. Helmkamp, E. A. Helmkamp 2000-7-19 5919 Inyo Sierra Nevada Mountains, Mosquito Flat, 0.9 mi south of Rock Creek Lake, beside Rock Creek 3140 Comment
  UCR123403  Salix planifolia subsp. planifolia George K. Helmkamp, E. A. Helmkamp 1998-8-12 4377 Inyo Eastern Sierra Nevada Mountains, Rock Creek Valley, 1.0 mi south of Rock Creek Lake 3110 Comment
  UCR171026  Salix scouleriana George K. Helmkamp, E. A. Helmkamp 2006-2-9 10060 Placer Northern Central Valley, English Colony Way [Humphrey Road] at Sierra College Blvd near Clover Valley Creek; SE of Lincoln 183 Comment
  HSC79245  Salsola australis G. K. Helmkamp 1983-10-8 - 23 Riverside 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
  UCR219189  Salsola tragus George K. Helmkamp, E. A. Helmkamp 2009-9-22 15641 Amador Sierra Nevada Mountains Foothills, junction of Shenandoah Road (CA-16) and Steiner Road, southwest of River Pines 750 Comment
  RSA518915  Salvia aethiopis George K. Helmkamp 1990-9-23 H- 5 Modoc [No location information provided on label.] 1341 Comment
  UCR122265  Salvia mellifera George K. Helmkamp, E. A. Helmkamp 2002-4-15 7365 Santa Barbara Western Transverse Range, Sierra Madre Mountains, Miranda Pine Road, 1.0 mi southeast of CA Hwy 166 549 Comment
  SD244179  Salvia sonomensis George K. Helmkamp, E. A. Helmkamp 2010-5-17 16059 El Dorado Northern Sierra Nevada Mountain Foothills: Pine Hill Road, 0.8 mile above the junction with Bertana Court; edge of Pine Hill Ecological Reerve (Shingle Springs 7.5'Q) 609 Comment
  UCR206932  Salvia sonomensis George K. Helmkamp, E. A. Helmkamp 2009-6-10 14925 Shasta Southern Cascade Range, KOA campground on the south side of CA-44, 4.0 miles east of Shingletown 1098 Comment
  UCR222547  Salvia sonomensis George K. Helmkamp, E. A. Helmkamp 2010-4-17 15892 El Dorado Sierra Nevada Mountains Foothills, Rattlesnake Bar Road, 8.0 miles southwest of its junction with CA-49 near Pilot Hill 322 Comment
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Apr 23 2012
  UCR103806  Salvia spathacea George K. Helmkamp 1997-3-8 1449 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
  UCR27484  Sambucus mexicana George K. Helmkamp 1982-9-17 s.n. Kern 5.5 mi above snow gate on road to Mt. Pinos 2287 Comment
  SD237279  Sambucus nigra subsp. caerulea G. K. Helmkamp, E. A. Helmkamp 2010-5-4 15961 Solano Saccramento Valley: NW edge of Vacaville, Vaca Valley Road, 0.1 mile west of its junction with Orchard Valley Road. 74 Comment
  IRVC28133  Sambucus racemosa var. racemosa G. K. Helmkamp, E. A. Helmkamp 2001-6-2 6783 San Mateo Purissima Crk Rd, E of Half Moon Bay at Purissima Crk, 3.2 mi E of CA-1. Central CA coast 244 Comment
  UCR197326  Sanguisorba annua George K. Helmkamp, E. A. Helmkamp 2008-7-11 13788 Amador Northern Sierra Nevada Mountains, south side of CA-88, 0.2 mile west of Carson Spur Summit 2421 Comment
  SD243200  Sanguisorba officinalis George K. Helmkamp, E. A. Helmkamp 2010-7-28 16640 Placer Northern Sierra Nevada Mountains: Forest Route 13 (American Hill Road), 1.8 miles south of the junction with Forest Hill Road. 1566 Comment
  UCR123339  Sanicula George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6894 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
  UCR134391  Sanicula arguta George K. Helmkamp, E. A. Helmkamp 2001-4-29 6584 San Luis Obispo Irish Hills, Clark Valley Rd., 4.2 miles south of Los Osos Valley Rd, E of Los Osos 274 Comment
  UCR195168  Sanicula bipinnatifida George K. Helmkamp, E. A. Helmkamp 2007-5-26 12095 Nevada Northern Sierra Nevada Mountains Foothills, along CA-49, 5.6 miles north of Nevada City 518 Comment
  RSA0042071  Sanicula crassicaulis George K. Helmkamp, Elizabeth A. Helmkamp 2013-5-24 20671 Calaveras Whiskey Slide Road, 2.6 miles south of its junction with Jesus Maria Road, 7.9 mi. SE (118 ) of Mokelumne Hill 561 Comment
  RSA667078  Sanicula crassicaulis George K. Helmkamp, E. Helmkamp 2001-6-2 6784 San Mateo Central CA coast: Purissima Crk Rd, E of Half Moon Bay at Purissima Crk, 3.2 mi E of CA-1 244 Comment
  UCR140775  Sanicula crassicaulis George K. Helmkamp 2004-4-14 8453 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR250900  Sanicula crassicaulis George K. Helmkamp, Elizabeth Helmkamp 2013-5-24 20671 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
  SD236166  Sanicula graveolens G. K. Helmkamp, E. A. Helmkamp 2008-7-16 13798 Alpine Northern Sierra Nevada Mountains: Woods Lake Road, 0.1 mile south of its junction with CA-88 2457 Comment
  UCR107332  Sanicula laciniata George K. Helmkamp, E. A. Helmkamp 1998-5-16 3726 Santa Clara San Francisco Bay Region, Sierra Azul hills along Hicks Rd at the S end of San Jose; beside Guadalupe Reservoir 201 Comment
  UCR217268  Sanicula tuberosa George K. Helmkamp, Mary Jane Ganive, Mary Alice Barnes 2010-6-15 16301 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 14 miles southeast of junction with Sly Park Road at Jenkinson Lake 1662 Comment
  UCR196796  Sarcodes sanguinea George K. Helmkamp 2008-6-17 13687 Amador Northern Sierra Nevada Mountains, Bear River Reservoir Road on the branch leading to Cole Creek, 2.7 miles east of Bear River Reservoir dam 1814 Comment
  UCR130616  Satureja douglasii George K. Helmkamp, E. A. Helmkamp 1999-5-21 4857 Monterey Santa Lucia Mountains, Willow Creek Rd 1.7 mi east of Calif. Hwy 1 north of Gorda 290 Comment
  SEINET11262704  Saxifraga californica George K. Helmkamp, E. A. Helmkamp 2012-4-27 18860 El Dorado Northern Sierra Nevada Mountains Foothills: Mosquito Road north of Placerville, at south side of the crossing of the South Fork American River (Slate Moutain 7.5' Q.).; 0 401 Comment
  UCR218137  Saxifraga californica George K. Helmkamp, Amy Barnes 2010-5-7 15997 Calaveras Sierra Nevada Mountains Foothills, Mountain Ranch Road, 3.2 miles east of San Andreas 436 Comment
  UCD137512  Scabiosa atropurpurea G. K. Helmkamp; E. A. Helmkamp 2007-7-23 12574 El Dorado Northern Sierra Nevada Mountains: Along Hwy CA-193, 1.0 mile south of Geogetown. 771 Comment
  SD240827  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2012-3-31 18664 Placer Northern Sierra Nevada Mountains Foothills: Old Foresthill Road, 0.7 mile northeast of its junction with CA-49 and the American River Crossing (Auburn 7.5'Q) 257 Comment
  UCR173166  Scandix pecten-veneris George K. Helmkamp, Elizabeth Helmkamp 2006-4-25 10219 El Dorado Northern Sierra Nevada Foothills, E of Sacramento and just SW of Placerville. Forni road between US Hwy 50 and Diamond Springs, at Weber Creek 488 Comment
  UCR206666  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2009-3-17 14390 Colusa Inner North Coast Ranges Foothills, along CA-16 and Bear Creek, 4.3 miles south of the junction with CA-20 261 Comment
  UCR217929  Scandix pecten-veneris George K. Helmkamp, Laurel Bezdecheck 2010-5-29 16148 El Dorado Sierra Nevada Mountains Foothills, along Perry Creek, about 0.2 mile south of Slug Gulch Road, at a point 4.7 miles east of junction with Perry Creek Road 1027 Comment
  UCR231882  Scandix pecten-veneris George K. Helmkamp, E. A. Helmkamp 2011-4-10 17138 Placer Sacramento Valley, east of Sheridan just north of the junction of North Kilaga Springs Road and Kilaga Springs Road 98 Comment
  UCR103362  Schismus arabicus George K. Helmkamp, E. Helmkamp 1998-1-24 2600 Imperial Sonoran (Colorado) Desert, 4.2 mi. north of Winterhaven on Picacho Rd, where the road crosses the canal. 91 Comment
  UCR95926  Schoenoplectus californicus George K. Helmkamp 1996-9-22 1203 San Luis Obispo Central Coast, along San Simeon Creek, c. 0.2 mile east of CA Hwy 1 6 Comment
  UCR132031  Schoenoplectus pungens var. badius George K. Helmkamp 2003-9-8 8132 San Luis Obispo Central Coast, Saltwater ocean inlet 0.2 mile SW of Oceano Airport 6 Comment
  UCR85436  Schoenoplectus pungens var. longispicatus George K. Helmkamp 1994-4-30 90- 3 San Bernardino Mojave Desert, Afton Canyon. Bottom of the wash leading W from the public camp along the Mojave River 457 Comment
  UCD141251  Scirpus microcarpus G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11007 El Dorado Northern Sierra Nevada Mountains: Echo Summit along Hwy US-50; at entrance to the road maintenance station. 2245 Comment
  UCR206943  Scirpus microcarpus George K. Helmkamp, E. A. Helmkamp 2009-6-11 14962 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
  UCR258988  Scirpus microcarpus George K. Helmkamp, Amy Barnes 2014-9-16 23074 Alpine Eastern Sierra Nevada Mountains, Paynesville, junction of Chambers Lane and Diamond Valley Road along West Fork Carson River 1593 Comment
  UCR207132  Scleranthus annuus George K. Helmkamp, E. A. Helmkamp 2009-4-4 14492 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
  SD257238  Scleranthus annuus subsp. annuus George K. Helmkamp, Elizabeth Helmkamp 2013-5-2 20451 El Dorado Sierra Nevada Mountains Foothills: Happy Valley Road, 0.6 mile east of its junction with Mt. Aukum Road, 1.65 air miles NE of Somerset. 665 Comment
  RSA755623  Scutellaria californica George K. Helmkamp, E. A. Helmkamp 2009-5-28 14866 Sierra above the Yuba River along CA-49, 2.3 miles north of the Yuba Co. line 851 Comment
  UCR194913  Scutellaria californica George K. Helmkamp, E. A. Helmkamp 2007-5-27 12152 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-A1045-583  Senecio douglasii George K. Helmkamp 1977-5-17 San Bernardino Mojave Desert southeast edge of mountians, near Kelbaker Road; ; Flynn 15'Q 1097 Comment
  UCR146845  Senecio flaccidus var. douglasii George K. Helmkamp, E. A. Helmkamp 2004-9-23 8805 Santa Barbara San Rafael Mountains., Figueroa Mountain Road, 8.5 mi NE of Los Olivos 587 Comment
  UCR219040  Senecio integerrimus var. major George K. Helmkamp, E. A. Helmkamp 2010-7-13 16517 Amador Northern Sierra Nevada Mountains, between the west shore of Silver Lake and CA-88; lakeside rest stop area 2235 Comment
  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
  RSA757542  Senecio triangularis George K. Helmkamp, Amy Barnes 2009-7-8 15163 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
  SEINET3245751  Senecio triangularis G. K. Helmkamp, E. A. Helmkamp 2007-1 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
  SEINET3258007 Image available Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2008-3-12 13152 Amador Sierra Nevada Mountains Foothills; Middle Bar Road, 3.2 miles south of its junction with CA-49 at Scottsville. 229 Comment
  SEINET3411982 Image available Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-2-17 18549 Sacramento Sacramento Valley: along Scott Road, 2.67 miles S of its junction with White Rock Road, south of Folsom Lake and Hwy 50 76 Comment
  UCR102517  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 1997-3-6 1366 Kern Tehachapi Mtns./San Joaquin Valley, [Edmonston] Pumping plant road c. 5 mi. east of Grapevine near Pastoria Creek 399 Comment
  UCR238901  Senecio vulgaris George K. Helmkamp, E. A. Helmkamp 2012-2-3 18521 Stanislaus San Joaquin Valley, junction of Sonora Road and Milton Road, 17 km NE (50 deg. ) of Escalon 58 Comment
  UCR253475  Senecio vulgaris George K. Helmkamp 2014-3-11 22538 Nevada Sierra Nevada Mountains Foothills, Auburn, southbound on CA-49 about 0.1 mile east of Lincoln Way 402 Comment
  UCR258388  Sericocarpus oregonensis George K. Helmkamp, Amy Barnes 2014-8-11 22987 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 1.7 miles south of Crystal Basin Information Station 1610 Comment
  UCR172670B  Sherardia arvensis George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10179 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest, Along Calif. Hwy 193, just N of Kelsey, south of Gopher Hill 610 Comment
  UCR189034  Sidalcea glaucescens George 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
  UCR189180  Sidalcea glaucescens George K. Helmkamp 2007-7-7 12497 Alpine Northern Sierra Nevada Mountains, Blue Lake Road, 5.2 miles south of its junction with CA-88; south end of Hope Valley area near Red Lake Creek 2189 Comment
  UCR196800  Sidalcea glaucescens George K. Helmkamp, E. A. Helmkamp 2008-6-3 13585 El Dorado Sierra Nevada Mountains, Forbay Road, 4.8 miles northwest of its junction with CA-50 at Pollock Pines 965 Comment
  CHSC118019  Sidalcea hartwegii G. K Helmkamp; E. A Helmkamp 2007-4-20 11763 El Dorado Foothills, Northern Sierra Nevada Mountains; 2.2 miles north of US-50 on Bass Lake Road, overlooking Bass Lake; between El Dorado Hills and Cameron Park. 384 Comment
  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
  UCD116737  Sidalcea hartwegii G. K. Helmkamp; E. A. Helmkamp 2007-4-20 11763 El Dorado Northern Sierra Nevada Mountains, 2.2 miles north of US-50 on Bass Lake Road, overlooking Bass Lake, between El Dorado Hills and Cameron Park. 384 Comment
  UCR256514  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
  SEINET273099  Sidalcea malviflora G. K. Helmkamp, E. A. Helmkamp 1997-6-26 2162 Mendocino Fort Bragg 6 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
  UCR173250  Silene californica George K. Helmkamp, Elizabeth Helmkamp 2006-5-13 10457 Placer Northern Sierra Nevada Foothills, c. 4 air mi. NE of Auburn, along an unnamed road to Lake Clementine, 1.2 mi. N of Forest Hill Road 422 Comment
  UCR222363  Silene californica George K. Helmkamp, Mary Alice Barnes, Mary Jane Ganive 2010-6-13 16276 El Dorado Sierra Nevada Mountains Foothills, along Forebay Road, 2.1 miles northwest of the Forebay Bridge over South Fork American River 828 Comment
  UCR224247  Silene gallica George K. Helmkamp, E. A. Helmkamp 2010-4-23 15903 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
  UCR93699  Silene gallica George K. Helmkamp 1996-5-25 1059 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
  CAS-BOT-BC229021  Silene verecunda George K. Helmkamp; Ann Kerchner; Amy Barnes 2011-8-13 18058 Calaveras Northern Sierra Nevada Mountains: Black Springs Road (Forest Route 6N45?), 1.7 miles north of its junction with CA Hwy 4 2058 Comment
  UCR27485  Silene verecunda George K. Helmkamp 1982-9-17 s.n. Kern 4.2 mi. above snow gate on the road to Mt. Pinos 2134 Comment
  UCR217863  Sisymbrium altissimum George K. Helmkamp, E. A. Helmkamp 2010-7-9 16476 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
  OBI37413  Sisymbrium irio G. Helmkamp 1985-3-9 2 San Luis Obispo Big Morongo Preserve. the Nature Conservancy. In front of manager's residence Comment
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Jul 24 2014
  UCR140494  Sisyrinchium bellum George K. Helmkamp 2004-4-21 8466 Santa Barbara San Rafael Mountains, Pintado Creek, 8.5 mi N of Los Olivos along Figeroa Mtn Rd. 412 Comment
  UCR196940  Smilacina racemosa George K. Helmkamp, E. A. Helmkamp 2008-6-3 13553 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
  UCR18564  Solanum americanum George K. Helmkamp 1974-10-18 s.n. Madera Manzanita Lake, at the parking lot Comment
  HSC79244  Solanum douglasii G. K. Helmkamp 1983-10-8 - 9 San Bernardino Big Morongo Preserve of The Nature Conservancy, Morongo Valley, near the house in the San Bernardino Co. owned area. 762 Comment
  UCR159234  Solanum douglasii George K. Helmkamp, E. A. Helmkamp 2004-7-14 8761 Santa Barbara Central Coast, Along Jalama Rd about 12 mi SW of its junction with Calif. Hwy 1 (SW of Lompoc) 128 Comment
  UCD127018  Solanum umbelliferum G. K. Helmkamp; E. A. Helmkamp 2001-4-27 6556 Kern Temblor Range, CA-58, 1.1 mi SW of the San Luis Obispo Co. line. 792 Comment
  UCR102148  Solanum umbelliferum George K. Helmkamp, E. A. Helmkamp 1998-5-14 3674 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  VVC107  Solidago californica G. K. Helmkamp 1995-10-28 1 -6 San Bernardino San Bernardino Mtns, Arrastre Cteek 1/2 mile NE of CA 38 on Round Valley Rd (2N01), 6.5 mi SE of Big Bear City 2439 Comment
  UCR123335  Solidago canadensis subsp. elongata George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6887 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
  UCR258130  Solidago canadensis subsp. elongata George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-8-4 19550 Amador Northern Sierra Nevada Mountains, West Lake Road along the west side of Silver Lake; 4.1 miles north of junction with Plasse Road 2247 Comment
  UCR18620  Solidago occidentalis George K. Helmkamp 1974-10-18 s.n. Madera Sierra Nevada Mtns. Foothills, Fresno River at Yosemite Forks 854 Comment
  UCR67459  Solidago occidentalis George K. Helmkamp 1990-9-23 G- 10 Lassen north of Ravendale 1677 Comment
  UCR122358  Solidago spathulata var. spathulata George K. Helmkamp, E. A. Helmkamp 2001-7-8 7023 Humboldt North Coast, Samoa Peninsula, 2.6 miles south of CA Hwy 255 bridge across Humboldt Bay 15 Comment
  UCR60014  Solidago spectabilis 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
  UCR146828  Sorghum bicolor George K. Helmkamp, E. A. Helmkamp 2004-10-8 8843 San Luis Obispo Central Coast, Biddle Regional Park, 7 mi NE of Arroyo Grande along Lopez Drive and Arroyo Grande Creek 136 Comment
  UCD99163  Spergula arvensis G. K. Helmkamp 2004-3-15 8364 San Luis Obispo San Luis Obispo County: edge of Nipomo Mesa overlooking Cienaga Valley, along CA-1 (Mesa View Dr.), 0.3 mile N of Halcyon Road. 76 Comment
  SD143955  Spergularia marina G. Helmkamp 1997-2-1 1294 Imperial Imperial Valley: southwest of Niland along Sinclair Road just east of Hatfield Road Comment
  UCR103609  Spergularia marina George K. Helmkamp 1997-2-1 1294 Imperial Sonoran (Colorado) Desert, Imperial Valley, SW of Niland along Sinclair Rd and just east of Hatfield Rd. -55 Comment
  UCR37619  Spergularia marina George K. Helmkamp 1984-5-2 D- 30 Riverside Little San Bernardino Mountains, Big Morongo Canyon, 3 - 3.5 miles below the caretaker's house at the Big Morongo Preserve 610 Comment
  UCR106438  Spergularia rubra George K. Helmkamp, E. A. Helmkamp, A. Kerchner 1997-6-26 2163 Mendocino North Coast, Glass Beach, Fort Bragg 6 Comment
  UCR127071  Spergularia rubra George K. Helmkamp, E. A. Helmkamp 1998-5-19 3856 Monterey Reservoir area., San Antonio Rd 0.7 mi north of G-14 (Interlake Rd between San Antonio and Nacimiento reservoirs) 335 Comment
  CLARK-A1045-847  Sphaeralcea ambigua George K. Helmkamp 1977-5-29 San Bernardino Mesquite Mountains Clark Mt. 15'Q Comment
  SEINET3259915 Image available Sphenosciadium capitellatum George K. Helmkamp, E. A. Helmkamp 2008-8-8 13992 Alpine Northern Sierra Nevada Mountains; along CA-89, 1.4 miles east of Luther Pass. 2262 Comment
  UCR218249  Spiraea densiflora George K. Helmkamp, E. A. Helmkamp 2010-7-23 16591 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
  SEINET244285  Stachys ajugoides var. rigida G. K. Helmkamp, E. A. Helmkamp 2000-6-19 5766 Mendocino North Coast redwood forest: CA-20 (Fort Bragg- Willits Rd) 6.8 mi E of US-1 (S of Fort Bragg). 152 Comment
  UCR215778  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2009-7-30 15355 Calaveras Northern Sierra Nevada Mountains, Forestry Route 6N45, just north of its junction with CA-44, 15.1 miles northeast of Arnold 2018 Comment
  UCR231860  Stachys ajugoides var. rigida George K. Helmkamp, E. A. Helmkamp 2010-8-11 16759 Placer Northern Sierra Nevada Mountains, Finning Mill Road, 2.3 miles north of Forest Hill Road at the crossing of McBride Creek 1082 Comment
  CLARK-A1045-1335  Stachys bullata George K. Helmkamp 1978-4-22 San Luis Obispo Los Padres National Forest Cerro Alto Camground; Atascadero 7.5'Q Comment
  UCR130735  Stachys rigida var. quercetorum George K. Helmkamp, E. A. Helmkamp 1999-6-27 4951 Santa Clara San Francisco Bay Region, Sierra Azul, Mt.Umunhum Rd 1/2 mi from Hicks Rd., 1/2 mi west of Bald Mtn., 4 mi south of San Jose & 2 mi west of Almaden Reservoir 732 Comment
  UCR158191  Stachys rigida var. quercetorum George K. Helmkamp 2004-6-12 8629 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-BC386947  Stellaria media G. 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
  SD234357  Stellaria media G. K. Helmkamp, E. A. Helmkamp 2006-3-19 10094 Amador Northern Sierra Nevada Foothills: Along CA Highway 49 S of Plymouth (Amador City 7.5' Q) 323 Comment
  UCR140371  Stellaria media George K. Helmkamp 2004-3-21 8384 San Luis Obispo Central Coast, Mesa Dunes Mobile Home Park along Mesa View Dr., 0.2 mi south of the junction of Halcyon Rd., SE of Oceano 61 Comment
  UCR161247  Stellaria media George K. Helmkamp, E. A. Helmkamp 2005-2-9 8880 Santa Barbara Outer South Coast Ranges, south edge of Sierra Madre Mtns north of Sisquoc; 1.6 mi north of Foxen Canyon Road along Tepusquet Road 171 Comment
  UCR161300  Stellaria media George K. Helmkamp, E. A. Helmkamp 2005-3-9 9099 San Luis Obispo Outer Central Coast Hills, Irish Hills; See Canyon, 1.0 mi N of San Luis Bay Drive 43 Comment
  UCR171735  Stellaria media George K. Helmkamp, E. A. Helmkamp 2006-2-9 10059 Placer Northern Central Valley, English Colony Way [Humphrey Road] at Sierra College Blvd near Clover Valley Creek; SE of Lincoln 183 Comment
  UCR233014  Stellaria media George K. Helmkamp, E. A. Helmkamp 2011-5-12 17274 Sutter Sacramento Valley, Garden Highway at the junction with Garwood Road, c. 1 mi. SW of Nicolaus 11 Comment
  UCR161696  Stellaria nitens George K. Helmkamp, E. A. Helmkamp 2005-3-8 9054 San Luis Obispo Coastal Hills, Prefumo Canyon, north side of Irish Hills; 2.2 mi west of Los Osos Valley Road 122 Comment
  UCR233315  Stephanomeria George K. Helmkamp, E. A. Helmkamp 2011-9-1 18215 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
  UCR132150  Stephanomeria spinosa George K. Helmkamp, E. A. Helmkamp 1993-7-28 185 Mono Sierra Nevada Mountains, Long Valley mesa at the junction of Owens River Road and Lake Crowley 2104 Comment
  UCR248404  Stipa occidentalis var. pubescens George K. Helmkamp, Elizabeth Helmkamp 2013-7-22 21099 A El Dorado Northern Sierra Nevada Mountains, Hell's Delight Road, just west of the junction with Silver Fork Road, 2.8 miles north of CA-88 2006 Comment
  UCR121953  Stipa pinetorum George K. Helmkamp, E. A. Helmkamp 1998-8-11 4291 Inyo White Mountains, along White Mtn. Rd. and west of the Bristlecone Pine boundary; 0.5 miles northwest of Shulman Grove 3079 Comment
  UCR214833  Stipa pulchra George K. Helmkamp, E. A. Helmkamp 2005-3-14 9159 Santa Barbara South Outer Coast Ranges, San Rafael Mountains; Figueroa Mountain Road, 6.2 mi. NNE of Los Olivos 402 Comment
  SEINET10792047  Stipa thurberiana George K. Helmkamp, E. A. Helmkamp 2013-8-14 Helmkamp 22197 Alpine Northern Sierra Nevada Mountains; along CA-89, 1.9 mile E of Monitor Pass, then 0.1 mile SW on an unnamed dirt road (Topaz Lake 7.5' Quad.). 2846 Comment
  UCR122402  Streptanthus diversifolius George K. Helmkamp, E. A. Helmkamp 2002-4-23 7528 Madera Western Sierra Nevada foothills, 2.5 miles north of Oakhurst along CA Hwy 41 762 Comment
  CLARK-A1045-1438  Streptanthus tortuosus var. orbiculatus George K. Helmkamp 1977-8-6 Mariposa Sierra Nevada 2 miles east of Yosemite Creek, roadside; Yosemite Falls 7.5'Q Comment
  UCR140779  Styrax officinalis var. redivivus George K. Helmkamp 2004-4-14 8439 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR176427  Symphoricarpos albus var. laevigatus George K. Helmkamp, E. A. Helmkamp 2006-8-7 11158 El Dorado Northern Sierra Nevada Mountains, Mormon Emigrant Trail, 16.7 miles east of its junction with Sly Park Road 1944 Comment
  RSA0035729  Symphoricarpos rotundifolius George K. Helmkamp, Elizabeth A. Helmkamp 2013-8-14 22187 Alpine along CA-89, 1.3 miles southwest of Monitor Pass 2503 Comment
  UCD136644  Symphyotrichum spathulatum var. intermedium G. K. Helmkamp; E. A. Helmkamp 2006-7-28 11006 El Dorado Northern Sierra Nevada Mountains: Echo Summit along Hwy US-50; at entrance to the road maintenance station. 2245 Comment
  CAS-BOT-BC249055  Symphyotrichum spathulatum var. spathulatum George K. Helmkamp; E. A. Helmkamp 2010-8-26 16834 Nevada Northern Sierra Nevada Mountains: South Fork Yuba River, Forest Route 85 (Fordyce Lake Rd) north of Hampshire Rocks Road and I-80, 1 mi. NNW (351 deg. ) of Cisco 1634 Comment
  CAS-BOT-BC249056  Symphyotrichum spathulatum var. spathulatum George K. Helmkamp; E. A. Helmkamp 2010-9-1 16896 El Dorado Northern Sierra Nevada Mountains: Mehrten Springs Road, 0.6 mile north of its junction with CA-88 2018 Comment
  CAS-BOT-BC249063  Symphyotrichum spathulatum var. spathulatum George K. Helmkamp; E. A. Helmkamp 2011-9-24 18331 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
  UCR176000  Symphyotrichum spathulatum var. spathulatum George K. Helmkamp, E. A. Helmkamp 2006-7-28 11039 El Dorado Northern Sierra Nevada Mtns, 2.5 miles south of Hwy US-50, beside Phillips on Sierra-at-Tahoe Rd 2226 Comment
  CAS-BOT-BC526865  Taeniatherum caput-medusae George K. Helmkamp; Elizabeth Helmkamp 2013-5-30 20720 Nevada Northern Sierra Nevada Mountains Foothills: along Hwy CA-20, 3.5 mi W of CA-49 in Grass Valley 623 Comment
  UCR104009  Tamarix ramosissima George K. Helmkamp 1998-4-4 3094 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
  UCR140778  Tauschia arguta George K. Helmkamp 2004-4-14 8440 Santa Barbara Santa Inez Mountains, Cold Spring Canyon, along Stagecoach Rd just off Hwy 154, c. 5 miles SE of Lake Cachuma 610 Comment
  UCR233640  Tellima grandiflora George K. Helmkamp, E. A. Helmkamp 2011-6-9 17497 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
  UCR245591  Thlaspi arvense George K. Helmkamp, Elizabeth Helmkamp 2013-8-14 22202 Alpine Northern Sierra Nevada Mountains, Ebbets Pass, along CA-4, 4.8 miles west of its junction with CA-89 1924 Comment
  RSA667075  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2001-4-27 6552 Kern Temblor Range: CA-58, 1.1 mi SW of the San Luis Obispo Co. line. 793 Comment
  UCR122268  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2002-4-15 7367 Santa Barbara Western Transverse Range, Sierra Madre Mountains, Miranda Pine Road, 1.0 mi southeast of CA Hwy 166 549 Comment
  UCR206353  Thysanocarpus curvipes George K. Helmkamp, E. A. Helmkamp 2009-3-11 14375 Colusa Inner North Coast Range Foothills, along CA-20, 14.3 miles southwest of Williams 375 Comment
  UCR123202  Tiquilia nuttallii George K. Helmkamp, E. A. Helmkamp 1993-6-16 158 Inyo Owens Valley, 2 mi east of Pleasant Valley Campground along Chalk Bluff Road, NW of Bishop 1280 Comment
  RSA779397  Torilis arvensis George K. Helmkamp, Amy Barnes 2009-7-12 15189 Placer along Todd Valley Road, 0.1 mile south of its junction with Foresthill Road, c. 13 air miles NE of Auburn 854 Comment
  SEINET9262004  Torilis arvensis George K. Helmkamp, Amy Barnes 2013-1 22316 Calaveras Sierra Nevada Mountains Foothills: Utica Powerhouse Road (beside Angel's Creek) 0.6 mile northeast of its junction with CA-4 (Murphys 7.5 Q 974 Comment
  UCR257012  Torilis arvensis George K. Helmkamp, Mary Alice Barnes 2013-5-13 20566 Amador Sierra Nevada Mountains Foothills, along E-16/Shenandoah Rd., 3.6 road miles south of River Pines, 4.15 air miles NE (39 deg. ) of Plymouth 517 Comment
  SEINET11266388  Torilis nodosa George Helmkamp, E. A. Helmkamp 2011-5-19 17315 Calaveras Sierra Nevada Foothills: Paloma Road, 3.1 miles southwest of its junction with CA - 26, 4 miles NE (34 degree) of Valley Springs (Valley Spring 7.5'); 0 352 Comment
  SEINET273070  Torilis nodosa G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3684 Santa Clara Sierra Azul: Hicks Rd at S end of San Jose; 3.2 mi S of Camden Ave. 152 Comment
  SEINET4560805  Torilis nodosa George K. Helmkamp, E. A. Helmkamp 2011-1 17793 Nevada Northern Sierra Nevada Mountains Foothills: You Bet Road just northeast of its junction with CA-174, 1.25 mi east (91 degrees) of Peardale 778 Comment
  UCR205999  Tragopogon dubius George K. Helmkamp, E. A. Helmkamp 2009-6-3 14876 El Dorado Sierra Nevada Mountains Foothills, Pony Express Trail, 0.7 mile east of its junction with Sly Park Road in Pollock Pines 851 Comment
  UCR258173  Tragopogon dubius George K. Helmkamp, Ann Kerchner, Amy Barnes 2012-7-23 19483 Nevada Northern Sierra Nevada Mountains, Stampede Meadows Road, c. 0.65 mile south of the Sierra County line 1738 Comment
  UCR175429  Tragopogon porrifolius George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-3 10611 El Dorado Northern Sierra Nevada foothills, city park at the east end of Shingle Springs, along Pleasant Valley Road 433 Comment
  CDA25234  Tribulus terrestris G. K. Helmkamp, E. A. Helmkamp 2007-10-13 13094 San Joaquin Northern San Joaquin Valley; Along Highway CA-88, 1.0 mile southwest of Clements at Disch Road. Comment
  UCR30079  Trichoptilium incisum George K. Helmkamp 1983-4-5 483 39 Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, large wash below Chuckwalla Spring, 9 miles SW of Graham Pass Road 489 Comment
  UCR103956  Trichostema lanatum George K. Helmkamp 1997-6-21 2070 San Luis Obispo Central Coast, Questa Ridge north of San Luis Obispo and 0.4 mi west of radio towers 854 Comment
  UCR179741  Trichostema lanceolatum George K. Helmkamp, E. A. Helmkamp 2006-10-18 11530 El Dorado Northern Sierra Nevada Mountains Foothills, Diamond Springs; village along Calif. Hwy 49 south of Placerville 540 Comment
  SBBG103919  Trichostema micranthum G. K. Helmkamp 1993-9-22 36 -2 San Bernardino 16.4 mi up Burns Cyn from jct of Pipes Cyn and Pioneer Town Rds 2194 Comment
  UCR206937  Trientalis latifolia George K. Helmkamp, E. A. Helmkamp 2009-6-10 14929 Shasta Southern Cascade Range, KOA campground on the south side of CA-44, 4.0 miles east of Shingletown 1098 Comment
  SBBG129010  Trientalis latifolia G. K. Helmkamp, E. A. Helmkamp 2012-5-18 19005 El Dorado junction of Bonnetti Rd (Capps Crossing Rd) and Mormon Emigrant Trail, E of Jenkinson Lake 1261 Comment
  SD227822  Trifolium G. K. Helmkamp, E. A. Helmkamp 1998-5-16 3744 San Mateo Portola Valley: Golden Hills Rd along Los Trancos Creek. 106 Comment
  RSA709319  Trifolium albopurpureum var. albopurpureum George K. Helmkamp 2004-4-23 8532 Santa Barbara San Rafael Mountains: Figueroa Mountain Rd., 15.0 Owens peak region, Gold Canyonmi NE of Los Olivos. 1341 Comment
  SD239755  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
  UCR235640  Trifolium ciliolatum George K. Helmkamp, E. A. Helmkamp 2012-4-30 18885 El Dorado Northern Sierra Nevada Mountains Foothills, Mosquito Road, 2.4 mile north of the bridge over the South Fork American River 694 Comment
  UCR57524  Trifolium cyathiferum 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
  SBBG129036  Trifolium dubium G. K. Helmkamp, E. A. Helmkamp 2012-5-31 19086 Calaveras CA-26, 2.2 km NE (63 deg) of Glencoe, 0.8 mi W of the crossing over the S Fork Mokelumne River 741 Comment
  SD243144  Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2011-4-10 17152 Placer Sacremaento Valley: along Riosa Road at the east edge of the village of Sheridan (Lincoln 7.5'Q) 41 Comment
  UCR191049  Trifolium dubium George K. Helmkamp, E. A. Helmkamp 2007-6-8 12285 El Dorado Northern Sierra Nevada Mountains, Bonetti Road, 1.9 miles south of Mormon Emigrant Trail, at the bridge over Diamond Creek 1143 Comment
  UCR253553  Trifolium dubium George K. Helmkamp, Amy Barnes 2014-4-23 22805 Placer Sierra Nevada Mountains Foothills, Spring Garden Road, at the north side of its junction with Foresthill Road, 8.4 km west of Foresthill 720 Comment
  UCR258213  Trifolium dubium George K. Helmkamp, Amy Barnes 2013-3-28 20263 Yuba Eastern Sacramento Valley, northbound exit road from CA-65, connecting with Forty Mile Road 30 Comment
  CDA36257  Trifolium hirtum G. K. Helmkamp, E. A. Helmkamp 2009-5-2 14754 Colusa Inner North Coast Ranges; Along CA-16, 1.8 miles north of the Yolo County line. Comment
  SD212624  Trifolium hirtum G. K. Helmkamp, Elizabeth Helmkamp 2006-5-6 10301 Amador Along Highway CA 49, 0.3 mile south of Drytown. 226 Comment
  SD243145  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2011-5-21 17323 Calaveras Northern Sierra Nevada Mountains Foothills: Ridge Road, 1.9 road miles southeast of CA-26, 1.8 air miles southeast (130a^z) of Glencoe (Rail Road Flat 7.5'Q) 863 Comment
  UCD111152  Trifolium hirtum G. K. Helmkamp; Elizabeth Helmkamp 2007-4-23 11816 Amador Northern Sierra Nevada Mountains: junction of Tonzi Road and CA-124 about 7 miles north of Ione. 229 Comment
  UCR122471  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 1998-5-20 3897 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
  UCR217885  Trifolium hirtum George K. Helmkamp, E. A. Helmkamp 2010-5-22 16090 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
  SEINET269520 Image available Trifolium hirtum G. Helmkamp 1994-5-18 91 -18 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
  UCR122464  Trifolium incarnatum George K. Helmkamp, E. A. Helmkamp 1998-5-20 4005 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
  RSA785391  Trifolium microcephalum George K. Helmkamp, E. A. Helmkamp 2010-6-23 16345 Amador Sutter Creek Road, 7.2 miles northeast of its junction with old CA-49 in Sutter Creek village 473 Comment
  SBBG129048  Trifolium microcephalum G. K. Helmkamp, E. A. Helmkamp 2013-6-15 20875 El Dorado Silver Fork Rd, 2.3 mi S of its jct with US-50 in Kyburz 1454 Comment
  UCD109233  Trifolium obtusiflorum G. K. Helmkamp; E. A. Helmkamp 2005-7-31 9717 El Dorado Northern Sierra Nevada Foothills: Junction of Ice House Road and CA Highway 50 (E of Pollock Pines). 1006 Comment
  UCR171041  Trifolium obtusiflorum George K. Helmkamp, E. A. Helmkamp 2005-7-31 9717 El Dorado Northern Sierra Nevada Foothills, Junction of Ice House Road and Calif. Highway 50, east of Pollock Pines 1006 Comment
  UCR257764  Trifolium pratense George K. Helmkamp, Amy Barnes 2014-7-28 22941 El Dorado Sierra Nevada Mountains Foothills, Lake Walton beside Balderston Road; 1/4 mile south of Wentworth Springs Road 966 Comment
  UCR121500  Trifolium repens George K. Helmkamp, E. A. Helmkamp 2000-6-19 5774 Mendocino North Coast Range, Calif. Hwy 20 (Fort Bragg-Willits Rd) 6.8 mi east of US-1, southeast of Fort Bragg 152 Comment
  UCD109854  Trifolium willdenovii G. K. Helmkamp; Elizabeth Helmkamp 2006-5-9 10354 Amador Northern Sierra Nevada Foothills: Along CA Hwy 88, 0.9 mi. S of the El Dorado County line at Enterprise. 274 Comment
  UCR107296  Trifolium willdenovii George K. Helmkamp, E. A. Helmkamp 1998-5-14 3661 Monterey Along Calif. Hwy 25, 17.6 mi. NE of the jct with Calif. Hwy 198 488 Comment
  UCR208606  Trifolium willdenovii George K. Helmkamp, E. A. Helmkamp 2009-5-7 14618 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 9.8 miles east of its junction with Forest Hill Road in Foresthill 433 Comment
  UCR224242  Trifolium willdenovii George K. Helmkamp, E. A. Helmkamp 2010-4-24 15937 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
  CLARK-A1045-1152  Trifolium wormskioldii George K. Helmkamp 1977-9-1 VC Alpine Sierra Nevada roadside seep; ; Freel Peak 7.5'Q 2346 Comment
  UCR123338  Trifolium wormskioldii George K. Helmkamp, Elizabeth Helmkamp 2001-7-7 6889 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
  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
  UCD139890  Trillium angustipetalum G. 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). 1508 Comment
  UCR249533  Triphysaria eriantha George K. Helmkamp, Amy Barnes 2013-3-28 20285 Placer Eastern Sacramento Valley, along 10th Street/Ranch House Rd., 0.6 mile south of its junction with Riosa Road in Sheridan 43 Comment
  UCR249566  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 319 Comment
  UCR250186  Triphysaria eriantha George K. Helmkamp 2013-3-1 20152 Placer Sacramento Valley, Ranch House Road, 0.6 mile southeast of Riosa Road in Sheridan 37 Comment
  UCR207832  Triphysaria eriantha subsp. eriantha George K. Helmkamp, E. A. Helmkamp 2009-3-26 14462 San Joaquin San Joaquin Valley, junction of Collier Road and CA-88, about 0.2 mile north of the Mokelumne River 43 Comment
  UCR250089  Triphysaria eriantha subsp. eriantha George K. Helmkamp, Elizabeth Helmkamp 2013-3-26 20207 Calaveras Eastern San Joaquin Valley, Milton, Jenny Lind Road (Milton Rd.), 7.4 miles south of its junction with CA-26 120 Comment
  SEINET11261457  Triphysaria versicolor subsp. faucibarbata George Helmkamp, E. A. Helmkamp 2011-4-10 17158 Placer In Sacramento Valley along Riosa Road at the E edge on the village of Sheridan.; 0 41 Comment
  UCR207837  Triphysaria versicolor subsp. faucibarbata George K. Helmkamp, E. A. Helmkamp 2009-3-26 14465 San Joaquin San Joaquin Valley, along Tully Road, 0.1 mile north of its junction with Kettleman Lane, 3.8 miles south of CA-88 in Lockeford 24 Comment
  RSA519132  Trisetum spicatum George K. Helmkamp 1990-8-3 s.n. Mono Barren, at the top of Mammoth Mountain. 3354 Comment
  UCR194883  Triteleia George K. Helmkamp, E. A. Helmkamp 2007-5-26 12107 Nevada Northern Sierra Nevada Mountains Foothills, Tyler Foote Crossing Road, 1.7 miles northeast of CA-49 617 Comment
  SD240797  Triteleia hyacinthina George K. Helmkamp, E. A. Helmkamp 2011-4-10 17164 Yuba Sacramento Valley: along Camp Beale Highway.Spenceville Road, c. 1.75 miles northeast of Wheatland (Wheatland 7.5'Q) 43 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
  SEINET3889062  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 2010-5-17 16051 El Dorado Sierra Nevada Mountains Foothills: Pine Hill Road at the junction with Bertana Court: southeast edge of State Ecological Preserve, 1.6 mi NW (2931/4) of Rescue (Shingle Springs 7.5').; 0 459 Comment
  UCR107337  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 1998-5-16 3702 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
  UCR230072  Triteleia laxa George K. Helmkamp, E. A. Helmkamp 2011-5-19 17316 Calaveras Sierra Nevada Foothills, Paloma Road, 3.1 miles southwest of its junction with CA-26, 4 miles NE (34 deg. ) of Valley Springs 352 Comment
  UCR242771  Triticum aestivum George K. Helmkamp, E. A. Helmkamp 2010-4-14 15858 Solano Northern San Joaquin Valley, Tremont Road, 0.8 mile west of Mace Blvd, 3.8 mi. (air) SE of Davis 3 Comment
  UCD94866  Typha latifolia G. K. Helmkamp; E. A. Helmkamp 2007-9-30 13057 Sutter Sacramento Valley. Sacramento Ave. on the east side of CA-99, junction 1.4 miles north of the Feather River. 21 Comment
  UCR172660  Umbellularia californica George K. Helmkamp, Elizabeth Helmkamp 2006-4-13 10187 El Dorado Northern Sierra Nevada Foothills, El Dorado National Forest, along Volcanoville Road, 7.7 mi N of Wentworth Springs road (NE of Georgetown) 915 Comment
  UCSB69269  Umbellularia californica Helmkamp, G.; Helmkamp, E. 2007-3-11 El Dorado Foothills; Northern Sierra Nevada Mountains; Traverse Creek Road at the creek crossing; 2.4 miles northeast of CA-193 (Garden Valley 7.5') 518 Comment
  SEINET2442331  Urtica dioica George K. Helmkamp, E. A. Helmkamp 2009-8-4 15366 Alpine Sierra Nevada Mountains: along CA-4 at milepost 30, 1.6 miles south of its junction with CA-89; along East Fork Carson River (heenan Lake 7.5' Q). 1786 Comment
  UCR258991  Urtica dioica George K. Helmkamp, Amy Barnes 2014-9-16 23071 Alpine Eastern Sierra Nevada Mountains, Paynesville, junction of Chambers Lane and Diamond Valley Road along West Fork Carson River 1593 Comment
  UCR262431  Urtica urens George K. Helmkamp, E. A. Helmkamp 2012-1-13 18511 Sacramento Southern Sacramento Valley/lower Sierra Nevada Foothills, Michigan Bar Road 0.9 mile north of Jackson Road (CA-16) and just south of the Michigan Bar bridge 85 Comment
  SD239951  Valeriana californica George K. Helmkamp, Ann Kerchner, Amy Barnes 2011-8-13 18073 Alpine Northern Sierra Nevada Mountains: south side of Bear Valley Village, along CA Hwy 4. 2168 Comment
  UCR88280  Valeriana capitata subsp. californica George K. Helmkamp 1995-9-23 3 38 Alpine Sierra Nevada Mtns., W side of Sonora Pass just beyond Mono County line 2927 Comment
  UCD139931  Veratrum californicum var. californicum G. K. Helmkamp; E. A. Helmkamp 2007-7-17 12541 Alpine Northern Sierra Nevada Mountains; Blue Lake Road, 11.5 miles south of its junction with CA-88, 0.5 mile due east of Lower Blue Lake. 2463 Comment
  UCR189906  Verbascum George K. Helmkamp, E. A. Helmkamp 2007-9-8 12905 El Dorado Foothills, northern Sierra Nevada Mountains, Lake Oaks Mobile Home Park, Diamond Springs; corner of Pleasant Valley Road and Patterson Drive 530 Comment
  SD239929  Verbascum thapsus George K. Helmkamp, William Barnes 2010-9-4 16923 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
  UCR170419  Verbascum thapsus George K. Helmkamp, Elizabeth Helmkamp 2005-11-15 10027 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
  SD241194  Verbascum virgatum George K. Helmkamp, E. A. Helmkamp 2010-4-17 15890 Placer Sierra Nevada Mountains Foothills: Rattlesnake Bar Road, 7.3 miles southwest of its junction with CA-49 near Pilot Hill (Pilot Hill 7.5'Q) 331 Comment
  UCR122994  Verbena lasiostachys var. lasiostachys George K. Helmkamp, E. A. Helmkamp 2001-5-30 6729 San Benito Gabilan Range, 11.0 mi south of San Juan Bautista on Hwy G-1; entrance to Fremont Peak State Park 800 Comment
  UCR158746  Verbena lasiostachys var. lasiostachys George K. Helmkamp, E. A. Helmkamp 2004-6-20 8660 Santa Barbara Outer south coast ranges, Santa Ynez Mountains. Along Miguelito Rd at about Mile-5. SW of Lompoc and near La Tipta Hill 335 Comment
  UCD125983  Verbena lasiostachys var. scabrida G. K. Helmkamp; E. A. Helmkamp 2000-9-2 5964 San Luis Obispo San Luis Obispo County: Iris Hills: See Canyon (south portion), ca. 1.8 miles north of San Luis Bay Drive (north of Avila Beach). 91 Comment
  SD239952  Verbena litoralis G. K. Helmkamp, E. A. Helmkamp 2009-9-5 15571 Butte Sacramento Valley: Lower Honcut Road, 0.8 mile east of its junction with CA-70, 2.5 mi. WSW (261a^z) of Honcut, 6.6 mi. SE (116a^z) of Gridley. 27 Comment
  UCD126114  Verbena litoralis G. K. Helmkamp; E. A. Helmkamp 2007-10-7 13068 Butte Northern Sacramento Valley: East Gridley Road at the west edge of the Feather River bridge. 27 Comment
  UCR230077  Verbena litoralis George K. Helmkamp, E. A. Helmkamp 2010-10-20 17047 Sutter Sacramento Valley, along Nicolaus Ave. 0.5 miles east of Trowbridge 15 Comment
  SEINET3285117 Image available Veronica persica George K. Helmkamp, E. A. Helmkamp 2007-3-14 11618 El Dorado Foothills, Sierra Nevada Mountains; Lake Oaks Mobile Home Park, Diamond Springs, Pleasant Valley Road and Patterson Drive. 537 Comment
  UCR106712  Veronica persica George K. Helmkamp, E. A. Helmkamp 1998-5-18 3787 Santa Clara Central Coast Range, E of San Jose; Kincaid Road 1.1 mi north of Mt. Hamilton Road. ( =Calif. Hwy 130) 793 Comment
  UCR232282  Veronica persica George K. Helmkamp, E. A. Helmkamp 2011-3-12 17063 San Joaquin Northern San Joaquin Valley, Collier Road, 0.2 mile east of its junction with Suttenfield Road, 9.4 mi. NE (50 deg. ) of Lodi 40 Comment
  UCR173743  Veronica serpyllifolia subsp. humifusa George K. Helmkamp, Elizabeth A. Helmkamp 2006-6-10 10691 El Dorado Northern Sierra Nevada Mountains, along Ice House Road, 10.6 miles south of Wentworth Springs Road (just south of the Jones Fork of Silver Creek) 1509 Comment
  CLARK-A1045-782  Vicia americana George K. Helmkamp 1977-6-5 San Bernardino San Bernardino Mountains dirt road [unpaved State Highway 173] between Lake Arrowhead and Mojave River Forks Regional Park; ; Lake Arrowhead 7.5'Q 1523 Comment
  UCD143805  Vicia americana subsp. americana G. K. Helmkamp; Elizabeth A. Helmkamp 2006-6-10 10661 El Dorado Northern Sierra Nevada Mountains, Ice House Road, 6.1 miles north of Hwy US-50. 1653 Comment
  UCR61747  Vicia sativa 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
  UCD108912  Vicia sativa subsp. nigra G. K. Helmkamp; E. A. Helmkamp 2007-4-26 11835 Calaveras Northern Sierra Nevada Mountains; along CA-49, 1 mile west of Mokelumne Hill, 1.7 miles south of the Amador County line. 370 Comment
  UCR158188  Vicia sativa subsp. nigra George K. Helmkamp 2004-6-12 8621 Santa Barbara Central Coast Range, Purissima Hills. Harris Grade Rd at '28.04 mi', about 3 mi south of CA Hwy 135 229 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
  UCR257707  Vicia sativa subsp. nigra George K. Helmkamp, Mary Alice Barnes 2013-4-30 20439 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
  SBBG128855  Vicia sativa subsp. sativa G. K. Helmkamp, E. A. Helmkamp 2011-5-12 17283 Sutter 0.1 mi SW of village of Nicolaus on 1st St, beside the Feather River, Sacramento Valley 9 Comment
  SEINET4691714  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2011-1 17283 Sutter Sacramento Valley: 0.1 mile southwest of village of Nicolaus on 1st street, beside the Feather River 9 Comment
  UCR123141  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2001-6-2 6765 San Mateo Central Coast, Pillar Point Harbor, about 4 miles north of Half Moon Bay 6 Comment
  UCR140117  Vicia sativa subsp. sativa George K. Helmkamp 2004-2-11 8287 San Luis Obispo Central Coast, Nipomo Mesa, Pomeroy Rd, 1.1 mi N of Willow Rd. 130 Comment
  UCR208268  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2009-5-7 14649 Placer Sierra Nevada Mountains Foothills, Mosquito Ridge Road, 8.9 miles east of its junction with Forest Hill Road in Foresthill 476 Comment
  UCR208269  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2009-5-4 14595 El Dorado Sierra Nevada Mountains Foothills, Sly Park Road, 0.3 miles southwest of its junction with Mormon Emigrant Trail 1067 Comment
  UCR233050  Vicia sativa subsp. sativa George K. Helmkamp, E. A. Helmkamp 2011-5-12 17283 Sutter Sacramento Valley, 0.1 mile southwest of village of Nicolaus on 1st Street, beside the Feather River 9 Comment
  UCR257546  Vicia sativa subsp. sativa George K. Helmkamp 2014-4-17 22764 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
  UCD109120  Vicia villosa subsp. varia G. K. Helmkamp; E. A. Helmkamp 2007-3-23 11696 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
  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
  SD227824  Vicia villosa subsp. villosa G. K. Helmkamp, E. A. Helmkamp 1999-5-20 4830 Santa Barbara Casmalia Hills: Corralitos Cyn SE of Guadalupe. 3.8 mi SE of CA-1 on Brown Rd. 305 Comment
  SEINET2441671  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2009-4-22 14560 Placer Sierra Nevada Mountains Foothills: Forest Hill Road 0.8 mile east of its junction with CA-49 and the North and Middle Forks of the American River (Auburn 7.5' Q.). 277 Comment
  UCR134388  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2001-4-29 6581 San Luis Obispo Irish Hills, Clark Valley Rd., 3.8 mi south of Los Osos Valley Rd., east of Los Osos 213 Comment
  UCR197384  Vicia villosa subsp. villosa George K. Helmkamp, E. A. Helmkamp 2008-4-17 13277 Sutter Sacramento Valley, along Pass Road at the south side of Sutter Buttes, 2.3 miles northwest of Sutter 70 Comment
  UCR242943  Vinca major George K. Helmkamp, E. A. Helmkamp 2011-5-24 17361 El Dorado Northern Sierra Nevada Mountains Foothills, Mesquite Road, 6.3 miles south of its junction with Wentworth Springs Road. 7.2 mi. NW (318 deg. ) of Pollock Pines 1098 Comment
  UCR111006  Viola bakeri George K. Helmkamp, E. A. Helmkamp 1999-6-30 5112 Placer Northern Sierra Nevadas, Soda Springs Road 0.9 mi south of Donner Pass Road, approaching Ice Lakes. 2104 Comment
  UCR192509  Viola bakeri George K. Helmkamp, E. A. Helmkamp 2007-5-31 12219 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
  CLARK-A1045-537  Viola douglasii George K. Helmkamp 1979-6-5 #2 San Bernardino San Bernardino Mountains at the junction of Forest Service road 3N08 and road 3N66Y; dry opening under pines; ; Big Bear City 7.5'Q 2285 Comment
  UCR205998  Viola lobata subsp. integrifolia George K. Helmkamp, E. A. Helmkamp 2009-6-10 14938 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
  UCR197300  Viola macloskeyi George K. Helmkamp, E. A. Helmkamp 2008-6-23 13723 Amador Northern Sierra Nevada Mountains, Dufrene Road, 1.1 miles south of its junction with CA-88 (jct. is between Mormon Emigrant Trail and Bear River Reservoir Road), c. 2 miles (air) north of the west end of Lower Bear River Reservoir 2055 Comment
  UCR196826  Viola purpurea subsp. purpurea George K. Helmkamp, E. A. Helmkamp 2008-5-15 13447 El Dorado Northern Sierra Nevada Mountains, Granite Springs road, 0.4 mile east of its junction with Ice House Road 1707 Comment
  UCR236917  Viola purpurea subsp. purpurea George K. Helmkamp, E. A. Helmkamp 2012-5-28 19075 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
  UCR115585  Viola purpurea subsp. quercetorum George K. Helmkamp, E. A. Helmkamp 2000-4-20 5409 San Luis Obispo Central Coast, road crest between See Canyon Road and Prefumo Canyon Road, SW of San Luis Obispo 320 Comment
  UCR237068  Viola sheltonii George K. Helmkamp, E. A. Helmkamp 2012-5-18 19019 El Dorado Northern Sierra Nevada Mountains Foothills, Capps Crossing Road (Bonnetti Rd.), 0.1 mile northwest of the bridge over Diamond Creek, E of Jenkinson Lake and S of US Hwy 50 1186 Comment
  UCD94770  Vulpia myuros G. K. Helmkamp; Elizabeth Helmkamp 2006-5-24 10552 El Dorado Northern Sierra Nevada Mountains. Junction of Ice House Canyon Road and West Meadows Road (SSW of Union Valley Reservior, just N of Hwy 50). 1067 Comment
  SD247296  Vulpia myuros var. hirsuta George K. Helmkamp, Elizabeth Helmkamp 2012-4-7 18719 San Joaquin San Joaquin Valley: along CA-26, 3.2 miles southwest of its junction with N Wimer Road, NE of town of Linden (Valley Springs SW 7.5'Q) 52 Comment
  SEINET3412004 Image available Vulpia myuros var. myuros George K. Helmkamp, E. A. Helmkamp 2012-1 18554 Sacramento Sacramento Valley: Rancho Omochumnes, Indio Drive, 0.2 mile ... 64 Comment
  UCR196763  Woodsia oregana George K. Helmkamp 2008-6-17 13690 Amador Northern Sierra Nevada Mountains, Bear River Reservoir Road on the branch leading to Cole Creek, 2.7 miles east of Bear River Reservoir dam 1814 Comment
  SD197701  Xanthium spinosum G. 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. 4 Comment
  UCR201776  Xanthium spinosum George K. Helmkamp, E. A. Helmkamp 2008-10-6 14207 Yuba Sacramento Valley, junction of CA-65 and Ostrom No. 3 Road, southeast of Olivehurst 24 Comment
  HSC79043  Xanthium strumarium G. K. Helmkamp 1983-10-8 - 10 San Bernardino Big Morongo Preserve of The Nature Conservancy, Morongo Valley, near the house in the San Bernardino Co. owned area. 762 Comment
  UCR37672  Ziziphus parryi George K. Helmkamp 1984-4-20 840420- 4 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



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