Search Results — 2000 specimen records retrieved (1527 records with coordinates)
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Results for search: Collector=Howell;   

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

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  RSA986  Abies bracteata J. T. Howell 1927-8-18 655 Monterey Santa Lucia Mountains; Arroyo Seco River, near Santa Lucia Camp 670 Comment
  CAS-BOT-BC78004  Abies concolor John Thomas Howell; Gordon H. True 1970-7-14 5514 Sierra At Verdi Peak Lookout, Verdi Range 2560 Comment
  CAS-BOT-BC78010  Abies concolor John Thomas Howell 1950-7-19 27077 Tulare Bakeoven to Hessian Meadows 2529 Comment
  CAS-BOT-BC383993  Abronia turbinata John Thomas Howell 1938-8-7 14285 Mono Whiskey Creek 2133 Comment
  CAS-BOT-BC436989  Acaena pinnatifida var. californica John Thomas Howell 1933-5-14 11285 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC447793  Acaena pinnatifida var. californica John Thomas Howell 1956-6-17 31571 San Francisco Summit of ridge of Bayview Hills Comment
  CAS-BOT-BC330637  Acer glabrum var. glabrum John Thomas Howell 1925-6-10 1142 El Dorado Lake Tahoe Region, Eagle Lake Trail 2042 Comment
  CAS-BOT-BC334184  Acer negundo var. californicum John Thomas Howell 1925-11-7 1549 Contra Costa Between Pinehurst and Canyon Station, San Leandro Canyon Comment
  CAS-BOT-BC28800  Achillea millefolium John Thomas Howell 1931-4-13 6311 Santa Barbara Santa Cruz Island near west end. Comment
  CAS-BOT-BC260359  Achnatherum hymenoides John Thomas Howell 1949-7-17 25424 Inyo Little Cottonwood Creek 2987 Comment
  CAS-BOT-BC218023  Achnatherum latiglume John Thomas Howell 1962-7-9 38394 Kern Near Park Headquarters, Greenhorn Mountains 1798 Comment
  CAS-BOT-BC210689  Achnatherum lemmonii John Thomas Howell 1962-6-17 37710 Plumas Portola 1463 Comment
  CAS-BOT-BC210712  Achnatherum lemmonii John Thomas Howell; R. C. Barneby 1954-5-13 29542 Sierra North Fork Yuba River, 4 miles below Downieville 807 Comment
  GH361420  Achnatherum lemmonii J. T. Howell 1943-8-3 18979 Unknown Plaskett Meadows 1828 Comment
  CAS-BOT-BC210803  Achnatherum nelsonii John Thomas Howell; Gordon H. True 1970-7-29 47076 Tulare South end of Cannell Meadow on road to Pine Flat, Kern Plateau 2316 Comment
  CAS-BOT-BC210736  Achnatherum nelsonii John Thomas Howell 1963-8-22 40295 Alpine About 1/2 mile west of Monitor Pass 2529 Comment
  CAS-BOT-BC216890  Achnatherum occidentale John Thomas Howell 1947-7-24 23589 San Bernardino Santa Ana River, San Bernardino Mountains 1920 Comment
  CAS-BOT-BC216911  Achnatherum occidentale John Thomas Howell; Gordon H. True 1970-7-14 5510 Sierra At Verdi Peak Lookout, Verdi Range, Sierra County 2560 Comment
  CAS-BOT-BC210847  Achnatherum occidentale subsp. californicum John Thomas Howell 1951-6-28 27710 Plumas Eureka Peak 2255 Comment
  CAS-BOT-BC210878  Achnatherum occidentale subsp. californicum John Thomas Howell 1960-8-19 36146 Tehama Lassen Volcanic National Park. Brokeoff Mt. Trail 2590 Comment
  CAS-BOT-BC218608  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1966-7-12 71787 Kern Bartolas Country 7.2 miles south of Cherry Hill and Cannell Meadow Roads, Sierra Nevada 2164 Comment
  CAS-BOT-BC218075  Achnatherum pinetorum John Thomas Howell 1947-8-10 23970 Inyo Sam Mack Lake, Big Pines Lake 3657 Comment
  CAS-BOT-BC391508  Aconitum columbianum subsp. columbianum John Thomas Howell 1937-7-22 13323 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC391642  Actaea rubra John Thomas Howell 1947-8-13 24063 Inyo Big Pine Lakes Trail 2895 Comment
  CAS-BOT-BC132896  Adenostoma fasciculatum John Thomas Howell 1946-5-12 s.n. Marin Carson Ridge Comment
  CAS-BOT-BC132900  Adenostoma fasciculatum John Thomas Howell 1930-12-28 5720 Marin Slopes of Mt. Tamalpais above Mill Valley Comment
  CAS-BOT-BC69642  Adiantum capillus-veneris John Thomas Howell 1954-11-3 30135 Monterey Arroyo Seco River Canyon, Santa Lucia Mts. Comment
  CAS-BOT-BC110723  Aegilops cylindrica John Thomas Howell 1952-6-15 28366 Siskiyou Along road just east of Montague. Comment
  CAS-BOT-BC295591  Agnorhiza invenusta John Thomas Howell 1962-7-10 38433 Kern 1.5 mile south of Summit, Greenhorn Mountains 1950 Comment
  CAS-BOT-BC295618  Agnorhiza invenusta John Thomas Howell 1942-7-24 17050 Tulare East Fork of Kaweah River at Cold Spring Comment
  CAS-BOT-BC29519  Agoseris John Thomas Howell 1969-8-26 45956 Tulare Mineral King 2377 Comment
  CAS-BOT-BC15496  Agoseris X elata John Thomas Howell 1942-7-27 17306 Tulare Cliff Creek between Deer Creek and Pinto Lake Comment
  CAS-BOT-BC21371  Agoseris aurantiaca var. aurantiaca John Thomas Howell 1939-8-8 15188 Siskiyou Black Mt., Marble Mts. Comment
  CAS-BOT-BC15342  Agoseris heterophylla John Thomas Howell 1944-7-13 19746 Glenn Summit Ridge, north of Black Butte Comment
  CAS-BOT-BC22958  Agoseris heterophylla John Thomas Howell 1926-4-11 1825 Alameda Rancho Repose, Arroyo Mocho Comment
  CAS-BOT-BC13273  Agoseris monticola J. T. Howell 1940-8-1 15832 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC13238  Agoseris monticola John Thomas Howell 1943-7-20 18629 Nevada Near Castle Peak Comment
  CAS-BOT-BC13244  Agoseris monticola J. T. Howell 1960-7-21 35802 Plumas Lassen Volcanic National park, Drakesbad 1828 Comment
  UC710561  Agoseris parviflora John Thomas Howell 1943-7-20 18614 Nevada Castle Peak. Comment
  CAS-BOT-BC127567  Agropyron cristatum John Thomas Howell; Gordon H. True 1970-7-27 46933 Tulare Sierra Nevada. Kern Plateau. Forest border of Big Meadow, on the east side at Joughin Camp. Near corral. 2377 Comment
  UCD51985  Agrostis densiflora John Thomas Howell 1945-7-4 21271 Marin Inverness Ridge. Comment
  CAS-BOT-BC127403  Agrostis elliottiana John Thomas Howell 1955-6-14 30426 Shasta East of Whiskeytown. Comment
  CAS-BOT-BC127447  Agrostis elliottiana John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-4 52740 Calaveras Near Wallace. 66 Comment
  CHSC47598  Agrostis elliottiana John Thomas Howell 1954-5-18 29801 Amador Sierra Nevada. 2 miles nne of Buena Vista. 91 Comment
  CAS-BOT-BC126955  Agrostis exarata John Thomas Howell 1937-7-28 13604 Trinity Trinity River Canyon near Eagle Creek. Comment
  CAS-BOT-BC127198  Agrostis exarata John Thomas Howell 1947-6-4 23216 Marin Near radio station. Point Reyes Peninsula. Comment
  CAS-BOT-BC127200  Agrostis exarata John Thomas Howell 1945-6-24 21235 Marin Mount Tamalpais. Bartho Retreat. Comment
  CAS-BOT-BC127209  Agrostis exarata John Thomas Howell 1944-6-25 19661 Marin Between Santa Venetia and Chinese Camp. Comment
  CAS-BOT-BC127212  Agrostis exarata John Thomas Howell 1943-5-22 18125 Marin Deer Park near Fairfax. Comment
  CAS-BOT-BC127255  Agrostis exarata John Thomas Howell 1928-6-19 4033 Inyo Sourdough Canon [Canyon], Panamint Mountains near Panamint City. 2286 Comment
  RSA216187  Agrostis exarata J. T. Howell 1966-7-20 41992 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon. Comment
  UCD52388  Agrostis exarata John Thomas Howell 1945-6-20 21080 Lake Sawmill Flat, Bartlett Mountain. 1219 Comment
  UCD52435  Agrostis exarata John Thomas Howell 1926-7-26 2126 Plumas near Prattville. 1371 Comment
  CAS-BOT-BC139670  Agrostis gigantea John Thomas Howell 1944-6-25 19644 Marin Santa Ventia. Comment
  CAS-BOT-BC139692  Agrostis gigantea John Thomas Howell 1928-6-20 4052 Inyo Jail Canon [Canyon] near the Burro Mine, Panamint Mountains. 1066 Comment
  CAS-BOT-BC139484  Agrostis hallii John Thomas Howell 1943-5-9 17965 Marin San Rafael Hills. Comment
  CAS-BOT-BC139455  Agrostis hendersonii John Thomas Howell 1947-4-23 23062 Marin Drakes Estero west of Mount Vision. Comment
  SEINET237853  Agrostis hendersonii John Thomas Howell 1947-5-14 1411 Marin Drakes Estero WNW of Mount Vision. Comment
  RSA299277  Agrostis idahoensis J. T. Howell, Gordon H. True 1973-8-1 50232 Lassen Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville 2134 Comment
  CAS-BOT-BC138897  Agrostis pallens John Thomas Howell; Gordon H. True 1966-7-13 41980 Tulare Sierra Nevada. Kern Plateau. Dry Lake on Cherry Hill Road south of Big Meadow. 2377 Comment
  CAS-BOT-BC139042  Agrostis pallens John Thomas Howell 1939-7-16 s.n. Marin Fern Canyon, Mount Tamalpais. Comment
  RSA126481  Agrostis pallens J. T. Howell 1943-7-11 s.n. Marin Potrero Meadow, Mt. Tamalpais Comment
  UC905062  Agrostis pallens John Thomas Howell 1949-7-22 25587 Tulare Guyot Creek Sierra Nevada 3169 Comment
  CAS-BOT-BC138467  Agrostis variabilis John Thomas Howell 1940-8-1 15802 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC175412  Allenrolfea occidentalis John Thomas Howell 1973-7-25 50013 Merced Ingomar 30 Comment
  CAS-BOT-BC466722  Allium cratericola John Thomas Howell 1962-7-11 38556 Kern Northwest slope of Black Mt. Greenhorn Mountains 2133 Comment
  CAS-BOT-BC469339  Allium fimbriatum var. fimbriatum John Thomas Howell; Gordon H. True 1971-6-15 47716 Kern 0.5 mile south of Bodfish Gap on road to Havilah. 1097 Comment
  CAS-BOT-BC241  Allium howellii John Thomas Howell 1931-3-21 5915 Kern Maricopa Grade, 1 mile from Maricopa Comment
  CAS-BOT-BC472781  Allium neapolitanum John Thomas Howell 1969-4-20 45513 Marin 2nd and Shaver Streets, San Rafael Comment
  CAS-BOT-BC476607  Allium unifolium John Thomas Howell 1931-5-12 6469 Contra Costa Oakland Hills Comment
  CAS-BOT-BC478829  Allium vineale John Thomas Howell 1976-6-22 51809 Sonoma Sonoma Joe's Restaurant, Petaluma Comment
  CAS-BOT-BC170695  Alnus rhombifolia John Thomas Howell 1959-9-21 34744 Plumas Belden. Sierra Nevada 701 Comment
  RSA144  Alnus rhombifolia J. T. Howell 1927-7-21 452 Orange Santa Ana River, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC138084  Alopecurus aequalis var. aequalis John Thomas Howell 1950-7-14 26870 Tulare Sierra Nevada. South Fork of Kern River. Bakeoven Meadow. 2468 Comment
  CAS-BOT-BC138149  Alopecurus aequalis var. aequalis John Thomas Howell 1960-8-20 36223 Tehama Lassen Volcanic National Park. Morgan. 1463 Comment
  CAS-BOT-BC138000  Alopecurus geniculatus John Thomas Howell 1960-7-22 35882 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  POM303725  Amaranthus deflexus J. T. Howell 1944-7-23 19852 Marin Along sidewalks, San Rafael. 15 Comment
  SEINET7922931  Amaranthus retroflexus J. T. Howell 1963-8-20 40123 Kern South Fork Valley, about 2 miles NE of Weldon. 808 Comment
  CAS-BOT-BC13657  Ambrosia acanthicarpa John Thomas Howell 1952-10-27 28890 Tulare Eleven Range View Point, Sequoia Park 1590 Comment
  CAS-BOT-BC44904  Ambrosia chamissonis John Thomas Howell 1957-9-19 32968 San Francisco North side of Lone Mountain Comment
  CAS-BOT-BC55609  Ambrosia confertiflora John Thomas Howell 1956-11-4 31948 San Francisco Waterfront St near Mission Rock Terminal Comment
  CAS-BOT-BC272943  Ambrosia salsola John Thomas Howell 1930-5-13 4988 Kern 5 miles north of Ricardo Comment
  POM261632  Amelanchier pallida J. T. Howell 1940-6-1 15569 Mariposa Snow Creek Trail 1677 Comment
  CAS-BOT-BC135672  Amelanchier utahensis John Thomas Howell 1930-6-8 5287 Sonoma 8.5 miles n. of Bodega Bay Comment
  CAS-BOT-BC136786  Amelanchier utahensis John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1969-6-24 2436 Plumas Vicinity of mouth of Butterfly Creek 883 Comment
  CAS-BOT-BC142557  Amelanchier utahensis John Thomas Howell 1963-8-20 40172 Inyo Whitney Portal - Sierra Nevada 2545 Comment
  CAS-BOT-BC143010  Amelanchier utahensis John Thomas Howell 1940-8-9 16073 Fresno Between junction and Vidette Meadows - Bubbs Creek Comment
  CAS-BOT-BC222219  Amsinckia John Thomas Howell 1934-4-8 11826 Contra Costa South of Antioch Comment
  CAS-BOT-BC222231  Amsinckia John Thomas Howell 1933-3-29 10916 Contra Costa Pittsburg Comment
  GH424782  Amsinckia J. T. Howell 1933-4-15 11225 Unknown St. Mary's College Comment
  CAS-BOT-BC54158  Amsinckia menziesii John Thomas Howell 1934-6-16 12218 Modoc 5 mi. from Adin on road to Alturas. Comment
  CAS-BOT-BC54197  Amsinckia menziesii John Thomas Howell 1934-6-13 12085 Modoc Surprise Valley near Fort Bidwell. Comment
  CAS-BOT-BC45123  Anaphalis margaritacea John Thomas Howell 1940-7-29 15677 Fresno Between Charlotte Creek and Junction Meadow, Bubbs Creek Comment
  CAS-BOT-BC45159  Anaphalis margaritacea John Thomas Howell 1956-6-10 31533 San Francisco North slopes on Bay View Hills Comment
  UC485556  Ancistrocarphus filagineus Thomas Howell 1893-4-11 Kern Asphalto Comment
  UC485559  Ancistrocarphus filagineus Thomas Howell 1883-5-1 Contra Costa Antioch Comment
  GH355506  Andropogon virginicus J. T. Howell & J. W. Stacey 1936-7-26 12671 Unknown Pitkin Marsh, 5 miles north of Sebastopol, Sonoma County. Comment
  CAS-BOT-BC271456  Anisocarpus madioides John Thomas Howell 1945-6-20 21099 Lake Near Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC271413  Anisocarpus scabridus John Thomas Howell 1943-8-8 19174 Mendocino Anthony Peak Comment
  CAS-BOT-BC64774  Anisocoma acaulis John Thomas Howell; Gordon H. True 1968-5-13 44296 Tulare Cherry Hill Road, Poison Meadow Creek Canyon, Kern Plateau 1981 Comment
  CAS-BOT-BC63869  Antennaria argentea John Thomas Howell 1925-6-14 1153 El Dorado Emerald Bay Camp, Lake Tahoe Comment
  UCR89353  Antennaria dimorpha J. T. Howell, G. H. True 1970-6-24 46754 Tulare Kern Plateau, Sierra Nevada Mtns., Manter Meadow 2200 Comment
  CAS-BOT-BC77243  Antennaria microphylla John Thomas Howell 1946-7-14 22258 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC79887  Antennaria microphylla John Thomas Howell 1940-7-30 15712 Tulare East Lake 2926 Comment
  CAS-BOT-BC84736  Antennaria umbrinella John Thomas Howell 1946-7-24 22703 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC84750  Antennaria umbrinella John Thomas Howell 1950-7-22 27240 Tulare Summit ridge, Olancha Peak 3688 Comment
  CAS-BOT-BC280665  Anthoxanthum occidentale John Thomas Howell 1930-7-27 5396 Sonoma 1 mile north of Ft. Ross Comment
  CAS-BOT-BC137702  Anthoxanthum odoratum John Thomas Howell 1944-6-14 19628 San Francisco San Francisco. Laurel Hill Cemetery. Comment
  UC1040784  Anthriscus caucalis John Thomas Howell 1956-5-26 31448 Santa Clara Smith Creek; Mt. Hamilton Comment
  RSA223677  Anthriscus caucalis J. T. Howell 1957-6-17 32689 San Francisco Presidio, along south wall Comment
  CAS-BOT-BC237902  Antirrhinum ovatum John Thomas Howell 1948-6-14 24340 San Luis Obispo Headwaters of Bitterwater Creek, north end of Carrizo Plain 609 Comment
  RSA43307  Apiastrum angustifolium J. T. Howell 1948-6-15 24356 San Luis Obispo Red Hills southeast of Shandon. 762 Comment
  CAS-BOT-BC392138  Aquilegia formosa John Thomas Howell 1958-7-25 33907 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC395030  Aquilegia formosa John Thomas Howell 1944-8-16 20598 Tuolumne Mono Pass Trail Comment
  CAS-BOT-BC405358  Aquilegia formosa John Thomas Howell 1923-6-22 138 Mariposa Meadow at the Indian Bridge, Wawona 1219 Comment
  CAS-BOT-BC405757  Aquilegia formosa John Thomas Howell 1951-7-22 28149 Tulare Tranger Creek, sequoia park, on Mineral King road 1371 Comment
  RSA0129297  Arabis lemmonii J. T. Howell 1948-7-28 25097 Tulare Center Basin. 3659 Comment
  RSA88494  Arabis lyallii J. T. Howell 1951-7-21 28072 Tulare Marble, White Chief region; Mineral King and Vicinity. 2896 Comment
  RSA201482  Arceuthobium abietinum J. T. Howell 1962-9-24 38844 Kern Greenhorn mtn. On Abies magnifica var. shastensis north side of Sunday Peak. 2378 Comment
  UC1042594  Arceuthobium americanum John Thomas Howell 1950-7-18 27038 Tulare Bakeoven Meadows Sierra Nevada 2468 Comment
  CAS-BOT-BC407702  Arceuthobium americanum John Thomas Howell 1960-8-22 36405 Shasta Pond N of Summit Lake 2042 Comment
  CAS-BOT-BC410082  Arceuthobium occidentale John Thomas Howell 1955-6-14 30440 Butte near Magalia 731 Comment
  CAS-BOT-BC56911  Arctostaphylos John Thomas Howell 1934-3-3 11747 Sonoma Between Fort Ross and Stewart's Point Comment
  CAS-BOT-BC24119  Arctostaphylos auriculata John Thomas Howell 1931-5-12 6477 Contra Costa Nortonville Comment
  CAS-BOT-BC24087  Arctostaphylos bakeri John Thomas Howell 1933-4-2 10954 Sonoma 2 miles east of Occidental Comment
  CAS-BOT-BC25320  Arctostaphylos bakeri John Thomas Howell 1933-4-2 10956 Sonoma Serpentine ridge, 2 miles E of Occidental Comment
  UC518012  Arctostaphylos bakeri John Thomas Howell 1933-4-2 10956 Sonoma 2 mi e Occidental Comment
  CAS-BOT-BC24016  Arctostaphylos canescens subsp. canescens John Thomas Howell 1930-7-13 5362 Napa Crater Country Comment
  CAS-BOT-BC24028  Arctostaphylos canescens subsp. canescens John Thomas Howell 1926-2-28 1652 Marin Mt. Tamalpais, Rock Spring Trail Comment
  CAS-BOT-BC23886  Arctostaphylos canescens subsp. sonomensis John Thomas Howell 1937-4-11 12896 Sonoma Rincon Ridge NE of Santa Rosa Comment
  CAS-BOT-BC25152  Arctostaphylos crustacea John Thomas Howell 1953-2-1 28918 Santa Cruz Sand hills about 1 mile NW of Scott Valley Comment
  CAS-BOT-BC25116  Arctostaphylos crustacea subsp. insulicola John Thomas Howell 1931-4-10 6229 Santa Barbara Ravenswood, Santa Cruz Island. Comment
  CAS-BOT-BC25070  Arctostaphylos crustacea subsp. subcordata John Thomas Howell 1931-4-14 6370 Santa Barbara China Harbor, Santa Cruz Island. Comment
  GH342788  Arctostaphylos cushingiana f. repens J. T. Howell 1944-6-4 19353 Unknown Inverness Ridge Comment
  CAS-BOT-BC23371  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1955-5-17 30159 Monterey chaparral on Junipero Serra Peak, Santa Lucia Mts. Comment
  SBBG41732  Arctostaphylos glandulosa subsp. cushingiana J. T. Howell 1970-3-31 46498 Monterey Carmel River, Carmel Valley Village Comment
  CAS-BOT-BC23254  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1930-6-15 5311 Alameda Rocky summit of Grizzley Peak, Berkeley Hills Comment
  GH350364  Arctostaphylos glandulosa var. cushingiana J. T. Howell 1933-3-19 10866 A Unknown Slopes at head of Muir Woods Comment
  CAS-BOT-BC39074  Arctostaphylos insularis John Thomas Howell 1931-4-12 6308 Santa Barbara Santa Cruz Island, head of Cochie Canyon Comment
  UCD52160  Arctostaphylos manzanita John Thomas Howell 1975-6-15 51097 Butte In Upper Sonoran Zone on volcanic rock; about 2 miles from Paradise on 'Skyway' to Chico. 396 Comment
  UCD52243  Arctostaphylos manzanita John Thomas Howell 1976-4-2 51563 Butte In Upper Sonoran Life Zone on volcanic rock; about 2 miles from Paradise on 'Skyway' to Chico. 396 Comment
  UCD52246  Arctostaphylos manzanita John Thomas Howell 1976-4-2 51564 Butte In Upper Sonoran Life Zone on volcanic rock; about 2 miles from Paradise on 'Skyway' to Chico. 396 Comment
  CAS-BOT-BC38754  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1956-2-26 30917 Marin Along old railroad grade in W. Fk. of Fern Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC38882  Arctostaphylos manzanita subsp. manzanita J. T. Howell 1931-3-14 5772 Sonoma Vine Hill District, 10 miles west of Santa Rosa. Comment
  CAS-BOT-BC38483  Arctostaphylos mewukka subsp. truei John Thomas Howell 1975-7-22 51358 Plumas 2 miles northwest of Spring Garden 1173 Comment
  CAS-BOT-BC45588  Arctostaphylos myrtifolia John Thomas Howell 1960-11-10 36469 Amador Near Ione. Comment
  A350754  Arctostaphylos nevadensis J. T. Howell 1943-7-17 18506 Unknown West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC46457  Arctostaphylos patula John Thomas Howell 1939-8-3 15021 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC46665  Arctostaphylos patula John Thomas Howell; Gordon H. True 1970-5-27 46541 El Dorado N. Leonardi Spring. 1280 Comment
  UC1602054  Arctostaphylos patula Thos. Howell 1889-4-13 1378 Del Norte near Klamath River Comment
  RSA1387  Arctostaphylos rainbowensis J. T. Howell 1928-7-9 399 Riverside Temecula Grade, 4 miles S of Temecula. 396 Comment
  POM203935  Arctostaphylos tomentosa subsp. subcordata J. T. Howell 1931-4-14 6369 Santa Barbara Santa Cruz Island. China Harbor. Comment
  GH362174  Arctostaphylos truei J. T. Howell 1976-4-2 51571 Unknown Injun Jim Campground, North Feather River 609 Comment
  RSA381139  Arctostaphylos truei J. T. Howell 1975-6-15 51109 Butte Skyway near Billie Road, Paradise. 609 Comment
  RSA584780  Arctostaphylos truei J. T. Howell 1976-7-14 51817 Butte Just northeast of Pulga Bridge. 418 Comment
  UCD51945  Arctostaphylos truei John Thomas Howell 1975-6-15 51091 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  UCD51948  Arctostaphylos truei John Thomas Howell 1975-6-15 51086 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  CAS-BOT-BC46788  Arctostaphylos uva-ursi John Thomas Howell 1943-7-4 18270 Marin near Ledum Marsh Comment
  CAS-BOT-BC46824  Arctostaphylos virgata John Thomas Howell 1944-3-26 19342 Marin Inverness Ridge Comment
  LA42196  Arctostaphylos viscida subsp. mariposa John Thomas Howell; 1931-2-23 5753 Mariposa near Bear Valley Comment
  CAS-BOT-BC47138  Arctostaphylos viscida subsp. mariposa John Thomas Howell 1931-2-23 5753 Mariposa On rim of Merced River Canyon, 1 mi. from Bear Valley on road to Bagby. Comment
  CAS-BOT-BC47373  Arctostaphylos viscida subsp. viscida John Thomas Howell 1975-6-15 51086 Butte about 2 miles from Paradise on Skyway to Chico 396 Comment
  CAS-BOT-BC48293  Arctostaphylos viscida subsp. viscida John Thomas Howell 1975-6-15 51106 Butte Billie Road at Cliff Drive, Paradise 609 Comment
  CAS-BOT-BC467189  Arenaria serpyllifolia var. serpyllifolia John Thomas Howell 1935-5-5 12602 Sonoma Spontaneous in M.S. Baker garden near Kenwood Comment
  CAS-BOT-BC137614  Aristida adscensionis John Thomas Howell 1960-3-22 35142 San Luis Obispo San Luis Obispo. Santa Lucia Mountains. Cuesta Park. Comment
  CAS-BOT-BC17390  Armoracia rusticana John Thomas Howell 1961-9-25 36960 Plumas Sierra Nevada. Portola. 1478 Comment
  CAS-BOT-BC82276  Arnica chamissonis John Thomas Howell; Gordon H. True 1970-7-30 47157 Tulare Southwest end of Big Meadow just east of Cherry Hill Road, Kern Plateau 2377 Comment
  CAS-BOT-BC82253  Arnica chamissonis John Thomas Howell 1949-7-30 25935 Tulare The Tunnel 2712 Comment
  CAS-BOT-BC82318  Arnica cordifolia John Thomas Howell 1938-8-2 13997 Placer 5 miles n. of Brockway Comment
  CAS-BOT-BC295868  Arnica dealbata John Thomas Howell 1960-8-21 36309 Shasta Lassen Volcanic National Park. Sulphur Works 2133 Comment
  CAS-BOT-BC82455  Arnica discoidea John Thomas Howell 1925-4-5 944 Marin Pipeline Trail Comment
  CAS-BOT-BC82500  Arnica discoidea John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54222 Plumas About 5 miles southeast of Mt. Hough on the road to Quincy 1584 Comment
  CAS-BOT-BC85126  Arnica mollis John Thomas Howell 1944-8-8 20107 Tuolumne Between Elizabeth Lake and Tuolumne Meadows Comment
  CAS-BOT-BC89980  Arnica mollis John Thomas Howell 1944-8-10 20239 Mono Glacier Canyon, Mt. Dana Comment
  CAS-BOT-BC85076  Arnica nevadensis John Thomas Howell 1943-8-10 19250 Glenn Black Butte Comment
  CAS-BOT-BC85104  Arnica nevadensis John Thomas Howell 1942-8-5 17757 Tulare Big Arroyo near Little Five Lakes Comment
  CAS-BOT-BC85110  Arnica nevadensis John Thomas Howell 1963-7-9 39659 El Dorado Sierra Nevada - Near foot of Echo Summit grade, 1 mile southwest of Meyers. 2011 Comment
  CAS-BOT-BC90122  Artemisia biennis John Thomas Howell 1961-9-24 36915 Plumas Feather River bed sw. of Beckwourth 1487 Comment
  CAS-BOT-BC90136  Artemisia biennis John Thomas Howell 1927-10-29 3186 Los Angeles Salt marshes near Alamitos Bay 15 Comment
  CAS-BOT-BC93971  Artemisia douglasiana John Thomas Howell; Gordon H. True 1969-9-30 46374 Tulare Sierra Nevada - Cherry Hill Road 4 miles from Burton Camp, canyon of Poison Meadow Creek, Kern Plateau 2194 Comment
  CAS-BOT-BC90491  Artemisia douglasiana John Thomas Howell 1926-11-14 2253 Sonoma Two miles east of Santa Rosa Comment
  CAS-BOT-BC90735  Artemisia ludoviciana subsp. incompta John Thomas Howell 1940-7-30 15692 Tulare East Lake 2926 Comment
  CAS-BOT-BC90897  Artemisia pycnocephala John Thomas Howell 1963-9-4 40333 Monterey Sand dunes, Moss Landing Comment
  CAS-BOT-BC93672  Artemisia pycnocephala John Thomas Howell 1927-3-18 2287 San Francisco Summit of Lone Mountain, San Francisco 121 Comment
  CAS-BOT-BC93613  Artemisia rothrockii John Thomas Howell 1958-8-14 34442 Madera Sierra Nevada - Ne. of Sadler Lake - East Fork of Granite Creek 3200 Comment
  CAS-BOT-BC97222  Artemisia spinescens John Thomas Howell 1928-4-2 3669 Inyo [Dante's] Dantes View of Death Valley, Black Mts. Comment
  CAS-BOT-BC97236  Artemisia suksdorfii John Thomas Howell 1931-6-17 6731 Del Norte 5 miles s. of Crescent City Comment
  CAS-BOT-BC93568  Artemisia tridentata subsp. tridentata John Thomas Howell 1970-11-9 47552 Kern Sierra Nevada - 1.5 miles east of Onyx 853 Comment
  CAS-BOT-BC99289  Artemisia tridentata subsp. vaseyana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54433 Amador Small lake on Carson Pass Road just west of Carson Spur near Kirkwood - Sierra Nevada 2407 Comment
  CAS-BOT-BC400497  Asarum caudatum John Thomas Howell 1925-3-1 767 Alameda San Leandro Canon [Canyon], Oakland Hills Comment
  RSA563  Asclepias eriocarpa J. T. Howell 1927-7-16 417 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  SEINET10580440  Asclepias eriocarpa John Thomas Howell 1940-6-29 Howell 15586 Lake Middletown Comment
  CAS-BOT-BC478842  Asparagus officinalis John Thomas Howell 1954-9-5 30029 San Joaquin Along highway near Holt Comment
  CAS-BOT-BC177505  Astragalus austiniae John Thomas Howell 1943-7-18 18540 Nevada Castle Peak Comment
  UC517971  Astragalus claranus John Thomas Howell 1931-4-19 6442 Napa Conn Valley Comment
  CAS-BOT-BC187302  Astragalus lentiginosus var. kernensis John Thomas Howell 1950-7-17 27028 Tulare Templeton Meadows 2590 Comment
  CAS-BOT-BC187458  Astragalus lentiginosus var. variabilis John Thomas Howell 1927-6-12 2506 San Bernardino Deadman's Point, Mojave Desert 914 Comment
  RSA44203  Astragalus monoensis J. T. Howell 1948-8-1 25278 Mono 3 miles south of Crestview. Comment
  CAS-BOT-BC178014  Astragalus nuttallii var. nuttallii John Thomas Howell; Alice Eastwood 1935-1-28 1926 Monterey Point Pinos Comment
  CAS-BOT-BC192804  Astragalus pauperculus John Thomas Howell 1927-4-5 2304 Shasta Near Frazier Corners, 10 miles ne. of Redding Comment
  SEINET948657  Astragalus pulsiferae John Thomas Howell 1955-1 30818 Lassen East side of Beckwourth Pass. Sierra Nevada 1494 Comment
  CAS-BOT-BC193114  Astragalus pycnostachyus var. pycnostachyus John Thomas Howell 1945-8-19 21433 Marin At head of Drakes Bay Comment
  RSA28249  Athyrium americanum J. T. Howell 1951-7-18 27890 Tulare Franklin Pass Trail, Mineral King and vicinity 3354 Comment
  CAS-BOT-BC69511  Athyrium filix-femina var. californicum John Thomas Howell 1968-7-20 44572 Tuolumne Near White Wolf on Tioga Pass Road. Comment
  CAS-BOT-BC17398  Athysanus pusillus John Thomas Howell 1965-4-25 41104 Madera Sierra Nevada. 3 miles northeast of Coarsegold. 762 Comment
  CAS-BOT-BC44941  Athysanus pusillus John Thomas Howell 1972-4-25 s.n. Mariposa In campground between Camp Curry and Happy Isles, Yosemite Valley 1219 Comment
  CAS-BOT-BC16339  Athysanus unilateralis John Thomas Howell 1931-3-29 6025 San Benito 11 miles from Hernandez on road to San Benito. Comment
  CAS-BOT-BC168633  Atriplex John Thomas Howell 1967-11-4 44073 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC170599  Atriplex John Thomas Howell; Gordon H. True 1967-7-6 43238 Tulare Vernal pool nutural area in Valley Grassland, about 4 1/2 miles east-northeast of Pixley, near SW corner of area. 83 Comment
  CDA23229  Atriplex argentea var. mohavensis J. T. Howell 1973-10-31 50265 San Joaquin Along Highway 50 at Hospital Creek southeast of Vernalis. 0 Comment
  UC1106144  Atriplex californica John Thomas Howell 1944-9-10 20734 Marin n Inverness (Shell Beach); n of Inverness, Shell Beach Comment
  UCD97294  Atriplex canescens John Thomas Howell; Gordon H. True 1971-6-16 47882 Kern along Kelso Creek 7 miles south of Weldon on road to Kelso Valley. 914 Comment
  CAS-BOT-BC170197  Atriplex canescens subsp. canescens John Thomas Howell 1927-10-22 3161 Orange In hills on n. side of Santa Ana Canyon. 152 Comment
  CAS-BOT-BC168291  Atriplex canescens var. canescens John Thomas Howell 1927-7-9 2709 San Bernardino Cactus Flat, desert side of San Bernardino Mts. 1828 Comment
  CAS-BOT-BC168531  Atriplex confertifolia John Thomas Howell 1930-6-28 5324 San Joaquin Banta Junction, about 1 mile from Banta Comment
  RSA8515  Atriplex joaquinana J. T. Howell 1933-7-20 11440 Alameda Livermore Valley near Livermore Comment
  CAS-BOT-BC176496  Atriplex polycarpa John Thomas Howell 1927-11-13 3197 Kern Red Rock [Canon] Canyon 762 Comment
  CAS-BOT-BC176583  Atriplex polycarpa John Thomas Howell 1967-11-4 44083 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC176753  Atriplex serenana var. serenana John Thomas Howell 1973-11-4 50326 Monterey King City 100 Comment
  CAS-BOT-BC180868  Atriplex serenana var. serenana John Thomas Howell 1969-10-20 46475 Stanislaus 5 miles from La Grange on road to Modesto - Sierra Nevada 60 Comment
  UC473576  Atriplex triangularis John Thomas Howell 1931-10-31 8163 Contra Costa Bay Point Comment
  CAS-BOT-BC99871  Baccharis sergiloides John Thomas Howell 1928-1-30 3313 Riverside Cottonwood Spring, Colorado Desert Comment
  CAS-BOT-BC106579  Baileya pleniradiata John Thomas Howell 1927-8-1 2892 San Bernardino Between Morongo Valley and Warren's Well, s. Mojave Desert 914 Comment
  CAS-BOT-BC100014  Balsamorhiza deltoidea John Thomas Howell 1962-5-23 37404 Kern Kern River Canyon near Miracle Hot Springs 731 Comment
  CAS-BOT-BC106497  Balsamorhiza hookeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49167 Lassen In open yellow pine forest, Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  CAS-BOT-BC106459  Balsamorhiza hookeri John Thomas Howell 1978-4-14 52860 Plumas On edge of pine woods, west of Portola - Sierra Nevada Comment
  CAS-BOT-BC16412  Barbarea orthoceras John Thomas Howell 1943-8-3 18939 Glenn Plaskett Meadows. 1828 Comment
  CAS-BOT-BC16444  Barbarea orthoceras John Thomas Howell 1941-8-3 16717 Madera Near Garnett Lake. 2956 Comment
  GH378733  Barbarea orthoceras J. T. Howell 1975-6-29 51325 Unknown Goodhill & Diablo roads, Kentfield Comment
  UC1176817  Barbarea orthoceras John Thomas Howell 1950-3-28 26305 Marin Pt. Reyes Peninsula on road to lighthouse Comment
  CAS-BOT-BC145779  Beckmannia syzigachne John Thomas Howell 1946-6-13 22019 Marin Hicks Valley. Comment
  CAS-BOT-BC75570  Berberis dictyota John Thomas Howell 1963-6-22 39559 Monterey Priest Valley. 685 Comment
  CAS-BOT-BC75767  Berberis pinnata John Thomas Howell 1969-4-22 45540 Amador Sierra Nevada. Volcano. 609 Comment
  RSA800  Bidens laevis J. T. Howell 1927-10-23 768 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC413093  Bistorta bistortoides John Thomas Howell 1942-8-1 17535 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  JEPS53177  Boechera breweri John Thomas Howell 1927-4-7 2311 Shasta above McCloud River (on Potter Creek, w slope of Horse Mt.); Horse Mt., Potter Creek 304 Comment
  CAS-BOT-BC15940  Boechera breweri subsp. breweri John Thomas Howell 1937-5-19 12955 San Benito The Pinnacles. Comment
  CAS-BOT-BC16139  Boechera constancei John Thomas Howell 1974-9-20 40896 Plumas Sierra Nevada. About 2 miles from Spring Garden on road to Quincy. 1158 Comment
  CAS-BOT-BC16162  Boechera davidsonii John Thomas Howell 1947-8-7 23849 Inyo Big Pine Lakes. West of Sixth Lake. 3413 Comment
  CAS-BOT-BC16222  Boechera depauperata John Thomas Howell 1940-8-8 16037 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC13815  Boechera howellii John Thomas Howell 1937-7-25 13444 Siskiyou Caribou Basin, Salmon-Trinity Alps. 2286 Comment
  CAS-BOT-BC13823  Boechera howellii John Thomas Howell 1949-7-23 25644 Tulare Soldier Lake. 3352 Comment
  CAS-BOT-BC16297  Boechera howellii John Thomas Howell 1946-7-22 22614 Fresno Mount Hopkins. Comment
  CAS-BOT-BC13966  Boechera lemmonii John Thomas Howell 1949-8-4 26009 Tulare Ridge west of Siberian Pass. 3352 Comment
  CAS-BOT-BC13994  Boechera lemmonii John Thomas Howell 1941-8-2 16710 A Madera Near Thousand Island Lake. Comment
  CAS-BOT-BC14031  Boechera lemmonii John Thomas Howell 1942-7-25 17140 Tulare Mineral King. Comment
  CAS-BOT-BC95735  Boechera pauciflora John Thomas Howell 1934-6-13 12102 Modoc North fork of Barber Creek, Warner Mts. 1828 Comment
  CAS-BOT-BC14198  Boechera pinetorum John Thomas Howell 1938-8-10 14464 Madera Near Devil's Postpile. Comment
  CAS-BOT-BC14390  Boechera platysperma John Thomas Howell 1943-7-17 18449 Nevada West side of Donner Pass near Norden. 2133 Comment
  CAS-BOT-BC14553  Boechera pulchra John Thomas Howell 1950-7-26 27358 Inyo Summit Creek, east of Olancha Pass. 2773 Comment
  CAS-BOT-BC14623  Boechera pygmaea John Thomas Howell 1949-8-13 25263 Inyo Little Cottonwood Creek. 3048 Comment
  CAS-BOT-BC14659  Boechera rectissima John Thomas Howell; Harvey Keith Wagnon 1980-5-26 53603 Plumas Sierra Nevada. 10 miles east of Virgilia on road to Quincy. Comment
  CAS-BOT-BC25278  Boechera repanda John Thomas Howell 1962-9-23 38812 Kern Sierra Nevada. Greenhorn Mountains. Near Tiger Flat. 1981 Comment
  CAS-BOT-BC25494  Boechera retrofracta John Thomas Howell 1946-7-17 22488 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC16275  Boechera shockleyi John Thomas Howell 1942-8-3 17628 Tulare Kaweah Gap. Comment
  CAS-BOT-BC25958  Boechera tularensis John Thomas Howell 1950-7-21 27158 Tulare Monache Mountain. 2590 Comment
  CAS-BOT-BC28045  Boechera xylopoda John Thomas Howell 1958-5-22 33158 Tulare Sierra Nevada. Kern River Canyon 6 miles south of Roads End P.O. 944 Comment
  CAS-BOT-BC434512  Boerhavia diffusa John Thomas Howell; R. C. Barneby 1954-5-8 29211 Tulare Tule River Canyon, 2.5 miles above Springville 411 Comment
  CAS-BOT-BC7642  Bolboschoenus maritimus John Thomas Howell 1945-8-19 21438 Marin Head of Drakes Bay. Comment
  CAS-BOT-BC145404  Brachypodium distachyon John Thomas Howell 1971-4-12 s.n. San Mateo Butano State Park. Comment
  SEINET944633  Brachypodium distachyon John Thomas Howell 1959-1 Sonoma Hills east of Agua Caliente, Sonomo County. Comment
  CAS-BOT-BC36840  Brassica tournefortii John Thomas Howell 1977-3-10 52322 San Diego Colorado Desert. Borrego Springs. 182 Comment
  CAS-BOT-BC100449  Brickellia californica John Thomas Howell 1931-9-6 8032 San Benito Gravelly bed of San Benito River, 3 miles north of Paicines Comment
  CAS-BOT-BC106281  Brickellia californica John Thomas Howell 1958-7-28 34045 Fresno Blue Canyon Creek east of Tehipite Valley, Middle Fork of the Kings River - Sierra Nevada 1432 Comment
  UCD129632  Brickellia californica John Thomas Howell 1950-11-9 27482 Los Angeles 4 miles south of Newhall on Foothill Blvd. Comment
  CAS-BOT-BC100440  Brickellia californica John Thomas Howell 1931-10-12 8153 Mariposa 2.5 miles east of Coulterville Comment
  CAS-BOT-BC145517  Briza minor John Thomas Howell 1925-5-17 1068 Merced Hopeton Bridge on the Merced River. Comment
  CAS-BOT-BC486549  Brodiaea terrestris subsp. kernensis John Thomas Howell 1963-6-22 39572 Monterey Priest Valley 685 Comment
  CAS-BOT-BC149342  Bromus arizonicus John Thomas Howell 1956-3-21 31125 Los Angeles Ridge Route west of Newhall. Comment
  CAS-BOT-BC149358  Bromus arizonicus John Thomas Howell 1932-3-13 8226 Ventura San Nicolas Island. Comment
  CAS-BOT-BC149371  Bromus arizonicus John Thomas Howell 1956-3-22 31128 San Luis Obispo Shandon. Comment
  CAS-BOT-BC149367  Bromus arizonicus John Thomas Howell 1960-3-22 35140 San Luis Obispo At the mission. San Luis Obispo. Comment
  RSA43  Bromus arvensis J. T. Howell 1927-6-17 153 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC149402  Bromus berteroanus John Thomas Howell 1956-3-25 31199 Monterey Roadside, Salinas Valley, 6.5 miles from King City on Arroyo Seco Road. Comment
  CAS-BOT-BC149076  Bromus carinatus var. carinatus John Thomas Howell 1955-6-14 30412 Trinity Weaverville. 609 Comment
  CAS-BOT-BC149180  Bromus carinatus var. carinatus John Thomas Howell 1938-6-19 13912 Marin Cacade Canyon, Mill Valley. Comment
  CAS-BOT-BC149227  Bromus carinatus var. carinatus John Thomas Howell 1963-5-5 39055 Monterey Mustang Grade, west of Priest Valley. 670 Comment
  CAS-BOT-BC149320  Bromus carinatus var. carinatus John Thomas Howell 1959-9-21 34829 Plumas Sierra Nevada. Greenville. 1088 Comment
  CAS-BOT-BC149324  Bromus carinatus var. carinatus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-25 54305 Plumas Sierra Nevada. East side of Indian Valley just north of Taylorsville. 1112 Comment
  CAS-BOT-BC148711  Bromus carinatus var. marginatus John Thomas Howell 1975-7-22 51369 Plumas Sierra Nevada. 2 miles northwest of Spring Garden. 1173 Comment
  CAS-BOT-BC148706  Bromus carinatus var. marginatus John Thomas Howell 1960-7-23 35930 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  CAS-BOT-BC156152  Bromus catharticus John Thomas Howell 1950-7-13 26777 Tulare Sierra Nevada. South Fork of the Kern River. Bakeoven Meadows. 2468 Comment
  CAS-BOT-BC156216  Bromus catharticus John Thomas Howell 1963-11-19 40413 Monterey Pacific Grove. Comment
  CAS-BOT-BC156281  Bromus catharticus John Thomas Howell 1960-3-24 35147 Riverside Hemet. Comment
  GH361780  Bromus catharticus J. T. Howell 1956-5-23 31446 Unknown El Camino Real at Atherton Ave., Menlo Park Comment
  CAS-BOT-BC155812  Bromus catharticus John Thomas Howell 1956-3-10 30919 Ventura Ventura. Along street, Thompson Boulevard and Chrisman Avenue. Comment
  CAS-BOT-BC155924  Bromus ciliatus John Thomas Howell 1944-8-11 20318 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC155967  Bromus commutatus John Thomas Howell 1955-7-20 30867 Plumas Sierra Nevada. Mohawk. 1371 Comment
  CAS-BOT-BC155971  Bromus commutatus John Thomas Howell 1962-6-18 37814 Plumas Sierra Nevada. Sierra Valley 5 miles south of Beckwourth. 1493 Comment
  CAS-BOT-BC155662  Bromus diandrus John Thomas Howell; Walter Knight; Irja Knight 1987-6-4 6228 Sonoma Tood Road Preserve. 24 Comment
  CAS-BOT-BC155516  Bromus hallii John Thomas Howell 1942-8-5 17675 Tulare Between Big Arroyo and Chagoopa Plateau. 3048 Comment
  CAS-BOT-BC155059  Bromus hordeaceus John Thomas Howell 1962-6-18 37754 Plumas Sierra Nevada. Sierra Valley near Beckwourth. 1487 Comment
  CAS-BOT-BC155118  Bromus hordeaceus John Thomas Howell 1957-5-17 32275 San Francisco San Francisco. Bayview Hills. Comment
  CAS-BOT-BC155274  Bromus hordeaceus John Thomas Howell 1954-5-9 s.n. Tulare Sierra Nevada. 4.5 miles southwest of Badger. 609 Comment
  CAS-BOT-BC155348  Bromus japonicus John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-7-10 2169 Plumas Sierra Nevada. Butterfly Botanical Area and Vicinity. Mouth of Butterfly Creek. 883 Comment
  SEINET10966937  Bromus macrostachys John Thomas Howell 1947-4-27 Howell 23096 Marin Steep grassy slope in clay soil, Bald Mt. west of San Anselmo. Comment
  CAS-BOT-BC162321  Bromus madritensis John Thomas Howell 1963-5-5 39059 Monterey Mustang Grade, west of Priest Valley. 670 Comment
  CAS-BOT-BC162374  Bromus madritensis John Thomas Howell 1964-4-28 40588 Mariposa Sierra Nevada. Granitic country just south of Morman Bar on road to Ben Hur. 548 Comment
  GH361840  Bromus madritensis J. T. Howell 1944-6-8 Unknown Phoenix Lake, Mt. Tamalpais Comment
  RSA126468  Bromus maritimus J. T. Howell 1946-6-30 22147 Marin Rodeo Lagoon Comment
  CAS-BOT-BC162116  Bromus orcuttianus John Thomas Howell 1954-6-6 29944 Tuolumne Sierra Nevada. Twain Harte. 1127 Comment
  CAS-BOT-BC161926  Bromus rubens John Thomas Howell 1958-5-24 33287 Inyo Sierra Nevada. Whitney Portal Road. 2346 Comment
  CAS-BOT-BC161941  Bromus rubens John Thomas Howell 1960-6-6 35341 Fresno Sierra Nevada. Copper Creek Trail, Kings Canyon. 1676 Comment
  CAS-BOT-BC161957  Bromus rubens John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52888 Calaveras Foothills near Wallace. 66 Comment
  RSA224272  Bromus stamineus J. T. Howell 1956-4-22 31282 San Francisco Embarcadero at Vallejo St. Comment
  RSA99654  Bromus stamineus J. T. Howell 1953-5-23 28999 Tuolumne Sonora 549 Comment
  UCD59690  Bromus sterilis John Thomas Howell 1965-5-5 41266 Alameda Juana Ave. near Morgan Ave., Alameda. Comment
  UC710524  Bromus suksdorfii John Thomas Howell 1943-7-14 18325 Nevada near Norden (w side of Donner Pass); Donner Pass 2133 Comment
  CAS-BOT-BC161438  Bromus tectorum John Thomas Howell; Gordon H. True 1971-6-17 48085 Kern Sierra Nevada. Roadside, 4 miles east of Bodfish Gap. 1767 Comment
  CAS-BOT-BC161487  Bromus tectorum John Thomas Howell 1948-7-31 25248 Inyo Kearsarge Pass Trail. 2895 Comment
  CAS-BOT-BC161519  Bromus tectorum John Thomas Howell 1957-5-19 32357 Stanislaus Del Puerto Canyon. Comment
  RSA126469  Bromus vulgaris J. T. Howell 1945-7-4 21268 Marin California Academy of Sciences; Inverness Ridge Comment
  UCD114951  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin Above high tide line, Muir Beach. Comment
  CAS-BOT-BC36900  Cakile maritima var. maritima John Thomas Howell 1963-9-4 40332 Monterey Moss Landing. Comment
  CAS-BOT-BC185416  Calamagrostis bolanderi John Thomas Howell 1953-7-16 29118 Mendocino 3 miles east of Point Arena. Comment
  CAS-BOT-BC185372  Calamagrostis canadensis John Thomas Howell 1941-8-9 16899 Madera Near Garnet Lake. 2956 Comment
  GH341548  Calamagrostis canadensis J. T. Howell 1941-8-6 16801 Unknown Between Shadow and Garnet lakes, Madera Co. Comment
  SEINET10933881  Calamagrostis canadensis John Thomas Howell 1944-8-7 Howell 20061 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC185266  Calamagrostis koelerioides John Thomas Howell 1937-7-25 13451 Siskiyou Caribou Basin, Salmon Trinity Alps. 2286 Comment
  RSA88127  Calamagrostis koelerioides J. T. Howell 1951-6-26 27537 Plumas Feather River Canyon; Sierra Nevada. 854 Comment
  CAS-BOT-BC185297  Calamagrostis muiriana John Thomas Howell 1947-8-5 23767 Inyo Big Pine Lakes. Fifth Lake. 3352 Comment
  CAS-BOT-BC185106  Calamagrostis ophitidis John Thomas Howell 1966-5-25 41535 Marin John Thomas Howell Botanical Garden, Tiburon. Just north of garden area. Comment
  CAS-BOT-BC185074  Calamagrostis purpurascens John Thomas Howell 1946-7-24 22704 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC185021  Calamagrostis rubescens John Thomas Howell 1946-9-15 23004 Marin Mount Tamalpais. Near Willow Meadow. Comment
  CAS-BOT-BC184997  Calamagrostis stricta subsp. inexpansa John Thomas Howell 1949-5-25 25338 Marin Point Reyes Peninsula. Behind dunes. Comment
  GH341600  Calamagrostis stricta subsp. inexpansa J. T. Howell 1944-8-5 19917 Unknown Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC438461  Calandrinia ciliata John Thomas Howell 1956-3-24 31176 Monterey Santa Lucia Mountains. Near San Antonio Mission Comment
  UCD129662  Calendula officinalis John Thomas Howell 1972-6-25 48891 Solano about 2 miles west of Benecia. Comment
  CAS-BOT-BC85677  Calocedrus decurrens John Thomas Howell; Gordon H. True 1968-5-13 44301 Tulare Sierra Nevada, Kern Plateau - cherry Hill road, Poison Meadow Creek Canyon 2255 Comment
  CAS-BOT-BC85707  Calocedrus decurrens John Thomas Howell 1936-8-24 12758 Trinity Summit of Scotts Mts. N. of Carrville Comment
  CAS-BOT-BC483209  Calochortus albus John Thomas Howell 1937-5-20 12989 Santa Clara Coyote Creek, 3 miles east of Madrone Comment
  CAS-BOT-BC487891  Calochortus invenustus John Thomas Howell; Gordon H. True 1970-6-26 46823 Tulare True Meadow, Kern Plateau, Sierra Nevada 2225 Comment
  RSA121  Calochortus plummerae J. T. Howell 1928-6-30 1022 Ventura Santa Susana Pass. 457 Comment
  CAS-BOT-BC496783  Calochortus venustus John Thomas Howell 1923-7-25 156 Mariposa Meadow Road, Wawona 1219 Comment
  CAS-BOT-BC181490  Caltha leptosepala John Thomas Howell 1943-7-18 18554 Nevada Meadow nw. of Castle Peak Comment
  JEPS62628  Calycadenia fremontii J. Thomas Howell 1969-8-4 45875 Shasta about 9 mi ne of Cottonwood Comment
  CAS-BOT-BC273456  Calycadenia mollis John Thomas Howell 1931-10-11 8142 A Mariposa Near Usona P. O. Comment
  CAS-BOT-BC270610  Calycadenia multiglandulosa John Thomas Howell 1963-8-7 40081 Monterey Mustang Grade between Mustang Summit and San Lorenzo Creek Comment
  RSA584737  Calycadenia oppositifolia J. T. Howell 1955-6-15 s.n. Butte West Branch of North Fork of Feather River. 183 Comment
  CAS-BOT-BC270835  Calycadenia pauciflora John Thomas Howell 1930-10-19 5626 Napa 5 miles from Aetna Springs on Butts Canyon road to Middletown, near Napa - Lake County line Comment
  CAS-BOT-BC90928  Calycanthus occidentalis John Thomas Howell 1967-6-22 42640 Butte Sierra Nevada. 1 mile southwest of Pulga Bridge Canyon of the Feather River North Fork. Comment
  CAS-BOT-BC215834  Calystegia purpurata subsp. purpurata John Thomas Howell 1933-8-19 11597 Monterey Carmel Valley, 11 miles east of Carmel Comment
  CAS-BOT-BC215886  Calystegia purpurata subsp. purpurata John Thomas Howell 1940-5-26 15531 Marin Little Carson Falls Comment
  CAS-BOT-BC224344  Calystegia subacaulis subsp. subacaulis John Thomas Howell 1956-5-6 31341 San Francisco Sierra & 22nd Sts., San Francisco Comment
  CAS-BOT-BC160776  Camissonia kernensis subsp. kernensis John Thomas Howell; Gordon H. True 1971-6-16 47873 Kern Along Kelso Creek, 7 miles south of Weldon on road to Kelso Valley 914 Comment
  UC1042536  Campanula angustiflora John Thomas Howell 1946-5-12 21818 Marin Carson country Comment
  SEINET10462954  Campanula prenanthoides Howell 1936-8-26 Howell 12821 Trinity Near junction of Tangle Blue and Scott Mountain creeks Comment
  SEINET10463090  Campanula prenanthoides Howell 1937-7-26 Howell 13561 Siskiyou Between Big Flat and Caribou Gulch Comment
  CAS-BOT-BC37316  Cardamine breweri John Thomas Howell 1942-7-24 17070 Tulare Mineral King. Comment
  CAS-BOT-BC37320  Cardamine breweri John Thomas Howell; Gordon H. True 1966-7-11 41763 Tulare Sierra Nevada. Kern Plateau. Horse Meadow. 2255 Comment
  CAS-BOT-BC281738  Carduus pycnocephalus John Thomas Howell 1933-5-14 11246 Contra Costa Hills E of St Mary's College Comment
  JEPS59102  Carduus pycnocephalus subsp. pycnocephalus J. Thomas Howell 1940-6-4 San Francisco on the marina, San Francisco San Francisco Marina Comment
  CAS-BOT-BC18219  Carex John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-25 53000 Calaveras Sierra Nevada. Dorrington. 1463 Comment
  CAS-BOT-BC18233  Carex John Thomas Howell 1945-9-29 21539 El Dorado Between Lake of the Woods and Desolation Valley. Comment
  CAS-BOT-BC18524  Carex abrupta John Thomas Howell 1946-7-28 22811 Inyo Rock Creek Lake Basin. Long Lake. 3230 Comment
  CAS-BOT-BC18551  Carex abrupta John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54511 Mono Sierra Nevada. Rock Creek Road to Rock Creek Lake Basin. 2849 Comment
  CAS-BOT-BC19765  Carex abrupta John Thomas Howell 1939-8-9 15192 Siskiyou Marble Mountains. Sky High Valley. 1828 Comment
  CAS-BOT-BC20320  Carex abrupta John Thomas Howell; Gordon H. True 1971-7-14 48462 A Tulare Sierra Nevada. Kern Plateau. West end of Deadwood Meadow (about 1.5 mile northwest of Sirretta Peak.) 2804 Comment
  CAS-BOT-BC20328  Carex abrupta John Thomas Howell 1949-7-19 25519 Tulare Rock Creek. 3200 Comment
  SD71030  Carex angustata John Thomas Howell 1960-7-23 35945 Plumas Lassen volcanic National Park; Drakesbad; meadow near soda spring. 1676 Comment
  CAS-BOT-BC17980  Carex aquatilis John Thomas Howell 1943-8-5 19064 A Glenn Plaskett Meadows. In open part of north meadows. 1828 Comment
  CAS-BOT-BC17988  Carex aquatilis John Thomas Howell 1941-7-25 16458 Madera Agnew Meadows. Comment
  RSA44305  Carex aquatilis J. T. Howell 1947-8-13 24055 Inyo Big Pine Lakes Trail 2744 Comment
  CAS-BOT-BC18078  Carex athrostachya John Thomas Howell 1946-7-14 22314 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC19004  Carex athrostachya John Thomas Howell; Gordon H. True 1967-7-4 42960 Tulare Sierra Nevada. Kern Plateau. Troy Meadow. 2377 Comment
  SEINET7550707 Image available Carex athrostachya John Thomas Howell 1934-7-7 12472 Lassen Pine Creek Flat. Comment
  CAS-BOT-BC19069  Carex aurea John Thomas Howell 1958-7-25 33914 Fresno Sierra Nevada. Middle Fork of the Kings River. Simpson Meadow. 1828 Comment
  RSA51982  Carex aurea J. T. Howell 1949-7-26 25780 Tulare Whitney Meadows. 2957 Comment
  RSA43280  Carex barbarae J. T. Howell 1944-6-11 s.n. Santa Cruz About 1 mile east of Felton. Comment
  CAS-BOT-BC19376  Carex barbarae John Thomas Howell 1980-10-6 53903 Stanislaus Sierra Nevada. Stanislaus River near Ripon. At Caswell Memorial State Park. 15 Comment
  CAS-BOT-BC19557  Carex bolanderi John Thomas Howell 1937-7-21 13197 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  UC905002  Carex bolanderi John Thomas Howell 1944-6-4 19540 Marin w Inverness; Inverness Ridge Comment
  CAS-BOT-BC19590  Carex brainerdii John Thomas Howell 1962-7-10 38439 Kern Sierra Nevada. Greenhorn Mountains. 1.5 mile south of Summit. 1950 Comment
  POM304482  Carex brainerdii J. T. Howell 1940-5-31 15550 Mariposa Yosemite Valley. Comment
  CAS-BOT-BC34033  Carex brevicaulis John Thomas Howell 1946-4-14 21628 Marin Near Dillons Beach. Comment
  CAS-BOT-BC34060  Carex brevicaulis John Thomas Howell 1938-4-12 13766 San Francisco Lake Merced, San Francisco. Comment
  SD72069  Carex brevicaulis John Thomas Howell 1968-4-18 4419 a Monterey About 4 miles east of Monterey near the airport, forming turfy patches on open flats in sandy soil. Comment
  SEINET10752418  Carex brevicaulis John Thomas Howell 1956-6-10 Howell 31549 San Francisco North slope of Bay View Hills. Comment
  CAS-BOT-BC34120  Carex breweri John Thomas Howell 1947-8-11 24019 Inyo South end of Coyote Ridge. 3657 Comment
  CAS-BOT-BC34247  Carex capitata John Thomas Howell 1946-7-26 22750 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC34260  Carex capitata John Thomas Howell 1948-7-26 25071 Tulare Center Basin. 3413 Comment
  CAS-BOT-BC34316  Carex congdonii John Thomas Howell 1949-8-12 26229 Inyo Upper Cottonwood Lakes. 3398 Comment
  RSA44320  Carex congdonii J. T. Howell 1947-8-6 23832 Inyo Summit Lake; (moraine above), Big Pine Lakes. 3415 Comment
  CAS-BOT-BC34466  Carex deflexa var. boottii John Thomas Howell 1948-7-23 24945 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 3048 Comment
  CAS-BOT-BC34852  Carex deflexa var. boottii John Thomas Howell 1958-8-9 34254 Madera Sierra Nevada. Miller Meadow. 2103 Comment
  UCD140244  Carex deflexa var. boottii John Thomas Howell 1961-6-20 36553 Shasta Lassen Volcanic National Park, Dersch Meadows. 1981 Comment
  CAS-BOT-BC20481  Carex densa John Thomas Howell 1930-6-8 5235 Sonoma 3 miles east of Valley Ford. Comment
  CAS-BOT-BC34965  Carex densa John Thomas Howell; R. C. Barneby 1954-5-10 29350 Fresno Sierra Nevada. 3 miles above Tollhouse. 1082 Comment
  CAS-BOT-BC35020  Carex densa John Thomas Howell 1944-4-23 19402 Marin Hills SE of Kentfield. Comment
  CAS-BOT-BC35028  Carex densa John Thomas Howell 1946-6-13 22055 Marin Esters School north of Dillon Beach. Comment
  UC1026410  Carex densa John Thomas Howell 1953-5-22 28974 Stanislaus Knights Ferry Sierra Nevada 60 Comment
  CAS-BOT-BC34958  Carex densa John Thomas Howell 1954-5-16 29614 El Dorado Sierra Nevada. Shingle Springs. 426 Comment
  CAS-BOT-BC19894  Carex echinata subsp. phyllomanica John Thomas Howell 1946-6-9 22005 Marin Abbotts Lagoon. Comment
  CAS-BOT-BC19915  Carex epapillosa John Thomas Howell 1947-8-11 23991 Inyo Baker Lakes. Thunder and Lightning Lake. 3566 Comment
  CAS-BOT-BC20116  Carex feta John Thomas Howell 1962-6-17 37659 Plumas Sierra Nevada. Butterfly Valley. 1036 Comment
  CAS-BOT-BC20219  Carex filifolia var. erostrata John Thomas Howell 1946-7-24 22699 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC20233  Carex filifolia var. erostrata John Thomas Howell 1941-7-24 16427 Madera Near Garnet Lake. 2956 Comment
  CAS-BOT-BC20270  Carex filifolia var. erostrata John Thomas Howell 1944-8-10 20224 Mono North slope of Mount Dana. Comment
  CAS-BOT-BC20278  Carex filifolia var. erostrata John Thomas Howell 1940-8-1 15807 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC20816  Carex fracta John Thomas Howell 1950-7-17 26996 Tulare Trail from Bakeoven to Templeton Meadows. 2682 Comment
  CAS-BOT-BC21303  Carex fracta John Thomas Howell; Gordon H. True 1973-7-31 50047 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  CAS-BOT-BC20429  Carex globosa John Thomas Howell 1939-6-16 14757 Santa Cruz Ben Lomond sand-hills. Comment
  CAS-BOT-BC20852  Carex globosa John Thomas Howell 1953-3-15 28923 Contra Costa Rock City, Mt. Diablo. Comment
  UCR74656  Carex globosa J. T. Howell 1944-4-2 19368 A Marin SE of Laurel Dell, Mt. Tamalpais Comment
  SEINET7559869 Image available Carex globosa John Thomas Howell 1944-4-2 19368 A Marin Southeast of Laurel Del, Mt Tamalpais. Comment
  CAS-BOT-BC28385  Carex gracilior John Thomas Howell 1943-4-11 17898 Marin Black Canyon, San Rafael Hills. Comment
  CAS-BOT-BC146562  Carex gynodynama John Thomas Howell 1945-6-24 21240 Marin Willow Meadow, Mt. Tamalpais Comment
  RSA88347  Carex harfordii J. T. Howell 1953-5-7 28952 Monterey Huckleberry Hill, Monterey Comment
  CAS-BOT-BC22128  Carex harfordii John Thomas Howell 1937-6-13 13048 Marin Head of Drakes Bay, Point Reyes. Comment
  UC905017  Carex harfordii John Thomas Howell 1949-5-25 25335 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC22233  Carex haydeniana John Thomas Howell 1949-8-5 26048 Inyo Army Pass. 3657 Comment
  CAS-BOT-BC22219  Carex helleri John Thomas Howell 1946-7-26 22768 Inyo Mono Mesa. 3657 Comment
  RSA44308  Carex helleri J. T. Howell 1947-8-5 23785 Inyo Fifth Lake, Big Pine Lakes. 3354 Comment
  CAS-BOT-BC22070  Carex heteroneura John Thomas Howell 1944-8-18 20698 Mariposa Porcupine Flat. Comment
  CAS-BOT-BC28082  Carex hoodii John Thomas Howell 1937-7-25 13484 Siskiyou Caribou Basin, Salmon-Trinity Alps. 2286 Comment
  CAS-BOT-BC28090  Carex hoodii John Thomas Howell 1942-7-26 17255 Tulare Mineral King Comment
  CAS-BOT-BC28142  Carex hoodii John Thomas Howell 1946-7-14 22321 Inyo Mosquito Flat, Rock Creek Lake Basin. 3139 Comment
  CAS-BOT-BC17190  Carex illota John Thomas Howell 1946-7-23 22680 Fresno Fourth Recess 3048 Comment
  CAS-BOT-BC28057  Carex illota John Thomas Howell 1944-8-7 20096 Tuolumne Tuolumne Meadows. Comment
  SEINET12879854 Image available Carex illota J. T. Howell 1944-1 20042 Unknown Comment
  CAS-BOT-BC7659  Carex integra John Thomas Howell 1939-8-3 15002 Siskiyou Spirit Lake, Marble Mountains. 1828 Comment
  RSA52239  Carex integra J. T. Howell 1949-8-6 26088 Tulare Soldier Lake. 3354 Comment
  SD130385  Carex jonesii John Thomas Howell 1970-9-23 47338 Kern Sierra Nevada; Greenhorn Mountains; near Tiger Flat; east side of Sunday Peak. 1981 Comment
  CAS-BOT-BC31154  Carex lemmonii John Thomas Howell 1960-7-18 35513 Plumas Wet meadow, Drakesbad. 1828 Comment
  UC904945  Carex lemmonii John Thomas Howell 1947-7-23 23563 San Bernardino Dollar Lake Trail San Bernardino Mountains 2773 Comment
  CAS-BOT-BC28541  Carex lenticularis var. impressa John Thomas Howell 1942-8-1 17561 Tulare Moraine Lake. Comment
  CAS-BOT-BC28464  Carex lenticularis var. lipocarpa John Thomas Howell 1960-8-22 36394 Shasta Hat Lake 1950 Comment
  CAS-BOT-BC28510  Carex lenticularis var. lipocarpa John Thomas Howell 1951-6-28 27733 Plumas Eureka Lake 1889 Comment
  POM254202  Carex lenticularis var. lipocarpa J. T. Howell 1939-8-3 14760 Siskiyou Spirit Lake, Marble Mountains. 1829 Comment
  CAS-BOT-BC31798  Carex mariposana John Thomas Howell 1949-8-7 26142 Tulare Rock Creek to Guyot Creek. 3017 Comment
  SD130388  Carex mariposana John Thomas Howell 1972-7-10 38444 Kern Sierra Nevada; greenhorn Mountains; 1.5 miles south of Summit. 1951 Comment
  CAS-BOT-BC146632  Carex mendocinensis John Thomas Howell 1940-5-26 15535 Marin Little Carson Falls Comment
  CAS-BOT-BC31893  Carex microptera John Thomas Howell 1943-7-14 18307 Nevada West side of Donner Pass near Norden 2133 Comment
  UCD140645  Carex microptera John Thomas Howell 1939-8-5 15082 Siskiyou Spirit Lake, Marble Mountains. 1828 Comment
  CAS-BOT-BC32155  Carex multicaulis John Thomas Howell 1955-6-14 30469 Butte De Sabla Comment
  SD130934  Carex multicaulis John Thomas Howell 1972-4-24 48698 Mariposa Sierra Nevada Mountains; west of Yosemite Valley near Cascade Falls; in yellow pine forest. 1036 Comment
  UCD140651  Carex multicaulis John Thomas Howell 1937-7-27 13586 Trinity Coffee Creek Canyon near Union Creek. Comment
  CAS-BOT-BC119997  Carex multicostata John Thomas Howell 1951-7-17 27843 Tulare White Chief Trail. 2834 Comment
  CAS-BOT-BC21317  Carex multicostata John Thomas Howell 1938-8-9 14457 Madera Devil's Postpile. Comment
  CAS-BOT-BC119985  Carex multicostata John Thomas Howell; Gordon H. True 1970-6-26 46892 Tulare Cherry Hill Road, just S of Big Meadow. Kern Plateau 2529 Comment
  CAS-BOT-BC119954  Carex nebrascensis John Thomas Howell; Gordon H. True 1966-7-11 41613 Tulare Poison Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC119959  Carex nebrascensis John Thomas Howell 1949-7-27 25835 Tulare Whitney Meadows. 2956 Comment
  CAS-BOT-BC119950  Carex nebrascensis John Thomas Howell; Gordon H. True 1971-7-14 48460 Tulare W end of Deadwood Meadow, ca 1.5 mi NW of Sirretta Peak. 2804 Comment
  SEINET7568733 Image available Carex nebrascensis John Thomas Howell 1934-6-15 12190 Modoc Alturas. Comment
  CAS-BOT-BC119621  Carex nigricans John Thomas Howell 1949-7-20 25554 Tulare Sky Blue Lake 3505 Comment
  SEINET7568886 Image available Carex nigricans John Thomas Howell 1937-7-25 13487 Siskiyou Caribou Basin, Salmon-Trinity Alps. 1981 Comment
  CAS-BOT-BC119575  Carex nudata John Thomas Howell 1950-5-20 26319 Tulare Along bank of Kaweah River at Three Rivers. 304 Comment
  CAS-BOT-BC119391  Carex obnupta John Thomas Howell 1946-5-4 21714 Marin East of Aurora School at Sonoma Co. line. Comment
  UC583126  Carex obnupta John Thomas Howell and J. W. Stacey 1936-6-7 12648 Marin on road to Point Reyes; Ledum Swamp Comment
  CAS-BOT-BC9287  Carex orestera John Thomas Howell 1947-8-7 23873 Inyo West of Sixth Lake, Big Pine Lakes 3413 Comment
  UC710482  Carex pachystachya John Thomas Howell 1943-8-9 19236 Glenn Plaskett Meadows 1828 Comment
  RSA88344  Carex pansa J. T. Howell 1953-5-9 28964 Monterey Dunes just above beach, Carmel Comment
  RSA98599  Carex pansa J. T. Howell 1953-5-9 28964 Monterey Dunes just above beach, Carmel Comment
  CAS-BOT-BC118973  Carex pellita John Thomas Howell 1947-7-18 23429 Los Angeles Big Pines, San Gabriel Mts. 2103 Comment
  SD130392  Carex petasata John Thomas Howell 1963-7-10 39731 Alpine Sierra Nevada; Sagebrush flat; 0.5 mile west of Monitor Pass. 1219 Comment
  CAS-BOT-BC118850  Carex praeceptorum John Thomas Howell 1946-7-15 22384 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin. Comment
  UC750554  Carex praeceptorum John Thomas Howell 1946-7-15 22384 Inyo between Mosquito Flat and Ruby Lake; Rock Creek Lake Basin Comment
  CAS-BOT-BC118363  Carex praegracilis John Thomas Howell 1928-6-20 4057 Inyo Jail Canyon near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC118583  Carex praegracilis John Thomas Howell; Gordon H. True 1967-5-30 42440 Tulare Slopes W of Lamont Meadow. Kern Plateau. 1706 Comment
  CAS-BOT-BC117995  Carex rossii John Thomas Howell 1958-7-24 33881 Fresno Simpson Meadow, Middle Fork of the Kings River. 1828 Comment
  CAS-BOT-BC118012  Carex rossii John Thomas Howell 1958-5-24 33257 Inyo Whitney Portal 2529 Comment
  SEINET10709358  Carex rossii John Thomas Howell 1944-7-14 Howell 19782 Glenn Plaskett Meadows. Comment
  CAS-BOT-BC117869  Carex sartwelliana John Thomas Howell 1958-7-25 33906 Fresno Simpson Meadow, Middle fork of the Kings River. 1828 Comment
  CAS-BOT-BC117898  Carex scabriuscula John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54148 Plumas 2.65 miles W of Round Valley Reservoir dam. 1569 Comment
  CAS-BOT-BC117907  Carex scabriuscula John Thomas Howell 1937-7-29 13673 Siskiyou North side of Scott Mt. Comment
  CAS-BOT-BC118217  Carex scoparia John Thomas Howell 1976-7-15 51848 Plumas Snake Lake, ca 4 mi NW of Quincy. 1219 Comment
  CAS-BOT-BC28282  Carex scopulorum var. bracteosa John Thomas Howell 1944-8-13 14578 Mariposa Snow Flat. Comment
  CAS-BOT-BC117494  Carex senta John Thomas Howell; Gordon H. True 1968-5-12 44239 Tulare Wet ground along Brush Creek, Kern Plateau. 1402 Comment
  CAS-BOT-BC117561  Carex serratodens John Thomas Howell 1945-6-19 21019 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  RSA52091  Carex simulata J. T. Howell 1946-9-1 22980 El Dorado Echo Summit. 2256 Comment
  CAS-BOT-BC117782  Carex specifica John Thomas Howell 1941-7-31 16559 Madera Agnew Pass Trail. Comment
  RSA52236  Carex specifica J. T. Howell 1949-8-7 26139 Tulare Rock Creek to Guyot Creek. 3018 Comment
  CAS-BOT-BC117146  Carex spectabilis John Thomas Howell 1941-8-5 16769 Madera Near Garnet Lake 2956 Comment
  RSA22207  Carex spectabilis J. T. Howell 1938-8-12 14553 Tuolumne Tuolumne Meadows Comment
  SEINET10749653  Carex spectabilis John Thomas Howell 1941-8-2 Howell 16674 Madera Near Garnet Lake, 2957 Comment
  SEINET12882926 Image available Carex spectabilis J. T. Howell 1944-1 20395 Unknown Comment
  CAS-BOT-BC116993  Carex straminiformis John Thomas Howell 1943-7-21 18667 Placer Mt. Lincoln Comment
  CAS-BOT-BC117065  Carex straminiformis John Thomas Howell 1946-7-16 22464 Inyo West side of Morgan Pass. Rock Creek Lake Basin. Comment
  UCD140894  Carex straminiformis John Thomas Howell 1960-8-19 36151 Tehama Brokeoff Mountain Trail. Lassen Volcanic National Park. 2682 Comment
  RSA51942  Carex subbracteata J. T. Howell 1949-5-25 25336 Marin Point Reyes Peninsula. Comment
  CAS-BOT-BC116815  Carex subbracteata var. subbracteata John Thomas Howell 1938-5-1 13776 San Mateo San Bruno Hills Comment
  CAS-BOT-BC116861  Carex subbracteata var. subbracteata John Thomas Howell 1956-6-10 31540 San Francisco North slope of Bay View Hills. Comment
  CAS-BOT-BC114998  Carex subfusca John Thomas Howell 1960-7-18 35565 Plumas Meadow, Drakesbad. 1828 Comment
  CAS-BOT-BC115772  Carex subfusca John Thomas Howell; Gordon H. True 1970-6-26 46890 Tulare Wet place in coniferous forest, Cherry Hill Road just S of Big Meadow. 2529 Comment
  SEINET7577172 Image available Carex subfusca John Thomas Howell, T. C. Fuller, G. D. Barbe 1980-7-16 53858 Tulare Sierra Nevada, Paloma Meadows, Kern Plateau. 2591 Comment
  CAS-BOT-BC9355  Carex subnigricans John Thomas Howell 1940-8-9 16086 Fresno Bullfrog Lake Comment
  CAS-BOT-BC9379  Carex subnigricans John Thomas Howell 1951-7-21 28084 Tulare Mineral King and Vicinity. White Chief Region 3048 Comment
  CAS-BOT-BC115699  Carex tahoensis John Thomas Howell 1946-7-16 22435 Inyo Box Lake, Rock Creek Lake Basin. 3200 Comment
  UCR87998  Carex tompkinsii J. T. Howell 1972-4-25 48719 Mariposa Sierra Nevada Mountains, Merced River Canyon, 1 mi from Arch Rock on the road to Cascade Falls. 915 Comment
  SEINET7578148 Image available Carex tompkinsii John Thomas Howell 1972-4-25 48719 Mariposa In Merced River Canyon, 1 mile from Arch Rock on road to Cascade Falls. 914 Comment
  CAS-BOT-BC115587  Carex tumulicola John Thomas Howell 1944-4-13 19370 Marin Big Rock Ridge W of Hamilton Field. Comment
  CAS-BOT-BC115367  Carex utriculata John Thomas Howell 1941-8-6 16794 Madera Shadow Creek below Lake Ediza Comment
  CAS-BOT-BC115410  Carex utriculata John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54182 Plumas Long Valley at road to Maxwell Mine. 1633 Comment
  CAS-BOT-BC115260  Carex vernacula John Thomas Howell 1938-8-11 14521 Tuolumne Mt. Dana 3200 Comment
  CAS-BOT-BC115269  Carex vernacula John Thomas Howell 1942-8-2 17584 Tulare Little Five Lakes Basin. Comment
  UC904988  Carex vernacula John Thomas Howell 1949-7-25 25728 Tulare Siberian Pass Creek Sierra Nevada Comment
  CAS-BOT-BC115155  Carex vesicaria John Thomas Howell 1960-7-19 35626 Plumas Meadow, Drakesbad. 1828 Comment
  SEINET10785808  Carex xerophila John Thomas Howell, Gordon H. True 1969-4-9 Howell 45490 Butte Magalia. 701 Comment
  SEINET4410122 Image available Carpenteria californica J. T. Howell 1954-1 11429 Unknown Comment
  CAS-BOT-BC281931  Carthamus tinctorius John Thomas Howell 1954-4-26 29195 Solano Along road just S of Winters Comment
  JEPS58954  Castilleja John Thomas Howell 1947-6-18 23282 Marin n of Dillons Beach Comment
  RSA102193  Castilleja ambigua subsp. ambigua J. T. Howell, G. Thomas Robbins 1945-5-9 1899 Marin 0.5 mile north of Hamilton Field Air Base. Ca. sea level. 0 Comment
  CAS-BOT-BC249383  Castilleja applegatei John Thomas Howell; Gordon H. True 1967-8-9 43659 Tulare About 4 miles north of Blackrock Guard Station, on Monache Trail. Kern Plateau 2682 Comment
  CAS-BOT-BC249487  Castilleja applegatei subsp. pallida John Thomas Howell 1941-7-31 16576 Madera Agnew Pass Trail Comment
  CAS-BOT-BC249495  Castilleja applegatei subsp. pallida John Thomas Howell 1938-8-10 14490 Mono Minaret Summit Comment
  CAS-BOT-BC249563  Castilleja applegatei subsp. pallida John Thomas Howell 1938-8-11 14517 Tuolumne Mt. Dana 3200 Comment
  CAS-BOT-BC241178  Castilleja applegatei subsp. pinetorum John Thomas Howell 1936-8-26 12835 Trinity Trinity River Canyon near Eagle Creek Comment
  CAS-BOT-BC241183  Castilleja applegatei subsp. pinetorum John Thomas Howell 1940-8-4 15971 Tulare Ouzel Basin 3048 Comment
  CAS-BOT-BC241202  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True 1970-6-24 46700 Tulare North Manter Creek, Big Meadow to Manter Meadow. Kern Plateau 2438 Comment
  RSA728  Castilleja cinerea J. T. Howell 1927-7-10 356 San Bernardino Big Bear Lake. 2043 Comment
  RSA705  Castilleja foliolosa J. T. Howell 1928-2-25 848 Orange Nolina Canyon, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC243857  Castilleja latifolia John Thomas Howell 1934-3-3 11740 Sonoma Near Fort Ross Comment
  CAS-BOT-BC32617  Castilleja latifolia subsp. pinnatifida John Thomas Howell 1933-5-28 11364 Alameda Strawberry Canyon, Berkeley HIlls Comment
  GH56153  Castilleja latifolia subsp. pinnatifida J. T. Howell 1933-5-28 11364 Unknown Berkeley, Strawberry Canyon, Berkeley Hills Comment
  JEPS9091  Castilleja nana John Thomas Howell 1951-7-21 28073 Tulare vicinity Mineral King (White Chief Region); , White Chief Region 2895 Comment
  RSA78620  Castilleja nana J. T. Howell 1944-8-8 20159 Mariposa High gap south of Elizabeth Lake. Comment
  CAS-BOT-BC240995  Castilleja pilosa John Thomas Howell 1949-8-12 26238 Inyo Cottonwood Lakes 3383 Comment
  CAS-BOT-BC241087  Castilleja schizotricha John Thomas Howell 1939-8-4 15043 Siskiyou Marble Rim, Marble Mts. 1889 Comment
  JEPS58952  Castilleja subinclusa subsp. franciscana John Thomas Howell 1946-5-19 21914 Marin Meadow Club Fairfax Hills (Fairfax Hills) Comment
  JEPS29553  Castilleja tenuis John Thomas Howell 1960-7-18 35517 Plumas Drakesbad; Lassen Volcanic National Park 1676 Comment
  CAS-BOT-BC39636  Caulanthus John Thomas Howell 1938-8-7 14342 Mono Near Little Round Valley. 2133 Comment
  CAS-BOT-BC39650  Caulanthus John Thomas Howell; Gordon H. True 1967-7-5 43193 Tulare Sierra Nevada. Kern Plateau. 2.8 miles north of South Fork Kern River bridge on road to Troy Meadow. 2194 Comment
  CAS-BOT-BC38190  Caulanthus anceps John Thomas Howell 1931-3-23 6000 Monterey Poncho Rico Canyon, 6.6 miles east of Salinas Valley. Comment
  CAS-BOT-BC38451  Caulanthus coulteri John Thomas Howell 1976-5-18 51754 Kern Sierra Nevada. Greenhorn Mountains. 2.6 miles from Wofford. Along old road from Alta Sierra to Wofford Heights. Comment
  CAS-BOT-BC41090  Caulanthus hallii John Thomas Howell 1930-5-10 4811 San Diego 10 miles north of Warner's Hot Springs. Comment
  CAS-BOT-BC40230  Caulanthus lasiophyllus John Thomas Howell 1966-5-25 41543 Marin Gully just north of garden area. John Thomas Howell Botanical Garden, Tiburon. Comment
  CAS-BOT-BC40238  Caulanthus lasiophyllus John Thomas Howell 1956-3-25 31212 Monterey Santa Lucia Mountains. 7 miles from Greefield on Arroyo Seco road. Comment
  CAS-BOT-BC40475  Caulanthus lasiophyllus John Thomas Howell 1933-5-21 11299 Solano Blue Rock Springs. Comment
  SD72045  Caulanthus major John Thomas Howell 1964-8-10 40944 Alpine Rocky knoll ca. 0.5 mile southwest of Monitor Pass. 2515 Comment
  CAS-BOT-BC48513  Ceanothus confusus John Thomas Howell 1933-4-2 10946 Sonoma Rincon Ridge near Santa Rosa Comment
  CAS-BOT-BC48708  Ceanothus cordulatus John Thomas Howell 1945-9-30 21545 El Dorado Near Echo Summit Comment
  CAS-BOT-BC47863  Ceanothus cordulatus John Thomas Howell 1960-7-20 35741 Plumas Lassen Volcanic Nat'l Park, Boiling Springs Lake 1798 Comment
  RSA1511  Ceanothus crassifolius J. T. Howell 1929-2-13 1227 Riverside 2 miles so. of Alberhill. Comment
Read comments
Nov 9 2011
  A349131  Ceanothus cuneatus J. T. Howell 1924-5-10 304 Unknown Wawona Valley Comment
  CAS-BOT-BC48402  Ceanothus cuneatus var. cuneatus John Thomas Howell 1939-6-16 14751 Santa Clara Skyline Boulevard near Saratoga Gap Comment
  CAS-BOT-BC48440  Ceanothus cuneatus var. ramulosus John Thomas Howell 1942-3-8 16934 Marin Between Fairfax and Carson Ridge above Cascade Canyon Comment
  CAS-BOT-BC49102  Ceanothus cuneatus var. ramulosus John Thomas Howell 1954-3-18 29132 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC49148  Ceanothus cuneatus var. ramulosus John Thomas Howell 1930-12-28 5718 Marin Slope of Mt. Tamalpais above Mill Valley Comment
  UC1177453  Ceanothus foliosus John Thomas Howell 1946-5-25 21942 Marin hills w of Corte Madera Comment
  CAS-BOT-BC64417  Ceanothus foliosus subsp. vineatus John Thomas Howell 1931-3-14 5780 Sonoma Vine Hill District, 19 mi. w. of Santa Rosa. Comment
  CAS-BOT-BC50919  Ceanothus foliosus var. foliosus John Thomas Howell; Alice Eastwood 1939-6-11 7430 Napa Hills west of Calistoga Comment
  CAS-BOT-BC50732  Ceanothus integerrimus John Thomas Howell 1973-7-9 49718 Plumas Sierra Nevada - Round Valley 1371 Comment
  RSA518960  Ceanothus integerrimus J. T. Howell 1975-6-15 51116 Butte Skyway and Montana Drive, Paradise. 610 Comment
  CAS-BOT-BC51199  Ceanothus leucodermis John Thomas Howell 1965-4-26 41200 Madera 1.5 miles North of Oakhurst 762 Comment
  SEINET8126933 Image available Ceanothus masonii J. T. Howell, A. Eastwood 1937-1 3838 Unknown Comment
  LA44928  Ceanothus oliganthus var. sorediatus John Thomas Howell; 1930-4-17 4716 Alameda Strawberry Canyon, Berkeley Hills Comment
  CAS-BOT-BC126824  Ceanothus pauciflorus John Thomas Howell; Gordon H. True 1967-5-29 42357 Tulare Midway between Chimney and Lamont Meadows, Kern Plateau 1889 Comment
  CAS-BOT-BC52058  Ceanothus prostratus John Thomas Howell 1975-7-22 51356 Plumas 2 miles Northwest of Spring Garden 1173 Comment
  CAS-BOT-BC53037  Ceanothus sonomensis John Thomas Howell 1935-5-5 12609 Sonoma West slope of Hood Peak Range near summit of Triniti P.O. Road Comment
  A425288  Ceanothus sorediatus J. T. Howell 1928-3-2 3369 Unknown Los Angeles, Canon bottom, Vermont Canon, Griffith Park Comment
  CAS-BOT-BC52438  Ceanothus velutinus var. velutinus John Thomas Howell 1924-8-13 637 Lassen Between Chester and Westwood Comment
  CAS-BOT-BC52726  Ceanothus vestitus John Thomas Howell; Gordon H. True 1966-7-12 41823 Kern Sierra Nevada - Kern Plateau - Rim of plateau just east of Fay Creek Canyon 2194 Comment
  CAS-BOT-BC63110  Ceanothus vestitus John Thomas Howell; Gordon H. True 1967-5-29 42404 Tulare Long Valley on road to Lamont Meadow. kern Plateau. 1645 Comment
  CAS-BOT-BC281963  Centaurea benedicta John Thomas Howell 1930-6-29 5330 San Joaquin At Nile Garden Comment
  RSA8524  Centaurea repens J. T. Howell 1933-7-2 11419 Monterey 6 miles N of King City Comment
  UC878341  Centaurium venustum John Thomas Howell 1938-5-29 13855 Madera Raymond Comment
  CAS-BOT-BC288541  Centromadia fitchii John Thomas Howell 1955-8-24 30904 Contra Costa Mt Diablo near Turtle Rock 259 Comment
  PGM636  Centromadia fitchii J. T. Howell 1963-8-7 Monterey Diablo Range, Highway 198 Mustang Grade W side, Between summit & San Lorenzo Cr Comment
  CAS-BOT-BC271544  Centromadia parryi subsp. parryi John Thomas Howell 1930-10-5 5530 Sonoma Dry field 5.8 miles SW of Sonoma on Black Point cutoff Comment
  CAS-BOT-BC279347  Centromadia pungens subsp. pungens John Thomas Howell 1965-5-9 41293 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC179741  Centrostegia thurberi John Thomas Howell; Gordon H. True 1967-7-3 42801 Tulare about 1.5 miles from Lamont Meadow on road to Long Valley. Sierra Nevada. Kern Plateau 1737 Comment
  CAS-BOT-BC388309  Cerastium glomeratum John Thomas Howell 1946-4-13 s.n. Marin Near Rock Spring, Mt. Tamalpais Comment
  CAS-BOT-BC388312  Cerastium glomeratum John Thomas Howell 1946-4-14 21629 Marin Near Dillons Beach Comment
  CAS-BOT-BC135507  Cercocarpus betuloides var. betuloides John Thomas Howell 1945-6-20 21114 Lake Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC135538  Cercocarpus betuloides var. betuloides John Thomas Howell 1962-7-8 38195 Kern Black Mt. burn, Greenhorn Mountains - Sierra Nevada 1066 Comment
  UCD113092  Cercocarpus ledifolius John Thomas Howell 1964-5-11 40702 Siskiyou NE of Callahan on road to Gazelle. Comment
  CAS-BOT-BC143852  Cercocarpus ledifolius var. ledifolius John Thomas Howell 1943-7-20 18598 Nevada Castle Peak Comment
  CAS-BOT-BC279495  Chaenactis alpigena John Thomas Howell 1942-8-7 17789 Tulare Lost Canyon 3048 Comment
  RSA810  Chaenactis artemisiifolia J. T. Howell 1927-6-5 36 Orange just to E of Rancho Santa Ana 152 Comment
  CAS-BOT-BC276725  Chaenactis douglasii var. douglasii John Thomas Howell 1960-8-20 36285 Plumas Kelly Camp, near Drakesbad 1615 Comment
  CAS-BOT-BC276788  Chaenactis douglasii var. douglasii John Thomas Howell 1950-7-19 27115 Tulare Pass N of Hessian Meadows 2743 Comment
  CAS-BOT-BC276737  Chaenactis douglasii var. douglasii John Thomas Howell 1960-8-22 36382 Shasta Anklin Meadows 1889 Comment
  CAS-BOT-BC277466  Chaenactis glabriuscula var. glabriuscula John Thomas Howell 1931-6-4 6639 San Diego 2 miles n. of Fallbrook Comment
  CAS-BOT-BC279748  Chaenactis xantiana John Thomas Howell 1958-5-22 33115 Tulare Kern River Canyon 6 miles south of Roads End P.O. 944 Comment
  POM204107  Chamaebatiaria millefolium J. T. Howell 1934-7-4 12399 Siskiyou SE corner of Siskiyou County Comment
  CDA4799  Chamaesyce prostrata J. T. Howell 1974-9-12 50869 Alameda Northwest corner of University of California campus, Berkeley. 0 Comment
  CAS-BOT-BC166083  Chamerion angustifolium subsp. circumvagum John Thomas Howell 1977-8-11 52679 Plumas Canyon of Little Last Chance Creek between Chilcoot and Frenchmans Reservoir 1676 Comment
  CAS-BOT-BC66352  Cheilanthes covillei John Thomas Howell 1955-3-6 30146 Contra Costa on south side of South Peak, Mt. Diablo Comment
  CAS-BOT-BC68172  Cheilanthes intertexta John Thomas Howell 1943-3-7 17882 Marin Hills northeast of San Rafael Comment
  RSA201411  Chenopodium album J. T. Howell 1956-10-28 31932 San Francisco Mountain Lake, Presidio; San Francisco. Comment
  CAS-BOT-BC460946  Chenopodium atrovirens John Thomas Howell 1943-8-5 19087 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC471345  Chenopodium hians John Thomas Howell; Gordon H. True 1967-8-8 43571 Tulare Sierra Nevada, Kern Plateau. SE of Long Valley on road to Lamont Meadow Comment
  UCD98283  Chenopodium missouriense John Thomas Howell 1952-10-26 28875 San Bernardino San Bernardino. Comment
  CAS-BOT-BC426312  Chenopodium pratericola John Thomas Howell 1950-7-13 26792 Tulare Sierra Nevada, South Fork of Kern River: Bakeoven Meadows 2468 Comment
  RSA743  Chilopsis linearis subsp. arcuata J. T. Howell 1927-7-9 310 San Bernardino Near Box Spring, Mojave Desert 1159 Comment
  CAS-BOT-BC451429  Chimaphila menziesii John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1967-7-10 2153 Plumas Butterfly Botanical Area and vicinity: Beargrass Glade 1127 Comment
  UC876100  Chimaphila umbellata John Thomas Howell 1939-8-5 15068 Siskiyou Marble Mts., Spirit Lake Comment
  CAS-BOT-BC236911  Chloropyron maritimum subsp. palustre John Thomas Howell 1939-7-2 s.n. Marin Almonte Marshes Comment
  UCD99698  Chorizanthe brevicornu var. spathulata John Thomas Howell 1958-5-28 33550 Inyo Sierra Nevada, Bishop Creek. 1950 Comment
  SEINET4182624  Chorizanthe brevicornu var. spathulata J. T. Howell 1958-5-28 33591 Inyo Bishop Creek 1524 Comment
  CAS-BOT-BC32868  Chorizanthe howellii John Thomas Howell 1929-5-26 4233 Mendocino Fort Bragg, Mendocino coastal plain 15 Comment
  CAS-BOT-BC244703  Chorizanthe spinosa John Thomas Howell 1957-6-24 32735 Kern Desert slope, 2.5 miles ssw. of Red Rock Canyon 640 Comment
  CAS-BOT-BC244800  Chorizanthe staticoides John Thomas Howell 1931-5-29 6585 Los Angeles Santa Susana Pass. On a burn in chaparral Comment
  CAS-BOT-BC248038  Chorizanthe watsonii John Thomas Howell 1930-5-13 4976 Kern Red Rock Canyon Comment
  CAS-BOT-BC36302  Chrysolepis sempervirens John Thomas Howell 1946-7-20 s.n. Fresno Mono Rock 3352 Comment
  CAS-BOT-BC36334  Chrysolepis sempervirens John Thomas Howell 1925-9-22 s.n. El Dorado Emerald Bay, Lake Tahoe Comment
  RSA201324  Chrysolepis sempervirens J. T. Howell 1960-7-20 35783 Plumas Between boiling Springs Lake and Terminal Geyser. 1860 Comment
  RSA201326  Chrysothamnus nauseosus subsp. albicaulis J. T. Howell 1960-8-20 36283 Plumas Kelly Camp, near Drakesbad. 1616 Comment
  CAS-BOT-BC100815  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1959-9-25 35022 Plumas Summit of Beckwourth Pass 1588 Comment
  CAS-BOT-BC100877  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell; Gordon H. True 1967-8-9 43663 A Tulare ca. 4 miles north of Blackrock Guard Station on Monache Jeep Trail, Kern Plateau 2682 Comment
  CAS-BOT-BC105942  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1962-9-23 38836 Kern Along highway (perhaps adeventive), south side of Black mt. - Greenhortn Mountains 1066 Comment
  JEPS75239  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1962-9-23 38836 Kern s side of Black Mt.; Sierra Nevada, Greenhorn Mountains, Black Mt. 1066 Comment
  CAS-BOT-BC285274  Cirsium andersonii John Thomas Howell 1977-8-3 52536 Alpine Just north of Ebbetts Pass 2682 Comment
  CAS-BOT-BC105804  Cirsium andrewsii John Thomas Howell 1957-10-5 32985 San Francisco Fort Point, Presidio, San Francisco Comment
  SEINET5507050 Image available Cirsium andrewsii John Thomas Howell 1933-7-9 11424 San Francisco Lake Merced, San Francisco Comment
  CAS-BOT-BC284417  Cirsium arvense John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-7-10 2188 Plumas Mouth of Butterfly Creek, Butterfly Botanical Area and vicinity 883 Comment
  POM225838  Cirsium arvense J. T. Howell 1931-6-17 6724 Humboldt Redwood Highway, 1.5 miles north of Orick Comment
  CAS-BOT-BC105783  Cirsium crassicaule John Thomas Howell 1933-7-20 11447 San Joaquin 2 miles nw of Lathrop Bridge on San Joaquin River Comment
  CAS-BOT-BC278007  Cirsium cymosum John Thomas Howell 1934-6-10 11908 Lassen Madeline Plains near Termo Comment
  CAS-BOT-BC279957  Cirsium douglasii var. breweri John Thomas Howell 1960-7-24 35977 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC100918  Cirsium fontinale var. campylon John Thomas Howell 1957-5-19 32369 Stanislaus Del Puerto Canyon 518 Comment
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Jul 26 2020
  CAS-BOT-BC100945  Cirsium fontinale var. fontinale John Thomas Howell 1939-6-16 14743 San Mateo Crystal Springs Lake Comment
  CAS-BOT-BC287981  Cirsium occidentale var. californicum John Thomas Howell 1942-7-24 17051 Tulare Canyon of East Fork of Kaweah River at Trauger's Spring Comment
  CAS-BOT-BC285516  Cirsium occidentale var. candidissimum John Thomas Howell 1934-7-11 12562 Lassen Eldridge, 10 miles se. of Fall River Mills Comment
  CAS-BOT-BC285647  Cirsium occidentale var. occidentale John Thomas Howell 1926-4-24 1944 San Francisco Lake Merced, San Francisco Comment
  CAS-BOT-BC280384  Cirsium occidentale var. venustum John Thomas Howell 1942-7-27 17311 Tulare Cliff Creek between Deer Creek and Pinto Lake Comment
  CAS-BOT-BC286592  Cirsium occidentale var. venustum John Thomas Howell 1933-8-17 11556 San Benito Near Hernandez Comment
  CAS-BOT-BC286405  Cirsium occidentale var. venustum John Thomas Howell 1957-6-25 32751 Kern Tehachapi Mts. Comment
  CAS-BOT-BC280449  Cirsium quercetorum John Thomas Howell 1938-6-30 13940 Alameda Berkeley Hills on ne. slope near head of Wildcat Canyon Comment
  POM261377  Cirsium quercetorum J. T. Howell 1939-6-18 14774 Marin Near Mud Lake Comment
  CAS-BOT-BC288695  Cirsium remotifolium John Thomas Howell 1941-6-21 16314 A Napa Hills SW of St Helena Comment
  CAS-BOT-BC288738  Cirsium remotifolium John Thomas Howell 1936-6-7 12631 Marin Whites Hill E of San Geronimo Comment
  CAS-BOT-BC286459  Cirsium scariosum John Thomas Howell 1952-10-24 28865 Riverside South end of Santa Ana Mts. Comment
  CAS-BOT-BC286497  Cirsium scariosum John Thomas Howell 1940-8-1 15814 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC292724  Cirsium scariosum John Thomas Howell 1944-8-16 20614 Tuolumne Mono Pass Comment
  CAS-BOT-BC438931  Cistanthe monandra John Thomas Howell; Gordon H. True 1967-5-29 42345 Tulare Midway between Chimney and Lamont Meadows. Kern Plateau. 1889 Comment
  CAS-BOT-BC439077  Cistanthe monosperma John Thomas Howell 1944-8-6 20006 Tuolumne Between Dog Lake and Tuolumne Meadows Comment
  CAS-BOT-BC169793  Cistanthe pygmaea John Thomas Howell 1942-7-31 17427 Tulare Fish Big Arroyo 3017 Comment
  CAS-BOT-BC228710  Cistanthe umbellata John Thomas Howell 1958-8-12 34311 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC228763  Cistanthe umbellata John Thomas Howell 1963-7-12 39843 El Dorado Meyers 1935 Comment
  CAS-BOT-BC228782  Cistanthe umbellata John Thomas Howell 1958-7-23 33814 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC229068  Cistanthe umbellata John Thomas Howell; Gordon H. True 1967-8-7 43405 Tulare About 3 miles northwest of Beach Meadow, Kern Plateau 2499 Comment
  CAS-BOT-BC229090  Cistanthe umbellata John Thomas Howell 1950-7-22 27235 Tulare Summit ridge, Olancha Peak 3698 Comment
  CAS-BOT-BC162649  Clarkia John Thomas Howell; Gordon H. True 1971-5-26 47625 Placer Northern limits of Lincoln 48 Comment
  CAS-BOT-BC172325  Clarkia bottae John Thomas Howell 1928-4-22 3756 Ventura Bank above lagoon at Pt. Mugu Comment
  CAS-BOT-BC164454  Clarkia dudleyana John Thomas Howell; Gordon H. True 1971-6-14 47681 Kern 3 miles east of Glennville on Greenhorn Mt. road 1219 Comment
  CAS-BOT-BC164485  Clarkia epilobioides John Thomas Howell 1931-4-10 6223 Santa Barbara Puerta Zuela, Santa Cruz Island Comment
  CAS-BOT-BC172452  Clarkia purpurea subsp. purpurea John Thomas Howell 1938-5-22 13796 Marin San Anselmo Canyon Comment
  RSA114321  Clarkia purpurea subsp. purpurea J. T. Howell 1947-5-21 23187 Marin Tiburon. Comment
  CAS-BOT-BC163652  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1962-6-16 37599 Butte Feather River West Branch sw. of Nelson Bar 304 Comment
  JEPS33714  Clarkia rhomboidea John Thomas Howell 1926-7-20 2081 Plumas near Prattville 1463 Comment
  RSA512847  Clarkia speciosa subsp. polyantha J. T. Howell, G. H. True 1971-7-12 48332 Kern West slope of Greenhorn Range, 3 miles east of Glenville. 1220 Comment
  RSA118046  Clarkia speciosa subsp. speciosa J. T. Howell 1955-7-8 30626 Monterey Santa Lucia Camp, Arroyo Seco River. 610 Comment
  CAS-BOT-BC165879  Clarkia xantiana John Thomas Howell; Gordon H. True 1970-6-23 46604 Tulare Kern River Canyon at Gold Ledge Creek 944 Comment
  CAS-BOT-BC439272  Claytonia exigua subsp. exigua John Thomas Howell 1933-4-23 11178 San Benito Near Hernandez Comment
  CAS-BOT-BC439188  Claytonia exigua subsp. exigua John Thomas Howell; Gordon H. True 1971-6-15 47735 Kern South end of Havilah Canyon 1310 Comment
  CAS-BOT-BC439226  Claytonia exigua subsp. exigua John Thomas Howell 1943-5-2 17937 Marin Carson Ridge Comment
  POM225662  Claytonia perfoliata J. T. Howell 1931-3-10 5755 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  CAS-BOT-BC440000  Claytonia perfoliata subsp. mexicana John Thomas Howell 1931-4-13 6319 Santa Barbara Santa Cruz Island near west end. Comment
  CAS-BOT-BC440084  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1958-7-26 33971 Fresno Tehipite Valley, Middle Fork of the Kings River 1280 Comment
  CAS-BOT-BC443592  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1946-4-13 21604 Marin Near Rock Spring, Mt. Tamalpais Comment
  CAS-BOT-BC439756  Claytonia rubra subsp. depressa John Thomas Howell; Gordon H. True 1965-7-14 2306 A Nevada Loney Meadow on Texas Creek, 1.5 miles south of Bowman Lake. 1828 Comment
  CAS-BOT-BC439760  Claytonia rubra subsp. depressa John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49179 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC443723  Claytonia rubra subsp. rubra John Thomas Howell 1925-5-29 1105 El Dorado Emerald Bay Camp, Lake Tahoe. 1889 Comment
  CAS-BOT-BC392078  Clematis John Thomas Howell 1954-5-17 29659 El Dorado 4 miles north of Placerville Comment
  CAS-BOT-BC91374  Clematis lasiantha John Thomas Howell 1945-6-21 21187 Lake Bartlett Mountain. Sawmill Flat to Ruppert Ridge. Comment
  CAS-BOT-BC91431  Clematis lasiantha John Thomas Howell 1963-5-5 39017 Monterey Mustang Grade, west of Priest Valley. 670 Comment
  CAS-BOT-BC500960  Clintonia uniflora John Thomas Howell 1939-8-3 15015 Siskiyou Spirit Lake 1828 Comment
  SDSU13799  Cneoridium dumosum Bill Howell, 1998-3-9 San Diego North side of Fortuna Mountain, Mission Trails Regional Park. 274 Comment
  CAS-BOT-BC143440  Coleogyne ramosissima John Thomas Howell 1958-5-25 33397 Inyo Whitney Portal Road 1889 Comment
  UCR17877  Collinsia parryi J. T. Howell 1928-5-6 s.n. Los Angeles San Gabriel Mtns, Big Santa Anita Canyon: East Fork Trail 854 Comment
  UCD101794  Comandra umbellata subsp. californica John Thomas Howell 1954-6-4 29915 Tuolumne Twain Harte. 1127 Comment
  UCD101796  Comandra umbellata subsp. californica John Thomas Howell 1958-7-30 34118 Fresno on trail to Tehipite Valley, Middle Fork of Kings River, west of Simpson Meadow. 1798 Comment
  UCD95631  Consolida ajacis John Thomas Howell 1950-5-20 26312 Tulare Visalia. Comment
  CAS-BOT-BC237963  Cordylanthus rigidus subsp. brevibracteatus John Thomas Howell 1962-7-11 38564 Kern Nw. slope of Black Mt., Greenhorn Mountains 2133 Comment
  CAS-BOT-BC238075  Cordylanthus rigidus subsp. brevibracteatus John Thomas Howell; Gordon H. True 1971-6-17 48024 Kern 0.5 mile east of Bodfish Gap 1219 Comment
  GH365863  Cordylanthus rigidus subsp. brevibracteatus J. T. Howell 1962-9-22 38768 Unknown 1.5 miles south of Summit. Greenhorn Mountains. 1950 Comment
  UCR88755  Cordylanthus rigidus subsp. brevibracteatus J. T. Howell 1962-9-22 38768 Kern Greenhorn Mtns., 1.5 mi south of Summit 1951 Comment
  RSA99632  Cordylanthus rigidus subsp. rigidus J. T. Howell 1954-11-3 30124 Monterey Santa Lucia Memorial Park, Arroyo Seco River. Comment
  CAS-BOT-BC287737  Coreopsis bigelovii John Thomas Howell; Gordon H. True 1971-6-15 47764 Kern Flying Dutchman Creek canyon on Havilah - Mt Breckenridge Rd 1188 Comment
  UC729611  Coreopsis californica var. californica J. T. Howell 1929-2-14 1232 Riverside 2 mi s Glen Ivy; Temescal Canyon Comment
  CAS-BOT-BC101373  Corethrogyne filaginifolia John Thomas Howell 1927-11-27 3266 San Diego 12 miles s. of Warner's Hot Springs 822 Comment
  CAS-BOT-BC101599  Corethrogyne filaginifolia John Thomas Howell 1952-10-28 28910 Tulare Generals Highway 3 miles from Grant Grove Comment
  CAS-BOT-BC101206  Corethrogyne filaginifolia John Thomas Howell 1972-10-12 49104 Monterey Julia Pfeiffer Burns State Park, Santa Lucia Mts. Comment
  CAS-BOT-BC209722  Cornus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54363 Plumas 0.75 miles northeast of Bucks Summit on road to Quincy 1600 Comment
  RSA41990  Cornus occidentalis J. T. Howell 1936-8-23 1586 Trinity Preacher Camp Ground. 4 mi. W. of Scott Ranch, Trinity Center. Comment
  CAS-BOT-BC210311  Cornus sericea John Thomas Howell 1961-6-21 36632 Plumas Greenville 1097 Comment
  CAS-BOT-BC212199  Cornus sericea John Thomas Howell; Gordon H. True 1969-9-29 46322 Kern Fay Creek southeast of True Meadow, Kern Plateau, Sierra Nevada 2072 Comment
  CAS-BOT-BC212208  Cornus sericea John Thomas Howell; Gordon H. True 1973-7-31 50043 Lassen On road from Janesville to Thompson Peak, Diamond Range, Sierra Nevada 1783 Comment
  CAS-BOT-BC172840  Corylus cornuta subsp. californica John Thomas Howell; Gordon H. True 1970-5-27 46534 El Dorado near headquarters, Blodgett Experimental Forest. Sierra Nevada 1280 Comment
  CAS-BOT-BC287280  Cotula australis John Thomas Howell 1958-5-17 33029 San Francisco E of Band Concourse, Golden Gate Park, San Francisco Comment
  CAS-BOT-BC291356  Cotula coronopifolia John Thomas Howell 1925-4-11 958 Napa Soscol Comment
  CAS-BOT-BC427602  Crassula aquatica John Thomas Howell 1926-11-7 2243 San Francisco Lake Merced, San Francisco. Comment
  CAS-BOT-BC290326  Crepis John Thomas Howell 1962-6-17 37724 Plumas Portola 1463 Comment
  CAS-BOT-BC290390  Crepis acuminata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49462 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC290453  Crepis acuminata John Thomas Howell 1951-6-28 27641 Plumas Johnsville 1584 Comment
  CAS-BOT-BC290481  Crepis acuminata John Thomas Howell 1969-8-28 46043 Tulare Mineral King 2377 Comment
  UC1177286  Crepis capillaris John Thomas Howell 1945-7-29 21338 Marin Bolinas Comment
  POM203850  Crepis occidentalis subsp. pumila J. T. Howell 1934-6-10 11872 Lassen Janesville Comment
  CAS-BOT-BC189379  Cryptantha circumscissa John Thomas Howell; Gordon H. True 1971-6-16 47899 Kern Along Kelso Creek, 15 miles S of Weldon on road to Kelso Valley 1219 Comment
  CAS-BOT-BC189434  Cryptantha circumscissa John Thomas Howell; Gordon H. True 1967-7-5 43140 Tulare 6 miles N of South Fork Kern River Bridge on road to Troy Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC189439  Cryptantha circumscissa John Thomas Howell; Gordon H. True 1969-10-1 46446 Tulare Taylor Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC218892  Cryptantha circumscissa subsp. rosulata John Thomas Howell 1949-7-27 25830 Tulare Whitney Meadows 2956 Comment
  RSA641  Cryptantha clevelandii J. T. Howell 1927-7-22 460 Orange North of Botany Garden, Rancho Santa Ana. 274 Comment
  UC1042564  Cryptantha flaccida John Thomas Howell 1952-6-14 28342 Siskiyou 9.5 mi from Ft. Jones (on road to Callahan) 853 Comment
  CAS-BOT-BC218788  Cryptantha glomeriflora John Thomas Howell 1949-7-25 25723 Tulare Siberian Pass Creek 3352 Comment
  CAS-BOT-BC218821  Cryptantha glomeriflora John Thomas Howell 1942-8-5 17752 Tulare Big Arroyo 3017 Comment
  CAS-BOT-BC218773  Cryptantha humilis John Thomas Howell 1943-7-20 18625 Nevada Castle Peak Comment
  CAS-BOT-BC215240  Cryptantha incana John Thomas Howell 1962-7-11 38545 Kern Black mountain, northwest slope. Greenhorn Mountains. 2133 Comment
  CAS-BOT-BC54150  Cryptantha intermedia John Thomas Howell 1934-7-1 12334 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC230709  Cryptantha rattanii John Thomas Howell 1963-4-25 38965 Stanislaus Arroyo del Puerto Comment
  SBBG28776  Cryptantha sparsiflora J. T. Howell 1955-5-21 30236 Monterey Hastings Reservation Comment
  CAS-BOT-BC54122  Cryptantha torreyana John Thomas Howell 1934-6-13 12044 Modoc Fandango Pass, Warner Mountains 1828 Comment
  CAS-BOT-BC70396  Cryptogramma acrostichoides John Thomas Howell 1925-7-2 1321 A El Dorado Trail to Desolation Valley above Glen Alpine, Lake Tahoe region Comment
  CAS-BOT-BC85460  Cupressus sargentii John Thomas Howell 1931-9-26 8092 Sonoma Serpentine outcrop 2 miles from Monte Rio on road to Camp Meeker Comment
  CAS-BOT-BC85478  Cupressus sargentii John Thomas Howell 1927-8-22 3040 Marin On rocky slope on Rock Spring Trail west of West Point, Mt. Tamalpais 548 Comment
  LA210096  Cuscuta californica John Thomas Howell; 1930-10-11 5552 San Joaquin 5 mi. S of Stockton Comment
  SBBG41367  Cuscuta californica J. T. Howell 1944-9-3 Marin head of Cascade Cyn, Mt Tamalpais Comment
  SEINET891445  Cuscuta occidentalis John Thomas Howell 1958-1 34169 Fresno Tent Meadow (lower), Copper Creek Canyon; plants of Sierra Nevada Comment
  CAS-BOT-BC287338  Cynara cardunculus John Thomas Howell 1956-11-14 31961 San Mateo Bayshore Highway just S of Main St, Redwood City Comment
  CAS-BOT-BC190333  Cynodon dactylon John Thomas Howell 1964-4-29 40688 Tuolumne Sierra Nevada. At Tuolumne River bridge, 2.5 mile east of Jacksonville. 198 Comment
  CDA1950  Cynosurus echinatus J. T. Howell 1943-7-28 18906 El Dorado Placerville Comment
  UCD141009  Cyperus difformis John Thomas Howell 1959-9-20 34637 Butte eastern outskirts of Oroville. 60 Comment
  RSA78  Cyperus esculentus J. T. Howell 1927-7-15 408 Orange Santa Ana River, Rancho Santa Ana [Botanic Garden] 152 Comment
  CAS-BOT-BC113854  Cyperus niger var. capitatus John Thomas Howell 1976-10-29 52302 El Dorado Along the course of Sweetwater Creek below the high-water line of Folsom Lake. 121 Comment
  CAS-BOT-BC113925  Cyperus odoratus John Thomas Howell 1974-9-19 50878 Sutter On the edge of rice fields, 1.7 mi S of Robbins on road to Knights landing. 7 Comment
  CAS-BOT-BC114099  Cyperus squarrosus John Thomas Howell 1962-9-25 s.n. Kern Bed of Kern River 3 mi. N of Kernville. 822 Comment
  CAS-BOT-BC114101  Cyperus squarrosus John Thomas Howell 1962-7-7 38153 Kern Kern River Canyon. 304 Comment
  CAS-BOT-BC114153  Cyperus squarrosus John Thomas Howell 1936-8-25 12777 Trinity Near Trinity Center. Comment
  CAS-BOT-BC67985  Cystopteris fragilis John Thomas Howell 1946-7-14 22301 Inyo Rock Creek Lake Basin - Mosquito Flat 3139 Comment
  CAS-BOT-BC70578  Cystopteris fragilis John Thomas Howell 1958-8-13 34372 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC189791  Dactylis glomerata John Thomas Howell 1943-8-9 19239 Glenn Plaskett Meadows. 1828 Comment
  CAS-BOT-BC189843  Dactylis glomerata John Thomas Howell 1960-8-20 36249 Tehama Near Lassen Volcanic National Park. Morgan. 1463 Comment
  CAS-BOT-BC445493  Damasonium californicum John Thomas Howell 1962-6-18 37824 Sierra Sierra Valley, 1.5 mi. e. of Calpine 1524 Comment
  CAS-BOT-BC293659  Deinandra corymbosa John Thomas Howell 1929-10-11 4453 Monterey Pt. Lobos Comment
  CAS-BOT-BC293979  Deinandra fasciculata John Thomas Howell 1931-5-29 6565 Ventura Little Sycamore Creek on Malibu Highway to Oxnard Comment
  CAS-BOT-BC294093  Deinandra kelloggii John Thomas Howell 1969-6-2 45787 Merced Santa Fe Drive near R Street, Merced Comment
  CAS-BOT-BC291785  Deinandra lobbii John Thomas Howell 1933-9-17 11683 Solano 2 miles west of Rio Vista Junction Comment
  CAS-BOT-BC291853  Deinandra lobbii John Thomas Howell 1930-10-24 5634 Monterey 17.2 miles east of The Indians, Santa Lucia Mts. Comment
  CAS-BOT-BC291797  Deinandra lobbii John Thomas Howell 1933-7-20 11450 Alameda Midway Comment
  CAS-BOT-BC9614  Delphinium californicum John Thomas Howell 1943-6-13 s.n. Marin Sausalito Comment
  CAS-BOT-BC9017  Delphinium decorum John Thomas Howell 1931-4-18 6413 Sonoma Larkspur Rock near Bodega Bay Comment
  CAS-BOT-BC8867  Delphinium glaucum John Thomas Howell 1925-7-2 1314 El Dorado Between Fallen Leaf Camp and Glen Alpine Lodge, Lake Tahoe region Comment
  CAS-BOT-BC8733  Delphinium hansenii var. arcuatum John Thomas Howell 1926-5-4 1972 Merced Merced Plains, 9 miles SW of Merced Comment
  CAS-BOT-BC10100  Delphinium luteum John Thomas Howell 1931-4-18 6415 Sonoma Larkspur Rock, near Bodega Bay Comment
  CAS-BOT-BC116019  Delphinium nuttallianum J. T. Howell 1958-8-17 34544 Madera Between Cora Lake and The Niche, East Fork of Granite Creek 2560 Comment
  CAS-BOT-BC7997  Delphinium parishii subsp. parishii J. T. Howell; Gordon H. True 1967-7-5 43074 Tulare Open sagebrush slope, 6.4 miles north of Chimney Meadow Kern Plateau Comment
  CAS-BOT-BC121743  Delphinium patens subsp. patens John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54264 Plumas About 1.4 mi. southeast of summit of Mt. Hough on road to Quincy 1950 Comment
  CAS-BOT-BC121910  Delphinium pratense John Thomas Howell 1950-7-20 27120 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC7770  Delphinium variegatum subsp. variegatum John Thomas Howell 1941-4-5 16175 Sonoma 1 mile S of El Verano Comment
  CAS-BOT-BC82841  Dendromecon harfordii John Thomas Howell 1931-4-12 6275 Santa Barbara Santa Cruz Island. Cochie Canyon. Comment
  UCD61128  Deschampsia cespitosa John Thomas Howell 1944-8-5 19980 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC192516  Deschampsia cespitosa subsp. cespitosa John Thomas Howell; Gordon H. True 1966-7-11 41620 Tulare Poison Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC198102  Deschampsia danthonioides John Thomas Howell 1924-5-30 356 Mariposa Wawona 1219 Comment
  CAS-BOT-BC201663  Deschampsia danthonioides John Thomas Howell 1948-4-26 24280 Tulare Near Earlimart 88 Comment
  CAS-BOT-BC198484  Deschampsia danthonioides John Thomas Howell 1965-4-25 41090 Madera Rolling vally lands 7 miles northeast of Madera. Comment
  CAS-BOT-BC195569  Deschampsia elongata John Thomas Howell 1944-8-5 19928 Tuolumne Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC201813  Deschampsia elongata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49467 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC43045  Descurainia incisa subsp. incisa John Thomas Howell 1942-8-5 17679 Tulare Between Big Arroyo and Chagoopa Plateau. Comment
  CAS-BOT-BC43090  Descurainia nelsonii John Thomas Howell 1934-7-7 12476 Lassen Harvey Valley. Comment
  CAS-BOT-BC43409  Descurainia pinnata subsp. glabra John Thomas Howell; Gordon H. True 1969-5-13 s.n. Tulare Sierra Nevada. Kern Plateau. Spanish Needle Creek road. 1280 Comment
  CAS-BOT-BC43443  Descurainia sophia John Thomas Howell 1958-5-25 33344 Inyo Sierra Nevada. Corral on Carroll Creek. 1676 Comment
  CAS-BOT-BC43504  Descurainia sophia John Thomas Howell 1975-7-22 s.n. Plumas Sierra Nevada. Quincy. 1036 Comment
  CAS-BOT-BC254523  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1961-9-22 36729 Butte Feather River, Oroville 53 Comment
  SEINET8159521 Image available Dichanthelium acuminatum var. thermale J. T. Howell 1939-1 15292 Unknown Comment
  CAS-BOT-BC500807  Dichelostemma capitatum John Thomas Howell 1956-6-10 31555 San Francisco North slope of Bay View Hills Comment
  RSA201452  Dichondra donelliana J. T. Howell 1947-5-8 23147 Marin Sausalito Comment
  CAS-BOT-BC292259  Dieteria canescens John Thomas Howell 1974-7-8 50470 Lassen Susanville 1295 Comment
  CAS-BOT-BC293003  Dieteria canescens John Thomas Howell; Gordon H. True 1967-9-18 43800 Tulare Long Valley. Kern Plateau 1767 Comment
  CAS-BOT-BC299788  Dieteria canescens var. canescens John Thomas Howell 1964-10-23 40989 Inyo Whitney Portal Road, Sierra Nevada 2255 Comment
  CAS-BOT-BC290947  Dieteria canescens var. shastensis John Thomas Howell 1943-8-10 19255 Glenn Black Butte Comment
  CAS-BOT-BC49471  Dieteria canescens var. shastensis John Thomas Howell 1934-7-1 12321 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC209068  Digitaria sanguinalis John Thomas Howell 1956-12-4 32001 Mariposa Merced River Canyon, 1 mile below South Fork confluence - Sierra Nevada Comment
  CAS-BOT-BC209116  Digitaria sanguinalis John Thomas Howell 1957-9-26 32981 Sonoma Sandy Russian River bottom near Guerneville. Comment
  CAS-BOT-BC152295  Diplacus congdonii John Thomas Howell 1946-3-24 21586 Marin Burned area in Carson country. Comment
  CAS-BOT-BC151931  Diplacus douglasii John Thomas Howell 1954-5-17 29721 El Dorado 1 mile southwest of Garden Valley - Sierra Nevada Comment
  CAS-BOT-BC151743  Diplacus kelloggii John Thomas Howell 1964-4-27 40537 Mariposa Merced River Canyon just west of El Portal - Sierra Nevada 640 Comment
  CAS-BOT-BC153541  Diplacus leptaleus John Thomas Howell 1942-7-30 17425 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC153568  Diplacus leptaleus John Thomas Howell 1944-8-11 20323 Tuolumne Lambert Dome, Tuolumne Meadows Comment
  CAS-BOT-BC151415  Diplacus mephiticus John Thomas Howell 1950-7-18 27060 Tulare Big dune, Bakeoven Meadows, South Fork of Kern River - Sierra Nevada 2468 Comment
  CAS-BOT-BC151388  Diplacus viscidus John Thomas Howell 1954-5-11 s.n. Amador Edge of chaparral, road n. of Buena Vista - Sierra Nevada Comment
  CAS-BOT-BC154242  Diplacus whitneyi John Thomas Howell; Gordon H. True 1970-7-29 47136 Tulare Pine Flat. Kern Plateau 2194 Comment
  UC1042323  Dirca occidentalis John Thomas Howell 1954-7-8 30012 San Mateo canyon 0.5 mi below Lake Pilarcitos Dam Comment
Read comments
Feb 2 2012
  CAS-BOT-BC195665  Distichlis spicata John Thomas Howell 1963-11-19 40388 Monterey Near Southern Pacific station, Monterey Comment
  CAS-BOT-BC208714  Distichlis spicata John Thomas Howell 1970-11-8 47542 Kern South Fork Kern River Bridge on road from Weldon to Kernville - Sierra Nevada 792 Comment
  POM203995  Dodecatheon clevelandii subsp. patulum J. T. Howell 1933-3-31 10917 San Francisco Bernal Heights. Comment
  UC517947  Dodecatheon hendersonii John Thomas Howell 1931-3-10 5756 Contra Costa on Livermore Road 7 mi from Clayton; e side Mt. Diablo, 7 mi from Clayton Comment
  CAS-BOT-BC41948  Draba albertina John Thomas Howell 1958-8-12 34304 Madera Sierra Nevada. Near Isberg Lake. 2987 Comment
  CAS-BOT-BC41967  Draba albertina John Thomas Howell 1946-7-19 22523 Fresno Fourth Recess. 3078 Comment
  CAS-BOT-BC42030  Draba albertina John Thomas Howell 1942-7-25 17181 Tulare Eagle Lake Trail near Mineral King. Comment
  RSA88500  Draba albertina J. T. Howell 1951-7-20 28003 Tulare Southeast of Farewell Gap. Mineral King and vicinity. 3293 Comment
  CAS-BOT-BC41579  Draba breweri John Thomas Howell 1950-7-22 27226 Tulare Summit ridge, Olanche Peak. 3698 Comment
  CAS-BOT-BC41831  Draba breweri John Thomas Howell 1947-8-7 23865 Inyo Big Pine Lakes. West of Sixth Lake. 3413 Comment
  CAS-BOT-BC41612  Draba corrugata var. corrugata John Thomas Howell 1947-7-23 23551 San Bernardino San Bernardino Mountains. Dollar Lake. 2865 Comment
  CAS-BOT-BC41644  Draba cruciata John Thomas Howell 1942-7-25 17156 Tulare Eagle Lake Trail near Mineral King. Comment
  CAS-BOT-BC41808  Draba lemmonii John Thomas Howell 1946-7-26 22747 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC41298  Draba praealta John Thomas Howell 1944-8-10 20262 Mono East wall of Glacier Canyon on way to Dana Plateau, Mount Dana. 3352 Comment
  GH379342  Draba sierrae J. T. Howell 1941-7-22 16381 Unknown Mono Pass, Fresno-Inyo Cos. 3505 Comment
  CAS-BOT-BC41385  Draba verna John Thomas Howell 1957-4-28 32050 Monterey Santa Lucia Mountains. Near Hastings Reservation. 594 Comment
  LA208036  Drymocallis glandulosa John Thomas Howell; 1930-6-8 5289 Sonoma 8.5 mi. N of Bodega Bay Comment
  CAS-BOT-BC159660  Drymocallis glandulosa John Thomas Howell 1960-6-5 35309 Fresno 2.8 mi. n. of Cherry Gap - Sierra Nevada 1828 Comment
  CAS-BOT-BC534993  Drymocallis glandulosa var. reflexa John Thomas Howell 1923-6-22 76 Mariposa Shady moist slope at Stella Lake, Wawona 1219 Comment
  CAS-BOT-BC428000  Dudleya caespitosa John Thomas Howell 1939-7-2 14824 A Marin Elk Valley Comment
  CAS-BOT-BC428004  Dudleya caespitosa John Thomas Howell 1946-6-30 22150 Marin Rodeo Lagoon Comment
  CAS-BOT-BC428223  Dudleya cymosa subsp. paniculata John Thomas Howell 1963-5-7 39263 Monterey On San Lorenzo Creek, 6 miles northeast of King City 182 Comment
  JEPS49946  Dudleya densiflora J. T. Howell 1928-6-12 Los Angeles Fish Canyon San Gabriel Mtns Comment
  CAS-BOT-BC291107  Eastwoodia elegans John Thomas Howell 1957-5-19 32317 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC197099  Echinochloa crus-galli John Thomas Howell 1973-7-9 49686 Butte West Branch of Feather River on Feather River highway 304 Comment
  CAS-BOT-BC197261  Echinochloa muricata var. microstachya John Thomas Howell 1980-9-8 53892 Marin Bottom of Alpine Lake near Bon Temple Lake dam Comment
  CAS-BOT-BC113753  Eleocharis acicularis John Thomas Howell 1950-7-18 27057 Tulare Bakeoven Meadows, South Fork of Kern River. Vicinity of mineral springs. 2468 Comment
  CAS-BOT-BC113547  Eleocharis bella John Thomas Howell 1944-8-5 19984 Tuolumne Near Parsons Lodge Comment
  CAS-BOT-BC112867  Eleocharis macrostachya John Thomas Howell 1944-6-25 19640 Marin San Rafel Comment
  CAS-BOT-BC112936  Eleocharis macrostachya John Thomas Howell 1957-8-6 32876 San Francisco Pond in Strybing Aboretum, Golden Gate Park Comment
  CAS-BOT-BC113331  Eleocharis montevidensis John Thomas Howell 1927-7-6 2660 Orange Wet soil of Santa Ana River bottom, Santa Ana Canyon. 152 Comment
  CAS-BOT-BC113144  Eleocharis palustris John Thomas Howell 1959-6-19 1210 Sierra Open meadow, summit Yuba Pass. 2042 Comment
  CAS-BOT-BC113310  Eleocharis parishii John Thomas Howell 1927-7-9 2681 San Bernardino Wet ground at Box S Spring, Mojave Desert. 1082 Comment
  CAS-BOT-BC112088  Eleocharis quinqueflora John Thomas Howell 1940-8-9 16082 Fresno Bullfrog Lake Comment
  CAS-BOT-BC112148  Eleocharis quinqueflora John Thomas Howell; Gordon H. True 1970-6-23 46651 Tulare Forest border, NE end of Big Meadow, Kern Plateau 2377 Comment
  RSA517885  Eleocharis radicans J. T. Howell 1967-11-5 44133 Kern Kern River 2 miles above Kernville. 823 Comment
  CAS-BOT-BC112253  Eleocharis rostellata John Thomas Howell 1962-9-25 38918 Kern Near Kernsville 807 Comment
  UCR139457  Elymus J. T. Howell 1947-8-8 23925 Inyo Sierra Nevada Mtns., Second to Third Lake, Big Pine Lakes 3049 Comment
  CAS-BOT-BC203827  Elymus X hansenii John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53069 Calaveras Near Dorrington 1524 Comment
  CAS-BOT-BC203835  Elymus X hansenii John Thomas Howell 1960-7-18 35597 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC203856  Elymus X hansenii John Thomas Howell 1948-5-31 24325 Marin Devils Gulch near Camp Taylor Comment
  UC1106101  Elymus X hansenii John Thomas Howell 1943-6-6 18206 Marin ridge se Muir Woods Comment
  CAS-BOT-BC127529  Elymus X saundersii John Thomas Howell 1949-8-7 26134 Tulare Rock Creek 3048 Comment
  UCD62824  Elymus X saundersii John Thomas Howell 1944-8-14 20450 A Tuolumne Glen Aulin Trail west of Delaney Creek, Tuolumne Meadows. Comment
  CAS-BOT-BC225720  Elymus elymoides John Thomas Howell; Gordon H. True 1971-7-15 48555 Tulare On Dome Lands Trail about 0.5 miles south of Church Dome, Kern Plateau, Sierra Nevada 2316 Comment
  CAS-BOT-BC225742  Elymus elymoides John Thomas Howell 1969-8-25 45915 Tulare Near site of former store, Mineral King, Sierra Nevada 2377 Comment
  CAS-BOT-BC227140  Elymus elymoides John Thomas Howell 1943-8-3 18978 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC227302  Elymus elymoides John Thomas Howell 1946-7-27 22787 Fresno Unglaciated ridge northwest of Mono Pass 3657 Comment
  UCD61543  Elymus elymoides John Thomas Howell 1944-8-9 20177 Tuolumne Near Parsons Lodge, Tuolumne Meadows. Comment
  UCD61498  Elymus elymoides var. californicus John Thomas Howell 1977-8-3 52564 Alpine Just north of Ebbetts Pass. 2682 Comment
  CAS-BOT-BC203441  Elymus glaucus subsp. glaucus John Thomas Howell 1946-8-30 22925 El Dorado Upper Angora Lake Comment
  CAS-BOT-BC203494  Elymus glaucus subsp. glaucus John Thomas Howell 1943-6-6 18209 Marin Canyon below Muir Woods Comment
  CAS-BOT-BC206736  Elymus glaucus subsp. glaucus John Thomas Howell 1947-7-18 23427 Los Angeles Big Pines, San Gabriel Mts. 2103 Comment
  CAS-BOT-BC206789  Elymus glaucus subsp. glaucus John Thomas Howell 1927-6-17 2553 Orange Hills on north side of Santa Ana Canyon. 152 Comment
  CAS-BOT-BC203813  Elymus glaucus subsp. virescens John Thomas Howell 1947-5-14 23161 Marin McClure Beach Comment
  CAS-BOT-BC234048  Elymus multisetus John Thomas Howell 1963-6-21 39483 Monterey Mustang Grade, east of San Lorenzo Creek Comment
  CAS-BOT-BC234108  Elymus multisetus John Thomas Howell 1962-6-15 37528 Butte Magalia, Sierra Nevada 731 Comment
  RSA127391  Elymus multisetus J. T. Howell 1941-5-25 16239 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC213821  Elymus repens John Thomas Howell 1976-7-15 51832 Plumas Quincy - Sierra Nevada 1051 Comment
  CAS-BOT-BC204404  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1967-6-23 42727 Plumas East Branch Feather River, 3.5 miles east of Rich Bar 762 Comment
  CAS-BOT-BC213520  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1942-8-5 17715 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  RSA299617  Elymus trachycaulus subsp. trachycaulus J. T. Howell 1973-7-10 49776 Lassen Fredonyer Pass 1738 Comment
  NY70338  Ephedra nevadensis J. T. Howell 1962-5-21 37146 Kern Sierra Nevada: northeast of Lake Isabella 792.5 Comment
  CAS-BOT-BC81945  Ephedra viridis John Thomas Howell 1948-6-14 24345 Kern Cedar Canyon 609 Comment
  CAS-BOT-BC82029  Ephedra viridis John Thomas Howell; Gordon H. True 1967-7-5 43123 Tulare 6 miles north of South Fork Kern River bridge on road to Troy Meadow, Kern Plateau 2286 Comment
  RSA44277  Epilobium anagallidifolium J. T. Howell 1947-8-9 23963 Inyo Seventh Lake. Big Pine Lakes. 3415 Comment
  CAS-BOT-BC191024  Epilobium brachycarpum John Thomas Howell 1934-7-1 12309 Modoc Duncan Horse Camp. 1355 Comment
  JEPS33712  Epilobium brachycarpum John Thomas Howell 1926-7-11 2054 Santa Clara San Antonio Valley 914 Comment
  RSA209510  Epilobium canum subsp. canum J. T. Howell 1963-8-7 40074 Monterey Mustang Grade between Mustang Summit and San Lorenzo Creek. Comment
  RSA44281  Epilobium hornemannii subsp. hornemannii J. T. Howell 1947-8-15 24126 Inyo Fifth Lake, Big Pines Lake. 3354 Comment
Read comments
Dec 22 2008
  POM259601  Epilobium lactiflorum J. T. Howell 1939-8-2 14868 Siskiyou Spirit Lake, Marble Mountains. 1829 Comment
  CAS-BOT-BC56948  Equisetum arvense John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49463 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC56967  Equisetum arvense John Thomas Howell 1960-8-22 36391 Shasta Hat Lake 1950 Comment
  CAS-BOT-BC57007  Equisetum arvense John Thomas Howell 1977-6-21 52385 Plumas Seneca 1097 Comment
  CAS-BOT-BC57072  Equisetum arvense John Thomas Howell 1950-7-24 26872 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC57952  Equisetum arvense John Thomas Howell 1954-5-16 29651 El Dorado Placerville. 563 Comment
  CAS-BOT-BC57858  Equisetum hyemale subsp. affine John Thomas Howell 1946-4-14 21610 Marin Near Tomales. Comment
  CAS-BOT-BC57272  Equisetum laevigatum John Thomas Howell 1958-5-28 33611 Inyo Bishop Creek 1524 Comment
  CAS-BOT-BC57397  Equisetum laevigatum John Thomas Howell 1959-9-25 35003 Plumas 2 miles east of Portola 1484 Comment
  CAS-BOT-BC57776  Equisetum laevigatum John Thomas Howell; Gordon H. True 1970-6-25 46784 Tulare E. branch of Salmon Creek, Big Meadow to Sirretta Meadows. Kern Plateau. 2590 Comment
  CAS-BOT-BC57781  Equisetum laevigatum John Thomas Howell 1962-5-22 37359 Tulare Johnsondale. 1423 Comment
  CAS-BOT-BC57484  Equisetum laevigatum John Thomas Howell 1944-8-3 19865 Tuolumne West side of Sonora Pass 2346 Comment
  CAS-BOT-BC57546  Equisetum telmateia John Thomas Howell 1946-4-14 21615 Marin Near Tomales Comment
  CAS-BOT-BC213571  Eragrostis hypnoides John Thomas Howell 1955-9-13 30913 Sonoma Sand bar of Russian River at Odd Fellows Park above Guerneville. Comment
  CAS-BOT-BC204646  Eragrostis mexicana subsp. virescens John Thomas Howell 1954-9-6 30095 Tuolumne Between Tuttletown and Rawhide Comment
  CAS-BOT-BC213625  Eragrostis mexicana subsp. virescens John Thomas Howell; G. H. True 1973-7-31 50145 Lassen Susanville 1295 Comment
  CAS-BOT-BC284062  Eragrostis pectinacea var. pectinacea John Thomas Howell 1956-12-4 32012 Mariposa Merced River at confluence of South Fork, Sierra Nevada 426 Comment
  CAS-BOT-BC284195  Eragrostis pectinacea var. pectinacea John Thomas Howell 1981-10-14 54625 Sutter Oak Hill Ranch south side of Sutter Buttes Comment
  CAS-BOT-BC174092  Eremogone aculeata John Thomas Howell 1925-6-28 1233 El Dorado Near Velma Lakes on trail to Eagle Lake, Lake Tahoe region Comment
  CAS-BOT-BC174165  Eremogone aculeata John Thomas Howell 1944-8-14 20474 Tuolumne Tuolumne Canyon above Glen Aulin Comment
  UCR88855  Eremogone ferrisiae J. T. Howell 1958-5-28 33535 Inyo Sierra Nevada Mtns, Bishop Creek 1951 Comment
  SEINET12875650 Image available Eremogone ferrisiae John Thomas Howell, Gordon H. True 1967-1 43097 Tulare Near road bridge on South Fork of Kern River in Kennedy Meadows. Kern Plateau. 1890 Comment
  CAS-BOT-BC160094  Eremothera boothii subsp. condensata John Thomas Howell 1928-3-24 3503 San Diego Near Palm Wash, w. Colorado Desert Comment
  CAS-BOT-BC514336  Eriastrum densifolium subsp. austromontanum John Thomas Howell 1947-7-22 23479 San Bernardino San Bernardino Mts. South Fork, Santa Ana River 2225 Comment
  UC908106  Eriastrum eremicum subsp. eremicum John Thomas Howell 1927-8-1 2890 San Bernardino upper part of Morongo Valley Mojave(?) Desert (e end) Comment
  RSA0121583  Eriastrum sapphirinum subsp. dasyanthum J. T. Howell 1928-7-9 1069 Riverside San Juan Canyon Road, Elsinore Mts. 793 Comment
  RSA0122054  Eriastrum sapphirinum subsp. dasyanthum J. T. Howell 1928-6-30 1020 Ventura Santa Susana Pass. 457 Comment
  CAS-BOT-BC291258  Ericameria bloomeri John Thomas Howell; Gordon H. True 1966-7-12 41837 Kern Just east of Fay Creek Canyon, Kern Plateau 2194 Comment
  GH387262  Ericameria bloomeri J. T. Howell & G. H. True 1959-9-24 34956 Unknown Near Cromberg 1249 Comment
  CAS-BOT-BC286858  Ericameria discoidea John Thomas Howell 1949-8-4 26016 Tulare Ridge west of Siberian Pass 3352 Comment
  CAS-BOT-BC286871  Ericameria discoidea John Thomas Howell 1950-7-22 27186 Tulare Olancha Peak 3291 Comment
  CAS-BOT-BC298946  Ericameria nauseosa var. ceruminosa John Thomas Howell 1967-11-5 44169 Kern Kern River Canyon about 2.5 miles above Kernville 838 Comment
  JEPS75275  Ericameria nauseosa var. ceruminosa John Thomas Howell 1970-11-8 47543 Kern near South Fork Kern River bridge on road from Weldon to Kernville (nw of Weldon); Sierra Nevada 792 Comment
  JEPS75268  Ericameria nauseosa var. mohavensis John Thomas Howell and Gordon H. True 1967-9-18 43745 Tulare Chimney Meadow Sierra Nevada, The Kern Plateau 1889 Comment
  CAS-BOT-BC294159  Ericameria nauseosa var. speciosa John Thomas Howell 1950-8-29 27455 Inyo Onion Valley road 2286 Comment
  CAS-BOT-BC299462  Ericameria nauseosa var. speciosa John Thomas Howell 1969-9-13 46100 Sierra Little Truckee River near outlet of Webber Lake, Sierra Nevada 2042 Comment
  GH417394  Ericameria paniculata J. T. Howell 1927-11-26 3257 Unknown San Felipe Wash Comment
  CAS-BOT-BC294452  Ericameria parryi var. aspera John Thomas Howell 1938-8-10 14501 Mono Near Crestview Comment
  CAS-BOT-BC293475  Erigeron algidus John Thomas Howell 1940-8-1 15859 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC294594  Erigeron breweri var. breweri John Thomas Howell 1958-8-2 34209 Fresno Copper Creek Canyon trail 2133 Comment
  CAS-BOT-BC297052  Erigeron breweri var. breweri John Thomas Howell 1949-8-13 26272 Inyo Little Cottonwood Creek 2926 Comment
  CAS-BOT-BC299571  Erigeron breweri var. breweri John Thomas Howell 1950-7-12 26687 Inyo Sage Flat to Olancha Pass, Sierra Nevada 2133 Comment
  CAS-BOT-BC294840  Erigeron breweri var. covillei John Thomas Howell 1958-5-25 33377 Inyo Carroll Creek 1676 Comment
  CAS-BOT-BC295007  Erigeron compositus John Thomas Howell 1946-7-26 22737 Inyo Mono Mesa 3657 Comment
  RSA39964  Erigeron compositus J. T. Howell 1943-7-18 18539 Nevada Castle Peak Comment
  CAS-BOT-BC300763  Erigeron glacialis var. glacialis John Thomas Howell 1944-8-8 20166 Mariposa High gap south of Elizabeth Lake Comment
  CAS-BOT-BC295718  Erigeron petrophilus var. petrophilus John Thomas Howell 1923-11-12 249 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC295793  Erigeron petrophilus var. sierrensis John Thomas Howell 1951-6-27 27625 Plumas Jamison Creek 1828 Comment
  CAS-BOT-BC300218  Erigeron pygmaeus John Thomas Howell 1949-8-10 26203 Tulare Soldier Lakes 3383 Comment
  CAS-BOT-BC216103  Eriodictyon californicum John Thomas Howell 1927-8-20 3030 Santa Clara Near Big Basin, Santa Cruz Mts. 609 Comment
  A402877  Eriodictyon tomentosum J. T. Howell 1933-8-18 11565 Unknown 17 miles east of Jamesburg, Santa Lucia Mts. Comment
  CAS-BOT-BC255453  Eriogonum ampullaceum John Thomas Howell 1950-7-27 27405 Mono Slopes 2 1/2 miles north of Bridgeport 1965 Comment
  CAS-BOT-BC248718  Eriogonum arborescens John Thomas Howell 1928-5-19 3791 Ventura Anacapa Island Comment
  UC517470  Eriogonum argillosum John Thomas Howell 1933-4-23 11158 San Benito 11 mi on raod to San Benito Hernandez Comment
Read comments
Jun 2 2016
  UCD99761  Eriogonum baileyi John Thomas Howell 1970-11-8 47528 Kern east end of east arm of Lake Isabella. 792 Comment
  CAS-BOT-BC248793  Eriogonum baileyi var. baileyi John Thomas Howell 1950-8-29 27450 Inyo Onion Valley road 2286 Comment
  CAS-BOT-BC244028  Eriogonum baileyi var. baileyi John Thomas Howell; Gordon H. True 1967-8-9 43619 Tulare 6 miles from Kennedy Meadows on road to Troy Meadow, Kern Plateau, Sierra Nevada 2286 Comment
  CAS-BOT-BC241718  Eriogonum brachyanthum John Thomas Howell 1933-6-29 11399 San Bernardino Victorville Comment
  OBI11039  Eriogonum clavatum John Thomas Howell 1948-6-14 24339 San Luis Obispo Cholame Crk W of Shandon Comment
  CAS-BOT-BC256237  Eriogonum deflexum var. baratum John Thomas Howell 1949-8-13 26293 Inyo East slope of Wonoga Peak 2743 Comment
  CAS-BOT-BC255724  Eriogonum eastwoodianum John Thomas Howell 1963-6-22 39585 Fresno Road to Parkfield 14 miles from Coalinga Comment
  CAS-BOT-BC246524  Eriogonum elatum var. elatum John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-13 54598 Mono Old Sherwin Grade Road 0.75 mile south of Tom's Place 2048 Comment
  CAS-BOT-BC246571  Eriogonum elegans John Thomas Howell 1933-8-17 11537 San Benito 4 miles north of the Pinnacles Comment
  CAS-BOT-BC253170  Eriogonum elongatum var. elongatum John Thomas Howell 1933-8-17 11529 San Benito The Pinnacles Comment
  UCD100003  Eriogonum fasciculatum var. foliolosum John Thomas Howell 1955-7-16 30657 Trinity Trinity River Canyon, 2 miles east of Junction City. 487 Comment
  CAS-BOT-BC250435  Eriogonum gracile John Thomas Howell 1963-8-7 40102 Monterey Western edge of Priest Valley on road to Coalinga Comment
  CAS-BOT-BC253515  Eriogonum gracile John Thomas Howell 1933-8-17 11555 San Benito Near Hernandez Comment
  CAS-BOT-BC252210  Eriogonum gracillimum John Thomas Howell 1931-6-6 6674 Kern Bakersfield Comment
  CAS-BOT-BC261235  Eriogonum hirtiflorum John Thomas Howell 1960-6-7 35411 Fresno Kings Canyon Road 6.5 mi. NE of Cherry Gap, Sierra Nevada 1554 Comment
  POM273219B  Eriogonum hirtiflorum J. T. Howell 1945-6-18 20993 Lake Bottlerock Road Comment
  CAS-BOT-BC266020  Eriogonum latifolium John Thomas Howell 1956-9-9 31864 San Francisco SE end of Lake Merced, San Francisco Comment
  RSA766132  Eriogonum latifolium J. T. Howell 1930-6-8 5257 Sonoma 1 mile east of Bodega Bay Comment
  CAS-BOT-BC259379  Eriogonum lobbii John Thomas Howell 1944-8-14 20461 Tuolumne Tuolumne Canyon above Glen Aulin Comment
  CAS-BOT-BC259370  Eriogonum lobbii John Thomas Howell 1943-8-8 19175 Tehama Anthony Peak, Tehama - Mendocino Co. Comment
  CAS-BOT-BC259406  Eriogonum luteolum John Thomas Howell 1940-6-30 15591 Lake Soda Bay Comment
  CAS-BOT-BC263100  Eriogonum maculatum John Thomas Howell 1962-5-21 37179 Kern Northeast of Lake Isabella 792 Comment
  CAS-BOT-BC263109  Eriogonum maculatum John Thomas Howell 1930-5-13 4963 Kern Red Rock Canyon Comment
  CAS-BOT-BC263184  Eriogonum marifolium var. cupulatum John Thomas Howell 1934-7-4 12395 Siskiyou Se. corner of Siskiyou Co. Comment
  CAS-BOT-BC263298  Eriogonum marifolium var. marifolium John Thomas Howell 1951-6-28 27693 Plumas Eureka Peak 2133 Comment
  CAS-BOT-BC268768  Eriogonum mohavense John Thomas Howell 1930-5-13 4987 Kern 5 miles north of Ricardo Comment
  POM181017  Eriogonum nidularium J. T. Howell 1928-6-14 3911 Inyo Surprise Canyon, near Panamint City, Panamint Mountains. Comment
  CAS-BOT-BC268933  Eriogonum nudum var. auriculatum John Thomas Howell 1939-9-10 15361 Marin Stinson Beach Comment
  POM179710  Eriogonum nudum var. auriculatum J. T. Howell 1930-7-4 5337 Contra Costa Rocky hilltop in the north Berkeley Hills. Comment
  RSA66261  Eriogonum nudum var. auriculatum J. T. Howell 1929-7-12 4346 Merced Sandy flats above Merced River bottom, northwest of Hopeton Bridge Comment
  CAS-BOT-BC261507  Eriogonum nudum var. nudum John Thomas Howell 1930-8-24 5448 Lake 4 miles from Middletown on Adams Springs Road Comment
  CAS-BOT-BC261543  Eriogonum nudum var. nudum John Thomas Howell 1931-6-16 6712 Mendocino 10 miles s. of Laytonville Comment
  CAS-BOT-BC253121  Eriogonum nudum var. scapigerum John Thomas Howell 1941-7-30 16512 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC258619  Eriogonum ovalifolium var. nivale John Thomas Howell 1948-7-28 25112 Tulare Center Basin 3657 Comment
  CAS-BOT-BC258631  Eriogonum ovalifolium var. nivale John Thomas Howell 1947-8-7 23861 Inyo West of Sixth Lake, Big Pine Lakes 3413 Comment
  CAS-BOT-BC265551  Eriogonum parishii John Thomas Howell 1950-7-12 26705 Inyo Sage Flat to Olancha Pass, Sierra Nevada 2743 Comment
  CAS-BOT-BC257866  Eriogonum parvifolium John Thomas Howell 1933-8-19 11594 Monterey Carmel Valley, 4 miles e. of Carmel Comment
  UCD100852  Eriogonum pusillum John Thomas Howell; Gordon H. True 1967-5-30 42451 Tulare Kern Plateau, 15 miles from Lamont Meadow, on road to Long Valley. 1737 Comment
  CAS-BOT-BC258332  Eriogonum rixfordii John Thomas Howell 1928-6-20 4063 A Inyo Jail Canyon near the Burro Mine, Panamint Mts. Comment
  CAS-BOT-BC258499  Eriogonum roseum John Thomas Howell 1970-9-25 47436 Kern Kernville 807 Comment
  CAS-BOT-BC267729  Eriogonum roseum John Thomas Howell 1923-8-2 220 Mariposa Wawona Meadow 1219 Comment
  CAS-BOT-BC267758  Eriogonum roseum John Thomas Howell 1927-11-13 3201 Los Angeles 1 1/2 miles east of Elizabeth Lake, Lieber Mts. 914 Comment
  CAS-BOT-BC268396  Eriogonum roseum John Thomas Howell 1933-8-13 11495 Santa Clara Smith Creek, Mt. Hamilton Comment
  GH364481  Eriogonum siskiyouense J. T. Howell 1937-7-29 13627 Unknown Scott Mountain between Trinity and Siskiyou counties Comment
  CAS-BOT-BC268595  Eriogonum spergulinum var. pratense John Thomas Howell 1949-7-30 25951 Tulare Ramshaw Meadows 2682 Comment
  CAS-BOT-BC272561  Eriogonum spergulinum var. reddingianum John Thomas Howell 1963-7-12 39851 El Dorado Meyers 1935 Comment
  CAS-BOT-BC272631  Eriogonum spergulinum var. reddingianum John Thomas Howell 1958-8-9 34250 Madera Miller Meadow 2103 Comment
  NY283068  Eriogonum spergulinum var. reddingianum J. T. Howell 1934-6-14 12123 Modoc Near Lost Lake, Warner Mountains 2438.4 Comment
  UCD101251  Eriogonum spergulinum var. reddingianum John Thomas Howell; Gordon H. True 1970-7-29 47066 Tulare Kern Plateau; west side of Big Meadow at Salmon Creek. 2377 Comment
  CAS-BOT-BC271872  Eriogonum spergulinum var. spergulinum John Thomas Howell 1977-8-3 52520 Alpine Just north of Ebbetts Pass 2682 Comment
  CAS-BOT-BC271934  Eriogonum spergulinum var. spergulinum John Thomas Howell; Gordon H. True 1970-7-29 47068 Tulare West side of Big Meadow at Salmon Creek, Kern Plateau 2377 Comment
  NY762353  Eriogonum strictum var. anserinum J. T. Howell 1934-7-7 12478 Lassen Harvey Valley Comment
  UC526210  Eriogonum truncatum John Thomas Howell 1934-4-8 11816 Contra Costa 10 mi on Marsh Creek Road Clayton Comment
  CAS-BOT-BC267978  Eriogonum umbellatum var. argus John Thomas Howell 1937-7-29 13629 Siskiyou Scott Mt. between Trinity and Siskiyou cos. Comment
  CAS-BOT-BC267875  Eriogonum umbellatum var. bahiiforme John Thomas Howell 1943-8-5 19083 Glenn Plaskett Meadows 1828 Comment
  RSA40220  Eriogonum umbellatum var. bahiiforme J. T. Howell 1943-8-10 s.n. Glenn Black Butte Comment
  UCD101413  Eriogonum umbellatum var. bahiiforme John Thomas Howell 1963-8-20 40142 Kern Walker Pass. 1600 Comment
  CAS-BOT-BC265089  Eriogonum umbellatum var. nevadense John Thomas Howell 1946-7-14 22289 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  SEINET5331927  Eriogonum umbellatum var. nevadense J. T. Howell 1963-8-22 40270 Mono 2.5 miles south of Crestview. Comment
  POM260788  Eriogonum umbellatum var. polyanthum Thomas Howell 1940-6-13 8115 Modoc [Unspecified] Comment
  CAS-BOT-BC264126  Eriogonum vimineum John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1967-7-10 2184 Plumas Mouth of Butterfly, Butterfly Botanical Area and vicinity 883 Comment
  CAS-BOT-BC262350  Eriogonum vimineum John Thomas Howell 1955-8-24 30903 Contra Costa Near summit of South Peak, Mt. Diablo 1158 Comment
  POM261439  Eriogonum wrightii var. subscaposum J. T. Howell 1940-8-10 16140 Fresno Zumwalt Meadows, Kings River Canyon. Comment
  UCR89188  Eriophyllum ambiguum J. T. Howell 1958-5-23 33200 Kern Sierra Nevada Mtns, 10 mi east of Onyx. 1037 Comment
  CAS-BOT-BC298364  Eriophyllum ambiguum var. ambiguum John Thomas Howell 1983-4-19 54731 Kern Kern River Preserve of The Nature Conservancy, South Fork Valley near Weldon Comment
  CAS-BOT-BC298417  Eriophyllum ambiguum var. paleaceum John Thomas Howell 1928-6-14 3923 Inyo Surprise Canon near Panamint City, Panamint Mts 2133 Comment
  CAS-BOT-BC297328  Eriophyllum confertiflorum John Thomas Howell 1927-6-1 2402 Orange Southern Puente Hills at the Santa Ana Canon 152 Comment
  CAS-BOT-BC300938  Eriophyllum jepsonii John Thomas Howell 1937-5-20 12985 San Benito 10 miles east of Paicines Comment
  CAS-BOT-BC49556  Eriophyllum lanatum John Thomas Howell 1934-6-11 11931 Modoc Parker Creek, Warner Mountains 1584 Comment
  CAS-BOT-BC49563  Eriophyllum lanatum John Thomas Howell 1934-6-13 12103 Modoc North fork of Barber Creek, Warner Mountains 1828 Comment
  RSA97649  Eriophyllum lanatum var. achilleoides J. T. Howell 1950-7-5 26636 Contra Costa Brushy slope above Nortonville Comment
  CAS-BOT-BC301210  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1939-4-23 14602 Marin Blythedale Canyon, Mill Valley Comment
  CAS-BOT-BC301464  Eriophyllum lanatum var. integrifolium John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54434 Amador On Carson Pass road just west of Carson Spur near Kirkwood 2407 Comment
  CAS-BOT-BC301576  Eriophyllum lanatum var. integrifolium John Thomas Howell 1943-7-18 18516 Nevada Castle Peak Comment
  CAS-BOT-BC308464  Eriophyllum staechadifolium John Thomas Howell 1956-9-9 31873 San Francisco Lake Merced, San Francisco Comment
  UCR11860  Eryngium jepsonii J. T. Howell 1933-9-17 11696 Solano San Francisco Bay Region, Near Benicia 82 Comment
  GH379445  Erysimum capitatum J. T. Howell & G. H. True 1970-6-24 46669 Unknown Big Meadow to North Manter Pass on trail to Manter Meadow, Kern Plateau 2438 Comment
  CAS-BOT-BC40787  Erysimum capitatum John Thomas Howell 1938-5-29 13873 Madera 4.5 miles from Coarse Gold on road to O'Neal's. Comment
  CAS-BOT-BC55125  Erysimum perenne John Thomas Howell 1942-7-25 17158 Tulare Eagle Lake Trail near Mineral King. Comment
  UC1042408  Erythronium purpurascens John Thomas Howell 1951-6-28 27684 Plumas Eureka Peak 1981 Comment
  CAS-BOT-BC110546  Eschscholzia John Thomas Howell; R. C. Barneby 1954-5-9 29294 Fresno Sierra Nevada. 2 miles west of Miramonte. 853 Comment
  CAS-BOT-BC403331  Eschscholzia californica John Thomas Howell 1963-6-22 39570 Monterey Priest Valley 685 Comment
  RSA312  Eschscholzia californica var. peninsularis J. T. Howell 1927-6-22 194 Orange Botany Garden, Rancho Santa Ana. Comment
  UC473567  Eschscholzia hypecoides John Thomas Howell 1931-3-23 5998 Monterey Poncho Rico Canyon Comment
  CAS-BOT-BC310451  Eucephalus ledophyllus var. covillei John Thomas Howell 1943-8-10 19245 Glenn Black Butte Comment
  UCD142416  Euphorbia oblongata John Thomas Howell 1974-4-25 50327 Marin Ross. Along Lagunitas Road. Comment
  CAS-BOT-BC202456  Euphorbia ocellata John Thomas Howell 1973-11-2 50307 Kern About 5 mile east of Maricopa Comment
  CAS-BOT-BC312156  Eurybia integrifolia John Thomas Howell 1943-7-21 18687 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC310542  Eurybia integrifolia John Thomas Howell 1960-7-21 35794 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC312255  Euthamia occidentalis John Thomas Howell 1930-10-25 5673 Monterey Arroyo Seco River, Santa Lucia Mts. Comment
  CAS-BOT-BC278263  Festuca brachyphylla subsp. breviculmis John Thomas Howell 1948-7-28 25142 Tulare North side of Junction Pass 3962 Comment
  SBBG41107  Festuca bromoides J. T. Howell 1963-5-18 Monterey 2.5 mi S of Aromas 60 Comment
  CAS-BOT-BC278323  Festuca californica subsp. californica John Thomas Howell 1943-5-15 18086 Marin Tiburon Peninsula Comment
  CAS-BOT-BC247717  Festuca idahoensis John Thomas Howell 1934-7-3 12376 Modoc 5 mi. S of Hackamore. Comment
  CAS-BOT-BC278435  Festuca idahoensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49459 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC278460  Festuca idahoensis John Thomas Howell 1934-6-14 12168 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC278986  Festuca rubra John Thomas Howell 1939-6-18 14780 Marin Near Mud Lake Comment
  RSA300180  Festuca rubra J. T. Howell, Gordon H. True 1969-6-23 45841 Plumas Quincy. 1037 Comment
  CAS-BOT-BC279027  Festuca rubra John Thomas Howell 1960-7-23 35933 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC278591  Festuca saximontana John Thomas Howell 1942-7-31 17471 Tulare Mt. Kaweah Comment
  CAS-BOT-BC278618  Festuca subulata John Thomas Howell 1958-7-23 33839 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC282569  Festuca viridula John Thomas Howell 1951-6-28 27702 Plumas Eureka Peak 2255 Comment
  CAS-BOT-BC77675  Ficus carica John Thomas Howell 1961-11-1 37074 Alameda Lakeside Park, Oakland Comment
  CAS-BOT-BC459436  Fragaria virginiana subsp. platypetala John Thomas Howell 1946-7-14 22339 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC459340  Fragaria virginiana var. platypetala John Thomas Howell 1950-7-17 27002 Tulare Trail from Bakeoven to Templeton Meadows 2682 Comment
  CAS-BOT-BC53445  Frangula californica subsp. tomentella John Thomas Howell 1954-5-17 29704 El Dorado 1 mile southwest of Garden Valley 609 Comment
  CAS-BOT-BC59558  Frangula rubra subsp. rubra John Thomas Howell 1953-5-25 29042 Tuolumne Twain Harte 1127 Comment
  CAS-BOT-BC223682  Frankenia salina John Thomas Howell 1928-5-19 3814 Ventura Anacapa Island Comment
  CAS-BOT-BC223441  Fraxinus dipetala John Thomas Howell 1963-6-22 39564 Monterey Priest Valley 685 Comment
  CAS-BOT-BC212421  Fremontodendron californicum John Thomas Howell; Gordon H. True 1966-7-13 41869 Tulare Brush Creek Canyon grade on Cherry Hill Road, Sierra Nevada 1645 Comment
  CAS-BOT-BC130177  Fritillaria affinis John Thomas Howell 1924-3-22 289 Sonoma Camp Meeker Comment
  CAS-BOT-BC130008  Fritillaria affinis John Thomas Howell 1926-3-21 1719 Lake St. Helena Creek below Patten's 609 Comment
  JEPS44807  Galium angustifolium subsp. onycense John Thomas Howell and Gordon H. True 1966-7-12 41811 Kern rim of plateau just e Fay Creek Canyon; Sierra Nevada, Kern Plateau 2194 Comment
  GH385871  Galium bolanderi J. T. Howell 1931-4-3 6135 Unknown Pope Creek Canyon, 8.5 miles from Monticello, Napa Range Comment
  CDA6658  Galium divaricatum J. T. Howell 1943-6-19 18237 Napa Hills west of Napa Valley between St. Helena and Mt. St. John Comment
  RSA39976  Galium grayanum var. grayanum J. T. Howell 1943-7-26 18840 Placer Mt. Lincoln. Comment
  CAS-BOT-BC217572  Galium hypotrichium subsp. subalpinum John Thomas Howell 1947-8-11 24011 Inyo South end of Coyote Ridge 3657 Comment
  CAS-BOT-BC223179  Galium nuttallii subsp. insulare John Thomas Howell 1931-4-14 6376 Santa Barbara China Harbor, Santa Cruz Island Comment
  CAS-BOT-BC303498  Gamochaeta ustulata John Thomas Howell; Catherine Best; Gordon H. True 1982-5-6 54696 Sonoma Bouverie Audubon Preserve, about 1.5 miles E of Glen Ellen near Stuart Creek 137 Comment
  CAS-BOT-BC199055  Garrya congdonii John Thomas Howell 1939-5-7 14652 Napa On Lower Lake-Knoxville Road at Lake Co. line. Comment
  CAS-BOT-BC194533  Garrya elliptica John Thomas Howell 1944-4-13 19380 Marin Big Rock Ridge west of Hamilton Field Comment
  A401775  Garrya flavescens subsp. congdonii J. T. Howell 1939-5-7 14652 Unknown On Lower Lake-Knoxville road at Lake Co. line Comment
  A401899  Garrya fremontii J. T. Howell 1942-9-6 17864 Unknown Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC169857  Garrya fremontii John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54373 Plumas 0.75 miles northeast of Bucks Summit on road to Quincy 1600 Comment
  CAS-BOT-BC282606  Gastridium phleoides John Thomas Howell 1962-6-16 37592 Butte 3.5 mi. n. of Pentz, Sierra Nevada 396 Comment
  CAS-BOT-BC478521  Gayophytum John Thomas Howell 1958-8-2 34200 Fresno Copper Creek Canyon trail 2286 Comment
  CAS-BOT-BC478867  Gayophytum John Thomas Howell; Gordon H. True 1967-7-3 42864 Tulare Rockhouse Meadow 1706 Comment
  RSA512821  Gayophytum eriospermum J. T. Howell 1962-7-8 38260 Kern Black Mountain, south side. Greenhorn Mountains. 1433 Comment
  SD130495  Gayophytum heterozygum John Thomas Howell 1978-7-29 53350 Nevada Disturbed ground along roadside, 5 miles north of Truckee on road to Sierraville. Comment
  UCD105708  Genista John Thomas Howell 1956-4-22 31275 San Francisco At base of north cliffs of Telegraph Hill. Comment
  UC904957  Gentiana newberryi John Thomas Howell 1949-7-19 25515 Tulare Rock Creek Sierra Nevada 3200 Comment
  RSA0029463  Geranium potentilloides J. T. Howell 1969-4-20 45514 Marin Meadow Trail to Mt. Wittenberg, Pt. Reyes National Seashore. Comment
  UCD103469  Geranium potentilloides John Thomas Howell 1946-6-16 s.n. Marin Inverness Park. Comment
  RSA120472  Gilia achilleifolia subsp. multicaulis J. T. Howell 1957-5-19 32328 Stanislaus Mount Oso 1006 Comment
  CAS-BOT-BC226208  Gilia interior John Thomas Howell 1976-5-18 51738 Kern 2.3 mi. from Alta Sierra. Along old road from Alta Sierra to Wofford Heights, Greenhorn Mountains Comment
  CAS-BOT-BC402088  Gilia ochroleuca subsp. bizonata John Thomas Howell 1962-5-21 37189 Kern Northeast of Lake Isabella 792 Comment
  CAS-BOT-BC407835  Gilia ochroleuca subsp. ochroleuca John Thomas Howell; Gordon H. True 1967-5-30 42479 Tulare Sierra Nevada, Kern Plateau, about midway between Lamont Meadow and Long Valley 1554 Comment
  CAS-BOT-BC283876  Glyceria borealis John Thomas Howell; Gordon H. True 1968-6-10 44558 Plumas Quincy. Spanish Creek at Gansner Grove 1036 Comment
  CAS-BOT-BC282706  Glyceria elata John Thomas Howell 1951-6-28 27647 Plumas Johnsville, Sierra Nevada 1584 Comment
  CAS-BOT-BC282711  Glyceria elata John Thomas Howell 1960-7-20 35721 Plumas Drakesbad, Lassen Volcanic National Park 1828 Comment
  RSA32496  Gnaphalium beneolens J. T. Howell 1945-9-2 21455 Marin San Rafael Hills Comment
  UC710549  Gnaphalium palustre John Thomas Howell 1943-7-19 18583 Placer Summit Valley Comment
  CAS-BOT-BC303899  Gnaphalium palustre John Thomas Howell 1925-5-10 1041 A Merced Merced River bottom between Snelling and Hopeton Comment
  CAS-BOT-BC304437  Grindelia hirsutula John Thomas Howell 1939-9-3 15330 Marin Corte Madera Comment
  CAS-BOT-BC304473  Grindelia hirsutula J. T. Howell 1933-7-23 s.n. Marin Sausalito Hills Comment
  CAS-BOT-BC304488  Grindelia hirsutula John Thomas Howell 1933-10-8 11701 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC304889  Grindelia hirsutula John Thomas Howell 1932-10-8 10804 Napa Cuttings Wharf on Napa River Comment
  CAS-BOT-BC304929  Grindelia hirsutula John Thomas Howell 1959-9-21 34826 Plumas Greenville 1088 Comment
  CAS-BOT-BC305003  Grindelia hirsutula John Thomas Howell 1931-10-11 8133 Mariposa Mariposa Comment
  CAS-BOT-BC305051  Grindelia hirsutula John Thomas Howell 1933-9-15 11656 San Francisco Laguna Honda, San Francisco Comment
  CAS-BOT-BC305138  Grindelia hirsutula J. T. Howell 1930-5-19 5179 Santa Barbara Summerland Comment
  CAS-BOT-BC314672  Grindelia hirsutula John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54072 Yuba 1.4 miles southwest of Bullards Bar Dam, on road to Challenge 609 Comment
  CAS-BOT-BC305224  Grindelia hirsutula John Thomas Howell 1930-9-28 5495 Contra Costa Liberty School on Marsh Creek Road Comment
  CAS-BOT-BC305229  Grindelia hirsutula John Thomas Howell 1929-7-7 4322 Contra Costa 2 miles s. of Rodeo Comment
  CAS-BOT-BC314626  Grindelia hirsutula John Thomas Howell 1934-6-16 12224 Shasta 3.5 miles NE of McArthur Comment
  CAS-BOT-BC123707  Grindelia hirsutula var. hirsutula John Thomas Howell 1930-7-13 5338 Sonoma Black Point Road Comment
  CAS-BOT-BC304683  Grindelia squarrosa John Thomas Howell 1974-9-20 50907 Plumas Chilcoot 1554 Comment
  GH417724  Grindelia stricta var. angustifolia J. T. Howell 1933-7-30 11482 Unknown Inverness Comment
  GH417698  Grindelia stricta var. platyphylla J. T. Howell 1932-10-19 10862 Unknown mouth of Waddell Creek Comment
  UC1106257  Guillenia lasiophylla John Thomas Howell 1943-4-11 17904 Marin Black Canyon, San Rafael hills San Rafael Comment
  CAS-BOT-BC304647  Gutierrezia californica John Thomas Howell 1931-9-6 8042 San Benito 7 miles south of Paicines Comment
  UCD132609  Gutierrezia californica John Thomas Howell 1967-9-30 44017 Marin west side of Angel Island. Comment
  LA203632  Gutierrezia sarothrae John Thomas Howell; 1927-7-22 2816 Orange Santa Ana Canyon Comment
  CAS-BOT-BC182435  Hackelia John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54279 Plumas About 1.3 mi. southeast of summit of Mt. Hough on road to Quincy 2042 Comment
  CAS-BOT-BC282877  Hainardia cylindrica John Thomas Howell 1940-6-20 s.n. Marin Muir Beach to Stinson Beach Comment
  CDA3145  Halogeton glomeratus J. T. Howell, T. H. Kearney 1951-8-2 28229 Lassen Honey Lake Valley near Herlong. Comment
  JEPS58984  Hazardia whitneyi var. whitneyi John Thomas Howell 1962-9-23 38811 Kern near Tiger Flat; Sierra Nevada, Greenhorn Mountains 1981 Comment
  CAS-BOT-BC305313  Helianthella John Thomas Howell 1961-6-21 36657 Plumas Greenville 1097 Comment
  CAS-BOT-BC314768  Helianthella californica var. nevadensis John Thomas Howell 1924-6-5 378 Mariposa Wawona 1219 Comment
  CAS-BOT-BC224042  Helianthemum scoparium John Thomas Howell 1965-6-15 41341 Monterey Near the Monterey Airport on Salinas road about 4 miles east of Monterey Comment
  CAS-BOT-BC305398  Helianthus annuus John Thomas Howell 1973-11-1 50298 Kern Bank of Kern River, Hart Memorial Park near Bakersfield 146 Comment
  UCD132802  Helianthus annuus John Thomas Howell 1967-11-3 44055 Tulare in irrigated part at NE corner, about 4.5 miles ENE of Pixley. 83 Comment
  RSA215917  Helianthus annuus subsp. lenticularis J. T. Howell 1957-9-22 32969 San Francisco In waste ground, north base of Telegraph Hill, San Francscio. Comment
  POM179723  Hemizonia congesta J. T. Howell 1930-6-8 5216 Sonoma 8 miles west of Petaluma on Bodega Road. Comment
  CAS-BOT-BC309633  Hemizonia congesta subsp. lutescens John Thomas Howell 1966-4-6 41466 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC309834  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1926-11-28 1576 Napa American Canon [Canyon] between Napa highway and Cordelia Comment
  RSA22084  Hemizonia corymbosa subsp. corymbosa J. T. Howell 1939-9-3 15336 Marin Near Black Point. Comment
  RSA137096  Hemizonia luzulifolia J. T. Howell 1955-8-24 30900 Contra Costa Near Diablo County Club, south base of Mt. Diablo. Comment
  GH414562  Hemizonia plumosa J. T. Howell 1932-10-16 10839 Unknown 1.5 miles west of Tesla Comment
  CAS-BOT-BC388476  Herniaria John Thomas Howell; R. C. Barneby 1954-5-10 29335 Fresno Grade above Tollhouse 792 Comment
  CAS-BOT-BC388491  Herniaria hirsuta var. cinerea John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52810 Calaveras Camp Nine Road northeast of Vallecito 609 Comment
  CAS-BOT-BC310164  Hesperevax caulescens John Thomas Howell 1929-4-25 4191 Merced 5 miles ne. of Merced Comment
  CAS-BOT-BC310198  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1963-5-6 39129 Monterey Santa Lucia Mountains. 3 miles n. of Jolon 335 Comment
  CAS-BOT-BC403805  Hesperocnide tenella John Thomas Howell 1957-4-30 32148 San Benito Near entrance to the Pinnacles 289 Comment
  RSA54067  Hesperocnide tenella J. T. Howell 1949-7-4 25355 Santa Cruz Near Felton. Comment
  CAS-BOT-BC179184  Hesperolinon micranthum John Thomas Howell 1934-6-30 12258 Modoc Duncan Horse Camp. 1355 Comment
  POM273120  Hesperostipa comata subsp. comata J. T. Howell 1945-7-22 21330 Marin Clay slope and flat W of Mill Valley on road to Muir Woods Comment
  CAS-BOT-BC148449  Heteromeles arbutifolia John Thomas Howell 1957-5-28 32524 San Francisco Nw. side of Lone Mt. - San Francisco Comment
  CAS-BOT-BC310255  Heterotheca John Thomas Howell 1962-7-9 38361 Kern Kern River bottom just below Isabella Dam 762 Comment
  CAS-BOT-BC318883  Heterotheca grandiflora John Thomas Howell 1925-5-17 1064 Merced Hopeton Bridge on the Merced River Comment
  CAS-BOT-BC311053  Heterotheca oregona var. oregona John Thomas Howell 1936-8-29 12889 Humboldt Bluffs of Eel River, 11 miles n. of Garberville Comment
  CAS-BOT-BC311172  Heterotheca sessiliflora subsp. bolanderi John Thomas Howell 1939-7-2 14831 Marin Ridge between Tennessee Cove and Pirates Cove Comment
  CAS-BOT-BC311273  Heterotheca sessiliflora subsp. echioides John Thomas Howell 1933-8-17 11534 San Benito The Pinnacles Comment
  CAS-BOT-BC318975  Heterotheca sessiliflora var. echioides John Thomas Howell 1927-8-18 3013 Monterey Arroyo Seco River, Santa Lucia Camp, Santa Lucia Mountains 609 Comment
  CAS-BOT-BC310932  Heterotheca villosa var. minor John Thomas Howell 1960-3-26 35205 Kern Kern Canyon 3 miles south of Democrat Hot Springs Comment
  CAS-BOT-BC424374  Heuchera rubescens John Thomas Howell 1969-8-27 45996 Tulare Near Mineral King in Glacial Valley below White Chief Mine 2895 Comment
  CAS-BOT-BC425329  Heuchera rubescens John Thomas Howell 1940-8-4 15963 Tulare East Lake 2926 Comment
  CAS-BOT-BC319620  Hieracium albiflorum John Thomas Howell 1960-7-19 35709 Plumas Drakesbad, Lassen Volcanic National Park 1828 Comment
  CAS-BOT-BC280711  Holcus lanatus John Thomas Howell 1962-6-15 37483 Butte Magalia 731 Comment
  UC1598596  Holocarpha heermannii John Thomas Howell 1955-8-24 30901 Contra Costa near Diablo Country Club (s base of Mt. Diablo); Mt. Diablo Comment
  UC473573  Holocarpha heermannii John Thomas Howell 1931-10-11 8128 Mariposa Mariposa Comment
  CAS-BOT-BC325832  Holocarpha heermannii John Thomas Howell 1930-9-28 5499 Contra Costa 6.3 miles from Byron on teh Marsh Creek Road Comment
  CAS-BOT-BC324651  Holocarpha virgata John Thomas Howell 1933-8-27 11644 Napa EAst of Chiles Valley on road to Winters, Napa Range Comment
  CAS-BOT-BC324647  Holocarpha virgata John Thomas Howell 1929-7-21 4332 Merced Oakdale Road, 8 miles from Merced Comment
  CAS-BOT-BC149933  Holodiscus discolor var. discolor John Thomas Howell; Gordon H. True 1966-7-12 41816 Kern Just east of Fay Creek Canyon, Kern Plateau 2194 Comment
  CAS-BOT-BC149961  Holodiscus discolor var. discolor John Thomas Howell 1941-7-30 16503 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC152384  Holodiscus discolor var. discolor John Thomas Howell 1939-8-6 15106 Siskiyou Elk Mt., Marble Mts. Comment
  CAS-BOT-BC284605  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1944-5-28 s.n. Marin Almonte Comment
  CAS-BOT-BC284650  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1961-6-21 36694 Plumas Greenville 1097 Comment
  CAS-BOT-BC284666  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1956-6-5 31492 San Francisco North slope of Bayview Hills, San Francisco Comment
  CAS-BOT-BC285050  Hordeum depressum John Thomas Howell 1948-4-26 24278 Tulare Near Earlimart Comment
  UCR168504  Hordeum depressum J. T. Howell 1948-4-26 24278 Tulare Near Earlimart 88 Comment
  CAS-BOT-BC284697  Hordeum jubatum John Thomas Howell 1934-7-1 12348 Modoc Duncan Horse Camp Comment
  CAS-BOT-BC284728  Hordeum jubatum John Thomas Howell 1977-8-11 52697 Plumas At north end of Frenchmans Reservoir 1706 Comment
  CAS-BOT-BC289586  Hordeum marinum subsp. gussoneanum John Thomas Howell 1963-5-6 39193 Monterey Near Jolon, Santa Lucia Mts. Comment
  CAS-BOT-BC289385  Hordeum murinum subsp. glaucum John Thomas Howell 1956-5-19 21416 A San Francisco Third and Army Streets, San Francisco Comment
  RSA118033  Hordeum murinum subsp. glaucum J. T. Howell 1955-5-20 30211 Monterey Soledad Comment
  CAS-BOT-BC282031  Hordeum murinum subsp. leporinum John Thomas Howell 1932-3-13 8218 Ventura San Nicolas Island Comment
  CAS-BOT-BC273498  Hordeum vulgare John Thomas Howell 1949-7-16 25359 Tuolumne Dardanelle, Middle Fork Stanislaus River Comment
  CAS-BOT-BC536640  Horkelia californica John Thomas Howell 1930-6-22 5323 Marin Rodeo Lagoon Comment
  JEPS40662  Horkelia fusca subsp. tenella John Thomas Howell 1926-7-26 2128 Plumas near Prattville; Potentilla 1371 Comment
  CAS-BOT-BC143993  Horkelia fusca var. tenella John Thomas Howell 1926-7-26 2128 Plumas Near Prattville 1371 Comment
  CAS-BOT-BC158963  Horkeliella purpurascens John Thomas Howell; Gordon H. True 1969-9-29 46280 Tulare Upper Dry Lake, east of north end of Long Meadow - Kern Plateau, Sierra Nevada 2392 Comment
  CAS-BOT-BC201034  Hosackia crassifolia John Thomas Howell 1923-7-9 113 Mariposa Near Stella Lake, Wawona 1219 Comment
  CAS-BOT-BC201146  Hosackia crassifolia John Thomas Howell 1942-7-26 17218 Tulare Mineral King Comment
  CAS-BOT-BC312542  Hulsea heterochroma John Thomas Howell 1955-7-7 30521 Monterey Pinyon Peak, Santa Lucia Mts. Comment
  RSA526  Hydrocotyle umbellata J. T. Howell 1927-8-13 624 Orange Santa Ana River Bottom 152 Comment
  POM203152  Hydrocotyle verticillata J. T. Howell 1933-10-8 11712 Marin Pt. Reyes Peninsula Comment
  UCD128241  Hydrocotyle verticillata John Thomas Howell 1946-8-23 22898 Marin Olema Marshes. Comment
  CAS-BOT-BC312637  Hymenopappus filifolius var. lugens John Thomas Howell 1927-7-10 2740 San Bernardino East end of Big Bear Lake, San Bernardino Mts. 2042 Comment
  CAS-BOT-BC312821  Hymenoxys hoopesii John Thomas Howell; Gordon H. True 1970-6-23 46656 Tulare NE end of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC401302  Hypericum scouleri John Thomas Howell 1943-8-5 19069 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC312932  Hypochaeris glabra John Thomas Howell; Gordon H. True 1967-6-13 42592 Butte Oroville 51 Comment
  CAS-BOT-BC135726  Iris hartwegii John Thomas Howell 1962-6-17 37680 Plumas Butterfly Valley - Sierra Nevada 1036 Comment
  RSA684562  Isoetes bolanderi J. T. Howell 1947-8-6 23827 Inyo Fourth Lake, Big Pine Lakes 3293 Comment
  CAS-BOT-BC69932  Isoetes howellii John Thomas Howell; R. C. Barneby 1954-5-13 29527 Amador Plymouth. 274 Comment
  CAS-BOT-BC112393  Isolepis carinata John Thomas Howell 1927-5-8 2369 Marin Low place in grassland north of Lake Lagunitas Comment
  POM196451  Isolepis carinata J. T. Howell 1927-5-8 2369 Marin North of Lake Lagunitas. Comment
  RSA93  Isolepis cernua J. T. Howell 1927-7-6 277 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  JEPS42713  Isomeris arborea John Thomas Howell 1927-10-8 3134 Ventura Pt. Mugu Comment
  CAS-BOT-BC324804  Iva axillaris John Thomas Howell 1957-4-30 32116 Monterey San Lorenzo Creek 4.5 miles from King City 121 Comment
  CAS-BOT-BC137457  Ivesia campestris John Thomas Howell 1949-7-19 25496 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC139792  Ivesia gordonii John Thomas Howell 1943-7-20 18616 Nevada Castle Peak Comment
  NY833900  Ivesia kingii J. T. Howell 1938-8-8 14380 Mono Long Valley Comment
  UC618375  Ivesia lycopodioides subsp. lycopodioides John Thomas Howell 1938-8-11 14533 Tuolumne Mt. Dana 3352 Comment
  CAS-BOT-BC324889  Jensia yosemitana John Thomas Howell; R. C. Barneby 1954-5-10 29356 Fresno Near Alder Springs, Sierra Nevada 1402 Comment
  UC1106290  Juncus bufonius var. occidentalis John Thomas Howell 1941-7-6 16355 Marin Kent Trail Mt. Tamalpais Comment
  UC710546  Juncus drummondii John Thomas Howell 1944-8-6 20044 Tuolumne Dry Lake Comment
  CAS-BOT-BC127608  Juncus mertensianus John Thomas Howell 1940-8-4 15977 Tulare Ouzel Basin. 3200 Comment
  RSA38321  Juncus mexicanus J. T. Howell 1948-7-21 24808 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 2896 Comment
  UC710586  Juncus nevadensis John Thomas Howell 1944-8-14 20489 Tuolumne above Glen Aulin; Tuolumne Canyon Comment
  UCD142921  Juncus tenuis John Thomas Howell; Gordon H. True 1971-7-1 48322 Placer North limits of Lincoln. 48 Comment
  RSA95512  Juncus tenuis J. T. Howell 1951-6-27 27618 Plumas Jamison Creek 1829 Comment
  CAS-BOT-BC80973  Juniperus californica John Thomas Howell 1970-9-24 47382 Kern 0.5 mile s. of summit of Bodfish-Havilah road 1097 Comment
  CAS-BOT-BC85433  Juniperus californica John Thomas Howell 1970-9-25 47454 Kern Sierra Nevada - rock hillside about 2 miles south of Kernville 792 Comment
  UCD133674  Juniperus californica John Thomas Howell 1960-3-25 35163 Kern West side of Walker Pass. 1432 Comment
  CAS-BOT-BC81267  Juniperus occidentalis var. australis John Thomas Howell 1958-8-16 34473 Madera Near Isberg Lake 2987 Comment
  A362727  Kalmia microphylla J. T. Howell 1937-7-24 13410 Unknown Caribou Basin, Salmon-Trinity Alps 1981 Comment
  CAS-BOT-BC235777  Keckiella cordifolia John Thomas Howell 1927-6-5 2428 San Bernardino Aliso Canyon, s. Puente Hills 213 Comment
  CAS-BOT-BC236906  Keckiella corymbosa John Thomas Howell 1937-7-31 13704 Trinity 11 miles west of Big Bar Comment
  NY790281  Keckiella corymbosa J. T. Howell 1937-7-31 13704 Trinity Trinity River Canyon, 11 miles west of Big Bar Comment
  CAS-BOT-BC237849  Keckiella lemmonii John Thomas Howell 1929-8-4 4356 Napa One mile below Samuels Springs, Pope Creek Canon [Canyon], Napa Range Comment
  CAS-BOT-BC246164  Keckiella lemmonii John Thomas Howell 1976-7-14 51821 Plumas Feather River Canyon Highway at Injun Jim Campground, Sierra Nevada 609 Comment
  CAS-BOT-BC238255  Keckiella rothrockii John Thomas Howell 1948-7-31 25267 Inyo Onion Valley road 2590 Comment
  CAS-BOT-BC238284  Keckiella rothrockii John Thomas Howell 1950-7-17 26990 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  JEPS12486  Kelloggia galioides John Thomas Howell 1925-6-29 1258 El Dorado Emerald Bay Lake Tahoe (Armstrong's) 1889 Comment
  UCD85818  Koeleria macrantha John Thomas Howell; Gordon H. True 1971-7-14 48449 Tulare Kern Plateau. Manter Meadow. 2164 Comment
  UC1177282  Lactuca serriola John Thomas Howell 1939-11-5 Marin Manzanita Comment
  CAS-BOT-BC341499  Lagophylla ramosissima John Thomas Howell 1944-6-25 19656 Marin Santa Venetia Comment
  CAS-BOT-BC341714  Lagophylla ramosissima John Thomas Howell 1957-5-19 32330 Stanislaus Mt. Oso 1005 Comment
  CAS-BOT-BC347080  Lasthenia californica John Thomas Howell 1926-4-18 1894 Santa Clara Almaden Ridge Comment
  GH427305  Lasthenia macrantha subsp. bakeri J. T. Howell 1931-9-27 8099 Unknown 6 miles south of Point Arena Comment
  POM203867  Lasthenia macrantha subsp. bakeri J. T. Howell 1931-9-27 8099 Mendocino 6 miles south of Point Arena Comment
  CAS-BOT-BC366967  Lasthenia minor John Thomas Howell 1930-4-20 4733 Marin Pt Reyes Comment
  UCD106231  Lathyrus hirsutus John Thomas Howell 1966-6-2 41552 Napa Dry Creek Road near head of Dry Creek south west of Oakville. Comment
  CAS-BOT-BC204997  Lathyrus jepsonii var. californicus John Thomas Howell 1937-7-27 13593 Trinity Coffee Creek Canyon near Battle Creek Comment
  CAS-BOT-BC323210  Layia chrysanthemoides John Thomas Howell 1931-4-5 6181 Solano Blue Rock Springs near Vallejo Comment
  CAS-BOT-BC321793  Layia gaillardioides John Thomas Howell 1942-5-17 16960 Marin Ridge above the cascades of San Anselmo Creek Comment
  CAS-BOT-BC321464  Layia glandulosa John Thomas Howell; Gordon H. True 1969-5-13 45681 Kern Sierra Nevada. Spanish Needle Creek Road to Lamont Meadow 1463 Comment
  CAS-BOT-BC321087  Layia glandulosa John Thomas Howell 1958-5-23 33311 Inyo Whitney Portal road 1981 Comment
  CAS-BOT-BC321147  Layia glandulosa J. T. Howell; Gordon True 1971-6-16 s.n. Kern 5 mi E of Claraville Comment
  CAS-BOT-BC328231  Layia heterotricha John Thomas Howell 1931-3-18 5842 Fresno Oil Canyon Comment
  CAS-BOT-BC327177  Layia hieracioides John Thomas Howell 1957-6-2 32551 Monterey Near top of Jolon Grade Comment
  RSA896  Layia platyglossa subsp. campestris J. T. Howell 1928-2-25 844 Orange Between Nolina and Bee Canyon, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC329303  Layia septentrionalis John Thomas Howell 1940-5-19 15458 Napa Upper St. Helena Creek Comment
  UCD63584  Leersia oryzoides John Thomas Howell 1974-9-19 50873 Sutter 1.7 mi. south of Robbins on road to Knights Landing. 7 Comment
  CAS-BOT-BC534877  Lemna valdiviana J. T. Howell 1943-6-13 s.n. Marin Sausalito Comment
  CAS-BOT-BC221602  Lepechinia cardiophylla John Thomas Howell 1927-6-26 2606 Orange Claymine Canon [Canyon] n. Santa Ana Mts. 609 Comment
  RSA1076  Lepechinia cardiophylla J. T. Howell 1927-6-26 225 Orange Claymine Canyon, near Sierra Peak 610 Comment
  CAS-BOT-BC88989  Lepidium dictyotum John Thomas Howell 1962-7-9 38349 A Kern Sierra Nevada. Isabella. 762 Comment
  CAS-BOT-BC89085  Lepidium didymum John Thomas Howell 1939-11-5 s.n. Marin Sausalito. Comment
  CAS-BOT-BC89190  Lepidium draba John Thomas Howell 1930-3-28 4579 San Benito 2 miles south of Paicines. Comment
  UC1177252  Lepidium lasiocarpum var. lasiocarpum John Thomas Howell 1947-6-18 23277 Marin Dillons Beach Comment
  CAS-BOT-BC12526  Lepidium nitidum John Thomas Howell 1931-3-29 6018 San Benito 1.5 miles southeast of San Benito. Comment
  CAS-BOT-BC12673  Lepidium nitidum John Thomas Howell 1965-5-9 41304 Tulare About 4.5 miles east northeast of Pixley. 83 Comment
  CAS-BOT-BC12761  Lepidium oxycarpum John Thomas Howell 1930-4-4 4652 Alameda Bordering San Francisco Bay, 4 miles west of Decoto. Comment
  UCD115858  Lepidium pinnatifidum John Thomas Howell 1956-6-3 31465 San Francisco Embarcadero and Townsend St. Comment
  CAS-BOT-BC60034  Lepidium virginicum var. menziesii John Thomas Howell 1931-4-12 6296 Los Angeles Santa Cruz Island. At Cochie Bay. Comment
  RSA328  Lepidium virginicum var. pubescens J. T. Howell 1927-6-21 175 Orange Near ranch houses, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC328087  Lepidospartum squamatum John Thomas Howell 1963-5-7 39235 Monterey San Lorenzo Creek, 6 miles NE of King City 182 Comment
  CAS-BOT-BC329362  Lepidospartum squamatum John Thomas Howell 1973-10-31 50264 San Joaquin Wash of Hospital Creek SW of Vernalis at Interstate Hwy 580 Comment
  CAS-BOT-BC329438  Lepidospartum squamatum John Thomas Howell 1962-7-7 38167 Kern Kern River Canyon 396 Comment
  CAS-BOT-BC225629  Leptosiphon oblanceolatus John Thomas Howell 1950-7-19 27113 Tulare Pass north of Hessian Meadows, Sierra Nevada 2743 Comment
  CAS-BOT-BC225642  Leptosiphon oblanceolatus John Thomas Howell 1949-8-9 26160 Tulare Near Soldier Lake 3352 Comment
  CAS-BOT-BC225671  Leptosiphon serrulatus John Thomas Howell No date on label. s.n. Kern Hills near Glenville, Greenhorn Range 975 Comment
  GH403080  Leptosiphon serrulatus J. T. Howell 1930-5-15 5132 Unknown Hills near Glenville, Greenhorn Range 975 Comment
Read comments
Apr 9 2019
  CAS-BOT-BC324054  Lessingia arachnoidea John Thomas Howell 1927-5-10 2388 San Mateo Crystal Springs Lake 213 Comment
  RSA0001376  Lessingia germanorum var. tenuipes John T. Howell 1927-8-17 643 -A San Luis Obispo New Templeton. 244 Comment
  RSA0001377  Lessingia germanorum var. vallicola John T. Howell 1927-8-27 3065 San Joaquin Near Manteca. 15 Comment
  CAS-BOT-BC339357  Lessingia glandulifera var. glandulifera John Thomas Howell 1933-8-18 11570 Monterey 17 miles east of Jamesburg, Santa Lucia Mts. Comment
  CAS-BOT-BC339432  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-8-7 2981 San Diego In Pine Valley Comment
  CAS-BOT-BC339508  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-8-28 3068 Tulare Five miles below Three Rivers Comment
  CAS-BOT-BC339186  Lessingia glandulifera var. glandulifera John Thomas Howell; Gordon H. True 1971-6-14 47655 Fresno Kingsburg 91 Comment
  CAS-BOT-BC339481  Lessingia glandulifera var. glandulifera John Thomas Howell 1926-6-13 2011 Stanislaus On Stanislaus River at Knights Ferry Comment
  CAS-BOT-BC339537  Lessingia glandulifera var. peirsonii John Thomas Howell 1976-5-17 51657 Kern Pruett Bridge on Poso Creek, on road from Glennville to Granite Station. Greenhorn Mountains 762 Comment
  GH403553  Lessingia hololeuca J. T. Howell 1947-9-6 24178 Unknown Chileno Valley Comment
  SBBG27977  Lessingia hololeuca J. T. Howell 1945-9-16 Marin N of San Rafael and E of Santa Venetia Comment
  CAS-BOT-BC339620  Lessingia leptoclada John Thomas Howell 1940-8-10 16141 Fresno Zumwalt Meadows, Kings River Canyon Comment
  CAS-BOT-BC341813  Lessingia nemaclada John Thomas Howell 1950-8-27 27429 Fresno Auberry Comment
  CAS-BOT-BC341856  Lessingia nemaclada John Thomas Howell 1931-10-12 8159 Mariposa 3 miles from Coulterville on road to Jacksonville Comment
  JEPS59021  Lessingia nemaclada John Thomas Howell 1960-7-24 36003 Tehama 10 mi ne Red Bluff Comment
  UC421685  Lessingia pectinata var. tenuipes John Thomas Howell 1927-8-17 3011 Monterey 13 mi sw Jolon (on the Nacimiento River); Santa Lucia Mts., on the Nacimiento River Comment
  RSA118044  Lessingia tenuis John T. Howell 1955-7-8 30645 Monterey Santa Lucia Mountains; Hanging Valley 838 Comment
  CAS-BOT-BC342095  Leucanthemum vulgare John Thomas Howell 1949-7-4 25356 San Mateo On Skyline Blvd., north of Millbrae Comment
  CAS-BOT-BC229465  Lewisia disepala John Thomas Howell 1940-6-1 15573 Mariposa Between Snow Creek and Mt. Watkins ridge Comment
  CAS-BOT-BC444249  Lewisia pygmaea John Thomas Howell 1941-7-22 16395 Fresno Mono Pass 3505 Comment
  CAS-BOT-BC444351  Lewisia pygmaea John Thomas Howell 1942-8-7 17805 Tulare Columbine Lake Comment
  CAS-BOT-BC444563  Lewisia triphylla John Thomas Howell 1960-7-22 35920 Plumas Lassen Volcanic National Park. Devil's Kitchen to Drakesbad 1828 Comment
  CAS-BOT-BC272245  Leymus triticoides John Thomas Howell 1963-7-10 39679 Alpine Bog at Grover Hot Springs, Sierra Nevada 1798 Comment
  CAS-BOT-BC274532  Leymus triticoides John Thomas Howell 1955-7-19 30802 Plumas Vinton 1505 Comment
  CAS-BOT-BC272218  Leymus triticoides John Thomas Howell; Gordon H. True 1972-6-29 48928 Contra Costa Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC436037  Ligusticum grayi John Thomas Howell 1934-6-14 12150 Modoc Warner Mts., near Los Lake 2438 Comment
  CAS-BOT-BC509456  Lilium kelleyanum John Thomas Howell 1948-7-29 25186 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC45859  Limnanthes bakeri John Thomas Howell 1954-4-24 29148 Mendocino 1.5 miles north of Willits Comment
  JEPS30782  Linanthus bolanderi John Thomas Howell 1945-6-21 21204 Lake Bartlett Flat Comment
  UC750734  Linanthus bolanderi John Thomas Howell 1945-6-21 21204 Lake Bartlett Flat Comment
  CAS-BOT-BC226862  Linanthus californicus John Thomas Howell 1931-3-21 5928 Santa Barbara Cuyama Valley 35 miles east of Santa Maria Comment
  CAS-BOT-BC36111  Lithocarpus densiflorus var. densiflorus John Thomas Howell 1927-8-22 3036 Marin near West Point, Mt. Tamalpais 518 Comment
  CAS-BOT-BC435437  Lithophragma glabrum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-27 53104 Alpine East side of Ebbetts Pass on road to Markleeville; Sierra Nevada 2286 Comment
  CAS-BOT-BC435488  Lithophragma glabrum John Thomas Howell 1941-7-30 16518 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC435651  Lithophragma heterophyllum John Thomas Howell 1944-4-13 19372 Marin Big Rock Ridge west of Hamilton Field Comment
  CAS-BOT-BC428429  Lithophragma tenellum John Thomas Howell 1951-6-27 s.n. Plumas Jamison Creek 1828 Comment
  CAS-BOT-BC60202  Lobularia maritima John Thomas Howell 1957-5-17 32247 San Francisco San Francisco. Bayview Hills. Comment
  CAS-BOT-BC342162  Logfia filaginoides John Thomas Howell 1930-5-15 5128 Kern Hills near Glenville [Glennville], Greenhorn Range 975 Comment
  CAS-BOT-BC342210  Logfia filaginoides John Thomas Howell 1943-4-11 17899 Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC342427  Logfia gallica John Thomas Howell 1963-5-18 39315 Monterey 2.5 miles south of Aromas 60 Comment
  CAS-BOT-BC342498  Logfia gallica John Thomas Howell 1930-6-8 5236 Sonoma Bodega Road 3 miles east of Valley Ford Comment
  CAS-BOT-BC342456  Logfia gallica John Thomas Howell 1956-5-6 31363 San Francisco Sierra & Missouri Sts., San Francisco Comment
  CAS-BOT-BC283557  Lolium multiflorum John Thomas Howell 1938-5-28 13812 San Benito Near Hollister Comment
  CAS-BOT-BC283568  Lolium multiflorum John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54091 Yuba 3.6 miles NE of Strawberry Valley on La Porte - Quincy Road 1280 Comment
  UC1106115  Lolium perenne John Thomas Howell 1943-5-9 Marin San Raphael Comment
  CAS-BOT-BC271210  Lolium temulentum John Thomas Howell 1963-6-2 39383 Butte Along highway near Pulga, Sierra Nevada Comment
  UC421670  Lomatium dasycarpum subsp. dasycarpum John Thomas Howell 1930-4-20 4718 Marin 1 mi. e. Lagunitas Comment
  CAS-BOT-BC30168  Lomatium dissectum var. multifidum John Thomas Howell 1934-6-11 11941 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC30147  Lomatium macrocarpum John Thomas Howell 1934-6-11 11924 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC240515  Lonicera hispidula John Thomas Howell 1939-5-21 s.n. Marin S. Tiburon Comment
  CAS-BOT-BC240719  Lonicera interrupta John Thomas Howell; Gordon H. True 1971-6-15 47720 Kern 0.5 miles south of Bodfish Gap. On road to Havilah 1097 Comment
  CAS-BOT-BC240864  Lonicera interrupta John Thomas Howell; Gordon H. True 1966-7-13 41880 Tulare Canyon of Poison Meadow Creek on Cherry Hill Road. Kern Plateau 2011 Comment
  CAS-BOT-BC243906  Lonicera involucrata var. involucrata John Thomas Howell 1943-7-17 18489 Nevada Boreal Ridge, west side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC241469  Lonicera involucrata var. ledebourii John Thomas Howell 1926-3-19 1686 Alameda Strawberry Canyon, Berkeley Hills Comment
  CAS-BOT-BC342522  Lorandersonia peirsonii John Thomas Howell 1947-8-5 23737 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  RSA26268  Lotus nevadensis J. T. Howell 1940-7-28 15641 Fresno Near Sphinx Creek. Comment
  UCR88858  Lotus stipularis J. T. Howell 1954-5-19 29901 Mariposa Mount Bullion. 640 Comment
  UCD106705  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin Between Mill Valley and head of salt marshes. 3 Comment
  CAS-BOT-BC198391  Lupinus albifrons John Thomas Howell 1964-4-27 40517 Mariposa El Portal - Sierra Nevada 640 Comment
  GH366730  Lupinus albifrons var. douglasii J. T. Howell 1947-5-25 23196 Unknown Simmons Trail, Mt. Tamalpais Comment
  CAS-BOT-BC497327  Lupinus arbustus var. arbustus John Thomas Howell 1934-6-14 12120 Modoc Near Lost Lake, Warner Mts. 2438 Comment
  RSA203627  Lupinus bicolor subsp. tridentatus J. T. Howell 1933-5-14 11250 Contra Costa Hills east of St. Marys college Comment
  CAS-BOT-BC208860  Lupinus breweri var. breweri John Thomas Howell 1938-8-2 14011 Placer Sand dunes on Lake Tahoe at Brockway. Comment
  CAS-BOT-BC196772  Lupinus breweri var. bryoides John Thomas Howell 1950-7-17 27030 Tulare Templeton Meadows 2590 Comment
  CAS-BOT-BC215069  Lupinus chamissonis John Thomas Howell 1939-6-18 14779 Marin Near Mud Lake Comment
  CAS-BOT-BC205372  Lupinus elatus John Thomas Howell 1950-7-24 27304 Tulare Monache Creek, South Fork 3108 Comment
  RSA1021  Lupinus elatus J. T. Howell 1927-7-10 365 San Bernardino Big Bear, San Bernardino Mountains. 1829 Comment
  RSA595067  Lupinus formosus var. formosus J. T. Howell 1973-7-9 49715 Plumas Crescent Mills. 1067 Comment
  SEINET12885386 Image available Lupinus magnificus var. glarecola J. T. Howell 1928-1 3893 Unknown Comment
  CAS-BOT-BC8309  Lupinus ochroleucus John Thomas Howell 1941-6-1 16244 Mariposa about midway between Briceburg and Mariposa Comment
  SEINET12893026 Image available Lupinus polycarpus T. J. Howell 1880-1 Unknown Comment
  SEINET12894119 Image available Lupinus polyphyllus J. T. Howell 1938-1 14406 Unknown Comment
  JEPS33695  Lupinus stiversii John Thomas Howell 1923-6-7 32 Mariposa Wawona 1219 Comment
  CAS-BOT-BC436675  Luzula comosa var. laxa John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54098 Plumas Sierra Nevada: 10.6 miles NE of La Porte on road to Quincy 1889 Comment
  CAS-BOT-BC441232  Luzula macrantha John Thomas Howell 1924-5-23 346 Mariposa Wawona 1219 Comment
  UC421645  Luzula macrantha John Thomas Howell 1927-3-13 2285 Marin Point San Quentin Comment
  CAS-BOT-BC441253  Luzula macrantha John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1967-6-12 2087 Plumas Butterfly Botanical Area and vicinity: area near spring 1127 Comment
  CAS-BOT-BC231953  Luzula orestera John Thomas Howell 1944-8-6 20047 Tuolumne Dog Lake Comment
  CAS-BOT-BC236934  Luzula orestera John Thomas Howell 1942-8-1 17530 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  POM261502  Luzula orestera J. T. Howell 1940-8-1 15839 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC231462  Lycium barbarum John Thomas Howell 1934-9-23 12570 Solano Benecia Junction Comment
  RSA0015998  Lythrum hyssopifolia J. T. Howell 1930-6-8 5233 Sonoma 4 miles east of Valley Ford. Comment
  RSA118072  Madia anomala J. T. Howell 1955-5-29 30256 Marin Near Rock Spring on Laurel Dell Trail, Mt. Tamalpais Comment
  CAS-BOT-BC342645  Madia citrigracilis John Thomas Howell 1934-7-8 12494 Lassen Spalding's, Eagle Lake 1584 Comment
  CAS-BOT-BC344110  Madia elegans John Thomas Howell; Gordon H. True 1967-8-9 43645 Tulare Ca. 2.5 miles north of Blackrock Guard Station on Monache Jeep Trail, Kern Plateau 2682 Comment
  CAS-BOT-BC344114  Madia elegans John Thomas Howell 1950-7-19 27112 Tulare Pass north of Hessian Meadows 2743 Comment
  CAS-BOT-BC343782  Madia elegans John Thomas Howell 1961-9-25 36966 Plumas Vinton 1506 Comment
  CAS-BOT-BC343835  Madia elegans John Thomas Howell 1929-10-26 4534 Napa 1 mile nw. of Calistoga Comment
  CAS-BOT-BC344322  Madia exigua John Thomas Howell 1962-6-16 37609 Butte Feather River West Branch sw. of Nelson Bar 304 Comment
  CAS-BOT-BC342868  Madia glomerata John Thomas Howell 1951-8-20 28196 Plumas Indian Valley 1066 Comment
  CAS-BOT-BC49403  Madia glomerata John Thomas Howell 1934-7-3 12375 Modoc 5 mi. S of Hackamore. Comment
  CAS-BOT-BC342934  Madia gracilis John Thomas Howell 1933-5-28 11368 Alameda Strawberry Canyon, Berkeley Hills Comment
  CAS-BOT-BC343034  Madia gracilis John Thomas Howell 1962-7-10 38474 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC343086  Madia gracilis John Thomas Howell 1941-6-10 16289 Marin Black Point Comment
  CAS-BOT-BC343457  Madia gracilis John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53968 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC49377  Madia gracilis John Thomas Howell 1934-6-30 12268 Modoc Duncan Horse Camp. 1355 Comment
  UC517457  Madia gracilis John Thomas Howell 1933-5-14 11266 Contra Costa hills e St. Mary's College Comment
  UCR66732  Madia gracilis J. T. Howell 1934-6-12 12025 Modoc Warner mtns. Plum Valley 1660 Comment
  CAS-BOT-BC345074  Madia sativa John Thomas Howell 1957-5-22 32374 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC345092  Madia sativa John Thomas Howell 1964-6-29 40839 San Luis Obispo Near St. Paul's Episcopal Church, Cambria Comment
  CAS-BOT-BC345205  Madia sativa John Thomas Howell 1932-9-18 10781 Sonoma Lower Road to Glen Ellen 1 1/2 miles sw. of Kenwood Comment
  CAS-BOT-BC511481  Maianthemum racemosum subsp. amplexicaule John Thomas Howell 1923-5-25 20 Mariposa Wawona Valley 1219 Comment
  POM196475  Maianthemum racemosum subsp. amplexicaule J. T. Howell 1923-5-25 20 Mariposa Wawona Valley 1220 Comment
  CAS-BOT-BC204071  Malacothamnus fremontii John Thomas Howell; Thos. H. Kearney 1950-8-28 27432 Tulare Tule River Canyon 5 miles above Springville Comment
  GH420528  Malacothamnus fremontii J. T. Howell & G. H. True 1967-8-8 43500 Unknown Near north end of Lamont Meadow, Kern Plateau 1828 Comment
  CAS-BOT-BC204096  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa On North Road, Mt. Diablo 259 Comment
  UC1177006 Image available Malacothamnus palmeri John Thomas Howell 1955-7-8 30642 Monterey Arroyo Seco road 3 mi from Escondido Camp; Santa Lucia Mts. 792 Comment
  CAS-BOT-BC347442  Malacothrix floccifera John Thomas Howell; Gordon H. True 1973-8-1 50158 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC347653  Malacothrix glabrata John Thomas Howell 1962-5-21 37159 Kern Northeast of Lake Isabella 792 Comment
  RSA95029  Malacothrix saxatilis var. arachnoidea J. T. Howell 1933-8-18 11590 Monterey Carmel Valley, 10 miles east of Carmel Comment
  RSA517871  Malva nicaeensis J. T. Howell 1969-4-22 45547 Amador Fiddletown. 518 Comment
  UCD116599  Malva nicaeensis John Thomas Howell 1946-5-16 21900 San Francisco Van Ness Avenue at Fort Mason, San Francisco. Comment
  SEINET7248018  Malva pseudolavatera John Thomas Howell 1945-1 20913 A San Francisco Cf. Leafl. West. Bot. 1:173, Strybing Arboretum, Golden Gate Park. Comment
  CAS-BOT-BC71150  Marsilea oligospora John Thomas Howell 1937-7-21 13215 Trinity Big Flat Comment
  SEINET3816873  Matricaria discoidea John Thomas Howell 1965-4-27 41241 Merced 5 miles east of Los Banos, el. ca. 100 feet, Merced Comment
  SD72063  Matricaria occidentalis John Thomas Howell 1965-4-27 41241 Merced 5.0 miles east of Los Banos. 29 Comment
  CDA4231  Medicago praecox T. Howell 1954-5-2 29188 Tehama Near Red Bluff. 0 Comment
  CAS-BOT-BC269238  Melica aristata John Thomas Howell 1951-7-19 27948 Tulare Mineral King and vicinity. Monarch Lakes Trail 2438 Comment
  CAS-BOT-BC271147  Melica aristata John Thomas Howell 1962-7-8 38329 Kern 1.5 miles southeast of Summit, Greenhorn Mountains, Sierra Nevada 1524 Comment
  CAS-BOT-BC269384  Melica californica John Thomas Howell; H. Keith Wagnon 1980-5-26 53577 Butte Feather River Canyon Highway, 2.4 miles southwest of Pulga Bridge Comment
  CAS-BOT-BC280945  Melica imperfecta John Thomas Howell; Gordon H. True 1967-5-30 42459 Tulare About 1.5 miles from Lamont Meadow on road to Long Valley, Kern Plateau 1737 Comment
  CAS-BOT-BC281541  Melica imperfecta John Thomas Howell 1972-4-24 48693 Mariposa El Portal 640 Comment
  RSA299156  Melica imperfecta J. T. Howell 1958-5-22 33095 Tulare Kern River Canyon 6 miles S of Roads end PO 945 Comment
  CAS-BOT-BC281150  Melica stricta John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53828 Tulare Sherman Pass Rd W of the pass, Kern Plateau 2438 Comment
  CAS-BOT-BC281185  Melica stricta John Thomas Howell; Gordon H. True 1967-5-30 42462 Tulare About 1.5 miles from Lamont Meadow on road to Long Valley, Kern Plateau 1737 Comment
  RSA299154  Melica stricta J. T. Howell 1958-5-26 33413 Inyo Onion Valley road Comment
  UC1106142  Melica subulata John Thomas Howell 1945-6-3 20916 Marin near Inverness Comment
  CAS-BOT-BC262506  Melica torreyana John Thomas Howell 1933-5-14 11257 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC262539  Melica torreyana John Thomas Howell 1939-5-14 14678 Marin Near Collier Spring, Mt. Tamalpais Comment
  CAS-BOT-BC264237  Melica torreyana John Thomas Howell 1957-5-22 32375 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC170840  Mentzelia veatchiana John Thomas Howell 1960-6-6 35364 Fresno Kings Canyon 5.5 mi. w. of Cedar Grove - Sierra Nevada 1097 Comment
  CAS-BOT-BC428503  Micranthes aprica John Thomas Howell 1946-7-14 22299 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC428897  Micranthes californica John Thomas Howell 1930-3-29 4614 San Benito The Pinnacles Comment
  CAS-BOT-BC429096  Micranthes odontoloma John Thomas Howell 1960-8-19 36128 Tehama Lassen Volcanic National Park. Brokeoff Mt. Trail 2346 Comment
  CAS-BOT-BC429251  Micranthes oregana John Thomas Howell 1951-8-21 28267 Sierra Yuba Pass 2042 Comment
  CAS-BOT-BC429182  Micranthes oregana John Thomas Howell 1949-8-12 26249 Inyo Cottonwood Creek 3108 Comment
  CAS-BOT-BC348631  Micropus californicus var. californicus John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53960 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  POM193957  Microseris bigelovii J. T. Howell 1929-5-26 4243 Mendocino Mendocino coastal plain, Fort Bragg Comment
  CAS-BOT-BC348827  Microseris campestris John Thomas Howell 1948-4-26 24274 Tulare Flats near Earlimart Comment
  CAS-BOT-BC348938  Microseris douglasii subsp. douglasii John Thomas Howell 1946-5-14 21837 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC348943  Microseris douglasii subsp. douglasii J. T. Howell 1943-5-22 s.n. Marin Lagunitas Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC349090  Microseris douglasii subsp. tenella John Thomas Howell 1935-4-11 12591 Alameda Tesla Hills Comment
  CAS-BOT-BC349215  Microseris elegans John Thomas Howell 1963-6-22 39545 Monterey Priest Valley 685 Comment
  UCD134528  Microseris elegans John Thomas Howell 1967-4-30 42138 Tulare from N1/3 of vernal pool natural area, 4.5 miles ENE of Pixley. 83 Comment
  CAS-BOT-BC322710  Microseris laciniata John Thomas Howell; Alice Eastwood 1938-7-6 6086 Sonoma Alder Glen Springs Comment
  CAS-BOT-BC349379  Microseris nutans John Thomas Howell 1937-7-22 13266 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC322731  Microseris paludosa John Thomas Howell 1944-5-14 19457 Marin Hills near Salmon Creek School Comment
  CAS-BOT-BC197895  Microsteris gracilis John Thomas Howell 1934-6-12 12023 Modoc Plum Valley. Comment
  CAS-BOT-BC9707  Mimulus barbatus John Thomas Howell; Gordon H. True 1970-7-29 47127 Tulare Pine Flat, Kern Plateau 2194 Comment
  CAS-BOT-BC154258  Mimulus nanus var. mephiticus John Thomas Howell 1950-7-17 27020 Tulare Templeton Meadows 2590 Comment
  CAS-BOT-BC9800  Mimulus palmeri John Thomas Howell; Gordon H. True 1971-6-17 48072 Kern 3.5 miles east of Bodfish Gap. 1676 Comment
  CAS-BOT-BC11030  Mimulus suksdorfii John Thomas Howell 1963-7-10 39739 Alpine Sagebrush Flat, 0.5 mile west of Monitor Pass. 2529 Comment
  CAS-BOT-BC174537  Minuartia californica John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52952 Calaveras Glencoe 822 Comment
  CAS-BOT-BC174629  Minuartia californica John Thomas Howell 1967-4-30 42127 Tulare About 4 1/2 miles east-northeast of Pixley. From N 1/3 of area 83 Comment
  CAS-BOT-BC388611  Minuartia douglasii John Thomas Howell 1967-6-22 42616 Butte Magalia 701 Comment
  CAS-BOT-BC388686  Minuartia douglasii John Thomas Howell 1924-5-25 350 Mariposa Near Fish Hatchery, Wawona 1219 Comment
  CAS-BOT-BC388918  Minuartia douglasii John Thomas Howell; Gordon H. True 1968-5-14 44379 Tulare Cherry Hill Road at Rincon Trail, Brush Creek Canyon. Kern Plateau 1463 Comment
  CAS-BOT-BC174720  Minuartia nuttallii John Thomas Howell 1946-7-15 22403 Inyo Ruby Lake, Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC181577  Minuartia nuttallii var. gracilis John Thomas Howell 1941-8-8 16871 Mono San Joaquin Mt. Comment
  CAS-BOT-BC181602  Minuartia nuttallii var. gracilis John Thomas Howell 1958-8-1 34157 Fresno Ridge north of Dougherty Meadow - Sierra Nevada 3048 Comment
  UC1035443  Minuartia rosei J. T. Howell 1955-6-13 30370 Trinity Peanut; ; Peanut, Trinity Co. 762 Comment
  CAS-BOT-BC181170  Minuartia rubella John Thomas Howell 1944-8-15 20569 Tuolumne Mt. Conness 3657 Comment
  RSA275  Mirabilis laevis var. villosa J. T. Howell 1927-6-11 95 San Bernardino Between Cajon Pass and Hesperia 1067 Comment
  CAS-BOT-BC435066  Mollugo verticillata John Thomas Howell 1959-9-20 34635 Butte Eastern outskirts of Oroville 60 Comment
  RSA263810  Mollugo verticillata J. T. Howell 1970-9-22 47459 Kern Lake Isabella (east side of north arm). 793 Comment
  CAS-BOT-BC219946  Monardella breweri subsp. lanceolata John Thomas Howell 1962-6-16 37611 Butte Feather River West Branch sw. of Nelson Bar 304 Comment
  CAS-BOT-BC219970  Monardella breweri subsp. lanceolata John Thomas Howell 1958-7-19 33667 Fresno Cedar Grove 1402 Comment
  CAS-BOT-BC220151  Monardella exilis John Thomas Howell; Gordon H. True 1967-7-3 42760 Tulare Between Chimney and Lamont Meadows, Kern Plateau 1981 Comment
  SD149152  Monardella linoides subsp. anemonoides John Thomas Howell 1971-6-17 48040 Kern Sierra Nevada, one mi. E of Bodfish Gap 1310 Comment
  CAS-BOT-BC221782  Monardella odoratissima John Thomas Howell 1934-7-9 12525 Lassen Pine Creek Flat Comment
  CAS-BOT-BC221995  Monardella odoratissima subsp. glauca John Thomas Howell 1947-8-5 23798 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC222043  Monardella odoratissima subsp. glauca John Thomas Howell 1950-7-24 27327 Tulare East of Hessian Meadows 2895 Comment
  RSA401649B  Monardella odoratissima subsp. pallida J. T. Howell 1948-7-31 25244 Inyo Kearsarge Pass Trail. 2896 Comment
  SEINET892714  Monardella odoratissima subsp. pallida John Thomas Howell 1945-1 21164 Lake Sawmill Flat to Ruppert Ridge, Barlett Mountain, Lake County Comment
  CAS-BOT-BC222202  Monardella odoratissima subsp. pallida John Thomas Howell; Gordon H. True 1970-7-29 47069 Tulare 1 mile from Long Meadow on road to Cannell Meadow. Kern Plateau 2346 Comment
  CAS-BOT-BC220219  Monardella sheltonii John Thomas Howell 1923-7-25 152 Mariposa At entrance of Yosemite Park on the Wawona Road Comment
  CAS-BOT-BC220162  Monardella sinuata subsp. nigrescens John Thomas Howell 1933-7-9 11431 San Francisco Lake Merced, San Francisco Comment
  CAS-BOT-BC220544  Monardella villosa John Thomas Howell 1939-7-2 14836 Marin Between Pirates Cove and Big Lagoon Comment
  CAS-BOT-BC349430  Monolopia lanceolata John Thomas Howell 1931-3-17 5797 Fresno 14 miles east of Coalinga Comment
  CAS-BOT-BC444615  Montia chamissoi John Thomas Howell 1941-7-31 16544 Madera Agnew Pass Trail Comment
  CAS-BOT-BC444777  Montia chamissoi John Thomas Howell 1950-7-15 26911 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC444733  Montia chamissoi John Thomas Howell 1938-8-2 13993 Placer 5 miles n. of Brockway Comment
  CAS-BOT-BC444834  Montia fontana John Thomas Howell 1949-7-25 25724 Tulare Siberian Pass Creek 3352 Comment
  CAS-BOT-BC445077  Montia linearis John Thomas Howell; Gordon H. True 1970-5-28 5371 Nevada Bear Valley on Highway 20, ca. 20 mi. E. of Nevada City. 1402 Comment
  CAS-BOT-BC262635  Muhlenbergia asperifolia John Thomas Howell 1973-7-10 49801 Lassen Hwy. 395, 4 miles north of Doyle Comment
  CAS-BOT-BC264550  Muhlenbergia filiformis John Thomas Howell; Gordon H. True 1966-7-11 41630 Tulare Poison Meadow, Kern Plateau Comment
  CAS-BOT-BC264559  Muhlenbergia filiformis John Thomas Howell 1950-7-15 26916 Tulare Bakeoven Meadows, S Fork of Kern River 2468 Comment
  SEINET7294631 Image available Muhlenbergia mexicana var. filiformis John Thomas Howell 1961-1 26716 Butte Bank of Feather River, Oroville 53 Comment
  CAS-BOT-BC275195  Muhlenbergia montana John Thomas Howell 1949-7-23 25646 Tulare Soldier Lake 3352 Comment
  CAS-BOT-BC274958  Muhlenbergia richardsonis John Thomas Howell 1944-8-7 20053 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC275003  Muhlenbergia richardsonis John Thomas Howell 1949-7-29 25890 Tulare Little Whitney Meadow 2590 Comment
  CAS-BOT-BC275047  Muhlenbergia richardsonis John Thomas Howell; Gordon H. True 1970-7-29 47144 Tulare End of Cannell Meadow road ca. 1 mile W of ranger station, Kern Plateau 2286 Comment
  CAS-BOT-BC83327  Myosurus minimus John Thomas Howell 1929-4-27 4209 Merced 3 miles northwest of Merced on Oakdale Road. 51 Comment
  UCD96306  Myosurus minimus John Thomas Howell 1971-3-23 47585 Merced northeast of Gustine on road to Merced. 30 Comment
  CAS-BOT-BC259807  Nassella cernua John Thomas Howell 1963-5-6 39162 Monterey Santa Lucia Mountains. Jolon 298 Comment
  UCD87433  Nassella cernua John Thomas Howell; Gordon H. True 1968-5-12 44193 Kern .Bodfish. 762 Comment
  CAS-BOT-BC259969  Nassella lepida John Thomas Howell 1927-6-9 2464 Orange N side of Santa Ana Canon [Santa Ana Canyon] 152 Comment
  UC618430  Navarretia atractyloides John Thomas Howell 1937-6-18 13113 Lake 2 mi n Lower Lake Comment
  RSA26220  Navarretia divaricata J. T. Howell 1937-7-27 13572 Siskiyou Salmon River near Big Flat 1524 Comment
  UC908379  Navarretia divaricata J. T. Howell 1926-6-26 2124 Plumas 1 mi s Prattville; Lake Almanor Comment
  POM180787  Navarretia divaricata subsp. vividior J. T. Howell 1930-7-13 5347 Napa On the edge of the Crater Country Comment
  RSA580  Navarretia hamata J. T. Howell 1927-8-7 605 San Diego Near Dulzura Ranch. 335 Comment
  JEPS15003  Navarretia heterodoxa John Thomas Howell 1937-7-4 13056 Napa Wooden Valley Grade Comment
  UC856844  Navarretia nigelliformis subsp. radians John Thomas Howell 1937-5-20 12962 San Benito 12 mi s Paicines; San Benito Co. Comment
  RSA0004854  Navarretia nigelliformis var. radians J. T. Howell 1937-5-20 12962 San Benito 12 miles south of Paicines. Comment
  CAS-BOT-BC233567  Navarretia prostrata John Thomas Howell 1965-4-27 41237 Merced 5 miles E of Los Banos [Banos] 30 Comment
  POM180640  Navarretia squarrosa J. T. Howell 1930-7-20 5379 Marin Hills just north of Pheonix Lake. Comment
  CAS-BOT-BC232736  Navarretia subuligera John Thomas Howell 1940-5-19 15462 Napa Upper St. Helena Creek Comment
  UC856900  Navarretia viscidula John Thomas Howell 1937-7-4 13082 Sonoma 5 mi n Sebastopol Comment
  SEINET10464831  Nemacladus capillaris John Thomas Howell 1954-6-6 Howell 29975 Tuolumne 1128 Comment
  CAS-BOT-BC219364  Nemophila John Thomas Howell 1976-4-1 51524 Butte Table Mountain, 4 to 5 miles north of Oroville 152 Comment
  POM204479  Nemophila heterophylla J. T. Howell 1933-5-14 11218 Contra Costa Hills east of St. Mary s college Comment
  RSA616  Nemophila menziesii J. T. Howell 1928-3-18 889 Orange Rancho Santa Ana, Botanic Garden. 152 Comment
  JEPS1518  Nemophila menziesii var. integrifolia John Thomas Howell 1928-5-4 3770 Los Angeles Monrovia Canyon , Monrovia Canyon (San Gabriel Mts.) Comment
  CAS-BOT-BC219417  Nemophila parviflora John Thomas Howell 1945-6-18 21001 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC179298  Nemophila parviflora var. austiniae John Thomas Howell 1934-6-13 12054 Modoc Fandango Pass. 1828 Comment
  CAS-BOT-BC230554  Nemophila parviflora var. austiniae J. T. Howell; et al. 1967-6-12 2076 Plumas Butterfly Botanical Area and Vicinity. Near spring 1127 Comment
  CAS-BOT-BC230585  Nemophila parviflora var. quercifolia John Thomas Howell 1930-5-14 5085 Kern Greenhorn Range 1600 Comment
  GH356869  Notholithocarpus densiflorus J. T. Howell 1947-5-25 23206 Unknown Berry Trail, Mt. Tamalpais Comment
  PGM1177  Nuttallanthus texanus J. T. Howell 1969-4-17 Monterey Northern Monterey County, Marina, Slopes of maritime dune hills Comment
  CAS-BOT-BC7136  Oenothera heterochroma var. monoensis John Thomas Howell 1947-8-16 24172 Mono Sherwin Grade north of Bishop 1676 Comment
  SEINET12564281  Oenothera rosea John Thomas Howell 1958-1 33024 San Francisco On Greenich St. between Polk & Larkin Streets. Russian Hill. Comment
  CAS-BOT-BC58095  Opuntia basilaris var. basilaris John Thomas Howell 1962-7-7 38178 Kern Field redacted by CAS, contact the data manager for more information 731 Comment
  RSA28224  Oreobolopsis clementis J. T. Howell 1951-7-21 28080 Tulare White Chief region; Mineral King and vicinity. 3049 Comment
  CAS-BOT-BC350030  Oreostemma alpigenum var. andersonii John Thomas Howell 1947-8-5 23738 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC499891  Orobanche fasciculata John Thomas Howell 1930-5-13 5047 Kern Kern Canyon, 7 mi above Kernville 844 Comment
  CAS-BOT-BC499914  Orobanche fasciculata John Thomas Howell 1965-4-26 41218 Madera Sierra Nevada: 4.7 mi S of Northfork 609 Comment
  JEPS28854  Orobanche fasciculata John Thomas Howell 1962-7-8 38229 Kern Sierra Nevada. Black Mt. south side Greenhorn Mountains. Comment
  CAS-BOT-BC500248  Orobanche uniflora subsp. occidentalis John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52771 Calaveras Sierra Nevada: Camp Nine Road NE of Vallecito 609 Comment
  CAS-BOT-BC15749  Osmorhiza occidentalis John Thomas Howell 1934-6-11 11948 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC413337  Oxytheca perfoliata John Thomas Howell 1957-6-24 32730 Kern 4 miles n. of Mojave 914 Comment
  UC421648  Oxytheca trilobata John Thomas Howell 1927-8-2 2920 Riverside near Idyllwild; Mt. San Jacinto 1676 Comment
  CAS-BOT-BC202202  Oxytropis oreophila John Thomas Howell 1947-7-25 23668 San Bernardino Mt. San Gorgonio, San Bernardino Mts. 3505 Comment
  CAS-BOT-BC316782  Packera cana John Thomas Howell 1950-7-21 27157 Tulare Monache Mt. 2590 Comment
  CAS-BOT-BC50307  Packera cana John Thomas Howell 1934-6-12 12015 Modoc Between Davis Creek and Plum Valley. Comment
  RSA302  Paeonia californica J. T. Howell 1928-2-6 809 Orange Claymine Canyon, Sierra Peak, Santa Ana Mts. 244 Comment
  GH355604  Panicum capillare var. occidentale J. T. Howell 1937-7-21 13219 Unknown Big Flat, Trinity County Comment
  CAS-BOT-BC253813  Panicum dichotomiflorum John Thomas Howell 1959-9-26 35065 Plumas Near Virgilia 838 Comment
  CAS-BOT-BC253835  Panicum dichotomiflorum John Thomas Howell 1988-9-15 s.n. Marin Nicasio Reservoir Comment
  CAS-BOT-BC253864  Panicum miliaceum John Thomas Howell 1957-6-25 32764 Kern Tehachapi Mountains, 2.5 miles SE of Keene 914 Comment
  SEINET195364  Papaver californicum John Thomas Howell 1946-5-30 21962 Marin Little Carson Canyon. Comment
  CAS-BOT-BC274145  Pappostipa speciosa John Thomas Howell; Gordon H. True 1971-6-17 48021 Kern 0.5 mile east of Bodfish Gap 1219 Comment
  UC750600  Parapholis incurva John Thomas Howell 1945-5-6 20816 Marin San Rafael Comment
  RSA0034598  Parapholis incurva J. T. Howell 1945-5-6 20816 Marin San Rafael. Comment
  UC565378  Parvisedum pentandrum John Thomas Howell 1937-5-19 12939 San Benito The Pinnacles Comment
  UC421688  Parvisedum pumilum John Thomas Howell 1930-4-13 4705 Calaveras Sierra Foothills 4.7 mi w of San Andreas; Sierra Foothills Comment
  CAS-BOT-BC265632  Paspalum distichum John Thomas Howell 1945-6-22 21221 Lake Clear Lake Oaks Comment
  CAS-BOT-BC69312  Pellaea andromedifolia John Thomas Howell 1962-5-22 37260 Tulare Kern River Canyon above Roads End 1097 Comment
  CAS-BOT-BC67737  Pellaea andromedifolia John Thomas Howell; Gordon H. True 1969-9-28 46237 Kern Sierra Nevada - 1 mile northeast of mouth of Kern River Canyon 259 Comment
  CAS-BOT-BC67626  Pellaea breweri John Thomas Howell 1949-7-24 25700 Tulare Primrose Lake 3505 Comment
  CAS-BOT-BC71225  Pellaea bridgesii John Thomas Howell 1925-7-2 1321 C El Dorado Trail to Desolation Valley above Glen Alpine, Lake Tahoe region Comment
  CAS-BOT-BC71239  Pellaea bridgesii John Thomas Howell 1951-6-28 27694 Plumas Eureka Peak 2133 Comment
  CAS-BOT-BC258782  Pennisetum clandestinum J. T. Howell 1956-7-11 s.n. Alameda Lawn below Agricultural Hall, Univ. of California, Berkeley Comment
  CAS-BOT-BC265302  Penstemon davidsonii var. davidsonii John Thomas Howell 1941-8-3 16712 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC265331  Penstemon davidsonii var. davidsonii Thomas Howell 1946-7-20 22589 Fresno Ridge S of Mono Rock 3596 Comment
  UC750557  Penstemon davidsonii var. davidsonii John Thomas Howell 1946-7-16 22459 Inyo Rock Creek Lake Basin, W side of Morgan Pass Comment
  RSA299497  Penstemon grinnellii var. scrophularioides J. T. Howell, Gordon H. True Jr. 1967-7-3 42772 Tulare Between Chimney and Lamont Meadows. Kern Plateau. 1951 Comment
  CAS-BOT-BC264474  Penstemon heterodoxus var. heterodoxus John Thomas Howell 1943-7-20 18617 Nevada Castle Peak Comment
  CAS-BOT-BC245654  Penstemon incertus John Thomas Howell; Gordon H. True 1971-6-16 47904 Kern Along Kelso Creek, 15 miles south of Weldon on road to Kelso Valley, Sierra Nevada 1219 Comment
  RSA736  Penstemon labrosus J. T. Howell 1927-7-10 360 -A San Bernardino Big Bear, San Bernardino Mountains. 1829 Comment
  CAS-BOT-BC239195  Penstemon newberryi var. berryi John Thomas Howell 1941-7-30 16477 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC239224  Penstemon newberryi var. berryi John Thomas Howell 1923-5-27 26 Mariposa Top of Chilnualna Fall, Yosemite Park 2133 Comment
  CAS-BOT-BC239258  Penstemon newberryi var. berryi John Thomas Howell 1944-8-14 s.n. Tuolumne Tuolumne Canyon above Glen Aulin Comment
  CAS-BOT-BC239360  Penstemon newberryi var. berryi John Thomas Howell; Gordon H. True 1970-6-23 46614 Tulare Cherry Hill Road 2 miles above Rincon Trail intersection, Brush Creek Canyon, Kern Plateau 1676 Comment
  CAS-BOT-BC239666  Penstemon sudans John Thomas Howell 1974-7-9 50479 Lassen Between Susanville and SW end of Eagle Lake 1828 Comment
  CAS-BOT-BC327989  Pentachaeta alsinoides John Thomas Howell 1953-6-15 29089 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  GH414098  Pentachaeta bellidiflora J. T. Howell 1946-5-25 21933 Unknown Greenbrae Hills Comment
  CAS-BOT-BC218403  Perideridia pringlei John Thomas Howell; Gordon H. True 1971-6-15 47721 Kern 0.5 miles south of Bodfish Gap on road to Havilah, Sierra Nevada 1097 Comment
  CAS-BOT-BC418891  Persicaria hydropiperoides John Thomas Howell 1929-9-21 4418 San Joaquin Holt Comment
  CAS-BOT-BC413787  Persicaria lapathifolia John Thomas Howell 1956-10-28 31928 San Francisco San Francisco. Mountain Lake, Presidio Comment
  CAS-BOT-BC419290  Persicaria pensylvanica John Thomas Howell 1932-9-18 10778 Sonoma Bank of slough draining Kenwood Marsh Comment
  CAS-BOT-BC419354  Persicaria punctata John Thomas Howell 1963-6-21 39443 Monterey Along Highway US 101, Prunedale Comment
  RSA690  Petunia parviflora J. T. Howell 1927-6-30 247 Orange Bryant Ranch, near Long Beach. 15 Comment
  RSA88075  Phacelia austromontana J. T. Howell 1951-7-20 27982 Tulare Franklin Pass Trail. 2530 Comment
  SBBG41212  Phacelia californica J. T. Howell 1938-6-5 13894 Marin between Fern Cyn and Azalea Flat, Mt Tamalpais Comment
  CAS-BOT-BC142695  Phacelia ciliata var. opaca John Thomas Howell 1929-4-1 4117 Merced Clay hills, 5 miles ne. of Merced Comment
  RSA88080  Phacelia corymbosa J. T. Howell 1951-6-26 27522 Butte Near Pulga. 366 Comment
  RSA606  Phacelia distans J. T. Howell 1928-3-18 892 Orange Rancho Santa Ana, Botanic Garden. 152 Comment
  UC702991  Phacelia distans John Thomas Howell 1928-6-10 3882 Los Angeles Deer Park San Gabriel Mts., Monrovia Canyon Comment
  POM299002  Phacelia divaricata J. T. Howell 1933-4-23 11171 San Benito Near Hernandez. Comment
  POM399066  Phacelia divaricata var. congdonii J. T. Howell 1930-5-14 5101 Kern West slope of Greenhorn Range on road from Kernville to Glenville 1372 Comment
  SBBG41124  Phacelia hastata J. T. Howell 1963-8-22 40271 Mono 2.5 mi S of Crestview Comment
  SBBG41126  Phacelia hastata J. T. Howell 1934-6-16 12217 Modoc 2 mi NE of Canby Comment
  CAS-BOT-BC145042  Phacelia keckii John Thomas Howell 1931-5-30 6611 Riverside Santiago Peak, Santa Ana Mts. 1219 Comment
  CAS-BOT-BC145067  Phacelia mohavensis John Thomas Howell; Gordon H. True 1966-7-12 41487 Kern At spring in Bartolas Country, easterly from Cane Meadow 2194 Comment
  RSA624  Phacelia mutabilis J. T. Howell 1927-8-29 718 Tulare Cahoon Meadow, Sequoia National Park. 2500 Comment
  RSA88078  Phacelia mutabilis J. T. Howell 1951-7-20 27981 Tulare Near Mineral King. 2409 Comment
  CDA40398  Phacelia nashiana J. T. Howell, Gordon H. True 1973-4-6 49138 Kern Sierra Nevada; Southern Sierra Nevada; Sand Canyon. 0 Comment
  POM299085  Phacelia orogenes J. T. Howell 1942-7-25 s.n. Tulare Eagle Lake Trail near Mineral King Comment
  SEINET4852894  Phacelia peirsoniana John Thomas Howell 1938-8-7 14353 Mono Near Little Round Valley. Comment
  RSA78608  Phacelia racemosa J. T. Howell 1943-7-14 18288 Nevada West side of Donner Pass near Norden. 2134 Comment
  RSA632  Phacelia ramosissima var. austrolitoralis J. T. Howell 1927-6-3 21 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC154417  Phacelia ramosissima var. latifolia John Thomas Howell 1949-7-17 25400 Inyo Wonoga Peak 2743 Comment
  CAS-BOT-BC159015  Phacelia ramosissima var. latifolia John Thomas Howell; Gordon H. True 1970-6-26 46873 Tulare Taylor Meadow, Kern Plateau 2194 Comment
  POM299071  Phacelia ramosissima var. ramosissima J. T. Howell 1933-8-19 11617 Santa Cruz Mt. Hermon. Santa Cruz Mountains. Comment
  CAS-BOT-BC356075  Phalacroseris bolanderi John Thomas Howell 1924-7-28 555 Mariposa Buck Camp Trail between Johnson Lake and Chilnualna Creek, Yosemite Park Comment
  SEINET195299 Image available Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Tiburon Comment
  UCD88139  Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Tiburon. Comment
  CAS-BOT-BC265854  Phalaris californica John Thomas Howell 1940-5-19 15444 Napa Near Calistoga Comment
  CAS-BOT-BC259068  Phalaris lemmonii John Thomas Howell 1944-5-7 19426 Marin Greenbrae Comment
  CAS-BOT-BC250618  Phalaris minor John Thomas Howell 1960-3-24 35152 Riverside La Quinta Comment
  RSA118063  Phalaris minor J. T. Howell 1955-5-20 30208 Monterey Soledad Comment
  SBBG115738  Phalaris minor J. T. Howell, G. H. True 1974-3-3 50330 Yolo ca. 7 mi N of Madison Comment
  UC1177483  Phalaris minor John Thomas Howell 1944-5-28 19511 Marin between Manzanita and Almonte Comment
  CAS-BOT-BC253552  Phleum alpinum John Thomas Howell 1946-6-13 22052 Marin East of Dillons Beach Comment
  CAS-BOT-BC232803  Phlox dispersa John Thomas Howell 1949-7-18 25475 Tulare Army Pass 3627 Comment
  CAS-BOT-BC171142  Phoradendron serotinum subsp. tomentosum John Thomas Howell; Gordon H. True 1965-7-14 2221 Nevada Washington Rd. 1 1/2 mi N of Highway 20 (Wash. Jct.) 12 mi E of Nevada City 1280 Comment
  CAS-BOT-BC56437  Phyllodoce breweri John Thomas Howell 1925-6-28 1237 El Dorado Trail between Eagle Lake and Velma Lakes, Lake Tahoe region Comment
  CAS-BOT-BC58180  Phyllodoce breweri John Thomas Howell 1944-8-15 20526 Tuolumne Mt. Conness. 3352 Comment
  CAS-BOT-BC58248  Phyllodoce breweri John Thomas Howell 1951-7-20 28031 Tulare Mineral King and Vicinity. Near town e. of Farewell Gap. 3352 Comment
  CAS-BOT-BC78176  Picea breweriana John Thomas Howell 1937-7-24 13413 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  GH339987  Picea breweriana T. J. Howell 1884-6-17 270 Unknown Siskiyou Mountains at the head of the Illinois River Comment
  UC813170  Picea breweriana John Thomas Howell Siskiyou Caribou Basin Comment
  CAS-BOT-BC76932  Pilularia americana John Thomas Howell 1930-5-21 5195 Santa Clara 1 mile south of Morgan Hill Comment
  CAS-BOT-BC78210  Pinus albicaulis John Thomas Howell 1960-8-19 36189 Tehama Summit ridge, Brokoff Mt. 2804 Comment
  CAS-BOT-BC73365  Pinus attenuata John Thomas Howell 1955-5-19 30190 Monterey Along ridge between Reliz and Bear Canyons, Santa Lucia Mts. 1158 Comment
  CAS-BOT-BC73322  Pinus balfouriana John Thomas Howell 1940-8-8 16061 Tulare Between Relection Lake and Harrison Pass. Comment
  CAS-BOT-BC78353  Pinus balfouriana John Thomas Howell 1969-8-25 45906 Tulare Mineral King, just s. of pack station 2377 Comment
  CAS-BOT-BC73213  Pinus flexilis John Thomas Howell 1949-8-12 26231 Inyo Upper Cottonwood Lakes 3398 Comment
  CAS-BOT-BC73175  Pinus jeffreyi John Thomas Howell 1944-8-11 s.n. Tuolumne Tuolumne Meadows, Lambert Dome Comment
  CAS-BOT-BC78722  Pinus jeffreyi John Thomas Howell 1960-8-20 36207 Tehama Morgan 1463 Comment
  GH357159  Pinus radiata J. T. Howell 1982-10-9 54702 Unknown San Francisco, tree near the Pershing statue at east end of Music Concourse, Golden Gate Park, San Francisco Comment
  CAS-BOT-BC254455  Piptatherum miliaceum John Thomas Howell 1954-8-4 30023 Santa Clara Cowper Street between University Avenue and Lytton Street, Palo Alto Comment
  RSA98984  Piptatherum miliaceum J. T. Howell 1954-10-30 30114 Alameda Arlington Ave. near city limits, Berkeley Comment
  UC1042566  Plagiobothrys chorisianus John Thomas Howell 1953-5-7 28941 San Benito 3 mi nw San Juan Comment
  CAS-BOT-BC224954  Plagiobothrys hispidulus John Thomas Howell 1946-7-16 22426 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC224966  Plagiobothrys hispidulus John Thomas Howell 1962-7-10 38452 Kern Near Shirley Meadows, Greenhorn Mountains 1981 Comment
  CAS-BOT-BC58799  Plagiobothrys mollis var. mollis John Thomas Howell 1934-6-15 12197 Modoc Dorris Reservoir, 2 mi. E of Alturas. Comment
  CAS-BOT-BC228490  Plagiobothrys strictus John Thomas Howell 1926-3-28 1778 Napa Myrtledale Hot Springs near Calistoga Comment
  CAS-BOT-BC189649  Plagiobothrys torreyi John Thomas Howell 1924-5-30 357 Mariposa Wawona 1219 Comment
  CAS-BOT-BC230600  Plagiobothrys torreyi John Thomas Howell 1949-7-23 25656 Tulare Soldier Lake 3352 Comment
  CAS-BOT-BC230609  Plagiobothrys torreyi John Thomas Howell; Gordon H. True 1968-5-13 44260 Tulare North Meadow Creek, Kern Plateau 1981 Comment
  CAS-BOT-BC230612  Plagiobothrys torreyi John Thomas Howell; Gordon H. True 1966-7-11 41709 Tulare Horse Meadow, Kern Plateau 2255 Comment
  UC881362  Plagiobothrys undulatus John Thomas Howell 1937-6-6 13014 Sonoma Sebastopol Comment
  JEPS37918  Plantago elongata John Thomas Howell 1934-3-25 11780 Napa Cuttings Wharf Napa River Comment
  CDA6615  Plantago major J. T. Howell 1969-7-6 45867 San Francisco Fort Mason, San Francisco. 0 Comment
  RSA40164  Plantago truncata subsp. firma J. T. Howell 1944-5-21 19500 Marin Lagunitas Meadows north side of Mount Tamalpais. 244 Comment
  RSA751  Plectritis ciliosa subsp. insignis J. T. Howell 1928-4-14 913 San Bernardino Aliso Canyon, Rancho Santa Ana. 229 Comment
  CAS-BOT-BC326673  Pleurocoronis pluriseta John Thomas Howell 1977-3-11 52346 San Diego Southeast of Agua Caliente, Anza Borrego Desert State Park Comment
  CAS-BOT-BC260922  Pleuropogon californicus John Thomas Howell; Catherine Best; Wilma Follette; Gordon True 1981-5-21 54039 Solano Jepson Prairie Preserve of The Nature Conservancy in the vicinity of Olcutt Lake about 12 miles south of Dixon 6 Comment
  POM273149  Pleuropogon californicus var. californicus J. T. Howell 1945-5-9 20828 Marin between Hamilton Field and Ignacio, Marin County Comment
  UCD90098  Pleuropogon hooverianus John Thomas Howell 1947-4-27 23107 Marin Ross. Comment
  UC421657  Pluchea odorata var. odorata John Thomas Howell 1927-9-24 3117 Orange Santa Ana Canyon 152 Comment
  RSA40179  Poa J. T. Howell 1944-7-16 19813 Glenn Black Butte Comment
  CAS-BOT-BC255624  Poa annua John Thomas Howell; Gordon H. True 1970-7-29 47087 Tulare S end of Cannell Meadow on road to Pine Flat, Kern Plateau 2316 Comment
  UC1026500  Poa annua John Thomas Howell 1950-7-12 25744 Inyo Summit Creek e of Olancha Pass; Sierra Nevada 2743 Comment
  CAS-BOT-BC244348  Poa annua John Thomas Howell 1959-9-22 34864 Plumas Drakesbad 1737 Comment
  CAS-BOT-BC254779  Poa bolanderi John Thomas Howell 1939-8-9 15218 Siskiyou Sky High Valley, Marble Mountains 1828 Comment
  CAS-BOT-BC255696  Poa bolanderi John Thomas Howell 1958-7-21 33701 Fresno Dougherty Meadow 2834 Comment
  CAS-BOT-BC254950  Poa bulbosa John Thomas Howell 1960-5-2 35248 Mariposa Coulterville 530 Comment
  CAS-BOT-BC246901  Poa nervosa John Thomas Howell 1946-7-18 22504 Inyo South side of Mono Pass 3627 Comment
  CAS-BOT-BC256053  Poa pratensis John Thomas Howell 1950-7-15 26921 Tulare Bakeoven Meadows, South Fork of Kern River, Sierra Nevada 2468 Comment
  CAS-BOT-BC247393  Poa pratensis John Thomas Howell 1960-7-18 35510 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  UC1177121  Poa pratensis subsp. pratensis John Thomas Howell 1943-5-22 18116 Marin Fairfax Comment
  CAS-BOT-BC247521  Poa pringlei John Thomas Howell 1943-7-20 18606 Nevada Castle Peak Comment
  CAS-BOT-BC255021  Poa secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49521 Lassen Elysian Valley, W of Janesville 1325 Comment
  RSA300137  Poa secunda J. T. Howell 1967-6-23 42672 Plumas Canyon of Butterfly Creek just above its mouth 976 Comment
  CAS-BOT-BC247088  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True 1971-6-16 47992 Kern Weldon Meadow 1981 Comment
  SEINET7294036 Image available Poa secunda subsp. juncifolia John Thomas Howell, Gordon H. True 1970-1 47008 Tulare West side of Big Meadow just south of Pipe Spring. 2377 Comment
  UCD92375  Poa secunda subsp. juncifolia John Thomas Howell 1962-7-9 38348 Kern Sierra Nevada, Isabella. 762 Comment
  CAS-BOT-BC235999  Poa secunda subsp. secunda John Thomas Howell 1947-8-15 24120 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC236375  Poa secunda subsp. secunda John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53048 Calaveras Ridgetop near Dorrington 1524 Comment
  CAS-BOT-BC242987  Poa secunda subsp. secunda John Thomas Howell; et al. 1967-6-12 2085 Plumas Butterfly Botanical Area and Vicinity. Area near spring 1127 Comment
  CAS-BOT-BC243282  Poa secunda subsp. secunda John Thomas Howell 1951-7-17 27829 Tulare Mineral King and vicinity. White Chief Trail 2743 Comment
  CAS-BOT-BC244097  Poa secunda subsp. secunda John Thomas Howell 1953-5-25 29052 Tuolumne 2.5 miles from Keystone on road to Sonora 304 Comment
  CAS-BOT-BC244473  Poa secunda subsp. secunda John Thomas Howell 1956-3-23 31132 Monterey Salinas Valley, 1 mile S of San Lucas Comment
  CAS-BOT-BC244501  Poa secunda subsp. secunda John Thomas Howell 1964-4-26 40437 Mariposa Just SE of Mariposa, on road to Morman Bar 594 Comment
  CAS-BOT-BC244516  Poa secunda subsp. secunda John Thomas Howell 1943-8-8 19182 Mendocino Anthony Peak, Tehoma-Mendocino County Comment
  CAS-BOT-BC244145  Poa sierrae John Thomas Howell; Gordon H. True 1970-5-27 46555 El Dorado In Rubicon River Canyon, NNE of Leonardi Spring 1158 Comment
  CAS-BOT-BC6509  Poa sierrae John Thomas Howell; Gordon H. True 1967-5-9 42204 Plumas Feather River Canyon, 3.5 mi SW of Belden, Lewisia Rock 609 Comment
  CAS-BOT-BC6510  Poa sierrae John Thomas Howell; Gordon H. True 1967-5-9 42204 Plumas Feather River Canyon, 3.5 mi SW of Belden, Lewisia Rock 609 Comment
  GH24326  Poa sierrae J. T. Howell & G. H. True 1967-5-9 42204 Unknown Moist shaded slope in loose rocky soil near Lewisia Rock in the Feather Canyon (North Fork), 3.5 miles southwest of Belden, alt. ca. 2000 feet Comment
  GH361036  Poa sierrae J. T. Howell 1967-6-23 42740 Unknown Lewisia Rock, 3.5 miles southwest of Belden, Feather River Canyon 609 Comment
  UC710589  Poa stebbinsii John Thomas Howell 1944-8-12 20379 Tuolumne Gaylor Lakes 3291 Comment
  CAS-BOT-BC244274  Podagrostis humilis John Thomas Howell 1960-8-18 36063 Tehama Lassen Volcanic National Park. Bluff Falls 1981 Comment
  CAS-BOT-BC218387  Podistera nevadensis John Thomas Howell 1938-8-11 14542 Tuolumne Mt. Dana 3657 Comment
  UC1988913  Pogogyne douglasii John Thomas Howell 1929-8-4 4870 Napa three miles from Pope Valley Store on road to Pope Creek Canyon. Same locality as No. 4278 Comment
  GH364821  Polygonum J. T. Howell 1945-7-8 21284 Unknown San Antonio Station Comment
  UC1106193  Polygonum aviculare subsp. aviculare John Thomas Howell 1945-7-15 21291 Marin Fairfax Comment
  CAS-BOT-BC413963  Polygonum aviculare subsp. aviculare John Thomas Howell 1924-10-11 678 Alameda Euclid Avenue, Berkeley Comment
  CAS-BOT-BC414138  Polygonum aviculare subsp. aviculare John Thomas Howell; Gordon H. True 1970-6-23 46618 Tulare Cherry Hill Road at Burton Camp, Kern Plateau 1737 Comment
  CAS-BOT-BC414143  Polygonum aviculare subsp. aviculare John Thomas Howell 1952-10-28 28904 Tulare Eleven Range View Point, Sequoia Park 1584 Comment
  CAS-BOT-BC414187  Polygonum aviculare subsp. depressum John Thomas Howell 1960-8-20 36268 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  CAS-BOT-BC414220  Polygonum aviculare subsp. depressum John Thomas Howell 1961-9-22 36808 Plumas Greenville 1088 Comment
  RSA26309  Polygonum minimum J. T. Howell 1941-8-2 16686 Madera Near Garnet Lake. 2957 Comment
  CAS-BOT-BC418557  Polygonum minimum John Thomas Howell 1946-7-29 s.n. Inyo Gem Lake Comment
  CAS-BOT-BC419976  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1941-8-1 16655 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC420088  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1950-7-14 26821 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC419922  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1963-7-10 39742 Alpine 0.5 mile west of Monitor Pass 2529 Comment
  CAS-BOT-BC420161  Polygonum sawatchense subsp. sawatchense John Thomas Howell 1941-8-7 16813 Madera Near Garnet Lake 2956 Comment
  A364804  Polygonum shastense J. T. Howell 1943-7-21 18663 Unknown Donner Pass to Mt. Lincoln Comment
  CAS-BOT-BC109257  Polygonum shastense John Thomas Howell 1943-7-21 18663 Placer Donner Pass to Mount Lincoln. Comment
  CAS-BOT-BC421036  Polygonum spergulariiforme John Thomas Howell 1955-7-19 30805 Plumas Vinton 1505 Comment
  CAS-BOT-BC420980  Polygonum spergulariiforme John Thomas Howell 1947-9-6 24182 Marin East of Dillons Beach Comment
  CAS-BOT-BC76838  Polypodium glycyrrhiza John Thomas Howell; Gordon H. True 1967-5-9 42212 A Plumas Sierra Nevada - Lewisia Rock, 3.5 miles southwest of Belden, Feather River Canyon 609 Comment
  CAS-BOT-BC233236  Polypogon maritimus John Thomas Howell 1954-5-18 29852 Amador 2 miles NNW of Buena Vista 91 Comment
  POM273113  Polypogon maritimus J. T. Howell 1945-6-22 21218 Lake Sulphur Banks. Comment
  CAS-BOT-BC72309  Polystichum imbricans subsp. imbricans John Thomas Howell 1943-8-6 19113 Glenn Black Butte Comment
  CAS-BOT-BC102706  Populus tremuloides John Thomas Howell 1960-8-22 36375 Shasta Anklin Meadows 1889 Comment
  CAS-BOT-BC102739  Populus tremuloides John Thomas Howell 1958-5-27 33475 Inyo North Fork of Bishop Creek 2468 Comment
  CAS-BOT-BC453681  Potamogeton gramineus John Thomas Howell 1939-8-9 15195 Siskiyou Sky High Valley, Marble Mts. 1828 Comment
  SD149194  Potamogeton natans John Thomas Howell, Gordon H. True 1969-9-30 46396 Tulare Salmon Creek, W side of Big Meadow, Kern Plateau 2346 Comment
  CAS-BOT-BC453859  Potamogeton nodosus John Thomas Howell 1947-6-18 23256 Marin Chileno Valley Comment
  RSA97643  Potamogeton nodosus J. T. Howell 1950-7-27 27400 Mono East Walker River at Bridgeport. 1973 Comment
  CAS-BOT-BC267228  Potamogeton robbinsii John Thomas Howell 1947-8-15 24127 Inyo Big Pine Lakes, Fourth Lakes 3291 Comment
  CAS-BOT-BC539528  Potentilla biennis John Thomas Howell; Gordon H. True 1970-7-29 47119 Tulare Pine Flat, Kern Plateau 2194 Comment
  CAS-BOT-BC540035  Potentilla biennis John Thomas Howell 1977-8-11 52687 Plumas Sierra Nevada, Canyon of Little Last Chance Creek, between Chilcoot and Frenchmans Reserovoir 1706 Comment
  CAS-BOT-BC143207  Potentilla breweri John Thomas Howell 1944-8-10 20233 Mono North slope of Mt. Dana Comment
  CAS-BOT-BC143243  Potentilla flabellifolia John Thomas Howell 1946-7-15 22404 Inyo Ruby Lake, Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC141630  Potentilla gracilis var. elmeri John Thomas Howell 1925-7-2 1366 El Dorado Between Fallen Leaf Camp and Lake Tahoe Comment
  UC618512  Potentilla gracilis var. elmeri John Thomas Howell 1938-8-7 14292 Mono Whiskey Creek 2133 Comment
  CAS-BOT-BC141639  Potentilla gracilis var. elmeri John Thomas Howell 1950-7-25 27336 Tulare South Fork of Kern River 2468 Comment
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  CAS-BOT-BC541026  Potentilla gracilis var. fastigiata John Thomas Howell 1950-7-14 26878 Tulare Bakeoven Meadow, South Fork of Kern River 2468 Comment
  CAS-BOT-BC541072  Potentilla gracilis var. fastigiata John Thomas Howell; Gordon H. True 1966-7-11 41618 Tulare Poison Meadow, Kern Plateau 2286 Comment
  UC618419  Potentilla grayi John Thomas Howell 1938-8-13 14568 Mariposa Lake Tenaya Comment
  CAS-BOT-BC158541  Potentilla pseudosericea John Thomas Howell 1949-8-5 26063 Inyo Army Pass 3657 Comment
  UC904948  Potentilla pseudosericea John Thomas Howell 1949-8-5 26063 Inyo Army Pass Sierra Nevada, Army Pass 3657 Comment
  CAS-BOT-BC225021  Poteridium annuum John Thomas Howell 1934-6-11 11922 Modoc Parker Creek, Warner Mts. 1584 Comment
  CAS-BOT-BC47642  Primula suffrutescens John Thomas Howell 1942-7-31 17460 Tulare Above timberline, Mt. Kaweah Comment
  RSA44180  Primula suffrutescens J. T. Howell 1947-8-10 23974 Inyo Near Sam Mack Lake, Big Pine Lakes 3659 Comment
  SD149134  Prunella vulgaris var. lanceolata John Thomas Howell, Gardon H. True and Margaret Williams 1973-6-28 49443 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CAS-BOT-BC158594  Prunus John Thomas Howell 1959-9-24 34940 Plumas Butterfly Creek near mouth Comment
  UC861018  Prunus emarginata John Thomas Howell 1939-8-4 15029 Siskiyou between Elk Mountain and Marble Rim (Marble Mountains); Marble Mountains Comment
  CAS-BOT-BC151154  Prunus subcordata John Thomas Howell 1962-9-26 38941 Kern 5.5 miles east of Glennville - Greenhorn Mountains, Sierra Nevada 1371 Comment
  CAS-BOT-BC151166  Prunus subcordata John Thomas Howell 1965-4-26 41149 Madera 3 miles south of Oakhurst - Sierra Nevada 914 Comment
  RSA99710  Prunus subcordata J. T. Howell 1953-5-24 29014 A Tuolumne Sonora Pass Road between Sugar Pine and Pinecrest. Comment
  CAS-BOT-BC151239  Prunus virginiana var. demissa John Thomas Howell 1937-7-21 13164 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC154853  Prunus virginiana var. demissa John Thomas Howell 1924-8-10 610 Plumas Crescent Mills 1219 Comment
  CAS-BOT-BC356403  Pseudognaphalium beneolens John Thomas Howell 1970-9-22 47245 Kern Along Kern River between Kernville and River Kern 822 Comment
  CAS-BOT-BC356637  Pseudognaphalium biolettii John Thomas Howell; R. C. Barneby 1954-5-8 29216 Tulare Middle Fork Tule River Canyon, 5 miles above Springville 548 Comment
  CAS-BOT-BC356688  Pseudognaphalium californicum John Thomas Howell 1962-7-7 38174 Kern Kern River Canyon 533 Comment
  CAS-BOT-BC356737  Pseudognaphalium californicum John Thomas Howell 1943-5-9 17956 Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC356879  Pseudognaphalium californicum John Thomas Howell 1931-4-12 6284 Santa Barbara Cochie Canyon, Santa Cruz Island Comment
  CAS-BOT-BC356953  Pseudognaphalium canescens John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54420 Amador Peddler Hill, Carson Pass road 2084 Comment
  CAS-BOT-BC357088  Pseudognaphalium luteoalbum John Thomas Howell 1936-9-4 12890 San Francisco In Sutro Forest, San Francisco Comment
  UCD135083  Pseudognaphalium luteoalbum John Thomas Howell 1943-6-20 18243 San Francisco Concert Valley, Golden Gate Park, San Francisco. Comment
  CAS-BOT-BC357318  Pseudognaphalium microcephalum John Thomas Howell 1930-10-25 5683 Monterey Canyon of the Arroyo Seco River, Santa Lucia Mts. Comment
  CAS-BOT-BC361511  Pseudognaphalium stramineum John Thomas Howell 1957-5-17 32239 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC357592  Pseudognaphalium stramineum John Thomas Howell 1925-11-7 1556 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC361664  Pseudognaphalium thermale John Thomas Howell 1963-8-20 40202 Inyo Whitney Portal road 2346 Comment
  CAS-BOT-BC239801  Pseudoroegneria spicata John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50693 Lassen South and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC361764  Psilocarphus brevissimus var. brevissimus John Thomas Howell 1926-6-18 2035 Merced Merced plains, 3 miles sw. of Merced Comment
  CAS-BOT-BC361863  Psilocarphus oregonus John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53943 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC72607  Pteridium aquilinum John Thomas Howell 1960-8-22 36386 Shasta Anklin Meadows 1889 Comment
  CAS-BOT-BC72639  Pteridium aquilinum John Thomas Howell 1956-9-9 31861 San Francisco se. end of Lake Merced Comment
  CAS-BOT-BC239754  Ptilagrostis kingii John Thomas Howell 1947-8-4 23722 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  SEINET7614795 Image available Puccinellia nutkaensis J. T. Howell 1945-8-19 21434 Marin Head of Drake's Bay Comment
  CAS-BOT-BC147851  Purshia tridentata var. tridentata John Thomas Howell 1950-7-28 27416 Mono [Leevining] Lee Vining Canyon 2255 Comment
  CAS-BOT-BC147878  Purshia tridentata var. tridentata John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1967-7-10 2207 Plumas Mouth of Butterfly Creek 883 Comment
  CAS-BOT-BC465995  Pyrola minor John Thomas Howell 1942-8-5 17743 Tulare Kaweah Meadows, Chagoopa Plateau Comment
  POM304572  Pyrrocoma apargioides J. T. Howell 1941-7-31 16609 Madera Ridge NW of San Joaquin Mt. Comment
  RSA165  Quercus X acutidens J. T. Howell 1927-8-7 602 San Diego Near Dulzura Ranch. 335 Comment
  CAS-BOT-BC94696  Quercus X howellii John Thomas Howell 1955-6-15 30495 Butte 6 miles from Paradise on road to Pentz 426 Comment
  CAS-BOT-BC94704  Quercus X howellii John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary Wells 1981-5-14 53936 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles NE of Penngrove on the W slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC104195  Quercus X morehus John Thomas Howell 1965-4-26 41162 Madera Sierra Nevada. 3 miles S of Oakhurst 914 Comment
  UCD46972  Quercus X morehus John Thomas Howell 1965-4-26 41162 Madera In zone of granitic rocks, 3 miles S of Oakhurst. 914 Comment
  CAS-BOT-BC104417  Quercus X subconvexa John Thomas Howell 1941-4-17 s.n. Marin Wind-swept hills above Tiburon Comment
  UC1177408  Quercus X subconvexa John Thomas Howell 1941-7-6 16364 Marin Hidden Lake Mt. Tamalpais Comment
  CAS-BOT-BC61677  Quercus agrifolia John Thomas Howell 1952-10-20 28860 Santa Barbara La Purisima Ridge Comment
  UCD45037  Quercus agrifolia John Thomas Howell 1963-8-7 40089 Monterey Mustang Grade between Mustang Summit and Priest Valley. With 40088. Comment
  RSA158  Quercus agrifolia var. oxyadenia J. T. Howell 1927-8-7 600 San Diego Dulzura Creek. 305 Comment
Read comments
Nov 14 2016
  RSA162  Quercus berberidifolia J. T. Howell 1927-8-2 576 Riverside Road to Hemet, Mt. San Jacinto. 1372 Comment
  CAS-BOT-BC62392  Quercus chrysolepis John Thomas Howell 1927-7-9 2701 San Bernardino Whiskey Springs, Cushenbury Road, N ridge of San Bernardino Mts. 1652 Comment
  CAS-BOT-BC62584  Quercus chrysolepis John Thomas Howell; Gordon H. True 1971-7-15 47752 Kern Sierra Nevada. Flying Dutchman Creek canyon on Havilah - Mt. Breckendrige road 1188 Comment
  CAS-BOT-BC62666  Quercus chrysolepis John Thomas Howell 1940-7-28 15607 Fresno Bubbs Creek - zigzags east of Kings Canyon Comment
  CAS-BOT-BC62694  Quercus chrysolepis John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52787 Calaveras Camp Nine Road northeast of Vallecito 609 Comment
  CAS-BOT-BC86562  Quercus chrysolepis John Thomas Howell; Gordon H. True 1968-5-14 44373 Tulare Cherry Hill Road at Rincon Trail, Brush Creek Canyon, Kern Plateau 1463 Comment
  SFV8714  Quercus chrysolepis J. T. Howell 1963-8-21 40216 Inyo Sierra Nevada Whitney Portal Road. 2256 Comment
  CAS-BOT-BC86103  Quercus dumosa John Thomas Howell 1955-6-15 30497 A Butte 6 miles from paradise on road to Pentz 426 Comment
  CAS-BOT-BC86117  Quercus dumosa John Thomas Howell 1955-6-15 30492 Butte 6 miles from Paradise on road to Pentz 426 Comment
  CAS-BOT-BC86386  Quercus dumosa John Thomas Howell 1928-3-20 3476 Los Angeles Hills E of Vermont Canyon, Griffith Park Comment
  CAS-BOT-BC86434  Quercus dumosa John Thomas Howell 1933-8-27 11647 Napa E of Chiles Valley on road to Winters, Napa Range Comment
  CAS-BOT-BC79759  Quercus durata John Thomas Howell 1927-10-16 3153 Los Angeles on the trail between Santa Anita Canyon and Sierra Madre, San Gabriel Mts. Comment
  UCD45906  Quercus durata var. durata John Thomas Howell 1959-9-21 34791 Plumas El. 2500 feet, Plumas County. 762 Comment
  CAS-BOT-BC94674  Quercus garryana John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-20 53503 Trinity One-eye Flat, about 1.7 miles N of Carrville, Trinity River Canyon 755 Comment
  CAS-BOT-BC94339  Quercus garryana var. breweri John Thomas Howell; Gordon H. True 1971-6-15 47750 Kern Flying Dutchman Creek canyon on Havilah Mt. Breckenridge road 1188 Comment
  CAS-BOT-BC105246  Quercus kelloggii John Thomas Howell 1976-7-19 51946 Lassen SW of Susanville on Gold Run Road 1341 Comment
  CAS-BOT-BC105292  Quercus kelloggii John Thomas Howell 1927-8-23 3044 Napa Hills on N ridge of Chiles Valley, Napa Range 213 Comment
  CAS-BOT-BC62880  Quercus lobata John Thomas Howell 1930-10-19 5608 Napa Pope Valley School, Pope valley Comment
  UC1177323  Quercus lobata John Thomas Howell 1947-5-18 Marin Fairfax Hills Comment
  POM183381  Quercus parvula var. parvula J. T. Howell 1931-4-13 6323 Santa Barbara Santa Cruz Island. near west end. Comment
  CAS-BOT-BC104605  Quercus vacciniifolia John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54401 Plumas Sierra Nevada, Basalt Formation, Walker Plain, about 8 miles SW of Bucks Lake on road to Oroville 1554 Comment
  CAS-BOT-BC104654  Quercus vacciniifolia John Thomas Howell 1944-8-14 20498 Tuolumne Glen Aulin Comment
  UCD47425  Quercus vacciniifolia John Thomas Howell; Gordon H. True 1969-6-25 45846 Sierra 3 miles north of Bassetts on road to Gold Lake, Sierra County. 1950 Comment
  UCD47453  Quercus vacciniifolia John Thomas Howell 1969-9-15 46224 Tuolumne Near Cow Creek, 5 miles north of Strawberry, Tuolumne Co. 2667 Comment
  CAS-BOT-BC104697  Quercus wislizeni John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52747 Calaveras Camp Nine Road noertheast of Vallecito 609 Comment
  CAS-BOT-BC104881  Quercus wislizeni John Thomas Howell 1927-8-22 3033 Marin on S side of Mt. Tamalpais above Mill Valley 152 Comment
  UCD47633  Quercus wislizeni John Thomas Howell; Gordon H. True 1967-5-30 42428 Tulare Slopes west of Lamont Meadow, Kern Plateau, Tulare County. 1706 Comment
  CAS-BOT-BC362419  Rafinesquia John Thomas Howell 1928-3-24 3492 San Diego Near Palm Wash, w. Colorado Desert Comment
  CAS-BOT-BC379434  Ranunculus alismifolius var. hartwegii John Thomas Howell 1943-7-17 8490 Placer west side of Donner Pass near Norden, Boreal Ridge 2134 Comment
  RSA305  Ranunculus cymbalaria var. saximontanus J. T. Howell 1927-7-19 3769 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  UC1176747  Ranunculus pusillus John Thomas Howell 1946-6-16 22082 Marin Olema Marshes Comment
  RSA98987  Ranunculus sceleratus var. multifidus J. T. Howell 1953-5-22 28970 Stanislaus 3 miles from Oakdale on Manteca road Comment
  CAS-BOT-BC362893  Rhagadiolus stellatus John Thomas Howell 1980-5-15 53451 Napa Oakville Grade sw. of Oakville 152 Comment
  CAS-BOT-BC59565  Rhamnus John Thomas Howell 1976-5-19 51770 Kern Sierra Nevada - Greenhorn Mountains - between Isabella Dam and Keysville 822 Comment
  CAS-BOT-BC170448  Rhus integrifolia John Thomas Howell 1928-3-2 3367 Los Angeles Griffith Park Comment
  CAS-BOT-BC111866  Rhynchospora alba John Thomas Howell; Hans Leschke 1945-5-30 20896 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC111908  Rhynchospora capitellata John Thomas Howell 1936-8-27 12845 Trinity Near Trinity Center Comment
  UCR89360  Ribes amarum J. T. Howell 1960-5-2 35244 Mariposa Sierra Nevada Mtns, Serpentine area NW of Coulterville Comment
  CAS-BOT-BC92459  Ribes aureum var. gracillimum John Thomas Howell 1963-6-22 39565 Monterey Priest Valley. Comment
  A380218  Ribes indecorum J. T. Howell 1929-3-2 4100 Unknown San Gabriel Wash, 2 miles s. of Azusa Comment
Read comments
Jul 28 2014
  CAS-BOT-BC168886  Ribes lobbii John Thomas Howell; Alice Eastwood 1941-7-9 9834 Tehama Near Government Flat Comment
  CAS-BOT-BC168926  Ribes malvaceum John Thomas Howell 1954-11-3 30138 Monterey Arroyo Seco River Canyon, Santa Lucia Mts. Comment
  CAS-BOT-BC168957  Ribes malvaceum John Thomas Howell 1931-3-29 6027 San Benito Hernandez Comment
  CAS-BOT-BC209252  Ribes menziesii John Thomas Howell 1950-10-11 27469 Marin Bear Valley Comment
  CAS-BOT-BC212585  Ribes montigenum John Thomas Howell 1960-8-19 36149 Tehama Brokeoff Mountain Trail 2682 Comment
  CAS-BOT-BC212612  Ribes montigenum John Thomas Howell 1948-7-28 25120 Tulare Center Basin 3657 Comment
  JEPS33678  Ribes roezlii John Thomas Howell 1923-5-25 16 Mariposa Wawona 1219 Comment
  CAS-BOT-BC199009  Ribes roezlii var. roezlii John Thomas Howell 1962-7-8 38257 Kern Black Mt. south side - Greenhorn Mountains, Sierra Nevada 1432 Comment
  CAS-BOT-BC199012  Ribes roezlii var. roezlii John Thomas Howell; Gordon H. True 1971-6-16 48007 Kern 1.5 miles south of Piute Peak, Sierra Nevada 2316 Comment
  CAS-BOT-BC168677  Ribes speciosum John Thomas Howell 1928-3-4 3380 Los Angeles Santa Monica Mountains, ne. of Pacific Palisades Comment
  RSA351  Ribes speciosum J. T. Howell 1928-3-18 888 Orange Aliso Canon [Canyon], Rancho Santa Ana. 229 Comment
  CAS-BOT-BC173877  Ribes velutinum John Thomas Howell 1958-5-27 33480 Inyo North Fork of Bishop Creek 2438 Comment
  A380990  Ribes victoris J. T. Howell 1942-7-12 17033 Unknown Above Lake Lagunitas (type locality), Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC168748  Ribes victoris John Thomas Howell 1943-3-7 17884 Marin Hills northeast of San Rafael Comment
  POM261634  Ribes victoris J. T. Howell 1940-5-19 s.n. Napa Upper St. Helena Creek. Comment
  POM304546  Ribes victoris J. T. Howell 1942-7-12 s.n. Marin Above Lake Lagunitas (type locality), Northside Trail, Mount Tamalpais Comment
  CAS-BOT-BC168811  Ribes viscosissimum John Thomas Howell 1960-8-21 36305 Tehama Near Sulphur Works entrance, Lassen Volcanic National park 1996 Comment
  CAS-BOT-BC362933  Rigiopappus leptocladus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53423 Siskiyou East side of Scott Valley, 10 miles south of Fort Jones on road to Callahan 853 Comment
  RSA7686  Romanzoffia californica J. T. Howell 1933-4-30 11195 Marin North side of Mt. Tamalpais. Comment
  RSA315  Romneya coulteri J. T. Howell 1928-7-7 1036 Riverside Santa Ana Mts. above Glen Ivy. 610 Comment
  CAS-BOT-BC74516  Rorippa curvisiliqua John Thomas Howell 1970-9-22 47262 Kern Sierra Nevada. Along Kern River between Kernville and River Kern. 822 Comment
  CAS-BOT-BC74658  Rorippa curvisiliqua John Thomas Howell 1939-8-5 15064 Siskiyou Spirit Lake, Marble Mountains. 1828 Comment
  CAS-BOT-BC74665  Rorippa curvisiliqua John Thomas Howell 1969-9-13 46109 Sierra Sierra Nevada. Little Truckee River near outlet of Webber Lake. 2042 Comment
  CAS-BOT-BC95039  Rorippa palustris var. hispida John Thomas Howell 1934-6-15 12187 Modoc Alturas. Comment
  CAS-BOT-BC148082  Rosa bridgesii John Thomas Howell 1973-10-16 50255 Tulare Giant Forest, Sierra Nevada 2011 Comment
  CAS-BOT-BC148171  Rosa gymnocarpa John Thomas Howell; Walter Knight; Irja Knight; Gordon H. True 1969-6-24 2627 Plumas Ner Overnight Camp - Butterfly Botanical Area and vicnity 1097 Comment
  UCD113899  Rosa rubiginosa John Thomas Howell 1953-5-23 28992 Tuolumne Sierra Nevada. Columbia. 640 Comment
  CAS-BOT-BC146925  Rosa woodsii John Thomas Howell 1947-7-18 23430 Los Angeles Big Pines, San Gabriel Mts. 2103 Comment
  CAS-BOT-BC149768  Rosa woodsii subsp. ultramontana John Thomas Howell; Gordon H. True 1971-7-14 48423 Tulare North Fork of Manter Creek, Kern Plateau 2225 Comment
  CAS-BOT-BC274270  Rostraria cristata John Thomas Howell; R. C. Barneby 1954-5-9 29236 Tulare 7 miles north of Woodlake Comment
  RSA43312  Rostraria cristata J. T. Howell 1948-6-15 24376 San Luis Obispo Gillis Canyon, SE of Shandon 457 Comment
  CAS-BOT-BC156623  Rubus bifrons John Thomas Howell 1943-8-29 19311 Marin Summit (Avenue) Ridge, Mill Valley Comment
  CAS-BOT-BC433197  Rubus flagellaris John Thomas Howell 1961-9-23 36839 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC148380  Rubus leucodermis John Thomas Howell 1958-7-30 34130 Fresno Simpson Meadow, Middle Fork of the Kings River - Sierra Nevada 1828 Comment
  CAS-BOT-BC147172  Rubus parviflorus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49479 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC147365  Rubus pensilvanicus John Thomas Howell 1963-5-18 39291 Monterey 2.5 miles s. of Aromas 60 Comment
  CAS-BOT-BC158840  Rubus ursinus John Thomas Howell 1938-6-19 13918 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC158849  Rubus ursinus John Thomas Howell 1938-6-19 13929 Marin Near Rattlesnake, Mt. Tamalpais Comment
  CAS-BOT-BC363137  Rudbeckia californica John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54421 Amador Peddler Hill, Carson Pass road 2084 Comment
  CAS-BOT-BC421937  Rumex acetosella John Thomas Howell 1962-7-11 38588 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC421973  Rumex acetosella John Thomas Howell 1923-6-5 28 Mariposa Wawona Valley 1219 Comment
  JEPS58028  Rumex acetosella John T. Howell 1923-6-5 28 Mariposa near Hotel Wawona; Wawona Valley Comment
  CAS-BOT-BC422201  Rumex californicus John Thomas Howell 1942-8-1 17540 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  CAS-BOT-BC433902  Rumex salicifolius John Thomas Howell 1962-7-8 38295 Kern 1.5 miles southeast of Summit, Greenhorn Mountains 1524 Comment
  CAS-BOT-BC433931  Rumex salicifolius John Thomas Howell 1946-6-30 22136 Marin Rodeo Lagoon Comment
  CAS-BOT-BC434083  Rumex transitorius John Thomas Howell 1956-7-1 31647 San Francisco Front and Vallejo streets, San Francisco Comment
  CAS-BOT-BC434313  Rumex triangulivalvis John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54398 Plumas Haskins Valley just south of Bucks Lake. 1572 Comment
  CAS-BOT-BC109418  Rumex venosus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49231 Lassen Sierra Nevada. On Highway 395 northwest of Doyle on road to Milford. 1280 Comment
  CAS-BOT-BC132775  Salix arctica John Thomas Howell 1949-8-12 26237 Inyo Cottonwood Lakes 3383 Comment
  CAS-BOT-BC132824  Salix arctica John Thomas Howell; Gordon H. True 4400 Mono Virginia Lakes basin ca. 3 1/4 miles southwest of Conway Summit, above Cooney Lake 2956 Comment
  CAS-BOT-BC103197  Salix bonplandiana John Thomas Howell 1963-8-5 39919 Monterey Along Watsonville-San Juan Road, about 2 miles south of Aromas Comment
  GH382389  Salix bonplandiana J. T. Howell 1960-3-25 35167 Unknown 10 miles east of Onyx Comment
  CAS-BOT-BC102815  Salix boothii John Thomas Howell 1939-8-7 15132 A Siskiyou Sky High Valley, Marble Mts. 1828 Comment
  POM362894  Salix boothii J. T. Howell 1947-8-16 24170 Inyo Big Pine Creek, N. Fork. 2622 Comment
  CAS-BOT-BC102877  Salix breweri John Thomas Howell 1931-4-3 6149 B Lake Butts Valley Road to Middletown, 5 miles from Aetna Springs Comment
  CAS-BOT-BC108607  Salix drummondiana John Thomas Howell 1958-5-24 33260 Inyo Whitney Portal - Sierra Nevada 2529 Comment
  A382548  Salix eastwoodiae J. T. Howell 1944-8-16 20615 Unknown Mono Pass Comment
  CAS-BOT-BC103876  Salix exigua John Thomas Howell; H. Keith Wagnon 1980-5-26 53592 Plumas North Fork of Feather River between the mouth of East Branch and Caribou 792 Comment
  CAS-BOT-BC107981  Salix exigua John Thomas Howell; Gordon H. True 1966-7-10 41592 Tuolumne On bank of Kern River at Roads End - Sierra Nevada 1066 Comment
  CAS-BOT-BC125193  Salix lasiandra var. lasiandra John Thomas Howell 1925-5-28 1097 El Dorado Emerald Bay Camp on strand, Lake Tahoe 1889 Comment
  CAS-BOT-BC125516  Salix lasiandra var. lasiandra John Thomas Howell 1960-6-6 35313 Tulare General Grant Ranger Station 1950 Comment
  CAS-BOT-BC128093  Salix lasiandra var. lasiandra John Thomas Howell 1964-4-18 40436 Monterey Robinson Canyon - Santa Lucia Mountains Comment
  CAS-BOT-BC128150  Salix lasiandra var. lasiandra John Thomas Howell 1980-9-8 53897 Marin Between Alpine and Bon Tempe Lakes Comment
  CAS-BOT-BC107160  Salix lasiolepis var. bigelovii John Thomas Howell; T. C. Fuller 1981-6-25 54353 Plumas 4.8 miles northwest of Antelope Reservior - Sierra Nevada 1661 Comment
  CAS-BOT-BC107338  Salix lasiolepis var. bigelovii John Thomas Howell 1963-8-5 39920 Monterey Along Watsonville-San Juan Road, about 2 miles south of Aromas Comment
  CAS-BOT-BC128325  Salix lasiolepis var. lasiolepis John Thomas Howell 1955-6-12 30318 Tehama Flood bed of Dibble Creek, 1.5 miles north of Red Bluff 91 Comment
  CAS-BOT-BC128526  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1971-6-16 47968 Kern Meadow in Jeffrey pine forest, Claraville - Sierra Nevada 1920 Comment
  CAS-BOT-BC124605  Salix lemmonii John Thomas Howell 1925-5-28 1098 El Dorado Emerald Bay Camp, Lake Tahoe 1889 Comment
  RSA503331  Salix lemmonii J. T. Howell 1969-8-28 46024 Tulare Mineral King. 2378 Comment
  UC846412  Salix lemmonii John Thomas Howell 1938-8-10 14486 Mono Minaret Summit Comment
  GH383929  Salix lemmonii J. T. Howell & G. H. True 1968-7-15 4389 Unknown Just west of Sonora Pass, on Hwy. 108 2804 Comment
  NY187800  Salix lucida subsp. caudata J. T. Howell 1973-5-12 49221 Lassen Elysian Valley northwest of Janesville 1325.9 Comment
  CAS-BOT-BC129385  Salix melanopsis John Thomas Howell; Gordon H. True 1967-7-9 43253 Plumas North Fork of Feather River 3 miles southwest of Caribou - Sierra Nevada 853 Comment
  SBBG41736  Salix melanopsis J. T. Howell 1970-3-31 46496 Monterey Carmel Valley Comment
  A384328  Salix orestera J. T. Howell 1943-7-15 18351 Unknown West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC125762  Salix orestera John Thomas Howell 1941-8-6 16782 A Madera Headwaters of Shadow Creek se. of Mt. Ritter Comment
  CAS-BOT-BC125800  Salix orestera John Thomas Howell 1944-8-16 20640 Mono Mono Pass Comment
  CAS-BOT-BC125804  Salix orestera John Thomas Howell 1944-8-10 20205 Mono Tioga Pass Comment
  CAS-BOT-BC129299  Salix orestera John Thomas Howell 1958-5-24 33265 Inyo Whitney Portal - Sierra Nevada 2529 Comment
  CAS-BOT-BC126148  Salix scouleriana John Thomas Howell 1939-8-5 15080 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC129033  Salix scouleriana John Thomas Howell 1961-6-20 36540 Shasta Lassen Highway at east edge of Chaos Jumbles - Lassen Volcanic National Park Comment
  CAS-BOT-BC129108  Salix scouleriana John Thomas Howell 1950-7-12 26720 Inyo Jeffrey pine belt, Sage Flat to Olancha Pass 2743 Comment
  CAS-BOT-BC126428  Salix sitchensis John Thomas Howell 1943-7-4 18263 Marin Ledum Swamp on road to Pt. Reyes Comment
  CAS-BOT-BC126466  Salix sitchensis John Thomas Howell 1954-11-3 30125 Monterey Santa Lucia Memorial Park, Arroyo Seco River Comment
  CAS-BOT-BC175954  Salpichroa origanifolia John Thomas Howell 1944-9-16 20740 Marin Cascade Drive, Mill Valley Comment
  CAS-BOT-BC176908  Salsola tragus John Thomas Howell 1960-6-5 35288 Merced Delhi 36 Comment
  CAS-BOT-BC220718  Salvia John Thomas Howell 1931-3-19 5873 Fresno Near Oil Fields Comment
  CAS-BOT-BC214299  Salvia dorrii var. pilosa John Thomas Howell 1930-5-13 5004 Kern East side of Walker Pass 1371 Comment
  CAS-BOT-BC238846  Sambucus nigra subsp. caerulea John Thomas Howell 1961-6-21 36649 Plumas Greenville 1097 Comment
  UC691880  Sanicula saxatilis J. T. Howell 1942-5-24 16969 Contra Costa Mount Diablo, Eagle Point Mount Diablo; , Eagle Point Comment
  CAS-BOT-BC466321  Sarcodes sanguinea John Thomas Howell 1973-7-10 49786 Lassen Sierra Nevada, Fredonyer Pass 1737 Comment
  CAS-BOT-BC283128  Schedonorus arundinaceus John Thomas Howell 1964-6-30 40880 San Luis Obispo Cambria Comment
  CAS-BOT-BC283638  Schedonorus pratensis John Thomas Howell 1956-5-12 31387 San Francisco Vacant ground, Third and Gilman Sts, San Francisco Comment
  CAS-BOT-BC111310  Schoenoplectus acutus var. occidentalis John Thomas Howell 1939-9-10 s.n. Marin Stinson Beach Comment
  CAS-BOT-BC111314  Schoenoplectus acutus var. occidentalis John Thomas Howell 1946-6-30 22169 Marin Rodeo Lagoon Comment
  CAS-BOT-BC111467  Schoenoplectus americanus John Thomas Howell 1963-7-10 39677 Alpine Mineralized soil of bog at Grover Hot Springs 1798 Comment
  CAS-BOT-BC111217  Scirpus John Thomas Howell 1977-8-2 52461 Calaveras Transition Zone forest just east of Big Meadow on Ebbetts Pass Road. 1996 Comment
  CAS-BOT-BC110900  Scirpus microcarpus John Thomas Howell 1946-9-1 22965 El Dorado Echo Summit Comment
  CAS-BOT-BC110912  Scirpus microcarpus John Thomas Howell 1940-7-28 15645 Fresno Near Sphinx Creek Comment
  CAS-BOT-BC240030  Scribneria bolanderi John Thomas Howell 1955-6-14 30425 Shasta East of Whiskeytown Comment
  GH361130  Scribneria bolanderi J. T. Howell 1946-5-12 21776 Unknown South end of Carson Ridge Comment
  CAS-BOT-BC240011  Scribneria bolanderi John Thomas Howell 1945-4-29 20791 Marin West of Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC61500  Sedum lanceolatum John Thomas Howell; Gordon H. True 1970-8-10 6156 A Nevada Cave lake just south of Lindsey Lakes on north slope of Fall Creek Mt. 2072 Comment
  CAS-BOT-BC69084  Sedum lanceolatum John Thomas Howell 1944-8-12 20416 Tuolumne Gaylon Lakes, 3291 Comment
  SEINET179622 Image available Selaginella bigelovii J. T. Howell 1927-7-22 2834 Orange Claymine Canyon Santa Ana Mtns 183 Comment
  CAS-BOT-BC69685  Selaginella watsonii John Thomas Howell 1942-7-31 17492 Tulare Mt. Kaweah. 3962 Comment
  CAS-BOT-BC62234  Selaginella watsonii John Thomas Howell 1941-8-8 16869 Mono San Joaquin Mt. Comment
  CAS-BOT-BC363328  Senecio aronicoides John Thomas Howell 1948-5-22 24306 Marin East Peak, near top, Mt. Tamalpais Comment
  CAS-BOT-BC363713  Senecio hydrophilus John Thomas Howell 1938-8-7 14354 Mono Crooked Creek 2042 Comment
  CAS-BOT-BC50258  Senecio integerrimus var. exaltatus John Thomas Howell 1934-6-11 11950 Modoc Parker Creek, Warner Mountains 1584 Comment
  CAS-BOT-BC333016  Senecio scorzonella John Thomas Howell 1942-8-6 17766 A Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC333032  Senecio scorzonella John Thomas Howell 1946-7-14 22235 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC332901  Senecio spartioides John Thomas Howell 1950-8-29 27462 Mono Summit between Crestview and Mono Lake, Sierra Nevada 2438 Comment
  CAS-BOT-BC332932  Senecio spartioides John Thomas Howell 1947-8-3 23684 Inyo Big Pine Creek 2743 Comment
  RSA201454  Sequoia sempervirens J. T. Howell 1957-2-3 32020 Marin Fern Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC10496  Sequoiadendron giganteum John Thomas Howell 1927-8-30 3083 Tulare Giant Forest, Sequoia National Park 1981 Comment
  CAS-BOT-BC243544  Setaria parviflora John Thomas Howell 1946-9-8 22997 Marin Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC213135  Sidalcea John Thomas Howell 1961-6-21 36604 Plumas Greenville, Sierra Nevada 1097 Comment
  CAS-BOT-BC205537  Sidalcea hickmanii subsp. viridis John Thomas Howell; Antonio Krapovickas 1954-6-23 30005 Marin Carson Ridge Comment
  RSA127567  Sidalcea hickmanii subsp. viridis J. T. Howell 1954-6-23 s.n. Marin Carson Ridge Comment
  UC517485  Sidalcea malviflora subsp. malviflora John Thomas Howell 1933-4-9 10974 San Mateo 2 mi n Pigeon Pt.; n of Pigeon Pt. Comment
  CAS-BOT-BC213164  Sidalcea oregana subsp. hydrophila John Thomas Howell 1943-8-4 19024 Glenn Summit ridge N. of Black Butte Comment
  CAS-BOT-BC384390  Silene bernardina John Thomas Howell; Gordon H. True 1967-8-9 43638 Tulare About 2.5 miles north of Blackrock Guard Station on Monache Jeep Trail. Kern Plateau 2682 Comment
  CAS-BOT-BC384432  Silene coronaria John Thomas Howell 1966-7-28 42006 Plumas 5 miles north of Quincy on road to Keddie Comment
  CAS-BOT-BC385888  Silene douglasii John Thomas Howell 1925-7-2 1313 El Dorado Between Fallen Leaf Camp and Glen Alpine Lodge, Lake Tahoe region Comment
  CAS-BOT-BC392500  Silene gallica John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53953 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngove on the west slope of Sonoma Mountain. 457 Comment
  CAS-BOT-BC389091  Silene laciniata subsp. californica John Thomas Howell; Gordon H. True 1971-6-17 48061 Kern Bodfish Grove of Piute Cypress, 2 miles east of Bodfish Gap 1432 Comment
  NY452568  Silene lemmonii J. T. Howell 1934-6-11 11958 Modoc Parker Creek, Warner Mountains 1585.0 Comment
  RSA95419  Silene occidentalis J. T. Howell 1951-6-27 27557 Plumas Johnsville; Sierra Nevada 1585 Comment
  CAS-BOT-BC389790  Silene sargentii John Thomas Howell 1949-8-5 26070 Inyo Army Pass 3657 Comment
  RSA220026  Silene scouleri J. T. Howell 1957-6-30 32799 San Francisco Summit ridge, Bayview Hills. Comment
  RSA201484  Silene verecunda subsp. platyota J. T. Howell 1958-7-22 33713 Fresno Simpson Meadow, Middle Fork of the Kings River. 1829 Comment
  UC1347176  Sisymbrium orientale John Thomas Howell 1937-8-13 San Francisco San Francisco, on Masonic Avenue San Francisco Comment
  UC750588  Sisymbrium orientale John Thomas Howell 1946-5-11 21759 San Francisco San Francisco, Duboce and Market Streets San Francisco Comment
  CAS-BOT-BC75431  Sisymbrium orientale John Thomas Howell 1940-5-27 s.n. San Francisco San Francisco on Masonic Avenue near Geary Street. Comment
  OBI14951  Sisymbrium orientale John Thomas Howell 1948-6-14 24338 Monterey Between Gonzales and Soledad Comment
  CAS-BOT-BC156775  Solanum umbelliferum J. T. Howell 1942-7-26 17251 Tulare Mineral King Comment
  GH267020  Solanum umbelliferum J. T. Howell 1930-9-28 5512 Unknown Holt Comment
  RSA1080  Solidago californica J. T. Howell 1928-6-30 1026 Ventura Santa Susana Pass Comment
  CAS-BOT-BC364981  Solidago confinis John Thomas Howell 1970-9-25 47444 28b Kern About 2 miles south of Kernville on road to Weldon 792 Comment
  CAS-BOT-BC365450  Solidago elongata John Thomas Howell 1946-6-30 22155 Marin Rodeo Lagoon Comment
  CAS-BOT-BC365775  Solidago spectabilis John Thomas Howell 1962-9-25 38929 Kern South of Kernville below hot springs 792 Comment
  CAS-BOT-BC364916  Solidago velutina subsp. californica John Thomas Howell 1981-10-14 54649 Sutter Dean Ranch, Sutter Buttes Comment
  CAS-BOT-BC365115  Solidago velutina subsp. californica John Thomas Howell 1924-8-11 620 Plumas 2 miles east of Chester Comment
  CAS-BOT-BC365281  Solidago velutina subsp. californica John Thomas Howell 1970-9-21 47230 Tulare Along Hwy. US 99 just northwest of Tagus 79 Comment
  UC517539  Solidago velutina subsp. californica John Thomas Howell 1933-8-27 11635 Napa Sage Canyon , Sage Canyon (Napa Range) Comment
  CAS-BOT-BC365900  Soliva sessilis John Thomas Howell 1957-5-17 s.n. San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC365858  Soliva sessilis John Thomas Howell 1946-4-18 21653 Marin Ignacio Comment
  CAS-BOT-BC365896  Soliva sessilis John Thomas Howell 1956-5-6 31356 San Francisco Sierra & Missouri Sts., San Francisco Comment
  CAS-BOT-BC374404  Sonchus asper John Thomas Howell 1975-6-15 51130 Plumas Quincy 1036 Comment
  CAS-BOT-BC374679  Sonchus oleraceus John Thomas Howell 1956-6-17 31591 San Francisco Summit ridge of Bayview Hills, San Francisco Comment
  CAS-BOT-BC374575  Sonchus oleraceus John Thomas Howell; Gordon H. True 1967-5-31 42524 Tulare About 4 1/2 miles east-northeast of Pixley. Near E line of area 83 Comment
  RSA38328B  Sorbus californica J. T. Howell 1948-7-29 25173 Fresno Bubbs Creek Canyon. 2835 Comment
  CAS-BOT-BC390187  Spergularia bocconi John Thomas Howell 1957-5-5 32175 San Francisco San Francisco. Sierra & 22nd Sts. Comment
  CAS-BOT-BC390229  Spergularia bocconi John Thomas Howell 1953-5-24 29019 Tuolumne Near Montezuma on road to Chinese Camp 381 Comment
  CDA24129  Spergularia macrotheca J. T. Howell 1944-4-23 19397 Marin Pacific coast; Escalle. 0 Comment
  CAS-BOT-BC390423  Spergularia macrotheca var. macrotheca John Thomas Howell 1956-5-12 31366 San Francisco Marin St., San Francisco Comment
  CAS-BOT-BC390754  Spergularia marina John Thomas Howell 1938-4-10 13742 Alameda Eastern Livermore Valley Comment
  CAS-BOT-BC390970  Spergularia marina John Thomas Howell; Gordon H. True 1978-4-4 52720 Solano Flats bordering Denverton Slough Comment
  CAS-BOT-BC390750  Spergularia marina John Thomas Howell 1955-6-14 30419 Shasta 0.8 mile west of Tower House 396 Comment
  CAS-BOT-BC390555  Spergularia rubra John Thomas Howell 1943-8-7 19169 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC390685  Spergularia rubra John Thomas Howell; Walter Knight; Irja Knight; Gordon True 1967-6-12 1982 Plumas Butterfly Botanical Area and Vicinity. Near barn in valley proper 1036 Comment
  CAS-BOT-BC213204  Sphaeralcea John Thomas Howell 1958-5-23 33241 Inyo Alabama Hills 1463 Comment
  CAS-BOT-BC374770  Sphaeromeria ruthiae John Thomas Howell 1949-8-10 26212 Tulare Upper Soldier Lake 3413 Comment
  CAS-BOT-BC149641  Spiraea douglasii John Thomas Howell 1960-7-18 35583 Plumas Drakesbad 1828 Comment
  CAS-BOT-BC152527  Spiraea splendens John Thomas Howell 1943-7-17 18494 Nevada Boreal Ridge, west side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC391111  Stellaria longipes subsp. longipes John Thomas Howell 1948-7-29 25167 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC391186  Stellaria longipes subsp. longipes John Thomas Howell 1960-7-18 35516 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC391254  Stellaria longipes subsp. longipes John Thomas Howell; Gordon H. True 1966-7-11 41622 Tulare Poison Meadow, Kern Plateau 2286 Comment
  UC1042592  Stellaria longipes var. longipes John Thomas Howell 1950-7-14 26859 Tulare Bakeoven Meadows; Sierra Nevada, South Fork of Kern River 2468 Comment
  CAS-BOT-BC393724  Stellaria media John Thomas Howell 1972-4-25 48714 Mariposa Moist shaded flat at Cascade Falls west of Yosemite Valley 1036 Comment
  RSA293  Stellaria media J. T. Howell 1928-2-7 821 Orange Near the ranch houses, Rancho Santa Ana 152 Comment
  CAS-BOT-BC395086  Stellaria nitens John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53395 Siskiyou Forest Mountain Summit, 6 miles southwest of Yreka on road to Fort Jones 1249 Comment
  CAS-BOT-BC181457  Stellaria obtusa John Thomas Howell; Gordon H. True 1965-7-14 2252 Nevada Fall Creek about 5 miles north of Yuba Gap and just east of Lake Bowman Road 1706 Comment
  CAS-BOT-BC221856  Stenotaphrum secundatum John Thomas Howell 1944-10-1 20766 Marin Fairfax Comment
  CAS-BOT-BC375285  Stephanomeria exigua subsp. carotifera John Thomas Howell 1955-7-8 30596 Monterey 2 miles from San Antonio Mission on road to Santa Lucia Camp 335 Comment
  CAS-BOT-BC323007  Stephanomeria tenuifolia John Thomas Howell 1944-8-8 s.n. Tuolumne Between Elizabeth Lake and Tuolumne Meadows Comment
  CAS-BOT-BC375771  Stephanomeria virgata John Thomas Howell 1940-8-10 16114 Fresno Zigzags east of Kings Canyon, Bubbs Creek Comment
  SEINET10610761  Stipa occidentalis John Thomas Howell, Gordon H. True 1970-7-28 Howell 47040 Tulare Kern Plateau. East side of Big Meadow on loop road south of North Manter Pass Trail. 2377 Comment
  CAS-BOT-BC61169  Streptanthus batrachopus John Thomas Howell 1942-6-21 16994 Marin Carson Ridge. Comment
  UC1106260  Streptanthus batrachopus John Thomas Howell 1941-7-6 16348 Marin between Camp Zeische and Barth's Retreat; Mt. Tamalpais Comment
  UC1177256  Streptanthus batrachopus John Thomas Howell 1946-5-19 21922 Marin Carson Ridge Comment
  CAS-BOT-BC87153  Streptanthus glandulosus subsp. glandulosus John Thomas Howell 1940-5-19 15453 Napa Upper Saint Helena Creek. Comment
  CAS-BOT-BC87232  Streptanthus glandulosus subsp. glandulosus John Thomas Howell 1931-4-19 6436 Sonoma Spring Mountain Road, 7.5 miles west of Saint Helena. Comment
  CAS-BOT-BC87279  Streptanthus glandulosus subsp. secundus John Thomas Howell 1944-5-21 19488 Marin Mount Tamalpais. South side of Phoenix Lake. Comment
  CAS-BOT-BC87829  Streptanthus tortuosus John Thomas Howell; Gordon H. True 1969-6-25 45850 Sierra Sierra Nevada. 3 miles north of Bassetts on road to Gold Lake. 1950 Comment
  CAS-BOT-BC375962  Stylocline John Thomas Howell 1983-4-21 54741 Kern Slope about 1 mile south of Kernville on road to Weldon 807 Comment
  CAS-BOT-BC48054  Styrax redivivus John Thomas Howell 1973-7-9 49700 Butte Feather River Highway near Bear Ranch Creek. 457 Comment
  RSA272  Suaeda moquinii J. T. Howell 1927-7-9 297 San Bernardino Between Deadman s Point and Box S Ranch, Mojave Desert. 915 Comment
  CAS-BOT-BC237045  Symphoricarpos mollis John Thomas Howell 1957-7-28 32824 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC245797  Symphoricarpos rotundifolius John Thomas Howell 1950-7-20 27119 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC245801  Symphoricarpos rotundifolius John Thomas Howell; Gordon H. True 1971-7-13 48340 Tulare Northeaast end of Big Meadow, Kern Plateau, Sierra Nevada 2438 Comment
  CAS-BOT-BC97561  Symphyotrichum ascendens John Thomas Howell 1959-9-25 35020 Plumas Chilcoot 1524 Comment
  CAS-BOT-BC99103  Symphyotrichum chilense John Thomas Howell 1931-9-27 8105 Mendocino Coastal plain 6 miles south of Point Arena Comment
  CAS-BOT-BC99046  Symphyotrichum cusickii John Thomas Howell 1961-9-22 36791 Butte Sierra Nevada - North Fork Feather River at ARch Rock Tunnel Comment
  CAS-BOT-BC98908  Symphyotrichum foliaceum var. parryi John Thomas Howell 1969-8-26 45969 Tulare Sierra Nevada - Mineral King 2377 Comment
  CAS-BOT-BC98942  Symphyotrichum foliaceum var. parryi John Thomas Howell 1939-8-2 14877 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC97955  Symphyotrichum frondosum John Thomas Howell; Gordon H. True 1967-9-18 43779 Tulare Recreation area, north end of Lamont Meadow. Kern Plateau 1706 Comment
  CAS-BOT-BC98556  Symphyotrichum lentum John Thomas Howell 1925-11-27 1564 Solano Green Valley near Cordelia Comment
  CAS-BOT-BC98471  Symphyotrichum spathulatum John Thomas Howell 1951-8-21 28271 Sierra Yuba Pass - Sierra Nevada 2042 Comment
  CAS-BOT-BC98486  Symphyotrichum spathulatum John Thomas Howell 1943-7-25 18817 Placer West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC376636  Syntrichopappus fremontii John Thomas Howell 1962-5-21 37237 Kern East side of Walker Pass 1402 Comment
  CAS-BOT-BC221907  Taeniatherum caput-medusae John Thomas Howell 1954-5-16 29615 El Dorado Shingle Springs 426 Comment
  CAS-BOT-BC221943  Taeniatherum caput-medusae John Thomas Howell 1945-6-18 20997 Lake Kelseyville Comment
  SEINET10598037  Taeniatherum caput-medusae John Thomas Howell 1945-6-18 Howell 20997 Lake Common on open hillside, Kelseyville Comment
  CAS-BOT-BC376851  Taraxacum John Thomas Howell 1960-7-18 35539 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC377004  Taraxacum officinale John Thomas Howell; Gordon H. True 1968-5-12 44236 Tulare Brush Creek Canyon. Kern Plateau 1402 Comment
  RSA538  Tauschia arguta J. T. Howell 1927-6-26 220 Orange Claymine Canyon near Sierra Peak 366 Comment
  RSA537  Tauschia parishii J. T. Howell 1927-7-9 326 San Bernardino Whiskey Canyon, San Bernardino Mtns. 1652 Comment
  CAS-BOT-BC81327  Taxus brevifolia John Thomas Howell 1929-10-5 4449 Sacramento American River Canyon, 1/8 mile below Observation Point Comment
  CAS-BOT-BC447456  Tellima grandiflora John Thomas Howell 1962-6-16 37639 Plumas Lewisia Rock, Feather River North Fork. 640 Comment
  CAS-BOT-BC399700  Thalictrum fendleri John Thomas Howell 1969-8-28 46017 Tulare Mineral King 2377 Comment
  CAS-BOT-BC399923  Thalictrum sparsiflorum John Thomas Howell 1947-8-4 23710 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC77727  Thelypteris nevadensis John Thomas Howell 1936-8-28 12876 Trinity 4 1/2 miles west of Forest Glen Comment
  CAS-BOT-BC197370  Thinopyrum intermedium subsp. barbulatum John Thomas Howell 1978-7-29 53353 Nevada 5 miles north of Truckee on road to Sierraville 1767 Comment
  CAS-BOT-BC88237  Thysanocarpus curvipes John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52762 Calaveras Sierra Nevada. Camp Nine Road northeast of Vallecito. 609 Comment
  CAS-BOT-BC88399  Thysanocarpus curvipes John Thomas Howell 1960-3-26 35190 Kern Sierra Nevada. Kernville. Comment
  CAS-BOT-BC66950  Thysanocarpus laciniatus John Thomas Howell 1933-4-9 10988 Santa Cruz Ano Nuevo Pines. Comment
  CAS-BOT-BC66997  Thysanocarpus laciniatus John Thomas Howell 1930-5-13 5020 Kern 8.5 miles west of summit of Walker Pass. Comment
  RSA223364  Thysanocarpus laciniatus J. T. Howell 1931-3-22 5965 Monterey Stone Canyon, 11 miles E of Salinas Valley. Comment
  CAS-BOT-BC447618  Tolmiea menziesii John Thomas Howell 1943-8-9 19223 Glenn Plaskett Meadows 1828 Comment
  SEINET10471680  Torreya californica John Thomas Howell 1948-5-16 Howell 24304 Marin Near top of Eldridge Grade, Mt. Tamalpais. Comment
  CAS-BOT-BC169214  Toxicodendron diversilobum John Thomas Howell 1964-4-28 40618 Mariposa 2 miles east of Morman Bar - Sierra Nevada 670 Comment
  CAS-BOT-BC172963  Toxicodendron diversilobum John Thomas Howell 1933-4-22 11036 San Benito 1.5 miles s. of Tres Pinos Comment
  GH347276  Toxicodendron diversilobum J. T. Howell 1956-10-21 31915 Unknown San Francisco, summit of Bayview Hills Comment
  CAS-BOT-BC377080  Tragopogon dubius John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49416 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC377089  Tragopogon dubius John Thomas Howell 1974-9-20 50895 Plumas 7 miles from Quincy on road to Blairsden 1097 Comment
  CAS-BOT-BC517419  Triantha occidentalis subsp. occidentalis John Thomas Howell 1958-8-2 34174 Fresno Sierra Nevada, Tent Meadow (lower), Copper Creek Canyon 2377 Comment
  CAS-BOT-BC519554  Triantha occidentalis subsp. occidentalis John Thomas Howell 1945-7-18 s.n. Sonoma Sonoma: Pitkin Marsh Comment
  SEINET13948235 Image available Trichostema ovatum John Thomas Howell 1962-1 38135 Kern Open hills 5 mi NE of Bakersfield; ca 700 ft alt. 213 Comment
  UC517488  Trifolium gracilentum John Thomas Howell 1933-5-14 11249 Contra Costa e St. Mary's College (hills) Comment
  UC1177205  Trifolium variegatum var. melananthum John Thomas Howell 1947-4-23 23064 Marin w Mt. Vision (Drakes Estero) Comment
  JEPS33665  Trifolium willdenovii John Thomas Howell 1925-3-22 803 Alameda Arroyo Mocho Comment
  CAS-BOT-BC451854  Triglochin maritima John Thomas Howell 1944-5-7 19447 Marin Larkspur salt marsh Comment
  CAS-BOT-BC451781  Triglochin maritima John Thomas Howell 1955-6-14 30424 San Luis Obispo 0.8 mile west of Tower House 396 Comment
  CAS-BOT-BC519081  Trillium angustipetalum John Thomas Howell 1923-6-14 57 Mariposa Wawona Valley 1219 Comment
  CAS-BOT-BC519421  Trillium chloropetalum var. giganteum John Thomas Howell 1924-2-29 284 Alameda Wildcat Canyon, Berkeley Hills Comment
  CAS-BOT-BC193575  Trisetum spicatum John Thomas Howell 1948-7-22 24910 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC200219  Trisetum spicatum John Thomas Howell 1944-8-10 20230 Mono North slope of Mt. Dana Comment
  CAS-BOT-BC200317  Trisetum spicatum John Thomas Howell; Gordon H. True 1966-7-11 41705 Tulare Horse Meadow, Kern Plateau 2255 Comment
  POM261498  Trisetum spicatum J. T. Howell 1940-8-1 15786 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC200460  Trisetum wolfii John Thomas Howell 1964-8-11 40956 Mono Meadow below Tioga Lake 2910 Comment
  CAS-BOT-BC524216  Triteleia ixioides subsp. anilina John Thomas Howell 1943-7-17 18475 Nevada West side of Donner Pass near Norden 2133 Comment
  RSA179713  Triteleia laxa J. T. Howell 1930-5-15 5112 Kern Hills near Glenville, Greenhorn Range, alt. 3200 ft. 975 Comment
  CAS-BOT-BC527967  Triteleia peduncularis John Thomas Howell 1947-6-5 s. n. Sonoma Cunninghan Marsh Comment
  CAS-BOT-BC67501  Tropidocarpum gracile John Thomas Howell 1931-3-23 5980 Monterey Poncho Rico Canyon 5 miles east of San Bernardo. Comment
  CAS-BOT-BC73875  Tropidocarpum gracile John Thomas Howell; Gordon H. True 1969-5-14 45754 Tulare Sierra Nevada. Kern Plateau. Cherry Hill Road about 1.5 mile east of Kern River Canyon road, Brush Creek Canyon. 1310 Comment
  CAS-BOT-BC85869  Tsuga mertensiana subsp. grandicona John Thomas Howell 1946-7-19 22529 Fresno Fourth Recess 3078 Comment
  CAS-BOT-BC73928  Turritis glabra John Thomas Howell 1943-8-3 18946 Glenn Plaskett Meadows. 1828 Comment
  CAS-BOT-BC74009  Turritis glabra John Thomas Howell 1960-7-20 35729 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  CAS-BOT-BC74096  Turritis glabra John Thomas Howell 1939-8-6 15088 Siskiyou Spirit Lake, Marble Mountains. 1828 Comment
  CAS-BOT-BC74106  Turritis glabra John Thomas Howell 1930-6-8 5291 Sonoma 8.5 miles north of Bodega Bay. Comment
  CAS-BOT-BC77658  Ulmus pumila John Thomas Howell 1958-5-29 33624 Inyo Bishop 1264 Comment
  CAS-BOT-BC91137  Umbellularia californica John Thomas Howell 1928-2-9 3333 Los Angeles Floor of Santa Anita Canon [Canyon], San Gabriel Mountains. Comment
  CAS-BOT-BC382840  Uropappus lindleyi John Thomas Howell; Gordon H. True 1968-5-14 44438 Tulare Cherry Hill Road, Brush Creek Canyon, Kern Plateau 1219 Comment
  CAS-BOT-BC381861  Uropappus lindleyi John Thomas Howell; Gordon H. True 1971-6-14 47692 Kern Isabella 762 Comment
  CAS-BOT-BC404101  Urtica dioica subsp. holosericea John Thomas Howell 1962-7-7 38152 Kern Kern River Canyon 304 Comment
  CAS-BOT-BC404261  Urtica dioica subsp. holosericea John Thomas Howell; Gordon H. True 1967-7-4 43026 Tulare Fish Creek about 3.5 miles south of Troy Meadow, Kern Plateau 2255 Comment
  UCD111558  Urtica dioica subsp. holosericea John Thomas Howell 1960-7-20 35717 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  CAS-BOT-BC193997  Vaccinium cespitosum John Thomas Howell 1925-7-2 1336 El Dorado Trail to Desolation Valley above Glen Alpine, Lake Tahoe Region Comment
  CAS-BOT-BC199471  Vaccinium parvifolium John Thomas Howell 1930-7-27 5395 Sonoma 1 mile north of Fort Ross Comment
  CAS-BOT-BC193404  Vaccinium shastense subsp. nevadense John Thomas Howell 1954-6-4 29924 Tuolumne Stanislaus River bridge near Twain Harte - Sierra Nevada 1158 Comment
  A363277  Vaccinium uliginosum J. T. Howell 1944-8-14 20465 Unknown Tuolumne Canyon above Glen Aulin Comment
  RSA653  Verbena lasiostachys J. T. Howell 1928-6-30 1028 Ventura Santa Susana Pass. 457 Comment
  UCR89185  Verbena litoralis J. T. Howell 1954-9-5 30055 Amador Mokelumne River Birdge on Hwy 49. Between Jackson and Mokelumne Hill Comment
  JEPS74302  Veronica arvensis John Thomas Howell 1972-4-24 48681 Merced Merced Comment
  RSA40176  Veronica serpyllifolia var. humifusa J. T. Howell 1943-8-9 19232 Glenn Plaskett Meadows. 1829 Comment
  CAS-BOT-BC263961  Viola adunca John Thomas Howell 1944-3-26 19344 Marin Above Ledum Swamp, Inverness Ridge Comment
  CAS-BOT-BC203086  Vitis californica John Thomas Howell 1933-8-27 11628 Napa Sage Canyon, Napa Range Comment
  CAS-BOT-BC198779  Vulpia bromoides John Thomas Howell 1938-6-19 13915 Marin Trockmorton Trail, Mt. Tamalpais Comment
  CAS-BOT-BC198792  Vulpia bromoides John Thomas Howell 1952-4-27 s.n. Santa Barbara San Roque Canyon Comment
  POM237126  Vulpia bromoides J. T. Howell 1945-6-18 21005 Lake Bartlett Mountain, Sawmill Flat. 1220 Comment
  CAS-BOT-BC183086  Vulpia microstachys var. ciliata John Thomas Howell 1954-5-17 29730 El Dorado 1 mile southwest of Garden Valley 609 Comment
  CAS-BOT-BC183170  Vulpia microstachys var. ciliata John Thomas Howell 1964-4-26 40451 Mariposa Just southeast of Mariposa, on the road to Morman Bar 594 Comment
  CAS-BOT-BC183179  Vulpia microstachys var. ciliata John Thomas Howell 1963-5-5 39051 Monterey Mustang Grade, west of Priest Valley 670 Comment
  CAS-BOT-BC183218  Vulpia microstachys var. ciliata John Thomas Howell 1933-4-22 11090 San Benito 6 miles from the Pinnacles on road to San Benito Comment
  CAS-BOT-BC183682  Vulpia microstachys var. ciliata John Thomas Howell 1957-4-13 32022 San Joaquin Corral Hollow Comment
  CAS-BOT-BC183710  Vulpia microstachys var. ciliata John Thomas Howell; Gordon H. True 1968-5-13 44247 Tulare North Meadow Creek, Kern Plateau 1981 Comment
  GH341834  Vulpia microstachys var. ciliata J. T. Howell 1939-4-30 14624 Unknown Walter Springs Comment
  CAS-BOT-BC184163  Vulpia microstachys var. pauciflora John Thomas Howell 1965-4-26 41165 Madera 3 miles south of Oakhurst 914 Comment
  CAS-BOT-BC184247  Vulpia microstachys var. pauciflora John Thomas Howell 1958-5-21 33049 Kern Kern River Canyon near Bodfish 762 Comment
  CAS-BOT-BC184344  Vulpia microstachys var. pauciflora John Thomas Howell 1933-4-30 11194 Marin North side of Mt. Tamalpais Comment
  CAS-BOT-BC184376  Vulpia microstachys var. pauciflora John Thomas Howell 1964-4-29 40668 A Mariposa 4 miles from Mariposa on road to Mt. Bullion 670 Comment
  CAS-BOT-BC184621  Vulpia microstachys var. pauciflora John Thomas Howell; Gordon H. True 1967-5-29 42356 Tulare Midway between Chimney and Lamont meadows, Kern Plateau 1889 Comment
  POM261555  Vulpia microstachys var. pauciflora J. T. Howell 1940-6-2 15579 Mariposa Yosemite Valley. Comment
  CAS-BOT-BC178606  Vulpia myuros subsp. megalura John Thomas Howell; Gordon H. True 1968-5-13 44312 Tulare Cherry Hill Road, Brush Creek Canyon - Kern Plateau, Sierra Nevada 1584 Comment
  CAS-BOT-BC184779  Vulpia myuros subsp. megalura John Thomas Howell 1945-6-20 21107 Lake Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC185658  Vulpia myuros subsp. megalura John Thomas Howell 1963-5-6 39185 Monterey Jolon 298 Comment
  GH361314  Vulpia myuros var. hirsuta J. T. Howell 1948-5-16 24299 Unknown Upper part of Cascade Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC185947  Vulpia octoflora var. octoflora John Thomas Howell 1954-5-19 29905 Mariposa Mt. Bullion 640 Comment
  CAS-BOT-BC383564  Wyethia mollis John Thomas Howell 1960-7-21 35805 Plumas Lassen Volcanic National Park. Slopes near Terminal Geyser 1828 Comment
  CAS-BOT-BC383815  Xanthium strumarium John Thomas Howell 1952-10-28 28891 A Tulare Three Rivers 304 Comment
  UCR142950  Zannichellia palustris J. T. Howell 1932-10-16 10841 San Joaquin Inner Coast Range, Corral Hollow Creek, 5 miles east of Tesla 183 Comment
  CAS-BOT-BC527193  Zigadenus micranthus John Thomas Howell 1940-5-19 15463 Napa Upper St. Helena Creek Comment
  CAS-BOT-BC534336  Zigadenus micranthus John Thomas Howell 1944-7-15 19797 Glenn Canyon of Snow Basin Creek, Comment



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