Search Results — 2000 specimen records retrieved (1538 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/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC78140  Abies X shastensis John Thomas Howell 1950-7-22 27168 Tulare Olancha Peak 2773 Comment
  CAS-BOT-BC73521  Abies concolor John Thomas Howell; Gordon H. True 1970-7-30 47146 Tulare Sierra Nevada, Kern Plateau - southwest end of Big Meadow just east of Cherry Hill Road. 2377 Comment
  CAS-BOT-BC78094  Abies magnifica John Thomas Howell 1960-8-19 36140 Tehama Brokeoff Mt. Trail 2590 Comment
  CAS-BOT-BC383996  Abronia turbinata John Thomas Howell; Gordon H. True 1968-7-17 4418 Mono On route 120 ca. 7 miles east of Hwy. 395 near Mono Craters. Pumice Flat near Mono Craters 2164 Comment
  RSA88570  Acer glabrum var. torreyi J. T. Howell 1951-6-28 27700 Plumas Eureka Peak 1982 Comment
  CAS-BOT-BC331533  Acer macrophyllum John Thomas Howell 1946-9-8 23000 Marin Lagunitas Creek just below Lake Lagunitas. Mt. Tamalpais Comment
  CAS-BOT-BC21690  Achillea millefolium John Thomas Howell 1958-8-13 34400 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC30057  Achillea millefolium John Thomas Howell 1940-8-5 15999 Tulare Between East Lake and Reflection Lake Comment
  CAS-BOT-BC30447  Achillea millefolium John Thomas Howell 1938-7-17 13977 Solano Suisun Marshes at Benecia Junction Comment
  UCD51447  Achnatherum X bloomeri John Thomas Howell 1963-8-20 40185 Inyo Whitney Portal. 2545 Comment
  CAS-BOT-BC218023  Achnatherum latiglume John Thomas Howell 1962-7-9 38394 Kern Near Park Headquarters, Greenhorn Mountains 1798 Comment
  CAS-BOT-BC210621  Achnatherum lemmonii John Thomas Howell; Gordon H. True 1970-6-22 46600 A Kern 1.5 miles west of Greenhorn Summit 1584 Comment
  CAS-BOT-BC210640  Achnatherum lemmonii John Thomas Howell 1967-6-22 42614 Butte Magalia 701 Comment
  CAS-BOT-BC210757  Achnatherum nelsonii John Thomas Howell 1958-7-30 34139 A Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC216383  Achnatherum nevadense John Thomas Howell; Gordon H. True 1971-7-15 48596 Kern Near end of Cherry Hill Road at Bartolas Creek, Kern Plateau 2103 Comment
  CAS-BOT-BC216357  Achnatherum occidentale John Thomas Howell 1944-8-6 20018 Tuolumne Slope N of Tuolumne Meadows Comment
  CAS-BOT-BC216869  Achnatherum occidentale John Thomas Howell 1963-7-11 39829 Nevada 3 miles NE of Truckee 1767 Comment
  CAS-BOT-BC216980  Achnatherum occidentale John Thomas Howell 1951-7-19 27966 Tulare Monarch Lakes Trail 2590 Comment
  CAS-BOT-BC210866  Achnatherum occidentale subsp. californicum John Thomas Howell 1939-8-6 15095 Siskiyou Elk Mt., Marble Mts. Comment
  CAS-BOT-BC218654  Achnatherum occidentale subsp. californicum John Thomas Howell 1949-8-4 26012 Tulare Ridge west of Siberian Pass 3352 Comment
  RSA299148  Achnatherum occidentale subsp. occidentale J. T. Howell 1961-6-21 36700 Plumas Greenville 1098 Comment
  CAS-BOT-BC210938  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1971-7-14 48411 Tulare North Fork of Manter Creek, Kern Plateau 2225 Comment
  UCD54016  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gorden H. True 1970-6-26 46871 Tulare Taylor Meadow, Kern Plateau, Tulare County. 2194 Comment
  RSA299174  Achnatherum speciosum J. T. Howell 1958-5-24 33306 Inyo Whitney Portal road. 1982 Comment
  SEINET7593482 Image available Achnatherum thurberianum John Thomas Howell 1934-1 12273 Modoc Duncan Horse Camp Comment
  CAS-BOT-BC391372  Aconitum columbianum subsp. columbianum John Thomas Howell 1960-8-18 36077 Tehama Near Lassen Volcanic National Park. Bluff Falls 1981 Comment
  CAS-BOT-BC391507  Aconitum columbianum subsp. columbianum John Thomas Howell 1937-7-22 13323 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  UCD128503  Acroptilon repens John Thomas Howell 1952-10-26 28882 Kern Rosamond. 716 Comment
  CAS-BOT-BC29283  Adenocaulon bicolor John Thomas Howell 1924-7-24 480 Mariposa Wawona 1219 Comment
  CAS-BOT-BC132900  Adenostoma fasciculatum John Thomas Howell 1930-12-28 5720 Marin Slopes of Mt. Tamalpais above Mill Valley Comment
  CAS-BOT-BC9055  Aegilops triuncialis John Thomas Howell 1954-5-16 29610 El Dorado Shingle Springs 426 Comment
  RSA98049  Aegilops triuncialis J. T. Howell 1953-7-5 29107 Marin East Peak, Mt. Tamalpais. Comment
  JEPS18568  Ageratina adenophora John Thomas Howell 1930-4-17 4714 Alameda s side Strawberry Canon; Berkeley Hills, Strawberry Canon Comment
  CAS-BOT-BC29362  Ageratina adenophora J. T. Howell 1956-4-22 31251 San Francisco Vacant lot, Polk St. near Filbert St., San Francisco Comment
  RSA26483  Ageratina occidentalis John T. Howell 1940-7-29 s.n. Fresno Between Charlotte Creek and Junction Meadow, Bubbs Creek Comment
  CAS-BOT-BC21385  Agoseris aurantiaca var. aurantiaca John Thomas Howell 1941-8-6 16808 Madera Between Shadow and Garnet Lakes Comment
  CAS-BOT-BC21344  Agoseris grandiflora var. grandiflora John Thomas Howell 1940-5-20 15470 Marin Fairfax Comment
  CAS-BOT-BC22729  Agoseris grandiflora var. grandiflora J. T. Howell 1956-6-10 31510 San Francisco North slope of Bayview Hills, San Francisco Comment
  CAS-BOT-BC15367  Agoseris grandiflora var. leptophylla John Thomas Howell 1955-6-14 30396 Trinity Weaverville 609 Comment
  CAS-BOT-BC22937  Agoseris heterophylla John Thomas Howell 1945-6-19 21060 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC22970  Agoseris heterophylla John Thomas Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's College Comment
  UC1106266  Agoseris heterophylla var. heterophylla J. Thomas Howell 1947-5-4 23125 Marin San Rafael Hills Comment
  RSA97655  Agoseris heterophylla var. heterophylla J. T. Howell 1953-6-15 29093 Monterey Hastings Reservation, Santa Lucia Mountains Comment
  CAS-BOT-BC13131  Agoseris hirsuta John Thomas Howell 1943-6-8 18221 Marin Tiburon Peninsula Comment
  CAS-BOT-BC13371  Agoseris retrorsa J. T. Howell 1944-7-17 19830 Glenn Canyon of Snow Basin Creek Comment
  CAS-BOT-BC13481  Agoseris retrorsa J. T. Howell 1937-7-21 13245 Trinity Big Flat Comment
  CAS-BOT-BC42948  Agoseris retrorsa John Thomas Howell; Gordon H. True 1970-6-26 46825 Tulare True Meadow, Kern Plateau 2225 Comment
  CAS-BOT-BC127568  Agropyron cristatum John Thomas Howell; Gordon H. True 1970-7-27 46935 Tulare Sierra Nevada. Kern Plateau. Forested border of Big Meadow on the east side at Joughin Camp. Near corral. 2377 Comment
  SEINET10506825  Agrostis John Thomas Howell 1947-5-14 Howell 23149 Marin Drakes Estero, WNW of Mount Vision. Restricted to gravelly slope on outcrop of diatomaceous shale of Monterey Series. Type collection. Comment
  HSC8776  Agrostis aristiglumis J. T. Howell 1947-5-14 1411 Marin Drakes Estero, WNW of Mt. Vision, Monterey Series Comment
  SEINET3916093  Agrostis avenacea John Thomas Howell 1957-6-16 32643 San Francisco San Francisco. Third and Davidson streets.; 0 Comment
  CAS-BOT-BC127505  Agrostis blasdalei John Thomas Howell 1947-5-14 23150 Marin Drakes Estero west northwest of Mount Vision. Comment
  RSA126457  Agrostis blasdalei J. T. Howell 1947-5-14 23150 Marin Monterey Series, Drakes Estero, west-northwest of Mt. Vision. Comment
  SEINET10843169  Agrostis diegoensis John Thomas Howell 1945-7-15 Howell s.n. Unknown Camp Lilienthal, amarin Co. Comment
  CAS-BOT-BC127212  Agrostis exarata John Thomas Howell 1943-5-22 18125 Marin Deer Park near Fairfax. Comment
  RSA384954  Agrostis exarata J. T. Howell 1947-8-16 24142 Inyo Big Pine Lakes Trail. 2805 Comment
  UC1177029  Agrostis exarata John Thomas Howell 1943-6-6 Marin railroad grade above Muir Woods Comment
  CAS-BOT-BC139618  Agrostis gigantea John Thomas Howell 1960-7-18 35521 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  CAS-BOT-BC139484  Agrostis hallii John Thomas Howell 1943-5-9 17965 Marin San Rafael Hills. Comment
  CAS-BOT-BC139181  Agrostis idahoensis John Thomas Howell; Gordon H. True 1971-7-14 48392 Tulare Sierra Nevada. Kern Plateau. North Fork of Manter Creek. 2377 Comment
  CAS-BOT-BC139335  Agrostis idahoensis John Thomas Howell 1958-7-27 34026 A Fresno Sierra Nevada. Tehipite Valley, Middle Fork of the Kings River. 1280 Comment
  CAS-BOT-BC139249  Agrostis idahoensis John Thomas Howell 1960-7-23 35956 Plumas Lassen Volcanic National Park. Drakesbad. Near Soda Spring. 1828 Comment
  CAS-BOT-BC139031  Agrostis pallens John Thomas Howell 1943-5-30 18183 Marin Mill Valley. Summit Avenue. Comment
  UCD53205  Agrostis pallens John Thomas Howell 1943-6-10 18236 Napa Hills southwest of St. Helena. Comment
  CAS-BOT-BC138713  Agrostis scabra John Thomas Howell 1960-7-20 35772 Plumas Lassen Volcanic National Park. Boiling Springs Lake. 1798 Comment
  UCD53456  Agrostis stolonifera John Thomas Howell 1960-7-18 35521 Plumas Drakesbad. 1676 Comment
  CAS-BOT-BC138481  Agrostis variabilis John Thomas Howell 1939-8-9 15214 Siskiyou Sky High Valley, Marble Mountains. 1828 Comment
  UC1177036  Agrostis viridis John Thomas Howell 1944-6-25 19641 Marin San Rafael Comment
  CAS-BOT-BC267056  Alisma John Thomas Howell 1961-9-23 36850 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC445440  Alisma triviale John Thomas Howell 1980-9-8 53890 Marin Between Lake Lagunitas picnic area and Bon Tempe Lake Comment
  CAS-BOT-BC131967  Allium John Thomas Howell; R. C. Barneby 1954-5-14 29570 Tehama 9 miles east of Paynes Creek 1005 Comment
  CAS-BOT-BC462962  Allium bisceptrum John Thomas Howell; Gordon H. True 1967-5-29 42413 Tulare near north end of Long Valley, Kern Plateau, Sierra Nevada 2103 Comment
  CAS-BOT-BC466446  Allium campanulatum John Thomas Howell 1942-7-24 17128 Tulare Mineral King Comment
  RSA128605  Allium crispum J. T. Howell 1957-4-29 32102 Fresno East of Priest Valley in western Fresno County. 747 Comment
  CAS-BOT-BC469032  Allium falcifolium John Thomas Howell 1931-4-3 6140 Napa Pope Creek Canyon, 5.5 miles east of Pope Valley, Napa Range Comment
  RSA26408  Allium falcifolium J. T. Howell 1941-4-6 16179 Contra Costa Ridge east of Deer Park, Mt. Diablo Comment
  CAS-BOT-BC472774  Allium praecox John Thomas Howell 1931-4-11 6266 Santa Barbara Near Valley Anchorage, Santa Cruz Island Comment
  SEINET12044784  Allium serratum J. T. Howell 1933-1 11284 Contra Costa E of St. Mary's College Comment
  RSA127054  Allium triquetrum J. T. Howell 1950-4-23 26309 Marin Along Summit Ave. Mill Valley. Comment
  UC1106277  Allium triquetrum John Thomas Howell 1950-4-23 26309 Marin along Summit Ave. Mill Valley, Summit Ave. Comment
  CAS-BOT-BC478113  Allium validum John Thomas Howell; Gordon H. True 1966-7-13 41948 Tulare Pipe Spring on Cherry Hill Road 2377 Comment
  CAS-BOT-BC478114  Allium validum John Thomas Howell; Gordon H. True 1969-8-28 46012 Tulare Mineral King 2377 Comment
  CAS-BOT-BC170937  Alnus rhombifolia John Thomas Howell 1958-7-22 33759 Fresno Simpson Meadow, Middle Fork of the Kings River, Sierra Nevada 1828 Comment
  CAS-BOT-BC138157  Alopecurus aequalis var. aequalis John Thomas Howell 1943-7-19 18586 Placer Summit Valley. Comment
  CAS-BOT-BC138162  Alopecurus aequalis var. aequalis John Thomas Howell 1975-7-23 51388 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC138051  Alopecurus aequalis var. sonomensis John Thomas Howell 1945-5-30 20899 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC137961  Alopecurus saccatus John Thomas Howell 1965-4-25 41082 Madera 7 miles northeast of Madera. Comment
  UC1177021  Alopecurus saccatus John Thomas Howell 1946-5-4 21702 Marin e. of Aurora School (at Sonoma Co. line) Comment
  CAS-BOT-BC18594  Alyssum alyssoides John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-28 53369 Siskiyou Grenada, near the railroad station. 792 Comment
  RSA127364  Amaranthus californicus J. T. Howell 1946-9-8 22998 Marin Lake Lagunitas, Mount Tamalpais Comment
  JEPS17299  Amblyopappus pusillus J. Thomas Howell 1928-5-19 3815 Ventura near n end of Anacapa Island Comment
  CAS-BOT-BC13658  Ambrosia acanthicarpa John Thomas Howell 1967-11-3 44064 Tulare About 4.5 miles ENE of Pixley. 83 Comment
  CAS-BOT-BC61483  Ambrosia chamissonis John Thomas Howell 1929-10-12 4483 San Luis Obispo Ocean Beach, 9 miles n. of Morro Comment
  CAS-BOT-BC55608  Ambrosia confertiflora John Thomas Howell 1956-7-15 s.n. San Francisco Waterfront Street Comment
  CAS-BOT-BC45020  Ambrosia psilostachya John Thomas Howell 1926-9-9 2189 Marin San Rafael Comment
  CAS-BOT-BC273011  Ambrosia salsola John Thomas Howell 1928-1-28 3285 Riverside Thousand Palms, Colorado Desert Comment
  CAS-BOT-BC135650  Amelanchier utahensis John Thomas Howell 1937-7-21 13230 Trinity Big Flat Comment
  CAS-BOT-BC217100  Amelanchier utahensis John Thomas Howell 1934-6-12 12040 Modoc N side of Fandango Valley. Comment
  SD134063  Amphiscirpus nevadensis John Thomas Howell 1964-10-24 41002 Mono Saline strand of Mono Lake near Lee Vining. 2073 Comment
  CAS-BOT-BC222231  Amsinckia John Thomas Howell 1933-3-29 10916 Contra Costa Pittsburg Comment
  CAS-BOT-BC222254  Amsinckia John Thomas Howell 1934-6-16 12220 Lassen Big Valley, 4 miles ne. of Bieber Comment
  CAS-BOT-BC222287  Amsinckia John Thomas Howell 1934-3-25 11776 Sonoma Lakeville Comment
  CAS-BOT-BC54198  Amsinckia menziesii John Thomas Howell 1934-6-16 12211 Modoc Parker Creek, Warner Mountains 1584 Comment
  UC702995  Amsinckia menziesii var. menziesii John Thomas Howell 1941-4-5 16170 Napa about 1 mi sw Calistoga Comment
  CAS-BOT-BC45152  Anaphalis margaritacea John Thomas Howell 1939-7-2 14835 Marin Pirates Cove Comment
  CAS-BOT-BC128554  Androsace septentrionalis John Thomas Howell 1950-7-22 27236 Tulare Summit ridge, Olancha Peak 3698 Comment
  CAS-BOT-BC391748  Anemone John Thomas Howell 1943-7-20 18626 Nevada Castle Peak Comment
  SEINET12087307  Anemone deltoidea J. T. Howell 1939-1 14927 Siskiyou Marble Mountains, Spirit Lake Comment
  CDA39498  Anemopsis californica J. T. Howell 1970-11-9 47547 Kern Sierra Nevada; South Fork Valley, Weldon. Comment
  CAS-BOT-BC45310  Anisocoma acaulis John Thomas Howell 1958-5-25 33351 Inyo Carroll Creek 1676 Comment
  CAS-BOT-BC59166  Antennaria dimorpha John Thomas Howell; Gordon H. True 1970-6-26 46834 Tulare True Meadow 2225 Comment
  CAS-BOT-BC69162  Antennaria dimorpha John Thomas Howell 1928-5-26 3852 Ventura Mt. Pinos near summit 2682 Comment
  CAS-BOT-BC77204  Antennaria microphylla John Thomas Howell 1946-7-14 22338 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC77242  Antennaria microphylla John Thomas Howell 1947-8-5 23795 Inyo Big Pine Lakes. Fifth Lake. 3352 Comment
  CAS-BOT-BC77261  Antennaria microphylla John Thomas Howell 1958-7-22 33733 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC79903  Antennaria microphylla John Thomas Howell 1937-7-21 13177 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC79927  Antennaria microphylla John Thomas Howell 1951-6-28 27718 Plumas Eureka Peak 2255 Comment
  CAS-BOT-BC86950  Antennaria pulchella John Thomas Howell 1942-7-31 17481 Tulare Mt. Kaweah Comment
  CAS-BOT-BC86971  Antennaria pulchella John Thomas Howell 1947-7-25 23672 San Bernardino San Bernardino Mts., Mt. San Gorgonio 3505 Comment
  CAS-BOT-BC84774  Antennaria umbrinella John Thomas Howell 1948-7-22 24862 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  SEINET13943423 Image available Anthriscus neglecta John Thomas Howell 1962-1 37092 Stanislaus San Joaquin River bridge W of Modesto Comment
  CAS-BOT-BC457536  Aphanes occidentalis John Thomas Howell 1957-4-28 32063 Monterey Santa Lucia Mountains; roadside depression 1.6 miles N.W. of summit of Jamesburg road. 640 Comment
  CAS-BOT-BC457542  Aphanes occidentalis J. T. Howell; Walter Knight; Irja Knight; G. H. True 1967-5-7 2228 D. Plumas Butterfly Botanical Area and Vicinity; open flat near Pond Reservoir. 1097 Comment
  CAS-BOT-BC392137  Aquilegia formosa John Thomas Howell 1958-7-23 33811 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC395160  Aquilegia formosa John Thomas Howell 1949-8-3 25972 Tulare Rock Creek 3291 Comment
  CAS-BOT-BC397888  Aquilegia formosa John Thomas Howell 1960-7-21 35850 Plumas Stream bank nw of Willow Lake 1676 Comment
  CAS-BOT-BC405922  Aquilegia pubescens John Thomas Howell 1941-8-9 16894 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC17274  Arabis blepharophylla John Thomas Howell 1946-5-19 21926 Marin Saddle between Big and Little Carson Canyons. Comment
  RSA88489  Arabis holboellii var. pinetorum J. T. Howell 1951-7-19 27949 Tulare Monarch Lakes Trail. Mineral King and vicinity. 2439 Comment
  UC1042594  Arceuthobium americanum John Thomas Howell 1950-7-18 27038 Tulare Bakeoven Meadows Sierra Nevada 2468 Comment
  CAS-BOT-BC407688  Arceuthobium americanum J. T. Howell 1977-8-2 52463 Calaveras just east of Big Meadow on Ebbets Pass Road 1996 Comment
  UCD101928  Arceuthobium campylopodum John Thomas Howell 1962-9-23 38805 Kern Near Tiger Flat, Greenhorn Mountains, Sierra Nevada. 1981 Comment
  CAS-BOT-BC409919  Arceuthobium campylopodum John Thomas Howell; Gordon H. True 1967-7-11 43373 Plumas 2 miles SE of Mt. Hough 1828 Comment
  CAS-BOT-BC410082  Arceuthobium occidentale John Thomas Howell 1955-6-14 30440 Butte near Magalia 731 Comment
  CAS-BOT-BC410090  Arceuthobium occidentale John Thomas Howell 1970-9-26 47488 Kern near Loraine 822 Comment
  A362583  Arctostaphylos J. T. Howell 1930-7-20 5380 Unknown Chaparral-covered slope near Phoenix Lake Comment
  RSA550549  Arctostaphylos canescens J. T. Howell 1976-7-16 51916 Plumas Just east of Bucks Summit on road to Meadow Valley. 1646 Comment
  CAS-BOT-BC23975  Arctostaphylos canescens subsp. canescens John Thomas Howell 1934-3-3 11747 Sonoma Between Fort Ross and Stwearts Point Comment
  RSA193978  Arctostaphylos canescens subsp. canescens J. T. Howell 1930-3-23 4563 Napa Crater Country' near Mt. St. Helena. Comment
  A350167  Arctostaphylos canescens var. sonomensis J. T. Howell 1933-4-2 10943 Unknown Rincon Ridge, near Santa Rosa Comment
  CAS-BOT-BC23603  Arctostaphylos columbiana John Thomas Howell 1934-3-3 11743 Sonoma Between Fort Ross and Stewart's Point Comment
  CAS-BOT-BC23439  Arctostaphylos crustacea John Thomas Howell 1930-4-6 4659 Santa Clara Near summit of Mt. Hamilton on road to San Antonio Valley. Comment
  CAS-BOT-BC23533  Arctostaphylos crustacea John Thomas Howell 1934-3-4 11773 San Francisco Lake Merced Comment
  GH350216  Arctostaphylos crustacea J. T. Howell 1933-3-3 10865 Unknown San Francisco, Lake Merced Comment
  CAS-BOT-BC25142  Arctostaphylos crustacea subsp. crinita John Thomas Howell 1933-4-9 10987 Santa Cruz Ano Nuevo Pines, N. Santa Cruz Co. Comment
  GH350227  Arctostaphylos edmundsii J. T. Howell 1952-3-4 28299 Unknown Hurricane Point, just south of Little Sur River Comment
  CAS-BOT-BC23351  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-3-26 19356 Marin Pines west of Inverness Comment
  CAS-BOT-BC23370  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1955-5-17 30158 Monterey Summit ridge of Junipero Serra Peak, Santa Lucia Mts. 1767 Comment
  CAS-BOT-BC24834  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1944-3-26 19354 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC23121  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1931-5-30 6610 Riverside Santiago Peak, Santa ana Mts. Comment
  CAS-BOT-BC23130  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1954-3-18 29130 Monterey Exposed sandstone ridge, Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC24725  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1931-3-14 5763 Sonoma Raven Ridge near Santa Rosa. Comment
  CAS-BOT-BC46107  Arctostaphylos glandulosa subsp. howellii John Thomas Howell 1930-10-25 5684 Monterey Chaparral, canyon of the Arroyo Seco River, Santa Lucia Mts. Comment
  RSA136765  Arctostaphylos glandulosa var. howellii J. T. Howell 1955-7-7 30542 Monterey On summit ridge of junipero Serra Peak. 1768 Comment
  CAS-BOT-BC27254  Arctostaphylos jepsonii John Thomas Howell 1931-6-8 6683 Mariposa Just S of summit of Chowchilla Mt. Comment
  A350546  Arctostaphylos manzanita J. T. Howell 1933-4-2 10952 Unknown Serpentine Ridge, 2 miles east of Occidental Comment
  A350619  Arctostaphylos manzanita J. T. Howell 1943-8-2 18909 Unknown Just west of Alder Springs Ranger Station 1341 Comment
  CAS-BOT-BC38918  Arctostaphylos manzanita subsp. elegans John Thomas Howell 1930-7-13 5354 Napa Chaparral on the edge of the Crater Country Comment
  CAS-BOT-BC38971  Arctostaphylos manzanita subsp. elegans John Thomas Howell 1931-4-4 6157 Lake St. Helena Creek Canyon, 4 miles south of Middletown Comment
  CAS-BOT-BC24340  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1976-4-28 51616 Mendocino At Eel River bridge n. of Potter Valley. 457 Comment
  CAS-BOT-BC38656  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1926-6-13 2018 Stanislaus Knight's Ferry 76 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-BC38486  Arctostaphylos mewukka subsp. truei John Thomas Howell 1966-7-26 42005 Plumas Injun Jim Campground at confluence of Granite Creek and North Fork of Feather River. 609 Comment
  CAS-BOT-BC38529  Arctostaphylos mewukka subsp. truei John Thomas Howell 1975-6-15 51110 Butte Paradise. Skyway just ne. of Billie Rd. 609 Comment
  CAS-BOT-BC38615  Arctostaphylos mewukka subsp. truei John Thomas Howell 1959-9-21 34779 Plumas N. Fork Feather River near Belden 701 Comment
  CAS-BOT-BC40140  Arctostaphylos montereyensis John Thomas Howell 1965-6-15 41364 Monterey Near the Monterey Airport on Salinas road about 4 miles east of Monterey. Comment
  CAS-BOT-BC45618  Arctostaphylos montereyensis John Thomas Howell 1965-6-15 41363 Monterey Near Monterey Airport on Salinas rd. abou 4 mi. e. of Monterey. Comment
  CAS-BOT-BC45460  Arctostaphylos nevadensis John Thomas Howell; Gordon H. True 1968-6-9 44520 Nevada South of Donner Summit near Norden. 2194 Comment
  CAS-BOT-BC45915  Arctostaphylos nevadensis John Thomas Howell 1958-8-14 34406 Madera Near Isberg Lake 2987 Comment
  SEINET11977804  Arctostaphylos nevadensis T. J. Howell 1880-1 s.n. Unknown Mount Hood Comment
  CAS-BOT-BC44461  Arctostaphylos patula John Thomas Howell; Gordon H. True 1967-7-4 42994 Tulare 2 miles south of Troy Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC46664  Arctostaphylos patula John Thomas Howell 1925-5-29 1112 El Dorado Emerald Bay Camp, Lake Tahoe. 1889 Comment
  GH362263  Arctostaphylos tomentosa J. T. Howell 1933-4-9 10987 Unknown Ano Nuevo pines Comment
  CAS-BOT-BC43953  Arctostaphylos tomentosa subsp. tomentosa John Thomas Howell 1966-4-14 41481 Monterey Deer Flat Park, Monterey Comment
  GH362173  Arctostaphylos truei J. T. Howell 1976-4-2 51571 Unknown Injun Jim Campground, North Feather River 609 Comment
  UCD51944  Arctostaphylos truei John Thomas Howell 1975-6-15 51094 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  POM273095  Arctostaphylos virgata J. T. Howell 1947-1-12 s.n. Marin Above Muir Woods, south side of Mt. Tamalpais. Comment
  UCD52812  Arctostaphylos viscida John Thomas Howell; Lowell Ahart 1976-4-1 51540 Butte In foothill woodland south of Cherokee on road to Oregon City, Butte Co. Comment
  CAS-BOT-BC46905  Arctostaphylos viscida subsp. mariposa John Thomas Howell 1930-5-14 5071 Kern east slope of the Greenhorn Range 1493 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-BC47378  Arctostaphylos viscida subsp. viscida John Thomas Howell 1975-6-15 51098 Butte about 2 miles from Paradise on Skyway to Chico 396 Comment
  CAS-BOT-BC48210  Arctostaphylos viscida subsp. viscida John Thomas Howell; Catherine Best 1983-4-19 54716 Tulare Kern River Canyon - Limestone Campground above Road's End. 1097 Comment
  CAS-BOT-BC48237  Arctostaphylos viscida subsp. viscida John Thomas Howell 1931-10-31 8166 El Dorado American Flat Comment
  CAS-BOT-BC48270  Arctostaphylos viscida subsp. viscida John Thomas Howell 1930-5-14 5081 Kern East slope of the Greenhorn Range 1600 Comment
  CAS-BOT-BC384755  Arenaria serpyllifolia var. serpyllifolia John Thomas Howell 1937-7-23 13351 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC401638  Argemone munita subsp. argentea John Thomas Howell; Gordon H. True 1966-7-10 41601 Tulare Kern River Canyon at Roads End 1066 Comment
  CAS-BOT-BC401787  Argemone munita subsp. rotundata John Thomas Howell 1973-7-10 49789 Lassen 3 miles west of Susanville 1371 Comment
  CAS-BOT-BC82643  Arnica lanceolata subsp. prima John Thomas Howell 1942-7-24 17066 Tulare Mineral King Comment
  POM303630  Arnica mollis J. T. Howell 1943-7-20 18596 Nevada Willow Valley just west of Castle Peak Comment
  RSA54119  Arnica parryi subsp. sonnei J. T. Howell 1946-8-31 22933 El Dorado Gilmore Lake. 2561 Comment
  CAS-BOT-BC85004  Artemisia arbuscula subsp. arbuscula John Thomas Howell 1934-7-6 12455 Lassen Harvey Valley Comment
  CAS-BOT-BC90249  Artemisia californica John Thomas Howell 1927-10-8 3136 Ventura near pt. Mugu Comment
  CAS-BOT-BC90258  Artemisia douglasiana John Thomas Howell 1930-9-28 5514 San Joaquin Holt Comment
  CAS-BOT-BC90416  Artemisia douglasiana John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-7-10 2217 Plumas Mouth of Butterfly Creek 883 Comment
  CAS-BOT-BC93967  Artemisia douglasiana John Thomas Howell 1936-8-24 12759 Trinity Summit of Scott Mts. n. of Carrville Comment
  CAS-BOT-BC90571  Artemisia dracunculus John Thomas Howell 1977-8-11 52668 Plumas Canyon of Little Last Chance Creek between Chilcoot and Frenchmans Reservoir 1676 Comment
  CAS-BOT-BC90665  Artemisia ludoviciana subsp. incompta John Thomas Howell 1947-8-5 23796 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC90737  Artemisia ludoviciana subsp. incompta John Thomas Howell 1950-7-24 27273 Tulare Monache Creek S. Fk. 2743 Comment
  CAS-BOT-BC97183  Artemisia rothrockii John Thomas Howell 1950-7-15 26898 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  UC1042365  Artemisia tridentata John Thomas Howell 1950-11-9 27484 Los Angeles valley flat 3 mi sw Newhall Comment
  CAS-BOT-BC447708  Aruncus dioicus var. vulgaris John Thomas Howell 1939-8-8 15137 Siskiyou Between Sky High Valley and Marble Valley, Marble Mts. Comment
  CAS-BOT-BC400497  Asarum caudatum John Thomas Howell 1925-3-1 767 Alameda San Leandro Canon [Canyon], Oakland Hills Comment
  CAS-BOT-BC478539  Asparagus officinalis John Thomas Howell 1963-8-6 40062 Monterey King City Comment
  CAS-BOT-BC478835  Asparagus officinalis John Thomas Howell 1971-6-25 48119 Merced On Merced-Gustine road 1 mile south of Stevinson 27 Comment
  UCD138669  Asparagus officinalis subsp. officinalis John Thomas Howell 1960-5-1 35218 Stanislaus Oakdale. Comment
  CAS-BOT-BC65775  Aspidotis californica John Thomas Howell 1930-3-29 4602 San Benito the Pinnacles Comment
  RSA782  Aster subulatus var. ligulatus J. T. Howell 1927-10-29 775 Orange Bryant Ranch near Long Beach. 15 Comment
  CAS-BOT-BC177436  Astragalus andersonii John Thomas Howell 1962-6-19 37890 Lassen 3 miles south of Hallelujah Junction 1524 Comment
  RSA108608  Astragalus bolanderi J. T. Howell 1942-8-8 17858 Tulare South side Farewell Gap. Comment
  RSA415822  Astragalus gambelianus J. T. Howell 1931-4-19 6433 Sonoma Spring Mountain Road, 7.5 miles from St. Helena. Comment
  UCD104786  Astragalus gambelianus John Thomas Howell 1965-4-25 41063 Madera 5 miles northeast of Madera. Comment
  CAS-BOT-BC187154  Astragalus lentiginosus var. chartaceus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49230 Lassen On Highway 395, 7 miles southeast of Milford 1280 Comment
  RSA383  Astragalus lentiginosus var. sierrae J. T. Howell 1927-6-10 368 San Bernardino Big Bear, San Bernardino Mts. 2042 Comment
  CAS-BOT-BC27682  Astragalus monoensis John Thomas Howell 1938-8-10 14500 Mono Near Crestview Comment
  CAS-BOT-BC177964  Astragalus nuttallii var. virgatus John Thomas Howell 1956-9-9 31856 San Francisco SE end of Lake Merced, San Francisco Comment
  CAS-BOT-BC186566  Astragalus nuttallii var. virgatus John Thomas Howell 1946-5-16 21868 Marin Angel Island, se. side Comment
  CAS-BOT-BC193069  Astragalus purshii var. tinctus John Thomas Howell 1928-5-26 3834 Ventura Chula Vista Camp, Mt. Pinos Comment
  SEINET10775829  Astragalus pycnostachyus John Thomas Howell 1945-6-30 Howell 21253 Marin Stinson Beach. Comment
  CAS-BOT-BC194018  Astragalus trichopodus var. lonchus John Thomas Howell 1931-4-11 6260 Santa Barbara Near Valley Anchorage, Santa Cruz Island Comment
  RSA380  Astragalus trichopodus var. lonchus J. T. Howell 1928-2-7 815 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC17606  Athysanus pusillus John Thomas Howell; Gordon H. True 1968-5-12 44215 Tulare Sierra Nevada. Kern Plateau. Brush Creek Canyon. 1402 Comment
  CAS-BOT-BC168629  Atriplex John Thomas Howell; Gordon H. True 1967-9-21 44001 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC170196  Atriplex canescens subsp. canescens John Thomas Howell 1927-10-22 3162 Orange In hills on n. side of Santa Ana Canyon. 152 Comment
  CAS-BOT-BC168531  Atriplex confertifolia John Thomas Howell 1930-6-28 5324 San Joaquin Banta Junction, about 1 mile from Banta Comment
  CAS-BOT-BC168587  Atriplex cordulata John Thomas Howell 1967-11-4 44080 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC168599  Atriplex cordulata John Thomas Howell; Gordon H. True 1967-9-21 44007 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  UCD97408  Atriplex fruticulosa John Thomas Howell 1972-6-29 48917 Contra Costa on Bron Hot Springs Road southeast of Byron. Comment
  CAS-BOT-BC168461  Atriplex parishii var. subtilis John Thomas Howell; Gordon H. True 1967-8-10 43723 Tulare About 4 1/2 miles east-northeast of Pixley. From northern 1/3 and central areas 83 Comment
  CAS-BOT-BC244848  Atriplex pusilla John Thomas Howell 1938-8-8 14381 Mono Long Valley Comment
  CAS-BOT-BC176620  Atriplex serenana var. serenana John Thomas Howell 1963-8-20 40113 Kern South Fork Valley about 2 miles northeast of Weldon 807 Comment
  CAS-BOT-BC176754  Atriplex serenana var. serenana John Thomas Howell 1927-7-5 2650 Orange Along road, Santa Ana River bottom, Santa Ana [Canon] Canyon 152 Comment
  RSA215969  Atriplex subspicata J. T. Howell 1956-9-29 31889 San Francisco Golden Gate Park east of Academy buildings, San Francisco. Comment
  POM251773  Atriplex truncata J. T. Howell 1938-8-8 14391 Mono Long Valley Comment
  RSA22195  Atriplex truncata J. T. Howell 1938-8-8 14394 Mono Long Valley Comment
  UCD97851  Atriplex truncata John Thomas Howell 1959-9-25 35017 Plumas 5 miles east of Beckwourth, Sierra Valley. 1493 Comment
  SEINET11690141  Avena barbata J. T. Howell, Knight, W.; Knight, I. 1987-1 6231 Sonoma Todd Road Preserve 24 Comment
  CAS-BOT-BC145884  Avena fatua John Thomas Howell 1962-6-15 37530 Butte Sierra Nevada. Magalia. 731 Comment
  CAS-BOT-BC145948  Avena fatua John Thomas Howell 1964-4-26 40457 Mariposa Sierra Nevada. Just southeast of Mariposa on the road to Morman Bar. 594 Comment
  CAS-BOT-BC145735  Avena sativa John Thomas Howell 1964-6-29 40786 San Luis Obispo Cambria. Comment
  CAS-BOT-BC68356  Azolla filiculoides John Thomas Howell 1963-6-21 39441 Monterey Along Highway US 101, Prunedale Comment
  CAS-BOT-BC66241  Azolla mexicana John Thomas Howell 1959-9-21 34825 Plumas Crescent Mills 1066 Comment
  RSA215927  Baccharis pilularis J. T. Howell 1957-6-11 32589 San Francisco North slope of Lone Mountain Comment
Read comments
Dec 21 2011
  JEPS21280  Baccharis salicina John Thomas Howell 1927-10-22 3166 Orange Rancho Santa Ana Santa Ana River bottom 152 Comment
  CAS-BOT-BC100039  Balsamorhiza deltoidea John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1968-6-11 2367 Plumas Butterfly Botanical Area. Confluence of Spanish Creek & Butterfly Creek Comment
  CAS-BOT-BC16466  Barbarea orthoceras John Thomas Howell 1923-6-22 75 Mariposa Stella Lake, Wawona. 1219 Comment
  CAS-BOT-BC16561  Barbarea orthoceras John Thomas Howell 1967-6-23 42684 Plumas Sierra Nevada. Canyon of Butterfly Creek. 1036 Comment
  JEPS59811  Bassia hyssopifolia J. T. Howell 1926-6-20 2042 Merced 6 mi ne Los Banos; ne <of> Los Banos Comment
  CAS-BOT-BC106422  Bebbia juncea var. aspera John Thomas Howell 1928-4-1 3613 Inyo 4 miles s. of Bradbury Well, Black Mts. Comment
  CAS-BOT-BC145813  Beckmannia syzigachne John Thomas Howell 1961-9-23 36848 Plumas Sierra Nevada. Indian Valley. 1082 Comment
  CAS-BOT-BC145814  Beckmannia syzigachne John Thomas Howell 1961-9-25 36938 Plumas Sierra Nevada. Feather River bed, Portola. 1478 Comment
  CAS-BOT-BC100238  Benitoa occidentalis John Thomas Howell 1933-8-17 11549 San Benito Near Hernandez Comment
  UCD95050  Berberis aquifolium var. dictyota John Thomas Howell 1976-4-29 51622 Lake High Valley Road E of Clear Lake. 1005 Comment
  CAS-BOT-BC76004  Berberis pumila John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53389 Siskiyou Forest Mountain Summit, 6 miles southwest of Yreka on road to Fort Jones. 1249 Comment
  CAS-BOT-BC102162  Bidens John Thomas Howell 1959-9-21 34816 Plumas Sand bars of Indian Creek 914 Comment
  CAS-BOT-BC102076  Bidens cernua John Thomas Howell 1951-8-20 28204 Plumas Indian Valley 1066 Comment
  CAS-BOT-BC413085  Bistorta bistortoides John Thomas Howell 1960-8-21 36299 Tehama Near Lassen Volcanic National Park. Bluff Falls 1981 Comment
  CAS-BOT-BC413096  Bistorta bistortoides John Thomas Howell; Gordon H. True 1970-7-30 47155 Tulare Southwest end of Big Meadow just east of Cherry Hill Road. Kern Plateau 2377 Comment
  CAS-BOT-BC27856  Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Pt. Reyes Peninsula above McClure Beach Comment
  SEINET3859610 Image available Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Point Reyes Peninsula above McClure Beach.; 0 Comment
  CAS-BOT-BC100329  Blepharizonia plumosa John Thomas Howell 1932-10-16 10839 Alameda 1.5 miles west of Tesla Comment
  CAS-BOT-BC15799  Boechera acutina John Thomas Howell 1937-7-26 13551 Siskiyou Caribou Gulch. Comment
  CAS-BOT-BC15875  Boechera arcuata John Thomas Howell 1964-4-27 40515 Mariposa Sierra Nevada. El Portal. 640 Comment
  CAS-BOT-BC16280  Boechera howellii John Thomas Howell 1960-7-20 35758 Plumas Lassen Volcanic National Park. Boiling Springs Lake. 1798 Comment
  CAS-BOT-BC16296  Boechera howellii John Thomas Howell 1946-7-20 22593 Fresno Unglaciated ridge south of Mono Rock. 3596 Comment
  CAS-BOT-BC16324  Boechera howellii John Thomas Howell 1946-7-26 22733 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC13924  Boechera lemmonii John Thomas Howell 1947-8-10 23975 Inyo Big Pine Lakes. Near Sam Mack Lake. 3657 Comment
  CAS-BOT-BC14080  Boechera pauciflora John Thomas Howell 1948-7-29 25148 Fresno Bubbs Creek Canyon in vicinity of Vidette Medows. 3048 Comment
  CAS-BOT-BC14362  Boechera platysperma John Thomas Howell 1941-7-31 16581 Madera Agnew Pass. Comment
  CAS-BOT-BC14420  Boechera platysperma John Thomas Howell 1960-8-18 36093 Tehama Lassen Volcanic National Park. Sulphur Works Entrance Station. 2011 Comment
  CAS-BOT-BC14554  Boechera pulchra John Thomas Howell 1958-5-26 33440 Inyo Sierra Nevada. Onion Valley road. 2072 Comment
  CAS-BOT-BC14619  Boechera pygmaea John Thomas Howell 1949-7-22 25570 Tulare Rock Creek. 3169 Comment
  CAS-BOT-BC14679  Boechera rectissima John Thomas Howell; Gordon H. True 1970-6-25 46793 Tulare Sierra Nevada. Kern Plateau. East branch of Salmon Creek, Big Meadow to Sirretta Meadows. 2590 Comment
  CAS-BOT-BC25412  Boechera retrofracta John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54188 Plumas Sierra Nevada. Rush Creek. 1402 Comment
  CAS-BOT-BC25763  Boechera stricta John Thomas Howell 1940-7-31 15757 Tulare East Lake. 2926 Comment
  CAS-BOT-BC25900  Boechera suffrutescens John Thomas Howell 1934-7-10 12537 Lassen Between Harvey Valley and Patterson Flats. Comment
  RSA512853  Boisduvalia glabella J. T. Howell 1961-9-24 36903 Plumas Sierra Nevada: Feather River bed southwest of Beckworth. 1488 Comment
  CAS-BOT-BC28248  Bolboschoenus glaucus John Thomas Howell 1955-9-6 30906 Glenn Low wet place along road, 3 mi W of Butte City. Comment
  CAS-BOT-BC145418  Brachypodium distachyon John Thomas Howell 1949-6-7 25340 Marin Chileno Valley. Comment
  CAS-BOT-BC145423  Brachypodium distachyon John Thomas Howell 1948-5-31 24327 Marin Common Devils Gulch near Camp Taylor. Comment
  CAS-BOT-BC36779  Brassica rapa John Thomas Howell 1956-6-17 31585 San Francisco San Francisco. Summit ridge of Bayview Hills. Comment
  CAS-BOT-BC100490  Brickellia californica John Thomas Howell 1973-10-31 50272 Tulare Middle Fork of Kaweah River 609 Comment
  CAS-BOT-BC106280  Brickellia californica John Thomas Howell 1940-8-11 16147 Fresno Kings River Canyon at Horseshoe Bend Comment
  CAS-BOT-BC100509  Brickellia californica John Thomas Howell 1973-11-2 50318 Ventura just north of Pine Mt. Summit on Maricopa Road 1371 Comment
  CAS-BOT-BC127692  Brickellia greenei John Thomas Howell 1936-8-26 12832 Trinity Trinity River canyon near Eagle Creek Comment
  CAS-BOT-BC134098  Brickellia microphylla var. microphylla John Thomas Howell; Gordon H. True 1969-5-14 45765 Tulare Marble outcrop on wall of Kern River Canyon east of Limestone Forest Service camp 1127 Comment
  POM204032  Briza minor J. T. Howell 1934-3-25 367 Sonoma Petaluma Comment
  SEINET10533793  Brodiaea elegans John Thomas Howell 1943-8-4 Howell 19049 Glenn Summit ridge north of Black Butte, Calif. Comment
  CAS-BOT-BC484559  Brodiaea minor John Thomas Howell 1962-6-15 37456 Butte Magalia 731 Comment
  CAS-BOT-BC484560  Brodiaea minor John Thomas Howell 1955-6-14 30437 Butte Magalia 731 Comment
  CAS-BOT-BC484593  Brodiaea purdyi John Thomas Howell 1955-7-20 30866 Plumas Mohawk 1371 Comment
  UCD57606  Bromus arenarius John Thomas Howell 1962-7-8 38324 Kern Greenhorn Mountains. Sierra Nevada. 1.5 miles southeast of Summit. 1524 Comment
  CAS-BOT-BC144292  Bromus arizonicus John Thomas Howell 1967-4-7 42060 Kern Mojave. 838 Comment
  RSA118079  Bromus carinatus J. T. Howell 1955-5-20 30210 Monterey Soledad Comment
  CAS-BOT-BC149208  Bromus carinatus var. carinatus John Thomas Howell 1944-5-21 19489 Marin Mount Tamalpais. West end of Phoenix Lake. Comment
  CAS-BOT-BC149236  Bromus carinatus var. carinatus John Thomas Howell 1929-5-26 4239 Mendocino Open of Mendocino coastal plain, Fort Bragg. 15 Comment
  CAS-BOT-BC149318  Bromus carinatus var. carinatus John Thomas Howell 1973-7-10 49751 Plumas Sierra Nevada. Near Greenville. 1097 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-BC148414  Bromus carinatus var. marginatus John Thomas Howell 1944-8-5 19956 Tuolumne Tuolumne Meadows. Near Parsons Lodge. Comment
  CAS-BOT-BC148824  Bromus carinatus var. marginatus John Thomas Howell; Gordon H. True 1970-7-28 46949 Tulare Sierra Nevada. Kern Plateau. West side of Big Meadow just south of Pipe Spring. 2377 Comment
  CAS-BOT-BC148847  Bromus carinatus var. marginatus John Thomas Howell 1960-8-18 36095 Tehama Lassen Volcanic National Park. Sulphur Works Checking Station. 2011 Comment
  CAS-BOT-BC148915  Bromus carinatus var. marginatus John Thomas Howell 1958-8-14 34443 Madera Sierra Nevada. Northeast of Sadler Lake. East Fork of Granite Creek. 3200 Comment
  UCD59113  Bromus carinatus var. marginatus John Thomas Howell 1960-7-23 35932 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  CAS-BOT-BC156190  Bromus catharticus John Thomas Howell 1956-4-28 31299 San Francisco San Francisco. Lake Merced. Comment
  CAS-BOT-BC156243  Bromus catharticus John Thomas Howell 1967-4-7 42061 Kern Mojave. 838 Comment
  CAS-BOT-BC156244  Bromus catharticus John Thomas Howell 1957-6-24 32709 Kern Tehachapi. 1209 Comment
  CAS-BOT-BC156258  Bromus catharticus John Thomas Howell 1957-6-24 32742 Inyo Near Roadside drinking fountain, 10 miles south of Olancha. Comment
  CAS-BOT-BC156285  Bromus catharticus John Thomas Howell 1964-4-29 40658 Mariposa Sierra Nevada. Mariposa. 609 Comment
  RSA137130  Bromus catharticus J. T. Howell 1957-6-24 32709 Kern Tehachapi 1210 Comment
  UCD58383  Bromus catharticus John Thomas Howell 1956-3-11 30923 Orange Yorba Linda. Comment
  UCD58390  Bromus catharticus John Thomas Howell 1956-3-10 30919 Ventura Ventura. Thompson Blvd. and Chrisman Ave. Comment
  CAS-BOT-BC155798  Bromus diandrus John Thomas Howell; Gordon H. True 1968-6-10 44547 Plumas Sierra Nevada. Quincy. 1036 Comment
  CAS-BOT-BC156001  Bromus diandrus John Thomas Howell 1962-6-17 37689 Plumas Sierra Nevada. Butterfly Valley. 1036 Comment
  CAS-BOT-BC156059  Bromus diandrus John Thomas Howell 1958-7-26 33965 Fresno Sierra Nevada. Tehipite Valley, Middle Fork of the Kings RIver. 1280 Comment
  CAS-BOT-BC156032  Bromus diandrus John Thomas Howell 1957-4-13 32021 Alameda Livermore. Comment
  CAS-BOT-BC155604  Bromus grandis John Thomas Howell 1960-6-6 35330 Fresno Sierra Nevada. Kings Canyon Road 4.3 miles west of Horseshoe Boulevard. 1097 Comment
  CAS-BOT-BC155535  Bromus hallii John Thomas Howell; Gordon H. True 1970-6-22 46599 Kern Sierra Nevada. 1.5 mile west of Greenhorn Summit on road to Glenville. 1584 Comment
  CAS-BOT-BC155540  Bromus hallii John Thomas Howell 1940-8-9 16079 Fresno Between Vidette Meadow and Bullfrog Lake. Comment
  CAS-BOT-BC155211  Bromus hordeaceus John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53969 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-BC155465  Bromus hordeaceus John Thomas Howell 1969-4-21 45525 Amador Sierra Nevada. Jackson. 365 Comment
  CAS-BOT-BC155346  Bromus japonicus John Thomas Howell 1977-6-24 52417 Plumas Sierra Nevada. Near confluence of Spanish and Indian Creeks. 929 Comment
  CAS-BOT-BC162275  Bromus madritensis John Thomas Howell 1954-5-8 29214 A Tulare Sierra Nevada. Tule River Canyon, 5 miles above Springville. 548 Comment
  CAS-BOT-BC162331  Bromus madritensis John Thomas Howell 1944-4-16 19390 Marin Mount Tamalpais. Corte Madera Ridge. Comment
  CAS-BOT-BC162348  Bromus madritensis John Thomas Howell; Gordon H. True 1971-6-15 47813 Kern Sierra Nevada. Flying Dutchman Creek canyon on Havilah Mount Breckenridge Road. 1249 Comment
  SEINET891647 Image available Bromus maritimus John Thomas Howell 1957-1 32427 Unknown North base of Lone Mountain, San Francisco. Comment
  CAS-BOT-BC162143  Bromus orcuttianus John Thomas Howell 1926-7-20 2088 Plumas Near Prattville. 1463 Comment
  CAS-BOT-BC162144  Bromus orcuttianus John Thomas Howell 1968-6-11 2368 Plumas Sierra Nevada. Butterfly Botanical Area. Confluence of Spanish Creek & Butterfly Creeek. 883 Comment
  CAS-BOT-BC162207  Bromus orcuttianus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54081 Yuba Sierra Nevada. About 2 miles northeast of Dobbins on Oregon Hill Road. 701 Comment
  CAS-BOT-BC161857  Bromus rubens John Thomas Howell 1950-6-11 26626 Marin Mount Tamalpais. Bootjack. Comment
  CAS-BOT-BC161925  Bromus rubens John Thomas Howell 1950-7-12 26671 Inyo Sage Flat to Olancha Pass. 1981 Comment
  RSA224272  Bromus stamineus J. T. Howell 1956-4-22 31282 San Francisco Embarcadero at Vallejo St. Comment
  SEINET10605894  Bromus stamineus John Thomas Howell 1957-5-5 Howell 32170 San Francisco 22nd and Indiana waste. Comment
  CAS-BOT-BC161613  Bromus sterilis John Thomas Howell 1962-6-15 37493 Butte Sierra Nevada. Magalia. 731 Comment
  NY664630  Bromus tectorum J. T. Howell 1944-5-28 19514 Marin Between Manzanita and Almonte Comment
  SBBG115908  Bromus tectorum J. T. Howell 1960-6-8 35462 Fresno ca. 2 mi W of Sequoia Lake 1524 Comment
  RSA118081  Bromus tectorum var. glabratus J. T. Howell 1955-5-29 30255 Marin near Mountain Theater, Mt. Tamalpias. Comment
  UCD114951  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin Above high tide line, Muir Beach. Comment
  CAS-BOT-BC185461  Calamagrostis canadensis John Thomas Howell 1960-8-18 36102 Tehama Lassen Volcanic National Park. Sulphur Works Checking Station. 2011 Comment
  CAS-BOT-BC185489  Calamagrostis canadensis John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54528 Inyo Sierra Nevada. Mosquito Flat Campground, Rock Creek road to Rock Creek Lake Basin. 3093 Comment
  GH341548  Calamagrostis canadensis J. T. Howell 1941-8-6 16801 Unknown Between Shadow and Garnet lakes, Madera Co. Comment
  POM364253  Calamagrostis canadensis J. T. Howell 1947-8-5 23775 Inyo Fifth Lake, Big Pine Lakes. 3354 Comment
  CAS-BOT-BC185243  Calamagrostis koelerioides John Thomas Howell 1943-8-10 19270 Glenn Black Butte. Comment
  SEINET10521058  Calamagrostis koelerioides John Thomas Howell 1949-6-26 Howell 25352 A Marin First rail north of East Peak. Mt. Tamalpais. Comment
  CAS-BOT-BC185175  Calamagrostis nutkaensis John Thomas Howell 1943-6-13 18229 Marin Sausalito Hills. Comment
  CAS-BOT-BC185107  Calamagrostis ophitidis John Thomas Howell 1941-5-25 16207 Marin Arturo Trail, Mount Tamalpais. Comment
  CAS-BOT-BC185059  Calamagrostis purpurascens John Thomas Howell 1949-8-9 26189 Tulare Cirque Peak. 3733 Comment
  CAS-BOT-BC185060  Calamagrostis purpurascens John Thomas Howell 1942-7-31 17472 Tulare Mount Kaweah. 3505 Comment
  GH341595  Calamagrostis purpurascens J. T. Howell 1942-8-3 17630 Unknown Kaweah Gap Comment
  CAS-BOT-BC438462  Calandrinia ciliata John Thomas Howell 1963-5-6 39102 Monterey Santa Lucia Mountains. 4 miles south of King City on road to Jolon 121 Comment
  CAS-BOT-BC438483  Calandrinia ciliata John Thomas Howell 1951-6-28 27668 Plumas Jamison Creek 1584 Comment
  CAS-BOT-BC167317  California macrophylla John Thomas Howell 1931-3-29 6026 San Benito 11 miles from Hernandez on road to San Benito Comment
  CAS-BOT-BC112306  Calliscirpus brachythrix John Thomas Howell 1948-7-22 24871 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  UCD132882  Calocedrus decurrens John Thomas Howell; Gordon H. True 1970-5-28 5356 Nevada Marsh Road, north side of Harmony Ridge, ca. 5 miles east of Nevada City. 1036 Comment
  RSA114  Calochortus invenustus J. T. Howell 1927-7-10 355 San Bernardino Big Bear, San Bernardino Mountains. 1828 Comment
  CAS-BOT-BC487885  Calochortus invenustus John Thomas Howell; Gordon H. True 1967-8-9 43651 Tulare 3 miles north of Blackrock Guard Station on Monache Jeep Trail, Kern Plateau, Sierra Nevada 2621 Comment
  CAS-BOT-BC490170  Calochortus leichtlinii John Thomas Howell 1943-7-18 18529 Nevada Castle Peak Comment
  CAS-BOT-BC494066  Calochortus venustus John Thomas Howell 1930-5-13 5055 Kern Rocky wash, Kern Canyon, 7miles above Kernville 844 Comment
  RSA998  Calochortus weedii J. T. Howell 1927-8-6 589 San Diego Near Torrey Pines, just south of Del Mar 30 Comment
  CAS-BOT-BC132660  Calochortus weedii var. intermedius John Thomas Howell 1927-7-3 2636 Orange Claymine [Canon] Canyon, n. Santa Ana Mts. 304 Comment
  RSA0000338  Calochortus weedii var. intermedius J. T. Howell 1927-6-22 193 Orange Botany Garden, Rancho Santa Ana. Comment
  CAS-BOT-BC273385  Calycadenia fremontii John Thomas Howell 1969-8-4 45875 Shasta About 9 miles northeast of Cottonwood Comment
  UC1177315  Calycadenia multiglandulosa J. Thomas Howell 1946-6-20 22109 Marin 4 mi s Olema Comment
  GH414377  Calycadenia oppositifolia J. T. Howell 1962-6-16 37623 Unknown Serpentine, Nelson Bar 213 Comment
  RSA794  Calycadenia tenella J. T. Howell 1928-7-9 1074 Riverside Head of San Juan Canyon. Elsinore Mountains 793 Comment
  CAS-BOT-BC272766  Calycadenia truncata subsp. truncata John Thomas Howell 1937-7-30 13703 Trinity 5 miles west of Junction City Comment
  CAS-BOT-BC436396  Calystegia John Thomas Howell 1947-5-21 23192 Marin Tiburon Comment
  CAS-BOT-BC224303  Calystegia macrostegia John Thomas Howell 1928-5-19 3800 Ventura Anacapa Island Comment
  CAS-BOT-BC95588  Calystegia occidentalis subsp. occidentalis John Thomas Howell 1934-6-13 12083 Modoc Fandango Pass. 1828 Comment
  CAS-BOT-BC215885  Calystegia purpurata subsp. purpurata John Thomas Howell 1944-5-28 19527 Marin Between Almonte and Mill Valley Comment
  CAS-BOT-BC58638  Camelina microcarpa John Thomas Howell 1934-6-30 12279 Modoc Duncan Horse Camp. 1355 Comment
  SEINET10463090  Campanula prenanthoides Howell 1937-7-26 Howell 13561 Siskiyou Between Big Flat and Caribou Gulch Comment
  CAS-BOT-BC37006  Capsella bursa-pastoris John Thomas Howell 1958-5-29 33619 Inyo Bishop. 1264 Comment
  CAS-BOT-BC37087  Capsella bursa-pastoris John Thomas Howell 1965-4-26 41120 Madera Sierra Nevada. Coarsegold. 670 Comment
  CAS-BOT-BC37243  Cardamine breweri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49213 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CAS-BOT-BC37471  Cardamine californica John Thomas Howell 1949-4-6 25297 Marin Low field, Ingacio. Comment
  UC117846  Cardamine californica var. sinuata Thomas Howell 1892-4-24 1409 Del Norte in Sequoia forests near Crescent City; near Crescent City Comment
  GH379023  Cardamine pachystigma J. T. Howell 1951-7-21 28051 Unknown White Chief Trail 2590 Comment
  GH18922  Cardamine tenella var. covilleana T. J. Howell 1904-6-17 30 Unknown Siskiyou Mountains Comment
  CAS-BOT-BC281793  Carduus tenuiflorus John Thomas Howell 1972-6-25 48898 Solano Overlooking Carquinez Strait, W part of Benecia 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-BC18287  Carex John Thomas Howell; Gordon H. True 1973-8-1 50177 Lassen Sierra Nevada. Diamond Range. Gold Run Creek road, south of Susanville. 1584 Comment
  CAS-BOT-BC18354  Carex John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-25 54339 Plumas Sierra Nevada. 2.8 miles north-northeast of Englemine on Diamond Mountain Road. 1341 Comment
  CAS-BOT-BC18446  Carex abrupta John Thomas Howell 1943-8-9 19225 A Glenn Plaskett Meadows. Meadows near ranger station. 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-BC18541  Carex abrupta John Thomas Howell 1958-8-14 34422 Madera Sierra Nevada. Near Isberg Lake. 2987 Comment
  CAS-BOT-BC20331  Carex abrupta John Thomas Howell 1950-7-24 272299 Tulare Sierra Nevda. Monache Creek. 2987 Comment
  CAS-BOT-BC17816  Carex amplifolia John Thomas Howell 1946-6-30 22127 Marin Marsh east of Rodeo Lagoon. 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
  CAS-BOT-BC19682  Carex athrostachya John Thomas Howell 1946-6-13 22025 Marin Chileno Valley. Comment
  CAS-BOT-BC19725  Carex athrostachya John Thomas Howell 1951-6-27 27591 Plumas Sierra Nevada. McRae Meadow. 1981 Comment
  CAS-BOT-BC18109  Carex athrostachya John Thomas Howell 1958-8-16 34537 Madera Sierra Nevada. Between Knoblock Meadow and Cora Lake. 2621 Comment
  CAS-BOT-BC19139  Carex aurea John Thomas Howell 1949-7-26 25780 Tulare Sierra Nevada. Whitney Meadows. 2956 Comment
  UCD140125  Carex aurea John Thomas Howell 1960-7-18 35508 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  CAS-BOT-BC19254  Carex barbarae John Thomas Howell 1966-4-18 41506 Marin Tiburon. Gully just north of John Thomas Howell Botanical Garden. Comment
  CAS-BOT-BC19306  Carex barbarae John Thomas Howell 1956-6-10 31554 San Francisco San Francisco. North slope of Bay View Hills. Comment
  CAS-BOT-BC19379  Carex barbarae John Thomas Howell 1978-4-16 52821 Sutter Feather River near mouth of Bear River, Bobelaine Audubon Sanctuary. Comment
  CAS-BOT-BC19236  Carex barbarae John Thomas Howell 1943-9-19 19329 Marin Dry hills overlooking Escalle salt marsh. Comment
  RSA52011  Carex brevicaulis J. T. Howell 1944-3-26 19345 Marin Above Ledum Swamp, Inverness Ridge. Comment
  RSA0079897  Carex brevicaulis John Thomas Howell 1968-4-18 44191 a Monterey About 4 miles east of Monterey near the airport. Comment
  RSA0079898  Carex brevicaulis John Thomas Howell 1946-4-21 21683 Marin Sandy down near radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC34148  Carex breweri John Thomas Howell 1944-8-10 20288 Mono Dana Plateau. Comment
  CAS-BOT-BC34342  Carex congdonii John Thomas Howell 1942-7-28 17334 Tulare Between Pinto Lake and Black Rock Pass. Comment
  UCD140239  Carex cusickii John Thomas Howell 1958-6-28 33641 Marin Mt. Tamalpais. Comment
  CAS-BOT-BC34432  Carex davyi John Thomas Howell 1944-8-16 20620 Tuolumne Mono Pass. 3230 Comment
  CAS-BOT-BC34854  Carex deflexa var. boottii John Thomas Howell 1941-7-24 16428 Madera Near Garnet Lake. 2956 Comment
  CAS-BOT-BC34899  Carex deflexa var. boottii John Thomas Howell 1942-8-1 17558 Tulare Sky Parlor Meadow. Chagoopa Plateau. Comment
  CAS-BOT-BC18920  Carex densa John Thomas Howell 1956-6-10 31531 San Francisco San Francisco. North slope of Bayview Hills. Comment
  CAS-BOT-BC18938  Carex densa John Thomas Howell 1938-5-1 13785 San Mateo Near South San Francisco. Comment
  CAS-BOT-BC20482  Carex densa John Thomas Howell 1945-5-30 20891 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC35005  Carex densa John Thomas Howell 1941-6-10 16299 Marin 9 miles west of Novato. Comment
  RSA52111  Carex densa J. T. Howell 1943-5-2 17935 Marin Big Carson Canyon. Comment
  UC824432  Carex densa John Thomas Howell 1938-6-5 13903 Marin Rock Spring Mt. Tamalpais, Rock Spring Comment
  CAS-BOT-BC35041  Carex densa John Thomas Howell 1945-5-6 s.n. Marin Near Dominican College. San Raphael. Comment
  CAS-BOT-BC20630  Carex douglasii John Thomas Howell 1949-7-17 25434 Inyo Sierra Nevada. Little Cottonwood Creek. 2987 Comment
  POM248596  Carex dudleyi J. T. Howell 1938-7-3 13948 Sonoma Stony Point. Comment
  RSA38502  Carex exserta J. T. Howell 1948-7-24 24979 Fresno Bullfrog Lake. 3241 Comment
  CAS-BOT-BC20292  Carex filifolia var. erostrata John Thomas Howell 1942-8-1 17566 Tulare Chagoopa Plateau. Comment
  CAS-BOT-BC21203  Carex fissuricola John Thomas Howell 1942-7-29 17372 Tulare Little Five Lakes Basin. Comment
  CAS-BOT-BC21145  Carex fissuricola John Thomas Howell 1958-8-16 34518 Madera Sierra Nevada. East fork of Grantie Creek. 2682 Comment
  CAS-BOT-BC21218  Carex fracta John Thomas Howell 1943-8-3 8960 Glenn Plaskett Meadows. 1828 Comment
  CAS-BOT-BC21302  Carex fracta John Thomas Howell 1976-7-19 51968 Lassen Sierra Nevada. On Gold Run Creek southwest of Susanville. 1386 Comment
  CAS-BOT-BC20677  Carex fracta John Thomas Howell 1943-7-18 18561 Nevada Castle Creek above Soda Springs Station. Comment
  SEINET7559342 Image available Carex fracta John Thomas Howell, T. C. Fuller, G. D. Barbe 1980-7-15 53774 Tulare Pipe Spring, west side of Big Meadow, Kern Plateau. 2377 Comment
  SD72053  Carex globosa John Thomas Howell 1955-6-2 30258 A Sonoma Near Vine Hill School. Comment
  CAS-BOT-BC20886  Carex globosa John Thomas Howell 1933-4-30 11193 Marin North side of Mt. Tamalpais. Comment
  CAS-BOT-BC28326  Carex gracilior John Thomas Howell 1947-6-5 23241 Sonoma Cunningham Marsh. Comment
  CAS-BOT-BC28374  Carex gracilior John Thomas Howell 1930-6-8 5241 Sonoma Bodega Road, 3 mi I of Valley Ford. Comment
  CAS-BOT-BC28383  Carex gracilior John Thomas Howell 1946-5-16 21870 Marin Angel Island, S side. Comment
  CAS-BOT-BC146564  Carex gynodynama John Thomas Howell 1947-5-25 23202 Marin Willow Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC22126  Carex harfordii John Thomas Howell; J. W. Stacey 1936-6-7 12643 Marin Ledum Swamp on road to Point Reyes. Comment
  CAS-BOT-BC22135  Carex harfordii John Thomas Howell 1944-6-4 19575 Marin Inverness Ridge, west of Inverness. Comment
  RSA52315  Carex harfordii J. T. Howell 1944-5-28 19523 Marin Between Almonte and Mill Valley. Comment
  SEINET10888294  Carex heteroneura John Thomas Howell 1944-8-7 Howell 20056 Tuolumne Tuolume Meadows, Comment
  CAS-BOT-BC28076  Carex hoodii John Thomas Howell 1960-7-20 35750 Plumas Rocky slope, Boiling Springs Lake. 1798 Comment
  CAS-BOT-BC7838  Carex incurviformis John Thomas Howell 1949-8-5 26071 Inyo Army Pass. 3657 Comment
  CAS-BOT-BC7841  Carex incurviformis John Thomas Howell 1946-7-24 22700 Inyo Mono Mesa. 3657 Comment
  SEINET10710001  Carex integra John Thomas Howell 1944-8-5 Howell 19989 Tuolumne Tuolumne Meadows, near Parson Lodge. Comment
  CAS-BOT-BC35451  Carex jonesii John Thomas Howell 1950-7-14 26867 Tulare Bakeoven Meadows 2468 Comment
  CAS-BOT-BC35575  Carex jonesii John Thomas Howell 1962-7-11 38602 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC31098  Carex leavenworthii John Thomas Howell 1946-6-8 21990 Alameda Berkeley Tennis Club Comment
  CAS-BOT-BC28540  Carex lenticularis var. impressa John Thomas Howell 1940-8-1 15796 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC31221  Carex lenticularis var. impressa John Thomas Howell 1941-8-3 16742 Madera Near Garnet Lake. 2956 Comment
  SEINET7564601 Image available Carex lenticularis var. impressa John Thomas Howell 1939-8-7 15128 Siskiyou Sky High Valley, Marble Mts. 1829 Comment
  CAS-BOT-BC28445  Carex lenticularis var. lipocarpa John Thomas Howell 1942-7-26 17207 Tulare Mineral King. Comment
  CAS-BOT-BC28464  Carex lenticularis var. lipocarpa John Thomas Howell 1960-8-22 36394 Shasta Hat Lake 1950 Comment
  GH424025  Carex leptalea J. T. Howell 1943-7-4 18254 Unknown Ledum Swamp on road to Pt. Reyes Comment
  RSA88659  Carex leptalea subsp. leptalea J. T. Howell 1936-8-23 12703 Trinity Near Trinity Center Comment
  CAS-BOT-BC31673  Carex luzulina var. ablata John Thomas Howell 1961-6-20 36578 Tehama Bluff Falls. 1981 Comment
  CAS-BOT-BC146620  Carex mendocinensis John Thomas Howell 1940-5-26 15535 Marin Little Carson Falls Comment
  CAS-BOT-BC146638  Carex mendocinensis John Thomas Howell 1942-7-12 17020 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC31803  Carex microptera John Thomas Howell 1949-7-26 25791 Tulare Golden Trout Creek. 2941 Comment
  CAS-BOT-BC31811  Carex microptera John Thomas Howell 1944-8-7 20066 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC31878  Carex microptera John Thomas Howell 1947-8-5 23749 Inyo Big Pine Lakes, Fifth Lake. 3352 Comment
  CAS-BOT-BC119994  Carex multicostata John Thomas Howell 1942-7-26 17257 Tulare Mineral King Comment
  CAS-BOT-BC32176  Carex multicostata John Thomas Howell 1938-8-13 14575 Mariposa Snow Flat Comment
  CAS-BOT-BC32219  Carex multicostata John Thomas Howell s.n. Unknown Unspecified Comment
  SEINET10713219  Carex multicostata John Thomas Howell 1942-8-1 Howell 17563 Tulare Chagoopa Plateau, Tulare Co. Comment
  CAS-BOT-BC119697  Carex nervina John Thomas Howell 1943-7-24 18770 Nevada Frog Lake. Comment
  CAS-BOT-BC119661  Carex neurophora John Thomas Howell 1943-8-9 19224 A Glenn In cold spring NE of Ranger Station, Plaskett Meadows. 1828 Comment
  CAS-BOT-BC119527  Carex nudata John Thomas Howell 1945-8-29 20788 Marin Rocky bed of Lagunitas Creek. Comment
  CAS-BOT-BC119307  Carex obnupta John Thomas Howell; J. W. Stacey 1936-7-26 12676 Sonoma Pitkin Marsh, 5 mi N of Sebastopol. Comment
  CAS-BOT-BC119390  Carex obnupta John Thomas Howell 1946-7-4 22179 Marin Dillons Beach. Comment
  CAS-BOT-BC119287  Carex ovalis John Thomas Howell 1947-6-5 23240 Sonoma Cunningham Marsh. Comment
  RSA201424  Carex ovalis J. T. Howell 1947-6-5 23240 Sonoma Cunningham Marsh Comment
  RSA35304  Carex ovalis J. T. Howell 1944-6-4 19567 Marin Mt. Vision west of Inverness Comment
  CAS-BOT-BC118875  Carex pellita John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-15 53783 Tulare Pipe Spring, west side of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC119098  Carex phaeocephala John Thomas Howell 1941-8-3 16723 Madera Near Garnet Lake. 2956 Comment
  RSA38497  Carex phaeocephala J. T. Howell 1948-7-26 25047 Tulare Center Basin. 3415 Comment
  RSA43477  Carex phaeocephala J. T. Howell 1942-8-7 17815 A Tulare Columbine Lake. Comment
  RSA43478  Carex phaeocephala J. T. Howell 1941-8-22 16382 Fresno Fresno-Inyo County. Mono Pass. 3506 Comment
Read comments
Mar 29 2010
  CAS-BOT-BC118770  Carex preslii John Thomas Howell 1937-7-24 13431 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  CAS-BOT-BC118682  Carex proposita John Thomas Howell 1946-7-24 22701 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC118036  Carex rossii John Thomas Howell 1958-8-16 34491 Madera East Fork of Granite Creek. 2743 Comment
  CAS-BOT-BC118042  Carex rossii John Thomas Howell 1944-8-10 20282 Mono Dana Plateau Comment
  CAS-BOT-BC118170  Carex rossii John Thomas Howell 1942-7-31 17451 Tulare Near timberline, Mt. Kaweah. Comment
  CAS-BOT-BC118195  Carex rossii John Thomas Howell; Gordon H. True 1966-7-11 41706 Tulare Horse Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC118129  Carex rossii John Thomas Howell 1960-7-21 35832 Plumas Meadowy forest floor NW of Willow Lake. 1706 Comment
  GH424021  Carex scabriuscula J. T. Howell 1936-8-24 12725 Unknown Summit of Scott Mts. n. of Carrville Comment
  CAS-BOT-BC28259  Carex scopulorum var. bracteosa John Thomas Howell; Gordon H. True 1967-9-20 43954 Tulare Powell Meadow, ca 6 mi N of Blackrock Guard Station 2682 Comment
  CAS-BOT-BC28262  Carex scopulorum var. bracteosa John Thomas Howell 1942-8-1 17552 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  GH424121  Carex scopulorum var. bracteosa J. T. Howell 1942-8-5 17732 Unknown Kaweah Meadows, Chagoopa Plateau Comment
  CAS-BOT-BC28282  Carex scopulorum var. bracteosa John Thomas Howell 1944-8-13 14578 Mariposa Snow Flat. Comment
  CAS-BOT-BC117454  Carex senta John Thomas Howell 1947-7-21 23450 San Bernardino Lost Creek, San Bernardino Mts. 1920 Comment
  CAS-BOT-BC117561  Carex serratodens John Thomas Howell 1945-6-19 21019 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC117696  Carex simulata John Thomas Howell 1943-7-22 18696 Placer Summit Valley Comment
  CAS-BOT-BC117710  Carex simulata John Thomas Howell 1944-8-3 19870 Alpine W side of Sonora Pass. 2346 Comment
  CAS-BOT-BC117134  Carex spectabilis John Thomas Howell 1947-8-5 23771 Inyo Big Pine Lakes, Fifth Lake. 3352 Comment
  CAS-BOT-BC117306  Carex spectabilis John Thomas Howell 1940-8-1 15826 Tulare Between Reflection Lake and Harrison Pass. Comment
  UC835743  Carex spectabilis John Thomas Howell 1939-8-9 15226 Siskiyou ridge s Marble Valley; Marble Mts. Comment
  SEINET12882914 Image available Carex spectabilis J. T. Howell 1939-1 15226 Unknown Comment
  RSA201388  Carex spissa J. T. Howell 1964-6-28 40716 Monterey Moist ground on Coast Highway at Villa Creek. Comment
  CAS-BOT-BC116961  Carex straminiformis John Thomas Howell 1940-8-1 15829 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC117013  Carex straminiformis John Thomas Howell 1939-8-8 15149 A Siskiyou Black Mt. Marble Mts. Comment
  CAS-BOT-BC117062  Carex straminiformis John Thomas Howell 1947-8-5 23794 Inyo Fifth Lake 3352 Comment
  CAS-BOT-BC116860  Carex subbracteata var. subbracteata John Thomas Howell 1957-5-26 32471 San Francisco North base of Lone Mt. Comment
  CAS-BOT-BC116893  Carex subbracteata var. subbracteata John Thomas Howell 1945-5-27 20883 Marin NE of Mountain Theater, Mt. Tamalpais. Comment
  CAS-BOT-BC116900  Carex subbracteata var. subbracteata John Thomas Howell; J. W. Stacey 1936-6-7 12633 Marin San Geronimo Comment
  CAS-BOT-BC114996  Carex subfusca John Thomas Howell 1951-6-27 27600 Plumas McRae Meadow. 1981 Comment
  CAS-BOT-BC116773  Carex subfusca John Thomas Howell 1942-5-2 17936 Marin Warm Spring, Big Carson Canyon Comment
  UCD140912  Carex subfusca John Thomas Howell 1960-7-22 35875 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  CAS-BOT-BC9353  Carex subnigricans John Thomas Howell 1940-8-1 15821 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC9360  Carex subnigricans John Thomas Howell 1944-8-6 20043 Tuolumne Dog Lake Comment
  CAS-BOT-BC32505  Carex tompkinsii John Thomas Howell 1960-6-6 35333 Fresno Sierra Nevada. 5500Copper Creek Trail, Kings Canyon Comment
  UCR88072  Carex tompkinsii J. T. Howell 1972-4-24 48696 Mariposa Sierra Nevada Mountains, El Portal. 640 Comment
  CAS-BOT-BC115370  Carex utriculata John Thomas Howell 1947-6-4 23212 Marin Swale near radio station, Pt. Reyes Peninsula. Comment
  CAS-BOT-BC115407  Carex utriculata John Thomas Howell 1976-7-15 51854 Plumas Snake Lake, ca 4 mi NW of Quincy. 1219 Comment
  CAS-BOT-BC115482  Carex utriculata John Thomas Howell 1950-7-20 27129 Tulare Shallow margin of river, Bakeoven Meadows, South Fork of Kern River. 2468 Comment
  RSA35084  Carex vesicaria var. vesicaria J. T. Howell 1944-8-17 20676 Tuolumne Soda Springs, Tuolumne Meadows. Comment
  CAS-BOT-BC114847  Carex whitneyi John Thomas Howell 1963-7-9 39657 El Dorado Near foot of Echo Summit grade, 1 mi SW of Meyers. 2011 Comment
  UCD129931  Carlquistia muirii John Thomas Howell 1958-7-20 33679 Fresno Copper Creek Canyon. 2072 Comment
  CAS-BOT-BC281922  Carthamus lanatus John Thomas Howell 1944-8-18 20713 Tuolumne Near Jacksonville Comment
  CAS-BOT-BC241143  Castilleja applegatei subsp. pinetorum John Thomas Howell 1937-7-29 13642 Siskiyou Scott Mt. between Trinity and Siskiyou cos. Comment
  CAS-BOT-BC241158  Castilleja applegatei subsp. pinetorum John Thomas Howell 1937-7-25 13495 A Trinity Stuarts Fork of Trinity River 2225 Comment
  CAS-BOT-BC241185  Castilleja applegatei subsp. pinetorum John Thomas Howell 1942-8-5 17690 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  CAS-BOT-BC241196  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True 1970-6-24 46749 Tulare South Manter Creek, Big Meadow to Manter Meadow, Kern Plateau 2316 Comment
  CAS-BOT-BC241207  Castilleja applegatei subsp. pinetorum John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-15 53754 Tulare Upper part of Brush Creek Canyon on Cherry Hill Road, Kern Plateau 1767 Comment
  JEPS58942  Castilleja attenuata John Thomas Howell 1943-4-11 17917 Marin Black Canyon San Rafael Hills Comment
  CAS-BOT-BC226017  Castilleja chromosa John Thomas Howell 1934-6-13 12094 Modoc 2.5 mi. S of Eagleville. Comment
  JEPS58920  Castilleja densiflora subsp. densiflora John Thomas Howell 1946-5-4 21722 Marin e of Dillons Beach Comment
  CAS-BOT-BC251901  Castilleja lemmonii John Thomas Howell 1943-7-24 18787 Nevada Frog Lake Comment
  CAS-BOT-BC254116  Castilleja miniata John Thomas Howell 1939-8-2 14861 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC40224  Caulanthus lasiophyllus John Thomas Howell 1940-5-20 15510 Marin Point Reyes. Near lighthouse. Comment
  CAS-BOT-BC39470  Caulanthus lemmonii John Thomas Howell 1931-3-20 5902 Kern 2 miles west of Maricopa. Comment
  CAS-BOT-BC47800  Ceanothus John Thomas Howell 1937-4-11 12899 Sonoma 6 miles from Santa Rosa on road to Sonoma Comment
  CAS-BOT-BC48503  Ceanothus confusus John Thomas Howell 1945-6-20 21131 Lake Between Pinnacle Rock and Low Gap, Bartlett Mountain Comment
  RSA21914  Ceanothus confusus J. T. Howell 1935-5-5 12618 Sonoma 6 miles from Santa Rosa on road to Sonoma. Comment
  CAS-BOT-BC48685  Ceanothus cordulatus John Thomas Howell; Gordon H. True 1970-6-24 46711 Tulare North Manter Creek, Big Meadow to Manter Meadow, Kern Plateau 2438 Comment
  CAS-BOT-BC48812  Ceanothus cuneatus John Thomas Howell 1955-6-14 30441 Butte Magalia 731 Comment
  CAS-BOT-BC49031  Ceanothus cuneatus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-25 54297 Plumas Sierra Nevada - East side of Indian Valley just north of Taylorsville 1112 Comment
  CAS-BOT-BC49786  Ceanothus divergens John Thomas Howell 1941-4-5 16167 Napa About 1 mi. sw. of Calistoga Comment
  CAS-BOT-BC50931  Ceanothus foliosus var. foliosus John Thomas Howell 1948-5-16 24298 Marin Upper part of Cascade Canyon, Mt. Tamalpais Comment
  A349340  Ceanothus gloriosus J. T. Howell 1934-3-3 11742 Unknown 8 miles s. of Stewart's Point Comment
  CAS-BOT-BC50015  Ceanothus gloriosus John Thomas Howell 1937-4-11 12903 Sonoma 6 miles from Santa Rosa on road to Sonoma Comment
  CAS-BOT-BC49934  Ceanothus gloriosus var. exaltatus John Thomas Howell 1954-4-24 29149 Mendocino Douglas fir woods, 6 miles north of Willits Comment
  CAS-BOT-BC49975  Ceanothus gloriosus var. gloriosus John Thomas Howell 1934-3-3 11742 Sonoma 8 miles S. of Stewart's Point Comment
  CAS-BOT-BC32740  Ceanothus gloriosus var. porrectus John Thomas Howell 1939-6-4 14710 Marin Inverness Ridge on road to Pt. Reyes Comment
  CAS-BOT-BC50663  Ceanothus jepsonii John Thomas Howell 1926-2-28 1654 Marin Mt. Tamalpais - Rock Spring Trail Comment
  CAS-BOT-BC50541  Ceanothus leucodermis John Thomas Howell 1958-5-22 33190 Tulare Sierra Nevada - Kern River Canyon 3 miles above Roads End P.O. 1219 Comment
  RSA467  Ceanothus megacarpus J. T. Howell 1928-2-6 807 Orange Claymine Canyon, Sierra Peak, Santa Ana Mts. 244 Comment
  CAS-BOT-BC52012  Ceanothus prostratus John Thomas Howell 1962-6-15 37449 Butte Magalia 731 Comment
  POM183416  Ceanothus purpureus J. T. Howell 1931-4-2 6067 Napa Wooden Valley Grade, 5 miles east of Napa Comment
  RSA95275  Ceanothus rigidus J. T. Howell 1931-5-21 6492 Monterey Gibson Canyon, Carmel Highlands. Comment
  CAS-BOT-BC53036  Ceanothus sonomensis John Thomas Howell 1935-5-5 12609 Sonoma Slopes of Triniti Mt., 2 miles ne. of Glen Ellen Comment
  RSA518965  Ceanothus velutinus J. T. Howell 1969-9-14 46210 Mono Leavitt Meadow. 2195 Comment
  CAS-BOT-BC52813  Ceanothus verrucosus John Thomas Howell 1931-6-2 6630 San Diego Torrey Pines Park Comment
  CAS-BOT-BC52480  Ceanothus vestitus John Thomas Howell 1928-6-15 3937 A Inyo Surprise Canyon just above Panamint City, Panamint Mts. 2164 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
  RSA121030  Cenchrus longispinus J. T. Howell 1955-10-11 30914 Merced Near Arena. Comment
  RSA46  Cenchrus longispinus J. T. Howell 1927-7-18 435 Orange Santa Ana River, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC272085  Centaurea cyanus John Thomas Howell 1951-6-26 27552 Plumas Crescent Mills, Sierra Nevada 1066 Comment
  JEPS33683  Centaurium muehlenbergii John Thomas Howell 1926-6-13 2021 Stanislaus Knight's Ferry 121 Comment
  CAS-BOT-BC279342  Centromadia pungens subsp. pungens John Thomas Howell 1967-11-4 44087 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC279584  Centromadia pungens subsp. pungens John Thomas Howell 1962-9-25 38932 Kern South of Kernville below hot springs 792 Comment
  CAS-BOT-BC222959  Cephalanthus occidentalis John Thomas Howell 1929-9-21 4419 San Joaquin Island Road between Brentwood and Stockton near Holt Comment
  CAS-BOT-BC384934  Cerastium arvense John Thomas Howell 1962-6-16 37632 Plumas Lewisia Rock, 3.5 miles southwest of Belden, Feather River Canyon 640 Comment
  CAS-BOT-BC384992  Cerastium fontanum John Thomas Howell 1964-8-10 40916 Alpine Markleeville 1676 Comment
  CAS-BOT-BC388377  Cerastium glomeratum John Thomas Howell 1964-6-30 40887 San Luis Obispo Cambria Comment
  CAS-BOT-BC135508  Cercocarpus betuloides var. betuloides John Thomas Howell 1939-5-7 14645 Lake 8 1/2 miles east of Lower Lake on road to Knoxville Comment
  CAS-BOT-BC135573  Cercocarpus betuloides var. betuloides John Thomas Howell; Alice Eastwood 1938-6-13 5856 Fresno Range south of Jacalitos Creek Comment
  CAS-BOT-BC135574  Cercocarpus betuloides var. betuloides John Thomas Howell; R. C. Barneby 1960-6-7 35433 Fresno Kings Canyon Road 6.5 miles northeast of Cherry Gap - Sierra Nevada 1554 Comment
  CAS-BOT-BC137214  Cercocarpus betuloides var. betuloides John Thomas Howell; Gordon H. True 1969-5-13 45697 Tulare 2 miles south of Lamont Meadow near summit of Spanish Needle Creek road, Kern Plateau 1645 Comment
  CAS-BOT-BC136955  Cercocarpus ledifolius var. intricatus John Thomas Howell; Gordon H. True 1966-7-12 41813 Kern Just east of Fay Creek Canyon, Kern Plateau 2194 Comment
  CAS-BOT-BC214642  Cercocarpus ledifolius var. ledifolius John Thomas Howell 1934-6-12 12009 Modoc Between Davis Creek and Plum Valley. Comment
  CAS-BOT-BC279494  Chaenactis alpigena John Thomas Howell 1951-7-18 27914 Tulare Mineral King and vicinity. West side, Franklin Pass 3352 Comment
  CAS-BOT-BC277662  Chaenactis glabriuscula var. megacephala John Thomas Howell 1945-6-19 21030 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC284308  Chaenactis stevioides John Thomas Howell 1949-7-17 25412 Inyo Wonoga Peak 2895 Comment
  RSA223676  Chamaesyce maculata J. T. Howell 1956-7-1 31641 San Francisco Front and Vallejo Streets. Comment
  GH347546  Chamaesyce vallis-mortae J. T. Howell 1958-5-23 33198 Unknown 10 miles east of Onyx 1036 Comment
  CAS-BOT-BC68204  Cheilanthes gracillima John Thomas Howell 1937-7-26 13524 Siskiyou Salmon-Trinity Alps, - Caribou Basin 2286 Comment
  CAS-BOT-BC68135  Cheilanthes intertexta John Thomas Howell 1953-5-24 29009 Tuolumne between Pinecrest and Cow Creek 1737 Comment
  CAS-BOT-BC473039  Chenopodium John Thomas Howell 1962-7-7 381191 Kern Wofford 792 Comment
  SD71431  Chenopodium album John Thomas Howell 1956-10-28 San Francisco Presidio: mountain lake; high water line on sandy beach. Comment
  CDA2986  Chenopodium album var. stevensii J. T. Howell, G. H. True 1969-9-3 46395 Tulare Kern Plateau; Cherry Hill Road, 1 miles northwest of Big Meadow. Comment
  UCD97898  Chenopodium berlandieri var. zschackei John Thomas Howell 1962-9-23 38826 Kern Sierra Nevada. Greenhorn Summit. Greenhorn Mountains. 1859 Comment
  CDA3017  Chenopodium chenopodioides J. T. Howell, G. H. True 1967-9-19 43894 Tulare Kern Plateau, Sierra Nevada; Flood-plain of Kern River South Fork, Kennedy Meadows Campground. Comment
  NY990893  Chenopodium strictum var. glaucophyllum J. T. Howell 1969-9-28 46257 Tulare Road's End, Kern River Canyon 1097 Comment
  CAS-BOT-BC451392  Chimaphila menziesii John Thomas Howell 1943-8-8 19183 Unknown Anthony Peak, Tehama & Mendlcino Counties Comment
  CAS-BOT-BC184920  Chloris gayana John Thomas Howell 1962-9-25 38913 Kern Sierra Nevada. Kernville. 807 Comment
  CAS-BOT-BC39661  Chorispora tenella John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-28 53374 Siskiyou 2 miles south of Grenada, Shasta Valley. 762 Comment
  SEINET4182624  Chorizanthe brevicornu var. spathulata J. T. Howell 1958-5-28 33591 Inyo Bishop Creek 1524 Comment
  UC1176905  Chorizanthe cuspidata John Thomas Howell 1946-7-4 22176 Marin Dillons Beach Comment
  CAS-BOT-BC247862  Chorizanthe watsonii John Thomas Howell 1962-6-19 37885 Lassen 3 mi. s. of Hallelujah Junction 1524 Comment
  RSA54048  Chrysanthemum leucanthemum J. T. Howell 1949-7-4 25356 San Mateo Skyline Blvd., north of Millbrae Comment
  GH344102  Chrysolepis chrysophylla J. T. Howell 1947-7-6 23327 Unknown Eldridge Grade above Phoenix Lake, Mt. Tamalpais Comment
  RSA263852  Chrysolepis chrysophylla J. T. Howell 1973-7-19 49953 El Dorado Blodgett Forest. 1311 Comment
  SBBG50530  Chrysolepis chrysophylla J. T. Howell 1973-7-19 El Dorado Blodgett Forest 1310 Comment
  RSA44441  Chrysothamnus nauseosus subsp. albicaulis J. T. Howell 1947-8-13 24042 Inyo Black Lake Trail, Big Pine Lakes 3049 Comment
  CAS-BOT-BC100797  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1949-8-13 26282 Inyo Little Cottonwood Creek 2895 Comment
  CAS-BOT-BC100868  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1950-7-17 27034 Tulare Templeton Meadows 2590 Comment
  CAS-BOT-BC162785  Chylismia claviformis subsp. claviformis John Thomas Howell 1928-3-11 3420 Riverside Morongo Canyon, N. Colorado Desert 609 Comment
  CAS-BOT-BC285358  Cirsium andersonii John Thomas Howell; Gordon H. True 1969-10-1 46426 Tulare Brush Creek Overlook, about 2 miles north of Poison Meadow, Kern Plateau 2468 Comment
  CAS-BOT-BC285372  Cirsium andersonii John Thomas Howell 1942-8-5 17682 Tulare Between Big Arroyo and Chagoopa Plateau 3048 Comment
  CAS-BOT-BC289602  Cirsium andersonii John Thomas Howell; Gordon H. True 1967-8-18 4008 Nevada Sagehen Creek Road ca. 1/2 miel swest of Truckee-Sierraville Hwy. 1828 Comment
  SEINET12897775 Image available Cirsium andrewsii J. T. Howell 1933-1 11424 Unknown Comment
  CAS-BOT-BC278007  Cirsium cymosum John Thomas Howell 1934-6-10 11908 Lassen Madeline Plains near Termo Comment
  CAS-BOT-BC278082  Cirsium douglasii var. breweri John Thomas Howell 1943-8-9 19217 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC279970  Cirsium douglasii var. douglasii John Thomas Howell 1955-7-20 30890 Nevada Near northwest end of Donner Lake 1828 Comment
  CAS-BOT-BC100936  Cirsium fontinale var. fontinale John Thomas Howell 1932-10-19 10852 San Mateo Crystal Springs Lake Comment
  CAS-BOT-BC100974  Cirsium hydrophilum var. vaseyi John Thomas Howell 1938-6-5 13897 Marin Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC280017  Cirsium mohavense John Thomas Howell 1948-8-1 25268 Inyo Owens Valley, 1.5 miles south of Pine Creek Comment
  CAS-BOT-BC280054  Cirsium neomexicanum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-27 53114 Alpine East side of Ebbetts Pass on road to Markleeville 1828 Comment
  CAS-BOT-BC280087  Cirsium occidentale var. californicum John Thomas Howell 1925-5-10 1029 Merced Merced River bottom between Snelling and Hopeton Comment
  CAS-BOT-BC285606  Cirsium occidentale var. occidentale John Thomas Howell 1946-5-14 21844 Marin Along road between Rock Spring and Summit Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC285641  Cirsium occidentale var. occidentale John Thomas Howell 1933-6-29 11408 San Bernardino Summit of Cajon Pass Comment
  CAS-BOT-BC285717  Cirsium occidentale var. occidentale John Thomas Howell 1931-5-29 6580 Ventura Santa Susana Pass Comment
  UC1177303  Cirsium occidentale var. occidentale J. Thomas Howell 1946-5-14 21844 Marin along road between Rock Spring and Summit Meadow; Mt. Tamalpais Comment
  CAS-BOT-BC280414  Cirsium occidentale var. venustum John Thomas Howell 1969-8-25 45901 Tulare Near Mineral King on Farewell Gap Trail near Crystal Creek 2438 Comment
  CAS-BOT-BC286549  Cirsium occidentale var. venustum John Thomas Howell 1931-5-23 6508 Monterey Jolon Grade, 11 miles west of King City, Santa Lucia Mts. Comment
  CAS-BOT-BC288040  Cirsium occidentale var. venustum John Thomas Howell 1962-6-15 37430 Butte 4 miles from Paradise on road to Oroville 106 Comment
  CAS-BOT-BC292678  Cirsium occidentale var. venustum John Thomas Howell 1940-8-9 16076 Fresno Between Vidette Meadow and Bullfrog Lake Comment
  CAS-BOT-BC280413  Cirsium occidentale var. venustum John Thomas Howell; Gordon H. True 1971-7-16 48618 Tulare Cherry Hill Road near Rincon Trail, Brush Creek Canyon. Kern Plateau 1463 Comment
  CAS-BOT-BC286556  Cirsium occidentale var. venustum John Thomas Howell 1953-6-15 29096 Monterey Santa Lucia Mountains. East of Jamesburg - Greenfield summit Comment
  CAS-BOT-BC280532  Cirsium quercetorum John Thomas Howell 1938-7-3 13953 Sonoma Stony Point Comment
  UC1177293  Cirsium quercetorum John Thomas Howell 1943-6-6 18200 Marin between Mill Valley Muir Woods Comment
  CAS-BOT-BC280484  Cirsium quercetorum John Thomas Howell 1953-6-15 29100 Monterey Santa Lucia Mountains. 20 miles from Greenfield on road to Carmel Comment
  CAS-BOT-BC285753  Cirsium remotifolium John Thomas Howell 1937-7-4 13070 Sonoma Near Petrified Forest Comment
  CAS-BOT-BC288743  Cirsium remotifolium John Thomas Howell 1946-5-16 21878 Marin Angel Island, S side Comment
  CAS-BOT-BC288744  Cirsium remotifolium John Thomas Howell 1943-5-30 18181 Marin Summit Ave, Mill Valley Comment
  CAS-BOT-BC288772  Cirsium remotifolium John Thomas Howell 1939-8-4 15033 Siskiyou Between Elk Mt and Marble River, Marble Mts Comment
  CAS-BOT-BC286293  Cirsium scariosum John Thomas Howell 1947-8-5 23741 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC285838  Cirsium vulgare John Thomas Howell 1959-9-22 34859 Plumas Drakesbad 1737 Comment
  CAS-BOT-BC438647  Cistanthe John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54278 Plumas Mt. Hough 2203 Comment
  CAS-BOT-BC439034  Cistanthe monosperma John Thomas Howell 1951-6-29 27765 Plumas Feather River Canyon 548 Comment
  CAS-BOT-BC439076  Cistanthe monosperma John Thomas Howell 1944-8-7 20067 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC229062  Cistanthe umbellata John Thomas Howell 1948-7-28 25113 Tulare Center Basin 3657 Comment
  CAS-BOT-BC160990  Clarkia amoena subsp. amoena John Thomas Howell 1946-6-9 22012 Marin Pierce Ranch, n. Pt. Reyes Peninsula Comment
  CAS-BOT-BC164124  Clarkia breweri John Thomas Howell 1937-5-19 12954 San Benito The Pinnacles Comment
  RSA512849  Clarkia cylindrica J. T. Howell 1971-7-12 48331 Kern West slope of Greenhorn Range, 3 miles east of Glenville. 1280 Comment
  CAS-BOT-BC171994  Clarkia epilobioides John Thomas Howell 1931-5-30 6591 Riverside Santiago Peak Trail, Santa Ana Mts. Comment
  CAS-BOT-BC164611  Clarkia gracilis subsp. gracilis John Thomas Howell 1946-5-12 21811 Marin Carson Ridge Comment
  CAS-BOT-BC163150  Clarkia imbricata John Thomas Howell 1945-7-18 21315 Sonoma Dry slope bordering Pitkin Marsh Comment
  CAS-BOT-BC163169  Clarkia lassenensis John Thomas Howell 1967-6-23 42717 Plumas Canyon of the East Branch of the Feather River 2 miles east of Twain Comment
  CAS-BOT-BC163414  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1954-5-16 29584 Sacramento 4 miles southeast of Folsom on Placerville road Comment
  CAS-BOT-BC163484  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1955-6-13 30373 Trinity 1 mile south of Hayfork 731 Comment
  CAS-BOT-BC165287  Clarkia speciosa subsp. polyantha John Thomas Howell; Gordon H. True 1971-7-12 48328 Kern 2.7 miles northeast of Woody on road to Glennville 731 Comment
  POM193907  Claytonia exigua subsp. exigua J. T. Howell 1930-4-6 4658 Santa Clara Rocky slope, summit of Mt. Hamilton. Comment
  CAS-BOT-BC439840  Claytonia perfoliata John Thomas Howell 1965-4-25 41114 Madera 3 miles northeast of Coarsegold 762 Comment
  CAS-BOT-BC439835  Claytonia perfoliata John Thomas Howell; Gordon H. True 1971-6-14 47680 Kern 3 mi. west of Glennville on road to Woody 1158 Comment
  CAS-BOT-BC440106  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1962-7-11 38533 Kern Sw. of Black Mt. Saddle, Greenhorn Mountains 1920 Comment
  CAS-BOT-BC443592  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1946-4-13 21604 Marin Near Rock Spring, Mt. Tamalpais Comment
  CAS-BOT-BC443622  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1957-4-27 32040 Monterey Santa Lucia Mountains. 8 miles n. of Carmel Valley 182 Comment
  CAS-BOT-BC91377  Clematis lasiantha John Thomas Howell 1928-3-4 3372 Los Angeles Santa Monica Mountains, northeast of Pacific Palisades. Comment
  CAS-BOT-BC91545  Clematis lasiantha John Thomas Howell; Gordon H. True 1968-5-12 44242 Tulare Sierra Nevada. Kern Plateau. Along Brush Creek. 1402 Comment
  CAS-BOT-BC91440  Clematis lasiantha John Thomas Howell 1955-7-7 30560 Monterey Santa Lucia Mountains. Ridge southeast of Bear Mountain. 1371 Comment
  JEPS42687  Cleomella obtusifolia John Thomas Howell 1927-7-9 2680 San Bernardino along road between Box S Ranch and Deadman's Point (nearer Box S Ranch) 914 Comment
  RSA121023  Collinsia heterophylla J. T. Howell 1957-5-19 32364 Stanislaus Del Puerto Canyon. Comment
  CAS-BOT-BC226087  Collinsia parviflora John Thomas Howell 1934-6-13 12055 Modoc Fandango Pass. 1828 Comment
  POM203034  Collinsia sparsiflora var. collina J. T. Howell 1934-4-8 11810 Contra Costa 7 miles from Clayton on road to Livermore. Comment
  CAS-BOT-BC286135  Conyza canadensis John Thomas Howell 1939-6-18 14768 Marin Near Mud Lake Comment
  CAS-BOT-BC286085  Conyza canadensis John Thomas Howell 1958-7-19 33649 Fresno Cedar Grove, S. Fork Kings River 1402 Comment
  CAS-BOT-BC286166  Conyza canadensis John Thomas Howell 1960-7-20 35775 Plumas Lassen Volcanic National Park. Boiling Springs Lake 1798 Comment
  CAS-BOT-BC288937  Conyza canadensis John Thomas Howell; Gordon H. True 1967-8-10 43718 Tulare About 4.5 miles ENE of Pixley, along Road 104 83 Comment
  CAS-BOT-BC288981  Conyza floribunda J. T. Howell 1956-9-30 31897 San Francisco Waterfront St near Mission Rock Terminal Comment
  CAS-BOT-BC26795  Cordylanthus nidularius John Thomas Howell 1942-7-19 17044 Contra Costa NE of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC238089  Cordylanthus rigidus subsp. brevibracteatus John Thomas Howell 1970-9-22 47294 Tulare Kern River Canyon, 2.3 miles south of Hospital Flat 853 Comment
  LA209076  Cordylanthus rigidus subsp. rigidus John Thomas Howell; 1933-8-13 11500 Santa Clara 3 mi. from Smith Creek on road to Mt. Hamilton Comment
  CAS-BOT-BC101030  Coreopsis gigantea John Thomas Howell 1932-3-13 8220 Ventura San Nicolas Island Comment
  CAS-BOT-BC101176  Corethrogyne filaginifolia John Thomas Howell 1930-10-24 5654 A Monterey 5.2 miles east of The Indians, Santa Lucia Mts. Comment
  CAS-BOT-BC105656  Corethrogyne filaginifolia John Thomas Howell 1944-5-14 19454 Marin Pt. Reyes Station Comment
  GH387100  Corethrogyne filaginifolia J. T. Howell 1933-8-19 11613 Unknown Mt. Hermon, Santa Cruz Mts. Comment
  JEPS74311  Corethrogyne filaginifolia John Thomas Howell 1973-11-2 50311 Kern near summit Grocer Grade (s of Maricopa) 762 Comment
  GH387193  Corethrogyne filaginifolia var. peirsonii J. T. Howell 1970-9-25 47438 Unknown Kernville 807 Comment
  CAS-BOT-BC209721  Cornus John Thomas Howell 1977-6-21 52379 Plumas Seneca 1097 Comment
  A385385  Cornus glabrata J. T. Howell 1939-5-7 14654 Unknown 3 1/2 miles from Knoxville on road to Lower Lake Comment
  CAS-BOT-BC210324  Cornus sericea John Thomas Howell 1959-9-24 34937 Plumas Butterfly Creek near mouth Comment
  CAS-BOT-BC212161  Cornus sericea John Thomas Howell 1958-7-30 34133 Fresno Simpson Meadow, Middle Fork of the Kings River, Sierra Nevada 1828 Comment
  CAS-BOT-BC210567  Cornus sessilis John Thomas Howell 1955-6-14 30418 Trinity 2 miles west of Buckhorn Mt. summit 792 Comment
  CAS-BOT-BC169510  Corylus cornuta subsp. californica John Thomas Howell 1925-2-8 751 Alameda Strawberry Canon [canyon], Berkeley Hills Comment
  CAS-BOT-BC172839  Corylus cornuta subsp. californica John Thomas Howell 1969-9-12 46089 El Dorado Near Bridal Veil Falls, 3 miles W of Riverton. Sierra Nevada Comment
  CAS-BOT-BC427586  Crassula aquatica John Thomas Howell 1944-5-21 19499 Marin Lagunitas Meadows, Mt. Tamalpais Comment
  CAS-BOT-BC427602  Crassula aquatica John Thomas Howell 1926-11-7 2243 San Francisco Lake Merced, San Francisco. Comment
  CAS-BOT-BC427899  Crassula connata John Thomas Howell 1967-4-30 42118 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC427913  Crassula connata John Thomas Howell 1932-3-13 8214 Ventura San Nicolas Island Comment
  CAS-BOT-BC290354  Crepis acuminata John Thomas Howell 1941-8-2 16699 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC291527  Crepis intermedia John Thomas Howell 1939-8-4 15041 Siskiyou Marble Rim, Marble Mts. 1889 Comment
  CAS-BOT-BC291515  Crepis intermedia John Thomas Howell 1925-6-29 1253 El Dorado Armstrong's, Everald Bay, Lake Tahoe 1889 Comment
  UCD126217  Cressa truxillensis John Thomas Howell 1973-7-25 50009 Merced Ingomar. 30 Comment
  RSA429  Croton californicus J. T. Howell 1928-7-9 1060 Riverside Temescal Canyon, 6 miles south of Glen Ivy 335 Comment
  RSA54053  Croton californicus var. tenuis J. T. Howell 1948-7-2 24768 Los Angeles Redondo Beach. Comment
  CAS-BOT-BC182507  Cryptantha John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-25 54299 Plumas East side of Indian Valley just north of Taylorsville 1112 Comment
  CAS-BOT-BC189292  Cryptantha John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-13 54583 Mono Just N of Old Sherwin Hill Summit on Old Sherwin Grade Road 1950 Comment
  CAS-BOT-BC54133  Cryptantha ambigua John Thomas Howell 1934-6-30 12297 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC189326  Cryptantha circumscissa John Thomas Howell 1934-6-10 11852 Lassen 4 miles S of Omira Comment
  RSA0094677  Cryptantha clevelandii J. T. Howell 1955-7-7 30558 Monterey Ridge southeast of Bear Mt., Santa Lucia Mountains. 1220 Comment
  CAS-BOT-BC218817  Cryptantha glomeriflora John Thomas Howell; Gordon H. True 1967-5-29 42411 Tulare Kern Plateau, near north end of Long Valley in metamorphic area 2103 Comment
  SEINET8542118  Cryptantha glomeriflora J. T. Howell 1963-7-10 39744 Alpine Sierra Nevada, flat near Monitor Pass. 2530 Comment
  UC750727  Cryptantha glomeriflora John Thomas Howell 1946-7-27 22804 Inyo near Ruby Lake; Rock Creek Lake Basin 3352 Comment
  JEPS22385  Cryptantha intermedia John Thomas Howell 1927-6-5 2435 Orange Santa Ana Canyon 152 Comment
  POM226103  Cryptantha leiocarpa J. T. Howell 1933-5-7 11219 San Francisco Above Marine Hospital, Presidio, San Francisco. Comment
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Sep 7 2010
  CAS-BOT-BC70416  Cryptogramma acrostichoides John Thomas Howell 1946-7-16 22454 Inyo Long Lake, Rock Creek Lake Basin 3230 Comment
  RSA128701  Cupressus macrocarpa J. T. Howell 1957-5-8 s.n. San Mateo Skyline Blvd. west of San Bruno Comment
  SEINET944599  Cuscuta brachycalyx John Thomas Howell, Gordon H. True 1967-1 43959 Tulare ''Phacelia Gulch'', 2.8 miles from Kennedy Meadow bridge on road to Troy Meadow. Kern Plateau 2195 Comment
  CAS-BOT-BC215947  Cuscuta californica John Thomas Howell 1969-9-13 46101 Sierra Little Truckee River near outlet of Webber Lake, Sierra Nevada 2042 Comment
  RSA40172  Cuscuta californica J. T. Howell 1943-8-10 19264 Glenn Black Butte Comment
  POM203115  Cuscuta californica J. T. Howell 1933-8-17 11539 San Benito 4 miles N of Pinnacles Comment
  RSA22025  Cuscuta ceanothi J. T. Howell 1939-9-3 15355 Marin San Antonio Creek Comment
  UCD98529  Cycloloma atriplicifolium John Thomas Howell 1963-3-6 48117 Merced 6 miles south of Livinston at Merced-Gustine road. 30 Comment
  CAS-BOT-BC299745  Cynara cardunculus John Thomas Howell 1953-3-15 28922 Contra Costa Danville Comment
  CAS-BOT-BC190177  Cynodon dactylon John Thomas Howell 1954-9-6 30068 Calaveras Altaville. Comment
  CAS-BOT-BC190254  Cynodon dactylon John Thomas Howell 1963-8-5 39948 Monterey Just east of King City on Lonoak Road. Comment
  RSA98059  Cynosurus echinatus J. T. Howell 1954-8-11 s.n. Santa Cruz 2 miles from Skyline Boulevard on road to Big Basin. Comment
  CAS-BOT-BC114546  Cyperus eragrostis John Thomas Howell 1959-9-21 34795 Plumas Virgilia. 841 Comment
  UCD141045  Cyperus erythrorhizos John Thomas Howell 1970-9-25 47466 Kern Sierra Nevada, Lake Isabella, about 5 miles S of Kernville. 792 Comment
  CAS-BOT-BC113976  Cyperus odoratus John Thomas Howell 1952-10-28 288912 Tulare Three Rivers Comment
  UCD141125  Cyperus odoratus John Thomas Howell 1974-9-19 50878 Sutter 1.7 mi. south 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-BC114054  Cyperus squarrosus John Thomas Howell; Gordon H. True 1969-9-29 46286 Tulare Upper Dry Lake, E of North end of Long Meadow. 2392 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-BC70685  Cystopteris fragilis John Thomas Howell 1947-7-23 23548 San Bernardino Dollar Lake, San Bernardino Mts. 2865 Comment
  CAS-BOT-BC70698  Cystopteris fragilis John Thomas Howell 1969-9-13 46102 Sierra Little Truckee River near outlet of Webber Lake 2042 Comment
  CAS-BOT-BC70550  Cystopteris fragilis John Thomas Howell 1960-8-18 36069 Tehama Bluff Falls 1981 Comment
  CAS-BOT-BC445536  Damasonium californicum John Thomas Howell 1926-7-30 2161 Plumas Near Prattville 1371 Comment
  CAS-BOT-BC189729  Danthonia californica John Thomas Howell 1945-6-21 21145 Lake Bartlett Mountain. Sawmill Flat. 1219 Comment
  CAS-BOT-BC189863  Danthonia californica John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49487 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  RSA299134  Danthonia californica var. americana J. T. Howell 1958-7-30 34139 Fresno Simpson Meadow, Middle Fork of the Kings River 1829 Comment
  CAS-BOT-BC194380  Danthonia intermedia John Thomas Howell 1946-7-28 22829 Inyo Box Lake, Rock Creek Lake Basin 3200 Comment
  SEINET10598336  Danthonia intermedia John Thomas Howell 1944-8-11 Howell 20336 Tuolumne Tuolumne Meadows. Comment
  GH341148  Danthonia unispicata J. T. Howell 1941-8-3 16728 Unknown Near Garnet Lake, Madera County 2956 Comment
  SEINET10860728  Danthonia unispicata John Thomas Howell 1955-6-13 Howell 30382 Trinity Hayfork. Comment
  CAS-BOT-BC287377  Deinandra corymbosa John Thomas Howell 1943-5-23 18171 Alameda Hills above Mills College Comment
  CAS-BOT-BC286260  Deinandra corymbosa John Thomas Howell 1930-8-3 5418 Monterey Between Mission San Carlos and Del Monte Comment
  UC473564  Deinandra lobbii John Thomas Howell 1930-10-24 5634 Monterey 17.2 mi e The Indians; Santa Lucia Mountains Comment
  CAS-BOT-BC291777  Deinandra lobbii John Thomas Howell 1934-7-3 12380 Lassen Big Valley near Bieber Comment
  CAS-BOT-BC9133  Delphinium cardinale John Thomas Howell 1963-6-22 39553 Monterey Priest Valley 685 Comment
  CAS-BOT-BC10170  Delphinium hansenii John Thomas Howell; Gordon H. True 1967-5-29 42374 Tulare Near north end of lamont Meadow on road to Chimney Meadow, Kern Plateau 1859 Comment
  CAS-BOT-BC10011  Delphinium hesperium subsp. pallescens John Thomas Howell 1934-4-8 11824 Contra Costa South of Antioch Comment
  CAS-BOT-BC9814  Delphinium nudicaule John Thomas Howell 1926-3-20 1697 Napa Old toll toad to Mt. St. Helena Comment
  POM204447  Delphinium nudicaule J. T. Howell 1933-5-21 11300 Solano Blue Rock Springs Comment
  CAS-BOT-BC116213  Delphinium parishii John Thomas Howell 1928-4-2 3654 Inyo 2 miles east of Bradbury Well, Black Mountains Comment
  CAS-BOT-BC116456  Delphinium patens subsp. patens J. T. Howell 1933-5-14 11279 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC121630  Delphinium patens subsp. patens John Thomas Howell 1962-7-10 38488 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC168182  Delphinium polycladon John Thomas Howell 1941-7-31 16546 Madera Agnew Pass Trail Comment
  CAS-BOT-BC17104  Delphinium uliginosum John Thomas Howell 1943-5-11 18046 Lake 2.9 miles north of Middletown Comment
  RSA26407  Delphinium variegatum J. T. 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
  CAS-BOT-BC194261  Deschampsia cespitosa subsp. cespitosa John Thomas Howell; Gordon H. True 1973-8-1 50230 Lassen Headwaters of Boxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC192630  Deschampsia danthonioides John Thomas Howell 1946-7-17 22494 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC201677  Deschampsia danthonioides John Thomas Howell 1950-7-14 26875 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  RSA201362  Deschampsia danthonioides J. T. Howell 1960-7-19 35619 Plumas Lassen Volcanic National Park; Drakesbad 1677 Comment
  CAS-BOT-BC195540  Deschampsia elongata John Thomas Howell 1969-8-26 45954 Tulare Mineral King 2377 Comment
  CAS-BOT-BC201822  Deschampsia elongata John Thomas Howell 1944-6-25 19660 Marin Between Santa Venetia and Chinese Camp Comment
  SEINET199906 Image available Deschampsia elongata J. T. Howell 1942-6-21 16982 Marin Carson Ridge Comment
  CAS-BOT-BC39755  Descurainia californica John Thomas Howell 1940-7-28 15623 Fresno Bubbs Creek. Near Sphinx Creek. Comment
  CAS-BOT-BC40944  Descurainia californica John Thomas Howell 1944-8-16 20655 Mono Mono Pass. Comment
  CAS-BOT-BC43047  Descurainia incisa subsp. incisa John Thomas Howell 1951-7-17 27818 Tulare Mineral King and Vicinity. White Chief Trail. 2743 Comment
  CAS-BOT-BC58612  Descurainia pinnata subsp. brachycarpa John Thomas Howell 1934-6-30 12290 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC43235  Descurainia pinnata subsp. brachycarpa John Thomas Howell; Gordon H. True 1968-5-13 44280 Tulare Sierra Nevada. Kern Plateau. North Meadow Creek. 2042 Comment
  CAS-BOT-BC43305  Descurainia pinnata subsp. glabra John Thomas Howell 1958-5-24 33322 Inyo Sierra Nevada. Whitney Portal Road. 1920 Comment
  CAS-BOT-BC43382  Descurainia pinnata subsp. glabra John Thomas Howell 1928-3-11 3410 San Bernardino West end of Morango Valley, south Mojave Desert. 914 Comment
  CAS-BOT-BC43457  Descurainia sophia John Thomas Howell 1962-4-9 37081 Kern Sierra Nevada. Kernville. Comment
  CAS-BOT-BC43536  Descurainia sophia John Thomas Howell; Gordon H. True 1967-7-4 43967 Tulare Sierra Nevada. Kern Plateau. Troy Meadow. 2377 Comment
  CAS-BOT-BC43431  Descurainia sophia John Thomas Howell 1972-4-24 48676 Stanislaus 4 miles northwest of Ingram Creek, west side of San Joaquin Valley. 30 Comment
  RSA316  Dicentra chrysantha J. T. Howell 1927-7-9 345 San Bernardino Baldwin Lake 2012 Comment
  CAS-BOT-BC208933  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell; Gordon H. True 1966-7-10 41597 Tulare On bank of Kern River at Roads End - Sierra Nevada 1066 Comment
  CAS-BOT-BC254477  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1937-6-6 13032 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC500808  Dichelostemma capitatum John Thomas Howell 1957-5-6 32194 San Francisco Hunter's Point Comment
  CAS-BOT-BC292269  Dieteria canescens John Thomas Howell 1978-7-29 53348 Nevada 5 miles north of Truckee on road to Sierraville 1767 Comment
  CAS-BOT-BC299783  Dieteria canescens var. canescens John Thomas Howell 1928-6-15 3938 Inyo Upper part of Surprise Canyon, Panamint Mts. 2377 Comment
  CAS-BOT-BC299784  Dieteria canescens var. canescens John Thomas Howell 1946-7-15 22369 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  UCD63943  Digitaria ischaemum John Thomas Howell 1959-9-20 34642 Butte Eastern outskirts of Oroville. 60 Comment
  CAS-BOT-BC208992  Digitaria sanguinalis John Thomas Howell 1954-11-20 30143 Alameda 1618 Milvia St., Berkeley Comment
  CAS-BOT-BC152488  Diplacus aurantiacus John Thomas Howell 1964-6-29 40729 San Luis Obispo In Monterey pine forest adjacent to the Protestant Cemetery, about 1 mile north of Cambria Comment
  CAS-BOT-BC152999  Diplacus constrictus John Thomas Howell 1930-5-15 5122 Kern Hills near Glenville [Glennville], Greenhorn Range 975 Comment
  CAS-BOT-BC151950  Diplacus douglasii John Thomas Howell 1941-4-6 16177 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC153315  Diplacus kelloggii John Thomas Howell 1955-6-5 30284 Tuolumne Twain Harte 1127 Comment
  CAS-BOT-BC153410  Diplacus layneae John Thomas Howell 1940-5-19 15461 Napa Upper St. Helena Creek Comment
  CAS-BOT-BC153476  Diplacus layneae John Thomas Howell 1954-6-6 29976 Tuolumne Twain Harte 1127 Comment
  CAS-BOT-BC153512  Diplacus leptaleus John Thomas Howell 1958-7-20 33699 Fresno Granite Basin 3048 Comment
  CAS-BOT-BC151810  Diplacus mephiticus John Thomas Howell 1963-7-11 39820 Nevada Sagebrush flat, 3 miles northeast of Truckee - Sierra Nevada 1767 Comment
  CAS-BOT-BC153940  Diplacus pulchellus John Thomas Howell 1955-6-3 30263 Tuolumne Between Sugar Pine and Long Barn 1493 Comment
  CAS-BOT-BC153966  Diplacus rattanii John Thomas Howell 1931-5-30 6613 Riverside Santiago Peak, Santa Ana Mts. Comment
  CAS-BOT-BC151633  Diplacus torreyi John Thomas Howell 1963-7-12 39860 A El Dorado 3 miles sw. of Twin Bridges on road to Kyburz - Sierra Nevada 1676 Comment
  UCD64182  Distichlis spicata John Thomas Howell; Gordon H. True 1972-6-29 48925 Contra Costa On Byron Hot Springs Road southeast of Byron. Comment
  CAS-BOT-BC136151  Dodecatheon alpinum John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-20 53551 Trinity Scott Mountain summit on road from Carrville to Callahan 1645 Comment
  POM203995  Dodecatheon clevelandii subsp. patulum J. T. Howell 1933-3-31 10917 San Francisco Bernal Heights. Comment
  CAS-BOT-BC129974  Dodecatheon redolens John Thomas Howell 1949-7-20 25558 Tulare Sky Blue Lake 3505 Comment
  CAS-BOT-BC33312  Downingia ornatissima var. eximia John Thomas Howell 1929-4-25 4200 Merced 5 miles NE of Merced Comment
  CAS-BOT-BC42033  Draba albertina John Thomas Howell 1949-7-19 25500 Tulare Rock Creek. 3200 Comment
  CAS-BOT-BC41582  Draba breweri John Thomas Howell 1950-7-22 27226 Tulare Sierra Nevada. Summit ridge, Olancha Peak. 3698 Comment
  CAS-BOT-BC41829  Draba breweri John Thomas Howell 1946-7-26 22718 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC41938  Draba monoensis John Thomas Howell 1949-8-9 26179 Tulare Cirque Peak. 3657 Comment
  CAS-BOT-BC41240  Draba oligosperma John Thomas Howell 1946-7-27 22797 a Fresno Northwest of Mono Pass. 3657 Comment
  CAS-BOT-BC41399  Draba verna John Thomas Howell; Gordon H. True 1967-5-7 42189 Plumas Sierra Nevada. Quincy. 1036 Comment
  CAS-BOT-BC311788  Draba verna John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53385 Siskiyou Yreka 792 Comment
  CAS-BOT-BC41400  Draba verna John Thomas Howell 1976-4-2 51574 Plumas Sierra Nevada. 2 miles northwest of Spring Garden. 1173 Comment
  CAS-BOT-BC159562  Drymocallis glandulosa var. glandulosa John Thomas Howell 1956-6-10 31550 San Francisco North slope of Bayview Hills, San Francisco Comment
  CAS-BOT-BC159583  Drymocallis glandulosa var. glandulosa John Thomas Howell 1961-6-21 36628 Plumas Greenville - Sierra Nevada 1097 Comment
  CAS-BOT-BC157883  Drymocallis lactea var. lactea John Thomas Howell 1943-7-16 18425 Nevada Boreal Ridge, West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC158356  Drymocallis lactea var. lactea John Thomas Howell 1940-7-30 15717 Tulare East Lake 2926 Comment
  CAS-BOT-BC159308  Drymocallis lactea var. lactea John Thomas Howell 1960-7-18 35554 Plumas Meadow border, Drakesbad - Lassen Volcanic National Park 1828 Comment
  CAS-BOT-BC143525  Drymocallis pseudorupestris var. crumiana John Thomas Howell 1947-8-9 23963 Inyo Seventh Lake, Big Pine Lakes 3413 Comment
  CAS-BOT-BC163017  Drymocallis pseudorupestris var. saxicola John Thomas Howell 1958-7-23 33794 Fresno Simpson Meadow, Middle Fork of the Kings River - Sierra Nevada 1828 Comment
  RSA3  Dryopteris arguta J. T. Howell 1927-6-24 200 San Bernardino Aliso Canyon, Rancho Santa Ana. 274 Comment
  CAS-BOT-BC428003  Dudleya caespitosa John Thomas Howell 1939-7-2 14833 A Marin Pirates Cove Comment
  CAS-BOT-BC428004  Dudleya caespitosa John Thomas Howell 1946-6-30 22150 Marin Rodeo Lagoon Comment
  UC1176732  Dudleya farinosa John Thomas Howell 1939-7-2 14824 A Marin Elk Valley Comment
  GH387212  Eastwoodia elegans J. T. Howell 1953-4-26 Unknown east end of Corral Hollow Comment
  CAS-BOT-BC197135  Echinochloa crus-galli John Thomas Howell 1962-7-7 38150 Kern Kern River Canyon 304 Comment
  CAS-BOT-BC197260  Echinochloa muricata var. microstachya J. T. Howell 1988-9-29 s.n. Marin Vegetable garden in Terra Linda Comment
  CDA2018  Ehrharta erecta J. T. Howell 1973-1-22 49110 San Francisco Golden Gate Park, near Academy buildings, San Francisco. 0 Comment
  CAS-BOT-BC113755  Eleocharis acicularis var. occidentalis John Thomas Howell 1949-8-6 26086 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC113421  Eleocharis bella John Thomas Howell 1969-9-13 46140 Sierra Near the SW end of Webber Lake. 2072 Comment
  CAS-BOT-BC113440  Eleocharis bella John Thomas Howell 1965-9-13 41377 Fresno Meadow at Grant Grove Lodge. 2011 Comment
  CAS-BOT-BC113508  Eleocharis bella John Thomas Howell 1960-7-22 35879 Plumas Wet meadow, Drakesbad. 1828 Comment
  CAS-BOT-BC113155  Eleocharis palustris John Thomas Howell 1947-7-25 23619 San Bernardino Dry Lake, San Bernardino Mts. 2773 Comment
  CAS-BOT-BC112709  Eleocharis parishii John Thomas Howell; Gordon H. True 1967-9-19 43833 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground, Kern Plateau. 1859 Comment
  CAS-BOT-BC113203  Eleocharis parishii John Thomas Howell 1945-6-18 20973 Lake Near Glenbrook Comment
  CAS-BOT-BC112710  Eleocharis parishii John Thomas Howell; Gordon H. True 1969-9-30 46356 Tulare Burton Camp, Cherry Hill Road, Brush Creek Canyon, Kern Plateau. 1737 Comment
  CAS-BOT-BC112057  Eleocharis quinqueflora John Thomas Howell 1943-7-24 18781 Nevada Frog Lake Comment
  CAS-BOT-BC112151  Eleocharis quinqueflora John Thomas Howell 1948-7-30 25196 Tulare John Muir Trail west of Center Peak. 3200 Comment
  UC698626  Eleocharis quinqueflora John Thomas Howell 1940-8-9 16082 Fresno Bullfrog Lake Comment
  UCD62750  Elymus X hansenii John Thomas Howell 20-23 Jun 1977 52415 Plumas On the peninsula of Lake Almanor. 1371 Comment
  CAS-BOT-BC237637  Elymus X saundersii John Thomas Howell 1947-8-5 23783 Inyo Big Pine Lakes. Fifth Lake 3352 Comment
  GH365154  Elymus X saundersii J. T. Howell 1944-8-7 20067 Unknown Flats northeast of highway bridge, Tuolumne Meadows Comment
  SEINET196518  Elymus X saundersii John Thomas Howell 1945-9-27 21519 Tuolumne Mt. Dana, 10,500 ft. Tuolmne Co. Comment
  UC1106121  Elymus californicus John Thomas Howell 1941-7-6 16356 Marin Mount Tamalpais, Kent Trail Mount Tamalpais; , Kent Trail Comment
  CAS-BOT-BC225743  Elymus elymoides John Thomas Howell 1969-8-25 45915 A Tulare Near site of former store, Mineral King, Sierra Nevada 2377 Comment
  CAS-BOT-BC225744  Elymus elymoides John Thomas Howell 1949-7-22 25597 Tulare Mt. Guyot 3749 Comment
  CAS-BOT-BC227932  Elymus elymoides John Thomas Howell 1960-8-19 36165 Tehama Lassen Volcanic National Park. Brokeoff Mt. Trail 2682 Comment
  RSA44079  Elymus elymoides J. T. Howell 1947-8-5 23784 Inyo Fifth Lake, Big Pine Lakes. 3354 Comment
  UCD61543  Elymus elymoides John Thomas Howell 1944-8-9 20177 Tuolumne Near Parsons Lodge, Tuolumne Meadows. Comment
  SEINET11690147  Elymus glaucus J. T. Howell, Knight, W.; Knight, I. 1987-1 6229 Sonoma Todd Road Preserve 24 Comment
  CAS-BOT-BC203770  Elymus glaucus subsp. glaucus John Thomas Howell 1951-7-18 27871 Tulare Mineral King and Vicinity. Franklin Pass Trail 2438 Comment
  CAS-BOT-BC206516  Elymus glaucus subsp. glaucus John Thomas Howell; Gordon H. True 1967-7-9 43256 Plumas North Fork of Feather River 4.3 miles southwest of Caribou - Sierra Nevada 792 Comment
  CAS-BOT-BC203807  Elymus glaucus subsp. virescens John Thomas Howell 1943-7-4 18249 Marin Ledum Swamp on road to Point Reyes Comment
  UCD62575  Elymus repens John Thomas Howell 1956-7-1 31658 San Francisco 3rd and 4th streets, San Francisco. Comment
  UCD51690  Elymus spicatus John Thomas Howell 1976-7-20 52002 Lassen about 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek. 1432 Comment
  CAS-BOT-BC204258  Elymus trachycaulus subsp. subsecundus John Thomas Howell 1958-7-22 33774 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC204368  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1944-8-10 20271 Mono Glacier Canyon, Mt. Dana Comment
  CAS-BOT-BC213518  Elymus trachycaulus subsp. trachycaulus John Thomas Howell; Gordon H. True 1967-9-19 43866 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground, Kern Plateau - Sierra Nevada 1859 Comment
  SEINET7292779 Image available Elysitanion hansenii John Thomas Howell 1969-1 46039 Tulare Sierra Nevada; Mineral King; Near the pack station 2377 Comment
  CAS-BOT-BC81518  Ephedra californica John Thomas Howell 1970-11-7 47498 Kern mouth of Kern River Canyon 213 Comment
  CAS-BOT-BC81527  Ephedra californica John Thomas Howell 1962-7-7 38139 Kern Entrance to Kern River Canyon 213 Comment
  CAS-BOT-BC81602  Ephedra californica John Thomas Howell 1928-3-11 3409 San Bernardino east end of Morongo Valley, s. Mojave Desert 914 Comment
  GH356629  Ephedra nevadensis J. T. Howell 1958-5-28 33557 Unknown Bishop Creek 1950 Comment
  CAS-BOT-BC81942  Ephedra viridis John Thomas Howell 1928-5-25 3824 Kern Frazier Mt. Park, Mt. Pinos region Comment
  CAS-BOT-BC165897  Epilobium John Thomas Howell 1963-8-20 40196 Inyo Whitney Portal road 2346 Comment
  RSA510  Epilobium canum subsp. canum J. T. Howell 1928-6-30 1025 Ventura Santa Susana Pass. 457 Comment
  RSA511  Epilobium canum subsp. canum J. T. Howell 1927-7-26 480 Orange Claymine Canon near Sierra Peak. 244 Comment
  RSA515  Epilobium canum subsp. canum J. T. Howell 1927-8-16 2993 Santa Barbara Gaviota Pass 46 Comment
  RSA31381  Epilobium foliosum J. T. Howell 1944-5-21 19486 Marin Canyon below Phoenix Lake, Mt. Tamalpais Comment
  RSA34674  Epilobium lactiflorum J. T. Howell 1946-7-23 22678 Fresno Fourth Recess. 3049 Comment
  CAS-BOT-BC57133  Equisetum X ferrissii John Thomas Howell; Gordon H. True 1966-7-10 41595 Tulare On bank of Kern River at Roads End 1066 Comment
  CAS-BOT-BC57007  Equisetum arvense John Thomas Howell 1977-6-21 52385 Plumas Seneca 1097 Comment
  CAS-BOT-BC57023  Equisetum arvense John Thomas Howell 1957-9-16 32963 San Francisco Strybing Arboretum, Golden Gate Park Comment
  CAS-BOT-BC57906  Equisetum arvense John Thomas Howell 1944-5-28 19516 Marin Between Manzanita and Almonte. Comment
  CAS-BOT-BC57272  Equisetum laevigatum John Thomas Howell 1958-5-28 33611 Inyo Bishop Creek 1524 Comment
  CAS-BOT-BC57384  Equisetum laevigatum John Thomas Howell 1927-6-6 2441 Orange Santa Ana River bottom, Santa Ana Canyon 152 Comment
  CAS-BOT-BC57238  Equisetum laevigatum John Thomas Howell 1930-4-13 4691 Calaveras North Fork of Calaveras River 2 miles west of San Andreas Comment
  SEINET6031530  Equisetum laevigatum J. T. Howell, G. H. True, Jr. 1968-6-10 44548 Plumas Quincy 1036 Comment
  CAS-BOT-BC213555  Eragrostis hypnoides John Thomas Howell 1976-10-29 52272 El Dorado Bottom of Folsom Lake at Brown's Ravine boat landing - Sierra Nevada 121 Comment
  CAS-BOT-BC204554  Eragrostis mexicana subsp. virescens John Thomas Howell 1958-5-23 33216 Inyo Lone Pine 1127 Comment
  CAS-BOT-BC204599  Eragrostis mexicana subsp. virescens John Thomas Howell 1977-8-11 52669 Plumas Canyon of Little Last Chance Creek between Chilcoot and Frenchmans Reservoir 1676 Comment
  SEINET12875575 Image available Eremogone congesta var. subcongesta John Thomas Howell 1977-1 52401 Lassen North end of Eagle Lake 1585 Comment
  CAS-BOT-BC174280  Eremogone congesta var. suffrutescens John Thomas Howell 1949-8-12 26253 Inyo Cottonwood Creek 3108 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-BC514499  Eriastrum eremicum subsp. eremicum John Thomas Howell 1927-7-9 2669 San Bernardino Between Deadman's Point and Box S Ranch, Mojave Desert 914 Comment
  CAS-BOT-BC286684  Ericameria bloomeri John Thomas Howell 1951-8-21 28260 Sierra East side of Yuba Pass 1828 Comment
  RSA201300  Ericameria bloomeri J. T. Howell 1960-8-20 36282 Plumas Kelly Camp, near Drakesbad. 1616 Comment
  CAS-BOT-BC135992  Ericameria cooperi var. cooperi John Thomas Howell 1962-5-21 37239 Kern East side of Walker Pass - Sierra Nevada 1402 Comment
  CAS-BOT-BC136013  Ericameria cooperi var. cooperi John Thomas Howell 1958-5-26 33467 Inyo 4 miles w. of Independence - Sierra Nevada 1524 Comment
  CAS-BOT-BC286740  Ericameria cuneata var. cuneata John Thomas Howell 1962-9-21 38676 Kern Kern River Canyon 304 Comment
  CAS-BOT-BC286766  Ericameria cuneata var. cuneata John Thomas Howell 1931-10-11 8144 Mariposa Wawona Point Comment
  CAS-BOT-BC292852  Ericameria cuneata var. cuneata John Thomas Howell; Gordon H. True 1967-5-29 42362 Tulare Near north end of Lamont Meadow on road to Chimney Meadow, Kern Plateau, Sierra Nevada 1859 Comment
  CAS-BOT-BC298944  Ericameria nauseosa var. ceruminosa John Thomas Howell 1967-11-6 44177 Kern 4.5 miles W of Wofford, Greenhorn Mts 1219 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
  CAS-BOT-BC298017  Ericameria nauseosa var. mohavensis John Thomas Howell 1927-11-12 3189 Kern Red Rock Canyon 762 Comment
  CAS-BOT-BC299145  Ericameria nauseosa var. mohavensis John Thomas Howell 1970-11-8 47506 Kern S slope above E arm of Lake Isabella, 6.5 miles from South Fork Kern RIver bridge on road from Weldon to Kernville 792 Comment
  CAS-BOT-BC298099  Ericameria nauseosa var. mohavensis John Thomas Howell; Gordon H. True 1969-9-29 46264 Tulare Kern Plateau. Cherry Hill Rd at Rincon Trail, Brush Creek Canyon 1432 Comment
  CAS-BOT-BC294186  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True 1973-8-1 50216 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  CAS-BOT-BC294326  Ericameria nauseosa var. speciosa John Thomas Howell 1949-7-30 25920 Tulare At Tunnel 2743 Comment
  CAS-BOT-BC294210  Ericameria nauseosa var. speciosa John Thomas Howell 1965-9-15 41388 Mono Near top of Conway Grade 2438 Comment
  CAS-BOT-BC293046  Ericameria parryi var. vulcanica John Thomas Howell 1962-9-24 38861 Kern Near Tiger Flat, Greenhorn Mountains 1981 Comment
  CAS-BOT-BC293107  Ericameria parryi var. vulcanica John Thomas Howell 1950-7-25 27338 A Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC293112  Ericameria parryi var. vulcanica John Thomas Howell 1950-7-17 26999 Tulare Trail from Bakeoven to Templeton Meadows 2682 Comment
  UC904952  Ericameria parryi var. vulcanica John Thomas Howell 1949-7-26 25798 Tulare Sierra Nevada, Golden Trout Creek 2941 Comment
  CAS-BOT-BC293322  Ericameria teretifolia John Thomas Howell 1964-10-23 40994 Inyo Sierra on Whitney Portal road 1950 Comment
  JEPS75285  Ericameria teretifolia John Thomas Howell 1964-10-23 40994 Inyo on Whitney Portal road, apron of Sierra Sierra Nevada 1950 Comment
  CAS-BOT-BC293426  Erigeron algidus John Thomas Howell 1946-7-15 22380 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC293497  Erigeron aliceae John Thomas Howell 1939-8-2 14879 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC294663  Erigeron breweri var. breweri John Thomas Howell 1942-8-5 17705 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  CAS-BOT-BC294682  Erigeron breweri var. breweri John Thomas Howell 1924-7-28 542 Mariposa Buck Camp Trail between Chilnualna Creek and Johnson Lake, Yosemite Park Comment
  CAS-BOT-BC296748  Erigeron coulteri John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54508 Mono Rock Creek Road to Rock Creek Lake Basin, Sierra Nevada 2849 Comment
  CAS-BOT-BC234207  Erigeron divergens John Thomas Howell 1937-7-21 13223 Trinity Big Flat Comment
  UCD131896  Erigeron floribundus John Thomas Howell 1975-9-25 51508 San Mateo San Bruno Mountain. 396 Comment
  RSA834  Erigeron foliosus J. T. Howell 1927-7-10 369 San Bernardino Big Bear, San Bernardino Mountains. 1828 Comment
  CAS-BOT-BC308778  Erigeron foliosus var. foliosus John Thomas Howell; Gordon H. True 1967-8-8 43559 Tulare 5.7 miles from Lamont Meadow on road to Long Valley, Kern Plateau, Sierra Nevada 1584 Comment
  CAS-BOT-BC300875  Erigeron glacialis var. glacialis John Thomas Howell 1948-7-26 25011 Tulare Bubbs Creek Canyon 3139 Comment
  CAS-BOT-BC295140  Erigeron inornatus John Thomas Howell 1943-8-4 19036 Glenn Summit ridge north of Black Butte Comment
  CAS-BOT-BC295488  Erigeron lassenianus var. lassenianus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54168 Plumas 3.25 miles west of Round Valley Reservoir dam 1633 Comment
  CAS-BOT-BC295232  Erigeron lonchophyllus John Thomas Howell 1948-7-29 25169 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC295260  Erigeron lonchophyllus John Thomas Howell 1949-8-13 26260 Inyo Little Cottonwood Creek 3048 Comment
  POM260848  Erigeron lonchophyllus J. T. Howell 1940-7-30 15727 Tulare East Lake 2927 Comment
  CAS-BOT-BC295740  Erigeron petrophilus var. petrophilus John Thomas Howell 1942-7-12 17034 Marin Northside Trail, Mt. Tamalpais Comment
  CAS-BOT-BC49585  Erigeron pumilus subsp. intermedius John Thomas Howell 1934-7-1 12320 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC300319  Erigeron vagus John Thomas Howell 1946-7-18 22509 Fresno West slope of Mt. Starr Comment
  SBBG28207  Eriogonum angulosum J. T. Howell 1933-8-18 11588 Monterey 6 mi W of Jamesburg Comment
  CAS-BOT-BC248101  Eriogonum angulosum John Thomas Howell 1932-10-16 10833 Alameda 8 miles from Livermore on Tesla Road Comment
  CAS-BOT-BC248491  Eriogonum angulosum John Thomas Howell 1933-8-18 11588 Monterey 6 miles west of Jameburg [Jamesburg], Santa Lucia Mts. Comment
  CAS-BOT-BC248759  Eriogonum argillosum John Thomas Howell 1933-4-23 11158 San Benito 11 miles from Hernandez, on road to San Benito Comment
  CAS-BOT-BC254170  Eriogonum baileyi var. baileyi John Thomas Howell 1962-5-21 37181 Kern Northeast of Lake Isabella, Sierra Nevada 792 Comment
  CAS-BOT-BC241609  Eriogonum baileyi var. baileyi John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54438 Mono Walker 1645 Comment
  CAS-BOT-BC241610  Eriogonum baileyi var. baileyi John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54439 Mono East side of Bridgeport Reservoir, 1.5 miles north of Bridgeport 1969 Comment
  CAS-BOT-BC250066  Eriogonum compositum var. compositum John Thomas Howell 1939-8-2 14869 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC256117  Eriogonum deflexum var. deflexum John Thomas Howell 1928-11-4 4083 Riverside Hidden Spring Canyon, 13 miles se of Mecca Comment
  CAS-BOT-BC246497  Eriogonum douglasii var. meridionale John Thomas Howell; Gordon H. True 1972-5-12 7128 Nevada Boca-Stampede Dam Road, 5.2 miles north of Boca 1767 Comment
  UC517496  Eriogonum elongatum var. elongatum John Thomas Howell 1933-8-17 11529 San Benito The Pinnacles Comment
  UC1042553  Eriogonum esmeraldense John Thomas Howell 1950-8-29 27459 Mono summit between Crestview and Mono Lake; Sierra Nevada 2438 Comment
  CAS-BOT-BC253215  Eriogonum fasciculatum var. fasciculatum John Thomas Howell 1928-4-21 3750 Ventura Pt. Mugu Comment
  A364117  Eriogonum fasciculatum var. foliolosum J. T. Howell 1933-8-18 11567 Unknown 17 miles east of Jamesburg, Santa Lucia Mts. Comment
  CAS-BOT-BC253377  Eriogonum fasciculatum var. polifolium John Thomas Howell 1927-6-12 2530 San Bernardino Half way between Victorville and Hesperia, Mojave Desert 822 Comment
  CAS-BOT-BC250387  Eriogonum gracile John Thomas Howell 1929-7-20 4330 Contra Costa 2 miles s. of Oakley Comment
  CAS-BOT-BC250406  Eriogonum gracile John Thomas Howell 1933-8-18 11561 A Monterey 6 miles w. of Greenfield, Santa Lucia Mts. Comment
  RSA230  Eriogonum gracile var. gracile J. T. Howell 1927-7-24 471 Orange Claymine Canyon near Sierra Peak. 183 Comment
  RSA231  Eriogonum gracile var. gracile J. T. Howell 1928-6-30 1021 Ventura Santa Susana Pass. 457 Comment
  CAS-BOT-BC259552  Eriogonum hirtiflorum John Thomas Howell; Gordon H. True 1966-7-13 41867 Tulare Brush Creek Canyon Grade on Cherry Hill Road, Sierra Nevada 1645 Comment
  UC1042376  Eriogonum hirtiflorum John Thomas Howell 1952-10-28 28903 Tulare Eleven Range View Point Sierra Nevada, Sequoia National Park, Eleven Range View Poin 1584 Comment
  CAS-BOT-BC252867  Eriogonum incanum John Thomas Howell 1949-7-22 25622 Tulare Mt. Guyot 3657 Comment
  POM180770  Eriogonum latifolium J. T. Howell 1930-7-27 5414 Sonoma Exposed ocean bluff, 4 miles N of Bodega Bay. Comment
  RSA44423  Eriogonum lobbii J. T. Howell 1947-8-6 s.n. Inyo Summit Lake; (moraine above), Big Pine Lakes. 3415 Comment
  CAS-BOT-BC259411  Eriogonum luteolum John Thomas Howell 1930-8-24 5459 Lake 2 miles from Middletown on road to Adams Springs Comment
  GH364289  Eriogonum luteolum J. T. Howell 1938-7-3 13944 A Unknown Serpentine slope at head of Lucas Valley Comment
  POM203848  Eriogonum luteolum J. T. Howell 1934-6-17 12244 Glenn 4 miles south of Orland Comment
  CAS-BOT-BC259504  Eriogonum luteolum var. caninum John Thomas Howell 1927-8-22 3037 Marin Rock Spring Trail, west of West Point, Mt. Tamalpais 548 Comment
  CAS-BOT-BC263101  Eriogonum maculatum John Thomas Howell 1962-5-21 37213 Kern East side of Walker Pass 1466 Comment
  CAS-BOT-BC268787  Eriogonum mohavense John Thomas Howell 1930-5-12 4890 Los Angeles 2 miles north of Palmdale, Mojave Desert Comment
  CAS-BOT-BC261346  Eriogonum nudum var. deductum John Thomas Howell 1950-7-21 27163 Tulare Monache Mt. 2590 Comment
  CAS-BOT-BC261442  Eriogonum nudum var. nudum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53024 Calaveras Near Dorrington 1524 Comment
  CAS-BOT-BC264832  Eriogonum nudum var. nudum John Thomas Howell 1955-6-13 30337 Trinity 6 miles southwest of Douglas City 609 Comment
  CAS-BOT-BC261603  Eriogonum nudum var. nudum John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-25 54314 Plumas Near Englemine on Diamond Mt. road northeast of Taylorsville 1219 Comment
  CAS-BOT-BC269751  Eriogonum nudum var. oblongifolium John Thomas Howell 1937-7-30 13699 Trinity Junction City Comment
  CAS-BOT-BC269872  Eriogonum nudum var. pubiflorum John Thomas Howell 1947-8-15 24131 Inyo Fourth Lake, Big Pine Lakes 3291 Comment
  SD22295  Eriogonum nudum var. pubiflorum John Thomas Howell 1929-11-29 4545 Mariposa 5 miles from Mt. Bullion on road to Cathay's Valley Comment
  CAS-BOT-BC266781  Eriogonum nudum var. scapigerum John Thomas Howell 1949-7-23 25637 Tulare Soldier Lake 3352 Comment
  CAS-BOT-BC258559  Eriogonum nummulare John Thomas Howell 1958-5-28 33546 Inyo Bishop Creek 1950 Comment
  CAS-BOT-BC266824  Eriogonum ordii John Thomas Howell 1963-6-22 39509 Monterey Near summit of Mustang Grade east of San Lorenzo Creek Comment
  SBBG28241  Eriogonum ordii J. T. Howell 1937-5-20 12974 San Benito 8 mi E of Paicines Comment
  CAS-BOT-BC258711  Eriogonum ovalifolium var. nivale John Thomas Howell 1940-8-2 15920 Tulare West of Reflection Lake 3505 Comment
  RSA235  Eriogonum parishii J. T. Howell 1927-7-10 358 San Bernardino Big Bear Lake. 2043 Comment
  CAS-BOT-BC257867  Eriogonum parvifolium John Thomas Howell 1929-10-11 4452 Monterey Pt. Lobos Comment
  RSA219  Eriogonum plumatella var. jaegeri J. T. Howell 1927-4-1 535 San Bernardino Morongo Valley 915 Comment
  CAS-BOT-BC258099  Eriogonum polypodum John Thomas Howell 1942-7-31 17496 Tulare Chagoopa Plateau Comment
  CAS-BOT-BC258150  Eriogonum pusillum John Thomas Howell; Gordon H. True 1967-5-30 42451 Tulare About 1.5 miles from Lamont Meadow on road to Long Valley, Kern Plateau 1737 Comment
  RSA285064  Eriogonum pusillum J. T. Howell 1958-5-28 s.n. Inyo Bishop Creek. 1951 Comment
  CAS-BOT-BC258501  Eriogonum roseum John Thomas Howell 1970-11-8 47509 Kern Above east arm of Lake Isabella, 6.5 miles from South Fork Kern River bridge on road from Weldon to Kernville 792 Comment
  CAS-BOT-BC267689  Eriogonum roseum John Thomas Howell; Gordon H. True 1966-7-13 41872 Tulare Brush Creek Canyon Grade on Cherry Hill Road, Sierra Nevada 1402 Comment
  CAS-BOT-BC268327  Eriogonum roseum John Thomas Howell 1962-9-26 38945 Kern 2.5 miles east of Glennville, Greenhorn Mountains 1066 Comment
  CAS-BOT-BC268451  Eriogonum saxatile John Thomas Howell 1963-8-20 40197 Inyo Whitney Portal road 2346 Comment
  CAS-BOT-BC268606  Eriogonum spergulinum var. pratense John Thomas Howell 1950-7-22 27180 Tulare Olancha Peak 3261 Comment
  CAS-BOT-BC271880  Eriogonum spergulinum var. spergulinum John Thomas Howell 1958-8-9 34248 Madera Miller Meadow 2103 Comment
  CAS-BOT-BC271950  Eriogonum spergulinum var. spergulinum John Thomas Howell; Gordon H. True 1966-7-11 41719 Tulare Horse Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC271892  Eriogonum spergulinum var. spergulinum John Thomas Howell 1958-7-20 33682 Fresno Lower Tent Meadow, Copper Creek Canyon 2377 Comment
  CAS-BOT-BC262768  Eriogonum strictum var. proliferum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50658 Lassen Summit ridge of Diamond Mt. 2346 Comment
  CAS-BOT-BC267826  Eriogonum umbellatum var. bahiiforme John Thomas Howell 1943-8-10 19265 Glenn Black Butte Comment
  CAS-BOT-BC268011  Eriogonum umbellatum var. furcosum John Thomas Howell 1958-8-17 34552 Madera The Niche, East Fork of Granite Creek 2438 Comment
  CAS-BOT-BC268222  Eriogonum umbellatum var. munzii John Thomas Howell 1927-7-9 2721 San Bernardino South end of Baldwin Lake, San Bernardino Mts. 2011 Comment
  CAS-BOT-BC262098  Eriogonum umbellatum var. nevadense John Thomas Howell 1942-7-25 17144 Tulare Mineral King Comment
  CAS-BOT-BC265185  Eriogonum umbellatum var. nevadense John Thomas Howell; Gordon H. True 1971-7-15 48544 Tulare On Dome Lands Trail about 0.5 miles south of Church Dome, Kern Plateau, Sierra Nevada 2316 Comment
  SEINET5331927  Eriogonum umbellatum var. nevadense J. T. Howell 1963-8-22 40270 Mono 2.5 miles south of Crestview. Comment
  CAS-BOT-BC265212  Eriogonum umbellatum var. speciosum John Thomas Howell 1951-8-19 28160 Butte 2 miles west of Pulga, Sierra Nevada 365 Comment
  CAS-BOT-BC262363  Eriogonum vimineum John Thomas Howell 1934-6-10 11893 Lassen Horse Lake Comment
  CAS-BOT-BC264136  Eriogonum vimineum John Thomas Howell 1951-8-20 28202 Plumas Indian Valley, Sierra Nevada 1066 Comment
  CAS-BOT-BC261852  Eriogonum wrightii var. subscaposum John Thomas Howell 1940-8-10 16140 Fresno Zumwalt Meadows, Kings River Canyon Comment
  CAS-BOT-BC298462  Eriophyllum ambiguum var. paleaceum John Thomas Howell 1958-5-23 33200 Kern 10 miles E of Onyx 1036 Comment
  UC517524  Eriophyllum ambiguum var. paleaceum John Thomas Howell 1930-5-13 5403 Kern 7 mi above Kernville; Kern Canyon 844 Comment
  CAS-BOT-BC297394  Eriophyllum confertiflorum John Thomas Howell 1927-6-12 2537 San Bernardino Near Cajon Pass summit, old road to Hesperia 1097 Comment
  CAS-BOT-BC297867  Eriophyllum confertiflorum John Thomas Howell; Gordon H. True 1971-6-15 47717 Kern 0.5 mile S of Bodfish on road to Havilah 1097 Comment
  CAS-BOT-BC297907  Eriophyllum confertiflorum John Thomas Howell 1930-5-13 5027 Kern Kern Canyon, 7 miles above Kernville 844 Comment
  UCD132123  Eriophyllum jepsonii John Thomas Howell 1950-7-5 26636 Contra Costa above Nortonville. Comment
  CAS-BOT-BC301392  Eriophyllum lanatum var. grandiflorum John Thomas Howell; R. C. Barneby 1954-5-12 29504 Mariposa Near top of Bagby Grade 579 Comment
  RSA44445  Eriophyllum lanatum var. integrifolium J. T. Howell 1947-8-11 23992 Inyo Baker Lakes 3506 Comment
  POM259748  Eryngium aristulatum var. aristulatum J. T. Howell 1934-3-26 11806 Sonoma Summit of Bennet Valley road from Glen Ellen to Santa Rosa Comment
  UC874916  Eryngium articulatum John Thomas Howell 1938-8-28 14589 Solano near Suisun (Suisun Marshes); ; <Note on label: Topotype; not in Types Database> Comment
  CAS-BOT-BC211104  Eryngium pinnatisectum John Thomas Howell 1962-6-15 37419 Butte 5 miles west of Oroville Comment
  GH379380  Erysimum capitatum J. T. Howell 1938-4-10 13746 Unknown Near Midway Comment
  CAS-BOT-BC58573  Erysimum capitatum var. capitatum John Thomas Howell 1934-6-30 12285 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC55123  Erysimum perenne John Thomas Howell 1940-8-1 15860 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC153806  Erythranthe filicaulis John Thomas Howell 1975-6-4 51029 Tuolumne Ackerson Meadow south of Mather 1524 Comment
  CAS-BOT-BC150231  Erythranthe nasuta John Thomas Howell 1967-6-23 42733 Plumas Lewisia Rock 3.5 miles sw. of Belden, Feather River Canyon 609 Comment
  CAS-BOT-BC505243  Erythronium grandiflorum John Thomas Howell 1951-6-28 27684 Plumas Eureka Park 2133 Comment
  CAS-BOT-BC403282  Eschscholzia californica John Thomas Howell 1965-6-15 41347 Monterey Near the Monterey Airport on Salinas road about 4 miles east of Monterey Comment
  CAS-BOT-BC403331  Eschscholzia californica John Thomas Howell 1963-6-22 39570 Monterey Priest Valley 685 Comment
  CAS-BOT-BC403715  Eschscholzia californica John Thomas Howell 1955-6-12 30322 Trinity Weaverville 609 Comment
  RSA22047  Eschscholzia californica var. peninsularis J. T. Howell 1938-4-10 13759 San Joaquin Hospital Canyon Comment
  CAS-BOT-BC76452  Eschscholzia lemmonii John Thomas Howell 1963-6-21 39493 Monterey Mustang Creek east of San Lorenzo Creek. Comment
  CAS-BOT-BC170785  Eucnide urens John Thomas Howell 1928-6-16 3960 Inyo Surprise Canyon, Panamint Mts. 975 Comment
  CAS-BOT-BC206914  Euonymus occidentalis Thomas Howell 1880-6-1 s.n. Unknown Unspecified Comment
  CDA4818  Euphorbia helioscopia J. T. Howell 1946-4-5 21595 San Francisco Southeast slope of Twin Peaks, San Francisco. 0 Comment
  CAS-BOT-BC202401  Euphorbia ocellata John Thomas Howell 1962-6-2 37413 Merced Merced Comment
  CAS-BOT-BC207104  Euphorbia ocellata John Thomas Howell; Gordon H. True 1967-7-6 43218 Tulare From northern 1/3 of area, Vernal pool natural area in Valley Grassland, about 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC310547  Eurybia integrifolia John Thomas Howell 1969-9-13 46126 Sierra North shore of Webber Lake 2064 Comment
  CAS-BOT-BC310555  Eurybia integrifolia John Thomas Howell 1969-8-27 45986 Tulare Near Mineral King in Glacial Valley below White Chief Mine 2895 Comment
  CAS-BOT-BC312179  Eurybia radulina John Thomas Howell 1957-7-28 32826 San Francisco Bayview Hills, San Francisco Comment
  RSA942  Euthamia occidentalis J. T. Howell 1927-10-22 765 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC413862  Fallopia convolvulus John Thomas Howell 1962-6-15 37463 Butte Magalia 731 Comment
  CAS-BOT-BC278467  Festuca idahoensis John Thomas Howell; Gordon H. True 1973-7-31 50101 Plumas Summit ridge of Thompson Peak, Diamond Range 2194 Comment
  SBBG39997  Festuca myuros var. hirsuta J. T. Howell 1963-7-12 El Dorado 3 mi SW of Twin Bridges on rd to Kyburz 1676 Comment
  CAS-BOT-BC278874  Festuca occidentalis John Thomas Howell 1937-7-22 13259 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC278905  Festuca occidentalis John Thomas Howell 1953-5-25 29039 Tuolumne Twain Harte 1127 Comment
  UC1106094  Festuca roemeri John Thomas Howell 1943-5-15 18084 Marin Tiburon Peninsula Comment
  UCD66276  Festuca roemeri John Thomas Howell 1956-6-17 31564 San Francisco Summit ridge of Bayview Hills. Comment
  CAS-BOT-BC278581  Festuca saximontana John Thomas Howell 1947-7-23 23554 San Bernardino Dollar Lake, San Bernardino Mts. 2865 Comment
  CAS-BOT-BC282554  Festuca viridula John Thomas Howell 1943-7-23 18720 Nevada Between Donner Pass and West Lake Comment
  RSA1066  Forestiera pubescens J. T. Howell 1927-8-17 645 Monterey Bradley 165 Comment
  CAS-BOT-BC453526  Fragaria chiloensis John Thomas Howell 1926-2-21 1636 Marin Ocean bluffs at Point Reyes Comment
  CAS-BOT-BC457934  Fragaria vesca subsp. californica John Thomas Howell 1945-6-3 20931 Marin Shell Beach Comment
  A425903  Frangula californica J. T. Howell 1938-7-3 13955 Unknown 3 miles n. of Sebastopol Comment
  CAS-BOT-BC52585  Frangula californica subsp. californica John Thomas Howell 1966-5-25 41546 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC53910  Frangula californica subsp. cuspidata John Thomas Howell; Gordon H. True 1967-9-18 43785 Tulare Sierra Nevada - Kern Plateau - Hillside spring, Lamont Meadow 1645 Comment
  CAS-BOT-BC53970  Frangula californica subsp. cuspidata John Thomas Howell 1970-9-22 47275 Kern Sierra Nevada - Along kern River between kernville and River Kern 822 Comment
  CAS-BOT-BC53444  Frangula californica subsp. tomentella John Thomas Howell 1930-10-12 5572 El Dorado 4 miles n. of Placerville Comment
  CAS-BOT-BC62921  Frangula californica subsp. tomentella John Thomas Howell 1930-9-28 5490 Contra Costa Marsh Creek Rd., e. of Clayton. Comment
  CAS-BOT-BC55684  Frangula purshiana John Thomas Howell 1963-6-3 39395 Plumas Butterfly Valley Comment
  CAS-BOT-BC55811  Frangula rubra subsp. yosemitana John Thomas Howell 1923-7-2 107 Mariposa Stella Lake, Wawona 1219 Comment
  CAS-BOT-BC223665  Frankenia salina John Thomas Howell; Gordon H. True 1967-8-10 43705 Tulare From northern 1/3 of area. About 4 1/2 miles east-northeast of Pixley 83 Comment
  RSA244714  Frankenia salina J. T. Howell, G. H. True 1972-6-29 48919 Contra Costa On Byron Hot Springs Road SE of Byron. Comment
  CAS-BOT-BC217700  Fraxinus latifolia John Thomas Howell 1962-7-9 38362 Kern Kern river bottom just below Isabella Dam, Sierra Nevada 762 Comment
  CAS-BOT-BC504437  Fritillaria atropurpurea John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49174 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  CAS-BOT-BC504567  Fritillaria atropurpurea John Thomas Howell 1943-7-20 18601 Nevada Castle Peak Comment
  CAS-BOT-BC505272  Fritillaria atropurpurea John Thomas Howell 1939-8-2 14896 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC130485  Fritillaria purdyi John Thomas Howell 1931-4-4 6166 Napa Crater Country, Mt. St. Helena region Comment
  GH385706  Galium angustifolium J. T. Howell 1928-5-19 3792 Unknown Anacapa Island Comment
  CAS-BOT-BC124041  Galium angustifolium subsp. foliosum John Thomas Howell 1928-5-19 3792 Ventura Anacapa Island Comment
  GH385836  Galium bolanderi J. T. Howell 1943-8-12 19305 Unknown Canyon of Snow Basin Creek Comment
  JEPS24064  Galium bolanderi John Thomas Howell 1958-7-25 33917 Fresno Simpson Meadow Sierra Nevada, Middle Fork of Kings River 1828 Comment
  GH385786  Galium californicum J. T. Howell 1931-5-25 6544 Unknown Santa Barbara, Mission Ridge Comment
  RSA67159  Galium californicum subsp. californicum J. T. Howell 1930-6-8 5246 Sonoma 1 mile east of Bodega Bay Comment
  CAS-BOT-BC217490  Galium clementis John Thomas Howell 1965-5-11 41317 Monterey East slope of Cone Peak, Santa Lucia Range 1298 Comment
  RSA51416  Galium hilendiae J. T. Howell 1949-7-17 25372 Inyo Wonoga Peak. 2591 Comment
  CAS-BOT-BC217551  Galium hypotrichium subsp. inyoense John Thomas Howell 1950-7-12 26697 Inyo Sage Flat to Olancha Pass 2438 Comment
  JEPS58896  Galium trifidum var. pusillum John Thomas Howell 1959-9-23 34886 Lassen n end of lake Lassen Volcanic National Park, Juniper Lake 2057 Comment
  CAS-BOT-BC303431  Gamochaeta ustulata John Thomas Howell 1963-5-18 39346 Monterey Near Aromas Comment
  CAS-BOT-BC186359  Garrya flavescens John Thomas Howell 1955-5-19 30188 Monterey Ridge between Reliz & Bear canyons, Santa Lucia Mts. 1158 Comment
  CAS-BOT-BC186360  Garrya flavescens John Thomas Howell 1955-5-18 30187 A Monterey West of saddle between Junipero Serra & Pinyon peaks, Santa Lucia Mts. 1463 Comment
  RSA539  Garrya veatchii J. T. Howell 1927-6-11 93 San Bernardino Between Cajon Pass and Hesperia 1067 Comment
  CAS-BOT-BC282629  Gastridium phleoides John Thomas Howell 1946-5-16 s.n. Marin Angel Island Comment
  UC1106136  Gastridium ventricosum John Thomas Howell 1940-5-26 Marin San Anselmo Canyon Comment
  CAS-BOT-BC58885  Gaultheria shallon John Thomas Howell 1947-5-8 23144 Marin Sausalito Comment
  CAS-BOT-BC478866  Gayophytum John Thomas Howell; Gordon H. True 1967-9-18 43752 Tulare 2 miles from Chimney Meadow on road to Lamont Meadow 1950 Comment
  RSA51423  Gayophytum diffusum subsp. parviflorum J. T. Howell 1949-7-29 25868 Tulare Tunnel to Groundhog Meadow. 2683 Comment
  UC1042513  Gayophytum racemosum John Thomas Howell 1951-7-16 27786 Tulare Mineral King Mineral King and vicinity 2377 Comment
  CAS-BOT-BC303597  Geraea canescens John Thomas Howell 1928-4-1 3582 San Bernardino 1.5 miles S of Silver Lake, N Mojave Desert Comment
  CAS-BOT-BC457020  Geum macrophyllum John Thomas Howell 1948-7-22 24885 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC459636  Geum macrophyllum John Thomas Howell 1940-7-30 15718 Tulare East Lake 2926 Comment
  CAS-BOT-BC459642  Geum macrophyllum John Thomas Howell; Gordon H. True 1966-7-11 41659 Tulare Poison Meadow, Kern PLateau 2286 Comment
  CAS-BOT-BC214673  Geum triflorum John Thomas Howell 1934-7-3 12378 Modoc 5 mi. S of Hackamore. Comment
  UCR74666  Gilia capitata subsp. abrotanifolia J. T. Howell, G. H. True 1968-5-13 44318 Tulare Sierra Nevada Mtns., Kern Plateau, Cherry Hill Rd., Brush Creek Canyon 1585 Comment
  SD135572  Gilia interior John Thomas Howell, Gordon H. True 1967-5-29 42354 Tulare Sierra Nevada. Kern Plateau, midway between Chimney and Lamont meadows. 1890 Comment
  JEPS33702  Gilia leptantha subsp. leptantha John Thomas Howell 1927-7-9 2705 San Bernardino near Whiskey Spring (Cushenberry Road, desert side San Bernardino Mts.); desert side San Bernardino Mts., nr Whiskey Spring 1676 Comment
  SBBG104018  Gilia leptantha subsp. purpusii J. T. Howell 1967-5-18 51726 Kern old rd from Alta Sierra to Wofford Heights Comment
  CAS-BOT-BC402087  Gilia ochroleuca subsp. bizonata John Thomas Howell; Gordon H. True 1967-7-3 42873 Tulare Rockhouse Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC266594  Githopsis pulchella John Thomas Howell 1962-6-15 37478 Butte Magalia 731 Comment
  UCD66782  Glyceria declinata John Thomas Howell 1957-7-22 32817 Marin 2 miles south of Olema. Comment
  CAS-BOT-BC282707  Glyceria elata John Thomas Howell 1955-7-19 30827 Plumas Mohawk, Sierra Nevada 1371 Comment
  RSA40166  Gnaphalium luteoalbum J. T. Howell 1943-6-29 18243 San Francisco Concert Valley, Golden Gate Park Comment
  CAS-BOT-BC302508  Gnaphalium palustre John Thomas Howell 1958-7-31 34148 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC302574  Gnaphalium palustre John Thomas Howell 1967-11-5 44152 A Kern Bed of the Kern River 3 miles above Kernville 845 Comment
  CAS-BOT-BC303192  Gnaphalium palustre John Thomas Howell 1946-7-17 22483 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC304851  Grindelia hirsutula J. T. Howell 1933-11-19 11724 Solano Suisun Comment
  CAS-BOT-BC304911  Grindelia hirsutula John Thomas Howell 1934-6-17 12239 Tehama 6 miles s. of Red Bluff Comment
  CAS-BOT-BC305016  Grindelia hirsutula J. T. Howell 1929-12-5 4550 Stanislaus 1 1/2 miles se. of Modesto Comment
  CAS-BOT-BC305029  Grindelia hirsutula John Thomas Howell 1929-7-21 4343 Merced Merced River bottom at Hopeton Bridge Comment
  CAS-BOT-BC305070  Grindelia hirsutula John Thomas Howell 1956-8-12 31749 San Francisco San Francisco. Alemany Blvd. near Bayshore Freeway Comment
  CAS-BOT-BC314455  Grindelia hirsutula John Thomas Howell 1933-7-23 11457 Marin Sausalito Hills Comment
  GH417598  Grindelia hirsutula J. T. Howell 1933-7-23 11454 Unknown Sausilito Hills Comment
  UC1176887  Grindelia hirsutula John Thomas Howell 1939-7-2 14834 Marin Pirates Cove Comment
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Jun 12 2012
  UC897042  Grindelia hirsutula J. T. Howell 1931-9-27 Mendocino Point Arena Comment
  CAS-BOT-BC304950  Grindelia hirsutula J. T. Howell 1933-7-1 11414 Ventura 2 mi. east of Ojai Comment
  CAS-BOT-BC305230  Grindelia hirsutula John Thomas Howell 1930-9-28 5486 Contra Costa Tunnel Road near Oak Spring Comment
  CAS-BOT-BC305245  Grindelia hirsutula John Thomas Howell 1954-9-5 30027 Contra Costa Marsh Creek Road 8 miles from Byron Comment
  CAS-BOT-BC304692  Grindelia squarrosa John Thomas Howell 1964-8-10 40949 Mono Slinkard Creek, about 1 mile west of Highway 395 1676 Comment
  POM183383  Grindelia stricta var. angustifolia J. T. Howell 1930-10-5 5524 Marin N end of San Pablo Bay, 2 miles W of Marin-Sonoma County line. Comment
  RSA868  Gutierrezia californica J. T. Howell 1927-11-6 802 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  UCR244687  Hackelia nervosa J. T. Howell, T. C. Fuller, G. D. Barbe 1981-6-22 54113 Plumas Sierra Nevada Mtns., 10.6 miles NE of LaPorte on road [LaPorte Rd.] to Quincy 1890 Comment
  CAS-BOT-BC231179  Hackelia sharsmithii John Thomas Howell 1949-8-10 26211 Tulare Upper Soldier Lake 3413 Comment
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Jan 17 2020
  UCD85231  Hainardia cylindrica John Thomas Howell 1930-6-8 5219 Sonoma 8 miles W of Petaluma on Bodega Road. Comment
  CAS-BOT-BC302203  Harmonia hallii John Thomas Howell 1943-5-11 18050 Lake 2.9 miles north of Middletown Comment
  CAS-BOT-BC307267  Hazardia squarrosa var. grindelioides John Thomas Howell 1927-10-22 3160 Orange N. side of Santa Ana Canyon 304 Comment
  CAS-BOT-BC302421  Hazardia whitneyi John Thomas Howell 1962-9-23 38811 Kern Near Tiger Flat, Greenhorn Mountains 1981 Comment
  CAS-BOT-BC309452  Helenium puberulum John Thomas Howell 1945-8-19 21436 Marin Head of Drakes Bay Comment
  CAS-BOT-BC309467  Helenium puberulum John Thomas Howell 1963-8-5 39927 Monterey Along Watsonville-San Juan Road, about 2 miles south of Aromas Comment
  HSC1954  Helenium puberulum J. T. Howell 1938-7-17 13984 Solano Suisun Mashes at Suisan Comment
  CAS-BOT-BC314766  Helianthella californica var. nevadensis John Thomas Howell 1934-7-11 12561 Lassen Near Black's Lake Comment
  RSA874  Helianthus gracilentus J. T. Howell 1927-7-3 256 Orange Claymine Canyon near Sierra Peak. 305 Comment
  CAS-BOT-BC310029  Hemizonella minima John Thomas Howell 1963-7-12 39888 El Dorado 3 miles sw of Twin Bridges on road to Kyburz 1676 Comment
  CAS-BOT-BC312141  Hemizonella minima John Thomas Howell 1951-7-19 27963 Tulare Monarch Lakes Trail, Mineral King and Vicinity 2590 Comment
  CAS-BOT-BC309608  Hemizonia congesta subsp. lutescens John Thomas Howell 1946-7-4 22171 Marin Hicks Valley Comment
  CAS-BOT-BC309836  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1932-9-17 10763 Napa 3 miles west of Napa Comment
  POM194218  Hemizonia lutescens J. T. Howell 1929-10-26 4541 Napa 9 miles N of Vallejo. Comment
  RSA118031  Hemizonia pentactis J. T. Howell 1955-7-8 30583 Monterey Jolon, Santa Lucia Mountains Comment
  CAS-BOT-BC388517  Herniaria hirsuta var. cinerea John Thomas Howell 1965-4-25 41066 Madera 5 miles northeast of Madera Comment
  SBBG47336  Hesperis matronalis J. T. Howell 1963-6-3 Plumas Quincy 1036 Comment
  UCD114968  Hesperis matronalis John Thomas Howell; Gordon H. True 1967-7-11 43380 Plumas Meadow at Quincy. 1036 Comment
  CAS-BOT-BC176050  Hesperolinon clevelandii John Thomas Howell 1933-6-4 11388 Napa Hills east of Napa Comment
  CAS-BOT-BC179184  Hesperolinon micranthum John Thomas Howell 1934-6-30 12258 Modoc Duncan Horse Camp. 1355 Comment
  RSA118052  Hesperolinon micranthum J. T. Howell 1955-7-7 30573 Monterey Dry slope near head of Mission Creek, Santa Lucia Mountains 762 Comment
  CAS-BOT-BC422529  Hesperomecon linearis John Thomas Howell 1955-5-20 30219 Monterey 3.5 miles east of summit of Jamesburg road, Santa Lucia Mts. Comment
  CAS-BOT-BC289138  Hesperostipa comata John Thomas Howell 1958-5-28 33553 Inyo Bishop Creek, Sierra Nevada 1950 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
  UCD72557  Heterocodon rariflorum John Thomas Howell 1940-5-12 15421 Marin Lagunitas Creek. Comment
  CAS-BOT-BC310262  Heterotheca grandiflora John Thomas Howell 1956-12-4 31977 Mariposa 1 mile from Mariposa on road to Briceburg Comment
  CAS-BOT-BC310919  Heterotheca villosa John Thomas Howell 1959-9-25 35011 Plumas Sierra Valley near Beckwourth 1493 Comment
  UC1347210  Heuchera merriamii John Thomas Howell 1937-7-24 13400 Siskiyou Caribou Basin; Salmon-Trinity Alps 1981 Comment
  CAS-BOT-BC424166  Heuchera micrantha var. erubescens John Thomas Howell; Gordon H. True 1969-6-23 45828 Plumas Middle Fork of Feather River at Nelson Point 1249 Comment
  RSA0062928  Heuchera rubescens var. alpicola John T. Howell 1942-8-5 17676 Tulare Between Big Arroyo and Chagoopa Plateau. Comment
  CAS-BOT-BC318797  Hieracium horridum John Thomas Howell 1969-8-27 45976 Tulare Near Mineral King on trail to White Chief district, Sierra Nevada 2743 Comment
  CAS-BOT-BC318668  Hieracium horridum John Thomas Howell 1946-7-22 22676 Fresno Mono Creek Canyon 3048 Comment
  CAS-BOT-BC316019  Hieracium nudicaule John Thomas Howell 1937-7-21 13178 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC312983  Hieracium triste John Thomas Howell 1944-8-14 20492 Tuolumne Tuolumne Canyon above Glen Aulin Comment
  UC897858  Hieracium triste John Thomas Howell 1939-8-8 15152 Siskiyou Black Mts, Marble Mts Comment
  CAS-BOT-BC55300  Hirschfeldia incana John Thomas Howell; Gordon H. True 1972-6-29 48929 Contra Costa Byron Hot Springs Road southeast of Byron. Comment
  CAS-BOT-BC325829  Holocarpha heermannii John Thomas Howell 1930-9-28 5487 Contra Costa 1 mile from Walnut Creek on Walnut Avenue to Concord Comment
  JEPS62611  Holocarpha virgata subsp. virgata John Thomas Howell 1969-10-20 46472 Merced Canal Creek on Snelling Road Canal Creek 91 Comment
  RSA54095  Holodiscus discolor J. T. Howell 1945-9-26 21508 Tuolumne Lambert Dome, Tuolumne Meadows Comment
  CAS-BOT-BC152613  Holodiscus discolor var. discolor John Thomas Howell 1943-8-4 19033 Glenn Summit ridge n. of Black Butte Comment
  CAS-BOT-BC147756  Holodiscus microphyllus var. microphyllus John Thomas Howell; Gordon H. True 1970-6-24 46691 Tulare Summit of North Manter Pass, Big Meadow to Manter Meadow, Kern Plateau 2499 Comment
  CAS-BOT-BC150202  Holodiscus microphyllus var. microphyllus John Thomas Howell 1950-7-12 26712 Inyo Sage Flat to Olancha Pass 2743 Comment
  CAS-BOT-BC284649  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1960-7-18 35511 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC284995  Hordeum depressum John Thomas Howell 1944-5-28 s.n. Marin Almonte Comment
  CAS-BOT-BC285050  Hordeum depressum John Thomas Howell 1948-4-26 24278 Tulare Near Earlimart Comment
  CAS-BOT-BC284704  Hordeum jubatum John Thomas Howell 1960-8-20 36246 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  UCR168520  Hordeum marinum J. T. Howell 1948-4-26 24287 Merced Central Valley, Near Los Banos 37 Comment
  CAS-BOT-BC285069  Hordeum marinum subsp. gussoneanum John Thomas Howell 1965-4-26 41141 Madera Coarsegold 670 Comment
  CAS-BOT-BC285125  Hordeum marinum subsp. gussoneanum John Thomas Howell 1957-5-26 32474 San Francisco San Francisco. North base of Lone Mt. Comment
  CAS-BOT-BC285199  Hordeum marinum subsp. gussoneanum John Thomas Howell 1966-3-29 41433 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC289586  Hordeum marinum subsp. gussoneanum John Thomas Howell 1963-5-6 39193 Monterey Near Jolon, Santa Lucia Mts. Comment
  UCD86232  Hordeum murinum subsp. glaucum John Thomas Howell 1955-6-12 30330 Trinity Weaverville. Comment
  CAS-BOT-BC284871  Hordeum murinum subsp. glaucum John Thomas Howell 1953-5-23 28999 A Tuolumne Sonora 548 Comment
  CAS-BOT-BC289443  Hordeum murinum subsp. leporinum John Thomas Howell 1957-5-26 32417 San Francisco North base of Lone Mt., San Francisco Comment
  POM179705  Horkelia californica J. T. Howell 1930-6-22 5323 Marin Valley above Rodeo Lagoon Comment
  CAS-BOT-BC143895  Horkelia cuneata var. sericea John Thomas Howell 1947-7-14 23333 Monterey 8 miles n. of Salinas Comment
  CAS-BOT-BC157381  Horkelia fusca John Thomas Howell; Gordon H. True 1970-7-28 46953 Tulare West side of Big Meadow just south of Pipe Spring, Kern Plateau 2377 Comment
  UC574869  Horkelia fusca subsp. parviflora John Thomas Howell 1937-7-21 13168 Siskiyou near Big Flat (South Fork of Salmon River) 1524 Comment
  RSA85620  Horkelia marinensis J. T. Howell 1930-9-14 5476 Mendocino 4.5 miles north of Ft. Bragg. Comment
  JEPS44521  Horkelia rydbergii John Thomas Howell 1927-7-10 2724 San Bernardino e side Big Bear Lake (near Pine Knot Lodge, San Bernardino Mts.); San Bernardino Mts., e side of Big Bear Lake 2042 Comment
  CAS-BOT-BC537960  Horkelia tridentata var. flavescens John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-20 53544 Trinity In Canadian Zone, Scott Mt. summit on road from Carrville to Callahan. 1645 Comment
  CAS-BOT-BC146327  Horkelia tularensis John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53871 Tulare Bald Mountain, Kern Plateau 2834 Comment
  CAS-BOT-BC142667  Howellanthus dalesianus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-20 53545 Trinity Scott Mt. summit on road from Carrville to Callahan 1645 Comment
  CAS-BOT-BC315978  Hulsea vestita subsp. vestita John Thomas Howell 1949-7-26 25789 Tulare Golden Trout Creek 2941 Comment
  CAS-BOT-BC312741  Hymenoxys hoopesii John Thomas Howell 1977-8-3 52576 Alpine Ebbetts Pass Road, 4.5 miles east of Lake Alpine Comment
  CAS-BOT-BC312779  Hymenoxys hoopesii John Thomas Howell 1942-7-26 17198 Tulare Mineral King Comment
  CAS-BOT-BC312825  Hymenoxys hoopesii John Thomas Howell; Gordon H. True 1966-7-11 41642 Tulare Poison Meadow, Kern Plateau 2286 Comment
  SD130459  Hypericum formosum var. scouleri John Thomas Howell, Gordon H. True and Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville. 1326 Comment
  RSA223636  Hypericum perforatum J. T. Howell 1956-6-3 31460 San Francisco Embarcadero and Front Street Comment
  CAS-BOT-BC88614  Iberis umbellata John Thomas Howell 1957-8-6 32883 San Francisco Golden Gate Park. Strybing Arboretum. Comment
  UC421621  Isocoma acradenia var. eremophila John Thomas Howell 1927-11-25 3208 San Diego Borrego Valley in w Colorado Desert Colorado Desert, Borrego Valley Comment
  CAS-BOT-BC57712  Isoetes bolanderi John Thomas Howell 1944-8-16 20621 Tuolumne Mono Pass Comment
  CAS-BOT-BC57738  Isoetes howellii John Thomas Howell 1937-6-6 13015 Sonoma Sebastopol Comment
  CAS-BOT-BC69854  Isoetes occidentalis John Thomas Howell 1945-9-25 21502 Tuolumne Outlet of Young Lake. Comment
  RSA224251  Isolepis cernua J. T. Howell 1956-6-5 31486 San Francisco San Francisco. North slope of Bayview Hills. Comment
  CAS-BOT-BC137456  Ivesia campestris John Thomas Howell 1949-7-25 25735 Tulare Siberian Pass Creek 3352 Comment
  CAS-BOT-BC142803  Ivesia lycopodioides subsp. megalopetala John Thomas Howell 1941-7-22 16399 Inyo Mono Pass Trail 3352 Comment
  CAS-BOT-BC139818  Ivesia lycopodioides var. scandularis John Thomas Howell 1948-7-28 25117 Tulare Center Basin 3657 Comment
  RSA26092  Ivesia pygmaea J. T. Howell 1942-8-3 17657 Tulare Hamilton Lakes. 3049 Comment
  CAS-BOT-BC142360  Ivesia sericoleuca John Thomas Howell 1962-6-18 37826 Sierra Sierra Valley, 2.5 mi. n. of Sattley - Sierra Nevada 1524 Comment
  CAS-BOT-BC143368  Ivesia sericoleuca John Thomas Howell 1963-7-11 39827 Nevada 3 miles northeast of Truckee 1767 Comment
  CAS-BOT-BC48197  Jamesia americana var. rosea John Thomas Howell 1949-7-31 25959 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC340277  Jensia rammii John Thomas Howell 1954-5-17 29675 El Dorado 3 miles south of Garden Valley Comment
  CAS-BOT-BC101885  Juglans californica John Thomas Howell 1963-8-6 40052 Monterey Arroyo Seco at bridge below U.S. Forest Service Campground, Santa Lucia Mountains Comment
  CAS-BOT-BC109982  Juncus John Thomas Howell; Gordon H. True 1969-9-30 46403 Tulare Sierra Nevada. Kern Plateau. Pipe Sping on Cherry Hill Road, west side of Big Meadow. 2407 Comment
  UC750728  Juncus bryoides John Thomas Howell 1946-7-23 22682 Fresno Fourth Recess 3048 Comment
  UCD141411  Juncus bufonius var. bufonius John Thomas Howell; Gordon H. True 1967-5-31 42528 Tulare ca. 4.5 miles east-northeast of Pixley. Pools in NE corner of area. 83 Comment
  RSA51480  Juncus hemiendytus var. abjectus J. T. Howell 1949-7-23 s.n. Tulare Rock Creek 3201 Comment
  CAS-BOT-BC110791  Juncus mertensianus John Thomas Howell 1948-7-22 24897 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 3048 Comment
  UC710572  Juncus parryi John Thomas Howell 1943-7-16 18419 Nevada near Norden (Boreal Ridge, w side of Donner Pass); Boreal Ridge, Donner Pass 2133 Comment
  RSA102  Juncus xiphioides J. T. Howell 1927-7-9 309 San Bernardino Box S Spring, Mojave Desert. 1082 Comment
  CAS-BOT-BC81197  Juniperus occidentalis John Thomas Howell 1934-6-16 12208 A Modoc Parker Creek, Warner Mts. 1584 Comment
  CAS-BOT-BC81210  Juniperus occidentalis John Thomas Howell 1934-6-16 12208 B Modoc Parker Creek, Warner Mts. 1584 Comment
  CAS-BOT-BC234568  Justicia californica John Thomas Howell 1928-1-30 3306 Riverside 2 miles e. of Shaver's Well, Colorado Desert Comment
  CAS-BOT-BC56337  Kalmia microphylla subsp. microphylla John Thomas Howell 1943-7-24 18778 Nevada Frog Lake Comment
  RSA1321  Keckiella cordifolia J. T. Howell 1928-7-8 1055 Riverside Santa Ana Mountains above Glen Ivy 1067 Comment
  CAS-BOT-BC236877  Keckiella corymbosa John Thomas Howell 1954-11-3 30139 Monterey Arroyo Seco River Canyon, Santa Lucia Mountains 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
  NY790349  Keckiella lemmonii J. T. Howell 1976-7-16 51915 Plumas Just east of Bucks Summit on road to Meadow Valley 1645.9 Comment
  CAS-BOT-BC238308  Keckiella ternata var. ternata John Thomas Howell 1927-8-7 2983 San Diego In canyon nw. of Pine Valley 1219 Comment
  JEPS29545  Kelloggia galioides John Thomas Howell 1960-7-17 35489 Plumas Drakesbad; Lassen Volcanic National Park 1676 Comment
  CAS-BOT-BC180808  Kochia scoparia John Thomas Howell 1956-8-19 31774 San Francisco Waterfront St. near Mission Rock Terminal, San Francisco Comment
  CAS-BOT-BC175931  Koeleria macrantha John Thomas Howell 1941-5-25 16212 Marin Rifle Camp, Mt. Tamalpais Comment
  POM203916  Koeleria macrantha J. T. Howell 1933-5-23 11326 San Francisco west of Sutro Forest Comment
  CAS-BOT-BC271275  Koeleria pyramidata John Thomas Howell 1942-8-1 17515 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  CAS-BOT-BC340434  Lactuca saligna John Thomas Howell 1957-6-17 32674 San Francisco San Francisco. Lone Mt. Comment
  CAS-BOT-BC340451  Lactuca saligna John Thomas Howell 1943-9-25 19324 Marin In southern part of Mill Valley 7 Comment
  CAS-BOT-BC340679  Lactuca serriola John Thomas Howell; Gordon H. True 1967-7-6 43203 Tulare On Road 160, about 4.5 miles east-northeast of Pixley. Near E boundary of area 83 Comment
  CAS-BOT-BC340702  Lactuca virosa John Thomas Howell 1954-9-8 30108 San Mateo Skyline Blvd. at San Andreas Lake, 2 miles west of San Bruno Comment
  CAS-BOT-BC341377  Lagophylla glandulosa John Thomas Howell 1934-6-17 12236 Tehama Near Cottonwood Comment
  CAS-BOT-BC341707  Lagophylla ramosissima John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53963 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  UCR84530  Langloisia matthewsii J. T. Howell 1958-5-25 33348 Inyo Sierra Nevada Mtns., Carroll Creek. 1677 Comment
  UC909142  Langloisia setosissima subsp. setosissima John Thomas Howell 1928-3-24 3495 San Diego near Palm Wash; w. Colorado Desert Comment
  CAS-BOT-BC337871  Lapsana communis John Thomas Howell 1941-6-29 16325 Marin Mill Valley Comment
  CAS-BOT-BC412754  Lastarriaea coriacea John Thomas Howell 1954-3-18 29133 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC324450  Lasthenia californica subsp. macrantha John Thomas Howell 1929-5-26 4238 Mendocino Fort Bragg 15 Comment
  CAS-BOT-BC352823  Lasthenia glabrata subsp. glabrata John Thomas Howell 1931-3-29 6015 San Benito 1.5 miles SE of San Benito. Comment
  POM203204  Lasthenia glabrata subsp. glabrata J. T. Howell 1931-3-29 6015 San Benito Near San Benito Comment
  POM361578  Lasthenia microglossa J. T. Howell 1931-3-22 5958 Monterey Stone Canyon Comment
  CAS-BOT-BC213367  Lathyrus jepsonii subsp. californicus John Thomas Howell; Alice Eastwood 1937-6-20 4574 Mendocino Near Yorkville. Comment
  CAS-BOT-BC205034  Lathyrus jepsonii var. jepsonii John Thomas Howell 1938-8-28 14592 Solano Suisun Marshes Comment
  CAS-BOT-BC205080  Lathyrus sulphureus John Thomas Howell 1981-10-14 54650 Sutter Dean Ranch, Sutter Buttes Comment
  RSA1496  Lathyrus vestitus var. alefeldii J. T. Howell 1929-2-14 1233 Riverside Santiago Trail, above Glen Ivy Comment
  CDA4999  Lavatera cretica J. T. Howell 1976-6-2 51805 Marin Corte Madera. 0 Comment
  RSA8533  Layia chrysanthemoides J. T. Howell 1933-5-26 11343 San Mateo Crystal Springs Lake. Comment
  CAS-BOT-BC321462  Layia glandulosa John Thomas Howell 1962-5-21 37247 Kern West of Walker Pass summit 1584 Comment
  CAS-BOT-BC321594  Layia glandulosa John Thomas Howell 1977-3-12 52359 San Bernardino Mojave Desert. E of Lucerne Valley 914 Comment
  CAS-BOT-BC327372  Layia heterotricha John Thomas Howell 1931-3-22 5969 Monterey Stone Canyon 13 miles E of Salinas Valley Comment
  CAS-BOT-BC328231  Layia heterotricha John Thomas Howell 1931-3-18 5842 Fresno Oil Canyon Comment
  CAS-BOT-BC381166  Layia platyglossa John Thomas Howell 1963-5-6 39091 Monterey 4 miles south of King City on road to Jolon 121 Comment
  CAS-BOT-BC379637  Layia platyglossa John Thomas Howell 1925-4-18 976 San Francisco Between Land's End and Cliff House, Pt. Lobos, San Francisco Comment
  SBBG115764  Leersia oryzoides J. T. Howell 1973-11-1 50303 Kern Kern River, Hart Memorial Park near Bakersfield 146 Comment
  GH400230  Lepechinia calycina J. T. Howell 1955-7-8 30640 Unknown Arroyo Seco road near Escondido Camp, Santa Lucia Mts. 792 Comment
  CAS-BOT-BC221604  Lepechinia cardiophylla John Thomas Howell 1927-6-26 2606 Orange Claymine Canyon, n. Santa Ana Mts. 609 Comment
  CAS-BOT-BC88938  Lepidium dictyotum John Thomas Howell 1931-3-17 5786 Kings 14 miles north of Stratford on road to Fresno. Comment
  POM225543  Lepidium dictyotum J. T. Howell 1931-3-23 5979 Monterey Poncho Rico Canyon Comment
  CAS-BOT-BC89180  Lepidium draba John Thomas Howell 1956-4-29 31303 San Francisco San Francisco. Front and Vallejo streets. Comment
  CAS-BOT-BC89379  Lepidium fremontii John Thomas Howell 1958-5-28 33565 Inyo Sierra Nevada. Bishop Creek. 1828 Comment
  JEPS53618  Lepidium fremontii John Thomas Howell 1928-1-30 3305 Riverside 2 mi e Shaver's Well; Colorado Desert Comment
  CAS-BOT-BC12568  Lepidium nitidum John Thomas Howell 1963-5-5 38981 Monterey Mustang Grade, west of Priest Valley. 670 Comment
  CAS-BOT-BC12760  Lepidium oxycarpum John Thomas Howell 1933-4-1 10924 Sonoma Petaluma. Comment
  CAS-BOT-BC12796  Lepidium perfoliatum John Thomas Howell 1958-5-29 33623 Inyo Sierra Nevada. Bishop. 1264 Comment
  CAS-BOT-BC329361  Lepidospartum squamatum John Thomas Howell 1971-6-25 48111 San Joaquin Flood plain of Hospital Creek at Interstate Hwy 580, 4 miles SW of Vernalis Comment
  SEINET10960781  Leptochloa fusca subsp. fascicularis John Thomas Howell 1962-9-21 Howell 38682 Kern Kern River Canyon, el. ca. 427 Comment
  UC702953  Leptodactylon pungens John Thomas Howell 1941-7-31 16626 Madera San Joaquin Mt. Comment
  CAS-BOT-BC226546  Leptosiphon acicularis John Thomas Howell 1933-4-2 10932 Sonoma Sonoma Creek Canyon Comment
  UCSB5175  Leptosiphon ciliatus Howell, John 1945-6-21 Lake Bartlett Mountain; Sawmill Flat to Ruppert Ridge Comment
  RSA43311  Leptosiphon liniflorus J. T. Howell 1948-6-15 24373 San Luis Obispo San Juan River Valley. 366 Comment
  CAS-BOT-BC225634  Leptosiphon oblanceolatus John Thomas Howell 1949-7-18 25466 Inyo Cottonwood Lakes 3383 Comment
  CAS-BOT-BC324080  Lessingia germanorum John Thomas Howell 1931-9-29 8126 San Francisco Presidio, San Francisco Comment
  GH414054  Lessingia germanorum J. T. Howell 1926-11-7 2233 Unknown San Francisco, near Lake Merced Comment
  RSA0010326  Lessingia germanorum var. tenuipes John T. Howell 1927-8-17 3005 San Luis Obispo 4 miles south of Templeton. Comment
  CAS-BOT-BC339246  Lessingia glandulifera var. glandulifera John Thomas Howell 1960-3-25 s.n. Kern North side above summit, Walker Pass 1676 Comment
  CAS-BOT-BC339311  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-8-17 3011 Monterey 13 miles sw. of Jolon on the Nacimiento River, Santa Lucia Mts. Comment
  CAS-BOT-BC324162  Lessingia hololeuca John Thomas Howell 1946-9-8 22992 Marin Near Ignacio Comment
  POM197811  Lessingia hololeuca John T. Howell 1926-10-20 2222 Marin Ridge between Alto and Chapman Comment
  SBBG28037  Lessingia hololeuca J. T. Howell 1945-9-2 Marin San Rafael Hills Comment
  CAS-BOT-BC324145  Lessingia hololeuca John Thomas Howell 1927-5-10 2383 Marin Baltimore Park 213 Comment
  RSA91164  Lessingia hololeuca John T. Howell 1945-9-2 s.n. Marin San Rafael Hills Comment
  UC473466  Lessingia lemmonii var. peirsonii John Thomas Howell 1930-5-13 4984 Kern 5 mi n Ricardo Comment
  CAS-BOT-BC339645  Lessingia leptoclada John Thomas Howell 1962-9-26 38933 Kern 5.5 miles west of Summit on road to Glennville, Greenhorn Mountains 1463 Comment
  CAS-BOT-BC339613  Lessingia leptoclada John Thomas Howell 1930-10-12 5578 El Dorado Hill directly north of Coloma on road to Georgetown Comment
  RSA201460  Lessingia nemaclada John T. Howell 1960-7-24 35997 Tehama 8 miles west of Mineral. 1220 Comment
  CAS-BOT-BC342012  Lessingia ramulosa John Thomas Howell 1930-8-24 5450 Lake 4 miles from Middletown on Adams Springs Road Comment
  CAS-BOT-BC341998  Lessingia ramulosa John Thomas Howell No date on label 2250 Sonoma SE. of Santa Rosa Comment
  OBI4876  Lessingia virgata John Thomas Howell 1959-9-19 34612 Butte 5 mi W of Oroville 46 Comment
  CAS-BOT-BC342064  Lessingia virgata John Thomas Howell 1951-8-19 28151 Butte Hills west of Oroville Comment
  CAS-BOT-BC342082  Leucanthemum vulgare John Thomas Howell 1976-7-16 51885 Plumas Spanish Creek near mouth of Slate Creek 1066 Comment
  UC852030  Lewisia cotyledon var. cotyledon John Thomas Howell 1939-8-3 14954 Siskiyou Spirit Lake Marble Mts., Spirit Lake Comment
  CAS-BOT-BC444177  Lewisia nevadensis John Thomas Howell 1960-7-22 35921 Plumas Lassen Volcanic National Park. Devil's Kitchen to Drakesbad 1828 Comment
  CAS-BOT-BC444231  Lewisia pygmaea John Thomas Howell 1944-8-8 s.n. Mariposa Southeast of Elizabeth Lake in high gap Comment
  CAS-BOT-BC272259  Leymus X multiflorus John Thomas Howell 1963-6-21 39477 Monterey Between San Lucas and San Lorenzo Creek summit on road to Priest Valley Comment
  CAS-BOT-BC272260  Leymus X multiflorus John Thomas Howell; Peter H. Raven 1962-10-27 18115 Monterey 12.3 mi. NW of Parkfield Comment
  CAS-BOT-BC283521  Leymus X vancouverensis John Thomas Howell 1946-7-4 22177 Marin Dillons Beach Comment
  CAS-BOT-BC273582  Leymus californicus John Thomas Howell 1944-9-10 20736 Marin Shell Beach north of Inverness Comment
  CAS-BOT-BC283771  Leymus cinereus John Thomas Howell 1974-7-10 50554 Lassen Elysian Valley 1325 Comment
  UC1177105  Leymus pacificus John Thomas Howell 1948-6-6 24335 Marin Stinson Beach Comment
  CAS-BOT-BC272232  Leymus pacificus John Thomas Howell 1950-7-4 s.n. San Francisco Above Marine Hospital, Presidio, San Francisco Comment
  CAS-BOT-BC272135  Leymus triticoides John Thomas Howell; Gordon H. True 1967-7-3 42859 Tulare Rockhouse Meadow, Kern Plateau, Sierra Nevada 1706 Comment
  CAS-BOT-BC274485  Leymus triticoides John Thomas Howell 1944-9-24 20741 Marin Stinson Beach Comment
  CAS-BOT-BC274496  Leymus triticoides John Thomas Howell 1973-7-25 50002 Merced Just north of Ingomar on Cottonwood Road to Gustine 30 Comment
  CAS-BOT-BC451570  Lilaea John Thomas Howell 1954-5-17 29694 El Dorado 1.5 miles south of Garden Valley Comment
  CAS-BOT-BC451699  Lilaea scilloides John Thomas Howell 1951-5-28 s.n. Sonoma Laguna east of Sebastopol Comment
  CAS-BOT-BC509389  Lilium kelleyanum John Thomas Howell 1937-7-20 13148 Trinity Van Ness Creek Comment
  CAS-BOT-BC130738  Lilium pardalinum John Thomas Howell 1966-7-20 41994 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon Comment
  UC1042321  Limnanthes bakeri John Thomas Howell 1954-4-24 29148 Mendocino 1.5 mi n Willits (near type locality) Comment
  UC703024  Linanthus ciliatus John Thomas Howell 1942-7-26 17217 Tulare Mineral King Comment
  UC980837  Linanthus harknessii John Thomas Howell 1944-7-17 19827 Glenn Plaskett Meadows Comment
  UC421658  Linanthus parviflorus John Thomas Howell 1928-6-10 3873 Los Angeles Monrovia Canyon San Gabriel Mts. Comment
  CAS-BOT-BC435488  Lithophragma glabrum John Thomas Howell 1941-7-30 16518 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC437156  Lithophragma heterophyllum John Thomas Howell; Gordon H. True 1971-7-15 48562 A Tulare Northeast of Taylor Meadow between Church Dome and Black Mt. 2316 Comment
  CAS-BOT-BC441129  Lithophragma parviflorum John Thomas Howell 1944-7-13 19749 Glenn Summit ridge north of Black Butte Comment
  CAS-BOT-BC342221  Logfia filaginoides John Thomas Howell 1964-4-27 40505 Mariposa El Portal 640 Comment
  CAS-BOT-BC342194  Logfia filaginoides John Thomas Howell 1928-5-4 3776 Los Angeles Between dam and Deer Park in Monrovia Canon [Canyon], San Gabriel Mts. Comment
  CAS-BOT-BC342371  Logfia gallica John Thomas Howell 1972-6-25 48886 Solano Near intersection of Columbus Parkway and Benecia Road, about 2 miles west of Benecia Comment
  CAS-BOT-BC342403  Logfia gallica John Thomas Howell 1929-6-2 4284 Marin Hills at Fort Baker Comment
  CAS-BOT-BC283474  Lolium multiflorum John Thomas Howell 1963-8-6 39984 Monterey On the edge of cultivated fields along Central Ave between King City and Greenfield Comment
  CAS-BOT-BC271040  Lolium perenne John Thomas Howell; Gordon H. True 1966-7-11 41692 Tulare Poison Meadow, Kern Plateau, Sierra Nevada 2286 Comment
  CAS-BOT-BC211167  Lomatium insulare John Thomas Howell 1932-3-12 8207 Ventura San Nicolas Island Comment
  UC703194  Lomatium nevadense var. parishii John Thomas Howell 1941-7-30 16496 Madera near Garnet lake 2956 Comment
  CAS-BOT-BC241399  Lonicera John Thomas Howell 1955-6-15 30484 Butte 6 miles from Paradise on road to Pentz 426 Comment
  CAS-BOT-BC234833  Lonicera subspicata John Thomas Howell 1931-4-12 6278 Santa Barbara Cochie [Coche] Canyon, Santa Cruz I. Comment
  CAS-BOT-BC234834  Lonicera subspicata John Thomas Howell 1931-4-12 6278 Santa Barbara Cochie [Coche] Canyon, Santa Cruz Island Comment
  CAS-BOT-BC234880  Lonicera subspicata var. denudata John Thomas Howell 1963-6-22 39542 Monterey Between Mustang Summit and Priest Valley 670 Comment
  CAS-BOT-BC201482  Lupinus albifrons var. albifrons John Thomas Howell 1965-6-15 41334 Monterey Near the Monterey Airport on Salinas road about 4 miles east of Monterey Comment
  CAS-BOT-BC196046  Lupinus albifrons var. collinus John Thomas Howell 1940-5-26 15544 Marin Little Carson Comment
  CAS-BOT-BC196272  Lupinus albifrons var. eminens John Thomas Howell 1930-3-23 4570 Lake Four miles from Middletown on road to Adams Springs Comment
  CAS-BOT-BC196285  Lupinus albifrons var. eminens John Thomas Howell 1931-3-29 6008 San Benito 4 miles from San Benito on road to the Pinnacles Comment
  CAS-BOT-BC182187  Lupinus argenteus John Thomas Howell 1934-7-2 12368 Modoc W side of Clear Lake. Comment
  CAS-BOT-BC208747  Lupinus argenteus var. heteranthus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49232 Lassen On Hwy. 395 NW of Doyle on road to Milford - Sierra Nevada 1280 Comment
  RSA407  Lupinus bicolor subsp. microphyllus J. T. Howell 1925-2-25 852 Orange Near Bee Canyon, Rancho Santa Ana. 152 Comment
  JEPS33673  Lupinus breweri John Thomas Howell 1925-5-29 1113 El Dorado slope above Emerald Bay (Lake Tahoe); , slope above Emerald Bay 1981 Comment
  CAS-BOT-BC196775  Lupinus breweri var. bryoides John Thomas Howell 1949-7-26 25763 Tulare Whitney Meadows 2987 Comment
  CAS-BOT-BC215448  Lupinus cervinus John Thomas Howell 1955-5-17 30164 Monterey N slope of Junipero Serra Peak, Santa Lucia Mountains 1524 Comment
  GH65490  Lupinus debilis J. T. Howell 1945-6-21 21193 Unknown Bartlett Mountain, Rupert Ridge to Bartlett Flat Comment
  CAS-BOT-BC205355  Lupinus elatus John Thomas Howell 1927-7-10 2743 San Bernardino North side of Big Bear Lake, San Bernardino Mts. 2042 Comment
  UC1177214  Lupinus formosus John Thomas Howell 1944-7-9 19688 Marin Inverness Ridge Comment
  UCR88066  Lupinus formosus var. robustus J. T. Howell 1954-5-10 29375 Madera Sierra Nevada Mtns, Four mi. south of North Fork. 671 Comment
  GH369078  Lupinus magnificus J. T. Howell 1928-6-14 3893 Unknown Surprise Canyon, Panamint Mts. Comment
  CAS-BOT-BC8367  Lupinus mariposanus John Thomas Howell 1938-5-23 13880 Mariposa 4 miles from Nipinnawasee on raod to Mariposa Comment
  SEINET12894119 Image available Lupinus polyphyllus J. T. Howell 1938-1 14406 Unknown Comment
  CAS-BOT-BC436638  Luzula cascadensis John Thomas Howell 1944-8-7 20076 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC436606  Luzula cascadensis John Thomas Howell; Gordon H. True 1966-7-11 41753 Tulare Sierra Nevada, Kern Plateau: Horse Meadow 2255 Comment
  UC843146  Luzula parviflora John Thomas Howell 1938-8-13 14574 Mariposa Snow Flat Comment
  UC1177448  Lythrum hyssopifolia John Thomas Howell 1945-7-29 21340 Marin Bolinas Comment
  CAS-BOT-BC342794  Madia elegans John Thomas Howell 1943-8-7 19163 Glenn Plaskett Meadows 1828 Comment
  POM304542  Madia elegans J. T. Howell 1942-7-24 s.n. Tulare Mineral King Comment
  SEINET11601357 Image available Madia exigua J. T. Howell, T. C. Fuller, G. D. Barbe 1981-6-24 54193 Plumas 2.5 miles northeast of Quincy Junction on road to Mt. Hough 1280 Comment
  CAS-BOT-BC334670  Madia glomerata John Thomas Howell 1942-7-27 17279 Tulare Between Mineral King and Timber Gap Comment
  CAS-BOT-BC343231  Madia gracilis John Thomas Howell 1978-7-29 53345 Nevada 5 miles north of Truckee on road to Sierraville 1767 Comment
  CAS-BOT-BC343287  Madia gracilis John Thomas Howell; Gordon H. True 1967-7-11 43285 Plumas 2 miles from Quincy Junction on road to Mt. Hough 1219 Comment
  CAS-BOT-BC343307  Madia gracilis John Thomas Howell 1957-5-17 32241 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC510670  Maianthemum racemosum subsp. amplexicaule John Thomas Howell 1948-7-29 25182 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC514151  Maianthemum stellatum John Thomas Howell; Gordon H. True 1971-6-16 47980 Kern Claraville 1920 Comment
  CAS-BOT-BC514180  Maianthemum stellatum John Thomas Howell 1937-7-25 13463 Siskiyou Caribou Basin, Salmon-Trinity Alps Comment
  CAS-BOT-BC204001  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-8-29 27434 b Inyo Along road, from Independence to Onion Valley 2590 Comment
  CAS-BOT-BC206334  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville. Comment
  CAS-BOT-BC204046  Malacothamnus fremontii John Thomas Howell 1971-6-25 48114 Stanislaus On Interstate Hwy. 5 at Black Gulch Creek, 2.5 miles west of Patterson Comment
  CAS-BOT-BC204107  Malacothamnus hallii John Thomas Howell; Thos. H. Kearney 1950-8-27 27423 Santa Clara Metcalf Road just east of Coyote 76 Comment
  CAS-BOT-BC204190  Malacothamnus marrubioides John Thomas Howell 1950-11-9 27485 Los Angeles 12 miles n. of Castac [Castaic] 609 Comment
  RSA43315  Malacothamnus niveus J. T. Howell 1948-6-15 s.n. San Luis Obispo Gillis Canyon, SE of Shandon 457 Comment
  CAS-BOT-BC213632  Malacothamnus palmeri var. lucianus John Thomas Howell 1955-7-8 30642 Monterey Arroyo Seco road 3 miles from Escondido Camp, Santa Lucia Mts. 792 Comment
  CAS-BOT-BC345414  Malacothrix clevelandii John Thomas Howell 1928-5-6 3778 Los Angeles East Fork of Santa Anita Canyon, on trail to Madrono Flat, San Gabriel Mts. Comment
  CAS-BOT-BC345462  Malacothrix coulteri John Thomas Howell 1931-3-20 5884 Kings 5 miles n. of Devil's Den Comment
  CAS-BOT-BC347836  Malacothrix saxatilis var. commutata John Thomas Howell 1933-8-18 11589 Monterey 6 miles west of Jamesburg, Santa Lucia Mts. Comment
  CAS-BOT-BC322582  Malacothrix saxatilis var. saxatilis John Thomas Howell 1930-5-19 5181 Santa Barbara 1 mile se of Gaviota Pass Comment
  CAS-BOT-BC140196  Malus John Thomas Howell 1959-9-21 34783 Plumas N. Fk. Feather River near Belden 701 Comment
  CAS-BOT-BC71151  Marsilea oligospora John Thomas Howell 1969-9-13 46142 Nevada 3 miles from Boca on road to Hobart Mills 1828 Comment
  RSA85836  Marsilea vestita J. T. Howell 1926-7-30 2159 Plumas Lake Almanor Comment
  CAS-BOT-BC497328  Marsilea vestita John Thomas Howell 1934-6-15 12194 Modoc Davis Reservoir, 2 mi E of Alturas Comment
  CAS-BOT-BC67776  Marsilea vestita John Thomas Howell 1970-9-25 47460 Kern Sierra Nevada - Lake Isabella (east side of north arm), about 5 miles south of Kernville. 792 Comment
  CAS-BOT-BC348058  Matricaria discoidea John Thomas Howell 1971-3-23 47578 Merced About 3 miles easterly from Stevison 30 Comment
  JEPS38181  Matricaria occidentalis John Thomas Howell 1965-4-27 41241 Merced 5 mi e Los Banos 30 Comment
  CAS-BOT-BC422654  Meconella californica John Thomas Howell 1930-5-15 5137 Kern Hills near Glenville [Glennville], Greenhorn Range 975 Comment
  CAS-BOT-BC91584  Meconella oregana John Thomas Howell 1930-4-6 4662 Santa Clara 8 miles from summit of Mount Hamilton on road to San Antonio Valley. Comment
  CAS-BOT-BC271196  Melica John Thomas Howell 1964-6-30 40849 San Luis Obispo Cambria Comment
  CAS-BOT-BC271144  Melica aristata John Thomas Howell 1958-7-26 33959 Fresno Blue Canyon Creek east of Tehipite Valley, Middle Fork of Kings River, Sierra Nevada 1417 Comment
  CAS-BOT-BC269431  Melica californica John Thomas Howell 1933-4-23 11102 San Benito The Pinnacles Comment
  CAS-BOT-BC271727  Melica californica John Thomas Howell; R. C. Barneby 1954-5-8 29207 Tulare Tule River Canyon, 2.5 miles abvoe Springville, Sierra Nevada 411 Comment
  CAS-BOT-BC282163  Melica geyeri John Thomas Howell 1940-5-19 15448 Napa Upper St Helena Creek Comment
  CAS-BOT-BC280943  Melica imperfecta John Thomas Howell; Gordon H. True 1968-5-13 44313 Tulare Cherry Hill Rd, Brush Creek Canyon, Kern Plateau 1584 Comment
  CAS-BOT-BC281403  Melica imperfecta John Thomas Howell; et al. 1978-4-5 52795 Calaveras Near Stanislaus RIver bridge, Camp Nine Road NE of Vallecito 335 Comment
  CAS-BOT-BC281063  Melica stricta John Thomas Howell 1958-5-26 33413 Inyo Onion Valley Rd 2133 Comment
  CAS-BOT-BC281064  Melica stricta John Thomas Howell 1958-5-26 33417 Inyo Onion Valley Rd 2133 Comment
  CAS-BOT-BC281146  Melica stricta John Thomas Howell 1950-7-16 26976 Tulare Gorge N of Bakeoven Meadows, S Fork of Kern River 2499 Comment
  CAS-BOT-BC281194  Melica stricta John Thomas Howell 1944-8-12 20399 Tuolumne Gaylor Lakes 3291 Comment
  CAS-BOT-BC281012  Melica stricta John Thomas Howell 1943-8-8 19179 Unknown Anthony Peak, Tehama - Mendocino County Comment
  CAS-BOT-BC262527  Melica torreyana John Thomas Howell 1940-5-12 15430 Marin Between Little Carson and Carson Ridge Comment
  RSA32512  Mentzelia dispersa J. T. Howell 1945-6-19 21015 Lake Sawmill Flat, Bartlett Mountain. 1220 Comment
  RSA441  Mentzelia micrantha J. T. Howell 1927-7-3 260 Orange Claymine Canyon near Sierra Peak. 305 Comment
  CAS-BOT-BC170876  Mentzelia veatchiana John Thomas Howell 1962-5-20 37109 Kern Kernville - Sierra Nevada 807 Comment
  CAS-BOT-BC170880  Mentzelia veatchiana John Thomas Howell 1930-5-13 5009 Kern Summit of Walker Pass 1584 Comment
  CAS-BOT-BC429164  Micranthes odontoloma John Thomas Howell 1949-8-7 26128 Tulare Rock Creek 3048 Comment
  CAS-BOT-BC429182  Micranthes oregana John Thomas Howell 1949-8-12 26249 Inyo Cottonwood Creek 3108 Comment
  CAS-BOT-BC322606  Micropus amphibolus John Thomas Howell 1943-5-22 18148 Marin Fairfax Hills Comment
  CAS-BOT-BC348845  Microseris douglasii subsp. douglasii John Thomas Howell; Gordon H. True 1971-5-26 47634 Placer Northern limits of Lincoln 48 Comment
  CAS-BOT-BC348925  Microseris douglasii subsp. douglasii John Thomas Howell 1946-5-12 21785 Marin Carson Ridge Comment
  CAS-BOT-BC348931  Microseris douglasii subsp. douglasii John Thomas Howell 1941-5-25 16221 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC322799  Microseris sylvatica John Thomas Howell 1928-4-5 3715 Kern 8 miles below Keene, Tehachapi Pass Road Comment
  POM203997  Microsteris gracilis subsp. humilis J. T. Howell 1933-4-23 11163 San Benito Near Hernandez. Comment
  UC103632  Mimulus aurantiacus var. aurantiacus Thos. Howell 1892-4-21 1454 Del Norte Smith River Comment
  UC710533  Mimulus moniliformis John Thomas Howell 1943-8-4 19008 Glenn Plaskett Meadows 1828 Comment
  JEPS58933  Mimulus rattanii John Thomas Howell 1946-7-7 22196 Marin s Barths Retreat; Mt. Tamalpais Comment
  CAS-BOT-BC388686  Minuartia douglasii John Thomas Howell 1924-5-25 350 Mariposa Near Fish Hatchery, Wawona 1219 Comment
  CAS-BOT-BC181594  Minuartia nuttallii var. gracilis John Thomas Howell 1942-7-29 17366 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC181087  Minuartia nuttallii var. gregaria John Thomas Howell 1937-7-29 13640 Trinity Scott Mt. between Trinity and Siskiyou cos. Comment
  CAS-BOT-BC434663  Mirabilis laevis var. crassifolia John Thomas Howell 1957-4-30 32119 Monterey San Lorenzo Creek 5 miles from King City Comment
  CAS-BOT-BC434795  Mirabilis laevis var. retrorsa John Thomas Howell 1962-7-7 38179 Kern Wofford 792 Comment
  RSA275  Mirabilis laevis var. villosa J. T. Howell 1927-6-11 95 San Bernardino Between Cajon Pass and Hesperia 1067 Comment
  CAS-BOT-BC433001  Mitella breweri John Thomas Howell 1940-7-30 15719 Tulare East Lake 2926 Comment
  CAS-BOT-BC221771  Monardella linoides subsp. sierrae John Thomas Howell 1947-8-16 24150 Inyo Big Pine Lakes Trail 2743 Comment
  CAS-BOT-BC221982  Monardella odoratissima subsp. glauca John Thomas Howell 1964-8-10 40948 Alpine Just east of Monitor Pass 2468 Comment
  CAS-BOT-BC222105  Monardella odoratissima subsp. pallida John Thomas Howell 1960-7-20 35789 Plumas Lassen Volcanic National Park. Between Boiling Springs Lake and Terminal Geyser 1859 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-BC220418  Monardella purpurea John Thomas Howell 1939-5-21 14689 Marin West side Tiburon Peninsula Comment
  CAS-BOT-BC220614  Monardella villosa John Thomas Howell 1930-7-13 5349 Napa Edge of the Crater Country Comment
  CAS-BOT-BC220549  Monardella villosa John Thomas Howell 1931-6-15 6701 Mendocino Near Talmadge [Talmage], Ukiah Valley Comment
  POM180780  Monardella villosa subsp. villosa J. T. Howell 1930-7-13 5349 Napa On the edge of the Crater Country Comment
  UC1995310  Monardella viridis John Thomas Howell 1933-8-27 11639 Napa Sage Canyon Napa Range Comment
  CAS-BOT-BC444626  Montia chamissoi John Thomas Howell 1934-6-14 s.n. Lassen Near Lost Lake, Warner Mts. 2438 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-BC445038  Montia linearis John Thomas Howell 1933-5-14 11226 Contra Costa St. Mary's College Comment
  CAS-BOT-BC260598  Muhlenbergia filiformis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49495 Lassen Elysian Valley, W of Janesville 1325 Comment
  CAS-BOT-BC264547  Muhlenbergia filiformis John Thomas Howell; Gordon H. True 1970-7-28 46974 Tulare W side of Big Meadow just S of Pipe Spring, Kern Plateau 2377 Comment
  CAS-BOT-BC264555  Muhlenbergia filiformis John Thomas Howell 1949-7-23 25665 Tulare Rock Creek 3200 Comment
  RSA26259  Muhlenbergia filiformis J. T. Howell 1940-8-5 16003 Tulare Between East Lake and Reflection Lake Comment
  SBBG115776  Muhlenbergia filiformis J. T. Howell 1958-8-13 34374 Madera near Isberg Lake 2987 Comment
  CAS-BOT-BC392249  Myosurus John Thomas Howell 1976-7-20 52033 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  CAS-BOT-BC83233  Myosurus minimus John Thomas Howell 1931-3-29 6014 San Benito 1.5 miles southeast of San Benito. Comment
  CAS-BOT-BC83318  Myosurus minimus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49489 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CAS-BOT-BC83327  Myosurus minimus John Thomas Howell 1929-4-27 4209 Merced 3 miles northwest of Merced on Oakdale Road. 51 Comment
  CAS-BOT-BC259941  Nassella lepida John Thomas Howell 1941-4-17 s.n. Marin Tiburon Comment
  RSA127383  Nassella lepida J. T. Howell 1946-5-16 21896 Marin North side of Angel Island Comment
  CAS-BOT-BC260166  Nassella pulchra John Thomas Howell 1938-5-22 13794 Marin San Anselmo Canyon Comment
  CAS-BOT-BC260201  Nassella pulchra John Thomas Howell 1956-5-6 31342 San Francisco Sierra and 22nd Streets, San Francisco Comment
  UCD87547  Nassella pulchra John Thomas Howell 1930-4-13 4697 Calaveras 3 miles west of San Andreas. On raod to Valley Springs. Comment
  RSA579  Navarretia hamata subsp. hamata J. T. Howell 1927-6-11 85 San Bernardino Highland Avenue, east of Upland. 305 Comment
  UCD48713  Navarretia viscidula John Thomas Howell 1945-7-15 21303 Marin Near Meadow Club SW of Fairfax. Comment
  SEINET10460938  Nemacladus sigmoideus Howell 1958-5-23 Howell 33213 Kern Sandy flats 2 miles east of Walker Pass summit 1402 Comment
  CAS-BOT-BC230579  Nemophila parviflora var. quercifolia John Thomas Howell; Gordon H. True 1968-5-13 44273 Tulare North Meadow Creek, Kern Plateau 1981 Comment
  RSA98997  Nemophila pedunculata J. T. Howell 1953-5-24 29014 Tuolumne Between Long Barn and Pinecrest. 1707 Comment
  JEPS12225  Nicotiana obtusifolia John Thomas Howell 1927-11-26 3261 San Diego San Felipe Wash Comment
  UCR139451  Oenothera xylocarpa J. T. Howell 1948-8-1 25280 Mono Owens Valley, 3 mi south of Crestview 2300 Comment
  CAS-BOT-BC350001  Oreostemma alpigenum var. andersonii John Thomas Howell 1925-6-27 1211 El Dorado Rubicon Meadows, Lake Tahoe 2133 Comment
  CAS-BOT-BC350032  Oreostemma alpigenum var. andersonii John Thomas Howell 1946-7-14 22237 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC350046  Oreostemma alpigenum var. andersonii John Thomas Howell 1934-7-9 12515 Lassen Bridges Creek Spring Comment
  CAS-BOT-BC355636  Oreostemma alpigenum var. andersonii John Thomas Howell 1951-7-21 28075 Tulare Mineral King and Vicinity. White Chief region 3048 Comment
  UCD134706  Oreostemma alpigenum var. andersonii John Thomas Howell 1960-7-23 35964 Plumas Drakesbad, Dream Lake. Lassen Volcanic National Park. 1676 Comment
  CAS-BOT-BC499794  Orobanche corymbosa subsp. corymbosa John Thomas Howell 1977-8-3 52519 Alpine Sierra Nevada: Just N of Ebbetts Pass 2682 Comment
  CAS-BOT-BC499808  Orobanche corymbosa subsp. corymbosa John Thomas Howell 1938-8-7 14352 Mono Near Little Round Valley 2133 Comment
  CAS-BOT-BC500240  Orobanche robbinsii John Thomas Howell 1930-9-7 5460 San Francisco San Francisco: Land's End, the region of the type locality [of O. californica] Comment
  CAS-BOT-BC355665  Orochaenactis thysanocarpha John Thomas Howell 1949-7-17 25433 Inyo Little Cottonwood Creek 2987 Comment
  CAS-BOT-BC355732  Orochaenactis thysanocarpha John Thomas Howell; Gordon H. True 1970-7-29 47108 Tulare Just east of Pine Flat on road to Cannell Meadow. Kern Plateau 2255 Comment
  RSA118071  Orthocarpus purpurascens J. T. Howell 1955-5-19 30204 Monterey Avila Ranch, Santa Lucia Mountains, west of King City. 457 Comment
  RSA70481  Oxalis laxa J. T. Howell 1946-6-20 22099 Marin Stinson Beach. Comment
  UC643406  Oxypolis occidentalis John Thomas Howell 1940-7-28 15660 Fresno near Charlotte Creek; Bubbs Creek Comment
  CAS-BOT-BC413232  Oxyria digyna John Thomas Howell 1942-8-2 17581 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC413201  Oxyria digyna John Thomas Howell 1946-8-31 22939 El Dorado Mt. Tallac Comment
  CAS-BOT-BC202191  Oxytropis parryi John Thomas Howell 1947-8-14 24115 Inyo Inconsolable Range, above Thunder & Lightning Lake 3657 Comment
  CAS-BOT-BC318197  Packera breweri John Thomas Howell 1930-5-15 5156 Kern near Glenville, Greenhorn Range Comment
  CAS-BOT-BC316767  Packera cana John Thomas Howell 1950-7-21 27157 Tulare Monache Mt. 2590 Comment
  CAS-BOT-BC121015  Paeonia brownii J. T. Howell 1955-7-19 30751 Plumas Beckwourth 1493 Comment
  UCD89807  Panicum capillare subsp. hillmanii John Thomas Howell 1973-7-10 49808 Lassen Doyle. Comment
  CAS-BOT-BC253816  Panicum dichotomiflorum John Thomas Howell 1976-10-29 52264 El Dorado On Green Valley Road in Morman Island shopping center, about 4.5 miles NE of Folsom 137 Comment
  SEINET195364  Papaver californicum John Thomas Howell 1946-5-30 21962 Marin Little Carson Canyon. Comment
  RSA32280  Papaver californicum J. T. Howell 1946-5-30 21962 Marin Little Carson Canyon. Comment
  CAS-BOT-BC422854  Papaver rhoeas John Thomas Howell 1952-6-14 28357 Siskiyou 2 miles west of Gazelle Comment
  CAS-BOT-BC274088  Pappostipa speciosa John Thomas Howell 1958-8-2 34224 Fresno On zigzags of Copper Creek Canyon trail 1981 Comment
  CAS-BOT-BC274120  Pappostipa speciosa John Thomas Howell 1958-5-27 33511 Inyo Bishop Creek 2133 Comment
  GH360506  Parapholis incurva J. T. Howell 1945-5-6 20816 Unknown San Rafael Comment
  CAS-BOT-BC175628  Parnassia palustris John Thomas Howell 1940-7-31 15778 Tulare East Lake 2926 Comment
  CAS-BOT-BC259621  Paspalum dilatatum John Thomas Howell 1959-9-20 34668 Butte Eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC258769  Paspalum urvillei John Thomas Howell 1954-5-16 29656 El Dorado Placerville 563 Comment
  CAS-BOT-BC202849  Paxistima myrsinites John Thomas Howell 1939-8-4 15056 Siskiyou Near Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC169761  Pectocarya John Thomas Howell 1976-5-19 51781 Kern between Isabella Dam and Keysville. Greenhorn Mountains. Sierra Nevada 822 Comment
  SBBG54517  Pellaea andromedifolia J. T. Howell 1927-6-17 2551 Orange Santa Ana Cyn 152 Comment
  CAS-BOT-BC71508  Pellaea mucronata var. californica John Thomas Howell 1964-10-23 40982 Inyo Whitney Portal Road 2346 Comment
  CAS-BOT-BC71545  Pellaea mucronata var. californica John Thomas Howell; Gordon H. True 1968-5-12 44197 Tulare Brush Creek Canyon 1432 Comment
  CAS-BOT-BC67575  Pellaea mucronata var. californica John Thomas Howell 1967-6-22 42660 Plumas Sierra Nevada - Canyon of the Feather River North Fork, granite near mouth of Chambers Creek. 609 Comment
  SEINET5326551 Image available Penstemon caesius J. T. Howell, Gordon H. True 1970-6-24 46716 Tulare Kern Plateau, North Manter Creek, Big Meadow to Manter Meadow 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
  CAS-BOT-BC265387  Penstemon davidsonii var. davidsonii John Thomas Howell 1942-7-31 17478 Tulare Mount Kaweah Comment
  UCR89357  Penstemon grinnellii subsp. scrophularioides J. T. Howell, T. C. Fuller, G. D. Barbe 1980-7-16 53806 Tulare Sherman Pass Road, 4.5 mi east of jct with Cherry Hill Road 2256 Comment
  CAS-BOT-BC265505  Penstemon heterodoxus John Thomas Howell 1949-7-23 25651 Tulare Soldier Lake Comment
  GH367526  Penstemon newberryi var. berryi J. T. Howell 1939-8-2 14864 Unknown Marble Mts. Comment
  CAS-BOT-BC245667  Penstemon newberryi var. newberryi John Thomas Howell 1960-8-19 36194 Tehama Summit of Brokeoff Mt., Lassen Volcanic National Park 2804 Comment
  NY638942  Penstemon procerus var. brachyanthus J. T. Howell 1937-7-24 13390 Siskiyou Caribou Basin, Salmon-Trinity Alps 1981.2 Comment
  CAS-BOT-BC239491  Penstemon rydbergii var. oreocharis John Thomas Howell 1944-7-13 19743 Glenn Summit ridge north of Black Butte Comment
  CAS-BOT-BC239537  Penstemon rydbergii var. oreocharis John Thomas Howell 1944-8-10 20220 Mono North slope of Mt. Dana Comment
  NY651258  Penstemon rydbergii var. oreocharis J. T. Howell 1934-6-12 12022 Modoc Plum Valley, Warner Mountains Comment
  NY651260  Penstemon rydbergii var. oreocharis J. T. Howell 1981-6-23 54177 Plumas Long Valley at road to Maxwell Mine 1633.7 Comment
  CAS-BOT-BC239665  Penstemon sudans John Thomas Howell; Gordon H. True 1973-8-1 50153 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC222777  Perideridia parishii John Thomas Howell; Gordon H. True 1970-7-30 47208 Tulare Along Salmon Creek at north end of Big Meadow. Kern Plateau 2377 Comment
  CAS-BOT-BC413549  Persicaria amphibia John Thomas Howell 1963-8-5 39938 Monterey Along Watsonville-San Juan Road, about 2 miles south of Aromas Comment
  CAS-BOT-BC413684  Persicaria capitata John Thomas Howell 1972-8-17 s.n. Monterey On Lighthouse Ave. near Forest Ave., Pacific Grove Comment
  CAS-BOT-BC413740  Persicaria hydropiper John Thomas Howell 1932-9-18 10779 Sonoma Bank of slough draining Kenwood Marsh Comment
  CAS-BOT-BC418993  Persicaria lapathifolia John Thomas Howell 1970-9-25 47413 Kern Kernville 807 Comment
  CAS-BOT-BC419008  Persicaria lapathifolia John Thomas Howell 1927-10-29 3180 Los Angeles Near Alamitos Bay 15 Comment
  CAS-BOT-BC419210  Persicaria maculosa John Thomas Howell 1959-11-4 35112 Marin Stinson Beach Comment
  CAS-BOT-BC419300  Persicaria punctata John Thomas Howell 1956-12-3 31969 Mariposa 7.5 miles from Cathay on road to Planada Comment
  UC702957  Phacelia calthifolia John Thomas Howell 1928-4-1 3600 San Bernardino 37 mi n Baker Comment
  OBI13806  Phacelia distans John Thomas Howell 1948-6-15 24370 San Luis Obispo Hughes Cyn SE of Shandon 610 Comment
  SBBG29812  Phacelia distans J. T. Howell 1930-4-20 4741 Marin Point Reyes Comment
  SD72104  Phacelia distans John Thomas Howell 1928-1-15 3277 Orange Gypsum Station on side of Santa Ana CaA'on. 152 Comment
  UC702991  Phacelia distans John Thomas Howell 1928-6-10 3882 Los Angeles Deer Park San Gabriel Mts., Monrovia Canyon Comment
  SBBG41201  Phacelia egena J. T. Howell 1943-8-8 Tehama Anthony Pk Comment
  UCD120438  Phacelia egena John Thomas Howell 1928-5-27 3865 Los Angeles 1 mile west of Chandler's on the Ridge Route. Comment
Read comments
Apr 5 2016
  RSA427956  Phacelia frigida subsp. dasyphylla J. T. Howell 1948-7-31 25210 Fresno West side of Kearsarge Pass. 3354 Comment
  SD72087  Phacelia frigida subsp. dasyphylla John Thomas Howell 1946-8-31 22945 El Dorado Mt. Tallac Comment
  RSA1073  Phacelia grandiflora J. T. Howell 1928-6-29 999 Los Angeles Seminole Hot Springs Road, Santa Monica Mountains 457 Comment
  SBBG41378  Phacelia hastata J. T. Howell 1958-8-14 34440 Madera NE of Sadler Lake, East Fk of Granite Crk 3048 Comment
  UCD120478  Phacelia hastata John Thomas Howell 1934-7-8 12480 Lassen Champ's Flat. Comment
  UC941725  Phacelia imbricata John Thomas Howell 1951-7-22 28145 Tulare 1.5 mi e Slapjack Creek (on road to Mineral King); Sequoia Park 1737 Comment
  CAS-BOT-BC145043  Phacelia keckii John Thomas Howell 1931-5-30 6611 Riverside Santiago Peak, Santa Ana Mts. 1219 Comment
  CAS-BOT-BC145044  Phacelia keckii John Thomas Howell 1931-5-30 6611 Riverside Santiago Peak, Santa Ana Mts. 1219 Comment
  RSA602  Phacelia malvifolia J. T. Howell 1927-8-19 s.n. Monterey Cypress Point, Monterey Peninsula. 12 Comment
  UC702958  Phacelia malvifolia John Thomas Howell 1929-6-16 4312 San Francisco Point Lobos San Francisco (type locality) Comment
  JEPS55980  Phacelia mutabilis John Thomas Howell 1958-7-31 34149 A Fresno Simpson Meadow Sierra Nevada, Middle Fork of the Kings River 1828 Comment
  SBBG41209  Phacelia mutabilis J. T. Howell 1939-8-2 Siskiyou Spirit Lake, Marble Mtns 1828 Comment
  GH93444  Phacelia peirsoniana J. T. Howell 1938-8-7 14353 Unknown Near Little Round Valley, in crevices of volcanic rocks under pinyons Comment
  CAS-BOT-BC154333  Phacelia phacelioides John Thomas Howell 1978-5-4 52870 Contra Costa Burned area in chaparral near summit, Mt. Diablo 1066 Comment
  UC710566  Phacelia racemosa John Thomas Howell 1944-8-15 20505 Tuolumne between Young Lake and Tuolumne Meadows 2743 Comment
  CAS-BOT-BC159019  Phacelia ramosissima var. latifolia John Thomas Howell; Gordon H. True 1967-9-19 43907 Tulare Granitic rocks 0.5 mile west of South Fork Kern River bridge, Kennedy Meadows 1859 Comment
  CAS-BOT-BC159139  Phacelia ramosissima var. ramosissima John Thomas Howell 1963-6-22 39562 Monterey Priest Valley 685 Comment
  UC702960  Phacelia tanacetifolia John Thomas Howell 1929-3-27 4104 San Joaquin 6 1/2 mi w Tracy (road to Altamont) Comment
  CAS-BOT-BC265772  Phalaris aquatica John Thomas Howell 1945-8-12 21381 Marin Above salt marsh, Tiburon Comment
  CAS-BOT-BC265785  Phalaris aquatica John Thomas Howell 1963-6-21 39474 Monterey Between San Lucas and San Lorenzo Creek summit on road to Priest Valley Comment
  UC1177484  Phalaris aquatica John Thomas Howell 1941-6-10 16295 Marin Novato Comment
  GH360510  Phalaris canariensis J. T. Howell 1902-5-3 5446 Unknown Near Nelson Comment
  CAS-BOT-BC250609  Phalaris minor John Thomas Howell 1963-6-21 39452 Monterey King City 100 Comment
  CAS-BOT-BC250633  Phalaris minor John Thomas Howell 1933-5-7 11212 San Francisco Lone Mountain, San Francisco Comment
  CAS-BOT-BC250676  Phalaris minor John Thomas Howell; Gordon H. True 1967-6-11 42554 Yolo North of Woodland near Cache Creek Comment
  CAS-BOT-BC250809  Phleum alpinum John Thomas Howell; Gordon H. True 1967-7-4 43032 Tulare Fish Creek about 3.5 miles south of Troy Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC260845  Phleum pratense John Thomas Howell 1955-7-20 30861 Plumas Mohawk, Sierra Nevada 1371 Comment
  UC703071  Phlox diffusa John Thomas Howell 1942-7-29 17389 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC232837  Phlox pulvinata John Thomas Howell 1946-7-20 22579 Fresno S of Mono Rock 3596 Comment
  CAS-BOT-BC222619  Pholistoma auritum var. auritum John Thomas Howell 1931-4-14 6384 Santa Barbara China Harbor, Santa Cruz Island Comment
  CAS-BOT-BC134932  Phoradendron bolleanum John Thomas Howell 1962-7-11 38553 Kern NW slope of Black Mt. Greenhorn Mountains. Sierra Nevada 2133 Comment
  CAS-BOT-BC141168  Phoradendron serotinum subsp. macrophyllum John Thomas Howell 1971-1-15 47569 Monterey E Garrison Road, Camp Roberts (N of San Miguel) Comment
  CAS-BOT-BC452038  Phyllospadix torreyi John Thomas Howell 1943-10-3 19331 Marin On Muir Beach Comment
  CAS-BOT-BC140522  Physocarpus John Thomas Howell 1959-9-24 34938 Plumas Butterfly Creek near mouth Comment
  CAS-BOT-BC142250  Physocarpus capitatus John Thomas Howell 1958-6-28 33638 Marin Stream bank, Willow Meadow, Mt. Tamalpais Comment
  CDA3324  Phytolacca heterotepala J. T. Howell 1960-1-23 35131 San Francisco Golden Gate Park, San Francisco. 0 Comment
  CAS-BOT-BC73474  Picea breweriana John Thomas Howell 1939-8-2 14900 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  A246947  Pinus albicaulis J. T. Howell 1937-7-24 Unknown Caribou Basin, Salmon-Trinity Alps 1981 Comment
  CAS-BOT-BC73313  Pinus balfouriana John Thomas Howell; Gordon H. True 1970-6-25 46799 Tulare Sierra Nevada, Kern Plateau - on trail from Big Meadow to East Sirretta Pass. 2743 Comment
  CAS-BOT-BC78422  Pinus balfouriana John Thomas Howell 1942-7-31 17437 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  CAS-BOT-BC73212  Pinus flexilis John Thomas Howell 1949-8-13 26284 Inyo Little Cottonwood Creek 2895 Comment
  CAS-BOT-BC73102  Pinus lambertiana John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53012 Calaveras Sierra Nevada, ridgetop on volcanic agglomerate near Dorrington. 1524 Comment
  CAS-BOT-BC78933  Pinus monticola John Thomas Howell; Gordon H. True 1970-7-14 5515 Sierra At Verdi Peak Lookout, Verdi Range 2560 Comment
  CAS-BOT-BC78985  Pinus muricata John Thomas Howell 1944-3-26 19358 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC72875  Pinus ponderosa John Thomas Howell 1960-8-18 36014 Tehama Near Lassen Volcanic National Park, Morgan Summit 1752 Comment
  CAS-BOT-BC80050  Pinus washoensis John Thomas Howell; Gordon H. True 1970-7-14 5498 Sierra Crystal Peak [loop road] Loop Road ca. 0.5 miles west of Dog Valley Road near Dog Valley Campground 1950 Comment
  UCD94968  Piptatherum miliaceum John Thomas Howell 1954-8-4 30023 Santa Clara Palo Alto. Comper Street between University Avenue and Lytton Street. Comment
  UC517459  Plagiobothrys bracteatus John Thomas Howell 1933-5-14 11232 Contra Costa St. Mary's College Comment
  UCD120774  Plagiobothrys bracteatus John Thomas Howell 1941-6-10 16274 Marin Near Black Point. Comment
  UC526161  Plagiobothrys greenei John Thomas Howell 1934-3-27 11803 Sonoma summit of Bennett Valley Road from Glen Ellen to Santa Rosa Comment
  CAS-BOT-BC230967  Plagiobothrys hispidulus John Thomas Howell; H. Keith Wagnon 1980-5-27 53618 Plumas 1 mile W of Almanor 1386 Comment
  UC421643  Plagiobothrys mollis John Thomas Howell 1926-7-30 2156 Plumas Prattville 1371 Comment
  CAS-BOT-BC228476  Plagiobothrys myosotoides John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-15 53792 Tulare Along road, Cannell Meadow, Kern Plateau 2331 Comment
  UC421592  Plagiobothrys nothofulvus John Thomas Howell 1929-4-9 4135 Merced on Oakdale Road 7 mi from Merced (low hills bordering San Joaquin Valley) Comment
  GH403977  Plagiobothrys reticulatus var. rossianorum J. T. Howell 1930-6-8 5225 Unknown Bodega Road, 4 miles east of Valley Ford Comment
  CAS-BOT-BC230612  Plagiobothrys torreyi John Thomas Howell; Gordon H. True 1966-7-11 41709 Tulare Horse Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC245394  Plectritis macrocera John Thomas Howell 1934-6-11 11973 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC260954  Pleuropogon californicus var. californicus John Thomas Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio Comment
  CAS-BOT-BC260987  Pleuropogon californicus var. californicus John Thomas Howell 1931-4-1 6037 Sonoma 9 miles sw. of Sonoma on road to San Rafael Comment
  UC421657  Pluchea odorata var. odorata John Thomas Howell 1927-9-24 3117 Orange Santa Ana Canyon 152 Comment
  POM203048  Poa J. T. Howell 1934-6-14 12171 Modoc Near Lost Lake, Warner Mts. 2439 Comment
  RSA22160  Poa J. T. Howell 1937-7-24 13403 Siskiyou Caribou Basin, Salmon-Trinity Alps. 1982 Comment
  CAS-BOT-BC254607  Poa X limosa John Thomas Howell 1963-7-10 39696 Alpine At Grover Hot Springs 1798 Comment
  CAS-BOT-BC244443  Poa annua John Thomas Howell 1946-4-21 21696 Marin Near Point Reyes Lighthouse Comment
  CAS-BOT-BC255549  Poa annua John Thomas Howell 1956-7-1 31648 San Francisco Embarcadero and Vallejo Street, San Francisco Comment
  CAS-BOT-BC254882  Poa bolanderi John Thomas Howell 1944-8-6 20002 Tuolumne Between Dog Lake and Tuolumne Meadows Comment
  CAS-BOT-BC254952  Poa bulbosa John Thomas Howell 1972-4-25 48702 Mariposa Near Camp Curry, Yosemite Valley 1219 Comment
  SEINET7293871 Image available Poa bulbosa subsp. bulbosa John Thomas Howell, Gordon H. True 1969-1 45723 Tulare Roadside flat, mouth of Brush Creek, Kern River Canyon 1189 Comment
  CAS-BOT-BC254690  Poa cusickii subsp. epilis John Thomas Howell; Gordon H. True 1968-7-16 4411 Mono Virginia Lakes basin, ca. 3.25 miles SW of Conway Summit 2956 Comment
  SEINET10921572  Poa epilis John Thomas Howell 1944-8-12 Howell 20379 Tuolumne Gaylor Lakes. 3292 Comment
  CAS-BOT-BC246670  Poa howellii John Thomas Howell 1944-5-21 19487 Marin Canyon below Phoenix Lake, Mt. Tamalpais Comment
  CAS-BOT-BC255857  Poa kelloggii John Thomas Howell; Alice Eastwood 1936-5-23 2730 Mendocino 6.5 miles W of Orr's Hot Springs Comment
  RSA51441  Poa kelloggii J. T. Howell 1950-5-18 26311 Marin Lagunitas Creek near Camp Taylor. Comment
  CAS-BOT-BC246816  Poa leibergii John Thomas Howell 1942-8-7 17813 Tulare Columbine Lake Comment
  CAS-BOT-BC255902  Poa nervosa John Thomas Howell; Gordon H. True 1970-8-11 6201 A Nevada Carpenter Ridge, Independence Lake drainage, ca. 7.5 mi. west of Truckee-Sierraville Highway 2621 Comment
  CAS-BOT-BC247259  Poa palustris John Thomas Howell 1947-7-24 23581 San Bernardino Santa Ana River, San Bernardino Mts. 1920 Comment
  CAS-BOT-BC255201  Poa pratensis John Thomas Howell 1949-7-26 25781 Tulare Whitney Meadows 2956 Comment
  CAS-BOT-BC256050  Poa pratensis John Thomas Howell; Gordon H. True 1968-5-12 44208 Tulare Brush Creek Canyon, Kern Plateau, Sierra Nevada 1402 Comment
  POM303608  Poa pratensis J. T. Howell 1943-8-3 18937 Glenn Plaskett Meadows. 1829 Comment
  UCD90416  Poa secunda John Thomas Howell 1943-7-16 18397 Nevada Boreal Ridge. West side of Donner Pass near Norden. 2133 Comment
  RSA43356  Poa secunda J. T. Howell 1948-4-24 24217 San Luis Obispo east of Cholame Comment
  CAS-BOT-BC236316  Poa secunda subsp. juncifolia John Thomas Howell 1950-7-21 27160 Tulare Monache Mountain, Sierra Nevada 2590 Comment
  CAS-BOT-BC247072  Poa secunda subsp. juncifolia John Thomas Howell 1962-9-25 38903 Kern Kernville 807 Comment
  CAS-BOT-BC235997  Poa secunda subsp. secunda John Thomas Howell 1946-7-14 22357 Inyo Rock Creek Lake Basin, Mosquito Flat 3139 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-BC243011  Poa secunda subsp. secunda John Thomas Howell 1930-3-29 4601 A San Benito The Pinnacles Comment
  CAS-BOT-BC243372  Poa secunda subsp. secunda John Thomas Howell 1944-8-5 19964 Tuolumne Near Parsons Lodge, Tuolumne Meadows Comment
  CAS-BOT-BC244516  Poa secunda subsp. secunda John Thomas Howell 1943-8-8 19182 Mendocino Anthony Peak, Tehoma-Mendocino County Comment
  CAS-BOT-BC244529  Poa secunda subsp. secunda John Thomas Howell 1941-4-17 s.n. Marin Tiburon Peninsula Comment
  UC710538  Poa secunda subsp. secunda John Thomas Howell 1943-8-8 19182 Mendocino Anthony Peak; Tehama-Mendocino Co. Comment
  CAS-BOT-BC243069  Poa secunda subsp. secunda John Thomas Howell 1957-5-6 32198 San Diego San Francisco. Hunters Point Comment
  UCD91646  Poa secunda subsp. secunda John Thomas Howell 1958-4-28 33019 San Luis Obispo San Luis Obispo County: Carrisa Plains, just S of Soda Lake. Comment
  CAS-BOT-BC244141  Poa sierrae John Thomas Howell 1967-6-23 42740 Plumas Lewisia Rock, 3.5 miles SW of Belden, Feather River Canyon 609 Comment
  UC710589  Poa stebbinsii John Thomas Howell 1944-8-12 20379 Tuolumne Gaylor Lakes 3291 Comment
  RSA54047  Poa trivialis J. T. Howell 1948-5-7 24296 San Francisco Jackson St. Comment
  CAS-BOT-BC244333  Podagrostis humilis John Thomas Howell; Gordon H. True 1966-7-11 41649 Tulare Poison Meadow, Kern Plateau 2286 Comment
  UC1988933  Pogogyne serpylloides John Thomas Howell 1930-4-22 4747 Contra Costa Bald Peak Comment
  CAS-BOT-BC110513  Polygonum John Thomas Howell 1962-9-26 38957 Kern Sierra Nevada. Greenhorn Mountains. Glennville. 960 Comment
  CAS-BOT-BC110514  Polygonum John Thomas Howell 1962-9-21 38680 Kern Sierra Nevada. Kern River Canyon. 426 Comment
  CAS-BOT-BC414145  Polygonum aviculare subsp. aviculare John Thomas Howell 1969-8-26 45951 Tulare Mineral King 2377 Comment
  RSA88466  Polygonum davisiae J. T. Howell 1951-6-28 27692 Plumas Eureka Peak 1982 Comment
  CAS-BOT-BC218138  Polygonum douglasii John Thomas Howell 1934-6-11 11975 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC414469  Polygonum douglasii John Thomas Howell 1949-7-18 25457 Inyo Cottonwood Creek 3108 Comment
  CAS-BOT-BC414591  Polygonum douglasii John Thomas Howell 1937-7-21 13165 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC414552  Polygonum douglasii John Thomas Howell 1974-9-20 50889 Plumas 7 miles from Quincy on road to Blairsden 1097 Comment
  RSA127093  Polygonum fowleri J. T. Howell 1949-5-22 25326 Marin Salt marsh at head of Drakes Esters. Comment
  CAS-BOT-BC418619  Polygonum majus John Thomas Howell 1939-8-4 15035 Siskiyou Between Elk Mt. and Marble River, Marble Mts. Comment
  CAS-BOT-BC419978  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1944-8-5 19983 Tuolumne Near Parsons Lodge, Tuolumne Meadows Comment
  CAS-BOT-BC420095  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1940-8-2 15903 Tulare Slope north of Reflection Lake 3352 Comment
  CAS-BOT-BC419904  Polygonum polygaloides subsp. kelloggii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50649 Lassen Slope south and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC420142  Polygonum ramosissimum subsp. prolificum John Thomas Howell 1963-8-20 40129 Kern South Fork Valley about 2 miles northeast of Weldon 807 Comment
  SEINET12884257 Image available Polygonum sawatchense J. T. Howell 1925-1 1200 Unknown Comment
  CAS-BOT-BC420165  Polygonum sawatchense subsp. sawatchense John Thomas Howell 1925-6-27 1200 Placer Tahoe Tavern, Lake Tahoe 1889 Comment
  CAS-BOT-BC420173  Polygonum sawatchense subsp. sawatchense John Thomas Howell; Gordon H. True 1970-7-14 5550 Sierra Verdi Peak Road ca. 1 mile below Lookout. 2499 Comment
  CAS-BOT-BC420961  Polygonum sawatchense subsp. sawatchense John Thomas Howell 1950-7-13 26789 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  RSA18970  Polygonum spergulariiforme J. T. Howell 1937-7-21 13159 Siskiyou S Fork of Salmon river near Big Flat. 1524 Comment
  CAS-BOT-BC71983  Polypodium californicum John Thomas Howell 1957-5-6 32206 San Francisco Hunters Point Comment
  CAS-BOT-BC72095  Polypodium scouleri John Thomas Howell 1957-5-17 32314 San Francisco Bayview Hills Comment
  CAS-BOT-BC232951  Polypogon australis John Thomas Howell; Gordon H. True 1971-6-15 47826 Kern Flying Dutchman Creek canyon on Havilah-Mount Breckenridge road 1341 Comment
  UCD91200  Polypogon maritimus John Thomas Howell 1958-6-28 33633 Marin South side of Alpine Lake near Bon Tempe Dam, Mt. Tamalpais. Comment
  CAS-BOT-BC232466  Polypogon monspeliensis John Thomas Howell 1963-5-18 39326 Monterey 2.5 miles S of Aromas 60 Comment
  CAS-BOT-BC76694  Polystichum munitum John Thomas Howell; Gordon H. True 1970-5-27 46559 El Dorado Sierra Nevada - Rubicon River Canyon, near waterfall, N-NE of Leonardi Spring. 1127 Comment
  CAS-BOT-BC102504  Populus fremontii John Thomas Howell 1928-6-16 3980 Inyo Surprise [Canon] Canyon, Panamint Mts. 1432 Comment
  CAS-BOT-BC102713  Populus tremuloides John Thomas Howell 1944-8-14 s.n. Tuolumne Glen Aulin Comment
  CAS-BOT-BC102941  Populus trichocarpa John Thomas Howell 1960-3-21 35126 Monterey 3 miles se. of Carmel Valley Comment
  CAS-BOT-BC105584  Populus trichocarpa John Thomas Howell; Gordon H. True 1969-6-23 45816 Plumas Middle Fork of Feather River at Nelson Point - Sierra Nevada 1249 Comment
  POM180684  Porophyllum gracile J. T. Howell 1929-3-2 4097 Orange Rocky hills on N side of Santa Ana Canyon. 152 Comment
  RSA1556  Porophyllum gracile J. T. Howell 1928-7-10 1047 Riverside Hidden Canyon, Santa Ana Mts. 396 Comment
Read comments
Apr 24 2013
  CAS-BOT-BC453792  Potamogeton natans John Thomas Howell 1961-9-23 36860 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC453858  Potamogeton nodosus John Thomas Howell 1946-7-4 22185 Marin East of Aurora School at Sonoma Co. line Comment
  CAS-BOT-BC453924  Potamogeton pectinatus John Thomas Howell 1957-8-21 32917 San Francisco San Francisco. Quarry Lake, Golden Gate Park Comment
  RSA44400  Potamogeton robbinsii J. T. Howell 1947-8-15 24127 Inyo Fourth Lake, 10,800 ft., Big Pines Lakes. 3293 Comment
  CAS-BOT-BC143426  Potentilla John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53161 Alpine West base of Ebbetts Peak Comment
  CAS-BOT-BC141897  Potentilla anserina subsp. pacifica John Thomas Howell 1956-8-12 31761 San Francisco Alemany Blvd. near Bayshore Freeway - San Francisco Comment
  CAS-BOT-BC143093  Potentilla anserina subsp. pacifica John Thomas Howell 1966-4-18 41508 Marin Gully just north of John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC539499  Potentilla biennis John Thomas Howell; Gordon H. True 1966-7-11 41635 Tulare Poison Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC539500  Potentilla biennis John Thomas Howell; Gordon H. True 1970-7-30 47221 Tulare Along Salmon Creek at north end of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC539526  Potentilla biennis John Thomas Howell; Gordon H. True 1971-7-14 48440 Tulare Manter Meadow, Kern Plateau 2164 Comment
  CAS-BOT-BC143243  Potentilla flabellifolia John Thomas Howell 1946-7-15 22404 Inyo Ruby Lake, Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC158439  Potentilla glaucophylla var. glaucophylla John Thomas Howell 1949-7-19 25516 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC540006  Potentilla gracilis John Thomas Howell 1958-7-22 33768 Fresno Sierra Nevada, Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC540357  Potentilla gracilis var. fastigiata John Thomas Howell 1941-7-31 16579 Madera Agnew Pass Comment
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  RSA85735  Potentilla newberryi J. T. Howell 1934-7-2 12359 Modoc East side of Clear Lake Comment
  CAS-BOT-BC158193  Prunus emarginata John Thomas Howell 1961-6-20 36537 Shasta On Chaos Crags Trail near Manzanita Lake 1889 Comment
  CAS-BOT-BC158266  Prunus fasciculata var. fasciculata John Thomas Howell; Gordon H. True 1969-5-13 45637 Kern Spanish Needle Creek road to Lamont Meadow 1280 Comment
  CAS-BOT-BC151172  Prunus subcordata John Thomas Howell 1964-4-28 40636 Mariposa Bootjack - Sierra Nevada 685 Comment
  CAS-BOT-BC356515  Pseudognaphalium beneolens John Thomas Howell 1959-9-21 34737 Plumas Belden 701 Comment
  CAS-BOT-BC356946  Pseudognaphalium californicum John Thomas Howell 1928-4-21 3743 Ventura At Pt. Mugu 45 Comment
  CAS-BOT-BC356960  Pseudognaphalium canescens John Thomas Howell 1976-8-12 52226 Mariposa Glacier Point 2194 Comment
  CAS-BOT-BC357031  Pseudognaphalium luteoalbum John Thomas Howell 1962-9-22 38725 Kern 2 miles east of Kern Co. Park, Greenhorn Mountains 1432 Comment
  CAS-BOT-BC357048  Pseudognaphalium luteoalbum John Thomas Howell 1964-4-28 40595 Mariposa 2 miles east of Morman Bar 670 Comment
  CAS-BOT-BC357087  Pseudognaphalium luteoalbum John Thomas Howell 1943-6-29 18243 San Francisco Concert Valley, Golden Gate Park, San Francisco Comment
  CAS-BOT-BC357249  Pseudognaphalium microcephalum John Thomas Howell 1958-7-25 33910 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC361532  Pseudognaphalium stramineum John Thomas Howell 1926-4-24 1938 San Francisco Near Lake Merced, San Francisco Comment
  CAS-BOT-BC361559  Pseudognaphalium stramineum J. T. Howell 1961-4-14 36498 San Luis Obispo Santa Lucia Mountains. Cambria Comment
  CAS-BOT-BC361484  Pseudognaphalium stramineum John Thomas Howell 1951-6-29 27764 Plumas Feather River Canyon 548 Comment
  UC120047  Pseudostellaria jamesiana Thos. Howell 1889-4-16 1337 Siskiyou Hornbrook Comment
  CAS-BOT-BC361688  Psilocarphus John Thomas Howell 1954-6-5 29930 Tuolumne Near Long Barn Comment
  CAS-BOT-BC361823  Psilocarphus brevissimus var. brevissimus John Thomas Howell 1965-5-9 41308 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC361737  Psilocarphus brevissimus var. brevissimus John Thomas Howell; Gordon H. True 1971-5-26 47608 Yuba About 8 miles east of Marysville 30 Comment
  CAS-BOT-BC453500  Pterospora andromedea John Thomas Howell; Gordon H. True 1973-7-31 50024 Lassen Sierra Nevada, on road from Janesville to Thompso Peak, Diamond Range 1737 Comment
  CAS-BOT-BC466288  Pterospora andromedea John Thomas Howell; Gordon H. True 1966-7-12 41849 Kern Sierra Nevada. Kern Plateau. At spring in Bartolas Country, easterly from Cane Meadow 2194 Comment
  CAS-BOT-BC421239  Pterostegia drymarioides John Thomas Howell 1963-5-5 39008 Monterey Mustang Grade, west of Priest Valley 670 Comment
  CAS-BOT-BC143782  Purshia stansburyana John Thomas Howell 1928-6-14 3907 Inyo Surprise Canyon, Panamint Mts. 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
  RSA216195  Pyracantha fortuneana J. T. Howell 1959-11-4 35111 Marin At Stinson Beach Comment
  CAS-BOT-BC462854  Pyrola asarifolia John Thomas Howell 1925-7-5 1379 El Dorado Armstrong's, Emerald Bay, Lake Tahoe 1889 Comment
  CAS-BOT-BC462899  Pyrola asarifolia John Thomas Howell 1963-6-3 39398 Plumas Sierra Nevada, Butterfly Valley Comment
  CAS-BOT-BC465520  Pyrola asarifolia John Thomas Howell; Gordon H. True 1970-6-25 46777 Tulare Sierra Nevada, Kern Plateau: East branch of Salmon Creek, Big Meadow to Sirretta Meadows 2590 Comment
  CAS-BOT-BC462625  Pyrola dentata John Thomas Howell 1958-8-2 34193 Fresno Sierra Nevada: Copper Creek Canyo Trail 2286 Comment
  CAS-BOT-BC465991  Pyrola minor John Thomas Howell 1947-7-25 23635 San Bernardino San Bernardino Mts., East of Dry Lake 2804 Comment
  CAS-BOT-BC362187  Pyrrocoma apargioides John Thomas Howell 1949-8-12 26250 Inyo Cottonwood Creek 3108 Comment
  CAS-BOT-BC50354  Pyrrocoma lanceolata var. lanceolata John Thomas Howell 1934-6-15 12185 Modoc Alturas. 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-BC62484  Quercus chrysolepis John Thomas Howell 1930-10-25 5681 Monterey Santa Lucia Mountains. Canyon of the Arroyo Seco River Comment
  CAS-BOT-BC62540  Quercus chrysolepis John Thomas Howell 1956-9-23 31878 Marin Near Laurel Dell, Mt. Tamalpais Comment
  CAS-BOT-BC86561  Quercus chrysolepis John Thomas Howell 1962-5-22 37256 Tulare Kern River Canyon above Roads End 1097 Comment
  UCD45578  Quercus chrysolepis var. nana John Thomas Howell 1962-7-11 38583 Kern Summit ridge, Black Mt., el. 7400 ft. Greenhorn Mountain, Kern County. 2255 Comment
  CAS-BOT-BC86862  Quercus douglasii John Thomas Howell 1970-9-24 47355 Kern S of Bodfish 853 Comment
  CAS-BOT-BC86894  Quercus douglasii John Thomas Howell 1940-6-29 15587 A Lake Cobb Mt. on road from Adams Springs to Middletown Comment
  A344917  Quercus garryana J. T. Howell 1943-8-6 19139 Unknown Meadows se. of Black Butte Comment
  CAS-BOT-BC94356  Quercus garryana John Thomas Howell 1945-7-15 21301 Marin Fairfax Hills near Camp Lilienthal Comment
  CAS-BOT-BC62759  Quercus garryana var. breweri John Thomas Howell 1934-7-4 12383 Siskiyou Lava beds between Timbered Crater and Little Hot Springs Valley Comment
  UCD46131  Quercus garryana var. semota John Thomas Howell 1962-7-8 38255 Kern Sierra Nevada. Greenhorn Mountains. South side of Black Mt. 1432 Comment
  CAS-BOT-BC94761  Quercus john-tuckeri John Thomas Howell 1931-9-7 8065 San Benito San Benito Canyon, 10 miles NW of Hernandez Comment
  CAS-BOT-BC105247  Quercus kelloggii John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49159 Lassen Elysian Valley NW of Janesville 1325 Comment
  CAS-BOT-BC105494  Quercus kelloggii John Thomas Howell 1936-8-28 12869 Trinity 12 miles from Douglas City on road to Peanut Comment
  UCD46632  Quercus kelloggii John Thomas Howell; Gordon H. True 1967-9-18 43812 Tulare At spring ca. 3 miles from Chimney Meadow on road to Long Valley, Kern Plateau, Tulare County. 2194 Comment
  UCD46654  Quercus kelloggii John Thomas Howell 1958-5-26 33410 Inyo Onion Valley road, Inyo County; 2438 Comment
  CAS-BOT-BC62880  Quercus lobata John Thomas Howell 1930-10-19 5608 Napa Pope Valley School, Pope valley Comment
  A343462  Quercus tomentella J. T. Howell 1931-4-13 6326 Unknown Santa Cruz Island near the west end Comment
  CAS-BOT-BC104748  Quercus wislizeni John Thomas Howell; Gordon H. True 1971-6-15 47751 Kern Sierra Nevada. Flying Dutchman Creek canyon on Havilah Mt., Breckenridge road 1188 Comment
  CAS-BOT-BC362409  Rafinesquia John Thomas Howell 1925-3-22 805 Alameda Arroyo Mocho Comment
  CAS-BOT-BC362434  Rafinesquia californica John Thomas Howell 1933-7-9 11428 San Francisco Lake Merced, San Francisco Comment
  CAS-BOT-BC362679  Raillardella argentea John Thomas Howell 1943-7-20 18628 Nevada Castle Peak Comment
  CAS-BOT-BC362806  Raillardella scaposa John Thomas Howell 1946-7-15 22397 Inyo Ruby Lake, Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC186667  Ranunculus John Thomas Howell 1963-8-22 40280 Alpine 0.5 mile w. of Monitor Pass 2529 Comment
  RSA215992  Ranunculus californicus J. T. Howell 1957-5-17 32263 San Francisco Bayview Hills Comment
  UC1176751  Ranunculus californicus John Thomas Howell 1946-4-14 21631 Marin near Dillons Beach Comment
  CAS-BOT-BC378613  Ranunculus californicus var. californicus John Thomas Howell 1931-4-10 6205 Santa Barbara Santa Cruz Island, Valle del Medio Comment
  CAS-BOT-BC378740  Ranunculus californicus var. cuneatus John Thomas Howell 1940-5-20 15501 Marin Pt. Reyes Comment
  CAS-BOT-BC83442  Ranunculus lobbii John Thomas Howell 1947-6-4 s.n. Marin Radio Station, Point Reyes Peninsula. Comment
  UC169535  Ranunculus occidentalis Thos. Howell 1892-4-18 1401 Del Norte Crescent City; near the sea Comment
  CAS-BOT-BC74334  Raphanus sativus John Thomas Howell 1964-6-29 40764 San Luis Obispo Cambria. Comment
  CAS-BOT-BC427529  Reseda alba John Thomas Howell 1934-10-25 12577 San Francisco San Francisco Comment
  SD149111  Rhamnus John Thomas Howell, T. C. Fuller, G. D. Barbe 1981-6-25 54298 Plumas East side of Indian Valley just north of Taylorsville 1111 Comment
  CAS-BOT-BC59572  Rhamnus alnifolia John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54408 Plumas Sierra Nevada - Walker Plain, about 8 miles southwest of Bucks Lake on road to Oroville 1524 Comment
  CAS-BOT-BC56012  Rhamnus ilicifolia John Thomas Howell 1928-3-2 3362 Los Angeles Vermont Canyon, Griffith Park Comment
  CAS-BOT-BC59512  Rhamnus ilicifolia John Thomas Howell; Alice Eastwood 1938-5-4 5432 Madera Near North Fork Comment
  CAS-BOT-BC59878  Rhamnus ilicifolia John Thomas Howell; Gordon H. True 1968-5-13 44334 Butte Cherry Hill Road at Rincon Trail, Brush Creek Canyon. Kern Plateau. 1463 Comment
  RSA459  Rhamnus tomentella subsp. tomentella J. T. Howell 1927-8-7 615 San Diego Between Campo and Buckman Springs. 915 Comment
  RSA445  Rhus trilobata var. quinata J. T. Howell 1927-6-11 83 San Bernardino Highland Avenue, east of Upland. 305 Comment
  CAS-BOT-BC6187  Rhynchospora californica John Thomas Howell 1936-7-26 12679 Sonoma Pitkin Marsh, 5 miles N of Sebastopol Comment
  UCD141231  Rhynchospora californica John Thomas Howell 1945-7-18 21321 Sonoma Pitkin Marsh. Comment
  RSA94069  Rhynchospora californica J. T. Howell 1945-7-18 s.n. Sonoma Pitkin Marsh Comment
  POM303623  Rhynchospora capitellata J. T. Howell 1936-7-26 12677 Sonoma Pitkin Marsh, 5 miles north of Sebastopol. Comment
  RSA74059  Rhynchospora capitellata J. T. Howell 1936-7-26 12677 Sonoma Pitkin Marsh, 5 miles north of Sebastopol. Comment
  UCR89360  Ribes amarum J. T. Howell 1960-5-2 35244 Mariposa Sierra Nevada Mtns, Serpentine area NW of Coulterville Comment
  CAS-BOT-BC92535  Ribes binominatum John Thomas Howell 1937-7-25 13458 Siskiyou Caribou Basin, Salmon-Trinity Alps. 2286 Comment
  RSA127373  Ribes californicum J. T. Howell 1943-5-16 18114 Alameda Lower part of Arroyo del Valle. Comment
  CAS-BOT-BC93007  Ribes californicum var. californicum John Thomas Howell 1930-3-30 4641 Santa Clara West side of Pacheco Pass. 304 Comment
  CAS-BOT-BC93301  Ribes cereum John Thomas Howell 1925-7-6 1418 El Dorado Summit of Mount Tallac, Lake Tahoe region. Comment
  CAS-BOT-BC93313  Ribes cereum John Thomas Howell 1948-7-22 24839 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 3048 Comment
  CAS-BOT-BC169078  Ribes inerme var. inerme John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53130 Alpine Subalpine slope west of Ebbetts Peak - Sierra Nevada 2712 Comment
  CAS-BOT-BC169100  Ribes inerme var. inerme John Thomas Howell 1948-7-21 24807 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC173285  Ribes lacustre John Thomas Howell 1937-7-22 13305 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  UC421660  Ribes malvaceum John Thomas Howell 1930-3-29 4605 San Benito The Pinnacles Comment
  CAS-BOT-BC206018  Ribes menziesii John Thomas Howell 1942-4-26 16951 Contra Costa Oakland Hills near Redwood Peak Comment
  CAS-BOT-BC212936  Ribes montigenum John Thomas Howell 1948-7-21 24818 Fresno Bubbs Creek Canyon, in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC219196  Ribes nevadense John Thomas Howell 1923-6-10 45 Mariposa Merced River at the Indian Bridge, Wawona 1219 Comment
  A381035  Ribes viscosissimum var. hallii J. T. Howell 1944-7-16 19823 Unknown Snow Basin north of Black Butte 1676 Comment
  POM203710  Romanzoffia californica J. T. Howell 1931-4-18 6411 Sonoma Larkspur Rock near Bodega Bay. Comment
  CAS-BOT-BC74539  Rorippa curvisiliqua John Thomas Howell 1941-8-9 16893 Madera Near Garnet Lake. 2956 Comment
  CAS-BOT-BC74729  Rorippa curvisiliqua John Thomas Howell 1955-6-13 30384 Trinity Hayfork. 716 Comment
  SEINET5763345 Image available Rorippa sinuata John Thomas Howell 1934-1 12019 Modoc Plum Valley; Warner Mountains Comment
  CAS-BOT-BC146344  Rosa John Thomas Howell 1964-10-24 41031 Alpine Canyon of East Fork of Carson River 2 miles se. of Markleeville Comment
  CAS-BOT-BC147535  Rosa californica J. T. Howell 1933-8-27 11629 Napa Sage Canyon, Napa Range Comment
  CAS-BOT-BC147652  Rosa californica John Thomas Howell 1931-4-12 6279 Santa Barbara Cochie Canyon, Santa Cruz Island Comment
  UC1177434  Rosa eglanteria John Thomas Howell 1946-6-13 22057 Marin n Dillons Beach; Estero School Comment
  CAS-BOT-BC274226  Rostraria cristata John Thomas Howell 1956-4-16 31248 Alameda Paru & Dayton streets, Alameda Comment
  CAS-BOT-BC147250  Rubus parviflorus John Thomas Howell 1962-7-10 38457 Kern Near Shirley Meadows. Greenhorn Mountains 1981 Comment
  CAS-BOT-BC147332  Rubus parviflorus John Thomas Howell 1942-7-24 17124 Tulare Mineral King Comment
  CAS-BOT-BC158836  Rubus ursinus John Thomas Howell 1938-5-22 13799 Marin San Anselmo Canyon Comment
  CAS-BOT-BC158842  Rubus ursinus John Thomas Howell 1938-6-19 13921 Marin Bootjack, Mt. Tamalpais Comment
  POM261521  Rubus ursinus var. sirbenus J. T. Howell 1938-5-22 13788 Marin San Anselmo Canyon. Comment
  CAS-BOT-BC421910  Rumex acetosella John Thomas Howell 1962-6-15 37477 Butte Magalia 731 Comment
  JEPS58028  Rumex acetosella John T. Howell 1923-6-5 28 Mariposa near Hotel Wawona; Wawona Valley Comment
  UCD101033  Rumex acetosella John Thomas Howell 1946-8-31 22942 El Dorado Mt. Tallac. 2895 Comment
  CAS-BOT-BC422179  Rumex californicus John Thomas Howell 1949-7-26 25797 Tulare Golden Trout Creek 2941 Comment
  CAS-BOT-BC422200  Rumex californicus John Thomas Howell; Gordon H. True 1968-5-14 44423 Tulare Cherry Hill Road, Brush Creek Canyon, Kern Plateau 1219 Comment
  CAS-BOT-BC421723  Rumex conglomeratus John Thomas Howell 1930-9-28 5521 San Joaquin Holt Comment
  CAS-BOT-BC433517  Rumex fueginus John Thomas Howell 1963-11-19 40410 Monterey Robert's Lake, Seaside Comment
  CAS-BOT-BC433531  Rumex fueginus John Thomas Howell 1956-8-26 31797 San Francisco San Francisco. Strand of Pine Lake Comment
  CAS-BOT-BC109394  Rumex paucifolius John Thomas Howell 1942-7-29 17359 Tulare Little Five Lakes Basin. Comment
  SEINET12899116 Image available Rumex salicifolius J. T. Howell 1947-1 23340 Unknown Comment
  CAS-BOT-BC434116  Rumex transitorius John Thomas Howell 1946-6-13 22021 Marin Chileno Valley Comment
  CAS-BOT-BC434300  Rumex triangulivalvis John Thomas Howell 1943-7-19 18589 Placer Summit Valley Comment
  RSA128314  Sagina decumbens subsp. occidentalis J. T. Howell 1946-4-21 21689 Marin Dunes near radio station, Pt. Reyes Peninsula Comment
  A382361  Salix arctica J. T. Howell 1940-8-2 15918 Unknown West of Reflection Lake 3352 Comment
  CAS-BOT-BC132801  Salix arctica John Thomas Howell 1946-7-26 22784 Fresno Fourth Recess Comment
  CAS-BOT-BC132832  Salix arctica John Thomas Howell 1944-8-10 20214 Mono North slope of Mt. Dana Comment
  CAS-BOT-BC103055  Salix bonplandiana John Thomas Howell; Catherine Best 1983-4-19 54720 Kern Kern River Preserve of The Nature Conservancy, South Fork Valley near Weldon Comment
  CAS-BOT-BC108659  Salix bonplandiana John Thomas Howell 1964-4-29 40680 Tuolumne In belt of metamorphic rocks at Tuolumne River bridge, 2.5 miles east of Jacksonville 198 Comment
  CAS-BOT-BC129868  Salix bonplandiana John Thomas Howell; Alice Eastwood 1940-3-29 7818 Inyo Grapevine Canyon, Death Valley Comment
  CAS-BOT-BC103226  Salix bonplandiana John Thomas Howell 1925-4-11 954 Napa Soscol Comment
  NY177721  Salix drummondiana J. T. Howell 1958-5-24 33260 Inyo Whitney portal 2529.8 Comment
  CAS-BOT-BC103458  Salix eastwoodiae John Thomas Howell 1951-8-21 28276 Sierra Yuba Pass 2042 Comment
  RSA201399  Salix eastwoodiae J. T. Howell 1940-8-4 15961 Tulare East Lake. 2927 Comment
  NY188441  Salix eriocephala subsp. mackenzieana J. T. Howell 1981-8-11 54451 Mono East end of Convict Lake 2316.5 Comment
  CAS-BOT-BC103738  Salix exigua John Thomas Howell 1954-5-17 29770 El Dorado Spanish Ravine, Placerville 609 Comment
  CAS-BOT-BC108391  Salix exigua John Thomas Howell 1970-11-9 47549 Kern Sourth Fork Valley near Onyx on road to Weldon - Sierra Nevada 822 Comment
  CAS-BOT-BC107941  Salix geyeriana John Thomas Howell 1943-7-23 18724 Nevada Between Donner Pass and West Lake Comment
  CAS-BOT-BC107835  Salix gooddingii J. T. Howell 1959-9-20 34657 Butte Lower foothills, eastern outskirts of Oroville - Sierra Nevada 60 Comment
  CAS-BOT-BC104148  Salix hindsiana John Thomas Howell 1939-9-3 15347 Marin San Antonio Creek Comment
  UCD111095  Salix jepsonii John Thomas Howell 1961-6-20 36564 Shasta Lassen Highway east of Diamond Peak. Comment
  CAS-BOT-BC106939  Salix laevigata John Thomas Howell 1960-6-6 35326 Fresno Kings Canyon road 8 miles west of Horseshoe Bend 1463 Comment
  RSA503343  Salix laevigata J. T. Howell 1960-3-25 35167 Kern 10 miles east of Onyx. Comment
  GH384173  Salix lasiandra J. T. Howell 1963-7-10 39689 Unknown Meadow at Grover Hot Springs 1798 Comment
  CAS-BOT-BC128093  Salix lasiandra var. lasiandra John Thomas Howell 1964-4-18 40436 Monterey Robinson Canyon - Santa Lucia Mountains Comment
  CAS-BOT-BC128163  Salix lasiandra var. lasiandra John Thomas Howell 1963-8-20 40192 Inyo Whitney Portal - Sierra Nevada 2438 Comment
  CAS-BOT-BC129463  Salix lasiandra var. lasiandra John Thomas Howell 1970-9-22 47308 Tulare Fairview - Sierra Nevada 1066 Comment
  CAS-BOT-BC125307  Salix lasiandra var. lasiandra John Thomas Howell 1960-7-21 35839 Plumas Flats nw. of Willow Lake 1676 Comment
  CAS-BOT-BC107162  Salix lasiolepis var. bigelovii John Thomas Howell 1957-5-26 32420 San Francisco North base of Lone Mt. - San Francisco Comment
  CAS-BOT-BC124384  Salix lasiolepis var. lasiolepis John Thomas Howell 1964-4-18 40435 Monterey Robinson Canyon, Santa Lucia Mts. Comment
  CAS-BOT-BC128258  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1970-6-24 46729 Tulare North Manter Creek, Big Meadow to Manter Medow - Kern Plateau, Sierra Nevada 2438 Comment
  CAS-BOT-BC128285  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1971-7-16 48639 Tulare Yellow Pine Forest near Last Chance Creek, about 2 miles northwest of Johnsondale 2042 Comment
  CAS-BOT-BC129576  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1969-4-8 45487 Butte Near Pulga Bridge west of Pulga - Sierra Nevada 411 Comment
  CAS-BOT-BC124788  Salix lemmonii John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54095 Plumas 10.6 miles northeast of La Porte on road to Quincy 1889 Comment
  CAS-BOT-BC125600  Salix lutea John Thomas Howell; Gordon H. True 1969-10-1 46453 Tulare Taylor Meadow. Kern Plateau 2286 Comment
  CAS-BOT-BC129386  Salix melanopsis John Thomas Howell 1976-7-16 51897 Plumas Hydraulic mining gravels on flood plain of Spanish Cr. at mouth of Wapaunsie Creek - Sierra Nevada 1097 Comment
  CAS-BOT-BC129482  Salix melanopsis John Thomas Howell 1954-6-4 29914 Stanislaus Knights Ferry Comment
  CAS-BOT-BC125861  Salix orestera John Thomas Howell 1940-8-1 15844 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC129370  Salix orestera John Thomas Howell 1946-7-22 22637 Fresno Mt. Hopkins Comment
  A384424  Salix planifolia var. monica J. T. Howell 1946-7-28 22813 Unknown Long Lake, Rock Creek Lake Basin 3230 Comment
  CAS-BOT-BC128971  Salix sitchensis John Thomas Howell 1937-7-25 13465 Siskiyou Caribout Basin, Salmon-Trinity Alps 2286 Comment
  SEINET8140216 Image available Salix sitchensis J. T. Howell 1947-1 23345 Unknown Comment
  CAS-BOT-BC180701  Salsola tragus John Thomas Howell 1950-11-9 27486 Los Angeles Along Ridge Route, 12 miles north of Castaic 609 Comment
  CAS-BOT-BC180759  Salsola tragus John Thomas Howell 1965-5-9 41297 Tulare Vernal pool natural area in Valley Grassland, about 4 1/2 miles east-northeast of Pixley 83 Comment
  RSA270  Salsola tragus J. T. Howell 1927-7-27 499 Orange Near ranch houses, Rancho Santa Ana 152 Comment
  CAS-BOT-BC175657  Salsola tragus John Thomas Howell 1930-10-5 5540 Solano Near Sacramento River bridge, Rio Vista Comment
  RSA662  Salvia columbariae J. T. Howell 1928-3-18 891 Orange Rancho Santa Ana, Botanic Garden. 152 Comment
  CAS-BOT-BC220813  Salvia dorrii var. pilosa John Thomas Howell; Gordon H. True 1967-5-30 42477 Tulare About midway between Lamont Meadow and Long Valley, Kern Plateau 1554 Comment
  JEPS33664  Salvia leucophylla John Thomas Howell 1928-4-21 3734 Ventura Pt. Mugu 60 Comment
  CAS-BOT-BC238671  Sambucus nigra subsp. caerulea John Thomas Howell 1947-8-13 24046 Inyo Big Pine Creek Trail 3048 Comment
  POM304564  Saxifraga aprica John T. Howell 1942-7-29 17365 Tulare Little Five Lakes Basin. Comment
  RSA22019  Saxifragopsis fragarioides John T. Howell 1939-8-3 14990 Siskiyou Spirit Lake, Marble Mountains. 1829 Comment
  CAS-BOT-BC283652  Schedonorus pratensis John Thomas Howell 1939-8-9 15200 Siskiyou Sky High Valley, Marble Mountains 1828 Comment
  CAS-BOT-BC283639  Schedonorus pratensis John Thomas Howell 1956-5-11 31365 San Francisco Vacant lot, Fell St near Baker St, San Francisco Comment
  CAS-BOT-BC239865  Schismus arabicus John Thomas Howell 1957-4-30 32117 Monterey San Lorenzo Creek 4.5 miles from King City 121 Comment
  CAS-BOT-BC111318  Schoenoplectus acutus var. occidentalis John Thomas Howell 1947-6-18 23260 Marin Laguna, Chileno Valley Comment
  CAS-BOT-BC111242  Schoenoplectus californicus John Thomas Howell 1944-9-10 20721 Marin Marshes north of Olema Comment
  CAS-BOT-BC35556  Scirpus congdonii John Thomas Howell 1937-7-30 13681 Trinity Summit of Scott Mtn., north of Carville Comment
  CAS-BOT-BC111010  Scirpus microcarpus John Thomas Howell 1960-7-19 35645 Plumas Wet slope near hot springs, Drakesbad. 1828 Comment
  CAS-BOT-BC239968  Scribneria bolanderi John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52897 Calaveras Near Wallace 66 Comment
  JEPS59032 Image available Scrophularia californica John Thomas Howell 1957-5-6 32206 A San Francisco Hunters Point. Comment
  CAS-BOT-BC214194  Scutellaria John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54202 Plumas 2.5 miles northeast of Quincy Junction on road to Mt. Hough, Sierra Nevada 1280 Comment
  CAS-BOT-BC240056  Secale cereale John Thomas Howell 1954-5-16 29637 El Dorado 2 miles northwest of Placerville Comment
  CAS-BOT-BC417753  Sedella pumila John Thomas Howell 1954-5-17 29737 El Dorado 1 mile SW of Garden Valley 609 Comment
  GH395107  Sedum kiersteadiae J. T. Howell 1937-7-25 13502 Unknown Stuarts Fork of Trinity River 1981 Comment
  CAS-BOT-BC64094  Sedum lanceolatum John Thomas Howell 1937-7-29 13664 Trinity Scott Mt., on Trinity/Siskiyou county line. Comment
  CAS-BOT-BC69079  Sedum lanceolatum John Thomas Howell 1942-8-2 15898 Tulare Slope N of Reflaction Lake 3352 Comment
  CAS-BOT-BC64642  Sedum oregonense John Thomas Howell 1939-8-2 14905 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  SEINET10470958  Selaginella bigelovii John Thomas Howell 1927-7-22 Howell 2834 Orange Claymine Canyon, Santa Ana Mts., On hot and exposed opens between shrubs on very steep hillsides and in the cracks and crevices of sandstone outcrops, Upper Sonoran Zone. 185 Comment
  CAS-BOT-BC62143  Selaginella hansenii John Thomas Howell 1964-4-27 40534 Mariposa Merced River Canyon just west of El Portal 640 Comment
  CAS-BOT-BC327385  Senecio aphanactis John Thomas Howell 1931-4-13 6340 A Santa Barbara Near the west end Santa Cruz Island Comment
  CAS-BOT-BC363337  Senecio aronicoides John Thomas Howell 1924-6-8 386 Mariposa Wawona Road to the Big Trees, Wawona Valley 1310 Comment
  RSA0012558  Senecio hydrophiloides J. T. Howell 1949-8-12 26248 Inyo Cottonwood Creek. 3232 Comment
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Jun 21 2019
  RSA0012740  Senecio hydrophilus J. T. Howell 1946-9-20 23014 Marin Chileno Valley Comment
  CAS-BOT-BC363999  Senecio integerrimus var. major John Thomas Howell 1925-6-27 1192 Placer Tahoe Tavern, Lake Tahoe 1889 Comment
  CAS-BOT-BC364184  Senecio serra John Thomas Howell 1951-7-22 28105 Tulare Mineral King and Vicinity. Mineral King Comment
  CAS-BOT-BC80321  Sequoia sempervirens John Thomas Howell 1924-3-22 285 Sonoma Near Camp Meeker Comment
  CAS-BOT-BC240122  Setaria pumila John Thomas Howell 1959-9-20 34680 Butte Eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC240231  Setaria viridis John Thomas Howell 1962-7-7 38193 Kern Wofford 792 Comment
  CAS-BOT-BC213108  Sidalcea John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54082 Yuba About 2 miles northeast of dobbins on Oregon Hill Road, Sierra Nevada. 701 Comment
  GH376655  Silene aperta J. T. Howell 1950-7-17 27003 Unknown Trail from Bakeoven to Templeton Meadows 2682 Comment
  CAS-BOT-BC384314  Silene bernardina John Thomas Howell 1941-7-31 16542 Madera Agnew Pass Trail Comment
  CAS-BOT-BC385897  Silene douglasii John Thomas Howell 1925-6-30 1265 El Dorado Armstrong's, Emerald Bay, Lake Tahoe Comment
  RSA126121  Silene gallica J. T. Howell 1952-5-8 28313 San Francisco Golden Gate Heights, San Francisco. Comment
  RSA97651  Silene gallica J. T. Howell 1953-6-15 29080 Monterey Hastings Reservation, Santa Lucia Mountains Comment
  CAS-BOT-BC388956  Silene grayi John Thomas Howell 1937-7-26 13535 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 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
  CAS-BOT-BC389119  Silene laciniata subsp. californica John Thomas Howell 1923-6-24 87 Mariposa Ditch Trail, Wawona Valley 1219 Comment
  CAS-BOT-BC181340  Silene latifolia John Thomas Howell 1963-6-3 39385 Plumas Quincy - Sierra Nevada 1036 Comment
  CAS-BOT-BC389551  Silene nuda John Thomas Howell 1974-7-10 50547 Lassen Elysian Valley 1325 Comment
  CDA3477  Silene pseudatocion J. T. Howell 1972-4-19 48673 San Francisco San Francisco. 0 Comment
  CAS-BOT-BC389622  Silene sargentii John Thomas Howell 1946-7-20 22588 Fresno Ridge south of Mono Rock 3596 Comment
  CAS-BOT-BC175085  Silene verecunda John Thomas Howell 1962-7-11 38578 Kern North slope of Black Mountain 2255 Comment
  RSA287  Silene verecunda subsp. platyota J. T. Howell 1927-7-10 349 San Bernardino Big Bear, San Bernardino Mountains. 1828 Comment
  CAS-BOT-BC74970  Sinapis arvensis John Thomas Howell 1957-6-16 32637 San Francisco San Francisco. Third and Davidson Street. Comment
  CAS-BOT-BC75407  Sisymbrium orientale John Thomas Howell 1976-5-16 51644 Kern Delano. 97 Comment
  CAS-BOT-BC34696  Solanum lycopersicum J. T. Howell 1956-9-30 31894 San Francisco Drumm and Pacific Streets Comment
  CAS-BOT-BC136453  Solanum rostratum J. T. Howell 1985-7-6 s.n. Marin Terra Linda. Nazareth House gardens. Comment
  CAS-BOT-BC156775  Solanum umbelliferum J. T. Howell 1942-7-26 17251 Tulare Mineral King Comment
  CAS-BOT-BC157424  Solanum umbelliferum J. T. Howell 1933-4-22 11033 San Benito 1.5 miles s. of Tres Pinos Comment
  CAS-BOT-BC154219  Solanum umbelliferum J. T. Howell 1950-8-29 27437 Inyo Onion Valley road 2530 Comment
  CAS-BOT-BC157645  Solanum umbelliferum John Thomas Howell; Gordon H. True 1970-7-29 47110 Tulare Just east of Pine Flat on road to Cannell Meadow. Kern Plateau 2255 Comment
  CAS-BOT-BC231720  Solanum umbelliferum John Thomas Howell 1928-5-4 3775 Los Angeles Near Deer Park, Monrovia Canon [Canyon], San Gabriel Mts. Comment
  RSA1080  Solidago californica J. T. Howell 1928-6-30 1026 Ventura Santa Susana Pass Comment
  CAS-BOT-BC364979  Solidago confinis John Thomas Howell 1970-9-25 47444 28a Kern About 2 miles south of Kernville on road to Weldon 792 Comment
  CAS-BOT-BC339830  Solidago multiradiata John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54507 Mono Rock Creek road to Rock Creek Lake Basin 2849 Comment
  CAS-BOT-BC339883  Solidago multiradiata John Thomas Howell 1950-7-14 26874 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC365775  Solidago spectabilis John Thomas Howell 1962-9-25 38929 Kern South of Kernville below hot springs 792 Comment
  CAS-BOT-BC365046  Solidago velutina subsp. californica John Thomas Howell 1947-6-18 23253 Marin Chileno Valley Comment
  CAS-BOT-BC365895  Soliva sessilis John Thomas Howell 1956-6-24 31629 San Francisco South side of Bayview Hills, San Francisco Comment
  CAS-BOT-BC365829  Soliva sessilis John Thomas Howell 1964-4-29 40693 Tuolumne At Tuolumne River bridge, 2.5 miles east of Jacksonville 198 Comment
  CAS-BOT-BC365886  Soliva sessilis John Thomas Howell 1966-4-14 41480 Monterey Deer Flat Park, Monterey Comment
  CAS-BOT-BC157294  Sorbus californica John Thomas Howell 1943-7-23 18730 Nevada Between Donner Pass and West Lake Comment
  RSA263826  Sorghum bicolor J. T. Howell 1973-11-1 50304 Kern Bank of Kern River, Hart Memorial Park near Bakersfield 146 Comment
  CAS-BOT-BC390093  Spergularia atrosperma John Thomas Howell; Gordon H. True 1968-5-15 44492 Tulare About 4 1/2 miles east-northeast of Pixley. Across Road 160 83 Comment
  CAS-BOT-BC390182  Spergularia bocconi John Thomas Howell 1933-5-7 11216 San Francisco Odd Fellows Cemetery, San Francisco Comment
  CAS-BOT-BC390227  Spergularia bocconi John Thomas Howell 1953-6-15 29086 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  RSA0097866  Spergularia bocconi J. T. Howell 1944-9-24 20744 Marin Stinson Beach. Comment
  CAS-BOT-BC390244  Spergularia macrotheca var. leucantha John Thomas Howell 1973-7-25 50006 Merced Just north of Ingomar on Cottonwood Road to Gustine 30 Comment
  CAS-BOT-BC390243  Spergularia macrotheca var. leucantha John Thomas Howell 1926-5-2 1965 Merced 10 miles sw. of Merced Comment
  CAS-BOT-BC390285  Spergularia macrotheca var. longistyla John Thomas Howell 1938-4-10 13739 Alameda Eastern Livermore Valley Comment
  CAS-BOT-BC390886  Spergularia marina John Thomas Howell 1956-5-12 31367 San Francisco Marin St., San Francisco Comment
  CDA3438  Spergularia villosa J. T. Howell 1944-6-25 19643 Marin Santa Venetia . Comment
  CAS-BOT-BC391037  Spergularia villosa John Thomas Howell 1956-5-19 31437 San Francisco Hunters Point, San Francisco Comment
  CAS-BOT-BC339931  Sphaeromeria cana John Thomas Howell 1947-8-14 24099 Inyo Inconsolable Range 3962 Comment
  CAS-BOT-BC339954  Sphaeromeria cana John Thomas Howell 1944-8-16 20650 Mono Mono Pass Comment
  CAS-BOT-BC374805  Stebbinsoseris heterocarpa John Thomas Howell 1935-4-11 12592 Alameda Tesla Hills Comment
  CAS-BOT-BC175337  Stellaria borealis subsp. sitchana John Thomas Howell 1945-8-14 21399 Sonoma Perry Marsh Comment
  CAS-BOT-BC175350  Stellaria borealis subsp. sitchana John Thomas Howell 1943-7-4 18261 Marin Ledum Swamp on road to Pt. Reyes 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-BC398281  Stellaria umbellata John Thomas Howell 1944-8-7 20057 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC375414  Stephanomeria exigua subsp. coronaria John Thomas Howell 1950-7-16 26936 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC375340  Stephanomeria exigua subsp. coronaria John Thomas Howell 1957-6-25 32763 Kern Tehachapi Mts., 2.5 miles se. of Keene 914 Comment
  POM193913  Stephanomeria lactucina J. T. Howell 1924-8-11 632 Plumas 2 miles E of Chester on road to Westwood. 1311 Comment
  RSA39992  Stephanomeria tenuifolia J. T. Howell 1944-8-3 19861 Alpine W side of Sonora Pass. 2348 Comment
  CAS-BOT-BC61257  Streptanthus breweri John Thomas Howell 1955-6-13 30364 Trinity Peanut. 762 Comment
  GH422056  Streptanthus cordatus var. piutensis J. T. Howell & G. H. True 1971-6-17 48039 Unknown 1 mile east of Bodfish Gap 1310 Comment
  CAS-BOT-BC87060  Streptanthus fenestratus John Thomas Howell 1960-6-6 35335 Fresno Sierra Nevada. Copper Creek Trail, Kings River Canyon. 1676 Comment
  CAS-BOT-BC87774  Streptanthus tortuosus John Thomas Howell 1943-7-21 18659 Placer Donner Pass to Mount Lincoln. Comment
  CAS-BOT-BC87783  Streptanthus tortuosus John Thomas Howell 1966-7-26 41998 Plumas Sierra Nevada. Injun Jim Campground at confluence of Granite Creek and North Fork of Feather River. 609 Comment
  CAS-BOT-BC87900  Streptanthus tortuosus John Thomas Howell 1942-7-30 17418 Tulare Little Five Lakes Basin. 3200 Comment
  GH422330  Streptanthus tortuosus J. T. Howell 1963-7-12 39845 Unknown Meyers 1935 Comment
  GH384787  Styrax redivivus J. T. Howell 1973-7-9 49700 Unknown Feather River Highway near Bear Ranch Creek 457 Comment
  POM261436  Styrax redivivus J. T. Howell 1940-6-30 15589 Lake Soda Bay. Comment
  RSA271  Suaeda moquinii J. T. Howell 1927-7-9 296 San Bernardino Between Deadman s Point and Box S Ranch, Mojave Desert. 915 Comment
  CAS-BOT-BC180101  Swertia albicaulis var. albicaulis John Thomas Howell 1934-6-30 12294 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC234692  Symphoricarpos mollis John Thomas Howell 1923-8-1 204 Mariposa Buck Camp Trail, Yosemite Park Comment
  CAS-BOT-BC237006  Symphoricarpos mollis John Thomas Howell 1967-6-23 42676 Plumas Canyon of Butterfly Creek, Sierra Nevada 1036 Comment
  CAS-BOT-BC269710  Symphoricarpos mollis John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 54012 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-BC238898  Symphoricarpos rotundifolius John Thomas Howell 1977-8-3 52513 Alpine Just north of Ebbetts Pass 2682 Comment
  CAS-BOT-BC238986  Symphoricarpos rotundifolius John Thomas Howell 1947-7-18 23388 Los Angeles Blue Ridge, San Gabriel Mts. 2590 Comment
  CAS-BOT-BC238995  Symphoricarpos rotundifolius John Thomas Howell 1969-9-14 46212 Mono Leavitt Meadow 2194 Comment
  CAS-BOT-BC245803  Symphoricarpos rotundifolius John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53878 Tulare Summit ridge of Bald Mountain, Kern Plateau, Sierra Nevada 2834 Comment
  CAS-BOT-BC97761  Symphyotrichum chilense John Thomas Howell 1956-8-19 31790 San Francisco North side, Bayview Hills Comment
  CAS-BOT-BC97867  Symphyotrichum eatonii John Thomas Howell 1926-7-27 2143 Plumas Near Prattville 1463 Comment
  CAS-BOT-BC98556  Symphyotrichum lentum John Thomas Howell 1925-11-27 1564 Solano Green Valley near Cordelia Comment
  CAS-BOT-BC98470  Symphyotrichum spathulatum John Thomas Howell 1934-7-4 12412 Shasta 3 miles sw. of Fall River Mills Comment
  CAS-BOT-BC99355  Symphyotrichum spathulatum John Thomas Howell 1944-8-5 19950 Tuolumne Soda Springs, Tuolumne Meadows Comment
  UC703208  Symphyotrichum spathulatum J. Thomas Howell 1941-8-10 16929 Madera Agnew Meadows Comment
  CAS-BOT-BC98883  Symphyotrichum spathulatum var. intermedium John Thomas Howell 1936-8-24 12737 Trinity Summit of Scott Mts. n. of Carrville Comment
  CAS-BOT-BC98255  Symphyotrichum subulatum var. parviflorum John Thomas Howell 1967-11-3 44034 Tulare Vernal pool nartural area, about 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC98347  Symphyotrichum subulatum var. parviflorum John Thomas Howell 1973-11-1 50294 Kern Bank of Kern River, Hart Memorial Park near Bakersfield 146 Comment
  GH443143  Systenotheca vortriedei J. T. Howell 1955-7-8 30649 Unknown Hanging Valley, Santa Lucia Mts., 838 Comment
  CAS-BOT-BC221907  Taeniatherum caput-medusae John Thomas Howell 1954-5-16 29615 El Dorado Shingle Springs 426 Comment
  CAS-BOT-BC221963  Taeniatherum caput-medusae John Thomas Howell; Walter Knight; Irja Knight 1987-5-27 6235 Sonoma Todd Road Preserve 24 Comment
  RSA958  Tetradymia comosa J. T. Howell 1927-7-28 508 Orange Nolina Canyon, Rancho Santa Ana 152 Comment
  CAS-BOT-BC438256  Tetragonia tetragonoides John Thomas Howell 1956-9-26 31885 San Francisco San Francisco. Lake Merced Comment
  CAS-BOT-BC392335  Thalictrum fendleri John Thomas Howell 1946-7-21 22604 Fresno Fourth Recess 3078 Comment
  CAS-BOT-BC392366  Thalictrum fendleri John Thomas Howell 1938-8-8 14408 Mono Mammouth [Mammoth] Lakes Basin Comment
  UC1176743  Thalictrum fendleri var. polycarpum John Thomas Howell 1939-6-18 Marin Mud Lake Pt. Reyes Peninsula Comment
  CAS-BOT-BC176277  Thamnosma montana John Thomas Howell 1928-6-19 4028 Inyo Panamint City, Surprise [Canon] Canyon, Panamint Mts. 2133 Comment
  CAS-BOT-BC88015  Thelypodium crispum John Thomas Howell 1938-8-8 14389 Mono Long Valley. Comment
  CAS-BOT-BC88240  Thysanocarpus curvipes John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52782 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-BC88400  Thysanocarpus curvipes John Thomas Howell 1976-5-17 51693 Kern Sierra Nevada. Greenhorn Mountains. Near headwaters of Lumreau Creek. 1402 Comment
  CAS-BOT-BC88505  Thysanocarpus curvipes John Thomas Howell 1972-4-24 48684 Mariposa Sierra Nevada. Catheys Valley. 426 Comment
  CAS-BOT-BC66464  Thysanocarpus curvipes John Thomas Howell 1956-3-25 31229 Monterey 13 miles from Greenfield on Jamesburg road. Comment
  CAS-BOT-BC88497  Thysanocarpus curvipes John Thomas Howell 1960-5-2 35243 Mariposa Sierra Nevada. Northwest of Coulterville. Comment
  CAS-BOT-BC66952  Thysanocarpus laciniatus John Thomas Howell 1943-4-11 17911 Marin Black Canyon, San Rafael Hills. Comment
  CAS-BOT-BC67062  Thysanocarpus laciniatus John Thomas Howell 1963-5-6 39088 Monterey Santa Lucia Mountains. 4 miles south of King City on road to Jolon. 121 Comment
  CAS-BOT-BC67224  Thysanocarpus laciniatus John Thomas Howell; Gordon H. True 1967-5-29 42368 Tulare Sierra Nevada. Kern Plateau. Near north end of Lamont Meadow on road to Chimney Meadow. 1859 Comment
  UC421691  Thysanocarpus laciniatus John Thomas Howell 1930-3-29 4596 San Benito The Pinnacles Comment
  CAS-BOT-BC67187  Thysanocarpus laciniatus John Thomas Howell 1931-3-21 5932 Santa Barbara Cuyama Valley, 28 miles east of Santa Maria. Comment
  UC905052  Torreya californica John Thomas Howell 1948-5-16 24303 Marin near top Eldridge Grade; Mt. Tamalpais Comment
  CAS-BOT-BC169197  Toxicodendron diversilobum John Thomas Howell; Alice Eastwood 1938-5-17 5651 Lake Near Upper Lake Comment
  CAS-BOT-BC172912  Toxicodendron diversilobum John Thomas Howell 1936-8-26 12826 Trinity Near junction of Tangle Blue and Scott Mt. creeks Comment
  CAS-BOT-BC323058  Tracyina rostrata John Thomas Howell 1967-6-17 42599 Sonoma On Arthur E. Cooley Ranch at confluence of Galloway adn Dry Creeks, northern Sonoma Co. 182 Comment
  UCR89358  Tragopogon dubius J. T. Howell 1958-8-2 34228 Fresno Kings River Canyon between Copper Creek and Roaring River. 1524 Comment
  CAS-BOT-BC517445  Triantha occidentalis subsp. occidentalis John Thomas Howell 1948-7-22 24909 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC519391  Triantha occidentalis subsp. occidentalis John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54385 Plumas Sierra Nevada, 0.25 miles east of Bucks Summit on road to Quincy 1670 Comment
  PGM1190  Tribulus terrestris J. T. Howell 1973-11-4 Monterey Salinas Valley, King City, in cultivated area (weedy) Comment
  RSA440  Tribulus terrestris J. T. Howell 1927-7-7 285 Orange Near ranch house, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC111157  Trichophorum clementis John Thomas Howell 1944-8-8 20108 Tuolumne Elizabeth Lake Comment
  CAS-BOT-BC111208  Trichophorum clementis John Thomas Howell 1940-8-4 15985 Tulare Ouzel Basin 3200 Comment
  UCD125846  Trichostema lanceolatum John Thomas Howell; Gordon H. True 1967-7-6 43219 Tulare About 4.5 miles east-northeast of Pixley. 83 Comment
  UC1177206  Trifolium albopurpureum var. dichotomum John Thomas Howell 1947-4-27 23104 Marin w side San Anselmo (type region); Bald Mtn Comment
  UC866824  Trifolium depauperatum var. depauperatum John Thomas Howell 1938-4-3 13729 San Joaquin Corral Hollow Comment
  RSA118039  Trifolium depauperatum var. truncatum J. T. Howell 1955-5-20 30228 Monterey Summit of Jamesburg Road, Santa Lucia Mts. Comment
  UCD108944  Trifolium fragiferum John Thomas Howell 1958-7-16 33644 Alameda UC Berkeley. West of Hilgard Hall. Comment
  UC866961  Trifolium kingii var. productum John Thomas Howell 1938-8-2 13995 Placer 5 mi n Brockway Comment
  CDA28060  Trifolium variegatum var. major J. T. Howell, Catherine Best, Wilma Follette, G. H. True 1980-6-19 53716 Marin Near Abbotts Lagoon, Point Reyes Peninsula. 0 Comment
  CAS-BOT-BC451817  Triglochin maritima John Thomas Howell 1962-7-9 38354 Kern Isabella 762 Comment
  CAS-BOT-BC451853  Triglochin maritima John Thomas Howell 1944-5-28 19509 Marin Manzanita Comment
  CAS-BOT-BC451854  Triglochin maritima John Thomas Howell 1944-5-7 19447 Marin Larkspur salt marsh Comment
  CAS-BOT-BC451848  Triglochin maritima John Thomas Howell 1939-5-21 s.n. Marin On west side of Tiburon Peninsula Comment
  CAS-BOT-BC451899  Triglochin maritima John Thomas Howell 1963-9-4 40356 Monterey Elkhorn Slough Comment
  RSA368930  Triglochin palustris J. T. Howell 1948-7-26 25073 Tulare Center Basin. 3415 Comment
  CAS-BOT-BC238513  Triphysaria floribunda John Thomas Howell 1945-6-3 20914 Marin Near Inverness Comment
  CAS-BOT-BC199584  Trisetum canescens John Thomas Howell 1951-8-21 28253 Sierra 5 miles from Calpine on road to Blairsden 1524 Comment
  CAS-BOT-BC199671  Trisetum canescens John Thomas Howell 1943-7-23 18741 Nevada Between Donner Pass and West Lake Comment
  CAS-BOT-BC199704  Trisetum canescens John Thomas Howell 1973-7-10 49755 Plumas Near Greenville 1097 Comment
  CAS-BOT-BC200109  Trisetum canescens John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 54007 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-BC193575  Trisetum spicatum John Thomas Howell 1948-7-22 24910 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC200176  Trisetum spicatum John Thomas Howell 1946-7-14 22298 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC200180  Trisetum spicatum John Thomas Howell 1946-7-26 22725 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC200229  Trisetum spicatum John Thomas Howell; Gordon H. True 1968-7-18 4437 Mono Basin at north end of Saddlebag Lake, head of Lee Vining Creek 3048 Comment
  CAS-BOT-BC200286  Trisetum spicatum John Thomas Howell 1940-8-1 15786 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC200417  Trisetum spicatum John Thomas Howell 1942-7-31 17464 Tulare Mt. Kaweah Comment
  UCD93715  Trisetum spicatum John Thomas Howell 1958-8-17 34583 Madera Sierra Nevada. East Fork of Granite Creek. 2362 Comment
  CAS-BOT-BC200448  Trisetum wolfii John Thomas Howell 1946-7-14 22282 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC200453  Trisetum wolfii John Thomas Howell 1960-8-23 36445 Shasta Lassen Loop above Little Hot Springs Valley 2407 Comment
  CAS-BOT-BC521617  Triteleia hyacinthina John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52893 Calaveras Sierra Nevada, near Wallace, Upper Sonoran Zone 66 Comment
  CAS-BOT-BC522038  Triteleia ixioides subsp. anilina John Thomas Howell 1954-6-6 29942 Tuolumne Twain Harte, Sierra Nevada 1127 Comment
  CAS-BOT-BC522155  Triteleia laxa John Thomas Howell 1925-3-22 811 Alameda Arroyo Mocho Comment
  CAS-BOT-BC67396  Tropidocarpum gracile John Thomas Howell 1944-4-30 19424 Alameda Portuguese Flat, Oakland Hills above Mills College. Comment
  CAS-BOT-BC74135  Turritis glabra John Thomas Howell; Gordon H. True 1966-7-11 41666 Tulare Sierra Nevada. Kern Plateau. Poison Meadow. 2286 Comment
  CAS-BOT-BC77655  Ulmus pumila John Thomas Howell; Gordon H. True 1966-7-10 41603 Tulare Along road in Kern River Canyon at Roads End, at Fairview 1066 Comment
  NY500467  Ulmus pumila J. T. Howell 1978-4-20 52869 Lassen Susanville 1296.9 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-BC91170  Umbellularia californica John Thomas Howell 1975-6-4 51021 Mariposa Sierra Nevada. Yosemite Valley. Glacier Point talus near Camp Curry. 1219 Comment
  CAS-BOT-BC381862  Uropappus lindleyi John Thomas Howell; Gordon H. True 1971-6-17 48049 Kern 1 mile east of Bodfish Gap 1310 Comment
  CAS-BOT-BC404084  Urtica dioica subsp. holosericea John Thomas Howell 1948-7-29 25175 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC404151  Urtica dioica subsp. holosericea John Thomas Howell 1966-7-20 41991 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC404180  Urtica dioica subsp. holosericea John Thomas Howell 1963-8-6 40028 Monterey Santa Lucia Mountains. Abbott Lakes, Arroyo Seco Forest Service Campground Comment
  UC1176759  Urtica dioica subsp. holosericea John Thomas Howell 1945-8-5 21365 Marin near Stinson Beach Comment
  UC473472  Urtica dioica subsp. holosericea John Thomas Howell 1928-6-19 4041 Inyo Panamint Mountains, Surprise Canyon Surprise Canyon; Panamint Mountains, Surprise Canyon Comment
  CAS-BOT-BC193966  Vaccinium cespitosum John Thomas Howell 1941-7-22 16404 Inyo Mono Pass Trail 3352 Comment
  CAS-BOT-BC199432  Vaccinium shastense subsp. nevadense John Thomas Howell 1924-5-26 353 Mariposa Near Wawona 1219 Comment
  CAS-BOT-BC199460  Vaccinium shastense subsp. nevadense John Thomas Howell; Gordon H. True 1970-5-28 5357 Nevada Skillman Flat on Washington Ridge, ca. 12 mi. E. of Nevada City 1341 Comment
  CAS-BOT-BC391343  Velezia rigida John Thomas Howell; H. Keith Wagnon 1980-5-26 53580 Butte Feather River Canyon Highway, 2.4 miles southwest of Pulga Bridge Comment
  UCD139934  Veratrum californicum var. californicum John Thomas Howell 1960-8-20 36278 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  SEINET1007899  Verbena brasiliensis John Thomas Howell 1954-1 30055 Amador Mokelumne River Bridge on Highway 49. Between Jackson and Mokelumne Hill. Type region of V. Hansenii Comment
  CDA36585  Viola pinetorum subsp. grisea J. T. Howell, G. H. True 1970-6-26 46835 Tulare Kern Plateau, Sierra Nevada; True Meadow. Comment
  CAS-BOT-BC203074  Vitis californica John Thomas Howell 1924-7-13 463 Mariposa Wawona Valley 1219 Comment
  CAS-BOT-BC198836  Vulpia bromoides John Thomas Howell 1963-5-18 39341 Monterey 2.5 miles south of Aromas 60 Comment
  CAS-BOT-BC198865  Vulpia bromoides John Thomas Howell 1937-5-23 13003 San Francisco Presidio, San Fransisco Comment
  CAS-BOT-BC199970  Vulpia microstachys var. ciliata John Thomas Howell 1948-4-18 24205 Sonoma Hills east of Aqua Caliente Comment
  GH341834  Vulpia microstachys var. ciliata J. T. Howell 1939-4-30 14624 Unknown Walter Springs Comment
  RSA300184  Vulpia microstachys var. ciliata J. T. Howell, Gordon H. True 1968-5-13 44247 Tulare North Meadow Creek; Kern Plateau. 1982 Comment
  UCD93845  Vulpia microstachys var. ciliata John Thomas Howell 1963-5-6 39124 Monterey top of Jolon Garde, Santa Lucia Mountains. 426 Comment
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Mar 3 2012
  SBBG41110  Vulpia microstachys var. confusa J. T. Howell 1954-5-10 Fresno near Alder Springs 1402 Comment
  CAS-BOT-BC183999  Vulpia microstachys var. microstachys John Thomas Howell 1938-5-22 13793 Marin San Anselmo Canyon Comment
  CAS-BOT-BC184157  Vulpia microstachys var. pauciflora John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52796 Calaveras Near Stanislaus River bridge, Camp Nine Road northeast of Vallecito 335 Comment
  CAS-BOT-BC184184  Vulpia microstachys var. pauciflora John Thomas Howell 1962-6-16 37561 Butte Magalia 731 Comment
  CAS-BOT-BC184242  Vulpia microstachys var. pauciflora John Thomas Howell 1960-3-26 35192 Kern Kernville Comment
  CAS-BOT-BC184347  Vulpia microstachys var. pauciflora John Thomas Howell 1945-5-6 20801 Marin San Rafael Hills Comment
  CAS-BOT-BC184640  Vulpia microstachys var. pauciflora John Thomas Howell 1953-5-22 28988 Tuolumne Cedar Ridge Road near Twain Harte 1066 Comment
  GH341852  Vulpia microstachys var. pauciflora J. T. Howell 1957-5-5 32167 Unknown San Francisco, Serpentine cut, east end of 22nd st. Comment
  RSA127236  Vulpia microstachys var. pauciflora J. T. Howell 1946-5-14 21838 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais. Comment
  UCD94782  Vulpia myuros John Thomas Howell 1962-5-22 37296 Tulare Kern River Canyon above Roads End. 1097 Comment
  CAS-BOT-BC184666  Vulpia myuros subsp. megalura John Thomas Howell 1963-7-10 39678 Alpine At Grover Hot Springs 1798 Comment
  GH361316  Vulpia myuros var. hirsuta J. T. Howell 1962-5-22 37296 Unknown Kern River Canyon above Roads End 1097 Comment
  GH361328  Vulpia myuros var. hirsuta J. T. Howell 1938-6-19 13914 Unknown Zigzag Fire Trail, Mt. Tamalpais Comment
  RSA44480  Vulpia myuros var. hirsuta J. T. Howell 1948-3-29 24201 Solano About five miles north of Vallejo. Comment
  CAS-BOT-BC178593  Vulpia myuros var. myuros John Thomas Howell 1967-3-14 42039 Monterey On San Simeon Hwy. at Pt. Sur Comment
  CAS-BOT-BC185870  Vulpia octoflora var. hirtella John Thomas Howell 1958-5-24 33318 Inyo Whitney Portal road 1981 Comment
  CAS-BOT-BC185971  Vulpia octoflora var. octoflora John Thomas Howell 1941-5-25 16200 Marin West Point to West Peak, Mt. Tamalpais Comment
  RSA1433  Wolffiella lingulata J. T. Howell 1928-9-6 1204 Orange Santa Ana River, Rancho Santa Ana. 152 Comment
  SEINET11770036  Wolffiella lingulata J. T. Howell 1932-1 10790 San Joaquin Holt Comment
  CAS-BOT-BC77761  Woodsia scopulina John Thomas Howell 1940-8-4 15990 Tulare Ouzel Basin 3200 Comment
  CAS-BOT-BC326982  Wyethia longicaulis John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-19 53475 Trinity Rattlesnake Road 0.73 to 1.5 miles southwest of Peanut 853 Comment
  CAS-BOT-BC383445  Wyethia mollis John Thomas Howell 1944-7-15 19798 Glenn Canyon of Snow Basin Creek Comment
  CAS-BOT-BC383647  Xanthium spinosum John Thomas Howell; H. Keith Wagnon 1980-5-27 53683 Plumas Quincy 1051 Comment
  CAS-BOT-BC383750  Xanthium strumarium John Thomas Howell 1959-9-21 34804 Plumas Near Paxton 883 Comment
  CAS-BOT-BC383769  Xanthium strumarium John Thomas Howell 1932-10-16 10848 San Joaquin Bed of Corral Hollow Creek, 8 miles from Tracy on Tesla Road Comment
  CAS-BOT-BC196886  Xylococcus bicolor John Thomas Howell 1977-3-9 52317 San Diego North of Escondido on highway to Temecula Comment
  CAS-BOT-BC326964  Xylorhiza cognata John Thomas Howell 1928-1-29 3293 Riverside Painted Canyon, Colorado Desert Comment
  CAS-BOT-BC326907  Xylorhiza orcuttii John Thomas Howell 1928-3-24 3490 San Diego Near Palm Wash, w. Colorado Desert Comment
  CAS-BOT-BC527204  Zigadenus micranthus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-19 53473 Trinity Rattlesnake road 0.73 to 1.5 miles southwest of Peanut 853 Comment
  CAS-BOT-BC531975  Zigadenus venenosus John Thomas Howell 1958-7-24 33891 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC533082  Zigadenus venenosus John Thomas Howell 1960-7-22 35926 Plumas Devils Kitchen, near Drakesbad; Lassen Volcanic National Park 1828 Comment
  RSA1042  Ziziphus parryi J. T. Howell 1927-8-1 s.n. San Bernardino Morongo Valley. 915 Comment



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