Search Results — 2000 specimen records retrieved (1433 records with coordinates)
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Results for search: Collector=Robbins;   

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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  GH355186  Abies concolor G. T. Robbins 1944-10-15 1833 Unknown At C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  UC747686  Abies concolor G. Thomas Robbins 1944-10-15 1833 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline) 1036 Comment
  UCD134147  Abies concolor W. W. Robbins 1928-4-29 948 Unknown American River. Comment
  JEPS7450  Abies grandis G. Thomas Robbins 1952-4-4 3410 Mendocino just s Caspar; Caspar Ridge Comment
  JEPS16378  Abronia umbellata G. Thomas Robbins 1956-12-30 3799 Monterey near Marina Monterey Bay; Marina Beach Comment
  UC1084469  Acaena pinnatifida var. californica G. Thomas Robbins 1937-6-6 234 Sonoma hills 2 - 3 mi. e. Bodega Bay Comment
  CAS-BOT-BC330655  Acer glabrum var. glabrum G. Thomas Robbins 1945-7-1 2032 El Dorado Slopes above Island Lake, ca 4 mi NE of Wrights Lake, 9 me N of US Hwy 50 2590 Comment
  UC747304  Acer glabrum var. glabrum G. Thomas Robbins 1944-7-28 1784 El Dorado ca 1/4 mi w Rockbound Pass (rocky exposed slope along Willow Flat Trail, Desolation Valley Wilderness Area); Desolation Valley Wilderness Area, w of Rockbound Pass 2438 Comment
  UC747305  Acer glabrum var. glabrum G. Thomas Robbins 1945-7-1 2032 El Dorado 9 mi n of U.S. Highway 50 ca 4 mi ne Wrights Lake (above Island Lake); , ne of Wrights Lake 2590 Comment
  A363510  Acer glabrum var. torreyi G. T. Robbins 1944-7-28 1784 Unknown Rocky exposed slope along Willow Flat Trail, ca. 1/4 mi. w. of Rockbound Pass, Desolation Valley Wilderness Area (T. 12 N., R16 E., Sec. 10) 2438 Comment
  UC1084373  Acer negundo G. Thomas Robbins 1937-3-27 44 Sonoma Santa Rosa bed of Santa Rosa Creek, Santa Rosa Comment
  JEPS25167  Acer negundo var. californicum G. Thomas Robbins 1959-6-2 4039 Alameda paralleling Richmond Blvd. and near corner Napier St. (along Glen Echo Creek); Oakland, along Glen Echo Creek Comment
  JEPS25005  Achillea millefolium G. Thomas Robbins 1958-8-31 3930 Marin along e edge of the NWP railroad tracks, 1/2 mi e of US 101 Burdell Siding Comment
  UC747165  Achillea millefolium G. Thomas Robbins 1943-6-16 1179 El Dorado 3 mi e Placerville; Institute of Forest Genetics Arboretum Comment
  SEINET5585531 Image available Achnatherum lemmonii G. Thomas Robbins 1943-1 1149 El Dorado Above North Fork Webber Creek, about 3 mi. e. of Camino 975 Comment
  UC1084392  Achyrachaena mollis G. Thomas Robbins 1937-4-25 145 Contra Costa 2 mi e Alamo Comment
  CAS-BOT-BC30417  Achyrachaena mollis G. Thomas Robbins 1945-5-27 1956 El Dorado About 1 mile north of Pleasant Valley 762 Comment
  SEINET2429226  Achyrachaena mollis G. Thomas Robbins 1945-5-27 1965 El Dorado Grassy meadow with scattered oaks. About one mile north of Pleasant Valley. 760 Comment
  UCD97897  Achyronychia cooperi W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  CAS-BOT-BC204854  Acmispon argophyllus var. fremontii G. Thomas Robbins 1944-5-28 1641 El Dorado Above Long Creek, 1-2 mi. from its confluence with South Fork American River 762 Comment
  UCD104326  Acmispon parviflorus W. W. Robbins 1928-4-29 966 Unknown County Unknown: American River. Comment
  UCD104281  Acmispon rigidus W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD104524  Acmispon wrangelianus Robbins; Raynor 1943-6-1 s.n. Modoc Corporation Ranch, Likely. Comment
  UC747410  Actaea rubra G. Thomas Robbins 1943-4-25 1032 El Dorado ca. 3 mi. e. Camino; N. Fork Webber Creek 914 Comment
  UC747164  Adenocaulon bicolor G. Thomas Robbins 1943-7-10 1263 El Dorado 3 mi e, along bank of North Fork Webber Creek Camino; Webber Creek 914 Comment
  CAS-BOT-BC29276  Adenocaulon bicolor G. Thomas Robbins 1943-7-10 1263 El Dorado North Fork of Webber Creek, about 3 miles E of Camino 914 Comment
  RSA32383  Adenocaulon bicolor G. Thomas Robbins 1945-7-16 2068 El Dorado Along North Fork Webber Creek, 3 mi. E of Camino 915 Comment
  SEINET195485  Adenocaulon bicolor G. Thomas Robbins 1945-7-16 2068 El Dorado North Fork Webber Creek, about 3 miles E of Camino 910 Comment
  SBBG70868  Adenostoma sparsifolium R. C. and J. R. Robbins 1923-2-15 Riverside Pinyon Flat, Palms-Pines Rd Comment
  UC964819  Adiantum aleuticum G. Thomas Robbins 1945-6-17 1998 El Dorado bank above Camp Creek near Baltic Peak 975 Comment
  UCSB8229  Adiantum aleuticum Robbins, G. 1936-8-1 Humboldt Cliff above Van Duzen River, near Carlotta Comment
  UC747312  Aesculus californica G. Thomas Robbins 1943-6-17 1182 El Dorado 3 mi e Placerville; Institute Of Forest Genetics 822 Comment
  UC747556  Agastache urticifolia G. Thomas Robbins 1945-8-6 2109 El Dorado in Long Meadow near Schlien Ranger Station; Long Meadow 1676 Comment
  UC747565  Agastache urticifolia G. Thomas Robbins 1944-7-30 1818 El Dorado 9 mi n of U.S. Highway 50 about 4 mi ne Wrights Lake (along Willow Flat Trail near Maud Lake); near Maud Lake, ne of Wrights Lake 2438 Comment
  GH400338  Agastache urticifolia G. T. Robbins 1944-7-30 1818 Unknown near Maud Lake, along Willow Flat Trail, about four miles northeast of Wrights Lake (nine miles north of U. S. Highway 50) 2438 Comment
  GH400340  Agastache urticifolia G. T. Robbins 1945-8-6 2109 Unknown Long Meadow near Schlien Ranger Station (T. 13N, R. 14E., Sec. 13-14) 1676 Comment
  JEPS25249  Ageratina adenophora G. Thomas Robbins with John Weiler 1959-8-6 4129 Monterey 4 mi s Pfeiffer (between Castro Canyon and Grimes Canyon, slopes along State Highway 1); Big Sur State Park 182 Comment
  CAS-BOT-BC29407  Ageratina occidentalis G. Thomas Robbins 1943-9-5 1379 El Dorado Summit of Mount Tallac 2956 Comment
  CAS-BOT-BC295541  Agnorhiza bolanderi G. Thomas Robbins 1945-4-22 1844 El Dorado 2-3 mi. northwest of Shingle Springs 457 Comment
  CAS-BOT-BC295697  Agnorhiza reticulata G. Thomas Robbins 1946-9-7 3746 El Dorado Along U. S. Highway 50, about 2 miles west of Shingle Springs 411 Comment
  CAS-BOT-BC295701  Agnorhiza reticulata G. Thomas Robbins 1945-6-30 2013 El Dorado Extending along Green Valley Road for 1/4 mi. immediately w. of Rescue 396 Comment
  UC747201  Agnorhiza reticulata G. Thomas Robbins 1945-5-20 1946 El Dorado 100 yds and 1 mi n Rescue (along Deer Valley Road) 396 Comment
  UC747208  Agnorhiza reticulata G. Thomas Robbins 1945-6-30 2013 El Dorado Extending along Green Valley Road for 0.25 mi immediately W of Rescue. 396 Comment
  SEINET6709707 Image available Agnorhiza reticulata G. T. Robbins 1945-6-30 2013 El Dorado Rescue Comment
  UCD128591  Agoseris grandiflora G. Thomas Robbins; S. Galen Smith 1958-6-2 3851 Contra Costa Along Franklin Canyon Road (State Highway 4) in Refugio Valley, just east of Hercules city boundary. 18 Comment
  JEPS22025  Agoseris grandiflora var. grandiflora G. Thomas Robbins with S. Galen Smith 1958-6-2 3851 Contra Costa just e of Hercules City boundary along Franklin Canyon Rd Hercules City; Refugio Valley 18 Comment
  UC907758  Agoseris grandiflora var. grandiflora G. Thomas Robbins 1944-6-14 1685 El Dorado 3 mi e Placerville; Institute of Forest Genetics Arboretum 822 Comment
  UC907761  Agoseris heterophylla var. cryptopleura G. Thomas Robbins 1944-5-15 1600 El Dorado 3 mi e, (near Institute of Forest Genetics) Placerville 762 Comment
  JEPS7979  Agoseris monticola G. Thomas Robbins and Peter H. Raven 1954-7-22 3626 Tulare along John Muir Trail to Mt. Guyot at Guyot Flat Crabtree Meadows; Sequoia National Park 3200 Comment
  JEPS7959  Agoseris retrorsa G. Thomas Robbins 1953-5-8 3526 Calaveras 4.7 mi w, along Mokelumne Hill-Glencoe road Glencoe; Rich Gulch, Mokelumne Hill 457 Comment
  UCD128663  Agoseris retrorsa G. Thomas Robbins 1953-5-8 3526 Calaveras slopes of Rich Gulch, Mokelumne Hill, Glencoe Road, 4.7 miles west of Glencoe. 457 Comment
  SEINET221009  Agrostis capillaris G. Thomas Robbins 1944-7-6 1754 El Dorado Sly Park meadow 5 mi s. of Pollock Pines. 1006 Comment
  UC907641  Agrostis capillaris G. Thomas Robbins 1944-7-6 1754 El Dorado 5 mi s Pollock Pines; Sly Park meadow Comment
  SD165118  Ailanthus altissima Jolynn Robbins 2004-7-5 24 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UCD97388  Allenrolfea occidentalis W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD98022  Allionia incarnata var. incarnata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747511  Allium amplectens G. Thomas Robbins 1943-5-7 1075 El Dorado 3 mi e Placerville; Institute of Forest Genetics 792 Comment
  UC747527  Allium amplectens G. Thomas Robbins 1945-5-5 1869 Marin 2-3 mi w Hamilton Field Air Base (stream on n side of Big Rock Ridge); Big Rock Ridge 152 Comment
  CAS-BOT-BC447492  Allium amplectens G. Thomas Robbins 1943-5-7 1075 El Dorado Institute of Forest Genetics, 3 miles east of Placerville 792 Comment
  POM196054  Allium amplectens L. F. Robbins 1927-5-6 s.n. El Dorado Near Camino. Comment
  JEPS20280  Allium campanulatum G. Thomas Robbins 1944-6-7 1661 El Dorado 3 mi e Camino (woods above North Fork Webber Creek); North Fork Webber Creek 914 Comment
  UC907673  Allium campanulatum G. Thomas Robbins 1944-7-30 1815 El Dorado ridge above Lake Lois; Desolation Valley Wilderness Area 2590 Comment
  UC972360  Allium campanulatum G. Thomas Robbins 1945-6-23 2011 El Dorado ca. 3 mi e Camino (on wooded slope above North Fork Webber Creek); North Fork Webber Creek 975 Comment
  CAS-BOT-BC463022  Allium campanulatum G. Thomas Robbins 1943-6-5 1119 El Dorado Above Silver Fork American River near Sacramento Box Co. sawmill (China Flat), 3-4 mi. s. of Kyburz 1371 Comment
  SEINET8736688 Image available Allium campanulatum G. Thomas Robbins 1945-1 2011 El Dorado above North Fork Webber Creek, ca. 3 mi. e. of Camino 975 Comment
  UCD138497  Allium campanulatum W. W. Robbins 1925-6-20 1816 Sacramento American River. Comment
  RSA123593  Allium falcifolium G. Thomas Robbins 1936-5-1 s.n. Lake East and opposite Mirabel Mine. Comment
  POM196066  Allium obtusum var. obtusum L. F. Robbins 1928-4-29 s.n. El Dorado 41 miles beyond Placerville. Comment
  UCD138574  Allium obtusum var. obtusum W. W. Robbins 1928-4-29 963 Unknown County Unknown: American River. Comment
  UC1084425  Allium peninsulare var. franciscanum G. Thomas Robbins 1938-7-4 271 Sonoma ocean cliffs ca. 3 mi. n. Bodega Bay Comment
  JEPS8048  Allium peninsulare var. peninsulare G. Thomas Robbins 1953-5-7 3514 Calaveras on road to Columbia 2 mi s, on lower slopes of table Mountain Vallecito; Table Mountain 487 Comment
  UC972352  Allium unifolium G. Thomas Robbins 1951-4-24 3387 Sonoma about 3 mi se Santa Rosa; Bennett Valley Comment
  SEINET197632  Allium unifolium G. Thomas Robbins 1951-4-24 3387 Sonoma Bennett Valley, about 3 miles southeast of Santa Rosa. Comment
  UC1560914  Allium validum G. T. Robbins 1945-8-5 G.N. 302 El Dorado Onion Flat Desolation Valley Wilderness Area, Rockbound Valley 2042 Comment
  RSA32310  Allium validum G. Thomas Robbins 1944-7-29 1812 El Dorado At Camper Flat along Rubicon River, Rockbound Valley, Desolation Valley Wilderness area. 2134 Comment
  UC747614  Allophyllum divaricatum G. Thomas Robbins 1943-5-25 1091 El Dorado 3 mi. e. Placerville (Eddy Arboretum, Institute of Forest Genetics); Eddy Arboretum, Institute of Forest Genetics 822 Comment
  RSA114019  Allophyllum integrifolium G. Thomas Robbins 1944-7-28 1764 El Dorado one-half mile south of Wrights Lake 2134 Comment
  UC972348  Alopecurus aequalis G. Thomas Robbins 1951-8-4 3406 Fresno 1 -3 mi. w. Piute Pass (just s. of Humphreys Basin) 3352 Comment
  SEINET7295653 Image available Alopecurus aequalis G. Thomas Robbins 1951-1 3406 Fresno Half-submerged in small pools open meadow country, 1-2 miles west of Piute Pass, just south of Humphreys Basin 3353 Comment
  OBI17106  Ambrosia chamissonis G. Thomas Robbins, John Weiler 1959-5-23 4021 Contra Costa On breakwater (partly natural, partly manmade) portion of Brooks Island 9its NW extension), San Francisco Bay, Richmond Comment
  SBBG61675  Ambrosia dumosa R. C. and J. R. Robbins 1933-2-16 Imperial Travertine Pt, 24 mi S of Indio Comment
  SBBG61678  Ambrosia dumosa J. R. and R. C. Robbins 1930-3-29 Los Angeles Antelope Valley Comment
  UCD128802  Ambrosia dumosa W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC746949  Amelanchier alnifolia var. pumila G. Thomas Robbins 1943-7-25 1288 a El Dorado slopes above Medley Lakes (reservoir); Desolation Valley Wilderness Area 2590 Comment
  CAS-BOT-BC142989  Amelanchier utahensis G. Thomas Robbins 1944-4-23 1549 El Dorado Along shore of Slab Creek near its juncture with South Fork American River, about 5 mi. n. of Camino. 609 Comment
  UC746997  Amelanchier utahensis G. Thomas Robbins 1943-4-24 1025 El Dorado 3 mi e Camino 1036 Comment
  UC747484  Amelanchier utahensis G. Thomas Robbins 1944-4-23 1549 El Dorado about 5 mi n Camino (along shore of Slab Creek, near its junction with South Fork American River); Slab Creek 609 Comment
  UCD81538  Ammannia robusta W. W. Robbins; W. D. Norton 1927-10-1 823 Yolo West of Davis. Comment
  UC1084432  Amsinckia eastwoodiae G. Thomas Robbins 1940-3-16 285 San Joaquin near Castle Rock (n facing slope Corral Hollow); Corral Hollow 198 Comment
  JEPS8065  Amsinckia eastwoodiae G. Thomas Robbins and Lawrence L. Heckard 1953-5-30 3549 Tulare Above South Fork of Kaweah River, about 10.5 miles southeast of Three Rivers. Comment
  UC747564  Amsinckia intermedia G. Thomas Robbins 1944-4-14 1531 Marin 3 mi w of Hamilton Field Air Base (near summit of Big Rock Ridge); Big Rock Ridge 304 Comment
  UC747586  Amsinckia menziesii var. menziesii G. Thomas Robbins 1944-5-7 1593 El Dorado about 5 mi s Pollock Pines (along Pleasant Valley Road w of Sly Park Meadow) 1005 Comment
  POM313193  Andropogon glomeratus G. Thomas Robbins, S. Galen Smith 1949-11-19 1903 Marin Roadside seep. Liberty Gulch, Mt. Tamalpias. Comment
  UC1100220  Andropogon glomeratus var. pumilus G. T. Robbins and S. Galen Smith 1949-11-19 1903 Marin Liberty Gulch Mt. Tamalpais; , Liberty Gulch Comment
  JEPS7982  Androsace septentrionalis subsp. subumbellata G. Thomas Robbins, Peter H. Raven 1954-7-19 3622 Inyo above small lake on first bench above Consultation Lake (Lone Pine Canyon); Long Pine Canyon, above Consultation Lake 3657 Comment
  JEPS7453  Androstephium breviflorum G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3430 San Bernardino along US Hwy 91 about 1 mi w Cronese (Cronese Valley); Mohave Desert 396 Comment
  UC747416  Anemone occidentalis G. Thomas Robbins 1945-8-3 2074 El Dorado e. face just below summit Tells Peak; Desolation Valley Wilderness Area, Tells Peak 2743 Comment
  UC1057473  Anemone oregana G. Thomas Robbins 1940-3-21 298 Sonoma ca 6 mi e Windsor (foothills, canyon e of Chalk Hill rd) Comment
  JEPS15559  Antennaria geyeri G. Thomas Robbins with L. Constance, R. Bacigalupi, et al. 1956-7-25 3722 Lake Lake-Colusa County boundary; Snow Mt. West 2145 Comment
  CAS-BOT-BC69129  Antennaria geyeri G. Thomas Robbins; L. R. Heckard 1956-7-25 3722 Colusa At summit of Snow Mt. West 2145 Comment
  UC747209  Antennaria media G. Thomas Robbins 1944-7-28 1793 El Dorado above, near Rockbound pass Lake Doris; Desolation Valley Wilderness 2590 Comment
  CAS-BOT-BC69108  Antennaria media G. Thomas Robbins 1944-7-28 1793 El Dorado Above Lake Doris near Rockbound Pass, Desolation Valley Wilderness Area 2590 Comment
  UC907637  Anthoxanthum aristatum G. Thomas Robbins with J. T. Howell 1945-5-9 1894 Marin 1/2 mi n of Hamilton Field Air Base Comment
  UCD85335  Anthoxanthum occidentale G. Thomas Robbins 1952-4-4 3409 Mendocino About one mile southwest of Mendocino County Airport. Comment
  UC907649  Anthoxanthum odoratum G. Thomas Robbins 1944-7-6 1755 El Dorado 5 mi s of Pollock Pines (Sly Park); Sly Park 1005 Comment
  UC964836  Anulocaulis annulatus G. Thomas Robbins 1950-4-6 3316 Inyo Death Valley Nat'l Monument, Panamint Mts., Mosaic Canyon Comment
  UC747576  Apocynum androsaemifolium G. Thomas Robbins 1943-7-25 1324 El Dorado slope above e. shore of Echo Lake 2286 Comment
  UCD81565  Apocynum cannabinum W. W. Robbins; W. D. Norton 1928-8-1 1417 Yolo near Clarksburg. Comment
  UC747577  Apocynum cannabinum G. Thomas Robbins 1944-6-16 1694 El Dorado roadway at edge of pine platation, Institute of Forest Genetics Institute of Forest Genetics 792 Comment
  SBBG71711  Aquilegia formosa J. R. and R. C. Robbins 1932-7-16 Mariposa Tioga Pass Rd Comment
  CAS-BOT-BC171623  Aralia californica G. Thomas Robbins 1945-7-16 2066 El Dorado Woods along North Fork Webber Creek, 3 mi. e. of Camino 914 Comment
  SBBG59968  Arbutus menziesii R. C. and J. R. Robbins 1921-1 Santa Barbara N slope Santa Ynez Mtns Comment
  UC1084439  Arbutus menziesii G. Thomas Robbins 1940-3-21 299 Sonoma 5-6 mi e of Windsor (along Chalk Hill Road); Chalk Hill Road 91 Comment
  UC747595  Arbutus menziesii G. Thomas Robbins 1943-4-24 1026 El Dorado 3 mi ne of Camino 975 Comment
  UC747678  Arbutus menziesii G. Thomas Robbins 1944-4-14 1540 Marin immidiately w of Hamnilton Field Air Base 30 Comment
  UC746870  Arceuthobium campylopodum G. Thomas Robbins 1943-10-28 1403 El Dorado 2-3 mi e Placerville (along Hwy 50) 762 Comment
  GH362498  Arctostaphylos G. T. Robbins 1944-2-6 1483 Unknown Near head of Spanish Ravine at eastern outskirts of Placerville Comment
  UC1084441  Arctostaphylos G. Thomas Robbins 1940-3-22 301 Sonoma Guerneville Rd ca 8.5 mi w Santa Rosa (in small gully along road); Vine Hill region 45 Comment
  UC747682  Arctostaphylos G. Thomas Robbins 1944-2-6 1483 El Dorado near head of Spanish Ravine (e outskirts of Placerville); Placerville Comment
  UC907783  Arctostaphylos G. Thomas Robbins 1944-9-24 1830 El Dorado ridge above North Fork Webber Creek (about 3 mi e) 1066 Comment
  CAS-BOT-BC24263  Arctostaphylos mewukka G. Thomas Robbins 1944-3-31 1492 El Dorado Above North Fork Webber Creek, ca 3 mi. e. of Camino. 975 Comment
  CAS-BOT-BC24264  Arctostaphylos mewukka G. Thomas Robbins 1956-4-29 9117 El Dorado Near bridge on North Fork of Consumes River at road nw. of Youngs (Somerset). Comment
  POM196057  Arctostaphylos mewukka L. F. Robbins 1937-5-6 s.n. El Dorado Sly Park Comment
  GH350773  Arctostaphylos nevadensis G. T. Robbins 1945-7-1 2028 Unknown above shore of Grouse Lake, 2-2 1/2 miles east of Wrights Lake, 9 miles north of U. S. Highway 50 2590 Comment
  RSA46949  Arctostaphylos nevadensis G. Thomas Robbins 1945-8-5 2084 El Dorado Along north shore of Rockbound lake, Rockbound Valley, Desolation Valley Wilderness Area. 2012 Comment
  UC747661  Arctostaphylos nevadensis G. Thomas Robbins 1945-8-5 2084 El Dorado n shore of lake Desolation Valley Wilderness Area, Rockbound Valley, Rockbou 2011 Comment
  UC747685  Arctostaphylos nevadensis G. Thomas Robbins 1943-6-27 1216 El Dorado ridge above Echo Summit Pass 2438 Comment
  A350795  Arctostaphylos nissenana G. T. Robbins 1944-2-6 1482 Unknown Near head of Spanish Ravine at eastern outskirts of Placerville Comment
  CAS-BOT-BC39913  Arctostaphylos nissenana G. Thomas Robbins 1944-2-6 1483 El Dorado Near head of Spanish Ravine at eastern outskirts of Placerville. Comment
  CAS-BOT-BC39937  Arctostaphylos nissenana G. Thomas Robbins 1944-2-6 1482 El Dorado Near head of Spanish Ravine at eastern outskirts of Placerville. Comment
  CAS-BOT-BC39939  Arctostaphylos nissenana G. Thomas Robbins 1944-3-19 1489 El Dorado On ridge southwest of Brush Creek at its confluence with South Fork American River. 914 Comment
  CAS-BOT-BC39943  Arctostaphylos nissenana G. Thomas Robbins 1945-2-19 1838 El Dorado Fruit Ridge, 3 mi. e. of Placerville. 762 Comment
  GH350792  Arctostaphylos nissenana G. T. Robbins 1944-2-6 1483 Unknown near head of Spanish Ravine at eastern outskirts of Placerville Comment
  GH350796  Arctostaphylos nissenana G. T. Robbins 1944-2-6 1482 Unknown Near head of Spanish Ravine at eastern outskirts of Placerville Comment
  GH350797  Arctostaphylos nissenana G. T. Robbins 1944-3-19 1489 Unknown On ridge southwest of Brush Creek at its confluence with South Fork American River 914 Comment
  JEPS15038  Arctostaphylos nissenana G. Thomas Robbins 1943-3-28 971 El Dorado slopes near head of Spanish Ravine; Placerville 609 Comment
  UC747668  Arctostaphylos nissenana G. Thomas Robbins 1944-2-6 1482 El Dorado near head of Spanish Ravine (e outskirts of Placerville); Placerville 609 Comment
  UC747683  Arctostaphylos nissenana G. Thomas Robbins 1943-3-28 971 El Dorado on slope near head of Spanish Ravine (e outskirts of Placerville); Placerville 609 Comment
  UC747684  Arctostaphylos nissenana G. Thomas Robbins 1944-3-19 1489 El Dorado ridge sw Brush Creek at its confluence with South Fork American River 914 Comment
  RSA32124  Arctostaphylos nissenana G. Thomas Robbins 1943-3-28 971 El Dorado on slope near head of Spanish Ravine, at eastern outskirts of Placerville 609 Comment
  CAS-BOT-BC46697  Arctostaphylos patula G. Thomas Robbins 1943-6-7 1137 El Dorado Above Silver Fork American River near Sacramento Box Sawmill (China Flat), ca. 4 mi. s. of Kyburz. 1371 Comment
  SBBG60047  Arctostaphylos patula J. R. and R. C. Robbins 1932-6-7 Tulare Sequoia Nat Park 1950 Comment
  CAS-BOT-BC47408  Arctostaphylos viscida subsp. viscida G. Thomas Robbins 1944-9-24 1830 El Dorado above North Fork Webber Creek, about 3 miles east of Camino 1066 Comment
  UC747552  Arctostaphylos viscida subsp. viscida G. Thomas Robbins 1943-3-26 968 El Dorado 3 mi e Camino (canyon slope above creek); North Fork Webber Creek 1036 Comment
  UC746836  Arenaria kingii var. glabrescens G. Thomas Robbins 1944-7-28 1776 El Dorado 3 mi ne Wrights Lake; Willow Flat Trail 2286 Comment
  CAS-BOT-BC102183  Argyranthemum foeniculaceum G. Thomas Robbins; John Weiler 1959-5-23 4022 Contra Costa Breakwater portion of Brooks Island (its northwestern extension), San Francisco Bay, Richmond Comment
  OBI16786  Argyranthemum foeniculaceum G. Thomas Robbins, John Weiler 1959-5-23 4022 Contra Costa Brooks Island (its NW extension), San Francisco Bay, Richmond Comment
  UCD129096  Argyranthemum foeniculaceum G. Thomas Robbins; John Weiler 1959-5-23 4022 Contra Costa portion of Brooks Island (its northwestern extension), San Francisco Bay. Comment
  UCD56430  Aristida adscensionis W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC1084356  Aristolochia californica G. Thomas Robbins 1937-3-25 15 Sonoma Santa Rosa Creek just e. of Santa Rosa on hwy. to Sonoma Comment
  SBBG58495  Armeria maritima subsp. californica R. C. Robbins 1931-4-16 San Luis Obispo between Cambria and San Simeon Comment
  JEPS7971  Arnica chamissonis G. Thomas Robbins and Peter H. Raven 1954-7-26 3635 Tulare about 2 mi n, edge of small lake, along John Muir Trail Crabtree Meadows; Sequoia National Park, John Muir Trail 3352 Comment
  CAS-BOT-BC82703  Arnica longifolia G. Thomas Robbins 1943-9-5 1374 El Dorado Summit of Mt. Tallac 2956 Comment
  JEPS15569  Arnica longifolia G. Thomas Robbins with L. R. Heckard 1956-7-25 3712 Colusa Snow Mt. East (s flank) Dark Hollow Creek, Snow Mt. East 1981 Comment
  UC747188  Arnica longifolia G. Thomas Robbins 1943-9-5 1374 El Dorado Summit of Mt. Tallac Mt. Tallac 2956 Comment
  SEINET3096722 Image available Arnica longifolia subsp. myriadenia G. Thomas Robbins 1943-9-5 1374 El Dorado Summit of Mt. Tallac 2960 Comment
  CAS-BOT-BC82781  Arnica mollis G. Thomas Robbins 1956-9-10 3763 Amador slope above State Highway 88, close to turn-off for and about one-half mile south of Kirkwood Lake 2346 Comment
  CAS-BOT-BC82782  Arnica mollis G. Thomas Robbins 1956-9-10 3763 Amador slope above State Highway 88, close to turn-off for and about one-half mile south of Kirkwood [Lakke] Lake 2346 Comment
  CAS-BOT-BC82793  Arnica mollis G. Thomas Robbins 1944-7-29 1799 El Dorado on ridge south and above Lake Schmidell, Desolation Valley Wilderness Area 2590 Comment
  JEPS15694  Arnica mollis G. Thomas Robbins 1956-9-10 3763 Amador 1/2 mi s Kirkwood Lake 2346 Comment
  JEPS15693  Arnica nevadensis G. Thomas Robbins 1956-9-10 3764 Amador 1/2 mi s Kirkwood Lake 2346 Comment
  UC747172  Arnica nevadensis G. Thomas Robbins 1944-7-29 1806 El Dorado Red Peak, above Lake Schmidell Desolation Valley Wilderness Area, Red Peak 2651 Comment
  CAS-BOT-BC85106  Arnica nevadensis G. Thomas Robbins 1956-9-10 3764 Amador Steep, somewhat rocky slope above State Highway 88, close to turn-off for and about one-half mile south of Kirkwood Lake 2346 Comment
  CAS-BOT-BC85108  Arnica nevadensis G. Thomas Robbins 1956-9-10 3764 Amador Steep, somewhat rocky slope above State Highway 88, close to turn-off for and about one-half mile south of Kirkwood Lake 2346 Comment
  SD165315  Artemisia californica Jolynn Robbins 2004-7-5 17 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC747153  Artemisia cana subsp. bolanderi G. Thomas Robbins 1945-10-18 2157 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  CAS-BOT-BC84832  Artemisia cana subsp. cana G. Thomas Robbins 1945-10-18 2157 Lassen Harvey Valley, Lassen National Forest 1676 Comment
  UC747197  Artemisia douglasiana G. Thomas Robbins 1943-7-10 1260 El Dorado 3 mi e Placerville; Eddy Arboretum, Institute of Forest Genetics 822 Comment
  SD185452  Artemisia dracunculus Jolynn Robbins 2004-8-23 31 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  JEPS15688  Artemisia norvegica subsp. saxatilis G. Thomas Robbins 1956-9-10 3769 Alpine 2 airline miles s of Carson Pass (along trail to Round top and Elephants Back, between Woods Lake and Winnemucca Lake) 2621 Comment
  SEINET195656  Artemisia tridentata subsp. tridentata G. Thomas Robbins 1945-10-18 2157 Lassen Lassen National Forest; Harvey Valley 1676 Comment
  GH427520  Artemisia tridentata subsp. vaseyana G. T. Robbins 1945-10-7 2155 Unknown Southeast slope of Harvey Mt., 2-3 miles northeast of Burgess Spring, Harvey Valley, Lassen N. F. [National Forest] (T.33N., R.9E) 1676 Comment
  SEINET195654  Artemisia tridentata subsp. vaseyana G. Thomas Robbins 1945-10-7 2155 Lassen Lassen National Forest; Harvey Mountain, 2-3 miles northeast of burgess Spring, Harvey Valley 1676 Comment
  UC747132  Artemisia tridentata subsp. vaseyana G. Thomas Robbins 1943-9-5 1396 El Dorado along Tahoe-Yosemite Trail 1-2 mi nw Glen Alpine Springs 2286 Comment
  UC747155  Artemisia tridentata subsp. vaseyana G. Thomas Robbins 1945-10-7 2155 Lassen 2-3 mi ne Burgess Spring (se slope of Harvey Mt.); Lassen National Forest, Harvey Valley 1676 Comment
  UCD137861  Asarum hartwegii W. W. Robbins 1928-4-29 986 Sacramento American River. Comment
  SBBG58673  Asclepias eriocarpa J. R. and R. C. Robbins 1932-6-7 Tulare Sequoia Nat Park Rd [Marble Fk?] 457 Comment
  UCD121347  Asclepias fascicularis W. W. Robbins 1931-8-2 2228 Yolo Near Davis. Comment
  SEINET195648  Asclepias speciosa G. Thomas Robbins 1943-7-18 1278 El Dorado Near Phippen Mill, 5 miles south of Pollock Pines. 1006 Comment
  UCD121380  Asclepias speciosa W. W. Robbins 1941-8-8 s.n. Mendocino Round Valley. Comment
  CAS-BOT-BC65937  Aspidotis densa G. Thomas Robbins 1945-6-17 1994 El Dorado above Camp Creek near Baltic Peak 1005 Comment
  UC964818  Aspidotis densa G. Thomas Robbins 1945-6-14 1994 El Dorado near Baltic Peak (above Camp Creek) 1005 Comment
  UC964854  Aspidotis densa G. Thomas Robbins 1943-6-27 1218 El Dorado above Echo Summit Pass (ca. 3/4 mi sw of US Hwy 50) 2438 Comment
  UC964848  Aspidotis densa G. Thomas Robbins 1943-6-13 1165 El Dorado just w of its junction with Plum Creek and Hazel Valley roads Park Creek Rd 1219 Comment
  SBBG68401  Astragalus bolanderi J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC746972  Astragalus bolanderi G. Thomas Robbins 1943-8-15 1358 El Dorado along shore Wrights Lake; along shore Wrights Lake 2286 Comment
  CAS-BOT-BC178479  Astragalus gambelianus G. Thomas Robbins 1944-5-16 1607 El Dorado Grassy sites at Institute of Forest Genetics, 3 mi. e. of Placerville. 822 Comment
  UC746981  Astragalus gambelianus G. Thomas Robbins 1944-5-16 1607 El Dorado 3 mi e Placerville (at Institute of Forest Genetics); Institute of Forest Genetics, e of Placerville 822 Comment
  SEINET898177 Image available Astragalus lentiginosus G. Thomas Robbins, Rimo Bacigalupi 1952-1 3443 Kern Corollas yellow. Along highway between Wasco and Taft on rolling hills just north of Buena Vista Lake, Comment
  JEPS7473  Astragalus lentiginosus var. nigricalycis G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3443 Kern along highway between Wasco and Taft on rolling hills just n Buena Vista Lake; n of Buena Vista Lake, between Wasco and Taft Comment
  RSA109602  Astragalus lentiginosus var. nigricalycis G. Thomas Robbins, R. C. Bacigalupi 1952-4-19 3443 Kern Along Hwy between Wasco and Taft on rolling hills just north of Buena Vista Lake. Comment
  JEPS7463  Astragalus lentiginosus var. variabilis G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3441 Kern on road to Kramer about 10 mi e Mohave (Mohave Desert); , e of Mohave 792 Comment
  RSA0006806  Astragalus lentiginosus var. variabilis G. Thomas Robbins, R. C. Bacigalupi 1952-4-19 3441 Kern 10 miles east of Mojave Comment
  RSA0006830  Astragalus nuttallianus var. imperfectus G. Thomas Robbins, R. C. Bacigalupi 1952-4-28 3473 San Bernardino Rocky slopes near Mitchell's Caverns, Providence Mtns. 1372 Comment
  CAS-BOT-BC193328  Astragalus tener var. tener G. Thomas Robbins 1959-4-11 3977 Alameda About 1/4 mile north of the west end of Depot Road, adjacent to (just east of) the American Salt Co. evaporating ponds along the shore of San Francisco Bay, about 1 3/4 miles northwest of Mt. Eden and about 3/4 miles south of Russell 1 Comment
  UC747639  Athyrium distentifolium var. americanum G. Thomas Robbins 1945-8-3 2075 El Dorado just below summit Tells Peak (slopes on e face); Desolation Valley Wilderness Area 2743 Comment
  UC964856  Athyrium distentifolium var. americanum G. Thomas Robbins 1945-8-3 2075 El Dorado just below summit Tells Peak (e face); Desolation Valley Wilderness Area 2743 Comment
  CAS-BOT-BC68081  Athyrium filix-femina subsp. cyclosorum G. Thomas Robbins 1944-6-7 1657 El Dorado North Fork Webber Creek, 3 mi. e. of Camino 975 Comment
  JEPS20852  Athyrium filix-femina var. cyclosorum G. Thomas Robbins 1956-9-14 3783 El Dorado ca. 1/2 mi nw of Echo Summit (along U.S. Hwy 50) 2225 Comment
  UC747644  Athyrium filix-femina var. cyclosorum G. Thomas Robbins 1944-6-7 1657 El Dorado 3 mi e Camino (canyon slope above N Fork Webber Creek) 975 Comment
  UC747386  Athysanus pusillus G. Thomas Robbins 1943-4-10 988 El Dorado 3 mi e of Camino (above North Fork Webber Creek) 975 Comment
  JEPS15531  Atriplex leucophylla G. Thomas Robbins 1956-8-18 3739 San Mateo along ocean shore near the mouth Pomponio Creek; near mouth Pomponio Creek Comment
  JEPS25154  Atriplex leucophylla G. Thomas Robbins with John Weiler 1959-5-23 4024 Contra Costa on breakwater northwestern extension Brooks Island (Richmond); San Francisco Bay, , Brooks Island Comment
  JEPS25279  Atriplex leucophylla G. Thomas Robbins 1959-9-27 4166 Alameda at edge San Francisco Bay about one-half mi e San Francisco-Oakland Bay Bridge Toll Plaza (Oakland); edge San Francisco Bay, Oakland Comment
  UCD97608  Atriplex polycarpa W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS24999  Atriplex semibaccata G. Thomas Robbins 1958-8-9 3923 Alameda waste places around public dump at the w end Willow Road about one-half mi ne Plummer Landing (sw of Newark); , ne of Plummer Landing Comment
  UCD81539  Baccharis douglasii W. W. Robbins; W. D. Norton 1928-8-1 1425 Yolo near Clarksburg. Comment
  UCD81540  Baccharis douglasii W. W. Robbins; W. D. Norton 1928-8-1 1425 Yolo near Clarksburg. Comment
  JEPS22057  Baccharis glutinosa G. Thomas Robbins 1958-7-19 3900 Alameda paralleling S. Pacific railroad on e and Richmond Access Hwy. (Hoffman Blvd.) and S. F. Bay on w, ca. 0.2 mi s of Contra Costa Co. boundary, Albany. Comment
  UC747193  Baccharis pilularis G. Thomas Robbins 1943-11-2 1406 El Dorado 3 mi e of, on slope above Smith Flat Placerville 731 Comment
  SBBG63135  Baccharis pilularis subsp. consanguinea R. C. and J. R. Robbins 1920-10-19 Santa Barbara Hot Springs Rd, Montecito Comment
  SD185462  Baccharis salicifolia Jolynn Robbins 2006-4-9 37 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  UCD129504  Baileya pauciradiata W. W. Robbins 1939-12-24 s.n. San Diego Southeast San Diego County: Exact location unknown. Comment
  UC747152  Balsamorhiza deltoidea G. Thomas Robbins 1944-5-5 1582 El Dorado e and above, 2 1/2 mi e of Placerville Smith Flat 670 Comment
  CAS-BOT-BC106533  Balsamorhiza deltoidea G. Thomas Robbins 1944-5-5 1582 El Dorado Wooded slope e. and above Smith Flat, 2 1/2 mi. e. of Placerville. 670 Comment
  UC747150  Balsamorhiza sagittata G. Thomas Robbins 1945-7-8 2041 El Dorado near Al Tahoe; Lake Tahoe 1920 Comment
  CAS-BOT-BC16384  Barbarea orthoceras G. Thomas Robbins 1944-7-28 1778 El Dorado Along Willow Flat Trail, about 3 miles northeast of Wrights Lake. 2438 Comment
  CAS-BOT-BC16781  Barbarea verna G. Thomas Robbins 1945-5-27 1949 El Dorado North Fork Webber Creek, 1.5 mile south of Camino, along Pleasant Valley Road. 762 Comment
  CAS-BOT-BC16782  Barbarea verna G. Thomas Robbins 1944-5-16 1608 El Dorado Along North Fork Webber Creek, ca. 3 miles east of Camino. 914 Comment
  UCD97585  Bassia hyssopifolia G. Thomas Robbins; D. M. Post, J. W. Dawson, and P. H. Raven 1954-9-3 3648 Stanislaus Along Vernalis-Modesto Road (Maze Road), 5.4 miles east of Vernalis and 1.8 miles east of bridge crossing the San Joaquin River. 7 Comment
  UC907656  Beckmannia syzigachne G. Thomas Robbins with J. T. Howell 1945-5-9 1878 Marin 1/2 mi n Hamilton Field Air Base Comment
  CAS-BOT-BC75601  Berberis dictyota R. C. Robbins; J. Robbins 1921-1-1 s.n. Santa Barbara Mono Canyon Trail. Comment
  UC747391  Berberis nervosa G. Thomas Robbins 1944-5-28 1638 El Dorado 1-2 mi from its confluence with South Fork American River Long Creek 762 Comment
  UCSB8245  Blechnum spicant Robbins, G. 1936-8-1 Humboldt Near Strong's Station. Comment
  GH414796  Blennosperma nanum G. T. Robbins 1945-4-22 1857 Unknown about 2 1/2 mi. e. of Shingle Springs 457 Comment
  UC747431  Boechera howellii G. Thomas Robbins 1944-7-29 1805 El Dorado above Lake Schmidell; Red Peak, Desolation Valley Wilderness Area 2651 Comment
  RSA0034611  Boisduvalia densiflora var. densiflora G. Thomas Robbins 1943-6-21 1206 El Dorado West of Institute of Forest Genetics, 3 miles E of Placerville 732 Comment
  RSA41252  Boisduvalia densiflora var. densiflora G. Thomas Robbins 1944-8-15 1828 El Dorado Along U.S. Highway 50, three miles east of Placerville 671 Comment
  RSA41255  Boisduvalia stricta G. Thomas Robbins 1944-6-9 1667 El Dorado Institute of Forest Genetics, 3 miles east of Placerville 793 Comment
  JEPS22012  Bolboschoenus maritimus G. Thomas Robbins 1958-6-14 3868 Alameda in wet clay on banks of slough along Mt. Eden Road about 1 1/2 mi n Alvarado; n of Alvarado 1 Comment
  UCD56847  Bouteloua barbata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS9711  Bowlesia incana G. Thomas Robbins 1955-4-16 3652 Alameda about 1 mi s of Alvarado (along Marsh Road); Marsh Road 1 Comment
  RSA32295  Boykinia occidentalis G. Thomas Robbins 1943-6-17 1187 El Dorado Near head of Long canyon. 2-3 miles E of Pollock Pines. 976 Comment
  UC747439  Brassica nigra G. Thomas Robbins 1943-7-10 1257 El Dorado Eddy Arboretum, Institute of Forest Genetics, 3 miles E of Placerville. 822 Comment
  JEPS25250  Brickellia californica G. Thomas Robbins with John Weiler 1959-8-6 4130 Monterey about 6 mi s of Pfeiffer-Big Sur State Park and the crossing of the Big Sur River, along State Highway 1 Pfeiffer-Big Sur State Park 182 Comment
  OBI16910  Brickellia californica G. Thomas Robbins, John Weiler 1959-8-6 4130 Monterey State Hwy 1 about 6 mi S of Pfeiffer-Big Sur State Park and the crossing of Bug Sur River; 183 Comment
  JEPS15529  Brickellia greenei G. Thomas Robbins with L. R. Heckard 1956-7-25 3729 Lake along trail to, se of Snow Mt. (s and below Fouts Camp, on ridge forming the county <Lake, Colusa> boundary) 1828 Comment
  SEINET195653  Brodiaea coronaria subsp. coronaria G. Thomas Robbins 1943-5-28 1099 El Dorado At western edge of Institute of Forest Genetics 3 miles east of Placerville 732 Comment
  UC747523  Brodiaea minor G. Thomas Robbins 1945-5-20 1918 El Dorado 3 mi. e. Rescue (along Placerville-Rescue Rd.) 457 Comment
  UC747541  Brodiaea minor G. Thomas Robbins 1944-6-27 1737 El Dorado top of ridge above North Fork Webber Creek (about 3 mi e of Camino) 975 Comment
  SEINET799043  Bromus carinatus G. Thomas Robbins 1943-1 1178 El Dorado In Arboretum of Institute of Forest Genetics, 3 miles E. of Placerville 822 Comment
  JEPS25124  Bromus carinatus var. carinatus G. Thomas Robbins 1959-4-18 3991 Contra Costa near and n of Point Richmond (w base of Potrero Hills, along Western Drive); Richmond, Potrero Hills, Western Drive 4 Comment
  SEINET943642  Bromus carinatus var. carinatus G. Thomas Robbins 1944-1 1696 El Dorado Institute of Forest Genetics, 3 miles E. of Placerville 822 Comment
  UCD59870  Bromus tectorum Robbins; Raynor 1943-6-1 s.n. Modoc Modoc County Comment
  UC1600434  Calamagrostis canadensis G. Thomas Robbins 1951-7-30 3403 Fresno about 1 mi w of Bear Creek (s and w of Hilgard Branch of Bear Creek) 2926 Comment
  UC1084389  Calandrinia ciliata G. Thomas Robbins 1937-4-11 99 San Mateo grassy meadow near Spring Valley Lakes (along road to Woodside) Comment
  UC1084413  Calandrinia ciliata G. Thomas Robbins 1937-4-11 105 San Mateo grassy meadow near Spring Valley Lakes (along road to Woodside) Comment
  CAS-BOT-BC438379  Calandrinia ciliata G. Thomas Robbins 1944-6-13 1681 El Dorado At Institute of Forest Genetics, 3 mi. e. of Placerville 822 Comment
  GH356744  Calocedrus decurrens G. T. Robbins 1944-10-15 1832 Unknown C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  RSA41257  Calocedrus decurrens G. Thomas Robbins 1944-10-15 1832 El Dorado At CCC Camp Snowlie, 3 mile east of Camino 1037 Comment
  SEINET195490  Calocedrus decurrens G. T. Robbins 1944-2-6 1484 El Dorado At CCC Camp Snowline 3 mi E of Camino 1036 Comment
  SEINET195492  Calocedrus decurrens G. T. Robbins 1944-10-15 1832 El Dorado At CCC Camp Snowline 3 mi E of Camino 1036 Comment
  UCD139459  Calochortus albus W. W. Robbins 1926-4-17 512 Nevada Grass Valley. Comment
  UCD139460  Calochortus albus W. W. Robbins 1928-4-29 974 Unknown County Unknown: American River. Comment
  GH357319  Calochortus clavatus var. avius G. T. Robbins 1944-7-12 1762 Unknown North Fork Webber Creek, about 3 miles east of Camino, El Dorado County 914 Comment
  UC747010  Calochortus clavatus var. avius G. Thomas Robbins 1944-7-12 1762 El Dorado about 3 mi e Camino (on slope above North Fork Webber Creek) 914 Comment
  UC747533  Calochortus clavatus var. avius G. Thomas Robbins 1945-7-16 2064 El Dorado about 3 mi e Camino (on slope above North Fork Webber Creek) 914 Comment
  CAS-BOT-BC487800  Calochortus coeruleus G. Thomas Robbins 1944-6-18 1727 El Dorado Along Capps Crossing Road on Camp Creek Ridge 1371 Comment
  RSA32302  Calochortus leichtlinii G. Thomas Robbins 1943-7-25 1284 El Dorado Above Lake Le Conte E of Medley Lakes, Desolation Valley Wilderness Area. 2591 Comment
  SBBG57703  Calochortus luteus J. R. and R. C. Robbins 1932-6-9 San Luis Obispo 10 mi inland from Cayucos 304 Comment
  SBBG57727  Calochortus luteus J. R. and R. C. Robbins 1932-6-8 Tulare Sequoia Nat Park 914 Comment
  CAS-BOT-BC492568  Calochortus minimus G. Thomas Robbins 1943-4-25 1029 El Dorado Open Ponderosa pine woods on ridge SE and above North Fork Webber Creek cayon, ca. 3 mi. e. of Camino. 1036 Comment
  RSA32312  Calochortus minimus G. Thomas Robbins 1943-7-25 1300 El Dorado Along trail to Echo Lake, about 1/2 mile southeast of Desolation Valley Wilderness Area 2439 Comment
  UCD139563  Calochortus monophyllus W. W. Robbins 1926-4-17 516 Nevada Grass Valley. Comment
  CAS-BOT-BC492620  Calochortus monophyllus G. Thomas Robbins 1943-3-31 977 El Dorado At western edge of Institute of Forest Genetics above Smith Flat 792 Comment
  POM196053  Calochortus monophyllus L. F. Robbins 1928-4-29 s.n. El Dorado Above Placerville. Comment
  GH404196  Calochortus nudus G. T. Robbins 1943-4-25 1029 Unknown ridge south east and above North Fork Webber Creek, about 3 miles east of Camino 1036 Comment
  UC747522  Calochortus superbus G. Thomas Robbins 1943-5-29 1106 El Dorado 3 mi e Placerville (slope at w edge of Institute of Forest Genetics); Institute of Forest Genetics 731 Comment
  UC1057483  Calochortus tolmiei G. Thomas Robbins 1938-4-15 254 Sonoma 2.5 mi e Bodega Bay Comment
  UCSB641  Calochortus tolmiei Robbins, G. 1938-4-15 Sonoma About 2.5 miles east of Bodega Bay Comment
  CAS-BOT-BC496753  Calochortus venustus G. Thomas Robbins 1943-5-29 1106 El Dorado Open, grassy areas on Digger pine woodland slope at western edge on Institute of Forest Genetics, 3 mi. e. of Placerville. 731 Comment
  UC747594  Calycadenia multiglandulosa G. Thomas Robbins 1943-5-28 1101 El Dorado Western edge of Institute of Forest Genetics 731 Comment
  UC747175  Calycadenia truncata G. Thomas Robbins 1943-7-15 1269 El Dorado 3 mi e Camino; North Fork Webber Creek 975 Comment
  UC907779  Calycadenia truncata G. Thomas Robbins 1944-6-9 1665 El Dorado 3 mi e, near Institute of Forest Genetics Placerville 762 Comment
  CAS-BOT-BC275358  Calycadenia truncata var. truncata G. Thomas Robbins 1943-7-15 1269 El Dorado Above N Fork Webber Creek, about 3 miles E of Camino 975 Comment
  SD45400  Calyptridium monandrum G. Thomas Robbins 1950-4-2 3300 Kern Above Kern River about 1 mile northeast of Isabella 760 Comment
  SBBG69675  Calyptridium monospermum J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC746852  Calyptridium umbellatum G. Thomas Robbins 1943-7-25 1304 El Dorado 2 mi nw of Echo Lake (along Desolation Valley trail near Haypress Meadows); Desolation Valley trail 2438 Comment
  SEINET195175  Calyptridium umbellatum G. T. Robbins 1943-7-25 1304 El Dorado Along the Desolation Valley trail near Haypress Meadows ca 2 mi NW of Echo Lake 2438 Comment
  UC747570  Calystegia occidentalis subsp. occidentalis G. Thomas Robbins 1943-5-25 1090 El Dorado 3 mi e Placerville (Institute of Forest Genetics); e of Placerville, Institute of Forest Genetics 822 Comment
  RSA32313  Camassia leichtlinii subsp. suksdorfii G. Thomas Robbins 1943-8-15 1348 El Dorado In drainage streamlet of Grouse Lake, 2.5 miles northeast of Wrights Lake Comment
  UC747520  Camassia quamash G. Thomas Robbins 1943-8-15 1348 El Dorado 2 1/2 mi ne of Wrights Lake (in streamlet of Grouse Lake); Grouse Lake 2438 Comment
  UC1084506  Camissonia campestris subsp. campestris G. Thomas Robbins 1940-5-19 328 Contra Costa e Antioch (slope above river); San Joaquin River Comment
  RSA41256  Camissonia ovata G. Thomas Robbins 1944-4-14 1502 Marin Just north of Big Rock Ridge, ca. 3 miles west of Hamilton Field Air Base 30 Comment
  UC1084495  Camissoniopsis cheiranthifolia subsp. cheiranthifolia G. Thomas Robbins 1940-5-15 316 San Francisco Sunset District San Francisco (sand hills) Comment
  JEPS19404  Campanula californica G. Thomas Robbins 1938-6-23 269 Sonoma ca 10 mi w Santa Rosa (on Pitkin ranch, Vine Hill region); Vine Hill Comment
  JEPS22066  Campanula californica G. Thomas Robbins with S. Galen Smith 1958-7-8 3892 Marin along roadside to McClure Beach (0.2 mi w of Sir Francis Drake Highway) 114 Comment
  UC747045  Campanula prenanthoides G. Thomas Robbins 1945-8-6 2110 El Dorado woods about 1/2 mi w Long Meadow (near Schlien Ranger Station) 1676 Comment
  SEINET10463056  Campanula prenanthoides Robbins 1945-8-6 ROBBINS 2110 El Dorado About 0.5 mile west of Long Meadow near Schlien Ranger Station. T13N R14E Sec. 14 1676 Comment
  SEINET195481 Image available Campanula prenanthoides G. Thomas Robbins 1943-6-20 1195 El Dorado Above South Fork of American River 4-5 mi. W of Pollock Pines. 914 Comment
  SEINET1869535  Campanulaceae G. Thomas Robbins, R. Bacigalupi, L. Constance, G. W. Gillett and L. R. Heckard 1952-1 3488 -A Inyo McLain Park, 8.8 miles south of Shoshone. 427 Comment
  UC747429  Capsella bursa-pastoris G. Thomas Robbins 1944-5-7 1594 El Dorado 3 mi e of Camino (along North Fork Webber Creek, on site of abandoned sawmill); North Fork Webber Creek 914 Comment
  UCSB2275  Capsella bursa-pastoris Robbins, G. 1937-4-4 Alameda Berkeley Hills Comment
  CAS-BOT-BC37413  Cardamine californica G. Thomas Robbins 1944-3-28 1491 El Dorado Along US Highway 50, 3 miles east of Camino. 1036 Comment
  SBBG72219  Cardamine californica J. R. and R. C. Robbins 1932-7-17 Tuolumne Tioga Pass Rd Comment
  UC747398  Cardamine californica G. Thomas Robbins 1944-3-28 1491 El Dorado along U.S. Highway 50 3 mi e Camino; e of Camino 1036 Comment
  UC1057433  Cardamine californica var. californica G. Thomas Robbins 1937-3-25 1 Sonoma bank Sonoma Creek (Bennett Valley); , bank Sonoma Creek Comment
  UC1084357  Cardamine californica var. integrifolia G. Thomas Robbins 1937-3-26 16 Sonoma along highway to Sebastopol just w Wright School; w of Wright School Comment
  CAS-BOT-BC38123  Cardamine pensylvanica G. Thomas Robbins 1944-5-7 1591 El Dorado Park Creek, near Sly Park, 5 miles south of Pollock Pines. 975 Comment
  UCD129928  Carduus tenuiflorus W. W. Robbins 1951-6-2 s.n. Alameda Berkeley. Comment
  JEPS15542  Carex athrostachya G. Thomas Robbins with L. R. Heckard 1956-7-25 3700 Lake Eastern base of ridge that forms a southeastern extension of Snow Mt. West, 1/2 air mile from its summit; [Continues in Notes field] 1981 Comment
  CAS-BOT-BC18100  Carex athrostachya G. Thomas Robbins; L. R. Heckard 1956-7-25 3700 Lake Lake - Colusa County boundary. 1981 Comment
  JEPS25138  Carex barbarae G. Thomas Robbins 1959-5-16 4008 Contra Costa Caly [clay] banks and rivulet just north of Point Orient, Potrero Hills, overlooking San Francisco Bay, Richmond Comment
  JEPS25239  Carex barbarae G. Thomas Robbins 1959-8-1 4116 Contra Costa Las Trampas Creek, about 1 1/2 miles SE of St. Mary's College 182 Comment
  RSA153458  Carex barbarae G. Thomas Robbins 1959-5-16 4008 Contra Costa Just north of Pt. Orient, Potrero Hills, overlooking San Francisco Bay, Richmond. Comment
  JEPS25252  Carex bolanderi G. Thomas Robbins with John Weiler 1959-8-7 4135 Monterey 3.5 to 4 mi n (old) Gorda (along Mill Creek, just below bridge crossing on State Highway 1); Mill Creek 12 Comment
  CAS-BOT-BC34307  Carex congdonii G. Thomas Robbins 1951-8-3 3405 Fresno On northeastern slopes of Glacier Divide at its northern extremity, 2-3 miles south and east of Hutchinson Meadow. 3352 Comment
  UC907720  Carex densa G. Thomas Robbins 1945-5-15 1903 El Dorado 1/2 mi e Smithflat 701 Comment
  UC907785  Carex densa G. Thomas Robbins 1945-5-9 1885 Marin 1/2 mi n Ignacio Comment
  CAS-BOT-BC34959  Carex densa G. Thomas Robbins 1945-5-15 1903 El Dorado 0.5 mile east of Smithflat. 701 Comment
  CAS-BOT-BC20235  Carex filifolia var. erostrata G. Thomas Robbins 1951-7-24 3390 Fresno Pioneer Basin. 3230 Comment
  UC907665  Carex fracta G. Thomas Robbins 1944-6-7 1662 El Dorado 3 mi E of Camino (North Fork Webber Creek) 914 Comment
  UC907786  Carex gracilior G. Thomas Robbins 1945-5-9 1887 Marin about 1/2 mi n Ignacio Comment
  UC972362  Carex heteroneura G. Thomas Robbins 1951-7-26 3396 Fresno West of Second Recess and Mono Creek; Laurel Creek basin Comment
  CAS-BOT-BC32216  Carex multicostata G. Thomas Robbins 1944-7-29 1801 El Dorado On ridge S and above Lake Schmidell, Desolation Valley Wilderness Area. 2590 Comment
  UC747499  Carex multicostata G. Thomas Robbins 1944-7-29 1801 El Dorado on ridge s and above Lake Schmidell; Desolation Valley Wilderness Area 2590 Comment
  JEPS25166  Carex nudata G. Thomas Robbins 1959-5-31 4038 Marin 2-3 mi nw Lagunitas (about 1 mi within nw park boundary); Samuel P. Taylor State Park, Lagunitas Creek 45 Comment
  JEPS30776  Carex pansa G. Thomas Robbins 1950-5-13 3344 San Luis Obispo sand dunes se Oso Flaco Lake Comment
  JEPS25158  Carex praegracilis G. Thomas Robbins with John Weiler 1959-5-23 4029 Contra Costa at the nw edge of Brooks Island San Francisco Bay, Richmond, Brooks Island Comment
  CAS-BOT-BC118346  Carex praegracilis G. Thomas Robbins; John Weiler 1959-5-23 4029 Contra Costa NW edge of Brooks Island, San Francisco Bay, Richmond. Comment
  JEPS15695  Carex specifica G. T. Robbins 1956-9-10 3762 Alpine Twin Lakes Forest Service public campground, on n shore of Twin Lakes Twin Lakes, Twin Lakes Forest Service public campground 2499 Comment
  UC972337  Carex straminiformis G. Thomas Robbins 1951-7-24 3392 Fresno Pioneer Basin 3230 Comment
  JEPS25105  Carex subbracteata G. Thomas Robbins 1959-4-18 3984 Contra Costa about 1/2 mi e Pt. San Pablo (overlooking San Pablo Bay); San Pablo Bay, Richmond 7 Comment
  JEPS25119  Carex subbracteata G. Thomas Robbins 1959-4-18 3985 Contra Costa 1/2 mi e Pt. San Pablo (overlooking San Pablo Bay); San Pablo Bay, Richmond 7 Comment
  CAS-BOT-BC116916  Carex subbracteata var. subbracteata G. Thomas Robbins 1959-4-18 3984 Contra Costa Overlooking San Pablo Bay, ca 1/2 mi E of Pt. San Pablo, Richmond. 7 Comment
  CAS-BOT-BC116697  Carex subfusca G. Thomas Robbins 1956-9-14 3788 El Dorado Along US Hwy 50, ca 1/2 mi NW of Echo Summit. 2225 Comment
  UC972356  Carex utriculata G. Thomas Robbins 1951-7-26 3393 Fresno w Second Recess and Mono Creek; Laurel Creek basin 3108 Comment
  JEPS7951  Carpenteria californica G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3561 Fresno granite slopes of mountain 4.8 mi se Auberry; Bald Mountain 914 Comment
  JEPS21966  Carthamus tinctorius G. Thomas Robbins with S. Galen Smith 1958-6-2 3850 Contra Costa at junction with U.S. Highway 40 Franklin Canyon Road (State Highway 4) (Hercules (a short distance w of its e boundary)); Hercules, Franklin Canyon Comment
  GH362595  Cassiope mertensiana subsp. californica G. T. Robbins 1943-7-25 1294 Unknown on slopes east of Medley Lakes, Desolation Valley Wilderness Area 2590 Comment
  JEPS23268  Castilleja G. Thomas Robbins with John Weiler 1959-8-8 4148 San Luis Obispo about 1.5 mi sw Oso Flaco Lake; ; HEXAPLOID 15 Comment
  JEPS3653  Castilleja G. T. Robbins and L. R. Heckard 1953-5-31 489 Stanislaus Knights Ferry; Stanislaus River Comment
  OBI9667  Castilleja affinis G. Thomas Robbins, John Weiler 1959-8-8 4148 San Luis Obispo About 1.5 mi SE of Oso Flaco Lake 15 Comment
  SBBG100029  Castilleja affinis G. T. Robbins, K. Harrison 1955-5-16 5140 San Luis Obispo upper reaches of Camatta Cyn, 1.6 mi N of jct of Camatta Cyn Rd, with direct rd from La Panza to Creston 396 Comment
  JEPS15585  Castilleja affinis subsp. affinis G. Thomas Robbins 1956-8-18 3741 San Mateo immediately n mouth of Butano Creek (nw of Pescadero) Comment
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Feb 28 2011
  JEPS15586  Castilleja affinis subsp. affinis G. Thomas Robbins 1956-8-18 3740 San Mateo immediately n mouth of Butano Creek (nw of Pescadero) Comment
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Feb 28 2011
  JEPS19384  Castilleja affinis subsp. affinis G. Thomas Robbins 1940-5-15 319 San Francisco Sunset District San Francisco Comment
  JEPS19387  Castilleja affinis subsp. affinis G. Thomas Robbins 1937-4-17 119 Contra Costa near Point Richmond Comment
  JEPS19388  Castilleja affinis subsp. affinis G. Thomas Robbins 1940-3-24 309 Sonoma about 6 mi e Santa Rosa (on Rincon Grade); Rincon Grade 167 Comment
  JEPS23818  Castilleja affinis subsp. affinis G. Thomas Robbins 1959-4-18 3990 Contra Costa about 0.25 mi e and above Pt. San Pablo; Richmond 30 Comment
  JEPS7782  Castilleja affinis subsp. affinis G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3568 Fresno 2.5 mi se Auberry; Bald Mountain 786 Comment
  JEPS22700  Castilleja affinis subsp. affinis G. Thomas Robbins 1958-5-9 3826 San Francisco w of (opposite) Lake Merced (along Skyline Blvd (State Highway 5), 0.2 mi s of entrance to Harding Park Golf Course); San Francisco 16 Comment
  JEPS5392  Castilleja affinis subsp. affinis G. Thomas Robbins and R. Bacigalupi 1952-4-15 3413 Monterey about 3 mi n Kings City (just off U.S. Hwy 101) Comment
  GH365404  Castilleja ambigua G. T. Robbins 1945-5-9 1899 Unknown 1/2 mile north of Hamilton Field Air Base Comment
  JEPS5587  Castilleja angustifolia G. T. Robbins and Rimo Bacigalupi 1952-5-1 3492 Inyo head of Titus Canyon, at the site of Leadfield Death Valley National Monument, Titus Canyon 1645 Comment
  JEPS15576  Castilleja applegatei subsp. pallida G. Thomas Robbins 1956-9-10 3773 Alpine about 2 air mi s Carson Pass (along trail to Elephants Back, w shore of Winnemucca Lake); Winnemucca Lake 2743 Comment
  CAS-BOT-BC249414  Castilleja applegatei subsp. pallida G. Thomas Robbins 1956-9-10 3773 Alpine Above west shore of Winnemucca Lake, along trail to Elephants Back, about 2 miles airline south of Carson Pass 2743 Comment
  CAS-BOT-BC249419  Castilleja applegatei subsp. pallida G. Thomas Robbins 1956-9-10 3773 Alpine Above west shore of Winnemucca Lake, along trail to Elephants Back, about 2 miles airline south of Carson Pass 2743 Comment
  UC907705  Castilleja applegatei subsp. pinetorum G. Thomas Robbins 1943-5-2 1061 El Dorado ca 3 mi e Camino (slope above North Fork Webber Creek) 914 Comment
  UC907744  Castilleja applegatei subsp. pinetorum G. Thomas Robbins 1945-7-8 2045 El Dorado near Al Tahoe; Lake Valley 1920 Comment
  JEPS7771  Castilleja attenuata G. Thomas Robbins 1953-5-8 3523 Calaveras about 1 mi w Murphys; Angles Creek Canyon 670 Comment
  JEPS7780  Castilleja attenuata G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3551 Tulare about 10.5 mi se Three Rivers (above canyon of South Fork of Kaweah River) 908 Comment
  UC747126  Castilleja attenuata G. Thomas Robbins 1945-5-17 1909 El Dorado about 3 mi e Camino (canyon side above the North Fork Webber Creek) 1005 Comment
  JEPS14536  Castilleja attenuata G. Thomas Robbins with Peter H. Raven 1956-4-29 3683 El Dorado se edge Placerville; Spanich Ravine 594 Comment
  JEPS4482  Castilleja brevistyla G. T. Robbins and Rimo Bacigalupi 1952-4-16 3423 Kern opposite Bodfish Post Office (at road junction of Calif State Highway 178 and the road s to Havilah) 807 Comment
  UCSB5969  Castilleja chromosa Robbins, G.; Bacigalupi, Rimo 1952-4-17 Kern Alluvial slopes above (west of) Homestead, on U.S. Highway No. 6, 4.7 miles north of Freeman Junction Comment
  JEPS19403  Castilleja densiflora subsp. densiflora G. Thomas Robbins 1937-4-11 113 San Mateo above Redwood City Comment
  UC747109  Castilleja exserta G. Thomas Robbins 1943-4-18 1001 Sacramento about 15 mi ne Sacramento; Carmichael District Comment
  JEPS14537  Castilleja exserta subsp. exserta G. Thomas Robbins with Peter H. Raven 1956-4-29 3686 El Dorado 1.2 mi nw Somerset (Youngs) (s-facing slope of canyon of North Fork Cosumnes River) Comment
  JEPS19395  Castilleja exserta subsp. exserta G. Thomas Robbins 1938-4-15 261 Sonoma 6-7 mi w Santa Rosa (along road to Graton) Comment
  JEPS14535  Castilleja lacera G. Thomas Robbins with Peter H. Raven 1956-4-29 3682 El Dorado se edge Placerville; Spanish Ravine 594 Comment
  UC907611  Castilleja lacera G. Thomas Robbins 1945-5-20 1921 El Dorado 3 mi e Rescue (along Placerville-Rescue road) 457 Comment
  JEPS16376  Castilleja latifolia G. Thomas Robbins 1956-12-30 3798 Monterey near Marina; Monterey Bay, Marina Beach Comment
  CAS-BOT-BC251408  Castilleja lemmonii G. Thomas Robbins 1944-7-28 1785 El Dorado Moist meadow on rocky granite slope along Willow Flat Trail, 1/4 mi. w. of Rockbound Pass 2438 Comment
  UC907747  Castilleja lemmonii G. Thomas Robbins 1944-7-28 1785 El Dorado 0.25 mi w Rockbound Pass (along Willow Flat Trail) 2438 Comment
  UC907618  Castilleja lineariloba G. Thomas Robbins 1944-5-15 1603 El Dorado 3 mi e Placerville (near Institute of Forest Genetics) 762 Comment
  UCD122590  Castilleja lineariloba W. W. Robbins 1928-4-29 958 El Dorado American River. Comment
  RSA32378  Castilleja miniata G. Thomas Robbins 1944-7-28 1773 El Dorado Willow Flat Trail at Willow Flat, ca. 3 mi. NE of Wrights Lake. 2287 Comment
  JEPS6871  Castilleja nana G. Thomas Robbins 1954-7-24 3630 Tulare upper reaches Crabtree Creek; Sequoia National Park 3444 Comment
  UC747085  Castilleja nana G. Thomas Robbins 1944-7-28 1777 El Dorado 2-3 mi ne Wrights Lake (along Willow Flat Trail) 2286 Comment
  UC747091  Castilleja nana G. Thomas Robbins 1943-9-5 1388 El Dorado near summit of Dicks Pass (below Dicks Peak); Dicks Pass 2895 Comment
  UC907745  Castilleja nana G. Thomas Robbins 1945-8-12 2126 El Dorado near summit of Freel Peak; Freel Peak 3322 Comment
  UC907728  Castilleja parviflora G. Thomas Robbins 1943-7-25 1302 El Dorado ca 2 mi nw Echo Lake (at edge of Haypress Meadows); Haypress Meadows 2438 Comment
  UC907743  Castilleja parviflora G. Thomas Robbins 1944-7-28 1796 El Dorado along shore Lake Lois (Rockbound Valley); Desolation Valley Wilderness Area, Rockbound Valley 2590 Comment
  UC907746  Castilleja parviflora G. Thomas Robbins 1944-7-28 1786 El Dorado 0.25 mi w Rockbound Pass (along Willow Flat Trail) 2438 Comment
  RSA102185  Castilleja peirsonii G. Thomas Robbins 1944-7-28 1796 El Dorado Along shore of Lake Lois, Rockbound Valley, Desolation Valley Wilderness Area. 2591 Comment
  JEPS7055  Castilleja praeterita G. Thomas Robbins 1954-7-20 3623 Tulare above Whitney Creek (along John Muir Trail below Timberline Lake and above Crabtree Meadows); Sequoia National Park 3352 Comment
  JEPS19385  Castilleja subinclusa subsp. franciscana G. Thomas Robbins 1938-4-15 256 Sonoma 2.5 mi e Bodega Bay (along road to Bodega) Comment
  OBI9706  Castilleja subinclusa subsp. franciscana G. Thomas Robbins 1955-6-4 3656 Marin Bluffs facing the ocean, NW of Rodeo Lagoon Comment
  JEPS16121  Castilleja subinclusa subsp. subinclusa G. Thomas Robbins, and Rimo Bacigalupi with Lindoln Constance, George Gillett, and L. R. Heckard 1952-4-26 3461 Kern about 6 mi w Democrat Hot Springs (slope above Kern River); Kern River Canyon 533 Comment
  OBI9684  Castilleja subinclusa subsp. subinclusa G. Thomas Robbins & Rimo Bacigalupi, Rimo Bacigalupi 1952-4-16 3415 San Luis Obispo 1/4 mi W of summit of Cottonwood Pass, near the San Luis Obispo-Kern county line, along state hwy 41 762 Comment
  JEPS19386  Castilleja uliginosa G. Thomas Robbins 1937-6-5 218 Sonoma about 10 mi w Santa Rosa (marsh on Pitkin Ranch); Vine Hill Region Comment
  CAS-BOT-BC48562  Ceanothus cordulatus G. Thomas Robbins 1943-6-4 1113 El Dorado above Silver Fork American River near Sacramento Box Sawmill (China Flat) ca. 2 mi. s. of Kyburz 1371 Comment
  SACT002901  Ceanothus cordulatus G. Robbins 1943-6-4 El Dorado Low shrub, 2-3 feet high with wide spreading branches. Common on wooded slope above Silver Fork of American River near Sacramento Box Sawmill. 2-3 miles south of Kyburz. Comment
  SBBG71355  Ceanothus cordulatus J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC746925  Ceanothus cordulatus G. Thomas Robbins 1945-8-5 2089 El Dorado Rockbound Lake Desolation Valley Wilderness Area, Rockbound Valley 2011 Comment
  UC907784  Ceanothus cuneatus G. Thomas Robbins 1944-4-23 1545 El Dorado ca 1 mi e Camino (along US Hwy 50) 975 Comment
  SBBG71417  Ceanothus cuneatus var. cuneatus J. R. and R. C. Robbins 1930-3-28 Kern Kern Cyn Comment
  CAS-BOT-BC49811  Ceanothus diversifolius G. Thomas Robbins 1943-4-29 1045 El Dorado Open pine woods along U.S. Highway 50 at C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  SEINET13945885 Image available Ceanothus foliosus G. Thomas Robbins 1940-1 302 Sonoma along Guernerville road, Vine Hill Region, ca 8.5 mi W of Santa Rosa Comment
  JEPS25144  Ceanothus foliosus var. foliosus G. Thomas Robbins 1959-5-16 4014 Sonoma Spring Mountain Road, between Calistoga Road and Sonoma-Napa County line Mayacamas Mountains 518 Comment
  UC1084442  Ceanothus foliosus var. vineatus G. Thomas Robbins 1940-3-22 302 Sonoma ca. 8.5 mi. w. Santa Rosa (along Guerneville rd., Vine Hill region); Vine Hill region Comment
  UC1084483  Ceanothus foliosus var. vineatus G. Thomas Robbins 1938-4-15 257 Sonoma along road to Occidental W q Green Valley. Comment
  UC746922  Ceanothus fresnensis G. Thomas Robbins 1945-8-5 2095 El Dorado Along Georgetown Road, 4-5 mi E of Wentworth Springs 1981 Comment
  UC907782  Ceanothus fresnensis G. Thomas Robbins 1945-4-22 1843 El Dorado 2-3 mi nw. Shingle Springs 457 Comment
  JEPS19405  Ceanothus gloriosus var. exaltatus G. Thomas Robbins 1940-3-22 300 Sonoma about 8.5 mi W of Santa Rosa (along Guernville Road) 45 Comment
  UC631633  Ceanothus gloriosus var. exaltatus G. Thomas Robbins 1940-3-22 300 Sonoma Guerneville road, Vine Hill region, about 8 1/2 miles west of Santa Rosa. 45 Comment
  CAS-BOT-BC50116  Ceanothus integerrimus G. Thomas Robbins 1943-4-30 1059 El Dorado at Institute of Forest Genetics, 3 mi. E. of Placerville 792 Comment
  UC746919  Ceanothus integerrimus G. Thomas Robbins 1943-7-23 1282 El Dorado 3 mi e. Camino 1036 Comment
  CAS-BOT-BC51739  Ceanothus lemmonii G. Thomas Robbins 1945-4-22 1848 El Dorado 2-3 mi. NW of Shingle Springs 457 Comment
  UC746924  Ceanothus lemmonii G. Thomas Robbins 1945-4-22 1848 El Dorado 2-3 mi nw of Shingle Springs 457 Comment
  UC907681  Ceanothus lemmonii G. Thomas Robbins 1945-4-20 1944 El Dorado nw of Rescue (along Deer Valley Rd) 304 Comment
  UCD112187  Ceanothus lemmonii W. W. Robbins 1926-4-17 521 Nevada Grass Valley. Comment
  UCD112188  Ceanothus lemmonii W. W. Robbins 1926-4-17 525 Nevada Grass Valley. Comment
  UCSB4003  Ceanothus oliganthus var. sorediatus Robbins, G. 1937-4-25 Alameda Just east of Claremont Ave., Berkeley Comment
  UC746923  Ceanothus palmeri G. Thomas Robbins 1945-5-20 1919 El Dorado along Placerville-Rescue Road 3 mi e Rescue; along Placerville-Rescue Road 457 Comment
  JEPS25143  Ceanothus parryi G. Thomas Robbins 1959-5-16 4013 Sonoma on Spring Mtn Road between Calistoga Road and Sonoma-Napa County line (along upper Mark West Creek, Mayacamas Mts.); Mayacamas Mts., along upper Mark West Creek 426 Comment
  A425107  Ceanothus prostratus G. T. Robbins 1945-8-12 2142 Unknown along road to HIgh Meadow, 6-8 mi. SE of Lake Tahoe 2133 Comment
  RSA32351  Ceanothus prostratus G. Thomas Robbins 1945-7-8 2059 El Dorado Along Hwy 89 on ridge betw Emerald Bay and Cascade Lake. 1982 Comment
  UC746930  Ceanothus prostratus G. Thomas Robbins 1943-7-23 1281 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline); e of Camino 1036 Comment
  SBBG68548  Ceanothus prostratus var. prostratus J. R. and R. C. Robbins 1932-7-18 El Dorado W side, Lake Tahoe Comment
  JEPS25256  Ceanothus thyrsiflorus G. Thomas Robbins with John Weiler 1959-8-7 4141 San Luis Obispo 1.8 mi n Arroyo de la Cruz (w of State Hwy 1, 5.6 mi s of the Monterey Co. line) Comment
  SBBG71399  Ceanothus thyrsiflorus var. griseus Mrs. J. Robbins 1930-4-12 Santa Barbara Point Sal Comment
  UC746918  Ceanothus tomentosus G. Thomas Robbins 1943-4-25 1034 El Dorado ca 3 mi e Camino (slope above North Fork Webber Creek); above North Fork Webber Creek 914 Comment
  UC746920  Ceanothus tomentosus G. Thomas Robbins 1943-6-29 1240 El Dorado about 3 mi e Camino (above North Fork Webber Creek); North Fork Webber Creek 914 Comment
  A425557  Ceanothus velutinus G. T. Robbins 1945-7-8 2055 Unknown rocky slopes above Eagle Lake along Velma Lakes trail, Desolation Valley Wilderness Area 2286 Comment
  GH425556  Ceanothus velutinus G. T. Robbins 1945-7-8 2055 Unknown rocky slopes above Eagle Lake along Velma Lakes trail, Desolation Valley Wilderness Area 2286 Comment
  SEINET195674  Ceanothus velutinus G. T. Robbins 1945-7-8 2055 El Dorado Desolation Valley Wilderness Area ; Desolation Valley Wilderness Area;above Eagle Lake along Velma Lakes trail 2286 Comment
  UC747321  Ceanothus velutinus G. Thomas Robbins 1945-7-8 2055 El Dorado along Velma Lakes trail above Eagle Lake (Desolation Valley Wilderness Area); Desolation Valley Wilderness Area 2286 Comment
  JEPS22054  Centaurea calcitrapa G. Thomas Robbins 1958-6-21 3875 Alameda parallelling the Eastshore Freeway, between High St. and Hegenberger Rd., Oakland, just w of San Leandro Bay Oakport Rd.; San Leandro Bay Comment
  UCD130008  Centaurea calcitrapa W. W. Robbins 1931-3-31 2171 Solano Vallejo. Comment
  CAS-BOT-BC281999  Centaurea calcitrapa G. Thomas Robbins 1958-6-21 3875 Alameda Along Oakport Rd, paralleling the Eastshore Freeway, between High St and Hegenberger Rd, Oakland, just W of San Leandro Bay Comment
  UCD130010  Centaurea calcitrapa W. W. Robbins 1931-7-26 2241 Solano Near Benicia Reservoir, Benicia. Comment
  UC747606  Centaurium venustum G. Thomas Robbins 1943-7-15 1267 El Dorado about 3 mi e Camino (canyon slope above North Fork Webber Creek) 975 Comment
  UC1008643  Centaurium venustum G. Thomas Robbins 1943-6-21 1205 El Dorado above Smith Flat (w of Institute of Forest Genetics) 822 Comment
  UCD81542  Centromadia fitchii W. W. Robbins; W. D. Norton 1927-10-1 822 Yolo West of Davis. Comment
  CAS-BOT-BC288562  Centromadia fitchii G. Thomas Robbins 1956-9-7 3744 El Dorado Along US Highway 50, 4 miles W of Shingle Springs 350 Comment
  JEPS22111  Centromadia parryi subsp. congdonii G. Thomas Robbins 1958-8-9 3921 Alameda alkaline flats along Willow Road (about 3/4 mi ne of Plummer Landing, sw of Newark) Comment
  JEPS25089  Centromadia parryi subsp. congdonii G. Thomas Robbins 1958-10-11 3947 Alameda low field at edge San Francisco Bay (at w end of West Ave. 135); western San Leandro, Mulford Gardens section Comment
  UCD130155  Centromadia parryi subsp. rudis W. W. Robbins; W. D. Norton 1927-10-1 833 Yolo West of Davis. Comment
  JEPS30777  Centunculus minimus G. Thomas Robbins with J. T. Howell 1945-5-9 1883 Marin 1/2 mi n of Hamilton Field Air Base Comment
  UC746955  Cephalanthera austiniae G. Thomas Robbins 1943-6-8 1142 El Dorado ca. 3 mi. e. Camino (N. Fork Webber Creek); N. Fork Webber Creek 914 Comment
  UC746962  Cephalanthera austiniae G. Thomas Robbins 1944-6-29 1746 El Dorado ca. 3 mi. e. Camino (along bank N. Fork Webber Creek); N. Fork Webber Creek 914 Comment
  UC1084416  Cerastium glomeratum G. Thomas Robbins 1937-4-11 101 San Mateo near Spring Valley Lakes along rd. to Woodside Comment
  CAS-BOT-BC179511  Cercis occidentalis G. Thomas Robbins 1945-4-22 1842 El Dorado 2-3 mi NW of Shingle Springs. 457 Comment
  SBBG68355  Cercis occidentalis J. R. and R. C. Robbins 1930-3-28 Kern S Fork Kern River, 10 mi E of Isabella Comment
  UC746998  Cercocarpus betuloides var. betuloides G. Thomas Robbins 1944-4-30 1570 El Dorado 3-4 mi ne of Newton (above South Fork Webber Creek) 914 Comment
  GH345447  Cercocarpus ledifolius G. T. Robbins 1945-8-12 2136 Unknown rocky slope above shore of Star Lake, along trail to Freel Peak 2804 Comment
  CAS-BOT-BC135621  Cercocarpus ledifolius var. ledifolius G. Thomas Robbins 1945-8-12 2136 El Dorado Rocky slope above shore of Star Lake, along trail to Freel Peak 2804 Comment
  JEPS15684  Chaenactis alpigena G. Thomas Robbins 1956-9-10 3775 Alpine 1 1/2-2 mi airline s of Carson Pass (along trail between Winnemucca Lake and Elephants Back) 2743 Comment
  UC747182  Chaenactis douglasii var. alpina G. Thomas Robbins 1943-9-5 1384 El Dorado near summit of Dicks Peak 3048 Comment
  UC747174  Chaenactis douglasii var. douglasii G. Thomas Robbins 1943-7-25 1326 El Dorado 1/2 mi s Echo Lake 2194 Comment
  UC907771  Chaenactis douglasii var. douglasii G. Thomas Robbins 1945-7-8 2048 El Dorado near Al Tahoe (southern shore of Lake Tahoe); Lake Tahoe 1920 Comment
  CAS-BOT-BC276519  Chaenactis douglasii var. douglasii G. Thomas Robbins 1945-7-8 2048 El Dorado Near Al Tahoe, S shore of Lake Tahoe 1920 Comment
  RSA32387  Chaenactis douglasii var. douglasii G. Thomas Robbins 1943-7-25 1326 El Dorado Along roadside 0.5 mile south of Echo Lake 2195 Comment
  CAS-BOT-BC276862  Chaenactis fremontii G. T. Robbins; Rimo Bacigalupi 1952-4-16 3418 Kern Roadcut about 1/4 mile E of Kern - San Luis Obispo county line, along California State Highway 41, in extreme NW corner of Kern County, Cottonwood Pass 548 Comment
  JEPS8066  Chaenactis glabriuscula var. glabriuscula G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3550 Tulare 10.5 mi se of Three Rivers; South Fork of Kaweah River 908 Comment
  CAS-BOT-BC283929  Chaenactis glabriuscula var. glabriuscula G. Thomas Robbins; Peter H. Raven 1956-4-28 3680 El Dorado Along Georgetown - Greenwood Rd, 2 miles W of Greenwood, 8.3 miles W of Georgetown 502 Comment
  CAS-BOT-BC277633  Chaenactis glabriuscula var. megacephala G. Thomas Robbins 1945-4-22 1864 El Dorado Along U. S. Highway 50, 3 miles east of Shingle Springs 457 Comment
  SD137003  Chaenactis stevioides G. Thomas Robbins 1950-4-7 3323 Inyo Larrea divaricata plain about 5 miles south of Lone Pine 1064 Comment
  GH345148  Chamaebatiaria millefolium G. T. Robbins 1945-10-6 2151 Unknown Among boulders on NW slope of Crater Lake Mt., Lassen National Forest (T.32N., R.8E.) 1981 Comment
  UC747012  Chamaebatiaria millefolium G. Thomas Robbins 1945-10-6 2151 Lassen nw slope ofCrater Lake Mountain, Lassen National Forest Crater Lake Mountain; Lassen National Forest, Crater Lake Mountain 1981 Comment
  SBBG34250  Chamaecyparis lawsoniana R. C. and J. R. Robbins 1930-11-26 Del Norte Smith River Valley Comment
  UC747295  Chamaesyce serpyllifolia G. Thomas Robbins 1944-6-27 1735 El Dorado 3 mi e Camino (slope above North Fork of Webber Creek) 975 Comment
  UCSB4328  Chamerion angustifolium subsp. circumvagum Robbins, G. 1936-8-1 Humboldt Roadside between Carlotta and Strongs Station Comment
  JEPS15549  Cheilanthes gracillima G. Thomas Robbins with L. R. Heckard 1956-7-25 3706 Colusa due s of Snow Mt East (and skirting e base of ridge forming Snow Mt West) 1981 Comment
  UC747645  Cheilanthes gracillima G. Thomas Robbins 1944-4-23 1546 El Dorado slope above Slab Creek near its juncture with S Fork American River 609 Comment
  UC964853  Cheilanthes gracillima G. Thomas Robbins 1944-4-23 1546 El Dorado above Slab Creek near its juncture with S Fork American River 609 Comment
  CAS-BOT-BC68289  Cheilanthes gracillima G. Thomas Robbins 1944-4-23 1546 El Dorado On slope above Slab Creek near its juncture with South Fork American River 609 Comment
  CAS-BOT-BC68290  Cheilanthes gracillima G. Thomas Robbins 1945-6-17 1995 El Dorado On slope above Camp Creek near Baltic Peak 1036 Comment
  SD189615  Chenopodium californicum Jolynn Robbins 2006-4-9 42 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  UCD98334  Chenopodium murale G. Thomas Robbins 1959-2-23 3960 Alameda Vacant lot at west end of San Lorenzo, near western end of Lewelling Blvd. 3 Comment
  UC747659  Chimaphila menziesii G. Thomas Robbins 1945-8-5 2093 El Dorado near Rubicon Springs 1828 Comment
  UC747015  Chlorogalum pomeridianum var. pomeridianum G. Thomas Robbins 1944-6-29 1745 El Dorado ca 3 mi e Camino (above North Fork Webber Creek); North Fork Webber Creek 914 Comment
  OBI9580  Chloropyron maritimum subsp. palustre G. Thomas Robbins, S. Galen Smith 1958-7-8 3894 Marin Salt marsh at NW edge of Schooner Bay. Point Reyes peninsula. 300 yards SW of Sir. Francis Drake Hwy Comment
  JEPS9709  Chorizanthe cuspidata var. cuspidata G. Thomas Robbins 1955-4-23 3653 San Francisco below Olympic Golf Club (San Francisco); San Francisco Comment
  SBBG62197  Chorizanthe membranacea J. R. and R. C. Robbins 1932-6-8 Tulare Marble Fk River 457 Comment
  UC746877  Chorizanthe membranacea G. Thomas Robbins 1943-6-5 1654 El Dorado 3 mi e Camino (above North Fork Webber Creek); above North Fork Webber Creek 975 Comment
  UC746889  Chorizanthe polygonoides var. polygonoides G. Thomas Robbins 1945-5-18 1914 El Dorado 3 mi e Placerville (at edge Eddy Arboretum, Institute of Forest Genetics); e of Placerville, Institute of Forest Genetics 792 Comment
  CAS-BOT-BC247543  Chorizanthe stellulata G. Thomas Robbins; Lawrence R. Heckard 1953-6-1 3570 Madera 6.7 miles northwest of Coarsegold along road to Raymond 332 Comment
  JEPS8285  Chorizanthe stellulata G. Thomas Robbins, Lawrence R. Heckard 1953-6-1 3570 Madera 6.7 mi nw Coarsegold (along road to Raymond); nw of Coarsegold 332 Comment
  A344123  Chrysolepis sempervirens G. T. Robbins 1943-8-15 1360 Unknown Along roadside to Wrights Lake, 2-3 mi. n. of U.S. Highway 50 1981 Comment
  SBBG61422  Chylismia claviformis J. R. and R. C. Robbins 1930-3-25 Los Angeles Mojave Desert Comment
  UCD103869  Chylismia claviformis W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD81559  Cichorium intybus W. W. Robbins; W. D. Norton 1928-8-1 1420 Yolo near Clarksburg. Comment
  UC747135  Cirsium andersonii G. Thomas Robbins 1943-9-5 1395 El Dorado 1-2 m nw Glen Alpine Springs; along Taho-Yosemite trail Comment
  UC747190  Cirsium occidentale var. californicum G. Thomas Robbins 1945-6-17 1991 El Dorado above Camp Creek (near Baltic Peak) 975 Comment
  CAS-BOT-BC280095  Cirsium occidentale var. californicum G. Thomas Robbins 1945-6-17 1991 El Dorado Above Camp Creeek, near Baltic Peak 1036 Comment
  UC747218  Cirsium scariosum var. americanum G. Thomas Robbins 1943-9-5 1372 El Dorado rocky crevices on summit Mt. Tallac 2956 Comment
  OBI12140  Clarkia amoena subsp. huntiana G. Thomas Robbins 1959-5-16 4015 Sonoma Spring Mtn rd, between Califstoga Rd and Sonoma-Napa county line, Mayacamas Mt 488 Comment
  UC747276  Clarkia arcuata G. Thomas Robbins 1944-5-21 1612 El Dorado 3 mi e Camino; North Fork Webber Creek 975 Comment
  CAS-BOT-BC163548  Clarkia arcuata G. Thomas Robbins 1944-5-21 1612 El Dorado On canyon side above North Fork Webber Creek, about 3 mi. e. of Camino Comment
  RSA41253  Clarkia biloba subsp. biloba G. Thomas Robbins 1944-6-9 1669 El Dorado Slope above U.S. Highway 50, about 3 miles east of Placerville 732 Comment
  RSA32307  Clarkia biloba subsp. brandegeeae G. Thomas Robbins 1943-6-21 1207 El Dorado West of Institute of Forest Genetics, 3 miles E of Placerville. 732 Comment
  JEPS25145  Clarkia gracilis subsp. sonomensis G. Thomas Robbins 1959-5-16 4015 Sonoma Spring Mt. Road Mayacamas Mt. (between Calistoga Road and Sonoma-Napa County line) 487 Comment
  UC747236  Clarkia heterandra G. Thomas Robbins 1945-6-17 1987 El Dorado above Camp Creek near Baltic Peak Comment
  CAS-BOT-BC163678  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1943-5-28 1096 El Dorado At western edge of Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC747272  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1945-5-20 1932 El Dorado 4-5 mi s Salmon Falls (near Simpsons Ranch); Sweetwater Creek 182 Comment
  UC747275  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1944-5-22 1628 El Dorado 2-3 mi e Placerville (along U. S. Highway 50) 609 Comment
  RSA32306  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1944-5-22 1628 El Dorado Along U. S. Highway 50, 2-3 miles E of Placerville 610 Comment
  RSA41246  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1943-5-28 1096 El Dorado Western edge of Institute of Forest Genetics, 3 miles east of Placerville 762 Comment
  RSA41251  Clarkia purpurea subsp. quadrivulnera G. Thomas Robbins 1945-5-20 1632 El Dorado Sweetwater Creek near Simpson s Ranch, 4-5 miles south of Salmon Falls 183 Comment
  RSA41250  Clarkia purpurea subsp. viminea G. Thomas Robbins 1945-6-5 2970 El Dorado Hillside above Smithflat 701 Comment
  CAS-BOT-BC164789  Clarkia rhomboidea G. Thomas Robbins 1945-7-15 2061 El Dorado Along U.S. Highway 50, 3 mi. e. of Camino 1036 Comment
  UC747273  Clarkia rhomboidea G. Thomas Robbins 1945-7-15 2061 El Dorado 3 mi e Camino (along U. S. Highway 50) 1036 Comment
  RSA41249  Clarkia rhomboidea G. Thomas Robbins 1945-7-15 2061 El Dorado Along U. S. Highway 50, 3 miles east of Camino 1037 Comment
  CAS-BOT-BC165416  Clarkia unguiculata G. Thomas Robbins 1944-6-9 1668 El Dorado Near Institute of Forest Genetics, 3 mi. e. of Placerville 792 Comment
  RSA41254  Clarkia unguiculata G. Thomas Robbins 1944-6-9 1668 El Dorado Institute of Forest Genetics, 3 miles east of Placerville 793 Comment
  CAS-BOT-BC165726  Clarkia williamsonii G. Thomas Robbins 1945-6-5 1970 El Dorado Above [Smithflat] Smith Flat 701 Comment
  UC746853  Claytonia parviflora subsp. grandiflora G. Thomas Robbins 1943-4-10 987 El Dorado about 3 mi e Camino (slope above North Fork Webber Creek) 975 Comment
  UCD100690  Claytonia parviflora subsp. parviflora W. W. Robbins 1928-4-29 976 Unknown County Unknown: American River. Comment
  UC747549  Clintonia uniflora G. Thomas Robbins 1943-6-13 1174 El Dorado about 1 mi s of Pacific Ranger Station (near Pacific) 1219 Comment
  SBBG66388  Collinsia heterophylla J. R. and R. C. Robbins 1932-6-8 Tulare Marble Fk River 304 Comment
  RSA32407  Collinsia heterophylla G. Thomas Robbins 1944-5-15 1604 El Dorado W. of Institute of Forest Genetics, about 3 mi. E. of Placerville. 762 Comment
  UC747122  Collinsia heterophylla G. Thomas Robbins 1944-5-15 1604 El Dorado about 3 mi e of Placerville (hillside w of Institute of Forest Genetics) 762 Comment
  JEPS19379  Collinsia sparsiflora var. arvensis G. Thomas Robbins 1938-4-15 258 Sonoma 6-7 mi w Santa Rosa (along rd to Graton) Comment
  JEPS16479  Collinsia sparsiflora var. collina G. Thomas Robbins with Peter H. Raven 1956-4-28 3671 El Dorado 1 mi w of w city limits of Placerville (along U.S. Highway 50); U.S. Highway 50, Hangtown Creek 487 Comment
  UC747079  Collinsia sparsiflora var. collina G. Thomas Robbins 1944-4-30 1574 El Dorado 3 - 4 mi e Newtown (along South Fork Webber Creek); South Fork Webber Creek, e of Newtown 914 Comment
  UC747124  Collinsia sparsiflora var. collina G. Thomas Robbins 1945-4-22 1852 El Dorado ca 2.5 mi e Shingle Springs 457 Comment
  JEPS7778  Collinsia tinctoria G. Thomas Robbins, Lawrence R. Heckard 1953-5-30 3541 Tulare ca 7/5 mi n Springville (on rd to Balch Park, ca 0.5 mi e of Milo junction) 609 Comment
  UC747084  Collinsia tinctoria G. Thomas Robbins 1945-6-23 2010 El Dorado 3 mi e of Camino (on canyon slope above North Fork Webber Creek) 975 Comment
  UC747092  Collinsia tinctoria G. Thomas Robbins 1943-5-29 1107 El Dorado 3 mi e of Placerville (at western edge of Institute of Forest Genetics); Institute of Forest Genetics 762 Comment
  UC747612  Collomia grandiflora G. Thomas Robbins 1944-6-27 1740 El Dorado top ridge above North Fork Webber Creek (about 3 mi e of Camino) 975 Comment
  RSA114106  Collomia heterophylla G. Thomas Robbins 1943-6-20 1189 El Dorado near head of Long Canyon, 2 to 3 miles west of Pollock Pines below and just south of road to powerhouse 915 Comment
  JEPS8072  Comandra umbellata subsp. californica G. Thomas Robbins, Lawrence R. Heckard 1953-6-1 3562 Fresno 4.8 mi se of Auberry (Bald Mountain); Bald Mountain 914 Comment
  SBBG78799  Comarostaphylis diversifolia subsp. planifolia R. C. and J. R. Robbins 1922-3-28 Santa Barbara Santa Rosa Island Comment
  SBBG71927  Condea emoryi R. C. and J. R. Robbins 1933-2-15 Riverside Tahquitz Cyn Comment
  JEPS25269  Conyza bonariensis G. Thomas Robbins 1959-8-30 4156 Alameda vacant lot at the corner of Excelsior Ct. and MacArthur Blvd. (just e of intersection of Lakeshore Ave.); Oakland 7 Comment
  UC746953  Corallorhiza maculata G. Thomas Robbins 1944-7-28 1766 El Dorado about 1/2 mi s Wrights Lake 2133 Comment
  UC746954  Corallorhiza striata G. Thomas Robbins 1943-6-5 1122 El Dorado slope above Silver Fork American River (near Sacramento Box Co. sawmill (China Flat), 3-4 mi s of Kyburz) 1371 Comment
  JEPS22063  Cordylanthus maritimus subsp. palustris G. Thomas Robbins with S. Galen Smith 1958-7-8 3894 Marin Salt marsh at nw edge of Schooner Bay ((an arm of Drakes Estero), Point Reyes Peninsula, about 300 yards sw of Sir Francis Drake Hwy); Point Reyes Pennisula Comment
  JEPS15713  Cordylanthus mollis subsp. hispidus G. Thomas Robbins with D. M. Post, J. W. Dawson, and P. H. Raven 1954-9-3 3651 Merced 1.7 mi s Ingomar (4.6 mi n of Volta, along Bustine-Volta Rd., fork of San Luis Creek) 27 Comment
  OBI9581  Cordylanthus mollis subsp. hispidus G. Thomas Robbins 1958-8-31 3931 Marin E. edge of Northwestern Pacific oailroad tracks at the Burdell siding. 0.5 mi E of US hwk 101 Comment
  JEPS23257  Cordylanthus mollis subsp. mollis G. Thomas Robbins 1958-8-31 3931 Marin tidal channel along e edge of Northwestern Pacific r.r. tracks Burdell siding (about 1/2 mi e of US Hwy 101) Comment
  JEPS24327  Cordylanthus pilosus subsp. hansenii G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4174 Tuolumne just e Italian Bar crossing (above South Fork of Stanislaus River); South Fork Stanislaus River 518 Comment
  UC907672  Cordylanthus tenuis subsp. tenuis G. Thomas Robbins 1943-8-21 1365 El Dorado 3 mi e Placerville; Eddy Arboretum, Institute of Forest Genetics 822 Comment
  JEPS8064  Coreopsis bigelovii G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3547 Tulare open flat above w shore of n fork of Kaweah River (3 mi n of Three Rivers) 297 Comment
  JEPS5585  Coreopsis calliopsidea G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3435 San Bernardino along US Highway 466 about halfway between Barstow and Kramer Comment
  JEPS22067 Image available Corethrogyne filaginifolia G. Thomas Robbins with S. Galen Smith 1958-7-8 3891 Marin along Bear Valley Road about 1 3/4 mi NW of Olema Comment
  JEPS25260  Corethrogyne filaginifolia G. Thomas Robbins with John Weiler 1959-8-8 4146 San Luis Obispo about 1 1/2 mi se Oso Flaco Lake 15 Comment
  OBI16670  Corethrogyne filaginifolia G. Thomas Robbins, S. Galen Smith 1958-7-8 3891 Marin Along Bear Valley Rd, 1-3/4 mi NW of Olema Comment
  SBBG60529  Corethrogyne filaginifolia R. C. and J. R. Robbins 1920-10-21 Santa Barbara Hot Springs Ave; Santa Barbara Comment
  CAS-BOT-BC211997  Cornus nuttallii G. Thomas Robbins 1943-4-24 1027 El Dorado Ca. 3 mi. e. of Camino 975 Comment
  CAS-BOT-BC212137  Cornus sericea G. Thomas Robbins 1944-6-11 1679 El Dorado Shore of South fork American River at Riverton 975 Comment
  UC747224  Cornus sericea subsp. sericea G. Thomas Robbins 1944-6-11 1679 El Dorado S. Fork American R. at Riverton; S. Fork American R. 975 Comment
  UC747225  Cornus sericea subsp. sericea G. Thomas Robbins 1944-7-28 1765 El Dorado ca. 1/2 mi. s. Wright's Lake (N. Fork of S. Fork Silver Creek); N. Fork of S. Fork Silver Creek 2133 Comment
  UC747223  Cornus sessilis G. Thomas Robbins 1943-3-28 974 El Dorado along Mace Rd. ca. 5 mi. n.e. Camino 914 Comment
  GH385585  Cornus stolonifera G. T. Robbins 1944-6-11 1679 Unknown shore of South Fork American River at Riverton 975 Comment
  JEPS22048  Coronopus didymus G. Thomas Robbins 1958-6-22 3879 Alameda between the bay and Oakport Road (at e edge of San Leandro Bay, Oakland, Oakport Rd. paralleling the Eastshore Freeway); San Leandro Bay, Oakland Comment
  SD165340  Cortaderia selloana Jolynn Robbins, Joe Barth 2004-8-2 26 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC746855  Corylus californica G. Thomas Robbins 1943-6-20 1196 El Dorado 4-5 mi NW of Pollock Pines (along road to powerhouse); South Fork American River 914 Comment
  JEPS15561  Crepis monticola G. Thomas Robbins with L. R. Heckard 1956-7-25 3719 Colusa Snow Mt. West; summit, Lake-Colusa Co. boundary 2145 Comment
  CAS-BOT-BC376538  Crepis monticola G. Thomas Robbins; L. R. Heckard 1956-7-25 3719 Unknown On summit of Snow Mt. West, Lake - Colusa County boundary 2145 Comment
  CAS-BOT-BC290916  Crepis vesicaria G. Thomas Robbins 1958-4-23 3820 Alameda On south side of Clarewood Drive, about .25 mile above its junction with Broadway Terrace, Oakland 106 Comment
  CAS-BOT-BC290917  Crepis vesicaria G. Thomas Robbins 1956-5-14 3692 Alameda Vacant lot along Liggett Drive, just east of Piedmont, Oakland Comment
  CAS-BOT-BC290919  Crepis vesicaria G. Thomas Robbins 1958-4-23 3820 Alameda On south side of Clarewood Drive, about .25 mile above its junction with Broadway Terrace, Oakland 106 Comment
  OBI16622  Crepis vesicaria subsp. taraxacifolia G. Thomas Robbins 1958-4-23 3820 Alameda S side of Clarewood Dr, about .25 mi above its jctn with Broadway Terr, Oakland 107 Comment
  UCD130986  Crepis vesicaria subsp. taraxacifolia G. Thomas Robbins 1958-4-23 3820 Alameda south side of Clarewood Drive, about 0.25 mile above its junction with Broadway Terrace, Oakland. 106 Comment
  JEPS25010  Cressa truxillensis G. Thomas Robbins 1958-9-1 3936 Alameda just n. East Creek Slough (at n.e. edge of San Leandro Bay, along Oakport Rd. (which parallels Eastshore Freeway on the s.), Oakland); Oakland, San Leandro Bay Comment
  SD185657  Croton setiger Jolynn Robbins 2006-9-4 53 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  JEPS25271  Crypsis schoenoides G. Thomas Robbins 1959-9-6 4158 Alameda Alameda Creek; creek bed at the Valle Vista Bridge on west Alquire Road, 1.6 mi sw of Mission Blvd. (State Hwy 9) Comment
  JEPS25262  Cryptantha clevelandii G. Thomas Robbins with John Weiler 1959-8-8 4149 San Luis Obispo about 1.5 mi se Oso Flaco Lake 15 Comment
  UC907717  Cryptantha flaccida G. Thomas Robbins 1945-6-23 2012 El Dorado about 3 mi e Camino; North Fork Webber Creek 975 Comment
  UC907689  Cryptantha intermedia G. Thomas Robbins 1945-6-23 2009 El Dorado 3 mi e Camino (slope above North Fork Webber Creek) 975 Comment
  UC907716  Cryptantha intermedia G. Thomas Robbins 1945-6-3 1967 El Dorado 1.5 mi ne Pollock Pines 1158 Comment
  RSA77976  Cryptantha intermedia G. Thomas Robbins 1945-6-23 2009 El Dorado North Fork Webber Creek, about 3 miles east of Camino. 976 Comment
  UC981781  Cryptantha micrantha G. Thomas Robbins 1950-4-2 3306 b Kern near and s of Freeman Junction (plain along U.S. Highway 6, w Mohave Desert); Mohave Desert 1005 Comment
  UC747563  Cryptantha simulans G. Thomas Robbins 1943-6-17 1184 El Dorado about 3 mi e Camino (along U.S. Highway 50) 1036 Comment
  UC907714  Cryptantha simulans G. Thomas Robbins 1944-6-3 1645 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline) 1036 Comment
  UC747646  Cryptogramma acrostichoides G. Thomas Robbins 1943-7-25 1293 El Dorado above small lake on slopes e and above Medley Lake (Reservoir); Desolation Valley Wilderness Area 2590 Comment
  UC964822  Cryptogramma acrostichoides G. Thomas Robbins 1943-7-25 1293 El Dorado small lake on slopes e and above Medley Lakes (Reservoir); Desolation Valley Wilderness Area 2590 Comment
  UC964852  Cryptogramma acrostichoides G. Thomas Robbins 1943-6-27 1219 El Dorado ridge above Echo Summit Pass (3/4 mi sw of US Hwy 50) 2438 Comment
  UCD126287  Cuscuta denticulata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  POM196055  Cuscuta indecora L. F. Robbins 1926-6-9 s.n. Sacramento Near Sacramento, California. Comment
  SD187861  Cuscuta subinclusa Jolynn Robbins 2004-8-23 33 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  JEPS15571  Cycladenia humilis var. humilis G. Thomas Robbins with L. R. Heckard 1956-7-25 3711 Colusa s. flank of Snow Mt. East (at lower edge of cirque between Snow Mt. West and Snow Mt. East, slope above Dark Hollow Creek (tributary of Middle Fork Stony Creek)) 1981 Comment
  OBI9022  Cyclospermum leptophyllum G. Thomas Robbins 1959-8-30 4152 Alameda At corner of Excelsior Ct and MacArthur Blvd (just E of intersection of Lakeshore Ave) Oakland 8 Comment
  RSA152179  Cyclospermum leptophyllum G. Thomas Robbins 1959-8-30 4152 Alameda Vacant lot at corner of Excelsior Ct. and MacArther Blvd. (just east of intersection of Lakeshore Ave.) 8 Comment
  UC747592  Cynoglossum grande G. Thomas Robbins 1943-3-19 964 El Dorado 3 mi. e. Placerville (near Institute of Forest Genetics) 762 Comment
  SEINET202643  Cynoglossum occidentale G. T. Robbins, R Bacigalupi 1955-6-7 5266 Lake Timberline Camp at jct of Boardman Ridge and Hull Mtn 1737 Comment
  JEPS25284  Cyperus bipartitus G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4175 -A Tuolumne ca. 1/2 mi. upstream from Italian Bar crossing S. Fork Stanislaus R. 518 Comment
  SD165351  Cyperus eragrostis Jolynn Robbins, Joe Barth 2004-8-2 28 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC1057482  Cyperus eragrostis G. Thomas Robbins 1937-6-18 248 Sonoma Santa Rosa, Santa Rosa Creek Comment
  JEPS25285  Cyperus strigosus G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4175 -B Tuolumne S. Fork Stanislaus R. ca. 1/2 mi. upstream from Italian Bar crossing; S. Fork Stanislaus R. 518 Comment
  UC747648  Cystopteris fragilis G. Thomas Robbins 1944-6-7 1658 El Dorado ca. 3 mi e Camino (along N Fork Webber Creek) 914 Comment
  UC964820  Cystopteris fragilis G. Thomas Robbins 1944-6-7 1658 El Dorado ca. 3 mi e Camino (along N Fork Webber Creek) 914 Comment
  CAS-BOT-BC68006  Cystopteris fragilis G. Thomas Robbins 1945-6-9 1975 El Dorado Wooded canyon slope above North Fork Webber Creek, ca. 3 mi. e. of Camino. 975 Comment
  UCD105694  Dalea mollis W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD105698  Dalea mollissima W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  RSA353641  Damasonium californicum L. F. Robbins 1928-5-18 s.n. Yolo The Causeway. Comment
  UC907663  Danthonia californica G. Thomas Robbins with J. T. Howell 1945-5-9 1893 Marin 1/2 mi n Hamilton Field Air Base Comment
  UCD60521  Danthonia californica G. Thomas Robbins 1958-5-10 3828 Alameda Along Redwood Road, about 1/2 mile E and above its junction with Mountain Boulevard, Oakland hills. 167 Comment
  UC907650  Danthonia californica var. americana G. Thomas Robbins with J. T. Howell 1945-5-9 1900 Marin along US Hwy 101 near Hamilton Field Air Base Comment
  UC747344  Darmera peltata G. Thomas Robbins 1943-5-23 1085 El Dorado North Fork Webber Creek, 3 mi E of Camino. 914 Comment
  JEPS16141  Deinandra increscens subsp. increscens G. Thomas Robbins with John Weiler 1959-8-7 4139 San Luis Obispo 1.8 mi n Arroyo de la Cruz (w of State Highway 1, 5.6 mi s of Monterey County line) Comment
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Sep 10 2011
  CAS-BOT-BC299988  Deinandra kelloggii G. Thomas Robbins; Lawrence R. Heckard 1953-5-30 3538 Tulare On road to Balch Park about one-fourth mile east of Milo junction and 7.5 miles north of Springville 609 Comment
  SBBG71754  Delphinium depauperatum J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  RSA32371  Delphinium glaucum G. Thomas Robbins 1943-9-5 1390 El Dorado Del Dorado County: below Dicks Pass, near Dicks Peak, along Tahoe Yosemite trail. alt 9000ft 2744 Comment
  UC747442  Delphinium gracilentum G. Thomas Robbins 1943-5-8 1077 El Dorado along US Hwy 50 3 mi e Camino 1036 Comment
  UC747447  Delphinium gracilentum G. Thomas Robbins 1944-4-23 1566 El Dorado along Chute Camp Rd near Iowa Creek (about 1/2 mi s of South Fork American River) 762 Comment
  JEPS5062  Delphinium gypsophilum subsp. gypsophilum G. T. Robbins and R. Bacigalupi 1952-4-20 3444 Kern Rolling hills, 3.3 miles SW of Taft, along US No. 399 Comment
  JEPS8287  Delphinium hansenii G. Thomas Robbins and Lawrence L. Heckard 1953-6-1 3567 Fresno 2.5 mi se Auberry (wooded slope); Bald Mountain 786 Comment
  CAS-BOT-BC8744  Delphinium hansenii G. T. Robbins 1943-6-8 1140 El Dorado at western edge of Institute of Forest Genetics, 3 mi. E of Placerville 731 Comment
  UC747415  Delphinium hansenii subsp. hansenii G. Thomas Robbins 1943-6-8 1140 El Dorado western edge of Institute of Forest Genetics, 3 mi E of Placerville 731 Comment
  UC747444  Delphinium nudicaule G. Thomas Robbins 1944-4-14 1522 Marin n slope of ridge about 3 mi w Hamilton Field Air Base; Big Rock Ridge 60 Comment
  UC747412  Delphinium nuttallianum G. Thomas Robbins 1945-7-1 2034 El Dorado rock slopes along Twin Lakes trail ca 3/4 mi ne Wrights Lake (9 mi n of US Hwy 50) 2194 Comment
  UC747417  Delphinium nuttallianum G. Thomas Robbins 1943-7-25 1314 El Dorado North of Upper Echo Lake, along Desolation Valley Trail 2286 Comment
  RSA32303  Delphinium patens G. Thomas Robbins 1944-4-23 1566 El Dorado Live oak woodland along Chute Camp Road near Iowa Creek, 1/2 mile S of S Fork American River Comment
  RSA32304  Delphinium patens G. Thomas Robbins 1944-5-12 1595 El Dorado 3 miles E of Placerville. 762 Comment
  RSA32305  Delphinium patens G. Thomas Robbins 1945-7-1 2034 El Dorado Along Twin Lakes trail 3/4 miles NE of Wrights Lake, 9 mile N of Hwy 50, alt 7200ft. El Dorado County 2195 Comment
  UC747421  Delphinium patens G. Thomas Robbins 1944-5-12 1595 El Dorado wooded hillside w Institute of Forest Genetics (about 3 mi e of Placerville) 762 Comment
  JEPS5060  Delphinium recurvatum G. T. Robbins and R. Bacigalupi 1952-4-16 3420 Kern Tupman; w edge of town Comment
  JEPS5064  Delphinium recurvatum G. T. Robbins and Rimo Bacigalupi 1952-4-19 3440 Kern along US Hwy 466 10 mi w Kramer Comment
  UC907670  Delphinium variegatum subsp. variegatum G. Thomas Robbins 1944-5-22 1626 El Dorado slopes along Hwy 50 2 1/2 mi e Placerville 762 Comment
  UC907626  Deschampsia danthonioides G. Thomas Robbins 1945-6-17 2000 El Dorado 5 mi. s. Pollock Pines (Sly Park meadow) 1005 Comment
  UC907627  Deschampsia danthonioides G. Thomas Robbins 1944-7-6 1752 El Dorado 5 mi. s. Pollock Pines (Sly Park meadow) 1005 Comment
  UCD114793  Descurainia sophia Robbins; Raynor 1943-6-1 s.n. Modoc near Likely. Comment
  JEPS8070  Dicentra chrysantha G. Thomas Robbins and Lawrence R. Heckard 1953-5-31 3556 Tulare 0.6 mi sw Badger (along State Highway 65) 914 Comment
  UC747399  Dicentra formosa G. Thomas Robbins 1943-4-25 1031 El Dorado ca 3 mi e Camino (along bank of North Fork of Webber Creek); North Fork of Webber Creek 914 Comment
  CAS-BOT-BC402364  Dicentra formosa subsp. formosa G. Thomas Robbins 1943-4-25 1031 El Dorado Along bank of North Fork Webber Creek, ca. 3 mi. e. of Camino 914 Comment
  UC1084355  Dichelostemma capitatum G. Thomas Robbins 1937-3-25 13 Sonoma 8-10 mi e Santa Rosa; Santa Rosa Creek Canyon Comment
  UC747537  Dichelostemma multiflorum G. Thomas Robbins 1943-6-10 1158 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline) 1036 Comment
  SBBG57644  Dichelostemma volubile J. R. and R. C. Robbins 1932-6-8 Tulare Sequoia Nat Park Comment
  UC747509  Dichelostemma volubile G. Thomas Robbins 1943-5-24 1087 El Dorado 3 mi e Placerville (at Institute of Forest Genetics) 822 Comment
  CAS-BOT-BC503129  Dichelostemma volubile G. Thomas Robbins 1943-5-24 1087 El Dorado Dry, grassy hillside in pine plantation at Institute of Forest Genetics, 3 mi. e. of Placerville. 822 Comment
  SBBG60672  Dieteria canescens J. R. and R. C. Robbins 1932-7-17 Tuolumne Tioga Pass Rd 2438 Comment
  CAS-BOT-BC153766  Diplacus angustatus G. Thomas Robbins 1945-6-17 2003 El Dorado Sly Park Meadow 975 Comment
  CAS-BOT-BC150280  Diplacus aurantiacus G. Thomas Robbins 1945-5-20 1936 El Dorado Above Sweetwater Creek, 3-4 mi. s. of Salmon Falls 182 Comment
  SBBG66793  Diplacus aurantiacus J. R. and R. C. Robbins 1932-8-29 San Luis Obispo near Cambria Comment
  CAS-BOT-BC152248  Diplacus bolanderi G. Thomas Robbins; Lawrence R. Heckard 1953-5-30 3544 Tulare Along road to Balch Park, about one-fourth mile east of Milo junction and 7.5 miles north of Springville 548 Comment
  CAS-BOT-BC152249  Diplacus bolanderi G. Thomas Robbins; Lawrence R. Heckard 1953-5-30 3544 Tulare Along road to Balch Park, about one-fourth mile east of Milo junction and 7.5 miles north of Springville 548 Comment
  SEINET195149  Diplacus kelloggii G. Thomas Robbins 1945-1 1839 El Dorado Above Smithflat, 2.5 mi E of Placerville 762 Comment
  SBBG66709  Diplacus leptaleus J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  CAS-BOT-BC153667  Diplacus mephiticus G. Thomas Robbins 1944-6-18 1732 El Dorado Along Capps Crossing Road 1/2 mi. n. of Capps Crossing 1524 Comment
  CAS-BOT-BC151616  Diplacus torreyi G. Thomas Robbins 1943-7-6 1249 El Dorado C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  SEINET195640  Diplacus torreyi G. Thomas Robbins 1945-1 2060 El Dorado Along St Hwy 89 near Fallen Leaf Lake 1920 Comment
  UC747014  Disporum hookeri G. Thomas Robbins 1944-4-14 1519 Marin about 3 mi w of Hamilton Field Air Base (on n slope of Big Rock Ridge); Big Rock Ridge 91 Comment
  UC747536  Disporum hookeri G. Thomas Robbins 1943-6-4 1114 El Dorado 2-3 mi s of Kyburz (above Silver Fork American River near Sacramento Box Sawmill (China Flat)) 1371 Comment
  UCD142315  Ditaxis serrata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  SBBG72431  Dithyrea californica R. C. and J. R. Robbins 1933-2-17 Riverside 20 mi S of Indio Comment
  UCD114730  Dithyrea californica W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  CAS-BOT-BC136244  Dodecatheon alpinum G. Thomas Robbins 1943-6-27 1229 El Dorado Wet, grassy meadow along U.S. Highway 50 just e. of Echo Summit Pass 2225 Comment
  SEINET195489 Image available Dodecatheon clevelandii var. patulum G. Thomas Robbins 1945-4-22 1866 El Dorado 1-2 miles W of Placerville, near Hangtown Creek. 579 Comment
  UC747622  Dodecatheon hendersonii G. Thomas Robbins 1943-4-10 985 El Dorado 3 mi e Camino; canyon slope North Fork Webber Creek, e of Camino 975 Comment
  SBBG58462  Dodecatheon jeffreyi J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  JEPS14472  Downingia cuspidata G. Thomas Robbins with Peter H. Raven 1956-4-28 3669 Sacramento about 2 mi w El Dorado County line (along U.S. Highway 50, foothills of the Sierra Nevada); Sierra Nevada 60 Comment
  UC907742  Draba oligosperma var. oligosperma G. Thomas Robbins 1945-8-12 2125 El Dorado near summit Freel Peak; near summit Freel Peak 3322 Comment
  UC698012  Draperia systyla G. Thomas Robbins 1943-6-20 1201 El Dorado 4-5 mi W Pollock Pines (north-facing canyon wall of South Fork American River); South Fork American River 914 Comment
  UC700285  Draperia systyla G. Thomas Robbins 1945-6-17 1997 El Dorado Camp Creek near Baltic Peak 975 Comment
  CAS-BOT-BC401530  Drosera rotundifolia G. Thomas Robbins 1945-8-6 2100 El Dorado In Long Meadow near Schlien Ranger Station 1676 Comment
  SEINET6425015 Image available Drosera rotundifolia G. Thomas Robbins 1945-1 2100 El Dorado Long Meadow near Schlien Ranger Station 1676 Comment
  UC747404  Drosera rotundifolia G. Thomas Robbins 1945-8-6 2100 El Dorado near Schlien Ranger Station; Long Meadow 1676 Comment
  SBBG72483  Drymocallis hansenii J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  UC907625  Drymocallis lactea G. Thomas Robbins 1943-7-25 1308 El Dorado above Tamarack Lake (along trail to Desolation Valley); above Tamarack Lake, along trail to Desolation Valley 2286 Comment
  UC747402  Dudleya cymosa G. Thomas Robbins 1944-5-28 1640 El Dorado 1 to 2 mi confluence of Long Creek and South Fork American River (above Long Creek) Comment
  CAS-BOT-BC428081  Dudleya cymosa subsp. cymosa G. Thomas Robbins 1945-6-17 1984 El Dorado Above Camp Creek, near Baltic Peak 1036 Comment
  JEPS25137  Dudleya farinosa G. Thomas Robbins 1959-5-16 4007 Contra Costa just s Pt. San Pablo (Potrero Hills); Richmond Comment
  SD51677  Dudleya farinosa G. Thomas Robbins 1959-5-16 4007 Contra Costa Rocky hillside just south of Pt. San Pablo, Potrero Hills, Richmond. Comment
  UCD98785  Dysphania chilensis W. W. Robbins; Mr. Norton 1930-9-30 s.n. Sacramento Sacramento. Comment
  UC907664  Eleocharis bella G. Thomas Robbins 1944-7-6 1758 El Dorado 5 mi S of Pollock Pines (Sly Park) 975 Comment
  CAS-BOT-BC113564  Eleocharis bolanderi Guy Thomas Robbins 1945-6-23 2004 El Dorado Canyon slope above North Fork Webber Creek ca. 3 mi E of Camino. 975 Comment
  UC907704  Eleocharis bolanderi G. Thomas Robbins 1945-6-23 2004 El Dorado 3 mi E of Camino (canyon slope above North Fork Webber Creek) 975 Comment
  UC1100709  Eleocharis pachycarpa G. Thomas Robbins and S. Galen Smith 1949-10-23 1898 El Dorado 5 mi N of Coloma (on Georgetown road) Comment
  JEPS7980  Eleocharis quinqueflora G. Thomas Robbins, Peter H. Raven 1954-7-21 3625 Tulare Crabtree Creek,upper reaches Sequoia National Park 3200 Comment
  UC907632  Elymus glaucus G. Thomas Robbins 1944-6-15 1693 El Dorado 3 mi e Camino; C.C.C. Camp Snowline 1036 Comment
  UC907636  Elymus glaucus G. Thomas Robbins 1943-6-10 1148 El Dorado slope above North Fork Webber Creek (about 3 mi e of Camino) 975 Comment
  SEINET210031  Elymus multisetus G. T. Robbins 1944-6-16 1697 El Dorado Institute of Forest Genetics 3 miles east of Placerville 823 Comment
  UC907657  Elymus multisetus G. Thomas Robbins 1944-6-16 1697 El Dorado 3 mi e Placerville (pine plantation); Institute of Forest Genetics 822 Comment
  UCD119219  Emmenanthe penduliflora W. W. Robbins 1930-12-24 s.n. San Diego S.E. part of county. Desert. Comment
  SBBG60960  Encelia farinosa R. C. and J. R. Robbins 1933-2-15 Riverside foot of Palms to Pines Hwy, ca. 11 mi SW of Palm Springs Comment
  CAS-BOT-BC409898  Enemion occidentale G. Thomas Robbins 1944-3-19 1486 El Dorado South Fork American River canyon, 5-6 mi. N of Camino 762 Comment
  JEPS25011  Epilobium brachycarpum G. Thomas Robbins 1958-9-1 3937 Alameda vacant lot at w end of street Berkeley, Hopkins Street Comment
  OBI12057  Epilobium brachycarpum G. Thomas Robbins 1958-9-1 3937 Alameda Vacant lot a W end of Hopkins St, Berkley Comment
  UCD105396  Epilobium brachycarpum G. Thomas Robbins 1958-9-1 3937 Alameda West end of Hopkins Street, Berkeley. 167 Comment
  JEPS25006  Epilobium canum subsp. canum G. Thomas Robbins 1958-9-1 3932 Alameda on slope above Tunnel Road (w of Charing Cross Rd.); Oakland Hills 243 Comment
  SBBG60119  Epilobium canum subsp. canum J. R. and R. C. Robbins 1932-8-19 San Luis Obispo near Cambria Comment
  SEINET195498  Epilobium canum subsp. latifolium G. Thomas Robbins 1943-8-15 1361 El Dorado Along roadside to Wrights Lake 2-3 mi N of US Hwy. 50 1981 Comment
  UC747281  Epilobium canum subsp. latifolium G. Thomas Robbins 1943-8-15 1361 El Dorado 2-3 mi n U.S. Highway 50 (along roadside to Wrights Lake) 1981 Comment
  JEPS25076  Epilobium cleistogamum G. Thomas Robbins with S. Galen Smith 1959-1-4 3958 Solano field just n U.S. Highway 40 (about 1/2 mi e of Winters road junction, about 2 1/2 mi ne of Vacaville); Sacramento Valley 27 Comment
  UC747232  Epilobium densiflorum G. Thomas Robbins 1943-7-15 1268 El Dorado canyon slope above North Fork Webber Creek (about 3 mi e of Camino) 975 Comment
  UC747235  Epilobium densiflorum G. Thomas Robbins 1944-7-6 1750 El Dorado 5 mi s Pollock Pines; Sly Park 1005 Comment
  UC747274  Epilobium densiflorum G. Thomas Robbins 1944-8-15 1828 El Dorado along US Hwy 50 3 mi e Placerville (bed of small stream from spring) 670 Comment
  UC747270  Epilobium foliosum G. Thomas Robbins 1945-6-17 1988 El Dorado slope above Camp Creek (near Baltic Peak) 975 Comment
  UC747277  Epilobium torreyi G. Thomas Robbins 1944-6-9 1667 El Dorado 3 mi e Placerville (near Institute of Forest Genetics) 792 Comment
  UC964832  Epipactis gigantea G. Thomas Robbins 1950-5-14 3355 Monterey along State Hwy 1 between Lucia and Big Sur (about 5 mi s of Hunter Light) 152 Comment
  UC747642  Equisetum hyemale subsp. affine G. Thomas Robbins 1944-6-17 1698 El Dorado ca. 1 mi e Pyramid Ranger Station 1676 Comment
  UCD135440  Equisetum hyemale subsp. affine W. W. Robbins 1928-4-29 943 Unknown American River. Comment
  UC1084510  Equisetum laevigatum G. Thomas Robbins 1937-6-18 249 Sonoma along R.R. right-of-way Santa Rosa Comment
  UCD62959  Eragrostis cilianensis W. W. Robbins 1943-8-1 Yolo Lowe Ranch north of Woodland. Comment
  UCD63822  Eragrostis mexicana subsp. virescens W. W. Robbins; Gramineae 1943-8-1 s.n. Yolo Lowe Ranch N. of Woodland. Comment
  JEPS7472  Eremalche parryi G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3445 Kern 1.3 mi. w. of junction with U.S. Hwy. 399 on rd. to Elkhorn Plain; watershed of Bitterwater Creek 426 Comment
  RSA152174  Eremalche parryi G. Thomas Robbins, R. C. Bacigalupi 1952-4-20 3445 Kern Slopes of Hills in watershed of Bitterwater Creek on road to Elkhorn Plain, 1.3 miles west of junction with U.S. Highway 399 427 Comment
  UC747310  Eremocarpus setiger G. Thomas Robbins 1943-7-15 1266 El Dorado flat above North Fork Webber Creek (about 3 mi e of Camino) 975 Comment
  CAS-BOT-BC512632  Eriastrum abramsii Lynn Robbins 1953-6-14 s.n. Santa Clara Monte Bello Ridge, in roadway to mansion about 1/4 mi from house Comment
  A387302  Ericameria bloomeri G. T. Robbins 1945-10-7 2153 Unknown SE slope of Harvey Mt., 2-3 mi. NE of Burgess Spring, Harvey Valley (T.33N., R.9E), Lassen National Forest 1828 Comment
  GH387301  Ericameria bloomeri G. T. Robbins 1945-10-7 2153 Unknown SE slope of Harvey Mt., 2-3 mi. NE of Burgess Spring, Harvey Valley (T.33N., R.9E), Lassen National Forest 1828 Comment
  SEINET195638  Ericameria bloomeri G. Thomas Robbins 1945-8-12 2145 El Dorado Along road to High Meadow 6-8 miles southeast of Lake Tahoe 2134 Comment
  CAS-BOT-BC286824  Ericameria discoidea G. Thomas Robbins 1943-9-5 1378 El Dorado Summit of Mt. Tallac 2956 Comment
  JEPS16381  Ericameria ericoides G. Thomas Robbins 1956-12-30 3800 Monterey near Marina; Monterey Bay, Marina Beach Comment
  JEPS15687  Ericameria suffruticosa G. Thomas Robbins 1956-9-10 3770 Alpine along trail to Round Top and Elephants Back between Woods Lake and Winnemucca Lake (about 2 mi airline s of Carson Pass) 2621 Comment
  CAS-BOT-BC294543  Erigeron breweri var. breweri G. Thomas Robbins 1943-7-25 1327 El Dorado Ca. 1/2 mi. s. of Echo Lake 2194 Comment
  UC747160  Erigeron breweri var. breweri G. Thomas Robbins 1943-7-25 1327 El Dorado alongside road ca. 0.5 mi s of Echo Lake 2194 Comment
  CAS-BOT-BC300646  Erigeron foliosus var. hartwegii G. Thomas Robbins 1945-5-20 1937 El Dorado Above Sweetwater Creek 182 Comment
  UC747189  Erigeron glacialis var. glacialis G. Thomas Robbins 1944-7-29 1800 El Dorado on ridge s of and above Lake Schmidell; Desolation Valley Wilderness Area 2590 Comment
  SBBG63287  Erigeron philadelphicus J. R. and R. C. Robbins 1932-7-18 El Dorado W shore, Lake Tahoe Comment
  SBBG63320  Erigeron philadelphicus J. R. and R. C. Robbins 1932-7-24 Humboldt S of Scotia Comment
  UC907759  Erigeron philadelphicus var. philadelphicus G. Thomas Robbins 1945-5-20 1922 El Dorado 3 mi e Rescue (Placerville-Rescue road); Dry Creek 457 Comment
  UCD132042  Erigeron philadelphicus var. philadelphicus Robbins; Raynor 1943-6-1 s.n. Plumas Belden. Comment
  CAS-BOT-BC224232  Eriodictyon californicum G. Thomas Robbins 1943-5-5 1070 El Dorado At western edge of Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC747589  Eriodictyon californicum G. Thomas Robbins 1943-5-5 1070 El Dorado at western edge Institute of Forest Genetics (3 mi e of Placerville); western edge of Institute of Forest Genetics 762 Comment
  SBBG65102  Eriodictyon lobbii J. R. and R. C. Robbins 1932-7-18 El Dorado W side, Lake Tahoe Comment
  SD165152  Eriogonum fasciculatum var. foliolosum Jolynn Robbins 2004-7-5 19 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UCD100275  Eriogonum inflatum W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC1084471  Eriogonum latifolium G. Thomas Robbins 1937-6-6 236 Sonoma along roadside near Bodega Bay Comment
  CAS-BOT-BC270985  Eriogonum nervulosum G. Thomas Robbins; L. R. Heckard 1956-7-25 3723 Lake Southern extension of Snow Mt. West and about one-fourth mile south of its summit 2103 Comment
  UC746888  Eriogonum nudum var. deductum G. Thomas Robbins 1945-8-5 2091 El Dorado slope above n shore of Rockbound Lake; Desolation Wilderness Area, Rockbound Valley 2011 Comment
  UCD100553  Eriogonum nudum var. oblongifolium Robbins; Raynor 1943-6-1 s.n. Plumas Near Quincy. Comment
  UC746876  Eriogonum roseum G. Thomas Robbins 1944-9-24 1831 El Dorado ca. 3 mi e Camino (on canyon side above North Fork Webber Creek); North Fork Webber Creek 975 Comment
  UC746890  Eriogonum spergulinum var. reddingianum G. Thomas Robbins 1945-7-8 2043 El Dorado near Al Tahoe; Lake Tahoe 1920 Comment
  GH364584  Eriogonum umbellatum var. nevadense G. T. Robbins 1945-7-8 2046 Unknown near Al Tahoe, Lake Tahoe 1920 Comment
  UC746875  Eriogonum umbellatum var. nevadense G. Thomas Robbins 1945-7-8 2046 El Dorado near Al Tahoe; Lake Tahoe 1920 Comment
  UC746897  Eriogonum umbellatum var. nevadense G. Thomas Robbins 1943-7-25 1298 El Dorado near Le Conte Lake (above e shore of Medley Lakes (reservoir)); Desolation Valley Wilderness Area 2438 Comment
  CAS-BOT-BC261813  Eriogonum wrightii var. subscaposum G. Thomas Robbins 1956-9-9 3761 Alpine Lower, southerly slopes of Red Lake Peak, above State Highway 88, 1/2 to 3/4 of a mile due west of Carson Pass 2682 Comment
  JEPS15696  Eriogonum wrightii var. subscaposum G. Thomas Robbins 1956-9-9 3761 Alpine 1/2 to 3/4 mi due w, above State Highway 88, lower slopes of Red Lake Peak Carson Pass; Red Lake Peak 2651 Comment
  RSA32379  Eriogonum wrightii var. subscaposum G. Thomas Robbins 1945-8-12 2143 El Dorado Forming caespitose cushions. Jeffrey Pine White Fir woods along roas to Hight Meadow, 6-8 mi. SE. of Lake Tahoe. 2134 Comment
  UC746892  Eriogonum wrightii var. subscaposum G. Thomas Robbins 1945-8-12 2143 El Dorado 6-8 mi se Lake Tahoe (along road to High Meadow) 2133 Comment
  UC972350  Eriophorum crinigerum G. Thomas Robbins 1951-7-26 3394 Fresno meadow at edge of Laurel Creek (w. of Second Recess and Mono Creek); Laurel Creek basin 3108 Comment
  SEINET9157589  Eriophorum crinigerum G. T. Robbins 1951-7-26 3394 Fresno laurel Creek, Laurel Creek basin, west of Second Recess and Mono Creek 3719 Comment
  SD185506  Eriophyllum confertiflorum var. confertiflorum Jolynn Robbins 2006-4-9 43 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  CAS-BOT-BC301323  Eriophyllum lanatum var. croceum G. Thomas Robbins 1943-6-17 1186 El Dorado Along U. S. Highway 50, about 3 mi. e. of Camino 1036 Comment
  UC747194  Eriophyllum lanatum var. croceum G. Thomas Robbins 1943-6-17 1186 El Dorado 3 mi e Camino (along U.S. Highway 50) 1036 Comment
  GH427016  Eriophyllum lanatum var. grandiflorum G. T. Robbins 1943-5-24 1086 Unknown Institute of Forest Genetics, 3 miles east of Placerville 822 Comment
  JEPS15700  Eriophyllum lanatum var. integrifolium G. Thomas Robbins 1956-9-9 3756 Alpine lower, s slopes of Red Lake Peak (above State Highway 88, 0.5 to 0.75 mi due west of Carson Pass) 2651 Comment
  UC747297  Erodium cicutarium G. Thomas Robbins 1944-5-21 1624 El Dorado 2 mi e Camino (along U.S. Highway 50) 975 Comment
  UCD136713  Eryngium oblanceolatum Robbins; Norton Date Unknown 826 Yolo West of Davis. Comment
  GH379364  Erysimum capitatum G. T. Robbins 1945-7-8 203 B Unknown near Al Tahoe, Lake Tahoe 1920 Comment
  UC747369  Erysimum capitatum G. Thomas Robbins 1943-6-4 1116 El Dorado slope above Silver Fork American River (near Sacramento Box. Co. Sawmill (China Flat), 3-4 mi s of Kyburz) 1371 Comment
  CAS-BOT-BC41533  Erysimum capitatum G. Thomas Robbins 1943-6-4 1116 El Dorado On slope above Silver Fork American River near Sacramento Box Company sawmill. (China Flat) 3-4 miles south of Kyburz. 1371 Comment
  RSA32403  Erysimum capitatum var. perenne G. Thomas Robbins 1943-7-25 1285 El Dorado Above Lake Le Conte E of Medley Lakes, Desolation Valley Wilderness Area. 2591 Comment
  UC747407  Erysimum perenne G. Thomas Robbins 1945-7-8 2038 El Dorado near Al Tahoe; Lake Tahoe 1920 Comment
  UC907688  Erysimum perenne G. Thomas Robbins 1945-8-12 2122 El Dorado rocky slopes near summit; Freel Peak 3322 Comment
  SEINET195477 Image available Erythranthe lewisii G. Thomas Robbins 1943-1 1325 El Dorado Above south shore of Echo Lake. 2195 Comment
  SEINET195632 Image available Erythranthe lewisii G. Thomas Robbins 1945-1 2133 El Dorado Outlet of streamlet of Star Lake; along trail to Freel Peak. 2804 Comment
  UC747525  Erythronium multiscapideum G. Thomas Robbins 1945-5-22 1865 El Dorado 1-2 mi w Placerville (near Hangtown Creek) 579 Comment
  UCD139645  Erythronium multiscapideum W. W. Robbins 1926-4-17 541 Lassen Grass Valley. Comment
  RSA32297  Eschscholzia caespitosa subsp. caespitosa G. Thomas Robbins 1944-4-23 1559 El Dorado Along Chute Camp Road above Iowa Creek, ca. 4 miles NW of Camino 762 Comment
  CAS-BOT-BC403000  Eschscholzia californica G. Thomas Robbins 1944-5-21 1625 El Dorado Along U. S. Highway 50, about 2 mi. e. of Camino 975 Comment
  SBBG70136  Eschscholzia californica J. R. and R. C. Robbins 1930-3-28 Kern Kern Valley Comment
  CAS-BOT-BC419455  Eschscholzia lobbii G. Thomas Robbins 1945-4-22 1853 El Dorado About 2 1/2 mi. e. of Shingle Springs 457 Comment
  POM183203  Eschscholzia lobbii L. F. Robbins 1927-3-10 s.n. Sacramento Del Paso Comment
  CAS-BOT-BC312046  Eucephalus breweri G. Thomas Robbins 1943-8-15 1352 El Dorado Along trail to Grouse Lake ca. 2 mi. ne. of Wrights Lake 2438 Comment
  UC747177  Eucephalus breweri G. Thomas Robbins 1943-8-15 1352 El Dorado 2 mi ne, along trail to Grouse Lake Wright's Lake 2438 Comment
  SD165223  Euphorbia polycarpa Jolynn Robbins 2004-7-5 20 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UCD142730  Euphorbia polycarpa W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD142858  Euphorbia setiloba W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747307  Euphorbia spathulata G. Thomas Robbins 1944-5-22 1630 El Dorado 2-3 mi e Placerville (along U.S. Hwy 50) 609 Comment
  UC907788  Eurybia integrifolia G. Thomas Robbins 1945-8-4 2078 El Dorado near Onion Flat; Desolation Valley Wilderness Area, Rockbound Valley 2133 Comment
  OBI15449  Euthamia occidentalis G. Thomas Robbins 1958-9-1 3935 Alameda Along and near the mouth of Cordonices Crk, Albany-Berkeley city boundary Comment
  UCD107164  Fagonia laevis W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747004  Fragaria vesca G. Thomas Robbins 1944-5-16 1609 El Dorado about 3 mi e Camino (along bank of North Fork Webber Creek); North Fork Webber Creek 914 Comment
  CAS-BOT-BC437048  Fragaria vesca subsp. bracteata G. Thomas Robbins 1944-5-16 1609 El Dorado North Fork Webber Creek about 3 miles east of Camino 914 Comment
  SBBG72484  Fragaria virginiana J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  UCD112555  Frangula californica Robbins; Raynor 1943-6-1 s.n. Plumas near Belden, Feather River Canyon. Comment
  GH378160  Frangula rubra subsp. obtusissima G. T. Robbins 1945-8-5 2082 Unknown along north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
  CAS-BOT-BC55748  Frangula rubra subsp. rubra G. Thomas Robbins 1943-6-6 1133 El Dorado along Mace Road, 3-4 mi. ne. of Camino 914 Comment
  JEPS25153  Frankenia salina G. Thomas Robbins with John Weiler 1959-5-23 4023 Contra Costa nw extension Brooks Island (on breakwater (partly natural, partly man-made)); San Francisco Bay, Richmond Comment
  SBBG72753  Frankenia salina R. C. and J. R. Robbins 1920-10-31 Santa Barbara Carpinteria Comment
  UC747573  Fraxinus latifolia G. Thomas Robbins 1945-5-20 1938 El Dorado 3-4 mi s Salmon Falls (along Sweetwater Creek); Sweetwater Creek 182 Comment
  UC1057446  Fritillaria liliacea G. Thomas Robbins 1937-4-11 88 San Mateo near Spring Valley Lakes (on road to Woodside) Comment
  UC747535  Fritillaria micrantha G. Thomas Robbins 1943-4-13 991 El Dorado above Smith Flat (at w edge of Institute of Forest Genetics); Institute of Forest Genetics 792 Comment
  GH385635  Galium aparine G. T. Robbins 1944-6-3 1647 Unknown C.C.C. Camp Snowline, three miles east of Camino 1036 Comment
  JEPS15231  Galium grayanum var. nanum G. Thomas Robbins with L. R. Heckard 1956-7-25 3720 Colusa summit Snow Mt. West (Lake-Colusa Co. boundary) 2145 Comment
  UC747059  Galium parisiense G. Thomas Robbins 1944-6-9 1664 El Dorado ridge near Institute of Forest Genetics (about 3 mi e of Placerville) 792 Comment
  GH417025  Galium parisiense G. T. Robbins 1944-6-9 1664 Unknown near Institute of Forest Genetics 792 Comment
  JEPS19406  Galium porrigens var. porrigens G. Thomas Robbins 1940-3-24 306 Sonoma about 6 mi e Santa Rosa (Calistoga Rd); Rincon Grade 167 Comment
  JEPS19407  Galium porrigens var. porrigens G. Thomas Robbins 1937-4-17 116 Contra Costa near Point Richmond Comment
  JEPS7843  Galium stellatum var. eremicum G. T. Robbins with R. Bacigalupi, George Gillett, Lincoln Constance, L. R. Heckard 1952-5-1 3501 Inyo Titus Canyon Death Valley National Monument, Grapevine Mtns. (toward base of e-facing cliffside) 1371 Comment
  UC747237  Garrya congdonii G. Thomas Robbins 1945-5-20 1927 El Dorado near Simpsons Ranch (above bank of Sweetwater Creek) 182 Comment
  UC747229  Garrya elliptica G. Thomas Robbins with J. T. Howell 1944-4-13 1498 Marin about 4 mi w Hamilton Field Air Base (on Big Rock Ridge); Big Rock Ridge 396 Comment
  GH401761  Garrya flavescens subsp. congdonii G. T. Robbins 1945-5-20 1927 Unknown above bank of Sweetwater Creek near Simpsons Ranch (T. 10N., R. 8E., Sec. 13) 182 Comment
  CAS-BOT-BC192119  Garrya fremontii G. Thomas Robbins 1944-3-19 1488 El Dorado South-facing slope of South Fork American River canyon. 5-6 mi. n. of Camino 762 Comment
  UC747230  Garrya fremontii G. Thomas Robbins 1944-3-19 1488 El Dorado 5-6 mi n Camino (South Fork American River canyon) 762 Comment
  UC907630  Gastridium ventricosum G. Thomas Robbins 1945-6-1 1965 El Dorado 3 mi e Placerville (Institute of Forest Genetics, Eddy Arboretum); Institute of Forest Genetics, Eddy Arboretum 822 Comment
  UC747234  Gayophytum eriospermum G. Thomas Robbins 1943-7-18 1274 El Dorado along Pleasant Valley road 5 mi s Pollock Pines; Sly Park meadow 1005 Comment
  UC747628  Gentiana calycosa G. Thomas Robbins 1943-9-5 1392 El Dorado wet grassy meadow n and below Dicks Pass; Tahoe-Yosemite trail 2743 Comment
  RSA32385  Gentiana calycosa G. Thomas Robbins 1943-9-5 1392 El Dorado North and below Dicks Pass, Tahoe-Yosemite trail. 2744 Comment
  RSA98558  Gentiana sceptrum G. Thomas Robbins 1938-6-23 268 Sonoma On Pitkin Ranch, Vine Hill region, ca. ten miles west of Santa Rosa. Comment
  SBBG60586  Geraea canescens R. C. and J. R. Robbins 1933-2-15 Riverside near foot of Palms to Pines Hwy, ca. 11 mi SW of Palm Springs Comment
  UCD132592  Geraea canescens W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC907674  Geranium dissectum G. Thomas Robbins 1945-4-22 1854 El Dorado 2.5 mi e Shingle Springs 457 Comment
  UC1057453  Geranium dissectum G. Thomas Robbins 1937-4-25 142 Contra Costa e of La Vista Comment
  UCSB3542  Geranium dissectum Robbins, G. 1937-5-16 Alameda Berkeley Hills Comment
  UC747296  Geranium richardsonii G. Thomas Robbins 1943-7-25 1336 El Dorado near Echo Lake Road (along U.S. Highway 50) 2194 Comment
  UC747302  Geranium richardsonii G. Thomas Robbins 1944-6-17 1705 El Dorado ca 1 mi e Pyramid Ranger Station 1676 Comment
  UC747303  Geranium richardsonii G. Thomas Robbins 1945-8-6 2107 El Dorado near Schlien Ranger Station; Long Meadow 1676 Comment
  UC746976  Geum macrophyllum G. Thomas Robbins 1944-6-17 1704 El Dorado 1 mi e of Pyramid Ranger Station 1676 Comment
  RSA46767  Geum macrophyllum G. Thomas Robbins 1944-6-17 1704 El Dorado Along small stream in open pine woods, 1 ile E of Pyramid Ranger Station. 1677 Comment
  UC964825  Gilia achilleifolia subsp. achilleifolia G. Thomas Robbins 1950-4-23 3341 Santa Clara 2.5-3 mi ne Coyote (foothills of Mount Hamilton Range); Mount Hamilton Range 365 Comment
  SD45390  Gilia cana subsp. speciosa G. Thomas Robbins 1950-4-2 3309 Kern Red Rock Canyon near The Temple, ca. 1.0 mile south of Ricardo. 762 Comment
  UC964827  Gilia cana subsp. speciosa G. Thomas Robbins 1950-4-2 3309 Kern about 1 mi s Ricardo (Red Rock Canyon near The Temple); Red Rock Canyon near The Temple, s of Ricardo 762 Comment
  UC964830  Gilia capitata subsp. abrotanifolia G. Thomas Robbins 1950-4-2 3297 Kern about 1 mi n and e Isabella (above Kern River); , n and e of Isabella 762 Comment
  RSA84901  Gilia capitata subsp. mediomontana G. Thomas Robbins 1943-5-25 1089 El Dorado El Dorado County: Institute of Forest Genetics, 3 miles E of Placerville. 823 Comment
  UCSB5023  Gilia clivorum Robbins, G. 1937-4-4 Alameda Berkeley Hills Comment
  JEPS7460  Gilia latiflora subsp. davyi G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3438 San Bernardino Desert flats 5 mi e Kramer; Mohave Desert, e of Kramer 731 Comment
  JEPS8026  Gilia latifolia G. Thomas Robbins with L. Constance and G. W. Gillett 1952-4-27 3470 San Bernardino s base Mt. Pisgah Crater (about 2 mi s of U.S. Highway 66, Mohave Desert); Mohave Desert, s base of Mt. Pisgah Crater Comment
  JEPS7464  Gilia minor G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3442 Kern on road to Kramer five mi e Mojave (Mohave Desert); , e of Mojave on road to Kramer 792 Comment
  SD45391  Gilia sinuata G. Thomas Robbins 1950-4-7 3326 Inyo Dry wash near pictured rocks, ca. 0.5 mile north and east of Little Lake. 914 Comment
  UC964826  Gilia sinuata G. Thomas Robbins 1950-4-7 3326 Inyo about 0.5 mi n and e Little Lake; n and e of Little Lake 914 Comment
  JEPS7799  Gilia stellata G. Thomas Robbins 1952-4-29 3474 San Bernardino on first ridge n Mitchell Ranch (Mitchell's Caverns, e Mohave Desert); eastern Mohave Desert, Providence Mountains Comment
  JEPS7448  Gilia subacaulis G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3429 San Bernardino along U.S. Highway 91 about 5 mi e Cronese ((Cronese Valley), Mohave Desert); Mohave Desert, e of Cronese (Cronese Valley) 457 Comment
  RSA114107  Gilia tricolor G. Thomas Robbins 1944-4-24 1568 El Dorado SW of Institute of Forest Genetics, 3 miles east of Placerville 762 Comment
  UC747608  Gilia tricolor subsp. diffusa G. Thomas Robbins 1944-4-24 1568 El Dorado about 3 mi e Placerville (on rocky ridge sw of Institute of Forest Genetics); e of Placerville, sw of Institute of Forest Genetics 762 Comment
  CAS-BOT-BC266565  Githopsis pulchella G. Thomas Robbins 1944-5-21 1622 El Dorado Above N Fork Webber Creek near Eight Mile House, about 2 miles E of Camino 914 Comment
  SEINET8733897 Image available Githopsis pulchella G. Thomas Robbins 1945-1 1930 El Dorado above Sweetwater Creek near Simpsons Ranch (T. 10N., R. 8E., Sec. 13), 4-5 miles south of Salmon Falls 183 Comment
  UC747028  Githopsis pulchella subsp. pulchella G. Thomas Robbins 1943-6-5 1128 El Dorado about 3 mi e Camino (slopes above North Fork Webber Creek) 1036 Comment
  UC747047  Githopsis pulchella subsp. pulchella G. Thomas Robbins 1944-5-12 1597 El Dorado about 3 mi e Placerville (w of Institute of Forest Genetics) 762 Comment
  UC747046  Githopsis specularioides G. Thomas Robbins 1943-4-18 1011 Sacramento about 15 mi ne Sacramento; Carmichael District Comment
  SEINET10464601  Githopsis specularioides Robbins 1943-4-18 ROBBINS 1011 Sacramento Carmichael district, about 15 miles northeast of Sacramento Comment
  SEINET8733896 Image available Githopsis specularioides G. Thomas Robbins 1944-1 1622 El Dorado above North Fork Webber Creek near Eight Mile House, about two miles east of Camino 914 Comment
  JEPS21988  Glebionis segetum G. Thomas Robbins 1958-4-27 3822 Alameda Berkeley Aquatic Park Berkeley (above e shore) 1 Comment
  SEINET3821487  Glebionis segetum G. Thomas Robbins 1958-4-27 3822 Alameda In low, grassy sites among willows above the eastern shore of Berkeley Aquatic Park, Berkeley 2 Comment
  UCD132392  Glebionis segetum G. Thomas Robbins 1958-4-27 3822 Alameda above the eastern shore of Berkeley Aquatic Park, Berkeley. 1 Comment
  JEPS8283  Gnaphalium palustre G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3573 Madera at margins of vernal pool in open woodland 1.9 mi s of Raymond 213 Comment
  UC746952  Goodyera oblongifolia G. Thomas Robbins 1945-9-1 2147 El Dorado about 2 mi e of Camino 975 Comment
  JEPS14533  Gratiola ebracteata G. Thomas Robbins with Peter H. Raven 1956-4-28 3670 Sacramento along U.S. Highway 50 about 2 mi w El Dorado County line; rolling foothills of Sierra Nevada 60 Comment
  UC747058  Gratiola ebracteata G. Thomas Robbins 1945-5-27 1961 El Dorado about 1/2 mi n Pleasant Valley; n of Pleasant Valley 762 Comment
  UCD81558  Grindelia camporum W. W. Robbins; W. D. Norton 1927-10-1 s.n. Yolo West of Davis. Comment
  OBI19342  Grindelia camporum G. Thomas Robbins 1959-7-24 4113 Alameda Vacant lot just N of the intersection of Harrison and 9th Sts, just S of Codornices Crk, Berkley 11 Comment
  JEPS19011  Grindelia hirsutula G. Thomas Robbins 1957-9-15 3805 Alameda on roadside berm along Broadway about one-half mi w Lake Temescal; Oakland 60 Comment
  JEPS22045  Grindelia hirsutula G. Thomas Robbins 1958-6-25 3882 Marin about 1 mi n of Rodeo Lagoon; Fort Cronkhite Military Reservation 167 Comment
  JEPS22053  Grindelia hirsutula G. Thomas Robbins 1958-6-22 3876 Alameda just n of junction with Skyline blvd. (along Joaquin Miller Road); Oakland Comment
  JEPS25012  Grindelia hirsutula G. Thomas Robbins 1958-9-20 3938 Alameda about 0.5 e Toll Plaza (San Francisco-Oakland Bay Bridge, along the shore of San Francisco Bay); San Francisco Bay Comment
  JEPS25080  Grindelia hirsutula G. Thomas Robbins 1958-10-25 3955 Alameda along US Hwy 50 (Foothill Blvd.) about 1/2 mi s Estudillo Ave. junction; San Leandro Comment
  JEPS25135  Grindelia hirsutula G. Thomas Robbins 1959-4-26 4003 Contra Costa s of Castro Point (just n of Richmond-San Rafael Bridge, above shore of San Francisco Bay, dry slopes of Potrero Hills); Potrero Hills, Richmond Comment
  JEPS8227  Grindelia hirsutula G. Thomas Robbins with D. M. Post, J. W. Dawson, and P. H. Raven 1954-9-3 3647 Stanislaus plains along Vernalis-Modesto road (Maze Road) 1.8 mi e bridge crossing San Joaquin River (5.4 mi e of Vernalis) 7 Comment
  JEPS89200  Grindelia hirsutula G. Thomas Robbins 1958-10-2 3941 Contra Costa borders of tidal slough along Southern Pacific R.R. just w Carlson Blvd. (near Stege railroad siding); Richmond Comment
  OBI16367  Grindelia hirsutula G. Thomas Robbins 1958-6-25 3882 Marin Fort Cronkite Military Reservation ,about 1 mi N of Rodeo Lagoon 168 Comment
  UC1599360  Grindelia hirsutula G. Thomas Robbins 1958-10-4 3945 Alameda beach at edge San Francisco Bay (near w end of Williams St.); San Leandro Comment
  UC747157  Grindelia hirsutula G. Thomas Robbins with J. T. Howell 1945-5-9 1901 Marin near Hamilton Field Air Base 0 Comment
  UC747196  Grindelia hirsutula G. Thomas Robbins 1943-7-10 1259 El Dorado 3 mi e of Placerville (in grassy places in Eddy Arboretum at Institute of Forest Genetics); Eddy Arboretum 822 Comment
  SEINET3139220  Grindelia hirsutula G. Thomas Robbins 1958-9-20 3938 Alameda Along the shorte of San Francisco Bay, about 1/2 mi. E of the Toll Plaza, San Francisco-Oakland Bay Bridge, Oakland Comment
  SEINET195483  Grindelia hirsutula var. davyi G. T. Robbins 1943-7-10 1259 El Dorado Eddy Arboretum at Institute of Forest Genetics 3 miles E of Placerville 823 Comment
  SEINET195657  Grindelia hirsutula var. hirsutula G. T. Robbins, JT Howell 1945-5-9 1901 Marin Hamilton Field Air Base Comment
  OBI16401  Grindelia stricta var. angustifolia G. Thomas Robbins 1958-9-20 3938 Alameda San Francisco bay, about 1/2 mi E of the Toll Plaza, San Francisco-Oakland Bay bridge, Oakland Comment
  UCD132568  Grindelia stricta var. angustifolia G. Thomas Robbins 1959-7-24 4113 Alameda vacant lot just north of the intersection of Harrison and 9th Streets, just south of Codornices Creek, Berkeley. 10 Comment
  RSA152121  Grindelia stricta var. platyphylla G. Thomas Robbins 1955-6-4 3657 Marin NW of Rodeo Lagoon. Comment
  UC1057468  Guillenia lasiophylla G. Thomas Robbins 1940-3-16 277 Alameda about 1 mi w Corral Hollow (along road to Tracy) 381 Comment
  UC1084429  Guillenia lasiophylla G. Thomas Robbins 1940-3-16 280 Alameda near Alameda-San Joaquin County line; Corral Hollow 259 Comment
  SD165289  Gutierrezia californica Jolynn Robbins 2004-7-5 16 San Diego Damon Lane County Park in south El Cajon. South on Jamacha, right on Fury. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC747572  Hackelia micrantha G. Thomas Robbins 1944-7-28 1788 El Dorado 1/4 mi w of Rockbound Pass (along Willow Flat Trail); Desolation Valley Wilderness Area 2438 Comment
  UC907690  Hackelia micrantha G. Thomas Robbins 1945-7-8 2052 El Dorado above Eagle Lake (along Velma Lakes Trail); Desolation Valley Wilderness Area 2438 Comment
  JEPS7984  Hackelia sharsmithii G. Thomas Robbins, Peter H. Raven 1954-7-19 3620 Inyo s shore of Consultation Lake; Lone Pine Canyon 3590 Comment
  UC747562  Hackelia velutina G. Thomas Robbins 1943-7-25 1330 El Dorado about 1 mi s of Echo Lake (along roadside) 2194 Comment
  RSA32386  Hackelia velutina G. Thomas Robbins 1943-7-25 1330 El Dorado Shady Red Fir woods along roadside about 1 mi. S of Echo Lake 2195 Comment
  SD185517  Hazardia squarrosa var. grindelioides Jolynn Robbins 2004-8-23 32 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  CAS-BOT-BC302437  Hazardia whitneyi var. discoidea G. Thomas Robbins; L. R. Heckard 1956-7-25 3728 Unknown On ridge forming southern extension of Snow Mt. West and about one-fourth mile south of its summit, Lake - Colusa County Boundary 2103 Comment
  CAS-BOT-BC306565  Helenium bigelovii G. Thomas Robbins 1945-8-6 2108 El Dorado In Long Meadow near Schlien Ranger Station 1676 Comment
  JEPS22068  Helenium puberulum G. Thomas Robbins 1958-7-19 3901 Contra Costa about one-half mi e Point San Pablo (meadow overlooking Pt. San Pablo); Richmond Comment
  JEPS25146  Helianthella californica subsp. californica G. Thomas Robbins 1959-5-16 4016 Sonoma Spring Mtn. Road between Calistoga Road and Sonoma-Napa County line; Mayacamas Mts. 304 Comment
  UC747149  Helianthella californica subsp. nevadensis G. Thomas Robbins 1943-4-28 1042 El Dorado 3 mi s Placerville (grassy places in Eddy Arboretum, Institute or Forest Genetics) 822 Comment
  SD135123  Helianthus gracilentus Marya Robbins 1992-5-5 San Diego Camp Pendleton, Yankee 2 training area. Level bottom of valley between San Mateo and Jardine Canyons Comment
  UC1084508  Heliotropium curassavicum G. Thomas Robbins 1940-5-19 330 Contra Costa roadside between Antioch and Rio Vista Rio Vista Comment
  UC747588  Heliotropium curassavicum G. Thomas Robbins with J. T. Howell 1945-5-9 1892 Marin 1/2 mi. n. Igancio (on R.R. tracks) Comment
  JEPS22105  Heliotropium curassavicum G. Thomas Robbins 1958-7-26 3915 Alameda just s.e. Berkeley Aquatic Park (and just e. of KRE radio transmission station, bed of Southern Pacific R.R. tracks); Berkeley Comment
  SD185542  Helminthotheca echioides Jolynn Robbins 2006-9-4 59 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC907609  Hemizonella minima G. Thomas Robbins 1944-4-30 1573 El Dorado 3 to 4 mi ne Newtown (nw and above South Fork of Webber Creek) 762 Comment
  CAS-BOT-BC310044  Hemizonella minima G. Thomas Robbins 1943-6-13 1161 El Dorado Along Park Creek road, w. of its junction with the Plum Creek and Hazel Valley roads 1219 Comment
  UC747163  Hemizonella minima G. Thomas Robbins 1943-6-13 1161 El Dorado w of junction with the Plum Creek and Hazel Valley roads (along Park Creek road) 1219 Comment
  UC907780  Hemizonia congesta subsp. congesta G. Thomas Robbins with J. T. Howell 1945-5-9 1898 Marin 1/2 mi n Hamilton Field Air Base Comment
  SBBG61009  Hemizonia congesta subsp. luzulifolia R. C. Robbins, J. R. Robbins 1932-8-29 San Luis Obispo between Cayucos and San Simeon Comment
  UCD133008  Hemizonia congesta subsp. luzulifolia Robbins; Norton 1927-10-1 828 Unknown County Unknown: Exact location unknown. Comment
  RSA152183  Hemizonia kelloggii G. Thomas Robbins, L. R. Heckard 1953-5-30 3538 Tulare On road to Balch Park, about 0.25 mile E of Milo junction and 7.5 miles N of Springville. 610 Comment
  UC1084378  Heracleum lanatum G. Thomas Robbins 1937-4-11 75 San Mateo along Skyline Blvd. s. of San Francisco Comment
  UC747314  Hesperolinon micranthum G. Thomas Robbins 1943-6-22 1210 El Dorado 3 mi e Placerville (near Institute of Forest Genetics) 762 Comment
  UC1057467  Heterodraba unilateralis G. Thomas Robbins 1940-3-16 276 Alameda about 1 mi w of Corral Hollow (along road to Tracy) 381 Comment
  CAS-BOT-BC143602  Heteromeles arbutifolia G. Thomas Robbins 1943-6-29 1236 El Dorado At Institute of Forest Genetics, 3 mi. e. of Placerville 822 Comment
  SD165137  Heteromeles arbutifolia Jolynn Robbins 2004-7-5 14 San Diego Damon Lane County Park in south El Cajon. South on Jamacha, right on Fury. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC746970  Heteromeles arbutifolia G. Thomas Robbins 1943-6-29 1236 El Dorado 3 mi e Placerville (Institute of Forest Genetics) 822 Comment
  JEPS22046  Heterotheca sessiliflora subsp. bolanderi G. Thomas Robbins 1958-6-25 3881 Marin about 1 mi n Rodeo Lagoon; Fort Cronkhite Military Reservation 167 Comment
  JEPS16139  Heterotheca sessiliflora subsp. echioides G. Thomas Robbins with John Dawson and Bob Ornduff 1956-10-6 3791 Monterey along roadside between Jamesburg and Tassajara Hot Springs near entrance to U.S. Forest Service China Camp Ground; Santa Lucia Range 1310 Comment
  SBBG78097  Heuchera maxima R. C. and J. R. Robbins 1921-3-28 Santa Barbara Santa Cruz Island Comment
  SEINET195476  Heuchera micrantha G. T. Robbins 1945-6-17 1980 El Dorado Along Camp Creek near Baltic Peak 975 Comment
  SJSU5778  Heuchera micrantha J. A. Robbins 1970-5-17 100 Santa Clara Sanborn Rd, 1 mi S of intersection with Big Basin Way c. 4 mi SW of Saratoga Comment
  CAS-BOT-BC420465  Heuchera micrantha var. erubescens G. Thomas Robbins 1945-7-16 2067 El Dorado N Fork Webber Creek, 3 mi. E of Camino 914 Comment
  RSA0062969  Heuchera micrantha var. erubescens G. Thomas Robbins 1945-6-17 1980 El Dorado Along Camp Creek, near Baltic Peak. 976 Comment
  RSA0066223  Heuchera rubescens var. alpicola G. Thomas Robbins 1945-7-8 2057 El Dorado Along Velma Lakes trail near Eagle Creek. 1-2 miles W of Emerald Bay. 2134 Comment
  UC747339  Heuchera rubescens var. glandulosa G. Thomas Robbins 1945-7-8 2057 El Dorado 1-2 mi w Emerald Bay (along Velma Lakes trail near Eagle Creek) 2133 Comment
  UCD116341  Hibiscus denudatus W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747136  Hieracium horridum G. Thomas Robbins 1943-9-5 1385 El Dorado rocky ridge just w Dicks Pass (along trail to summit of Dicks Peak) 2895 Comment
  RSA32384  Hieracium horridum G. Thomas Robbins 1943-9-5 1385 El Dorado Rocky ridge just west of Dicks Pass along trail to summit of Dicks Peak. 2896 Comment
  UC907787  Hieracium triste G. Thomas Robbins 1945-8-4 2077 El Dorado Highland lake; Desolation Valley Wilderness Area 2438 Comment
  JEPS22107  Hoita macrostachya G. Thomas Robbins with H. G. Baker, G. Newcomb, and R. Ornduff 1958-7-30 3917 Tuolumne 1.5 mi sw Italian Bar (near Mountain Lily Mine, along edge of Fivemile Creek (a tributary of South Fork Stanislaus River)); Fivemile Creek 472 Comment
  CAS-BOT-BC324560  Holocarpha macradenia G. Thomas Robbins 1959-10-11 4168 Santa Cruz Along E. Lake Ave (State Highway 152) about 1 mile southwest of its junction with the Hecker Pass Road just south of Santa Cruz Co. Fairgrounds 35 Comment
  CAS-BOT-BC324595  Holocarpha macradenia G. Thomas Robbins 1959-10-11 4168 Santa Cruz Along E. Lake Ave. (State Highway 152), about 1 mile southwest of its junciton with the Hecker Pass Road, just south of the Santa Cruz Co. Fairgrounds 35 Comment
  JEPS24289  Holocarpha macradenia G. Thomas Robbins 1959-10-11 4168 Santa Cruz 1 mi sw of its junction with the Hecker Pass Road; E. Lake Ave (State Highway 152). S. of Fairgrounds 35 Comment
  JEPS24290  Holocarpha macradenia G. Thomas Robbins 1959-10-11 4168 Santa Cruz 1 mi sw of its junction with the Hecker Pass Road; E. Lake Ave (State Highway 152). S. of Fairgrounds 35 Comment
  RSA151923  Holocarpha macradenia G. Thomas Robbins 1959-10-11 4168 Santa Cruz Along E. Lake ave. (State Hwy 152), about 1 mile southwest of its jct. with the Hecker Pass Rd. just south of the Santa Cruz Co. Fairgrounds 35 Comment
  JEPS15709  Holocarpha virgata subsp. virgata G. Thomas Robbins 1956-9-7 3745 El Dorado 4 mi w Shingle Springs (along U.S. Highway 50) 350 Comment
  JEPS24325  Holozonia filipes G. Thomas Robbins with Robt. Ornduff and Howard Whisler 1959-10-25 4170 San Joaquin 3.5 mi e Farmington (0.5 mi w of Stanislaus Co. line, along State Highway 4, in the first low, rolling foothills of the Sierra Nevada); Sierra Nevada, Duck Creek 42 Comment
  JEPS22055  Hordeum brachyantherum subsp. brachyantherum G. Thomas Robbins 1958-3-20 3874 Alameda at corner of 4th St. and Dwight Way (Berkeley); Berkeley Comment
  UC907619  Horkelia fusca subsp. parviflora G. Thomas Robbins 1945-8-5 2094 El Dorado ca 1/2 mi s Rubicon Springs 1828 Comment
  RSA32358  Horkelia fusca subsp. parviflora G. Thomas Robbins 1943-8-15 1357 El Dorado Lodgepole pine woods near Wrights Lake. 2287 Comment
  CAS-BOT-BC532478  Horkelia fusca var. parviflora G. Thomas Robbins 1945-8-5 2094 El Dorado Grassy meadow at edge of Lodgepole pine woods, about 1/2 mile S of Rubicon Springs 1828 Comment
  SEINET3256452 Image available Horkelia fusca var. parviflora G. Thomas Robbins 1945-8-5 2094 El Dorado Woods about 1/2 mi. s. of Rubicon Springs. 1830 Comment
  GH345644  Horkelia parryi G. T. Robbins 1945-5-27 1951 Unknown along Camino-Pleasant Valley road, ca. 1 1/2 mi. n. of Pleasant Valley 762 Comment
  UC907620  Horkelia parryi G. Thomas Robbins 1945-5-27 1951 El Dorado ca 1.5 mi n Pleasant Valley (along Camino-Pleasant Valley Rd) 762 Comment
  RSA32402  Horkelia tridentata G. Thomas Robbins 1943-4-25 1036 El Dorado Open Ponderosa pine woods on grounds of CCC Camp Snowline, 3 miles E of Camino. 1037 Comment
  UC481568  Horkelia tridentata subsp. tridentata L. F. Robbins 1928-6-29 El Dorado above Placerville Comment
  UC747267  Horkelia tridentata subsp. tridentata G. Thomas Robbins 1943-4-25 1036 El Dorado 3 mi e Camino (C. C. C. Camp Snowline grounds) 1036 Comment
  UC747003  Horkelia tridentata subsp. tridentata G. T. Robbins 1943-3-28 975 El Dorado 5 mi ne Camino (along Mace Rd) 914 Comment
  SBBG67355  Hosackia gracilis J. R. and R. C. Robbins 1932-7-23 Del Norte 1 mi NE of Crescent City Comment
  CAS-BOT-BC315831  Hulsea algida G. Thomas Robbins 1945-8-12 2116 El Dorado Western face of Freel Peak near summit 3322 Comment
  UC907729  Hulsea algida G. Thomas Robbins 1945-8-12 2116 El Dorado w face Freel Peak (near summit) 3322 Comment
  UC698013  Hydrophyllum occidentale G. Thomas Robbins 1943-6-4 1115 El Dorado ca 4 mi s Kyburz (slope above Silver Fork American River at China Flat); China Flat 1371 Comment
  UC700283  Hydrophyllum occidentale G. Thomas Robbins 1943-5-23 1080 El Dorado 3 mi e Camino (woods along North Fork Webber Creek); North Fork Webber Creek 914 Comment
  SBBG72723  Hypericum formosum var. scouleri J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  UC746948  Hypericum perforatum G. Thomas Robbins 1943-6-16 1176 El Dorado 3 mi. e Placerville (near Institute of Forest Genetics) 762 Comment
  JEPS7961  Hypochaeris glabra G. Thomas Robbins 1953-5-8 3520 Calaveras about 1.5 mi n of Murphys; Mercer Cave 701 Comment
  UC747607  Ipomopsis aggregata G. Thomas Robbins 1943-7-25 1329 El Dorado ca 1/2 mi s Echo Lake 2194 Comment
  UCD118225  Ipomopsis aggregata G. Thomas Robbins 1948-8-8 3181 Tuolumne along State Highway 108, about 1 mile west of Sonora Pass. 2773 Comment
  UC1249640  Ipomopsis aggregata G. Thomas Robbins 1951-6-17 3388 Placer ca 1.5 mi s Homewood (along state hwy 89) Comment
  SBBG58354  Ipomopsis aggregata subsp. aggregata J. R. and R. C. Robbins 1932-7-17 Mono Tioga Pass Comment
  UC972336  Ipomopsis congesta G. Thomas Robbins 1945-8-12 2129 El Dorado Freel Peak 3322 Comment
  SD51760  Ipomopsis polycladon G. Thomas Robbins, L. Constance and G. W. Gillett 1952-4-27 3469 San Bernardino Near Hector Mines on Mt. Pisgah Crater lava flow, ca. 2.0 miles south of U. S. Highway 66. Comment
  JEPS15686  Ipomopsis tenuituba G. Thomas Robbins 1956-9-10 3772 Alpine ca 2 air mi s Carson Pass (above w shore of Winnemucca Lake, along trail to Elephants Back) 2743 Comment
  UC1249641  Ipomopsis tenuituba G. Thomas Robbins 1951-8-5 3408 Tuolumne ca 1.5 mi w Sonora Pass (above Deadman Creek) Comment
  UC1084479  Iris douglasiana G. Thomas Robbins 1938-4-15 252 Sonoma about 2.5 mi e Bodega Comment
  UC747021  Iris hartwegii G. Thomas Robbins 1943-5-2 1062 El Dorado ca 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC1057443  Iris longipetala G. Thomas Robbins 1937-4-11 82 San Mateo slopes above Spring Valley Lake (s of San Francisco) Comment
  SEINET6193236 Image available Iris macrosiphon L. F. Robbins 1927-1 s.n. Napa Napa county Comment
  SBBG62839  Isocoma menziesii var. vernonioides R. C. and J. R. Robbins 1920-10-23 Santa Barbara Carpinteria Comment
  JEPS14636  Isolepis cernua G. Thomas Robbins 1955-6-4 3659 Marin along s shore Rodeo Lagoon; s shore Rodeo Lagoon Comment
  JEPS25008  Isolepis cernua G. Thomas Robbins 1958-9-1 3934 Alameda at edge near mouth Cordonices Creek (just e of the Eastshore Freeway, Albany-Berkeley City boundary); Albany-Berkeley City boundary, nr mouth Cordonices Creek Comment
  CAS-BOT-BC112606  Isolepis cernua Guy Thomas Robbins 1958-9-1 3934 San Mateo At edge of Cordonices Creek near its mouth, just E of the Eastshore Freeway Comment
  RSA153448  Isolepis cernua G. Thomas Robbins 1958-9-1 3934 Alameda At edge of Cordonices Creek near its mouth, just east of the Eastshore Freeway, Albany-Berkeley City boundary. Comment
  UC747403  Isopyrum occidentale G. Thomas Robbins 1944-4-23 1552 El Dorado about 5 mi n Camino (above South Fork American River); above South Fork American River 762 Comment
  UC747413  Isopyrum occidentale G. Thomas Robbins 1944-3-19 1486 El Dorado 5-6 mi n Camino (slope of South Fork American River canyon); South Fork American River Canyon 762 Comment
  CAS-BOT-BC324732  Iva axillaris G. Thomas Robbins 1958-7-26 3914 Alameda Bed of Southern Pacific railroad tracks near teh corner of 64th Street and Overland Avenue, Emeryville Comment
  CAS-BOT-BC324756  Iva axillaris G. Thomas Robbins 1958-7-19 3909 Contra Costa Just south of Castro Point, San Francisco Bay, Richmond Comment
  JEPS22099  Iva axillaris subsp. robustior G. Thomas Robbins 1958-7-19 3909 Contra Costa at edge of rock quarry on hills above and just s Castro Pt.; San Francisco Bay, Richmond Comment
  JEPS22104  Iva axillaris subsp. robustior G. Thomas Robbins 1958-7-26 3914 Alameda near the corner of 64th St. and Overland Avenue (bed of Southern Pacific railroad tracks); Emeryville Comment
  CAS-BOT-BC139764  Ivesia gordonii G. Thomas Robbins 1944-7-28 1789 El Dorado At summit of Rockbound Pass, Desolation Valley Wilderness Area 2621 Comment
  UC747264  Ivesia gordonii G. Thomas Robbins 1944-7-28 1789 El Dorado Rockbound Pass summit; Desolation Valley Wilderness Area 2621 Comment
  SBBG72486  Ivesia lycopodioides var. megalopetala J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  CAS-BOT-BC142469  Ivesia santolinoides G. Thomas Robbins 1944-7-30 1820 El Dorado Along Willow Flat Trail, about 3 mi. NE of Wrights Lake, 9 mi. n. of U.S. Highway 50 2286 Comment
  UC746950  Ivesia santolinoides G. Thomas Robbins 1943-7-25 1323 El Dorado slope above e shore Echo Lake 2286 Comment
  UC747262  Ivesia santolinoides G. Thomas Robbins 1944-7-30 1820 El Dorado about 3 mi ne of Wrights Lake (9 mi n of U.S. Highway 50, along Willow Flat Trail); Willow Flat Trail 2286 Comment
  JEPS15532  Jaumea carnosa G. Thomas Robbins 1956-8-18 3738 San Mateo mouth of Pomponio Creek (at Pacific Ocean) Comment
  OBI15978  Jaumea carnosa G. Thomas Robbins 1959-7-18 4111 Marin Along W shore of Tomales Bay, 1/2 mi S of Inverness Comment
  CAS-BOT-BC340271  Jensia rammii G. Thomas Robbins 1943-4-30 1056 El Dorado Near Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC747130  Jensia rammii G. Thomas Robbins 1943-4-30 1056 El Dorado near Institute of Forest Genetics (3 mi e of Placerville) 762 Comment
  CAS-BOT-BC340269  Jensia rammii G. Thomas Robbins 1943-4-15 997 El Dorado Above North Fork Webber Creek, about 3 mi. e. of Camino 975 Comment
  SD165193  Juglans nigra Jolynn Robbins 2004-7-5 18 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC1057463  Juncus bufonius G. Thomas Robbins 1937-5-23 195 Sonoma about 10 mi w Santa Rosa (on Pitkin Ranch, Vine Hill region) Comment
  UC747501  Juncus chlorocephalus G. Thomas Robbins 1944-7-30 1827 El Dorado ca 1.5 mi ne Wright Lake (along Twin Lakes trail) 2438 Comment
  JEPS15540  Juncus covillei var. obtusatus G. Thomas Robbins with L. R. Heckard 1956-7-25 3698 Colusa se extension Snow Mt. West (at e base of ridge that forms extension, about 0.5 air mi from its summit, Lake-Colusa County boundary) 1889 Comment
  UC907721  Juncus effusus subsp. pacificus G. Thomas Robbins 1945-7-16 2069 El Dorado 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747508  Juncus ensifolius G. Thomas Robbins 1944-7-6 1753 El Dorado 5 mi s Pollock Pines 975 Comment
  JEPS30774  Juncus lescurii G. Thomas Robbins 1950-5-13 3345 San Luis Obispo se of Oso Flaco Lake Comment
  SEINET6185846  Juncus lescurii G. T. Robbins 1950-5-13 3345 San Luis Obispo Sand dunes southeast of Oso Flaco Lake Comment
  CAS-BOT-BC81104  Juniperus communis G. Thomas Robbins 1944-7-29 1811 El Dorado east and below Lake Leland, Desolation Valley Wilderness Area 2438 Comment
  GH362734  Kalmia microphylla G. T. Robbins 1945-7-1 2026 Unknown Wet meadow along trail between Grouse Lake and Hemlock Lake, 2-3 miles east of Wrights Lake, nine miles north of U. S. Highway 50 2590 Comment
  CAS-BOT-BC59643  Kalmia microphylla subsp. microphylla G. Thomas Robbins 1945-7-1 2026 El Dorado Along trail between Grouse Lake and Hemlock Lake, 2-3 mi. e. of Wrights Lake, 9 mi. n. of US Highway 50. 2590 Comment
  UC747651  Kalmia polifolia subsp. microphylla G. Thomas Robbins 1944-7-28 1794 El Dorado above Lake Doris (just e of Rockbound Pass, Desolation Valley Wilderness Area); Desolation Valley Wilderness Area 2590 Comment
  CAS-BOT-BC236792  Keckiella breviflora G. Thomas Robbins 1943-5-28 1102 El Dorado At western edge of Institute of Foerst Genetics, 3 mi. e. of Placerville 762 Comment
  JEPS7779  Keckiella breviflora G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3543 Tulare 7.5 mi n Springville (on road to Balch Park, about 0.5 mi e of Milo junction) 609 Comment
  UC747469  Keckiella lemmonii G. Thomas Robbins 1945-8-5 2085 El Dorado n shore Rockbound Lake (Rockbound Valley); Desolation Valley Wilderness Area 2011 Comment
  SBBG69460  Kelloggia galioides J. R. and R. C. Robbins 1932-7-18 El Dorado W side, Lake Tahoe Comment
  UC747061  Kelloggia galioides G. Thomas Robbins 1943-6-17 1185 El Dorado ca 3 mi e Camino (along U.S. Highway 50) 1036 Comment
  JEPS23258  Kickxia elatine G. Thomas Robbins 1958-10-19 3954 Alameda n edge Russell City (and s edge of Hayward Municipal Airport) Comment
  OBI9473  Kickxia elatine G. Thomas Robbins 1958-6-14 3864 Alameda Along roadside near W end of Depot Rd, about 1/2 mi W of Mt. Eden Station 2 Comment
  UCD123889  Kickxia elatine G. Thomas Robbins 1958-10-19 3954 Alameda northern edge of Russell City and southern edge of Hayward Municipal Airport. Comment
  UCD123890  Kickxia elatine W. W. Robbins 1930-7-3 2161 Yolo University Farm. Comment
  JEPS24326  Kickxia spuria G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-25 4172 San Joaquin 3.5 mi e Farmington (banks and in stream bed of Duck Creek, along State Highway 4, 0.5 mi w of Stanislaus County line, in first low rolling foothills of the Sierra Nevada); Sierra Nevada, Duck Creek 42 Comment
  UCD107107  Krameria bicolor W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  CAS-BOT-BC340336  Kyhosia bolanderi G. Thomas Robbins 1945-8-6 2106 El Dorado In Long Meadow near Schlien [Schlein] Ranger Station 1676 Comment
  JEPS25242  Lactuca saligna G. Thomas Robbins 1959-8-2 4119 Alameda about 1.75 mi nw Mt. Eden (about 0.75 mi s of Russell, about 0.25 mi n of the w end of Depot Road, just e of American Salt Company, along the shore of San Francisco Bay); San Francisco Bay 1 Comment
  JEPS8057  Lagophylla ramosissima G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3539 Tulare 1/4 mi e of Milo junction and 7.5 mi n of Springville; Road to Balch Park 609 Comment
  UCD63304  Lamarckia aurea W. W. Robbins 1931-5-11 2202 Orange Santa Ana. Comment
  JEPS21995  Lamium amplexicaule G. Thomas Robbins 1958-4-19 3814 Alameda about .17 mi n, field along Depot Road, just e of Clawiter Road Mt. Eden Station 7 Comment
  UCD107213  Larrea tridentata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  CAS-BOT-BC337921  Lasthenia californica G. Thomas Robbins 1943-3-25 966 El Dorado Flat near Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  JEPS25123  Lasthenia californica subsp. californica G. Thomas Robbins 1959-4-18 3989 Contra Costa hillslopes above and about 1/2 mi e Pt. San Pablo; Richmond 30 Comment
  JEPS25099  Lasthenia conjugens G. Thomas Robbins 1959-3-29 3963 Alameda about 0.25 mi n of w end Depot Road (adjacent to (just e of) the American Salt Co., along shore of San Francisco Bay about, 1.75 mi nw of Mt. Eden and 0.75 mi s of Russell); San Francisco Bay 1 Comment
  JEPS14574  Lasthenia fremontii G. Thomas Robbins with Peter H. Raven 1956-4-28 3667 Sacramento near Sacramento airport; Freeport Blvd. Comment
  UC747192  Lasthenia gracilis G. Thomas Robbins 1943-3-25 966 El Dorado near Institute of Forest Genetics (3 mi e of Placerville) 762 Comment
  UC1084420  Lathyrus jepsonii var. californicus G. Thomas Robbins 1937-5-23 189 Sonoma near Wright School (between Santa Rosa and Sebastopol) Comment
  UC747300  Lathyrus nevadensis var. nevadensis G. Thomas Robbins 1943-5-4 1069 El Dorado 3 mi e Camino (along U.S. Highway 50 at C.C.C. Camp Snowline) 1036 Comment
  UC747294  Lathyrus sulphureus G. Thomas Robbins 1943-6-5 1130 El Dorado about 3 mi e Camino (slope above North Fork Webber Creek) 975 Comment
  UC1084401  Lathyrus vestitus var. vestitus G. Thomas Robbins 1937-4-17 120 Contra Costa near Pt. Richmond Comment
  JEPS7494  Layia glandulosa G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3456 San Luis Obispo just e of lowest point in Carrizo Plain (ca. 8 mi se of Soda Lake) 594 Comment
  JEPS25165  Layia platyglossa G. Thomas Robbins 1959-5-31 4037 Marin 1.5 mi s of turn-off to McClures Beach; Tomales Point 176 Comment
  SBBG79723  Layia platyglossa R. C. and J. R. Robbins -Mar-1921 Santa Barbara Santa Cruz Island Comment
  UC572646  Ledum glandulosum G. Thomas Robbins 1937-5-23 203 Sonoma Vine Hill Region, Pitkin Marsh Pitkin Marsh; Vine Hill Region, Pitkin Marsh Comment
  CAS-BOT-BC215726  Lepechinia calycina G. Thomas Robbins 1945-5-20 1940 El Dorado Hillslope above Sweetwater Creek, 2-3 miles s. of Salmon Falls 182 Comment
  UC747554  Lepechinia calycina G. Thomas Robbins 1945-5-20 1940 El Dorado above Sweetwater Creek, 2-3 miles S of Salmon Fallas 182 Comment
  OBI15131  Lepidium draba G. Thomas Robbins 1959-3-29 3965 Alameda Just N of Depot Rd at its W end, adj to the American Salt co evaporating ponds along the shore of San Francisco Bay, about 1.5 mi NW of Mt Eden and about 3/4 mi S of Russell 2 Comment
  UCD115439  Lepidium draba G. Thomas Robbins 1959-3-29 3965 Alameda Just north of Depot Road at its western end, adjacent to the American Salt Co., along the shore of San Francisco Bay, about 1 1/2 miles northwest of Mt. Eden and about 3/4 miles south of Russell. 1 Comment
  SD45206  Lepidium flavum G. Thomas Robbins 1950-4-2 3310 Kern Red Rock Canyon near The Temple, ca. 1 mile south of Ricardo 760 Comment
  JEPS7457  Lepidium jaredii G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3454 San Luis Obispo about 8 mi se Soda Lake (just e of lowest point in Carrizo Plain); Carrizo Plain 594 Comment
  UC1010764  Lepidium jaredii G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3454 San Luis Obispo about 8 mi se Soda Lake (just e of lowest point in Carrizo Plain); Carrizo Plain 594 Comment
  JEPS7769  Lepidium lasiocarpum var. lasiocarpum G. Thomas Robbins 1952-4-29 3479 San Bernardino s and above Gilroy Canyon (e Mohave Desert); Mohave Desert, Providence Mountains Comment
  UC747368  Lepidium nitidum G. Thomas Robbins 1943-4-15 1000 El Dorado about 3 mi e Camino (above North Fork Webber Creek) 975 Comment
  JEPS21993  Lepidium oxycarpum G. Thomas Robbins 1958-4-19 3816 Alameda ca. 0.6 mi. w. Mt. Eden Station (at w. end of Depot Rd., adjacent to San Francisco Bay) 1 Comment
  UCD115766  Lepidium oxycarpum G. Thomas Robbins 1958-4-19 3816 Alameda West end of Depot Road, adjacent to San Francisco Bay, about 0.6 mile west of Mt. Eden Station. 1 Comment
  JEPS25136  Lepidium strictum G. Thomas Robbins 1959-4-26 4006 Contra Costa about 1 mi ne Giant (and about 0.25 mi n of San Pablo Oil Tank Farm) 7 Comment
  CAS-BOT-BC13004  Lepidium virginicum G. Thomas Robbins 1945-5-15 1907 El Dorado At C.C.C. Camp Snowline, 3 miles east of Camino. 1036 Comment
  UC747383  Lepidium virginicum G. Thomas Robbins 1945-5-15 1907 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline) 1036 Comment
  JEPS15570  Leptodactylon pungens G. Thomas Robbins with L. R. Heckard 1956-7-25 3710 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, s flank of Snow Mt. East, at lower edge of cirque between Snow Mt. Wsst and Snow Mt. East); Snow Mt. East, Dark Hollow Creek (trib. Middle Fork Stony Cr 1981 Comment
  UC972332  Leptodactylon pungens G. Thomas Robbins 1945-8-12 2127 El Dorado near summit of Freel Peak; near summit of Freel Peak 3322 Comment
  CAS-BOT-BC226980  Leptosiphon ambiguus G. Thomas Robbins 1950-4-23 3340 Santa Clara 2.5-3 miles northeast of Coyote, foothills of the Mount Hamilton Range 365 Comment
  SEINET3363427 Image available Leptosiphon androsaceus G. Thomas Robbins 1944-4-14 1506 Marin Big rock ridge, 2 miles west of Hamilton Field Air Base 61 Comment
  SEINET7967473 Image available Leptosiphon androsaceus G. Thomas Robbins 1937-5-23 182 Sonoma Along roadside near Wright School, between Santa Rosa and Sebastopol Comment
  POM196068  Leptosiphon androsaceus L. F. Robbins 1927-4-15 s.n. Napa [no locality information provided] Comment
  UCSB5168  Leptosiphon bicolor Robbins, G. 1945-5-20 El Dorado Placerville - Rescue Road, 3 miles east of Rescue 457 Comment
  UCSB7322  Leptosiphon ciliatus Robbins, G. 1944-7-28 El Dorado 1/2 mile south of Wrights Lake 2133 Comment
  RSA98609  Leptosiphon montanus G. Thomas Robbins 1945-6-17 1986 El Dorado above Camp Creek near Baltic Peak. 1006 Comment
  SBBG60886  Leptosyne bigelovii R. C. and J. R. Robbins 1921-4-4 Santa Barbara Cold Springs Trail, Montecito Comment
  SD45401  Leptosyne bigelovii G. Thomas Robbins 1950-4-2 3296 Kern Above Kern River, about one mile northeast of Isabella. 760 Comment
  SBBG60874  Leptosyne californica R. C. and J. R. Robbins 1921-1 Santa Barbara La Cumbre Club Comment
  SBBG79708  Leptosyne gigantea R. C. and J. R. Robbins 1922-3-28 Santa Barbara Santa Cruz Island Comment
  JEPS15560  Lesquerella occidentalis subsp. occidentalis G. Thomas Robbins with L. R. Heckard 1956-7-25 3721 Lake summit summit of Snow Mt. West (Lake-Colusa Co. boundary); Snow Mt. West 2145 Comment
  JEPS25286  Lessingia leptoclada G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4176 Tuolumne about one-half mile upstream from Italian Bar crossing (above shore of South Fork of Stanislaus River); South Fork of Stanislaus River 518 Comment
  POM196067  Lessingia leptoclada L. F. Robbins 1927-9-11 s.n. El Dorado Near Camino Comment
  UC747137  Lessingia leptoclada G. Thomas Robbins 1943-8-21 1366 El Dorado 3 mi e Placerville; Eddy Arboretum, Institute of Forest Genetics 822 Comment
  JEPS25003  Lessingia ramulosa G. Thomas Robbins 1958-8-13 3928 Mendocino along State Hwy 128 4 mi se Boonville Comment
  UCD134124  Leucanthemum vulgare Robbins; Raynor 1943-6-1 s.n. Plumas Quincy. Comment
  CAS-BOT-BC56399  Leucothoe davisiae G. Thomas Robbins 1943-6-20 1190 El Dorado near head of Long Canyon, 2-3 mi. w. of Pollock Pines 975 Comment
  UC747669  Leucothoe davisiae G. Thomas Robbins 1943-6-20 1190 El Dorado 2-3 mi w of Pollock Pines (near head of Long Canyon); Long Canyon 975 Comment
  JEPS15551  Lewisia triphylla G. Thomas Robbins with L. R. Heckard 1956-7-25 3708 Colusa meadow along trail due s, skirting e base of ridge forming Snow Mt. West Snow Mt. East; Snow Mt. West 1981 Comment
  UC746849  Lewisia triphylla G. Thomas Robbins 1945-7-1 2018 El Dorado on road 4 mi s Wrights Lake (near Lyons Creek); Lyons Creek 2042 Comment
  UC746850  Lewisia triphylla G. Thomas Robbins 1945-7-1 2023 El Dorado near Wrights Lake 2133 Comment
  JEPS22090  Leymus X multiflorus G. Thomas Robbins 1958-7-19 3902 Contra Costa about 1/2 mi e Pt. San Pablo (meadow overlooking San Pablo Bay); Richmond Comment
  JEPS25155  Leymus X multiflorus G. Thomas Robbins with John Weiler 1959-5-23 4026 Contra Costa Brooks Island San Francisco Bay, Richmond (slopes on w side) Comment
  JEPS22010  Leymus triticoides G. Thomas Robbins 1958-6-14 3870 Alameda alkaline field near end of Willow Road (sw of Newark) 3 Comment
  SEINET8533919 Image available Libocedrus decurrens G. Thomas Robbins 1944-1 1832 El Dorado At CCC Camp Snowline, 3 miles east of Camino. elevation 3400 feet. 1036 Comment
  CAS-BOT-BC436021  Ligusticum grayi G. Thomas Robbins 1943-9-5 1380 El Dorado Along trail to Mt. Tallac above Gilmore Lake 2590 Comment
  CAS-BOT-BC130705  Lilium pardalinum G. Thomas Robbins 1945-7-16 2065 El Dorado Along North Fork Webber Creek, 3 mi. e. of Camino 914 Comment
  UC747532  Lilium pardalinum G. Thomas Robbins 1945-7-16 2065 El Dorado about 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747550  Lilium pardalinum G. Thomas Robbins 1943-7-10 1265 El Dorado about 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747518  Lilium parvum G. Thomas Robbins 1943-8-15 1349 El Dorado 2.5 mi ne Wrights Lake (in bed of Grouse Creek, below Grouse Lake); Grouse Creek 2438 Comment
  CAS-BOT-BC509418  Lilium parvum G. Thomas Robbins 1943-8-15 1349 El Dorado Bed of Grouse Creek below Grouse Lake, 21/2 mi. NE of Wrights Lake 2438 Comment
  UC747534  Lilium washingtonianum subsp. washingtonianum G. Thomas Robbins 1943-6-20 1204 El Dorado 4-5 mi nw Pollock Pines (along road to powerhouse) 914 Comment
  UC747317  Limnanthes alba subsp. alba G. Thomas Robbins 1943-4-18 1007 Sacramento ca 15 mi ne Sacramento; Carmichael District Comment
  UCD116467  Limnanthes alba subsp. alba W. W. Robbins 1926-4-17 535 Lassen Grass Valley. Comment
  UC747316  Limnanthes alba subsp. versicolor G. Thomas Robbins 1943-5-2 1063 El Dorado along creek about 3 mi e Camino; North Fork Webber Creek 914 Comment
  POM181659  Limnanthes douglasii subsp. rosea L. F. Robbins 1927-5-6 s.n. Sacramento Campus of Sacramento Junior College. Comment
  OBI4182  Limonium californicum G. Thomas Robbins 1959-8-2 4117 Alameda 1/4 mi N of the W end of Depot Rd, just E of the American Salt co evaporating ponds along the shore of San Francisco Bay, about 1-3/4 mi NW of Mt Eden about 3/4 mi S of Russell 2 Comment
  UC747616  Linanthus acicularis G. Thomas Robbins 1945-5-5 1872 Marin 2-3 mi w Hamilton Air Force Field (at n base of Big Rock Ridge); Big Rock Ridge Comment
  UC907982  Linanthus androsaceus G. Thomas Robbins 1944-4-14 1506 Marin ca 2 mi w Hamilton Field Air Base; Big Rock Ridge 60 Comment
  UC1023039  Linanthus bicolor G. Thomas Robbins 1945-4-22 1841 El Dorado 2-3 mi nw Shingle Springs 457 Comment
  UC1023041  Linanthus bicolor G. Thomas Robbins 1944-5-21 1615 El Dorado about 3 mi e Camino (canyon of North Fork Webber Creek); North Fork Webber Creek 975 Comment
  UC747615  Linanthus bicolor G. Thomas Robbins 1945-5-20 1923 El Dorado 3 mi e Rescue (along Placerville-Rescue road) 457 Comment
  UC908663  Linanthus bicolor G. Thomas Robbins 1944-5-21 1615 El Dorado ca 3 mi e Camino (above North Fork Webber Creek) 975 Comment
  UC1023040  Linanthus bicolor G. Thomas Robbins 1943-4-21 1020 El Dorado 3 mi e Placerville (at w edge of Institute of Forest Genetics); Institute of Forest Genetics 822 Comment
  UC972334  Linanthus ciliatus G. Thomas Robbins 1944-6-11 1674 El Dorado 2-3 mi ne Riverton (along Ice House Road) 1219 Comment
  SD45404  Linanthus dichotomus G. Thomas Robbins 1950-4-1 3293 Kern Gravelly slopes above Kern River, about 1 mile east of Isabella Comment
  UC747610  Linanthus dichotomus G. Thomas Robbins 1945-4-22 1863 El Dorado 3 mi e Shingle Springs (along U.S. Highway 50) 457 Comment
  UCSB5178  Linanthus dichotomus Robbins, G. 1945-4-22 El Dorado Serpentine rock outcrop 3 miles east of Shingle Springs along U. S. Highway 50 457 Comment
  JEPS24409  Linanthus filipes G. Thomas Robbins 1943-7-18 1273 El Dorado along Pleasant Valley road Sly Park 914 Comment
  UC907942  Linanthus filipes G. Thomas Robbins 1944-6-18 1717 El Dorado 5 mi s Pollock Pines; Sly Park 975 Comment
  UC747604  Linanthus filipes G. Thomas Robbins 1943-7-18 1273 El Dorado near Sly Park (along Pleasant Valley Road) 914 Comment
  UC1008646  Linanthus montanus G. Thomas Robbins 1944-4-23 1560 El Dorado about 4 mi nw Camino (along Chute Camp Road, above Iowa Creek) 609 Comment
  UC747474  Linanthus montanus G. Thomas Robbins 1944-5-22 1631 El Dorado ca 3 mi e Placerville (along U.S. Highway 50) 670 Comment
  UC747605  Linanthus montanus G. Thomas Robbins 1945-6-17 1986 El Dorado near Baltic Peak (above Camp Creek) 975 Comment
  UC907692  Linanthus pachyphyllus G. Thomas Robbins 1945-8-12 2140 El Dorado w of High Meadow (along Freel Peak trail); Freel Peak 2286 Comment
  JEPS7456  Linanthus parryae G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3433 San Bernardino about midway between Barstow and Kramer Mohave Desert 731 Comment
  JEPS22972  Linanthus parviflorus G. T. Robbins 1943-4-14 995 El Dorado just w Smith Flat 670 Comment
  UC747617  Linanthus parviflorus G. Thomas Robbins 1945-4-22 1861 El Dorado about 3 mi e Shingle Springs 457 Comment
  UC908034  Linanthus parviflorus G. Thomas Robbins 1944-4-14 1514 Marin ca 2 mi w Hamilton Air Field Base; Big Rock Ridge 60 Comment
  UC1008648  Linanthus parviflorus G. Thomas Robbins 1943-4-21 1019 El Dorado 3 mi e Placerville (w edge of Institute of Forest Genetics) 822 Comment
  UC972333  Linanthus parviflorus G. Thomas Robbins 1943-4-14 995 El Dorado 3 mi e Placerville (near Insititute of Forest Genetics) 762 Comment
  UCSB7586  Linanthus pungens Robbins, G.; Bacigalupi, Rimo; Constance, Lincoln 1952-5-1 Inyo Titus Canyon, Grapevinfe Mountains, Death Valley National Monument 1524 Comment
  JEPS23256  Linaria vulgaris G. Thomas Robbins 1958-8-11 3924 Sonoma w of the town of Bodega (along Estero Lane a dirt road about 2 mi s of State Highway 1); Estero Lane Comment
  UC746865  Lithocarpus densiflorus G. Thomas Robbins 1943-6-20 1194 El Dorado 4-5 mi nw Pollock (along road to powerhouse, n-facing wall of South Fork American River); South Fork American River 914 Comment
  UC1084400  Lithophragma affine G. Thomas Robbins 1937-4-17 128 Contra Costa near Point Richmond Comment
  UC747340  Lithophragma affine G. Thomas Robbins 1944-4-14 1520 Marin about 3 mi w Hamilton Field Air Base (on n slope of Big Rock Ridge); w of Hamilton Field Air Base, n slope of Big Rock Ridge 60 Comment
  CAS-BOT-BC430614  Lithophragma affine G. Thomas Robbins 1944-4-14 1520 Marin small stream on north slope of Big Rock Ridge, about 3 mi. w. of Hamilton Field Air Force Base 91 Comment
  UC747345  Lithophragma glabrum G. Thomas Robbins 1943-6-27 1223 El Dorado ridge above Echo Summit Pass (about 0.75 mi sw of U. S. Highway 50) 2438 Comment
  UC747342  Lithophragma heterophyllum G. Thomas Robbins 1944-4-14 1518 Marin about 3 mi w Hamilton Field Air Base (n slope of Big Rock Ridge); Big Rock Ridge 60 Comment
  JEPS23822  Lobelia dunnii var. serrata G. Thomas Robbins with John Weiler 1959-8-6 4127 Monterey along Big Sur River, at and just n of Big Sur (River Village) Post Office Big Sur River; , Big Sur Post Office 38 Comment
  JEPS14573  Logfia filaginoides G. Thomas Robbins with Peter H. Raven 1956-4-28 3675 El Dorado 2.4 mi. s. Kelsey (1.5 mi. n. and on grade above S. Fork American R., along Placerville-Georgetown rd.) 457 Comment
  JEPS7929  Logfia filaginoides G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3495 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains, Titus C 1524 Comment
  CAS-BOT-BC342122  Logfia filaginoides G. Thomas Robbins; Peter H. Raven 1956-4-28 3675 El Dorado Along Placerville - Georgetown road, 2.4 miles south of Kelsey and 1.5 miles north and on grade above South Fork American River 457 Comment
  JEPS7462  Lomatium mohavense G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3439 Kern ca. 10 mi. w. Kramer (on rd. to Mojave); Mohave Desert 762 Comment
  SBBG59798  Lomatium mohavense J. R. and R. C. Robbins 1930-3-25 Los Angeles W Mojave Desert Comment
  JEPS15698  Lomatium nevadense var. nevadense G. Thomas Robbins 1956-9-9 3759 Alpine 1/2 to 3/4 mi. due w. Carson Pass (lower s. slopes of Red lake Peak, above State Hwy. 88); Red Lake Peak 2651 Comment
  JEPS25112  Lomatium nudicaule G. Thomas Robbins with Hsuan Keng and Erika Amstutz 1959-4-3 3968 Sonoma s.w. El Verano (along Arnold Dr.); Sonoma Valley 30 Comment
  UC747233  Lomatium utriculatum G. Thomas Robbins 1944-6-15 1690 El Dorado 2-3 mi E of Placerville (along US Hwy 50) 762 Comment
  UC747220  Lomatium utriculatum G. Thomas Robbins 1943-4-30 1051 El Dorado 2 1/2 mi. e. Placerville (w. edge of Institute of Forest Genetics); Institute of Forest Genetics 792 Comment
  UC747098  Lonicera conjugialis G. Thomas Robbins 1943-7-25 1309 El Dorado about 2 mi nw Echo Lake (along trail to Desolation Valley) 2286 Comment
  SBBG69546  Lonicera hispidula R. C. and J. R. Robbins 1921-5-21 Santa Barbara Bothin Ridge, Montecito Comment
  UC747082  Lonicera hispidula var. vacillans G. Thomas Robbins 1942-10-22 917 El Dorado about 5 mi ne Placerville; Iowa Creek 914 Comment
  CAS-BOT-BC240665  Lonicera interrupta G. Thomas Robbins 1944-6-15 1689 El Dorado Along U.S. Highway 50, 2-3 mi. e. of Placerville 762 Comment
  UC747099  Lonicera interrupta G. Thomas Robbins 1944-6-15 1689 El Dorado 2-3 mi e Placerville (along U. S. Highway 50) 762 Comment
  UC532165  Lonicera subspicata var. denudata L. F. Robbins July 1927 Los Angeles near Altadena Comment
  SEINET3557099 Image available Lotus crassifolius G. Thomas Robbins 1944-6-11 1677 El Dorado Along Ice House Road, 2-3 miles NE of Riverton 1219 Comment
  UC747250  Lotus crassifolius var. crassifolius G. Thomas Robbins 1944-6-11 1677 El Dorado 203 mi ne Riverton (along Ice House Road) 1219 Comment
  UC1057478  Lotus formosissimus G. Thomas Robbins 1937-5-23 211 Sonoma about 10 mi w Santa Rosa (on Pitkin Ranch, Vine Hill region); Vine Hill Region Comment
  UC1084493  Lotus heermannii G. Thomas Robbins 1940-5-15 314 San Francisco vicinity Rivera Street and 28th Avenue; Sunset District Comment
  UC1057448  Lotus humistratus G. Thomas Robbins 1937-4-11 97 San Mateo near Spring Valley Lakes (along road to Woodside) Comment
  UC747290  Lotus humistratus G. Thomas Robbins 1943-4-6 980 El Dorado 2 mi e Placerville (immediately s of Institute of Forest Genetics) 792 Comment
  UC747249  Lotus incanus G. Thomas Robbins 1944-5-28 1642 El Dorado 4-5 mi nw Pollock Pines (along road to power house) 914 Comment
  SEINET3523637 Image available Lotus incanus G. Thomas Robbins 1944-5-28 1642 El Dorado Along road to power house, 4-5 mi NW of Pollock Pines 914 Comment
  UC747289  Lotus micranthus G. Thomas Robbins 1943-4-14 994 El Dorado w edge Institute of Forest Genetics 731 Comment
  UC746973  Lotus nevadensis var. nevadensis G. Thomas Robbins 1944-6-11 1675 El Dorado 2-3 mi ne Riverton (along Ice House Road) 1219 Comment
  SEINET3694381 Image available Lotus oblongifolius var. torreyi G. Thomas Robbins 1943-6-5 1655 El Dorado North Fork Webber Creek, 3 mi E of Camino 975 Comment
  SEINET3694460 Image available Lotus pinnatus G. Thomas Robbins 1944-6-18 1715 El Dorado Sly Park, 5 miles S of Pollock Pines 1006 Comment
  UC747248  Lotus purshianus var. purshianus G. Thomas Robbins 1944-6-15 1692 El Dorado 3 mi e Placerville (in Institute of Forest Genetics Arboretum) 822 Comment
  JEPS25107  Lotus scoparius G. Thomas Robbins 1959-4-12 3983 Contra Costa about 0.5 mi sw junction of Hoffmann Blvd. and S. 25th St. 6 Comment
  SBBG67096  Lupinus J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC907699  Lupinus albicaulis G. Thomas Robbins 1944-6-3 1648 El Dorado 3 mi E of Camimo ( along U.S. Hwy. 50) Comment
  GH366661  Lupinus albifrons G. T. Robbins 1945-4-22 1860 Unknown 3 mi. e. of Shingle Springs 457 Comment
  SEINET195642  Lupinus albifrons G. Thomas Robbins 1943-6-5 1653 El Dorado North Fork Webber Creek, about 3 miles east of Camino 1036 Comment
  UC747241  Lupinus albifrons G. Thomas Robbins 1944-4-23 1561 El Dorado along Chute Camp Road ca 4 mi n Camino (above Iowa Creek); above Iowa Creek 762 Comment
  UC907700  Lupinus albifrons G. Thomas Robbins 1945-4-22 1860 El Dorado 3 mi e Shingle Springs; e of Shingle Springs 457 Comment
  UC907702  Lupinus albifrons G. Thomas Robbins 1943-6-5 1653 El Dorado 3 mi e Camino (slope above North Fork Webber Creek); North Fork Webber Creek, e of Camino 1036 Comment
  CAS-BOT-BC201380  Lupinus albifrons var. albifrons G. Thomas Robbins 1944-4-23 1561 El Dorado Above Iowa Creek along Chute Camp Road, ca. 4 mi. n. of Camino 762 Comment
  CAS-BOT-BC201382  Lupinus albifrons var. albifrons G. Thomas Robbins 1943-6-5 1653 El Dorado Above North Fork Webber Creek, 3 mi. e. of Camino 1036 Comment
  UC1084380  Lupinus albifrons var. collinus G. Thomas Robbins 1937-4-11 79 San Mateo Skyline Boulevard near County Jail San Francisco (San Francisco); s of San Francisco Comment
  JEPS25126  Lupinus arboreus G. Thomas Robbins 1959-4-18 3995 Contra Costa near and n Pt. Richmond (above Western Drive, western slopes of the Potrero Hills, Richmond); Richmond, near and n of Pt. Richmond 7 Comment
  SBBG67097  Lupinus benthamii J. R. and R. C. Robbins 1932-6-8 Tulare Sequoia Nat Park 914 Comment
  JEPS25110  Lupinus bicolor G. Thomas Robbins 1959-4-5 3971 Alameda Vacant lot at corner of 61st St. and Shattuck Ave.; Oakland 33 Comment
  SBBG71263  Lupinus bicolor J. R. and R. C. Robbins 1930-3-28 Kern 2 mi from Isabella, Kern Valley Comment
  UC532189  Lupinus bicolor L. F. Robbins 1927-4-22 Sacramento on Freeport Boulevard Levee Sacramento River; Levee of Sacramento River Comment
  UC747292  Lupinus bicolor G. Thomas Robbins 1943-4-20 1014 El Dorado about 3 mi e Camino (on canyon slope above North Fork Webber Creek); above North Fork Webber Creek 975 Comment
  UC907707  Lupinus bicolor G. Thomas Robbins 1943-4-18 1003 Sacramento Carmichael District ca 15 mi ne Sacramento; ne of Sacramento Comment
  UC1057458  Lupinus bicolor G. Thomas Robbins 1937-4-11 103 San Mateo along roadside near Redwood City; near Redwood City Comment
  UC907740  Lupinus breweri G. Thomas Robbins 1945-7-8 2037 El Dorado near Al Tahoe; Lake Tahoe, near Al Tahoe 1920 Comment
  CAS-BOT-BC208877  Lupinus breweri var. breweri G. Thomas Robbins 1945-7-8 2037 El Dorado Near Al Tahoe, Lake Tahoe. 1920 Comment
  UC1084497  Lupinus chamissonis G. Thomas Robbins 1940-5-15 318 San Francisco Sunset District Sunset District, San Francisco (San Francisco); , Sunset District Comment
  OBI12898  Lupinus formosus G. Thomas Robbins 1959-8-2 4121 Alameda Northern edge of IRvington, about 1/4 mi W of Stivers Pond 15 Comment
  UC907693  Lupinus latifolius var. columbianus G. Thomas Robbins 1944-7-6 1748 El Dorado Sly Park 5 mi s Pollock Pines; s of Pollock Pines 975 Comment
  UC907696  Lupinus latifolius var. columbianus G. Thomas Robbins 1943-6-5 1123 El Dorado ca 3 mi e Camino (shady ravine above North Fork Webber Creek); above North Fork Webber Creek 975 Comment
  UC532188  Lupinus microcarpus var. densiflorus L. F. Robbins 1928-4-15 Yolo Capay Valley Comment
  UC907703  Lupinus microcarpus var. densiflorus G. Thomas Robbins 1943-4-18 1004 Sacramento ca 15 mi ne Sacramento (Carmichael District) Comment
  UC532192  Lupinus nanus L. F. Robbins 1928-3-18 Solano Putah Canyon Comment
  UC907697  Lupinus nanus G. Thomas Robbins 1943-4-28 1041 El Dorado on slope above Smithflat 762 Comment
  JEPS25125  Lupinus rivularis G. Thomas Robbins 1959-4-25 3996 Alameda about 0.2 mi above Broadway Terrace along the s side Clarewood Drive (Oakland Hills); Oakland, Oakland Hills 91 Comment
  JEPS25128  Lupinus succulentus G. Thomas Robbins 1959-4-18 3993 Contra Costa road fill along Western Drive near and n Pt. Richmond (western base of Potrero Hills, Richmond); Richmond, n of Pt. Richmond, western base Potraro Hills 4 Comment
  UC907695  Lupinus succulentus G. Thomas Robbins 1943-4-18 1002 Sacramento Carmichael District ca 15 mi ne Sacramento; ne of Sacramento Comment
  UC747498  Luzula macrantha G. Thomas Robbins 1944-6-3 1649 El Dorado Along U.S. Highway 50 ca 3 mi E of Camino 1036 Comment
  OBI21194  Luzula macrantha G. Thomas Robbins 1959-4-18 3987 Contra Costa Partial shade of Baccharis pilularis var. consanguinea at edge of Juncus effusus meadow overlooking San Pablo Bay, about 1/2 mile east of Pt. San Pablo, Richmond 8 Comment
  UCD115953  Lyrocarpa coulteri W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS25283  Madia elegans G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-25 4173 Tuolumne about 1 mi w South Fork of the Stanislaus River (Five Mile Creek just above the road crossing to Italian Bar); Five Mile Creek 472 Comment
  UC907608  Madia elegans G. Thomas Robbins 1945-6-17 1981 El Dorado near Baltic Peak (above Camp Creek) 1005 Comment
  CAS-BOT-BC342741  Madia elegans G. Thomas Robbins 1943-10-16 1401 El Dorado At Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UCD134240  Madia elegans Robbins; Raynor 1943-6-1 s.n. Butte Feather River Canyon near Pulga. Comment
  CAS-BOT-BC344425  Madia exigua G. T. Robbins 1939-5-29 s.n. Monterey Frances Simes Hastings Natural History Reservation, upper Carmel Valley about 2 miles northeast of Jamesburg Comment
  POM308654  Madia exigua G. Thomas Robbins 1939-5-29 s.n. Monterey Francis Simes Hastings Natural History Reservation, upper Carmel Valley about 2 miles northeast of Jamesburg Comment
  JEPS21969  Madia gracilis G. Thomas Robbins with S. Galen Smith 1958-6-2 3848 A Contra Costa just e Hercules city boundary (grassy slope along Franklin Canyon Road (State Hwy 4) s and above Refugio Valley) 18 Comment
  CAS-BOT-BC342907  Madia gracilis G. Thomas Robbins 1943-6-5 1129 El Dorado On canyon slope above North Fork Webber Creek, about 3 mi. e. of Camino 975 Comment
  UC747195  Madia sativa G. Thomas Robbins 1943-7-10 1261 El Dorado 3 mi e Placerville (Eddy Arboretum, Institute of Forest Genetics); Institute of Forest Genetics, Eddy Arboretum 822 Comment
  UCD134341  Madia sativa G. Thomas Robbins; S. Galen Smith 1958-6-2 3848 B Contra Costa Along Franklin Canyon Road (State Highway 4) south and above Refugio Valley just east of Hercules city boundary. 18 Comment
  GH414725  Madia yosemitana G. T. Robbins 1943-4-15 997 Unknown North Fork Webber Creek, about 3 miles east of Camino 975 Comment
Read comments
Apr 11 2013
  CAS-BOT-BC510741  Maianthemum racemosum subsp. amplexicaule G. Thomas Robbins 1943-5-23 1078 El Dorado Shady woods along North Fork Webber Creek, 3 mi. e. of Camino 914 Comment
  SBBG71553  Malacothamnus fasciculatus var. nuttallii R. Robbins 1947-8-14 Ventura Casitas Pass Comment
  JEPS7481  Malacothrix californica G. Thomas Robbins and Rimo Bacigalupi 1952-4-26 3464 Kern Hills immediately east of Kernville on dirt road to Weldon. 518 Comment
  UC1084496  Malva nicaeensis G. Thomas Robbins 1940-5-15 317 San Francisco San Francisco, Sunset District, vicinity of Rivera Street and 28th Avenue San Francisco; , Sunset District Comment
  SEINET7248012  Malva pseudolavatera G. Thomas Robbins 1958-1 3819 Alameda Along roadside west of Russell and about .25 miles east of Hayward Landing on San Francisco Bay. 2 Comment
  UCD116693  Malva pseudolavatera G. Thomas Robbins 1958-4-19 3819 Alameda Along roadside west of Russell and about 1/4 mile east of Hayward Landing on San Francisco Bay. 1 Comment
  JEPS22103  Malvella leprosa G. Thomas Robbins 1958-7-26 3913 Alameda bed of S.P.R.R. tracks at w. end of Folger Ave. just above Ashby Ave. underpass Berkeley Comment
  UCD81551  Malvella leprosa W. W. Robbins; W. D. Norton 1928-8-1 1419 Yolo near Clarksburg. Comment
  OBI12336  Malvella leprosa G. Thomas Robbins 1958-6-14 3866 Alameda Along borders of slough along Mt. Eden Rd, about 1.5 mi N of Alvarado 3 Comment
  UCD116702  Malvella leprosa G. Thomas Robbins 1958-7-26 3913 Alameda Bed of Southern Pacific railroad tracks at west end of Folger Ave., just above the Ashby Ave. underpass, Berkeley. Comment
  SD185655  Marah macrocarpa var. macrocarpa Jolynn Robbins 2006-4-9 47 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC747040  Marah watsonii G. Thomas Robbins 1944-5-16 1606 El Dorado 3 mi e Placerville (hillside w Institute of Forest Genetics) 762 Comment
  UCD106743  Marina parryi W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  SD158110  Marrubium vulgare Jolynn Robbins 2004-4-5 3 San Diego Damon Lane County Park in El Cajon. South on Jamacha, right on Fury. Then right on Wieghorst, left on Calle Albara. 68 Comment
  JEPS25077  Marsilea vestita subsp. vestita G. Thomas Robbins with S. Galen Smith 1959-1-4 3957 Solano ca. 2 1/2 mi ne Vacaville (ca. 1/2 mi e of Winters rd junction, field just n of U.S. Hwy 40); Sacramento Valley 27 Comment
  UCD107740  Medicago lupulina Robbins and Raynor 1943-6-1 s.n. Plumas Belden. Comment
  UCD107741  Medicago lupulina Robbins 1950-5-23 s.n. Monterey Carmel. Comment
  JEPS25127  Melica californica G. Thomas Robbins 1959-4-18 3994 Contra Costa near and n Pt. Richmond (along Western Drive, at the w base of Potrero Hills); Richmond, Potrero Hills 7 Comment
  UC907660  Melica californica G. Thomas Robbins 1945-5-18 1917 El Dorado about 3 mi e Placerville (near Institute of Forest Genetics) 731 Comment
  UC907662  Melica californica G. Thomas Robbins 1945-5-17 1913 El Dorado about 3 mi e Camino; North Fork Webber Creek 975 Comment
  UCD88023  Melica imperfecta G. Thomas Robbins; Rimo Bacigalupi 1952-4-26 3463 Kern Above Kern River, Kern River Canyon, about 3 miles west of Democrat Springs road junction. 563 Comment
  JEPS15679  Melica subulata G. Thomas Robbins 1956-9-14 3780 El Dorado about 0.5 mi nw Echo Summit (along U.S. Hwy 50) 2225 Comment
  JEPS25163  Melica torreyana G. Thomas Robbins 1959-5-27 4035 Alameda w shore Lake Temescal; Oakland 137 Comment
  UCD89119  Melica torreyana G. Thomas Robbins 1959-5-27 4035 Alameda Along the west shore of Lake Temescal (reservoir), Oakland. 137 Comment
  OBI13670  Melissa officinalis G. Thomas Robbins 1959-8-1 4115 Contra Costa Las Trampas Crk, about 1.5 mi SE of St. Marys College 183 Comment
  SBBG69336  Mentzelia affinis Jane R. Robbins 1930-4-17 Santa Barbara Little Pine Mtn Comment
  SD45207  Mentzelia albicaulis G. Thomas Robbins 1950-4-7 3325 Inyo About 5 miles south of Lone Pine 1067 Comment
  RSA440469  Mentzelia laevicaulis L. F. Robbins 1926-8-15 s.n. Unknown Putah Canyon. Comment
  UC7471  Mentzelia pectinata G. Thomas Robbins, Rimo Bacigalupi 1952-4-20 3446 Kern 2.3 mi w U.S. Highway (along road to Elkhorn Plain); Bitterwater Creek 518 Comment
  CAS-BOT-BC428467  Micranthes aprica G. Thomas Robbins 1945-7-1 2025 El Dorado Along trail to Grouse Lake, 1 1/2 mi. e. of Wrights Lake 2286 Comment
  CAS-BOT-BC428776  Micranthes californica G. Thomas Robbins 1944-4-23 1554 El Dorado Above South Fork American River, about 5 mi. n. of Camino 762 Comment
  UCD102826  Micranthes californica W. W. Robbins 1928-4-29 944 Unknown County Unknown: American River. Comment
  UC747134  Micropus californicus var. californicus G. Thomas Robbins 1943-4-30 1055 El Dorado near Institute of Forest Genetics (3 mi e of Placerville) 762 Comment
  UC907710  Micropus californicus var. californicus G. Thomas Robbins 1944-4-14 1542 Marin low hills immediatly w Hamilton Field Air Base 152 Comment
  CAS-BOT-BC348368  Micropus californicus var. californicus G. Thomas Robbins 1943-4-30 1055 El Dorado Slope near Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC907778  Micropus californicus var. californicus G. Thomas Robbins 1944-5-15 1601 El Dorado 3 mi e Placerville (western boundary of Institute); Institute of Forest Genetics 762 Comment
  JEPS14576  Microseris douglasii subsp. tenella G. Thomas Robbins with Peter H. Raven 1956-4-28 3665 Contra Costa just s El Cerrito city limits (along Arlington Ave at Kenilworth Dr); Berkeley Hills 213 Comment
  UC747069  Mimulus angustatus G. Thomas Robbins 1945-6-17 2003 El Dorado Sly Park meadow 975 Comment
  UC747080  Mimulus angustatus G. Thomas Robbins 1944-5-7 1587 El Dorado near Sly Park meadow (along Pleasant Valley Road) 975 Comment
  RSA102192  Mimulus aurantiacus var. aurantiacus G. Thomas Robbins 1945-5-20 1936 El Dorado 3-4 mi. s. of Salmon Falls 183 Comment
  UC747086  Mimulus aurantiacus var. aurantiacus G. Thomas Robbins 1944-4-14 1512 Marin 2-3 mi w Hamilton Field Air Base (n slope of Big Rock Ridge) 152 Comment
  UC747127  Mimulus aurantiacus var. aurantiacus G. Thomas Robbins 1945-5-20 1936 El Dorado 3-4 mi s Salmon Falls; Sweetwater Creek 182 Comment
  JEPS4724  Mimulus bigelovii var. cuspidatus G. T. Robbins and Rimo Bacigalupi with L. Constance, George Gillett and L. R. Heckard 1952-5-1 3498 Inyo Titus Canyon Death Valley National Monument, Grapevine Mts. 1524 Comment
  JEPS5580  Mimulus bigelovii var. cuspidatus G. T. Robbins and Rimo Bacigalupi with L. Constance, George Gillett and L. R. Heckard 1952-5-1 3513 Inyo Titus Canyon Death Valley National Monument, Grapevine Mts. 701 Comment
  JEPS7786  Mimulus bolanderi G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3544 Tulare about 1/4 mi e Milo junction (along road to Balch Park, 7.5 mi n of Springville) 548 Comment
  UC747118  Mimulus breweri G. Thomas Robbins 1943-8-15 1339 El Dorado 2 mi ne Wright's Lake (along trail to Grouse Lake) 2438 Comment
  JEPS22108  Mimulus cardinalis G. Thomas Robbins with H. G. Baker, G. Newcomb, and R. Ornduff 1958-7-30 3918 Tuolumne at bridge crossing 1.5 mi s Italian Bar; Fivemile Creek (tributary of South Fork Stanislaus River) 469 Comment
  UC747071  Mimulus cardinalis G. Thomas Robbins 1943-6-17 1181 El Dorado 3 mi e Placerville (Institute of Forest Genetics) 822 Comment
  JEPS4709  Mimulus geniculatus G. T. Robbins and Rimo Bacigalupi 1952-4-16 3422 Kern w Miracle Hot Springs (formerly Hobo); Lower Kern River Canyon 701 Comment
  JEPS14538  Mimulus guttatus G. Thomas Robbins with Peter H. Raven 1956-4-29 3688 El Dorado 1.2 mi nw Somerset (Youngs) (near bridge crossing river); Canyon of North Fork Cosumnes River Comment
  JEPS19393  Mimulus inodorus G. Thomas Robbins 1937-6-5 226 Sonoma 10 mi w Santa Rosa (Pitkin Ranch); Vine Hill region Comment
  UC747038  Mimulus kelloggii G. Thomas Robbins 1945-4-13 1839 El Dorado 2 1/2 mi e Placerville (above Smithflat) 762 Comment
  UC747111  Mimulus kelloggii G. Thomas Robbins 1943-3-20 965 El Dorado about 3 mi e Placerville (hillside w of Institute of Forest Genetics) 762 Comment
  SBBG28907  Mimulus lewisii G. T. Robbins 1943-7-25 1325 El Dorado above S shore of Echo Lake 2194 Comment
  JEPS15581  Mimulus nanus var. mephiticus G. Thomas Robbins 1956-9-9 3754 B Alpine 1/2 to 3/4 mi due w Carson Pass (above State Highway 88, lower slopes of peak); Red Lake Peak 2651 Comment
  UC907731  Mimulus nanus var. mephiticus G. Thomas Robbins 1944-6-18 1732 El Dorado 1/2 mi n Capps Crossing (along Capps Crossing road) 1524 Comment
  JEPS7787  Mimulus nasutus G. Thomas Robbins 1953-5-8 3524 Calaveras 4.7 mi w, along Mokelumne Hill-Glencoe road Glencoe; Rich Gulch, Mokelumne Hill 457 Comment
  JEPS7791  Mimulus palmeri G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3545 Tulare 1/4 mi e Milo junction (on road to Balch Park, 7.5 mi n of Springville) 609 Comment
  RSA152171  Mimulus palmeri G. Thomas Robbins, L. R. Heckard 1953-5-30 3545 Tulare One fourth mile east of Milo junction and 7.5 miles north of Springville 610 Comment
  CAS-BOT-BC9650  Mimulus palmeri G. T. Robbins; L. R. Heckard 1953-5-30 3545 Tulare On road to Balch Park, one fourth mile east of Milo Junction and 7.5 miles north of Springville 609 Comment
  UC747101  Mimulus primuloides G. Thomas Robbins 1943-8-15 1345 El Dorado 2 1/2 mi ne Wrights Lake; Grouse Lake 2590 Comment
  UC747125  Mimulus primuloides G. Thomas Robbins 1945-8-12 2113 El Dorado 2-3 mi se Al Tahoe; Lake Valley 1920 Comment
  JEPS4659  Mimulus rubellus G. Thomas Robbins 1952-4-29 3477 San Bernardino between Mitchell Canverns and Gilroy Canyon (se slopes of mountains); Providence Mountains 1524 Comment
  SEINET3367731 Image available Mimulus rubellus G. Thomas Robbins 1944-7-30 1823 El Dorado Along Willow Flat Trail, 9 miles north of US Hwy 50, about 2 miles north of Wrights Lake 2286 Comment
  UC747119  Mimulus tilingii G. Thomas Robbins 1943-8-15 1342 El Dorado in bed of small inlet stream above Grouse Lake (2 1/2 mi ne of Wrights Lake) 2590 Comment
  UC747087  Mimulus torreyi G. Thomas Robbins 1943-7-6 1249 El Dorado 3 mi e Camino; C.C.C. Camp Snowline 1036 Comment
  RSA102189  Mimulus torreyi G. Thomas Robbins 1945-7-8 2060 El Dorado Along State Highway 89 near Fallen Leaf Lake. 1921 Comment
  JEPS19397  Mimulus tricolor G. Thomas Robbins 1938-5-19 264 Sonoma sw Santa Rosa (Stony Point Road, near The Lagunas) Comment
  JEPS7783  Mimulus viscidus var. compactus G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3563 Fresno 4.5 mi se of Auberry (Bald Mountain); Bald Mountain 914 Comment
  JEPS14534  Mimulus viscidus var. viscidus G. Thomas Robbins with Peter H. Raven 1956-4-28 3674 El Dorado 2.4 mi s: on burn along Placerville-Georgetown road, 1.5 mi n and on grade above South Fork American River Kelsey 457 Comment
  UC907706  Mimulus viscidus var. viscidus G. Thomas Robbins 1945-6-30 2014 El Dorado 1 mi n Rescue (along Deer Valley Rd) 396 Comment
  RSA102190  Mimulus viscidus var. viscidus G. Thomas Robbins 1945-6-30 2014 El Dorado Along Deer Valley Road, 1 mi. n. of Rescue. 396 Comment
  CAS-BOT-BC174681  Minuartia cismontana G. Thomas Robbins 1943-4-28 1043 El Dorado At Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC746830  Minuartia douglasii G. Thomas Robbins 1944-5-21 1623 El Dorado near Eight Mile House (about 2 mi e of Camino); North Fork Webber Creek 914 Comment
  CAS-BOT-BC388590  Minuartia douglasii G. Thomas Robbins 1944-5-21 1623 El Dorado On ridge above North Fork Webber Creek near Eight Mile House, about 2 mi/ e. of Camino 914 Comment
  CAS-BOT-BC174760  Minuartia nuttallii var. gracilis G. Thomas Robbins 1945-8-12 2130 El Dorado Near summit of Freel Peak 3322 Comment
  UC747347  Mitella breweri G. Thomas Robbins 1943-6-27 1224 El Dorado near Echo Summit Pass 2286 Comment
  RSA32399  Mitella breweri G. Thomas Robbins 1945-7-8 2053 El Dorado Along Velma Lakes Trail. Above Eagle Lake. Desolation Valley Wilderness Area. 2287 Comment
  RSA32406  Mitella breweri G. Thomas Robbins 1943-6-27 1224 El Dorado Near Echo Summit Pass. 2287 Comment
  JEPS4643  Mohavea breviflora G. T. Robbins and Rimo Bacigalupi with L. Constance, George Gillett and L. R. Heckard 1952-5-1 3503 Inyo Death Valley National Monument, Titus Canyon Titus Canyon; Death Valley National Monument, Titus Canyon 1066 Comment
  UCD99651  Mollugo verticillata G. Thomas Robbins; Robert Ornduff, Howard Whisler 1959-10-25 4171 San Joaquin on the surface of the dried stream bed of Duck Creek, along State Highway 4, 1/2 mile west of Stanislaus Co. line, 3.5 miles east of Farmington; in the first low, rolling foothills of the Sierra Nevada. 42 Comment
  CAS-BOT-BC219956  Monardella breweri subsp. lanceolata G. Thomas Robbins 1943-7-6 1244 El Dorado At C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  SEINET3996185 Image available Monardella breweri subsp. lanceolata C. Thomas Robbins 1943-7-6 1244 El Dorado CCC Camp Snowline, 3 miles east of Camino 1036 Comment
  UC747583  Monardella breweri subsp. lanceolata G. Thomas Robbins 1943-7-6 1244 El Dorado At C. C. C. Camp Snowline, 3 mi E of Camino 1036 Comment
  SEINET3996528 Image available Monardella odoratissima G. Thomas Robbins 1943-7-25 1331 El Dorado ca. 1 mi S of Echo Lake Comment
  UC747581  Monardella odoratissima subsp. pallida G. Thomas Robbins 1943-7-25 1331 El Dorado About 1 mi south of Echo Lake 2194 Comment
  RSA32361  Monardella odoratissima subsp. pallida G. Thomas Robbins 1943-7-25 1331 El Dorado Shady Red Fir woods along roadside about 1 mi. S of Echo Lake 2195 Comment
  CAS-BOT-BC220214  Monardella sheltonii G. Thomas Robbins 1943-7-6 1245 El Dorado At C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  GH400634  Monardella sheltonii G. T. Robbins 1943-7-6 1245 Unknown at C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  CAS-BOT-BC220164  Monardella sinuata subsp. nigrescens G. Thomas Robbins; S. Galen Smith 1958-7-8 3895 Marin Along Sir Francis Drake Highway, Point Reyes Peninsula, 2 miles north of junction of road to Drakes Beach Comment
  JEPS7798  Monolopia lanceolata G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3458 San Luis Obispo southernmost end of plain just before descent into Cuyama Valley (about 4 mi from Kern County line); Carrizo Plain 868 Comment
  OBI18738  Monolopia lanceolata G. Thomas Robbins & Rimo Bacigalupi, Rimo Bacigalupi 1952-4-20 3458 San Luis Obispo S most end of Carrizo Plain, just before descent into Cuyama Valley, abut 4 mi from Kern county line 869 Comment
  RSA152169  Monolopia lanceolata G. Thomas Robbins, Rimo Bacigalupi 1952-4-20 3458 San Luis Obispo Southernmost end of Carrizo Plain, just before descent into Cuyama Valley, about 4 miles from Kern County line 869 Comment
  JEPS4776  Monolopia major G. Thomas Robbins 1940-3-16 282 Alameda near Alameda-San Joaquin Co. line; Corral Hollw 259 Comment
  UC1084430  Monolopia major G. Thomas Robbins 1940-3-16 282 Alameda near Alameda-San Joaquin County lines; Corral Hollow 259 Comment
  JEPS8041  Monoptilon bellioides G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3486 Inyo 8.8 mi s Shoshone; McLain Park 426 Comment
  JEPS7969  Montia fontana G. Thomas Robbins, Peter H. Raven 1954-7-27 3637 Tulare Sequoia National Park, Crabtree Meadows Crabtree Meadows; Sequoia National Park, Crabtree Meadows 3139 Comment
  CAS-BOT-BC444828  Montia fontana G. Thomas Robbins 1945-5-27 1962 El Dorado Along South Fork Webber Creek ca. 2 mi., e. of Newtown 762 Comment
  UC746848  Montia parvifolia G. Thomas Robbins 1944-6-18 1725 El Dorado along Camp Creek near road to Capps Crossing; Camp Creek 1219 Comment
  UC746854  Montia parvifolia G. Thomas Robbins 1944-7-30 1817 El Dorado about 1/4 mi w of Rockbound Pass (Desolation Valley Wilderness Area); Desolation Valley Wilderness Area 2590 Comment
  JEPS15550  Muhlenbergia filiformis G. Thomas Robbins with L. R. Heckard 1956-7-25 3707 Colusa in meadow along trail due s Snow Mt. East (skirting eastern base of ridge forming Snow Mt. West) 1981 Comment
  JEPS25104  Muilla maritima G. Thomas Robbins 1959-4-11 3979 Alameda field about 1/4 mi n west end of Depot Road (adjacent to (just e of) the American Salt Co. evaporating ponds along shore of bay, about 1 3/4 mi nw of Mt. Eden and 3/4 mi s of Russell); shore of San Francisco Bay 1 Comment
  UC1057459  Muilla maritima G. Thomas Robbins 1937-4-11 100 San Mateo near Spring Valley Lakes, along road to Woodside Comment
  JEPS7800  Muilla maritima G. Thomas Robbins and Rimo Bacigalupi 1952-4-25 3460 Kern along State Hwy near base of Pyramid Hills (s of Devils Den, near junction with Kern Co. route 116, nw corner of county) 146 Comment
  JEPS23885  Myosotis discolor G. Thomas Robbins 1937-5-23 198 Sonoma ca. 10 mi. w. Santa Rosa (marsh on Pitkin Ranch); Vine Hill region, Pitkin Ranch Comment
  UC747593  Myosotis discolor G. Thomas Robbins 1945-5-27 1963 El Dorado 3 - 4 mi. e. Newtown (meadow near S. Fork Webber Creek) 762 Comment
  CAS-BOT-BC101802  Myrica hartwegii G. Thomas Robbins 1945-6-17 1983 El Dorado along Camp Creek, near Baltic Peak 1036 Comment
  SBBG65096  Nama demissa J. R. and R. C. Robbins 1930-3-29 Los Angeles Antelope Valley Comment
  SD45202  Nama demissa var. demissa G. Thomas Robbins 1950-4-2 3308 Kern Red Rock Canyon near The Temple, ca. 1.0 mile south of Ricardo. 762 Comment
  RSA46772  Nasturtium officinale G. Thomas Robbins 1944-5-16 1610 El Dorado N Fork Webber Creek, 3 miles E of Camino 915 Comment
  JEPS16140  Navarretia atractyloides G. Thomas Robbins with John Dawson and Bob Ornduff 1956-10-6 3790 Monterey about 1 mi below U. S. Forest Service China Camp Ground (Miller Canyon (headwaters of Miller Fork of Carmel River)); Santa Lucia Range, Miller Canyon, Miller Fork of Carmel Rive 1158 Comment
  JEPS15007  Navarretia divaricata G. Thomas Robbins 1944-6-11 1672 El Dorado 203 mi ne Riverton (along Ice House Road) 1219 Comment
  UC913456 Image available Navarretia divaricata G. Thomas Robbins 1944-6-11 1672 El Dorado Ice House, 2-3 miles northeast of Riverton. Comment
  UC913462  Navarretia divaricata G. Thomas Robbins 1943-6-13 1162 -B El Dorado near Park Creek road jct with Plum Creek and Hazel Valley roads (along Park road) 1219 Comment
  UC913463  Navarretia divaricata subsp. vividior G. Thomas Robbins 1945-6-30 2015 El Dorado 0.1 mi n Rescue (along Deer Valley Road) 396 Comment
  JEPS15006  Navarretia filicaulis G. Thomas Robbins 1943-6-22 1209 El Dorado 3 mi e Placerville (at w edge of Institute Of Forest Genetics) 792 Comment
  SEINET197485  Navarretia filicaulis G. Thomas Robbins 1943-6-22 1209 El Dorado At eastern edge of Institute of Forest Genetics, 3 miles east of Placerville 792 Comment
  SEINET8729364 Image available Navarretia filicaulis G. Thomas Robbins 1943-1 1209 El Dorado At western edge of Institute of Forest Genetics, 3 miles east of Placerville Comment
  UC913409  Navarretia intertexta G. Thomas Robbins 1943-6-5 1126 El Dorado ca 3 mi e Camino (canyon slope above North Fork Webber Creek) 1005 Comment
  RSA77960  Navarretia intertexta G. Thomas Robbins 1943-6-2 1108 El Dorado East and above Smith Flat 762 Comment
  RSA98662  Navarretia intertexta G. Thomas Robbins 1943-6-5 1126 El Dorado Above North Fork Webber Creek, ca. 3 mi. E of Camino 1006 Comment
  RSA98663  Navarretia intertexta G. Thomas Robbins 1944-7-6 1760 El Dorado Sly Park, 5 mi. S of Pollock Pines 976 Comment
  UC913382  Navarretia intertexta subsp. propinqua G. Thomas Robbins 1945-9-24 2148 Lassen along Susanville to Pittville highway; Lassen National Forest 1737 Comment
  RSA84881  Navarretia leptalea G. Thomas Robbins 1943-7-18 1271 El Dorado Sly Park, along Pleasant Valley Road 915 Comment
  UC1008645  Navarretia leptalea subsp. leptalea G. Thomas Robbins 1944-7-30 1821 El Dorado about 2 mi n Wrights Lake (on rocky slope along Willow Flat trail); n of Wrights Lake, along Willow Flat trail 2438 Comment
  UC747613  Navarretia leptalea subsp. leptalea G. Thomas Robbins 1943-7-18 1271 El Dorado along Pleasant Valley Road near Sly Park; near Sly Park 914 Comment
  UC631637  Navarretia leucocephala subsp. bakeri G. Thomas Robbins 1937-5-23 186 Sonoma near Wright School Comment
  JEPS15701  Navarretia linearifolia subsp. linearifolia G. Thomas Robbins 1956-9-9 3755 Alpine 1/2 to 3/4 mi due w, above State Highway 88, lower southerly slopes of Red Lake Peak Carson Pass; lower, southerly slopes of Red Lake Peak 2651 Comment
  UCR143529  Navarretia prolifera G. Thomas Robbins 1943-6-13 1162 - El Dorado Sierra Nevada Mtns., along Park Creek Road near junction with Plum Creek and Hazel Valley roads (at General Land Office Survey Marker); extreme eastern boundary of Placerville [15'] Q. 1220 Comment
  SEINET8729369 Image available Navarretia prolifera G. Thomas Robbins 1943-1 1111 El Dorado At Civilian Conservation Corps Camp Snowline, 3 miles east of Camino, altitude 3400 feet. 1036 Comment
  SEINET8729371 Image available Navarretia prolifera G. Thomas Robbins 1943-1 1112 El Dorado Eddy Arboretum, Institute of Forest Genetics, 3 miles east of Placerville 823 Comment
  CAS-BOT-BC230529  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-3 1112 El Dorado Institute of Forest Genetics, 3 miles E of Placerville, Eddy Arboretum 822 Comment
  CAS-BOT-BC230531  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-2 1111 El Dorado At Civilian Conservation Corps Camp Snowline, 3 miles E of Camino 1036 Comment
  JEPS30773  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-3 1112 El Dorado about 3 mi e Placerville; Institute of Forest Genetics Arboretum 822 Comment
  JEPS6654  Navarretia prolifera subsp. lutea G. Thomas Robbins 1932-6-2 1111 El Dorado 3 mi e Camino (at Civilian Conservation Corps Camp Snowline) 1036 Comment
  RSA77957  Navarretia prolifera subsp. lutea G. Thomas Robbins 1944-6-14 1686 El Dorado Institute of Forest Genetics, 3 miles east of Placerville 823 Comment
  SEINET196556  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-3 1112 El Dorado Insitute of Forest Genetics, 3 miles E of Placerville. 823 Comment
  SEINET197486  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-2 1111 El Dorado Civilian Conservation Corps Camp Snowline, 3 miles east of Camino. Comment
  UC1008719  Navarretia prolifera subsp. lutea G. Thomas Robbins 1942-9-23 914 El Dorado 3 mi e Placerville (at Institute of Forest Genetics) 822 Comment
  UC913411  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-3 1112 El Dorado about 3 mi e Placerville (Eddy Arboretum, Institute of Forest Genetics) 822 Comment
  UC913472  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-2 1111 El Dorado 3 mi e Camino (at C.C.C. Camp Snowline) 1036 Comment
  RSA98664  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-13 1162 -a El Dorado Along Park Creek Road near jct with Plum Creek and Hazel Valley roads (at General Land Office Survey Marker); extreme eastern boundary of Placerville quad. 1220 Comment
  RSA98676  Navarretia prolifera subsp. lutea G. Thomas Robbins 1943-6-2 1111 El Dorado 3 miles east of Camino 1037 Comment
  CAS-BOT-BC233558  Navarretia prolifera subsp. prolifera G. Thomas Robbins 1944-7-6 1759 El Dorado Along Iron Mountain Road, about 0.5 mile NE of Sly Park 975 Comment
  JEPS8063  Navarretia pubescens G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3546 Tulare 5 mi nw Milo junction (slopes of Blue Ridge); Blue Ridge 731 Comment
  CAS-BOT-BC233597  Navarretia pubescens G. Thomas Robbins 1943-5-29 1104 El Dorado W edge, Institute of Forest Genetics, 3 miles E of Placerville 731 Comment
  JEPS8056  Navarretia pubescens G. Thomas Robbins and Lawrence R. Heckard 1953-5-29 3529 Santa Clara 9.4 mi e Hollister Junction (and w of summit of Pacheco Pass, slope above State Highway 152) 182 Comment
  RSA77956  Navarretia pubescens G. Thomas Robbins 1943-5-29 1104 El Dorado Institute of Forest Genetics, 3 miles east of Placerville. 732 Comment
  UCD48685  Navarretia squarrosa G. Thomas Robbins 1940-6-3 331 San Francisco Sandy waste places in Golden Gate Park, San Francisco, San Francisco County. Comment
  UC913408  Navarretia viscidula G. Thomas Robbins 1944-6-15 1691 El Dorado 2-3 mi e Placerville (along U.S. Highway 50) 762 Comment
  SEINET10464814  Nemacladus capillaris Robbins 1943-6-13 ROBBINS 1169 El Dorado Along Park Creek road west of its junction with the Plum Creek and Hazel Valley roads 1219 Comment
  UC907677  Nemacladus capillaris G. Thomas Robbins 1943-6-13 1169 El Dorado w of Park Creek rd junction with Plum Creek and Hazel Valley rds (along Park Creek rd) 1219 Comment
  SEINET10972228  Nemacladus glanduliferus var. orientalis Robbins 1952-4-27 ROBBINS 3472 San Bernardino On lava flow at south base of Mt. Pisgah Crater, about 14 miles west of Ludlow, Mojave Desert 640 Comment
  JEPS5244  Nemacladus orientalis G. Thomas Robbins with Lincoln Constance, George Gillett 1952-4-27 3472 San Bernardino 14 mi w Ludlow (s base of Mt. Pisgah Crater); Mojave Desert, Mt. Pisgah Crater 640 Comment
  SD51623  Nemacladus orientalis G. Thomas Robbins, Lincoln Constance, George Gillett 1952-4-27 3472 San Bernardino Southbase of Mount Pisgah Crater, Ca. 14 miles west of Ludlow, Mojave Desert 640 Comment
  JEPS7689  Nemacladus rubescens G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3428 San Bernardino about 10 mi e Cronese, Cronese Valley (along U.S. Highway 91); Mohave Desert 365 Comment
  SD51686  Nemacladus rubescens G. Thomas Robbins, R. Bacigalupi, L. Constance, et al. 1952-5-1 3488 A Inyo McLain Park, 8.8 miles south of Shoshone. 424 Comment
  SD51764  Nemacladus rubescens G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3428 San Bernardino Ca. 10 miles east of Cronese (Cronese Valley), along U. S. Highway 91, Mohave Desert. 365 Comment
  OBI20998  Nemacladus sigmoideus G. T. Robbins, G. T. Robbins 1954-5-31 4528 Kern At N end of Walker Basin, at crossing of rd to Havilah 1036 Comment
  JEPS7676  Nemacladus sigmoideus G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3488 C Inyo 8.8 mi s Shoshone; McLain Park 426 Comment
  UC698015  Nemophila heterophylla G. Thomas Robbins 1943-4-10 986 El Dorado 3 mi e Camino (Canyon slope of North Fork Webber Creek); North Fork Webber Creek, e of Camino 975 Comment
  UC698014  Nemophila heterophylla G. Thomas Robbins 1943-3-27 970 El Dorado western edge of Institute of Forest Genetics arboretum Institute of Forest Genetics arboretum 792 Comment
  UC747463  Nemophila heterophylla G. Thomas Robbins 1943-3-27 970 El Dorado above Smith Flat (near spring at western edge of Institute of Forest Genetics); western edge Institute of Forest Genetics, Smith Flat 792 Comment
  UC700282  Nemophila maculata G. Thomas Robbins 1943-6-13 1172 El Dorado ca 2 mi w Park Creek (along road to Park Creek); w of Park Creek 1219 Comment
  UC700316  Nemophila maculata G. Thomas Robbins 1945-4-22 1851 El Dorado 2 - 2 1/2 mi e Shingle Springs; e of Shingle Springs 457 Comment
  UC700319  Nemophila maculata G. Thomas Robbins 1944-6-17 1713 El Dorado along US Highway 50 ca 1 mi e Strawberry; e of Strawberry 1981 Comment
  UC747482  Nemophila maculata G. Thomas Robbins 1945-4-22 1851 El Dorado 2 - 2 1/2 mi e Shingle Springs; e of Shingle Springs 457 Comment
  UC747483  Nemophila maculata G. Thomas Robbins 1944-6-17 1713 El Dorado along US Highway 50 ca 1 mi e Strawberry; e of Strawberry 1981 Comment
  RSA32391  Nemophila maculata G. Thomas Robbins 1945-4-22 1851 El Dorado 2-2.5 miles east of Shingle Springs. 457 Comment
  UC1057474  Nemophila menziesii G. Thomas Robbins 1940-3-21 289 Sonoma 2-3 mi se Windsor (Pleasant Avenue Road and Chalk Hill Road); se of Windsor 91 Comment
  UC700287  Nemophila pedunculata G. Thomas Robbins 1943-4-1 978 El Dorado 3 mi e Camino (above North Fork Webber Creek); , e of Camino 1036 Comment
  UC747567  Nicotiana acuminata var. multiflora G. Thomas Robbins 1943-5-28 1094 El Dorado 3 mi e Placerville (immediately w of Institute of Forest Genetics) 762 Comment
  POM181662  Nicotiana glauca L. F. Robbins 1927-6-5 s.n. Yolo Near Winters. Comment
  JEPS7768  Nicotiana obtusifolia G. Thomas Robbins 1952-4-29 3478 San Bernardino s of and above Gilroy Canyon (e Mohave Desert); Mohave Desert, Providence Mountains Comment
  UC746857  Nuphar lutea subsp. polysepala G. Thomas Robbins 1943-9-5 1393 El Dorado 2-3 mi nw of Glen Alpine Springs (along Tahoe-Yosemite Trail); Tahoe-Yosemite Trail 2286 Comment
  UC1084399  Nuttallanthus texanus G. Thomas Robbins 1937-4-17 132 Contra Costa near Point Richmond Comment
  CAS-BOT-BC140163  Oemleria cerasiformis G. Thomas Robbins 1944-4-2 1493 El Dorado Above North Fork Webber Creek, ca. 3 mi. e. of Camino 914 Comment
  UC747263  Oemleria cerasiformis G. Thomas Robbins 1944-4-2 1493 El Dorado ca 3 mi e Camino (thickets above North Fork Webber Creek) 914 Comment
  UCSB2828  Oemleria cerasiformis Robbins, G. 1940-3-10 Contra Costa North slope of Grizzly Peak, Berkeley Hills 426 Comment
  JEPS21972  Oenanthe sarmentosa G. Thomas Robbins 1958-5-30 3845 Alameda ca. halfway between Mills College and Oak Knoll Naval Hospital Oakland (along Mountain Blvd.) 91 Comment
  UC1084460  Oenanthe sarmentosa G. Thomas Robbins 1937-6-5 222 Sonoma ca. 10 mi. w. Santa Rosa (Marsh on Pitkin Ranch, Vine Hill Region); Vine Hill region, Marsh on Pitkin Ranch Comment
  UCD106788  Oenothera californica W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  SBBG61311  Oenothera deltoides R. C. and J. R. Robbins 1933-2-16 Riverside Palm Springs-Indio Rd, near La Quinta Comment
  UC1084504  Oenothera deltoides subsp. howellii G. Thomas Robbins 1940-5-19 325 Contra Costa cliffs above river e Antioch; San Joaquin River Comment
  SD165174  Olea europaea Jolynn Robbins 2004-7-5 21 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  JEPS7978  Oreonana clementis G. Thomas Robbins and Peter H. Raven 1954-7-22 3627 Tulare n.e. side Mt. Guyot (a short distance above timberline, Sequoia Nat'l Park); Sequoia Nat'l Park, Mt. Guyot 3505 Comment
  UC747068  Orobanche bulbosa G. Thomas Robbins 1945-5-20 1929 El Dorado above Sweetwater Creek (near Simpson's Ranch) 182 Comment
  CAS-BOT-BC502756  Orobanche bulbosa G. Thomas Robbins 1945-5-27 1952 El Dorado Along Camino-Pleasant Valley road, about 1.5 mi N of Pleasant Valley 762 Comment
  JEPS7452  Orobanche cooperi G. Thomas Robbins, Rimo Bacigalupi 1952-4-19 3427 San Bernardino about 4 mi w of Baker (along U.S. Highway 91, Mohave Desert); Mohave Desert 335 Comment
  JEPS15583  Orobanche corymbosa subsp. corymbosa G. Thomas Robbins 1956-9-9 3753 Alpine Above State Highway 88, about one-half mile west of Carson Pass. Comment
  CAS-BOT-BC499856  Orobanche fasciculata G. Thomas Robbins 1944-5-24 1632 El Dorado Near eastern boundary of Institute of Forest Genetics, 3 mi E of Placerville 762 Comment
  CAS-BOT-BC502927  Orobanche ramosa G. Thomas Robbins; Rimo Bacigalupi 1955-9-26 3663 Alameda About 1/4 mi S of Lowry Rd and Alameda Creek, about 2 mi (air) SE of Alvarado Comment
  UC747029  Orobanche uniflora subsp. occidentalis G. Thomas Robbins 1944-5-21 1614 El Dorado On east-facing Canyon slope of North Fork Webber Creek, about 3 miles E of Camino. Comment
  UC747658  Orthilia secunda G. Thomas Robbins 1945-8-5 2092 El Dorado Lodgepole Pines near Rubicon Springs 1828 Comment
  JEPS15579  Orthocarpus cuspidatus subsp. cryptanthus G. Thomas Robbins 1956-9-9 3758 Alpine above State Highway 88, 1/2 to 3/4 of a mi due w Carson Pass (lower, southerly slopes of Red Lake Peak); southerly slopes Red Lake Peak, w of Carson Pass 2651 Comment
  RSA102191  Orthocarpus lithospermoides G. Thomas Robbins 1945-5-20 1921 El Dorado Along Placerville - Rescue Road. 3 mi E of Rescue. 457 Comment
  JEPS14589  Osmorhiza berteroi G. Thomas Robbins 1956-5-10 3691 Alameda grassy slope in park w of Life Sciences Building; Berkeley, University of California campus Comment
  JEPS15678  Osmorhiza berteroi G. Thomas Robbins 1956-9-14 3781 El Dorado along US Hwy 50 about 1/2 mi nw Echo Summit 2225 Comment
  UC746893  Oxyria digyna G. Thomas Robbins 1943-9-5 1375 El Dorado summit of Mt. Tallac 2956 Comment
  JEPS5161  Oxystylis lutea G. T. Robbins and Rimo Bacigalupi with L. R. Heckard 1952-5-1 3483 San Bernardino ca. 10 mi. s. Ibex Pass summit (along CA Hwy. 127, near crossing over Amargosa R.) Comment
  UC964809  Paeonia californica G. Thomas Robbins 1950-5-14 3354 Monterey slope above CA Hwy 1 about 5 mi s Hunter Light (between Lucia and Big Sur) 152 Comment
  UCD134899  Palafoxia arida W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS19004  Panicum miliaceum G. Thomas Robbins 1957-10-19 3807 Alameda on Addison St. near the corner Milvia St.; Berkeley Comment
  JEPS22011  Parapholis incurva G. Thomas Robbins 1958-6-14 3869 Alameda sw Newark (near the end of Willow Road along the road leading w to Plummer Landing) 3 Comment
  UC907634  Parapholis incurva G. Thomas Robbins with J. T. Howell 1945-5-9 1888 Marin about 1/2 mi n Ignacio 0 Comment
  UCD88681  Parapholis incurva G. Thomas Robbins 1958-6-14 3869 Alameda near the end of Willow Road, along the road leading west to Plummer Landing, southwest of Newark. 3 Comment
  RSA505366  Paspalum dilatatum G. Thomas Robbins 1955-7-15 5299 Glenn U. S. Highway 99W, 7.5 miles south of Orland, 1.5 miles north of Artois 52 Comment
  JEPS25270  Paspalum distichum G. Thomas Robbins 1959-9-6 4157 Alameda in the bed of Alameda Creek on West Alquire Road near Valle Vista Bridge (1.6 mi sw of Mission Blvd. (State Highway 9)); sw of Mission Bay, bed of Alameda Creek Comment
  UCD81571  Paspalum distichum W. W. Robbins 1927-10-1 837 Sacramento Walnut Grove. Comment
  UCD134921  Pectis papposa var. papposa W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS8060  Pectocarya anisocarpa G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3450 San Luis Obispo 16 mi n-nw Kern County line; Elkhorn Plain 731 Comment
  SBBG79039  Pectocarya linearis subsp. ferocula R. C. and J. R. Robbins 1922-3-28 Santa Barbara Santa Cruz Island Comment
  SD185599  Pectocarya linearis subsp. ferocula Jolynn Robbins 2006-4-9 50 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UCD120143  Pectocarya platycarpa W. W. Robbins 1939-12-24 s.n. San Diego southeastern part of county. Comment
  UC1084353  Pedicularis densiflora G. Thomas Robbins 1937-3-25 10 Sonoma 8-10 mi e of Santa Rosa; Santa Rosa Creek Canyon Comment
  UC964850  Pellaea bridgesii G. Thomas Robbins 1943-7-25 1312 El Dorado above Tamarack Lake (along Desolation Valley trail) 2286 Comment
  UC747108  Penstemon heterodoxus G. Thomas Robbins 1943-7-25 1306 El Dorado about 2 mi nw Echo Lake (along Desolation Valley Trail); along Desolation Valley trail, nw of Echo Lake 2438 Comment
  JEPS25168  Penstemon newberryi var. newberryi G. Thomas Robbins 1959-6-10 4040 Siskiyou about one mi n of highway summit on U.S. 99 between Mt. Shasta and Weed (on w side of Black Butte); w side of Black Butte, btw Mt. Shasta (town) and Weed 1188 Comment
  JEPS15552  Penstemon purpusii G. Thomas Robbins with L. R. Heckard 1956-7-25 3709 Colusa above Dark Hollow Creek (a trib. of Middle Fork Stony Creek, along trail due s of Snow Mt. East, at lower edge of cirque between Snow Mt. West and Snow Mt. East); Snow Mt. East, Dark Hollow Crk trib. Middle Fork Stony Creek 1981 Comment
  SBBG66609  Penstemon roezlii J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  SBBG66520  Penstemon speciosus R. C. Robbins 1932-7-18 El Dorado W side of Lake Tahoe Comment
  SD187812  Peritoma arborea var. arborea Jolynn Robbins 2006-4-9 36 San Diego Damon Lane County Park in south El Cajon. N of the intersection of Fury Ln and Wieghorst Way. 68 Comment
  UCD134913  Perityle emoryi W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD99524  Persicaria lapathifolia W. W. Robbins; S. W. Winter Date Unknown 782 Sutter Sutter Basin. Comment
  UCD117312  Petalonyx thurberi W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  SBBG65069  Phacelia J. R. and R. C. Robbins 1930-3-29 Los Angeles Antelope Valley Comment
  JEPS25156  Phacelia californica G. Thomas Robbins with John Weiler 1959-5-23 4027 Contra Costa flats on w side San Francisco Bay, Richmond, Brooks Island Comment
  UC1084364  Phacelia californica G. Thomas Robbins 1937-3-26 28 Sonoma w Bodega (along hwy to Bodega Bay) Comment
  OBI13844  Phacelia californica G. Thomas Robbins, John Weiler 1959-5-23 4027 Contra Costa On W side of Brooks Island, San Francisco Bay, Richmond Comment
  JEPS21994  Phacelia ciliata var. ciliata G. Thomas Robbins 1958-4-19 3815 Alameda field along Depot Rd just e junction with Clawiter Rd. (about 1/6 mi n of Mt. Eden Sta.) 7 Comment
  JEPS7465  Phacelia ciliata var. ciliata G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3452 San Luis Obispo 23.5 mi n Kern County line; Elkhorn Plain 731 Comment
  OBI13839  Phacelia ciliata var. ciliata G. Thomas Robbins 1958-4-19 3815 Alameda Along Depot Rd, just e of jctn of Clawiter Rd and about 1/6 mi N of Mt Eden Sta 8 Comment
  UCD120424  Phacelia distans L. F. Robbins 1929-3-27 s.n. Riverside Near Banning. Comment
  JEPS7466  Phacelia fremontii G. Thomas Robbins and Rimo Bacigalupi 1952-4-20 3449 San Luis Obispo 16 mi nnw Kern Co. line; Elkhorn Plain 731 Comment
  RSA152170  Phacelia fremontii G. Thomas Robbins, R. C. Bacigalupi 1952-4-20 3449 San Luis Obispo On Elkhorn Plain, 16 miles north-northwest of Kern county line. 732 Comment
  SBBG64932  Phacelia fremontii J. R. and R. C. Robbins 1930-3-28 Kern Kern Valley Comment
  SD45365  Phacelia fremontii G. Thomas Robbins 1950-4-7 3324 Inyo About 5 miles south of Lone Pine, in Larrea divaricata plain. 1067 Comment
  UC697977  Phacelia hastata subsp. compacta G. Thomas Robbins 1943-9-5 1377 El Dorado summit Mt. Tallac 2956 Comment
  UC700318  Phacelia hastata subsp. compacta G. Thomas Robbins 1945-7-8 2042 El Dorado near Al Tahoe; Lave Valley 1920 Comment
  UC747468  Phacelia hastata subsp. compacta G. Thomas Robbins 1943-9-5 1377 El Dorado near summit Mt. Tallac 2956 Comment
  UCD120600  Phacelia imbricata W. W. Robbins 1926-4-17 511 Nevada Grass Valley. Comment
  UC697976  Phacelia imbricata G. Thomas Robbins 1943-5-28 1095 El Dorado 3 mi e Placerville (w edge of Institute); Institute of Forest Genetics 762 Comment
  UC747025  Phacelia imbricata G. Thomas Robbins 1943-5-28 1095 El Dorado 3 mi e Placerville (w edge of Institute); Institute of Forest Genetics 762 Comment
  UC698045  Phacelia mutabilis G. Thomas Robbins 1943-6-7 1134 El Dorado slope above river near China Flat (Sacramento Box Sawmill) (ca 4 mi s of Kyburg); Silver Fork American River 1371 Comment
  UC697960  Phacelia mutabilis G. Thomas Robbins 1943-7-25 1311 El Dorado along Desolation Valley trail above Tamarack Lake 2286 Comment
  JEPS8069  Phacelia purpusii G. Thomas Robbins and Lawrence R. Heckard 1953-5-31 3555 Tulare along State Hwy 65 0.6 mi sw Badger 914 Comment
  UC700284  Phacelia purpusii G. Thomas Robbins 1945-6-23 2007 El Dorado ca 3 mi e Camino (canyon slope above creek); North Fork Webber Creek 975 Comment
  UC701990  Phacelia quickii G. Thomas Robbins 1946-1 1707 Alameda in greenhouse Berkeley Comment
  GH401023  Phacelia ramosissima G. T. Robbins 1945-8-12 2141 Unknown slopes west of High Meadow along trail to Freel Peak, SW of Lake Tahoe 2286 Comment
  CAS-BOT-BC154394  Phacelia ramosissima var. eremophila G. Thomas Robbins 1944-7-28 1787 El Dorado along Willow Flat Trail ca. 1/4 mi. w. of Rockbound Pass 2438 Comment
  CAS-BOT-BC154392  Phacelia ramosissima var. eremophila G. Thomas Robbins 1945-8-12 2141 El Dorado west of High Meadow along trail to Freel Peak, SE of Lake Tahoe 2286 Comment
  CAS-BOT-BC154393  Phacelia ramosissima var. eremophila G. Thomas Robbins 1944-7-28 1772 El Dorado along Willow Flat Trail at Willow Flat, ca. 3 mi. NE of Wrights Lake 2286 Comment
  JEPS15697  Phacelia ramosissima var. montereyensis G. Thomas Robbins 1956-9-9 3760 Alpine above State Hwy 88 1/2 to 3/4 mi due w Carson Pass (lower s slopes of mt.); Red Lake Peak 2651 Comment
  UC700286  Phacelia ramosissima var. ramosissima G. Thomas Robbins 1944-7-28 1787 El Dorado along Willow Flat Trail ca 1/4 mi w Rockbound Pass 2438 Comment
  UC700301  Phacelia ramosissima var. ramosissima G. Thomas Robbins 1944-7-28 1772 El Dorado ca 3 mi ne Wrights Lake (along Willow Flat Trail); Willow Flat 2286 Comment
  UC747478  Phacelia ramosissima var. ramosissima G. Thomas Robbins 1944-7-28 1787 El Dorado along Willow Flat Trail ca 1/4 mi w Rockbound Pass 2438 Comment
  UC700313  Phacelia ramosissima var. subglabra G. Thomas Robbins 1945-8-12 2141 El Dorado slopes w High Meadow (along trail to Freel Peak, sw of Lake Tahoe) 2286 Comment
  UC747466  Phacelia ramosissima var. subglabra G. Thomas Robbins 1945-8-12 2141 El Dorado slopes w High Meadow (along trail to Freel Peak, sw of Lake Tahoe) 2286 Comment
  SD45363  Phacelia vallis-mortae G. Thomas Robbins 1950-4-2 3305 Kern Along U.S. Highway 6 near and south of Freeman Junction, on Larrea divaricata plain. 1006 Comment
  UC907655  Phalaris lemmonii G. Thomas Robbins with J. T. Howell 1945-5-9 1875 Marin 1/2 mi n Hamilton Field Air Base; n of Hamilton Field Air Base 0 Comment
  UC907648  Phleum pratense G. Thomas Robbins 1944-7-6 1756 El Dorado 5 mi s Pollock Pines; Sly Park Meadow 1005 Comment
  UC747629  Phlox douglasii subsp. rigida G. Thomas Robbins 1943-7-25 1289 El Dorado above Medley Lakes (reservoir); Desolation Valley Wilderness Area 2590 Comment
  UC747603  Phlox speciosa G. Thomas Robbins 1944-5-28 1644 El Dorado 4-5 mi nw Pollock Pines (along road to powerhouse) 914 Comment
  JEPS7958  Phlox speciosa subsp. occidentalis G. Thomas Robbins 1953-5-8 3527 Calaveras 2.5 mis West Point (near Sandy Gulch) 792 Comment
  UC1008644  Phlox speciosa subsp. occidentalis G. Thomas Robbins 1943-6-20 1203 El Dorado 4-5 mi nw Pollock Pines (along road to powerhouse) 914 Comment
  RSA114104  Phlox speciosa subsp. occidentalis G. Thomas Robbins 1944-5-28 1644 El Dorado Along road to powerhouse, 4 to 5 miles northwest of Pollock Pines 915 Comment
  CAS-BOT-BC135135  Phoradendron juniperinum G. Thomas Robbins 1944-10-27 1836 El Dorado at Institute of Forest Genetics, 3 mi E of Placerville 822 Comment
  GH355049  Phoradendron juniperinum G. T. Robbins 1945-8-5 2096 Unknown along Georgetown Road, 4-5 miles east of Wentworth Springs 1981 Comment
  SEINET3857118  Phoradendron juniperinum G. Thomas Robbins 1945-8-5 2096 El Dorado Along Georgetown Road, 4-5 miles E of Wentworth Springs 1981 Comment
  UC746873  Phoradendron juniperinum G. Thomas Robbins 1945-8-5 2096 El Dorado 4 - 5 mi. e. Wentworth Springs (along Georgetown Rd.) 1981 Comment
  GH355064  Phoradendron juniperinum var. libocedri G. T. Robbins 1944-10-27 1836 Unknown Institute of Forest Genetics 3 miles east of Placerville 822 Comment
  UC746881  Phoradendron libocedri G. Thomas Robbins 1944-10-27 1836 El Dorado 3 mi. e. Placerville (Institute of Forest Genetics); Institute of Forest Genetics 822 Comment
  CAS-BOT-BC141256  Phoradendron serotinum subsp. tomentosum G. Thomas Robbins 1943-10-28 1404 El Dorado along US Highway 50, 3 mi E of Placerville 762 Comment
  UC746872  Phoradendron villosum G. Thomas Robbins 1943-10-28 1404 El Dorado along U.S. Hwy. 50 3 mi. e. Placerville 762 Comment
  RSA127372  Phoradendron villosum G. Thomas Robbins 1943-12-24 1465 Marin On Big Rock Ridge, ca 2 mi W of Hamilton Field Air Base. 457 Comment
  UCD81568  Phyla nodiflora var. reptans W. W. Robbins; W. D. Norton 1928-8-1 1422 Yolo near Clarksburg. Comment
  CAS-BOT-BC140542  Physocarpus capitatus G. Thomas Robbins 1943-6-29 1238 El Dorado Along North Fork Webber Creek, ca. 3 mi. e. of Camino 914 Comment
  UC746994  Physocarpus capitatus G. Thomas Robbins 1943-6-29 1238 El Dorado ca 3 mi e of Camino (along N Fork Webber Creek) 914 Comment
  UC1101610  Pilularia americana G. Thomas Robbins and S. Galen Smith 1950-4-15 1905 Colusa Bear Valley Comment
  A246904  Pinus albicaulis G. T. Robbins 1944-7-29 1809 Unknown Summit of ridge connecting Red Peak and Silver Peak, Desolation Valley Wilderness Area 2743 Comment
  UC747602  Pinus albicaulis G. Thomas Robbins 1945-7-1 2027 El Dorado above Smith Lake about 3 mi e Wrights Lake; Crystal Range 2743 Comment
  CAS-BOT-BC78281  Pinus attenuata G. Thomas Robbins 1944-3-19 1490 El Dorado On ridges and slopes immediately south and east of South Fork American River 914 Comment
  UC747631  Pinus contorta subsp. murrayana G. Thomas Robbins 1943-6-27 1214 El Dorado ridge above Echo Summit Pass ca. 3/4 mi sw U.S. Highway 50 2438 Comment
  A246849  Pinus contorta var. murrayana G. T. Robbins 1943-6-27 1214 Unknown Ridge above Echo Summit Pass, ca. 3/4 mi. sw. of U.S. Highway 50 Comment
  SBBG10285  Pinus coulteri R. C. and J. R. Robbins 1921-1 Santa Barbara Zaca Cyn Comment
  UC747596  Pinus lambertiana G. Thomas Robbins 1943-6-20 1192 El Dorado near Pollock Pines (ca. 3 mi w of Forebay reservoir, along road to P. G. & E. power house) 975 Comment
  CAS-BOT-BC79009  Pinus ponderosa G. Thomas Robbins 1944-10-15 1834 El Dorado At C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  GH246887  Pinus ponderosa G. T. Robbins 1944-10-15 1834 Unknown At. C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  UC747621  Pinus ponderosa G. Thomas Robbins 1944-10-15 1834 El Dorado 3 mi e Camino (C. C. C. Camp Snowline) 1036 Comment
  NY62305  Pinus ponderosa G. T. Robbins 1944-10-15 1834 El Dorado This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  SEINET3353243 Image available Pinus ponderosa G. Thomas Robbins 1944-1 1834 El Dorado CCC Camp Snowline, 3 mi. e. of Camino 1036 Comment
  UC747597  Pinus sabiniana G. Thomas Robbins 1944-4-30 1572 El Dorado 3-4 mi ne of Newtown (ridge above South Fork Webber Creek) 914 Comment
  UC746956  Piperia unalascensis G. Thomas Robbins 1943-6-13 1159 El Dorado w of junction Plum Creek and Hazel Valley roads (along Park Creek Road) 1219 Comment
  UC1084390  Plagiobothrys bracteatus G. Thomas Robbins 1937-4-25 149 Contra Costa 2 mi e Alamo Comment
  UC907715  Plagiobothrys fulvus G. Thomas Robbins 1944-5-15 1602 El Dorado 3 mi e Placerville (on hillside near Institute of Forest Genetics) 762 Comment
  UCD120825  Plagiobothrys fulvus var. campestris W. W. Robbins 1926-4-17 531 Nevada Grass Valley. Comment
  UC1084415  Plagiobothrys nothofulvus G. Thomas Robbins 1937-4-11 102 San Mateo near Spring Valley Lakes (along road to Woodside) Comment
  UC747590  Plagiobothrys nothofulvus G. Thomas Robbins 1943-3-25 967 El Dorado 3 mi e Placerville (hillside near Institute of Forest Genetics) 762 Comment
  GH403978  Plagiobothrys reticulatus var. rossianorum G. T. Robbins 1945-5-9 1876 Unknown 1/2 mi. n. of Hamilton Field Air Base Comment
  GH420143  Plagiobothrys scouleri var. penicillatus G. T. Robbins 1945-6-17 2001 Unknown Sly Park, 5 mi. s. of Pollock Pines 1005 Comment
  UCSB5650  Plagiobothrys stipitatus Robbins, G. 1937-4-25 Contra Costa Along roadside; 2 miles east of Alamo Comment
  UC907712  Plagiobothrys tenellus G. Thomas Robbins 1944-5-7 1589 El Dorado bank along creek near Sly Park (5 mi s of Pollock Pines); Park Creek 1005 Comment
  JEPS22058  Plantago coronopus G. Thomas Robbins 1958-7-13 3899 Contra Costa n end Berrellesa Street, Martinez; Carquinez Strait Comment
  JEPS23265  Plantago coronopus G. Thomas Robbins with John Weiler 1959-8-5 4122 Monterey nw of Marina (around parking area at Marina Beach); Monterey Bay, Marina Beach 15 Comment
  JEPS23266  Plantago coronopus G. Thomas Robbins with John Weiler 1959-8-5 4124 Monterey about 1.7 mi s Carmel Highlands (2.7 mi n of Granite Canyon, along State Highway 1) 36 Comment
  JEPS6357  Plantago coronopus G. Thomas Robbins 1952-4-5 3412 Mendocino about 4 mi se Little River; Mendocino White Plains Comment
  UCD124404  Plantago coronopus G. Thomas Robbins 1952-4-5 3412 Mendocino about 4 miles southeast of Litte River, Mendocino White Plains. Comment
  UCD124405  Plantago coronopus G. Thomas Robbins; John Weiler 1959-8-5 4124 Monterey along state Highway 1, 2.7 miles north of Granite Canyon, about 1.7 miles south of Carmel Highlands. Comment
  JEPS14638  Plantago elongata G. Thomas Robbins 1955-6-9 3662 Alameda Berkeley Comment
  JEPS21229  Plantago elongata G. Thomas Robbins 1958-5-28 3840 Alameda Berkeley Comment
  JEPS21230  Plantago elongata G. Thomas Robbins 1958-5-28 3841 Alameda Berkeley Comment
  JEPS21231  Plantago elongata G. Thomas Robbins 1958-5-28 3842 Alameda Berkeley Comment
  JEPS21232  Plantago elongata G. T. Robbins 1958-5-29 3843 Alameda Berkeley Comment
  JEPS21239  Plantago elongata G. Thomas Robbins 1958-6-12 3862 Alameda Berkeley Comment
  JEPS21240  Plantago elongata G. Thomas Robbins 1958-6-12 3863 Alameda Berkeley Comment
  JEPS21241  Plantago elongata G. Thomas Robbins 1958-6-30 3885 Alameda Berkeley Comment
  JEPS23816  Plantago elongata G. Thomas Robbins 1959-4-11 3974 Alameda 0.75 mi s Russell (about 0.25 mi n of w end of Depot Road, just e of American Salt Co., about 1.75 mi w (and slightly n) of Mt. Eden Sta, shore of San Francisco Bay); San Francisco Bay 1 Comment
  JEPS22019  Plantago elongata G. Thomas Robbins with S. Galen Smith 1958-6-9 3860 San Mateo .12 mi w State Highway 1 (0.5 mi n of bridge crossing Pescadero Creek) Comment
  JEPS14637  Plantago erecta G. Thomas Robbins 1955-6-4 3660 Marin s shore Rodeo Lagoon Comment
  JEPS21979  Plantago erecta G. Thomas Robbins 1958-5-10 3830 Alameda e of Oakland (along Pinehurst Road, about 0.5 mi s of summit where the road makes a sharp descent into San Leandro Creek) 213 Comment
  JEPS21984  Plantago erecta G. Thomas Robbins 1958-5-9 3825 San Francisco w side Lake Merced Blvd. (just s of the pedestrian causeway on Lake Merced); San Francisco 7 Comment
  JEPS21985  Plantago erecta G. Thomas Robbins 1958-5-9 3825 San Francisco w side Lake Merced Blvd. (just s of the pedestrian causeway on the lake, along the w side of Lake Merced); San Francisco 7 Comment
  OBI11652  Plantago erecta G. Thomas Robbins 1958-5-9 3825 San Francisco Along the W side of Lake Merced Blvd. just S of the pedestrian causeway on the lake, San Francisco 8 Comment
  POM181672  Plantago erecta G. Thomas Robbins 1927-3-26 s.n. Yolo Canyon of Putah Creek. Comment
  UC747044  Plantago erecta G. Thomas Robbins 1945-4-22 1840 El Dorado 2-3 mi nw Shingle Springs 457 Comment
  JEPS21986  Plantago erecta G. Thomas Robbins 1958-5-9 3824 San Francisco 0.2 mi s Lake Merced Blvd. junction with Skyline Blvd. (opposite the Pacific Rod and Gun Club, along the w side of Lake Merced, sw of Lake Merced); San Francisco 7 Comment
  RSA152196  Plantago erecta G. Thomas Robbins 1958-5-9 3824 San Francisco Along the west side of Lake Merced Bld (opposite Pacific Rod and Gun Club), southwest of Lake Merced, 0.2 mile south of junction with Skyline Blvd, San Francisco. 8 Comment
  JEPS22023  Plantago lanceolata G. Thomas Robbins with S. Galen Smith 1958-6-2 3853 Contra Costa just e Hercules city boundary (Franklin Canyon Road (State Highway 4)); Refugio Valley 18 Comment
  JEPS22024  Plantago lanceolata G. Thomas Robbins with S. Galen Smith 1958-6-2 3852 Contra Costa just e Hercules city boundary (Franklin Canyon Road (State Highway 4)); Refugio Valley 18 Comment
  UCD124601  Plantago lanceolata Robbins; Raynor 1943-6-1 s.n. Plumas Belden. Comment
  UCD124602  Plantago lanceolata G. Thomas Robbins; S. Galen Smith 1958-6-2 3854 Contra Costa Along roadside just east of crossing of Hastings Slough on road between Port Chicago and Avon. 1 Comment
  JEPS23267  Plantago major G. Thomas Robbins with John Weiler 1959-8-7 4134 Monterey just below bridge crossing State Highway 1 (between Lopez Point and Cape San Martin, bank of Mill Creek); Mill Creek 12 Comment
  OBI11633  Plantago maritima G. Thomas Robbins 1958-5-31 3846 Marin This site was only about 10-15 yds from low, sandy clay bluffs where var. californica, see Robbins 3847, was collected. Above SW edge of Rodeo Lagoon Comment
  UCD124622  Plantago maritima G. Thomas Robbins 1953-8-29 3617 San Mateo Just south of the Olympic Golf Club and the San Francisco City and County line. Comment
  JEPS14368  Plantago maritima var. californica G. Thomas Robbins 1955-6-4 3655 Marin nw of Rodeo Lagoon Comment
  JEPS15530  Plantago maritima var. californica G. Thomas Robbins 1956-8-18 3736 San Mateo near mouth of Pomponio Creek Comment
  JEPS21970  Plantago maritima var. californica G. Thomas Robbins 1958-5-31 3847 Marin near sw edge of Rodeo Lagoon Comment
  JEPS22008  Plantago maritima var. californica G. Thomas Robbins 1958-6-9 3872 San Mateo about 0.5 mi s Pescadero Point (above the beach at Pebble Beach); Pebble Beach Comment
  JEPS21971  Plantago maritima var. juncoides G. Thomas Robbins 1958-5-31 3846 Marin sw edge Rodeo Lagoon Comment
  JEPS22064  Plantago maritima var. juncoides G. Thomas Robbins with S. Galen Smith 1958-7-8 3893 Marin about 300 yds sw Sir Francis Drake Highway (nw edge of Schooner Bay ( an arm of Drakes Estero), Point Reyes Peninsula); Point Reyes Peninsula, Drakes Estero, Schooner Bay Comment
  JEPS22065  Plantago maritima var. juncoides G. Thomas Robbins with S. Galen Smith 1958-7-8 3893 Marin about 300 yds sw Sir Francis Drake Highway (nw edge of Schooner Bay ( an arm of Drakes Estero), Point Reyes Peninsula); Point Reyes Peninsula, Drakes Estero, Schooner Bay Comment
  JEPS22091  Plantago maritima var. juncoides G. Thomas Robbins 1958-7-19 3903 Contra Costa about 0.75 mi s Pt. San Pablo, Potrero San Pablo, Richmond; San Francisco Bay, Pt. Orient Comment
  JEPS6472  Plantago ovata G. Thomas Robbins 1954-7-13 3619 Alameda Berkeley Comment
  SD51697  Plantago ovata G. Thomas Robbins, Rimo Bacigalupi 1952-4-18 3426 San Bernardino Just east of Baker. 280 Comment
  UCD124542  Plantago ovata var. fastigiata W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS22047  Plantago subnuda G. Thomas Robbins 1958-6-25 3880 Marin ne of Rodeo Lagoon; Fort Cronkhite Military Reservation 91 Comment
  UC565399  Plantago subnuda G. Thomas Robbins 1937-6-5 220 Sonoma Pitkin Ranch, Vine Hill region, about 10 miles west of Santa Rosa. Comment
  OBI11625  Plantago subnuda G. Thomas Robbins, John Weiler 1959-8-7 4136 Monterey Along State hwy 1, directly opp (E of) Cape San Martin, about 0.4 mi S of Willow Crk crossing, 2.5 mi S of Pacific Valley School 61 Comment
  OBI11649  Plantago subnuda G. Thomas Robbins 1958-6-25 3880 Marin Fort Cronkhite Military Reservation N of Rodeo Lagoon 91 Comment
  UC1057476  Platanthera leucostachys G. Thomas Robbins 1937-5-23 208 Sonoma about 10 mi w Santa Rosa (on Pitkin Ranch, Vine Hill region); Vine Hill Comment
  UC746957  Platanthera sparsiflora G. Thomas Robbins 1943-6-27 1225 El Dorado near Echo Summit Pass 2286 Comment
  UCSB2712  Platanus racemosa Robbins, G. 1940-3-16 Alameda bed of Corral Hollow Creek; near Tesla, at west end of Corral Hollow 213 Comment
  SBBG70057  Platystemon californicus R. C. and J. R. Robbins 1921-1 Santa Barbara Los Olivos Comment
  UC1057447  Platystemon californicus G. Thomas Robbins 1937-4-11 95 San Mateo along road to Woodside near Spring Valley Lakes; near Springs Valley Lakes Comment
  SBBG70056  Platystemon californicus J. R. and R. C. Robbins 1930-3-29 Los Angeles upper Antelope Valley Comment
  JEPS5139  Plectritis ciliosa subsp. ciliosa G. Thomas Robbins 1953-5-7 3515 C Calaveras about 2 mi s of Vallecito (on road to Columbia, on Table Mountain); Table Mountain 487 Comment
  UC747031  Plectritis ciliosa subsp. ciliosa G. Thomas Robbins 1943-4-21 1018 El Dorado at w edge of grounds of Institute of Forest Genetics Institute of Forest Genetics 731 Comment
  UC747039  Plectritis ciliosa subsp. ciliosa G. Thomas Robbins 1944-5-12 1596 El Dorado 3 mi e of Placerville ( w of Institute of Forest Genetics) 762 Comment
  JEPS14548  Plectritis macrocera G. Thomas Robbins with Peter H. Raven 1956-4-29 3687 El Dorado 1.2 mi nw of Somerset ((Youngs), canyon of North Fork Cosumnes River, near bridge); North Fork Cosumnes River Comment
  UC747043  Plectritis macrocera G. Thomas Robbins 1944-4-14 1529 Marin 3 mi w of Hamilton Field Air Base (near summit of Big Rock Ridge); Big Rock Ridge 304 Comment
  JEPS14274  Plectritis macrocera G. T. Robbins 3515 B Calaveras near Vallecito Comment
  JEPS7454  Pleuraphis rigida G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3431 San Bernardino along U.S. Highway 91 about one mi w Cronese, Cronese Valley; Mohave Desert 396 Comment
  JEPS7455  Pleuraphis rigida G. Thomas Robbins and Rimo Bacigalupi 1952-4-19 3432 San Bernardino along U.S. Highway 91 about one mi w Cronese (Cronese Valley); Mohave Desert 396 Comment
  UC747679  Pleuricospora fimbriolata G. Thomas Robbins 1943-6-20 1188 El Dorado 2-3 mi w of Pollock Pines (near head of Long Canyon) 975 Comment
  JEPS25103  Pleuropogon californicus G. Thomas Robbins 1959-4-11 3978 Alameda 1/4 mi n of west end of Depot Road (along shore of San Francisco Bay, adjacent to (just e of) the American Salt Co., about 1 3/4 mi nw Mt. Eden, about 3/4 mi s Russell); San Francisco Bay 1 Comment
  UC25113  Pleuropogon californicus G. Thomas Robbins with Hsuan Keng and Erika Amstutz 1959-4-3 3967 Sonoma ne of Santa Rosa (Rincon Valley, along Montecito Road, w of Middle Rincon Road); Rincon Valley 86 Comment
  UC907654  Pleuropogon californicus G. Thomas Robbins with J. T. Howell 1945-5-9 1874 Marin 1/2 mi n of Hamilton Field Air Base Comment
  UCD90172  Pleuropogon californicus var. californicus G. Thomas Robbins 1959-4-11 3978 Alameda About 1/4 mile north of the west end of Depot Road, adjacent to (just east of) the American Salt Co. Along the shore of San Francisco Bay, about 1 and 3/4 miles northwest of Mt. Eden and about 3/4 mile south of Russell. 1 Comment
  JEPS21996  Poa annua G. Thomas Robbins 1958-4-19 3813 Alameda ca 1/6 mi n Mt Eden Station (along Depot Rd, just e of junction of Clawiter Rd) 7 Comment
  UCD90379  Poa annua G. Thomas Robbins 1958-4-19 3813 Alameda East of junction of Clawiter Rd. and about 1/6 mile north of Mt. Eden Sta. 7 Comment
  JEPS25164  Poa howellii G. Thomas Robbins 1959-5-27 4036 Alameda w. shore Lake Temescal (reservoir); Oakland, Lake Temescal 137 Comment
  UCD91947  Poa pratensis Robbins; Raynor 1943-6-1 s.n. Plumas Quincy. Comment
  UC907652  Poa pratensis subsp. pratensis G. Thomas Robbins 1945-6-17 1999 El Dorado 5 mi s Pollock Pines (Sly Park) 1005 Comment
  UC907633  Poa secunda subsp. secunda G. Thomas Robbins 1945-6-17 1990 El Dorado near Baltic Peak (above Camp Creek) 1066 Comment
  UC964808  Poa secunda subsp. secunda G. Thomas Robbins 1950-4-2 3302 Kern ca 1 mi ne Isabella (above Kern River) 762 Comment
  UC701973  Podistera nevadensis G. Thomas Robbins 1945-8-12 2124 El Dorado Freel Peak; rocky slopes near summit 3322 Comment
  JEPS8284  Pogogyne douglasii G. Thomas Robbins and Lawrence L. Heckard 1953-6-1 3571 Madera 2.7 miles east of Raymond along road to Coarsegold 274 Comment
  SBBG58184  Polemonium californicum J. R. and R. C. Robbins 1932-7-16 Tuolumne Tioga Pass Rd Comment
  CAS-BOT-BC231319  Polemonium pulcherrimum G. Thomas Robbins 1943-9-5 1383 El Dorado Near summit of Dicks Peak; Desolation Valley Wilderness Areas 3048 Comment
  CAS-BOT-BC167567  Polygala cornuta var. cornuta G. Thomas Robbins 1943-7-8 1254 El Dorado At C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  JEPS22106  Polygala cornuta var. cornuta G. Thomas Robbins with H. G. Baker, G. Newcomb, and R. Ornduff 1958-7-30 3916 Tuolumne near Mountain Lily Mine (slopes above creek, 1.5 mi s of Italian Bar); Fivemile Creek (a tributary of South Fork Stanislaus River) 472 Comment
  UC747313  Polygala cornuta var. cornuta G. Thomas Robbins 1943-5-29 1103 El Dorado hillside near Institute of Forest Genetics (3 mi e of Placerville) 762 Comment
  UC747315  Polygala cornuta var. cornuta G. Thomas Robbins 1943-7-8 1254 El Dorado 3 mi e Camino; C.C.C. Camp Snowline 1036 Comment
  CAS-BOT-BC170369  Polygala cornuta var. cornuta G. Thomas Robbins; H. G. Baker; G. Newcomb; R. Ornduff 1958-7-30 3916 Tuolumne On openly wooded slope above Fivemiel Creek, a tributary of South Fork Stanislaus River, near Mountain Lily Mine, 1.5 miles southwest of Italian Bar 472 Comment
  JEPS22110  Polygonum amphibium var. emersum G. Thomas Robbins 1958-8-9 3920 Alameda small stream crossing Boyce Rd 0.1 mi n road junction to Newark Substation (of P.G. & E.) (about 3 mi sw of Newark) Comment
  UC746894  Polygonum bistortoides G. Thomas Robbins 1943-8-15 1350 El Dorado at edge of creek below Grouse Lake (2 1/2 mi ne of Wrights Lake); Grouse Creek 2590 Comment
  JEPS25019  Polygonum lapathifolium G. Thomas Robbins 1958-10-4 3943 Alameda about equidistant between the Eastshore Freeway and Oakland Municipal Airport (along Hegenberger Rd); Oakland Comment
  CAS-BOT-BC418614  Polygonum majus G. Thomas Robbins 1944-6-27 1739 El Dorado On top of ridge above North Fork Webber Creek, ca. 3 mi. e. of Camino 975 Comment
  CAS-BOT-BC418549  Polygonum minimum G. Thomas Robbins 1944-7-30 1822 El Dorado Along Willow Flat Trail, about 2 mi. n. of Wrights Lake, 9 mi. n. of U.S. Highway 50 2286 Comment
  JEPS15702  Polygonum minimum G. Thomas Robbins 1956-9-8 3752 El Dorado about 1/2 mi ne Wrights Lake 2133 Comment
  UC1084494  Polygonum paronychia G. Thomas Robbins 1940-5-15 315 San Francisco vicinity Rivera Street and 28th Avenue; San Francisco, Sunset District Comment
  UC746896  Polygonum phytolaccifolium G. Thomas Robbins 1944-7-28 1774 El Dorado Willow Flat Trail 3-4 mi ne Wrights Lake; Willow Flat 2286 Comment
  CAS-BOT-BC411424  Polygonum shastense G. Thomas Robbins 1945-8-12 2117 El Dorado slopes on western flank of Jobs Sister Peak 3048 Comment
  GH364805  Polygonum shastense G. T. Robbins 1945-8-12 2117 Unknown Gravelly slopes on western flank of Jobs Sister Peak 3048 Comment
  JEPS15683  Polygonum shastense G. Thomas Robbins 1956-9-10 3776 Alpine along trail between Winnemucca Lake and Elephants Back (1 1/2 to 2 mi airline s of Carson Pass) 2743 Comment
  SEINET3404079 Image available Polygonum spergulariiforme G. Thomas Robbins 1944-6-27 1739 El Dorado North Fork Webber Creek, 3 mi E of Camino Comment
  UC747643  Polypodium G. Thomas Robbins 1944-4-23 1557 El Dorado 5-6 mi n Camino (cliffs along S Fork American River) 762 Comment
  UC964855  Polypodium G. Thomas Robbins 1944-4-23 1557 El Dorado ca. 5 mi n of Camino (near Michigan-California Lumber Company RR tramway, canyon wall of S Fork American River); S Fork American River 762 Comment
  UC747638  Polystichum imbricans subsp. imbricans G. Thomas Robbins 1945-6-17 1993 El Dorado near Baltic Peak (slope above Camp Creek) 1005 Comment
  UC747640  Polystichum imbricans subsp. imbricans G. Thomas Robbins 1944-6-7 1656 El Dorado ca. 3 mi e Camino (above N Fork Webber Creek) 914 Comment
  UC964857  Polystichum imbricans subsp. imbricans G. Thomas Robbins 1945-6-17 1993 El Dorado near Baltic Peak (above Camp Creek) 1005 Comment
  CAS-BOT-BC76759  Polystichum imbricans subsp. imbricans G. Thomas Robbins 1944-6-7 1656 El Dorado North Fork Weber Creek, ca. 3 miles E of Camino 914 Comment
  UCSB8319  Polystichum munitum Robbins, G. 1936-8-1 Humboldt Near Carlotta. Comment
  UC746964  Populus trichocarpa G. Thomas Robbins 1944-6-18 1730 El Dorado along North Fork Cosumnes River at Capps Crossing; along North Fork Cosumnes River at Capps Crossing 1524 Comment
  UC972349  Potamogeton natans G. Thomas Robbins 1951-7-30 3404 Fresno about 1 mi w Bear Creek (s and w of Hilgard Branch of Bear Creek) 2926 Comment
  CAS-BOT-BC141658  Potentilla flabellifolia G. Thomas Robbins 1944-7-29 1803 El Dorado along inlet stream above Lake Schmidell, Desolation Valley Wilderness Area 2590 Comment
  UC907622  Potentilla flabellifolia G. Thomas Robbins 1944-7-29 1803 El Dorado above Lake Schmidell (along inlet stream); Desolation Valley Wilderness Area 2590 Comment
  UC907623  Potentilla gracilis var. fastigiata G. Thomas Robbins 1944-6-18 1714 El Dorado 5 mi s Pollock Pines (in Sly Park Meadow); s of Pollock Pines, in Sly Park Meadow 1005 Comment
  CAS-BOT-BC539984  Potentilla gracilis var. fastigiata G. Thomas Robbins 1944-6-18 1714 El Dorado Sly Park meadow, 5 mi. s. of Pollock Pines 1005 Comment
  CAS-BOT-BC143283  Potentilla grayi G. Thomas Robbins 1944-7-29 1804 El Dorado Above Lake Schmidell, Desolation Valley Wilderness Area 2590 Comment
  UC747005  Potentilla grayi G. Thomas Robbins 1943-8-15 1343 El Dorado 2 1/2 mi ne Wrights Lake (edge of Grouse Lake); , ne of Wrights Lake 2438 Comment
  UC907624  Potentilla grayi G. Thomas Robbins 1944-7-29 1804 El Dorado above Lake Schmidell; Desolation Valley Wilderness Area, above Lake Schmidell 2590 Comment
  CAS-BOT-BC143284  Potentilla grayi G. Thomas Robbins 1943-8-15 1343 El Dorado At the edge of Grouse Lake, 2 1/2 mi. NE of Wrights Lake 2438 Comment
  JEPS25023  Primula suffrutescens G. Thomas Robbins 1948-8-7 3180 Madera Volcanic Ridge along trail to Iceberg Lake (Mt. Dana - Minarets Wild ARea); Mt. Dana-Minarets Wild Area, trail to Iceberg Lake 3048 Comment
  UCD122132  Proboscidea louisianica subsp. louisianica W. W. Robbins 1932-6-27 s.n. Yolo University Farm, Davis. Comment
  JEPS23820  Proboscidea lutea G. Thomas Robbins 1959-8-1 4114 Contra Costa roadside berm of frontage road just s Mt. Diablo Blvd. ((about 0.5 mi e of concrete bridge at Charles Hill and about 0.2 mi w of jct. of Hidden Valley Rd.), 2 mi w of Lafayette) 144 Comment
  JEPS23821  Proboscidea lutea G. Thomas Robbins 1959-8-1 4114 Contra Costa roadside berm of frontage road just s Mt. Diablo Blvd. ((about 0.5 mi e of concrete bridge at Charles Hill and about 0.2 mi w of jct. of Hidden Valley Rd.), 2 mi w of Lafayette) 144 Comment
  JEPS84884  Proboscidea lutea G. Thomas Robbins 1959-8-1 4114 Contra Costa roadside berm of frontage road just s Mt. Diablo Blvd. ((about 0.5 mi e of concrete bridge at Charles Hill and about 0.2 mi w of jct. of Hidden Valley Rd.), 2 mi w of Lafayette) 144 Comment
  UCSB664  Prosartes hookeri Robbins, G. 1937-4-4 Alameda Strawberry Creek, w of Berkeley Comment
  UC1084462  Prunella vulgaris var. lanceolata G. Thomas Robbins 1937-6-5 225 Sonoma about 10 mi w Santa Rosa (Vine Hill region) Comment
  SBBG70941  Prunus andersonii R. C. Robbins 1930-3-27 Inyo Big Pine Crk Cyn 1524 Comment
  UC747252  Prunus emarginata G. Thomas Robbins 1943-6-27 1227 El Dorado near Echo Summit Pass 2286 Comment
  UC747254  Prunus emarginata G. Thomas Robbins 1943-6-7 1138 El Dorado about 4 mi s of Kyburz (above Silver Fork American River near Sacramento Box Company sawmill (China Flat)) 1371 Comment
  SD45191  Prunus fremontii G. Thomas Robbins 1950-4-7 3330 Kern about 0.5 mile west of Walker Pass (store) along State Highway 178 1372 Comment
  CAS-BOT-BC154612  Prunus subcordata G. Thomas Robbins 1943-4-15 996 El Dorado On northwest slope of North Fork Webber Creek Canyon, ca. 3 mi. e. of Camino 1036 Comment
  UC746974  Prunus subcordata G. Thomas Robbins 1943-4-15 996 El Dorado 3 mi e of Camino (North Fork Webber Creek Canyon); North Fork Webber Creek Canyon 1036 Comment
  UC747257  Prunus subcordata G. Thomas Robbins 1944-4-14 1538 Marin low hills just W of Hamilton Air Force base 152 Comment
  UCD113516  Prunus subcordata W. W. Robbins 1926-4-17 529 Nevada Grass Valley. Comment
  GH346760  Prunus virginiana var. demissa G. T. Robbins 1944-5-15 1599 Unknown Institute of Forest Genetics, 3 miles east of Placerville 762 Comment
  UC746977  Prunus virginiana var. demissa G. Thomas Robbins 1944-5-15 1599 El Dorado West of Institute of Forest Genetics, about 3 miles E of Placerville. Comment
  SD45205  Psathyrotes ramosissima G. Thomas Robbins 1950-4-6 3318 Inyo Mosaic Canyon, Panamint Mountains, Death Valley National Monument. Comment
  SD185546  Pseudognaphalium beneolens Jolynn Robbins 2006-9-4 52 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  SD185551  Pseudognaphalium californicum Jolynn Robbins 2006-4-9 49 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  OBI16419  Pseudognaphalium californicum G. Thomas Robbins 1959-8-6 John Weiler Monterey Near Mule Cyn, along side rd leading E from state hwy 1 about 1.5 mi S of Pfeiffer-Big Sur State park 305 Comment
  UC747156  Pseudognaphalium luteoalbum G. Thomas Robbins with J. T. Howell 1945-5-9 1902 Marin near Hamilton Field Air Base Comment
  JEPS22112  Pseudognaphalium ramosissimum G. Thomas Robbins with S. Galen Smith 1958-7-8 3896 Marin along Sir Francis Drake Highway opposite and e of RCA Radio Station (1.5 mi s of crossing of Drakes Estero); Point Reyes Peninsula Comment
  JEPS25004  Pseudognaphalium ramosissimum G. Thomas Robbins 1958-8-31 3929 Alameda slope of road cut along Tunnel Road a short distance w Charing Cross Rd.; Oakland Hills 243 Comment
  JEPS25106  Pseudognaphalium stramineum G. Thomas Robbins 1959-4-25 3997 Alameda at western edge of Eastshore Highway just s Emeryville interchange (Powell St.) (along bay); San Francisco Bay, Emeryville Comment
  UC747141  Pseudognaphalium stramineum G. Thomas Robbins 1945-7-16 2072 El Dorado 3 mi e of Camino (in woods on canyon slope above North Fork Webber Creek) 914 Comment
  UCD81543  Pseudognaphalium stramineum W. W. Robbins; W. D. Norton 1928-8-1 1426 Yolo near Clarksburg. Comment
  CAS-BOT-BC357556  Pseudognaphalium stramineum G. Thomas Robbins 1945-7-16 2072 El Dorado Above North Fork Webber Creek, 3 mi. e. of Camino 914 Comment
  OBI16437  Pseudognaphalium stramineum G. Thomas Robbins 1959-4-25 3997 Alameda Along the shore of San Francisco Bay at the W edge of the Easthshore hwy, just S of the Emeryville interchange (Powell St), Emeryville Comment
  UCD135227  Pseudognaphalium stramineum G. Thomas Robbins 1959-4-25 3997 Alameda Along the shore of San Francisco Bay at the western edge of the Eastshore Highway, just south of the Emeryville interchange (Powell St.), Emeryville. Comment
  UC907768  Psilocarphus tenellus G. Thomas Robbins 1945-5-27 1950 El Dorado 1.5 mi s Camino (along Pleasant Valley road); North Fork Webber Creek Comment
  UCD108313  Psorothamnus emoryi W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UCD108369  Psorothamnus schottii W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747680  Pterospora andromedea G. Thomas Robbins 1943-6-20 1202 El Dorado along road to powerhouse, 4-5 mi NW of Pollock Pines. 914 Comment
  JEPS7942  Pterostegia drymarioides G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3497 Inyo Death Valley Nat'l Monument, Grapevine Mts., Titus Canyon 1524 Comment
  SEINET195479  Pteryxia terebinthina G. Thomas Robbins 1945-7-8 2047 El Dorado Near Al Tahoe Lake Tahoe. 1920 Comment
  SEINET195494  Pteryxia terebinthina G. Thomas Robbins 1944-7-30 1816 El Dorado Desolation Wilderness ; Above Lake Lois Rockbound Valley. 2591 Comment
  UC701977  Pteryxia terebinthina var. californica G. Thomas Robbins 1944-6-17 1710 El Dorado above US Highway 50, about 1 mi E of Pyramid Ranger Station 1676 Comment
  UC746908  Pteryxia terebinthina var. californica G. Thomas Robbins 1944-7-30 1816 El Dorado Lake Lois, Rockbound Valley, Desolation Valley Wilderness Area 2590 Comment
  UC747227  Pteryxia terebinthina var. californica G. Thomas Robbins 1945-7-8 2047 El Dorado near Al Tahoe, Lake Tahoe 1920 Comment
  RSA32300  Pteryxia terebinthina var. californica G. Thomas Robbins 1945-7-8 2047 El Dorado Near Al Tahoe, Lake Tahoe. 1921 Comment
  A345825  Purshia tridentata G. T. Robbins 1945-8-12 2144 Unknown along road to High Meadow, 6-8 mi. SE of Lake Tahoe 2133 Comment
  GH345824  Purshia tridentata G. T. Robbins 1945-7-8 2039 Unknown near Al Tahoe, Lake Tahoe 1920 Comment
  UC747006  Purshia tridentata var. tridentata G. Thomas Robbins 1945-7-8 2039 El Dorado near Al Tahoe; Lake Tahoe 1920 Comment
  CAS-BOT-BC460589  Pyrola aphylla G. Thomas Robbins 1943-6-20 1191 El Dorado Along road to PG&E Power House, 2--3 mi. W of Forebay reservoir (near Pollock Pines) 975 Comment
  CAS-BOT-BC466017  Pyrola picta G. Thomas Robbins 1945-8-4 2081 El Dorado On shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
  UC972341  Pyrrocoma apargioides G. Thomas Robbins 1951-8-2 3405 A Fresno upper end of French Canyon French Canyon 3200 Comment
  JEPS25078  Pyrrocoma racemosa var. racemosa G. Thomas Robbins 1958-10-25 3956 Alameda about 0.7 mi w Mt. Eden Station (along Depot Rd., and opposite Hayward Motorcycle Club) Comment
  CAS-BOT-BC362367  Pyrrocoma racemosa var. racemosa G. Thomas Robbins 1958-10-25 3956 Alameda Along Depot Rd., about 0.7 mile west of Mt. Eden Sta., and opposite Hayward Motorcycle Club Comment
  JEPS25081  Pyrrocoma racemosa var. racemosa G. Thomas Robbins 1958-10-19 3953 Alameda about 3 mi w Hayward (along First Ave at the w edge of Russell City, and about 1 mi e of the shore of San Francisco Bay) Comment
  OBI15559  Pyrrocoma racemosa var. racemosa G. Thomas Robbins 1958-10-19 3953 Alameda Along First Ave at the W edge of Russell City, about 3 mi W of hayward and about 1 mi E of the shore of San Francisco Comment
  UC1084391  Quercus agrifolia G. Thomas Robbins 1937-4-25 147 Contra Costa 2 mi e Alamo (on road to Mt. Diablo) Comment
  SACT002625  Quercus chrysolepis G. Robbins 1943-8-20 El Dorado Dry brushy slope near Institute. 3 miles from Placerville. Comment
  UC746856  Quercus chrysolepis G. Thomas Robbins 1943-8-20 1363 El Dorado 3 mi e Placerville (near Institute of Forest Genetics) 822 Comment
  A344327  Quercus douglasii G. T. Robbins 1943-10-28 1402 Unknown along U.S. Highway 50, 3 mi. e. of Placerville Comment
  UC746867  Quercus douglasii G. Thomas Robbins 1943-10-28 1402 El Dorado 2 mi e Placerville (along U.S. Highway 50) 762 Comment
  UC746860  Quercus durata G. Thomas Robbins 1945-5-20 1928 El Dorado above Sweetwater Creek (near Simpson's Ranch) 182 Comment
  UCD45918  Quercus durata var. durata Thomas Robbins 1945-5-20 1928 El Dorado Above Sweetwater Creek, near Simpson's Ranch, Eldorado County, California. Elevation 600 feet. 182 Comment
  UC1084449  Quercus garryana G. Thomas Robbins 1940-3-24 307 Sonoma ca 6 mi ne Santa Rosa; Rincon Ridge 167 Comment
  SEINET13953407 Image available Quercus garryana G. Thomas Robbins 1940-1 307 Sonoma Rincon Ridge ca. 6 mi ne of Santa Rosa 168 Comment
  GH344982  Quercus garryana var. breweri G. T. Robbins 1945-6-9 1976 Unknown Above North Fork Webber Creek, about 3 miles east of Camino 975 Comment
  UC1084354  Quercus kelloggii G. Thomas Robbins 1937-3-25 11 Sonoma 8-10 mi e Santa Rosa; Santa Rosa Creek Canyon Comment
  GH343509  Quercus vacciniifolia G. T. Robbins 1945-8-5 2090 Unknown slope above north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
  RSA46948  Quercus vacciniifolia G. Thomas Robbins 1945-8-5 2090 El Dorado Above north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area. 2012 Comment
  UC746863  Quercus vacciniifolia G. Thomas Robbins 1945-8-5 2090 El Dorado about n shore Rockbound Lake; Desolation Valley Wilderness Area, Rockbound Valley 2011 Comment
  UC746864  Quercus vacciniifolia G. Thomas Robbins 1943-6-27 1215 El Dorado ridge above Echo Summit Pass 2438 Comment
  UC746866  Quercus vacciniifolia G. Thomas Robbins 1943-7-25 1319 El Dorado along trail above e shore Upper Echo Lake 2286 Comment
  UC1084409  Quercus wislizeni G. Thomas Robbins 1937-4-11 112 San Mateo Wooded hillside above Redwood City Comment
  UC746862  Quercus wislizeni G. Thomas Robbins 1943-8-20 1362 El Dorado 2 mi e Placerville (ridge near Institute of Forest Genetics) 822 Comment
  SBBG67860  Rafinesquia neomexicana J. R. and R. C. Robbins 1930-3-26 San Bernardino NE Mojave Desert Comment
  JEPS15685  Raillardella argentea G. Thomas Robbins 1956-9-10 3774 Alpine 1.5 to 2.0 airline mi s Carson Pass (along trail between Winnemucca Lake and Elephants Back) 2743 Comment
  UC747443  Ranunculus alismifolius var. alismellus G. Thomas Robbins 1943-6-27 1222 El Dorado rocky ridge above Echo Summit Pass 2438 Comment
  RSA32398  Ranunculus alismifolius var. alismellus G. Thomas Robbins 1945-7-8 2050 El Dorado Along Velma Lakes trail, near Velma Lakes, Desolation Valley, Wilderness. 2439 Comment
  RSA32405  Ranunculus alismifolius var. alismellus G. Thomas Robbins 1943-6-27 1222 El Dorado Rocky ridge above Echo Summit Pass. 2439 Comment
  UC747385  Ranunculus alismifolius var. alismifolius G. Thomas Robbins 1945-7-1 2017 El Dorado on road about 4 mi s Wrights Lake (near Lyons Creek) 2042 Comment
  CAS-BOT-BC379447  Ranunculus alismifolius var. hartwegii G. Thomas Robbins 1945-7-1 2017 El Dorado near Lyons Creek on road about 4 mi S of Wrights Lake 2042 Comment
  CAS-BOT-BC379176  Ranunculus aquatilis var. aquatilis G. Thomas Robbins 1945-5-20 1942 El Dorado New York Creek, about 2.5 mi S of Salmon Falls 152 Comment
  UC747384  Ranunculus aquatilis var. capillaceus G. Thomas Robbins 1945-5-20 1942 El Dorado about 2 1/2 mi s Salmon Falls; New York Creek 152 Comment
  SEINET195473  Ranunculus bloomeri G. Thomas Robbins, JT Howell 1945-5-9 1886 Marin 1.5 mi N of Ignacio Comment
  POM312419  Ranunculus bongardii G. Thomas Robbins, S. Galen Smith 1950-4-15 1907 Colusa Colusa County: In wet mud and vernal pool, Bear Valley Comment
  JEPS22056  Ranunculus californicus G. Thomas Robbins 1958-3-20 3873 Alameda vacant lot opposite intersection of 6th Street and Dwight Way; Berkeley Comment
  UC1084358  Ranunculus californicus G. Thomas Robbins 1937-3-26 17 Sonoma meadow near Wright School (on hwy to Sebastopol) Comment
  POM268966  Ranunculus eschscholtzii G. Thomas Robbins 1944-7-29 1813 El Dorado Moist ground in shady hemlock fir woods on ridge betw Lake Lois and Lake Schmidell, Desolation Valley Wilderness. 2591 Comment
  UC1057436  Ranunculus lobbii G. Thomas Robbins 1937-3-26 18 Sonoma vernal pool near Wright School (on hwy to Sebastopol) Comment
  UC1101375  Ranunculus lobbii G. T. Robbins and S. Galen Smith 1950-3-11 1904 Marin ca 1 mi s Olema (vernal pool) Comment
  UCD96947  Ranunculus occidentalis W. W. Robbins 1926-4-17 514 Nevada Grass Valley. Comment
  UC747451  Ranunculus occidentalis G. Thomas Robbins 1943-3-27 969 El Dorado 3 mi e Placerville (w edge of Institute of Forest Genetics) 762 Comment
  UC1057477  Ranunculus orthorhynchus var. bloomeri G. Thomas Robbins 1937-5-23 209 Sonoma about 10 mi w Santa Rosa; Vine Hill region, Pitkin Ranch Comment
  UC1084417  Ranunculus pusillus G. Thomas Robbins 1937-5-23 181 Sonoma vernal pool near Wright School (between Santa Rosa and Sebastopol) Comment
  UC639127  Ranunculus pusillus G. Thomas Robbins 1937-5-23 181 Sonoma near Wright School (on hwy between Santa Rosa and Sebastopol, edge of vernal pool) Comment
  UC1084367  Raphanus sativus G. Thomas Robbins 1937-3-26 33 Sonoma along road to Bodega (just e of Bodega) Comment
  JEPS22040  Reseda luteola G. Thomas Robbins 1958-7-4 3889 Alameda about 1/4 mi s of East Creek Slough (at ne edge of San Leandro Bay, Oakland); Oakland, San Leandro Bay Comment
  UCD116489  Reseda luteola G. Thomas Robbins 1958-7-4 3889 Alameda At the NE edge of San Leandro Bay, about 1/4 mile S of East Creek Slough, Oakland. Comment
  UC746927  Rhamnus californica G. Thomas Robbins 1944-4-14 1539 Marin immediately w Hamilton Field Air Base 30 Comment
  CAS-BOT-BC55965  Rhamnus ilicifolia G. Thomas Robbins 1945-4-22 1849 El Dorado 2-3 mi. NW of Shingle Springs 457 Comment
  UC746926  Rhamnus ilicifolia G. Thomas Robbins 1944-4-23 1548 El Dorado near Slab Creek junction with South Fork American River (slope above Slab Creek) 609 Comment
  UCD112338  Rhamnus ilicifolia W. W. Robbins 1926-4-17 523 Nevada Grass Valley. Comment
  UC907666  Rhamnus purshiana G. Thomas Robbins 1932-6-5 1124 El Dorado about 3 mi e Camino (above North Fork Webber Creek) 1036 Comment
  A362990  Rhododendron columbianum G. T. Robbins 1943-7-25 1288 Unknown Common around shore of small lake on rocky slopes above eastern shore of Medley Lakes Reservoir, Desolation Valley Primitive Area 2590 Comment
  SBBG59924  Rhododendron neoglandulosum J. R. and R. C. Robbins 1932-7-16 Tuolumne Tuolumne Meadows Lodge Comment
  SBBG59935  Rhododendron occidentale J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin 2133 Comment
  UC1084452  Rhododendron occidentale G. Thomas Robbins 1937-5-23 204 Sonoma 10 mi w of Santa Rosa (Vine Hill Region, Pitkin Ranch); Vine Hill Region, Pitkin Ranch Comment
  CAS-BOT-BC200685  Rhus aromatica G. Thomas Robbins 1945-5-18 1916 El Dorado Above Smithflat 731 Comment
  GH347195  Rhus trilobata G. T. Robbins 1945-5-18 1916 Unknown on hillside above Smithflat 731 Comment
  UC747346  Ribes amarum G. Thomas Robbins 1943-6-20 1197 El Dorado 4-5 mi nw Pollock Pines (along road to powerhouse, n-facing canyon wall); South Fork American River 914 Comment
  UC747378  Ribes amarum G. Thomas Robbins 1943-4-20 1012 El Dorado ca. 3 mi e Camino; North Fork Webber Creek 1036 Comment
  UC747338  Ribes californicum G. Thomas Robbins 1945-5-5 1871 Marin 2-3 mi w Hamilton Field Air Base (valley flat at n foot of Big Rock Ridge); Big Rock Ridge 0 Comment
  A380137  Ribes cereum G. T. Robbins 1945-10-6 2149 Unknown rocky slope above shore of lake on summit of Crater Lake Mt., Lassen National Forest (sec. 23, T.32N, R.8E) 2194 Comment
  GH380078  Ribes cereum G. T. Robbins 1944-6-17 1702 Unknown about 1 mi. e. of Pyramid Ranger Station 1676 Comment
  UC747359  Ribes cereum G. Thomas Robbins 1945-10-6 2149 Lassen summit Crater Lake Mt. (above lake); Lassen National Forest 2194 Comment
  UC747387  Ribes cereum G. Thomas Robbins 1943-9-5 1376 El Dorado summit Mt. Tallac 2956 Comment
  JEPS15562  Ribes lobbii G. Thomas Robbins with L. R. Heckard 1956-7-25 3718 Colusa about 50 yards below summit Snow Mt. West (ridge between east and west peaks of Snow Mt.); Snow Mt. 2133 Comment
  A380620  Ribes nevadense G. T. Robbins 1944-6-17 1701 Unknown about 1 mi. e. of Pyramid Ranger Station 1676 Comment
  CAS-BOT-BC212338  Ribes nevadense G. Thomas Robbins 1944-4-23 1556 El Dorado Banks of South Fork American River, about 5 miles N of Camino 762 Comment
  UC747371  Ribes nevadense G. Thomas Robbins 1943-4-22 1023 El Dorado 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747380  Ribes nevadense G. Thomas Robbins 1943-6-27 1217 El Dorado ridge above Echo Summit Pass (about 3/4 mi s of U.S. Highway 50) 2438 Comment
  UCD102424  Ribes nevadense Robbins; Raynor 1943-6-1 s.n. Plumas Feather River Canyon near Virgilia. Comment
  UC747167  Ribes roezlii G. Thomas Robbins 1944-4-23 1565 El Dorado about 4 mi n Camino (along Chute Camp Road above river); South Fork American River 762 Comment
  UC747328  Ribes roezlii G. Thomas Robbins 1945-10-6 2150 Lassen near sw summit Crater Lake Mountain; Lassen National Forest 2194 Comment
  UCD102468  Ribes roezlii Robbins; Raynor 1943-6-1 s.n. Plumas Belden. Comment
  CAS-BOT-BC198978  Ribes roezlii var. roezlii G. Thomas Robbins 1943-3-28 973 El Dorado On canyon slope above South Fork American River, about 6 mi. N of Camino. 914 Comment
  UCSB2663  Ribes sanguineum var. glutinosum Robbins, G. 1937-4-4 Alameda Strawberry Creek Canyon; University of California Campus Comment
  CAS-BOT-BC168751  Ribes victoris G. Thomas Robbins 1944-4-14 1525 Marin Small stream on north slope of Big Rock Ridge, about 3 mi. w. of Hamilton Field Air Base 91 Comment
  SEINET195655 Image available Ribes viscosissimum G. T. Robbins 1945-7-1 2033 El Dorado Wrights Lake; along Twin Lakes trail 1-1.5 miles northeast of Wright's Lake nine miles north of US Hwy 50 2286 Comment
  UC747331 Image available Ribes viscosissimum G. Thomas Robbins 1945-7-1 2033 El Dorado 1-1 1/2 mi ne Wrights Lake (9 mi n of U.S. Highway 50); Twin Lakes trail 2286 Comment
  JEPS14591  Rigiopappus leptocladus G. Thomas Robbins with Peter H. Raven 1956-4-28 3679 El Dorado along Georgetown-Greenwood Road 2 mi w Greenwood (8.3 mi w of Georgetown) 502 Comment
  JEPS8067  Rigiopappus leptocladus G. Thomas Robbins, Lawrence R. Heckard 1953-5-31 3552 A Tulare on road to Eshom Valley 3.8 mi se Badger; just e of Sequoia National Forest boundary 1005 Comment
  UC1084381  Rorippa G. Thomas Robbins 1937-4-11 81 San Mateo along Skyline Boulevard near County Jail (s of San Francisco); s of San Francisco Comment
  UCD115244  Rorippa austriaca Robbins; Raynor 1943-6-1 s.n. Modoc Corporation Ranch in Likely. Comment
  CAS-BOT-BC146427  Rosa bridgesii G. Thomas Robbins 1944-6-3 1652 El Dorado Along U. S. Highway 50, 3 mi. e. of Camino 1036 Comment
  GH346015  Rosa gymnocarpa G. T. Robbins 1944-6-3 1651 Unknown along U.S. Highway 50, three miles east of Caminoa 1036 Comment
  SEINET195659  Rosa gymnocarpa G. Thomas Robbins 1944-6-3 1651 El Dorado Shady Ponderosa pine-White Fir woods along U. S. Highway 50, three miles east of Camino, 1036 Comment
  UC746996  Rosa gymnocarpa G. Thomas Robbins 1943-5-23 1079 El Dorado 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747255  Rosa woodsii var. ultramontana G. Thomas Robbins 1945-8-12 2146 El Dorado 6-8 mi. SE of Lake Tahoe 2133 Comment
  UCSB2928  Rubus parviflorus Robbins, G. 1937-5-16 Alameda North facing slope of Strawberry Creek Canyon, Berkeley Comment
  UC1084363  Rubus spectabilis G. Thomas Robbins 1937-3-26 26 Sonoma bank of creek along road e Bodega Bay; e of Bodega Bay Comment
  CAS-BOT-BC158729  Rubus ursinus G. Thomas Robbins 1945-6-17 1996 El Dorado Along Camp Creek near Baltic Peak 1036 Comment
  UCSB2947  Rubus ursinus Robbins, G. 1937-5-16 Alameda Strawberry Creek Canyon, Berkeley Hills, University of California Campus Comment
  UC1084377  Rumex acetosella G. Thomas Robbins 1937-4-11 74 San Mateo just s San Francisco (along Skyline Boulevard) Comment
  UCD101331  Rumex lacustris Robbins; Raynor 1943-6-1 s.n. Lassen Madeline. Comment
  UCD101404  Rumex persicarioides W. W. Robbins 1943-9-1 s.n. Unknown County unknown: Delta Region. Comment
  UCD101458  Rumex pulcher G. Thomas Robbins; John Weiler 1959-5-23 4032 Contra Costa About 1/2 mile east of Pt. San Pablo, overlooking San Pablo Bay, Richmond. 7 Comment
  JEPS22044  Rumex salicifolius var. crassus G. Thomas Robbins 1958-6-25 3883 Marin w end Rodeo Lagoon Comment
  JEPS21987  Rupertia physodes G. Thomas Robbins 1958-5-4 3823 Contra Costa along Pinehurst Road on slopes above Upper San Leandro Reservoir (in hills e of Oakland) 228 Comment
  OBI12751  Rupertia physodes G. Thomas Robbins 1958-7-6 3890 Contra Costa Along Pinehurst Rd, on slopes above Upper San Leandro Reservoir, about 1/4 mi N of Alameda Co line 229 Comment
  UC964835  Ruppia cirrhosa G. Thomas Robbins 1950-4-5 3312 Inyo Badwater; Death Valley National Monument -85 Comment
  CAS-BOT-BC445658  Sagittaria cuneata G. Thomas Robbins 1956-9-10 3765 Amador Just to the south of Carson Spur, along State Highway 88 2435 Comment
  CAS-BOT-BC445659  Sagittaria cuneata G. Thomas Robbins 1956-9-10 3765 Amador Just to the south of Carson Spur, along State Highway 88 2435 Comment
  CAS-BOT-BC445639  Sagittaria cuneata G. Thomas Robbins 1943-8-15 1337 El Dorado North of Wrights Lake 2286 Comment
  JEPS23208  Salicornia depressa G. Thomas Robbins 1959-7-12 4110 Alameda about 0.75 mi s Russell (about 1.75 mi w of Mt. Eden Station, about 0.25 mi n of w end of Depot Road, just e of the American Salt Company evaporating ponds); San Francisco Bay 1 Comment
  SD51813  Salicornia depressa G. Thomas Robbins 1959-6-12 4110 Alameda Saling depressions ca. 0.25 mile north of west end of Depot Road, just east of the American Salt Company evaporating ponds. Comment
  POM313498  Salicornia maritima G. Thomas Robbins 1959-7-12 4110 Alameda Saline depression about 0.25 mile N of west end of Depot Road, just E of the American Salt Company evaporating ponds, shore of San Francisco Bay, about 1.75 miles W of Mt. Eden Station and about 0.75 mile S of Russell. 2 Comment
  OBI17186  Salicornia rubra G. Thomas Robbins 1959-9-27 4167 Alameda Edge of San Francisco Bay, about 1/4 mi E of San Francisco Oakland Bay Bridge Toll Plaza, Oakland Comment
  JEPS22092  Salicornia virginica G. Thomas Robbins 1958-7-19 3904 Contra Costa about 0.75 mi s Pt. San Pablo, Potrero San Pablo, Richmond; San Francisco Bay, Point Orient Comment
  CAS-BOT-BC103472  Salix eastwoodiae G. Thomas Robbins 1945-7-1 2030 El Dorado on slope e. and above Island Lake, ca. 4 mi. NE of Wrights Lake, 9 mi. n. of U.S. Highway 50 2590 Comment
  UC746975  Salix eastwoodiae G. Thomas Robbins 1943-7-25 1295 El Dorado slopes above Medley Lakes (reservoir); Desolation Valley Wilderness Area 2590 Comment
  JEPS25075  Salix exigua G. Thomas Robbins 1959-2-23 3959 Alameda w San Lorenzo (along S. Pacific R.R. near w end of Lewelling Blvd., and along Lewelling Blvd. for ca. 1/4 mi e of R.R. tracks) 3 Comment
  OBI9849  Salix exigua G. Thomas Robbins 1959-2-23 3959 Alameda Along RR tracks (Southern Pacific) near W end of Lewelling Blvd and also along Lewelling Blvd for about 1/4 mi E of the RR tracks, W of San Lorenzo 3 Comment
  UC746965  Salix exigua var. hindsiana G. Thomas Robbins 1945-5-15 1906 El Dorado 1/2 mi e Smithflat (along R.R. right-of-way) Comment
  UC746967  Salix exigua var. hindsiana G. Thomas Robbins with J. T. Howell 1945-5-9 1884 Marin 1/2 mi n Hamilton Field Air Base Comment
  CAS-BOT-BC104041  Salix hindsiana G. Thomas Robbins 1945-5-15 1906 El Dorado along railroad right-of-way, 1/2 mi. e. of [Smithflat] Smith Flat 701 Comment
  SD167461  Salix laevigata Jolynn Robbins 2004-4-5 5 San Diego Damon Lane County Park in El Cajon. South on Jamacha, right on Fury. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC1084450  Salix lasiolepis G. Thomas Robbins 1940-3-24 308 Sonoma ca. 6 mi. e. Santa Rosa (Rincon Grade) 167 Comment
  UC746966  Salix orestera G. Thomas Robbins 1945-7-1 2030 El Dorado ca. 4 mi. n.e. Wright's Lake (9 mi. n. of U.S. Hwy. 50, slope e. and above <of> Island Lake) 2590 Comment
  SD165190  Salvia apiana Jolynn Robbins 2004-7-5 22 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UCSB5759  Salvia dorrii var. dorrii Robbins, G. 1952-5-1 Inyo at site of Leadfield; Titus Canyon; Death Valley National Monument 1645 Comment
  CAS-BOT-BC221122  Salvia sonomensis G. Thomas Robbins 1944-4-30 1571 El Dorado On slopes above South Fork Webber Creek, 3-4 mi. NE of Newtown 762 Comment
  GH403497  Salvia sonomensis G. T. Robbins 1944-4-30 1571 Unknown slopes above South Fork Webber Creek, 3-4 miles northeast of Newtown 762 Comment
  UC747555  Salvia sonomensis G. Thomas Robbins 1945-4-28 1847 El Dorado 2-3 mi nw Shingle Springs 457 Comment
  UC747557  Salvia sonomensis G. Thomas Robbins 1944-4-30 1571 El Dorado 3-4 mi ne Newtown (on slopes above South Webber Creek) 762 Comment
  CAS-BOT-BC238636  Sambucus nigra subsp. caerulea G. Thomas Robbins 1942-9-24 915 El Dorado Near Institute of Forest Genetics, 3 mi. e. of Placerville 762 Comment
  UC747067  Sambucus racemosa var. microbotrys G. Thomas Robbins 1945-8-12 2137 El Dorado slopes above outlet stream of Starr Lake (along trail to Freel Peak) 2743 Comment
  CAS-BOT-BC235098  Sambucus racemosa var. racemosa G. Thomas Robbins 1945-8-12 2137 El Dorado On open slopes above outlet stream of Starr Lake, along trail to Freel Peak 2743 Comment
  UC747266  Sanguisorba annua G. Thomas Robbins 1944-6-18 1719 El Dorado Sly Park 5 mi s Pollock Pines; , Sly Park 1005 Comment
  UC747256  Sanguisorba minor subsp. muricata G. Thomas Robbins 1944-5-5 1584 El Dorado about 3 mi e Placerville (near Institute of Forest Genetics); near Institute of Forest Genetics 762 Comment
  UC747265  Sanguisorba minor subsp. muricata G. Thomas Robbins 1944-6-15 1688 El Dorado 3 mi e Placerville (near Institute of Forest Genetics); near Institute of Forest Genetics 822 Comment
  UC1057437  Sanicula arctopoides G. Thomas Robbins 1937-3-26 22 Sonoma near Bodega Bay Comment
  POM196058  Sanicula bipinnata L. F. Robbins 1928-3-18 s.n. Napa Putah Canyon. Comment
  UC747222  Sanicula bipinnatifida G. Thomas Robbins 1943-4-6 979 El Dorado 2 1/2 mi e of Placerville (at s edge of Institute of Forest Genetics); Institute of Forest Genetics 822 Comment
  UCD127944  Sanicula bipinnatifida W. W. Robbins 1926-4-17 534 Lassen Grass Valley. Comment
  UC1084406  Sanicula crassicaulis G. Thomas Robbins 1937-4-17 117 Contra Costa near Point Richmond Comment
  UC746905  Sanicula crassicaulis G. Thomas Robbins 1944-5-28 1637 El Dorado 1-2 mi from confluence of Long Creek with South Fork American River; Long Creek 762 Comment
  UC747219  Sanicula tuberosa G. Thomas Robbins 1943-4-25 1035 El Dorado 3 mi e of Camino (above North Fork Webber Creek, at edge of Buck Brush); Buck Brush 914 Comment
  UC747226  Sanicula tuberosa G. Thomas Robbins 1945-7-1 2029 El Dorado 1 1/2 mi e of Wrights Lake (on trail to Grouse Lake, 9 mi n of U.S. Highway 50) 2286 Comment
  JEPS8454  Sarcostemma hirtellum G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3506 Inyo Titus Canyon Grapevine Mts., Death Valley Nat'l Monument, Titus Canyon 883 Comment
  UC1084489  Satureja douglasii G. Thomas Robbins 1940-5-15 310 San Francisco sand hills of Sunsut District San Francisco Comment
  UC747166  Saxifraga bryophora G. Thomas Robbins 1943-8-15 1346 El Dorado 2 1/2 mi ne of Wrights Lake (at edge of Grouse Lake); Grouse Lake 2438 Comment
  UC747358  Saxifraga bryophora G. Thomas Robbins 1944-7-30 1826 El Dorado 2 mi e of Wrights Lake (along trail to Smith Lake) 2438 Comment
  UC747329  Saxifraga californica G. Thomas Robbins 1944-4-23 1555 El Dorado about 5 mi n of Camino; South Fork American River 762 Comment
  UC747343  Saxifraga californica G. Thomas Robbins 1943-4-25 1030 El Dorado 3 mi e of Camino (above North Fork Webber Creek); North Fork Webber Creek 975 Comment
  UC747351  Saxifraga californica G. Thomas Robbins 1943-5-2 1066 El Dorado about 3 mi e of Camino ( North Fork Webber Creek); North Fork Webber Creek 914 Comment
  GH381214  Saxifraga tolmiei G. T. Robbins 1944-7-29 1807 Unknown Desolation Valley Wilderness Area 2651 Comment
  UC1057454  Scandix pecten-veneris G. Thomas Robbins 1937-4-25 138 Contra Costa e of La Vista Comment
  SD158240  Schinus molle Jolynn Robbins 2004-4-5 4 San Diego Damon Lane County Park in El Cajon. South on Jamacha, right on Fury. Right on Wieghorst, left on Calle Albara. 68 Comment
  SEINET10301447  Schoenoplectus pungens G. T. Robbins 1950-5-13 3350 San Luis Obispo Along west shore of Oso Flaco Lake Comment
  CAS-BOT-BC22415  Scirpus congdonii G. T. Robbins 1956-9-8 3749 El Dorado moist meadow just beyond the northeast edge of Wrights Lake 2133 Comment
  CDA39133  Scirpus koilolepis R. T. Robbins 1979-4-2 s.n. Marin Point Reyes National Seashore. At base of trail from parking lot at McClure Beach. 0 Comment
  CAS-BOT-BC110886  Scirpus microcarpus Guy Thomas Robbins 1956-9-10 3767 Amador Small pond just to the south of Carson Sour, along State Highway 88 2435 Comment
  UC964801  Scirpus pungens G. Thomas Robbins 1950-5-13 3346 San Luis Obispo se Oso Flaco Lake (sand dunes) Comment
  UC746835  Scleranthus annuus subsp. annuus G. Thomas Robbins 1944-4-30 1581 El Dorado flat on canyon side above North Fork Webber Creek; above North Fork Webber Creek 975 Comment
  UC1084402  Scrophularia californica G. Thomas Robbins 1937-4-17 121 Contra Costa near Point Richmond Comment
  UC747123  Scrophularia californica G. Thomas Robbins 1944-6-11 1676 El Dorado 2-3 mi ne Riverton (along Ice House Rd) 1219 Comment
  JEPS7784  Scrophularia californica subsp. floribunda G. Thomas Robbins and Lawrence R. Heckard 1953-5-29 3535 Tulare 3 mi e Springville (above Middle Fork Tule River) 457 Comment
  JEPS7785  Scrophularia californica subsp. floribunda G. Thomas Robbins and Lawrence R. Heckard 1953-5-29 3535 Tulare 3 mi e Springville (above Middle Fork Tule River) 457 Comment
  SD185945  Scrophularia californica subsp. floribunda Jolynn Robbins 2006-4-9 45 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  GH402001  Scutellaria californica G. T. Robbins 1943-7-6 1241 Unknown North Fork Webber Creek, about 3 miles east of Camino 1005 Comment
  UC747566  Scutellaria tuberosa G. Thomas Robbins 1944-4-14 1511 Marin 2-3 mi w of Hamilton Field Air Base (n slope of Big Rock Ridge); Big Rock Ridge 152 Comment
  UC747574  Scutellaria tuberosa G. Thomas Robbins 1944-5-21 1619 El Dorado about 3 mi e of Camino (North Fork Webber Creek); North Fork Webber Creek 975 Comment
  CAS-BOT-BC417775  Sedella pumila G. Thomas Robbins 1943-4-28 1044 El Dorado At the Institute of Forest Genetics, 3 mi. E of Placerville 822 Comment
  RSA422247  Sedella pumila L. F. Robbins 1927-5-6 s.n. El Dorado Near Placerville. Comment
  RSA0074806  Sedum obtusatum G. Thomas Robbins 1943-7-25 1320 El Dorado Above east shore of Echo Lake. 2287 Comment
  UC747406  Sedum obtusatum subsp. obtusatum G. Thomas Robbins 1944-7-28 1780 El Dorado 3-4 mi ne Wrights Lake (on rocky slope along Willow Flat Trail); ne of Wrights Lake 2438 Comment
  UC747400  Sedum rosea subsp. integrifolium G. Thomas Robbins 1945-7-1 2031 El Dorado about 4 mi ne Wrights Lake (above Island Lake, 9 mi n of U.S. Highway 50); ne of Wrights Lake, above Island Lake 2590 Comment
  UC747414  Sedum spathulifolium G. Thomas Robbins 1944-4-23 1564 El Dorado about 4 mi n Camino (rock crevices along Chute Camp Road on canyon side above South Fork American River); above South Fork American River, n of Camino 762 Comment
  UC964849  Selaginella hansenii G. Thomas Robbins 1944-4-23 1547 El Dorado ca. 5 mi n Camino (along Slab Creek near juncture with S. Fork American River) 609 Comment
  CAS-BOT-BC62111  Selaginella hansenii G. Thomas Robbins 1944-4-23 1547 El Dorado along Slab Creek near its juncture with South Fork American River, about 5 mi. n. of Camino 609 Comment
  JEPS8286  Senecio aronicoides G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3569 Madera near The Falls (n end of Crane Valley Lake); Crane Valley Lake 1127 Comment
  UC747173  Senecio aronicoides G. Thomas Robbins 1943-4-25 1033 El Dorado about 3 mi e Camino (slope above North Fork Webber Creek); North Fork Webber Creek 975 Comment
  UC907751  Senecio aronicoides G. Thomas Robbins 1945-5-15 1905 El Dorado 2 to 3 mi e Placerville 701 Comment
  JEPS19398  Senecio flaccidus var. douglasii G. Thomas Robbins 1940-5-19 326 Contra Costa e of Antioch (hills bordering San Joaquin River); San Joaquin River Comment
  SBBG62592  Senecio flaccidus var. douglasii J. R. and R. C. Robbins 1932-6-7 Tulare Sequoia Nat Park Rd 304 Comment
  SBBG62724  Senecio integerrimus J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  CAS-BOT-BC364001  Senecio integerrimus var. major G. Thomas Robbins 1943-6-4 1117 El Dorado On slope above Silver Fork American River near Sacramento Box Co. sawmill (China Flat), 3-4 mi. s. of Kyburz 1371 Comment
  JEPS7931  Senecio mohavensis G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3510 Inyo lower reaches Titus Canyon; Death Valley National Monument, Grapevine Mountains, lower r 701 Comment
  UC747148  Senecio triangularis G. Thomas Robbins 1943-8-15 1340 El Dorado along small stream above Grouse Lake (2 1/2 mi ne of Wright's Lake); along small stream above Grouse Lake 2438 Comment
  RSA32359  Senecio triangularis G. Thomas Robbins 1943-8-15 1340 El Dorado Small stream above Grouse Lake, 2 1/2 miles northeast of Wrights Lake. 2439 Comment
  UC1084374  Senecio vulgaris G. Thomas Robbins 1937-3-27 47 Sonoma Santa Rosa Comment
  CAS-BOT-BC364738  Sericocarpus oregonensis subsp. californicus G. Thomas Robbins 1945-8-5 2086 El Dorado Along north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
  JEPS25287  Sericocarpus oregonensis subsp. californicus G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4177 Tuolumne about .5 mi upstream from Italian Bar Crossing; South Fork Stanislaus River 518 Comment
  UC747140  Sericocarpus oregonensis subsp. californicus G. Thomas Robbins 1945-8-5 2086 El Dorado along north shore of Rockbound Lake, Rockbound Valley Desolation Valley Wilderness Area, Rockbound Valley 2011 Comment
  CAS-BOT-BC364737  Sericocarpus oregonensis subsp. californicus G. Thomas Robbins 1943-8-21 1364 El Dorado In Eddy Arboretum, Institute of Forest Genetics, 3 mi. e. of Placerville 822 Comment
  UC747253  Sibbaldia procumbens G. Thomas Robbins 1943-7-25 1292 El Dorado slopes above and e Medley Lakes (Reservoir); Desolation Valley Wilderness Area 2590 Comment
  GH420829  Sidalcea asprella G. T. Robbins 1945-5-20 1931 Unknown above Sweetwater Creek, near Simpson's Ranch (T. 10N., R. 8E., Sec. 13) Comment
  UC746934  Sidalcea glaucescens G. Thomas Robbins 1944-7-28 1779 El Dorado 3 mi ne Wrights Lake (rocky slope along Willow Flat Trail); along Willow Flat Trail, ne of Wrights Lake 2438 Comment
  UC747479  Sidalcea glaucescens G. Thomas Robbins 1944-7-28 1779 El Dorado 3-4 mi ne Wrights Lake (rocky slope along Willow Flat Trail); along Willow Flat Trail, ne of Wrights Lake 2438 Comment
  UC746932  Sidalcea hirsuta G. Thomas Robbins 1943-7-8 1252 El Dorado about 3 mi e of Camino (above North Fork Webber Creek) 975 Comment
  UC746933  Sidalcea malviflora subsp. asprella G. Thomas Robbins 1945-5-20 1931 El Dorado near Simpson's Ranch (on bank above Sweetwater Creek); above Sweetwater Creek, near Simpson's Ranch 182 Comment
  JEPS25157  Sidalcea malviflora subsp. laciniata G. Thomas Robbins with John Weiler 1959-5-23 4028 Contra Costa slopes on the w side Brooks Island (Richmond); San Francisco Bay, Richmond Comment
  OBI12311  Sidalcea malviflora subsp. laciniata G. Thomas Robbins, John Weiler 1959-5-23 4028 Contra Costa On the W side of Brooks Island, San Francisco Bay, Richmond Comment
  CAS-BOT-BC384442  Silene antirrhina G. Thomas Robbins 1944-6-9 1666 El Dorado Near Institute of Forest Genetics, 3 mi. e. of Placerville 792 Comment
  CAS-BOT-BC384542  Silene bridgesii G. Thomas Robbins 1943-6-5 1125 El Dorado Above North Fork Webber Creek ca. 3 mi. e. of Camino 914 Comment
  UC746901  Silene bridgesii G. Thomas Robbins 1943-6-5 1125 El Dorado ca 3 mi e Camino (above North Fork Webber Creek); , e of Camino 914 Comment
  UC746834  Silene californica G. Thomas Robbins 1944-4-23 1558 El Dorado ca 4 mi nw Camino (along Chute Camp Road above Iowa Creek); above Iowa Creek, nw of Camino 762 Comment
  UC746832  Silene douglasii G. Thomas Robbins 1944-7-28 1775 El Dorado three mi ne Wrights Lake (along Willow Flat Trail); ne of Wright's Lake, along Willow Flat Trail 2286 Comment
  POM181694  Silene gallica L. F. Robbins 1927-3-26 s.n. Yolo Putah Canyon. Comment
  UC1084461  Silene gallica G. Thomas Robbins 1937-6-5 224 Sonoma about 10 mi w Santa Rosa (Pitkin Ranch, Vine Hill region); Vine Hill Region, w of Santa Rosa, Pitkin Ranch Comment
  CAS-BOT-BC389032  Silene laciniata subsp. californica G. Thomas Robbins 1944-4-23 1558 El Dorado Along Chute Camp Road above Iowa Creek, ca. 4 mi. NW of Camino 762 Comment
  UCD99007  Silene laciniata subsp. californica W. W. Robbins 1926-4-17 515 Nevada Grass Valley. Comment
  JEPS25259  Silene laciniata subsp. major G. Thomas Robbins with John Weiler 1959-8-8 4145 San Luis Obispo about 1 1/2 mi se Oso Flaco Lake; se of Oso Flaco Lake 15 Comment
  CAS-BOT-BC389293  Silene lemmonii G. Thomas Robbins 1944-6-7 1659 El Dorado Above North Fork Webber Creek, ca. 3 mi. e. of Camino 914 Comment
  RSA32410  Silene lemmonii G. Thomas Robbins 1943-6-5 1120 El Dorado Above Silver Fork American River near Sacramento Box Co. sawmill ( China Flat ), 3-4 miles S of Kyburz. 1372 Comment
  SEINET195651  Silene nuda G. Thomas Robbins 1943-6-13 1171 El Dorado Along road to Park Creek ca. two miles west of Park Creek. 1219 Comment
  CAS-BOT-BC389610  Silene sargentii G. Thomas Robbins 1943-9-5 1371 El Dorado On summit of Mt. Tallac 2956 Comment
  UC746833  Silene sargentii G. Thomas Robbins 1943-9-5 1371 El Dorado rocky crevices on summit Mt. Tallac; on summit of Mt. Tallac 2956 Comment
  UCD115507  Sisymbrium altissimum Robbins; Raynor 1943-6-1 s.n. Modoc near Likely. Comment
  UC747017  Sisyrinchium bellum G. Thomas Robbins 1945-4-22 1845 El Dorado 2-3 mi nw of Shingle Springs 457 Comment
  UCSB895  Sisyrinchium bellum Robbins, G. 1937-4-4 Alameda Berkeley Hills Comment
  UC747016  Sisyrinchium californicum G. Thomas Robbins 1944-5-16 1611 El Dorado 3 mi e of Camino (above North Fork Webber Creek) 914 Comment
  UC747526  Smilacina stellata G. Thomas Robbins 1945-6-17 1979 El Dorado flat along creek near Baltic Peak; Camp Creek 1005 Comment
  SEINET7262122 Image available Solanum triflorum Robbins, Raynor June 1943 s.n. Modoc Corporation Ranch, Likely Comment
  CAS-BOT-BC157445  Solanum umbelliferum G. T. Robbins 1943-4-21 1017 El Dorado Near Institude of Forest Genetics, about 3 mi. e. of Placerville 792 Comment
  CAS-BOT-BC157598  Solanum umbelliferum G. Thomas Robbins 1943-4-21 1017 El Dorado At western edge of grounds of Institute of Forest Genetics 792 Comment
  UC747553  Solanum umbelliferum G. Thomas Robbins 1943-4-21 1017 El Dorado at western edge of grounds of Institude of Forest Genetics Institude of Forest Genetics 792 Comment
  RSA32382  Solidago canadensis subsp. elongata G. Thomas Robbins 1943-8-15 1354 El Dorado Along Twin Lakes trail, about 3/4 mile northeast of Wrights Lake. 2287 Comment
  OBI15456  Solidago confinis G. Thomas Robbins, John Weiler 1959-8-7 4143 San Luis Obispo NW margin of Oso Flaco Lake 12 Comment
  CAS-BOT-BC365396  Solidago elongata G. Thomas Robbins 1956-9-14 3778 El Dorado Along U. S. Highway 50, about one-half mile northwest of Echo Summit 2225 Comment
  UC747133  Solidago elongata G. Thomas Robbins 1943-8-15 1354 El Dorado about 3/4 mi ne Wrights Lake (along Twin Lakes trail) 2286 Comment
  CAS-BOT-BC157268  Sorbus californica G. Thomas Robbins 1943-7-25 1287 El Dorado On slopes east of Medley Lakes, Desolation Valley Wilderness Area 2590 Comment
  UC747007  Sorbus californica G. Thomas Robbins 1943-7-25 1287 El Dorado on slopes e Medley Lakes; Desolation Valley Wilderness Area 2590 Comment
  CAS-BOT-BC157275  Sorbus scopulina G. Thomas Robbins 1944-7-28 1771 El Dorado Willow Flat Creek along Willow Flat Trail, ca. 2 mi. n. of Wrights Lake 2286 Comment
  UCD99176  Spergula arvensis G. Thomas Robbins 1959-4-5 3972 Alameda at corner of 61st St. and Shattuck Ave. in Oakland. 33 Comment
  OBI17381  Spergularia macrotheca G. Thomas Robbins 1958-6-14 3871 Alameda Near the end of Willow Rd, along the rd leading W to Plummer Landing SW of Newark 3 Comment
  UCD99219  Spergularia macrotheca var. macrotheca G. Thomas Robbins 1958-6-14 3871 Alameda near the end of Willow Road, along the road leading west of Plummer Landing, southwest of Newark. 3 Comment
  JEPS7991  Sphaeromeria cana G. Thomas Robbins, Peter H. Raven 1954-7-31 3645 Inyo upper reaches Lone Pine Canyon (along John Muir Trail between Consultation Lake and Lone Pine Lake); upper reaches Lone Pine Canyon 3352 Comment
  UC746911  Sphenosciadium capitellatum G. Thomas Robbins 1943-9-5 1382 El Dorado above Gilmore Lake (Mt. Tallac); along trail to Mt. Tallac, above Gilmore Lake 2590 Comment
  A345243  Spiraea densiflora G. T. Robbins 1943-7-25 1318 Unknown above east shore of upper Echo Lake, along Desolation Valley trail 2286 Comment
  UC747002  Spiraea densiflora G. Thomas Robbins 1943-7-25 1318 El Dorado above e shore upper Echo Lake (along Desolation Valley trail); Desolation Valley 2286 Comment
  UC747260  Spiraea densiflora G. Thomas Robbins 1945-8-4 2080 El Dorado n shore Rockbound Lake (Rockbound Valley); Desolation Valley Wilderness Area 2011 Comment
  RSA46950  Spiraea densiflora var. splendens G. Thomas Robbins 1945-8-4 2080 El Dorado Along N shore of Rockbound Lake. Rockbound Valley. Desolation Valley Wilderness Area. 2012 Comment
  UC746960  Spiranthes porrifolia G. Thomas Robbins 1943-7-8 1251 El Dorado about 3 mi e Camino (slope above creek); North Fork Webber Creek 975 Comment
  UC746963  Spiranthes romanzoffiana G. Thomas Robbins 1945-8-6 2103 El Dorado near Schlien Ranger Station; Long Meadow 1676 Comment
  JEPS25241  Stachys ajugoides G. Thomas Robbins 1959-8-2 4118 Alameda about 1 3/4 mi nw Mt. Eden (about 1/4 mi n of the w end of Depot Road, just e of the American Salt Co., about 3/4 mi s of Russell); San Francisco Bay 1 Comment
  UC907675  Stachys ajugoides var. rigida G. Thomas Robbins 1944-7-6 1749 El Dorado 5 mi s Pollock Pines; Sly Park 975 Comment
  JEPS25251  Stephanomeria cichoriacea G. Thomas Robbins with John Weiler 1959-8-6 Monterey 4.4 mi s Hot Springs Creek crossing (along State Highway 1) 76 Comment
  JEPS25261  Stephanomeria exigua subsp. carotifera G. Thomas Robbins with John Weiler 1959-8-8 4147 San Luis Obispo 1.5 mi se Oso Flaco Lake 15 Comment
  UC907777  Stephanomeria lactucina G. Thomas Robbins 1945-8-3 2073 El Dorado below Forni Lake (w slope of Tells Peak); Desolation Valley Wilderness Area, Tells Peak 2438 Comment
  UCD136396  Stephanomeria pauciflora W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  JEPS25288  Stephanomeria virgata subsp. pleurocarpa G. Thomas Robbins with Robert Ornduff and Howard Whisler 1959-10-26 4178 Tuolumne about one mi e Jacksonville (just w of Kanaka Creek, along State Highway 120 (paralleling Tuolumne River)); Tuolumne River 195 Comment
  POM197071  Streptanthus glandulosus L. F. Robbins 1927-4-15 s.n. Napa [no locality information provided] Comment
  UC747405  Streptanthus glandulosus subsp. pulchellus G. Thomas Robbins 1945-5-5 1870 Marin n-facing slope of ridge 2-3 mi w Hamilton Field Air Base; Big Rock Ridge 152 Comment
  CAS-BOT-BC87524  Streptanthus tortuosus G. Thomas Robbins 1944-4-23 1562 El Dorado South Fork American River, about 4 miles north of Camino. 762 Comment
  CAS-BOT-BC87525  Streptanthus tortuosus G. Thomas Robbins 1944-6-17 1708 El Dorado Above U.S. Highway 50, about 1 mile east of Pyramid Ranger Station. 1676 Comment
  CAS-BOT-BC87526  Streptanthus tortuosus G. Thomas Robbins 1945-6-17 1992 El Dorado Above Camp Creek, near Baltic Peak. 1036 Comment
  GH422300  Streptanthus tortuosus G. T. Robbins 1944-6-17 1708 Unknown open southfacing slope above U.S. Highway 50, ca. 1 mi. east of Pyramid Ranger Station 1676 Comment
  UC747382  Streptanthus tortuosus G. Thomas Robbins 1944-6-17 1708 El Dorado s-facing slope above Hwy 50 about 1 mi e Pyramid Ranger Station 1676 Comment
  SBBG72140  Streptanthus tortuosus var. orbiculatus J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC747440  Streptanthus tortuosus var. orbiculatus G. Thomas Robbins 1943-7-25 1322 El Dorado slopes above e shore Echo Lake 2286 Comment
  UC907713  Streptanthus tortuosus var. orbiculatus G. Thomas Robbins 1945-6-17 1992 El Dorado slopes above Camp Creek (near Baltic Peak) 1036 Comment
  JEPS7928  Stylocline micropoides G. Thomas Robbins with R. Bacigalupi, L. Constance, G. W. Gillett, and L. R. Heckard 1952-5-1 3494 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains (Grapevine Mountains, Death Valley National Monument) 1524 Comment
  SEINET5505503 Image available Styrax officinalis var. californicus G. Thomas Robbins 1945-1 1934 El Dorado Along Sweetwater Creek, 3-4 miles south of Salmon Falls 183 Comment
  UC747575  Styrax officinalis var. redivivus G. Thomas Robbins 1945-5-20 1934 El Dorado along Sweetwater Creek 3-4 mi s Salmon Falls; along Sweetwater Creek, s of Salmon Falls 182 Comment
  CAS-BOT-BC48039  Styrax redivivus G. Thomas Robbins 1945-5-20 1934 El Dorado Along Sweetwater Creek, 3-4 mi. s. of Salmon Falls. 182 Comment
  GH386282  Symphoricarpos albus G. T. Robbins 1944-6-29 1743 Unknown small tributary streams of North Fork Webber Creek, about 3 miles east of Camino 914 Comment
  UC747083  Symphoricarpos albus var. laevigatus G. Thomas Robbins 1942-10-22 916 El Dorado 5-6 mi ne Placerville (woods above Iowa Creek) 914 Comment
  SBBG69507  Symphoricarpos mollis J. R. and R. C. Robbins 1932-7-18 El Dorado W side, Lake Tahoe 2072 Comment
  CAS-BOT-BC238919  Symphoricarpos rotundifolius G. Thomas Robbins 1944-7-28 1783 El Dorado Along Willow Flat Trail ca. 1/4 mi. w. of Rockbound Pass, Desolation Valley Wilderness Area 2438 Comment
  CAS-BOT-BC238920  Symphoricarpos rotundifolius G. Thomas Robbins 1945-8-12 2139 El Dorado West of High Meadow on Freel Peak trail, 6-8 mi. SE of Lake Tahoe 2286 Comment
  UC747051  Symphoricarpos rotundifolius var. rotundifolius G. Thomas Robbins 1944-7-28 1783 El Dorado ca 0.25 mi w Rockbound Pass (slopes along Willow Flat Trail); Desolation Valley Wilderness Area 2438 Comment
  UC747100  Symphoricarpos rotundifolius var. rotundifolius G. Thomas Robbins 1943-7-25 1316 El Dorado woods along n shore Upper Echo Lake 2286 Comment
  JEPS25007  Symphyotrichum chilense G. Thomas Robbins 1958-9-1 3933 Alameda along and near mouth of Cordonices Creek, Berkeley-Albany city border Cordonices Creek Comment
  JEPS25272  Symphyotrichum chilense G. Thomas Robbins 1959-9-6 4159 Alameda corner of 6th and B sts Hayward 38 Comment
  OBI17001  Symphyotrichum chilense G. Thomas Robbins 1959-9-6 4159 Alameda Vacant lot at corner of 6th and B Streets, Hayward 38 Comment
  UCD81569  Symphyotrichum chilense W. W. Robbins; W. D. Norton 1927-10-1 830 Yolo West of Davis. Comment
  CAS-BOT-BC97911  Symphyotrichum frondosum G. Thomas Robbins 1959-9-27 4164 Alameda Immediately west of Eastshore Highway, at eastern edge of San Francisco Bay, a short distance south of the Powell St. Comment
  UCD136509  Symphyotrichum hendersonii Robbins; Raynor 1943-6-1 s.n. Plumas Belden. Comment
  UC907769  Symphyotrichum spathulatum G. Thomas Robbins 1945-8-6 2101 El Dorado Long Meadow, near Schlien Ranger Station 1676 Comment
  UCD136631  Symphyotrichum spathulatum W. W. Robbins; W. D. Norton 1927-10-1 831 Yolo West of Davis. Comment
  JEPS8001  Syntrichopappus fremontii G. Thomas Robbins and Rimo Bacigalupi 1952-4-28 3466 Kern 3.5 mi e Walker Pass (along State Highway 178); Freeman Canyon 1295 Comment
  SD173725  Tamarix ramosissima Jolynn Robbins, Joe Barth 2004-8-2 29 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC1084375  Taraxacum officinale G. Thomas Robbins 1937-3-27 48 Sonoma Santa Rosa Comment
  UCD107055  Taraxia tanacetifolia W. W. Robbins 1937-6-13 s.n. Unknown County unknown: Pacific Highway near Weed. Comment
  A355457  Taxus brevifolia G. T. Robbins 1943-10-5 1397 Unknown ca. 3 mi. e. of Camino, El Dorado Co. 975 Comment
  RSA92971  Taxus brevifolia G. Thomas Robbins 1943-10-5 1397 El Dorado Shady woods in a ravine ca. 3 miles E of Camino. 976 Comment
  CAS-BOT-BC447424  Tellima grandiflora G. Thomas Robbins 1944-5-28 1633 El Dorado along Long Creek, 1-2 miles from its confluence with South Fork American River 762 Comment
  UC747379  Tellima grandiflora G. Thomas Robbins 1943-5-23 1083 El Dorado 3 mi e Camino (woods along North Fork Webber Creek); North Fork Webber Creek 914 Comment
  OBI19091  Tetragonia tetragonoides G. Thomas Robbins 1958-5-25 3839 Alameda Bay Farm Island, just S of San Leandro about 1/2 I E of Maitland Dr, Alameda Comment
  UC747446  Thalictrum fendleri G. Thomas Robbins 1943-7-25 1291 El Dorado edge of small lake on slopes above Medley Lakes (reservoir); Desolation Valley Wilderness Area 2590 Comment
  RSA46757  Thalictrum fendleri G. Thomas Robbins 1943-7-25 1291 El Dorado At edge of small lake on rocky slopes above Medley Lakes (reservoir) Desolation Valley Wilderness. 2591 Comment
  UC747445  Thalictrum fendleri var. polycarpum G. Thomas Robbins 1944-6-29 1742 El Dorado small stream near North Fork Webber Creek (about 3 mi e of Camino) 914 Comment
  UCD117116  Thamnosma montana W. W. Robbins 1939-12-24 s.n. San Diego SE part of county. Comment
  UC747361  Thysanocarpus curvipes G. Thomas Robbins 1944-4-14 1513 Marin 2-3 mi w Hamilton Field Air Base (on n slope of Big Rock Ridge); w of Hamilton Field Air BAse, n slope Big Rock Ridge 152 Comment
  UCD115965  Thysanocarpus curvipes W. W. Robbins 1928-4-29 1677 Sacramento American River. Comment
  CAS-BOT-BC88267  Thysanocarpus curvipes G. Thomas Robbins 1945-5-27 1955 El Dorado About 1 mile north of Pleasant Valley. 762 Comment
  UC1084484  Thysanocarpus radians G. Thomas Robbins 1938-4-15 260 Sonoma along road to Graton 6-7 mi w Santa Rosa Comment
  UCD116046  Thysanocarpus radians W. W. Robbins 1926-4-17 533 Nevada Grass Valley. Comment
  UC907667  Tonella tenella G. Thomas Robbins 1944-4-23 1553 El Dorado about 5 mi n Camino (along shore of South Fork American River, near Michigan-California Lumber Co. Railroad Tramway); South Fork American River 792 Comment
  A355431  Torreya californica G. T. Robbins 1943-3-28 972 Unknown along Michigan-California Lumber Co. R. R. above South Fork American River 914 Comment
  UC747691  Torreya californica G. Thomas Robbins 1944-4-30 1579 El Dorado in shady places along South Fork Webber Creek 3-4 mi ne of Newtown; South Fork Webber Creek 914 Comment
  JEPS7983  Trichophorum clementis G. Thomas Robbins, Peter H. Raven 1954-7-19 3621 Inyo meadow at edge of stream outlet Consultation Lake; Lone Pine Canyon, edge stream outlet Consultation Lake 3590 Comment
  SD185761  Trichostema lanceolatum Jolynn Robbins 2006-9-4 54 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  UC747560  Trichostema oblongum G. Thomas Robbins 1943-7-6 1242 El Dorado 3 mi E of Camino (on canyon slope above North Fork Webber Creek) 975 Comment
  UC746995  Trifolium breweri G. Thomas Robbins 1944-6-11 1673 El Dorado 2-3 mi ne Riverton (along Ice House Rd) 1219 Comment
  OBI12716  Trifolium depauperatum var. amplectens G. Thomas Robbins 1959-4-11 3975 Alameda About 1/4 mi N of the W end of Depot Rd, adj to (just E of) the American Salt Co evaporating ponds along the shore of San Francisco Bay, about 1-3/4 mi NW of Mt Eden and about 3/4 mi S of Russell 2 Comment
  OBI12717  Trifolium depauperatum var. depauperatum G. Thomas Robbins 1959-4-11 3976 Alameda About 1/4 mi N of the W end of Depot Rd, adj to (just E of) the American Salt Co evaporating ponds along the shore of San Francisco Bay, about 1-3/4 mi NW of Mt Eden and about 3/4 mi S of Russell 2 Comment
  UC1084487  Trifolium fucatum G. Thomas Robbins 1938-5-19 263 Sonoma sw Santa Rosa (along Sandy Point Rd) Comment
  UCD111225  Trifolium hybridum Robbins and Raynor 1943-6-1 s.n. Plumas Belden. Comment
  UCD111226  Trifolium hybridum Robbins; Raynor 1943-6-1 s.n. Plumas Belden. Comment
  JEPS8229  Trifolium incarnatum G. Thomas Robbins 1954-5-8 3618 Marin 1 mi w Ignacio (upper end of Arroyo San Jose) 30 Comment
  UC746993  Trifolium longipes var. hansenii G. Thomas Robbins 1944-6-17 1706 El Dorado ca 1 mi e Pyramid Ranger Station (along bank of South Fork American River) 1676 Comment
  JEPS25147  Trifolium macraei G. Thomas Robbins 1959-5-17 4017 Alameda just ne junction of Park Blvd, Skyline Blvd, and Manzanita Dr (at summit of hills); Okland Hills, Contra Costa County boundary Comment
  UC747293  Trifolium microcephalum G. Thomas Robbins 1943-4-30 1054 El Dorado 3 mi e Placerville (slope w of the Institute of Forest Genetics) 762 Comment
  UC746989  Trifolium variegatum var. melananthum G. Thomas Robbins 1945-4-22 1856 El Dorado ca 2.5 mi e Shingle Springs 457 Comment
  UC746990  Trifolium variegatum var. melananthum G. Thomas Robbins 1943-4-21 1021 El Dorado 3 mi e Placerville (near Institute of Forest Genetics) 762 Comment
  JEPS25101  Trifolium variegatum var. variegatum G. Thomas Robbins 1959-4-11 3975 Alameda ca 1/4 mi n west end of Depot Rd (just e of the American Salt Co. evaporating ponds along the San Francisco Bay shore, ca 1 3/4 mi nw of Mt. Eden and 3/4 mi s of Russell) 1 Comment
  JEPS25111  Trifolium willdenovii G. Thomas Robbins 1959-4-5 3970 Alameda at corner of 61st St. and Shattuck Ave. vacant lot; Oakland 33 Comment
  UC1057455  Trifolium willdenovii G. Thomas Robbins 1937-4-17 133 Contra Costa near Point Richmond Comment
  UC746988  Trifolium willdenovii G. Thomas Robbins 1945-5-17 1911 El Dorado ca 3 mi e Camino (above North Fork Webber Creek) 1005 Comment
  UC1057464  Trifolium wormskioldii G. Thomas Robbins 1937-5-23 197 Sonoma ca 10 mi w Santa Rosa (Pitkin Ranch); Vine Hill region Comment
  JEPS22043  Triglochin maritima G. Thomas Robbins 1958-7-4 3886 Alameda about 1/4 mi s East Creek Slough (at the ne edge of San Leandro Bay, Oakland); nw edge San Leandro Bay, Oakland Comment
  JEPS25133  Triglochin maritima G. Thomas Robbins 1959-4-25 4001 Alameda just s of the Emeryville interchange (Powell St.) at the western edge Eastshore Highway (Emeryville, shore of San Francisco Bay); shore San Francisco Bay, Emeryville Comment
  JEPS25134  Triglochin maritima G. Thomas Robbins 1959-4-25 4002 Alameda w edge of Eastshore Hwy just s Emeryville interchange (Powell St.); San Francisco Bay, Emeryville Comment
  JEPS25148  Triglochin maritima G. Thomas Robbins with S. Galen Smith 1959-5-21 4018 Alameda just s of the Emeryville interchange (Powell St.) along w edge Eastshore Highway (Emeryville, edge San Francisco Bay); edge San Francisco Bay, Emeryville Comment
  JEPS7968  Triglochin palustris G. Thomas Robbins and Peter H. Raven 1954-7-27 3638 Tulare upper meadow Sequoia National Park, Crabtree Meadows (shallow pond) 3139 Comment
  UC1057434  Trillium albidum G. Thomas Robbins 1937-3-25 3 Sonoma Sonoma Creek Bennett Valley, Sonoma Creek Comment
  UC1084348  Trillium albidum G. Thomas Robbins 1937-3-25 2 Sonoma Sonoma Creek Bennett Valley, Sonoma Creek Comment
  CAS-BOT-BC519075  Trillium angustipetalum G. Thomas Robbins 1943-4-10 984 El Dorado Along bank of North Fork Webber Creek, 3 miles east of Camino 944 Comment
  UC1057438  Trillium chloropetalum G. Thomas Robbins 1937-3-26 27 Sonoma creek along rd. e. of Bodega Bay Comment
  UCD123388  Triphysaria eriantha W. W. Robbins 1926-4-17 532 Nevada Grass Valley. Comment
  JEPS23817  Triphysaria eriantha subsp. eriantha G. Thomas Robbins 1959-4-11 3980 Alameda about 1 3/4 mi w (and slightly n) Mt. Eden crossroads (about 3/4 mi s of Russell, about 1/4 mi n of w end of Depot Road, just e of American Salt Co. evaporating ponds); along shore of San Francisco Bay 1 Comment
  UC747120  Triphysaria eriantha subsp. eriantha G. Thomas Robbins 1945-4-22 1858 El Dorado about 2 1/2 mi e Shingle Springs; e of Shingle Springs 457 Comment
  JEPS7449  Triphysaria pusilla G. Thomas Robbins 1952-4-5 3411 Mendocino in upper Van Damme State Park (about 3 mi se of Little River); in upper Van Damme State Park, se of Little River Comment
  UC747078  Triphysaria pusilla G. Thomas Robbins 1944-4-30 1578 El Dorado 3-4 mi ne Newtown (along South Fork Webber Creek); along South Fork Webber Creek 914 Comment
  JEPS19394  Triphysaria versicolor subsp. faucibarbata G. Thomas Robbins 1937-6-6 238 Sonoma along roadside near Bodega Bay; near Bodega Bay Comment
  JEPS19396  Triphysaria versicolor subsp. faucibarbata G. Thomas Robbins 1938-4-15 262 Sonoma along road to Graton 6-7 mi w Santa Rosa Comment
  CAS-BOT-BC519138  Triteleia hyacinthina G. Thomas Robbins 1944-6-27 1741 El Dorado Above North Fork Webber Creek, ca. 3 miles east of Camino 975 Comment
  CAS-BOT-BC522281  Triteleia hyacinthina G. Thomas Robbins 1943-4-18 1010 Sacramento Carmichael district, 15 mi. NE of Sacramento Comment
  UC747524  Triteleia ixioides subsp. scabra G. Thomas Robbins 1945-5-20 1945 El Dorado nw of Rescue (along Deer Valley Road) 304 Comment
  CAS-BOT-BC525786  Triteleia ixioides subsp. unifolia G. Thomas Robbins 1943-4-29 1048 El Dorado C.C.C. Camp Snowline, 3 mi. e. of Camino 1036 Comment
  UC747530  Triteleia laxa G. Thomas Robbins 1943-4-18 1009 Sacramento 15 mi ne Sacramento; Carmichael district Comment
  UC565400  Triteleia peduncularis G. Thomas Robbins 1937-6-5 216 Sonoma about ten mi w Santa Rosa (Vine Hill region, Pitkin Ranch); Vine Hill region, Pitkin Ranch Comment
  JEPS8336  Tropidocarpum gracile G. Thomas Robbins and Rimo Bacigalupi 1952-4-26 3467 Kern along State Hwy 178 3.5 mi e Walker Pass; Freeman Canyon 1295 Comment
  UCD134691  Tsuga heterophylla W. W. Robbins 1941-11-1 s.n. Del Norte Fort Dick. Comment
  UC747687  Tsuga mertensiana G. Thomas Robbins 1943-6-27 1211 El Dorado rocky ridge above Echo Summit Pass (about 0.75 mi sw of U. S. Highway 50) 2438 Comment
  UC1084365  Ulex europaeus G. Thomas Robbins 1937-3-26 31 Sonoma Forming dense thickets along road W of Bodega. Comment
  JEPS8055  Uropappus lindleyi G. Thomas Robbins 1953-5-8 3519 Calaveras near Mercer Cave (about 1.5 mi n of Murphys) 701 Comment
  JEPS25108  Urtica urens G. Thomas Robbins 1959-4-11 3982 Alameda about 1/2 mi w of Mount Eden (just e of Mount Eden Cemetary, along Depot Road); Depot Road 10 Comment
  UC747671  Vaccinium cespitosum G. Thomas Robbins 1943-7-25 1299 El Dorado along trail on e shore Medley Lakes (Reservoir); Desolation Valley Wilderness Area 2438 Comment
  GH363257  Vaccinium parvifolium G. T. Robbins 1945-8-5 2083 Unknown rocky slope along north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
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Feb 8 2016
  CAS-BOT-BC199400  Vaccinium shastense subsp. nevadense G. Thomas Robbins 1945-8-5 2083 El Dorado Along north shore of Rockbound Lake, Rockbound Valley, Desolation Valley Wilderness Area 2011 Comment
  CAS-BOT-BC199401  Vaccinium shastense subsp. nevadense G. Thomas Robbins 1944-5-28 1639 El Dorado Along borders of Long Creek, 1-2 mi. from its confluence with South Fork American River 762 Comment
  UC747042  Valeriana californica G. Thomas Robbins 1943-6-27 1228 El Dorado on slopes se Echo Summit Pass 2438 Comment
  JEPS8282  Velezia rigida G. Thomas Robbins and Lawrence R. Heckard 1953-6-1 3574 Stanislaus on road to Waterford 3.6 mi w La Grange (above Tuolumne River); above Tuolumne River Comment
  UC747548  Veratrum californicum var. californicum G. Thomas Robbins 1943-7-25 1315 El Dorado along n shore Upper Echo Lake 2286 Comment
  UCD125991  Verbena lasiostachys G. Thomas Robbins 1953-5-30 3542 Tulare road to Balch Park, about one-half mile east of Milo junction and 7.5 miles north of Springville. 609 Comment
  UCD125992  Verbena lasiostachys W. W. Robbins 1941-8-8 s.n. Mendocino Round Valley. Comment
  JEPS8062  Verbena lasiostachys var. lasiostachys G. Thomas Robbins and Lawrence R. Heckard 1953-5-30 3542 Tulare 7.5 mi n Springville (on road to Balch Park, ca 1/2 mi e of Milo junction) 609 Comment
  JEPS19383  Veronica persica G. Thomas Robbins 1937-3-27 45 Sonoma Santa Rosa Comment
  JEPS21998  Veronica persica G. Thomas Robbins 1958-4-13 3811 Alameda about 1/2 mi s of the Mission Road junction (along Calaveras Road in Sunol Valley); Sunol Valley 76 Comment
  JEPS15541  Veronica serpyllifolia subsp. humifusa G. Thomas Robbins with L. R. Heckard 1956-7-25 3699 Lake at e base of ridge that forms a se extension of Snow Mountain West (about 1/2 mi airline from its summit, into the headwaters of Bear Creek, a trib. of Rice Fork of Eel River) 1981 Comment
  UC1084414  Vicia americana var. americana G. Thomas Robbins 1937-4-11 104 San Mateo near Redwood City Comment
  UC1084368  Vicia sativa G. Thomas Robbins 1937-3-26 34 Sonoma just e Bodega (along road to Bodega) Comment
  UC907694  Vicia sativa subsp. nigra G. Thomas Robbins 1943-5-7 1076 El Dorado 3 mi e Placerville; Institute of Forest Genetics Arboretum 822 Comment
  UC1084366  Vinca major G. Thomas Robbins 1937-3-26 32 Sonoma along rd. to Bodega Bay just w. of Bodega Comment
  CAS-BOT-BC263921  Viola adunca G. Thomas Robbins 1945-7-1 2020 El Dorado Near Lyons Creek along road ca. 4 miles S of Wrights Lake 2042 Comment
  SBBG69169  Viola adunca J. R. and R. C. Robbins 1932-7-14 Mariposa Chinquapin to Glacier Point Comment
  UC907739  Viola adunca G. Thomas Robbins 1945-7-1 2020 El Dorado 4 mi s of Wrights Lake (near Lyons Creek along road) 2042 Comment
  SEINET195171 Image available Viola bakeri G. T. Robbins 1945-7-1 2019 El Dorado Near Lyons Creek along road ca. 4 mi. S. of Wrights Lake 2042 Comment
  UC907738  Viola bakeri G. Thomas Robbins 1945-7-1 2019 El Dorado 4 mi s of Wrights Lake (near Lyons creek along road) 2042 Comment
  UC1057435  Viola douglasii G. Thomas Robbins 1937-3-25 9 Sonoma 8-10 mi e of Santa Rosa (near Golf and Country Club); Santa Rosa Creek Canyon Comment
  SEINET195644 Image available Viola glabella G. T. Robbins 1943-6-27 1226 El Dorado Near Echo Summit Pass 2286 Comment
  UC746945  Viola macloskeyi G. Thomas Robbins 1944-5-7 1587 a El Dorado 5 mi s of Pollock Pines (n of Sly Park Meadow, along tributary of Park Creek); Park Creek 1005 Comment
  UCD110698  Viola ocellata W. W. Robbins; S. W. Winter Date Unknown 778 Sutter Sutter Basin. Comment
  SBBG78628  Viola pedunculata R. C. and J. R. Robbins -Mar-1921 Santa Barbara Santa Cruz Island Comment
  UC1057444  Viola pedunculata G. Thomas Robbins 1937-4-11 84 San Mateo on slopes above Spring Valley Lake (s of San Francisco) Comment
  UC1057466  Viola pedunculata G. Thomas Robbins 1940-3-16 275 Alameda 1 mi w of Corral Hollow (on road to Tracy) 381 Comment
  UC746941  Viola sheltonii G. Thomas Robbins 1943-4-10 982 El Dorado 3 mi e of Camino (North Fork Webber Creek); North Fork Webber Creek 944 Comment
  GH382063  Viola tomentosa G. T. Robbins 1944-6-18 1731 Unknown on slopes above North Fork Cosumnes River at Capps Crossing, El Dorado National Forest (T. 9N. R. 14 E Sec. 9) 1524 Comment
  SEINET195173 Image available Viola tomentosa G. T. Robbins 1945-8-5 2099 El Dorado Pine woods along road ca. 1 mi. W of Wentworth Springs 1829 Comment
  UC1716059  Viola tomentosa G. Thomas Robbins 1944-6-18 1731 El Dorado above North Fork Cosumnes River at Capps Crossing El Dorado National Forest 1524 Comment
  UC1762034  Viola tomentosa G. Thomas Robbins 1945-8-5 2099 El Dorado ca. 1 mi W of Wentworth Springs Comment
  UC746935  Viola tomentosa G. Thomas Robbins 1945-8-5 2099 El Dorado 1 mi w of Wentworth Springs (along road) 1828 Comment
  UCD102812  Vitis californica Robbins and Raynor 1943-6-1 s.n. Plumas Feather River Canyon near Virgilia. Comment
  SEINET197067 Image available Vulpia microstachys var. ciliata G. Thomas Robbins 1972 El Dorado Shady Ponderosa pine woods near CCC Camp Snowline, 3 miles east of Camino. 1036 Comment
  UC907635  Vulpia microstachys var. ciliata G. Thomas Robbins 1945-6-8 1972 El Dorado 3 mi e Camino (near C.C.C. Camp Snowline) 1036 Comment
  SEINET197066 Image available Vulpia microstachys var. pauciflora G. Thomas Robbins 1920 El Dorado Along Placerville-Rescue road, 3 mi. E. of Rescue. 457 Comment
  UCD116384  Wislizenia refracta W. W. Robbins; A. S. Crafts 1931-9-18 2258 Stanislaus Modesto - Justine. Comment
  JEPS8228  Wislizenia refracta subsp. californica G. Thomas Robbins with D. M. Post, J. W. Dawson, and P. H. Raven 1954-9-3 3646 Stanislaus along Vernalis-Modesto rd (Maze Rd) 5.4 mi e Vernalis (1.8 mi e of bridge crossing the San Joaquin River) 7 Comment
  UCD116388  Wislizenia refracta subsp. californica G. Thomas Robbins; D. M. Post, J. W. Dawson and P. H. Raven 1954-9-3 3646 Stanislaus Along Vernalis-Modesto Road (Maze Road), 5.4 miles east of Vernalis and 1.8 miles east of bridge crossing the San Joaquin River. 7 Comment
  UC1084382  Wyethia angustifolia G. Thomas Robbins 1937-4-11 85 San Mateo on slopes above Spring Valley Lake (s of San Francisco) Comment
  UC747170  Wyethia angustifolia G. Thomas Robbins 1944-6-27 1736 El Dorado grassy ravine on canyon slope above North Fork Webber Creek (ca 3 mi e of Camino) 975 Comment
  UC747211  Wyethia glabra G. Thomas Robbins with J. T. Howell 1945-5-9 1891 Marin 1 mi n Ignacio 0 Comment
  CAS-BOT-BC383374  Wyethia helenioides G. Thomas Robbins 1944-5-5 1583 El Dorado Near Institute of Forest Genetics, about 3 mi. e. of Placerville 762 Comment
  UC747162  Wyethia helenioides G. Thomas Robbins 1944-5-5 1583 El Dorado about 3 mi e Placerville (near Institute of Forest Genetics) 762 Comment
  SBBG60855  Wyethia mollis R. C. and J. R. Robbins 1932-7-17 Mono Tioga Pass, close to Tuloumne County line Comment
  UC747154  Wyethia mollis G. Thomas Robbins 1945-7-8 2040 El Dorado in pine woods near Al Tahoe; Lake Tahoe 1920 Comment
  SEINET8734376 Image available Wyethia reticulata G. Thomas Robbins 1945-1 2013 El Dorado along Green Valley Road for 1/4 mi. immediately w. of Rescue (T.10N, R.9E, Sec. 23) 396 Comment
  SD185571  Xanthium strumarium Jolynn Robbins 2006-9-4 58 San Diego Damon Lane County Park in south El Cajon. South on Jamacha to Fury, turn right. Then right on Wieghorst, left on Calle Albara. 68 Comment
  SD45203  Xylorhiza tortifolia G. Thomas Robbins 1950-4-7 3328 Inyo ca. 0.5 mile north and east of Little Lake 910 Comment
  UC746909  Yabea microcarpa G. Thomas Robbins 1944-5-21 1618 El Dorado ca 3 mi e Camino (on canyon slope above North Fork Webber Creek) 975 Comment
  CAS-BOT-BC454200  Zannichellia palustris G. Thomas Robbins 1958-10-11 3951 Alameda In southwestern San Leandro, at the west end of Boxwood Ave. Comment
  UC747519  Zigadenus exaltatus G. Thomas Robbins 1943-5-2 1060 El Dorado canyon slope above creek about 3 mi e Camino; North Fork Webber Creek 914 Comment
  UC747013  Zigadenus venenosus var. venenosus G. Thomas Robbins 1944-7-28 1782 El Dorado near Rockbound Pass (Willow Flat Trail); Desolation Valley Wilderness Area 2438 Comment



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